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

   1 /* GTK - The GIMP Toolkit
   2  * gtktextview.c Copyright (C) 2000 Red Hat, Inc.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include <string.h>
  28
  29 #define GTK_TEXT_USE_INTERNAL_UNSUPPORTED_API
  30 #include "gtkbindings.h"
  31 #include "gtkdnd.h"
  32 #include "gtkimagemenuitem.h"
  33 #include "gtkintl.h"
  34 #include "gtkmain.h"
  35 #include "gtkmarshalers.h"
  36 #include "gtkmenu.h"
  37 #include "gtkmenuitem.h"
  38 #include "gtkseparatormenuitem.h"
  39 #include "gtksettings.h"
  40 #include "gtksignal.h"
  41 #include "gtkstock.h"
  42 #include "gtktextdisplay.h"
  43 #include "gtktextview.h"
  44 #include "gtkimmulticontext.h"
  45 #include "gdk/gdkkeysyms.h"
  46 #include "gtksizegroup.h"          /* FIXME http://bugzilla.gnome.org/show_bug.cgi?id=72258 */
  47 #include "gtktextutil.h"
  48 #include "gtkwindow.h"
  49 #include <string.h>
  50
  51 /* How scrolling, validation, exposes, etc. work.
  52  *
  53  * The expose_event handler has the invariant that the onscreen lines
  54  * have been validated.
  55  *
  56  * There are two ways that onscreen lines can become invalid. The first
  57  * is to change which lines are onscreen. This happens when the value
  58  * of a scroll adjustment changes. So the code path begins in
  59  * gtk_text_view_value_changed() and goes like this:
  60  *   - gdk_window_scroll() to reflect the new adjustment value
  61  *   - validate the lines that were moved onscreen
  62  *   - gdk_window_process_updates() to handle the exposes immediately
  63  *
  64  * The second way is that you get the "invalidated" signal from the layout,
  65  * indicating that lines have become invalid. This code path begins in
  66  * invalidated_handler() and goes like this:
  67  *   - install high-priority idle which does the rest of the steps
  68  *   - if a scroll is pending from scroll_to_mark(), do the scroll,
  69  *     jumping to the gtk_text_view_value_changed() code path
  70  *   - otherwise, validate the onscreen lines
  71  *   - DO NOT process updates
  72  *
  73  * In both cases, validating the onscreen lines can trigger a scroll
  74  * due to maintaining the first_para on the top of the screen.
  75  * If validation triggers a scroll, we jump to the top of the code path
  76  * for value_changed, and bail out of the current code path.
  77  *
  78  * Also, in size_allocate, if we invalidate some lines from changing
  79  * the layout width, we need to go ahead and run the high-priority idle,
  80  * because GTK sends exposes right after doing the size allocates without
  81  * returning to the main loop. This is also why the high-priority idle
  82  * is at a higher priority than resizing.
  83  *
  84  */
  85
  86 #if 0
  87 #define DEBUG_VALIDATION_AND_SCROLLING
  88 #endif
  89
  90 #ifdef DEBUG_VALIDATION_AND_SCROLLING
  91 #define DV(x) (x)
  92 #else
  93 #define DV(x)
  94 #endif
  95
  96 #define SCREEN_WIDTH(widget) text_window_get_width (GTK_TEXT_VIEW (widget)->text_window)
  97 #define SCREEN_HEIGHT(widget) text_window_get_height (GTK_TEXT_VIEW (widget)->text_window)
  98
  99 struct _GtkTextPendingScroll
 100 {
 101   GtkTextMark   *mark;
 102   gdouble        within_margin;
 103   gboolean       use_align;
 104   gdouble        xalign;
 105   gdouble        yalign;
 106 };
 107
 108 enum
 109 {
 110   SET_SCROLL_ADJUSTMENTS,
 111   POPULATE_POPUP,
 112   MOVE_CURSOR,
 113   PAGE_HORIZONTALLY,
 114   SET_ANCHOR,
 115   INSERT_AT_CURSOR,
 116   DELETE_FROM_CURSOR,
 117   CUT_CLIPBOARD,
 118   COPY_CLIPBOARD,
 119   PASTE_CLIPBOARD,
 120   TOGGLE_OVERWRITE,
 121   MOVE_FOCUS,
 122   LAST_SIGNAL
 123 };
 124
 125 enum
 126 {
 127   PROP_0,
 128   PROP_PIXELS_ABOVE_LINES,
 129   PROP_PIXELS_BELOW_LINES,
 130   PROP_PIXELS_INSIDE_WRAP,
 131   PROP_EDITABLE,
 132   PROP_WRAP_MODE,
 133   PROP_JUSTIFICATION,
 134   PROP_LEFT_MARGIN,
 135   PROP_RIGHT_MARGIN,
 136   PROP_INDENT,
 137   PROP_TABS,
 138   PROP_CURSOR_VISIBLE,
 139   LAST_PROP
 140 };
 141
 142 static void gtk_text_view_init                 (GtkTextView      *text_view);
 143 static void gtk_text_view_class_init           (GtkTextViewClass *klass);
 144 static void gtk_text_view_destroy              (GtkObject        *object);
 145 static void gtk_text_view_finalize             (GObject          *object);
 146 static void gtk_text_view_set_property         (GObject         *object,
 147                                                 guint            prop_id,
 148                                                 const GValue    *value,
 149                                                 GParamSpec      *pspec);
 150 static void gtk_text_view_get_property         (GObject         *object,
 151                                                 guint            prop_id,
 152                                                 GValue          *value,
 153                                                 GParamSpec      *pspec);
 154 static void gtk_text_view_size_request         (GtkWidget        *widget,
 155                                                 GtkRequisition   *requisition);
 156 static void gtk_text_view_size_allocate        (GtkWidget        *widget,
 157                                                 GtkAllocation    *allocation);
 158 static void gtk_text_view_realize              (GtkWidget        *widget);
 159 static void gtk_text_view_unrealize            (GtkWidget        *widget);
 160 static void gtk_text_view_style_set            (GtkWidget        *widget,
 161                                                 GtkStyle         *previous_style);
 162 static void gtk_text_view_direction_changed    (GtkWidget        *widget,
 163                                                 GtkTextDirection  previous_direction);
 164 static gint gtk_text_view_event                (GtkWidget        *widget,
 165                                                 GdkEvent         *event);
 166 static gint gtk_text_view_key_press_event      (GtkWidget        *widget,
 167                                                 GdkEventKey      *event);
 168 static gint gtk_text_view_key_release_event    (GtkWidget        *widget,
 169                                                 GdkEventKey      *event);
 170 static gint gtk_text_view_button_press_event   (GtkWidget        *widget,
 171                                                 GdkEventButton   *event);
 172 static gint gtk_text_view_button_release_event (GtkWidget        *widget,
 173                                                 GdkEventButton   *event);
 174 static gint gtk_text_view_focus_in_event       (GtkWidget        *widget,
 175                                                 GdkEventFocus    *event);
 176 static gint gtk_text_view_focus_out_event      (GtkWidget        *widget,
 177                                                 GdkEventFocus    *event);
 178 static gint gtk_text_view_motion_event         (GtkWidget        *widget,
 179                                                 GdkEventMotion   *event);
 180 static gint gtk_text_view_expose_event         (GtkWidget        *widget,
 181                                                 GdkEventExpose   *expose);
 182 static void gtk_text_view_draw_focus           (GtkWidget        *widget);
 183 static void gtk_text_view_grab_focus           (GtkWidget        *widget);
 184 static gboolean gtk_text_view_focus            (GtkWidget        *widget,
 185                                                 GtkDirectionType  direction);
 186
 187
 188 /* Source side drag signals */
 189 static void gtk_text_view_drag_begin       (GtkWidget        *widget,
 190                                             GdkDragContext   *context);
 191 static void gtk_text_view_drag_end         (GtkWidget        *widget,
 192                                             GdkDragContext   *context);
 193 static void gtk_text_view_drag_data_get    (GtkWidget        *widget,
 194                                             GdkDragContext   *context,
 195                                             GtkSelectionData *selection_data,
 196                                             guint             info,
 197                                             guint             time);
 198 static void gtk_text_view_drag_data_delete (GtkWidget        *widget,
 199                                             GdkDragContext   *context);
 200
 201 /* Target side drag signals */
 202 static void     gtk_text_view_drag_leave         (GtkWidget        *widget,
 203                                                   GdkDragContext   *context,
 204                                                   guint             time);
 205 static gboolean gtk_text_view_drag_motion        (GtkWidget        *widget,
 206                                                   GdkDragContext   *context,
 207                                                   gint              x,
 208                                                   gint              y,
 209                                                   guint             time);
 210 static gboolean gtk_text_view_drag_drop          (GtkWidget        *widget,
 211                                                   GdkDragContext   *context,
 212                                                   gint              x,
 213                                                   gint              y,
 214                                                   guint             time);
 215 static void     gtk_text_view_drag_data_received (GtkWidget        *widget,
 216                                                   GdkDragContext   *context,
 217                                                   gint              x,
 218                                                   gint              y,
 219                                                   GtkSelectionData *selection_data,
 220                                                   guint             info,
 221                                                   guint             time);
 222
 223 static void gtk_text_view_set_scroll_adjustments (GtkTextView   *text_view,
 224                                                   GtkAdjustment *hadj,
 225                                                   GtkAdjustment *vadj);
 226 static gboolean gtk_text_view_popup_menu         (GtkWidget     *widget);
 227
 228 static void gtk_text_view_move_cursor       (GtkTextView           *text_view,
 229                                              GtkMovementStep        step,
 230                                              gint                   count,
 231                                              gboolean               extend_selection);
 232 static void gtk_text_view_page_horizontally (GtkTextView          *text_view,
 233                                              gint                  count,
 234                                              gboolean              extend_selection);
 235 static void gtk_text_view_set_anchor       (GtkTextView           *text_view);
 236 static void gtk_text_view_scroll_pages     (GtkTextView           *text_view,
 237                                             gint                   count);
 238 static void gtk_text_view_scroll_hpages    (GtkTextView           *text_view,
 239                                             gint                   count);
 240 static void gtk_text_view_insert_at_cursor (GtkTextView           *text_view,
 241                                             const gchar           *str);
 242 static void gtk_text_view_delete_from_cursor (GtkTextView           *text_view,
 243                                               GtkDeleteType          type,
 244                                               gint                   count);
 245 static void gtk_text_view_cut_clipboard    (GtkTextView           *text_view);
 246 static void gtk_text_view_copy_clipboard   (GtkTextView           *text_view);
 247 static void gtk_text_view_paste_clipboard  (GtkTextView           *text_view);
 248 static void gtk_text_view_toggle_overwrite (GtkTextView           *text_view);
 249 static void gtk_text_view_move_focus       (GtkTextView           *text_view,
 250                                             GtkDirectionType       direction_type);
 251 static void gtk_text_view_unselect         (GtkTextView           *text_view);
 252
 253 static void     gtk_text_view_validate_onscreen     (GtkTextView        *text_view);
 254 static void     gtk_text_view_get_first_para_iter   (GtkTextView        *text_view,
 255                                                      GtkTextIter        *iter);
 256 static void     gtk_text_view_update_layout_width       (GtkTextView        *text_view);
 257 static void     gtk_text_view_set_attributes_from_style (GtkTextView        *text_view,
 258                                                          GtkTextAttributes *values,
 259                                                          GtkStyle           *style);
 260 static void     gtk_text_view_ensure_layout          (GtkTextView        *text_view);
 261 static void     gtk_text_view_destroy_layout         (GtkTextView        *text_view);
 262 static void     gtk_text_view_check_keymap_direction (GtkTextView        *text_view);
 263 static void     gtk_text_view_reset_im_context       (GtkTextView        *text_view);
 264 static void     gtk_text_view_start_selection_drag   (GtkTextView        *text_view,
 265                                                       const GtkTextIter  *iter,
 266                                                       GdkEventButton     *event);
 267 static gboolean gtk_text_view_end_selection_drag     (GtkTextView        *text_view,
 268                                                       GdkEventButton     *event);
 269 static void     gtk_text_view_start_selection_dnd    (GtkTextView        *text_view,
 270                                                       const GtkTextIter  *iter,
 271                                                       GdkEventMotion     *event);
 272 static void     gtk_text_view_check_cursor_blink     (GtkTextView        *text_view);
 273 static void     gtk_text_view_pend_cursor_blink      (GtkTextView        *text_view);
 274 static void     gtk_text_view_stop_cursor_blink      (GtkTextView        *text_view);
 275
 276 static void     gtk_text_view_value_changed                (GtkAdjustment *adj,
 277                                                             GtkTextView   *view);
 278 static void     gtk_text_view_commit_handler               (GtkIMContext  *context,
 279                                                             const gchar   *str,
 280                                                             GtkTextView   *text_view);
 281 static void     gtk_text_view_commit_text                  (GtkTextView   *text_view,
 282                                                             const gchar   *text);
 283 static void     gtk_text_view_preedit_changed_handler      (GtkIMContext  *context,
 284                                                             GtkTextView   *text_view);
 285 static gboolean gtk_text_view_retrieve_surrounding_handler (GtkIMContext  *context,
 286                                                             GtkTextView   *text_view);
 287 static gboolean gtk_text_view_delete_surrounding_handler   (GtkIMContext  *context,
 288                                                             gint           offset,
 289                                                             gint           n_chars,
 290                                                             GtkTextView   *text_view);
 291
 292 static void gtk_text_view_mark_set_handler       (GtkTextBuffer     *buffer,
 293                                                   const GtkTextIter *location,
 294                                                   GtkTextMark       *mark,
 295                                                   gpointer           data);
 296 static void gtk_text_view_get_virtual_cursor_pos (GtkTextView       *text_view,
 297                                                   gint              *x,
 298                                                   gint              *y);
 299 static void gtk_text_view_set_virtual_cursor_pos (GtkTextView       *text_view,
 300                                                   gint               x,
 301                                                   gint               y);
 302
 303 static GtkAdjustment* get_hadjustment            (GtkTextView       *text_view);
 304 static GtkAdjustment* get_vadjustment            (GtkTextView       *text_view);
 305
 306 static void gtk_text_view_do_popup               (GtkTextView       *text_view,
 307                                                   GdkEventButton    *event);
 308
 309 static void gtk_text_view_queue_scroll           (GtkTextView   *text_view,
 310                                                   GtkTextMark   *mark,
 311                                                   gdouble        within_margin,
 312                                                   gboolean       use_align,
 313                                                   gdouble        xalign,
 314                                                   gdouble        yalign);
 315
 316 static gboolean gtk_text_view_flush_scroll         (GtkTextView *text_view);
 317 static void     gtk_text_view_update_adjustments   (GtkTextView *text_view);
 318 static void     gtk_text_view_invalidate           (GtkTextView *text_view);
 319 static void     gtk_text_view_flush_first_validate (GtkTextView *text_view);
 320
 321 static void gtk_text_view_update_im_spot_location (GtkTextView *text_view);
 322
 323 /* Container methods */
 324 static void gtk_text_view_add    (GtkContainer *container,
 325                                   GtkWidget    *child);
 326 static void gtk_text_view_remove (GtkContainer *container,
 327                                   GtkWidget    *child);
 328 static void gtk_text_view_forall (GtkContainer *container,
 329                                   gboolean      include_internals,
 330                                  GtkCallback   callback,
 331                                   gpointer      callback_data);
 332
 333 /* FIXME probably need the focus methods. */
 334
 335 typedef struct _GtkTextViewChild GtkTextViewChild;
 336
 337 struct _GtkTextViewChild
 338 {
 339   GtkWidget *widget;
 340
 341   GtkTextChildAnchor *anchor;
 342
 343   gint from_top_of_line;
 344   gint from_left_of_buffer;
 345
 346   /* These are ignored if anchor != NULL */
 347   GtkTextWindowType type;
 348   gint x;
 349   gint y;
 350 };
 351
 352 static GtkTextViewChild* text_view_child_new_anchored      (GtkWidget          *child,
 353                                                             GtkTextChildAnchor *anchor,
 354                                                             GtkTextLayout      *layout);
 355 static GtkTextViewChild* text_view_child_new_window        (GtkWidget          *child,
 356                                                             GtkTextWindowType   type,
 357                                                             gint                x,
 358                                                             gint                y);
 359 static void              text_view_child_free              (GtkTextViewChild   *child);
 360 static void              text_view_child_set_parent_window (GtkTextView        *text_view,
 361                                                             GtkTextViewChild   *child);
 362
 363 struct _GtkTextWindow
 364 {
 365   GtkTextWindowType type;
 366   GtkWidget *widget;
 367   GdkWindow *window;
 368   GdkWindow *bin_window;
 369   GtkRequisition requisition;
 370   GdkRectangle allocation;
 371 };
 372
 373 static GtkTextWindow *text_window_new             (GtkTextWindowType  type,
 374                                                    GtkWidget         *widget,
 375                                                    gint               width_request,
 376                                                    gint               height_request);
 377 static void           text_window_free            (GtkTextWindow     *win);
 378 static void           text_window_realize         (GtkTextWindow     *win,
 379                                                    GdkWindow         *parent);
 380 static void           text_window_unrealize       (GtkTextWindow     *win);
 381 static void           text_window_size_allocate   (GtkTextWindow     *win,
 382                                                    GdkRectangle      *rect);
 383 static void           text_window_scroll          (GtkTextWindow     *win,
 384                                                    gint               dx,
 385                                                    gint               dy);
 386 static void           text_window_invalidate_rect (GtkTextWindow     *win,
 387                                                    GdkRectangle      *rect);
 388
 389 static gint           text_window_get_width       (GtkTextWindow     *win);
 390 static gint           text_window_get_height      (GtkTextWindow     *win);
 391 static void           text_window_get_allocation  (GtkTextWindow     *win,
 392                                                    GdkRectangle      *rect);
 393
 394
 395 enum
 396 {
 397   TARGET_STRING,
 398   TARGET_TEXT,
 399   TARGET_COMPOUND_TEXT,
 400   TARGET_UTF8_STRING,
 401   TARGET_TEXT_BUFFER_CONTENTS
 402 };
 403
 404 static GtkTargetEntry target_table[] = {
 405   { "GTK_TEXT_BUFFER_CONTENTS", GTK_TARGET_SAME_APP,
 406     TARGET_TEXT_BUFFER_CONTENTS },
 407   { "UTF8_STRING", 0, TARGET_UTF8_STRING },
 408   { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
 409   { "TEXT", 0, TARGET_TEXT },
 410   { "STRING",     0, TARGET_STRING }
 411 };
 412
 413 static GtkContainerClass *parent_class = NULL;
 414 static guint signals[LAST_SIGNAL] = { 0 };
 415
 416 GtkType
 417 gtk_text_view_get_type (void)
 418 {
 419   static GtkType our_type = 0;
 420
 421   if (our_type == 0)
 422     {
 423       static const GtkTypeInfo our_info =
 424       {
 425         "GtkTextView",
 426         sizeof (GtkTextView),
 427         sizeof (GtkTextViewClass),
 428         (GtkClassInitFunc) gtk_text_view_class_init,
 429         (GtkObjectInitFunc) gtk_text_view_init,
 430         /* reserved_1 */ NULL,
 431         /* reserved_2 */ NULL,
 432         (GtkClassInitFunc) NULL
 433       };
 434
 435       our_type = gtk_type_unique (GTK_TYPE_CONTAINER, &our_info);
 436     }
 437
 438   return our_type;
 439 }
 440
 441 static void
 442 add_move_binding (GtkBindingSet  *binding_set,
 443                   guint           keyval,
 444                   guint           modmask,
 445                   GtkMovementStep step,
 446                   gint            count)
 447 {
 448   g_return_if_fail ((modmask & GDK_SHIFT_MASK) == 0);
 449
 450   gtk_binding_entry_add_signal (binding_set, keyval, modmask,
 451                                 "move_cursor", 3,
 452                                 GTK_TYPE_ENUM, step,
 453                                 GTK_TYPE_INT, count,
 454                                 GTK_TYPE_BOOL, FALSE);
 455
 456   /* Selection-extending version */
 457   gtk_binding_entry_add_signal (binding_set, keyval, modmask | GDK_SHIFT_MASK,
 458                                 "move_cursor", 3,
 459                                 GTK_TYPE_ENUM, step,
 460                                 GTK_TYPE_INT, count,
 461                                 GTK_TYPE_BOOL, TRUE);
 462 }
 463
 464 static void
 465 gtk_text_view_class_init (GtkTextViewClass *klass)
 466 {
 467   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 468   GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass);
 469   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 470   GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
 471   GtkBindingSet *binding_set;
 472
 473   parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
 474
 475   /* Default handlers and virtual methods
 476    */
 477   gobject_class->set_property = gtk_text_view_set_property;
 478   gobject_class->get_property = gtk_text_view_get_property;
 479
 480   object_class->destroy = gtk_text_view_destroy;
 481   gobject_class->finalize = gtk_text_view_finalize;
 482
 483   widget_class->realize = gtk_text_view_realize;
 484   widget_class->unrealize = gtk_text_view_unrealize;
 485   widget_class->style_set = gtk_text_view_style_set;
 486   widget_class->direction_changed = gtk_text_view_direction_changed;
 487   widget_class->size_request = gtk_text_view_size_request;
 488   widget_class->size_allocate = gtk_text_view_size_allocate;
 489   widget_class->event = gtk_text_view_event;
 490   widget_class->key_press_event = gtk_text_view_key_press_event;
 491   widget_class->key_release_event = gtk_text_view_key_release_event;
 492   widget_class->button_press_event = gtk_text_view_button_press_event;
 493   widget_class->button_release_event = gtk_text_view_button_release_event;
 494   widget_class->focus_in_event = gtk_text_view_focus_in_event;
 495   widget_class->focus_out_event = gtk_text_view_focus_out_event;
 496   widget_class->motion_notify_event = gtk_text_view_motion_event;
 497   widget_class->expose_event = gtk_text_view_expose_event;
 498   widget_class->grab_focus = gtk_text_view_grab_focus;
 499   widget_class->focus = gtk_text_view_focus;
 500
 501   widget_class->drag_begin = gtk_text_view_drag_begin;
 502   widget_class->drag_end = gtk_text_view_drag_end;
 503   widget_class->drag_data_get = gtk_text_view_drag_data_get;
 504   widget_class->drag_data_delete = gtk_text_view_drag_data_delete;
 505
 506   widget_class->drag_leave = gtk_text_view_drag_leave;
 507   widget_class->drag_motion = gtk_text_view_drag_motion;
 508   widget_class->drag_drop = gtk_text_view_drag_drop;
 509   widget_class->drag_data_received = gtk_text_view_drag_data_received;
 510
 511   widget_class->popup_menu = gtk_text_view_popup_menu;
 512
 513   container_class->add = gtk_text_view_add;
 514   container_class->remove = gtk_text_view_remove;
 515   container_class->forall = gtk_text_view_forall;
 516
 517   klass->move_cursor = gtk_text_view_move_cursor;
 518   klass->page_horizontally = gtk_text_view_page_horizontally;
 519   klass->set_anchor = gtk_text_view_set_anchor;
 520   klass->insert_at_cursor = gtk_text_view_insert_at_cursor;
 521   klass->delete_from_cursor = gtk_text_view_delete_from_cursor;
 522   klass->cut_clipboard = gtk_text_view_cut_clipboard;
 523   klass->copy_clipboard = gtk_text_view_copy_clipboard;
 524   klass->paste_clipboard = gtk_text_view_paste_clipboard;
 525   klass->toggle_overwrite = gtk_text_view_toggle_overwrite;
 526   klass->move_focus = gtk_text_view_move_focus;
 527   klass->set_scroll_adjustments = gtk_text_view_set_scroll_adjustments;
 528
 529   /*
 530    * Properties
 531    */
 532
 533   g_object_class_install_property (gobject_class,
 534                                    PROP_PIXELS_ABOVE_LINES,
 535                                    g_param_spec_int ("pixels_above_lines",
 536                                                      _("Pixels Above Lines"),
 537                                                      _("Pixels of blank space above paragraphs"),
 538                                                      0,
 539                                                      G_MAXINT,
 540                                                      0,
 541                                                      G_PARAM_READWRITE));
 542
 543   g_object_class_install_property (gobject_class,
 544                                    PROP_PIXELS_BELOW_LINES,
 545                                    g_param_spec_int ("pixels_below_lines",
 546                                                      _("Pixels Below Lines"),
 547                                                      _("Pixels of blank space below paragraphs"),
 548                                                      0,
 549                                                      G_MAXINT,
 550                                                      0,
 551                                                      G_PARAM_READWRITE));
 552
 553   g_object_class_install_property (gobject_class,
 554                                    PROP_PIXELS_INSIDE_WRAP,
 555                                    g_param_spec_int ("pixels_inside_wrap",
 556                                                      _("Pixels Inside Wrap"),
 557                                                      _("Pixels of blank space between wrapped lines in a paragraph"),
 558                                                      0,
 559                                                      G_MAXINT,
 560                                                      0,
 561                                                      G_PARAM_READWRITE));
 562
 563   g_object_class_install_property (gobject_class,
 564                                    PROP_EDITABLE,
 565                                    g_param_spec_boolean ("editable",
 566                                                          _("Editable"),
 567                                                          _("Whether the text can be modified by the user"),
 568                                                          TRUE,
 569                                                          G_PARAM_READWRITE));
 570
 571   g_object_class_install_property (gobject_class,
 572                                    PROP_WRAP_MODE,
 573                                    g_param_spec_enum ("wrap_mode",
 574                                                       _("Wrap Mode"),
 575                                                       _("Whether to wrap lines never, at word boundaries, or at character boundaries"),
 576                                                       GTK_TYPE_WRAP_MODE,
 577                                                       GTK_WRAP_NONE,
 578                                                       G_PARAM_READWRITE));
 579
 580   g_object_class_install_property (gobject_class,
 581                                    PROP_JUSTIFICATION,
 582                                    g_param_spec_enum ("justification",
 583                                                       _("Justification"),
 584                                                       _("Left, right, or center justification"),
 585                                                       GTK_TYPE_JUSTIFICATION,
 586                                                       GTK_JUSTIFY_LEFT,
 587                                                       G_PARAM_READWRITE));
 588
 589   g_object_class_install_property (gobject_class,
 590                                    PROP_LEFT_MARGIN,
 591                                    g_param_spec_int ("left_margin",
 592                                                      _("Left Margin"),
 593                                                      _("Width of the left margin in pixels"),
 594                                                      0,
 595                                                      G_MAXINT,
 596                                                      0,
 597                                                      G_PARAM_READWRITE));
 598
 599   g_object_class_install_property (gobject_class,
 600                                    PROP_RIGHT_MARGIN,
 601                                    g_param_spec_int ("right_margin",
 602                                                      _("Right Margin"),
 603                                                      _("Width of the right margin in pixels"),
 604                                                      0,
 605                                                      G_MAXINT,
 606                                                      0,
 607                                                      G_PARAM_READWRITE));
 608
 609   g_object_class_install_property (gobject_class,
 610                                    PROP_INDENT,
 611                                    g_param_spec_int ("indent",
 612                                                      _("Indent"),
 613                                                      _("Amount to indent the paragraph, in pixels"),
 614                                                      0,
 615                                                      G_MAXINT,
 616                                                      0,
 617                                                      G_PARAM_READWRITE));
 618
 619   g_object_class_install_property (gobject_class,
 620                                    PROP_TABS,
 621                                    g_param_spec_boxed ("tabs",
 622                                                        _("Tabs"),
 623                                                        _("Custom tabs for this text"),
 624                                                        PANGO_TYPE_TAB_ARRAY,
 625                                                        G_PARAM_READWRITE));
 626
 627   g_object_class_install_property (gobject_class,
 628                                    PROP_CURSOR_VISIBLE,
 629                                    g_param_spec_boolean ("cursor_visible",
 630                                                          _("Cursor Visible"),
 631                                                          _("If the insertion cursor is shown"),
 632                                                          TRUE,
 633                                                          G_PARAM_READWRITE));
 634
 635
 636   /*
 637    * Signals
 638    */
 639
 640   signals[MOVE_CURSOR] =
 641     gtk_signal_new ("move_cursor",
 642                     GTK_RUN_LAST | GTK_RUN_ACTION,
 643                     GTK_CLASS_TYPE (object_class),
 644                     GTK_SIGNAL_OFFSET (GtkTextViewClass, move_cursor),
 645                     _gtk_marshal_VOID__ENUM_INT_BOOLEAN,
 646                     GTK_TYPE_NONE, 3, GTK_TYPE_MOVEMENT_STEP, GTK_TYPE_INT, GTK_TYPE_BOOL);
 647
 648   signals[PAGE_HORIZONTALLY] =
 649     gtk_signal_new ("page_horizontally",
 650                     GTK_RUN_LAST | GTK_RUN_ACTION,
 651                     GTK_CLASS_TYPE (object_class),
 652                     GTK_SIGNAL_OFFSET (GtkTextViewClass, page_horizontally),
 653                     _gtk_marshal_VOID__INT_BOOLEAN,
 654                     GTK_TYPE_NONE, 2, GTK_TYPE_INT, GTK_TYPE_BOOL);
 655
 656   signals[SET_ANCHOR] =
 657     gtk_signal_new ("set_anchor",
 658                     GTK_RUN_LAST | GTK_RUN_ACTION,
 659                     GTK_CLASS_TYPE (object_class),
 660                     GTK_SIGNAL_OFFSET (GtkTextViewClass, set_anchor),
 661                     _gtk_marshal_VOID__VOID,
 662                     GTK_TYPE_NONE, 0);
 663
 664   signals[INSERT_AT_CURSOR] =
 665     gtk_signal_new ("insert_at_cursor",
 666                     GTK_RUN_LAST | GTK_RUN_ACTION,
 667                     GTK_CLASS_TYPE (object_class),
 668                     GTK_SIGNAL_OFFSET (GtkTextViewClass, insert_at_cursor),
