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
 268 static void gtk_text_view_mark_set_handler       (GtkTextBuffer     *buffer,
 269                                                   const GtkTextIter *location,
 270                                                   GtkTextMark       *mark,
 271                                                   gpointer           data);
 272 static void gtk_text_view_get_virtual_cursor_pos (GtkTextView       *text_view,
 273                                                   gint              *x,
 274                                                   gint              *y);
 275 static void gtk_text_view_set_virtual_cursor_pos (GtkTextView       *text_view,
 276                                                   gint               x,
 277                                                   gint               y);
 278
 279 static GtkAdjustment* get_hadjustment            (GtkTextView       *text_view);
 280 static GtkAdjustment* get_vadjustment            (GtkTextView       *text_view);
 281
 282 static void gtk_text_view_do_popup               (GtkTextView       *text_view,
 283                                                   GdkEventButton    *event);
 284
 285 static void gtk_text_view_queue_scroll           (GtkTextView   *text_view,
 286                                                   GtkTextMark   *mark,
 287                                                   gdouble        within_margin,
 288                                                   gboolean       use_align,
 289                                                   gdouble        xalign,
 290                                                   gdouble        yalign);
 291
 292 static gboolean gtk_text_view_flush_scroll       (GtkTextView *text_view);
 293 static void     gtk_text_view_update_adjustments (GtkTextView *text_view);
 294
 295 static void gtk_text_view_update_im_spot_location (GtkTextView *text_view);
 296
 297 /* Container methods */
 298 static void gtk_text_view_add    (GtkContainer *container,
 299                                   GtkWidget    *child);
 300 static void gtk_text_view_remove (GtkContainer *container,
 301                                   GtkWidget    *child);
 302 static void gtk_text_view_forall (GtkContainer *container,
 303                                   gboolean      include_internals,
 304                                   GtkCallback   callback,
 305                                   gpointer      callback_data);
 306
 307 /* FIXME probably need the focus methods. */
 308
 309 typedef struct _GtkTextViewChild GtkTextViewChild;
 310
 311 struct _GtkTextViewChild
 312 {
 313   GtkWidget *widget;
 314
 315   GtkTextChildAnchor *anchor;
 316
 317   gint from_top_of_line;
 318   gint from_left_of_buffer;
 319
 320   /* These are ignored if anchor != NULL */
 321   GtkTextWindowType type;
 322   gint x;
 323   gint y;
 324 };
 325
 326 static GtkTextViewChild* text_view_child_new_anchored      (GtkWidget          *child,
 327                                                             GtkTextChildAnchor *anchor,
 328                                                             GtkTextLayout      *layout);
 329 static GtkTextViewChild* text_view_child_new_window        (GtkWidget          *child,
 330                                                             GtkTextWindowType   type,
 331                                                             gint                x,
 332                                                             gint                y);
 333 static void              text_view_child_free              (GtkTextViewChild   *child);
 334 static void              text_view_child_set_parent_window (GtkTextView        *text_view,
 335                                                             GtkTextViewChild   *child);
 336
 337 struct _GtkTextWindow
 338 {
 339   GtkTextWindowType type;
 340   GtkWidget *widget;
 341   GdkWindow *window;
 342   GdkWindow *bin_window;
 343   GtkRequisition requisition;
 344   GdkRectangle allocation;
 345 };
 346
 347 static GtkTextWindow *text_window_new             (GtkTextWindowType  type,
 348                                                    GtkWidget         *widget,
 349                                                    gint               width_request,
 350                                                    gint               height_request);
 351 static void           text_window_free            (GtkTextWindow     *win);
 352 static void           text_window_realize         (GtkTextWindow     *win,
 353                                                    GdkWindow         *parent);
 354 static void           text_window_unrealize       (GtkTextWindow     *win);
 355 static void           text_window_size_allocate   (GtkTextWindow     *win,
 356                                                    GdkRectangle      *rect);
 357 static void           text_window_scroll          (GtkTextWindow     *win,
 358                                                    gint               dx,
 359                                                    gint               dy);
 360 static void           text_window_invalidate_rect (GtkTextWindow     *win,
 361                                                    GdkRectangle      *rect);
 362
 363 static gint           text_window_get_width       (GtkTextWindow     *win);
 364 static gint           text_window_get_height      (GtkTextWindow     *win);
 365 static void           text_window_get_allocation  (GtkTextWindow     *win,
 366                                                    GdkRectangle      *rect);
 367
 368
 369 enum
 370 {
 371   TARGET_STRING,
 372   TARGET_TEXT,
 373   TARGET_COMPOUND_TEXT,
 374   TARGET_UTF8_STRING,
 375   TARGET_TEXT_BUFFER_CONTENTS
 376 };
 377
 378 static GtkTargetEntry target_table[] = {
 379   { "GTK_TEXT_BUFFER_CONTENTS", GTK_TARGET_SAME_APP,
 380     TARGET_TEXT_BUFFER_CONTENTS },
 381   { "UTF8_STRING", 0, TARGET_UTF8_STRING },
 382   { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
 383   { "TEXT", 0, TARGET_TEXT },
 384   { "text/plain", 0, TARGET_STRING },
 385   { "STRING",     0, TARGET_STRING }
 386 };
 387
 388 static GtkContainerClass *parent_class = NULL;
 389 static guint signals[LAST_SIGNAL] = { 0 };
 390
 391 GtkType
 392 gtk_text_view_get_type (void)
 393 {
 394   static GtkType our_type = 0;
 395
 396   if (our_type == 0)
 397     {
 398       static const GtkTypeInfo our_info =
 399       {
 400         "GtkTextView",
 401         sizeof (GtkTextView),
 402         sizeof (GtkTextViewClass),
 403         (GtkClassInitFunc) gtk_text_view_class_init,
 404         (GtkObjectInitFunc) gtk_text_view_init,
 405         /* reserved_1 */ NULL,
 406         /* reserved_2 */ NULL,
 407         (GtkClassInitFunc) NULL
 408       };
 409
 410       our_type = gtk_type_unique (GTK_TYPE_CONTAINER, &our_info);
 411     }
 412
 413   return our_type;
 414 }
 415
 416 static void
 417 add_move_binding (GtkBindingSet  *binding_set,
 418                   guint           keyval,
 419                   guint           modmask,
 420                   GtkMovementStep step,
 421                   gint            count)
 422 {
 423   g_return_if_fail ((modmask & GDK_SHIFT_MASK) == 0);
 424
 425   gtk_binding_entry_add_signal (binding_set, keyval, modmask,
 426                                 "move_cursor", 3,
 427                                 GTK_TYPE_ENUM, step,
 428                                 GTK_TYPE_INT, count,
 429                                 GTK_TYPE_BOOL, FALSE);
 430
 431   /* Selection-extending version */
 432   gtk_binding_entry_add_signal (binding_set, keyval, modmask | GDK_SHIFT_MASK,
 433                                 "move_cursor", 3,
 434                                 GTK_TYPE_ENUM, step,
 435                                 GTK_TYPE_INT, count,
 436                                 GTK_TYPE_BOOL, TRUE);
 437 }
 438
 439 static void
 440 gtk_text_view_class_init (GtkTextViewClass *klass)
 441 {
 442   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 443   GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass);
 444   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 445   GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
 446   GtkBindingSet *binding_set;
 447
 448   parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
 449
 450   /* Default handlers and virtual methods
 451    */
 452   gobject_class->set_property = gtk_text_view_set_property;
 453   gobject_class->get_property = gtk_text_view_get_property;
 454
 455   object_class->destroy = gtk_text_view_destroy;
 456   gobject_class->finalize = gtk_text_view_finalize;
 457
 458   widget_class->realize = gtk_text_view_realize;
 459   widget_class->unrealize = gtk_text_view_unrealize;
 460   widget_class->style_set = gtk_text_view_style_set;
 461   widget_class->direction_changed = gtk_text_view_direction_changed;
 462   widget_class->size_request = gtk_text_view_size_request;
 463   widget_class->size_allocate = gtk_text_view_size_allocate;
 464   widget_class->event = gtk_text_view_event;
 465   widget_class->key_press_event = gtk_text_view_key_press_event;
 466   widget_class->key_release_event = gtk_text_view_key_release_event;
 467   widget_class->button_press_event = gtk_text_view_button_press_event;
 468   widget_class->button_release_event = gtk_text_view_button_release_event;
 469   widget_class->focus_in_event = gtk_text_view_focus_in_event;
 470   widget_class->focus_out_event = gtk_text_view_focus_out_event;
 471   widget_class->motion_notify_event = gtk_text_view_motion_event;
 472   widget_class->expose_event = gtk_text_view_expose_event;
 473
 474   widget_class->drag_begin = gtk_text_view_drag_begin;
 475   widget_class->drag_end = gtk_text_view_drag_end;
 476   widget_class->drag_data_get = gtk_text_view_drag_data_get;
 477   widget_class->drag_data_delete = gtk_text_view_drag_data_delete;
 478
 479   widget_class->drag_leave = gtk_text_view_drag_leave;
 480   widget_class->drag_motion = gtk_text_view_drag_motion;
 481   widget_class->drag_drop = gtk_text_view_drag_drop;
 482   widget_class->drag_data_received = gtk_text_view_drag_data_received;
 483
 484   widget_class->popup_menu = gtk_text_view_popup_menu;
 485
 486   container_class->add = gtk_text_view_add;
 487   container_class->remove = gtk_text_view_remove;
 488   container_class->forall = gtk_text_view_forall;
 489
 490   klass->move_cursor = gtk_text_view_move_cursor;
 491   klass->set_anchor = gtk_text_view_set_anchor;
 492   klass->insert_at_cursor = gtk_text_view_insert_at_cursor;
 493   klass->delete_from_cursor = gtk_text_view_delete_from_cursor;
 494   klass->cut_clipboard = gtk_text_view_cut_clipboard;
 495   klass->copy_clipboard = gtk_text_view_copy_clipboard;
 496   klass->paste_clipboard = gtk_text_view_paste_clipboard;
 497   klass->toggle_overwrite = gtk_text_view_toggle_overwrite;
 498   klass->set_scroll_adjustments = gtk_text_view_set_scroll_adjustments;
 499
 500   /*
 501    * Properties
 502    */
 503
 504   g_object_class_install_property (gobject_class,
 505                                    PROP_PIXELS_ABOVE_LINES,
 506                                    g_param_spec_int ("pixels_above_lines",
 507                                                      _("Pixels Above Lines"),
 508                                                      _("Pixels of blank space above paragraphs"),
 509                                                      0,
 510                                                      G_MAXINT,
 511                                                      0,
 512                                                      G_PARAM_READWRITE));
 513
 514   g_object_class_install_property (gobject_class,
 515                                    PROP_PIXELS_BELOW_LINES,
 516                                    g_param_spec_int ("pixels_below_lines",
 517                                                      _("Pixels Below Lines"),
 518                                                      _("Pixels of blank space below paragraphs"),
 519                                                      0,
 520                                                      G_MAXINT,
 521                                                      0,
 522                                                      G_PARAM_READWRITE));
 523
 524   g_object_class_install_property (gobject_class,
 525                                    PROP_PIXELS_INSIDE_WRAP,
 526                                    g_param_spec_int ("pixels_inside_wrap",
 527                                                      _("Pixels Inside Wrap"),
 528                                                      _("Pixels of blank space between wrapped lines in a paragraph"),
 529                                                      0,
 530                                                      G_MAXINT,
 531                                                      0,
 532                                                      G_PARAM_READWRITE));
 533
 534   g_object_class_install_property (gobject_class,
 535                                    PROP_EDITABLE,
 536                                    g_param_spec_boolean ("editable",
 537                                                          _("Editable"),
 538                                                          _("Whether the text can be modified by the user"),
 539                                                          TRUE,
 540                                                          G_PARAM_READWRITE));
 541
 542   g_object_class_install_property (gobject_class,
 543                                    PROP_WRAP_MODE,
 544                                    g_param_spec_enum ("wrap_mode",
 545                                                       _("Wrap Mode"),
 546                                                       _("Whether to wrap lines never, at word boundaries, or at character boundaries"),
 547                                                       GTK_TYPE_WRAP_MODE,
 548                                                       GTK_WRAP_NONE,
 549                                                       G_PARAM_READWRITE));
 550
 551   g_object_class_install_property (gobject_class,
 552                                    PROP_JUSTIFICATION,
 553                                    g_param_spec_enum ("justification",
 554                                                       _("Justification"),
 555                                                       _("Left, right, or center justification"),
 556                                                       GTK_TYPE_JUSTIFICATION,
 557                                                       GTK_JUSTIFY_LEFT,
 558                                                       G_PARAM_READWRITE));
 559
 560   g_object_class_install_property (gobject_class,
 561                                    PROP_LEFT_MARGIN,
 562                                    g_param_spec_int ("left_margin",
 563                                                      _("Left Margin"),
 564                                                      _("Width of the left margin in pixels"),
 565                                                      0,
 566                                                      G_MAXINT,
 567                                                      0,
 568                                                      G_PARAM_READWRITE));
 569
 570   g_object_class_install_property (gobject_class,
 571                                    PROP_RIGHT_MARGIN,
 572                                    g_param_spec_int ("right_margin",
 573                                                      _("Right Margin"),
 574                                                      _("Width of the right margin in pixels"),
 575                                                      0,
 576                                                      G_MAXINT,
 577                                                      0,
 578                                                      G_PARAM_READWRITE));
 579
 580   g_object_class_install_property (gobject_class,
 581                                    PROP_INDENT,
 582                                    g_param_spec_int ("indent",
 583                                                      _("Indent"),
 584                                                      _("Amount to indent the paragraph, in pixels"),
 585                                                      0,
 586                                                      G_MAXINT,
 587                                                      0,
 588                                                      G_PARAM_READWRITE));
 589
 590   g_object_class_install_property (gobject_class,
 591                                    PROP_TABS,
 592                                    g_param_spec_boxed ("tabs",
 593                                                        _("Tabs"),
 594                                                        _("Custom tabs for this text"),
 595                                                        PANGO_TYPE_TAB_ARRAY,
 596                                                        G_PARAM_READWRITE));
 597
 598   g_object_class_install_property (gobject_class,
 599                                    PROP_CURSOR_VISIBLE,
 600                                    g_param_spec_boolean ("cursor_visible",
 601                                                          _("Cursor Visible"),
 602                                                          _("If the insertion cursor is shown"),
 603                                                          TRUE,
 604                                                          G_PARAM_READWRITE));
 605
 606
 607   /*
 608    * Style properties
 609    */
 610
 611   gtk_widget_class_install_style_property (widget_class,
 612                                            g_param_spec_boxed ("cursor_color",
 613                                                                _("Cursor color"),
 614                                                                _("Color with which to draw insertion cursor"),
 615                                                                GDK_TYPE_COLOR,
 616                                                                G_PARAM_READABLE));
 617
 618
 619   /*
 620    * Signals
 621    */
 622
 623   signals[MOVE_CURSOR] =
 624     gtk_signal_new ("move_cursor",
 625                     GTK_RUN_LAST | GTK_RUN_ACTION,
 626                     GTK_CLASS_TYPE (object_class),
 627                     GTK_SIGNAL_OFFSET (GtkTextViewClass, move_cursor),
 628                     gtk_marshal_VOID__ENUM_INT_BOOLEAN,
 629                     GTK_TYPE_NONE, 3, GTK_TYPE_MOVEMENT_STEP, GTK_TYPE_INT, GTK_TYPE_BOOL);
 630
 631   signals[SET_ANCHOR] =
 632     gtk_signal_new ("set_anchor",
 633                     GTK_RUN_LAST | GTK_RUN_ACTION,
 634                     GTK_CLASS_TYPE (object_class),
 635                     GTK_SIGNAL_OFFSET (GtkTextViewClass, set_anchor),
 636                     gtk_marshal_VOID__VOID,
 637                     GTK_TYPE_NONE, 0);
 638
 639   signals[INSERT_AT_CURSOR] =
 640     gtk_signal_new ("insert_at_cursor",
 641                     GTK_RUN_LAST | GTK_RUN_ACTION,
 642                     GTK_CLASS_TYPE (object_class),
 643                     GTK_SIGNAL_OFFSET (GtkTextViewClass, insert_at_cursor),
 644                     gtk_marshal_VOID__STRING,
 645                     GTK_TYPE_NONE, 1, GTK_TYPE_STRING);
 646
 647   signals[DELETE_FROM_CURSOR] =
 648     gtk_signal_new ("delete_from_cursor",
 649                     GTK_RUN_LAST | GTK_RUN_ACTION,
 650                     GTK_CLASS_TYPE (object_class),
 651                     GTK_SIGNAL_OFFSET (GtkTextViewClass, delete_from_cursor),
 652                     gtk_marshal_VOID__ENUM_INT,
 653                     GTK_TYPE_NONE, 2, GTK_TYPE_DELETE_TYPE, GTK_TYPE_INT);
 654
 655   signals[CUT_CLIPBOARD] =
 656     gtk_signal_new ("cut_clipboard",
 657                     GTK_RUN_LAST | GTK_RUN_ACTION,
 658                     GTK_CLASS_TYPE (object_class),
 659                     GTK_SIGNAL_OFFSET (GtkTextViewClass, cut_clipboard),
 660                     gtk_marshal_VOID__VOID,
 661                     GTK_TYPE_NONE, 0);
 662
 663   signals[COPY_CLIPBOARD] =
 664     gtk_signal_new ("copy_clipboard",
 665                     GTK_RUN_LAST | GTK_RUN_ACTION,
 666                     GTK_CLASS_TYPE (object_class),
 667                     GTK_SIGNAL_OFFSET (GtkTextViewClass, copy_clipboard),
 668                     gtk_marshal_VOID__VOID,
 669                     GTK_TYPE_NONE, 0);
 670
 671   signals[PASTE_CLIPBOARD] =
 672     gtk_signal_new ("paste_clipboard",
 673                     GTK_RUN_LAST | GTK_RUN_ACTION,
 674                     GTK_CLASS_TYPE (object_class),
 675                     GTK_SIGNAL_OFFSET (GtkTextViewClass, paste_clipboard),
 676                     gtk_marshal_VOID__VOID,
 677                     GTK_TYPE_NONE, 0);
 678
 679   signals[TOGGLE_OVERWRITE] =
 680     gtk_signal_new ("toggle_overwrite",
 681                     GTK_RUN_LAST | GTK_RUN_ACTION,
 682                     GTK_CLASS_TYPE (object_class),
 683                     GTK_SIGNAL_OFFSET (GtkTextViewClass, toggle_overwrite),
 684                     gtk_marshal_VOID__VOID,
 685                     GTK_TYPE_NONE, 0);
 686
 687   signals[SET_SCROLL_ADJUSTMENTS] =
 688     gtk_signal_new ("set_scroll_adjustments",
 689                     GTK_RUN_LAST,
 690                     GTK_CLASS_TYPE (object_class),
 691                     GTK_SIGNAL_OFFSET (GtkTextViewClass, set_scroll_adjustments),
 692                     gtk_marshal_VOID__OBJECT_OBJECT,
 693                     GTK_TYPE_NONE, 2, GTK_TYPE_ADJUSTMENT, GTK_TYPE_ADJUSTMENT);
 694   widget_class->set_scroll_adjustments_signal = signals[SET_SCROLL_ADJUSTMENTS];
 695
 696   signals[POPULATE_POPUP] =
 697     gtk_signal_new ("populate_popup",
 698                     GTK_RUN_LAST,
 699                     GTK_CLASS_TYPE (object_class),
 700                     GTK_SIGNAL_OFFSET (GtkTextViewClass, populate_popup),
 701                     gtk_marshal_VOID__OBJECT,
 702                     GTK_TYPE_NONE, 1, GTK_TYPE_MENU);
 703
 704   /*
 705    * Key bindings
 706    */
 707
 708   binding_set = gtk_binding_set_by_class (klass);
 709
 710   /* Moving the insertion point */
 711   add_move_binding (binding_set, GDK_Right, 0,
 712                     GTK_MOVEMENT_VISUAL_POSITIONS, 1);
 713
 714   add_move_binding (binding_set, GDK_KP_Right, 0,
 715                     GTK_MOVEMENT_VISUAL_POSITIONS, 1);
 716
 717   add_move_binding (binding_set, GDK_Left, 0,
 718                     GTK_MOVEMENT_VISUAL_POSITIONS, -1);
 719
 720   add_move_binding (binding_set, GDK_KP_Left, 0,
 721                     GTK_MOVEMENT_VISUAL_POSITIONS, -1);
 722
 723   add_move_binding (binding_set, GDK_f, GDK_CONTROL_MASK,
 724                     GTK_MOVEMENT_LOGICAL_POSITIONS, 1);
 725
 726   add_move_binding (binding_set, GDK_b, GDK_CONTROL_MASK,
 727                     GTK_MOVEMENT_LOGICAL_POSITIONS, -1);
 728
 729   add_move_binding (binding_set, GDK_Right, GDK_CONTROL_MASK,
 730                     GTK_MOVEMENT_WORDS, 1);
 731
 732   add_move_binding (binding_set, GDK_KP_Right, GDK_CONTROL_MASK,
 733                     GTK_MOVEMENT_WORDS, 1);
 734
 735   add_move_binding (binding_set, GDK_Left, GDK_CONTROL_MASK,
 736                     GTK_MOVEMENT_WORDS, -1);
 737
 738   add_move_binding (binding_set, GDK_KP_Left, GDK_CONTROL_MASK,
 739                     GTK_MOVEMENT_WORDS, 1);
 740
 741   /* Eventually we want to move by display lines, not paragraphs */
 742   add_move_binding (binding_set, GDK_Up, 0,
 743                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 744
 745   add_move_binding (binding_set, GDK_KP_Up, 0,
 746                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 747
 748   add_move_binding (binding_set, GDK_Down, 0,
 749                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 750
 751   add_move_binding (binding_set, GDK_KP_Down, 0,
 752                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 753
 754   add_move_binding (binding_set, GDK_p, GDK_CONTROL_MASK,
 755                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 756
 757   add_move_binding (binding_set, GDK_n, GDK_CONTROL_MASK,
 758                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 759
 760   add_move_binding (binding_set, GDK_Up, GDK_CONTROL_MASK,
 761                     GTK_MOVEMENT_PARAGRAPHS, -1);
 762
 763   add_move_binding (binding_set, GDK_KP_Up, GDK_CONTROL_MASK,
 764                     GTK_MOVEMENT_PARAGRAPHS, -1);
 765
 766   add_move_binding (binding_set, GDK_Down, GDK_CONTROL_MASK,
 767                     GTK_MOVEMENT_PARAGRAPHS, 1);
 768
 769   add_move_binding (binding_set, GDK_KP_Down, GDK_CONTROL_MASK,
 770                     GTK_MOVEMENT_PARAGRAPHS, 1);
 771
 772   add_move_binding (binding_set, GDK_a, GDK_CONTROL_MASK,
 773                     GTK_MOVEMENT_PARAGRAPH_ENDS, -1);
 774
 775   add_move_binding (binding_set, GDK_e, GDK_CONTROL_MASK,
 776                     GTK_MOVEMENT_PARAGRAPH_ENDS, 1);
 777
 778   add_move_binding (binding_set, GDK_f, GDK_MOD1_MASK,
 779                     GTK_MOVEMENT_WORDS, 1);
 780
 781   add_move_binding (binding_set, GDK_b, GDK_MOD1_MASK,
 782                     GTK_MOVEMENT_WORDS, -1);
 783
 784   add_move_binding (binding_set, GDK_Home, 0,
 785                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
 786
 787   add_move_binding (binding_set, GDK_KP_Home, 0,
 788                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
 789
 790   add_move_binding (binding_set, GDK_End, 0,
 791                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
 792
 793   add_move_binding (binding_set, GDK_KP_End, 0,
 794                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
 795
 796   add_move_binding (binding_set, GDK_Home, GDK_CONTROL_MASK,
 797                     GTK_MOVEMENT_BUFFER_ENDS, -1);
 798
 799   add_move_binding (binding_set, GDK_KP_Home, GDK_CONTROL_MASK,
 800                     GTK_MOVEMENT_BUFFER_ENDS, -1);
 801
 802   add_move_binding (binding_set, GDK_End, GDK_CONTROL_MASK,
 803                     GTK_MOVEMENT_BUFFER_ENDS, 1);
 804
 805   add_move_binding (binding_set, GDK_KP_End, GDK_CONTROL_MASK,
 806                     GTK_MOVEMENT_BUFFER_ENDS, 1);
 807
 808   add_move_binding (binding_set, GDK_Page_Up, 0,
 809                     GTK_MOVEMENT_PAGES, -1);
 810
 811   add_move_binding (binding_set, GDK_KP_Page_Up, 0,
 812                     GTK_MOVEMENT_PAGES, -1);
 813
 814   add_move_binding (binding_set, GDK_Page_Down, 0,
 815                     GTK_MOVEMENT_PAGES, 1);
 816
 817   add_move_binding (binding_set, GDK_KP_Page_Down, 0,
 818                     GTK_MOVEMENT_PAGES, 1);
 819
 820   /* Setting the cut/paste/copy anchor */
 821   gtk_binding_entry_add_signal (binding_set, GDK_space, GDK_CONTROL_MASK,
 822                                 "set_anchor", 0);
 823   gtk_binding_entry_add_signal (binding_set, GDK_KP_Space, GDK_CONTROL_MASK,
 824                                 "set_anchor", 0);
 825
 826   /* Deleting text */
 827   gtk_binding_entry_add_signal (binding_set, GDK_Delete, 0,
 828                                 "delete_from_cursor", 2,
 829                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 830                                 GTK_TYPE_INT, 1);
 831
 832   gtk_binding_entry_add_signal (binding_set, GDK_KP_Delete, 0,
 833                                 "delete_from_cursor", 2,
 834                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 835                                 GTK_TYPE_INT, 1);
 836
 837   gtk_binding_entry_add_signal (binding_set, GDK_d, GDK_CONTROL_MASK,
 838                                 "delete_from_cursor", 2,
 839                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 840                                 GTK_TYPE_INT, 1);
 841
 842   gtk_binding_entry_add_signal (binding_set, GDK_BackSpace, 0,
 843                                 "delete_from_cursor", 2,
 844                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 845                                 GTK_TYPE_INT, -1);
 846
 847   gtk_binding_entry_add_signal (binding_set, GDK_Delete, GDK_CONTROL_MASK,
 848                                 "delete_from_cursor", 2,
 849                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 850                                 GTK_TYPE_INT, 1);
 851
 852   gtk_binding_entry_add_signal (binding_set, GDK_KP_Delete, GDK_CONTROL_MASK,
 853                                 "delete_from_cursor", 2,
 854                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 855                                 GTK_TYPE_INT, 1);
 856
 857   gtk_binding_entry_add_signal (binding_set, GDK_d, GDK_MOD1_MASK,
 858                                 "delete_from_cursor", 2,
 859                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 860                                 GTK_TYPE_INT, 1);
 861
 862   gtk_binding_entry_add_signal (binding_set, GDK_BackSpace, GDK_CONTROL_MASK,
 863                                 "delete_from_cursor", 2,
 864                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 865                                 GTK_TYPE_INT, -1);
 866
 867   gtk_binding_entry_add_signal (binding_set, GDK_k, GDK_CONTROL_MASK,
 868                                 "delete_from_cursor", 2,
 869                                 GTK_TYPE_ENUM, GTK_DELETE_PARAGRAPH_ENDS,
 870                                 GTK_TYPE_INT, 1);
 871
 872   gtk_binding_entry_add_signal (binding_set, GDK_u, GDK_CONTROL_MASK,
 873                                 "delete_from_cursor", 2,
 874                                 GTK_TYPE_ENUM, GTK_DELETE_PARAGRAPHS,
 875                                 GTK_TYPE_INT, 1);
 876
 877   gtk_binding_entry_add_signal (binding_set, GDK_space, GDK_MOD1_MASK,
 878                                 "delete_from_cursor", 2,
 879                                 GTK_TYPE_ENUM, GTK_DELETE_WHITESPACE,
 880                                 GTK_TYPE_INT, 1);
 881   gtk_binding_entry_add_signal (binding_set, GDK_KP_Space, GDK_MOD1_MASK,
 882                                 "delete_from_cursor", 2,
 883                                 GTK_TYPE_ENUM, GTK_DELETE_WHITESPACE,
 884                                 GTK_TYPE_INT, 1);
 885   gtk_binding_entry_add_signal (binding_set, GDK_space, GDK_MOD1_MASK,
 886                                 "insert_at_cursor", 1,
 887                                 GTK_TYPE_STRING, " ");
 888   gtk_binding_entry_add_signal (binding_set, GDK_KP_Space, GDK_MOD1_MASK,
 889                                 "insert_at_cursor", 1,
 890                                 GTK_TYPE_STRING, " ");
 891
 892   gtk_binding_entry_add_signal (binding_set, GDK_backslash, GDK_MOD1_MASK,
 893                                 "delete_from_cursor", 2,
 894                                 GTK_TYPE_ENUM, GTK_DELETE_WHITESPACE,
 895                                 GTK_TYPE_INT, 1);
 896
 897   /* Cut/copy/paste */
 898
 899   gtk_binding_entry_add_signal (binding_set, GDK_x, GDK_CONTROL_MASK,
 900                                 "cut_clipboard", 0);
 901
 902   gtk_binding_entry_add_signal (binding_set, GDK_w, GDK_CONTROL_MASK,
 903                                 "cut_clipboard", 0);
 904
 905   gtk_binding_entry_add_signal (binding_set, GDK_c, GDK_CONTROL_MASK,
 906                                 "copy_clipboard", 0);
 907
 908   gtk_binding_entry_add_signal (binding_set, GDK_v, GDK_CONTROL_MASK,
 909                                 "paste_clipboard", 0);
 910
 911   gtk_binding_entry_add_signal (binding_set, GDK_y, GDK_CONTROL_MASK,
 912                                 "paste_clipboard", 0);
 913
 914   /* Overwrite */
 915   gtk_binding_entry_add_signal (binding_set, GDK_Insert, 0,
 916                                 "toggle_overwrite", 0);
 917   gtk_binding_entry_add_signal (binding_set, GDK_KP_Insert, 0,
 918                                 "toggle_overwrite", 0);
 919 }
 920
 921 void
 922 gtk_text_view_init (GtkTextView *text_view)
 923 {
 924   GtkWidget *widget;
 925
 926   widget = GTK_WIDGET (text_view);
 927
 928   GTK_WIDGET_SET_FLAGS (widget, GTK_CAN_FOCUS);
 929
 930   /* Set up default style */
 931   text_view->wrap_mode = GTK_WRAP_NONE;
 932   text_view->pixels_above_lines = 0;
 933   text_view->pixels_below_lines = 0;
 934   text_view->pixels_inside_wrap = 0;
 935   text_view->justify = GTK_JUSTIFY_LEFT;
 936   text_view->left_margin = 0;
 937   text_view->right_margin = 0;
 938   text_view->indent = 0;
 939   text_view->tabs = NULL;
 940   text_view->editable = TRUE;
 941
 942   gtk_drag_dest_set (widget,
 943                      0,
 944                      target_table, G_N_ELEMENTS (target_table),
 945                      GDK_ACTION_COPY | GDK_ACTION_MOVE);
 946
 947   text_view->virtual_cursor_x = -1;
 948   text_view->virtual_cursor_y = -1;
 949
 950   /* This object is completely private. No external entity can gain a reference
 951    * to it; so we create it here and destroy it in finalize ().
