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 "gtkmenu.h"
  36 #include "gtkmenuitem.h"
  37 #include "gtkseparatormenuitem.h"
  38 #include "gtksettings.h"
  39 #include "gtksignal.h"
  40 #include "gtkstock.h"
  41 #include "gtktextdisplay.h"
  42 #include "gtktextview.h"
  43 #include "gtkimmulticontext.h"
  44 #include "gdk/gdkkeysyms.h"
  45 #include <string.h>
  46
  47 /* How scrolling, validation, exposes, etc. work.
  48  *
  49  * The expose_event handler has the invariant that the onscreen lines
  50  * have been validated.
  51  *
  52  * There are two ways that onscreen lines can become invalid. The first
  53  * is to change which lines are onscreen. This happens when the value
  54  * of a scroll adjustment changes. So the code path begins in
  55  * gtk_text_view_value_changed() and goes like this:
  56  *   - gdk_window_scroll() to reflect the new adjustment value
  57  *   - validate the lines that were moved onscreen
  58  *   - gdk_window_process_updates() to handle the exposes immediately
  59  *
  60  * The second way is that you get the "invalidated" signal from the layout,
  61  * indicating that lines have become invalid. This code path begins in
  62  * invalidated_handler() and goes like this:
  63  *   - install high-priority idle which does the rest of the steps
  64  *   - if a scroll is pending from scroll_to_mark(), do the scroll,
  65  *     jumping to the gtk_text_view_value_changed() code path
  66  *   - otherwise, validate the onscreen lines
  67  *   - DO NOT process updates
  68  *
  69  * In both cases, validating the onscreen lines can trigger a scroll
  70  * due to maintaining the first_para on the top of the screen.
  71  * If validation triggers a scroll, we jump to the top of the code path
  72  * for value_changed, and bail out of the current code path.
  73  *
  74  * Also, in size_allocate, if we invalidate some lines from changing
  75  * the layout width, we need to go ahead and run the high-priority idle,
  76  * because GTK sends exposes right after doing the size allocates without
  77  * returning to the main loop. This is also why the high-priority idle
  78  * is at a higher priority than resizing.
  79  *
  80  */
  81
  82 #define SCREEN_WIDTH(widget) text_window_get_width (GTK_TEXT_VIEW (widget)->text_window)
  83 #define SCREEN_HEIGHT(widget) text_window_get_height (GTK_TEXT_VIEW (widget)->text_window)
  84
  85 #if 0
  86 #define DEBUG_VALIDATION_AND_SCROLLING
  87 #endif
  88
  89 #ifdef DEBUG_VALIDATION_AND_SCROLLING
  90 #define DV(x) (x)
  91 #else
  92 #define DV(x)
  93 #endif
  94
  95 struct _GtkTextPendingScroll
  96 {
  97   GtkTextMark   *mark;
  98   gdouble        within_margin;
  99   gboolean       use_align;
 100   gdouble        xalign;
 101   gdouble        yalign;
 102 };
 103
 104 enum
 105 {
 106   SET_SCROLL_ADJUSTMENTS,
 107   POPULATE_POPUP,
 108   MOVE_CURSOR,
 109   SET_ANCHOR,
 110   INSERT_AT_CURSOR,
 111   DELETE_FROM_CURSOR,
 112   CUT_CLIPBOARD,
 113   COPY_CLIPBOARD,
 114   PASTE_CLIPBOARD,
 115   TOGGLE_OVERWRITE,
 116   LAST_SIGNAL
 117 };
 118
 119 enum
 120 {
 121   PROP_0,
 122   PROP_PIXELS_ABOVE_LINES,
 123   PROP_PIXELS_BELOW_LINES,
 124   PROP_PIXELS_INSIDE_WRAP,
 125   PROP_EDITABLE,
 126   PROP_WRAP_MODE,
 127   PROP_JUSTIFICATION,
 128   PROP_LEFT_MARGIN,
 129   PROP_RIGHT_MARGIN,
 130   PROP_INDENT,
 131   PROP_TABS,
 132   PROP_CURSOR_VISIBLE,
 133   LAST_PROP
 134 };
 135
 136 static void gtk_text_view_init                 (GtkTextView      *text_view);
 137 static void gtk_text_view_class_init           (GtkTextViewClass *klass);
 138 static void gtk_text_view_destroy              (GtkObject        *object);
 139 static void gtk_text_view_finalize             (GObject          *object);
 140 static void gtk_text_view_set_property         (GObject         *object,
 141                                                 guint            prop_id,
 142                                                 const GValue    *value,
 143                                                 GParamSpec      *pspec);
 144 static void gtk_text_view_get_property         (GObject         *object,
 145                                                 guint            prop_id,
 146                                                 GValue          *value,
 147                                                 GParamSpec      *pspec);
 148 static void gtk_text_view_size_request         (GtkWidget        *widget,
 149                                                 GtkRequisition   *requisition);
 150 static void gtk_text_view_size_allocate        (GtkWidget        *widget,
 151                                                 GtkAllocation    *allocation);
 152 static void gtk_text_view_realize              (GtkWidget        *widget);
 153 static void gtk_text_view_unrealize            (GtkWidget        *widget);
 154 static void gtk_text_view_style_set            (GtkWidget        *widget,
 155                                                 GtkStyle         *previous_style);
 156 static void gtk_text_view_direction_changed    (GtkWidget        *widget,
 157                                                 GtkTextDirection  previous_direction);
 158 static gint gtk_text_view_event                (GtkWidget        *widget,
 159                                                 GdkEvent         *event);
 160 static gint gtk_text_view_key_press_event      (GtkWidget        *widget,
 161                                                 GdkEventKey      *event);
 162 static gint gtk_text_view_key_release_event    (GtkWidget        *widget,
 163                                                 GdkEventKey      *event);
 164 static gint gtk_text_view_button_press_event   (GtkWidget        *widget,
 165                                                 GdkEventButton   *event);
 166 static gint gtk_text_view_button_release_event (GtkWidget        *widget,
 167                                                 GdkEventButton   *event);
 168 static gint gtk_text_view_focus_in_event       (GtkWidget        *widget,
 169                                                 GdkEventFocus    *event);
 170 static gint gtk_text_view_focus_out_event      (GtkWidget        *widget,
 171                                                 GdkEventFocus    *event);
 172 static gint gtk_text_view_motion_event         (GtkWidget        *widget,
 173                                                 GdkEventMotion   *event);
 174 static gint gtk_text_view_expose_event         (GtkWidget        *widget,
 175                                                 GdkEventExpose   *expose);
 176 static void gtk_text_view_draw_focus           (GtkWidget        *widget);
 177 static void gtk_text_view_grab_focus           (GtkWidget        *widget);
 178
 179 /* Source side drag signals */
 180 static void gtk_text_view_drag_begin       (GtkWidget        *widget,
 181                                             GdkDragContext   *context);
 182 static void gtk_text_view_drag_end         (GtkWidget        *widget,
 183                                             GdkDragContext   *context);
 184 static void gtk_text_view_drag_data_get    (GtkWidget        *widget,
 185                                             GdkDragContext   *context,
 186                                             GtkSelectionData *selection_data,
 187                                             guint             info,
 188                                             guint             time);
 189 static void gtk_text_view_drag_data_delete (GtkWidget        *widget,
 190                                             GdkDragContext   *context);
 191
 192 /* Target side drag signals */
 193 static void     gtk_text_view_drag_leave         (GtkWidget        *widget,
 194                                                   GdkDragContext   *context,
 195                                                   guint             time);
 196 static gboolean gtk_text_view_drag_motion        (GtkWidget        *widget,
 197                                                   GdkDragContext   *context,
 198                                                   gint              x,
 199                                                   gint              y,
 200                                                   guint             time);
 201 static gboolean gtk_text_view_drag_drop          (GtkWidget        *widget,
 202                                                   GdkDragContext   *context,
 203                                                   gint              x,
 204                                                   gint              y,
 205                                                   guint             time);
 206 static void     gtk_text_view_drag_data_received (GtkWidget        *widget,
 207                                                   GdkDragContext   *context,
 208                                                   gint              x,
 209                                                   gint              y,
 210                                                   GtkSelectionData *selection_data,
 211                                                   guint             info,
 212                                                   guint             time);
 213
 214 static void gtk_text_view_set_scroll_adjustments (GtkTextView   *text_view,
 215                                                   GtkAdjustment *hadj,
 216                                                   GtkAdjustment *vadj);
 217 static void gtk_text_view_popup_menu             (GtkWidget     *widget);
 218
 219 static void gtk_text_view_move_cursor      (GtkTextView           *text_view,
 220                                             GtkMovementStep        step,
 221                                             gint                   count,
 222                                             gboolean               extend_selection);
 223 static void gtk_text_view_set_anchor       (GtkTextView           *text_view);
 224 static void gtk_text_view_scroll_pages     (GtkTextView           *text_view,
 225                                             gint                   count);
 226 static void gtk_text_view_insert_at_cursor (GtkTextView           *text_view,
 227                                             const gchar           *str);
 228 static void gtk_text_view_delete_from_cursor (GtkTextView           *text_view,
 229                                               GtkDeleteType          type,
 230                                               gint                   count);
 231 static void gtk_text_view_cut_clipboard    (GtkTextView           *text_view);
 232 static void gtk_text_view_copy_clipboard   (GtkTextView           *text_view);
 233 static void gtk_text_view_paste_clipboard  (GtkTextView           *text_view);
 234 static void gtk_text_view_toggle_overwrite (GtkTextView           *text_view);
 235 static void gtk_text_view_unselect         (GtkTextView           *text_view);
 236
 237 static void     gtk_text_view_validate_onscreen     (GtkTextView        *text_view);
 238 static void     gtk_text_view_get_first_para_iter   (GtkTextView        *text_view,
 239                                                      GtkTextIter        *iter);
 240 static void     gtk_text_view_update_layout_width       (GtkTextView        *text_view);
 241 static void     gtk_text_view_set_attributes_from_style (GtkTextView        *text_view,
 242                                                          GtkTextAttributes *values,
 243                                                          GtkStyle           *style);
 244 static void     gtk_text_view_ensure_layout          (GtkTextView        *text_view);
 245 static void     gtk_text_view_destroy_layout         (GtkTextView        *text_view);
 246 static void     gtk_text_view_check_keymap_direction (GtkTextView        *text_view);
 247 static void     gtk_text_view_reset_im_context       (GtkTextView        *text_view);
 248 static void     gtk_text_view_start_selection_drag   (GtkTextView        *text_view,
 249                                                       const GtkTextIter  *iter,
 250                                                       GdkEventButton     *event);
 251 static gboolean gtk_text_view_end_selection_drag     (GtkTextView        *text_view,
 252                                                       GdkEventButton     *event);
 253 static void     gtk_text_view_start_selection_dnd    (GtkTextView        *text_view,
 254                                                       const GtkTextIter  *iter,
 255                                                       GdkEventMotion     *event);
 256 static void     gtk_text_view_check_cursor_blink     (GtkTextView        *text_view);
 257 static void     gtk_text_view_pend_cursor_blink      (GtkTextView        *text_view);
 258 static void     gtk_text_view_stop_cursor_blink      (GtkTextView        *text_view);
 259
 260 static void     gtk_text_view_value_changed                (GtkAdjustment *adj,
 261                                                             GtkTextView   *view);
 262 static void     gtk_text_view_commit_handler               (GtkIMContext  *context,
 263                                                             const gchar   *str,
 264                                                             GtkTextView   *text_view);
 265 static void     gtk_text_view_preedit_changed_handler      (GtkIMContext  *context,
 266                                                             GtkTextView   *text_view);
 267 static gboolean gtk_text_view_retrieve_surrounding_handler (GtkIMContext  *context,
 268                                                             GtkTextView   *text_view);
 269 static gboolean gtk_text_view_delete_surrounding_handler   (GtkIMContext  *context,
 270                                                             gint           offset,
 271                                                             gint           n_chars,
 272                                                             GtkTextView   *text_view);
 273
 274 static void gtk_text_view_mark_set_handler       (GtkTextBuffer     *buffer,
 275                                                   const GtkTextIter *location,
 276                                                   GtkTextMark       *mark,
 277                                                   gpointer           data);
 278 static void gtk_text_view_get_virtual_cursor_pos (GtkTextView       *text_view,
 279                                                   gint              *x,
 280                                                   gint              *y);
 281 static void gtk_text_view_set_virtual_cursor_pos (GtkTextView       *text_view,
 282                                                   gint               x,
 283                                                   gint               y);
 284
 285 static GtkAdjustment* get_hadjustment            (GtkTextView       *text_view);
 286 static GtkAdjustment* get_vadjustment            (GtkTextView       *text_view);
 287
 288 static void gtk_text_view_do_popup               (GtkTextView       *text_view,
 289                                                   GdkEventButton    *event);
 290
 291 static void gtk_text_view_queue_scroll           (GtkTextView   *text_view,
 292                                                   GtkTextMark   *mark,
 293                                                   gdouble        within_margin,
 294                                                   gboolean       use_align,
 295                                                   gdouble        xalign,
 296                                                   gdouble        yalign);
 297
 298 static gboolean gtk_text_view_flush_scroll       (GtkTextView *text_view);
 299 static void     gtk_text_view_update_adjustments (GtkTextView *text_view);
 300 static void     gtk_text_view_invalidate         (GtkTextView *text_view);
 301
 302 static void gtk_text_view_update_im_spot_location (GtkTextView *text_view);
 303
 304 /* Container methods */
 305 static void gtk_text_view_add    (GtkContainer *container,
 306                                   GtkWidget    *child);
 307 static void gtk_text_view_remove (GtkContainer *container,
 308                                   GtkWidget    *child);
 309 static void gtk_text_view_forall (GtkContainer *container,
 310                                   gboolean      include_internals,
 311                                   GtkCallback   callback,
 312                                   gpointer      callback_data);
 313
 314 /* FIXME probably need the focus methods. */
 315
 316 typedef struct _GtkTextViewChild GtkTextViewChild;
 317
 318 struct _GtkTextViewChild
 319 {
 320   GtkWidget *widget;
 321
 322   GtkTextChildAnchor *anchor;
 323
 324   gint from_top_of_line;
 325   gint from_left_of_buffer;
 326
 327   /* These are ignored if anchor != NULL */
 328   GtkTextWindowType type;
 329   gint x;
 330   gint y;
 331 };
 332
 333 static GtkTextViewChild* text_view_child_new_anchored      (GtkWidget          *child,
 334                                                             GtkTextChildAnchor *anchor,
 335                                                             GtkTextLayout      *layout);
 336 static GtkTextViewChild* text_view_child_new_window        (GtkWidget          *child,
 337                                                             GtkTextWindowType   type,
 338                                                             gint                x,
 339                                                             gint                y);
 340 static void              text_view_child_free              (GtkTextViewChild   *child);
 341 static void              text_view_child_set_parent_window (GtkTextView        *text_view,
 342                                                             GtkTextViewChild   *child);
 343
 344 struct _GtkTextWindow
 345 {
 346   GtkTextWindowType type;
 347   GtkWidget *widget;
 348   GdkWindow *window;
 349   GdkWindow *bin_window;
 350   GtkRequisition requisition;
 351   GdkRectangle allocation;
 352 };
 353
 354 static GtkTextWindow *text_window_new             (GtkTextWindowType  type,
 355                                                    GtkWidget         *widget,
 356                                                    gint               width_request,
 357                                                    gint               height_request);
 358 static void           text_window_free            (GtkTextWindow     *win);
 359 static void           text_window_realize         (GtkTextWindow     *win,
 360                                                    GdkWindow         *parent);
 361 static void           text_window_unrealize       (GtkTextWindow     *win);
 362 static void           text_window_size_allocate   (GtkTextWindow     *win,
 363                                                    GdkRectangle      *rect);
 364 static void           text_window_scroll          (GtkTextWindow     *win,
 365                                                    gint               dx,
 366                                                    gint               dy);
 367 static void           text_window_invalidate_rect (GtkTextWindow     *win,
 368                                                    GdkRectangle      *rect);
 369
 370 static gint           text_window_get_width       (GtkTextWindow     *win);
 371 static gint           text_window_get_height      (GtkTextWindow     *win);
 372 static void           text_window_get_allocation  (GtkTextWindow     *win,
 373                                                    GdkRectangle      *rect);
 374
 375
 376 enum
 377 {
 378   TARGET_STRING,
 379   TARGET_TEXT,
 380   TARGET_COMPOUND_TEXT,
 381   TARGET_UTF8_STRING,
 382   TARGET_TEXT_BUFFER_CONTENTS
 383 };
 384
 385 static GtkTargetEntry target_table[] = {
 386   { "GTK_TEXT_BUFFER_CONTENTS", GTK_TARGET_SAME_APP,
 387     TARGET_TEXT_BUFFER_CONTENTS },
 388   { "UTF8_STRING", 0, TARGET_UTF8_STRING },
 389   { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
 390   { "TEXT", 0, TARGET_TEXT },
 391   { "text/plain", 0, TARGET_STRING },
 392   { "STRING",     0, TARGET_STRING }
 393 };
 394
 395 static GtkContainerClass *parent_class = NULL;
 396 static guint signals[LAST_SIGNAL] = { 0 };
 397
 398 GtkType
 399 gtk_text_view_get_type (void)
 400 {
 401   static GtkType our_type = 0;
 402
 403   if (our_type == 0)
 404     {
 405       static const GtkTypeInfo our_info =
 406       {
 407         "GtkTextView",
 408         sizeof (GtkTextView),
 409         sizeof (GtkTextViewClass),
 410         (GtkClassInitFunc) gtk_text_view_class_init,
 411         (GtkObjectInitFunc) gtk_text_view_init,
 412         /* reserved_1 */ NULL,
 413         /* reserved_2 */ NULL,
 414         (GtkClassInitFunc) NULL
 415       };
 416
 417       our_type = gtk_type_unique (GTK_TYPE_CONTAINER, &our_info);
 418     }
 419
 420   return our_type;
 421 }
 422
 423 static void
 424 add_move_binding (GtkBindingSet  *binding_set,
 425                   guint           keyval,
 426                   guint           modmask,
 427                   GtkMovementStep step,
 428                   gint            count)
 429 {
 430   g_return_if_fail ((modmask & GDK_SHIFT_MASK) == 0);
 431
 432   gtk_binding_entry_add_signal (binding_set, keyval, modmask,
 433                                 "move_cursor", 3,
 434                                 GTK_TYPE_ENUM, step,
 435                                 GTK_TYPE_INT, count,
 436                                 GTK_TYPE_BOOL, FALSE);
 437
 438   /* Selection-extending version */
 439   gtk_binding_entry_add_signal (binding_set, keyval, modmask | GDK_SHIFT_MASK,
 440                                 "move_cursor", 3,
 441                                 GTK_TYPE_ENUM, step,
 442                                 GTK_TYPE_INT, count,
 443                                 GTK_TYPE_BOOL, TRUE);
 444 }
 445
 446 static void
 447 gtk_text_view_class_init (GtkTextViewClass *klass)
 448 {
 449   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 450   GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass);
 451   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 452   GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
 453   GtkBindingSet *binding_set;
 454
 455   parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
 456
 457   /* Default handlers and virtual methods
 458    */
 459   gobject_class->set_property = gtk_text_view_set_property;
 460   gobject_class->get_property = gtk_text_view_get_property;
 461
 462   object_class->destroy = gtk_text_view_destroy;
 463   gobject_class->finalize = gtk_text_view_finalize;
 464
 465   widget_class->realize = gtk_text_view_realize;
 466   widget_class->unrealize = gtk_text_view_unrealize;
 467   widget_class->style_set = gtk_text_view_style_set;
 468   widget_class->direction_changed = gtk_text_view_direction_changed;
 469   widget_class->size_request = gtk_text_view_size_request;
 470   widget_class->size_allocate = gtk_text_view_size_allocate;
 471   widget_class->event = gtk_text_view_event;
 472   widget_class->key_press_event = gtk_text_view_key_press_event;
 473   widget_class->key_release_event = gtk_text_view_key_release_event;
 474   widget_class->button_press_event = gtk_text_view_button_press_event;
 475   widget_class->button_release_event = gtk_text_view_button_release_event;
 476   widget_class->focus_in_event = gtk_text_view_focus_in_event;
 477   widget_class->focus_out_event = gtk_text_view_focus_out_event;
 478   widget_class->motion_notify_event = gtk_text_view_motion_event;
 479   widget_class->expose_event = gtk_text_view_expose_event;
 480   widget_class->grab_focus = gtk_text_view_grab_focus;
 481
 482   widget_class->drag_begin = gtk_text_view_drag_begin;
 483   widget_class->drag_end = gtk_text_view_drag_end;
 484   widget_class->drag_data_get = gtk_text_view_drag_data_get;
 485   widget_class->drag_data_delete = gtk_text_view_drag_data_delete;
 486
 487   widget_class->drag_leave = gtk_text_view_drag_leave;
 488   widget_class->drag_motion = gtk_text_view_drag_motion;
 489   widget_class->drag_drop = gtk_text_view_drag_drop;
 490   widget_class->drag_data_received = gtk_text_view_drag_data_received;
 491
 492   widget_class->popup_menu = gtk_text_view_popup_menu;
 493
 494   container_class->add = gtk_text_view_add;
 495   container_class->remove = gtk_text_view_remove;
 496   container_class->forall = gtk_text_view_forall;
 497
 498   klass->move_cursor = gtk_text_view_move_cursor;
 499   klass->set_anchor = gtk_text_view_set_anchor;
 500   klass->insert_at_cursor = gtk_text_view_insert_at_cursor;
 501   klass->delete_from_cursor = gtk_text_view_delete_from_cursor;
 502   klass->cut_clipboard = gtk_text_view_cut_clipboard;
 503   klass->copy_clipboard = gtk_text_view_copy_clipboard;
 504   klass->paste_clipboard = gtk_text_view_paste_clipboard;
 505   klass->toggle_overwrite = gtk_text_view_toggle_overwrite;
 506   klass->set_scroll_adjustments = gtk_text_view_set_scroll_adjustments;
 507
 508   /*
 509    * Properties
 510    */
 511
 512   g_object_class_install_property (gobject_class,
 513                                    PROP_PIXELS_ABOVE_LINES,
 514                                    g_param_spec_int ("pixels_above_lines",
 515                                                      _("Pixels Above Lines"),
 516                                                      _("Pixels of blank space above paragraphs"),
 517                                                      0,
 518                                                      G_MAXINT,
 519                                                      0,
 520                                                      G_PARAM_READWRITE));
 521
 522   g_object_class_install_property (gobject_class,
 523                                    PROP_PIXELS_BELOW_LINES,
 524                                    g_param_spec_int ("pixels_below_lines",
 525                                                      _("Pixels Below Lines"),
 526                                                      _("Pixels of blank space below paragraphs"),
 527                                                      0,
 528                                                      G_MAXINT,
 529                                                      0,
 530                                                      G_PARAM_READWRITE));
 531
 532   g_object_class_install_property (gobject_class,
 533                                    PROP_PIXELS_INSIDE_WRAP,
 534                                    g_param_spec_int ("pixels_inside_wrap",
 535                                                      _("Pixels Inside Wrap"),
 536                                                      _("Pixels of blank space between wrapped lines in a paragraph"),
 537                                                      0,
 538                                                      G_MAXINT,
 539                                                      0,
 540                                                      G_PARAM_READWRITE));
 541
 542   g_object_class_install_property (gobject_class,
 543                                    PROP_EDITABLE,
 544                                    g_param_spec_boolean ("editable",
 545                                                          _("Editable"),
 546                                                          _("Whether the text can be modified by the user"),
 547                                                          TRUE,
 548                                                          G_PARAM_READWRITE));
 549
 550   g_object_class_install_property (gobject_class,
 551                                    PROP_WRAP_MODE,
 552                                    g_param_spec_enum ("wrap_mode",
 553                                                       _("Wrap Mode"),
 554                                                       _("Whether to wrap lines never, at word boundaries, or at character boundaries"),
 555                                                       GTK_TYPE_WRAP_MODE,
 556                                                       GTK_WRAP_NONE,
 557                                                       G_PARAM_READWRITE));
 558
 559   g_object_class_install_property (gobject_class,
 560                                    PROP_JUSTIFICATION,
 561                                    g_param_spec_enum ("justification",
 562                                                       _("Justification"),
 563                                                       _("Left, right, or center justification"),
 564                                                       GTK_TYPE_JUSTIFICATION,
 565                                                       GTK_JUSTIFY_LEFT,
 566                                                       G_PARAM_READWRITE));
 567
 568   g_object_class_install_property (gobject_class,
 569                                    PROP_LEFT_MARGIN,
 570                                    g_param_spec_int ("left_margin",
 571                                                      _("Left Margin"),
 572                                                      _("Width of the left margin in pixels"),
 573                                                      0,
 574                                                      G_MAXINT,
 575                                                      0,
 576                                                      G_PARAM_READWRITE));
 577
 578   g_object_class_install_property (gobject_class,
 579                                    PROP_RIGHT_MARGIN,
 580                                    g_param_spec_int ("right_margin",
 581                                                      _("Right Margin"),
 582                                                      _("Width of the right margin in pixels"),
 583                                                      0,
 584                                                      G_MAXINT,
 585                                                      0,
 586                                                      G_PARAM_READWRITE));
 587
 588   g_object_class_install_property (gobject_class,
 589                                    PROP_INDENT,
 590                                    g_param_spec_int ("indent",
 591                                                      _("Indent"),
 592                                                      _("Amount to indent the paragraph, in pixels"),
 593                                                      0,
 594                                                      G_MAXINT,
 595                                                      0,
 596                                                      G_PARAM_READWRITE));
 597