 669                     _gtk_marshal_VOID__STRING,
 670                     GTK_TYPE_NONE, 1, GTK_TYPE_STRING);
 671
 672   signals[DELETE_FROM_CURSOR] =
 673     gtk_signal_new ("delete_from_cursor",
 674                     GTK_RUN_LAST | GTK_RUN_ACTION,
 675                     GTK_CLASS_TYPE (object_class),
 676                     GTK_SIGNAL_OFFSET (GtkTextViewClass, delete_from_cursor),
 677                     _gtk_marshal_VOID__ENUM_INT,
 678                     GTK_TYPE_NONE, 2, GTK_TYPE_DELETE_TYPE, GTK_TYPE_INT);
 679
 680   signals[CUT_CLIPBOARD] =
 681     gtk_signal_new ("cut_clipboard",
 682                     GTK_RUN_LAST | GTK_RUN_ACTION,
 683                     GTK_CLASS_TYPE (object_class),
 684                     GTK_SIGNAL_OFFSET (GtkTextViewClass, cut_clipboard),
 685                     _gtk_marshal_VOID__VOID,
 686                     GTK_TYPE_NONE, 0);
 687
 688   signals[COPY_CLIPBOARD] =
 689     gtk_signal_new ("copy_clipboard",
 690                     GTK_RUN_LAST | GTK_RUN_ACTION,
 691                     GTK_CLASS_TYPE (object_class),
 692                     GTK_SIGNAL_OFFSET (GtkTextViewClass, copy_clipboard),
 693                     _gtk_marshal_VOID__VOID,
 694                     GTK_TYPE_NONE, 0);
 695
 696   signals[PASTE_CLIPBOARD] =
 697     gtk_signal_new ("paste_clipboard",
 698                     GTK_RUN_LAST | GTK_RUN_ACTION,
 699                     GTK_CLASS_TYPE (object_class),
 700                     GTK_SIGNAL_OFFSET (GtkTextViewClass, paste_clipboard),
 701                     _gtk_marshal_VOID__VOID,
 702                     GTK_TYPE_NONE, 0);
 703
 704   signals[TOGGLE_OVERWRITE] =
 705     gtk_signal_new ("toggle_overwrite",
 706                     GTK_RUN_LAST | GTK_RUN_ACTION,
 707                     GTK_CLASS_TYPE (object_class),
 708                     GTK_SIGNAL_OFFSET (GtkTextViewClass, toggle_overwrite),
 709                     _gtk_marshal_VOID__VOID,
 710                     GTK_TYPE_NONE, 0);
 711
 712   signals[MOVE_FOCUS] =
 713     gtk_signal_new ("move_focus",
 714                     GTK_RUN_LAST | GTK_RUN_ACTION,
 715                     GTK_CLASS_TYPE (object_class),
 716                     GTK_SIGNAL_OFFSET (GtkTextViewClass, move_focus),
 717                     _gtk_marshal_VOID__ENUM,
 718                     GTK_TYPE_NONE, 1, GTK_TYPE_DIRECTION_TYPE);
 719
 720   signals[SET_SCROLL_ADJUSTMENTS] =
 721     gtk_signal_new ("set_scroll_adjustments",
 722                     GTK_RUN_LAST,
 723                     GTK_CLASS_TYPE (object_class),
 724                     GTK_SIGNAL_OFFSET (GtkTextViewClass, set_scroll_adjustments),
 725                     _gtk_marshal_VOID__OBJECT_OBJECT,
 726                     GTK_TYPE_NONE, 2, GTK_TYPE_ADJUSTMENT, GTK_TYPE_ADJUSTMENT);
 727   widget_class->set_scroll_adjustments_signal = signals[SET_SCROLL_ADJUSTMENTS];
 728
 729   signals[POPULATE_POPUP] =
 730     gtk_signal_new ("populate_popup",
 731                     GTK_RUN_LAST,
 732                     GTK_CLASS_TYPE (object_class),
 733                     GTK_SIGNAL_OFFSET (GtkTextViewClass, populate_popup),
 734                     _gtk_marshal_VOID__OBJECT,
 735                     GTK_TYPE_NONE, 1, GTK_TYPE_MENU);
 736
 737   /*
 738    * Key bindings
 739    */
 740
 741   binding_set = gtk_binding_set_by_class (klass);
 742
 743   /* Moving the insertion point */
 744   add_move_binding (binding_set, GDK_Right, 0,
 745                     GTK_MOVEMENT_VISUAL_POSITIONS, 1);
 746
 747   add_move_binding (binding_set, GDK_KP_Right, 0,
 748                     GTK_MOVEMENT_VISUAL_POSITIONS, 1);
 749
 750   add_move_binding (binding_set, GDK_Left, 0,
 751                     GTK_MOVEMENT_VISUAL_POSITIONS, -1);
 752
 753   add_move_binding (binding_set, GDK_KP_Left, 0,
 754                     GTK_MOVEMENT_VISUAL_POSITIONS, -1);
 755
 756   add_move_binding (binding_set, GDK_Right, GDK_CONTROL_MASK,
 757                     GTK_MOVEMENT_WORDS, 1);
 758
 759   add_move_binding (binding_set, GDK_KP_Right, GDK_CONTROL_MASK,
 760                     GTK_MOVEMENT_WORDS, 1);
 761
 762   add_move_binding (binding_set, GDK_Left, GDK_CONTROL_MASK,
 763                     GTK_MOVEMENT_WORDS, -1);
 764
 765   add_move_binding (binding_set, GDK_KP_Left, GDK_CONTROL_MASK,
 766                     GTK_MOVEMENT_WORDS, 1);
 767
 768   add_move_binding (binding_set, GDK_Up, 0,
 769                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 770
 771   add_move_binding (binding_set, GDK_KP_Up, 0,
 772                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 773
 774   add_move_binding (binding_set, GDK_Down, 0,
 775                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 776
 777   add_move_binding (binding_set, GDK_KP_Down, 0,
 778                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 779
 780   add_move_binding (binding_set, GDK_Up, GDK_CONTROL_MASK,
 781                     GTK_MOVEMENT_PARAGRAPHS, -1);
 782
 783   add_move_binding (binding_set, GDK_KP_Up, GDK_CONTROL_MASK,
 784                     GTK_MOVEMENT_PARAGRAPHS, -1);
 785
 786   add_move_binding (binding_set, GDK_Down, GDK_CONTROL_MASK,
 787                     GTK_MOVEMENT_PARAGRAPHS, 1);
 788
 789   add_move_binding (binding_set, GDK_KP_Down, GDK_CONTROL_MASK,
 790                     GTK_MOVEMENT_PARAGRAPHS, 1);
 791
 792   add_move_binding (binding_set, GDK_Home, 0,
 793                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
 794
 795   add_move_binding (binding_set, GDK_KP_Home, 0,
 796                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
 797
 798   add_move_binding (binding_set, GDK_End, 0,
 799                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
 800
 801   add_move_binding (binding_set, GDK_KP_End, 0,
 802                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
 803
 804   add_move_binding (binding_set, GDK_Home, GDK_CONTROL_MASK,
 805                     GTK_MOVEMENT_BUFFER_ENDS, -1);
 806
 807   add_move_binding (binding_set, GDK_KP_Home, GDK_CONTROL_MASK,
 808                     GTK_MOVEMENT_BUFFER_ENDS, -1);
 809
 810   add_move_binding (binding_set, GDK_End, GDK_CONTROL_MASK,
 811                     GTK_MOVEMENT_BUFFER_ENDS, 1);
 812
 813   add_move_binding (binding_set, GDK_KP_End, GDK_CONTROL_MASK,
 814                     GTK_MOVEMENT_BUFFER_ENDS, 1);
 815
 816   add_move_binding (binding_set, GDK_Page_Up, 0,
 817                     GTK_MOVEMENT_PAGES, -1);
 818
 819   add_move_binding (binding_set, GDK_KP_Page_Up, 0,
 820                     GTK_MOVEMENT_PAGES, -1);
 821
 822   add_move_binding (binding_set, GDK_Page_Down, 0,
 823                     GTK_MOVEMENT_PAGES, 1);
 824
 825   add_move_binding (binding_set, GDK_KP_Page_Down, 0,
 826                     GTK_MOVEMENT_PAGES, 1);
 827
 828   /* Select all
 829    */
 830   gtk_binding_entry_add_signal (binding_set, GDK_a, GDK_CONTROL_MASK,
 831                                 "move_cursor", 3,
 832                                 GTK_TYPE_MOVEMENT_STEP, GTK_MOVEMENT_BUFFER_ENDS,
 833                                 GTK_TYPE_INT, -1,
 834                                 GTK_TYPE_BOOL, FALSE);
 835   gtk_binding_entry_add_signal (binding_set, GDK_a, GDK_CONTROL_MASK,
 836                                 "move_cursor", 3,
 837                                 GTK_TYPE_MOVEMENT_STEP, GTK_MOVEMENT_BUFFER_ENDS,
 838                                 GTK_TYPE_INT, 1,
 839                                 GTK_TYPE_BOOL, TRUE);
 840
 841
 842   gtk_binding_entry_add_signal (binding_set, GDK_Page_Up, GDK_CONTROL_MASK,
 843                                 "page_horizontally", 2,
 844                                 GTK_TYPE_INT, -1,
 845                                 GTK_TYPE_BOOL, FALSE);
 846
 847   gtk_binding_entry_add_signal (binding_set, GDK_Page_Up, GDK_CONTROL_MASK | GDK_SHIFT_MASK,
 848                                 "page_horizontally", 2,
 849                                 GTK_TYPE_INT, -1,
 850                                 GTK_TYPE_BOOL, TRUE);
 851
 852   gtk_binding_entry_add_signal (binding_set, GDK_KP_Page_Up, GDK_CONTROL_MASK,
 853                                 "page_horizontally", 2,
 854                                 GTK_TYPE_INT, -1,
 855                                 GTK_TYPE_BOOL, FALSE);
 856
 857   gtk_binding_entry_add_signal (binding_set, GDK_KP_Page_Up, GDK_CONTROL_MASK | GDK_SHIFT_MASK,
 858                                 "page_horizontally", 2,
 859                                 GTK_TYPE_INT, -1,
 860                                 GTK_TYPE_BOOL, TRUE);
 861
 862   gtk_binding_entry_add_signal (binding_set, GDK_Page_Down, GDK_CONTROL_MASK,
 863                                 "page_horizontally", 2,
 864                                 GTK_TYPE_INT, 1,
 865                                 GTK_TYPE_BOOL, FALSE);
 866
 867   gtk_binding_entry_add_signal (binding_set, GDK_Page_Down, GDK_CONTROL_MASK | GDK_SHIFT_MASK,
 868                                 "page_horizontally", 2,
 869                                 GTK_TYPE_INT, 1,
 870                                 GTK_TYPE_BOOL, TRUE);
 871
 872   gtk_binding_entry_add_signal (binding_set, GDK_KP_Page_Down, GDK_CONTROL_MASK,
 873                                 "page_horizontally", 2,
 874                                 GTK_TYPE_INT, 1,
 875                                 GTK_TYPE_BOOL, FALSE);
 876
 877   gtk_binding_entry_add_signal (binding_set, GDK_KP_Page_Down, GDK_CONTROL_MASK | GDK_SHIFT_MASK,
 878                                 "page_horizontally", 2,
 879                                 GTK_TYPE_INT, 1,
 880                                 GTK_TYPE_BOOL, TRUE);
 881
 882   /* Deleting text */
 883   gtk_binding_entry_add_signal (binding_set, GDK_Delete, 0,
 884                                 "delete_from_cursor", 2,
 885                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 886                                 GTK_TYPE_INT, 1);
 887
 888   gtk_binding_entry_add_signal (binding_set, GDK_KP_Delete, 0,
 889                                 "delete_from_cursor", 2,
 890                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 891                                 GTK_TYPE_INT, 1);
 892
 893   gtk_binding_entry_add_signal (binding_set, GDK_BackSpace, 0,
 894                                 "delete_from_cursor", 2,
 895                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 896                                 GTK_TYPE_INT, -1);
 897
 898   gtk_binding_entry_add_signal (binding_set, GDK_Delete, GDK_CONTROL_MASK,
 899                                 "delete_from_cursor", 2,
 900                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 901                                 GTK_TYPE_INT, 1);
 902
 903   gtk_binding_entry_add_signal (binding_set, GDK_KP_Delete, GDK_CONTROL_MASK,
 904                                 "delete_from_cursor", 2,
 905                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 906                                 GTK_TYPE_INT, 1);
 907
 908   gtk_binding_entry_add_signal (binding_set, GDK_BackSpace, GDK_CONTROL_MASK,
 909                                 "delete_from_cursor", 2,
 910                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 911                                 GTK_TYPE_INT, -1);
 912
 913   /* Cut/copy/paste */
 914
 915   gtk_binding_entry_add_signal (binding_set, GDK_x, GDK_CONTROL_MASK,
 916                                 "cut_clipboard", 0);
 917
 918   gtk_binding_entry_add_signal (binding_set, GDK_c, GDK_CONTROL_MASK,
 919                                 "copy_clipboard", 0);
 920
 921   gtk_binding_entry_add_signal (binding_set, GDK_v, GDK_CONTROL_MASK,
 922                                 "paste_clipboard", 0);
 923
 924   /* Overwrite */
 925   gtk_binding_entry_add_signal (binding_set, GDK_Insert, 0,
 926                                 "toggle_overwrite", 0);
 927   gtk_binding_entry_add_signal (binding_set, GDK_KP_Insert, 0,
 928                                 "toggle_overwrite", 0);
 929
 930   /* Control-tab focus motion */
 931   gtk_binding_entry_add_signal (binding_set, GDK_Tab, GDK_CONTROL_MASK,
 932                                 "move_focus", 1,
 933                                 GTK_TYPE_DIRECTION_TYPE, GTK_DIR_TAB_FORWARD);
 934   gtk_binding_entry_add_signal (binding_set, GDK_KP_Tab, GDK_CONTROL_MASK,
 935                                 "move_focus", 1,
 936                                 GTK_TYPE_DIRECTION_TYPE, GTK_DIR_TAB_FORWARD);
 937
 938   gtk_binding_entry_add_signal (binding_set, GDK_Tab, GDK_SHIFT_MASK | GDK_CONTROL_MASK,
 939                                 "move_focus", 1,
 940                                 GTK_TYPE_DIRECTION_TYPE, GTK_DIR_TAB_BACKWARD);
 941   gtk_binding_entry_add_signal (binding_set, GDK_KP_Tab, GDK_SHIFT_MASK | GDK_CONTROL_MASK,
 942                                 "move_focus", 1,
 943                                 GTK_TYPE_DIRECTION_TYPE, GTK_DIR_TAB_BACKWARD);
 944 }
 945
 946 static void
 947 gtk_text_view_init (GtkTextView *text_view)
 948 {
 949   GtkWidget *widget;
 950
 951   widget = GTK_WIDGET (text_view);
 952
 953   GTK_WIDGET_SET_FLAGS (widget, GTK_CAN_FOCUS);
 954
 955   /* Set up default style */
 956   text_view->wrap_mode = GTK_WRAP_NONE;
 957   text_view->pixels_above_lines = 0;
 958   text_view->pixels_below_lines = 0;
 959   text_view->pixels_inside_wrap = 0;
 960   text_view->justify = GTK_JUSTIFY_LEFT;
 961   text_view->left_margin = 0;
 962   text_view->right_margin = 0;
 963   text_view->indent = 0;
 964   text_view->tabs = NULL;
 965   text_view->editable = TRUE;
 966
 967   gtk_drag_dest_set (widget,
 968                      0,
 969                      target_table, G_N_ELEMENTS (target_table),
 970                      GDK_ACTION_COPY | GDK_ACTION_MOVE);
 971
 972   text_view->virtual_cursor_x = -1;
 973   text_view->virtual_cursor_y = -1;
 974
 975   /* This object is completely private. No external entity can gain a reference
 976    * to it; so we create it here and destroy it in finalize ().
 977    */
 978   text_view->im_context = gtk_im_multicontext_new ();
 979
 980   g_signal_connect (G_OBJECT (text_view->im_context), "commit",
 981                     G_CALLBACK (gtk_text_view_commit_handler), text_view);
 982   g_signal_connect (G_OBJECT (text_view->im_context), "preedit_changed",
 983                     G_CALLBACK (gtk_text_view_preedit_changed_handler), text_view);
 984   g_signal_connect (G_OBJECT (text_view->im_context), "retrieve_surrounding",
 985                     G_CALLBACK (gtk_text_view_retrieve_surrounding_handler), text_view);
 986   g_signal_connect (G_OBJECT (text_view->im_context), "delete_surrounding",
 987                     G_CALLBACK (gtk_text_view_delete_surrounding_handler), text_view);
 988
 989   text_view->cursor_visible = TRUE;
 990
 991   text_view->text_window = text_window_new (GTK_TEXT_WINDOW_TEXT,
 992                                             widget, 200, 200);
 993
 994   text_view->drag_start_x = -1;
 995   text_view->drag_start_y = -1;
 996
 997   text_view->pending_place_cursor_button = 0;
 998
 999   /* We handle all our own redrawing */
1000   gtk_widget_set_redraw_on_allocate (widget, FALSE);
1001 }
1002
1003 /**
1004  * gtk_text_view_new:
1005  *
1006  * Creates a new #GtkTextView. If you don't call gtk_text_view_set_buffer()
1007  * before using the text view, an empty default buffer will be created
1008  * for you. Get the buffer with gtk_text_view_get_buffer(). If you want
1009  * to specify your own buffer, consider gtk_text_view_new_with_buffer().
1010  *
1011  * Return value: a new #GtkTextView
1012  **/
1013 GtkWidget*
1014 gtk_text_view_new (void)
1015 {
1016   return GTK_WIDGET (gtk_type_new (gtk_text_view_get_type ()));
1017 }
1018
1019 /**
1020  * gtk_text_view_new_with_buffer:
1021  * @buffer: a #GtkTextBuffer
1022  *
1023  * Creates a new #GtkTextView widget displaying the buffer
1024  * @buffer. One buffer can be shared among many widgets.
1025  * @buffer may be NULL to create a default buffer, in which case
1026  * this function is equivalent to gtk_text_view_new(). The
1027  * text view adds its own reference count to the buffer; it does not
1028  * take over an existing reference.
1029  *
1030  * Return value: a new #GtkTextView.
1031  **/
1032 GtkWidget*
1033 gtk_text_view_new_with_buffer (GtkTextBuffer *buffer)
1034 {
1035   GtkTextView *text_view;
1036
1037   text_view = (GtkTextView*)gtk_text_view_new ();
1038
1039   gtk_text_view_set_buffer (text_view, buffer);
1040
1041   return GTK_WIDGET (text_view);
1042 }
1043
1044 /**
1045  * gtk_text_view_set_buffer:
1046  * @text_view: a #GtkTextView
1047  * @buffer: a #GtkTextBuffer
1048  *
1049  * Sets @buffer as the buffer being displayed by @text_view. The previous
1050  * buffer displayed by the text view is unreferenced, and a reference is
1051  * added to @buffer. If you owned a reference to @buffer before passing it
1052  * to this function, you must remove that reference yourself; #GtkTextView
1053  * will not "adopt" it.
1054  *
1055  **/
1056 void
1057 gtk_text_view_set_buffer (GtkTextView   *text_view,
1058                           GtkTextBuffer *buffer)
1059 {
1060   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1061   g_return_if_fail (buffer == NULL || GTK_IS_TEXT_BUFFER (buffer));
1062
1063   if (text_view->buffer == buffer)
1064     return;
1065
1066   if (text_view->buffer != NULL)
1067     {
1068       /* Destroy all anchored children */
1069       GSList *tmp_list;
1070       GSList *copy;
1071
1072       copy = g_slist_copy (text_view->children);
1073       tmp_list = copy;
1074       while (tmp_list != NULL)
1075         {
1076           GtkTextViewChild *vc = tmp_list->data;
1077
1078           if (vc->anchor)
1079             {
1080               gtk_widget_destroy (vc->widget);
1081               /* vc may now be invalid! */
1082             }
1083
1084           tmp_list = g_slist_next (tmp_list);
1085         }
1086
1087       g_slist_free (copy);
1088
1089       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->buffer),
1090                                             gtk_text_view_mark_set_handler, text_view);
1091       g_object_unref (G_OBJECT (text_view->buffer));
1092       text_view->dnd_mark = NULL;
1093
1094       if (GTK_WIDGET_REALIZED (text_view))
1095         gtk_text_buffer_remove_selection_clipboard (text_view->buffer,
1096                                                     gtk_clipboard_get (GDK_SELECTION_PRIMARY));
1097     }
1098
1099   text_view->buffer = buffer;
1100
1101   if (buffer != NULL)
1102     {
1103       GtkTextIter start;
1104
1105       g_object_ref (G_OBJECT (buffer));
1106
1107       if (text_view->layout)
1108         gtk_text_layout_set_buffer (text_view->layout, buffer);
1109
1110       gtk_text_buffer_get_iter_at_offset (text_view->buffer, &start, 0);
1111
1112       text_view->dnd_mark = gtk_text_buffer_create_mark (text_view->buffer,
1113                                                          "gtk_drag_target",
1114                                                          &start, FALSE);
1115
1116       text_view->first_para_mark = gtk_text_buffer_create_mark (text_view->buffer,
1117                                                                 NULL,
1118                                                                 &start, TRUE);
1119
1120       text_view->first_para_pixels = 0;
1121
1122       g_signal_connect (G_OBJECT (text_view->buffer), "mark_set",
1123                         G_CALLBACK (gtk_text_view_mark_set_handler), text_view);
1124
1125       if (GTK_WIDGET_REALIZED (text_view))
1126         gtk_text_buffer_add_selection_clipboard (text_view->buffer,
1127                                                  gtk_clipboard_get (GDK_SELECTION_PRIMARY));
1128     }
1129
1130   if (GTK_WIDGET_VISIBLE (text_view))
1131     gtk_widget_queue_draw (GTK_WIDGET (text_view));
1132
1133   DV(g_print ("Invalidating due to set_buffer\n"));
1134   gtk_text_view_invalidate (text_view);
1135 }
1136
1137 static GtkTextBuffer*
1138 get_buffer (GtkTextView *text_view)
1139 {
1140   if (text_view->buffer == NULL)
1141     {
1142       GtkTextBuffer *b;
1143       b = gtk_text_buffer_new (NULL);
1144       gtk_text_view_set_buffer (text_view, b);
1145       g_object_unref (G_OBJECT (b));
1146     }
1147
1148   return text_view->buffer;
1149 }
1150
1151 /**
1152  * gtk_text_view_get_buffer:
1153  * @text_view: a #GtkTextView
1154  *
1155  * Returns the #GtkTextBuffer being displayed by this text view.
1156  * The reference count on the buffer is not incremented; the caller
1157  * of this function won't own a new reference.
1158  *
1159  * Return value: a #GtkTextBuffer
1160  **/
1161 GtkTextBuffer*
1162 gtk_text_view_get_buffer (GtkTextView *text_view)
1163 {
1164   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
1165
1166   return get_buffer (text_view);
1167 }
1168
1169 /**
1170  * gtk_text_view_get_iter_at_location:
1171  * @text_view: a #GtkTextView
1172  * @iter: a #GtkTextIter
1173  * @x: x position, in buffer coordinates
1174  * @y: y position, in buffer coordinates
1175  *
1176  * Retrieves the iterator at buffer coordinates @x and @y. Buffer
1177  * coordinates are coordinates for the entire buffer, not just the
1178  * currently-displayed portion.  If you have coordinates from an
1179  * event, you have to convert those to buffer coordinates with
1180  * gtk_text_view_window_to_buffer_coords().
1181  *
1182  **/
1183 void
1184 gtk_text_view_get_iter_at_location (GtkTextView *text_view,
1185                                     GtkTextIter *iter,
1186                                     gint         x,
1187                                     gint         y)
1188 {
1189   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1190   g_return_if_fail (iter != NULL);
1191   g_return_if_fail (text_view->layout != NULL);
1192
1193   gtk_text_layout_get_iter_at_pixel (text_view->layout,
1194                                      iter,
1195                                      x,
1196                                      y);
1197 }
1198
1199 /**
1200  * gtk_text_view_get_iter_location:
1201  * @text_view: a #GtkTextView
1202  * @iter: a #GtkTextIter
1203  * @location: bounds of the character at @iter
1204  *
1205  * Gets a rectangle which roughly contains the character at @iter.
1206  * The rectangle position is in buffer coordinates; use
1207  * gtk_text_view_buffer_to_window_coords() to convert these
1208  * coordinates to coordinates for one of the windows in the text view.
1209  *
1210  **/
1211 void
1212 gtk_text_view_get_iter_location (GtkTextView       *text_view,
1213                                  const GtkTextIter *iter,
1214                                  GdkRectangle      *location)
1215 {
1216   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1217   g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
1218
1219   gtk_text_layout_get_iter_location (text_view->layout, iter, location);
1220 }
1221
1222 /**
1223  * gtk_text_view_get_line_yrange:
1224  * @text_view: a #GtkTextView
1225  * @iter: a #GtkTextIter
1226  * @y: return location for a y coordinate
1227  * @height: return location for a height
1228  *
1229  * Gets the y coordinate of the top of the line containing @iter,
1230  * and the height of the line. The coordinate is a buffer coordinate;
1231  * convert to window coordinates with gtk_text_view_buffer_to_window_coords().
1232  *
1233  **/
1234 void
1235 gtk_text_view_get_line_yrange (GtkTextView       *text_view,
1236                                const GtkTextIter *iter,
1237                                gint              *y,
1238                                gint              *height)
1239 {
1240   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1241   g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
1242
1243   gtk_text_layout_get_line_yrange (text_view->layout,
1244                                    iter,
1245                                    y,
1246                                    height);
1247 }
1248
1249 /**
1250  * gtk_text_view_get_line_at_y:
1251  * @text_view: a #GtkTextView
1252  * @target_iter: a #GtkTextIter
1253  * @y: a y coordinate
1254  * @line_top: return location for top coordinate of the line
1255  *
1256  * Gets the #GtkTextIter at the start of the line containing
1257  * the coordinate @y. @y is in buffer coordinates, convert from
1258  * window coordinates with gtk_text_view_window_to_buffer_coords().
1259  * If non-%NULL, @line_top will be filled with the coordinate of the top
1260  * edge of the line.
1261  **/
1262 void
1263 gtk_text_view_get_line_at_y (GtkTextView *text_view,
1264                              GtkTextIter *target_iter,
1265                              gint         y,
1266                              gint        *line_top)
1267 {
1268   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1269
1270   gtk_text_layout_get_line_at_y (text_view->layout,
1271                                  target_iter,
1272                                  y,
1273                                  line_top);
1274 }
1275
1276 static gboolean
1277 set_adjustment_clamped (GtkAdjustment *adj, gdouble val)
1278 {
1279   DV (g_print ("  Setting adj to raw value %g\n", val));
1280
1281   /* We don't really want to clamp to upper; we want to clamp to
1282      upper - page_size which is the highest value the scrollbar
1283      will let us reach. */
1284   if (val > (adj->upper - adj->page_size))
1285     val = adj->upper - adj->page_size;
1286
1287   if (val < adj->lower)
1288     val = adj->lower;
1289
1290   if (val != adj->value)
1291     {
1292       DV (g_print ("  Setting adj to clamped value %g\n", val));
1293       gtk_adjustment_set_value (adj, val);
1294       return TRUE;
1295     }
1296   else
1297     return FALSE;
1298 }
1299
1300 /**
1301  * gtk_text_view_scroll_to_iter:
1302  * @text_view: a #GtkTextView
1303  * @iter: a #GtkTextIter
1304  * @within_margin: margin as a [0.0,0.5) fraction of screen size
1305  * @use_align: whether to use alignment arguments (if %FALSE, just get the mark onscreen)
1306  * @xalign: horizontal alignment of mark within visible area.
1307  * @yalign: vertical alignment of mark within visible area
1308  *
1309  * Scrolls @text_view so that @iter is on the screen in the position
1310  * indicated by @xalign and @yalign. An alignment of 0.0 indicates
1311  * left or top, 1.0 indicates right or bottom, 0.5 means center. If @use_align
1312  * is %FALSE, the text scrolls the minimal distance to get the mark onscreen,
1313  * possibly not scrolling at all. The effective screen for purposes
1314  * of this function is reduced by a margin of size @within_margin.
1315  * NOTE: This function uses the currently-computed height of the
1316  * lines in the text buffer. Note that line heights are computed
1317  * in an idle handler; so this function may not have the desired effect
1318  * if it's called before the height computations. To avoid oddness,
1319  * consider using gtk_text_view_scroll_to_mark() which saves a point
1320  * to be scrolled to after line validation.
1321  *
1322  * Return value: %TRUE if scrolling occurred
1323  **/
1324 gboolean
1325 gtk_text_view_scroll_to_iter (GtkTextView   *text_view,
1326                               GtkTextIter   *iter,
1327                               gdouble        within_margin,
1328                               gboolean       use_align,
1329                               gdouble        xalign,
1330                               gdouble        yalign)
1331 {
1332   GdkRectangle rect;
1333   GdkRectangle screen;
1334   gint screen_bottom;
1335   gint screen_right;
1336   gint scroll_dest;
1337   GtkWidget *widget;
1338   gboolean retval = FALSE;
1339   gint scroll_inc;
1340   gint screen_xoffset, screen_yoffset;
1341   gint current_x_scroll, current_y_scroll;
1342
1343   /* FIXME why don't we do the validate-at-scroll-destination thing
1344    * from flush_scroll in this function? I think it wasn't done before
1345    * because changed_handler was screwed up, but I could be wrong.
1346    */
1347
1348   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1349   g_return_val_if_fail (iter != NULL, FALSE);
1350   g_return_val_if_fail (within_margin >= 0.0 && within_margin < 0.5, FALSE);
1351   g_return_val_if_fail (xalign >= 0.0 && xalign <= 1.0, FALSE);
1352   g_return_val_if_fail (yalign >= 0.0 && yalign <= 1.0, FALSE);
1353
1354   widget = GTK_WIDGET (text_view);
1355
1356   DV(g_print(G_STRLOC"\n"));
1357
1358   gtk_text_layout_get_iter_location (text_view->layout,
1359                                      iter,
1360                                      &rect);
1361
1362   DV (g_print (" target rect %d,%d  %d x %d\n", rect.x, rect.y, rect.width, rect.height));
1363
1364   current_x_scroll = text_view->xoffset;
1365   current_y_scroll = text_view->yoffset;
1366
1367   screen.x = current_x_scroll;
1368   screen.y = current_y_scroll;
1369   screen.width = SCREEN_WIDTH (widget);
1370   screen.height = SCREEN_HEIGHT (widget);
1371
1372   screen_xoffset = screen.width * within_margin;
1373   screen_yoffset = screen.height * within_margin;
1374
1375   screen.x += screen_xoffset;
1376   screen.y += screen_yoffset;
1377   screen.width -= screen_xoffset * 2;
1378   screen.height -= screen_yoffset * 2;
1379
1380   /* paranoia check */
1381   if (screen.width < 1)
1382     screen.width = 1;
1383   if (screen.height < 1)
1384     screen.height = 1;
1385
1386   screen_right = screen.x + screen.width;
1387   screen_bottom = screen.y + screen.height;
1388
1389   /* The alignment affects the point in the target character that we
1390    * choose to align. If we're doing right/bottom alignment, we align
1391    * the right/bottom edge of the character the mark is at; if we're
1392    * doing left/top we align the left/top edge of the character; if
1393    * we're doing center alignment we align the center of the
1394    * character.
1395    */
1396
1397   /* Vertical scroll */
1398
1399   scroll_inc = 0;
1400   scroll_dest = current_y_scroll;
1401
1402   if (use_align)
1403     {
1404       scroll_dest = rect.y + (rect.height * yalign) - (screen.height * yalign);
1405
1406       /* if scroll_dest < screen.y, we move a negative increment (up),
1407        * else a positive increment (down)
1408        */
1409       scroll_inc = scroll_dest - screen.y + screen_yoffset;
1410     }
1411   else
1412     {
1413       /* move minimum to get onscreen */
1414       if (rect.y < screen.y)
1415         {
1416           scroll_dest = rect.y;
1417           scroll_inc = scroll_dest - screen.y - screen_yoffset;
1418         }
1419       else if ((rect.y + rect.height) > screen_bottom)
1420         {
1421           scroll_dest = rect.y + rect.height;
1422           scroll_inc = scroll_dest - screen_bottom + screen_yoffset;
1423         }
1424     }
1425
1426   if (scroll_inc != 0)
1427     {
1428       retval = set_adjustment_clamped (get_vadjustment (text_view),
1429                                        current_y_scroll + scroll_inc);
1430
1431       DV (g_print (" vert increment %d\n", scroll_inc));
1432     }
1433
1434   /* Horizontal scroll */
1435
1436   scroll_inc = 0;
1437   scroll_dest = current_x_scroll;
1438
1439   if (use_align)
1440     {
1441       scroll_dest = rect.x + (rect.width * xalign) - (screen.width * xalign);
1442
1443       /* if scroll_dest < screen.y, we move a negative increment (left),
1444        * else a positive increment (right)
1445        */
1446       scroll_inc = scroll_dest - screen.x + screen_xoffset;
1447     }
1448   else
1449     {
1450       /* move minimum to get onscreen */
1451       if (rect.x < screen.x)
1452         {
1453           scroll_dest = rect.x;
1454           scroll_inc = scroll_dest - screen.x - screen_xoffset;
1455         }
1456       else if ((rect.x + rect.width) > screen_right)
1457         {
1458           scroll_dest = rect.x + rect.width;
1459           scroll_inc = scroll_dest - screen_right + screen_xoffset;
1460         }
1461     }
1462
1463   if (scroll_inc != 0)
1464     {
1465       retval = set_adjustment_clamped (get_hadjustment (text_view),
1466                                        current_x_scroll + scroll_inc);
1467
1468       DV (g_print (" horiz increment %d\n", scroll_inc));
1469     }
1470
1471   if (retval)
1472     DV(g_print (">Actually scrolled ("G_STRLOC")\n"));
1473   else
1474     DV(g_print (">Didn't end up scrolling ("G_STRLOC")\n"));
1475
1476   return retval;
1477 }
1478
1479 static void
1480 free_pending_scroll (GtkTextPendingScroll *scroll)
1481 {
1482   if (!gtk_text_mark_get_deleted (scroll->mark))
1483     gtk_text_buffer_delete_mark (gtk_text_mark_get_buffer (scroll->mark),
1484                                  scroll->mark);
1485   g_object_unref (G_OBJECT (scroll->mark));
1486   g_free (scroll);
1487 }
1488
1489 static void
1490 gtk_text_view_queue_scroll (GtkTextView   *text_view,
1491                             GtkTextMark   *mark,
1492                             gdouble        within_margin,
1493                             gboolean       use_align,
1494                             gdouble        xalign,
1495                             gdouble        yalign)
1496 {
1497   GtkTextIter iter;
1498   GtkTextPendingScroll *scroll;
1499
1500   DV(g_print(G_STRLOC"\n"));
1501
1502   scroll = g_new (GtkTextPendingScroll, 1);
1503
1504   scroll->within_margin = within_margin;
1505   scroll->use_align = use_align;
1506   scroll->xalign = xalign;
1507   scroll->yalign = yalign;
1508
1509   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
1510
1511   scroll->mark = gtk_text_buffer_create_mark (get_buffer (text_view),
1512                                               NULL,
1513                                               &iter,
1514                                               gtk_text_mark_get_left_gravity (mark));
1515
1516   g_object_ref (G_OBJECT (scroll->mark));
1517
1518   if (text_view->pending_scroll)
1519     free_pending_scroll (text_view->pending_scroll);
1520
1521   text_view->pending_scroll = scroll;
1522 }
1523
1524 static gboolean
1525 gtk_text_view_flush_scroll (GtkTextView *text_view)
1526 {
1527   GtkTextIter iter;
1528   GtkTextPendingScroll *scroll;
1529   gboolean retval;
1530   GtkWidget *widget;
1531
1532   widget = GTK_WIDGET (text_view);
1533
1534   DV(g_print(G_STRLOC"\n"));
1535
1536   if (text_view->pending_scroll == NULL)
1537     {
1538       DV (g_print ("in flush scroll, no pending scroll\n"));
1539       return FALSE;
1540     }
1541
1542   scroll = text_view->pending_scroll;
1543
1544   /* avoid recursion */
1545   text_view->pending_scroll = NULL;
1546
1547   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, scroll->mark);
1548
1549   /* Validate area around the scroll destination, so the adjustment
1550    * can meaningfully point into that area. We must validate
1551    * enough area to be sure that after we scroll, everything onscreen
1552    * is valid; otherwise, validation will maintain the first para
1553    * in one place, but may push the target iter off the bottom of
1554    * the screen.
