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

   1 /* GTK - The GIMP Toolkit
   2  * gtktextview.c Copyright (C) 2000 Red Hat, Inc.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include <string.h>
  28
  29 #define GTK_TEXT_USE_INTERNAL_UNSUPPORTED_API
  30 #include "gtkbindings.h"
  31 #include "gtkdnd.h"
  32 #include "gtkimagemenuitem.h"
  33 #include "gtkintl.h"
  34 #include "gtkmain.h"
  35 #include "gtkmarshalers.h"
  36 #include "gtkmenu.h"
  37 #include "gtkmenuitem.h"
  38 #include "gtkseparatormenuitem.h"
  39 #include "gtksettings.h"
  40 #include "gtksignal.h"
  41 #include "gtkstock.h"
  42 #include "gtktextdisplay.h"
  43 #include "gtktextview.h"
  44 #include "gtkimmulticontext.h"
  45 #include "gdk/gdkkeysyms.h"
  46 #include "gtksizegroup.h"          /* FIXME http://bugzilla.gnome.org/show_bug.cgi?id=72258 */
  47 #include "gtktextutil.h"
  48 #include "gtkwindow.h"
  49 #include <string.h>
  50
  51 /* How scrolling, validation, exposes, etc. work.
  52  *
  53  * The expose_event handler has the invariant that the onscreen lines
  54  * have been validated.
  55  *
  56  * There are two ways that onscreen lines can become invalid. The first
  57  * is to change which lines are onscreen. This happens when the value
  58  * of a scroll adjustment changes. So the code path begins in
  59  * gtk_text_view_value_changed() and goes like this:
  60  *   - gdk_window_scroll() to reflect the new adjustment value
  61  *   - validate the lines that were moved onscreen
  62  *   - gdk_window_process_updates() to handle the exposes immediately
  63  *
  64  * The second way is that you get the "invalidated" signal from the layout,
  65  * indicating that lines have become invalid. This code path begins in
  66  * invalidated_handler() and goes like this:
  67  *   - install high-priority idle which does the rest of the steps
  68  *   - if a scroll is pending from scroll_to_mark(), do the scroll,
  69  *     jumping to the gtk_text_view_value_changed() code path
  70  *   - otherwise, validate the onscreen lines
  71  *   - DO NOT process updates
  72  *
  73  * In both cases, validating the onscreen lines can trigger a scroll
  74  * due to maintaining the first_para on the top of the screen.
  75  * If validation triggers a scroll, we jump to the top of the code path
  76  * for value_changed, and bail out of the current code path.
  77  *
  78  * Also, in size_allocate, if we invalidate some lines from changing
  79  * the layout width, we need to go ahead and run the high-priority idle,
  80  * because GTK sends exposes right after doing the size allocates without
  81  * returning to the main loop. This is also why the high-priority idle
  82  * is at a higher priority than resizing.
  83  *
  84  */
  85
  86 #if 0
  87 #define DEBUG_VALIDATION_AND_SCROLLING
  88 #endif
  89
  90 #ifdef DEBUG_VALIDATION_AND_SCROLLING
  91 #define DV(x) (x)
  92 #else
  93 #define DV(x)
  94 #endif
  95
  96 #define SCREEN_WIDTH(widget) text_window_get_width (GTK_TEXT_VIEW (widget)->text_window)
  97 #define SCREEN_HEIGHT(widget) text_window_get_height (GTK_TEXT_VIEW (widget)->text_window)
  98
  99 struct _GtkTextPendingScroll
 100 {
 101   GtkTextMark   *mark;
 102   gdouble        within_margin;
 103   gboolean       use_align;
 104   gdouble        xalign;
 105   gdouble        yalign;
 106 };
 107
 108 enum
 109 {
 110   SET_SCROLL_ADJUSTMENTS,
 111   POPULATE_POPUP,
 112   MOVE_CURSOR,
 113   PAGE_HORIZONTALLY,
 114   SET_ANCHOR,
 115   INSERT_AT_CURSOR,
 116   DELETE_FROM_CURSOR,
 117   CUT_CLIPBOARD,
 118   COPY_CLIPBOARD,
 119   PASTE_CLIPBOARD,
 120   TOGGLE_OVERWRITE,
 121   MOVE_FOCUS,
 122   LAST_SIGNAL
 123 };
 124
 125 enum
 126 {
 127   PROP_0,
 128   PROP_PIXELS_ABOVE_LINES,
 129   PROP_PIXELS_BELOW_LINES,
 130   PROP_PIXELS_INSIDE_WRAP,
 131   PROP_EDITABLE,
 132   PROP_WRAP_MODE,
 133   PROP_JUSTIFICATION,
 134   PROP_LEFT_MARGIN,
 135   PROP_RIGHT_MARGIN,
 136   PROP_INDENT,
 137   PROP_TABS,
 138   PROP_CURSOR_VISIBLE,
 139   LAST_PROP
 140 };
 141
 142 static void gtk_text_view_init                 (GtkTextView      *text_view);
 143 static void gtk_text_view_class_init           (GtkTextViewClass *klass);
 144 static void gtk_text_view_destroy              (GtkObject        *object);
 145 static void gtk_text_view_finalize             (GObject          *object);
 146 static void gtk_text_view_set_property         (GObject         *object,
 147                                                 guint            prop_id,
 148                                                 const GValue    *value,
 149                                                 GParamSpec      *pspec);
 150 static void gtk_text_view_get_property         (GObject         *object,
 151                                                 guint            prop_id,
 152                                                 GValue          *value,
 153                                                 GParamSpec      *pspec);
 154 static void gtk_text_view_size_request         (GtkWidget        *widget,
 155                                                 GtkRequisition   *requisition);
 156 static void gtk_text_view_size_allocate        (GtkWidget        *widget,
 157                                                 GtkAllocation    *allocation);
 158 static void gtk_text_view_realize              (GtkWidget        *widget);
 159 static void gtk_text_view_unrealize            (GtkWidget        *widget);
 160 static void gtk_text_view_style_set            (GtkWidget        *widget,
 161                                                 GtkStyle         *previous_style);
 162 static void gtk_text_view_direction_changed    (GtkWidget        *widget,
 163                                                 GtkTextDirection  previous_direction);
 164 static gint gtk_text_view_event                (GtkWidget        *widget,
 165                                                 GdkEvent         *event);
 166 static gint gtk_text_view_key_press_event      (GtkWidget        *widget,
 167                                                 GdkEventKey      *event);
 168 static gint gtk_text_view_key_release_event    (GtkWidget        *widget,
 169                                                 GdkEventKey      *event);
 170 static gint gtk_text_view_button_press_event   (GtkWidget        *widget,
 171                                                 GdkEventButton   *event);
 172 static gint gtk_text_view_button_release_event (GtkWidget        *widget,
 173                                                 GdkEventButton   *event);
 174 static gint gtk_text_view_focus_in_event       (GtkWidget        *widget,
 175                                                 GdkEventFocus    *event);
 176 static gint gtk_text_view_focus_out_event      (GtkWidget        *widget,
 177                                                 GdkEventFocus    *event);
 178 static gint gtk_text_view_motion_event         (GtkWidget        *widget,
 179                                                 GdkEventMotion   *event);
 180 static gint gtk_text_view_expose_event         (GtkWidget        *widget,
 181                                                 GdkEventExpose   *expose);
 182 static void gtk_text_view_draw_focus           (GtkWidget        *widget);
 183 static void gtk_text_view_grab_focus           (GtkWidget        *widget);
 184 static gboolean gtk_text_view_focus            (GtkWidget        *widget,
 185                                                 GtkDirectionType  direction);
 186
 187
 188 /* Source side drag signals */
 189 static void gtk_text_view_drag_begin       (GtkWidget        *widget,
 190                                             GdkDragContext   *context);
 191 static void gtk_text_view_drag_end         (GtkWidget        *widget,
 192                                             GdkDragContext   *context);
 193 static void gtk_text_view_drag_data_get    (GtkWidget        *widget,
 194                                             GdkDragContext   *context,
 195                                             GtkSelectionData *selection_data,
 196                                             guint             info,
 197                                             guint             time);
 198 static void gtk_text_view_drag_data_delete (GtkWidget        *widget,
 199                                             GdkDragContext   *context);
 200
 201 /* Target side drag signals */
 202 static void     gtk_text_view_drag_leave         (GtkWidget        *widget,
 203                                                   GdkDragContext   *context,
 204                                                   guint             time);
 205 static gboolean gtk_text_view_drag_motion        (GtkWidget        *widget,
 206                                                   GdkDragContext   *context,
 207                                                   gint              x,
 208                                                   gint              y,
 209                                                   guint             time);
 210 static gboolean gtk_text_view_drag_drop          (GtkWidget        *widget,
 211                                                   GdkDragContext   *context,
 212                                                   gint              x,
 213                                                   gint              y,
 214                                                   guint             time);
 215 static void     gtk_text_view_drag_data_received (GtkWidget        *widget,
 216                                                   GdkDragContext   *context,
 217                                                   gint              x,
 218                                                   gint              y,
 219                                                   GtkSelectionData *selection_data,
 220                                                   guint             info,
 221                                                   guint             time);
 222
 223 static void gtk_text_view_set_scroll_adjustments (GtkTextView   *text_view,
 224                                                   GtkAdjustment *hadj,
 225                                                   GtkAdjustment *vadj);
 226 static gboolean gtk_text_view_popup_menu         (GtkWidget     *widget);
 227
 228 static void gtk_text_view_move_cursor       (GtkTextView           *text_view,
 229                                              GtkMovementStep        step,
 230                                              gint                   count,
 231                                              gboolean               extend_selection);
 232 static void gtk_text_view_page_horizontally (GtkTextView          *text_view,
 233                                              gint                  count,
 234                                              gboolean              extend_selection);
 235 static void gtk_text_view_set_anchor       (GtkTextView           *text_view);
 236 static void gtk_text_view_scroll_pages     (GtkTextView           *text_view,
 237                                             gint                   count);
 238 static void gtk_text_view_scroll_hpages    (GtkTextView           *text_view,
 239                                             gint                   count);
 240 static void gtk_text_view_insert_at_cursor (GtkTextView           *text_view,
 241                                             const gchar           *str);
 242 static void gtk_text_view_delete_from_cursor (GtkTextView           *text_view,
 243                                               GtkDeleteType          type,
 244                                               gint                   count);
 245 static void gtk_text_view_cut_clipboard    (GtkTextView           *text_view);
 246 static void gtk_text_view_copy_clipboard   (GtkTextView           *text_view);
 247 static void gtk_text_view_paste_clipboard  (GtkTextView           *text_view);
 248 static void gtk_text_view_toggle_overwrite (GtkTextView           *text_view);
 249 static void gtk_text_view_move_focus       (GtkTextView           *text_view,
 250                                             GtkDirectionType       direction_type);
 251 static void gtk_text_view_unselect         (GtkTextView           *text_view);
 252
 253 static void     gtk_text_view_validate_onscreen     (GtkTextView        *text_view);
 254 static void     gtk_text_view_get_first_para_iter   (GtkTextView        *text_view,
 255                                                      GtkTextIter        *iter);
 256 static void     gtk_text_view_update_layout_width       (GtkTextView        *text_view);
 257 static void     gtk_text_view_set_attributes_from_style (GtkTextView        *text_view,
 258                                                          GtkTextAttributes *values,
 259                                                          GtkStyle           *style);
 260 static void     gtk_text_view_ensure_layout          (GtkTextView        *text_view);
 261 static void     gtk_text_view_destroy_layout         (GtkTextView        *text_view);
 262 static void     gtk_text_view_check_keymap_direction (GtkTextView        *text_view);
 263 static void     gtk_text_view_reset_im_context       (GtkTextView        *text_view);
 264 static void     gtk_text_view_start_selection_drag   (GtkTextView        *text_view,
 265                                                       const GtkTextIter  *iter,
 266                                                       GdkEventButton     *event);
 267 static gboolean gtk_text_view_end_selection_drag     (GtkTextView        *text_view,
 268                                                       GdkEventButton     *event);
 269 static void     gtk_text_view_start_selection_dnd    (GtkTextView        *text_view,
 270                                                       const GtkTextIter  *iter,
 271                                                       GdkEventMotion     *event);
 272 static void     gtk_text_view_check_cursor_blink     (GtkTextView        *text_view);
 273 static void     gtk_text_view_pend_cursor_blink      (GtkTextView        *text_view);
 274 static void     gtk_text_view_stop_cursor_blink      (GtkTextView        *text_view);
 275
 276 static void     gtk_text_view_value_changed                (GtkAdjustment *adj,
 277                                                             GtkTextView   *view);
 278 static void     gtk_text_view_commit_handler               (GtkIMContext  *context,
 279                                                             const gchar   *str,
 280                                                             GtkTextView   *text_view);
 281 static void     gtk_text_view_commit_text                  (GtkTextView   *text_view,
 282                                                             const gchar   *text);
 283 static void     gtk_text_view_preedit_changed_handler      (GtkIMContext  *context,
 284                                                             GtkTextView   *text_view);
 285 static gboolean gtk_text_view_retrieve_surrounding_handler (GtkIMContext  *context,
 286                                                             GtkTextView   *text_view);
 287 static gboolean gtk_text_view_delete_surrounding_handler   (GtkIMContext  *context,
 288                                                             gint           offset,
 289                                                             gint           n_chars,
 290                                                             GtkTextView   *text_view);
 291
 292 static void gtk_text_view_mark_set_handler       (GtkTextBuffer     *buffer,
 293                                                   const GtkTextIter *location,
 294                                                   GtkTextMark       *mark,
 295                                                   gpointer           data);
 296 static void gtk_text_view_get_virtual_cursor_pos (GtkTextView       *text_view,
 297                                                   gint              *x,
 298                                                   gint              *y);
 299 static void gtk_text_view_set_virtual_cursor_pos (GtkTextView       *text_view,
 300                                                   gint               x,
 301                                                   gint               y);
 302
 303 static GtkAdjustment* get_hadjustment            (GtkTextView       *text_view);
 304 static GtkAdjustment* get_vadjustment            (GtkTextView       *text_view);
 305
 306 static void gtk_text_view_do_popup               (GtkTextView       *text_view,
 307                                                   GdkEventButton    *event);
 308
 309 static void gtk_text_view_queue_scroll           (GtkTextView   *text_view,
 310                                                   GtkTextMark   *mark,
 311                                                   gdouble        within_margin,
 312                                                   gboolean       use_align,
 313                                                   gdouble        xalign,
 314                                                   gdouble        yalign);
 315
 316 static gboolean gtk_text_view_flush_scroll         (GtkTextView *text_view);
 317 static void     gtk_text_view_update_adjustments   (GtkTextView *text_view);
 318 static void     gtk_text_view_invalidate           (GtkTextView *text_view);
 319 static void     gtk_text_view_flush_first_validate (GtkTextView *text_view);
 320
 321 static void gtk_text_view_update_im_spot_location (GtkTextView *text_view);
 322
 323 /* Container methods */
 324 static void gtk_text_view_add    (GtkContainer *container,
 325                                   GtkWidget    *child);
 326 static void gtk_text_view_remove (GtkContainer *container,
 327                                   GtkWidget    *child);
 328 static void gtk_text_view_forall (GtkContainer *container,
 329                                   gboolean      include_internals,
 330                                  GtkCallback   callback,
 331                                   gpointer      callback_data);
 332
 333 /* FIXME probably need the focus methods. */
 334
 335 typedef struct _GtkTextViewChild GtkTextViewChild;
 336
 337 struct _GtkTextViewChild
 338 {
 339   GtkWidget *widget;
 340
 341   GtkTextChildAnchor *anchor;
 342
 343   gint from_top_of_line;
 344   gint from_left_of_buffer;
 345
 346   /* These are ignored if anchor != NULL */
 347   GtkTextWindowType type;
 348   gint x;
 349   gint y;
 350 };
 351
 352 static GtkTextViewChild* text_view_child_new_anchored      (GtkWidget          *child,
 353                                                             GtkTextChildAnchor *anchor,
 354                                                             GtkTextLayout      *layout);
 355 static GtkTextViewChild* text_view_child_new_window        (GtkWidget          *child,
 356                                                             GtkTextWindowType   type,
 357                                                             gint                x,
 358                                                             gint                y);
 359 static void              text_view_child_free              (GtkTextViewChild   *child);
 360 static void              text_view_child_set_parent_window (GtkTextView        *text_view,
 361                                                             GtkTextViewChild   *child);
 362
 363 struct _GtkTextWindow
 364 {
 365   GtkTextWindowType type;
 366   GtkWidget *widget;
 367   GdkWindow *window;
 368   GdkWindow *bin_window;
 369   GtkRequisition requisition;
 370   GdkRectangle allocation;
 371 };
 372
 373 static GtkTextWindow *text_window_new             (GtkTextWindowType  type,
 374                                                    GtkWidget         *widget,
 375                                                    gint               width_request,
 376                                                    gint               height_request);
 377 static void           text_window_free            (GtkTextWindow     *win);
 378 static void           text_window_realize         (GtkTextWindow     *win,
 379                                                    GdkWindow         *parent);
 380 static void           text_window_unrealize       (GtkTextWindow     *win);
 381 static void           text_window_size_allocate   (GtkTextWindow     *win,
 382                                                    GdkRectangle      *rect);
 383 static void           text_window_scroll          (GtkTextWindow     *win,
 384                                                    gint               dx,
 385                                                    gint               dy);
 386 static void           text_window_invalidate_rect (GtkTextWindow     *win,
 387                                                    GdkRectangle      *rect);
 388
 389 static gint           text_window_get_width       (GtkTextWindow     *win);
 390 static gint           text_window_get_height      (GtkTextWindow     *win);
 391 static void           text_window_get_allocation  (GtkTextWindow     *win,
 392                                                    GdkRectangle      *rect);
 393
 394
 395 enum
 396 {
 397   TARGET_STRING,
 398   TARGET_TEXT,
 399   TARGET_COMPOUND_TEXT,
 400   TARGET_UTF8_STRING,
 401   TARGET_TEXT_BUFFER_CONTENTS
 402 };
 403
 404 static GtkTargetEntry target_table[] = {
 405   { "GTK_TEXT_BUFFER_CONTENTS", GTK_TARGET_SAME_APP,
 406     TARGET_TEXT_BUFFER_CONTENTS },
 407   { "UTF8_STRING", 0, TARGET_UTF8_STRING },
 408   { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
 409   { "TEXT", 0, TARGET_TEXT },
 410   { "STRING",     0, TARGET_STRING }
 411 };
 412
 413 static GtkContainerClass *parent_class = NULL;
 414 static guint signals[LAST_SIGNAL] = { 0 };
 415
 416 GtkType
 417 gtk_text_view_get_type (void)
 418 {
 419   static GtkType our_type = 0;
 420
 421   if (our_type == 0)
 422     {
 423       static const GtkTypeInfo our_info =
 424       {
 425         "GtkTextView",
 426         sizeof (GtkTextView),
 427         sizeof (GtkTextViewClass),
 428         (GtkClassInitFunc) gtk_text_view_class_init,
 429         (GtkObjectInitFunc) gtk_text_view_init,
 430         /* reserved_1 */ NULL,
 431         /* reserved_2 */ NULL,
 432         (GtkClassInitFunc) NULL
 433       };
 434
 435       our_type = gtk_type_unique (GTK_TYPE_CONTAINER, &our_info);
 436     }
 437
 438   return our_type;
 439 }
 440
 441 static void
 442 add_move_binding (GtkBindingSet  *binding_set,
 443                   guint           keyval,
 444                   guint           modmask,
 445                   GtkMovementStep step,
 446                   gint            count)
 447 {
 448   g_return_if_fail ((modmask & GDK_SHIFT_MASK) == 0);
 449
 450   gtk_binding_entry_add_signal (binding_set, keyval, modmask,
 451                                 "move_cursor", 3,
 452                                 GTK_TYPE_ENUM, step,
 453                                 GTK_TYPE_INT, count,
 454                                 GTK_TYPE_BOOL, FALSE);
 455
 456   /* Selection-extending version */
 457   gtk_binding_entry_add_signal (binding_set, keyval, modmask | GDK_SHIFT_MASK,
 458                                 "move_cursor", 3,
 459                                 GTK_TYPE_ENUM, step,
 460                                 GTK_TYPE_INT, count,
 461                                 GTK_TYPE_BOOL, TRUE);
 462 }
 463
 464 static void
 465 gtk_text_view_class_init (GtkTextViewClass *klass)
 466 {
 467   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 468   GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass);
 469   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 470   GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
 471   GtkBindingSet *binding_set;
 472
 473   parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
 474
 475   /* Default handlers and virtual methods
 476    */
 477   gobject_class->set_property = gtk_text_view_set_property;
 478   gobject_class->get_property = gtk_text_view_get_property;
 479
 480   object_class->destroy = gtk_text_view_destroy;
 481   gobject_class->finalize = gtk_text_view_finalize;
 482
 483   widget_class->realize = gtk_text_view_realize;
 484   widget_class->unrealize = gtk_text_view_unrealize;
 485   widget_class->style_set = gtk_text_view_style_set;
 486   widget_class->direction_changed = gtk_text_view_direction_changed;
 487   widget_class->size_request = gtk_text_view_size_request;
 488   widget_class->size_allocate = gtk_text_view_size_allocate;
 489   widget_class->event = gtk_text_view_event;
 490   widget_class->key_press_event = gtk_text_view_key_press_event;
 491   widget_class->key_release_event = gtk_text_view_key_release_event;
 492   widget_class->button_press_event = gtk_text_view_button_press_event;
 493   widget_class->button_release_event = gtk_text_view_button_release_event;
 494   widget_class->focus_in_event = gtk_text_view_focus_in_event;
 495   widget_class->focus_out_event = gtk_text_view_focus_out_event;
 496   widget_class->motion_notify_event = gtk_text_view_motion_event;
 497   widget_class->expose_event = gtk_text_view_expose_event;
 498   widget_class->grab_focus = gtk_text_view_grab_focus;
 499   widget_class->focus = gtk_text_view_focus;
 500
 501   widget_class->drag_begin = gtk_text_view_drag_begin;
 502   widget_class->drag_end = gtk_text_view_drag_end;
 503   widget_class->drag_data_get = gtk_text_view_drag_data_get;
 504   widget_class->drag_data_delete = gtk_text_view_drag_data_delete;
 505
 506   widget_class->drag_leave = gtk_text_view_drag_leave;
 507   widget_class->drag_motion = gtk_text_view_drag_motion;
 508   widget_class->drag_drop = gtk_text_view_drag_drop;
 509   widget_class->drag_data_received = gtk_text_view_drag_data_received;
 510
 511   widget_class->popup_menu = gtk_text_view_popup_menu;
 512
 513   container_class->add = gtk_text_view_add;
 514   container_class->remove = gtk_text_view_remove;
 515   container_class->forall = gtk_text_view_forall;
 516
 517   klass->move_cursor = gtk_text_view_move_cursor;
 518   klass->page_horizontally = gtk_text_view_page_horizontally;
 519   klass->set_anchor = gtk_text_view_set_anchor;
 520   klass->insert_at_cursor = gtk_text_view_insert_at_cursor;
 521   klass->delete_from_cursor = gtk_text_view_delete_from_cursor;
 522   klass->cut_clipboard = gtk_text_view_cut_clipboard;
 523   klass->copy_clipboard = gtk_text_view_copy_clipboard;
 524   klass->paste_clipboard = gtk_text_view_paste_clipboard;
 525   klass->toggle_overwrite = gtk_text_view_toggle_overwrite;
 526   klass->move_focus = gtk_text_view_move_focus;
 527   klass->set_scroll_adjustments = gtk_text_view_set_scroll_adjustments;
 528
 529   /*
 530    * Properties
 531    */
 532
 533   g_object_class_install_property (gobject_class,
 534                                    PROP_PIXELS_ABOVE_LINES,
 535                                    g_param_spec_int ("pixels_above_lines",
 536                                                      _("Pixels Above Lines"),
 537                                                      _("Pixels of blank space above paragraphs"),
 538                                                      0,
 539                                                      G_MAXINT,
 540                                                      0,
 541                                                      G_PARAM_READWRITE));
 542
 543   g_object_class_install_property (gobject_class,
 544                                    PROP_PIXELS_BELOW_LINES,
 545                                    g_param_spec_int ("pixels_below_lines",
 546                                                      _("Pixels Below Lines"),
 547                                                      _("Pixels of blank space below paragraphs"),
 548                                                      0,
 549                                                      G_MAXINT,
 550                                                      0,
 551                                                      G_PARAM_READWRITE));
 552
 553   g_object_class_install_property (gobject_class,
 554                                    PROP_PIXELS_INSIDE_WRAP,
 555                                    g_param_spec_int ("pixels_inside_wrap",
 556                                                      _("Pixels Inside Wrap"),
 557                                                      _("Pixels of blank space between wrapped lines in a paragraph"),
 558                                                      0,
 559                                                      G_MAXINT,
 560                                                      0,
 561                                                      G_PARAM_READWRITE));
 562
 563   g_object_class_install_property (gobject_class,
 564                                    PROP_EDITABLE,
 565                                    g_param_spec_boolean ("editable",
 566                                                          _("Editable"),
 567                                                          _("Whether the text can be modified by the user"),
 568                                                          TRUE,
 569                                                          G_PARAM_READWRITE));
 570
 571   g_object_class_install_property (gobject_class,
 572                                    PROP_WRAP_MODE,
 573                                    g_param_spec_enum ("wrap_mode",
 574                                                       _("Wrap Mode"),
 575                                                       _("Whether to wrap lines never, at word boundaries, or at character boundaries"),
 576                                                       GTK_TYPE_WRAP_MODE,
 577                                                       GTK_WRAP_NONE,
 578                                                       G_PARAM_READWRITE));
 579
 580   g_object_class_install_property (gobject_class,
 581                                    PROP_JUSTIFICATION,
 582                                    g_param_spec_enum ("justification",
 583                                                       _("Justification"),
 584                                                       _("Left, right, or center justification"),
 585                                                       GTK_TYPE_JUSTIFICATION,
 586                                                       GTK_JUSTIFY_LEFT,
 587                                                       G_PARAM_READWRITE));
 588
 589   g_object_class_install_property (gobject_class,
 590                                    PROP_LEFT_MARGIN,
 591                                    g_param_spec_int ("left_margin",
 592                                                      _("Left Margin"),
 593                                                      _("Width of the left margin in pixels"),
 594                                                      0,
 595                                                      G_MAXINT,
 596                                                      0,
 597                                                      G_PARAM_READWRITE));
 598
 599   g_object_class_install_property (gobject_class,
 600                                    PROP_RIGHT_MARGIN,
 601                                    g_param_spec_int ("right_margin",
 602                                                      _("Right Margin"),
 603                                                      _("Width of the right margin in pixels"),
 604                                                      0,
 605                                                      G_MAXINT,
 606                                                      0,
 607                                                      G_PARAM_READWRITE));
 608
 609   g_object_class_install_property (gobject_class,
 610                                    PROP_INDENT,
 611                                    g_param_spec_int ("indent",
 612                                                      _("Indent"),
 613                                                      _("Amount to indent the paragraph, in pixels"),
 614                                                      0,
 615                                                      G_MAXINT,
 616                                                      0,
 617                                                      G_PARAM_READWRITE));
 618
 619   g_object_class_install_property (gobject_class,
 620                                    PROP_TABS,
 621                                    g_param_spec_boxed ("tabs",
 622                                                        _("Tabs"),
 623                                                        _("Custom tabs for this text"),
 624                                                        PANGO_TYPE_TAB_ARRAY,
 625                                                        G_PARAM_READWRITE));
 626
 627   g_object_class_install_property (gobject_class,
 628                                    PROP_CURSOR_VISIBLE,
 629                                    g_param_spec_boolean ("cursor_visible",
 630                                                          _("Cursor Visible"),
 631                                                          _("If the insertion cursor is shown"),
 632                                                          TRUE,
 633                                                          G_PARAM_READWRITE));
 634
 635
 636   /*
 637    * Signals
 638    */
 639
 640   signals[MOVE_CURSOR] =
 641     gtk_signal_new ("move_cursor",
 642                     GTK_RUN_LAST | GTK_RUN_ACTION,
 643                     GTK_CLASS_TYPE (object_class),
 644                     GTK_SIGNAL_OFFSET (GtkTextViewClass, move_cursor),
 645                     _gtk_marshal_VOID__ENUM_INT_BOOLEAN,
 646                     GTK_TYPE_NONE, 3, GTK_TYPE_MOVEMENT_STEP, GTK_TYPE_INT, GTK_TYPE_BOOL);
 647
 648   signals[PAGE_HORIZONTALLY] =
 649     gtk_signal_new ("page_horizontally",
 650                     GTK_RUN_LAST | GTK_RUN_ACTION,
 651                     GTK_CLASS_TYPE (object_class),
 652                     GTK_SIGNAL_OFFSET (GtkTextViewClass, page_horizontally),
 653                     _gtk_marshal_VOID__INT_BOOLEAN,
 654                     GTK_TYPE_NONE, 2, GTK_TYPE_INT, GTK_TYPE_BOOL);
 655
 656   signals[SET_ANCHOR] =
 657     gtk_signal_new ("set_anchor",
 658                     GTK_RUN_LAST | GTK_RUN_ACTION,
 659                     GTK_CLASS_TYPE (object_class),
 660                     GTK_SIGNAL_OFFSET (GtkTextViewClass, set_anchor),
 661                     _gtk_marshal_VOID__VOID,
 662                     GTK_TYPE_NONE, 0);
 663
 664   signals[INSERT_AT_CURSOR] =
 665     gtk_signal_new ("insert_at_cursor",
 666                     GTK_RUN_LAST | GTK_RUN_ACTION,
 667                     GTK_CLASS_TYPE (object_class),
 668                     GTK_SIGNAL_OFFSET (GtkTextViewClass, insert_at_cursor),
