Pileus Git - ~andy/gtk/blob - gtk/gtktextview.c

   1 /* -*- Mode: C; c-file-style: "gnu"; tab-width: 8 -*- */
   2 /* GTK - The GIMP Toolkit
   3  * gtktextview.c Copyright (C) 2000 Red Hat, Inc.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  23  * file for a list of people on the GTK+ Team.  See the ChangeLog
  24  * files for a list of changes.  These files are distributed with
  25  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  26  */
  27
  28 #include "config.h"
  29 #include <string.h>
  30
  31 #define GTK_TEXT_USE_INTERNAL_UNSUPPORTED_API
  32 #include "gtkbindings.h"
  33 #include "gtkdnd.h"
  34 #include "gtkimagemenuitem.h"
  35 #include "gtkintl.h"
  36 #include "gtkmain.h"
  37 #include "gtkmarshalers.h"
  38 #include "gtkmenu.h"
  39 #include "gtkmenuitem.h"
  40 #include "gtkseparatormenuitem.h"
  41 #include "gtksettings.h"
  42 #include "gtkstock.h"
  43 #include "gtksizerequest.h"
  44 #include "gtktextbufferrichtext.h"
  45 #include "gtktextdisplay.h"
  46 #include "gtktextview.h"
  47 #include "gtkimmulticontext.h"
  48 #include "gdk/gdkkeysyms.h"
  49 #include "gtkprivate.h"
  50 #include "gtktextutil.h"
  51 #include "gtkwindow.h"
  52
  53
  54 /* How scrolling, validation, exposes, etc. work.
  55  *
  56  * The expose_event handler has the invariant that the onscreen lines
  57  * have been validated.
  58  *
  59  * There are two ways that onscreen lines can become invalid. The first
  60  * is to change which lines are onscreen. This happens when the value
  61  * of a scroll adjustment changes. So the code path begins in
  62  * gtk_text_view_value_changed() and goes like this:
  63  *   - gdk_window_scroll() to reflect the new adjustment value
  64  *   - validate the lines that were moved onscreen
  65  *   - gdk_window_process_updates() to handle the exposes immediately
  66  *
  67  * The second way is that you get the "invalidated" signal from the layout,
  68  * indicating that lines have become invalid. This code path begins in
  69  * invalidated_handler() and goes like this:
  70  *   - install high-priority idle which does the rest of the steps
  71  *   - if a scroll is pending from scroll_to_mark(), do the scroll,
  72  *     jumping to the gtk_text_view_value_changed() code path
  73  *   - otherwise, validate the onscreen lines
  74  *   - DO NOT process updates
  75  *
  76  * In both cases, validating the onscreen lines can trigger a scroll
  77  * due to maintaining the first_para on the top of the screen.
  78  * If validation triggers a scroll, we jump to the top of the code path
  79  * for value_changed, and bail out of the current code path.
  80  *
  81  * Also, in size_allocate, if we invalidate some lines from changing
  82  * the layout width, we need to go ahead and run the high-priority idle,
  83  * because GTK sends exposes right after doing the size allocates without
  84  * returning to the main loop. This is also why the high-priority idle
  85  * is at a higher priority than resizing.
  86  *
  87  */
  88
  89 #if 0
  90 #define DEBUG_VALIDATION_AND_SCROLLING
  91 #endif
  92
  93 #ifdef DEBUG_VALIDATION_AND_SCROLLING
  94 #define DV(x) (x)
  95 #else
  96 #define DV(x)
  97 #endif
  98
  99 #define SCREEN_WIDTH(widget) text_window_get_width (GTK_TEXT_VIEW (widget)->priv->text_window)
 100 #define SCREEN_HEIGHT(widget) text_window_get_height (GTK_TEXT_VIEW (widget)->priv->text_window)
 101
 102 #define SPACE_FOR_CURSOR 1
 103
 104 #define GTK_TEXT_VIEW_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GTK_TYPE_TEXT_VIEW, GtkTextViewPrivate))
 105
 106 typedef struct _GtkTextWindow GtkTextWindow;
 107 typedef struct _GtkTextPendingScroll GtkTextPendingScroll;
 108
 109 struct _GtkTextViewPrivate
 110 {
 111   GtkTextLayout *layout;
 112   GtkTextBuffer *buffer;
 113
 114   guint blink_time;  /* time in msec the cursor has blinked since last user event */
 115   guint im_spot_idle;
 116   gchar *im_module;
 117   GdkDevice *grab_device;
 118   GdkDevice *dnd_device;
 119
 120   guint selection_drag_handler;
 121   guint scroll_timeout;
 122
 123   GtkTextWindow *text_window;
 124   GtkTextWindow *left_window;
 125   GtkTextWindow *right_window;
 126   GtkTextWindow *top_window;
 127   GtkTextWindow *bottom_window;
 128
 129   GtkAdjustment *hadjustment;
 130   GtkAdjustment *vadjustment;
 131
 132   gint xoffset;         /* Offsets between widget coordinates and buffer coordinates */
 133   gint yoffset;
 134   gint width;           /* Width and height of the buffer */
 135   gint height;
 136
 137   /* This is used to monitor the overall size request
 138    * and decide whether we need to queue resizes when
 139    * the buffer content changes.
 140    *
 141    * FIXME: This could be done in a simpler way by
 142    * consulting the above width/height of the buffer + some
 143    * padding values, however all of this request code needs
 144    * to be changed to use GtkSizeRequestIface and deserves
 145    * more attention.
 146    */
 147   GtkRequisition cached_size_request;
 148
 149   /* The virtual cursor position is normally the same as the
 150    * actual (strong) cursor position, except in two circumstances:
 151    *
 152    * a) When the cursor is moved vertically with the keyboard
 153    * b) When the text view is scrolled with the keyboard
 154    *
 155    * In case a), virtual_cursor_x is preserved, but not virtual_cursor_y
 156    * In case b), both virtual_cursor_x and virtual_cursor_y are preserved.
 157    */
 158   gint virtual_cursor_x;   /* -1 means use actual cursor position */
 159   gint virtual_cursor_y;   /* -1 means use actual cursor position */
 160
 161   GtkTextMark *first_para_mark; /* Mark at the beginning of the first onscreen paragraph */
 162   gint first_para_pixels;       /* Offset of top of screen in the first onscreen paragraph */
 163
 164   GtkTextMark *dnd_mark;
 165   guint blink_timeout;
 166
 167   guint first_validate_idle;        /* Idle to revalidate onscreen portion, runs before resize */
 168   guint incremental_validate_idle;  /* Idle to revalidate offscreen portions, runs after redraw */
 169
 170   GtkIMContext *im_context;
 171   GtkWidget *popup_menu;
 172
 173   gint drag_start_x;
 174   gint drag_start_y;
 175
 176   GSList *children;
 177
 178   GtkTextPendingScroll *pending_scroll;
 179
 180   gint pending_place_cursor_button;
 181
 182   /* Default style settings */
 183   gint pixels_above_lines;
 184   gint pixels_below_lines;
 185   gint pixels_inside_wrap;
 186   GtkWrapMode wrap_mode;
 187   GtkJustification justify;
 188   gint left_margin;
 189   gint right_margin;
 190   gint indent;
 191   PangoTabArray *tabs;
 192   guint editable : 1;
 193
 194   guint overwrite_mode : 1;
 195   guint cursor_visible : 1;
 196
 197   /* if we have reset the IM since the last character entered */
 198   guint need_im_reset : 1;
 199
 200   guint accepts_tab : 1;
 201
 202   guint width_changed : 1;
 203
 204   /* debug flag - means that we've validated onscreen since the
 205    * last "invalidate" signal from the layout
 206    */
 207   guint onscreen_validated : 1;
 208
 209   guint mouse_cursor_obscured : 1;
 210
 211   guint scroll_after_paste : 1;
 212 };
 213
 214 struct _GtkTextPendingScroll
 215 {
 216   GtkTextMark   *mark;
 217   gdouble        within_margin;
 218   gboolean       use_align;
 219   gdouble        xalign;
 220   gdouble        yalign;
 221 };
 222
 223 enum
 224 {
 225   SET_SCROLL_ADJUSTMENTS,
 226   POPULATE_POPUP,
 227   MOVE_CURSOR,
 228   PAGE_HORIZONTALLY,
 229   SET_ANCHOR,
 230   INSERT_AT_CURSOR,
 231   DELETE_FROM_CURSOR,
 232   BACKSPACE,
 233   CUT_CLIPBOARD,
 234   COPY_CLIPBOARD,
 235   PASTE_CLIPBOARD,
 236   TOGGLE_OVERWRITE,
 237   MOVE_VIEWPORT,
 238   SELECT_ALL,
 239   TOGGLE_CURSOR_VISIBLE,
 240   PREEDIT_CHANGED,
 241   LAST_SIGNAL
 242 };
 243
 244 enum
 245 {
 246   PROP_0,
 247   PROP_PIXELS_ABOVE_LINES,
 248   PROP_PIXELS_BELOW_LINES,
 249   PROP_PIXELS_INSIDE_WRAP,
 250   PROP_EDITABLE,
 251   PROP_WRAP_MODE,
 252   PROP_JUSTIFICATION,
 253   PROP_LEFT_MARGIN,
 254   PROP_RIGHT_MARGIN,
 255   PROP_INDENT,
 256   PROP_TABS,
 257   PROP_CURSOR_VISIBLE,
 258   PROP_BUFFER,
 259   PROP_OVERWRITE,
 260   PROP_ACCEPTS_TAB,
 261   PROP_IM_MODULE
 262 };
 263
 264 static void gtk_text_view_destroy              (GtkObject        *object);
 265 static void gtk_text_view_finalize             (GObject          *object);
 266 static void gtk_text_view_set_property         (GObject         *object,
 267                                                 guint            prop_id,
 268                                                 const GValue    *value,
 269                                                 GParamSpec      *pspec);
 270 static void gtk_text_view_get_property         (GObject         *object,
 271                                                 guint            prop_id,
 272                                                 GValue          *value,
 273                                                 GParamSpec      *pspec);
 274 static void gtk_text_view_size_request         (GtkWidget        *widget,
 275                                                 GtkRequisition   *requisition);
 276 static void gtk_text_view_size_allocate        (GtkWidget        *widget,
 277                                                 GtkAllocation    *allocation);
 278 static void gtk_text_view_realize              (GtkWidget        *widget);
 279 static void gtk_text_view_unrealize            (GtkWidget        *widget);
 280 static void gtk_text_view_style_set            (GtkWidget        *widget,
 281                                                 GtkStyle         *previous_style);
 282 static void gtk_text_view_direction_changed    (GtkWidget        *widget,
 283                                                 GtkTextDirection  previous_direction);
 284 static void gtk_text_view_grab_notify          (GtkWidget        *widget,
 285                                                 gboolean         was_grabbed);
 286 static void gtk_text_view_state_changed        (GtkWidget        *widget,
 287                                                 GtkStateType      previous_state);
 288
 289 static gint gtk_text_view_event                (GtkWidget        *widget,
 290                                                 GdkEvent         *event);
 291 static gint gtk_text_view_key_press_event      (GtkWidget        *widget,
 292                                                 GdkEventKey      *event);
 293 static gint gtk_text_view_key_release_event    (GtkWidget        *widget,
 294                                                 GdkEventKey      *event);
 295 static gint gtk_text_view_button_press_event   (GtkWidget        *widget,
 296                                                 GdkEventButton   *event);
 297 static gint gtk_text_view_button_release_event (GtkWidget        *widget,
 298                                                 GdkEventButton   *event);
 299 static gint gtk_text_view_focus_in_event       (GtkWidget        *widget,
 300                                                 GdkEventFocus    *event);
 301 static gint gtk_text_view_focus_out_event      (GtkWidget        *widget,
 302                                                 GdkEventFocus    *event);
 303 static gint gtk_text_view_motion_event         (GtkWidget        *widget,
 304                                                 GdkEventMotion   *event);
 305 static gint gtk_text_view_expose_event         (GtkWidget        *widget,
 306                                                 GdkEventExpose   *expose);
 307 static void gtk_text_view_draw_focus           (GtkWidget        *widget);
 308 static gboolean gtk_text_view_focus            (GtkWidget        *widget,
 309                                                 GtkDirectionType  direction);
 310 static void gtk_text_view_move_focus           (GtkWidget        *widget,
 311                                                 GtkDirectionType  direction_type);
 312 static void gtk_text_view_select_all           (GtkWidget        *widget,
 313                                                 gboolean          select);
 314
 315
 316 /* Source side drag signals */
 317 static void gtk_text_view_drag_begin       (GtkWidget        *widget,
 318                                             GdkDragContext   *context);
 319 static void gtk_text_view_drag_end         (GtkWidget        *widget,
 320                                             GdkDragContext   *context);
 321 static void gtk_text_view_drag_data_get    (GtkWidget        *widget,
 322                                             GdkDragContext   *context,
 323                                             GtkSelectionData *selection_data,
 324                                             guint             info,
 325                                             guint             time);
 326 static void gtk_text_view_drag_data_delete (GtkWidget        *widget,
 327                                             GdkDragContext   *context);
 328
 329 /* Target side drag signals */
 330 static void     gtk_text_view_drag_leave         (GtkWidget        *widget,
 331                                                   GdkDragContext   *context,
 332                                                   guint             time);
 333 static gboolean gtk_text_view_drag_motion        (GtkWidget        *widget,
 334                                                   GdkDragContext   *context,
 335                                                   gint              x,
 336                                                   gint              y,
 337                                                   guint             time);
 338 static gboolean gtk_text_view_drag_drop          (GtkWidget        *widget,
 339                                                   GdkDragContext   *context,
 340                                                   gint              x,
 341                                                   gint              y,
 342                                                   guint             time);
 343 static void     gtk_text_view_drag_data_received (GtkWidget        *widget,
 344                                                   GdkDragContext   *context,
 345                                                   gint              x,
 346                                                   gint              y,
 347                                                   GtkSelectionData *selection_data,
 348                                                   guint             info,
 349                                                   guint             time);
 350
 351 static void gtk_text_view_set_scroll_adjustments (GtkTextView   *text_view,
 352                                                   GtkAdjustment *hadj,
 353                                                   GtkAdjustment *vadj);
 354 static gboolean gtk_text_view_popup_menu         (GtkWidget     *widget);
 355
 356 static void gtk_text_view_move_cursor       (GtkTextView           *text_view,
 357                                              GtkMovementStep        step,
 358                                              gint                   count,
 359                                              gboolean               extend_selection);
 360 static gboolean gtk_text_view_move_viewport (GtkTextView           *text_view,
 361                                              GtkScrollStep          step,
 362                                              gint                   count);
 363 static void gtk_text_view_set_anchor       (GtkTextView           *text_view);
 364 static gboolean gtk_text_view_scroll_pages (GtkTextView           *text_view,
 365                                             gint                   count,
 366                                             gboolean               extend_selection);
 367 static gboolean gtk_text_view_scroll_hpages(GtkTextView           *text_view,
 368                                             gint                   count,
 369                                             gboolean               extend_selection);
 370 static void gtk_text_view_insert_at_cursor (GtkTextView           *text_view,
 371                                             const gchar           *str);
 372 static void gtk_text_view_delete_from_cursor (GtkTextView           *text_view,
 373                                               GtkDeleteType          type,
 374                                               gint                   count);
 375 static void gtk_text_view_backspace        (GtkTextView           *text_view);
 376 static void gtk_text_view_cut_clipboard    (GtkTextView           *text_view);
 377 static void gtk_text_view_copy_clipboard   (GtkTextView           *text_view);
 378 static void gtk_text_view_paste_clipboard  (GtkTextView           *text_view);
 379 static void gtk_text_view_toggle_overwrite (GtkTextView           *text_view);
 380 static void gtk_text_view_toggle_cursor_visible (GtkTextView      *text_view);
 381 static void gtk_text_view_compat_move_focus(GtkTextView           *text_view,
 382                                             GtkDirectionType       direction_type);
 383 static void gtk_text_view_unselect         (GtkTextView           *text_view);
 384
 385 static void     gtk_text_view_validate_onscreen     (GtkTextView        *text_view);
 386 static void     gtk_text_view_get_first_para_iter   (GtkTextView        *text_view,
 387                                                      GtkTextIter        *iter);
 388 static void     gtk_text_view_update_layout_width       (GtkTextView        *text_view);
 389 static void     gtk_text_view_set_attributes_from_style (GtkTextView        *text_view,
 390                                                          GtkTextAttributes *values,
 391                                                          GtkStyle           *style);
 392 static void     gtk_text_view_ensure_layout          (GtkTextView        *text_view);
 393 static void     gtk_text_view_destroy_layout         (GtkTextView        *text_view);
 394 static void     gtk_text_view_check_keymap_direction (GtkTextView        *text_view);
 395 static void     gtk_text_view_start_selection_drag   (GtkTextView        *text_view,
 396                                                       const GtkTextIter  *iter,
 397                                                       GdkEventButton     *event);
 398 static gboolean gtk_text_view_end_selection_drag     (GtkTextView        *text_view);
 399 static void     gtk_text_view_start_selection_dnd    (GtkTextView        *text_view,
 400                                                       const GtkTextIter  *iter,
 401                                                       GdkEventMotion     *event);
 402 static void     gtk_text_view_check_cursor_blink     (GtkTextView        *text_view);
 403 static void     gtk_text_view_pend_cursor_blink      (GtkTextView        *text_view);
 404 static void     gtk_text_view_stop_cursor_blink      (GtkTextView        *text_view);
 405 static void     gtk_text_view_reset_blink_time       (GtkTextView        *text_view);
 406
 407 static void     gtk_text_view_value_changed                (GtkAdjustment *adj,
 408                                                             GtkTextView   *view);
 409 static void     gtk_text_view_commit_handler               (GtkIMContext  *context,
 410                                                             const gchar   *str,
 411                                                             GtkTextView   *text_view);
 412 static void     gtk_text_view_commit_text                  (GtkTextView   *text_view,
 413                                                             const gchar   *text);
 414 static void     gtk_text_view_preedit_changed_handler      (GtkIMContext  *context,
 415                                                             GtkTextView   *text_view);
 416 static gboolean gtk_text_view_retrieve_surrounding_handler (GtkIMContext  *context,
 417                                                             GtkTextView   *text_view);
 418 static gboolean gtk_text_view_delete_surrounding_handler   (GtkIMContext  *context,
 419                                                             gint           offset,
 420                                                             gint           n_chars,
 421                                                             GtkTextView   *text_view);
 422
 423 static void gtk_text_view_mark_set_handler       (GtkTextBuffer     *buffer,
 424                                                   const GtkTextIter *location,
 425                                                   GtkTextMark       *mark,
 426                                                   gpointer           data);
 427 static void gtk_text_view_target_list_notify     (GtkTextBuffer     *buffer,
 428                                                   const GParamSpec  *pspec,
 429                                                   gpointer           data);
 430 static void gtk_text_view_paste_done_handler     (GtkTextBuffer     *buffer,
 431                                                   GtkClipboard      *clipboard,
 432                                                   gpointer           data);
 433 static void gtk_text_view_get_cursor_location    (GtkTextView       *text_view,
 434                                                   GdkRectangle      *pos);
 435 static void gtk_text_view_get_virtual_cursor_pos (GtkTextView       *text_view,
 436                                                   GtkTextIter       *cursor,
 437                                                   gint              *x,
 438                                                   gint              *y);
 439 static void gtk_text_view_set_virtual_cursor_pos (GtkTextView       *text_view,
 440                                                   gint               x,
 441                                                   gint               y);
 442
 443 static GtkAdjustment* get_hadjustment            (GtkTextView       *text_view);
 444 static GtkAdjustment* get_vadjustment            (GtkTextView       *text_view);
 445
 446 static void gtk_text_view_do_popup               (GtkTextView       *text_view,
 447                                                   GdkEventButton    *event);
 448
 449 static void cancel_pending_scroll                (GtkTextView   *text_view);
 450 static void gtk_text_view_queue_scroll           (GtkTextView   *text_view,
 451                                                   GtkTextMark   *mark,
 452                                                   gdouble        within_margin,
 453                                                   gboolean       use_align,
 454                                                   gdouble        xalign,
 455                                                   gdouble        yalign);
 456
 457 static gboolean gtk_text_view_flush_scroll         (GtkTextView *text_view);
 458 static void     gtk_text_view_update_adjustments   (GtkTextView *text_view);
 459 static void     gtk_text_view_invalidate           (GtkTextView *text_view);
 460 static void     gtk_text_view_flush_first_validate (GtkTextView *text_view);
 461
 462 static void gtk_text_view_update_im_spot_location (GtkTextView *text_view);
 463
 464 /* Container methods */
 465 static void gtk_text_view_add    (GtkContainer *container,
 466                                   GtkWidget    *child);
 467 static void gtk_text_view_remove (GtkContainer *container,
 468                                   GtkWidget    *child);
 469 static void gtk_text_view_forall (GtkContainer *container,
 470                                   gboolean      include_internals,
 471                                   GtkCallback   callback,
 472                                   gpointer      callback_data);
 473
 474 /* FIXME probably need the focus methods. */
 475
 476 typedef struct _GtkTextViewChild GtkTextViewChild;
 477
 478 struct _GtkTextViewChild
 479 {
 480   GtkWidget *widget;
 481
 482   GtkTextChildAnchor *anchor;
 483
 484   gint from_top_of_line;
 485   gint from_left_of_buffer;
 486
 487   /* These are ignored if anchor != NULL */
 488   GtkTextWindowType type;
 489   gint x;
 490   gint y;
 491 };
 492
 493 static GtkTextViewChild* text_view_child_new_anchored      (GtkWidget          *child,
 494                                                             GtkTextChildAnchor *anchor,
 495                                                             GtkTextLayout      *layout);
 496 static GtkTextViewChild* text_view_child_new_window        (GtkWidget          *child,
 497                                                             GtkTextWindowType   type,
 498                                                             gint                x,
 499                                                             gint                y);
 500 static void              text_view_child_free              (GtkTextViewChild   *child);
 501 static void              text_view_child_set_parent_window (GtkTextView        *text_view,
 502                                                             GtkTextViewChild   *child);
 503
 504 struct _GtkTextWindow
 505 {
 506   GtkTextWindowType type;
 507   GtkWidget *widget;
 508   GdkWindow *window;
 509   GdkWindow *bin_window;
 510   GtkRequisition requisition;
 511   GdkRectangle allocation;
 512 };
 513
 514 static GtkTextWindow *text_window_new             (GtkTextWindowType  type,
 515                                                    GtkWidget         *widget,
 516                                                    gint               width_request,
 517                                                    gint               height_request);
 518 static void           text_window_free            (GtkTextWindow     *win);
 519 static void           text_window_realize         (GtkTextWindow     *win,
 520                                                    GtkWidget         *widget);
 521 static void           text_window_unrealize       (GtkTextWindow     *win);
 522 static void           text_window_size_allocate   (GtkTextWindow     *win,
 523                                                    GdkRectangle      *rect);
 524 static void           text_window_scroll          (GtkTextWindow     *win,
 525                                                    gint               dx,
 526                                                    gint               dy);
 527 static void           text_window_invalidate_rect (GtkTextWindow     *win,
 528                                                    GdkRectangle      *rect);
 529 static void           text_window_invalidate_cursors (GtkTextWindow  *win);
 530
 531 static gint           text_window_get_width       (GtkTextWindow     *win);
 532 static gint           text_window_get_height      (GtkTextWindow     *win);
 533
 534
 535 static guint signals[LAST_SIGNAL] = { 0 };
 536
 537 G_DEFINE_TYPE (GtkTextView, gtk_text_view, GTK_TYPE_CONTAINER)
 538
 539 static void
 540 add_move_binding (GtkBindingSet  *binding_set,
 541                   guint           keyval,
 542                   guint           modmask,
 543                   GtkMovementStep step,
 544                   gint            count)
 545 {
 546   g_assert ((modmask & GDK_SHIFT_MASK) == 0);
 547
 548   gtk_binding_entry_add_signal (binding_set, keyval, modmask,
 549                                 "move-cursor", 3,
 550                                 G_TYPE_ENUM, step,
 551                                 G_TYPE_INT, count,
 552                                 G_TYPE_BOOLEAN, FALSE);
 553
 554   /* Selection-extending version */
 555   gtk_binding_entry_add_signal (binding_set, keyval, modmask | GDK_SHIFT_MASK,
 556                                 "move-cursor", 3,
 557                                 G_TYPE_ENUM, step,
 558                                 G_TYPE_INT, count,
 559                                 G_TYPE_BOOLEAN, TRUE);
 560 }
 561
 562 static void
 563 gtk_text_view_class_init (GtkTextViewClass *klass)
 564 {
 565   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 566   GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass);
 567   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 568   GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
 569   GtkBindingSet *binding_set;
 570
 571   /* Default handlers and virtual methods
 572    */
 573   gobject_class->set_property = gtk_text_view_set_property;
 574   gobject_class->get_property = gtk_text_view_get_property;
 575
 576   object_class->destroy = gtk_text_view_destroy;
 577   gobject_class->finalize = gtk_text_view_finalize;
 578
 579   widget_class->realize = gtk_text_view_realize;
 580   widget_class->unrealize = gtk_text_view_unrealize;
 581   widget_class->style_set = gtk_text_view_style_set;
 582   widget_class->direction_changed = gtk_text_view_direction_changed;
 583   widget_class->grab_notify = gtk_text_view_grab_notify;
 584   widget_class->state_changed = gtk_text_view_state_changed;
 585   widget_class->size_request = gtk_text_view_size_request;
 586   widget_class->size_allocate = gtk_text_view_size_allocate;
 587   widget_class->event = gtk_text_view_event;
 588   widget_class->key_press_event = gtk_text_view_key_press_event;
 589   widget_class->key_release_event = gtk_text_view_key_release_event;
 590   widget_class->button_press_event = gtk_text_view_button_press_event;
 591   widget_class->button_release_event = gtk_text_view_button_release_event;
 592   widget_class->focus_in_event = gtk_text_view_focus_in_event;
 593   widget_class->focus_out_event = gtk_text_view_focus_out_event;
 594   widget_class->motion_notify_event = gtk_text_view_motion_event;
 595   widget_class->expose_event = gtk_text_view_expose_event;
 596   widget_class->focus = gtk_text_view_focus;
 597
 598   /* need to override the base class function via override_class_handler,
 599    * because the signal slot is not available in GtkWidgetCLass
 600    */
 601   g_signal_override_class_handler ("move-focus",
 602                                    GTK_TYPE_TEXT_VIEW,
 603                                    G_CALLBACK (gtk_text_view_move_focus));
 604
 605   widget_class->drag_begin = gtk_text_view_drag_begin;
 606   widget_class->drag_end = gtk_text_view_drag_end;
 607   widget_class->drag_data_get = gtk_text_view_drag_data_get;
 608   widget_class->drag_data_delete = gtk_text_view_drag_data_delete;
 609
 610   widget_class->drag_leave = gtk_text_view_drag_leave;
 611   widget_class->drag_motion = gtk_text_view_drag_motion;
 612   widget_class->drag_drop = gtk_text_view_drag_drop;
 613   widget_class->drag_data_received = gtk_text_view_drag_data_received;
 614
 615   widget_class->popup_menu = gtk_text_view_popup_menu;
 616
 617   container_class->add = gtk_text_view_add;
 618   container_class->remove = gtk_text_view_remove;
 619   container_class->forall = gtk_text_view_forall;
 620
 621   klass->move_cursor = gtk_text_view_move_cursor;
 622   klass->set_anchor = gtk_text_view_set_anchor;
 623   klass->insert_at_cursor = gtk_text_view_insert_at_cursor;
 624   klass->delete_from_cursor = gtk_text_view_delete_from_cursor;
 625   klass->backspace = gtk_text_view_backspace;
 626   klass->cut_clipboard = gtk_text_view_cut_clipboard;
 627   klass->copy_clipboard = gtk_text_view_copy_clipboard;
 628   klass->paste_clipboard = gtk_text_view_paste_clipboard;
 629   klass->toggle_overwrite = gtk_text_view_toggle_overwrite;
 630   klass->move_focus = gtk_text_view_compat_move_focus;
 631   klass->set_scroll_adjustments = gtk_text_view_set_scroll_adjustments;
 632
 633   /*
 634    * Properties
 635    */
 636
 637   g_object_class_install_property (gobject_class,
 638                                    PROP_PIXELS_ABOVE_LINES,
 639                                    g_param_spec_int ("pixels-above-lines",
 640                                                      P_("Pixels Above Lines"),
 641                                                      P_("Pixels of blank space above paragraphs"),
 642                                                      0,
 643                                                      G_MAXINT,
 644                                                      0,
 645                                                      GTK_PARAM_READWRITE));
 646
 647   g_object_class_install_property (gobject_class,
 648                                    PROP_PIXELS_BELOW_LINES,
 649                                    g_param_spec_int ("pixels-below-lines",
 650                                                      P_("Pixels Below Lines"),
 651                                                      P_("Pixels of blank space below paragraphs"),
 652                                                      0,
 653                                                      G_MAXINT,
 654                                                      0,
 655                                                      GTK_PARAM_READWRITE));
 656
 657   g_object_class_install_property (gobject_class,
 658                                    PROP_PIXELS_INSIDE_WRAP,
 659                                    g_param_spec_int ("pixels-inside-wrap",
 660                                                      P_("Pixels Inside Wrap"),
 661                                                      P_("Pixels of blank space between wrapped lines in a paragraph"),
 662                                                      0,
 663                                                      G_MAXINT,
 664                                                      0,
 665                                                      GTK_PARAM_READWRITE));
 666
 667   g_object_class_install_property (gobject_class,
 668                                    PROP_EDITABLE,
 669                                    g_param_spec_boolean ("editable",
 670                                                          P_("Editable"),
 671                                                          P_("Whether the text can be modified by the user"),
 672                                                          TRUE,
 673                                                          GTK_PARAM_READWRITE));
 674
 675   g_object_class_install_property (gobject_class,
 676                                    PROP_WRAP_MODE,
 677                                    g_param_spec_enum ("wrap-mode",
 678                                                       P_("Wrap Mode"),
 679                                                       P_("Whether to wrap lines never, at word boundaries, or at character boundaries"),
 680                                                       GTK_TYPE_WRAP_MODE,
 681                                                       GTK_WRAP_NONE,
 682                                                       GTK_PARAM_READWRITE));
 683
 684   g_object_class_install_property (gobject_class,
 685                                    PROP_JUSTIFICATION,
 686                                    g_param_spec_enum ("justification",
 687                                                       P_("Justification"),
 688                                                       P_("Left, right, or center justification"),
 689                                                       GTK_TYPE_JUSTIFICATION,
 690                                                       GTK_JUSTIFY_LEFT,
 691                                                       GTK_PARAM_READWRITE));
 692
 693   g_object_class_install_property (gobject_class,
 694                                    PROP_LEFT_MARGIN,
 695                                    g_param_spec_int ("left-margin",
 696                                                      P_("Left Margin"),
 697                                                      P_("Width of the left margin in pixels"),
 698                                                      0,
 699                                                      G_MAXINT,
 700                                                      0,
 701                                                      GTK_PARAM_READWRITE));
 702
 703   g_object_class_install_property (gobject_class,
 704                                    PROP_RIGHT_MARGIN,
 705                                    g_param_spec_int ("right-margin",
 706                                                      P_("Right Margin"),
 707                                                      P_("Width of the right margin in pixels"),
 708                                                      0,
 709                                                      G_MAXINT,
 710                                                      0,
 711                                                      GTK_PARAM_READWRITE));
 712
 713   g_object_class_install_property (gobject_class,
 714                                    PROP_INDENT,
 715                                    g_param_spec_int ("indent",
 716                                                      P_("Indent"),
 717                                                      P_("Amount to indent the paragraph, in pixels"),
 718                                                      G_MININT,
 719                                                      G_MAXINT,
 720                                                      0,
 721                                                      GTK_PARAM_READWRITE));
 722
 723   g_object_class_install_property (gobject_class,
 724                                    PROP_TABS,
 725                                    g_param_spec_boxed ("tabs",
 726                                                        P_("Tabs"),
 727                                                        P_("Custom tabs for this text"),
 728                                                        PANGO_TYPE_TAB_ARRAY,
 729                                                        GTK_PARAM_READWRITE));
 730
 731   g_object_class_install_property (gobject_class,
 732                                    PROP_CURSOR_VISIBLE,
 733                                    g_param_spec_boolean ("cursor-visible",
 734                                                          P_("Cursor Visible"),
 735                                                          P_("If the insertion cursor is shown"),
 736                                                          TRUE,
 737                                                          GTK_PARAM_READWRITE));
 738
 739   g_object_class_install_property (gobject_class,
 740                                    PROP_BUFFER,
 741                                    g_param_spec_object ("buffer",
 742                                                         P_("Buffer"),
 743                                                         P_("The buffer which is displayed"),
 744                                                         GTK_TYPE_TEXT_BUFFER,
 745                                                         GTK_PARAM_READWRITE));
 746
 747   g_object_class_install_property (gobject_class,
 748                                    PROP_OVERWRITE,
 749                                    g_param_spec_boolean ("overwrite",
 750                                                          P_("Overwrite mode"),
 751                                                          P_("Whether entered text overwrites existing contents"),
 752                                                          FALSE,
 753                                                          GTK_PARAM_READWRITE));
 754
 755   g_object_class_install_property (gobject_class,
 756                                    PROP_ACCEPTS_TAB,
 757                                    g_param_spec_boolean ("accepts-tab",
 758                                                          P_("Accepts tab"),
 759                                                          P_("Whether Tab will result in a tab character being entered"),
 760                                                          TRUE,
 761                                                          GTK_PARAM_READWRITE));
 762
 763    /**
 764     * GtkTextView:im-module:
 765     *
 766     * Which IM (input method) module should be used for this entry.
 767     * See #GtkIMContext.
 768     *
 769     * Setting this to a non-%NULL value overrides the
 770     * system-wide IM module setting. See the GtkSettings
 771     * #GtkSettings:gtk-im-module property.
 772     *
 773     * Since: 2.16
 774     */
 775    g_object_class_install_property (gobject_class,
 776                                     PROP_IM_MODULE,
 777                                     g_param_spec_string ("im-module",
 778                                                          P_("IM module"),
 779                                                          P_("Which IM module should be used"),
 780                                                          NULL,
 781                                                          GTK_PARAM_READWRITE));
 782
 783   /*
 784    * Style properties
 785    */
 786   gtk_widget_class_install_style_property (widget_class,
 787                                            g_param_spec_boxed ("error-underline-color",
 788                                                                P_("Error underline color"),
 789                                                                P_("Color with which to draw error-indication underlines"),
 790                                                                GDK_TYPE_COLOR,
 791                                                                GTK_PARAM_READABLE));
 792
 793   /*
 794    * Signals
 795    */
 796
 797   /**
 798    * GtkTextView::move-cursor:
 799    * @text_view: the object which received the signal
 800    * @step: the granularity of the move, as a #GtkMovementStep
 801    * @count: the number of @step units to move
 802    * @extend_selection: %TRUE if the move should extend the selection
 803    *
 804    * The ::move-cursor signal is a
 805    * <link linkend="keybinding-signals">keybinding signal</link>
 806    * which gets emitted when the user initiates a cursor movement.
 807    * If the cursor is not visible in @text_view, this signal causes
 808    * the viewport to be moved instead.
 809    *
 810    * Applications should not connect to it, but may emit it with
 811    * g_signal_emit_by_name() if they need to control the cursor
 812    * programmatically.
 813    *
 814    * The default bindings for this signal come in two variants,
 815    * the variant with the Shift modifier extends the selection,
 816    * the variant without the Shift modifer does not.
 817    * There are too many key combinations to list them all here.
 818    * <itemizedlist>
 819    * <listitem>Arrow keys move by individual characters/lines</listitem>
 820    * <listitem>Ctrl-arrow key combinations move by words/paragraphs</listitem>
 821    * <listitem>Home/End keys move to the ends of the buffer</listitem>
 822    * <listitem>PageUp/PageDown keys move vertically by pages</listitem>
 823    * <listitem>Ctrl-PageUp/PageDown keys move horizontally by pages</listitem>
 824    * </itemizedlist>
 825    */
 826   signals[MOVE_CURSOR] =
 827     g_signal_new (I_("move-cursor"),
 828                   G_OBJECT_CLASS_TYPE (gobject_class),
 829                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 830                   G_STRUCT_OFFSET (GtkTextViewClass, move_cursor),
 831                   NULL, NULL,
 832                   _gtk_marshal_VOID__ENUM_INT_BOOLEAN,
 833                   G_TYPE_NONE, 3,
 834                   GTK_TYPE_MOVEMENT_STEP,
 835                   G_TYPE_INT,
 836                   G_TYPE_BOOLEAN);
 837
 838   /**
 839    * GtkTextView::move-viewport:
 840    * @text_view: the object which received the signal
 841    * @step: the granularity of the move, as a #GtkMovementStep
 842    * @count: the number of @step units to move
 843    *
 844    * The ::move-viewport signal is a
 845    * <link linkend="keybinding-signals">keybinding signal</link>
 846    * which can be bound to key combinations to allow the user
 847    * to move the viewport, i.e. change what part of the text view
 848    * is visible in a containing scrolled window.
 849    *
 850    * There are no default bindings for this signal.
 851    */
 852   signals[MOVE_VIEWPORT] =
 853     g_signal_new_class_handler (I_("move-viewport"),
 854                                 G_OBJECT_CLASS_TYPE (gobject_class),
 855                                 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 856                                 G_CALLBACK (gtk_text_view_move_viewport),
 857                                 NULL, NULL,
 858                                 _gtk_marshal_VOID__ENUM_INT,
 859                                 G_TYPE_NONE, 2,
 860                                 GTK_TYPE_SCROLL_STEP,
 861                                 G_TYPE_INT);
 862
 863   /**
 864    * GtkTextView::set-anchor:
 865    * @text_view: the object which received the signal
 866    *
 867    * The ::set-anchor signal is a
 868    * <link linkend="keybinding-signals">keybinding signal</link>
 869    * which gets emitted when the user initiates setting the "anchor"
 870    * mark. The "anchor" mark gets placed at the same position as the
 871    * "insert" mark.
 872    *
 873    * This signal has no default bindings.
 874    */
 875   signals[SET_ANCHOR] =
 876     g_signal_new (I_("set-anchor"),
 877                   G_OBJECT_CLASS_TYPE (gobject_class),
 878                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 879                   G_STRUCT_OFFSET (GtkTextViewClass, set_anchor),
 880                   NULL, NULL,
 881                   _gtk_marshal_VOID__VOID,
 882                   G_TYPE_NONE, 0);
 883
 884   /**
 885    * GtkTextView::insert-at-cursor:
 886    * @text_view: the object which received the signal
 887    * @string: the string to insert
 888    *
 889    * The ::insert-at-cursor signal is a
 890    * <link linkend="keybinding-signals">keybinding signal</link>
 891    * which gets emitted when the user initiates the insertion of a
 892    * fixed string at the cursor.
 893    *
 894    * This signal has no default bindings.
 895    */
 896   signals[INSERT_AT_CURSOR] =
 897     g_signal_new (I_("insert-at-cursor"),
 898                   G_OBJECT_CLASS_TYPE (gobject_class),
 899                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 900                   G_STRUCT_OFFSET (GtkTextViewClass, insert_at_cursor),
 901                   NULL, NULL,
 902                   _gtk_marshal_VOID__STRING,
 903                   G_TYPE_NONE, 1,
 904                   G_TYPE_STRING);
 905
 906   /**
 907    * GtkTextView::delete-from-cursor:
 908    * @text_view: the object which received the signal
 909    * @type: the granularity of the deletion, as a #GtkDeleteType
 910    * @count: the number of @type units to delete
 911    *
 912    * The ::delete-from-cursor signal is a
 913    * <link linkend="keybinding-signals">keybinding signal</link>
 914    * which gets emitted when the user initiates a text deletion.
 915    *
 916    * If the @type is %GTK_DELETE_CHARS, GTK+ deletes the selection
 917    * if there is one, otherwise it deletes the requested number
 918    * of characters.
 919    *
 920    * The default bindings for this signal are
 921    * Delete for deleting a character, Ctrl-Delete for
 922    * deleting a word and Ctrl-Backspace for deleting a word
 923    * backwords.
 924    */
 925   signals[DELETE_FROM_CURSOR] =
 926     g_signal_new (I_("delete-from-cursor"),
 927                   G_OBJECT_CLASS_TYPE (gobject_class),
 928                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 929                   G_STRUCT_OFFSET (GtkTextViewClass, delete_from_cursor),
 930                   NULL, NULL,
 931                   _gtk_marshal_VOID__ENUM_INT,
 932                   G_TYPE_NONE, 2,
 933                   GTK_TYPE_DELETE_TYPE,
 934                   G_TYPE_INT);
 935
 936   /**
 937    * GtkTextView::backspace:
 938    * @text_view: the object which received the signal
 939    *
 940    * The ::backspace signal is a
 941    * <link linkend="keybinding-signals">keybinding signal</link>
 942    * which gets emitted when the user asks for it.
 943    *
 944    * The default bindings for this signal are
 945    * Backspace and Shift-Backspace.
 946    */
 947   signals[BACKSPACE] =
 948     g_signal_new (I_("backspace"),
 949                   G_OBJECT_CLASS_TYPE (gobject_class),
 950                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 951                   G_STRUCT_OFFSET (GtkTextViewClass, backspace),
 952                   NULL, NULL,
 953                   _gtk_marshal_VOID__VOID,
 954                   G_TYPE_NONE, 0);
 955
 956   /**
 957    * GtkTextView::cut-clipboard:
 958    * @text_view: the object which received the signal
 959    *
 960    * The ::cut-clipboard signal is a
 961    * <link linkend="keybinding-signals">keybinding signal</link>
 962    * which gets emitted to cut the selection to the clipboard.
 963    *
 964    * The default bindings for this signal are
 965    * Ctrl-x and Shift-Delete.
 966    */
 967   signals[CUT_CLIPBOARD] =
 968     g_signal_new (I_("cut-clipboard"),
 969                   G_OBJECT_CLASS_TYPE (gobject_class),
 970                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 971                   G_STRUCT_OFFSET (GtkTextViewClass, cut_clipboard),
 972                   NULL, NULL,
 973                   _gtk_marshal_VOID__VOID,
 974                   G_TYPE_NONE, 0);
 975
 976   /**
 977    * GtkTextView::copy-clipboard:
 978    * @text_view: the object which received the signal
 979    *
 980    * The ::copy-clipboard signal is a
 981    * <link linkend="keybinding-signals">keybinding signal</link>
 982    * which gets emitted to copy the selection to the clipboard.
 983    *
 984    * The default bindings for this signal are
 985    * Ctrl-c and Ctrl-Insert.