1555    */
1556   DV(g_print (">Validating scroll destination ("G_STRLOC")\n"));
1557   gtk_text_layout_validate_yrange (text_view->layout, &iter,
1558                                    - (widget->allocation.height * 2),
1559                                    widget->allocation.height * 2);
1560
1561   DV(g_print (">Done validating scroll destination ("G_STRLOC")\n"));
1562
1563   /* Ensure we have updated width/height */
1564   gtk_text_view_update_adjustments (text_view);
1565
1566   retval = gtk_text_view_scroll_to_iter (text_view,
1567                                          &iter,
1568                                          scroll->within_margin,
1569                                          scroll->use_align,
1570                                          scroll->xalign,
1571                                          scroll->yalign);
1572
1573   free_pending_scroll (scroll);
1574
1575   return retval;
1576 }
1577
1578 static void
1579 gtk_text_view_set_adjustment_upper (GtkAdjustment *adj, gdouble upper)
1580 {
1581   if (upper != adj->upper)
1582     {
1583       gdouble min = MAX (0.0, upper - adj->page_size);
1584       gboolean value_changed = FALSE;
1585
1586       adj->upper = upper;
1587
1588       if (adj->value > min)
1589         {
1590           adj->value = min;
1591           value_changed = TRUE;
1592         }
1593
1594       gtk_signal_emit_by_name (GTK_OBJECT (adj), "changed");
1595       DV(g_print(">Changed adj upper to %g ("G_STRLOC")\n", upper));
1596
1597       if (value_changed)
1598         {
1599           DV(g_print(">Changed adj value because upper decreased ("G_STRLOC")\n"));
1600           gtk_signal_emit_by_name (GTK_OBJECT (adj), "value_changed");
1601         }
1602     }
1603 }
1604
1605 static void
1606 gtk_text_view_update_adjustments (GtkTextView *text_view)
1607 {
1608   gint width = 0, height = 0;
1609
1610   DV(g_print(">Updating adjustments ("G_STRLOC")\n"));
1611
1612   if (text_view->layout)
1613     gtk_text_layout_get_size (text_view->layout, &width, &height);
1614
1615   if (text_view->width != width || text_view->height != height)
1616     {
1617       text_view->width = width;
1618       text_view->height = height;
1619
1620       gtk_text_view_set_adjustment_upper (get_hadjustment (text_view),
1621                                           MAX (SCREEN_WIDTH (text_view), width));
1622       gtk_text_view_set_adjustment_upper (get_vadjustment (text_view),
1623                                           MAX (SCREEN_HEIGHT (text_view), height));
1624
1625       /* hadj/vadj exist since we called get_hadjustment/get_vadjustment above */
1626
1627       /* Set up the step sizes; we'll say that a page is
1628          our allocation minus one step, and a step is
1629          1/10 of our allocation. */
1630       text_view->hadjustment->step_increment =
1631         SCREEN_WIDTH (text_view) / 10.0;
1632       text_view->hadjustment->page_increment =
1633         SCREEN_WIDTH (text_view) * 0.9;
1634
1635       text_view->vadjustment->step_increment =
1636         SCREEN_HEIGHT (text_view) / 10.0;
1637       text_view->vadjustment->page_increment =
1638         SCREEN_HEIGHT (text_view) * 0.9;
1639
1640       gtk_signal_emit_by_name (GTK_OBJECT (get_hadjustment (text_view)), "changed");
1641       gtk_signal_emit_by_name (GTK_OBJECT (get_hadjustment (text_view)), "changed");
1642     }
1643 }
1644
1645 static void
1646 gtk_text_view_update_layout_width (GtkTextView *text_view)
1647 {
1648   DV(g_print(">Updating layout width ("G_STRLOC")\n"));
1649
1650   gtk_text_view_ensure_layout (text_view);
1651
1652   gtk_text_layout_set_screen_width (text_view->layout,
1653                                     SCREEN_WIDTH (text_view));
1654 }
1655
1656 static void
1657 gtk_text_view_update_im_spot_location (GtkTextView *text_view)
1658 {
1659   GdkRectangle area;
1660   gint cursor_x_pos, cursor_y_pos;
1661
1662   if (text_view->layout == NULL)
1663     return;
1664
1665   gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, &cursor_y_pos);
1666
1667   area.x = cursor_x_pos;
1668   area.y = cursor_y_pos;
1669   area.width = area.height = 0;
1670
1671   gtk_im_context_set_cursor_location (text_view->im_context, &area);
1672 }
1673
1674 /**
1675  * gtk_text_view_scroll_to_mark:
1676  * @text_view: a #GtkTextView
1677  * @mark: a #GtkTextMark
1678  * @within_margin: margin as a [0.0,0.5) fraction of screen size
1679  * @use_align: whether to use alignment arguments (if %FALSE, just get the mark onscreen)
1680  * @xalign: horizontal alignment of mark within visible area.
1681  * @yalign: vertical alignment of mark within visible area
1682  *
1683  * Scrolls @text_view so that @mark is on the screen in the position
1684  * indicated by @xalign and @yalign. An alignment of 0.0 indicates
1685  * left or top, 1.0 indicates right or bottom, 0.5 means center. If @use_align
1686  * is %FALSE, the text scrolls the minimal distance to get the mark onscreen,
1687  * possibly not scrolling at all. The effective screen for purposes
1688  * of this function is reduced by a margin of size @within_margin.
1689  *
1690  **/
1691 void
1692 gtk_text_view_scroll_to_mark (GtkTextView *text_view,
1693                               GtkTextMark *mark,
1694                               gdouble      within_margin,
1695                               gboolean     use_align,
1696                               gdouble      xalign,
1697                               gdouble      yalign)
1698 {
1699   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1700   g_return_if_fail (GTK_IS_TEXT_MARK (mark));
1701   g_return_if_fail (within_margin >= 0.0 && within_margin < 0.5);
1702   g_return_if_fail (xalign >= 0.0 && xalign <= 1.0);
1703   g_return_if_fail (yalign >= 0.0 && yalign <= 1.0);
1704
1705   gtk_text_view_queue_scroll (text_view, mark,
1706                               within_margin,
1707                               use_align,
1708                               xalign,
1709                               yalign);
1710
1711   /* If no validation is pending, we need to go ahead and force an
1712    * immediate scroll.
1713    */
1714   if (text_view->layout &&
1715       gtk_text_layout_is_valid (text_view->layout))
1716     gtk_text_view_flush_scroll (text_view);
1717 }
1718
1719 /**
1720  * gtk_text_view_scroll_mark_onscreen:
1721  * @text_view: a #GtkTextView
1722  * @mark: a mark in the buffer for @text_view
1723  *
1724  * Scrolls @text_view the minimum distance such that @mark is contained
1725  * within the visible area of the widget.
1726  *
1727  **/
1728 void
1729 gtk_text_view_scroll_mark_onscreen (GtkTextView *text_view,
1730                                     GtkTextMark *mark)
1731 {
1732   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1733   g_return_if_fail (GTK_IS_TEXT_MARK (mark));
1734
1735   gtk_text_view_scroll_to_mark (text_view, mark, 0.0, FALSE, 0.0, 0.0);
1736 }
1737
1738 static gboolean
1739 clamp_iter_onscreen (GtkTextView *text_view, GtkTextIter *iter)
1740 {
1741   GdkRectangle visible_rect;
1742   gtk_text_view_get_visible_rect (text_view, &visible_rect);
1743
1744   return gtk_text_layout_clamp_iter_to_vrange (text_view->layout, iter,
1745                                                visible_rect.y,
1746                                                visible_rect.y + visible_rect.height);
1747 }
1748
1749 /**
1750  * gtk_text_view_move_mark_onscreen:
1751  * @text_view: a #GtkTextView
1752  * @mark: a #GtkTextMark
1753  *
1754  * Moves a mark within the buffer so that it's
1755  * located within the currently-visible text area.
1756  *
1757  * Return value: %TRUE if the mark moved (wasn't already onscreen)
1758  **/
1759 gboolean
1760 gtk_text_view_move_mark_onscreen (GtkTextView *text_view,
1761                                   GtkTextMark *mark)
1762 {
1763   GtkTextIter iter;
1764
1765   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1766   g_return_val_if_fail (mark != NULL, FALSE);
1767
1768   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
1769
1770   if (clamp_iter_onscreen (text_view, &iter))
1771     {
1772       gtk_text_buffer_move_mark (get_buffer (text_view), mark, &iter);
1773       return TRUE;
1774     }
1775   else
1776     return FALSE;
1777 }
1778
1779 /**
1780  * gtk_text_view_get_visible_rect:
1781  * @text_view: a #GtkTextView
1782  * @visible_rect: rectangle to fill
1783  *
1784  * Fills @visible_rect with the currently-visible
1785  * region of the buffer, in buffer coordinates. Convert to window coordinates
1786  * with gtk_text_view_buffer_to_window_coords().
1787  **/
1788 void
1789 gtk_text_view_get_visible_rect (GtkTextView  *text_view,
1790                                 GdkRectangle *visible_rect)
1791 {
1792   GtkWidget *widget;
1793
1794   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1795
1796   widget = GTK_WIDGET (text_view);
1797
1798   if (visible_rect)
1799     {
1800       visible_rect->x = text_view->xoffset;
1801       visible_rect->y = text_view->yoffset;
1802       visible_rect->width = SCREEN_WIDTH (widget);
1803       visible_rect->height = SCREEN_HEIGHT (widget);
1804
1805       DV(g_print(" visible rect: %d,%d %d x %d\n",
1806                  visible_rect->x,
1807                  visible_rect->y,
1808                  visible_rect->width,
1809                  visible_rect->height));
1810     }
1811 }
1812
1813 /**
1814  * gtk_text_view_set_wrap_mode:
1815  * @text_view: a #GtkTextView
1816  * @wrap_mode: a #GtkWrapMode
1817  *
1818  * Sets the line wrapping for the view.
1819  **/
1820 void
1821 gtk_text_view_set_wrap_mode (GtkTextView *text_view,
1822                              GtkWrapMode  wrap_mode)
1823 {
1824   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1825
1826   if (text_view->wrap_mode != wrap_mode)
1827     {
1828       text_view->wrap_mode = wrap_mode;
1829
1830       if (text_view->layout)
1831         {
1832           text_view->layout->default_style->wrap_mode = wrap_mode;
1833           gtk_text_layout_default_style_changed (text_view->layout);
1834         }
1835     }
1836
1837   g_object_notify (G_OBJECT (text_view), "wrap_mode");
1838 }
1839
1840 /**
1841  * gtk_text_view_get_wrap_mode:
1842  * @text_view: a #GtkTextView
1843  *
1844  * Gets the line wrapping for the view.
1845  *
1846  * Return value: the line wrap setting
1847  **/
1848 GtkWrapMode
1849 gtk_text_view_get_wrap_mode (GtkTextView *text_view)
1850 {
1851   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_WRAP_NONE);
1852
1853   return text_view->wrap_mode;
1854 }
1855
1856 /**
1857  * gtk_text_view_set_editable:
1858  * @text_view: a #GtkTextView
1859  * @setting: whether it's editable
1860  *
1861  * Sets the default editability of the #GtkTextView. You can override
1862  * this default setting with tags in the buffer, using the "editable"
1863  * attribute of tags.
1864  **/
1865 void
1866 gtk_text_view_set_editable (GtkTextView *text_view,
1867                             gboolean     setting)
1868 {
1869   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1870   setting = setting != FALSE;
1871
1872   if (text_view->editable != setting)
1873     {
1874       text_view->editable = setting;
1875
1876       if (text_view->layout)
1877         {
1878           text_view->layout->default_style->editable = text_view->editable;
1879           gtk_text_layout_default_style_changed (text_view->layout);
1880         }
1881
1882       g_object_notify (G_OBJECT (text_view), "editable");
1883     }
1884 }
1885
1886 /**
1887  * gtk_text_view_get_editable:
1888  * @text_view: a #GtkTextView
1889  *
1890  * Returns the default editability of the #GtkTextView. Tags in the
1891  * buffer may override this setting for some ranges of text.
1892  *
1893  * Return value: whether text is editable by default
1894  **/
1895 gboolean
1896 gtk_text_view_get_editable (GtkTextView *text_view)
1897 {
1898   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1899
1900   return text_view->editable;
1901 }
1902
1903 /**
1904  * gtk_text_view_set_pixels_above_lines:
1905  * @text_view: a #GtkTextView
1906  * @pixels_above_lines: pixels above paragraphs
1907  *
1908  * Sets the default number of blank pixels above paragraphs in @text_view.
1909  * Tags in the buffer for @text_view may override the defaults.
1910  *
1911  **/
1912 void
1913 gtk_text_view_set_pixels_above_lines (GtkTextView *text_view,
1914                                       gint         pixels_above_lines)
1915 {
1916   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1917
1918   if (text_view->pixels_above_lines != pixels_above_lines)
1919     {
1920       text_view->pixels_above_lines = pixels_above_lines;
1921
1922       if (text_view->layout)
1923         {
1924           text_view->layout->default_style->pixels_above_lines = pixels_above_lines;
1925           gtk_text_layout_default_style_changed (text_view->layout);
1926         }
1927
1928       g_object_notify (G_OBJECT (text_view), "pixels_above_lines");
1929     }
1930 }
1931
1932 /**
1933  * gtk_text_view_get_pixels_above_lines:
1934  * @text_view: a #GtkTextView
1935  *
1936  * Gets the default number of pixels to put above paragraphs.
1937  *
1938  * Return value: default number of pixels above paragraphs
1939  **/
1940 gint
1941 gtk_text_view_get_pixels_above_lines (GtkTextView *text_view)
1942 {
1943   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1944
1945   return text_view->pixels_above_lines;
1946 }
1947
1948 /**
1949  * gtk_text_view_set_pixels_below_lines:
1950  * @text_view: a #GtkTextView
1951  * @pixels_below_lines: pixels below paragraphs
1952  *
1953  * Sets the default number of pixels of blank space
1954  * to put below paragraphs in @text_view. May be overridden
1955  * by tags applied to @text_view's buffer.
1956  *
1957  **/
1958 void
1959 gtk_text_view_set_pixels_below_lines (GtkTextView *text_view,
1960                                       gint         pixels_below_lines)
1961 {
1962   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1963
1964   if (text_view->pixels_below_lines != pixels_below_lines)
1965     {
1966       text_view->pixels_below_lines = pixels_below_lines;
1967
1968       if (text_view->layout)
1969         {
1970           text_view->layout->default_style->pixels_below_lines = pixels_below_lines;
1971           gtk_text_layout_default_style_changed (text_view->layout);
1972         }
1973
1974       g_object_notify (G_OBJECT (text_view), "pixels_below_lines");
1975     }
1976 }
1977
1978 /**
1979  * gtk_text_view_get_pixels_below_lines:
1980  * @text_view: a #GtkTextView
1981  *
1982  * Gets the value set by gtk_text_view_set_pixels_below_lines().
1983  *
1984  * Return value: default number of blank pixels below paragraphs
1985  **/
1986 gint
1987 gtk_text_view_get_pixels_below_lines (GtkTextView *text_view)
1988 {
1989   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1990
1991   return text_view->pixels_below_lines;
1992 }
1993
1994 /**
1995  * gtk_text_view_set_pixels_inside_wrap:
1996  * @text_view: a #GtkTextView
1997  * @pixels_inside_wrap: default number of pixels between wrapped lines
1998  *
1999  * Sets the default number of pixels of blank space to leave between
2000  * display/wrapped lines within a paragraph. May be overridden by
2001  * tags in @text_view's buffer.
2002  *
2003  **/
2004 void
2005 gtk_text_view_set_pixels_inside_wrap (GtkTextView *text_view,
2006                                       gint         pixels_inside_wrap)
2007 {
2008   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2009
2010   if (text_view->pixels_inside_wrap != pixels_inside_wrap)
2011     {
2012       text_view->pixels_inside_wrap = pixels_inside_wrap;
2013
2014       if (text_view->layout)
2015         {
2016           text_view->layout->default_style->pixels_inside_wrap = pixels_inside_wrap;
2017           gtk_text_layout_default_style_changed (text_view->layout);
2018         }
2019
2020       g_object_notify (G_OBJECT (text_view), "pixels_inside_wrap");
2021     }
2022 }
2023
2024 /**
2025  * gtk_text_view_get_pixels_inside_wrap:
2026  * @text_view: a #GtkTextView
2027  *
2028  * Gets the value set by gtk_text_view_set_pixels_inside_wrap().
2029  *
2030  * Return value: default number of pixels of blank space between wrapped lines
2031  **/
2032 gint
2033 gtk_text_view_get_pixels_inside_wrap (GtkTextView *text_view)
2034 {
2035   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2036
2037   return text_view->pixels_inside_wrap;
2038 }
2039
2040 /**
2041  * gtk_text_view_set_justification:
2042  * @text_view: a #GtkTextView
2043  * @justification: justification
2044  *
2045  * Sets the default justification of text in @text_view.
2046  * Tags in the view's buffer may override the default.
2047  *
2048  **/
2049 void
2050 gtk_text_view_set_justification (GtkTextView     *text_view,
2051                                  GtkJustification justification)
2052 {
2053   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2054
2055   if (text_view->justify != justification)
2056     {
2057       text_view->justify = justification;
2058
2059       if (text_view->layout)
2060         {
2061           text_view->layout->default_style->justification = justification;
2062           gtk_text_layout_default_style_changed (text_view->layout);
2063         }
2064
2065       g_object_notify (G_OBJECT (text_view), "justification");
2066     }
2067 }
2068
2069 /**
2070  * gtk_text_view_get_justification:
2071  * @text_view: a #GtkTextView
2072  *
2073  * Gets the default justification of paragraphs in @text_view.
2074  * Tags in the buffer may override the default.
2075  *
2076  * Return value: default justification
2077  **/
2078 GtkJustification
2079 gtk_text_view_get_justification (GtkTextView *text_view)
2080 {
2081   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_JUSTIFY_LEFT);
2082
2083   return text_view->justify;
2084 }
2085
2086 /**
2087  * gtk_text_view_set_left_margin:
2088  * @text_view: a #GtkTextView
2089  * @left_margin: left margin in pixels
2090  *
2091  * Sets the default left margin for text in @text_view.
2092  * Tags in the buffer may override the default.
2093  *
2094  **/
2095 void
2096 gtk_text_view_set_left_margin (GtkTextView *text_view,
2097                                gint         left_margin)
2098 {
2099   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2100
2101   if (text_view->left_margin != left_margin)
2102     {
2103       text_view->left_margin = left_margin;
2104
2105       if (text_view->layout)
2106         {
2107           text_view->layout->default_style->left_margin = left_margin;
2108           gtk_text_layout_default_style_changed (text_view->layout);
2109         }
2110
2111       g_object_notify (G_OBJECT (text_view), "left_margin");
2112     }
2113 }
2114
2115 /**
2116  * gtk_text_view_get_left_margin:
2117  * @text_view: a #GtkTextView
2118  *
2119  * Gets the default left margin size of paragraphs in the @text_view.
2120  * Tags in the buffer may override the default.
2121  *
2122  * Return value: left margin in pixels
2123  **/
2124 gint
2125 gtk_text_view_get_left_margin (GtkTextView *text_view)
2126 {
2127   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2128
2129   return text_view->left_margin;
2130 }
2131
2132 /**
2133  * gtk_text_view_set_right_margin:
2134  * @text_view: a #GtkTextView
2135  * @right_margin: right margin in pixels
2136  *
2137  * Sets the default right margin for text in the text view.
2138  * Tags in the buffer may override the default.
2139  *
2140  **/
2141 void
2142 gtk_text_view_set_right_margin (GtkTextView *text_view,
2143                                 gint         right_margin)
2144 {
2145   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2146
2147   if (text_view->right_margin != right_margin)
2148     {
2149       text_view->right_margin = right_margin;
2150
2151       if (text_view->layout)
2152         {
2153           text_view->layout->default_style->right_margin = right_margin;
2154           gtk_text_layout_default_style_changed (text_view->layout);
2155         }
2156
2157       g_object_notify (G_OBJECT (text_view), "right_margin");
2158     }
2159 }
2160
2161 /**
2162  * gtk_text_view_get_right_margin:
2163  * @text_view: a #GtkTextView
2164  *
2165  * Gets the default right margin for text in @text_view. Tags
2166  * in the buffer may override the default.
2167  *
2168  * Return value: right margin in pixels
2169  **/
2170 gint
2171 gtk_text_view_get_right_margin (GtkTextView *text_view)
2172 {
2173   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2174
2175   return text_view->right_margin;
2176 }
2177
2178 /**
2179  * gtk_text_view_set_indent:
2180  * @text_view: a #GtkTextView
2181  * @indent: indentation in pixels
2182  *
2183  * Sets the default indentation for paragraphs in @text_view.
2184  * Tags in the buffer may override the default.
2185  *
2186  **/
2187 void
2188 gtk_text_view_set_indent (GtkTextView *text_view,
2189                           gint         indent)
2190 {
2191   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2192
2193   if (text_view->indent != indent)
2194     {
2195       text_view->indent = indent;
2196
2197       if (text_view->layout)
2198         {
2199           text_view->layout->default_style->indent = indent;
2200           gtk_text_layout_default_style_changed (text_view->layout);
2201         }
2202
2203       g_object_notify (G_OBJECT (text_view), "indent");
2204     }
2205 }
2206
2207 /**
2208  * gtk_text_view_get_indent:
2209  * @text_view: a #GtkTextView
2210  *
2211  * Gets the default indentation of paragraphs in @text_view.
2212  * Tags in the view's buffer may override the default.
2213  * The indentation may be negative.
2214  *
2215  * Return value: number of pixels of indentation
2216  **/
2217 gint
2218 gtk_text_view_get_indent (GtkTextView *text_view)
2219 {
2220   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2221
2222   return text_view->indent;
2223 }
2224
2225 /**
2226  * gtk_text_view_set_tabs:
2227  * @text_view: a #GtkTextView
2228  * @tabs: tabs as a #PangoTabArray
2229  *
2230  * Sets the default tab stops for paragraphs in @text_view.
2231  * Tags in the buffer may override the default.
2232  *
2233  **/
2234 void
2235 gtk_text_view_set_tabs (GtkTextView   *text_view,
2236                         PangoTabArray *tabs)
2237 {
2238   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2239
2240   if (text_view->tabs)
2241     pango_tab_array_free (text_view->tabs);
2242
2243   text_view->tabs = tabs ? pango_tab_array_copy (tabs) : NULL;
2244
2245   if (text_view->layout)
2246     {
2247       /* some unkosher futzing in internal struct details... */
2248       if (text_view->layout->default_style->tabs)
2249         pango_tab_array_free (text_view->layout->default_style->tabs);
2250
2251       text_view->layout->default_style->tabs =
2252         text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
2253
2254       gtk_text_layout_default_style_changed (text_view->layout);
2255     }
2256
2257   g_object_notify (G_OBJECT (text_view), "tabs");
2258 }
2259
2260 /**
2261  * gtk_text_view_get_tabs:
2262  * @text_view: a #GtkTextView
2263  *
2264  * Gets the default tabs for @text_view. Tags in the buffer may
2265  * override the defaults. The returned array will be %NULL if
2266  * "standard" (8-space) tabs are used. Free the return value
2267  * with pango_tab_array_free().
2268  *
2269  * Return value: copy of default tab array, or %NULL if "standard" tabs are used; must be freed with pango_tab_array_free().
2270  **/
2271 PangoTabArray*
2272 gtk_text_view_get_tabs (GtkTextView *text_view)
2273 {
2274   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
2275
2276   return text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
2277 }
2278
2279 /**
2280  * gtk_text_view_set_cursor_visible:
2281  * @text_view: a #GtkTextView
2282  * @setting: whether to show the insertion cursor
2283  *
2284  * Toggles whether the insertion point is displayed. A buffer with no editable
2285  * text probably shouldn't have a visible cursor, so you may want to turn
2286  * the cursor off.
2287  **/
2288 void
2289 gtk_text_view_set_cursor_visible    (GtkTextView   *text_view,
2290                                      gboolean       setting)
2291 {
2292   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2293
2294   setting = (setting != FALSE);
2295
2296   if (text_view->cursor_visible != setting)
2297     {
2298       text_view->cursor_visible = setting;
2299
2300       if (GTK_WIDGET_HAS_FOCUS (text_view))
2301         {
2302           if (text_view->layout)
2303             {
2304               gtk_text_layout_set_cursor_visible (text_view->layout, setting);
2305               gtk_text_view_check_cursor_blink (text_view);
2306             }
2307         }
2308
2309       g_object_notify (G_OBJECT (text_view), "cursor_visible");
2310     }
2311 }
2312
2313 /**
2314  * gtk_text_view_get_cursor_visible:
2315  * @text_view: a #GtkTextView
2316  *
2317  * Find out whether the cursor is being displayed.
2318  *
2319  * Return value: whether the insertion mark is visible
2320  **/
2321 gboolean
2322 gtk_text_view_get_cursor_visible    (GtkTextView   *text_view)
2323 {
2324   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
2325
2326   return text_view->cursor_visible;
2327 }
2328
2329
2330 /**
2331  * gtk_text_view_place_cursor_onscreen:
2332  * @text_view: a #GtkTextView
2333  *
2334  * Moves the cursor to the currently visible region of the
2335  * buffer, it it isn't there already.
2336  *
2337  * Return value: TRUE if the cursor had to be moved.
2338  **/
2339 gboolean
2340 gtk_text_view_place_cursor_onscreen (GtkTextView *text_view)
2341 {
2342   GtkTextIter insert;
2343
2344   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
2345
2346   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
2347                                     gtk_text_buffer_get_mark (get_buffer (text_view),
2348                                                               "insert"));
2349
2350   if (clamp_iter_onscreen (text_view, &insert))
2351     {
2352       gtk_text_buffer_place_cursor (get_buffer (text_view), &insert);
2353       return TRUE;
2354     }
2355   else
2356     return FALSE;
2357 }
2358
2359 static void
2360 gtk_text_view_remove_validate_idles (GtkTextView *text_view)
2361 {
2362   if (text_view->first_validate_idle != 0)
2363     {
2364       DV (g_print ("Removing first validate idle: %s\n", G_STRLOC));
2365       g_source_remove (text_view->first_validate_idle);
2366       text_view->first_validate_idle = 0;
2367     }
2368
2369   if (text_view->incremental_validate_idle != 0)
2370     {
2371       g_source_remove (text_view->incremental_validate_idle);
2372       text_view->incremental_validate_idle = 0;
2373     }
2374 }
2375
2376 static void
2377 gtk_text_view_destroy (GtkObject *object)
2378 {
2379   GtkTextView *text_view;
2380   GtkTextLayout *layout;
2381
2382   text_view = GTK_TEXT_VIEW (object);
2383
2384   layout = text_view->layout;
2385
2386   gtk_text_view_remove_validate_idles (text_view);
2387   gtk_text_view_set_buffer (text_view, NULL);
2388   gtk_text_view_destroy_layout (text_view);
2389
2390   (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
2391 }
2392
2393 static void
2394 gtk_text_view_finalize (GObject *object)
2395 {
2396   GtkTextView *text_view;
2397
2398   text_view = GTK_TEXT_VIEW (object);
2399
2400   g_return_if_fail (text_view->buffer == NULL);
2401
2402   gtk_text_view_destroy_layout (text_view);
2403   gtk_text_view_set_buffer (text_view, NULL);
2404
2405   if (text_view->pending_scroll)
2406     {
2407       free_pending_scroll (text_view->pending_scroll);
2408       text_view->pending_scroll = NULL;
2409     }
2410
2411   if (text_view->tabs)
2412     pango_tab_array_free (text_view->tabs);
2413
2414   if (text_view->hadjustment)
2415     g_object_unref (G_OBJECT (text_view->hadjustment));
2416   if (text_view->vadjustment)
2417     g_object_unref (G_OBJECT (text_view->vadjustment));
2418
2419   text_window_free (text_view->text_window);
2420
2421   if (text_view->left_window)
2422     text_window_free (text_view->left_window);
2423
2424   if (text_view->top_window)
2425     text_window_free (text_view->top_window);
2426
2427   if (text_view->right_window)
2428     text_window_free (text_view->right_window);
2429
2430   if (text_view->bottom_window)
2431     text_window_free (text_view->bottom_window);
2432
2433   g_object_unref (G_OBJECT (text_view->im_context));
2434
2435   (* G_OBJECT_CLASS (parent_class)->finalize) (object);
2436 }
2437
2438 static void
2439 gtk_text_view_set_property (GObject         *object,
2440                             guint            prop_id,
2441                             const GValue    *value,
2442                             GParamSpec      *pspec)
2443 {
2444   GtkTextView *text_view;
2445
2446   text_view = GTK_TEXT_VIEW (object);
2447
2448   switch (prop_id)
2449     {
2450     case PROP_PIXELS_ABOVE_LINES:
2451       gtk_text_view_set_pixels_above_lines (text_view, g_value_get_int (value));
2452       break;
2453
2454     case PROP_PIXELS_BELOW_LINES:
2455       gtk_text_view_set_pixels_below_lines (text_view, g_value_get_int (value));
2456       break;
2457
2458     case PROP_PIXELS_INSIDE_WRAP:
2459       gtk_text_view_set_pixels_inside_wrap (text_view, g_value_get_int (value));
2460       break;
2461
2462     case PROP_EDITABLE:
2463       gtk_text_view_set_editable (text_view, g_value_get_boolean (value));
2464       break;
2465
2466     case PROP_WRAP_MODE:
2467       gtk_text_view_set_wrap_mode (text_view, g_value_get_enum (value));
2468       break;
2469
2470     case PROP_JUSTIFICATION:
2471       gtk_text_view_set_justification (text_view, g_value_get_enum (value));
2472       break;
2473
2474     case PROP_LEFT_MARGIN:
2475       gtk_text_view_set_left_margin (text_view, g_value_get_int (value));
2476       break;
2477
2478     case PROP_RIGHT_MARGIN:
2479       gtk_text_view_set_right_margin (text_view, g_value_get_int (value));
2480       break;
2481
2482     case PROP_INDENT:
2483       gtk_text_view_set_indent (text_view, g_value_get_int (value));
2484       break;
2485
2486     case PROP_TABS:
2487       gtk_text_view_set_tabs (text_view, g_value_get_boxed (value));
2488       break;
2489
2490     case PROP_CURSOR_VISIBLE:
2491       gtk_text_view_set_cursor_visible (text_view, g_value_get_boolean (value));
2492       break;
2493
2494     default:
2495       g_assert_not_reached ();
2496       break;
2497     }
2498 }
2499
2500 static void
2501 gtk_text_view_get_property (GObject         *object,
2502                             guint            prop_id,
2503                             GValue          *value,
2504                             GParamSpec      *pspec)
2505 {
2506   GtkTextView *text_view;
2507
2508   text_view = GTK_TEXT_VIEW (object);
2509
2510   switch (prop_id)
2511     {
2512     case PROP_PIXELS_ABOVE_LINES:
2513       g_value_set_int (value, text_view->pixels_above_lines);
2514       break;
2515
2516     case PROP_PIXELS_BELOW_LINES:
2517       g_value_set_int (value, text_view->pixels_below_lines);
2518       break;
2519
2520     case PROP_PIXELS_INSIDE_WRAP:
2521       g_value_set_int (value, text_view->pixels_inside_wrap);
2522       break;
2523
2524     case PROP_EDITABLE:
2525       g_value_set_boolean (value, text_view->editable);
2526       break;
2527
2528     case PROP_WRAP_MODE:
2529       g_value_set_enum (value, text_view->wrap_mode);
2530       break;
2531
2532     case PROP_JUSTIFICATION:
2533       g_value_set_enum (value, text_view->justify);
2534       break;
2535
2536     case PROP_LEFT_MARGIN:
2537       g_value_set_int (value, text_view->left_margin);
2538       break;
2539
2540     case PROP_RIGHT_MARGIN:
2541       g_value_set_int (value, text_view->right_margin);
2542       break;
2543
2544     case PROP_INDENT:
2545       g_value_set_int (value, text_view->indent);
2546       break;
2547
2548     case PROP_TABS:
2549       g_value_set_boxed (value, text_view->tabs);
2550       break;
2551
2552     case PROP_CURSOR_VISIBLE:
2553       g_value_set_boolean (value, text_view->cursor_visible);
2554       break;
2555
2556     default:
2557       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2558       break;
2559     }
2560 }
2561
2562 static void
2563 gtk_text_view_size_request (GtkWidget      *widget,
2564                             GtkRequisition *requisition)
2565 {
2566   GtkTextView *text_view;
2567   GSList *tmp_list;
2568   gint focus_edge_width;
2569   gint focus_width;
2570   gboolean interior_focus;
2571
2572   text_view = GTK_TEXT_VIEW (widget);
2573
2574   gtk_widget_style_get (widget,
2575                         "interior_focus", &interior_focus,
2576                         "focus_line_width", &focus_width,
2577                         NULL);
2578
2579   if (interior_focus)
2580     focus_edge_width = 0;
2581   else
2582     focus_edge_width = focus_width;
2583
2584   if (text_view->layout)
2585     {
2586       text_view->text_window->requisition.width = text_view->layout->width;
2587       text_view->text_window->requisition.height = text_view->layout->height;
2588     }
2589   else
2590     {
2591       text_view->text_window->requisition.width = 0;
2592       text_view->text_window->requisition.height = 0;
2593     }
2594
2595   requisition->width = text_view->text_window->requisition.width + focus_edge_width * 2;
2596   requisition->height = text_view->text_window->requisition.height + focus_edge_width * 2;
2597
2598   if (text_view->left_window)
2599     requisition->width += text_view->left_window->requisition.width;
2600
2601   if (text_view->right_window)
2602     requisition->width += text_view->right_window->requisition.width;
2603
2604   if (text_view->top_window)
2605     requisition->height += text_view->top_window->requisition.height;
2606
2607   if (text_view->bottom_window)
2608     requisition->height += text_view->bottom_window->requisition.height;
2609
2610   requisition->width += GTK_CONTAINER (text_view)->border_width * 2;
2611   requisition->height += GTK_CONTAINER (text_view)->border_width * 2;
2612
2613   tmp_list = text_view->children;
2614   while (tmp_list != NULL)
2615     {
2616       GtkTextViewChild *child = tmp_list->data;
2617
2618       if (child->anchor)
2619         {
2620           GtkRequisition child_req;
2621           GtkRequisition old_req;
2622
2623           gtk_widget_get_child_requisition (child->widget, &old_req);
2624
2625           gtk_widget_size_request (child->widget, &child_req);
2626
2627           gtk_widget_get_child_requisition (child->widget, &child_req);
2628
2629           /* Invalidate layout lines if required */
2630           if (text_view->layout &&
2631               (old_req.width != child_req.width ||
2632                old_req.height != child_req.height))
2633             gtk_text_child_anchor_queue_resize (child->anchor,
2634                                                 text_view->layout);
2635         }
2636       else
2637         {
2638           GtkRequisition child_req;
2639
2640           gtk_widget_size_request (child->widget, &child_req);
2641         }
2642
2643       tmp_list = g_slist_next (tmp_list);
2644     }
2645 }
2646
2647 static void
2648 gtk_text_view_compute_child_allocation (GtkTextView      *text_view,
2649                                         GtkTextViewChild *vc,
2650                                         GtkAllocation    *allocation)
2651 {
2652   gint buffer_y;
2653   GtkTextIter iter;
2654   GtkRequisition req;
2655
2656   gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
2657                                             &iter,
2658                                             vc->anchor);
2659
2660   gtk_text_layout_get_line_yrange (text_view->layout, &iter,
2661                                    &buffer_y, NULL);
2662
2663   buffer_y += vc->from_top_of_line;
2664
2665   allocation->x = vc->from_left_of_buffer - text_view->xoffset;
2666   allocation->y = buffer_y - text_view->yoffset;
2667
2668   gtk_widget_get_child_requisition (vc->widget, &req);
2669   allocation->width = req.width;
2670   allocation->height = req.height;
2671 }
2672
2673 static void
2674 gtk_text_view_update_child_allocation (GtkTextView      *text_view,
2675                                        GtkTextViewChild *vc)
2676 {
2677   GtkAllocation allocation;
2678
2679   gtk_text_view_compute_child_allocation (text_view, vc, &allocation);
2680
2681   gtk_widget_size_allocate (vc->widget, &allocation);
2682
2683 #if 0
2684   g_print ("allocation for %p allocated to %d,%d yoffset = %d\n",
2685            vc->widget,
2686            vc->widget->allocation.x,
2687            vc->widget->allocation.y,
2688            text_view->yoffset);
2689 #endif
2690 }
2691
2692 static void
2693 gtk_text_view_child_allocated (GtkTextLayout *layout,
2694                                GtkWidget     *child,
2695                                gint           x,
2696                                gint           y,
2697                                gpointer       data)
2698 {
2699   GtkTextViewChild *vc = NULL;
2700   GtkTextView *text_view = data;
2701
2702   /* x,y is the position of the child from the top of the line, and
2703    * from the left of the buffer. We have to translate that into text
2704    * window coordinates, then size_allocate the child.