 952    */
 953   text_view->im_context = gtk_im_multicontext_new ();
 954
 955   g_signal_connect (G_OBJECT (text_view->im_context), "commit",
 956                     G_CALLBACK (gtk_text_view_commit_handler), text_view);
 957
 958   g_signal_connect (G_OBJECT (text_view->im_context), "preedit_changed",
 959                     G_CALLBACK (gtk_text_view_preedit_changed_handler), text_view);
 960
 961   text_view->cursor_visible = TRUE;
 962
 963   text_view->text_window = text_window_new (GTK_TEXT_WINDOW_TEXT,
 964                                             widget, 200, 200);
 965
 966   text_view->drag_start_x = -1;
 967   text_view->drag_start_y = -1;
 968
 969   text_view->pending_place_cursor_button = 0;
 970 }
 971
 972 /**
 973  * gtk_text_view_new:
 974  *
 975  * Creates a new #GtkTextView. If you don't call gtk_text_view_set_buffer()
 976  * before using the text view, an empty default buffer will be created
 977  * for you. Get the buffer with gtk_text_view_get_buffer(). If you want
 978  * to specify your own buffer, consider gtk_text_view_new_with_buffer().
 979  *
 980  * Return value: a new #GtkTextView
 981  **/
 982 GtkWidget*
 983 gtk_text_view_new (void)
 984 {
 985   return GTK_WIDGET (gtk_type_new (gtk_text_view_get_type ()));
 986 }
 987
 988 /**
 989  * gtk_text_view_new_with_buffer:
 990  * @buffer: a #GtkTextBuffer
 991  *
 992  * Creates a new #GtkTextView widget displaying the buffer
 993  * @buffer. One buffer can be shared among many widgets.
 994  * @buffer may be NULL to create a default buffer, in which case
 995  * this function is equivalent to gtk_text_view_new(). The
 996  * text view adds its own reference count to the buffer; it does not
 997  * take over an existing reference.
 998  *
 999  * Return value: a new #GtkTextView.
1000  **/
1001 GtkWidget*
1002 gtk_text_view_new_with_buffer (GtkTextBuffer *buffer)
1003 {
1004   GtkTextView *text_view;
1005
1006   text_view = (GtkTextView*)gtk_text_view_new ();
1007
1008   gtk_text_view_set_buffer (text_view, buffer);
1009
1010   return GTK_WIDGET (text_view);
1011 }
1012
1013 /**
1014  * gtk_text_view_set_buffer:
1015  * @text_view: a #GtkTextView
1016  * @buffer: a #GtkTextBuffer
1017  *
1018  * Sets @buffer as the buffer being displayed by @text_view. The previous
1019  * buffer displayed by the text view is unreferenced, and a reference is
1020  * added to @buffer. If you owned a reference to @buffer before passing it
1021  * to this function, you must remove that reference yourself; #GtkTextView
1022  * will not "adopt" it.
1023  *
1024  **/
1025 void
1026 gtk_text_view_set_buffer (GtkTextView   *text_view,
1027                           GtkTextBuffer *buffer)
1028 {
1029   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1030   g_return_if_fail (buffer == NULL || GTK_IS_TEXT_BUFFER (buffer));
1031
1032   if (text_view->buffer == buffer)
1033     return;
1034
1035   if (text_view->buffer != NULL)
1036     {
1037       /* Destroy all anchored children */
1038       GSList *tmp_list;
1039       GSList *copy;
1040
1041       copy = g_slist_copy (text_view->children);
1042       tmp_list = copy;
1043       while (tmp_list != NULL)
1044         {
1045           GtkTextViewChild *vc = tmp_list->data;
1046
1047           if (vc->anchor)
1048             {
1049               gtk_widget_destroy (vc->widget);
1050               /* vc may now be invalid! */
1051             }
1052
1053           tmp_list = g_slist_next (tmp_list);
1054         }
1055
1056       g_slist_free (copy);
1057
1058       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->buffer),
1059                                             gtk_text_view_mark_set_handler, text_view);
1060       g_object_unref (G_OBJECT (text_view->buffer));
1061       text_view->dnd_mark = NULL;
1062
1063       if (GTK_WIDGET_REALIZED (text_view))
1064         gtk_text_buffer_remove_selection_clipboard (text_view->buffer,
1065                                                     gtk_clipboard_get (GDK_SELECTION_PRIMARY));
1066     }
1067
1068   text_view->buffer = buffer;
1069
1070   if (buffer != NULL)
1071     {
1072       GtkTextIter start;
1073
1074       g_object_ref (G_OBJECT (buffer));
1075
1076       if (text_view->layout)
1077         gtk_text_layout_set_buffer (text_view->layout, buffer);
1078
1079       gtk_text_buffer_get_iter_at_offset (text_view->buffer, &start, 0);
1080
1081       text_view->dnd_mark = gtk_text_buffer_create_mark (text_view->buffer,
1082                                                          "gtk_drag_target",
1083                                                          &start, FALSE);
1084
1085       text_view->first_para_mark = gtk_text_buffer_create_mark (text_view->buffer,
1086                                                                 NULL,
1087                                                                 &start, TRUE);
1088
1089       text_view->first_para_pixels = 0;
1090
1091       g_signal_connect (G_OBJECT (text_view->buffer), "mark_set",
1092                         G_CALLBACK (gtk_text_view_mark_set_handler), text_view);
1093
1094       if (GTK_WIDGET_REALIZED (text_view))
1095         gtk_text_buffer_add_selection_clipboard (text_view->buffer,
1096                                                  gtk_clipboard_get (GDK_SELECTION_PRIMARY));
1097     }
1098
1099   if (GTK_WIDGET_VISIBLE (text_view))
1100     gtk_widget_queue_draw (GTK_WIDGET (text_view));
1101 }
1102
1103 static GtkTextBuffer*
1104 get_buffer (GtkTextView *text_view)
1105 {
1106   if (text_view->buffer == NULL)
1107     {
1108       GtkTextBuffer *b;
1109       b = gtk_text_buffer_new (NULL);
1110       gtk_text_view_set_buffer (text_view, b);
1111       g_object_unref (G_OBJECT (b));
1112     }
1113
1114   return text_view->buffer;
1115 }
1116
1117 /**
1118  * gtk_text_view_get_buffer:
1119  * @text_view: a #GtkTextView
1120  *
1121  * Returns the #GtkTextBuffer being displayed by this text view.
1122  * The reference count on the buffer is not incremented; the caller
1123  * of this function won't own a new reference.
1124  *
1125  * Return value: a #GtkTextBuffer
1126  **/
1127 GtkTextBuffer*
1128 gtk_text_view_get_buffer (GtkTextView *text_view)
1129 {
1130   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
1131
1132   return get_buffer (text_view);
1133 }
1134
1135 /**
1136  * gtk_text_view_get_iter_at_location:
1137  * @text_view: a #GtkTextView
1138  * @iter: a #GtkTextIter
1139  * @x: x position, in buffer coordinates
1140  * @y: y position, in buffer coordinates
1141  *
1142  * Retrieves the iterator at buffer coordinates @x and @y. Buffer
1143  * coordinates are coordinates for the entire buffer, not just the
1144  * currently-displayed portion.  If you have coordinates from an
1145  * event, you have to convert those to buffer coordinates with
1146  * gtk_text_view_window_to_buffer_coords().
1147  *
1148  **/
1149 void
1150 gtk_text_view_get_iter_at_location (GtkTextView *text_view,
1151                                     GtkTextIter *iter,
1152                                     gint         x,
1153                                     gint         y)
1154 {
1155   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1156   g_return_if_fail (iter != NULL);
1157   g_return_if_fail (text_view->layout != NULL);
1158
1159   gtk_text_layout_get_iter_at_pixel (text_view->layout,
1160                                      iter,
1161                                      x,
1162                                      y);
1163 }
1164
1165 /**
1166  * gtk_text_view_get_iter_location:
1167  * @text_view: a #GtkTextView
1168  * @iter: a #GtkTextIter
1169  * @location: bounds of the character at @iter
1170  *
1171  * Gets a rectangle which roughly contains the character at @iter.
1172  * The rectangle position is in buffer coordinates; use
1173  * gtk_text_view_buffer_to_window_coords() to convert these
1174  * coordinates to coordinates for one of the windows in the text view.
1175  *
1176  **/
1177 void
1178 gtk_text_view_get_iter_location (GtkTextView       *text_view,
1179                                  const GtkTextIter *iter,
1180                                  GdkRectangle      *location)
1181 {
1182   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1183   g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
1184
1185   gtk_text_layout_get_iter_location (text_view->layout, iter, location);
1186 }
1187
1188 /**
1189  * gtk_text_view_get_line_yrange:
1190  * @text_view: a #GtkTextView
1191  * @iter: a #GtkTextIter
1192  * @y: return location for a y coordinate
1193  * @height: return location for a height
1194  *
1195  * Gets the y coordinate of the top of the line containing @iter,
1196  * and the height of the line. The coordinate is a buffer coordinate;
1197  * convert to window coordinates with gtk_text_view_buffer_to_window_coords().
1198  *
1199  **/
1200 void
1201 gtk_text_view_get_line_yrange (GtkTextView       *text_view,
1202                                const GtkTextIter *iter,
1203                                gint              *y,
1204                                gint              *height)
1205 {
1206   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1207   g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
1208
1209   gtk_text_layout_get_line_yrange (text_view->layout,
1210                                    iter,
1211                                    y,
1212                                    height);
1213 }
1214
1215 /**
1216  * gtk_text_view_get_line_at_y:
1217  * @text_view: a #GtkTextView
1218  * @target_iter: a #GtkTextIter
1219  * @y: a y coordinate
1220  * @line_top: return location for top coordinate of the line
1221  *
1222  * Gets the #GtkTextIter at the start of the line containing
1223  * the coordinate @y. @y is in buffer coordinates, convert from
1224  * window coordinates with gtk_text_view_window_to_buffer_coords().
1225  * If non-%NULL, @line_top will be filled with the coordinate of the top
1226  * edge of the line.
1227  **/
1228 void
1229 gtk_text_view_get_line_at_y (GtkTextView *text_view,
1230                              GtkTextIter *target_iter,
1231                              gint         y,
1232                              gint        *line_top)
1233 {
1234   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1235
1236   gtk_text_layout_get_line_at_y (text_view->layout,
1237                                  target_iter,
1238                                  y,
1239                                  line_top);
1240 }
1241
1242 static gboolean
1243 set_adjustment_clamped (GtkAdjustment *adj, gdouble val)
1244 {
1245   DV (g_print ("  Setting adj to raw value %g\n", val));
1246
1247   /* We don't really want to clamp to upper; we want to clamp to
1248      upper - page_size which is the highest value the scrollbar
1249      will let us reach. */
1250   if (val > (adj->upper - adj->page_size))
1251     val = adj->upper - adj->page_size;
1252
1253   if (val < adj->lower)
1254     val = adj->lower;
1255
1256   if (val != adj->value)
1257     {
1258       DV (g_print ("  Setting adj to clamped value %g\n", val));
1259       gtk_adjustment_set_value (adj, val);
1260       return TRUE;
1261     }
1262   else
1263     return FALSE;
1264 }
1265
1266 /**
1267  * gtk_text_view_scroll_to_iter:
1268  * @text_view: a #GtkTextView
1269  * @iter: a #GtkTextIter
1270  * @within_margin: margin as a [0.0,0.5) fraction of screen size
1271  * @use_align: whether to use alignment arguments (if %FALSE, just get the mark onscreen)
1272  * @xalign: horizontal alignment of mark within visible area.
1273  * @yalign: vertical alignment of mark within visible area
1274  *
1275  * Scrolls @text_view so that @iter is on the screen in the position
1276  * indicated by @xalign and @yalign. An alignment of 0.0 indicates
1277  * left or top, 1.0 indicates right or bottom, 0.5 means center. If @use_align
1278  * is %FALSE, the text scrolls the minimal distance to get the mark onscreen,
1279  * possibly not scrolling at all. The effective screen for purposes
1280  * of this function is reduced by a margin of size @within_margin.
1281  * NOTE: This function uses the currently-computed height of the
1282  * lines in the text buffer. Note that line heights are computed
1283  * in an idle handler; so this function may not have the desired effect
1284  * if it's called before the height computations. To avoid oddness,
1285  * consider using gtk_text_view_scroll_to_mark() which saves a point
1286  * to be scrolled to after line validation.
1287  *
1288  * Return value: %TRUE if scrolling occurred
1289  **/
1290 gboolean
1291 gtk_text_view_scroll_to_iter (GtkTextView   *text_view,
1292                               GtkTextIter   *iter,
1293                               gdouble        within_margin,
1294                               gboolean       use_align,
1295                               gdouble        xalign,
1296                               gdouble        yalign)
1297 {
1298   GdkRectangle rect;
1299   GdkRectangle screen;
1300   gint screen_bottom;
1301   gint screen_right;
1302   gint scroll_dest;
1303   GtkWidget *widget;
1304   gboolean retval = FALSE;
1305   gint scroll_inc;
1306   gint screen_xoffset, screen_yoffset;
1307   gint current_x_scroll, current_y_scroll;
1308
1309   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1310   g_return_val_if_fail (iter != NULL, FALSE);
1311   g_return_val_if_fail (within_margin >= 0.0 && within_margin < 0.5, FALSE);
1312   g_return_val_if_fail (xalign >= 0.0 && xalign <= 1.0, FALSE);
1313   g_return_val_if_fail (yalign >= 0.0 && yalign <= 1.0, FALSE);
1314
1315   widget = GTK_WIDGET (text_view);
1316
1317   DV(g_print(G_STRLOC"\n"));
1318
1319   if (!GTK_WIDGET_MAPPED (widget))
1320     {
1321       g_warning ("gtk_text_view_scroll_to_iter(): calling this function before showing the GtkTextView doesn't make sense, maybe try gtk_text_view_scroll_to_mark() instead");
1322       return FALSE;
1323     }
1324
1325   gtk_text_layout_get_iter_location (text_view->layout,
1326                                      iter,
1327                                      &rect);
1328
1329   DV (g_print (" target rect %d,%d  %d x %d\n", rect.x, rect.y, rect.width, rect.height));
1330
1331   current_x_scroll = text_view->xoffset;
1332   current_y_scroll = text_view->yoffset;
1333
1334   screen.x = current_x_scroll;
1335   screen.y = current_y_scroll;
1336   screen.width = SCREEN_WIDTH (widget);
1337   screen.height = SCREEN_HEIGHT (widget);
1338
1339   screen_xoffset = screen.width * within_margin;
1340   screen_yoffset = screen.height * within_margin;
1341
1342   screen.x += screen_xoffset;
1343   screen.y += screen_yoffset;
1344   screen.width -= screen_xoffset * 2;
1345   screen.height -= screen_yoffset * 2;
1346
1347   /* paranoia check */
1348   if (screen.width < 1)
1349     screen.width = 1;
1350   if (screen.height < 1)
1351     screen.height = 1;
1352
1353   screen_right = screen.x + screen.width;
1354   screen_bottom = screen.y + screen.height;
1355
1356   /* The alignment affects the point in the target character that we
1357    * choose to align. If we're doing right/bottom alignment, we align
1358    * the right/bottom edge of the character the mark is at; if we're
1359    * doing left/top we align the left/top edge of the character; if
1360    * we're doing center alignment we align the center of the
1361    * character.
1362    */
1363
1364   /* Vertical scroll */
1365
1366   scroll_inc = 0;
1367   scroll_dest = current_y_scroll;
1368
1369   if (use_align)
1370     {
1371       scroll_dest = rect.y + (rect.height * yalign) - (screen.height * yalign);
1372
1373       /* if scroll_dest < screen.y, we move a negative increment (up),
1374        * else a positive increment (down)
1375        */
1376       scroll_inc = scroll_dest - screen.y + screen_yoffset;
1377     }
1378   else
1379     {
1380       /* move minimum to get onscreen */
1381       if (rect.y < screen.y)
1382         {
1383           scroll_dest = rect.y;
1384           scroll_inc = scroll_dest - screen.y - screen_yoffset;
1385         }
1386       else if ((rect.y + rect.height) > screen_bottom)
1387         {
1388           scroll_dest = rect.y + rect.height;
1389           scroll_inc = scroll_dest - screen_bottom + screen_yoffset;
1390         }
1391     }
1392
1393   if (scroll_inc != 0)
1394     {
1395       retval = set_adjustment_clamped (get_vadjustment (text_view),
1396                                        current_y_scroll + scroll_inc);
1397
1398       DV (g_print (" vert increment %d\n", scroll_inc));
1399     }
1400
1401   /* Horizontal scroll */
1402
1403   scroll_inc = 0;
1404   scroll_dest = current_x_scroll;
1405
1406   if (use_align)
1407     {
1408       scroll_dest = rect.x + (rect.width * xalign) - (screen.width * xalign);
1409
1410       /* if scroll_dest < screen.y, we move a negative increment (left),
1411        * else a positive increment (right)
1412        */
1413       scroll_inc = scroll_dest - screen.x + screen_xoffset;
1414     }
1415   else
1416     {
1417       /* move minimum to get onscreen */
1418       if (rect.x < screen.x)
1419         {
1420           scroll_dest = rect.x;
1421           scroll_inc = scroll_dest - screen.x - screen_xoffset;
1422         }
1423       else if ((rect.x + rect.width) > screen_right)
1424         {
1425           scroll_dest = rect.x + rect.width;
1426           scroll_inc = scroll_dest - screen_right + screen_xoffset;
1427         }
1428     }
1429
1430   if (scroll_inc != 0)
1431     {
1432       retval = set_adjustment_clamped (get_hadjustment (text_view),
1433                                        current_x_scroll + scroll_inc);
1434
1435       DV (g_print (" horiz increment %d\n", scroll_inc));
1436     }
1437
1438   if (retval)
1439     DV(g_print (">Actually scrolled ("G_STRLOC")\n"));
1440   else
1441     DV(g_print (">Didn't end up scrolling ("G_STRLOC")\n"));
1442
1443   return retval;
1444 }
1445
1446 static void
1447 free_pending_scroll (GtkTextPendingScroll *scroll)
1448 {
1449   if (!gtk_text_mark_get_deleted (scroll->mark))
1450     gtk_text_buffer_delete_mark (gtk_text_mark_get_buffer (scroll->mark),
1451                                  scroll->mark);
1452   g_object_unref (G_OBJECT (scroll->mark));
1453   g_free (scroll);
1454 }
1455
1456 static void
1457 gtk_text_view_queue_scroll (GtkTextView   *text_view,
1458                             GtkTextMark   *mark,
1459                             gdouble        within_margin,
1460                             gboolean       use_align,
1461                             gdouble        xalign,
1462                             gdouble        yalign)
1463 {
1464   GtkTextIter iter;
1465   GtkTextPendingScroll *scroll;
1466
1467   DV(g_print(G_STRLOC"\n"));
1468
1469   scroll = g_new (GtkTextPendingScroll, 1);
1470
1471   scroll->within_margin = within_margin;
1472   scroll->use_align = use_align;
1473   scroll->xalign = xalign;
1474   scroll->yalign = yalign;
1475
1476   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
1477
1478   scroll->mark = gtk_text_buffer_create_mark (get_buffer (text_view),
1479                                               NULL,
1480                                               &iter,
1481                                               gtk_text_mark_get_left_gravity (mark));
1482
1483   g_object_ref (G_OBJECT (scroll->mark));
1484
1485   if (text_view->pending_scroll)
1486     free_pending_scroll (text_view->pending_scroll);
1487
1488   text_view->pending_scroll = scroll;
1489 }
1490
1491 static gboolean
1492 gtk_text_view_flush_scroll (GtkTextView *text_view)
1493 {
1494   GtkTextIter iter;
1495   GtkTextPendingScroll *scroll;
1496   gboolean retval;
1497
1498   DV(g_print(G_STRLOC"\n"));
1499
1500   if (text_view->pending_scroll == NULL)
1501     return FALSE;
1502
1503   scroll = text_view->pending_scroll;
1504
1505   /* avoid recursion */
1506   text_view->pending_scroll = NULL;
1507
1508   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, scroll->mark);
1509
1510   /* Validate arbitrary area around the scroll destination, so the adjustment
1511    * can meaningfully point into that area
1512    */
1513   DV(g_print (">Validating scroll destination ("G_STRLOC")\n"));
1514   gtk_text_layout_validate_yrange (text_view->layout, &iter, -300, 300);
1515
1516   DV(g_print (">Done validating scroll destination ("G_STRLOC")\n"));
1517
1518   /* Ensure we have updated width/height */
1519   gtk_text_view_update_adjustments (text_view);
1520
1521   retval = gtk_text_view_scroll_to_iter (text_view,
1522                                          &iter,
1523                                          scroll->within_margin,
1524                                          scroll->use_align,
1525                                          scroll->xalign,
1526                                          scroll->yalign);
1527
1528   free_pending_scroll (scroll);
1529
1530   return retval;
1531 }
1532
1533 static void
1534 gtk_text_view_set_adjustment_upper (GtkAdjustment *adj, gdouble upper)
1535 {
1536   if (upper != adj->upper)
1537     {
1538       gdouble min = MAX (0.0, upper - adj->page_size);
1539       gboolean value_changed = FALSE;
1540
1541       adj->upper = upper;
1542
1543       if (adj->value > min)
1544         {
1545           adj->value = min;
1546           value_changed = TRUE;
1547         }
1548
1549       gtk_signal_emit_by_name (GTK_OBJECT (adj), "changed");
1550       DV(g_print(">Changed adj upper to %g ("G_STRLOC")\n", upper));
1551
1552       if (value_changed)
1553         {
1554           DV(g_print(">Changed adj value because upper decreased ("G_STRLOC")\n"));
1555           gtk_signal_emit_by_name (GTK_OBJECT (adj), "value_changed");
1556         }
1557     }
1558 }
1559
1560 static void
1561 gtk_text_view_update_adjustments (GtkTextView *text_view)
1562 {
1563   gint width = 0, height = 0;
1564
1565   DV(g_print(">Updating adjustments ("G_STRLOC")\n"));
1566
1567   gtk_text_layout_get_size (text_view->layout, &width, &height);
1568
1569   if (text_view->width != width || text_view->height != height)
1570     {
1571       text_view->width = width;
1572       text_view->height = height;
1573
1574       gtk_text_view_set_adjustment_upper (get_hadjustment (text_view),
1575                                           MAX (SCREEN_WIDTH (text_view), width));
1576       gtk_text_view_set_adjustment_upper (get_vadjustment (text_view),
1577                                           MAX (SCREEN_HEIGHT (text_view), height));
1578
1579       /* hadj/vadj exist since we called get_hadjustment/get_vadjustment above */
1580
1581       /* Set up the step sizes; we'll say that a page is
1582          our allocation minus one step, and a step is
1583          1/10 of our allocation. */
1584       text_view->hadjustment->step_increment =
1585         SCREEN_WIDTH (text_view) / 10.0;
1586       text_view->hadjustment->page_increment =
1587         SCREEN_WIDTH (text_view) * 0.9;
1588
1589       text_view->vadjustment->step_increment =
1590         SCREEN_HEIGHT (text_view) / 10.0;
1591       text_view->vadjustment->page_increment =
1592         SCREEN_HEIGHT (text_view) * 0.9;
1593
1594       gtk_signal_emit_by_name (GTK_OBJECT (get_hadjustment (text_view)), "changed");
1595       gtk_signal_emit_by_name (GTK_OBJECT (get_hadjustment (text_view)), "changed");
1596     }
1597 }
1598
1599 static void
1600 gtk_text_view_update_layout_width (GtkTextView *text_view)
1601 {
1602   DV(g_print(">Updating layout width ("G_STRLOC")\n"));
1603
1604   gtk_text_view_ensure_layout (text_view);
1605
1606   gtk_text_layout_set_screen_width (text_view->layout,
1607                                     SCREEN_WIDTH (text_view));
1608 }
1609
1610 static void
1611 gtk_text_view_update_im_spot_location (GtkTextView *text_view)
1612 {
1613   GdkRectangle area;
1614   gint cursor_x_pos, cursor_y_pos;
1615
1616   if (text_view->layout == NULL)
1617     return;
1618
1619   gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, &cursor_y_pos);
1620
1621   area.x = cursor_x_pos;
1622   area.y = cursor_y_pos;
1623   area.width = area.height = 0;
1624
1625   gtk_im_context_set_cursor_location (text_view->im_context, &area);
1626 }
1627
1628 /**
1629  * gtk_text_view_scroll_to_mark:
1630  * @text_view: a #GtkTextView
1631  * @mark: a #GtkTextMark
1632  * @within_margin: margin as a [0.0,0.5) fraction of screen size
1633  * @use_align: whether to use alignment arguments (if %FALSE, just get the mark onscreen)
1634  * @xalign: horizontal alignment of mark within visible area.