 669                     _gtk_marshal_VOID__STRING,
 670                     GTK_TYPE_NONE, 1, GTK_TYPE_STRING);
 671
 672   signals[DELETE_FROM_CURSOR] =
 673     gtk_signal_new ("delete_from_cursor",
 674                     GTK_RUN_LAST | GTK_RUN_ACTION,
 675                     GTK_CLASS_TYPE (object_class),
 676                     GTK_SIGNAL_OFFSET (GtkTextViewClass, delete_from_cursor),
 677                     _gtk_marshal_VOID__ENUM_INT,
 678                     GTK_TYPE_NONE, 2, GTK_TYPE_DELETE_TYPE, GTK_TYPE_INT);
 679
 680   signals[CUT_CLIPBOARD] =
 681     gtk_signal_new ("cut_clipboard",
 682                     GTK_RUN_LAST | GTK_RUN_ACTION,
 683                     GTK_CLASS_TYPE (object_class),
 684                     GTK_SIGNAL_OFFSET (GtkTextViewClass, cut_clipboard),
 685                     _gtk_marshal_VOID__VOID,
 686                     GTK_TYPE_NONE, 0);
 687
 688   signals[COPY_CLIPBOARD] =
 689     gtk_signal_new ("copy_clipboard",
 690                     GTK_RUN_LAST | GTK_RUN_ACTION,
 691                     GTK_CLASS_TYPE (object_class),
 692                     GTK_SIGNAL_OFFSET (GtkTextViewClass, copy_clipboard),
 693                     _gtk_marshal_VOID__VOID,
 694                     GTK_TYPE_NONE, 0);
 695
 696   signals[PASTE_CLIPBOARD] =
 697     gtk_signal_new ("paste_clipboard",
 698                     GTK_RUN_LAST | GTK_RUN_ACTION,
 699                     GTK_CLASS_TYPE (object_class),
 700                     GTK_SIGNAL_OFFSET (GtkTextViewClass, paste_clipboard),
 701                     _gtk_marshal_VOID__VOID,
 702                     GTK_TYPE_NONE, 0);
 703
 704   signals[TOGGLE_OVERWRITE] =
 705     gtk_signal_new ("toggle_overwrite",
 706                     GTK_RUN_LAST | GTK_RUN_ACTION,
 707                     GTK_CLASS_TYPE (object_class),
 708                     GTK_SIGNAL_OFFSET (GtkTextViewClass, toggle_overwrite),
 709                     _gtk_marshal_VOID__VOID,
 710                     GTK_TYPE_NONE, 0);
 711
 712   signals[MOVE_FOCUS] =
 713     gtk_signal_new ("move_focus",
 714                     GTK_RUN_LAST | GTK_RUN_ACTION,
 715                     GTK_CLASS_TYPE (object_class),
 716                     GTK_SIGNAL_OFFSET (GtkTextViewClass, move_focus),
 717                     _gtk_marshal_VOID__ENUM,
 718                     GTK_TYPE_NONE, 1, GTK_TYPE_DIRECTION_TYPE);
 719
 720   signals[SET_SCROLL_ADJUSTMENTS] =
 721     gtk_signal_new ("set_scroll_adjustments",
 722                     GTK_RUN_LAST,
 723                     GTK_CLASS_TYPE (object_class),
 724                     GTK_SIGNAL_OFFSET (GtkTextViewClass, set_scroll_adjustments),
 725                     _gtk_marshal_VOID__OBJECT_OBJECT,
 726                     GTK_TYPE_NONE, 2, GTK_TYPE_ADJUSTMENT, GTK_TYPE_ADJUSTMENT);
 727   widget_class->set_scroll_adjustments_signal = signals[SET_SCROLL_ADJUSTMENTS];
 728
 729   signals[POPULATE_POPUP] =
 730     gtk_signal_new ("populate_popup",
 731                     GTK_RUN_LAST,
 732                     GTK_CLASS_TYPE (object_class),
 733                     GTK_SIGNAL_OFFSET (GtkTextViewClass, populate_popup),
 734                     _gtk_marshal_VOID__OBJECT,
 735                     GTK_TYPE_NONE, 1, GTK_TYPE_MENU);
 736
 737   /*
 738    * Key bindings
 739    */
 740
 741   binding_set = gtk_binding_set_by_class (klass);
 742
 743   /* Moving the insertion point */
 744   add_move_binding (binding_set, GDK_Right, 0,
 745                     GTK_MOVEMENT_VISUAL_POSITIONS, 1);
 746
 747   add_move_binding (binding_set, GDK_KP_Right, 0,
 748                     GTK_MOVEMENT_VISUAL_POSITIONS, 1);
 749
 750   add_move_binding (binding_set, GDK_Left, 0,
 751                     GTK_MOVEMENT_VISUAL_POSITIONS, -1);
 752
 753   add_move_binding (binding_set, GDK_KP_Left, 0,
 754                     GTK_MOVEMENT_VISUAL_POSITIONS, -1);
 755
 756   add_move_binding (binding_set, GDK_Right, GDK_CONTROL_MASK,
 757                     GTK_MOVEMENT_WORDS, 1);
 758
 759   add_move_binding (binding_set, GDK_KP_Right, GDK_CONTROL_MASK,
 760                     GTK_MOVEMENT_WORDS, 1);
 761
 762   add_move_binding (binding_set, GDK_Left, GDK_CONTROL_MASK,
 763                     GTK_MOVEMENT_WORDS, -1);
 764
 765   add_move_binding (binding_set, GDK_KP_Left, GDK_CONTROL_MASK,
 766                     GTK_MOVEMENT_WORDS, 1);
 767
 768   add_move_binding (binding_set, GDK_Up, 0,
 769                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 770
 771   add_move_binding (binding_set, GDK_KP_Up, 0,
 772                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 773
 774   add_move_binding (binding_set, GDK_Down, 0,
 775                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 776
 777   add_move_binding (binding_set, GDK_KP_Down, 0,
 778                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 779
 780   add_move_binding (binding_set, GDK_Up, GDK_CONTROL_MASK,
 781                     GTK_MOVEMENT_PARAGRAPHS, -1);
 782
 783   add_move_binding (binding_set, GDK_KP_Up, GDK_CONTROL_MASK,
 784                     GTK_MOVEMENT_PARAGRAPHS, -1);
 785
 786   add_move_binding (binding_set, GDK_Down, GDK_CONTROL_MASK,
 787                     GTK_MOVEMENT_PARAGRAPHS, 1);
 788
 789   add_move_binding (binding_set, GDK_KP_Down, GDK_CONTROL_MASK,
 790                     GTK_MOVEMENT_PARAGRAPHS, 1);
 791
 792   add_move_binding (binding_set, GDK_Home, 0,
 793                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
 794
 795   add_move_binding (binding_set, GDK_KP_Home, 0,
 796                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
 797
 798   add_move_binding (binding_set, GDK_End, 0,
 799                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
 800
 801   add_move_binding (binding_set, GDK_KP_End, 0,
 802                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
 803
 804   add_move_binding (binding_set, GDK_Home, GDK_CONTROL_MASK,
 805                     GTK_MOVEMENT_BUFFER_ENDS, -1);
 806
 807   add_move_binding (binding_set, GDK_KP_Home, GDK_CONTROL_MASK,
 808                     GTK_MOVEMENT_BUFFER_ENDS, -1);
 809
 810   add_move_binding (binding_set, GDK_End, GDK_CONTROL_MASK,
 811                     GTK_MOVEMENT_BUFFER_ENDS, 1);
 812
 813   add_move_binding (binding_set, GDK_KP_End, GDK_CONTROL_MASK,
 814                     GTK_MOVEMENT_BUFFER_ENDS, 1);
 815
 816   add_move_binding (binding_set, GDK_Page_Up, 0,
 817                     GTK_MOVEMENT_PAGES, -1);
 818
 819   add_move_binding (binding_set, GDK_KP_Page_Up, 0,
 820                     GTK_MOVEMENT_PAGES, -1);
 821
 822   add_move_binding (binding_set, GDK_Page_Down, 0,
 823                     GTK_MOVEMENT_PAGES, 1);
 824
 825   add_move_binding (binding_set, GDK_KP_Page_Down, 0,
 826                     GTK_MOVEMENT_PAGES, 1);
 827
 828   /* Select all
 829    */
 830   gtk_binding_entry_add_signal (binding_set, GDK_a, GDK_CONTROL_MASK,
 831                                 "move_cursor", 3,
 832                                 GTK_TYPE_MOVEMENT_STEP, GTK_MOVEMENT_BUFFER_ENDS,
 833                                 GTK_TYPE_INT, -1,
 834                                 GTK_TYPE_BOOL, FALSE);
 835   gtk_binding_entry_add_signal (binding_set, GDK_a, GDK_CONTROL_MASK,
 836                                 "move_cursor", 3,
 837                                 GTK_TYPE_MOVEMENT_STEP, GTK_MOVEMENT_BUFFER_ENDS,
 838                                 GTK_TYPE_INT, 1,
 839                                 GTK_TYPE_BOOL, TRUE);
 840
 841
 842   gtk_binding_entry_add_signal (binding_set, GDK_Page_Up, GDK_CONTROL_MASK,
 843                                 "page_horizontally", 2,
 844                                 GTK_TYPE_INT, -1,
 845                                 GTK_TYPE_BOOL, FALSE);
 846
 847   gtk_binding_entry_add_signal (binding_set, GDK_Page_Up, GDK_CONTROL_MASK | GDK_SHIFT_MASK,
 848                                 "page_horizontally", 2,
 849                                 GTK_TYPE_INT, -1,
 850                                 GTK_TYPE_BOOL, TRUE);
 851
 852   gtk_binding_entry_add_signal (binding_set, GDK_KP_Page_Up, GDK_CONTROL_MASK,
 853                                 "page_horizontally", 2,
 854                                 GTK_TYPE_INT, -1,
 855                                 GTK_TYPE_BOOL, FALSE);
 856
 857   gtk_binding_entry_add_signal (binding_set, GDK_KP_Page_Up, GDK_CONTROL_MASK | GDK_SHIFT_MASK,
 858                                 "page_horizontally", 2,
 859                                 GTK_TYPE_INT, -1,
 860                                 GTK_TYPE_BOOL, TRUE);
 861
 862   gtk_binding_entry_add_signal (binding_set, GDK_Page_Down, GDK_CONTROL_MASK,
 863                                 "page_horizontally", 2,
 864                                 GTK_TYPE_INT, 1,
 865                                 GTK_TYPE_BOOL, FALSE);
 866
 867   gtk_binding_entry_add_signal (binding_set, GDK_Page_Down, GDK_CONTROL_MASK | GDK_SHIFT_MASK,
 868                                 "page_horizontally", 2,
 869                                 GTK_TYPE_INT, 1,
 870                                 GTK_TYPE_BOOL, TRUE);
 871
 872   gtk_binding_entry_add_signal (binding_set, GDK_KP_Page_Down, GDK_CONTROL_MASK,
 873                                 "page_horizontally", 2,
 874                                 GTK_TYPE_INT, 1,
 875                                 GTK_TYPE_BOOL, FALSE);
 876
 877   gtk_binding_entry_add_signal (binding_set, GDK_KP_Page_Down, GDK_CONTROL_MASK | GDK_SHIFT_MASK,
 878                                 "page_horizontally", 2,
 879                                 GTK_TYPE_INT, 1,
 880                                 GTK_TYPE_BOOL, TRUE);
 881
 882   /* Deleting text */
 883   gtk_binding_entry_add_signal (binding_set, GDK_Delete, 0,
 884                                 "delete_from_cursor", 2,
 885                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 886                                 GTK_TYPE_INT, 1);
 887
 888   gtk_binding_entry_add_signal (binding_set, GDK_KP_Delete, 0,
 889                                 "delete_from_cursor", 2,
 890                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 891                                 GTK_TYPE_INT, 1);
 892
 893   gtk_binding_entry_add_signal (binding_set, GDK_BackSpace, 0,
 894                                 "delete_from_cursor", 2,
 895                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 896                                 GTK_TYPE_INT, -1);
 897
 898   gtk_binding_entry_add_signal (binding_set, GDK_Delete, GDK_CONTROL_MASK,
 899                                 "delete_from_cursor", 2,
 900                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 901                                 GTK_TYPE_INT, 1);
 902
 903   gtk_binding_entry_add_signal (binding_set, GDK_KP_Delete, GDK_CONTROL_MASK,
 904                                 "delete_from_cursor", 2,
 905                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 906                                 GTK_TYPE_INT, 1);
 907
 908   gtk_binding_entry_add_signal (binding_set, GDK_BackSpace, GDK_CONTROL_MASK,
 909                                 "delete_from_cursor", 2,
 910                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 911                                 GTK_TYPE_INT, -1);
 912
 913   /* Cut/copy/paste */
 914
 915   gtk_binding_entry_add_signal (binding_set, GDK_x, GDK_CONTROL_MASK,
 916                                 "cut_clipboard", 0);
 917
 918   gtk_binding_entry_add_signal (binding_set, GDK_c, GDK_CONTROL_MASK,
 919                                 "copy_clipboard", 0);
 920
 921   gtk_binding_entry_add_signal (binding_set, GDK_v, GDK_CONTROL_MASK,
 922                                 "paste_clipboard", 0);
 923
 924   /* Overwrite */
 925   gtk_binding_entry_add_signal (binding_set, GDK_Insert, 0,
 926                                 "toggle_overwrite", 0);
 927   gtk_binding_entry_add_signal (binding_set, GDK_KP_Insert, 0,
 928                                 "toggle_overwrite", 0);
 929
 930   /* Control-tab focus motion */
 931   gtk_binding_entry_add_signal (binding_set, GDK_Tab, GDK_CONTROL_MASK,
 932                                 "move_focus", 1,
 933                                 GTK_TYPE_DIRECTION_TYPE, GTK_DIR_TAB_FORWARD);
 934   gtk_binding_entry_add_signal (binding_set, GDK_KP_Tab, GDK_CONTROL_MASK,
 935                                 "move_focus", 1,
 936                                 GTK_TYPE_DIRECTION_TYPE, GTK_DIR_TAB_FORWARD);
 937
 938   gtk_binding_entry_add_signal (binding_set, GDK_Tab, GDK_SHIFT_MASK | GDK_CONTROL_MASK,
 939                                 "move_focus", 1,
 940                                 GTK_TYPE_DIRECTION_TYPE, GTK_DIR_TAB_BACKWARD);
 941   gtk_binding_entry_add_signal (binding_set, GDK_KP_Tab, GDK_SHIFT_MASK | GDK_CONTROL_MASK,
 942                                 "move_focus", 1,
 943                                 GTK_TYPE_DIRECTION_TYPE, GTK_DIR_TAB_BACKWARD);
 944 }
 945
 946 static void
 947 gtk_text_view_init (GtkTextView *text_view)
 948 {
 949   GtkWidget *widget;
 950
 951   widget = GTK_WIDGET (text_view);
 952
 953   GTK_WIDGET_SET_FLAGS (widget, GTK_CAN_FOCUS);
 954
 955   /* Set up default style */
 956   text_view->wrap_mode = GTK_WRAP_NONE;
 957   text_view->pixels_above_lines = 0;
 958   text_view->pixels_below_lines = 0;
 959   text_view->pixels_inside_wrap = 0;
 960   text_view->justify = GTK_JUSTIFY_LEFT;
 961   text_view->left_margin = 0;
 962   text_view->right_margin = 0;
 963   text_view->indent = 0;
 964   text_view->tabs = NULL;
 965   text_view->editable = TRUE;
 966
 967   gtk_drag_dest_set (widget,
 968                      0,
 969                      target_table, G_N_ELEMENTS (target_table),
 970                      GDK_ACTION_COPY | GDK_ACTION_MOVE);
 971
 972   text_view->virtual_cursor_x = -1;
 973   text_view->virtual_cursor_y = -1;
 974
 975   /* This object is completely private. No external entity can gain a reference
 976    * to it; so we create it here and destroy it in finalize ().
 977    */
 978   text_view->im_context = gtk_im_multicontext_new ();
 979
 980   g_signal_connect (G_OBJECT (text_view->im_context), "commit",
 981                     G_CALLBACK (gtk_text_view_commit_handler), text_view);
 982   g_signal_connect (G_OBJECT (text_view->im_context), "preedit_changed",
 983                     G_CALLBACK (gtk_text_view_preedit_changed_handler), text_view);
 984   g_signal_connect (G_OBJECT (text_view->im_context), "retrieve_surrounding",
 985                     G_CALLBACK (gtk_text_view_retrieve_surrounding_handler), text_view);
 986   g_signal_connect (G_OBJECT (text_view->im_context), "delete_surrounding",
 987                     G_CALLBACK (gtk_text_view_delete_surrounding_handler), text_view);
 988
 989   text_view->cursor_visible = TRUE;
 990
 991   text_view->text_window = text_window_new (GTK_TEXT_WINDOW_TEXT,
 992                                             widget, 200, 200);
 993
 994   text_view->drag_start_x = -1;
 995   text_view->drag_start_y = -1;
 996
 997   text_view->pending_place_cursor_button = 0;
 998
 999   /* We handle all our own redrawing */
1000   gtk_widget_set_redraw_on_allocate (widget, FALSE);
1001 }
1002
1003 /**
1004  * gtk_text_view_new:
1005  *
1006  * Creates a new #GtkTextView. If you don't call gtk_text_view_set_buffer()
1007  * before using the text view, an empty default buffer will be created
1008  * for you. Get the buffer with gtk_text_view_get_buffer(). If you want
1009  * to specify your own buffer, consider gtk_text_view_new_with_buffer().
1010  *
1011  * Return value: a new #GtkTextView
1012  **/
1013 GtkWidget*
1014 gtk_text_view_new (void)
1015 {
1016   return GTK_WIDGET (gtk_type_new (gtk_text_view_get_type ()));
1017 }
1018
1019 /**
1020  * gtk_text_view_new_with_buffer:
1021  * @buffer: a #GtkTextBuffer
1022  *
1023  * Creates a new #GtkTextView widget displaying the buffer
1024  * @buffer. One buffer can be shared among many widgets.
1025  * @buffer may be NULL to create a default buffer, in which case
1026  * this function is equivalent to gtk_text_view_new(). The
1027  * text view adds its own reference count to the buffer; it does not
1028  * take over an existing reference.
1029  *
1030  * Return value: a new #GtkTextView.
1031  **/
1032 GtkWidget*
1033 gtk_text_view_new_with_buffer (GtkTextBuffer *buffer)
1034 {
1035   GtkTextView *text_view;
1036
1037   text_view = (GtkTextView*)gtk_text_view_new ();
1038
1039   gtk_text_view_set_buffer (text_view, buffer);
1040
1041   return GTK_WIDGET (text_view);
1042 }
1043
1044 /**
1045  * gtk_text_view_set_buffer:
1046  * @text_view: a #GtkTextView
1047  * @buffer: a #GtkTextBuffer
1048  *
1049  * Sets @buffer as the buffer being displayed by @text_view. The previous
1050  * buffer displayed by the text view is unreferenced, and a reference is
1051  * added to @buffer. If you owned a reference to @buffer before passing it
1052  * to this function, you must remove that reference yourself; #GtkTextView
1053  * will not "adopt" it.
1054  *
1055  **/
1056 void
1057 gtk_text_view_set_buffer (GtkTextView   *text_view,
1058                           GtkTextBuffer *buffer)
1059 {
1060   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1061   g_return_if_fail (buffer == NULL || GTK_IS_TEXT_BUFFER (buffer));
1062
1063   if (text_view->buffer == buffer)
1064     return;
1065
1066   if (text_view->buffer != NULL)
1067     {
1068       /* Destroy all anchored children */
1069       GSList *tmp_list;
1070       GSList *copy;
1071
1072       copy = g_slist_copy (text_view->children);
1073       tmp_list = copy;
1074       while (tmp_list != NULL)
1075         {
1076           GtkTextViewChild *vc = tmp_list->data;
1077
1078           if (vc->anchor)
1079             {
1080               gtk_widget_destroy (vc->widget);
1081               /* vc may now be invalid! */
1082             }
1083
1084           tmp_list = g_slist_next (tmp_list);
1085         }
1086
1087       g_slist_free (copy);
1088
1089       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->buffer),
1090                                             gtk_text_view_mark_set_handler, text_view);
1091       g_object_unref (G_OBJECT (text_view->buffer));
1092       text_view->dnd_mark = NULL;
1093
1094       if (GTK_WIDGET_REALIZED (text_view))
1095         gtk_text_buffer_remove_selection_clipboard (text_view->buffer,
1096                                                     gtk_clipboard_get (GDK_SELECTION_PRIMARY));
1097     }
1098
1099   text_view->buffer = buffer;
1100
1101   if (buffer != NULL)
1102     {
1103       GtkTextIter start;
1104
1105       g_object_ref (G_OBJECT (buffer));
1106
1107       if (text_view->layout)
1108         gtk_text_layout_set_buffer (text_view->layout, buffer);
1109
1110       gtk_text_buffer_get_iter_at_offset (text_view->buffer, &start, 0);
1111
1112       text_view->dnd_mark = gtk_text_buffer_create_mark (text_view->buffer,
1113                                                          "gtk_drag_target",
1114                                                          &start, FALSE);
1115
1116       text_view->first_para_mark = gtk_text_buffer_create_mark (text_view->buffer,
1117                                                                 NULL,
1118                                                                 &start, TRUE);
1119
1120       text_view->first_para_pixels = 0;
1121
1122       g_signal_connect (G_OBJECT (text_view->buffer), "mark_set",
1123                         G_CALLBACK (gtk_text_view_mark_set_handler), text_view);
1124
1125       if (GTK_WIDGET_REALIZED (text_view))
1126         gtk_text_buffer_add_selection_clipboard (text_view->buffer,
1127                                                  gtk_clipboard_get (GDK_SELECTION_PRIMARY));
1128     }
1129
1130   if (GTK_WIDGET_VISIBLE (text_view))
1131     gtk_widget_queue_draw (GTK_WIDGET (text_view));
1132
1133   DV(g_print ("Invalidating due to set_buffer\n"));
1134   gtk_text_view_invalidate (text_view);
1135 }
1136
1137 static GtkTextBuffer*
1138 get_buffer (GtkTextView *text_view)
1139 {
1140   if (text_view->buffer == NULL)
1141     {
1142       GtkTextBuffer *b;
1143       b = gtk_text_buffer_new (NULL);
1144       gtk_text_view_set_buffer (text_view, b);
1145       g_object_unref (G_OBJECT (b));
1146     }
1147
1148   return text_view->buffer;
1149 }
1150
1151 /**
1152  * gtk_text_view_get_buffer:
1153  * @text_view: a #GtkTextView
1154  *
1155  * Returns the #GtkTextBuffer being displayed by this text view.
1156  * The reference count on the buffer is not incremented; the caller
1157  * of this function won't own a new reference.
1158  *
1159  * Return value: a #GtkTextBuffer
1160  **/
1161 GtkTextBuffer*
1162 gtk_text_view_get_buffer (GtkTextView *text_view)
1163 {
1164   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
1165
1166   return get_buffer (text_view);
1167 }
1168
1169 /**
1170  * gtk_text_view_get_iter_at_location:
1171  * @text_view: a #GtkTextView
1172  * @iter: a #GtkTextIter
1173  * @x: x position, in buffer coordinates
1174  * @y: y position, in buffer coordinates
1175  *
1176  * Retrieves the iterator at buffer coordinates @x and @y. Buffer
1177  * coordinates are coordinates for the entire buffer, not just the
1178  * currently-displayed portion.  If you have coordinates from an
1179  * event, you have to convert those to buffer coordinates with
1180  * gtk_text_view_window_to_buffer_coords().
1181  *
1182  **/
1183 void
1184 gtk_text_view_get_iter_at_location (GtkTextView *text_view,
1185                                     GtkTextIter *iter,
1186                                     gint         x,
1187                                     gint         y)
1188 {
1189   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1190   g_return_if_fail (iter != NULL);
1191   g_return_if_fail (text_view->layout != NULL);
1192
1193   gtk_text_layout_get_iter_at_pixel (text_view->layout,
1194                                      iter,
1195                                      x,
1196                                      y);
1197 }
1198
1199 /**
1200  * gtk_text_view_get_iter_location:
1201  * @text_view: a #GtkTextView
1202  * @iter: a #GtkTextIter
1203  * @location: bounds of the character at @iter
1204  *
1205  * Gets a rectangle which roughly contains the character at @iter.
1206  * The rectangle position is in buffer coordinates; use
1207  * gtk_text_view_buffer_to_window_coords() to convert these
1208  * coordinates to coordinates for one of the windows in the text view.
1209  *
1210  **/
1211 void
1212 gtk_text_view_get_iter_location (GtkTextView       *text_view,
1213                                  const GtkTextIter *iter,
1214                                  GdkRectangle      *location)
1215 {
1216   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1217   g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
1218
1219   gtk_text_layout_get_iter_location (text_view->layout, iter, location);
1220 }
1221
1222 /**
1223  * gtk_text_view_get_line_yrange:
1224  * @text_view: a #GtkTextView
1225  * @iter: a #GtkTextIter
1226  * @y: return location for a y coordinate
1227  * @height: return location for a height
1228  *
1229  * Gets the y coordinate of the top of the line containing @iter,
1230  * and the height of the line. The coordinate is a buffer coordinate;
1231  * convert to window coordinates with gtk_text_view_buffer_to_window_coords().
1232  *
1233  **/
1234 void
1235 gtk_text_view_get_line_yrange (GtkTextView       *text_view,
1236                                const GtkTextIter *iter,
1237                                gint              *y,
1238                                gint              *height)
1239 {
1240   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1241   g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
1242
1243   gtk_text_layout_get_line_yrange (text_view->layout,
1244                                    iter,
1245                                    y,
1246                                    height);
1247 }
1248
1249 /**
1250  * gtk_text_view_get_line_at_y:
1251  * @text_view: a #GtkTextView
1252  * @target_iter: a #GtkTextIter
1253  * @y: a y coordinate
1254  * @line_top: return location for top coordinate of the line
1255  *
1256  * Gets the #GtkTextIter at the start of the line containing
1257  * the coordinate @y. @y is in buffer coordinates, convert from
1258  * window coordinates with gtk_text_view_window_to_buffer_coords().
1259  * If non-%NULL, @line_top will be filled with the coordinate of the top
1260  * edge of the line.
1261  **/
1262 void
1263 gtk_text_view_get_line_at_y (GtkTextView *text_view,
1264                              GtkTextIter *target_iter,
1265                              gint         y,
1266                              gint        *line_top)
1267 {
1268   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1269
1270   gtk_text_layout_get_line_at_y (text_view->layout,
1271                                  target_iter,
1272                                  y,
1273                                  line_top);
1274 }
1275
1276 static gboolean
1277 set_adjustment_clamped (GtkAdjustment *adj, gdouble val)
1278 {
1279   DV (g_print ("  Setting adj to raw value %g\n", val));
1280
1281   /* We don't really want to clamp to upper; we want to clamp to
1282      upper - page_size which is the highest value the scrollbar
1283      will let us reach. */
1284   if (val > (adj->upper - adj->page_size))
1285     val = adj->upper - adj->page_size;
1286
1287   if (val < adj->lower)
1288     val = adj->lower;
1289
1290   if (val != adj->value)
1291     {
1292       DV (g_print ("  Setting adj to clamped value %g\n", val));
1293       gtk_adjustment_set_value (adj, val);
1294       return TRUE;
1295     }
1296   else
1297     return FALSE;
1298 }
1299
1300 /**
1301  * gtk_text_view_scroll_to_iter:
1302  * @text_view: a #GtkTextView
1303  * @iter: a #GtkTextIter
1304  * @within_margin: margin as a [0.0,0.5) fraction of screen size
1305  * @use_align: whether to use alignment arguments (if %FALSE, just get the mark onscreen)
1306  * @xalign: horizontal alignment of mark within visible area.
1307  * @yalign: vertical alignment of mark within visible area
1308  *
1309  * Scrolls @text_view so that @iter is on the screen in the position
1310  * indicated by @xalign and @yalign. An alignment of 0.0 indicates
1311  * left or top, 1.0 indicates right or bottom, 0.5 means center. If @use_align
1312  * is %FALSE, the text scrolls the minimal distance to get the mark onscreen,
1313  * possibly not scrolling at all. The effective screen for purposes
1314  * of this function is reduced by a margin of size @within_margin.
1315  * NOTE: This function uses the currently-computed height of the
1316  * lines in the text buffer. Note that line heights are computed
1317  * in an idle handler; so this function may not have the desired effect
1318  * if it's called before the height computations. To avoid oddness,
1319  * consider using gtk_text_view_scroll_to_mark() which saves a point
1320  * to be scrolled to after line validation.
1321  *
1322  * Return value: %TRUE if scrolling occurred
1323  **/
1324 gboolean
1325 gtk_text_view_scroll_to_iter (GtkTextView   *text_view,
1326                               GtkTextIter   *iter,
1327                               gdouble        within_margin,
1328                               gboolean       use_align,
1329                               gdouble        xalign,
1330                               gdouble        yalign)
1331 {
1332   GdkRectangle rect;
1333   GdkRectangle screen;
1334   gint screen_bottom;
1335   gint screen_right;
1336   gint scroll_dest;
1337   GtkWidget *widget;
1338   gboolean retval = FALSE;
1339   gint scroll_inc;
1340   gint screen_xoffset, screen_yoffset;
1341   gint current_x_scroll, current_y_scroll;
1342
1343   /* FIXME why don't we do the validate-at-scroll-destination thing
1344    * from flush_scroll in this function? I think it wasn't done before
1345    * because changed_handler was screwed up, but I could be wrong.
1346    */
1347
1348   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1349   g_return_val_if_fail (iter != NULL, FALSE);
1350   g_return_val_if_fail (within_margin >= 0.0 && within_margin < 0.5, FALSE);
1351   g_return_val_if_fail (xalign >= 0.0 && xalign <= 1.0, FALSE);
1352   g_return_val_if_fail (yalign >= 0.0 && yalign <= 1.0, FALSE);
1353
1354   widget = GTK_WIDGET (text_view);
1355
1356   DV(g_print(G_STRLOC"\n"));
1357
1358   gtk_text_layout_get_iter_location (text_view->layout,
1359                                      iter,
1360                                      &rect);
1361
1362   DV (g_print (" target rect %d,%d  %d x %d\n", rect.x, rect.y, rect.width, rect.height));
1363
1364   current_x_scroll = text_view->xoffset;
1365   current_y_scroll = text_view->yoffset;
1366
1367   screen.x = current_x_scroll;
1368   screen.y = current_y_scroll;
1369   screen.width = SCREEN_WIDTH (widget);
1370   screen.height = SCREEN_HEIGHT (widget);
1371
1372   screen_xoffset = screen.width * within_margin;
1373   screen_yoffset = screen.height * within_margin;
1374
1375   screen.x += screen_xoffset;
1376   screen.y += screen_yoffset;
1377   screen.width -= screen_xoffset * 2;
1378   screen.height -= screen_yoffset * 2;
1379
1380   /* paranoia check */
1381   if (screen.width < 1)
1382     screen.width = 1;
1383   if (screen.height < 1)
1384     screen.height = 1;
1385
1386   screen_right = screen.x + screen.width;
1387   screen_bottom = screen.y + screen.height;
1388
1389   /* The alignment affects the point in the target character that we
1390    * choose to align. If we're doing right/bottom alignment, we align
1391    * the right/bottom edge of the character the mark is at; if we're
1392    * doing left/top we align the left/top edge of the character; if
1393    * we're doing center alignment we align the center of the
1394    * character.
1395    */
1396
1397   /* Vertical scroll */
1398
1399   scroll_inc = 0;
1400   scroll_dest = current_y_scroll;
1401
1402   if (use_align)
1403     {
1404       scroll_dest = rect.y + (rect.height * yalign) - (screen.height * yalign);
1405
1406       /* if scroll_dest < screen.y, we move a negative increment (up),
1407        * else a positive increment (down)
1408        */
1409       scroll_inc = scroll_dest - screen.y + screen_yoffset;
1410     }
1411   else
1412     {
1413       /* move minimum to get onscreen */
1414       if (rect.y < screen.y)
1415         {
1416           scroll_dest = rect.y;
1417           scroll_inc = scroll_dest - screen.y - screen_yoffset;
1418         }
1419       else if ((rect.y + rect.height) > screen_bottom)
1420         {
1421           scroll_dest = rect.y + rect.height;
1422           scroll_inc = scroll_dest - screen_bottom + screen_yoffset;
1423         }
1424     }
1425
1426   if (scroll_inc != 0)
1427     {
1428       retval = set_adjustment_clamped (get_vadjustment (text_view),
1429                                        current_y_scroll + scroll_inc);
1430
1431       DV (g_print (" vert increment %d\n", scroll_inc));
1432     }
1433
1434   /* Horizontal scroll */
1435
1436   scroll_inc = 0;
1437   scroll_dest = current_x_scroll;
1438
1439   if (use_align)
1440     {
1441       scroll_dest = rect.x + (rect.width * xalign) - (screen.width * xalign);
1442
1443       /* if scroll_dest < screen.y, we move a negative increment (left),
1444        * else a positive increment (right)
1445        */
1446       scroll_inc = scroll_dest - screen.x + screen_xoffset;
1447     }
1448   else
1449     {
1450       /* move minimum to get onscreen */
1451       if (rect.x < screen.x)
1452         {
1453           scroll_dest = rect.x;
1454           scroll_inc = scroll_dest - screen.x - screen_xoffset;
1455         }
1456       else if ((rect.x + rect.width) > screen_right)
1457         {
1458           scroll_dest = rect.x + rect.width;
1459           scroll_inc = scroll_dest - screen_right + screen_xoffset;
1460         }
1461     }
1462
1463   if (scroll_inc != 0)
1464     {
1465       retval = set_adjustment_clamped (get_hadjustment (text_view),
1466                                        current_x_scroll + scroll_inc);
1467
1468       DV (g_print (" horiz increment %d\n", scroll_inc));
1469     }
1470
1471   if (retval)
1472     DV(g_print (">Actually scrolled ("G_STRLOC")\n"));
1473   else
1474     DV(g_print (">Didn't end up scrolling ("G_STRLOC")\n"));
1475
1476   return retval;
1477 }
1478
1479 static void
1480 free_pending_scroll (GtkTextPendingScroll *scroll)
1481 {
1482   if (!gtk_text_mark_get_deleted (scroll->mark))
1483     gtk_text_buffer_delete_mark (gtk_text_mark_get_buffer (scroll->mark),
1484                                  scroll->mark);
1485   g_object_unref (G_OBJECT (scroll->mark));
1486   g_free (scroll);
1487 }
1488
1489 static void
1490 gtk_text_view_queue_scroll (GtkTextView   *text_view,
1491                             GtkTextMark   *mark,
1492                             gdouble        within_margin,
1493                             gboolean       use_align,
1494                             gdouble        xalign,
1495                             gdouble        yalign)
1496 {
1497   GtkTextIter iter;
1498   GtkTextPendingScroll *scroll;
1499
1500   DV(g_print(G_STRLOC"\n"));
1501
1502   scroll = g_new (GtkTextPendingScroll, 1);
1503
1504   scroll->within_margin = within_margin;
1505   scroll->use_align = use_align;
1506   scroll->xalign = xalign;
1507   scroll->yalign = yalign;
1508
1509   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
1510
1511   scroll->mark = gtk_text_buffer_create_mark (get_buffer (text_view),
1512                                               NULL,
1513                                               &iter,
1514                                               gtk_text_mark_get_left_gravity (mark));
1515
1516   g_object_ref (G_OBJECT (scroll->mark));
1517
1518   if (text_view->pending_scroll)
1519     free_pending_scroll (text_view->pending_scroll);
1520
1521   text_view->pending_scroll = scroll;
1522 }
1523
1524 static gboolean
1525 gtk_text_view_flush_scroll (GtkTextView *text_view)
1526 {
1527   GtkTextIter iter;
1528   GtkTextPendingScroll *scroll;
1529   gboolean retval;
1530   GtkWidget *widget;
1531
1532   widget = GTK_WIDGET (text_view);
1533
1534   DV(g_print(G_STRLOC"\n"));
1535
1536   if (text_view->pending_scroll == NULL)
1537     {
1538       DV (g_print ("in flush scroll, no pending scroll\n"));
1539       return FALSE;
1540     }
1541
1542   scroll = text_view->pending_scroll;
1543
1544   /* avoid recursion */
1545   text_view->pending_scroll = NULL;
1546
1547   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, scroll->mark);
1548
1549   /* Validate area around the scroll destination, so the adjustment
1550    * can meaningfully point into that area. We must validate
1551    * enough area to be sure that after we scroll, everything onscreen
1552    * is valid; otherwise, validation will maintain the first para
1553    * in one place, but may push the target iter off the bottom of
1554    * the screen.