2705    */
2706
2707   vc = g_object_get_data (G_OBJECT (child),
2708                           "gtk-text-view-child");
2709
2710   g_assert (vc != NULL);
2711
2712   DV (g_print ("child allocated at %d,%d\n", x, y));
2713
2714   vc->from_left_of_buffer = x;
2715   vc->from_top_of_line = y;
2716
2717   gtk_text_view_update_child_allocation (text_view, vc);
2718 }
2719
2720 static void
2721 gtk_text_view_allocate_children (GtkTextView *text_view)
2722 {
2723   GSList *tmp_list;
2724
2725   DV(g_print(G_STRLOC"\n"));
2726
2727   tmp_list = text_view->children;
2728   while (tmp_list != NULL)
2729     {
2730       GtkTextViewChild *child = tmp_list->data;
2731
2732       if (child->anchor)
2733         {
2734           /* We need to force-validate the regions containing
2735            * children.
2736            */
2737           GtkTextIter child_loc;
2738           gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
2739                                                     &child_loc,
2740                                                     child->anchor);
2741
2742           gtk_text_layout_validate_yrange (text_view->layout,
2743                                            &child_loc,
2744                                            0, 1);
2745         }
2746       else
2747         {
2748           GtkAllocation allocation;
2749           GtkRequisition child_req;
2750
2751           g_assert (child != NULL);
2752
2753           allocation.x = child->x;
2754           allocation.y = child->y;
2755
2756           gtk_widget_get_child_requisition (child->widget, &child_req);
2757
2758           allocation.width = child_req.width;
2759           allocation.height = child_req.height;
2760
2761           gtk_widget_size_allocate (child->widget, &allocation);
2762         }
2763
2764       tmp_list = g_slist_next (tmp_list);
2765     }
2766 }
2767
2768 static void
2769 gtk_text_view_size_allocate (GtkWidget *widget,
2770                              GtkAllocation *allocation)
2771 {
2772   GtkTextView *text_view;
2773   GtkTextIter first_para;
2774   gint y;
2775   GtkAdjustment *vadj;
2776   gboolean yoffset_changed = FALSE;
2777   gint width, height;
2778   GdkRectangle text_rect;
2779   GdkRectangle left_rect;
2780   GdkRectangle right_rect;
2781   GdkRectangle top_rect;
2782   GdkRectangle bottom_rect;
2783   gint focus_edge_width;
2784   gint focus_width;
2785   gboolean interior_focus;
2786   gboolean size_changed;
2787
2788   text_view = GTK_TEXT_VIEW (widget);
2789
2790   DV(g_print(G_STRLOC"\n"));
2791
2792   size_changed =
2793     widget->allocation.width != allocation->width ||
2794     widget->allocation.height != allocation->height;
2795
2796   widget->allocation = *allocation;
2797
2798   if (GTK_WIDGET_REALIZED (widget))
2799     {
2800       gdk_window_move_resize (widget->window,
2801                               allocation->x, allocation->y,
2802                               allocation->width, allocation->height);
2803     }
2804
2805   /* distribute width/height among child windows. Ensure all
2806    * windows get at least a 1x1 allocation.
2807    */
2808
2809   gtk_widget_style_get (widget,
2810                         "interior_focus", &interior_focus,
2811                         "focus_line_width", &focus_width,
2812                         NULL);
2813
2814   if (interior_focus)
2815     focus_edge_width = 0;
2816   else
2817     focus_edge_width = focus_width;
2818
2819   width = allocation->width - focus_edge_width * 2 - GTK_CONTAINER (text_view)->border_width * 2;
2820
2821   if (text_view->left_window)
2822     left_rect.width = text_view->left_window->requisition.width;
2823   else
2824     left_rect.width = 0;
2825
2826   width -= left_rect.width;
2827
2828   if (text_view->right_window)
2829     right_rect.width = text_view->right_window->requisition.width;
2830   else
2831     right_rect.width = 0;
2832
2833   width -= right_rect.width;
2834
2835   text_rect.width = MAX (1, width);
2836
2837   top_rect.width = text_rect.width;
2838   bottom_rect.width = text_rect.width;
2839
2840
2841   height = allocation->height - focus_edge_width * 2 - GTK_CONTAINER (text_view)->border_width * 2;
2842
2843   if (text_view->top_window)
2844     top_rect.height = text_view->top_window->requisition.height;
2845   else
2846     top_rect.height = 0;
2847
2848   height -= top_rect.height;
2849
2850   if (text_view->bottom_window)
2851     bottom_rect.height = text_view->bottom_window->requisition.height;
2852   else
2853     bottom_rect.height = 0;
2854
2855   height -= bottom_rect.height;
2856
2857   text_rect.height = MAX (1, height);
2858
2859   left_rect.height = text_rect.height;
2860   right_rect.height = text_rect.height;
2861
2862   /* Origins */
2863   left_rect.x = focus_edge_width + GTK_CONTAINER (text_view)->border_width;
2864   top_rect.y = focus_edge_width + GTK_CONTAINER (text_view)->border_width;
2865
2866   text_rect.x = left_rect.x + left_rect.width;
2867   text_rect.y = top_rect.y + top_rect.height;
2868
2869   left_rect.y = text_rect.y;
2870   right_rect.y = text_rect.y;
2871
2872   top_rect.x = text_rect.x;
2873   bottom_rect.x = text_rect.x;
2874
2875   right_rect.x = text_rect.x + text_rect.width;
2876   bottom_rect.y = text_rect.y + text_rect.height;
2877
2878   text_window_size_allocate (text_view->text_window,
2879                              &text_rect);
2880
2881   if (text_view->left_window)
2882     text_window_size_allocate (text_view->left_window,
2883                                &left_rect);
2884
2885   if (text_view->right_window)
2886     text_window_size_allocate (text_view->right_window,
2887                                &right_rect);
2888
2889   if (text_view->top_window)
2890     text_window_size_allocate (text_view->top_window,
2891                                &top_rect);
2892
2893   if (text_view->bottom_window)
2894     text_window_size_allocate (text_view->bottom_window,
2895                                &bottom_rect);
2896
2897   gtk_text_view_update_layout_width (text_view);
2898
2899   /* Note that this will do some layout validation */
2900   gtk_text_view_allocate_children (text_view);
2901
2902   /* Now adjust the value of the adjustment to keep the cursor at the
2903    * same place in the buffer
2904    */
2905   gtk_text_view_get_first_para_iter (text_view, &first_para);
2906   gtk_text_layout_get_line_yrange (text_view->layout, &first_para, &y, NULL);
2907
2908   y += text_view->first_para_pixels;
2909
2910   /* Ensure h/v adj exist */
2911   get_hadjustment (text_view);
2912   get_vadjustment (text_view);
2913
2914   vadj = text_view->vadjustment;
2915   if (y > vadj->upper - vadj->page_size)
2916     y = MAX (0, vadj->upper - vadj->page_size);
2917
2918   if (y != text_view->yoffset)
2919     {
2920       vadj->value = text_view->yoffset = y;
2921       yoffset_changed = TRUE;
2922     }
2923
2924   text_view->hadjustment->page_size = SCREEN_WIDTH (text_view);
2925   text_view->hadjustment->page_increment = SCREEN_WIDTH (text_view) * 0.9;
2926   text_view->hadjustment->step_increment = SCREEN_WIDTH (text_view) * 0.1;
2927   text_view->hadjustment->lower = 0;
2928   text_view->hadjustment->upper = MAX (SCREEN_WIDTH (text_view),
2929                                        text_view->width);
2930   gtk_signal_emit_by_name (GTK_OBJECT (text_view->hadjustment), "changed");
2931
2932   text_view->vadjustment->page_size = SCREEN_HEIGHT (text_view);
2933   text_view->vadjustment->page_increment = SCREEN_HEIGHT (text_view) * 0.9;
2934   text_view->vadjustment->step_increment = SCREEN_HEIGHT (text_view) * 0.1;
2935   text_view->vadjustment->lower = 0;
2936   text_view->vadjustment->upper = MAX (SCREEN_HEIGHT (text_view),
2937                                        text_view->height);
2938   gtk_signal_emit_by_name (GTK_OBJECT (text_view->vadjustment), "changed");
2939
2940   if (yoffset_changed)
2941     gtk_adjustment_value_changed (vadj);
2942
2943   /* The GTK resize loop processes all the pending exposes right
2944    * after doing the resize stuff, so the idle sizer won't have a
2945    * chance to run. So we do the work here.
2946    */
2947   gtk_text_view_flush_first_validate (text_view);
2948
2949   /* widget->window doesn't get auto-redrawn as the layout is computed, so has to
2950    * be invalidated
2951    */
2952   if (size_changed && GTK_WIDGET_REALIZED (widget))
2953     gdk_window_invalidate_rect (widget->window, NULL, FALSE);
2954 }
2955
2956 static void
2957 gtk_text_view_get_first_para_iter (GtkTextView *text_view,
2958                                    GtkTextIter *iter)
2959 {
2960   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), iter,
2961                                     text_view->first_para_mark);
2962 }
2963
2964 static void
2965 gtk_text_view_validate_onscreen (GtkTextView *text_view)
2966 {
2967   GtkWidget *widget = GTK_WIDGET (text_view);
2968
2969   DV(g_print(">Validating onscreen ("G_STRLOC")\n"));
2970
2971   if (SCREEN_HEIGHT (widget) > 0)
2972     {
2973       GtkTextIter first_para;
2974
2975       /* Be sure we've validated the stuff onscreen; if we
2976        * scrolled, these calls won't have any effect, because
2977        * they were called in the recursive validate_onscreen
2978        */
2979       gtk_text_view_get_first_para_iter (text_view, &first_para);
2980
2981       gtk_text_layout_validate_yrange (text_view->layout,
2982                                        &first_para,
2983                                        0,
2984                                        text_view->first_para_pixels +
2985                                        SCREEN_HEIGHT (widget));
2986     }
2987
2988   text_view->onscreen_validated = TRUE;
2989
2990   DV(g_print(">Done validating onscreen, onscreen_validated = TRUE ("G_STRLOC")\n"));
2991
2992   /* This can have the odd side effect of triggering a scroll, which should
2993    * flip "onscreen_validated" back to FALSE, but should also get us
2994    * back into this function to turn it on again.
2995    */
2996   gtk_text_view_update_adjustments (text_view);
2997
2998   g_assert (text_view->onscreen_validated);
2999 }
3000
3001 static void
3002 gtk_text_view_flush_first_validate (GtkTextView *text_view)
3003 {
3004   if (text_view->first_validate_idle == 0)
3005     return;
3006
3007   /* Do this first, which means that if an "invalidate"
3008    * occurs during any of this process, a new first_validate_callback
3009    * will be installed, and we'll start again.
3010    */
3011   DV (g_print ("removing first validate in %s\n", G_STRLOC));
3012   g_source_remove (text_view->first_validate_idle);
3013   text_view->first_validate_idle = 0;
3014
3015   /* be sure we have up-to-date screen size set on the
3016    * layout.
3017    */
3018   gtk_text_view_update_layout_width (text_view);
3019
3020   /* Bail out if we invalidated stuff; scrolling right away will just
3021    * confuse the issue.
3022    */
3023   if (text_view->first_validate_idle != 0)
3024     {
3025       DV(g_print(">Width change forced requeue ("G_STRLOC")\n"));
3026     }
3027   else
3028     {
3029       /* scroll to any marks, if that's pending. This can
3030        * jump us to the validation codepath used for scrolling
3031        * onscreen, if so we bail out.
3032        */
3033       if (!gtk_text_view_flush_scroll (text_view))
3034         gtk_text_view_validate_onscreen (text_view);
3035
3036       DV(g_print(">Leaving first validate idle ("G_STRLOC")\n"));
3037
3038       g_assert (text_view->onscreen_validated);
3039     }
3040 }
3041
3042 static gboolean
3043 first_validate_callback (gpointer data)
3044 {
3045   GtkTextView *text_view = data;
3046
3047   GDK_THREADS_ENTER ();
3048
3049   /* Note that some of this code is duplicated at the end of size_allocate,
3050    * keep in sync with that.
3051    */
3052
3053   DV(g_print(G_STRLOC"\n"));
3054
3055   gtk_text_view_flush_first_validate (text_view);
3056
3057   GDK_THREADS_LEAVE ();
3058
3059   return FALSE;
3060 }
3061
3062 static gboolean
3063 incremental_validate_callback (gpointer data)
3064 {
3065   GtkTextView *text_view = data;
3066   gboolean result = TRUE;
3067
3068   GDK_THREADS_ENTER ();
3069
3070   DV(g_print(G_STRLOC"\n"));
3071
3072   gtk_text_layout_validate (text_view->layout, 2000);
3073
3074   gtk_text_view_update_adjustments (text_view);
3075
3076   if (gtk_text_layout_is_valid (text_view->layout))
3077     {
3078       text_view->incremental_validate_idle = 0;
3079       result = FALSE;
3080     }
3081
3082   GDK_THREADS_LEAVE ();
3083
3084   return result;
3085 }
3086
3087 static void
3088 gtk_text_view_invalidate (GtkTextView *text_view)
3089 {
3090   DV (g_print (">Invalidate, onscreen_validated = %d now FALSE ("G_STRLOC")\n",
3091                text_view->onscreen_validated));
3092
3093   text_view->onscreen_validated = FALSE;
3094
3095   if (!text_view->first_validate_idle)
3096     {
3097       text_view->first_validate_idle = g_idle_add_full (GTK_PRIORITY_RESIZE - 2, first_validate_callback, text_view, NULL);
3098       DV (g_print (G_STRLOC": adding first validate idle %d\n",
3099                    text_view->first_validate_idle));
3100     }
3101
3102   if (!text_view->incremental_validate_idle)
3103     {
3104       text_view->incremental_validate_idle = g_idle_add_full (GTK_TEXT_VIEW_PRIORITY_VALIDATE, incremental_validate_callback, text_view, NULL);
3105       DV (g_print (G_STRLOC": adding incremental validate idle %d\n",
3106                    text_view->incremental_validate_idle));
3107     }
3108 }
3109
3110 static void
3111 invalidated_handler (GtkTextLayout *layout,
3112                      gpointer       data)
3113 {
3114   GtkTextView *text_view;
3115
3116   text_view = GTK_TEXT_VIEW (data);
3117
3118   DV (g_print ("Invalidating due to layout invalidate signal\n"));
3119   gtk_text_view_invalidate (text_view);
3120 }
3121
3122 static void
3123 changed_handler (GtkTextLayout     *layout,
3124                  gint               start_y,
3125                  gint               old_height,
3126                  gint               new_height,
3127                  gpointer           data)
3128 {
3129   GtkTextView *text_view;
3130   GtkWidget *widget;
3131   GdkRectangle visible_rect;
3132   GdkRectangle redraw_rect;
3133
3134   text_view = GTK_TEXT_VIEW (data);
3135   widget = GTK_WIDGET (data);
3136
3137   DV(g_print(">Lines Validated ("G_STRLOC")\n"));
3138
3139   if (GTK_WIDGET_REALIZED (text_view))
3140     {
3141       gtk_text_view_get_visible_rect (text_view, &visible_rect);
3142
3143       redraw_rect.x = visible_rect.x;
3144       redraw_rect.width = visible_rect.width;
3145       redraw_rect.y = start_y;
3146
3147       if (old_height == new_height)
3148         redraw_rect.height = old_height;
3149       else
3150         redraw_rect.height = MAX (0, visible_rect.y + visible_rect.height - start_y);
3151
3152       if (gdk_rectangle_intersect (&redraw_rect, &visible_rect, &redraw_rect))
3153         {
3154           /* text_window_invalidate_rect() takes buffer coordinates */
3155           text_window_invalidate_rect (text_view->text_window,
3156                                        &redraw_rect);
3157
3158           DV(g_print(" invalidated rect: %d,%d %d x %d\n",
3159                      redraw_rect.x,
3160                      redraw_rect.y,
3161                      redraw_rect.width,
3162                      redraw_rect.height));
3163
3164           if (text_view->left_window)
3165             text_window_invalidate_rect (text_view->left_window,
3166                                          &redraw_rect);
3167           if (text_view->right_window)
3168             text_window_invalidate_rect (text_view->right_window,
3169                                          &redraw_rect);
3170           if (text_view->top_window)
3171             text_window_invalidate_rect (text_view->top_window,
3172                                          &redraw_rect);
3173           if (text_view->bottom_window)
3174             text_window_invalidate_rect (text_view->bottom_window,
3175                                          &redraw_rect);
3176
3177           gtk_text_view_update_im_spot_location (text_view);
3178         }
3179     }
3180
3181   if (old_height != new_height)
3182     {
3183       gboolean yoffset_changed = FALSE;
3184       GSList *tmp_list;
3185       int new_first_para_top;
3186       int old_first_para_top;
3187       GtkTextIter first;
3188
3189       /* If the bottom of the old area was above the top of the
3190        * screen, we need to scroll to keep the current top of the
3191        * screen in place.  Remember that first_para_pixels is the
3192        * position of the top of the screen in coordinates relative to
3193        * the first paragraph onscreen.
3194        *
3195        * In short we are adding the height delta of the portion of the
3196        * changed region above first_para_mark to text_view->yoffset.
3197        */
3198       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &first,
3199                                         text_view->first_para_mark);
3200
3201       gtk_text_layout_get_line_yrange (layout, &first, &new_first_para_top, NULL);
3202
3203       old_first_para_top = text_view->yoffset - text_view->first_para_pixels;
3204
3205       if (new_first_para_top != old_first_para_top)
3206         {
3207           text_view->yoffset += new_first_para_top - old_first_para_top;
3208
3209           get_vadjustment (text_view)->value = text_view->yoffset;
3210           yoffset_changed = TRUE;
3211         }
3212
3213       if (yoffset_changed)
3214         {
3215           DV(g_print ("Changing scroll position (%s)\n", G_STRLOC));
3216           gtk_adjustment_value_changed (get_vadjustment (text_view));
3217         }
3218
3219       /* FIXME be smarter about which anchored widgets we update */
3220
3221       tmp_list = text_view->children;
3222       while (tmp_list != NULL)
3223         {
3224           GtkTextViewChild *child = tmp_list->data;
3225
3226           if (child->anchor)
3227             gtk_text_view_update_child_allocation (text_view, child);
3228
3229           tmp_list = g_slist_next (tmp_list);
3230         }
3231     }
3232
3233   {
3234     GtkRequisition old_req;
3235     GtkRequisition new_req;
3236
3237     old_req = widget->requisition;
3238
3239     /* Use this instead of gtk_widget_size_request wrapper
3240      * to avoid the optimization which just returns widget->requisition
3241      * if a resize hasn't been queued.
3242      */
3243     GTK_WIDGET_GET_CLASS (widget)->size_request (widget, &new_req);
3244
3245     if (old_req.width != new_req.width ||
3246         old_req.height != new_req.height)
3247       {
3248         /* FIXME http://bugzilla.gnome.org/show_bug.cgi?id=72258 */
3249         _gtk_size_group_queue_resize (widget);
3250       }
3251   }
3252 }
3253
3254 static void
3255 gtk_text_view_realize_cursor_gc (GtkTextView *text_view)
3256 {
3257   GdkColor *cursor_color;
3258   GdkColor red = { 0, 0xffff, 0x0000, 0x0000 };
3259
3260   if (text_view->cursor_gc)
3261     gdk_gc_unref (text_view->cursor_gc);
3262
3263   gtk_widget_style_get (GTK_WIDGET (text_view), "cursor-color", &cursor_color, NULL);
3264
3265   if (!cursor_color)
3266     cursor_color = &red;
3267
3268   text_view->cursor_gc = gdk_gc_new (text_view->text_window->bin_window);
3269   gdk_gc_set_rgb_fg_color (text_view->cursor_gc, cursor_color);
3270 }
3271
3272 static void
3273 gtk_text_view_realize (GtkWidget *widget)
3274 {
3275   GtkTextView *text_view;
3276   GdkWindowAttr attributes;
3277   gint attributes_mask;
3278   GSList *tmp_list;
3279
3280   text_view = GTK_TEXT_VIEW (widget);
3281   GTK_WIDGET_SET_FLAGS (text_view, GTK_REALIZED);
3282
3283   attributes.window_type = GDK_WINDOW_CHILD;
3284   attributes.x = widget->allocation.x;
3285   attributes.y = widget->allocation.y;
3286   attributes.width = widget->allocation.width;
3287   attributes.height = widget->allocation.height;
3288   attributes.wclass = GDK_INPUT_OUTPUT;
3289   attributes.visual = gtk_widget_get_visual (widget);
3290   attributes.colormap = gtk_widget_get_colormap (widget);
3291   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK | GDK_EXPOSURE_MASK;
3292
3293   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
3294
3295   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
3296                                    &attributes, attributes_mask);
3297   gdk_window_set_user_data (widget->window, widget);
3298
3299   /* must come before text_window_realize calls */
3300   widget->style = gtk_style_attach (widget->style, widget->window);
3301
3302   gdk_window_set_background (widget->window,
3303                              &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3304
3305   text_window_realize (text_view->text_window, widget->window);
3306
3307   if (text_view->left_window)
3308     text_window_realize (text_view->left_window,
3309                          widget->window);
3310
3311   if (text_view->top_window)
3312     text_window_realize (text_view->top_window,
3313                          widget->window);
3314
3315   if (text_view->right_window)
3316     text_window_realize (text_view->right_window,
3317                          widget->window);
3318
3319   if (text_view->bottom_window)
3320     text_window_realize (text_view->bottom_window,
3321                          widget->window);
3322
3323   gtk_text_view_realize_cursor_gc (text_view);
3324
3325   gtk_text_view_ensure_layout (text_view);
3326
3327   if (text_view->buffer)
3328     gtk_text_buffer_add_selection_clipboard (text_view->buffer,
3329                                              gtk_clipboard_get (GDK_SELECTION_PRIMARY));
3330
3331   tmp_list = text_view->children;
3332   while (tmp_list != NULL)
3333     {
3334       GtkTextViewChild *vc = tmp_list->data;
3335
3336       text_view_child_set_parent_window (text_view, vc);
3337
3338       tmp_list = tmp_list->next;
3339     }
3340 }
3341
3342 static void
3343 gtk_text_view_unrealize (GtkWidget *widget)
3344 {
3345   GtkTextView *text_view;
3346
3347   text_view = GTK_TEXT_VIEW (widget);
3348
3349   if (text_view->buffer)
3350     gtk_text_buffer_remove_selection_clipboard (text_view->buffer,
3351                                                 gtk_clipboard_get (GDK_SELECTION_PRIMARY));
3352
3353   if (text_view->cursor_gc)
3354     {
3355       gdk_gc_unref (text_view->cursor_gc);
3356       text_view->cursor_gc = NULL;
3357     }
3358
3359   gtk_text_view_remove_validate_idles (text_view);
3360
3361   if (text_view->popup_menu)
3362     {
3363       gtk_widget_destroy (text_view->popup_menu);
3364       text_view->popup_menu = NULL;
3365     }
3366
3367   text_window_unrealize (text_view->text_window);
3368
3369   if (text_view->left_window)
3370     text_window_unrealize (text_view->left_window);
3371
3372   if (text_view->top_window)
3373     text_window_unrealize (text_view->top_window);
3374
3375   if (text_view->right_window)
3376     text_window_unrealize (text_view->right_window);
3377
3378   if (text_view->bottom_window)
3379     text_window_unrealize (text_view->bottom_window);
3380
3381   gtk_text_view_destroy_layout (text_view);
3382
3383   (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
3384 }
3385
3386 static void
3387 gtk_text_view_style_set (GtkWidget *widget,
3388                          GtkStyle  *previous_style)
3389 {
3390   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3391
3392   if (GTK_WIDGET_REALIZED (widget))
3393     {
3394       gdk_window_set_background (widget->window,
3395                                  &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3396
3397       gdk_window_set_background (text_view->text_window->bin_window,
3398                                  &widget->style->base[GTK_WIDGET_STATE (widget)]);
3399
3400       if (text_view->left_window)
3401         gdk_window_set_background (text_view->left_window->bin_window,
3402                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3403       if (text_view->right_window)
3404         gdk_window_set_background (text_view->right_window->bin_window,
3405                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3406
3407       if (text_view->top_window)
3408         gdk_window_set_background (text_view->top_window->bin_window,
3409                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3410
3411       if (text_view->bottom_window)
3412         gdk_window_set_background (text_view->bottom_window->bin_window,
3413                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3414
3415       gtk_text_view_realize_cursor_gc (text_view);
3416     }
3417
3418   if (text_view->layout && previous_style)
3419     {
3420       gtk_text_view_set_attributes_from_style (text_view,
3421                                                text_view->layout->default_style,
3422                                                widget->style);
3423       gtk_text_layout_default_style_changed (text_view->layout);
3424     }
3425 }
3426
3427 static void
3428 gtk_text_view_direction_changed (GtkWidget        *widget,
3429                                  GtkTextDirection  previous_direction)
3430 {
3431   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3432
3433   if (text_view->layout)
3434     {
3435       text_view->layout->default_style->direction = gtk_widget_get_direction (widget);
3436       gtk_text_layout_default_style_changed (text_view->layout);
3437     }
3438 }
3439
3440
3441 static void
3442 set_invisible_cursor (GdkWindow *window)
3443 {
3444   GdkBitmap *empty_bitmap;
3445   GdkCursor *cursor;
3446   GdkColor useless;
3447   char invisible_cursor_bits[] = { 0x0 };
3448
3449   useless.red = useless.green = useless.blue = 0;
3450   useless.pixel = 0;
3451
3452   empty_bitmap = gdk_bitmap_create_from_data (window,
3453                                               invisible_cursor_bits,
3454                                               1, 1);
3455
3456   cursor = gdk_cursor_new_from_pixmap (empty_bitmap,
3457                                        empty_bitmap,
3458                                        &useless,
3459                                        &useless, 0, 0);
3460
3461   gdk_window_set_cursor (window, cursor);
3462
3463   gdk_cursor_unref (cursor);
3464
3465   g_object_unref (empty_bitmap);
3466 }
3467
3468 static void
3469 gtk_text_view_obscure_mouse_cursor (GtkTextView *text_view)
3470 {
3471   if (text_view->mouse_cursor_obscured)
3472     return;
3473
3474   set_invisible_cursor (text_view->text_window->bin_window);
3475
3476   text_view->mouse_cursor_obscured = TRUE;
3477 }
3478
3479 /*
3480  * Events
3481  */
3482
3483 static gboolean
3484 get_event_coordinates (GdkEvent *event, gint *x, gint *y)
3485 {
3486   if (event)
3487     switch (event->type)
3488       {
3489       case GDK_MOTION_NOTIFY:
3490         *x = event->motion.x;
3491         *y = event->motion.y;
3492         return TRUE;
3493         break;
3494
3495       case GDK_BUTTON_PRESS:
3496       case GDK_2BUTTON_PRESS:
3497       case GDK_3BUTTON_PRESS:
3498       case GDK_BUTTON_RELEASE:
3499         *x = event->button.x;
3500         *y = event->button.y;
3501         return TRUE;
3502         break;
3503
3504       case GDK_KEY_PRESS:
3505       case GDK_KEY_RELEASE:
3506       case GDK_ENTER_NOTIFY:
3507       case GDK_LEAVE_NOTIFY:
3508       case GDK_PROPERTY_NOTIFY:
3509       case GDK_SELECTION_CLEAR:
3510       case GDK_SELECTION_REQUEST:
3511       case GDK_SELECTION_NOTIFY:
3512       case GDK_PROXIMITY_IN:
3513       case GDK_PROXIMITY_OUT:
3514       case GDK_DRAG_ENTER:
3515       case GDK_DRAG_LEAVE:
3516       case GDK_DRAG_MOTION:
3517       case GDK_DRAG_STATUS:
3518       case GDK_DROP_START:
3519       case GDK_DROP_FINISHED:
3520       default:
3521         return FALSE;
3522         break;
3523       }
3524
3525   return FALSE;
3526 }
3527
3528 static gint
3529 emit_event_on_tags (GtkWidget   *widget,
3530                     GdkEvent    *event,
3531                     GtkTextIter *iter)
3532 {
3533   GSList *tags;
3534   GSList *tmp;
3535   gboolean retval = FALSE;
3536   GtkTextView *text_view;
3537
3538   text_view = GTK_TEXT_VIEW (widget);
3539
3540   tags = gtk_text_iter_get_tags (iter);
3541
3542   tmp = tags;
3543   while (tmp != NULL)
3544     {
3545       GtkTextTag *tag = tmp->data;
3546
3547       if (gtk_text_tag_event (tag, G_OBJECT (widget), event, iter))
3548         {
3549           retval = TRUE;
3550           break;
3551         }
3552
3553       tmp = g_slist_next (tmp);
3554     }
3555
3556   g_slist_free (tags);
3557
3558   return retval;
3559 }
3560
3561 static gint
3562 gtk_text_view_event (GtkWidget *widget, GdkEvent *event)
3563 {
3564   GtkTextView *text_view;
3565   gint x = 0, y = 0;
3566
3567   text_view = GTK_TEXT_VIEW (widget);
3568
3569   if (text_view->layout == NULL ||
3570       get_buffer (text_view) == NULL)
3571     return FALSE;
3572
3573   if (event->any.window != text_view->text_window->bin_window)
3574     return FALSE;
3575
3576   if (get_event_coordinates (event, &x, &y))
3577     {
3578       GtkTextIter iter;
3579
3580       x += text_view->xoffset;
3581       y += text_view->yoffset;
3582
3583       /* FIXME this is slow and we do it twice per event.
3584        * My favorite solution is to have GtkTextLayout cache
3585        * the last couple lookups.
