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

   1 /* GTK - The GIMP Toolkit
   2  * gtktextview.c Copyright (C) 2000 Red Hat, Inc.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include <string.h>
  28
  29 #define GTK_TEXT_USE_INTERNAL_UNSUPPORTED_API
  30 #include "gtkbindings.h"
  31 #include "gtkdnd.h"
  32 #include "gtkimagemenuitem.h"
  33 #include "gtkintl.h"
  34 #include "gtkmain.h"
  35 #include "gtkmenu.h"
  36 #include "gtkmenuitem.h"
  37 #include "gtkseparatormenuitem.h"
  38 #include "gtksettings.h"
  39 #include "gtksignal.h"
  40 #include "gtkstock.h"
  41 #include "gtktextdisplay.h"
  42 #include "gtktextview.h"
  43 #include "gtkimmulticontext.h"
  44 #include "gdk/gdkkeysyms.h"
  45 #include <string.h>
  46
  47 /* How scrolling, validation, exposes, etc. work.
  48  *
  49  * The expose_event handler has the invariant that the onscreen lines
  50  * have been validated.
  51  *
  52  * There are two ways that onscreen lines can become invalid. The first
  53  * is to change which lines are onscreen. This happens when the value
  54  * of a scroll adjustment changes. So the code path begins in
  55  * gtk_text_view_value_changed() and goes like this:
  56  *   - gdk_window_scroll() to reflect the new adjustment value
  57  *   - validate the lines that were moved onscreen
  58  *   - gdk_window_process_updates() to handle the exposes immediately
  59  *
  60  * The second way is that you get the "invalidated" signal from the layout,
  61  * indicating that lines have become invalid. This code path begins in
  62  * invalidated_handler() and goes like this:
  63  *   - install high-priority idle which does the rest of the steps
  64  *   - if a scroll is pending from scroll_to_mark(), do the scroll,
  65  *     jumping to the gtk_text_view_value_changed() code path
  66  *   - otherwise, validate the onscreen lines
  67  *   - DO NOT process updates
  68  *
  69  * In both cases, validating the onscreen lines can trigger a scroll
  70  * due to maintaining the first_para on the top of the screen.
  71  * If validation triggers a scroll, we jump to the top of the code path
  72  * for value_changed, and bail out of the current code path.
  73  *
  74  * Also, in size_allocate, if we invalidate some lines from changing
  75  * the layout width, we need to go ahead and run the high-priority idle,
  76  * because GTK sends exposes right after doing the size allocates without
  77  * returning to the main loop. This is also why the high-priority idle
  78  * is at a higher priority than resizing.
  79  *
  80  */
  81
  82 #define SCREEN_WIDTH(widget) text_window_get_width (GTK_TEXT_VIEW (widget)->text_window)
  83 #define SCREEN_HEIGHT(widget) text_window_get_height (GTK_TEXT_VIEW (widget)->text_window)
  84
  85 #if 0
  86 #define DEBUG_VALIDATION_AND_SCROLLING
  87 #endif
  88
  89 #ifdef DEBUG_VALIDATION_AND_SCROLLING
  90 #define DV(x) (x)
  91 #else
  92 #define DV(x)
  93 #endif
  94
  95 struct _GtkTextPendingScroll
  96 {
  97   GtkTextMark   *mark;
  98   gdouble        within_margin;
  99   gboolean       use_align;
 100   gdouble        xalign;
 101   gdouble        yalign;
 102 };
 103
 104 enum
 105 {
 106   SET_SCROLL_ADJUSTMENTS,
 107   POPULATE_POPUP,
 108   MOVE_CURSOR,
 109   SET_ANCHOR,
 110   INSERT_AT_CURSOR,
 111   DELETE_FROM_CURSOR,
 112   CUT_CLIPBOARD,
 113   COPY_CLIPBOARD,
 114   PASTE_CLIPBOARD,
 115   TOGGLE_OVERWRITE,
 116   LAST_SIGNAL
 117 };
 118
 119 enum
 120 {
 121   PROP_0,
 122   PROP_PIXELS_ABOVE_LINES,
 123   PROP_PIXELS_BELOW_LINES,
 124   PROP_PIXELS_INSIDE_WRAP,
 125   PROP_EDITABLE,
 126   PROP_WRAP_MODE,
 127   PROP_JUSTIFICATION,
 128   PROP_LEFT_MARGIN,
 129   PROP_RIGHT_MARGIN,
 130   PROP_INDENT,
 131   PROP_TABS,
 132   PROP_CURSOR_VISIBLE,
 133   LAST_PROP
 134 };
 135
 136 static void gtk_text_view_init                 (GtkTextView      *text_view);
 137 static void gtk_text_view_class_init           (GtkTextViewClass *klass);
 138 static void gtk_text_view_destroy              (GtkObject        *object);
 139 static void gtk_text_view_finalize             (GObject          *object);
 140 static void gtk_text_view_set_property         (GObject         *object,
 141                                                 guint            prop_id,
 142                                                 const GValue    *value,
 143                                                 GParamSpec      *pspec);
 144 static void gtk_text_view_get_property         (GObject         *object,
 145                                                 guint            prop_id,
 146                                                 GValue          *value,
 147                                                 GParamSpec      *pspec);
 148 static void gtk_text_view_size_request         (GtkWidget        *widget,
 149                                                 GtkRequisition   *requisition);
 150 static void gtk_text_view_size_allocate        (GtkWidget        *widget,
 151                                                 GtkAllocation    *allocation);
 152 static void gtk_text_view_realize              (GtkWidget        *widget);
 153 static void gtk_text_view_unrealize            (GtkWidget        *widget);
 154 static void gtk_text_view_style_set            (GtkWidget        *widget,
 155                                                 GtkStyle         *previous_style);
 156 static void gtk_text_view_direction_changed    (GtkWidget        *widget,
 157                                                 GtkTextDirection  previous_direction);
 158 static gint gtk_text_view_event                (GtkWidget        *widget,
 159                                                 GdkEvent         *event);
 160 static gint gtk_text_view_key_press_event      (GtkWidget        *widget,
 161                                                 GdkEventKey      *event);
 162 static gint gtk_text_view_key_release_event    (GtkWidget        *widget,
 163                                                 GdkEventKey      *event);
 164 static gint gtk_text_view_button_press_event   (GtkWidget        *widget,
 165                                                 GdkEventButton   *event);
 166 static gint gtk_text_view_button_release_event (GtkWidget        *widget,
 167                                                 GdkEventButton   *event);
 168 static gint gtk_text_view_focus_in_event       (GtkWidget        *widget,
 169                                                 GdkEventFocus    *event);
 170 static gint gtk_text_view_focus_out_event      (GtkWidget        *widget,
 171                                                 GdkEventFocus    *event);
 172 static gint gtk_text_view_motion_event         (GtkWidget        *widget,
 173                                                 GdkEventMotion   *event);
 174 static gint gtk_text_view_expose_event         (GtkWidget        *widget,
 175                                                 GdkEventExpose   *expose);
 176 static void gtk_text_view_draw_focus           (GtkWidget        *widget);
 177 static void gtk_text_view_grab_focus           (GtkWidget        *widget);
 178
 179 /* Source side drag signals */
 180 static void gtk_text_view_drag_begin       (GtkWidget        *widget,
 181                                             GdkDragContext   *context);
 182 static void gtk_text_view_drag_end         (GtkWidget        *widget,
 183                                             GdkDragContext   *context);
 184 static void gtk_text_view_drag_data_get    (GtkWidget        *widget,
 185                                             GdkDragContext   *context,
 186                                             GtkSelectionData *selection_data,
 187                                             guint             info,
 188                                             guint             time);
 189 static void gtk_text_view_drag_data_delete (GtkWidget        *widget,
 190                                             GdkDragContext   *context);
 191
 192 /* Target side drag signals */
 193 static void     gtk_text_view_drag_leave         (GtkWidget        *widget,
 194                                                   GdkDragContext   *context,
 195                                                   guint             time);
 196 static gboolean gtk_text_view_drag_motion        (GtkWidget        *widget,
 197                                                   GdkDragContext   *context,
 198                                                   gint              x,
 199                                                   gint              y,
 200                                                   guint             time);
 201 static gboolean gtk_text_view_drag_drop          (GtkWidget        *widget,
 202                                                   GdkDragContext   *context,
 203                                                   gint              x,
 204                                                   gint              y,
 205                                                   guint             time);
 206 static void     gtk_text_view_drag_data_received (GtkWidget        *widget,
 207                                                   GdkDragContext   *context,
 208                                                   gint              x,
 209                                                   gint              y,
 210                                                   GtkSelectionData *selection_data,
 211                                                   guint             info,
 212                                                   guint             time);
 213
 214 static void gtk_text_view_set_scroll_adjustments (GtkTextView   *text_view,
 215                                                   GtkAdjustment *hadj,
 216                                                   GtkAdjustment *vadj);
 217 static void gtk_text_view_popup_menu             (GtkWidget     *widget);
 218
 219 static void gtk_text_view_move_cursor      (GtkTextView           *text_view,
 220                                             GtkMovementStep        step,
 221                                             gint                   count,
 222                                             gboolean               extend_selection);
 223 static void gtk_text_view_set_anchor       (GtkTextView           *text_view);
 224 static void gtk_text_view_scroll_pages     (GtkTextView           *text_view,
 225                                             gint                   count);
 226 static void gtk_text_view_insert_at_cursor (GtkTextView           *text_view,
 227                                             const gchar           *str);
 228 static void gtk_text_view_delete_from_cursor (GtkTextView           *text_view,
 229                                               GtkDeleteType          type,
 230                                               gint                   count);
 231 static void gtk_text_view_cut_clipboard    (GtkTextView           *text_view);
 232 static void gtk_text_view_copy_clipboard   (GtkTextView           *text_view);
 233 static void gtk_text_view_paste_clipboard  (GtkTextView           *text_view);
 234 static void gtk_text_view_toggle_overwrite (GtkTextView           *text_view);
 235 static void gtk_text_view_unselect         (GtkTextView           *text_view);
 236
 237 static void     gtk_text_view_validate_onscreen     (GtkTextView        *text_view);
 238 static void     gtk_text_view_get_first_para_iter   (GtkTextView        *text_view,
 239                                                      GtkTextIter        *iter);
 240 static void     gtk_text_view_update_layout_width       (GtkTextView        *text_view);
 241 static void     gtk_text_view_set_attributes_from_style (GtkTextView        *text_view,
 242                                                          GtkTextAttributes *values,
 243                                                          GtkStyle           *style);
 244 static void     gtk_text_view_ensure_layout          (GtkTextView        *text_view);
 245 static void     gtk_text_view_destroy_layout         (GtkTextView        *text_view);
 246 static void     gtk_text_view_check_keymap_direction (GtkTextView        *text_view);
 247 static void     gtk_text_view_reset_im_context       (GtkTextView        *text_view);
 248 static void     gtk_text_view_start_selection_drag   (GtkTextView        *text_view,
 249                                                       const GtkTextIter  *iter,
 250                                                       GdkEventButton     *event);
 251 static gboolean gtk_text_view_end_selection_drag     (GtkTextView        *text_view,
 252                                                       GdkEventButton     *event);
 253 static void     gtk_text_view_start_selection_dnd    (GtkTextView        *text_view,
 254                                                       const GtkTextIter  *iter,
 255                                                       GdkEventMotion     *event);
 256 static void     gtk_text_view_check_cursor_blink     (GtkTextView        *text_view);
 257 static void     gtk_text_view_pend_cursor_blink      (GtkTextView        *text_view);
 258 static void     gtk_text_view_stop_cursor_blink      (GtkTextView        *text_view);
 259
 260 static void gtk_text_view_value_changed           (GtkAdjustment *adj,
 261                                                    GtkTextView   *view);
 262 static void gtk_text_view_commit_handler          (GtkIMContext  *context,
 263                                                    const gchar   *str,
 264                                                    GtkTextView   *text_view);
 265 static void gtk_text_view_preedit_changed_handler (GtkIMContext  *context,
 266                                                    GtkTextView   *text_view);
 267
 268 static void gtk_text_view_mark_set_handler       (GtkTextBuffer     *buffer,
 269                                                   const GtkTextIter *location,
 270                                                   GtkTextMark       *mark,
 271                                                   gpointer           data);
 272 static void gtk_text_view_get_virtual_cursor_pos (GtkTextView       *text_view,
 273                                                   gint              *x,
 274                                                   gint              *y);
 275 static void gtk_text_view_set_virtual_cursor_pos (GtkTextView       *text_view,
 276                                                   gint               x,
 277                                                   gint               y);
 278
 279 static GtkAdjustment* get_hadjustment            (GtkTextView       *text_view);
 280 static GtkAdjustment* get_vadjustment            (GtkTextView       *text_view);
 281
 282 static void gtk_text_view_do_popup               (GtkTextView       *text_view,
 283                                                   GdkEventButton    *event);
 284
 285 static void gtk_text_view_queue_scroll           (GtkTextView   *text_view,
 286                                                   GtkTextMark   *mark,
 287                                                   gdouble        within_margin,
 288                                                   gboolean       use_align,
 289                                                   gdouble        xalign,
 290                                                   gdouble        yalign);
 291
 292 static gboolean gtk_text_view_flush_scroll       (GtkTextView *text_view);
 293 static void     gtk_text_view_update_adjustments (GtkTextView *text_view);
 294 static void     gtk_text_view_invalidate         (GtkTextView *text_view);
