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 "gtkintl.h"
  33 #include "gtkmain.h"
  34 #include "gtkmenu.h"
  35 #include "gtkmenuitem.h"
  36 #include "gtkseparatormenuitem.h"
  37 #include "gtksettings.h"
  38 #include "gtksignal.h"
  39 #include "gtktextdisplay.h"
  40 #include "gtktextview.h"
  41 #include "gtkimmulticontext.h"
  42 #include "gdk/gdkkeysyms.h"
  43 #include <string.h>
  44
  45 /* How scrolling, validation, exposes, etc. work.
  46  *
  47  * The expose_event handler has the invariant that the onscreen lines
  48  * have been validated.
  49  *
  50  * There are two ways that onscreen lines can become invalid. The first
  51  * is to change which lines are onscreen. This happens when the value
  52  * of a scroll adjustment changes. So the code path begins in
  53  * gtk_text_view_value_changed() and goes like this:
  54  *   - gdk_window_scroll() to reflect the new adjustment value
  55  *   - validate the lines that were moved onscreen
  56  *   - gdk_window_process_updates() to handle the exposes immediately
  57  *
  58  * The second way is that you get the "invalidated" signal from the layout,
  59  * indicating that lines have become invalid. This code path begins in
  60  * invalidated_handler() and goes like this:
  61  *   - install high-priority idle which does the rest of the steps
  62  *   - if a scroll is pending from scroll_to_mark(), do the scroll,
  63  *     jumping to the gtk_text_view_value_changed() code path
  64  *   - otherwise, validate the onscreen lines
  65  *   - DO NOT process updates
  66  *
  67  * In both cases, validating the onscreen lines can trigger a scroll
  68  * due to maintaining the first_para on the top of the screen.
  69  * If validation triggers a scroll, we jump to the top of the code path
  70  * for value_changed, and bail out of the current code path.
  71  *
  72  * Also, in size_allocate, if we invalidate some lines from changing
  73  * the layout width, we need to go ahead and run the high-priority idle,
  74  * because GTK sends exposes right after doing the size allocates without
  75  * returning to the main loop. This is also why the high-priority idle
  76  * is at a higher priority than resizing.
  77  *
  78  */
  79
  80 #define SCREEN_WIDTH(widget) text_window_get_width (GTK_TEXT_VIEW (widget)->text_window)
  81 #define SCREEN_HEIGHT(widget) text_window_get_height (GTK_TEXT_VIEW (widget)->text_window)
  82
  83 #if 0
  84 #define DEBUG_VALIDATION_AND_SCROLLING
  85 #endif
  86
  87 #ifdef DEBUG_VALIDATION_AND_SCROLLING
  88 #define DV(x) (x)
  89 #else
  90 #define DV(x)
  91 #endif
  92
  93 struct _GtkTextPendingScroll
  94 {
  95   GtkTextMark   *mark;
  96   gdouble        within_margin;
  97   gboolean       use_align;
  98   gdouble        xalign;
  99   gdouble        yalign;
 100 };
 101
 102 enum
 103 {
 104   SET_SCROLL_ADJUSTMENTS,
 105   POPULATE_POPUP,
 106   MOVE_CURSOR,
 107   SET_ANCHOR,
 108   INSERT_AT_CURSOR,
 109   DELETE_FROM_CURSOR,
 110   CUT_CLIPBOARD,
 111   COPY_CLIPBOARD,
 112   PASTE_CLIPBOARD,
 113   TOGGLE_OVERWRITE,
 114   LAST_SIGNAL
 115 };
 116
 117 enum
 118 {
 119   PROP_0,
 120   PROP_PIXELS_ABOVE_LINES,
 121   PROP_PIXELS_BELOW_LINES,
 122   PROP_PIXELS_INSIDE_WRAP,
 123   PROP_EDITABLE,
 124   PROP_WRAP_MODE,
 125   PROP_JUSTIFICATION,
 126   PROP_LEFT_MARGIN,
 127   PROP_RIGHT_MARGIN,
 128   PROP_INDENT,
 129   PROP_TABS,
 130   PROP_CURSOR_VISIBLE,
 131   LAST_PROP
 132 };
 133
 134 static void gtk_text_view_init                 (GtkTextView      *text_view);
 135 static void gtk_text_view_class_init           (GtkTextViewClass *klass);
 136 static void gtk_text_view_destroy              (GtkObject        *object);
 137 static void gtk_text_view_finalize             (GObject          *object);
 138 static void gtk_text_view_set_property         (GObject         *object,
 139                                                 guint            prop_id,
 140                                                 const GValue    *value,
 141                                                 GParamSpec      *pspec);
 142 static void gtk_text_view_get_property         (GObject         *object,
 143                                                 guint            prop_id,
 144                                                 GValue          *value,
 145                                                 GParamSpec      *pspec);
 146 static void gtk_text_view_size_request         (GtkWidget        *widget,
 147                                                 GtkRequisition   *requisition);
 148 static void gtk_text_view_size_allocate        (GtkWidget        *widget,
 149                                                 GtkAllocation    *allocation);
 150 static void gtk_text_view_realize              (GtkWidget        *widget);
 151 static void gtk_text_view_unrealize            (GtkWidget        *widget);
 152 static void gtk_text_view_style_set            (GtkWidget        *widget,
 153                                                 GtkStyle         *previous_style);
 154 static void gtk_text_view_direction_changed    (GtkWidget        *widget,
 155                                                 GtkTextDirection  previous_direction);
 156 static gint gtk_text_view_event                (GtkWidget        *widget,
 157                                                 GdkEvent         *event);
 158 static gint gtk_text_view_key_press_event      (GtkWidget        *widget,
 159                                                 GdkEventKey      *event);
 160 static gint gtk_text_view_key_release_event    (GtkWidget        *widget,
 161                                                 GdkEventKey      *event);
 162 static gint gtk_text_view_button_press_event   (GtkWidget        *widget,
 163                                                 GdkEventButton   *event);
 164 static gint gtk_text_view_button_release_event (GtkWidget        *widget,
 165                                                 GdkEventButton   *event);
 166 static gint gtk_text_view_focus_in_event       (GtkWidget        *widget,
 167                                                 GdkEventFocus    *event);
 168 static gint gtk_text_view_focus_out_event      (GtkWidget        *widget,
 169                                                 GdkEventFocus    *event);
 170 static gint gtk_text_view_motion_event         (GtkWidget        *widget,
 171                                                 GdkEventMotion   *event);
 172 static gint gtk_text_view_expose_event         (GtkWidget        *widget,
 173                                                 GdkEventExpose   *expose);
 174 static void gtk_text_view_draw_focus           (GtkWidget        *widget);
 175 static void gtk_text_view_grab_focus           (GtkWidget        *widget);
 176
 177 /* Source side drag signals */
 178 static void gtk_text_view_drag_begin       (GtkWidget        *widget,
 179                                             GdkDragContext   *context);
 180 static void gtk_text_view_drag_end         (GtkWidget        *widget,
 181                                             GdkDragContext   *context);
 182 static void gtk_text_view_drag_data_get    (GtkWidget        *widget,
 183                                             GdkDragContext   *context,
 184                                             GtkSelectionData *selection_data,
 185                                             guint             info,
 186                                             guint             time);
 187 static void gtk_text_view_drag_data_delete (GtkWidget        *widget,
 188                                             GdkDragContext   *context);
 189
 190 /* Target side drag signals */
 191 static void     gtk_text_view_drag_leave         (GtkWidget        *widget,
 192                                                   GdkDragContext   *context,
 193                                                   guint             time);
 194 static gboolean gtk_text_view_drag_motion        (GtkWidget        *widget,
 195                                                   GdkDragContext   *context,
 196                                                   gint              x,
 197                                                   gint              y,
 198                                                   guint             time);
 199 static gboolean gtk_text_view_drag_drop          (GtkWidget        *widget,
 200                                                   GdkDragContext   *context,
 201                                                   gint              x,
 202                                                   gint              y,
 203                                                   guint             time);
 204 static void     gtk_text_view_drag_data_received (GtkWidget        *widget,
 205                                                   GdkDragContext   *context,
 206                                                   gint              x,
 207                                                   gint              y,
 208                                                   GtkSelectionData *selection_data,
 209                                                   guint             info,
 210                                                   guint             time);
 211
 212 static void gtk_text_view_set_scroll_adjustments (GtkTextView   *text_view,
 213                                                   GtkAdjustment *hadj,
 214                                                   GtkAdjustment *vadj);
 215 static void gtk_text_view_popup_menu             (GtkWidget     *widget);
 216
 217 static void gtk_text_view_move_cursor      (GtkTextView           *text_view,
 218                                             GtkMovementStep        step,
 219                                             gint                   count,
 220                                             gboolean               extend_selection);
 221 static void gtk_text_view_set_anchor       (GtkTextView           *text_view);
 222 static void gtk_text_view_scroll_pages     (GtkTextView           *text_view,
 223                                             gint                   count);
 224 static void gtk_text_view_insert_at_cursor (GtkTextView           *text_view,
 225                                             const gchar           *str);
 226 static void gtk_text_view_delete_from_cursor (GtkTextView           *text_view,
 227                                               GtkDeleteType          type,
 228                                               gint                   count);
 229 static void gtk_text_view_cut_clipboard    (GtkTextView           *text_view);
 230 static void gtk_text_view_copy_clipboard   (GtkTextView           *text_view);
 231 static void gtk_text_view_paste_clipboard  (GtkTextView           *text_view);
 232 static void gtk_text_view_toggle_overwrite (GtkTextView           *text_view);
 233 static void gtk_text_view_unselect         (GtkTextView           *text_view);
 234
 235 static void     gtk_text_view_validate_onscreen     (GtkTextView        *text_view);
 236 static void     gtk_text_view_get_first_para_iter   (GtkTextView        *text_view,
 237                                                      GtkTextIter        *iter);
 238 static void     gtk_text_view_update_layout_width       (GtkTextView        *text_view);
 239 static void     gtk_text_view_set_attributes_from_style (GtkTextView        *text_view,
 240                                                          GtkTextAttributes *values,
 241                                                          GtkStyle           *style);
 242 static void     gtk_text_view_ensure_layout          (GtkTextView        *text_view);
 243 static void     gtk_text_view_destroy_layout         (GtkTextView        *text_view);
 244 static void     gtk_text_view_check_keymap_direction (GtkTextView        *text_view);
 245 static void     gtk_text_view_reset_im_context       (GtkTextView        *text_view);
 246 static void     gtk_text_view_start_selection_drag   (GtkTextView        *text_view,
 247                                                       const GtkTextIter  *iter,
 248                                                       GdkEventButton     *event);
 249 static gboolean gtk_text_view_end_selection_drag     (GtkTextView        *text_view,
 250                                                       GdkEventButton     *event);
 251 static void     gtk_text_view_start_selection_dnd    (GtkTextView        *text_view,
 252                                                       const GtkTextIter  *iter,
 253                                                       GdkEventMotion     *event);
 254 static void     gtk_text_view_check_cursor_blink     (GtkTextView        *text_view);
 255 static void     gtk_text_view_pend_cursor_blink      (GtkTextView        *text_view);
 256 static void     gtk_text_view_stop_cursor_blink      (GtkTextView        *text_view);
 257
 258 static void gtk_text_view_value_changed           (GtkAdjustment *adj,
 259                                                    GtkTextView   *view);
 260 static void gtk_text_view_commit_handler          (GtkIMContext  *context,
 261                                                    const gchar   *str,
 262                                                    GtkTextView   *text_view);
 263 static void gtk_text_view_preedit_changed_handler (GtkIMContext  *context,
 264                                                    GtkTextView   *text_view);
 265
 266 static void gtk_text_view_mark_set_handler       (GtkTextBuffer     *buffer,
 267                                                   const GtkTextIter *location,
 268                                                   GtkTextMark       *mark,
 269                                                   gpointer           data);
 270 static void gtk_text_view_get_virtual_cursor_pos (GtkTextView       *text_view,
 271                                                   gint              *x,
 272                                                   gint              *y);
 273 static void gtk_text_view_set_virtual_cursor_pos (GtkTextView       *text_view,
 274                                                   gint               x,
 275                                                   gint               y);
 276
 277 static GtkAdjustment* get_hadjustment            (GtkTextView       *text_view);
 278 static GtkAdjustment* get_vadjustment            (GtkTextView       *text_view);
 279
 280 static void gtk_text_view_do_popup               (GtkTextView       *text_view,
 281                                                   GdkEventButton    *event);
 282
 283 static void gtk_text_view_queue_scroll           (GtkTextView   *text_view,
 284                                                   GtkTextMark   *mark,
 285                                                   gdouble        within_margin,
 286                                                   gboolean       use_align,
 287                                                   gdouble        xalign,
 288                                                   gdouble        yalign);
 289
 290 static gboolean gtk_text_view_flush_scroll       (GtkTextView *text_view);
 291 static void     gtk_text_view_update_adjustments (GtkTextView *text_view);
 292
 293 static void gtk_text_view_update_im_spot_location (GtkTextView *text_view);
 294
 295 /* Container methods */
 296 static void gtk_text_view_add    (GtkContainer *container,
 297                                   GtkWidget    *child);
 298 static void gtk_text_view_remove (GtkContainer *container,
 299                                   GtkWidget    *child);
 300 static void gtk_text_view_forall (GtkContainer *container,
 301                                   gboolean      include_internals,
 302                                   GtkCallback   callback,
 303                                   gpointer      callback_data);
 304
 305 /* FIXME probably need the focus methods. */
 306
 307 typedef struct _GtkTextViewChild GtkTextViewChild;
 308
 309 struct _GtkTextViewChild
 310 {
 311   GtkWidget *widget;
 312
 313   GtkTextChildAnchor *anchor;
 314
 315   gint from_top_of_line;
 316   gint from_left_of_buffer;
 317
 318   /* These are ignored if anchor != NULL */
 319   GtkTextWindowType type;
 320   gint x;
 321   gint y;
 322 };
 323
 324 static GtkTextViewChild* text_view_child_new_anchored      (GtkWidget          *child,
 325                                                             GtkTextChildAnchor *anchor,
 326                                                             GtkTextLayout      *layout);
 327 static GtkTextViewChild* text_view_child_new_window        (GtkWidget          *child,
 328                                                             GtkTextWindowType   type,
 329                                                             gint                x,
 330                                                             gint                y);
 331 static void              text_view_child_free              (GtkTextViewChild   *child);
 332 static void              text_view_child_set_parent_window (GtkTextView        *text_view,
 333                                                             GtkTextViewChild   *child);
 334
 335 struct _GtkTextWindow
 336 {
 337   GtkTextWindowType type;
 338   GtkWidget *widget;
 339   GdkWindow *window;
 340   GdkWindow *bin_window;
 341   GtkRequisition requisition;
 342   GdkRectangle allocation;
 343 };
 344
 345 static GtkTextWindow *text_window_new             (GtkTextWindowType  type,
 346                                                    GtkWidget         *widget,
 347                                                    gint               width_request,
 348                                                    gint               height_request);
 349 static void           text_window_free            (GtkTextWindow     *win);
 350 static void           text_window_realize         (GtkTextWindow     *win,
 351                                                    GdkWindow         *parent);
 352 static void           text_window_unrealize       (GtkTextWindow     *win);
 353 static void           text_window_size_allocate   (GtkTextWindow     *win,
 354                                                    GdkRectangle      *rect);
 355 static void           text_window_scroll          (GtkTextWindow     *win,
 356                                                    gint               dx,
 357                                                    gint               dy);
 358 static void           text_window_invalidate_rect (GtkTextWindow     *win,
 359                                                    GdkRectangle      *rect);
 360
 361 static gint           text_window_get_width       (GtkTextWindow     *win);
 362 static gint           text_window_get_height      (GtkTextWindow     *win);
 363 static void           text_window_get_allocation  (GtkTextWindow     *win,
 364                                                    GdkRectangle      *rect);
 365
 366
 367 enum
 368 {
 369   TARGET_STRING,
 370   TARGET_TEXT,
 371   TARGET_COMPOUND_TEXT,
 372   TARGET_UTF8_STRING,
 373   TARGET_TEXT_BUFFER_CONTENTS
 374 };
 375
 376 static GtkTargetEntry target_table[] = {
 377   { "GTK_TEXT_BUFFER_CONTENTS", GTK_TARGET_SAME_APP,
 378     TARGET_TEXT_BUFFER_CONTENTS },
 379   { "UTF8_STRING", 0, TARGET_UTF8_STRING },
 380   { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
 381   { "TEXT", 0, TARGET_TEXT },
 382   { "text/plain", 0, TARGET_STRING },
 383   { "STRING",     0, TARGET_STRING }
 384 };
 385
 386 static GtkContainerClass *parent_class = NULL;
 387 static guint signals[LAST_SIGNAL] = { 0 };
 388
 389 GtkType
 390 gtk_text_view_get_type (void)
 391 {
 392   static GtkType our_type = 0;
 393
 394   if (our_type == 0)
 395     {
 396       static const GtkTypeInfo our_info =
 397       {
 398         "GtkTextView",
 399         sizeof (GtkTextView),
 400         sizeof (GtkTextViewClass),
 401         (GtkClassInitFunc) gtk_text_view_class_init,
 402         (GtkObjectInitFunc) gtk_text_view_init,
 403         /* reserved_1 */ NULL,
 404         /* reserved_2 */ NULL,
 405         (GtkClassInitFunc) NULL
 406       };
 407
 408       our_type = gtk_type_unique (GTK_TYPE_CONTAINER, &our_info);
 409     }
 410
 411   return our_type;
 412 }
 413
 414 static void
 415 add_move_binding (GtkBindingSet  *binding_set,
 416                   guint           keyval,
 417                   guint           modmask,
 418                   GtkMovementStep step,
 419                   gint            count)
 420 {
 421   g_return_if_fail ((modmask & GDK_SHIFT_MASK) == 0);
 422
 423   gtk_binding_entry_add_signal (binding_set, keyval, modmask,
 424                                 "move_cursor", 3,
 425                                 GTK_TYPE_ENUM, step,
 426                                 GTK_TYPE_INT, count,
 427                                 GTK_TYPE_BOOL, FALSE);
 428
 429   /* Selection-extending version */
 430   gtk_binding_entry_add_signal (binding_set, keyval, modmask | GDK_SHIFT_MASK,
 431                                 "move_cursor", 3,
 432                                 GTK_TYPE_ENUM, step,
 433                                 GTK_TYPE_INT, count,
 434                                 GTK_TYPE_BOOL, TRUE);
 435 }
 436
 437 static void
 438 gtk_text_view_class_init (GtkTextViewClass *klass)
 439 {
 440   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 441   GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass);
 442   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 443   GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
 444   GtkBindingSet *binding_set;
 445
 446   parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
 447
 448   /* Default handlers and virtual methods
 449    */
 450   gobject_class->set_property = gtk_text_view_set_property;
 451   gobject_class->get_property = gtk_text_view_get_property;
 452
 453   object_class->destroy = gtk_text_view_destroy;
 454   gobject_class->finalize = gtk_text_view_finalize;
 455
 456   widget_class->realize = gtk_text_view_realize;
 457   widget_class->unrealize = gtk_text_view_unrealize;
 458   widget_class->style_set = gtk_text_view_style_set;
 459   widget_class->direction_changed = gtk_text_view_direction_changed;
 460   widget_class->size_request = gtk_text_view_size_request;
 461   widget_class->size_allocate = gtk_text_view_size_allocate;
 462   widget_class->event = gtk_text_view_event;
 463   widget_class->key_press_event = gtk_text_view_key_press_event;
 464   widget_class->key_release_event = gtk_text_view_key_release_event;
 465   widget_class->button_press_event = gtk_text_view_button_press_event;
 466   widget_class->button_release_event = gtk_text_view_button_release_event;
 467   widget_class->focus_in_event = gtk_text_view_focus_in_event;
 468   widget_class->focus_out_event = gtk_text_view_focus_out_event;
 469   widget_class->motion_notify_event = gtk_text_view_motion_event;
 470   widget_class->expose_event = gtk_text_view_expose_event;
 471
 472   widget_class->drag_begin = gtk_text_view_drag_begin;
 473   widget_class->drag_end = gtk_text_view_drag_end;
 474   widget_class->drag_data_get = gtk_text_view_drag_data_get;
 475   widget_class->drag_data_delete = gtk_text_view_drag_data_delete;
 476
 477   widget_class->drag_leave = gtk_text_view_drag_leave;
 478   widget_class->drag_motion = gtk_text_view_drag_motion;
 479   widget_class->drag_drop = gtk_text_view_drag_drop;
 480   widget_class->drag_data_received = gtk_text_view_drag_data_received;
 481
 482   widget_class->popup_menu = gtk_text_view_popup_menu;
 483
 484   container_class->add = gtk_text_view_add;
 485   container_class->remove = gtk_text_view_remove;
 486   container_class->forall = gtk_text_view_forall;
 487
 488   klass->move_cursor = gtk_text_view_move_cursor;
 489   klass->set_anchor = gtk_text_view_set_anchor;
 490   klass->insert_at_cursor = gtk_text_view_insert_at_cursor;
 491   klass->delete_from_cursor = gtk_text_view_delete_from_cursor;
 492   klass->cut_clipboard = gtk_text_view_cut_clipboard;
 493   klass->copy_clipboard = gtk_text_view_copy_clipboard;
 494   klass->paste_clipboard = gtk_text_view_paste_clipboard;
 495   klass->toggle_overwrite = gtk_text_view_toggle_overwrite;
 496   klass->set_scroll_adjustments = gtk_text_view_set_scroll_adjustments;
 497
 498   /*
 499    * Properties
 500    */
 501
 502   g_object_class_install_property (gobject_class,
 503                                    PROP_PIXELS_ABOVE_LINES,
 504                                    g_param_spec_int ("pixels_above_lines",
 505                                                      _("Pixels Above Lines"),
 506                                                      _("Pixels of blank space above paragraphs"),
 507                                                      0,
 508                                                      G_MAXINT,
 509                                                      0,
 510                                                      G_PARAM_READWRITE));
 511
 512   g_object_class_install_property (gobject_class,
 513                                    PROP_PIXELS_BELOW_LINES,
 514                                    g_param_spec_int ("pixels_below_lines",
 515                                                      _("Pixels Below Lines"),
 516                                                      _("Pixels of blank space below paragraphs"),
 517                                                      0,
 518                                                      G_MAXINT,
 519                                                      0,
 520                                                      G_PARAM_READWRITE));
 521
 522   g_object_class_install_property (gobject_class,
 523                                    PROP_PIXELS_INSIDE_WRAP,
 524                                    g_param_spec_int ("pixels_inside_wrap",
 525                                                      _("Pixels Inside Wrap"),
 526                                                      _("Pixels of blank space between wrapped lines in a paragraph"),
 527                                                      0,
 528                                                      G_MAXINT,
 529                                                      0,
 530                                                      G_PARAM_READWRITE));
 531
 532   g_object_class_install_property (gobject_class,
 533                                    PROP_EDITABLE,
 534                                    g_param_spec_boolean ("editable",
 535                                                          _("Editable"),
 536                                                          _("Whether the text can be modified by the user"),
 537                                                          TRUE,
 538                                                          G_PARAM_READWRITE));
 539
 540   g_object_class_install_property (gobject_class,
 541                                    PROP_WRAP_MODE,
 542                                    g_param_spec_enum ("wrap_mode",
 543                                                       _("Wrap Mode"),
 544                                                       _("Whether to wrap lines never, at word boundaries, or at character boundaries"),
 545                                                       GTK_TYPE_WRAP_MODE,
 546                                                       GTK_WRAP_NONE,
 547                                                       G_PARAM_READWRITE));
 548
 549   g_object_class_install_property (gobject_class,
 550                                    PROP_JUSTIFICATION,
 551                                    g_param_spec_enum ("justification",
 552                                                       _("Justification"),
 553                                                       _("Left, right, or center justification"),
 554                                                       GTK_TYPE_JUSTIFICATION,
 555                                                       GTK_JUSTIFY_LEFT,
 556                                                       G_PARAM_READWRITE));
 557
 558   g_object_class_install_property (gobject_class,
 559                                    PROP_LEFT_MARGIN,
 560                                    g_param_spec_int ("left_margin",
 561                                                      _("Left Margin"),
 562                                                      _("Width of the left margin in pixels"),
 563                                                      0,
 564                                                      G_MAXINT,
 565                                                      0,
 566                                                      G_PARAM_READWRITE));
 567
 568   g_object_class_install_property (gobject_class,
 569                                    PROP_RIGHT_MARGIN,
 570                                    g_param_spec_int ("right_margin",
 571                                                      _("Right Margin"),
 572                                                      _("Width of the right margin in pixels"),
 573                                                      0,
 574                                                      G_MAXINT,
 575                                                      0,
 576                                                      G_PARAM_READWRITE));
 577
 578   g_object_class_install_property (gobject_class,
 579                                    PROP_INDENT,
 580                                    g_param_spec_int ("indent",
 581                                                      _("Indent"),
 582                                                      _("Amount to indent the paragraph, in pixels"),
 583                                                      0,
 584                                                      G_MAXINT,
 585                                                      0,
 586                                                      G_PARAM_READWRITE));
 587
 588   g_object_class_install_property (gobject_class,
 589                                    PROP_TABS,
 590                                    g_param_spec_boxed ("tabs",
 591                                                        _("Tabs"),
 592                                                        _("Custom tabs for this text"),
 593                                                        PANGO_TYPE_TAB_ARRAY,
 594                                                        G_PARAM_READWRITE));
 595
 596   g_object_class_install_property (gobject_class,
 597                                    PROP_CURSOR_VISIBLE,
 598                                    g_param_spec_boolean ("cursor_visible",
 599                                                          _("Cursor Visible"),
 600                                                          _("If the insertion cursor is shown"),