 986    */
 987   signals[COPY_CLIPBOARD] =
 988     g_signal_new (I_("copy-clipboard"),
 989                   G_OBJECT_CLASS_TYPE (gobject_class),
 990                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 991                   G_STRUCT_OFFSET (GtkTextViewClass, copy_clipboard),
 992                   NULL, NULL,
 993                   _gtk_marshal_VOID__VOID,
 994                   G_TYPE_NONE, 0);
 995
 996   /**
 997    * GtkTextView::paste-clipboard:
 998    * @text_view: the object which received the signal
 999    *
1000    * The ::paste-clipboard signal is a
1001    * <link linkend="keybinding-signals">keybinding signal</link>
1002    * which gets emitted to paste the contents of the clipboard
1003    * into the text view.
1004    *
1005    * The default bindings for this signal are
1006    * Ctrl-v and Shift-Insert.
1007    */
1008   signals[PASTE_CLIPBOARD] =
1009     g_signal_new (I_("paste-clipboard"),
1010                   G_OBJECT_CLASS_TYPE (gobject_class),
1011                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1012                   G_STRUCT_OFFSET (GtkTextViewClass, paste_clipboard),
1013                   NULL, NULL,
1014                   _gtk_marshal_VOID__VOID,
1015                   G_TYPE_NONE, 0);
1016
1017   /**
1018    * GtkTextView::toggle-overwrite:
1019    * @text_view: the object which received the signal
1020    *
1021    * The ::toggle-overwrite signal is a
1022    * <link linkend="keybinding-signals">keybinding signal</link>
1023    * which gets emitted to toggle the overwrite mode of the text view.
1024    *
1025    * The default bindings for this signal is Insert.
1026    */
1027   signals[TOGGLE_OVERWRITE] =
1028     g_signal_new (I_("toggle-overwrite"),
1029                   G_OBJECT_CLASS_TYPE (gobject_class),
1030                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1031                   G_STRUCT_OFFSET (GtkTextViewClass, toggle_overwrite),
1032                   NULL, NULL,
1033                   _gtk_marshal_VOID__VOID,
1034                   G_TYPE_NONE, 0);
1035
1036   /**
1037    * GtkTextView::set-scroll-adjustments
1038    * @horizontal: the horizontal #GtkAdjustment
1039    * @vertical: the vertical #GtkAdjustment
1040    *
1041    * Set the scroll adjustments for the text view. Usually scrolled containers
1042    * like #GtkScrolledWindow will emit this signal to connect two instances
1043    * of #GtkScrollbar to the scroll directions of the #GtkTextView.
1044    */
1045   signals[SET_SCROLL_ADJUSTMENTS] =
1046     g_signal_new (I_("set-scroll-adjustments"),
1047                   G_OBJECT_CLASS_TYPE (gobject_class),
1048                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1049                   G_STRUCT_OFFSET (GtkTextViewClass, set_scroll_adjustments),
1050                   NULL, NULL,
1051                   _gtk_marshal_VOID__OBJECT_OBJECT,
1052                   G_TYPE_NONE, 2,
1053                   GTK_TYPE_ADJUSTMENT,
1054                   GTK_TYPE_ADJUSTMENT);
1055   widget_class->set_scroll_adjustments_signal = signals[SET_SCROLL_ADJUSTMENTS];
1056
1057   /**
1058    * GtkTextView::populate-popup:
1059    * @entry: The text view on which the signal is emitted
1060    * @menu: the menu that is being populated
1061    *
1062    * The ::populate-popup signal gets emitted before showing the
1063    * context menu of the text view.
1064    *
1065    * If you need to add items to the context menu, connect
1066    * to this signal and append your menuitems to the @menu.
1067    */
1068   signals[POPULATE_POPUP] =
1069     g_signal_new (I_("populate-popup"),
1070                   G_OBJECT_CLASS_TYPE (gobject_class),
1071                   G_SIGNAL_RUN_LAST,
1072                   G_STRUCT_OFFSET (GtkTextViewClass, populate_popup),
1073                   NULL, NULL,
1074                   _gtk_marshal_VOID__OBJECT,
1075                   G_TYPE_NONE, 1,
1076                   GTK_TYPE_MENU);
1077
1078   /**
1079    * GtkTextView::select-all:
1080    * @text_view: the object which received the signal
1081    * @select: %TRUE to select, %FALSE to unselect
1082    *
1083    * The ::select-all signal is a
1084    * <link linkend="keybinding-signals">keybinding signal</link>
1085    * which gets emitted to select or unselect the complete
1086    * contents of the text view.
1087    *
1088    * The default bindings for this signal are Ctrl-a and Ctrl-/
1089    * for selecting and Shift-Ctrl-a and Ctrl-\ for unselecting.
1090    */
1091   signals[SELECT_ALL] =
1092     g_signal_new_class_handler (I_("select-all"),
1093                                 G_OBJECT_CLASS_TYPE (object_class),
1094                                 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1095                                 G_CALLBACK (gtk_text_view_select_all),
1096                                 NULL, NULL,
1097                                 _gtk_marshal_VOID__BOOLEAN,
1098                                 G_TYPE_NONE, 1, G_TYPE_BOOLEAN);
1099
1100   /**
1101    * GtkTextView::toggle-cursor-visible:
1102    * @text_view: the object which received the signal
1103    *
1104    * The ::toggle-cursor-visible signal is a
1105    * <link linkend="keybinding-signals">keybinding signal</link>
1106    * which gets emitted to toggle the visibility of the cursor.
1107    *
1108    * The default binding for this signal is F7.
1109    */
1110   signals[TOGGLE_CURSOR_VISIBLE] =
1111     g_signal_new_class_handler (I_("toggle-cursor-visible"),
1112                                 G_OBJECT_CLASS_TYPE (object_class),
1113                                 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1114                                 G_CALLBACK (gtk_text_view_toggle_cursor_visible),
1115                                 NULL, NULL,
1116                                 _gtk_marshal_VOID__VOID,
1117                                 G_TYPE_NONE, 0);
1118
1119   /**
1120    * GtkTextView::preedit-changed:
1121    * @text_view: the object which received the signal
1122    * @preedit: the current preedit string
1123    *
1124    * If an input method is used, the typed text will not immediately
1125    * be committed to the buffer. So if you are interested in the text,
1126    * connect to this signal.
1127    *
1128    * This signal is only emitted if the text at the given position
1129    * is actually editable.
1130    *
1131    * Since: 2.20
1132    */
1133   signals[PREEDIT_CHANGED] =
1134     g_signal_new_class_handler (I_("preedit-changed"),
1135                                 G_OBJECT_CLASS_TYPE (object_class),
1136                                 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1137                                 NULL,
1138                                 NULL, NULL,
1139                                 _gtk_marshal_VOID__STRING,
1140                                 G_TYPE_NONE, 1,
1141                                 G_TYPE_STRING);
1142
1143   /*
1144    * Key bindings
1145    */
1146
1147   binding_set = gtk_binding_set_by_class (klass);
1148
1149   /* Moving the insertion point */
1150   add_move_binding (binding_set, GDK_KEY_Right, 0,
1151                     GTK_MOVEMENT_VISUAL_POSITIONS, 1);
1152
1153   add_move_binding (binding_set, GDK_KEY_KP_Right, 0,
1154                     GTK_MOVEMENT_VISUAL_POSITIONS, 1);
1155
1156   add_move_binding (binding_set, GDK_KEY_Left, 0,
1157                     GTK_MOVEMENT_VISUAL_POSITIONS, -1);
1158
1159   add_move_binding (binding_set, GDK_KEY_KP_Left, 0,
1160                     GTK_MOVEMENT_VISUAL_POSITIONS, -1);
1161
1162   add_move_binding (binding_set, GDK_KEY_Right, GDK_CONTROL_MASK,
1163                     GTK_MOVEMENT_WORDS, 1);
1164
1165   add_move_binding (binding_set, GDK_KEY_KP_Right, GDK_CONTROL_MASK,
1166                     GTK_MOVEMENT_WORDS, 1);
1167
1168   add_move_binding (binding_set, GDK_KEY_Left, GDK_CONTROL_MASK,
1169                     GTK_MOVEMENT_WORDS, -1);
1170
1171   add_move_binding (binding_set, GDK_KEY_KP_Left, GDK_CONTROL_MASK,
1172                     GTK_MOVEMENT_WORDS, -1);
1173
1174   add_move_binding (binding_set, GDK_KEY_Up, 0,
1175                     GTK_MOVEMENT_DISPLAY_LINES, -1);
1176
1177   add_move_binding (binding_set, GDK_KEY_KP_Up, 0,
1178                     GTK_MOVEMENT_DISPLAY_LINES, -1);
1179
1180   add_move_binding (binding_set, GDK_KEY_Down, 0,
1181                     GTK_MOVEMENT_DISPLAY_LINES, 1);
1182
1183   add_move_binding (binding_set, GDK_KEY_KP_Down, 0,
1184                     GTK_MOVEMENT_DISPLAY_LINES, 1);
1185
1186   add_move_binding (binding_set, GDK_KEY_Up, GDK_CONTROL_MASK,
1187                     GTK_MOVEMENT_PARAGRAPHS, -1);
1188
1189   add_move_binding (binding_set, GDK_KEY_KP_Up, GDK_CONTROL_MASK,
1190                     GTK_MOVEMENT_PARAGRAPHS, -1);
1191
1192   add_move_binding (binding_set, GDK_KEY_Down, GDK_CONTROL_MASK,
1193                     GTK_MOVEMENT_PARAGRAPHS, 1);
1194
1195   add_move_binding (binding_set, GDK_KEY_KP_Down, GDK_CONTROL_MASK,
1196                     GTK_MOVEMENT_PARAGRAPHS, 1);
1197
1198   add_move_binding (binding_set, GDK_KEY_Home, 0,
1199                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
1200
1201   add_move_binding (binding_set, GDK_KEY_KP_Home, 0,
1202                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
1203
1204   add_move_binding (binding_set, GDK_KEY_End, 0,
1205                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
1206
1207   add_move_binding (binding_set, GDK_KEY_KP_End, 0,
1208                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
1209
1210   add_move_binding (binding_set, GDK_KEY_Home, GDK_CONTROL_MASK,
1211                     GTK_MOVEMENT_BUFFER_ENDS, -1);
1212
1213   add_move_binding (binding_set, GDK_KEY_KP_Home, GDK_CONTROL_MASK,
1214                     GTK_MOVEMENT_BUFFER_ENDS, -1);
1215
1216   add_move_binding (binding_set, GDK_KEY_End, GDK_CONTROL_MASK,
1217                     GTK_MOVEMENT_BUFFER_ENDS, 1);
1218
1219   add_move_binding (binding_set, GDK_KEY_KP_End, GDK_CONTROL_MASK,
1220                     GTK_MOVEMENT_BUFFER_ENDS, 1);
1221
1222   add_move_binding (binding_set, GDK_KEY_Page_Up, 0,
1223                     GTK_MOVEMENT_PAGES, -1);
1224
1225   add_move_binding (binding_set, GDK_KEY_KP_Page_Up, 0,
1226                     GTK_MOVEMENT_PAGES, -1);
1227
1228   add_move_binding (binding_set, GDK_KEY_Page_Down, 0,
1229                     GTK_MOVEMENT_PAGES, 1);
1230
1231   add_move_binding (binding_set, GDK_KEY_KP_Page_Down, 0,
1232                     GTK_MOVEMENT_PAGES, 1);
1233
1234   add_move_binding (binding_set, GDK_KEY_Page_Up, GDK_CONTROL_MASK,
1235                     GTK_MOVEMENT_HORIZONTAL_PAGES, -1);
1236
1237   add_move_binding (binding_set, GDK_KEY_KP_Page_Up, GDK_CONTROL_MASK,
1238                     GTK_MOVEMENT_HORIZONTAL_PAGES, -1);
1239
1240   add_move_binding (binding_set, GDK_KEY_Page_Down, GDK_CONTROL_MASK,
1241                     GTK_MOVEMENT_HORIZONTAL_PAGES, 1);
1242
1243   add_move_binding (binding_set, GDK_KEY_KP_Page_Down, GDK_CONTROL_MASK,
1244                     GTK_MOVEMENT_HORIZONTAL_PAGES, 1);
1245
1246   /* Select all */
1247   gtk_binding_entry_add_signal (binding_set, GDK_KEY_a, GDK_CONTROL_MASK,
1248                                 "select-all", 1,
1249                                 G_TYPE_BOOLEAN, TRUE);
1250
1251   gtk_binding_entry_add_signal (binding_set, GDK_KEY_slash, GDK_CONTROL_MASK,
1252                                 "select-all", 1,
1253                                 G_TYPE_BOOLEAN, TRUE);
1254
1255   /* Unselect all */
1256   gtk_binding_entry_add_signal (binding_set, GDK_KEY_backslash, GDK_CONTROL_MASK,
1257                                  "select-all", 1,
1258                                  G_TYPE_BOOLEAN, FALSE);
1259
1260   gtk_binding_entry_add_signal (binding_set, GDK_KEY_a, GDK_SHIFT_MASK | GDK_CONTROL_MASK,
1261                                  "select-all", 1,
1262                                  G_TYPE_BOOLEAN, FALSE);
1263
1264   /* Deleting text */
1265   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Delete, 0,
1266                                 "delete-from-cursor", 2,
1267                                 G_TYPE_ENUM, GTK_DELETE_CHARS,
1268                                 G_TYPE_INT, 1);
1269
1270   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Delete, 0,
1271                                 "delete-from-cursor", 2,
1272                                 G_TYPE_ENUM, GTK_DELETE_CHARS,
1273                                 G_TYPE_INT, 1);
1274
1275   gtk_binding_entry_add_signal (binding_set, GDK_KEY_BackSpace, 0,
1276                                 "backspace", 0);
1277
1278   /* Make this do the same as Backspace, to help with mis-typing */
1279   gtk_binding_entry_add_signal (binding_set, GDK_KEY_BackSpace, GDK_SHIFT_MASK,
1280                                 "backspace", 0);
1281
1282   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Delete, GDK_CONTROL_MASK,
1283                                 "delete-from-cursor", 2,
1284                                 G_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
1285                                 G_TYPE_INT, 1);
1286
1287   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Delete, GDK_CONTROL_MASK,
1288                                 "delete-from-cursor", 2,
1289                                 G_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
1290                                 G_TYPE_INT, 1);
1291
1292   gtk_binding_entry_add_signal (binding_set, GDK_KEY_BackSpace, GDK_CONTROL_MASK,
1293                                 "delete-from-cursor", 2,
1294                                 G_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
1295                                 G_TYPE_INT, -1);
1296
1297   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Delete, GDK_SHIFT_MASK | GDK_CONTROL_MASK,
1298                                 "delete-from-cursor", 2,
1299                                 G_TYPE_ENUM, GTK_DELETE_PARAGRAPH_ENDS,
1300                                 G_TYPE_INT, 1);
1301
1302   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Delete, GDK_SHIFT_MASK | GDK_CONTROL_MASK,
1303                                 "delete-from-cursor", 2,
1304                                 G_TYPE_ENUM, GTK_DELETE_PARAGRAPH_ENDS,
1305                                 G_TYPE_INT, 1);
1306
1307   gtk_binding_entry_add_signal (binding_set, GDK_KEY_BackSpace, GDK_SHIFT_MASK | GDK_CONTROL_MASK,
1308                                 "delete-from-cursor", 2,
1309                                 G_TYPE_ENUM, GTK_DELETE_PARAGRAPH_ENDS,
1310                                 G_TYPE_INT, -1);
1311
1312   /* Cut/copy/paste */
1313
1314   gtk_binding_entry_add_signal (binding_set, GDK_KEY_x, GDK_CONTROL_MASK,
1315                                 "cut-clipboard", 0);
1316   gtk_binding_entry_add_signal (binding_set, GDK_KEY_c, GDK_CONTROL_MASK,
1317                                 "copy-clipboard", 0);
1318   gtk_binding_entry_add_signal (binding_set, GDK_KEY_v, GDK_CONTROL_MASK,
1319                                 "paste-clipboard", 0);
1320
1321   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Delete, GDK_SHIFT_MASK,
1322                                 "cut-clipboard", 0);
1323   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Insert, GDK_CONTROL_MASK,
1324                                 "copy-clipboard", 0);
1325   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Insert, GDK_SHIFT_MASK,
1326                                 "paste-clipboard", 0);
1327
1328   /* Overwrite */
1329   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Insert, 0,
1330                                 "toggle-overwrite", 0);
1331   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Insert, 0,
1332                                 "toggle-overwrite", 0);
1333
1334   /* Caret mode */
1335   gtk_binding_entry_add_signal (binding_set, GDK_KEY_F7, 0,
1336                                 "toggle-cursor-visible", 0);
1337
1338   /* Control-tab focus motion */
1339   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Tab, GDK_CONTROL_MASK,
1340                                 "move-focus", 1,
1341                                 GTK_TYPE_DIRECTION_TYPE, GTK_DIR_TAB_FORWARD);
1342   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Tab, GDK_CONTROL_MASK,
1343                                 "move-focus", 1,
1344                                 GTK_TYPE_DIRECTION_TYPE, GTK_DIR_TAB_FORWARD);
1345
1346   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Tab, GDK_SHIFT_MASK | GDK_CONTROL_MASK,
1347                                 "move-focus", 1,
1348                                 GTK_TYPE_DIRECTION_TYPE, GTK_DIR_TAB_BACKWARD);
1349   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Tab, GDK_SHIFT_MASK | GDK_CONTROL_MASK,
1350                                 "move-focus", 1,
1351                                 GTK_TYPE_DIRECTION_TYPE, GTK_DIR_TAB_BACKWARD);
1352
1353   g_type_class_add_private (gobject_class, sizeof (GtkTextViewPrivate));
1354 }
1355
1356 static void
1357 gtk_text_view_init (GtkTextView *text_view)
1358 {
1359   GtkWidget *widget = GTK_WIDGET (text_view);
1360   GtkTargetList *target_list;
1361   GtkTextViewPrivate *priv;
1362
1363   text_view->priv = GTK_TEXT_VIEW_GET_PRIVATE (text_view);
1364   priv = text_view->priv;
1365
1366   gtk_widget_set_can_focus (widget, TRUE);
1367
1368   /* Set up default style */
1369   priv->wrap_mode = GTK_WRAP_NONE;
1370   priv->pixels_above_lines = 0;
1371   priv->pixels_below_lines = 0;
1372   priv->pixels_inside_wrap = 0;
1373   priv->justify = GTK_JUSTIFY_LEFT;
1374   priv->left_margin = 0;
1375   priv->right_margin = 0;
1376   priv->indent = 0;
1377   priv->tabs = NULL;
1378   priv->editable = TRUE;
1379
1380   priv->scroll_after_paste = TRUE;
1381
1382   gtk_drag_dest_set (widget, 0, NULL, 0,
1383                      GDK_ACTION_COPY | GDK_ACTION_MOVE);
1384
1385   target_list = gtk_target_list_new (NULL, 0);
1386   gtk_drag_dest_set_target_list (widget, target_list);
1387   gtk_target_list_unref (target_list);
1388
1389   priv->virtual_cursor_x = -1;
1390   priv->virtual_cursor_y = -1;
1391
1392   /* This object is completely private. No external entity can gain a reference
1393    * to it; so we create it here and destroy it in finalize ().
1394    */
1395   priv->im_context = gtk_im_multicontext_new ();
1396
1397   g_signal_connect (priv->im_context, "commit",
1398                     G_CALLBACK (gtk_text_view_commit_handler), text_view);
1399   g_signal_connect (priv->im_context, "preedit-changed",
1400                     G_CALLBACK (gtk_text_view_preedit_changed_handler), text_view);
1401   g_signal_connect (priv->im_context, "retrieve-surrounding",
1402                     G_CALLBACK (gtk_text_view_retrieve_surrounding_handler), text_view);
1403   g_signal_connect (priv->im_context, "delete-surrounding",
1404                     G_CALLBACK (gtk_text_view_delete_surrounding_handler), text_view);
1405
1406   priv->cursor_visible = TRUE;
1407
1408   priv->accepts_tab = TRUE;
1409
1410   priv->text_window = text_window_new (GTK_TEXT_WINDOW_TEXT,
1411                                        widget, 200, 200);
1412
1413   priv->drag_start_x = -1;
1414   priv->drag_start_y = -1;
1415
1416   priv->pending_place_cursor_button = 0;
1417
1418   /* We handle all our own redrawing */
1419   gtk_widget_set_redraw_on_allocate (widget, FALSE);
1420 }
1421
1422 /**
1423  * gtk_text_view_new:
1424  *
1425  * Creates a new #GtkTextView. If you don't call gtk_text_view_set_buffer()
1426  * before using the text view, an empty default buffer will be created
1427  * for you. Get the buffer with gtk_text_view_get_buffer(). If you want
1428  * to specify your own buffer, consider gtk_text_view_new_with_buffer().
1429  *
1430  * Return value: a new #GtkTextView
1431  **/
1432 GtkWidget*
1433 gtk_text_view_new (void)
1434 {
1435   return g_object_new (GTK_TYPE_TEXT_VIEW, NULL);
1436 }
1437
1438 /**
1439  * gtk_text_view_new_with_buffer:
1440  * @buffer: a #GtkTextBuffer
1441  *
1442  * Creates a new #GtkTextView widget displaying the buffer
1443  * @buffer. One buffer can be shared among many widgets.
1444  * @buffer may be %NULL to create a default buffer, in which case
1445  * this function is equivalent to gtk_text_view_new(). The
1446  * text view adds its own reference count to the buffer; it does not
1447  * take over an existing reference.
1448  *
1449  * Return value: a new #GtkTextView.
1450  **/
1451 GtkWidget*
1452 gtk_text_view_new_with_buffer (GtkTextBuffer *buffer)
1453 {
1454   GtkTextView *text_view;
1455
1456   text_view = (GtkTextView*)gtk_text_view_new ();
1457
1458   gtk_text_view_set_buffer (text_view, buffer);
1459
1460   return GTK_WIDGET (text_view);
1461 }
1462
1463 /**
1464  * gtk_text_view_set_buffer:
1465  * @text_view: a #GtkTextView
1466  * @buffer: (allow-none): a #GtkTextBuffer
1467  *
1468  * Sets @buffer as the buffer being displayed by @text_view. The previous
1469  * buffer displayed by the text view is unreferenced, and a reference is
1470  * added to @buffer. If you owned a reference to @buffer before passing it
1471  * to this function, you must remove that reference yourself; #GtkTextView
1472  * will not "adopt" it.
1473  **/
1474 void
1475 gtk_text_view_set_buffer (GtkTextView   *text_view,
1476                           GtkTextBuffer *buffer)
1477 {
1478   GtkTextViewPrivate *priv;
1479
1480   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1481   g_return_if_fail (buffer == NULL || GTK_IS_TEXT_BUFFER (buffer));
1482
1483   priv = text_view->priv;
1484
1485   if (priv->buffer == buffer)
1486     return;
1487
1488   if (priv->buffer != NULL)
1489     {
1490       /* Destroy all anchored children */
1491       GSList *tmp_list;
1492       GSList *copy;
1493
1494       copy = g_slist_copy (priv->children);
1495       tmp_list = copy;
1496       while (tmp_list != NULL)
1497         {
1498           GtkTextViewChild *vc = tmp_list->data;
1499
1500           if (vc->anchor)
1501             {
1502               gtk_widget_destroy (vc->widget);
1503               /* vc may now be invalid! */
1504             }
1505
1506           tmp_list = g_slist_next (tmp_list);
1507         }
1508
1509       g_slist_free (copy);
1510
1511       g_signal_handlers_disconnect_by_func (priv->buffer,
1512                                             gtk_text_view_mark_set_handler,
1513                                             text_view);
1514       g_signal_handlers_disconnect_by_func (priv->buffer,
1515                                             gtk_text_view_target_list_notify,
1516                                             text_view);
1517       g_signal_handlers_disconnect_by_func (priv->buffer,
1518                                             gtk_text_view_paste_done_handler,
1519                                             text_view);
1520
1521       if (gtk_widget_get_realized (GTK_WIDGET (text_view)))
1522         {
1523           GtkClipboard *clipboard = gtk_widget_get_clipboard (GTK_WIDGET (text_view),
1524                                                               GDK_SELECTION_PRIMARY);
1525           gtk_text_buffer_remove_selection_clipboard (priv->buffer, clipboard);
1526         }
1527
1528       if (priv->layout)
1529         gtk_text_layout_set_buffer (priv->layout, NULL);
1530
1531       g_object_unref (priv->buffer);
1532       priv->dnd_mark = NULL;
1533       priv->first_para_mark = NULL;
1534       cancel_pending_scroll (text_view);
1535     }
1536
1537   priv->buffer = buffer;
1538
1539   if (priv->layout)
1540     gtk_text_layout_set_buffer (priv->layout, buffer);
1541
1542   if (buffer != NULL)
1543     {
1544       GtkTextIter start;
1545
1546       g_object_ref (buffer);
1547
1548       gtk_text_buffer_get_iter_at_offset (priv->buffer, &start, 0);
1549
1550       priv->dnd_mark = gtk_text_buffer_create_mark (priv->buffer,
1551                                                     "gtk_drag_target",
1552                                                     &start, FALSE);
1553
1554       priv->first_para_mark = gtk_text_buffer_create_mark (priv->buffer,
1555                                                            NULL,
1556                                                            &start, TRUE);
1557
1558       priv->first_para_pixels = 0;
1559
1560
1561       g_signal_connect (priv->buffer, "mark-set",
1562                         G_CALLBACK (gtk_text_view_mark_set_handler),
1563                         text_view);
1564       g_signal_connect (priv->buffer, "notify::paste-target-list",
1565                         G_CALLBACK (gtk_text_view_target_list_notify),
1566                         text_view);
1567       g_signal_connect (priv->buffer, "paste-done",
1568                         G_CALLBACK (gtk_text_view_paste_done_handler),
1569                         text_view);
1570
1571       gtk_text_view_target_list_notify (priv->buffer, NULL, text_view);
1572
1573       if (gtk_widget_get_realized (GTK_WIDGET (text_view)))
1574         {
1575           GtkClipboard *clipboard = gtk_widget_get_clipboard (GTK_WIDGET (text_view),
1576                                                               GDK_SELECTION_PRIMARY);
1577           gtk_text_buffer_add_selection_clipboard (priv->buffer, clipboard);
1578         }
1579     }
1580
1581   g_object_notify (G_OBJECT (text_view), "buffer");
1582
1583   if (gtk_widget_get_visible (GTK_WIDGET (text_view)))
1584     gtk_widget_queue_draw (GTK_WIDGET (text_view));
1585
1586   DV(g_print ("Invalidating due to set_buffer\n"));
1587   gtk_text_view_invalidate (text_view);
1588 }
1589
1590 static GtkTextBuffer*
1591 get_buffer (GtkTextView *text_view)
1592 {
1593   if (text_view->priv->buffer == NULL)
1594     {
1595       GtkTextBuffer *b;
1596       b = gtk_text_buffer_new (NULL);
1597       gtk_text_view_set_buffer (text_view, b);
1598       g_object_unref (b);
1599     }
1600
1601   return text_view->priv->buffer;
1602 }
1603
1604 /**
1605  * gtk_text_view_get_buffer:
1606  * @text_view: a #GtkTextView
1607  *
1608  * Returns the #GtkTextBuffer being displayed by this text view.
1609  * The reference count on the buffer is not incremented; the caller
1610  * of this function won't own a new reference.
1611  *
1612  * Return value: (transfer none): a #GtkTextBuffer
1613  **/
1614 GtkTextBuffer*
1615 gtk_text_view_get_buffer (GtkTextView *text_view)
1616 {
1617   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
1618
1619   return get_buffer (text_view);
1620 }
1621
1622 /**
1623  * gtk_text_view_get_iter_at_location:
1624  * @text_view: a #GtkTextView
1625  * @iter: (out): a #GtkTextIter
1626  * @x: x position, in buffer coordinates
1627  * @y: y position, in buffer coordinates
1628  *
1629  * Retrieves the iterator at buffer coordinates @x and @y. Buffer
1630  * coordinates are coordinates for the entire buffer, not just the
1631  * currently-displayed portion.  If you have coordinates from an
1632  * event, you have to convert those to buffer coordinates with
1633  * gtk_text_view_window_to_buffer_coords().
1634  **/
1635 void
1636 gtk_text_view_get_iter_at_location (GtkTextView *text_view,
1637                                     GtkTextIter *iter,
1638                                     gint         x,
1639                                     gint         y)
1640 {
1641   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1642   g_return_if_fail (iter != NULL);
1643
1644   gtk_text_view_ensure_layout (text_view);
1645
1646   gtk_text_layout_get_iter_at_pixel (text_view->priv->layout,
1647                                      iter, x, y);
1648 }
1649
1650 /**
1651  * gtk_text_view_get_iter_at_position:
1652  * @text_view: a #GtkTextView
1653  * @iter: (out): a #GtkTextIter
1654  * @trailing: (out) (allow-none): if non-%NULL, location to store an integer indicating where
1655  *    in the grapheme the user clicked. It will either be
1656  *    zero, or the number of characters in the grapheme.
1657  *    0 represents the trailing edge of the grapheme.
1658  * @x: x position, in buffer coordinates
1659  * @y: y position, in buffer coordinates
1660  *
1661  * Retrieves the iterator pointing to the character at buffer
1662  * coordinates @x and @y. Buffer coordinates are coordinates for
1663  * the entire buffer, not just the currently-displayed portion.
1664  * If you have coordinates from an event, you have to convert
1665  * those to buffer coordinates with
1666  * gtk_text_view_window_to_buffer_coords().
1667  *
1668  * Note that this is different from gtk_text_view_get_iter_at_location(),
1669  * which returns cursor locations, i.e. positions <emphasis>between</emphasis>
1670  * characters.
1671  *
1672  * Since: 2.6
1673  **/
1674 void
1675 gtk_text_view_get_iter_at_position (GtkTextView *text_view,
1676                                     GtkTextIter *iter,
1677                                     gint        *trailing,
1678                                     gint         x,
1679                                     gint         y)
1680 {
1681   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1682   g_return_if_fail (iter != NULL);
1683
1684   gtk_text_view_ensure_layout (text_view);
1685
1686   gtk_text_layout_get_iter_at_position (text_view->priv->layout,
1687                                         iter, trailing, x, y);
1688 }
1689
1690 /**
1691  * gtk_text_view_get_iter_location:
1692  * @text_view: a #GtkTextView
1693  * @iter: a #GtkTextIter
1694  * @location: (out): bounds of the character at @iter
1695  *
1696  * Gets a rectangle which roughly contains the character at @iter.
1697  * The rectangle position is in buffer coordinates; use
1698  * gtk_text_view_buffer_to_window_coords() to convert these
1699  * coordinates to coordinates for one of the windows in the text view.
1700  **/
1701 void
1702 gtk_text_view_get_iter_location (GtkTextView       *text_view,
1703                                  const GtkTextIter *iter,
1704                                  GdkRectangle      *location)
1705 {
1706   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1707   g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
1708
1709   gtk_text_view_ensure_layout (text_view);
1710
1711   gtk_text_layout_get_iter_location (text_view->priv->layout, iter, location);
1712 }
1713
1714 /**
1715  * gtk_text_view_get_line_yrange:
1716  * @text_view: a #GtkTextView
1717  * @iter: a #GtkTextIter
1718  * @y: (out): return location for a y coordinate
1719  * @height: (out): return location for a height
1720  *
1721  * Gets the y coordinate of the top of the line containing @iter,
1722  * and the height of the line. The coordinate is a buffer coordinate;
1723  * convert to window coordinates with gtk_text_view_buffer_to_window_coords().
1724  **/
1725 void
1726 gtk_text_view_get_line_yrange (GtkTextView       *text_view,
1727                                const GtkTextIter *iter,
1728                                gint              *y,
1729                                gint              *height)
1730 {
1731   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1732   g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
1733
1734   gtk_text_view_ensure_layout (text_view);
1735
1736   gtk_text_layout_get_line_yrange (text_view->priv->layout,
1737                                    iter,
1738                                    y,
1739                                    height);
1740 }
1741
1742 /**
1743  * gtk_text_view_get_line_at_y:
1744  * @text_view: a #GtkTextView
1745  * @target_iter: (out): a #GtkTextIter
1746  * @y: a y coordinate
1747  * @line_top: (out): return location for top coordinate of the line
1748  *
1749  * Gets the #GtkTextIter at the start of the line containing
1750  * the coordinate @y. @y is in buffer coordinates, convert from
1751  * window coordinates with gtk_text_view_window_to_buffer_coords().
1752  * If non-%NULL, @line_top will be filled with the coordinate of the top
1753  * edge of the line.
1754  **/
1755 void
1756 gtk_text_view_get_line_at_y (GtkTextView *text_view,
1757                              GtkTextIter *target_iter,
1758                              gint         y,
1759                              gint        *line_top)
1760 {
1761   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1762
1763   gtk_text_view_ensure_layout (text_view);
1764
1765   gtk_text_layout_get_line_at_y (text_view->priv->layout,
1766                                  target_iter,
1767                                  y,
1768                                  line_top);
1769 }
1770
1771 static gboolean
1772 set_adjustment_clamped (GtkAdjustment *adj, gdouble val)
1773 {
1774   DV (g_print ("  Setting adj to raw value %g\n", val));
1775
1776   /* We don't really want to clamp to upper; we want to clamp to
1777      upper - page_size which is the highest value the scrollbar
1778      will let us reach. */
1779   if (val > (adj->upper - adj->page_size))
1780     val = adj->upper - adj->page_size;
1781
1782   if (val < adj->lower)
1783     val = adj->lower;
1784
1785   if (val != adj->value)
1786     {
1787       DV (g_print ("  Setting adj to clamped value %g\n", val));
1788       gtk_adjustment_set_value (adj, val);
1789       return TRUE;
1790     }
1791   else
1792     return FALSE;
1793 }
1794
1795 /**
1796  * gtk_text_view_scroll_to_iter:
1797  * @text_view: a #GtkTextView
1798  * @iter: a #GtkTextIter
1799  * @within_margin: margin as a [0.0,0.5) fraction of screen size
1800  * @use_align: whether to use alignment arguments (if %FALSE,
1801  *    just get the mark onscreen)
1802  * @xalign: horizontal alignment of mark within visible area
1803  * @yalign: vertical alignment of mark within visible area
1804  *
1805  * Scrolls @text_view so that @iter is on the screen in the position
1806  * indicated by @xalign and @yalign. An alignment of 0.0 indicates
1807  * left or top, 1.0 indicates right or bottom, 0.5 means center.
1808  * If @use_align is %FALSE, the text scrolls the minimal distance to
1809  * get the mark onscreen, possibly not scrolling at all. The effective
1810  * screen for purposes of this function is reduced by a margin of size
1811  * @within_margin.
1812  *
1813  * Note that this function uses the currently-computed height of the
1814  * lines in the text buffer. Line heights are computed in an idle
1815  * handler; so this function may not have the desired effect if it's
1816  * called before the height computations. To avoid oddness, consider
1817  * using gtk_text_view_scroll_to_mark() which saves a point to be
1818  * scrolled to after line validation.
1819  *
1820  * Return value: %TRUE if scrolling occurred
1821  **/
1822 gboolean
1823 gtk_text_view_scroll_to_iter (GtkTextView   *text_view,
1824                               GtkTextIter   *iter,
1825                               gdouble        within_margin,
1826                               gboolean       use_align,
1827                               gdouble        xalign,
1828                               gdouble        yalign)
1829 {
1830   GdkRectangle rect;
1831   GdkRectangle screen;
1832   gint screen_bottom;
1833   gint screen_right;
1834   gint scroll_dest;
1835   GtkWidget *widget;
1836   gboolean retval = FALSE;
1837   gint scroll_inc;
1838   gint screen_xoffset, screen_yoffset;
1839   gint current_x_scroll, current_y_scroll;
1840
1841   /* FIXME why don't we do the validate-at-scroll-destination thing
1842    * from flush_scroll in this function? I think it wasn't done before
1843    * because changed_handler was screwed up, but I could be wrong.
1844    */
1845
1846   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1847   g_return_val_if_fail (iter != NULL, FALSE);
1848   g_return_val_if_fail (within_margin >= 0.0 && within_margin < 0.5, FALSE);
1849   g_return_val_if_fail (xalign >= 0.0 && xalign <= 1.0, FALSE);
1850   g_return_val_if_fail (yalign >= 0.0 && yalign <= 1.0, FALSE);
1851
1852   widget = GTK_WIDGET (text_view);
1853
1854   DV(g_print(G_STRLOC"\n"));
1855
1856   gtk_text_layout_get_iter_location (text_view->priv->layout,
1857                                      iter,
1858                                      &rect);
1859
1860   DV (g_print (" target rect %d,%d  %d x %d\n", rect.x, rect.y, rect.width, rect.height));
1861
1862   current_x_scroll = text_view->priv->xoffset;
1863   current_y_scroll = text_view->priv->yoffset;
1864
1865   screen.x = current_x_scroll;
1866   screen.y = current_y_scroll;
1867   screen.width = SCREEN_WIDTH (widget);
1868   screen.height = SCREEN_HEIGHT (widget);
1869
1870   screen_xoffset = screen.width * within_margin;
1871   screen_yoffset = screen.height * within_margin;
1872
1873   screen.x += screen_xoffset;
1874   screen.y += screen_yoffset;
1875   screen.width -= screen_xoffset * 2;
1876   screen.height -= screen_yoffset * 2;
1877
1878   /* paranoia check */
1879   if (screen.width < 1)
1880     screen.width = 1;
1881   if (screen.height < 1)
1882     screen.height = 1;
1883
1884   /* The -1 here ensures that we leave enough space to draw the cursor
1885    * when this function is used for horizontal scrolling.
1886    */
1887   screen_right = screen.x + screen.width - 1;
1888   screen_bottom = screen.y + screen.height;
1889
1890   /* The alignment affects the point in the target character that we
1891    * choose to align. If we're doing right/bottom alignment, we align
1892    * the right/bottom edge of the character the mark is at; if we're
1893    * doing left/top we align the left/top edge of the character; if
1894    * we're doing center alignment we align the center of the
1895    * character.
1896    */
1897
1898   /* Vertical scroll */
1899
1900   scroll_inc = 0;
1901   scroll_dest = current_y_scroll;
1902
1903   if (use_align)
1904     {
1905       scroll_dest = rect.y + (rect.height * yalign) - (screen.height * yalign);
1906
1907       /* if scroll_dest < screen.y, we move a negative increment (up),
1908        * else a positive increment (down)
1909        */
1910       scroll_inc = scroll_dest - screen.y + screen_yoffset;
1911     }
1912   else
1913     {
1914       /* move minimum to get onscreen */
1915       if (rect.y < screen.y)
1916         {
1917           scroll_dest = rect.y;
1918           scroll_inc = scroll_dest - screen.y - screen_yoffset;
1919         }
1920       else if ((rect.y + rect.height) > screen_bottom)
1921         {
1922           scroll_dest = rect.y + rect.height;
1923           scroll_inc = scroll_dest - screen_bottom + screen_yoffset;
1924         }
1925     }
1926
1927   if (scroll_inc != 0)
1928     {
1929       retval = set_adjustment_clamped (get_vadjustment (text_view),
1930                                        current_y_scroll + scroll_inc);
1931
1932       DV (g_print (" vert increment %d\n", scroll_inc));
1933     }
1934
1935   /* Horizontal scroll */
1936
1937   scroll_inc = 0;
1938   scroll_dest = current_x_scroll;
1939
1940   if (use_align)
1941     {
1942       scroll_dest = rect.x + (rect.width * xalign) - (screen.width * xalign);
1943
1944       /* if scroll_dest < screen.y, we move a negative increment (left),
1945        * else a positive increment (right)
1946        */
1947       scroll_inc = scroll_dest - screen.x + screen_xoffset;
1948     }
1949   else
1950     {
1951       /* move minimum to get onscreen */
1952       if (rect.x < screen.x)
1953         {
1954           scroll_dest = rect.x;
1955           scroll_inc = scroll_dest - screen.x - screen_xoffset;
1956         }
1957       else if ((rect.x + rect.width) > screen_right)
1958         {
1959           scroll_dest = rect.x + rect.width;
1960           scroll_inc = scroll_dest - screen_right + screen_xoffset;
1961         }
1962     }
1963
1964   if (scroll_inc != 0)
1965     {
1966       retval = set_adjustment_clamped (get_hadjustment (text_view),
1967                                        current_x_scroll + scroll_inc);
1968
1969       DV (g_print (" horiz increment %d\n", scroll_inc));
1970     }
1971
1972   if (retval)
1973     {
1974       DV(g_print (">Actually scrolled ("G_STRLOC")\n"));
1975     }
1976   else
1977     {
1978       DV(g_print (">Didn't end up scrolling ("G_STRLOC")\n"));
1979     }
1980
1981   return retval;
1982 }
1983
1984 static void
1985 free_pending_scroll (GtkTextPendingScroll *scroll)
1986 {
1987   if (!gtk_text_mark_get_deleted (scroll->mark))
1988     gtk_text_buffer_delete_mark (gtk_text_mark_get_buffer (scroll->mark),
1989                                  scroll->mark);
1990   g_object_unref (scroll->mark);
1991   g_free (scroll);
1992 }
1993
1994 static void
1995 cancel_pending_scroll (GtkTextView *text_view)
1996 {
1997   if (text_view->priv->pending_scroll)
1998     {
1999       free_pending_scroll (text_view->priv->pending_scroll);
2000       text_view->priv->pending_scroll = NULL;
2001     }
2002 }
2003
2004 static void
2005 gtk_text_view_queue_scroll (GtkTextView   *text_view,
2006                             GtkTextMark   *mark,
2007                             gdouble        within_margin,
2008                             gboolean       use_align,
2009                             gdouble        xalign,
2010                             gdouble        yalign)
2011 {
2012   GtkTextIter iter;
2013   GtkTextPendingScroll *scroll;
2014
2015   DV(g_print(G_STRLOC"\n"));
2016
2017   scroll = g_new (GtkTextPendingScroll, 1);
2018
2019   scroll->within_margin = within_margin;
2020   scroll->use_align = use_align;
2021   scroll->xalign = xalign;
2022   scroll->yalign = yalign;
2023
2024   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
2025
2026   scroll->mark = gtk_text_buffer_create_mark (get_buffer (text_view),
2027                                               NULL,
2028                                               &iter,
2029                                               gtk_text_mark_get_left_gravity (mark));
2030
2031   g_object_ref (scroll->mark);
2032
2033   cancel_pending_scroll (text_view);
2034
2035   text_view->priv->pending_scroll = scroll;
2036 }
2037
2038 static gboolean
2039 gtk_text_view_flush_scroll (GtkTextView *text_view)
2040 {
2041   GtkAllocation allocation;
2042   GtkTextIter iter;
2043   GtkTextPendingScroll *scroll;
2044   gboolean retval;
2045   GtkWidget *widget;
2046
2047   widget = GTK_WIDGET (text_view);
2048
2049   DV(g_print(G_STRLOC"\n"));
2050
2051   if (text_view->priv->pending_scroll == NULL)
2052     {
2053       DV (g_print ("in flush scroll, no pending scroll\n"));
2054       return FALSE;
2055     }
2056
2057   scroll = text_view->priv->pending_scroll;
2058
2059   /* avoid recursion */
2060   text_view->priv->pending_scroll = NULL;
2061
2062   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, scroll->mark);
2063
2064   /* Validate area around the scroll destination, so the adjustment
2065    * can meaningfully point into that area. We must validate
2066    * enough area to be sure that after we scroll, everything onscreen
2067    * is valid; otherwise, validation will maintain the first para
2068    * in one place, but may push the target iter off the bottom of
2069    * the screen.