1555    */
1556   DV(g_print (">Validating scroll destination ("G_STRLOC")\n"));
1557   gtk_text_layout_validate_yrange (text_view->layout, &iter,
1558                                    - (widget->allocation.height * 2),
1559                                    widget->allocation.height * 2);
1560
1561   DV(g_print (">Done validating scroll destination ("G_STRLOC")\n"));
1562
1563   /* Ensure we have updated width/height */
1564   gtk_text_view_update_adjustments (text_view);
1565
1566   retval = gtk_text_view_scroll_to_iter (text_view,
1567                                          &iter,
1568                                          scroll->within_margin,
1569                                          scroll->use_align,
1570                                          scroll->xalign,
1571                                          scroll->yalign);
1572
1573   free_pending_scroll (scroll);
1574
1575   return retval;
1576 }
1577
1578 static void
1579 gtk_text_view_set_adjustment_upper (GtkAdjustment *adj, gdouble upper)
1580 {
1581   if (upper != adj->upper)
1582     {
1583       gdouble min = MAX (0.0, upper - adj->page_size);
1584       gboolean value_changed = FALSE;
1585
1586       adj->upper = upper;
1587
1588       if (adj->value > min)
1589         {
1590           adj->value = min;
1591           value_changed = TRUE;
1592         }
1593
1594       gtk_signal_emit_by_name (GTK_OBJECT (adj), "changed");
1595       DV(g_print(">Changed adj upper to %g ("G_STRLOC")\n", upper));
1596
1597       if (value_changed)
1598         {
1599           DV(g_print(">Changed adj value because upper decreased ("G_STRLOC")\n"));
1600           gtk_signal_emit_by_name (GTK_OBJECT (adj), "value_changed");
1601         }
1602     }
1603 }
1604
1605 static void
1606 gtk_text_view_update_adjustments (GtkTextView *text_view)
1607 {
1608   gint width = 0, height = 0;
1609
1610   DV(g_print(">Updating adjustments ("G_STRLOC")\n"));
1611
1612   if (text_view->layout)
1613     gtk_text_layout_get_size (text_view->layout, &width, &height);
1614
1615   if (text_view->width != width || text_view->height != height)
1616     {
1617       text_view->width = width;
1618       text_view->height = height;
1619
1620       gtk_text_view_set_adjustment_upper (get_hadjustment (text_view),
1621                                           MAX (SCREEN_WIDTH (text_view), width));
1622       gtk_text_view_set_adjustment_upper (get_vadjustment (text_view),
1623                                           MAX (SCREEN_HEIGHT (text_view), height));
1624
1625       /* hadj/vadj exist since we called get_hadjustment/get_vadjustment above */
1626
1627       /* Set up the step sizes; we'll say that a page is
1628          our allocation minus one step, and a step is
1629          1/10 of our allocation. */
1630       text_view->hadjustment->step_increment =
1631         SCREEN_WIDTH (text_view) / 10.0;
1632       text_view->hadjustment->page_increment =
1633         SCREEN_WIDTH (text_view) * 0.9;
1634
1635       text_view->vadjustment->step_increment =
1636         SCREEN_HEIGHT (text_view) / 10.0;
1637       text_view->vadjustment->page_increment =
1638         SCREEN_HEIGHT (text_view) * 0.9;
1639
1640       gtk_signal_emit_by_name (GTK_OBJECT (get_hadjustment (text_view)), "changed");
1641       gtk_signal_emit_by_name (GTK_OBJECT (get_hadjustment (text_view)), "changed");
1642     }
1643 }
1644
1645 static void
1646 gtk_text_view_update_layout_width (GtkTextView *text_view)
1647 {
1648   DV(g_print(">Updating layout width ("G_STRLOC")\n"));
1649
1650   gtk_text_view_ensure_layout (text_view);
1651
1652   gtk_text_layout_set_screen_width (text_view->layout,
1653                                     SCREEN_WIDTH (text_view));
1654 }
1655
1656 static void
1657 gtk_text_view_update_im_spot_location (GtkTextView *text_view)
1658 {
1659   GdkRectangle area;
1660   gint cursor_x_pos, cursor_y_pos;
1661
1662   if (text_view->layout == NULL)
1663     return;
1664
1665   gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, &cursor_y_pos);
1666
1667   area.x = cursor_x_pos;
1668   area.y = cursor_y_pos;
1669   area.width = area.height = 0;
1670
1671   gtk_im_context_set_cursor_location (text_view->im_context, &area);
1672 }
1673
1674 /**
1675  * gtk_text_view_scroll_to_mark:
1676  * @text_view: a #GtkTextView
1677  * @mark: a #GtkTextMark
1678  * @within_margin: margin as a [0.0,0.5) fraction of screen size
1679  * @use_align: whether to use alignment arguments (if %FALSE, just get the mark onscreen)
1680  * @xalign: horizontal alignment of mark within visible area.
1681  * @yalign: vertical alignment of mark within visible area
1682  *
1683  * Scrolls @text_view so that @mark is on the screen in the position
1684  * indicated by @xalign and @yalign. An alignment of 0.0 indicates
1685  * left or top, 1.0 indicates right or bottom, 0.5 means center. If @use_align
1686  * is %FALSE, the text scrolls the minimal distance to get the mark onscreen,
1687  * possibly not scrolling at all. The effective screen for purposes
1688  * of this function is reduced by a margin of size @within_margin.
1689  *
1690  **/
1691 void
1692 gtk_text_view_scroll_to_mark (GtkTextView *text_view,
1693                               GtkTextMark *mark,
1694                               gdouble      within_margin,
1695                               gboolean     use_align,
1696                               gdouble      xalign,
1697                               gdouble      yalign)
1698 {
1699   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1700   g_return_if_fail (GTK_IS_TEXT_MARK (mark));
1701   g_return_if_fail (within_margin >= 0.0 && within_margin < 0.5);
1702   g_return_if_fail (xalign >= 0.0 && xalign <= 1.0);
1703   g_return_if_fail (yalign >= 0.0 && yalign <= 1.0);
1704
1705   gtk_text_view_queue_scroll (text_view, mark,
1706                               within_margin,
1707                               use_align,
1708                               xalign,
1709                               yalign);
1710
1711   /* If no validation is pending, we need to go ahead and force an
1712    * immediate scroll.
1713    */
1714   if (text_view->layout &&
1715       gtk_text_layout_is_valid (text_view->layout))
1716     gtk_text_view_flush_scroll (text_view);
1717 }
1718
1719 /**
1720  * gtk_text_view_scroll_mark_onscreen:
1721  * @text_view: a #GtkTextView
1722  * @mark: a mark in the buffer for @text_view
1723  *
1724  * Scrolls @text_view the minimum distance such that @mark is contained
1725  * within the visible area of the widget.
1726  *
1727  **/
1728 void
1729 gtk_text_view_scroll_mark_onscreen (GtkTextView *text_view,
1730                                     GtkTextMark *mark)
1731 {
1732   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1733   g_return_if_fail (GTK_IS_TEXT_MARK (mark));
1734
1735   gtk_text_view_scroll_to_mark (text_view, mark, 0.0, FALSE, 0.0, 0.0);
1736 }
1737
1738 static gboolean
1739 clamp_iter_onscreen (GtkTextView *text_view, GtkTextIter *iter)
1740 {
1741   GdkRectangle visible_rect;
1742   gtk_text_view_get_visible_rect (text_view, &visible_rect);
1743
1744   return gtk_text_layout_clamp_iter_to_vrange (text_view->layout, iter,
1745                                                visible_rect.y,
1746                                                visible_rect.y + visible_rect.height);
1747 }
1748
1749 /**
1750  * gtk_text_view_move_mark_onscreen:
1751  * @text_view: a #GtkTextView
1752  * @mark: a #GtkTextMark
1753  *
1754  * Moves a mark within the buffer so that it's
1755  * located within the currently-visible text area.
1756  *
1757  * Return value: %TRUE if the mark moved (wasn't already onscreen)
1758  **/
1759 gboolean
1760 gtk_text_view_move_mark_onscreen (GtkTextView *text_view,
1761                                   GtkTextMark *mark)
1762 {
1763   GtkTextIter iter;
1764
1765   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1766   g_return_val_if_fail (mark != NULL, FALSE);
1767
1768   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
1769
1770   if (clamp_iter_onscreen (text_view, &iter))
1771     {
1772       gtk_text_buffer_move_mark (get_buffer (text_view), mark, &iter);
1773       return TRUE;
1774     }
1775   else
1776     return FALSE;
1777 }
1778
1779 /**
1780  * gtk_text_view_get_visible_rect:
1781  * @text_view: a #GtkTextView
1782  * @visible_rect: rectangle to fill
1783  *
1784  * Fills @visible_rect with the currently-visible
1785  * region of the buffer, in buffer coordinates. Convert to window coordinates
1786  * with gtk_text_view_buffer_to_window_coords().
1787  **/
1788 void
1789 gtk_text_view_get_visible_rect (GtkTextView  *text_view,
1790                                 GdkRectangle *visible_rect)
1791 {
1792   GtkWidget *widget;
1793
1794   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1795
1796   widget = GTK_WIDGET (text_view);
1797
1798   if (visible_rect)
1799     {
1800       visible_rect->x = text_view->xoffset;
1801       visible_rect->y = text_view->yoffset;
1802       visible_rect->width = SCREEN_WIDTH (widget);
1803       visible_rect->height = SCREEN_HEIGHT (widget);
1804
1805       DV(g_print(" visible rect: %d,%d %d x %d\n",
1806                  visible_rect->x,
1807                  visible_rect->y,
1808                  visible_rect->width,
1809                  visible_rect->height));
1810     }
1811 }
1812
1813 /**
1814  * gtk_text_view_set_wrap_mode:
1815  * @text_view: a #GtkTextView
1816  * @wrap_mode: a #GtkWrapMode
1817  *
1818  * Sets the line wrapping for the view.
1819  **/
1820 void
1821 gtk_text_view_set_wrap_mode (GtkTextView *text_view,
1822                              GtkWrapMode  wrap_mode)
1823 {
1824   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1825
1826   if (text_view->wrap_mode != wrap_mode)
1827     {
1828       text_view->wrap_mode = wrap_mode;
1829
1830       if (text_view->layout)
1831         {
1832           text_view->layout->default_style->wrap_mode = wrap_mode;
1833           gtk_text_layout_default_style_changed (text_view->layout);
1834         }
1835     }
1836
1837   g_object_notify (G_OBJECT (text_view), "wrap_mode");
1838 }
1839
1840 /**
1841  * gtk_text_view_get_wrap_mode:
1842  * @text_view: a #GtkTextView
1843  *
1844  * Gets the line wrapping for the view.
1845  *
1846  * Return value: the line wrap setting
1847  **/
1848 GtkWrapMode
1849 gtk_text_view_get_wrap_mode (GtkTextView *text_view)
1850 {
1851   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_WRAP_NONE);
1852
1853   return text_view->wrap_mode;
1854 }
1855
1856 /**
1857  * gtk_text_view_set_editable:
1858  * @text_view: a #GtkTextView
1859  * @setting: whether it's editable
1860  *
1861  * Sets the default editability of the #GtkTextView. You can override
1862  * this default setting with tags in the buffer, using the "editable"
1863  * attribute of tags.
1864  **/
1865 void
1866 gtk_text_view_set_editable (GtkTextView *text_view,
1867                             gboolean     setting)
1868 {
1869   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1870   setting = setting != FALSE;
1871
1872   if (text_view->editable != setting)
1873     {
1874       text_view->editable = setting;
1875
1876       if (text_view->layout)
1877         {
1878           text_view->layout->default_style->editable = text_view->editable;
1879           gtk_text_layout_default_style_changed (text_view->layout);
1880         }
1881
1882       g_object_notify (G_OBJECT (text_view), "editable");
1883     }
1884 }
1885
1886 /**
1887  * gtk_text_view_get_editable:
1888  * @text_view: a #GtkTextView
1889  *
1890  * Returns the default editability of the #GtkTextView. Tags in the
1891  * buffer may override this setting for some ranges of text.
1892  *
1893  * Return value: whether text is editable by default
1894  **/
1895 gboolean
1896 gtk_text_view_get_editable (GtkTextView *text_view)
1897 {
1898   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1899
1900   return text_view->editable;
1901 }
1902
1903 /**
1904  * gtk_text_view_set_pixels_above_lines:
1905  * @text_view: a #GtkTextView
1906  * @pixels_above_lines: pixels above paragraphs
1907  *
1908  * Sets the default number of blank pixels above paragraphs in @text_view.
1909  * Tags in the buffer for @text_view may override the defaults.
1910  *
1911  **/
1912 void
1913 gtk_text_view_set_pixels_above_lines (GtkTextView *text_view,
1914                                       gint         pixels_above_lines)
1915 {
1916   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1917
1918   if (text_view->pixels_above_lines != pixels_above_lines)
1919     {
1920       text_view->pixels_above_lines = pixels_above_lines;
1921
1922       if (text_view->layout)
1923         {
1924           text_view->layout->default_style->pixels_above_lines = pixels_above_lines;
1925           gtk_text_layout_default_style_changed (text_view->layout);
1926         }
1927
1928       g_object_notify (G_OBJECT (text_view), "pixels_above_lines");
1929     }
1930 }
1931
1932 /**
1933  * gtk_text_view_get_pixels_above_lines:
1934  * @text_view: a #GtkTextView
1935  *
1936  * Gets the default number of pixels to put above paragraphs.
1937  *
1938  * Return value: default number of pixels above paragraphs
1939  **/
1940 gint
1941 gtk_text_view_get_pixels_above_lines (GtkTextView *text_view)
1942 {
1943   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1944
1945   return text_view->pixels_above_lines;
1946 }
1947
1948 /**
1949  * gtk_text_view_set_pixels_below_lines:
1950  * @text_view: a #GtkTextView
1951  * @pixels_below_lines: pixels below paragraphs
1952  *
1953  * Sets the default number of pixels of blank space
1954  * to put below paragraphs in @text_view. May be overridden
1955  * by tags applied to @text_view's buffer.
1956  *
1957  **/
1958 void
1959 gtk_text_view_set_pixels_below_lines (GtkTextView *text_view,
1960                                       gint         pixels_below_lines)
1961 {
1962   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1963
1964   if (text_view->pixels_below_lines != pixels_below_lines)
1965     {
1966       text_view->pixels_below_lines = pixels_below_lines;
1967
1968       if (text_view->layout)
1969         {
1970           text_view->layout->default_style->pixels_below_lines = pixels_below_lines;
1971           gtk_text_layout_default_style_changed (text_view->layout);
1972         }
1973
1974       g_object_notify (G_OBJECT (text_view), "pixels_below_lines");
1975     }
1976 }
1977
1978 /**
1979  * gtk_text_view_get_pixels_below_lines:
1980  * @text_view: a #GtkTextView
1981  *
1982  * Gets the value set by gtk_text_view_set_pixels_below_lines().
1983  *
1984  * Return value: default number of blank pixels below paragraphs
1985  **/
1986 gint
1987 gtk_text_view_get_pixels_below_lines (GtkTextView *text_view)
1988 {
1989   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1990
1991   return text_view->pixels_below_lines;
1992 }
1993
1994 /**
1995  * gtk_text_view_set_pixels_inside_wrap:
1996  * @text_view: a #GtkTextView
1997  * @pixels_inside_wrap: default number of pixels between wrapped lines
1998  *
1999  * Sets the default number of pixels of blank space to leave between
2000  * display/wrapped lines within a paragraph. May be overridden by
2001  * tags in @text_view's buffer.
2002  *
2003  **/
2004 void
2005 gtk_text_view_set_pixels_inside_wrap (GtkTextView *text_view,
2006                                       gint         pixels_inside_wrap)
2007 {
2008   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2009
2010   if (text_view->pixels_inside_wrap != pixels_inside_wrap)
2011     {
2012       text_view->pixels_inside_wrap = pixels_inside_wrap;
2013
2014       if (text_view->layout)
2015         {
2016           text_view->layout->default_style->pixels_inside_wrap = pixels_inside_wrap;
2017           gtk_text_layout_default_style_changed (text_view->layout);
2018         }
2019
2020       g_object_notify (G_OBJECT (text_view), "pixels_inside_wrap");
2021     }
2022 }
2023
2024 /**
2025  * gtk_text_view_get_pixels_inside_wrap:
2026  * @text_view: a #GtkTextView
2027  *
2028  * Gets the value set by gtk_text_view_set_pixels_inside_wrap().
2029  *
2030  * Return value: default number of pixels of blank space between wrapped lines
2031  **/
2032 gint
2033 gtk_text_view_get_pixels_inside_wrap (GtkTextView *text_view)
2034 {
2035   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2036
2037   return text_view->pixels_inside_wrap;
2038 }
2039
2040 /**
2041  * gtk_text_view_set_justification:
2042  * @text_view: a #GtkTextView
2043  * @justification: justification
2044  *
2045  * Sets the default justification of text in @text_view.
2046  * Tags in the view's buffer may override the default.
2047  *
2048  **/
2049 void
2050 gtk_text_view_set_justification (GtkTextView     *text_view,
2051                                  GtkJustification justification)
2052 {
2053   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2054
2055   if (text_view->justify != justification)
2056     {
2057       text_view->justify = justification;
2058
2059       if (text_view->layout)
2060         {
2061           text_view->layout->default_style->justification = justification;
2062           gtk_text_layout_default_style_changed (text_view->layout);
2063         }
2064
2065       g_object_notify (G_OBJECT (text_view), "justification");
2066     }
2067 }
2068
2069 /**
2070  * gtk_text_view_get_justification:
2071  * @text_view: a #GtkTextView
2072  *
2073  * Gets the default justification of paragraphs in @text_view.
2074  * Tags in the buffer may override the default.
2075  *
2076  * Return value: default justification
2077  **/
2078 GtkJustification
2079 gtk_text_view_get_justification (GtkTextView *text_view)
2080 {
2081   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_JUSTIFY_LEFT);
2082
2083   return text_view->justify;
2084 }
2085
2086 /**
2087  * gtk_text_view_set_left_margin:
2088  * @text_view: a #GtkTextView
2089  * @left_margin: left margin in pixels
2090  *
2091  * Sets the default left margin for text in @text_view.
2092  * Tags in the buffer may override the default.
2093  *
2094  **/
2095 void
2096 gtk_text_view_set_left_margin (GtkTextView *text_view,
2097                                gint         left_margin)
2098 {
2099   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2100
2101   if (text_view->left_margin != left_margin)
2102     {
2103       text_view->left_margin = left_margin;
2104
2105       if (text_view->layout)
2106         {
2107           text_view->layout->default_style->left_margin = left_margin;
2108           gtk_text_layout_default_style_changed (text_view->layout);
2109         }
2110
2111       g_object_notify (G_OBJECT (text_view), "left_margin");
2112     }
2113 }
2114
2115 /**
2116  * gtk_text_view_get_left_margin:
2117  * @text_view: a #GtkTextView
2118  *
2119  * Gets the default left margin size of paragraphs in the @text_view.
2120  * Tags in the buffer may override the default.
2121  *
2122  * Return value: left margin in pixels
2123  **/
2124 gint
2125 gtk_text_view_get_left_margin (GtkTextView *text_view)
2126 {
2127   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2128
2129   return text_view->left_margin;
2130 }
2131
2132 /**
2133  * gtk_text_view_set_right_margin:
2134  * @text_view: a #GtkTextView
2135  * @right_margin: right margin in pixels
2136  *
2137  * Sets the default right margin for text in the text view.
2138  * Tags in the buffer may override the default.
2139  *
2140  **/
2141 void
2142 gtk_text_view_set_right_margin (GtkTextView *text_view,
2143                                 gint         right_margin)
2144 {
2145   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2146
2147   if (text_view->right_margin != right_margin)
2148     {
2149       text_view->right_margin = right_margin;
2150
2151       if (text_view->layout)
2152         {
2153           text_view->layout->default_style->right_margin = right_margin;
2154           gtk_text_layout_default_style_changed (text_view->layout);
2155         }
2156
2157       g_object_notify (G_OBJECT (text_view), "right_margin");
2158     }
2159 }
2160
2161 /**
2162  * gtk_text_view_get_right_margin:
2163  * @text_view: a #GtkTextView
2164  *
2165  * Gets the default right margin for text in @text_view. Tags
2166  * in the buffer may override the default.
2167  *
2168  * Return value: right margin in pixels
2169  **/
2170 gint
2171 gtk_text_view_get_right_margin (GtkTextView *text_view)
2172 {
2173   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2174
2175   return text_view->right_margin;
2176 }
2177
2178 /**
2179  * gtk_text_view_set_indent:
2180  * @text_view: a #GtkTextView
2181  * @indent: indentation in pixels
2182  *
2183  * Sets the default indentation for paragraphs in @text_view.
2184  * Tags in the buffer may override the default.
2185  *
2186  **/
2187 void
2188 gtk_text_view_set_indent (GtkTextView *text_view,
2189                           gint         indent)
2190 {
2191   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2192
2193   if (text_view->indent != indent)
2194     {
2195       text_view->indent = indent;
2196
2197       if (text_view->layout)
2198         {
2199           text_view->layout->default_style->indent = indent;
2200           gtk_text_layout_default_style_changed (text_view->layout);
2201         }
2202
2203       g_object_notify (G_OBJECT (text_view), "indent");
2204     }
2205 }
2206
2207 /**
2208  * gtk_text_view_get_indent:
2209  * @text_view: a #GtkTextView
2210  *
2211  * Gets the default indentation of paragraphs in @text_view.
2212  * Tags in the view's buffer may override the default.
2213  * The indentation may be negative.
2214  *
2215  * Return value: number of pixels of indentation
2216  **/
2217 gint
2218 gtk_text_view_get_indent (GtkTextView *text_view)
2219 {
2220   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2221
2222   return text_view->indent;
2223 }
2224
2225 /**
2226  * gtk_text_view_set_tabs:
2227  * @text_view: a #GtkTextView
2228  * @tabs: tabs as a #PangoTabArray
2229  *
2230  * Sets the default tab stops for paragraphs in @text_view.
2231  * Tags in the buffer may override the default.
2232  *
2233  **/
2234 void
2235 gtk_text_view_set_tabs (GtkTextView   *text_view,
2236                         PangoTabArray *tabs)
2237 {
2238   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2239
2240   if (text_view->tabs)
2241     pango_tab_array_free (text_view->tabs);
2242
2243   text_view->tabs = tabs ? pango_tab_array_copy (tabs) : NULL;
2244
2245   if (text_view->layout)
2246     {
2247       /* some unkosher futzing in internal struct details... */
2248       if (text_view->layout->default_style->tabs)
2249         pango_tab_array_free (text_view->layout->default_style->tabs);
2250
2251       text_view->layout->default_style->tabs =
2252         text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
2253
2254       gtk_text_layout_default_style_changed (text_view->layout);
2255     }
2256
2257   g_object_notify (G_OBJECT (text_view), "tabs");
2258 }
2259
2260 /**
2261  * gtk_text_view_get_tabs:
2262  * @text_view: a #GtkTextView
2263  *
2264  * Gets the default tabs for @text_view. Tags in the buffer may
2265  * override the defaults. The returned array will be %NULL if
2266  * "standard" (8-space) tabs are used. Free the return value
2267  * with pango_tab_array_free().
2268  *
2269  * Return value: copy of default tab array, or %NULL if "standard" tabs are used; must be freed with pango_tab_array_free().
2270  **/
2271 PangoTabArray*
2272 gtk_text_view_get_tabs (GtkTextView *text_view)
2273 {
2274   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
2275
2276   return text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
2277 }
2278
2279 /**
2280  * gtk_text_view_set_cursor_visible:
2281  * @text_view: a #GtkTextView
2282  * @setting: whether to show the insertion cursor
2283  *
2284  * Toggles whether the insertion point is displayed. A buffer with no editable
2285  * text probably shouldn't have a visible cursor, so you may want to turn
2286  * the cursor off.
2287  **/
2288 void
2289 gtk_text_view_set_cursor_visible    (GtkTextView   *text_view,
2290                                      gboolean       setting)
2291 {
2292   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2293
2294   setting = (setting != FALSE);
2295
2296   if (text_view->cursor_visible != setting)
2297     {
2298       text_view->cursor_visible = setting;
2299
2300       if (GTK_WIDGET_HAS_FOCUS (text_view))
2301         {
2302           if (text_view->layout)
2303             {
2304               gtk_text_layout_set_cursor_visible (text_view->layout, setting);
2305               gtk_text_view_check_cursor_blink (text_view);
2306             }
2307         }
2308
2309       g_object_notify (G_OBJECT (text_view), "cursor_visible");
2310     }
2311 }
2312
2313 /**
2314  * gtk_text_view_get_cursor_visible:
2315  * @text_view: a #GtkTextView
2316  *
2317  * Find out whether the cursor is being displayed.
2318  *
2319  * Return value: whether the insertion mark is visible
2320  **/
2321 gboolean
2322 gtk_text_view_get_cursor_visible    (GtkTextView   *text_view)
2323 {
2324   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
2325
2326   return text_view->cursor_visible;
2327 }
2328
2329
2330 /**
2331  * gtk_text_view_place_cursor_onscreen:
2332  * @text_view: a #GtkTextView
2333  *
2334  * Moves the cursor to the currently visible region of the
2335  * buffer, it it isn't there already.
2336  *
2337  * Return value: TRUE if the cursor had to be moved.
2338  **/
2339 gboolean
2340 gtk_text_view_place_cursor_onscreen (GtkTextView *text_view)
2341 {
2342   GtkTextIter insert;
2343
2344   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
2345
2346   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
2347                                     gtk_text_buffer_get_mark (get_buffer (text_view),
2348                                                               "insert"));
2349
2350   if (clamp_iter_onscreen (text_view, &insert))
2351     {
2352       gtk_text_buffer_place_cursor (get_buffer (text_view), &insert);
2353       return TRUE;
2354     }
2355   else
2356     return FALSE;
2357 }
2358
2359 static void
2360 gtk_text_view_remove_validate_idles (GtkTextView *text_view)
2361 {
2362   if (text_view->first_validate_idle != 0)
2363     {
2364       DV (g_print ("Removing first validate idle: %s\n", G_STRLOC));
2365       g_source_remove (text_view->first_validate_idle);
2366       text_view->first_validate_idle = 0;
2367     }
2368
2369   if (text_view->incremental_validate_idle != 0)
2370     {
2371       g_source_remove (text_view->incremental_validate_idle);
2372       text_view->incremental_validate_idle = 0;
2373     }
2374 }
2375
2376 static void
2377 gtk_text_view_destroy (GtkObject *object)
2378 {
2379   GtkTextView *text_view;
2380   GtkTextLayout *layout;
2381
2382   text_view = GTK_TEXT_VIEW (object);
2383
2384   layout = text_view->layout;
2385
2386   gtk_text_view_remove_validate_idles (text_view);
2387   gtk_text_view_set_buffer (text_view, NULL);
2388   gtk_text_view_destroy_layout (text_view);
2389
2390   (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
2391 }
2392
2393 static void
2394 gtk_text_view_finalize (GObject *object)
2395 {
2396   GtkTextView *text_view;
2397
2398   text_view = GTK_TEXT_VIEW (object);
2399
2400   g_return_if_fail (text_view->buffer == NULL);
2401
2402   gtk_text_view_destroy_layout (text_view);
2403   gtk_text_view_set_buffer (text_view, NULL);
2404
2405   if (text_view->pending_scroll)
2406     {
2407       free_pending_scroll (text_view->pending_scroll);
2408       text_view->pending_scroll = NULL;
2409     }
2410
2411   if (text_view->hadjustment)
2412     g_object_unref (G_OBJECT (text_view->hadjustment));
2413   if (text_view->vadjustment)
2414     g_object_unref (G_OBJECT (text_view->vadjustment));
2415
2416   text_window_free (text_view->text_window);
2417
2418   if (text_view->left_window)
2419     text_window_free (text_view->left_window);
2420
2421   if (text_view->top_window)
2422     text_window_free (text_view->top_window);
2423
2424   if (text_view->right_window)
2425     text_window_free (text_view->right_window);
2426
2427   if (text_view->bottom_window)
2428     text_window_free (text_view->bottom_window);
2429
2430   g_object_unref (G_OBJECT (text_view->im_context));
2431
2432   (* G_OBJECT_CLASS (parent_class)->finalize) (object);
2433 }
2434
2435 static void
2436 gtk_text_view_set_property (GObject         *object,
2437                             guint            prop_id,
2438                             const GValue    *value,
2439                             GParamSpec      *pspec)
2440 {
2441   GtkTextView *text_view;
2442
2443   text_view = GTK_TEXT_VIEW (object);
2444
2445   switch (prop_id)
2446     {
2447     case PROP_PIXELS_ABOVE_LINES:
2448       gtk_text_view_set_pixels_above_lines (text_view, g_value_get_int (value));
2449       break;
2450
2451     case PROP_PIXELS_BELOW_LINES:
2452       gtk_text_view_set_pixels_below_lines (text_view, g_value_get_int (value));
2453       break;
2454
2455     case PROP_PIXELS_INSIDE_WRAP:
2456       gtk_text_view_set_pixels_inside_wrap (text_view, g_value_get_int (value));
2457       break;
2458
2459     case PROP_EDITABLE:
2460       gtk_text_view_set_editable (text_view, g_value_get_boolean (value));
2461       break;
2462
2463     case PROP_WRAP_MODE:
2464       gtk_text_view_set_wrap_mode (text_view, g_value_get_enum (value));
2465       break;
2466
2467     case PROP_JUSTIFICATION:
2468       gtk_text_view_set_justification (text_view, g_value_get_enum (value));
2469       break;
2470
2471     case PROP_LEFT_MARGIN:
2472       gtk_text_view_set_left_margin (text_view, g_value_get_int (value));
2473       break;
2474
2475     case PROP_RIGHT_MARGIN:
2476       gtk_text_view_set_right_margin (text_view, g_value_get_int (value));
2477       break;
2478
2479     case PROP_INDENT:
2480       gtk_text_view_set_indent (text_view, g_value_get_int (value));
2481       break;
2482
2483     case PROP_TABS:
2484       gtk_text_view_set_tabs (text_view, g_value_get_boxed (value));
2485       break;
2486
2487     case PROP_CURSOR_VISIBLE:
2488       gtk_text_view_set_cursor_visible (text_view, g_value_get_boolean (value));
2489       break;
2490
2491     default:
2492       g_assert_not_reached ();
2493       break;
2494     }
2495 }
2496
2497 static void
2498 gtk_text_view_get_property (GObject         *object,
2499                             guint            prop_id,
2500                             GValue          *value,
2501                             GParamSpec      *pspec)
2502 {
2503   GtkTextView *text_view;
2504
2505   text_view = GTK_TEXT_VIEW (object);
2506
2507   switch (prop_id)
2508     {
2509     case PROP_PIXELS_ABOVE_LINES:
2510       g_value_set_int (value, text_view->pixels_above_lines);
2511       break;
2512
2513     case PROP_PIXELS_BELOW_LINES:
2514       g_value_set_int (value, text_view->pixels_below_lines);
2515       break;
2516
2517     case PROP_PIXELS_INSIDE_WRAP:
2518       g_value_set_int (value, text_view->pixels_inside_wrap);
2519       break;
2520
2521     case PROP_EDITABLE:
2522       g_value_set_boolean (value, text_view->editable);
2523       break;
2524
2525     case PROP_WRAP_MODE:
2526       g_value_set_enum (value, text_view->wrap_mode);
2527       break;
2528
2529     case PROP_JUSTIFICATION:
2530       g_value_set_enum (value, text_view->justify);
2531       break;
2532
2533     case PROP_LEFT_MARGIN:
2534       g_value_set_int (value, text_view->left_margin);
2535       break;
2536
2537     case PROP_RIGHT_MARGIN:
2538       g_value_set_int (value, text_view->right_margin);
2539       break;
2540
2541     case PROP_INDENT:
2542       g_value_set_int (value, text_view->indent);
2543       break;
2544
2545     case PROP_TABS:
2546       g_value_set_boxed (value, text_view->tabs);
2547       break;
2548
2549     case PROP_CURSOR_VISIBLE:
2550       g_value_set_boolean (value, text_view->cursor_visible);
2551       break;
2552
2553     default:
2554       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2555       break;
2556     }
2557 }
2558
2559 static void
2560 gtk_text_view_size_request (GtkWidget      *widget,
2561                             GtkRequisition *requisition)
2562 {
2563   GtkTextView *text_view;
2564   GSList *tmp_list;
2565   gint focus_edge_width;
2566   gint focus_width;
2567   gboolean interior_focus;
2568
2569   text_view = GTK_TEXT_VIEW (widget);
2570
2571   gtk_widget_style_get (widget,
2572                         "interior_focus", &interior_focus,
2573                         "focus_line_width", &focus_width,
2574                         NULL);
2575
2576   if (interior_focus)
2577     focus_edge_width = 0;
2578   else
2579     focus_edge_width = focus_width;
2580
2581   if (text_view->layout)
2582     {
2583       text_view->text_window->requisition.width = text_view->layout->width;
2584       text_view->text_window->requisition.height = text_view->layout->height;
2585     }
2586   else
2587     {
2588       text_view->text_window->requisition.width = 0;
2589       text_view->text_window->requisition.height = 0;
2590     }
2591
2592   requisition->width = text_view->text_window->requisition.width + focus_edge_width * 2;
2593   requisition->height = text_view->text_window->requisition.height + focus_edge_width * 2;
2594
2595   if (text_view->left_window)
2596     requisition->width += text_view->left_window->requisition.width;
2597
2598   if (text_view->right_window)
2599     requisition->width += text_view->right_window->requisition.width;
2600
2601   if (text_view->top_window)
2602     requisition->height += text_view->top_window->requisition.height;
2603
2604   if (text_view->bottom_window)
2605     requisition->height += text_view->bottom_window->requisition.height;
2606
2607   requisition->width += GTK_CONTAINER (text_view)->border_width * 2;
2608   requisition->height += GTK_CONTAINER (text_view)->border_width * 2;
2609
2610   tmp_list = text_view->children;
2611   while (tmp_list != NULL)
2612     {
2613       GtkTextViewChild *child = tmp_list->data;
2614
2615       if (child->anchor)
2616         {
2617           GtkRequisition child_req;
2618           GtkRequisition old_req;
2619
2620           gtk_widget_get_child_requisition (child->widget, &old_req);
2621
2622           gtk_widget_size_request (child->widget, &child_req);
2623
2624           gtk_widget_get_child_requisition (child->widget, &child_req);
2625
2626           /* Invalidate layout lines if required */
2627           if (text_view->layout &&
2628               (old_req.width != child_req.width ||
2629                old_req.height != child_req.height))
2630             gtk_text_child_anchor_queue_resize (child->anchor,
2631                                                 text_view->layout);
2632         }
2633       else
2634         {
2635           GtkRequisition child_req;
2636
2637           gtk_widget_size_request (child->widget, &child_req);
2638         }
2639
2640       tmp_list = g_slist_next (tmp_list);
2641     }
2642 }
2643
2644 static void
2645 gtk_text_view_compute_child_allocation (GtkTextView      *text_view,
2646                                         GtkTextViewChild *vc,
2647                                         GtkAllocation    *allocation)
2648 {
2649   gint buffer_y;
2650   GtkTextIter iter;
2651   GtkRequisition req;
2652
2653   gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
2654                                             &iter,
2655                                             vc->anchor);
2656
2657   gtk_text_layout_get_line_yrange (text_view->layout, &iter,
2658                                    &buffer_y, NULL);
2659
2660   buffer_y += vc->from_top_of_line;
2661
2662   allocation->x = vc->from_left_of_buffer - text_view->xoffset;
2663   allocation->y = buffer_y - text_view->yoffset;
2664
2665   gtk_widget_get_child_requisition (vc->widget, &req);
2666   allocation->width = req.width;
2667   allocation->height = req.height;
2668 }
2669
2670 static void
2671 gtk_text_view_update_child_allocation (GtkTextView      *text_view,
2672                                        GtkTextViewChild *vc)
2673 {
2674   GtkAllocation allocation;
2675
2676   gtk_text_view_compute_child_allocation (text_view, vc, &allocation);
2677
2678   gtk_widget_size_allocate (vc->widget, &allocation);
2679
2680 #if 0
2681   g_print ("allocation for %p allocated to %d,%d yoffset = %d\n",
2682            vc->widget,
2683            vc->widget->allocation.x,
2684            vc->widget->allocation.y,
2685            text_view->yoffset);
2686 #endif
2687 }
2688
2689 static void
2690 gtk_text_view_child_allocated (GtkTextLayout *layout,
2691                                GtkWidget     *child,
2692                                gint           x,
2693                                gint           y,
2694                                gpointer       data)
2695 {
2696   GtkTextViewChild *vc = NULL;
2697   GtkTextView *text_view = data;
2698
2699   /* x,y is the position of the child from the top of the line, and
2700    * from the left of the buffer. We have to translate that into text
2701    * window coordinates, then size_allocate the child.