 601                                                          TRUE,
 602                                                          G_PARAM_READWRITE));
 603
 604
 605   /*
 606    * Style properties
 607    */
 608
 609   gtk_widget_class_install_style_property (widget_class,
 610                                            g_param_spec_boxed ("cursor_color",
 611                                                                _("Cursor color"),
 612                                                                _("Color with which to draw insertion cursor"),
 613                                                                GDK_TYPE_COLOR,
 614                                                                G_PARAM_READABLE));
 615
 616
 617   /*
 618    * Signals
 619    */
 620
 621   signals[MOVE_CURSOR] =
 622     gtk_signal_new ("move_cursor",
 623                     GTK_RUN_LAST | GTK_RUN_ACTION,
 624                     GTK_CLASS_TYPE (object_class),
 625                     GTK_SIGNAL_OFFSET (GtkTextViewClass, move_cursor),
 626                     gtk_marshal_VOID__ENUM_INT_BOOLEAN,
 627                     GTK_TYPE_NONE, 3, GTK_TYPE_MOVEMENT_STEP, GTK_TYPE_INT, GTK_TYPE_BOOL);
 628
 629   signals[SET_ANCHOR] =
 630     gtk_signal_new ("set_anchor",
 631                     GTK_RUN_LAST | GTK_RUN_ACTION,
 632                     GTK_CLASS_TYPE (object_class),
 633                     GTK_SIGNAL_OFFSET (GtkTextViewClass, set_anchor),
 634                     gtk_marshal_VOID__VOID,
 635                     GTK_TYPE_NONE, 0);
 636
 637   signals[INSERT_AT_CURSOR] =
 638     gtk_signal_new ("insert_at_cursor",
 639                     GTK_RUN_LAST | GTK_RUN_ACTION,
 640                     GTK_CLASS_TYPE (object_class),
 641                     GTK_SIGNAL_OFFSET (GtkTextViewClass, insert_at_cursor),
 642                     gtk_marshal_VOID__STRING,
 643                     GTK_TYPE_NONE, 1, GTK_TYPE_STRING);
 644
 645   signals[DELETE_FROM_CURSOR] =
 646     gtk_signal_new ("delete_from_cursor",
 647                     GTK_RUN_LAST | GTK_RUN_ACTION,
 648                     GTK_CLASS_TYPE (object_class),
 649                     GTK_SIGNAL_OFFSET (GtkTextViewClass, delete_from_cursor),
 650                     gtk_marshal_VOID__ENUM_INT,
 651                     GTK_TYPE_NONE, 2, GTK_TYPE_DELETE_TYPE, GTK_TYPE_INT);
 652
 653   signals[CUT_CLIPBOARD] =
 654     gtk_signal_new ("cut_clipboard",
 655                     GTK_RUN_LAST | GTK_RUN_ACTION,
 656                     GTK_CLASS_TYPE (object_class),
 657                     GTK_SIGNAL_OFFSET (GtkTextViewClass, cut_clipboard),
 658                     gtk_marshal_VOID__VOID,
 659                     GTK_TYPE_NONE, 0);
 660
 661   signals[COPY_CLIPBOARD] =
 662     gtk_signal_new ("copy_clipboard",
 663                     GTK_RUN_LAST | GTK_RUN_ACTION,
 664                     GTK_CLASS_TYPE (object_class),
 665                     GTK_SIGNAL_OFFSET (GtkTextViewClass, copy_clipboard),
 666                     gtk_marshal_VOID__VOID,
 667                     GTK_TYPE_NONE, 0);
 668
 669   signals[PASTE_CLIPBOARD] =
 670     gtk_signal_new ("paste_clipboard",
 671                     GTK_RUN_LAST | GTK_RUN_ACTION,
 672                     GTK_CLASS_TYPE (object_class),
 673                     GTK_SIGNAL_OFFSET (GtkTextViewClass, paste_clipboard),
 674                     gtk_marshal_VOID__VOID,
 675                     GTK_TYPE_NONE, 0);
 676
 677   signals[TOGGLE_OVERWRITE] =
 678     gtk_signal_new ("toggle_overwrite",
 679                     GTK_RUN_LAST | GTK_RUN_ACTION,
 680                     GTK_CLASS_TYPE (object_class),
 681                     GTK_SIGNAL_OFFSET (GtkTextViewClass, toggle_overwrite),
 682                     gtk_marshal_VOID__VOID,
 683                     GTK_TYPE_NONE, 0);
 684
 685   signals[SET_SCROLL_ADJUSTMENTS] =
 686     gtk_signal_new ("set_scroll_adjustments",
 687                     GTK_RUN_LAST,
 688                     GTK_CLASS_TYPE (object_class),
 689                     GTK_SIGNAL_OFFSET (GtkTextViewClass, set_scroll_adjustments),
 690                     gtk_marshal_VOID__OBJECT_OBJECT,
 691                     GTK_TYPE_NONE, 2, GTK_TYPE_ADJUSTMENT, GTK_TYPE_ADJUSTMENT);
 692   widget_class->set_scroll_adjustments_signal = signals[SET_SCROLL_ADJUSTMENTS];
 693
 694   signals[POPULATE_POPUP] =
 695     gtk_signal_new ("populate_popup",
 696                     GTK_RUN_LAST,
 697                     GTK_CLASS_TYPE (object_class),
 698                     GTK_SIGNAL_OFFSET (GtkTextViewClass, populate_popup),
 699                     gtk_marshal_VOID__OBJECT,
 700                     GTK_TYPE_NONE, 1, GTK_TYPE_MENU);
 701
 702   /*
 703    * Key bindings
 704    */
 705
 706   binding_set = gtk_binding_set_by_class (klass);
 707
 708   /* Moving the insertion point */
 709   add_move_binding (binding_set, GDK_Right, 0,
 710                     GTK_MOVEMENT_VISUAL_POSITIONS, 1);
 711
 712   add_move_binding (binding_set, GDK_KP_Right, 0,
 713                     GTK_MOVEMENT_VISUAL_POSITIONS, 1);
 714
 715   add_move_binding (binding_set, GDK_Left, 0,
 716                     GTK_MOVEMENT_VISUAL_POSITIONS, -1);
 717
 718   add_move_binding (binding_set, GDK_KP_Left, 0,
 719                     GTK_MOVEMENT_VISUAL_POSITIONS, -1);
 720
 721   add_move_binding (binding_set, GDK_f, GDK_CONTROL_MASK,
 722                     GTK_MOVEMENT_LOGICAL_POSITIONS, 1);
 723
 724   add_move_binding (binding_set, GDK_b, GDK_CONTROL_MASK,
 725                     GTK_MOVEMENT_LOGICAL_POSITIONS, -1);
 726
 727   add_move_binding (binding_set, GDK_Right, GDK_CONTROL_MASK,
 728                     GTK_MOVEMENT_WORDS, 1);
 729
 730   add_move_binding (binding_set, GDK_KP_Right, GDK_CONTROL_MASK,
 731                     GTK_MOVEMENT_WORDS, 1);
 732
 733   add_move_binding (binding_set, GDK_Left, GDK_CONTROL_MASK,
 734                     GTK_MOVEMENT_WORDS, -1);
 735
 736   add_move_binding (binding_set, GDK_KP_Left, GDK_CONTROL_MASK,
 737                     GTK_MOVEMENT_WORDS, 1);
 738
 739   /* Eventually we want to move by display lines, not paragraphs */
 740   add_move_binding (binding_set, GDK_Up, 0,
 741                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 742
 743   add_move_binding (binding_set, GDK_KP_Up, 0,
 744                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 745
 746   add_move_binding (binding_set, GDK_Down, 0,
 747                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 748
 749   add_move_binding (binding_set, GDK_KP_Down, 0,
 750                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 751
 752   add_move_binding (binding_set, GDK_p, GDK_CONTROL_MASK,
 753                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 754
 755   add_move_binding (binding_set, GDK_n, GDK_CONTROL_MASK,
 756                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 757
 758   add_move_binding (binding_set, GDK_Up, GDK_CONTROL_MASK,
 759                     GTK_MOVEMENT_PARAGRAPHS, -1);
 760
 761   add_move_binding (binding_set, GDK_KP_Up, GDK_CONTROL_MASK,
 762                     GTK_MOVEMENT_PARAGRAPHS, -1);
 763
 764   add_move_binding (binding_set, GDK_Down, GDK_CONTROL_MASK,
 765                     GTK_MOVEMENT_PARAGRAPHS, 1);
 766
 767   add_move_binding (binding_set, GDK_KP_Down, GDK_CONTROL_MASK,
 768                     GTK_MOVEMENT_PARAGRAPHS, 1);
 769
 770   add_move_binding (binding_set, GDK_a, GDK_CONTROL_MASK,
 771                     GTK_MOVEMENT_PARAGRAPH_ENDS, -1);
 772
 773   add_move_binding (binding_set, GDK_e, GDK_CONTROL_MASK,
 774                     GTK_MOVEMENT_PARAGRAPH_ENDS, 1);
 775
 776   add_move_binding (binding_set, GDK_f, GDK_MOD1_MASK,
 777                     GTK_MOVEMENT_WORDS, 1);
 778
 779   add_move_binding (binding_set, GDK_b, GDK_MOD1_MASK,
 780                     GTK_MOVEMENT_WORDS, -1);
 781
 782   add_move_binding (binding_set, GDK_Home, 0,
 783                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
 784
 785   add_move_binding (binding_set, GDK_KP_Home, 0,
 786                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
 787
 788   add_move_binding (binding_set, GDK_End, 0,
 789                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
 790
 791   add_move_binding (binding_set, GDK_KP_End, 0,
 792                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
 793
 794   add_move_binding (binding_set, GDK_Home, GDK_CONTROL_MASK,
 795                     GTK_MOVEMENT_BUFFER_ENDS, -1);
 796
 797   add_move_binding (binding_set, GDK_KP_Home, GDK_CONTROL_MASK,
 798                     GTK_MOVEMENT_BUFFER_ENDS, -1);
 799
 800   add_move_binding (binding_set, GDK_End, GDK_CONTROL_MASK,
 801                     GTK_MOVEMENT_BUFFER_ENDS, 1);
 802
 803   add_move_binding (binding_set, GDK_KP_End, GDK_CONTROL_MASK,
 804                     GTK_MOVEMENT_BUFFER_ENDS, 1);
 805
 806   add_move_binding (binding_set, GDK_Page_Up, 0,
 807                     GTK_MOVEMENT_PAGES, -1);
 808
 809   add_move_binding (binding_set, GDK_KP_Page_Up, 0,
 810                     GTK_MOVEMENT_PAGES, -1);
 811
 812   add_move_binding (binding_set, GDK_Page_Down, 0,
 813                     GTK_MOVEMENT_PAGES, 1);
 814
 815   add_move_binding (binding_set, GDK_KP_Page_Down, 0,
 816                     GTK_MOVEMENT_PAGES, 1);
 817
 818   /* Setting the cut/paste/copy anchor */
 819   gtk_binding_entry_add_signal (binding_set, GDK_space, GDK_CONTROL_MASK,
 820                                 "set_anchor", 0);
 821   gtk_binding_entry_add_signal (binding_set, GDK_KP_Space, GDK_CONTROL_MASK,
 822                                 "set_anchor", 0);
 823
 824   /* Deleting text */
 825   gtk_binding_entry_add_signal (binding_set, GDK_Delete, 0,
 826                                 "delete_from_cursor", 2,
 827                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 828                                 GTK_TYPE_INT, 1);
 829
 830   gtk_binding_entry_add_signal (binding_set, GDK_KP_Delete, 0,
 831                                 "delete_from_cursor", 2,
 832                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 833                                 GTK_TYPE_INT, 1);
 834
 835   gtk_binding_entry_add_signal (binding_set, GDK_d, GDK_CONTROL_MASK,
 836                                 "delete_from_cursor", 2,
 837                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 838                                 GTK_TYPE_INT, 1);
 839
 840   gtk_binding_entry_add_signal (binding_set, GDK_BackSpace, 0,
 841                                 "delete_from_cursor", 2,
 842                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 843                                 GTK_TYPE_INT, -1);
 844
 845   gtk_binding_entry_add_signal (binding_set, GDK_Delete, GDK_CONTROL_MASK,
 846                                 "delete_from_cursor", 2,
 847                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 848                                 GTK_TYPE_INT, 1);
 849
 850   gtk_binding_entry_add_signal (binding_set, GDK_KP_Delete, GDK_CONTROL_MASK,
 851                                 "delete_from_cursor", 2,
 852                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 853                                 GTK_TYPE_INT, 1);
 854
 855   gtk_binding_entry_add_signal (binding_set, GDK_d, GDK_MOD1_MASK,
 856                                 "delete_from_cursor", 2,
 857                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 858                                 GTK_TYPE_INT, 1);
 859
 860   gtk_binding_entry_add_signal (binding_set, GDK_BackSpace, GDK_CONTROL_MASK,
 861                                 "delete_from_cursor", 2,
 862                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 863                                 GTK_TYPE_INT, -1);
 864
 865   gtk_binding_entry_add_signal (binding_set, GDK_k, GDK_CONTROL_MASK,
 866                                 "delete_from_cursor", 2,
 867                                 GTK_TYPE_ENUM, GTK_DELETE_PARAGRAPH_ENDS,
 868                                 GTK_TYPE_INT, 1);
 869
 870   gtk_binding_entry_add_signal (binding_set, GDK_u, GDK_CONTROL_MASK,
 871                                 "delete_from_cursor", 2,
 872                                 GTK_TYPE_ENUM, GTK_DELETE_PARAGRAPHS,
 873                                 GTK_TYPE_INT, 1);
 874
 875   gtk_binding_entry_add_signal (binding_set, GDK_space, GDK_MOD1_MASK,
 876                                 "delete_from_cursor", 2,
 877                                 GTK_TYPE_ENUM, GTK_DELETE_WHITESPACE,
 878                                 GTK_TYPE_INT, 1);
 879   gtk_binding_entry_add_signal (binding_set, GDK_KP_Space, GDK_MOD1_MASK,
 880                                 "delete_from_cursor", 2,
 881                                 GTK_TYPE_ENUM, GTK_DELETE_WHITESPACE,
 882                                 GTK_TYPE_INT, 1);
 883   gtk_binding_entry_add_signal (binding_set, GDK_space, GDK_MOD1_MASK,
 884                                 "insert_at_cursor", 1,
 885                                 GTK_TYPE_STRING, " ");
 886   gtk_binding_entry_add_signal (binding_set, GDK_KP_Space, GDK_MOD1_MASK,
 887                                 "insert_at_cursor", 1,
 888                                 GTK_TYPE_STRING, " ");
 889
 890   gtk_binding_entry_add_signal (binding_set, GDK_backslash, GDK_MOD1_MASK,
 891                                 "delete_from_cursor", 2,
 892                                 GTK_TYPE_ENUM, GTK_DELETE_WHITESPACE,
 893                                 GTK_TYPE_INT, 1);
 894
 895   /* Cut/copy/paste */
 896
 897   gtk_binding_entry_add_signal (binding_set, GDK_x, GDK_CONTROL_MASK,
 898                                 "cut_clipboard", 0);
 899
 900   gtk_binding_entry_add_signal (binding_set, GDK_w, GDK_CONTROL_MASK,
 901                                 "cut_clipboard", 0);
 902
 903   gtk_binding_entry_add_signal (binding_set, GDK_c, GDK_CONTROL_MASK,
 904                                 "copy_clipboard", 0);
 905
 906   gtk_binding_entry_add_signal (binding_set, GDK_v, GDK_CONTROL_MASK,
 907                                 "paste_clipboard", 0);
 908
 909   gtk_binding_entry_add_signal (binding_set, GDK_y, GDK_CONTROL_MASK,
 910                                 "paste_clipboard", 0);
 911
 912   /* Overwrite */
 913   gtk_binding_entry_add_signal (binding_set, GDK_Insert, 0,
 914                                 "toggle_overwrite", 0);
 915   gtk_binding_entry_add_signal (binding_set, GDK_KP_Insert, 0,
 916                                 "toggle_overwrite", 0);
 917 }
 918
 919 void
 920 gtk_text_view_init (GtkTextView *text_view)
 921 {
 922   GtkWidget *widget;
 923
 924   widget = GTK_WIDGET (text_view);
 925
 926   GTK_WIDGET_SET_FLAGS (widget, GTK_CAN_FOCUS);
 927
 928   /* Set up default style */
 929   text_view->wrap_mode = GTK_WRAP_NONE;
 930   text_view->pixels_above_lines = 0;
 931   text_view->pixels_below_lines = 0;
 932   text_view->pixels_inside_wrap = 0;
 933   text_view->justify = GTK_JUSTIFY_LEFT;
 934   text_view->left_margin = 0;
 935   text_view->right_margin = 0;
 936   text_view->indent = 0;
 937   text_view->tabs = NULL;
 938   text_view->editable = TRUE;
 939
 940   gtk_drag_dest_set (widget,
 941                      0,
 942                      target_table, G_N_ELEMENTS (target_table),
 943                      GDK_ACTION_COPY | GDK_ACTION_MOVE);
 944
 945   text_view->virtual_cursor_x = -1;
 946   text_view->virtual_cursor_y = -1;
 947
 948   /* This object is completely private. No external entity can gain a reference
 949    * to it; so we create it here and destroy it in finalize ().
 950    */
 951   text_view->im_context = gtk_im_multicontext_new ();
 952
 953   g_signal_connect (G_OBJECT (text_view->im_context), "commit",
 954                     G_CALLBACK (gtk_text_view_commit_handler), text_view);
 955
 956   g_signal_connect (G_OBJECT (text_view->im_context), "preedit_changed",
 957                     G_CALLBACK (gtk_text_view_preedit_changed_handler), text_view);
 958
 959   text_view->cursor_visible = TRUE;
 960
 961   text_view->text_window = text_window_new (GTK_TEXT_WINDOW_TEXT,
 962                                             widget, 200, 200);
 963
 964   text_view->drag_start_x = -1;
 965   text_view->drag_start_y = -1;
 966
 967   text_view->pending_place_cursor_button = 0;
 968 }
 969
 970 /**
 971  * gtk_text_view_new:
 972  *
 973  * Creates a new #GtkTextView. If you don't call gtk_text_view_set_buffer()
 974  * before using the text view, an empty default buffer will be created
 975  * for you. Get the buffer with gtk_text_view_get_buffer(). If you want
 976  * to specify your own buffer, consider gtk_text_view_new_with_buffer().
 977  *
 978  * Return value: a new #GtkTextView
 979  **/
 980 GtkWidget*
 981 gtk_text_view_new (void)
 982 {
 983   return GTK_WIDGET (gtk_type_new (gtk_text_view_get_type ()));
 984 }
 985
 986 /**
 987  * gtk_text_view_new_with_buffer:
 988  * @buffer: a #GtkTextBuffer
 989  *
 990  * Creates a new #GtkTextView widget displaying the buffer
 991  * @buffer. One buffer can be shared among many widgets.
 992  * @buffer may be NULL to create a default buffer, in which case
 993  * this function is equivalent to gtk_text_view_new(). The
 994  * text view adds its own reference count to the buffer; it does not
 995  * take over an existing reference.
 996  *
 997  * Return value: a new #GtkTextView.
 998  **/
 999 GtkWidget*
1000 gtk_text_view_new_with_buffer (GtkTextBuffer *buffer)
1001 {
1002   GtkTextView *text_view;
1003
1004   text_view = (GtkTextView*)gtk_text_view_new ();
1005
1006   gtk_text_view_set_buffer (text_view, buffer);
1007
1008   return GTK_WIDGET (text_view);
1009 }
1010
1011 /**
1012  * gtk_text_view_set_buffer:
1013  * @text_view: a #GtkTextView
1014  * @buffer: a #GtkTextBuffer
1015  *
1016  * Sets @buffer as the buffer being displayed by @text_view. The previous
1017  * buffer displayed by the text view is unreferenced, and a reference is
1018  * added to @buffer. If you owned a reference to @buffer before passing it
1019  * to this function, you must remove that reference yourself; #GtkTextView
1020  * will not "adopt" it.
1021  *
1022  **/
1023 void
1024 gtk_text_view_set_buffer (GtkTextView   *text_view,
1025                           GtkTextBuffer *buffer)
1026 {
1027   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1028   g_return_if_fail (buffer == NULL || GTK_IS_TEXT_BUFFER (buffer));
1029
1030   if (text_view->buffer == buffer)
1031     return;
1032
1033   if (text_view->buffer != NULL)
1034     {
1035       /* Destroy all anchored children */
1036       GSList *tmp_list;
1037       GSList *copy;
1038
1039       copy = g_slist_copy (text_view->children);
1040       tmp_list = copy;
1041       while (tmp_list != NULL)
1042         {
1043           GtkTextViewChild *vc = tmp_list->data;
1044
1045           if (vc->anchor)
1046             {
1047               gtk_widget_destroy (vc->widget);
1048               /* vc may now be invalid! */
1049             }
1050
1051           tmp_list = g_slist_next (tmp_list);
1052         }
1053
1054       g_slist_free (copy);
1055
1056       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->buffer),
1057                                             gtk_text_view_mark_set_handler, text_view);
1058       g_object_unref (G_OBJECT (text_view->buffer));
1059       text_view->dnd_mark = NULL;
1060
1061       if (GTK_WIDGET_REALIZED (text_view))
1062         gtk_text_buffer_remove_selection_clipboard (text_view->buffer,
1063                                                     gtk_clipboard_get (GDK_SELECTION_PRIMARY));
1064     }
1065
1066   text_view->buffer = buffer;
1067
1068   if (buffer != NULL)
1069     {
1070       GtkTextIter start;
1071
1072       g_object_ref (G_OBJECT (buffer));
1073
1074       if (text_view->layout)
1075         gtk_text_layout_set_buffer (text_view->layout, buffer);
1076
1077       gtk_text_buffer_get_iter_at_offset (text_view->buffer, &start, 0);
1078
1079       text_view->dnd_mark = gtk_text_buffer_create_mark (text_view->buffer,
1080                                                          "gtk_drag_target",
1081                                                          &start, FALSE);
1082
1083       text_view->first_para_mark = gtk_text_buffer_create_mark (text_view->buffer,
1084                                                                 NULL,
1085                                                                 &start, TRUE);
1086
1087       text_view->first_para_pixels = 0;
1088
1089       g_signal_connect (G_OBJECT (text_view->buffer), "mark_set",
1090                         G_CALLBACK (gtk_text_view_mark_set_handler), text_view);
1091
1092       if (GTK_WIDGET_REALIZED (text_view))
1093         gtk_text_buffer_add_selection_clipboard (text_view->buffer,
1094                                                  gtk_clipboard_get (GDK_SELECTION_PRIMARY));
1095     }
1096
1097   if (GTK_WIDGET_VISIBLE (text_view))
1098     gtk_widget_queue_draw (GTK_WIDGET (text_view));
1099 }
1100
1101 static GtkTextBuffer*
1102 get_buffer (GtkTextView *text_view)
1103 {
1104   if (text_view->buffer == NULL)
1105     {
1106       GtkTextBuffer *b;
1107       b = gtk_text_buffer_new (NULL);
1108       gtk_text_view_set_buffer (text_view, b);
1109       g_object_unref (G_OBJECT (b));
1110     }
1111
1112   return text_view->buffer;
1113 }
1114
1115 /**
1116  * gtk_text_view_get_buffer:
1117  * @text_view: a #GtkTextView
1118  *
1119  * Returns the #GtkTextBuffer being displayed by this text view.
1120  * The reference count on the buffer is not incremented; the caller
1121  * of this function won't own a new reference.
1122  *
1123  * Return value: a #GtkTextBuffer
1124  **/
1125 GtkTextBuffer*
1126 gtk_text_view_get_buffer (GtkTextView *text_view)
1127 {
1128   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
1129
1130   return get_buffer (text_view);
1131 }
1132
1133 /**
1134  * gtk_text_view_get_iter_at_location:
1135  * @text_view: a #GtkTextView
1136  * @iter: a #GtkTextIter
1137  * @x: x position, in buffer coordinates
1138  * @y: y position, in buffer coordinates
1139  *
1140  * Retrieves the iterator at buffer coordinates @x and @y. Buffer
1141  * coordinates are coordinates for the entire buffer, not just the
1142  * currently-displayed portion.  If you have coordinates from an
1143  * event, you have to convert those to buffer coordinates with
1144  * gtk_text_view_window_to_buffer_coords().
1145  *
1146  **/
1147 void
1148 gtk_text_view_get_iter_at_location (GtkTextView *text_view,
1149                                     GtkTextIter *iter,
1150                                     gint         x,
1151                                     gint         y)
1152 {
1153   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1154   g_return_if_fail (iter != NULL);
1155   g_return_if_fail (text_view->layout != NULL);
1156
1157   gtk_text_layout_get_iter_at_pixel (text_view->layout,
1158                                      iter,
1159                                      x,
1160                                      y);
1161 }
1162
1163 /**
1164  * gtk_text_view_get_iter_location:
1165  * @text_view: a #GtkTextView
1166  * @iter: a #GtkTextIter
1167  * @location: bounds of the character at @iter
1168  *
1169  * Gets a rectangle which roughly contains the character at @iter.
1170  * The rectangle position is in buffer coordinates; use
1171  * gtk_text_view_buffer_to_window_coords() to convert these
1172  * coordinates to coordinates for one of the windows in the text view.
1173  *
1174  **/
1175 void
1176 gtk_text_view_get_iter_location (GtkTextView       *text_view,
1177                                  const GtkTextIter *iter,
1178                                  GdkRectangle      *location)
1179 {
1180   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1181   g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
1182
1183   gtk_text_layout_get_iter_location (text_view->layout, iter, location);
1184 }
1185
1186 /**
1187  * gtk_text_view_get_line_yrange:
1188  * @text_view: a #GtkTextView
1189  * @iter: a #GtkTextIter
1190  * @y: return location for a y coordinate
1191  * @height: return location for a height
1192  *
1193  * Gets the y coordinate of the top of the line containing @iter,
1194  * and the height of the line. The coordinate is a buffer coordinate;
1195  * convert to window coordinates with gtk_text_view_buffer_to_window_coords().
1196  *
1197  **/
1198 void
1199 gtk_text_view_get_line_yrange (GtkTextView       *text_view,
1200                                const GtkTextIter *iter,
1201                                gint              *y,
1202                                gint              *height)
1203 {
1204   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1205   g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
1206
1207   gtk_text_layout_get_line_yrange (text_view->layout,
1208                                    iter,
1209                                    y,
1210                                    height);
1211 }
1212
1213 /**
1214  * gtk_text_view_get_line_at_y:
1215  * @text_view: a #GtkTextView
1216  * @target_iter: a #GtkTextIter
1217  * @y: a y coordinate
1218  * @line_top: return location for top coordinate of the line
1219  *
1220  * Gets the #GtkTextIter at the start of the line containing
1221  * the coordinate @y. @y is in buffer coordinates, convert from
1222  * window coordinates with gtk_text_view_window_to_buffer_coords().
1223  * If non-%NULL, @line_top will be filled with the coordinate of the top
1224  * edge of the line.
1225  **/
1226 void
1227 gtk_text_view_get_line_at_y (GtkTextView *text_view,
1228                              GtkTextIter *target_iter,
1229                              gint         y,
1230                              gint        *line_top)
1231 {
1232   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1233
1234   gtk_text_layout_get_line_at_y (text_view->layout,
1235                                  target_iter,
1236                                  y,
1237                                  line_top);
1238 }
1239
1240 static gboolean
1241 set_adjustment_clamped (GtkAdjustment *adj, gdouble val)
1242 {
1243   DV (g_print ("  Setting adj to raw value %g\n", val));
1244
1245   /* We don't really want to clamp to upper; we want to clamp to
1246      upper - page_size which is the highest value the scrollbar
1247      will let us reach. */
1248   if (val > (adj->upper - adj->page_size))
1249     val = adj->upper - adj->page_size;
1250
1251   if (val < adj->lower)
1252     val = adj->lower;
1253
1254   if (val != adj->value)
1255     {
1256       DV (g_print ("  Setting adj to clamped value %g\n", val));
1257       gtk_adjustment_set_value (adj, val);
1258       return TRUE;
1259     }
1260   else
1261     return FALSE;
1262 }
1263
1264 /**
1265  * gtk_text_view_scroll_to_iter:
1266  * @text_view: a #GtkTextView
1267  * @iter: a #GtkTextIter
1268  * @within_margin: margin as a [0.0,0.5) fraction of screen size
1269  * @use_align: whether to use alignment arguments (if %FALSE, just get the mark onscreen)
1270  * @xalign: horizontal alignment of mark within visible area.
1271  * @yalign: vertical alignment of mark within visible area
1272  *
1273  * Scrolls @text_view so that @iter is on the screen in the position
1274  * indicated by @xalign and @yalign. An alignment of 0.0 indicates
1275  * left or top, 1.0 indicates right or bottom, 0.5 means center. If @use_align
1276  * is %FALSE, the text scrolls the minimal distance to get the mark onscreen,
1277  * possibly not scrolling at all. The effective screen for purposes
1278  * of this function is reduced by a margin of size @within_margin.
1279  * NOTE: This function uses the currently-computed height of the
1280  * lines in the text buffer. Note that line heights are computed
1281  * in an idle handler; so this function may not have the desired effect
1282  * if it's called before the height computations. To avoid oddness,
1283  * consider using gtk_text_view_scroll_to_mark() which saves a point
1284  * to be scrolled to after line validation.
1285  *
1286  * Return value: %TRUE if scrolling occurred
1287  **/
1288 gboolean
1289 gtk_text_view_scroll_to_iter (GtkTextView   *text_view,
1290                               GtkTextIter   *iter,
1291                               gdouble        within_margin,
1292                               gboolean       use_align,
1293                               gdouble        xalign,
1294                               gdouble        yalign)
1295 {
1296   GdkRectangle rect;
1297   GdkRectangle screen;
1298   gint screen_bottom;
1299   gint screen_right;
1300   gint scroll_dest;
1301   GtkWidget *widget;
1302   gboolean retval = FALSE;
1303   gint scroll_inc;
1304   gint screen_xoffset, screen_yoffset;
1305   gint current_x_scroll, current_y_scroll;
1306
1307   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1308   g_return_val_if_fail (iter != NULL, FALSE);
1309   g_return_val_if_fail (within_margin >= 0.0 && within_margin < 0.5, FALSE);
1310   g_return_val_if_fail (xalign >= 0.0 && xalign <= 1.0, FALSE);
1311   g_return_val_if_fail (yalign >= 0.0 && yalign <= 1.0, FALSE);
1312
1313   widget = GTK_WIDGET (text_view);
1314
1315   DV(g_print(G_STRLOC"\n"));
1316
1317   if (!GTK_WIDGET_MAPPED (widget))
1318     {
1319       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");
1320       return FALSE;
1321     }
1322
1323   gtk_text_layout_get_iter_location (text_view->layout,
1324                                      iter,
1325                                      &rect);
1326
1327   DV (g_print (" target rect %d,%d  %d x %d\n", rect.x, rect.y, rect.width, rect.height));
1328
1329   current_x_scroll = text_view->xoffset;
1330   current_y_scroll = text_view->yoffset;
1331
1332   screen.x = current_x_scroll;
1333   screen.y = current_y_scroll;
1334   screen.width = SCREEN_WIDTH (widget);
1335   screen.height = SCREEN_HEIGHT (widget);
1336
1337   screen_xoffset = screen.width * within_margin;
1338   screen_yoffset = screen.height * within_margin;
1339
1340   screen.x += screen_xoffset;
1341   screen.y += screen_yoffset;
1342   screen.width -= screen_xoffset * 2;
1343   screen.height -= screen_yoffset * 2;
1344
1345   /* paranoia check */
1346   if (screen.width < 1)
1347     screen.width = 1;
1348   if (screen.height < 1)
1349     screen.height = 1;
1350
1351   screen_right = screen.x + screen.width;
1352   screen_bottom = screen.y + screen.height;
1353
1354   /* The alignment affects the point in the target character that we
1355    * choose to align. If we're doing right/bottom alignment, we align
1356    * the right/bottom edge of the character the mark is at; if we're
1357    * doing left/top we align the left/top edge of the character; if
1358    * we're doing center alignment we align the center of the
1359    * character.