2070    */
2071   DV(g_print (">Validating scroll destination ("G_STRLOC")\n"));
2072   gtk_widget_get_allocation (widget, &allocation);
2073   gtk_text_layout_validate_yrange (text_view->priv->layout, &iter,
2074                                    -(allocation.height * 2),
2075                                    allocation.height * 2);
2076
2077   DV(g_print (">Done validating scroll destination ("G_STRLOC")\n"));
2078
2079   /* Ensure we have updated width/height */
2080   gtk_text_view_update_adjustments (text_view);
2081
2082   retval = gtk_text_view_scroll_to_iter (text_view,
2083                                          &iter,
2084                                          scroll->within_margin,
2085                                          scroll->use_align,
2086                                          scroll->xalign,
2087                                          scroll->yalign);
2088
2089   free_pending_scroll (scroll);
2090
2091   return retval;
2092 }
2093
2094 static void
2095 gtk_text_view_set_adjustment_upper (GtkAdjustment *adj, gdouble upper)
2096 {
2097   if (upper != adj->upper)
2098     {
2099       gdouble min = MAX (0.0, upper - adj->page_size);
2100       gboolean value_changed = FALSE;
2101
2102       adj->upper = upper;
2103
2104       if (adj->value > min)
2105         {
2106           adj->value = min;
2107           value_changed = TRUE;
2108         }
2109
2110       gtk_adjustment_changed (adj);
2111       DV(g_print(">Changed adj upper to %g ("G_STRLOC")\n", upper));
2112
2113       if (value_changed)
2114         {
2115           DV(g_print(">Changed adj value because upper decreased ("G_STRLOC")\n"));
2116           gtk_adjustment_value_changed (adj);
2117         }
2118     }
2119 }
2120
2121 static void
2122 gtk_text_view_update_adjustments (GtkTextView *text_view)
2123 {
2124   GtkTextViewPrivate *priv;
2125   gint width = 0, height = 0;
2126
2127   DV(g_print(">Updating adjustments ("G_STRLOC")\n"));
2128
2129   priv = text_view->priv;
2130
2131   if (priv->layout)
2132     gtk_text_layout_get_size (priv->layout, &width, &height);
2133
2134   /* Make room for the cursor after the last character in the widest line */
2135   width += SPACE_FOR_CURSOR;
2136
2137   if (priv->width != width || priv->height != height)
2138     {
2139       if (priv->width != width)
2140         priv->width_changed = TRUE;
2141
2142       priv->width = width;
2143       priv->height = height;
2144
2145       gtk_text_view_set_adjustment_upper (get_hadjustment (text_view),
2146                                           MAX (SCREEN_WIDTH (text_view), width));
2147       gtk_text_view_set_adjustment_upper (get_vadjustment (text_view),
2148                                           MAX (SCREEN_HEIGHT (text_view), height));
2149
2150       /* hadj/vadj exist since we called get_hadjustment/get_vadjustment above */
2151
2152       /* Set up the step sizes; we'll say that a page is
2153          our allocation minus one step, and a step is
2154          1/10 of our allocation. */
2155       priv->hadjustment->step_increment =
2156         SCREEN_WIDTH (text_view) / 10.0;
2157       priv->hadjustment->page_increment =
2158         SCREEN_WIDTH (text_view) * 0.9;
2159
2160       priv->vadjustment->step_increment =
2161         SCREEN_HEIGHT (text_view) / 10.0;
2162       priv->vadjustment->page_increment =
2163         SCREEN_HEIGHT (text_view) * 0.9;
2164
2165       gtk_adjustment_changed (get_hadjustment (text_view));
2166       gtk_adjustment_changed (get_vadjustment (text_view));
2167     }
2168 }
2169
2170 static void
2171 gtk_text_view_update_layout_width (GtkTextView *text_view)
2172 {
2173   DV(g_print(">Updating layout width ("G_STRLOC")\n"));
2174
2175   gtk_text_view_ensure_layout (text_view);
2176
2177   gtk_text_layout_set_screen_width (text_view->priv->layout,
2178                                     MAX (1, SCREEN_WIDTH (text_view) - SPACE_FOR_CURSOR));
2179 }
2180
2181 static void
2182 gtk_text_view_update_im_spot_location (GtkTextView *text_view)
2183 {
2184   GdkRectangle area;
2185
2186   if (text_view->priv->layout == NULL)
2187     return;
2188
2189   gtk_text_view_get_cursor_location (text_view, &area);
2190
2191   area.x -= text_view->priv->xoffset;
2192   area.y -= text_view->priv->yoffset;
2193
2194   /* Width returned by Pango indicates direction of cursor,
2195    * by it's sign more than the size of cursor.
2196    */
2197   area.width = 0;
2198
2199   gtk_im_context_set_cursor_location (text_view->priv->im_context, &area);
2200 }
2201
2202 static gboolean
2203 do_update_im_spot_location (gpointer text_view)
2204 {
2205   GtkTextViewPrivate *priv;
2206
2207   priv = GTK_TEXT_VIEW (text_view)->priv;
2208   priv->im_spot_idle = 0;
2209
2210   gtk_text_view_update_im_spot_location (text_view);
2211   return FALSE;
2212 }
2213
2214 static void
2215 queue_update_im_spot_location (GtkTextView *text_view)
2216 {
2217   GtkTextViewPrivate *priv;
2218
2219   priv = text_view->priv;
2220
2221   /* Use priority a little higher than GTK_TEXT_VIEW_PRIORITY_VALIDATE,
2222    * so we don't wait until the entire buffer has been validated. */
2223   if (!priv->im_spot_idle)
2224     priv->im_spot_idle = gdk_threads_add_idle_full (GTK_TEXT_VIEW_PRIORITY_VALIDATE - 1,
2225                                                     do_update_im_spot_location,
2226                                                     text_view,
2227                                                     NULL);
2228 }
2229
2230 static void
2231 flush_update_im_spot_location (GtkTextView *text_view)
2232 {
2233   GtkTextViewPrivate *priv;
2234
2235   priv = text_view->priv;
2236
2237   if (priv->im_spot_idle)
2238     {
2239       g_source_remove (priv->im_spot_idle);
2240       priv->im_spot_idle = 0;
2241       gtk_text_view_update_im_spot_location (text_view);
2242     }
2243 }
2244
2245 /**
2246  * gtk_text_view_scroll_to_mark:
2247  * @text_view: a #GtkTextView
2248  * @mark: a #GtkTextMark
2249  * @within_margin: margin as a [0.0,0.5) fraction of screen size
2250  * @use_align: whether to use alignment arguments (if %FALSE, just
2251  *    get the mark onscreen)
2252  * @xalign: horizontal alignment of mark within visible area
2253  * @yalign: vertical alignment of mark within visible area
2254  *
2255  * Scrolls @text_view so that @mark is on the screen in the position
2256  * indicated by @xalign and @yalign. An alignment of 0.0 indicates
2257  * left or top, 1.0 indicates right or bottom, 0.5 means center.
2258  * If @use_align is %FALSE, the text scrolls the minimal distance to
2259  * get the mark onscreen, possibly not scrolling at all. The effective
2260  * screen for purposes of this function is reduced by a margin of size
2261  * @within_margin.
2262  **/
2263 void
2264 gtk_text_view_scroll_to_mark (GtkTextView *text_view,
2265                               GtkTextMark *mark,
2266                               gdouble      within_margin,
2267                               gboolean     use_align,
2268                               gdouble      xalign,
2269                               gdouble      yalign)
2270 {
2271   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2272   g_return_if_fail (GTK_IS_TEXT_MARK (mark));
2273   g_return_if_fail (within_margin >= 0.0 && within_margin < 0.5);
2274   g_return_if_fail (xalign >= 0.0 && xalign <= 1.0);
2275   g_return_if_fail (yalign >= 0.0 && yalign <= 1.0);
2276
2277   /* We need to verify that the buffer contains the mark, otherwise this
2278    * can lead to data structure corruption later on.
2279    */
2280   g_return_if_fail (get_buffer (text_view) == gtk_text_mark_get_buffer (mark));
2281
2282   gtk_text_view_queue_scroll (text_view, mark,
2283                               within_margin,
2284                               use_align,
2285                               xalign,
2286                               yalign);
2287
2288   /* If no validation is pending, we need to go ahead and force an
2289    * immediate scroll.
2290    */
2291   if (text_view->priv->layout &&
2292       gtk_text_layout_is_valid (text_view->priv->layout))
2293     gtk_text_view_flush_scroll (text_view);
2294 }
2295
2296 /**
2297  * gtk_text_view_scroll_mark_onscreen:
2298  * @text_view: a #GtkTextView
2299  * @mark: a mark in the buffer for @text_view
2300  *
2301  * Scrolls @text_view the minimum distance such that @mark is contained
2302  * within the visible area of the widget.
2303  **/
2304 void
2305 gtk_text_view_scroll_mark_onscreen (GtkTextView *text_view,
2306                                     GtkTextMark *mark)
2307 {
2308   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2309   g_return_if_fail (GTK_IS_TEXT_MARK (mark));
2310
2311   /* We need to verify that the buffer contains the mark, otherwise this
2312    * can lead to data structure corruption later on.
2313    */
2314   g_return_if_fail (get_buffer (text_view) == gtk_text_mark_get_buffer (mark));
2315
2316   gtk_text_view_scroll_to_mark (text_view, mark, 0.0, FALSE, 0.0, 0.0);
2317 }
2318
2319 static gboolean
2320 clamp_iter_onscreen (GtkTextView *text_view, GtkTextIter *iter)
2321 {
2322   GdkRectangle visible_rect;
2323   gtk_text_view_get_visible_rect (text_view, &visible_rect);
2324
2325   return gtk_text_layout_clamp_iter_to_vrange (text_view->priv->layout, iter,
2326                                                visible_rect.y,
2327                                                visible_rect.y + visible_rect.height);
2328 }
2329
2330 /**
2331  * gtk_text_view_move_mark_onscreen:
2332  * @text_view: a #GtkTextView
2333  * @mark: a #GtkTextMark
2334  *
2335  * Moves a mark within the buffer so that it's
2336  * located within the currently-visible text area.
2337  *
2338  * Return value: %TRUE if the mark moved (wasn't already onscreen)
2339  **/
2340 gboolean
2341 gtk_text_view_move_mark_onscreen (GtkTextView *text_view,
2342                                   GtkTextMark *mark)
2343 {
2344   GtkTextIter iter;
2345
2346   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
2347   g_return_val_if_fail (mark != NULL, FALSE);
2348
2349   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
2350
2351   if (clamp_iter_onscreen (text_view, &iter))
2352     {
2353       gtk_text_buffer_move_mark (get_buffer (text_view), mark, &iter);
2354       return TRUE;
2355     }
2356   else
2357     return FALSE;
2358 }
2359
2360 /**
2361  * gtk_text_view_get_visible_rect:
2362  * @text_view: a #GtkTextView
2363  * @visible_rect: rectangle to fill
2364  *
2365  * Fills @visible_rect with the currently-visible
2366  * region of the buffer, in buffer coordinates. Convert to window coordinates
2367  * with gtk_text_view_buffer_to_window_coords().
2368  **/
2369 void
2370 gtk_text_view_get_visible_rect (GtkTextView  *text_view,
2371                                 GdkRectangle *visible_rect)
2372 {
2373   GtkWidget *widget;
2374
2375   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2376
2377   widget = GTK_WIDGET (text_view);
2378
2379   if (visible_rect)
2380     {
2381       visible_rect->x = text_view->priv->xoffset;
2382       visible_rect->y = text_view->priv->yoffset;
2383       visible_rect->width = SCREEN_WIDTH (widget);
2384       visible_rect->height = SCREEN_HEIGHT (widget);
2385
2386       DV(g_print(" visible rect: %d,%d %d x %d\n",
2387                  visible_rect->x,
2388                  visible_rect->y,
2389                  visible_rect->width,
2390                  visible_rect->height));
2391     }
2392 }
2393
2394 /**
2395  * gtk_text_view_set_wrap_mode:
2396  * @text_view: a #GtkTextView
2397  * @wrap_mode: a #GtkWrapMode
2398  *
2399  * Sets the line wrapping for the view.
2400  **/
2401 void
2402 gtk_text_view_set_wrap_mode (GtkTextView *text_view,
2403                              GtkWrapMode  wrap_mode)
2404 {
2405   GtkTextViewPrivate *priv;
2406
2407   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2408
2409   priv = text_view->priv;
2410
2411   if (priv->wrap_mode != wrap_mode)
2412     {
2413       priv->wrap_mode = wrap_mode;
2414
2415       if (priv->layout)
2416         {
2417           priv->layout->default_style->wrap_mode = wrap_mode;
2418           gtk_text_layout_default_style_changed (priv->layout);
2419         }
2420     }
2421
2422   g_object_notify (G_OBJECT (text_view), "wrap-mode");
2423 }
2424
2425 /**
2426  * gtk_text_view_get_wrap_mode:
2427  * @text_view: a #GtkTextView
2428  *
2429  * Gets the line wrapping for the view.
2430  *
2431  * Return value: the line wrap setting
2432  **/
2433 GtkWrapMode
2434 gtk_text_view_get_wrap_mode (GtkTextView *text_view)
2435 {
2436   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_WRAP_NONE);
2437
2438   return text_view->priv->wrap_mode;
2439 }
2440
2441 /**
2442  * gtk_text_view_set_editable:
2443  * @text_view: a #GtkTextView
2444  * @setting: whether it's editable
2445  *
2446  * Sets the default editability of the #GtkTextView. You can override
2447  * this default setting with tags in the buffer, using the "editable"
2448  * attribute of tags.
2449  **/
2450 void
2451 gtk_text_view_set_editable (GtkTextView *text_view,
2452                             gboolean     setting)
2453 {
2454   GtkTextViewPrivate *priv;
2455
2456   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2457
2458   priv = text_view->priv;
2459   setting = setting != FALSE;
2460
2461   if (priv->editable != setting)
2462     {
2463       if (!setting)
2464         {
2465           gtk_text_view_reset_im_context(text_view);
2466           if (gtk_widget_has_focus (GTK_WIDGET (text_view)))
2467             gtk_im_context_focus_out (priv->im_context);
2468         }
2469
2470       priv->editable = setting;
2471
2472       if (setting && gtk_widget_has_focus (GTK_WIDGET (text_view)))
2473         gtk_im_context_focus_in (priv->im_context);
2474
2475       if (priv->layout)
2476         {
2477           gtk_text_layout_set_overwrite_mode (priv->layout,
2478                                               priv->overwrite_mode && priv->editable);
2479           priv->layout->default_style->editable = priv->editable;
2480           gtk_text_layout_default_style_changed (priv->layout);
2481         }
2482
2483       g_object_notify (G_OBJECT (text_view), "editable");
2484     }
2485 }
2486
2487 /**
2488  * gtk_text_view_get_editable:
2489  * @text_view: a #GtkTextView
2490  *
2491  * Returns the default editability of the #GtkTextView. Tags in the
2492  * buffer may override this setting for some ranges of text.
2493  *
2494  * Return value: whether text is editable by default
2495  **/
2496 gboolean
2497 gtk_text_view_get_editable (GtkTextView *text_view)
2498 {
2499   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
2500
2501   return text_view->priv->editable;
2502 }
2503
2504 /**
2505  * gtk_text_view_set_pixels_above_lines:
2506  * @text_view: a #GtkTextView
2507  * @pixels_above_lines: pixels above paragraphs
2508  *
2509  * Sets the default number of blank pixels above paragraphs in @text_view.
2510  * Tags in the buffer for @text_view may override the defaults.
2511  **/
2512 void
2513 gtk_text_view_set_pixels_above_lines (GtkTextView *text_view,
2514                                       gint         pixels_above_lines)
2515 {
2516   GtkTextViewPrivate *priv;
2517
2518   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2519
2520   priv = text_view->priv;
2521
2522   if (priv->pixels_above_lines != pixels_above_lines)
2523     {
2524       priv->pixels_above_lines = pixels_above_lines;
2525
2526       if (priv->layout)
2527         {
2528           priv->layout->default_style->pixels_above_lines = pixels_above_lines;
2529           gtk_text_layout_default_style_changed (priv->layout);
2530         }
2531
2532       g_object_notify (G_OBJECT (text_view), "pixels-above-lines");
2533     }
2534 }
2535
2536 /**
2537  * gtk_text_view_get_pixels_above_lines:
2538  * @text_view: a #GtkTextView
2539  *
2540  * Gets the default number of pixels to put above paragraphs.
2541  *
2542  * Return value: default number of pixels above paragraphs
2543  **/
2544 gint
2545 gtk_text_view_get_pixels_above_lines (GtkTextView *text_view)
2546 {
2547   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2548
2549   return text_view->priv->pixels_above_lines;
2550 }
2551
2552 /**
2553  * gtk_text_view_set_pixels_below_lines:
2554  * @text_view: a #GtkTextView
2555  * @pixels_below_lines: pixels below paragraphs
2556  *
2557  * Sets the default number of pixels of blank space
2558  * to put below paragraphs in @text_view. May be overridden
2559  * by tags applied to @text_view's buffer.
2560  **/
2561 void
2562 gtk_text_view_set_pixels_below_lines (GtkTextView *text_view,
2563                                       gint         pixels_below_lines)
2564 {
2565   GtkTextViewPrivate *priv;
2566
2567   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2568
2569   priv = text_view->priv;
2570
2571   if (priv->pixels_below_lines != pixels_below_lines)
2572     {
2573       priv->pixels_below_lines = pixels_below_lines;
2574
2575       if (priv->layout)
2576         {
2577           priv->layout->default_style->pixels_below_lines = pixels_below_lines;
2578           gtk_text_layout_default_style_changed (priv->layout);
2579         }
2580
2581       g_object_notify (G_OBJECT (text_view), "pixels-below-lines");
2582     }
2583 }
2584
2585 /**
2586  * gtk_text_view_get_pixels_below_lines:
2587  * @text_view: a #GtkTextView
2588  *
2589  * Gets the value set by gtk_text_view_set_pixels_below_lines().
2590  *
2591  * Return value: default number of blank pixels below paragraphs
2592  **/
2593 gint
2594 gtk_text_view_get_pixels_below_lines (GtkTextView *text_view)
2595 {
2596   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2597
2598   return text_view->priv->pixels_below_lines;
2599 }
2600
2601 /**
2602  * gtk_text_view_set_pixels_inside_wrap:
2603  * @text_view: a #GtkTextView
2604  * @pixels_inside_wrap: default number of pixels between wrapped lines
2605  *
2606  * Sets the default number of pixels of blank space to leave between
2607  * display/wrapped lines within a paragraph. May be overridden by
2608  * tags in @text_view's buffer.
2609  **/
2610 void
2611 gtk_text_view_set_pixels_inside_wrap (GtkTextView *text_view,
2612                                       gint         pixels_inside_wrap)
2613 {
2614   GtkTextViewPrivate *priv;
2615
2616   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2617
2618   priv = text_view->priv;
2619
2620   if (priv->pixels_inside_wrap != pixels_inside_wrap)
2621     {
2622       priv->pixels_inside_wrap = pixels_inside_wrap;
2623
2624       if (priv->layout)
2625         {
2626           priv->layout->default_style->pixels_inside_wrap = pixels_inside_wrap;
2627           gtk_text_layout_default_style_changed (priv->layout);
2628         }
2629
2630       g_object_notify (G_OBJECT (text_view), "pixels-inside-wrap");
2631     }
2632 }
2633
2634 /**
2635  * gtk_text_view_get_pixels_inside_wrap:
2636  * @text_view: a #GtkTextView
2637  *
2638  * Gets the value set by gtk_text_view_set_pixels_inside_wrap().
2639  *
2640  * Return value: default number of pixels of blank space between wrapped lines
2641  **/
2642 gint
2643 gtk_text_view_get_pixels_inside_wrap (GtkTextView *text_view)
2644 {
2645   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2646
2647   return text_view->priv->pixels_inside_wrap;
2648 }
2649
2650 /**
2651  * gtk_text_view_set_justification:
2652  * @text_view: a #GtkTextView
2653  * @justification: justification
2654  *
2655  * Sets the default justification of text in @text_view.
2656  * Tags in the view's buffer may override the default.
2657  *
2658  **/
2659 void
2660 gtk_text_view_set_justification (GtkTextView     *text_view,
2661                                  GtkJustification justification)
2662 {
2663   GtkTextViewPrivate *priv;
2664
2665   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2666
2667   priv = text_view->priv;
2668
2669   if (priv->justify != justification)
2670     {
2671       priv->justify = justification;
2672
2673       if (priv->layout)
2674         {
2675           priv->layout->default_style->justification = justification;
2676           gtk_text_layout_default_style_changed (priv->layout);
2677         }
2678
2679       g_object_notify (G_OBJECT (text_view), "justification");
2680     }
2681 }
2682
2683 /**
2684  * gtk_text_view_get_justification:
2685  * @text_view: a #GtkTextView
2686  *
2687  * Gets the default justification of paragraphs in @text_view.
2688  * Tags in the buffer may override the default.
2689  *
2690  * Return value: default justification
2691  **/
2692 GtkJustification
2693 gtk_text_view_get_justification (GtkTextView *text_view)
2694 {
2695   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_JUSTIFY_LEFT);
2696
2697   return text_view->priv->justify;
2698 }
2699
2700 /**
2701  * gtk_text_view_set_left_margin:
2702  * @text_view: a #GtkTextView
2703  * @left_margin: left margin in pixels
2704  *
2705  * Sets the default left margin for text in @text_view.
2706  * Tags in the buffer may override the default.
2707  **/
2708 void
2709 gtk_text_view_set_left_margin (GtkTextView *text_view,
2710                                gint         left_margin)
2711 {
2712   GtkTextViewPrivate *priv;
2713
2714   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2715
2716   priv = text_view->priv;
2717
2718   if (priv->left_margin != left_margin)
2719     {
2720       priv->left_margin = left_margin;
2721
2722       if (priv->layout)
2723         {
2724           priv->layout->default_style->left_margin = left_margin;
2725           gtk_text_layout_default_style_changed (priv->layout);
2726         }
2727
2728       g_object_notify (G_OBJECT (text_view), "left-margin");
2729     }
2730 }
2731
2732 /**
2733  * gtk_text_view_get_left_margin:
2734  * @text_view: a #GtkTextView
2735  *
2736  * Gets the default left margin size of paragraphs in the @text_view.
2737  * Tags in the buffer may override the default.
2738  *
2739  * Return value: left margin in pixels
2740  **/
2741 gint
2742 gtk_text_view_get_left_margin (GtkTextView *text_view)
2743 {
2744   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2745
2746   return text_view->priv->left_margin;
2747 }
2748
2749 /**
2750  * gtk_text_view_set_right_margin:
2751  * @text_view: a #GtkTextView
2752  * @right_margin: right margin in pixels
2753  *
2754  * Sets the default right margin for text in the text view.
2755  * Tags in the buffer may override the default.
2756  **/
2757 void
2758 gtk_text_view_set_right_margin (GtkTextView *text_view,
2759                                 gint         right_margin)
2760 {
2761   GtkTextViewPrivate *priv = text_view->priv;
2762
2763   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2764
2765   if (priv->right_margin != right_margin)
2766     {
2767       priv->right_margin = right_margin;
2768
2769       if (priv->layout)
2770         {
2771           priv->layout->default_style->right_margin = right_margin;
2772           gtk_text_layout_default_style_changed (priv->layout);
2773         }
2774
2775       g_object_notify (G_OBJECT (text_view), "right-margin");
2776     }
2777 }
2778
2779 /**
2780  * gtk_text_view_get_right_margin:
2781  * @text_view: a #GtkTextView
2782  *
2783  * Gets the default right margin for text in @text_view. Tags
2784  * in the buffer may override the default.
2785  *
2786  * Return value: right margin in pixels
2787  **/
2788 gint
2789 gtk_text_view_get_right_margin (GtkTextView *text_view)
2790 {
2791   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2792
2793   return text_view->priv->right_margin;
2794 }
2795
2796 /**
2797  * gtk_text_view_set_indent:
2798  * @text_view: a #GtkTextView
2799  * @indent: indentation in pixels
2800  *
2801  * Sets the default indentation for paragraphs in @text_view.
2802  * Tags in the buffer may override the default.
2803  **/
2804 void
2805 gtk_text_view_set_indent (GtkTextView *text_view,
2806                           gint         indent)
2807 {
2808   GtkTextViewPrivate *priv;
2809
2810   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2811
2812   priv = text_view->priv;
2813
2814   if (priv->indent != indent)
2815     {
2816       priv->indent = indent;
2817
2818       if (priv->layout)
2819         {
2820           priv->layout->default_style->indent = indent;
2821           gtk_text_layout_default_style_changed (priv->layout);
2822         }
2823
2824       g_object_notify (G_OBJECT (text_view), "indent");
2825     }
2826 }
2827
2828 /**
2829  * gtk_text_view_get_indent:
2830  * @text_view: a #GtkTextView
2831  *
2832  * Gets the default indentation of paragraphs in @text_view.
2833  * Tags in the view's buffer may override the default.
2834  * The indentation may be negative.
2835  *
2836  * Return value: number of pixels of indentation
2837  **/
2838 gint
2839 gtk_text_view_get_indent (GtkTextView *text_view)
2840 {
2841   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2842
2843   return text_view->priv->indent;
2844 }
2845
2846 /**
2847  * gtk_text_view_set_tabs:
2848  * @text_view: a #GtkTextView
2849  * @tabs: tabs as a #PangoTabArray
2850  *
2851  * Sets the default tab stops for paragraphs in @text_view.
2852  * Tags in the buffer may override the default.
2853  **/
2854 void
2855 gtk_text_view_set_tabs (GtkTextView   *text_view,
2856                         PangoTabArray *tabs)
2857 {
2858   GtkTextViewPrivate *priv;
2859
2860   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2861
2862   priv = text_view->priv;
2863
2864   if (priv->tabs)
2865     pango_tab_array_free (priv->tabs);
2866
2867   priv->tabs = tabs ? pango_tab_array_copy (tabs) : NULL;
2868
2869   if (priv->layout)
2870     {
2871       /* some unkosher futzing in internal struct details... */
2872       if (priv->layout->default_style->tabs)
2873         pango_tab_array_free (priv->layout->default_style->tabs);
2874
2875       priv->layout->default_style->tabs =
2876         priv->tabs ? pango_tab_array_copy (priv->tabs) : NULL;
2877
2878       gtk_text_layout_default_style_changed (priv->layout);
2879     }
2880
2881   g_object_notify (G_OBJECT (text_view), "tabs");
2882 }
2883
2884 /**
2885  * gtk_text_view_get_tabs:
2886  * @text_view: a #GtkTextView
2887  *
2888  * Gets the default tabs for @text_view. Tags in the buffer may
2889  * override the defaults. The returned array will be %NULL if
2890  * "standard" (8-space) tabs are used. Free the return value
2891  * with pango_tab_array_free().
2892  *
2893  * Return value: copy of default tab array, or %NULL if "standard"
2894  *    tabs are used; must be freed with pango_tab_array_free().
2895  **/
2896 PangoTabArray*
2897 gtk_text_view_get_tabs (GtkTextView *text_view)
2898 {
2899   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
2900
2901   return text_view->priv->tabs ? pango_tab_array_copy (text_view->priv->tabs) : NULL;
2902 }
2903
2904 static void
2905 gtk_text_view_toggle_cursor_visible (GtkTextView *text_view)
2906 {
2907   gtk_text_view_set_cursor_visible (text_view, !text_view->priv->cursor_visible);
2908 }
2909
2910 /**
2911  * gtk_text_view_set_cursor_visible:
2912  * @text_view: a #GtkTextView
2913  * @setting: whether to show the insertion cursor
2914  *
2915  * Toggles whether the insertion point is displayed. A buffer with no editable
2916  * text probably shouldn't have a visible cursor, so you may want to turn
2917  * the cursor off.
2918  **/
2919 void
2920 gtk_text_view_set_cursor_visible (GtkTextView *text_view,
2921                                   gboolean     setting)
2922 {
2923   GtkTextViewPrivate *priv;
2924
2925   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2926
2927   priv = text_view->priv;
2928   setting = (setting != FALSE);
2929
2930   if (priv->cursor_visible != setting)
2931     {
2932       priv->cursor_visible = setting;
2933
2934       if (gtk_widget_has_focus (GTK_WIDGET (text_view)))
2935         {
2936           if (priv->layout)
2937             {
2938               gtk_text_layout_set_cursor_visible (priv->layout, setting);
2939               gtk_text_view_check_cursor_blink (text_view);
2940             }
2941         }
2942
2943       g_object_notify (G_OBJECT (text_view), "cursor-visible");
2944     }
2945 }
2946
2947 /**
2948  * gtk_text_view_get_cursor_visible:
2949  * @text_view: a #GtkTextView
2950  *
2951  * Find out whether the cursor is being displayed.
2952  *
2953  * Return value: whether the insertion mark is visible
2954  **/
2955 gboolean
2956 gtk_text_view_get_cursor_visible (GtkTextView *text_view)
2957 {
2958   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
2959
2960   return text_view->priv->cursor_visible;
2961 }
2962
2963
2964 /**
2965  * gtk_text_view_place_cursor_onscreen:
2966  * @text_view: a #GtkTextView
2967  *
2968  * Moves the cursor to the currently visible region of the
2969  * buffer, it it isn't there already.
2970  *
2971  * Return value: %TRUE if the cursor had to be moved.
2972  **/
2973 gboolean
2974 gtk_text_view_place_cursor_onscreen (GtkTextView *text_view)
2975 {
2976   GtkTextIter insert;
2977
2978   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
2979
2980   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
2981                                     gtk_text_buffer_get_insert (get_buffer (text_view)));
2982
2983   if (clamp_iter_onscreen (text_view, &insert))
2984     {
2985       gtk_text_buffer_place_cursor (get_buffer (text_view), &insert);
2986       return TRUE;
2987     }
2988   else
2989     return FALSE;
2990 }
2991
2992 static void
2993 gtk_text_view_remove_validate_idles (GtkTextView *text_view)
2994 {
2995   GtkTextViewPrivate *priv = text_view->priv;
2996
2997   if (priv->first_validate_idle != 0)
2998     {
2999       DV (g_print ("Removing first validate idle: %s\n", G_STRLOC));
3000       g_source_remove (priv->first_validate_idle);
3001       priv->first_validate_idle = 0;
3002     }
3003
3004   if (priv->incremental_validate_idle != 0)
3005     {
3006       g_source_remove (priv->incremental_validate_idle);
3007       priv->incremental_validate_idle = 0;
3008     }
3009 }
3010
3011 static void
3012 gtk_text_view_destroy (GtkObject *object)
3013 {
3014   GtkTextView *text_view;
3015   GtkTextViewPrivate *priv;
3016
3017   text_view = GTK_TEXT_VIEW (object);
3018   priv = text_view->priv;
3019
3020   gtk_text_view_remove_validate_idles (text_view);
3021   gtk_text_view_set_buffer (text_view, NULL);
3022   gtk_text_view_destroy_layout (text_view);
3023
3024   if (text_view->priv->scroll_timeout)
3025     {
3026       g_source_remove (text_view->priv->scroll_timeout);
3027       text_view->priv->scroll_timeout = 0;
3028     }
3029
3030   if (priv->im_spot_idle)
3031     {
3032       g_source_remove (priv->im_spot_idle);
3033       priv->im_spot_idle = 0;
3034     }
3035
3036   GTK_OBJECT_CLASS (gtk_text_view_parent_class)->destroy (object);
3037 }
3038
3039 static void
3040 gtk_text_view_finalize (GObject *object)
3041 {
3042   GtkTextView *text_view;
3043   GtkTextViewPrivate *priv;
3044
3045   text_view = GTK_TEXT_VIEW (object);
3046   priv = text_view->priv;
3047
3048   g_assert (priv->buffer == NULL);
3049
3050   gtk_text_view_destroy_layout (text_view);
3051   gtk_text_view_set_buffer (text_view, NULL);
3052
3053   cancel_pending_scroll (text_view);
3054
3055   if (priv->tabs)
3056     pango_tab_array_free (priv->tabs);
3057
3058   if (priv->hadjustment)
3059     g_object_unref (priv->hadjustment);
3060   if (priv->vadjustment)
3061     g_object_unref (priv->vadjustment);
3062
3063   text_window_free (priv->text_window);
3064
3065   if (priv->left_window)
3066     text_window_free (priv->left_window);
3067
3068   if (priv->top_window)
3069     text_window_free (priv->top_window);
3070
3071   if (priv->right_window)
3072     text_window_free (priv->right_window);
3073
3074   if (priv->bottom_window)
3075     text_window_free (priv->bottom_window);
3076
3077   g_object_unref (priv->im_context);
3078
3079   g_free (priv->im_module);
3080
3081   G_OBJECT_CLASS (gtk_text_view_parent_class)->finalize (object);
3082 }
3083
3084 static void
3085 gtk_text_view_set_property (GObject         *object,
3086                             guint            prop_id,
3087                             const GValue    *value,
3088                             GParamSpec      *pspec)
3089 {
3090   GtkTextView *text_view;
3091   GtkTextViewPrivate *priv;
3092
3093   text_view = GTK_TEXT_VIEW (object);
3094   priv = text_view->priv;
3095
3096   switch (prop_id)
3097     {
3098     case PROP_PIXELS_ABOVE_LINES:
3099       gtk_text_view_set_pixels_above_lines (text_view, g_value_get_int (value));
3100       break;
3101
3102     case PROP_PIXELS_BELOW_LINES:
3103       gtk_text_view_set_pixels_below_lines (text_view, g_value_get_int (value));
3104       break;
3105
3106     case PROP_PIXELS_INSIDE_WRAP:
3107       gtk_text_view_set_pixels_inside_wrap (text_view, g_value_get_int (value));
3108       break;
3109
3110     case PROP_EDITABLE:
3111       gtk_text_view_set_editable (text_view, g_value_get_boolean (value));
3112       break;
3113
3114     case PROP_WRAP_MODE:
3115       gtk_text_view_set_wrap_mode (text_view, g_value_get_enum (value));
3116       break;
3117
3118     case PROP_JUSTIFICATION:
3119       gtk_text_view_set_justification (text_view, g_value_get_enum (value));
3120       break;
3121
3122     case PROP_LEFT_MARGIN:
3123       gtk_text_view_set_left_margin (text_view, g_value_get_int (value));
3124       break;
3125
3126     case PROP_RIGHT_MARGIN:
3127       gtk_text_view_set_right_margin (text_view, g_value_get_int (value));
3128       break;
3129
3130     case PROP_INDENT:
3131       gtk_text_view_set_indent (text_view, g_value_get_int (value));
3132       break;
3133
3134     case PROP_TABS:
3135       gtk_text_view_set_tabs (text_view, g_value_get_boxed (value));
3136       break;
3137
3138     case PROP_CURSOR_VISIBLE:
3139       gtk_text_view_set_cursor_visible (text_view, g_value_get_boolean (value));
3140       break;
3141
3142     case PROP_OVERWRITE:
3143       gtk_text_view_set_overwrite (text_view, g_value_get_boolean (value));
3144       break;
3145
3146     case PROP_BUFFER:
3147       gtk_text_view_set_buffer (text_view, GTK_TEXT_BUFFER (g_value_get_object (value)));
3148       break;
3149
3150     case PROP_ACCEPTS_TAB:
3151       gtk_text_view_set_accepts_tab (text_view, g_value_get_boolean (value));
3152       break;
3153
3154     case PROP_IM_MODULE:
3155       g_free (priv->im_module);
3156       priv->im_module = g_value_dup_string (value);
3157       if (GTK_IS_IM_MULTICONTEXT (priv->im_context))
3158         gtk_im_multicontext_set_context_id (GTK_IM_MULTICONTEXT (priv->im_context), priv->im_module);
3159       break;
3160
3161     default:
3162       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
3163       break;
3164     }
3165 }
3166
3167 static void
3168 gtk_text_view_get_property (GObject         *object,
3169                             guint            prop_id,
3170                             GValue          *value,
3171                             GParamSpec      *pspec)
3172 {
3173   GtkTextView *text_view;
3174   GtkTextViewPrivate *priv;
3175
3176   text_view = GTK_TEXT_VIEW (object);
3177   priv = text_view->priv;
3178
3179   switch (prop_id)
3180     {
3181     case PROP_PIXELS_ABOVE_LINES:
3182       g_value_set_int (value, priv->pixels_above_lines);
3183       break;
3184
3185     case PROP_PIXELS_BELOW_LINES:
3186       g_value_set_int (value, priv->pixels_below_lines);
3187       break;
3188
3189     case PROP_PIXELS_INSIDE_WRAP:
3190       g_value_set_int (value, priv->pixels_inside_wrap);
3191       break;
3192
3193     case PROP_EDITABLE:
3194       g_value_set_boolean (value, priv->editable);
3195       break;
3196
3197     case PROP_WRAP_MODE:
3198       g_value_set_enum (value, priv->wrap_mode);
3199       break;
3200
3201     case PROP_JUSTIFICATION:
3202       g_value_set_enum (value, priv->justify);
3203       break;
3204
3205     case PROP_LEFT_MARGIN:
3206       g_value_set_int (value, priv->left_margin);
3207       break;
3208
3209     case PROP_RIGHT_MARGIN:
3210       g_value_set_int (value, priv->right_margin);
3211       break;
3212
3213     case PROP_INDENT:
3214       g_value_set_int (value, priv->indent);
3215       break;
3216
3217     case PROP_TABS:
3218       g_value_set_boxed (value, priv->tabs);
3219       break;
3220
3221     case PROP_CURSOR_VISIBLE:
3222       g_value_set_boolean (value, priv->cursor_visible);
3223       break;
3224
3225     case PROP_BUFFER:
3226       g_value_set_object (value, get_buffer (text_view));
3227       break;
3228
3229     case PROP_OVERWRITE:
3230       g_value_set_boolean (value, priv->overwrite_mode);
3231       break;
3232
3233     case PROP_ACCEPTS_TAB:
3234       g_value_set_boolean (value, priv->accepts_tab);
3235       break;
3236
3237     case PROP_IM_MODULE:
3238       g_value_set_string (value, priv->im_module);
3239       break;
3240
3241     default:
3242       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
3243       break;
3244     }
3245 }
3246
3247 static void
3248 gtk_text_view_size_request (GtkWidget      *widget,
3249                             GtkRequisition *requisition)
3250 {
3251   GtkTextView *text_view;
3252   GtkTextViewPrivate *priv;
3253   GSList *tmp_list;
3254   gint focus_edge_width;
3255   gint focus_width;
3256   guint border_width;
3257   gboolean interior_focus;
3258
3259   text_view = GTK_TEXT_VIEW (widget);
3260   priv = text_view->priv;
3261
3262   gtk_widget_style_get (widget,
3263                         "interior-focus", &interior_focus,
3264                         "focus-line-width", &focus_width,
3265                         NULL);
3266
3267   if (interior_focus)
3268     focus_edge_width = 0;
3269   else
3270     focus_edge_width = focus_width;
3271
3272   if (priv->layout)
3273     {
3274       priv->text_window->requisition.width = priv->layout->width;
3275       priv->text_window->requisition.height = priv->layout->height;
3276     }
3277   else
3278     {
3279       priv->text_window->requisition.width = 0;
3280       priv->text_window->requisition.height = 0;
3281     }
3282
3283   requisition->width = priv->text_window->requisition.width + focus_edge_width * 2;
3284   requisition->height = priv->text_window->requisition.height + focus_edge_width * 2;
3285
3286   if (priv->left_window)
3287     requisition->width += priv->left_window->requisition.width;
3288
3289   if (priv->right_window)
3290     requisition->width += priv->right_window->requisition.width;
3291
3292   if (priv->top_window)
3293     requisition->height += priv->top_window->requisition.height;
3294
3295   if (priv->bottom_window)
3296     requisition->height += priv->bottom_window->requisition.height;
3297
3298   border_width = gtk_container_get_border_width (GTK_CONTAINER (text_view));
3299   requisition->width += border_width * 2;
3300   requisition->height += border_width * 2;
3301
3302   tmp_list = priv->children;
3303   while (tmp_list != NULL)
3304     {
3305       GtkTextViewChild *child = tmp_list->data;
3306
3307       if (child->anchor)
3308         {
3309           GtkRequisition child_req;
3310           GtkRequisition old_req;
3311
3312           gtk_size_request_get_size (GTK_SIZE_REQUEST (child->widget),
3313                                      &old_req, NULL);
3314
3315           gtk_size_request_get_size (GTK_SIZE_REQUEST (child->widget),
3316                                      &child_req, NULL);
3317
3318           /* Invalidate layout lines if required */
3319           if (priv->layout &&
3320               (old_req.width != child_req.width ||
3321                old_req.height != child_req.height))
3322             gtk_text_child_anchor_queue_resize (child->anchor,
3323                                                 priv->layout);
3324         }
3325       else
3326         {
3327           GtkRequisition child_req;
3328
3329           gtk_size_request_get_size (GTK_SIZE_REQUEST (child->widget),
3330                                      &child_req, NULL);
3331         }
3332
3333       tmp_list = g_slist_next (tmp_list);
3334     }
3335
3336   /* Cache the requested size of the text view so we can
3337    * compare it in the changed_handler() */
3338   priv->cached_size_request = *requisition;
3339 }
3340
3341 static void
3342 gtk_text_view_compute_child_allocation (GtkTextView      *text_view,
3343                                         GtkTextViewChild *vc,
3344                                         GtkAllocation    *allocation)
3345 {
3346   gint buffer_y;
3347   GtkTextIter iter;
3348   GtkRequisition req;
3349
3350   gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
3351                                             &iter,
3352                                             vc->anchor);
3353
3354   gtk_text_layout_get_line_yrange (text_view->priv->layout, &iter,
3355                                    &buffer_y, NULL);
3356
3357   buffer_y += vc->from_top_of_line;
3358
3359   allocation->x = vc->from_left_of_buffer - text_view->priv->xoffset;
3360   allocation->y = buffer_y - text_view->priv->yoffset;
3361
3362   gtk_size_request_get_size (GTK_SIZE_REQUEST (vc->widget),
3363                              &req, NULL);
3364   allocation->width = req.width;
3365   allocation->height = req.height;
3366 }
3367
3368 static void
3369 gtk_text_view_update_child_allocation (GtkTextView      *text_view,
3370                                        GtkTextViewChild *vc)
3371 {
3372   GtkAllocation allocation;
3373
3374   gtk_text_view_compute_child_allocation (text_view, vc, &allocation);
3375
3376   gtk_widget_size_allocate (vc->widget, &allocation);
3377
3378 #if 0
3379   g_print ("allocation for %p allocated to %d,%d yoffset = %d\n",
3380            vc->widget,
3381            vc->widget->allocation.x,
3382            vc->widget->allocation.y,
3383            text_view->priv->yoffset);
3384 #endif
3385 }
3386
3387 static void
3388 gtk_text_view_child_allocated (GtkTextLayout *layout,
3389                                GtkWidget     *child,
3390                                gint           x,
3391                                gint           y,
3392                                gpointer       data)
3393 {
3394   GtkTextViewChild *vc = NULL;
3395   GtkTextView *text_view = data;
3396
3397   /* x,y is the position of the child from the top of the line, and
3398    * from the left of the buffer. We have to translate that into text
3399    * window coordinates, then size_allocate the child.
