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

   1 /* GTK - The GIMP Toolkit
   2  * gtktextview.c Copyright (C) 2000 Red Hat, Inc.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include <string.h>
  28
  29 #define GTK_TEXT_USE_INTERNAL_UNSUPPORTED_API
  30 #include "gtkbindings.h"
  31 #include "gtkdnd.h"
  32 #include "gtkimagemenuitem.h"
  33 #include "gtkintl.h"
  34 #include "gtkmain.h"
  35 #include "gtkmenu.h"
  36 #include "gtkmenuitem.h"
  37 #include "gtkseparatormenuitem.h"
  38 #include "gtksettings.h"
  39 #include "gtksignal.h"
  40 #include "gtkstock.h"
  41 #include "gtktextdisplay.h"
  42 #include "gtktextview.h"
  43 #include "gtkimmulticontext.h"
  44 #include "gdk/gdkkeysyms.h"
  45 #include <string.h>
  46
  47 /* How scrolling, validation, exposes, etc. work.
  48  *
  49  * The expose_event handler has the invariant that the onscreen lines
  50  * have been validated.
  51  *
  52  * There are two ways that onscreen lines can become invalid. The first
  53  * is to change which lines are onscreen. This happens when the value
  54  * of a scroll adjustment changes. So the code path begins in
  55  * gtk_text_view_value_changed() and goes like this:
  56  *   - gdk_window_scroll() to reflect the new adjustment value
  57  *   - validate the lines that were moved onscreen
  58  *   - gdk_window_process_updates() to handle the exposes immediately
  59  *
  60  * The second way is that you get the "invalidated" signal from the layout,
  61  * indicating that lines have become invalid. This code path begins in
  62  * invalidated_handler() and goes like this:
  63  *   - install high-priority idle which does the rest of the steps
  64  *   - if a scroll is pending from scroll_to_mark(), do the scroll,
  65  *     jumping to the gtk_text_view_value_changed() code path
  66  *   - otherwise, validate the onscreen lines
  67  *   - DO NOT process updates
  68  *
  69  * In both cases, validating the onscreen lines can trigger a scroll
  70  * due to maintaining the first_para on the top of the screen.
  71  * If validation triggers a scroll, we jump to the top of the code path
  72  * for value_changed, and bail out of the current code path.
  73  *
  74  * Also, in size_allocate, if we invalidate some lines from changing
  75  * the layout width, we need to go ahead and run the high-priority idle,
  76  * because GTK sends exposes right after doing the size allocates without
  77  * returning to the main loop. This is also why the high-priority idle
  78  * is at a higher priority than resizing.
  79  *
  80  */
  81
  82 #define SCREEN_WIDTH(widget) text_window_get_width (GTK_TEXT_VIEW (widget)->text_window)
  83 #define SCREEN_HEIGHT(widget) text_window_get_height (GTK_TEXT_VIEW (widget)->text_window)
  84
  85 #if 0
  86 #define DEBUG_VALIDATION_AND_SCROLLING
  87 #endif
  88
  89 #ifdef DEBUG_VALIDATION_AND_SCROLLING
  90 #define DV(x) (x)
  91 #else
  92 #define DV(x)
  93 #endif
  94
  95 struct _GtkTextPendingScroll
  96 {
  97   GtkTextMark   *mark;
  98   gdouble        within_margin;
  99   gboolean       use_align;
 100   gdouble        xalign;
 101   gdouble        yalign;
 102 };
 103
 104 enum
 105 {
 106   SET_SCROLL_ADJUSTMENTS,
 107   POPULATE_POPUP,
 108   MOVE_CURSOR,
 109   SET_ANCHOR,
 110   INSERT_AT_CURSOR,
 111   DELETE_FROM_CURSOR,
 112   CUT_CLIPBOARD,
 113   COPY_CLIPBOARD,
 114   PASTE_CLIPBOARD,
 115   TOGGLE_OVERWRITE,
 116   LAST_SIGNAL
 117 };
 118
 119 enum
 120 {
 121   PROP_0,
 122   PROP_PIXELS_ABOVE_LINES,
 123   PROP_PIXELS_BELOW_LINES,
 124   PROP_PIXELS_INSIDE_WRAP,
 125   PROP_EDITABLE,
 126   PROP_WRAP_MODE,
 127   PROP_JUSTIFICATION,
 128   PROP_LEFT_MARGIN,
 129   PROP_RIGHT_MARGIN,
 130   PROP_INDENT,
 131   PROP_TABS,
 132   PROP_CURSOR_VISIBLE,
 133   LAST_PROP
 134 };
 135
 136 static void gtk_text_view_init                 (GtkTextView      *text_view);
 137 static void gtk_text_view_class_init           (GtkTextViewClass *klass);
 138 static void gtk_text_view_destroy              (GtkObject        *object);
 139 static void gtk_text_view_finalize             (GObject          *object);
 140 static void gtk_text_view_set_property         (GObject         *object,
 141                                                 guint            prop_id,
 142                                                 const GValue    *value,
 143                                                 GParamSpec      *pspec);
 144 static void gtk_text_view_get_property         (GObject         *object,
 145                                                 guint            prop_id,
 146                                                 GValue          *value,
 147                                                 GParamSpec      *pspec);
 148 static void gtk_text_view_size_request         (GtkWidget        *widget,
 149                                                 GtkRequisition   *requisition);
 150 static void gtk_text_view_size_allocate        (GtkWidget        *widget,
 151                                                 GtkAllocation    *allocation);
 152 static void gtk_text_view_realize              (GtkWidget        *widget);
 153 static void gtk_text_view_unrealize            (GtkWidget        *widget);
 154 static void gtk_text_view_style_set            (GtkWidget        *widget,
 155                                                 GtkStyle         *previous_style);
 156 static void gtk_text_view_direction_changed    (GtkWidget        *widget,
 157                                                 GtkTextDirection  previous_direction);
 158 static gint gtk_text_view_event                (GtkWidget        *widget,
 159                                                 GdkEvent         *event);
 160 static gint gtk_text_view_key_press_event      (GtkWidget        *widget,
 161                                                 GdkEventKey      *event);
 162 static gint gtk_text_view_key_release_event    (GtkWidget        *widget,
 163                                                 GdkEventKey      *event);
 164 static gint gtk_text_view_button_press_event   (GtkWidget        *widget,
 165                                                 GdkEventButton   *event);
 166 static gint gtk_text_view_button_release_event (GtkWidget        *widget,
 167                                                 GdkEventButton   *event);
 168 static gint gtk_text_view_focus_in_event       (GtkWidget        *widget,
 169                                                 GdkEventFocus    *event);
 170 static gint gtk_text_view_focus_out_event      (GtkWidget        *widget,
 171                                                 GdkEventFocus    *event);
 172 static gint gtk_text_view_motion_event         (GtkWidget        *widget,
 173                                                 GdkEventMotion   *event);
 174 static gint gtk_text_view_expose_event         (GtkWidget        *widget,
 175                                                 GdkEventExpose   *expose);
 176 static void gtk_text_view_draw_focus           (GtkWidget        *widget);
 177 static void gtk_text_view_grab_focus           (GtkWidget        *widget);
 178
 179 /* Source side drag signals */
 180 static void gtk_text_view_drag_begin       (GtkWidget        *widget,
 181                                             GdkDragContext   *context);
 182 static void gtk_text_view_drag_end         (GtkWidget        *widget,
 183                                             GdkDragContext   *context);
 184 static void gtk_text_view_drag_data_get    (GtkWidget        *widget,
 185                                             GdkDragContext   *context,
 186                                             GtkSelectionData *selection_data,
 187                                             guint             info,
 188                                             guint             time);
 189 static void gtk_text_view_drag_data_delete (GtkWidget        *widget,
 190                                             GdkDragContext   *context);
 191
 192 /* Target side drag signals */
 193 static void     gtk_text_view_drag_leave         (GtkWidget        *widget,
 194                                                   GdkDragContext   *context,
 195                                                   guint             time);
 196 static gboolean gtk_text_view_drag_motion        (GtkWidget        *widget,
 197                                                   GdkDragContext   *context,
 198                                                   gint              x,
 199                                                   gint              y,
 200                                                   guint             time);
 201 static gboolean gtk_text_view_drag_drop          (GtkWidget        *widget,
 202                                                   GdkDragContext   *context,
 203                                                   gint              x,
 204                                                   gint              y,
 205                                                   guint             time);
 206 static void     gtk_text_view_drag_data_received (GtkWidget        *widget,
 207                                                   GdkDragContext   *context,
 208                                                   gint              x,
 209                                                   gint              y,
 210                                                   GtkSelectionData *selection_data,
 211                                                   guint             info,
 212                                                   guint             time);
 213
 214 static void gtk_text_view_set_scroll_adjustments (GtkTextView   *text_view,
 215                                                   GtkAdjustment *hadj,
 216                                                   GtkAdjustment *vadj);
 217 static void gtk_text_view_popup_menu             (GtkWidget     *widget);
 218
 219 static void gtk_text_view_move_cursor      (GtkTextView           *text_view,
 220                                             GtkMovementStep        step,
 221                                             gint                   count,
 222                                             gboolean               extend_selection);
 223 static void gtk_text_view_set_anchor       (GtkTextView           *text_view);
 224 static void gtk_text_view_scroll_pages     (GtkTextView           *text_view,
 225                                             gint                   count);
 226 static void gtk_text_view_insert_at_cursor (GtkTextView           *text_view,
 227                                             const gchar           *str);
 228 static void gtk_text_view_delete_from_cursor (GtkTextView           *text_view,
 229                                               GtkDeleteType          type,
 230                                               gint                   count);
 231 static void gtk_text_view_cut_clipboard    (GtkTextView           *text_view);
 232 static void gtk_text_view_copy_clipboard   (GtkTextView           *text_view);
 233 static void gtk_text_view_paste_clipboard  (GtkTextView           *text_view);
 234 static void gtk_text_view_toggle_overwrite (GtkTextView           *text_view);
 235 static void gtk_text_view_unselect         (GtkTextView           *text_view);
 236
 237 static void     gtk_text_view_validate_onscreen     (GtkTextView        *text_view);
 238 static void     gtk_text_view_get_first_para_iter   (GtkTextView        *text_view,
 239                                                      GtkTextIter        *iter);
 240 static void     gtk_text_view_update_layout_width       (GtkTextView        *text_view);
 241 static void     gtk_text_view_set_attributes_from_style (GtkTextView        *text_view,
 242                                                          GtkTextAttributes *values,
 243                                                          GtkStyle           *style);
 244 static void     gtk_text_view_ensure_layout          (GtkTextView        *text_view);
 245 static void     gtk_text_view_destroy_layout         (GtkTextView        *text_view);
 246 static void     gtk_text_view_check_keymap_direction (GtkTextView        *text_view);
 247 static void     gtk_text_view_reset_im_context       (GtkTextView        *text_view);
 248 static void     gtk_text_view_start_selection_drag   (GtkTextView        *text_view,
 249                                                       const GtkTextIter  *iter,
 250                                                       GdkEventButton     *event);
 251 static gboolean gtk_text_view_end_selection_drag     (GtkTextView        *text_view,
 252                                                       GdkEventButton     *event);
 253 static void     gtk_text_view_start_selection_dnd    (GtkTextView        *text_view,
 254                                                       const GtkTextIter  *iter,
 255                                                       GdkEventMotion     *event);
 256 static void     gtk_text_view_check_cursor_blink     (GtkTextView        *text_view);
 257 static void     gtk_text_view_pend_cursor_blink      (GtkTextView        *text_view);
 258 static void     gtk_text_view_stop_cursor_blink      (GtkTextView        *text_view);
 259
 260 static void gtk_text_view_value_changed           (GtkAdjustment *adj,
 261                                                    GtkTextView   *view);
 262 static void gtk_text_view_commit_handler          (GtkIMContext  *context,
 263                                                    const gchar   *str,
 264                                                    GtkTextView   *text_view);
 265 static void gtk_text_view_preedit_changed_handler (GtkIMContext  *context,
 266                                                    GtkTextView   *text_view);
 267
 268 static void gtk_text_view_mark_set_handler       (GtkTextBuffer     *buffer,
 269                                                   const GtkTextIter *location,
 270                                                   GtkTextMark       *mark,
 271                                                   gpointer           data);
 272 static void gtk_text_view_get_virtual_cursor_pos (GtkTextView       *text_view,
 273                                                   gint              *x,
 274                                                   gint              *y);
 275 static void gtk_text_view_set_virtual_cursor_pos (GtkTextView       *text_view,
 276                                                   gint               x,
 277                                                   gint               y);
 278
 279 static GtkAdjustment* get_hadjustment            (GtkTextView       *text_view);
 280 static GtkAdjustment* get_vadjustment            (GtkTextView       *text_view);
 281
 282 static void gtk_text_view_do_popup               (GtkTextView       *text_view,
 283                                                   GdkEventButton    *event);
 284
 285 static void gtk_text_view_queue_scroll           (GtkTextView   *text_view,
 286                                                   GtkTextMark   *mark,
 287                                                   gdouble        within_margin,
 288                                                   gboolean       use_align,
 289                                                   gdouble        xalign,
 290                                                   gdouble        yalign);
 291
 292 static gboolean gtk_text_view_flush_scroll       (GtkTextView *text_view);
 293 static void     gtk_text_view_update_adjustments (GtkTextView *text_view);
 294
 295 static void gtk_text_view_update_im_spot_location (GtkTextView *text_view);
 296
 297 /* Container methods */
 298 static void gtk_text_view_add    (GtkContainer *container,
 299                                   GtkWidget    *child);
 300 static void gtk_text_view_remove (GtkContainer *container,
 301                                   GtkWidget    *child);
 302 static void gtk_text_view_forall (GtkContainer *container,
 303                                   gboolean      include_internals,
 304                                   GtkCallback   callback,
 305                                   gpointer      callback_data);
 306
 307 /* FIXME probably need the focus methods. */
 308
 309 typedef struct _GtkTextViewChild GtkTextViewChild;
 310
 311 struct _GtkTextViewChild
 312 {
 313   GtkWidget *widget;
 314
 315   GtkTextChildAnchor *anchor;
 316
 317   gint from_top_of_line;
 318   gint from_left_of_buffer;
 319
 320   /* These are ignored if anchor != NULL */
 321   GtkTextWindowType type;
 322   gint x;
 323   gint y;
 324 };
 325
 326 static GtkTextViewChild* text_view_child_new_anchored      (GtkWidget          *child,
 327                                                             GtkTextChildAnchor *anchor,
 328                                                             GtkTextLayout      *layout);
 329 static GtkTextViewChild* text_view_child_new_window        (GtkWidget          *child,
 330                                                             GtkTextWindowType   type,
 331                                                             gint                x,
 332                                                             gint                y);
 333 static void              text_view_child_free              (GtkTextViewChild   *child);
 334 static void              text_view_child_set_parent_window (GtkTextView        *text_view,
 335                                                             GtkTextViewChild   *child);
 336
 337 struct _GtkTextWindow
 338 {
 339   GtkTextWindowType type;
 340   GtkWidget *widget;
 341   GdkWindow *window;
 342   GdkWindow *bin_window;
 343   GtkRequisition requisition;
 344   GdkRectangle allocation;
 345 };
 346
 347 static GtkTextWindow *text_window_new             (GtkTextWindowType  type,
 348                                                    GtkWidget         *widget,
 349                                                    gint               width_request,
 350                                                    gint               height_request);
 351 static void           text_window_free            (GtkTextWindow     *win);
 352 static void           text_window_realize         (GtkTextWindow     *win,
 353                                                    GdkWindow         *parent);
 354 static void           text_window_unrealize       (GtkTextWindow     *win);
 355 static void           text_window_size_allocate   (GtkTextWindow     *win,
 356                                                    GdkRectangle      *rect);
 357 static void           text_window_scroll          (GtkTextWindow     *win,
 358                                                    gint               dx,
 359                                                    gint               dy);
 360 static void           text_window_invalidate_rect (GtkTextWindow     *win,
 361                                                    GdkRectangle      *rect);
 362
 363 static gint           text_window_get_width       (GtkTextWindow     *win);
 364 static gint           text_window_get_height      (GtkTextWindow     *win);
 365 static void           text_window_get_allocation  (GtkTextWindow     *win,
 366                                                    GdkRectangle      *rect);
 367
 368
 369 enum
 370 {
 371   TARGET_STRING,
 372   TARGET_TEXT,
 373   TARGET_COMPOUND_TEXT,
 374   TARGET_UTF8_STRING,
 375   TARGET_TEXT_BUFFER_CONTENTS
 376 };
 377
 378 static GtkTargetEntry target_table[] = {
 379   { "GTK_TEXT_BUFFER_CONTENTS", GTK_TARGET_SAME_APP,
 380     TARGET_TEXT_BUFFER_CONTENTS },
 381   { "UTF8_STRING", 0, TARGET_UTF8_STRING },
 382   { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
 383   { "TEXT", 0, TARGET_TEXT },
 384   { "text/plain", 0, TARGET_STRING },
 385   { "STRING",     0, TARGET_STRING }
 386 };
 387
 388 static GtkContainerClass *parent_class = NULL;
 389 static guint signals[LAST_SIGNAL] = { 0 };
 390
 391 GtkType
 392 gtk_text_view_get_type (void)
 393 {
 394   static GtkType our_type = 0;
 395
 396   if (our_type == 0)
 397     {
 398       static const GtkTypeInfo our_info =
 399       {
 400         "GtkTextView",
 401         sizeof (GtkTextView),
 402         sizeof (GtkTextViewClass),
 403         (GtkClassInitFunc) gtk_text_view_class_init,
 404         (GtkObjectInitFunc) gtk_text_view_init,
 405         /* reserved_1 */ NULL,
 406         /* reserved_2 */ NULL,
 407         (GtkClassInitFunc) NULL
 408       };
 409
 410       our_type = gtk_type_unique (GTK_TYPE_CONTAINER, &our_info);
 411     }
 412
 413   return our_type;
 414 }
 415
 416 static void
 417 add_move_binding (GtkBindingSet  *binding_set,
 418                   guint           keyval,
 419                   guint           modmask,
 420                   GtkMovementStep step,
 421                   gint            count)
 422 {
 423   g_return_if_fail ((modmask & GDK_SHIFT_MASK) == 0);
 424
 425   gtk_binding_entry_add_signal (binding_set, keyval, modmask,
 426                                 "move_cursor", 3,
 427                                 GTK_TYPE_ENUM, step,
 428                                 GTK_TYPE_INT, count,
 429                                 GTK_TYPE_BOOL, FALSE);
 430
 431   /* Selection-extending version */
 432   gtk_binding_entry_add_signal (binding_set, keyval, modmask | GDK_SHIFT_MASK,
 433                                 "move_cursor", 3,
 434                                 GTK_TYPE_ENUM, step,
 435                                 GTK_TYPE_INT, count,
 436                                 GTK_TYPE_BOOL, TRUE);
 437 }
 438
 439 static void
 440 gtk_text_view_class_init (GtkTextViewClass *klass)
 441 {
 442   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 443   GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass);
 444   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 445   GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
 446   GtkBindingSet *binding_set;
 447
 448   parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
 449
 450   /* Default handlers and virtual methods
 451    */
 452   gobject_class->set_property = gtk_text_view_set_property;
 453   gobject_class->get_property = gtk_text_view_get_property;
 454
 455   object_class->destroy = gtk_text_view_destroy;
 456   gobject_class->finalize = gtk_text_view_finalize;
 457
 458   widget_class->realize = gtk_text_view_realize;
 459   widget_class->unrealize = gtk_text_view_unrealize;
 460   widget_class->style_set = gtk_text_view_style_set;
 461   widget_class->direction_changed = gtk_text_view_direction_changed;
 462   widget_class->size_request = gtk_text_view_size_request;
 463   widget_class->size_allocate = gtk_text_view_size_allocate;
 464   widget_class->event = gtk_text_view_event;
 465   widget_class->key_press_event = gtk_text_view_key_press_event;
 466   widget_class->key_release_event = gtk_text_view_key_release_event;
 467   widget_class->button_press_event = gtk_text_view_button_press_event;
 468   widget_class->button_release_event = gtk_text_view_button_release_event;
 469   widget_class->focus_in_event = gtk_text_view_focus_in_event;
 470   widget_class->focus_out_event = gtk_text_view_focus_out_event;
 471   widget_class->motion_notify_event = gtk_text_view_motion_event;
 472   widget_class->expose_event = gtk_text_view_expose_event;
 473   widget_class->grab_focus = gtk_text_view_grab_focus;
 474
 475   widget_class->drag_begin = gtk_text_view_drag_begin;
 476   widget_class->drag_end = gtk_text_view_drag_end;
 477   widget_class->drag_data_get = gtk_text_view_drag_data_get;
 478   widget_class->drag_data_delete = gtk_text_view_drag_data_delete;
 479
 480   widget_class->drag_leave = gtk_text_view_drag_leave;
 481   widget_class->drag_motion = gtk_text_view_drag_motion;
 482   widget_class->drag_drop = gtk_text_view_drag_drop;
 483   widget_class->drag_data_received = gtk_text_view_drag_data_received;
 484
 485   widget_class->popup_menu = gtk_text_view_popup_menu;
 486
 487   container_class->add = gtk_text_view_add;
 488   container_class->remove = gtk_text_view_remove;
 489   container_class->forall = gtk_text_view_forall;
 490
 491   klass->move_cursor = gtk_text_view_move_cursor;
 492   klass->set_anchor = gtk_text_view_set_anchor;
 493   klass->insert_at_cursor = gtk_text_view_insert_at_cursor;
 494   klass->delete_from_cursor = gtk_text_view_delete_from_cursor;
 495   klass->cut_clipboard = gtk_text_view_cut_clipboard;
 496   klass->copy_clipboard = gtk_text_view_copy_clipboard;
 497   klass->paste_clipboard = gtk_text_view_paste_clipboard;
 498   klass->toggle_overwrite = gtk_text_view_toggle_overwrite;
 499   klass->set_scroll_adjustments = gtk_text_view_set_scroll_adjustments;
 500
 501   /*
 502    * Properties
 503    */
 504
 505   g_object_class_install_property (gobject_class,
 506                                    PROP_PIXELS_ABOVE_LINES,
 507                                    g_param_spec_int ("pixels_above_lines",
 508                                                      _("Pixels Above Lines"),
 509                                                      _("Pixels of blank space above paragraphs"),
 510                                                      0,
 511                                                      G_MAXINT,
 512                                                      0,
 513                                                      G_PARAM_READWRITE));
 514
 515   g_object_class_install_property (gobject_class,
 516                                    PROP_PIXELS_BELOW_LINES,
 517                                    g_param_spec_int ("pixels_below_lines",
 518                                                      _("Pixels Below Lines"),
 519                                                      _("Pixels of blank space below paragraphs"),
 520                                                      0,
 521                                                      G_MAXINT,
 522                                                      0,
 523                                                      G_PARAM_READWRITE));
 524
 525   g_object_class_install_property (gobject_class,
 526                                    PROP_PIXELS_INSIDE_WRAP,
 527                                    g_param_spec_int ("pixels_inside_wrap",
 528                                                      _("Pixels Inside Wrap"),
 529                                                      _("Pixels of blank space between wrapped lines in a paragraph"),
 530                                                      0,
 531                                                      G_MAXINT,
 532                                                      0,
 533                                                      G_PARAM_READWRITE));
 534
 535   g_object_class_install_property (gobject_class,
 536                                    PROP_EDITABLE,
 537                                    g_param_spec_boolean ("editable",
 538                                                          _("Editable"),
 539                                                          _("Whether the text can be modified by the user"),
 540                                                          TRUE,
 541                                                          G_PARAM_READWRITE));
 542
 543   g_object_class_install_property (gobject_class,
 544                                    PROP_WRAP_MODE,
 545                                    g_param_spec_enum ("wrap_mode",
 546                                                       _("Wrap Mode"),
 547                                                       _("Whether to wrap lines never, at word boundaries, or at character boundaries"),
 548                                                       GTK_TYPE_WRAP_MODE,
 549                                                       GTK_WRAP_NONE,
 550                                                       G_PARAM_READWRITE));
 551
 552   g_object_class_install_property (gobject_class,
 553                                    PROP_JUSTIFICATION,
 554                                    g_param_spec_enum ("justification",
 555                                                       _("Justification"),
 556                                                       _("Left, right, or center justification"),
 557                                                       GTK_TYPE_JUSTIFICATION,
 558                                                       GTK_JUSTIFY_LEFT,
 559                                                       G_PARAM_READWRITE));
 560
 561   g_object_class_install_property (gobject_class,
 562                                    PROP_LEFT_MARGIN,
 563                                    g_param_spec_int ("left_margin",
 564                                                      _("Left Margin"),
 565                                                      _("Width of the left margin in pixels"),
 566                                                      0,
 567                                                      G_MAXINT,
 568                                                      0,
 569                                                      G_PARAM_READWRITE));
 570
 571   g_object_class_install_property (gobject_class,
 572                                    PROP_RIGHT_MARGIN,
 573                                    g_param_spec_int ("right_margin",
 574                                                      _("Right Margin"),
 575                                                      _("Width of the right margin in pixels"),
 576                                                      0,
 577                                                      G_MAXINT,
 578                                                      0,
 579                                                      G_PARAM_READWRITE));
 580
 581   g_object_class_install_property (gobject_class,
 582                                    PROP_INDENT,
 583                                    g_param_spec_int ("indent",
 584                                                      _("Indent"),
 585                                                      _("Amount to indent the paragraph, in pixels"),
 586                                                      0,
 587                                                      G_MAXINT,
 588                                                      0,
 589                                                      G_PARAM_READWRITE));
 590
 591   g_object_class_install_property (gobject_class,
 592                                    PROP_TABS,
 593                                    g_param_spec_boxed ("tabs",
 594                                                        _("Tabs"),
 595                                                        _("Custom tabs for this text"),
 596                                                        PANGO_TYPE_TAB_ARRAY,
 597                                                        G_PARAM_READWRITE));
 598
 599   g_object_class_install_property (gobject_class,
 600                                    PROP_CURSOR_VISIBLE,
 601                                    g_param_spec_boolean ("cursor_visible",