1360    */
1361
1362   /* Vertical scroll */
1363
1364   scroll_inc = 0;
1365   scroll_dest = current_y_scroll;
1366
1367   if (use_align)
1368     {
1369       scroll_dest = rect.y + (rect.height * yalign) - (screen.height * yalign);
1370
1371       /* if scroll_dest < screen.y, we move a negative increment (up),
1372        * else a positive increment (down)
1373        */
1374       scroll_inc = scroll_dest - screen.y + screen_yoffset;
1375     }
1376   else
1377     {
1378       /* move minimum to get onscreen */
1379       if (rect.y < screen.y)
1380         {
1381           scroll_dest = rect.y;
1382           scroll_inc = scroll_dest - screen.y - screen_yoffset;
1383         }
1384       else if ((rect.y + rect.height) > screen_bottom)
1385         {
1386           scroll_dest = rect.y + rect.height;
1387           scroll_inc = scroll_dest - screen_bottom + screen_yoffset;
1388         }
1389     }
1390
1391   if (scroll_inc != 0)
1392     {
1393       retval = set_adjustment_clamped (get_vadjustment (text_view),
1394                                        current_y_scroll + scroll_inc);
1395
1396       DV (g_print (" vert increment %d\n", scroll_inc));
1397     }
1398
1399   /* Horizontal scroll */
1400
1401   scroll_inc = 0;
1402   scroll_dest = current_x_scroll;
1403
1404   if (use_align)
1405     {
1406       scroll_dest = rect.x + (rect.width * xalign) - (screen.width * xalign);
1407
1408       /* if scroll_dest < screen.y, we move a negative increment (left),
1409        * else a positive increment (right)
1410        */
1411       scroll_inc = scroll_dest - screen.x + screen_xoffset;
1412     }
1413   else
1414     {
1415       /* move minimum to get onscreen */
1416       if (rect.x < screen.x)
1417         {
1418           scroll_dest = rect.x;
1419           scroll_inc = scroll_dest - screen.x - screen_xoffset;
1420         }
1421       else if ((rect.x + rect.width) > screen_right)
1422         {
1423           scroll_dest = rect.x + rect.width;
1424           scroll_inc = scroll_dest - screen_right + screen_xoffset;
1425         }
1426     }
1427
1428   if (scroll_inc != 0)
1429     {
1430       retval = set_adjustment_clamped (get_hadjustment (text_view),
1431                                        current_x_scroll + scroll_inc);
1432
1433       DV (g_print (" horiz increment %d\n", scroll_inc));
1434     }
1435
1436   if (retval)
1437     DV(g_print (">Actually scrolled ("G_STRLOC")\n"));
1438   else
1439     DV(g_print (">Didn't end up scrolling ("G_STRLOC")\n"));
1440
1441   return retval;
1442 }
1443
1444 static void
1445 free_pending_scroll (GtkTextPendingScroll *scroll)
1446 {
1447   if (!gtk_text_mark_get_deleted (scroll->mark))
1448     gtk_text_buffer_delete_mark (gtk_text_mark_get_buffer (scroll->mark),
1449                                  scroll->mark);
1450   g_object_unref (G_OBJECT (scroll->mark));
1451   g_free (scroll);
1452 }
1453
1454 static void
1455 gtk_text_view_queue_scroll (GtkTextView   *text_view,
1456                             GtkTextMark   *mark,
1457                             gdouble        within_margin,
1458                             gboolean       use_align,
1459                             gdouble        xalign,
1460                             gdouble        yalign)
1461 {
1462   GtkTextIter iter;
1463   GtkTextPendingScroll *scroll;
1464
1465   DV(g_print(G_STRLOC"\n"));
1466
1467   scroll = g_new (GtkTextPendingScroll, 1);
1468
1469   scroll->within_margin = within_margin;
1470   scroll->use_align = use_align;
1471   scroll->xalign = xalign;
1472   scroll->yalign = yalign;
1473
1474   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
1475
1476   scroll->mark = gtk_text_buffer_create_mark (get_buffer (text_view),
1477                                               NULL,
1478                                               &iter,
1479                                               gtk_text_mark_get_left_gravity (mark));
1480
1481   g_object_ref (G_OBJECT (scroll->mark));
1482
1483   if (text_view->pending_scroll)
1484     free_pending_scroll (text_view->pending_scroll);
1485
1486   text_view->pending_scroll = scroll;
1487 }
1488
1489 static gboolean
1490 gtk_text_view_flush_scroll (GtkTextView *text_view)
1491 {
1492   GtkTextIter iter;
1493   GtkTextPendingScroll *scroll;
1494   gboolean retval;
1495
1496   DV(g_print(G_STRLOC"\n"));
1497
1498   if (text_view->pending_scroll == NULL)
1499     return FALSE;
1500
1501   scroll = text_view->pending_scroll;
1502
1503   /* avoid recursion */
1504   text_view->pending_scroll = NULL;
1505
1506   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, scroll->mark);
1507
1508   /* Validate arbitrary area around the scroll destination, so the adjustment
1509    * can meaningfully point into that area
1510    */
1511   DV(g_print (">Validating scroll destination ("G_STRLOC")\n"));
1512   gtk_text_layout_validate_yrange (text_view->layout, &iter, -300, 300);
1513
1514   DV(g_print (">Done validating scroll destination ("G_STRLOC")\n"));
1515
1516   /* Ensure we have updated width/height */
1517   gtk_text_view_update_adjustments (text_view);
1518
1519   retval = gtk_text_view_scroll_to_iter (text_view,
1520                                          &iter,
1521                                          scroll->within_margin,
1522                                          scroll->use_align,
1523                                          scroll->xalign,
1524                                          scroll->yalign);
1525
1526   free_pending_scroll (scroll);
1527
1528   return retval;
1529 }
1530
1531 static void
1532 gtk_text_view_set_adjustment_upper (GtkAdjustment *adj, gdouble upper)
1533 {
1534   if (upper != adj->upper)
1535     {
1536       gdouble min = MAX (0.0, upper - adj->page_size);
1537       gboolean value_changed = FALSE;
1538
1539       adj->upper = upper;
1540
1541       if (adj->value > min)
1542         {
1543           adj->value = min;
1544           value_changed = TRUE;
1545         }
1546
1547       gtk_signal_emit_by_name (GTK_OBJECT (adj), "changed");
1548       DV(g_print(">Changed adj upper to %g ("G_STRLOC")\n", upper));
1549
1550       if (value_changed)
1551         {
1552           DV(g_print(">Changed adj value because upper decreased ("G_STRLOC")\n"));
1553           gtk_signal_emit_by_name (GTK_OBJECT (adj), "value_changed");
1554         }
1555     }
1556 }
1557
1558 static void
1559 gtk_text_view_update_adjustments (GtkTextView *text_view)
1560 {
1561   gint width = 0, height = 0;
1562
1563   DV(g_print(">Updating adjustments ("G_STRLOC")\n"));
1564
1565   gtk_text_layout_get_size (text_view->layout, &width, &height);
1566
1567   if (text_view->width != width || text_view->height != height)
1568     {
1569       text_view->width = width;
1570       text_view->height = height;
1571
1572       gtk_text_view_set_adjustment_upper (get_hadjustment (text_view),
1573                                           MAX (SCREEN_WIDTH (text_view), width));
1574       gtk_text_view_set_adjustment_upper (get_vadjustment (text_view),
1575                                           MAX (SCREEN_HEIGHT (text_view), height));
1576
1577       /* hadj/vadj exist since we called get_hadjustment/get_vadjustment above */
1578
1579       /* Set up the step sizes; we'll say that a page is
1580          our allocation minus one step, and a step is
1581          1/10 of our allocation. */
1582       text_view->hadjustment->step_increment =
1583         SCREEN_WIDTH (text_view) / 10.0;
1584       text_view->hadjustment->page_increment =
1585         SCREEN_WIDTH (text_view) * 0.9;
1586
1587       text_view->vadjustment->step_increment =
1588         SCREEN_HEIGHT (text_view) / 10.0;
1589       text_view->vadjustment->page_increment =
1590         SCREEN_HEIGHT (text_view) * 0.9;
1591
1592       gtk_signal_emit_by_name (GTK_OBJECT (get_hadjustment (text_view)), "changed");
1593       gtk_signal_emit_by_name (GTK_OBJECT (get_hadjustment (text_view)), "changed");
1594     }
1595 }
1596
1597 static void
1598 gtk_text_view_update_layout_width (GtkTextView *text_view)
1599 {
1600   DV(g_print(">Updating layout width ("G_STRLOC")\n"));
1601
1602   gtk_text_view_ensure_layout (text_view);
1603
1604   gtk_text_layout_set_screen_width (text_view->layout,
1605                                     SCREEN_WIDTH (text_view));
1606 }
1607
1608 static void
1609 gtk_text_view_update_im_spot_location (GtkTextView *text_view)
1610 {
1611   GdkRectangle area;
1612   gint cursor_x_pos, cursor_y_pos;
1613
1614   if (text_view->layout == NULL)
1615     return;
1616
1617   gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, &cursor_y_pos);
1618
1619   area.x = cursor_x_pos;
1620   area.y = cursor_y_pos;
1621   area.width = area.height = 0;
1622
1623   gtk_im_context_set_cursor_location (text_view->im_context, &area);
1624 }
1625
1626 /**
1627  * gtk_text_view_scroll_to_mark:
1628  * @text_view: a #GtkTextView
1629  * @mark: a #GtkTextMark
1630  * @within_margin: margin as a [0.0,0.5) fraction of screen size
1631  * @use_align: whether to use alignment arguments (if %FALSE, just get the mark onscreen)
1632  * @xalign: horizontal alignment of mark within visible area.
1633  * @yalign: vertical alignment of mark within visible area
1634  *
1635  * Scrolls @text_view so that @mark is on the screen in the position
1636  * indicated by @xalign and @yalign. An alignment of 0.0 indicates
1637  * left or top, 1.0 indicates right or bottom, 0.5 means center. If @use_align
1638  * is %FALSE, the text scrolls the minimal distance to get the mark onscreen,
1639  * possibly not scrolling at all. The effective screen for purposes
1640  * of this function is reduced by a margin of size @within_margin.
1641  *
1642  **/
1643 void
1644 gtk_text_view_scroll_to_mark (GtkTextView *text_view,
1645                               GtkTextMark *mark,
1646                               gdouble      within_margin,
1647                               gboolean     use_align,
1648                               gdouble      xalign,
1649                               gdouble      yalign)
1650 {
1651   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1652   g_return_if_fail (GTK_IS_TEXT_MARK (mark));
1653   g_return_if_fail (within_margin >= 0.0 && within_margin < 0.5);
1654   g_return_if_fail (xalign >= 0.0 && xalign <= 1.0);
1655   g_return_if_fail (yalign >= 0.0 && yalign <= 1.0);
1656
1657   gtk_text_view_queue_scroll (text_view, mark,
1658                               within_margin,
1659                               use_align,
1660                               xalign,
1661                               yalign);
1662
1663   /* If no validation is pending, we need to go ahead and force an
1664    * immediate scroll.
1665    */
1666   if (text_view->layout &&
1667       gtk_text_layout_is_valid (text_view->layout))
1668     gtk_text_view_flush_scroll (text_view);
1669 }
1670
1671 void
1672 gtk_text_view_scroll_mark_onscreen (GtkTextView *text_view,
1673                                     GtkTextMark *mark)
1674 {
1675   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1676   g_return_if_fail (GTK_IS_TEXT_MARK (mark));
1677
1678   gtk_text_view_scroll_to_mark (text_view, mark, 0.0, FALSE, 0.0, 0.0);
1679 }
1680
1681 static gboolean
1682 clamp_iter_onscreen (GtkTextView *text_view, GtkTextIter *iter)
1683 {
1684   GdkRectangle visible_rect;
1685   gtk_text_view_get_visible_rect (text_view, &visible_rect);
1686
1687   return gtk_text_layout_clamp_iter_to_vrange (text_view->layout, iter,
1688                                                visible_rect.y,
1689                                                visible_rect.y + visible_rect.height);
1690 }
1691
1692 /**
1693  * gtk_text_view_move_mark_onscreen:
1694  * @text_view: a #GtkTextView
1695  * @mark: a #GtkTextMark
1696  *
1697  * Moves a mark within the buffer so that it's
1698  * located within the currently-visible text area.
1699  *
1700  * Return value: %TRUE if the mark moved (wasn't already onscreen)
1701  **/
1702 gboolean
1703 gtk_text_view_move_mark_onscreen (GtkTextView *text_view,
1704                                   GtkTextMark *mark)
1705 {
1706   GtkTextIter iter;
1707
1708   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1709   g_return_val_if_fail (mark != NULL, FALSE);
1710
1711   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
1712
1713   if (clamp_iter_onscreen (text_view, &iter))
1714     {
1715       gtk_text_buffer_move_mark (get_buffer (text_view), mark, &iter);
1716       return TRUE;
1717     }
1718   else
1719     return FALSE;
1720 }
1721
1722 /**
1723  * gtk_text_view_get_visible_rect:
1724  * @text_view: a #GtkTextView
1725  * @visible_rect: rectangle to fill
1726  *
1727  * Fills @visible_rect with the currently-visible
1728  * region of the buffer, in buffer coordinates. Convert to window coordinates
1729  * with gtk_text_view_buffer_to_window_coords().
1730  **/
1731 void
1732 gtk_text_view_get_visible_rect (GtkTextView  *text_view,
1733                                 GdkRectangle *visible_rect)
1734 {
1735   GtkWidget *widget;
1736
1737   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1738
1739   widget = GTK_WIDGET (text_view);
1740
1741   if (visible_rect)
1742     {
1743       visible_rect->x = text_view->xoffset;
1744       visible_rect->y = text_view->yoffset;
1745       visible_rect->width = SCREEN_WIDTH (widget);
1746       visible_rect->height = SCREEN_HEIGHT (widget);
1747
1748       DV(g_print(" visible rect: %d,%d %d x %d\n",
1749                  visible_rect->x,
1750                  visible_rect->y,
1751                  visible_rect->width,
1752                  visible_rect->height));
1753     }
1754 }
1755
1756 /**
1757  * gtk_text_view_set_wrap_mode:
1758  * @text_view: a #GtkTextView
1759  * @wrap_mode: a #GtkWrapMode
1760  *
1761  * Sets the line wrapping for the view.
1762  **/
1763 void
1764 gtk_text_view_set_wrap_mode (GtkTextView *text_view,
1765                              GtkWrapMode  wrap_mode)
1766 {
1767   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1768
1769   if (text_view->wrap_mode != wrap_mode)
1770     {
1771       text_view->wrap_mode = wrap_mode;
1772
1773       if (text_view->layout)
1774         {
1775           text_view->layout->default_style->wrap_mode = wrap_mode;
1776           gtk_text_layout_default_style_changed (text_view->layout);
1777         }
1778     }
1779
1780   g_object_notify (G_OBJECT (text_view), "wrap_mode");
1781 }
1782
1783 /**
1784  * gtk_text_view_get_wrap_mode:
1785  * @text_view: a #GtkTextView
1786  *
1787  * Gets the line wrapping for the view.
1788  *
1789  * Return value: the line wrap setting
1790  **/
1791 GtkWrapMode
1792 gtk_text_view_get_wrap_mode (GtkTextView *text_view)
1793 {
1794   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_WRAP_NONE);
1795
1796   return text_view->wrap_mode;
1797 }
1798
1799 /**
1800  * gtk_text_view_set_editable:
1801  * @text_view: a #GtkTextView
1802  * @setting: whether it's editable
1803  *
1804  * Sets the default editability of the #GtkTextView. You can override
1805  * this default setting with tags in the buffer, using the "editable"
1806  * attribute of tags.
1807  **/
1808 void
1809 gtk_text_view_set_editable (GtkTextView *text_view,
1810                             gboolean     setting)
1811 {
1812   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1813
1814   if (text_view->editable != setting)
1815     {
1816       text_view->editable = setting;
1817
1818       if (text_view->layout)
1819         {
1820           text_view->layout->default_style->editable = text_view->editable;
1821           gtk_text_layout_default_style_changed (text_view->layout);
1822         }
1823     }
1824
1825   g_object_notify (G_OBJECT (text_view), "editable");
1826 }
1827
1828 /**
1829  * gtk_text_view_get_editable:
1830  * @text_view: a #GtkTextView
1831  *
1832  * Returns the default editability of the #GtkTextView. Tags in the
1833  * buffer may override this setting for some ranges of text.
1834  *
1835  * Return value: whether text is editable by default
1836  **/
1837 gboolean
1838 gtk_text_view_get_editable (GtkTextView *text_view)
1839 {
1840   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1841
1842   return text_view->editable;
1843 }
1844
1845 void
1846 gtk_text_view_set_pixels_above_lines (GtkTextView *text_view,
1847                                       gint         pixels_above_lines)
1848 {
1849   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1850
1851   if (text_view->pixels_above_lines != pixels_above_lines)
1852     {
1853       text_view->pixels_above_lines = pixels_above_lines;
1854
1855       if (text_view->layout)
1856         {
1857           text_view->layout->default_style->pixels_above_lines = pixels_above_lines;
1858           gtk_text_layout_default_style_changed (text_view->layout);
1859         }
1860     }
1861
1862   g_object_notify (G_OBJECT (text_view), "pixels_above_lines");
1863 }
1864
1865 gint
1866 gtk_text_view_get_pixels_above_lines (GtkTextView *text_view)
1867 {
1868   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1869
1870   return text_view->pixels_above_lines;
1871 }
1872
1873 void
1874 gtk_text_view_set_pixels_below_lines (GtkTextView *text_view,
1875                                       gint         pixels_below_lines)
1876 {
1877   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1878
1879   if (text_view->pixels_below_lines != pixels_below_lines)
1880     {
1881       text_view->pixels_below_lines = pixels_below_lines;
1882
1883       if (text_view->layout)
1884         {
1885           text_view->layout->default_style->pixels_below_lines = pixels_below_lines;
1886           gtk_text_layout_default_style_changed (text_view->layout);
1887         }
1888     }
1889
1890   g_object_notify (G_OBJECT (text_view), "pixels_below_lines");
1891 }
1892
1893 gint
1894 gtk_text_view_get_pixels_below_lines (GtkTextView *text_view)
1895 {
1896   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1897
1898   return text_view->pixels_below_lines;
1899 }
1900
1901 void
1902 gtk_text_view_set_pixels_inside_wrap (GtkTextView *text_view,
1903                                       gint         pixels_inside_wrap)
1904 {
1905   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1906
1907   if (text_view->pixels_inside_wrap != pixels_inside_wrap)
1908     {
1909       text_view->pixels_inside_wrap = pixels_inside_wrap;
1910
1911       if (text_view->layout)
1912         {
1913           text_view->layout->default_style->pixels_inside_wrap = pixels_inside_wrap;
1914           gtk_text_layout_default_style_changed (text_view->layout);
1915         }
1916     }
1917   g_object_notify (G_OBJECT (text_view), "pixels_inside_wrap");
1918 }
1919
1920 gint
1921 gtk_text_view_get_pixels_inside_wrap (GtkTextView *text_view)
1922 {
1923   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1924
1925   return text_view->pixels_inside_wrap;
1926 }
1927
1928 void
1929 gtk_text_view_set_justification (GtkTextView     *text_view,
1930                                  GtkJustification justify)
1931 {
1932   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1933
1934   if (text_view->justify != justify)
1935     {
1936       text_view->justify = justify;
1937
1938       if (text_view->layout)
1939         {
1940           text_view->layout->default_style->justification = justify;
1941           gtk_text_layout_default_style_changed (text_view->layout);
1942         }
1943     }
1944
1945   g_object_notify (G_OBJECT (text_view), "justification");
1946 }
1947
1948 GtkJustification
1949 gtk_text_view_get_justification (GtkTextView *text_view)
1950 {
1951   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_JUSTIFY_LEFT);
1952
1953   return text_view->justify;
1954 }
1955
1956 void
1957 gtk_text_view_set_left_margin (GtkTextView *text_view,
1958                                gint         left_margin)
1959 {
1960   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1961
1962   if (text_view->left_margin != left_margin)
1963     {
1964       text_view->left_margin = left_margin;
1965
1966       if (text_view->layout)
1967         {
1968           text_view->layout->default_style->left_margin = left_margin;
1969           gtk_text_layout_default_style_changed (text_view->layout);
1970         }
1971     }
1972
1973   g_object_notify (G_OBJECT (text_view), "left_margin");
1974 }
1975
1976 gint
1977 gtk_text_view_get_left_margin (GtkTextView *text_view)
1978 {
1979   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1980
1981   return text_view->left_margin;
1982 }
1983
1984 void
1985 gtk_text_view_set_right_margin (GtkTextView *text_view,
1986                                 gint         right_margin)
1987 {
1988   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1989
1990   if (text_view->right_margin != right_margin)
1991     {
1992       text_view->right_margin = right_margin;
1993
1994       if (text_view->layout)
1995         {
1996           text_view->layout->default_style->right_margin = right_margin;
1997           gtk_text_layout_default_style_changed (text_view->layout);
1998         }
1999     }
2000
2001   g_object_notify (G_OBJECT (text_view), "right_margin");
2002 }
2003
2004 gint
2005 gtk_text_view_get_right_margin (GtkTextView *text_view)
2006 {
2007   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2008
2009   return text_view->right_margin;
2010 }
2011
2012 void
2013 gtk_text_view_set_indent (GtkTextView *text_view,
2014                           gint         indent)
2015 {
2016   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2017
2018   if (text_view->indent != indent)
2019     {
2020       text_view->indent = indent;
2021
2022       if (text_view->layout)
2023         {
2024           text_view->layout->default_style->indent = indent;
2025           gtk_text_layout_default_style_changed (text_view->layout);
2026         }
2027     }
2028   g_object_notify (G_OBJECT (text_view), "indent");
2029 }
2030
2031 gint
2032 gtk_text_view_get_indent (GtkTextView *text_view)
2033 {
2034   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2035
2036   return text_view->indent;
2037 }
2038
2039 void
2040 gtk_text_view_set_tabs (GtkTextView   *text_view,
2041                         PangoTabArray *tabs)
2042 {
2043   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2044
2045   if (text_view->tabs)
2046     pango_tab_array_free (text_view->tabs);
2047
2048   text_view->tabs = tabs ? pango_tab_array_copy (tabs) : NULL;
2049
2050   if (text_view->layout)
2051     {
2052       /* some unkosher futzing in internal struct details... */
2053       if (text_view->layout->default_style->tabs)
2054         pango_tab_array_free (text_view->layout->default_style->tabs);
2055
2056       text_view->layout->default_style->tabs =
2057         text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
2058
2059       gtk_text_layout_default_style_changed (text_view->layout);
2060     }
2061
2062   g_object_notify (G_OBJECT (text_view), "tabs");
2063 }
2064
2065 PangoTabArray*
2066 gtk_text_view_get_tabs (GtkTextView *text_view)
2067 {
2068   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
2069
2070   return text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
2071 }
2072
2073 /**
2074  * gtk_text_view_set_cursor_visible:
2075  * @text_view: a #GtkTextView
2076  * @setting: whether to show the insertion cursor
2077  *
2078  * Toggles whether the insertion point is displayed. A buffer with no editable
2079  * text probably shouldn't have a visible cursor, so you may want to turn
2080  * the cursor off.
2081  **/
2082 void
2083 gtk_text_view_set_cursor_visible    (GtkTextView   *text_view,
2084                                      gboolean       setting)
2085 {
2086   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2087
2088   setting = (setting != FALSE);
2089
2090   if (text_view->cursor_visible != setting)
2091     {
2092       text_view->cursor_visible = setting;
2093
2094       if (GTK_WIDGET_HAS_FOCUS (text_view))
2095         {
2096           if (text_view->layout)
2097             {
2098               gtk_text_layout_set_cursor_visible (text_view->layout, setting);
2099               gtk_text_view_check_cursor_blink (text_view);
2100             }
2101         }
2102     }
2103
2104   g_object_notify (G_OBJECT (text_view), "cursor_visible");
2105 }
2106
2107 /**
2108  * gtk_text_view_get_cursor_visible:
2109  * @text_view: a #GtkTextView
2110  *
2111  * Find out whether the cursor is being displayed.
2112  *
2113  * Return value: whether the insertion mark is visible
2114  **/
2115 gboolean
2116 gtk_text_view_get_cursor_visible    (GtkTextView   *text_view)
2117 {
2118   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
2119
2120   return text_view->cursor_visible;
2121 }
2122
2123
2124 /**
2125  * gtk_text_view_place_cursor_onscreen:
2126  * @text_view: a #GtkTextView
2127  *
2128  * Moves the cursor to the currently visible region of the
2129  * buffer, it it isn't there already.
2130  *
2131  * Return value: TRUE if the cursor had to be moved.