3400    */
3401
3402   vc = g_object_get_data (G_OBJECT (child),
3403                           "gtk-text-view-child");
3404
3405   g_assert (vc != NULL);
3406
3407   DV (g_print ("child allocated at %d,%d\n", x, y));
3408
3409   vc->from_left_of_buffer = x;
3410   vc->from_top_of_line = y;
3411
3412   gtk_text_view_update_child_allocation (text_view, vc);
3413 }
3414
3415 static void
3416 gtk_text_view_allocate_children (GtkTextView *text_view)
3417 {
3418   GSList *tmp_list;
3419
3420   DV(g_print(G_STRLOC"\n"));
3421
3422   tmp_list = text_view->priv->children;
3423   while (tmp_list != NULL)
3424     {
3425       GtkTextViewChild *child = tmp_list->data;
3426
3427       g_assert (child != NULL);
3428
3429       if (child->anchor)
3430         {
3431           /* We need to force-validate the regions containing
3432            * children.
3433            */
3434           GtkTextIter child_loc;
3435           gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
3436                                                     &child_loc,
3437                                                     child->anchor);
3438
3439           /* Since anchored children are only ever allocated from
3440            * gtk_text_layout_get_line_display() we have to make sure
3441            * that the display line caching in the layout doesn't
3442            * get in the way. Invalidating the layout around the anchor
3443            * achieves this.
3444            */
3445           if (GTK_WIDGET_ALLOC_NEEDED (child->widget))
3446             {
3447               GtkTextIter end = child_loc;
3448               gtk_text_iter_forward_char (&end);
3449               gtk_text_layout_invalidate (text_view->priv->layout, &child_loc, &end);
3450             }
3451
3452           gtk_text_layout_validate_yrange (text_view->priv->layout,
3453                                            &child_loc,
3454                                            0, 1);
3455         }
3456       else
3457         {
3458           GtkAllocation allocation;
3459           GtkRequisition child_req;
3460
3461           allocation.x = child->x;
3462           allocation.y = child->y;
3463
3464           gtk_size_request_get_size (GTK_SIZE_REQUEST (child->widget),
3465                                      &child_req, NULL);
3466
3467           allocation.width = child_req.width;
3468           allocation.height = child_req.height;
3469
3470           gtk_widget_size_allocate (child->widget, &allocation);
3471         }
3472
3473       tmp_list = g_slist_next (tmp_list);
3474     }
3475 }
3476
3477 static void
3478 gtk_text_view_size_allocate (GtkWidget *widget,
3479                              GtkAllocation *allocation)
3480 {
3481   GtkAllocation widget_allocation;
3482   GtkTextView *text_view;
3483   GtkTextViewPrivate *priv;
3484   GtkTextIter first_para;
3485   gint y;
3486   gint width, height;
3487   GdkRectangle text_rect;
3488   GdkRectangle left_rect;
3489   GdkRectangle right_rect;
3490   GdkRectangle top_rect;
3491   GdkRectangle bottom_rect;
3492   gint focus_edge_width;
3493   gint focus_width;
3494   guint border_width;
3495   gboolean interior_focus;
3496   gboolean size_changed;
3497
3498   text_view = GTK_TEXT_VIEW (widget);
3499   priv = text_view->priv;
3500
3501   DV(g_print(G_STRLOC"\n"));
3502
3503   gtk_widget_get_allocation (widget, &widget_allocation);
3504   size_changed =
3505     widget_allocation.width != allocation->width ||
3506     widget_allocation.height != allocation->height;
3507
3508   border_width = gtk_container_get_border_width (GTK_CONTAINER (text_view));
3509
3510   gtk_widget_set_allocation (widget, allocation);
3511
3512   if (gtk_widget_get_realized (widget))
3513     {
3514       gdk_window_move_resize (gtk_widget_get_window (widget),
3515                               allocation->x, allocation->y,
3516                               allocation->width, allocation->height);
3517     }
3518
3519   /* distribute width/height among child windows. Ensure all
3520    * windows get at least a 1x1 allocation.
3521    */
3522
3523   gtk_widget_style_get (widget,
3524                         "interior-focus", &interior_focus,
3525                         "focus-line-width", &focus_width,
3526                         NULL);
3527
3528   if (interior_focus)
3529     focus_edge_width = 0;
3530   else
3531     focus_edge_width = focus_width;
3532
3533   width = allocation->width - focus_edge_width * 2 - border_width * 2;
3534
3535   if (priv->left_window)
3536     left_rect.width = priv->left_window->requisition.width;
3537   else
3538     left_rect.width = 0;
3539
3540   width -= left_rect.width;
3541
3542   if (priv->right_window)
3543     right_rect.width = priv->right_window->requisition.width;
3544   else
3545     right_rect.width = 0;
3546
3547   width -= right_rect.width;
3548
3549   text_rect.width = MAX (1, width);
3550
3551   top_rect.width = text_rect.width;
3552   bottom_rect.width = text_rect.width;
3553
3554
3555   height = allocation->height - focus_edge_width * 2 - border_width * 2;
3556
3557   if (priv->top_window)
3558     top_rect.height = priv->top_window->requisition.height;
3559   else
3560     top_rect.height = 0;
3561
3562   height -= top_rect.height;
3563
3564   if (priv->bottom_window)
3565     bottom_rect.height = priv->bottom_window->requisition.height;
3566   else
3567     bottom_rect.height = 0;
3568
3569   height -= bottom_rect.height;
3570
3571   text_rect.height = MAX (1, height);
3572
3573   left_rect.height = text_rect.height;
3574   right_rect.height = text_rect.height;
3575
3576   /* Origins */
3577   left_rect.x = focus_edge_width + border_width;
3578   top_rect.y = focus_edge_width + border_width;
3579
3580   text_rect.x = left_rect.x + left_rect.width;
3581   text_rect.y = top_rect.y + top_rect.height;
3582
3583   left_rect.y = text_rect.y;
3584   right_rect.y = text_rect.y;
3585
3586   top_rect.x = text_rect.x;
3587   bottom_rect.x = text_rect.x;
3588
3589   right_rect.x = text_rect.x + text_rect.width;
3590   bottom_rect.y = text_rect.y + text_rect.height;
3591
3592   text_window_size_allocate (priv->text_window,
3593                              &text_rect);
3594
3595   if (priv->left_window)
3596     text_window_size_allocate (priv->left_window,
3597                                &left_rect);
3598
3599   if (priv->right_window)
3600     text_window_size_allocate (priv->right_window,
3601                                &right_rect);
3602
3603   if (priv->top_window)
3604     text_window_size_allocate (priv->top_window,
3605                                &top_rect);
3606
3607   if (priv->bottom_window)
3608     text_window_size_allocate (priv->bottom_window,
3609                                &bottom_rect);
3610
3611   gtk_text_view_update_layout_width (text_view);
3612
3613   /* Note that this will do some layout validation */
3614   gtk_text_view_allocate_children (text_view);
3615
3616   /* Ensure h/v adj exist */
3617   get_hadjustment (text_view);
3618   get_vadjustment (text_view);
3619
3620   priv->hadjustment->page_size = SCREEN_WIDTH (text_view);
3621   priv->hadjustment->page_increment = SCREEN_WIDTH (text_view) * 0.9;
3622   priv->hadjustment->step_increment = SCREEN_WIDTH (text_view) * 0.1;
3623   priv->hadjustment->lower = 0;
3624   priv->hadjustment->upper = MAX (SCREEN_WIDTH (text_view),
3625                                   priv->width);
3626
3627   if (priv->hadjustment->value > priv->hadjustment->upper - priv->hadjustment->page_size)
3628     gtk_adjustment_set_value (priv->hadjustment, MAX (0, priv->hadjustment->upper - priv->hadjustment->page_size));
3629
3630   gtk_adjustment_changed (priv->hadjustment);
3631
3632   priv->vadjustment->page_size = SCREEN_HEIGHT (text_view);
3633   priv->vadjustment->page_increment = SCREEN_HEIGHT (text_view) * 0.9;
3634   priv->vadjustment->step_increment = SCREEN_HEIGHT (text_view) * 0.1;
3635   priv->vadjustment->lower = 0;
3636   priv->vadjustment->upper = MAX (SCREEN_HEIGHT (text_view),
3637                                   priv->height);
3638
3639   /* Now adjust the value of the adjustment to keep the cursor at the
3640    * same place in the buffer
3641    */
3642   gtk_text_view_get_first_para_iter (text_view, &first_para);
3643   gtk_text_layout_get_line_yrange (priv->layout, &first_para, &y, NULL);
3644
3645   y += priv->first_para_pixels;
3646
3647   if (y > priv->vadjustment->upper - priv->vadjustment->page_size)
3648     y = MAX (0, priv->vadjustment->upper - priv->vadjustment->page_size);
3649
3650   if (y != priv->yoffset)
3651     gtk_adjustment_set_value (priv->vadjustment, y);
3652
3653   gtk_adjustment_changed (priv->vadjustment);
3654
3655   /* The GTK resize loop processes all the pending exposes right
3656    * after doing the resize stuff, so the idle sizer won't have a
3657    * chance to run. So we do the work here.
3658    */
3659   gtk_text_view_flush_first_validate (text_view);
3660
3661   /* widget->window doesn't get auto-redrawn as the layout is computed, so has to
3662    * be invalidated
3663    */
3664   if (size_changed && gtk_widget_get_realized (widget))
3665     gdk_window_invalidate_rect (gtk_widget_get_window (widget), NULL, FALSE);
3666 }
3667
3668 static void
3669 gtk_text_view_get_first_para_iter (GtkTextView *text_view,
3670                                    GtkTextIter *iter)
3671 {
3672   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), iter,
3673                                     text_view->priv->first_para_mark);
3674 }
3675
3676 static void
3677 gtk_text_view_validate_onscreen (GtkTextView *text_view)
3678 {
3679   GtkWidget *widget;
3680   GtkTextViewPrivate *priv;
3681
3682   widget = GTK_WIDGET (text_view);
3683   priv = text_view->priv;
3684
3685   DV(g_print(">Validating onscreen ("G_STRLOC")\n"));
3686
3687   if (SCREEN_HEIGHT (widget) > 0)
3688     {
3689       GtkTextIter first_para;
3690
3691       /* Be sure we've validated the stuff onscreen; if we
3692        * scrolled, these calls won't have any effect, because
3693        * they were called in the recursive validate_onscreen
3694        */
3695       gtk_text_view_get_first_para_iter (text_view, &first_para);
3696
3697       gtk_text_layout_validate_yrange (priv->layout,
3698                                        &first_para,
3699                                        0,
3700                                        priv->first_para_pixels +
3701                                        SCREEN_HEIGHT (widget));
3702     }
3703
3704   priv->onscreen_validated = TRUE;
3705
3706   DV(g_print(">Done validating onscreen, onscreen_validated = TRUE ("G_STRLOC")\n"));
3707
3708   /* This can have the odd side effect of triggering a scroll, which should
3709    * flip "onscreen_validated" back to FALSE, but should also get us
3710    * back into this function to turn it on again.
3711    */
3712   gtk_text_view_update_adjustments (text_view);
3713
3714   g_assert (priv->onscreen_validated);
3715 }
3716
3717 static void
3718 gtk_text_view_flush_first_validate (GtkTextView *text_view)
3719 {
3720   GtkTextViewPrivate *priv = text_view->priv;
3721
3722   if (priv->first_validate_idle == 0)
3723     return;
3724
3725   /* Do this first, which means that if an "invalidate"
3726    * occurs during any of this process, a new first_validate_callback
3727    * will be installed, and we'll start again.
3728    */
3729   DV (g_print ("removing first validate in %s\n", G_STRLOC));
3730   g_source_remove (priv->first_validate_idle);
3731   priv->first_validate_idle = 0;
3732
3733   /* be sure we have up-to-date screen size set on the
3734    * layout.
3735    */
3736   gtk_text_view_update_layout_width (text_view);
3737
3738   /* Bail out if we invalidated stuff; scrolling right away will just
3739    * confuse the issue.
3740    */
3741   if (priv->first_validate_idle != 0)
3742     {
3743       DV(g_print(">Width change forced requeue ("G_STRLOC")\n"));
3744     }
3745   else
3746     {
3747       /* scroll to any marks, if that's pending. This can jump us to
3748        * the validation codepath used for scrolling onscreen, if so we
3749        * bail out.  It won't jump if already in that codepath since
3750        * value_changed is not recursive, so also validate if
3751        * necessary.
3752        */
3753       if (!gtk_text_view_flush_scroll (text_view) ||
3754           !priv->onscreen_validated)
3755         gtk_text_view_validate_onscreen (text_view);
3756
3757       DV(g_print(">Leaving first validate idle ("G_STRLOC")\n"));
3758
3759       g_assert (priv->onscreen_validated);
3760     }
3761 }
3762
3763 static gboolean
3764 first_validate_callback (gpointer data)
3765 {
3766   GtkTextView *text_view = data;
3767
3768   /* Note that some of this code is duplicated at the end of size_allocate,
3769    * keep in sync with that.
3770    */
3771
3772   DV(g_print(G_STRLOC"\n"));
3773
3774   gtk_text_view_flush_first_validate (text_view);
3775
3776   return FALSE;
3777 }
3778
3779 static gboolean
3780 incremental_validate_callback (gpointer data)
3781 {
3782   GtkTextView *text_view = data;
3783   gboolean result = TRUE;
3784
3785   DV(g_print(G_STRLOC"\n"));
3786
3787   gtk_text_layout_validate (text_view->priv->layout, 2000);
3788
3789   gtk_text_view_update_adjustments (text_view);
3790
3791   if (gtk_text_layout_is_valid (text_view->priv->layout))
3792     {
3793       text_view->priv->incremental_validate_idle = 0;
3794       result = FALSE;
3795     }
3796
3797   return result;
3798 }
3799
3800 static void
3801 gtk_text_view_invalidate (GtkTextView *text_view)
3802 {
3803   GtkTextViewPrivate *priv = text_view->priv;
3804
3805   DV (g_print (">Invalidate, onscreen_validated = %d now FALSE ("G_STRLOC")\n",
3806                priv->onscreen_validated));
3807
3808   priv->onscreen_validated = FALSE;
3809
3810   /* We'll invalidate when the layout is created */
3811   if (priv->layout == NULL)
3812     return;
3813
3814   if (!priv->first_validate_idle)
3815     {
3816       priv->first_validate_idle = gdk_threads_add_idle_full (GTK_PRIORITY_RESIZE - 2, first_validate_callback, text_view, NULL);
3817       DV (g_print (G_STRLOC": adding first validate idle %d\n",
3818                    priv->first_validate_idle));
3819     }
3820
3821   if (!priv->incremental_validate_idle)
3822     {
3823       priv->incremental_validate_idle = gdk_threads_add_idle_full (GTK_TEXT_VIEW_PRIORITY_VALIDATE, incremental_validate_callback, text_view, NULL);
3824       DV (g_print (G_STRLOC": adding incremental validate idle %d\n",
3825                    priv->incremental_validate_idle));
3826     }
3827 }
3828
3829 static void
3830 invalidated_handler (GtkTextLayout *layout,
3831                      gpointer       data)
3832 {
3833   GtkTextView *text_view;
3834
3835   text_view = GTK_TEXT_VIEW (data);
3836
3837   DV (g_print ("Invalidating due to layout invalidate signal\n"));
3838   gtk_text_view_invalidate (text_view);
3839 }
3840
3841 static void
3842 changed_handler (GtkTextLayout     *layout,
3843                  gint               start_y,
3844                  gint               old_height,
3845                  gint               new_height,
3846                  gpointer           data)
3847 {
3848   GtkTextView *text_view;
3849   GtkTextViewPrivate *priv;
3850   GtkWidget *widget;
3851   GdkRectangle visible_rect;
3852   GdkRectangle redraw_rect;
3853
3854   text_view = GTK_TEXT_VIEW (data);
3855   priv = text_view->priv;
3856   widget = GTK_WIDGET (data);
3857
3858   DV(g_print(">Lines Validated ("G_STRLOC")\n"));
3859
3860   if (gtk_widget_get_realized (widget))
3861     {
3862       gtk_text_view_get_visible_rect (text_view, &visible_rect);
3863
3864       redraw_rect.x = visible_rect.x;
3865       redraw_rect.width = visible_rect.width;
3866       redraw_rect.y = start_y;
3867
3868       if (old_height == new_height)
3869         redraw_rect.height = old_height;
3870       else if (start_y + old_height > visible_rect.y)
3871         redraw_rect.height = MAX (0, visible_rect.y + visible_rect.height - start_y);
3872       else
3873         redraw_rect.height = 0;
3874
3875       if (gdk_rectangle_intersect (&redraw_rect, &visible_rect, &redraw_rect))
3876         {
3877           /* text_window_invalidate_rect() takes buffer coordinates */
3878           text_window_invalidate_rect (priv->text_window,
3879                                        &redraw_rect);
3880
3881           DV(g_print(" invalidated rect: %d,%d %d x %d\n",
3882                      redraw_rect.x,
3883                      redraw_rect.y,
3884                      redraw_rect.width,
3885                      redraw_rect.height));
3886
3887           if (priv->left_window)
3888             text_window_invalidate_rect (priv->left_window,
3889                                          &redraw_rect);
3890           if (priv->right_window)
3891             text_window_invalidate_rect (priv->right_window,
3892                                          &redraw_rect);
3893           if (priv->top_window)
3894             text_window_invalidate_rect (priv->top_window,
3895                                          &redraw_rect);
3896           if (priv->bottom_window)
3897             text_window_invalidate_rect (priv->bottom_window,
3898                                          &redraw_rect);
3899
3900           queue_update_im_spot_location (text_view);
3901         }
3902     }
3903
3904   if (old_height != new_height)
3905     {
3906       gboolean yoffset_changed = FALSE;
3907       GSList *tmp_list;
3908       int new_first_para_top;
3909       int old_first_para_top;
3910       GtkTextIter first;
3911
3912       /* If the bottom of the old area was above the top of the
3913        * screen, we need to scroll to keep the current top of the
3914        * screen in place.  Remember that first_para_pixels is the
3915        * position of the top of the screen in coordinates relative to
3916        * the first paragraph onscreen.
3917        *
3918        * In short we are adding the height delta of the portion of the
3919        * changed region above first_para_mark to priv->yoffset.
3920        */
3921       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &first,
3922                                         priv->first_para_mark);
3923
3924       gtk_text_layout_get_line_yrange (layout, &first, &new_first_para_top, NULL);
3925
3926       old_first_para_top = priv->yoffset - priv->first_para_pixels;
3927
3928       if (new_first_para_top != old_first_para_top)
3929         {
3930           priv->yoffset += new_first_para_top - old_first_para_top;
3931
3932           get_vadjustment (text_view)->value = priv->yoffset;
3933           yoffset_changed = TRUE;
3934         }
3935
3936       if (yoffset_changed)
3937         {
3938           DV(g_print ("Changing scroll position (%s)\n", G_STRLOC));
3939           gtk_adjustment_value_changed (get_vadjustment (text_view));
3940         }
3941
3942       /* FIXME be smarter about which anchored widgets we update */
3943
3944       tmp_list = priv->children;
3945       while (tmp_list != NULL)
3946         {
3947           GtkTextViewChild *child = tmp_list->data;
3948
3949           if (child->anchor)
3950             gtk_text_view_update_child_allocation (text_view, child);
3951
3952           tmp_list = g_slist_next (tmp_list);
3953         }
3954     }
3955
3956   {
3957     GtkRequisition old_req = priv->cached_size_request;
3958     GtkRequisition new_req;
3959
3960     /* Use this instead of gtk_widget_size_request wrapper
3961      * to avoid the optimization which just returns widget->requisition
3962      * if a resize hasn't been queued.
3963      */
3964     GTK_WIDGET_GET_CLASS (widget)->size_request (widget, &new_req);
3965
3966     if (old_req.width != new_req.width ||
3967         old_req.height != new_req.height)
3968       {
3969         gtk_widget_queue_resize_no_redraw (widget);
3970       }
3971   }
3972 }
3973
3974 static void
3975 gtk_text_view_realize (GtkWidget *widget)
3976 {
3977   GtkAllocation allocation;
3978   GtkTextView *text_view;
3979   GtkTextViewPrivate *priv;
3980   GdkWindow *window;
3981   GdkWindowAttr attributes;
3982   gint attributes_mask;
3983   GSList *tmp_list;
3984
3985   text_view = GTK_TEXT_VIEW (widget);
3986   priv = text_view->priv;
3987
3988   gtk_widget_set_realized (widget, TRUE);
3989
3990   gtk_widget_get_allocation (widget, &allocation);
3991
3992   attributes.window_type = GDK_WINDOW_CHILD;
3993   attributes.x = allocation.x;
3994   attributes.y = allocation.y;
3995   attributes.width = allocation.width;
3996   attributes.height = allocation.height;
3997   attributes.wclass = GDK_INPUT_OUTPUT;
3998   attributes.visual = gtk_widget_get_visual (widget);
3999   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK | GDK_EXPOSURE_MASK;
4000
4001   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
4002
4003   window = gdk_window_new (gtk_widget_get_parent_window (widget),
4004                            &attributes, attributes_mask);
4005   gtk_widget_set_window (widget, window);
4006   gdk_window_set_user_data (window, widget);
4007
4008   /* must come before text_window_realize calls */
4009   gtk_widget_style_attach (widget);
4010
4011   gdk_window_set_background (window,
4012                              &gtk_widget_get_style (widget)->bg[gtk_widget_get_state (widget)]);
4013
4014   text_window_realize (priv->text_window, widget);
4015
4016   if (priv->left_window)
4017     text_window_realize (priv->left_window, widget);
4018
4019   if (priv->top_window)
4020     text_window_realize (priv->top_window, widget);
4021
4022   if (priv->right_window)
4023     text_window_realize (priv->right_window, widget);
4024
4025   if (priv->bottom_window)
4026     text_window_realize (priv->bottom_window, widget);
4027
4028   gtk_text_view_ensure_layout (text_view);
4029
4030   if (priv->buffer)
4031     {
4032       GtkClipboard *clipboard = gtk_widget_get_clipboard (GTK_WIDGET (text_view),
4033                                                           GDK_SELECTION_PRIMARY);
4034       gtk_text_buffer_add_selection_clipboard (priv->buffer, clipboard);
4035     }
4036
4037   tmp_list = priv->children;
4038   while (tmp_list != NULL)
4039     {
4040       GtkTextViewChild *vc = tmp_list->data;
4041
4042       text_view_child_set_parent_window (text_view, vc);
4043
4044       tmp_list = tmp_list->next;
4045     }
4046
4047   /* Ensure updating the spot location. */
4048   gtk_text_view_update_im_spot_location (text_view);
4049 }
4050
4051 static void
4052 gtk_text_view_unrealize (GtkWidget *widget)
4053 {
4054   GtkTextView *text_view;
4055   GtkTextViewPrivate *priv;
4056
4057   text_view = GTK_TEXT_VIEW (widget);
4058   priv = text_view->priv;
4059
4060   if (priv->buffer)
4061     {
4062       GtkClipboard *clipboard = gtk_widget_get_clipboard (GTK_WIDGET (text_view),
4063                                                           GDK_SELECTION_PRIMARY);
4064       gtk_text_buffer_remove_selection_clipboard (priv->buffer, clipboard);
4065     }
4066
4067   gtk_text_view_remove_validate_idles (text_view);
4068
4069   if (priv->popup_menu)
4070     {
4071       gtk_widget_destroy (priv->popup_menu);
4072       priv->popup_menu = NULL;
4073     }
4074
4075   text_window_unrealize (priv->text_window);
4076
4077   if (priv->left_window)
4078     text_window_unrealize (priv->left_window);
4079
4080   if (priv->top_window)
4081     text_window_unrealize (priv->top_window);
4082
4083   if (priv->right_window)
4084     text_window_unrealize (priv->right_window);
4085
4086   if (priv->bottom_window)
4087     text_window_unrealize (priv->bottom_window);
4088
4089   gtk_text_view_destroy_layout (text_view);
4090
4091   GTK_WIDGET_CLASS (gtk_text_view_parent_class)->unrealize (widget);
4092 }
4093
4094 static void
4095 gtk_text_view_set_background (GtkTextView *text_view)
4096 {
4097   GtkStyle *style;
4098   GtkStateType state;
4099   GtkWidget *widget;
4100   GtkTextViewPrivate *priv;
4101
4102   widget = GTK_WIDGET (text_view);
4103   priv = text_view->priv;
4104
4105   style = gtk_widget_get_style (widget);
4106   state = gtk_widget_get_state (widget);
4107
4108   gdk_window_set_background (gtk_widget_get_window (widget),
4109                              &style->bg[state]);
4110
4111   gdk_window_set_background (priv->text_window->bin_window,
4112                              &style->base[state]);
4113
4114   if (priv->left_window)
4115     gdk_window_set_background (priv->left_window->bin_window,
4116                                &style->bg[state]);
4117   if (priv->right_window)
4118     gdk_window_set_background (priv->right_window->bin_window,
4119                                &style->bg[state]);
4120
4121   if (priv->top_window)
4122     gdk_window_set_background (priv->top_window->bin_window,
4123                                &style->bg[state]);
4124
4125   if (priv->bottom_window)
4126     gdk_window_set_background (priv->bottom_window->bin_window,
4127                                &style->bg[state]);
4128 }
4129
4130 static void
4131 gtk_text_view_style_set (GtkWidget *widget,
4132                          GtkStyle  *previous_style)
4133 {
4134   GtkTextView *text_view;
4135   GtkTextViewPrivate *priv;
4136   PangoContext *ltr_context, *rtl_context;
4137
4138   text_view = GTK_TEXT_VIEW (widget);
4139   priv = text_view->priv;
4140
4141   if (gtk_widget_get_realized (widget))
4142     {
4143       gtk_text_view_set_background (text_view);
4144     }
4145
4146   if (priv->layout && previous_style)
4147     {
4148       gtk_text_view_set_attributes_from_style (text_view,
4149                                                priv->layout->default_style,
4150                                                gtk_widget_get_style (widget));
4151
4152       ltr_context = gtk_widget_create_pango_context (widget);
4153       pango_context_set_base_dir (ltr_context, PANGO_DIRECTION_LTR);
4154       rtl_context = gtk_widget_create_pango_context (widget);
4155       pango_context_set_base_dir (rtl_context, PANGO_DIRECTION_RTL);
4156
4157       gtk_text_layout_set_contexts (priv->layout, ltr_context, rtl_context);
4158
4159       g_object_unref (ltr_context);
4160       g_object_unref (rtl_context);
4161     }
4162 }
4163
4164 static void
4165 gtk_text_view_direction_changed (GtkWidget        *widget,
4166                                  GtkTextDirection  previous_direction)
4167 {
4168   GtkTextViewPrivate *priv = GTK_TEXT_VIEW (widget)->priv;
4169
4170   if (priv->layout)
4171     {
4172       priv->layout->default_style->direction = gtk_widget_get_direction (widget);
4173
4174       gtk_text_layout_default_style_changed (priv->layout);
4175     }
4176 }
4177
4178 static void
4179 gtk_text_view_state_changed (GtkWidget      *widget,
4180                              GtkStateType    previous_state)
4181 {
4182   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
4183   GdkCursor *cursor;
4184
4185   if (gtk_widget_get_realized (widget))
4186     {
4187       gtk_text_view_set_background (text_view);
4188
4189       if (gtk_widget_is_sensitive (widget))
4190         cursor = gdk_cursor_new_for_display (gtk_widget_get_display (widget), GDK_XTERM);
4191       else
4192         cursor = NULL;
4193
4194       gdk_window_set_cursor (text_view->priv->text_window->bin_window, cursor);
4195
4196       if (cursor)
4197       gdk_cursor_unref (cursor);
4198
4199       text_view->priv->mouse_cursor_obscured = FALSE;
4200     }
4201
4202   if (!gtk_widget_is_sensitive (widget))
4203     {
4204       /* Clear any selection */
4205       gtk_text_view_unselect (text_view);
4206     }
4207
4208   gtk_widget_queue_draw (widget);
4209 }
4210
4211 static void
4212 set_invisible_cursor (GdkWindow *window)
4213 {
4214   GdkDisplay *display;
4215   GdkCursor *cursor;
4216
4217   display = gdk_window_get_display (window);
4218   cursor = gdk_cursor_new_for_display (display, GDK_BLANK_CURSOR);
4219
4220   gdk_window_set_cursor (window, cursor);
4221
4222   gdk_cursor_unref (cursor);
4223 }
4224
4225 static void
4226 gtk_text_view_obscure_mouse_cursor (GtkTextView *text_view)
4227 {
4228   if (text_view->priv->mouse_cursor_obscured)
4229     return;
4230
4231   set_invisible_cursor (text_view->priv->text_window->bin_window);
4232
4233   text_view->priv->mouse_cursor_obscured = TRUE;
4234 }
4235
4236 static void
4237 gtk_text_view_unobscure_mouse_cursor (GtkTextView *text_view)
4238 {
4239   if (text_view->priv->mouse_cursor_obscured)
4240     {
4241       GdkCursor *cursor;
4242
4243       cursor = gdk_cursor_new_for_display (gtk_widget_get_display (GTK_WIDGET (text_view)),
4244                                            GDK_XTERM);
4245       gdk_window_set_cursor (text_view->priv->text_window->bin_window, cursor);
4246       gdk_cursor_unref (cursor);
4247       text_view->priv->mouse_cursor_obscured = FALSE;
4248     }
4249 }
4250
4251 static void
4252 gtk_text_view_grab_notify (GtkWidget *widget,
4253                            gboolean   was_grabbed)
4254 {
4255   GtkTextViewPrivate *priv;
4256
4257   priv = GTK_TEXT_VIEW (widget)->priv;
4258
4259   if (priv->grab_device &&
4260       gtk_widget_device_is_shadowed (widget, priv->grab_device))
4261     {
4262       gtk_text_view_end_selection_drag (GTK_TEXT_VIEW (widget));
4263       gtk_text_view_unobscure_mouse_cursor (GTK_TEXT_VIEW (widget));
4264     }
4265 }
4266
4267
4268 /*
4269  * Events
4270  */
4271
4272 static gboolean
4273 get_event_coordinates (GdkEvent *event, gint *x, gint *y)
4274 {
4275   if (event)
4276     switch (event->type)
4277       {
4278       case GDK_MOTION_NOTIFY:
4279         *x = event->motion.x;
4280         *y = event->motion.y;
4281         return TRUE;
4282         break;
4283
4284       case GDK_BUTTON_PRESS:
4285       case GDK_2BUTTON_PRESS:
4286       case GDK_3BUTTON_PRESS:
4287       case GDK_BUTTON_RELEASE:
4288         *x = event->button.x;
4289         *y = event->button.y;
4290         return TRUE;
4291         break;
4292
4293       case GDK_KEY_PRESS:
4294       case GDK_KEY_RELEASE:
4295       case GDK_ENTER_NOTIFY:
4296       case GDK_LEAVE_NOTIFY:
4297       case GDK_PROPERTY_NOTIFY:
4298       case GDK_SELECTION_CLEAR:
4299       case GDK_SELECTION_REQUEST:
4300       case GDK_SELECTION_NOTIFY:
4301       case GDK_PROXIMITY_IN:
4302       case GDK_PROXIMITY_OUT:
4303       case GDK_DRAG_ENTER:
4304       case GDK_DRAG_LEAVE:
4305       case GDK_DRAG_MOTION:
4306       case GDK_DRAG_STATUS:
4307       case GDK_DROP_START:
4308       case GDK_DROP_FINISHED:
4309       default:
4310         return FALSE;
4311         break;
4312       }
4313
4314   return FALSE;
4315 }
4316
4317 static gint
4318 emit_event_on_tags (GtkWidget   *widget,
4319                     GdkEvent    *event,
4320                     GtkTextIter *iter)
4321 {
4322   GSList *tags;
4323   GSList *tmp;
4324   gboolean retval = FALSE;
4325
4326   tags = gtk_text_iter_get_tags (iter);
4327
4328   tmp = tags;
4329   while (tmp != NULL)
4330     {
4331       GtkTextTag *tag = tmp->data;
4332
4333       if (gtk_text_tag_event (tag, G_OBJECT (widget), event, iter))
4334         {
4335           retval = TRUE;
4336           break;
4337         }
4338
4339       tmp = g_slist_next (tmp);
4340     }
4341
4342   g_slist_free (tags);
4343
4344   return retval;
4345 }
4346
4347 static gint
4348 gtk_text_view_event (GtkWidget *widget, GdkEvent *event)
4349 {
4350   GtkTextView *text_view;
4351   GtkTextViewPrivate *priv;
4352   gint x = 0, y = 0;
4353
4354   text_view = GTK_TEXT_VIEW (widget);
4355   priv = text_view->priv;
4356
4357   if (priv->layout == NULL ||
4358       get_buffer (text_view) == NULL)
4359     return FALSE;
4360
4361   if (event->any.window != priv->text_window->bin_window)
4362     return FALSE;
4363
4364   if (get_event_coordinates (event, &x, &y))
4365     {
4366       GtkTextIter iter;
4367
4368       x += priv->xoffset;
4369       y += priv->yoffset;
4370
4371       /* FIXME this is slow and we do it twice per event.
4372        * My favorite solution is to have GtkTextLayout cache
4373        * the last couple lookups.
4374        */
4375       gtk_text_layout_get_iter_at_pixel (priv->layout,
4376                                          &iter,
4377                                          x, y);
4378
4379       return emit_event_on_tags (widget, event, &iter);
4380     }
4381   else if (event->type == GDK_KEY_PRESS ||
4382            event->type == GDK_KEY_RELEASE)
4383     {
4384       GtkTextIter iter;
4385
4386       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter,
4387                                         gtk_text_buffer_get_insert (get_buffer (text_view)));
4388
4389       return emit_event_on_tags (widget, event, &iter);
4390     }
4391   else
4392     return FALSE;
4393 }
4394
4395 static gint
4396 gtk_text_view_key_press_event (GtkWidget *widget, GdkEventKey *event)
4397 {
4398   GtkTextView *text_view;
4399   GtkTextViewPrivate *priv;
4400   GtkTextMark *insert;
4401   GtkTextIter iter;
4402   gboolean can_insert;
4403   gboolean retval = FALSE;
4404   gboolean obscure = FALSE;
4405
4406   text_view = GTK_TEXT_VIEW (widget);
4407   priv = text_view->priv;
4408
4409   if (priv->layout == NULL ||
4410       get_buffer (text_view) == NULL)
4411     return FALSE;
4412
4413   /* Make sure input method knows where it is */
4414   flush_update_im_spot_location (text_view);
4415
4416   insert = gtk_text_buffer_get_insert (get_buffer (text_view));
4417   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
4418   can_insert = gtk_text_iter_can_insert (&iter, priv->editable);
4419   if (gtk_im_context_filter_keypress (priv->im_context, event))
4420     {
4421       priv->need_im_reset = TRUE;
4422       if (!can_insert)
4423         gtk_text_view_reset_im_context (text_view);
4424       obscure = can_insert;
4425       retval = TRUE;
4426     }
4427   /* Binding set */
4428   else if (GTK_WIDGET_CLASS (gtk_text_view_parent_class)->key_press_event (widget, event))
4429     {
4430       retval = TRUE;
4431     }
4432   /* use overall editability not can_insert, more predictable for users */
4433   else if (priv->editable &&
4434            (event->keyval == GDK_KEY_Return ||
4435             event->keyval == GDK_KEY_ISO_Enter ||
4436             event->keyval == GDK_KEY_KP_Enter))
4437     {
4438       /* this won't actually insert the newline if the cursor isn't
4439        * editable
4440        */
4441       gtk_text_view_reset_im_context (text_view);
4442       gtk_text_view_commit_text (text_view, "\n");
4443
4444       obscure = TRUE;
4445       retval = TRUE;
4446     }
4447   /* Pass through Tab as literal tab, unless Control is held down */
4448   else if ((event->keyval == GDK_KEY_Tab ||
4449             event->keyval == GDK_KEY_KP_Tab ||
4450             event->keyval == GDK_KEY_ISO_Left_Tab) &&
4451            !(event->state & GDK_CONTROL_MASK))
4452     {
4453       /* If the text widget isn't editable overall, or if the application
4454        * has turned off "accepts_tab", move the focus instead
4455        */
4456       if (priv->accepts_tab && priv->editable)
4457         {
4458           gtk_text_view_reset_im_context (text_view);
4459           gtk_text_view_commit_text (text_view, "\t");
4460           obscure = TRUE;
4461         }
4462       else
4463         g_signal_emit_by_name (text_view, "move-focus",
4464                                (event->state & GDK_SHIFT_MASK) ?
4465                                GTK_DIR_TAB_BACKWARD : GTK_DIR_TAB_FORWARD);
4466
4467       retval = TRUE;
4468     }
4469   else
4470     retval = FALSE;
4471
4472   if (obscure)
4473     gtk_text_view_obscure_mouse_cursor (text_view);
4474
4475   gtk_text_view_reset_blink_time (text_view);
4476   gtk_text_view_pend_cursor_blink (text_view);
4477
4478   return retval;
4479 }
4480
4481 static gint
4482 gtk_text_view_key_release_event (GtkWidget *widget, GdkEventKey *event)
4483 {
4484   GtkTextView *text_view;
4485   GtkTextViewPrivate *priv;
4486   GtkTextMark *insert;
4487   GtkTextIter iter;
4488
4489   text_view = GTK_TEXT_VIEW (widget);
4490   priv = text_view->priv;
4491
4492   if (priv->layout == NULL || get_buffer (text_view) == NULL)
4493     return FALSE;
4494
4495   insert = gtk_text_buffer_get_insert (get_buffer (text_view));
4496   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
4497   if (gtk_text_iter_can_insert (&iter, priv->editable) &&
4498       gtk_im_context_filter_keypress (priv->im_context, event))
4499     {
4500       priv->need_im_reset = TRUE;
4501       return TRUE;
4502     }
4503   else
4504     return GTK_WIDGET_CLASS (gtk_text_view_parent_class)->key_release_event (widget, event);
4505 }
4506
4507 static gint
4508 gtk_text_view_button_press_event (GtkWidget *widget, GdkEventButton *event)
4509 {
4510   GtkTextView *text_view;
4511   GtkTextViewPrivate *priv;
4512
4513   text_view = GTK_TEXT_VIEW (widget);
4514   priv = text_view->priv;
4515
4516   gtk_widget_grab_focus (widget);
4517
4518   if (event->window != priv->text_window->bin_window)
4519     {
4520       /* Remove selection if any. */
4521       gtk_text_view_unselect (text_view);
4522       return FALSE;
4523     }
4524
4525   gtk_text_view_reset_blink_time (text_view);
4526
4527 #if 0
4528   /* debug hack */
4529   if (event->button == 3 && (event->state & GDK_CONTROL_MASK) != 0)
4530     _gtk_text_buffer_spew (GTK_TEXT_VIEW (widget)->buffer);
4531   else if (event->button == 3)
4532     gtk_text_layout_spew (GTK_TEXT_VIEW (widget)->layout);
4533 #endif
4534
4535   if (event->type == GDK_BUTTON_PRESS)
4536     {
4537       gtk_text_view_reset_im_context (text_view);
4538
4539       if (event->button == 1)
4540         {
4541           /* If we're in the selection, start a drag copy/move of the
4542            * selection; otherwise, start creating a new selection.
4543            */
4544           GtkTextIter iter;
4545           GtkTextIter start, end;
4546
4547           gtk_text_layout_get_iter_at_pixel (priv->layout,
4548                                              &iter,
4549                                              event->x + priv->xoffset,
4550                                              event->y + priv->yoffset);
4551
4552           if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
4553                                                     &start, &end) &&
4554               gtk_text_iter_in_range (&iter, &start, &end) &&
4555               !(event->state & GDK_SHIFT_MASK))
4556             {
4557               priv->drag_start_x = event->x;
4558               priv->drag_start_y = event->y;
4559               priv->pending_place_cursor_button = event->button;
4560             }
4561           else
4562             {
4563               gtk_text_view_start_selection_drag (text_view, &iter, event);
4564             }
4565
4566           return TRUE;
4567         }
4568       else if (event->button == 2)
4569         {
4570           GtkTextIter iter;
4571
4572           /* We do not want to scroll back to the insert iter when we paste
4573              with the middle button */
4574           priv->scroll_after_paste = FALSE;
4575
4576           gtk_text_layout_get_iter_at_pixel (priv->layout,
4577                                              &iter,
4578                                              event->x + priv->xoffset,
4579                                              event->y + priv->yoffset);
4580
4581           gtk_text_buffer_paste_clipboard (get_buffer (text_view),
4582                                            gtk_widget_get_clipboard (widget, GDK_SELECTION_PRIMARY),
4583                                            &iter,
4584                                            priv->editable);
4585           return TRUE;
4586         }
4587       else if (event->button == 3)
4588         {
4589           gtk_text_view_do_popup (text_view, event);
4590           return TRUE;
4591         }
4592     }
4593   else if ((event->type == GDK_2BUTTON_PRESS ||
4594             event->type == GDK_3BUTTON_PRESS) &&
4595            event->button == 1)
4596     {
4597       GtkTextIter iter;
4598
4599       gtk_text_view_end_selection_drag (text_view);
4600
4601       gtk_text_layout_get_iter_at_pixel (priv->layout,
4602                                          &iter,
4603                                          event->x + priv->xoffset,
4604                                          event->y + priv->yoffset);
4605
4606       gtk_text_view_start_selection_drag (text_view, &iter, event);
4607       return TRUE;
4608     }
4609
4610   return FALSE;
4611 }
4612
4613 static gint
4614 gtk_text_view_button_release_event (GtkWidget *widget, GdkEventButton *event)
4615 {
4616   GtkTextView *text_view;
4617   GtkTextViewPrivate *priv;
4618
4619   text_view = GTK_TEXT_VIEW (widget);
4620   priv = text_view->priv;
4621
4622   if (event->window != priv->text_window->bin_window)
4623     return FALSE;
4624
4625   if (event->button == 1)
4626     {
4627       if (priv->drag_start_x >= 0)
4628         {
4629           priv->drag_start_x = -1;
4630           priv->drag_start_y = -1;
4631         }
4632
4633       if (gtk_text_view_end_selection_drag (GTK_TEXT_VIEW (widget)))
4634         return TRUE;
4635       else if (priv->pending_place_cursor_button == event->button)
4636         {
4637           GtkTextIter iter;
4638
4639           /* Unselect everything; we clicked inside selection, but
4640            * didn't move by the drag threshold, so just clear selection
4641            * and place cursor.