 602                                                          _("Cursor Visible"),
 603                                                          _("If the insertion cursor is shown"),
 604                                                          TRUE,
 605                                                          G_PARAM_READWRITE));
 606
 607
 608   /*
 609    * Style properties
 610    */
 611
 612   gtk_widget_class_install_style_property (widget_class,
 613                                            g_param_spec_boxed ("cursor_color",
 614                                                                _("Cursor color"),
 615                                                                _("Color with which to draw insertion cursor"),
 616                                                                GDK_TYPE_COLOR,
 617                                                                G_PARAM_READABLE));
 618
 619
 620   /*
 621    * Signals
 622    */
 623
 624   signals[MOVE_CURSOR] =
 625     gtk_signal_new ("move_cursor",
 626                     GTK_RUN_LAST | GTK_RUN_ACTION,
 627                     GTK_CLASS_TYPE (object_class),
 628                     GTK_SIGNAL_OFFSET (GtkTextViewClass, move_cursor),
 629                     gtk_marshal_VOID__ENUM_INT_BOOLEAN,
 630                     GTK_TYPE_NONE, 3, GTK_TYPE_MOVEMENT_STEP, GTK_TYPE_INT, GTK_TYPE_BOOL);
 631
 632   signals[SET_ANCHOR] =
 633     gtk_signal_new ("set_anchor",
 634                     GTK_RUN_LAST | GTK_RUN_ACTION,
 635                     GTK_CLASS_TYPE (object_class),
 636                     GTK_SIGNAL_OFFSET (GtkTextViewClass, set_anchor),
 637                     gtk_marshal_VOID__VOID,
 638                     GTK_TYPE_NONE, 0);
 639
 640   signals[INSERT_AT_CURSOR] =
 641     gtk_signal_new ("insert_at_cursor",
 642                     GTK_RUN_LAST | GTK_RUN_ACTION,
 643                     GTK_CLASS_TYPE (object_class),
 644                     GTK_SIGNAL_OFFSET (GtkTextViewClass, insert_at_cursor),
 645                     gtk_marshal_VOID__STRING,
 646                     GTK_TYPE_NONE, 1, GTK_TYPE_STRING);
 647
 648   signals[DELETE_FROM_CURSOR] =
 649     gtk_signal_new ("delete_from_cursor",
 650                     GTK_RUN_LAST | GTK_RUN_ACTION,
 651                     GTK_CLASS_TYPE (object_class),
 652                     GTK_SIGNAL_OFFSET (GtkTextViewClass, delete_from_cursor),
 653                     gtk_marshal_VOID__ENUM_INT,
 654                     GTK_TYPE_NONE, 2, GTK_TYPE_DELETE_TYPE, GTK_TYPE_INT);
 655
 656   signals[CUT_CLIPBOARD] =
 657     gtk_signal_new ("cut_clipboard",
 658                     GTK_RUN_LAST | GTK_RUN_ACTION,
 659                     GTK_CLASS_TYPE (object_class),
 660                     GTK_SIGNAL_OFFSET (GtkTextViewClass, cut_clipboard),
 661                     gtk_marshal_VOID__VOID,
 662                     GTK_TYPE_NONE, 0);
 663
 664   signals[COPY_CLIPBOARD] =
 665     gtk_signal_new ("copy_clipboard",
 666                     GTK_RUN_LAST | GTK_RUN_ACTION,
 667                     GTK_CLASS_TYPE (object_class),
 668                     GTK_SIGNAL_OFFSET (GtkTextViewClass, copy_clipboard),
 669                     gtk_marshal_VOID__VOID,
 670                     GTK_TYPE_NONE, 0);
 671
 672   signals[PASTE_CLIPBOARD] =
 673     gtk_signal_new ("paste_clipboard",
 674                     GTK_RUN_LAST | GTK_RUN_ACTION,
 675                     GTK_CLASS_TYPE (object_class),
 676                     GTK_SIGNAL_OFFSET (GtkTextViewClass, paste_clipboard),
 677                     gtk_marshal_VOID__VOID,
 678                     GTK_TYPE_NONE, 0);
 679
 680   signals[TOGGLE_OVERWRITE] =
 681     gtk_signal_new ("toggle_overwrite",
 682                     GTK_RUN_LAST | GTK_RUN_ACTION,
 683                     GTK_CLASS_TYPE (object_class),
 684                     GTK_SIGNAL_OFFSET (GtkTextViewClass, toggle_overwrite),
 685                     gtk_marshal_VOID__VOID,
 686                     GTK_TYPE_NONE, 0);
 687
 688   signals[SET_SCROLL_ADJUSTMENTS] =
 689     gtk_signal_new ("set_scroll_adjustments",
 690                     GTK_RUN_LAST,
 691                     GTK_CLASS_TYPE (object_class),
 692                     GTK_SIGNAL_OFFSET (GtkTextViewClass, set_scroll_adjustments),
 693                     gtk_marshal_VOID__OBJECT_OBJECT,
 694                     GTK_TYPE_NONE, 2, GTK_TYPE_ADJUSTMENT, GTK_TYPE_ADJUSTMENT);
 695   widget_class->set_scroll_adjustments_signal = signals[SET_SCROLL_ADJUSTMENTS];
 696
 697   signals[POPULATE_POPUP] =
 698     gtk_signal_new ("populate_popup",
 699                     GTK_RUN_LAST,
 700                     GTK_CLASS_TYPE (object_class),
 701                     GTK_SIGNAL_OFFSET (GtkTextViewClass, populate_popup),
 702                     gtk_marshal_VOID__OBJECT,
 703                     GTK_TYPE_NONE, 1, GTK_TYPE_MENU);
 704
 705   /*
 706    * Key bindings
 707    */
 708
 709   binding_set = gtk_binding_set_by_class (klass);
 710
 711   /* Moving the insertion point */
 712   add_move_binding (binding_set, GDK_Right, 0,
 713                     GTK_MOVEMENT_VISUAL_POSITIONS, 1);
 714
 715   add_move_binding (binding_set, GDK_KP_Right, 0,
 716                     GTK_MOVEMENT_VISUAL_POSITIONS, 1);
 717
 718   add_move_binding (binding_set, GDK_Left, 0,
 719                     GTK_MOVEMENT_VISUAL_POSITIONS, -1);
 720
 721   add_move_binding (binding_set, GDK_KP_Left, 0,
 722                     GTK_MOVEMENT_VISUAL_POSITIONS, -1);
 723
 724   add_move_binding (binding_set, GDK_f, GDK_CONTROL_MASK,
 725                     GTK_MOVEMENT_LOGICAL_POSITIONS, 1);
 726
 727   add_move_binding (binding_set, GDK_b, GDK_CONTROL_MASK,
 728                     GTK_MOVEMENT_LOGICAL_POSITIONS, -1);
 729
 730   add_move_binding (binding_set, GDK_Right, GDK_CONTROL_MASK,
 731                     GTK_MOVEMENT_WORDS, 1);
 732
 733   add_move_binding (binding_set, GDK_KP_Right, GDK_CONTROL_MASK,
 734                     GTK_MOVEMENT_WORDS, 1);
 735
 736   add_move_binding (binding_set, GDK_Left, GDK_CONTROL_MASK,
 737                     GTK_MOVEMENT_WORDS, -1);
 738
 739   add_move_binding (binding_set, GDK_KP_Left, GDK_CONTROL_MASK,
 740                     GTK_MOVEMENT_WORDS, 1);
 741
 742   /* Eventually we want to move by display lines, not paragraphs */
 743   add_move_binding (binding_set, GDK_Up, 0,
 744                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 745
 746   add_move_binding (binding_set, GDK_KP_Up, 0,
 747                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 748
 749   add_move_binding (binding_set, GDK_Down, 0,
 750                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 751
 752   add_move_binding (binding_set, GDK_KP_Down, 0,
 753                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 754
 755   add_move_binding (binding_set, GDK_p, GDK_CONTROL_MASK,
 756                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 757
 758   add_move_binding (binding_set, GDK_n, GDK_CONTROL_MASK,
 759                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 760
 761   add_move_binding (binding_set, GDK_Up, GDK_CONTROL_MASK,
 762                     GTK_MOVEMENT_PARAGRAPHS, -1);
 763
 764   add_move_binding (binding_set, GDK_KP_Up, GDK_CONTROL_MASK,
 765                     GTK_MOVEMENT_PARAGRAPHS, -1);
 766
 767   add_move_binding (binding_set, GDK_Down, GDK_CONTROL_MASK,
 768                     GTK_MOVEMENT_PARAGRAPHS, 1);
 769
 770   add_move_binding (binding_set, GDK_KP_Down, GDK_CONTROL_MASK,
 771                     GTK_MOVEMENT_PARAGRAPHS, 1);
 772
 773   add_move_binding (binding_set, GDK_a, GDK_CONTROL_MASK,
 774                     GTK_MOVEMENT_PARAGRAPH_ENDS, -1);
 775
 776   add_move_binding (binding_set, GDK_e, GDK_CONTROL_MASK,
 777                     GTK_MOVEMENT_PARAGRAPH_ENDS, 1);
 778
 779   add_move_binding (binding_set, GDK_f, GDK_MOD1_MASK,
 780                     GTK_MOVEMENT_WORDS, 1);
 781
 782   add_move_binding (binding_set, GDK_b, GDK_MOD1_MASK,
 783                     GTK_MOVEMENT_WORDS, -1);
 784
 785   add_move_binding (binding_set, GDK_Home, 0,
 786                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
 787
 788   add_move_binding (binding_set, GDK_KP_Home, 0,
 789                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
 790
 791   add_move_binding (binding_set, GDK_End, 0,
 792                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
 793
 794   add_move_binding (binding_set, GDK_KP_End, 0,
 795                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
 796
 797   add_move_binding (binding_set, GDK_Home, GDK_CONTROL_MASK,
 798                     GTK_MOVEMENT_BUFFER_ENDS, -1);
 799
 800   add_move_binding (binding_set, GDK_KP_Home, GDK_CONTROL_MASK,
 801                     GTK_MOVEMENT_BUFFER_ENDS, -1);
 802
 803   add_move_binding (binding_set, GDK_End, GDK_CONTROL_MASK,
 804                     GTK_MOVEMENT_BUFFER_ENDS, 1);
 805
 806   add_move_binding (binding_set, GDK_KP_End, GDK_CONTROL_MASK,
 807                     GTK_MOVEMENT_BUFFER_ENDS, 1);
 808
 809   add_move_binding (binding_set, GDK_Page_Up, 0,
 810                     GTK_MOVEMENT_PAGES, -1);
 811
 812   add_move_binding (binding_set, GDK_KP_Page_Up, 0,
 813                     GTK_MOVEMENT_PAGES, -1);
 814
 815   add_move_binding (binding_set, GDK_Page_Down, 0,
 816                     GTK_MOVEMENT_PAGES, 1);
 817
 818   add_move_binding (binding_set, GDK_KP_Page_Down, 0,
 819                     GTK_MOVEMENT_PAGES, 1);
 820
 821   /* Setting the cut/paste/copy anchor */
 822   gtk_binding_entry_add_signal (binding_set, GDK_space, GDK_CONTROL_MASK,
 823                                 "set_anchor", 0);
 824   gtk_binding_entry_add_signal (binding_set, GDK_KP_Space, GDK_CONTROL_MASK,
 825                                 "set_anchor", 0);
 826
 827   /* Deleting text */
 828   gtk_binding_entry_add_signal (binding_set, GDK_Delete, 0,
 829                                 "delete_from_cursor", 2,
 830                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 831                                 GTK_TYPE_INT, 1);
 832
 833   gtk_binding_entry_add_signal (binding_set, GDK_KP_Delete, 0,
 834                                 "delete_from_cursor", 2,
 835                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 836                                 GTK_TYPE_INT, 1);
 837
 838   gtk_binding_entry_add_signal (binding_set, GDK_d, GDK_CONTROL_MASK,
 839                                 "delete_from_cursor", 2,
 840                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 841                                 GTK_TYPE_INT, 1);
 842
 843   gtk_binding_entry_add_signal (binding_set, GDK_BackSpace, 0,
 844                                 "delete_from_cursor", 2,
 845                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 846                                 GTK_TYPE_INT, -1);
 847
 848   gtk_binding_entry_add_signal (binding_set, GDK_Delete, GDK_CONTROL_MASK,
 849                                 "delete_from_cursor", 2,
 850                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 851                                 GTK_TYPE_INT, 1);
 852
 853   gtk_binding_entry_add_signal (binding_set, GDK_KP_Delete, GDK_CONTROL_MASK,
 854                                 "delete_from_cursor", 2,
 855                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 856                                 GTK_TYPE_INT, 1);
 857
 858   gtk_binding_entry_add_signal (binding_set, GDK_d, GDK_MOD1_MASK,
 859                                 "delete_from_cursor", 2,
 860                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 861                                 GTK_TYPE_INT, 1);
 862
 863   gtk_binding_entry_add_signal (binding_set, GDK_BackSpace, GDK_CONTROL_MASK,
 864                                 "delete_from_cursor", 2,
 865                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 866                                 GTK_TYPE_INT, -1);
 867
 868   gtk_binding_entry_add_signal (binding_set, GDK_k, GDK_CONTROL_MASK,
 869                                 "delete_from_cursor", 2,
 870                                 GTK_TYPE_ENUM, GTK_DELETE_PARAGRAPH_ENDS,
 871                                 GTK_TYPE_INT, 1);
 872
 873   gtk_binding_entry_add_signal (binding_set, GDK_u, GDK_CONTROL_MASK,
 874                                 "delete_from_cursor", 2,
 875                                 GTK_TYPE_ENUM, GTK_DELETE_PARAGRAPHS,
 876                                 GTK_TYPE_INT, 1);
 877
 878   gtk_binding_entry_add_signal (binding_set, GDK_space, GDK_MOD1_MASK,
 879                                 "delete_from_cursor", 2,
 880                                 GTK_TYPE_ENUM, GTK_DELETE_WHITESPACE,
 881                                 GTK_TYPE_INT, 1);
 882   gtk_binding_entry_add_signal (binding_set, GDK_KP_Space, GDK_MOD1_MASK,
 883                                 "delete_from_cursor", 2,
 884                                 GTK_TYPE_ENUM, GTK_DELETE_WHITESPACE,
 885                                 GTK_TYPE_INT, 1);
 886   gtk_binding_entry_add_signal (binding_set, GDK_space, GDK_MOD1_MASK,
 887                                 "insert_at_cursor", 1,
 888                                 GTK_TYPE_STRING, " ");
 889   gtk_binding_entry_add_signal (binding_set, GDK_KP_Space, GDK_MOD1_MASK,
 890                                 "insert_at_cursor", 1,
 891                                 GTK_TYPE_STRING, " ");
 892
 893   gtk_binding_entry_add_signal (binding_set, GDK_backslash, GDK_MOD1_MASK,
 894                                 "delete_from_cursor", 2,
 895                                 GTK_TYPE_ENUM, GTK_DELETE_WHITESPACE,
 896                                 GTK_TYPE_INT, 1);
 897
 898   /* Cut/copy/paste */
 899
 900   gtk_binding_entry_add_signal (binding_set, GDK_x, GDK_CONTROL_MASK,
 901                                 "cut_clipboard", 0);
 902
 903   gtk_binding_entry_add_signal (binding_set, GDK_w, GDK_CONTROL_MASK,
 904                                 "cut_clipboard", 0);
 905
 906   gtk_binding_entry_add_signal (binding_set, GDK_c, GDK_CONTROL_MASK,
 907                                 "copy_clipboard", 0);
 908
 909   gtk_binding_entry_add_signal (binding_set, GDK_v, GDK_CONTROL_MASK,
 910                                 "paste_clipboard", 0);
 911
 912   gtk_binding_entry_add_signal (binding_set, GDK_y, GDK_CONTROL_MASK,
 913                                 "paste_clipboard", 0);
 914
 915   /* Overwrite */
 916   gtk_binding_entry_add_signal (binding_set, GDK_Insert, 0,
 917                                 "toggle_overwrite", 0);
 918   gtk_binding_entry_add_signal (binding_set, GDK_KP_Insert, 0,
 919                                 "toggle_overwrite", 0);
 920 }
 921
 922 void
 923 gtk_text_view_init (GtkTextView *text_view)
 924 {
 925   GtkWidget *widget;
 926
 927   widget = GTK_WIDGET (text_view);
 928
 929   GTK_WIDGET_SET_FLAGS (widget, GTK_CAN_FOCUS);
 930
 931   /* Set up default style */
 932   text_view->wrap_mode = GTK_WRAP_NONE;
 933   text_view->pixels_above_lines = 0;
 934   text_view->pixels_below_lines = 0;
 935   text_view->pixels_inside_wrap = 0;
 936   text_view->justify = GTK_JUSTIFY_LEFT;
 937   text_view->left_margin = 0;
 938   text_view->right_margin = 0;
 939   text_view->indent = 0;
 940   text_view->tabs = NULL;
 941   text_view->editable = TRUE;
 942
 943   gtk_drag_dest_set (widget,
 944                      0,
 945                      target_table, G_N_ELEMENTS (target_table),
 946                      GDK_ACTION_COPY | GDK_ACTION_MOVE);
 947
 948   text_view->virtual_cursor_x = -1;
 949   text_view->virtual_cursor_y = -1;
 950
 951   /* This object is completely private. No external entity can gain a reference
 952    * to it; so we create it here and destroy it in finalize ().
 953    */
 954   text_view->im_context = gtk_im_multicontext_new ();
 955
 956   g_signal_connect (G_OBJECT (text_view->im_context), "commit",
 957                     G_CALLBACK (gtk_text_view_commit_handler), text_view);
 958
 959   g_signal_connect (G_OBJECT (text_view->im_context), "preedit_changed",
 960                     G_CALLBACK (gtk_text_view_preedit_changed_handler), text_view);
 961
 962   text_view->cursor_visible = TRUE;
 963
 964   text_view->text_window = text_window_new (GTK_TEXT_WINDOW_TEXT,
 965                                             widget, 200, 200);
 966
 967   text_view->drag_start_x = -1;
 968   text_view->drag_start_y = -1;
 969
 970   text_view->pending_place_cursor_button = 0;
 971 }
 972
 973 /**
 974  * gtk_text_view_new:
 975  *
 976  * Creates a new #GtkTextView. If you don't call gtk_text_view_set_buffer()
 977  * before using the text view, an empty default buffer will be created
 978  * for you. Get the buffer with gtk_text_view_get_buffer(). If you want
 979  * to specify your own buffer, consider gtk_text_view_new_with_buffer().
 980  *
 981  * Return value: a new #GtkTextView
 982  **/
 983 GtkWidget*
 984 gtk_text_view_new (void)
 985 {
 986   return GTK_WIDGET (gtk_type_new (gtk_text_view_get_type ()));
 987 }
 988
 989 /**
 990  * gtk_text_view_new_with_buffer:
 991  * @buffer: a #GtkTextBuffer
 992  *
 993  * Creates a new #GtkTextView widget displaying the buffer
 994  * @buffer. One buffer can be shared among many widgets.
 995  * @buffer may be NULL to create a default buffer, in which case
 996  * this function is equivalent to gtk_text_view_new(). The
 997  * text view adds its own reference count to the buffer; it does not
 998  * take over an existing reference.
 999  *
1000  * Return value: a new #GtkTextView.
1001  **/
1002 GtkWidget*
1003 gtk_text_view_new_with_buffer (GtkTextBuffer *buffer)
1004 {
1005   GtkTextView *text_view;
1006
1007   text_view = (GtkTextView*)gtk_text_view_new ();
1008
1009   gtk_text_view_set_buffer (text_view, buffer);
1010
1011   return GTK_WIDGET (text_view);
1012 }
1013
1014 /**
1015  * gtk_text_view_set_buffer:
1016  * @text_view: a #GtkTextView
1017  * @buffer: a #GtkTextBuffer
1018  *
1019  * Sets @buffer as the buffer being displayed by @text_view. The previous
1020  * buffer displayed by the text view is unreferenced, and a reference is
1021  * added to @buffer. If you owned a reference to @buffer before passing it
1022  * to this function, you must remove that reference yourself; #GtkTextView
1023  * will not "adopt" it.
1024  *
1025  **/
1026 void
1027 gtk_text_view_set_buffer (GtkTextView   *text_view,
1028                           GtkTextBuffer *buffer)
1029 {
1030   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1031   g_return_if_fail (buffer == NULL || GTK_IS_TEXT_BUFFER (buffer));
1032
1033   if (text_view->buffer == buffer)
1034     return;
1035
1036   if (text_view->buffer != NULL)
1037     {
1038       /* Destroy all anchored children */
1039       GSList *tmp_list;
1040       GSList *copy;
1041
1042       copy = g_slist_copy (text_view->children);
1043       tmp_list = copy;
1044       while (tmp_list != NULL)
1045         {
1046           GtkTextViewChild *vc = tmp_list->data;
1047
1048           if (vc->anchor)
1049             {
1050               gtk_widget_destroy (vc->widget);
1051               /* vc may now be invalid! */
1052             }
1053
1054           tmp_list = g_slist_next (tmp_list);
1055         }
1056
1057       g_slist_free (copy);
1058
1059       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->buffer),
1060                                             gtk_text_view_mark_set_handler, text_view);
1061       g_object_unref (G_OBJECT (text_view->buffer));
1062       text_view->dnd_mark = NULL;
1063
1064       if (GTK_WIDGET_REALIZED (text_view))
1065         gtk_text_buffer_remove_selection_clipboard (text_view->buffer,
1066                                                     gtk_clipboard_get (GDK_SELECTION_PRIMARY));
1067     }
1068
1069   text_view->buffer = buffer;
1070
1071   if (buffer != NULL)
1072     {
1073       GtkTextIter start;
1074
1075       g_object_ref (G_OBJECT (buffer));
1076
1077       if (text_view->layout)
1078         gtk_text_layout_set_buffer (text_view->layout, buffer);
1079
1080       gtk_text_buffer_get_iter_at_offset (text_view->buffer, &start, 0);
1081
1082       text_view->dnd_mark = gtk_text_buffer_create_mark (text_view->buffer,
1083                                                          "gtk_drag_target",
1084                                                          &start, FALSE);
1085
1086       text_view->first_para_mark = gtk_text_buffer_create_mark (text_view->buffer,
1087                                                                 NULL,
1088                                                                 &start, TRUE);
1089
1090       text_view->first_para_pixels = 0;
1091
1092       g_signal_connect (G_OBJECT (text_view->buffer), "mark_set",
1093                         G_CALLBACK (gtk_text_view_mark_set_handler), text_view);
1094
1095       if (GTK_WIDGET_REALIZED (text_view))
1096         gtk_text_buffer_add_selection_clipboard (text_view->buffer,
1097                                                  gtk_clipboard_get (GDK_SELECTION_PRIMARY));
1098     }
1099
1100   if (GTK_WIDGET_VISIBLE (text_view))
1101     gtk_widget_queue_draw (GTK_WIDGET (text_view));
1102 }
1103
1104 static GtkTextBuffer*
1105 get_buffer (GtkTextView *text_view)
1106 {
1107   if (text_view->buffer == NULL)
1108     {
1109       GtkTextBuffer *b;
1110       b = gtk_text_buffer_new (NULL);
1111       gtk_text_view_set_buffer (text_view, b);
1112       g_object_unref (G_OBJECT (b));
1113     }
1114
1115   return text_view->buffer;
1116 }
1117
1118 /**
1119  * gtk_text_view_get_buffer:
1120  * @text_view: a #GtkTextView
1121  *
1122  * Returns the #GtkTextBuffer being displayed by this text view.
1123  * The reference count on the buffer is not incremented; the caller
1124  * of this function won't own a new reference.
1125  *
1126  * Return value: a #GtkTextBuffer
1127  **/
1128 GtkTextBuffer*
1129 gtk_text_view_get_buffer (GtkTextView *text_view)
1130 {
1131   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
1132
1133   return get_buffer (text_view);
1134 }
1135
1136 /**
1137  * gtk_text_view_get_iter_at_location:
1138  * @text_view: a #GtkTextView
1139  * @iter: a #GtkTextIter
1140  * @x: x position, in buffer coordinates
1141  * @y: y position, in buffer coordinates
1142  *
1143  * Retrieves the iterator at buffer coordinates @x and @y. Buffer
1144  * coordinates are coordinates for the entire buffer, not just the
1145  * currently-displayed portion.  If you have coordinates from an
1146  * event, you have to convert those to buffer coordinates with
1147  * gtk_text_view_window_to_buffer_coords().
1148  *
1149  **/
1150 void
1151 gtk_text_view_get_iter_at_location (GtkTextView *text_view,
1152                                     GtkTextIter *iter,
1153                                     gint         x,
1154                                     gint         y)
1155 {
1156   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1157   g_return_if_fail (iter != NULL);
1158   g_return_if_fail (text_view->layout != NULL);
1159
1160   gtk_text_layout_get_iter_at_pixel (text_view->layout,
1161                                      iter,
1162                                      x,
1163                                      y);
1164 }
1165
1166 /**
1167  * gtk_text_view_get_iter_location:
1168  * @text_view: a #GtkTextView
1169  * @iter: a #GtkTextIter
1170  * @location: bounds of the character at @iter
1171  *
1172  * Gets a rectangle which roughly contains the character at @iter.
1173  * The rectangle position is in buffer coordinates; use
1174  * gtk_text_view_buffer_to_window_coords() to convert these
1175  * coordinates to coordinates for one of the windows in the text view.
1176  *
1177  **/
1178 void
1179 gtk_text_view_get_iter_location (GtkTextView       *text_view,
1180                                  const GtkTextIter *iter,
1181                                  GdkRectangle      *location)
1182 {
1183   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1184   g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
1185
1186   gtk_text_layout_get_iter_location (text_view->layout, iter, location);
1187 }
1188
1189 /**
1190  * gtk_text_view_get_line_yrange:
1191  * @text_view: a #GtkTextView
1192  * @iter: a #GtkTextIter
1193  * @y: return location for a y coordinate
1194  * @height: return location for a height
1195  *
1196  * Gets the y coordinate of the top of the line containing @iter,
1197  * and the height of the line. The coordinate is a buffer coordinate;
1198  * convert to window coordinates with gtk_text_view_buffer_to_window_coords().
1199  *
1200  **/
1201 void
1202 gtk_text_view_get_line_yrange (GtkTextView       *text_view,
1203                                const GtkTextIter *iter,
1204                                gint              *y,
1205                                gint              *height)
1206 {
1207   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1208   g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
1209
1210   gtk_text_layout_get_line_yrange (text_view->layout,
1211                                    iter,
1212                                    y,
1213                                    height);
1214 }
1215
1216 /**
1217  * gtk_text_view_get_line_at_y:
1218  * @text_view: a #GtkTextView
1219  * @target_iter: a #GtkTextIter
1220  * @y: a y coordinate
1221  * @line_top: return location for top coordinate of the line
1222  *
1223  * Gets the #GtkTextIter at the start of the line containing
1224  * the coordinate @y. @y is in buffer coordinates, convert from
1225  * window coordinates with gtk_text_view_window_to_buffer_coords().
1226  * If non-%NULL, @line_top will be filled with the coordinate of the top
1227  * edge of the line.
1228  **/
1229 void
1230 gtk_text_view_get_line_at_y (GtkTextView *text_view,
1231                              GtkTextIter *target_iter,
1232                              gint         y,
1233                              gint        *line_top)
1234 {
1235   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1236
1237   gtk_text_layout_get_line_at_y (text_view->layout,
1238                                  target_iter,
1239                                  y,
1240                                  line_top);
1241 }
1242
1243 static gboolean
1244 set_adjustment_clamped (GtkAdjustment *adj, gdouble val)
1245 {
1246   DV (g_print ("  Setting adj to raw value %g\n", val));
1247
1248   /* We don't really want to clamp to upper; we want to clamp to
1249      upper - page_size which is the highest value the scrollbar
1250      will let us reach. */
1251   if (val > (adj->upper - adj->page_size))
1252     val = adj->upper - adj->page_size;
1253
1254   if (val < adj->lower)
1255     val = adj->lower;
1256
1257   if (val != adj->value)
1258     {
1259       DV (g_print ("  Setting adj to clamped value %g\n", val));
1260       gtk_adjustment_set_value (adj, val);
1261       return TRUE;
1262     }
1263   else
1264     return FALSE;
1265 }
1266
1267 /**
1268  * gtk_text_view_scroll_to_iter:
1269  * @text_view: a #GtkTextView
1270  * @iter: a #GtkTextIter
1271  * @within_margin: margin as a [0.0,0.5) fraction of screen size
1272  * @use_align: whether to use alignment arguments (if %FALSE, just get the mark onscreen)
1273  * @xalign: horizontal alignment of mark within visible area.
1274  * @yalign: vertical alignment of mark within visible area
1275  *
1276  * Scrolls @text_view so that @iter is on the screen in the position
1277  * indicated by @xalign and @yalign. An alignment of 0.0 indicates
1278  * left or top, 1.0 indicates right or bottom, 0.5 means center. If @use_align
1279  * is %FALSE, the text scrolls the minimal distance to get the mark onscreen,
1280  * possibly not scrolling at all. The effective screen for purposes
1281  * of this function is reduced by a margin of size @within_margin.
1282  * NOTE: This function uses the currently-computed height of the
1283  * lines in the text buffer. Note that line heights are computed
1284  * in an idle handler; so this function may not have the desired effect
1285  * if it's called before the height computations. To avoid oddness,
1286  * consider using gtk_text_view_scroll_to_mark() which saves a point
1287  * to be scrolled to after line validation.
1288  *
1289  * Return value: %TRUE if scrolling occurred
1290  **/
1291 gboolean
1292 gtk_text_view_scroll_to_iter (GtkTextView   *text_view,
1293                               GtkTextIter   *iter,
1294                               gdouble        within_margin,
1295                               gboolean       use_align,
1296                               gdouble        xalign,
1297                               gdouble        yalign)
1298 {
1299   GdkRectangle rect;
1300   GdkRectangle screen;
1301   gint screen_bottom;
1302   gint screen_right;
1303   gint scroll_dest;
1304   GtkWidget *widget;
1305   gboolean retval = FALSE;
1306   gint scroll_inc;
1307   gint screen_xoffset, screen_yoffset;
1308   gint current_x_scroll, current_y_scroll;
1309
1310   /* FIXME why don't we do the validate-at-scroll-destination thing
1311    * from flush_scroll in this function? I think it wasn't done before
1312    * because changed_handler was screwed up, but I could be wrong.
1313    */
1314
1315   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1316   g_return_val_if_fail (iter != NULL, FALSE);
1317   g_return_val_if_fail (within_margin >= 0.0 && within_margin < 0.5, FALSE);
1318   g_return_val_if_fail (xalign >= 0.0 && xalign <= 1.0, FALSE);
1319   g_return_val_if_fail (yalign >= 0.0 && yalign <= 1.0, FALSE);
1320
1321   widget = GTK_WIDGET (text_view);
1322
1323   DV(g_print(G_STRLOC"\n"));
1324
1325   gtk_text_layout_get_iter_location (text_view->layout,
1326                                      iter,
1327                                      &rect);
1328
1329   DV (g_print (" target rect %d,%d  %d x %d\n", rect.x, rect.y, rect.width, rect.height));
1330
1331   current_x_scroll = text_view->xoffset;
1332   current_y_scroll = text_view->yoffset;
1333
1334   screen.x = current_x_scroll;
1335   screen.y = current_y_scroll;
1336   screen.width = SCREEN_WIDTH (widget);
1337   screen.height = SCREEN_HEIGHT (widget);
1338
1339   screen_xoffset = screen.width * within_margin;
1340   screen_yoffset = screen.height * within_margin;
1341
1342   screen.x += screen_xoffset;
1343   screen.y += screen_yoffset;
1344   screen.width -= screen_xoffset * 2;
1345   screen.height -= screen_yoffset * 2;
1346
1347   /* paranoia check */
1348   if (screen.width < 1)
1349     screen.width = 1;
1350   if (screen.height < 1)
1351     screen.height = 1;
1352
1353   screen_right = screen.x + screen.width;
1354   screen_bottom = screen.y + screen.height;
1355
1356   /* The alignment affects the point in the target character that we
1357    * choose to align. If we're doing right/bottom alignment, we align
1358    * the right/bottom edge of the character the mark is at; if we're
1359    * doing left/top we align the left/top edge of the character; if
1360    * we're doing center alignment we align the center of the
1361    * character.