 295
 296 static void gtk_text_view_update_im_spot_location (GtkTextView *text_view);
 297
 298 /* Container methods */
 299 static void gtk_text_view_add    (GtkContainer *container,
 300                                   GtkWidget    *child);
 301 static void gtk_text_view_remove (GtkContainer *container,
 302                                   GtkWidget    *child);
 303 static void gtk_text_view_forall (GtkContainer *container,
 304                                   gboolean      include_internals,
 305                                   GtkCallback   callback,
 306                                   gpointer      callback_data);
 307
 308 /* FIXME probably need the focus methods. */
 309
 310 typedef struct _GtkTextViewChild GtkTextViewChild;
 311
 312 struct _GtkTextViewChild
 313 {
 314   GtkWidget *widget;
 315
 316   GtkTextChildAnchor *anchor;
 317
 318   gint from_top_of_line;
 319   gint from_left_of_buffer;
 320
 321   /* These are ignored if anchor != NULL */
 322   GtkTextWindowType type;
 323   gint x;
 324   gint y;
 325 };
 326
 327 static GtkTextViewChild* text_view_child_new_anchored      (GtkWidget          *child,
 328                                                             GtkTextChildAnchor *anchor,
 329                                                             GtkTextLayout      *layout);
 330 static GtkTextViewChild* text_view_child_new_window        (GtkWidget          *child,
 331                                                             GtkTextWindowType   type,
 332                                                             gint                x,
 333                                                             gint                y);
 334 static void              text_view_child_free              (GtkTextViewChild   *child);
 335 static void              text_view_child_set_parent_window (GtkTextView        *text_view,
 336                                                             GtkTextViewChild   *child);
 337
 338 struct _GtkTextWindow
 339 {
 340   GtkTextWindowType type;
 341   GtkWidget *widget;
 342   GdkWindow *window;
 343   GdkWindow *bin_window;
 344   GtkRequisition requisition;
 345   GdkRectangle allocation;
 346 };
 347
 348 static GtkTextWindow *text_window_new             (GtkTextWindowType  type,
 349                                                    GtkWidget         *widget,
 350                                                    gint               width_request,
 351                                                    gint               height_request);
 352 static void           text_window_free            (GtkTextWindow     *win);
 353 static void           text_window_realize         (GtkTextWindow     *win,
 354                                                    GdkWindow         *parent);
 355 static void           text_window_unrealize       (GtkTextWindow     *win);
 356 static void           text_window_size_allocate   (GtkTextWindow     *win,
 357                                                    GdkRectangle      *rect);
 358 static void           text_window_scroll          (GtkTextWindow     *win,
 359                                                    gint               dx,
 360                                                    gint               dy);
 361 static void           text_window_invalidate_rect (GtkTextWindow     *win,
 362                                                    GdkRectangle      *rect);
 363
 364 static gint           text_window_get_width       (GtkTextWindow     *win);
 365 static gint           text_window_get_height      (GtkTextWindow     *win);
 366 static void           text_window_get_allocation  (GtkTextWindow     *win,
 367                                                    GdkRectangle      *rect);
 368
 369
 370 enum
 371 {
 372   TARGET_STRING,
 373   TARGET_TEXT,
 374   TARGET_COMPOUND_TEXT,
 375   TARGET_UTF8_STRING,
 376   TARGET_TEXT_BUFFER_CONTENTS
 377 };
 378
 379 static GtkTargetEntry target_table[] = {
 380   { "GTK_TEXT_BUFFER_CONTENTS", GTK_TARGET_SAME_APP,
 381     TARGET_TEXT_BUFFER_CONTENTS },
 382   { "UTF8_STRING", 0, TARGET_UTF8_STRING },
 383   { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
 384   { "TEXT", 0, TARGET_TEXT },
 385   { "text/plain", 0, TARGET_STRING },
 386   { "STRING",     0, TARGET_STRING }
 387 };
 388
 389 static GtkContainerClass *parent_class = NULL;
 390 static guint signals[LAST_SIGNAL] = { 0 };
 391
 392 GtkType
 393 gtk_text_view_get_type (void)
 394 {
 395   static GtkType our_type = 0;
 396
 397   if (our_type == 0)
 398     {
 399       static const GtkTypeInfo our_info =
 400       {
 401         "GtkTextView",
 402         sizeof (GtkTextView),
 403         sizeof (GtkTextViewClass),
 404         (GtkClassInitFunc) gtk_text_view_class_init,
 405         (GtkObjectInitFunc) gtk_text_view_init,
 406         /* reserved_1 */ NULL,
 407         /* reserved_2 */ NULL,
 408         (GtkClassInitFunc) NULL
 409       };
 410
 411       our_type = gtk_type_unique (GTK_TYPE_CONTAINER, &our_info);
 412     }
 413
 414   return our_type;
 415 }
 416
 417 static void
 418 add_move_binding (GtkBindingSet  *binding_set,
 419                   guint           keyval,
 420                   guint           modmask,
 421                   GtkMovementStep step,
 422                   gint            count)
 423 {
 424   g_return_if_fail ((modmask & GDK_SHIFT_MASK) == 0);
 425
 426   gtk_binding_entry_add_signal (binding_set, keyval, modmask,
 427                                 "move_cursor", 3,
 428                                 GTK_TYPE_ENUM, step,
 429                                 GTK_TYPE_INT, count,
 430                                 GTK_TYPE_BOOL, FALSE);
 431
 432   /* Selection-extending version */
 433   gtk_binding_entry_add_signal (binding_set, keyval, modmask | GDK_SHIFT_MASK,
 434                                 "move_cursor", 3,
 435                                 GTK_TYPE_ENUM, step,
 436                                 GTK_TYPE_INT, count,
 437                                 GTK_TYPE_BOOL, TRUE);
 438 }
 439
 440 static void
 441 gtk_text_view_class_init (GtkTextViewClass *klass)
 442 {
 443   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 444   GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass);
 445   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 446   GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
 447   GtkBindingSet *binding_set;
 448
 449   parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
 450
 451   /* Default handlers and virtual methods
 452    */
 453   gobject_class->set_property = gtk_text_view_set_property;
 454   gobject_class->get_property = gtk_text_view_get_property;
 455
 456   object_class->destroy = gtk_text_view_destroy;
 457   gobject_class->finalize = gtk_text_view_finalize;
 458
 459   widget_class->realize = gtk_text_view_realize;
 460   widget_class->unrealize = gtk_text_view_unrealize;
 461   widget_class->style_set = gtk_text_view_style_set;
 462   widget_class->direction_changed = gtk_text_view_direction_changed;
 463   widget_class->size_request = gtk_text_view_size_request;
 464   widget_class->size_allocate = gtk_text_view_size_allocate;
 465   widget_class->event = gtk_text_view_event;
 466   widget_class->key_press_event = gtk_text_view_key_press_event;
 467   widget_class->key_release_event = gtk_text_view_key_release_event;
 468   widget_class->button_press_event = gtk_text_view_button_press_event;
 469   widget_class->button_release_event = gtk_text_view_button_release_event;
 470   widget_class->focus_in_event = gtk_text_view_focus_in_event;
 471   widget_class->focus_out_event = gtk_text_view_focus_out_event;
 472   widget_class->motion_notify_event = gtk_text_view_motion_event;
 473   widget_class->expose_event = gtk_text_view_expose_event;
 474   widget_class->grab_focus = gtk_text_view_grab_focus;
 475
 476   widget_class->drag_begin = gtk_text_view_drag_begin;
 477   widget_class->drag_end = gtk_text_view_drag_end;
 478   widget_class->drag_data_get = gtk_text_view_drag_data_get;
 479   widget_class->drag_data_delete = gtk_text_view_drag_data_delete;
 480
 481   widget_class->drag_leave = gtk_text_view_drag_leave;
 482   widget_class->drag_motion = gtk_text_view_drag_motion;
 483   widget_class->drag_drop = gtk_text_view_drag_drop;
 484   widget_class->drag_data_received = gtk_text_view_drag_data_received;
 485
 486   widget_class->popup_menu = gtk_text_view_popup_menu;
 487
 488   container_class->add = gtk_text_view_add;
 489   container_class->remove = gtk_text_view_remove;
 490   container_class->forall = gtk_text_view_forall;
 491
 492   klass->move_cursor = gtk_text_view_move_cursor;
 493   klass->set_anchor = gtk_text_view_set_anchor;
 494   klass->insert_at_cursor = gtk_text_view_insert_at_cursor;
 495   klass->delete_from_cursor = gtk_text_view_delete_from_cursor;
 496   klass->cut_clipboard = gtk_text_view_cut_clipboard;
 497   klass->copy_clipboard = gtk_text_view_copy_clipboard;
 498   klass->paste_clipboard = gtk_text_view_paste_clipboard;
 499   klass->toggle_overwrite = gtk_text_view_toggle_overwrite;
 500   klass->set_scroll_adjustments = gtk_text_view_set_scroll_adjustments;
 501
 502   /*
 503    * Properties
 504    */
 505
 506   g_object_class_install_property (gobject_class,
 507                                    PROP_PIXELS_ABOVE_LINES,
 508                                    g_param_spec_int ("pixels_above_lines",
 509                                                      _("Pixels Above Lines"),
 510                                                      _("Pixels of blank space above paragraphs"),
 511                                                      0,
 512                                                      G_MAXINT,
 513                                                      0,
 514                                                      G_PARAM_READWRITE));
 515
 516   g_object_class_install_property (gobject_class,
 517                                    PROP_PIXELS_BELOW_LINES,
 518                                    g_param_spec_int ("pixels_below_lines",
 519                                                      _("Pixels Below Lines"),
 520                                                      _("Pixels of blank space below paragraphs"),
 521                                                      0,
 522                                                      G_MAXINT,
 523                                                      0,
 524                                                      G_PARAM_READWRITE));
 525
 526   g_object_class_install_property (gobject_class,
 527                                    PROP_PIXELS_INSIDE_WRAP,
 528                                    g_param_spec_int ("pixels_inside_wrap",
 529                                                      _("Pixels Inside Wrap"),
 530                                                      _("Pixels of blank space between wrapped lines in a paragraph"),
 531                                                      0,
 532                                                      G_MAXINT,
 533                                                      0,
 534                                                      G_PARAM_READWRITE));
 535
 536   g_object_class_install_property (gobject_class,
 537                                    PROP_EDITABLE,
 538                                    g_param_spec_boolean ("editable",
 539                                                          _("Editable"),
 540                                                          _("Whether the text can be modified by the user"),
 541                                                          TRUE,
 542                                                          G_PARAM_READWRITE));
 543
 544   g_object_class_install_property (gobject_class,
 545                                    PROP_WRAP_MODE,
 546                                    g_param_spec_enum ("wrap_mode",
 547                                                       _("Wrap Mode"),
 548                                                       _("Whether to wrap lines never, at word boundaries, or at character boundaries"),
 549                                                       GTK_TYPE_WRAP_MODE,
 550                                                       GTK_WRAP_NONE,
 551                                                       G_PARAM_READWRITE));
 552
 553   g_object_class_install_property (gobject_class,
 554                                    PROP_JUSTIFICATION,
 555                                    g_param_spec_enum ("justification",
 556                                                       _("Justification"),
 557                                                       _("Left, right, or center justification"),
 558                                                       GTK_TYPE_JUSTIFICATION,
 559                                                       GTK_JUSTIFY_LEFT,
 560                                                       G_PARAM_READWRITE));
 561
 562   g_object_class_install_property (gobject_class,
 563                                    PROP_LEFT_MARGIN,
 564                                    g_param_spec_int ("left_margin",
 565                                                      _("Left Margin"),
 566                                                      _("Width of the left margin in pixels"),
 567                                                      0,
 568                                                      G_MAXINT,
 569                                                      0,
 570                                                      G_PARAM_READWRITE));
 571
 572   g_object_class_install_property (gobject_class,
 573                                    PROP_RIGHT_MARGIN,
 574                                    g_param_spec_int ("right_margin",
 575                                                      _("Right Margin"),
 576                                                      _("Width of the right margin in pixels"),
 577                                                      0,
 578                                                      G_MAXINT,
 579                                                      0,
 580                                                      G_PARAM_READWRITE));
 581
 582   g_object_class_install_property (gobject_class,
 583                                    PROP_INDENT,
 584                                    g_param_spec_int ("indent",
 585                                                      _("Indent"),
 586                                                      _("Amount to indent the paragraph, in pixels"),
 587                                                      0,
 588                                                      G_MAXINT,
 589                                                      0,
 590                                                      G_PARAM_READWRITE));
 591
 592   g_object_class_install_property (gobject_class,
 593                                    PROP_TABS,
 594                                    g_param_spec_boxed ("tabs",
 595                                                        _("Tabs"),
 596                                                        _("Custom tabs for this text"),
 597                                                        PANGO_TYPE_TAB_ARRAY,
 598                                                        G_PARAM_READWRITE));
 599
 600   g_object_class_install_property (gobject_class,
 601                                    PROP_CURSOR_VISIBLE,
 602                                    g_param_spec_boolean ("cursor_visible",
 603                                                          _("Cursor Visible"),
 604                                                          _("If the insertion cursor is shown"),