1635  * @yalign: vertical alignment of mark within visible area
1636  *
1637  * Scrolls @text_view so that @mark is on the screen in the position
1638  * indicated by @xalign and @yalign. An alignment of 0.0 indicates
1639  * left or top, 1.0 indicates right or bottom, 0.5 means center. If @use_align
1640  * is %FALSE, the text scrolls the minimal distance to get the mark onscreen,
1641  * possibly not scrolling at all. The effective screen for purposes
1642  * of this function is reduced by a margin of size @within_margin.
1643  *
1644  **/
1645 void
1646 gtk_text_view_scroll_to_mark (GtkTextView *text_view,
1647                               GtkTextMark *mark,
1648                               gdouble      within_margin,
1649                               gboolean     use_align,
1650                               gdouble      xalign,
1651                               gdouble      yalign)
1652 {
1653   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1654   g_return_if_fail (GTK_IS_TEXT_MARK (mark));
1655   g_return_if_fail (within_margin >= 0.0 && within_margin < 0.5);
1656   g_return_if_fail (xalign >= 0.0 && xalign <= 1.0);
1657   g_return_if_fail (yalign >= 0.0 && yalign <= 1.0);
1658
1659   gtk_text_view_queue_scroll (text_view, mark,
1660                               within_margin,
1661                               use_align,
1662                               xalign,
1663                               yalign);
1664
1665   /* If no validation is pending, we need to go ahead and force an
1666    * immediate scroll.
1667    */
1668   if (text_view->layout &&
1669       gtk_text_layout_is_valid (text_view->layout))
1670     gtk_text_view_flush_scroll (text_view);
1671 }
1672
1673 void
1674 gtk_text_view_scroll_mark_onscreen (GtkTextView *text_view,
1675                                     GtkTextMark *mark)
1676 {
1677   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1678   g_return_if_fail (GTK_IS_TEXT_MARK (mark));
1679
1680   gtk_text_view_scroll_to_mark (text_view, mark, 0.0, FALSE, 0.0, 0.0);
1681 }
1682
1683 static gboolean
1684 clamp_iter_onscreen (GtkTextView *text_view, GtkTextIter *iter)
1685 {
1686   GdkRectangle visible_rect;
1687   gtk_text_view_get_visible_rect (text_view, &visible_rect);
1688
1689   return gtk_text_layout_clamp_iter_to_vrange (text_view->layout, iter,
1690                                                visible_rect.y,
1691                                                visible_rect.y + visible_rect.height);
1692 }
1693
1694 /**
1695  * gtk_text_view_move_mark_onscreen:
1696  * @text_view: a #GtkTextView
1697  * @mark: a #GtkTextMark
1698  *
1699  * Moves a mark within the buffer so that it's
1700  * located within the currently-visible text area.
1701  *
1702  * Return value: %TRUE if the mark moved (wasn't already onscreen)
1703  **/
1704 gboolean
1705 gtk_text_view_move_mark_onscreen (GtkTextView *text_view,
1706                                   GtkTextMark *mark)
1707 {
1708   GtkTextIter iter;
1709
1710   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1711   g_return_val_if_fail (mark != NULL, FALSE);
1712
1713   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
1714
1715   if (clamp_iter_onscreen (text_view, &iter))
1716     {
1717       gtk_text_buffer_move_mark (get_buffer (text_view), mark, &iter);
1718       return TRUE;
1719     }
1720   else
1721     return FALSE;
1722 }
1723
1724 /**
1725  * gtk_text_view_get_visible_rect:
1726  * @text_view: a #GtkTextView
1727  * @visible_rect: rectangle to fill
1728  *
1729  * Fills @visible_rect with the currently-visible
1730  * region of the buffer, in buffer coordinates. Convert to window coordinates
1731  * with gtk_text_view_buffer_to_window_coords().
1732  **/
1733 void
1734 gtk_text_view_get_visible_rect (GtkTextView  *text_view,
1735                                 GdkRectangle *visible_rect)
1736 {
1737   GtkWidget *widget;
1738
1739   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1740
1741   widget = GTK_WIDGET (text_view);
1742
1743   if (visible_rect)
1744     {
1745       visible_rect->x = text_view->xoffset;
1746       visible_rect->y = text_view->yoffset;
1747       visible_rect->width = SCREEN_WIDTH (widget);
1748       visible_rect->height = SCREEN_HEIGHT (widget);
1749
1750       DV(g_print(" visible rect: %d,%d %d x %d\n",
1751                  visible_rect->x,
1752                  visible_rect->y,
1753                  visible_rect->width,
1754                  visible_rect->height));
1755     }
1756 }
1757
1758 /**
1759  * gtk_text_view_set_wrap_mode:
1760  * @text_view: a #GtkTextView
1761  * @wrap_mode: a #GtkWrapMode
1762  *
1763  * Sets the line wrapping for the view.
1764  **/
1765 void
1766 gtk_text_view_set_wrap_mode (GtkTextView *text_view,
1767                              GtkWrapMode  wrap_mode)
1768 {
1769   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1770
1771   if (text_view->wrap_mode != wrap_mode)
1772     {
1773       text_view->wrap_mode = wrap_mode;
1774
1775       if (text_view->layout)
1776         {
1777           text_view->layout->default_style->wrap_mode = wrap_mode;
1778           gtk_text_layout_default_style_changed (text_view->layout);
1779         }
1780     }
1781
1782   g_object_notify (G_OBJECT (text_view), "wrap_mode");
1783 }
1784
1785 /**
1786  * gtk_text_view_get_wrap_mode:
1787  * @text_view: a #GtkTextView
1788  *
1789  * Gets the line wrapping for the view.
1790  *
1791  * Return value: the line wrap setting
1792  **/
1793 GtkWrapMode
1794 gtk_text_view_get_wrap_mode (GtkTextView *text_view)
1795 {
1796   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_WRAP_NONE);
1797
1798   return text_view->wrap_mode;
1799 }
1800
1801 /**
1802  * gtk_text_view_set_editable:
1803  * @text_view: a #GtkTextView
1804  * @setting: whether it's editable
1805  *
1806  * Sets the default editability of the #GtkTextView. You can override
1807  * this default setting with tags in the buffer, using the "editable"
1808  * attribute of tags.
1809  **/
1810 void
1811 gtk_text_view_set_editable (GtkTextView *text_view,
1812                             gboolean     setting)
1813 {
1814   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1815
1816   if (text_view->editable != setting)
1817     {
1818       text_view->editable = setting;
1819
1820       if (text_view->layout)
1821         {
1822           text_view->layout->default_style->editable = text_view->editable;
1823           gtk_text_layout_default_style_changed (text_view->layout);
1824         }
1825     }
1826
1827   g_object_notify (G_OBJECT (text_view), "editable");
1828 }
1829
1830 /**
1831  * gtk_text_view_get_editable:
1832  * @text_view: a #GtkTextView
1833  *
1834  * Returns the default editability of the #GtkTextView. Tags in the
1835  * buffer may override this setting for some ranges of text.
1836  *
1837  * Return value: whether text is editable by default
1838  **/
1839 gboolean
1840 gtk_text_view_get_editable (GtkTextView *text_view)
1841 {
1842   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1843
1844   return text_view->editable;
1845 }
1846
1847 void
1848 gtk_text_view_set_pixels_above_lines (GtkTextView *text_view,
1849                                       gint         pixels_above_lines)
1850 {
1851   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1852
1853   if (text_view->pixels_above_lines != pixels_above_lines)
1854     {
1855       text_view->pixels_above_lines = pixels_above_lines;
1856
1857       if (text_view->layout)
1858         {
1859           text_view->layout->default_style->pixels_above_lines = pixels_above_lines;
1860           gtk_text_layout_default_style_changed (text_view->layout);
1861         }
1862     }
1863
1864   g_object_notify (G_OBJECT (text_view), "pixels_above_lines");
1865 }
1866
1867 gint
1868 gtk_text_view_get_pixels_above_lines (GtkTextView *text_view)
1869 {
1870   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1871
1872   return text_view->pixels_above_lines;
1873 }
1874
1875 void
1876 gtk_text_view_set_pixels_below_lines (GtkTextView *text_view,
1877                                       gint         pixels_below_lines)
1878 {
1879   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1880
1881   if (text_view->pixels_below_lines != pixels_below_lines)
1882     {
1883       text_view->pixels_below_lines = pixels_below_lines;
1884
1885       if (text_view->layout)
1886         {
1887           text_view->layout->default_style->pixels_below_lines = pixels_below_lines;
1888           gtk_text_layout_default_style_changed (text_view->layout);
1889         }
1890     }
1891
1892   g_object_notify (G_OBJECT (text_view), "pixels_below_lines");
1893 }
1894
1895 gint
1896 gtk_text_view_get_pixels_below_lines (GtkTextView *text_view)
1897 {
1898   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1899
1900   return text_view->pixels_below_lines;
1901 }
1902
1903 void
1904 gtk_text_view_set_pixels_inside_wrap (GtkTextView *text_view,
1905                                       gint         pixels_inside_wrap)
1906 {
1907   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1908
1909   if (text_view->pixels_inside_wrap != pixels_inside_wrap)
1910     {
1911       text_view->pixels_inside_wrap = pixels_inside_wrap;
1912
1913       if (text_view->layout)
1914         {
1915           text_view->layout->default_style->pixels_inside_wrap = pixels_inside_wrap;
1916           gtk_text_layout_default_style_changed (text_view->layout);
1917         }
1918     }
1919   g_object_notify (G_OBJECT (text_view), "pixels_inside_wrap");
1920 }
1921
1922 gint
1923 gtk_text_view_get_pixels_inside_wrap (GtkTextView *text_view)
1924 {
1925   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1926
1927   return text_view->pixels_inside_wrap;
1928 }
1929
1930 void
1931 gtk_text_view_set_justification (GtkTextView     *text_view,
1932                                  GtkJustification justify)
1933 {
1934   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1935
1936   if (text_view->justify != justify)
1937     {
1938       text_view->justify = justify;
1939
1940       if (text_view->layout)
1941         {
1942           text_view->layout->default_style->justification = justify;
1943           gtk_text_layout_default_style_changed (text_view->layout);
1944         }
1945     }
1946
1947   g_object_notify (G_OBJECT (text_view), "justification");
1948 }
1949
1950 GtkJustification
1951 gtk_text_view_get_justification (GtkTextView *text_view)
1952 {
1953   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_JUSTIFY_LEFT);
1954
1955   return text_view->justify;
1956 }
1957
1958 void
1959 gtk_text_view_set_left_margin (GtkTextView *text_view,
1960                                gint         left_margin)
1961 {
1962   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1963
1964   if (text_view->left_margin != left_margin)
1965     {
1966       text_view->left_margin = left_margin;
1967
1968       if (text_view->layout)
1969         {
1970           text_view->layout->default_style->left_margin = left_margin;
1971           gtk_text_layout_default_style_changed (text_view->layout);
1972         }
1973     }
1974
1975   g_object_notify (G_OBJECT (text_view), "left_margin");
1976 }
1977
1978 gint
1979 gtk_text_view_get_left_margin (GtkTextView *text_view)
1980 {
1981   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1982
1983   return text_view->left_margin;
1984 }
1985
1986 void
1987 gtk_text_view_set_right_margin (GtkTextView *text_view,
1988                                 gint         right_margin)
1989 {
1990   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1991
1992   if (text_view->right_margin != right_margin)
1993     {
1994       text_view->right_margin = right_margin;
1995
1996       if (text_view->layout)
1997         {
1998           text_view->layout->default_style->right_margin = right_margin;
1999           gtk_text_layout_default_style_changed (text_view->layout);
2000         }
2001     }
2002
2003   g_object_notify (G_OBJECT (text_view), "right_margin");
2004 }
2005
2006 gint
2007 gtk_text_view_get_right_margin (GtkTextView *text_view)
2008 {
2009   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2010
2011   return text_view->right_margin;
2012 }
2013
2014 void
2015 gtk_text_view_set_indent (GtkTextView *text_view,
2016                           gint         indent)
2017 {
2018   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2019
2020   if (text_view->indent != indent)
2021     {
2022       text_view->indent = indent;
2023
2024       if (text_view->layout)
2025         {
2026           text_view->layout->default_style->indent = indent;
2027           gtk_text_layout_default_style_changed (text_view->layout);
2028         }
2029     }
2030   g_object_notify (G_OBJECT (text_view), "indent");
2031 }
2032
2033 gint
2034 gtk_text_view_get_indent (GtkTextView *text_view)
2035 {
2036   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2037
2038   return text_view->indent;
2039 }
2040
2041 void
2042 gtk_text_view_set_tabs (GtkTextView   *text_view,
2043                         PangoTabArray *tabs)
2044 {
2045   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2046
2047   if (text_view->tabs)
2048     pango_tab_array_free (text_view->tabs);
2049
2050   text_view->tabs = tabs ? pango_tab_array_copy (tabs) : NULL;
2051
2052   if (text_view->layout)
2053     {
2054       /* some unkosher futzing in internal struct details... */
2055       if (text_view->layout->default_style->tabs)
2056         pango_tab_array_free (text_view->layout->default_style->tabs);
2057
2058       text_view->layout->default_style->tabs =
2059         text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
2060
2061       gtk_text_layout_default_style_changed (text_view->layout);
2062     }
2063
2064   g_object_notify (G_OBJECT (text_view), "tabs");
2065 }
2066
2067 PangoTabArray*
2068 gtk_text_view_get_tabs (GtkTextView *text_view)
2069 {
2070   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
2071
2072   return text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
2073 }
2074
2075 /**
2076  * gtk_text_view_set_cursor_visible:
2077  * @text_view: a #GtkTextView
2078  * @setting: whether to show the insertion cursor
2079  *
2080  * Toggles whether the insertion point is displayed. A buffer with no editable
2081  * text probably shouldn't have a visible cursor, so you may want to turn
2082  * the cursor off.
2083  **/
2084 void
2085 gtk_text_view_set_cursor_visible    (GtkTextView   *text_view,
2086                                      gboolean       setting)
2087 {
2088   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2089
2090   setting = (setting != FALSE);
2091
2092   if (text_view->cursor_visible != setting)
2093     {
2094       text_view->cursor_visible = setting;
2095
2096       if (GTK_WIDGET_HAS_FOCUS (text_view))
2097         {
2098           if (text_view->layout)
2099             {
2100               gtk_text_layout_set_cursor_visible (text_view->layout, setting);
2101               gtk_text_view_check_cursor_blink (text_view);
2102             }
2103         }
2104     }
2105
2106   g_object_notify (G_OBJECT (text_view), "cursor_visible");
2107 }
2108
2109 /**
2110  * gtk_text_view_get_cursor_visible:
2111  * @text_view: a #GtkTextView
2112  *
2113  * Find out whether the cursor is being displayed.
2114  *
2115  * Return value: whether the insertion mark is visible
2116  **/
2117 gboolean
2118 gtk_text_view_get_cursor_visible    (GtkTextView   *text_view)
2119 {
2120   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
2121
2122   return text_view->cursor_visible;
2123 }
2124
2125
2126 /**
2127  * gtk_text_view_place_cursor_onscreen:
2128  * @text_view: a #GtkTextView
2129  *
2130  * Moves the cursor to the currently visible region of the
2131  * buffer, it it isn't there already.
2132  *
2133  * Return value: TRUE if the cursor had to be moved.
2134  **/
2135 gboolean
2136 gtk_text_view_place_cursor_onscreen (GtkTextView *text_view)
2137 {
2138   GtkTextIter insert;
2139
2140   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
2141
2142   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
2143                                     gtk_text_buffer_get_mark (get_buffer (text_view),
2144                                                               "insert"));
2145
2146   if (clamp_iter_onscreen (text_view, &insert))
2147     {
2148       gtk_text_buffer_place_cursor (get_buffer (text_view), &insert);
2149       return TRUE;
2150     }
2151   else
2152     return FALSE;
2153 }
2154
2155 static void
2156 gtk_text_view_destroy (GtkObject *object)
2157 {
2158   GtkTextView *text_view;
2159   GtkTextLayout *layout;
2160
2161   text_view = GTK_TEXT_VIEW (object);
2162
2163   layout = text_view->layout;
2164
2165   gtk_text_view_destroy_layout (text_view);
2166   gtk_text_view_set_buffer (text_view, NULL);
2167
2168   (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
2169 }
2170
2171 static void
2172 gtk_text_view_finalize (GObject *object)
2173 {
2174   GtkTextView *text_view;
2175
2176   text_view = GTK_TEXT_VIEW (object);
2177
2178   g_return_if_fail (text_view->buffer == NULL);
2179
2180   gtk_text_view_destroy_layout (text_view);
2181   gtk_text_view_set_buffer (text_view, NULL);
2182
2183   if (text_view->pending_scroll)
2184     {
2185       free_pending_scroll (text_view->pending_scroll);
2186       text_view->pending_scroll = NULL;
2187     }
2188
2189   if (text_view->hadjustment)
2190     g_object_unref (G_OBJECT (text_view->hadjustment));
2191   if (text_view->vadjustment)
2192     g_object_unref (G_OBJECT (text_view->vadjustment));
2193
2194   text_window_free (text_view->text_window);
2195
2196   if (text_view->left_window)
2197     text_window_free (text_view->left_window);
2198
2199   if (text_view->top_window)
2200     text_window_free (text_view->top_window);
2201
2202   if (text_view->right_window)
2203     text_window_free (text_view->right_window);
2204
2205   if (text_view->bottom_window)
2206     text_window_free (text_view->bottom_window);
2207
2208   g_object_unref (G_OBJECT (text_view->im_context));
2209
2210   (* G_OBJECT_CLASS (parent_class)->finalize) (object);
2211 }
2212
2213 static void
2214 gtk_text_view_set_property (GObject         *object,
2215                             guint            prop_id,
2216                             const GValue    *value,
2217                             GParamSpec      *pspec)
2218 {
2219   GtkTextView *text_view;
2220
2221   text_view = GTK_TEXT_VIEW (object);
2222
2223   switch (prop_id)
2224     {
2225     case PROP_PIXELS_ABOVE_LINES:
2226       gtk_text_view_set_pixels_above_lines (text_view, g_value_get_int (value));
2227       break;
2228
2229     case PROP_PIXELS_BELOW_LINES:
2230       gtk_text_view_set_pixels_below_lines (text_view, g_value_get_int (value));
2231       break;
2232
2233     case PROP_PIXELS_INSIDE_WRAP:
2234       gtk_text_view_set_pixels_inside_wrap (text_view, g_value_get_int (value));
2235       break;
2236
2237     case PROP_EDITABLE:
2238       gtk_text_view_set_editable (text_view, g_value_get_boolean (value));
2239       break;
2240
2241     case PROP_WRAP_MODE:
2242       gtk_text_view_set_wrap_mode (text_view, g_value_get_enum (value));
2243       break;
2244
2245     case PROP_JUSTIFICATION:
2246       gtk_text_view_set_justification (text_view, g_value_get_enum (value));
2247       break;
2248
2249     case PROP_LEFT_MARGIN:
2250       gtk_text_view_set_left_margin (text_view, g_value_get_int (value));
2251       break;
2252
2253     case PROP_RIGHT_MARGIN:
2254       gtk_text_view_set_right_margin (text_view, g_value_get_int (value));
2255       break;
2256
2257     case PROP_INDENT:
2258       gtk_text_view_set_indent (text_view, g_value_get_int (value));
2259       break;
2260
2261     case PROP_TABS:
2262       gtk_text_view_set_tabs (text_view, g_value_get_object (value));
2263       break;
2264
2265     case PROP_CURSOR_VISIBLE:
2266       gtk_text_view_set_cursor_visible (text_view, g_value_get_boolean (value));
2267       break;
2268
2269     default:
2270       g_assert_not_reached ();
2271       break;
2272     }
2273 }
2274
2275 static void
2276 gtk_text_view_get_property (GObject         *object,
2277                             guint            prop_id,
2278                             GValue          *value,
2279                             GParamSpec      *pspec)
2280 {
2281   GtkTextView *text_view;
2282
2283   text_view = GTK_TEXT_VIEW (object);
2284
2285   switch (prop_id)
2286     {
2287     case PROP_PIXELS_ABOVE_LINES:
2288       g_value_set_int (value, text_view->pixels_above_lines);
2289       break;
2290
2291     case PROP_PIXELS_BELOW_LINES:
2292       g_value_set_int (value, text_view->pixels_below_lines);
2293       break;
2294
2295     case PROP_PIXELS_INSIDE_WRAP:
2296       g_value_set_int (value, text_view->pixels_inside_wrap);
2297       break;
2298
2299     case PROP_EDITABLE:
2300       g_value_set_boolean (value, text_view->editable);
2301       break;
2302
2303     case PROP_WRAP_MODE:
2304       g_value_set_enum (value, text_view->wrap_mode);
2305       break;
2306
2307     case PROP_JUSTIFICATION:
2308       g_value_set_enum (value, text_view->justify);
2309       break;
2310
2311     case PROP_LEFT_MARGIN:
2312       g_value_set_int (value, text_view->left_margin);
2313       break;
2314
2315     case PROP_RIGHT_MARGIN:
2316       g_value_set_int (value, text_view->right_margin);
2317       break;
2318
2319     case PROP_INDENT:
2320       g_value_set_int (value, text_view->indent);
2321       break;
2322
2323     case PROP_TABS:
2324       g_value_set_object (value, gtk_text_view_get_tabs (text_view));
2325       break;
2326
2327     case PROP_CURSOR_VISIBLE:
2328       g_value_set_boolean (value, text_view->cursor_visible);
2329       break;
2330
2331     default:
2332       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2333       break;
2334     }
2335 }
2336
2337 static void
2338 gtk_text_view_size_request (GtkWidget      *widget,
2339                             GtkRequisition *requisition)
2340 {
2341   GtkTextView *text_view;
2342   GSList *tmp_list;
2343   gint focus_edge_width;
2344   gboolean interior_focus;
2345
2346   text_view = GTK_TEXT_VIEW (widget);
2347
2348   gtk_widget_style_get (widget, "interior_focus", &interior_focus, NULL);
2349
2350   if (interior_focus)
2351     focus_edge_width = 0;
2352   else
2353     focus_edge_width = 1;
2354
2355   if (text_view->layout)
2356     {
2357       text_view->text_window->requisition.width = text_view->layout->width;
2358       text_view->text_window->requisition.height = text_view->layout->height;
2359     }
2360   else
2361     {
2362       text_view->text_window->requisition.width = 0;
2363       text_view->text_window->requisition.height = 0;
2364     }
2365
2366   requisition->width = text_view->text_window->requisition.width + focus_edge_width * 2;
2367   requisition->height = text_view->text_window->requisition.height + focus_edge_width * 2;
2368
2369   if (text_view->left_window)
2370     requisition->width += text_view->left_window->requisition.width;
2371
2372   if (text_view->right_window)
2373     requisition->width += text_view->right_window->requisition.width;
2374
2375   if (text_view->top_window)
2376     requisition->height += text_view->top_window->requisition.height;
2377
2378   if (text_view->bottom_window)
2379     requisition->height += text_view->bottom_window->requisition.height;
2380
2381   tmp_list = text_view->children;
2382   while (tmp_list != NULL)
2383     {
2384       GtkTextViewChild *child = tmp_list->data;
2385
2386       if (child->anchor)
2387         {
2388           GtkRequisition child_req;
2389           GtkRequisition old_req;
2390
2391           old_req = child->widget->requisition;
2392
2393           gtk_widget_size_request (child->widget, &child_req);
2394
2395           if (text_view->layout &&
2396               (old_req.width != child_req.width ||
2397                old_req.height != child_req.height))
2398             gtk_text_child_anchor_queue_resize (child->anchor,
2399                                                 text_view->layout);
2400         }
2401       else
2402         {
2403
2404         }
2405
2406       tmp_list = g_slist_next (tmp_list);
2407     }
2408 }
2409
2410 static void
2411 gtk_text_view_update_child_allocation (GtkTextView      *text_view,
2412                                        GtkTextViewChild *vc)
2413 {
2414   gint buffer_y;
2415   GtkTextIter iter;
2416   GtkAllocation allocation;
2417
2418   gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
2419                                             &iter,
2420                                             vc->anchor);
2421
2422   gtk_text_layout_get_line_yrange (text_view->layout, &iter,
2423                                    &buffer_y, NULL);
2424
2425   buffer_y += vc->from_top_of_line;
2426
2427   allocation.x = vc->from_left_of_buffer;
2428   allocation.y = buffer_y;
2429   allocation.width = vc->widget->requisition.width;
2430   allocation.height = vc->widget->requisition.height;
2431
2432   gtk_widget_size_allocate (vc->widget, &allocation);
2433 }
2434
2435 static void
2436 gtk_text_view_child_allocated (GtkTextLayout *layout,
2437                                GtkWidget     *child,
2438                                gint           x,
2439                                gint           y,
2440                                gpointer       data)
2441 {
2442   GtkTextViewChild *vc = NULL;
2443   GtkTextView *text_view = data;
2444
2445   /* x,y is the position of the child from the top of the line, and
2446    * from the left of the buffer. We have to translate that into text
2447    * window coordinates, then size_allocate the child.