1362    */
1363
1364   /* Vertical scroll */
1365
1366   scroll_inc = 0;
1367   scroll_dest = current_y_scroll;
1368
1369   if (use_align)
1370     {
1371       scroll_dest = rect.y + (rect.height * yalign) - (screen.height * yalign);
1372
1373       /* if scroll_dest < screen.y, we move a negative increment (up),
1374        * else a positive increment (down)
1375        */
1376       scroll_inc = scroll_dest - screen.y + screen_yoffset;
1377     }
1378   else
1379     {
1380       /* move minimum to get onscreen */
1381       if (rect.y < screen.y)
1382         {
1383           scroll_dest = rect.y;
1384           scroll_inc = scroll_dest - screen.y - screen_yoffset;
1385         }
1386       else if ((rect.y + rect.height) > screen_bottom)
1387         {
1388           scroll_dest = rect.y + rect.height;
1389           scroll_inc = scroll_dest - screen_bottom + screen_yoffset;
1390         }
1391     }
1392
1393   if (scroll_inc != 0)
1394     {
1395       retval = set_adjustment_clamped (get_vadjustment (text_view),
1396                                        current_y_scroll + scroll_inc);
1397
1398       DV (g_print (" vert increment %d\n", scroll_inc));
1399     }
1400
1401   /* Horizontal scroll */
1402
1403   scroll_inc = 0;
1404   scroll_dest = current_x_scroll;
1405
1406   if (use_align)
1407     {
1408       scroll_dest = rect.x + (rect.width * xalign) - (screen.width * xalign);
1409
1410       /* if scroll_dest < screen.y, we move a negative increment (left),
1411        * else a positive increment (right)
1412        */
1413       scroll_inc = scroll_dest - screen.x + screen_xoffset;
1414     }
1415   else
1416     {
1417       /* move minimum to get onscreen */
1418       if (rect.x < screen.x)
1419         {
1420           scroll_dest = rect.x;
1421           scroll_inc = scroll_dest - screen.x - screen_xoffset;
1422         }
1423       else if ((rect.x + rect.width) > screen_right)
1424         {
1425           scroll_dest = rect.x + rect.width;
1426           scroll_inc = scroll_dest - screen_right + screen_xoffset;
1427         }
1428     }
1429
1430   if (scroll_inc != 0)
1431     {
1432       retval = set_adjustment_clamped (get_hadjustment (text_view),
1433                                        current_x_scroll + scroll_inc);
1434
1435       DV (g_print (" horiz increment %d\n", scroll_inc));
1436     }
1437
1438   if (retval)
1439     DV(g_print (">Actually scrolled ("G_STRLOC")\n"));
1440   else
1441     DV(g_print (">Didn't end up scrolling ("G_STRLOC")\n"));
1442
1443   return retval;
1444 }
1445
1446 static void
1447 free_pending_scroll (GtkTextPendingScroll *scroll)
1448 {
1449   if (!gtk_text_mark_get_deleted (scroll->mark))
1450     gtk_text_buffer_delete_mark (gtk_text_mark_get_buffer (scroll->mark),
1451                                  scroll->mark);
1452   g_object_unref (G_OBJECT (scroll->mark));
1453   g_free (scroll);
1454 }
1455
1456 static void
1457 gtk_text_view_queue_scroll (GtkTextView   *text_view,
1458                             GtkTextMark   *mark,
1459                             gdouble        within_margin,
1460                             gboolean       use_align,
1461                             gdouble        xalign,
1462                             gdouble        yalign)
1463 {
1464   GtkTextIter iter;
1465   GtkTextPendingScroll *scroll;
1466
1467   DV(g_print(G_STRLOC"\n"));
1468
1469   scroll = g_new (GtkTextPendingScroll, 1);
1470
1471   scroll->within_margin = within_margin;
1472   scroll->use_align = use_align;
1473   scroll->xalign = xalign;
1474   scroll->yalign = yalign;
1475
1476   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
1477
1478   scroll->mark = gtk_text_buffer_create_mark (get_buffer (text_view),
1479                                               NULL,
1480                                               &iter,
1481                                               gtk_text_mark_get_left_gravity (mark));
1482
1483   g_object_ref (G_OBJECT (scroll->mark));
1484
1485   if (text_view->pending_scroll)
1486     free_pending_scroll (text_view->pending_scroll);
1487
1488   text_view->pending_scroll = scroll;
1489 }
1490
1491 static gboolean
1492 gtk_text_view_flush_scroll (GtkTextView *text_view)
1493 {
1494   GtkTextIter iter;
1495   GtkTextPendingScroll *scroll;
1496   gboolean retval;
1497
1498   DV(g_print(G_STRLOC"\n"));
1499
1500   if (text_view->pending_scroll == NULL)
1501     return FALSE;
1502
1503   scroll = text_view->pending_scroll;
1504
1505   /* avoid recursion */
1506   text_view->pending_scroll = NULL;
1507
1508   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, scroll->mark);
1509
1510   /* Validate arbitrary area around the scroll destination, so the adjustment
1511    * can meaningfully point into that area
1512    */
1513   DV(g_print (">Validating scroll destination ("G_STRLOC")\n"));
1514   gtk_text_layout_validate_yrange (text_view->layout, &iter, -300, 300);
1515
1516   DV(g_print (">Done validating scroll destination ("G_STRLOC")\n"));
1517
1518   /* Ensure we have updated width/height */
1519   gtk_text_view_update_adjustments (text_view);
1520
1521   retval = gtk_text_view_scroll_to_iter (text_view,
1522                                          &iter,
1523                                          scroll->within_margin,
1524                                          scroll->use_align,
1525                                          scroll->xalign,
1526                                          scroll->yalign);
1527
1528   free_pending_scroll (scroll);
1529
1530   return retval;
1531 }
1532
1533 static void
1534 gtk_text_view_set_adjustment_upper (GtkAdjustment *adj, gdouble upper)
1535 {
1536   if (upper != adj->upper)
1537     {
1538       gdouble min = MAX (0.0, upper - adj->page_size);
1539       gboolean value_changed = FALSE;
1540
1541       adj->upper = upper;
1542
1543       if (adj->value > min)
1544         {
1545           adj->value = min;
1546           value_changed = TRUE;
1547         }
1548
1549       gtk_signal_emit_by_name (GTK_OBJECT (adj), "changed");
1550       DV(g_print(">Changed adj upper to %g ("G_STRLOC")\n", upper));
1551
1552       if (value_changed)
1553         {
1554           DV(g_print(">Changed adj value because upper decreased ("G_STRLOC")\n"));
1555           gtk_signal_emit_by_name (GTK_OBJECT (adj), "value_changed");
1556         }
1557     }
1558 }
1559
1560 static void
1561 gtk_text_view_update_adjustments (GtkTextView *text_view)
1562 {
1563   gint width = 0, height = 0;
1564
1565   DV(g_print(">Updating adjustments ("G_STRLOC")\n"));
1566
1567   gtk_text_layout_get_size (text_view->layout, &width, &height);
1568
1569   if (text_view->width != width || text_view->height != height)
1570     {
1571       text_view->width = width;
1572       text_view->height = height;
1573
1574       gtk_text_view_set_adjustment_upper (get_hadjustment (text_view),
1575                                           MAX (SCREEN_WIDTH (text_view), width));
1576       gtk_text_view_set_adjustment_upper (get_vadjustment (text_view),
1577                                           MAX (SCREEN_HEIGHT (text_view), height));
1578
1579       /* hadj/vadj exist since we called get_hadjustment/get_vadjustment above */
1580
1581       /* Set up the step sizes; we'll say that a page is
1582          our allocation minus one step, and a step is
1583          1/10 of our allocation. */
1584       text_view->hadjustment->step_increment =
1585         SCREEN_WIDTH (text_view) / 10.0;
1586       text_view->hadjustment->page_increment =
1587         SCREEN_WIDTH (text_view) * 0.9;
1588
1589       text_view->vadjustment->step_increment =
1590         SCREEN_HEIGHT (text_view) / 10.0;
1591       text_view->vadjustment->page_increment =
1592         SCREEN_HEIGHT (text_view) * 0.9;
1593
1594       gtk_signal_emit_by_name (GTK_OBJECT (get_hadjustment (text_view)), "changed");
1595       gtk_signal_emit_by_name (GTK_OBJECT (get_hadjustment (text_view)), "changed");
1596     }
1597 }
1598
1599 static void
1600 gtk_text_view_update_layout_width (GtkTextView *text_view)
1601 {
1602   DV(g_print(">Updating layout width ("G_STRLOC")\n"));
1603
1604   gtk_text_view_ensure_layout (text_view);
1605
1606   gtk_text_layout_set_screen_width (text_view->layout,
1607                                     SCREEN_WIDTH (text_view));
1608 }
1609
1610 static void
1611 gtk_text_view_update_im_spot_location (GtkTextView *text_view)
1612 {
1613   GdkRectangle area;
1614   gint cursor_x_pos, cursor_y_pos;
1615
1616   if (text_view->layout == NULL)
1617     return;
1618
1619   gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, &cursor_y_pos);
1620
1621   area.x = cursor_x_pos;
1622   area.y = cursor_y_pos;
1623   area.width = area.height = 0;
1624
1625   gtk_im_context_set_cursor_location (text_view->im_context, &area);
1626 }
1627
1628 /**
1629  * gtk_text_view_scroll_to_mark:
1630  * @text_view: a #GtkTextView
1631  * @mark: a #GtkTextMark
1632  * @within_margin: margin as a [0.0,0.5) fraction of screen size
1633  * @use_align: whether to use alignment arguments (if %FALSE, just get the mark onscreen)
1634  * @xalign: horizontal alignment of mark within visible area.
1635  * @yalign: vertical alignment of mark within visible area
1636  *
1637  * Scrolls @text_view so that @mark is on the screen in the position
1638  * indicated by @xalign and @yalign. An alignment of 0.0 indicates
1639  * left or top, 1.0 indicates right or bottom, 0.5 means center. If @use_align
1640  * is %FALSE, the text scrolls the minimal distance to get the mark onscreen,
1641  * possibly not scrolling at all. The effective screen for purposes
1642  * of this function is reduced by a margin of size @within_margin.
1643  *
1644  **/
1645 void
1646 gtk_text_view_scroll_to_mark (GtkTextView *text_view,
1647                               GtkTextMark *mark,
1648                               gdouble      within_margin,
1649                               gboolean     use_align,
1650                               gdouble      xalign,
1651                               gdouble      yalign)
1652 {
1653   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1654   g_return_if_fail (GTK_IS_TEXT_MARK (mark));
1655   g_return_if_fail (within_margin >= 0.0 && within_margin < 0.5);
1656   g_return_if_fail (xalign >= 0.0 && xalign <= 1.0);
1657   g_return_if_fail (yalign >= 0.0 && yalign <= 1.0);
1658
1659   gtk_text_view_queue_scroll (text_view, mark,
1660                               within_margin,
1661                               use_align,
1662                               xalign,
1663                               yalign);
1664
1665   /* If no validation is pending, we need to go ahead and force an
1666    * immediate scroll.
1667    */
1668   if (text_view->layout &&
1669       gtk_text_layout_is_valid (text_view->layout))
1670     gtk_text_view_flush_scroll (text_view);
1671 }
1672
1673 void
1674 gtk_text_view_scroll_mark_onscreen (GtkTextView *text_view,
1675                                     GtkTextMark *mark)
1676 {
1677   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1678   g_return_if_fail (GTK_IS_TEXT_MARK (mark));
1679
1680   gtk_text_view_scroll_to_mark (text_view, mark, 0.0, FALSE, 0.0, 0.0);
1681 }
1682
1683 static gboolean
1684 clamp_iter_onscreen (GtkTextView *text_view, GtkTextIter *iter)
1685 {
1686   GdkRectangle visible_rect;
1687   gtk_text_view_get_visible_rect (text_view, &visible_rect);
1688
1689   return gtk_text_layout_clamp_iter_to_vrange (text_view->layout, iter,
1690                                                visible_rect.y,
1691                                                visible_rect.y + visible_rect.height);
1692 }
1693
1694 /**
1695  * gtk_text_view_move_mark_onscreen:
1696  * @text_view: a #GtkTextView
1697  * @mark: a #GtkTextMark
1698  *
1699  * Moves a mark within the buffer so that it's
1700  * located within the currently-visible text area.
1701  *
1702  * Return value: %TRUE if the mark moved (wasn't already onscreen)
1703  **/
1704 gboolean
1705 gtk_text_view_move_mark_onscreen (GtkTextView *text_view,
1706                                   GtkTextMark *mark)
1707 {
1708   GtkTextIter iter;
1709
1710   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1711   g_return_val_if_fail (mark != NULL, FALSE);
1712
1713   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
1714
1715   if (clamp_iter_onscreen (text_view, &iter))
1716     {
1717       gtk_text_buffer_move_mark (get_buffer (text_view), mark, &iter);
1718       return TRUE;
1719     }
1720   else
1721     return FALSE;
1722 }
1723
1724 /**
1725  * gtk_text_view_get_visible_rect:
1726  * @text_view: a #GtkTextView
1727  * @visible_rect: rectangle to fill
1728  *
1729  * Fills @visible_rect with the currently-visible
1730  * region of the buffer, in buffer coordinates. Convert to window coordinates
1731  * with gtk_text_view_buffer_to_window_coords().
1732  **/
1733 void
1734 gtk_text_view_get_visible_rect (GtkTextView  *text_view,
1735                                 GdkRectangle *visible_rect)
1736 {
1737   GtkWidget *widget;
1738
1739   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1740
1741   widget = GTK_WIDGET (text_view);
1742
1743   if (visible_rect)
1744     {
1745       visible_rect->x = text_view->xoffset;
1746       visible_rect->y = text_view->yoffset;
1747       visible_rect->width = SCREEN_WIDTH (widget);
1748       visible_rect->height = SCREEN_HEIGHT (widget);
1749
1750       DV(g_print(" visible rect: %d,%d %d x %d\n",
1751                  visible_rect->x,
1752                  visible_rect->y,
1753                  visible_rect->width,
1754                  visible_rect->height));
1755     }
1756 }
1757
1758 /**
1759  * gtk_text_view_set_wrap_mode:
1760  * @text_view: a #GtkTextView
1761  * @wrap_mode: a #GtkWrapMode
1762  *
1763  * Sets the line wrapping for the view.
1764  **/
1765 void
1766 gtk_text_view_set_wrap_mode (GtkTextView *text_view,
1767                              GtkWrapMode  wrap_mode)
1768 {
1769   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1770
1771   if (text_view->wrap_mode != wrap_mode)
1772     {
1773       text_view->wrap_mode = wrap_mode;
1774
1775       if (text_view->layout)
1776         {
1777           text_view->layout->default_style->wrap_mode = wrap_mode;
1778           gtk_text_layout_default_style_changed (text_view->layout);
1779         }
1780     }
1781
1782   g_object_notify (G_OBJECT (text_view), "wrap_mode");
1783 }
1784
1785 /**
1786  * gtk_text_view_get_wrap_mode:
1787  * @text_view: a #GtkTextView
1788  *
1789  * Gets the line wrapping for the view.
1790  *
1791  * Return value: the line wrap setting
1792  **/
1793 GtkWrapMode
1794 gtk_text_view_get_wrap_mode (GtkTextView *text_view)
1795 {
1796   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_WRAP_NONE);
1797
1798   return text_view->wrap_mode;
1799 }
1800
1801 /**
1802  * gtk_text_view_set_editable:
1803  * @text_view: a #GtkTextView
1804  * @setting: whether it's editable
1805  *
1806  * Sets the default editability of the #GtkTextView. You can override
1807  * this default setting with tags in the buffer, using the "editable"
1808  * attribute of tags.
1809  **/
1810 void
1811 gtk_text_view_set_editable (GtkTextView *text_view,
1812                             gboolean     setting)
1813 {
1814   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1815
1816   if (text_view->editable != setting)
1817     {
1818       text_view->editable = setting;
1819
1820       if (text_view->layout)
1821         {
1822           text_view->layout->default_style->editable = text_view->editable;
1823           gtk_text_layout_default_style_changed (text_view->layout);
1824         }
1825     }
1826
1827   g_object_notify (G_OBJECT (text_view), "editable");
1828 }
1829
1830 /**
1831  * gtk_text_view_get_editable:
1832  * @text_view: a #GtkTextView
1833  *
1834  * Returns the default editability of the #GtkTextView. Tags in the
1835  * buffer may override this setting for some ranges of text.
1836  *
1837  * Return value: whether text is editable by default
1838  **/
1839 gboolean
1840 gtk_text_view_get_editable (GtkTextView *text_view)
1841 {
1842   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1843
1844   return text_view->editable;
1845 }
1846
1847 void
1848 gtk_text_view_set_pixels_above_lines (GtkTextView *text_view,
1849                                       gint         pixels_above_lines)
1850 {
1851   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1852
1853   if (text_view->pixels_above_lines != pixels_above_lines)
1854     {
1855       text_view->pixels_above_lines = pixels_above_lines;
1856
1857       if (text_view->layout)
1858         {
1859           text_view->layout->default_style->pixels_above_lines = pixels_above_lines;
1860           gtk_text_layout_default_style_changed (text_view->layout);
1861         }
1862     }
1863
1864   g_object_notify (G_OBJECT (text_view), "pixels_above_lines");
1865 }
1866
1867 gint
1868 gtk_text_view_get_pixels_above_lines (GtkTextView *text_view)
1869 {
1870   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1871
1872   return text_view->pixels_above_lines;
1873 }
1874
1875 void
1876 gtk_text_view_set_pixels_below_lines (GtkTextView *text_view,
1877                                       gint         pixels_below_lines)
1878 {
1879   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1880
1881   if (text_view->pixels_below_lines != pixels_below_lines)
1882     {
1883       text_view->pixels_below_lines = pixels_below_lines;
1884
1885       if (text_view->layout)
1886         {
1887           text_view->layout->default_style->pixels_below_lines = pixels_below_lines;
1888           gtk_text_layout_default_style_changed (text_view->layout);
1889         }
1890     }
1891
1892   g_object_notify (G_OBJECT (text_view), "pixels_below_lines");
1893 }
1894
1895 gint
1896 gtk_text_view_get_pixels_below_lines (GtkTextView *text_view)
1897 {
1898   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1899
1900   return text_view->pixels_below_lines;
1901 }
1902
1903 void
1904 gtk_text_view_set_pixels_inside_wrap (GtkTextView *text_view,
1905                                       gint         pixels_inside_wrap)
1906 {
1907   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1908
1909   if (text_view->pixels_inside_wrap != pixels_inside_wrap)
1910     {
1911       text_view->pixels_inside_wrap = pixels_inside_wrap;
1912
1913       if (text_view->layout)
1914         {
1915           text_view->layout->default_style->pixels_inside_wrap = pixels_inside_wrap;
1916           gtk_text_layout_default_style_changed (text_view->layout);
1917         }
1918     }
1919   g_object_notify (G_OBJECT (text_view), "pixels_inside_wrap");
1920 }
1921
1922 gint
1923 gtk_text_view_get_pixels_inside_wrap (GtkTextView *text_view)
1924 {
1925   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1926
1927   return text_view->pixels_inside_wrap;
1928 }
1929
1930 void
1931 gtk_text_view_set_justification (GtkTextView     *text_view,
1932                                  GtkJustification justify)
1933 {
1934   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1935
1936   if (text_view->justify != justify)
1937     {
1938       text_view->justify = justify;
1939
1940       if (text_view->layout)
1941         {
1942           text_view->layout->default_style->justification = justify;
1943           gtk_text_layout_default_style_changed (text_view->layout);
1944         }
1945     }
1946
1947   g_object_notify (G_OBJECT (text_view), "justification");
1948 }
1949
1950 GtkJustification
1951 gtk_text_view_get_justification (GtkTextView *text_view)
1952 {
1953   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_JUSTIFY_LEFT);
1954
1955   return text_view->justify;
1956 }
1957
1958 void
1959 gtk_text_view_set_left_margin (GtkTextView *text_view,
1960                                gint         left_margin)
1961 {
1962   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1963
1964   if (text_view->left_margin != left_margin)
1965     {
1966       text_view->left_margin = left_margin;
1967
1968       if (text_view->layout)
1969         {
1970           text_view->layout->default_style->left_margin = left_margin;
1971           gtk_text_layout_default_style_changed (text_view->layout);
1972         }
1973     }
1974
1975   g_object_notify (G_OBJECT (text_view), "left_margin");
1976 }
1977
1978 gint
1979 gtk_text_view_get_left_margin (GtkTextView *text_view)
1980 {
1981   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1982
1983   return text_view->left_margin;
1984 }
1985
1986 void
1987 gtk_text_view_set_right_margin (GtkTextView *text_view,
1988                                 gint         right_margin)
1989 {
1990   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1991
1992   if (text_view->right_margin != right_margin)
1993     {
1994       text_view->right_margin = right_margin;
1995
1996       if (text_view->layout)
1997         {
1998           text_view->layout->default_style->right_margin = right_margin;
1999           gtk_text_layout_default_style_changed (text_view->layout);
2000         }
2001     }
2002
2003   g_object_notify (G_OBJECT (text_view), "right_margin");
2004 }
2005
2006 gint
2007 gtk_text_view_get_right_margin (GtkTextView *text_view)
2008 {
2009   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2010
2011   return text_view->right_margin;
2012 }
2013
2014 void
2015 gtk_text_view_set_indent (GtkTextView *text_view,
2016                           gint         indent)
2017 {
2018   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2019
2020   if (text_view->indent != indent)
2021     {
2022       text_view->indent = indent;
2023
2024       if (text_view->layout)
2025         {
2026           text_view->layout->default_style->indent = indent;
2027           gtk_text_layout_default_style_changed (text_view->layout);
2028         }
2029     }
2030   g_object_notify (G_OBJECT (text_view), "indent");
2031 }
2032
2033 gint
2034 gtk_text_view_get_indent (GtkTextView *text_view)
2035 {
2036   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2037
2038   return text_view->indent;
2039 }
2040
2041 void
2042 gtk_text_view_set_tabs (GtkTextView   *text_view,
2043                         PangoTabArray *tabs)
2044 {
2045   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2046
2047   if (text_view->tabs)
2048     pango_tab_array_free (text_view->tabs);
2049
2050   text_view->tabs = tabs ? pango_tab_array_copy (tabs) : NULL;
2051
2052   if (text_view->layout)
2053     {
2054       /* some unkosher futzing in internal struct details... */
2055       if (text_view->layout->default_style->tabs)
2056         pango_tab_array_free (text_view->layout->default_style->tabs);
2057
2058       text_view->layout->default_style->tabs =
2059         text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
2060
2061       gtk_text_layout_default_style_changed (text_view->layout);
2062     }
2063
2064   g_object_notify (G_OBJECT (text_view), "tabs");
2065 }
2066
2067 PangoTabArray*
2068 gtk_text_view_get_tabs (GtkTextView *text_view)
2069 {
2070   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
2071
2072   return text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
2073 }
2074
2075 /**
2076  * gtk_text_view_set_cursor_visible:
2077  * @text_view: a #GtkTextView
2078  * @setting: whether to show the insertion cursor
2079  *
2080  * Toggles whether the insertion point is displayed. A buffer with no editable
2081  * text probably shouldn't have a visible cursor, so you may want to turn
2082  * the cursor off.
2083  **/
2084 void
2085 gtk_text_view_set_cursor_visible    (GtkTextView   *text_view,
2086                                      gboolean       setting)
2087 {
2088   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2089
2090   setting = (setting != FALSE);
2091
2092   if (text_view->cursor_visible != setting)
2093     {
2094       text_view->cursor_visible = setting;
2095
2096       if (GTK_WIDGET_HAS_FOCUS (text_view))
2097         {
2098           if (text_view->layout)
2099             {
2100               gtk_text_layout_set_cursor_visible (text_view->layout, setting);
2101               gtk_text_view_check_cursor_blink (text_view);
2102             }
2103         }
2104     }
2105
2106   g_object_notify (G_OBJECT (text_view), "cursor_visible");
2107 }
2108
2109 /**
2110  * gtk_text_view_get_cursor_visible:
2111  * @text_view: a #GtkTextView
2112  *
2113  * Find out whether the cursor is being displayed.
2114  *
2115  * Return value: whether the insertion mark is visible
2116  **/
2117 gboolean
2118 gtk_text_view_get_cursor_visible    (GtkTextView   *text_view)
2119 {
2120   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
2121
2122   return text_view->cursor_visible;
2123 }
2124
2125
2126 /**
2127  * gtk_text_view_place_cursor_onscreen:
2128  * @text_view: a #GtkTextView
2129  *
2130  * Moves the cursor to the currently visible region of the
2131  * buffer, it it isn't there already.
2132  *
2133  * Return value: TRUE if the cursor had to be moved.