 605                                                          TRUE,
 606                                                          G_PARAM_READWRITE));
 607
 608
 609   /*
 610    * Style properties
 611    */
 612
 613   gtk_widget_class_install_style_property (widget_class,
 614                                            g_param_spec_boxed ("cursor_color",
 615                                                                _("Cursor color"),
 616                                                                _("Color with which to draw insertion cursor"),
 617                                                                GDK_TYPE_COLOR,
 618                                                                G_PARAM_READABLE));
 619
 620
 621   /*
 622    * Signals
 623    */
 624
 625   signals[MOVE_CURSOR] =
 626     gtk_signal_new ("move_cursor",
 627                     GTK_RUN_LAST | GTK_RUN_ACTION,
 628                     GTK_CLASS_TYPE (object_class),
 629                     GTK_SIGNAL_OFFSET (GtkTextViewClass, move_cursor),
 630                     gtk_marshal_VOID__ENUM_INT_BOOLEAN,
 631                     GTK_TYPE_NONE, 3, GTK_TYPE_MOVEMENT_STEP, GTK_TYPE_INT, GTK_TYPE_BOOL);
 632
 633   signals[SET_ANCHOR] =
 634     gtk_signal_new ("set_anchor",
 635                     GTK_RUN_LAST | GTK_RUN_ACTION,
 636                     GTK_CLASS_TYPE (object_class),
 637                     GTK_SIGNAL_OFFSET (GtkTextViewClass, set_anchor),
 638                     gtk_marshal_VOID__VOID,
 639                     GTK_TYPE_NONE, 0);
 640
 641   signals[INSERT_AT_CURSOR] =
 642     gtk_signal_new ("insert_at_cursor",
 643                     GTK_RUN_LAST | GTK_RUN_ACTION,
 644                     GTK_CLASS_TYPE (object_class),
 645                     GTK_SIGNAL_OFFSET (GtkTextViewClass, insert_at_cursor),
 646                     gtk_marshal_VOID__STRING,
 647                     GTK_TYPE_NONE, 1, GTK_TYPE_STRING);
 648
 649   signals[DELETE_FROM_CURSOR] =
 650     gtk_signal_new ("delete_from_cursor",
 651                     GTK_RUN_LAST | GTK_RUN_ACTION,
 652                     GTK_CLASS_TYPE (object_class),
 653                     GTK_SIGNAL_OFFSET (GtkTextViewClass, delete_from_cursor),
 654                     gtk_marshal_VOID__ENUM_INT,
 655                     GTK_TYPE_NONE, 2, GTK_TYPE_DELETE_TYPE, GTK_TYPE_INT);
 656
 657   signals[CUT_CLIPBOARD] =
 658     gtk_signal_new ("cut_clipboard",
 659                     GTK_RUN_LAST | GTK_RUN_ACTION,
 660                     GTK_CLASS_TYPE (object_class),
 661                     GTK_SIGNAL_OFFSET (GtkTextViewClass, cut_clipboard),
 662                     gtk_marshal_VOID__VOID,
 663                     GTK_TYPE_NONE, 0);
 664
 665   signals[COPY_CLIPBOARD] =
 666     gtk_signal_new ("copy_clipboard",
 667                     GTK_RUN_LAST | GTK_RUN_ACTION,
 668                     GTK_CLASS_TYPE (object_class),
 669                     GTK_SIGNAL_OFFSET (GtkTextViewClass, copy_clipboard),
 670                     gtk_marshal_VOID__VOID,
 671                     GTK_TYPE_NONE, 0);
 672
 673   signals[PASTE_CLIPBOARD] =
 674     gtk_signal_new ("paste_clipboard",
 675                     GTK_RUN_LAST | GTK_RUN_ACTION,
 676                     GTK_CLASS_TYPE (object_class),
 677                     GTK_SIGNAL_OFFSET (GtkTextViewClass, paste_clipboard),
 678                     gtk_marshal_VOID__VOID,
 679                     GTK_TYPE_NONE, 0);
 680
 681   signals[TOGGLE_OVERWRITE] =
 682     gtk_signal_new ("toggle_overwrite",
 683                     GTK_RUN_LAST | GTK_RUN_ACTION,
 684                     GTK_CLASS_TYPE (object_class),
 685                     GTK_SIGNAL_OFFSET (GtkTextViewClass, toggle_overwrite),
 686                     gtk_marshal_VOID__VOID,
 687                     GTK_TYPE_NONE, 0);
 688
 689   signals[SET_SCROLL_ADJUSTMENTS] =
 690     gtk_signal_new ("set_scroll_adjustments",
 691                     GTK_RUN_LAST,
 692                     GTK_CLASS_TYPE (object_class),
 693                     GTK_SIGNAL_OFFSET (GtkTextViewClass, set_scroll_adjustments),
 694                     gtk_marshal_VOID__OBJECT_OBJECT,
 695                     GTK_TYPE_NONE, 2, GTK_TYPE_ADJUSTMENT, GTK_TYPE_ADJUSTMENT);
 696   widget_class->set_scroll_adjustments_signal = signals[SET_SCROLL_ADJUSTMENTS];
 697
 698   signals[POPULATE_POPUP] =
 699     gtk_signal_new ("populate_popup",
 700                     GTK_RUN_LAST,
 701                     GTK_CLASS_TYPE (object_class),
 702                     GTK_SIGNAL_OFFSET (GtkTextViewClass, populate_popup),
 703                     gtk_marshal_VOID__OBJECT,
 704                     GTK_TYPE_NONE, 1, GTK_TYPE_MENU);
 705
 706   /*
 707    * Key bindings
 708    */
 709
 710   binding_set = gtk_binding_set_by_class (klass);
 711
 712   /* Moving the insertion point */
 713   add_move_binding (binding_set, GDK_Right, 0,
 714                     GTK_MOVEMENT_VISUAL_POSITIONS, 1);
 715
 716   add_move_binding (binding_set, GDK_KP_Right, 0,
 717                     GTK_MOVEMENT_VISUAL_POSITIONS, 1);
 718
 719   add_move_binding (binding_set, GDK_Left, 0,
 720                     GTK_MOVEMENT_VISUAL_POSITIONS, -1);
 721
 722   add_move_binding (binding_set, GDK_KP_Left, 0,
 723                     GTK_MOVEMENT_VISUAL_POSITIONS, -1);
 724
 725   add_move_binding (binding_set, GDK_f, GDK_CONTROL_MASK,
 726                     GTK_MOVEMENT_LOGICAL_POSITIONS, 1);
 727
 728   add_move_binding (binding_set, GDK_b, GDK_CONTROL_MASK,
 729                     GTK_MOVEMENT_LOGICAL_POSITIONS, -1);
 730
 731   add_move_binding (binding_set, GDK_Right, GDK_CONTROL_MASK,
 732                     GTK_MOVEMENT_WORDS, 1);
 733
 734   add_move_binding (binding_set, GDK_KP_Right, GDK_CONTROL_MASK,
 735                     GTK_MOVEMENT_WORDS, 1);
 736
 737   add_move_binding (binding_set, GDK_Left, GDK_CONTROL_MASK,
 738                     GTK_MOVEMENT_WORDS, -1);
 739
 740   add_move_binding (binding_set, GDK_KP_Left, GDK_CONTROL_MASK,
 741                     GTK_MOVEMENT_WORDS, 1);
 742
 743   /* Eventually we want to move by display lines, not paragraphs */
 744   add_move_binding (binding_set, GDK_Up, 0,
 745                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 746
 747   add_move_binding (binding_set, GDK_KP_Up, 0,
 748                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 749
 750   add_move_binding (binding_set, GDK_Down, 0,
 751                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 752
 753   add_move_binding (binding_set, GDK_KP_Down, 0,
 754                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 755
 756   add_move_binding (binding_set, GDK_p, GDK_CONTROL_MASK,
 757                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 758
 759   add_move_binding (binding_set, GDK_n, GDK_CONTROL_MASK,
 760                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 761
 762   add_move_binding (binding_set, GDK_Up, GDK_CONTROL_MASK,
 763                     GTK_MOVEMENT_PARAGRAPHS, -1);
 764
 765   add_move_binding (binding_set, GDK_KP_Up, GDK_CONTROL_MASK,
 766                     GTK_MOVEMENT_PARAGRAPHS, -1);
 767
 768   add_move_binding (binding_set, GDK_Down, GDK_CONTROL_MASK,
 769                     GTK_MOVEMENT_PARAGRAPHS, 1);
 770
 771   add_move_binding (binding_set, GDK_KP_Down, GDK_CONTROL_MASK,
 772                     GTK_MOVEMENT_PARAGRAPHS, 1);
 773
 774   add_move_binding (binding_set, GDK_a, GDK_CONTROL_MASK,
 775                     GTK_MOVEMENT_PARAGRAPH_ENDS, -1);
 776
 777   add_move_binding (binding_set, GDK_e, GDK_CONTROL_MASK,
 778                     GTK_MOVEMENT_PARAGRAPH_ENDS, 1);
 779
 780   add_move_binding (binding_set, GDK_f, GDK_MOD1_MASK,
 781                     GTK_MOVEMENT_WORDS, 1);
 782
 783   add_move_binding (binding_set, GDK_b, GDK_MOD1_MASK,
 784                     GTK_MOVEMENT_WORDS, -1);
 785
 786   add_move_binding (binding_set, GDK_Home, 0,
 787                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
 788
 789   add_move_binding (binding_set, GDK_KP_Home, 0,
 790                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
 791
 792   add_move_binding (binding_set, GDK_End, 0,
 793                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
 794
 795   add_move_binding (binding_set, GDK_KP_End, 0,
 796                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
 797
 798   add_move_binding (binding_set, GDK_Home, GDK_CONTROL_MASK,
 799                     GTK_MOVEMENT_BUFFER_ENDS, -1);
 800
 801   add_move_binding (binding_set, GDK_KP_Home, GDK_CONTROL_MASK,
 802                     GTK_MOVEMENT_BUFFER_ENDS, -1);
 803
 804   add_move_binding (binding_set, GDK_End, GDK_CONTROL_MASK,
 805                     GTK_MOVEMENT_BUFFER_ENDS, 1);
 806
 807   add_move_binding (binding_set, GDK_KP_End, GDK_CONTROL_MASK,
 808                     GTK_MOVEMENT_BUFFER_ENDS, 1);
 809
 810   add_move_binding (binding_set, GDK_Page_Up, 0,
 811                     GTK_MOVEMENT_PAGES, -1);
 812
 813   add_move_binding (binding_set, GDK_KP_Page_Up, 0,
 814                     GTK_MOVEMENT_PAGES, -1);
 815
 816   add_move_binding (binding_set, GDK_Page_Down, 0,
 817                     GTK_MOVEMENT_PAGES, 1);
 818
 819   add_move_binding (binding_set, GDK_KP_Page_Down, 0,
 820                     GTK_MOVEMENT_PAGES, 1);
 821
 822   /* Setting the cut/paste/copy anchor */
 823   gtk_binding_entry_add_signal (binding_set, GDK_space, GDK_CONTROL_MASK,
 824                                 "set_anchor", 0);
 825   gtk_binding_entry_add_signal (binding_set, GDK_KP_Space, GDK_CONTROL_MASK,
 826                                 "set_anchor", 0);
 827
 828   /* Deleting text */
 829   gtk_binding_entry_add_signal (binding_set, GDK_Delete, 0,
 830                                 "delete_from_cursor", 2,
 831                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 832                                 GTK_TYPE_INT, 1);
 833
 834   gtk_binding_entry_add_signal (binding_set, GDK_KP_Delete, 0,
 835                                 "delete_from_cursor", 2,
 836                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 837                                 GTK_TYPE_INT, 1);
 838
 839   gtk_binding_entry_add_signal (binding_set, GDK_d, GDK_CONTROL_MASK,
 840                                 "delete_from_cursor", 2,
 841                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 842                                 GTK_TYPE_INT, 1);
 843
 844   gtk_binding_entry_add_signal (binding_set, GDK_BackSpace, 0,
 845                                 "delete_from_cursor", 2,
 846                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 847                                 GTK_TYPE_INT, -1);
 848
 849   gtk_binding_entry_add_signal (binding_set, GDK_Delete, GDK_CONTROL_MASK,
 850                                 "delete_from_cursor", 2,
 851                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 852                                 GTK_TYPE_INT, 1);
 853
 854   gtk_binding_entry_add_signal (binding_set, GDK_KP_Delete, GDK_CONTROL_MASK,
 855                                 "delete_from_cursor", 2,
 856                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 857                                 GTK_TYPE_INT, 1);
 858
 859   gtk_binding_entry_add_signal (binding_set, GDK_d, GDK_MOD1_MASK,
 860                                 "delete_from_cursor", 2,
 861                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 862                                 GTK_TYPE_INT, 1);
 863
 864   gtk_binding_entry_add_signal (binding_set, GDK_BackSpace, GDK_CONTROL_MASK,
 865                                 "delete_from_cursor", 2,
 866                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 867                                 GTK_TYPE_INT, -1);
 868
 869   gtk_binding_entry_add_signal (binding_set, GDK_k, GDK_CONTROL_MASK,
 870                                 "delete_from_cursor", 2,
 871                                 GTK_TYPE_ENUM, GTK_DELETE_PARAGRAPH_ENDS,
 872                                 GTK_TYPE_INT, 1);
 873
 874   gtk_binding_entry_add_signal (binding_set, GDK_u, GDK_CONTROL_MASK,
 875                                 "delete_from_cursor", 2,
 876                                 GTK_TYPE_ENUM, GTK_DELETE_PARAGRAPHS,
 877                                 GTK_TYPE_INT, 1);
 878
 879   gtk_binding_entry_add_signal (binding_set, GDK_space, GDK_MOD1_MASK,
 880                                 "delete_from_cursor", 2,
 881                                 GTK_TYPE_ENUM, GTK_DELETE_WHITESPACE,
 882                                 GTK_TYPE_INT, 1);
 883   gtk_binding_entry_add_signal (binding_set, GDK_KP_Space, GDK_MOD1_MASK,
 884                                 "delete_from_cursor", 2,
 885                                 GTK_TYPE_ENUM, GTK_DELETE_WHITESPACE,
 886                                 GTK_TYPE_INT, 1);
 887   gtk_binding_entry_add_signal (binding_set, GDK_space, GDK_MOD1_MASK,
 888                                 "insert_at_cursor", 1,
 889                                 GTK_TYPE_STRING, " ");
 890   gtk_binding_entry_add_signal (binding_set, GDK_KP_Space, GDK_MOD1_MASK,
 891                                 "insert_at_cursor", 1,
 892                                 GTK_TYPE_STRING, " ");
 893
 894   gtk_binding_entry_add_signal (binding_set, GDK_backslash, GDK_MOD1_MASK,
 895                                 "delete_from_cursor", 2,
 896                                 GTK_TYPE_ENUM, GTK_DELETE_WHITESPACE,
 897                                 GTK_TYPE_INT, 1);
 898
 899   /* Cut/copy/paste */
 900
 901   gtk_binding_entry_add_signal (binding_set, GDK_x, GDK_CONTROL_MASK,
 902                                 "cut_clipboard", 0);
 903
 904   gtk_binding_entry_add_signal (binding_set, GDK_w, GDK_CONTROL_MASK,
 905                                 "cut_clipboard", 0);
 906
 907   gtk_binding_entry_add_signal (binding_set, GDK_c, GDK_CONTROL_MASK,
 908                                 "copy_clipboard", 0);
 909
 910   gtk_binding_entry_add_signal (binding_set, GDK_v, GDK_CONTROL_MASK,
 911                                 "paste_clipboard", 0);
 912
 913   gtk_binding_entry_add_signal (binding_set, GDK_y, GDK_CONTROL_MASK,
 914                                 "paste_clipboard", 0);
 915
 916   /* Overwrite */
 917   gtk_binding_entry_add_signal (binding_set, GDK_Insert, 0,
 918                                 "toggle_overwrite", 0);
 919   gtk_binding_entry_add_signal (binding_set, GDK_KP_Insert, 0,
 920                                 "toggle_overwrite", 0);
 921 }
 922
 923 void
 924 gtk_text_view_init (GtkTextView *text_view)
 925 {
 926   GtkWidget *widget;
 927
 928   widget = GTK_WIDGET (text_view);
 929
 930   GTK_WIDGET_SET_FLAGS (widget, GTK_CAN_FOCUS);
 931
 932   /* Set up default style */
 933   text_view->wrap_mode = GTK_WRAP_NONE;
 934   text_view->pixels_above_lines = 0;
 935   text_view->pixels_below_lines = 0;
 936   text_view->pixels_inside_wrap = 0;
 937   text_view->justify = GTK_JUSTIFY_LEFT;
 938   text_view->left_margin = 0;
 939   text_view->right_margin = 0;
 940   text_view->indent = 0;
 941   text_view->tabs = NULL;
 942   text_view->editable = TRUE;
 943
 944   gtk_drag_dest_set (widget,
 945                      0,
 946                      target_table, G_N_ELEMENTS (target_table),
 947                      GDK_ACTION_COPY | GDK_ACTION_MOVE);
 948
 949   text_view->virtual_cursor_x = -1;
 950   text_view->virtual_cursor_y = -1;
 951
 952   /* This object is completely private. No external entity can gain a reference
 953    * to it; so we create it here and destroy it in finalize ().