 598   g_object_class_install_property (gobject_class,
 599                                    PROP_TABS,
 600                                    g_param_spec_boxed ("tabs",
 601                                                        _("Tabs"),
 602                                                        _("Custom tabs for this text"),
 603                                                        PANGO_TYPE_TAB_ARRAY,
 604                                                        G_PARAM_READWRITE));
 605
 606   g_object_class_install_property (gobject_class,
 607                                    PROP_CURSOR_VISIBLE,
 608                                    g_param_spec_boolean ("cursor_visible",
 609                                                          _("Cursor Visible"),
 610                                                          _("If the insertion cursor is shown"),
 611                                                          TRUE,
 612                                                          G_PARAM_READWRITE));
 613
 614
 615   /*
 616    * Style properties
 617    */
 618
 619   gtk_widget_class_install_style_property (widget_class,
 620                                            g_param_spec_boxed ("cursor_color",
 621                                                                _("Cursor color"),
 622                                                                _("Color with which to draw insertion cursor"),
 623                                                                GDK_TYPE_COLOR,
 624                                                                G_PARAM_READABLE));
 625
 626
 627   /*
 628    * Signals
 629    */
 630
 631   signals[MOVE_CURSOR] =
 632     gtk_signal_new ("move_cursor",
 633                     GTK_RUN_LAST | GTK_RUN_ACTION,
 634                     GTK_CLASS_TYPE (object_class),
 635                     GTK_SIGNAL_OFFSET (GtkTextViewClass, move_cursor),
 636                     gtk_marshal_VOID__ENUM_INT_BOOLEAN,
 637                     GTK_TYPE_NONE, 3, GTK_TYPE_MOVEMENT_STEP, GTK_TYPE_INT, GTK_TYPE_BOOL);
 638
 639   signals[SET_ANCHOR] =
 640     gtk_signal_new ("set_anchor",
 641                     GTK_RUN_LAST | GTK_RUN_ACTION,
 642                     GTK_CLASS_TYPE (object_class),
 643                     GTK_SIGNAL_OFFSET (GtkTextViewClass, set_anchor),
 644                     gtk_marshal_VOID__VOID,
 645                     GTK_TYPE_NONE, 0);
 646
 647   signals[INSERT_AT_CURSOR] =
 648     gtk_signal_new ("insert_at_cursor",
 649                     GTK_RUN_LAST | GTK_RUN_ACTION,
 650                     GTK_CLASS_TYPE (object_class),
 651                     GTK_SIGNAL_OFFSET (GtkTextViewClass, insert_at_cursor),
 652                     gtk_marshal_VOID__STRING,
 653                     GTK_TYPE_NONE, 1, GTK_TYPE_STRING);
 654
 655   signals[DELETE_FROM_CURSOR] =
 656     gtk_signal_new ("delete_from_cursor",
 657                     GTK_RUN_LAST | GTK_RUN_ACTION,
 658                     GTK_CLASS_TYPE (object_class),
 659                     GTK_SIGNAL_OFFSET (GtkTextViewClass, delete_from_cursor),
 660                     gtk_marshal_VOID__ENUM_INT,
 661                     GTK_TYPE_NONE, 2, GTK_TYPE_DELETE_TYPE, GTK_TYPE_INT);
 662
 663   signals[CUT_CLIPBOARD] =
 664     gtk_signal_new ("cut_clipboard",
 665                     GTK_RUN_LAST | GTK_RUN_ACTION,
 666                     GTK_CLASS_TYPE (object_class),
 667                     GTK_SIGNAL_OFFSET (GtkTextViewClass, cut_clipboard),
 668                     gtk_marshal_VOID__VOID,
 669                     GTK_TYPE_NONE, 0);
 670
 671   signals[COPY_CLIPBOARD] =
 672     gtk_signal_new ("copy_clipboard",
 673                     GTK_RUN_LAST | GTK_RUN_ACTION,
 674                     GTK_CLASS_TYPE (object_class),
 675                     GTK_SIGNAL_OFFSET (GtkTextViewClass, copy_clipboard),
 676                     gtk_marshal_VOID__VOID,
 677                     GTK_TYPE_NONE, 0);
 678
 679   signals[PASTE_CLIPBOARD] =
 680     gtk_signal_new ("paste_clipboard",
 681                     GTK_RUN_LAST | GTK_RUN_ACTION,
 682                     GTK_CLASS_TYPE (object_class),
 683                     GTK_SIGNAL_OFFSET (GtkTextViewClass, paste_clipboard),
 684                     gtk_marshal_VOID__VOID,
 685                     GTK_TYPE_NONE, 0);
 686
 687   signals[TOGGLE_OVERWRITE] =
 688     gtk_signal_new ("toggle_overwrite",
 689                     GTK_RUN_LAST | GTK_RUN_ACTION,
 690                     GTK_CLASS_TYPE (object_class),
 691                     GTK_SIGNAL_OFFSET (GtkTextViewClass, toggle_overwrite),
 692                     gtk_marshal_VOID__VOID,
 693                     GTK_TYPE_NONE, 0);
 694
 695   signals[SET_SCROLL_ADJUSTMENTS] =
 696     gtk_signal_new ("set_scroll_adjustments",
 697                     GTK_RUN_LAST,
 698                     GTK_CLASS_TYPE (object_class),
 699                     GTK_SIGNAL_OFFSET (GtkTextViewClass, set_scroll_adjustments),
 700                     gtk_marshal_VOID__OBJECT_OBJECT,
 701                     GTK_TYPE_NONE, 2, GTK_TYPE_ADJUSTMENT, GTK_TYPE_ADJUSTMENT);
 702   widget_class->set_scroll_adjustments_signal = signals[SET_SCROLL_ADJUSTMENTS];
 703
 704   signals[POPULATE_POPUP] =
 705     gtk_signal_new ("populate_popup",
 706                     GTK_RUN_LAST,
 707                     GTK_CLASS_TYPE (object_class),
 708                     GTK_SIGNAL_OFFSET (GtkTextViewClass, populate_popup),
 709                     gtk_marshal_VOID__OBJECT,
 710                     GTK_TYPE_NONE, 1, GTK_TYPE_MENU);
 711
 712   /*
 713    * Key bindings
 714    */
 715
 716   binding_set = gtk_binding_set_by_class (klass);
 717
 718   /* Moving the insertion point */
 719   add_move_binding (binding_set, GDK_Right, 0,
 720                     GTK_MOVEMENT_VISUAL_POSITIONS, 1);
 721
 722   add_move_binding (binding_set, GDK_KP_Right, 0,
 723                     GTK_MOVEMENT_VISUAL_POSITIONS, 1);
 724
 725   add_move_binding (binding_set, GDK_Left, 0,
 726                     GTK_MOVEMENT_VISUAL_POSITIONS, -1);
 727
 728   add_move_binding (binding_set, GDK_KP_Left, 0,
 729                     GTK_MOVEMENT_VISUAL_POSITIONS, -1);
 730
 731   add_move_binding (binding_set, GDK_f, GDK_CONTROL_MASK,
 732                     GTK_MOVEMENT_LOGICAL_POSITIONS, 1);
 733
 734   add_move_binding (binding_set, GDK_b, GDK_CONTROL_MASK,
 735                     GTK_MOVEMENT_LOGICAL_POSITIONS, -1);
 736
 737   add_move_binding (binding_set, GDK_Right, GDK_CONTROL_MASK,
 738                     GTK_MOVEMENT_WORDS, 1);
 739
 740   add_move_binding (binding_set, GDK_KP_Right, GDK_CONTROL_MASK,
 741                     GTK_MOVEMENT_WORDS, 1);
 742
 743   add_move_binding (binding_set, GDK_Left, GDK_CONTROL_MASK,
 744                     GTK_MOVEMENT_WORDS, -1);
 745
 746   add_move_binding (binding_set, GDK_KP_Left, GDK_CONTROL_MASK,
 747                     GTK_MOVEMENT_WORDS, 1);
 748
 749   /* Eventually we want to move by display lines, not paragraphs */
 750   add_move_binding (binding_set, GDK_Up, 0,
 751                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 752
 753   add_move_binding (binding_set, GDK_KP_Up, 0,
 754                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 755
 756   add_move_binding (binding_set, GDK_Down, 0,
 757                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 758
 759   add_move_binding (binding_set, GDK_KP_Down, 0,
 760                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 761
 762   add_move_binding (binding_set, GDK_p, GDK_CONTROL_MASK,
 763                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 764
 765   add_move_binding (binding_set, GDK_n, GDK_CONTROL_MASK,
 766                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 767
 768   add_move_binding (binding_set, GDK_Up, GDK_CONTROL_MASK,
 769                     GTK_MOVEMENT_PARAGRAPHS, -1);
 770
 771   add_move_binding (binding_set, GDK_KP_Up, GDK_CONTROL_MASK,
 772                     GTK_MOVEMENT_PARAGRAPHS, -1);
 773
 774   add_move_binding (binding_set, GDK_Down, GDK_CONTROL_MASK,
 775                     GTK_MOVEMENT_PARAGRAPHS, 1);
 776
 777   add_move_binding (binding_set, GDK_KP_Down, GDK_CONTROL_MASK,
 778                     GTK_MOVEMENT_PARAGRAPHS, 1);
 779
 780   add_move_binding (binding_set, GDK_a, GDK_CONTROL_MASK,
 781                     GTK_MOVEMENT_PARAGRAPH_ENDS, -1);
 782
 783   add_move_binding (binding_set, GDK_e, GDK_CONTROL_MASK,
 784                     GTK_MOVEMENT_PARAGRAPH_ENDS, 1);
 785
 786   add_move_binding (binding_set, GDK_f, GDK_MOD1_MASK,
 787                     GTK_MOVEMENT_WORDS, 1);
 788
 789   add_move_binding (binding_set, GDK_b, GDK_MOD1_MASK,
 790                     GTK_MOVEMENT_WORDS, -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   /* Setting the cut/paste/copy anchor */
 829   gtk_binding_entry_add_signal (binding_set, GDK_space, GDK_CONTROL_MASK,
 830                                 "set_anchor", 0);
 831   gtk_binding_entry_add_signal (binding_set, GDK_KP_Space, GDK_CONTROL_MASK,
 832                                 "set_anchor", 0);
 833
 834   /* Deleting text */
 835   gtk_binding_entry_add_signal (binding_set, GDK_Delete, 0,
 836                                 "delete_from_cursor", 2,
 837                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 838                                 GTK_TYPE_INT, 1);
 839
 840   gtk_binding_entry_add_signal (binding_set, GDK_KP_Delete, 0,
 841                                 "delete_from_cursor", 2,
 842                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 843                                 GTK_TYPE_INT, 1);
 844
 845   gtk_binding_entry_add_signal (binding_set, GDK_d, GDK_CONTROL_MASK,
 846                                 "delete_from_cursor", 2,
 847                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 848                                 GTK_TYPE_INT, 1);
 849
 850   gtk_binding_entry_add_signal (binding_set, GDK_BackSpace, 0,
 851                                 "delete_from_cursor", 2,
 852                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 853                                 GTK_TYPE_INT, -1);
 854
 855   gtk_binding_entry_add_signal (binding_set, GDK_Delete, GDK_CONTROL_MASK,
 856                                 "delete_from_cursor", 2,
 857                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 858                                 GTK_TYPE_INT, 1);
 859
 860   gtk_binding_entry_add_signal (binding_set, GDK_KP_Delete, GDK_CONTROL_MASK,
 861                                 "delete_from_cursor", 2,
 862                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 863                                 GTK_TYPE_INT, 1);
 864
 865   gtk_binding_entry_add_signal (binding_set, GDK_d, GDK_MOD1_MASK,
 866                                 "delete_from_cursor", 2,
 867                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 868                                 GTK_TYPE_INT, 1);
 869
 870   gtk_binding_entry_add_signal (binding_set, GDK_BackSpace, GDK_CONTROL_MASK,
 871                                 "delete_from_cursor", 2,
 872                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 873                                 GTK_TYPE_INT, -1);
 874
 875   gtk_binding_entry_add_signal (binding_set, GDK_k, GDK_CONTROL_MASK,
 876                                 "delete_from_cursor", 2,
 877                                 GTK_TYPE_ENUM, GTK_DELETE_PARAGRAPH_ENDS,
 878                                 GTK_TYPE_INT, 1);
 879
 880   gtk_binding_entry_add_signal (binding_set, GDK_u, GDK_CONTROL_MASK,
 881                                 "delete_from_cursor", 2,
 882                                 GTK_TYPE_ENUM, GTK_DELETE_PARAGRAPHS,
 883                                 GTK_TYPE_INT, 1);
 884
 885   gtk_binding_entry_add_signal (binding_set, GDK_space, GDK_MOD1_MASK,
 886                                 "delete_from_cursor", 2,
 887                                 GTK_TYPE_ENUM, GTK_DELETE_WHITESPACE,
 888                                 GTK_TYPE_INT, 1);
 889   gtk_binding_entry_add_signal (binding_set, GDK_KP_Space, GDK_MOD1_MASK,
 890                                 "delete_from_cursor", 2,
 891                                 GTK_TYPE_ENUM, GTK_DELETE_WHITESPACE,
 892                                 GTK_TYPE_INT, 1);
 893   gtk_binding_entry_add_signal (binding_set, GDK_space, GDK_MOD1_MASK,
 894                                 "insert_at_cursor", 1,
 895                                 GTK_TYPE_STRING, " ");
 896   gtk_binding_entry_add_signal (binding_set, GDK_KP_Space, GDK_MOD1_MASK,
 897                                 "insert_at_cursor", 1,
 898                                 GTK_TYPE_STRING, " ");
 899
 900   gtk_binding_entry_add_signal (binding_set, GDK_backslash, GDK_MOD1_MASK,
 901                                 "delete_from_cursor", 2,
 902                                 GTK_TYPE_ENUM, GTK_DELETE_WHITESPACE,
 903                                 GTK_TYPE_INT, 1);
 904
 905   /* Cut/copy/paste */
 906
 907   gtk_binding_entry_add_signal (binding_set, GDK_x, GDK_CONTROL_MASK,
 908                                 "cut_clipboard", 0);
 909
 910   gtk_binding_entry_add_signal (binding_set, GDK_w, GDK_CONTROL_MASK,
 911                                 "cut_clipboard", 0);
 912
 913   gtk_binding_entry_add_signal (binding_set, GDK_c, GDK_CONTROL_MASK,
 914                                 "copy_clipboard", 0);
 915
 916   gtk_binding_entry_add_signal (binding_set, GDK_v, GDK_CONTROL_MASK,
 917                                 "paste_clipboard", 0);
 918
 919   gtk_binding_entry_add_signal (binding_set, GDK_y, GDK_CONTROL_MASK,
 920                                 "paste_clipboard", 0);
 921
 922   /* Overwrite */
 923   gtk_binding_entry_add_signal (binding_set, GDK_Insert, 0,
 924                                 "toggle_overwrite", 0);
 925   gtk_binding_entry_add_signal (binding_set, GDK_KP_Insert, 0,
 926                                 "toggle_overwrite", 0);
 927 }
 928
 929 static void
 930 gtk_text_view_init (GtkTextView *text_view)
 931 {
 932   GtkWidget *widget;
 933
 934   widget = GTK_WIDGET (text_view);
 935
 936   GTK_WIDGET_SET_FLAGS (widget, GTK_CAN_FOCUS);
 937
 938   /* Set up default style */
 939   text_view->wrap_mode = GTK_WRAP_NONE;
 940   text_view->pixels_above_lines = 0;
 941   text_view->pixels_below_lines = 0;
 942   text_view->pixels_inside_wrap = 0;
 943   text_view->justify = GTK_JUSTIFY_LEFT;
 944   text_view->left_margin = 0;
 945   text_view->right_margin = 0;
 946   text_view->indent = 0;
 947   text_view->tabs = NULL;
 948   text_view->editable = TRUE;
 949
 950   gtk_drag_dest_set (widget,
 951                      0,
 952                      target_table, G_N_ELEMENTS (target_table),
 953                      GDK_ACTION_COPY | GDK_ACTION_MOVE);
 954
 955   text_view->virtual_cursor_x = -1;
 956   text_view->virtual_cursor_y = -1;
 957
 958   /* This object is completely private. No external entity can gain a reference
 959    * to it; so we create it here and destroy it in finalize ().
 960    */
 961   text_view->im_context = gtk_im_multicontext_new ();
 962
 963   g_signal_connect (G_OBJECT (text_view->im_context), "commit",
 964                     G_CALLBACK (gtk_text_view_commit_handler), text_view);
 965   g_signal_connect (G_OBJECT (text_view->im_context), "preedit_changed",
 966                     G_CALLBACK (gtk_text_view_preedit_changed_handler), text_view);
 967   g_signal_connect (G_OBJECT (text_view->im_context), "retrieve_surrounding",
 968                     G_CALLBACK (gtk_text_view_retrieve_surrounding_handler), text_view);
 969   g_signal_connect (G_OBJECT (text_view->im_context), "delete_surrounding",
 970                     G_CALLBACK (gtk_text_view_delete_surrounding_handler), text_view);
 971
 972   text_view->cursor_visible = TRUE;
 973
 974   text_view->text_window = text_window_new (GTK_TEXT_WINDOW_TEXT,
 975                                             widget, 200, 200);
 976
 977   text_view->drag_start_x = -1;
 978   text_view->drag_start_y = -1;
 979
 980   text_view->pending_place_cursor_button = 0;
 981 }
 982
 983 /**
 984  * gtk_text_view_new:
 985  *
 986  * Creates a new #GtkTextView. If you don't call gtk_text_view_set_buffer()
 987  * before using the text view, an empty default buffer will be created
 988  * for you. Get the buffer with gtk_text_view_get_buffer(). If you want
 989  * to specify your own buffer, consider gtk_text_view_new_with_buffer().
 990  *
 991  * Return value: a new #GtkTextView
 992  **/
 993 GtkWidget*
 994 gtk_text_view_new (void)
 995 {
 996   return GTK_WIDGET (gtk_type_new (gtk_text_view_get_type ()));
 997 }
 998
 999 /**
1000  * gtk_text_view_new_with_buffer:
1001  * @buffer: a #GtkTextBuffer
1002  *
1003  * Creates a new #GtkTextView widget displaying the buffer
1004  * @buffer. One buffer can be shared among many widgets.
1005  * @buffer may be NULL to create a default buffer, in which case
1006  * this function is equivalent to gtk_text_view_new(). The
1007  * text view adds its own reference count to the buffer; it does not
1008  * take over an existing reference.
1009  *
1010  * Return value: a new #GtkTextView.
1011  **/
1012 GtkWidget*
1013 gtk_text_view_new_with_buffer (GtkTextBuffer *buffer)
1014 {
1015   GtkTextView *text_view;
1016
1017   text_view = (GtkTextView*)gtk_text_view_new ();
1018
1019   gtk_text_view_set_buffer (text_view, buffer);
1020
1021   return GTK_WIDGET (text_view);
1022 }
1023
1024 /**
1025  * gtk_text_view_set_buffer:
1026  * @text_view: a #GtkTextView
1027  * @buffer: a #GtkTextBuffer
1028  *
1029  * Sets @buffer as the buffer being displayed by @text_view. The previous
1030  * buffer displayed by the text view is unreferenced, and a reference is
1031  * added to @buffer. If you owned a reference to @buffer before passing it
1032  * to this function, you must remove that reference yourself; #GtkTextView
1033  * will not "adopt" it.
1034  *
1035  **/
1036 void
1037 gtk_text_view_set_buffer (GtkTextView   *text_view,
1038                           GtkTextBuffer *buffer)
1039 {
1040   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1041   g_return_if_fail (buffer == NULL || GTK_IS_TEXT_BUFFER (buffer));
1042
1043   if (text_view->buffer == buffer)
1044     return;
1045
1046   if (text_view->buffer != NULL)
1047     {
1048       /* Destroy all anchored children */
1049       GSList *tmp_list;
1050       GSList *copy;
1051
1052       copy = g_slist_copy (text_view->children);
1053       tmp_list = copy;
1054       while (tmp_list != NULL)
1055         {
1056           GtkTextViewChild *vc = tmp_list->data;
1057
1058           if (vc->anchor)
1059             {
1060               gtk_widget_destroy (vc->widget);
1061               /* vc may now be invalid! */
1062             }
1063
1064           tmp_list = g_slist_next (tmp_list);
1065         }
1066
1067       g_slist_free (copy);
1068
1069       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->buffer),
1070                                             gtk_text_view_mark_set_handler, text_view);
1071       g_object_unref (G_OBJECT (text_view->buffer));
1072       text_view->dnd_mark = NULL;
1073
1074       if (GTK_WIDGET_REALIZED (text_view))
1075         gtk_text_buffer_remove_selection_clipboard (text_view->buffer,
1076                                                     gtk_clipboard_get (GDK_SELECTION_PRIMARY));
1077     }
1078
1079   text_view->buffer = buffer;
1080
1081   if (buffer != NULL)
1082     {
1083       GtkTextIter start;
1084
1085       g_object_ref (G_OBJECT (buffer));
1086
1087       if (text_view->layout)
1088         gtk_text_layout_set_buffer (text_view->layout, buffer);
1089
1090       gtk_text_buffer_get_iter_at_offset (text_view->buffer, &start, 0);
1091
1092       text_view->dnd_mark = gtk_text_buffer_create_mark (text_view->buffer,
1093                                                          "gtk_drag_target",
1094                                                          &start, FALSE);
1095
1096       text_view->first_para_mark = gtk_text_buffer_create_mark (text_view->buffer,
1097                                                                 NULL,
1098                                                                 &start, TRUE);
1099
1100       text_view->first_para_pixels = 0;
1101
1102       g_signal_connect (G_OBJECT (text_view->buffer), "mark_set",
1103                         G_CALLBACK (gtk_text_view_mark_set_handler), text_view);
1104
1105       if (GTK_WIDGET_REALIZED (text_view))
1106         gtk_text_buffer_add_selection_clipboard (text_view->buffer,
1107                                                  gtk_clipboard_get (GDK_SELECTION_PRIMARY));
1108     }
1109
1110   if (GTK_WIDGET_VISIBLE (text_view))
1111     gtk_widget_queue_draw (GTK_WIDGET (text_view));
1112
1113   gtk_text_view_invalidate (text_view);
1114 }
1115
1116 static GtkTextBuffer*
1117 get_buffer (GtkTextView *text_view)
1118 {
1119   if (text_view->buffer == NULL)
1120     {
1121       GtkTextBuffer *b;
1122       b = gtk_text_buffer_new (NULL);
1123       gtk_text_view_set_buffer (text_view, b);
1124       g_object_unref (G_OBJECT (b));
1125     }
1126
1127   return text_view->buffer;
1128 }
1129
1130 /**
1131  * gtk_text_view_get_buffer:
1132  * @text_view: a #GtkTextView
1133  *
1134  * Returns the #GtkTextBuffer being displayed by this text view.
1135  * The reference count on the buffer is not incremented; the caller
1136  * of this function won't own a new reference.
1137  *
1138  * Return value: a #GtkTextBuffer
1139  **/
1140 GtkTextBuffer*
1141 gtk_text_view_get_buffer (GtkTextView *text_view)
1142 {
1143   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
1144
1145   return get_buffer (text_view);
1146 }
1147
1148 /**
1149  * gtk_text_view_get_iter_at_location:
1150  * @text_view: a #GtkTextView
1151  * @iter: a #GtkTextIter
1152  * @x: x position, in buffer coordinates
1153  * @y: y position, in buffer coordinates
1154  *
1155  * Retrieves the iterator at buffer coordinates @x and @y. Buffer
1156  * coordinates are coordinates for the entire buffer, not just the
1157  * currently-displayed portion.  If you have coordinates from an
1158  * event, you have to convert those to buffer coordinates with
1159  * gtk_text_view_window_to_buffer_coords().
1160  *
1161  **/
1162 void
1163 gtk_text_view_get_iter_at_location (GtkTextView *text_view,
1164                                     GtkTextIter *iter,
1165                                     gint         x,
1166                                     gint         y)
1167 {
1168   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1169   g_return_if_fail (iter != NULL);
1170   g_return_if_fail (text_view->layout != NULL);
1171
1172   gtk_text_layout_get_iter_at_pixel (text_view->layout,
1173                                      iter,
1174                                      x,
1175                                      y);
1176 }
1177
1178 /**
1179  * gtk_text_view_get_iter_location:
1180  * @text_view: a #GtkTextView
1181  * @iter: a #GtkTextIter
1182  * @location: bounds of the character at @iter
1183  *
1184  * Gets a rectangle which roughly contains the character at @iter.
1185  * The rectangle position is in buffer coordinates; use
1186  * gtk_text_view_buffer_to_window_coords() to convert these
1187  * coordinates to coordinates for one of the windows in the text view.
1188  *
1189  **/
1190 void
1191 gtk_text_view_get_iter_location (GtkTextView       *text_view,
1192                                  const GtkTextIter *iter,
1193                                  GdkRectangle      *location)
1194 {
1195   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1196   g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
1197
1198   gtk_text_layout_get_iter_location (text_view->layout, iter, location);
1199 }
1200
1201 /**
1202  * gtk_text_view_get_line_yrange:
1203  * @text_view: a #GtkTextView
1204  * @iter: a #GtkTextIter
1205  * @y: return location for a y coordinate
1206  * @height: return location for a height
1207  *
1208  * Gets the y coordinate of the top of the line containing @iter,
1209  * and the height of the line. The coordinate is a buffer coordinate;
1210  * convert to window coordinates with gtk_text_view_buffer_to_window_coords().
1211  *
1212  **/
1213 void
1214 gtk_text_view_get_line_yrange (GtkTextView       *text_view,
1215                                const GtkTextIter *iter,
1216                                gint              *y,
1217                                gint              *height)
1218 {
1219   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1220   g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
1221
1222   gtk_text_layout_get_line_yrange (text_view->layout,
1223                                    iter,
1224                                    y,
1225                                    height);
1226 }
1227
1228 /**
1229  * gtk_text_view_get_line_at_y:
1230  * @text_view: a #GtkTextView
1231  * @target_iter: a #GtkTextIter
1232  * @y: a y coordinate
1233  * @line_top: return location for top coordinate of the line
1234  *
1235  * Gets the #GtkTextIter at the start of the line containing
1236  * the coordinate @y. @y is in buffer coordinates, convert from
1237  * window coordinates with gtk_text_view_window_to_buffer_coords().
1238  * If non-%NULL, @line_top will be filled with the coordinate of the top
1239  * edge of the line.
1240  **/
1241 void
1242 gtk_text_view_get_line_at_y (GtkTextView *text_view,
1243                              GtkTextIter *target_iter,
1244                              gint         y,
1245                              gint        *line_top)
1246 {
1247   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1248
1249   gtk_text_layout_get_line_at_y (text_view->layout,
1250                                  target_iter,
1251                                  y,
1252                                  line_top);
1253 }
1254
1255 static gboolean
1256 set_adjustment_clamped (GtkAdjustment *adj, gdouble val)
1257 {
1258   DV (g_print ("  Setting adj to raw value %g\n", val));
1259
1260   /* We don't really want to clamp to upper; we want to clamp to
1261      upper - page_size which is the highest value the scrollbar
1262      will let us reach. */
1263   if (val > (adj->upper - adj->page_size))
1264     val = adj->upper - adj->page_size;
1265
1266   if (val < adj->lower)
1267     val = adj->lower;
1268
1269   if (val != adj->value)
1270     {
1271       DV (g_print ("  Setting adj to clamped value %g\n", val));
1272       gtk_adjustment_set_value (adj, val);
1273       return TRUE;
1274     }
1275   else
1276     return FALSE;
1277 }
1278
1279 /**
1280  * gtk_text_view_scroll_to_iter:
1281  * @text_view: a #GtkTextView
1282  * @iter: a #GtkTextIter
1283  * @within_margin: margin as a [0.0,0.5) fraction of screen size
1284  * @use_align: whether to use alignment arguments (if %FALSE, just get the mark onscreen)
1285  * @xalign: horizontal alignment of mark within visible area.
1286  * @yalign: vertical alignment of mark within visible area
1287  *
1288  * Scrolls @text_view so that @iter is on the screen in the position
1289  * indicated by @xalign and @yalign. An alignment of 0.0 indicates
1290  * left or top, 1.0 indicates right or bottom, 0.5 means center. If @use_align
1291  * is %FALSE, the text scrolls the minimal distance to get the mark onscreen,
1292  * possibly not scrolling at all. The effective screen for purposes
1293  * of this function is reduced by a margin of size @within_margin.
1294  * NOTE: This function uses the currently-computed height of the
1295  * lines in the text buffer. Note that line heights are computed
1296  * in an idle handler; so this function may not have the desired effect
1297  * if it's called before the height computations. To avoid oddness,
1298  * consider using gtk_text_view_scroll_to_mark() which saves a point
1299  * to be scrolled to after line validation.
1300  *
1301  * Return value: %TRUE if scrolling occurred
1302  **/
1303 gboolean
1304 gtk_text_view_scroll_to_iter (GtkTextView   *text_view,
1305                               GtkTextIter   *iter,
1306                               gdouble        within_margin,
1307                               gboolean       use_align,
1308                               gdouble        xalign,
1309                               gdouble        yalign)
1310 {
1311   GdkRectangle rect;
1312   GdkRectangle screen;
1313   gint screen_bottom;
1314   gint screen_right;
1315   gint scroll_dest;
1316   GtkWidget *widget;
1317   gboolean retval = FALSE;
1318   gint scroll_inc;
1319   gint screen_xoffset, screen_yoffset;
1320   gint current_x_scroll, current_y_scroll;
1321
1322   /* FIXME why don't we do the validate-at-scroll-destination thing
1323    * from flush_scroll in this function? I think it wasn't done before
1324    * because changed_handler was screwed up, but I could be wrong.
1325    */
1326
1327   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1328   g_return_val_if_fail (iter != NULL, FALSE);
1329   g_return_val_if_fail (within_margin >= 0.0 && within_margin < 0.5, FALSE);
1330   g_return_val_if_fail (xalign >= 0.0 && xalign <= 1.0, FALSE);
1331   g_return_val_if_fail (yalign >= 0.0 && yalign <= 1.0, FALSE);
1332
1333   widget = GTK_WIDGET (text_view);
1334
1335   DV(g_print(G_STRLOC"\n"));
1336
1337   gtk_text_layout_get_iter_location (text_view->layout,
1338                                      iter,
1339                                      &rect);
1340
1341   DV (g_print (" target rect %d,%d  %d x %d\n", rect.x, rect.y, rect.width, rect.height));
1342
1343   current_x_scroll = text_view->xoffset;
1344   current_y_scroll = text_view->yoffset;
1345
1346   screen.x = current_x_scroll;
1347   screen.y = current_y_scroll;
1348   screen.width = SCREEN_WIDTH (widget);
1349   screen.height = SCREEN_HEIGHT (widget);
1350
1351   screen_xoffset = screen.width * within_margin;
1352   screen_yoffset = screen.height * within_margin;
1353
1354   screen.x += screen_xoffset;
1355   screen.y += screen_yoffset;
1356   screen.width -= screen_xoffset * 2;
1357   screen.height -= screen_yoffset * 2;
1358
1359   /* paranoia check */
1360   if (screen.width < 1)
1361     screen.width = 1;
1362   if (screen.height < 1)
1363     screen.height = 1;
1364
1365   screen_right = screen.x + screen.width;
1366   screen_bottom = screen.y + screen.height;
1367
1368   /* The alignment affects the point in the target character that we
1369    * choose to align. If we're doing right/bottom alignment, we align
1370    * the right/bottom edge of the character the mark is at; if we're
1371    * doing left/top we align the left/top edge of the character; if
1372    * we're doing center alignment we align the center of the
1373    * character.