2134  **/
2135 gboolean
2136 gtk_text_view_place_cursor_onscreen (GtkTextView *text_view)
2137 {
2138   GtkTextIter insert;
2139
2140   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
2141
2142   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
2143                                     gtk_text_buffer_get_mark (get_buffer (text_view),
2144                                                               "insert"));
2145
2146   if (clamp_iter_onscreen (text_view, &insert))
2147     {
2148       gtk_text_buffer_place_cursor (get_buffer (text_view), &insert);
2149       return TRUE;
2150     }
2151   else
2152     return FALSE;
2153 }
2154
2155 static void
2156 gtk_text_view_destroy (GtkObject *object)
2157 {
2158   GtkTextView *text_view;
2159   GtkTextLayout *layout;
2160
2161   text_view = GTK_TEXT_VIEW (object);
2162
2163   layout = text_view->layout;
2164
2165   gtk_text_view_destroy_layout (text_view);
2166   gtk_text_view_set_buffer (text_view, NULL);
2167
2168   (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
2169 }
2170
2171 static void
2172 gtk_text_view_finalize (GObject *object)
2173 {
2174   GtkTextView *text_view;
2175
2176   text_view = GTK_TEXT_VIEW (object);
2177
2178   g_return_if_fail (text_view->buffer == NULL);
2179
2180   gtk_text_view_destroy_layout (text_view);
2181   gtk_text_view_set_buffer (text_view, NULL);
2182
2183   if (text_view->pending_scroll)
2184     {
2185       free_pending_scroll (text_view->pending_scroll);
2186       text_view->pending_scroll = NULL;
2187     }
2188
2189   if (text_view->hadjustment)
2190     g_object_unref (G_OBJECT (text_view->hadjustment));
2191   if (text_view->vadjustment)
2192     g_object_unref (G_OBJECT (text_view->vadjustment));
2193
2194   text_window_free (text_view->text_window);
2195
2196   if (text_view->left_window)
2197     text_window_free (text_view->left_window);
2198
2199   if (text_view->top_window)
2200     text_window_free (text_view->top_window);
2201
2202   if (text_view->right_window)
2203     text_window_free (text_view->right_window);
2204
2205   if (text_view->bottom_window)
2206     text_window_free (text_view->bottom_window);
2207
2208   g_object_unref (G_OBJECT (text_view->im_context));
2209
2210   (* G_OBJECT_CLASS (parent_class)->finalize) (object);
2211 }
2212
2213 static void
2214 gtk_text_view_set_property (GObject         *object,
2215                             guint            prop_id,
2216                             const GValue    *value,
2217                             GParamSpec      *pspec)
2218 {
2219   GtkTextView *text_view;
2220
2221   text_view = GTK_TEXT_VIEW (object);
2222
2223   switch (prop_id)
2224     {
2225     case PROP_PIXELS_ABOVE_LINES:
2226       gtk_text_view_set_pixels_above_lines (text_view, g_value_get_int (value));
2227       break;
2228
2229     case PROP_PIXELS_BELOW_LINES:
2230       gtk_text_view_set_pixels_below_lines (text_view, g_value_get_int (value));
2231       break;
2232
2233     case PROP_PIXELS_INSIDE_WRAP:
2234       gtk_text_view_set_pixels_inside_wrap (text_view, g_value_get_int (value));
2235       break;
2236
2237     case PROP_EDITABLE:
2238       gtk_text_view_set_editable (text_view, g_value_get_boolean (value));
2239       break;
2240
2241     case PROP_WRAP_MODE:
2242       gtk_text_view_set_wrap_mode (text_view, g_value_get_enum (value));
2243       break;
2244
2245     case PROP_JUSTIFICATION:
2246       gtk_text_view_set_justification (text_view, g_value_get_enum (value));
2247       break;
2248
2249     case PROP_LEFT_MARGIN:
2250       gtk_text_view_set_left_margin (text_view, g_value_get_int (value));
2251       break;
2252
2253     case PROP_RIGHT_MARGIN:
2254       gtk_text_view_set_right_margin (text_view, g_value_get_int (value));
2255       break;
2256
2257     case PROP_INDENT:
2258       gtk_text_view_set_indent (text_view, g_value_get_int (value));
2259       break;
2260
2261     case PROP_TABS:
2262       gtk_text_view_set_tabs (text_view, g_value_get_object (value));
2263       break;
2264
2265     case PROP_CURSOR_VISIBLE:
2266       gtk_text_view_set_cursor_visible (text_view, g_value_get_boolean (value));
2267       break;
2268
2269     default:
2270       g_assert_not_reached ();
2271       break;
2272     }
2273 }
2274
2275 static void
2276 gtk_text_view_get_property (GObject         *object,
2277                             guint            prop_id,
2278                             GValue          *value,
2279                             GParamSpec      *pspec)
2280 {
2281   GtkTextView *text_view;
2282
2283   text_view = GTK_TEXT_VIEW (object);
2284
2285   switch (prop_id)
2286     {
2287     case PROP_PIXELS_ABOVE_LINES:
2288       g_value_set_int (value, text_view->pixels_above_lines);
2289       break;
2290
2291     case PROP_PIXELS_BELOW_LINES:
2292       g_value_set_int (value, text_view->pixels_below_lines);
2293       break;
2294
2295     case PROP_PIXELS_INSIDE_WRAP:
2296       g_value_set_int (value, text_view->pixels_inside_wrap);
2297       break;
2298
2299     case PROP_EDITABLE:
2300       g_value_set_boolean (value, text_view->editable);
2301       break;
2302
2303     case PROP_WRAP_MODE:
2304       g_value_set_enum (value, text_view->wrap_mode);
2305       break;
2306
2307     case PROP_JUSTIFICATION:
2308       g_value_set_enum (value, text_view->justify);
2309       break;
2310
2311     case PROP_LEFT_MARGIN:
2312       g_value_set_int (value, text_view->left_margin);
2313       break;
2314
2315     case PROP_RIGHT_MARGIN:
2316       g_value_set_int (value, text_view->right_margin);
2317       break;
2318
2319     case PROP_INDENT:
2320       g_value_set_int (value, text_view->indent);
2321       break;
2322
2323     case PROP_TABS:
2324       g_value_set_object (value, gtk_text_view_get_tabs (text_view));
2325       break;
2326
2327     case PROP_CURSOR_VISIBLE:
2328       g_value_set_boolean (value, text_view->cursor_visible);
2329       break;
2330
2331     default:
2332       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2333       break;
2334     }
2335 }
2336
2337 static void
2338 gtk_text_view_size_request (GtkWidget      *widget,
2339                             GtkRequisition *requisition)
2340 {
2341   GtkTextView *text_view;
2342   GSList *tmp_list;
2343   gint focus_edge_width;
2344   gboolean interior_focus;
2345
2346   text_view = GTK_TEXT_VIEW (widget);
2347
2348   gtk_widget_style_get (widget, "interior_focus", &interior_focus, NULL);
2349
2350   if (interior_focus)
2351     focus_edge_width = 0;
2352   else
2353     focus_edge_width = 1;
2354
2355   if (text_view->layout)
2356     {
2357       text_view->text_window->requisition.width = text_view->layout->width;
2358       text_view->text_window->requisition.height = text_view->layout->height;
2359     }
2360   else
2361     {
2362       text_view->text_window->requisition.width = 0;
2363       text_view->text_window->requisition.height = 0;
2364     }
2365
2366   requisition->width = text_view->text_window->requisition.width + focus_edge_width * 2;
2367   requisition->height = text_view->text_window->requisition.height + focus_edge_width * 2;
2368
2369   if (text_view->left_window)
2370     requisition->width += text_view->left_window->requisition.width;
2371
2372   if (text_view->right_window)
2373     requisition->width += text_view->right_window->requisition.width;
2374
2375   if (text_view->top_window)
2376     requisition->height += text_view->top_window->requisition.height;
2377
2378   if (text_view->bottom_window)
2379     requisition->height += text_view->bottom_window->requisition.height;
2380
2381   tmp_list = text_view->children;
2382   while (tmp_list != NULL)
2383     {
2384       GtkTextViewChild *child = tmp_list->data;
2385
2386       if (child->anchor)
2387         {
2388           GtkRequisition child_req;
2389           GtkRequisition old_req;
2390
2391           old_req = child->widget->requisition;
2392
2393           gtk_widget_size_request (child->widget, &child_req);
2394
2395           if (text_view->layout &&
2396               (old_req.width != child_req.width ||
2397                old_req.height != child_req.height))
2398             gtk_text_child_anchor_queue_resize (child->anchor,
2399                                                 text_view->layout);
2400         }
2401       else
2402         {
2403
2404         }
2405
2406       tmp_list = g_slist_next (tmp_list);
2407     }
2408 }
2409
2410 static void
2411 gtk_text_view_update_child_allocation (GtkTextView      *text_view,
2412                                        GtkTextViewChild *vc)
2413 {
2414   gint buffer_y;
2415   GtkTextIter iter;
2416   GtkAllocation allocation;
2417
2418   gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
2419                                             &iter,
2420                                             vc->anchor);
2421
2422   gtk_text_layout_get_line_yrange (text_view->layout, &iter,
2423                                    &buffer_y, NULL);
2424
2425   buffer_y += vc->from_top_of_line;
2426
2427   allocation.x = vc->from_left_of_buffer;
2428   allocation.y = buffer_y;
2429   allocation.width = vc->widget->requisition.width;
2430   allocation.height = vc->widget->requisition.height;
2431
2432   gtk_widget_size_allocate (vc->widget, &allocation);
2433 }
2434
2435 static void
2436 gtk_text_view_child_allocated (GtkTextLayout *layout,
2437                                GtkWidget     *child,
2438                                gint           x,
2439                                gint           y,
2440                                gpointer       data)
2441 {
2442   GtkTextViewChild *vc = NULL;
2443   GtkTextView *text_view = data;
2444
2445   /* x,y is the position of the child from the top of the line, and
2446    * from the left of the buffer. We have to translate that into text
2447    * window coordinates, then size_allocate the child.
2448    */
2449
2450   vc = g_object_get_data (G_OBJECT (child),
2451                             "gtk-text-view-child");
2452
2453   g_assert (vc != NULL);
2454
2455   g_print ("child allocated at %d,%d\n", x, y);
2456
2457   vc->from_left_of_buffer = x;
2458   vc->from_top_of_line = y;
2459
2460   gtk_text_view_update_child_allocation (text_view, vc);
2461 }
2462
2463 static void
2464 gtk_text_view_validate_children (GtkTextView *text_view)
2465 {
2466   GSList *tmp_list;
2467
2468   DV(g_print(G_STRLOC"\n"));
2469
2470   tmp_list = text_view->children;
2471   while (tmp_list != NULL)
2472     {
2473       GtkTextViewChild *child = tmp_list->data;
2474
2475       if (child->anchor)
2476         {
2477           /* We need to force-validate the regions containing
2478            * children.
2479            */
2480           GtkTextIter child_loc;
2481           gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
2482                                                     &child_loc,
2483                                                     child->anchor);
2484
2485           gtk_text_layout_validate_yrange (text_view->layout,
2486                                            &child_loc,
2487                                            0, 1);
2488         }
2489       else
2490         {
2491
2492         }
2493
2494       tmp_list = g_slist_next (tmp_list);
2495     }
2496 }
2497
2498 static void
2499 gtk_text_view_size_allocate (GtkWidget *widget,
2500                              GtkAllocation *allocation)
2501 {
2502   GtkTextView *text_view;
2503   GtkTextIter first_para;
2504   gint y;
2505   GtkAdjustment *vadj;
2506   gboolean yoffset_changed = FALSE;
2507   gint width, height;
2508   GdkRectangle text_rect;
2509   GdkRectangle left_rect;
2510   GdkRectangle right_rect;
2511   GdkRectangle top_rect;
2512   GdkRectangle bottom_rect;
2513   gint focus_edge_width;
2514   gboolean interior_focus;
2515
2516   text_view = GTK_TEXT_VIEW (widget);
2517
2518   DV(g_print(G_STRLOC"\n"));
2519
2520   widget->allocation = *allocation;
2521
2522   if (GTK_WIDGET_REALIZED (widget))
2523     {
2524       gdk_window_move_resize (widget->window,
2525                               allocation->x, allocation->y,
2526                               allocation->width, allocation->height);
2527     }
2528
2529   /* distribute width/height among child windows. Ensure all
2530    * windows get at least a 1x1 allocation.
2531    */
2532
2533   gtk_widget_style_get (widget, "interior_focus", &interior_focus, NULL);
2534
2535   if (interior_focus)
2536     focus_edge_width = 0;
2537   else
2538     focus_edge_width = 1;
2539
2540   width = allocation->width - focus_edge_width * 2;
2541
2542   if (text_view->left_window)
2543     left_rect.width = text_view->left_window->requisition.width;
2544   else
2545     left_rect.width = 1;
2546
2547   width -= left_rect.width;
2548
2549   if (text_view->right_window)
2550     right_rect.width = text_view->right_window->requisition.width;
2551   else
2552     right_rect.width = 1;
2553
2554   width -= right_rect.width;
2555
2556   text_rect.width = MAX (1, width);
2557
2558   top_rect.width = text_rect.width;
2559   bottom_rect.width = text_rect.width;
2560
2561
2562   height = allocation->height - focus_edge_width * 2;
2563
2564   if (text_view->top_window)
2565     top_rect.height = text_view->top_window->requisition.height;
2566   else
2567     top_rect.height = 1;
2568
2569   height -= top_rect.height;
2570
2571   if (text_view->bottom_window)
2572     bottom_rect.height = text_view->bottom_window->requisition.height;
2573   else
2574     bottom_rect.height = 1;
2575
2576   height -= bottom_rect.height;
2577
2578   text_rect.height = MAX (1, height);
2579
2580   left_rect.height = text_rect.height;
2581   right_rect.height = text_rect.height;
2582
2583   /* Origins */
2584   left_rect.x = focus_edge_width;
2585   top_rect.y = focus_edge_width;
2586
2587   text_rect.x = left_rect.x + left_rect.width;
2588   text_rect.y = top_rect.y + top_rect.height;
2589
2590   left_rect.y = text_rect.y;
2591   right_rect.y = text_rect.y;
2592
2593   top_rect.x = text_rect.x;
2594   bottom_rect.x = text_rect.x;
2595
2596   right_rect.x = text_rect.x + text_rect.width;
2597   bottom_rect.y = text_rect.y + text_rect.height;
2598
2599   text_window_size_allocate (text_view->text_window,
2600                              &text_rect);
2601
2602   if (text_view->left_window)
2603     text_window_size_allocate (text_view->left_window,
2604                                &left_rect);
2605
2606   if (text_view->right_window)
2607     text_window_size_allocate (text_view->right_window,
2608                                &right_rect);
2609
2610   if (text_view->top_window)
2611     text_window_size_allocate (text_view->top_window,
2612                                &top_rect);
2613
2614   if (text_view->bottom_window)
2615     text_window_size_allocate (text_view->bottom_window,
2616                                &bottom_rect);
2617
2618   gtk_text_view_update_layout_width (text_view);
2619
2620   /* This is because validating children ends up size allocating them. */
2621   gtk_text_view_validate_children (text_view);
2622
2623   /* Now adjust the value of the adjustment to keep the cursor at the
2624    * same place in the buffer
2625    */
2626   gtk_text_view_get_first_para_iter (text_view, &first_para);
2627   gtk_text_layout_get_line_yrange (text_view->layout, &first_para, &y, NULL);
2628
2629   y += text_view->first_para_pixels;
2630
2631   /* Ensure h/v adj exist */
2632   get_hadjustment (text_view);
2633   get_vadjustment (text_view);
2634
2635   vadj = text_view->vadjustment;
2636   if (y > vadj->upper - vadj->page_size)
2637     y = MAX (0, vadj->upper - vadj->page_size);
2638
2639   if (y != text_view->yoffset)
2640     {
2641       vadj->value = text_view->yoffset = y;
2642       yoffset_changed = TRUE;
2643     }
2644
2645   text_view->hadjustment->page_size = SCREEN_WIDTH (text_view);
2646   text_view->hadjustment->page_increment = SCREEN_WIDTH (text_view) / 2;
2647   text_view->hadjustment->lower = 0;
2648   text_view->hadjustment->upper = MAX (SCREEN_WIDTH (text_view),
2649                                        text_view->width);
2650   gtk_signal_emit_by_name (GTK_OBJECT (text_view->hadjustment), "changed");
2651
2652   text_view->vadjustment->page_size = SCREEN_HEIGHT (text_view);
2653   text_view->vadjustment->page_increment = SCREEN_HEIGHT (text_view) / 2;
2654   text_view->vadjustment->lower = 0;
2655   text_view->vadjustment->upper = MAX (SCREEN_HEIGHT (text_view),
2656                                        text_view->height);
2657   gtk_signal_emit_by_name (GTK_OBJECT (text_view->vadjustment), "changed");
2658
2659   if (yoffset_changed)
2660     gtk_adjustment_value_changed (vadj);
2661
2662   if (text_view->first_validate_idle != 0)
2663     {
2664       /* The GTK resize loop processes all the pending exposes right
2665        * after doing the resize stuff, so the idle sizer won't have a
2666        * chance to run. So we do the work here.
2667        */
2668
2669       g_source_remove (text_view->first_validate_idle);
2670       text_view->first_validate_idle = 0;
2671
2672       if (!gtk_text_view_flush_scroll (text_view))
2673         gtk_text_view_validate_onscreen (text_view);
2674     }
2675 }
2676
2677 static void
2678 gtk_text_view_get_first_para_iter (GtkTextView *text_view,
2679                                    GtkTextIter *iter)
2680 {
2681   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), iter,
2682                                     text_view->first_para_mark);
2683 }
2684
2685 static void
2686 gtk_text_view_validate_onscreen (GtkTextView *text_view)
2687 {
2688   GtkWidget *widget = GTK_WIDGET (text_view);
2689
2690   DV(g_print(">Validating onscreen ("G_STRLOC")\n"));
2691
2692   if (SCREEN_HEIGHT (widget) > 0)
2693     {
2694       GtkTextIter first_para;
2695
2696       /* Be sure we've validated the stuff onscreen; if we
2697        * scrolled, these calls won't have any effect, because
2698        * they were called in the recursive validate_onscreen
2699        */
2700       gtk_text_view_get_first_para_iter (text_view, &first_para);
2701
2702       gtk_text_layout_validate_yrange (text_view->layout,
2703                                        &first_para,
2704                                        0,
2705                                        text_view->first_para_pixels +
2706                                        SCREEN_HEIGHT (widget));
2707     }
2708
2709   text_view->onscreen_validated = TRUE;
2710
2711   DV(g_print(">Done validating onscreen, onscreen_validated = TRUE ("G_STRLOC")\n"));
2712
2713   /* This can have the odd side effect of triggering a scroll, which should
2714    * flip "onscreen_validated" back to FALSE, but should also get us
2715    * back into this function to turn it on again.
2716    */
2717   gtk_text_view_update_adjustments (text_view);
2718
2719   g_assert (text_view->onscreen_validated);
2720 }
2721
2722 static gboolean
2723 first_validate_callback (gpointer data)
2724 {
2725   GtkTextView *text_view = data;
2726
2727   GDK_THREADS_ENTER ();
2728
2729   /* Note that some of this code is duplicated at the end of size_allocate,
2730    * keep in sync with that.
2731    */
2732
2733   DV(g_print(G_STRLOC"\n"));
2734
2735   /* Do this first, which means that if an "invalidate"
2736    * occurs during any of this process, a new first_validate_callback
2737    * will be installed, and we'll start again.
2738    */
2739   text_view->first_validate_idle = 0;
2740
2741   /* be sure we have up-to-date screen size set on the
2742    * layout.
2743    */
2744   gtk_text_view_update_layout_width (text_view);
2745
2746   /* Bail out if we invalidated stuff; scrolling right away will just
2747    * confuse the issue.
2748    */
2749   if (text_view->first_validate_idle != 0)
2750     {
2751       DV(g_print(">Width change forced requeue ("G_STRLOC")\n"));
2752     }
2753   else
2754     {
2755       /* scroll to any marks, if that's pending. This can
2756        * jump us to the validation codepath used for scrolling
2757        * onscreen, if so we bail out.
2758        */
2759       if (!gtk_text_view_flush_scroll (text_view))
2760         gtk_text_view_validate_onscreen (text_view);
2761
2762       DV(g_print(">Leaving first validate idle ("G_STRLOC")\n"));
2763
2764       g_assert (text_view->onscreen_validated);
2765
2766     }
2767
2768   GDK_THREADS_LEAVE ();
2769
2770   return FALSE;
2771 }
2772
2773 static gboolean
2774 incremental_validate_callback (gpointer data)
2775 {
2776   GtkTextView *text_view = data;
2777   gboolean result = TRUE;
2778
2779   GDK_THREADS_ENTER ();
2780
2781   DV(g_print(G_STRLOC"\n"));
2782
2783   gtk_text_layout_validate (text_view->layout, 2000);
2784
2785   gtk_text_view_update_adjustments (text_view);
2786
2787   if (gtk_text_layout_is_valid (text_view->layout))
2788     {
2789       text_view->incremental_validate_idle = 0;
2790       result = FALSE;
2791     }
2792
2793   GDK_THREADS_LEAVE ();
2794
2795   return result;
2796 }
2797
2798 static void
2799 invalidated_handler (GtkTextLayout *layout,
2800                      gpointer       data)
2801 {
2802   GtkTextView *text_view;
2803
2804   text_view = GTK_TEXT_VIEW (data);
2805
2806   text_view->onscreen_validated = FALSE;
2807
2808   DV(g_print(">Invalidate, onscreen_validated = FALSE ("G_STRLOC")\n"));
2809
2810   if (!text_view->first_validate_idle)
2811     {
2812       text_view->first_validate_idle = g_idle_add_full (GTK_PRIORITY_RESIZE - 2, first_validate_callback, text_view, NULL);
2813       DV (g_print (G_STRLOC": adding first validate idle %d\n",
2814                    text_view->first_validate_idle));
2815     }
2816
2817   if (!text_view->incremental_validate_idle)
2818     {
2819       text_view->incremental_validate_idle = g_idle_add_full (GTK_TEXT_VIEW_PRIORITY_VALIDATE, incremental_validate_callback, text_view, NULL);
2820       DV (g_print (G_STRLOC": adding incremental validate idle %d\n",
2821                    text_view->incremental_validate_idle));
2822     }
2823 }
2824
2825 static void
2826 changed_handler (GtkTextLayout     *layout,
2827                  gint               start_y,
2828                  gint               old_height,
2829                  gint               new_height,
2830                  gpointer           data)
2831 {
2832   GtkTextView *text_view;
2833   GtkWidget *widget;
2834   GdkRectangle visible_rect;
2835   GdkRectangle redraw_rect;
2836
2837   text_view = GTK_TEXT_VIEW (data);
2838   widget = GTK_WIDGET (data);
2839
2840   DV(g_print(">Lines Validated ("G_STRLOC")\n"));
2841
2842   if (GTK_WIDGET_REALIZED (text_view))
2843     {
2844       gtk_text_view_get_visible_rect (text_view, &visible_rect);
2845
2846       redraw_rect.x = visible_rect.x;
2847       redraw_rect.width = visible_rect.width;
2848       redraw_rect.y = start_y;
2849
2850       if (old_height == new_height)
2851         redraw_rect.height = old_height;
2852       else
2853         redraw_rect.height = MAX (0, visible_rect.y + visible_rect.height - start_y);
2854
2855       if (gdk_rectangle_intersect (&redraw_rect, &visible_rect, &redraw_rect))
2856         {
2857           /* text_window_invalidate_rect() takes buffer coordinates */
2858           text_window_invalidate_rect (text_view->text_window,
2859                                        &redraw_rect);
2860
2861           DV(g_print(" invalidated rect: %d,%d %d x %d\n",
2862                      redraw_rect.x,
2863                      redraw_rect.y,
2864                      redraw_rect.width,
2865                      redraw_rect.height));
2866
2867           if (text_view->left_window)
2868             text_window_invalidate_rect (text_view->left_window,
2869                                          &redraw_rect);
2870           if (text_view->right_window)
2871             text_window_invalidate_rect (text_view->right_window,
2872                                          &redraw_rect);
2873           if (text_view->top_window)
2874             text_window_invalidate_rect (text_view->top_window,
2875                                          &redraw_rect);
2876           if (text_view->bottom_window)
2877             text_window_invalidate_rect (text_view->bottom_window,
2878                                          &redraw_rect);
2879         }
2880     }
2881
2882   if (old_height != new_height)
2883     {
2884       gboolean yoffset_changed = FALSE;
2885       GSList *tmp_list;
2886       int new_first_para_top;
2887       int old_first_para_top;
2888       GtkTextIter first;
2889
2890       /* If the bottom of the old area was above the top of the
2891        * screen, we need to scroll to keep the current top of the
2892        * screen in place.  Remember that first_para_pixels is the
2893        * position of the top of the screen in coordinates relative to
2894        * the first paragraph onscreen.
2895        *
2896        * In short we are adding the height delta of the portion of the
2897        * changed region above first_para_mark to text_view->yoffset.
2898        */
2899       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &first,
2900                                         text_view->first_para_mark);
2901
2902       gtk_text_layout_get_line_yrange (layout, &first, &new_first_para_top, NULL);
2903
2904       old_first_para_top = text_view->yoffset - text_view->first_para_pixels;
2905
2906       if (new_first_para_top != old_first_para_top)
2907         {
2908           text_view->yoffset += new_first_para_top - old_first_para_top;
2909
2910           get_vadjustment (text_view)->value = text_view->yoffset;
2911           yoffset_changed = TRUE;
2912         }
2913
2914       if (yoffset_changed)
2915         gtk_adjustment_value_changed (get_vadjustment (text_view));
2916
2917       /* FIXME be smarter about which anchored widgets we update */
2918
2919       tmp_list = text_view->children;
2920       while (tmp_list != NULL)
2921         {
2922           GtkTextViewChild *child = tmp_list->data;
2923
2924           if (child->anchor)
2925             gtk_text_view_update_child_allocation (text_view, child);
2926
2927           tmp_list = g_slist_next (tmp_list);
2928         }
2929     }
2930
2931   gtk_widget_queue_resize (widget);
2932 }
2933
2934 static void
2935 gtk_text_view_realize_cursor_gc (GtkTextView *text_view)
2936 {
2937   GdkColor *cursor_color;
2938   GdkColor red = { 0, 0xffff, 0x0000, 0x0000 };
2939
2940   if (text_view->cursor_gc)
2941     gdk_gc_unref (text_view->cursor_gc);
2942
2943   gtk_widget_style_get (GTK_WIDGET (text_view), "cursor_color", &cursor_color, NULL);
2944
2945   if (!cursor_color)
2946     cursor_color = &red;
2947
2948   text_view->cursor_gc = gdk_gc_new (text_view->text_window->bin_window);
2949   gdk_gc_set_rgb_fg_color (text_view->cursor_gc, cursor_color);
2950 }
2951
2952 static void
2953 gtk_text_view_realize (GtkWidget *widget)
2954 {
2955   GtkTextView *text_view;
2956   GdkWindowAttr attributes;
2957   gint attributes_mask;
2958
2959   text_view = GTK_TEXT_VIEW (widget);
2960   GTK_WIDGET_SET_FLAGS (text_view, GTK_REALIZED);
2961
2962   attributes.window_type = GDK_WINDOW_CHILD;
2963   attributes.x = widget->allocation.x;
2964   attributes.y = widget->allocation.y;
2965   attributes.width = widget->allocation.width;
2966   attributes.height = widget->allocation.height;
2967   attributes.wclass = GDK_INPUT_OUTPUT;
2968   attributes.visual = gtk_widget_get_visual (widget);
2969   attributes.colormap = gtk_widget_get_colormap (widget);
2970   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK | GDK_EXPOSURE_MASK;
2971
2972   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
2973
2974   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
2975                                    &attributes, attributes_mask);
2976   gdk_window_set_user_data (widget->window, widget);
2977
2978   /* must come before text_window_realize calls */
2979   widget->style = gtk_style_attach (widget->style, widget->window);
2980
2981   gdk_window_set_background (widget->window,
2982                              &widget->style->bg[GTK_WIDGET_STATE (widget)]);
2983
2984   text_window_realize (text_view->text_window, widget->window);
2985
2986   if (text_view->left_window)
2987     text_window_realize (text_view->left_window,
2988                          widget->window);
2989
2990   if (text_view->top_window)
2991     text_window_realize (text_view->top_window,
2992                          widget->window);
2993
2994   if (text_view->right_window)
2995     text_window_realize (text_view->right_window,
2996                          widget->window);
2997
2998   if (text_view->bottom_window)
2999     text_window_realize (text_view->bottom_window,
3000                          widget->window);
3001
3002   gtk_text_view_realize_cursor_gc (text_view);
3003
3004   gtk_text_view_ensure_layout (text_view);
3005
3006   if (text_view->buffer)
3007     gtk_text_buffer_add_selection_clipboard (text_view->buffer,
3008                                              gtk_clipboard_get (GDK_SELECTION_PRIMARY));
3009 }
3010
3011 static void
3012 gtk_text_view_unrealize (GtkWidget *widget)
3013 {
3014   GtkTextView *text_view;
3015
3016   text_view = GTK_TEXT_VIEW (widget);
3017
3018   if (text_view->buffer)
3019     gtk_text_buffer_remove_selection_clipboard (text_view->buffer,
3020                                                 gtk_clipboard_get (GDK_SELECTION_PRIMARY));
3021
3022   if (text_view->cursor_gc)
3023     {
3024       gdk_gc_unref (text_view->cursor_gc);
3025       text_view->cursor_gc = NULL;
3026     }
3027
3028   if (text_view->first_validate_idle)
3029     {
3030       g_source_remove (text_view->first_validate_idle);
3031       text_view->first_validate_idle = 0;
3032     }
3033
3034   if (text_view->incremental_validate_idle)
3035     {
3036       g_source_remove (text_view->incremental_validate_idle);
3037       text_view->incremental_validate_idle = 0;
3038     }
3039
3040   if (text_view->popup_menu)
3041     {
3042       gtk_widget_destroy (text_view->popup_menu);
3043       text_view->popup_menu = NULL;
3044     }
3045
3046   text_window_unrealize (text_view->text_window);
3047
3048   if (text_view->left_window)
3049     text_window_unrealize (text_view->left_window);
3050
3051   if (text_view->top_window)
3052     text_window_unrealize (text_view->top_window);
3053
3054   if (text_view->right_window)
3055     text_window_unrealize (text_view->right_window);
3056
3057   if (text_view->bottom_window)
3058     text_window_unrealize (text_view->bottom_window);
3059
3060   gtk_text_view_destroy_layout (text_view);
3061
3062   (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
3063 }
3064
3065 static void
3066 gtk_text_view_style_set (GtkWidget *widget,
3067                          GtkStyle  *previous_style)
3068 {
3069   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3070
3071   if (GTK_WIDGET_REALIZED (widget))
3072     {
3073       gdk_window_set_background (widget->window,
3074                                  &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3075
3076       gdk_window_set_background (text_view->text_window->bin_window,
3077                                  &widget->style->base[GTK_WIDGET_STATE (widget)]);
3078
3079       if (text_view->left_window)
3080         gdk_window_set_background (text_view->left_window->bin_window,
3081                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3082       if (text_view->right_window)
3083         gdk_window_set_background (text_view->right_window->bin_window,
3084                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3085
3086       if (text_view->top_window)
3087         gdk_window_set_background (text_view->top_window->bin_window,
3088                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3089
3090       if (text_view->bottom_window)
3091         gdk_window_set_background (text_view->bottom_window->bin_window,
3092                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3093
3094       gtk_text_view_realize_cursor_gc (text_view);
3095     }
3096
3097   if (text_view->layout && previous_style)
3098     {
3099       gtk_text_view_set_attributes_from_style (text_view,
3100                                                text_view->layout->default_style,
3101                                                widget->style);
3102       gtk_text_layout_default_style_changed (text_view->layout);
3103     }
3104 }
3105
3106 static void
3107 gtk_text_view_direction_changed (GtkWidget        *widget,
3108                                  GtkTextDirection  previous_direction)
3109 {
3110   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3111
3112   if (text_view->layout)
3113     {
3114       text_view->layout->default_style->direction = gtk_widget_get_direction (widget);
3115       gtk_text_layout_default_style_changed (text_view->layout);
3116     }
3117 }
3118
3119 /*
3120  * Events
3121  */
3122
3123 static gboolean
3124 get_event_coordinates (GdkEvent *event, gint *x, gint *y)
3125 {
3126   if (event)
3127     switch (event->type)
3128       {
3129       case GDK_MOTION_NOTIFY:
3130         *x = event->motion.x;
3131         *y = event->motion.y;
3132         return TRUE;
3133         break;
3134
3135       case GDK_BUTTON_PRESS:
3136       case GDK_2BUTTON_PRESS:
3137       case GDK_3BUTTON_PRESS:
3138       case GDK_BUTTON_RELEASE:
3139         *x = event->button.x;
3140         *y = event->button.y;
3141         return TRUE;
3142         break;
3143
3144       case GDK_KEY_PRESS:
3145       case GDK_KEY_RELEASE:
3146       case GDK_ENTER_NOTIFY:
3147       case GDK_LEAVE_NOTIFY:
3148       case GDK_PROPERTY_NOTIFY:
3149       case GDK_SELECTION_CLEAR:
3150       case GDK_SELECTION_REQUEST:
3151       case GDK_SELECTION_NOTIFY:
3152       case GDK_PROXIMITY_IN:
3153       case GDK_PROXIMITY_OUT:
3154       case GDK_DRAG_ENTER:
3155       case GDK_DRAG_LEAVE:
3156       case GDK_DRAG_MOTION:
3157       case GDK_DRAG_STATUS:
3158       case GDK_DROP_START:
3159       case GDK_DROP_FINISHED:
3160       default:
3161         return FALSE;
3162         break;
3163       }
3164
3165   return FALSE;
3166 }
3167
3168 static gint
3169 emit_event_on_tags (GtkWidget   *widget,
3170                     GdkEvent    *event,
3171                     GtkTextIter *iter)
3172 {
3173   GSList *tags;
3174   GSList *tmp;
3175   gboolean retval = FALSE;
3176   GtkTextView *text_view;
3177
3178   text_view = GTK_TEXT_VIEW (widget);
3179
3180   tags = gtk_text_iter_get_tags (iter);
3181
3182   tmp = tags;
3183   while (tmp != NULL)
3184     {
3185       GtkTextTag *tag = tmp->data;
3186
3187       if (gtk_text_tag_event (tag, G_OBJECT (widget), event, iter))
3188         {
3189           retval = TRUE;
3190           break;
3191         }
3192
3193       tmp = g_slist_next (tmp);
3194     }
3195
3196   g_slist_free (tags);
3197
3198   return retval;
3199 }
3200
3201 static gint
3202 gtk_text_view_event (GtkWidget *widget, GdkEvent *event)
3203 {
3204   GtkTextView *text_view;
3205   gint x = 0, y = 0;
3206
3207   text_view = GTK_TEXT_VIEW (widget);
3208
3209   if (text_view->layout == NULL ||
3210       get_buffer (text_view) == NULL)
3211     return FALSE;
3212
3213   if (event->any.window != text_view->text_window->bin_window)
3214     return FALSE;
3215
3216   if (get_event_coordinates (event, &x, &y))
3217     {
3218       GtkTextIter iter;
3219
3220       x += text_view->xoffset;
3221       y += text_view->yoffset;
3222
3223       /* FIXME this is slow and we do it twice per event.