2132  **/
2133 gboolean
2134 gtk_text_view_place_cursor_onscreen (GtkTextView *text_view)
2135 {
2136   GtkTextIter insert;
2137
2138   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
2139
2140   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
2141                                     gtk_text_buffer_get_mark (get_buffer (text_view),
2142                                                               "insert"));
2143
2144   if (clamp_iter_onscreen (text_view, &insert))
2145     {
2146       gtk_text_buffer_place_cursor (get_buffer (text_view), &insert);
2147       return TRUE;
2148     }
2149   else
2150     return FALSE;
2151 }
2152
2153 static void
2154 gtk_text_view_destroy (GtkObject *object)
2155 {
2156   GtkTextView *text_view;
2157   GtkTextLayout *layout;
2158
2159   text_view = GTK_TEXT_VIEW (object);
2160
2161   layout = text_view->layout;
2162
2163   gtk_text_view_destroy_layout (text_view);
2164   gtk_text_view_set_buffer (text_view, NULL);
2165
2166   (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
2167 }
2168
2169 static void
2170 gtk_text_view_finalize (GObject *object)
2171 {
2172   GtkTextView *text_view;
2173
2174   text_view = GTK_TEXT_VIEW (object);
2175
2176   g_return_if_fail (text_view->buffer == NULL);
2177
2178   gtk_text_view_destroy_layout (text_view);
2179   gtk_text_view_set_buffer (text_view, NULL);
2180
2181   if (text_view->pending_scroll)
2182     {
2183       free_pending_scroll (text_view->pending_scroll);
2184       text_view->pending_scroll = NULL;
2185     }
2186
2187   if (text_view->hadjustment)
2188     g_object_unref (G_OBJECT (text_view->hadjustment));
2189   if (text_view->vadjustment)
2190     g_object_unref (G_OBJECT (text_view->vadjustment));
2191
2192   text_window_free (text_view->text_window);
2193
2194   if (text_view->left_window)
2195     text_window_free (text_view->left_window);
2196
2197   if (text_view->top_window)
2198     text_window_free (text_view->top_window);
2199
2200   if (text_view->right_window)
2201     text_window_free (text_view->right_window);
2202
2203   if (text_view->bottom_window)
2204     text_window_free (text_view->bottom_window);
2205
2206   g_object_unref (G_OBJECT (text_view->im_context));
2207
2208   (* G_OBJECT_CLASS (parent_class)->finalize) (object);
2209 }
2210
2211 static void
2212 gtk_text_view_set_property (GObject         *object,
2213                             guint            prop_id,
2214                             const GValue    *value,
2215                             GParamSpec      *pspec)
2216 {
2217   GtkTextView *text_view;
2218
2219   text_view = GTK_TEXT_VIEW (object);
2220
2221   switch (prop_id)
2222     {
2223     case PROP_PIXELS_ABOVE_LINES:
2224       gtk_text_view_set_pixels_above_lines (text_view, g_value_get_int (value));
2225       break;
2226
2227     case PROP_PIXELS_BELOW_LINES:
2228       gtk_text_view_set_pixels_below_lines (text_view, g_value_get_int (value));
2229       break;
2230
2231     case PROP_PIXELS_INSIDE_WRAP:
2232       gtk_text_view_set_pixels_inside_wrap (text_view, g_value_get_int (value));
2233       break;
2234
2235     case PROP_EDITABLE:
2236       gtk_text_view_set_editable (text_view, g_value_get_boolean (value));
2237       break;
2238
2239     case PROP_WRAP_MODE:
2240       gtk_text_view_set_wrap_mode (text_view, g_value_get_enum (value));
2241       break;
2242
2243     case PROP_JUSTIFICATION:
2244       gtk_text_view_set_justification (text_view, g_value_get_enum (value));
2245       break;
2246
2247     case PROP_LEFT_MARGIN:
2248       gtk_text_view_set_left_margin (text_view, g_value_get_int (value));
2249       break;
2250
2251     case PROP_RIGHT_MARGIN:
2252       gtk_text_view_set_right_margin (text_view, g_value_get_int (value));
2253       break;
2254
2255     case PROP_INDENT:
2256       gtk_text_view_set_indent (text_view, g_value_get_int (value));
2257       break;
2258
2259     case PROP_TABS:
2260       gtk_text_view_set_tabs (text_view, g_value_get_object (value));
2261       break;
2262
2263     case PROP_CURSOR_VISIBLE:
2264       gtk_text_view_set_cursor_visible (text_view, g_value_get_boolean (value));
2265       break;
2266
2267     default:
2268       g_assert_not_reached ();
2269       break;
2270     }
2271 }
2272
2273 static void
2274 gtk_text_view_get_property (GObject         *object,
2275                             guint            prop_id,
2276                             GValue          *value,
2277                             GParamSpec      *pspec)
2278 {
2279   GtkTextView *text_view;
2280
2281   text_view = GTK_TEXT_VIEW (object);
2282
2283   switch (prop_id)
2284     {
2285     case PROP_PIXELS_ABOVE_LINES:
2286       g_value_set_int (value, text_view->pixels_above_lines);
2287       break;
2288
2289     case PROP_PIXELS_BELOW_LINES:
2290       g_value_set_int (value, text_view->pixels_below_lines);
2291       break;
2292
2293     case PROP_PIXELS_INSIDE_WRAP:
2294       g_value_set_int (value, text_view->pixels_inside_wrap);
2295       break;
2296
2297     case PROP_EDITABLE:
2298       g_value_set_boolean (value, text_view->editable);
2299       break;
2300
2301     case PROP_WRAP_MODE:
2302       g_value_set_enum (value, text_view->wrap_mode);
2303       break;
2304
2305     case PROP_JUSTIFICATION:
2306       g_value_set_enum (value, text_view->justify);
2307       break;
2308
2309     case PROP_LEFT_MARGIN:
2310       g_value_set_int (value, text_view->left_margin);
2311       break;
2312
2313     case PROP_RIGHT_MARGIN:
2314       g_value_set_int (value, text_view->right_margin);
2315       break;
2316
2317     case PROP_INDENT:
2318       g_value_set_int (value, text_view->indent);
2319       break;
2320
2321     case PROP_TABS:
2322       g_value_set_object (value, gtk_text_view_get_tabs (text_view));
2323       break;
2324
2325     case PROP_CURSOR_VISIBLE:
2326       g_value_set_boolean (value, text_view->cursor_visible);
2327       break;
2328
2329     default:
2330       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2331       break;
2332     }
2333 }
2334
2335 static void
2336 gtk_text_view_size_request (GtkWidget      *widget,
2337                             GtkRequisition *requisition)
2338 {
2339   GtkTextView *text_view;
2340   GSList *tmp_list;
2341   gint focus_edge_width;
2342   gboolean interior_focus;
2343
2344   text_view = GTK_TEXT_VIEW (widget);
2345
2346   gtk_widget_style_get (widget, "interior_focus", &interior_focus, NULL);
2347
2348   if (interior_focus)
2349     focus_edge_width = 0;
2350   else
2351     focus_edge_width = 1;
2352
2353   if (text_view->layout)
2354     {
2355       text_view->text_window->requisition.width = text_view->layout->width;
2356       text_view->text_window->requisition.height = text_view->layout->height;
2357     }
2358   else
2359     {
2360       text_view->text_window->requisition.width = 0;
2361       text_view->text_window->requisition.height = 0;
2362     }
2363
2364   requisition->width = text_view->text_window->requisition.width + focus_edge_width * 2;
2365   requisition->height = text_view->text_window->requisition.height + focus_edge_width * 2;
2366
2367   if (text_view->left_window)
2368     requisition->width += text_view->left_window->requisition.width;
2369
2370   if (text_view->right_window)
2371     requisition->width += text_view->right_window->requisition.width;
2372
2373   if (text_view->top_window)
2374     requisition->height += text_view->top_window->requisition.height;
2375
2376   if (text_view->bottom_window)
2377     requisition->height += text_view->bottom_window->requisition.height;
2378
2379   tmp_list = text_view->children;
2380   while (tmp_list != NULL)
2381     {
2382       GtkTextViewChild *child = tmp_list->data;
2383
2384       if (child->anchor)
2385         {
2386           GtkRequisition child_req;
2387           GtkRequisition old_req;
2388
2389           old_req = child->widget->requisition;
2390
2391           gtk_widget_size_request (child->widget, &child_req);
2392
2393           if (text_view->layout &&
2394               (old_req.width != child_req.width ||
2395                old_req.height != child_req.height))
2396             gtk_text_child_anchor_queue_resize (child->anchor,
2397                                                 text_view->layout);
2398         }
2399       else
2400         {
2401
2402         }
2403
2404       tmp_list = g_slist_next (tmp_list);
2405     }
2406 }
2407
2408 static void
2409 gtk_text_view_update_child_allocation (GtkTextView      *text_view,
2410                                        GtkTextViewChild *vc)
2411 {
2412   gint buffer_y;
2413   GtkTextIter iter;
2414   GtkAllocation allocation;
2415
2416   gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
2417                                             &iter,
2418                                             vc->anchor);
2419
2420   gtk_text_layout_get_line_yrange (text_view->layout, &iter,
2421                                    &buffer_y, NULL);
2422
2423   buffer_y += vc->from_top_of_line;
2424
2425   allocation.x = vc->from_left_of_buffer;
2426   allocation.y = buffer_y;
2427   allocation.width = vc->widget->requisition.width;
2428   allocation.height = vc->widget->requisition.height;
2429
2430   gtk_widget_size_allocate (vc->widget, &allocation);
2431 }
2432
2433 static void
2434 gtk_text_view_child_allocated (GtkTextLayout *layout,
2435                                GtkWidget     *child,
2436                                gint           x,
2437                                gint           y,
2438                                gpointer       data)
2439 {
2440   GtkTextViewChild *vc = NULL;
2441   GtkTextView *text_view = data;
2442
2443   /* x,y is the position of the child from the top of the line, and
2444    * from the left of the buffer. We have to translate that into text
2445    * window coordinates, then size_allocate the child.
2446    */
2447
2448   vc = g_object_get_data (G_OBJECT (child),
2449                             "gtk-text-view-child");
2450
2451   g_assert (vc != NULL);
2452
2453   g_print ("child allocated at %d,%d\n", x, y);
2454
2455   vc->from_left_of_buffer = x;
2456   vc->from_top_of_line = y;
2457
2458   gtk_text_view_update_child_allocation (text_view, vc);
2459 }
2460
2461 static void
2462 gtk_text_view_validate_children (GtkTextView *text_view)
2463 {
2464   GSList *tmp_list;
2465
2466   DV(g_print(G_STRLOC"\n"));
2467
2468   tmp_list = text_view->children;
2469   while (tmp_list != NULL)
2470     {
2471       GtkTextViewChild *child = tmp_list->data;
2472
2473       if (child->anchor)
2474         {
2475           /* We need to force-validate the regions containing
2476            * children.
2477            */
2478           GtkTextIter child_loc;
2479           gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
2480                                                     &child_loc,
2481                                                     child->anchor);
2482
2483           gtk_text_layout_validate_yrange (text_view->layout,
2484                                            &child_loc,
2485                                            0, 1);
2486         }
2487       else
2488         {
2489
2490         }
2491
2492       tmp_list = g_slist_next (tmp_list);
2493     }
2494 }
2495
2496 static void
2497 gtk_text_view_size_allocate (GtkWidget *widget,
2498                              GtkAllocation *allocation)
2499 {
2500   GtkTextView *text_view;
2501   GtkTextIter first_para;
2502   gint y;
2503   GtkAdjustment *vadj;
2504   gboolean yoffset_changed = FALSE;
2505   gint width, height;
2506   GdkRectangle text_rect;
2507   GdkRectangle left_rect;
2508   GdkRectangle right_rect;
2509   GdkRectangle top_rect;
2510   GdkRectangle bottom_rect;
2511   gint focus_edge_width;
2512   gboolean interior_focus;
2513
2514   text_view = GTK_TEXT_VIEW (widget);
2515
2516   DV(g_print(G_STRLOC"\n"));
2517
2518   widget->allocation = *allocation;
2519
2520   if (GTK_WIDGET_REALIZED (widget))
2521     {
2522       gdk_window_move_resize (widget->window,
2523                               allocation->x, allocation->y,
2524                               allocation->width, allocation->height);
2525     }
2526
2527   /* distribute width/height among child windows. Ensure all
2528    * windows get at least a 1x1 allocation.
2529    */
2530
2531   gtk_widget_style_get (widget, "interior_focus", &interior_focus, NULL);
2532
2533   if (interior_focus)
2534     focus_edge_width = 0;
2535   else
2536     focus_edge_width = 1;
2537
2538   width = allocation->width - focus_edge_width * 2;
2539
2540   if (text_view->left_window)
2541     left_rect.width = text_view->left_window->requisition.width;
2542   else
2543     left_rect.width = 1;
2544
2545   width -= left_rect.width;
2546
2547   if (text_view->right_window)
2548     right_rect.width = text_view->right_window->requisition.width;
2549   else
2550     right_rect.width = 1;
2551
2552   width -= right_rect.width;
2553
2554   text_rect.width = MAX (1, width);
2555
2556   top_rect.width = text_rect.width;
2557   bottom_rect.width = text_rect.width;
2558
2559
2560   height = allocation->height - focus_edge_width * 2;
2561
2562   if (text_view->top_window)
2563     top_rect.height = text_view->top_window->requisition.height;
2564   else
2565     top_rect.height = 1;
2566
2567   height -= top_rect.height;
2568
2569   if (text_view->bottom_window)
2570     bottom_rect.height = text_view->bottom_window->requisition.height;
2571   else
2572     bottom_rect.height = 1;
2573
2574   height -= bottom_rect.height;
2575
2576   text_rect.height = MAX (1, height);
2577
2578   left_rect.height = text_rect.height;
2579   right_rect.height = text_rect.height;
2580
2581   /* Origins */
2582   left_rect.x = focus_edge_width;
2583   top_rect.y = focus_edge_width;
2584
2585   text_rect.x = left_rect.x + left_rect.width;
2586   text_rect.y = top_rect.y + top_rect.height;
2587
2588   left_rect.y = text_rect.y;
2589   right_rect.y = text_rect.y;
2590
2591   top_rect.x = text_rect.x;
2592   bottom_rect.x = text_rect.x;
2593
2594   right_rect.x = text_rect.x + text_rect.width;
2595   bottom_rect.y = text_rect.y + text_rect.height;
2596
2597   text_window_size_allocate (text_view->text_window,
2598                              &text_rect);
2599
2600   if (text_view->left_window)
2601     text_window_size_allocate (text_view->left_window,
2602                                &left_rect);
2603
2604   if (text_view->right_window)
2605     text_window_size_allocate (text_view->right_window,
2606                                &right_rect);
2607
2608   if (text_view->top_window)
2609     text_window_size_allocate (text_view->top_window,
2610                                &top_rect);
2611
2612   if (text_view->bottom_window)
2613     text_window_size_allocate (text_view->bottom_window,
2614                                &bottom_rect);
2615
2616   gtk_text_view_update_layout_width (text_view);
2617
2618   /* This is because validating children ends up size allocating them. */
2619   gtk_text_view_validate_children (text_view);
2620
2621   /* Now adjust the value of the adjustment to keep the cursor at the
2622    * same place in the buffer
2623    */
2624   gtk_text_view_get_first_para_iter (text_view, &first_para);
2625   gtk_text_layout_get_line_yrange (text_view->layout, &first_para, &y, NULL);
2626
2627   y += text_view->first_para_pixels;
2628
2629   /* Ensure h/v adj exist */
2630   get_hadjustment (text_view);
2631   get_vadjustment (text_view);
2632
2633   vadj = text_view->vadjustment;
2634   if (y > vadj->upper - vadj->page_size)
2635     y = MAX (0, vadj->upper - vadj->page_size);
2636
2637   if (y != text_view->yoffset)
2638     {
2639       vadj->value = text_view->yoffset = y;
2640       yoffset_changed = TRUE;
2641     }
2642
2643   text_view->hadjustment->page_size = SCREEN_WIDTH (text_view);
2644   text_view->hadjustment->page_increment = SCREEN_WIDTH (text_view) / 2;
2645   text_view->hadjustment->lower = 0;
2646   text_view->hadjustment->upper = MAX (SCREEN_WIDTH (text_view),
2647                                        text_view->width);
2648   gtk_signal_emit_by_name (GTK_OBJECT (text_view->hadjustment), "changed");
2649
2650   text_view->vadjustment->page_size = SCREEN_HEIGHT (text_view);
2651   text_view->vadjustment->page_increment = SCREEN_HEIGHT (text_view) / 2;
2652   text_view->vadjustment->lower = 0;
2653   text_view->vadjustment->upper = MAX (SCREEN_HEIGHT (text_view),
2654                                        text_view->height);
2655   gtk_signal_emit_by_name (GTK_OBJECT (text_view->vadjustment), "changed");
2656
2657   if (yoffset_changed)
2658     gtk_adjustment_value_changed (vadj);
2659
2660   if (text_view->first_validate_idle != 0)
2661     {
2662       /* The GTK resize loop processes all the pending exposes right
2663        * after doing the resize stuff, so the idle sizer won't have a
2664        * chance to run. So we do the work here.
2665        */
2666
2667       g_source_remove (text_view->first_validate_idle);
2668       text_view->first_validate_idle = 0;
2669
2670       if (!gtk_text_view_flush_scroll (text_view))
2671         gtk_text_view_validate_onscreen (text_view);
2672     }
2673 }
2674
2675 static void
2676 gtk_text_view_get_first_para_iter (GtkTextView *text_view,
2677                                    GtkTextIter *iter)
2678 {
2679   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), iter,
2680                                     text_view->first_para_mark);
2681 }
2682
2683 static void
2684 gtk_text_view_validate_onscreen (GtkTextView *text_view)
2685 {
2686   GtkWidget *widget = GTK_WIDGET (text_view);
2687
2688   DV(g_print(">Validating onscreen ("G_STRLOC")\n"));
2689
2690   if (SCREEN_HEIGHT (widget) > 0)
2691     {
2692       GtkTextIter first_para;
2693
2694       /* Be sure we've validated the stuff onscreen; if we
2695        * scrolled, these calls won't have any effect, because
2696        * they were called in the recursive validate_onscreen
2697        */
2698       gtk_text_view_get_first_para_iter (text_view, &first_para);
2699
2700       gtk_text_layout_validate_yrange (text_view->layout,
2701                                        &first_para,
2702                                        0,
2703                                        text_view->first_para_pixels +
2704                                        SCREEN_HEIGHT (widget));
2705     }
2706
2707   text_view->onscreen_validated = TRUE;
2708
2709   DV(g_print(">Done validating onscreen, onscreen_validated = TRUE ("G_STRLOC")\n"));
2710
2711   /* This can have the odd side effect of triggering a scroll, which should
2712    * flip "onscreen_validated" back to FALSE, but should also get us
2713    * back into this function to turn it on again.
2714    */
2715   gtk_text_view_update_adjustments (text_view);
2716
2717   g_assert (text_view->onscreen_validated);
2718 }
2719
2720 static gboolean
2721 first_validate_callback (gpointer data)
2722 {
2723   GtkTextView *text_view = data;
2724
2725   GDK_THREADS_ENTER ();
2726
2727   /* Note that some of this code is duplicated at the end of size_allocate,
2728    * keep in sync with that.
2729    */
2730
2731   DV(g_print(G_STRLOC"\n"));
2732
2733   /* Do this first, which means that if an "invalidate"
2734    * occurs during any of this process, a new first_validate_callback
2735    * will be installed, and we'll start again.
2736    */
2737   text_view->first_validate_idle = 0;
2738
2739   /* be sure we have up-to-date screen size set on the
2740    * layout.
2741    */
2742   gtk_text_view_update_layout_width (text_view);
2743
2744   /* Bail out if we invalidated stuff; scrolling right away will just
2745    * confuse the issue.
2746    */
2747   if (text_view->first_validate_idle != 0)
2748     {
2749       DV(g_print(">Width change forced requeue ("G_STRLOC")\n"));
2750     }
2751   else
2752     {
2753       /* scroll to any marks, if that's pending. This can
2754        * jump us to the validation codepath used for scrolling
2755        * onscreen, if so we bail out.
2756        */
2757       if (!gtk_text_view_flush_scroll (text_view))
2758         gtk_text_view_validate_onscreen (text_view);
2759
2760       DV(g_print(">Leaving first validate idle ("G_STRLOC")\n"));
2761
2762       g_assert (text_view->onscreen_validated);
2763
2764     }
2765
2766   GDK_THREADS_LEAVE ();
2767
2768   return FALSE;
2769 }
2770
2771 static gboolean
2772 incremental_validate_callback (gpointer data)
2773 {
2774   GtkTextView *text_view = data;
2775   gboolean result = TRUE;
2776
2777   GDK_THREADS_ENTER ();
2778
2779   DV(g_print(G_STRLOC"\n"));
2780
2781   gtk_text_layout_validate (text_view->layout, 2000);
2782
2783   gtk_text_view_update_adjustments (text_view);
2784
2785   if (gtk_text_layout_is_valid (text_view->layout))
2786     {
2787       text_view->incremental_validate_idle = 0;
2788       result = FALSE;
2789     }
2790
2791   GDK_THREADS_LEAVE ();
2792
2793   return result;
2794 }
2795
2796 static void
2797 invalidated_handler (GtkTextLayout *layout,
2798                      gpointer       data)
2799 {
2800   GtkTextView *text_view;
2801
2802   text_view = GTK_TEXT_VIEW (data);
2803
2804   text_view->onscreen_validated = FALSE;
2805
2806   DV(g_print(">Invalidate, onscreen_validated = FALSE ("G_STRLOC")\n"));
2807
2808   if (!text_view->first_validate_idle)
2809     {
2810       text_view->first_validate_idle = g_idle_add_full (GTK_PRIORITY_RESIZE - 2, first_validate_callback, text_view, NULL);
2811       DV (g_print (G_STRLOC": adding first validate idle %d\n",
2812                    text_view->first_validate_idle));
2813     }
2814
2815   if (!text_view->incremental_validate_idle)
2816     {
2817       text_view->incremental_validate_idle = g_idle_add_full (GTK_TEXT_VIEW_PRIORITY_VALIDATE, incremental_validate_callback, text_view, NULL);
2818       DV (g_print (G_STRLOC": adding incremental validate idle %d\n",
2819                    text_view->incremental_validate_idle));
2820     }
2821 }
2822
2823 static void
2824 changed_handler (GtkTextLayout *layout,
2825                  gint           start_y,
2826                  gint           old_height,
2827                  gint           new_height,
2828                  gpointer       data)
2829 {
2830   GtkTextView *text_view;
2831   GtkWidget *widget;
2832   GdkRectangle visible_rect;
2833   GdkRectangle redraw_rect;
2834
2835   text_view = GTK_TEXT_VIEW (data);
2836   widget = GTK_WIDGET (data);
2837
2838   DV(g_print(">Lines Validated ("G_STRLOC")\n"));
2839
2840   if (GTK_WIDGET_REALIZED (text_view))
2841     {
2842       gtk_text_view_get_visible_rect (text_view, &visible_rect);
2843
2844       redraw_rect.x = visible_rect.x;
2845       redraw_rect.width = visible_rect.width;
2846       redraw_rect.y = start_y;
2847
2848       if (old_height == new_height)
2849         redraw_rect.height = old_height;
2850       else
2851         redraw_rect.height = MAX (0, visible_rect.y + visible_rect.height - start_y);
2852
2853       if (gdk_rectangle_intersect (&redraw_rect, &visible_rect, &redraw_rect))
2854         {
2855           /* text_window_invalidate_rect() takes buffer coordinates */
2856           text_window_invalidate_rect (text_view->text_window,
2857                                        &redraw_rect);
2858
2859           DV(g_print(" invalidated rect: %d,%d %d x %d\n",
2860                      redraw_rect.x,
2861                      redraw_rect.y,
2862                      redraw_rect.width,
2863                      redraw_rect.height));
2864
2865           if (text_view->left_window)
2866             text_window_invalidate_rect (text_view->left_window,
2867                                          &redraw_rect);
2868           if (text_view->right_window)
2869             text_window_invalidate_rect (text_view->right_window,
2870                                          &redraw_rect);
2871           if (text_view->top_window)
2872             text_window_invalidate_rect (text_view->top_window,
2873                                          &redraw_rect);
2874           if (text_view->bottom_window)
2875             text_window_invalidate_rect (text_view->bottom_window,
2876                                          &redraw_rect);
2877         }
2878     }
2879
2880   if (old_height != new_height)
2881     {
2882       gboolean yoffset_changed = FALSE;
2883       GSList *tmp_list;
2884
2885       if (start_y + old_height <= text_view->yoffset - text_view->first_para_pixels)
2886         {
2887           text_view->yoffset += new_height - old_height;
2888           get_vadjustment (text_view)->value = text_view->yoffset;
2889           yoffset_changed = TRUE;
2890         }
2891
2892       if (yoffset_changed)
2893         gtk_adjustment_value_changed (get_vadjustment (text_view));
2894
2895       /* FIXME be smarter about which anchored widgets we update */
2896
2897       tmp_list = text_view->children;
2898       while (tmp_list != NULL)
2899         {
2900           GtkTextViewChild *child = tmp_list->data;
2901
2902           if (child->anchor)
2903             gtk_text_view_update_child_allocation (text_view, child);
2904
2905           tmp_list = g_slist_next (tmp_list);
2906         }
2907     }
2908 }
2909
2910 static void
2911 gtk_text_view_realize_cursor_gc (GtkTextView *text_view)
2912 {
2913   GdkColor *cursor_color;
2914   GdkColor red = { 0, 0xffff, 0x0000, 0x0000 };
2915
2916   if (text_view->cursor_gc)
2917     gdk_gc_unref (text_view->cursor_gc);
2918
2919   gtk_widget_style_get (GTK_WIDGET (text_view), "cursor_color", &cursor_color, NULL);
2920
2921   if (!cursor_color)
2922     cursor_color = &red;
2923
2924   text_view->cursor_gc = gdk_gc_new (text_view->text_window->bin_window);
2925   gdk_gc_set_rgb_fg_color (text_view->cursor_gc, cursor_color);
2926 }
2927
2928 static void
2929 gtk_text_view_realize (GtkWidget *widget)
2930 {
2931   GtkTextView *text_view;
2932   GdkWindowAttr attributes;
2933   gint attributes_mask;
2934
2935   text_view = GTK_TEXT_VIEW (widget);
2936   GTK_WIDGET_SET_FLAGS (text_view, GTK_REALIZED);
2937
2938   attributes.window_type = GDK_WINDOW_CHILD;
2939   attributes.x = widget->allocation.x;
2940   attributes.y = widget->allocation.y;
2941   attributes.width = widget->allocation.width;
2942   attributes.height = widget->allocation.height;
2943   attributes.wclass = GDK_INPUT_OUTPUT;
2944   attributes.visual = gtk_widget_get_visual (widget);
2945   attributes.colormap = gtk_widget_get_colormap (widget);
2946   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK | GDK_EXPOSURE_MASK;
2947
2948   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
2949
2950   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
2951                                    &attributes, attributes_mask);
2952   gdk_window_set_user_data (widget->window, widget);
2953
2954   /* must come before text_window_realize calls */
2955   widget->style = gtk_style_attach (widget->style, widget->window);
2956
2957   gdk_window_set_background (widget->window,
2958                              &widget->style->bg[GTK_WIDGET_STATE (widget)]);
2959
2960   text_window_realize (text_view->text_window, widget->window);
2961
2962   if (text_view->left_window)
2963     text_window_realize (text_view->left_window,
2964                          widget->window);
2965
2966   if (text_view->top_window)
2967     text_window_realize (text_view->top_window,
2968                          widget->window);
2969
2970   if (text_view->right_window)
2971     text_window_realize (text_view->right_window,
2972                          widget->window);
2973
2974   if (text_view->bottom_window)
2975     text_window_realize (text_view->bottom_window,
2976                          widget->window);
2977
2978   gtk_text_view_realize_cursor_gc (text_view);
2979
2980   gtk_text_view_ensure_layout (text_view);
2981
2982   if (text_view->buffer)
2983     gtk_text_buffer_add_selection_clipboard (text_view->buffer,
2984                                              gtk_clipboard_get (GDK_SELECTION_PRIMARY));
2985 }
2986
2987 static void
2988 gtk_text_view_unrealize (GtkWidget *widget)
2989 {
2990   GtkTextView *text_view;
2991
2992   text_view = GTK_TEXT_VIEW (widget);
2993
2994   if (text_view->buffer)
2995     gtk_text_buffer_remove_selection_clipboard (text_view->buffer,
2996                                                 gtk_clipboard_get (GDK_SELECTION_PRIMARY));
2997
2998   if (text_view->cursor_gc)
2999     {
3000       gdk_gc_unref (text_view->cursor_gc);
3001       text_view->cursor_gc = NULL;
3002     }
3003
3004   if (text_view->first_validate_idle)
3005     {
3006       g_source_remove (text_view->first_validate_idle);
3007       text_view->first_validate_idle = 0;
3008     }
3009
3010   if (text_view->incremental_validate_idle)
3011     {
3012       g_source_remove (text_view->incremental_validate_idle);
3013       text_view->incremental_validate_idle = 0;
3014     }
3015
3016   if (text_view->popup_menu)
3017     {
3018       gtk_widget_destroy (text_view->popup_menu);
3019       text_view->popup_menu = NULL;
3020     }
3021
3022   text_window_unrealize (text_view->text_window);
3023
3024   if (text_view->left_window)
3025     text_window_unrealize (text_view->left_window);
3026
3027   if (text_view->top_window)
3028     text_window_unrealize (text_view->top_window);
3029
3030   if (text_view->right_window)
3031     text_window_unrealize (text_view->right_window);
3032
3033   if (text_view->bottom_window)
3034     text_window_unrealize (text_view->bottom_window);
3035
3036   gtk_text_view_destroy_layout (text_view);
3037
3038   (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
3039 }
3040
3041 static void
3042 gtk_text_view_style_set (GtkWidget *widget,
3043                          GtkStyle  *previous_style)
3044 {
3045   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3046
3047   if (GTK_WIDGET_REALIZED (widget))
3048     {
3049       gdk_window_set_background (widget->window,
3050                                  &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3051
3052       gdk_window_set_background (text_view->text_window->bin_window,
3053                                  &widget->style->base[GTK_WIDGET_STATE (widget)]);
3054
3055       if (text_view->left_window)
3056         gdk_window_set_background (text_view->left_window->bin_window,
3057                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3058       if (text_view->right_window)
3059         gdk_window_set_background (text_view->right_window->bin_window,
3060                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3061
3062       if (text_view->top_window)
3063         gdk_window_set_background (text_view->top_window->bin_window,
3064                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3065
3066       if (text_view->bottom_window)
3067         gdk_window_set_background (text_view->bottom_window->bin_window,
3068                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3069
3070       gtk_text_view_realize_cursor_gc (text_view);
3071     }
3072
3073   if (text_view->layout && previous_style)
3074     {
3075       gtk_text_view_set_attributes_from_style (text_view,
3076                                                text_view->layout->default_style,
3077                                                widget->style);
3078       gtk_text_layout_default_style_changed (text_view->layout);
3079     }
3080 }
3081
3082 static void
3083 gtk_text_view_direction_changed (GtkWidget        *widget,
3084                                  GtkTextDirection  previous_direction)
3085 {
3086   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3087
3088   if (text_view->layout)
3089     {
3090       text_view->layout->default_style->direction = gtk_widget_get_direction (widget);
3091       gtk_text_layout_default_style_changed (text_view->layout);
3092     }
3093 }
3094
3095 /*
3096  * Events
3097  */
3098
3099 static gboolean
3100 get_event_coordinates (GdkEvent *event, gint *x, gint *y)
3101 {
3102   if (event)
3103     switch (event->type)
3104       {
3105       case GDK_MOTION_NOTIFY:
3106         *x = event->motion.x;
3107         *y = event->motion.y;
3108         return TRUE;
3109         break;
3110
3111       case GDK_BUTTON_PRESS:
3112       case GDK_2BUTTON_PRESS:
3113       case GDK_3BUTTON_PRESS:
3114       case GDK_BUTTON_RELEASE:
3115         *x = event->button.x;
3116         *y = event->button.y;
3117         return TRUE;
3118         break;
3119
3120       case GDK_KEY_PRESS:
3121       case GDK_KEY_RELEASE:
3122       case GDK_ENTER_NOTIFY:
3123       case GDK_LEAVE_NOTIFY:
3124       case GDK_PROPERTY_NOTIFY:
3125       case GDK_SELECTION_CLEAR:
3126       case GDK_SELECTION_REQUEST:
3127       case GDK_SELECTION_NOTIFY:
3128       case GDK_PROXIMITY_IN:
3129       case GDK_PROXIMITY_OUT:
3130       case GDK_DRAG_ENTER:
3131       case GDK_DRAG_LEAVE:
3132       case GDK_DRAG_MOTION:
3133       case GDK_DRAG_STATUS:
3134       case GDK_DROP_START:
3135       case GDK_DROP_FINISHED:
3136       default:
3137         return FALSE;
3138         break;
3139       }
3140
3141   return FALSE;
3142 }
3143
3144 static gint
3145 emit_event_on_tags (GtkWidget   *widget,
3146                     GdkEvent    *event,
3147                     GtkTextIter *iter)
3148 {
3149   GSList *tags;
3150   GSList *tmp;
3151   gboolean retval = FALSE;
3152   GtkTextView *text_view;
3153
3154   text_view = GTK_TEXT_VIEW (widget);
3155
3156   tags = gtk_text_iter_get_tags (iter);
3157
3158   tmp = tags;
3159   while (tmp != NULL)
3160     {
3161       GtkTextTag *tag = tmp->data;
3162
3163       if (gtk_text_tag_event (tag, G_OBJECT (widget), event, iter))
3164         {
3165           retval = TRUE;
3166           break;
3167         }
3168
3169       tmp = g_slist_next (tmp);
3170     }
3171
3172   g_slist_free (tags);
3173
3174   return retval;
3175 }
3176
3177 static gint
3178 gtk_text_view_event (GtkWidget *widget, GdkEvent *event)
3179 {
3180   GtkTextView *text_view;
3181   gint x = 0, y = 0;
3182
3183   text_view = GTK_TEXT_VIEW (widget);
3184
3185   if (text_view->layout == NULL ||
3186       get_buffer (text_view) == NULL)
3187     return FALSE;
3188
3189   if (event->any.window != text_view->text_window->bin_window)
3190     return FALSE;
3191
3192   if (get_event_coordinates (event, &x, &y))
3193     {
3194       GtkTextIter iter;
3195
3196       x += text_view->xoffset;
3197       y += text_view->yoffset;
3198
3199       /* FIXME this is slow and we do it twice per event.