 954    */
 955   text_view->im_context = gtk_im_multicontext_new ();
 956
 957   g_signal_connect (G_OBJECT (text_view->im_context), "commit",
 958                     G_CALLBACK (gtk_text_view_commit_handler), text_view);
 959
 960   g_signal_connect (G_OBJECT (text_view->im_context), "preedit_changed",
 961                     G_CALLBACK (gtk_text_view_preedit_changed_handler), text_view);
 962
 963   text_view->cursor_visible = TRUE;
 964
 965   text_view->text_window = text_window_new (GTK_TEXT_WINDOW_TEXT,
 966                                             widget, 200, 200);
 967
 968   text_view->drag_start_x = -1;
 969   text_view->drag_start_y = -1;
 970
 971   text_view->pending_place_cursor_button = 0;
 972 }
 973
 974 /**
 975  * gtk_text_view_new:
 976  *
 977  * Creates a new #GtkTextView. If you don't call gtk_text_view_set_buffer()
 978  * before using the text view, an empty default buffer will be created
 979  * for you. Get the buffer with gtk_text_view_get_buffer(). If you want
 980  * to specify your own buffer, consider gtk_text_view_new_with_buffer().
 981  *
 982  * Return value: a new #GtkTextView
 983  **/
 984 GtkWidget*
 985 gtk_text_view_new (void)
 986 {
 987   return GTK_WIDGET (gtk_type_new (gtk_text_view_get_type ()));
 988 }
 989
 990 /**
 991  * gtk_text_view_new_with_buffer:
 992  * @buffer: a #GtkTextBuffer
 993  *
 994  * Creates a new #GtkTextView widget displaying the buffer
 995  * @buffer. One buffer can be shared among many widgets.
 996  * @buffer may be NULL to create a default buffer, in which case
 997  * this function is equivalent to gtk_text_view_new(). The
 998  * text view adds its own reference count to the buffer; it does not
 999  * take over an existing reference.
1000  *
1001  * Return value: a new #GtkTextView.
1002  **/
1003 GtkWidget*
1004 gtk_text_view_new_with_buffer (GtkTextBuffer *buffer)
1005 {
1006   GtkTextView *text_view;
1007
1008   text_view = (GtkTextView*)gtk_text_view_new ();
1009
1010   gtk_text_view_set_buffer (text_view, buffer);
1011
1012   return GTK_WIDGET (text_view);
1013 }
1014
1015 /**
1016  * gtk_text_view_set_buffer:
1017  * @text_view: a #GtkTextView
1018  * @buffer: a #GtkTextBuffer
1019  *
1020  * Sets @buffer as the buffer being displayed by @text_view. The previous
1021  * buffer displayed by the text view is unreferenced, and a reference is
1022  * added to @buffer. If you owned a reference to @buffer before passing it
1023  * to this function, you must remove that reference yourself; #GtkTextView
1024  * will not "adopt" it.
1025  *
1026  **/
1027 void
1028 gtk_text_view_set_buffer (GtkTextView   *text_view,
1029                           GtkTextBuffer *buffer)
1030 {
1031   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1032   g_return_if_fail (buffer == NULL || GTK_IS_TEXT_BUFFER (buffer));
1033
1034   if (text_view->buffer == buffer)
1035     return;
1036
1037   if (text_view->buffer != NULL)
1038     {
1039       /* Destroy all anchored children */
1040       GSList *tmp_list;
1041       GSList *copy;
1042
1043       copy = g_slist_copy (text_view->children);
1044       tmp_list = copy;
1045       while (tmp_list != NULL)
1046         {
1047           GtkTextViewChild *vc = tmp_list->data;
1048
1049           if (vc->anchor)
1050             {
1051               gtk_widget_destroy (vc->widget);
1052               /* vc may now be invalid! */
1053             }
1054
1055           tmp_list = g_slist_next (tmp_list);
1056         }
1057
1058       g_slist_free (copy);
1059
1060       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->buffer),
1061                                             gtk_text_view_mark_set_handler, text_view);
1062       g_object_unref (G_OBJECT (text_view->buffer));
1063       text_view->dnd_mark = NULL;
1064
1065       if (GTK_WIDGET_REALIZED (text_view))
1066         gtk_text_buffer_remove_selection_clipboard (text_view->buffer,
1067                                                     gtk_clipboard_get (GDK_SELECTION_PRIMARY));
1068     }
1069
1070   text_view->buffer = buffer;
1071
1072   if (buffer != NULL)
1073     {
1074       GtkTextIter start;
1075
1076       g_object_ref (G_OBJECT (buffer));
1077
1078       if (text_view->layout)
1079         gtk_text_layout_set_buffer (text_view->layout, buffer);
1080
1081       gtk_text_buffer_get_iter_at_offset (text_view->buffer, &start, 0);
1082
1083       text_view->dnd_mark = gtk_text_buffer_create_mark (text_view->buffer,
1084                                                          "gtk_drag_target",
1085                                                          &start, FALSE);
1086
1087       text_view->first_para_mark = gtk_text_buffer_create_mark (text_view->buffer,
1088                                                                 NULL,
1089                                                                 &start, TRUE);
1090
1091       text_view->first_para_pixels = 0;
1092
1093       g_signal_connect (G_OBJECT (text_view->buffer), "mark_set",
1094                         G_CALLBACK (gtk_text_view_mark_set_handler), text_view);
1095
1096       if (GTK_WIDGET_REALIZED (text_view))
1097         gtk_text_buffer_add_selection_clipboard (text_view->buffer,
1098                                                  gtk_clipboard_get (GDK_SELECTION_PRIMARY));
1099     }
1100
1101   if (GTK_WIDGET_VISIBLE (text_view))
1102     gtk_widget_queue_draw (GTK_WIDGET (text_view));
1103
1104   gtk_text_view_invalidate (text_view);
1105 }
1106
1107 static GtkTextBuffer*
1108 get_buffer (GtkTextView *text_view)
1109 {
1110   if (text_view->buffer == NULL)
1111     {
1112       GtkTextBuffer *b;
1113       b = gtk_text_buffer_new (NULL);
1114       gtk_text_view_set_buffer (text_view, b);
1115       g_object_unref (G_OBJECT (b));
1116     }
1117
1118   return text_view->buffer;
1119 }
1120
1121 /**
1122  * gtk_text_view_get_buffer:
1123  * @text_view: a #GtkTextView
1124  *
1125  * Returns the #GtkTextBuffer being displayed by this text view.
1126  * The reference count on the buffer is not incremented; the caller
1127  * of this function won't own a new reference.
1128  *
1129  * Return value: a #GtkTextBuffer
1130  **/
1131 GtkTextBuffer*
1132 gtk_text_view_get_buffer (GtkTextView *text_view)
1133 {
1134   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
1135
1136   return get_buffer (text_view);
1137 }
1138
1139 /**
1140  * gtk_text_view_get_iter_at_location:
1141  * @text_view: a #GtkTextView
1142  * @iter: a #GtkTextIter
1143  * @x: x position, in buffer coordinates
1144  * @y: y position, in buffer coordinates
1145  *
1146  * Retrieves the iterator at buffer coordinates @x and @y. Buffer
1147  * coordinates are coordinates for the entire buffer, not just the
1148  * currently-displayed portion.  If you have coordinates from an
1149  * event, you have to convert those to buffer coordinates with
1150  * gtk_text_view_window_to_buffer_coords().
1151  *
1152  **/
1153 void
1154 gtk_text_view_get_iter_at_location (GtkTextView *text_view,
1155                                     GtkTextIter *iter,
1156                                     gint         x,
1157                                     gint         y)
1158 {
1159   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1160   g_return_if_fail (iter != NULL);
1161   g_return_if_fail (text_view->layout != NULL);
1162
1163   gtk_text_layout_get_iter_at_pixel (text_view->layout,
1164                                      iter,
1165                                      x,
1166                                      y);
1167 }
1168
1169 /**
1170  * gtk_text_view_get_iter_location:
1171  * @text_view: a #GtkTextView
1172  * @iter: a #GtkTextIter
1173  * @location: bounds of the character at @iter
1174  *
1175  * Gets a rectangle which roughly contains the character at @iter.
1176  * The rectangle position is in buffer coordinates; use
1177  * gtk_text_view_buffer_to_window_coords() to convert these
1178  * coordinates to coordinates for one of the windows in the text view.
1179  *
1180  **/
1181 void
1182 gtk_text_view_get_iter_location (GtkTextView       *text_view,
1183                                  const GtkTextIter *iter,
1184                                  GdkRectangle      *location)
1185 {
1186   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1187   g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
1188
1189   gtk_text_layout_get_iter_location (text_view->layout, iter, location);
1190 }
1191
1192 /**
1193  * gtk_text_view_get_line_yrange:
1194  * @text_view: a #GtkTextView
1195  * @iter: a #GtkTextIter
1196  * @y: return location for a y coordinate
1197  * @height: return location for a height
1198  *
1199  * Gets the y coordinate of the top of the line containing @iter,
1200  * and the height of the line. The coordinate is a buffer coordinate;
1201  * convert to window coordinates with gtk_text_view_buffer_to_window_coords().
1202  *
1203  **/
1204 void
1205 gtk_text_view_get_line_yrange (GtkTextView       *text_view,
1206                                const GtkTextIter *iter,
1207                                gint              *y,
1208                                gint              *height)
1209 {
1210   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1211   g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
1212
1213   gtk_text_layout_get_line_yrange (text_view->layout,
1214                                    iter,
1215                                    y,
1216                                    height);
1217 }
1218
1219 /**
1220  * gtk_text_view_get_line_at_y:
1221  * @text_view: a #GtkTextView
1222  * @target_iter: a #GtkTextIter
1223  * @y: a y coordinate
1224  * @line_top: return location for top coordinate of the line
1225  *
1226  * Gets the #GtkTextIter at the start of the line containing
1227  * the coordinate @y. @y is in buffer coordinates, convert from
1228  * window coordinates with gtk_text_view_window_to_buffer_coords().
1229  * If non-%NULL, @line_top will be filled with the coordinate of the top
1230  * edge of the line.
1231  **/
1232 void
1233 gtk_text_view_get_line_at_y (GtkTextView *text_view,
1234                              GtkTextIter *target_iter,
1235                              gint         y,
1236                              gint        *line_top)
1237 {
1238   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1239
1240   gtk_text_layout_get_line_at_y (text_view->layout,
1241                                  target_iter,
1242                                  y,
1243                                  line_top);
1244 }
1245
1246 static gboolean
1247 set_adjustment_clamped (GtkAdjustment *adj, gdouble val)
1248 {
1249   DV (g_print ("  Setting adj to raw value %g\n", val));
1250
1251   /* We don't really want to clamp to upper; we want to clamp to
1252      upper - page_size which is the highest value the scrollbar
1253      will let us reach. */
1254   if (val > (adj->upper - adj->page_size))
1255     val = adj->upper - adj->page_size;
1256
1257   if (val < adj->lower)
1258     val = adj->lower;
1259
1260   if (val != adj->value)
1261     {
1262       DV (g_print ("  Setting adj to clamped value %g\n", val));
1263       gtk_adjustment_set_value (adj, val);
1264       return TRUE;
1265     }
1266   else
1267     return FALSE;
1268 }
1269
1270 /**
1271  * gtk_text_view_scroll_to_iter:
1272  * @text_view: a #GtkTextView
1273  * @iter: a #GtkTextIter
1274  * @within_margin: margin as a [0.0,0.5) fraction of screen size
1275  * @use_align: whether to use alignment arguments (if %FALSE, just get the mark onscreen)
1276  * @xalign: horizontal alignment of mark within visible area.
1277  * @yalign: vertical alignment of mark within visible area
1278  *
1279  * Scrolls @text_view so that @iter is on the screen in the position
1280  * indicated by @xalign and @yalign. An alignment of 0.0 indicates
1281  * left or top, 1.0 indicates right or bottom, 0.5 means center. If @use_align
1282  * is %FALSE, the text scrolls the minimal distance to get the mark onscreen,
1283  * possibly not scrolling at all. The effective screen for purposes
1284  * of this function is reduced by a margin of size @within_margin.
1285  * NOTE: This function uses the currently-computed height of the
1286  * lines in the text buffer. Note that line heights are computed
1287  * in an idle handler; so this function may not have the desired effect
1288  * if it's called before the height computations. To avoid oddness,
1289  * consider using gtk_text_view_scroll_to_mark() which saves a point
1290  * to be scrolled to after line validation.
1291  *
1292  * Return value: %TRUE if scrolling occurred
1293  **/
1294 gboolean
1295 gtk_text_view_scroll_to_iter (GtkTextView   *text_view,
1296                               GtkTextIter   *iter,
1297                               gdouble        within_margin,
1298                               gboolean       use_align,
1299                               gdouble        xalign,
1300                               gdouble        yalign)
1301 {
1302   GdkRectangle rect;
1303   GdkRectangle screen;
1304   gint screen_bottom;
1305   gint screen_right;
1306   gint scroll_dest;
1307   GtkWidget *widget;
1308   gboolean retval = FALSE;
1309   gint scroll_inc;
1310   gint screen_xoffset, screen_yoffset;
1311   gint current_x_scroll, current_y_scroll;
1312
1313   /* FIXME why don't we do the validate-at-scroll-destination thing
1314    * from flush_scroll in this function? I think it wasn't done before
1315    * because changed_handler was screwed up, but I could be wrong.
1316    */
1317
1318   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1319   g_return_val_if_fail (iter != NULL, FALSE);
1320   g_return_val_if_fail (within_margin >= 0.0 && within_margin < 0.5, FALSE);
1321   g_return_val_if_fail (xalign >= 0.0 && xalign <= 1.0, FALSE);
1322   g_return_val_if_fail (yalign >= 0.0 && yalign <= 1.0, FALSE);
1323
1324   widget = GTK_WIDGET (text_view);
1325
1326   DV(g_print(G_STRLOC"\n"));
1327
1328   gtk_text_layout_get_iter_location (text_view->layout,
1329                                      iter,
1330                                      &rect);
1331
1332   DV (g_print (" target rect %d,%d  %d x %d\n", rect.x, rect.y, rect.width, rect.height));
1333
1334   current_x_scroll = text_view->xoffset;
1335   current_y_scroll = text_view->yoffset;
1336
1337   screen.x = current_x_scroll;
1338   screen.y = current_y_scroll;
1339   screen.width = SCREEN_WIDTH (widget);
1340   screen.height = SCREEN_HEIGHT (widget);
1341
1342   screen_xoffset = screen.width * within_margin;
1343   screen_yoffset = screen.height * within_margin;
1344
1345   screen.x += screen_xoffset;
1346   screen.y += screen_yoffset;
1347   screen.width -= screen_xoffset * 2;
1348   screen.height -= screen_yoffset * 2;
1349
1350   /* paranoia check */
1351   if (screen.width < 1)
1352     screen.width = 1;
1353   if (screen.height < 1)
1354     screen.height = 1;
1355
1356   screen_right = screen.x + screen.width;
1357   screen_bottom = screen.y + screen.height;
1358
1359   /* The alignment affects the point in the target character that we
1360    * choose to align. If we're doing right/bottom alignment, we align
1361    * the right/bottom edge of the character the mark is at; if we're
1362    * doing left/top we align the left/top edge of the character; if
1363    * we're doing center alignment we align the center of the
1364    * character.