3224        * My favorite solution is to have GtkTextLayout cache
3225        * the last couple lookups.
3226        */
3227       gtk_text_layout_get_iter_at_pixel (text_view->layout,
3228                                          &iter,
3229                                          x, y);
3230
3231       return emit_event_on_tags (widget, event, &iter);
3232     }
3233   else if (event->type == GDK_KEY_PRESS ||
3234            event->type == GDK_KEY_RELEASE)
3235     {
3236       GtkTextMark *insert;
3237       GtkTextIter iter;
3238
3239       insert = gtk_text_buffer_get_mark (get_buffer (text_view),
3240                                          "insert");
3241
3242       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
3243
3244       return emit_event_on_tags (widget, event, &iter);
3245     }
3246   else
3247     return FALSE;
3248 }
3249
3250 static gint
3251 gtk_text_view_key_press_event (GtkWidget *widget, GdkEventKey *event)
3252 {
3253   gboolean retval = FALSE;
3254   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3255   GtkTextMark *insert;
3256   GtkTextIter iter;
3257
3258   if (text_view->layout == NULL ||
3259       get_buffer (text_view) == NULL)
3260     return FALSE;
3261
3262   insert = gtk_text_buffer_get_insert (get_buffer (text_view));
3263   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
3264   if (gtk_text_iter_can_insert (&iter, text_view->editable) &&
3265       gtk_im_context_filter_keypress (text_view->im_context, event))
3266     {
3267       text_view->need_im_reset = TRUE;
3268       retval = TRUE;
3269     }
3270   else if (GTK_WIDGET_CLASS (parent_class)->key_press_event &&
3271            GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, event))
3272     retval = TRUE;
3273   else if (event->keyval == GDK_Return ||
3274            event->keyval == GDK_KP_Enter)
3275     {
3276       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\n", 1,
3277                                                     text_view->editable);
3278       DV(g_print (G_STRLOC": scrolling to mark\n"));
3279       gtk_text_view_scroll_to_mark (text_view,
3280                                     gtk_text_buffer_get_mark (get_buffer (text_view),
3281                                                               "insert"),
3282                                     0.0, FALSE, 0.0, 0.0);
3283       retval = TRUE;
3284     }
3285   /* Pass through Tab as literal tab, unless Control is held down */
3286   else if ((event->keyval == GDK_Tab ||
3287             event->keyval == GDK_KP_Tab ||
3288             event->keyval == GDK_ISO_Left_Tab) &&
3289            !(event->state & GDK_CONTROL_MASK))
3290     {
3291       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\t", 1,
3292                                                     text_view->editable);
3293       DV(g_print (G_STRLOC": scrolling onscreen\n"));
3294       gtk_text_view_scroll_mark_onscreen (text_view,
3295                                           gtk_text_buffer_get_mark (get_buffer (text_view),
3296                                                                     "insert"));
3297       retval = TRUE;
3298     }
3299   else
3300     retval = FALSE;
3301
3302   gtk_text_view_pend_cursor_blink (text_view);
3303
3304   return retval;
3305 }
3306
3307 static gint
3308 gtk_text_view_key_release_event (GtkWidget *widget, GdkEventKey *event)
3309 {
3310   return FALSE;
3311 }
3312
3313 static gint
3314 gtk_text_view_button_press_event (GtkWidget *widget, GdkEventButton *event)
3315 {
3316   GtkTextView *text_view;
3317
3318   text_view = GTK_TEXT_VIEW (widget);
3319
3320   text_view->disable_scroll_on_focus = TRUE;
3321   gtk_widget_grab_focus (widget);
3322   text_view->disable_scroll_on_focus = FALSE;
3323
3324   if (event->window != text_view->text_window->bin_window)
3325     {
3326       /* Remove selection if any. */
3327       gtk_text_view_unselect (text_view);
3328       return FALSE;
3329     }
3330
3331 #if 0
3332   /* debug hack */
3333   if (event->button == 3 && (event->state & GDK_CONTROL_MASK) != 0)
3334     _gtk_text_buffer_spew (GTK_TEXT_VIEW (widget)->buffer);
3335   else if (event->button == 3)
3336     gtk_text_layout_spew (GTK_TEXT_VIEW (widget)->layout);
3337 #endif
3338
3339   if (event->type == GDK_BUTTON_PRESS)
3340     {
3341       gtk_text_view_reset_im_context (text_view);
3342
3343       if (event->button == 1)
3344         {
3345           /* If we're in the selection, start a drag copy/move of the
3346            * selection; otherwise, start creating a new selection.
3347            */
3348           GtkTextIter iter;
3349           GtkTextIter start, end;
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           if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
3357                                                     &start, &end) &&
3358               gtk_text_iter_in_range (&iter, &start, &end))
3359             {
3360               text_view->drag_start_x = event->x;
3361               text_view->drag_start_y = event->y;
3362               text_view->pending_place_cursor_button = event->button;
3363             }
3364           else
3365             {
3366               gtk_text_view_start_selection_drag (text_view, &iter, event);
3367             }
3368
3369           return TRUE;
3370         }
3371       else if (event->button == 2)
3372         {
3373           GtkTextIter iter;
3374
3375           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3376                                              &iter,
3377                                              event->x + text_view->xoffset,
3378                                              event->y + text_view->yoffset);
3379
3380           gtk_text_buffer_paste_clipboard (get_buffer (text_view),
3381                                            gtk_clipboard_get (GDK_SELECTION_PRIMARY),
3382                                            &iter,
3383                                            text_view->editable);
3384           return TRUE;
3385         }
3386       else if (event->button == 3)
3387         {
3388           gtk_text_view_do_popup (text_view, event);
3389         }
3390     }
3391   else if ((event->type == GDK_2BUTTON_PRESS ||
3392             event->type == GDK_3BUTTON_PRESS) &&
3393            event->button == 1)
3394     {
3395       GtkTextIter start, end;
3396
3397       /* End the selection drag, otherwise we'd clear the new
3398        * word/line selection on button release
3399        */
3400       gtk_text_view_end_selection_drag (text_view, event);
3401
3402       gtk_text_layout_get_iter_at_pixel (text_view->layout,
3403                                          &start,
3404                                          event->x + text_view->xoffset,
3405                                          event->y + text_view->yoffset);
3406
3407       end = start;
3408
3409       if (event->type == GDK_2BUTTON_PRESS)
3410         {
3411           if (gtk_text_iter_inside_word (&start))
3412             {
3413               if (!gtk_text_iter_starts_word (&start))
3414                 gtk_text_iter_backward_word_start (&start);
3415
3416               if (!gtk_text_iter_ends_word (&end))
3417                 gtk_text_iter_forward_word_end (&end);
3418             }
3419         }
3420       else if (event->type == GDK_3BUTTON_PRESS)
3421         {
3422           if (gtk_text_view_starts_display_line (text_view, &start))
3423             {
3424               /* If on a display line boundary, we assume the user
3425                * clicked off the end of a line and we therefore select
3426                * the line before the boundary.
3427                */
3428               gtk_text_view_backward_display_line_start (text_view, &start);
3429             }
3430           else
3431             {
3432               /* start isn't on the start of a line, so we move it to the
3433                * start, and move end to the end unless it's already there.
3434                */
3435               gtk_text_view_backward_display_line_start (text_view, &start);
3436
3437               if (!gtk_text_view_starts_display_line (text_view, &end))
3438                 gtk_text_view_forward_display_line_end (text_view, &end);
3439             }
3440         }
3441
3442       gtk_text_buffer_move_mark (get_buffer (text_view),
3443                                  gtk_text_buffer_get_selection_bound (get_buffer (text_view)),
3444                                  &start);
3445       gtk_text_buffer_move_mark (get_buffer (text_view),
3446                                  gtk_text_buffer_get_insert (get_buffer (text_view)),
3447                                  &end);
3448
3449       text_view->just_selected_element = TRUE;
3450
3451       return TRUE;
3452     }
3453
3454   return FALSE;
3455 }
3456
3457 static gint
3458 gtk_text_view_button_release_event (GtkWidget *widget, GdkEventButton *event)
3459 {
3460   GtkTextView *text_view;
3461
3462   text_view = GTK_TEXT_VIEW (widget);
3463
3464   if (event->window != text_view->text_window->bin_window)
3465     return FALSE;
3466
3467   if (event->button == 1)
3468     {
3469       if (text_view->drag_start_x >= 0)
3470         {
3471           text_view->drag_start_x = -1;
3472           text_view->drag_start_y = -1;
3473         }
3474
3475       if (gtk_text_view_end_selection_drag (GTK_TEXT_VIEW (widget), event))
3476         return TRUE;
3477       else if (text_view->just_selected_element)
3478         {
3479           text_view->just_selected_element = FALSE;
3480           return FALSE;
3481         }
3482       else if (text_view->pending_place_cursor_button == event->button)
3483         {
3484           GtkTextIter iter;
3485
3486           /* Unselect everything; we clicked inside selection, but
3487            * didn't move by the drag threshold, so just clear selection
3488            * and place cursor.
3489            */
3490           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3491                                              &iter,
3492                                              event->x + text_view->xoffset,
3493                                              event->y + text_view->yoffset);
3494
3495           gtk_text_buffer_place_cursor (get_buffer (text_view), &iter);
3496
3497           text_view->pending_place_cursor_button = 0;
3498
3499           return FALSE;
3500         }
3501     }
3502
3503   return FALSE;
3504 }
3505
3506 static void
3507 keymap_direction_changed (GdkKeymap   *keymap,
3508                           GtkTextView *text_view)
3509 {
3510   gtk_text_view_check_keymap_direction (text_view);
3511 }
3512
3513 static gint
3514 gtk_text_view_focus_in_event (GtkWidget *widget, GdkEventFocus *event)
3515 {
3516   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3517
3518   GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3519   gtk_widget_queue_draw (widget);
3520
3521   DV(g_print (G_STRLOC": focus_in_event\n"));
3522
3523   if (text_view->cursor_visible && text_view->layout)
3524     {
3525       gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3526       gtk_text_view_check_cursor_blink (text_view);
3527     }
3528
3529   g_signal_connect (gdk_keymap_get_default (),
3530                     "direction_changed",
3531                     G_CALLBACK (keymap_direction_changed), text_view);
3532   gtk_text_view_check_keymap_direction (text_view);
3533
3534   text_view->need_im_reset = TRUE;
3535   gtk_im_context_focus_in (GTK_TEXT_VIEW (widget)->im_context);
3536
3537   return FALSE;
3538 }
3539
3540 static gint
3541 gtk_text_view_focus_out_event (GtkWidget *widget, GdkEventFocus *event)
3542 {
3543   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3544
3545   GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3546   gtk_widget_queue_draw (widget);
3547
3548   DV(g_print (G_STRLOC": focus_out_event\n"));
3549
3550   if (text_view->cursor_visible && text_view->layout)
3551     {
3552       gtk_text_layout_set_cursor_visible (text_view->layout, FALSE);
3553       gtk_text_view_check_cursor_blink (text_view);
3554     }
3555
3556   g_signal_handlers_disconnect_by_func (gdk_keymap_get_default (),
3557                                         keymap_direction_changed,
3558                                         text_view);
3559
3560   text_view->need_im_reset = TRUE;
3561   gtk_im_context_focus_out (GTK_TEXT_VIEW (widget)->im_context);
3562
3563   return FALSE;
3564 }
3565
3566 static gint
3567 gtk_text_view_motion_event (GtkWidget *widget, GdkEventMotion *event)
3568 {
3569   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3570
3571   if (event->window == text_view->text_window->bin_window &&
3572       text_view->drag_start_x >= 0)
3573     {
3574       gint x, y;
3575
3576       gdk_window_get_pointer (text_view->text_window->bin_window,
3577                               &x, &y, NULL);
3578
3579       if (gtk_drag_check_threshold (widget,
3580                                     text_view->drag_start_x,
3581                                     text_view->drag_start_y,
3582                                     x, y))
3583         {
3584           GtkTextIter iter;
3585           gint buffer_x, buffer_y;
3586
3587           gtk_text_view_window_to_buffer_coords (text_view,
3588                                                  GTK_TEXT_WINDOW_TEXT,
3589                                                  text_view->drag_start_x,
3590                                                  text_view->drag_start_y,
3591                                                  &buffer_x,
3592                                                  &buffer_y);
3593
3594           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3595                                              &iter,
3596                                              buffer_x, buffer_y);
3597
3598           gtk_text_view_start_selection_dnd (text_view, &iter, event);
3599           return TRUE;
3600         }
3601     }
3602
3603   return FALSE;
3604 }
3605
3606 static void
3607 gtk_text_view_paint (GtkWidget *widget, GdkRectangle *area)
3608 {
3609   GtkTextView *text_view;
3610
3611   text_view = GTK_TEXT_VIEW (widget);
3612
3613   g_return_if_fail (text_view->layout != NULL);
3614   g_return_if_fail (text_view->xoffset >= 0);
3615   g_return_if_fail (text_view->yoffset >= 0);
3616
3617   DV (g_print (G_STRLOC": first_validate_idle: %d\n",
3618                text_view->first_validate_idle));
3619
3620   if (!text_view->onscreen_validated)
3621     {
3622       G_BREAKPOINT ();
3623       g_warning (G_STRLOC ": somehow some text lines were modified or scrolling occurred since the last validation of lines on the screen");
3624     }
3625
3626 #if 0
3627   printf ("painting %d,%d  %d x %d\n",
3628           area->x, area->y,
3629           area->width, area->height);
3630 #endif
3631
3632   gtk_text_layout_draw (text_view->layout,
3633                         widget,
3634                         text_view->text_window->bin_window,
3635                         text_view->cursor_gc,
3636                         text_view->xoffset,
3637                         text_view->yoffset,
3638                         area->x, area->y,
3639                         area->width, area->height);
3640 }
3641
3642 static gint
3643 gtk_text_view_expose_event (GtkWidget *widget, GdkEventExpose *event)
3644 {
3645 #if 0
3646   {
3647     GdkWindow *win = event->window;
3648     GdkColor color = { 0, 0, 0, 65535 };
3649     GdkGC *gc = gdk_gc_new (win);
3650     gdk_gc_set_rgb_fg_color (gc, &color);
3651     gdk_draw_rectangle (win,
3652                         gc, TRUE,
3653                         event->area.x, event->area.y,
3654                         event->area.width, event->area.height);
3655     gdk_gc_unref (gc);
3656   }
3657 #endif
3658
3659   if (event->window == gtk_text_view_get_window (GTK_TEXT_VIEW (widget),
3660                                                  GTK_TEXT_WINDOW_TEXT))
3661     {
3662       DV(g_print (">Exposed ("G_STRLOC")\n"));
3663       gtk_text_view_paint (widget, &event->area);
3664     }
3665
3666   if (event->window == widget->window)
3667     gtk_text_view_draw_focus (widget);
3668
3669   return TRUE;
3670 }
3671
3672 static void
3673 gtk_text_view_draw_focus (GtkWidget *widget)
3674 {
3675   gboolean interior_focus;
3676
3677   /* We clear the focus if we are in interior focus mode. */
3678   gtk_widget_style_get (widget, "interior_focus", &interior_focus, NULL);
3679
3680   if (GTK_WIDGET_DRAWABLE (widget))
3681     {
3682       if (GTK_WIDGET_HAS_FOCUS (widget) && !interior_focus)
3683         {
3684           gtk_paint_focus (widget->style, widget->window,
3685                            NULL, widget, "textview",
3686                            0, 0,
3687                            widget->allocation.width - 1,
3688                            widget->allocation.height - 1);
3689         }
3690       else
3691         {
3692           gdk_window_clear (widget->window);
3693         }
3694     }
3695 }
3696
3697 static void
3698 gtk_text_view_grab_focus (GtkWidget *widget)
3699 {
3700   GtkTextView *text_view;
3701
3702   text_view = GTK_TEXT_VIEW (widget);
3703
3704   GTK_WIDGET_CLASS (parent_class)->grab_focus (widget);
3705
3706   if (!text_view->disable_scroll_on_focus)
3707     gtk_text_view_scroll_mark_onscreen (text_view,
3708                                         gtk_text_buffer_get_mark (get_buffer (text_view),
3709                                                                   "insert"));
3710 }
3711
3712 /*
3713  * Container
3714  */
3715
3716 static void
3717 gtk_text_view_add (GtkContainer *container,
3718                    GtkWidget    *child)
3719 {
3720   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
3721   g_return_if_fail (GTK_IS_WIDGET (child));
3722
3723   /* This is pretty random. */
3724   gtk_text_view_add_child_in_window (GTK_TEXT_VIEW (container),
3725                                      child,
3726                                      GTK_TEXT_WINDOW_WIDGET,
3727                                      0, 0);
3728 }
3729
3730 static void
3731 gtk_text_view_remove (GtkContainer *container,
3732                       GtkWidget    *child)
3733 {
3734   GSList *iter;
3735   GtkTextView *text_view;
3736   GtkTextViewChild *vc;
3737
3738   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
3739   g_return_if_fail (GTK_IS_WIDGET (child));
3740   g_return_if_fail (child->parent == (GtkWidget*) container);
3741
3742   text_view = GTK_TEXT_VIEW (container);
3743
3744   vc = NULL;
3745   iter = text_view->children;
3746
3747   while (iter != NULL)
3748     {
3749       vc = iter->data;
3750
3751       if (vc->widget == child)
3752         break;
3753
3754       iter = g_slist_next (iter);
3755     }
3756
3757   g_assert (iter != NULL); /* be sure we had the child in the list */
3758
3759   text_view->children = g_slist_remove (text_view->children, vc);
3760
3761   gtk_widget_unparent (vc->widget);
3762
3763   text_view_child_free (vc);
3764 }
3765
3766 static void
3767 gtk_text_view_forall (GtkContainer *container,
3768                       gboolean      include_internals,
3769                       GtkCallback   callback,
3770                       gpointer      callback_data)
3771 {
3772   GSList *iter;
3773   GtkTextView *text_view;
3774
3775   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
3776   g_return_if_fail (callback != NULL);
3777
3778   text_view = GTK_TEXT_VIEW (container);
3779
3780   iter = text_view->children;
3781
3782   while (iter != NULL)
3783     {
3784       GtkTextViewChild *vc = iter->data;
3785
3786       (* callback) (vc->widget, callback_data);
3787
3788       iter = g_slist_next (iter);
3789     }
3790 }
3791
3792 #define CURSOR_ON_MULTIPLIER 0.66
3793 #define CURSOR_OFF_MULTIPLIER 0.34
3794 #define CURSOR_PEND_MULTIPLIER 1.0
3795
3796 static gboolean
3797 cursor_blinks (GtkTextView *text_view)
3798 {
3799   GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
3800   gboolean blink;
3801
3802 #ifdef DEBUG_VALIDATION_AND_SCROLLING
3803   return FALSE;
3804 #endif
3805   if (gtk_debug_flags & GTK_DEBUG_UPDATES)
3806     return FALSE;
3807
3808   g_object_get (G_OBJECT (settings), "gtk-cursor-blink", &blink, NULL);
3809   return blink;
3810 }
3811
3812 static gint
3813 get_cursor_time (GtkTextView *text_view)
3814 {
3815   GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
3816   gint time;
3817
3818   g_object_get (G_OBJECT (settings), "gtk-cursor-blink-time", &time, NULL);
3819
3820   return time;
3821 }
3822
3823 /*
3824  * Blink!
3825  */
3826
3827 static gint
3828 blink_cb (gpointer data)
3829 {
3830   GtkTextView *text_view;
3831   gboolean visible;
3832
3833   GDK_THREADS_ENTER ();
3834
3835   text_view = GTK_TEXT_VIEW (data);
3836
3837   g_assert (text_view->layout);
3838   g_assert (GTK_WIDGET_HAS_FOCUS (text_view));
3839   g_assert (text_view->cursor_visible);
3840
3841   visible = gtk_text_layout_get_cursor_visible (text_view->layout);
3842
3843   if (visible)
3844     text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_OFF_MULTIPLIER,
3845                                                 blink_cb,
3846                                                 text_view);
3847   else
3848     text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_ON_MULTIPLIER,
3849                                                 blink_cb,
3850                                                 text_view);
3851
3852   gtk_text_layout_set_cursor_visible (text_view->layout,
3853                                       !visible);
3854
3855   GDK_THREADS_LEAVE ();
3856
3857   /* Remove ourselves */
3858   return FALSE;
3859 }
3860
3861
3862 static void
3863 gtk_text_view_stop_cursor_blink (GtkTextView *text_view)
3864 {
3865   if (text_view->blink_timeout)
3866     {
3867       gtk_timeout_remove (text_view->blink_timeout);
3868       text_view->blink_timeout = 0;
3869     }
3870 }
3871
3872 static void
3873 gtk_text_view_check_cursor_blink (GtkTextView *text_view)
3874 {
3875   if (text_view->layout != NULL &&
3876       text_view->cursor_visible &&
3877       GTK_WIDGET_HAS_FOCUS (text_view))
3878     {
3879       if (cursor_blinks (text_view))
3880         {
3881           if (text_view->blink_timeout == 0)
3882             {
3883               gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3884
3885               text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_OFF_MULTIPLIER,
3886                                                           blink_cb,
3887                                                           text_view);
3888             }
3889         }
3890       else
3891         gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3892     }
3893   else
3894     {
3895       gtk_text_view_stop_cursor_blink (text_view);
3896     }
3897 }
3898
3899 static void
3900 gtk_text_view_pend_cursor_blink(GtkTextView *text_view)
3901 {
3902   if (text_view->layout != NULL &&
3903       text_view->cursor_visible &&
3904       GTK_WIDGET_HAS_FOCUS (text_view) &&
3905       cursor_blinks (text_view))
3906     {
3907       if (text_view->blink_timeout != 0)
3908         {
3909           gtk_timeout_remove (text_view->blink_timeout);
3910           text_view->blink_timeout = 0;
3911         }
3912
3913       gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3914
3915       text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_PEND_MULTIPLIER,
3916                                                   blink_cb,
3917                                                   text_view);
3918     }
3919 }
3920
3921
3922 /*
3923  * Key binding handlers
3924  */
3925
3926 static void
3927 gtk_text_view_move_iter_by_lines (GtkTextView *text_view,
3928                                   GtkTextIter *newplace,
3929                                   gint         count)
3930 {
3931   while (count < 0)
3932     {
3933       gtk_text_layout_move_iter_to_previous_line (text_view->layout, newplace);
3934       count++;
3935     }
3936
3937   while (count > 0)
3938     {
3939       gtk_text_layout_move_iter_to_next_line (text_view->layout, newplace);
3940       count--;
3941     }
3942 }
3943
3944 static void
3945 gtk_text_view_move_cursor (GtkTextView     *text_view,
3946                            GtkMovementStep  step,
3947                            gint             count,
3948                            gboolean         extend_selection)
3949 {
3950   GtkTextIter insert;
3951   GtkTextIter newplace;
3952
3953   gint cursor_x_pos = 0;
3954
3955   gtk_text_view_reset_im_context (text_view);
3956
3957   if (step == GTK_MOVEMENT_PAGES)
3958     {
3959       gtk_text_view_scroll_pages (text_view, count);
3960       gtk_text_view_pend_cursor_blink (text_view);
3961       return;
3962     }
3963
3964   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
3965                                     gtk_text_buffer_get_mark (get_buffer (text_view),
3966                                                               "insert"));
3967   newplace = insert;
3968
3969   if (step == GTK_MOVEMENT_DISPLAY_LINES)
3970     gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, NULL);
3971
3972   switch (step)
3973     {
3974     case GTK_MOVEMENT_LOGICAL_POSITIONS:
3975       gtk_text_iter_forward_cursor_positions (&newplace, count);
3976       break;
3977
3978     case GTK_MOVEMENT_VISUAL_POSITIONS:
3979       gtk_text_layout_move_iter_visually (text_view->layout,
3980                                           &newplace, count);
3981       break;
3982
3983     case GTK_MOVEMENT_WORDS:
3984       if (count < 0)
3985         gtk_text_iter_backward_word_starts (&newplace, -count);
3986       else if (count > 0)
3987         gtk_text_iter_forward_word_ends (&newplace, count);
3988       break;
3989
3990     case GTK_MOVEMENT_DISPLAY_LINES:
3991       gtk_text_view_move_iter_by_lines (text_view, &newplace, count);
3992       gtk_text_layout_move_iter_to_x (text_view->layout, &newplace, cursor_x_pos);
3993       break;
3994
3995     case GTK_MOVEMENT_DISPLAY_LINE_ENDS:
3996       if (count > 1)
3997         gtk_text_view_move_iter_by_lines (text_view, &newplace, --count);
3998       else if (count < -1)
3999         gtk_text_view_move_iter_by_lines (text_view, &newplace, ++count);
4000
4001       if (count != 0)
4002         gtk_text_layout_move_iter_to_line_end (text_view->layout, &newplace, count);
4003       break;
4004
4005     case GTK_MOVEMENT_PARAGRAPHS:
4006       gtk_text_iter_forward_lines (&newplace, count);
4007       gtk_text_iter_set_line_offset (&newplace, 0);
4008       break;
4009
4010     case GTK_MOVEMENT_PARAGRAPH_ENDS:
4011       if (count > 0)
4012         gtk_text_iter_forward_to_line_end (&newplace);
4013       else if (count < 0)
4014         gtk_text_iter_set_line_offset (&newplace, 0);
4015       break;
4016
4017     case GTK_MOVEMENT_BUFFER_ENDS:
4018       if (count > 0)
4019         gtk_text_buffer_get_end_iter (get_buffer (text_view), &newplace);
4020       else if (count < 0)
4021         gtk_text_buffer_get_iter_at_offset (get_buffer (text_view), &newplace, 0);
4022       break;
4023
4024     default:
4025       break;
4026     }
4027
4028   if (!gtk_text_iter_equal (&insert, &newplace))
4029     {
4030       if (extend_selection)
4031         gtk_text_buffer_move_mark (get_buffer (text_view),
4032                                    gtk_text_buffer_get_mark (get_buffer (text_view),
4033                                                              "insert"),
4034                                    &newplace);
4035       else
4036         gtk_text_buffer_place_cursor (get_buffer (text_view), &newplace);
4037
4038       DV(g_print (G_STRLOC": scrolling onscreen\n"));
4039       gtk_text_view_scroll_mark_onscreen (text_view,
4040                                           gtk_text_buffer_get_mark (get_buffer (text_view),
4041                                                                     "insert"));
4042
4043       if (step == GTK_MOVEMENT_DISPLAY_LINES)
4044         {
4045           gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, -1);
4046         }
4047     }
4048
4049   gtk_text_view_pend_cursor_blink (text_view);
4050 }
4051
4052 static void
4053 gtk_text_view_set_anchor (GtkTextView *text_view)
4054 {
4055   GtkTextIter insert;
4056
4057   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
4058                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4059                                                               "insert"));
4060
4061   gtk_text_buffer_create_mark (get_buffer (text_view), "anchor", &insert, TRUE);
4062 }
4063
4064 static void
4065 gtk_text_view_scroll_pages (GtkTextView *text_view,
4066                             gint         count)
4067 {
4068   gdouble newval;
4069   GtkAdjustment *adj;
4070   gint cursor_x_pos, cursor_y_pos;
4071   GtkTextIter new_insert;
4072   GtkTextIter anchor;
4073   gint y0, y1;
4074
4075   g_return_if_fail (text_view->vadjustment != NULL);
4076
4077   adj = text_view->vadjustment;
4078
4079   /* Validate the region that will be brought into view by the cursor motion
4080    */
4081   if (count < 0)
4082     {
4083       gtk_text_view_get_first_para_iter (text_view, &anchor);
4084       y0 = adj->page_size;
4085       y1 = adj->page_size + count * adj->page_increment;
4086     }
4087   else
4088     {
4089       gtk_text_view_get_first_para_iter (text_view, &anchor);
4090       y0 = count * adj->page_increment + adj->page_size;
4091       y1 = 0;
4092     }
4093
4094   gtk_text_layout_validate_yrange (text_view->layout, &anchor, y0, y1);
4095   /* FIXME do we need to update the adjustment ranges here? */
4096
4097   gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, &cursor_y_pos);
4098
4099   newval = adj->value;
4100
4101   newval += count * adj->page_increment;
4102
4103   cursor_y_pos += newval - adj->value;
4104   set_adjustment_clamped (adj, newval);
4105
4106   gtk_text_layout_get_iter_at_pixel (text_view->layout, &new_insert, cursor_x_pos, cursor_y_pos);
4107   clamp_iter_onscreen (text_view, &new_insert);
4108   gtk_text_buffer_place_cursor (get_buffer (text_view), &new_insert);
4109
4110   gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, cursor_y_pos);
4111
4112   /* Adjust to have the cursor _entirely_ onscreen, move_mark_onscreen
4113    * only guarantees 1 pixel onscreen.