3586        */
3587       gtk_text_layout_get_iter_at_pixel (text_view->layout,
3588                                          &iter,
3589                                          x, y);
3590
3591       return emit_event_on_tags (widget, event, &iter);
3592     }
3593   else if (event->type == GDK_KEY_PRESS ||
3594            event->type == GDK_KEY_RELEASE)
3595     {
3596       GtkTextMark *insert;
3597       GtkTextIter iter;
3598
3599       insert = gtk_text_buffer_get_mark (get_buffer (text_view),
3600                                          "insert");
3601
3602       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
3603
3604       return emit_event_on_tags (widget, event, &iter);
3605     }
3606   else
3607     return FALSE;
3608 }
3609
3610 static gint
3611 gtk_text_view_key_press_event (GtkWidget *widget, GdkEventKey *event)
3612 {
3613   gboolean retval = FALSE;
3614   gboolean obscure = FALSE;
3615   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3616   GtkTextMark *insert;
3617   GtkTextIter iter;
3618
3619   if (text_view->layout == NULL ||
3620       get_buffer (text_view) == NULL)
3621     return FALSE;
3622
3623   insert = gtk_text_buffer_get_insert (get_buffer (text_view));
3624   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
3625   if (gtk_text_iter_can_insert (&iter, text_view->editable) &&
3626       gtk_im_context_filter_keypress (text_view->im_context, event))
3627     {
3628       text_view->need_im_reset = TRUE;
3629       obscure = TRUE;
3630       retval = TRUE;
3631     }
3632   else if (GTK_WIDGET_CLASS (parent_class)->key_press_event &&
3633            GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, event))
3634     retval = TRUE;
3635   else if (event->keyval == GDK_Return ||
3636            event->keyval == GDK_KP_Enter)
3637     {
3638       gtk_text_view_commit_text (text_view, "\n");
3639
3640       obscure = TRUE;
3641       retval = TRUE;
3642     }
3643   /* Pass through Tab as literal tab, unless Control is held down */
3644   else if ((event->keyval == GDK_Tab ||
3645             event->keyval == GDK_KP_Tab) &&
3646            !(event->state & GDK_CONTROL_MASK))
3647     {
3648       /* If the text isn't editable, move the focus instead */
3649       if (text_view->editable)
3650         {
3651           gtk_text_view_commit_text (text_view, "\t");
3652           obscure = TRUE;
3653         }
3654       else
3655         gtk_text_view_move_focus (text_view,
3656                                   (event->state & GDK_SHIFT_MASK) ?
3657                                   GTK_DIR_TAB_BACKWARD: GTK_DIR_TAB_FORWARD);
3658
3659       retval = TRUE;
3660     }
3661   else
3662     retval = FALSE;
3663
3664   if (obscure)
3665     gtk_text_view_obscure_mouse_cursor (text_view);
3666
3667   gtk_text_view_pend_cursor_blink (text_view);
3668
3669   return retval;
3670 }
3671
3672 static gint
3673 gtk_text_view_key_release_event (GtkWidget *widget, GdkEventKey *event)
3674 {
3675   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3676   GtkTextMark *insert;
3677   GtkTextIter iter;
3678
3679   if (text_view->layout == NULL || get_buffer (text_view) == NULL)
3680     return FALSE;
3681
3682   insert = gtk_text_buffer_get_insert (get_buffer (text_view));
3683   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
3684   if (gtk_text_iter_can_insert (&iter, text_view->editable) &&
3685       gtk_im_context_filter_keypress (text_view->im_context, event))
3686     {
3687       text_view->need_im_reset = TRUE;
3688       return TRUE;
3689     }
3690   else
3691     return GTK_WIDGET_CLASS (parent_class)->key_release_event (widget, event);
3692 }
3693
3694 static gint
3695 gtk_text_view_button_press_event (GtkWidget *widget, GdkEventButton *event)
3696 {
3697   GtkTextView *text_view;
3698
3699   text_view = GTK_TEXT_VIEW (widget);
3700
3701   text_view->disable_scroll_on_focus = TRUE;
3702   gtk_widget_grab_focus (widget);
3703   text_view->disable_scroll_on_focus = FALSE;
3704
3705   if (event->window != text_view->text_window->bin_window)
3706     {
3707       /* Remove selection if any. */
3708       gtk_text_view_unselect (text_view);
3709       return FALSE;
3710     }
3711
3712 #if 0
3713   /* debug hack */
3714   if (event->button == 3 && (event->state & GDK_CONTROL_MASK) != 0)
3715     _gtk_text_buffer_spew (GTK_TEXT_VIEW (widget)->buffer);
3716   else if (event->button == 3)
3717     gtk_text_layout_spew (GTK_TEXT_VIEW (widget)->layout);
3718 #endif
3719
3720   if (event->type == GDK_BUTTON_PRESS)
3721     {
3722       gtk_text_view_reset_im_context (text_view);
3723
3724       if (event->button == 1)
3725         {
3726           /* If we're in the selection, start a drag copy/move of the
3727            * selection; otherwise, start creating a new selection.
3728            */
3729           GtkTextIter iter;
3730           GtkTextIter start, end;
3731
3732           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3733                                              &iter,
3734                                              event->x + text_view->xoffset,
3735                                              event->y + text_view->yoffset);
3736
3737           if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
3738                                                     &start, &end) &&
3739               gtk_text_iter_in_range (&iter, &start, &end))
3740             {
3741               text_view->drag_start_x = event->x;
3742               text_view->drag_start_y = event->y;
3743               text_view->pending_place_cursor_button = event->button;
3744             }
3745           else
3746             {
3747               gtk_text_view_start_selection_drag (text_view, &iter, event);
3748             }
3749
3750           return TRUE;
3751         }
3752       else if (event->button == 2)
3753         {
3754           GtkTextIter iter;
3755
3756           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3757                                              &iter,
3758                                              event->x + text_view->xoffset,
3759                                              event->y + text_view->yoffset);
3760
3761           gtk_text_buffer_paste_clipboard (get_buffer (text_view),
3762                                            gtk_clipboard_get (GDK_SELECTION_PRIMARY),
3763                                            &iter,
3764                                            text_view->editable);
3765           return TRUE;
3766         }
3767       else if (event->button == 3)
3768         {
3769           gtk_text_view_do_popup (text_view, event);
3770         }
3771     }
3772   else if ((event->type == GDK_2BUTTON_PRESS ||
3773             event->type == GDK_3BUTTON_PRESS) &&
3774            event->button == 1)
3775     {
3776       GtkTextIter start, end;
3777
3778       /* End the selection drag, otherwise we'd clear the new
3779        * word/line selection on button release
3780        */
3781       gtk_text_view_end_selection_drag (text_view, event);
3782
3783       gtk_text_layout_get_iter_at_pixel (text_view->layout,
3784                                          &start,
3785                                          event->x + text_view->xoffset,
3786                                          event->y + text_view->yoffset);
3787
3788       end = start;
3789
3790       if (event->type == GDK_2BUTTON_PRESS)
3791         {
3792           if (gtk_text_iter_inside_word (&start))
3793             {
3794               if (!gtk_text_iter_starts_word (&start))
3795                 gtk_text_iter_backward_word_start (&start);
3796
3797               if (!gtk_text_iter_ends_word (&end))
3798                 gtk_text_iter_forward_word_end (&end);
3799             }
3800         }
3801       else if (event->type == GDK_3BUTTON_PRESS)
3802         {
3803           if (gtk_text_view_starts_display_line (text_view, &start))
3804             {
3805               /* If on a display line boundary, we assume the user
3806                * clicked off the end of a line and we therefore select
3807                * the line before the boundary.
3808                */
3809               gtk_text_view_backward_display_line_start (text_view, &start);
3810             }
3811           else
3812             {
3813               /* start isn't on the start of a line, so we move it to the
3814                * start, and move end to the end unless it's already there.
3815                */
3816               gtk_text_view_backward_display_line_start (text_view, &start);
3817
3818               if (!gtk_text_view_starts_display_line (text_view, &end))
3819                 gtk_text_view_forward_display_line_end (text_view, &end);
3820             }
3821         }
3822
3823       if (event->state & GDK_SHIFT_MASK)
3824         {
3825           /* Take union of old and new selection */
3826           GtkTextIter old_start, old_end;
3827
3828           gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
3829                                                 &old_start, &old_end);
3830
3831           gtk_text_iter_order (&start, &old_start);
3832           gtk_text_iter_order (&old_end, &end);
3833
3834           /* Now start is the first of the starts, and end is the
3835            * last of the ends
3836            */
3837         }
3838
3839       gtk_text_buffer_move_mark_by_name (get_buffer (text_view),
3840                                          "selection_bound",
3841                                          &start);
3842       gtk_text_buffer_move_mark_by_name (get_buffer (text_view),
3843                                          "insert",
3844                                          &end);
3845
3846       text_view->just_selected_element = TRUE;
3847
3848       return TRUE;
3849     }
3850
3851   return FALSE;
3852 }
3853
3854 static gint
3855 gtk_text_view_button_release_event (GtkWidget *widget, GdkEventButton *event)
3856 {
3857   GtkTextView *text_view;
3858
3859   text_view = GTK_TEXT_VIEW (widget);
3860
3861   if (event->window != text_view->text_window->bin_window)
3862     return FALSE;
3863
3864   if (event->button == 1)
3865     {
3866       if (text_view->drag_start_x >= 0)
3867         {
3868           text_view->drag_start_x = -1;
3869           text_view->drag_start_y = -1;
3870         }
3871
3872       if (gtk_text_view_end_selection_drag (GTK_TEXT_VIEW (widget), event))
3873         return TRUE;
3874       else if (text_view->just_selected_element)
3875         {
3876           text_view->just_selected_element = FALSE;
3877           return FALSE;
3878         }
3879       else if (text_view->pending_place_cursor_button == event->button)
3880         {
3881           GtkTextIter iter;
3882
3883           /* Unselect everything; we clicked inside selection, but
3884            * didn't move by the drag threshold, so just clear selection
3885            * and place cursor.
3886            */
3887           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3888                                              &iter,
3889                                              event->x + text_view->xoffset,
3890                                              event->y + text_view->yoffset);
3891
3892           gtk_text_buffer_place_cursor (get_buffer (text_view), &iter);
3893
3894           text_view->pending_place_cursor_button = 0;
3895
3896           return FALSE;
3897         }
3898     }
3899
3900   return FALSE;
3901 }
3902
3903 static void
3904 keymap_direction_changed (GdkKeymap   *keymap,
3905                           GtkTextView *text_view)
3906 {
3907   gtk_text_view_check_keymap_direction (text_view);
3908 }
3909
3910 static gint
3911 gtk_text_view_focus_in_event (GtkWidget *widget, GdkEventFocus *event)
3912 {
3913   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3914
3915   gtk_widget_queue_draw (widget);
3916
3917   DV(g_print (G_STRLOC": focus_in_event\n"));
3918
3919   if (text_view->cursor_visible && text_view->layout)
3920     {
3921       gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3922       gtk_text_view_check_cursor_blink (text_view);
3923     }
3924
3925   g_signal_connect (gdk_keymap_get_default (),
3926                     "direction_changed",
3927                     G_CALLBACK (keymap_direction_changed), text_view);
3928   gtk_text_view_check_keymap_direction (text_view);
3929
3930   text_view->need_im_reset = TRUE;
3931   gtk_im_context_focus_in (GTK_TEXT_VIEW (widget)->im_context);
3932
3933   return FALSE;
3934 }
3935
3936 static gint
3937 gtk_text_view_focus_out_event (GtkWidget *widget, GdkEventFocus *event)
3938 {
3939   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3940
3941   gtk_widget_queue_draw (widget);
3942
3943   DV(g_print (G_STRLOC": focus_out_event\n"));
3944
3945   if (text_view->cursor_visible && text_view->layout)
3946     {
3947       gtk_text_layout_set_cursor_visible (text_view->layout, FALSE);
3948       gtk_text_view_check_cursor_blink (text_view);
3949     }
3950
3951   g_signal_handlers_disconnect_by_func (gdk_keymap_get_default (),
3952                                         keymap_direction_changed,
3953                                         text_view);
3954
3955   text_view->need_im_reset = TRUE;
3956   gtk_im_context_focus_out (GTK_TEXT_VIEW (widget)->im_context);
3957
3958   return FALSE;
3959 }
3960
3961 static gint
3962 gtk_text_view_motion_event (GtkWidget *widget, GdkEventMotion *event)
3963 {
3964   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3965
3966   if (text_view->mouse_cursor_obscured)
3967     {
3968       GdkCursor *cursor;
3969
3970       cursor = gdk_cursor_new (GDK_XTERM);
3971       gdk_window_set_cursor (text_view->text_window->bin_window, cursor);
3972       gdk_cursor_unref (cursor);
3973       text_view->mouse_cursor_obscured = FALSE;
3974     }
3975
3976   if (event->window == text_view->text_window->bin_window &&
3977       text_view->drag_start_x >= 0)
3978     {
3979       gint x, y;
3980
3981       gdk_window_get_pointer (text_view->text_window->bin_window,
3982                               &x, &y, NULL);
3983
3984       if (gtk_drag_check_threshold (widget,
3985                                     text_view->drag_start_x,
3986                                     text_view->drag_start_y,
3987                                     x, y))
3988         {
3989           GtkTextIter iter;
3990           gint buffer_x, buffer_y;
3991
3992           gtk_text_view_window_to_buffer_coords (text_view,
3993                                                  GTK_TEXT_WINDOW_TEXT,
3994                                                  text_view->drag_start_x,
3995                                                  text_view->drag_start_y,
3996                                                  &buffer_x,
3997                                                  &buffer_y);
3998
3999           gtk_text_layout_get_iter_at_pixel (text_view->layout,
4000                                              &iter,
4001                                              buffer_x, buffer_y);
4002
4003           gtk_text_view_start_selection_dnd (text_view, &iter, event);
4004           return TRUE;
4005         }
4006     }
4007
4008   return FALSE;
4009 }
4010
4011 static void
4012 gtk_text_view_paint (GtkWidget      *widget,
4013                      GdkRectangle   *area,
4014                      GdkEventExpose *event)
4015 {
4016   GtkTextView *text_view;
4017   GList *child_exposes;
4018   GList *tmp_list;
4019   GdkRegion *updates;
4020
4021   text_view = GTK_TEXT_VIEW (widget);
4022
4023   g_return_if_fail (text_view->layout != NULL);
4024   g_return_if_fail (text_view->xoffset >= 0);
4025   g_return_if_fail (text_view->yoffset >= 0);
4026
4027   while (text_view->first_validate_idle != 0)
4028     {
4029       DV (g_print (G_STRLOC": first_validate_idle: %d\n",
4030                    text_view->first_validate_idle));
4031       gtk_text_view_flush_first_validate (text_view);
4032     }
4033
4034   /* More regions could have become invalid in the above loop */
4035   updates = gdk_window_get_update_area (text_view->text_window->bin_window);
4036   if (updates)
4037     {
4038       GdkRectangle rect;
4039
4040       gdk_region_get_clipbox (updates, &rect);
4041
4042       gdk_rectangle_union (area, &rect, area);
4043
4044       gdk_region_destroy (updates);
4045     }
4046
4047   if (!text_view->onscreen_validated)
4048     {
4049       g_warning (G_STRLOC ": somehow some text lines were modified or scrolling occurred since the last validation of lines on the screen - may be a text widget bug.");
4050       G_BREAKPOINT ();
4051     }
4052
4053 #if 0
4054   printf ("painting %d,%d  %d x %d\n",
4055           area->x, area->y,
4056           area->width, area->height);
4057 #endif
4058
4059   child_exposes = NULL;
4060   gtk_text_layout_draw (text_view->layout,
4061                         widget,
4062                         text_view->text_window->bin_window,
4063                         text_view->cursor_gc,
4064                         text_view->xoffset,
4065                         text_view->yoffset,
4066                         area->x, area->y,
4067                         area->width, area->height,
4068                         &child_exposes);
4069
4070   tmp_list = child_exposes;
4071   while (tmp_list != NULL)
4072     {
4073       GtkWidget *child = tmp_list->data;
4074
4075       gtk_container_propagate_expose (GTK_CONTAINER (text_view),
4076                                       child,
4077                                       event);
4078
4079       g_object_unref (G_OBJECT (child));
4080
4081       tmp_list = tmp_list->next;
4082     }
4083
4084   g_list_free (child_exposes);
4085 }
4086
4087 static gint
4088 gtk_text_view_expose_event (GtkWidget *widget, GdkEventExpose *event)
4089 {
4090   GSList *tmp_list;
4091
4092   if (event->window == gtk_text_view_get_window (GTK_TEXT_VIEW (widget),
4093                                                  GTK_TEXT_WINDOW_TEXT))
4094     {
4095       DV(g_print (">Exposed ("G_STRLOC")\n"));
4096       gtk_text_view_paint (widget, &event->area, event);
4097     }
4098
4099   if (event->window == widget->window)
4100     gtk_text_view_draw_focus (widget);
4101
4102   /* Propagate exposes to all children not in the buffer. */
4103   tmp_list = GTK_TEXT_VIEW (widget)->children;
4104   while (tmp_list != NULL)
4105     {
4106       GtkTextViewChild *vc = tmp_list->data;
4107
4108       /* propagate_expose checks that event->window matches
4109        * child->window
4110        */
4111       if (vc->type != GTK_TEXT_WINDOW_TEXT)
4112         gtk_container_propagate_expose (GTK_CONTAINER (widget),
4113                                         vc->widget,
4114                                         event);
4115
4116       tmp_list = tmp_list->next;
4117     }
4118
4119   return FALSE;
4120 }
4121
4122 static void
4123 gtk_text_view_draw_focus (GtkWidget *widget)
4124 {
4125   gboolean interior_focus;
4126
4127   /* We clear the focus if we are in interior focus mode. */
4128   gtk_widget_style_get (widget,
4129                         "interior_focus", &interior_focus,
4130                         NULL);
4131
4132   if (GTK_WIDGET_DRAWABLE (widget))
4133     {
4134       if (GTK_WIDGET_HAS_FOCUS (widget) && !interior_focus)
4135         {
4136           gtk_paint_focus (widget->style, widget->window, GTK_WIDGET_STATE (widget),
4137                            NULL, widget, "textview",
4138                            0, 0,
4139                            widget->allocation.width,
4140                            widget->allocation.height);
4141         }
4142       else
4143         {
4144           gdk_window_clear (widget->window);
4145         }
4146     }
4147 }
4148
4149 static void
4150 gtk_text_view_grab_focus (GtkWidget *widget)
4151 {
4152   GtkTextView *text_view;
4153
4154   text_view = GTK_TEXT_VIEW (widget);
4155
4156   GTK_WIDGET_CLASS (parent_class)->grab_focus (widget);
4157
4158   if (!text_view->disable_scroll_on_focus)
4159     gtk_text_view_scroll_mark_onscreen (text_view,
4160                                         gtk_text_buffer_get_mark (get_buffer (text_view),
4161                                                                   "insert"));
4162 }
4163
4164 static gboolean
4165 gtk_text_view_focus (GtkWidget        *widget,
4166                      GtkDirectionType  direction)
4167 {
4168   GtkTextView *text_view;
4169   GtkContainer *container;
4170
4171   text_view = GTK_TEXT_VIEW (widget);
4172   container = GTK_CONTAINER (widget);
4173
4174   return GTK_WIDGET_CLASS (parent_class)->focus (widget, direction);
4175 }
4176
4177 /*
4178  * Container
4179  */
4180
4181 static void
4182 gtk_text_view_add (GtkContainer *container,
4183                    GtkWidget    *child)
4184 {
4185   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
4186   g_return_if_fail (GTK_IS_WIDGET (child));
4187
4188   /* This is pretty random. */
4189   gtk_text_view_add_child_in_window (GTK_TEXT_VIEW (container),
4190                                      child,
4191                                      GTK_TEXT_WINDOW_WIDGET,
4192                                      0, 0);
4193 }
4194
4195 static void
4196 gtk_text_view_remove (GtkContainer *container,
4197                       GtkWidget    *child)
4198 {
4199   GSList *iter;
4200   GtkTextView *text_view;
4201   GtkTextViewChild *vc;
4202
4203   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
4204   g_return_if_fail (GTK_IS_WIDGET (child));
4205   g_return_if_fail (child->parent == (GtkWidget*) container);
4206
4207   text_view = GTK_TEXT_VIEW (container);
4208
4209   vc = NULL;
4210   iter = text_view->children;
4211
4212   while (iter != NULL)
4213     {
4214       vc = iter->data;
4215
4216       if (vc->widget == child)
4217         break;
4218
4219       iter = g_slist_next (iter);
4220     }
4221
4222   g_assert (iter != NULL); /* be sure we had the child in the list */
4223
4224   text_view->children = g_slist_remove (text_view->children, vc);
4225
4226   gtk_widget_unparent (vc->widget);
4227
4228   text_view_child_free (vc);
4229 }
4230
4231 static void
4232 gtk_text_view_forall (GtkContainer *container,
4233                       gboolean      include_internals,
4234                       GtkCallback   callback,
4235                       gpointer      callback_data)
4236 {
4237   GSList *iter;
4238   GtkTextView *text_view;
4239   GSList *copy;
4240
4241   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
4242   g_return_if_fail (callback != NULL);
4243
4244   text_view = GTK_TEXT_VIEW (container);
4245
4246   copy = g_slist_copy (text_view->children);
4247   iter = copy;
4248
4249   while (iter != NULL)
4250     {
4251       GtkTextViewChild *vc = iter->data;
4252
4253       (* callback) (vc->widget, callback_data);
4254
4255       iter = g_slist_next (iter);
4256     }
4257
4258   g_slist_free (copy);
4259 }
4260
4261 #define CURSOR_ON_MULTIPLIER 0.66
4262 #define CURSOR_OFF_MULTIPLIER 0.34
4263 #define CURSOR_PEND_MULTIPLIER 1.0
4264
4265 static gboolean
4266 cursor_blinks (GtkTextView *text_view)
4267 {
4268   GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
4269   gboolean blink;
4270
4271 #ifdef DEBUG_VALIDATION_AND_SCROLLING
4272   return FALSE;
4273 #endif
4274   if (gtk_debug_flags & GTK_DEBUG_UPDATES)
4275     return FALSE;
4276
4277   g_object_get (G_OBJECT (settings), "gtk-cursor-blink", &blink, NULL);
4278   return blink;
4279 }
4280
4281 static gint
4282 get_cursor_time (GtkTextView *text_view)
4283 {
4284   GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
4285   gint time;
4286
4287   g_object_get (G_OBJECT (settings), "gtk-cursor-blink-time", &time, NULL);
4288
4289   return time;
4290 }
4291
4292 /*
4293  * Blink!
4294  */
4295
4296 static gint
4297 blink_cb (gpointer data)
4298 {
4299   GtkTextView *text_view;
4300   gboolean visible;
4301
4302   GDK_THREADS_ENTER ();
4303
4304   text_view = GTK_TEXT_VIEW (data);
4305
4306   g_assert (text_view->layout);
4307   g_assert (GTK_WIDGET_HAS_FOCUS (text_view));
4308   g_assert (text_view->cursor_visible);
4309
4310   visible = gtk_text_layout_get_cursor_visible (text_view->layout);
4311
4312   if (visible)
4313     text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_OFF_MULTIPLIER,
4314                                                 blink_cb,
4315                                                 text_view);
4316   else
4317     text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_ON_MULTIPLIER,
4318                                                 blink_cb,
4319                                                 text_view);
4320
4321   gtk_text_layout_set_cursor_visible (text_view->layout,
4322                                       !visible);
4323
4324   GDK_THREADS_LEAVE ();
4325
4326   /* Remove ourselves */
4327   return FALSE;
4328 }
4329
4330
4331 static void
4332 gtk_text_view_stop_cursor_blink (GtkTextView *text_view)
4333 {
4334   if (text_view->blink_timeout)
4335     {
4336       gtk_timeout_remove (text_view->blink_timeout);
4337       text_view->blink_timeout = 0;
4338     }
4339 }
4340
4341 static void
4342 gtk_text_view_check_cursor_blink (GtkTextView *text_view)
4343 {
4344   if (text_view->layout != NULL &&
4345       text_view->cursor_visible &&
4346       GTK_WIDGET_HAS_FOCUS (text_view))
4347     {
4348       if (cursor_blinks (text_view))
4349         {
4350           if (text_view->blink_timeout == 0)
4351             {
4352               gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
4353
4354               text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_OFF_MULTIPLIER,
4355                                                           blink_cb,
4356                                                           text_view);
4357             }
4358         }
4359       else
4360         gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
4361     }
4362   else
4363     {
4364       gtk_text_view_stop_cursor_blink (text_view);
4365     }
4366 }
4367
4368 static void
4369 gtk_text_view_pend_cursor_blink(GtkTextView *text_view)
4370 {
4371   if (text_view->layout != NULL &&
4372       text_view->cursor_visible &&
4373       GTK_WIDGET_HAS_FOCUS (text_view) &&
4374       cursor_blinks (text_view))
4375     {
4376       if (text_view->blink_timeout != 0)
4377         {
4378           gtk_timeout_remove (text_view->blink_timeout);
4379           text_view->blink_timeout = 0;
4380         }
4381
4382       gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
4383
4384       text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_PEND_MULTIPLIER,
4385                                                   blink_cb,
4386                                                   text_view);
4387     }
4388 }
4389
4390
4391 /*
4392  * Key binding handlers
4393  */
4394
4395 static void
4396 gtk_text_view_move_iter_by_lines (GtkTextView *text_view,
4397                                   GtkTextIter *newplace,
4398                                   gint         count)
4399 {
4400   while (count < 0)
4401     {
4402       gtk_text_layout_move_iter_to_previous_line (text_view->layout, newplace);
4403       count++;
4404     }
4405
4406   while (count > 0)
4407     {
4408       gtk_text_layout_move_iter_to_next_line (text_view->layout, newplace);
4409       count--;
4410     }
4411 }
4412
4413 /* FIXME when we are unfrozen and can change GtkMovementStep,
4414  * fix this
4415  */
4416 #define PAGE_HORIZONTALLY_HACK_VALUE 57
4417
4418 static void
4419 gtk_text_view_move_cursor_internal (GtkTextView     *text_view,
4420                                     GtkMovementStep  step,
4421                                     gint             count,
4422                                     gboolean         extend_selection)
4423 {
4424   GtkTextIter insert;
4425   GtkTextIter newplace;
4426
4427   gint cursor_x_pos = 0;
4428
4429   gtk_text_view_reset_im_context (text_view);
4430
4431   if (step == GTK_MOVEMENT_PAGES)
4432     {
4433       gtk_text_view_scroll_pages (text_view, count);
4434       gtk_text_view_pend_cursor_blink (text_view);
4435       return;
4436     }
4437   else if (step == PAGE_HORIZONTALLY_HACK_VALUE)
4438     {
4439       gtk_text_view_scroll_hpages (text_view, count);
4440       gtk_text_view_pend_cursor_blink (text_view);
4441       return;
4442     }
4443
4444   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
4445                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4446                                                               "insert"));
4447   newplace = insert;
4448
4449   if (step == GTK_MOVEMENT_DISPLAY_LINES)
4450     gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, NULL);
4451
4452   switch (step)
4453     {
4454     case GTK_MOVEMENT_LOGICAL_POSITIONS:
4455       gtk_text_iter_forward_cursor_positions (&newplace, count);
4456       break;
4457
4458     case GTK_MOVEMENT_VISUAL_POSITIONS:
4459       gtk_text_layout_move_iter_visually (text_view->layout,
4460                                           &newplace, count);
4461       break;
4462
4463     case GTK_MOVEMENT_WORDS:
4464       if (count < 0)
4465         gtk_text_iter_backward_word_starts (&newplace, -count);
4466       else if (count > 0)
4467         gtk_text_iter_forward_word_ends (&newplace, count);
4468       break;
4469
4470     case GTK_MOVEMENT_DISPLAY_LINES:
4471       gtk_text_view_move_iter_by_lines (text_view, &newplace, count);
4472       gtk_text_layout_move_iter_to_x (text_view->layout, &newplace, cursor_x_pos);
4473       break;
4474
4475     case GTK_MOVEMENT_DISPLAY_LINE_ENDS:
4476       if (count > 1)
4477         gtk_text_view_move_iter_by_lines (text_view, &newplace, --count);
4478       else if (count < -1)
4479         gtk_text_view_move_iter_by_lines (text_view, &newplace, ++count);
4480
4481       if (count != 0)
4482         gtk_text_layout_move_iter_to_line_end (text_view->layout, &newplace, count);
4483       break;
4484
4485     case GTK_MOVEMENT_PARAGRAPHS:
4486       if (count > 0)
4487         {
4488           if (!gtk_text_iter_ends_line (&newplace))
4489             {
4490               gtk_text_iter_forward_to_line_end (&newplace);
4491               --count;
4492             }
4493         }
4494       else if (count < 0)
4495         {
4496           if (gtk_text_iter_get_line_offset (&newplace) > 0)
4497             {
4498               gtk_text_iter_set_line_offset (&newplace, 0);
4499               ++count;
4500             }
4501         }
4502
4503       if (count != 0)
4504         {
4505           gtk_text_iter_forward_lines (&newplace, count);
4506           gtk_text_iter_set_line_offset (&newplace, 0);
4507         }
4508       break;
4509
4510     case GTK_MOVEMENT_PARAGRAPH_ENDS:
4511       if (count > 0)
4512         {
4513           if (!gtk_text_iter_ends_line (&newplace))
4514             gtk_text_iter_forward_to_line_end (&newplace);
4515         }
4516       else if (count < 0)
4517         {
4518           gtk_text_iter_set_line_offset (&newplace, 0);
4519         }
4520       break;
4521
4522     case GTK_MOVEMENT_BUFFER_ENDS:
4523       if (count > 0)
4524         gtk_text_buffer_get_end_iter (get_buffer (text_view), &newplace);
4525       else if (count < 0)
4526         gtk_text_buffer_get_iter_at_offset (get_buffer (text_view), &newplace, 0);
4527       break;
4528
4529     default:
4530       break;
4531     }
4532
4533   if (!gtk_text_iter_equal (&insert, &newplace))
4534     {
4535       if (extend_selection)
4536         gtk_text_buffer_move_mark (get_buffer (text_view),
4537                                    gtk_text_buffer_get_mark (get_buffer (text_view),
4538                                                              "insert"),
4539                                    &newplace);
4540       else
4541         gtk_text_buffer_place_cursor (get_buffer (text_view), &newplace);
4542
4543       DV(g_print (G_STRLOC": scrolling onscreen\n"));
4544       gtk_text_view_scroll_mark_onscreen (text_view,
4545                                           gtk_text_buffer_get_mark (get_buffer (text_view),
4546                                                                     "insert"));
4547
4548       if (step == GTK_MOVEMENT_DISPLAY_LINES)
4549         {
4550           gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, -1);
4551         }
4552     }
4553
4554   gtk_text_view_pend_cursor_blink (text_view);
4555 }
4556
4557 static void
4558 gtk_text_view_move_cursor (GtkTextView     *text_view,
4559                            GtkMovementStep  step,
4560                            gint             count,
4561                            gboolean         extend_selection)
4562 {
4563   gtk_text_view_move_cursor_internal (text_view, step, count, extend_selection);
4564 }
4565
4566 static void
4567 gtk_text_view_page_horizontally (GtkTextView     *text_view,
4568                                  gint             count,
4569                                  gboolean         extend_selection)
4570 {
4571   gtk_text_view_move_cursor_internal (text_view, PAGE_HORIZONTALLY_HACK_VALUE,
4572                                       count, extend_selection);
4573 }
4574
4575 static void
4576 gtk_text_view_set_anchor (GtkTextView *text_view)
4577 {
4578   GtkTextIter insert;
4579
4580   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
4581                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4582                                                               "insert"));
4583
4584   gtk_text_buffer_create_mark (get_buffer (text_view), "anchor", &insert, TRUE);
4585 }
4586
4587 static void
4588 gtk_text_view_scroll_pages (GtkTextView *text_view,
4589                             gint         count)
4590 {
4591   gdouble newval;
4592   gdouble oldval;
4593   GtkAdjustment *adj;
4594   gint cursor_x_pos, cursor_y_pos;
4595   GtkTextIter new_insert;
4596   GtkTextIter anchor;
4597   gint y0, y1;
4598
4599   g_return_if_fail (text_view->vadjustment != NULL);
4600
4601   adj = text_view->vadjustment;
4602
4603   /* Validate the region that will be brought into view by the cursor motion
4604    */
4605   if (count < 0)
4606     {
4607       gtk_text_view_get_first_para_iter (text_view, &anchor);
4608       y0 = adj->page_size;
4609       y1 = adj->page_size + count * adj->page_increment;
4610     }
4611   else
4612     {
4613       gtk_text_view_get_first_para_iter (text_view, &anchor);
4614       y0 = count * adj->page_increment + adj->page_size;
4615       y1 = 0;
4616     }
4617
4618   gtk_text_layout_validate_yrange (text_view->layout, &anchor, y0, y1);
4619   /* FIXME do we need to update the adjustment ranges here? */
4620
4621   if (count < 0 && adj->value <= (adj->lower + 1e-12))
4622     {
4623       /* already at top, just be sure we are at offset 0 */
4624       gtk_text_buffer_get_start_iter (get_buffer (text_view), &new_insert);
4625       gtk_text_buffer_place_cursor (get_buffer (text_view), &new_insert);
4626     }
4627   else if (count > 0 && adj->value >= (adj->upper - adj->page_size - 1e-12))
4628     {
4629       /* already at bottom, just be sure we are at the end */
4630       gtk_text_buffer_get_end_iter (get_buffer (text_view), &new_insert);
4631       gtk_text_buffer_place_cursor (get_buffer (text_view), &new_insert);
4632     }
4633   else
4634     {
4635       gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, &cursor_y_pos);
4636
4637       newval = adj->value;
4638       oldval = adj->value;
4639
4640       newval += count * adj->page_increment;
4641
4642       set_adjustment_clamped (adj, newval);
4643       cursor_y_pos += adj->value - oldval;
4644
4645       gtk_text_layout_get_iter_at_pixel (text_view->layout, &new_insert, cursor_x_pos, cursor_y_pos);
4646       clamp_iter_onscreen (text_view, &new_insert);
4647       gtk_text_buffer_place_cursor (get_buffer (text_view), &new_insert);
4648
4649       gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, cursor_y_pos);
4650     }
4651
4652   /* Adjust to have the cursor _entirely_ onscreen, move_mark_onscreen
4653    * only guarantees 1 pixel onscreen.