3200        * My favorite solution is to have GtkTextLayout cache
3201        * the last couple lookups.
3202        */
3203       gtk_text_layout_get_iter_at_pixel (text_view->layout,
3204                                          &iter,
3205                                          x, y);
3206
3207       return emit_event_on_tags (widget, event, &iter);
3208     }
3209   else if (event->type == GDK_KEY_PRESS ||
3210            event->type == GDK_KEY_RELEASE)
3211     {
3212       GtkTextMark *insert;
3213       GtkTextIter iter;
3214
3215       insert = gtk_text_buffer_get_mark (get_buffer (text_view),
3216                                          "insert");
3217
3218       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
3219
3220       return emit_event_on_tags (widget, event, &iter);
3221     }
3222   else
3223     return FALSE;
3224 }
3225
3226 static gint
3227 gtk_text_view_key_press_event (GtkWidget *widget, GdkEventKey *event)
3228 {
3229   gboolean retval = FALSE;
3230   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3231   GtkTextMark *insert;
3232   GtkTextIter iter;
3233
3234   if (text_view->layout == NULL ||
3235       get_buffer (text_view) == NULL)
3236     return FALSE;
3237
3238   insert = gtk_text_buffer_get_insert (get_buffer (text_view));
3239   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
3240   if (gtk_text_iter_can_insert (&iter, text_view->editable) &&
3241       gtk_im_context_filter_keypress (text_view->im_context, event))
3242     {
3243       text_view->need_im_reset = TRUE;
3244       retval = TRUE;
3245     }
3246   else if (GTK_WIDGET_CLASS (parent_class)->key_press_event &&
3247            GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, event))
3248     retval = TRUE;
3249   else if (event->keyval == GDK_Return ||
3250            event->keyval == GDK_KP_Enter)
3251     {
3252       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\n", 1,
3253                                                     text_view->editable);
3254       DV(g_print (G_STRLOC": scrolling to mark\n"));
3255       gtk_text_view_scroll_to_mark (text_view,
3256                                     gtk_text_buffer_get_mark (get_buffer (text_view),
3257                                                               "insert"),
3258                                     0.0, FALSE, 0.0, 0.0);
3259       retval = TRUE;
3260     }
3261   /* Pass through Tab as literal tab, unless Control is held down */
3262   else if ((event->keyval == GDK_Tab ||
3263             event->keyval == GDK_KP_Tab ||
3264             event->keyval == GDK_ISO_Left_Tab) &&
3265            !(event->state & GDK_CONTROL_MASK))
3266     {
3267       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\t", 1,
3268                                                     text_view->editable);
3269       DV(g_print (G_STRLOC": scrolling onscreen\n"));
3270       gtk_text_view_scroll_mark_onscreen (text_view,
3271                                           gtk_text_buffer_get_mark (get_buffer (text_view),
3272                                                                     "insert"));
3273       retval = TRUE;
3274     }
3275   else
3276     retval = FALSE;
3277
3278   gtk_text_view_pend_cursor_blink (text_view);
3279
3280   return retval;
3281 }
3282
3283 static gint
3284 gtk_text_view_key_release_event (GtkWidget *widget, GdkEventKey *event)
3285 {
3286   return FALSE;
3287 }
3288
3289 static gint
3290 gtk_text_view_button_press_event (GtkWidget *widget, GdkEventButton *event)
3291 {
3292   GtkTextView *text_view;
3293
3294   text_view = GTK_TEXT_VIEW (widget);
3295
3296   text_view->disable_scroll_on_focus = TRUE;
3297   gtk_widget_grab_focus (widget);
3298   text_view->disable_scroll_on_focus = FALSE;
3299
3300   if (event->window != text_view->text_window->bin_window)
3301     {
3302       /* Remove selection if any. */
3303       gtk_text_view_unselect (text_view);
3304       return FALSE;
3305     }
3306
3307 #if 0
3308   /* debug hack */
3309   if (event->button == 3 && (event->state & GDK_CONTROL_MASK) != 0)
3310     _gtk_text_buffer_spew (GTK_TEXT_VIEW (widget)->buffer);
3311   else if (event->button == 3)
3312     gtk_text_layout_spew (GTK_TEXT_VIEW (widget)->layout);
3313 #endif
3314
3315   if (event->type == GDK_BUTTON_PRESS)
3316     {
3317       gtk_text_view_reset_im_context (text_view);
3318
3319       if (event->button == 1)
3320         {
3321           /* If we're in the selection, start a drag copy/move of the
3322            * selection; otherwise, start creating a new selection.
3323            */
3324           GtkTextIter iter;
3325           GtkTextIter start, end;
3326
3327           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3328                                              &iter,
3329                                              event->x + text_view->xoffset,
3330                                              event->y + text_view->yoffset);
3331
3332           if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
3333                                                     &start, &end) &&
3334               gtk_text_iter_in_range (&iter, &start, &end))
3335             {
3336               text_view->drag_start_x = event->x;
3337               text_view->drag_start_y = event->y;
3338               text_view->pending_place_cursor_button = event->button;
3339             }
3340           else
3341             {
3342               gtk_text_view_start_selection_drag (text_view, &iter, event);
3343             }
3344
3345           return TRUE;
3346         }
3347       else if (event->button == 2)
3348         {
3349           GtkTextIter iter;
3350
3351           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3352                                              &iter,
3353                                              event->x + text_view->xoffset,
3354                                              event->y + text_view->yoffset);
3355
3356           gtk_text_buffer_paste_clipboard (get_buffer (text_view),
3357                                            gtk_clipboard_get (GDK_SELECTION_PRIMARY),
3358                                            &iter,
3359                                            text_view->editable);
3360           return TRUE;
3361         }
3362       else if (event->button == 3)
3363         {
3364           gtk_text_view_do_popup (text_view, event);
3365         }
3366     }
3367   else if ((event->type == GDK_2BUTTON_PRESS ||
3368             event->type == GDK_3BUTTON_PRESS) &&
3369            event->button == 1)
3370     {
3371       GtkTextIter start, end;
3372
3373       /* End the selection drag, otherwise we'd clear the new
3374        * word/line selection on button release
3375        */
3376       gtk_text_view_end_selection_drag (text_view, event);
3377
3378       gtk_text_layout_get_iter_at_pixel (text_view->layout,
3379                                          &start,
3380                                          event->x + text_view->xoffset,
3381                                          event->y + text_view->yoffset);
3382
3383       end = start;
3384
3385       if (event->type == GDK_2BUTTON_PRESS)
3386         {
3387           if (gtk_text_iter_inside_word (&start))
3388             {
3389               if (!gtk_text_iter_starts_word (&start))
3390                 gtk_text_iter_backward_word_start (&start);
3391
3392               if (!gtk_text_iter_ends_word (&end))
3393                 gtk_text_iter_forward_word_end (&end);
3394             }
3395         }
3396       else if (event->type == GDK_3BUTTON_PRESS)
3397         {
3398           if (gtk_text_view_starts_display_line (text_view, &start))
3399             {
3400               /* If on a display line boundary, we assume the user
3401                * clicked off the end of a line and we therefore select
3402                * the line before the boundary.
3403                */
3404               gtk_text_view_backward_display_line_start (text_view, &start);
3405             }
3406           else
3407             {
3408               /* start isn't on the start of a line, so we move it to the
3409                * start, and move end to the end unless it's already there.
3410                */
3411               gtk_text_view_backward_display_line_start (text_view, &start);
3412
3413               if (!gtk_text_view_starts_display_line (text_view, &end))
3414                 gtk_text_view_forward_display_line_end (text_view, &end);
3415             }
3416         }
3417
3418       gtk_text_buffer_move_mark (get_buffer (text_view),
3419                                  gtk_text_buffer_get_selection_bound (get_buffer (text_view)),
3420                                  &start);
3421       gtk_text_buffer_move_mark (get_buffer (text_view),
3422                                  gtk_text_buffer_get_insert (get_buffer (text_view)),
3423                                  &end);
3424
3425       text_view->just_selected_element = TRUE;
3426
3427       return TRUE;
3428     }
3429
3430   return FALSE;
3431 }
3432
3433 static gint
3434 gtk_text_view_button_release_event (GtkWidget *widget, GdkEventButton *event)
3435 {
3436   GtkTextView *text_view;
3437
3438   text_view = GTK_TEXT_VIEW (widget);
3439
3440   if (event->window != text_view->text_window->bin_window)
3441     return FALSE;
3442
3443   if (event->button == 1)
3444     {
3445       if (text_view->drag_start_x >= 0)
3446         {
3447           text_view->drag_start_x = -1;
3448           text_view->drag_start_y = -1;
3449         }
3450
3451       if (gtk_text_view_end_selection_drag (GTK_TEXT_VIEW (widget), event))
3452         return TRUE;
3453       else if (text_view->just_selected_element)
3454         {
3455           text_view->just_selected_element = FALSE;
3456           return FALSE;
3457         }
3458       else if (text_view->pending_place_cursor_button == event->button)
3459         {
3460           GtkTextIter iter;
3461
3462           /* Unselect everything; we clicked inside selection, but
3463            * didn't move by the drag threshold, so just clear selection
3464            * and place cursor.
3465            */
3466           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3467                                              &iter,
3468                                              event->x + text_view->xoffset,
3469                                              event->y + text_view->yoffset);
3470
3471           gtk_text_buffer_place_cursor (get_buffer (text_view), &iter);
3472
3473           text_view->pending_place_cursor_button = 0;
3474
3475           return FALSE;
3476         }
3477     }
3478
3479   return FALSE;
3480 }
3481
3482 static void
3483 keymap_direction_changed (GdkKeymap   *keymap,
3484                           GtkTextView *text_view)
3485 {
3486   gtk_text_view_check_keymap_direction (text_view);
3487 }
3488
3489 static gint
3490 gtk_text_view_focus_in_event (GtkWidget *widget, GdkEventFocus *event)
3491 {
3492   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3493
3494   GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3495   gtk_widget_queue_draw (widget);
3496
3497   DV(g_print (G_STRLOC": focus_in_event\n"));
3498
3499   if (text_view->cursor_visible && text_view->layout)
3500     {
3501       gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3502       gtk_text_view_check_cursor_blink (text_view);
3503     }
3504
3505   g_signal_connect (gdk_keymap_get_default (),
3506                     "direction_changed",
3507                     G_CALLBACK (keymap_direction_changed), text_view);
3508   gtk_text_view_check_keymap_direction (text_view);
3509
3510   text_view->need_im_reset = TRUE;
3511   gtk_im_context_focus_in (GTK_TEXT_VIEW (widget)->im_context);
3512
3513   return FALSE;
3514 }
3515
3516 static gint
3517 gtk_text_view_focus_out_event (GtkWidget *widget, GdkEventFocus *event)
3518 {
3519   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3520
3521   GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3522   gtk_widget_queue_draw (widget);
3523
3524   DV(g_print (G_STRLOC": focus_out_event\n"));
3525
3526   if (text_view->cursor_visible && text_view->layout)
3527     {
3528       gtk_text_layout_set_cursor_visible (text_view->layout, FALSE);
3529       gtk_text_view_check_cursor_blink (text_view);
3530     }
3531
3532   g_signal_handlers_disconnect_by_func (gdk_keymap_get_default (),
3533                                         keymap_direction_changed,
3534                                         text_view);
3535
3536   text_view->need_im_reset = TRUE;
3537   gtk_im_context_focus_out (GTK_TEXT_VIEW (widget)->im_context);
3538
3539   return FALSE;
3540 }
3541
3542 static gint
3543 gtk_text_view_motion_event (GtkWidget *widget, GdkEventMotion *event)
3544 {
3545   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3546
3547   if (event->window == text_view->text_window->bin_window &&
3548       text_view->drag_start_x >= 0)
3549     {
3550       gint x, y;
3551
3552       gdk_window_get_pointer (text_view->text_window->bin_window,
3553                               &x, &y, NULL);
3554
3555       if (gtk_drag_check_threshold (widget,
3556                                     text_view->drag_start_x,
3557                                     text_view->drag_start_y,
3558                                     x, y))
3559         {
3560           GtkTextIter iter;
3561           gint buffer_x, buffer_y;
3562
3563           gtk_text_view_window_to_buffer_coords (text_view,
3564                                                  GTK_TEXT_WINDOW_TEXT,
3565                                                  text_view->drag_start_x,
3566                                                  text_view->drag_start_y,
3567                                                  &buffer_x,
3568                                                  &buffer_y);
3569
3570           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3571                                              &iter,
3572                                              buffer_x, buffer_y);
3573
3574           gtk_text_view_start_selection_dnd (text_view, &iter, event);
3575           return TRUE;
3576         }
3577     }
3578
3579   return FALSE;
3580 }
3581
3582 static void
3583 gtk_text_view_paint (GtkWidget *widget, GdkRectangle *area)
3584 {
3585   GtkTextView *text_view;
3586
3587   text_view = GTK_TEXT_VIEW (widget);
3588
3589   g_return_if_fail (text_view->layout != NULL);
3590   g_return_if_fail (text_view->xoffset >= 0);
3591   g_return_if_fail (text_view->yoffset >= 0);
3592
3593   DV (g_print (G_STRLOC": first_validate_idle: %d\n",
3594                text_view->first_validate_idle));
3595
3596   if (!text_view->onscreen_validated)
3597     {
3598       G_BREAKPOINT ();
3599       g_warning (G_STRLOC ": somehow some text lines were modified or scrolling occurred since the last validation of lines on the screen");
3600     }
3601
3602 #if 0
3603   printf ("painting %d,%d  %d x %d\n",
3604           area->x, area->y,
3605           area->width, area->height);
3606 #endif
3607
3608   gtk_text_layout_draw (text_view->layout,
3609                         widget,
3610                         text_view->text_window->bin_window,
3611                         text_view->cursor_gc,
3612                         text_view->xoffset,
3613                         text_view->yoffset,
3614                         area->x, area->y,
3615                         area->width, area->height);
3616 }
3617
3618 static gint
3619 gtk_text_view_expose_event (GtkWidget *widget, GdkEventExpose *event)
3620 {
3621 #if 0
3622   {
3623     GdkWindow *win = event->window;
3624     GdkColor color = { 0, 0, 0, 65535 };
3625     GdkGC *gc = gdk_gc_new (win);
3626     gdk_gc_set_rgb_fg_color (gc, &color);
3627     gdk_draw_rectangle (win,
3628                         gc, TRUE,
3629                         event->area.x, event->area.y,
3630                         event->area.width, event->area.height);
3631     gdk_gc_unref (gc);
3632   }
3633 #endif
3634
3635   if (event->window == gtk_text_view_get_window (GTK_TEXT_VIEW (widget),
3636                                                  GTK_TEXT_WINDOW_TEXT))
3637     {
3638       DV(g_print (">Exposed ("G_STRLOC")\n"));
3639       gtk_text_view_paint (widget, &event->area);
3640     }
3641
3642   if (event->window == widget->window)
3643     gtk_text_view_draw_focus (widget);
3644
3645   return TRUE;
3646 }
3647
3648 static void
3649 gtk_text_view_draw_focus (GtkWidget *widget)
3650 {
3651   gboolean interior_focus;
3652
3653   /* We clear the focus if we are in interior focus mode. */
3654   gtk_widget_style_get (widget, "interior_focus", &interior_focus, NULL);
3655
3656   if (GTK_WIDGET_DRAWABLE (widget))
3657     {
3658       if (GTK_WIDGET_HAS_FOCUS (widget) && !interior_focus)
3659         {
3660           gtk_paint_focus (widget->style, widget->window,
3661                            NULL, widget, "textview",
3662                            0, 0,
3663                            widget->allocation.width - 1,
3664                            widget->allocation.height - 1);
3665         }
3666       else
3667         {
3668           gdk_window_clear (widget->window);
3669         }
3670     }
3671 }
3672
3673 static void
3674 gtk_text_view_grab_focus (GtkWidget *widget)
3675 {
3676   GtkTextView *text_view;
3677
3678   text_view = GTK_TEXT_VIEW (widget);
3679
3680   GTK_WIDGET_CLASS (parent_class)->grab_focus (widget);
3681
3682   if (!text_view->disable_scroll_on_focus)
3683     gtk_text_view_scroll_mark_onscreen (text_view,
3684                                         gtk_text_buffer_get_mark (get_buffer (text_view),
3685                                                                   "insert"));
3686 }
3687
3688 /*
3689  * Container
3690  */
3691
3692 static void
3693 gtk_text_view_add (GtkContainer *container,
3694                    GtkWidget    *child)
3695 {
3696   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
3697   g_return_if_fail (GTK_IS_WIDGET (child));
3698
3699   /* This is pretty random. */
3700   gtk_text_view_add_child_in_window (GTK_TEXT_VIEW (container),
3701                                      child,
3702                                      GTK_TEXT_WINDOW_WIDGET,
3703                                      0, 0);
3704 }
3705
3706 static void
3707 gtk_text_view_remove (GtkContainer *container,
3708                       GtkWidget    *child)
3709 {
3710   GSList *iter;
3711   GtkTextView *text_view;
3712   GtkTextViewChild *vc;
3713
3714   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
3715   g_return_if_fail (GTK_IS_WIDGET (child));
3716   g_return_if_fail (child->parent == (GtkWidget*) container);
3717
3718   text_view = GTK_TEXT_VIEW (container);
3719
3720   vc = NULL;
3721   iter = text_view->children;
3722
3723   while (iter != NULL)
3724     {
3725       vc = iter->data;
3726
3727       if (vc->widget == child)
3728         break;
3729
3730       iter = g_slist_next (iter);
3731     }
3732
3733   g_assert (iter != NULL); /* be sure we had the child in the list */
3734
3735   text_view->children = g_slist_remove (text_view->children, vc);
3736
3737   gtk_widget_unparent (vc->widget);
3738
3739   text_view_child_free (vc);
3740 }
3741
3742 static void
3743 gtk_text_view_forall (GtkContainer *container,
3744                       gboolean      include_internals,
3745                       GtkCallback   callback,
3746                       gpointer      callback_data)
3747 {
3748   GSList *iter;
3749   GtkTextView *text_view;
3750
3751   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
3752   g_return_if_fail (callback != NULL);
3753
3754   text_view = GTK_TEXT_VIEW (container);
3755
3756   iter = text_view->children;
3757
3758   while (iter != NULL)
3759     {
3760       GtkTextViewChild *vc = iter->data;
3761
3762       (* callback) (vc->widget, callback_data);
3763
3764       iter = g_slist_next (iter);
3765     }
3766 }
3767
3768 #define CURSOR_ON_MULTIPLIER 0.66
3769 #define CURSOR_OFF_MULTIPLIER 0.34
3770 #define CURSOR_PEND_MULTIPLIER 1.0
3771
3772 static gboolean
3773 cursor_blinks (GtkTextView *text_view)
3774 {
3775   GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
3776   gboolean blink;
3777
3778 #ifdef DEBUG_VALIDATION_AND_SCROLLING
3779   return FALSE;
3780 #endif
3781   if (gtk_debug_flags & GTK_DEBUG_UPDATES)
3782     return FALSE;
3783
3784   g_object_get (G_OBJECT (settings), "gtk-cursor-blink", &blink, NULL);
3785   return blink;
3786 }
3787
3788 static gint
3789 get_cursor_time (GtkTextView *text_view)
3790 {
3791   GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
3792   gint time;
3793
3794   g_object_get (G_OBJECT (settings), "gtk-cursor-blink-time", &time, NULL);
3795
3796   return time;
3797 }
3798
3799 /*
3800  * Blink!
3801  */
3802
3803 static gint
3804 blink_cb (gpointer data)
3805 {
3806   GtkTextView *text_view;
3807   gboolean visible;
3808
3809   GDK_THREADS_ENTER ();
3810
3811   text_view = GTK_TEXT_VIEW (data);
3812
3813   g_assert (text_view->layout);
3814   g_assert (GTK_WIDGET_HAS_FOCUS (text_view));
3815   g_assert (text_view->cursor_visible);
3816
3817   visible = gtk_text_layout_get_cursor_visible (text_view->layout);
3818
3819   if (visible)
3820     text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_OFF_MULTIPLIER,
3821                                                 blink_cb,
3822                                                 text_view);
3823   else
3824     text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_ON_MULTIPLIER,
3825                                                 blink_cb,
3826                                                 text_view);
3827
3828   gtk_text_layout_set_cursor_visible (text_view->layout,
3829                                       !visible);
3830
3831   GDK_THREADS_LEAVE ();
3832
3833   /* Remove ourselves */
3834   return FALSE;
3835 }
3836
3837
3838 static void
3839 gtk_text_view_stop_cursor_blink (GtkTextView *text_view)
3840 {
3841   if (text_view->blink_timeout)
3842     {
3843       gtk_timeout_remove (text_view->blink_timeout);
3844       text_view->blink_timeout = 0;
3845     }
3846 }
3847
3848 static void
3849 gtk_text_view_check_cursor_blink (GtkTextView *text_view)
3850 {
3851   if (text_view->layout != NULL &&
3852       text_view->cursor_visible &&
3853       GTK_WIDGET_HAS_FOCUS (text_view))
3854     {
3855       if (cursor_blinks (text_view))
3856         {
3857           if (text_view->blink_timeout == 0)
3858             {
3859               gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3860
3861               text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_OFF_MULTIPLIER,
3862                                                           blink_cb,
3863                                                           text_view);
3864             }
3865         }
3866       else
3867         gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3868     }
3869   else
3870     {
3871       gtk_text_view_stop_cursor_blink (text_view);
3872     }
3873 }
3874
3875 static void
3876 gtk_text_view_pend_cursor_blink(GtkTextView *text_view)
3877 {
3878   if (text_view->layout != NULL &&
3879       text_view->cursor_visible &&
3880       GTK_WIDGET_HAS_FOCUS (text_view) &&
3881       cursor_blinks (text_view))
3882     {
3883       if (text_view->blink_timeout != 0)
3884         {
3885           gtk_timeout_remove (text_view->blink_timeout);
3886           text_view->blink_timeout = 0;
3887         }
3888
3889       gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3890
3891       text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_PEND_MULTIPLIER,
3892                                                   blink_cb,
3893                                                   text_view);
3894     }
3895 }
3896
3897
3898 /*
3899  * Key binding handlers
3900  */
3901
3902 static void
3903 gtk_text_view_move_iter_by_lines (GtkTextView *text_view,
3904                                   GtkTextIter *newplace,
3905                                   gint         count)
3906 {
3907   while (count < 0)
3908     {
3909       gtk_text_layout_move_iter_to_previous_line (text_view->layout, newplace);
3910       count++;
3911     }
3912
3913   while (count > 0)
3914     {
3915       gtk_text_layout_move_iter_to_next_line (text_view->layout, newplace);
3916       count--;
3917     }
3918 }
3919
3920 static void
3921 gtk_text_view_move_cursor (GtkTextView     *text_view,
3922                            GtkMovementStep  step,
3923                            gint             count,
3924                            gboolean         extend_selection)
3925 {
3926   GtkTextIter insert;
3927   GtkTextIter newplace;
3928
3929   gint cursor_x_pos = 0;
3930
3931   gtk_text_view_reset_im_context (text_view);
3932
3933   if (step == GTK_MOVEMENT_PAGES)
3934     {
3935       gtk_text_view_scroll_pages (text_view, count);
3936       gtk_text_view_pend_cursor_blink (text_view);
3937       return;
3938     }
3939
3940   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
3941                                     gtk_text_buffer_get_mark (get_buffer (text_view),
3942                                                               "insert"));
3943   newplace = insert;
3944
3945   if (step == GTK_MOVEMENT_DISPLAY_LINES)
3946     gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, NULL);
3947
3948   switch (step)
3949     {
3950     case GTK_MOVEMENT_LOGICAL_POSITIONS:
3951       gtk_text_iter_forward_cursor_positions (&newplace, count);
3952       break;
3953
3954     case GTK_MOVEMENT_VISUAL_POSITIONS:
3955       gtk_text_layout_move_iter_visually (text_view->layout,
3956                                           &newplace, count);
3957       break;
3958
3959     case GTK_MOVEMENT_WORDS:
3960       if (count < 0)
3961         gtk_text_iter_backward_word_starts (&newplace, -count);
3962       else if (count > 0)
3963         gtk_text_iter_forward_word_ends (&newplace, count);
3964       break;
3965
3966     case GTK_MOVEMENT_DISPLAY_LINES:
3967       gtk_text_view_move_iter_by_lines (text_view, &newplace, count);
3968       gtk_text_layout_move_iter_to_x (text_view->layout, &newplace, cursor_x_pos);
3969       break;
3970
3971     case GTK_MOVEMENT_DISPLAY_LINE_ENDS:
3972       if (count > 1)
3973         gtk_text_view_move_iter_by_lines (text_view, &newplace, --count);
3974       else if (count < -1)
3975         gtk_text_view_move_iter_by_lines (text_view, &newplace, ++count);
3976
3977       if (count != 0)
3978         gtk_text_layout_move_iter_to_line_end (text_view->layout, &newplace, count);
3979       break;
3980
3981     case GTK_MOVEMENT_PARAGRAPHS:
3982       gtk_text_iter_forward_lines (&newplace, count);
3983       gtk_text_iter_set_line_offset (&newplace, 0);
3984       break;
3985
3986     case GTK_MOVEMENT_PARAGRAPH_ENDS:
3987       if (count > 0)
3988         gtk_text_iter_forward_to_line_end (&newplace);
3989       else if (count < 0)
3990         gtk_text_iter_set_line_offset (&newplace, 0);
3991       break;
3992
3993     case GTK_MOVEMENT_BUFFER_ENDS:
3994       if (count > 0)
3995         gtk_text_buffer_get_end_iter (get_buffer (text_view), &newplace);
3996       else if (count < 0)
3997         gtk_text_buffer_get_iter_at_offset (get_buffer (text_view), &newplace, 0);
3998       break;
3999
4000     default:
4001       break;
4002     }
4003
4004   if (!gtk_text_iter_equal (&insert, &newplace))
4005     {
4006       if (extend_selection)
4007         gtk_text_buffer_move_mark (get_buffer (text_view),
4008                                    gtk_text_buffer_get_mark (get_buffer (text_view),
4009                                                              "insert"),
4010                                    &newplace);
4011       else
4012         gtk_text_buffer_place_cursor (get_buffer (text_view), &newplace);
4013
4014       DV(g_print (G_STRLOC": scrolling onscreen\n"));
4015       gtk_text_view_scroll_mark_onscreen (text_view,
4016                                           gtk_text_buffer_get_mark (get_buffer (text_view),
4017                                                                     "insert"));
4018
4019       if (step == GTK_MOVEMENT_DISPLAY_LINES)
4020         {
4021           gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, -1);
4022         }
4023     }
4024
4025   gtk_text_view_pend_cursor_blink (text_view);
4026 }
4027
4028 static void
4029 gtk_text_view_set_anchor (GtkTextView *text_view)
4030 {
4031   GtkTextIter insert;
4032
4033   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
4034                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4035                                                               "insert"));
4036
4037   gtk_text_buffer_create_mark (get_buffer (text_view), "anchor", &insert, TRUE);
4038 }
4039
4040 static void
4041 gtk_text_view_scroll_pages (GtkTextView *text_view,
4042                             gint         count)
4043 {
4044   gdouble newval;
4045   GtkAdjustment *adj;
4046   gint cursor_x_pos, cursor_y_pos;
4047   GtkTextIter new_insert;
4048   GtkTextIter anchor;
4049   gint y0, y1;
4050
4051   g_return_if_fail (text_view->vadjustment != NULL);
4052
4053   adj = text_view->vadjustment;
4054
4055   /* Validate the region that will be brought into view by the cursor motion
4056    */
4057   if (count < 0)
4058     {
4059       gtk_text_view_get_first_para_iter (text_view, &anchor);
4060       y0 = adj->page_size;
4061       y1 = adj->page_size + count * adj->page_increment;
4062     }
4063   else
4064     {
4065       gtk_text_view_get_first_para_iter (text_view, &anchor);
4066       y0 = count * adj->page_increment + adj->page_size;
4067       y1 = 0;
4068     }
4069
4070   gtk_text_layout_validate_yrange (text_view->layout, &anchor, y0, y1);
4071   /* FIXME do we need to update the adjustment ranges here? */
4072
4073   gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, &cursor_y_pos);
4074
4075   newval = adj->value;
4076
4077   newval += count * adj->page_increment;
4078
4079   cursor_y_pos += newval - adj->value;
4080   set_adjustment_clamped (adj, newval);
4081
4082   gtk_text_layout_get_iter_at_pixel (text_view->layout, &new_insert, cursor_x_pos, cursor_y_pos);
4083   clamp_iter_onscreen (text_view, &new_insert);
4084   gtk_text_buffer_place_cursor (get_buffer (text_view), &new_insert);
4085
4086   gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, cursor_y_pos);
4087
4088   /* Adjust to have the cursor _entirely_ onscreen, move_mark_onscreen
4089    * only guarantees 1 pixel onscreen.