1365    */
1366
1367   /* Vertical scroll */
1368
1369   scroll_inc = 0;
1370   scroll_dest = current_y_scroll;
1371
1372   if (use_align)
1373     {
1374       scroll_dest = rect.y + (rect.height * yalign) - (screen.height * yalign);
1375
1376       /* if scroll_dest < screen.y, we move a negative increment (up),
1377        * else a positive increment (down)
1378        */
1379       scroll_inc = scroll_dest - screen.y + screen_yoffset;
1380     }
1381   else
1382     {
1383       /* move minimum to get onscreen */
1384       if (rect.y < screen.y)
1385         {
1386           scroll_dest = rect.y;
1387           scroll_inc = scroll_dest - screen.y - screen_yoffset;
1388         }
1389       else if ((rect.y + rect.height) > screen_bottom)
1390         {
1391           scroll_dest = rect.y + rect.height;
1392           scroll_inc = scroll_dest - screen_bottom + screen_yoffset;
1393         }
1394     }
1395
1396   if (scroll_inc != 0)
1397     {
1398       retval = set_adjustment_clamped (get_vadjustment (text_view),
1399                                        current_y_scroll + scroll_inc);
1400
1401       DV (g_print (" vert increment %d\n", scroll_inc));
1402     }
1403
1404   /* Horizontal scroll */
1405
1406   scroll_inc = 0;
1407   scroll_dest = current_x_scroll;
1408
1409   if (use_align)
1410     {
1411       scroll_dest = rect.x + (rect.width * xalign) - (screen.width * xalign);
1412
1413       /* if scroll_dest < screen.y, we move a negative increment (left),
1414        * else a positive increment (right)
1415        */
1416       scroll_inc = scroll_dest - screen.x + screen_xoffset;
1417     }
1418   else
1419     {
1420       /* move minimum to get onscreen */
1421       if (rect.x < screen.x)
1422         {
1423           scroll_dest = rect.x;
1424           scroll_inc = scroll_dest - screen.x - screen_xoffset;
1425         }
1426       else if ((rect.x + rect.width) > screen_right)
1427         {
1428           scroll_dest = rect.x + rect.width;
1429           scroll_inc = scroll_dest - screen_right + screen_xoffset;
1430         }
1431     }
1432
1433   if (scroll_inc != 0)
1434     {
1435       retval = set_adjustment_clamped (get_hadjustment (text_view),
1436                                        current_x_scroll + scroll_inc);
1437
1438       DV (g_print (" horiz increment %d\n", scroll_inc));
1439     }
1440
1441   if (retval)
1442     DV(g_print (">Actually scrolled ("G_STRLOC")\n"));
1443   else
1444     DV(g_print (">Didn't end up scrolling ("G_STRLOC")\n"));
1445
1446   return retval;
1447 }
1448
1449 static void
1450 free_pending_scroll (GtkTextPendingScroll *scroll)
1451 {
1452   if (!gtk_text_mark_get_deleted (scroll->mark))
1453     gtk_text_buffer_delete_mark (gtk_text_mark_get_buffer (scroll->mark),
1454                                  scroll->mark);
1455   g_object_unref (G_OBJECT (scroll->mark));
1456   g_free (scroll);
1457 }
1458
1459 static void
1460 gtk_text_view_queue_scroll (GtkTextView   *text_view,
1461                             GtkTextMark   *mark,
1462                             gdouble        within_margin,
1463                             gboolean       use_align,
1464                             gdouble        xalign,
1465                             gdouble        yalign)
1466 {
1467   GtkTextIter iter;
1468   GtkTextPendingScroll *scroll;
1469
1470   DV(g_print(G_STRLOC"\n"));
1471
1472   scroll = g_new (GtkTextPendingScroll, 1);
1473
1474   scroll->within_margin = within_margin;
1475   scroll->use_align = use_align;
1476   scroll->xalign = xalign;
1477   scroll->yalign = yalign;
1478
1479   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
1480
1481   scroll->mark = gtk_text_buffer_create_mark (get_buffer (text_view),
1482                                               NULL,
1483                                               &iter,
1484                                               gtk_text_mark_get_left_gravity (mark));
1485
1486   g_object_ref (G_OBJECT (scroll->mark));
1487
1488   if (text_view->pending_scroll)
1489     free_pending_scroll (text_view->pending_scroll);
1490
1491   text_view->pending_scroll = scroll;
1492 }
1493
1494 static gboolean
1495 gtk_text_view_flush_scroll (GtkTextView *text_view)
1496 {
1497   GtkTextIter iter;
1498   GtkTextPendingScroll *scroll;
1499   gboolean retval;
1500
1501   DV(g_print(G_STRLOC"\n"));
1502
1503   if (text_view->pending_scroll == NULL)
1504     return FALSE;
1505
1506   scroll = text_view->pending_scroll;
1507
1508   /* avoid recursion */
1509   text_view->pending_scroll = NULL;
1510
1511   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, scroll->mark);
1512
1513   /* Validate arbitrary area around the scroll destination, so the adjustment
1514    * can meaningfully point into that area
1515    */
1516   DV(g_print (">Validating scroll destination ("G_STRLOC")\n"));
1517   gtk_text_layout_validate_yrange (text_view->layout, &iter, -300, 300);
1518
1519   DV(g_print (">Done validating scroll destination ("G_STRLOC")\n"));
1520
1521   /* Ensure we have updated width/height */
1522   gtk_text_view_update_adjustments (text_view);
1523
1524   retval = gtk_text_view_scroll_to_iter (text_view,
1525                                          &iter,
1526                                          scroll->within_margin,
1527                                          scroll->use_align,
1528                                          scroll->xalign,
1529                                          scroll->yalign);
1530
1531   free_pending_scroll (scroll);
1532
1533   return retval;
1534 }
1535
1536 static void
1537 gtk_text_view_set_adjustment_upper (GtkAdjustment *adj, gdouble upper)
1538 {
1539   if (upper != adj->upper)
1540     {
1541       gdouble min = MAX (0.0, upper - adj->page_size);
1542       gboolean value_changed = FALSE;
1543
1544       adj->upper = upper;
1545
1546       if (adj->value > min)
1547         {
1548           adj->value = min;
1549           value_changed = TRUE;
1550         }
1551
1552       gtk_signal_emit_by_name (GTK_OBJECT (adj), "changed");
1553       DV(g_print(">Changed adj upper to %g ("G_STRLOC")\n", upper));
1554
1555       if (value_changed)
1556         {
1557           DV(g_print(">Changed adj value because upper decreased ("G_STRLOC")\n"));
1558           gtk_signal_emit_by_name (GTK_OBJECT (adj), "value_changed");
1559         }
1560     }
1561 }
1562
1563 static void
1564 gtk_text_view_update_adjustments (GtkTextView *text_view)
1565 {
1566   gint width = 0, height = 0;
1567
1568   DV(g_print(">Updating adjustments ("G_STRLOC")\n"));
1569
1570   if (text_view->layout)
1571     gtk_text_layout_get_size (text_view->layout, &width, &height);
1572
1573   if (text_view->width != width || text_view->height != height)
1574     {
1575       text_view->width = width;
1576       text_view->height = height;
1577
1578       gtk_text_view_set_adjustment_upper (get_hadjustment (text_view),
1579                                           MAX (SCREEN_WIDTH (text_view), width));
1580       gtk_text_view_set_adjustment_upper (get_vadjustment (text_view),
1581                                           MAX (SCREEN_HEIGHT (text_view), height));
1582
1583       /* hadj/vadj exist since we called get_hadjustment/get_vadjustment above */
1584
1585       /* Set up the step sizes; we'll say that a page is
1586          our allocation minus one step, and a step is
1587          1/10 of our allocation. */
1588       text_view->hadjustment->step_increment =
1589         SCREEN_WIDTH (text_view) / 10.0;
1590       text_view->hadjustment->page_increment =
1591         SCREEN_WIDTH (text_view) * 0.9;
1592
1593       text_view->vadjustment->step_increment =
1594         SCREEN_HEIGHT (text_view) / 10.0;
1595       text_view->vadjustment->page_increment =
1596         SCREEN_HEIGHT (text_view) * 0.9;
1597
1598       gtk_signal_emit_by_name (GTK_OBJECT (get_hadjustment (text_view)), "changed");
1599       gtk_signal_emit_by_name (GTK_OBJECT (get_hadjustment (text_view)), "changed");
1600     }
1601 }
1602
1603 static void
1604 gtk_text_view_update_layout_width (GtkTextView *text_view)
1605 {
1606   DV(g_print(">Updating layout width ("G_STRLOC")\n"));
1607
1608   gtk_text_view_ensure_layout (text_view);
1609
1610   gtk_text_layout_set_screen_width (text_view->layout,
1611                                     SCREEN_WIDTH (text_view));
1612 }
1613
1614 static void
1615 gtk_text_view_update_im_spot_location (GtkTextView *text_view)
1616 {
1617   GdkRectangle area;
1618   gint cursor_x_pos, cursor_y_pos;
1619
1620   if (text_view->layout == NULL)
1621     return;
1622
1623   gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, &cursor_y_pos);
1624
1625   area.x = cursor_x_pos;
1626   area.y = cursor_y_pos;
1627   area.width = area.height = 0;
1628
1629   gtk_im_context_set_cursor_location (text_view->im_context, &area);
1630 }
1631
1632 /**
1633  * gtk_text_view_scroll_to_mark:
1634  * @text_view: a #GtkTextView
1635  * @mark: a #GtkTextMark
1636  * @within_margin: margin as a [0.0,0.5) fraction of screen size
1637  * @use_align: whether to use alignment arguments (if %FALSE, just get the mark onscreen)
1638  * @xalign: horizontal alignment of mark within visible area.
1639  * @yalign: vertical alignment of mark within visible area
1640  *
1641  * Scrolls @text_view so that @mark is on the screen in the position
1642  * indicated by @xalign and @yalign. An alignment of 0.0 indicates
1643  * left or top, 1.0 indicates right or bottom, 0.5 means center. If @use_align
1644  * is %FALSE, the text scrolls the minimal distance to get the mark onscreen,
1645  * possibly not scrolling at all. The effective screen for purposes
1646  * of this function is reduced by a margin of size @within_margin.
1647  *
1648  **/
1649 void
1650 gtk_text_view_scroll_to_mark (GtkTextView *text_view,
1651                               GtkTextMark *mark,
1652                               gdouble      within_margin,
1653                               gboolean     use_align,
1654                               gdouble      xalign,
1655                               gdouble      yalign)
1656 {
1657   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1658   g_return_if_fail (GTK_IS_TEXT_MARK (mark));
1659   g_return_if_fail (within_margin >= 0.0 && within_margin < 0.5);
1660   g_return_if_fail (xalign >= 0.0 && xalign <= 1.0);
1661   g_return_if_fail (yalign >= 0.0 && yalign <= 1.0);
1662
1663   gtk_text_view_queue_scroll (text_view, mark,
1664                               within_margin,
1665                               use_align,
1666                               xalign,
1667                               yalign);
1668
1669   /* If no validation is pending, we need to go ahead and force an
1670    * immediate scroll.
1671    */
1672   if (text_view->layout &&
1673       gtk_text_layout_is_valid (text_view->layout))
1674     gtk_text_view_flush_scroll (text_view);
1675 }
1676
1677 void
1678 gtk_text_view_scroll_mark_onscreen (GtkTextView *text_view,
1679                                     GtkTextMark *mark)
1680 {
1681   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1682   g_return_if_fail (GTK_IS_TEXT_MARK (mark));
1683
1684   gtk_text_view_scroll_to_mark (text_view, mark, 0.0, FALSE, 0.0, 0.0);
1685 }
1686
1687 static gboolean
1688 clamp_iter_onscreen (GtkTextView *text_view, GtkTextIter *iter)
1689 {
1690   GdkRectangle visible_rect;
1691   gtk_text_view_get_visible_rect (text_view, &visible_rect);
1692
1693   return gtk_text_layout_clamp_iter_to_vrange (text_view->layout, iter,
1694                                                visible_rect.y,
1695                                                visible_rect.y + visible_rect.height);
1696 }
1697
1698 /**
1699  * gtk_text_view_move_mark_onscreen:
1700  * @text_view: a #GtkTextView
1701  * @mark: a #GtkTextMark
1702  *
1703  * Moves a mark within the buffer so that it's
1704  * located within the currently-visible text area.
1705  *
1706  * Return value: %TRUE if the mark moved (wasn't already onscreen)
1707  **/
1708 gboolean
1709 gtk_text_view_move_mark_onscreen (GtkTextView *text_view,
1710                                   GtkTextMark *mark)
1711 {
1712   GtkTextIter iter;
1713
1714   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1715   g_return_val_if_fail (mark != NULL, FALSE);
1716
1717   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
1718
1719   if (clamp_iter_onscreen (text_view, &iter))
1720     {
1721       gtk_text_buffer_move_mark (get_buffer (text_view), mark, &iter);
1722       return TRUE;
1723     }
1724   else
1725     return FALSE;
1726 }
1727
1728 /**
1729  * gtk_text_view_get_visible_rect:
1730  * @text_view: a #GtkTextView
1731  * @visible_rect: rectangle to fill
1732  *
1733  * Fills @visible_rect with the currently-visible
1734  * region of the buffer, in buffer coordinates. Convert to window coordinates
1735  * with gtk_text_view_buffer_to_window_coords().