2702    */
2703
2704   vc = g_object_get_data (G_OBJECT (child),
2705                           "gtk-text-view-child");
2706
2707   g_assert (vc != NULL);
2708
2709   DV (g_print ("child allocated at %d,%d\n", x, y));
2710
2711   vc->from_left_of_buffer = x;
2712   vc->from_top_of_line = y;
2713
2714   gtk_text_view_update_child_allocation (text_view, vc);
2715 }
2716
2717 static void
2718 gtk_text_view_allocate_children (GtkTextView *text_view)
2719 {
2720   GSList *tmp_list;
2721
2722   DV(g_print(G_STRLOC"\n"));
2723
2724   tmp_list = text_view->children;
2725   while (tmp_list != NULL)
2726     {
2727       GtkTextViewChild *child = tmp_list->data;
2728
2729       if (child->anchor)
2730         {
2731           /* We need to force-validate the regions containing
2732            * children.
2733            */
2734           GtkTextIter child_loc;
2735           gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
2736                                                     &child_loc,
2737                                                     child->anchor);
2738
2739           gtk_text_layout_validate_yrange (text_view->layout,
2740                                            &child_loc,
2741                                            0, 1);
2742         }
2743       else
2744         {
2745           GtkAllocation allocation;
2746           GtkRequisition child_req;
2747
2748           g_assert (child != NULL);
2749
2750           allocation.x = child->x;
2751           allocation.y = child->y;
2752
2753           gtk_widget_get_child_requisition (child->widget, &child_req);
2754
2755           allocation.width = child_req.width;
2756           allocation.height = child_req.height;
2757
2758           gtk_widget_size_allocate (child->widget, &allocation);
2759         }
2760
2761       tmp_list = g_slist_next (tmp_list);
2762     }
2763 }
2764
2765 static void
2766 gtk_text_view_size_allocate (GtkWidget *widget,
2767                              GtkAllocation *allocation)
2768 {
2769   GtkTextView *text_view;
2770   GtkTextIter first_para;
2771   gint y;
2772   GtkAdjustment *vadj;
2773   gboolean yoffset_changed = FALSE;
2774   gint width, height;
2775   GdkRectangle text_rect;
2776   GdkRectangle left_rect;
2777   GdkRectangle right_rect;
2778   GdkRectangle top_rect;
2779   GdkRectangle bottom_rect;
2780   gint focus_edge_width;
2781   gint focus_width;
2782   gboolean interior_focus;
2783   gboolean size_changed;
2784
2785   text_view = GTK_TEXT_VIEW (widget);
2786
2787   DV(g_print(G_STRLOC"\n"));
2788
2789   size_changed =
2790     widget->allocation.width != allocation->width ||
2791     widget->allocation.height != allocation->height;
2792
2793   widget->allocation = *allocation;
2794
2795   if (GTK_WIDGET_REALIZED (widget))
2796     {
2797       gdk_window_move_resize (widget->window,
2798                               allocation->x, allocation->y,
2799                               allocation->width, allocation->height);
2800     }
2801
2802   /* distribute width/height among child windows. Ensure all
2803    * windows get at least a 1x1 allocation.
2804    */
2805
2806   gtk_widget_style_get (widget,
2807                         "interior_focus", &interior_focus,
2808                         "focus_line_width", &focus_width,
2809                         NULL);
2810
2811   if (interior_focus)
2812     focus_edge_width = 0;
2813   else
2814     focus_edge_width = focus_width;
2815
2816   width = allocation->width - focus_edge_width * 2 - GTK_CONTAINER (text_view)->border_width * 2;
2817
2818   if (text_view->left_window)
2819     left_rect.width = text_view->left_window->requisition.width;
2820   else
2821     left_rect.width = 0;
2822
2823   width -= left_rect.width;
2824
2825   if (text_view->right_window)
2826     right_rect.width = text_view->right_window->requisition.width;
2827   else
2828     right_rect.width = 0;
2829
2830   width -= right_rect.width;
2831
2832   text_rect.width = MAX (1, width);
2833
2834   top_rect.width = text_rect.width;
2835   bottom_rect.width = text_rect.width;
2836
2837
2838   height = allocation->height - focus_edge_width * 2 - GTK_CONTAINER (text_view)->border_width * 2;
2839
2840   if (text_view->top_window)
2841     top_rect.height = text_view->top_window->requisition.height;
2842   else
2843     top_rect.height = 0;
2844
2845   height -= top_rect.height;
2846
2847   if (text_view->bottom_window)
2848     bottom_rect.height = text_view->bottom_window->requisition.height;
2849   else
2850     bottom_rect.height = 0;
2851
2852   height -= bottom_rect.height;
2853
2854   text_rect.height = MAX (1, height);
2855
2856   left_rect.height = text_rect.height;
2857   right_rect.height = text_rect.height;
2858
2859   /* Origins */
2860   left_rect.x = focus_edge_width + GTK_CONTAINER (text_view)->border_width;
2861   top_rect.y = focus_edge_width + GTK_CONTAINER (text_view)->border_width;
2862
2863   text_rect.x = left_rect.x + left_rect.width;
2864   text_rect.y = top_rect.y + top_rect.height;
2865
2866   left_rect.y = text_rect.y;
2867   right_rect.y = text_rect.y;
2868
2869   top_rect.x = text_rect.x;
2870   bottom_rect.x = text_rect.x;
2871
2872   right_rect.x = text_rect.x + text_rect.width;
2873   bottom_rect.y = text_rect.y + text_rect.height;
2874
2875   text_window_size_allocate (text_view->text_window,
2876                              &text_rect);
2877
2878   if (text_view->left_window)
2879     text_window_size_allocate (text_view->left_window,
2880                                &left_rect);
2881
2882   if (text_view->right_window)
2883     text_window_size_allocate (text_view->right_window,
2884                                &right_rect);
2885
2886   if (text_view->top_window)
2887     text_window_size_allocate (text_view->top_window,
2888                                &top_rect);
2889
2890   if (text_view->bottom_window)
2891     text_window_size_allocate (text_view->bottom_window,
2892                                &bottom_rect);
2893
2894   gtk_text_view_update_layout_width (text_view);
2895
2896   /* Note that this will do some layout validation */
2897   gtk_text_view_allocate_children (text_view);
2898
2899   /* Now adjust the value of the adjustment to keep the cursor at the
2900    * same place in the buffer
2901    */
2902   gtk_text_view_get_first_para_iter (text_view, &first_para);
2903   gtk_text_layout_get_line_yrange (text_view->layout, &first_para, &y, NULL);
2904
2905   y += text_view->first_para_pixels;
2906
2907   /* Ensure h/v adj exist */
2908   get_hadjustment (text_view);
2909   get_vadjustment (text_view);
2910
2911   vadj = text_view->vadjustment;
2912   if (y > vadj->upper - vadj->page_size)
2913     y = MAX (0, vadj->upper - vadj->page_size);
2914
2915   if (y != text_view->yoffset)
2916     {
2917       vadj->value = text_view->yoffset = y;
2918       yoffset_changed = TRUE;
2919     }
2920
2921   text_view->hadjustment->page_size = SCREEN_WIDTH (text_view);
2922   text_view->hadjustment->page_increment = SCREEN_WIDTH (text_view) * 0.9;
2923   text_view->hadjustment->step_increment = SCREEN_WIDTH (text_view) * 0.1;
2924   text_view->hadjustment->lower = 0;
2925   text_view->hadjustment->upper = MAX (SCREEN_WIDTH (text_view),
2926                                        text_view->width);
2927   gtk_signal_emit_by_name (GTK_OBJECT (text_view->hadjustment), "changed");
2928
2929   text_view->vadjustment->page_size = SCREEN_HEIGHT (text_view);
2930   text_view->vadjustment->page_increment = SCREEN_HEIGHT (text_view) * 0.9;
2931   text_view->vadjustment->step_increment = SCREEN_HEIGHT (text_view) * 0.1;
2932   text_view->vadjustment->lower = 0;
2933   text_view->vadjustment->upper = MAX (SCREEN_HEIGHT (text_view),
2934                                        text_view->height);
2935   gtk_signal_emit_by_name (GTK_OBJECT (text_view->vadjustment), "changed");
2936
2937   if (yoffset_changed)
2938     gtk_adjustment_value_changed (vadj);
2939
2940   /* The GTK resize loop processes all the pending exposes right
2941    * after doing the resize stuff, so the idle sizer won't have a
2942    * chance to run. So we do the work here.
2943    */
2944   gtk_text_view_flush_first_validate (text_view);
2945
2946   /* widget->window doesn't get auto-redrawn as the layout is computed, so has to
2947    * be invalidated
2948    */
2949   if (size_changed && GTK_WIDGET_REALIZED (widget))
2950     gdk_window_invalidate_rect (widget->window, NULL, FALSE);
2951 }
2952
2953 static void
2954 gtk_text_view_get_first_para_iter (GtkTextView *text_view,
2955                                    GtkTextIter *iter)
2956 {
2957   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), iter,
2958                                     text_view->first_para_mark);
2959 }
2960
2961 static void
2962 gtk_text_view_validate_onscreen (GtkTextView *text_view)
2963 {
2964   GtkWidget *widget = GTK_WIDGET (text_view);
2965
2966   DV(g_print(">Validating onscreen ("G_STRLOC")\n"));
2967
2968   if (SCREEN_HEIGHT (widget) > 0)
2969     {
2970       GtkTextIter first_para;
2971
2972       /* Be sure we've validated the stuff onscreen; if we
2973        * scrolled, these calls won't have any effect, because
2974        * they were called in the recursive validate_onscreen
2975        */
2976       gtk_text_view_get_first_para_iter (text_view, &first_para);
2977
2978       gtk_text_layout_validate_yrange (text_view->layout,
2979                                        &first_para,
2980                                        0,
2981                                        text_view->first_para_pixels +
2982                                        SCREEN_HEIGHT (widget));
2983     }
2984
2985   text_view->onscreen_validated = TRUE;
2986
2987   DV(g_print(">Done validating onscreen, onscreen_validated = TRUE ("G_STRLOC")\n"));
2988
2989   /* This can have the odd side effect of triggering a scroll, which should
2990    * flip "onscreen_validated" back to FALSE, but should also get us
2991    * back into this function to turn it on again.
2992    */
2993   gtk_text_view_update_adjustments (text_view);
2994
2995   g_assert (text_view->onscreen_validated);
2996 }
2997
2998 static void
2999 gtk_text_view_flush_first_validate (GtkTextView *text_view)
3000 {
3001   if (text_view->first_validate_idle == 0)
3002     return;
3003
3004   /* Do this first, which means that if an "invalidate"
3005    * occurs during any of this process, a new first_validate_callback
3006    * will be installed, and we'll start again.
3007    */
3008   DV (g_print ("removing first validate in %s\n", G_STRLOC));
3009   g_source_remove (text_view->first_validate_idle);
3010   text_view->first_validate_idle = 0;
3011
3012   /* be sure we have up-to-date screen size set on the
3013    * layout.
3014    */
3015   gtk_text_view_update_layout_width (text_view);
3016
3017   /* Bail out if we invalidated stuff; scrolling right away will just
3018    * confuse the issue.
3019    */
3020   if (text_view->first_validate_idle != 0)
3021     {
3022       DV(g_print(">Width change forced requeue ("G_STRLOC")\n"));
3023     }
3024   else
3025     {
3026       /* scroll to any marks, if that's pending. This can
3027        * jump us to the validation codepath used for scrolling
3028        * onscreen, if so we bail out.
3029        */
3030       if (!gtk_text_view_flush_scroll (text_view))
3031         gtk_text_view_validate_onscreen (text_view);
3032
3033       DV(g_print(">Leaving first validate idle ("G_STRLOC")\n"));
3034
3035       g_assert (text_view->onscreen_validated);
3036     }
3037 }
3038
3039 static gboolean
3040 first_validate_callback (gpointer data)
3041 {
3042   GtkTextView *text_view = data;
3043
3044   GDK_THREADS_ENTER ();
3045
3046   /* Note that some of this code is duplicated at the end of size_allocate,
3047    * keep in sync with that.
3048    */
3049
3050   DV(g_print(G_STRLOC"\n"));
3051
3052   gtk_text_view_flush_first_validate (text_view);
3053
3054   GDK_THREADS_LEAVE ();
3055
3056   return FALSE;
3057 }
3058
3059 static gboolean
3060 incremental_validate_callback (gpointer data)
3061 {
3062   GtkTextView *text_view = data;
3063   gboolean result = TRUE;
3064
3065   GDK_THREADS_ENTER ();
3066
3067   DV(g_print(G_STRLOC"\n"));
3068
3069   gtk_text_layout_validate (text_view->layout, 2000);
3070
3071   gtk_text_view_update_adjustments (text_view);
3072
3073   if (gtk_text_layout_is_valid (text_view->layout))
3074     {
3075       text_view->incremental_validate_idle = 0;
3076       result = FALSE;
3077     }
3078
3079   GDK_THREADS_LEAVE ();
3080
3081   return result;
3082 }
3083
3084 static void
3085 gtk_text_view_invalidate (GtkTextView *text_view)
3086 {
3087   DV (g_print (">Invalidate, onscreen_validated = %d now FALSE ("G_STRLOC")\n",
3088                text_view->onscreen_validated));
3089
3090   text_view->onscreen_validated = FALSE;
3091
3092   if (!text_view->first_validate_idle)
3093     {
3094       text_view->first_validate_idle = g_idle_add_full (GTK_PRIORITY_RESIZE - 2, first_validate_callback, text_view, NULL);
3095       DV (g_print (G_STRLOC": adding first validate idle %d\n",
3096                    text_view->first_validate_idle));
3097     }
3098
3099   if (!text_view->incremental_validate_idle)
3100     {
3101       text_view->incremental_validate_idle = g_idle_add_full (GTK_TEXT_VIEW_PRIORITY_VALIDATE, incremental_validate_callback, text_view, NULL);
3102       DV (g_print (G_STRLOC": adding incremental validate idle %d\n",
3103                    text_view->incremental_validate_idle));
3104     }
3105 }
3106
3107 static void
3108 invalidated_handler (GtkTextLayout *layout,
3109                      gpointer       data)
3110 {
3111   GtkTextView *text_view;
3112
3113   text_view = GTK_TEXT_VIEW (data);
3114
3115   DV (g_print ("Invalidating due to layout invalidate signal\n"));
3116   gtk_text_view_invalidate (text_view);
3117 }
3118
3119 static void
3120 changed_handler (GtkTextLayout     *layout,
3121                  gint               start_y,
3122                  gint               old_height,
3123                  gint               new_height,
3124                  gpointer           data)
3125 {
3126   GtkTextView *text_view;
3127   GtkWidget *widget;
3128   GdkRectangle visible_rect;
3129   GdkRectangle redraw_rect;
3130
3131   text_view = GTK_TEXT_VIEW (data);
3132   widget = GTK_WIDGET (data);
3133
3134   DV(g_print(">Lines Validated ("G_STRLOC")\n"));
3135
3136   if (GTK_WIDGET_REALIZED (text_view))
3137     {
3138       gtk_text_view_get_visible_rect (text_view, &visible_rect);
3139
3140       redraw_rect.x = visible_rect.x;
3141       redraw_rect.width = visible_rect.width;
3142       redraw_rect.y = start_y;
3143
3144       if (old_height == new_height)
3145         redraw_rect.height = old_height;
3146       else
3147         redraw_rect.height = MAX (0, visible_rect.y + visible_rect.height - start_y);
3148
3149       if (gdk_rectangle_intersect (&redraw_rect, &visible_rect, &redraw_rect))
3150         {
3151           /* text_window_invalidate_rect() takes buffer coordinates */
3152           text_window_invalidate_rect (text_view->text_window,
3153                                        &redraw_rect);
3154
3155           DV(g_print(" invalidated rect: %d,%d %d x %d\n",
3156                      redraw_rect.x,
3157                      redraw_rect.y,
3158                      redraw_rect.width,
3159                      redraw_rect.height));
3160
3161           if (text_view->left_window)
3162             text_window_invalidate_rect (text_view->left_window,
3163                                          &redraw_rect);
3164           if (text_view->right_window)
3165             text_window_invalidate_rect (text_view->right_window,
3166                                          &redraw_rect);
3167           if (text_view->top_window)
3168             text_window_invalidate_rect (text_view->top_window,
3169                                          &redraw_rect);
3170           if (text_view->bottom_window)
3171             text_window_invalidate_rect (text_view->bottom_window,
3172                                          &redraw_rect);
3173
3174           gtk_text_view_update_im_spot_location (text_view);
3175         }
3176     }
3177
3178   if (old_height != new_height)
3179     {
3180       gboolean yoffset_changed = FALSE;
3181       GSList *tmp_list;
3182       int new_first_para_top;
3183       int old_first_para_top;
3184       GtkTextIter first;
3185
3186       /* If the bottom of the old area was above the top of the
3187        * screen, we need to scroll to keep the current top of the
3188        * screen in place.  Remember that first_para_pixels is the
3189        * position of the top of the screen in coordinates relative to
3190        * the first paragraph onscreen.
3191        *
3192        * In short we are adding the height delta of the portion of the
3193        * changed region above first_para_mark to text_view->yoffset.
3194        */
3195       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &first,
3196                                         text_view->first_para_mark);
3197
3198       gtk_text_layout_get_line_yrange (layout, &first, &new_first_para_top, NULL);
3199
3200       old_first_para_top = text_view->yoffset - text_view->first_para_pixels;
3201
3202       if (new_first_para_top != old_first_para_top)
3203         {
3204           text_view->yoffset += new_first_para_top - old_first_para_top;
3205
3206           get_vadjustment (text_view)->value = text_view->yoffset;
3207           yoffset_changed = TRUE;
3208         }
3209
3210       if (yoffset_changed)
3211         {
3212           DV(g_print ("Changing scroll position (%s)\n", G_STRLOC));
3213           gtk_adjustment_value_changed (get_vadjustment (text_view));
3214         }
3215
3216       /* FIXME be smarter about which anchored widgets we update */
3217
3218       tmp_list = text_view->children;
3219       while (tmp_list != NULL)
3220         {
3221           GtkTextViewChild *child = tmp_list->data;
3222
3223           if (child->anchor)
3224             gtk_text_view_update_child_allocation (text_view, child);
3225
3226           tmp_list = g_slist_next (tmp_list);
3227         }
3228     }
3229
3230   {
3231     GtkRequisition old_req;
3232     GtkRequisition new_req;
3233
3234     old_req = widget->requisition;
3235
3236     /* Use this instead of gtk_widget_size_request wrapper
3237      * to avoid the optimization which just returns widget->requisition
3238      * if a resize hasn't been queued.
3239      */
3240     GTK_WIDGET_GET_CLASS (widget)->size_request (widget, &new_req);
3241
3242     if (old_req.width != new_req.width ||
3243         old_req.height != new_req.height)
3244       {
3245         /* FIXME http://bugzilla.gnome.org/show_bug.cgi?id=72258 */
3246         _gtk_size_group_queue_resize (widget);
3247       }
3248   }
3249 }
3250
3251 static void
3252 gtk_text_view_realize_cursor_gc (GtkTextView *text_view)
3253 {
3254   GdkColor *cursor_color;
3255   GdkColor red = { 0, 0xffff, 0x0000, 0x0000 };
3256
3257   if (text_view->cursor_gc)
3258     gdk_gc_unref (text_view->cursor_gc);
3259
3260   gtk_widget_style_get (GTK_WIDGET (text_view), "cursor-color", &cursor_color, NULL);
3261
3262   if (!cursor_color)
3263     cursor_color = &red;
3264
3265   text_view->cursor_gc = gdk_gc_new (text_view->text_window->bin_window);
3266   gdk_gc_set_rgb_fg_color (text_view->cursor_gc, cursor_color);
3267 }
3268
3269 static void
3270 gtk_text_view_realize (GtkWidget *widget)
3271 {
3272   GtkTextView *text_view;
3273   GdkWindowAttr attributes;
3274   gint attributes_mask;
3275   GSList *tmp_list;
3276
3277   text_view = GTK_TEXT_VIEW (widget);
3278   GTK_WIDGET_SET_FLAGS (text_view, GTK_REALIZED);
3279
3280   attributes.window_type = GDK_WINDOW_CHILD;
3281   attributes.x = widget->allocation.x;
3282   attributes.y = widget->allocation.y;
3283   attributes.width = widget->allocation.width;
3284   attributes.height = widget->allocation.height;
3285   attributes.wclass = GDK_INPUT_OUTPUT;
3286   attributes.visual = gtk_widget_get_visual (widget);
3287   attributes.colormap = gtk_widget_get_colormap (widget);
3288   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK | GDK_EXPOSURE_MASK;
3289
3290   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
3291
3292   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
3293                                    &attributes, attributes_mask);
3294   gdk_window_set_user_data (widget->window, widget);
3295
3296   /* must come before text_window_realize calls */
3297   widget->style = gtk_style_attach (widget->style, widget->window);
3298
3299   gdk_window_set_background (widget->window,
3300                              &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3301
3302   text_window_realize (text_view->text_window, widget->window);
3303
3304   if (text_view->left_window)
3305     text_window_realize (text_view->left_window,
3306                          widget->window);
3307
3308   if (text_view->top_window)
3309     text_window_realize (text_view->top_window,
3310                          widget->window);
3311
3312   if (text_view->right_window)
3313     text_window_realize (text_view->right_window,
3314                          widget->window);
3315
3316   if (text_view->bottom_window)
3317     text_window_realize (text_view->bottom_window,
3318                          widget->window);
3319
3320   gtk_text_view_realize_cursor_gc (text_view);
3321
3322   gtk_text_view_ensure_layout (text_view);
3323
3324   if (text_view->buffer)
3325     gtk_text_buffer_add_selection_clipboard (text_view->buffer,
3326                                              gtk_clipboard_get (GDK_SELECTION_PRIMARY));
3327
3328   tmp_list = text_view->children;
3329   while (tmp_list != NULL)
3330     {
3331       GtkTextViewChild *vc = tmp_list->data;
3332
3333       text_view_child_set_parent_window (text_view, vc);
3334
3335       tmp_list = tmp_list->next;
3336     }
3337 }
3338
3339 static void
3340 gtk_text_view_unrealize (GtkWidget *widget)
3341 {
3342   GtkTextView *text_view;
3343
3344   text_view = GTK_TEXT_VIEW (widget);
3345
3346   if (text_view->buffer)
3347     gtk_text_buffer_remove_selection_clipboard (text_view->buffer,
3348                                                 gtk_clipboard_get (GDK_SELECTION_PRIMARY));
3349
3350   if (text_view->cursor_gc)
3351     {
3352       gdk_gc_unref (text_view->cursor_gc);
3353       text_view->cursor_gc = NULL;
3354     }
3355
3356   gtk_text_view_remove_validate_idles (text_view);
3357
3358   if (text_view->popup_menu)
3359     {
3360       gtk_widget_destroy (text_view->popup_menu);
3361       text_view->popup_menu = NULL;
3362     }
3363
3364   text_window_unrealize (text_view->text_window);
3365
3366   if (text_view->left_window)
3367     text_window_unrealize (text_view->left_window);
3368
3369   if (text_view->top_window)
3370     text_window_unrealize (text_view->top_window);
3371
3372   if (text_view->right_window)
3373     text_window_unrealize (text_view->right_window);
3374
3375   if (text_view->bottom_window)
3376     text_window_unrealize (text_view->bottom_window);
3377
3378   gtk_text_view_destroy_layout (text_view);
3379
3380   (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
3381 }
3382
3383 static void
3384 gtk_text_view_style_set (GtkWidget *widget,
3385                          GtkStyle  *previous_style)
3386 {
3387   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3388
3389   if (GTK_WIDGET_REALIZED (widget))
3390     {
3391       gdk_window_set_background (widget->window,
3392                                  &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3393
3394       gdk_window_set_background (text_view->text_window->bin_window,
3395                                  &widget->style->base[GTK_WIDGET_STATE (widget)]);
3396
3397       if (text_view->left_window)
3398         gdk_window_set_background (text_view->left_window->bin_window,
3399                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3400       if (text_view->right_window)
3401         gdk_window_set_background (text_view->right_window->bin_window,
3402                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3403
3404       if (text_view->top_window)
3405         gdk_window_set_background (text_view->top_window->bin_window,
3406                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3407
3408       if (text_view->bottom_window)
3409         gdk_window_set_background (text_view->bottom_window->bin_window,
3410                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3411
3412       gtk_text_view_realize_cursor_gc (text_view);
3413     }
3414
3415   if (text_view->layout && previous_style)
3416     {
3417       gtk_text_view_set_attributes_from_style (text_view,
3418                                                text_view->layout->default_style,
3419                                                widget->style);
3420       gtk_text_layout_default_style_changed (text_view->layout);
3421     }
3422 }
3423
3424 static void
3425 gtk_text_view_direction_changed (GtkWidget        *widget,
3426                                  GtkTextDirection  previous_direction)
3427 {
3428   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3429
3430   if (text_view->layout)
3431     {
3432       text_view->layout->default_style->direction = gtk_widget_get_direction (widget);
3433       gtk_text_layout_default_style_changed (text_view->layout);
3434     }
3435 }
3436
3437
3438 static void
3439 set_invisible_cursor (GdkWindow *window)
3440 {
3441   GdkBitmap *empty_bitmap;
3442   GdkCursor *cursor;
3443   GdkColor useless;
3444   char invisible_cursor_bits[] = { 0x0 };
3445
3446   useless.red = useless.green = useless.blue = 0;
3447   useless.pixel = 0;
3448
3449   empty_bitmap = gdk_bitmap_create_from_data (window,
3450                                               invisible_cursor_bits,
3451                                               1, 1);
3452
3453   cursor = gdk_cursor_new_from_pixmap (empty_bitmap,
3454                                        empty_bitmap,
3455                                        &useless,
3456                                        &useless, 0, 0);
3457
3458   gdk_window_set_cursor (window, cursor);
3459
3460   gdk_cursor_unref (cursor);
3461
3462   g_object_unref (empty_bitmap);
3463 }
3464
3465 static void
3466 gtk_text_view_obscure_mouse_cursor (GtkTextView *text_view)
3467 {
3468   if (text_view->mouse_cursor_obscured)
3469     return;
3470
3471   set_invisible_cursor (text_view->text_window->bin_window);
3472
3473   text_view->mouse_cursor_obscured = TRUE;
3474 }
3475
3476 /*
3477  * Events
3478  */
3479
3480 static gboolean
3481 get_event_coordinates (GdkEvent *event, gint *x, gint *y)
3482 {
3483   if (event)
3484     switch (event->type)
3485       {
3486       case GDK_MOTION_NOTIFY:
3487         *x = event->motion.x;
3488         *y = event->motion.y;
3489         return TRUE;
3490         break;
3491
3492       case GDK_BUTTON_PRESS:
3493       case GDK_2BUTTON_PRESS:
3494       case GDK_3BUTTON_PRESS:
3495       case GDK_BUTTON_RELEASE:
3496         *x = event->button.x;
3497         *y = event->button.y;
3498         return TRUE;
3499         break;
3500
3501       case GDK_KEY_PRESS:
3502       case GDK_KEY_RELEASE:
3503       case GDK_ENTER_NOTIFY:
3504       case GDK_LEAVE_NOTIFY:
3505       case GDK_PROPERTY_NOTIFY:
3506       case GDK_SELECTION_CLEAR:
3507       case GDK_SELECTION_REQUEST:
3508       case GDK_SELECTION_NOTIFY:
3509       case GDK_PROXIMITY_IN:
3510       case GDK_PROXIMITY_OUT:
3511       case GDK_DRAG_ENTER:
3512       case GDK_DRAG_LEAVE:
3513       case GDK_DRAG_MOTION:
3514       case GDK_DRAG_STATUS:
3515       case GDK_DROP_START:
3516       case GDK_DROP_FINISHED:
3517       default:
3518         return FALSE;
3519         break;
3520       }
3521
3522   return FALSE;
3523 }
3524
3525 static gint
3526 emit_event_on_tags (GtkWidget   *widget,
3527                     GdkEvent    *event,
3528                     GtkTextIter *iter)
3529 {
3530   GSList *tags;
3531   GSList *tmp;
3532   gboolean retval = FALSE;
3533   GtkTextView *text_view;
3534
3535   text_view = GTK_TEXT_VIEW (widget);
3536
3537   tags = gtk_text_iter_get_tags (iter);
3538
3539   tmp = tags;
3540   while (tmp != NULL)
3541     {
3542       GtkTextTag *tag = tmp->data;
3543
3544       if (gtk_text_tag_event (tag, G_OBJECT (widget), event, iter))
3545         {
3546           retval = TRUE;
3547           break;
3548         }
3549
3550       tmp = g_slist_next (tmp);
3551     }
3552
3553   g_slist_free (tags);
3554
3555   return retval;
3556 }
3557
3558 static gint
3559 gtk_text_view_event (GtkWidget *widget, GdkEvent *event)
3560 {
3561   GtkTextView *text_view;
3562   gint x = 0, y = 0;
3563
3564   text_view = GTK_TEXT_VIEW (widget);
3565
3566   if (text_view->layout == NULL ||
3567       get_buffer (text_view) == NULL)
3568     return FALSE;
3569
3570   if (event->any.window != text_view->text_window->bin_window)
3571     return FALSE;
3572
3573   if (get_event_coordinates (event, &x, &y))
3574     {
3575       GtkTextIter iter;
3576
3577       x += text_view->xoffset;
3578       y += text_view->yoffset;
3579
3580       /* FIXME this is slow and we do it twice per event.