2448    */
2449
2450   vc = g_object_get_data (G_OBJECT (child),
2451                             "gtk-text-view-child");
2452
2453   g_assert (vc != NULL);
2454
2455   g_print ("child allocated at %d,%d\n", x, y);
2456
2457   vc->from_left_of_buffer = x;
2458   vc->from_top_of_line = y;
2459
2460   gtk_text_view_update_child_allocation (text_view, vc);
2461 }
2462
2463 static void
2464 gtk_text_view_validate_children (GtkTextView *text_view)
2465 {
2466   GSList *tmp_list;
2467
2468   DV(g_print(G_STRLOC"\n"));
2469
2470   tmp_list = text_view->children;
2471   while (tmp_list != NULL)
2472     {
2473       GtkTextViewChild *child = tmp_list->data;
2474
2475       if (child->anchor)
2476         {
2477           /* We need to force-validate the regions containing
2478            * children.
2479            */
2480           GtkTextIter child_loc;
2481           gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
2482                                                     &child_loc,
2483                                                     child->anchor);
2484
2485           gtk_text_layout_validate_yrange (text_view->layout,
2486                                            &child_loc,
2487                                            0, 1);
2488         }
2489       else
2490         {
2491
2492         }
2493
2494       tmp_list = g_slist_next (tmp_list);
2495     }
2496 }
2497
2498 static void
2499 gtk_text_view_size_allocate (GtkWidget *widget,
2500                              GtkAllocation *allocation)
2501 {
2502   GtkTextView *text_view;
2503   GtkTextIter first_para;
2504   gint y;
2505   GtkAdjustment *vadj;
2506   gboolean yoffset_changed = FALSE;
2507   gint width, height;
2508   GdkRectangle text_rect;
2509   GdkRectangle left_rect;
2510   GdkRectangle right_rect;
2511   GdkRectangle top_rect;
2512   GdkRectangle bottom_rect;
2513   gint focus_edge_width;
2514   gboolean interior_focus;
2515
2516   text_view = GTK_TEXT_VIEW (widget);
2517
2518   DV(g_print(G_STRLOC"\n"));
2519
2520   widget->allocation = *allocation;
2521
2522   if (GTK_WIDGET_REALIZED (widget))
2523     {
2524       gdk_window_move_resize (widget->window,
2525                               allocation->x, allocation->y,
2526                               allocation->width, allocation->height);
2527     }
2528
2529   /* distribute width/height among child windows. Ensure all
2530    * windows get at least a 1x1 allocation.
2531    */
2532
2533   gtk_widget_style_get (widget, "interior_focus", &interior_focus, NULL);
2534
2535   if (interior_focus)
2536     focus_edge_width = 0;
2537   else
2538     focus_edge_width = 1;
2539
2540   width = allocation->width - focus_edge_width * 2;
2541
2542   if (text_view->left_window)
2543     left_rect.width = text_view->left_window->requisition.width;
2544   else
2545     left_rect.width = 1;
2546
2547   width -= left_rect.width;
2548
2549   if (text_view->right_window)
2550     right_rect.width = text_view->right_window->requisition.width;
2551   else
2552     right_rect.width = 1;
2553
2554   width -= right_rect.width;
2555
2556   text_rect.width = MAX (1, width);
2557
2558   top_rect.width = text_rect.width;
2559   bottom_rect.width = text_rect.width;
2560
2561
2562   height = allocation->height - focus_edge_width * 2;
2563
2564   if (text_view->top_window)
2565     top_rect.height = text_view->top_window->requisition.height;
2566   else
2567     top_rect.height = 1;
2568
2569   height -= top_rect.height;
2570
2571   if (text_view->bottom_window)
2572     bottom_rect.height = text_view->bottom_window->requisition.height;
2573   else
2574     bottom_rect.height = 1;
2575
2576   height -= bottom_rect.height;
2577
2578   text_rect.height = MAX (1, height);
2579
2580   left_rect.height = text_rect.height;
2581   right_rect.height = text_rect.height;
2582
2583   /* Origins */
2584   left_rect.x = focus_edge_width;
2585   top_rect.y = focus_edge_width;
2586
2587   text_rect.x = left_rect.x + left_rect.width;
2588   text_rect.y = top_rect.y + top_rect.height;
2589
2590   left_rect.y = text_rect.y;
2591   right_rect.y = text_rect.y;
2592
2593   top_rect.x = text_rect.x;
2594   bottom_rect.x = text_rect.x;
2595
2596   right_rect.x = text_rect.x + text_rect.width;
2597   bottom_rect.y = text_rect.y + text_rect.height;
2598
2599   text_window_size_allocate (text_view->text_window,
2600                              &text_rect);
2601
2602   if (text_view->left_window)
2603     text_window_size_allocate (text_view->left_window,
2604                                &left_rect);
2605
2606   if (text_view->right_window)
2607     text_window_size_allocate (text_view->right_window,
2608                                &right_rect);
2609
2610   if (text_view->top_window)
2611     text_window_size_allocate (text_view->top_window,
2612                                &top_rect);
2613
2614   if (text_view->bottom_window)
2615     text_window_size_allocate (text_view->bottom_window,
2616                                &bottom_rect);
2617
2618   gtk_text_view_update_layout_width (text_view);
2619
2620   /* This is because validating children ends up size allocating them. */
2621   gtk_text_view_validate_children (text_view);
2622
2623   /* Now adjust the value of the adjustment to keep the cursor at the
2624    * same place in the buffer
2625    */
2626   gtk_text_view_get_first_para_iter (text_view, &first_para);
2627   gtk_text_layout_get_line_yrange (text_view->layout, &first_para, &y, NULL);
2628
2629   y += text_view->first_para_pixels;
2630
2631   /* Ensure h/v adj exist */
2632   get_hadjustment (text_view);
2633   get_vadjustment (text_view);
2634
2635   vadj = text_view->vadjustment;
2636   if (y > vadj->upper - vadj->page_size)
2637     y = MAX (0, vadj->upper - vadj->page_size);
2638
2639   if (y != text_view->yoffset)
2640     {
2641       vadj->value = text_view->yoffset = y;
2642       yoffset_changed = TRUE;
2643     }
2644
2645   text_view->hadjustment->page_size = SCREEN_WIDTH (text_view);
2646   text_view->hadjustment->page_increment = SCREEN_WIDTH (text_view) / 2;
2647   text_view->hadjustment->lower = 0;
2648   text_view->hadjustment->upper = MAX (SCREEN_WIDTH (text_view),
2649                                        text_view->width);
2650   gtk_signal_emit_by_name (GTK_OBJECT (text_view->hadjustment), "changed");
2651
2652   text_view->vadjustment->page_size = SCREEN_HEIGHT (text_view);
2653   text_view->vadjustment->page_increment = SCREEN_HEIGHT (text_view) / 2;
2654   text_view->vadjustment->lower = 0;
2655   text_view->vadjustment->upper = MAX (SCREEN_HEIGHT (text_view),
2656                                        text_view->height);
2657   gtk_signal_emit_by_name (GTK_OBJECT (text_view->vadjustment), "changed");
2658
2659   if (yoffset_changed)
2660     gtk_adjustment_value_changed (vadj);
2661
2662   if (text_view->first_validate_idle != 0)
2663     {
2664       /* The GTK resize loop processes all the pending exposes right
2665        * after doing the resize stuff, so the idle sizer won't have a
2666        * chance to run. So we do the work here.
2667        */
2668
2669       g_source_remove (text_view->first_validate_idle);
2670       text_view->first_validate_idle = 0;
2671
2672       if (!gtk_text_view_flush_scroll (text_view))
2673         gtk_text_view_validate_onscreen (text_view);
2674     }
2675 }
2676
2677 static void
2678 gtk_text_view_get_first_para_iter (GtkTextView *text_view,
2679                                    GtkTextIter *iter)
2680 {
2681   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), iter,
2682                                     text_view->first_para_mark);
2683 }
2684
2685 static void
2686 gtk_text_view_validate_onscreen (GtkTextView *text_view)
2687 {
2688   GtkWidget *widget = GTK_WIDGET (text_view);
2689
2690   DV(g_print(">Validating onscreen ("G_STRLOC")\n"));
2691
2692   if (SCREEN_HEIGHT (widget) > 0)
2693     {
2694       GtkTextIter first_para;
2695
2696       /* Be sure we've validated the stuff onscreen; if we
2697        * scrolled, these calls won't have any effect, because
2698        * they were called in the recursive validate_onscreen
2699        */
2700       gtk_text_view_get_first_para_iter (text_view, &first_para);
2701
2702       gtk_text_layout_validate_yrange (text_view->layout,
2703                                        &first_para,
2704                                        0,
2705                                        text_view->first_para_pixels +
2706                                        SCREEN_HEIGHT (widget));
2707     }
2708
2709   text_view->onscreen_validated = TRUE;
2710
2711   DV(g_print(">Done validating onscreen, onscreen_validated = TRUE ("G_STRLOC")\n"));
2712
2713   /* This can have the odd side effect of triggering a scroll, which should
2714    * flip "onscreen_validated" back to FALSE, but should also get us
2715    * back into this function to turn it on again.
2716    */
2717   gtk_text_view_update_adjustments (text_view);
2718
2719   g_assert (text_view->onscreen_validated);
2720 }
2721
2722 static gboolean
2723 first_validate_callback (gpointer data)
2724 {
2725   GtkTextView *text_view = data;
2726
2727   GDK_THREADS_ENTER ();
2728
2729   /* Note that some of this code is duplicated at the end of size_allocate,
2730    * keep in sync with that.
2731    */
2732
2733   DV(g_print(G_STRLOC"\n"));
2734
2735   /* Do this first, which means that if an "invalidate"
2736    * occurs during any of this process, a new first_validate_callback
2737    * will be installed, and we'll start again.
2738    */
2739   text_view->first_validate_idle = 0;
2740
2741   /* be sure we have up-to-date screen size set on the
2742    * layout.
2743    */
2744   gtk_text_view_update_layout_width (text_view);
2745
2746   /* Bail out if we invalidated stuff; scrolling right away will just
2747    * confuse the issue.
2748    */
2749   if (text_view->first_validate_idle != 0)
2750     {
2751       DV(g_print(">Width change forced requeue ("G_STRLOC")\n"));
2752     }
2753   else
2754     {
2755       /* scroll to any marks, if that's pending. This can
2756        * jump us to the validation codepath used for scrolling
2757        * onscreen, if so we bail out.
2758        */
2759       if (!gtk_text_view_flush_scroll (text_view))
2760         gtk_text_view_validate_onscreen (text_view);
2761
2762       DV(g_print(">Leaving first validate idle ("G_STRLOC")\n"));
2763
2764       g_assert (text_view->onscreen_validated);
2765
2766     }
2767
2768   GDK_THREADS_LEAVE ();
2769
2770   return FALSE;
2771 }
2772
2773 static gboolean
2774 incremental_validate_callback (gpointer data)
2775 {
2776   GtkTextView *text_view = data;
2777   gboolean result = TRUE;
2778
2779   GDK_THREADS_ENTER ();
2780
2781   DV(g_print(G_STRLOC"\n"));
2782
2783   gtk_text_layout_validate (text_view->layout, 2000);
2784
2785   gtk_text_view_update_adjustments (text_view);
2786
2787   if (gtk_text_layout_is_valid (text_view->layout))
2788     {
2789       text_view->incremental_validate_idle = 0;
2790       result = FALSE;
2791     }
2792
2793   GDK_THREADS_LEAVE ();
2794
2795   return result;
2796 }
2797
2798 static void
2799 invalidated_handler (GtkTextLayout *layout,
2800                      gpointer       data)
2801 {
2802   GtkTextView *text_view;
2803
2804   text_view = GTK_TEXT_VIEW (data);
2805
2806   text_view->onscreen_validated = FALSE;
2807
2808   DV(g_print(">Invalidate, onscreen_validated = FALSE ("G_STRLOC")\n"));
2809
2810   if (!text_view->first_validate_idle)
2811     {
2812       text_view->first_validate_idle = g_idle_add_full (GTK_PRIORITY_RESIZE - 2, first_validate_callback, text_view, NULL);
2813       DV (g_print (G_STRLOC": adding first validate idle %d\n",
2814                    text_view->first_validate_idle));
2815     }
2816
2817   if (!text_view->incremental_validate_idle)
2818     {
2819       text_view->incremental_validate_idle = g_idle_add_full (GTK_TEXT_VIEW_PRIORITY_VALIDATE, incremental_validate_callback, text_view, NULL);
2820       DV (g_print (G_STRLOC": adding incremental validate idle %d\n",
2821                    text_view->incremental_validate_idle));
2822     }
2823 }
2824
2825 static void
2826 changed_handler (GtkTextLayout *layout,
2827                  gint           start_y,
2828                  gint           old_height,
2829                  gint           new_height,
2830                  gpointer       data)
2831 {
2832   GtkTextView *text_view;
2833   GtkWidget *widget;
2834   GdkRectangle visible_rect;
2835   GdkRectangle redraw_rect;
2836
2837   text_view = GTK_TEXT_VIEW (data);
2838   widget = GTK_WIDGET (data);
2839
2840   DV(g_print(">Lines Validated ("G_STRLOC")\n"));
2841
2842   if (GTK_WIDGET_REALIZED (text_view))
2843     {
2844       gtk_text_view_get_visible_rect (text_view, &visible_rect);
2845
2846       redraw_rect.x = visible_rect.x;
2847       redraw_rect.width = visible_rect.width;
2848       redraw_rect.y = start_y;
2849
2850       if (old_height == new_height)
2851         redraw_rect.height = old_height;
2852       else
2853         redraw_rect.height = MAX (0, visible_rect.y + visible_rect.height - start_y);
2854
2855       if (gdk_rectangle_intersect (&redraw_rect, &visible_rect, &redraw_rect))
2856         {
2857           /* text_window_invalidate_rect() takes buffer coordinates */
2858           text_window_invalidate_rect (text_view->text_window,
2859                                        &redraw_rect);
2860
2861           DV(g_print(" invalidated rect: %d,%d %d x %d\n",
2862                      redraw_rect.x,
2863                      redraw_rect.y,
2864                      redraw_rect.width,
2865                      redraw_rect.height));
2866
2867           if (text_view->left_window)
2868             text_window_invalidate_rect (text_view->left_window,
2869                                          &redraw_rect);
2870           if (text_view->right_window)
2871             text_window_invalidate_rect (text_view->right_window,
2872                                          &redraw_rect);
2873           if (text_view->top_window)
2874             text_window_invalidate_rect (text_view->top_window,
2875                                          &redraw_rect);
2876           if (text_view->bottom_window)
2877             text_window_invalidate_rect (text_view->bottom_window,
2878                                          &redraw_rect);
2879         }
2880     }
2881
2882   if (old_height != new_height)
2883     {
2884       gboolean yoffset_changed = FALSE;
2885       GSList *tmp_list;
2886
2887       if (start_y + old_height <= text_view->yoffset - text_view->first_para_pixels)
2888         {
2889           text_view->yoffset += new_height - old_height;
2890           get_vadjustment (text_view)->value = text_view->yoffset;
2891           yoffset_changed = TRUE;
2892         }
2893
2894       if (yoffset_changed)
2895         gtk_adjustment_value_changed (get_vadjustment (text_view));
2896
2897       /* FIXME be smarter about which anchored widgets we update */
2898
2899       tmp_list = text_view->children;
2900       while (tmp_list != NULL)
2901         {
2902           GtkTextViewChild *child = tmp_list->data;
2903
2904           if (child->anchor)
2905             gtk_text_view_update_child_allocation (text_view, child);
2906
2907           tmp_list = g_slist_next (tmp_list);
2908         }
2909     }
2910
2911   gtk_widget_queue_resize (widget);
2912 }
2913
2914 static void
2915 gtk_text_view_realize_cursor_gc (GtkTextView *text_view)
2916 {
2917   GdkColor *cursor_color;
2918   GdkColor red = { 0, 0xffff, 0x0000, 0x0000 };
2919
2920   if (text_view->cursor_gc)
2921     gdk_gc_unref (text_view->cursor_gc);
2922
2923   gtk_widget_style_get (GTK_WIDGET (text_view), "cursor_color", &cursor_color, NULL);
2924
2925   if (!cursor_color)
2926     cursor_color = &red;
2927
2928   text_view->cursor_gc = gdk_gc_new (text_view->text_window->bin_window);
2929   gdk_gc_set_rgb_fg_color (text_view->cursor_gc, cursor_color);
2930 }
2931
2932 static void
2933 gtk_text_view_realize (GtkWidget *widget)
2934 {
2935   GtkTextView *text_view;
2936   GdkWindowAttr attributes;
2937   gint attributes_mask;
2938
2939   text_view = GTK_TEXT_VIEW (widget);
2940   GTK_WIDGET_SET_FLAGS (text_view, GTK_REALIZED);
2941
2942   attributes.window_type = GDK_WINDOW_CHILD;
2943   attributes.x = widget->allocation.x;
2944   attributes.y = widget->allocation.y;
2945   attributes.width = widget->allocation.width;
2946   attributes.height = widget->allocation.height;
2947   attributes.wclass = GDK_INPUT_OUTPUT;
2948   attributes.visual = gtk_widget_get_visual (widget);
2949   attributes.colormap = gtk_widget_get_colormap (widget);
2950   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK | GDK_EXPOSURE_MASK;
2951
2952   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
2953
2954   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
2955                                    &attributes, attributes_mask);
2956   gdk_window_set_user_data (widget->window, widget);
2957
2958   /* must come before text_window_realize calls */
2959   widget->style = gtk_style_attach (widget->style, widget->window);
2960
2961   gdk_window_set_background (widget->window,
2962                              &widget->style->bg[GTK_WIDGET_STATE (widget)]);
2963
2964   text_window_realize (text_view->text_window, widget->window);
2965
2966   if (text_view->left_window)
2967     text_window_realize (text_view->left_window,
2968                          widget->window);
2969
2970   if (text_view->top_window)
2971     text_window_realize (text_view->top_window,
2972                          widget->window);
2973
2974   if (text_view->right_window)
2975     text_window_realize (text_view->right_window,
2976                          widget->window);
2977
2978   if (text_view->bottom_window)
2979     text_window_realize (text_view->bottom_window,
2980                          widget->window);
2981
2982   gtk_text_view_realize_cursor_gc (text_view);
2983
2984   gtk_text_view_ensure_layout (text_view);
2985
2986   if (text_view->buffer)
2987     gtk_text_buffer_add_selection_clipboard (text_view->buffer,
2988                                              gtk_clipboard_get (GDK_SELECTION_PRIMARY));
2989 }
2990
2991 static void
2992 gtk_text_view_unrealize (GtkWidget *widget)
2993 {
2994   GtkTextView *text_view;
2995
2996   text_view = GTK_TEXT_VIEW (widget);
2997
2998   if (text_view->buffer)
2999     gtk_text_buffer_remove_selection_clipboard (text_view->buffer,
3000                                                 gtk_clipboard_get (GDK_SELECTION_PRIMARY));
3001
3002   if (text_view->cursor_gc)
3003     {
3004       gdk_gc_unref (text_view->cursor_gc);
3005       text_view->cursor_gc = NULL;
3006     }
3007
3008   if (text_view->first_validate_idle)
3009     {
3010       g_source_remove (text_view->first_validate_idle);
3011       text_view->first_validate_idle = 0;
3012     }
3013
3014   if (text_view->incremental_validate_idle)
3015     {
3016       g_source_remove (text_view->incremental_validate_idle);
3017       text_view->incremental_validate_idle = 0;
3018     }
3019
3020   if (text_view->popup_menu)
3021     {
3022       gtk_widget_destroy (text_view->popup_menu);
3023       text_view->popup_menu = NULL;
3024     }
3025
3026   text_window_unrealize (text_view->text_window);
3027
3028   if (text_view->left_window)
3029     text_window_unrealize (text_view->left_window);
3030
3031   if (text_view->top_window)
3032     text_window_unrealize (text_view->top_window);
3033
3034   if (text_view->right_window)
3035     text_window_unrealize (text_view->right_window);
3036
3037   if (text_view->bottom_window)
3038     text_window_unrealize (text_view->bottom_window);
3039
3040   gtk_text_view_destroy_layout (text_view);
3041
3042   (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
3043 }
3044
3045 static void
3046 gtk_text_view_style_set (GtkWidget *widget,
3047                          GtkStyle  *previous_style)
3048 {
3049   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3050
3051   if (GTK_WIDGET_REALIZED (widget))
3052     {
3053       gdk_window_set_background (widget->window,
3054                                  &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3055
3056       gdk_window_set_background (text_view->text_window->bin_window,
3057                                  &widget->style->base[GTK_WIDGET_STATE (widget)]);
3058
3059       if (text_view->left_window)
3060         gdk_window_set_background (text_view->left_window->bin_window,
3061                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3062       if (text_view->right_window)
3063         gdk_window_set_background (text_view->right_window->bin_window,
3064                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3065
3066       if (text_view->top_window)
3067         gdk_window_set_background (text_view->top_window->bin_window,
3068                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3069
3070       if (text_view->bottom_window)
3071         gdk_window_set_background (text_view->bottom_window->bin_window,
3072                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3073
3074       gtk_text_view_realize_cursor_gc (text_view);
3075     }
3076
3077   if (text_view->layout && previous_style)
3078     {
3079       gtk_text_view_set_attributes_from_style (text_view,
3080                                                text_view->layout->default_style,
3081                                                widget->style);
3082       gtk_text_layout_default_style_changed (text_view->layout);
3083     }
3084 }
3085
3086 static void
3087 gtk_text_view_direction_changed (GtkWidget        *widget,
3088                                  GtkTextDirection  previous_direction)
3089 {
3090   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3091
3092   if (text_view->layout)
3093     {
3094       text_view->layout->default_style->direction = gtk_widget_get_direction (widget);
3095       gtk_text_layout_default_style_changed (text_view->layout);
3096     }
3097 }
3098
3099 /*
3100  * Events
3101  */
3102
3103 static gboolean
3104 get_event_coordinates (GdkEvent *event, gint *x, gint *y)
3105 {
3106   if (event)
3107     switch (event->type)
3108       {
3109       case GDK_MOTION_NOTIFY:
3110         *x = event->motion.x;
3111         *y = event->motion.y;
3112         return TRUE;
3113         break;
3114
3115       case GDK_BUTTON_PRESS:
3116       case GDK_2BUTTON_PRESS:
3117       case GDK_3BUTTON_PRESS:
3118       case GDK_BUTTON_RELEASE:
3119         *x = event->button.x;
3120         *y = event->button.y;
3121         return TRUE;
3122         break;
3123
3124       case GDK_KEY_PRESS:
3125       case GDK_KEY_RELEASE:
3126       case GDK_ENTER_NOTIFY:
3127       case GDK_LEAVE_NOTIFY:
3128       case GDK_PROPERTY_NOTIFY:
3129       case GDK_SELECTION_CLEAR:
3130       case GDK_SELECTION_REQUEST:
3131       case GDK_SELECTION_NOTIFY:
3132       case GDK_PROXIMITY_IN:
3133       case GDK_PROXIMITY_OUT:
3134       case GDK_DRAG_ENTER:
3135       case GDK_DRAG_LEAVE:
3136       case GDK_DRAG_MOTION:
3137       case GDK_DRAG_STATUS:
3138       case GDK_DROP_START:
3139       case GDK_DROP_FINISHED:
3140       default:
3141         return FALSE;
3142         break;
3143       }
3144
3145   return FALSE;
3146 }
3147
3148 static gint
3149 emit_event_on_tags (GtkWidget   *widget,
3150                     GdkEvent    *event,
3151                     GtkTextIter *iter)
3152 {
3153   GSList *tags;
3154   GSList *tmp;
3155   gboolean retval = FALSE;
3156   GtkTextView *text_view;
3157
3158   text_view = GTK_TEXT_VIEW (widget);
3159
3160   tags = gtk_text_iter_get_tags (iter);
3161
3162   tmp = tags;
3163   while (tmp != NULL)
3164     {
3165       GtkTextTag *tag = tmp->data;
3166
3167       if (gtk_text_tag_event (tag, G_OBJECT (widget), event, iter))
3168         {
3169           retval = TRUE;
3170           break;
3171         }
3172
3173       tmp = g_slist_next (tmp);
3174     }
3175
3176   g_slist_free (tags);
3177
3178   return retval;
3179 }
3180
3181 static gint
3182 gtk_text_view_event (GtkWidget *widget, GdkEvent *event)
3183 {
3184   GtkTextView *text_view;
3185   gint x = 0, y = 0;
3186
3187   text_view = GTK_TEXT_VIEW (widget);
3188
3189   if (text_view->layout == NULL ||
3190       get_buffer (text_view) == NULL)
3191     return FALSE;
3192
3193   if (event->any.window != text_view->text_window->bin_window)
3194     return FALSE;
3195
3196   if (get_event_coordinates (event, &x, &y))
3197     {
3198       GtkTextIter iter;
3199
3200       x += text_view->xoffset;
3201       y += text_view->yoffset;
3202
3203       /* FIXME this is slow and we do it twice per event.
3204        * My favorite solution is to have GtkTextLayout cache
3205        * the last couple lookups.
3206        */
3207       gtk_text_layout_get_iter_at_pixel (text_view->layout,
3208                                          &iter,
3209                                          x, y);
3210
3211       return emit_event_on_tags (widget, event, &iter);
3212     }
3213   else if (event->type == GDK_KEY_PRESS ||
3214            event->type == GDK_KEY_RELEASE)
3215     {
3216       GtkTextMark *insert;
3217       GtkTextIter iter;
3218
3219       insert = gtk_text_buffer_get_mark (get_buffer (text_view),
3220                                          "insert");
3221
3222       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
3223
3224       return emit_event_on_tags (widget, event, &iter);
3225     }
3226   else
3227     return FALSE;
3228 }
3229
3230 static gint
3231 gtk_text_view_key_press_event (GtkWidget *widget, GdkEventKey *event)
3232 {
3233   gboolean retval = FALSE;
3234   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3235   GtkTextMark *insert;
3236   GtkTextIter iter;
3237
3238   if (text_view->layout == NULL ||
3239       get_buffer (text_view) == NULL)
3240     return FALSE;
3241
3242   insert = gtk_text_buffer_get_insert (get_buffer (text_view));
3243   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
3244   if (gtk_text_iter_can_insert (&iter, text_view->editable) &&
3245       gtk_im_context_filter_keypress (text_view->im_context, event))
3246     {
3247       text_view->need_im_reset = TRUE;
3248       retval = TRUE;
3249     }
3250   else if (GTK_WIDGET_CLASS (parent_class)->key_press_event &&
3251            GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, event))
3252     retval = TRUE;
3253   else if (event->keyval == GDK_Return ||
3254            event->keyval == GDK_KP_Enter)
3255     {
3256       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\n", 1,
3257                                                     text_view->editable);
3258       DV(g_print (G_STRLOC": scrolling to mark\n"));
3259       gtk_text_view_scroll_to_mark (text_view,
3260                                     gtk_text_buffer_get_mark (get_buffer (text_view),
3261                                                               "insert"),
3262                                     0.0, FALSE, 0.0, 0.0);
3263       retval = TRUE;
3264     }
3265   /* Pass through Tab as literal tab, unless Control is held down */
3266   else if ((event->keyval == GDK_Tab ||
3267             event->keyval == GDK_KP_Tab ||
3268             event->keyval == GDK_ISO_Left_Tab) &&
3269            !(event->state & GDK_CONTROL_MASK))
3270     {
3271       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\t", 1,
3272                                                     text_view->editable);
3273       DV(g_print (G_STRLOC": scrolling onscreen\n"));
3274       gtk_text_view_scroll_mark_onscreen (text_view,
3275                                           gtk_text_buffer_get_mark (get_buffer (text_view),
3276                                                                     "insert"));
3277       retval = TRUE;
3278     }
3279   else
3280     retval = FALSE;
3281
3282   gtk_text_view_pend_cursor_blink (text_view);
3283
3284   return retval;
3285 }
3286
3287 static gint
3288 gtk_text_view_key_release_event (GtkWidget *widget, GdkEventKey *event)
3289 {
3290   return FALSE;
3291 }
3292
3293 static gint
3294 gtk_text_view_button_press_event (GtkWidget *widget, GdkEventButton *event)
3295 {
3296   GtkTextView *text_view;
3297
3298   text_view = GTK_TEXT_VIEW (widget);
3299
3300   text_view->disable_scroll_on_focus = TRUE;
3301   gtk_widget_grab_focus (widget);
3302   text_view->disable_scroll_on_focus = FALSE;
3303
3304   if (event->window != text_view->text_window->bin_window)
3305     {
3306       /* Remove selection if any. */
3307       gtk_text_view_unselect (text_view);
3308       return FALSE;
3309     }
3310
3311 #if 0
3312   /* debug hack */
3313   if (event->button == 3 && (event->state & GDK_CONTROL_MASK) != 0)
3314     _gtk_text_buffer_spew (GTK_TEXT_VIEW (widget)->buffer);
3315   else if (event->button == 3)
3316     gtk_text_layout_spew (GTK_TEXT_VIEW (widget)->layout);
3317 #endif
3318
3319   if (event->type == GDK_BUTTON_PRESS)
3320     {
3321       gtk_text_view_reset_im_context (text_view);
3322
3323       if (event->button == 1)
3324         {
3325           /* If we're in the selection, start a drag copy/move of the
3326            * selection; otherwise, start creating a new selection.