1374    */
1375
1376   /* Vertical scroll */
1377
1378   scroll_inc = 0;
1379   scroll_dest = current_y_scroll;
1380
1381   if (use_align)
1382     {
1383       scroll_dest = rect.y + (rect.height * yalign) - (screen.height * yalign);
1384
1385       /* if scroll_dest < screen.y, we move a negative increment (up),
1386        * else a positive increment (down)
1387        */
1388       scroll_inc = scroll_dest - screen.y + screen_yoffset;
1389     }
1390   else
1391     {
1392       /* move minimum to get onscreen */
1393       if (rect.y < screen.y)
1394         {
1395           scroll_dest = rect.y;
1396           scroll_inc = scroll_dest - screen.y - screen_yoffset;
1397         }
1398       else if ((rect.y + rect.height) > screen_bottom)
1399         {
1400           scroll_dest = rect.y + rect.height;
1401           scroll_inc = scroll_dest - screen_bottom + screen_yoffset;
1402         }
1403     }
1404
1405   if (scroll_inc != 0)
1406     {
1407       retval = set_adjustment_clamped (get_vadjustment (text_view),
1408                                        current_y_scroll + scroll_inc);
1409
1410       DV (g_print (" vert increment %d\n", scroll_inc));
1411     }
1412
1413   /* Horizontal scroll */
1414
1415   scroll_inc = 0;
1416   scroll_dest = current_x_scroll;
1417
1418   if (use_align)
1419     {
1420       scroll_dest = rect.x + (rect.width * xalign) - (screen.width * xalign);
1421
1422       /* if scroll_dest < screen.y, we move a negative increment (left),
1423        * else a positive increment (right)
1424        */
1425       scroll_inc = scroll_dest - screen.x + screen_xoffset;
1426     }
1427   else
1428     {
1429       /* move minimum to get onscreen */
1430       if (rect.x < screen.x)
1431         {
1432           scroll_dest = rect.x;
1433           scroll_inc = scroll_dest - screen.x - screen_xoffset;
1434         }
1435       else if ((rect.x + rect.width) > screen_right)
1436         {
1437           scroll_dest = rect.x + rect.width;
1438           scroll_inc = scroll_dest - screen_right + screen_xoffset;
1439         }
1440     }
1441
1442   if (scroll_inc != 0)
1443     {
1444       retval = set_adjustment_clamped (get_hadjustment (text_view),
1445                                        current_x_scroll + scroll_inc);
1446
1447       DV (g_print (" horiz increment %d\n", scroll_inc));
1448     }
1449
1450   if (retval)
1451     DV(g_print (">Actually scrolled ("G_STRLOC")\n"));
1452   else
1453     DV(g_print (">Didn't end up scrolling ("G_STRLOC")\n"));
1454
1455   return retval;
1456 }
1457
1458 static void
1459 free_pending_scroll (GtkTextPendingScroll *scroll)
1460 {
1461   if (!gtk_text_mark_get_deleted (scroll->mark))
1462     gtk_text_buffer_delete_mark (gtk_text_mark_get_buffer (scroll->mark),
1463                                  scroll->mark);
1464   g_object_unref (G_OBJECT (scroll->mark));
1465   g_free (scroll);
1466 }
1467
1468 static void
1469 gtk_text_view_queue_scroll (GtkTextView   *text_view,
1470                             GtkTextMark   *mark,
1471                             gdouble        within_margin,
1472                             gboolean       use_align,
1473                             gdouble        xalign,
1474                             gdouble        yalign)
1475 {
1476   GtkTextIter iter;
1477   GtkTextPendingScroll *scroll;
1478
1479   DV(g_print(G_STRLOC"\n"));
1480
1481   scroll = g_new (GtkTextPendingScroll, 1);
1482
1483   scroll->within_margin = within_margin;
1484   scroll->use_align = use_align;
1485   scroll->xalign = xalign;
1486   scroll->yalign = yalign;
1487
1488   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
1489
1490   scroll->mark = gtk_text_buffer_create_mark (get_buffer (text_view),
1491                                               NULL,
1492                                               &iter,
1493                                               gtk_text_mark_get_left_gravity (mark));
1494
1495   g_object_ref (G_OBJECT (scroll->mark));
1496
1497   if (text_view->pending_scroll)
1498     free_pending_scroll (text_view->pending_scroll);
1499
1500   text_view->pending_scroll = scroll;
1501 }
1502
1503 static gboolean
1504 gtk_text_view_flush_scroll (GtkTextView *text_view)
1505 {
1506   GtkTextIter iter;
1507   GtkTextPendingScroll *scroll;
1508   gboolean retval;
1509
1510   DV(g_print(G_STRLOC"\n"));
1511
1512   if (text_view->pending_scroll == NULL)
1513     return FALSE;
1514
1515   scroll = text_view->pending_scroll;
1516
1517   /* avoid recursion */
1518   text_view->pending_scroll = NULL;
1519
1520   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, scroll->mark);
1521
1522   /* Validate arbitrary area around the scroll destination, so the adjustment
1523    * can meaningfully point into that area
1524    */
1525   DV(g_print (">Validating scroll destination ("G_STRLOC")\n"));
1526   gtk_text_layout_validate_yrange (text_view->layout, &iter, -300, 300);
1527
1528   DV(g_print (">Done validating scroll destination ("G_STRLOC")\n"));
1529
1530   /* Ensure we have updated width/height */
1531   gtk_text_view_update_adjustments (text_view);
1532
1533   retval = gtk_text_view_scroll_to_iter (text_view,
1534                                          &iter,
1535                                          scroll->within_margin,
1536                                          scroll->use_align,
1537                                          scroll->xalign,
1538                                          scroll->yalign);
1539
1540   free_pending_scroll (scroll);
1541
1542   return retval;
1543 }
1544
1545 static void
1546 gtk_text_view_set_adjustment_upper (GtkAdjustment *adj, gdouble upper)
1547 {
1548   if (upper != adj->upper)
1549     {
1550       gdouble min = MAX (0.0, upper - adj->page_size);
1551       gboolean value_changed = FALSE;
1552
1553       adj->upper = upper;
1554
1555       if (adj->value > min)
1556         {
1557           adj->value = min;
1558           value_changed = TRUE;
1559         }
1560
1561       gtk_signal_emit_by_name (GTK_OBJECT (adj), "changed");
1562       DV(g_print(">Changed adj upper to %g ("G_STRLOC")\n", upper));
1563
1564       if (value_changed)
1565         {
1566           DV(g_print(">Changed adj value because upper decreased ("G_STRLOC")\n"));
1567           gtk_signal_emit_by_name (GTK_OBJECT (adj), "value_changed");
1568         }
1569     }
1570 }
1571
1572 static void
1573 gtk_text_view_update_adjustments (GtkTextView *text_view)
1574 {
1575   gint width = 0, height = 0;
1576
1577   DV(g_print(">Updating adjustments ("G_STRLOC")\n"));
1578
1579   if (text_view->layout)
1580     gtk_text_layout_get_size (text_view->layout, &width, &height);
1581
1582   if (text_view->width != width || text_view->height != height)
1583     {
1584       text_view->width = width;
1585       text_view->height = height;
1586
1587       gtk_text_view_set_adjustment_upper (get_hadjustment (text_view),
1588                                           MAX (SCREEN_WIDTH (text_view), width));
1589       gtk_text_view_set_adjustment_upper (get_vadjustment (text_view),
1590                                           MAX (SCREEN_HEIGHT (text_view), height));
1591
1592       /* hadj/vadj exist since we called get_hadjustment/get_vadjustment above */
1593
1594       /* Set up the step sizes; we'll say that a page is
1595          our allocation minus one step, and a step is
1596          1/10 of our allocation. */
1597       text_view->hadjustment->step_increment =
1598         SCREEN_WIDTH (text_view) / 10.0;
1599       text_view->hadjustment->page_increment =
1600         SCREEN_WIDTH (text_view) * 0.9;
1601
1602       text_view->vadjustment->step_increment =
1603         SCREEN_HEIGHT (text_view) / 10.0;
1604       text_view->vadjustment->page_increment =
1605         SCREEN_HEIGHT (text_view) * 0.9;
1606
1607       gtk_signal_emit_by_name (GTK_OBJECT (get_hadjustment (text_view)), "changed");
1608       gtk_signal_emit_by_name (GTK_OBJECT (get_hadjustment (text_view)), "changed");
1609     }
1610 }
1611
1612 static void
1613 gtk_text_view_update_layout_width (GtkTextView *text_view)
1614 {
1615   DV(g_print(">Updating layout width ("G_STRLOC")\n"));
1616
1617   gtk_text_view_ensure_layout (text_view);
1618
1619   gtk_text_layout_set_screen_width (text_view->layout,
1620                                     SCREEN_WIDTH (text_view));
1621 }
1622
1623 static void
1624 gtk_text_view_update_im_spot_location (GtkTextView *text_view)
1625 {
1626   GdkRectangle area;
1627   gint cursor_x_pos, cursor_y_pos;
1628
1629   if (text_view->layout == NULL)
1630     return;
1631
1632   gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, &cursor_y_pos);
1633
1634   area.x = cursor_x_pos;
1635   area.y = cursor_y_pos;
1636   area.width = area.height = 0;
1637
1638   gtk_im_context_set_cursor_location (text_view->im_context, &area);
1639 }
1640
1641 /**
1642  * gtk_text_view_scroll_to_mark:
1643  * @text_view: a #GtkTextView
1644  * @mark: a #GtkTextMark
1645  * @within_margin: margin as a [0.0,0.5) fraction of screen size
1646  * @use_align: whether to use alignment arguments (if %FALSE, just get the mark onscreen)
1647  * @xalign: horizontal alignment of mark within visible area.
1648  * @yalign: vertical alignment of mark within visible area
1649  *
1650  * Scrolls @text_view so that @mark is on the screen in the position
1651  * indicated by @xalign and @yalign. An alignment of 0.0 indicates
1652  * left or top, 1.0 indicates right or bottom, 0.5 means center. If @use_align
1653  * is %FALSE, the text scrolls the minimal distance to get the mark onscreen,
1654  * possibly not scrolling at all. The effective screen for purposes
1655  * of this function is reduced by a margin of size @within_margin.
1656  *
1657  **/
1658 void
1659 gtk_text_view_scroll_to_mark (GtkTextView *text_view,
1660                               GtkTextMark *mark,
1661                               gdouble      within_margin,
1662                               gboolean     use_align,
1663                               gdouble      xalign,
1664                               gdouble      yalign)
1665 {
1666   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1667   g_return_if_fail (GTK_IS_TEXT_MARK (mark));
1668   g_return_if_fail (within_margin >= 0.0 && within_margin < 0.5);
1669   g_return_if_fail (xalign >= 0.0 && xalign <= 1.0);
1670   g_return_if_fail (yalign >= 0.0 && yalign <= 1.0);
1671
1672   gtk_text_view_queue_scroll (text_view, mark,
1673                               within_margin,
1674                               use_align,
1675                               xalign,
1676                               yalign);
1677
1678   /* If no validation is pending, we need to go ahead and force an
1679    * immediate scroll.
1680    */
1681   if (text_view->layout &&
1682       gtk_text_layout_is_valid (text_view->layout))
1683     gtk_text_view_flush_scroll (text_view);
1684 }
1685
1686 void
1687 gtk_text_view_scroll_mark_onscreen (GtkTextView *text_view,
1688                                     GtkTextMark *mark)
1689 {
1690   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1691   g_return_if_fail (GTK_IS_TEXT_MARK (mark));
1692
1693   gtk_text_view_scroll_to_mark (text_view, mark, 0.0, FALSE, 0.0, 0.0);
1694 }
1695
1696 static gboolean
1697 clamp_iter_onscreen (GtkTextView *text_view, GtkTextIter *iter)
1698 {
1699   GdkRectangle visible_rect;
1700   gtk_text_view_get_visible_rect (text_view, &visible_rect);
1701
1702   return gtk_text_layout_clamp_iter_to_vrange (text_view->layout, iter,
1703                                                visible_rect.y,
1704                                                visible_rect.y + visible_rect.height);
1705 }
1706
1707 /**
1708  * gtk_text_view_move_mark_onscreen:
1709  * @text_view: a #GtkTextView
1710  * @mark: a #GtkTextMark
1711  *
1712  * Moves a mark within the buffer so that it's
1713  * located within the currently-visible text area.
1714  *
1715  * Return value: %TRUE if the mark moved (wasn't already onscreen)
1716  **/
1717 gboolean
1718 gtk_text_view_move_mark_onscreen (GtkTextView *text_view,
1719                                   GtkTextMark *mark)
1720 {
1721   GtkTextIter iter;
1722
1723   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1724   g_return_val_if_fail (mark != NULL, FALSE);
1725
1726   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
1727
1728   if (clamp_iter_onscreen (text_view, &iter))
1729     {
1730       gtk_text_buffer_move_mark (get_buffer (text_view), mark, &iter);
1731       return TRUE;
1732     }
1733   else
1734     return FALSE;
1735 }
1736
1737 /**
1738  * gtk_text_view_get_visible_rect:
1739  * @text_view: a #GtkTextView
1740  * @visible_rect: rectangle to fill
1741  *
1742  * Fills @visible_rect with the currently-visible
1743  * region of the buffer, in buffer coordinates. Convert to window coordinates
1744  * with gtk_text_view_buffer_to_window_coords().
1745  **/
1746 void
1747 gtk_text_view_get_visible_rect (GtkTextView  *text_view,
1748                                 GdkRectangle *visible_rect)
1749 {
1750   GtkWidget *widget;
1751
1752   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1753
1754   widget = GTK_WIDGET (text_view);
1755
1756   if (visible_rect)
1757     {
1758       visible_rect->x = text_view->xoffset;
1759       visible_rect->y = text_view->yoffset;
1760       visible_rect->width = SCREEN_WIDTH (widget);
1761       visible_rect->height = SCREEN_HEIGHT (widget);
1762
1763       DV(g_print(" visible rect: %d,%d %d x %d\n",
1764                  visible_rect->x,
1765                  visible_rect->y,
1766                  visible_rect->width,
1767                  visible_rect->height));
1768     }
1769 }
1770
1771 /**
1772  * gtk_text_view_set_wrap_mode:
1773  * @text_view: a #GtkTextView
1774  * @wrap_mode: a #GtkWrapMode
1775  *
1776  * Sets the line wrapping for the view.
1777  **/
1778 void
1779 gtk_text_view_set_wrap_mode (GtkTextView *text_view,
1780                              GtkWrapMode  wrap_mode)
1781 {
1782   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1783
1784   if (text_view->wrap_mode != wrap_mode)
1785     {
1786       text_view->wrap_mode = wrap_mode;
1787
1788       if (text_view->layout)
1789         {
1790           text_view->layout->default_style->wrap_mode = wrap_mode;
1791           gtk_text_layout_default_style_changed (text_view->layout);
1792         }
1793     }
1794
1795   g_object_notify (G_OBJECT (text_view), "wrap_mode");
1796 }
1797
1798 /**
1799  * gtk_text_view_get_wrap_mode:
1800  * @text_view: a #GtkTextView
1801  *
1802  * Gets the line wrapping for the view.
1803  *
1804  * Return value: the line wrap setting
1805  **/
1806 GtkWrapMode
1807 gtk_text_view_get_wrap_mode (GtkTextView *text_view)
1808 {
1809   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_WRAP_NONE);
1810
1811   return text_view->wrap_mode;
1812 }
1813
1814 /**
1815  * gtk_text_view_set_editable:
1816  * @text_view: a #GtkTextView
1817  * @setting: whether it's editable
1818  *
1819  * Sets the default editability of the #GtkTextView. You can override
1820  * this default setting with tags in the buffer, using the "editable"
1821  * attribute of tags.
1822  **/
1823 void
1824 gtk_text_view_set_editable (GtkTextView *text_view,
1825                             gboolean     setting)
1826 {
1827   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1828
1829   if (text_view->editable != setting)
1830     {
1831       text_view->editable = setting;
1832
1833       if (text_view->layout)
1834         {
1835           text_view->layout->default_style->editable = text_view->editable;
1836           gtk_text_layout_default_style_changed (text_view->layout);
1837         }
1838     }
1839
1840   g_object_notify (G_OBJECT (text_view), "editable");
1841 }
1842
1843 /**
1844  * gtk_text_view_get_editable:
1845  * @text_view: a #GtkTextView
1846  *
1847  * Returns the default editability of the #GtkTextView. Tags in the
1848  * buffer may override this setting for some ranges of text.
1849  *
1850  * Return value: whether text is editable by default
1851  **/
1852 gboolean
1853 gtk_text_view_get_editable (GtkTextView *text_view)
1854 {
1855   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1856
1857   return text_view->editable;
1858 }
1859
1860 void
1861 gtk_text_view_set_pixels_above_lines (GtkTextView *text_view,
1862                                       gint         pixels_above_lines)
1863 {
1864   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1865
1866   if (text_view->pixels_above_lines != pixels_above_lines)
1867     {
1868       text_view->pixels_above_lines = pixels_above_lines;
1869
1870       if (text_view->layout)
1871         {
1872           text_view->layout->default_style->pixels_above_lines = pixels_above_lines;
1873           gtk_text_layout_default_style_changed (text_view->layout);
1874         }
1875     }
1876
1877   g_object_notify (G_OBJECT (text_view), "pixels_above_lines");
1878 }
1879
1880 gint
1881 gtk_text_view_get_pixels_above_lines (GtkTextView *text_view)
1882 {
1883   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1884
1885   return text_view->pixels_above_lines;
1886 }
1887
1888 void
1889 gtk_text_view_set_pixels_below_lines (GtkTextView *text_view,
1890                                       gint         pixels_below_lines)
1891 {
1892   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1893
1894   if (text_view->pixels_below_lines != pixels_below_lines)
1895     {
1896       text_view->pixels_below_lines = pixels_below_lines;
1897
1898       if (text_view->layout)
1899         {
1900           text_view->layout->default_style->pixels_below_lines = pixels_below_lines;
1901           gtk_text_layout_default_style_changed (text_view->layout);
1902         }
1903     }
1904
1905   g_object_notify (G_OBJECT (text_view), "pixels_below_lines");
1906 }
1907
1908 gint
1909 gtk_text_view_get_pixels_below_lines (GtkTextView *text_view)
1910 {
1911   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1912
1913   return text_view->pixels_below_lines;
1914 }
1915
1916 void
1917 gtk_text_view_set_pixels_inside_wrap (GtkTextView *text_view,
1918                                       gint         pixels_inside_wrap)
1919 {
1920   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1921
1922   if (text_view->pixels_inside_wrap != pixels_inside_wrap)
1923     {
1924       text_view->pixels_inside_wrap = pixels_inside_wrap;
1925
1926       if (text_view->layout)
1927         {
1928           text_view->layout->default_style->pixels_inside_wrap = pixels_inside_wrap;
1929           gtk_text_layout_default_style_changed (text_view->layout);
1930         }
1931     }
1932   g_object_notify (G_OBJECT (text_view), "pixels_inside_wrap");
1933 }
1934
1935 gint
1936 gtk_text_view_get_pixels_inside_wrap (GtkTextView *text_view)
1937 {
1938   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1939
1940   return text_view->pixels_inside_wrap;
1941 }
1942
1943 void
1944 gtk_text_view_set_justification (GtkTextView     *text_view,
1945                                  GtkJustification justify)
1946 {
1947   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1948
1949   if (text_view->justify != justify)
1950     {
1951       text_view->justify = justify;
1952
1953       if (text_view->layout)
1954         {
1955           text_view->layout->default_style->justification = justify;
1956           gtk_text_layout_default_style_changed (text_view->layout);
1957         }
1958     }
1959
1960   g_object_notify (G_OBJECT (text_view), "justification");
1961 }
1962
1963 GtkJustification
1964 gtk_text_view_get_justification (GtkTextView *text_view)
1965 {
1966   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_JUSTIFY_LEFT);
1967
1968   return text_view->justify;
1969 }
1970
1971 void
1972 gtk_text_view_set_left_margin (GtkTextView *text_view,
1973                                gint         left_margin)
1974 {
1975   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1976
1977   if (text_view->left_margin != left_margin)
1978     {
1979       text_view->left_margin = left_margin;
1980
1981       if (text_view->layout)
1982         {
1983           text_view->layout->default_style->left_margin = left_margin;
1984           gtk_text_layout_default_style_changed (text_view->layout);
1985         }
1986     }
1987
1988   g_object_notify (G_OBJECT (text_view), "left_margin");
1989 }
1990
1991 gint
1992 gtk_text_view_get_left_margin (GtkTextView *text_view)
1993 {
1994   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1995
1996   return text_view->left_margin;
1997 }
1998
1999 void
2000 gtk_text_view_set_right_margin (GtkTextView *text_view,
2001                                 gint         right_margin)
2002 {
2003   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2004
2005   if (text_view->right_margin != right_margin)
2006     {
2007       text_view->right_margin = right_margin;
2008
2009       if (text_view->layout)
2010         {
2011           text_view->layout->default_style->right_margin = right_margin;
2012           gtk_text_layout_default_style_changed (text_view->layout);
2013         }
2014     }
2015
2016   g_object_notify (G_OBJECT (text_view), "right_margin");
2017 }
2018
2019 gint
2020 gtk_text_view_get_right_margin (GtkTextView *text_view)
2021 {
2022   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2023
2024   return text_view->right_margin;
2025 }
2026
2027 void
2028 gtk_text_view_set_indent (GtkTextView *text_view,
2029                           gint         indent)
2030 {
2031   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2032
2033   if (text_view->indent != indent)
2034     {
2035       text_view->indent = indent;
2036
2037       if (text_view->layout)
2038         {
2039           text_view->layout->default_style->indent = indent;
2040           gtk_text_layout_default_style_changed (text_view->layout);
2041         }
2042     }
2043   g_object_notify (G_OBJECT (text_view), "indent");
2044 }
2045
2046 gint
2047 gtk_text_view_get_indent (GtkTextView *text_view)
2048 {
2049   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2050
2051   return text_view->indent;
2052 }
2053
2054 void
2055 gtk_text_view_set_tabs (GtkTextView   *text_view,
2056                         PangoTabArray *tabs)
2057 {
2058   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2059
2060   if (text_view->tabs)
2061     pango_tab_array_free (text_view->tabs);
2062
2063   text_view->tabs = tabs ? pango_tab_array_copy (tabs) : NULL;
2064
2065   if (text_view->layout)
2066     {
2067       /* some unkosher futzing in internal struct details... */
2068       if (text_view->layout->default_style->tabs)
2069         pango_tab_array_free (text_view->layout->default_style->tabs);
2070
2071       text_view->layout->default_style->tabs =
2072         text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
2073
2074       gtk_text_layout_default_style_changed (text_view->layout);
2075     }
2076
2077   g_object_notify (G_OBJECT (text_view), "tabs");
2078 }
2079
2080 PangoTabArray*
2081 gtk_text_view_get_tabs (GtkTextView *text_view)
2082 {
2083   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
2084
2085   return text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
2086 }
2087
2088 /**
2089  * gtk_text_view_set_cursor_visible:
2090  * @text_view: a #GtkTextView
2091  * @setting: whether to show the insertion cursor
2092  *
2093  * Toggles whether the insertion point is displayed. A buffer with no editable
2094  * text probably shouldn't have a visible cursor, so you may want to turn
2095  * the cursor off.
2096  **/
2097 void
2098 gtk_text_view_set_cursor_visible    (GtkTextView   *text_view,
2099                                      gboolean       setting)
2100 {
2101   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2102
2103   setting = (setting != FALSE);
2104
2105   if (text_view->cursor_visible != setting)
2106     {
2107       text_view->cursor_visible = setting;
2108
2109       if (GTK_WIDGET_HAS_FOCUS (text_view))
2110         {
2111           if (text_view->layout)
2112             {
2113               gtk_text_layout_set_cursor_visible (text_view->layout, setting);
2114               gtk_text_view_check_cursor_blink (text_view);
2115             }
2116         }
2117     }
2118
2119   g_object_notify (G_OBJECT (text_view), "cursor_visible");
2120 }
2121
2122 /**
2123  * gtk_text_view_get_cursor_visible:
2124  * @text_view: a #GtkTextView
2125  *
2126  * Find out whether the cursor is being displayed.
2127  *
2128  * Return value: whether the insertion mark is visible
2129  **/
2130 gboolean
2131 gtk_text_view_get_cursor_visible    (GtkTextView   *text_view)
2132 {
2133   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
2134
2135   return text_view->cursor_visible;
2136 }
2137
2138
2139 /**
2140  * gtk_text_view_place_cursor_onscreen:
2141  * @text_view: a #GtkTextView
2142  *
2143  * Moves the cursor to the currently visible region of the
2144  * buffer, it it isn't there already.
2145  *
2146  * Return value: TRUE if the cursor had to be moved.
2147  **/
2148 gboolean
2149 gtk_text_view_place_cursor_onscreen (GtkTextView *text_view)
2150 {
2151   GtkTextIter insert;
2152
2153   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
2154
2155   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
2156                                     gtk_text_buffer_get_mark (get_buffer (text_view),
2157                                                               "insert"));
2158
2159   if (clamp_iter_onscreen (text_view, &insert))
2160     {
2161       gtk_text_buffer_place_cursor (get_buffer (text_view), &insert);
2162       return TRUE;
2163     }
2164   else
2165     return FALSE;
2166 }
2167
2168 static void
2169 gtk_text_view_remove_validate_idles (GtkTextView *text_view)
2170 {
2171   if (text_view->first_validate_idle != 0)
2172     {
2173       g_source_remove (text_view->first_validate_idle);
2174       text_view->first_validate_idle = 0;
2175     }
2176
2177   if (text_view->incremental_validate_idle != 0)
2178     {
2179       g_source_remove (text_view->incremental_validate_idle);
2180       text_view->incremental_validate_idle = 0;
2181     }
2182 }
2183
2184 static void
2185 gtk_text_view_destroy (GtkObject *object)
2186 {
2187   GtkTextView *text_view;
2188   GtkTextLayout *layout;
2189
2190   text_view = GTK_TEXT_VIEW (object);
2191
2192   layout = text_view->layout;
2193
2194   gtk_text_view_remove_validate_idles (text_view);
2195   gtk_text_view_set_buffer (text_view, NULL);
2196   gtk_text_view_destroy_layout (text_view);
2197
2198   (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
2199 }
2200
2201 static void
2202 gtk_text_view_finalize (GObject *object)
2203 {
2204   GtkTextView *text_view;
2205
2206   text_view = GTK_TEXT_VIEW (object);
2207
2208   g_return_if_fail (text_view->buffer == NULL);
2209
2210   gtk_text_view_destroy_layout (text_view);
2211   gtk_text_view_set_buffer (text_view, NULL);
2212
2213   if (text_view->pending_scroll)
2214     {
2215       free_pending_scroll (text_view->pending_scroll);
2216       text_view->pending_scroll = NULL;
2217     }
2218
2219   if (text_view->hadjustment)
2220     g_object_unref (G_OBJECT (text_view->hadjustment));
2221   if (text_view->vadjustment)
2222     g_object_unref (G_OBJECT (text_view->vadjustment));
2223
2224   text_window_free (text_view->text_window);
2225
2226   if (text_view->left_window)
2227     text_window_free (text_view->left_window);
2228
2229   if (text_view->top_window)
2230     text_window_free (text_view->top_window);
2231
2232   if (text_view->right_window)
2233     text_window_free (text_view->right_window);
2234
2235   if (text_view->bottom_window)
2236     text_window_free (text_view->bottom_window);
2237
2238   g_object_unref (G_OBJECT (text_view->im_context));
2239
2240   (* G_OBJECT_CLASS (parent_class)->finalize) (object);
2241 }
2242
2243 static void
2244 gtk_text_view_set_property (GObject         *object,
2245                             guint            prop_id,
2246                             const GValue    *value,
2247                             GParamSpec      *pspec)
2248 {
2249   GtkTextView *text_view;
2250
2251   text_view = GTK_TEXT_VIEW (object);
2252
2253   switch (prop_id)
2254     {
2255     case PROP_PIXELS_ABOVE_LINES:
2256       gtk_text_view_set_pixels_above_lines (text_view, g_value_get_int (value));
2257       break;
2258
2259     case PROP_PIXELS_BELOW_LINES:
2260       gtk_text_view_set_pixels_below_lines (text_view, g_value_get_int (value));
2261       break;
2262
2263     case PROP_PIXELS_INSIDE_WRAP:
2264       gtk_text_view_set_pixels_inside_wrap (text_view, g_value_get_int (value));
2265       break;
2266
2267     case PROP_EDITABLE:
2268       gtk_text_view_set_editable (text_view, g_value_get_boolean (value));
2269       break;
2270
2271     case PROP_WRAP_MODE:
2272       gtk_text_view_set_wrap_mode (text_view, g_value_get_enum (value));
2273       break;
2274
2275     case PROP_JUSTIFICATION:
2276       gtk_text_view_set_justification (text_view, g_value_get_enum (value));
2277       break;
2278
2279     case PROP_LEFT_MARGIN:
2280       gtk_text_view_set_left_margin (text_view, g_value_get_int (value));
2281       break;
2282
2283     case PROP_RIGHT_MARGIN:
2284       gtk_text_view_set_right_margin (text_view, g_value_get_int (value));
2285       break;
2286
2287     case PROP_INDENT:
2288       gtk_text_view_set_indent (text_view, g_value_get_int (value));
2289       break;
2290
2291     case PROP_TABS:
2292       gtk_text_view_set_tabs (text_view, g_value_get_object (value));
2293       break;
2294
2295     case PROP_CURSOR_VISIBLE:
2296       gtk_text_view_set_cursor_visible (text_view, g_value_get_boolean (value));
2297       break;
2298
2299     default:
2300       g_assert_not_reached ();
2301       break;
2302     }
2303 }
2304
2305 static void
2306 gtk_text_view_get_property (GObject         *object,
2307                             guint            prop_id,
2308                             GValue          *value,
2309                             GParamSpec      *pspec)
2310 {
2311   GtkTextView *text_view;
2312
2313   text_view = GTK_TEXT_VIEW (object);
2314
2315   switch (prop_id)
2316     {
2317     case PROP_PIXELS_ABOVE_LINES:
2318       g_value_set_int (value, text_view->pixels_above_lines);
2319       break;
2320
2321     case PROP_PIXELS_BELOW_LINES:
2322       g_value_set_int (value, text_view->pixels_below_lines);
2323       break;
2324
2325     case PROP_PIXELS_INSIDE_WRAP:
2326       g_value_set_int (value, text_view->pixels_inside_wrap);
2327       break;
2328
2329     case PROP_EDITABLE:
2330       g_value_set_boolean (value, text_view->editable);
2331       break;
2332
2333     case PROP_WRAP_MODE:
2334       g_value_set_enum (value, text_view->wrap_mode);
2335       break;
2336
2337     case PROP_JUSTIFICATION:
2338       g_value_set_enum (value, text_view->justify);
2339       break;
2340
2341     case PROP_LEFT_MARGIN:
2342       g_value_set_int (value, text_view->left_margin);
2343       break;
2344
2345     case PROP_RIGHT_MARGIN:
2346       g_value_set_int (value, text_view->right_margin);
2347       break;
2348
2349     case PROP_INDENT:
2350       g_value_set_int (value, text_view->indent);
2351       break;
2352
2353     case PROP_TABS:
2354       g_value_set_object (value, gtk_text_view_get_tabs (text_view));
2355       break;
2356
2357     case PROP_CURSOR_VISIBLE:
2358       g_value_set_boolean (value, text_view->cursor_visible);
2359       break;
2360
2361     default:
2362       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2363       break;
2364     }
2365 }
2366
2367 static void
2368 gtk_text_view_size_request (GtkWidget      *widget,
2369                             GtkRequisition *requisition)
2370 {
2371   GtkTextView *text_view;
2372   GSList *tmp_list;
2373   gint focus_edge_width;
2374   gboolean interior_focus;
2375
2376   text_view = GTK_TEXT_VIEW (widget);
2377
2378   gtk_widget_style_get (widget, "interior_focus", &interior_focus, NULL);
2379
2380   if (interior_focus)
2381     focus_edge_width = 0;
2382   else
2383     focus_edge_width = 1;
2384
2385   if (text_view->layout)
2386     {
2387       text_view->text_window->requisition.width = text_view->layout->width;
2388       text_view->text_window->requisition.height = text_view->layout->height;
2389     }
2390   else
2391     {
2392       text_view->text_window->requisition.width = 0;
2393       text_view->text_window->requisition.height = 0;
2394     }
2395
2396   requisition->width = text_view->text_window->requisition.width + focus_edge_width * 2;
2397   requisition->height = text_view->text_window->requisition.height + focus_edge_width * 2;
2398
2399   if (text_view->left_window)
2400     requisition->width += text_view->left_window->requisition.width;
2401
2402   if (text_view->right_window)
2403     requisition->width += text_view->right_window->requisition.width;
2404
2405   if (text_view->top_window)
2406     requisition->height += text_view->top_window->requisition.height;
2407
2408   if (text_view->bottom_window)
2409     requisition->height += text_view->bottom_window->requisition.height;
2410
2411   tmp_list = text_view->children;
2412   while (tmp_list != NULL)
2413     {
2414       GtkTextViewChild *child = tmp_list->data;
2415
2416       if (child->anchor)
2417         {
2418           GtkRequisition child_req;
2419           GtkRequisition old_req;
2420
2421           gtk_widget_get_child_requisition (child->widget, &old_req);
2422
2423           gtk_widget_size_request (child->widget, &child_req);
2424
2425           gtk_widget_get_child_requisition (child->widget, &child_req);
2426
2427           /* Invalidate layout lines if required */
2428           if (text_view->layout &&
2429               (old_req.width != child_req.width ||
2430                old_req.height != child_req.height))
2431             gtk_text_child_anchor_queue_resize (child->anchor,
2432                                                 text_view->layout);
2433         }
2434       else
2435         {
2436
2437         }
2438
2439       tmp_list = g_slist_next (tmp_list);
2440     }
2441 }
2442
2443 static void
2444 gtk_text_view_compute_child_allocation (GtkTextView      *text_view,
2445                                         GtkTextViewChild *vc,
2446                                         GtkAllocation    *allocation)
2447 {
2448   gint buffer_y;
2449   GtkTextIter iter;
2450   GtkRequisition req;
2451
2452   gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
2453                                             &iter,
2454                                             vc->anchor);
2455
2456   gtk_text_layout_get_line_yrange (text_view->layout, &iter,
2457                                    &buffer_y, NULL);
2458
2459   buffer_y += vc->from_top_of_line;
2460
2461   allocation->x = vc->from_left_of_buffer - text_view->xoffset;
2462   allocation->y = buffer_y - text_view->yoffset;
2463
2464   gtk_widget_get_child_requisition (vc->widget, &req);
2465   allocation->width = req.width;
2466   allocation->height = req.height;
2467 }
2468
2469 static void
2470 gtk_text_view_update_child_allocation (GtkTextView      *text_view,
2471                                        GtkTextViewChild *vc)
2472 {
2473   GtkAllocation allocation;
2474
2475   gtk_text_view_compute_child_allocation (text_view, vc, &allocation);
2476
2477   gtk_widget_size_allocate (vc->widget, &allocation);
2478
2479 #if 0
2480   g_print ("allocation for %p allocated to %d,%d yoffset = %d\n",
2481            vc->widget,
2482            vc->widget->allocation.x,
2483            vc->widget->allocation.y,
2484            text_view->yoffset);
2485 #endif
2486 }
2487
2488 static void
2489 gtk_text_view_child_allocated (GtkTextLayout *layout,
2490                                GtkWidget     *child,
2491                                gint           x,
2492                                gint           y,
2493                                gpointer       data)
2494 {
2495   GtkTextViewChild *vc = NULL;
2496   GtkTextView *text_view = data;
2497
2498   /* x,y is the position of the child from the top of the line, and
2499    * from the left of the buffer. We have to translate that into text
2500    * window coordinates, then size_allocate the child.