4114    */
4115   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4116   gtk_text_view_scroll_mark_onscreen (text_view,
4117                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4118                                                                 "insert"));
4119 }
4120
4121 static gboolean
4122 whitespace (gunichar ch, gpointer user_data)
4123 {
4124   return (ch == ' ' || ch == '\t');
4125 }
4126
4127 static gboolean
4128 not_whitespace (gunichar ch, gpointer user_data)
4129 {
4130   return !whitespace (ch, user_data);
4131 }
4132
4133 static gboolean
4134 find_whitepace_region (const GtkTextIter *center,
4135                        GtkTextIter *start, GtkTextIter *end)
4136 {
4137   *start = *center;
4138   *end = *center;
4139
4140   if (gtk_text_iter_backward_find_char (start, not_whitespace, NULL, NULL))
4141     gtk_text_iter_forward_char (start); /* we want the first whitespace... */
4142   if (whitespace (gtk_text_iter_get_char (end), NULL))
4143     gtk_text_iter_forward_find_char (end, not_whitespace, NULL, NULL);
4144
4145   return !gtk_text_iter_equal (start, end);
4146 }
4147
4148 static void
4149 gtk_text_view_insert_at_cursor (GtkTextView *text_view,
4150                                 const gchar *str)
4151 {
4152   gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
4153                                                 text_view->editable);
4154 }
4155
4156 static void
4157 gtk_text_view_delete_from_cursor (GtkTextView   *text_view,
4158                                   GtkDeleteType  type,
4159                                   gint           count)
4160 {
4161   GtkTextIter insert;
4162   GtkTextIter start;
4163   GtkTextIter end;
4164   gboolean leave_one = FALSE;
4165
4166   gtk_text_view_reset_im_context (text_view);
4167
4168   if (type == GTK_DELETE_CHARS)
4169     {
4170       /* Char delete deletes the selection, if one exists */
4171       if (gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
4172                                             text_view->editable))
4173         return;
4174     }
4175
4176   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4177                                     &insert,
4178                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4179                                                               "insert"));
4180
4181   start = insert;
4182   end = insert;
4183
4184   switch (type)
4185     {
4186     case GTK_DELETE_CHARS:
4187       gtk_text_iter_forward_cursor_positions (&end, count);
4188       break;
4189
4190     case GTK_DELETE_WORD_ENDS:
4191       if (count > 0)
4192         gtk_text_iter_forward_word_ends (&end, count);
4193       else if (count < 0)
4194         gtk_text_iter_backward_word_starts (&start, 0 - count);
4195       break;
4196
4197     case GTK_DELETE_WORDS:
4198       break;
4199
4200     case GTK_DELETE_DISPLAY_LINE_ENDS:
4201       break;
4202
4203     case GTK_DELETE_DISPLAY_LINES:
4204       break;
4205
4206     case GTK_DELETE_PARAGRAPH_ENDS:
4207       /* If we're already at a newline, we need to
4208        * simply delete that newline, instead of
4209        * moving to the next one.
4210        */
4211       if (gtk_text_iter_ends_line (&end))
4212         {
4213           gtk_text_iter_forward_line (&end);
4214           --count;
4215         }
4216
4217       while (count > 0)
4218         {
4219           if (!gtk_text_iter_forward_to_line_end (&end))
4220             break;
4221
4222           --count;
4223         }
4224
4225       /* FIXME figure out what a negative count means
4226          and support that */
4227       break;
4228
4229     case GTK_DELETE_PARAGRAPHS:
4230       if (count > 0)
4231         {
4232           gtk_text_iter_set_line_offset (&start, 0);
4233           gtk_text_iter_forward_to_line_end (&end);
4234
4235           /* Do the lines beyond the first. */
4236           while (count > 1)
4237             {
4238               gtk_text_iter_forward_to_line_end (&end);
4239
4240               --count;
4241             }
4242         }
4243
4244       /* FIXME negative count? */
4245
4246       break;
4247
4248     case GTK_DELETE_WHITESPACE:
4249       {
4250         find_whitepace_region (&insert, &start, &end);
4251       }
4252       break;
4253
4254     default:
4255       break;
4256     }
4257
4258   if (!gtk_text_iter_equal (&start, &end))
4259     {
4260       gtk_text_buffer_begin_user_action (get_buffer (text_view));
4261
4262       if (gtk_text_buffer_delete_interactive (get_buffer (text_view), &start, &end,
4263                                               text_view->editable))
4264         {
4265           if (leave_one)
4266             gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view),
4267                                                           " ", 1,
4268                                                           text_view->editable);
4269         }
4270
4271       gtk_text_buffer_end_user_action (get_buffer (text_view));
4272
4273       DV(g_print (G_STRLOC": scrolling onscreen\n"));
4274       gtk_text_view_scroll_mark_onscreen (text_view,
4275                                           gtk_text_buffer_get_mark (get_buffer (text_view), "insert"));
4276     }
4277 }
4278
4279 static void
4280 gtk_text_view_cut_clipboard (GtkTextView *text_view)
4281 {
4282   gtk_text_buffer_cut_clipboard (get_buffer (text_view),
4283                                  gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
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_copy_clipboard (GtkTextView *text_view)
4293 {
4294   gtk_text_buffer_copy_clipboard (get_buffer (text_view),
4295                                   gtk_clipboard_get (GDK_SELECTION_CLIPBOARD));
4296   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4297   gtk_text_view_scroll_mark_onscreen (text_view,
4298                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4299                                                                 "insert"));
4300 }
4301
4302 static void
4303 gtk_text_view_paste_clipboard (GtkTextView *text_view)
4304 {
4305   gtk_text_buffer_paste_clipboard (get_buffer (text_view),
4306                                    gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
4307                                    NULL,
4308                                    text_view->editable);
4309   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4310   gtk_text_view_scroll_mark_onscreen (text_view,
4311                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4312                                                                 "insert"));
4313 }
4314
4315 static void
4316 gtk_text_view_toggle_overwrite (GtkTextView *text_view)
4317 {
4318   text_view->overwrite_mode = !text_view->overwrite_mode;
4319 }
4320
4321 /*
4322  * Selections
4323  */
4324
4325 static void
4326 gtk_text_view_unselect (GtkTextView *text_view)
4327 {
4328   GtkTextIter insert;
4329
4330   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4331                                     &insert,
4332                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4333                                                               "insert"));
4334
4335   gtk_text_buffer_move_mark (get_buffer (text_view),
4336                              gtk_text_buffer_get_mark (get_buffer (text_view),
4337                                                        "selection_bound"),
4338                              &insert);
4339 }
4340
4341 static void
4342 move_mark_to_pointer_and_scroll (GtkTextView *text_view,
4343                                  const gchar *mark_name)
4344 {
4345   gint x, y;
4346   GdkModifierType state;
4347   GtkTextIter newplace;
4348
4349   /*   DV(g_print (G_STRLOC": begin\n")); */
4350
4351   gdk_window_get_pointer (text_view->text_window->bin_window,
4352                           &x, &y, &state);
4353
4354   /*   DV(g_print (G_STRLOC": get iter at pixel\n"); */
4355   gtk_text_layout_get_iter_at_pixel (text_view->layout,
4356                                      &newplace,
4357                                      x + text_view->xoffset,
4358                                      y + text_view->yoffset);
4359
4360   {
4361     GtkTextMark *mark =
4362       gtk_text_buffer_get_mark (get_buffer (text_view), mark_name);
4363
4364     DV(g_print (G_STRLOC": move mark\n"));
4365     gtk_text_buffer_move_mark (get_buffer (text_view),
4366                                mark,
4367                                &newplace);
4368
4369     DV(g_print (G_STRLOC": scrolling onscreen\n"));
4370     gtk_text_view_scroll_mark_onscreen (text_view, mark);
4371   }
4372 }
4373
4374 static gint
4375 selection_scan_timeout (gpointer data)
4376 {
4377   GtkTextView *text_view;
4378
4379   GDK_THREADS_ENTER ();
4380
4381   text_view = GTK_TEXT_VIEW (data);
4382
4383   DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
4384   move_mark_to_pointer_and_scroll (text_view, "insert");
4385
4386   GDK_THREADS_LEAVE ();
4387
4388   return TRUE; /* remain installed. */
4389 }
4390
4391 #define DND_SCROLL_MARGIN 0.20
4392
4393 static gint
4394 drag_scan_timeout (gpointer data)
4395 {
4396   GtkTextView *text_view;
4397   gint x, y;
4398   GdkModifierType state;
4399   GtkTextIter newplace;
4400
4401   GDK_THREADS_ENTER ();
4402
4403   text_view = GTK_TEXT_VIEW (data);
4404
4405   gdk_window_get_pointer (text_view->text_window->bin_window,
4406                           &x, &y, &state);
4407
4408   gtk_text_layout_get_iter_at_pixel (text_view->layout,
4409                                      &newplace,
4410                                      x + text_view->xoffset,
4411                                      y + text_view->yoffset);
4412
4413   gtk_text_buffer_move_mark (get_buffer (text_view),
4414                              text_view->dnd_mark,
4415                              &newplace);
4416
4417   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4418   gtk_text_view_scroll_to_mark (text_view,
4419                                 text_view->dnd_mark,
4420                                 DND_SCROLL_MARGIN, FALSE, 0.0, 0.0);
4421
4422   GDK_THREADS_LEAVE ();
4423
4424   return TRUE;
4425 }
4426
4427 static gint
4428 selection_motion_event_handler (GtkTextView *text_view, GdkEventMotion *event, gpointer data)
4429 {
4430   DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
4431   move_mark_to_pointer_and_scroll (text_view, "insert");
4432
4433   /* If we had to scroll offscreen, insert a timeout to do so
4434    * again. Note that in the timeout, even if the mouse doesn't
4435    * move, due to this scroll xoffset/yoffset will have changed
4436    * and we'll need to scroll again.
4437    */
4438   if (text_view->scroll_timeout != 0) /* reset on every motion event */
4439     gtk_timeout_remove (text_view->scroll_timeout);
4440
4441   text_view->scroll_timeout =
4442     gtk_timeout_add (50, selection_scan_timeout, text_view);
4443
4444   return TRUE;
4445 }
4446
4447 static void
4448 gtk_text_view_start_selection_drag (GtkTextView       *text_view,
4449                                     const GtkTextIter *iter,
4450                                     GdkEventButton    *button)
4451 {
4452   GtkTextIter newplace;
4453
4454   g_return_if_fail (text_view->selection_drag_handler == 0);
4455
4456   gtk_grab_add (GTK_WIDGET (text_view));
4457
4458   newplace = *iter;
4459
4460   gtk_text_buffer_place_cursor (get_buffer (text_view), &newplace);
4461
4462   text_view->selection_drag_handler = gtk_signal_connect (GTK_OBJECT (text_view),
4463                                                           "motion_notify_event",
4464                                                           GTK_SIGNAL_FUNC (selection_motion_event_handler),
4465                                                           NULL);
4466 }
4467
4468 /* returns whether we were really dragging */
4469 static gboolean
4470 gtk_text_view_end_selection_drag (GtkTextView *text_view, GdkEventButton *event)
4471 {
4472   if (text_view->selection_drag_handler == 0)
4473     return FALSE;
4474
4475   gtk_signal_disconnect (GTK_OBJECT (text_view), text_view->selection_drag_handler);
4476   text_view->selection_drag_handler = 0;
4477
4478   if (text_view->scroll_timeout != 0)
4479     {
4480       gtk_timeout_remove (text_view->scroll_timeout);
4481       text_view->scroll_timeout = 0;
4482     }
4483
4484   /* one last update to current position */
4485   DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
4486   move_mark_to_pointer_and_scroll (text_view, "insert");
4487
4488   gtk_grab_remove (GTK_WIDGET (text_view));
4489
4490   return TRUE;
4491 }
4492
4493 /*
4494  * Layout utils
4495  */
4496
4497 static void
4498 gtk_text_view_set_attributes_from_style (GtkTextView        *text_view,
4499                                          GtkTextAttributes  *values,
4500                                          GtkStyle           *style)
4501 {
4502   values->appearance.bg_color = style->base[GTK_STATE_NORMAL];
4503   values->appearance.fg_color = style->text[GTK_STATE_NORMAL];
4504
4505   if (values->font)
4506     pango_font_description_free (values->font);
4507
4508   values->font = pango_font_description_copy (style->font_desc);
4509 }
4510
4511 static void
4512 gtk_text_view_check_keymap_direction (GtkTextView *text_view)
4513 {
4514   if (text_view->layout)
4515     {
4516       gboolean split_cursor;
4517       GtkTextDirection new_dir;
4518       GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
4519
4520       g_object_get (G_OBJECT (settings),
4521                     "gtk-split-cursor", &split_cursor,
4522                     NULL);
4523       if (split_cursor)
4524         new_dir = GTK_TEXT_DIR_NONE;
4525       else
4526         new_dir = (gdk_keymap_get_direction (gdk_keymap_get_default ()) == PANGO_DIRECTION_LTR) ?
4527           GTK_TEXT_DIR_LTR : GTK_TEXT_DIR_RTL;
4528
4529       if (text_view->layout->cursor_direction != new_dir)
4530         gtk_text_layout_set_cursor_direction (text_view->layout, new_dir);
4531     }
4532 }
4533
4534 static void
4535 gtk_text_view_ensure_layout (GtkTextView *text_view)
4536 {
4537   GtkWidget *widget;
4538
4539   widget = GTK_WIDGET (text_view);
4540
4541   if (text_view->layout == NULL)
4542     {
4543       GtkTextAttributes *style;
4544       PangoContext *ltr_context, *rtl_context;
4545       GSList *tmp_list;
4546
4547       DV(g_print(G_STRLOC"\n"));
4548
4549       text_view->layout = gtk_text_layout_new ();
4550
4551       g_signal_connect (G_OBJECT (text_view->layout),
4552                         "invalidated",
4553                         G_CALLBACK (invalidated_handler),
4554                         text_view);
4555
4556       g_signal_connect (G_OBJECT (text_view->layout),
4557                         "changed",
4558                         G_CALLBACK (changed_handler),
4559                         text_view);
4560
4561       g_signal_connect (G_OBJECT (text_view->layout),
4562                         "allocate_child",
4563                         G_CALLBACK (gtk_text_view_child_allocated),
4564                         text_view);
4565
4566       if (get_buffer (text_view))
4567         gtk_text_layout_set_buffer (text_view->layout, get_buffer (text_view));
4568
4569       if ((GTK_WIDGET_HAS_FOCUS (text_view) && text_view->cursor_visible))
4570         gtk_text_view_pend_cursor_blink (text_view);
4571       else
4572         gtk_text_layout_set_cursor_visible (text_view->layout, FALSE);
4573
4574       ltr_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
4575       pango_context_set_base_dir (ltr_context, PANGO_DIRECTION_LTR);
4576       rtl_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
4577       pango_context_set_base_dir (rtl_context, PANGO_DIRECTION_RTL);
4578
4579       gtk_text_layout_set_contexts (text_view->layout, ltr_context, rtl_context);
4580
4581       g_object_unref (G_OBJECT (ltr_context));
4582       g_object_unref (G_OBJECT (rtl_context));
4583
4584       gtk_text_view_check_keymap_direction (text_view);
4585
4586       style = gtk_text_attributes_new ();
4587
4588       gtk_widget_ensure_style (widget);
4589       gtk_text_view_set_attributes_from_style (text_view,
4590                                                style, widget->style);
4591
4592       style->pixels_above_lines = text_view->pixels_above_lines;
4593       style->pixels_below_lines = text_view->pixels_below_lines;
4594       style->pixels_inside_wrap = text_view->pixels_inside_wrap;
4595       style->left_margin = text_view->left_margin;
4596       style->right_margin = text_view->right_margin;
4597       style->indent = text_view->indent;
4598       style->tabs = text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
4599
4600       style->wrap_mode = text_view->wrap_mode;
4601       style->justification = text_view->justify;
4602       style->direction = gtk_widget_get_direction (GTK_WIDGET (text_view));
4603
4604       gtk_text_layout_set_default_style (text_view->layout, style);
4605
4606       gtk_text_attributes_unref (style);
4607
4608       /* Set layout for all anchored children */
4609
4610       tmp_list = text_view->children;
4611       while (tmp_list != NULL)
4612         {
4613           GtkTextViewChild *vc = tmp_list->data;
4614
4615           if (vc->anchor)
4616             {
4617               gtk_text_anchored_child_set_layout (vc->widget,
4618                                                   text_view->layout);
4619               /* vc may now be invalid! */
4620             }
4621
4622           tmp_list = g_slist_next (tmp_list);
4623         }
4624     }
4625 }
4626
4627 /**
4628  * gtk_text_view_get_default_attributes:
4629  * @text_view: a #GtkTextView
4630  *
4631  * Obtains a copy of the default text attributes. These are the
4632  * attributes used for text unless a tag overrides them.
4633  * You'd typically pass the default attributes in to
4634  * gtk_text_tag_get_attributes() in order to get the
4635  * attributes in effect at a given text position.
4636  *
4637  * The return value is a copy owned by the caller of this function,
4638  * and should be freed.
4639  *
4640  * Return value: a new #GtkTextAttributes
4641  **/
4642 GtkTextAttributes*
4643 gtk_text_view_get_default_attributes (GtkTextView *text_view)
4644 {
4645   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
4646
4647   gtk_text_view_ensure_layout (text_view);
4648
4649   return gtk_text_attributes_copy (text_view->layout->default_style);
4650 }
4651
4652 static void
4653 gtk_text_view_destroy_layout (GtkTextView *text_view)
4654 {
4655   if (text_view->layout)
4656     {
4657       GSList *tmp_list;
4658
4659       if (text_view->incremental_validate_idle)
4660         {
4661           g_source_remove (text_view->incremental_validate_idle);
4662           text_view->incremental_validate_idle = 0;
4663         }
4664
4665       /* Remove layout from all anchored children */
4666
4667       tmp_list = text_view->children;
4668       while (tmp_list != NULL)
4669         {
4670           GtkTextViewChild *vc = tmp_list->data;
4671
4672           if (vc->anchor)
4673             {
4674               gtk_text_anchored_child_set_layout (vc->widget, NULL);
4675               /* vc may now be invalid! */
4676             }
4677
4678           tmp_list = g_slist_next (tmp_list);
4679         }
4680
4681       gtk_text_view_stop_cursor_blink (text_view);
4682       gtk_text_view_end_selection_drag (text_view, NULL);
4683
4684       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->layout),
4685                                             invalidated_handler, text_view);
4686       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->layout),
4687                                             changed_handler, text_view);
4688       g_object_unref (G_OBJECT (text_view->layout));
4689       text_view->layout = NULL;
4690     }
4691 }
4692
4693 static void
4694 gtk_text_view_reset_im_context (GtkTextView *text_view)
4695 {
4696   if (text_view->need_im_reset)
4697     {
4698       text_view->need_im_reset = FALSE;
4699       gtk_im_context_reset (text_view->im_context);
4700       gtk_text_view_update_im_spot_location (text_view);
4701     }
4702 }
4703
4704 /*
4705  * DND feature
4706  */
4707
4708 static void
4709 gtk_text_view_start_selection_dnd (GtkTextView       *text_view,
4710                                    const GtkTextIter *iter,
4711                                    GdkEventMotion    *event)
4712 {
4713   GdkDragContext *context;
4714   GtkTargetList *target_list;
4715
4716   text_view->drag_start_x = -1;
4717   text_view->drag_start_y = -1;
4718   text_view->pending_place_cursor_button = 0;
4719
4720   target_list = gtk_target_list_new (target_table,
4721                                      G_N_ELEMENTS (target_table));
4722
4723   context = gtk_drag_begin (GTK_WIDGET (text_view), target_list,
4724                             GDK_ACTION_COPY | GDK_ACTION_MOVE,
4725                             1, (GdkEvent*)event);
4726
4727   gtk_target_list_unref (target_list);
4728
4729   gtk_drag_set_icon_default (context);
4730 }
4731
4732 static void
4733 gtk_text_view_drag_begin (GtkWidget        *widget,
4734                           GdkDragContext   *context)
4735 {
4736   /* do nothing */
4737 }
4738
4739 static void
4740 gtk_text_view_drag_end (GtkWidget        *widget,
4741                         GdkDragContext   *context)
4742 {
4743   GtkTextView *text_view;
4744
4745   text_view = GTK_TEXT_VIEW (widget);
4746 }
4747
4748 static void
4749 gtk_text_view_drag_data_get (GtkWidget        *widget,
4750                              GdkDragContext   *context,
4751                              GtkSelectionData *selection_data,
4752                              guint             info,
4753                              guint             time)
4754 {
4755   GtkTextView *text_view;
4756
4757   text_view = GTK_TEXT_VIEW (widget);
4758
4759   if (selection_data->target == gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE))
4760     {
4761       GtkTextBuffer *buffer = gtk_text_view_get_buffer (text_view);
4762
4763       gtk_selection_data_set (selection_data,
4764                               gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE),
4765                               8, /* bytes */
4766                               (void*)&buffer,
4767                               sizeof (buffer));
4768     }
4769   else
4770     {
4771       gchar *str;
4772       GtkTextIter start;
4773       GtkTextIter end;
4774
4775       str = NULL;
4776
4777       if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
4778                                                 &start, &end))
4779         {
4780           /* Extract the selected text */
4781           str = gtk_text_iter_get_visible_text (&start, &end);
4782         }
4783
4784       if (str)
4785         {
4786           gtk_selection_data_set_text (selection_data, str);
4787           g_free (str);
4788         }
4789     }
4790 }
4791
4792 static void
4793 gtk_text_view_drag_data_delete (GtkWidget        *widget,
4794                                 GdkDragContext   *context)
4795 {
4796   GtkTextView *text_view;
4797
4798   text_view = GTK_TEXT_VIEW (widget);
4799
4800   gtk_text_buffer_delete_selection (GTK_TEXT_VIEW (widget)->buffer,
4801                                     TRUE, GTK_TEXT_VIEW (widget)->editable);
4802 }
4803
4804 static void
4805 gtk_text_view_drag_leave (GtkWidget        *widget,
4806                           GdkDragContext   *context,
4807                           guint             time)
4808 {
4809   GtkTextView *text_view;
4810
4811   text_view = GTK_TEXT_VIEW (widget);
4812
4813   gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
4814
4815   if (text_view->scroll_timeout != 0)
4816     gtk_timeout_remove (text_view->scroll_timeout);
4817
4818   text_view->scroll_timeout = 0;
4819 }
4820
4821 static gboolean
4822 gtk_text_view_drag_motion (GtkWidget        *widget,
4823                            GdkDragContext   *context,
4824                            gint              x,
4825                            gint              y,
4826                            guint             time)
4827 {
4828   GtkTextIter newplace;
4829   GtkTextView *text_view;
4830   GtkTextIter start;
4831   GtkTextIter end;
4832   GdkRectangle target_rect;
4833   gint bx, by;
4834   GdkDragAction suggested_action = 0;
4835
4836   text_view = GTK_TEXT_VIEW (widget);
4837
4838   target_rect = text_view->text_window->allocation;
4839
4840   if (x < target_rect.x ||
4841       y < target_rect.y ||
4842       x > (target_rect.x + target_rect.width) ||
4843       y > (target_rect.y + target_rect.height))
4844     return FALSE; /* outside the text window, allow parent widgets to handle event */
4845
4846   gtk_text_view_window_to_buffer_coords (text_view,
4847                                          GTK_TEXT_WINDOW_WIDGET,
4848                                          x, y,
4849                                          &bx, &by);
4850
4851   gtk_text_layout_get_iter_at_pixel (text_view->layout,
4852                                      &newplace,
4853                                      bx, by);
4854
4855   if (gtk_drag_dest_find_target (widget, context,
4856                                  gtk_drag_dest_get_target_list (widget)) == GDK_NONE)
4857     {
4858       /* can't accept any of the offered targets */
4859     }
4860   else if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
4861                                             &start, &end) &&
4862            gtk_text_iter_in_range (&newplace, &start, &end))
4863     {
4864       /* We're inside the selection. */
4865     }
4866   else
4867     {
4868       if (gtk_text_iter_can_insert (&newplace, text_view->editable))
4869         {
4870           GtkWidget *source_widget;
4871
4872           suggested_action = context->suggested_action;
4873
4874           source_widget = gtk_drag_get_source_widget (context);
4875
4876           if (source_widget == widget)
4877             {
4878               /* Default to MOVE, unless the user has
4879                * pressed ctrl or alt to affect available actions
4880                */
4881               if ((context->actions & GDK_ACTION_MOVE) != 0)
4882                 suggested_action = GDK_ACTION_MOVE;
4883             }
4884         }
4885       else
4886         {
4887           /* Can't drop here. */
4888         }
4889     }
4890
4891   if (suggested_action != 0)
4892     {
4893       gtk_text_mark_set_visible (text_view->dnd_mark,
4894                                  text_view->cursor_visible);
4895
4896       gdk_drag_status (context, suggested_action, time);
4897     }
4898   else
4899     {
4900       gdk_drag_status (context, 0, time);
4901       gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
4902     }
4903
4904   gtk_text_buffer_move_mark (get_buffer (text_view),
4905                              text_view->dnd_mark,
4906                              &newplace);
4907
4908   DV(g_print (G_STRLOC": scrolling to mark\n"));
4909   gtk_text_view_scroll_to_mark (text_view,
4910                                 text_view->dnd_mark,
4911                                 DND_SCROLL_MARGIN, FALSE, 0.0, 0.0);
4912
4913   if (text_view->scroll_timeout != 0) /* reset on every motion event */
4914     gtk_timeout_remove (text_view->scroll_timeout);
4915
4916   text_view->scroll_timeout =
4917     gtk_timeout_add (50, drag_scan_timeout, text_view);
4918
4919   /* TRUE return means don't propagate the drag motion to parent
4920    * widgets that may also be drop sites.