3327            */
3328           GtkTextIter iter;
3329           GtkTextIter start, end;
3330
3331           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3332                                              &iter,
3333                                              event->x + text_view->xoffset,
3334                                              event->y + text_view->yoffset);
3335
3336           if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
3337                                                     &start, &end) &&
3338               gtk_text_iter_in_range (&iter, &start, &end))
3339             {
3340               text_view->drag_start_x = event->x;
3341               text_view->drag_start_y = event->y;
3342               text_view->pending_place_cursor_button = event->button;
3343             }
3344           else
3345             {
3346               gtk_text_view_start_selection_drag (text_view, &iter, event);
3347             }
3348
3349           return TRUE;
3350         }
3351       else if (event->button == 2)
3352         {
3353           GtkTextIter iter;
3354
3355           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3356                                              &iter,
3357                                              event->x + text_view->xoffset,
3358                                              event->y + text_view->yoffset);
3359
3360           gtk_text_buffer_paste_clipboard (get_buffer (text_view),
3361                                            gtk_clipboard_get (GDK_SELECTION_PRIMARY),
3362                                            &iter,
3363                                            text_view->editable);
3364           return TRUE;
3365         }
3366       else if (event->button == 3)
3367         {
3368           gtk_text_view_do_popup (text_view, event);
3369         }
3370     }
3371   else if ((event->type == GDK_2BUTTON_PRESS ||
3372             event->type == GDK_3BUTTON_PRESS) &&
3373            event->button == 1)
3374     {
3375       GtkTextIter start, end;
3376
3377       /* End the selection drag, otherwise we'd clear the new
3378        * word/line selection on button release
3379        */
3380       gtk_text_view_end_selection_drag (text_view, event);
3381
3382       gtk_text_layout_get_iter_at_pixel (text_view->layout,
3383                                          &start,
3384                                          event->x + text_view->xoffset,
3385                                          event->y + text_view->yoffset);
3386
3387       end = start;
3388
3389       if (event->type == GDK_2BUTTON_PRESS)
3390         {
3391           if (gtk_text_iter_inside_word (&start))
3392             {
3393               if (!gtk_text_iter_starts_word (&start))
3394                 gtk_text_iter_backward_word_start (&start);
3395
3396               if (!gtk_text_iter_ends_word (&end))
3397                 gtk_text_iter_forward_word_end (&end);
3398             }
3399         }
3400       else if (event->type == GDK_3BUTTON_PRESS)
3401         {
3402           if (gtk_text_view_starts_display_line (text_view, &start))
3403             {
3404               /* If on a display line boundary, we assume the user
3405                * clicked off the end of a line and we therefore select
3406                * the line before the boundary.
3407                */
3408               gtk_text_view_backward_display_line_start (text_view, &start);
3409             }
3410           else
3411             {
3412               /* start isn't on the start of a line, so we move it to the
3413                * start, and move end to the end unless it's already there.
3414                */
3415               gtk_text_view_backward_display_line_start (text_view, &start);
3416
3417               if (!gtk_text_view_starts_display_line (text_view, &end))
3418                 gtk_text_view_forward_display_line_end (text_view, &end);
3419             }
3420         }
3421
3422       gtk_text_buffer_move_mark (get_buffer (text_view),
3423                                  gtk_text_buffer_get_selection_bound (get_buffer (text_view)),
3424                                  &start);
3425       gtk_text_buffer_move_mark (get_buffer (text_view),
3426                                  gtk_text_buffer_get_insert (get_buffer (text_view)),
3427                                  &end);
3428
3429       text_view->just_selected_element = TRUE;
3430
3431       return TRUE;
3432     }
3433
3434   return FALSE;
3435 }
3436
3437 static gint
3438 gtk_text_view_button_release_event (GtkWidget *widget, GdkEventButton *event)
3439 {
3440   GtkTextView *text_view;
3441
3442   text_view = GTK_TEXT_VIEW (widget);
3443
3444   if (event->window != text_view->text_window->bin_window)
3445     return FALSE;
3446
3447   if (event->button == 1)
3448     {
3449       if (text_view->drag_start_x >= 0)
3450         {
3451           text_view->drag_start_x = -1;
3452           text_view->drag_start_y = -1;
3453         }
3454
3455       if (gtk_text_view_end_selection_drag (GTK_TEXT_VIEW (widget), event))
3456         return TRUE;
3457       else if (text_view->just_selected_element)
3458         {
3459           text_view->just_selected_element = FALSE;
3460           return FALSE;
3461         }
3462       else if (text_view->pending_place_cursor_button == event->button)
3463         {
3464           GtkTextIter iter;
3465
3466           /* Unselect everything; we clicked inside selection, but
3467            * didn't move by the drag threshold, so just clear selection
3468            * and place cursor.
3469            */
3470           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3471                                              &iter,
3472                                              event->x + text_view->xoffset,
3473                                              event->y + text_view->yoffset);
3474
3475           gtk_text_buffer_place_cursor (get_buffer (text_view), &iter);
3476
3477           text_view->pending_place_cursor_button = 0;
3478
3479           return FALSE;
3480         }
3481     }
3482
3483   return FALSE;
3484 }
3485
3486 static void
3487 keymap_direction_changed (GdkKeymap   *keymap,
3488                           GtkTextView *text_view)
3489 {
3490   gtk_text_view_check_keymap_direction (text_view);
3491 }
3492
3493 static gint
3494 gtk_text_view_focus_in_event (GtkWidget *widget, GdkEventFocus *event)
3495 {
3496   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3497
3498   GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3499   gtk_widget_queue_draw (widget);
3500
3501   DV(g_print (G_STRLOC": focus_in_event\n"));
3502
3503   if (text_view->cursor_visible && text_view->layout)
3504     {
3505       gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3506       gtk_text_view_check_cursor_blink (text_view);
3507     }
3508
3509   g_signal_connect (gdk_keymap_get_default (),
3510                     "direction_changed",
3511                     G_CALLBACK (keymap_direction_changed), text_view);
3512   gtk_text_view_check_keymap_direction (text_view);
3513
3514   text_view->need_im_reset = TRUE;
3515   gtk_im_context_focus_in (GTK_TEXT_VIEW (widget)->im_context);
3516
3517   return FALSE;
3518 }
3519
3520 static gint
3521 gtk_text_view_focus_out_event (GtkWidget *widget, GdkEventFocus *event)
3522 {
3523   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3524
3525   GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3526   gtk_widget_queue_draw (widget);
3527
3528   DV(g_print (G_STRLOC": focus_out_event\n"));
3529
3530   if (text_view->cursor_visible && text_view->layout)
3531     {
3532       gtk_text_layout_set_cursor_visible (text_view->layout, FALSE);
3533       gtk_text_view_check_cursor_blink (text_view);
3534     }
3535
3536   g_signal_handlers_disconnect_by_func (gdk_keymap_get_default (),
3537                                         keymap_direction_changed,
3538                                         text_view);
3539
3540   text_view->need_im_reset = TRUE;
3541   gtk_im_context_focus_out (GTK_TEXT_VIEW (widget)->im_context);
3542
3543   return FALSE;
3544 }
3545
3546 static gint
3547 gtk_text_view_motion_event (GtkWidget *widget, GdkEventMotion *event)
3548 {
3549   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3550
3551   if (event->window == text_view->text_window->bin_window &&
3552       text_view->drag_start_x >= 0)
3553     {
3554       gint x, y;
3555
3556       gdk_window_get_pointer (text_view->text_window->bin_window,
3557                               &x, &y, NULL);
3558
3559       if (gtk_drag_check_threshold (widget,
3560                                     text_view->drag_start_x,
3561                                     text_view->drag_start_y,
3562                                     x, y))
3563         {
3564           GtkTextIter iter;
3565           gint buffer_x, buffer_y;
3566
3567           gtk_text_view_window_to_buffer_coords (text_view,
3568                                                  GTK_TEXT_WINDOW_TEXT,
3569                                                  text_view->drag_start_x,
3570                                                  text_view->drag_start_y,
3571                                                  &buffer_x,
3572                                                  &buffer_y);
3573
3574           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3575                                              &iter,
3576                                              buffer_x, buffer_y);
3577
3578           gtk_text_view_start_selection_dnd (text_view, &iter, event);
3579           return TRUE;
3580         }
3581     }
3582
3583   return FALSE;
3584 }
3585
3586 static void
3587 gtk_text_view_paint (GtkWidget *widget, GdkRectangle *area)
3588 {
3589   GtkTextView *text_view;
3590
3591   text_view = GTK_TEXT_VIEW (widget);
3592
3593   g_return_if_fail (text_view->layout != NULL);
3594   g_return_if_fail (text_view->xoffset >= 0);
3595   g_return_if_fail (text_view->yoffset >= 0);
3596
3597   DV (g_print (G_STRLOC": first_validate_idle: %d\n",
3598                text_view->first_validate_idle));
3599
3600   if (!text_view->onscreen_validated)
3601     {
3602       G_BREAKPOINT ();
3603       g_warning (G_STRLOC ": somehow some text lines were modified or scrolling occurred since the last validation of lines on the screen");
3604     }
3605
3606 #if 0
3607   printf ("painting %d,%d  %d x %d\n",
3608           area->x, area->y,
3609           area->width, area->height);
3610 #endif
3611
3612   gtk_text_layout_draw (text_view->layout,
3613                         widget,
3614                         text_view->text_window->bin_window,
3615                         text_view->cursor_gc,
3616                         text_view->xoffset,
3617                         text_view->yoffset,
3618                         area->x, area->y,
3619                         area->width, area->height);
3620 }
3621
3622 static gint
3623 gtk_text_view_expose_event (GtkWidget *widget, GdkEventExpose *event)
3624 {
3625 #if 0
3626   {
3627     GdkWindow *win = event->window;
3628     GdkColor color = { 0, 0, 0, 65535 };
3629     GdkGC *gc = gdk_gc_new (win);
3630     gdk_gc_set_rgb_fg_color (gc, &color);
3631     gdk_draw_rectangle (win,
3632                         gc, TRUE,
3633                         event->area.x, event->area.y,
3634                         event->area.width, event->area.height);
3635     gdk_gc_unref (gc);
3636   }
3637 #endif
3638
3639   if (event->window == gtk_text_view_get_window (GTK_TEXT_VIEW (widget),
3640                                                  GTK_TEXT_WINDOW_TEXT))
3641     {
3642       DV(g_print (">Exposed ("G_STRLOC")\n"));
3643       gtk_text_view_paint (widget, &event->area);
3644     }
3645
3646   if (event->window == widget->window)
3647     gtk_text_view_draw_focus (widget);
3648
3649   return TRUE;
3650 }
3651
3652 static void
3653 gtk_text_view_draw_focus (GtkWidget *widget)
3654 {
3655   gboolean interior_focus;
3656
3657   /* We clear the focus if we are in interior focus mode. */
3658   gtk_widget_style_get (widget, "interior_focus", &interior_focus, NULL);
3659
3660   if (GTK_WIDGET_DRAWABLE (widget))
3661     {
3662       if (GTK_WIDGET_HAS_FOCUS (widget) && !interior_focus)
3663         {
3664           gtk_paint_focus (widget->style, widget->window,
3665                            NULL, widget, "textview",
3666                            0, 0,
3667                            widget->allocation.width - 1,
3668                            widget->allocation.height - 1);
3669         }
3670       else
3671         {
3672           gdk_window_clear (widget->window);
3673         }
3674     }
3675 }
3676
3677 static void
3678 gtk_text_view_grab_focus (GtkWidget *widget)
3679 {
3680   GtkTextView *text_view;
3681
3682   text_view = GTK_TEXT_VIEW (widget);
3683
3684   GTK_WIDGET_CLASS (parent_class)->grab_focus (widget);
3685
3686   if (!text_view->disable_scroll_on_focus)
3687     gtk_text_view_scroll_mark_onscreen (text_view,
3688                                         gtk_text_buffer_get_mark (get_buffer (text_view),
3689                                                                   "insert"));
3690 }
3691
3692 /*
3693  * Container
3694  */
3695
3696 static void
3697 gtk_text_view_add (GtkContainer *container,
3698                    GtkWidget    *child)
3699 {
3700   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
3701   g_return_if_fail (GTK_IS_WIDGET (child));
3702
3703   /* This is pretty random. */
3704   gtk_text_view_add_child_in_window (GTK_TEXT_VIEW (container),
3705                                      child,
3706                                      GTK_TEXT_WINDOW_WIDGET,
3707                                      0, 0);
3708 }
3709
3710 static void
3711 gtk_text_view_remove (GtkContainer *container,
3712                       GtkWidget    *child)
3713 {
3714   GSList *iter;
3715   GtkTextView *text_view;
3716   GtkTextViewChild *vc;
3717
3718   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
3719   g_return_if_fail (GTK_IS_WIDGET (child));
3720   g_return_if_fail (child->parent == (GtkWidget*) container);
3721
3722   text_view = GTK_TEXT_VIEW (container);
3723
3724   vc = NULL;
3725   iter = text_view->children;
3726
3727   while (iter != NULL)
3728     {
3729       vc = iter->data;
3730
3731       if (vc->widget == child)
3732         break;
3733
3734       iter = g_slist_next (iter);
3735     }
3736
3737   g_assert (iter != NULL); /* be sure we had the child in the list */
3738
3739   text_view->children = g_slist_remove (text_view->children, vc);
3740
3741   gtk_widget_unparent (vc->widget);
3742
3743   text_view_child_free (vc);
3744 }
3745
3746 static void
3747 gtk_text_view_forall (GtkContainer *container,
3748                       gboolean      include_internals,
3749                       GtkCallback   callback,
3750                       gpointer      callback_data)
3751 {
3752   GSList *iter;
3753   GtkTextView *text_view;
3754
3755   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
3756   g_return_if_fail (callback != NULL);
3757
3758   text_view = GTK_TEXT_VIEW (container);
3759
3760   iter = text_view->children;
3761
3762   while (iter != NULL)
3763     {
3764       GtkTextViewChild *vc = iter->data;
3765
3766       (* callback) (vc->widget, callback_data);
3767
3768       iter = g_slist_next (iter);
3769     }
3770 }
3771
3772 #define CURSOR_ON_MULTIPLIER 0.66
3773 #define CURSOR_OFF_MULTIPLIER 0.34
3774 #define CURSOR_PEND_MULTIPLIER 1.0
3775
3776 static gboolean
3777 cursor_blinks (GtkTextView *text_view)
3778 {
3779   GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
3780   gboolean blink;
3781
3782 #ifdef DEBUG_VALIDATION_AND_SCROLLING
3783   return FALSE;
3784 #endif
3785   if (gtk_debug_flags & GTK_DEBUG_UPDATES)
3786     return FALSE;
3787
3788   g_object_get (G_OBJECT (settings), "gtk-cursor-blink", &blink, NULL);
3789   return blink;
3790 }
3791
3792 static gint
3793 get_cursor_time (GtkTextView *text_view)
3794 {
3795   GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
3796   gint time;
3797
3798   g_object_get (G_OBJECT (settings), "gtk-cursor-blink-time", &time, NULL);
3799
3800   return time;
3801 }
3802
3803 /*
3804  * Blink!
3805  */
3806
3807 static gint
3808 blink_cb (gpointer data)
3809 {
3810   GtkTextView *text_view;
3811   gboolean visible;
3812
3813   GDK_THREADS_ENTER ();
3814
3815   text_view = GTK_TEXT_VIEW (data);
3816
3817   g_assert (text_view->layout);
3818   g_assert (GTK_WIDGET_HAS_FOCUS (text_view));
3819   g_assert (text_view->cursor_visible);
3820
3821   visible = gtk_text_layout_get_cursor_visible (text_view->layout);
3822
3823   if (visible)
3824     text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_OFF_MULTIPLIER,
3825                                                 blink_cb,
3826                                                 text_view);
3827   else
3828     text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_ON_MULTIPLIER,
3829                                                 blink_cb,
3830                                                 text_view);
3831
3832   gtk_text_layout_set_cursor_visible (text_view->layout,
3833                                       !visible);
3834
3835   GDK_THREADS_LEAVE ();
3836
3837   /* Remove ourselves */
3838   return FALSE;
3839 }
3840
3841
3842 static void
3843 gtk_text_view_stop_cursor_blink (GtkTextView *text_view)
3844 {
3845   if (text_view->blink_timeout)
3846     {
3847       gtk_timeout_remove (text_view->blink_timeout);
3848       text_view->blink_timeout = 0;
3849     }
3850 }
3851
3852 static void
3853 gtk_text_view_check_cursor_blink (GtkTextView *text_view)
3854 {
3855   if (text_view->layout != NULL &&
3856       text_view->cursor_visible &&
3857       GTK_WIDGET_HAS_FOCUS (text_view))
3858     {
3859       if (cursor_blinks (text_view))
3860         {
3861           if (text_view->blink_timeout == 0)
3862             {
3863               gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3864
3865               text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_OFF_MULTIPLIER,
3866                                                           blink_cb,
3867                                                           text_view);
3868             }
3869         }
3870       else
3871         gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3872     }
3873   else
3874     {
3875       gtk_text_view_stop_cursor_blink (text_view);
3876     }
3877 }
3878
3879 static void
3880 gtk_text_view_pend_cursor_blink(GtkTextView *text_view)
3881 {
3882   if (text_view->layout != NULL &&
3883       text_view->cursor_visible &&
3884       GTK_WIDGET_HAS_FOCUS (text_view) &&
3885       cursor_blinks (text_view))
3886     {
3887       if (text_view->blink_timeout != 0)
3888         {
3889           gtk_timeout_remove (text_view->blink_timeout);
3890           text_view->blink_timeout = 0;
3891         }
3892
3893       gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3894
3895       text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_PEND_MULTIPLIER,
3896                                                   blink_cb,
3897                                                   text_view);
3898     }
3899 }
3900
3901
3902 /*
3903  * Key binding handlers
3904  */
3905
3906 static void
3907 gtk_text_view_move_iter_by_lines (GtkTextView *text_view,
3908                                   GtkTextIter *newplace,
3909                                   gint         count)
3910 {
3911   while (count < 0)
3912     {
3913       gtk_text_layout_move_iter_to_previous_line (text_view->layout, newplace);
3914       count++;
3915     }
3916
3917   while (count > 0)
3918     {
3919       gtk_text_layout_move_iter_to_next_line (text_view->layout, newplace);
3920       count--;
3921     }
3922 }
3923
3924 static void
3925 gtk_text_view_move_cursor (GtkTextView     *text_view,
3926                            GtkMovementStep  step,
3927                            gint             count,
3928                            gboolean         extend_selection)
3929 {
3930   GtkTextIter insert;
3931   GtkTextIter newplace;
3932
3933   gint cursor_x_pos = 0;
3934
3935   gtk_text_view_reset_im_context (text_view);
3936
3937   if (step == GTK_MOVEMENT_PAGES)
3938     {
3939       gtk_text_view_scroll_pages (text_view, count);
3940       gtk_text_view_pend_cursor_blink (text_view);
3941       return;
3942     }
3943
3944   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
3945                                     gtk_text_buffer_get_mark (get_buffer (text_view),
3946                                                               "insert"));
3947   newplace = insert;
3948
3949   if (step == GTK_MOVEMENT_DISPLAY_LINES)
3950     gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, NULL);
3951
3952   switch (step)
3953     {
3954     case GTK_MOVEMENT_LOGICAL_POSITIONS:
3955       gtk_text_iter_forward_cursor_positions (&newplace, count);
3956       break;
3957
3958     case GTK_MOVEMENT_VISUAL_POSITIONS:
3959       gtk_text_layout_move_iter_visually (text_view->layout,
3960                                           &newplace, count);
3961       break;
3962
3963     case GTK_MOVEMENT_WORDS:
3964       if (count < 0)
3965         gtk_text_iter_backward_word_starts (&newplace, -count);
3966       else if (count > 0)
3967         gtk_text_iter_forward_word_ends (&newplace, count);
3968       break;
3969
3970     case GTK_MOVEMENT_DISPLAY_LINES:
3971       gtk_text_view_move_iter_by_lines (text_view, &newplace, count);
3972       gtk_text_layout_move_iter_to_x (text_view->layout, &newplace, cursor_x_pos);
3973       break;
3974
3975     case GTK_MOVEMENT_DISPLAY_LINE_ENDS:
3976       if (count > 1)
3977         gtk_text_view_move_iter_by_lines (text_view, &newplace, --count);
3978       else if (count < -1)
3979         gtk_text_view_move_iter_by_lines (text_view, &newplace, ++count);
3980
3981       if (count != 0)
3982         gtk_text_layout_move_iter_to_line_end (text_view->layout, &newplace, count);
3983       break;
3984
3985     case GTK_MOVEMENT_PARAGRAPHS:
3986       gtk_text_iter_forward_lines (&newplace, count);
3987       gtk_text_iter_set_line_offset (&newplace, 0);
3988       break;
3989
3990     case GTK_MOVEMENT_PARAGRAPH_ENDS:
3991       if (count > 0)
3992         gtk_text_iter_forward_to_line_end (&newplace);
3993       else if (count < 0)
3994         gtk_text_iter_set_line_offset (&newplace, 0);
3995       break;
3996
3997     case GTK_MOVEMENT_BUFFER_ENDS:
3998       if (count > 0)
3999         gtk_text_buffer_get_end_iter (get_buffer (text_view), &newplace);
4000       else if (count < 0)
4001         gtk_text_buffer_get_iter_at_offset (get_buffer (text_view), &newplace, 0);
4002       break;
4003
4004     default:
4005       break;
4006     }
4007
4008   if (!gtk_text_iter_equal (&insert, &newplace))
4009     {
4010       if (extend_selection)
4011         gtk_text_buffer_move_mark (get_buffer (text_view),
4012                                    gtk_text_buffer_get_mark (get_buffer (text_view),
4013                                                              "insert"),
4014                                    &newplace);
4015       else
4016         gtk_text_buffer_place_cursor (get_buffer (text_view), &newplace);
4017
4018       DV(g_print (G_STRLOC": scrolling onscreen\n"));
4019       gtk_text_view_scroll_mark_onscreen (text_view,
4020                                           gtk_text_buffer_get_mark (get_buffer (text_view),
4021                                                                     "insert"));
4022
4023       if (step == GTK_MOVEMENT_DISPLAY_LINES)
4024         {
4025           gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, -1);
4026         }
4027     }
4028
4029   gtk_text_view_pend_cursor_blink (text_view);
4030 }
4031
4032 static void
4033 gtk_text_view_set_anchor (GtkTextView *text_view)
4034 {
4035   GtkTextIter insert;
4036
4037   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
4038                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4039                                                               "insert"));
4040
4041   gtk_text_buffer_create_mark (get_buffer (text_view), "anchor", &insert, TRUE);
4042 }
4043
4044 static void
4045 gtk_text_view_scroll_pages (GtkTextView *text_view,
4046                             gint         count)
4047 {
4048   gdouble newval;
4049   GtkAdjustment *adj;
4050   gint cursor_x_pos, cursor_y_pos;
4051   GtkTextIter new_insert;
4052   GtkTextIter anchor;
4053   gint y0, y1;
4054
4055   g_return_if_fail (text_view->vadjustment != NULL);
4056
4057   adj = text_view->vadjustment;
4058
4059   /* Validate the region that will be brought into view by the cursor motion
4060    */
4061   if (count < 0)
4062     {
4063       gtk_text_view_get_first_para_iter (text_view, &anchor);
4064       y0 = adj->page_size;
4065       y1 = adj->page_size + count * adj->page_increment;
4066     }
4067   else
4068     {
4069       gtk_text_view_get_first_para_iter (text_view, &anchor);
4070       y0 = count * adj->page_increment + adj->page_size;
4071       y1 = 0;
4072     }
4073
4074   gtk_text_layout_validate_yrange (text_view->layout, &anchor, y0, y1);
4075   /* FIXME do we need to update the adjustment ranges here? */
4076
4077   gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, &cursor_y_pos);
4078
4079   newval = adj->value;
4080
4081   newval += count * adj->page_increment;
4082
4083   cursor_y_pos += newval - adj->value;
4084   set_adjustment_clamped (adj, newval);
4085
4086   gtk_text_layout_get_iter_at_pixel (text_view->layout, &new_insert, cursor_x_pos, cursor_y_pos);
4087   clamp_iter_onscreen (text_view, &new_insert);
4088   gtk_text_buffer_place_cursor (get_buffer (text_view), &new_insert);
4089
4090   gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, cursor_y_pos);
4091
4092   /* Adjust to have the cursor _entirely_ onscreen, move_mark_onscreen
4093    * only guarantees 1 pixel onscreen.