4642            */
4643           gtk_text_layout_get_iter_at_pixel (priv->layout,
4644                                              &iter,
4645                                              event->x + priv->xoffset,
4646                                              event->y + priv->yoffset);
4647
4648           gtk_text_buffer_place_cursor (get_buffer (text_view), &iter);
4649           gtk_text_view_check_cursor_blink (text_view);
4650
4651           priv->pending_place_cursor_button = 0;
4652
4653           return FALSE;
4654         }
4655     }
4656
4657   return FALSE;
4658 }
4659
4660 static void
4661 keymap_direction_changed (GdkKeymap   *keymap,
4662                           GtkTextView *text_view)
4663 {
4664   gtk_text_view_check_keymap_direction (text_view);
4665 }
4666
4667 static gint
4668 gtk_text_view_focus_in_event (GtkWidget *widget, GdkEventFocus *event)
4669 {
4670   GtkTextView *text_view;
4671   GtkTextViewPrivate *priv;
4672
4673   text_view = GTK_TEXT_VIEW (widget);
4674   priv = text_view->priv;
4675
4676   gtk_widget_queue_draw (widget);
4677
4678   DV(g_print (G_STRLOC": focus_in_event\n"));
4679
4680   gtk_text_view_reset_blink_time (text_view);
4681
4682   if (priv->cursor_visible && priv->layout)
4683     {
4684       gtk_text_layout_set_cursor_visible (priv->layout, TRUE);
4685       gtk_text_view_check_cursor_blink (text_view);
4686     }
4687
4688   g_signal_connect (gdk_keymap_get_for_display (gtk_widget_get_display (widget)),
4689                     "direction-changed",
4690                     G_CALLBACK (keymap_direction_changed), text_view);
4691   gtk_text_view_check_keymap_direction (text_view);
4692
4693   if (priv->editable)
4694     {
4695       priv->need_im_reset = TRUE;
4696       gtk_im_context_focus_in (priv->im_context);
4697     }
4698
4699   return FALSE;
4700 }
4701
4702 static gint
4703 gtk_text_view_focus_out_event (GtkWidget *widget, GdkEventFocus *event)
4704 {
4705   GtkTextView *text_view;
4706   GtkTextViewPrivate *priv;
4707
4708   text_view = GTK_TEXT_VIEW (widget);
4709   priv = text_view->priv;
4710
4711   gtk_text_view_end_selection_drag (text_view);
4712
4713   gtk_widget_queue_draw (widget);
4714
4715   DV(g_print (G_STRLOC": focus_out_event\n"));
4716
4717   if (priv->cursor_visible && priv->layout)
4718     {
4719       gtk_text_view_check_cursor_blink (text_view);
4720       gtk_text_layout_set_cursor_visible (priv->layout, FALSE);
4721     }
4722
4723   g_signal_handlers_disconnect_by_func (gdk_keymap_get_for_display (gtk_widget_get_display (widget)),
4724                                         keymap_direction_changed,
4725                                         text_view);
4726
4727   if (priv->editable)
4728     {
4729       priv->need_im_reset = TRUE;
4730       gtk_im_context_focus_out (priv->im_context);
4731     }
4732
4733   return FALSE;
4734 }
4735
4736 static gint
4737 gtk_text_view_motion_event (GtkWidget *widget, GdkEventMotion *event)
4738 {
4739   GtkTextView *text_view;
4740   GtkTextViewPrivate *priv;
4741
4742   text_view = GTK_TEXT_VIEW (widget);
4743   priv = text_view->priv;
4744
4745   gtk_text_view_unobscure_mouse_cursor (text_view);
4746
4747   if (event->window == priv->text_window->bin_window &&
4748       priv->drag_start_x >= 0)
4749     {
4750       gint x = event->x;
4751       gint y = event->y;
4752
4753       gdk_event_request_motions (event);
4754
4755       if (gtk_drag_check_threshold (widget,
4756                                     priv->drag_start_x,
4757                                     priv->drag_start_y,
4758                                     x, y))
4759         {
4760           GtkTextIter iter;
4761           gint buffer_x, buffer_y;
4762
4763           gtk_text_view_window_to_buffer_coords (text_view,
4764                                                  GTK_TEXT_WINDOW_TEXT,
4765                                                  priv->drag_start_x,
4766                                                  priv->drag_start_y,
4767                                                  &buffer_x,
4768                                                  &buffer_y);
4769
4770           gtk_text_layout_get_iter_at_pixel (priv->layout,
4771                                              &iter,
4772                                              buffer_x, buffer_y);
4773
4774           gtk_text_view_start_selection_dnd (text_view, &iter, event);
4775           return TRUE;
4776         }
4777     }
4778
4779   return FALSE;
4780 }
4781
4782 static void
4783 gtk_text_view_paint (GtkWidget      *widget,
4784                      GdkRectangle   *area,
4785                      GdkEventExpose *event)
4786 {
4787   GtkTextView *text_view;
4788   GtkTextViewPrivate *priv;
4789   GList *child_exposes;
4790   GList *tmp_list;
4791   cairo_t *cr;
4792
4793   text_view = GTK_TEXT_VIEW (widget);
4794   priv = text_view->priv;
4795
4796   g_return_if_fail (priv->layout != NULL);
4797   g_return_if_fail (priv->xoffset >= 0);
4798   g_return_if_fail (priv->yoffset >= 0);
4799
4800   while (priv->first_validate_idle != 0)
4801     {
4802       DV (g_print (G_STRLOC": first_validate_idle: %d\n",
4803                    priv->first_validate_idle));
4804       gtk_text_view_flush_first_validate (text_view);
4805     }
4806
4807   if (!priv->onscreen_validated)
4808     {
4809       g_warning (G_STRLOC ": somehow some text lines were modified or scrolling occurred since the last validation of lines on the screen - may be a text widget bug.");
4810       g_assert_not_reached ();
4811     }
4812
4813 #if 0
4814   printf ("painting %d,%d  %d x %d\n",
4815           area->x, area->y,
4816           area->width, area->height);
4817 #endif
4818
4819   child_exposes = NULL;
4820
4821   cr = gdk_cairo_create (priv->text_window->bin_window);
4822
4823   gdk_cairo_region (cr, event->region);
4824   cairo_clip (cr);
4825
4826   cairo_translate (cr, -priv->xoffset, -priv->yoffset);
4827
4828   gtk_text_layout_draw (priv->layout,
4829                         widget,
4830                         cr,
4831                         &child_exposes);
4832
4833   cairo_destroy (cr);
4834
4835   tmp_list = child_exposes;
4836   while (tmp_list != NULL)
4837     {
4838       GtkWidget *child = tmp_list->data;
4839
4840       gtk_container_propagate_expose (GTK_CONTAINER (text_view),
4841                                       child,
4842                                       event);
4843
4844       g_object_unref (child);
4845
4846       tmp_list = tmp_list->next;
4847     }
4848
4849   g_list_free (child_exposes);
4850 }
4851
4852 static gint
4853 gtk_text_view_expose_event (GtkWidget *widget, GdkEventExpose *event)
4854 {
4855   GSList *tmp_list;
4856
4857   if (event->window == gtk_text_view_get_window (GTK_TEXT_VIEW (widget),
4858                                                  GTK_TEXT_WINDOW_TEXT))
4859     {
4860       DV(g_print (">Exposed ("G_STRLOC")\n"));
4861       gtk_text_view_paint (widget, &event->area, event);
4862     }
4863
4864   if (event->window == gtk_widget_get_window (widget))
4865     gtk_text_view_draw_focus (widget);
4866
4867   /* Propagate exposes to all unanchored children.
4868    * Anchored children are handled in gtk_text_view_paint().
4869    */
4870   tmp_list = GTK_TEXT_VIEW (widget)->priv->children;
4871   while (tmp_list != NULL)
4872     {
4873       GtkTextViewChild *vc = tmp_list->data;
4874
4875       /* propagate_expose checks that event->window matches
4876        * child->window
4877        */
4878       if (!vc->anchor)
4879         gtk_container_propagate_expose (GTK_CONTAINER (widget),
4880                                         vc->widget,
4881                                         event);
4882
4883       tmp_list = tmp_list->next;
4884     }
4885
4886   return FALSE;
4887 }
4888
4889 static void
4890 gtk_text_view_draw_focus (GtkWidget *widget)
4891 {
4892   GtkAllocation allocation;
4893   GdkWindow *window;
4894   gboolean interior_focus;
4895
4896   /* We clear the focus if we are in interior focus mode. */
4897   gtk_widget_style_get (widget,
4898                         "interior-focus", &interior_focus,
4899                         NULL);
4900
4901   if (gtk_widget_is_drawable (widget))
4902     {
4903       window = gtk_widget_get_window (widget);
4904
4905       if (gtk_widget_has_focus (widget) && !interior_focus)
4906         {
4907           gtk_widget_get_allocation (widget, &allocation);
4908           gtk_paint_focus (gtk_widget_get_style (widget),
4909                            window,
4910                            gtk_widget_get_state (widget),
4911                            NULL, widget, "textview",
4912                            0, 0,
4913                            allocation.width, allocation.height);
4914         }
4915       else
4916         {
4917           gdk_window_clear (window);
4918         }
4919     }
4920 }
4921
4922 static gboolean
4923 gtk_text_view_focus (GtkWidget        *widget,
4924                      GtkDirectionType  direction)
4925 {
4926   GtkContainer *container;
4927   gboolean result;
4928
4929   container = GTK_CONTAINER (widget);
4930
4931   if (!gtk_widget_is_focus (widget) &&
4932       gtk_container_get_focus_child (container) == NULL)
4933     {
4934       gtk_widget_grab_focus (widget);
4935       return TRUE;
4936     }
4937   else
4938     {
4939       /*
4940        * Unset CAN_FOCUS flag so that gtk_container_focus() allows
4941        * children to get the focus
4942        */
4943       gtk_widget_set_can_focus (widget, FALSE);
4944       result = GTK_WIDGET_CLASS (gtk_text_view_parent_class)->focus (widget, direction);
4945       gtk_widget_set_can_focus (widget, TRUE);
4946
4947       return result;
4948     }
4949 }
4950
4951 static void
4952 gtk_text_view_move_focus (GtkWidget        *widget,
4953                           GtkDirectionType  direction_type)
4954 {
4955   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
4956
4957   if (GTK_TEXT_VIEW_GET_CLASS (text_view)->move_focus)
4958     GTK_TEXT_VIEW_GET_CLASS (text_view)->move_focus (text_view,
4959                                                      direction_type);
4960 }
4961
4962 /*
4963  * Container
4964  */
4965
4966 static void
4967 gtk_text_view_add (GtkContainer *container,
4968                    GtkWidget    *child)
4969 {
4970   /* This is pretty random. */
4971   gtk_text_view_add_child_in_window (GTK_TEXT_VIEW (container),
4972                                      child,
4973                                      GTK_TEXT_WINDOW_WIDGET,
4974                                      0, 0);
4975 }
4976
4977 static void
4978 gtk_text_view_remove (GtkContainer *container,
4979                       GtkWidget    *child)
4980 {
4981   GtkTextView *text_view;
4982   GtkTextViewPrivate *priv;
4983   GtkTextViewChild *vc;
4984   GSList *iter;
4985
4986   text_view = GTK_TEXT_VIEW (container);
4987   priv = text_view->priv;
4988
4989   vc = NULL;
4990   iter = priv->children;
4991
4992   while (iter != NULL)
4993     {
4994       vc = iter->data;
4995
4996       if (vc->widget == child)
4997         break;
4998
4999       iter = g_slist_next (iter);
5000     }
5001
5002   g_assert (iter != NULL); /* be sure we had the child in the list */
5003
5004   priv->children = g_slist_remove (priv->children, vc);
5005
5006   gtk_widget_unparent (vc->widget);
5007
5008   text_view_child_free (vc);
5009 }
5010
5011 static void
5012 gtk_text_view_forall (GtkContainer *container,
5013                       gboolean      include_internals,
5014                       GtkCallback   callback,
5015                       gpointer      callback_data)
5016 {
5017   GSList *iter;
5018   GtkTextView *text_view;
5019   GSList *copy;
5020
5021   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
5022   g_return_if_fail (callback != NULL);
5023
5024   text_view = GTK_TEXT_VIEW (container);
5025
5026   copy = g_slist_copy (text_view->priv->children);
5027   iter = copy;
5028
5029   while (iter != NULL)
5030     {
5031       GtkTextViewChild *vc = iter->data;
5032
5033       (* callback) (vc->widget, callback_data);
5034
5035       iter = g_slist_next (iter);
5036     }
5037
5038   g_slist_free (copy);
5039 }
5040
5041 #define CURSOR_ON_MULTIPLIER 2
5042 #define CURSOR_OFF_MULTIPLIER 1
5043 #define CURSOR_PEND_MULTIPLIER 3
5044 #define CURSOR_DIVIDER 3
5045
5046 static gboolean
5047 cursor_blinks (GtkTextView *text_view)
5048 {
5049   GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
5050   gboolean blink;
5051
5052 #ifdef DEBUG_VALIDATION_AND_SCROLLING
5053   return FALSE;
5054 #endif
5055   if (gtk_get_debug_flags () & GTK_DEBUG_UPDATES)
5056     return FALSE;
5057
5058   g_object_get (settings, "gtk-cursor-blink", &blink, NULL);
5059
5060   if (!blink)
5061     return FALSE;
5062
5063   if (text_view->priv->editable)
5064     {
5065       GtkTextMark *insert;
5066       GtkTextIter iter;
5067
5068       insert = gtk_text_buffer_get_insert (get_buffer (text_view));
5069       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
5070
5071       if (gtk_text_iter_editable (&iter, text_view->priv->editable))
5072         return blink;
5073     }
5074
5075   return FALSE;
5076 }
5077
5078 static gint
5079 get_cursor_time (GtkTextView *text_view)
5080 {
5081   GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
5082   gint time;
5083
5084   g_object_get (settings, "gtk-cursor-blink-time", &time, NULL);
5085
5086   return time;
5087 }
5088
5089 static gint
5090 get_cursor_blink_timeout (GtkTextView *text_view)
5091 {
5092   GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
5093   gint time;
5094
5095   g_object_get (settings, "gtk-cursor-blink-timeout", &time, NULL);
5096
5097   return time;
5098 }
5099
5100
5101 /*
5102  * Blink!
5103  */
5104
5105 static gint
5106 blink_cb (gpointer data)
5107 {
5108   GtkTextView *text_view;
5109   GtkTextViewPrivate *priv;
5110   gboolean visible;
5111   gint blink_timeout;
5112
5113   text_view = GTK_TEXT_VIEW (data);
5114   priv = text_view->priv;
5115
5116   if (!gtk_widget_has_focus (GTK_WIDGET (text_view)))
5117     {
5118       g_warning ("GtkTextView - did not receive focus-out-event. If you\n"
5119                  "connect a handler to this signal, it must return\n"
5120                  "FALSE so the text view gets the event as well");
5121
5122       gtk_text_view_check_cursor_blink (text_view);
5123
5124       return FALSE;
5125     }
5126
5127   g_assert (priv->layout);
5128   g_assert (priv->cursor_visible);
5129
5130   visible = gtk_text_layout_get_cursor_visible (priv->layout);
5131
5132   blink_timeout = get_cursor_blink_timeout (text_view);
5133   if (priv->blink_time > 1000 * blink_timeout &&
5134       blink_timeout < G_MAXINT/1000)
5135     {
5136       /* we've blinked enough without the user doing anything, stop blinking */
5137       visible = 0;
5138       priv->blink_timeout = 0;
5139     }
5140   else if (visible)
5141     priv->blink_timeout = gdk_threads_add_timeout (get_cursor_time (text_view) * CURSOR_OFF_MULTIPLIER / CURSOR_DIVIDER,
5142                                                    blink_cb,
5143                                                    text_view);
5144   else
5145     {
5146       priv->blink_timeout = gdk_threads_add_timeout (get_cursor_time (text_view) * CURSOR_ON_MULTIPLIER / CURSOR_DIVIDER,
5147                                                      blink_cb,
5148                                                      text_view);
5149       priv->blink_time += get_cursor_time (text_view);
5150     }
5151
5152   /* Block changed_handler while changing the layout's cursor visibility
5153    * because it would expose the whole paragraph. Instead, we expose
5154    * the cursor's area(s) manually below.
5155    */
5156   g_signal_handlers_block_by_func (priv->layout,
5157                                    changed_handler,
5158                                    text_view);
5159   gtk_text_layout_set_cursor_visible (priv->layout, !visible);
5160   g_signal_handlers_unblock_by_func (priv->layout,
5161                                      changed_handler,
5162                                      text_view);
5163
5164   text_window_invalidate_cursors (priv->text_window);
5165
5166   /* Remove ourselves */
5167   return FALSE;
5168 }
5169
5170
5171 static void
5172 gtk_text_view_stop_cursor_blink (GtkTextView *text_view)
5173 {
5174   if (text_view->priv->blink_timeout)
5175     {
5176       g_source_remove (text_view->priv->blink_timeout);
5177       text_view->priv->blink_timeout = 0;
5178     }
5179 }
5180
5181 static void
5182 gtk_text_view_check_cursor_blink (GtkTextView *text_view)
5183 {
5184   GtkTextViewPrivate *priv = text_view->priv;
5185
5186   if (priv->layout != NULL &&
5187       priv->cursor_visible &&
5188       gtk_widget_has_focus (GTK_WIDGET (text_view)))
5189     {
5190       if (cursor_blinks (text_view))
5191         {
5192           if (priv->blink_timeout == 0)
5193             {
5194               gtk_text_layout_set_cursor_visible (priv->layout, TRUE);
5195
5196               priv->blink_timeout = gdk_threads_add_timeout (get_cursor_time (text_view) * CURSOR_OFF_MULTIPLIER / CURSOR_DIVIDER,
5197                                                              blink_cb,
5198                                                              text_view);
5199             }
5200         }
5201       else
5202         {
5203           gtk_text_view_stop_cursor_blink (text_view);
5204           gtk_text_layout_set_cursor_visible (priv->layout, TRUE);
5205         }
5206     }
5207   else
5208     {
5209       gtk_text_view_stop_cursor_blink (text_view);
5210       gtk_text_layout_set_cursor_visible (priv->layout, FALSE);
5211     }
5212 }
5213
5214 static void
5215 gtk_text_view_pend_cursor_blink (GtkTextView *text_view)
5216 {
5217   GtkTextViewPrivate *priv = text_view->priv;
5218
5219   if (priv->layout != NULL &&
5220       priv->cursor_visible &&
5221       gtk_widget_has_focus (GTK_WIDGET (text_view)) &&
5222       cursor_blinks (text_view))
5223     {
5224       gtk_text_view_stop_cursor_blink (text_view);
5225       gtk_text_layout_set_cursor_visible (priv->layout, TRUE);
5226
5227       priv->blink_timeout = gdk_threads_add_timeout (get_cursor_time (text_view) * CURSOR_PEND_MULTIPLIER / CURSOR_DIVIDER,
5228                                                      blink_cb,
5229                                                      text_view);
5230     }
5231 }
5232
5233 static void
5234 gtk_text_view_reset_blink_time (GtkTextView *text_view)
5235 {
5236   GtkTextViewPrivate *priv = text_view->priv;
5237
5238   priv->blink_time = 0;
5239 }
5240
5241
5242 /*
5243  * Key binding handlers
5244  */
5245
5246 static gboolean
5247 gtk_text_view_move_iter_by_lines (GtkTextView *text_view,
5248                                   GtkTextIter *newplace,
5249                                   gint         count)
5250 {
5251   gboolean ret = TRUE;
5252
5253   while (count < 0)
5254     {
5255       ret = gtk_text_layout_move_iter_to_previous_line (text_view->priv->layout, newplace);
5256       count++;
5257     }
5258
5259   while (count > 0)
5260     {
5261       ret = gtk_text_layout_move_iter_to_next_line (text_view->priv->layout, newplace);
5262       count--;
5263     }
5264
5265   return ret;
5266 }
5267
5268 static void
5269 move_cursor (GtkTextView       *text_view,
5270              const GtkTextIter *new_location,
5271              gboolean           extend_selection)
5272 {
5273   if (extend_selection)
5274     gtk_text_buffer_move_mark_by_name (get_buffer (text_view),
5275                                        "insert",
5276                                        new_location);
5277   else
5278       gtk_text_buffer_place_cursor (get_buffer (text_view),
5279                                     new_location);
5280   gtk_text_view_check_cursor_blink (text_view);
5281 }
5282
5283 static void
5284 gtk_text_view_move_cursor_internal (GtkTextView     *text_view,
5285                                     GtkMovementStep  step,
5286                                     gint             count,
5287                                     gboolean         extend_selection)
5288 {
5289   GtkTextViewPrivate *priv;
5290   GtkTextIter insert;
5291   GtkTextIter newplace;
5292   gboolean cancel_selection = FALSE;
5293   gint cursor_x_pos = 0;
5294   GtkDirectionType leave_direction = -1;
5295
5296   priv = text_view->priv;
5297
5298   if (!priv->cursor_visible)
5299     {
5300       GtkScrollStep scroll_step;
5301
5302       switch (step)
5303         {
5304         case GTK_MOVEMENT_VISUAL_POSITIONS:
5305           leave_direction = count > 0 ? GTK_DIR_RIGHT : GTK_DIR_LEFT;
5306           /* fall through */
5307         case GTK_MOVEMENT_LOGICAL_POSITIONS:
5308         case GTK_MOVEMENT_WORDS:
5309           scroll_step = GTK_SCROLL_HORIZONTAL_STEPS;
5310           break;
5311         case GTK_MOVEMENT_DISPLAY_LINE_ENDS:
5312           scroll_step = GTK_SCROLL_HORIZONTAL_ENDS;
5313           break;
5314         case GTK_MOVEMENT_DISPLAY_LINES:
5315           leave_direction = count > 0 ? GTK_DIR_DOWN : GTK_DIR_UP;
5316           /* fall through */
5317         case GTK_MOVEMENT_PARAGRAPHS:
5318         case GTK_MOVEMENT_PARAGRAPH_ENDS:
5319           scroll_step = GTK_SCROLL_STEPS;
5320           break;
5321         case GTK_MOVEMENT_PAGES:
5322           scroll_step = GTK_SCROLL_PAGES;
5323           break;
5324         case GTK_MOVEMENT_HORIZONTAL_PAGES:
5325           scroll_step = GTK_SCROLL_HORIZONTAL_PAGES;
5326           break;
5327         case GTK_MOVEMENT_BUFFER_ENDS:
5328           scroll_step = GTK_SCROLL_ENDS;
5329           break;
5330         default:
5331           scroll_step = GTK_SCROLL_PAGES;
5332           break;
5333         }
5334
5335       if (!gtk_text_view_move_viewport (text_view, scroll_step, count))
5336         {
5337           if (leave_direction != -1 &&
5338               !gtk_widget_keynav_failed (GTK_WIDGET (text_view),
5339                                          leave_direction))
5340             {
5341               g_signal_emit_by_name (text_view, "move-focus", leave_direction);
5342             }
5343         }
5344
5345       return;
5346     }
5347
5348   gtk_text_view_reset_im_context (text_view);
5349
5350   if (step == GTK_MOVEMENT_PAGES)
5351     {
5352       if (!gtk_text_view_scroll_pages (text_view, count, extend_selection))
5353         gtk_widget_error_bell (GTK_WIDGET (text_view));
5354
5355       gtk_text_view_check_cursor_blink (text_view);
5356       gtk_text_view_pend_cursor_blink (text_view);
5357       return;
5358     }
5359   else if (step == GTK_MOVEMENT_HORIZONTAL_PAGES)
5360     {
5361       if (!gtk_text_view_scroll_hpages (text_view, count, extend_selection))
5362         gtk_widget_error_bell (GTK_WIDGET (text_view));
5363
5364       gtk_text_view_check_cursor_blink (text_view);
5365       gtk_text_view_pend_cursor_blink (text_view);
5366       return;
5367     }
5368
5369   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
5370                                     gtk_text_buffer_get_insert (get_buffer (text_view)));
5371
5372   if (! extend_selection)
5373     {
5374       GtkTextIter sel_bound;
5375
5376       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &sel_bound,
5377                                         gtk_text_buffer_get_selection_bound (get_buffer (text_view)));
5378
5379       /* if we move forward, assume the cursor is at the end of the selection;
5380        * if we move backward, assume the cursor is at the start
5381        */
5382       if (count > 0)
5383         gtk_text_iter_order (&sel_bound, &insert);
5384       else
5385         gtk_text_iter_order (&insert, &sel_bound);
5386
5387       /* if we actually have a selection, just move *to* the beginning/end
5388        * of the selection and not *from* there on LOGICAL_POSITIONS
5389        * and VISUAL_POSITIONS movement
5390        */
5391       if (! gtk_text_iter_equal (&sel_bound, &insert))
5392         cancel_selection = TRUE;
5393     }
5394
5395   newplace = insert;
5396
5397   if (step == GTK_MOVEMENT_DISPLAY_LINES)
5398     gtk_text_view_get_virtual_cursor_pos (text_view, &insert, &cursor_x_pos, NULL);
5399
5400   switch (step)
5401     {
5402     case GTK_MOVEMENT_LOGICAL_POSITIONS:
5403       if (! cancel_selection)
5404         gtk_text_iter_forward_visible_cursor_positions (&newplace, count);
5405       break;
5406
5407     case GTK_MOVEMENT_VISUAL_POSITIONS:
5408       if (! cancel_selection)
5409         gtk_text_layout_move_iter_visually (priv->layout,
5410                                             &newplace, count);
5411       break;
5412
5413     case GTK_MOVEMENT_WORDS:
5414       if (count < 0)
5415         gtk_text_iter_backward_visible_word_starts (&newplace, -count);
5416       else if (count > 0)
5417         {
5418           if (!gtk_text_iter_forward_visible_word_ends (&newplace, count))
5419             gtk_text_iter_forward_to_line_end (&newplace);
5420         }
5421       break;
5422
5423     case GTK_MOVEMENT_DISPLAY_LINES:
5424       if (count < 0)
5425         {
5426           leave_direction = GTK_DIR_UP;
5427
5428           if (gtk_text_view_move_iter_by_lines (text_view, &newplace, count))
5429             gtk_text_layout_move_iter_to_x (priv->layout, &newplace, cursor_x_pos);
5430           else
5431             gtk_text_iter_set_line_offset (&newplace, 0);
5432         }
5433       if (count > 0)
5434         {
5435           leave_direction = GTK_DIR_DOWN;
5436
5437           if (gtk_text_view_move_iter_by_lines (text_view, &newplace, count))
5438             gtk_text_layout_move_iter_to_x (priv->layout, &newplace, cursor_x_pos);
5439           else
5440             gtk_text_iter_forward_to_line_end (&newplace);
5441         }
5442       break;
5443
5444     case GTK_MOVEMENT_DISPLAY_LINE_ENDS:
5445       if (count > 1)
5446         gtk_text_view_move_iter_by_lines (text_view, &newplace, --count);
5447       else if (count < -1)
5448         gtk_text_view_move_iter_by_lines (text_view, &newplace, ++count);
5449
5450       if (count != 0)
5451         gtk_text_layout_move_iter_to_line_end (priv->layout, &newplace, count);
5452       break;
5453
5454     case GTK_MOVEMENT_PARAGRAPHS:
5455       if (count > 0)
5456         {
5457           if (!gtk_text_iter_ends_line (&newplace))
5458             {
5459               gtk_text_iter_forward_to_line_end (&newplace);
5460               --count;
5461             }
5462           gtk_text_iter_forward_visible_lines (&newplace, count);
5463           gtk_text_iter_forward_to_line_end (&newplace);
5464         }
5465       else if (count < 0)
5466         {
5467           if (gtk_text_iter_get_line_offset (&newplace) > 0)
5468             gtk_text_iter_set_line_offset (&newplace, 0);
5469           gtk_text_iter_forward_visible_lines (&newplace, count);
5470           gtk_text_iter_set_line_offset (&newplace, 0);
5471         }
5472       break;
5473
5474     case GTK_MOVEMENT_PARAGRAPH_ENDS:
5475       if (count > 0)
5476         {
5477           if (!gtk_text_iter_ends_line (&newplace))
5478             gtk_text_iter_forward_to_line_end (&newplace);
5479         }
5480       else if (count < 0)
5481         {
5482           gtk_text_iter_set_line_offset (&newplace, 0);
5483         }
5484       break;
5485
5486     case GTK_MOVEMENT_BUFFER_ENDS:
5487       if (count > 0)
5488         gtk_text_buffer_get_end_iter (get_buffer (text_view), &newplace);
5489       else if (count < 0)
5490         gtk_text_buffer_get_iter_at_offset (get_buffer (text_view), &newplace, 0);
5491      break;
5492
5493     default:
5494       break;
5495     }
5496
5497   /* call move_cursor() even if the cursor hasn't moved, since it
5498      cancels the selection
5499   */
5500   move_cursor (text_view, &newplace, extend_selection);
5501
5502   if (!gtk_text_iter_equal (&insert, &newplace))
5503     {
5504       DV(g_print (G_STRLOC": scrolling onscreen\n"));
5505       gtk_text_view_scroll_mark_onscreen (text_view,
5506                                           gtk_text_buffer_get_insert (get_buffer (text_view)));
5507
5508       if (step == GTK_MOVEMENT_DISPLAY_LINES)
5509         gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, -1);
5510     }
5511   else if (leave_direction != -1)
5512     {
5513       if (!gtk_widget_keynav_failed (GTK_WIDGET (text_view),
5514                                      leave_direction))
5515         {
5516           g_signal_emit_by_name (text_view, "move-focus", leave_direction);
5517         }
5518     }
5519   else if (! cancel_selection)
5520     {
5521       gtk_widget_error_bell (GTK_WIDGET (text_view));
5522     }
5523
5524   gtk_text_view_check_cursor_blink (text_view);
5525   gtk_text_view_pend_cursor_blink (text_view);
5526 }
5527
5528 static void
5529 gtk_text_view_move_cursor (GtkTextView     *text_view,
5530                            GtkMovementStep  step,
5531                            gint             count,
5532                            gboolean         extend_selection)
5533 {
5534   gtk_text_view_move_cursor_internal (text_view, step, count, extend_selection);
5535 }
5536
5537 static gboolean
5538 gtk_text_view_move_viewport (GtkTextView     *text_view,
5539                              GtkScrollStep    step,
5540                              gint             count)
5541 {
5542   GtkAdjustment *adjustment;
5543   gdouble increment;
5544
5545   switch (step)
5546     {
5547     case GTK_SCROLL_STEPS:
5548     case GTK_SCROLL_PAGES:
5549     case GTK_SCROLL_ENDS:
5550       adjustment = get_vadjustment (text_view);
5551       break;
5552     case GTK_SCROLL_HORIZONTAL_STEPS:
5553     case GTK_SCROLL_HORIZONTAL_PAGES:
5554     case GTK_SCROLL_HORIZONTAL_ENDS:
5555       adjustment = get_hadjustment (text_view);
5556       break;
5557     default:
5558       adjustment = get_vadjustment (text_view);
5559       break;
5560     }
5561
5562   switch (step)
5563     {
5564     case GTK_SCROLL_STEPS:
5565     case GTK_SCROLL_HORIZONTAL_STEPS:
5566       increment = adjustment->step_increment;
5567       break;
5568     case GTK_SCROLL_PAGES:
5569     case GTK_SCROLL_HORIZONTAL_PAGES:
5570       increment = adjustment->page_increment;
5571       break;
5572     case GTK_SCROLL_ENDS:
5573     case GTK_SCROLL_HORIZONTAL_ENDS:
5574       increment = adjustment->upper - adjustment->lower;
5575       break;
5576     default:
5577       increment = 0.0;
5578       break;
5579     }
5580
5581   return set_adjustment_clamped (adjustment, adjustment->value + count * increment);
5582 }
5583
5584 static void
5585 gtk_text_view_set_anchor (GtkTextView *text_view)
5586 {
5587   GtkTextIter insert;
5588
5589   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
5590                                     gtk_text_buffer_get_insert (get_buffer (text_view)));
5591
5592   gtk_text_buffer_create_mark (get_buffer (text_view), "anchor", &insert, TRUE);
5593 }
5594
5595 static gboolean
5596 gtk_text_view_scroll_pages (GtkTextView *text_view,
5597                             gint         count,
5598                             gboolean     extend_selection)
5599 {
5600   GtkTextViewPrivate *priv;
5601   GtkAdjustment *adj;
5602   gint cursor_x_pos, cursor_y_pos;
5603   GtkTextMark *insert_mark;
5604   GtkTextIter old_insert;
5605   GtkTextIter new_insert;
5606   GtkTextIter anchor;
5607   gdouble newval;
5608   gdouble oldval;
5609   gint y0, y1;
5610
5611   priv = text_view->priv;
5612
5613   g_return_val_if_fail (priv->vadjustment != NULL, FALSE);
5614
5615   adj = priv->vadjustment;
5616
5617   insert_mark = gtk_text_buffer_get_insert (get_buffer (text_view));
5618
5619   /* Make sure we start from the current cursor position, even
5620    * if it was offscreen, but don't queue more scrolls if we're
5621    * already behind.
5622    */
5623   if (priv->pending_scroll)
5624     cancel_pending_scroll (text_view);
5625   else
5626     gtk_text_view_scroll_mark_onscreen (text_view, insert_mark);
5627
5628   /* Validate the region that will be brought into view by the cursor motion
5629    */
5630   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
5631                                     &old_insert, insert_mark);
5632
5633   if (count < 0)
5634     {
5635       gtk_text_view_get_first_para_iter (text_view, &anchor);
5636       y0 = adj->page_size;
5637       y1 = adj->page_size + count * adj->page_increment;
5638     }
5639   else
5640     {
5641       gtk_text_view_get_first_para_iter (text_view, &anchor);
5642       y0 = count * adj->page_increment + adj->page_size;
5643       y1 = 0;
5644     }
5645
5646   gtk_text_layout_validate_yrange (priv->layout, &anchor, y0, y1);
5647   /* FIXME do we need to update the adjustment ranges here? */
5648
5649   new_insert = old_insert;
5650
5651   if (count < 0 && adj->value <= (adj->lower + 1e-12))
5652     {
5653       /* already at top, just be sure we are at offset 0 */
5654       gtk_text_buffer_get_start_iter (get_buffer (text_view), &new_insert);
5655       move_cursor (text_view, &new_insert, extend_selection);
5656     }
5657   else if (count > 0 && adj->value >= (adj->upper - adj->page_size - 1e-12))
5658     {
5659       /* already at bottom, just be sure we are at the end */
5660       gtk_text_buffer_get_end_iter (get_buffer (text_view), &new_insert);
5661       move_cursor (text_view, &new_insert, extend_selection);
5662     }
5663   else
5664     {
5665       gtk_text_view_get_virtual_cursor_pos (text_view, NULL, &cursor_x_pos, &cursor_y_pos);
5666
5667       oldval = adj->value;
5668       newval = adj->value;
5669
5670       newval += count * adj->page_increment;
5671
5672       set_adjustment_clamped (adj, newval);
5673       cursor_y_pos += adj->value - oldval;
5674
5675       gtk_text_layout_get_iter_at_pixel (priv->layout, &new_insert, cursor_x_pos, cursor_y_pos);
5676       clamp_iter_onscreen (text_view, &new_insert);
5677       move_cursor (text_view, &new_insert, extend_selection);
5678
5679       gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, cursor_y_pos);
5680     }
5681
5682   /* Adjust to have the cursor _entirely_ onscreen, move_mark_onscreen
5683    * only guarantees 1 pixel onscreen.
5684    */
5685   DV(g_print (G_STRLOC": scrolling onscreen\n"));
5686   gtk_text_view_scroll_mark_onscreen (text_view, insert_mark);
5687
5688   return !gtk_text_iter_equal (&old_insert, &new_insert);
5689 }
5690
5691 static gboolean
5692 gtk_text_view_scroll_hpages (GtkTextView *text_view,
5693                              gint         count,
5694                              gboolean     extend_selection)
5695 {
5696   GtkTextViewPrivate *priv;
5697   GtkAdjustment *adj;
5698   gint cursor_x_pos, cursor_y_pos;
5699   GtkTextMark *insert_mark;
5700   GtkTextIter old_insert;
5701   GtkTextIter new_insert;
5702   gdouble newval;
5703   gdouble oldval;
5704   gint y, height;
5705
5706   priv = text_view->priv;
5707
5708   g_return_val_if_fail (priv->hadjustment != NULL, FALSE);
5709
5710   adj = priv->hadjustment;
5711
5712   insert_mark = gtk_text_buffer_get_insert (get_buffer (text_view));
5713
5714   /* Make sure we start from the current cursor position, even
5715    * if it was offscreen, but don't queue more scrolls if we're
5716    * already behind.
5717    */
5718   if (priv->pending_scroll)
5719     cancel_pending_scroll (text_view);
5720   else
5721     gtk_text_view_scroll_mark_onscreen (text_view, insert_mark);
5722
5723   /* Validate the line that we're moving within.
5724    */
5725   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
5726                                     &old_insert, insert_mark);
5727
5728   gtk_text_layout_get_line_yrange (priv->layout, &old_insert, &y, &height);
5729   gtk_text_layout_validate_yrange (priv->layout, &old_insert, y, y + height);
5730   /* FIXME do we need to update the adjustment ranges here? */
5731
5732   new_insert = old_insert;
5733
5734   if (count < 0 && adj->value <= (adj->lower + 1e-12))
5735     {
5736       /* already at far left, just be sure we are at offset 0 */
5737       gtk_text_iter_set_line_offset (&new_insert, 0);
5738       move_cursor (text_view, &new_insert, extend_selection);
5739     }
5740   else if (count > 0 && adj->value >= (adj->upper - adj->page_size - 1e-12))
5741     {
5742       /* already at far right, just be sure we are at the end */
5743       if (!gtk_text_iter_ends_line (&new_insert))
5744           gtk_text_iter_forward_to_line_end (&new_insert);
5745       move_cursor (text_view, &new_insert, extend_selection);
5746     }
5747   else
5748     {
5749       gtk_text_view_get_virtual_cursor_pos (text_view, NULL, &cursor_x_pos, &cursor_y_pos);
5750
5751       oldval = adj->value;
5752       newval = adj->value;
5753
5754       newval += count * adj->page_increment;
5755
5756       set_adjustment_clamped (adj, newval);
5757       cursor_x_pos += adj->value - oldval;
5758
5759       gtk_text_layout_get_iter_at_pixel (priv->layout, &new_insert, cursor_x_pos, cursor_y_pos);
5760       clamp_iter_onscreen (text_view, &new_insert);
5761       move_cursor (text_view, &new_insert, extend_selection);
5762
5763       gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, cursor_y_pos);
5764     }
5765
5766   /*  FIXME for lines shorter than the overall widget width, this results in a
5767    *  "bounce" effect as we scroll to the right of the widget, then scroll
5768    *  back to get the end of the line onscreen.
5769    *      http://bugzilla.gnome.org/show_bug.cgi?id=68963
5770    */
5771
5772   /* Adjust to have the cursor _entirely_ onscreen, move_mark_onscreen
5773    * only guarantees 1 pixel onscreen.
5774    */
5775   DV(g_print (G_STRLOC": scrolling onscreen\n"));
5776   gtk_text_view_scroll_mark_onscreen (text_view, insert_mark);
5777
5778   return !gtk_text_iter_equal (&old_insert, &new_insert);
5779 }
5780
5781 static gboolean
5782 whitespace (gunichar ch, gpointer user_data)
5783 {
5784   return (ch == ' ' || ch == '\t');
5785 }
5786
5787 static gboolean
5788 not_whitespace (gunichar ch, gpointer user_data)
5789 {
5790   return !whitespace (ch, user_data);
5791 }
5792
5793 static gboolean
5794 find_whitepace_region (const GtkTextIter *center,
5795                        GtkTextIter *start, GtkTextIter *end)
5796 {
5797   *start = *center;
5798   *end = *center;
5799
5800   if (gtk_text_iter_backward_find_char (start, not_whitespace, NULL, NULL))
5801     gtk_text_iter_forward_char (start); /* we want the first whitespace... */
5802   if (whitespace (gtk_text_iter_get_char (end), NULL))
5803     gtk_text_iter_forward_find_char (end, not_whitespace, NULL, NULL);
5804
5805   return !gtk_text_iter_equal (start, end);
5806 }
5807
5808 static void
5809 gtk_text_view_insert_at_cursor (GtkTextView *text_view,
5810                                 const gchar *str)
5811 {
5812   if (!gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
5813                                                      text_view->priv->editable))
5814     {
5815       gtk_widget_error_bell (GTK_WIDGET (text_view));
5816     }
5817 }
5818
5819 static void
5820 gtk_text_view_delete_from_cursor (GtkTextView   *text_view,
5821                                   GtkDeleteType  type,
5822                                   gint           count)
5823 {
5824   GtkTextViewPrivate *priv;
5825   GtkTextIter insert;
5826   GtkTextIter start;
5827   GtkTextIter end;
5828   gboolean leave_one = FALSE;
5829
5830   priv = text_view->priv;
5831
5832   gtk_text_view_reset_im_context (text_view);
5833
5834   if (type == GTK_DELETE_CHARS)
5835     {
5836       /* Char delete deletes the selection, if one exists */
5837       if (gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
5838                                             priv->editable))
5839         return;
5840     }
5841
5842   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
5843                                     gtk_text_buffer_get_insert (get_buffer (text_view)));
5844
5845   start = insert;
5846   end = insert;
5847
5848   switch (type)
5849     {
5850     case GTK_DELETE_CHARS:
5851       gtk_text_iter_forward_cursor_positions (&end, count);
5852       break;
5853
5854     case GTK_DELETE_WORD_ENDS:
5855       if (count > 0)
5856         gtk_text_iter_forward_word_ends (&end, count);
5857       else if (count < 0)
5858         gtk_text_iter_backward_word_starts (&start, 0 - count);
5859       break;
5860
5861     case GTK_DELETE_WORDS:
5862       break;
5863
5864     case GTK_DELETE_DISPLAY_LINE_ENDS:
5865       break;
5866
5867     case GTK_DELETE_DISPLAY_LINES:
5868       break;
5869
5870     case GTK_DELETE_PARAGRAPH_ENDS:
5871       if (count > 0)
5872         {
5873           /* If we're already at a newline, we need to
5874            * simply delete that newline, instead of
5875            * moving to the next one.