2501    */
2502
2503   vc = g_object_get_data (G_OBJECT (child),
2504                           "gtk-text-view-child");
2505
2506   g_assert (vc != NULL);
2507
2508   DV (g_print ("child allocated at %d,%d\n", x, y));
2509
2510   vc->from_left_of_buffer = x;
2511   vc->from_top_of_line = y;
2512
2513   gtk_text_view_update_child_allocation (text_view, vc);
2514 }
2515
2516 static void
2517 gtk_text_view_validate_children (GtkTextView *text_view)
2518 {
2519   GSList *tmp_list;
2520
2521   DV(g_print(G_STRLOC"\n"));
2522
2523   tmp_list = text_view->children;
2524   while (tmp_list != NULL)
2525     {
2526       GtkTextViewChild *child = tmp_list->data;
2527
2528       if (child->anchor)
2529         {
2530           /* We need to force-validate the regions containing
2531            * children.
2532            */
2533           GtkTextIter child_loc;
2534           gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
2535                                                     &child_loc,
2536                                                     child->anchor);
2537
2538           gtk_text_layout_validate_yrange (text_view->layout,
2539                                            &child_loc,
2540                                            0, 1);
2541         }
2542       else
2543         {
2544
2545         }
2546
2547       tmp_list = g_slist_next (tmp_list);
2548     }
2549 }
2550
2551 static void
2552 gtk_text_view_size_allocate (GtkWidget *widget,
2553                              GtkAllocation *allocation)
2554 {
2555   GtkTextView *text_view;
2556   GtkTextIter first_para;
2557   gint y;
2558   GtkAdjustment *vadj;
2559   gboolean yoffset_changed = FALSE;
2560   gint width, height;
2561   GdkRectangle text_rect;
2562   GdkRectangle left_rect;
2563   GdkRectangle right_rect;
2564   GdkRectangle top_rect;
2565   GdkRectangle bottom_rect;
2566   gint focus_edge_width;
2567   gboolean interior_focus;
2568
2569   text_view = GTK_TEXT_VIEW (widget);
2570
2571   DV(g_print(G_STRLOC"\n"));
2572
2573   widget->allocation = *allocation;
2574
2575   if (GTK_WIDGET_REALIZED (widget))
2576     {
2577       gdk_window_move_resize (widget->window,
2578                               allocation->x, allocation->y,
2579                               allocation->width, allocation->height);
2580     }
2581
2582   /* distribute width/height among child windows. Ensure all
2583    * windows get at least a 1x1 allocation.
2584    */
2585
2586   gtk_widget_style_get (widget, "interior_focus", &interior_focus, NULL);
2587
2588   if (interior_focus)
2589     focus_edge_width = 0;
2590   else
2591     focus_edge_width = 1;
2592
2593   width = allocation->width - focus_edge_width * 2;
2594
2595   if (text_view->left_window)
2596     left_rect.width = text_view->left_window->requisition.width;
2597   else
2598     left_rect.width = 1;
2599
2600   width -= left_rect.width;
2601
2602   if (text_view->right_window)
2603     right_rect.width = text_view->right_window->requisition.width;
2604   else
2605     right_rect.width = 1;
2606
2607   width -= right_rect.width;
2608
2609   text_rect.width = MAX (1, width);
2610
2611   top_rect.width = text_rect.width;
2612   bottom_rect.width = text_rect.width;
2613
2614
2615   height = allocation->height - focus_edge_width * 2;
2616
2617   if (text_view->top_window)
2618     top_rect.height = text_view->top_window->requisition.height;
2619   else
2620     top_rect.height = 1;
2621
2622   height -= top_rect.height;
2623
2624   if (text_view->bottom_window)
2625     bottom_rect.height = text_view->bottom_window->requisition.height;
2626   else
2627     bottom_rect.height = 1;
2628
2629   height -= bottom_rect.height;
2630
2631   text_rect.height = MAX (1, height);
2632
2633   left_rect.height = text_rect.height;
2634   right_rect.height = text_rect.height;
2635
2636   /* Origins */
2637   left_rect.x = focus_edge_width;
2638   top_rect.y = focus_edge_width;
2639
2640   text_rect.x = left_rect.x + left_rect.width;
2641   text_rect.y = top_rect.y + top_rect.height;
2642
2643   left_rect.y = text_rect.y;
2644   right_rect.y = text_rect.y;
2645
2646   top_rect.x = text_rect.x;
2647   bottom_rect.x = text_rect.x;
2648
2649   right_rect.x = text_rect.x + text_rect.width;
2650   bottom_rect.y = text_rect.y + text_rect.height;
2651
2652   text_window_size_allocate (text_view->text_window,
2653                              &text_rect);
2654
2655   if (text_view->left_window)
2656     text_window_size_allocate (text_view->left_window,
2657                                &left_rect);
2658
2659   if (text_view->right_window)
2660     text_window_size_allocate (text_view->right_window,
2661                                &right_rect);
2662
2663   if (text_view->top_window)
2664     text_window_size_allocate (text_view->top_window,
2665                                &top_rect);
2666
2667   if (text_view->bottom_window)
2668     text_window_size_allocate (text_view->bottom_window,
2669                                &bottom_rect);
2670
2671   gtk_text_view_update_layout_width (text_view);
2672
2673   /* This is because validating children ends up size allocating them. */
2674   gtk_text_view_validate_children (text_view);
2675
2676   /* Now adjust the value of the adjustment to keep the cursor at the
2677    * same place in the buffer
2678    */
2679   gtk_text_view_get_first_para_iter (text_view, &first_para);
2680   gtk_text_layout_get_line_yrange (text_view->layout, &first_para, &y, NULL);
2681
2682   y += text_view->first_para_pixels;
2683
2684   /* Ensure h/v adj exist */
2685   get_hadjustment (text_view);
2686   get_vadjustment (text_view);
2687
2688   vadj = text_view->vadjustment;
2689   if (y > vadj->upper - vadj->page_size)
2690     y = MAX (0, vadj->upper - vadj->page_size);
2691
2692   if (y != text_view->yoffset)
2693     {
2694       vadj->value = text_view->yoffset = y;
2695       yoffset_changed = TRUE;
2696     }
2697
2698   text_view->hadjustment->page_size = SCREEN_WIDTH (text_view);
2699   text_view->hadjustment->page_increment = SCREEN_WIDTH (text_view) / 2;
2700   text_view->hadjustment->lower = 0;
2701   text_view->hadjustment->upper = MAX (SCREEN_WIDTH (text_view),
2702                                        text_view->width);
2703   gtk_signal_emit_by_name (GTK_OBJECT (text_view->hadjustment), "changed");
2704
2705   text_view->vadjustment->page_size = SCREEN_HEIGHT (text_view);
2706   text_view->vadjustment->page_increment = SCREEN_HEIGHT (text_view) / 2;
2707   text_view->vadjustment->lower = 0;
2708   text_view->vadjustment->upper = MAX (SCREEN_HEIGHT (text_view),
2709                                        text_view->height);
2710   gtk_signal_emit_by_name (GTK_OBJECT (text_view->vadjustment), "changed");
2711
2712   if (yoffset_changed)
2713     gtk_adjustment_value_changed (vadj);
2714
2715   if (text_view->first_validate_idle != 0)
2716     {
2717       /* The GTK resize loop processes all the pending exposes right
2718        * after doing the resize stuff, so the idle sizer won't have a
2719        * chance to run. So we do the work here.
2720        */
2721
2722       g_source_remove (text_view->first_validate_idle);
2723       text_view->first_validate_idle = 0;
2724
2725       if (!gtk_text_view_flush_scroll (text_view))
2726         gtk_text_view_validate_onscreen (text_view);
2727     }
2728 }
2729
2730 static void
2731 gtk_text_view_get_first_para_iter (GtkTextView *text_view,
2732                                    GtkTextIter *iter)
2733 {
2734   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), iter,
2735                                     text_view->first_para_mark);
2736 }
2737
2738 static void
2739 gtk_text_view_validate_onscreen (GtkTextView *text_view)
2740 {
2741   GtkWidget *widget = GTK_WIDGET (text_view);
2742
2743   DV(g_print(">Validating onscreen ("G_STRLOC")\n"));
2744
2745   if (SCREEN_HEIGHT (widget) > 0)
2746     {
2747       GtkTextIter first_para;
2748
2749       /* Be sure we've validated the stuff onscreen; if we
2750        * scrolled, these calls won't have any effect, because
2751        * they were called in the recursive validate_onscreen
2752        */
2753       gtk_text_view_get_first_para_iter (text_view, &first_para);
2754
2755       gtk_text_layout_validate_yrange (text_view->layout,
2756                                        &first_para,
2757                                        0,
2758                                        text_view->first_para_pixels +
2759                                        SCREEN_HEIGHT (widget));
2760     }
2761
2762   text_view->onscreen_validated = TRUE;
2763
2764   DV(g_print(">Done validating onscreen, onscreen_validated = TRUE ("G_STRLOC")\n"));
2765
2766   /* This can have the odd side effect of triggering a scroll, which should
2767    * flip "onscreen_validated" back to FALSE, but should also get us
2768    * back into this function to turn it on again.
2769    */
2770   gtk_text_view_update_adjustments (text_view);
2771
2772   g_assert (text_view->onscreen_validated);
2773 }
2774
2775 static gboolean
2776 first_validate_callback (gpointer data)
2777 {
2778   GtkTextView *text_view = data;
2779
2780   GDK_THREADS_ENTER ();
2781
2782   /* Note that some of this code is duplicated at the end of size_allocate,
2783    * keep in sync with that.
2784    */
2785
2786   DV(g_print(G_STRLOC"\n"));
2787
2788   /* Do this first, which means that if an "invalidate"
2789    * occurs during any of this process, a new first_validate_callback
2790    * will be installed, and we'll start again.
2791    */
2792   text_view->first_validate_idle = 0;
2793
2794   /* be sure we have up-to-date screen size set on the
2795    * layout.
2796    */
2797   gtk_text_view_update_layout_width (text_view);
2798
2799   /* Bail out if we invalidated stuff; scrolling right away will just
2800    * confuse the issue.
2801    */
2802   if (text_view->first_validate_idle != 0)
2803     {
2804       DV(g_print(">Width change forced requeue ("G_STRLOC")\n"));
2805     }
2806   else
2807     {
2808       /* scroll to any marks, if that's pending. This can
2809        * jump us to the validation codepath used for scrolling
2810        * onscreen, if so we bail out.
2811        */
2812       if (!gtk_text_view_flush_scroll (text_view))
2813         gtk_text_view_validate_onscreen (text_view);
2814
2815       DV(g_print(">Leaving first validate idle ("G_STRLOC")\n"));
2816
2817       g_assert (text_view->onscreen_validated);
2818
2819     }
2820
2821   GDK_THREADS_LEAVE ();
2822
2823   return FALSE;
2824 }
2825
2826 static gboolean
2827 incremental_validate_callback (gpointer data)
2828 {
2829   GtkTextView *text_view = data;
2830   gboolean result = TRUE;
2831
2832   GDK_THREADS_ENTER ();
2833
2834   DV(g_print(G_STRLOC"\n"));
2835
2836   gtk_text_layout_validate (text_view->layout, 2000);
2837
2838   gtk_text_view_update_adjustments (text_view);
2839
2840   if (gtk_text_layout_is_valid (text_view->layout))
2841     {
2842       text_view->incremental_validate_idle = 0;
2843       result = FALSE;
2844     }
2845
2846   GDK_THREADS_LEAVE ();
2847
2848   return result;
2849 }
2850
2851 static void
2852 gtk_text_view_invalidate (GtkTextView *text_view)
2853 {
2854   text_view->onscreen_validated = FALSE;
2855
2856   DV(g_print(">Invalidate, onscreen_validated = FALSE ("G_STRLOC")\n"));
2857
2858   if (!text_view->first_validate_idle)
2859     {
2860       text_view->first_validate_idle = g_idle_add_full (GTK_PRIORITY_RESIZE - 2, first_validate_callback, text_view, NULL);
2861       DV (g_print (G_STRLOC": adding first validate idle %d\n",
2862                    text_view->first_validate_idle));
2863     }
2864
2865   if (!text_view->incremental_validate_idle)
2866     {
2867       text_view->incremental_validate_idle = g_idle_add_full (GTK_TEXT_VIEW_PRIORITY_VALIDATE, incremental_validate_callback, text_view, NULL);
2868       DV (g_print (G_STRLOC": adding incremental validate idle %d\n",
2869                    text_view->incremental_validate_idle));
2870     }
2871 }
2872
2873 static void
2874 invalidated_handler (GtkTextLayout *layout,
2875                      gpointer       data)
2876 {
2877   GtkTextView *text_view;
2878
2879   text_view = GTK_TEXT_VIEW (data);
2880
2881   gtk_text_view_invalidate (text_view);
2882 }
2883
2884 static void
2885 changed_handler (GtkTextLayout     *layout,
2886                  gint               start_y,
2887                  gint               old_height,
2888                  gint               new_height,
2889                  gpointer           data)
2890 {
2891   GtkTextView *text_view;
2892   GtkWidget *widget;
2893   GdkRectangle visible_rect;
2894   GdkRectangle redraw_rect;
2895
2896   text_view = GTK_TEXT_VIEW (data);
2897   widget = GTK_WIDGET (data);
2898
2899   DV(g_print(">Lines Validated ("G_STRLOC")\n"));
2900
2901   if (GTK_WIDGET_REALIZED (text_view))
2902     {
2903       gtk_text_view_get_visible_rect (text_view, &visible_rect);
2904
2905       redraw_rect.x = visible_rect.x;
2906       redraw_rect.width = visible_rect.width;
2907       redraw_rect.y = start_y;
2908
2909       if (old_height == new_height)
2910         redraw_rect.height = old_height;
2911       else
2912         redraw_rect.height = MAX (0, visible_rect.y + visible_rect.height - start_y);
2913
2914       if (gdk_rectangle_intersect (&redraw_rect, &visible_rect, &redraw_rect))
2915         {
2916           /* text_window_invalidate_rect() takes buffer coordinates */
2917           text_window_invalidate_rect (text_view->text_window,
2918                                        &redraw_rect);
2919
2920           DV(g_print(" invalidated rect: %d,%d %d x %d\n",
2921                      redraw_rect.x,
2922                      redraw_rect.y,
2923                      redraw_rect.width,
2924                      redraw_rect.height));
2925
2926           if (text_view->left_window)
2927             text_window_invalidate_rect (text_view->left_window,
2928                                          &redraw_rect);
2929           if (text_view->right_window)
2930             text_window_invalidate_rect (text_view->right_window,
2931                                          &redraw_rect);
2932           if (text_view->top_window)
2933             text_window_invalidate_rect (text_view->top_window,
2934                                          &redraw_rect);
2935           if (text_view->bottom_window)
2936             text_window_invalidate_rect (text_view->bottom_window,
2937                                          &redraw_rect);
2938
2939           gtk_text_view_update_im_spot_location (text_view);
2940         }
2941     }
2942
2943   if (old_height != new_height)
2944     {
2945       gboolean yoffset_changed = FALSE;
2946       GSList *tmp_list;
2947       int new_first_para_top;
2948       int old_first_para_top;
2949       GtkTextIter first;
2950
2951       /* If the bottom of the old area was above the top of the
2952        * screen, we need to scroll to keep the current top of the
2953        * screen in place.  Remember that first_para_pixels is the
2954        * position of the top of the screen in coordinates relative to
2955        * the first paragraph onscreen.
2956        *
2957        * In short we are adding the height delta of the portion of the
2958        * changed region above first_para_mark to text_view->yoffset.
2959        */
2960       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &first,
2961                                         text_view->first_para_mark);
2962
2963       gtk_text_layout_get_line_yrange (layout, &first, &new_first_para_top, NULL);
2964
2965       old_first_para_top = text_view->yoffset - text_view->first_para_pixels;
2966
2967       if (new_first_para_top != old_first_para_top)
2968         {
2969           text_view->yoffset += new_first_para_top - old_first_para_top;
2970
2971           get_vadjustment (text_view)->value = text_view->yoffset;
2972           yoffset_changed = TRUE;
2973         }
2974
2975       if (yoffset_changed)
2976         gtk_adjustment_value_changed (get_vadjustment (text_view));
2977
2978       /* FIXME be smarter about which anchored widgets we update */
2979
2980       tmp_list = text_view->children;
2981       while (tmp_list != NULL)
2982         {
2983           GtkTextViewChild *child = tmp_list->data;
2984
2985           if (child->anchor)
2986             gtk_text_view_update_child_allocation (text_view, child);
2987
2988           tmp_list = g_slist_next (tmp_list);
2989         }
2990     }
2991
2992   gtk_widget_queue_resize (widget);
2993 }
2994
2995 static void
2996 gtk_text_view_realize_cursor_gc (GtkTextView *text_view)
2997 {
2998   GdkColor *cursor_color;
2999   GdkColor red = { 0, 0xffff, 0x0000, 0x0000 };
3000
3001   if (text_view->cursor_gc)
3002     gdk_gc_unref (text_view->cursor_gc);
3003
3004   gtk_widget_style_get (GTK_WIDGET (text_view), "cursor_color", &cursor_color, NULL);
3005
3006   if (!cursor_color)
3007     cursor_color = &red;
3008
3009   text_view->cursor_gc = gdk_gc_new (text_view->text_window->bin_window);
3010   gdk_gc_set_rgb_fg_color (text_view->cursor_gc, cursor_color);
3011 }
3012
3013 static void
3014 gtk_text_view_realize (GtkWidget *widget)
3015 {
3016   GtkTextView *text_view;
3017   GdkWindowAttr attributes;
3018   gint attributes_mask;
3019   GSList *tmp_list;
3020
3021   text_view = GTK_TEXT_VIEW (widget);
3022   GTK_WIDGET_SET_FLAGS (text_view, GTK_REALIZED);
3023
3024   attributes.window_type = GDK_WINDOW_CHILD;
3025   attributes.x = widget->allocation.x;
3026   attributes.y = widget->allocation.y;
3027   attributes.width = widget->allocation.width;
3028   attributes.height = widget->allocation.height;
3029   attributes.wclass = GDK_INPUT_OUTPUT;
3030   attributes.visual = gtk_widget_get_visual (widget);
3031   attributes.colormap = gtk_widget_get_colormap (widget);
3032   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK | GDK_EXPOSURE_MASK;
3033
3034   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
3035
3036   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
3037                                    &attributes, attributes_mask);
3038   gdk_window_set_user_data (widget->window, widget);
3039
3040   /* must come before text_window_realize calls */
3041   widget->style = gtk_style_attach (widget->style, widget->window);
3042
3043   gdk_window_set_background (widget->window,
3044                              &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3045
3046   text_window_realize (text_view->text_window, widget->window);
3047
3048   if (text_view->left_window)
3049     text_window_realize (text_view->left_window,
3050                          widget->window);
3051
3052   if (text_view->top_window)
3053     text_window_realize (text_view->top_window,
3054                          widget->window);
3055
3056   if (text_view->right_window)
3057     text_window_realize (text_view->right_window,
3058                          widget->window);
3059
3060   if (text_view->bottom_window)
3061     text_window_realize (text_view->bottom_window,
3062                          widget->window);
3063
3064   gtk_text_view_realize_cursor_gc (text_view);
3065
3066   gtk_text_view_ensure_layout (text_view);
3067
3068   if (text_view->buffer)
3069     gtk_text_buffer_add_selection_clipboard (text_view->buffer,
3070                                              gtk_clipboard_get (GDK_SELECTION_PRIMARY));
3071
3072   tmp_list = text_view->children;
3073   while (tmp_list != NULL)
3074     {
3075       GtkTextViewChild *vc = tmp_list->data;
3076
3077       text_view_child_set_parent_window (text_view, vc);
3078
3079       tmp_list = tmp_list->next;
3080     }
3081 }
3082
3083 static void
3084 gtk_text_view_unrealize (GtkWidget *widget)
3085 {
3086   GtkTextView *text_view;
3087
3088   text_view = GTK_TEXT_VIEW (widget);
3089
3090   if (text_view->buffer)
3091     gtk_text_buffer_remove_selection_clipboard (text_view->buffer,
3092                                                 gtk_clipboard_get (GDK_SELECTION_PRIMARY));
3093
3094   if (text_view->cursor_gc)
3095     {
3096       gdk_gc_unref (text_view->cursor_gc);
3097       text_view->cursor_gc = NULL;
3098     }
3099
3100   gtk_text_view_remove_validate_idles (text_view);
3101
3102   if (text_view->popup_menu)
3103     {
3104       gtk_widget_destroy (text_view->popup_menu);
3105       text_view->popup_menu = NULL;
3106     }
3107
3108   text_window_unrealize (text_view->text_window);
3109
3110   if (text_view->left_window)
3111     text_window_unrealize (text_view->left_window);
3112
3113   if (text_view->top_window)
3114     text_window_unrealize (text_view->top_window);
3115
3116   if (text_view->right_window)
3117     text_window_unrealize (text_view->right_window);
3118
3119   if (text_view->bottom_window)
3120     text_window_unrealize (text_view->bottom_window);
3121
3122   gtk_text_view_destroy_layout (text_view);
3123
3124   (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
3125 }
3126
3127 static void
3128 gtk_text_view_style_set (GtkWidget *widget,
3129                          GtkStyle  *previous_style)
3130 {
3131   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3132
3133   if (GTK_WIDGET_REALIZED (widget))
3134     {
3135       gdk_window_set_background (widget->window,
3136                                  &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3137
3138       gdk_window_set_background (text_view->text_window->bin_window,
3139                                  &widget->style->base[GTK_WIDGET_STATE (widget)]);
3140
3141       if (text_view->left_window)
3142         gdk_window_set_background (text_view->left_window->bin_window,
3143                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3144       if (text_view->right_window)
3145         gdk_window_set_background (text_view->right_window->bin_window,
3146                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3147
3148       if (text_view->top_window)
3149         gdk_window_set_background (text_view->top_window->bin_window,
3150                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3151
3152       if (text_view->bottom_window)
3153         gdk_window_set_background (text_view->bottom_window->bin_window,
3154                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3155
3156       gtk_text_view_realize_cursor_gc (text_view);
3157     }
3158
3159   if (text_view->layout && previous_style)
3160     {
3161       gtk_text_view_set_attributes_from_style (text_view,
3162                                                text_view->layout->default_style,
3163                                                widget->style);
3164       gtk_text_layout_default_style_changed (text_view->layout);
3165     }
3166 }
3167
3168 static void
3169 gtk_text_view_direction_changed (GtkWidget        *widget,
3170                                  GtkTextDirection  previous_direction)
3171 {
3172   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3173
3174   if (text_view->layout)
3175     {
3176       text_view->layout->default_style->direction = gtk_widget_get_direction (widget);
3177       gtk_text_layout_default_style_changed (text_view->layout);
3178     }
3179 }
3180
3181 /*
3182  * Events
3183  */
3184
3185 static gboolean
3186 get_event_coordinates (GdkEvent *event, gint *x, gint *y)
3187 {
3188   if (event)
3189     switch (event->type)
3190       {
3191       case GDK_MOTION_NOTIFY:
3192         *x = event->motion.x;
3193         *y = event->motion.y;
3194         return TRUE;
3195         break;
3196
3197       case GDK_BUTTON_PRESS:
3198       case GDK_2BUTTON_PRESS:
3199       case GDK_3BUTTON_PRESS:
3200       case GDK_BUTTON_RELEASE:
3201         *x = event->button.x;
3202         *y = event->button.y;
3203         return TRUE;
3204         break;
3205
3206       case GDK_KEY_PRESS:
3207       case GDK_KEY_RELEASE:
3208       case GDK_ENTER_NOTIFY:
3209       case GDK_LEAVE_NOTIFY:
3210       case GDK_PROPERTY_NOTIFY:
3211       case GDK_SELECTION_CLEAR:
3212       case GDK_SELECTION_REQUEST:
3213       case GDK_SELECTION_NOTIFY:
3214       case GDK_PROXIMITY_IN:
3215       case GDK_PROXIMITY_OUT:
3216       case GDK_DRAG_ENTER:
3217       case GDK_DRAG_LEAVE:
3218       case GDK_DRAG_MOTION:
3219       case GDK_DRAG_STATUS:
3220       case GDK_DROP_START:
3221       case GDK_DROP_FINISHED:
3222       default:
3223         return FALSE;
3224         break;
3225       }
3226
3227   return FALSE;
3228 }
3229
3230 static gint
3231 emit_event_on_tags (GtkWidget   *widget,
3232                     GdkEvent    *event,
3233                     GtkTextIter *iter)
3234 {
3235   GSList *tags;
3236   GSList *tmp;
3237   gboolean retval = FALSE;
3238   GtkTextView *text_view;
3239
3240   text_view = GTK_TEXT_VIEW (widget);
3241
3242   tags = gtk_text_iter_get_tags (iter);
3243
3244   tmp = tags;
3245   while (tmp != NULL)
3246     {
3247       GtkTextTag *tag = tmp->data;
3248
3249       if (gtk_text_tag_event (tag, G_OBJECT (widget), event, iter))
3250         {
3251           retval = TRUE;
3252           break;
3253         }
3254
3255       tmp = g_slist_next (tmp);
3256     }
3257
3258   g_slist_free (tags);
3259
3260   return retval;
3261 }
3262
3263 static gint
3264 gtk_text_view_event (GtkWidget *widget, GdkEvent *event)
3265 {
3266   GtkTextView *text_view;
3267   gint x = 0, y = 0;
3268
3269   text_view = GTK_TEXT_VIEW (widget);
3270
3271   if (text_view->layout == NULL ||
3272       get_buffer (text_view) == NULL)
3273     return FALSE;
3274
3275   if (event->any.window != text_view->text_window->bin_window)
3276     return FALSE;
3277
3278   if (get_event_coordinates (event, &x, &y))
3279     {
3280       GtkTextIter iter;
3281
3282       x += text_view->xoffset;
3283       y += text_view->yoffset;
3284
3285       /* FIXME this is slow and we do it twice per event.