4654    */
4655   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4656   gtk_text_view_scroll_mark_onscreen (text_view,
4657                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4658                                                                 "insert"));
4659 }
4660
4661 static void
4662 gtk_text_view_scroll_hpages (GtkTextView *text_view,
4663                              gint         count)
4664 {
4665   gdouble newval;
4666   gdouble oldval;
4667   GtkAdjustment *adj;
4668   gint cursor_x_pos, cursor_y_pos;
4669   GtkTextIter new_insert;
4670   gint y, height;
4671
4672   g_return_if_fail (text_view->hadjustment != NULL);
4673
4674   adj = text_view->hadjustment;
4675
4676   /* Validate the line that we're moving within.
4677    */
4678   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4679                                     &new_insert,
4680                                     gtk_text_buffer_get_mark (get_buffer (text_view), "insert"));
4681   gtk_text_layout_get_line_yrange (text_view->layout, &new_insert, &y, &height);
4682   gtk_text_layout_validate_yrange (text_view->layout, &new_insert, y, y + height);
4683   /* FIXME do we need to update the adjustment ranges here? */
4684
4685   if (count < 0 && adj->value <= (adj->lower + 1e-12))
4686     {
4687       /* already at far left, just be sure we are at offset 0 */
4688       gtk_text_iter_set_line_offset (&new_insert, 0);
4689       gtk_text_buffer_place_cursor (get_buffer (text_view), &new_insert);
4690     }
4691   else if (count > 0 && adj->value >= (adj->upper - adj->page_size - 1e-12))
4692     {
4693       /* already at far right, just be sure we are at the end */
4694       gtk_text_iter_forward_to_line_end (&new_insert);
4695       gtk_text_buffer_place_cursor (get_buffer (text_view), &new_insert);
4696     }
4697   else
4698     {
4699       gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, &cursor_y_pos);
4700
4701       newval = adj->value;
4702       oldval = adj->value;
4703
4704       newval += count * adj->page_increment;
4705
4706       set_adjustment_clamped (adj, newval);
4707       cursor_x_pos += adj->value - oldval;
4708
4709       gtk_text_layout_get_iter_at_pixel (text_view->layout, &new_insert, cursor_x_pos, cursor_y_pos);
4710       clamp_iter_onscreen (text_view, &new_insert);
4711       gtk_text_buffer_place_cursor (get_buffer (text_view), &new_insert);
4712
4713       gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, cursor_y_pos);
4714     }
4715
4716   /*  FIXME for lines shorter than the overall widget width, this results in a
4717    *  "bounce" effect as we scroll to the right of the widget, then scroll
4718    *  back to get the end of the line onscreen.
4719    *      http://bugzilla.gnome.org/show_bug.cgi?id=68963
4720    */
4721
4722   /* Adjust to have the cursor _entirely_ onscreen, move_mark_onscreen
4723    * only guarantees 1 pixel onscreen.
4724    */
4725   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4726   gtk_text_view_scroll_mark_onscreen (text_view,
4727                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4728                                                                 "insert"));
4729 }
4730
4731 static gboolean
4732 whitespace (gunichar ch, gpointer user_data)
4733 {
4734   return (ch == ' ' || ch == '\t');
4735 }
4736
4737 static gboolean
4738 not_whitespace (gunichar ch, gpointer user_data)
4739 {
4740   return !whitespace (ch, user_data);
4741 }
4742
4743 static gboolean
4744 find_whitepace_region (const GtkTextIter *center,
4745                        GtkTextIter *start, GtkTextIter *end)
4746 {
4747   *start = *center;
4748   *end = *center;
4749
4750   if (gtk_text_iter_backward_find_char (start, not_whitespace, NULL, NULL))
4751     gtk_text_iter_forward_char (start); /* we want the first whitespace... */
4752   if (whitespace (gtk_text_iter_get_char (end), NULL))
4753     gtk_text_iter_forward_find_char (end, not_whitespace, NULL, NULL);
4754
4755   return !gtk_text_iter_equal (start, end);
4756 }
4757
4758 static void
4759 gtk_text_view_insert_at_cursor (GtkTextView *text_view,
4760                                 const gchar *str)
4761 {
4762   gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
4763                                                 text_view->editable);
4764 }
4765
4766 static void
4767 gtk_text_view_delete_from_cursor (GtkTextView   *text_view,
4768                                   GtkDeleteType  type,
4769                                   gint           count)
4770 {
4771   GtkTextIter insert;
4772   GtkTextIter start;
4773   GtkTextIter end;
4774   gboolean leave_one = FALSE;
4775
4776   gtk_text_view_reset_im_context (text_view);
4777
4778   if (type == GTK_DELETE_CHARS)
4779     {
4780       /* Char delete deletes the selection, if one exists */
4781       if (gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
4782                                             text_view->editable))
4783         return;
4784     }
4785
4786   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4787                                     &insert,
4788                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4789                                                               "insert"));
4790
4791   start = insert;
4792   end = insert;
4793
4794   switch (type)
4795     {
4796     case GTK_DELETE_CHARS:
4797       gtk_text_iter_forward_cursor_positions (&end, count);
4798       break;
4799
4800     case GTK_DELETE_WORD_ENDS:
4801       if (count > 0)
4802         gtk_text_iter_forward_word_ends (&end, count);
4803       else if (count < 0)
4804         gtk_text_iter_backward_word_starts (&start, 0 - count);
4805       break;
4806
4807     case GTK_DELETE_WORDS:
4808       break;
4809
4810     case GTK_DELETE_DISPLAY_LINE_ENDS:
4811       break;
4812
4813     case GTK_DELETE_DISPLAY_LINES:
4814       break;
4815
4816     case GTK_DELETE_PARAGRAPH_ENDS:
4817       /* If we're already at a newline, we need to
4818        * simply delete that newline, instead of
4819        * moving to the next one.
4820        */
4821       if (gtk_text_iter_ends_line (&end))
4822         {
4823           gtk_text_iter_forward_line (&end);
4824           --count;
4825         }
4826
4827       while (count > 0)
4828         {
4829           if (!gtk_text_iter_forward_to_line_end (&end))
4830             break;
4831
4832           --count;
4833         }
4834
4835       /* FIXME figure out what a negative count means
4836          and support that */
4837       break;
4838
4839     case GTK_DELETE_PARAGRAPHS:
4840       if (count > 0)
4841         {
4842           gtk_text_iter_set_line_offset (&start, 0);
4843           gtk_text_iter_forward_to_line_end (&end);
4844
4845           /* Do the lines beyond the first. */
4846           while (count > 1)
4847             {
4848               gtk_text_iter_forward_to_line_end (&end);
4849
4850               --count;
4851             }
4852         }
4853
4854       /* FIXME negative count? */
4855
4856       break;
4857
4858     case GTK_DELETE_WHITESPACE:
4859       {
4860         find_whitepace_region (&insert, &start, &end);
4861       }
4862       break;
4863
4864     default:
4865       break;
4866     }
4867
4868   if (!gtk_text_iter_equal (&start, &end))
4869     {
4870       gtk_text_buffer_begin_user_action (get_buffer (text_view));
4871
4872       if (gtk_text_buffer_delete_interactive (get_buffer (text_view), &start, &end,
4873                                               text_view->editable))
4874         {
4875           if (leave_one)
4876             gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view),
4877                                                           " ", 1,
4878                                                           text_view->editable);
4879         }
4880
4881       gtk_text_buffer_end_user_action (get_buffer (text_view));
4882
4883       DV(g_print (G_STRLOC": scrolling onscreen\n"));
4884       gtk_text_view_scroll_mark_onscreen (text_view,
4885                                           gtk_text_buffer_get_mark (get_buffer (text_view), "insert"));
4886     }
4887 }
4888
4889 static void
4890 gtk_text_view_cut_clipboard (GtkTextView *text_view)
4891 {
4892   gtk_text_buffer_cut_clipboard (get_buffer (text_view),
4893                                  gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
4894                                  text_view->editable);
4895   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4896   gtk_text_view_scroll_mark_onscreen (text_view,
4897                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4898                                                                 "insert"));
4899 }
4900
4901 static void
4902 gtk_text_view_copy_clipboard (GtkTextView *text_view)
4903 {
4904   gtk_text_buffer_copy_clipboard (get_buffer (text_view),
4905                                   gtk_clipboard_get (GDK_SELECTION_CLIPBOARD));
4906   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4907   gtk_text_view_scroll_mark_onscreen (text_view,
4908                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4909                                                                 "insert"));
4910 }
4911
4912 static void
4913 gtk_text_view_paste_clipboard (GtkTextView *text_view)
4914 {
4915   gtk_text_buffer_paste_clipboard (get_buffer (text_view),
4916                                    gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
4917                                    NULL,
4918                                    text_view->editable);
4919   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4920   gtk_text_view_scroll_mark_onscreen (text_view,
4921                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4922                                                                 "insert"));
4923 }
4924
4925 static void
4926 gtk_text_view_toggle_overwrite (GtkTextView *text_view)
4927 {
4928   text_view->overwrite_mode = !text_view->overwrite_mode;
4929 }
4930
4931 static void
4932 gtk_text_view_move_focus (GtkTextView     *text_view,
4933                           GtkDirectionType direction_type)
4934 {
4935   GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (text_view));
4936
4937   if (!GTK_WIDGET_TOPLEVEL (toplevel))
4938     return;
4939
4940   /* Propagate to toplevel */
4941   g_signal_emit_by_name (G_OBJECT (toplevel), "move_focus", direction_type);
4942 }
4943
4944 /*
4945  * Selections
4946  */
4947
4948 static void
4949 gtk_text_view_unselect (GtkTextView *text_view)
4950 {
4951   GtkTextIter insert;
4952
4953   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4954                                     &insert,
4955                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4956                                                               "insert"));
4957
4958   gtk_text_buffer_move_mark (get_buffer (text_view),
4959                              gtk_text_buffer_get_mark (get_buffer (text_view),
4960                                                        "selection_bound"),
4961                              &insert);
4962 }
4963
4964 static void
4965 move_mark_to_pointer_and_scroll (GtkTextView *text_view,
4966                                  const gchar *mark_name)
4967 {
4968   gint x, y;
4969   GdkModifierType state;
4970   GtkTextIter newplace;
4971
4972   /*   DV(g_print (G_STRLOC": begin\n")); */
4973
4974   gdk_window_get_pointer (text_view->text_window->bin_window,
4975                           &x, &y, &state);
4976
4977   /*   DV(g_print (G_STRLOC": get iter at pixel\n"); */
4978   gtk_text_layout_get_iter_at_pixel (text_view->layout,
4979                                      &newplace,
4980                                      x + text_view->xoffset,
4981                                      y + text_view->yoffset);
4982
4983   {
4984     GtkTextMark *mark =
4985       gtk_text_buffer_get_mark (get_buffer (text_view), mark_name);
4986
4987     /* This may invalidate the layout */
4988     DV(g_print (G_STRLOC": move mark\n"));
4989     gtk_text_buffer_move_mark (get_buffer (text_view),
4990                                mark,
4991                                &newplace);
4992
4993     DV(g_print (G_STRLOC": scrolling onscreen\n"));
4994     gtk_text_view_scroll_mark_onscreen (text_view, mark);
4995   }
4996
4997   DV (g_print ("first validate idle leaving %s is %d\n",
4998                G_STRLOC, text_view->first_validate_idle));
4999 }
5000
5001 static gint
5002 selection_scan_timeout (gpointer data)
5003 {
5004   GtkTextView *text_view;
5005
5006   GDK_THREADS_ENTER ();
5007
5008   text_view = GTK_TEXT_VIEW (data);
5009
5010   DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
5011   move_mark_to_pointer_and_scroll (text_view, "insert");
5012
5013   GDK_THREADS_LEAVE ();
5014
5015   return TRUE; /* remain installed. */
5016 }
5017
5018 #define DND_SCROLL_MARGIN 0.20
5019
5020 static gint
5021 drag_scan_timeout (gpointer data)
5022 {
5023   GtkTextView *text_view;
5024   gint x, y;
5025   GdkModifierType state;
5026   GtkTextIter newplace;
5027
5028   GDK_THREADS_ENTER ();
5029
5030   text_view = GTK_TEXT_VIEW (data);
5031
5032   gdk_window_get_pointer (text_view->text_window->bin_window,
5033                           &x, &y, &state);
5034
5035   gtk_text_layout_get_iter_at_pixel (text_view->layout,
5036                                      &newplace,
5037                                      x + text_view->xoffset,
5038                                      y + text_view->yoffset);
5039
5040   gtk_text_buffer_move_mark (get_buffer (text_view),
5041                              text_view->dnd_mark,
5042                              &newplace);
5043
5044   DV(g_print (G_STRLOC": scrolling onscreen\n"));
5045   gtk_text_view_scroll_to_mark (text_view,
5046                                 text_view->dnd_mark,
5047                                 DND_SCROLL_MARGIN, FALSE, 0.0, 0.0);
5048
5049   GDK_THREADS_LEAVE ();
5050
5051   return TRUE;
5052 }
5053
5054 static gint
5055 selection_motion_event_handler (GtkTextView *text_view, GdkEventMotion *event, gpointer data)
5056 {
5057   DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
5058   move_mark_to_pointer_and_scroll (text_view, "insert");
5059
5060   /* If we had to scroll offscreen, insert a timeout to do so
5061    * again. Note that in the timeout, even if the mouse doesn't
5062    * move, due to this scroll xoffset/yoffset will have changed
5063    * and we'll need to scroll again.
5064    */
5065   if (text_view->scroll_timeout != 0) /* reset on every motion event */
5066     gtk_timeout_remove (text_view->scroll_timeout);
5067
5068   text_view->scroll_timeout =
5069     gtk_timeout_add (50, selection_scan_timeout, text_view);
5070
5071   return TRUE;
5072 }
5073
5074 static void
5075 gtk_text_view_start_selection_drag (GtkTextView       *text_view,
5076                                     const GtkTextIter *iter,
5077                                     GdkEventButton    *button)
5078 {
5079   GtkTextIter newplace;
5080   GtkTextBuffer *buffer;
5081
5082   g_return_if_fail (text_view->selection_drag_handler == 0);
5083
5084   gtk_grab_add (GTK_WIDGET (text_view));
5085
5086   buffer = get_buffer (text_view);
5087
5088   newplace = *iter;
5089
5090   if (button->state & GDK_SHIFT_MASK)
5091     {
5092       /* Extend selection */
5093       GtkTextIter start, end;
5094
5095       gtk_text_buffer_get_selection_bounds (buffer, &start, &end);
5096
5097       if (gtk_text_iter_compare (&newplace, &start) <= 0)
5098         {
5099           gtk_text_buffer_move_mark_by_name (buffer, "insert",
5100                                              &newplace);
5101
5102           gtk_text_buffer_move_mark_by_name (buffer, "selection_bound",
5103                                              &end);
5104         }
5105       else if (gtk_text_iter_compare (&newplace, &end) >= 0)
5106         {
5107           gtk_text_buffer_move_mark_by_name (buffer, "insert",
5108                                              &newplace);
5109
5110           gtk_text_buffer_move_mark_by_name (buffer, "selection_bound",
5111                                              &start);
5112         }
5113     }
5114   else
5115     {
5116       /* Replace selection */
5117       gtk_text_buffer_place_cursor (buffer, &newplace);
5118     }
5119
5120   text_view->selection_drag_handler = gtk_signal_connect (GTK_OBJECT (text_view),
5121                                                           "motion_notify_event",
5122                                                           GTK_SIGNAL_FUNC (selection_motion_event_handler),
5123                                                           NULL);
5124 }
5125
5126 /* returns whether we were really dragging */
5127 static gboolean
5128 gtk_text_view_end_selection_drag (GtkTextView *text_view, GdkEventButton *event)
5129 {
5130   if (text_view->selection_drag_handler == 0)
5131     return FALSE;
5132
5133   gtk_signal_disconnect (GTK_OBJECT (text_view), text_view->selection_drag_handler);
5134   text_view->selection_drag_handler = 0;
5135
5136   if (text_view->scroll_timeout != 0)
5137     {
5138       gtk_timeout_remove (text_view->scroll_timeout);
5139       text_view->scroll_timeout = 0;
5140     }
5141
5142   /* one last update to current position */
5143   DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
5144   move_mark_to_pointer_and_scroll (text_view, "insert");
5145
5146   gtk_grab_remove (GTK_WIDGET (text_view));
5147
5148   return TRUE;
5149 }
5150
5151 /*
5152  * Layout utils
5153  */
5154
5155 static void
5156 gtk_text_view_set_attributes_from_style (GtkTextView        *text_view,
5157                                          GtkTextAttributes  *values,
5158                                          GtkStyle           *style)
5159 {
5160   values->appearance.bg_color = style->base[GTK_STATE_NORMAL];
5161   values->appearance.fg_color = style->text[GTK_STATE_NORMAL];
5162
5163   if (values->font)
5164     pango_font_description_free (values->font);
5165
5166   values->font = pango_font_description_copy (style->font_desc);
5167 }
5168
5169 static void
5170 gtk_text_view_check_keymap_direction (GtkTextView *text_view)
5171 {
5172   if (text_view->layout)
5173     {
5174       gboolean split_cursor;
5175       GtkTextDirection new_dir;
5176       GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
5177
5178       g_object_get (G_OBJECT (settings),
5179                     "gtk-split-cursor", &split_cursor,
5180                     NULL);
5181       if (split_cursor)
5182         new_dir = GTK_TEXT_DIR_NONE;
5183       else
5184         new_dir = (gdk_keymap_get_direction (gdk_keymap_get_default ()) == PANGO_DIRECTION_LTR) ?
5185           GTK_TEXT_DIR_LTR : GTK_TEXT_DIR_RTL;
5186
5187       if (text_view->layout->cursor_direction != new_dir)
5188         gtk_text_layout_set_cursor_direction (text_view->layout, new_dir);
5189     }
5190 }
5191
5192 static void
5193 gtk_text_view_ensure_layout (GtkTextView *text_view)
5194 {
5195   GtkWidget *widget;
5196
5197   widget = GTK_WIDGET (text_view);
5198
5199   if (text_view->layout == NULL)
5200     {
5201       GtkTextAttributes *style;
5202       PangoContext *ltr_context, *rtl_context;
5203       GSList *tmp_list;
5204
5205       DV(g_print(G_STRLOC"\n"));
5206
5207       text_view->layout = gtk_text_layout_new ();
5208
5209       g_signal_connect (G_OBJECT (text_view->layout),
5210                         "invalidated",
5211                         G_CALLBACK (invalidated_handler),
5212                         text_view);
5213
5214       g_signal_connect (G_OBJECT (text_view->layout),
5215                         "changed",
5216                         G_CALLBACK (changed_handler),
5217                         text_view);
5218
5219       g_signal_connect (G_OBJECT (text_view->layout),
5220                         "allocate_child",
5221                         G_CALLBACK (gtk_text_view_child_allocated),
5222                         text_view);
5223
5224       if (get_buffer (text_view))
5225         gtk_text_layout_set_buffer (text_view->layout, get_buffer (text_view));
5226
5227       if ((GTK_WIDGET_HAS_FOCUS (text_view) && text_view->cursor_visible))
5228         gtk_text_view_pend_cursor_blink (text_view);
5229       else
5230         gtk_text_layout_set_cursor_visible (text_view->layout, FALSE);
5231
5232       ltr_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
5233       pango_context_set_base_dir (ltr_context, PANGO_DIRECTION_LTR);
5234       rtl_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
5235       pango_context_set_base_dir (rtl_context, PANGO_DIRECTION_RTL);
5236
5237       gtk_text_layout_set_contexts (text_view->layout, ltr_context, rtl_context);
5238
5239       g_object_unref (G_OBJECT (ltr_context));
5240       g_object_unref (G_OBJECT (rtl_context));
5241
5242       gtk_text_view_check_keymap_direction (text_view);
5243
5244       style = gtk_text_attributes_new ();
5245
5246       gtk_widget_ensure_style (widget);
5247       gtk_text_view_set_attributes_from_style (text_view,
5248                                                style, widget->style);
5249
5250       style->pixels_above_lines = text_view->pixels_above_lines;
5251       style->pixels_below_lines = text_view->pixels_below_lines;
5252       style->pixels_inside_wrap = text_view->pixels_inside_wrap;
5253       style->left_margin = text_view->left_margin;
5254       style->right_margin = text_view->right_margin;
5255       style->indent = text_view->indent;
5256       style->tabs = text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
5257
5258       style->wrap_mode = text_view->wrap_mode;
5259       style->justification = text_view->justify;
5260       style->direction = gtk_widget_get_direction (GTK_WIDGET (text_view));
5261
5262       gtk_text_layout_set_default_style (text_view->layout, style);
5263
5264       gtk_text_attributes_unref (style);
5265
5266       /* Set layout for all anchored children */
5267
5268       tmp_list = text_view->children;
5269       while (tmp_list != NULL)
5270         {
5271           GtkTextViewChild *vc = tmp_list->data;
5272
5273           if (vc->anchor)
5274             {
5275               gtk_text_anchored_child_set_layout (vc->widget,
5276                                                   text_view->layout);
5277               /* vc may now be invalid! */
5278             }
5279
5280           tmp_list = g_slist_next (tmp_list);
5281         }
5282     }
5283 }
5284
5285 /**
5286  * gtk_text_view_get_default_attributes:
5287  * @text_view: a #GtkTextView
5288  *
5289  * Obtains a copy of the default text attributes. These are the
5290  * attributes used for text unless a tag overrides them.
5291  * You'd typically pass the default attributes in to
5292  * gtk_text_iter_get_attributes() in order to get the
5293  * attributes in effect at a given text position.
5294  *
5295  * The return value is a copy owned by the caller of this function,
5296  * and should be freed.
5297  *
5298  * Return value: a new #GtkTextAttributes
5299  **/
5300 GtkTextAttributes*
5301 gtk_text_view_get_default_attributes (GtkTextView *text_view)
5302 {
5303   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
5304
5305   gtk_text_view_ensure_layout (text_view);
5306
5307   return gtk_text_attributes_copy (text_view->layout->default_style);
5308 }
5309
5310 static void
5311 gtk_text_view_destroy_layout (GtkTextView *text_view)
5312 {
5313   if (text_view->layout)
5314     {
5315       GSList *tmp_list;
5316
5317       gtk_text_view_remove_validate_idles (text_view);
5318
5319       /* Remove layout from all anchored children */
5320       tmp_list = text_view->children;
5321       while (tmp_list != NULL)
5322         {
5323           GtkTextViewChild *vc = tmp_list->data;
5324
5325           if (vc->anchor)
5326             {
5327               gtk_text_anchored_child_set_layout (vc->widget, NULL);
5328               /* vc may now be invalid! */
5329             }
5330
5331           tmp_list = g_slist_next (tmp_list);
5332         }
5333
5334       gtk_text_view_stop_cursor_blink (text_view);
5335       gtk_text_view_end_selection_drag (text_view, NULL);
5336
5337       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->layout),
5338                                             invalidated_handler, text_view);
5339       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->layout),
5340                                             changed_handler, text_view);
5341       g_object_unref (G_OBJECT (text_view->layout));
5342       text_view->layout = NULL;
5343     }
5344 }
5345
5346 static void
5347 gtk_text_view_reset_im_context (GtkTextView *text_view)
5348 {
5349   if (text_view->need_im_reset)
5350     {
5351       text_view->need_im_reset = FALSE;
5352       gtk_im_context_reset (text_view->im_context);
5353     }
5354 }
5355
5356 /*
5357  * DND feature
5358  */
5359
5360 static void
5361 gtk_text_view_start_selection_dnd (GtkTextView       *text_view,
5362                                    const GtkTextIter *iter,
5363                                    GdkEventMotion    *event)
5364 {
5365   GdkDragContext *context;
5366   GtkTargetList *target_list;
5367
5368   text_view->drag_start_x = -1;
5369   text_view->drag_start_y = -1;
5370   text_view->pending_place_cursor_button = 0;
5371
5372   target_list = gtk_target_list_new (target_table,
5373                                      G_N_ELEMENTS (target_table));
5374
5375   context = gtk_drag_begin (GTK_WIDGET (text_view), target_list,
5376                             GDK_ACTION_COPY | GDK_ACTION_MOVE,
5377                             1, (GdkEvent*)event);
5378
5379   gtk_target_list_unref (target_list);
5380
5381   gtk_drag_set_icon_default (context);
5382 }
5383
5384 static void
5385 gtk_text_view_drag_begin (GtkWidget        *widget,
5386                           GdkDragContext   *context)
5387 {
5388   /* do nothing */
5389 }
5390
5391 static void
5392 gtk_text_view_drag_end (GtkWidget        *widget,
5393                         GdkDragContext   *context)
5394 {
5395   GtkTextView *text_view;
5396
5397   text_view = GTK_TEXT_VIEW (widget);
5398 }
5399
5400 static void
5401 gtk_text_view_drag_data_get (GtkWidget        *widget,
5402                              GdkDragContext   *context,
5403                              GtkSelectionData *selection_data,
5404                              guint             info,
5405                              guint             time)
5406 {
5407   GtkTextView *text_view;
5408
5409   text_view = GTK_TEXT_VIEW (widget);
5410
5411   if (selection_data->target == gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE))
5412     {
5413       GtkTextBuffer *buffer = gtk_text_view_get_buffer (text_view);
5414
5415       gtk_selection_data_set (selection_data,
5416                               gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE),
5417                               8, /* bytes */
5418                               (void*)&buffer,
5419                               sizeof (buffer));
5420     }
5421   else
5422     {
5423       gchar *str;
5424       GtkTextIter start;
5425       GtkTextIter end;
5426
5427       str = NULL;
5428
5429       if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
5430                                                 &start, &end))
5431         {
5432           /* Extract the selected text */
5433           str = gtk_text_iter_get_visible_text (&start, &end);
5434         }
5435
5436       if (str)
5437         {
5438           gtk_selection_data_set_text (selection_data, str, -1);
5439           g_free (str);
5440         }
5441     }
5442 }
5443
5444 static void
5445 gtk_text_view_drag_data_delete (GtkWidget        *widget,
5446                                 GdkDragContext   *context)
5447 {
5448   GtkTextView *text_view;
5449
5450   text_view = GTK_TEXT_VIEW (widget);
5451
5452   gtk_text_buffer_delete_selection (GTK_TEXT_VIEW (widget)->buffer,
5453                                     TRUE, GTK_TEXT_VIEW (widget)->editable);
5454 }
5455
5456 static void
5457 gtk_text_view_drag_leave (GtkWidget        *widget,
5458                           GdkDragContext   *context,
5459                           guint             time)
5460 {
5461   GtkTextView *text_view;
5462
5463   text_view = GTK_TEXT_VIEW (widget);
5464
5465   gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
5466
5467   if (text_view->scroll_timeout != 0)
5468     gtk_timeout_remove (text_view->scroll_timeout);
5469
5470   text_view->scroll_timeout = 0;
5471 }
5472
5473 static gboolean
5474 gtk_text_view_drag_motion (GtkWidget        *widget,
5475                            GdkDragContext   *context,
5476                            gint              x,
5477                            gint              y,
5478                            guint             time)
5479 {
5480   GtkTextIter newplace;
5481   GtkTextView *text_view;
5482   GtkTextIter start;
5483   GtkTextIter end;
5484   GdkRectangle target_rect;
5485   gint bx, by;
5486   GdkDragAction suggested_action = 0;
5487
5488   text_view = GTK_TEXT_VIEW (widget);
5489
5490   target_rect = text_view->text_window->allocation;
5491
5492   if (x < target_rect.x ||
5493       y < target_rect.y ||
5494       x > (target_rect.x + target_rect.width) ||
5495       y > (target_rect.y + target_rect.height))
5496     return FALSE; /* outside the text window, allow parent widgets to handle event */
5497
5498   gtk_text_view_window_to_buffer_coords (text_view,
5499                                          GTK_TEXT_WINDOW_WIDGET,
5500                                          x, y,
5501                                          &bx, &by);
5502
5503   gtk_text_layout_get_iter_at_pixel (text_view->layout,
5504                                      &newplace,
5505                                      bx, by);
5506
5507   if (gtk_drag_dest_find_target (widget, context,
5508                                  gtk_drag_dest_get_target_list (widget)) == GDK_NONE)
5509     {
5510       /* can't accept any of the offered targets */
5511     }
5512   else if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
5513                                             &start, &end) &&
5514            gtk_text_iter_in_range (&newplace, &start, &end))
5515     {
5516       /* We're inside the selection. */
5517     }
5518   else
5519     {
5520       if (gtk_text_iter_can_insert (&newplace, text_view->editable))
5521         {
5522           GtkWidget *source_widget;
5523
5524           suggested_action = context->suggested_action;
5525
5526           source_widget = gtk_drag_get_source_widget (context);
5527
5528           if (source_widget == widget)
5529             {
5530               /* Default to MOVE, unless the user has
5531                * pressed ctrl or alt to affect available actions
5532                */
5533               if ((context->actions & GDK_ACTION_MOVE) != 0)
5534                 suggested_action = GDK_ACTION_MOVE;
5535             }
5536         }
5537       else
5538         {
5539           /* Can't drop here. */
5540         }
5541     }
5542
5543   if (suggested_action != 0)
5544     {
5545       gtk_text_mark_set_visible (text_view->dnd_mark,
5546                                  text_view->cursor_visible);
5547
5548       gdk_drag_status (context, suggested_action, time);
5549     }
5550   else
5551     {
5552       gdk_drag_status (context, 0, time);
5553       gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
5554     }
5555
5556   gtk_text_buffer_move_mark (get_buffer (text_view),
5557                              text_view->dnd_mark,
5558                              &newplace);
5559
5560   DV(g_print (G_STRLOC": scrolling to mark\n"));
5561   gtk_text_view_scroll_to_mark (text_view,
5562                                 text_view->dnd_mark,
5563                                 DND_SCROLL_MARGIN, FALSE, 0.0, 0.0);
5564
5565   if (text_view->scroll_timeout != 0) /* reset on every motion event */
5566     gtk_timeout_remove (text_view->scroll_timeout);
5567
5568   text_view->scroll_timeout =
5569     gtk_timeout_add (50, drag_scan_timeout, text_view);
5570
5571   /* TRUE return means don't propagate the drag motion to parent
5572    * widgets that may also be drop sites.