4094    */
4095   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4096   gtk_text_view_scroll_mark_onscreen (text_view,
4097                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4098                                                                 "insert"));
4099 }
4100
4101 static gboolean
4102 whitespace (gunichar ch, gpointer user_data)
4103 {
4104   return (ch == ' ' || ch == '\t');
4105 }
4106
4107 static gboolean
4108 not_whitespace (gunichar ch, gpointer user_data)
4109 {
4110   return !whitespace (ch, user_data);
4111 }
4112
4113 static gboolean
4114 find_whitepace_region (const GtkTextIter *center,
4115                        GtkTextIter *start, GtkTextIter *end)
4116 {
4117   *start = *center;
4118   *end = *center;
4119
4120   if (gtk_text_iter_backward_find_char (start, not_whitespace, NULL, NULL))
4121     gtk_text_iter_forward_char (start); /* we want the first whitespace... */
4122   if (whitespace (gtk_text_iter_get_char (end), NULL))
4123     gtk_text_iter_forward_find_char (end, not_whitespace, NULL, NULL);
4124
4125   return !gtk_text_iter_equal (start, end);
4126 }
4127
4128 static void
4129 gtk_text_view_insert_at_cursor (GtkTextView *text_view,
4130                                 const gchar *str)
4131 {
4132   gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
4133                                                 text_view->editable);
4134 }
4135
4136 static void
4137 gtk_text_view_delete_from_cursor (GtkTextView   *text_view,
4138                                   GtkDeleteType  type,
4139                                   gint           count)
4140 {
4141   GtkTextIter insert;
4142   GtkTextIter start;
4143   GtkTextIter end;
4144   gboolean leave_one = FALSE;
4145
4146   gtk_text_view_reset_im_context (text_view);
4147
4148   if (type == GTK_DELETE_CHARS)
4149     {
4150       /* Char delete deletes the selection, if one exists */
4151       if (gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
4152                                             text_view->editable))
4153         return;
4154     }
4155
4156   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4157                                     &insert,
4158                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4159                                                               "insert"));
4160
4161   start = insert;
4162   end = insert;
4163
4164   switch (type)
4165     {
4166     case GTK_DELETE_CHARS:
4167       gtk_text_iter_forward_cursor_positions (&end, count);
4168       break;
4169
4170     case GTK_DELETE_WORD_ENDS:
4171       if (count > 0)
4172         gtk_text_iter_forward_word_ends (&end, count);
4173       else if (count < 0)
4174         gtk_text_iter_backward_word_starts (&start, 0 - count);
4175       break;
4176
4177     case GTK_DELETE_WORDS:
4178       break;
4179
4180     case GTK_DELETE_DISPLAY_LINE_ENDS:
4181       break;
4182
4183     case GTK_DELETE_DISPLAY_LINES:
4184       break;
4185
4186     case GTK_DELETE_PARAGRAPH_ENDS:
4187       /* If we're already at a newline, we need to
4188        * simply delete that newline, instead of
4189        * moving to the next one.
4190        */
4191       if (gtk_text_iter_ends_line (&end))
4192         {
4193           gtk_text_iter_forward_line (&end);
4194           --count;
4195         }
4196
4197       while (count > 0)
4198         {
4199           if (!gtk_text_iter_forward_to_line_end (&end))
4200             break;
4201
4202           --count;
4203         }
4204
4205       /* FIXME figure out what a negative count means
4206          and support that */
4207       break;
4208
4209     case GTK_DELETE_PARAGRAPHS:
4210       if (count > 0)
4211         {
4212           gtk_text_iter_set_line_offset (&start, 0);
4213           gtk_text_iter_forward_to_line_end (&end);
4214
4215           /* Do the lines beyond the first. */
4216           while (count > 1)
4217             {
4218               gtk_text_iter_forward_to_line_end (&end);
4219
4220               --count;
4221             }
4222         }
4223
4224       /* FIXME negative count? */
4225
4226       break;
4227
4228     case GTK_DELETE_WHITESPACE:
4229       {
4230         find_whitepace_region (&insert, &start, &end);
4231       }
4232       break;
4233
4234     default:
4235       break;
4236     }
4237
4238   if (!gtk_text_iter_equal (&start, &end))
4239     {
4240       gtk_text_buffer_begin_user_action (get_buffer (text_view));
4241
4242       if (gtk_text_buffer_delete_interactive (get_buffer (text_view), &start, &end,
4243                                               text_view->editable))
4244         {
4245           if (leave_one)
4246             gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view),
4247                                                           " ", 1,
4248                                                           text_view->editable);
4249         }
4250
4251       gtk_text_buffer_end_user_action (get_buffer (text_view));
4252
4253       DV(g_print (G_STRLOC": scrolling onscreen\n"));
4254       gtk_text_view_scroll_mark_onscreen (text_view,
4255                                           gtk_text_buffer_get_mark (get_buffer (text_view), "insert"));
4256     }
4257 }
4258
4259 static void
4260 gtk_text_view_cut_clipboard (GtkTextView *text_view)
4261 {
4262   gtk_text_buffer_cut_clipboard (get_buffer (text_view),
4263                                  gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
4264                                  text_view->editable);
4265   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4266   gtk_text_view_scroll_mark_onscreen (text_view,
4267                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4268                                                                 "insert"));
4269 }
4270
4271 static void
4272 gtk_text_view_copy_clipboard (GtkTextView *text_view)
4273 {
4274   gtk_text_buffer_copy_clipboard (get_buffer (text_view),
4275                                   gtk_clipboard_get (GDK_SELECTION_CLIPBOARD));
4276   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4277   gtk_text_view_scroll_mark_onscreen (text_view,
4278                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4279                                                                 "insert"));
4280 }
4281
4282 static void
4283 gtk_text_view_paste_clipboard (GtkTextView *text_view)
4284 {
4285   gtk_text_buffer_paste_clipboard (get_buffer (text_view),
4286                                    gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
4287                                    NULL,
4288                                    text_view->editable);
4289   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4290   gtk_text_view_scroll_mark_onscreen (text_view,
4291                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4292                                                                 "insert"));
4293 }
4294
4295 static void
4296 gtk_text_view_toggle_overwrite (GtkTextView *text_view)
4297 {
4298   text_view->overwrite_mode = !text_view->overwrite_mode;
4299 }
4300
4301 /*
4302  * Selections
4303  */
4304
4305 static void
4306 gtk_text_view_unselect (GtkTextView *text_view)
4307 {
4308   GtkTextIter insert;
4309
4310   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4311                                     &insert,
4312                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4313                                                               "insert"));
4314
4315   gtk_text_buffer_move_mark (get_buffer (text_view),
4316                              gtk_text_buffer_get_mark (get_buffer (text_view),
4317                                                        "selection_bound"),
4318                              &insert);
4319 }
4320
4321 static void
4322 move_mark_to_pointer_and_scroll (GtkTextView *text_view,
4323                                  const gchar *mark_name)
4324 {
4325   gint x, y;
4326   GdkModifierType state;
4327   GtkTextIter newplace;
4328
4329   /*   DV(g_print (G_STRLOC": begin\n")); */
4330
4331   gdk_window_get_pointer (text_view->text_window->bin_window,
4332                           &x, &y, &state);
4333
4334   /*   DV(g_print (G_STRLOC": get iter at pixel\n"); */
4335   gtk_text_layout_get_iter_at_pixel (text_view->layout,
4336                                      &newplace,
4337                                      x + text_view->xoffset,
4338                                      y + text_view->yoffset);
4339
4340   {
4341     GtkTextMark *mark =
4342       gtk_text_buffer_get_mark (get_buffer (text_view), mark_name);
4343
4344     DV(g_print (G_STRLOC": move mark\n"));
4345     gtk_text_buffer_move_mark (get_buffer (text_view),
4346                                mark,
4347                                &newplace);
4348
4349     DV(g_print (G_STRLOC": scrolling onscreen\n"));
4350     gtk_text_view_scroll_mark_onscreen (text_view, mark);
4351   }
4352 }
4353
4354 static gint
4355 selection_scan_timeout (gpointer data)
4356 {
4357   GtkTextView *text_view;
4358
4359   GDK_THREADS_ENTER ();
4360
4361   text_view = GTK_TEXT_VIEW (data);
4362
4363   DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
4364   move_mark_to_pointer_and_scroll (text_view, "insert");
4365
4366   GDK_THREADS_LEAVE ();
4367
4368   return TRUE; /* remain installed. */
4369 }
4370
4371 #define DND_SCROLL_MARGIN 0.20
4372
4373 static gint
4374 drag_scan_timeout (gpointer data)
4375 {
4376   GtkTextView *text_view;
4377   gint x, y;
4378   GdkModifierType state;
4379   GtkTextIter newplace;
4380
4381   GDK_THREADS_ENTER ();
4382
4383   text_view = GTK_TEXT_VIEW (data);
4384
4385   gdk_window_get_pointer (text_view->text_window->bin_window,
4386                           &x, &y, &state);
4387
4388   gtk_text_layout_get_iter_at_pixel (text_view->layout,
4389                                      &newplace,
4390                                      x + text_view->xoffset,
4391                                      y + text_view->yoffset);
4392
4393   gtk_text_buffer_move_mark (get_buffer (text_view),
4394                              text_view->dnd_mark,
4395                              &newplace);
4396
4397   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4398   gtk_text_view_scroll_to_mark (text_view,
4399                                 text_view->dnd_mark,
4400                                 DND_SCROLL_MARGIN, FALSE, 0.0, 0.0);
4401
4402   GDK_THREADS_LEAVE ();
4403
4404   return TRUE;
4405 }
4406
4407 static gint
4408 selection_motion_event_handler (GtkTextView *text_view, GdkEventMotion *event, gpointer data)
4409 {
4410   DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
4411   move_mark_to_pointer_and_scroll (text_view, "insert");
4412
4413   /* If we had to scroll offscreen, insert a timeout to do so
4414    * again. Note that in the timeout, even if the mouse doesn't
4415    * move, due to this scroll xoffset/yoffset will have changed
4416    * and we'll need to scroll again.
4417    */
4418   if (text_view->scroll_timeout != 0) /* reset on every motion event */
4419     gtk_timeout_remove (text_view->scroll_timeout);
4420
4421   text_view->scroll_timeout =
4422     gtk_timeout_add (50, selection_scan_timeout, text_view);
4423
4424   return TRUE;
4425 }
4426
4427 static void
4428 gtk_text_view_start_selection_drag (GtkTextView       *text_view,
4429                                     const GtkTextIter *iter,
4430                                     GdkEventButton    *button)
4431 {
4432   GtkTextIter newplace;
4433
4434   g_return_if_fail (text_view->selection_drag_handler == 0);
4435
4436   gtk_grab_add (GTK_WIDGET (text_view));
4437
4438   newplace = *iter;
4439
4440   gtk_text_buffer_place_cursor (get_buffer (text_view), &newplace);
4441
4442   text_view->selection_drag_handler = gtk_signal_connect (GTK_OBJECT (text_view),
4443                                                           "motion_notify_event",
4444                                                           GTK_SIGNAL_FUNC (selection_motion_event_handler),
4445                                                           NULL);
4446 }
4447
4448 /* returns whether we were really dragging */
4449 static gboolean
4450 gtk_text_view_end_selection_drag (GtkTextView *text_view, GdkEventButton *event)
4451 {
4452   if (text_view->selection_drag_handler == 0)
4453     return FALSE;
4454
4455   gtk_signal_disconnect (GTK_OBJECT (text_view), text_view->selection_drag_handler);
4456   text_view->selection_drag_handler = 0;
4457
4458   if (text_view->scroll_timeout != 0)
4459     {
4460       gtk_timeout_remove (text_view->scroll_timeout);
4461       text_view->scroll_timeout = 0;
4462     }
4463
4464   /* one last update to current position */
4465   DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
4466   move_mark_to_pointer_and_scroll (text_view, "insert");
4467
4468   gtk_grab_remove (GTK_WIDGET (text_view));
4469
4470   return TRUE;
4471 }
4472
4473 /*
4474  * Layout utils
4475  */
4476
4477 static void
4478 gtk_text_view_set_attributes_from_style (GtkTextView        *text_view,
4479                                          GtkTextAttributes  *values,
4480                                          GtkStyle           *style)
4481 {
4482   values->appearance.bg_color = style->base[GTK_STATE_NORMAL];
4483   values->appearance.fg_color = style->text[GTK_STATE_NORMAL];
4484
4485   if (values->font)
4486     pango_font_description_free (values->font);
4487
4488   values->font = pango_font_description_copy (style->font_desc);
4489 }
4490
4491 static void
4492 gtk_text_view_check_keymap_direction (GtkTextView *text_view)
4493 {
4494   if (text_view->layout)
4495     {
4496       gboolean split_cursor;
4497       GtkTextDirection new_dir;
4498       GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
4499
4500       g_object_get (G_OBJECT (settings),
4501                     "gtk-split-cursor", &split_cursor,
4502                     NULL);
4503       if (split_cursor)
4504         new_dir = GTK_TEXT_DIR_NONE;
4505       else
4506         new_dir = (gdk_keymap_get_direction (gdk_keymap_get_default ()) == PANGO_DIRECTION_LTR) ?
4507           GTK_TEXT_DIR_LTR : GTK_TEXT_DIR_RTL;
4508
4509       if (text_view->layout->cursor_direction != new_dir)
4510         gtk_text_layout_set_cursor_direction (text_view->layout, new_dir);
4511     }
4512 }
4513
4514 static void
4515 gtk_text_view_ensure_layout (GtkTextView *text_view)
4516 {
4517   GtkWidget *widget;
4518
4519   widget = GTK_WIDGET (text_view);
4520
4521   if (text_view->layout == NULL)
4522     {
4523       GtkTextAttributes *style;
4524       PangoContext *ltr_context, *rtl_context;
4525       GSList *tmp_list;
4526
4527       DV(g_print(G_STRLOC"\n"));
4528
4529       text_view->layout = gtk_text_layout_new ();
4530
4531       g_signal_connect (G_OBJECT (text_view->layout),
4532                         "invalidated",
4533                         G_CALLBACK (invalidated_handler),
4534                         text_view);
4535
4536       g_signal_connect (G_OBJECT (text_view->layout),
4537                         "changed",
4538                         G_CALLBACK (changed_handler),
4539                         text_view);
4540
4541       g_signal_connect (G_OBJECT (text_view->layout),
4542                         "allocate_child",
4543                         G_CALLBACK (gtk_text_view_child_allocated),
4544                         text_view);
4545
4546       if (get_buffer (text_view))
4547         gtk_text_layout_set_buffer (text_view->layout, get_buffer (text_view));
4548
4549       if ((GTK_WIDGET_HAS_FOCUS (text_view) && text_view->cursor_visible))
4550         gtk_text_view_pend_cursor_blink (text_view);
4551       else
4552         gtk_text_layout_set_cursor_visible (text_view->layout, FALSE);
4553
4554       ltr_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
4555       pango_context_set_base_dir (ltr_context, PANGO_DIRECTION_LTR);
4556       rtl_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
4557       pango_context_set_base_dir (rtl_context, PANGO_DIRECTION_RTL);
4558
4559       gtk_text_layout_set_contexts (text_view->layout, ltr_context, rtl_context);
4560
4561       g_object_unref (G_OBJECT (ltr_context));
4562       g_object_unref (G_OBJECT (rtl_context));
4563
4564       gtk_text_view_check_keymap_direction (text_view);
4565
4566       style = gtk_text_attributes_new ();
4567
4568       gtk_widget_ensure_style (widget);
4569       gtk_text_view_set_attributes_from_style (text_view,
4570                                                style, widget->style);
4571
4572       style->pixels_above_lines = text_view->pixels_above_lines;
4573       style->pixels_below_lines = text_view->pixels_below_lines;
4574       style->pixels_inside_wrap = text_view->pixels_inside_wrap;
4575       style->left_margin = text_view->left_margin;
4576       style->right_margin = text_view->right_margin;
4577       style->indent = text_view->indent;
4578       style->tabs = text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
4579
4580       style->wrap_mode = text_view->wrap_mode;
4581       style->justification = text_view->justify;
4582       style->direction = gtk_widget_get_direction (GTK_WIDGET (text_view));
4583
4584       gtk_text_layout_set_default_style (text_view->layout, style);
4585
4586       gtk_text_attributes_unref (style);
4587
4588       /* Set layout for all anchored children */
4589
4590       tmp_list = text_view->children;
4591       while (tmp_list != NULL)
4592         {
4593           GtkTextViewChild *vc = tmp_list->data;
4594
4595           if (vc->anchor)
4596             {
4597               gtk_text_anchored_child_set_layout (vc->widget,
4598                                                   text_view->layout);
4599               /* vc may now be invalid! */
4600             }
4601
4602           tmp_list = g_slist_next (tmp_list);
4603         }
4604     }
4605 }
4606
4607 /**
4608  * gtk_text_view_get_default_attributes:
4609  * @text_view: a #GtkTextView
4610  *
4611  * Obtains a copy of the default text attributes. These are the
4612  * attributes used for text unless a tag overrides them.
4613  * You'd typically pass the default attributes in to
4614  * gtk_text_tag_get_attributes() in order to get the
4615  * attributes in effect at a given text position.
4616  *
4617  * The return value is a copy owned by the caller of this function,
4618  * and should be freed.
4619  *
4620  * Return value: a new #GtkTextAttributes
4621  **/
4622 GtkTextAttributes*
4623 gtk_text_view_get_default_attributes (GtkTextView *text_view)
4624 {
4625   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
4626
4627   gtk_text_view_ensure_layout (text_view);
4628
4629   return gtk_text_attributes_copy (text_view->layout->default_style);
4630 }
4631
4632 static void
4633 gtk_text_view_destroy_layout (GtkTextView *text_view)
4634 {
4635   if (text_view->layout)
4636     {
4637       GSList *tmp_list;
4638
4639       if (text_view->incremental_validate_idle)
4640         {
4641           g_source_remove (text_view->incremental_validate_idle);
4642           text_view->incremental_validate_idle = 0;
4643         }
4644
4645       /* Remove layout from all anchored children */
4646
4647       tmp_list = text_view->children;
4648       while (tmp_list != NULL)
4649         {
4650           GtkTextViewChild *vc = tmp_list->data;
4651
4652           if (vc->anchor)
4653             {
4654               gtk_text_anchored_child_set_layout (vc->widget, NULL);
4655               /* vc may now be invalid! */
4656             }
4657
4658           tmp_list = g_slist_next (tmp_list);
4659         }
4660
4661       gtk_text_view_stop_cursor_blink (text_view);
4662       gtk_text_view_end_selection_drag (text_view, NULL);
4663
4664       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->layout),
4665                                             invalidated_handler, text_view);
4666       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->layout),
4667                                             changed_handler, text_view);
4668       g_object_unref (G_OBJECT (text_view->layout));
4669       text_view->layout = NULL;
4670     }
4671 }
4672
4673 static void
4674 gtk_text_view_reset_im_context (GtkTextView *text_view)
4675 {
4676   if (text_view->need_im_reset)
4677     {
4678       text_view->need_im_reset = FALSE;
4679       gtk_im_context_reset (text_view->im_context);
4680       gtk_text_view_update_im_spot_location (text_view);
4681     }
4682 }
4683
4684 /*
4685  * DND feature
4686  */
4687
4688 static void
4689 gtk_text_view_start_selection_dnd (GtkTextView       *text_view,
4690                                    const GtkTextIter *iter,
4691                                    GdkEventMotion    *event)
4692 {
4693   GdkDragContext *context;
4694   GtkTargetList *target_list;
4695
4696   text_view->drag_start_x = -1;
4697   text_view->drag_start_y = -1;
4698   text_view->pending_place_cursor_button = 0;
4699
4700   target_list = gtk_target_list_new (target_table,
4701                                      G_N_ELEMENTS (target_table));
4702
4703   context = gtk_drag_begin (GTK_WIDGET (text_view), target_list,
4704                             GDK_ACTION_COPY | GDK_ACTION_MOVE,
4705                             1, (GdkEvent*)event);
4706
4707   gtk_target_list_unref (target_list);
4708
4709   gtk_drag_set_icon_default (context);
4710 }
4711
4712 static void
4713 gtk_text_view_drag_begin (GtkWidget        *widget,
4714                           GdkDragContext   *context)
4715 {
4716   /* do nothing */
4717 }
4718
4719 static void
4720 gtk_text_view_drag_end (GtkWidget        *widget,
4721                         GdkDragContext   *context)
4722 {
4723   GtkTextView *text_view;
4724
4725   text_view = GTK_TEXT_VIEW (widget);
4726 }
4727
4728 static void
4729 gtk_text_view_drag_data_get (GtkWidget        *widget,
4730                              GdkDragContext   *context,
4731                              GtkSelectionData *selection_data,
4732                              guint             info,
4733                              guint             time)
4734 {
4735   GtkTextView *text_view;
4736
4737   text_view = GTK_TEXT_VIEW (widget);
4738
4739   if (selection_data->target == gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE))
4740     {
4741       GtkTextBuffer *buffer = gtk_text_view_get_buffer (text_view);
4742
4743       gtk_selection_data_set (selection_data,
4744                               gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE),
4745                               8, /* bytes */
4746                               (void*)&buffer,
4747                               sizeof (buffer));
4748     }
4749   else
4750     {
4751       gchar *str;
4752       GtkTextIter start;
4753       GtkTextIter end;
4754
4755       str = NULL;
4756
4757       if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
4758                                                 &start, &end))
4759         {
4760           /* Extract the selected text */
4761           str = gtk_text_iter_get_visible_text (&start, &end);
4762         }
4763
4764       if (str)
4765         {
4766           gtk_selection_data_set_text (selection_data, str);
4767           g_free (str);
4768         }
4769     }
4770 }
4771
4772 static void
4773 gtk_text_view_drag_data_delete (GtkWidget        *widget,
4774                                 GdkDragContext   *context)
4775 {
4776   GtkTextView *text_view;
4777
4778   text_view = GTK_TEXT_VIEW (widget);
4779
4780   gtk_text_buffer_delete_selection (GTK_TEXT_VIEW (widget)->buffer,
4781                                     TRUE, GTK_TEXT_VIEW (widget)->editable);
4782 }
4783
4784 static void
4785 gtk_text_view_drag_leave (GtkWidget        *widget,
4786                           GdkDragContext   *context,
4787                           guint             time)
4788 {
4789   GtkTextView *text_view;
4790
4791   text_view = GTK_TEXT_VIEW (widget);
4792
4793   gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
4794
4795   if (text_view->scroll_timeout != 0)
4796     gtk_timeout_remove (text_view->scroll_timeout);
4797
4798   text_view->scroll_timeout = 0;
4799 }
4800
4801 static gboolean
4802 gtk_text_view_drag_motion (GtkWidget        *widget,
4803                            GdkDragContext   *context,
4804                            gint              x,
4805                            gint              y,
4806                            guint             time)
4807 {
4808   GtkTextIter newplace;
4809   GtkTextView *text_view;
4810   GtkTextIter start;
4811   GtkTextIter end;
4812   GdkRectangle target_rect;
4813   gint bx, by;
4814   GdkDragAction suggested_action = 0;
4815
4816   text_view = GTK_TEXT_VIEW (widget);
4817
4818   target_rect = text_view->text_window->allocation;
4819
4820   if (x < target_rect.x ||
4821       y < target_rect.y ||
4822       x > (target_rect.x + target_rect.width) ||
4823       y > (target_rect.y + target_rect.height))
4824     return FALSE; /* outside the text window, allow parent widgets to handle event */
4825
4826   gtk_text_view_window_to_buffer_coords (text_view,
4827                                          GTK_TEXT_WINDOW_WIDGET,
4828                                          x, y,
4829                                          &bx, &by);
4830
4831   gtk_text_layout_get_iter_at_pixel (text_view->layout,
4832                                      &newplace,
4833                                      bx, by);
4834
4835   if (gtk_drag_dest_find_target (widget, context,
4836                                  gtk_drag_dest_get_target_list (widget)) == GDK_NONE)
4837     {
4838       /* can't accept any of the offered targets */
4839     }
4840   else if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
4841                                             &start, &end) &&
4842            gtk_text_iter_in_range (&newplace, &start, &end))
4843     {
4844       /* We're inside the selection. */
4845     }
4846   else
4847     {
4848       if (gtk_text_iter_can_insert (&newplace, text_view->editable))
4849         {
4850           GtkWidget *source_widget;
4851
4852           suggested_action = context->suggested_action;
4853
4854           source_widget = gtk_drag_get_source_widget (context);
4855
4856           if (source_widget == widget)
4857             {
4858               /* Default to MOVE, unless the user has
4859                * pressed ctrl or alt to affect available actions
4860                */
4861               if ((context->actions & GDK_ACTION_MOVE) != 0)
4862                 suggested_action = GDK_ACTION_MOVE;
4863             }
4864         }
4865       else
4866         {
4867           /* Can't drop here. */
4868         }
4869     }
4870
4871   if (suggested_action != 0)
4872     {
4873       gtk_text_mark_set_visible (text_view->dnd_mark,
4874                                  text_view->cursor_visible);
4875
4876       gdk_drag_status (context, suggested_action, time);
4877     }
4878   else
4879     {
4880       gdk_drag_status (context, 0, time);
4881       gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
4882     }
4883
4884   gtk_text_buffer_move_mark (get_buffer (text_view),
4885                              text_view->dnd_mark,
4886                              &newplace);
4887
4888   DV(g_print (G_STRLOC": scrolling to mark\n"));
4889   gtk_text_view_scroll_to_mark (text_view,
4890                                 text_view->dnd_mark,
4891                                 DND_SCROLL_MARGIN, FALSE, 0.0, 0.0);
4892
4893   if (text_view->scroll_timeout != 0) /* reset on every motion event */
4894     gtk_timeout_remove (text_view->scroll_timeout);
4895
4896   text_view->scroll_timeout =
4897     gtk_timeout_add (50, drag_scan_timeout, text_view);
4898
4899   /* TRUE return means don't propagate the drag motion to parent
4900    * widgets that may also be drop sites.