3286        * My favorite solution is to have GtkTextLayout cache
3287        * the last couple lookups.
3288        */
3289       gtk_text_layout_get_iter_at_pixel (text_view->layout,
3290                                          &iter,
3291                                          x, y);
3292
3293       return emit_event_on_tags (widget, event, &iter);
3294     }
3295   else if (event->type == GDK_KEY_PRESS ||
3296            event->type == GDK_KEY_RELEASE)
3297     {
3298       GtkTextMark *insert;
3299       GtkTextIter iter;
3300
3301       insert = gtk_text_buffer_get_mark (get_buffer (text_view),
3302                                          "insert");
3303
3304       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
3305
3306       return emit_event_on_tags (widget, event, &iter);
3307     }
3308   else
3309     return FALSE;
3310 }
3311
3312 static gint
3313 gtk_text_view_key_press_event (GtkWidget *widget, GdkEventKey *event)
3314 {
3315   gboolean retval = FALSE;
3316   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3317   GtkTextMark *insert;
3318   GtkTextIter iter;
3319
3320   if (text_view->layout == NULL ||
3321       get_buffer (text_view) == NULL)
3322     return FALSE;
3323
3324   insert = gtk_text_buffer_get_insert (get_buffer (text_view));
3325   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
3326   if (gtk_text_iter_can_insert (&iter, text_view->editable) &&
3327       gtk_im_context_filter_keypress (text_view->im_context, event))
3328     {
3329       text_view->need_im_reset = TRUE;
3330       retval = TRUE;
3331     }
3332   else if (GTK_WIDGET_CLASS (parent_class)->key_press_event &&
3333            GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, event))
3334     retval = TRUE;
3335   else if (event->keyval == GDK_Return ||
3336            event->keyval == GDK_KP_Enter)
3337     {
3338       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\n", 1,
3339                                                     text_view->editable);
3340       DV(g_print (G_STRLOC": scrolling to mark\n"));
3341       gtk_text_view_scroll_to_mark (text_view,
3342                                     gtk_text_buffer_get_mark (get_buffer (text_view),
3343                                                               "insert"),
3344                                     0.0, FALSE, 0.0, 0.0);
3345       retval = TRUE;
3346     }
3347   /* Pass through Tab as literal tab, unless Control is held down */
3348   else if ((event->keyval == GDK_Tab ||
3349             event->keyval == GDK_KP_Tab ||
3350             event->keyval == GDK_ISO_Left_Tab) &&
3351            !(event->state & GDK_CONTROL_MASK))
3352     {
3353       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\t", 1,
3354                                                     text_view->editable);
3355       DV(g_print (G_STRLOC": scrolling onscreen\n"));
3356       gtk_text_view_scroll_mark_onscreen (text_view,
3357                                           gtk_text_buffer_get_mark (get_buffer (text_view),
3358                                                                     "insert"));
3359       retval = TRUE;
3360     }
3361   else
3362     retval = FALSE;
3363
3364   gtk_text_view_pend_cursor_blink (text_view);
3365
3366   return retval;
3367 }
3368
3369 static gint
3370 gtk_text_view_key_release_event (GtkWidget *widget, GdkEventKey *event)
3371 {
3372   return FALSE;
3373 }
3374
3375 static gint
3376 gtk_text_view_button_press_event (GtkWidget *widget, GdkEventButton *event)
3377 {
3378   GtkTextView *text_view;
3379
3380   text_view = GTK_TEXT_VIEW (widget);
3381
3382   text_view->disable_scroll_on_focus = TRUE;
3383   gtk_widget_grab_focus (widget);
3384   text_view->disable_scroll_on_focus = FALSE;
3385
3386   if (event->window != text_view->text_window->bin_window)
3387     {
3388       /* Remove selection if any. */
3389       gtk_text_view_unselect (text_view);
3390       return FALSE;
3391     }
3392
3393 #if 0
3394   /* debug hack */
3395   if (event->button == 3 && (event->state & GDK_CONTROL_MASK) != 0)
3396     _gtk_text_buffer_spew (GTK_TEXT_VIEW (widget)->buffer);
3397   else if (event->button == 3)
3398     gtk_text_layout_spew (GTK_TEXT_VIEW (widget)->layout);
3399 #endif
3400
3401   if (event->type == GDK_BUTTON_PRESS)
3402     {
3403       gtk_text_view_reset_im_context (text_view);
3404
3405       if (event->button == 1)
3406         {
3407           /* If we're in the selection, start a drag copy/move of the
3408            * selection; otherwise, start creating a new selection.
3409            */
3410           GtkTextIter iter;
3411           GtkTextIter start, end;
3412
3413           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3414                                              &iter,
3415                                              event->x + text_view->xoffset,
3416                                              event->y + text_view->yoffset);
3417
3418           if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
3419                                                     &start, &end) &&
3420               gtk_text_iter_in_range (&iter, &start, &end))
3421             {
3422               text_view->drag_start_x = event->x;
3423               text_view->drag_start_y = event->y;
3424               text_view->pending_place_cursor_button = event->button;
3425             }
3426           else
3427             {
3428               gtk_text_view_start_selection_drag (text_view, &iter, event);
3429             }
3430
3431           return TRUE;
3432         }
3433       else if (event->button == 2)
3434         {
3435           GtkTextIter iter;
3436
3437           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3438                                              &iter,
3439                                              event->x + text_view->xoffset,
3440                                              event->y + text_view->yoffset);
3441
3442           gtk_text_buffer_paste_clipboard (get_buffer (text_view),
3443                                            gtk_clipboard_get (GDK_SELECTION_PRIMARY),
3444                                            &iter,
3445                                            text_view->editable);
3446           return TRUE;
3447         }
3448       else if (event->button == 3)
3449         {
3450           gtk_text_view_do_popup (text_view, event);
3451         }
3452     }
3453   else if ((event->type == GDK_2BUTTON_PRESS ||
3454             event->type == GDK_3BUTTON_PRESS) &&
3455            event->button == 1)
3456     {
3457       GtkTextIter start, end;
3458
3459       /* End the selection drag, otherwise we'd clear the new
3460        * word/line selection on button release
3461        */
3462       gtk_text_view_end_selection_drag (text_view, event);
3463
3464       gtk_text_layout_get_iter_at_pixel (text_view->layout,
3465                                          &start,
3466                                          event->x + text_view->xoffset,
3467                                          event->y + text_view->yoffset);
3468
3469       end = start;
3470
3471       if (event->type == GDK_2BUTTON_PRESS)
3472         {
3473           if (gtk_text_iter_inside_word (&start))
3474             {
3475               if (!gtk_text_iter_starts_word (&start))
3476                 gtk_text_iter_backward_word_start (&start);
3477
3478               if (!gtk_text_iter_ends_word (&end))
3479                 gtk_text_iter_forward_word_end (&end);
3480             }
3481         }
3482       else if (event->type == GDK_3BUTTON_PRESS)
3483         {
3484           if (gtk_text_view_starts_display_line (text_view, &start))
3485             {
3486               /* If on a display line boundary, we assume the user
3487                * clicked off the end of a line and we therefore select
3488                * the line before the boundary.
3489                */
3490               gtk_text_view_backward_display_line_start (text_view, &start);
3491             }
3492           else
3493             {
3494               /* start isn't on the start of a line, so we move it to the
3495                * start, and move end to the end unless it's already there.
3496                */
3497               gtk_text_view_backward_display_line_start (text_view, &start);
3498
3499               if (!gtk_text_view_starts_display_line (text_view, &end))
3500                 gtk_text_view_forward_display_line_end (text_view, &end);
3501             }
3502         }
3503
3504       gtk_text_buffer_move_mark (get_buffer (text_view),
3505                                  gtk_text_buffer_get_selection_bound (get_buffer (text_view)),
3506                                  &start);
3507       gtk_text_buffer_move_mark (get_buffer (text_view),
3508                                  gtk_text_buffer_get_insert (get_buffer (text_view)),
3509                                  &end);
3510
3511       text_view->just_selected_element = TRUE;
3512
3513       return TRUE;
3514     }
3515
3516   return FALSE;
3517 }
3518
3519 static gint
3520 gtk_text_view_button_release_event (GtkWidget *widget, GdkEventButton *event)
3521 {
3522   GtkTextView *text_view;
3523
3524   text_view = GTK_TEXT_VIEW (widget);
3525
3526   if (event->window != text_view->text_window->bin_window)
3527     return FALSE;
3528
3529   if (event->button == 1)
3530     {
3531       if (text_view->drag_start_x >= 0)
3532         {
3533           text_view->drag_start_x = -1;
3534           text_view->drag_start_y = -1;
3535         }
3536
3537       if (gtk_text_view_end_selection_drag (GTK_TEXT_VIEW (widget), event))
3538         return TRUE;
3539       else if (text_view->just_selected_element)
3540         {
3541           text_view->just_selected_element = FALSE;
3542           return FALSE;
3543         }
3544       else if (text_view->pending_place_cursor_button == event->button)
3545         {
3546           GtkTextIter iter;
3547
3548           /* Unselect everything; we clicked inside selection, but
3549            * didn't move by the drag threshold, so just clear selection
3550            * and place cursor.
3551            */
3552           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3553                                              &iter,
3554                                              event->x + text_view->xoffset,
3555                                              event->y + text_view->yoffset);
3556
3557           gtk_text_buffer_place_cursor (get_buffer (text_view), &iter);
3558
3559           text_view->pending_place_cursor_button = 0;
3560
3561           return FALSE;
3562         }
3563     }
3564
3565   return FALSE;
3566 }
3567
3568 static void
3569 keymap_direction_changed (GdkKeymap   *keymap,
3570                           GtkTextView *text_view)
3571 {
3572   gtk_text_view_check_keymap_direction (text_view);
3573 }
3574
3575 static gint
3576 gtk_text_view_focus_in_event (GtkWidget *widget, GdkEventFocus *event)
3577 {
3578   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3579
3580   GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3581   gtk_widget_queue_draw (widget);
3582
3583   DV(g_print (G_STRLOC": focus_in_event\n"));
3584
3585   if (text_view->cursor_visible && text_view->layout)
3586     {
3587       gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3588       gtk_text_view_check_cursor_blink (text_view);
3589     }
3590
3591   g_signal_connect (gdk_keymap_get_default (),
3592                     "direction_changed",
3593                     G_CALLBACK (keymap_direction_changed), text_view);
3594   gtk_text_view_check_keymap_direction (text_view);
3595
3596   text_view->need_im_reset = TRUE;
3597   gtk_im_context_focus_in (GTK_TEXT_VIEW (widget)->im_context);
3598
3599   return FALSE;
3600 }
3601
3602 static gint
3603 gtk_text_view_focus_out_event (GtkWidget *widget, GdkEventFocus *event)
3604 {
3605   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3606
3607   GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3608   gtk_widget_queue_draw (widget);
3609
3610   DV(g_print (G_STRLOC": focus_out_event\n"));
3611
3612   if (text_view->cursor_visible && text_view->layout)
3613     {
3614       gtk_text_layout_set_cursor_visible (text_view->layout, FALSE);
3615       gtk_text_view_check_cursor_blink (text_view);
3616     }
3617
3618   g_signal_handlers_disconnect_by_func (gdk_keymap_get_default (),
3619                                         keymap_direction_changed,
3620                                         text_view);
3621
3622   text_view->need_im_reset = TRUE;
3623   gtk_im_context_focus_out (GTK_TEXT_VIEW (widget)->im_context);
3624
3625   return FALSE;
3626 }
3627
3628 static gint
3629 gtk_text_view_motion_event (GtkWidget *widget, GdkEventMotion *event)
3630 {
3631   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3632
3633   if (event->window == text_view->text_window->bin_window &&
3634       text_view->drag_start_x >= 0)
3635     {
3636       gint x, y;
3637
3638       gdk_window_get_pointer (text_view->text_window->bin_window,
3639                               &x, &y, NULL);
3640
3641       if (gtk_drag_check_threshold (widget,
3642                                     text_view->drag_start_x,
3643                                     text_view->drag_start_y,
3644                                     x, y))
3645         {
3646           GtkTextIter iter;
3647           gint buffer_x, buffer_y;
3648
3649           gtk_text_view_window_to_buffer_coords (text_view,
3650                                                  GTK_TEXT_WINDOW_TEXT,
3651                                                  text_view->drag_start_x,
3652                                                  text_view->drag_start_y,
3653                                                  &buffer_x,
3654                                                  &buffer_y);
3655
3656           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3657                                              &iter,
3658                                              buffer_x, buffer_y);
3659
3660           gtk_text_view_start_selection_dnd (text_view, &iter, event);
3661           return TRUE;
3662         }
3663     }
3664
3665   return FALSE;
3666 }
3667
3668 static void
3669 gtk_text_view_paint (GtkWidget      *widget,
3670                      GdkRectangle   *area,
3671                      GdkEventExpose *event)
3672 {
3673   GtkTextView *text_view;
3674   GList *child_exposes;
3675   GList *tmp_list;
3676
3677   text_view = GTK_TEXT_VIEW (widget);
3678
3679   g_return_if_fail (text_view->layout != NULL);
3680   g_return_if_fail (text_view->xoffset >= 0);
3681   g_return_if_fail (text_view->yoffset >= 0);
3682
3683   DV (g_print (G_STRLOC": first_validate_idle: %d\n",
3684                text_view->first_validate_idle));
3685
3686   if (!text_view->onscreen_validated)
3687     {
3688       G_BREAKPOINT ();
3689       g_warning (G_STRLOC ": somehow some text lines were modified or scrolling occurred since the last validation of lines on the screen");
3690     }
3691
3692 #if 0
3693   printf ("painting %d,%d  %d x %d\n",
3694           area->x, area->y,
3695           area->width, area->height);
3696 #endif
3697
3698   child_exposes = NULL;
3699   gtk_text_layout_draw (text_view->layout,
3700                         widget,
3701                         text_view->text_window->bin_window,
3702                         text_view->cursor_gc,
3703                         text_view->xoffset,
3704                         text_view->yoffset,
3705                         area->x, area->y,
3706                         area->width, area->height,
3707                         &child_exposes);
3708
3709   tmp_list = child_exposes;
3710   while (tmp_list != NULL)
3711     {
3712       GtkWidget *child = tmp_list->data;
3713
3714       gtk_container_propagate_expose (GTK_CONTAINER (text_view),
3715                                       child,
3716                                       event);
3717
3718       g_object_unref (G_OBJECT (child));
3719
3720       tmp_list = tmp_list->next;
3721     }
3722
3723   g_list_free (child_exposes);
3724 }
3725
3726 static gint
3727 gtk_text_view_expose_event (GtkWidget *widget, GdkEventExpose *event)
3728 {
3729   if (event->window == gtk_text_view_get_window (GTK_TEXT_VIEW (widget),
3730                                                  GTK_TEXT_WINDOW_TEXT))
3731     {
3732       DV(g_print (">Exposed ("G_STRLOC")\n"));
3733       gtk_text_view_paint (widget, &event->area, event);
3734     }
3735
3736   if (event->window == widget->window)
3737     gtk_text_view_draw_focus (widget);
3738
3739   return TRUE;
3740 }
3741
3742 static void
3743 gtk_text_view_draw_focus (GtkWidget *widget)
3744 {
3745   gboolean interior_focus;
3746
3747   /* We clear the focus if we are in interior focus mode. */
3748   gtk_widget_style_get (widget, "interior_focus", &interior_focus, NULL);
3749
3750   if (GTK_WIDGET_DRAWABLE (widget))
3751     {
3752       if (GTK_WIDGET_HAS_FOCUS (widget) && !interior_focus)
3753         {
3754           gtk_paint_focus (widget->style, widget->window,
3755                            NULL, widget, "textview",
3756                            0, 0,
3757                            widget->allocation.width - 1,
3758                            widget->allocation.height - 1);
3759         }
3760       else
3761         {
3762           gdk_window_clear (widget->window);
3763         }
3764     }
3765 }
3766
3767 static void
3768 gtk_text_view_grab_focus (GtkWidget *widget)
3769 {
3770   GtkTextView *text_view;
3771
3772   text_view = GTK_TEXT_VIEW (widget);
3773
3774   GTK_WIDGET_CLASS (parent_class)->grab_focus (widget);
3775
3776   if (!text_view->disable_scroll_on_focus)
3777     gtk_text_view_scroll_mark_onscreen (text_view,
3778                                         gtk_text_buffer_get_mark (get_buffer (text_view),
3779                                                                   "insert"));
3780 }
3781
3782 /*
3783  * Container
3784  */
3785
3786 static void
3787 gtk_text_view_add (GtkContainer *container,
3788                    GtkWidget    *child)
3789 {
3790   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
3791   g_return_if_fail (GTK_IS_WIDGET (child));
3792
3793   /* This is pretty random. */
3794   gtk_text_view_add_child_in_window (GTK_TEXT_VIEW (container),
3795                                      child,
3796                                      GTK_TEXT_WINDOW_WIDGET,
3797                                      0, 0);
3798 }
3799
3800 static void
3801 gtk_text_view_remove (GtkContainer *container,
3802                       GtkWidget    *child)
3803 {
3804   GSList *iter;
3805   GtkTextView *text_view;
3806   GtkTextViewChild *vc;
3807
3808   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
3809   g_return_if_fail (GTK_IS_WIDGET (child));
3810   g_return_if_fail (child->parent == (GtkWidget*) container);
3811
3812   text_view = GTK_TEXT_VIEW (container);
3813
3814   vc = NULL;
3815   iter = text_view->children;
3816
3817   while (iter != NULL)
3818     {
3819       vc = iter->data;
3820
3821       if (vc->widget == child)
3822         break;
3823
3824       iter = g_slist_next (iter);
3825     }
3826
3827   g_assert (iter != NULL); /* be sure we had the child in the list */
3828
3829   text_view->children = g_slist_remove (text_view->children, vc);
3830
3831   gtk_widget_unparent (vc->widget);
3832
3833   text_view_child_free (vc);
3834 }
3835
3836 static void
3837 gtk_text_view_forall (GtkContainer *container,
3838                       gboolean      include_internals,
3839                       GtkCallback   callback,
3840                       gpointer      callback_data)
3841 {
3842   GSList *iter;
3843   GtkTextView *text_view;
3844
3845   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
3846   g_return_if_fail (callback != NULL);
3847
3848   text_view = GTK_TEXT_VIEW (container);
3849
3850   iter = text_view->children;
3851
3852   while (iter != NULL)
3853     {
3854       GtkTextViewChild *vc = iter->data;
3855
3856       (* callback) (vc->widget, callback_data);
3857
3858       iter = g_slist_next (iter);
3859     }
3860 }
3861
3862 #define CURSOR_ON_MULTIPLIER 0.66
3863 #define CURSOR_OFF_MULTIPLIER 0.34
3864 #define CURSOR_PEND_MULTIPLIER 1.0
3865
3866 static gboolean
3867 cursor_blinks (GtkTextView *text_view)
3868 {
3869   GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
3870   gboolean blink;
3871
3872 #ifdef DEBUG_VALIDATION_AND_SCROLLING
3873   return FALSE;
3874 #endif
3875   if (gtk_debug_flags & GTK_DEBUG_UPDATES)
3876     return FALSE;
3877
3878   g_object_get (G_OBJECT (settings), "gtk-cursor-blink", &blink, NULL);
3879   return blink;
3880 }
3881
3882 static gint
3883 get_cursor_time (GtkTextView *text_view)
3884 {
3885   GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
3886   gint time;
3887
3888   g_object_get (G_OBJECT (settings), "gtk-cursor-blink-time", &time, NULL);
3889
3890   return time;
3891 }
3892
3893 /*
3894  * Blink!
3895  */
3896
3897 static gint
3898 blink_cb (gpointer data)
3899 {
3900   GtkTextView *text_view;
3901   gboolean visible;
3902
3903   GDK_THREADS_ENTER ();
3904
3905   text_view = GTK_TEXT_VIEW (data);
3906
3907   g_assert (text_view->layout);
3908   g_assert (GTK_WIDGET_HAS_FOCUS (text_view));
3909   g_assert (text_view->cursor_visible);
3910
3911   visible = gtk_text_layout_get_cursor_visible (text_view->layout);
3912
3913   if (visible)
3914     text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_OFF_MULTIPLIER,
3915                                                 blink_cb,
3916                                                 text_view);
3917   else
3918     text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_ON_MULTIPLIER,
3919                                                 blink_cb,
3920                                                 text_view);
3921
3922   gtk_text_layout_set_cursor_visible (text_view->layout,
3923                                       !visible);
3924
3925   GDK_THREADS_LEAVE ();
3926
3927   /* Remove ourselves */
3928   return FALSE;
3929 }
3930
3931
3932 static void
3933 gtk_text_view_stop_cursor_blink (GtkTextView *text_view)
3934 {
3935   if (text_view->blink_timeout)
3936     {
3937       gtk_timeout_remove (text_view->blink_timeout);
3938       text_view->blink_timeout = 0;
3939     }
3940 }
3941
3942 static void
3943 gtk_text_view_check_cursor_blink (GtkTextView *text_view)
3944 {
3945   if (text_view->layout != NULL &&
3946       text_view->cursor_visible &&
3947       GTK_WIDGET_HAS_FOCUS (text_view))
3948     {
3949       if (cursor_blinks (text_view))
3950         {
3951           if (text_view->blink_timeout == 0)
3952             {
3953               gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3954
3955               text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_OFF_MULTIPLIER,
3956                                                           blink_cb,
3957                                                           text_view);
3958             }
3959         }
3960       else
3961         gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3962     }
3963   else
3964     {
3965       gtk_text_view_stop_cursor_blink (text_view);
3966     }
3967 }
3968
3969 static void
3970 gtk_text_view_pend_cursor_blink(GtkTextView *text_view)
3971 {
3972   if (text_view->layout != NULL &&
3973       text_view->cursor_visible &&
3974       GTK_WIDGET_HAS_FOCUS (text_view) &&
3975       cursor_blinks (text_view))
3976     {
3977       if (text_view->blink_timeout != 0)
3978         {
3979           gtk_timeout_remove (text_view->blink_timeout);
3980           text_view->blink_timeout = 0;
3981         }
3982
3983       gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3984
3985       text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_PEND_MULTIPLIER,
3986                                                   blink_cb,
3987                                                   text_view);
3988     }
3989 }
3990
3991
3992 /*
3993  * Key binding handlers
3994  */
3995
3996 static void
3997 gtk_text_view_move_iter_by_lines (GtkTextView *text_view,
3998                                   GtkTextIter *newplace,
3999                                   gint         count)
4000 {
4001   while (count < 0)
4002     {
4003       gtk_text_layout_move_iter_to_previous_line (text_view->layout, newplace);
4004       count++;
4005     }
4006
4007   while (count > 0)
4008     {
4009       gtk_text_layout_move_iter_to_next_line (text_view->layout, newplace);
4010       count--;
4011     }
4012 }
4013
4014 static void
4015 gtk_text_view_move_cursor (GtkTextView     *text_view,
4016                            GtkMovementStep  step,
4017                            gint             count,
4018                            gboolean         extend_selection)
4019 {
4020   GtkTextIter insert;
4021   GtkTextIter newplace;
4022
4023   gint cursor_x_pos = 0;
4024
4025   gtk_text_view_reset_im_context (text_view);
4026
4027   if (step == GTK_MOVEMENT_PAGES)
4028     {
4029       gtk_text_view_scroll_pages (text_view, count);
4030       gtk_text_view_pend_cursor_blink (text_view);
4031       return;
4032     }
4033
4034   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
4035                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4036                                                               "insert"));
4037   newplace = insert;
4038
4039   if (step == GTK_MOVEMENT_DISPLAY_LINES)
4040     gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, NULL);
4041
4042   switch (step)
4043     {
4044     case GTK_MOVEMENT_LOGICAL_POSITIONS:
4045       gtk_text_iter_forward_cursor_positions (&newplace, count);
4046       break;
4047
4048     case GTK_MOVEMENT_VISUAL_POSITIONS:
4049       gtk_text_layout_move_iter_visually (text_view->layout,
4050                                           &newplace, count);
4051       break;
4052
4053     case GTK_MOVEMENT_WORDS:
4054       if (count < 0)
4055         gtk_text_iter_backward_word_starts (&newplace, -count);
4056       else if (count > 0)
4057         gtk_text_iter_forward_word_ends (&newplace, count);
4058       break;
4059
4060     case GTK_MOVEMENT_DISPLAY_LINES:
4061       gtk_text_view_move_iter_by_lines (text_view, &newplace, count);
4062       gtk_text_layout_move_iter_to_x (text_view->layout, &newplace, cursor_x_pos);
4063       break;
4064
4065     case GTK_MOVEMENT_DISPLAY_LINE_ENDS:
4066       if (count > 1)
4067         gtk_text_view_move_iter_by_lines (text_view, &newplace, --count);
4068       else if (count < -1)
4069         gtk_text_view_move_iter_by_lines (text_view, &newplace, ++count);
4070
4071       if (count != 0)
4072         gtk_text_layout_move_iter_to_line_end (text_view->layout, &newplace, count);
4073       break;
4074
4075     case GTK_MOVEMENT_PARAGRAPHS:
4076       gtk_text_iter_forward_lines (&newplace, count);
4077       gtk_text_iter_set_line_offset (&newplace, 0);
4078       break;
4079
4080     case GTK_MOVEMENT_PARAGRAPH_ENDS:
4081       if (count > 0)
4082         gtk_text_iter_forward_to_line_end (&newplace);
4083       else if (count < 0)
4084         gtk_text_iter_set_line_offset (&newplace, 0);
4085       break;
4086
4087     case GTK_MOVEMENT_BUFFER_ENDS:
4088       if (count > 0)
4089         gtk_text_buffer_get_end_iter (get_buffer (text_view), &newplace);
4090       else if (count < 0)
4091         gtk_text_buffer_get_iter_at_offset (get_buffer (text_view), &newplace, 0);
4092       break;
4093
4094     default:
4095       break;
4096     }
4097
4098   if (!gtk_text_iter_equal (&insert, &newplace))
4099     {
4100       if (extend_selection)
4101         gtk_text_buffer_move_mark (get_buffer (text_view),
4102                                    gtk_text_buffer_get_mark (get_buffer (text_view),
4103                                                              "insert"),
4104                                    &newplace);
4105       else
4106         gtk_text_buffer_place_cursor (get_buffer (text_view), &newplace);
4107
4108       DV(g_print (G_STRLOC": scrolling onscreen\n"));
4109       gtk_text_view_scroll_mark_onscreen (text_view,
4110                                           gtk_text_buffer_get_mark (get_buffer (text_view),
4111                                                                     "insert"));
4112
4113       if (step == GTK_MOVEMENT_DISPLAY_LINES)
4114         {
4115           gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, -1);
4116         }
4117     }
4118
4119   gtk_text_view_pend_cursor_blink (text_view);
4120 }
4121
4122 static void
4123 gtk_text_view_set_anchor (GtkTextView *text_view)
4124 {
4125   GtkTextIter insert;
4126
4127   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
4128                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4129                                                               "insert"));
4130
4131   gtk_text_buffer_create_mark (get_buffer (text_view), "anchor", &insert, TRUE);
4132 }
4133
4134 static void
4135 gtk_text_view_scroll_pages (GtkTextView *text_view,
4136                             gint         count)
4137 {
4138   gdouble newval;
4139   GtkAdjustment *adj;
4140   gint cursor_x_pos, cursor_y_pos;
4141   GtkTextIter new_insert;
4142   GtkTextIter anchor;
4143   gint y0, y1;
4144
4145   g_return_if_fail (text_view->vadjustment != NULL);
4146
4147   adj = text_view->vadjustment;
4148
4149   /* Validate the region that will be brought into view by the cursor motion
4150    */
4151   if (count < 0)
4152     {
4153       gtk_text_view_get_first_para_iter (text_view, &anchor);
4154       y0 = adj->page_size;
4155       y1 = adj->page_size + count * adj->page_increment;
4156     }
4157   else
4158     {
4159       gtk_text_view_get_first_para_iter (text_view, &anchor);
4160       y0 = count * adj->page_increment + adj->page_size;
4161       y1 = 0;
4162     }
4163
4164   gtk_text_layout_validate_yrange (text_view->layout, &anchor, y0, y1);
4165   /* FIXME do we need to update the adjustment ranges here? */
4166
4167   gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, &cursor_y_pos);
4168
4169   newval = adj->value;
4170
4171   newval += count * adj->page_increment;
4172
4173   cursor_y_pos += newval - adj->value;
4174   set_adjustment_clamped (adj, newval);
4175
4176   gtk_text_layout_get_iter_at_pixel (text_view->layout, &new_insert, cursor_x_pos, cursor_y_pos);
4177   clamp_iter_onscreen (text_view, &new_insert);
4178   gtk_text_buffer_place_cursor (get_buffer (text_view), &new_insert);
4179
4180   gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, cursor_y_pos);
4181
4182   /* Adjust to have the cursor _entirely_ onscreen, move_mark_onscreen
4183    * only guarantees 1 pixel onscreen.