4090    */
4091   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4092   gtk_text_view_scroll_mark_onscreen (text_view,
4093                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4094                                                                 "insert"));
4095 }
4096
4097 static gboolean
4098 whitespace (gunichar ch, gpointer user_data)
4099 {
4100   return (ch == ' ' || ch == '\t');
4101 }
4102
4103 static gboolean
4104 not_whitespace (gunichar ch, gpointer user_data)
4105 {
4106   return !whitespace (ch, user_data);
4107 }
4108
4109 static gboolean
4110 find_whitepace_region (const GtkTextIter *center,
4111                        GtkTextIter *start, GtkTextIter *end)
4112 {
4113   *start = *center;
4114   *end = *center;
4115
4116   if (gtk_text_iter_backward_find_char (start, not_whitespace, NULL, NULL))
4117     gtk_text_iter_forward_char (start); /* we want the first whitespace... */
4118   if (whitespace (gtk_text_iter_get_char (end), NULL))
4119     gtk_text_iter_forward_find_char (end, not_whitespace, NULL, NULL);
4120
4121   return !gtk_text_iter_equal (start, end);
4122 }
4123
4124 static void
4125 gtk_text_view_insert_at_cursor (GtkTextView *text_view,
4126                                 const gchar *str)
4127 {
4128   gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
4129                                                 text_view->editable);
4130 }
4131
4132 static void
4133 gtk_text_view_delete_from_cursor (GtkTextView   *text_view,
4134                                   GtkDeleteType  type,
4135                                   gint           count)
4136 {
4137   GtkTextIter insert;
4138   GtkTextIter start;
4139   GtkTextIter end;
4140   gboolean leave_one = FALSE;
4141
4142   gtk_text_view_reset_im_context (text_view);
4143
4144   if (type == GTK_DELETE_CHARS)
4145     {
4146       /* Char delete deletes the selection, if one exists */
4147       if (gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
4148                                             text_view->editable))
4149         return;
4150     }
4151
4152   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4153                                     &insert,
4154                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4155                                                               "insert"));
4156
4157   start = insert;
4158   end = insert;
4159
4160   switch (type)
4161     {
4162     case GTK_DELETE_CHARS:
4163       gtk_text_iter_forward_cursor_positions (&end, count);
4164       break;
4165
4166     case GTK_DELETE_WORD_ENDS:
4167       if (count > 0)
4168         gtk_text_iter_forward_word_ends (&end, count);
4169       else if (count < 0)
4170         gtk_text_iter_backward_word_starts (&start, 0 - count);
4171       break;
4172
4173     case GTK_DELETE_WORDS:
4174       break;
4175
4176     case GTK_DELETE_DISPLAY_LINE_ENDS:
4177       break;
4178
4179     case GTK_DELETE_DISPLAY_LINES:
4180       break;
4181
4182     case GTK_DELETE_PARAGRAPH_ENDS:
4183       /* If we're already at a newline, we need to
4184        * simply delete that newline, instead of
4185        * moving to the next one.
4186        */
4187       if (gtk_text_iter_ends_line (&end))
4188         {
4189           gtk_text_iter_forward_line (&end);
4190           --count;
4191         }
4192
4193       while (count > 0)
4194         {
4195           if (!gtk_text_iter_forward_to_line_end (&end))
4196             break;
4197
4198           --count;
4199         }
4200
4201       /* FIXME figure out what a negative count means
4202          and support that */
4203       break;
4204
4205     case GTK_DELETE_PARAGRAPHS:
4206       if (count > 0)
4207         {
4208           gtk_text_iter_set_line_offset (&start, 0);
4209           gtk_text_iter_forward_to_line_end (&end);
4210
4211           /* Do the lines beyond the first. */
4212           while (count > 1)
4213             {
4214               gtk_text_iter_forward_to_line_end (&end);
4215
4216               --count;
4217             }
4218         }
4219
4220       /* FIXME negative count? */
4221
4222       break;
4223
4224     case GTK_DELETE_WHITESPACE:
4225       {
4226         find_whitepace_region (&insert, &start, &end);
4227       }
4228       break;
4229
4230     default:
4231       break;
4232     }
4233
4234   if (!gtk_text_iter_equal (&start, &end))
4235     {
4236       gtk_text_buffer_begin_user_action (get_buffer (text_view));
4237
4238       if (gtk_text_buffer_delete_interactive (get_buffer (text_view), &start, &end,
4239                                               text_view->editable))
4240         {
4241           if (leave_one)
4242             gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view),
4243                                                           " ", 1,
4244                                                           text_view->editable);
4245         }
4246
4247       gtk_text_buffer_end_user_action (get_buffer (text_view));
4248
4249       DV(g_print (G_STRLOC": scrolling onscreen\n"));
4250       gtk_text_view_scroll_mark_onscreen (text_view,
4251                                           gtk_text_buffer_get_mark (get_buffer (text_view), "insert"));
4252     }
4253 }
4254
4255 static void
4256 gtk_text_view_cut_clipboard (GtkTextView *text_view)
4257 {
4258   gtk_text_buffer_cut_clipboard (get_buffer (text_view),
4259                                  gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
4260                                  text_view->editable);
4261   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4262   gtk_text_view_scroll_mark_onscreen (text_view,
4263                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4264                                                                 "insert"));
4265 }
4266
4267 static void
4268 gtk_text_view_copy_clipboard (GtkTextView *text_view)
4269 {
4270   gtk_text_buffer_copy_clipboard (get_buffer (text_view),
4271                                   gtk_clipboard_get (GDK_SELECTION_CLIPBOARD));
4272   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4273   gtk_text_view_scroll_mark_onscreen (text_view,
4274                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4275                                                                 "insert"));
4276 }
4277
4278 static void
4279 gtk_text_view_paste_clipboard (GtkTextView *text_view)
4280 {
4281   gtk_text_buffer_paste_clipboard (get_buffer (text_view),
4282                                    gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
4283                                    NULL,
4284                                    text_view->editable);
4285   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4286   gtk_text_view_scroll_mark_onscreen (text_view,
4287                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4288                                                                 "insert"));
4289 }
4290
4291 static void
4292 gtk_text_view_toggle_overwrite (GtkTextView *text_view)
4293 {
4294   text_view->overwrite_mode = !text_view->overwrite_mode;
4295 }
4296
4297 /*
4298  * Selections
4299  */
4300
4301 static void
4302 gtk_text_view_unselect (GtkTextView *text_view)
4303 {
4304   GtkTextIter insert;
4305
4306   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4307                                     &insert,
4308                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4309                                                               "insert"));
4310
4311   gtk_text_buffer_move_mark (get_buffer (text_view),
4312                              gtk_text_buffer_get_mark (get_buffer (text_view),
4313                                                        "selection_bound"),
4314                              &insert);
4315 }
4316
4317 static void
4318 move_mark_to_pointer_and_scroll (GtkTextView *text_view,
4319                                  const gchar *mark_name)
4320 {
4321   gint x, y;
4322   GdkModifierType state;
4323   GtkTextIter newplace;
4324
4325   /*   DV(g_print (G_STRLOC": begin\n")); */
4326
4327   gdk_window_get_pointer (text_view->text_window->bin_window,
4328                           &x, &y, &state);
4329
4330   /*   DV(g_print (G_STRLOC": get iter at pixel\n"); */
4331   gtk_text_layout_get_iter_at_pixel (text_view->layout,
4332                                      &newplace,
4333                                      x + text_view->xoffset,
4334                                      y + text_view->yoffset);
4335
4336   {
4337     GtkTextMark *mark =
4338       gtk_text_buffer_get_mark (get_buffer (text_view), mark_name);
4339
4340     DV(g_print (G_STRLOC": move mark\n"));
4341     gtk_text_buffer_move_mark (get_buffer (text_view),
4342                                mark,
4343                                &newplace);
4344
4345     DV(g_print (G_STRLOC": scrolling onscreen\n"));
4346     gtk_text_view_scroll_mark_onscreen (text_view, mark);
4347   }
4348 }
4349
4350 static gint
4351 selection_scan_timeout (gpointer data)
4352 {
4353   GtkTextView *text_view;
4354
4355   GDK_THREADS_ENTER ();
4356
4357   text_view = GTK_TEXT_VIEW (data);
4358
4359   DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
4360   move_mark_to_pointer_and_scroll (text_view, "insert");
4361
4362   GDK_THREADS_LEAVE ();
4363
4364   return TRUE; /* remain installed. */
4365 }
4366
4367 #define DND_SCROLL_MARGIN 0.20
4368
4369 static gint
4370 drag_scan_timeout (gpointer data)
4371 {
4372   GtkTextView *text_view;
4373   gint x, y;
4374   GdkModifierType state;
4375   GtkTextIter newplace;
4376
4377   GDK_THREADS_ENTER ();
4378
4379   text_view = GTK_TEXT_VIEW (data);
4380
4381   gdk_window_get_pointer (text_view->text_window->bin_window,
4382                           &x, &y, &state);
4383
4384   gtk_text_layout_get_iter_at_pixel (text_view->layout,
4385                                      &newplace,
4386                                      x + text_view->xoffset,
4387                                      y + text_view->yoffset);
4388
4389   gtk_text_buffer_move_mark (get_buffer (text_view),
4390                              text_view->dnd_mark,
4391                              &newplace);
4392
4393   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4394   gtk_text_view_scroll_to_mark (text_view,
4395                                 text_view->dnd_mark,
4396                                 DND_SCROLL_MARGIN, FALSE, 0.0, 0.0);
4397
4398   GDK_THREADS_LEAVE ();
4399
4400   return TRUE;
4401 }
4402
4403 static gint
4404 selection_motion_event_handler (GtkTextView *text_view, GdkEventMotion *event, gpointer data)
4405 {
4406   DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
4407   move_mark_to_pointer_and_scroll (text_view, "insert");
4408
4409   /* If we had to scroll offscreen, insert a timeout to do so
4410    * again. Note that in the timeout, even if the mouse doesn't
4411    * move, due to this scroll xoffset/yoffset will have changed
4412    * and we'll need to scroll again.
4413    */
4414   if (text_view->scroll_timeout != 0) /* reset on every motion event */
4415     gtk_timeout_remove (text_view->scroll_timeout);
4416
4417   text_view->scroll_timeout =
4418     gtk_timeout_add (50, selection_scan_timeout, text_view);
4419
4420   return TRUE;
4421 }
4422
4423 static void
4424 gtk_text_view_start_selection_drag (GtkTextView       *text_view,
4425                                     const GtkTextIter *iter,
4426                                     GdkEventButton    *button)
4427 {
4428   GtkTextIter newplace;
4429
4430   g_return_if_fail (text_view->selection_drag_handler == 0);
4431
4432   gtk_grab_add (GTK_WIDGET (text_view));
4433
4434   newplace = *iter;
4435
4436   gtk_text_buffer_place_cursor (get_buffer (text_view), &newplace);
4437
4438   text_view->selection_drag_handler = gtk_signal_connect (GTK_OBJECT (text_view),
4439                                                           "motion_notify_event",
4440                                                           GTK_SIGNAL_FUNC (selection_motion_event_handler),
4441                                                           NULL);
4442 }
4443
4444 /* returns whether we were really dragging */
4445 static gboolean
4446 gtk_text_view_end_selection_drag (GtkTextView *text_view, GdkEventButton *event)
4447 {
4448   if (text_view->selection_drag_handler == 0)
4449     return FALSE;
4450
4451   gtk_signal_disconnect (GTK_OBJECT (text_view), text_view->selection_drag_handler);
4452   text_view->selection_drag_handler = 0;
4453
4454   if (text_view->scroll_timeout != 0)
4455     {
4456       gtk_timeout_remove (text_view->scroll_timeout);
4457       text_view->scroll_timeout = 0;
4458     }
4459
4460   /* one last update to current position */
4461   DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
4462   move_mark_to_pointer_and_scroll (text_view, "insert");
4463
4464   gtk_grab_remove (GTK_WIDGET (text_view));
4465
4466   return TRUE;
4467 }
4468
4469 /*
4470  * Layout utils
4471  */
4472
4473 static void
4474 gtk_text_view_set_attributes_from_style (GtkTextView        *text_view,
4475                                          GtkTextAttributes  *values,
4476                                          GtkStyle           *style)
4477 {
4478   values->appearance.bg_color = style->base[GTK_STATE_NORMAL];
4479   values->appearance.fg_color = style->text[GTK_STATE_NORMAL];
4480
4481   if (values->font)
4482     pango_font_description_free (values->font);
4483
4484   values->font = pango_font_description_copy (style->font_desc);
4485 }
4486
4487 static void
4488 gtk_text_view_check_keymap_direction (GtkTextView *text_view)
4489 {
4490   if (text_view->layout)
4491     {
4492       gboolean split_cursor;
4493       GtkTextDirection new_dir;
4494       GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
4495
4496       g_object_get (G_OBJECT (settings),
4497                     "gtk-split-cursor", &split_cursor,
4498                     NULL);
4499       if (split_cursor)
4500         new_dir = GTK_TEXT_DIR_NONE;
4501       else
4502         new_dir = (gdk_keymap_get_direction (gdk_keymap_get_default ()) == PANGO_DIRECTION_LTR) ?
4503           GTK_TEXT_DIR_LTR : GTK_TEXT_DIR_RTL;
4504
4505       if (text_view->layout->cursor_direction != new_dir)
4506         gtk_text_layout_set_cursor_direction (text_view->layout, new_dir);
4507     }
4508 }
4509
4510 static void
4511 gtk_text_view_ensure_layout (GtkTextView *text_view)
4512 {
4513   GtkWidget *widget;
4514
4515   widget = GTK_WIDGET (text_view);
4516
4517   if (text_view->layout == NULL)
4518     {
4519       GtkTextAttributes *style;
4520       PangoContext *ltr_context, *rtl_context;
4521       GSList *tmp_list;
4522
4523       DV(g_print(G_STRLOC"\n"));
4524
4525       text_view->layout = gtk_text_layout_new ();
4526
4527       g_signal_connect (G_OBJECT (text_view->layout),
4528                         "invalidated",
4529                         G_CALLBACK (invalidated_handler),
4530                         text_view);
4531
4532       g_signal_connect (G_OBJECT (text_view->layout),
4533                         "changed",
4534                         G_CALLBACK (changed_handler),
4535                         text_view);
4536
4537       g_signal_connect (G_OBJECT (text_view->layout),
4538                         "allocate_child",
4539                         G_CALLBACK (gtk_text_view_child_allocated),
4540                         text_view);
4541
4542       if (get_buffer (text_view))
4543         gtk_text_layout_set_buffer (text_view->layout, get_buffer (text_view));
4544
4545       if ((GTK_WIDGET_HAS_FOCUS (text_view) && text_view->cursor_visible))
4546         gtk_text_view_pend_cursor_blink (text_view);
4547       else
4548         gtk_text_layout_set_cursor_visible (text_view->layout, FALSE);
4549
4550       ltr_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
4551       pango_context_set_base_dir (ltr_context, PANGO_DIRECTION_LTR);
4552       rtl_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
4553       pango_context_set_base_dir (rtl_context, PANGO_DIRECTION_RTL);
4554
4555       gtk_text_layout_set_contexts (text_view->layout, ltr_context, rtl_context);
4556
4557       g_object_unref (G_OBJECT (ltr_context));
4558       g_object_unref (G_OBJECT (rtl_context));
4559
4560       gtk_text_view_check_keymap_direction (text_view);
4561
4562       style = gtk_text_attributes_new ();
4563
4564       gtk_widget_ensure_style (widget);
4565       gtk_text_view_set_attributes_from_style (text_view,
4566                                                style, widget->style);
4567
4568       style->pixels_above_lines = text_view->pixels_above_lines;
4569       style->pixels_below_lines = text_view->pixels_below_lines;
4570       style->pixels_inside_wrap = text_view->pixels_inside_wrap;
4571       style->left_margin = text_view->left_margin;
4572       style->right_margin = text_view->right_margin;
4573       style->indent = text_view->indent;
4574       style->tabs = text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
4575
4576       style->wrap_mode = text_view->wrap_mode;
4577       style->justification = text_view->justify;
4578       style->direction = gtk_widget_get_direction (GTK_WIDGET (text_view));
4579
4580       gtk_text_layout_set_default_style (text_view->layout, style);
4581
4582       gtk_text_attributes_unref (style);
4583
4584       /* Set layout for all anchored children */
4585
4586       tmp_list = text_view->children;
4587       while (tmp_list != NULL)
4588         {
4589           GtkTextViewChild *vc = tmp_list->data;
4590
4591           if (vc->anchor)
4592             {
4593               gtk_text_anchored_child_set_layout (vc->widget,
4594                                                   text_view->layout);
4595               /* vc may now be invalid! */
4596             }
4597
4598           tmp_list = g_slist_next (tmp_list);
4599         }
4600     }
4601 }
4602
4603 /**
4604  * gtk_text_view_get_default_attributes:
4605  * @text_view: a #GtkTextView
4606  *
4607  * Obtains a copy of the default text attributes. These are the
4608  * attributes used for text unless a tag overrides them.
4609  * You'd typically pass the default attributes in to
4610  * gtk_text_tag_get_attributes() in order to get the
4611  * attributes in effect at a given text position.
4612  *
4613  * The return value is a copy owned by the caller of this function,
4614  * and should be freed.
4615  *
4616  * Return value: a new #GtkTextAttributes
4617  **/
4618 GtkTextAttributes*
4619 gtk_text_view_get_default_attributes (GtkTextView *text_view)
4620 {
4621   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
4622
4623   gtk_text_view_ensure_layout (text_view);
4624
4625   return gtk_text_attributes_copy (text_view->layout->default_style);
4626 }
4627
4628 static void
4629 gtk_text_view_destroy_layout (GtkTextView *text_view)
4630 {
4631   if (text_view->layout)
4632     {
4633       GSList *tmp_list;
4634
4635       if (text_view->incremental_validate_idle)
4636         {
4637           g_source_remove (text_view->incremental_validate_idle);
4638           text_view->incremental_validate_idle = 0;
4639         }
4640
4641       /* Remove layout from all anchored children */
4642
4643       tmp_list = text_view->children;
4644       while (tmp_list != NULL)
4645         {
4646           GtkTextViewChild *vc = tmp_list->data;
4647
4648           if (vc->anchor)
4649             {
4650               gtk_text_anchored_child_set_layout (vc->widget, NULL);
4651               /* vc may now be invalid! */
4652             }
4653
4654           tmp_list = g_slist_next (tmp_list);
4655         }
4656
4657       gtk_text_view_stop_cursor_blink (text_view);
4658       gtk_text_view_end_selection_drag (text_view, NULL);
4659
4660       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->layout),
4661                                             invalidated_handler, text_view);
4662       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->layout),
4663                                             changed_handler, text_view);
4664       g_object_unref (G_OBJECT (text_view->layout));
4665       text_view->layout = NULL;
4666     }
4667 }
4668
4669 static void
4670 gtk_text_view_reset_im_context (GtkTextView *text_view)
4671 {
4672   if (text_view->need_im_reset)
4673     {
4674       text_view->need_im_reset = FALSE;
4675       gtk_im_context_reset (text_view->im_context);
4676       gtk_text_view_update_im_spot_location (text_view);
4677     }
4678 }
4679
4680 /*
4681  * DND feature
4682  */
4683
4684 static void
4685 gtk_text_view_start_selection_dnd (GtkTextView       *text_view,
4686                                    const GtkTextIter *iter,
4687                                    GdkEventMotion    *event)
4688 {
4689   GdkDragContext *context;
4690   GtkTargetList *target_list;
4691
4692   text_view->drag_start_x = -1;
4693   text_view->drag_start_y = -1;
4694   text_view->pending_place_cursor_button = 0;
4695
4696   target_list = gtk_target_list_new (target_table,
4697                                      G_N_ELEMENTS (target_table));
4698
4699   context = gtk_drag_begin (GTK_WIDGET (text_view), target_list,
4700                             GDK_ACTION_COPY | GDK_ACTION_MOVE,
4701                             1, (GdkEvent*)event);
4702
4703   gtk_target_list_unref (target_list);
4704
4705   gtk_drag_set_icon_default (context);
4706 }
4707
4708 static void
4709 gtk_text_view_drag_begin (GtkWidget        *widget,
4710                           GdkDragContext   *context)
4711 {
4712   /* do nothing */
4713 }
4714
4715 static void
4716 gtk_text_view_drag_end (GtkWidget        *widget,
4717                         GdkDragContext   *context)
4718 {
4719   GtkTextView *text_view;
4720
4721   text_view = GTK_TEXT_VIEW (widget);
4722 }
4723
4724 static void
4725 gtk_text_view_drag_data_get (GtkWidget        *widget,
4726                              GdkDragContext   *context,
4727                              GtkSelectionData *selection_data,
4728                              guint             info,
4729                              guint             time)
4730 {
4731   GtkTextView *text_view;
4732
4733   text_view = GTK_TEXT_VIEW (widget);
4734
4735   if (selection_data->target == gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE))
4736     {
4737       GtkTextBuffer *buffer = gtk_text_view_get_buffer (text_view);
4738
4739       gtk_selection_data_set (selection_data,
4740                               gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE),
4741                               8, /* bytes */
4742                               (void*)&buffer,
4743                               sizeof (buffer));
4744     }
4745   else
4746     {
4747       gchar *str;
4748       GtkTextIter start;
4749       GtkTextIter end;
4750
4751       str = NULL;
4752
4753       if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
4754                                                 &start, &end))
4755         {
4756           /* Extract the selected text */
4757           str = gtk_text_iter_get_visible_text (&start, &end);
4758         }
4759
4760       if (str)
4761         {
4762           gtk_selection_data_set_text (selection_data, str);
4763           g_free (str);
4764         }
4765     }
4766 }
4767
4768 static void
4769 gtk_text_view_drag_data_delete (GtkWidget        *widget,
4770                                 GdkDragContext   *context)
4771 {
4772   GtkTextView *text_view;
4773
4774   text_view = GTK_TEXT_VIEW (widget);
4775
4776   gtk_text_buffer_delete_selection (GTK_TEXT_VIEW (widget)->buffer,
4777                                     TRUE, GTK_TEXT_VIEW (widget)->editable);
4778 }
4779
4780 static void
4781 gtk_text_view_drag_leave (GtkWidget        *widget,
4782                           GdkDragContext   *context,
4783                           guint             time)
4784 {
4785   GtkTextView *text_view;
4786
4787   text_view = GTK_TEXT_VIEW (widget);
4788
4789   gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
4790
4791   if (text_view->scroll_timeout != 0)
4792     gtk_timeout_remove (text_view->scroll_timeout);
4793
4794   text_view->scroll_timeout = 0;
4795 }
4796
4797 static gboolean
4798 gtk_text_view_drag_motion (GtkWidget        *widget,
4799                            GdkDragContext   *context,
4800                            gint              x,
4801                            gint              y,
4802                            guint             time)
4803 {
4804   GtkTextIter newplace;
4805   GtkTextView *text_view;
4806   GtkTextIter start;
4807   GtkTextIter end;
4808   GdkRectangle target_rect;
4809   gint bx, by;
4810   GdkDragAction suggested_action = 0;
4811
4812   text_view = GTK_TEXT_VIEW (widget);
4813
4814   target_rect = text_view->text_window->allocation;
4815
4816   if (x < target_rect.x ||
4817       y < target_rect.y ||
4818       x > (target_rect.x + target_rect.width) ||
4819       y > (target_rect.y + target_rect.height))
4820     return FALSE; /* outside the text window, allow parent widgets to handle event */
4821
4822   gtk_text_view_window_to_buffer_coords (text_view,
4823                                          GTK_TEXT_WINDOW_WIDGET,
4824                                          x, y,
4825                                          &bx, &by);
4826
4827   gtk_text_layout_get_iter_at_pixel (text_view->layout,
4828                                      &newplace,
4829                                      bx, by);
4830
4831   if (gtk_drag_dest_find_target (widget, context,
4832                                  gtk_drag_dest_get_target_list (widget)) == GDK_NONE)
4833     {
4834       /* can't accept any of the offered targets */
4835     }
4836   else if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
4837                                             &start, &end) &&
4838            gtk_text_iter_in_range (&newplace, &start, &end))
4839     {
4840       /* We're inside the selection. */
4841     }
4842   else
4843     {
4844       if (gtk_text_iter_can_insert (&newplace, text_view->editable))
4845         {
4846           GtkWidget *source_widget;
4847
4848           suggested_action = context->suggested_action;
4849
4850           source_widget = gtk_drag_get_source_widget (context);
4851
4852           if (source_widget == widget)
4853             {
4854               /* Default to MOVE, unless the user has
4855                * pressed ctrl or alt to affect available actions
4856                */
4857               if ((context->actions & GDK_ACTION_MOVE) != 0)
4858                 suggested_action = GDK_ACTION_MOVE;
4859             }
4860         }
4861       else
4862         {
4863           /* Can't drop here. */
4864         }
4865     }
4866
4867   if (suggested_action != 0)
4868     {
4869       gtk_text_mark_set_visible (text_view->dnd_mark,
4870                                  text_view->cursor_visible);
4871
4872       gdk_drag_status (context, suggested_action, time);
4873     }
4874   else
4875     {
4876       gdk_drag_status (context, 0, time);
4877       gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
4878     }
4879
4880   gtk_text_buffer_move_mark (get_buffer (text_view),
4881                              text_view->dnd_mark,
4882                              &newplace);
4883
4884   DV(g_print (G_STRLOC": scrolling to mark\n"));
4885   gtk_text_view_scroll_to_mark (text_view,
4886                                 text_view->dnd_mark,
4887                                 DND_SCROLL_MARGIN, FALSE, 0.0, 0.0);
4888
4889   if (text_view->scroll_timeout != 0) /* reset on every motion event */
4890     gtk_timeout_remove (text_view->scroll_timeout);
4891
4892   text_view->scroll_timeout =
4893     gtk_timeout_add (50, drag_scan_timeout, text_view);
4894
4895   /* TRUE return means don't propagate the drag motion to parent
4896    * widgets that may also be drop sites.