3581        * My favorite solution is to have GtkTextLayout cache
3582        * the last couple lookups.
3583        */
3584       gtk_text_layout_get_iter_at_pixel (text_view->layout,
3585                                          &iter,
3586                                          x, y);
3587
3588       return emit_event_on_tags (widget, event, &iter);
3589     }
3590   else if (event->type == GDK_KEY_PRESS ||
3591            event->type == GDK_KEY_RELEASE)
3592     {
3593       GtkTextMark *insert;
3594       GtkTextIter iter;
3595
3596       insert = gtk_text_buffer_get_mark (get_buffer (text_view),
3597                                          "insert");
3598
3599       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
3600
3601       return emit_event_on_tags (widget, event, &iter);
3602     }
3603   else
3604     return FALSE;
3605 }
3606
3607 static gint
3608 gtk_text_view_key_press_event (GtkWidget *widget, GdkEventKey *event)
3609 {
3610   gboolean retval = FALSE;
3611   gboolean obscure = FALSE;
3612   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3613   GtkTextMark *insert;
3614   GtkTextIter iter;
3615
3616   if (text_view->layout == NULL ||
3617       get_buffer (text_view) == NULL)
3618     return FALSE;
3619
3620   insert = gtk_text_buffer_get_insert (get_buffer (text_view));
3621   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
3622   if (gtk_text_iter_can_insert (&iter, text_view->editable) &&
3623       gtk_im_context_filter_keypress (text_view->im_context, event))
3624     {
3625       text_view->need_im_reset = TRUE;
3626       obscure = TRUE;
3627       retval = TRUE;
3628     }
3629   else if (GTK_WIDGET_CLASS (parent_class)->key_press_event &&
3630            GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, event))
3631     retval = TRUE;
3632   else if (event->keyval == GDK_Return ||
3633            event->keyval == GDK_KP_Enter)
3634     {
3635       gtk_text_view_commit_text (text_view, "\n");
3636
3637       obscure = TRUE;
3638       retval = TRUE;
3639     }
3640   /* Pass through Tab as literal tab, unless Control is held down */
3641   else if ((event->keyval == GDK_Tab ||
3642             event->keyval == GDK_KP_Tab) &&
3643            !(event->state & GDK_CONTROL_MASK))
3644     {
3645       /* If the text isn't editable, move the focus instead */
3646       if (text_view->editable)
3647         {
3648           gtk_text_view_commit_text (text_view, "\t");
3649           obscure = TRUE;
3650         }
3651       else
3652         gtk_text_view_move_focus (text_view,
3653                                   (event->state & GDK_SHIFT_MASK) ?
3654                                   GTK_DIR_TAB_BACKWARD: GTK_DIR_TAB_FORWARD);
3655
3656       retval = TRUE;
3657     }
3658   else
3659     retval = FALSE;
3660
3661   if (obscure)
3662     gtk_text_view_obscure_mouse_cursor (text_view);
3663
3664   gtk_text_view_pend_cursor_blink (text_view);
3665
3666   return retval;
3667 }
3668
3669 static gint
3670 gtk_text_view_key_release_event (GtkWidget *widget, GdkEventKey *event)
3671 {
3672   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3673   GtkTextMark *insert;
3674   GtkTextIter iter;
3675
3676   if (text_view->layout == NULL || get_buffer (text_view) == NULL)
3677     return FALSE;
3678
3679   insert = gtk_text_buffer_get_insert (get_buffer (text_view));
3680   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
3681   if (gtk_text_iter_can_insert (&iter, text_view->editable) &&
3682       gtk_im_context_filter_keypress (text_view->im_context, event))
3683     {
3684       text_view->need_im_reset = TRUE;
3685       return TRUE;
3686     }
3687   else
3688     return GTK_WIDGET_CLASS (parent_class)->key_release_event (widget, event);
3689 }
3690
3691 static gint
3692 gtk_text_view_button_press_event (GtkWidget *widget, GdkEventButton *event)
3693 {
3694   GtkTextView *text_view;
3695
3696   text_view = GTK_TEXT_VIEW (widget);
3697
3698   text_view->disable_scroll_on_focus = TRUE;
3699   gtk_widget_grab_focus (widget);
3700   text_view->disable_scroll_on_focus = FALSE;
3701
3702   if (event->window != text_view->text_window->bin_window)
3703     {
3704       /* Remove selection if any. */
3705       gtk_text_view_unselect (text_view);
3706       return FALSE;
3707     }
3708
3709 #if 0
3710   /* debug hack */
3711   if (event->button == 3 && (event->state & GDK_CONTROL_MASK) != 0)
3712     _gtk_text_buffer_spew (GTK_TEXT_VIEW (widget)->buffer);
3713   else if (event->button == 3)
3714     gtk_text_layout_spew (GTK_TEXT_VIEW (widget)->layout);
3715 #endif
3716
3717   if (event->type == GDK_BUTTON_PRESS)
3718     {
3719       gtk_text_view_reset_im_context (text_view);
3720
3721       if (event->button == 1)
3722         {
3723           /* If we're in the selection, start a drag copy/move of the
3724            * selection; otherwise, start creating a new selection.
3725            */
3726           GtkTextIter iter;
3727           GtkTextIter start, end;
3728
3729           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3730                                              &iter,
3731                                              event->x + text_view->xoffset,
3732                                              event->y + text_view->yoffset);
3733
3734           if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
3735                                                     &start, &end) &&
3736               gtk_text_iter_in_range (&iter, &start, &end))
3737             {
3738               text_view->drag_start_x = event->x;
3739               text_view->drag_start_y = event->y;
3740               text_view->pending_place_cursor_button = event->button;
3741             }
3742           else
3743             {
3744               gtk_text_view_start_selection_drag (text_view, &iter, event);
3745             }
3746
3747           return TRUE;
3748         }
3749       else if (event->button == 2)
3750         {
3751           GtkTextIter iter;
3752
3753           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3754                                              &iter,
3755                                              event->x + text_view->xoffset,
3756                                              event->y + text_view->yoffset);
3757
3758           gtk_text_buffer_paste_clipboard (get_buffer (text_view),
3759                                            gtk_clipboard_get (GDK_SELECTION_PRIMARY),
3760                                            &iter,
3761                                            text_view->editable);
3762           return TRUE;
3763         }
3764       else if (event->button == 3)
3765         {
3766           gtk_text_view_do_popup (text_view, event);
3767         }
3768     }
3769   else if ((event->type == GDK_2BUTTON_PRESS ||
3770             event->type == GDK_3BUTTON_PRESS) &&
3771            event->button == 1)
3772     {
3773       GtkTextIter start, end;
3774
3775       /* End the selection drag, otherwise we'd clear the new
3776        * word/line selection on button release
3777        */
3778       gtk_text_view_end_selection_drag (text_view, event);
3779
3780       gtk_text_layout_get_iter_at_pixel (text_view->layout,
3781                                          &start,
3782                                          event->x + text_view->xoffset,
3783                                          event->y + text_view->yoffset);
3784
3785       end = start;
3786
3787       if (event->type == GDK_2BUTTON_PRESS)
3788         {
3789           if (gtk_text_iter_inside_word (&start))
3790             {
3791               if (!gtk_text_iter_starts_word (&start))
3792                 gtk_text_iter_backward_word_start (&start);
3793
3794               if (!gtk_text_iter_ends_word (&end))
3795                 gtk_text_iter_forward_word_end (&end);
3796             }
3797         }
3798       else if (event->type == GDK_3BUTTON_PRESS)
3799         {
3800           if (gtk_text_view_starts_display_line (text_view, &start))
3801             {
3802               /* If on a display line boundary, we assume the user
3803                * clicked off the end of a line and we therefore select
3804                * the line before the boundary.
3805                */
3806               gtk_text_view_backward_display_line_start (text_view, &start);
3807             }
3808           else
3809             {
3810               /* start isn't on the start of a line, so we move it to the
3811                * start, and move end to the end unless it's already there.
3812                */
3813               gtk_text_view_backward_display_line_start (text_view, &start);
3814
3815               if (!gtk_text_view_starts_display_line (text_view, &end))
3816                 gtk_text_view_forward_display_line_end (text_view, &end);
3817             }
3818         }
3819
3820       if (event->state & GDK_SHIFT_MASK)
3821         {
3822           /* Take union of old and new selection */
3823           GtkTextIter old_start, old_end;
3824
3825           gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
3826                                                 &old_start, &old_end);
3827
3828           gtk_text_iter_order (&start, &old_start);
3829           gtk_text_iter_order (&old_end, &end);
3830
3831           /* Now start is the first of the starts, and end is the
3832            * last of the ends
3833            */
3834         }
3835
3836       gtk_text_buffer_move_mark_by_name (get_buffer (text_view),
3837                                          "selection_bound",
3838                                          &start);
3839       gtk_text_buffer_move_mark_by_name (get_buffer (text_view),
3840                                          "insert",
3841                                          &end);
3842
3843       text_view->just_selected_element = TRUE;
3844
3845       return TRUE;
3846     }
3847
3848   return FALSE;
3849 }
3850
3851 static gint
3852 gtk_text_view_button_release_event (GtkWidget *widget, GdkEventButton *event)
3853 {
3854   GtkTextView *text_view;
3855
3856   text_view = GTK_TEXT_VIEW (widget);
3857
3858   if (event->window != text_view->text_window->bin_window)
3859     return FALSE;
3860
3861   if (event->button == 1)
3862     {
3863       if (text_view->drag_start_x >= 0)
3864         {
3865           text_view->drag_start_x = -1;
3866           text_view->drag_start_y = -1;
3867         }
3868
3869       if (gtk_text_view_end_selection_drag (GTK_TEXT_VIEW (widget), event))
3870         return TRUE;
3871       else if (text_view->just_selected_element)
3872         {
3873           text_view->just_selected_element = FALSE;
3874           return FALSE;
3875         }
3876       else if (text_view->pending_place_cursor_button == event->button)
3877         {
3878           GtkTextIter iter;
3879
3880           /* Unselect everything; we clicked inside selection, but
3881            * didn't move by the drag threshold, so just clear selection
3882            * and place cursor.
3883            */
3884           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3885                                              &iter,
3886                                              event->x + text_view->xoffset,
3887                                              event->y + text_view->yoffset);
3888
3889           gtk_text_buffer_place_cursor (get_buffer (text_view), &iter);
3890
3891           text_view->pending_place_cursor_button = 0;
3892
3893           return FALSE;
3894         }
3895     }
3896
3897   return FALSE;
3898 }
3899
3900 static void
3901 keymap_direction_changed (GdkKeymap   *keymap,
3902                           GtkTextView *text_view)
3903 {
3904   gtk_text_view_check_keymap_direction (text_view);
3905 }
3906
3907 static gint
3908 gtk_text_view_focus_in_event (GtkWidget *widget, GdkEventFocus *event)
3909 {
3910   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3911
3912   gtk_widget_queue_draw (widget);
3913
3914   DV(g_print (G_STRLOC": focus_in_event\n"));
3915
3916   if (text_view->cursor_visible && text_view->layout)
3917     {
3918       gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3919       gtk_text_view_check_cursor_blink (text_view);
3920     }
3921
3922   g_signal_connect (gdk_keymap_get_default (),
3923                     "direction_changed",
3924                     G_CALLBACK (keymap_direction_changed), text_view);
3925   gtk_text_view_check_keymap_direction (text_view);
3926
3927   text_view->need_im_reset = TRUE;
3928   gtk_im_context_focus_in (GTK_TEXT_VIEW (widget)->im_context);
3929
3930   return FALSE;
3931 }
3932
3933 static gint
3934 gtk_text_view_focus_out_event (GtkWidget *widget, GdkEventFocus *event)
3935 {
3936   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3937
3938   gtk_widget_queue_draw (widget);
3939
3940   DV(g_print (G_STRLOC": focus_out_event\n"));
3941
3942   if (text_view->cursor_visible && text_view->layout)
3943     {
3944       gtk_text_layout_set_cursor_visible (text_view->layout, FALSE);
3945       gtk_text_view_check_cursor_blink (text_view);
3946     }
3947
3948   g_signal_handlers_disconnect_by_func (gdk_keymap_get_default (),
3949                                         keymap_direction_changed,
3950                                         text_view);
3951
3952   text_view->need_im_reset = TRUE;
3953   gtk_im_context_focus_out (GTK_TEXT_VIEW (widget)->im_context);
3954
3955   return FALSE;
3956 }
3957
3958 static gint
3959 gtk_text_view_motion_event (GtkWidget *widget, GdkEventMotion *event)
3960 {
3961   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3962
3963   if (text_view->mouse_cursor_obscured)
3964     {
3965       GdkCursor *cursor;
3966
3967       cursor = gdk_cursor_new (GDK_XTERM);
3968       gdk_window_set_cursor (text_view->text_window->bin_window, cursor);
3969       gdk_cursor_unref (cursor);
3970       text_view->mouse_cursor_obscured = FALSE;
3971     }
3972
3973   if (event->window == text_view->text_window->bin_window &&
3974       text_view->drag_start_x >= 0)
3975     {
3976       gint x, y;
3977
3978       gdk_window_get_pointer (text_view->text_window->bin_window,
3979                               &x, &y, NULL);
3980
3981       if (gtk_drag_check_threshold (widget,
3982                                     text_view->drag_start_x,
3983                                     text_view->drag_start_y,
3984                                     x, y))
3985         {
3986           GtkTextIter iter;
3987           gint buffer_x, buffer_y;
3988
3989           gtk_text_view_window_to_buffer_coords (text_view,
3990                                                  GTK_TEXT_WINDOW_TEXT,
3991                                                  text_view->drag_start_x,
3992                                                  text_view->drag_start_y,
3993                                                  &buffer_x,
3994                                                  &buffer_y);
3995
3996           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3997                                              &iter,
3998                                              buffer_x, buffer_y);
3999
4000           gtk_text_view_start_selection_dnd (text_view, &iter, event);
4001           return TRUE;
4002         }
4003     }
4004
4005   return FALSE;
4006 }
4007
4008 static void
4009 gtk_text_view_paint (GtkWidget      *widget,
4010                      GdkRectangle   *area,
4011                      GdkEventExpose *event)
4012 {
4013   GtkTextView *text_view;
4014   GList *child_exposes;
4015   GList *tmp_list;
4016   GdkRegion *updates;
4017
4018   text_view = GTK_TEXT_VIEW (widget);
4019
4020   g_return_if_fail (text_view->layout != NULL);
4021   g_return_if_fail (text_view->xoffset >= 0);
4022   g_return_if_fail (text_view->yoffset >= 0);
4023
4024   while (text_view->first_validate_idle != 0)
4025     {
4026       DV (g_print (G_STRLOC": first_validate_idle: %d\n",
4027                    text_view->first_validate_idle));
4028       gtk_text_view_flush_first_validate (text_view);
4029     }
4030
4031   /* More regions could have become invalid in the above loop */
4032   updates = gdk_window_get_update_area (text_view->text_window->bin_window);
4033   if (updates)
4034     {
4035       GdkRectangle rect;
4036
4037       gdk_region_get_clipbox (updates, &rect);
4038
4039       gdk_rectangle_union (area, &rect, area);
4040
4041       gdk_region_destroy (updates);
4042     }
4043
4044   if (!text_view->onscreen_validated)
4045     {
4046       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.");
4047       G_BREAKPOINT ();
4048     }
4049
4050 #if 0
4051   printf ("painting %d,%d  %d x %d\n",
4052           area->x, area->y,
4053           area->width, area->height);
4054 #endif
4055
4056   child_exposes = NULL;
4057   gtk_text_layout_draw (text_view->layout,
4058                         widget,
4059                         text_view->text_window->bin_window,
4060                         text_view->cursor_gc,
4061                         text_view->xoffset,
4062                         text_view->yoffset,
4063                         area->x, area->y,
4064                         area->width, area->height,
4065                         &child_exposes);
4066
4067   tmp_list = child_exposes;
4068   while (tmp_list != NULL)
4069     {
4070       GtkWidget *child = tmp_list->data;
4071
4072       gtk_container_propagate_expose (GTK_CONTAINER (text_view),
4073                                       child,
4074                                       event);
4075
4076       g_object_unref (G_OBJECT (child));
4077
4078       tmp_list = tmp_list->next;
4079     }
4080
4081   g_list_free (child_exposes);
4082 }
4083
4084 static gint
4085 gtk_text_view_expose_event (GtkWidget *widget, GdkEventExpose *event)
4086 {
4087   GSList *tmp_list;
4088
4089   if (event->window == gtk_text_view_get_window (GTK_TEXT_VIEW (widget),
4090                                                  GTK_TEXT_WINDOW_TEXT))
4091     {
4092       DV(g_print (">Exposed ("G_STRLOC")\n"));
4093       gtk_text_view_paint (widget, &event->area, event);
4094     }
4095
4096   if (event->window == widget->window)
4097     gtk_text_view_draw_focus (widget);
4098
4099   /* Propagate exposes to all children not in the buffer. */
4100   tmp_list = GTK_TEXT_VIEW (widget)->children;
4101   while (tmp_list != NULL)
4102     {
4103       GtkTextViewChild *vc = tmp_list->data;
4104
4105       /* propagate_expose checks that event->window matches
4106        * child->window
4107        */
4108       if (vc->type != GTK_TEXT_WINDOW_TEXT)
4109         gtk_container_propagate_expose (GTK_CONTAINER (widget),
4110                                         vc->widget,
4111                                         event);
4112
4113       tmp_list = tmp_list->next;
4114     }
4115
4116   return FALSE;
4117 }
4118
4119 static void
4120 gtk_text_view_draw_focus (GtkWidget *widget)
4121 {
4122   gboolean interior_focus;
4123
4124   /* We clear the focus if we are in interior focus mode. */
4125   gtk_widget_style_get (widget,
4126                         "interior_focus", &interior_focus,
4127                         NULL);
4128
4129   if (GTK_WIDGET_DRAWABLE (widget))
4130     {
4131       if (GTK_WIDGET_HAS_FOCUS (widget) && !interior_focus)
4132         {
4133           gtk_paint_focus (widget->style, widget->window, GTK_WIDGET_STATE (widget),
4134                            NULL, widget, "textview",
4135                            0, 0,
4136                            widget->allocation.width,
4137                            widget->allocation.height);
4138         }
4139       else
4140         {
4141           gdk_window_clear (widget->window);
4142         }
4143     }
4144 }
4145
4146 static void
4147 gtk_text_view_grab_focus (GtkWidget *widget)
4148 {
4149   GtkTextView *text_view;
4150
4151   text_view = GTK_TEXT_VIEW (widget);
4152
4153   GTK_WIDGET_CLASS (parent_class)->grab_focus (widget);
4154
4155   if (!text_view->disable_scroll_on_focus)
4156     gtk_text_view_scroll_mark_onscreen (text_view,
4157                                         gtk_text_buffer_get_mark (get_buffer (text_view),
4158                                                                   "insert"));
4159 }
4160
4161 static gboolean
4162 gtk_text_view_focus (GtkWidget        *widget,
4163                      GtkDirectionType  direction)
4164 {
4165   GtkTextView *text_view;
4166   GtkContainer *container;
4167
4168   text_view = GTK_TEXT_VIEW (widget);
4169   container = GTK_CONTAINER (widget);
4170
4171   return GTK_WIDGET_CLASS (parent_class)->focus (widget, direction);
4172 }
4173
4174 /*
4175  * Container
4176  */
4177
4178 static void
4179 gtk_text_view_add (GtkContainer *container,
4180                    GtkWidget    *child)
4181 {
4182   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
4183   g_return_if_fail (GTK_IS_WIDGET (child));
4184
4185   /* This is pretty random. */
4186   gtk_text_view_add_child_in_window (GTK_TEXT_VIEW (container),
4187                                      child,
4188                                      GTK_TEXT_WINDOW_WIDGET,
4189                                      0, 0);
4190 }
4191
4192 static void
4193 gtk_text_view_remove (GtkContainer *container,
4194                       GtkWidget    *child)
4195 {
4196   GSList *iter;
4197   GtkTextView *text_view;
4198   GtkTextViewChild *vc;
4199
4200   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
4201   g_return_if_fail (GTK_IS_WIDGET (child));
4202   g_return_if_fail (child->parent == (GtkWidget*) container);
4203
4204   text_view = GTK_TEXT_VIEW (container);
4205
4206   vc = NULL;
4207   iter = text_view->children;
4208
4209   while (iter != NULL)
4210     {
4211       vc = iter->data;
4212
4213       if (vc->widget == child)
4214         break;
4215
4216       iter = g_slist_next (iter);
4217     }
4218
4219   g_assert (iter != NULL); /* be sure we had the child in the list */
4220
4221   text_view->children = g_slist_remove (text_view->children, vc);
4222
4223   gtk_widget_unparent (vc->widget);
4224
4225   text_view_child_free (vc);
4226 }
4227
4228 static void
4229 gtk_text_view_forall (GtkContainer *container,
4230                       gboolean      include_internals,
4231                       GtkCallback   callback,
4232                       gpointer      callback_data)
4233 {
4234   GSList *iter;
4235   GtkTextView *text_view;
4236   GSList *copy;
4237
4238   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
4239   g_return_if_fail (callback != NULL);
4240
4241   text_view = GTK_TEXT_VIEW (container);
4242
4243   copy = g_slist_copy (text_view->children);
4244   iter = copy;
4245
4246   while (iter != NULL)
4247     {
4248       GtkTextViewChild *vc = iter->data;
4249
4250       (* callback) (vc->widget, callback_data);
4251
4252       iter = g_slist_next (iter);
4253     }
4254
4255   g_slist_free (copy);
4256 }
4257
4258 #define CURSOR_ON_MULTIPLIER 0.66
4259 #define CURSOR_OFF_MULTIPLIER 0.34
4260 #define CURSOR_PEND_MULTIPLIER 1.0
4261
4262 static gboolean
4263 cursor_blinks (GtkTextView *text_view)
4264 {
4265   GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
4266   gboolean blink;
4267
4268 #ifdef DEBUG_VALIDATION_AND_SCROLLING
4269   return FALSE;
4270 #endif
4271   if (gtk_debug_flags & GTK_DEBUG_UPDATES)
4272     return FALSE;
4273
4274   g_object_get (G_OBJECT (settings), "gtk-cursor-blink", &blink, NULL);
4275   return blink;
4276 }
4277
4278 static gint
4279 get_cursor_time (GtkTextView *text_view)
4280 {
4281   GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
4282   gint time;
4283
4284   g_object_get (G_OBJECT (settings), "gtk-cursor-blink-time", &time, NULL);
4285
4286   return time;
4287 }
4288
4289 /*
4290  * Blink!
4291  */
4292
4293 static gint
4294 blink_cb (gpointer data)
4295 {
4296   GtkTextView *text_view;
4297   gboolean visible;
4298
4299   GDK_THREADS_ENTER ();
4300
4301   text_view = GTK_TEXT_VIEW (data);
4302
4303   g_assert (text_view->layout);
4304   g_assert (GTK_WIDGET_HAS_FOCUS (text_view));
4305   g_assert (text_view->cursor_visible);
4306
4307   visible = gtk_text_layout_get_cursor_visible (text_view->layout);
4308
4309   if (visible)
4310     text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_OFF_MULTIPLIER,
4311                                                 blink_cb,
4312                                                 text_view);
4313   else
4314     text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_ON_MULTIPLIER,
4315                                                 blink_cb,
4316                                                 text_view);
4317
4318   gtk_text_layout_set_cursor_visible (text_view->layout,
4319                                       !visible);
4320
4321   GDK_THREADS_LEAVE ();
4322
4323   /* Remove ourselves */
4324   return FALSE;
4325 }
4326
4327
4328 static void
4329 gtk_text_view_stop_cursor_blink (GtkTextView *text_view)
4330 {
4331   if (text_view->blink_timeout)
4332     {
4333       gtk_timeout_remove (text_view->blink_timeout);
4334       text_view->blink_timeout = 0;
4335     }
4336 }
4337
4338 static void
4339 gtk_text_view_check_cursor_blink (GtkTextView *text_view)
4340 {
4341   if (text_view->layout != NULL &&
4342       text_view->cursor_visible &&
4343       GTK_WIDGET_HAS_FOCUS (text_view))
4344     {
4345       if (cursor_blinks (text_view))
4346         {
4347           if (text_view->blink_timeout == 0)
4348             {
4349               gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
4350
4351               text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_OFF_MULTIPLIER,
4352                                                           blink_cb,
4353                                                           text_view);
4354             }
4355         }
4356       else
4357         gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
4358     }
4359   else
4360     {
4361       gtk_text_view_stop_cursor_blink (text_view);
4362     }
4363 }
4364
4365 static void
4366 gtk_text_view_pend_cursor_blink(GtkTextView *text_view)
4367 {
4368   if (text_view->layout != NULL &&
4369       text_view->cursor_visible &&
4370       GTK_WIDGET_HAS_FOCUS (text_view) &&
4371       cursor_blinks (text_view))
4372     {
4373       if (text_view->blink_timeout != 0)
4374         {
4375           gtk_timeout_remove (text_view->blink_timeout);
4376           text_view->blink_timeout = 0;
4377         }
4378
4379       gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
4380
4381       text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_PEND_MULTIPLIER,
4382                                                   blink_cb,
4383                                                   text_view);
4384     }
4385 }
4386
4387
4388 /*
4389  * Key binding handlers
4390  */
4391
4392 static void
4393 gtk_text_view_move_iter_by_lines (GtkTextView *text_view,
4394                                   GtkTextIter *newplace,
4395                                   gint         count)
4396 {
4397   while (count < 0)
4398     {
4399       gtk_text_layout_move_iter_to_previous_line (text_view->layout, newplace);
4400       count++;
4401     }
4402
4403   while (count > 0)
4404     {
4405       gtk_text_layout_move_iter_to_next_line (text_view->layout, newplace);
4406       count--;
4407     }
4408 }
4409
4410 /* FIXME when we are unfrozen and can change GtkMovementStep,
4411  * fix this
4412  */
4413 #define PAGE_HORIZONTALLY_HACK_VALUE 57
4414
4415 static void
4416 gtk_text_view_move_cursor_internal (GtkTextView     *text_view,
4417                                     GtkMovementStep  step,
4418                                     gint             count,
4419                                     gboolean         extend_selection)
4420 {
4421   GtkTextIter insert;
4422   GtkTextIter newplace;
4423
4424   gint cursor_x_pos = 0;
4425
4426   gtk_text_view_reset_im_context (text_view);
4427
4428   if (step == GTK_MOVEMENT_PAGES)
4429     {
4430       gtk_text_view_scroll_pages (text_view, count);
4431       gtk_text_view_pend_cursor_blink (text_view);
4432       return;
4433     }
4434   else if (step == PAGE_HORIZONTALLY_HACK_VALUE)
4435     {
4436       gtk_text_view_scroll_hpages (text_view, count);
4437       gtk_text_view_pend_cursor_blink (text_view);
4438       return;
4439     }
4440
4441   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
4442                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4443                                                               "insert"));
4444   newplace = insert;
4445
4446   if (step == GTK_MOVEMENT_DISPLAY_LINES)
4447     gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, NULL);
4448
4449   switch (step)
4450     {
4451     case GTK_MOVEMENT_LOGICAL_POSITIONS:
4452       gtk_text_iter_forward_cursor_positions (&newplace, count);
4453       break;
4454
4455     case GTK_MOVEMENT_VISUAL_POSITIONS:
4456       gtk_text_layout_move_iter_visually (text_view->layout,
4457                                           &newplace, count);
4458       break;
4459
4460     case GTK_MOVEMENT_WORDS:
4461       if (count < 0)
4462         gtk_text_iter_backward_word_starts (&newplace, -count);
4463       else if (count > 0)
4464         gtk_text_iter_forward_word_ends (&newplace, count);
4465       break;
4466
4467     case GTK_MOVEMENT_DISPLAY_LINES:
4468       gtk_text_view_move_iter_by_lines (text_view, &newplace, count);
4469       gtk_text_layout_move_iter_to_x (text_view->layout, &newplace, cursor_x_pos);
4470       break;
4471
4472     case GTK_MOVEMENT_DISPLAY_LINE_ENDS:
4473       if (count > 1)
4474         gtk_text_view_move_iter_by_lines (text_view, &newplace, --count);
4475       else if (count < -1)
4476         gtk_text_view_move_iter_by_lines (text_view, &newplace, ++count);
4477
4478       if (count != 0)
4479         gtk_text_layout_move_iter_to_line_end (text_view->layout, &newplace, count);
4480       break;
4481
4482     case GTK_MOVEMENT_PARAGRAPHS:
4483       if (count > 0)
4484         {
4485           if (!gtk_text_iter_ends_line (&newplace))
4486             {
4487               gtk_text_iter_forward_to_line_end (&newplace);
4488               --count;
4489             }
4490         }
4491       else if (count < 0)
4492         {
4493           if (gtk_text_iter_get_line_offset (&newplace) > 0)
4494             {
4495               gtk_text_iter_set_line_offset (&newplace, 0);
4496               ++count;
4497             }
4498         }
4499
4500       if (count != 0)
4501         {
4502           gtk_text_iter_forward_lines (&newplace, count);
4503           gtk_text_iter_set_line_offset (&newplace, 0);
4504         }
4505       break;
4506
4507     case GTK_MOVEMENT_PARAGRAPH_ENDS:
4508       if (count > 0)
4509         {
4510           if (!gtk_text_iter_ends_line (&newplace))
4511             gtk_text_iter_forward_to_line_end (&newplace);
4512         }
4513       else if (count < 0)
4514         {
4515           gtk_text_iter_set_line_offset (&newplace, 0);
4516         }
4517       break;
4518
4519     case GTK_MOVEMENT_BUFFER_ENDS:
4520       if (count > 0)
4521         gtk_text_buffer_get_end_iter (get_buffer (text_view), &newplace);
4522       else if (count < 0)
4523         gtk_text_buffer_get_iter_at_offset (get_buffer (text_view), &newplace, 0);
4524       break;
4525
4526     default:
4527       break;
4528     }
4529
4530   if (!gtk_text_iter_equal (&insert, &newplace))
4531     {
4532       if (extend_selection)
4533         gtk_text_buffer_move_mark (get_buffer (text_view),
4534                                    gtk_text_buffer_get_mark (get_buffer (text_view),
4535                                                              "insert"),
4536                                    &newplace);
4537       else
4538         gtk_text_buffer_place_cursor (get_buffer (text_view), &newplace);
4539
4540       DV(g_print (G_STRLOC": scrolling onscreen\n"));
4541       gtk_text_view_scroll_mark_onscreen (text_view,
4542                                           gtk_text_buffer_get_mark (get_buffer (text_view),
4543                                                                     "insert"));
4544
4545       if (step == GTK_MOVEMENT_DISPLAY_LINES)
4546         {
4547           gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, -1);
4548         }
4549     }
4550
4551   gtk_text_view_pend_cursor_blink (text_view);
4552 }
4553
4554 static void
4555 gtk_text_view_move_cursor (GtkTextView     *text_view,
4556                            GtkMovementStep  step,
4557                            gint             count,
4558                            gboolean         extend_selection)
4559 {
4560   gtk_text_view_move_cursor_internal (text_view, step, count, extend_selection);
4561 }
4562
4563 static void
4564 gtk_text_view_page_horizontally (GtkTextView     *text_view,
4565                                  gint             count,
4566                                  gboolean         extend_selection)
4567 {
4568   gtk_text_view_move_cursor_internal (text_view, PAGE_HORIZONTALLY_HACK_VALUE,
4569                                       count, extend_selection);
4570 }
4571
4572 static void
4573 gtk_text_view_set_anchor (GtkTextView *text_view)
4574 {
4575   GtkTextIter insert;
4576
4577   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
4578                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4579                                                               "insert"));
4580
4581   gtk_text_buffer_create_mark (get_buffer (text_view), "anchor", &insert, TRUE);
4582 }
4583
4584 static void
4585 gtk_text_view_scroll_pages (GtkTextView *text_view,
4586                             gint         count)
4587 {
4588   gdouble newval;
4589   gdouble oldval;
4590   GtkAdjustment *adj;
4591   gint cursor_x_pos, cursor_y_pos;
4592   GtkTextIter new_insert;
4593   GtkTextIter anchor;
4594   gint y0, y1;
4595
4596   g_return_if_fail (text_view->vadjustment != NULL);
4597
4598   adj = text_view->vadjustment;
4599
4600   /* Validate the region that will be brought into view by the cursor motion
4601    */
4602   if (count < 0)
4603     {
4604       gtk_text_view_get_first_para_iter (text_view, &anchor);
4605       y0 = adj->page_size;
4606       y1 = adj->page_size + count * adj->page_increment;
4607     }
4608   else
4609     {
4610       gtk_text_view_get_first_para_iter (text_view, &anchor);
4611       y0 = count * adj->page_increment + adj->page_size;
4612       y1 = 0;
4613     }
4614
4615   gtk_text_layout_validate_yrange (text_view->layout, &anchor, y0, y1);
4616   /* FIXME do we need to update the adjustment ranges here? */
4617
4618   if (count < 0 && adj->value <= (adj->lower + 1e-12))
4619     {
4620       /* already at top, just be sure we are at offset 0 */
4621       gtk_text_buffer_get_start_iter (get_buffer (text_view), &new_insert);
4622       gtk_text_buffer_place_cursor (get_buffer (text_view), &new_insert);
4623     }
4624   else if (count > 0 && adj->value >= (adj->upper - adj->page_size - 1e-12))
4625     {
4626       /* already at bottom, just be sure we are at the end */
4627       gtk_text_buffer_get_end_iter (get_buffer (text_view), &new_insert);
4628       gtk_text_buffer_place_cursor (get_buffer (text_view), &new_insert);
4629     }
4630   else
4631     {
4632       gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, &cursor_y_pos);
4633
4634       newval = adj->value;
4635       oldval = adj->value;
4636
4637       newval += count * adj->page_increment;
4638
4639       set_adjustment_clamped (adj, newval);
4640       cursor_y_pos += adj->value - oldval;
4641
4642       gtk_text_layout_get_iter_at_pixel (text_view->layout, &new_insert, cursor_x_pos, cursor_y_pos);
4643       clamp_iter_onscreen (text_view, &new_insert);
4644       gtk_text_buffer_place_cursor (get_buffer (text_view), &new_insert);
4645
4646       gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, cursor_y_pos);
4647     }
4648
4649   /* Adjust to have the cursor _entirely_ onscreen, move_mark_onscreen
4650    * only guarantees 1 pixel onscreen.