1736  **/
1737 void
1738 gtk_text_view_get_visible_rect (GtkTextView  *text_view,
1739                                 GdkRectangle *visible_rect)
1740 {
1741   GtkWidget *widget;
1742
1743   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1744
1745   widget = GTK_WIDGET (text_view);
1746
1747   if (visible_rect)
1748     {
1749       visible_rect->x = text_view->xoffset;
1750       visible_rect->y = text_view->yoffset;
1751       visible_rect->width = SCREEN_WIDTH (widget);
1752       visible_rect->height = SCREEN_HEIGHT (widget);
1753
1754       DV(g_print(" visible rect: %d,%d %d x %d\n",
1755                  visible_rect->x,
1756                  visible_rect->y,
1757                  visible_rect->width,
1758                  visible_rect->height));
1759     }
1760 }
1761
1762 /**
1763  * gtk_text_view_set_wrap_mode:
1764  * @text_view: a #GtkTextView
1765  * @wrap_mode: a #GtkWrapMode
1766  *
1767  * Sets the line wrapping for the view.
1768  **/
1769 void
1770 gtk_text_view_set_wrap_mode (GtkTextView *text_view,
1771                              GtkWrapMode  wrap_mode)
1772 {
1773   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1774
1775   if (text_view->wrap_mode != wrap_mode)
1776     {
1777       text_view->wrap_mode = wrap_mode;
1778
1779       if (text_view->layout)
1780         {
1781           text_view->layout->default_style->wrap_mode = wrap_mode;
1782           gtk_text_layout_default_style_changed (text_view->layout);
1783         }
1784     }
1785
1786   g_object_notify (G_OBJECT (text_view), "wrap_mode");
1787 }
1788
1789 /**
1790  * gtk_text_view_get_wrap_mode:
1791  * @text_view: a #GtkTextView
1792  *
1793  * Gets the line wrapping for the view.
1794  *
1795  * Return value: the line wrap setting
1796  **/
1797 GtkWrapMode
1798 gtk_text_view_get_wrap_mode (GtkTextView *text_view)
1799 {
1800   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_WRAP_NONE);
1801
1802   return text_view->wrap_mode;
1803 }
1804
1805 /**
1806  * gtk_text_view_set_editable:
1807  * @text_view: a #GtkTextView
1808  * @setting: whether it's editable
1809  *
1810  * Sets the default editability of the #GtkTextView. You can override
1811  * this default setting with tags in the buffer, using the "editable"
1812  * attribute of tags.
1813  **/
1814 void
1815 gtk_text_view_set_editable (GtkTextView *text_view,
1816                             gboolean     setting)
1817 {
1818   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1819
1820   if (text_view->editable != setting)
1821     {
1822       text_view->editable = setting;
1823
1824       if (text_view->layout)
1825         {
1826           text_view->layout->default_style->editable = text_view->editable;
1827           gtk_text_layout_default_style_changed (text_view->layout);
1828         }
1829     }
1830
1831   g_object_notify (G_OBJECT (text_view), "editable");
1832 }
1833
1834 /**
1835  * gtk_text_view_get_editable:
1836  * @text_view: a #GtkTextView
1837  *
1838  * Returns the default editability of the #GtkTextView. Tags in the
1839  * buffer may override this setting for some ranges of text.
1840  *
1841  * Return value: whether text is editable by default
1842  **/
1843 gboolean
1844 gtk_text_view_get_editable (GtkTextView *text_view)
1845 {
1846   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1847
1848   return text_view->editable;
1849 }
1850
1851 void
1852 gtk_text_view_set_pixels_above_lines (GtkTextView *text_view,
1853                                       gint         pixels_above_lines)
1854 {
1855   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1856
1857   if (text_view->pixels_above_lines != pixels_above_lines)
1858     {
1859       text_view->pixels_above_lines = pixels_above_lines;
1860
1861       if (text_view->layout)
1862         {
1863           text_view->layout->default_style->pixels_above_lines = pixels_above_lines;
1864           gtk_text_layout_default_style_changed (text_view->layout);
1865         }
1866     }
1867
1868   g_object_notify (G_OBJECT (text_view), "pixels_above_lines");
1869 }
1870
1871 gint
1872 gtk_text_view_get_pixels_above_lines (GtkTextView *text_view)
1873 {
1874   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1875
1876   return text_view->pixels_above_lines;
1877 }
1878
1879 void
1880 gtk_text_view_set_pixels_below_lines (GtkTextView *text_view,
1881                                       gint         pixels_below_lines)
1882 {
1883   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1884
1885   if (text_view->pixels_below_lines != pixels_below_lines)
1886     {
1887       text_view->pixels_below_lines = pixels_below_lines;
1888
1889       if (text_view->layout)
1890         {
1891           text_view->layout->default_style->pixels_below_lines = pixels_below_lines;
1892           gtk_text_layout_default_style_changed (text_view->layout);
1893         }
1894     }
1895
1896   g_object_notify (G_OBJECT (text_view), "pixels_below_lines");
1897 }
1898
1899 gint
1900 gtk_text_view_get_pixels_below_lines (GtkTextView *text_view)
1901 {
1902   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1903
1904   return text_view->pixels_below_lines;
1905 }
1906
1907 void
1908 gtk_text_view_set_pixels_inside_wrap (GtkTextView *text_view,
1909                                       gint         pixels_inside_wrap)
1910 {
1911   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1912
1913   if (text_view->pixels_inside_wrap != pixels_inside_wrap)
1914     {
1915       text_view->pixels_inside_wrap = pixels_inside_wrap;
1916
1917       if (text_view->layout)
1918         {
1919           text_view->layout->default_style->pixels_inside_wrap = pixels_inside_wrap;
1920           gtk_text_layout_default_style_changed (text_view->layout);
1921         }
1922     }
1923   g_object_notify (G_OBJECT (text_view), "pixels_inside_wrap");
1924 }
1925
1926 gint
1927 gtk_text_view_get_pixels_inside_wrap (GtkTextView *text_view)
1928 {
1929   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1930
1931   return text_view->pixels_inside_wrap;
1932 }
1933
1934 void
1935 gtk_text_view_set_justification (GtkTextView     *text_view,
1936                                  GtkJustification justify)
1937 {
1938   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1939
1940   if (text_view->justify != justify)
1941     {
1942       text_view->justify = justify;
1943
1944       if (text_view->layout)
1945         {
1946           text_view->layout->default_style->justification = justify;
1947           gtk_text_layout_default_style_changed (text_view->layout);
1948         }
1949     }
1950
1951   g_object_notify (G_OBJECT (text_view), "justification");
1952 }
1953
1954 GtkJustification
1955 gtk_text_view_get_justification (GtkTextView *text_view)
1956 {
1957   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_JUSTIFY_LEFT);
1958
1959   return text_view->justify;
1960 }
1961
1962 void
1963 gtk_text_view_set_left_margin (GtkTextView *text_view,
1964                                gint         left_margin)
1965 {
1966   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1967
1968   if (text_view->left_margin != left_margin)
1969     {
1970       text_view->left_margin = left_margin;
1971
1972       if (text_view->layout)
1973         {
1974           text_view->layout->default_style->left_margin = left_margin;
1975           gtk_text_layout_default_style_changed (text_view->layout);
1976         }
1977     }
1978
1979   g_object_notify (G_OBJECT (text_view), "left_margin");
1980 }
1981
1982 gint
1983 gtk_text_view_get_left_margin (GtkTextView *text_view)
1984 {
1985   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1986
1987   return text_view->left_margin;
1988 }
1989
1990 void
1991 gtk_text_view_set_right_margin (GtkTextView *text_view,
1992                                 gint         right_margin)
1993 {
1994   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1995
1996   if (text_view->right_margin != right_margin)
1997     {
1998       text_view->right_margin = right_margin;
1999
2000       if (text_view->layout)
2001         {
2002           text_view->layout->default_style->right_margin = right_margin;
2003           gtk_text_layout_default_style_changed (text_view->layout);
2004         }
2005     }
2006
2007   g_object_notify (G_OBJECT (text_view), "right_margin");
2008 }
2009
2010 gint
2011 gtk_text_view_get_right_margin (GtkTextView *text_view)
2012 {
2013   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2014
2015   return text_view->right_margin;
2016 }
2017
2018 void
2019 gtk_text_view_set_indent (GtkTextView *text_view,
2020                           gint         indent)
2021 {
2022   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2023
2024   if (text_view->indent != indent)
2025     {
2026       text_view->indent = indent;
2027
2028       if (text_view->layout)
2029         {
2030           text_view->layout->default_style->indent = indent;
2031           gtk_text_layout_default_style_changed (text_view->layout);
2032         }
2033     }
2034   g_object_notify (G_OBJECT (text_view), "indent");
2035 }
2036
2037 gint
2038 gtk_text_view_get_indent (GtkTextView *text_view)
2039 {
2040   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
2041
2042   return text_view->indent;
2043 }
2044
2045 void
2046 gtk_text_view_set_tabs (GtkTextView   *text_view,
2047                         PangoTabArray *tabs)
2048 {
2049   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2050
2051   if (text_view->tabs)
2052     pango_tab_array_free (text_view->tabs);
2053
2054   text_view->tabs = tabs ? pango_tab_array_copy (tabs) : NULL;
2055
2056   if (text_view->layout)
2057     {
2058       /* some unkosher futzing in internal struct details... */
2059       if (text_view->layout->default_style->tabs)
2060         pango_tab_array_free (text_view->layout->default_style->tabs);
2061
2062       text_view->layout->default_style->tabs =
2063         text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
2064
2065       gtk_text_layout_default_style_changed (text_view->layout);
2066     }
2067
2068   g_object_notify (G_OBJECT (text_view), "tabs");
2069 }
2070
2071 PangoTabArray*
2072 gtk_text_view_get_tabs (GtkTextView *text_view)
2073 {
2074   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
2075
2076   return text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
2077 }
2078
2079 /**
2080  * gtk_text_view_set_cursor_visible:
2081  * @text_view: a #GtkTextView
2082  * @setting: whether to show the insertion cursor
2083  *
2084  * Toggles whether the insertion point is displayed. A buffer with no editable
2085  * text probably shouldn't have a visible cursor, so you may want to turn
2086  * the cursor off.
2087  **/
2088 void
2089 gtk_text_view_set_cursor_visible    (GtkTextView   *text_view,
2090                                      gboolean       setting)
2091 {
2092   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
2093
2094   setting = (setting != FALSE);
2095
2096   if (text_view->cursor_visible != setting)
2097     {
2098       text_view->cursor_visible = setting;
2099
2100       if (GTK_WIDGET_HAS_FOCUS (text_view))
2101         {
2102           if (text_view->layout)
2103             {
2104               gtk_text_layout_set_cursor_visible (text_view->layout, setting);
2105               gtk_text_view_check_cursor_blink (text_view);
2106             }
2107         }
2108     }
2109
2110   g_object_notify (G_OBJECT (text_view), "cursor_visible");
2111 }
2112
2113 /**
2114  * gtk_text_view_get_cursor_visible:
2115  * @text_view: a #GtkTextView
2116  *
2117  * Find out whether the cursor is being displayed.
2118  *
2119  * Return value: whether the insertion mark is visible
2120  **/
2121 gboolean
2122 gtk_text_view_get_cursor_visible    (GtkTextView   *text_view)
2123 {
2124   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
2125
2126   return text_view->cursor_visible;
2127 }
2128
2129
2130 /**
2131  * gtk_text_view_place_cursor_onscreen:
2132  * @text_view: a #GtkTextView
2133  *
2134  * Moves the cursor to the currently visible region of the
2135  * buffer, it it isn't there already.
2136  *
2137  * Return value: TRUE if the cursor had to be moved.