5876            */
5877           if (gtk_text_iter_ends_line (&end))
5878             {
5879               gtk_text_iter_forward_line (&end);
5880               --count;
5881             }
5882
5883           while (count > 0)
5884             {
5885               if (!gtk_text_iter_forward_to_line_end (&end))
5886                 break;
5887
5888               --count;
5889             }
5890         }
5891       else if (count < 0)
5892         {
5893           if (gtk_text_iter_starts_line (&start))
5894             {
5895               gtk_text_iter_backward_line (&start);
5896               if (!gtk_text_iter_ends_line (&end))
5897                 gtk_text_iter_forward_to_line_end (&start);
5898             }
5899           else
5900             {
5901               gtk_text_iter_set_line_offset (&start, 0);
5902             }
5903           ++count;
5904
5905           gtk_text_iter_backward_lines (&start, -count);
5906         }
5907       break;
5908
5909     case GTK_DELETE_PARAGRAPHS:
5910       if (count > 0)
5911         {
5912           gtk_text_iter_set_line_offset (&start, 0);
5913           gtk_text_iter_forward_to_line_end (&end);
5914
5915           /* Do the lines beyond the first. */
5916           while (count > 1)
5917             {
5918               gtk_text_iter_forward_to_line_end (&end);
5919
5920               --count;
5921             }
5922         }
5923
5924       /* FIXME negative count? */
5925
5926       break;
5927
5928     case GTK_DELETE_WHITESPACE:
5929       {
5930         find_whitepace_region (&insert, &start, &end);
5931       }
5932       break;
5933
5934     default:
5935       break;
5936     }
5937
5938   if (!gtk_text_iter_equal (&start, &end))
5939     {
5940       gtk_text_buffer_begin_user_action (get_buffer (text_view));
5941
5942       if (gtk_text_buffer_delete_interactive (get_buffer (text_view), &start, &end,
5943                                               priv->editable))
5944         {
5945           if (leave_one)
5946             gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view),
5947                                                           " ", 1,
5948                                                           priv->editable);
5949         }
5950       else
5951         {
5952           gtk_widget_error_bell (GTK_WIDGET (text_view));
5953         }
5954
5955       gtk_text_buffer_end_user_action (get_buffer (text_view));
5956       gtk_text_view_set_virtual_cursor_pos (text_view, -1, -1);
5957
5958       DV(g_print (G_STRLOC": scrolling onscreen\n"));
5959       gtk_text_view_scroll_mark_onscreen (text_view,
5960                                           gtk_text_buffer_get_insert (get_buffer (text_view)));
5961     }
5962   else
5963     {
5964       gtk_widget_error_bell (GTK_WIDGET (text_view));
5965     }
5966 }
5967
5968 static void
5969 gtk_text_view_backspace (GtkTextView *text_view)
5970 {
5971   GtkTextViewPrivate *priv;
5972   GtkTextIter insert;
5973
5974   priv = text_view->priv;
5975
5976   gtk_text_view_reset_im_context (text_view);
5977
5978   /* Backspace deletes the selection, if one exists */
5979   if (gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
5980                                         priv->editable))
5981     return;
5982
5983   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
5984                                     &insert,
5985                                     gtk_text_buffer_get_insert (get_buffer (text_view)));
5986
5987   if (gtk_text_buffer_backspace (get_buffer (text_view), &insert,
5988                                  TRUE, priv->editable))
5989     {
5990       gtk_text_view_set_virtual_cursor_pos (text_view, -1, -1);
5991       DV(g_print (G_STRLOC": scrolling onscreen\n"));
5992       gtk_text_view_scroll_mark_onscreen (text_view,
5993                                           gtk_text_buffer_get_insert (get_buffer (text_view)));
5994     }
5995   else
5996     {
5997       gtk_widget_error_bell (GTK_WIDGET (text_view));
5998     }
5999 }
6000
6001 static void
6002 gtk_text_view_cut_clipboard (GtkTextView *text_view)
6003 {
6004   GtkClipboard *clipboard = gtk_widget_get_clipboard (GTK_WIDGET (text_view),
6005                                                       GDK_SELECTION_CLIPBOARD);
6006
6007   gtk_text_buffer_cut_clipboard (get_buffer (text_view),
6008                                  clipboard,
6009                                  text_view->priv->editable);
6010   DV(g_print (G_STRLOC": scrolling onscreen\n"));
6011   gtk_text_view_scroll_mark_onscreen (text_view,
6012                                       gtk_text_buffer_get_insert (get_buffer (text_view)));
6013 }
6014
6015 static void
6016 gtk_text_view_copy_clipboard (GtkTextView *text_view)
6017 {
6018   GtkClipboard *clipboard = gtk_widget_get_clipboard (GTK_WIDGET (text_view),
6019                                                       GDK_SELECTION_CLIPBOARD);
6020
6021   gtk_text_buffer_copy_clipboard (get_buffer (text_view),
6022                                   clipboard);
6023
6024   /* on copy do not scroll, we are already onscreen */
6025 }
6026
6027 static void
6028 gtk_text_view_paste_clipboard (GtkTextView *text_view)
6029 {
6030   GtkClipboard *clipboard = gtk_widget_get_clipboard (GTK_WIDGET (text_view),
6031                                                       GDK_SELECTION_CLIPBOARD);
6032
6033   gtk_text_buffer_paste_clipboard (get_buffer (text_view),
6034                                    clipboard,
6035                                    NULL,
6036                                    text_view->priv->editable);
6037 }
6038
6039 static void
6040 gtk_text_view_paste_done_handler (GtkTextBuffer *buffer,
6041                                   GtkClipboard  *clipboard,
6042                                   gpointer       data)
6043 {
6044   GtkTextView *text_view = data;
6045   GtkTextViewPrivate *priv;
6046
6047   priv = text_view->priv;
6048
6049   if (priv->scroll_after_paste)
6050     {
6051       DV(g_print (G_STRLOC": scrolling onscreen\n"));
6052       gtk_text_view_scroll_mark_onscreen (text_view, gtk_text_buffer_get_insert (buffer));
6053     }
6054
6055   priv->scroll_after_paste = TRUE;
6056 }
6057
6058 static void
6059 gtk_text_view_toggle_overwrite (GtkTextView *text_view)
6060 {
6061   GtkTextViewPrivate *priv = text_view->priv;
6062
6063   if (priv->text_window)
6064     text_window_invalidate_cursors (priv->text_window);
6065
6066   priv->overwrite_mode = !priv->overwrite_mode;
6067
6068   if (priv->layout)
6069     gtk_text_layout_set_overwrite_mode (priv->layout,
6070                                         priv->overwrite_mode && priv->editable);
6071
6072   if (priv->text_window)
6073     text_window_invalidate_cursors (priv->text_window);
6074
6075   gtk_text_view_pend_cursor_blink (text_view);
6076
6077   g_object_notify (G_OBJECT (text_view), "overwrite");
6078 }
6079
6080 /**
6081  * gtk_text_view_get_overwrite:
6082  * @text_view: a #GtkTextView
6083  *
6084  * Returns whether the #GtkTextView is in overwrite mode or not.
6085  *
6086  * Return value: whether @text_view is in overwrite mode or not.
6087  *
6088  * Since: 2.4
6089  **/
6090 gboolean
6091 gtk_text_view_get_overwrite (GtkTextView *text_view)
6092 {
6093   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6094
6095   return text_view->priv->overwrite_mode;
6096 }
6097
6098 /**
6099  * gtk_text_view_set_overwrite:
6100  * @text_view: a #GtkTextView
6101  * @overwrite: %TRUE to turn on overwrite mode, %FALSE to turn it off
6102  *
6103  * Changes the #GtkTextView overwrite mode.
6104  *
6105  * Since: 2.4
6106  **/
6107 void
6108 gtk_text_view_set_overwrite (GtkTextView *text_view,
6109                              gboolean     overwrite)
6110 {
6111   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6112   overwrite = overwrite != FALSE;
6113
6114   if (text_view->priv->overwrite_mode != overwrite)
6115     gtk_text_view_toggle_overwrite (text_view);
6116 }
6117
6118 /**
6119  * gtk_text_view_set_accepts_tab:
6120  * @text_view: A #GtkTextView
6121  * @accepts_tab: %TRUE if pressing the Tab key should insert a tab
6122  *    character, %FALSE, if pressing the Tab key should move the
6123  *    keyboard focus.
6124  *
6125  * Sets the behavior of the text widget when the Tab key is pressed.
6126  * If @accepts_tab is %TRUE, a tab character is inserted. If @accepts_tab
6127  * is %FALSE the keyboard focus is moved to the next widget in the focus
6128  * chain.
6129  *
6130  * Since: 2.4
6131  **/
6132 void
6133 gtk_text_view_set_accepts_tab (GtkTextView *text_view,
6134                                gboolean     accepts_tab)
6135 {
6136   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6137
6138   accepts_tab = accepts_tab != FALSE;
6139
6140   if (text_view->priv->accepts_tab != accepts_tab)
6141     {
6142       text_view->priv->accepts_tab = accepts_tab;
6143
6144       g_object_notify (G_OBJECT (text_view), "accepts-tab");
6145     }
6146 }
6147
6148 /**
6149  * gtk_text_view_get_accepts_tab:
6150  * @text_view: A #GtkTextView
6151  *
6152  * Returns whether pressing the Tab key inserts a tab characters.
6153  * gtk_text_view_set_accepts_tab().
6154  *
6155  * Return value: %TRUE if pressing the Tab key inserts a tab character,
6156  *   %FALSE if pressing the Tab key moves the keyboard focus.
6157  *
6158  * Since: 2.4
6159  **/
6160 gboolean
6161 gtk_text_view_get_accepts_tab (GtkTextView *text_view)
6162 {
6163   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6164
6165   return text_view->priv->accepts_tab;
6166 }
6167
6168 static void
6169 gtk_text_view_compat_move_focus (GtkTextView     *text_view,
6170                                  GtkDirectionType direction_type)
6171 {
6172   GSignalInvocationHint *hint = g_signal_get_invocation_hint (text_view);
6173
6174   /*  as of GTK+ 2.12, the "move-focus" signal has been moved to GtkWidget,
6175    *  the evil code below makes sure that both emitting the signal and
6176    *  calling the virtual function directly continue to work as expetcted
6177    */
6178
6179   if (hint->signal_id == g_signal_lookup ("move-focus", GTK_TYPE_WIDGET))
6180     {
6181       /*  if this is a signal emission, chain up  */
6182
6183       gboolean retval;
6184
6185       g_signal_chain_from_overridden_handler (text_view,
6186                                               direction_type, &retval);
6187     }
6188   else
6189     {
6190       /*  otherwise emit the signal, since somebody called the virtual
6191        *  function directly
6192        */
6193
6194       g_signal_emit_by_name (text_view, "move-focus", direction_type);
6195     }
6196 }
6197
6198 /*
6199  * Selections
6200  */
6201
6202 static void
6203 gtk_text_view_unselect (GtkTextView *text_view)
6204 {
6205   GtkTextIter insert;
6206
6207   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
6208                                     gtk_text_buffer_get_insert (get_buffer (text_view)));
6209
6210   gtk_text_buffer_move_mark (get_buffer (text_view),
6211                              gtk_text_buffer_get_selection_bound (get_buffer (text_view)),
6212                              &insert);
6213 }
6214
6215 static void
6216 get_iter_at_pointer (GtkTextView *text_view,
6217                      GdkDevice   *device,
6218                      GtkTextIter *iter,
6219                      gint        *x,
6220                      gint        *y)
6221 {
6222   GtkTextViewPrivate *priv;
6223   gint xcoord, ycoord;
6224   GdkModifierType state;
6225
6226   priv = text_view->priv;
6227
6228   gdk_window_get_device_position (priv->text_window->bin_window,
6229                                   device, &xcoord, &ycoord, &state);
6230
6231   gtk_text_layout_get_iter_at_pixel (priv->layout,
6232                                      iter,
6233                                      xcoord + priv->xoffset,
6234                                      ycoord + priv->yoffset);
6235   if (x)
6236     *x = xcoord;
6237
6238   if (y)
6239     *y = ycoord;
6240 }
6241
6242 static void
6243 move_mark_to_pointer_and_scroll (GtkTextView *text_view,
6244                                  const gchar *mark_name,
6245                                  GdkDevice   *device)
6246 {
6247   GtkTextIter newplace;
6248   GtkTextMark *mark;
6249
6250   get_iter_at_pointer (text_view, device, &newplace, NULL, NULL);
6251
6252   mark = gtk_text_buffer_get_mark (get_buffer (text_view), mark_name);
6253
6254   /* This may invalidate the layout */
6255   DV(g_print (G_STRLOC": move mark\n"));
6256
6257   gtk_text_buffer_move_mark (get_buffer (text_view),
6258                              mark,
6259                              &newplace);
6260
6261   DV(g_print (G_STRLOC": scrolling onscreen\n"));
6262   gtk_text_view_scroll_mark_onscreen (text_view, mark);
6263
6264   DV (g_print ("first validate idle leaving %s is %d\n",
6265                G_STRLOC, text_view->priv->first_validate_idle));
6266 }
6267
6268 static gboolean
6269 selection_scan_timeout (gpointer data)
6270 {
6271   GtkTextView *text_view;
6272
6273   text_view = GTK_TEXT_VIEW (data);
6274
6275   gtk_text_view_scroll_mark_onscreen (text_view,
6276                                       gtk_text_buffer_get_insert (get_buffer (text_view)));
6277
6278   return TRUE; /* remain installed. */
6279 }
6280
6281 #define UPPER_OFFSET_ANCHOR 0.8
6282 #define LOWER_OFFSET_ANCHOR 0.2
6283
6284 static gboolean
6285 check_scroll (gdouble offset, GtkAdjustment *adj)
6286 {
6287   if ((offset > UPPER_OFFSET_ANCHOR &&
6288        adj->value + adj->page_size < adj->upper) ||
6289       (offset < LOWER_OFFSET_ANCHOR &&
6290        adj->value > adj->lower))
6291     return TRUE;
6292
6293   return FALSE;
6294 }
6295
6296 static gint
6297 drag_scan_timeout (gpointer data)
6298 {
6299   GtkTextView *text_view;
6300   GtkTextViewPrivate *priv;
6301   GtkTextIter newplace;
6302   gint x, y, width, height;
6303   gdouble pointer_xoffset, pointer_yoffset;
6304
6305   text_view = GTK_TEXT_VIEW (data);
6306   priv = text_view->priv;
6307
6308   get_iter_at_pointer (text_view, priv->dnd_device, &newplace, &x, &y);
6309   gdk_drawable_get_size (priv->text_window->bin_window, &width, &height);
6310
6311   gtk_text_buffer_move_mark (get_buffer (text_view),
6312                              priv->dnd_mark,
6313                              &newplace);
6314
6315   pointer_xoffset = (gdouble) x / width;
6316   pointer_yoffset = (gdouble) y / height;
6317
6318   if (check_scroll (pointer_xoffset, priv->hadjustment) ||
6319       check_scroll (pointer_yoffset, priv->vadjustment))
6320     {
6321       /* do not make offsets surpass lower nor upper anchors, this makes
6322        * scrolling speed relative to the distance of the pointer to the
6323        * anchors when it moves beyond them.
6324        */
6325       pointer_xoffset = CLAMP (pointer_xoffset, LOWER_OFFSET_ANCHOR, UPPER_OFFSET_ANCHOR);
6326       pointer_yoffset = CLAMP (pointer_yoffset, LOWER_OFFSET_ANCHOR, UPPER_OFFSET_ANCHOR);
6327
6328       gtk_text_view_scroll_to_mark (text_view,
6329                                     priv->dnd_mark,
6330                                     0., TRUE, pointer_xoffset, pointer_yoffset);
6331     }
6332
6333   return TRUE;
6334 }
6335
6336 typedef enum
6337 {
6338   SELECT_CHARACTERS,
6339   SELECT_WORDS,
6340   SELECT_LINES
6341 } SelectionGranularity;
6342
6343 /*
6344  * Move @start and @end to the boundaries of the selection unit (indicated by
6345  * @granularity) which contained @start initially.
6346  * If the selction unit is SELECT_WORDS and @start is not contained in a word
6347  * the selection is extended to all the white spaces between the end of the
6348  * word preceding @start and the start of the one following.
6349  */
6350 static void
6351 extend_selection (GtkTextView *text_view,
6352                   SelectionGranularity granularity,
6353                   GtkTextIter *start,
6354                   GtkTextIter *end)
6355 {
6356   *end = *start;
6357
6358   if (granularity == SELECT_WORDS)
6359     {
6360       if (gtk_text_iter_inside_word (start))
6361         {
6362           if (!gtk_text_iter_starts_word (start))
6363             gtk_text_iter_backward_visible_word_start (start);
6364
6365           if (!gtk_text_iter_ends_word (end))
6366             {
6367               if (!gtk_text_iter_forward_visible_word_end (end))
6368                 gtk_text_iter_forward_to_end (end);
6369             }
6370         }
6371       else
6372         {
6373           GtkTextIter tmp;
6374
6375           tmp = *start;
6376           if (gtk_text_iter_backward_visible_word_start (&tmp))
6377             gtk_text_iter_forward_visible_word_end (&tmp);
6378
6379           if (gtk_text_iter_get_line (&tmp) == gtk_text_iter_get_line (start))
6380             *start = tmp;
6381           else
6382             gtk_text_iter_set_line_offset (start, 0);
6383
6384           tmp = *end;
6385           if (!gtk_text_iter_forward_visible_word_end (&tmp))
6386             gtk_text_iter_forward_to_end (&tmp);
6387
6388           if (gtk_text_iter_ends_word (&tmp))
6389             gtk_text_iter_backward_visible_word_start (&tmp);
6390
6391           if (gtk_text_iter_get_line (&tmp) == gtk_text_iter_get_line (end))
6392             *end = tmp;
6393           else
6394             gtk_text_iter_forward_to_line_end (end);
6395         }
6396     }
6397   else if (granularity == SELECT_LINES)
6398     {
6399       if (gtk_text_view_starts_display_line (text_view, start))
6400         {
6401           /* If on a display line boundary, we assume the user
6402            * clicked off the end of a line and we therefore select
6403            * the line before the boundary.
6404            */
6405           gtk_text_view_backward_display_line_start (text_view, start);
6406         }
6407       else
6408         {
6409           /* start isn't on the start of a line, so we move it to the
6410            * start, and move end to the end unless it's already there.
6411            */
6412           gtk_text_view_backward_display_line_start (text_view, start);
6413
6414           if (!gtk_text_view_starts_display_line (text_view, end))
6415             gtk_text_view_forward_display_line_end (text_view, end);
6416         }
6417     }
6418 }
6419
6420
6421 typedef struct
6422 {
6423   SelectionGranularity granularity;
6424   GtkTextMark *orig_start;
6425   GtkTextMark *orig_end;
6426 } SelectionData;
6427
6428 static void
6429 selection_data_free (SelectionData *data)
6430 {
6431   if (data->orig_start != NULL)
6432     gtk_text_buffer_delete_mark (gtk_text_mark_get_buffer (data->orig_start),
6433                                  data->orig_start);
6434   if (data->orig_end != NULL)
6435     gtk_text_buffer_delete_mark (gtk_text_mark_get_buffer (data->orig_end),
6436                                  data->orig_end);
6437   g_free (data);
6438 }
6439
6440 static gint
6441 selection_motion_event_handler (GtkTextView    *text_view,
6442                                 GdkEventMotion *event,
6443                                 SelectionData  *data)
6444 {
6445   GtkTextViewPrivate *priv;
6446
6447   priv = text_view->priv;
6448   gdk_event_request_motions (event);
6449
6450   if (priv->grab_device != event->device)
6451     return FALSE;
6452
6453   if (data->granularity == SELECT_CHARACTERS)
6454     {
6455       move_mark_to_pointer_and_scroll (text_view, "insert", event->device);
6456     }
6457   else
6458     {
6459       GtkTextIter cursor, start, end;
6460       GtkTextIter orig_start, orig_end;
6461       GtkTextBuffer *buffer;
6462
6463       buffer = get_buffer (text_view);
6464
6465       gtk_text_buffer_get_iter_at_mark (buffer, &orig_start, data->orig_start);
6466       gtk_text_buffer_get_iter_at_mark (buffer, &orig_end, data->orig_end);
6467
6468       get_iter_at_pointer (text_view, event->device, &cursor, NULL, NULL);
6469
6470       start = cursor;
6471       extend_selection (text_view, data->granularity, &start, &end);
6472
6473       /* either the selection extends to the front, or end (or not) */
6474       if (gtk_text_iter_compare (&cursor, &orig_start) < 0)
6475         gtk_text_buffer_select_range (buffer, &start, &orig_end);
6476       else
6477         gtk_text_buffer_select_range (buffer, &end, &orig_start);
6478
6479       gtk_text_view_scroll_mark_onscreen (text_view,
6480                                           gtk_text_buffer_get_insert (buffer));
6481     }
6482
6483   /* If we had to scroll offscreen, insert a timeout to do so
6484    * again. Note that in the timeout, even if the mouse doesn't
6485    * move, due to this scroll xoffset/yoffset will have changed
6486    * and we'll need to scroll again.
6487    */
6488   if (text_view->priv->scroll_timeout != 0) /* reset on every motion event */
6489     g_source_remove (text_view->priv->scroll_timeout);
6490
6491   text_view->priv->scroll_timeout =
6492     gdk_threads_add_timeout (50, selection_scan_timeout, text_view);
6493
6494   return TRUE;
6495 }
6496
6497 static void
6498 gtk_text_view_start_selection_drag (GtkTextView       *text_view,
6499                                     const GtkTextIter *iter,
6500                                     GdkEventButton    *button)
6501 {
6502   GtkTextViewPrivate *priv;
6503   GtkTextIter cursor, ins, bound;
6504   GtkTextIter orig_start, orig_end;
6505   GtkTextBuffer *buffer;
6506   SelectionData *data;
6507
6508   if (text_view->priv->selection_drag_handler != 0)
6509     return;
6510
6511   priv = text_view->priv;
6512   data = g_new0 (SelectionData, 1);
6513
6514   if (button->type == GDK_2BUTTON_PRESS)
6515     data->granularity = SELECT_WORDS;
6516   else if (button->type == GDK_3BUTTON_PRESS)
6517     data->granularity = SELECT_LINES;
6518   else
6519     data->granularity = SELECT_CHARACTERS;
6520
6521   priv->grab_device = button->device;
6522   gtk_device_grab_add (GTK_WIDGET (text_view),
6523                        priv->grab_device,
6524                        TRUE);
6525
6526   buffer = get_buffer (text_view);
6527
6528   cursor = *iter;
6529   ins = cursor;
6530
6531   extend_selection (text_view, data->granularity, &ins, &bound);
6532   orig_start = ins;
6533   orig_end = bound;
6534
6535   if (button->state & GDK_SHIFT_MASK)
6536     {
6537       /* Extend selection */
6538       GtkTextIter old_ins, old_bound;
6539       GtkTextIter old_start, old_end;
6540
6541       gtk_text_buffer_get_iter_at_mark (buffer, &old_ins, gtk_text_buffer_get_insert (buffer));
6542       gtk_text_buffer_get_iter_at_mark (buffer, &old_bound, gtk_text_buffer_get_selection_bound (buffer));
6543       old_start = old_ins;
6544       old_end = old_bound;
6545       gtk_text_iter_order (&old_start, &old_end);
6546
6547       /* move the front cursor, if the mouse is in front of the selection. Should the
6548        * cursor however be inside the selection (this happens on tripple click) then we
6549        * move the side which was last moved (current insert mark) */
6550       if (gtk_text_iter_compare (&cursor, &old_start) <= 0 ||
6551           (gtk_text_iter_compare (&cursor, &old_end) < 0 &&
6552            gtk_text_iter_compare (&old_ins, &old_bound) <= 0))
6553         {
6554           bound = old_end;
6555           orig_start = old_end;
6556           orig_end = old_end;
6557         }
6558       else
6559         {
6560           ins = bound;
6561           bound = old_start;
6562           orig_end = bound;
6563           orig_start = bound;
6564         }
6565     }
6566
6567   gtk_text_buffer_select_range (buffer, &ins, &bound);
6568
6569   gtk_text_iter_order (&orig_start, &orig_end);
6570   data->orig_start = gtk_text_buffer_create_mark (buffer, NULL,
6571                                                   &orig_start, TRUE);
6572   data->orig_end = gtk_text_buffer_create_mark (buffer, NULL,
6573                                                 &orig_end, TRUE);
6574   gtk_text_view_check_cursor_blink (text_view);
6575
6576   text_view->priv->selection_drag_handler = g_signal_connect_data (text_view,
6577                                                                    "motion-notify-event",
6578                                                                    G_CALLBACK (selection_motion_event_handler),
6579                                                                    data,
6580                                                                    (GClosureNotify) selection_data_free, 0);
6581 }
6582
6583 /* returns whether we were really dragging */
6584 static gboolean
6585 gtk_text_view_end_selection_drag (GtkTextView *text_view)
6586 {
6587   GtkTextViewPrivate *priv;
6588
6589   priv = text_view->priv;
6590
6591   if (!priv->grab_device)
6592     return FALSE;
6593
6594   if (priv->selection_drag_handler == 0)
6595     return FALSE;
6596
6597   g_signal_handler_disconnect (text_view, priv->selection_drag_handler);
6598   priv->selection_drag_handler = 0;
6599
6600   if (priv->scroll_timeout != 0)
6601     {
6602       g_source_remove (priv->scroll_timeout);
6603       priv->scroll_timeout = 0;
6604     }
6605
6606   gtk_device_grab_remove (GTK_WIDGET (text_view),
6607                           priv->grab_device);
6608   priv->grab_device = NULL;
6609
6610   return TRUE;
6611 }
6612
6613 /*
6614  * Layout utils
6615  */
6616
6617 static void
6618 gtk_text_view_set_attributes_from_style (GtkTextView        *text_view,
6619                                          GtkTextAttributes  *values,
6620                                          GtkStyle           *style)
6621 {
6622   values->appearance.bg_color = style->base[GTK_STATE_NORMAL];
6623   values->appearance.fg_color = style->text[GTK_STATE_NORMAL];
6624
6625   if (values->font)
6626     pango_font_description_free (values->font);
6627
6628   values->font = pango_font_description_copy (style->font_desc);
6629 }
6630
6631 static void
6632 gtk_text_view_check_keymap_direction (GtkTextView *text_view)
6633 {
6634   GtkTextViewPrivate *priv = text_view->priv;
6635
6636   if (priv->layout)
6637     {
6638       GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
6639       GdkKeymap *keymap = gdk_keymap_get_for_display (gtk_widget_get_display (GTK_WIDGET (text_view)));
6640       GtkTextDirection new_cursor_dir;
6641       GtkTextDirection new_keyboard_dir;
6642       gboolean split_cursor;
6643
6644       g_object_get (settings,
6645                     "gtk-split-cursor", &split_cursor,
6646                     NULL);
6647
6648       if (gdk_keymap_get_direction (keymap) == PANGO_DIRECTION_RTL)
6649         new_keyboard_dir = GTK_TEXT_DIR_RTL;
6650       else
6651         new_keyboard_dir  = GTK_TEXT_DIR_LTR;
6652
6653       if (split_cursor)
6654         new_cursor_dir = GTK_TEXT_DIR_NONE;
6655       else
6656         new_cursor_dir = new_keyboard_dir;
6657
6658       gtk_text_layout_set_cursor_direction (priv->layout, new_cursor_dir);
6659       gtk_text_layout_set_keyboard_direction (priv->layout, new_keyboard_dir);
6660     }
6661 }
6662
6663 static void
6664 gtk_text_view_ensure_layout (GtkTextView *text_view)
6665 {
6666   GtkWidget *widget;
6667   GtkTextViewPrivate *priv;
6668
6669   widget = GTK_WIDGET (text_view);
6670   priv = text_view->priv;
6671
6672   if (priv->layout == NULL)
6673     {
6674       GtkTextAttributes *style;
6675       PangoContext *ltr_context, *rtl_context;
6676       GSList *tmp_list;
6677
6678       DV(g_print(G_STRLOC"\n"));
6679
6680       priv->layout = gtk_text_layout_new ();
6681
6682       g_signal_connect (priv->layout,
6683                         "invalidated",
6684                         G_CALLBACK (invalidated_handler),
6685                         text_view);
6686
6687       g_signal_connect (priv->layout,
6688                         "changed",
6689                         G_CALLBACK (changed_handler),
6690                         text_view);
6691
6692       g_signal_connect (priv->layout,
6693                         "allocate-child",
6694                         G_CALLBACK (gtk_text_view_child_allocated),
6695                         text_view);
6696
6697       if (get_buffer (text_view))
6698         gtk_text_layout_set_buffer (priv->layout, get_buffer (text_view));
6699
6700       if ((gtk_widget_has_focus (widget) && priv->cursor_visible))
6701         gtk_text_view_pend_cursor_blink (text_view);
6702       else
6703         gtk_text_layout_set_cursor_visible (priv->layout, FALSE);
6704
6705       gtk_text_layout_set_overwrite_mode (priv->layout,
6706                                           priv->overwrite_mode && priv->editable);
6707
6708       ltr_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
6709       pango_context_set_base_dir (ltr_context, PANGO_DIRECTION_LTR);
6710       rtl_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
6711       pango_context_set_base_dir (rtl_context, PANGO_DIRECTION_RTL);
6712
6713       gtk_text_layout_set_contexts (priv->layout, ltr_context, rtl_context);
6714
6715       g_object_unref (ltr_context);
6716       g_object_unref (rtl_context);
6717
6718       gtk_text_view_check_keymap_direction (text_view);
6719
6720       style = gtk_text_attributes_new ();
6721
6722       gtk_widget_ensure_style (widget);
6723       gtk_text_view_set_attributes_from_style (text_view,
6724                                                style,
6725                                                gtk_widget_get_style (widget));
6726
6727       style->pixels_above_lines = priv->pixels_above_lines;
6728       style->pixels_below_lines = priv->pixels_below_lines;
6729       style->pixels_inside_wrap = priv->pixels_inside_wrap;
6730       style->left_margin = priv->left_margin;
6731       style->right_margin = priv->right_margin;
6732       style->indent = priv->indent;
6733       style->tabs = priv->tabs ? pango_tab_array_copy (priv->tabs) : NULL;
6734
6735       style->wrap_mode = priv->wrap_mode;
6736       style->justification = priv->justify;
6737       style->direction = gtk_widget_get_direction (GTK_WIDGET (text_view));
6738
6739       gtk_text_layout_set_default_style (priv->layout, style);
6740
6741       gtk_text_attributes_unref (style);
6742
6743       /* Set layout for all anchored children */
6744
6745       tmp_list = priv->children;
6746       while (tmp_list != NULL)
6747         {
6748           GtkTextViewChild *vc = tmp_list->data;
6749
6750           if (vc->anchor)
6751             {
6752               gtk_text_anchored_child_set_layout (vc->widget,
6753                                                   priv->layout);
6754               /* vc may now be invalid! */
6755             }
6756
6757           tmp_list = g_slist_next (tmp_list);
6758         }
6759
6760       gtk_text_view_invalidate (text_view);
6761     }
6762 }
6763
6764 /**
6765  * gtk_text_view_get_default_attributes:
6766  * @text_view: a #GtkTextView
6767  *
6768  * Obtains a copy of the default text attributes. These are the
6769  * attributes used for text unless a tag overrides them.
6770  * You'd typically pass the default attributes in to
6771  * gtk_text_iter_get_attributes() in order to get the
6772  * attributes in effect at a given text position.
6773  *
6774  * The return value is a copy owned by the caller of this function,
6775  * and should be freed.
6776  *
6777  * Return value: a new #GtkTextAttributes
6778  **/
6779 GtkTextAttributes*
6780 gtk_text_view_get_default_attributes (GtkTextView *text_view)
6781 {
6782   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
6783
6784   gtk_text_view_ensure_layout (text_view);
6785
6786   return gtk_text_attributes_copy (text_view->priv->layout->default_style);
6787 }
6788
6789 static void
6790 gtk_text_view_destroy_layout (GtkTextView *text_view)
6791 {
6792   GtkTextViewPrivate *priv = text_view->priv;
6793
6794   if (priv->layout)
6795     {
6796       GSList *tmp_list;
6797
6798       gtk_text_view_remove_validate_idles (text_view);
6799
6800       g_signal_handlers_disconnect_by_func (priv->layout,
6801                                             invalidated_handler,
6802                                             text_view);
6803       g_signal_handlers_disconnect_by_func (priv->layout,
6804                                             changed_handler,
6805                                             text_view);
6806
6807       /* Remove layout from all anchored children */
6808       tmp_list = priv->children;
6809       while (tmp_list != NULL)
6810         {
6811           GtkTextViewChild *vc = tmp_list->data;
6812
6813           if (vc->anchor)
6814             {
6815               gtk_text_anchored_child_set_layout (vc->widget, NULL);
6816               /* vc may now be invalid! */
6817             }
6818
6819           tmp_list = g_slist_next (tmp_list);
6820         }
6821
6822       gtk_text_view_stop_cursor_blink (text_view);
6823       gtk_text_view_end_selection_drag (text_view);
6824
6825       g_object_unref (priv->layout);
6826       priv->layout = NULL;
6827     }
6828 }
6829
6830 /**
6831  * gtk_text_view_reset_im_context:
6832  * @text_view: a #GtkTextView
6833  *
6834  * Reset the input method context of the text view if needed.
6835  *
6836  * This can be necessary in the case where modifying the buffer
6837  * would confuse on-going input method behavior.
6838  *
6839  * Since: 2.22
6840  */
6841 void
6842 gtk_text_view_reset_im_context (GtkTextView *text_view)
6843 {
6844   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6845
6846   if (text_view->priv->need_im_reset)
6847     {
6848       text_view->priv->need_im_reset = FALSE;
6849       gtk_im_context_reset (text_view->priv->im_context);
6850     }
6851 }
6852
6853 /**
6854  * gtk_text_view_im_context_filter_keypress:
6855  * @text_view: a #GtkTextView
6856  * @event: the key event
6857  *
6858  * Allow the #GtkTextView input method to internally handle key press
6859  * and release events. If this function returns %TRUE, then no further
6860  * processing should be done for this key event. See
6861  * gtk_im_context_filter_keypress().
6862  *
6863  * Note that you are expected to call this function from your handler
6864  * when overriding key event handling. This is needed in the case when
6865  * you need to insert your own key handling between the input method
6866  * and the default key event handling of the #GtkTextView.
6867  *
6868  * |[
6869  * static gboolean
6870  * gtk_foo_bar_key_press_event (GtkWidget   *widget,
6871  *                              GdkEventKey *event)
6872  * {
6873  *   if ((key->keyval == GDK_Return || key->keyval == GDK_KP_Enter))
6874  *     {
6875  *       if (gtk_text_view_im_context_filter_keypress (GTK_TEXT_VIEW (view), event))
6876  *         return TRUE;
6877  *     }
6878  *
6879  *     /&ast; Do some stuff &ast;/
6880  *
6881  *   return GTK_WIDGET_CLASS (gtk_foo_bar_parent_class)->key_press_event (widget, event);
6882  * }
6883  * ]|
6884  *
6885  * Return value: %TRUE if the input method handled the key event.
6886  *
6887  * Since: 2.22
6888  */
6889 gboolean
6890 gtk_text_view_im_context_filter_keypress (GtkTextView  *text_view,
6891                                           GdkEventKey  *event)
6892 {
6893   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6894
6895   return gtk_im_context_filter_keypress (text_view->priv->im_context, event);
6896 }
6897
6898 /*
6899  * DND feature
6900  */
6901
6902 static void
6903 drag_begin_cb (GtkWidget      *widget,
6904                GdkDragContext *context,
6905                gpointer        data)
6906 {
6907   GtkTextView     *text_view = GTK_TEXT_VIEW (widget);
6908   GtkTextBuffer   *buffer = gtk_text_view_get_buffer (text_view);
6909   GtkTextIter      start;
6910   GtkTextIter      end;
6911   cairo_surface_t *surface = NULL;
6912
6913   g_signal_handlers_disconnect_by_func (widget, drag_begin_cb, NULL);
6914
6915   if (gtk_text_buffer_get_selection_bounds (buffer, &start, &end))
6916     surface = _gtk_text_util_create_rich_drag_icon (widget, buffer, &start, &end);
6917
6918   if (surface)
6919     {
6920       gtk_drag_set_icon_surface (context, surface);
6921       cairo_surface_destroy (surface);
6922     }
6923   else
6924     {
6925       gtk_drag_set_icon_default (context);
6926     }
6927 }
6928
6929 static void
6930 gtk_text_view_start_selection_dnd (GtkTextView       *text_view,
6931                                    const GtkTextIter *iter,
6932                                    GdkEventMotion    *event)
6933 {
6934   GtkTargetList *target_list;
6935
6936   text_view->priv->drag_start_x = -1;
6937   text_view->priv->drag_start_y = -1;
6938   text_view->priv->pending_place_cursor_button = 0;
6939
6940   target_list = gtk_text_buffer_get_copy_target_list (get_buffer (text_view));
6941
6942   g_signal_connect (text_view, "drag-begin",
6943                     G_CALLBACK (drag_begin_cb), NULL);
6944   gtk_drag_begin (GTK_WIDGET (text_view), target_list,
6945                   GDK_ACTION_COPY | GDK_ACTION_MOVE,
6946                   1, (GdkEvent*)event);
6947 }
6948
6949 static void
6950 gtk_text_view_drag_begin (GtkWidget        *widget,
6951                           GdkDragContext   *context)
6952 {
6953   /* do nothing */
6954 }
6955
6956 static void
6957 gtk_text_view_drag_end (GtkWidget        *widget,
6958                         GdkDragContext   *context)
6959 {
6960 }
6961
6962 static void
6963 gtk_text_view_drag_data_get (GtkWidget        *widget,
6964                              GdkDragContext   *context,
6965                              GtkSelectionData *selection_data,
6966                              guint             info,
6967                              guint             time)
6968 {
6969   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
6970   GtkTextBuffer *buffer = gtk_text_view_get_buffer (text_view);
6971
6972   if (info == GTK_TEXT_BUFFER_TARGET_INFO_BUFFER_CONTENTS)
6973     {
6974       gtk_selection_data_set (selection_data,
6975                               gdk_atom_intern_static_string ("GTK_TEXT_BUFFER_CONTENTS"),
6976                               8, /* bytes */
6977                               (void*)&buffer,
6978                               sizeof (buffer));
6979     }
6980   else if (info == GTK_TEXT_BUFFER_TARGET_INFO_RICH_TEXT)
6981     {
6982       GtkTextIter start;
6983       GtkTextIter end;
6984       guint8 *str = NULL;
6985       gsize len;
6986
6987       if (gtk_text_buffer_get_selection_bounds (buffer, &start, &end))
6988         {
6989           /* Extract the selected text */
6990           str = gtk_text_buffer_serialize (buffer, buffer,
6991                                            selection_data->target,
6992                                            &start, &end,
6993                                            &len);
6994         }
6995
6996       if (str)
6997         {
6998           gtk_selection_data_set (selection_data,
6999                                   selection_data->target,
7000                                   8, /* bytes */
7001                                   (guchar *) str, len);
7002           g_free (str);
7003         }
7004     }
7005   else
7006     {
7007       GtkTextIter start;
7008       GtkTextIter end;
7009       gchar *str = NULL;
7010
7011       if (gtk_text_buffer_get_selection_bounds (buffer, &start, &end))
7012         {
7013           /* Extract the selected text */
7014           str = gtk_text_iter_get_visible_text (&start, &end);
7015         }
7016
7017       if (str)
7018         {
7019           gtk_selection_data_set_text (selection_data, str, -1);
7020           g_free (str);
7021         }
7022     }
7023 }
7024
7025 static void
7026 gtk_text_view_drag_data_delete (GtkWidget        *widget,
7027                                 GdkDragContext   *context)
7028 {
7029   gtk_text_buffer_delete_selection (GTK_TEXT_VIEW (widget)->priv->buffer,
7030                                     TRUE, GTK_TEXT_VIEW (widget)->priv->editable);
7031 }
7032
7033 static void
7034 gtk_text_view_drag_leave (GtkWidget        *widget,
7035                           GdkDragContext   *context,
7036                           guint             time)
7037 {
7038   GtkTextView *text_view;
7039   GtkTextViewPrivate *priv;
7040
7041   text_view = GTK_TEXT_VIEW (widget);
7042   priv = text_view->priv;
7043
7044   gtk_text_mark_set_visible (priv->dnd_mark, FALSE);
7045
7046   if (priv->dnd_device)
7047     priv->dnd_device = NULL;
7048
7049   if (priv->scroll_timeout != 0)
7050     g_source_remove (priv->scroll_timeout);
7051
7052   priv->scroll_timeout = 0;
7053 }
7054
7055 static gboolean
7056 gtk_text_view_drag_motion (GtkWidget        *widget,
7057                            GdkDragContext   *context,
7058                            gint              x,
7059                            gint              y,
7060                            guint             time)
7061 {
7062   GtkTextIter newplace;
7063   GtkTextView *text_view;
7064   GtkTextViewPrivate *priv;
7065   GtkTextIter start;
7066   GtkTextIter end;
7067   GdkRectangle target_rect;
7068   gint bx, by;
7069   GdkAtom target;
7070   GdkDragAction suggested_action = 0;
7071
7072   text_view = GTK_TEXT_VIEW (widget);
7073   priv = text_view->priv;
7074
7075   target_rect = priv->text_window->allocation;
7076
7077   if (x < target_rect.x ||
7078       y < target_rect.y ||
7079       x > (target_rect.x + target_rect.width) ||
7080       y > (target_rect.y + target_rect.height))
7081     return FALSE; /* outside the text window, allow parent widgets to handle event */
7082
7083   gtk_text_view_window_to_buffer_coords (text_view,
7084                                          GTK_TEXT_WINDOW_WIDGET,
7085                                          x, y,
7086                                          &bx, &by);
7087
7088   gtk_text_layout_get_iter_at_pixel (priv->layout,
7089                                      &newplace,
7090                                      bx, by);
7091
7092   target = gtk_drag_dest_find_target (widget, context,
7093                                       gtk_drag_dest_get_target_list (widget));
7094
7095   if (target == GDK_NONE)
7096     {
7097       /* can't accept any of the offered targets */
7098     }
7099   else if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
7100                                                  &start, &end) &&
7101            gtk_text_iter_compare (&newplace, &start) >= 0 &&
7102            gtk_text_iter_compare (&newplace, &end) <= 0)
7103     {
7104       /* We're inside the selection. */
7105     }
7106   else
7107     {
7108       if (gtk_text_iter_can_insert (&newplace, priv->editable))
7109         {
7110           GtkWidget *source_widget;
7111
7112           suggested_action = context->suggested_action;
7113
7114           source_widget = gtk_drag_get_source_widget (context);
7115
7116           if (source_widget == widget)
7117             {
7118               /* Default to MOVE, unless the user has
7119                * pressed ctrl or alt to affect available actions
7120                */
7121               if ((context->actions & GDK_ACTION_MOVE) != 0)
7122                 suggested_action = GDK_ACTION_MOVE;
7123             }
7124         }
7125       else
7126         {
7127           /* Can't drop here. */
7128         }
7129     }
7130
7131   if (suggested_action != 0)
7132     {
7133       gtk_text_mark_set_visible (priv->dnd_mark,
7134                                  priv->cursor_visible);
7135
7136       gdk_drag_status (context, suggested_action, time);
7137     }
7138   else
7139     {
7140       gdk_drag_status (context, 0, time);
7141       gtk_text_mark_set_visible (priv->dnd_mark, FALSE);
7142     }
7143
7144   priv->dnd_device = gdk_drag_context_get_device (context);
7145
7146   if (!priv->scroll_timeout)
7147     priv->scroll_timeout =
7148       gdk_threads_add_timeout (100, drag_scan_timeout, text_view);
7149
7150   /* TRUE return means don't propagate the drag motion to parent
7151    * widgets that may also be drop sites.