4651    */
4652   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4653   gtk_text_view_scroll_mark_onscreen (text_view,
4654                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4655                                                                 "insert"));
4656 }
4657
4658 static void
4659 gtk_text_view_scroll_hpages (GtkTextView *text_view,
4660                              gint         count)
4661 {
4662   gdouble newval;
4663   gdouble oldval;
4664   GtkAdjustment *adj;
4665   gint cursor_x_pos, cursor_y_pos;
4666   GtkTextIter new_insert;
4667   gint y, height;
4668
4669   g_return_if_fail (text_view->hadjustment != NULL);
4670
4671   adj = text_view->hadjustment;
4672
4673   /* Validate the line that we're moving within.
4674    */
4675   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4676                                     &new_insert,
4677                                     gtk_text_buffer_get_mark (get_buffer (text_view), "insert"));
4678   gtk_text_layout_get_line_yrange (text_view->layout, &new_insert, &y, &height);
4679   gtk_text_layout_validate_yrange (text_view->layout, &new_insert, y, y + height);
4680   /* FIXME do we need to update the adjustment ranges here? */
4681
4682   if (count < 0 && adj->value <= (adj->lower + 1e-12))
4683     {
4684       /* already at far left, just be sure we are at offset 0 */
4685       gtk_text_iter_set_line_offset (&new_insert, 0);
4686       gtk_text_buffer_place_cursor (get_buffer (text_view), &new_insert);
4687     }
4688   else if (count > 0 && adj->value >= (adj->upper - adj->page_size - 1e-12))
4689     {
4690       /* already at far right, just be sure we are at the end */
4691       gtk_text_iter_forward_to_line_end (&new_insert);
4692       gtk_text_buffer_place_cursor (get_buffer (text_view), &new_insert);
4693     }
4694   else
4695     {
4696       gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, &cursor_y_pos);
4697
4698       newval = adj->value;
4699       oldval = adj->value;
4700
4701       newval += count * adj->page_increment;
4702
4703       set_adjustment_clamped (adj, newval);
4704       cursor_x_pos += adj->value - oldval;
4705
4706       gtk_text_layout_get_iter_at_pixel (text_view->layout, &new_insert, cursor_x_pos, cursor_y_pos);
4707       clamp_iter_onscreen (text_view, &new_insert);
4708       gtk_text_buffer_place_cursor (get_buffer (text_view), &new_insert);
4709
4710       gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, cursor_y_pos);
4711     }
4712
4713   /*  FIXME for lines shorter than the overall widget width, this results in a
4714    *  "bounce" effect as we scroll to the right of the widget, then scroll
4715    *  back to get the end of the line onscreen.
4716    *      http://bugzilla.gnome.org/show_bug.cgi?id=68963
4717    */
4718
4719   /* Adjust to have the cursor _entirely_ onscreen, move_mark_onscreen
4720    * only guarantees 1 pixel onscreen.
4721    */
4722   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4723   gtk_text_view_scroll_mark_onscreen (text_view,
4724                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4725                                                                 "insert"));
4726 }
4727
4728 static gboolean
4729 whitespace (gunichar ch, gpointer user_data)
4730 {
4731   return (ch == ' ' || ch == '\t');
4732 }
4733
4734 static gboolean
4735 not_whitespace (gunichar ch, gpointer user_data)
4736 {
4737   return !whitespace (ch, user_data);
4738 }
4739
4740 static gboolean
4741 find_whitepace_region (const GtkTextIter *center,
4742                        GtkTextIter *start, GtkTextIter *end)
4743 {
4744   *start = *center;
4745   *end = *center;
4746
4747   if (gtk_text_iter_backward_find_char (start, not_whitespace, NULL, NULL))
4748     gtk_text_iter_forward_char (start); /* we want the first whitespace... */
4749   if (whitespace (gtk_text_iter_get_char (end), NULL))
4750     gtk_text_iter_forward_find_char (end, not_whitespace, NULL, NULL);
4751
4752   return !gtk_text_iter_equal (start, end);
4753 }
4754
4755 static void
4756 gtk_text_view_insert_at_cursor (GtkTextView *text_view,
4757                                 const gchar *str)
4758 {
4759   gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
4760                                                 text_view->editable);
4761 }
4762
4763 static void
4764 gtk_text_view_delete_from_cursor (GtkTextView   *text_view,
4765                                   GtkDeleteType  type,
4766                                   gint           count)
4767 {
4768   GtkTextIter insert;
4769   GtkTextIter start;
4770   GtkTextIter end;
4771   gboolean leave_one = FALSE;
4772
4773   gtk_text_view_reset_im_context (text_view);
4774
4775   if (type == GTK_DELETE_CHARS)
4776     {
4777       /* Char delete deletes the selection, if one exists */
4778       if (gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
4779                                             text_view->editable))
4780         return;
4781     }
4782
4783   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4784                                     &insert,
4785                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4786                                                               "insert"));
4787
4788   start = insert;
4789   end = insert;
4790
4791   switch (type)
4792     {
4793     case GTK_DELETE_CHARS:
4794       gtk_text_iter_forward_cursor_positions (&end, count);
4795       break;
4796
4797     case GTK_DELETE_WORD_ENDS:
4798       if (count > 0)
4799         gtk_text_iter_forward_word_ends (&end, count);
4800       else if (count < 0)
4801         gtk_text_iter_backward_word_starts (&start, 0 - count);
4802       break;
4803
4804     case GTK_DELETE_WORDS:
4805       break;
4806
4807     case GTK_DELETE_DISPLAY_LINE_ENDS:
4808       break;
4809
4810     case GTK_DELETE_DISPLAY_LINES:
4811       break;
4812
4813     case GTK_DELETE_PARAGRAPH_ENDS:
4814       /* If we're already at a newline, we need to
4815        * simply delete that newline, instead of
4816        * moving to the next one.
4817        */
4818       if (gtk_text_iter_ends_line (&end))
4819         {
4820           gtk_text_iter_forward_line (&end);
4821           --count;
4822         }
4823
4824       while (count > 0)
4825         {
4826           if (!gtk_text_iter_forward_to_line_end (&end))
4827             break;
4828
4829           --count;
4830         }
4831
4832       /* FIXME figure out what a negative count means
4833          and support that */
4834       break;
4835
4836     case GTK_DELETE_PARAGRAPHS:
4837       if (count > 0)
4838         {
4839           gtk_text_iter_set_line_offset (&start, 0);
4840           gtk_text_iter_forward_to_line_end (&end);
4841
4842           /* Do the lines beyond the first. */
4843           while (count > 1)
4844             {
4845               gtk_text_iter_forward_to_line_end (&end);
4846
4847               --count;
4848             }
4849         }
4850
4851       /* FIXME negative count? */
4852
4853       break;
4854
4855     case GTK_DELETE_WHITESPACE:
4856       {
4857         find_whitepace_region (&insert, &start, &end);
4858       }
4859       break;
4860
4861     default:
4862       break;
4863     }
4864
4865   if (!gtk_text_iter_equal (&start, &end))
4866     {
4867       gtk_text_buffer_begin_user_action (get_buffer (text_view));
4868
4869       if (gtk_text_buffer_delete_interactive (get_buffer (text_view), &start, &end,
4870                                               text_view->editable))
4871         {
4872           if (leave_one)
4873             gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view),
4874                                                           " ", 1,
4875                                                           text_view->editable);
4876         }
4877
4878       gtk_text_buffer_end_user_action (get_buffer (text_view));
4879
4880       DV(g_print (G_STRLOC": scrolling onscreen\n"));
4881       gtk_text_view_scroll_mark_onscreen (text_view,
4882                                           gtk_text_buffer_get_mark (get_buffer (text_view), "insert"));
4883     }
4884 }
4885
4886 static void
4887 gtk_text_view_cut_clipboard (GtkTextView *text_view)
4888 {
4889   gtk_text_buffer_cut_clipboard (get_buffer (text_view),
4890                                  gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
4891                                  text_view->editable);
4892   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4893   gtk_text_view_scroll_mark_onscreen (text_view,
4894                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4895                                                                 "insert"));
4896 }
4897
4898 static void
4899 gtk_text_view_copy_clipboard (GtkTextView *text_view)
4900 {
4901   gtk_text_buffer_copy_clipboard (get_buffer (text_view),
4902                                   gtk_clipboard_get (GDK_SELECTION_CLIPBOARD));
4903   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4904   gtk_text_view_scroll_mark_onscreen (text_view,
4905                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4906                                                                 "insert"));
4907 }
4908
4909 static void
4910 gtk_text_view_paste_clipboard (GtkTextView *text_view)
4911 {
4912   gtk_text_buffer_paste_clipboard (get_buffer (text_view),
4913                                    gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
4914                                    NULL,
4915                                    text_view->editable);
4916   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4917   gtk_text_view_scroll_mark_onscreen (text_view,
4918                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4919                                                                 "insert"));
4920 }
4921
4922 static void
4923 gtk_text_view_toggle_overwrite (GtkTextView *text_view)
4924 {
4925   text_view->overwrite_mode = !text_view->overwrite_mode;
4926 }
4927
4928 static void
4929 gtk_text_view_move_focus (GtkTextView     *text_view,
4930                           GtkDirectionType direction_type)
4931 {
4932   GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (text_view));
4933
4934   if (!GTK_WIDGET_TOPLEVEL (toplevel))
4935     return;
4936
4937   /* Propagate to toplevel */
4938   g_signal_emit_by_name (G_OBJECT (toplevel), "move_focus", direction_type);
4939 }
4940
4941 /*
4942  * Selections
4943  */
4944
4945 static void
4946 gtk_text_view_unselect (GtkTextView *text_view)
4947 {
4948   GtkTextIter insert;
4949
4950   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4951                                     &insert,
4952                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4953                                                               "insert"));
4954
4955   gtk_text_buffer_move_mark (get_buffer (text_view),
4956                              gtk_text_buffer_get_mark (get_buffer (text_view),
4957                                                        "selection_bound"),
4958                              &insert);
4959 }
4960
4961 static void
4962 move_mark_to_pointer_and_scroll (GtkTextView *text_view,
4963                                  const gchar *mark_name)
4964 {
4965   gint x, y;
4966   GdkModifierType state;
4967   GtkTextIter newplace;
4968
4969   /*   DV(g_print (G_STRLOC": begin\n")); */
4970
4971   gdk_window_get_pointer (text_view->text_window->bin_window,
4972                           &x, &y, &state);
4973
4974   /*   DV(g_print (G_STRLOC": get iter at pixel\n"); */
4975   gtk_text_layout_get_iter_at_pixel (text_view->layout,
4976                                      &newplace,
4977                                      x + text_view->xoffset,
4978                                      y + text_view->yoffset);
4979
4980   {
4981     GtkTextMark *mark =
4982       gtk_text_buffer_get_mark (get_buffer (text_view), mark_name);
4983
4984     /* This may invalidate the layout */
4985     DV(g_print (G_STRLOC": move mark\n"));
4986     gtk_text_buffer_move_mark (get_buffer (text_view),
4987                                mark,
4988                                &newplace);
4989
4990     DV(g_print (G_STRLOC": scrolling onscreen\n"));
4991     gtk_text_view_scroll_mark_onscreen (text_view, mark);
4992   }
4993
4994   DV (g_print ("first validate idle leaving %s is %d\n",
4995                G_STRLOC, text_view->first_validate_idle));
4996 }
4997
4998 static gint
4999 selection_scan_timeout (gpointer data)
5000 {
5001   GtkTextView *text_view;
5002
5003   GDK_THREADS_ENTER ();
5004
5005   text_view = GTK_TEXT_VIEW (data);
5006
5007   DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
5008   move_mark_to_pointer_and_scroll (text_view, "insert");
5009
5010   GDK_THREADS_LEAVE ();
5011
5012   return TRUE; /* remain installed. */
5013 }
5014
5015 #define DND_SCROLL_MARGIN 0.20
5016
5017 static gint
5018 drag_scan_timeout (gpointer data)
5019 {
5020   GtkTextView *text_view;
5021   gint x, y;
5022   GdkModifierType state;
5023   GtkTextIter newplace;
5024
5025   GDK_THREADS_ENTER ();
5026
5027   text_view = GTK_TEXT_VIEW (data);
5028
5029   gdk_window_get_pointer (text_view->text_window->bin_window,
5030                           &x, &y, &state);
5031
5032   gtk_text_layout_get_iter_at_pixel (text_view->layout,
5033                                      &newplace,
5034                                      x + text_view->xoffset,
5035                                      y + text_view->yoffset);
5036
5037   gtk_text_buffer_move_mark (get_buffer (text_view),
5038                              text_view->dnd_mark,
5039                              &newplace);
5040
5041   DV(g_print (G_STRLOC": scrolling onscreen\n"));
5042   gtk_text_view_scroll_to_mark (text_view,
5043                                 text_view->dnd_mark,
5044                                 DND_SCROLL_MARGIN, FALSE, 0.0, 0.0);
5045
5046   GDK_THREADS_LEAVE ();
5047
5048   return TRUE;
5049 }
5050
5051 static gint
5052 selection_motion_event_handler (GtkTextView *text_view, GdkEventMotion *event, gpointer data)
5053 {
5054   DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
5055   move_mark_to_pointer_and_scroll (text_view, "insert");
5056
5057   /* If we had to scroll offscreen, insert a timeout to do so
5058    * again. Note that in the timeout, even if the mouse doesn't
5059    * move, due to this scroll xoffset/yoffset will have changed
5060    * and we'll need to scroll again.
5061    */
5062   if (text_view->scroll_timeout != 0) /* reset on every motion event */
5063     gtk_timeout_remove (text_view->scroll_timeout);
5064
5065   text_view->scroll_timeout =
5066     gtk_timeout_add (50, selection_scan_timeout, text_view);
5067
5068   return TRUE;
5069 }
5070
5071 static void
5072 gtk_text_view_start_selection_drag (GtkTextView       *text_view,
5073                                     const GtkTextIter *iter,
5074                                     GdkEventButton    *button)
5075 {
5076   GtkTextIter newplace;
5077   GtkTextBuffer *buffer;
5078
5079   g_return_if_fail (text_view->selection_drag_handler == 0);
5080
5081   gtk_grab_add (GTK_WIDGET (text_view));
5082
5083   buffer = get_buffer (text_view);
5084
5085   newplace = *iter;
5086
5087   if (button->state & GDK_SHIFT_MASK)
5088     {
5089       /* Extend selection */
5090       GtkTextIter start, end;
5091
5092       gtk_text_buffer_get_selection_bounds (buffer, &start, &end);
5093
5094       if (gtk_text_iter_compare (&newplace, &start) <= 0)
5095         {
5096           gtk_text_buffer_move_mark_by_name (buffer, "insert",
5097                                              &newplace);
5098
5099           gtk_text_buffer_move_mark_by_name (buffer, "selection_bound",
5100                                              &end);
5101         }
5102       else if (gtk_text_iter_compare (&newplace, &end) >= 0)
5103         {
5104           gtk_text_buffer_move_mark_by_name (buffer, "insert",
5105                                              &newplace);
5106
5107           gtk_text_buffer_move_mark_by_name (buffer, "selection_bound",
5108                                              &start);
5109         }
5110     }
5111   else
5112     {
5113       /* Replace selection */
5114       gtk_text_buffer_place_cursor (buffer, &newplace);
5115     }
5116
5117   text_view->selection_drag_handler = gtk_signal_connect (GTK_OBJECT (text_view),
5118                                                           "motion_notify_event",
5119                                                           GTK_SIGNAL_FUNC (selection_motion_event_handler),
5120                                                           NULL);
5121 }
5122
5123 /* returns whether we were really dragging */
5124 static gboolean
5125 gtk_text_view_end_selection_drag (GtkTextView *text_view, GdkEventButton *event)
5126 {
5127   if (text_view->selection_drag_handler == 0)
5128     return FALSE;
5129
5130   gtk_signal_disconnect (GTK_OBJECT (text_view), text_view->selection_drag_handler);
5131   text_view->selection_drag_handler = 0;
5132
5133   if (text_view->scroll_timeout != 0)
5134     {
5135       gtk_timeout_remove (text_view->scroll_timeout);
5136       text_view->scroll_timeout = 0;
5137     }
5138
5139   /* one last update to current position */
5140   DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
5141   move_mark_to_pointer_and_scroll (text_view, "insert");
5142
5143   gtk_grab_remove (GTK_WIDGET (text_view));
5144
5145   return TRUE;
5146 }
5147
5148 /*
5149  * Layout utils
5150  */
5151
5152 static void
5153 gtk_text_view_set_attributes_from_style (GtkTextView        *text_view,
5154                                          GtkTextAttributes  *values,
5155                                          GtkStyle           *style)
5156 {
5157   values->appearance.bg_color = style->base[GTK_STATE_NORMAL];
5158   values->appearance.fg_color = style->text[GTK_STATE_NORMAL];
5159
5160   if (values->font)
5161     pango_font_description_free (values->font);
5162
5163   values->font = pango_font_description_copy (style->font_desc);
5164 }
5165
5166 static void
5167 gtk_text_view_check_keymap_direction (GtkTextView *text_view)
5168 {
5169   if (text_view->layout)
5170     {
5171       gboolean split_cursor;
5172       GtkTextDirection new_dir;
5173       GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
5174
5175       g_object_get (G_OBJECT (settings),
5176                     "gtk-split-cursor", &split_cursor,
5177                     NULL);
5178       if (split_cursor)
5179         new_dir = GTK_TEXT_DIR_NONE;
5180       else
5181         new_dir = (gdk_keymap_get_direction (gdk_keymap_get_default ()) == PANGO_DIRECTION_LTR) ?
5182           GTK_TEXT_DIR_LTR : GTK_TEXT_DIR_RTL;
5183
5184       if (text_view->layout->cursor_direction != new_dir)
5185         gtk_text_layout_set_cursor_direction (text_view->layout, new_dir);
5186     }
5187 }
5188
5189 static void
5190 gtk_text_view_ensure_layout (GtkTextView *text_view)
5191 {
5192   GtkWidget *widget;
5193
5194   widget = GTK_WIDGET (text_view);
5195
5196   if (text_view->layout == NULL)
5197     {
5198       GtkTextAttributes *style;
5199       PangoContext *ltr_context, *rtl_context;
5200       GSList *tmp_list;
5201
5202       DV(g_print(G_STRLOC"\n"));
5203
5204       text_view->layout = gtk_text_layout_new ();
5205
5206       g_signal_connect (G_OBJECT (text_view->layout),
5207                         "invalidated",
5208                         G_CALLBACK (invalidated_handler),
5209                         text_view);
5210
5211       g_signal_connect (G_OBJECT (text_view->layout),
5212                         "changed",
5213                         G_CALLBACK (changed_handler),
5214                         text_view);
5215
5216       g_signal_connect (G_OBJECT (text_view->layout),
5217                         "allocate_child",
5218                         G_CALLBACK (gtk_text_view_child_allocated),
5219                         text_view);
5220
5221       if (get_buffer (text_view))
5222         gtk_text_layout_set_buffer (text_view->layout, get_buffer (text_view));
5223
5224       if ((GTK_WIDGET_HAS_FOCUS (text_view) && text_view->cursor_visible))
5225         gtk_text_view_pend_cursor_blink (text_view);
5226       else
5227         gtk_text_layout_set_cursor_visible (text_view->layout, FALSE);
5228
5229       ltr_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
5230       pango_context_set_base_dir (ltr_context, PANGO_DIRECTION_LTR);
5231       rtl_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
5232       pango_context_set_base_dir (rtl_context, PANGO_DIRECTION_RTL);
5233
5234       gtk_text_layout_set_contexts (text_view->layout, ltr_context, rtl_context);
5235
5236       g_object_unref (G_OBJECT (ltr_context));
5237       g_object_unref (G_OBJECT (rtl_context));
5238
5239       gtk_text_view_check_keymap_direction (text_view);
5240
5241       style = gtk_text_attributes_new ();
5242
5243       gtk_widget_ensure_style (widget);
5244       gtk_text_view_set_attributes_from_style (text_view,
5245                                                style, widget->style);
5246
5247       style->pixels_above_lines = text_view->pixels_above_lines;
5248       style->pixels_below_lines = text_view->pixels_below_lines;
5249       style->pixels_inside_wrap = text_view->pixels_inside_wrap;
5250       style->left_margin = text_view->left_margin;
5251       style->right_margin = text_view->right_margin;
5252       style->indent = text_view->indent;
5253       style->tabs = text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
5254
5255       style->wrap_mode = text_view->wrap_mode;
5256       style->justification = text_view->justify;
5257       style->direction = gtk_widget_get_direction (GTK_WIDGET (text_view));
5258
5259       gtk_text_layout_set_default_style (text_view->layout, style);
5260
5261       gtk_text_attributes_unref (style);
5262
5263       /* Set layout for all anchored children */
5264
5265       tmp_list = text_view->children;
5266       while (tmp_list != NULL)
5267         {
5268           GtkTextViewChild *vc = tmp_list->data;
5269
5270           if (vc->anchor)
5271             {
5272               gtk_text_anchored_child_set_layout (vc->widget,
5273                                                   text_view->layout);
5274               /* vc may now be invalid! */
5275             }
5276
5277           tmp_list = g_slist_next (tmp_list);
5278         }
5279     }
5280 }
5281
5282 /**
5283  * gtk_text_view_get_default_attributes:
5284  * @text_view: a #GtkTextView
5285  *
5286  * Obtains a copy of the default text attributes. These are the
5287  * attributes used for text unless a tag overrides them.
5288  * You'd typically pass the default attributes in to
5289  * gtk_text_iter_get_attributes() in order to get the
5290  * attributes in effect at a given text position.
5291  *
5292  * The return value is a copy owned by the caller of this function,
5293  * and should be freed.
5294  *
5295  * Return value: a new #GtkTextAttributes
5296  **/
5297 GtkTextAttributes*
5298 gtk_text_view_get_default_attributes (GtkTextView *text_view)
5299 {
5300   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
5301
5302   gtk_text_view_ensure_layout (text_view);
5303
5304   return gtk_text_attributes_copy (text_view->layout->default_style);
5305 }
5306
5307 static void
5308 gtk_text_view_destroy_layout (GtkTextView *text_view)
5309 {
5310   if (text_view->layout)
5311     {
5312       GSList *tmp_list;
5313
5314       gtk_text_view_remove_validate_idles (text_view);
5315
5316       /* Remove layout from all anchored children */
5317       tmp_list = text_view->children;
5318       while (tmp_list != NULL)
5319         {
5320           GtkTextViewChild *vc = tmp_list->data;
5321
5322           if (vc->anchor)
5323             {
5324               gtk_text_anchored_child_set_layout (vc->widget, NULL);
5325               /* vc may now be invalid! */
5326             }
5327
5328           tmp_list = g_slist_next (tmp_list);
5329         }
5330
5331       gtk_text_view_stop_cursor_blink (text_view);
5332       gtk_text_view_end_selection_drag (text_view, NULL);
5333
5334       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->layout),
5335                                             invalidated_handler, text_view);
5336       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->layout),
5337                                             changed_handler, text_view);
5338       g_object_unref (G_OBJECT (text_view->layout));
5339       text_view->layout = NULL;
5340     }
5341 }
5342
5343 static void
5344 gtk_text_view_reset_im_context (GtkTextView *text_view)
5345 {
5346   if (text_view->need_im_reset)
5347     {
5348       text_view->need_im_reset = FALSE;
5349       gtk_im_context_reset (text_view->im_context);
5350     }
5351 }
5352
5353 /*
5354  * DND feature
5355  */
5356
5357 static void
5358 gtk_text_view_start_selection_dnd (GtkTextView       *text_view,
5359                                    const GtkTextIter *iter,
5360                                    GdkEventMotion    *event)
5361 {
5362   GdkDragContext *context;
5363   GtkTargetList *target_list;
5364
5365   text_view->drag_start_x = -1;
5366   text_view->drag_start_y = -1;
5367   text_view->pending_place_cursor_button = 0;
5368
5369   target_list = gtk_target_list_new (target_table,
5370                                      G_N_ELEMENTS (target_table));
5371
5372   context = gtk_drag_begin (GTK_WIDGET (text_view), target_list,
5373                             GDK_ACTION_COPY | GDK_ACTION_MOVE,
5374                             1, (GdkEvent*)event);
5375
5376   gtk_target_list_unref (target_list);
5377
5378   gtk_drag_set_icon_default (context);
5379 }
5380
5381 static void
5382 gtk_text_view_drag_begin (GtkWidget        *widget,
5383                           GdkDragContext   *context)
5384 {
5385   /* do nothing */
5386 }
5387
5388 static void
5389 gtk_text_view_drag_end (GtkWidget        *widget,
5390                         GdkDragContext   *context)
5391 {
5392   GtkTextView *text_view;
5393
5394   text_view = GTK_TEXT_VIEW (widget);
5395 }
5396
5397 static void
5398 gtk_text_view_drag_data_get (GtkWidget        *widget,
5399                              GdkDragContext   *context,
5400                              GtkSelectionData *selection_data,
5401                              guint             info,
5402                              guint             time)
5403 {
5404   GtkTextView *text_view;
5405
5406   text_view = GTK_TEXT_VIEW (widget);
5407
5408   if (selection_data->target == gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE))
5409     {
5410       GtkTextBuffer *buffer = gtk_text_view_get_buffer (text_view);
5411
5412       gtk_selection_data_set (selection_data,
5413                               gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE),
5414                               8, /* bytes */
5415                               (void*)&buffer,
5416                               sizeof (buffer));
5417     }
5418   else
5419     {
5420       gchar *str;
5421       GtkTextIter start;
5422       GtkTextIter end;
5423
5424       str = NULL;
5425
5426       if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
5427                                                 &start, &end))
5428         {
5429           /* Extract the selected text */
5430           str = gtk_text_iter_get_visible_text (&start, &end);
5431         }
5432
5433       if (str)
5434         {
5435           gtk_selection_data_set_text (selection_data, str, -1);
5436           g_free (str);
5437         }
5438     }
5439 }
5440
5441 static void
5442 gtk_text_view_drag_data_delete (GtkWidget        *widget,
5443                                 GdkDragContext   *context)
5444 {
5445   GtkTextView *text_view;
5446
5447   text_view = GTK_TEXT_VIEW (widget);
5448
5449   gtk_text_buffer_delete_selection (GTK_TEXT_VIEW (widget)->buffer,
5450                                     TRUE, GTK_TEXT_VIEW (widget)->editable);
5451 }
5452
5453 static void
5454 gtk_text_view_drag_leave (GtkWidget        *widget,
5455                           GdkDragContext   *context,
5456                           guint             time)
5457 {
5458   GtkTextView *text_view;
5459
5460   text_view = GTK_TEXT_VIEW (widget);
5461
5462   gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
5463
5464   if (text_view->scroll_timeout != 0)
5465     gtk_timeout_remove (text_view->scroll_timeout);
5466
5467   text_view->scroll_timeout = 0;
5468 }
5469
5470 static gboolean
5471 gtk_text_view_drag_motion (GtkWidget        *widget,
5472                            GdkDragContext   *context,
5473                            gint              x,
5474                            gint              y,
5475                            guint             time)
5476 {
5477   GtkTextIter newplace;
5478   GtkTextView *text_view;
5479   GtkTextIter start;
5480   GtkTextIter end;
5481   GdkRectangle target_rect;
5482   gint bx, by;
5483   GdkDragAction suggested_action = 0;
5484
5485   text_view = GTK_TEXT_VIEW (widget);
5486
5487   target_rect = text_view->text_window->allocation;
5488
5489   if (x < target_rect.x ||
5490       y < target_rect.y ||
5491       x > (target_rect.x + target_rect.width) ||
5492       y > (target_rect.y + target_rect.height))
5493     return FALSE; /* outside the text window, allow parent widgets to handle event */
5494
5495   gtk_text_view_window_to_buffer_coords (text_view,
5496                                          GTK_TEXT_WINDOW_WIDGET,
5497                                          x, y,
5498                                          &bx, &by);
5499
5500   gtk_text_layout_get_iter_at_pixel (text_view->layout,
5501                                      &newplace,
5502                                      bx, by);
5503
5504   if (gtk_drag_dest_find_target (widget, context,
5505                                  gtk_drag_dest_get_target_list (widget)) == GDK_NONE)
5506     {
5507       /* can't accept any of the offered targets */
5508     }
5509   else if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
5510                                             &start, &end) &&
5511            gtk_text_iter_in_range (&newplace, &start, &end))
5512     {
5513       /* We're inside the selection. */
5514     }
5515   else
5516     {
5517       if (gtk_text_iter_can_insert (&newplace, text_view->editable))
5518         {
5519           GtkWidget *source_widget;
5520
5521           suggested_action = context->suggested_action;
5522
5523           source_widget = gtk_drag_get_source_widget (context);
5524
5525           if (source_widget == widget)
5526             {
5527               /* Default to MOVE, unless the user has
5528                * pressed ctrl or alt to affect available actions
5529                */
5530               if ((context->actions & GDK_ACTION_MOVE) != 0)
5531                 suggested_action = GDK_ACTION_MOVE;
5532             }
5533         }
5534       else
5535         {
5536           /* Can't drop here. */
5537         }
5538     }
5539
5540   if (suggested_action != 0)
5541     {
5542       gtk_text_mark_set_visible (text_view->dnd_mark,
5543                                  text_view->cursor_visible);
5544
5545       gdk_drag_status (context, suggested_action, time);
5546     }
5547   else
5548     {
5549       gdk_drag_status (context, 0, time);
5550       gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
5551     }
5552
5553   gtk_text_buffer_move_mark (get_buffer (text_view),
5554                              text_view->dnd_mark,
5555                              &newplace);
5556
5557   DV(g_print (G_STRLOC": scrolling to mark\n"));
5558   gtk_text_view_scroll_to_mark (text_view,
5559                                 text_view->dnd_mark,
5560                                 DND_SCROLL_MARGIN, FALSE, 0.0, 0.0);
5561
5562   if (text_view->scroll_timeout != 0) /* reset on every motion event */
5563     gtk_timeout_remove (text_view->scroll_timeout);
5564
5565   text_view->scroll_timeout =
5566     gtk_timeout_add (50, drag_scan_timeout, text_view);
5567
5568   /* TRUE return means don't propagate the drag motion to parent
5569    * widgets that may also be drop sites.