4184    */
4185   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4186   gtk_text_view_scroll_mark_onscreen (text_view,
4187                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4188                                                                 "insert"));
4189 }
4190
4191 static gboolean
4192 whitespace (gunichar ch, gpointer user_data)
4193 {
4194   return (ch == ' ' || ch == '\t');
4195 }
4196
4197 static gboolean
4198 not_whitespace (gunichar ch, gpointer user_data)
4199 {
4200   return !whitespace (ch, user_data);
4201 }
4202
4203 static gboolean
4204 find_whitepace_region (const GtkTextIter *center,
4205                        GtkTextIter *start, GtkTextIter *end)
4206 {
4207   *start = *center;
4208   *end = *center;
4209
4210   if (gtk_text_iter_backward_find_char (start, not_whitespace, NULL, NULL))
4211     gtk_text_iter_forward_char (start); /* we want the first whitespace... */
4212   if (whitespace (gtk_text_iter_get_char (end), NULL))
4213     gtk_text_iter_forward_find_char (end, not_whitespace, NULL, NULL);
4214
4215   return !gtk_text_iter_equal (start, end);
4216 }
4217
4218 static void
4219 gtk_text_view_insert_at_cursor (GtkTextView *text_view,
4220                                 const gchar *str)
4221 {
4222   gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
4223                                                 text_view->editable);
4224 }
4225
4226 static void
4227 gtk_text_view_delete_from_cursor (GtkTextView   *text_view,
4228                                   GtkDeleteType  type,
4229                                   gint           count)
4230 {
4231   GtkTextIter insert;
4232   GtkTextIter start;
4233   GtkTextIter end;
4234   gboolean leave_one = FALSE;
4235
4236   gtk_text_view_reset_im_context (text_view);
4237
4238   if (type == GTK_DELETE_CHARS)
4239     {
4240       /* Char delete deletes the selection, if one exists */
4241       if (gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
4242                                             text_view->editable))
4243         return;
4244     }
4245
4246   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4247                                     &insert,
4248                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4249                                                               "insert"));
4250
4251   start = insert;
4252   end = insert;
4253
4254   switch (type)
4255     {
4256     case GTK_DELETE_CHARS:
4257       gtk_text_iter_forward_cursor_positions (&end, count);
4258       break;
4259
4260     case GTK_DELETE_WORD_ENDS:
4261       if (count > 0)
4262         gtk_text_iter_forward_word_ends (&end, count);
4263       else if (count < 0)
4264         gtk_text_iter_backward_word_starts (&start, 0 - count);
4265       break;
4266
4267     case GTK_DELETE_WORDS:
4268       break;
4269
4270     case GTK_DELETE_DISPLAY_LINE_ENDS:
4271       break;
4272
4273     case GTK_DELETE_DISPLAY_LINES:
4274       break;
4275
4276     case GTK_DELETE_PARAGRAPH_ENDS:
4277       /* If we're already at a newline, we need to
4278        * simply delete that newline, instead of
4279        * moving to the next one.
4280        */
4281       if (gtk_text_iter_ends_line (&end))
4282         {
4283           gtk_text_iter_forward_line (&end);
4284           --count;
4285         }
4286
4287       while (count > 0)
4288         {
4289           if (!gtk_text_iter_forward_to_line_end (&end))
4290             break;
4291
4292           --count;
4293         }
4294
4295       /* FIXME figure out what a negative count means
4296          and support that */
4297       break;
4298
4299     case GTK_DELETE_PARAGRAPHS:
4300       if (count > 0)
4301         {
4302           gtk_text_iter_set_line_offset (&start, 0);
4303           gtk_text_iter_forward_to_line_end (&end);
4304
4305           /* Do the lines beyond the first. */
4306           while (count > 1)
4307             {
4308               gtk_text_iter_forward_to_line_end (&end);
4309
4310               --count;
4311             }
4312         }
4313
4314       /* FIXME negative count? */
4315
4316       break;
4317
4318     case GTK_DELETE_WHITESPACE:
4319       {
4320         find_whitepace_region (&insert, &start, &end);
4321       }
4322       break;
4323
4324     default:
4325       break;
4326     }
4327
4328   if (!gtk_text_iter_equal (&start, &end))
4329     {
4330       gtk_text_buffer_begin_user_action (get_buffer (text_view));
4331
4332       if (gtk_text_buffer_delete_interactive (get_buffer (text_view), &start, &end,
4333                                               text_view->editable))
4334         {
4335           if (leave_one)
4336             gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view),
4337                                                           " ", 1,
4338                                                           text_view->editable);
4339         }
4340
4341       gtk_text_buffer_end_user_action (get_buffer (text_view));
4342
4343       DV(g_print (G_STRLOC": scrolling onscreen\n"));
4344       gtk_text_view_scroll_mark_onscreen (text_view,
4345                                           gtk_text_buffer_get_mark (get_buffer (text_view), "insert"));
4346     }
4347 }
4348
4349 static void
4350 gtk_text_view_cut_clipboard (GtkTextView *text_view)
4351 {
4352   gtk_text_buffer_cut_clipboard (get_buffer (text_view),
4353                                  gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
4354                                  text_view->editable);
4355   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4356   gtk_text_view_scroll_mark_onscreen (text_view,
4357                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4358                                                                 "insert"));
4359 }
4360
4361 static void
4362 gtk_text_view_copy_clipboard (GtkTextView *text_view)
4363 {
4364   gtk_text_buffer_copy_clipboard (get_buffer (text_view),
4365                                   gtk_clipboard_get (GDK_SELECTION_CLIPBOARD));
4366   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4367   gtk_text_view_scroll_mark_onscreen (text_view,
4368                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4369                                                                 "insert"));
4370 }
4371
4372 static void
4373 gtk_text_view_paste_clipboard (GtkTextView *text_view)
4374 {
4375   gtk_text_buffer_paste_clipboard (get_buffer (text_view),
4376                                    gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
4377                                    NULL,
4378                                    text_view->editable);
4379   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4380   gtk_text_view_scroll_mark_onscreen (text_view,
4381                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4382                                                                 "insert"));
4383 }
4384
4385 static void
4386 gtk_text_view_toggle_overwrite (GtkTextView *text_view)
4387 {
4388   text_view->overwrite_mode = !text_view->overwrite_mode;
4389 }
4390
4391 /*
4392  * Selections
4393  */
4394
4395 static void
4396 gtk_text_view_unselect (GtkTextView *text_view)
4397 {
4398   GtkTextIter insert;
4399
4400   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4401                                     &insert,
4402                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4403                                                               "insert"));
4404
4405   gtk_text_buffer_move_mark (get_buffer (text_view),
4406                              gtk_text_buffer_get_mark (get_buffer (text_view),
4407                                                        "selection_bound"),
4408                              &insert);
4409 }
4410
4411 static void
4412 move_mark_to_pointer_and_scroll (GtkTextView *text_view,
4413                                  const gchar *mark_name)
4414 {
4415   gint x, y;
4416   GdkModifierType state;
4417   GtkTextIter newplace;
4418
4419   /*   DV(g_print (G_STRLOC": begin\n")); */
4420
4421   gdk_window_get_pointer (text_view->text_window->bin_window,
4422                           &x, &y, &state);
4423
4424   /*   DV(g_print (G_STRLOC": get iter at pixel\n"); */
4425   gtk_text_layout_get_iter_at_pixel (text_view->layout,
4426                                      &newplace,
4427                                      x + text_view->xoffset,
4428                                      y + text_view->yoffset);
4429
4430   {
4431     GtkTextMark *mark =
4432       gtk_text_buffer_get_mark (get_buffer (text_view), mark_name);
4433
4434     DV(g_print (G_STRLOC": move mark\n"));
4435     gtk_text_buffer_move_mark (get_buffer (text_view),
4436                                mark,
4437                                &newplace);
4438
4439     DV(g_print (G_STRLOC": scrolling onscreen\n"));
4440     gtk_text_view_scroll_mark_onscreen (text_view, mark);
4441   }
4442 }
4443
4444 static gint
4445 selection_scan_timeout (gpointer data)
4446 {
4447   GtkTextView *text_view;
4448
4449   GDK_THREADS_ENTER ();
4450
4451   text_view = GTK_TEXT_VIEW (data);
4452
4453   DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
4454   move_mark_to_pointer_and_scroll (text_view, "insert");
4455
4456   GDK_THREADS_LEAVE ();
4457
4458   return TRUE; /* remain installed. */
4459 }
4460
4461 #define DND_SCROLL_MARGIN 0.20
4462
4463 static gint
4464 drag_scan_timeout (gpointer data)
4465 {
4466   GtkTextView *text_view;
4467   gint x, y;
4468   GdkModifierType state;
4469   GtkTextIter newplace;
4470
4471   GDK_THREADS_ENTER ();
4472
4473   text_view = GTK_TEXT_VIEW (data);
4474
4475   gdk_window_get_pointer (text_view->text_window->bin_window,
4476                           &x, &y, &state);
4477
4478   gtk_text_layout_get_iter_at_pixel (text_view->layout,
4479                                      &newplace,
4480                                      x + text_view->xoffset,
4481                                      y + text_view->yoffset);
4482
4483   gtk_text_buffer_move_mark (get_buffer (text_view),
4484                              text_view->dnd_mark,
4485                              &newplace);
4486
4487   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4488   gtk_text_view_scroll_to_mark (text_view,
4489                                 text_view->dnd_mark,
4490                                 DND_SCROLL_MARGIN, FALSE, 0.0, 0.0);
4491
4492   GDK_THREADS_LEAVE ();
4493
4494   return TRUE;
4495 }
4496
4497 static gint
4498 selection_motion_event_handler (GtkTextView *text_view, GdkEventMotion *event, gpointer data)
4499 {
4500   DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
4501   move_mark_to_pointer_and_scroll (text_view, "insert");
4502
4503   /* If we had to scroll offscreen, insert a timeout to do so
4504    * again. Note that in the timeout, even if the mouse doesn't
4505    * move, due to this scroll xoffset/yoffset will have changed
4506    * and we'll need to scroll again.
4507    */
4508   if (text_view->scroll_timeout != 0) /* reset on every motion event */
4509     gtk_timeout_remove (text_view->scroll_timeout);
4510
4511   text_view->scroll_timeout =
4512     gtk_timeout_add (50, selection_scan_timeout, text_view);
4513
4514   return TRUE;
4515 }
4516
4517 static void
4518 gtk_text_view_start_selection_drag (GtkTextView       *text_view,
4519                                     const GtkTextIter *iter,
4520                                     GdkEventButton    *button)
4521 {
4522   GtkTextIter newplace;
4523
4524   g_return_if_fail (text_view->selection_drag_handler == 0);
4525
4526   gtk_grab_add (GTK_WIDGET (text_view));
4527
4528   newplace = *iter;
4529
4530   gtk_text_buffer_place_cursor (get_buffer (text_view), &newplace);
4531
4532   text_view->selection_drag_handler = gtk_signal_connect (GTK_OBJECT (text_view),
4533                                                           "motion_notify_event",
4534                                                           GTK_SIGNAL_FUNC (selection_motion_event_handler),
4535                                                           NULL);
4536 }
4537
4538 /* returns whether we were really dragging */
4539 static gboolean
4540 gtk_text_view_end_selection_drag (GtkTextView *text_view, GdkEventButton *event)
4541 {
4542   if (text_view->selection_drag_handler == 0)
4543     return FALSE;
4544
4545   gtk_signal_disconnect (GTK_OBJECT (text_view), text_view->selection_drag_handler);
4546   text_view->selection_drag_handler = 0;
4547
4548   if (text_view->scroll_timeout != 0)
4549     {
4550       gtk_timeout_remove (text_view->scroll_timeout);
4551       text_view->scroll_timeout = 0;
4552     }
4553
4554   /* one last update to current position */
4555   DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
4556   move_mark_to_pointer_and_scroll (text_view, "insert");
4557
4558   gtk_grab_remove (GTK_WIDGET (text_view));
4559
4560   return TRUE;
4561 }
4562
4563 /*
4564  * Layout utils
4565  */
4566
4567 static void
4568 gtk_text_view_set_attributes_from_style (GtkTextView        *text_view,
4569                                          GtkTextAttributes  *values,
4570                                          GtkStyle           *style)
4571 {
4572   values->appearance.bg_color = style->base[GTK_STATE_NORMAL];
4573   values->appearance.fg_color = style->text[GTK_STATE_NORMAL];
4574
4575   if (values->font)
4576     pango_font_description_free (values->font);
4577
4578   values->font = pango_font_description_copy (style->font_desc);
4579 }
4580
4581 static void
4582 gtk_text_view_check_keymap_direction (GtkTextView *text_view)
4583 {
4584   if (text_view->layout)
4585     {
4586       gboolean split_cursor;
4587       GtkTextDirection new_dir;
4588       GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
4589
4590       g_object_get (G_OBJECT (settings),
4591                     "gtk-split-cursor", &split_cursor,
4592                     NULL);
4593       if (split_cursor)
4594         new_dir = GTK_TEXT_DIR_NONE;
4595       else
4596         new_dir = (gdk_keymap_get_direction (gdk_keymap_get_default ()) == PANGO_DIRECTION_LTR) ?
4597           GTK_TEXT_DIR_LTR : GTK_TEXT_DIR_RTL;
4598
4599       if (text_view->layout->cursor_direction != new_dir)
4600         gtk_text_layout_set_cursor_direction (text_view->layout, new_dir);
4601     }
4602 }
4603
4604 static void
4605 gtk_text_view_ensure_layout (GtkTextView *text_view)
4606 {
4607   GtkWidget *widget;
4608
4609   widget = GTK_WIDGET (text_view);
4610
4611   if (text_view->layout == NULL)
4612     {
4613       GtkTextAttributes *style;
4614       PangoContext *ltr_context, *rtl_context;
4615       GSList *tmp_list;
4616
4617       DV(g_print(G_STRLOC"\n"));
4618
4619       text_view->layout = gtk_text_layout_new ();
4620
4621       g_signal_connect (G_OBJECT (text_view->layout),
4622                         "invalidated",
4623                         G_CALLBACK (invalidated_handler),
4624                         text_view);
4625
4626       g_signal_connect (G_OBJECT (text_view->layout),
4627                         "changed",
4628                         G_CALLBACK (changed_handler),
4629                         text_view);
4630
4631       g_signal_connect (G_OBJECT (text_view->layout),
4632                         "allocate_child",
4633                         G_CALLBACK (gtk_text_view_child_allocated),
4634                         text_view);
4635
4636       if (get_buffer (text_view))
4637         gtk_text_layout_set_buffer (text_view->layout, get_buffer (text_view));
4638
4639       if ((GTK_WIDGET_HAS_FOCUS (text_view) && text_view->cursor_visible))
4640         gtk_text_view_pend_cursor_blink (text_view);
4641       else
4642         gtk_text_layout_set_cursor_visible (text_view->layout, FALSE);
4643
4644       ltr_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
4645       pango_context_set_base_dir (ltr_context, PANGO_DIRECTION_LTR);
4646       rtl_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
4647       pango_context_set_base_dir (rtl_context, PANGO_DIRECTION_RTL);
4648
4649       gtk_text_layout_set_contexts (text_view->layout, ltr_context, rtl_context);
4650
4651       g_object_unref (G_OBJECT (ltr_context));
4652       g_object_unref (G_OBJECT (rtl_context));
4653
4654       gtk_text_view_check_keymap_direction (text_view);
4655
4656       style = gtk_text_attributes_new ();
4657
4658       gtk_widget_ensure_style (widget);
4659       gtk_text_view_set_attributes_from_style (text_view,
4660                                                style, widget->style);
4661
4662       style->pixels_above_lines = text_view->pixels_above_lines;
4663       style->pixels_below_lines = text_view->pixels_below_lines;
4664       style->pixels_inside_wrap = text_view->pixels_inside_wrap;
4665       style->left_margin = text_view->left_margin;
4666       style->right_margin = text_view->right_margin;
4667       style->indent = text_view->indent;
4668       style->tabs = text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
4669
4670       style->wrap_mode = text_view->wrap_mode;
4671       style->justification = text_view->justify;
4672       style->direction = gtk_widget_get_direction (GTK_WIDGET (text_view));
4673
4674       gtk_text_layout_set_default_style (text_view->layout, style);
4675
4676       gtk_text_attributes_unref (style);
4677
4678       /* Set layout for all anchored children */
4679
4680       tmp_list = text_view->children;
4681       while (tmp_list != NULL)
4682         {
4683           GtkTextViewChild *vc = tmp_list->data;
4684
4685           if (vc->anchor)
4686             {
4687               gtk_text_anchored_child_set_layout (vc->widget,
4688                                                   text_view->layout);
4689               /* vc may now be invalid! */
4690             }
4691
4692           tmp_list = g_slist_next (tmp_list);
4693         }
4694     }
4695 }
4696
4697 /**
4698  * gtk_text_view_get_default_attributes:
4699  * @text_view: a #GtkTextView
4700  *
4701  * Obtains a copy of the default text attributes. These are the
4702  * attributes used for text unless a tag overrides them.
4703  * You'd typically pass the default attributes in to
4704  * gtk_text_tag_get_attributes() in order to get the
4705  * attributes in effect at a given text position.
4706  *
4707  * The return value is a copy owned by the caller of this function,
4708  * and should be freed.
4709  *
4710  * Return value: a new #GtkTextAttributes
4711  **/
4712 GtkTextAttributes*
4713 gtk_text_view_get_default_attributes (GtkTextView *text_view)
4714 {
4715   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
4716
4717   gtk_text_view_ensure_layout (text_view);
4718
4719   return gtk_text_attributes_copy (text_view->layout->default_style);
4720 }
4721
4722 static void
4723 gtk_text_view_destroy_layout (GtkTextView *text_view)
4724 {
4725   if (text_view->layout)
4726     {
4727       GSList *tmp_list;
4728
4729       gtk_text_view_remove_validate_idles (text_view);
4730
4731       /* Remove layout from all anchored children */
4732       tmp_list = text_view->children;
4733       while (tmp_list != NULL)
4734         {
4735           GtkTextViewChild *vc = tmp_list->data;
4736
4737           if (vc->anchor)
4738             {
4739               gtk_text_anchored_child_set_layout (vc->widget, NULL);
4740               /* vc may now be invalid! */
4741             }
4742
4743           tmp_list = g_slist_next (tmp_list);
4744         }
4745
4746       gtk_text_view_stop_cursor_blink (text_view);
4747       gtk_text_view_end_selection_drag (text_view, NULL);
4748
4749       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->layout),
4750                                             invalidated_handler, text_view);
4751       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->layout),
4752                                             changed_handler, text_view);
4753       g_object_unref (G_OBJECT (text_view->layout));
4754       text_view->layout = NULL;
4755     }
4756 }
4757
4758 static void
4759 gtk_text_view_reset_im_context (GtkTextView *text_view)
4760 {
4761   if (text_view->need_im_reset)
4762     {
4763       text_view->need_im_reset = FALSE;
4764       gtk_im_context_reset (text_view->im_context);
4765     }
4766 }
4767
4768 /*
4769  * DND feature
4770  */
4771
4772 static void
4773 gtk_text_view_start_selection_dnd (GtkTextView       *text_view,
4774                                    const GtkTextIter *iter,
4775                                    GdkEventMotion    *event)
4776 {
4777   GdkDragContext *context;
4778   GtkTargetList *target_list;
4779
4780   text_view->drag_start_x = -1;
4781   text_view->drag_start_y = -1;
4782   text_view->pending_place_cursor_button = 0;
4783
4784   target_list = gtk_target_list_new (target_table,
4785                                      G_N_ELEMENTS (target_table));
4786
4787   context = gtk_drag_begin (GTK_WIDGET (text_view), target_list,
4788                             GDK_ACTION_COPY | GDK_ACTION_MOVE,
4789                             1, (GdkEvent*)event);
4790
4791   gtk_target_list_unref (target_list);
4792
4793   gtk_drag_set_icon_default (context);
4794 }
4795
4796 static void
4797 gtk_text_view_drag_begin (GtkWidget        *widget,
4798                           GdkDragContext   *context)
4799 {
4800   /* do nothing */
4801 }
4802
4803 static void
4804 gtk_text_view_drag_end (GtkWidget        *widget,
4805                         GdkDragContext   *context)
4806 {
4807   GtkTextView *text_view;
4808
4809   text_view = GTK_TEXT_VIEW (widget);
4810 }
4811
4812 static void
4813 gtk_text_view_drag_data_get (GtkWidget        *widget,
4814                              GdkDragContext   *context,
4815                              GtkSelectionData *selection_data,
4816                              guint             info,
4817                              guint             time)
4818 {
4819   GtkTextView *text_view;
4820
4821   text_view = GTK_TEXT_VIEW (widget);
4822
4823   if (selection_data->target == gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE))
4824     {
4825       GtkTextBuffer *buffer = gtk_text_view_get_buffer (text_view);
4826
4827       gtk_selection_data_set (selection_data,
4828                               gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE),
4829                               8, /* bytes */
4830                               (void*)&buffer,
4831                               sizeof (buffer));
4832     }
4833   else
4834     {
4835       gchar *str;
4836       GtkTextIter start;
4837       GtkTextIter end;
4838
4839       str = NULL;
4840
4841       if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
4842                                                 &start, &end))
4843         {
4844           /* Extract the selected text */
4845           str = gtk_text_iter_get_visible_text (&start, &end);
4846         }
4847
4848       if (str)
4849         {
4850           gtk_selection_data_set_text (selection_data, str, -1);
4851           g_free (str);
4852         }
4853     }
4854 }
4855
4856 static void
4857 gtk_text_view_drag_data_delete (GtkWidget        *widget,
4858                                 GdkDragContext   *context)
4859 {
4860   GtkTextView *text_view;
4861
4862   text_view = GTK_TEXT_VIEW (widget);
4863
4864   gtk_text_buffer_delete_selection (GTK_TEXT_VIEW (widget)->buffer,
4865                                     TRUE, GTK_TEXT_VIEW (widget)->editable);
4866 }
4867
4868 static void
4869 gtk_text_view_drag_leave (GtkWidget        *widget,
4870                           GdkDragContext   *context,
4871                           guint             time)
4872 {
4873   GtkTextView *text_view;
4874
4875   text_view = GTK_TEXT_VIEW (widget);
4876
4877   gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
4878
4879   if (text_view->scroll_timeout != 0)
4880     gtk_timeout_remove (text_view->scroll_timeout);
4881
4882   text_view->scroll_timeout = 0;
4883 }
4884
4885 static gboolean
4886 gtk_text_view_drag_motion (GtkWidget        *widget,
4887                            GdkDragContext   *context,
4888                            gint              x,
4889                            gint              y,
4890                            guint             time)
4891 {
4892   GtkTextIter newplace;
4893   GtkTextView *text_view;
4894   GtkTextIter start;
4895   GtkTextIter end;
4896   GdkRectangle target_rect;
4897   gint bx, by;
4898   GdkDragAction suggested_action = 0;
4899
4900   text_view = GTK_TEXT_VIEW (widget);
4901
4902   target_rect = text_view->text_window->allocation;
4903
4904   if (x < target_rect.x ||
4905       y < target_rect.y ||
4906       x > (target_rect.x + target_rect.width) ||
4907       y > (target_rect.y + target_rect.height))
4908     return FALSE; /* outside the text window, allow parent widgets to handle event */
4909
4910   gtk_text_view_window_to_buffer_coords (text_view,
4911                                          GTK_TEXT_WINDOW_WIDGET,
4912                                          x, y,
4913                                          &bx, &by);
4914
4915   gtk_text_layout_get_iter_at_pixel (text_view->layout,
4916                                      &newplace,
4917                                      bx, by);
4918
4919   if (gtk_drag_dest_find_target (widget, context,
4920                                  gtk_drag_dest_get_target_list (widget)) == GDK_NONE)
4921     {
4922       /* can't accept any of the offered targets */
4923     }
4924   else if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
4925                                             &start, &end) &&
4926            gtk_text_iter_in_range (&newplace, &start, &end))
4927     {
4928       /* We're inside the selection. */
4929     }
4930   else
4931     {
4932       if (gtk_text_iter_can_insert (&newplace, text_view->editable))
4933         {
4934           GtkWidget *source_widget;
4935
4936           suggested_action = context->suggested_action;
4937
4938           source_widget = gtk_drag_get_source_widget (context);
4939
4940           if (source_widget == widget)
4941             {
4942               /* Default to MOVE, unless the user has
4943                * pressed ctrl or alt to affect available actions
4944                */
4945               if ((context->actions & GDK_ACTION_MOVE) != 0)
4946                 suggested_action = GDK_ACTION_MOVE;
4947             }
4948         }
4949       else
4950         {
4951           /* Can't drop here. */
4952         }
4953     }
4954
4955   if (suggested_action != 0)
4956     {
4957       gtk_text_mark_set_visible (text_view->dnd_mark,
4958                                  text_view->cursor_visible);
4959
4960       gdk_drag_status (context, suggested_action, time);
4961     }
4962   else
4963     {
4964       gdk_drag_status (context, 0, time);
4965       gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
4966     }
4967
4968   gtk_text_buffer_move_mark (get_buffer (text_view),
4969                              text_view->dnd_mark,
4970                              &newplace);
4971
4972   DV(g_print (G_STRLOC": scrolling to mark\n"));
4973   gtk_text_view_scroll_to_mark (text_view,
4974                                 text_view->dnd_mark,
4975                                 DND_SCROLL_MARGIN, FALSE, 0.0, 0.0);
4976
4977   if (text_view->scroll_timeout != 0) /* reset on every motion event */
4978     gtk_timeout_remove (text_view->scroll_timeout);
4979
4980   text_view->scroll_timeout =
4981     gtk_timeout_add (50, drag_scan_timeout, text_view);
4982
4983   /* TRUE return means don't propagate the drag motion to parent
4984    * widgets that may also be drop sites.