4901    */
4902   return TRUE;
4903 }
4904
4905 static gboolean
4906 gtk_text_view_drag_drop (GtkWidget        *widget,
4907                          GdkDragContext   *context,
4908                          gint              x,
4909                          gint              y,
4910                          guint             time)
4911 {
4912   GtkTextView *text_view;
4913   GtkTextIter drop_point;
4914   GdkAtom target = GDK_NONE;
4915
4916   text_view = GTK_TEXT_VIEW (widget);
4917
4918   if (text_view->scroll_timeout != 0)
4919     gtk_timeout_remove (text_view->scroll_timeout);
4920
4921   text_view->scroll_timeout = 0;
4922
4923   gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
4924
4925   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4926                                     &drop_point,
4927                                     text_view->dnd_mark);
4928
4929   if (gtk_text_iter_can_insert (&drop_point, text_view->editable))
4930     target = gtk_drag_dest_find_target (widget, context, NULL);
4931
4932   if (target != GDK_NONE)
4933     gtk_drag_get_data (widget, context, target, time);
4934   else
4935     gtk_drag_finish (context, FALSE, FALSE, time);
4936
4937   return TRUE;
4938 }
4939
4940 static void
4941 insert_text_data (GtkTextView      *text_view,
4942                   GtkTextIter      *drop_point,
4943                   GtkSelectionData *selection_data)
4944 {
4945   gchar *str;
4946
4947   str = gtk_selection_data_get_text (selection_data);
4948
4949   if (str)
4950     {
4951       gtk_text_buffer_insert_interactive (get_buffer (text_view),
4952                                           drop_point, str, -1,
4953                                           text_view->editable);
4954       g_free (str);
4955     }
4956 }
4957
4958 static void
4959 gtk_text_view_drag_data_received (GtkWidget        *widget,
4960                                   GdkDragContext   *context,
4961                                   gint              x,
4962                                   gint              y,
4963                                   GtkSelectionData *selection_data,
4964                                   guint             info,
4965                                   guint             time)
4966 {
4967   GtkTextIter drop_point;
4968   GtkTextView *text_view;
4969   gboolean success = FALSE;
4970
4971   text_view = GTK_TEXT_VIEW (widget);
4972
4973   if (!text_view->dnd_mark)
4974     goto done;
4975
4976   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4977                                     &drop_point,
4978                                     text_view->dnd_mark);
4979
4980   if (!gtk_text_iter_can_insert (&drop_point, text_view->editable))
4981     goto done;
4982
4983   if (selection_data->target == gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE))
4984     {
4985       GtkTextBuffer *src_buffer = NULL;
4986       GtkTextIter start, end;
4987       gboolean copy_tags = TRUE;
4988
4989       if (selection_data->length != sizeof (src_buffer))
4990         return;
4991
4992       memcpy (&src_buffer, selection_data->data, sizeof (src_buffer));
4993
4994       if (src_buffer == NULL)
4995         return;
4996
4997       g_return_if_fail (GTK_IS_TEXT_BUFFER (src_buffer));
4998
4999       if (gtk_text_buffer_get_tag_table (src_buffer) !=
5000           gtk_text_buffer_get_tag_table (get_buffer (text_view)))
5001         copy_tags = FALSE;
5002
5003       if (gtk_text_buffer_get_selection_bounds (src_buffer,
5004                                                 &start,
5005                                                 &end))
5006         {
5007           if (copy_tags)
5008             gtk_text_buffer_insert_range_interactive (get_buffer (text_view),
5009                                                       &drop_point,
5010                                                       &start,
5011                                                       &end,
5012                                                       text_view->editable);
5013           else
5014             {
5015               gchar *str;
5016
5017               str = gtk_text_iter_get_visible_text (&start, &end);
5018               gtk_text_buffer_insert_interactive (get_buffer (text_view),
5019                                                   &drop_point, str, -1,
5020                                                   text_view->editable);
5021               g_free (str);
5022             }
5023         }
5024     }
5025   else
5026     insert_text_data (text_view, &drop_point, selection_data);
5027
5028   success = TRUE;
5029
5030  done:
5031   gtk_drag_finish (context, success,
5032                    success && context->action == GDK_ACTION_MOVE,
5033                    time);
5034 }
5035
5036 static GtkAdjustment*
5037 get_hadjustment (GtkTextView *text_view)
5038 {
5039   if (text_view->hadjustment == NULL)
5040     gtk_text_view_set_scroll_adjustments (text_view,
5041                                           NULL, /* forces creation */
5042                                           text_view->vadjustment);
5043
5044   return text_view->hadjustment;
5045 }
5046
5047 static GtkAdjustment*
5048 get_vadjustment (GtkTextView *text_view)
5049 {
5050   if (text_view->vadjustment == NULL)
5051     gtk_text_view_set_scroll_adjustments (text_view,
5052                                           text_view->hadjustment,
5053                                           NULL); /* forces creation */
5054   return text_view->vadjustment;
5055 }
5056
5057
5058 static void
5059 gtk_text_view_set_scroll_adjustments (GtkTextView   *text_view,
5060                                       GtkAdjustment *hadj,
5061                                       GtkAdjustment *vadj)
5062 {
5063   gboolean need_adjust = FALSE;
5064
5065   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
5066
5067   if (hadj)
5068     g_return_if_fail (GTK_IS_ADJUSTMENT (hadj));
5069   else
5070     hadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
5071   if (vadj)
5072     g_return_if_fail (GTK_IS_ADJUSTMENT (vadj));
5073   else
5074     vadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
5075
5076   if (text_view->hadjustment && (text_view->hadjustment != hadj))
5077     {
5078       gtk_signal_disconnect_by_data (GTK_OBJECT (text_view->hadjustment), text_view);
5079       g_object_unref (G_OBJECT (text_view->hadjustment));
5080     }
5081
5082   if (text_view->vadjustment && (text_view->vadjustment != vadj))
5083     {
5084       gtk_signal_disconnect_by_data (GTK_OBJECT (text_view->vadjustment), text_view);
5085       g_object_unref (G_OBJECT (text_view->vadjustment));
5086     }
5087
5088   if (text_view->hadjustment != hadj)
5089     {
5090       text_view->hadjustment = hadj;
5091       g_object_ref (G_OBJECT (text_view->hadjustment));
5092       gtk_object_sink (GTK_OBJECT (text_view->hadjustment));
5093
5094       gtk_signal_connect (GTK_OBJECT (text_view->hadjustment), "value_changed",
5095                           (GtkSignalFunc) gtk_text_view_value_changed,
5096                           text_view);
5097       need_adjust = TRUE;
5098     }
5099
5100   if (text_view->vadjustment != vadj)
5101     {
5102       text_view->vadjustment = vadj;
5103       g_object_ref (G_OBJECT (text_view->vadjustment));
5104       gtk_object_sink (GTK_OBJECT (text_view->vadjustment));
5105
5106       gtk_signal_connect (GTK_OBJECT (text_view->vadjustment), "value_changed",
5107                           (GtkSignalFunc) gtk_text_view_value_changed,
5108                           text_view);
5109       need_adjust = TRUE;
5110     }
5111
5112   if (need_adjust)
5113     gtk_text_view_value_changed (NULL, text_view);
5114 }
5115
5116 static void
5117 gtk_text_view_value_changed (GtkAdjustment *adj,
5118                              GtkTextView   *text_view)
5119 {
5120   GtkTextIter iter;
5121   gint line_top;
5122   gint dx = 0;
5123   gint dy = 0;
5124
5125   text_view->onscreen_validated = FALSE;
5126
5127   DV(g_print(">Scroll offset changed, onscreen_validated = FALSE ("G_STRLOC")\n"));
5128
5129   if (adj == text_view->hadjustment)
5130     {
5131       dx = text_view->xoffset - (gint)adj->value;
5132       text_view->xoffset = adj->value;
5133     }
5134   else if (adj == text_view->vadjustment)
5135     {
5136       dy = text_view->yoffset - (gint)adj->value;
5137       text_view->yoffset = adj->value;
5138
5139       if (text_view->layout)
5140         {
5141           gtk_text_layout_get_line_at_y (text_view->layout, &iter, adj->value, &line_top);
5142
5143           gtk_text_buffer_move_mark (get_buffer (text_view), text_view->first_para_mark, &iter);
5144
5145           text_view->first_para_pixels = adj->value - line_top;
5146         }
5147     }
5148
5149   if (GTK_WIDGET_REALIZED (text_view) && (dx != 0 || dy != 0))
5150     {
5151       if (dy != 0)
5152         {
5153           if (text_view->left_window)
5154             text_window_scroll (text_view->left_window, 0, dy);
5155           if (text_view->right_window)
5156             text_window_scroll (text_view->right_window, 0, dy);
5157         }
5158
5159       if (dx != 0)
5160         {
5161           if (text_view->top_window)
5162             text_window_scroll (text_view->top_window, dx, 0);
5163           if (text_view->bottom_window)
5164             text_window_scroll (text_view->bottom_window, dx, 0);
5165         }
5166
5167       /* It looks nicer to scroll the main area last, because
5168        * it takes a while, and making the side areas update
5169        * afterward emphasizes the slowness of scrolling the
5170        * main area.
5171        */
5172       text_window_scroll (text_view->text_window, dx, dy);
5173     }
5174
5175   /* This could result in invalidation, which would install the
5176    * first_validate_idle, which would validate onscreen;
5177    * but we're going to go ahead and validate here, so
5178    * first_validate_idle shouldn't have anything to do.
5179    */
5180   gtk_text_view_update_layout_width (text_view);
5181
5182   /* note that validation of onscreen could invoke this function
5183    * recursively, by scrolling to maintain first_para, or in response
5184    * to updating the layout width, however there is no problem with
5185    * that, or shouldn't be.
5186    */
5187   gtk_text_view_validate_onscreen (text_view);
5188
5189   /* process exposes */
5190   if (GTK_WIDGET_REALIZED (text_view))
5191     {
5192       if (text_view->left_window)
5193         gdk_window_process_updates (text_view->left_window->bin_window, TRUE);
5194
5195       if (text_view->right_window)
5196         gdk_window_process_updates (text_view->right_window->bin_window, TRUE);
5197
5198       if (text_view->top_window)
5199         gdk_window_process_updates (text_view->top_window->bin_window, TRUE);
5200
5201       if (text_view->bottom_window)
5202         gdk_window_process_updates (text_view->bottom_window->bin_window, TRUE);
5203
5204       gdk_window_process_updates (text_view->text_window->bin_window, TRUE);
5205     }
5206
5207   /* If this got installed, get rid of it, it's just a waste of time. */
5208   if (text_view->first_validate_idle != 0)
5209     {
5210       g_source_remove (text_view->first_validate_idle);
5211       text_view->first_validate_idle = 0;
5212     }
5213
5214   gtk_text_view_update_im_spot_location (text_view);
5215
5216   DV(g_print(">End scroll offset changed handler ("G_STRLOC")\n"));
5217 }
5218
5219 static void
5220 gtk_text_view_commit_handler (GtkIMContext  *context,
5221                               const gchar   *str,
5222                               GtkTextView   *text_view)
5223 {
5224   gboolean had_selection;
5225
5226   gtk_text_buffer_begin_user_action (get_buffer (text_view));
5227
5228   had_selection = gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
5229                                                         NULL, NULL);
5230
5231   gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
5232                                     text_view->editable);
5233
5234   if (!strcmp (str, "\n"))
5235     {
5236       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\n", 1,
5237                                                     text_view->editable);
5238     }
5239   else
5240     {
5241       if (!had_selection && text_view->overwrite_mode)
5242         gtk_text_view_delete_from_cursor (text_view, GTK_DELETE_CHARS, 1);
5243       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
5244                                                     text_view->editable);
5245     }
5246
5247   gtk_text_buffer_end_user_action (get_buffer (text_view));
5248
5249   DV(g_print (G_STRLOC": scrolling onscreen\n"));
5250   gtk_text_view_scroll_mark_onscreen (text_view,
5251                                       gtk_text_buffer_get_mark (get_buffer (text_view),
5252                                                                 "insert"));
5253 }
5254
5255 static void
5256 gtk_text_view_preedit_changed_handler (GtkIMContext *context,
5257                                        GtkTextView  *text_view)
5258 {
5259   gchar *str;
5260   PangoAttrList *attrs;
5261   gint cursor_pos;
5262
5263   gtk_im_context_get_preedit_string (context, &str, &attrs, &cursor_pos);
5264   gtk_text_layout_set_preedit_string (text_view->layout, str, attrs, cursor_pos);
5265
5266   pango_attr_list_unref (attrs);
5267   g_free (str);
5268 }
5269
5270 static void
5271 gtk_text_view_mark_set_handler (GtkTextBuffer     *buffer,
5272                                 const GtkTextIter *location,
5273                                 GtkTextMark       *mark,
5274                                 gpointer           data)
5275 {
5276   GtkTextView *text_view = GTK_TEXT_VIEW (data);
5277   gboolean need_reset = FALSE;
5278
5279   if (mark == gtk_text_buffer_get_insert (buffer))
5280     {
5281       text_view->virtual_cursor_x = -1;
5282       text_view->virtual_cursor_y = -1;
5283       need_reset = TRUE;
5284     }
5285   else if (mark == gtk_text_buffer_get_selection_bound (buffer))
5286     {
5287       need_reset = TRUE;
5288     }
5289
5290   if (need_reset)
5291     gtk_text_view_reset_im_context (text_view);
5292 }
5293
5294 static void
5295 gtk_text_view_get_virtual_cursor_pos (GtkTextView *text_view,
5296                                       gint        *x,
5297                                       gint        *y)
5298 {
5299   GdkRectangle strong_pos;
5300   GtkTextIter insert;
5301
5302   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
5303                                     gtk_text_buffer_get_mark (get_buffer (text_view),
5304                                                               "insert"));
5305
5306   if ((x && text_view->virtual_cursor_x == -1) ||
5307       (y && text_view->virtual_cursor_y == -1))
5308     gtk_text_layout_get_cursor_locations (text_view->layout, &insert, &strong_pos, NULL);
5309
5310   if (x)
5311     {
5312       if (text_view->virtual_cursor_x != -1)
5313         *x = text_view->virtual_cursor_x;
5314       else
5315         *x = strong_pos.x;
5316     }
5317
5318   if (y)
5319     {
5320       if (text_view->virtual_cursor_x != -1)
5321         *y = text_view->virtual_cursor_y;
5322       else
5323         *y = strong_pos.y + strong_pos.height / 2;
5324     }
5325 }
5326
5327 static void
5328 gtk_text_view_set_virtual_cursor_pos (GtkTextView *text_view,
5329                                       gint         x,
5330                                       gint         y)
5331 {
5332   GdkRectangle strong_pos;
5333   GtkTextIter insert;
5334
5335   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
5336                                     gtk_text_buffer_get_mark (get_buffer (text_view),
5337                                                               "insert"));
5338
5339   if (x == -1 || y == -1)
5340     gtk_text_layout_get_cursor_locations (text_view->layout, &insert, &strong_pos, NULL);
5341
5342   text_view->virtual_cursor_x = (x == -1) ? strong_pos.x : x;
5343   text_view->virtual_cursor_y = (y == -1) ? strong_pos.y + strong_pos.height / 2 : y;
5344 }
5345
5346 /* Quick hack of a popup menu
5347  */
5348 static void
5349 activate_cb (GtkWidget   *menuitem,
5350              GtkTextView *text_view)
5351 {
5352   const gchar *signal = g_object_get_data (G_OBJECT (menuitem), "gtk-signal");
5353   gtk_signal_emit_by_name (GTK_OBJECT (text_view), signal);
5354 }
5355
5356 static void
5357 append_action_signal (GtkTextView  *text_view,
5358                       GtkWidget    *menu,
5359                       const gchar  *stock_id,
5360                       const gchar  *signal,
5361                       gboolean      sensitive)
5362 {
5363   GtkWidget *menuitem = gtk_image_menu_item_new_from_stock (stock_id, NULL);
5364
5365   g_object_set_data (G_OBJECT (menuitem), "gtk-signal", (char *)signal);
5366   gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
5367                       GTK_SIGNAL_FUNC (activate_cb), text_view);
5368
5369   gtk_widget_set_sensitive (menuitem, sensitive);
5370
5371   gtk_widget_show (menuitem);
5372   gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
5373 }
5374
5375 static void
5376 popup_menu_detach (GtkWidget *attach_widget,
5377                    GtkMenu   *menu)
5378 {
5379   GTK_TEXT_VIEW (attach_widget)->popup_menu = NULL;
5380 }
5381
5382 static void
5383 popup_position_func (GtkMenu   *menu,
5384                      gint      *x,
5385                      gint      *y,
5386                      gboolean  *push_in,
5387                      gpointer   user_data)
5388 {
5389   GtkTextView *text_view;
5390   GtkWidget *widget;
5391   GdkRectangle cursor_rect;
5392   GdkRectangle onscreen_rect;
5393   gint root_x, root_y;
5394   GtkTextIter iter;
5395   GtkRequisition req;
5396
5397   text_view = GTK_TEXT_VIEW (user_data);
5398   widget = GTK_WIDGET (text_view);
5399
5400   g_return_if_fail (GTK_WIDGET_REALIZED (text_view));
5401
5402   gdk_window_get_origin (widget->window, &root_x, &root_y);
5403
5404   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
5405                                     &iter,
5406                                     gtk_text_buffer_get_insert (get_buffer (text_view)));
5407
5408   gtk_text_view_get_iter_location (text_view,
5409                                    &iter,
5410                                    &cursor_rect);
5411
5412   gtk_text_view_get_visible_rect (text_view, &onscreen_rect);
5413
5414   gtk_widget_size_request (text_view->popup_menu, &req);
5415
5416   /* can't use rectangle_intersect since cursor rect can have 0 width */
5417   if (cursor_rect.x >= onscreen_rect.x &&
5418       cursor_rect.x < onscreen_rect.x + onscreen_rect.width &&
5419       cursor_rect.y >= onscreen_rect.y &&
5420       cursor_rect.y < onscreen_rect.y + onscreen_rect.height)
5421     {
5422       gtk_text_view_buffer_to_window_coords (text_view,
5423                                              GTK_TEXT_WINDOW_WIDGET,
5424                                              cursor_rect.x, cursor_rect.y,
5425                                              &cursor_rect.x, &cursor_rect.y);
5426
5427       *x = root_x + cursor_rect.x + cursor_rect.width;
5428       *y = root_y + cursor_rect.y + cursor_rect.height;
5429     }
5430   else
5431     {
5432       /* Just center the menu, since cursor is offscreen. */
5433       *x = root_x + (widget->allocation.width / 2 - req.width / 2);
5434       *y = root_y + (widget->allocation.height / 2 - req.height / 2);
5435     }
5436
5437   /* Ensure sanity */
5438   *x = CLAMP (*x, root_x, (root_x + widget->allocation.width));
5439   *y = CLAMP (*y, root_y, (root_y + widget->allocation.height));
5440
5441   *x = CLAMP (*x, 0, MAX (0, gdk_screen_width () - req.width));
5442   *y = CLAMP (*y, 0, MAX (0, gdk_screen_height () - req.height));
5443 }
5444
5445 typedef struct
5446 {
5447   GtkTextView *text_view;
5448   gint button;
5449   guint time;
5450 } PopupInfo;
5451
5452 static void
5453 popup_targets_received (GtkClipboard     *clipboard,
5454                         GtkSelectionData *data,
5455                         gpointer          user_data)
5456 {
5457   PopupInfo *info = user_data;
5458   GtkTextView *text_view = info->text_view;
5459
5460   if (GTK_WIDGET_REALIZED (text_view))
5461     {
5462       /* We implicitely rely here on the fact that if we are pasting ourself, we'll
5463        * have text targets as well as the private GTK_TEXT_BUFFER_CONTENTS target.
5464        */
5465       gboolean clipboard_contains_text = gtk_selection_data_targets_include_text (data);
5466       GtkWidget *menuitem;
5467       GtkWidget *submenu;
5468       gboolean have_selection;
5469       gboolean can_insert;
5470       GtkTextIter iter;
5471
5472       if (text_view->popup_menu)
5473         gtk_widget_destroy (text_view->popup_menu);
5474
5475       text_view->popup_menu = gtk_menu_new ();
5476
5477       gtk_menu_attach_to_widget (GTK_MENU (text_view->popup_menu),
5478                                  GTK_WIDGET (text_view),
5479                                  popup_menu_detach);
5480
5481       have_selection = gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
5482                                                              NULL, NULL);
5483
5484       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
5485                                         &iter,
5486                                         gtk_text_buffer_get_insert (get_buffer (text_view)));
5487
5488       can_insert = gtk_text_iter_can_insert (&iter, text_view->editable);
5489
5490       append_action_signal (text_view, text_view->popup_menu, GTK_STOCK_CUT, "cut_clipboard",
5491                             have_selection);
5492       append_action_signal (text_view, text_view->popup_menu, GTK_STOCK_COPY, "copy_clipboard",
5493                             have_selection);
5494       append_action_signal (text_view, text_view->popup_menu, GTK_STOCK_PASTE, "paste_clipboard",
5495                             can_insert && clipboard_contains_text);
5496
5497       menuitem = gtk_separator_menu_item_new ();
5498       gtk_widget_show (menuitem);
5499       gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
5500
5501       menuitem = gtk_menu_item_new_with_label (_("Input Methods"));
5502       gtk_widget_show (menuitem);
5503       submenu = gtk_menu_new ();
5504       gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), submenu);
5505       gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
5506
5507       gtk_im_multicontext_append_menuitems (GTK_IM_MULTICONTEXT (text_view->im_context),
5508                                             GTK_MENU_SHELL (submenu));
5509
5510       gtk_signal_emit (GTK_OBJECT (text_view),
5511                        signals[POPULATE_POPUP],
5512                        text_view->popup_menu);
5513
5514       if (info->button)
5515         gtk_menu_popup (GTK_MENU (text_view->popup_menu), NULL, NULL,
5516                         NULL, NULL,
5517                         info->button, info->time);
5518       else
5519         gtk_menu_popup (GTK_MENU (text_view->popup_menu), NULL, NULL,
5520                         popup_position_func, text_view,
5521                         0, gtk_get_current_event_time ());
5522     }
5523
5524   g_object_unref (text_view);
5525   g_free (info);
5526 }
5527
5528 static void
5529 gtk_text_view_do_popup (GtkTextView    *text_view,
5530                         GdkEventButton *event)
5531 {
5532   PopupInfo *info = g_new (PopupInfo, 1);
5533
5534   /* In order to know what entries we should make sensitive, we
5535    * ask for the current targets of the clipboard, and when
5536    * we get them, then we actually pop up the menu.
5537    */
5538   info->text_view = g_object_ref (text_view);
5539
5540   if (event)
5541     {
5542       info->button = event->button;
5543       info->time = event->time;
5544     }
5545   else
5546     {
5547       info->button = 0;
5548       info->time = gtk_get_current_event_time ();
5549     }
5550
5551   gtk_clipboard_request_contents (gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
5552                                   gdk_atom_intern ("TARGETS", FALSE),
5553                                   popup_targets_received,
5554                                   info);
5555 }
5556
5557 static void
5558 gtk_text_view_popup_menu (GtkWidget *widget)
5559 {
5560   gtk_text_view_do_popup (GTK_TEXT_VIEW (widget), NULL);
5561 }
5562
5563 /* Child GdkWindows */
5564
5565
5566 static GtkTextWindow*
5567 text_window_new (GtkTextWindowType  type,
5568                  GtkWidget         *widget,
5569                  gint               width_request,
5570                  gint               height_request)
5571 {
5572   GtkTextWindow *win;
5573
5574   win = g_new (GtkTextWindow, 1);
5575
5576   win->type = type;
5577   win->widget = widget;
5578   win->window = NULL;
5579   win->bin_window = NULL;
5580   win->requisition.width = width_request;
5581   win->requisition.height = height_request;
5582   win->allocation.width = width_request;
5583   win->allocation.height = height_request;
5584   win->allocation.x = 0;
5585   win->allocation.y = 0;
5586
5587   return win;
5588 }
5589
5590 static void
5591 text_window_free (GtkTextWindow *win)
5592 {
5593   if (win->window)
5594     text_window_unrealize (win);
5595
5596   g_free (win);
5597 }
5598
5599 static void
5600 text_window_realize (GtkTextWindow *win,
5601                      GdkWindow     *parent)
5602 {
5603   GdkWindowAttr attributes;
5604   gint attributes_mask;
5605   GdkCursor *cursor;
5606
5607   attributes.window_type = GDK_WINDOW_CHILD;
5608   attributes.x = win->allocation.x;
5609   attributes.y = win->allocation.y;
5610   attributes.width = win->allocation.width;
5611   attributes.height = win->allocation.height;
5612   attributes.wclass = GDK_INPUT_OUTPUT;
5613   attributes.visual = gtk_widget_get_visual (win->widget);
5614   attributes.colormap = gtk_widget_get_colormap (win->widget);
5615   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK;
5616
5617   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
5618
5619   win->window = gdk_window_new (parent,
5620                                 &attributes,
5621                                 attributes_mask);
5622
5623   gdk_window_show (win->window);
5624   gdk_window_set_user_data (win->window, win->widget);
5625
5626   attributes.x = 0;
5627   attributes.y = 0;
5628   attributes.width = win->allocation.width;
5629   attributes.height = win->allocation.height;
5630   attributes.event_mask = (GDK_EXPOSURE_MASK            |
5631                            GDK_SCROLL_MASK              |
5632                            GDK_KEY_PRESS_MASK           |
5633                            GDK_BUTTON_PRESS_MASK        |
5634                            GDK_BUTTON_RELEASE_MASK      |
5635                            GDK_POINTER_MOTION_MASK      |
5636                            GDK_POINTER_MOTION_HINT_MASK |
5637                            gtk_widget_get_events (win->widget));
5638
5639   win->bin_window = gdk_window_new (win->window,
5640                                     &attributes,
5641                                     attributes_mask);
5642
5643   gdk_window_show (win->bin_window);
5644   gdk_window_set_user_data (win->bin_window, win->widget);
5645
5646   if (win->type == GTK_TEXT_WINDOW_TEXT)
5647     {
5648       /* I-beam cursor */
5649       cursor = gdk_cursor_new (GDK_XTERM);
5650       gdk_window_set_cursor (win->bin_window, cursor);
5651       gdk_cursor_destroy (cursor);
5652
5653       gtk_im_context_set_client_window (GTK_TEXT_VIEW (win->widget)->im_context,
5654                                         win->window);
5655
5656
5657       gdk_window_set_background (win->bin_window,
5658                                  &win->widget->style->base[GTK_WIDGET_STATE (win->widget)]);
5659     }
5660   else
5661     {
5662       gdk_window_set_background (win->bin_window,
5663                                  &win->widget->style->bg[GTK_WIDGET_STATE (win->widget)]);
5664     }
5665
5666   g_object_set_qdata (G_OBJECT (win->window),
5667                       g_quark_from_static_string ("gtk-text-view-text-window"),
5668                       win);
5669
5670   g_object_set_qdata (G_OBJECT (win->bin_window),
5671                       g_quark_from_static_string ("gtk-text-view-text-window"),
5672                       win);
5673 }
5674
5675 static void
5676 text_window_unrealize (GtkTextWindow *win)
5677 {
5678   if (win->type == GTK_TEXT_WINDOW_TEXT)
5679     {
5680       gtk_im_context_set_client_window (GTK_TEXT_VIEW (win->widget)->im_context,
5681                                         NULL);
5682     }
5683
5684   gdk_window_set_user_data (win->window, NULL);
5685   gdk_window_set_user_data (win->bin_window, NULL);
5686   gdk_window_destroy (win->bin_window);
5687   gdk_window_destroy (win->window);
5688   win->window = NULL;
5689   win->bin_window = NULL;
5690 }
5691
5692 static void
5693 text_window_size_allocate (GtkTextWindow *win,
5694                            GdkRectangle  *rect)
5695 {
5696   win->allocation = *rect;
5697
5698   if (win->window)
5699     {
5700       gdk_window_move_resize (win->window,
5701                               rect->x, rect->y,
5702                               rect->width, rect->height);
5703
5704       gdk_window_resize (win->bin_window,
5705                          rect->width, rect->height);
5706     }
5707 }
5708
5709 static void
5710 text_window_scroll        (GtkTextWindow *win,
5711                            gint           dx,
5712                            gint           dy)
5713 {
5714   if (dx != 0 || dy != 0)
5715     {
5716       gdk_window_scroll (win->bin_window, dx, dy);
5717     }
5718 }
5719
5720 void
5721 text_window_invalidate_rect (GtkTextWindow *win,
5722                              GdkRectangle  *rect)
5723 {
5724   GdkRectangle window_rect;
5725
5726   gtk_text_view_buffer_to_window_coords (GTK_TEXT_VIEW (win->widget),
5727                                          win->type,
5728                                          rect->x,
5729                                          rect->y,
5730                                          &window_rect.x,
5731                                          &window_rect.y);
5732
5733   window_rect.width = rect->width;
5734   window_rect.height = rect->height;
5735
5736   /* Adjust the rect as appropriate */
5737
5738   switch (win->type)
5739     {
5740     case GTK_TEXT_WINDOW_TEXT:
5741       break;
5742
5743     case GTK_TEXT_WINDOW_LEFT:
5744     case GTK_TEXT_WINDOW_RIGHT:
5745       window_rect.x = 0;
5746       window_rect.width = win->allocation.width;
5747       break;
5748
5749     case GTK_TEXT_WINDOW_TOP:
5750     case GTK_TEXT_WINDOW_BOTTOM:
5751       window_rect.y = 0;
5752       window_rect.height = win->allocation.height;
5753       break;
5754
5755     default:
5756       g_warning ("%s: bug!", G_STRLOC);
5757       return;
5758       break;
5759     }
5760
5761   gdk_window_invalidate_rect (win->bin_window, &window_rect, FALSE);
5762
5763 #if 0
5764   {
5765     GdkColor color = { 0, 65535, 0, 0 };
5766     GdkGC *gc = gdk_gc_new (win->bin_window);
5767     gdk_gc_set_rgb_fg_color (gc, &color);
5768     gdk_draw_rectangle (win->bin_window,
5769                         gc, TRUE, window_rect.x, window_rect.y,
5770                         window_rect.width, window_rect.height);
5771     gdk_gc_unref (gc);
5772   }
5773 #endif
5774 }
5775
5776 static gint
5777 text_window_get_width (GtkTextWindow *win)
5778 {
5779   return win->allocation.width;
5780 }
5781
5782 static gint
5783 text_window_get_height (GtkTextWindow *win)
5784 {
5785   return win->allocation.height;
5786 }
5787
5788 static void
5789 text_window_get_allocation (GtkTextWindow *win,
5790                             GdkRectangle  *rect)
5791 {
5792   *rect = win->allocation;
5793 }
5794
5795 /* Windows */
5796
5797
5798 /**
5799  * gtk_text_view_get_window:
5800  * @text_view: a #GtkTextView
5801  * @win: window to get
5802  *
5803  * Retrieves the #GdkWindow corresponding to an area of the text view;
5804  * possible windows include the overall widget window, child windows
5805  * on the left, right, top, bottom, and the window that displays the
5806  * text buffer. Windows are %NULL and nonexistent if their width or
5807  * height is 0, and are nonexistent before the widget has been
5808  * realized.