5570    */
5571   return TRUE;
5572 }
5573
5574 static gboolean
5575 gtk_text_view_drag_drop (GtkWidget        *widget,
5576                          GdkDragContext   *context,
5577                          gint              x,
5578                          gint              y,
5579                          guint             time)
5580 {
5581   GtkTextView *text_view;
5582   GtkTextIter drop_point;
5583   GdkAtom target = GDK_NONE;
5584
5585   text_view = GTK_TEXT_VIEW (widget);
5586
5587   if (text_view->scroll_timeout != 0)
5588     gtk_timeout_remove (text_view->scroll_timeout);
5589
5590   text_view->scroll_timeout = 0;
5591
5592   gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
5593
5594   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
5595                                     &drop_point,
5596                                     text_view->dnd_mark);
5597
5598   if (gtk_text_iter_can_insert (&drop_point, text_view->editable))
5599     target = gtk_drag_dest_find_target (widget, context, NULL);
5600
5601   if (target != GDK_NONE)
5602     gtk_drag_get_data (widget, context, target, time);
5603   else
5604     gtk_drag_finish (context, FALSE, FALSE, time);
5605
5606   return TRUE;
5607 }
5608
5609 static void
5610 insert_text_data (GtkTextView      *text_view,
5611                   GtkTextIter      *drop_point,
5612                   GtkSelectionData *selection_data)
5613 {
5614   gchar *str;
5615
5616   str = gtk_selection_data_get_text (selection_data);
5617
5618   if (str)
5619     {
5620       gtk_text_buffer_insert_interactive (get_buffer (text_view),
5621                                           drop_point, str, -1,
5622                                           text_view->editable);
5623       g_free (str);
5624     }
5625 }
5626
5627 static void
5628 gtk_text_view_drag_data_received (GtkWidget        *widget,
5629                                   GdkDragContext   *context,
5630                                   gint              x,
5631                                   gint              y,
5632                                   GtkSelectionData *selection_data,
5633                                   guint             info,
5634                                   guint             time)
5635 {
5636   GtkTextIter drop_point;
5637   GtkTextView *text_view;
5638   gboolean success = FALSE;
5639
5640   text_view = GTK_TEXT_VIEW (widget);
5641
5642   if (!text_view->dnd_mark)
5643     goto done;
5644
5645   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
5646                                     &drop_point,
5647                                     text_view->dnd_mark);
5648
5649   if (!gtk_text_iter_can_insert (&drop_point, text_view->editable))
5650     goto done;
5651
5652   if (selection_data->target == gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE))
5653     {
5654       GtkTextBuffer *src_buffer = NULL;
5655       GtkTextIter start, end;
5656       gboolean copy_tags = TRUE;
5657
5658       if (selection_data->length != sizeof (src_buffer))
5659         return;
5660
5661       memcpy (&src_buffer, selection_data->data, sizeof (src_buffer));
5662
5663       if (src_buffer == NULL)
5664         return;
5665
5666       g_return_if_fail (GTK_IS_TEXT_BUFFER (src_buffer));
5667
5668       if (gtk_text_buffer_get_tag_table (src_buffer) !=
5669           gtk_text_buffer_get_tag_table (get_buffer (text_view)))
5670         copy_tags = FALSE;
5671
5672       if (gtk_text_buffer_get_selection_bounds (src_buffer,
5673                                                 &start,
5674                                                 &end))
5675         {
5676           if (copy_tags)
5677             gtk_text_buffer_insert_range_interactive (get_buffer (text_view),
5678                                                       &drop_point,
5679                                                       &start,
5680                                                       &end,
5681                                                       text_view->editable);
5682           else
5683             {
5684               gchar *str;
5685
5686               str = gtk_text_iter_get_visible_text (&start, &end);
5687               gtk_text_buffer_insert_interactive (get_buffer (text_view),
5688                                                   &drop_point, str, -1,
5689                                                   text_view->editable);
5690               g_free (str);
5691             }
5692         }
5693     }
5694   else
5695     insert_text_data (text_view, &drop_point, selection_data);
5696
5697   success = TRUE;
5698
5699  done:
5700   gtk_drag_finish (context, success,
5701                    success && context->action == GDK_ACTION_MOVE,
5702                    time);
5703 }
5704
5705 static GtkAdjustment*
5706 get_hadjustment (GtkTextView *text_view)
5707 {
5708   if (text_view->hadjustment == NULL)
5709     gtk_text_view_set_scroll_adjustments (text_view,
5710                                           NULL, /* forces creation */
5711                                           text_view->vadjustment);
5712
5713   return text_view->hadjustment;
5714 }
5715
5716 static GtkAdjustment*
5717 get_vadjustment (GtkTextView *text_view)
5718 {
5719   if (text_view->vadjustment == NULL)
5720     gtk_text_view_set_scroll_adjustments (text_view,
5721                                           text_view->hadjustment,
5722                                           NULL); /* forces creation */
5723   return text_view->vadjustment;
5724 }
5725
5726
5727 static void
5728 gtk_text_view_set_scroll_adjustments (GtkTextView   *text_view,
5729                                       GtkAdjustment *hadj,
5730                                       GtkAdjustment *vadj)
5731 {
5732   gboolean need_adjust = FALSE;
5733
5734   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
5735
5736   if (hadj)
5737     g_return_if_fail (GTK_IS_ADJUSTMENT (hadj));
5738   else
5739     hadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
5740   if (vadj)
5741     g_return_if_fail (GTK_IS_ADJUSTMENT (vadj));
5742   else
5743     vadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
5744
5745   if (text_view->hadjustment && (text_view->hadjustment != hadj))
5746     {
5747       gtk_signal_disconnect_by_data (GTK_OBJECT (text_view->hadjustment), text_view);
5748       g_object_unref (G_OBJECT (text_view->hadjustment));
5749     }
5750
5751   if (text_view->vadjustment && (text_view->vadjustment != vadj))
5752     {
5753       gtk_signal_disconnect_by_data (GTK_OBJECT (text_view->vadjustment), text_view);
5754       g_object_unref (G_OBJECT (text_view->vadjustment));
5755     }
5756
5757   if (text_view->hadjustment != hadj)
5758     {
5759       text_view->hadjustment = hadj;
5760       g_object_ref (G_OBJECT (text_view->hadjustment));
5761       gtk_object_sink (GTK_OBJECT (text_view->hadjustment));
5762
5763       gtk_signal_connect (GTK_OBJECT (text_view->hadjustment), "value_changed",
5764                           (GtkSignalFunc) gtk_text_view_value_changed,
5765                           text_view);
5766       need_adjust = TRUE;
5767     }
5768
5769   if (text_view->vadjustment != vadj)
5770     {
5771       text_view->vadjustment = vadj;
5772       g_object_ref (G_OBJECT (text_view->vadjustment));
5773       gtk_object_sink (GTK_OBJECT (text_view->vadjustment));
5774
5775       gtk_signal_connect (GTK_OBJECT (text_view->vadjustment), "value_changed",
5776                           (GtkSignalFunc) gtk_text_view_value_changed,
5777                           text_view);
5778       need_adjust = TRUE;
5779     }
5780
5781   if (need_adjust)
5782     gtk_text_view_value_changed (NULL, text_view);
5783 }
5784
5785 static void
5786 gtk_text_view_value_changed (GtkAdjustment *adj,
5787                              GtkTextView   *text_view)
5788 {
5789   GtkTextIter iter;
5790   gint line_top;
5791   gint dx = 0;
5792   gint dy = 0;
5793
5794   /* Note that we oddly call this function with adj == NULL
5795    * sometimes
5796    */
5797
5798   text_view->onscreen_validated = FALSE;
5799
5800   DV(g_print(">Scroll offset changed %s/%g, onscreen_validated = FALSE ("G_STRLOC")\n",
5801              adj == text_view->hadjustment ? "hadj" : adj == text_view->vadjustment ? "vadj" : "none",
5802              adj ? adj->value : 0.0));
5803
5804   if (adj == text_view->hadjustment)
5805     {
5806       dx = text_view->xoffset - (gint)adj->value;
5807       text_view->xoffset = adj->value;
5808     }
5809   else if (adj == text_view->vadjustment)
5810     {
5811       dy = text_view->yoffset - (gint)adj->value;
5812       text_view->yoffset = adj->value;
5813
5814       if (text_view->layout)
5815         {
5816           gtk_text_layout_get_line_at_y (text_view->layout, &iter, adj->value, &line_top);
5817
5818           gtk_text_buffer_move_mark (get_buffer (text_view), text_view->first_para_mark, &iter);
5819
5820           text_view->first_para_pixels = adj->value - line_top;
5821         }
5822     }
5823
5824   if (dx != 0 || dy != 0)
5825     {
5826       GSList *tmp_list;
5827
5828       if (GTK_WIDGET_REALIZED (text_view))
5829         {
5830           if (dy != 0)
5831             {
5832               if (text_view->left_window)
5833                 text_window_scroll (text_view->left_window, 0, dy);
5834               if (text_view->right_window)
5835                 text_window_scroll (text_view->right_window, 0, dy);
5836             }
5837
5838           if (dx != 0)
5839             {
5840               if (text_view->top_window)
5841                 text_window_scroll (text_view->top_window, dx, 0);
5842               if (text_view->bottom_window)
5843                 text_window_scroll (text_view->bottom_window, dx, 0);
5844             }
5845
5846           /* It looks nicer to scroll the main area last, because
5847            * it takes a while, and making the side areas update
5848            * afterward emphasizes the slowness of scrolling the
5849            * main area.
5850            */
5851           text_window_scroll (text_view->text_window, dx, dy);
5852         }
5853
5854       /* Children are now "moved" in the text window, poke
5855        * into widget->allocation for each child
5856        */
5857       tmp_list = text_view->children;
5858       while (tmp_list != NULL)
5859         {
5860           GtkTextViewChild *child = tmp_list->data;
5861
5862           if (child->anchor)
5863             {
5864               child->widget->allocation.x -= dx;
5865               child->widget->allocation.y -= dy;
5866
5867 #if 0
5868               g_print ("allocation for %p tweaked to %d,%d\n",
5869                        child->widget,
5870                        child->widget->allocation.x,
5871                        child->widget->allocation.y);
5872 #endif
5873             }
5874
5875           tmp_list = g_slist_next (tmp_list);
5876         }
5877     }
5878
5879   /* This could result in invalidation, which would install the
5880    * first_validate_idle, which would validate onscreen;
5881    * but we're going to go ahead and validate here, so
5882    * first_validate_idle shouldn't have anything to do.
5883    */
5884   gtk_text_view_update_layout_width (text_view);
5885
5886   /* note that validation of onscreen could invoke this function
5887    * recursively, by scrolling to maintain first_para, or in response
5888    * to updating the layout width, however there is no problem with
5889    * that, or shouldn't be.
5890    */
5891   gtk_text_view_validate_onscreen (text_view);
5892
5893   /* process exposes */
5894   if (GTK_WIDGET_REALIZED (text_view))
5895     {
5896       DV (g_print ("Processing updates (%s)\n", G_STRLOC));
5897
5898       if (text_view->left_window)
5899         gdk_window_process_updates (text_view->left_window->bin_window, TRUE);
5900
5901       if (text_view->right_window)
5902         gdk_window_process_updates (text_view->right_window->bin_window, TRUE);
5903
5904       if (text_view->top_window)
5905         gdk_window_process_updates (text_view->top_window->bin_window, TRUE);
5906
5907       if (text_view->bottom_window)
5908         gdk_window_process_updates (text_view->bottom_window->bin_window, TRUE);
5909
5910       gdk_window_process_updates (text_view->text_window->bin_window, TRUE);
5911     }
5912
5913   /* If this got installed, get rid of it, it's just a waste of time. */
5914   if (text_view->first_validate_idle != 0)
5915     {
5916       g_source_remove (text_view->first_validate_idle);
5917       text_view->first_validate_idle = 0;
5918     }
5919
5920   gtk_text_view_update_im_spot_location (text_view);
5921
5922   DV(g_print(">End scroll offset changed handler ("G_STRLOC")\n"));
5923 }
5924
5925 static void
5926 gtk_text_view_commit_handler (GtkIMContext  *context,
5927                               const gchar   *str,
5928                               GtkTextView   *text_view)
5929 {
5930   gtk_text_view_commit_text (text_view, str);
5931 }
5932
5933 static void
5934 gtk_text_view_commit_text (GtkTextView   *text_view,
5935                            const gchar   *str)
5936 {
5937   gboolean had_selection;
5938
5939   gtk_text_buffer_begin_user_action (get_buffer (text_view));
5940
5941   had_selection = gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
5942                                                         NULL, NULL);
5943
5944   gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
5945                                     text_view->editable);
5946
5947   if (!strcmp (str, "\n"))
5948     {
5949       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\n", 1,
5950                                                     text_view->editable);
5951     }
5952   else
5953     {
5954       if (!had_selection && text_view->overwrite_mode)
5955         gtk_text_view_delete_from_cursor (text_view, GTK_DELETE_CHARS, 1);
5956       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
5957                                                     text_view->editable);
5958     }
5959
5960   gtk_text_buffer_end_user_action (get_buffer (text_view));
5961
5962   DV(g_print (G_STRLOC": scrolling onscreen\n"));
5963   gtk_text_view_scroll_mark_onscreen (text_view,
5964                                       gtk_text_buffer_get_mark (get_buffer (text_view),
5965                                                                 "insert"));
5966 }
5967
5968 static void
5969 gtk_text_view_preedit_changed_handler (GtkIMContext *context,
5970                                        GtkTextView  *text_view)
5971 {
5972   gchar *str;
5973   PangoAttrList *attrs;
5974   gint cursor_pos;
5975
5976   gtk_im_context_get_preedit_string (context, &str, &attrs, &cursor_pos);
5977   gtk_text_layout_set_preedit_string (text_view->layout, str, attrs, cursor_pos);
5978
5979   pango_attr_list_unref (attrs);
5980   g_free (str);
5981 }
5982
5983 static gboolean
5984 gtk_text_view_retrieve_surrounding_handler (GtkIMContext  *context,
5985                                             GtkTextView   *text_view)
5986 {
5987   GtkTextIter start;
5988   GtkTextIter end;
5989   gint pos;
5990   gchar *text;
5991
5992   gtk_text_buffer_get_iter_at_mark (text_view->buffer, &start,
5993                                     gtk_text_buffer_get_insert (text_view->buffer));
5994   end = start;
5995
5996   pos = gtk_text_iter_get_line_index (&start);
5997   gtk_text_iter_set_line_offset (&start, 0);
5998   gtk_text_iter_forward_to_line_end (&end);
5999
6000   text = gtk_text_iter_get_slice (&start, &end);
6001   gtk_im_context_set_surrounding (context, text, -1, pos);
6002   g_free (text);
6003
6004   return TRUE;
6005 }
6006
6007 static gboolean
6008 gtk_text_view_delete_surrounding_handler (GtkIMContext  *context,
6009                                           gint           offset,
6010                                           gint           n_chars,
6011                                           GtkTextView   *text_view)
6012 {
6013   GtkTextIter start;
6014   GtkTextIter end;
6015
6016   gtk_text_buffer_get_iter_at_mark (text_view->buffer, &start,
6017                                     gtk_text_buffer_get_insert (text_view->buffer));
6018   end = start;
6019
6020   gtk_text_iter_forward_chars (&start, offset);
6021   gtk_text_iter_forward_chars (&end, offset + n_chars);
6022
6023   gtk_text_buffer_delete (text_view->buffer, &start, &end);
6024
6025   return TRUE;
6026 }
6027
6028 static void
6029 gtk_text_view_mark_set_handler (GtkTextBuffer     *buffer,
6030                                 const GtkTextIter *location,
6031                                 GtkTextMark       *mark,
6032                                 gpointer           data)
6033 {
6034   GtkTextView *text_view = GTK_TEXT_VIEW (data);
6035   gboolean need_reset = FALSE;
6036
6037   if (mark == gtk_text_buffer_get_insert (buffer))
6038     {
6039       text_view->virtual_cursor_x = -1;
6040       text_view->virtual_cursor_y = -1;
6041       gtk_text_view_update_im_spot_location (text_view);
6042       need_reset = TRUE;
6043     }
6044   else if (mark == gtk_text_buffer_get_selection_bound (buffer))
6045     {
6046       need_reset = TRUE;
6047     }
6048
6049   if (need_reset)
6050     gtk_text_view_reset_im_context (text_view);
6051 }
6052
6053 static void
6054 gtk_text_view_get_virtual_cursor_pos (GtkTextView *text_view,
6055                                       gint        *x,
6056                                       gint        *y)
6057 {
6058   GdkRectangle strong_pos;
6059   GtkTextIter insert;
6060
6061   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
6062                                     gtk_text_buffer_get_mark (get_buffer (text_view),
6063                                                               "insert"));
6064
6065   if ((x && text_view->virtual_cursor_x == -1) ||
6066       (y && text_view->virtual_cursor_y == -1))
6067     gtk_text_layout_get_cursor_locations (text_view->layout, &insert, &strong_pos, NULL);
6068
6069   if (x)
6070     {
6071       if (text_view->virtual_cursor_x != -1)
6072         *x = text_view->virtual_cursor_x;
6073       else
6074         *x = strong_pos.x;
6075     }
6076
6077   if (y)
6078     {
6079       if (text_view->virtual_cursor_x != -1)
6080         *y = text_view->virtual_cursor_y;
6081       else
6082         *y = strong_pos.y + strong_pos.height / 2;
6083     }
6084 }
6085
6086 static void
6087 gtk_text_view_set_virtual_cursor_pos (GtkTextView *text_view,
6088                                       gint         x,
6089                                       gint         y)
6090 {
6091   GdkRectangle strong_pos;
6092   GtkTextIter insert;
6093
6094   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
6095                                     gtk_text_buffer_get_mark (get_buffer (text_view),
6096                                                               "insert"));
6097
6098   if (x == -1 || y == -1)
6099     gtk_text_layout_get_cursor_locations (text_view->layout, &insert, &strong_pos, NULL);
6100
6101   text_view->virtual_cursor_x = (x == -1) ? strong_pos.x : x;
6102   text_view->virtual_cursor_y = (y == -1) ? strong_pos.y + strong_pos.height / 2 : y;
6103 }
6104
6105 /* Quick hack of a popup menu
6106  */
6107 static void
6108 activate_cb (GtkWidget   *menuitem,
6109              GtkTextView *text_view)
6110 {
6111   const gchar *signal = g_object_get_data (G_OBJECT (menuitem), "gtk-signal");
6112   gtk_signal_emit_by_name (GTK_OBJECT (text_view), signal);
6113 }
6114
6115 static void
6116 append_action_signal (GtkTextView  *text_view,
6117                       GtkWidget    *menu,
6118                       const gchar  *stock_id,
6119                       const gchar  *signal,
6120                       gboolean      sensitive)
6121 {
6122   GtkWidget *menuitem = gtk_image_menu_item_new_from_stock (stock_id, NULL);
6123
6124   g_object_set_data (G_OBJECT (menuitem), "gtk-signal", (char *)signal);
6125   gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
6126                       GTK_SIGNAL_FUNC (activate_cb), text_view);
6127
6128   gtk_widget_set_sensitive (menuitem, sensitive);
6129
6130   gtk_widget_show (menuitem);
6131   gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
6132 }
6133
6134 static void
6135 popup_menu_detach (GtkWidget *attach_widget,
6136                    GtkMenu   *menu)
6137 {
6138   GTK_TEXT_VIEW (attach_widget)->popup_menu = NULL;
6139 }
6140
6141 static void
6142 popup_position_func (GtkMenu   *menu,
6143                      gint      *x,
6144                      gint      *y,
6145                      gboolean  *push_in,
6146                      gpointer   user_data)
6147 {
6148   GtkTextView *text_view;
6149   GtkWidget *widget;
6150   GdkRectangle cursor_rect;
6151   GdkRectangle onscreen_rect;
6152   gint root_x, root_y;
6153   GtkTextIter iter;
6154   GtkRequisition req;
6155
6156   text_view = GTK_TEXT_VIEW (user_data);
6157   widget = GTK_WIDGET (text_view);
6158
6159   g_return_if_fail (GTK_WIDGET_REALIZED (text_view));
6160
6161   gdk_window_get_origin (widget->window, &root_x, &root_y);
6162
6163   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
6164                                     &iter,
6165                                     gtk_text_buffer_get_insert (get_buffer (text_view)));
6166
6167   gtk_text_view_get_iter_location (text_view,
6168                                    &iter,
6169                                    &cursor_rect);
6170
6171   gtk_text_view_get_visible_rect (text_view, &onscreen_rect);
6172
6173   gtk_widget_size_request (text_view->popup_menu, &req);
6174
6175   /* can't use rectangle_intersect since cursor rect can have 0 width */
6176   if (cursor_rect.x >= onscreen_rect.x &&
6177       cursor_rect.x < onscreen_rect.x + onscreen_rect.width &&
6178       cursor_rect.y >= onscreen_rect.y &&
6179       cursor_rect.y < onscreen_rect.y + onscreen_rect.height)
6180     {
6181       gtk_text_view_buffer_to_window_coords (text_view,
6182                                              GTK_TEXT_WINDOW_WIDGET,
6183                                              cursor_rect.x, cursor_rect.y,
6184                                              &cursor_rect.x, &cursor_rect.y);
6185
6186       *x = root_x + cursor_rect.x + cursor_rect.width;
6187       *y = root_y + cursor_rect.y + cursor_rect.height;
6188     }
6189   else
6190     {
6191       /* Just center the menu, since cursor is offscreen. */
6192       *x = root_x + (widget->allocation.width / 2 - req.width / 2);
6193       *y = root_y + (widget->allocation.height / 2 - req.height / 2);
6194     }
6195
6196   /* Ensure sanity */
6197   *x = CLAMP (*x, root_x, (root_x + widget->allocation.width));
6198   *y = CLAMP (*y, root_y, (root_y + widget->allocation.height));
6199
6200   *x = CLAMP (*x, 0, MAX (0, gdk_screen_width () - req.width));
6201   *y = CLAMP (*y, 0, MAX (0, gdk_screen_height () - req.height));
6202 }
6203
6204 typedef struct
6205 {
6206   GtkTextView *text_view;
6207   gint button;
6208   guint time;
6209 } PopupInfo;
6210
6211 static gboolean
6212 range_contains_editable_text (const GtkTextIter *start,
6213                               const GtkTextIter *end,
6214                               gboolean default_editability)
6215 {
6216   GtkTextIter iter = *start;
6217
6218   while (gtk_text_iter_compare (&iter, end) < 0)
6219     {
6220       if (gtk_text_iter_editable (&iter, default_editability))
6221         return TRUE;
6222
6223       gtk_text_iter_forward_to_tag_toggle (&iter, NULL);
6224     }
6225
6226   return FALSE;
6227 }
6228
6229 static void
6230 unichar_chosen_func (const char *text,
6231                      gpointer    data)
6232 {
6233   GtkTextView *text_view = GTK_TEXT_VIEW (data);
6234
6235   gtk_text_view_commit_text (text_view, text);
6236 }
6237
6238 static void
6239 popup_targets_received (GtkClipboard     *clipboard,
6240                         GtkSelectionData *data,
6241                         gpointer          user_data)
6242 {
6243   PopupInfo *info = user_data;
6244   GtkTextView *text_view = info->text_view;
6245
6246   if (GTK_WIDGET_REALIZED (text_view))
6247     {
6248       /* We implicitely rely here on the fact that if we are pasting ourself, we'll
6249        * have text targets as well as the private GTK_TEXT_BUFFER_CONTENTS target.
6250        */
6251       gboolean clipboard_contains_text = gtk_selection_data_targets_include_text (data);
6252       GtkWidget *menuitem;
6253       GtkWidget *submenu;
6254       gboolean have_selection;
6255       gboolean can_insert;
6256       GtkTextIter iter;
6257       GtkTextIter sel_start, sel_end;
6258
6259       if (text_view->popup_menu)
6260         gtk_widget_destroy (text_view->popup_menu);
6261
6262       text_view->popup_menu = gtk_menu_new ();
6263
6264       gtk_menu_attach_to_widget (GTK_MENU (text_view->popup_menu),
6265                                  GTK_WIDGET (text_view),
6266                                  popup_menu_detach);
6267
6268       have_selection = gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
6269                                                              &sel_start, &sel_end);
6270
6271       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
6272                                         &iter,
6273                                         gtk_text_buffer_get_insert (get_buffer (text_view)));
6274
6275       can_insert = gtk_text_iter_can_insert (&iter, text_view->editable);
6276
6277       append_action_signal (text_view, text_view->popup_menu, GTK_STOCK_CUT, "cut_clipboard",
6278                             have_selection &&
6279                             range_contains_editable_text (&sel_start, &sel_end,
6280                                                           text_view->editable));
6281       append_action_signal (text_view, text_view->popup_menu, GTK_STOCK_COPY, "copy_clipboard",
6282                             have_selection);
6283       append_action_signal (text_view, text_view->popup_menu, GTK_STOCK_PASTE, "paste_clipboard",
6284                             can_insert && clipboard_contains_text);
6285
6286       menuitem = gtk_separator_menu_item_new ();
6287       gtk_widget_show (menuitem);
6288       gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
6289
6290       menuitem = gtk_menu_item_new_with_mnemonic (_("Input _Methods"));
6291       gtk_widget_show (menuitem);
6292       submenu = gtk_menu_new ();
6293       gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), submenu);
6294       gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
6295
6296       gtk_im_multicontext_append_menuitems (GTK_IM_MULTICONTEXT (text_view->im_context),
6297                                             GTK_MENU_SHELL (submenu));
6298
6299       menuitem = gtk_menu_item_new_with_mnemonic (_("_Insert Unicode control character"));
6300       gtk_widget_show (menuitem);
6301       gtk_widget_set_sensitive (menuitem, can_insert);
6302
6303       submenu = gtk_menu_new ();
6304       gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), submenu);
6305       gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
6306
6307       _gtk_text_util_append_special_char_menuitems (GTK_MENU_SHELL (submenu),
6308                                                     unichar_chosen_func,
6309                                                     text_view);
6310
6311       gtk_signal_emit (GTK_OBJECT (text_view),
6312                        signals[POPULATE_POPUP],
6313                        text_view->popup_menu);
6314
6315       if (info->button)
6316         gtk_menu_popup (GTK_MENU (text_view->popup_menu), NULL, NULL,
6317                         NULL, NULL,
6318                         info->button, info->time);
6319       else
6320         {
6321           gtk_menu_popup (GTK_MENU (text_view->popup_menu), NULL, NULL,
6322                           popup_position_func, text_view,
6323                           0, gtk_get_current_event_time ());
6324           _gtk_menu_shell_select_first (GTK_MENU_SHELL (text_view->popup_menu));
6325         }
6326     }
6327
6328   g_object_unref (text_view);
6329   g_free (info);
6330 }
6331
6332 static void
6333 gtk_text_view_do_popup (GtkTextView    *text_view,
6334                         GdkEventButton *event)
6335 {
6336   PopupInfo *info = g_new (PopupInfo, 1);
6337
6338   /* In order to know what entries we should make sensitive, we
6339    * ask for the current targets of the clipboard, and when
6340    * we get them, then we actually pop up the menu.
6341    */
6342   info->text_view = g_object_ref (text_view);
6343
6344   if (event)
6345     {
6346       info->button = event->button;
6347       info->time = event->time;
6348     }
6349   else
6350     {
6351       info->button = 0;
6352       info->time = gtk_get_current_event_time ();
6353     }
6354
6355   gtk_clipboard_request_contents (gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
6356                                   gdk_atom_intern ("TARGETS", FALSE),
6357                                   popup_targets_received,
6358                                   info);
6359 }
6360
6361 static gboolean
6362 gtk_text_view_popup_menu (GtkWidget *widget)
6363 {
6364   gtk_text_view_do_popup (GTK_TEXT_VIEW (widget), NULL);
6365   return TRUE;
6366 }
6367
6368 /* Child GdkWindows */
6369
6370
6371 static GtkTextWindow*
6372 text_window_new (GtkTextWindowType  type,
6373                  GtkWidget         *widget,
6374                  gint               width_request,
6375                  gint               height_request)
6376 {
6377   GtkTextWindow *win;
6378
6379   win = g_new (GtkTextWindow, 1);
6380
6381   win->type = type;
6382   win->widget = widget;
6383   win->window = NULL;
6384   win->bin_window = NULL;
6385   win->requisition.width = width_request;
6386   win->requisition.height = height_request;
6387   win->allocation.width = width_request;
6388   win->allocation.height = height_request;
6389   win->allocation.x = 0;
6390   win->allocation.y = 0;
6391
6392   return win;
6393 }
6394
6395 static void
6396 text_window_free (GtkTextWindow *win)
6397 {
6398   if (win->window)
6399     text_window_unrealize (win);
6400
6401   g_free (win);
6402 }
6403
6404 static void
6405 text_window_realize (GtkTextWindow *win,
6406                      GdkWindow     *parent)
6407 {
6408   GdkWindowAttr attributes;
6409   gint attributes_mask;
6410   GdkCursor *cursor;
6411
6412   attributes.window_type = GDK_WINDOW_CHILD;
6413   attributes.x = win->allocation.x;
6414   attributes.y = win->allocation.y;
6415   attributes.width = win->allocation.width;
6416   attributes.height = win->allocation.height;
6417   attributes.wclass = GDK_INPUT_OUTPUT;
6418   attributes.visual = gtk_widget_get_visual (win->widget);
6419   attributes.colormap = gtk_widget_get_colormap (win->widget);
6420   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK;
6421
6422   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
6423
6424   win->window = gdk_window_new (parent,
6425                                 &attributes,
6426                                 attributes_mask);
6427
6428   gdk_window_show (win->window);
6429   gdk_window_set_user_data (win->window, win->widget);
6430
6431   attributes.x = 0;
6432   attributes.y = 0;
6433   attributes.width = win->allocation.width;
6434   attributes.height = win->allocation.height;
6435   attributes.event_mask = (GDK_EXPOSURE_MASK            |
6436                            GDK_SCROLL_MASK              |
6437                            GDK_KEY_PRESS_MASK           |
6438                            GDK_BUTTON_PRESS_MASK        |
6439                            GDK_BUTTON_RELEASE_MASK      |
6440                            GDK_POINTER_MOTION_MASK      |
6441                            GDK_POINTER_MOTION_HINT_MASK |
6442                            gtk_widget_get_events (win->widget));
6443
6444   win->bin_window = gdk_window_new (win->window,
6445                                     &attributes,
6446                                     attributes_mask);
6447
6448   gdk_window_show (win->bin_window);
6449   gdk_window_set_user_data (win->bin_window, win->widget);
6450
6451   if (win->type == GTK_TEXT_WINDOW_TEXT)
6452     {
6453       /* I-beam cursor */
6454       cursor = gdk_cursor_new (GDK_XTERM);
6455       gdk_window_set_cursor (win->bin_window, cursor);
6456       gdk_cursor_unref (cursor);
6457
6458       gtk_im_context_set_client_window (GTK_TEXT_VIEW (win->widget)->im_context,
6459                                         win->window);
6460
6461
6462       gdk_window_set_background (win->bin_window,
6463                                  &win->widget->style->base[GTK_WIDGET_STATE (win->widget)]);
6464     }
6465   else
6466     {
6467       gdk_window_set_background (win->bin_window,
6468                                  &win->widget->style->bg[GTK_WIDGET_STATE (win->widget)]);
6469     }
6470
6471   g_object_set_qdata (G_OBJECT (win->window),
6472                       g_quark_from_static_string ("gtk-text-view-text-window"),
6473                       win);
6474
6475   g_object_set_qdata (G_OBJECT (win->bin_window),
6476                       g_quark_from_static_string ("gtk-text-view-text-window"),
6477                       win);
6478 }
6479
6480 static void
6481 text_window_unrealize (GtkTextWindow *win)
6482 {
6483   if (win->type == GTK_TEXT_WINDOW_TEXT)
6484     {
6485       gtk_im_context_set_client_window (GTK_TEXT_VIEW (win->widget)->im_context,
6486                                         NULL);
6487     }
6488
6489   gdk_window_set_user_data (win->window, NULL);
6490   gdk_window_set_user_data (win->bin_window, NULL);
6491   gdk_window_destroy (win->bin_window);
6492   gdk_window_destroy (win->window);
6493   win->window = NULL;
6494   win->bin_window = NULL;
6495 }
6496
6497 static void
6498 text_window_size_allocate (GtkTextWindow *win,
6499                            GdkRectangle  *rect)
6500 {
6501   win->allocation = *rect;
6502
6503   if (win->window)
6504     {
6505       gdk_window_move_resize (win->window,
6506                               rect->x, rect->y,
6507                               rect->width, rect->height);
6508
6509       gdk_window_resize (win->bin_window,
6510                          rect->width, rect->height);
6511     }
6512 }
6513
6514 static void
6515 text_window_scroll        (GtkTextWindow *win,
6516                            gint           dx,
6517                            gint           dy)
6518 {
6519   if (dx != 0 || dy != 0)
6520     {
6521       gdk_window_scroll (win->bin_window, dx, dy);
6522     }
6523 }
6524
6525 static void
6526 text_window_invalidate_rect (GtkTextWindow *win,
6527                              GdkRectangle  *rect)
6528 {
6529   GdkRectangle window_rect;
6530
6531   gtk_text_view_buffer_to_window_coords (GTK_TEXT_VIEW (win->widget),
6532                                          win->type,
6533                                          rect->x,
6534                                          rect->y,
6535                                          &window_rect.x,
6536                                          &window_rect.y);
6537
6538   window_rect.width = rect->width;
6539   window_rect.height = rect->height;
6540
6541   /* Adjust the rect as appropriate */
6542
6543   switch (win->type)
6544     {
6545     case GTK_TEXT_WINDOW_TEXT:
6546       break;
6547
6548     case GTK_TEXT_WINDOW_LEFT:
6549     case GTK_TEXT_WINDOW_RIGHT:
6550       window_rect.x = 0;
6551       window_rect.width = win->allocation.width;
6552       break;
6553
6554     case GTK_TEXT_WINDOW_TOP:
6555     case GTK_TEXT_WINDOW_BOTTOM:
6556       window_rect.y = 0;
6557       window_rect.height = win->allocation.height;
6558       break;
6559
6560     default:
6561       g_warning ("%s: bug!", G_STRLOC);
6562       return;
6563       break;
6564     }
6565
6566   gdk_window_invalidate_rect (win->bin_window, &window_rect, FALSE);
6567
6568 #if 0
6569   {
6570     GdkColor color = { 0, 65535, 0, 0 };
6571     GdkGC *gc = gdk_gc_new (win->bin_window);
6572     gdk_gc_set_rgb_fg_color (gc, &color);
6573     gdk_draw_rectangle (win->bin_window,
6574                         gc, TRUE, window_rect.x, window_rect.y,
6575                         window_rect.width, window_rect.height);
6576     gdk_gc_unref (gc);
6577   }
6578 #endif
6579 }
6580
6581 static gint
6582 text_window_get_width (GtkTextWindow *win)
6583 {
6584   return win->allocation.width;
6585 }
6586
6587 static gint
6588 text_window_get_height (GtkTextWindow *win)
6589 {
6590   return win->allocation.height;
6591 }
6592
6593 static void
6594 text_window_get_allocation (GtkTextWindow *win,
6595                             GdkRectangle  *rect)
6596 {
6597   *rect = win->allocation;
6598 }
6599
6600 /* Windows */
6601
6602
6603 /**
6604  * gtk_text_view_get_window:
6605  * @text_view: a #GtkTextView
6606  * @win: window to get
6607  *
6608  * Retrieves the #GdkWindow corresponding to an area of the text view;
6609  * possible windows include the overall widget window, child windows
6610  * on the left, right, top, bottom, and the window that displays the
6611  * text buffer. Windows are %NULL and nonexistent if their width or
6612  * height is 0, and are nonexistent before the widget has been
6613  * realized.