4897    */
4898   return TRUE;
4899 }
4900
4901 static gboolean
4902 gtk_text_view_drag_drop (GtkWidget        *widget,
4903                          GdkDragContext   *context,
4904                          gint              x,
4905                          gint              y,
4906                          guint             time)
4907 {
4908   GtkTextView *text_view;
4909   GtkTextIter drop_point;
4910   GdkAtom target = GDK_NONE;
4911
4912   text_view = GTK_TEXT_VIEW (widget);
4913
4914   if (text_view->scroll_timeout != 0)
4915     gtk_timeout_remove (text_view->scroll_timeout);
4916
4917   text_view->scroll_timeout = 0;
4918
4919   gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
4920
4921   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4922                                     &drop_point,
4923                                     text_view->dnd_mark);
4924
4925   if (gtk_text_iter_can_insert (&drop_point, text_view->editable))
4926     target = gtk_drag_dest_find_target (widget, context, NULL);
4927
4928   if (target != GDK_NONE)
4929     gtk_drag_get_data (widget, context, target, time);
4930   else
4931     gtk_drag_finish (context, FALSE, FALSE, time);
4932
4933   return TRUE;
4934 }
4935
4936 static void
4937 insert_text_data (GtkTextView      *text_view,
4938                   GtkTextIter      *drop_point,
4939                   GtkSelectionData *selection_data)
4940 {
4941   gchar *str;
4942
4943   str = gtk_selection_data_get_text (selection_data);
4944
4945   if (str)
4946     {
4947       gtk_text_buffer_insert_interactive (get_buffer (text_view),
4948                                           drop_point, str, -1,
4949                                           text_view->editable);
4950       g_free (str);
4951     }
4952 }
4953
4954 static void
4955 gtk_text_view_drag_data_received (GtkWidget        *widget,
4956                                   GdkDragContext   *context,
4957                                   gint              x,
4958                                   gint              y,
4959                                   GtkSelectionData *selection_data,
4960                                   guint             info,
4961                                   guint             time)
4962 {
4963   GtkTextIter drop_point;
4964   GtkTextView *text_view;
4965   gboolean success = FALSE;
4966
4967   text_view = GTK_TEXT_VIEW (widget);
4968
4969   if (!text_view->dnd_mark)
4970     goto done;
4971
4972   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4973                                     &drop_point,
4974                                     text_view->dnd_mark);
4975
4976   if (!gtk_text_iter_can_insert (&drop_point, text_view->editable))
4977     goto done;
4978
4979   if (selection_data->target == gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE))
4980     {
4981       GtkTextBuffer *src_buffer = NULL;
4982       GtkTextIter start, end;
4983       gboolean copy_tags = TRUE;
4984
4985       if (selection_data->length != sizeof (src_buffer))
4986         return;
4987
4988       memcpy (&src_buffer, selection_data->data, sizeof (src_buffer));
4989
4990       if (src_buffer == NULL)
4991         return;
4992
4993       g_return_if_fail (GTK_IS_TEXT_BUFFER (src_buffer));
4994
4995       if (gtk_text_buffer_get_tag_table (src_buffer) !=
4996           gtk_text_buffer_get_tag_table (get_buffer (text_view)))
4997         copy_tags = FALSE;
4998
4999       if (gtk_text_buffer_get_selection_bounds (src_buffer,
5000                                                 &start,
5001                                                 &end))
5002         {
5003           if (copy_tags)
5004             gtk_text_buffer_insert_range_interactive (get_buffer (text_view),
5005                                                       &drop_point,
5006                                                       &start,
5007                                                       &end,
5008                                                       text_view->editable);
5009           else
5010             {
5011               gchar *str;
5012
5013               str = gtk_text_iter_get_visible_text (&start, &end);
5014               gtk_text_buffer_insert_interactive (get_buffer (text_view),
5015                                                   &drop_point, str, -1,
5016                                                   text_view->editable);
5017               g_free (str);
5018             }
5019         }
5020     }
5021   else
5022     insert_text_data (text_view, &drop_point, selection_data);
5023
5024   success = TRUE;
5025
5026  done:
5027   gtk_drag_finish (context, success,
5028                    success && context->action == GDK_ACTION_MOVE,
5029                    time);
5030 }
5031
5032 static GtkAdjustment*
5033 get_hadjustment (GtkTextView *text_view)
5034 {
5035   if (text_view->hadjustment == NULL)
5036     gtk_text_view_set_scroll_adjustments (text_view,
5037                                           NULL, /* forces creation */
5038                                           text_view->vadjustment);
5039
5040   return text_view->hadjustment;
5041 }
5042
5043 static GtkAdjustment*
5044 get_vadjustment (GtkTextView *text_view)
5045 {
5046   if (text_view->vadjustment == NULL)
5047     gtk_text_view_set_scroll_adjustments (text_view,
5048                                           text_view->hadjustment,
5049                                           NULL); /* forces creation */
5050   return text_view->vadjustment;
5051 }
5052
5053
5054 static void
5055 gtk_text_view_set_scroll_adjustments (GtkTextView   *text_view,
5056                                       GtkAdjustment *hadj,
5057                                       GtkAdjustment *vadj)
5058 {
5059   gboolean need_adjust = FALSE;
5060
5061   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
5062
5063   if (hadj)
5064     g_return_if_fail (GTK_IS_ADJUSTMENT (hadj));
5065   else
5066     hadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
5067   if (vadj)
5068     g_return_if_fail (GTK_IS_ADJUSTMENT (vadj));
5069   else
5070     vadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
5071
5072   if (text_view->hadjustment && (text_view->hadjustment != hadj))
5073     {
5074       gtk_signal_disconnect_by_data (GTK_OBJECT (text_view->hadjustment), text_view);
5075       g_object_unref (G_OBJECT (text_view->hadjustment));
5076     }
5077
5078   if (text_view->vadjustment && (text_view->vadjustment != vadj))
5079     {
5080       gtk_signal_disconnect_by_data (GTK_OBJECT (text_view->vadjustment), text_view);
5081       g_object_unref (G_OBJECT (text_view->vadjustment));
5082     }
5083
5084   if (text_view->hadjustment != hadj)
5085     {
5086       text_view->hadjustment = hadj;
5087       g_object_ref (G_OBJECT (text_view->hadjustment));
5088       gtk_object_sink (GTK_OBJECT (text_view->hadjustment));
5089
5090       gtk_signal_connect (GTK_OBJECT (text_view->hadjustment), "value_changed",
5091                           (GtkSignalFunc) gtk_text_view_value_changed,
5092                           text_view);
5093       need_adjust = TRUE;
5094     }
5095
5096   if (text_view->vadjustment != vadj)
5097     {
5098       text_view->vadjustment = vadj;
5099       g_object_ref (G_OBJECT (text_view->vadjustment));
5100       gtk_object_sink (GTK_OBJECT (text_view->vadjustment));
5101
5102       gtk_signal_connect (GTK_OBJECT (text_view->vadjustment), "value_changed",
5103                           (GtkSignalFunc) gtk_text_view_value_changed,
5104                           text_view);
5105       need_adjust = TRUE;
5106     }
5107
5108   if (need_adjust)
5109     gtk_text_view_value_changed (NULL, text_view);
5110 }
5111
5112 static void
5113 gtk_text_view_value_changed (GtkAdjustment *adj,
5114                              GtkTextView   *text_view)
5115 {
5116   GtkTextIter iter;
5117   gint line_top;
5118   gint dx = 0;
5119   gint dy = 0;
5120
5121   text_view->onscreen_validated = FALSE;
5122
5123   DV(g_print(">Scroll offset changed, onscreen_validated = FALSE ("G_STRLOC")\n"));
5124
5125   if (adj == text_view->hadjustment)
5126     {
5127       dx = text_view->xoffset - (gint)adj->value;
5128       text_view->xoffset = adj->value;
5129     }
5130   else if (adj == text_view->vadjustment)
5131     {
5132       dy = text_view->yoffset - (gint)adj->value;
5133       text_view->yoffset = adj->value;
5134
5135       if (text_view->layout)
5136         {
5137           gtk_text_layout_get_line_at_y (text_view->layout, &iter, adj->value, &line_top);
5138
5139           gtk_text_buffer_move_mark (get_buffer (text_view), text_view->first_para_mark, &iter);
5140
5141           text_view->first_para_pixels = adj->value - line_top;
5142         }
5143     }
5144
5145   if (GTK_WIDGET_REALIZED (text_view) && (dx != 0 || dy != 0))
5146     {
5147       if (dy != 0)
5148         {
5149           if (text_view->left_window)
5150             text_window_scroll (text_view->left_window, 0, dy);
5151           if (text_view->right_window)
5152             text_window_scroll (text_view->right_window, 0, dy);
5153         }
5154
5155       if (dx != 0)
5156         {
5157           if (text_view->top_window)
5158             text_window_scroll (text_view->top_window, dx, 0);
5159           if (text_view->bottom_window)
5160             text_window_scroll (text_view->bottom_window, dx, 0);
5161         }
5162
5163       /* It looks nicer to scroll the main area last, because
5164        * it takes a while, and making the side areas update
5165        * afterward emphasizes the slowness of scrolling the
5166        * main area.
5167        */
5168       text_window_scroll (text_view->text_window, dx, dy);
5169     }
5170
5171   /* This could result in invalidation, which would install the
5172    * first_validate_idle, which would validate onscreen;
5173    * but we're going to go ahead and validate here, so
5174    * first_validate_idle shouldn't have anything to do.
5175    */
5176   gtk_text_view_update_layout_width (text_view);
5177
5178   /* note that validation of onscreen could invoke this function
5179    * recursively, by scrolling to maintain first_para, or in response
5180    * to updating the layout width, however there is no problem with
5181    * that, or shouldn't be.
5182    */
5183   gtk_text_view_validate_onscreen (text_view);
5184
5185   /* process exposes */
5186   if (GTK_WIDGET_REALIZED (text_view))
5187     {
5188       if (text_view->left_window)
5189         gdk_window_process_updates (text_view->left_window->bin_window, TRUE);
5190
5191       if (text_view->right_window)
5192         gdk_window_process_updates (text_view->right_window->bin_window, TRUE);
5193
5194       if (text_view->top_window)
5195         gdk_window_process_updates (text_view->top_window->bin_window, TRUE);
5196
5197       if (text_view->bottom_window)
5198         gdk_window_process_updates (text_view->bottom_window->bin_window, TRUE);
5199
5200       gdk_window_process_updates (text_view->text_window->bin_window, TRUE);
5201     }
5202
5203   /* If this got installed, get rid of it, it's just a waste of time. */
5204   if (text_view->first_validate_idle != 0)
5205     {
5206       g_source_remove (text_view->first_validate_idle);
5207       text_view->first_validate_idle = 0;
5208     }
5209
5210   gtk_text_view_update_im_spot_location (text_view);
5211
5212   DV(g_print(">End scroll offset changed handler ("G_STRLOC")\n"));
5213 }
5214
5215 static void
5216 gtk_text_view_commit_handler (GtkIMContext  *context,
5217                               const gchar   *str,
5218                               GtkTextView   *text_view)
5219 {
5220   gboolean had_selection;
5221
5222   gtk_text_buffer_begin_user_action (get_buffer (text_view));
5223
5224   had_selection = gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
5225                                                         NULL, NULL);
5226
5227   gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
5228                                     text_view->editable);
5229
5230   if (!strcmp (str, "\n"))
5231     {
5232       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\n", 1,
5233                                                     text_view->editable);
5234     }
5235   else
5236     {
5237       if (!had_selection && text_view->overwrite_mode)
5238         gtk_text_view_delete_from_cursor (text_view, GTK_DELETE_CHARS, 1);
5239       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
5240                                                     text_view->editable);
5241     }
5242
5243   gtk_text_buffer_end_user_action (get_buffer (text_view));
5244
5245   DV(g_print (G_STRLOC": scrolling onscreen\n"));
5246   gtk_text_view_scroll_mark_onscreen (text_view,
5247                                       gtk_text_buffer_get_mark (get_buffer (text_view),
5248                                                                 "insert"));
5249 }
5250
5251 static void
5252 gtk_text_view_preedit_changed_handler (GtkIMContext *context,
5253                                        GtkTextView  *text_view)
5254 {
5255   gchar *str;
5256   PangoAttrList *attrs;
5257   gint cursor_pos;
5258
5259   gtk_im_context_get_preedit_string (context, &str, &attrs, &cursor_pos);
5260   gtk_text_layout_set_preedit_string (text_view->layout, str, attrs, cursor_pos);
5261
5262   pango_attr_list_unref (attrs);
5263   g_free (str);
5264 }
5265
5266 static void
5267 gtk_text_view_mark_set_handler (GtkTextBuffer     *buffer,
5268                                 const GtkTextIter *location,
5269                                 GtkTextMark       *mark,
5270                                 gpointer           data)
5271 {
5272   GtkTextView *text_view = GTK_TEXT_VIEW (data);
5273   gboolean need_reset = FALSE;
5274
5275   if (mark == gtk_text_buffer_get_insert (buffer))
5276     {
5277       text_view->virtual_cursor_x = -1;
5278       text_view->virtual_cursor_y = -1;
5279       need_reset = TRUE;
5280     }
5281   else if (mark == gtk_text_buffer_get_selection_bound (buffer))
5282     {
5283       need_reset = TRUE;
5284     }
5285
5286   if (need_reset)
5287     gtk_text_view_reset_im_context (text_view);
5288 }
5289
5290 static void
5291 gtk_text_view_get_virtual_cursor_pos (GtkTextView *text_view,
5292                                       gint        *x,
5293                                       gint        *y)
5294 {
5295   GdkRectangle strong_pos;
5296   GtkTextIter insert;
5297
5298   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
5299                                     gtk_text_buffer_get_mark (get_buffer (text_view),
5300                                                               "insert"));
5301
5302   if ((x && text_view->virtual_cursor_x == -1) ||
5303       (y && text_view->virtual_cursor_y == -1))
5304     gtk_text_layout_get_cursor_locations (text_view->layout, &insert, &strong_pos, NULL);
5305
5306   if (x)
5307     {
5308       if (text_view->virtual_cursor_x != -1)
5309         *x = text_view->virtual_cursor_x;
5310       else
5311         *x = strong_pos.x;
5312     }
5313
5314   if (y)
5315     {
5316       if (text_view->virtual_cursor_x != -1)
5317         *y = text_view->virtual_cursor_y;
5318       else
5319         *y = strong_pos.y + strong_pos.height / 2;
5320     }
5321 }
5322
5323 static void
5324 gtk_text_view_set_virtual_cursor_pos (GtkTextView *text_view,
5325                                       gint         x,
5326                                       gint         y)
5327 {
5328   GdkRectangle strong_pos;
5329   GtkTextIter insert;
5330
5331   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
5332                                     gtk_text_buffer_get_mark (get_buffer (text_view),
5333                                                               "insert"));
5334
5335   if (x == -1 || y == -1)
5336     gtk_text_layout_get_cursor_locations (text_view->layout, &insert, &strong_pos, NULL);
5337
5338   text_view->virtual_cursor_x = (x == -1) ? strong_pos.x : x;
5339   text_view->virtual_cursor_y = (y == -1) ? strong_pos.y + strong_pos.height / 2 : y;
5340 }
5341
5342 /* Quick hack of a popup menu
5343  */
5344 static void
5345 activate_cb (GtkWidget   *menuitem,
5346              GtkTextView *text_view)
5347 {
5348   const gchar *signal = g_object_get_data (G_OBJECT (menuitem), "gtk-signal");
5349   gtk_signal_emit_by_name (GTK_OBJECT (text_view), signal);
5350 }
5351
5352 static void
5353 append_action_signal (GtkTextView  *text_view,
5354                       GtkWidget    *menu,
5355                       const gchar  *label,
5356                       const gchar  *signal,
5357                       gboolean      sensitive)
5358 {
5359   GtkWidget *menuitem = gtk_menu_item_new_with_label (label);
5360
5361   g_object_set_data (G_OBJECT (menuitem), "gtk-signal", (char *)signal);
5362   gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
5363                       GTK_SIGNAL_FUNC (activate_cb), text_view);
5364
5365   gtk_widget_set_sensitive (menuitem, sensitive);
5366
5367   gtk_widget_show (menuitem);
5368   gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
5369 }
5370
5371 static void
5372 popup_menu_detach (GtkWidget *attach_widget,
5373                    GtkMenu   *menu)
5374 {
5375   GTK_TEXT_VIEW (attach_widget)->popup_menu = NULL;
5376 }
5377
5378 static void
5379 popup_position_func (GtkMenu   *menu,
5380                      gint      *x,
5381                      gint      *y,
5382                      gboolean  *push_in,
5383                      gpointer   user_data)
5384 {
5385   GtkTextView *text_view;
5386   GtkWidget *widget;
5387   GdkRectangle cursor_rect;
5388   GdkRectangle onscreen_rect;
5389   gint root_x, root_y;
5390   GtkTextIter iter;
5391   GtkRequisition req;
5392
5393   text_view = GTK_TEXT_VIEW (user_data);
5394   widget = GTK_WIDGET (text_view);
5395
5396   g_return_if_fail (GTK_WIDGET_REALIZED (text_view));
5397
5398   gdk_window_get_origin (widget->window, &root_x, &root_y);
5399
5400   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
5401                                     &iter,
5402                                     gtk_text_buffer_get_insert (get_buffer (text_view)));
5403
5404   gtk_text_view_get_iter_location (text_view,
5405                                    &iter,
5406                                    &cursor_rect);
5407
5408   gtk_text_view_get_visible_rect (text_view, &onscreen_rect);
5409
5410   gtk_widget_size_request (text_view->popup_menu, &req);
5411
5412   /* can't use rectangle_intersect since cursor rect can have 0 width */
5413   if (cursor_rect.x >= onscreen_rect.x &&
5414       cursor_rect.x < onscreen_rect.x + onscreen_rect.width &&
5415       cursor_rect.y >= onscreen_rect.y &&
5416       cursor_rect.y < onscreen_rect.y + onscreen_rect.height)
5417     {
5418       gtk_text_view_buffer_to_window_coords (text_view,
5419                                              GTK_TEXT_WINDOW_WIDGET,
5420                                              cursor_rect.x, cursor_rect.y,
5421                                              &cursor_rect.x, &cursor_rect.y);
5422
5423       *x = root_x + cursor_rect.x + cursor_rect.width;
5424       *y = root_y + cursor_rect.y + cursor_rect.height;
5425     }
5426   else
5427     {
5428       /* Just center the menu, since cursor is offscreen. */
5429       *x = root_x + (widget->allocation.width / 2 - req.width / 2);
5430       *y = root_y + (widget->allocation.height / 2 - req.height / 2);
5431     }
5432
5433   /* Ensure sanity */
5434   *x = CLAMP (*x, root_x, (root_x + widget->allocation.width));
5435   *y = CLAMP (*y, root_y, (root_y + widget->allocation.height));
5436
5437   *x = CLAMP (*x, 0, MAX (0, gdk_screen_width () - req.width));
5438   *y = CLAMP (*y, 0, MAX (0, gdk_screen_height () - req.height));
5439 }
5440
5441 typedef struct
5442 {
5443   GtkTextView *text_view;
5444   gint button;
5445   guint time;
5446 } PopupInfo;
5447
5448 static void
5449 popup_targets_received (GtkClipboard     *clipboard,
5450                         GtkSelectionData *data,
5451                         gpointer          user_data)
5452 {
5453   PopupInfo *info = user_data;
5454   GtkTextView *text_view = info->text_view;
5455
5456   if (GTK_WIDGET_REALIZED (text_view))
5457     {
5458       /* We implicitely rely here on the fact that if we are pasting ourself, we'll
5459        * have text targets as well as the private GTK_TEXT_BUFFER_CONTENTS target.
5460        */
5461       gboolean clipboard_contains_text = gtk_selection_data_targets_include_text (data);
5462       GtkWidget *menuitem;
5463       GtkWidget *submenu;
5464       gboolean have_selection;
5465       gboolean can_insert;
5466       GtkTextIter iter;
5467
5468       if (text_view->popup_menu)
5469         gtk_widget_destroy (text_view->popup_menu);
5470
5471       text_view->popup_menu = gtk_menu_new ();
5472
5473       gtk_menu_attach_to_widget (GTK_MENU (text_view->popup_menu),
5474                                  GTK_WIDGET (text_view),
5475                                  popup_menu_detach);
5476
5477       have_selection = gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
5478                                                              NULL, NULL);
5479
5480       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
5481                                         &iter,
5482                                         gtk_text_buffer_get_insert (get_buffer (text_view)));
5483
5484       can_insert = gtk_text_iter_can_insert (&iter, text_view->editable);
5485
5486       append_action_signal (text_view, text_view->popup_menu, _("Cut"), "cut_clipboard",
5487                             have_selection);
5488       append_action_signal (text_view, text_view->popup_menu, _("Copy"), "copy_clipboard",
5489                             have_selection);
5490       append_action_signal (text_view, text_view->popup_menu, _("Paste"), "paste_clipboard",
5491                             can_insert && clipboard_contains_text);
5492
5493       menuitem = gtk_separator_menu_item_new ();
5494       gtk_widget_show (menuitem);
5495       gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
5496
5497       menuitem = gtk_menu_item_new_with_label (_("Input Methods"));
5498       gtk_widget_show (menuitem);
5499       submenu = gtk_menu_new ();
5500       gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), submenu);
5501       gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
5502
5503       gtk_im_multicontext_append_menuitems (GTK_IM_MULTICONTEXT (text_view->im_context),
5504                                             GTK_MENU_SHELL (submenu));
5505
5506       gtk_signal_emit (GTK_OBJECT (text_view),
5507                        signals[POPULATE_POPUP],
5508                        text_view->popup_menu);
5509
5510       if (info->button)
5511         gtk_menu_popup (GTK_MENU (text_view->popup_menu), NULL, NULL,
5512                         NULL, NULL,
5513                         info->button, info->time);
5514       else
5515         gtk_menu_popup (GTK_MENU (text_view->popup_menu), NULL, NULL,
5516                         popup_position_func, text_view,
5517                         0, gtk_get_current_event_time ());
5518     }
5519
5520   g_object_unref (text_view);
5521   g_free (info);
5522 }
5523
5524 static void
5525 gtk_text_view_do_popup (GtkTextView    *text_view,
5526                         GdkEventButton *event)
5527 {
5528   PopupInfo *info = g_new (PopupInfo, 1);
5529
5530   /* In order to know what entries we should make sensitive, we
5531    * ask for the current targets of the clipboard, and when
5532    * we get them, then we actually pop up the menu.
5533    */
5534   info->text_view = g_object_ref (text_view);
5535
5536   if (event)
5537     {
5538       info->button = event->button;
5539       info->time = event->time;
5540     }
5541   else
5542     {
5543       info->button = 0;
5544       info->time = gtk_get_current_event_time ();
5545     }
5546
5547   gtk_clipboard_request_contents (gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
5548                                   gdk_atom_intern ("TARGETS", FALSE),
5549                                   popup_targets_received,
5550                                   info);
5551 }
5552
5553 static void
5554 gtk_text_view_popup_menu (GtkWidget *widget)
5555 {
5556   gtk_text_view_do_popup (GTK_TEXT_VIEW (widget), NULL);
5557 }
5558
5559 /* Child GdkWindows */
5560
5561
5562 static GtkTextWindow*
5563 text_window_new (GtkTextWindowType  type,
5564                  GtkWidget         *widget,
5565                  gint               width_request,
5566                  gint               height_request)
5567 {
5568   GtkTextWindow *win;
5569
5570   win = g_new (GtkTextWindow, 1);
5571
5572   win->type = type;
5573   win->widget = widget;
5574   win->window = NULL;
5575   win->bin_window = NULL;
5576   win->requisition.width = width_request;
5577   win->requisition.height = height_request;
5578   win->allocation.width = width_request;
5579   win->allocation.height = height_request;
5580   win->allocation.x = 0;
5581   win->allocation.y = 0;
5582
5583   return win;
5584 }
5585
5586 static void
5587 text_window_free (GtkTextWindow *win)
5588 {
5589   if (win->window)
5590     text_window_unrealize (win);
5591
5592   g_free (win);
5593 }
5594
5595 static void
5596 text_window_realize (GtkTextWindow *win,
5597                      GdkWindow     *parent)
5598 {
5599   GdkWindowAttr attributes;
5600   gint attributes_mask;
5601   GdkCursor *cursor;
5602
5603   attributes.window_type = GDK_WINDOW_CHILD;
5604   attributes.x = win->allocation.x;
5605   attributes.y = win->allocation.y;
5606   attributes.width = win->allocation.width;
5607   attributes.height = win->allocation.height;
5608   attributes.wclass = GDK_INPUT_OUTPUT;
5609   attributes.visual = gtk_widget_get_visual (win->widget);
5610   attributes.colormap = gtk_widget_get_colormap (win->widget);
5611   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK;
5612
5613   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
5614
5615   win->window = gdk_window_new (parent,
5616                                 &attributes,
5617                                 attributes_mask);
5618
5619   gdk_window_show (win->window);
5620   gdk_window_set_user_data (win->window, win->widget);
5621
5622   attributes.x = 0;
5623   attributes.y = 0;
5624   attributes.width = win->allocation.width;
5625   attributes.height = win->allocation.height;
5626   attributes.event_mask = (GDK_EXPOSURE_MASK            |
5627                            GDK_SCROLL_MASK              |
5628                            GDK_KEY_PRESS_MASK           |
5629                            GDK_BUTTON_PRESS_MASK        |
5630                            GDK_BUTTON_RELEASE_MASK      |
5631                            GDK_POINTER_MOTION_MASK      |
5632                            GDK_POINTER_MOTION_HINT_MASK |
5633                            gtk_widget_get_events (win->widget));
5634
5635   win->bin_window = gdk_window_new (win->window,
5636                                     &attributes,
5637                                     attributes_mask);
5638
5639   gdk_window_show (win->bin_window);
5640   gdk_window_set_user_data (win->bin_window, win->widget);
5641
5642   if (win->type == GTK_TEXT_WINDOW_TEXT)
5643     {
5644       /* I-beam cursor */
5645       cursor = gdk_cursor_new (GDK_XTERM);
5646       gdk_window_set_cursor (win->bin_window, cursor);
5647       gdk_cursor_destroy (cursor);
5648
5649       gtk_im_context_set_client_window (GTK_TEXT_VIEW (win->widget)->im_context,
5650                                         win->window);
5651
5652
5653       gdk_window_set_background (win->bin_window,
5654                                  &win->widget->style->base[GTK_WIDGET_STATE (win->widget)]);
5655     }
5656   else
5657     {
5658       gdk_window_set_background (win->bin_window,
5659                                  &win->widget->style->bg[GTK_WIDGET_STATE (win->widget)]);
5660     }
5661
5662   g_object_set_qdata (G_OBJECT (win->window),
5663                       g_quark_from_static_string ("gtk-text-view-text-window"),
5664                       win);
5665
5666   g_object_set_qdata (G_OBJECT (win->bin_window),
5667                       g_quark_from_static_string ("gtk-text-view-text-window"),
5668                       win);
5669 }
5670
5671 static void
5672 text_window_unrealize (GtkTextWindow *win)
5673 {
5674   if (win->type == GTK_TEXT_WINDOW_TEXT)
5675     {
5676       gtk_im_context_set_client_window (GTK_TEXT_VIEW (win->widget)->im_context,
5677                                         NULL);
5678     }
5679
5680   gdk_window_set_user_data (win->window, NULL);
5681   gdk_window_set_user_data (win->bin_window, NULL);
5682   gdk_window_destroy (win->bin_window);
5683   gdk_window_destroy (win->window);
5684   win->window = NULL;
5685   win->bin_window = NULL;
5686 }
5687
5688 static void
5689 text_window_size_allocate (GtkTextWindow *win,
5690                            GdkRectangle  *rect)
5691 {
5692   win->allocation = *rect;
5693
5694   if (win->window)
5695     {
5696       gdk_window_move_resize (win->window,
5697                               rect->x, rect->y,
5698                               rect->width, rect->height);
5699
5700       gdk_window_resize (win->bin_window,
5701                          rect->width, rect->height);
5702     }
5703 }
5704
5705 static void
5706 text_window_scroll        (GtkTextWindow *win,
5707                            gint           dx,
5708                            gint           dy)
5709 {
5710   if (dx != 0 || dy != 0)
5711     {
5712       gdk_window_scroll (win->bin_window, dx, dy);
5713     }
5714 }
5715
5716 void
5717 text_window_invalidate_rect (GtkTextWindow *win,
5718                              GdkRectangle  *rect)
5719 {
5720   GdkRectangle window_rect;
5721
5722   gtk_text_view_buffer_to_window_coords (GTK_TEXT_VIEW (win->widget),
5723                                          win->type,
5724                                          rect->x,
5725                                          rect->y,
5726                                          &window_rect.x,
5727                                          &window_rect.y);
5728
5729   window_rect.width = rect->width;
5730   window_rect.height = rect->height;
5731
5732   /* Adjust the rect as appropriate */
5733
5734   switch (win->type)
5735     {
5736     case GTK_TEXT_WINDOW_TEXT:
5737       break;
5738
5739     case GTK_TEXT_WINDOW_LEFT:
5740     case GTK_TEXT_WINDOW_RIGHT:
5741       window_rect.x = 0;
5742       window_rect.width = win->allocation.width;
5743       break;
5744
5745     case GTK_TEXT_WINDOW_TOP:
5746     case GTK_TEXT_WINDOW_BOTTOM:
5747       window_rect.y = 0;
5748       window_rect.height = win->allocation.height;
5749       break;
5750
5751     default:
5752       g_warning ("%s: bug!", G_STRLOC);
5753       return;
5754       break;
5755     }
5756
5757   gdk_window_invalidate_rect (win->bin_window, &window_rect, FALSE);
5758
5759 #if 0
5760   {
5761     GdkColor color = { 0, 65535, 0, 0 };
5762     GdkGC *gc = gdk_gc_new (win->bin_window);
5763     gdk_gc_set_rgb_fg_color (gc, &color);
5764     gdk_draw_rectangle (win->bin_window,
5765                         gc, TRUE, window_rect.x, window_rect.y,
5766                         window_rect.width, window_rect.height);
5767     gdk_gc_unref (gc);
5768   }
5769 #endif
5770 }
5771
5772 static gint
5773 text_window_get_width (GtkTextWindow *win)
5774 {
5775   return win->allocation.width;
5776 }
5777
5778 static gint
5779 text_window_get_height (GtkTextWindow *win)
5780 {
5781   return win->allocation.height;
5782 }
5783
5784 static void
5785 text_window_get_allocation (GtkTextWindow *win,
5786                             GdkRectangle  *rect)
5787 {
5788   *rect = win->allocation;
5789 }
5790
5791 /* Windows */
5792
5793
5794 /**
5795  * gtk_text_view_get_window:
5796  * @text_view: a #GtkTextView
5797  * @win: window to get
5798  *
5799  * Retrieves the #GdkWindow corresponding to an area of the text view;
5800  * possible windows include the overall widget window, child windows
5801  * on the left, right, top, bottom, and the window that displays the
5802  * text buffer. Windows are %NULL and nonexistent if their width or
5803  * height is 0, and are nonexistent before the widget has been
5804  * realized.