5809  *
5810  * Return value: a #GdkWindow, or %NULL
5811  **/
5812 GdkWindow*
5813 gtk_text_view_get_window (GtkTextView *text_view,
5814                           GtkTextWindowType win)
5815 {
5816   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
5817
5818   switch (win)
5819     {
5820     case GTK_TEXT_WINDOW_WIDGET:
5821       return GTK_WIDGET (text_view)->window;
5822       break;
5823
5824     case GTK_TEXT_WINDOW_TEXT:
5825       return text_view->text_window->bin_window;
5826       break;
5827
5828     case GTK_TEXT_WINDOW_LEFT:
5829       if (text_view->left_window)
5830         return text_view->left_window->bin_window;
5831       else
5832         return NULL;
5833       break;
5834
5835     case GTK_TEXT_WINDOW_RIGHT:
5836       if (text_view->right_window)
5837         return text_view->right_window->bin_window;
5838       else
5839         return NULL;
5840       break;
5841
5842     case GTK_TEXT_WINDOW_TOP:
5843       if (text_view->top_window)
5844         return text_view->top_window->bin_window;
5845       else
5846         return NULL;
5847       break;
5848
5849     case GTK_TEXT_WINDOW_BOTTOM:
5850       if (text_view->bottom_window)
5851         return text_view->bottom_window->bin_window;
5852       else
5853         return NULL;
5854       break;
5855
5856     default:
5857       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
5858       return NULL;
5859       break;
5860     }
5861 }
5862
5863 /**
5864  * gtk_text_view_get_window_type:
5865  * @text_view: a #GtkTextView
5866  * @window: a window type
5867  *
5868  * Usually used to find out which window an event corresponds to.
5869  * If you connect to an event signal on @text_view, this function
5870  * should be called on <literal>event-&gt;window</literal> to
5871  * see which window it was.
5872  *
5873  * Return value: the window type.
5874  **/
5875 GtkTextWindowType
5876 gtk_text_view_get_window_type (GtkTextView *text_view,
5877                                GdkWindow   *window)
5878 {
5879   GtkTextWindow *win;
5880
5881   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
5882   g_return_val_if_fail (GDK_IS_WINDOW (window), 0);
5883
5884   if (window == GTK_WIDGET (text_view)->window)
5885     return GTK_TEXT_WINDOW_WIDGET;
5886
5887   win = g_object_get_qdata (G_OBJECT (window),
5888                             g_quark_try_string ("gtk-text-view-text-window"));
5889
5890   if (win)
5891     return win->type;
5892   else
5893     {
5894       return GTK_TEXT_WINDOW_PRIVATE;
5895     }
5896 }
5897
5898 static void
5899 buffer_to_widget (GtkTextView      *text_view,
5900                   gint              buffer_x,
5901                   gint              buffer_y,
5902                   gint             *window_x,
5903                   gint             *window_y)
5904 {
5905   gint focus_edge_width;
5906   gboolean interior_focus;
5907
5908   gtk_widget_style_get (GTK_WIDGET (text_view), "interior_focus", &interior_focus, NULL);
5909
5910   if (interior_focus)
5911     focus_edge_width = 0;
5912   else
5913     focus_edge_width = 1;
5914
5915   if (window_x)
5916     {
5917       *window_x = buffer_x - text_view->xoffset + focus_edge_width;
5918       if (text_view->left_window)
5919         *window_x += text_view->left_window->allocation.width;
5920     }
5921
5922   if (window_y)
5923     {
5924       *window_y = buffer_y - text_view->yoffset + focus_edge_width;
5925       if (text_view->top_window)
5926         *window_y += text_view->top_window->allocation.height;
5927     }
5928 }
5929
5930 static void
5931 widget_to_text_window (GtkTextWindow *win,
5932                        gint           widget_x,
5933                        gint           widget_y,
5934                        gint          *window_x,
5935                        gint          *window_y)
5936 {
5937   if (window_x)
5938     *window_x = widget_x - win->allocation.x;
5939
5940   if (window_y)
5941     *window_y = widget_y - win->allocation.y;
5942 }
5943
5944 static void
5945 buffer_to_text_window (GtkTextView   *text_view,
5946                        GtkTextWindow *win,
5947                        gint           buffer_x,
5948                        gint           buffer_y,
5949                        gint          *window_x,
5950                        gint          *window_y)
5951 {
5952   if (win == NULL)
5953     {
5954       g_warning ("Attempt to convert text buffer coordinates to coordinates "
5955                  "for a nonexistent or private child window of GtkTextView");
5956       return;
5957     }
5958
5959   buffer_to_widget (text_view,
5960                     buffer_x, buffer_y,
5961                     window_x, window_y);
5962
5963   widget_to_text_window (win,
5964                          window_x ? *window_x : 0,
5965                          window_y ? *window_y : 0,
5966                          window_x,
5967                          window_y);
5968 }
5969
5970 /**
5971  * gtk_text_view_buffer_to_window_coords:
5972  * @text_view: a #GtkTextView
5973  * @win: a #GtkTextWindowType
5974  * @buffer_x: buffer x coordinate
5975  * @buffer_y: buffer y coordinate
5976  * @window_x: window x coordinate return location
5977  * @window_y: window y coordinate return location
5978  *
5979  * Converts coordinate (@buffer_x, @buffer_y) to coordinates for the window
5980  * @win, and stores the result in (@window_x, @window_y).
5981  **/
5982 void
5983 gtk_text_view_buffer_to_window_coords (GtkTextView      *text_view,
5984                                        GtkTextWindowType win,
5985                                        gint              buffer_x,
5986                                        gint              buffer_y,
5987                                        gint             *window_x,
5988                                        gint             *window_y)
5989 {
5990   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
5991
5992   switch (win)
5993     {
5994     case GTK_TEXT_WINDOW_WIDGET:
5995       buffer_to_widget (text_view,
5996                         buffer_x, buffer_y,
5997                         window_x, window_y);
5998       break;
5999
6000     case GTK_TEXT_WINDOW_TEXT:
6001       if (window_x)
6002         *window_x = buffer_x - text_view->xoffset;
6003       if (window_y)
6004         *window_y = buffer_y - text_view->yoffset;
6005       break;
6006
6007     case GTK_TEXT_WINDOW_LEFT:
6008       buffer_to_text_window (text_view,
6009                              text_view->left_window,
6010                              buffer_x, buffer_y,
6011                              window_x, window_y);
6012       break;
6013
6014     case GTK_TEXT_WINDOW_RIGHT:
6015       buffer_to_text_window (text_view,
6016                              text_view->right_window,
6017                              buffer_x, buffer_y,
6018                              window_x, window_y);
6019       break;
6020
6021     case GTK_TEXT_WINDOW_TOP:
6022       buffer_to_text_window (text_view,
6023                              text_view->top_window,
6024                              buffer_x, buffer_y,
6025                              window_x, window_y);
6026       break;
6027
6028     case GTK_TEXT_WINDOW_BOTTOM:
6029       buffer_to_text_window (text_view,
6030                              text_view->bottom_window,
6031                              buffer_x, buffer_y,
6032                              window_x, window_y);
6033       break;
6034
6035     case GTK_TEXT_WINDOW_PRIVATE:
6036       g_warning ("%s: can't get coords for private windows", G_STRLOC);
6037       break;
6038
6039     default:
6040       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
6041       break;
6042     }
6043 }
6044
6045 static void
6046 widget_to_buffer (GtkTextView *text_view,
6047                   gint         widget_x,
6048                   gint         widget_y,
6049                   gint        *buffer_x,
6050                   gint        *buffer_y)
6051 {
6052   gint focus_edge_width;
6053   gboolean interior_focus;
6054
6055   gtk_widget_style_get (GTK_WIDGET (text_view), "interior_focus", &interior_focus, NULL);
6056
6057   if (interior_focus)
6058     focus_edge_width = 0;
6059   else
6060     focus_edge_width = 1;
6061
6062   if (buffer_x)
6063     {
6064       *buffer_x = widget_x - focus_edge_width + text_view->xoffset;
6065       if (text_view->left_window)
6066         *buffer_x -= text_view->left_window->allocation.width;
6067     }
6068
6069   if (buffer_y)
6070     {
6071       *buffer_y = widget_y - focus_edge_width + text_view->yoffset;
6072       if (text_view->top_window)
6073         *buffer_y -= text_view->top_window->allocation.height;
6074     }
6075 }
6076
6077 static void
6078 text_window_to_widget (GtkTextWindow *win,
6079                        gint           window_x,
6080                        gint           window_y,
6081                        gint          *widget_x,
6082                        gint          *widget_y)
6083 {
6084   if (widget_x)
6085     *widget_x = window_x + win->allocation.x;
6086
6087   if (widget_y)
6088     *widget_y = window_y + win->allocation.y;
6089 }
6090
6091 static void
6092 text_window_to_buffer (GtkTextView   *text_view,
6093                        GtkTextWindow *win,
6094                        gint           window_x,
6095                        gint           window_y,
6096                        gint          *buffer_x,
6097                        gint          *buffer_y)
6098 {
6099   if (win == NULL)
6100     {
6101       g_warning ("Attempt to convert GtkTextView buffer coordinates into "
6102                  "coordinates for a nonexistent child window.");
6103       return;
6104     }
6105
6106   text_window_to_widget (win,
6107                          window_x,
6108                          window_y,
6109                          buffer_x,
6110                          buffer_y);
6111
6112   widget_to_buffer (text_view,
6113                     buffer_x ? *buffer_x : 0,
6114                     buffer_y ? *buffer_y : 0,
6115                     buffer_x,
6116                     buffer_y);
6117 }
6118
6119 /**
6120  * gtk_text_view_window_to_buffer_coords:
6121  * @text_view: a #GtkTextView
6122  * @win: a #GtkTextWindowType
6123  * @window_x: window x coordinate
6124  * @window_y: window y coordinate
6125  * @buffer_x: buffer x coordinate return location
6126  * @buffer_y: buffer y coordinate return location
6127  *
6128  * Converts coordinates on the window identified by @win to buffer
6129  * coordinates, storing the result in (@buffer_x,@buffer_y).
6130  **/
6131 void
6132 gtk_text_view_window_to_buffer_coords (GtkTextView      *text_view,
6133                                        GtkTextWindowType win,
6134                                        gint              window_x,
6135                                        gint              window_y,
6136                                        gint             *buffer_x,
6137                                        gint             *buffer_y)
6138 {
6139   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6140
6141   switch (win)
6142     {
6143     case GTK_TEXT_WINDOW_WIDGET:
6144       widget_to_buffer (text_view,
6145                         window_x, window_y,
6146                         buffer_x, buffer_y);
6147       break;
6148
6149     case GTK_TEXT_WINDOW_TEXT:
6150       if (buffer_x)
6151         *buffer_x = window_x + text_view->xoffset;
6152       if (buffer_y)
6153         *buffer_y = window_y + text_view->yoffset;
6154       break;
6155
6156     case GTK_TEXT_WINDOW_LEFT:
6157       text_window_to_buffer (text_view,
6158                              text_view->left_window,
6159                              window_x, window_y,
6160                              buffer_x, buffer_y);
6161       break;
6162
6163     case GTK_TEXT_WINDOW_RIGHT:
6164       text_window_to_buffer (text_view,
6165                              text_view->right_window,
6166                              window_x, window_y,
6167                              buffer_x, buffer_y);
6168       break;
6169
6170     case GTK_TEXT_WINDOW_TOP:
6171       text_window_to_buffer (text_view,
6172                              text_view->top_window,
6173                              window_x, window_y,
6174                              buffer_x, buffer_y);
6175       break;
6176
6177     case GTK_TEXT_WINDOW_BOTTOM:
6178       text_window_to_buffer (text_view,
6179                              text_view->bottom_window,
6180                              window_x, window_y,
6181                              buffer_x, buffer_y);
6182       break;
6183
6184     case GTK_TEXT_WINDOW_PRIVATE:
6185       g_warning ("%s: can't get coords for private windows", G_STRLOC);
6186       break;
6187
6188     default:
6189       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
6190       break;
6191     }
6192 }
6193
6194 static void
6195 set_window_width (GtkTextView      *text_view,
6196                   gint              width,
6197                   GtkTextWindowType type,
6198                   GtkTextWindow   **winp)
6199 {
6200   if (width == 0)
6201     {
6202       if (*winp)
6203         {
6204           text_window_free (*winp);
6205           *winp = NULL;
6206           gtk_widget_queue_resize (GTK_WIDGET (text_view));
6207         }
6208     }
6209   else
6210     {
6211       if (*winp == NULL)
6212         {
6213           *winp = text_window_new (type,
6214                                    GTK_WIDGET (text_view),
6215                                    width, 0);
6216           /* if the widget is already realized we need to realize the child manually */
6217           if (GTK_WIDGET_REALIZED (text_view))
6218             text_window_realize (*winp, GTK_WIDGET (text_view)->window);
6219         }
6220       else
6221         {
6222           if ((*winp)->requisition.width == width)
6223             return;
6224         }
6225
6226       gtk_widget_queue_resize (GTK_WIDGET (text_view));
6227     }
6228 }
6229
6230
6231 static void
6232 set_window_height (GtkTextView      *text_view,
6233                    gint              height,
6234                    GtkTextWindowType type,
6235                    GtkTextWindow   **winp)
6236 {
6237   if (height == 0)
6238     {
6239       if (*winp)
6240         {
6241           text_window_free (*winp);
6242           *winp = NULL;
6243           gtk_widget_queue_resize (GTK_WIDGET (text_view));
6244         }
6245     }
6246   else
6247     {
6248       if (*winp == NULL)
6249         {
6250           *winp = text_window_new (type,
6251                                    GTK_WIDGET (text_view),
6252                                    0, height);
6253
6254           /* if the widget is already realized we need to realize the child manually */
6255           if (GTK_WIDGET_REALIZED (text_view))
6256             text_window_realize (*winp, GTK_WIDGET (text_view)->window);
6257         }
6258       else
6259         {
6260           if ((*winp)->requisition.height == height)
6261             return;
6262         }
6263
6264       gtk_widget_queue_resize (GTK_WIDGET (text_view));
6265     }
6266 }
6267
6268 /**
6269  * gtk_text_view_set_border_window_size:
6270  * @text_view: a #GtkTextView
6271  * @type: window to affect
6272  * @size: width or height of the window
6273  *
6274  * Sets the width of %GTK_TEXT_WINDOW_LEFT or %GTK_TEXT_WINDOW_RIGHT,
6275  * or the height of %GTK_TEXT_WINDOW_TOP or %GTK_TEXT_WINDOW_BOTTOM.
6276  * Automatically destroys the corresponding window if the size is set
6277  * to 0, and creates the window if the size is set to non-zero.  This
6278  * function can only be used for the "border windows," it doesn't work
6279  * with #GTK_TEXT_WINDOW_WIDGET, #GTK_TEXT_WINDOW_TEXT, or
6280  * #GTK_TEXT_WINDOW_PRIVATE.
6281  **/
6282 void
6283 gtk_text_view_set_border_window_size (GtkTextView      *text_view,
6284                                       GtkTextWindowType type,
6285                                       gint              size)
6286
6287 {
6288   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6289   g_return_if_fail (size >= 0);
6290
6291   switch (type)
6292     {
6293     case GTK_TEXT_WINDOW_LEFT:
6294       set_window_width (text_view, size, GTK_TEXT_WINDOW_LEFT,
6295                         &text_view->left_window);
6296       break;
6297
6298     case GTK_TEXT_WINDOW_RIGHT:
6299       set_window_width (text_view, size, GTK_TEXT_WINDOW_RIGHT,
6300                         &text_view->right_window);
6301       break;
6302
6303     case GTK_TEXT_WINDOW_TOP:
6304       set_window_height (text_view, size, GTK_TEXT_WINDOW_TOP,
6305                          &text_view->top_window);
6306       break;
6307
6308     case GTK_TEXT_WINDOW_BOTTOM:
6309       set_window_height (text_view, size, GTK_TEXT_WINDOW_BOTTOM,
6310                          &text_view->bottom_window);
6311       break;
6312
6313     default:
6314       g_warning ("Can only set size of left/right/top/bottom border windows with gtk_text_view_set_border_window_size()");
6315       break;
6316     }
6317 }
6318
6319 /**
6320  * gtk_text_view_get_border_window_size:
6321  * @text_view: a #GtkTextView
6322  * @type: window to return size from
6323  *
6324  * Gets the width of the specified border window. See
6325  * gtk_text_view_set_border_window_size().
6326  *
6327  * Return value: width of window
6328  **/
6329 gint
6330 gtk_text_view_get_border_window_size (GtkTextView       *text_view,
6331                                       GtkTextWindowType  type)
6332 {
6333   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
6334
6335   switch (type)
6336     {
6337     case GTK_TEXT_WINDOW_LEFT:
6338       if (text_view->left_window)
6339         return text_view->left_window->requisition.width;
6340
6341     case GTK_TEXT_WINDOW_RIGHT:
6342       if (text_view->right_window)
6343         return text_view->right_window->requisition.width;
6344
6345     case GTK_TEXT_WINDOW_TOP:
6346       if (text_view->top_window)
6347         return text_view->top_window->requisition.height;
6348
6349     case GTK_TEXT_WINDOW_BOTTOM:
6350       if (text_view->bottom_window)
6351         return text_view->bottom_window->requisition.height;
6352
6353     default:
6354       g_warning ("Can only get size of left/right/top/bottom border windows with gtk_text_view_get_border_window_size()");
6355       break;
6356     }
6357
6358   return 0;
6359 }
6360
6361 /*
6362  * Child widgets
6363  */
6364
6365 static GtkTextViewChild*
6366 text_view_child_new_anchored (GtkWidget          *child,
6367                               GtkTextChildAnchor *anchor,
6368                               GtkTextLayout      *layout)
6369 {
6370   GtkTextViewChild *vc;
6371
6372   vc = g_new (GtkTextViewChild, 1);
6373
6374   vc->widget = child;
6375   vc->anchor = anchor;
6376
6377   vc->from_top_of_line = 0;
6378   vc->from_left_of_buffer = 0;
6379
6380   g_object_ref (G_OBJECT (vc->widget));
6381   g_object_ref (G_OBJECT (vc->anchor));
6382
6383   g_object_set_data (G_OBJECT (child),
6384                      "gtk-text-view-child",
6385                      vc);
6386
6387   gtk_text_child_anchor_register_child (anchor, child, layout);
6388
6389   return vc;
6390 }
6391
6392 static GtkTextViewChild*
6393 text_view_child_new_window (GtkWidget          *child,
6394                             GtkTextWindowType   type,
6395                             gint                x,
6396                             gint                y)
6397 {
6398   GtkTextViewChild *vc;
6399
6400   vc = g_new (GtkTextViewChild, 1);
6401
6402   vc->widget = child;
6403   vc->anchor = NULL;
6404
6405   vc->from_top_of_line = 0;
6406   vc->from_left_of_buffer = 0;
6407
6408   g_object_ref (G_OBJECT (vc->widget));
6409
6410   vc->type = type;
6411   vc->x = x;
6412   vc->y = y;
6413
6414   return vc;
6415 }
6416
6417 static void
6418 text_view_child_free (GtkTextViewChild *child)
6419 {
6420   g_object_set_data (G_OBJECT (child->widget),
6421                      "gtk-text-view-child", NULL);
6422
6423   if (child->anchor)
6424     {
6425       gtk_text_child_anchor_unregister_child (child->anchor,
6426                                               child->widget);
6427       g_object_unref (G_OBJECT (child->anchor));
6428     }
6429
6430   g_object_unref (G_OBJECT (child->widget));
6431
6432   g_free (child);
6433 }
6434
6435 static void
6436 text_view_child_set_parent_window (GtkTextView      *text_view,
6437                                    GtkTextViewChild *vc)
6438 {
6439   if (vc->anchor)
6440     gtk_widget_set_parent_window (vc->widget,
6441                                   text_view->text_window->bin_window);
6442   else
6443     {
6444       GdkWindow *window;
6445       window = gtk_text_view_get_window (text_view,
6446                                          vc->type);
6447       gtk_widget_set_parent_window (vc->widget, window);
6448     }
6449 }
6450
6451 static void
6452 add_child (GtkTextView      *text_view,
6453            GtkTextViewChild *vc)
6454 {
6455   text_view->children = g_slist_prepend (text_view->children,
6456                                          vc);
6457
6458   if (GTK_WIDGET_REALIZED (text_view))
6459     text_view_child_set_parent_window (text_view, vc);
6460
6461   gtk_widget_set_parent (vc->widget, GTK_WIDGET (text_view));
6462 }
6463
6464 void
6465 gtk_text_view_add_child_at_anchor (GtkTextView          *text_view,
6466                                    GtkWidget            *child,
6467                                    GtkTextChildAnchor   *anchor)
6468 {
6469   GtkTextViewChild *vc;
6470
6471   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6472   g_return_if_fail (GTK_IS_WIDGET (child));
6473   g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
6474   g_return_if_fail (child->parent == NULL);
6475
6476   gtk_text_view_ensure_layout (text_view);
6477
6478   vc = text_view_child_new_anchored (child, anchor,
6479                                      text_view->layout);
6480
6481   add_child (text_view, vc);
6482 }
6483
6484 void
6485 gtk_text_view_add_child_in_window (GtkTextView          *text_view,
6486                                    GtkWidget            *child,
6487                                    GtkTextWindowType     which_window,
6488                                    gint                  xpos,
6489                                    gint                  ypos)
6490 {
6491   GtkTextViewChild *vc;
6492
6493   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6494   g_return_if_fail (GTK_IS_WIDGET (child));
6495   g_return_if_fail (xpos >= 0);
6496   g_return_if_fail (ypos >= 0);
6497   g_return_if_fail (child->parent == NULL);
6498
6499   vc = text_view_child_new_window (child, which_window,
6500                                    xpos, ypos);
6501
6502   add_child (text_view, vc);
6503 }
6504
6505 void
6506 gtk_text_view_move_child          (GtkTextView          *text_view,
6507                                    GtkWidget            *child,
6508                                    gint                  xpos,
6509                                    gint                  ypos)
6510 {
6511   GtkTextViewChild *vc;
6512
6513   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6514   g_return_if_fail (GTK_IS_WIDGET (child));
6515   g_return_if_fail (xpos >= 0);
6516   g_return_if_fail (ypos >= 0);
6517   g_return_if_fail (child->parent == (GtkWidget*) text_view);
6518
6519   vc = g_object_get_data (G_OBJECT (child),
6520                           "gtk-text-view-child");
6521
6522   g_assert (vc != NULL);
6523
6524   vc->x = xpos;
6525   vc->y = ypos;
6526
6527   if (GTK_WIDGET_VISIBLE (child) && GTK_WIDGET_VISIBLE (text_view))
6528     gtk_widget_queue_resize (child);
6529 }
6530
6531
6532
6533 /* Iterator operations */
6534
6535 gboolean
6536 gtk_text_view_forward_display_line (GtkTextView *text_view,
6537                                     GtkTextIter *iter)
6538 {
6539   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6540   g_return_val_if_fail (iter != NULL, FALSE);
6541
6542   gtk_text_view_ensure_layout (text_view);
6543
6544   return gtk_text_layout_move_iter_to_next_line (text_view->layout, iter);
6545 }
6546
6547 gboolean
6548 gtk_text_view_backward_display_line (GtkTextView *text_view,
6549                                      GtkTextIter *iter)
6550 {
6551   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6552   g_return_val_if_fail (iter != NULL, FALSE);
6553
6554   gtk_text_view_ensure_layout (text_view);
6555
6556   return gtk_text_layout_move_iter_to_previous_line (text_view->layout, iter);
6557 }
6558
6559 gboolean
6560 gtk_text_view_forward_display_line_end (GtkTextView *text_view,
6561                                         GtkTextIter *iter)
6562 {
6563   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6564   g_return_val_if_fail (iter != NULL, FALSE);
6565
6566   gtk_text_view_ensure_layout (text_view);
6567
6568   return gtk_text_layout_move_iter_to_line_end (text_view->layout, iter, 1);
6569 }
6570
6571 gboolean
6572 gtk_text_view_backward_display_line_start (GtkTextView *text_view,
6573                                            GtkTextIter *iter)
6574 {
6575   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6576   g_return_val_if_fail (iter != NULL, FALSE);
6577
6578   gtk_text_view_ensure_layout (text_view);
6579
6580   return gtk_text_layout_move_iter_to_line_end (text_view->layout, iter, -1);
6581 }
6582
6583 gboolean
6584 gtk_text_view_starts_display_line (GtkTextView       *text_view,
6585                                    const GtkTextIter *iter)
6586 {
6587   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6588   g_return_val_if_fail (iter != NULL, FALSE);
6589
6590   gtk_text_view_ensure_layout (text_view);
6591
6592   return gtk_text_layout_iter_starts_line (text_view->layout, iter);
6593 }
6594
6595 gboolean
6596 gtk_text_view_move_visually (GtkTextView *text_view,
6597                              GtkTextIter *iter,
6598                              gint         count)
6599 {
6600   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6601   g_return_val_if_fail (iter != NULL, FALSE);
6602
6603   gtk_text_view_ensure_layout (text_view);
6604
6605   return gtk_text_layout_move_iter_visually (text_view->layout, iter, count);
6606 }