6614  *
6615  * Return value: a #GdkWindow, or %NULL
6616  **/
6617 GdkWindow*
6618 gtk_text_view_get_window (GtkTextView *text_view,
6619                           GtkTextWindowType win)
6620 {
6621   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
6622
6623   switch (win)
6624     {
6625     case GTK_TEXT_WINDOW_WIDGET:
6626       return GTK_WIDGET (text_view)->window;
6627       break;
6628
6629     case GTK_TEXT_WINDOW_TEXT:
6630       return text_view->text_window->bin_window;
6631       break;
6632
6633     case GTK_TEXT_WINDOW_LEFT:
6634       if (text_view->left_window)
6635         return text_view->left_window->bin_window;
6636       else
6637         return NULL;
6638       break;
6639
6640     case GTK_TEXT_WINDOW_RIGHT:
6641       if (text_view->right_window)
6642         return text_view->right_window->bin_window;
6643       else
6644         return NULL;
6645       break;
6646
6647     case GTK_TEXT_WINDOW_TOP:
6648       if (text_view->top_window)
6649         return text_view->top_window->bin_window;
6650       else
6651         return NULL;
6652       break;
6653
6654     case GTK_TEXT_WINDOW_BOTTOM:
6655       if (text_view->bottom_window)
6656         return text_view->bottom_window->bin_window;
6657       else
6658         return NULL;
6659       break;
6660
6661     case GTK_TEXT_WINDOW_PRIVATE:
6662       g_warning ("%s: You can't get GTK_TEXT_WINDOW_PRIVATE, it has \"PRIVATE\" in the name because it is private.", G_GNUC_FUNCTION);
6663       return NULL;
6664       break;
6665     }
6666
6667   g_warning ("%s: Unknown GtkTextWindowType", G_GNUC_FUNCTION);
6668   return NULL;
6669 }
6670
6671 /**
6672  * gtk_text_view_get_window_type:
6673  * @text_view: a #GtkTextView
6674  * @window: a window type
6675  *
6676  * Usually used to find out which window an event corresponds to.
6677  * If you connect to an event signal on @text_view, this function
6678  * should be called on <literal>event-&gt;window</literal> to
6679  * see which window it was.
6680  *
6681  * Return value: the window type.
6682  **/
6683 GtkTextWindowType
6684 gtk_text_view_get_window_type (GtkTextView *text_view,
6685                                GdkWindow   *window)
6686 {
6687   GtkTextWindow *win;
6688
6689   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
6690   g_return_val_if_fail (GDK_IS_WINDOW (window), 0);
6691
6692   if (window == GTK_WIDGET (text_view)->window)
6693     return GTK_TEXT_WINDOW_WIDGET;
6694
6695   win = g_object_get_qdata (G_OBJECT (window),
6696                             g_quark_try_string ("gtk-text-view-text-window"));
6697
6698   if (win)
6699     return win->type;
6700   else
6701     {
6702       return GTK_TEXT_WINDOW_PRIVATE;
6703     }
6704 }
6705
6706 static void
6707 buffer_to_widget (GtkTextView      *text_view,
6708                   gint              buffer_x,
6709                   gint              buffer_y,
6710                   gint             *window_x,
6711                   gint             *window_y)
6712 {
6713   if (window_x)
6714     {
6715       *window_x = buffer_x - text_view->xoffset;
6716       *window_x += text_view->text_window->allocation.x;
6717     }
6718
6719   if (window_y)
6720     {
6721       *window_y = buffer_y - text_view->yoffset;
6722       *window_y += text_view->text_window->allocation.y;
6723     }
6724 }
6725
6726 static void
6727 widget_to_text_window (GtkTextWindow *win,
6728                        gint           widget_x,
6729                        gint           widget_y,
6730                        gint          *window_x,
6731                        gint          *window_y)
6732 {
6733   if (window_x)
6734     *window_x = widget_x - win->allocation.x;
6735
6736   if (window_y)
6737     *window_y = widget_y - win->allocation.y;
6738 }
6739
6740 static void
6741 buffer_to_text_window (GtkTextView   *text_view,
6742                        GtkTextWindow *win,
6743                        gint           buffer_x,
6744                        gint           buffer_y,
6745                        gint          *window_x,
6746                        gint          *window_y)
6747 {
6748   if (win == NULL)
6749     {
6750       g_warning ("Attempt to convert text buffer coordinates to coordinates "
6751                  "for a nonexistent or private child window of GtkTextView");
6752       return;
6753     }
6754
6755   buffer_to_widget (text_view,
6756                     buffer_x, buffer_y,
6757                     window_x, window_y);
6758
6759   widget_to_text_window (win,
6760                          window_x ? *window_x : 0,
6761                          window_y ? *window_y : 0,
6762                          window_x,
6763                          window_y);
6764 }
6765
6766 /**
6767  * gtk_text_view_buffer_to_window_coords:
6768  * @text_view: a #GtkTextView
6769  * @win: a #GtkTextWindowType
6770  * @buffer_x: buffer x coordinate
6771  * @buffer_y: buffer y coordinate
6772  * @window_x: window x coordinate return location
6773  * @window_y: window y coordinate return location
6774  *
6775  * Converts coordinate (@buffer_x, @buffer_y) to coordinates for the window
6776  * @win, and stores the result in (@window_x, @window_y).
6777  **/
6778 void
6779 gtk_text_view_buffer_to_window_coords (GtkTextView      *text_view,
6780                                        GtkTextWindowType win,
6781                                        gint              buffer_x,
6782                                        gint              buffer_y,
6783                                        gint             *window_x,
6784                                        gint             *window_y)
6785 {
6786   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6787
6788   switch (win)
6789     {
6790     case GTK_TEXT_WINDOW_WIDGET:
6791       buffer_to_widget (text_view,
6792                         buffer_x, buffer_y,
6793                         window_x, window_y);
6794       break;
6795
6796     case GTK_TEXT_WINDOW_TEXT:
6797       if (window_x)
6798         *window_x = buffer_x - text_view->xoffset;
6799       if (window_y)
6800         *window_y = buffer_y - text_view->yoffset;
6801       break;
6802
6803     case GTK_TEXT_WINDOW_LEFT:
6804       buffer_to_text_window (text_view,
6805                              text_view->left_window,
6806                              buffer_x, buffer_y,
6807                              window_x, window_y);
6808       break;
6809
6810     case GTK_TEXT_WINDOW_RIGHT:
6811       buffer_to_text_window (text_view,
6812                              text_view->right_window,
6813                              buffer_x, buffer_y,
6814                              window_x, window_y);
6815       break;
6816
6817     case GTK_TEXT_WINDOW_TOP:
6818       buffer_to_text_window (text_view,
6819                              text_view->top_window,
6820                              buffer_x, buffer_y,
6821                              window_x, window_y);
6822       break;
6823
6824     case GTK_TEXT_WINDOW_BOTTOM:
6825       buffer_to_text_window (text_view,
6826                              text_view->bottom_window,
6827                              buffer_x, buffer_y,
6828                              window_x, window_y);
6829       break;
6830
6831     case GTK_TEXT_WINDOW_PRIVATE:
6832       g_warning ("%s: can't get coords for private windows", G_STRLOC);
6833       break;
6834
6835     default:
6836       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
6837       break;
6838     }
6839 }
6840
6841 static void
6842 widget_to_buffer (GtkTextView *text_view,
6843                   gint         widget_x,
6844                   gint         widget_y,
6845                   gint        *buffer_x,
6846                   gint        *buffer_y)
6847 {
6848   gint focus_edge_width;
6849   gboolean interior_focus;
6850   gint focus_width;
6851
6852   gtk_widget_style_get (GTK_WIDGET (text_view),
6853                         "interior_focus", &interior_focus,
6854                         "focus_line_width", &focus_width,
6855                         NULL);
6856
6857   if (interior_focus)
6858     focus_edge_width = 0;
6859   else
6860     focus_edge_width = focus_width;
6861
6862   if (buffer_x)
6863     {
6864       *buffer_x = widget_x - focus_edge_width + text_view->xoffset;
6865       if (text_view->left_window)
6866         *buffer_x -= text_view->left_window->allocation.width;
6867     }
6868
6869   if (buffer_y)
6870     {
6871       *buffer_y = widget_y - focus_edge_width + text_view->yoffset;
6872       if (text_view->top_window)
6873         *buffer_y -= text_view->top_window->allocation.height;
6874     }
6875 }
6876
6877 static void
6878 text_window_to_widget (GtkTextWindow *win,
6879                        gint           window_x,
6880                        gint           window_y,
6881                        gint          *widget_x,
6882                        gint          *widget_y)
6883 {
6884   if (widget_x)
6885     *widget_x = window_x + win->allocation.x;
6886
6887   if (widget_y)
6888     *widget_y = window_y + win->allocation.y;
6889 }
6890
6891 static void
6892 text_window_to_buffer (GtkTextView   *text_view,
6893                        GtkTextWindow *win,
6894                        gint           window_x,
6895                        gint           window_y,
6896                        gint          *buffer_x,
6897                        gint          *buffer_y)
6898 {
6899   if (win == NULL)
6900     {
6901       g_warning ("Attempt to convert GtkTextView buffer coordinates into "
6902                  "coordinates for a nonexistent child window.");
6903       return;
6904     }
6905
6906   text_window_to_widget (win,
6907                          window_x,
6908                          window_y,
6909                          buffer_x,
6910                          buffer_y);
6911
6912   widget_to_buffer (text_view,
6913                     buffer_x ? *buffer_x : 0,
6914                     buffer_y ? *buffer_y : 0,
6915                     buffer_x,
6916                     buffer_y);
6917 }
6918
6919 /**
6920  * gtk_text_view_window_to_buffer_coords:
6921  * @text_view: a #GtkTextView
6922  * @win: a #GtkTextWindowType
6923  * @window_x: window x coordinate
6924  * @window_y: window y coordinate
6925  * @buffer_x: buffer x coordinate return location
6926  * @buffer_y: buffer y coordinate return location
6927  *
6928  * Converts coordinates on the window identified by @win to buffer
6929  * coordinates, storing the result in (@buffer_x,@buffer_y).
6930  **/
6931 void
6932 gtk_text_view_window_to_buffer_coords (GtkTextView      *text_view,
6933                                        GtkTextWindowType win,
6934                                        gint              window_x,
6935                                        gint              window_y,
6936                                        gint             *buffer_x,
6937                                        gint             *buffer_y)
6938 {
6939   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6940
6941   switch (win)
6942     {
6943     case GTK_TEXT_WINDOW_WIDGET:
6944       widget_to_buffer (text_view,
6945                         window_x, window_y,
6946                         buffer_x, buffer_y);
6947       break;
6948
6949     case GTK_TEXT_WINDOW_TEXT:
6950       if (buffer_x)
6951         *buffer_x = window_x + text_view->xoffset;
6952       if (buffer_y)
6953         *buffer_y = window_y + text_view->yoffset;
6954       break;
6955
6956     case GTK_TEXT_WINDOW_LEFT:
6957       text_window_to_buffer (text_view,
6958                              text_view->left_window,
6959                              window_x, window_y,
6960                              buffer_x, buffer_y);
6961       break;
6962
6963     case GTK_TEXT_WINDOW_RIGHT:
6964       text_window_to_buffer (text_view,
6965                              text_view->right_window,
6966                              window_x, window_y,
6967                              buffer_x, buffer_y);
6968       break;
6969
6970     case GTK_TEXT_WINDOW_TOP:
6971       text_window_to_buffer (text_view,
6972                              text_view->top_window,
6973                              window_x, window_y,
6974                              buffer_x, buffer_y);
6975       break;
6976
6977     case GTK_TEXT_WINDOW_BOTTOM:
6978       text_window_to_buffer (text_view,
6979                              text_view->bottom_window,
6980                              window_x, window_y,
6981                              buffer_x, buffer_y);
6982       break;
6983
6984     case GTK_TEXT_WINDOW_PRIVATE:
6985       g_warning ("%s: can't get coords for private windows", G_STRLOC);
6986       break;
6987
6988     default:
6989       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
6990       break;
6991     }
6992 }
6993
6994 static void
6995 set_window_width (GtkTextView      *text_view,
6996                   gint              width,
6997                   GtkTextWindowType type,
6998                   GtkTextWindow   **winp)
6999 {
7000   if (width == 0)
7001     {
7002       if (*winp)
7003         {
7004           text_window_free (*winp);
7005           *winp = NULL;
7006           gtk_widget_queue_resize (GTK_WIDGET (text_view));
7007         }
7008     }
7009   else
7010     {
7011       if (*winp == NULL)
7012         {
7013           *winp = text_window_new (type,
7014                                    GTK_WIDGET (text_view),
7015                                    width, 0);
7016           /* if the widget is already realized we need to realize the child manually */
7017           if (GTK_WIDGET_REALIZED (text_view))
7018             text_window_realize (*winp, GTK_WIDGET (text_view)->window);
7019         }
7020       else
7021         {
7022           if ((*winp)->requisition.width == width)
7023             return;
7024
7025           (*winp)->requisition.width = width;
7026         }
7027
7028       gtk_widget_queue_resize (GTK_WIDGET (text_view));
7029     }
7030 }
7031
7032
7033 static void
7034 set_window_height (GtkTextView      *text_view,
7035                    gint              height,
7036                    GtkTextWindowType type,
7037                    GtkTextWindow   **winp)
7038 {
7039   if (height == 0)
7040     {
7041       if (*winp)
7042         {
7043           text_window_free (*winp);
7044           *winp = NULL;
7045           gtk_widget_queue_resize (GTK_WIDGET (text_view));
7046         }
7047     }
7048   else
7049     {
7050       if (*winp == NULL)
7051         {
7052           *winp = text_window_new (type,
7053                                    GTK_WIDGET (text_view),
7054                                    0, height);
7055
7056           /* if the widget is already realized we need to realize the child manually */
7057           if (GTK_WIDGET_REALIZED (text_view))
7058             text_window_realize (*winp, GTK_WIDGET (text_view)->window);
7059         }
7060       else
7061         {
7062           if ((*winp)->requisition.height == height)
7063             return;
7064
7065           (*winp)->requisition.height = height;
7066         }
7067
7068       gtk_widget_queue_resize (GTK_WIDGET (text_view));
7069     }
7070 }
7071
7072 /**
7073  * gtk_text_view_set_border_window_size:
7074  * @text_view: a #GtkTextView
7075  * @type: window to affect
7076  * @size: width or height of the window
7077  *
7078  * Sets the width of %GTK_TEXT_WINDOW_LEFT or %GTK_TEXT_WINDOW_RIGHT,
7079  * or the height of %GTK_TEXT_WINDOW_TOP or %GTK_TEXT_WINDOW_BOTTOM.
7080  * Automatically destroys the corresponding window if the size is set
7081  * to 0, and creates the window if the size is set to non-zero.  This
7082  * function can only be used for the "border windows," it doesn't work
7083  * with #GTK_TEXT_WINDOW_WIDGET, #GTK_TEXT_WINDOW_TEXT, or
7084  * #GTK_TEXT_WINDOW_PRIVATE.
7085  **/
7086 void
7087 gtk_text_view_set_border_window_size (GtkTextView      *text_view,
7088                                       GtkTextWindowType type,
7089                                       gint              size)
7090
7091 {
7092   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
7093   g_return_if_fail (size >= 0);
7094
7095   switch (type)
7096     {
7097     case GTK_TEXT_WINDOW_LEFT:
7098       set_window_width (text_view, size, GTK_TEXT_WINDOW_LEFT,
7099                         &text_view->left_window);
7100       break;
7101
7102     case GTK_TEXT_WINDOW_RIGHT:
7103       set_window_width (text_view, size, GTK_TEXT_WINDOW_RIGHT,
7104                         &text_view->right_window);
7105       break;
7106
7107     case GTK_TEXT_WINDOW_TOP:
7108       set_window_height (text_view, size, GTK_TEXT_WINDOW_TOP,
7109                          &text_view->top_window);
7110       break;
7111
7112     case GTK_TEXT_WINDOW_BOTTOM:
7113       set_window_height (text_view, size, GTK_TEXT_WINDOW_BOTTOM,
7114                          &text_view->bottom_window);
7115       break;
7116
7117     default:
7118       g_warning ("Can only set size of left/right/top/bottom border windows with gtk_text_view_set_border_window_size()");
7119       break;
7120     }
7121 }
7122
7123 /**
7124  * gtk_text_view_get_border_window_size:
7125  * @text_view: a #GtkTextView
7126  * @type: window to return size from
7127  *
7128  * Gets the width of the specified border window. See
7129  * gtk_text_view_set_border_window_size().
7130  *
7131  * Return value: width of window
7132  **/
7133 gint
7134 gtk_text_view_get_border_window_size (GtkTextView       *text_view,
7135                                       GtkTextWindowType  type)
7136 {
7137   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
7138
7139   switch (type)
7140     {
7141     case GTK_TEXT_WINDOW_LEFT:
7142       if (text_view->left_window)
7143         return text_view->left_window->requisition.width;
7144
7145     case GTK_TEXT_WINDOW_RIGHT:
7146       if (text_view->right_window)
7147         return text_view->right_window->requisition.width;
7148
7149     case GTK_TEXT_WINDOW_TOP:
7150       if (text_view->top_window)
7151         return text_view->top_window->requisition.height;
7152
7153     case GTK_TEXT_WINDOW_BOTTOM:
7154       if (text_view->bottom_window)
7155         return text_view->bottom_window->requisition.height;
7156
7157     default:
7158       g_warning ("Can only get size of left/right/top/bottom border windows with gtk_text_view_get_border_window_size()");
7159       break;
7160     }
7161
7162   return 0;
7163 }
7164
7165 /*
7166  * Child widgets
7167  */
7168
7169 static GtkTextViewChild*
7170 text_view_child_new_anchored (GtkWidget          *child,
7171                               GtkTextChildAnchor *anchor,
7172                               GtkTextLayout      *layout)
7173 {
7174   GtkTextViewChild *vc;
7175
7176   vc = g_new (GtkTextViewChild, 1);
7177
7178   vc->widget = child;
7179   vc->anchor = anchor;
7180
7181   vc->from_top_of_line = 0;
7182   vc->from_left_of_buffer = 0;
7183
7184   g_object_ref (G_OBJECT (vc->widget));
7185   g_object_ref (G_OBJECT (vc->anchor));
7186
7187   g_object_set_data (G_OBJECT (child),
7188                      "gtk-text-view-child",
7189                      vc);
7190
7191   gtk_text_child_anchor_register_child (anchor, child, layout);
7192
7193   return vc;
7194 }
7195
7196 static GtkTextViewChild*
7197 text_view_child_new_window (GtkWidget          *child,
7198                             GtkTextWindowType   type,
7199                             gint                x,
7200                             gint                y)
7201 {
7202   GtkTextViewChild *vc;
7203
7204   vc = g_new (GtkTextViewChild, 1);
7205
7206   vc->widget = child;
7207   vc->anchor = NULL;
7208
7209   vc->from_top_of_line = 0;
7210   vc->from_left_of_buffer = 0;
7211
7212   g_object_ref (G_OBJECT (vc->widget));
7213
7214   vc->type = type;
7215   vc->x = x;
7216   vc->y = y;
7217
7218   g_object_set_data (G_OBJECT (child),
7219                      "gtk-text-view-child",
7220                      vc);
7221
7222   return vc;
7223 }
7224
7225 static void
7226 text_view_child_free (GtkTextViewChild *child)
7227 {
7228   g_object_set_data (G_OBJECT (child->widget),
7229                      "gtk-text-view-child", NULL);
7230
7231   if (child->anchor)
7232     {
7233       gtk_text_child_anchor_unregister_child (child->anchor,
7234                                               child->widget);
7235       g_object_unref (G_OBJECT (child->anchor));
7236     }
7237
7238   g_object_unref (G_OBJECT (child->widget));
7239
7240   g_free (child);
7241 }
7242
7243 static void
7244 text_view_child_set_parent_window (GtkTextView      *text_view,
7245                                    GtkTextViewChild *vc)
7246 {
7247   if (vc->anchor)
7248     gtk_widget_set_parent_window (vc->widget,
7249                                   text_view->text_window->bin_window);
7250   else
7251     {
7252       GdkWindow *window;
7253       window = gtk_text_view_get_window (text_view,
7254                                          vc->type);
7255       gtk_widget_set_parent_window (vc->widget, window);
7256     }
7257 }
7258
7259 static void
7260 add_child (GtkTextView      *text_view,
7261            GtkTextViewChild *vc)
7262 {
7263   text_view->children = g_slist_prepend (text_view->children,
7264                                          vc);
7265
7266   if (GTK_WIDGET_REALIZED (text_view))
7267     text_view_child_set_parent_window (text_view, vc);
7268
7269   gtk_widget_set_parent (vc->widget, GTK_WIDGET (text_view));
7270 }
7271
7272 /**
7273  * gtk_text_view_add_child_at_anchor:
7274  * @text_view: a #GtkTextView
7275  * @child: a #GtkWidget
7276  * @anchor: a #GtkTextChildAnchor in the #GtkTextBuffer for @text_view
7277  *
7278  * Adds a child widget in the text buffer, at the given @anchor.
7279  *
7280  **/
7281 void
7282 gtk_text_view_add_child_at_anchor (GtkTextView          *text_view,
7283                                    GtkWidget            *child,
7284                                    GtkTextChildAnchor   *anchor)
7285 {
7286   GtkTextViewChild *vc;
7287
7288   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
7289   g_return_if_fail (GTK_IS_WIDGET (child));
7290   g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
7291   g_return_if_fail (child->parent == NULL);
7292
7293   gtk_text_view_ensure_layout (text_view);
7294
7295   vc = text_view_child_new_anchored (child, anchor,
7296                                      text_view->layout);
7297
7298   add_child (text_view, vc);
7299
7300   g_assert (vc->widget == child);
7301   g_assert (gtk_widget_get_parent (child) == GTK_WIDGET (text_view));
7302 }
7303
7304 /**
7305  * gtk_text_view_add_child_in_window:
7306  * @text_view: a #GtkTextView
7307  * @child: a #GtkWidget
7308  * @which_window: which window the child should appear in
7309  * @xpos: X position of child in window coordinates
7310  * @ypos: Y position of child in window coordinates
7311  *
7312  * Adds a child at fixed coordinates in one of the text widget's
7313  * windows.  The window must have nonzero size (see
7314  * gtk_text_view_set_border_window_size()).  Note that the child
7315  * coordinates are given relative to the #GdkWindow in question, and
7316  * that these coordinates have no sane relationship to scrolling. When
7317  * placing a child in #GTK_TEXT_WINDOW_WIDGET, scrolling is
7318  * irrelevant, the child floats above all scrollable areas. But when
7319  * placing a child in one of the scrollable windows (border windows or
7320  * text window), you'll need to compute the child's correct position
7321  * in buffer coordinates any time scrolling occurs or buffer changes
7322  * occur, and then call gtk_text_view_move_child() to update the
7323  * child's position. Unfortunately there's no good way to detect that
7324  * scrolling has occurred, using the current API; a possible hack
7325  * would be to update all child positions when the scroll adjustments
7326  * change or the text buffer changes. See bug 64518 on
7327  * bugzilla.gnome.org for status of fixing this issue.
7328  *
7329  **/
7330 void
7331 gtk_text_view_add_child_in_window (GtkTextView          *text_view,
7332                                    GtkWidget            *child,
7333                                    GtkTextWindowType     which_window,
7334                                    gint                  xpos,
7335                                    gint                  ypos)
7336 {
7337   GtkTextViewChild *vc;
7338
7339   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
7340   g_return_if_fail (GTK_IS_WIDGET (child));
7341   g_return_if_fail (child->parent == NULL);
7342
7343   vc = text_view_child_new_window (child, which_window,
7344                                    xpos, ypos);
7345
7346   add_child (text_view, vc);
7347
7348   g_assert (vc->widget == child);
7349   g_assert (gtk_widget_get_parent (child) == GTK_WIDGET (text_view));
7350 }
7351
7352 /**
7353  * gtk_text_view_move_child:
7354  * @text_view: a #GtkTextView
7355  * @child: child widget already added to the text view
7356  * @xpos: new X position in window coordinates
7357  * @ypos: new Y position in window coordinates
7358  *
7359  * Updates the position of a child, as for gtk_text_view_add_child_in_window().
7360  *
7361  **/
7362 void
7363 gtk_text_view_move_child          (GtkTextView          *text_view,
7364                                    GtkWidget            *child,
7365                                    gint                  xpos,
7366                                    gint                  ypos)
7367 {
7368   GtkTextViewChild *vc;
7369
7370   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
7371   g_return_if_fail (GTK_IS_WIDGET (child));
7372   g_return_if_fail (child->parent == (GtkWidget*) text_view);
7373
7374   vc = g_object_get_data (G_OBJECT (child),
7375                           "gtk-text-view-child");
7376
7377   g_assert (vc != NULL);
7378
7379   if (vc->x == xpos &&
7380       vc->y == ypos)
7381     return;
7382
7383   vc->x = xpos;
7384   vc->y = ypos;
7385
7386   if (GTK_WIDGET_VISIBLE (child) && GTK_WIDGET_VISIBLE (text_view))
7387     gtk_widget_queue_resize (child);
7388 }
7389
7390
7391 /* Iterator operations */
7392
7393 /**
7394  * gtk_text_view_forward_display_line:
7395  * @text_view: a #GtkTextView
7396  * @iter: a #GtkTextIter
7397  *
7398  * Moves the given @iter forward by one display (wrapped) line.  A
7399  * display line is different from a paragraph. Paragraphs are
7400  * separated by newlines or other paragraph separator characters.
7401  * Display lines are created by line-wrapping a paragraph.  If
7402  * wrapping is turned off, display lines and paragraphs will be the
7403  * same. Display lines are divided differently for each view, since
7404  * they depend on the view's width; paragraphs are the same in all
7405  * views, since they depend on the contents of the #GtkTextBuffer.
7406  *
7407  * Return value: %TRUE if @iter was moved and is not on the end iterator
7408  **/
7409 gboolean
7410 gtk_text_view_forward_display_line (GtkTextView *text_view,
7411                                     GtkTextIter *iter)
7412 {
7413   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
7414   g_return_val_if_fail (iter != NULL, FALSE);
7415
7416   gtk_text_view_ensure_layout (text_view);
7417
7418   return gtk_text_layout_move_iter_to_next_line (text_view->layout, iter);
7419 }
7420
7421 /**
7422  * gtk_text_view_backward_display_line:
7423  * @text_view: a #GtkTextView
7424  * @iter: a #GtkTextIter
7425  *
7426  * Moves the given @iter backward by one display (wrapped) line.  A
7427  * display line is different from a paragraph. Paragraphs are
7428  * separated by newlines or other paragraph separator characters.
7429  * Display lines are created by line-wrapping a paragraph.  If
7430  * wrapping is turned off, display lines and paragraphs will be the
7431  * same. Display lines are divided differently for each view, since
7432  * they depend on the view's width; paragraphs are the same in all
7433  * views, since they depend on the contents of the #GtkTextBuffer.
7434  *
7435  * Return value: %TRUE if @iter was moved and is not on the end iterator
7436  **/
7437 gboolean
7438 gtk_text_view_backward_display_line (GtkTextView *text_view,
7439                                      GtkTextIter *iter)
7440 {
7441   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
7442   g_return_val_if_fail (iter != NULL, FALSE);
7443
7444   gtk_text_view_ensure_layout (text_view);
7445
7446   return gtk_text_layout_move_iter_to_previous_line (text_view->layout, iter);
7447 }
7448
7449 /**
7450  * gtk_text_view_forward_display_line_end:
7451  * @text_view: a #GtkTextView
7452  * @iter: a #GtkTextIter
7453  *
7454  * Moves the given @iter forward to the next display line end.  A
7455  * display line is different from a paragraph. Paragraphs are
7456  * separated by newlines or other paragraph separator characters.
7457  * Display lines are created by line-wrapping a paragraph.  If
7458  * wrapping is turned off, display lines and paragraphs will be the
7459  * same. Display lines are divided differently for each view, since
7460  * they depend on the view's width; paragraphs are the same in all
7461  * views, since they depend on the contents of the #GtkTextBuffer.
7462  *
7463  * Return value: %TRUE if @iter was moved and is not on the end iterator
7464  **/
7465 gboolean
7466 gtk_text_view_forward_display_line_end (GtkTextView *text_view,
7467                                         GtkTextIter *iter)
7468 {
7469   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
7470   g_return_val_if_fail (iter != NULL, FALSE);
7471
7472   gtk_text_view_ensure_layout (text_view);
7473
7474   return gtk_text_layout_move_iter_to_line_end (text_view->layout, iter, 1);
7475 }
7476
7477 /**
7478  * gtk_text_view_backward_display_line_start:
7479  * @text_view: a #GtkTextView
7480  * @iter: a #GtkTextIter
7481  *
7482  * Moves the given @iter backward to the next display line start.  A
7483  * display line is different from a paragraph. Paragraphs are
7484  * separated by newlines or other paragraph separator characters.
7485  * Display lines are created by line-wrapping a paragraph.  If
7486  * wrapping is turned off, display lines and paragraphs will be the
7487  * same. Display lines are divided differently for each view, since
7488  * they depend on the view's width; paragraphs are the same in all
7489  * views, since they depend on the contents of the #GtkTextBuffer.
7490  *
7491  * Return value: %TRUE if @iter was moved and is not on the end iterator
7492  **/
7493 gboolean
7494 gtk_text_view_backward_display_line_start (GtkTextView *text_view,
7495                                            GtkTextIter *iter)
7496 {
7497   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
7498   g_return_val_if_fail (iter != NULL, FALSE);
7499
7500   gtk_text_view_ensure_layout (text_view);
7501
7502   return gtk_text_layout_move_iter_to_line_end (text_view->layout, iter, -1);
7503 }
7504
7505 /**
7506  * gtk_text_view_starts_display_line:
7507  * @text_view: a #GtkTextView
7508  * @iter: a #GtkTextIter
7509  *
7510  * Determines whether @iter is at the start of a display line.
7511  * See gtk_text_view_forward_display_line() for an explanation of
7512  * display lines vs. paragraphs.
7513  *
7514  * Return value: %TRUE if @iter begins a wrapped line
7515  **/
7516 gboolean
7517 gtk_text_view_starts_display_line (GtkTextView       *text_view,
7518                                    const GtkTextIter *iter)
7519 {
7520   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
7521   g_return_val_if_fail (iter != NULL, FALSE);
7522
7523   gtk_text_view_ensure_layout (text_view);
7524
7525   return gtk_text_layout_iter_starts_line (text_view->layout, iter);
7526 }
7527
7528 /**
7529  * gtk_text_view_move_visually:
7530  * @text_view: a #GtkTextView
7531  * @iter: a #GtkTextIter
7532  * @count: number of lines to move
7533  *
7534  * Moves @iter up or down by @count display (wrapped) lines.
7535  * See gtk_text_view_forward_display_line() for an explanation of
7536  * display lines vs. paragraphs.
7537  *
7538  * Return value: %TRUE if @iter moved and is not on the end iterator
7539  **/
7540 gboolean
7541 gtk_text_view_move_visually (GtkTextView *text_view,
7542                              GtkTextIter *iter,
7543                              gint         count)
7544 {
7545   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
7546   g_return_val_if_fail (iter != NULL, FALSE);
7547
7548   gtk_text_view_ensure_layout (text_view);
7549
7550   return gtk_text_layout_move_iter_visually (text_view->layout, iter, count);
7551 }