2138  **/
2139 gboolean
2140 gtk_text_view_place_cursor_onscreen (GtkTextView *text_view)
2141 {
2142   GtkTextIter insert;
2143
2144   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
2145
2146   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
2147                                     gtk_text_buffer_get_mark (get_buffer (text_view),
2148                                                               "insert"));
2149
2150   if (clamp_iter_onscreen (text_view, &insert))
2151     {
2152       gtk_text_buffer_place_cursor (get_buffer (text_view), &insert);
2153       return TRUE;
2154     }
2155   else
2156     return FALSE;
2157 }
2158
2159 static void
2160 gtk_text_view_destroy (GtkObject *object)
2161 {
2162   GtkTextView *text_view;
2163   GtkTextLayout *layout;
2164
2165   text_view = GTK_TEXT_VIEW (object);
2166
2167   layout = text_view->layout;
2168
2169   gtk_text_view_destroy_layout (text_view);
2170   gtk_text_view_set_buffer (text_view, NULL);
2171
2172   (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
2173 }
2174
2175 static void
2176 gtk_text_view_finalize (GObject *object)
2177 {
2178   GtkTextView *text_view;
2179
2180   text_view = GTK_TEXT_VIEW (object);
2181
2182   g_return_if_fail (text_view->buffer == NULL);
2183
2184   gtk_text_view_destroy_layout (text_view);
2185   gtk_text_view_set_buffer (text_view, NULL);
2186
2187   if (text_view->pending_scroll)
2188     {
2189       free_pending_scroll (text_view->pending_scroll);
2190       text_view->pending_scroll = NULL;
2191     }
2192
2193   if (text_view->hadjustment)
2194     g_object_unref (G_OBJECT (text_view->hadjustment));
2195   if (text_view->vadjustment)
2196     g_object_unref (G_OBJECT (text_view->vadjustment));
2197
2198   text_window_free (text_view->text_window);
2199
2200   if (text_view->left_window)
2201     text_window_free (text_view->left_window);
2202
2203   if (text_view->top_window)
2204     text_window_free (text_view->top_window);
2205
2206   if (text_view->right_window)
2207     text_window_free (text_view->right_window);
2208
2209   if (text_view->bottom_window)
2210     text_window_free (text_view->bottom_window);
2211
2212   g_object_unref (G_OBJECT (text_view->im_context));
2213
2214   (* G_OBJECT_CLASS (parent_class)->finalize) (object);
2215 }
2216
2217 static void
2218 gtk_text_view_set_property (GObject         *object,
2219                             guint            prop_id,
2220                             const GValue    *value,
2221                             GParamSpec      *pspec)
2222 {
2223   GtkTextView *text_view;
2224
2225   text_view = GTK_TEXT_VIEW (object);
2226
2227   switch (prop_id)
2228     {
2229     case PROP_PIXELS_ABOVE_LINES:
2230       gtk_text_view_set_pixels_above_lines (text_view, g_value_get_int (value));
2231       break;
2232
2233     case PROP_PIXELS_BELOW_LINES:
2234       gtk_text_view_set_pixels_below_lines (text_view, g_value_get_int (value));
2235       break;
2236
2237     case PROP_PIXELS_INSIDE_WRAP:
2238       gtk_text_view_set_pixels_inside_wrap (text_view, g_value_get_int (value));
2239       break;
2240
2241     case PROP_EDITABLE:
2242       gtk_text_view_set_editable (text_view, g_value_get_boolean (value));
2243       break;
2244
2245     case PROP_WRAP_MODE:
2246       gtk_text_view_set_wrap_mode (text_view, g_value_get_enum (value));
2247       break;
2248
2249     case PROP_JUSTIFICATION:
2250       gtk_text_view_set_justification (text_view, g_value_get_enum (value));
2251       break;
2252
2253     case PROP_LEFT_MARGIN:
2254       gtk_text_view_set_left_margin (text_view, g_value_get_int (value));
2255       break;
2256
2257     case PROP_RIGHT_MARGIN:
2258       gtk_text_view_set_right_margin (text_view, g_value_get_int (value));
2259       break;
2260
2261     case PROP_INDENT:
2262       gtk_text_view_set_indent (text_view, g_value_get_int (value));
2263       break;
2264
2265     case PROP_TABS:
2266       gtk_text_view_set_tabs (text_view, g_value_get_object (value));
2267       break;
2268
2269     case PROP_CURSOR_VISIBLE:
2270       gtk_text_view_set_cursor_visible (text_view, g_value_get_boolean (value));
2271       break;
2272
2273     default:
2274       g_assert_not_reached ();
2275       break;
2276     }
2277 }
2278
2279 static void
2280 gtk_text_view_get_property (GObject         *object,
2281                             guint            prop_id,
2282                             GValue          *value,
2283                             GParamSpec      *pspec)
2284 {
2285   GtkTextView *text_view;
2286
2287   text_view = GTK_TEXT_VIEW (object);
2288
2289   switch (prop_id)
2290     {
2291     case PROP_PIXELS_ABOVE_LINES:
2292       g_value_set_int (value, text_view->pixels_above_lines);
2293       break;
2294
2295     case PROP_PIXELS_BELOW_LINES:
2296       g_value_set_int (value, text_view->pixels_below_lines);
2297       break;
2298
2299     case PROP_PIXELS_INSIDE_WRAP:
2300       g_value_set_int (value, text_view->pixels_inside_wrap);
2301       break;
2302
2303     case PROP_EDITABLE:
2304       g_value_set_boolean (value, text_view->editable);
2305       break;
2306
2307     case PROP_WRAP_MODE:
2308       g_value_set_enum (value, text_view->wrap_mode);
2309       break;
2310
2311     case PROP_JUSTIFICATION:
2312       g_value_set_enum (value, text_view->justify);
2313       break;
2314
2315     case PROP_LEFT_MARGIN:
2316       g_value_set_int (value, text_view->left_margin);
2317       break;
2318
2319     case PROP_RIGHT_MARGIN:
2320       g_value_set_int (value, text_view->right_margin);
2321       break;
2322
2323     case PROP_INDENT:
2324       g_value_set_int (value, text_view->indent);
2325       break;
2326
2327     case PROP_TABS:
2328       g_value_set_object (value, gtk_text_view_get_tabs (text_view));
2329       break;
2330
2331     case PROP_CURSOR_VISIBLE:
2332       g_value_set_boolean (value, text_view->cursor_visible);
2333       break;
2334
2335     default:
2336       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2337       break;
2338     }
2339 }
2340
2341 static void
2342 gtk_text_view_size_request (GtkWidget      *widget,
2343                             GtkRequisition *requisition)
2344 {
2345   GtkTextView *text_view;
2346   GSList *tmp_list;
2347   gint focus_edge_width;
2348   gboolean interior_focus;
2349
2350   text_view = GTK_TEXT_VIEW (widget);
2351
2352   gtk_widget_style_get (widget, "interior_focus", &interior_focus, NULL);
2353
2354   if (interior_focus)
2355     focus_edge_width = 0;
2356   else
2357     focus_edge_width = 1;
2358
2359   if (text_view->layout)
2360     {
2361       text_view->text_window->requisition.width = text_view->layout->width;
2362       text_view->text_window->requisition.height = text_view->layout->height;
2363     }
2364   else
2365     {
2366       text_view->text_window->requisition.width = 0;
2367       text_view->text_window->requisition.height = 0;
2368     }
2369
2370   requisition->width = text_view->text_window->requisition.width + focus_edge_width * 2;
2371   requisition->height = text_view->text_window->requisition.height + focus_edge_width * 2;
2372
2373   if (text_view->left_window)
2374     requisition->width += text_view->left_window->requisition.width;
2375
2376   if (text_view->right_window)
2377     requisition->width += text_view->right_window->requisition.width;
2378
2379   if (text_view->top_window)
2380     requisition->height += text_view->top_window->requisition.height;
2381
2382   if (text_view->bottom_window)
2383     requisition->height += text_view->bottom_window->requisition.height;
2384
2385   tmp_list = text_view->children;
2386   while (tmp_list != NULL)
2387     {
2388       GtkTextViewChild *child = tmp_list->data;
2389
2390       if (child->anchor)
2391         {
2392           GtkRequisition child_req;
2393           GtkRequisition old_req;
2394
2395           old_req = child->widget->requisition;
2396
2397           gtk_widget_size_request (child->widget, &child_req);
2398
2399           if (text_view->layout &&
2400               (old_req.width != child_req.width ||
2401                old_req.height != child_req.height))
2402             gtk_text_child_anchor_queue_resize (child->anchor,
2403                                                 text_view->layout);
2404         }
2405       else
2406         {
2407
2408         }
2409
2410       tmp_list = g_slist_next (tmp_list);
2411     }
2412 }
2413
2414 static void
2415 gtk_text_view_update_child_allocation (GtkTextView      *text_view,
2416                                        GtkTextViewChild *vc)
2417 {
2418   gint buffer_y;
2419   GtkTextIter iter;
2420   GtkAllocation allocation;
2421
2422   gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
2423                                             &iter,
2424                                             vc->anchor);
2425
2426   gtk_text_layout_get_line_yrange (text_view->layout, &iter,
2427                                    &buffer_y, NULL);
2428
2429   buffer_y += vc->from_top_of_line;
2430
2431   allocation.x = vc->from_left_of_buffer;
2432   allocation.y = buffer_y;
2433   allocation.width = vc->widget->requisition.width;
2434   allocation.height = vc->widget->requisition.height;
2435
2436   gtk_widget_size_allocate (vc->widget, &allocation);
2437 }
2438
2439 static void
2440 gtk_text_view_child_allocated (GtkTextLayout *layout,
2441                                GtkWidget     *child,
2442                                gint           x,
2443                                gint           y,
2444                                gpointer       data)
2445 {
2446   GtkTextViewChild *vc = NULL;
2447   GtkTextView *text_view = data;
2448
2449   /* x,y is the position of the child from the top of the line, and
2450    * from the left of the buffer. We have to translate that into text
2451    * window coordinates, then size_allocate the child.
2452    */
2453
2454   vc = g_object_get_data (G_OBJECT (child),
2455                             "gtk-text-view-child");
2456
2457   g_assert (vc != NULL);
2458
2459   g_print ("child allocated at %d,%d\n", x, y);
2460
2461   vc->from_left_of_buffer = x;
2462   vc->from_top_of_line = y;
2463
2464   gtk_text_view_update_child_allocation (text_view, vc);
2465 }
2466
2467 static void
2468 gtk_text_view_validate_children (GtkTextView *text_view)
2469 {
2470   GSList *tmp_list;
2471
2472   DV(g_print(G_STRLOC"\n"));
2473
2474   tmp_list = text_view->children;
2475   while (tmp_list != NULL)
2476     {
2477       GtkTextViewChild *child = tmp_list->data;
2478
2479       if (child->anchor)
2480         {
2481           /* We need to force-validate the regions containing
2482            * children.
2483            */
2484           GtkTextIter child_loc;
2485           gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
2486                                                     &child_loc,
2487                                                     child->anchor);
2488
2489           gtk_text_layout_validate_yrange (text_view->layout,
2490                                            &child_loc,
2491                                            0, 1);
2492         }
2493       else
2494         {
2495
2496         }
2497
2498       tmp_list = g_slist_next (tmp_list);
2499     }
2500 }
2501
2502 static void
2503 gtk_text_view_size_allocate (GtkWidget *widget,
2504                              GtkAllocation *allocation)
2505 {
2506   GtkTextView *text_view;
2507   GtkTextIter first_para;
2508   gint y;
2509   GtkAdjustment *vadj;
2510   gboolean yoffset_changed = FALSE;
2511   gint width, height;
2512   GdkRectangle text_rect;
2513   GdkRectangle left_rect;
2514   GdkRectangle right_rect;
2515   GdkRectangle top_rect;
2516   GdkRectangle bottom_rect;
2517   gint focus_edge_width;
2518   gboolean interior_focus;
2519
2520   text_view = GTK_TEXT_VIEW (widget);
2521
2522   DV(g_print(G_STRLOC"\n"));
2523
2524   widget->allocation = *allocation;
2525
2526   if (GTK_WIDGET_REALIZED (widget))
2527     {
2528       gdk_window_move_resize (widget->window,
2529                               allocation->x, allocation->y,
2530                               allocation->width, allocation->height);
2531     }
2532
2533   /* distribute width/height among child windows. Ensure all
2534    * windows get at least a 1x1 allocation.
2535    */
2536
2537   gtk_widget_style_get (widget, "interior_focus", &interior_focus, NULL);
2538
2539   if (interior_focus)
2540     focus_edge_width = 0;
2541   else
2542     focus_edge_width = 1;
2543
2544   width = allocation->width - focus_edge_width * 2;
2545
2546   if (text_view->left_window)
2547     left_rect.width = text_view->left_window->requisition.width;
2548   else
2549     left_rect.width = 1;
2550
2551   width -= left_rect.width;
2552
2553   if (text_view->right_window)
2554     right_rect.width = text_view->right_window->requisition.width;
2555   else
2556     right_rect.width = 1;
2557
2558   width -= right_rect.width;
2559
2560   text_rect.width = MAX (1, width);
2561
2562   top_rect.width = text_rect.width;
2563   bottom_rect.width = text_rect.width;
2564
2565
2566   height = allocation->height - focus_edge_width * 2;
2567
2568   if (text_view->top_window)
2569     top_rect.height = text_view->top_window->requisition.height;
2570   else
2571     top_rect.height = 1;
2572
2573   height -= top_rect.height;
2574
2575   if (text_view->bottom_window)
2576     bottom_rect.height = text_view->bottom_window->requisition.height;
2577   else
2578     bottom_rect.height = 1;
2579
2580   height -= bottom_rect.height;
2581
2582   text_rect.height = MAX (1, height);
2583
2584   left_rect.height = text_rect.height;
2585   right_rect.height = text_rect.height;
2586
2587   /* Origins */
2588   left_rect.x = focus_edge_width;
2589   top_rect.y = focus_edge_width;
2590
2591   text_rect.x = left_rect.x + left_rect.width;
2592   text_rect.y = top_rect.y + top_rect.height;
2593
2594   left_rect.y = text_rect.y;
2595   right_rect.y = text_rect.y;
2596
2597   top_rect.x = text_rect.x;
2598   bottom_rect.x = text_rect.x;
2599
2600   right_rect.x = text_rect.x + text_rect.width;
2601   bottom_rect.y = text_rect.y + text_rect.height;
2602
2603   text_window_size_allocate (text_view->text_window,
2604                              &text_rect);
2605
2606   if (text_view->left_window)
2607     text_window_size_allocate (text_view->left_window,
2608                                &left_rect);
2609
2610   if (text_view->right_window)
2611     text_window_size_allocate (text_view->right_window,
2612                                &right_rect);
2613
2614   if (text_view->top_window)
2615     text_window_size_allocate (text_view->top_window,
2616                                &top_rect);
2617
2618   if (text_view->bottom_window)
2619     text_window_size_allocate (text_view->bottom_window,
2620                                &bottom_rect);
2621
2622   gtk_text_view_update_layout_width (text_view);
2623
2624   /* This is because validating children ends up size allocating them. */
2625   gtk_text_view_validate_children (text_view);
2626
2627   /* Now adjust the value of the adjustment to keep the cursor at the
2628    * same place in the buffer
2629    */
2630   gtk_text_view_get_first_para_iter (text_view, &first_para);
2631   gtk_text_layout_get_line_yrange (text_view->layout, &first_para, &y, NULL);
2632
2633   y += text_view->first_para_pixels;
2634
2635   /* Ensure h/v adj exist */
2636   get_hadjustment (text_view);
2637   get_vadjustment (text_view);
2638
2639   vadj = text_view->vadjustment;
2640   if (y > vadj->upper - vadj->page_size)
2641     y = MAX (0, vadj->upper - vadj->page_size);
2642
2643   if (y != text_view->yoffset)
2644     {
2645       vadj->value = text_view->yoffset = y;
2646       yoffset_changed = TRUE;
2647     }
2648
2649   text_view->hadjustment->page_size = SCREEN_WIDTH (text_view);
2650   text_view->hadjustment->page_increment = SCREEN_WIDTH (text_view) / 2;
2651   text_view->hadjustment->lower = 0;
2652   text_view->hadjustment->upper = MAX (SCREEN_WIDTH (text_view),
2653                                        text_view->width);
2654   gtk_signal_emit_by_name (GTK_OBJECT (text_view->hadjustment), "changed");
2655
2656   text_view->vadjustment->page_size = SCREEN_HEIGHT (text_view);
2657   text_view->vadjustment->page_increment = SCREEN_HEIGHT (text_view) / 2;
2658   text_view->vadjustment->lower = 0;
2659   text_view->vadjustment->upper = MAX (SCREEN_HEIGHT (text_view),
2660                                        text_view->height);
2661   gtk_signal_emit_by_name (GTK_OBJECT (text_view->vadjustment), "changed");
2662
2663   if (yoffset_changed)
2664     gtk_adjustment_value_changed (vadj);
2665
2666   if (text_view->first_validate_idle != 0)
2667     {
2668       /* The GTK resize loop processes all the pending exposes right
2669        * after doing the resize stuff, so the idle sizer won't have a
2670        * chance to run. So we do the work here.