7152    */
7153   return TRUE;
7154 }
7155
7156 static gboolean
7157 gtk_text_view_drag_drop (GtkWidget        *widget,
7158                          GdkDragContext   *context,
7159                          gint              x,
7160                          gint              y,
7161                          guint             time)
7162 {
7163   GtkTextView *text_view;
7164   GtkTextViewPrivate *priv;
7165   GtkTextIter drop_point;
7166   GdkAtom target = GDK_NONE;
7167
7168   text_view = GTK_TEXT_VIEW (widget);
7169   priv = text_view->priv;
7170
7171   if (priv->scroll_timeout != 0)
7172     g_source_remove (priv->scroll_timeout);
7173
7174   priv->scroll_timeout = 0;
7175
7176   gtk_text_mark_set_visible (priv->dnd_mark, FALSE);
7177
7178   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
7179                                     &drop_point,
7180                                     priv->dnd_mark);
7181
7182   if (gtk_text_iter_can_insert (&drop_point, priv->editable))
7183     target = gtk_drag_dest_find_target (widget, context, NULL);
7184
7185   if (target != GDK_NONE)
7186     gtk_drag_get_data (widget, context, target, time);
7187   else
7188     gtk_drag_finish (context, FALSE, FALSE, time);
7189
7190   return TRUE;
7191 }
7192
7193 static void
7194 insert_text_data (GtkTextView      *text_view,
7195                   GtkTextIter      *drop_point,
7196                   GtkSelectionData *selection_data)
7197 {
7198   guchar *str;
7199
7200   str = gtk_selection_data_get_text (selection_data);
7201
7202   if (str)
7203     {
7204       if (!gtk_text_buffer_insert_interactive (get_buffer (text_view),
7205                                                drop_point, (gchar *) str, -1,
7206                                                text_view->priv->editable))
7207         {
7208           gtk_widget_error_bell (GTK_WIDGET (text_view));
7209         }
7210
7211       g_free (str);
7212     }
7213 }
7214
7215 static void
7216 gtk_text_view_drag_data_received (GtkWidget        *widget,
7217                                   GdkDragContext   *context,
7218                                   gint              x,
7219                                   gint              y,
7220                                   GtkSelectionData *selection_data,
7221                                   guint             info,
7222                                   guint             time)
7223 {
7224   GtkTextIter drop_point;
7225   GtkTextView *text_view;
7226   GtkTextViewPrivate *priv;
7227   gboolean success = FALSE;
7228   GtkTextBuffer *buffer = NULL;
7229
7230   text_view = GTK_TEXT_VIEW (widget);
7231   priv = text_view->priv;
7232
7233   if (!priv->dnd_mark)
7234     goto done;
7235
7236   buffer = get_buffer (text_view);
7237
7238   gtk_text_buffer_get_iter_at_mark (buffer,
7239                                     &drop_point,
7240                                     priv->dnd_mark);
7241
7242   if (!gtk_text_iter_can_insert (&drop_point, priv->editable))
7243     goto done;
7244
7245   success = TRUE;
7246
7247   gtk_text_buffer_begin_user_action (buffer);
7248
7249   if (info == GTK_TEXT_BUFFER_TARGET_INFO_BUFFER_CONTENTS)
7250     {
7251       GtkTextBuffer *src_buffer = NULL;
7252       GtkTextIter start, end;
7253       gboolean copy_tags = TRUE;
7254
7255       if (selection_data->length != sizeof (src_buffer))
7256         return;
7257
7258       memcpy (&src_buffer, selection_data->data, sizeof (src_buffer));
7259
7260       if (src_buffer == NULL)
7261         return;
7262
7263       g_return_if_fail (GTK_IS_TEXT_BUFFER (src_buffer));
7264
7265       if (gtk_text_buffer_get_tag_table (src_buffer) !=
7266           gtk_text_buffer_get_tag_table (buffer))
7267         {
7268           /*  try to find a suitable rich text target instead  */
7269           GdkAtom *atoms;
7270           gint     n_atoms;
7271           GList   *list;
7272           GdkAtom  target = GDK_NONE;
7273
7274           copy_tags = FALSE;
7275
7276           atoms = gtk_text_buffer_get_deserialize_formats (buffer, &n_atoms);
7277
7278           for (list = context->targets; list; list = g_list_next (list))
7279             {
7280               gint i;
7281
7282               for (i = 0; i < n_atoms; i++)
7283                 if (GUINT_TO_POINTER (atoms[i]) == list->data)
7284                   {
7285                     target = atoms[i];
7286                     break;
7287                   }
7288             }
7289
7290           g_free (atoms);
7291
7292           if (target != GDK_NONE)
7293             {
7294               gtk_drag_get_data (widget, context, target, time);
7295               gtk_text_buffer_end_user_action (buffer);
7296               return;
7297             }
7298         }
7299
7300       if (gtk_text_buffer_get_selection_bounds (src_buffer,
7301                                                 &start,
7302                                                 &end))
7303         {
7304           if (copy_tags)
7305             gtk_text_buffer_insert_range_interactive (buffer,
7306                                                       &drop_point,
7307                                                       &start,
7308                                                       &end,
7309                                                       priv->editable);
7310           else
7311             {
7312               gchar *str;
7313
7314               str = gtk_text_iter_get_visible_text (&start, &end);
7315               gtk_text_buffer_insert_interactive (buffer,
7316                                                   &drop_point, str, -1,
7317                                                   priv->editable);
7318               g_free (str);
7319             }
7320         }
7321     }
7322   else if (selection_data->length > 0 &&
7323            info == GTK_TEXT_BUFFER_TARGET_INFO_RICH_TEXT)
7324     {
7325       gboolean retval;
7326       GError *error = NULL;
7327
7328       retval = gtk_text_buffer_deserialize (buffer, buffer,
7329                                             selection_data->target,
7330                                             &drop_point,
7331                                             (guint8 *) selection_data->data,
7332                                             selection_data->length,
7333                                             &error);
7334
7335       if (!retval)
7336         {
7337           g_warning ("error pasting: %s\n", error->message);
7338           g_clear_error (&error);
7339         }
7340     }
7341   else
7342     insert_text_data (text_view, &drop_point, selection_data);
7343
7344  done:
7345   gtk_drag_finish (context, success,
7346                    success && context->action == GDK_ACTION_MOVE,
7347                    time);
7348
7349   if (success)
7350     {
7351       gtk_text_buffer_get_iter_at_mark (buffer,
7352                                         &drop_point,
7353                                         priv->dnd_mark);
7354       gtk_text_buffer_place_cursor (buffer, &drop_point);
7355
7356       gtk_text_buffer_end_user_action (buffer);
7357     }
7358 }
7359
7360 /**
7361  * gtk_text_view_get_hadjustment:
7362  * @text_view: a #GtkTextView
7363  *
7364  * Gets the horizontal-scrolling #GtkAdjustment.
7365  *
7366  * Returns: (transfer none): pointer to the horizontal #GtkAdjustment
7367  *
7368  * Since: 2.22
7369  **/
7370 GtkAdjustment*
7371 gtk_text_view_get_hadjustment (GtkTextView *text_view)
7372 {
7373   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
7374
7375   return get_hadjustment (text_view);
7376 }
7377
7378 /**
7379  * gtk_text_view_get_vadjustment:
7380  * @text_view: a #GtkTextView
7381  *
7382  * Gets the vertical-scrolling #GtkAdjustment.
7383  *
7384  * Returns: (transfer none): pointer to the vertical #GtkAdjustment
7385  *
7386  * Since: 2.22
7387  **/
7388 GtkAdjustment*
7389 gtk_text_view_get_vadjustment (GtkTextView *text_view)
7390 {
7391   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
7392
7393   return get_vadjustment (text_view);
7394 }
7395
7396 static GtkAdjustment*
7397 get_hadjustment (GtkTextView *text_view)
7398 {
7399   if (text_view->priv->hadjustment == NULL)
7400     gtk_text_view_set_scroll_adjustments (text_view,
7401                                           NULL, /* forces creation */
7402                                           text_view->priv->vadjustment);
7403
7404   return text_view->priv->hadjustment;
7405 }
7406
7407 static GtkAdjustment*
7408 get_vadjustment (GtkTextView *text_view)
7409 {
7410   if (text_view->priv->vadjustment == NULL)
7411     gtk_text_view_set_scroll_adjustments (text_view,
7412                                           text_view->priv->hadjustment,
7413                                           NULL); /* forces creation */
7414   return text_view->priv->vadjustment;
7415 }
7416
7417
7418 static void
7419 gtk_text_view_set_scroll_adjustments (GtkTextView   *text_view,
7420                                       GtkAdjustment *hadj,
7421                                       GtkAdjustment *vadj)
7422 {
7423   GtkTextViewPrivate *priv = text_view->priv;
7424   gboolean need_adjust = FALSE;
7425
7426   if (hadj)
7427     g_return_if_fail (GTK_IS_ADJUSTMENT (hadj));
7428   else
7429     hadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
7430   if (vadj)
7431     g_return_if_fail (GTK_IS_ADJUSTMENT (vadj));
7432   else
7433     vadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
7434
7435   if (priv->hadjustment && (priv->hadjustment != hadj))
7436     {
7437       g_signal_handlers_disconnect_by_func (priv->hadjustment,
7438                                             gtk_text_view_value_changed,
7439                                             text_view);
7440       g_object_unref (priv->hadjustment);
7441     }
7442
7443   if (priv->vadjustment && (priv->vadjustment != vadj))
7444     {
7445       g_signal_handlers_disconnect_by_func (priv->vadjustment,
7446                                             gtk_text_view_value_changed,
7447                                             text_view);
7448       g_object_unref (priv->vadjustment);
7449     }
7450
7451   if (priv->hadjustment != hadj)
7452     {
7453       priv->hadjustment = hadj;
7454       g_object_ref_sink (priv->hadjustment);
7455
7456       g_signal_connect (priv->hadjustment, "value-changed",
7457                         G_CALLBACK (gtk_text_view_value_changed),
7458                         text_view);
7459       need_adjust = TRUE;
7460     }
7461
7462   if (priv->vadjustment != vadj)
7463     {
7464       priv->vadjustment = vadj;
7465       g_object_ref_sink (priv->vadjustment);
7466
7467       g_signal_connect (priv->vadjustment, "value-changed",
7468                         G_CALLBACK (gtk_text_view_value_changed),
7469                         text_view);
7470       need_adjust = TRUE;
7471     }
7472
7473   if (need_adjust)
7474     gtk_text_view_value_changed (NULL, text_view);
7475 }
7476
7477 /* FIXME this adjust_allocation is a big cut-and-paste from
7478  * GtkCList, needs to be some "official" way to do this
7479  * factored out.
7480  */
7481 typedef struct
7482 {
7483   GdkWindow *window;
7484   int dx;
7485   int dy;
7486 } ScrollData;
7487
7488 /* The window to which widget->window is relative */
7489 #define ALLOCATION_WINDOW(widget)               \
7490    (!gtk_widget_get_has_window (widget) ?                   \
7491     gtk_widget_get_window (widget) :                        \
7492     gdk_window_get_parent (gtk_widget_get_window (widget)))
7493
7494 static void
7495 adjust_allocation_recurse (GtkWidget *widget,
7496                            gpointer   data)
7497 {
7498   GtkAllocation allocation;
7499   ScrollData *scroll_data = data;
7500
7501   /* Need to really size allocate instead of just poking
7502    * into widget->allocation if the widget is not realized.
7503    * FIXME someone figure out why this was.
7504    */
7505   if (!gtk_widget_get_realized (widget))
7506     {
7507       if (gtk_widget_get_visible (widget))
7508         {
7509           GdkRectangle tmp_rectangle;
7510
7511           tmp_rectangle = allocation;
7512           tmp_rectangle.x += scroll_data->dx;
7513           tmp_rectangle.y += scroll_data->dy;
7514
7515           gtk_widget_size_allocate (widget, &tmp_rectangle);
7516         }
7517     }
7518   else
7519     {
7520       if (ALLOCATION_WINDOW (widget) == scroll_data->window)
7521         {
7522           allocation.x += scroll_data->dx;
7523           allocation.y += scroll_data->dy;
7524           gtk_widget_set_allocation (widget, &allocation);
7525
7526           if (GTK_IS_CONTAINER (widget))
7527             gtk_container_forall (GTK_CONTAINER (widget),
7528                                   adjust_allocation_recurse,
7529                                   data);
7530         }
7531     }
7532 }
7533
7534 static void
7535 adjust_allocation (GtkWidget *widget,
7536                    int        dx,
7537                    int        dy)
7538 {
7539   ScrollData scroll_data;
7540
7541   if (gtk_widget_get_realized (widget))
7542     scroll_data.window = ALLOCATION_WINDOW (widget);
7543   else
7544     scroll_data.window = NULL;
7545
7546   scroll_data.dx = dx;
7547   scroll_data.dy = dy;
7548
7549   adjust_allocation_recurse (widget, &scroll_data);
7550 }
7551
7552 static void
7553 gtk_text_view_value_changed (GtkAdjustment *adj,
7554                              GtkTextView   *text_view)
7555 {
7556   GtkTextViewPrivate *priv;
7557   GtkTextIter iter;
7558   gint line_top;
7559   gint dx = 0;
7560   gint dy = 0;
7561
7562   priv = text_view->priv;
7563
7564   /* Note that we oddly call this function with adj == NULL
7565    * sometimes
7566    */
7567
7568   priv->onscreen_validated = FALSE;
7569
7570   DV(g_print(">Scroll offset changed %s/%g, onscreen_validated = FALSE ("G_STRLOC")\n",
7571              adj == priv->hadjustment ? "hadj" : adj == priv->vadjustment ? "vadj" : "none",
7572              adj ? adj->value : 0.0));
7573
7574   if (adj == priv->hadjustment)
7575     {
7576       dx = priv->xoffset - (gint)adj->value;
7577       priv->xoffset = adj->value;
7578
7579       /* If the change is due to a size change we need
7580        * to invalidate the entire text window because there might be
7581        * right-aligned or centered text
7582        */
7583       if (priv->width_changed)
7584         {
7585           if (gtk_widget_get_realized (GTK_WIDGET (text_view)))
7586             gdk_window_invalidate_rect (priv->text_window->bin_window, NULL, FALSE);
7587
7588           priv->width_changed = FALSE;
7589         }
7590     }
7591   else if (adj == priv->vadjustment)
7592     {
7593       dy = priv->yoffset - (gint)adj->value;
7594       priv->yoffset = adj->value;
7595
7596       if (priv->layout)
7597         {
7598           gtk_text_layout_get_line_at_y (priv->layout, &iter, adj->value, &line_top);
7599
7600           gtk_text_buffer_move_mark (get_buffer (text_view), priv->first_para_mark, &iter);
7601
7602           priv->first_para_pixels = adj->value - line_top;
7603         }
7604     }
7605
7606   if (dx != 0 || dy != 0)
7607     {
7608       GSList *tmp_list;
7609
7610       if (gtk_widget_get_realized (GTK_WIDGET (text_view)))
7611         {
7612           if (dy != 0)
7613             {
7614               if (priv->left_window)
7615                 text_window_scroll (priv->left_window, 0, dy);
7616               if (priv->right_window)
7617                 text_window_scroll (priv->right_window, 0, dy);
7618             }
7619
7620           if (dx != 0)
7621             {
7622               if (priv->top_window)
7623                 text_window_scroll (priv->top_window, dx, 0);
7624               if (priv->bottom_window)
7625                 text_window_scroll (priv->bottom_window, dx, 0);
7626             }
7627
7628           /* It looks nicer to scroll the main area last, because
7629            * it takes a while, and making the side areas update
7630            * afterward emphasizes the slowness of scrolling the
7631            * main area.
7632            */
7633           text_window_scroll (priv->text_window, dx, dy);
7634         }
7635
7636       /* Children are now "moved" in the text window, poke
7637        * into widget->allocation for each child
7638        */
7639       tmp_list = priv->children;
7640       while (tmp_list != NULL)
7641         {
7642           GtkTextViewChild *child = tmp_list->data;
7643
7644           if (child->anchor)
7645             adjust_allocation (child->widget, dx, dy);
7646
7647           tmp_list = g_slist_next (tmp_list);
7648         }
7649     }
7650
7651   /* This could result in invalidation, which would install the
7652    * first_validate_idle, which would validate onscreen;
7653    * but we're going to go ahead and validate here, so
7654    * first_validate_idle shouldn't have anything to do.
7655    */
7656   gtk_text_view_update_layout_width (text_view);
7657
7658   /* We also update the IM spot location here, since the IM context
7659    * might do something that leads to validation.
7660    */
7661   gtk_text_view_update_im_spot_location (text_view);
7662
7663   /* note that validation of onscreen could invoke this function
7664    * recursively, by scrolling to maintain first_para, or in response
7665    * to updating the layout width, however there is no problem with
7666    * that, or shouldn't be.
7667    */
7668   gtk_text_view_validate_onscreen (text_view);
7669
7670   /* process exposes */
7671   if (gtk_widget_get_realized (GTK_WIDGET (text_view)))
7672     {
7673       DV (g_print ("Processing updates (%s)\n", G_STRLOC));
7674
7675       if (priv->left_window)
7676         gdk_window_process_updates (priv->left_window->bin_window, TRUE);
7677
7678       if (priv->right_window)
7679         gdk_window_process_updates (priv->right_window->bin_window, TRUE);
7680
7681       if (priv->top_window)
7682         gdk_window_process_updates (priv->top_window->bin_window, TRUE);
7683
7684       if (priv->bottom_window)
7685         gdk_window_process_updates (priv->bottom_window->bin_window, TRUE);
7686
7687       gdk_window_process_updates (priv->text_window->bin_window, TRUE);
7688     }
7689
7690   /* If this got installed, get rid of it, it's just a waste of time. */
7691   if (priv->first_validate_idle != 0)
7692     {
7693       g_source_remove (priv->first_validate_idle);
7694       priv->first_validate_idle = 0;
7695     }
7696
7697   /* Finally we update the IM cursor location again, to ensure any
7698    * changes made by the validation are pushed through.
7699    */
7700   gtk_text_view_update_im_spot_location (text_view);
7701
7702   DV(g_print(">End scroll offset changed handler ("G_STRLOC")\n"));
7703 }
7704
7705 static void
7706 gtk_text_view_commit_handler (GtkIMContext  *context,
7707                               const gchar   *str,
7708                               GtkTextView   *text_view)
7709 {
7710   gtk_text_view_commit_text (text_view, str);
7711 }
7712
7713 static void
7714 gtk_text_view_commit_text (GtkTextView   *text_view,
7715                            const gchar   *str)
7716 {
7717   GtkTextViewPrivate *priv;
7718   gboolean had_selection;
7719
7720   priv = text_view->priv;
7721
7722   gtk_text_buffer_begin_user_action (get_buffer (text_view));
7723
7724   had_selection = gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
7725                                                         NULL, NULL);
7726
7727   gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
7728                                     priv->editable);
7729
7730   if (!strcmp (str, "\n"))
7731     {
7732       if (!gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\n", 1,
7733                                                          priv->editable))
7734         {
7735           gtk_widget_error_bell (GTK_WIDGET (text_view));
7736         }
7737     }
7738   else
7739     {
7740       if (!had_selection && priv->overwrite_mode)
7741         {
7742           GtkTextIter insert;
7743
7744           gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
7745                                             &insert,
7746                                             gtk_text_buffer_get_insert (get_buffer (text_view)));
7747           if (!gtk_text_iter_ends_line (&insert))
7748             gtk_text_view_delete_from_cursor (text_view, GTK_DELETE_CHARS, 1);
7749         }
7750
7751       if (!gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
7752                                                          priv->editable))
7753         {
7754           gtk_widget_error_bell (GTK_WIDGET (text_view));
7755         }
7756     }
7757
7758   gtk_text_buffer_end_user_action (get_buffer (text_view));
7759
7760   gtk_text_view_set_virtual_cursor_pos (text_view, -1, -1);
7761   DV(g_print (G_STRLOC": scrolling onscreen\n"));
7762   gtk_text_view_scroll_mark_onscreen (text_view,
7763                                       gtk_text_buffer_get_insert (get_buffer (text_view)));
7764 }
7765
7766 static void
7767 gtk_text_view_preedit_changed_handler (GtkIMContext *context,
7768                                        GtkTextView  *text_view)
7769 {
7770   GtkTextViewPrivate *priv;
7771   gchar *str;
7772   PangoAttrList *attrs;
7773   gint cursor_pos;
7774   GtkTextIter iter;
7775
7776   priv = text_view->priv;
7777
7778   gtk_text_buffer_get_iter_at_mark (priv->buffer, &iter,
7779                                     gtk_text_buffer_get_insert (priv->buffer));
7780
7781   /* Keypress events are passed to input method even if cursor position is
7782    * not editable; so beep here if it's multi-key input sequence, input
7783    * method will be reset in key-press-event handler.
7784    */
7785   gtk_im_context_get_preedit_string (context, &str, &attrs, &cursor_pos);
7786
7787   if (str && str[0] && !gtk_text_iter_can_insert (&iter, priv->editable))
7788     {
7789       gtk_widget_error_bell (GTK_WIDGET (text_view));
7790       goto out;
7791     }
7792
7793   g_signal_emit (text_view, signals[PREEDIT_CHANGED], 0, str);
7794
7795   if (priv->layout)
7796     gtk_text_layout_set_preedit_string (priv->layout, str, attrs, cursor_pos);
7797   if (gtk_widget_has_focus (GTK_WIDGET (text_view)))
7798     gtk_text_view_scroll_mark_onscreen (text_view,
7799                                         gtk_text_buffer_get_insert (get_buffer (text_view)));
7800
7801 out:
7802   pango_attr_list_unref (attrs);
7803   g_free (str);
7804 }
7805
7806 static gboolean
7807 gtk_text_view_retrieve_surrounding_handler (GtkIMContext  *context,
7808                                             GtkTextView   *text_view)
7809 {
7810   GtkTextIter start;
7811   GtkTextIter end;
7812   gint pos;
7813   gchar *text;
7814
7815   gtk_text_buffer_get_iter_at_mark (text_view->priv->buffer, &start,
7816                                     gtk_text_buffer_get_insert (text_view->priv->buffer));
7817   end = start;
7818
7819   pos = gtk_text_iter_get_line_index (&start);
7820   gtk_text_iter_set_line_offset (&start, 0);
7821   gtk_text_iter_forward_to_line_end (&end);
7822
7823   text = gtk_text_iter_get_slice (&start, &end);
7824   gtk_im_context_set_surrounding (context, text, -1, pos);
7825   g_free (text);
7826
7827   return TRUE;
7828 }
7829
7830 static gboolean
7831 gtk_text_view_delete_surrounding_handler (GtkIMContext  *context,
7832                                           gint           offset,
7833                                           gint           n_chars,
7834                                           GtkTextView   *text_view)
7835 {
7836   GtkTextViewPrivate *priv;
7837   GtkTextIter start;
7838   GtkTextIter end;
7839
7840   priv = text_view->priv;
7841
7842   gtk_text_buffer_get_iter_at_mark (priv->buffer, &start,
7843                                     gtk_text_buffer_get_insert (priv->buffer));
7844   end = start;
7845
7846   gtk_text_iter_forward_chars (&start, offset);
7847   gtk_text_iter_forward_chars (&end, offset + n_chars);
7848
7849   gtk_text_buffer_delete_interactive (priv->buffer, &start, &end,
7850                                       priv->editable);
7851
7852   return TRUE;
7853 }
7854
7855 static void
7856 gtk_text_view_mark_set_handler (GtkTextBuffer     *buffer,
7857                                 const GtkTextIter *location,
7858                                 GtkTextMark       *mark,
7859                                 gpointer           data)
7860 {
7861   GtkTextView *text_view = GTK_TEXT_VIEW (data);
7862   gboolean need_reset = FALSE;
7863
7864   if (mark == gtk_text_buffer_get_insert (buffer))
7865     {
7866       text_view->priv->virtual_cursor_x = -1;
7867       text_view->priv->virtual_cursor_y = -1;
7868       gtk_text_view_update_im_spot_location (text_view);
7869       need_reset = TRUE;
7870     }
7871   else if (mark == gtk_text_buffer_get_selection_bound (buffer))
7872     {
7873       need_reset = TRUE;
7874     }
7875
7876   if (need_reset)
7877     gtk_text_view_reset_im_context (text_view);
7878 }
7879
7880 static void
7881 gtk_text_view_target_list_notify (GtkTextBuffer    *buffer,
7882                                   const GParamSpec *pspec,
7883                                   gpointer          data)
7884 {
7885   GtkWidget     *widget = GTK_WIDGET (data);
7886   GtkTargetList *view_list;
7887   GtkTargetList *buffer_list;
7888   GList         *list;
7889
7890   view_list = gtk_drag_dest_get_target_list (widget);
7891   buffer_list = gtk_text_buffer_get_paste_target_list (buffer);
7892
7893   if (view_list)
7894     gtk_target_list_ref (view_list);
7895   else
7896     view_list = gtk_target_list_new (NULL, 0);
7897
7898   list = view_list->list;
7899   while (list)
7900     {
7901       GtkTargetPair *pair = list->data;
7902
7903       list = g_list_next (list); /* get next element before removing */
7904
7905       if (pair->info >= GTK_TEXT_BUFFER_TARGET_INFO_TEXT &&
7906           pair->info <= GTK_TEXT_BUFFER_TARGET_INFO_BUFFER_CONTENTS)
7907         {
7908           gtk_target_list_remove (view_list, pair->target);
7909         }
7910     }
7911
7912   for (list = buffer_list->list; list; list = g_list_next (list))
7913     {
7914       GtkTargetPair *pair = list->data;
7915
7916       gtk_target_list_add (view_list, pair->target, pair->flags, pair->info);
7917     }
7918
7919   gtk_drag_dest_set_target_list (widget, view_list);
7920   gtk_target_list_unref (view_list);
7921 }
7922
7923 static void
7924 gtk_text_view_get_cursor_location  (GtkTextView   *text_view,
7925                                     GdkRectangle  *pos)
7926 {
7927   GtkTextIter insert;
7928
7929   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
7930                                     gtk_text_buffer_get_insert (get_buffer (text_view)));
7931
7932   gtk_text_layout_get_cursor_locations (text_view->priv->layout, &insert, pos, NULL);
7933 }
7934
7935 static void
7936 gtk_text_view_get_virtual_cursor_pos (GtkTextView *text_view,
7937                                       GtkTextIter *cursor,
7938                                       gint        *x,
7939                                       gint        *y)
7940 {
7941   GtkTextViewPrivate *priv;
7942   GtkTextIter insert;
7943   GdkRectangle pos;
7944
7945   priv = text_view->priv;
7946
7947   if (cursor)
7948     insert = *cursor;
7949   else
7950     gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
7951                                       gtk_text_buffer_get_insert (get_buffer (text_view)));
7952
7953   if ((x && priv->virtual_cursor_x == -1) ||
7954       (y && priv->virtual_cursor_y == -1))
7955     gtk_text_layout_get_cursor_locations (priv->layout, &insert, &pos, NULL);
7956
7957   if (x)
7958     {
7959       if (priv->virtual_cursor_x != -1)
7960         *x = priv->virtual_cursor_x;
7961       else
7962         *x = pos.x;
7963     }
7964
7965   if (y)
7966     {
7967       if (priv->virtual_cursor_x != -1)
7968         *y = priv->virtual_cursor_y;
7969       else
7970         *y = pos.y + pos.height / 2;
7971     }
7972 }
7973
7974 static void
7975 gtk_text_view_set_virtual_cursor_pos (GtkTextView *text_view,
7976                                       gint         x,
7977                                       gint         y)
7978 {
7979   GdkRectangle pos;
7980
7981   if (!text_view->priv->layout)
7982     return;
7983
7984   if (x == -1 || y == -1)
7985     gtk_text_view_get_cursor_location (text_view, &pos);
7986
7987   text_view->priv->virtual_cursor_x = (x == -1) ? pos.x : x;
7988   text_view->priv->virtual_cursor_y = (y == -1) ? pos.y + pos.height / 2 : y;
7989 }
7990
7991 /* Quick hack of a popup menu
7992  */
7993 static void
7994 activate_cb (GtkWidget   *menuitem,
7995              GtkTextView *text_view)
7996 {
7997   const gchar *signal = g_object_get_data (G_OBJECT (menuitem), "gtk-signal");
7998   g_signal_emit_by_name (text_view, signal);
7999 }
8000
8001 static void
8002 append_action_signal (GtkTextView  *text_view,
8003                       GtkWidget    *menu,
8004                       const gchar  *stock_id,
8005                       const gchar  *signal,
8006                       gboolean      sensitive)
8007 {
8008   GtkWidget *menuitem = gtk_image_menu_item_new_from_stock (stock_id, NULL);
8009
8010   g_object_set_data (G_OBJECT (menuitem), I_("gtk-signal"), (char *)signal);
8011   g_signal_connect (menuitem, "activate",
8012                     G_CALLBACK (activate_cb), text_view);
8013
8014   gtk_widget_set_sensitive (menuitem, sensitive);
8015
8016   gtk_widget_show (menuitem);
8017   gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
8018 }
8019
8020 static void
8021 gtk_text_view_select_all (GtkWidget *widget,
8022                           gboolean select)
8023 {
8024   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
8025   GtkTextBuffer *buffer;
8026   GtkTextIter start_iter, end_iter, insert;
8027
8028   buffer = text_view->priv->buffer;
8029   if (select)
8030     {
8031       gtk_text_buffer_get_bounds (buffer, &start_iter, &end_iter);
8032       gtk_text_buffer_select_range (buffer, &start_iter, &end_iter);
8033     }
8034   else
8035     {
8036       gtk_text_buffer_get_iter_at_mark (buffer, &insert,
8037                                         gtk_text_buffer_get_insert (buffer));
8038       gtk_text_buffer_move_mark_by_name (buffer, "selection_bound", &insert);
8039     }
8040 }
8041
8042 static void
8043 select_all_cb (GtkWidget   *menuitem,
8044                GtkTextView *text_view)
8045 {
8046   gtk_text_view_select_all (GTK_WIDGET (text_view), TRUE);
8047 }
8048
8049 static void
8050 delete_cb (GtkTextView *text_view)
8051 {
8052   gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
8053                                     text_view->priv->editable);
8054 }
8055
8056 static void
8057 popup_menu_detach (GtkWidget *attach_widget,
8058                    GtkMenu   *menu)
8059 {
8060   GTK_TEXT_VIEW (attach_widget)->priv->popup_menu = NULL;
8061 }
8062
8063 static void
8064 popup_position_func (GtkMenu   *menu,
8065                      gint      *x,
8066                      gint      *y,
8067                      gboolean  *push_in,
8068                      gpointer   user_data)
8069 {
8070   GtkAllocation allocation;
8071   GtkTextView *text_view;
8072   GtkWidget *widget;
8073   GdkRectangle cursor_rect;
8074   GdkRectangle onscreen_rect;
8075   gint root_x, root_y;
8076   GtkTextIter iter;
8077   GtkRequisition req;
8078   GdkScreen *screen;
8079   gint monitor_num;
8080   GdkRectangle monitor;
8081
8082   text_view = GTK_TEXT_VIEW (user_data);
8083   widget = GTK_WIDGET (text_view);
8084
8085   g_return_if_fail (gtk_widget_get_realized (widget));
8086
8087   screen = gtk_widget_get_screen (widget);
8088
8089   gdk_window_get_origin (gtk_widget_get_window (widget),
8090                          &root_x, &root_y);
8091
8092   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
8093                                     &iter,
8094                                     gtk_text_buffer_get_insert (get_buffer (text_view)));
8095
8096   gtk_text_view_get_iter_location (text_view,
8097                                    &iter,
8098                                    &cursor_rect);
8099
8100   gtk_text_view_get_visible_rect (text_view, &onscreen_rect);
8101
8102   gtk_size_request_get_size (GTK_SIZE_REQUEST (text_view->priv->popup_menu),
8103                              &req, NULL);
8104
8105   gtk_widget_get_allocation (widget, &allocation);
8106
8107   /* can't use rectangle_intersect since cursor rect can have 0 width */
8108   if (cursor_rect.x >= onscreen_rect.x &&
8109       cursor_rect.x < onscreen_rect.x + onscreen_rect.width &&
8110       cursor_rect.y >= onscreen_rect.y &&
8111       cursor_rect.y < onscreen_rect.y + onscreen_rect.height)
8112     {
8113       gtk_text_view_buffer_to_window_coords (text_view,
8114                                              GTK_TEXT_WINDOW_WIDGET,
8115                                              cursor_rect.x, cursor_rect.y,
8116                                              &cursor_rect.x, &cursor_rect.y);
8117
8118       *x = root_x + cursor_rect.x + cursor_rect.width;
8119       *y = root_y + cursor_rect.y + cursor_rect.height;
8120     }
8121   else
8122     {
8123       /* Just center the menu, since cursor is offscreen. */
8124       *x = root_x + (allocation.width / 2 - req.width / 2);
8125       *y = root_y + (allocation.height / 2 - req.height / 2);
8126     }
8127
8128   /* Ensure sanity */
8129   *x = CLAMP (*x, root_x, (root_x + allocation.width));
8130   *y = CLAMP (*y, root_y, (root_y + allocation.height));
8131
8132   monitor_num = gdk_screen_get_monitor_at_point (screen, *x, *y);
8133   gtk_menu_set_monitor (menu, monitor_num);
8134   gdk_screen_get_monitor_geometry (screen, monitor_num, &monitor);
8135
8136   *x = CLAMP (*x, monitor.x, monitor.x + MAX (0, monitor.width - req.width));
8137   *y = CLAMP (*y, monitor.y, monitor.y + MAX (0, monitor.height - req.height));
8138
8139   *push_in = FALSE;
8140 }
8141
8142 typedef struct
8143 {
8144   GtkTextView *text_view;
8145   gint button;
8146   guint time;
8147 } PopupInfo;
8148
8149 static gboolean
8150 range_contains_editable_text (const GtkTextIter *start,
8151                               const GtkTextIter *end,
8152                               gboolean default_editability)
8153 {
8154   GtkTextIter iter = *start;
8155
8156   while (gtk_text_iter_compare (&iter, end) < 0)
8157     {
8158       if (gtk_text_iter_editable (&iter, default_editability))
8159         return TRUE;
8160
8161       gtk_text_iter_forward_to_tag_toggle (&iter, NULL);
8162     }
8163
8164   return FALSE;
8165 }
8166
8167 static void
8168 unichar_chosen_func (const char *text,
8169                      gpointer    data)
8170 {
8171   GtkTextView *text_view = GTK_TEXT_VIEW (data);
8172
8173   gtk_text_view_commit_text (text_view, text);
8174 }
8175
8176 static void
8177 popup_targets_received (GtkClipboard     *clipboard,
8178                         GtkSelectionData *data,
8179                         gpointer          user_data)
8180 {
8181   PopupInfo *info = user_data;
8182   GtkTextView *text_view;
8183   GtkTextViewPrivate *priv;
8184
8185   text_view = info->text_view;
8186   priv = text_view->priv;
8187
8188   if (gtk_widget_get_realized (GTK_WIDGET (text_view)))
8189     {
8190       /* We implicitely rely here on the fact that if we are pasting ourself, we'll
8191        * have text targets as well as the private GTK_TEXT_BUFFER_CONTENTS target.
8192        */
8193       gboolean clipboard_contains_text;
8194       GtkWidget *menuitem;
8195       GtkWidget *submenu;
8196       gboolean have_selection;
8197       gboolean can_insert;
8198       GtkTextIter iter;
8199       GtkTextIter sel_start, sel_end;
8200       gboolean show_input_method_menu;
8201       gboolean show_unicode_menu;
8202
8203       clipboard_contains_text = gtk_selection_data_targets_include_text (data);
8204
8205       if (priv->popup_menu)
8206         gtk_widget_destroy (priv->popup_menu);
8207
8208       priv->popup_menu = gtk_menu_new ();
8209
8210       gtk_menu_attach_to_widget (GTK_MENU (priv->popup_menu),
8211                                  GTK_WIDGET (text_view),
8212                                  popup_menu_detach);
8213
8214       have_selection = gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
8215                                                              &sel_start, &sel_end);
8216
8217       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
8218                                         &iter,
8219                                         gtk_text_buffer_get_insert (get_buffer (text_view)));
8220
8221       can_insert = gtk_text_iter_can_insert (&iter, priv->editable);
8222
8223       append_action_signal (text_view, priv->popup_menu, GTK_STOCK_CUT, "cut-clipboard",
8224                             have_selection &&
8225                             range_contains_editable_text (&sel_start, &sel_end,
8226                                                           priv->editable));
8227       append_action_signal (text_view, priv->popup_menu, GTK_STOCK_COPY, "copy-clipboard",
8228                             have_selection);
8229       append_action_signal (text_view, priv->popup_menu, GTK_STOCK_PASTE, "paste-clipboard",
8230                             can_insert && clipboard_contains_text);
8231
8232       menuitem = gtk_image_menu_item_new_from_stock (GTK_STOCK_DELETE, NULL);
8233       gtk_widget_set_sensitive (menuitem,
8234                                 have_selection &&
8235                                 range_contains_editable_text (&sel_start, &sel_end,
8236                                                               priv->editable));
8237       g_signal_connect_swapped (menuitem, "activate",
8238                                 G_CALLBACK (delete_cb), text_view);
8239       gtk_widget_show (menuitem);
8240       gtk_menu_shell_append (GTK_MENU_SHELL (priv->popup_menu), menuitem);
8241
8242       menuitem = gtk_separator_menu_item_new ();
8243       gtk_widget_show (menuitem);
8244       gtk_menu_shell_append (GTK_MENU_SHELL (priv->popup_menu), menuitem);
8245
8246       menuitem = gtk_image_menu_item_new_from_stock (GTK_STOCK_SELECT_ALL, NULL);
8247       g_signal_connect (menuitem, "activate",
8248                         G_CALLBACK (select_all_cb), text_view);
8249       gtk_widget_show (menuitem);
8250       gtk_menu_shell_append (GTK_MENU_SHELL (priv->popup_menu), menuitem);
8251
8252       g_object_get (gtk_widget_get_settings (GTK_WIDGET (text_view)),
8253                     "gtk-show-input-method-menu", &show_input_method_menu,
8254                     "gtk-show-unicode-menu", &show_unicode_menu,
8255                     NULL);
8256
8257       if (show_input_method_menu || show_unicode_menu)
8258         {
8259           menuitem = gtk_separator_menu_item_new ();
8260           gtk_widget_show (menuitem);
8261           gtk_menu_shell_append (GTK_MENU_SHELL (priv->popup_menu), menuitem);
8262         }
8263
8264       if (show_input_method_menu)
8265         {
8266           menuitem = gtk_menu_item_new_with_mnemonic (_("Input _Methods"));
8267           gtk_widget_show (menuitem);
8268           gtk_widget_set_sensitive (menuitem, can_insert);
8269
8270           submenu = gtk_menu_new ();
8271           gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), submenu);
8272           gtk_menu_shell_append (GTK_MENU_SHELL (priv->popup_menu), menuitem);
8273
8274           gtk_im_multicontext_append_menuitems (GTK_IM_MULTICONTEXT (priv->im_context),
8275                                                 GTK_MENU_SHELL (submenu));
8276         }
8277
8278       if (show_unicode_menu)
8279         {
8280           menuitem = gtk_menu_item_new_with_mnemonic (_("_Insert Unicode Control Character"));
8281           gtk_widget_show (menuitem);
8282           gtk_widget_set_sensitive (menuitem, can_insert);
8283
8284           submenu = gtk_menu_new ();
8285           gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), submenu);
8286           gtk_menu_shell_append (GTK_MENU_SHELL (priv->popup_menu), menuitem);
8287
8288           _gtk_text_util_append_special_char_menuitems (GTK_MENU_SHELL (submenu),
8289                                                         unichar_chosen_func,
8290                                                         text_view);
8291         }
8292
8293       g_signal_emit (text_view,
8294                      signals[POPULATE_POPUP],
8295                      0,
8296                      priv->popup_menu);
8297
8298       if (info->button)
8299         gtk_menu_popup (GTK_MENU (priv->popup_menu), NULL, NULL,
8300                         NULL, NULL,
8301                         info->button, info->time);
8302       else
8303         {
8304           gtk_menu_popup (GTK_MENU (priv->popup_menu), NULL, NULL,
8305                           popup_position_func, text_view,
8306                           0, gtk_get_current_event_time ());
8307           gtk_menu_shell_select_first (GTK_MENU_SHELL (priv->popup_menu), FALSE);
8308         }
8309     }
8310
8311   g_object_unref (text_view);
8312   g_free (info);
8313 }
8314
8315 static void
8316 gtk_text_view_do_popup (GtkTextView    *text_view,
8317                         GdkEventButton *event)
8318 {
8319   PopupInfo *info = g_new (PopupInfo, 1);
8320
8321   /* In order to know what entries we should make sensitive, we
8322    * ask for the current targets of the clipboard, and when
8323    * we get them, then we actually pop up the menu.