5573    */
5574   return TRUE;
5575 }
5576
5577 static gboolean
5578 gtk_text_view_drag_drop (GtkWidget        *widget,
5579                          GdkDragContext   *context,
5580                          gint              x,
5581                          gint              y,
5582                          guint             time)
5583 {
5584   GtkTextView *text_view;
5585   GtkTextIter drop_point;
5586   GdkAtom target = GDK_NONE;
5587
5588   text_view = GTK_TEXT_VIEW (widget);
5589
5590   if (text_view->scroll_timeout != 0)
5591     gtk_timeout_remove (text_view->scroll_timeout);
5592
5593   text_view->scroll_timeout = 0;
5594
5595   gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
5596
5597   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
5598                                     &drop_point,
5599                                     text_view->dnd_mark);
5600
5601   if (gtk_text_iter_can_insert (&drop_point, text_view->editable))
5602     target = gtk_drag_dest_find_target (widget, context, NULL);
5603
5604   if (target != GDK_NONE)
5605     gtk_drag_get_data (widget, context, target, time);
5606   else
5607     gtk_drag_finish (context, FALSE, FALSE, time);
5608
5609   return TRUE;
5610 }
5611
5612 static void
5613 insert_text_data (GtkTextView      *text_view,
5614                   GtkTextIter      *drop_point,
5615                   GtkSelectionData *selection_data)
5616 {
5617   gchar *str;
5618
5619   str = gtk_selection_data_get_text (selection_data);
5620
5621   if (str)
5622     {
5623       gtk_text_buffer_insert_interactive (get_buffer (text_view),
5624                                           drop_point, str, -1,
5625                                           text_view->editable);
5626       g_free (str);
5627     }
5628 }
5629
5630 static void
5631 gtk_text_view_drag_data_received (GtkWidget        *widget,
5632                                   GdkDragContext   *context,
5633                                   gint              x,
5634                                   gint              y,
5635                                   GtkSelectionData *selection_data,
5636                                   guint             info,
5637                                   guint             time)
5638 {
5639   GtkTextIter drop_point;
5640   GtkTextView *text_view;
5641   gboolean success = FALSE;
5642
5643   text_view = GTK_TEXT_VIEW (widget);
5644
5645   if (!text_view->dnd_mark)
5646     goto done;
5647
5648   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
5649                                     &drop_point,
5650                                     text_view->dnd_mark);
5651
5652   if (!gtk_text_iter_can_insert (&drop_point, text_view->editable))
5653     goto done;
5654
5655   if (selection_data->target == gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE))
5656     {
5657       GtkTextBuffer *src_buffer = NULL;
5658       GtkTextIter start, end;
5659       gboolean copy_tags = TRUE;
5660
5661       if (selection_data->length != sizeof (src_buffer))
5662         return;
5663
5664       memcpy (&src_buffer, selection_data->data, sizeof (src_buffer));
5665
5666       if (src_buffer == NULL)
5667         return;
5668
5669       g_return_if_fail (GTK_IS_TEXT_BUFFER (src_buffer));
5670
5671       if (gtk_text_buffer_get_tag_table (src_buffer) !=
5672           gtk_text_buffer_get_tag_table (get_buffer (text_view)))
5673         copy_tags = FALSE;
5674
5675       if (gtk_text_buffer_get_selection_bounds (src_buffer,
5676                                                 &start,
5677                                                 &end))
5678         {
5679           if (copy_tags)
5680             gtk_text_buffer_insert_range_interactive (get_buffer (text_view),
5681                                                       &drop_point,
5682                                                       &start,
5683                                                       &end,
5684                                                       text_view->editable);
5685           else
5686             {
5687               gchar *str;
5688
5689               str = gtk_text_iter_get_visible_text (&start, &end);
5690               gtk_text_buffer_insert_interactive (get_buffer (text_view),
5691                                                   &drop_point, str, -1,
5692                                                   text_view->editable);
5693               g_free (str);
5694             }
5695         }
5696     }
5697   else
5698     insert_text_data (text_view, &drop_point, selection_data);
5699
5700   success = TRUE;
5701
5702  done:
5703   gtk_drag_finish (context, success,
5704                    success && context->action == GDK_ACTION_MOVE,
5705                    time);
5706 }
5707
5708 static GtkAdjustment*
5709 get_hadjustment (GtkTextView *text_view)
5710 {
5711   if (text_view->hadjustment == NULL)
5712     gtk_text_view_set_scroll_adjustments (text_view,
5713                                           NULL, /* forces creation */
5714                                           text_view->vadjustment);
5715
5716   return text_view->hadjustment;
5717 }
5718
5719 static GtkAdjustment*
5720 get_vadjustment (GtkTextView *text_view)
5721 {
5722   if (text_view->vadjustment == NULL)
5723     gtk_text_view_set_scroll_adjustments (text_view,
5724                                           text_view->hadjustment,
5725                                           NULL); /* forces creation */
5726   return text_view->vadjustment;
5727 }
5728
5729
5730 static void
5731 gtk_text_view_set_scroll_adjustments (GtkTextView   *text_view,
5732                                       GtkAdjustment *hadj,
5733                                       GtkAdjustment *vadj)
5734 {
5735   gboolean need_adjust = FALSE;
5736
5737   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
5738
5739   if (hadj)
5740     g_return_if_fail (GTK_IS_ADJUSTMENT (hadj));
5741   else
5742     hadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
5743   if (vadj)
5744     g_return_if_fail (GTK_IS_ADJUSTMENT (vadj));
5745   else
5746     vadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
5747
5748   if (text_view->hadjustment && (text_view->hadjustment != hadj))
5749     {
5750       gtk_signal_disconnect_by_data (GTK_OBJECT (text_view->hadjustment), text_view);
5751       g_object_unref (G_OBJECT (text_view->hadjustment));
5752     }
5753
5754   if (text_view->vadjustment && (text_view->vadjustment != vadj))
5755     {
5756       gtk_signal_disconnect_by_data (GTK_OBJECT (text_view->vadjustment), text_view);
5757       g_object_unref (G_OBJECT (text_view->vadjustment));
5758     }
5759
5760   if (text_view->hadjustment != hadj)
5761     {
5762       text_view->hadjustment = hadj;
5763       g_object_ref (G_OBJECT (text_view->hadjustment));
5764       gtk_object_sink (GTK_OBJECT (text_view->hadjustment));
5765
5766       gtk_signal_connect (GTK_OBJECT (text_view->hadjustment), "value_changed",
5767                           (GtkSignalFunc) gtk_text_view_value_changed,
5768                           text_view);
5769       need_adjust = TRUE;
5770     }
5771
5772   if (text_view->vadjustment != vadj)
5773     {
5774       text_view->vadjustment = vadj;
5775       g_object_ref (G_OBJECT (text_view->vadjustment));
5776       gtk_object_sink (GTK_OBJECT (text_view->vadjustment));
5777
5778       gtk_signal_connect (GTK_OBJECT (text_view->vadjustment), "value_changed",
5779                           (GtkSignalFunc) gtk_text_view_value_changed,
5780                           text_view);
5781       need_adjust = TRUE;
5782     }
5783
5784   if (need_adjust)
5785     gtk_text_view_value_changed (NULL, text_view);
5786 }
5787
5788 /* FIXME this adjust_allocation is a big cut-and-paste from
5789  * GtkCList, needs to be some "official" way to do this
5790  * factored out.
5791  */
5792 typedef struct
5793 {
5794   GdkWindow *window;
5795   int dx;
5796   int dy;
5797 } ScrollData;
5798
5799 /* The window to which widget->window is relative */
5800 #define ALLOCATION_WINDOW(widget)               \
5801    (GTK_WIDGET_NO_WINDOW (widget) ?             \
5802     (widget)->window :                          \
5803      gdk_window_get_parent ((widget)->window))
5804
5805 static void
5806 adjust_allocation_recurse (GtkWidget *widget,
5807                            gpointer   data)
5808 {
5809   ScrollData *scroll_data = data;
5810
5811   /* Need to really size allocate instead of just poking
5812    * into widget->allocation if the widget is not realized.
5813    * FIXME someone figure out why this was.
5814    */
5815   if (!GTK_WIDGET_REALIZED (widget))
5816     {
5817       if (GTK_WIDGET_VISIBLE (widget))
5818         {
5819           GdkRectangle tmp_rectangle = widget->allocation;
5820           tmp_rectangle.x += scroll_data->dx;
5821           tmp_rectangle.y += scroll_data->dy;
5822
5823           gtk_widget_size_allocate (widget, &tmp_rectangle);
5824         }
5825     }
5826   else
5827     {
5828       if (ALLOCATION_WINDOW (widget) == scroll_data->window)
5829         {
5830           widget->allocation.x += scroll_data->dx;
5831           widget->allocation.y += scroll_data->dy;
5832
5833           if (GTK_IS_CONTAINER (widget))
5834             gtk_container_forall (GTK_CONTAINER (widget),
5835                                   adjust_allocation_recurse,
5836                                   data);
5837         }
5838     }
5839 }
5840
5841 static void
5842 adjust_allocation (GtkWidget *widget,
5843                    int        dx,
5844                    int        dy)
5845 {
5846   ScrollData scroll_data;
5847
5848   if (GTK_WIDGET_REALIZED (widget))
5849     scroll_data.window = ALLOCATION_WINDOW (widget);
5850   else
5851     scroll_data.window = NULL;
5852
5853   scroll_data.dx = dx;
5854   scroll_data.dy = dy;
5855
5856   adjust_allocation_recurse (widget, &scroll_data);
5857 }
5858
5859 static void
5860 gtk_text_view_value_changed (GtkAdjustment *adj,
5861                              GtkTextView   *text_view)
5862 {
5863   GtkTextIter iter;
5864   gint line_top;
5865   gint dx = 0;
5866   gint dy = 0;
5867
5868   /* Note that we oddly call this function with adj == NULL
5869    * sometimes
5870    */
5871
5872   text_view->onscreen_validated = FALSE;
5873
5874   DV(g_print(">Scroll offset changed %s/%g, onscreen_validated = FALSE ("G_STRLOC")\n",
5875              adj == text_view->hadjustment ? "hadj" : adj == text_view->vadjustment ? "vadj" : "none",
5876              adj ? adj->value : 0.0));
5877
5878   if (adj == text_view->hadjustment)
5879     {
5880       dx = text_view->xoffset - (gint)adj->value;
5881       text_view->xoffset = adj->value;
5882     }
5883   else if (adj == text_view->vadjustment)
5884     {
5885       dy = text_view->yoffset - (gint)adj->value;
5886       text_view->yoffset = adj->value;
5887
5888       if (text_view->layout)
5889         {
5890           gtk_text_layout_get_line_at_y (text_view->layout, &iter, adj->value, &line_top);
5891
5892           gtk_text_buffer_move_mark (get_buffer (text_view), text_view->first_para_mark, &iter);
5893
5894           text_view->first_para_pixels = adj->value - line_top;
5895         }
5896     }
5897
5898   if (dx != 0 || dy != 0)
5899     {
5900       GSList *tmp_list;
5901
5902       if (GTK_WIDGET_REALIZED (text_view))
5903         {
5904           if (dy != 0)
5905             {
5906               if (text_view->left_window)
5907                 text_window_scroll (text_view->left_window, 0, dy);
5908               if (text_view->right_window)
5909                 text_window_scroll (text_view->right_window, 0, dy);
5910             }
5911
5912           if (dx != 0)
5913             {
5914               if (text_view->top_window)
5915                 text_window_scroll (text_view->top_window, dx, 0);
5916               if (text_view->bottom_window)
5917                 text_window_scroll (text_view->bottom_window, dx, 0);
5918             }
5919
5920           /* It looks nicer to scroll the main area last, because
5921            * it takes a while, and making the side areas update
5922            * afterward emphasizes the slowness of scrolling the
5923            * main area.
5924            */
5925           text_window_scroll (text_view->text_window, dx, dy);
5926         }
5927
5928       /* Children are now "moved" in the text window, poke
5929        * into widget->allocation for each child
5930        */
5931       tmp_list = text_view->children;
5932       while (tmp_list != NULL)
5933         {
5934           GtkTextViewChild *child = tmp_list->data;
5935
5936           if (child->anchor)
5937             adjust_allocation (child->widget, dx, dy);
5938
5939           tmp_list = g_slist_next (tmp_list);
5940         }
5941     }
5942
5943   /* This could result in invalidation, which would install the
5944    * first_validate_idle, which would validate onscreen;
5945    * but we're going to go ahead and validate here, so
5946    * first_validate_idle shouldn't have anything to do.
5947    */
5948   gtk_text_view_update_layout_width (text_view);
5949
5950   /* note that validation of onscreen could invoke this function
5951    * recursively, by scrolling to maintain first_para, or in response
5952    * to updating the layout width, however there is no problem with
5953    * that, or shouldn't be.
5954    */
5955   gtk_text_view_validate_onscreen (text_view);
5956
5957   /* process exposes */
5958   if (GTK_WIDGET_REALIZED (text_view))
5959     {
5960       DV (g_print ("Processing updates (%s)\n", G_STRLOC));
5961
5962       if (text_view->left_window)
5963         gdk_window_process_updates (text_view->left_window->bin_window, TRUE);
5964
5965       if (text_view->right_window)
5966         gdk_window_process_updates (text_view->right_window->bin_window, TRUE);
5967
5968       if (text_view->top_window)
5969         gdk_window_process_updates (text_view->top_window->bin_window, TRUE);
5970
5971       if (text_view->bottom_window)
5972         gdk_window_process_updates (text_view->bottom_window->bin_window, TRUE);
5973
5974       gdk_window_process_updates (text_view->text_window->bin_window, TRUE);
5975     }
5976
5977   /* If this got installed, get rid of it, it's just a waste of time. */
5978   if (text_view->first_validate_idle != 0)
5979     {
5980       g_source_remove (text_view->first_validate_idle);
5981       text_view->first_validate_idle = 0;
5982     }
5983
5984   gtk_text_view_update_im_spot_location (text_view);
5985
5986   DV(g_print(">End scroll offset changed handler ("G_STRLOC")\n"));
5987 }
5988
5989 static void
5990 gtk_text_view_commit_handler (GtkIMContext  *context,
5991                               const gchar   *str,
5992                               GtkTextView   *text_view)
5993 {
5994   gtk_text_view_commit_text (text_view, str);
5995 }
5996
5997 static void
5998 gtk_text_view_commit_text (GtkTextView   *text_view,
5999                            const gchar   *str)
6000 {
6001   gboolean had_selection;
6002
6003   gtk_text_buffer_begin_user_action (get_buffer (text_view));
6004
6005   had_selection = gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
6006                                                         NULL, NULL);
6007
6008   gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
6009                                     text_view->editable);
6010
6011   if (!strcmp (str, "\n"))
6012     {
6013       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\n", 1,
6014                                                     text_view->editable);
6015     }
6016   else
6017     {
6018       if (!had_selection && text_view->overwrite_mode)
6019         {
6020           GtkTextIter insert;
6021
6022           gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
6023                                             &insert,
6024                                             gtk_text_buffer_get_mark (get_buffer (text_view),
6025                                                                       "insert"));
6026           if (!gtk_text_iter_ends_line (&insert))
6027             gtk_text_view_delete_from_cursor (text_view, GTK_DELETE_CHARS, 1);
6028         }
6029       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
6030                                                     text_view->editable);
6031     }
6032
6033   gtk_text_buffer_end_user_action (get_buffer (text_view));
6034
6035   DV(g_print (G_STRLOC": scrolling onscreen\n"));
6036   gtk_text_view_scroll_mark_onscreen (text_view,
6037                                       gtk_text_buffer_get_mark (get_buffer (text_view),
6038                                                                 "insert"));
6039 }
6040
6041 static void
6042 gtk_text_view_preedit_changed_handler (GtkIMContext *context,
6043                                        GtkTextView  *text_view)
6044 {
6045   gchar *str;
6046   PangoAttrList *attrs;
6047   gint cursor_pos;
6048
6049   gtk_im_context_get_preedit_string (context, &str, &attrs, &cursor_pos);
6050   gtk_text_layout_set_preedit_string (text_view->layout, str, attrs, cursor_pos);
6051
6052   pango_attr_list_unref (attrs);
6053   g_free (str);
6054 }
6055
6056 static gboolean
6057 gtk_text_view_retrieve_surrounding_handler (GtkIMContext  *context,
6058                                             GtkTextView   *text_view)
6059 {
6060   GtkTextIter start;
6061   GtkTextIter end;
6062   gint pos;
6063   gchar *text;
6064
6065   gtk_text_buffer_get_iter_at_mark (text_view->buffer, &start,
6066                                     gtk_text_buffer_get_insert (text_view->buffer));
6067   end = start;
6068
6069   pos = gtk_text_iter_get_line_index (&start);
6070   gtk_text_iter_set_line_offset (&start, 0);
6071   gtk_text_iter_forward_to_line_end (&end);
6072
6073   text = gtk_text_iter_get_slice (&start, &end);
6074   gtk_im_context_set_surrounding (context, text, -1, pos);
6075   g_free (text);
6076
6077   return TRUE;
6078 }
6079
6080 static gboolean
6081 gtk_text_view_delete_surrounding_handler (GtkIMContext  *context,
6082                                           gint           offset,
6083                                           gint           n_chars,
6084                                           GtkTextView   *text_view)
6085 {
6086   GtkTextIter start;
6087   GtkTextIter end;
6088
6089   gtk_text_buffer_get_iter_at_mark (text_view->buffer, &start,
6090                                     gtk_text_buffer_get_insert (text_view->buffer));
6091   end = start;
6092
6093   gtk_text_iter_forward_chars (&start, offset);
6094   gtk_text_iter_forward_chars (&end, offset + n_chars);
6095
6096   gtk_text_buffer_delete (text_view->buffer, &start, &end);
6097
6098   return TRUE;
6099 }
6100
6101 static void
6102 gtk_text_view_mark_set_handler (GtkTextBuffer     *buffer,
6103                                 const GtkTextIter *location,
6104                                 GtkTextMark       *mark,
6105                                 gpointer           data)
6106 {
6107   GtkTextView *text_view = GTK_TEXT_VIEW (data);
6108   gboolean need_reset = FALSE;
6109
6110   if (mark == gtk_text_buffer_get_insert (buffer))
6111     {
6112       text_view->virtual_cursor_x = -1;
6113       text_view->virtual_cursor_y = -1;
6114       gtk_text_view_update_im_spot_location (text_view);
6115       need_reset = TRUE;
6116     }
6117   else if (mark == gtk_text_buffer_get_selection_bound (buffer))
6118     {
6119       need_reset = TRUE;
6120     }
6121
6122   if (need_reset)
6123     gtk_text_view_reset_im_context (text_view);
6124 }
6125
6126 static void
6127 gtk_text_view_get_virtual_cursor_pos (GtkTextView *text_view,
6128                                       gint        *x,
6129                                       gint        *y)
6130 {
6131   GdkRectangle strong_pos;
6132   GtkTextIter insert;
6133
6134   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
6135                                     gtk_text_buffer_get_mark (get_buffer (text_view),
6136                                                               "insert"));
6137
6138   if ((x && text_view->virtual_cursor_x == -1) ||
6139       (y && text_view->virtual_cursor_y == -1))
6140     gtk_text_layout_get_cursor_locations (text_view->layout, &insert, &strong_pos, NULL);
6141
6142   if (x)
6143     {
6144       if (text_view->virtual_cursor_x != -1)
6145         *x = text_view->virtual_cursor_x;
6146       else
6147         *x = strong_pos.x;
6148     }
6149
6150   if (y)
6151     {
6152       if (text_view->virtual_cursor_x != -1)
6153         *y = text_view->virtual_cursor_y;
6154       else
6155         *y = strong_pos.y + strong_pos.height / 2;
6156     }
6157 }
6158
6159 static void
6160 gtk_text_view_set_virtual_cursor_pos (GtkTextView *text_view,
6161                                       gint         x,
6162                                       gint         y)
6163 {
6164   GdkRectangle strong_pos;
6165   GtkTextIter insert;
6166
6167   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
6168                                     gtk_text_buffer_get_mark (get_buffer (text_view),
6169                                                               "insert"));
6170
6171   if (x == -1 || y == -1)
6172     gtk_text_layout_get_cursor_locations (text_view->layout, &insert, &strong_pos, NULL);
6173
6174   text_view->virtual_cursor_x = (x == -1) ? strong_pos.x : x;
6175   text_view->virtual_cursor_y = (y == -1) ? strong_pos.y + strong_pos.height / 2 : y;
6176 }
6177
6178 /* Quick hack of a popup menu
6179  */
6180 static void
6181 activate_cb (GtkWidget   *menuitem,
6182              GtkTextView *text_view)
6183 {
6184   const gchar *signal = g_object_get_data (G_OBJECT (menuitem), "gtk-signal");
6185   gtk_signal_emit_by_name (GTK_OBJECT (text_view), signal);
6186 }
6187
6188 static void
6189 append_action_signal (GtkTextView  *text_view,
6190                       GtkWidget    *menu,
6191                       const gchar  *stock_id,
6192                       const gchar  *signal,
6193                       gboolean      sensitive)
6194 {
6195   GtkWidget *menuitem = gtk_image_menu_item_new_from_stock (stock_id, NULL);
6196
6197   g_object_set_data (G_OBJECT (menuitem), "gtk-signal", (char *)signal);
6198   gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
6199                       GTK_SIGNAL_FUNC (activate_cb), text_view);
6200
6201   gtk_widget_set_sensitive (menuitem, sensitive);
6202
6203   gtk_widget_show (menuitem);
6204   gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
6205 }
6206
6207 static void
6208 popup_menu_detach (GtkWidget *attach_widget,
6209                    GtkMenu   *menu)
6210 {
6211   GTK_TEXT_VIEW (attach_widget)->popup_menu = NULL;
6212 }
6213
6214 static void
6215 popup_position_func (GtkMenu   *menu,
6216                      gint      *x,
6217                      gint      *y,
6218                      gboolean  *push_in,
6219                      gpointer   user_data)
6220 {
6221   GtkTextView *text_view;
6222   GtkWidget *widget;
6223   GdkRectangle cursor_rect;
6224   GdkRectangle onscreen_rect;
6225   gint root_x, root_y;
6226   GtkTextIter iter;
6227   GtkRequisition req;
6228
6229   text_view = GTK_TEXT_VIEW (user_data);
6230   widget = GTK_WIDGET (text_view);
6231
6232   g_return_if_fail (GTK_WIDGET_REALIZED (text_view));
6233
6234   gdk_window_get_origin (widget->window, &root_x, &root_y);
6235
6236   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
6237                                     &iter,
6238                                     gtk_text_buffer_get_insert (get_buffer (text_view)));
6239
6240   gtk_text_view_get_iter_location (text_view,
6241                                    &iter,
6242                                    &cursor_rect);
6243
6244   gtk_text_view_get_visible_rect (text_view, &onscreen_rect);
6245
6246   gtk_widget_size_request (text_view->popup_menu, &req);
6247
6248   /* can't use rectangle_intersect since cursor rect can have 0 width */
6249   if (cursor_rect.x >= onscreen_rect.x &&
6250       cursor_rect.x < onscreen_rect.x + onscreen_rect.width &&
6251       cursor_rect.y >= onscreen_rect.y &&
6252       cursor_rect.y < onscreen_rect.y + onscreen_rect.height)
6253     {
6254       gtk_text_view_buffer_to_window_coords (text_view,
6255                                              GTK_TEXT_WINDOW_WIDGET,
6256                                              cursor_rect.x, cursor_rect.y,
6257                                              &cursor_rect.x, &cursor_rect.y);
6258
6259       *x = root_x + cursor_rect.x + cursor_rect.width;
6260       *y = root_y + cursor_rect.y + cursor_rect.height;
6261     }
6262   else
6263     {
6264       /* Just center the menu, since cursor is offscreen. */
6265       *x = root_x + (widget->allocation.width / 2 - req.width / 2);
6266       *y = root_y + (widget->allocation.height / 2 - req.height / 2);
6267     }
6268
6269   /* Ensure sanity */
6270   *x = CLAMP (*x, root_x, (root_x + widget->allocation.width));
6271   *y = CLAMP (*y, root_y, (root_y + widget->allocation.height));
6272
6273   *x = CLAMP (*x, 0, MAX (0, gdk_screen_width () - req.width));
6274   *y = CLAMP (*y, 0, MAX (0, gdk_screen_height () - req.height));
6275 }
6276
6277 typedef struct
6278 {
6279   GtkTextView *text_view;
6280   gint button;
6281   guint time;
6282 } PopupInfo;
6283
6284 static gboolean
6285 range_contains_editable_text (const GtkTextIter *start,
6286                               const GtkTextIter *end,
6287                               gboolean default_editability)
6288 {
6289   GtkTextIter iter = *start;
6290
6291   while (gtk_text_iter_compare (&iter, end) < 0)
6292     {
6293       if (gtk_text_iter_editable (&iter, default_editability))
6294         return TRUE;
6295
6296       gtk_text_iter_forward_to_tag_toggle (&iter, NULL);
6297     }
6298
6299   return FALSE;
6300 }
6301
6302 static void
6303 unichar_chosen_func (const char *text,
6304                      gpointer    data)
6305 {
6306   GtkTextView *text_view = GTK_TEXT_VIEW (data);
6307
6308   gtk_text_view_commit_text (text_view, text);
6309 }
6310
6311 static void
6312 popup_targets_received (GtkClipboard     *clipboard,
6313                         GtkSelectionData *data,
6314                         gpointer          user_data)
6315 {
6316   PopupInfo *info = user_data;
6317   GtkTextView *text_view = info->text_view;
6318
6319   if (GTK_WIDGET_REALIZED (text_view))
6320     {
6321       /* We implicitely rely here on the fact that if we are pasting ourself, we'll
6322        * have text targets as well as the private GTK_TEXT_BUFFER_CONTENTS target.
6323        */
6324       gboolean clipboard_contains_text = gtk_selection_data_targets_include_text (data);
6325       GtkWidget *menuitem;
6326       GtkWidget *submenu;
6327       gboolean have_selection;
6328       gboolean can_insert;
6329       GtkTextIter iter;
6330       GtkTextIter sel_start, sel_end;
6331
6332       if (text_view->popup_menu)
6333         gtk_widget_destroy (text_view->popup_menu);
6334
6335       text_view->popup_menu = gtk_menu_new ();
6336
6337       gtk_menu_attach_to_widget (GTK_MENU (text_view->popup_menu),
6338                                  GTK_WIDGET (text_view),
6339                                  popup_menu_detach);
6340
6341       have_selection = gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
6342                                                              &sel_start, &sel_end);
6343
6344       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
6345                                         &iter,
6346                                         gtk_text_buffer_get_insert (get_buffer (text_view)));
6347
6348       can_insert = gtk_text_iter_can_insert (&iter, text_view->editable);
6349
6350       append_action_signal (text_view, text_view->popup_menu, GTK_STOCK_CUT, "cut_clipboard",
6351                             have_selection &&
6352                             range_contains_editable_text (&sel_start, &sel_end,
6353                                                           text_view->editable));
6354       append_action_signal (text_view, text_view->popup_menu, GTK_STOCK_COPY, "copy_clipboard",
6355                             have_selection);
6356       append_action_signal (text_view, text_view->popup_menu, GTK_STOCK_PASTE, "paste_clipboard",
6357                             can_insert && clipboard_contains_text);
6358
6359       menuitem = gtk_separator_menu_item_new ();
6360       gtk_widget_show (menuitem);
6361       gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
6362
6363       menuitem = gtk_menu_item_new_with_mnemonic (_("Input _Methods"));
6364       gtk_widget_show (menuitem);
6365       submenu = gtk_menu_new ();
6366       gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), submenu);
6367       gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
6368
6369       gtk_im_multicontext_append_menuitems (GTK_IM_MULTICONTEXT (text_view->im_context),
6370                                             GTK_MENU_SHELL (submenu));
6371
6372       menuitem = gtk_menu_item_new_with_mnemonic (_("_Insert Unicode control character"));
6373       gtk_widget_show (menuitem);
6374       gtk_widget_set_sensitive (menuitem, can_insert);
6375
6376       submenu = gtk_menu_new ();
6377       gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), submenu);
6378       gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
6379
6380       _gtk_text_util_append_special_char_menuitems (GTK_MENU_SHELL (submenu),
6381                                                     unichar_chosen_func,
6382                                                     text_view);
6383
6384       gtk_signal_emit (GTK_OBJECT (text_view),
6385                        signals[POPULATE_POPUP],
6386                        text_view->popup_menu);
6387
6388       if (info->button)
6389         gtk_menu_popup (GTK_MENU (text_view->popup_menu), NULL, NULL,
6390                         NULL, NULL,
6391                         info->button, info->time);
6392       else
6393         {
6394           gtk_menu_popup (GTK_MENU (text_view->popup_menu), NULL, NULL,
6395                           popup_position_func, text_view,
6396                           0, gtk_get_current_event_time ());
6397           _gtk_menu_shell_select_first (GTK_MENU_SHELL (text_view->popup_menu));
6398         }
6399     }
6400
6401   g_object_unref (text_view);
6402   g_free (info);
6403 }
6404
6405 static void
6406 gtk_text_view_do_popup (GtkTextView    *text_view,
6407                         GdkEventButton *event)
6408 {
6409   PopupInfo *info = g_new (PopupInfo, 1);
6410
6411   /* In order to know what entries we should make sensitive, we
6412    * ask for the current targets of the clipboard, and when
6413    * we get them, then we actually pop up the menu.
6414    */
6415   info->text_view = g_object_ref (text_view);
6416
6417   if (event)
6418     {
6419       info->button = event->button;
6420       info->time = event->time;
6421     }
6422   else
6423     {
6424       info->button = 0;
6425       info->time = gtk_get_current_event_time ();
6426     }
6427
6428   gtk_clipboard_request_contents (gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
6429                                   gdk_atom_intern ("TARGETS", FALSE),
6430                                   popup_targets_received,
6431                                   info);
6432 }
6433
6434 static gboolean
6435 gtk_text_view_popup_menu (GtkWidget *widget)
6436 {
6437   gtk_text_view_do_popup (GTK_TEXT_VIEW (widget), NULL);
6438   return TRUE;
6439 }
6440
6441 /* Child GdkWindows */
6442
6443
6444 static GtkTextWindow*
6445 text_window_new (GtkTextWindowType  type,
6446                  GtkWidget         *widget,
6447                  gint               width_request,
6448                  gint               height_request)
6449 {
6450   GtkTextWindow *win;
6451
6452   win = g_new (GtkTextWindow, 1);
6453
6454   win->type = type;
6455   win->widget = widget;
6456   win->window = NULL;
6457   win->bin_window = NULL;
6458   win->requisition.width = width_request;
6459   win->requisition.height = height_request;
6460   win->allocation.width = width_request;
6461   win->allocation.height = height_request;
6462   win->allocation.x = 0;
6463   win->allocation.y = 0;
6464
6465   return win;
6466 }
6467
6468 static void
6469 text_window_free (GtkTextWindow *win)
6470 {
6471   if (win->window)
6472     text_window_unrealize (win);
6473
6474   g_free (win);
6475 }
6476
6477 static void
6478 text_window_realize (GtkTextWindow *win,
6479                      GdkWindow     *parent)
6480 {
6481   GdkWindowAttr attributes;
6482   gint attributes_mask;
6483   GdkCursor *cursor;
6484
6485   attributes.window_type = GDK_WINDOW_CHILD;
6486   attributes.x = win->allocation.x;
6487   attributes.y = win->allocation.y;
6488   attributes.width = win->allocation.width;
6489   attributes.height = win->allocation.height;
6490   attributes.wclass = GDK_INPUT_OUTPUT;
6491   attributes.visual = gtk_widget_get_visual (win->widget);
6492   attributes.colormap = gtk_widget_get_colormap (win->widget);
6493   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK;
6494
6495   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
6496
6497   win->window = gdk_window_new (parent,
6498                                 &attributes,
6499                                 attributes_mask);
6500
6501   gdk_window_show (win->window);
6502   gdk_window_set_user_data (win->window, win->widget);
6503
6504   attributes.x = 0;
6505   attributes.y = 0;
6506   attributes.width = win->allocation.width;
6507   attributes.height = win->allocation.height;
6508   attributes.event_mask = (GDK_EXPOSURE_MASK            |
6509                            GDK_SCROLL_MASK              |
6510                            GDK_KEY_PRESS_MASK           |
6511                            GDK_BUTTON_PRESS_MASK        |
6512                            GDK_BUTTON_RELEASE_MASK      |
6513                            GDK_POINTER_MOTION_MASK      |
6514                            GDK_POINTER_MOTION_HINT_MASK |
6515                            gtk_widget_get_events (win->widget));
6516
6517   win->bin_window = gdk_window_new (win->window,
6518                                     &attributes,
6519                                     attributes_mask);
6520
6521   gdk_window_show (win->bin_window);
6522   gdk_window_set_user_data (win->bin_window, win->widget);
6523
6524   if (win->type == GTK_TEXT_WINDOW_TEXT)
6525     {
6526       /* I-beam cursor */
6527       cursor = gdk_cursor_new (GDK_XTERM);
6528       gdk_window_set_cursor (win->bin_window, cursor);
6529       gdk_cursor_unref (cursor);
6530
6531       gtk_im_context_set_client_window (GTK_TEXT_VIEW (win->widget)->im_context,
6532                                         win->window);
6533
6534
6535       gdk_window_set_background (win->bin_window,
6536                                  &win->widget->style->base[GTK_WIDGET_STATE (win->widget)]);
6537     }
6538   else
6539     {
6540       gdk_window_set_background (win->bin_window,
6541                                  &win->widget->style->bg[GTK_WIDGET_STATE (win->widget)]);
6542     }
6543
6544   g_object_set_qdata (G_OBJECT (win->window),
6545                       g_quark_from_static_string ("gtk-text-view-text-window"),
6546                       win);
6547
6548   g_object_set_qdata (G_OBJECT (win->bin_window),
6549                       g_quark_from_static_string ("gtk-text-view-text-window"),
6550                       win);
6551 }
6552
6553 static void
6554 text_window_unrealize (GtkTextWindow *win)
6555 {
6556   if (win->type == GTK_TEXT_WINDOW_TEXT)
6557     {
6558       gtk_im_context_set_client_window (GTK_TEXT_VIEW (win->widget)->im_context,
6559                                         NULL);
6560     }
6561
6562   gdk_window_set_user_data (win->window, NULL);
6563   gdk_window_set_user_data (win->bin_window, NULL);
6564   gdk_window_destroy (win->bin_window);
6565   gdk_window_destroy (win->window);
6566   win->window = NULL;
6567   win->bin_window = NULL;
6568 }
6569
6570 static void
6571 text_window_size_allocate (GtkTextWindow *win,
6572                            GdkRectangle  *rect)
6573 {
6574   win->allocation = *rect;
6575
6576   if (win->window)
6577     {
6578       gdk_window_move_resize (win->window,
6579                               rect->x, rect->y,
6580                               rect->width, rect->height);
6581
6582       gdk_window_resize (win->bin_window,
6583                          rect->width, rect->height);
6584     }
6585 }
6586
6587 static void
6588 text_window_scroll        (GtkTextWindow *win,
6589                            gint           dx,
6590                            gint           dy)
6591 {
6592   if (dx != 0 || dy != 0)
6593     {
6594       gdk_window_scroll (win->bin_window, dx, dy);
6595     }
6596 }
6597
6598 static void
6599 text_window_invalidate_rect (GtkTextWindow *win,
6600                              GdkRectangle  *rect)
6601 {
6602   GdkRectangle window_rect;
6603
6604   gtk_text_view_buffer_to_window_coords (GTK_TEXT_VIEW (win->widget),
6605                                          win->type,
6606                                          rect->x,
6607                                          rect->y,
6608                                          &window_rect.x,
6609                                          &window_rect.y);
6610
6611   window_rect.width = rect->width;
6612   window_rect.height = rect->height;
6613
6614   /* Adjust the rect as appropriate */
6615
6616   switch (win->type)
6617     {
6618     case GTK_TEXT_WINDOW_TEXT:
6619       break;
6620
6621     case GTK_TEXT_WINDOW_LEFT:
6622     case GTK_TEXT_WINDOW_RIGHT:
6623       window_rect.x = 0;
6624       window_rect.width = win->allocation.width;
6625       break;
6626
6627     case GTK_TEXT_WINDOW_TOP:
6628     case GTK_TEXT_WINDOW_BOTTOM:
6629       window_rect.y = 0;
6630       window_rect.height = win->allocation.height;
6631       break;
6632
6633     default:
6634       g_warning ("%s: bug!", G_STRLOC);
6635       return;
6636       break;
6637     }
6638
6639   gdk_window_invalidate_rect (win->bin_window, &window_rect, FALSE);
6640
6641 #if 0
6642   {
6643     GdkColor color = { 0, 65535, 0, 0 };
6644     GdkGC *gc = gdk_gc_new (win->bin_window);
6645     gdk_gc_set_rgb_fg_color (gc, &color);
6646     gdk_draw_rectangle (win->bin_window,
6647                         gc, TRUE, window_rect.x, window_rect.y,
6648                         window_rect.width, window_rect.height);
6649     gdk_gc_unref (gc);
6650   }
6651 #endif
6652 }
6653
6654 static gint
6655 text_window_get_width (GtkTextWindow *win)
6656 {
6657   return win->allocation.width;
6658 }
6659
6660 static gint
6661 text_window_get_height (GtkTextWindow *win)
6662 {
6663   return win->allocation.height;
6664 }
6665
6666 static void
6667 text_window_get_allocation (GtkTextWindow *win,
6668                             GdkRectangle  *rect)
6669 {
6670   *rect = win->allocation;
6671 }
6672
6673 /* Windows */
6674
6675
6676 /**
6677  * gtk_text_view_get_window:
6678  * @text_view: a #GtkTextView
6679  * @win: window to get
6680  *
6681  * Retrieves the #GdkWindow corresponding to an area of the text view;
6682  * possible windows include the overall widget window, child windows
6683  * on the left, right, top, bottom, and the window that displays the
6684  * text buffer. Windows are %NULL and nonexistent if their width or
6685  * height is 0, and are nonexistent before the widget has been
6686  * realized.