5805  *
5806  * Return value: a #GdkWindow, or %NULL
5807  **/
5808 GdkWindow*
5809 gtk_text_view_get_window (GtkTextView *text_view,
5810                           GtkTextWindowType win)
5811 {
5812   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
5813
5814   switch (win)
5815     {
5816     case GTK_TEXT_WINDOW_WIDGET:
5817       return GTK_WIDGET (text_view)->window;
5818       break;
5819
5820     case GTK_TEXT_WINDOW_TEXT:
5821       return text_view->text_window->bin_window;
5822       break;
5823
5824     case GTK_TEXT_WINDOW_LEFT:
5825       if (text_view->left_window)
5826         return text_view->left_window->bin_window;
5827       else
5828         return NULL;
5829       break;
5830
5831     case GTK_TEXT_WINDOW_RIGHT:
5832       if (text_view->right_window)
5833         return text_view->right_window->bin_window;
5834       else
5835         return NULL;
5836       break;
5837
5838     case GTK_TEXT_WINDOW_TOP:
5839       if (text_view->top_window)
5840         return text_view->top_window->bin_window;
5841       else
5842         return NULL;
5843       break;
5844
5845     case GTK_TEXT_WINDOW_BOTTOM:
5846       if (text_view->bottom_window)
5847         return text_view->bottom_window->bin_window;
5848       else
5849         return NULL;
5850       break;
5851
5852     default:
5853       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
5854       return NULL;
5855       break;
5856     }
5857 }
5858
5859 /**
5860  * gtk_text_view_get_window_type:
5861  * @text_view: a #GtkTextView
5862  * @window: a window type
5863  *
5864  * Usually used to find out which window an event corresponds to.
5865  * If you connect to an event signal on @text_view, this function
5866  * should be called on <literal>event-&gt;window</literal> to
5867  * see which window it was.
5868  *
5869  * Return value: the window type.
5870  **/
5871 GtkTextWindowType
5872 gtk_text_view_get_window_type (GtkTextView *text_view,
5873                                GdkWindow   *window)
5874 {
5875   GtkTextWindow *win;
5876
5877   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
5878   g_return_val_if_fail (GDK_IS_WINDOW (window), 0);
5879
5880   if (window == GTK_WIDGET (text_view)->window)
5881     return GTK_TEXT_WINDOW_WIDGET;
5882
5883   win = g_object_get_qdata (G_OBJECT (window),
5884                             g_quark_try_string ("gtk-text-view-text-window"));
5885
5886   if (win)
5887     return win->type;
5888   else
5889     {
5890       return GTK_TEXT_WINDOW_PRIVATE;
5891     }
5892 }
5893
5894 static void
5895 buffer_to_widget (GtkTextView      *text_view,
5896                   gint              buffer_x,
5897                   gint              buffer_y,
5898                   gint             *window_x,
5899                   gint             *window_y)
5900 {
5901   gint focus_edge_width;
5902   gboolean interior_focus;
5903
5904   gtk_widget_style_get (GTK_WIDGET (text_view), "interior_focus", &interior_focus, NULL);
5905
5906   if (interior_focus)
5907     focus_edge_width = 0;
5908   else
5909     focus_edge_width = 1;
5910
5911   if (window_x)
5912     {
5913       *window_x = buffer_x - text_view->xoffset + focus_edge_width;
5914       if (text_view->left_window)
5915         *window_x += text_view->left_window->allocation.width;
5916     }
5917
5918   if (window_y)
5919     {
5920       *window_y = buffer_y - text_view->yoffset + focus_edge_width;
5921       if (text_view->top_window)
5922         *window_y += text_view->top_window->allocation.height;
5923     }
5924 }
5925
5926 static void
5927 widget_to_text_window (GtkTextWindow *win,
5928                        gint           widget_x,
5929                        gint           widget_y,
5930                        gint          *window_x,
5931                        gint          *window_y)
5932 {
5933   if (window_x)
5934     *window_x = widget_x - win->allocation.x;
5935
5936   if (window_y)
5937     *window_y = widget_y - win->allocation.y;
5938 }
5939
5940 static void
5941 buffer_to_text_window (GtkTextView   *text_view,
5942                        GtkTextWindow *win,
5943                        gint           buffer_x,
5944                        gint           buffer_y,
5945                        gint          *window_x,
5946                        gint          *window_y)
5947 {
5948   if (win == NULL)
5949     {
5950       g_warning ("Attempt to convert text buffer coordinates to coordinates "
5951                  "for a nonexistent or private child window of GtkTextView");
5952       return;
5953     }
5954
5955   buffer_to_widget (text_view,
5956                     buffer_x, buffer_y,
5957                     window_x, window_y);
5958
5959   widget_to_text_window (win,
5960                          window_x ? *window_x : 0,
5961                          window_y ? *window_y : 0,
5962                          window_x,
5963                          window_y);
5964 }
5965
5966 /**
5967  * gtk_text_view_buffer_to_window_coords:
5968  * @text_view: a #GtkTextView
5969  * @win: a #GtkTextWindowType
5970  * @buffer_x: buffer x coordinate
5971  * @buffer_y: buffer y coordinate
5972  * @window_x: window x coordinate return location
5973  * @window_y: window y coordinate return location
5974  *
5975  * Converts coordinate (@buffer_x, @buffer_y) to coordinates for the window
5976  * @win, and stores the result in (@window_x, @window_y).
5977  **/
5978 void
5979 gtk_text_view_buffer_to_window_coords (GtkTextView      *text_view,
5980                                        GtkTextWindowType win,
5981                                        gint              buffer_x,
5982                                        gint              buffer_y,
5983                                        gint             *window_x,
5984                                        gint             *window_y)
5985 {
5986   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
5987
5988   switch (win)
5989     {
5990     case GTK_TEXT_WINDOW_WIDGET:
5991       buffer_to_widget (text_view,
5992                         buffer_x, buffer_y,
5993                         window_x, window_y);
5994       break;
5995
5996     case GTK_TEXT_WINDOW_TEXT:
5997       if (window_x)
5998         *window_x = buffer_x - text_view->xoffset;
5999       if (window_y)
6000         *window_y = buffer_y - text_view->yoffset;
6001       break;
6002
6003     case GTK_TEXT_WINDOW_LEFT:
6004       buffer_to_text_window (text_view,
6005                              text_view->left_window,
6006                              buffer_x, buffer_y,
6007                              window_x, window_y);
6008       break;
6009
6010     case GTK_TEXT_WINDOW_RIGHT:
6011       buffer_to_text_window (text_view,
6012                              text_view->right_window,
6013                              buffer_x, buffer_y,
6014                              window_x, window_y);
6015       break;
6016
6017     case GTK_TEXT_WINDOW_TOP:
6018       buffer_to_text_window (text_view,
6019                              text_view->top_window,
6020                              buffer_x, buffer_y,
6021                              window_x, window_y);
6022       break;
6023
6024     case GTK_TEXT_WINDOW_BOTTOM:
6025       buffer_to_text_window (text_view,
6026                              text_view->bottom_window,
6027                              buffer_x, buffer_y,
6028                              window_x, window_y);
6029       break;
6030
6031     case GTK_TEXT_WINDOW_PRIVATE:
6032       g_warning ("%s: can't get coords for private windows", G_STRLOC);
6033       break;
6034
6035     default:
6036       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
6037       break;
6038     }
6039 }
6040
6041 static void
6042 widget_to_buffer (GtkTextView *text_view,
6043                   gint         widget_x,
6044                   gint         widget_y,
6045                   gint        *buffer_x,
6046                   gint        *buffer_y)
6047 {
6048   gint focus_edge_width;
6049   gboolean interior_focus;
6050
6051   gtk_widget_style_get (GTK_WIDGET (text_view), "interior_focus", &interior_focus, NULL);
6052
6053   if (interior_focus)
6054     focus_edge_width = 0;
6055   else
6056     focus_edge_width = 1;
6057
6058   if (buffer_x)
6059     {
6060       *buffer_x = widget_x - focus_edge_width + text_view->xoffset;
6061       if (text_view->left_window)
6062         *buffer_x -= text_view->left_window->allocation.width;
6063     }
6064
6065   if (buffer_y)
6066     {
6067       *buffer_y = widget_y - focus_edge_width + text_view->yoffset;
6068       if (text_view->top_window)
6069         *buffer_y -= text_view->top_window->allocation.height;
6070     }
6071 }
6072
6073 static void
6074 text_window_to_widget (GtkTextWindow *win,
6075                        gint           window_x,
6076                        gint           window_y,
6077                        gint          *widget_x,
6078                        gint          *widget_y)
6079 {
6080   if (widget_x)
6081     *widget_x = window_x + win->allocation.x;
6082
6083   if (widget_y)
6084     *widget_y = window_y + win->allocation.y;
6085 }
6086
6087 static void
6088 text_window_to_buffer (GtkTextView   *text_view,
6089                        GtkTextWindow *win,
6090                        gint           window_x,
6091                        gint           window_y,
6092                        gint          *buffer_x,
6093                        gint          *buffer_y)
6094 {
6095   if (win == NULL)
6096     {
6097       g_warning ("Attempt to convert GtkTextView buffer coordinates into "
6098                  "coordinates for a nonexistent child window.");
6099       return;
6100     }
6101
6102   text_window_to_widget (win,
6103                          window_x,
6104                          window_y,
6105                          buffer_x,
6106                          buffer_y);
6107
6108   widget_to_buffer (text_view,
6109                     buffer_x ? *buffer_x : 0,
6110                     buffer_y ? *buffer_y : 0,
6111                     buffer_x,
6112                     buffer_y);
6113 }
6114
6115 /**
6116  * gtk_text_view_window_to_buffer_coords:
6117  * @text_view: a #GtkTextView
6118  * @win: a #GtkTextWindowType
6119  * @window_x: window x coordinate
6120  * @window_y: window y coordinate
6121  * @buffer_x: buffer x coordinate return location
6122  * @buffer_y: buffer y coordinate return location
6123  *
6124  * Converts coordinates on the window identified by @win to buffer
6125  * coordinates, storing the result in (@buffer_x,@buffer_y).
6126  **/
6127 void
6128 gtk_text_view_window_to_buffer_coords (GtkTextView      *text_view,
6129                                        GtkTextWindowType win,
6130                                        gint              window_x,
6131                                        gint              window_y,
6132                                        gint             *buffer_x,
6133                                        gint             *buffer_y)
6134 {
6135   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6136
6137   switch (win)
6138     {
6139     case GTK_TEXT_WINDOW_WIDGET:
6140       widget_to_buffer (text_view,
6141                         window_x, window_y,
6142                         buffer_x, buffer_y);
6143       break;
6144
6145     case GTK_TEXT_WINDOW_TEXT:
6146       if (buffer_x)
6147         *buffer_x = window_x + text_view->xoffset;
6148       if (buffer_y)
6149         *buffer_y = window_y + text_view->yoffset;
6150       break;
6151
6152     case GTK_TEXT_WINDOW_LEFT:
6153       text_window_to_buffer (text_view,
6154                              text_view->left_window,
6155                              window_x, window_y,
6156                              buffer_x, buffer_y);
6157       break;
6158
6159     case GTK_TEXT_WINDOW_RIGHT:
6160       text_window_to_buffer (text_view,
6161                              text_view->right_window,
6162                              window_x, window_y,
6163                              buffer_x, buffer_y);
6164       break;
6165
6166     case GTK_TEXT_WINDOW_TOP:
6167       text_window_to_buffer (text_view,
6168                              text_view->top_window,
6169                              window_x, window_y,
6170                              buffer_x, buffer_y);
6171       break;
6172
6173     case GTK_TEXT_WINDOW_BOTTOM:
6174       text_window_to_buffer (text_view,
6175                              text_view->bottom_window,
6176                              window_x, window_y,
6177                              buffer_x, buffer_y);
6178       break;
6179
6180     case GTK_TEXT_WINDOW_PRIVATE:
6181       g_warning ("%s: can't get coords for private windows", G_STRLOC);
6182       break;
6183
6184     default:
6185       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
6186       break;
6187     }
6188 }
6189
6190 static void
6191 set_window_width (GtkTextView      *text_view,
6192                   gint              width,
6193                   GtkTextWindowType type,
6194                   GtkTextWindow   **winp)
6195 {
6196   if (width == 0)
6197     {
6198       if (*winp)
6199         {
6200           text_window_free (*winp);
6201           *winp = NULL;
6202           gtk_widget_queue_resize (GTK_WIDGET (text_view));
6203         }
6204     }
6205   else
6206     {
6207       if (*winp == NULL)
6208         {
6209           *winp = text_window_new (type,
6210                                    GTK_WIDGET (text_view),
6211                                    width, 0);
6212           /* if the widget is already realized we need to realize the child manually */
6213           if (GTK_WIDGET_REALIZED (text_view))
6214             text_window_realize (*winp, GTK_WIDGET (text_view)->window);
6215         }
6216       else
6217         {
6218           if ((*winp)->requisition.width == width)
6219             return;
6220         }
6221
6222       gtk_widget_queue_resize (GTK_WIDGET (text_view));
6223     }
6224 }
6225
6226
6227 static void
6228 set_window_height (GtkTextView      *text_view,
6229                    gint              height,
6230                    GtkTextWindowType type,
6231                    GtkTextWindow   **winp)
6232 {
6233   if (height == 0)
6234     {
6235       if (*winp)
6236         {
6237           text_window_free (*winp);
6238           *winp = NULL;
6239           gtk_widget_queue_resize (GTK_WIDGET (text_view));
6240         }
6241     }
6242   else
6243     {
6244       if (*winp == NULL)
6245         {
6246           *winp = text_window_new (type,
6247                                    GTK_WIDGET (text_view),
6248                                    0, height);
6249
6250           /* if the widget is already realized we need to realize the child manually */
6251           if (GTK_WIDGET_REALIZED (text_view))
6252             text_window_realize (*winp, GTK_WIDGET (text_view)->window);
6253         }
6254       else
6255         {
6256           if ((*winp)->requisition.height == height)
6257             return;
6258         }
6259
6260       gtk_widget_queue_resize (GTK_WIDGET (text_view));
6261     }
6262 }
6263
6264 /**
6265  * gtk_text_view_set_border_window_size:
6266  * @text_view: a #GtkTextView
6267  * @type: window to affect
6268  * @size: width or height of the window
6269  *
6270  * Sets the width of %GTK_TEXT_WINDOW_LEFT or %GTK_TEXT_WINDOW_RIGHT,
6271  * or the height of %GTK_TEXT_WINDOW_TOP or %GTK_TEXT_WINDOW_BOTTOM.
6272  * Automatically destroys the corresponding window if the size is set
6273  * to 0, and creates the window if the size is set to non-zero.  This
6274  * function can only be used for the "border windows," it doesn't work
6275  * with #GTK_TEXT_WINDOW_WIDGET, #GTK_TEXT_WINDOW_TEXT, or
6276  * #GTK_TEXT_WINDOW_PRIVATE.
6277  **/
6278 void
6279 gtk_text_view_set_border_window_size (GtkTextView      *text_view,
6280                                       GtkTextWindowType type,
6281                                       gint              size)
6282
6283 {
6284   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6285   g_return_if_fail (size >= 0);
6286
6287   switch (type)
6288     {
6289     case GTK_TEXT_WINDOW_LEFT:
6290       set_window_width (text_view, size, GTK_TEXT_WINDOW_LEFT,
6291                         &text_view->left_window);
6292       break;
6293
6294     case GTK_TEXT_WINDOW_RIGHT:
6295       set_window_width (text_view, size, GTK_TEXT_WINDOW_RIGHT,
6296                         &text_view->right_window);
6297       break;
6298
6299     case GTK_TEXT_WINDOW_TOP:
6300       set_window_height (text_view, size, GTK_TEXT_WINDOW_TOP,
6301                          &text_view->top_window);
6302       break;
6303
6304     case GTK_TEXT_WINDOW_BOTTOM:
6305       set_window_height (text_view, size, GTK_TEXT_WINDOW_BOTTOM,
6306                          &text_view->bottom_window);
6307       break;
6308
6309     default:
6310       g_warning ("Can only set size of left/right/top/bottom border windows with gtk_text_view_set_border_window_size()");
6311       break;
6312     }
6313 }
6314
6315 /**
6316  * gtk_text_view_get_border_window_size:
6317  * @text_view: a #GtkTextView
6318  * @type: window to return size from
6319  *
6320  * Gets the width of the specified border window. See
6321  * gtk_text_view_set_border_window_size().
6322  *
6323  * Return value: width of window
6324  **/
6325 gint
6326 gtk_text_view_get_border_window_size (GtkTextView       *text_view,
6327                                       GtkTextWindowType  type)
6328 {
6329   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
6330
6331   switch (type)
6332     {
6333     case GTK_TEXT_WINDOW_LEFT:
6334       if (text_view->left_window)
6335         return text_view->left_window->requisition.width;
6336
6337     case GTK_TEXT_WINDOW_RIGHT:
6338       if (text_view->right_window)
6339         return text_view->right_window->requisition.width;
6340
6341     case GTK_TEXT_WINDOW_TOP:
6342       if (text_view->top_window)
6343         return text_view->top_window->requisition.height;
6344
6345     case GTK_TEXT_WINDOW_BOTTOM:
6346       if (text_view->bottom_window)
6347         return text_view->bottom_window->requisition.height;
6348
6349     default:
6350       g_warning ("Can only get size of left/right/top/bottom border windows with gtk_text_view_get_border_window_size()");
6351       break;
6352     }
6353
6354   return 0;
6355 }
6356
6357 /*
6358  * Child widgets
6359  */
6360
6361 static GtkTextViewChild*
6362 text_view_child_new_anchored (GtkWidget          *child,
6363                               GtkTextChildAnchor *anchor,
6364                               GtkTextLayout      *layout)
6365 {
6366   GtkTextViewChild *vc;
6367
6368   vc = g_new (GtkTextViewChild, 1);
6369
6370   vc->widget = child;
6371   vc->anchor = anchor;
6372
6373   vc->from_top_of_line = 0;
6374   vc->from_left_of_buffer = 0;
6375
6376   g_object_ref (G_OBJECT (vc->widget));
6377   g_object_ref (G_OBJECT (vc->anchor));
6378
6379   g_object_set_data (G_OBJECT (child),
6380                      "gtk-text-view-child",
6381                      vc);
6382
6383   gtk_text_child_anchor_register_child (anchor, child, layout);
6384
6385   return vc;
6386 }
6387
6388 static GtkTextViewChild*
6389 text_view_child_new_window (GtkWidget          *child,
6390                             GtkTextWindowType   type,
6391                             gint                x,
6392                             gint                y)
6393 {
6394   GtkTextViewChild *vc;
6395
6396   vc = g_new (GtkTextViewChild, 1);
6397
6398   vc->widget = child;
6399   vc->anchor = NULL;
6400
6401   vc->from_top_of_line = 0;
6402   vc->from_left_of_buffer = 0;
6403
6404   g_object_ref (G_OBJECT (vc->widget));
6405
6406   vc->type = type;
6407   vc->x = x;
6408   vc->y = y;
6409
6410   return vc;
6411 }
6412
6413 static void
6414 text_view_child_free (GtkTextViewChild *child)
6415 {
6416   g_object_set_data (G_OBJECT (child->widget),
6417                      "gtk-text-view-child", NULL);
6418
6419   if (child->anchor)
6420     {
6421       gtk_text_child_anchor_unregister_child (child->anchor,
6422                                               child->widget);
6423       g_object_unref (G_OBJECT (child->anchor));
6424     }
6425
6426   g_object_unref (G_OBJECT (child->widget));
6427
6428   g_free (child);
6429 }
6430
6431 static void
6432 text_view_child_set_parent_window (GtkTextView      *text_view,
6433                                    GtkTextViewChild *vc)
6434 {
6435   if (vc->anchor)
6436     gtk_widget_set_parent_window (vc->widget,
6437                                   text_view->text_window->bin_window);
6438   else
6439     {
6440       GdkWindow *window;
6441       window = gtk_text_view_get_window (text_view,
6442                                          vc->type);
6443       gtk_widget_set_parent_window (vc->widget, window);
6444     }
6445 }
6446
6447 static void
6448 add_child (GtkTextView      *text_view,
6449            GtkTextViewChild *vc)
6450 {
6451   text_view->children = g_slist_prepend (text_view->children,
6452                                          vc);
6453
6454   if (GTK_WIDGET_REALIZED (text_view))
6455     text_view_child_set_parent_window (text_view, vc);
6456
6457   gtk_widget_set_parent (vc->widget, GTK_WIDGET (text_view));
6458 }
6459
6460 void
6461 gtk_text_view_add_child_at_anchor (GtkTextView          *text_view,
6462                                    GtkWidget            *child,
6463                                    GtkTextChildAnchor   *anchor)
6464 {
6465   GtkTextViewChild *vc;
6466
6467   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6468   g_return_if_fail (GTK_IS_WIDGET (child));
6469   g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
6470   g_return_if_fail (child->parent == NULL);
6471
6472   gtk_text_view_ensure_layout (text_view);
6473
6474   vc = text_view_child_new_anchored (child, anchor,
6475                                      text_view->layout);
6476
6477   add_child (text_view, vc);
6478 }
6479
6480 void
6481 gtk_text_view_add_child_in_window (GtkTextView          *text_view,
6482                                    GtkWidget            *child,
6483                                    GtkTextWindowType     which_window,
6484                                    gint                  xpos,
6485                                    gint                  ypos)
6486 {
6487   GtkTextViewChild *vc;
6488
6489   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6490   g_return_if_fail (GTK_IS_WIDGET (child));
6491   g_return_if_fail (xpos >= 0);
6492   g_return_if_fail (ypos >= 0);
6493   g_return_if_fail (child->parent == NULL);
6494
6495   vc = text_view_child_new_window (child, which_window,
6496                                    xpos, ypos);
6497
6498   add_child (text_view, vc);
6499 }
6500
6501 void
6502 gtk_text_view_move_child          (GtkTextView          *text_view,
6503                                    GtkWidget            *child,
6504                                    gint                  xpos,
6505                                    gint                  ypos)
6506 {
6507   GtkTextViewChild *vc;
6508
6509   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6510   g_return_if_fail (GTK_IS_WIDGET (child));
6511   g_return_if_fail (xpos >= 0);
6512   g_return_if_fail (ypos >= 0);
6513   g_return_if_fail (child->parent == (GtkWidget*) text_view);
6514
6515   vc = g_object_get_data (G_OBJECT (child),
6516                           "gtk-text-view-child");
6517
6518   g_assert (vc != NULL);
6519
6520   vc->x = xpos;
6521   vc->y = ypos;
6522
6523   if (GTK_WIDGET_VISIBLE (child) && GTK_WIDGET_VISIBLE (text_view))
6524     gtk_widget_queue_resize (child);
6525 }
6526
6527
6528
6529 /* Iterator operations */
6530
6531 gboolean
6532 gtk_text_view_forward_display_line (GtkTextView *text_view,
6533                                     GtkTextIter *iter)
6534 {
6535   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6536   g_return_val_if_fail (iter != NULL, FALSE);
6537
6538   gtk_text_view_ensure_layout (text_view);
6539
6540   return gtk_text_layout_move_iter_to_next_line (text_view->layout, iter);
6541 }
6542
6543 gboolean
6544 gtk_text_view_backward_display_line (GtkTextView *text_view,
6545                                      GtkTextIter *iter)
6546 {
6547   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6548   g_return_val_if_fail (iter != NULL, FALSE);
6549
6550   gtk_text_view_ensure_layout (text_view);
6551
6552   return gtk_text_layout_move_iter_to_previous_line (text_view->layout, iter);
6553 }
6554
6555 gboolean
6556 gtk_text_view_forward_display_line_end (GtkTextView *text_view,
6557                                         GtkTextIter *iter)
6558 {
6559   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6560   g_return_val_if_fail (iter != NULL, FALSE);
6561
6562   gtk_text_view_ensure_layout (text_view);
6563
6564   return gtk_text_layout_move_iter_to_line_end (text_view->layout, iter, 1);
6565 }
6566
6567 gboolean
6568 gtk_text_view_backward_display_line_start (GtkTextView *text_view,
6569                                            GtkTextIter *iter)
6570 {
6571   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6572   g_return_val_if_fail (iter != NULL, FALSE);
6573
6574   gtk_text_view_ensure_layout (text_view);
6575
6576   return gtk_text_layout_move_iter_to_line_end (text_view->layout, iter, -1);
6577 }
6578
6579 gboolean
6580 gtk_text_view_starts_display_line (GtkTextView       *text_view,
6581                                    const GtkTextIter *iter)
6582 {
6583   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6584   g_return_val_if_fail (iter != NULL, FALSE);
6585
6586   gtk_text_view_ensure_layout (text_view);
6587
6588   return gtk_text_layout_iter_starts_line (text_view->layout, iter);
6589 }
6590
6591 gboolean
6592 gtk_text_view_move_visually (GtkTextView *text_view,
6593                              GtkTextIter *iter,
6594                              gint         count)
6595 {
6596   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6597   g_return_val_if_fail (iter != NULL, FALSE);
6598
6599   gtk_text_view_ensure_layout (text_view);
6600
6601   return gtk_text_layout_move_iter_visually (text_view->layout, iter, count);
6602 }