4921    */
4922   return TRUE;
4923 }
4924
4925 static gboolean
4926 gtk_text_view_drag_drop (GtkWidget        *widget,
4927                          GdkDragContext   *context,
4928                          gint              x,
4929                          gint              y,
4930                          guint             time)
4931 {
4932   GtkTextView *text_view;
4933   GtkTextIter drop_point;
4934   GdkAtom target = GDK_NONE;
4935
4936   text_view = GTK_TEXT_VIEW (widget);
4937
4938   if (text_view->scroll_timeout != 0)
4939     gtk_timeout_remove (text_view->scroll_timeout);
4940
4941   text_view->scroll_timeout = 0;
4942
4943   gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
4944
4945   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4946                                     &drop_point,
4947                                     text_view->dnd_mark);
4948
4949   if (gtk_text_iter_can_insert (&drop_point, text_view->editable))
4950     target = gtk_drag_dest_find_target (widget, context, NULL);
4951
4952   if (target != GDK_NONE)
4953     gtk_drag_get_data (widget, context, target, time);
4954   else
4955     gtk_drag_finish (context, FALSE, FALSE, time);
4956
4957   return TRUE;
4958 }
4959
4960 static void
4961 insert_text_data (GtkTextView      *text_view,
4962                   GtkTextIter      *drop_point,
4963                   GtkSelectionData *selection_data)
4964 {
4965   gchar *str;
4966
4967   str = gtk_selection_data_get_text (selection_data);
4968
4969   if (str)
4970     {
4971       gtk_text_buffer_insert_interactive (get_buffer (text_view),
4972                                           drop_point, str, -1,
4973                                           text_view->editable);
4974       g_free (str);
4975     }
4976 }
4977
4978 static void
4979 gtk_text_view_drag_data_received (GtkWidget        *widget,
4980                                   GdkDragContext   *context,
4981                                   gint              x,
4982                                   gint              y,
4983                                   GtkSelectionData *selection_data,
4984                                   guint             info,
4985                                   guint             time)
4986 {
4987   GtkTextIter drop_point;
4988   GtkTextView *text_view;
4989   gboolean success = FALSE;
4990
4991   text_view = GTK_TEXT_VIEW (widget);
4992
4993   if (!text_view->dnd_mark)
4994     goto done;
4995
4996   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4997                                     &drop_point,
4998                                     text_view->dnd_mark);
4999
5000   if (!gtk_text_iter_can_insert (&drop_point, text_view->editable))
5001     goto done;
5002
5003   if (selection_data->target == gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE))
5004     {
5005       GtkTextBuffer *src_buffer = NULL;
5006       GtkTextIter start, end;
5007       gboolean copy_tags = TRUE;
5008
5009       if (selection_data->length != sizeof (src_buffer))
5010         return;
5011
5012       memcpy (&src_buffer, selection_data->data, sizeof (src_buffer));
5013
5014       if (src_buffer == NULL)
5015         return;
5016
5017       g_return_if_fail (GTK_IS_TEXT_BUFFER (src_buffer));
5018
5019       if (gtk_text_buffer_get_tag_table (src_buffer) !=
5020           gtk_text_buffer_get_tag_table (get_buffer (text_view)))
5021         copy_tags = FALSE;
5022
5023       if (gtk_text_buffer_get_selection_bounds (src_buffer,
5024                                                 &start,
5025                                                 &end))
5026         {
5027           if (copy_tags)
5028             gtk_text_buffer_insert_range_interactive (get_buffer (text_view),
5029                                                       &drop_point,
5030                                                       &start,
5031                                                       &end,
5032                                                       text_view->editable);
5033           else
5034             {
5035               gchar *str;
5036
5037               str = gtk_text_iter_get_visible_text (&start, &end);
5038               gtk_text_buffer_insert_interactive (get_buffer (text_view),
5039                                                   &drop_point, str, -1,
5040                                                   text_view->editable);
5041               g_free (str);
5042             }
5043         }
5044     }
5045   else
5046     insert_text_data (text_view, &drop_point, selection_data);
5047
5048   success = TRUE;
5049
5050  done:
5051   gtk_drag_finish (context, success,
5052                    success && context->action == GDK_ACTION_MOVE,
5053                    time);
5054 }
5055
5056 static GtkAdjustment*
5057 get_hadjustment (GtkTextView *text_view)
5058 {
5059   if (text_view->hadjustment == NULL)
5060     gtk_text_view_set_scroll_adjustments (text_view,
5061                                           NULL, /* forces creation */
5062                                           text_view->vadjustment);
5063
5064   return text_view->hadjustment;
5065 }
5066
5067 static GtkAdjustment*
5068 get_vadjustment (GtkTextView *text_view)
5069 {
5070   if (text_view->vadjustment == NULL)
5071     gtk_text_view_set_scroll_adjustments (text_view,
5072                                           text_view->hadjustment,
5073                                           NULL); /* forces creation */
5074   return text_view->vadjustment;
5075 }
5076
5077
5078 static void
5079 gtk_text_view_set_scroll_adjustments (GtkTextView   *text_view,
5080                                       GtkAdjustment *hadj,
5081                                       GtkAdjustment *vadj)
5082 {
5083   gboolean need_adjust = FALSE;
5084
5085   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
5086
5087   if (hadj)
5088     g_return_if_fail (GTK_IS_ADJUSTMENT (hadj));
5089   else
5090     hadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
5091   if (vadj)
5092     g_return_if_fail (GTK_IS_ADJUSTMENT (vadj));
5093   else
5094     vadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
5095
5096   if (text_view->hadjustment && (text_view->hadjustment != hadj))
5097     {
5098       gtk_signal_disconnect_by_data (GTK_OBJECT (text_view->hadjustment), text_view);
5099       g_object_unref (G_OBJECT (text_view->hadjustment));
5100     }
5101
5102   if (text_view->vadjustment && (text_view->vadjustment != vadj))
5103     {
5104       gtk_signal_disconnect_by_data (GTK_OBJECT (text_view->vadjustment), text_view);
5105       g_object_unref (G_OBJECT (text_view->vadjustment));
5106     }
5107
5108   if (text_view->hadjustment != hadj)
5109     {
5110       text_view->hadjustment = hadj;
5111       g_object_ref (G_OBJECT (text_view->hadjustment));
5112       gtk_object_sink (GTK_OBJECT (text_view->hadjustment));
5113
5114       gtk_signal_connect (GTK_OBJECT (text_view->hadjustment), "value_changed",
5115                           (GtkSignalFunc) gtk_text_view_value_changed,
5116                           text_view);
5117       need_adjust = TRUE;
5118     }
5119
5120   if (text_view->vadjustment != vadj)
5121     {
5122       text_view->vadjustment = vadj;
5123       g_object_ref (G_OBJECT (text_view->vadjustment));
5124       gtk_object_sink (GTK_OBJECT (text_view->vadjustment));
5125
5126       gtk_signal_connect (GTK_OBJECT (text_view->vadjustment), "value_changed",
5127                           (GtkSignalFunc) gtk_text_view_value_changed,
5128                           text_view);
5129       need_adjust = TRUE;
5130     }
5131
5132   if (need_adjust)
5133     gtk_text_view_value_changed (NULL, text_view);
5134 }
5135
5136 static void
5137 gtk_text_view_value_changed (GtkAdjustment *adj,
5138                              GtkTextView   *text_view)
5139 {
5140   GtkTextIter iter;
5141   gint line_top;
5142   gint dx = 0;
5143   gint dy = 0;
5144
5145   /* Note that we oddly call this function with adj == NULL
5146    * sometimes
5147    */
5148
5149   text_view->onscreen_validated = FALSE;
5150
5151   DV(g_print(">Scroll offset changed %s/%g, onscreen_validated = FALSE ("G_STRLOC")\n",
5152              adj == text_view->hadjustment ? "hadj" : adj == text_view->vadjustment ? "vadj" : "none",
5153              adj ? adj->value : 0.0));
5154
5155   if (adj == text_view->hadjustment)
5156     {
5157       dx = text_view->xoffset - (gint)adj->value;
5158       text_view->xoffset = adj->value;
5159     }
5160   else if (adj == text_view->vadjustment)
5161     {
5162       dy = text_view->yoffset - (gint)adj->value;
5163       text_view->yoffset = adj->value;
5164
5165       if (text_view->layout)
5166         {
5167           gtk_text_layout_get_line_at_y (text_view->layout, &iter, adj->value, &line_top);
5168
5169           gtk_text_buffer_move_mark (get_buffer (text_view), text_view->first_para_mark, &iter);
5170
5171           text_view->first_para_pixels = adj->value - line_top;
5172         }
5173     }
5174
5175   if (GTK_WIDGET_REALIZED (text_view) && (dx != 0 || dy != 0))
5176     {
5177       if (dy != 0)
5178         {
5179           if (text_view->left_window)
5180             text_window_scroll (text_view->left_window, 0, dy);
5181           if (text_view->right_window)
5182             text_window_scroll (text_view->right_window, 0, dy);
5183         }
5184
5185       if (dx != 0)
5186         {
5187           if (text_view->top_window)
5188             text_window_scroll (text_view->top_window, dx, 0);
5189           if (text_view->bottom_window)
5190             text_window_scroll (text_view->bottom_window, dx, 0);
5191         }
5192
5193       /* It looks nicer to scroll the main area last, because
5194        * it takes a while, and making the side areas update
5195        * afterward emphasizes the slowness of scrolling the
5196        * main area.
5197        */
5198       text_window_scroll (text_view->text_window, dx, dy);
5199     }
5200
5201   /* This could result in invalidation, which would install the
5202    * first_validate_idle, which would validate onscreen;
5203    * but we're going to go ahead and validate here, so
5204    * first_validate_idle shouldn't have anything to do.
5205    */
5206   gtk_text_view_update_layout_width (text_view);
5207
5208   /* note that validation of onscreen could invoke this function
5209    * recursively, by scrolling to maintain first_para, or in response
5210    * to updating the layout width, however there is no problem with
5211    * that, or shouldn't be.
5212    */
5213   gtk_text_view_validate_onscreen (text_view);
5214
5215   /* process exposes */
5216   if (GTK_WIDGET_REALIZED (text_view))
5217     {
5218       if (text_view->left_window)
5219         gdk_window_process_updates (text_view->left_window->bin_window, TRUE);
5220
5221       if (text_view->right_window)
5222         gdk_window_process_updates (text_view->right_window->bin_window, TRUE);
5223
5224       if (text_view->top_window)
5225         gdk_window_process_updates (text_view->top_window->bin_window, TRUE);
5226
5227       if (text_view->bottom_window)
5228         gdk_window_process_updates (text_view->bottom_window->bin_window, TRUE);
5229
5230       gdk_window_process_updates (text_view->text_window->bin_window, TRUE);
5231     }
5232
5233   /* If this got installed, get rid of it, it's just a waste of time. */
5234   if (text_view->first_validate_idle != 0)
5235     {
5236       g_source_remove (text_view->first_validate_idle);
5237       text_view->first_validate_idle = 0;
5238     }
5239
5240   gtk_text_view_update_im_spot_location (text_view);
5241
5242   DV(g_print(">End scroll offset changed handler ("G_STRLOC")\n"));
5243 }
5244
5245 static void
5246 gtk_text_view_commit_handler (GtkIMContext  *context,
5247                               const gchar   *str,
5248                               GtkTextView   *text_view)
5249 {
5250   gboolean had_selection;
5251
5252   gtk_text_buffer_begin_user_action (get_buffer (text_view));
5253
5254   had_selection = gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
5255                                                         NULL, NULL);
5256
5257   gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
5258                                     text_view->editable);
5259
5260   if (!strcmp (str, "\n"))
5261     {
5262       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\n", 1,
5263                                                     text_view->editable);
5264     }
5265   else
5266     {
5267       if (!had_selection && text_view->overwrite_mode)
5268         gtk_text_view_delete_from_cursor (text_view, GTK_DELETE_CHARS, 1);
5269       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
5270                                                     text_view->editable);
5271     }
5272
5273   gtk_text_buffer_end_user_action (get_buffer (text_view));
5274
5275   DV(g_print (G_STRLOC": scrolling onscreen\n"));
5276   gtk_text_view_scroll_mark_onscreen (text_view,
5277                                       gtk_text_buffer_get_mark (get_buffer (text_view),
5278                                                                 "insert"));
5279 }
5280
5281 static void
5282 gtk_text_view_preedit_changed_handler (GtkIMContext *context,
5283                                        GtkTextView  *text_view)
5284 {
5285   gchar *str;
5286   PangoAttrList *attrs;
5287   gint cursor_pos;
5288
5289   gtk_im_context_get_preedit_string (context, &str, &attrs, &cursor_pos);
5290   gtk_text_layout_set_preedit_string (text_view->layout, str, attrs, cursor_pos);
5291
5292   pango_attr_list_unref (attrs);
5293   g_free (str);
5294 }
5295
5296 static void
5297 gtk_text_view_mark_set_handler (GtkTextBuffer     *buffer,
5298                                 const GtkTextIter *location,
5299                                 GtkTextMark       *mark,
5300                                 gpointer           data)
5301 {
5302   GtkTextView *text_view = GTK_TEXT_VIEW (data);
5303   gboolean need_reset = FALSE;
5304
5305   if (mark == gtk_text_buffer_get_insert (buffer))
5306     {
5307       text_view->virtual_cursor_x = -1;
5308       text_view->virtual_cursor_y = -1;
5309       need_reset = TRUE;
5310     }
5311   else if (mark == gtk_text_buffer_get_selection_bound (buffer))
5312     {
5313       need_reset = TRUE;
5314     }
5315
5316   if (need_reset)
5317     gtk_text_view_reset_im_context (text_view);
5318 }
5319
5320 static void
5321 gtk_text_view_get_virtual_cursor_pos (GtkTextView *text_view,
5322                                       gint        *x,
5323                                       gint        *y)
5324 {
5325   GdkRectangle strong_pos;
5326   GtkTextIter insert;
5327
5328   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
5329                                     gtk_text_buffer_get_mark (get_buffer (text_view),
5330                                                               "insert"));
5331
5332   if ((x && text_view->virtual_cursor_x == -1) ||
5333       (y && text_view->virtual_cursor_y == -1))
5334     gtk_text_layout_get_cursor_locations (text_view->layout, &insert, &strong_pos, NULL);
5335
5336   if (x)
5337     {
5338       if (text_view->virtual_cursor_x != -1)
5339         *x = text_view->virtual_cursor_x;
5340       else
5341         *x = strong_pos.x;
5342     }
5343
5344   if (y)
5345     {
5346       if (text_view->virtual_cursor_x != -1)
5347         *y = text_view->virtual_cursor_y;
5348       else
5349         *y = strong_pos.y + strong_pos.height / 2;
5350     }
5351 }
5352
5353 static void
5354 gtk_text_view_set_virtual_cursor_pos (GtkTextView *text_view,
5355                                       gint         x,
5356                                       gint         y)
5357 {
5358   GdkRectangle strong_pos;
5359   GtkTextIter insert;
5360
5361   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
5362                                     gtk_text_buffer_get_mark (get_buffer (text_view),
5363                                                               "insert"));
5364
5365   if (x == -1 || y == -1)
5366     gtk_text_layout_get_cursor_locations (text_view->layout, &insert, &strong_pos, NULL);
5367
5368   text_view->virtual_cursor_x = (x == -1) ? strong_pos.x : x;
5369   text_view->virtual_cursor_y = (y == -1) ? strong_pos.y + strong_pos.height / 2 : y;
5370 }
5371
5372 /* Quick hack of a popup menu
5373  */
5374 static void
5375 activate_cb (GtkWidget   *menuitem,
5376              GtkTextView *text_view)
5377 {
5378   const gchar *signal = g_object_get_data (G_OBJECT (menuitem), "gtk-signal");
5379   gtk_signal_emit_by_name (GTK_OBJECT (text_view), signal);
5380 }
5381
5382 static void
5383 append_action_signal (GtkTextView  *text_view,
5384                       GtkWidget    *menu,
5385                       const gchar  *stock_id,
5386                       const gchar  *signal,
5387                       gboolean      sensitive)
5388 {
5389   GtkWidget *menuitem = gtk_image_menu_item_new_from_stock (stock_id, NULL);
5390
5391   g_object_set_data (G_OBJECT (menuitem), "gtk-signal", (char *)signal);
5392   gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
5393                       GTK_SIGNAL_FUNC (activate_cb), text_view);
5394
5395   gtk_widget_set_sensitive (menuitem, sensitive);
5396
5397   gtk_widget_show (menuitem);
5398   gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
5399 }
5400
5401 static void
5402 popup_menu_detach (GtkWidget *attach_widget,
5403                    GtkMenu   *menu)
5404 {
5405   GTK_TEXT_VIEW (attach_widget)->popup_menu = NULL;
5406 }
5407
5408 static void
5409 popup_position_func (GtkMenu   *menu,
5410                      gint      *x,
5411                      gint      *y,
5412                      gboolean  *push_in,
5413                      gpointer   user_data)
5414 {
5415   GtkTextView *text_view;
5416   GtkWidget *widget;
5417   GdkRectangle cursor_rect;
5418   GdkRectangle onscreen_rect;
5419   gint root_x, root_y;
5420   GtkTextIter iter;
5421   GtkRequisition req;
5422
5423   text_view = GTK_TEXT_VIEW (user_data);
5424   widget = GTK_WIDGET (text_view);
5425
5426   g_return_if_fail (GTK_WIDGET_REALIZED (text_view));
5427
5428   gdk_window_get_origin (widget->window, &root_x, &root_y);
5429
5430   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
5431                                     &iter,
5432                                     gtk_text_buffer_get_insert (get_buffer (text_view)));
5433
5434   gtk_text_view_get_iter_location (text_view,
5435                                    &iter,
5436                                    &cursor_rect);
5437
5438   gtk_text_view_get_visible_rect (text_view, &onscreen_rect);
5439
5440   gtk_widget_size_request (text_view->popup_menu, &req);
5441
5442   /* can't use rectangle_intersect since cursor rect can have 0 width */
5443   if (cursor_rect.x >= onscreen_rect.x &&
5444       cursor_rect.x < onscreen_rect.x + onscreen_rect.width &&
5445       cursor_rect.y >= onscreen_rect.y &&
5446       cursor_rect.y < onscreen_rect.y + onscreen_rect.height)
5447     {
5448       gtk_text_view_buffer_to_window_coords (text_view,
5449                                              GTK_TEXT_WINDOW_WIDGET,
5450                                              cursor_rect.x, cursor_rect.y,
5451                                              &cursor_rect.x, &cursor_rect.y);
5452
5453       *x = root_x + cursor_rect.x + cursor_rect.width;
5454       *y = root_y + cursor_rect.y + cursor_rect.height;
5455     }
5456   else
5457     {
5458       /* Just center the menu, since cursor is offscreen. */
5459       *x = root_x + (widget->allocation.width / 2 - req.width / 2);
5460       *y = root_y + (widget->allocation.height / 2 - req.height / 2);
5461     }
5462
5463   /* Ensure sanity */
5464   *x = CLAMP (*x, root_x, (root_x + widget->allocation.width));
5465   *y = CLAMP (*y, root_y, (root_y + widget->allocation.height));
5466
5467   *x = CLAMP (*x, 0, MAX (0, gdk_screen_width () - req.width));
5468   *y = CLAMP (*y, 0, MAX (0, gdk_screen_height () - req.height));
5469 }
5470
5471 typedef struct
5472 {
5473   GtkTextView *text_view;
5474   gint button;
5475   guint time;
5476 } PopupInfo;
5477
5478 static gboolean
5479 range_contains_editable_text (const GtkTextIter *start,
5480                               const GtkTextIter *end,
5481                               gboolean default_editability)
5482 {
5483   GtkTextIter iter = *start;
5484
5485   while (gtk_text_iter_compare (&iter, end) < 0)
5486     {
5487       if (gtk_text_iter_editable (&iter, default_editability))
5488         return TRUE;
5489
5490       gtk_text_iter_forward_to_tag_toggle (&iter, NULL);
5491     }
5492
5493   return FALSE;
5494 }
5495
5496 static void
5497 popup_targets_received (GtkClipboard     *clipboard,
5498                         GtkSelectionData *data,
5499                         gpointer          user_data)
5500 {
5501   PopupInfo *info = user_data;
5502   GtkTextView *text_view = info->text_view;
5503
5504   if (GTK_WIDGET_REALIZED (text_view))
5505     {
5506       /* We implicitely rely here on the fact that if we are pasting ourself, we'll
5507        * have text targets as well as the private GTK_TEXT_BUFFER_CONTENTS target.
5508        */
5509       gboolean clipboard_contains_text = gtk_selection_data_targets_include_text (data);
5510       GtkWidget *menuitem;
5511       GtkWidget *submenu;
5512       gboolean have_selection;
5513       gboolean can_insert;
5514       GtkTextIter iter;
5515       GtkTextIter sel_start, sel_end;
5516
5517       if (text_view->popup_menu)
5518         gtk_widget_destroy (text_view->popup_menu);
5519
5520       text_view->popup_menu = gtk_menu_new ();
5521
5522       gtk_menu_attach_to_widget (GTK_MENU (text_view->popup_menu),
5523                                  GTK_WIDGET (text_view),
5524                                  popup_menu_detach);
5525
5526       have_selection = gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
5527                                                              &sel_start, &sel_end);
5528
5529       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
5530                                         &iter,
5531                                         gtk_text_buffer_get_insert (get_buffer (text_view)));
5532
5533       can_insert = gtk_text_iter_can_insert (&iter, text_view->editable);
5534
5535       append_action_signal (text_view, text_view->popup_menu, GTK_STOCK_CUT, "cut_clipboard",
5536                             have_selection &&
5537                             range_contains_editable_text (&sel_start, &sel_end,
5538                                                           text_view->editable));
5539       append_action_signal (text_view, text_view->popup_menu, GTK_STOCK_COPY, "copy_clipboard",
5540                             have_selection);
5541       append_action_signal (text_view, text_view->popup_menu, GTK_STOCK_PASTE, "paste_clipboard",
5542                             can_insert && clipboard_contains_text);
5543
5544       menuitem = gtk_separator_menu_item_new ();
5545       gtk_widget_show (menuitem);
5546       gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
5547
5548       menuitem = gtk_menu_item_new_with_label (_("Input Methods"));
5549       gtk_widget_show (menuitem);
5550       submenu = gtk_menu_new ();
5551       gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), submenu);
5552       gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
5553
5554       gtk_im_multicontext_append_menuitems (GTK_IM_MULTICONTEXT (text_view->im_context),
5555                                             GTK_MENU_SHELL (submenu));
5556
5557       gtk_signal_emit (GTK_OBJECT (text_view),
5558                        signals[POPULATE_POPUP],
5559                        text_view->popup_menu);
5560
5561       if (info->button)
5562         gtk_menu_popup (GTK_MENU (text_view->popup_menu), NULL, NULL,
5563                         NULL, NULL,
5564                         info->button, info->time);
5565       else
5566         gtk_menu_popup (GTK_MENU (text_view->popup_menu), NULL, NULL,
5567                         popup_position_func, text_view,
5568                         0, gtk_get_current_event_time ());
5569     }
5570
5571   g_object_unref (text_view);
5572   g_free (info);
5573 }
5574
5575 static void
5576 gtk_text_view_do_popup (GtkTextView    *text_view,
5577                         GdkEventButton *event)
5578 {
5579   PopupInfo *info = g_new (PopupInfo, 1);
5580
5581   /* In order to know what entries we should make sensitive, we
5582    * ask for the current targets of the clipboard, and when
5583    * we get them, then we actually pop up the menu.
5584    */
5585   info->text_view = g_object_ref (text_view);
5586
5587   if (event)
5588     {
5589       info->button = event->button;
5590       info->time = event->time;
5591     }
5592   else
5593     {
5594       info->button = 0;
5595       info->time = gtk_get_current_event_time ();
5596     }
5597
5598   gtk_clipboard_request_contents (gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
5599                                   gdk_atom_intern ("TARGETS", FALSE),
5600                                   popup_targets_received,
5601                                   info);
5602 }
5603
5604 static void
5605 gtk_text_view_popup_menu (GtkWidget *widget)
5606 {
5607   gtk_text_view_do_popup (GTK_TEXT_VIEW (widget), NULL);
5608 }
5609
5610 /* Child GdkWindows */
5611
5612
5613 static GtkTextWindow*
5614 text_window_new (GtkTextWindowType  type,
5615                  GtkWidget         *widget,
5616                  gint               width_request,
5617                  gint               height_request)
5618 {
5619   GtkTextWindow *win;
5620
5621   win = g_new (GtkTextWindow, 1);
5622
5623   win->type = type;
5624   win->widget = widget;
5625   win->window = NULL;
5626   win->bin_window = NULL;
5627   win->requisition.width = width_request;
5628   win->requisition.height = height_request;
5629   win->allocation.width = width_request;
5630   win->allocation.height = height_request;
5631   win->allocation.x = 0;
5632   win->allocation.y = 0;
5633
5634   return win;
5635 }
5636
5637 static void
5638 text_window_free (GtkTextWindow *win)
5639 {
5640   if (win->window)
5641     text_window_unrealize (win);
5642
5643   g_free (win);
5644 }
5645
5646 static void
5647 text_window_realize (GtkTextWindow *win,
5648                      GdkWindow     *parent)
5649 {
5650   GdkWindowAttr attributes;
5651   gint attributes_mask;
5652   GdkCursor *cursor;
5653
5654   attributes.window_type = GDK_WINDOW_CHILD;
5655   attributes.x = win->allocation.x;
5656   attributes.y = win->allocation.y;
5657   attributes.width = win->allocation.width;
5658   attributes.height = win->allocation.height;
5659   attributes.wclass = GDK_INPUT_OUTPUT;
5660   attributes.visual = gtk_widget_get_visual (win->widget);
5661   attributes.colormap = gtk_widget_get_colormap (win->widget);
5662   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK;
5663
5664   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
5665
5666   win->window = gdk_window_new (parent,
5667                                 &attributes,
5668                                 attributes_mask);
5669
5670   gdk_window_show (win->window);
5671   gdk_window_set_user_data (win->window, win->widget);
5672
5673   attributes.x = 0;
5674   attributes.y = 0;
5675   attributes.width = win->allocation.width;
5676   attributes.height = win->allocation.height;
5677   attributes.event_mask = (GDK_EXPOSURE_MASK            |
5678                            GDK_SCROLL_MASK              |
5679                            GDK_KEY_PRESS_MASK           |
5680                            GDK_BUTTON_PRESS_MASK        |
5681                            GDK_BUTTON_RELEASE_MASK      |
5682                            GDK_POINTER_MOTION_MASK      |
5683                            GDK_POINTER_MOTION_HINT_MASK |
5684                            gtk_widget_get_events (win->widget));
5685
5686   win->bin_window = gdk_window_new (win->window,
5687                                     &attributes,
5688                                     attributes_mask);
5689
5690   gdk_window_show (win->bin_window);
5691   gdk_window_set_user_data (win->bin_window, win->widget);
5692
5693   if (win->type == GTK_TEXT_WINDOW_TEXT)
5694     {
5695       /* I-beam cursor */
5696       cursor = gdk_cursor_new (GDK_XTERM);
5697       gdk_window_set_cursor (win->bin_window, cursor);
5698       gdk_cursor_destroy (cursor);
5699
5700       gtk_im_context_set_client_window (GTK_TEXT_VIEW (win->widget)->im_context,
5701                                         win->window);
5702
5703
5704       gdk_window_set_background (win->bin_window,
5705                                  &win->widget->style->base[GTK_WIDGET_STATE (win->widget)]);
5706     }
5707   else
5708     {
5709       gdk_window_set_background (win->bin_window,
5710                                  &win->widget->style->bg[GTK_WIDGET_STATE (win->widget)]);
5711     }
5712
5713   g_object_set_qdata (G_OBJECT (win->window),
5714                       g_quark_from_static_string ("gtk-text-view-text-window"),
5715                       win);
5716
5717   g_object_set_qdata (G_OBJECT (win->bin_window),
5718                       g_quark_from_static_string ("gtk-text-view-text-window"),
5719                       win);
5720 }
5721
5722 static void
5723 text_window_unrealize (GtkTextWindow *win)
5724 {
5725   if (win->type == GTK_TEXT_WINDOW_TEXT)
5726     {
5727       gtk_im_context_set_client_window (GTK_TEXT_VIEW (win->widget)->im_context,
5728                                         NULL);
5729     }
5730
5731   gdk_window_set_user_data (win->window, NULL);
5732   gdk_window_set_user_data (win->bin_window, NULL);
5733   gdk_window_destroy (win->bin_window);
5734   gdk_window_destroy (win->window);
5735   win->window = NULL;
5736   win->bin_window = NULL;
5737 }
5738
5739 static void
5740 text_window_size_allocate (GtkTextWindow *win,
5741                            GdkRectangle  *rect)
5742 {
5743   win->allocation = *rect;
5744
5745   if (win->window)
5746     {
5747       gdk_window_move_resize (win->window,
5748                               rect->x, rect->y,
5749                               rect->width, rect->height);
5750
5751       gdk_window_resize (win->bin_window,
5752                          rect->width, rect->height);
5753     }
5754 }
5755
5756 static void
5757 text_window_scroll        (GtkTextWindow *win,
5758                            gint           dx,
5759                            gint           dy)
5760 {
5761   if (dx != 0 || dy != 0)
5762     {
5763       gdk_window_scroll (win->bin_window, dx, dy);
5764     }
5765 }
5766
5767 void
5768 text_window_invalidate_rect (GtkTextWindow *win,
5769                              GdkRectangle  *rect)
5770 {
5771   GdkRectangle window_rect;
5772
5773   gtk_text_view_buffer_to_window_coords (GTK_TEXT_VIEW (win->widget),
5774                                          win->type,
5775                                          rect->x,
5776                                          rect->y,
5777                                          &window_rect.x,
5778                                          &window_rect.y);
5779
5780   window_rect.width = rect->width;
5781   window_rect.height = rect->height;
5782
5783   /* Adjust the rect as appropriate */
5784
5785   switch (win->type)
5786     {
5787     case GTK_TEXT_WINDOW_TEXT:
5788       break;
5789
5790     case GTK_TEXT_WINDOW_LEFT:
5791     case GTK_TEXT_WINDOW_RIGHT:
5792       window_rect.x = 0;
5793       window_rect.width = win->allocation.width;
5794       break;
5795
5796     case GTK_TEXT_WINDOW_TOP:
5797     case GTK_TEXT_WINDOW_BOTTOM:
5798       window_rect.y = 0;
5799       window_rect.height = win->allocation.height;
5800       break;
5801
5802     default:
5803       g_warning ("%s: bug!", G_STRLOC);
5804       return;
5805       break;
5806     }
5807
5808   gdk_window_invalidate_rect (win->bin_window, &window_rect, FALSE);
5809
5810 #if 0
5811   {
5812     GdkColor color = { 0, 65535, 0, 0 };
5813     GdkGC *gc = gdk_gc_new (win->bin_window);
5814     gdk_gc_set_rgb_fg_color (gc, &color);
5815     gdk_draw_rectangle (win->bin_window,
5816                         gc, TRUE, window_rect.x, window_rect.y,
5817                         window_rect.width, window_rect.height);
5818     gdk_gc_unref (gc);
5819   }
5820 #endif
5821 }
5822
5823 static gint
5824 text_window_get_width (GtkTextWindow *win)
5825 {
5826   return win->allocation.width;
5827 }
5828
5829 static gint
5830 text_window_get_height (GtkTextWindow *win)
5831 {
5832   return win->allocation.height;
5833 }
5834
5835 static void
5836 text_window_get_allocation (GtkTextWindow *win,
5837                             GdkRectangle  *rect)
5838 {
5839   *rect = win->allocation;
5840 }
5841
5842 /* Windows */
5843
5844
5845 /**
5846  * gtk_text_view_get_window:
5847  * @text_view: a #GtkTextView
5848  * @win: window to get
5849  *
5850  * Retrieves the #GdkWindow corresponding to an area of the text view;
5851  * possible windows include the overall widget window, child windows
5852  * on the left, right, top, bottom, and the window that displays the
5853  * text buffer. Windows are %NULL and nonexistent if their width or
5854  * height is 0, and are nonexistent before the widget has been
5855  * realized.