6687  *
6688  * Return value: a #GdkWindow, or %NULL
6689  **/
6690 GdkWindow*
6691 gtk_text_view_get_window (GtkTextView *text_view,
6692                           GtkTextWindowType win)
6693 {
6694   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
6695
6696   switch (win)
6697     {
6698     case GTK_TEXT_WINDOW_WIDGET:
6699       return GTK_WIDGET (text_view)->window;
6700       break;
6701
6702     case GTK_TEXT_WINDOW_TEXT:
6703       return text_view->text_window->bin_window;
6704       break;
6705
6706     case GTK_TEXT_WINDOW_LEFT:
6707       if (text_view->left_window)
6708         return text_view->left_window->bin_window;
6709       else
6710         return NULL;
6711       break;
6712
6713     case GTK_TEXT_WINDOW_RIGHT:
6714       if (text_view->right_window)
6715         return text_view->right_window->bin_window;
6716       else
6717         return NULL;
6718       break;
6719
6720     case GTK_TEXT_WINDOW_TOP:
6721       if (text_view->top_window)
6722         return text_view->top_window->bin_window;
6723       else
6724         return NULL;
6725       break;
6726
6727     case GTK_TEXT_WINDOW_BOTTOM:
6728       if (text_view->bottom_window)
6729         return text_view->bottom_window->bin_window;
6730       else
6731         return NULL;
6732       break;
6733
6734     case GTK_TEXT_WINDOW_PRIVATE:
6735       g_warning ("%s: You can't get GTK_TEXT_WINDOW_PRIVATE, it has \"PRIVATE\" in the name because it is private.", G_GNUC_FUNCTION);
6736       return NULL;
6737       break;
6738     }
6739
6740   g_warning ("%s: Unknown GtkTextWindowType", G_GNUC_FUNCTION);
6741   return NULL;
6742 }
6743
6744 /**
6745  * gtk_text_view_get_window_type:
6746  * @text_view: a #GtkTextView
6747  * @window: a window type
6748  *
6749  * Usually used to find out which window an event corresponds to.
6750  * If you connect to an event signal on @text_view, this function
6751  * should be called on <literal>event-&gt;window</literal> to
6752  * see which window it was.
6753  *
6754  * Return value: the window type.
6755  **/
6756 GtkTextWindowType
6757 gtk_text_view_get_window_type (GtkTextView *text_view,
6758                                GdkWindow   *window)
6759 {
6760   GtkTextWindow *win;
6761
6762   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
6763   g_return_val_if_fail (GDK_IS_WINDOW (window), 0);
6764
6765   if (window == GTK_WIDGET (text_view)->window)
6766     return GTK_TEXT_WINDOW_WIDGET;
6767
6768   win = g_object_get_qdata (G_OBJECT (window),
6769                             g_quark_try_string ("gtk-text-view-text-window"));
6770
6771   if (win)
6772     return win->type;
6773   else
6774     {
6775       return GTK_TEXT_WINDOW_PRIVATE;
6776     }
6777 }
6778
6779 static void
6780 buffer_to_widget (GtkTextView      *text_view,
6781                   gint              buffer_x,
6782                   gint              buffer_y,
6783                   gint             *window_x,
6784                   gint             *window_y)
6785 {
6786   if (window_x)
6787     {
6788       *window_x = buffer_x - text_view->xoffset;
6789       *window_x += text_view->text_window->allocation.x;
6790     }
6791
6792   if (window_y)
6793     {
6794       *window_y = buffer_y - text_view->yoffset;
6795       *window_y += text_view->text_window->allocation.y;
6796     }
6797 }
6798
6799 static void
6800 widget_to_text_window (GtkTextWindow *win,
6801                        gint           widget_x,
6802                        gint           widget_y,
6803                        gint          *window_x,
6804                        gint          *window_y)
6805 {
6806   if (window_x)
6807     *window_x = widget_x - win->allocation.x;
6808
6809   if (window_y)
6810     *window_y = widget_y - win->allocation.y;
6811 }
6812
6813 static void
6814 buffer_to_text_window (GtkTextView   *text_view,
6815                        GtkTextWindow *win,
6816                        gint           buffer_x,
6817                        gint           buffer_y,
6818                        gint          *window_x,
6819                        gint          *window_y)
6820 {
6821   if (win == NULL)
6822     {
6823       g_warning ("Attempt to convert text buffer coordinates to coordinates "
6824                  "for a nonexistent or private child window of GtkTextView");
6825       return;
6826     }
6827
6828   buffer_to_widget (text_view,
6829                     buffer_x, buffer_y,
6830                     window_x, window_y);
6831
6832   widget_to_text_window (win,
6833                          window_x ? *window_x : 0,
6834                          window_y ? *window_y : 0,
6835                          window_x,
6836                          window_y);
6837 }
6838
6839 /**
6840  * gtk_text_view_buffer_to_window_coords:
6841  * @text_view: a #GtkTextView
6842  * @win: a #GtkTextWindowType
6843  * @buffer_x: buffer x coordinate
6844  * @buffer_y: buffer y coordinate
6845  * @window_x: window x coordinate return location
6846  * @window_y: window y coordinate return location
6847  *
6848  * Converts coordinate (@buffer_x, @buffer_y) to coordinates for the window
6849  * @win, and stores the result in (@window_x, @window_y).
6850  **/
6851 void
6852 gtk_text_view_buffer_to_window_coords (GtkTextView      *text_view,
6853                                        GtkTextWindowType win,
6854                                        gint              buffer_x,
6855                                        gint              buffer_y,
6856                                        gint             *window_x,
6857                                        gint             *window_y)
6858 {
6859   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6860
6861   switch (win)
6862     {
6863     case GTK_TEXT_WINDOW_WIDGET:
6864       buffer_to_widget (text_view,
6865                         buffer_x, buffer_y,
6866                         window_x, window_y);
6867       break;
6868
6869     case GTK_TEXT_WINDOW_TEXT:
6870       if (window_x)
6871         *window_x = buffer_x - text_view->xoffset;
6872       if (window_y)
6873         *window_y = buffer_y - text_view->yoffset;
6874       break;
6875
6876     case GTK_TEXT_WINDOW_LEFT:
6877       buffer_to_text_window (text_view,
6878                              text_view->left_window,
6879                              buffer_x, buffer_y,
6880                              window_x, window_y);
6881       break;
6882
6883     case GTK_TEXT_WINDOW_RIGHT:
6884       buffer_to_text_window (text_view,
6885                              text_view->right_window,
6886                              buffer_x, buffer_y,
6887                              window_x, window_y);
6888       break;
6889
6890     case GTK_TEXT_WINDOW_TOP:
6891       buffer_to_text_window (text_view,
6892                              text_view->top_window,
6893                              buffer_x, buffer_y,
6894                              window_x, window_y);
6895       break;
6896
6897     case GTK_TEXT_WINDOW_BOTTOM:
6898       buffer_to_text_window (text_view,
6899                              text_view->bottom_window,
6900                              buffer_x, buffer_y,
6901                              window_x, window_y);
6902       break;
6903
6904     case GTK_TEXT_WINDOW_PRIVATE:
6905       g_warning ("%s: can't get coords for private windows", G_STRLOC);
6906       break;
6907
6908     default:
6909       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
6910       break;
6911     }
6912 }
6913
6914 static void
6915 widget_to_buffer (GtkTextView *text_view,
6916                   gint         widget_x,
6917                   gint         widget_y,
6918                   gint        *buffer_x,
6919                   gint        *buffer_y)
6920 {
6921   if (buffer_x)
6922     {
6923       *buffer_x = widget_x + text_view->xoffset;
6924       *buffer_x -= text_view->text_window->allocation.x;
6925     }
6926
6927   if (buffer_y)
6928     {
6929       *buffer_y = widget_y + text_view->yoffset;
6930       *buffer_y -= text_view->text_window->allocation.y;
6931     }
6932 }
6933
6934 static void
6935 text_window_to_widget (GtkTextWindow *win,
6936                        gint           window_x,
6937                        gint           window_y,
6938                        gint          *widget_x,
6939                        gint          *widget_y)
6940 {
6941   if (widget_x)
6942     *widget_x = window_x + win->allocation.x;
6943
6944   if (widget_y)
6945     *widget_y = window_y + win->allocation.y;
6946 }
6947
6948 static void
6949 text_window_to_buffer (GtkTextView   *text_view,
6950                        GtkTextWindow *win,
6951                        gint           window_x,
6952                        gint           window_y,
6953                        gint          *buffer_x,
6954                        gint          *buffer_y)
6955 {
6956   if (win == NULL)
6957     {
6958       g_warning ("Attempt to convert GtkTextView buffer coordinates into "
6959                  "coordinates for a nonexistent child window.");
6960       return;
6961     }
6962
6963   text_window_to_widget (win,
6964                          window_x,
6965                          window_y,
6966                          buffer_x,
6967                          buffer_y);
6968
6969   widget_to_buffer (text_view,
6970                     buffer_x ? *buffer_x : 0,
6971                     buffer_y ? *buffer_y : 0,
6972                     buffer_x,
6973                     buffer_y);
6974 }
6975
6976 /**
6977  * gtk_text_view_window_to_buffer_coords:
6978  * @text_view: a #GtkTextView
6979  * @win: a #GtkTextWindowType
6980  * @window_x: window x coordinate
6981  * @window_y: window y coordinate
6982  * @buffer_x: buffer x coordinate return location
6983  * @buffer_y: buffer y coordinate return location
6984  *
6985  * Converts coordinates on the window identified by @win to buffer
6986  * coordinates, storing the result in (@buffer_x,@buffer_y).
6987  **/
6988 void
6989 gtk_text_view_window_to_buffer_coords (GtkTextView      *text_view,
6990                                        GtkTextWindowType win,
6991                                        gint              window_x,
6992                                        gint              window_y,
6993                                        gint             *buffer_x,
6994                                        gint             *buffer_y)
6995 {
6996   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6997
6998   switch (win)
6999     {
7000     case GTK_TEXT_WINDOW_WIDGET:
7001       widget_to_buffer (text_view,
7002                         window_x, window_y,
7003                         buffer_x, buffer_y);
7004       break;
7005
7006     case GTK_TEXT_WINDOW_TEXT:
7007       if (buffer_x)
7008         *buffer_x = window_x + text_view->xoffset;
7009       if (buffer_y)
7010         *buffer_y = window_y + text_view->yoffset;
7011       break;
7012
7013     case GTK_TEXT_WINDOW_LEFT:
7014       text_window_to_buffer (text_view,
7015                              text_view->left_window,
7016                              window_x, window_y,
7017                              buffer_x, buffer_y);
7018       break;
7019
7020     case GTK_TEXT_WINDOW_RIGHT:
7021       text_window_to_buffer (text_view,
7022                              text_view->right_window,
7023                              window_x, window_y,
7024                              buffer_x, buffer_y);
7025       break;
7026
7027     case GTK_TEXT_WINDOW_TOP:
7028       text_window_to_buffer (text_view,
7029                              text_view->top_window,
7030                              window_x, window_y,
7031                              buffer_x, buffer_y);
7032       break;
7033
7034     case GTK_TEXT_WINDOW_BOTTOM:
7035       text_window_to_buffer (text_view,
7036                              text_view->bottom_window,
7037                              window_x, window_y,
7038                              buffer_x, buffer_y);
7039       break;
7040
7041     case GTK_TEXT_WINDOW_PRIVATE:
7042       g_warning ("%s: can't get coords for private windows", G_STRLOC);
7043       break;
7044
7045     default:
7046       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
7047       break;
7048     }
7049 }
7050
7051 static void
7052 set_window_width (GtkTextView      *text_view,
7053                   gint              width,
7054                   GtkTextWindowType type,
7055                   GtkTextWindow   **winp)
7056 {
7057   if (width == 0)
7058     {
7059       if (*winp)
7060         {
7061           text_window_free (*winp);
7062           *winp = NULL;
7063           gtk_widget_queue_resize (GTK_WIDGET (text_view));
7064         }
7065     }
7066   else
7067     {
7068       if (*winp == NULL)
7069         {
7070           *winp = text_window_new (type,
7071                                    GTK_WIDGET (text_view),
7072                                    width, 0);
7073           /* if the widget is already realized we need to realize the child manually */
7074           if (GTK_WIDGET_REALIZED (text_view))
7075             text_window_realize (*winp, GTK_WIDGET (text_view)->window);
7076         }
7077       else
7078         {
7079           if ((*winp)->requisition.width == width)
7080             return;
7081
7082           (*winp)->requisition.width = width;
7083         }
7084
7085       gtk_widget_queue_resize (GTK_WIDGET (text_view));
7086     }
7087 }
7088
7089
7090 static void
7091 set_window_height (GtkTextView      *text_view,
7092                    gint              height,
7093                    GtkTextWindowType type,
7094                    GtkTextWindow   **winp)
7095 {
7096   if (height == 0)
7097     {
7098       if (*winp)
7099         {
7100           text_window_free (*winp);
7101           *winp = NULL;
7102           gtk_widget_queue_resize (GTK_WIDGET (text_view));
7103         }
7104     }
7105   else
7106     {
7107       if (*winp == NULL)
7108         {
7109           *winp = text_window_new (type,
7110                                    GTK_WIDGET (text_view),
7111                                    0, height);
7112
7113           /* if the widget is already realized we need to realize the child manually */
7114           if (GTK_WIDGET_REALIZED (text_view))
7115             text_window_realize (*winp, GTK_WIDGET (text_view)->window);
7116         }
7117       else
7118         {
7119           if ((*winp)->requisition.height == height)
7120             return;
7121
7122           (*winp)->requisition.height = height;
7123         }
7124
7125       gtk_widget_queue_resize (GTK_WIDGET (text_view));
7126     }
7127 }
7128
7129 /**
7130  * gtk_text_view_set_border_window_size:
7131  * @text_view: a #GtkTextView
7132  * @type: window to affect
7133  * @size: width or height of the window
7134  *
7135  * Sets the width of %GTK_TEXT_WINDOW_LEFT or %GTK_TEXT_WINDOW_RIGHT,
7136  * or the height of %GTK_TEXT_WINDOW_TOP or %GTK_TEXT_WINDOW_BOTTOM.
7137  * Automatically destroys the corresponding window if the size is set
7138  * to 0, and creates the window if the size is set to non-zero.  This
7139  * function can only be used for the "border windows," it doesn't work
7140  * with #GTK_TEXT_WINDOW_WIDGET, #GTK_TEXT_WINDOW_TEXT, or
7141  * #GTK_TEXT_WINDOW_PRIVATE.
7142  **/
7143 void
7144 gtk_text_view_set_border_window_size (GtkTextView      *text_view,
7145                                       GtkTextWindowType type,
7146                                       gint              size)
7147
7148 {
7149   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
7150   g_return_if_fail (size >= 0);
7151
7152   switch (type)
7153     {
7154     case GTK_TEXT_WINDOW_LEFT:
7155       set_window_width (text_view, size, GTK_TEXT_WINDOW_LEFT,
7156                         &text_view->left_window);
7157       break;
7158
7159     case GTK_TEXT_WINDOW_RIGHT:
7160       set_window_width (text_view, size, GTK_TEXT_WINDOW_RIGHT,
7161                         &text_view->right_window);
7162       break;
7163
7164     case GTK_TEXT_WINDOW_TOP:
7165       set_window_height (text_view, size, GTK_TEXT_WINDOW_TOP,
7166                          &text_view->top_window);
7167       break;
7168
7169     case GTK_TEXT_WINDOW_BOTTOM:
7170       set_window_height (text_view, size, GTK_TEXT_WINDOW_BOTTOM,
7171                          &text_view->bottom_window);
7172       break;
7173
7174     default:
7175       g_warning ("Can only set size of left/right/top/bottom border windows with gtk_text_view_set_border_window_size()");
7176       break;
7177     }
7178 }
7179
7180 /**
7181  * gtk_text_view_get_border_window_size:
7182  * @text_view: a #GtkTextView
7183  * @type: window to return size from
7184  *
7185  * Gets the width of the specified border window. See
7186  * gtk_text_view_set_border_window_size().
7187  *
7188  * Return value: width of window
7189  **/
7190 gint
7191 gtk_text_view_get_border_window_size (GtkTextView       *text_view,
7192                                       GtkTextWindowType  type)
7193 {
7194   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
7195
7196   switch (type)
7197     {
7198     case GTK_TEXT_WINDOW_LEFT:
7199       if (text_view->left_window)
7200         return text_view->left_window->requisition.width;
7201
7202     case GTK_TEXT_WINDOW_RIGHT:
7203       if (text_view->right_window)
7204         return text_view->right_window->requisition.width;
7205
7206     case GTK_TEXT_WINDOW_TOP:
7207       if (text_view->top_window)
7208         return text_view->top_window->requisition.height;
7209
7210     case GTK_TEXT_WINDOW_BOTTOM:
7211       if (text_view->bottom_window)
7212         return text_view->bottom_window->requisition.height;
7213
7214     default:
7215       g_warning ("Can only get size of left/right/top/bottom border windows with gtk_text_view_get_border_window_size()");
7216       break;
7217     }
7218
7219   return 0;
7220 }
7221
7222 /*
7223  * Child widgets
7224  */
7225
7226 static GtkTextViewChild*
7227 text_view_child_new_anchored (GtkWidget          *child,
7228                               GtkTextChildAnchor *anchor,
7229                               GtkTextLayout      *layout)
7230 {
7231   GtkTextViewChild *vc;
7232
7233   vc = g_new (GtkTextViewChild, 1);
7234
7235   vc->widget = child;
7236   vc->anchor = anchor;
7237
7238   vc->from_top_of_line = 0;
7239   vc->from_left_of_buffer = 0;
7240
7241   g_object_ref (G_OBJECT (vc->widget));
7242   g_object_ref (G_OBJECT (vc->anchor));
7243
7244   g_object_set_data (G_OBJECT (child),
7245                      "gtk-text-view-child",
7246                      vc);
7247
7248   gtk_text_child_anchor_register_child (anchor, child, layout);
7249
7250   return vc;
7251 }
7252
7253 static GtkTextViewChild*
7254 text_view_child_new_window (GtkWidget          *child,
7255                             GtkTextWindowType   type,
7256                             gint                x,
7257                             gint                y)
7258 {
7259   GtkTextViewChild *vc;
7260
7261   vc = g_new (GtkTextViewChild, 1);
7262
7263   vc->widget = child;
7264   vc->anchor = NULL;
7265
7266   vc->from_top_of_line = 0;
7267   vc->from_left_of_buffer = 0;
7268
7269   g_object_ref (G_OBJECT (vc->widget));
7270
7271   vc->type = type;
7272   vc->x = x;
7273   vc->y = y;
7274
7275   g_object_set_data (G_OBJECT (child),
7276                      "gtk-text-view-child",
7277                      vc);
7278
7279   return vc;
7280 }
7281
7282 static void
7283 text_view_child_free (GtkTextViewChild *child)
7284 {
7285   g_object_set_data (G_OBJECT (child->widget),
7286                      "gtk-text-view-child", NULL);
7287
7288   if (child->anchor)
7289     {
7290       gtk_text_child_anchor_unregister_child (child->anchor,
7291                                               child->widget);
7292       g_object_unref (G_OBJECT (child->anchor));
7293     }
7294
7295   g_object_unref (G_OBJECT (child->widget));
7296
7297   g_free (child);
7298 }
7299
7300 static void
7301 text_view_child_set_parent_window (GtkTextView      *text_view,
7302                                    GtkTextViewChild *vc)
7303 {
7304   if (vc->anchor)
7305     gtk_widget_set_parent_window (vc->widget,
7306                                   text_view->text_window->bin_window);
7307   else
7308     {
7309       GdkWindow *window;
7310       window = gtk_text_view_get_window (text_view,
7311                                          vc->type);
7312       gtk_widget_set_parent_window (vc->widget, window);
7313     }
7314 }
7315
7316 static void
7317 add_child (GtkTextView      *text_view,
7318            GtkTextViewChild *vc)
7319 {
7320   text_view->children = g_slist_prepend (text_view->children,
7321                                          vc);
7322
7323   if (GTK_WIDGET_REALIZED (text_view))
7324     text_view_child_set_parent_window (text_view, vc);
7325
7326   gtk_widget_set_parent (vc->widget, GTK_WIDGET (text_view));
7327 }
7328
7329 /**
7330  * gtk_text_view_add_child_at_anchor:
7331  * @text_view: a #GtkTextView
7332  * @child: a #GtkWidget
7333  * @anchor: a #GtkTextChildAnchor in the #GtkTextBuffer for @text_view
7334  *
7335  * Adds a child widget in the text buffer, at the given @anchor.
7336  *
7337  **/
7338 void
7339 gtk_text_view_add_child_at_anchor (GtkTextView          *text_view,
7340                                    GtkWidget            *child,
7341                                    GtkTextChildAnchor   *anchor)
7342 {
7343   GtkTextViewChild *vc;
7344
7345   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
7346   g_return_if_fail (GTK_IS_WIDGET (child));
7347   g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
7348   g_return_if_fail (child->parent == NULL);
7349
7350   gtk_text_view_ensure_layout (text_view);
7351
7352   vc = text_view_child_new_anchored (child, anchor,
7353                                      text_view->layout);
7354
7355   add_child (text_view, vc);
7356
7357   g_assert (vc->widget == child);
7358   g_assert (gtk_widget_get_parent (child) == GTK_WIDGET (text_view));
7359 }
7360
7361 /**
7362  * gtk_text_view_add_child_in_window:
7363  * @text_view: a #GtkTextView
7364  * @child: a #GtkWidget
7365  * @which_window: which window the child should appear in
7366  * @xpos: X position of child in window coordinates
7367  * @ypos: Y position of child in window coordinates
7368  *
7369  * Adds a child at fixed coordinates in one of the text widget's
7370  * windows.  The window must have nonzero size (see
7371  * gtk_text_view_set_border_window_size()).  Note that the child
7372  * coordinates are given relative to the #GdkWindow in question, and
7373  * that these coordinates have no sane relationship to scrolling. When
7374  * placing a child in #GTK_TEXT_WINDOW_WIDGET, scrolling is
7375  * irrelevant, the child floats above all scrollable areas. But when
7376  * placing a child in one of the scrollable windows (border windows or
7377  * text window), you'll need to compute the child's correct position
7378  * in buffer coordinates any time scrolling occurs or buffer changes
7379  * occur, and then call gtk_text_view_move_child() to update the
7380  * child's position. Unfortunately there's no good way to detect that
7381  * scrolling has occurred, using the current API; a possible hack
7382  * would be to update all child positions when the scroll adjustments
7383  * change or the text buffer changes. See bug 64518 on
7384  * bugzilla.gnome.org for status of fixing this issue.
7385  *
7386  **/
7387 void
7388 gtk_text_view_add_child_in_window (GtkTextView          *text_view,
7389                                    GtkWidget            *child,
7390                                    GtkTextWindowType     which_window,
7391                                    gint                  xpos,
7392                                    gint                  ypos)
7393 {
7394   GtkTextViewChild *vc;
7395
7396   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
7397   g_return_if_fail (GTK_IS_WIDGET (child));
7398   g_return_if_fail (child->parent == NULL);
7399
7400   vc = text_view_child_new_window (child, which_window,
7401                                    xpos, ypos);
7402
7403   add_child (text_view, vc);
7404
7405   g_assert (vc->widget == child);
7406   g_assert (gtk_widget_get_parent (child) == GTK_WIDGET (text_view));
7407 }
7408
7409 /**
7410  * gtk_text_view_move_child:
7411  * @text_view: a #GtkTextView
7412  * @child: child widget already added to the text view
7413  * @xpos: new X position in window coordinates
7414  * @ypos: new Y position in window coordinates
7415  *
7416  * Updates the position of a child, as for gtk_text_view_add_child_in_window().
7417  *
7418  **/
7419 void
7420 gtk_text_view_move_child          (GtkTextView          *text_view,
7421                                    GtkWidget            *child,
7422                                    gint                  xpos,
7423                                    gint                  ypos)
7424 {
7425   GtkTextViewChild *vc;
7426
7427   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
7428   g_return_if_fail (GTK_IS_WIDGET (child));
7429   g_return_if_fail (child->parent == (GtkWidget*) text_view);
7430
7431   vc = g_object_get_data (G_OBJECT (child),
7432                           "gtk-text-view-child");
7433
7434   g_assert (vc != NULL);
7435
7436   if (vc->x == xpos &&
7437       vc->y == ypos)
7438     return;
7439
7440   vc->x = xpos;
7441   vc->y = ypos;
7442
7443   if (GTK_WIDGET_VISIBLE (child) && GTK_WIDGET_VISIBLE (text_view))
7444     gtk_widget_queue_resize (child);
7445 }
7446
7447
7448 /* Iterator operations */
7449
7450 /**
7451  * gtk_text_view_forward_display_line:
7452  * @text_view: a #GtkTextView
7453  * @iter: a #GtkTextIter
7454  *
7455  * Moves the given @iter forward by one display (wrapped) line.  A
7456  * display line is different from a paragraph. Paragraphs are
7457  * separated by newlines or other paragraph separator characters.
7458  * Display lines are created by line-wrapping a paragraph.  If
7459  * wrapping is turned off, display lines and paragraphs will be the
7460  * same. Display lines are divided differently for each view, since
7461  * they depend on the view's width; paragraphs are the same in all
7462  * views, since they depend on the contents of the #GtkTextBuffer.
7463  *
7464  * Return value: %TRUE if @iter was moved and is not on the end iterator
7465  **/
7466 gboolean
7467 gtk_text_view_forward_display_line (GtkTextView *text_view,
7468                                     GtkTextIter *iter)
7469 {
7470   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
7471   g_return_val_if_fail (iter != NULL, FALSE);
7472
7473   gtk_text_view_ensure_layout (text_view);
7474
7475   return gtk_text_layout_move_iter_to_next_line (text_view->layout, iter);
7476 }
7477
7478 /**
7479  * gtk_text_view_backward_display_line:
7480  * @text_view: a #GtkTextView
7481  * @iter: a #GtkTextIter
7482  *
7483  * Moves the given @iter backward by one display (wrapped) line.  A
7484  * display line is different from a paragraph. Paragraphs are
7485  * separated by newlines or other paragraph separator characters.
7486  * Display lines are created by line-wrapping a paragraph.  If
7487  * wrapping is turned off, display lines and paragraphs will be the
7488  * same. Display lines are divided differently for each view, since
7489  * they depend on the view's width; paragraphs are the same in all
7490  * views, since they depend on the contents of the #GtkTextBuffer.
7491  *
7492  * Return value: %TRUE if @iter was moved and is not on the end iterator
7493  **/
7494 gboolean
7495 gtk_text_view_backward_display_line (GtkTextView *text_view,
7496                                      GtkTextIter *iter)
7497 {
7498   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
7499   g_return_val_if_fail (iter != NULL, FALSE);
7500
7501   gtk_text_view_ensure_layout (text_view);
7502
7503   return gtk_text_layout_move_iter_to_previous_line (text_view->layout, iter);
7504 }
7505
7506 /**
7507  * gtk_text_view_forward_display_line_end:
7508  * @text_view: a #GtkTextView
7509  * @iter: a #GtkTextIter
7510  *
7511  * Moves the given @iter forward to the next display line end.  A
7512  * display line is different from a paragraph. Paragraphs are
7513  * separated by newlines or other paragraph separator characters.
7514  * Display lines are created by line-wrapping a paragraph.  If
7515  * wrapping is turned off, display lines and paragraphs will be the
7516  * same. Display lines are divided differently for each view, since
7517  * they depend on the view's width; paragraphs are the same in all
7518  * views, since they depend on the contents of the #GtkTextBuffer.
7519  *
7520  * Return value: %TRUE if @iter was moved and is not on the end iterator
7521  **/
7522 gboolean
7523 gtk_text_view_forward_display_line_end (GtkTextView *text_view,
7524                                         GtkTextIter *iter)
7525 {
7526   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
7527   g_return_val_if_fail (iter != NULL, FALSE);
7528
7529   gtk_text_view_ensure_layout (text_view);
7530
7531   return gtk_text_layout_move_iter_to_line_end (text_view->layout, iter, 1);
7532 }
7533
7534 /**
7535  * gtk_text_view_backward_display_line_start:
7536  * @text_view: a #GtkTextView
7537  * @iter: a #GtkTextIter
7538  *
7539  * Moves the given @iter backward to the next display line start.  A
7540  * display line is different from a paragraph. Paragraphs are
7541  * separated by newlines or other paragraph separator characters.
7542  * Display lines are created by line-wrapping a paragraph.  If
7543  * wrapping is turned off, display lines and paragraphs will be the
7544  * same. Display lines are divided differently for each view, since
7545  * they depend on the view's width; paragraphs are the same in all
7546  * views, since they depend on the contents of the #GtkTextBuffer.
7547  *
7548  * Return value: %TRUE if @iter was moved and is not on the end iterator
7549  **/
7550 gboolean
7551 gtk_text_view_backward_display_line_start (GtkTextView *text_view,
7552                                            GtkTextIter *iter)
7553 {
7554   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
7555   g_return_val_if_fail (iter != NULL, FALSE);
7556
7557   gtk_text_view_ensure_layout (text_view);
7558
7559   return gtk_text_layout_move_iter_to_line_end (text_view->layout, iter, -1);
7560 }
7561
7562 /**
7563  * gtk_text_view_starts_display_line:
7564  * @text_view: a #GtkTextView
7565  * @iter: a #GtkTextIter
7566  *
7567  * Determines whether @iter is at the start of a display line.
7568  * See gtk_text_view_forward_display_line() for an explanation of
7569  * display lines vs. paragraphs.
7570  *
7571  * Return value: %TRUE if @iter begins a wrapped line
7572  **/
7573 gboolean
7574 gtk_text_view_starts_display_line (GtkTextView       *text_view,
7575                                    const GtkTextIter *iter)
7576 {
7577   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
7578   g_return_val_if_fail (iter != NULL, FALSE);
7579
7580   gtk_text_view_ensure_layout (text_view);
7581
7582   return gtk_text_layout_iter_starts_line (text_view->layout, iter);
7583 }
7584
7585 /**
7586  * gtk_text_view_move_visually:
7587  * @text_view: a #GtkTextView
7588  * @iter: a #GtkTextIter
7589  * @count: number of lines to move
7590  *
7591  * Moves @iter up or down by @count display (wrapped) lines.
7592  * See gtk_text_view_forward_display_line() for an explanation of
7593  * display lines vs. paragraphs.
7594  *
7595  * Return value: %TRUE if @iter moved and is not on the end iterator
7596  **/
7597 gboolean
7598 gtk_text_view_move_visually (GtkTextView *text_view,
7599                              GtkTextIter *iter,
7600                              gint         count)
7601 {
7602   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
7603   g_return_val_if_fail (iter != NULL, FALSE);
7604
7605   gtk_text_view_ensure_layout (text_view);
7606
7607   return gtk_text_layout_move_iter_visually (text_view->layout, iter, count);
7608 }