8324    */
8325   info->text_view = g_object_ref (text_view);
8326
8327   if (event)
8328     {
8329       info->button = event->button;
8330       info->time = event->time;
8331     }
8332   else
8333     {
8334       info->button = 0;
8335       info->time = gtk_get_current_event_time ();
8336     }
8337
8338   gtk_clipboard_request_contents (gtk_widget_get_clipboard (GTK_WIDGET (text_view),
8339                                                             GDK_SELECTION_CLIPBOARD),
8340                                   gdk_atom_intern_static_string ("TARGETS"),
8341                                   popup_targets_received,
8342                                   info);
8343 }
8344
8345 static gboolean
8346 gtk_text_view_popup_menu (GtkWidget *widget)
8347 {
8348   gtk_text_view_do_popup (GTK_TEXT_VIEW (widget), NULL);
8349   return TRUE;
8350 }
8351
8352 /* Child GdkWindows */
8353
8354
8355 static GtkTextWindow*
8356 text_window_new (GtkTextWindowType  type,
8357                  GtkWidget         *widget,
8358                  gint               width_request,
8359                  gint               height_request)
8360 {
8361   GtkTextWindow *win;
8362
8363   win = g_new (GtkTextWindow, 1);
8364
8365   win->type = type;
8366   win->widget = widget;
8367   win->window = NULL;
8368   win->bin_window = NULL;
8369   win->requisition.width = width_request;
8370   win->requisition.height = height_request;
8371   win->allocation.width = width_request;
8372   win->allocation.height = height_request;
8373   win->allocation.x = 0;
8374   win->allocation.y = 0;
8375
8376   return win;
8377 }
8378
8379 static void
8380 text_window_free (GtkTextWindow *win)
8381 {
8382   if (win->window)
8383     text_window_unrealize (win);
8384
8385   g_free (win);
8386 }
8387
8388 static void
8389 text_window_realize (GtkTextWindow *win,
8390                      GtkWidget     *widget)
8391 {
8392   GdkWindow *window;
8393   GdkWindowAttr attributes;
8394   gint attributes_mask;
8395   GdkCursor *cursor;
8396
8397   attributes.window_type = GDK_WINDOW_CHILD;
8398   attributes.x = win->allocation.x;
8399   attributes.y = win->allocation.y;
8400   attributes.width = win->allocation.width;
8401   attributes.height = win->allocation.height;
8402   attributes.wclass = GDK_INPUT_OUTPUT;
8403   attributes.visual = gtk_widget_get_visual (win->widget);
8404   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK;
8405
8406   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
8407
8408   window = gtk_widget_get_window (widget);
8409
8410   win->window = gdk_window_new (window,
8411                                 &attributes, attributes_mask);
8412
8413   gdk_window_show (win->window);
8414   gdk_window_set_user_data (win->window, win->widget);
8415   gdk_window_lower (win->window);
8416
8417   attributes.x = 0;
8418   attributes.y = 0;
8419   attributes.width = win->allocation.width;
8420   attributes.height = win->allocation.height;
8421   attributes.event_mask = (GDK_EXPOSURE_MASK            |
8422                            GDK_SCROLL_MASK              |
8423                            GDK_KEY_PRESS_MASK           |
8424                            GDK_BUTTON_PRESS_MASK        |
8425                            GDK_BUTTON_RELEASE_MASK      |
8426                            GDK_POINTER_MOTION_MASK      |
8427                            GDK_POINTER_MOTION_HINT_MASK |
8428                            gtk_widget_get_events (win->widget));
8429
8430   win->bin_window = gdk_window_new (win->window,
8431                                     &attributes,
8432                                     attributes_mask);
8433
8434   gdk_window_show (win->bin_window);
8435   gdk_window_set_user_data (win->bin_window, win->widget);
8436
8437   if (win->type == GTK_TEXT_WINDOW_TEXT)
8438     {
8439       if (gtk_widget_is_sensitive (widget))
8440         {
8441           /* I-beam cursor */
8442           cursor = gdk_cursor_new_for_display (gdk_window_get_display (window),
8443                                                GDK_XTERM);
8444           gdk_window_set_cursor (win->bin_window, cursor);
8445           gdk_cursor_unref (cursor);
8446         }
8447
8448       gtk_im_context_set_client_window (GTK_TEXT_VIEW (widget)->priv->im_context,
8449                                         win->window);
8450
8451
8452       gdk_window_set_background (win->bin_window,
8453                                  &gtk_widget_get_style (widget)->base[gtk_widget_get_state (widget)]);
8454     }
8455   else
8456     {
8457       gdk_window_set_background (win->bin_window,
8458                                  &gtk_widget_get_style (widget)->bg[gtk_widget_get_state (widget)]);
8459     }
8460
8461   g_object_set_qdata (G_OBJECT (win->window),
8462                       g_quark_from_static_string ("gtk-text-view-text-window"),
8463                       win);
8464
8465   g_object_set_qdata (G_OBJECT (win->bin_window),
8466                       g_quark_from_static_string ("gtk-text-view-text-window"),
8467                       win);
8468 }
8469
8470 static void
8471 text_window_unrealize (GtkTextWindow *win)
8472 {
8473   if (win->type == GTK_TEXT_WINDOW_TEXT)
8474     {
8475       gtk_im_context_set_client_window (GTK_TEXT_VIEW (win->widget)->priv->im_context,
8476                                         NULL);
8477     }
8478
8479   gdk_window_set_user_data (win->window, NULL);
8480   gdk_window_set_user_data (win->bin_window, NULL);
8481   gdk_window_destroy (win->bin_window);
8482   gdk_window_destroy (win->window);
8483   win->window = NULL;
8484   win->bin_window = NULL;
8485 }
8486
8487 static void
8488 text_window_size_allocate (GtkTextWindow *win,
8489                            GdkRectangle  *rect)
8490 {
8491   win->allocation = *rect;
8492
8493   if (win->window)
8494     {
8495       gdk_window_move_resize (win->window,
8496                               rect->x, rect->y,
8497                               rect->width, rect->height);
8498
8499       gdk_window_resize (win->bin_window,
8500                          rect->width, rect->height);
8501     }
8502 }
8503
8504 static void
8505 text_window_scroll        (GtkTextWindow *win,
8506                            gint           dx,
8507                            gint           dy)
8508 {
8509   if (dx != 0 || dy != 0)
8510     {
8511       gdk_window_scroll (win->bin_window, dx, dy);
8512     }
8513 }
8514
8515 static void
8516 text_window_invalidate_rect (GtkTextWindow *win,
8517                              GdkRectangle  *rect)
8518 {
8519   GdkRectangle window_rect;
8520
8521   gtk_text_view_buffer_to_window_coords (GTK_TEXT_VIEW (win->widget),
8522                                          win->type,
8523                                          rect->x,
8524                                          rect->y,
8525                                          &window_rect.x,
8526                                          &window_rect.y);
8527
8528   window_rect.width = rect->width;
8529   window_rect.height = rect->height;
8530
8531   /* Adjust the rect as appropriate */
8532
8533   switch (win->type)
8534     {
8535     case GTK_TEXT_WINDOW_TEXT:
8536       break;
8537
8538     case GTK_TEXT_WINDOW_LEFT:
8539     case GTK_TEXT_WINDOW_RIGHT:
8540       window_rect.x = 0;
8541       window_rect.width = win->allocation.width;
8542       break;
8543
8544     case GTK_TEXT_WINDOW_TOP:
8545     case GTK_TEXT_WINDOW_BOTTOM:
8546       window_rect.y = 0;
8547       window_rect.height = win->allocation.height;
8548       break;
8549
8550     default:
8551       g_warning ("%s: bug!", G_STRFUNC);
8552       return;
8553       break;
8554     }
8555
8556   gdk_window_invalidate_rect (win->bin_window, &window_rect, FALSE);
8557
8558 #if 0
8559   {
8560     cairo_t *cr = gdk_cairo_create (win->bin_window);
8561     gdk_cairo_rectangle (cr, &window_rect);
8562     cairo_set_source_rgb  (cr, 1.0, 0.0, 0.0);  /* red */
8563     cairo_fill (cr);
8564     cairo_destroy (cr);
8565   }
8566 #endif
8567 }
8568
8569 static void
8570 text_window_invalidate_cursors (GtkTextWindow *win)
8571 {
8572   GtkTextView *text_view;
8573   GtkTextViewPrivate *priv;
8574   GtkTextIter  iter;
8575   GdkRectangle strong;
8576   GdkRectangle weak;
8577   gboolean     draw_arrow;
8578   gfloat       cursor_aspect_ratio;
8579   gint         stem_width;
8580   gint         arrow_width;
8581
8582   text_view = GTK_TEXT_VIEW (win->widget);
8583   priv = text_view->priv;
8584
8585   gtk_text_buffer_get_iter_at_mark (priv->buffer, &iter,
8586                                     gtk_text_buffer_get_insert (priv->buffer));
8587
8588   if (_gtk_text_layout_get_block_cursor (priv->layout, &strong))
8589     {
8590       text_window_invalidate_rect (win, &strong);
8591       return;
8592     }
8593
8594   gtk_text_layout_get_cursor_locations (priv->layout, &iter,
8595                                         &strong, &weak);
8596
8597   /* cursor width calculation as in gtkstyle.c:draw_insertion_cursor(),
8598    * ignoring the text direction be exposing both sides of the cursor
8599    */
8600
8601   draw_arrow = (strong.x != weak.x || strong.y != weak.y);
8602
8603   gtk_widget_style_get (win->widget,
8604                         "cursor-aspect-ratio", &cursor_aspect_ratio,
8605                         NULL);
8606
8607   stem_width = strong.height * cursor_aspect_ratio + 1;
8608   arrow_width = stem_width + 1;
8609
8610   strong.width = stem_width;
8611
8612   /* round up to the next even number */
8613   if (stem_width & 1)
8614     stem_width++;
8615
8616   strong.x     -= stem_width / 2;
8617   strong.width += stem_width;
8618
8619   if (draw_arrow)
8620     {
8621       strong.x     -= arrow_width;
8622       strong.width += arrow_width * 2;
8623     }
8624
8625   text_window_invalidate_rect (win, &strong);
8626
8627   if (draw_arrow) /* == have weak */
8628     {
8629       stem_width = weak.height * cursor_aspect_ratio + 1;
8630       arrow_width = stem_width + 1;
8631
8632       weak.width = stem_width;
8633
8634       /* round up to the next even number */
8635       if (stem_width & 1)
8636         stem_width++;
8637
8638       weak.x     -= stem_width / 2;
8639       weak.width += stem_width;
8640
8641       weak.x     -= arrow_width;
8642       weak.width += arrow_width * 2;
8643
8644       text_window_invalidate_rect (win, &weak);
8645     }
8646 }
8647
8648 static gint
8649 text_window_get_width (GtkTextWindow *win)
8650 {
8651   return win->allocation.width;
8652 }
8653
8654 static gint
8655 text_window_get_height (GtkTextWindow *win)
8656 {
8657   return win->allocation.height;
8658 }
8659
8660 /* Windows */
8661
8662
8663 /**
8664  * gtk_text_view_get_window:
8665  * @text_view: a #GtkTextView
8666  * @win: window to get
8667  *
8668  * Retrieves the #GdkWindow corresponding to an area of the text view;
8669  * possible windows include the overall widget window, child windows
8670  * on the left, right, top, bottom, and the window that displays the
8671  * text buffer. Windows are %NULL and nonexistent if their width or
8672  * height is 0, and are nonexistent before the widget has been
8673  * realized.
8674  *
8675  * Return value: (transfer none): a #GdkWindow, or %NULL
8676  **/
8677 GdkWindow*
8678 gtk_text_view_get_window (GtkTextView *text_view,
8679                           GtkTextWindowType win)
8680 {
8681   GtkTextViewPrivate *priv = text_view->priv;
8682
8683   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
8684
8685   switch (win)
8686     {
8687     case GTK_TEXT_WINDOW_WIDGET:
8688       return gtk_widget_get_window (GTK_WIDGET (text_view));
8689       break;
8690
8691     case GTK_TEXT_WINDOW_TEXT:
8692       return priv->text_window->bin_window;
8693       break;
8694
8695     case GTK_TEXT_WINDOW_LEFT:
8696       if (priv->left_window)
8697         return priv->left_window->bin_window;
8698       else
8699         return NULL;
8700       break;
8701
8702     case GTK_TEXT_WINDOW_RIGHT:
8703       if (priv->right_window)
8704         return priv->right_window->bin_window;
8705       else
8706         return NULL;
8707       break;
8708
8709     case GTK_TEXT_WINDOW_TOP:
8710       if (priv->top_window)
8711         return priv->top_window->bin_window;
8712       else
8713         return NULL;
8714       break;
8715
8716     case GTK_TEXT_WINDOW_BOTTOM:
8717       if (priv->bottom_window)
8718         return priv->bottom_window->bin_window;
8719       else
8720         return NULL;
8721       break;
8722
8723     case GTK_TEXT_WINDOW_PRIVATE:
8724       g_warning ("%s: You can't get GTK_TEXT_WINDOW_PRIVATE, it has \"PRIVATE\" in the name because it is private.", G_STRFUNC);
8725       return NULL;
8726       break;
8727     }
8728
8729   g_warning ("%s: Unknown GtkTextWindowType", G_STRFUNC);
8730   return NULL;
8731 }
8732
8733 /**
8734  * gtk_text_view_get_window_type:
8735  * @text_view: a #GtkTextView
8736  * @window: a window type
8737  *
8738  * Usually used to find out which window an event corresponds to.
8739  * If you connect to an event signal on @text_view, this function
8740  * should be called on <literal>event-&gt;window</literal> to
8741  * see which window it was.
8742  *
8743  * Return value: the window type.
8744  **/
8745 GtkTextWindowType
8746 gtk_text_view_get_window_type (GtkTextView *text_view,
8747                                GdkWindow   *window)
8748 {
8749   GtkTextWindow *win;
8750
8751   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
8752   g_return_val_if_fail (GDK_IS_WINDOW (window), 0);
8753
8754   if (window == gtk_widget_get_window (GTK_WIDGET (text_view)))
8755     return GTK_TEXT_WINDOW_WIDGET;
8756
8757   win = g_object_get_qdata (G_OBJECT (window),
8758                             g_quark_try_string ("gtk-text-view-text-window"));
8759
8760   if (win)
8761     return win->type;
8762   else
8763     {
8764       return GTK_TEXT_WINDOW_PRIVATE;
8765     }
8766 }
8767
8768 static void
8769 buffer_to_widget (GtkTextView      *text_view,
8770                   gint              buffer_x,
8771                   gint              buffer_y,
8772                   gint             *window_x,
8773                   gint             *window_y)
8774 {
8775   GtkTextViewPrivate *priv = text_view->priv;
8776
8777   if (window_x)
8778     {
8779       *window_x = buffer_x - priv->xoffset;
8780       *window_x += priv->text_window->allocation.x;
8781     }
8782
8783   if (window_y)
8784     {
8785       *window_y = buffer_y - priv->yoffset;
8786       *window_y += priv->text_window->allocation.y;
8787     }
8788 }
8789
8790 static void
8791 widget_to_text_window (GtkTextWindow *win,
8792                        gint           widget_x,
8793                        gint           widget_y,
8794                        gint          *window_x,
8795                        gint          *window_y)
8796 {
8797   if (window_x)
8798     *window_x = widget_x - win->allocation.x;
8799
8800   if (window_y)
8801     *window_y = widget_y - win->allocation.y;
8802 }
8803
8804 static void
8805 buffer_to_text_window (GtkTextView   *text_view,
8806                        GtkTextWindow *win,
8807                        gint           buffer_x,
8808                        gint           buffer_y,
8809                        gint          *window_x,
8810                        gint          *window_y)
8811 {
8812   if (win == NULL)
8813     {
8814       g_warning ("Attempt to convert text buffer coordinates to coordinates "
8815                  "for a nonexistent or private child window of GtkTextView");
8816       return;
8817     }
8818
8819   buffer_to_widget (text_view,
8820                     buffer_x, buffer_y,
8821                     window_x, window_y);
8822
8823   widget_to_text_window (win,
8824                          window_x ? *window_x : 0,
8825                          window_y ? *window_y : 0,
8826                          window_x,
8827                          window_y);
8828 }
8829
8830 /**
8831  * gtk_text_view_buffer_to_window_coords:
8832  * @text_view: a #GtkTextView
8833  * @win: a #GtkTextWindowType except #GTK_TEXT_WINDOW_PRIVATE
8834  * @buffer_x: buffer x coordinate
8835  * @buffer_y: buffer y coordinate
8836  * @window_x: (out) (allow-none): window x coordinate return location or %NULL
8837  * @window_y: (out) (allow-none): window y coordinate return location or %NULL
8838  *
8839  * Converts coordinate (@buffer_x, @buffer_y) to coordinates for the window
8840  * @win, and stores the result in (@window_x, @window_y).
8841  *
8842  * Note that you can't convert coordinates for a nonexisting window (see
8843  * gtk_text_view_set_border_window_size()).
8844  **/
8845 void
8846 gtk_text_view_buffer_to_window_coords (GtkTextView      *text_view,
8847                                        GtkTextWindowType win,
8848                                        gint              buffer_x,
8849                                        gint              buffer_y,
8850                                        gint             *window_x,
8851                                        gint             *window_y)
8852 {
8853   GtkTextViewPrivate *priv = text_view->priv;
8854
8855   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
8856
8857   switch (win)
8858     {
8859     case GTK_TEXT_WINDOW_WIDGET:
8860       buffer_to_widget (text_view,
8861                         buffer_x, buffer_y,
8862                         window_x, window_y);
8863       break;
8864
8865     case GTK_TEXT_WINDOW_TEXT:
8866       if (window_x)
8867         *window_x = buffer_x - priv->xoffset;
8868       if (window_y)
8869         *window_y = buffer_y - priv->yoffset;
8870       break;
8871
8872     case GTK_TEXT_WINDOW_LEFT:
8873       buffer_to_text_window (text_view,
8874                              priv->left_window,
8875                              buffer_x, buffer_y,
8876                              window_x, window_y);
8877       break;
8878
8879     case GTK_TEXT_WINDOW_RIGHT:
8880       buffer_to_text_window (text_view,
8881                              priv->right_window,
8882                              buffer_x, buffer_y,
8883                              window_x, window_y);
8884       break;
8885
8886     case GTK_TEXT_WINDOW_TOP:
8887       buffer_to_text_window (text_view,
8888                              priv->top_window,
8889                              buffer_x, buffer_y,
8890                              window_x, window_y);
8891       break;
8892
8893     case GTK_TEXT_WINDOW_BOTTOM:
8894       buffer_to_text_window (text_view,
8895                              priv->bottom_window,
8896                              buffer_x, buffer_y,
8897                              window_x, window_y);
8898       break;
8899
8900     case GTK_TEXT_WINDOW_PRIVATE:
8901       g_warning ("%s: can't get coords for private windows", G_STRFUNC);
8902       break;
8903
8904     default:
8905       g_warning ("%s: Unknown GtkTextWindowType", G_STRFUNC);
8906       break;
8907     }
8908 }
8909
8910 static void
8911 widget_to_buffer (GtkTextView *text_view,
8912                   gint         widget_x,
8913                   gint         widget_y,
8914                   gint        *buffer_x,
8915                   gint        *buffer_y)
8916 {
8917   GtkTextViewPrivate *priv = text_view->priv;
8918
8919   if (buffer_x)
8920     {
8921       *buffer_x = widget_x + priv->xoffset;
8922       *buffer_x -= priv->text_window->allocation.x;
8923     }
8924
8925   if (buffer_y)
8926     {
8927       *buffer_y = widget_y + priv->yoffset;
8928       *buffer_y -= priv->text_window->allocation.y;
8929     }
8930 }
8931
8932 static void
8933 text_window_to_widget (GtkTextWindow *win,
8934                        gint           window_x,
8935                        gint           window_y,
8936                        gint          *widget_x,
8937                        gint          *widget_y)
8938 {
8939   if (widget_x)
8940     *widget_x = window_x + win->allocation.x;
8941
8942   if (widget_y)
8943     *widget_y = window_y + win->allocation.y;
8944 }
8945
8946 static void
8947 text_window_to_buffer (GtkTextView   *text_view,
8948                        GtkTextWindow *win,
8949                        gint           window_x,
8950                        gint           window_y,
8951                        gint          *buffer_x,
8952                        gint          *buffer_y)
8953 {
8954   if (win == NULL)
8955     {
8956       g_warning ("Attempt to convert GtkTextView buffer coordinates into "
8957                  "coordinates for a nonexistent child window.");
8958       return;
8959     }
8960
8961   text_window_to_widget (win,
8962                          window_x,
8963                          window_y,
8964                          buffer_x,
8965                          buffer_y);
8966
8967   widget_to_buffer (text_view,
8968                     buffer_x ? *buffer_x : 0,
8969                     buffer_y ? *buffer_y : 0,
8970                     buffer_x,
8971                     buffer_y);
8972 }
8973
8974 /**
8975  * gtk_text_view_window_to_buffer_coords:
8976  * @text_view: a #GtkTextView
8977  * @win: a #GtkTextWindowType except #GTK_TEXT_WINDOW_PRIVATE
8978  * @window_x: window x coordinate
8979  * @window_y: window y coordinate
8980  * @buffer_x: (out) (allow-none): buffer x coordinate return location or %NULL
8981  * @buffer_y: (out) (allow-none): buffer y coordinate return location or %NULL
8982  *
8983  * Converts coordinates on the window identified by @win to buffer
8984  * coordinates, storing the result in (@buffer_x,@buffer_y).
8985  *
8986  * Note that you can't convert coordinates for a nonexisting window (see
8987  * gtk_text_view_set_border_window_size()).
8988  **/
8989 void
8990 gtk_text_view_window_to_buffer_coords (GtkTextView      *text_view,
8991                                        GtkTextWindowType win,
8992                                        gint              window_x,
8993                                        gint              window_y,
8994                                        gint             *buffer_x,
8995                                        gint             *buffer_y)
8996 {
8997   GtkTextViewPrivate *priv = text_view->priv;
8998
8999   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
9000
9001   switch (win)
9002     {
9003     case GTK_TEXT_WINDOW_WIDGET:
9004       widget_to_buffer (text_view,
9005                         window_x, window_y,
9006                         buffer_x, buffer_y);
9007       break;
9008
9009     case GTK_TEXT_WINDOW_TEXT:
9010       if (buffer_x)
9011         *buffer_x = window_x + priv->xoffset;
9012       if (buffer_y)
9013         *buffer_y = window_y + priv->yoffset;
9014       break;
9015
9016     case GTK_TEXT_WINDOW_LEFT:
9017       text_window_to_buffer (text_view,
9018                              priv->left_window,
9019                              window_x, window_y,
9020                              buffer_x, buffer_y);
9021       break;
9022
9023     case GTK_TEXT_WINDOW_RIGHT:
9024       text_window_to_buffer (text_view,
9025                              priv->right_window,
9026                              window_x, window_y,
9027                              buffer_x, buffer_y);
9028       break;
9029
9030     case GTK_TEXT_WINDOW_TOP:
9031       text_window_to_buffer (text_view,
9032                              priv->top_window,
9033                              window_x, window_y,
9034                              buffer_x, buffer_y);
9035       break;
9036
9037     case GTK_TEXT_WINDOW_BOTTOM:
9038       text_window_to_buffer (text_view,
9039                              priv->bottom_window,
9040                              window_x, window_y,
9041                              buffer_x, buffer_y);
9042       break;
9043
9044     case GTK_TEXT_WINDOW_PRIVATE:
9045       g_warning ("%s: can't get coords for private windows", G_STRFUNC);
9046       break;
9047
9048     default:
9049       g_warning ("%s: Unknown GtkTextWindowType", G_STRFUNC);
9050       break;
9051     }
9052 }
9053
9054 static void
9055 set_window_width (GtkTextView      *text_view,
9056                   gint              width,
9057                   GtkTextWindowType type,
9058                   GtkTextWindow   **winp)
9059 {
9060   if (width == 0)
9061     {
9062       if (*winp)
9063         {
9064           text_window_free (*winp);
9065           *winp = NULL;
9066           gtk_widget_queue_resize (GTK_WIDGET (text_view));
9067         }
9068     }
9069   else
9070     {
9071       if (*winp == NULL)
9072         {
9073           *winp = text_window_new (type,
9074                                    GTK_WIDGET (text_view),
9075                                    width, 0);
9076           /* if the widget is already realized we need to realize the child manually */
9077           if (gtk_widget_get_realized (GTK_WIDGET (text_view)))
9078             text_window_realize (*winp, GTK_WIDGET (text_view));
9079         }
9080       else
9081         {
9082           if ((*winp)->requisition.width == width)
9083             return;
9084
9085           (*winp)->requisition.width = width;
9086         }
9087
9088       gtk_widget_queue_resize (GTK_WIDGET (text_view));
9089     }
9090 }
9091
9092
9093 static void
9094 set_window_height (GtkTextView      *text_view,
9095                    gint              height,
9096                    GtkTextWindowType type,
9097                    GtkTextWindow   **winp)
9098 {
9099   if (height == 0)
9100     {
9101       if (*winp)
9102         {
9103           text_window_free (*winp);
9104           *winp = NULL;
9105           gtk_widget_queue_resize (GTK_WIDGET (text_view));
9106         }
9107     }
9108   else
9109     {
9110       if (*winp == NULL)
9111         {
9112           *winp = text_window_new (type,
9113                                    GTK_WIDGET (text_view),
9114                                    0, height);
9115
9116           /* if the widget is already realized we need to realize the child manually */
9117           if (gtk_widget_get_realized (GTK_WIDGET (text_view)))
9118             text_window_realize (*winp, GTK_WIDGET (text_view));
9119         }
9120       else
9121         {
9122           if ((*winp)->requisition.height == height)
9123             return;
9124
9125           (*winp)->requisition.height = height;
9126         }
9127
9128       gtk_widget_queue_resize (GTK_WIDGET (text_view));
9129     }
9130 }
9131
9132 /**
9133  * gtk_text_view_set_border_window_size:
9134  * @text_view: a #GtkTextView
9135  * @type: window to affect
9136  * @size: width or height of the window
9137  *
9138  * Sets the width of %GTK_TEXT_WINDOW_LEFT or %GTK_TEXT_WINDOW_RIGHT,
9139  * or the height of %GTK_TEXT_WINDOW_TOP or %GTK_TEXT_WINDOW_BOTTOM.
9140  * Automatically destroys the corresponding window if the size is set
9141  * to 0, and creates the window if the size is set to non-zero.  This
9142  * function can only be used for the "border windows," it doesn't work
9143  * with #GTK_TEXT_WINDOW_WIDGET, #GTK_TEXT_WINDOW_TEXT, or
9144  * #GTK_TEXT_WINDOW_PRIVATE.
9145  **/
9146 void
9147 gtk_text_view_set_border_window_size (GtkTextView      *text_view,
9148                                       GtkTextWindowType type,
9149                                       gint              size)
9150 {
9151   GtkTextViewPrivate *priv = text_view->priv;
9152
9153   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
9154   g_return_if_fail (size >= 0);
9155
9156   switch (type)
9157     {
9158     case GTK_TEXT_WINDOW_LEFT:
9159       set_window_width (text_view, size, GTK_TEXT_WINDOW_LEFT,
9160                         &priv->left_window);
9161       break;
9162
9163     case GTK_TEXT_WINDOW_RIGHT:
9164       set_window_width (text_view, size, GTK_TEXT_WINDOW_RIGHT,
9165                         &priv->right_window);
9166       break;
9167
9168     case GTK_TEXT_WINDOW_TOP:
9169       set_window_height (text_view, size, GTK_TEXT_WINDOW_TOP,
9170                          &priv->top_window);
9171       break;
9172
9173     case GTK_TEXT_WINDOW_BOTTOM:
9174       set_window_height (text_view, size, GTK_TEXT_WINDOW_BOTTOM,
9175                          &priv->bottom_window);
9176       break;
9177
9178     default:
9179       g_warning ("Can only set size of left/right/top/bottom border windows with gtk_text_view_set_border_window_size()");
9180       break;
9181     }
9182 }
9183
9184 /**
9185  * gtk_text_view_get_border_window_size:
9186  * @text_view: a #GtkTextView
9187  * @type: window to return size from
9188  *
9189  * Gets the width of the specified border window. See
9190  * gtk_text_view_set_border_window_size().
9191  *
9192  * Return value: width of window
9193  **/
9194 gint
9195 gtk_text_view_get_border_window_size (GtkTextView       *text_view,
9196                                       GtkTextWindowType  type)
9197 {
9198   GtkTextViewPrivate *priv = text_view->priv;
9199
9200   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
9201
9202   switch (type)
9203     {
9204     case GTK_TEXT_WINDOW_LEFT:
9205       if (priv->left_window)
9206         return priv->left_window->requisition.width;
9207       break;
9208
9209     case GTK_TEXT_WINDOW_RIGHT:
9210       if (priv->right_window)
9211         return priv->right_window->requisition.width;
9212       break;
9213
9214     case GTK_TEXT_WINDOW_TOP:
9215       if (priv->top_window)
9216         return priv->top_window->requisition.height;
9217       break;
9218
9219     case GTK_TEXT_WINDOW_BOTTOM:
9220       if (priv->bottom_window)
9221         return priv->bottom_window->requisition.height;
9222       break;
9223
9224     default:
9225       g_warning ("Can only get size of left/right/top/bottom border windows with gtk_text_view_get_border_window_size()");
9226       break;
9227     }
9228
9229   return 0;
9230 }
9231
9232 /*
9233  * Child widgets
9234  */
9235
9236 static GtkTextViewChild*
9237 text_view_child_new_anchored (GtkWidget          *child,
9238                               GtkTextChildAnchor *anchor,
9239                               GtkTextLayout      *layout)
9240 {
9241   GtkTextViewChild *vc;
9242
9243   vc = g_new (GtkTextViewChild, 1);
9244
9245   vc->type = GTK_TEXT_WINDOW_PRIVATE;
9246   vc->widget = child;
9247   vc->anchor = anchor;
9248
9249   vc->from_top_of_line = 0;
9250   vc->from_left_of_buffer = 0;
9251
9252   g_object_ref (vc->widget);
9253   g_object_ref (vc->anchor);
9254
9255   g_object_set_data (G_OBJECT (child),
9256                      I_("gtk-text-view-child"),
9257                      vc);
9258
9259   gtk_text_child_anchor_register_child (anchor, child, layout);
9260
9261   return vc;
9262 }
9263
9264 static GtkTextViewChild*
9265 text_view_child_new_window (GtkWidget          *child,
9266                             GtkTextWindowType   type,
9267                             gint                x,
9268                             gint                y)
9269 {
9270   GtkTextViewChild *vc;
9271
9272   vc = g_new (GtkTextViewChild, 1);
9273
9274   vc->widget = child;
9275   vc->anchor = NULL;
9276
9277   vc->from_top_of_line = 0;
9278   vc->from_left_of_buffer = 0;
9279
9280   g_object_ref (vc->widget);
9281
9282   vc->type = type;
9283   vc->x = x;
9284   vc->y = y;
9285
9286   g_object_set_data (G_OBJECT (child),
9287                      I_("gtk-text-view-child"),
9288                      vc);
9289
9290   return vc;
9291 }
9292
9293 static void
9294 text_view_child_free (GtkTextViewChild *child)
9295 {
9296   g_object_set_data (G_OBJECT (child->widget),
9297                      I_("gtk-text-view-child"), NULL);
9298
9299   if (child->anchor)
9300     {
9301       gtk_text_child_anchor_unregister_child (child->anchor,
9302                                               child->widget);
9303       g_object_unref (child->anchor);
9304     }
9305
9306   g_object_unref (child->widget);
9307
9308   g_free (child);
9309 }
9310
9311 static void
9312 text_view_child_set_parent_window (GtkTextView      *text_view,
9313                                    GtkTextViewChild *vc)
9314 {
9315   if (vc->anchor)
9316     gtk_widget_set_parent_window (vc->widget,
9317                                   text_view->priv->text_window->bin_window);
9318   else
9319     {
9320       GdkWindow *window;
9321       window = gtk_text_view_get_window (text_view,
9322                                          vc->type);
9323       gtk_widget_set_parent_window (vc->widget, window);
9324     }
9325 }
9326
9327 static void
9328 add_child (GtkTextView      *text_view,
9329            GtkTextViewChild *vc)
9330 {
9331   text_view->priv->children = g_slist_prepend (text_view->priv->children,
9332                                                vc);
9333
9334   if (gtk_widget_get_realized (GTK_WIDGET (text_view)))
9335     text_view_child_set_parent_window (text_view, vc);
9336
9337   gtk_widget_set_parent (vc->widget, GTK_WIDGET (text_view));
9338 }
9339
9340 /**
9341  * gtk_text_view_add_child_at_anchor:
9342  * @text_view: a #GtkTextView
9343  * @child: a #GtkWidget
9344  * @anchor: a #GtkTextChildAnchor in the #GtkTextBuffer for @text_view
9345  *
9346  * Adds a child widget in the text buffer, at the given @anchor.
9347  **/
9348 void
9349 gtk_text_view_add_child_at_anchor (GtkTextView          *text_view,
9350                                    GtkWidget            *child,
9351                                    GtkTextChildAnchor   *anchor)
9352 {
9353   GtkTextViewChild *vc;
9354
9355   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
9356   g_return_if_fail (GTK_IS_WIDGET (child));
9357   g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
9358   g_return_if_fail (gtk_widget_get_parent (child) == NULL);
9359
9360   gtk_text_view_ensure_layout (text_view);
9361
9362   vc = text_view_child_new_anchored (child, anchor,
9363                                      text_view->priv->layout);
9364
9365   add_child (text_view, vc);
9366
9367   g_assert (vc->widget == child);
9368   g_assert (gtk_widget_get_parent (child) == GTK_WIDGET (text_view));
9369 }
9370
9371 /**
9372  * gtk_text_view_add_child_in_window:
9373  * @text_view: a #GtkTextView
9374  * @child: a #GtkWidget
9375  * @which_window: which window the child should appear in
9376  * @xpos: X position of child in window coordinates
9377  * @ypos: Y position of child in window coordinates
9378  *
9379  * Adds a child at fixed coordinates in one of the text widget's
9380  * windows. The window must have nonzero size (see
9381  * gtk_text_view_set_border_window_size()). Note that the child
9382  * coordinates are given relative to the #GdkWindow in question, and
9383  * that these coordinates have no sane relationship to scrolling. When
9384  * placing a child in #GTK_TEXT_WINDOW_WIDGET, scrolling is
9385  * irrelevant, the child floats above all scrollable areas. But when
9386  * placing a child in one of the scrollable windows (border windows or
9387  * text window), you'll need to compute the child's correct position
9388  * in buffer coordinates any time scrolling occurs or buffer changes
9389  * occur, and then call gtk_text_view_move_child() to update the
9390  * child's position. Unfortunately there's no good way to detect that
9391  * scrolling has occurred, using the current API; a possible hack
9392  * would be to update all child positions when the scroll adjustments
9393  * change or the text buffer changes. See bug 64518 on
9394  * bugzilla.gnome.org for status of fixing this issue.
9395  **/
9396 void
9397 gtk_text_view_add_child_in_window (GtkTextView       *text_view,
9398                                    GtkWidget         *child,
9399                                    GtkTextWindowType  which_window,
9400                                    gint               xpos,
9401                                    gint               ypos)
9402 {
9403   GtkTextViewChild *vc;
9404
9405   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
9406   g_return_if_fail (GTK_IS_WIDGET (child));
9407   g_return_if_fail (gtk_widget_get_parent (child) == NULL);
9408
9409   vc = text_view_child_new_window (child, which_window,
9410                                    xpos, ypos);
9411
9412   add_child (text_view, vc);
9413
9414   g_assert (vc->widget == child);
9415   g_assert (gtk_widget_get_parent (child) == GTK_WIDGET (text_view));
9416 }
9417
9418 /**
9419  * gtk_text_view_move_child:
9420  * @text_view: a #GtkTextView
9421  * @child: child widget already added to the text view
9422  * @xpos: new X position in window coordinates
9423  * @ypos: new Y position in window coordinates
9424  *
9425  * Updates the position of a child, as for gtk_text_view_add_child_in_window().
9426  **/
9427 void
9428 gtk_text_view_move_child (GtkTextView *text_view,
9429                           GtkWidget   *child,
9430                           gint         xpos,
9431                           gint         ypos)
9432 {
9433   GtkTextViewChild *vc;
9434
9435   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
9436   g_return_if_fail (GTK_IS_WIDGET (child));
9437   g_return_if_fail (gtk_widget_get_parent (child) == GTK_WIDGET (text_view));
9438
9439   vc = g_object_get_data (G_OBJECT (child),
9440                           "gtk-text-view-child");
9441
9442   g_assert (vc != NULL);
9443
9444   if (vc->x == xpos &&
9445       vc->y == ypos)
9446     return;
9447
9448   vc->x = xpos;
9449   vc->y = ypos;
9450
9451   if (gtk_widget_get_visible (child) &&
9452       gtk_widget_get_visible (GTK_WIDGET (text_view)))
9453     gtk_widget_queue_resize (child);
9454 }
9455
9456
9457 /* Iterator operations */
9458
9459 /**
9460  * gtk_text_view_forward_display_line:
9461  * @text_view: a #GtkTextView
9462  * @iter: a #GtkTextIter
9463  *
9464  * Moves the given @iter forward by one display (wrapped) line.
9465  * A display line is different from a paragraph. Paragraphs are
9466  * separated by newlines or other paragraph separator characters.
9467  * Display lines are created by line-wrapping a paragraph. If
9468  * wrapping is turned off, display lines and paragraphs will be the
9469  * same. Display lines are divided differently for each view, since
9470  * they depend on the view's width; paragraphs are the same in all
9471  * views, since they depend on the contents of the #GtkTextBuffer.
9472  *
9473  * Return value: %TRUE if @iter was moved and is not on the end iterator
9474  **/
9475 gboolean
9476 gtk_text_view_forward_display_line (GtkTextView *text_view,
9477                                     GtkTextIter *iter)
9478 {
9479   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
9480   g_return_val_if_fail (iter != NULL, FALSE);
9481
9482   gtk_text_view_ensure_layout (text_view);
9483
9484   return gtk_text_layout_move_iter_to_next_line (text_view->priv->layout, iter);
9485 }
9486
9487 /**
9488  * gtk_text_view_backward_display_line:
9489  * @text_view: a #GtkTextView
9490  * @iter: a #GtkTextIter
9491  *
9492  * Moves the given @iter backward by one display (wrapped) line.
9493  * A display line is different from a paragraph. Paragraphs are
9494  * separated by newlines or other paragraph separator characters.
9495  * Display lines are created by line-wrapping a paragraph. If
9496  * wrapping is turned off, display lines and paragraphs will be the
9497  * same. Display lines are divided differently for each view, since
9498  * they depend on the view's width; paragraphs are the same in all
9499  * views, since they depend on the contents of the #GtkTextBuffer.
9500  *
9501  * Return value: %TRUE if @iter was moved and is not on the end iterator
9502  **/
9503 gboolean
9504 gtk_text_view_backward_display_line (GtkTextView *text_view,
9505                                      GtkTextIter *iter)
9506 {
9507   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
9508   g_return_val_if_fail (iter != NULL, FALSE);
9509
9510   gtk_text_view_ensure_layout (text_view);
9511
9512   return gtk_text_layout_move_iter_to_previous_line (text_view->priv->layout, iter);
9513 }
9514
9515 /**
9516  * gtk_text_view_forward_display_line_end:
9517  * @text_view: a #GtkTextView
9518  * @iter: a #GtkTextIter
9519  *
9520  * Moves the given @iter forward to the next display line end.
9521  * A display line is different from a paragraph. Paragraphs are
9522  * separated by newlines or other paragraph separator characters.
9523  * Display lines are created by line-wrapping a paragraph. If
9524  * wrapping is turned off, display lines and paragraphs will be the
9525  * same. Display lines are divided differently for each view, since
9526  * they depend on the view's width; paragraphs are the same in all
9527  * views, since they depend on the contents of the #GtkTextBuffer.
9528  *
9529  * Return value: %TRUE if @iter was moved and is not on the end iterator
9530  **/
9531 gboolean
9532 gtk_text_view_forward_display_line_end (GtkTextView *text_view,
9533                                         GtkTextIter *iter)
9534 {
9535   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
9536   g_return_val_if_fail (iter != NULL, FALSE);
9537
9538   gtk_text_view_ensure_layout (text_view);
9539
9540   return gtk_text_layout_move_iter_to_line_end (text_view->priv->layout, iter, 1);
9541 }
9542
9543 /**
9544  * gtk_text_view_backward_display_line_start:
9545  * @text_view: a #GtkTextView
9546  * @iter: a #GtkTextIter
9547  *
9548  * Moves the given @iter backward to the next display line start.
9549  * A display line is different from a paragraph. Paragraphs are
9550  * separated by newlines or other paragraph separator characters.
9551  * Display lines are created by line-wrapping a paragraph. If
9552  * wrapping is turned off, display lines and paragraphs will be the
9553  * same. Display lines are divided differently for each view, since
9554  * they depend on the view's width; paragraphs are the same in all
9555  * views, since they depend on the contents of the #GtkTextBuffer.
9556  *
9557  * Return value: %TRUE if @iter was moved and is not on the end iterator
9558  **/
9559 gboolean
9560 gtk_text_view_backward_display_line_start (GtkTextView *text_view,
9561                                            GtkTextIter *iter)
9562 {
9563   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
9564   g_return_val_if_fail (iter != NULL, FALSE);
9565
9566   gtk_text_view_ensure_layout (text_view);
9567
9568   return gtk_text_layout_move_iter_to_line_end (text_view->priv->layout, iter, -1);
9569 }
9570
9571 /**
9572  * gtk_text_view_starts_display_line:
9573  * @text_view: a #GtkTextView
9574  * @iter: a #GtkTextIter
9575  *
9576  * Determines whether @iter is at the start of a display line.
9577  * See gtk_text_view_forward_display_line() for an explanation of
9578  * display lines vs. paragraphs.
9579  *
9580  * Return value: %TRUE if @iter begins a wrapped line
9581  **/
9582 gboolean
9583 gtk_text_view_starts_display_line (GtkTextView       *text_view,
9584                                    const GtkTextIter *iter)
9585 {
9586   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
9587   g_return_val_if_fail (iter != NULL, FALSE);
9588
9589   gtk_text_view_ensure_layout (text_view);
9590
9591   return gtk_text_layout_iter_starts_line (text_view->priv->layout, iter);
9592 }
9593
9594 /**
9595  * gtk_text_view_move_visually:
9596  * @text_view: a #GtkTextView
9597  * @iter: a #GtkTextIter
9598  * @count: number of characters to move (negative moves left,
9599  *    positive moves right)
9600  *
9601  * Move the iterator a given number of characters visually, treating
9602  * it as the strong cursor position. If @count is positive, then the
9603  * new strong cursor position will be @count positions to the right of
9604  * the old cursor position. If @count is negative then the new strong
9605  * cursor position will be @count positions to the left of the old
9606  * cursor position.
9607  *
9608  * In the presence of bi-directional text, the correspondence
9609  * between logical and visual order will depend on the direction
9610  * of the current run, and there may be jumps when the cursor
9611  * is moved off of the end of a run.
9612  *
9613  * Return value: %TRUE if @iter moved and is not on the end iterator
9614  **/
9615 gboolean
9616 gtk_text_view_move_visually (GtkTextView *text_view,
9617                              GtkTextIter *iter,
9618                              gint         count)
9619 {
9620   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
9621   g_return_val_if_fail (iter != NULL, FALSE);
9622
9623   gtk_text_view_ensure_layout (text_view);
9624
9625   return gtk_text_layout_move_iter_visually (text_view->priv->layout, iter, count);
9626 }