5856  *
5857  * Return value: a #GdkWindow, or %NULL
5858  **/
5859 GdkWindow*
5860 gtk_text_view_get_window (GtkTextView *text_view,
5861                           GtkTextWindowType win)
5862 {
5863   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
5864
5865   switch (win)
5866     {
5867     case GTK_TEXT_WINDOW_WIDGET:
5868       return GTK_WIDGET (text_view)->window;
5869       break;
5870
5871     case GTK_TEXT_WINDOW_TEXT:
5872       return text_view->text_window->bin_window;
5873       break;
5874
5875     case GTK_TEXT_WINDOW_LEFT:
5876       if (text_view->left_window)
5877         return text_view->left_window->bin_window;
5878       else
5879         return NULL;
5880       break;
5881
5882     case GTK_TEXT_WINDOW_RIGHT:
5883       if (text_view->right_window)
5884         return text_view->right_window->bin_window;
5885       else
5886         return NULL;
5887       break;
5888
5889     case GTK_TEXT_WINDOW_TOP:
5890       if (text_view->top_window)
5891         return text_view->top_window->bin_window;
5892       else
5893         return NULL;
5894       break;
5895
5896     case GTK_TEXT_WINDOW_BOTTOM:
5897       if (text_view->bottom_window)
5898         return text_view->bottom_window->bin_window;
5899       else
5900         return NULL;
5901       break;
5902
5903     default:
5904       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
5905       return NULL;
5906       break;
5907     }
5908 }
5909
5910 /**
5911  * gtk_text_view_get_window_type:
5912  * @text_view: a #GtkTextView
5913  * @window: a window type
5914  *
5915  * Usually used to find out which window an event corresponds to.
5916  * If you connect to an event signal on @text_view, this function
5917  * should be called on <literal>event-&gt;window</literal> to
5918  * see which window it was.
5919  *
5920  * Return value: the window type.
5921  **/
5922 GtkTextWindowType
5923 gtk_text_view_get_window_type (GtkTextView *text_view,
5924                                GdkWindow   *window)
5925 {
5926   GtkTextWindow *win;
5927
5928   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
5929   g_return_val_if_fail (GDK_IS_WINDOW (window), 0);
5930
5931   if (window == GTK_WIDGET (text_view)->window)
5932     return GTK_TEXT_WINDOW_WIDGET;
5933
5934   win = g_object_get_qdata (G_OBJECT (window),
5935                             g_quark_try_string ("gtk-text-view-text-window"));
5936
5937   if (win)
5938     return win->type;
5939   else
5940     {
5941       return GTK_TEXT_WINDOW_PRIVATE;
5942     }
5943 }
5944
5945 static void
5946 buffer_to_widget (GtkTextView      *text_view,
5947                   gint              buffer_x,
5948                   gint              buffer_y,
5949                   gint             *window_x,
5950                   gint             *window_y)
5951 {
5952   gint focus_edge_width;
5953   gboolean interior_focus;
5954
5955   gtk_widget_style_get (GTK_WIDGET (text_view), "interior_focus", &interior_focus, NULL);
5956
5957   if (interior_focus)
5958     focus_edge_width = 0;
5959   else
5960     focus_edge_width = 1;
5961
5962   if (window_x)
5963     {
5964       *window_x = buffer_x - text_view->xoffset + focus_edge_width;
5965       if (text_view->left_window)
5966         *window_x += text_view->left_window->allocation.width;
5967     }
5968
5969   if (window_y)
5970     {
5971       *window_y = buffer_y - text_view->yoffset + focus_edge_width;
5972       if (text_view->top_window)
5973         *window_y += text_view->top_window->allocation.height;
5974     }
5975 }
5976
5977 static void
5978 widget_to_text_window (GtkTextWindow *win,
5979                        gint           widget_x,
5980                        gint           widget_y,
5981                        gint          *window_x,
5982                        gint          *window_y)
5983 {
5984   if (window_x)
5985     *window_x = widget_x - win->allocation.x;
5986
5987   if (window_y)
5988     *window_y = widget_y - win->allocation.y;
5989 }
5990
5991 static void
5992 buffer_to_text_window (GtkTextView   *text_view,
5993                        GtkTextWindow *win,
5994                        gint           buffer_x,
5995                        gint           buffer_y,
5996                        gint          *window_x,
5997                        gint          *window_y)
5998 {
5999   if (win == NULL)
6000     {
6001       g_warning ("Attempt to convert text buffer coordinates to coordinates "
6002                  "for a nonexistent or private child window of GtkTextView");
6003       return;
6004     }
6005
6006   buffer_to_widget (text_view,
6007                     buffer_x, buffer_y,
6008                     window_x, window_y);
6009
6010   widget_to_text_window (win,
6011                          window_x ? *window_x : 0,
6012                          window_y ? *window_y : 0,
6013                          window_x,
6014                          window_y);
6015 }
6016
6017 /**
6018  * gtk_text_view_buffer_to_window_coords:
6019  * @text_view: a #GtkTextView
6020  * @win: a #GtkTextWindowType
6021  * @buffer_x: buffer x coordinate
6022  * @buffer_y: buffer y coordinate
6023  * @window_x: window x coordinate return location
6024  * @window_y: window y coordinate return location
6025  *
6026  * Converts coordinate (@buffer_x, @buffer_y) to coordinates for the window
6027  * @win, and stores the result in (@window_x, @window_y).
6028  **/
6029 void
6030 gtk_text_view_buffer_to_window_coords (GtkTextView      *text_view,
6031                                        GtkTextWindowType win,
6032                                        gint              buffer_x,
6033                                        gint              buffer_y,
6034                                        gint             *window_x,
6035                                        gint             *window_y)
6036 {
6037   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6038
6039   switch (win)
6040     {
6041     case GTK_TEXT_WINDOW_WIDGET:
6042       buffer_to_widget (text_view,
6043                         buffer_x, buffer_y,
6044                         window_x, window_y);
6045       break;
6046
6047     case GTK_TEXT_WINDOW_TEXT:
6048       if (window_x)
6049         *window_x = buffer_x - text_view->xoffset;
6050       if (window_y)
6051         *window_y = buffer_y - text_view->yoffset;
6052       break;
6053
6054     case GTK_TEXT_WINDOW_LEFT:
6055       buffer_to_text_window (text_view,
6056                              text_view->left_window,
6057                              buffer_x, buffer_y,
6058                              window_x, window_y);
6059       break;
6060
6061     case GTK_TEXT_WINDOW_RIGHT:
6062       buffer_to_text_window (text_view,
6063                              text_view->right_window,
6064                              buffer_x, buffer_y,
6065                              window_x, window_y);
6066       break;
6067
6068     case GTK_TEXT_WINDOW_TOP:
6069       buffer_to_text_window (text_view,
6070                              text_view->top_window,
6071                              buffer_x, buffer_y,
6072                              window_x, window_y);
6073       break;
6074
6075     case GTK_TEXT_WINDOW_BOTTOM:
6076       buffer_to_text_window (text_view,
6077                              text_view->bottom_window,
6078                              buffer_x, buffer_y,
6079                              window_x, window_y);
6080       break;
6081
6082     case GTK_TEXT_WINDOW_PRIVATE:
6083       g_warning ("%s: can't get coords for private windows", G_STRLOC);
6084       break;
6085
6086     default:
6087       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
6088       break;
6089     }
6090 }
6091
6092 static void
6093 widget_to_buffer (GtkTextView *text_view,
6094                   gint         widget_x,
6095                   gint         widget_y,
6096                   gint        *buffer_x,
6097                   gint        *buffer_y)
6098 {
6099   gint focus_edge_width;
6100   gboolean interior_focus;
6101
6102   gtk_widget_style_get (GTK_WIDGET (text_view), "interior_focus", &interior_focus, NULL);
6103
6104   if (interior_focus)
6105     focus_edge_width = 0;
6106   else
6107     focus_edge_width = 1;
6108
6109   if (buffer_x)
6110     {
6111       *buffer_x = widget_x - focus_edge_width + text_view->xoffset;
6112       if (text_view->left_window)
6113         *buffer_x -= text_view->left_window->allocation.width;
6114     }
6115
6116   if (buffer_y)
6117     {
6118       *buffer_y = widget_y - focus_edge_width + text_view->yoffset;
6119       if (text_view->top_window)
6120         *buffer_y -= text_view->top_window->allocation.height;
6121     }
6122 }
6123
6124 static void
6125 text_window_to_widget (GtkTextWindow *win,
6126                        gint           window_x,
6127                        gint           window_y,
6128                        gint          *widget_x,
6129                        gint          *widget_y)
6130 {
6131   if (widget_x)
6132     *widget_x = window_x + win->allocation.x;
6133
6134   if (widget_y)
6135     *widget_y = window_y + win->allocation.y;
6136 }
6137
6138 static void
6139 text_window_to_buffer (GtkTextView   *text_view,
6140                        GtkTextWindow *win,
6141                        gint           window_x,
6142                        gint           window_y,
6143                        gint          *buffer_x,
6144                        gint          *buffer_y)
6145 {
6146   if (win == NULL)
6147     {
6148       g_warning ("Attempt to convert GtkTextView buffer coordinates into "
6149                  "coordinates for a nonexistent child window.");
6150       return;
6151     }
6152
6153   text_window_to_widget (win,
6154                          window_x,
6155                          window_y,
6156                          buffer_x,
6157                          buffer_y);
6158
6159   widget_to_buffer (text_view,
6160                     buffer_x ? *buffer_x : 0,
6161                     buffer_y ? *buffer_y : 0,
6162                     buffer_x,
6163                     buffer_y);
6164 }
6165
6166 /**
6167  * gtk_text_view_window_to_buffer_coords:
6168  * @text_view: a #GtkTextView
6169  * @win: a #GtkTextWindowType
6170  * @window_x: window x coordinate
6171  * @window_y: window y coordinate
6172  * @buffer_x: buffer x coordinate return location
6173  * @buffer_y: buffer y coordinate return location
6174  *
6175  * Converts coordinates on the window identified by @win to buffer
6176  * coordinates, storing the result in (@buffer_x,@buffer_y).
6177  **/
6178 void
6179 gtk_text_view_window_to_buffer_coords (GtkTextView      *text_view,
6180                                        GtkTextWindowType win,
6181                                        gint              window_x,
6182                                        gint              window_y,
6183                                        gint             *buffer_x,
6184                                        gint             *buffer_y)
6185 {
6186   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6187
6188   switch (win)
6189     {
6190     case GTK_TEXT_WINDOW_WIDGET:
6191       widget_to_buffer (text_view,
6192                         window_x, window_y,
6193                         buffer_x, buffer_y);
6194       break;
6195
6196     case GTK_TEXT_WINDOW_TEXT:
6197       if (buffer_x)
6198         *buffer_x = window_x + text_view->xoffset;
6199       if (buffer_y)
6200         *buffer_y = window_y + text_view->yoffset;
6201       break;
6202
6203     case GTK_TEXT_WINDOW_LEFT:
6204       text_window_to_buffer (text_view,
6205                              text_view->left_window,
6206                              window_x, window_y,
6207                              buffer_x, buffer_y);
6208       break;
6209
6210     case GTK_TEXT_WINDOW_RIGHT:
6211       text_window_to_buffer (text_view,
6212                              text_view->right_window,
6213                              window_x, window_y,
6214                              buffer_x, buffer_y);
6215       break;
6216
6217     case GTK_TEXT_WINDOW_TOP:
6218       text_window_to_buffer (text_view,
6219                              text_view->top_window,
6220                              window_x, window_y,
6221                              buffer_x, buffer_y);
6222       break;
6223
6224     case GTK_TEXT_WINDOW_BOTTOM:
6225       text_window_to_buffer (text_view,
6226                              text_view->bottom_window,
6227                              window_x, window_y,
6228                              buffer_x, buffer_y);
6229       break;
6230
6231     case GTK_TEXT_WINDOW_PRIVATE:
6232       g_warning ("%s: can't get coords for private windows", G_STRLOC);
6233       break;
6234
6235     default:
6236       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
6237       break;
6238     }
6239 }
6240
6241 static void
6242 set_window_width (GtkTextView      *text_view,
6243                   gint              width,
6244                   GtkTextWindowType type,
6245                   GtkTextWindow   **winp)
6246 {
6247   if (width == 0)
6248     {
6249       if (*winp)
6250         {
6251           text_window_free (*winp);
6252           *winp = NULL;
6253           gtk_widget_queue_resize (GTK_WIDGET (text_view));
6254         }
6255     }
6256   else
6257     {
6258       if (*winp == NULL)
6259         {
6260           *winp = text_window_new (type,
6261                                    GTK_WIDGET (text_view),
6262                                    width, 0);
6263           /* if the widget is already realized we need to realize the child manually */
6264           if (GTK_WIDGET_REALIZED (text_view))
6265             text_window_realize (*winp, GTK_WIDGET (text_view)->window);
6266         }
6267       else
6268         {
6269           if ((*winp)->requisition.width == width)
6270             return;
6271         }
6272
6273       gtk_widget_queue_resize (GTK_WIDGET (text_view));
6274     }
6275 }
6276
6277
6278 static void
6279 set_window_height (GtkTextView      *text_view,
6280                    gint              height,
6281                    GtkTextWindowType type,
6282                    GtkTextWindow   **winp)
6283 {
6284   if (height == 0)
6285     {
6286       if (*winp)
6287         {
6288           text_window_free (*winp);
6289           *winp = NULL;
6290           gtk_widget_queue_resize (GTK_WIDGET (text_view));
6291         }
6292     }
6293   else
6294     {
6295       if (*winp == NULL)
6296         {
6297           *winp = text_window_new (type,
6298                                    GTK_WIDGET (text_view),
6299                                    0, height);
6300
6301           /* if the widget is already realized we need to realize the child manually */
6302           if (GTK_WIDGET_REALIZED (text_view))
6303             text_window_realize (*winp, GTK_WIDGET (text_view)->window);
6304         }
6305       else
6306         {
6307           if ((*winp)->requisition.height == height)
6308             return;
6309         }
6310
6311       gtk_widget_queue_resize (GTK_WIDGET (text_view));
6312     }
6313 }
6314
6315 /**
6316  * gtk_text_view_set_border_window_size:
6317  * @text_view: a #GtkTextView
6318  * @type: window to affect
6319  * @size: width or height of the window
6320  *
6321  * Sets the width of %GTK_TEXT_WINDOW_LEFT or %GTK_TEXT_WINDOW_RIGHT,
6322  * or the height of %GTK_TEXT_WINDOW_TOP or %GTK_TEXT_WINDOW_BOTTOM.
6323  * Automatically destroys the corresponding window if the size is set
6324  * to 0, and creates the window if the size is set to non-zero.  This
6325  * function can only be used for the "border windows," it doesn't work
6326  * with #GTK_TEXT_WINDOW_WIDGET, #GTK_TEXT_WINDOW_TEXT, or
6327  * #GTK_TEXT_WINDOW_PRIVATE.
6328  **/
6329 void
6330 gtk_text_view_set_border_window_size (GtkTextView      *text_view,
6331                                       GtkTextWindowType type,
6332                                       gint              size)
6333
6334 {
6335   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6336   g_return_if_fail (size >= 0);
6337
6338   switch (type)
6339     {
6340     case GTK_TEXT_WINDOW_LEFT:
6341       set_window_width (text_view, size, GTK_TEXT_WINDOW_LEFT,
6342                         &text_view->left_window);
6343       break;
6344
6345     case GTK_TEXT_WINDOW_RIGHT:
6346       set_window_width (text_view, size, GTK_TEXT_WINDOW_RIGHT,
6347                         &text_view->right_window);
6348       break;
6349
6350     case GTK_TEXT_WINDOW_TOP:
6351       set_window_height (text_view, size, GTK_TEXT_WINDOW_TOP,
6352                          &text_view->top_window);
6353       break;
6354
6355     case GTK_TEXT_WINDOW_BOTTOM:
6356       set_window_height (text_view, size, GTK_TEXT_WINDOW_BOTTOM,
6357                          &text_view->bottom_window);
6358       break;
6359
6360     default:
6361       g_warning ("Can only set size of left/right/top/bottom border windows with gtk_text_view_set_border_window_size()");
6362       break;
6363     }
6364 }
6365
6366 /**
6367  * gtk_text_view_get_border_window_size:
6368  * @text_view: a #GtkTextView
6369  * @type: window to return size from
6370  *
6371  * Gets the width of the specified border window. See
6372  * gtk_text_view_set_border_window_size().
6373  *
6374  * Return value: width of window
6375  **/
6376 gint
6377 gtk_text_view_get_border_window_size (GtkTextView       *text_view,
6378                                       GtkTextWindowType  type)
6379 {
6380   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
6381
6382   switch (type)
6383     {
6384     case GTK_TEXT_WINDOW_LEFT:
6385       if (text_view->left_window)
6386         return text_view->left_window->requisition.width;
6387
6388     case GTK_TEXT_WINDOW_RIGHT:
6389       if (text_view->right_window)
6390         return text_view->right_window->requisition.width;
6391
6392     case GTK_TEXT_WINDOW_TOP:
6393       if (text_view->top_window)
6394         return text_view->top_window->requisition.height;
6395
6396     case GTK_TEXT_WINDOW_BOTTOM:
6397       if (text_view->bottom_window)
6398         return text_view->bottom_window->requisition.height;
6399
6400     default:
6401       g_warning ("Can only get size of left/right/top/bottom border windows with gtk_text_view_get_border_window_size()");
6402       break;
6403     }
6404
6405   return 0;
6406 }
6407
6408 /*
6409  * Child widgets
6410  */
6411
6412 static GtkTextViewChild*
6413 text_view_child_new_anchored (GtkWidget          *child,
6414                               GtkTextChildAnchor *anchor,
6415                               GtkTextLayout      *layout)
6416 {
6417   GtkTextViewChild *vc;
6418
6419   vc = g_new (GtkTextViewChild, 1);
6420
6421   vc->widget = child;
6422   vc->anchor = anchor;
6423
6424   vc->from_top_of_line = 0;
6425   vc->from_left_of_buffer = 0;
6426
6427   g_object_ref (G_OBJECT (vc->widget));
6428   g_object_ref (G_OBJECT (vc->anchor));
6429
6430   g_object_set_data (G_OBJECT (child),
6431                      "gtk-text-view-child",
6432                      vc);
6433
6434   gtk_text_child_anchor_register_child (anchor, child, layout);
6435
6436   return vc;
6437 }
6438
6439 static GtkTextViewChild*
6440 text_view_child_new_window (GtkWidget          *child,
6441                             GtkTextWindowType   type,
6442                             gint                x,
6443                             gint                y)
6444 {
6445   GtkTextViewChild *vc;
6446
6447   vc = g_new (GtkTextViewChild, 1);
6448
6449   vc->widget = child;
6450   vc->anchor = NULL;
6451
6452   vc->from_top_of_line = 0;
6453   vc->from_left_of_buffer = 0;
6454
6455   g_object_ref (G_OBJECT (vc->widget));
6456
6457   vc->type = type;
6458   vc->x = x;
6459   vc->y = y;
6460
6461   return vc;
6462 }
6463
6464 static void
6465 text_view_child_free (GtkTextViewChild *child)
6466 {
6467   g_object_set_data (G_OBJECT (child->widget),
6468                      "gtk-text-view-child", NULL);
6469
6470   if (child->anchor)
6471     {
6472       gtk_text_child_anchor_unregister_child (child->anchor,
6473                                               child->widget);
6474       g_object_unref (G_OBJECT (child->anchor));
6475     }
6476
6477   g_object_unref (G_OBJECT (child->widget));
6478
6479   g_free (child);
6480 }
6481
6482 static void
6483 text_view_child_set_parent_window (GtkTextView      *text_view,
6484                                    GtkTextViewChild *vc)
6485 {
6486   if (vc->anchor)
6487     gtk_widget_set_parent_window (vc->widget,
6488                                   text_view->text_window->bin_window);
6489   else
6490     {
6491       GdkWindow *window;
6492       window = gtk_text_view_get_window (text_view,
6493                                          vc->type);
6494       gtk_widget_set_parent_window (vc->widget, window);
6495     }
6496 }
6497
6498 static void
6499 add_child (GtkTextView      *text_view,
6500            GtkTextViewChild *vc)
6501 {
6502   text_view->children = g_slist_prepend (text_view->children,
6503                                          vc);
6504
6505   if (GTK_WIDGET_REALIZED (text_view))
6506     text_view_child_set_parent_window (text_view, vc);
6507
6508   gtk_widget_set_parent (vc->widget, GTK_WIDGET (text_view));
6509 }
6510
6511 void
6512 gtk_text_view_add_child_at_anchor (GtkTextView          *text_view,
6513                                    GtkWidget            *child,
6514                                    GtkTextChildAnchor   *anchor)
6515 {
6516   GtkTextViewChild *vc;
6517
6518   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6519   g_return_if_fail (GTK_IS_WIDGET (child));
6520   g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
6521   g_return_if_fail (child->parent == NULL);
6522
6523   gtk_text_view_ensure_layout (text_view);
6524
6525   vc = text_view_child_new_anchored (child, anchor,
6526                                      text_view->layout);
6527
6528   add_child (text_view, vc);
6529 }
6530
6531 void
6532 gtk_text_view_add_child_in_window (GtkTextView          *text_view,
6533                                    GtkWidget            *child,
6534                                    GtkTextWindowType     which_window,
6535                                    gint                  xpos,
6536                                    gint                  ypos)
6537 {
6538   GtkTextViewChild *vc;
6539
6540   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6541   g_return_if_fail (GTK_IS_WIDGET (child));
6542   g_return_if_fail (xpos >= 0);
6543   g_return_if_fail (ypos >= 0);
6544   g_return_if_fail (child->parent == NULL);
6545
6546   vc = text_view_child_new_window (child, which_window,
6547                                    xpos, ypos);
6548
6549   add_child (text_view, vc);
6550 }
6551
6552 void
6553 gtk_text_view_move_child          (GtkTextView          *text_view,
6554                                    GtkWidget            *child,
6555                                    gint                  xpos,
6556                                    gint                  ypos)
6557 {
6558   GtkTextViewChild *vc;
6559
6560   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6561   g_return_if_fail (GTK_IS_WIDGET (child));
6562   g_return_if_fail (xpos >= 0);
6563   g_return_if_fail (ypos >= 0);
6564   g_return_if_fail (child->parent == (GtkWidget*) text_view);
6565
6566   vc = g_object_get_data (G_OBJECT (child),
6567                           "gtk-text-view-child");
6568
6569   g_assert (vc != NULL);
6570
6571   vc->x = xpos;
6572   vc->y = ypos;
6573
6574   if (GTK_WIDGET_VISIBLE (child) && GTK_WIDGET_VISIBLE (text_view))
6575     gtk_widget_queue_resize (child);
6576 }
6577
6578
6579
6580 /* Iterator operations */
6581
6582 gboolean
6583 gtk_text_view_forward_display_line (GtkTextView *text_view,
6584                                     GtkTextIter *iter)
6585 {
6586   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6587   g_return_val_if_fail (iter != NULL, FALSE);
6588
6589   gtk_text_view_ensure_layout (text_view);
6590
6591   return gtk_text_layout_move_iter_to_next_line (text_view->layout, iter);
6592 }
6593
6594 gboolean
6595 gtk_text_view_backward_display_line (GtkTextView *text_view,
6596                                      GtkTextIter *iter)
6597 {
6598   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6599   g_return_val_if_fail (iter != NULL, FALSE);
6600
6601   gtk_text_view_ensure_layout (text_view);
6602
6603   return gtk_text_layout_move_iter_to_previous_line (text_view->layout, iter);
6604 }
6605
6606 gboolean
6607 gtk_text_view_forward_display_line_end (GtkTextView *text_view,
6608                                         GtkTextIter *iter)
6609 {
6610   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6611   g_return_val_if_fail (iter != NULL, FALSE);
6612
6613   gtk_text_view_ensure_layout (text_view);
6614
6615   return gtk_text_layout_move_iter_to_line_end (text_view->layout, iter, 1);
6616 }
6617
6618 gboolean
6619 gtk_text_view_backward_display_line_start (GtkTextView *text_view,
6620                                            GtkTextIter *iter)
6621 {
6622   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6623   g_return_val_if_fail (iter != NULL, FALSE);
6624
6625   gtk_text_view_ensure_layout (text_view);
6626
6627   return gtk_text_layout_move_iter_to_line_end (text_view->layout, iter, -1);
6628 }
6629
6630 gboolean
6631 gtk_text_view_starts_display_line (GtkTextView       *text_view,
6632                                    const GtkTextIter *iter)
6633 {
6634   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6635   g_return_val_if_fail (iter != NULL, FALSE);
6636
6637   gtk_text_view_ensure_layout (text_view);
6638
6639   return gtk_text_layout_iter_starts_line (text_view->layout, iter);
6640 }
6641
6642 gboolean
6643 gtk_text_view_move_visually (GtkTextView *text_view,
6644                              GtkTextIter *iter,
6645                              gint         count)
6646 {
6647   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6648   g_return_val_if_fail (iter != NULL, FALSE);
6649
6650   gtk_text_view_ensure_layout (text_view);
6651
6652   return gtk_text_layout_move_iter_visually (text_view->layout, iter, count);
6653 }