4985    */
4986   return TRUE;
4987 }
4988
4989 static gboolean
4990 gtk_text_view_drag_drop (GtkWidget        *widget,
4991                          GdkDragContext   *context,
4992                          gint              x,
4993                          gint              y,
4994                          guint             time)
4995 {
4996   GtkTextView *text_view;
4997   GtkTextIter drop_point;
4998   GdkAtom target = GDK_NONE;
4999
5000   text_view = GTK_TEXT_VIEW (widget);
5001
5002   if (text_view->scroll_timeout != 0)
5003     gtk_timeout_remove (text_view->scroll_timeout);
5004
5005   text_view->scroll_timeout = 0;
5006
5007   gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
5008
5009   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
5010                                     &drop_point,
5011                                     text_view->dnd_mark);
5012
5013   if (gtk_text_iter_can_insert (&drop_point, text_view->editable))
5014     target = gtk_drag_dest_find_target (widget, context, NULL);
5015
5016   if (target != GDK_NONE)
5017     gtk_drag_get_data (widget, context, target, time);
5018   else
5019     gtk_drag_finish (context, FALSE, FALSE, time);
5020
5021   return TRUE;
5022 }
5023
5024 static void
5025 insert_text_data (GtkTextView      *text_view,
5026                   GtkTextIter      *drop_point,
5027                   GtkSelectionData *selection_data)
5028 {
5029   gchar *str;
5030
5031   str = gtk_selection_data_get_text (selection_data);
5032
5033   if (str)
5034     {
5035       gtk_text_buffer_insert_interactive (get_buffer (text_view),
5036                                           drop_point, str, -1,
5037                                           text_view->editable);
5038       g_free (str);
5039     }
5040 }
5041
5042 static void
5043 gtk_text_view_drag_data_received (GtkWidget        *widget,
5044                                   GdkDragContext   *context,
5045                                   gint              x,
5046                                   gint              y,
5047                                   GtkSelectionData *selection_data,
5048                                   guint             info,
5049                                   guint             time)
5050 {
5051   GtkTextIter drop_point;
5052   GtkTextView *text_view;
5053   gboolean success = FALSE;
5054
5055   text_view = GTK_TEXT_VIEW (widget);
5056
5057   if (!text_view->dnd_mark)
5058     goto done;
5059
5060   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
5061                                     &drop_point,
5062                                     text_view->dnd_mark);
5063
5064   if (!gtk_text_iter_can_insert (&drop_point, text_view->editable))
5065     goto done;
5066
5067   if (selection_data->target == gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE))
5068     {
5069       GtkTextBuffer *src_buffer = NULL;
5070       GtkTextIter start, end;
5071       gboolean copy_tags = TRUE;
5072
5073       if (selection_data->length != sizeof (src_buffer))
5074         return;
5075
5076       memcpy (&src_buffer, selection_data->data, sizeof (src_buffer));
5077
5078       if (src_buffer == NULL)
5079         return;
5080
5081       g_return_if_fail (GTK_IS_TEXT_BUFFER (src_buffer));
5082
5083       if (gtk_text_buffer_get_tag_table (src_buffer) !=
5084           gtk_text_buffer_get_tag_table (get_buffer (text_view)))
5085         copy_tags = FALSE;
5086
5087       if (gtk_text_buffer_get_selection_bounds (src_buffer,
5088                                                 &start,
5089                                                 &end))
5090         {
5091           if (copy_tags)
5092             gtk_text_buffer_insert_range_interactive (get_buffer (text_view),
5093                                                       &drop_point,
5094                                                       &start,
5095                                                       &end,
5096                                                       text_view->editable);
5097           else
5098             {
5099               gchar *str;
5100
5101               str = gtk_text_iter_get_visible_text (&start, &end);
5102               gtk_text_buffer_insert_interactive (get_buffer (text_view),
5103                                                   &drop_point, str, -1,
5104                                                   text_view->editable);
5105               g_free (str);
5106             }
5107         }
5108     }
5109   else
5110     insert_text_data (text_view, &drop_point, selection_data);
5111
5112   success = TRUE;
5113
5114  done:
5115   gtk_drag_finish (context, success,
5116                    success && context->action == GDK_ACTION_MOVE,
5117                    time);
5118 }
5119
5120 static GtkAdjustment*
5121 get_hadjustment (GtkTextView *text_view)
5122 {
5123   if (text_view->hadjustment == NULL)
5124     gtk_text_view_set_scroll_adjustments (text_view,
5125                                           NULL, /* forces creation */
5126                                           text_view->vadjustment);
5127
5128   return text_view->hadjustment;
5129 }
5130
5131 static GtkAdjustment*
5132 get_vadjustment (GtkTextView *text_view)
5133 {
5134   if (text_view->vadjustment == NULL)
5135     gtk_text_view_set_scroll_adjustments (text_view,
5136                                           text_view->hadjustment,
5137                                           NULL); /* forces creation */
5138   return text_view->vadjustment;
5139 }
5140
5141
5142 static void
5143 gtk_text_view_set_scroll_adjustments (GtkTextView   *text_view,
5144                                       GtkAdjustment *hadj,
5145                                       GtkAdjustment *vadj)
5146 {
5147   gboolean need_adjust = FALSE;
5148
5149   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
5150
5151   if (hadj)
5152     g_return_if_fail (GTK_IS_ADJUSTMENT (hadj));
5153   else
5154     hadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
5155   if (vadj)
5156     g_return_if_fail (GTK_IS_ADJUSTMENT (vadj));
5157   else
5158     vadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
5159
5160   if (text_view->hadjustment && (text_view->hadjustment != hadj))
5161     {
5162       gtk_signal_disconnect_by_data (GTK_OBJECT (text_view->hadjustment), text_view);
5163       g_object_unref (G_OBJECT (text_view->hadjustment));
5164     }
5165
5166   if (text_view->vadjustment && (text_view->vadjustment != vadj))
5167     {
5168       gtk_signal_disconnect_by_data (GTK_OBJECT (text_view->vadjustment), text_view);
5169       g_object_unref (G_OBJECT (text_view->vadjustment));
5170     }
5171
5172   if (text_view->hadjustment != hadj)
5173     {
5174       text_view->hadjustment = hadj;
5175       g_object_ref (G_OBJECT (text_view->hadjustment));
5176       gtk_object_sink (GTK_OBJECT (text_view->hadjustment));
5177
5178       gtk_signal_connect (GTK_OBJECT (text_view->hadjustment), "value_changed",
5179                           (GtkSignalFunc) gtk_text_view_value_changed,
5180                           text_view);
5181       need_adjust = TRUE;
5182     }
5183
5184   if (text_view->vadjustment != vadj)
5185     {
5186       text_view->vadjustment = vadj;
5187       g_object_ref (G_OBJECT (text_view->vadjustment));
5188       gtk_object_sink (GTK_OBJECT (text_view->vadjustment));
5189
5190       gtk_signal_connect (GTK_OBJECT (text_view->vadjustment), "value_changed",
5191                           (GtkSignalFunc) gtk_text_view_value_changed,
5192                           text_view);
5193       need_adjust = TRUE;
5194     }
5195
5196   if (need_adjust)
5197     gtk_text_view_value_changed (NULL, text_view);
5198 }
5199
5200 static void
5201 gtk_text_view_value_changed (GtkAdjustment *adj,
5202                              GtkTextView   *text_view)
5203 {
5204   GtkTextIter iter;
5205   gint line_top;
5206   gint dx = 0;
5207   gint dy = 0;
5208
5209   /* Note that we oddly call this function with adj == NULL
5210    * sometimes
5211    */
5212
5213   text_view->onscreen_validated = FALSE;
5214
5215   DV(g_print(">Scroll offset changed %s/%g, onscreen_validated = FALSE ("G_STRLOC")\n",
5216              adj == text_view->hadjustment ? "hadj" : adj == text_view->vadjustment ? "vadj" : "none",
5217              adj ? adj->value : 0.0));
5218
5219   if (adj == text_view->hadjustment)
5220     {
5221       dx = text_view->xoffset - (gint)adj->value;
5222       text_view->xoffset = adj->value;
5223     }
5224   else if (adj == text_view->vadjustment)
5225     {
5226       dy = text_view->yoffset - (gint)adj->value;
5227       text_view->yoffset = adj->value;
5228
5229       if (text_view->layout)
5230         {
5231           gtk_text_layout_get_line_at_y (text_view->layout, &iter, adj->value, &line_top);
5232
5233           gtk_text_buffer_move_mark (get_buffer (text_view), text_view->first_para_mark, &iter);
5234
5235           text_view->first_para_pixels = adj->value - line_top;
5236         }
5237     }
5238
5239   if (dx != 0 || dy != 0)
5240     {
5241       GSList *tmp_list;
5242
5243       if (GTK_WIDGET_REALIZED (text_view))
5244         {
5245           if (dy != 0)
5246             {
5247               if (text_view->left_window)
5248                 text_window_scroll (text_view->left_window, 0, dy);
5249               if (text_view->right_window)
5250                 text_window_scroll (text_view->right_window, 0, dy);
5251             }
5252
5253           if (dx != 0)
5254             {
5255               if (text_view->top_window)
5256                 text_window_scroll (text_view->top_window, dx, 0);
5257               if (text_view->bottom_window)
5258                 text_window_scroll (text_view->bottom_window, dx, 0);
5259             }
5260
5261           /* It looks nicer to scroll the main area last, because
5262            * it takes a while, and making the side areas update
5263            * afterward emphasizes the slowness of scrolling the
5264            * main area.
5265            */
5266           text_window_scroll (text_view->text_window, dx, dy);
5267         }
5268
5269       /* Children are now "moved" in the text window, poke
5270        * into widget->allocation for each child
5271        */
5272       tmp_list = text_view->children;
5273       while (tmp_list != NULL)
5274         {
5275           GtkTextViewChild *child = tmp_list->data;
5276
5277           if (child->anchor)
5278             {
5279               child->widget->allocation.x -= dx;
5280               child->widget->allocation.y -= dy;
5281
5282 #if 0
5283               g_print ("allocation for %p tweaked to %d,%d\n",
5284                        child->widget,
5285                        child->widget->allocation.x,
5286                        child->widget->allocation.y);
5287 #endif
5288             }
5289
5290           tmp_list = g_slist_next (tmp_list);
5291         }
5292     }
5293
5294   /* This could result in invalidation, which would install the
5295    * first_validate_idle, which would validate onscreen;
5296    * but we're going to go ahead and validate here, so
5297    * first_validate_idle shouldn't have anything to do.
5298    */
5299   gtk_text_view_update_layout_width (text_view);
5300
5301   /* note that validation of onscreen could invoke this function
5302    * recursively, by scrolling to maintain first_para, or in response
5303    * to updating the layout width, however there is no problem with
5304    * that, or shouldn't be.
5305    */
5306   gtk_text_view_validate_onscreen (text_view);
5307
5308   /* process exposes */
5309   if (GTK_WIDGET_REALIZED (text_view))
5310     {
5311       if (text_view->left_window)
5312         gdk_window_process_updates (text_view->left_window->bin_window, TRUE);
5313
5314       if (text_view->right_window)
5315         gdk_window_process_updates (text_view->right_window->bin_window, TRUE);
5316
5317       if (text_view->top_window)
5318         gdk_window_process_updates (text_view->top_window->bin_window, TRUE);
5319
5320       if (text_view->bottom_window)
5321         gdk_window_process_updates (text_view->bottom_window->bin_window, TRUE);
5322
5323       gdk_window_process_updates (text_view->text_window->bin_window, TRUE);
5324     }
5325
5326   /* If this got installed, get rid of it, it's just a waste of time. */
5327   if (text_view->first_validate_idle != 0)
5328     {
5329       g_source_remove (text_view->first_validate_idle);
5330       text_view->first_validate_idle = 0;
5331     }
5332
5333   gtk_text_view_update_im_spot_location (text_view);
5334
5335   DV(g_print(">End scroll offset changed handler ("G_STRLOC")\n"));
5336 }
5337
5338 static void
5339 gtk_text_view_commit_handler (GtkIMContext  *context,
5340                               const gchar   *str,
5341                               GtkTextView   *text_view)
5342 {
5343   gboolean had_selection;
5344
5345   gtk_text_buffer_begin_user_action (get_buffer (text_view));
5346
5347   had_selection = gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
5348                                                         NULL, NULL);
5349
5350   gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
5351                                     text_view->editable);
5352
5353   if (!strcmp (str, "\n"))
5354     {
5355       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\n", 1,
5356                                                     text_view->editable);
5357     }
5358   else
5359     {
5360       if (!had_selection && text_view->overwrite_mode)
5361         gtk_text_view_delete_from_cursor (text_view, GTK_DELETE_CHARS, 1);
5362       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
5363                                                     text_view->editable);
5364     }
5365
5366   gtk_text_buffer_end_user_action (get_buffer (text_view));
5367
5368   DV(g_print (G_STRLOC": scrolling onscreen\n"));
5369   gtk_text_view_scroll_mark_onscreen (text_view,
5370                                       gtk_text_buffer_get_mark (get_buffer (text_view),
5371                                                                 "insert"));
5372 }
5373
5374 static void
5375 gtk_text_view_preedit_changed_handler (GtkIMContext *context,
5376                                        GtkTextView  *text_view)
5377 {
5378   gchar *str;
5379   PangoAttrList *attrs;
5380   gint cursor_pos;
5381
5382   gtk_im_context_get_preedit_string (context, &str, &attrs, &cursor_pos);
5383   gtk_text_layout_set_preedit_string (text_view->layout, str, attrs, cursor_pos);
5384
5385   pango_attr_list_unref (attrs);
5386   g_free (str);
5387 }
5388
5389 static gboolean
5390 gtk_text_view_retrieve_surrounding_handler (GtkIMContext  *context,
5391                                             GtkTextView   *text_view)
5392 {
5393   GtkTextIter start;
5394   GtkTextIter end;
5395   gint pos;
5396   gchar *text;
5397
5398   gtk_text_buffer_get_iter_at_mark (text_view->buffer, &start,
5399                                     gtk_text_buffer_get_insert (text_view->buffer));
5400   end = start;
5401
5402   pos = gtk_text_iter_get_line_index (&start);
5403   gtk_text_iter_set_line_offset (&start, 0);
5404   gtk_text_iter_forward_to_line_end (&end);
5405
5406   text = gtk_text_iter_get_slice (&start, &end);
5407   gtk_im_context_set_surrounding (context, text, -1, pos);
5408   g_free (text);
5409
5410   return TRUE;
5411 }
5412
5413 static gboolean
5414 gtk_text_view_delete_surrounding_handler (GtkIMContext  *context,
5415                                           gint           offset,
5416                                           gint           n_chars,
5417                                           GtkTextView   *text_view)
5418 {
5419   GtkTextIter start;
5420   GtkTextIter end;
5421
5422   gtk_text_buffer_get_iter_at_mark (text_view->buffer, &start,
5423                                     gtk_text_buffer_get_insert (text_view->buffer));
5424   end = start;
5425
5426   gtk_text_iter_forward_chars (&start, offset);
5427   gtk_text_iter_forward_chars (&end, offset + n_chars);
5428
5429   gtk_text_buffer_delete (text_view->buffer, &start, &end);
5430
5431   return TRUE;
5432 }
5433
5434 static void
5435 gtk_text_view_mark_set_handler (GtkTextBuffer     *buffer,
5436                                 const GtkTextIter *location,
5437                                 GtkTextMark       *mark,
5438                                 gpointer           data)
5439 {
5440   GtkTextView *text_view = GTK_TEXT_VIEW (data);
5441   gboolean need_reset = FALSE;
5442
5443   if (mark == gtk_text_buffer_get_insert (buffer))
5444     {
5445       text_view->virtual_cursor_x = -1;
5446       text_view->virtual_cursor_y = -1;
5447       gtk_text_view_update_im_spot_location (text_view);
5448       need_reset = TRUE;
5449     }
5450   else if (mark == gtk_text_buffer_get_selection_bound (buffer))
5451     {
5452       need_reset = TRUE;
5453     }
5454
5455   if (need_reset)
5456     gtk_text_view_reset_im_context (text_view);
5457 }
5458
5459 static void
5460 gtk_text_view_get_virtual_cursor_pos (GtkTextView *text_view,
5461                                       gint        *x,
5462                                       gint        *y)
5463 {
5464   GdkRectangle strong_pos;
5465   GtkTextIter insert;
5466
5467   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
5468                                     gtk_text_buffer_get_mark (get_buffer (text_view),
5469                                                               "insert"));
5470
5471   if ((x && text_view->virtual_cursor_x == -1) ||
5472       (y && text_view->virtual_cursor_y == -1))
5473     gtk_text_layout_get_cursor_locations (text_view->layout, &insert, &strong_pos, NULL);
5474
5475   if (x)
5476     {
5477       if (text_view->virtual_cursor_x != -1)
5478         *x = text_view->virtual_cursor_x;
5479       else
5480         *x = strong_pos.x;
5481     }
5482
5483   if (y)
5484     {
5485       if (text_view->virtual_cursor_x != -1)
5486         *y = text_view->virtual_cursor_y;
5487       else
5488         *y = strong_pos.y + strong_pos.height / 2;
5489     }
5490 }
5491
5492 static void
5493 gtk_text_view_set_virtual_cursor_pos (GtkTextView *text_view,
5494                                       gint         x,
5495                                       gint         y)
5496 {
5497   GdkRectangle strong_pos;
5498   GtkTextIter insert;
5499
5500   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
5501                                     gtk_text_buffer_get_mark (get_buffer (text_view),
5502                                                               "insert"));
5503
5504   if (x == -1 || y == -1)
5505     gtk_text_layout_get_cursor_locations (text_view->layout, &insert, &strong_pos, NULL);
5506
5507   text_view->virtual_cursor_x = (x == -1) ? strong_pos.x : x;
5508   text_view->virtual_cursor_y = (y == -1) ? strong_pos.y + strong_pos.height / 2 : y;
5509 }
5510
5511 /* Quick hack of a popup menu
5512  */
5513 static void
5514 activate_cb (GtkWidget   *menuitem,
5515              GtkTextView *text_view)
5516 {
5517   const gchar *signal = g_object_get_data (G_OBJECT (menuitem), "gtk-signal");
5518   gtk_signal_emit_by_name (GTK_OBJECT (text_view), signal);
5519 }
5520
5521 static void
5522 append_action_signal (GtkTextView  *text_view,
5523                       GtkWidget    *menu,
5524                       const gchar  *stock_id,
5525                       const gchar  *signal,
5526                       gboolean      sensitive)
5527 {
5528   GtkWidget *menuitem = gtk_image_menu_item_new_from_stock (stock_id, NULL);
5529
5530   g_object_set_data (G_OBJECT (menuitem), "gtk-signal", (char *)signal);
5531   gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
5532                       GTK_SIGNAL_FUNC (activate_cb), text_view);
5533
5534   gtk_widget_set_sensitive (menuitem, sensitive);
5535
5536   gtk_widget_show (menuitem);
5537   gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
5538 }
5539
5540 static void
5541 popup_menu_detach (GtkWidget *attach_widget,
5542                    GtkMenu   *menu)
5543 {
5544   GTK_TEXT_VIEW (attach_widget)->popup_menu = NULL;
5545 }
5546
5547 static void
5548 popup_position_func (GtkMenu   *menu,
5549                      gint      *x,
5550                      gint      *y,
5551                      gboolean  *push_in,
5552                      gpointer   user_data)
5553 {
5554   GtkTextView *text_view;
5555   GtkWidget *widget;
5556   GdkRectangle cursor_rect;
5557   GdkRectangle onscreen_rect;
5558   gint root_x, root_y;
5559   GtkTextIter iter;
5560   GtkRequisition req;
5561
5562   text_view = GTK_TEXT_VIEW (user_data);
5563   widget = GTK_WIDGET (text_view);
5564
5565   g_return_if_fail (GTK_WIDGET_REALIZED (text_view));
5566
5567   gdk_window_get_origin (widget->window, &root_x, &root_y);
5568
5569   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
5570                                     &iter,
5571                                     gtk_text_buffer_get_insert (get_buffer (text_view)));
5572
5573   gtk_text_view_get_iter_location (text_view,
5574                                    &iter,
5575                                    &cursor_rect);
5576
5577   gtk_text_view_get_visible_rect (text_view, &onscreen_rect);
5578
5579   gtk_widget_size_request (text_view->popup_menu, &req);
5580
5581   /* can't use rectangle_intersect since cursor rect can have 0 width */
5582   if (cursor_rect.x >= onscreen_rect.x &&
5583       cursor_rect.x < onscreen_rect.x + onscreen_rect.width &&
5584       cursor_rect.y >= onscreen_rect.y &&
5585       cursor_rect.y < onscreen_rect.y + onscreen_rect.height)
5586     {
5587       gtk_text_view_buffer_to_window_coords (text_view,
5588                                              GTK_TEXT_WINDOW_WIDGET,
5589                                              cursor_rect.x, cursor_rect.y,
5590                                              &cursor_rect.x, &cursor_rect.y);
5591
5592       *x = root_x + cursor_rect.x + cursor_rect.width;
5593       *y = root_y + cursor_rect.y + cursor_rect.height;
5594     }
5595   else
5596     {
5597       /* Just center the menu, since cursor is offscreen. */
5598       *x = root_x + (widget->allocation.width / 2 - req.width / 2);
5599       *y = root_y + (widget->allocation.height / 2 - req.height / 2);
5600     }
5601
5602   /* Ensure sanity */
5603   *x = CLAMP (*x, root_x, (root_x + widget->allocation.width));
5604   *y = CLAMP (*y, root_y, (root_y + widget->allocation.height));
5605
5606   *x = CLAMP (*x, 0, MAX (0, gdk_screen_width () - req.width));
5607   *y = CLAMP (*y, 0, MAX (0, gdk_screen_height () - req.height));
5608 }
5609
5610 typedef struct
5611 {
5612   GtkTextView *text_view;
5613   gint button;
5614   guint time;
5615 } PopupInfo;
5616
5617 static gboolean
5618 range_contains_editable_text (const GtkTextIter *start,
5619                               const GtkTextIter *end,
5620                               gboolean default_editability)
5621 {
5622   GtkTextIter iter = *start;
5623
5624   while (gtk_text_iter_compare (&iter, end) < 0)
5625     {
5626       if (gtk_text_iter_editable (&iter, default_editability))
5627         return TRUE;
5628
5629       gtk_text_iter_forward_to_tag_toggle (&iter, NULL);
5630     }
5631
5632   return FALSE;
5633 }
5634
5635 static void
5636 popup_targets_received (GtkClipboard     *clipboard,
5637                         GtkSelectionData *data,
5638                         gpointer          user_data)
5639 {
5640   PopupInfo *info = user_data;
5641   GtkTextView *text_view = info->text_view;
5642
5643   if (GTK_WIDGET_REALIZED (text_view))
5644     {
5645       /* We implicitely rely here on the fact that if we are pasting ourself, we'll
5646        * have text targets as well as the private GTK_TEXT_BUFFER_CONTENTS target.
5647        */
5648       gboolean clipboard_contains_text = gtk_selection_data_targets_include_text (data);
5649       GtkWidget *menuitem;
5650       GtkWidget *submenu;
5651       gboolean have_selection;
5652       gboolean can_insert;
5653       GtkTextIter iter;
5654       GtkTextIter sel_start, sel_end;
5655
5656       if (text_view->popup_menu)
5657         gtk_widget_destroy (text_view->popup_menu);
5658
5659       text_view->popup_menu = gtk_menu_new ();
5660
5661       gtk_menu_attach_to_widget (GTK_MENU (text_view->popup_menu),
5662                                  GTK_WIDGET (text_view),
5663                                  popup_menu_detach);
5664
5665       have_selection = gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
5666                                                              &sel_start, &sel_end);
5667
5668       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
5669                                         &iter,
5670                                         gtk_text_buffer_get_insert (get_buffer (text_view)));
5671
5672       can_insert = gtk_text_iter_can_insert (&iter, text_view->editable);
5673
5674       append_action_signal (text_view, text_view->popup_menu, GTK_STOCK_CUT, "cut_clipboard",
5675                             have_selection &&
5676                             range_contains_editable_text (&sel_start, &sel_end,
5677                                                           text_view->editable));
5678       append_action_signal (text_view, text_view->popup_menu, GTK_STOCK_COPY, "copy_clipboard",
5679                             have_selection);
5680       append_action_signal (text_view, text_view->popup_menu, GTK_STOCK_PASTE, "paste_clipboard",
5681                             can_insert && clipboard_contains_text);
5682
5683       menuitem = gtk_separator_menu_item_new ();
5684       gtk_widget_show (menuitem);
5685       gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
5686
5687       menuitem = gtk_menu_item_new_with_label (_("Input Methods"));
5688       gtk_widget_show (menuitem);
5689       submenu = gtk_menu_new ();
5690       gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), submenu);
5691       gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
5692
5693       gtk_im_multicontext_append_menuitems (GTK_IM_MULTICONTEXT (text_view->im_context),
5694                                             GTK_MENU_SHELL (submenu));
5695
5696       gtk_signal_emit (GTK_OBJECT (text_view),
5697                        signals[POPULATE_POPUP],
5698                        text_view->popup_menu);
5699
5700       if (info->button)
5701         gtk_menu_popup (GTK_MENU (text_view->popup_menu), NULL, NULL,
5702                         NULL, NULL,
5703                         info->button, info->time);
5704       else
5705         gtk_menu_popup (GTK_MENU (text_view->popup_menu), NULL, NULL,
5706                         popup_position_func, text_view,
5707                         0, gtk_get_current_event_time ());
5708     }
5709
5710   g_object_unref (text_view);
5711   g_free (info);
5712 }
5713
5714 static void
5715 gtk_text_view_do_popup (GtkTextView    *text_view,
5716                         GdkEventButton *event)
5717 {
5718   PopupInfo *info = g_new (PopupInfo, 1);
5719
5720   /* In order to know what entries we should make sensitive, we
5721    * ask for the current targets of the clipboard, and when
5722    * we get them, then we actually pop up the menu.
5723    */
5724   info->text_view = g_object_ref (text_view);
5725
5726   if (event)
5727     {
5728       info->button = event->button;
5729       info->time = event->time;
5730     }
5731   else
5732     {
5733       info->button = 0;
5734       info->time = gtk_get_current_event_time ();
5735     }
5736
5737   gtk_clipboard_request_contents (gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
5738                                   gdk_atom_intern ("TARGETS", FALSE),
5739                                   popup_targets_received,
5740                                   info);
5741 }
5742
5743 static void
5744 gtk_text_view_popup_menu (GtkWidget *widget)
5745 {
5746   gtk_text_view_do_popup (GTK_TEXT_VIEW (widget), NULL);
5747 }
5748
5749 /* Child GdkWindows */
5750
5751
5752 static GtkTextWindow*
5753 text_window_new (GtkTextWindowType  type,
5754                  GtkWidget         *widget,
5755                  gint               width_request,
5756                  gint               height_request)
5757 {
5758   GtkTextWindow *win;
5759
5760   win = g_new (GtkTextWindow, 1);
5761
5762   win->type = type;
5763   win->widget = widget;
5764   win->window = NULL;
5765   win->bin_window = NULL;
5766   win->requisition.width = width_request;
5767   win->requisition.height = height_request;
5768   win->allocation.width = width_request;
5769   win->allocation.height = height_request;
5770   win->allocation.x = 0;
5771   win->allocation.y = 0;
5772
5773   return win;
5774 }
5775
5776 static void
5777 text_window_free (GtkTextWindow *win)
5778 {
5779   if (win->window)
5780     text_window_unrealize (win);
5781
5782   g_free (win);
5783 }
5784
5785 static void
5786 text_window_realize (GtkTextWindow *win,
5787                      GdkWindow     *parent)
5788 {
5789   GdkWindowAttr attributes;
5790   gint attributes_mask;
5791   GdkCursor *cursor;
5792
5793   attributes.window_type = GDK_WINDOW_CHILD;
5794   attributes.x = win->allocation.x;
5795   attributes.y = win->allocation.y;
5796   attributes.width = win->allocation.width;
5797   attributes.height = win->allocation.height;
5798   attributes.wclass = GDK_INPUT_OUTPUT;
5799   attributes.visual = gtk_widget_get_visual (win->widget);
5800   attributes.colormap = gtk_widget_get_colormap (win->widget);
5801   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK;
5802
5803   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
5804
5805   win->window = gdk_window_new (parent,
5806                                 &attributes,
5807                                 attributes_mask);
5808
5809   gdk_window_show (win->window);
5810   gdk_window_set_user_data (win->window, win->widget);
5811
5812   attributes.x = 0;
5813   attributes.y = 0;
5814   attributes.width = win->allocation.width;
5815   attributes.height = win->allocation.height;
5816   attributes.event_mask = (GDK_EXPOSURE_MASK            |
5817                            GDK_SCROLL_MASK              |
5818                            GDK_KEY_PRESS_MASK           |
5819                            GDK_BUTTON_PRESS_MASK        |
5820                            GDK_BUTTON_RELEASE_MASK      |
5821                            GDK_POINTER_MOTION_MASK      |
5822                            GDK_POINTER_MOTION_HINT_MASK |
5823                            gtk_widget_get_events (win->widget));
5824
5825   win->bin_window = gdk_window_new (win->window,
5826                                     &attributes,
5827                                     attributes_mask);
5828
5829   gdk_window_show (win->bin_window);
5830   gdk_window_set_user_data (win->bin_window, win->widget);
5831
5832   if (win->type == GTK_TEXT_WINDOW_TEXT)
5833     {
5834       /* I-beam cursor */
5835       cursor = gdk_cursor_new (GDK_XTERM);
5836       gdk_window_set_cursor (win->bin_window, cursor);
5837       gdk_cursor_destroy (cursor);
5838
5839       gtk_im_context_set_client_window (GTK_TEXT_VIEW (win->widget)->im_context,
5840                                         win->window);
5841
5842
5843       gdk_window_set_background (win->bin_window,
5844                                  &win->widget->style->base[GTK_WIDGET_STATE (win->widget)]);
5845     }
5846   else
5847     {
5848       gdk_window_set_background (win->bin_window,
5849                                  &win->widget->style->bg[GTK_WIDGET_STATE (win->widget)]);
5850     }
5851
5852   g_object_set_qdata (G_OBJECT (win->window),
5853                       g_quark_from_static_string ("gtk-text-view-text-window"),
5854                       win);
5855
5856   g_object_set_qdata (G_OBJECT (win->bin_window),
5857                       g_quark_from_static_string ("gtk-text-view-text-window"),
5858                       win);
5859 }
5860
5861 static void
5862 text_window_unrealize (GtkTextWindow *win)
5863 {
5864   if (win->type == GTK_TEXT_WINDOW_TEXT)
5865     {
5866       gtk_im_context_set_client_window (GTK_TEXT_VIEW (win->widget)->im_context,
5867                                         NULL);
5868     }
5869
5870   gdk_window_set_user_data (win->window, NULL);
5871   gdk_window_set_user_data (win->bin_window, NULL);
5872   gdk_window_destroy (win->bin_window);
5873   gdk_window_destroy (win->window);
5874   win->window = NULL;
5875   win->bin_window = NULL;
5876 }
5877
5878 static void
5879 text_window_size_allocate (GtkTextWindow *win,
5880                            GdkRectangle  *rect)
5881 {
5882   win->allocation = *rect;
5883
5884   if (win->window)
5885     {
5886       gdk_window_move_resize (win->window,
5887                               rect->x, rect->y,
5888                               rect->width, rect->height);
5889
5890       gdk_window_resize (win->bin_window,
5891                          rect->width, rect->height);
5892     }
5893 }
5894
5895 static void
5896 text_window_scroll        (GtkTextWindow *win,
5897                            gint           dx,
5898                            gint           dy)
5899 {
5900   if (dx != 0 || dy != 0)
5901     {
5902       gdk_window_scroll (win->bin_window, dx, dy);
5903     }
5904 }
5905
5906 static void
5907 text_window_invalidate_rect (GtkTextWindow *win,
5908                              GdkRectangle  *rect)
5909 {
5910   GdkRectangle window_rect;
5911
5912   gtk_text_view_buffer_to_window_coords (GTK_TEXT_VIEW (win->widget),
5913                                          win->type,
5914                                          rect->x,
5915                                          rect->y,
5916                                          &window_rect.x,
5917                                          &window_rect.y);
5918
5919   window_rect.width = rect->width;
5920   window_rect.height = rect->height;
5921
5922   /* Adjust the rect as appropriate */
5923
5924   switch (win->type)
5925     {
5926     case GTK_TEXT_WINDOW_TEXT:
5927       break;
5928
5929     case GTK_TEXT_WINDOW_LEFT:
5930     case GTK_TEXT_WINDOW_RIGHT:
5931       window_rect.x = 0;
5932       window_rect.width = win->allocation.width;
5933       break;
5934
5935     case GTK_TEXT_WINDOW_TOP:
5936     case GTK_TEXT_WINDOW_BOTTOM:
5937       window_rect.y = 0;
5938       window_rect.height = win->allocation.height;
5939       break;
5940
5941     default:
5942       g_warning ("%s: bug!", G_STRLOC);
5943       return;
5944       break;
5945     }
5946
5947   gdk_window_invalidate_rect (win->bin_window, &window_rect, FALSE);
5948
5949 #if 0
5950   {
5951     GdkColor color = { 0, 65535, 0, 0 };
5952     GdkGC *gc = gdk_gc_new (win->bin_window);
5953     gdk_gc_set_rgb_fg_color (gc, &color);
5954     gdk_draw_rectangle (win->bin_window,
5955                         gc, TRUE, window_rect.x, window_rect.y,
5956                         window_rect.width, window_rect.height);
5957     gdk_gc_unref (gc);
5958   }
5959 #endif
5960 }
5961
5962 static gint
5963 text_window_get_width (GtkTextWindow *win)
5964 {
5965   return win->allocation.width;
5966 }
5967
5968 static gint
5969 text_window_get_height (GtkTextWindow *win)
5970 {
5971   return win->allocation.height;
5972 }
5973
5974 static void
5975 text_window_get_allocation (GtkTextWindow *win,
5976                             GdkRectangle  *rect)
5977 {
5978   *rect = win->allocation;
5979 }
5980
5981 /* Windows */
5982
5983
5984 /**
5985  * gtk_text_view_get_window:
5986  * @text_view: a #GtkTextView
5987  * @win: window to get
5988  *
5989  * Retrieves the #GdkWindow corresponding to an area of the text view;
5990  * possible windows include the overall widget window, child windows
5991  * on the left, right, top, bottom, and the window that displays the
5992  * text buffer. Windows are %NULL and nonexistent if their width or
5993  * height is 0, and are nonexistent before the widget has been
5994  * realized.
5995  *
5996  * Return value: a #GdkWindow, or %NULL
5997  **/
5998 GdkWindow*
5999 gtk_text_view_get_window (GtkTextView *text_view,
6000                           GtkTextWindowType win)
6001 {
6002   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
6003
6004   switch (win)
6005     {
6006     case GTK_TEXT_WINDOW_WIDGET:
6007       return GTK_WIDGET (text_view)->window;
6008       break;
6009
6010     case GTK_TEXT_WINDOW_TEXT:
6011       return text_view->text_window->bin_window;
6012       break;
6013
6014     case GTK_TEXT_WINDOW_LEFT:
6015       if (text_view->left_window)
6016         return text_view->left_window->bin_window;
6017       else
6018         return NULL;
6019       break;
6020
6021     case GTK_TEXT_WINDOW_RIGHT:
6022       if (text_view->right_window)
6023         return text_view->right_window->bin_window;
6024       else
6025         return NULL;
6026       break;
6027
6028     case GTK_TEXT_WINDOW_TOP:
6029       if (text_view->top_window)
6030         return text_view->top_window->bin_window;
6031       else
6032         return NULL;
6033       break;
6034
6035     case GTK_TEXT_WINDOW_BOTTOM:
6036       if (text_view->bottom_window)
6037         return text_view->bottom_window->bin_window;
6038       else
6039         return NULL;
6040       break;
6041
6042     default:
6043       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
6044       return NULL;
6045       break;
6046     }
6047 }
6048
6049 /**
6050  * gtk_text_view_get_window_type:
6051  * @text_view: a #GtkTextView
6052  * @window: a window type
6053  *
6054  * Usually used to find out which window an event corresponds to.
6055  * If you connect to an event signal on @text_view, this function
6056  * should be called on <literal>event-&gt;window</literal> to
6057  * see which window it was.
6058  *
6059  * Return value: the window type.
6060  **/
6061 GtkTextWindowType
6062 gtk_text_view_get_window_type (GtkTextView *text_view,
6063                                GdkWindow   *window)
6064 {
6065   GtkTextWindow *win;
6066
6067   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
6068   g_return_val_if_fail (GDK_IS_WINDOW (window), 0);
6069
6070   if (window == GTK_WIDGET (text_view)->window)
6071     return GTK_TEXT_WINDOW_WIDGET;
6072
6073   win = g_object_get_qdata (G_OBJECT (window),
6074                             g_quark_try_string ("gtk-text-view-text-window"));
6075
6076   if (win)
6077     return win->type;
6078   else
6079     {
6080       return GTK_TEXT_WINDOW_PRIVATE;
6081     }
6082 }
6083
6084 static void
6085 buffer_to_widget (GtkTextView      *text_view,
6086                   gint              buffer_x,
6087                   gint              buffer_y,
6088                   gint             *window_x,
6089                   gint             *window_y)
6090 {
6091   gint focus_edge_width;
6092   gboolean interior_focus;
6093
6094   gtk_widget_style_get (GTK_WIDGET (text_view), "interior_focus", &interior_focus, NULL);
6095
6096   if (interior_focus)
6097     focus_edge_width = 0;
6098   else
6099     focus_edge_width = 1;
6100
6101   if (window_x)
6102     {
6103       *window_x = buffer_x - text_view->xoffset + focus_edge_width;
6104       if (text_view->left_window)
6105         *window_x += text_view->left_window->allocation.width;
6106     }
6107
6108   if (window_y)
6109     {
6110       *window_y = buffer_y - text_view->yoffset + focus_edge_width;
6111       if (text_view->top_window)
6112         *window_y += text_view->top_window->allocation.height;
6113     }
6114 }
6115
6116 static void
6117 widget_to_text_window (GtkTextWindow *win,
6118                        gint           widget_x,
6119                        gint           widget_y,
6120                        gint          *window_x,
6121                        gint          *window_y)
6122 {
6123   if (window_x)
6124     *window_x = widget_x - win->allocation.x;
6125
6126   if (window_y)
6127     *window_y = widget_y - win->allocation.y;
6128 }
6129
6130 static void
6131 buffer_to_text_window (GtkTextView   *text_view,
6132                        GtkTextWindow *win,
6133                        gint           buffer_x,
6134                        gint           buffer_y,
6135                        gint          *window_x,
6136                        gint          *window_y)
6137 {
6138   if (win == NULL)
6139     {
6140       g_warning ("Attempt to convert text buffer coordinates to coordinates "
6141                  "for a nonexistent or private child window of GtkTextView");
6142       return;
6143     }
6144
6145   buffer_to_widget (text_view,
6146                     buffer_x, buffer_y,
6147                     window_x, window_y);
6148
6149   widget_to_text_window (win,
6150                          window_x ? *window_x : 0,
6151                          window_y ? *window_y : 0,
6152                          window_x,
6153                          window_y);
6154 }
6155
6156 /**
6157  * gtk_text_view_buffer_to_window_coords:
6158  * @text_view: a #GtkTextView
6159  * @win: a #GtkTextWindowType
6160  * @buffer_x: buffer x coordinate
6161  * @buffer_y: buffer y coordinate
6162  * @window_x: window x coordinate return location
6163  * @window_y: window y coordinate return location
6164  *
6165  * Converts coordinate (@buffer_x, @buffer_y) to coordinates for the window
6166  * @win, and stores the result in (@window_x, @window_y).
6167  **/
6168 void
6169 gtk_text_view_buffer_to_window_coords (GtkTextView      *text_view,
6170                                        GtkTextWindowType win,
6171                                        gint              buffer_x,
6172                                        gint              buffer_y,
6173                                        gint             *window_x,
6174                                        gint             *window_y)
6175 {
6176   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6177
6178   switch (win)
6179     {
6180     case GTK_TEXT_WINDOW_WIDGET:
6181       buffer_to_widget (text_view,
6182                         buffer_x, buffer_y,
6183                         window_x, window_y);
6184       break;
6185
6186     case GTK_TEXT_WINDOW_TEXT:
6187       if (window_x)
6188         *window_x = buffer_x - text_view->xoffset;
6189       if (window_y)
6190         *window_y = buffer_y - text_view->yoffset;
6191       break;
6192
6193     case GTK_TEXT_WINDOW_LEFT:
6194       buffer_to_text_window (text_view,
6195                              text_view->left_window,
6196                              buffer_x, buffer_y,
6197                              window_x, window_y);
6198       break;
6199
6200     case GTK_TEXT_WINDOW_RIGHT:
6201       buffer_to_text_window (text_view,
6202                              text_view->right_window,
6203                              buffer_x, buffer_y,
6204                              window_x, window_y);
6205       break;
6206
6207     case GTK_TEXT_WINDOW_TOP:
6208       buffer_to_text_window (text_view,
6209                              text_view->top_window,
6210                              buffer_x, buffer_y,
6211                              window_x, window_y);
6212       break;
6213
6214     case GTK_TEXT_WINDOW_BOTTOM:
6215       buffer_to_text_window (text_view,
6216                              text_view->bottom_window,
6217                              buffer_x, buffer_y,
6218                              window_x, window_y);
6219       break;
6220
6221     case GTK_TEXT_WINDOW_PRIVATE:
6222       g_warning ("%s: can't get coords for private windows", G_STRLOC);
6223       break;
6224
6225     default:
6226       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
6227       break;
6228     }
6229 }
6230
6231 static void
6232 widget_to_buffer (GtkTextView *text_view,
6233                   gint         widget_x,
6234                   gint         widget_y,
6235                   gint        *buffer_x,
6236                   gint        *buffer_y)
6237 {
6238   gint focus_edge_width;
6239   gboolean interior_focus;
6240
6241   gtk_widget_style_get (GTK_WIDGET (text_view), "interior_focus", &interior_focus, NULL);
6242
6243   if (interior_focus)
6244     focus_edge_width = 0;
6245   else
6246     focus_edge_width = 1;
6247
6248   if (buffer_x)
6249     {
6250       *buffer_x = widget_x - focus_edge_width + text_view->xoffset;
6251       if (text_view->left_window)
6252         *buffer_x -= text_view->left_window->allocation.width;
6253     }
6254
6255   if (buffer_y)
6256     {
6257       *buffer_y = widget_y - focus_edge_width + text_view->yoffset;
6258       if (text_view->top_window)
6259         *buffer_y -= text_view->top_window->allocation.height;
6260     }
6261 }
6262
6263 static void
6264 text_window_to_widget (GtkTextWindow *win,
6265                        gint           window_x,
6266                        gint           window_y,
6267                        gint          *widget_x,
6268                        gint          *widget_y)
6269 {
6270   if (widget_x)
6271     *widget_x = window_x + win->allocation.x;
6272
6273   if (widget_y)
6274     *widget_y = window_y + win->allocation.y;
6275 }
6276
6277 static void
6278 text_window_to_buffer (GtkTextView   *text_view,
6279                        GtkTextWindow *win,
6280                        gint           window_x,
6281                        gint           window_y,
6282                        gint          *buffer_x,
6283                        gint          *buffer_y)
6284 {
6285   if (win == NULL)
6286     {
6287       g_warning ("Attempt to convert GtkTextView buffer coordinates into "
6288                  "coordinates for a nonexistent child window.");
6289       return;
6290     }
6291
6292   text_window_to_widget (win,
6293                          window_x,
6294                          window_y,
6295                          buffer_x,
6296                          buffer_y);
6297
6298   widget_to_buffer (text_view,
6299                     buffer_x ? *buffer_x : 0,
6300                     buffer_y ? *buffer_y : 0,
6301                     buffer_x,
6302                     buffer_y);
6303 }
6304
6305 /**
6306  * gtk_text_view_window_to_buffer_coords:
6307  * @text_view: a #GtkTextView
6308  * @win: a #GtkTextWindowType
6309  * @window_x: window x coordinate
6310  * @window_y: window y coordinate
6311  * @buffer_x: buffer x coordinate return location
6312  * @buffer_y: buffer y coordinate return location
6313  *
6314  * Converts coordinates on the window identified by @win to buffer
6315  * coordinates, storing the result in (@buffer_x,@buffer_y).
6316  **/
6317 void
6318 gtk_text_view_window_to_buffer_coords (GtkTextView      *text_view,
6319                                        GtkTextWindowType win,
6320                                        gint              window_x,
6321                                        gint              window_y,
6322                                        gint             *buffer_x,
6323                                        gint             *buffer_y)
6324 {
6325   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6326
6327   switch (win)
6328     {
6329     case GTK_TEXT_WINDOW_WIDGET:
6330       widget_to_buffer (text_view,
6331                         window_x, window_y,
6332                         buffer_x, buffer_y);
6333       break;
6334
6335     case GTK_TEXT_WINDOW_TEXT:
6336       if (buffer_x)
6337         *buffer_x = window_x + text_view->xoffset;
6338       if (buffer_y)
6339         *buffer_y = window_y + text_view->yoffset;
6340       break;
6341
6342     case GTK_TEXT_WINDOW_LEFT:
6343       text_window_to_buffer (text_view,
6344                              text_view->left_window,
6345                              window_x, window_y,
6346                              buffer_x, buffer_y);
6347       break;
6348
6349     case GTK_TEXT_WINDOW_RIGHT:
6350       text_window_to_buffer (text_view,
6351                              text_view->right_window,
6352                              window_x, window_y,
6353                              buffer_x, buffer_y);
6354       break;
6355
6356     case GTK_TEXT_WINDOW_TOP:
6357       text_window_to_buffer (text_view,
6358                              text_view->top_window,
6359                              window_x, window_y,
6360                              buffer_x, buffer_y);
6361       break;
6362
6363     case GTK_TEXT_WINDOW_BOTTOM:
6364       text_window_to_buffer (text_view,
6365                              text_view->bottom_window,
6366                              window_x, window_y,
6367                              buffer_x, buffer_y);
6368       break;
6369
6370     case GTK_TEXT_WINDOW_PRIVATE:
6371       g_warning ("%s: can't get coords for private windows", G_STRLOC);
6372       break;
6373
6374     default:
6375       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
6376       break;
6377     }
6378 }
6379
6380 static void
6381 set_window_width (GtkTextView      *text_view,
6382                   gint              width,
6383                   GtkTextWindowType type,
6384                   GtkTextWindow   **winp)
6385 {
6386   if (width == 0)
6387     {
6388       if (*winp)
6389         {
6390           text_window_free (*winp);
6391           *winp = NULL;
6392           gtk_widget_queue_resize (GTK_WIDGET (text_view));
6393         }
6394     }
6395   else
6396     {
6397       if (*winp == NULL)
6398         {
6399           *winp = text_window_new (type,
6400                                    GTK_WIDGET (text_view),
6401                                    width, 0);
6402           /* if the widget is already realized we need to realize the child manually */
6403           if (GTK_WIDGET_REALIZED (text_view))
6404             text_window_realize (*winp, GTK_WIDGET (text_view)->window);
6405         }
6406       else
6407         {
6408           if ((*winp)->requisition.width == width)
6409             return;
6410         }
6411
6412       gtk_widget_queue_resize (GTK_WIDGET (text_view));
6413     }
6414 }
6415
6416
6417 static void
6418 set_window_height (GtkTextView      *text_view,
6419                    gint              height,
6420                    GtkTextWindowType type,
6421                    GtkTextWindow   **winp)
6422 {
6423   if (height == 0)
6424     {
6425       if (*winp)
6426         {
6427           text_window_free (*winp);
6428           *winp = NULL;
6429           gtk_widget_queue_resize (GTK_WIDGET (text_view));
6430         }
6431     }
6432   else
6433     {
6434       if (*winp == NULL)
6435         {
6436           *winp = text_window_new (type,
6437                                    GTK_WIDGET (text_view),
6438                                    0, height);
6439
6440           /* if the widget is already realized we need to realize the child manually */
6441           if (GTK_WIDGET_REALIZED (text_view))
6442             text_window_realize (*winp, GTK_WIDGET (text_view)->window);
6443         }
6444       else
6445         {
6446           if ((*winp)->requisition.height == height)
6447             return;
6448         }
6449
6450       gtk_widget_queue_resize (GTK_WIDGET (text_view));
6451     }
6452 }
6453
6454 /**
6455  * gtk_text_view_set_border_window_size:
6456  * @text_view: a #GtkTextView
6457  * @type: window to affect
6458  * @size: width or height of the window
6459  *
6460  * Sets the width of %GTK_TEXT_WINDOW_LEFT or %GTK_TEXT_WINDOW_RIGHT,
6461  * or the height of %GTK_TEXT_WINDOW_TOP or %GTK_TEXT_WINDOW_BOTTOM.
6462  * Automatically destroys the corresponding window if the size is set
6463  * to 0, and creates the window if the size is set to non-zero.  This
6464  * function can only be used for the "border windows," it doesn't work
6465  * with #GTK_TEXT_WINDOW_WIDGET, #GTK_TEXT_WINDOW_TEXT, or
6466  * #GTK_TEXT_WINDOW_PRIVATE.
6467  **/
6468 void
6469 gtk_text_view_set_border_window_size (GtkTextView      *text_view,
6470                                       GtkTextWindowType type,
6471                                       gint              size)
6472
6473 {
6474   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6475   g_return_if_fail (size >= 0);
6476
6477   switch (type)
6478     {
6479     case GTK_TEXT_WINDOW_LEFT:
6480       set_window_width (text_view, size, GTK_TEXT_WINDOW_LEFT,
6481                         &text_view->left_window);
6482       break;
6483
6484     case GTK_TEXT_WINDOW_RIGHT:
6485       set_window_width (text_view, size, GTK_TEXT_WINDOW_RIGHT,
6486                         &text_view->right_window);
6487       break;
6488
6489     case GTK_TEXT_WINDOW_TOP:
6490       set_window_height (text_view, size, GTK_TEXT_WINDOW_TOP,
6491                          &text_view->top_window);
6492       break;
6493
6494     case GTK_TEXT_WINDOW_BOTTOM:
6495       set_window_height (text_view, size, GTK_TEXT_WINDOW_BOTTOM,
6496                          &text_view->bottom_window);
6497       break;
6498
6499     default:
6500       g_warning ("Can only set size of left/right/top/bottom border windows with gtk_text_view_set_border_window_size()");
6501       break;
6502     }
6503 }
6504
6505 /**
6506  * gtk_text_view_get_border_window_size:
6507  * @text_view: a #GtkTextView
6508  * @type: window to return size from
6509  *
6510  * Gets the width of the specified border window. See
6511  * gtk_text_view_set_border_window_size().
6512  *
6513  * Return value: width of window
6514  **/
6515 gint
6516 gtk_text_view_get_border_window_size (GtkTextView       *text_view,
6517                                       GtkTextWindowType  type)
6518 {
6519   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
6520
6521   switch (type)
6522     {
6523     case GTK_TEXT_WINDOW_LEFT:
6524       if (text_view->left_window)
6525         return text_view->left_window->requisition.width;
6526
6527     case GTK_TEXT_WINDOW_RIGHT:
6528       if (text_view->right_window)
6529         return text_view->right_window->requisition.width;
6530
6531     case GTK_TEXT_WINDOW_TOP:
6532       if (text_view->top_window)
6533         return text_view->top_window->requisition.height;
6534
6535     case GTK_TEXT_WINDOW_BOTTOM:
6536       if (text_view->bottom_window)
6537         return text_view->bottom_window->requisition.height;
6538
6539     default:
6540       g_warning ("Can only get size of left/right/top/bottom border windows with gtk_text_view_get_border_window_size()");
6541       break;
6542     }
6543
6544   return 0;
6545 }
6546
6547 /*
6548  * Child widgets
6549  */
6550
6551 static GtkTextViewChild*
6552 text_view_child_new_anchored (GtkWidget          *child,
6553                               GtkTextChildAnchor *anchor,
6554                               GtkTextLayout      *layout)
6555 {
6556   GtkTextViewChild *vc;
6557
6558   vc = g_new (GtkTextViewChild, 1);
6559
6560   vc->widget = child;
6561   vc->anchor = anchor;
6562
6563   vc->from_top_of_line = 0;
6564   vc->from_left_of_buffer = 0;
6565
6566   g_object_ref (G_OBJECT (vc->widget));
6567   g_object_ref (G_OBJECT (vc->anchor));
6568
6569   g_object_set_data (G_OBJECT (child),
6570                      "gtk-text-view-child",
6571                      vc);
6572
6573   gtk_text_child_anchor_register_child (anchor, child, layout);
6574
6575   return vc;
6576 }
6577
6578 static GtkTextViewChild*
6579 text_view_child_new_window (GtkWidget          *child,
6580                             GtkTextWindowType   type,
6581                             gint                x,
6582                             gint                y)
6583 {
6584   GtkTextViewChild *vc;
6585
6586   vc = g_new (GtkTextViewChild, 1);
6587
6588   vc->widget = child;
6589   vc->anchor = NULL;
6590
6591   vc->from_top_of_line = 0;
6592   vc->from_left_of_buffer = 0;
6593
6594   g_object_ref (G_OBJECT (vc->widget));
6595
6596   vc->type = type;
6597   vc->x = x;
6598   vc->y = y;
6599
6600   return vc;
6601 }
6602
6603 static void
6604 text_view_child_free (GtkTextViewChild *child)
6605 {
6606   g_object_set_data (G_OBJECT (child->widget),
6607                      "gtk-text-view-child", NULL);
6608
6609   if (child->anchor)
6610     {
6611       gtk_text_child_anchor_unregister_child (child->anchor,
6612                                               child->widget);
6613       g_object_unref (G_OBJECT (child->anchor));
6614     }
6615
6616   g_object_unref (G_OBJECT (child->widget));
6617
6618   g_free (child);
6619 }
6620
6621 static void
6622 text_view_child_set_parent_window (GtkTextView      *text_view,
6623                                    GtkTextViewChild *vc)
6624 {
6625   if (vc->anchor)
6626     gtk_widget_set_parent_window (vc->widget,
6627                                   text_view->text_window->bin_window);
6628   else
6629     {
6630       GdkWindow *window;
6631       window = gtk_text_view_get_window (text_view,
6632                                          vc->type);
6633       gtk_widget_set_parent_window (vc->widget, window);
6634     }
6635 }
6636
6637 static void
6638 add_child (GtkTextView      *text_view,
6639            GtkTextViewChild *vc)
6640 {
6641   text_view->children = g_slist_prepend (text_view->children,
6642                                          vc);
6643
6644   if (GTK_WIDGET_REALIZED (text_view))
6645     text_view_child_set_parent_window (text_view, vc);
6646
6647   gtk_widget_set_parent (vc->widget, GTK_WIDGET (text_view));
6648 }
6649
6650 void
6651 gtk_text_view_add_child_at_anchor (GtkTextView          *text_view,
6652                                    GtkWidget            *child,
6653                                    GtkTextChildAnchor   *anchor)
6654 {
6655   GtkTextViewChild *vc;
6656
6657   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6658   g_return_if_fail (GTK_IS_WIDGET (child));
6659   g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
6660   g_return_if_fail (child->parent == NULL);
6661
6662   gtk_text_view_ensure_layout (text_view);
6663
6664   vc = text_view_child_new_anchored (child, anchor,
6665                                      text_view->layout);
6666
6667   add_child (text_view, vc);
6668 }
6669
6670 void
6671 gtk_text_view_add_child_in_window (GtkTextView          *text_view,
6672                                    GtkWidget            *child,
6673                                    GtkTextWindowType     which_window,
6674                                    gint                  xpos,
6675                                    gint                  ypos)
6676 {
6677   GtkTextViewChild *vc;
6678
6679   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6680   g_return_if_fail (GTK_IS_WIDGET (child));
6681   g_return_if_fail (xpos >= 0);
6682   g_return_if_fail (ypos >= 0);
6683   g_return_if_fail (child->parent == NULL);
6684
6685   vc = text_view_child_new_window (child, which_window,
6686                                    xpos, ypos);
6687
6688   add_child (text_view, vc);
6689 }
6690
6691 void
6692 gtk_text_view_move_child          (GtkTextView          *text_view,
6693                                    GtkWidget            *child,
6694                                    gint                  xpos,
6695                                    gint                  ypos)
6696 {
6697   GtkTextViewChild *vc;
6698
6699   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6700   g_return_if_fail (GTK_IS_WIDGET (child));
6701   g_return_if_fail (xpos >= 0);
6702   g_return_if_fail (ypos >= 0);
6703   g_return_if_fail (child->parent == (GtkWidget*) text_view);
6704
6705   vc = g_object_get_data (G_OBJECT (child),
6706                           "gtk-text-view-child");
6707
6708   g_assert (vc != NULL);
6709
6710   vc->x = xpos;
6711   vc->y = ypos;
6712
6713   if (GTK_WIDGET_VISIBLE (child) && GTK_WIDGET_VISIBLE (text_view))
6714     gtk_widget_queue_resize (child);
6715 }
6716
6717
6718
6719 /* Iterator operations */
6720
6721 gboolean
6722 gtk_text_view_forward_display_line (GtkTextView *text_view,
6723                                     GtkTextIter *iter)
6724 {
6725   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6726   g_return_val_if_fail (iter != NULL, FALSE);
6727
6728   gtk_text_view_ensure_layout (text_view);
6729
6730   return gtk_text_layout_move_iter_to_next_line (text_view->layout, iter);
6731 }
6732
6733 gboolean
6734 gtk_text_view_backward_display_line (GtkTextView *text_view,
6735                                      GtkTextIter *iter)
6736 {
6737   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6738   g_return_val_if_fail (iter != NULL, FALSE);
6739
6740   gtk_text_view_ensure_layout (text_view);
6741
6742   return gtk_text_layout_move_iter_to_previous_line (text_view->layout, iter);
6743 }
6744
6745 gboolean
6746 gtk_text_view_forward_display_line_end (GtkTextView *text_view,
6747                                         GtkTextIter *iter)
6748 {
6749   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6750   g_return_val_if_fail (iter != NULL, FALSE);
6751
6752   gtk_text_view_ensure_layout (text_view);
6753
6754   return gtk_text_layout_move_iter_to_line_end (text_view->layout, iter, 1);
6755 }
6756
6757 gboolean
6758 gtk_text_view_backward_display_line_start (GtkTextView *text_view,
6759                                            GtkTextIter *iter)
6760 {
6761   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6762   g_return_val_if_fail (iter != NULL, FALSE);
6763
6764   gtk_text_view_ensure_layout (text_view);
6765
6766   return gtk_text_layout_move_iter_to_line_end (text_view->layout, iter, -1);
6767 }
6768
6769 gboolean
6770 gtk_text_view_starts_display_line (GtkTextView       *text_view,
6771                                    const GtkTextIter *iter)
6772 {
6773   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6774   g_return_val_if_fail (iter != NULL, FALSE);
6775
6776   gtk_text_view_ensure_layout (text_view);
6777
6778   return gtk_text_layout_iter_starts_line (text_view->layout, iter);
6779 }
6780
6781 gboolean
6782 gtk_text_view_move_visually (GtkTextView *text_view,
6783                              GtkTextIter *iter,
6784                              gint         count)
6785 {
6786   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6787   g_return_val_if_fail (iter != NULL, FALSE);
6788
6789   gtk_text_view_ensure_layout (text_view);
6790
6791   return gtk_text_layout_move_iter_visually (text_view->layout, iter, count);
6792 }