2671        */
2672
2673       g_source_remove (text_view->first_validate_idle);
2674       text_view->first_validate_idle = 0;
2675
2676       if (!gtk_text_view_flush_scroll (text_view))
2677         gtk_text_view_validate_onscreen (text_view);
2678     }
2679 }
2680
2681 static void
2682 gtk_text_view_get_first_para_iter (GtkTextView *text_view,
2683                                    GtkTextIter *iter)
2684 {
2685   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), iter,
2686                                     text_view->first_para_mark);
2687 }
2688
2689 static void
2690 gtk_text_view_validate_onscreen (GtkTextView *text_view)
2691 {
2692   GtkWidget *widget = GTK_WIDGET (text_view);
2693
2694   DV(g_print(">Validating onscreen ("G_STRLOC")\n"));
2695
2696   if (SCREEN_HEIGHT (widget) > 0)
2697     {
2698       GtkTextIter first_para;
2699
2700       /* Be sure we've validated the stuff onscreen; if we
2701        * scrolled, these calls won't have any effect, because
2702        * they were called in the recursive validate_onscreen
2703        */
2704       gtk_text_view_get_first_para_iter (text_view, &first_para);
2705
2706       gtk_text_layout_validate_yrange (text_view->layout,
2707                                        &first_para,
2708                                        0,
2709                                        text_view->first_para_pixels +
2710                                        SCREEN_HEIGHT (widget));
2711     }
2712
2713   text_view->onscreen_validated = TRUE;
2714
2715   DV(g_print(">Done validating onscreen, onscreen_validated = TRUE ("G_STRLOC")\n"));
2716
2717   /* This can have the odd side effect of triggering a scroll, which should
2718    * flip "onscreen_validated" back to FALSE, but should also get us
2719    * back into this function to turn it on again.
2720    */
2721   gtk_text_view_update_adjustments (text_view);
2722
2723   g_assert (text_view->onscreen_validated);
2724 }
2725
2726 static gboolean
2727 first_validate_callback (gpointer data)
2728 {
2729   GtkTextView *text_view = data;
2730
2731   GDK_THREADS_ENTER ();
2732
2733   /* Note that some of this code is duplicated at the end of size_allocate,
2734    * keep in sync with that.
2735    */
2736
2737   DV(g_print(G_STRLOC"\n"));
2738
2739   /* Do this first, which means that if an "invalidate"
2740    * occurs during any of this process, a new first_validate_callback
2741    * will be installed, and we'll start again.
2742    */
2743   text_view->first_validate_idle = 0;
2744
2745   /* be sure we have up-to-date screen size set on the
2746    * layout.
2747    */
2748   gtk_text_view_update_layout_width (text_view);
2749
2750   /* Bail out if we invalidated stuff; scrolling right away will just
2751    * confuse the issue.
2752    */
2753   if (text_view->first_validate_idle != 0)
2754     {
2755       DV(g_print(">Width change forced requeue ("G_STRLOC")\n"));
2756     }
2757   else
2758     {
2759       /* scroll to any marks, if that's pending. This can
2760        * jump us to the validation codepath used for scrolling
2761        * onscreen, if so we bail out.
2762        */
2763       if (!gtk_text_view_flush_scroll (text_view))
2764         gtk_text_view_validate_onscreen (text_view);
2765
2766       DV(g_print(">Leaving first validate idle ("G_STRLOC")\n"));
2767
2768       g_assert (text_view->onscreen_validated);
2769
2770     }
2771
2772   GDK_THREADS_LEAVE ();
2773
2774   return FALSE;
2775 }
2776
2777 static gboolean
2778 incremental_validate_callback (gpointer data)
2779 {
2780   GtkTextView *text_view = data;
2781   gboolean result = TRUE;
2782
2783   GDK_THREADS_ENTER ();
2784
2785   DV(g_print(G_STRLOC"\n"));
2786
2787   gtk_text_layout_validate (text_view->layout, 2000);
2788
2789   gtk_text_view_update_adjustments (text_view);
2790
2791   if (gtk_text_layout_is_valid (text_view->layout))
2792     {
2793       text_view->incremental_validate_idle = 0;
2794       result = FALSE;
2795     }
2796
2797   GDK_THREADS_LEAVE ();
2798
2799   return result;
2800 }
2801
2802 static void
2803 gtk_text_view_invalidate (GtkTextView *text_view)
2804 {
2805   text_view->onscreen_validated = FALSE;
2806
2807   DV(g_print(">Invalidate, onscreen_validated = FALSE ("G_STRLOC")\n"));
2808
2809   if (!text_view->first_validate_idle)
2810     {
2811       text_view->first_validate_idle = g_idle_add_full (GTK_PRIORITY_RESIZE - 2, first_validate_callback, text_view, NULL);
2812       DV (g_print (G_STRLOC": adding first validate idle %d\n",
2813                    text_view->first_validate_idle));
2814     }
2815
2816   if (!text_view->incremental_validate_idle)
2817     {
2818       text_view->incremental_validate_idle = g_idle_add_full (GTK_TEXT_VIEW_PRIORITY_VALIDATE, incremental_validate_callback, text_view, NULL);
2819       DV (g_print (G_STRLOC": adding incremental validate idle %d\n",
2820                    text_view->incremental_validate_idle));
2821     }
2822 }
2823
2824 static void
2825 invalidated_handler (GtkTextLayout *layout,
2826                      gpointer       data)
2827 {
2828   GtkTextView *text_view;
2829
2830   text_view = GTK_TEXT_VIEW (data);
2831
2832   gtk_text_view_invalidate (text_view);
2833 }
2834
2835 static void
2836 changed_handler (GtkTextLayout     *layout,
2837                  gint               start_y,
2838                  gint               old_height,
2839                  gint               new_height,
2840                  gpointer           data)
2841 {
2842   GtkTextView *text_view;
2843   GtkWidget *widget;
2844   GdkRectangle visible_rect;
2845   GdkRectangle redraw_rect;
2846
2847   text_view = GTK_TEXT_VIEW (data);
2848   widget = GTK_WIDGET (data);
2849
2850   DV(g_print(">Lines Validated ("G_STRLOC")\n"));
2851
2852   if (GTK_WIDGET_REALIZED (text_view))
2853     {
2854       gtk_text_view_get_visible_rect (text_view, &visible_rect);
2855
2856       redraw_rect.x = visible_rect.x;
2857       redraw_rect.width = visible_rect.width;
2858       redraw_rect.y = start_y;
2859
2860       if (old_height == new_height)
2861         redraw_rect.height = old_height;
2862       else
2863         redraw_rect.height = MAX (0, visible_rect.y + visible_rect.height - start_y);
2864
2865       if (gdk_rectangle_intersect (&redraw_rect, &visible_rect, &redraw_rect))
2866         {
2867           /* text_window_invalidate_rect() takes buffer coordinates */
2868           text_window_invalidate_rect (text_view->text_window,
2869                                        &redraw_rect);
2870
2871           DV(g_print(" invalidated rect: %d,%d %d x %d\n",
2872                      redraw_rect.x,
2873                      redraw_rect.y,
2874                      redraw_rect.width,
2875                      redraw_rect.height));
2876
2877           if (text_view->left_window)
2878             text_window_invalidate_rect (text_view->left_window,
2879                                          &redraw_rect);
2880           if (text_view->right_window)
2881             text_window_invalidate_rect (text_view->right_window,
2882                                          &redraw_rect);
2883           if (text_view->top_window)
2884             text_window_invalidate_rect (text_view->top_window,
2885                                          &redraw_rect);
2886           if (text_view->bottom_window)
2887             text_window_invalidate_rect (text_view->bottom_window,
2888                                          &redraw_rect);
2889         }
2890     }
2891
2892   if (old_height != new_height)
2893     {
2894       gboolean yoffset_changed = FALSE;
2895       GSList *tmp_list;
2896       int new_first_para_top;
2897       int old_first_para_top;
2898       GtkTextIter first;
2899
2900       /* If the bottom of the old area was above the top of the
2901        * screen, we need to scroll to keep the current top of the
2902        * screen in place.  Remember that first_para_pixels is the
2903        * position of the top of the screen in coordinates relative to
2904        * the first paragraph onscreen.
2905        *
2906        * In short we are adding the height delta of the portion of the
2907        * changed region above first_para_mark to text_view->yoffset.
2908        */
2909       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &first,
2910                                         text_view->first_para_mark);
2911
2912       gtk_text_layout_get_line_yrange (layout, &first, &new_first_para_top, NULL);
2913
2914       old_first_para_top = text_view->yoffset - text_view->first_para_pixels;
2915
2916       if (new_first_para_top != old_first_para_top)
2917         {
2918           text_view->yoffset += new_first_para_top - old_first_para_top;
2919
2920           get_vadjustment (text_view)->value = text_view->yoffset;
2921           yoffset_changed = TRUE;
2922         }
2923
2924       if (yoffset_changed)
2925         gtk_adjustment_value_changed (get_vadjustment (text_view));
2926
2927       /* FIXME be smarter about which anchored widgets we update */
2928
2929       tmp_list = text_view->children;
2930       while (tmp_list != NULL)
2931         {
2932           GtkTextViewChild *child = tmp_list->data;
2933
2934           if (child->anchor)
2935             gtk_text_view_update_child_allocation (text_view, child);
2936
2937           tmp_list = g_slist_next (tmp_list);
2938         }
2939     }
2940
2941   gtk_widget_queue_resize (widget);
2942 }
2943
2944 static void
2945 gtk_text_view_realize_cursor_gc (GtkTextView *text_view)
2946 {
2947   GdkColor *cursor_color;
2948   GdkColor red = { 0, 0xffff, 0x0000, 0x0000 };
2949
2950   if (text_view->cursor_gc)
2951     gdk_gc_unref (text_view->cursor_gc);
2952
2953   gtk_widget_style_get (GTK_WIDGET (text_view), "cursor_color", &cursor_color, NULL);
2954
2955   if (!cursor_color)
2956     cursor_color = &red;
2957
2958   text_view->cursor_gc = gdk_gc_new (text_view->text_window->bin_window);
2959   gdk_gc_set_rgb_fg_color (text_view->cursor_gc, cursor_color);
2960 }
2961
2962 static void
2963 gtk_text_view_realize (GtkWidget *widget)
2964 {
2965   GtkTextView *text_view;
2966   GdkWindowAttr attributes;
2967   gint attributes_mask;
2968
2969   text_view = GTK_TEXT_VIEW (widget);
2970   GTK_WIDGET_SET_FLAGS (text_view, GTK_REALIZED);
2971
2972   attributes.window_type = GDK_WINDOW_CHILD;
2973   attributes.x = widget->allocation.x;
2974   attributes.y = widget->allocation.y;
2975   attributes.width = widget->allocation.width;
2976   attributes.height = widget->allocation.height;
2977   attributes.wclass = GDK_INPUT_OUTPUT;
2978   attributes.visual = gtk_widget_get_visual (widget);
2979   attributes.colormap = gtk_widget_get_colormap (widget);
2980   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK | GDK_EXPOSURE_MASK;
2981
2982   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
2983
2984   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
2985                                    &attributes, attributes_mask);
2986   gdk_window_set_user_data (widget->window, widget);
2987
2988   /* must come before text_window_realize calls */
2989   widget->style = gtk_style_attach (widget->style, widget->window);
2990
2991   gdk_window_set_background (widget->window,
2992                              &widget->style->bg[GTK_WIDGET_STATE (widget)]);
2993
2994   text_window_realize (text_view->text_window, widget->window);
2995
2996   if (text_view->left_window)
2997     text_window_realize (text_view->left_window,
2998                          widget->window);
2999
3000   if (text_view->top_window)
3001     text_window_realize (text_view->top_window,
3002                          widget->window);
3003
3004   if (text_view->right_window)
3005     text_window_realize (text_view->right_window,
3006                          widget->window);
3007
3008   if (text_view->bottom_window)
3009     text_window_realize (text_view->bottom_window,
3010                          widget->window);
3011
3012   gtk_text_view_realize_cursor_gc (text_view);
3013
3014   gtk_text_view_ensure_layout (text_view);
3015
3016   if (text_view->buffer)
3017     gtk_text_buffer_add_selection_clipboard (text_view->buffer,
3018                                              gtk_clipboard_get (GDK_SELECTION_PRIMARY));
3019 }
3020
3021 static void
3022 gtk_text_view_unrealize (GtkWidget *widget)
3023 {
3024   GtkTextView *text_view;
3025
3026   text_view = GTK_TEXT_VIEW (widget);
3027
3028   if (text_view->buffer)
3029     gtk_text_buffer_remove_selection_clipboard (text_view->buffer,
3030                                                 gtk_clipboard_get (GDK_SELECTION_PRIMARY));
3031
3032   if (text_view->cursor_gc)
3033     {
3034       gdk_gc_unref (text_view->cursor_gc);
3035       text_view->cursor_gc = NULL;
3036     }
3037
3038   if (text_view->first_validate_idle)
3039     {
3040       g_source_remove (text_view->first_validate_idle);
3041       text_view->first_validate_idle = 0;
3042     }
3043
3044   if (text_view->incremental_validate_idle)
3045     {
3046       g_source_remove (text_view->incremental_validate_idle);
3047       text_view->incremental_validate_idle = 0;
3048     }
3049
3050   if (text_view->popup_menu)
3051     {
3052       gtk_widget_destroy (text_view->popup_menu);
3053       text_view->popup_menu = NULL;
3054     }
3055
3056   text_window_unrealize (text_view->text_window);
3057
3058   if (text_view->left_window)
3059     text_window_unrealize (text_view->left_window);
3060
3061   if (text_view->top_window)
3062     text_window_unrealize (text_view->top_window);
3063
3064   if (text_view->right_window)
3065     text_window_unrealize (text_view->right_window);
3066
3067   if (text_view->bottom_window)
3068     text_window_unrealize (text_view->bottom_window);
3069
3070   gtk_text_view_destroy_layout (text_view);
3071
3072   (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
3073 }
3074
3075 static void
3076 gtk_text_view_style_set (GtkWidget *widget,
3077                          GtkStyle  *previous_style)
3078 {
3079   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3080
3081   if (GTK_WIDGET_REALIZED (widget))
3082     {
3083       gdk_window_set_background (widget->window,
3084                                  &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3085
3086       gdk_window_set_background (text_view->text_window->bin_window,
3087                                  &widget->style->base[GTK_WIDGET_STATE (widget)]);
3088
3089       if (text_view->left_window)
3090         gdk_window_set_background (text_view->left_window->bin_window,
3091                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3092       if (text_view->right_window)
3093         gdk_window_set_background (text_view->right_window->bin_window,
3094                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3095
3096       if (text_view->top_window)
3097         gdk_window_set_background (text_view->top_window->bin_window,
3098                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3099
3100       if (text_view->bottom_window)
3101         gdk_window_set_background (text_view->bottom_window->bin_window,
3102                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
3103
3104       gtk_text_view_realize_cursor_gc (text_view);
3105     }
3106
3107   if (text_view->layout && previous_style)
3108     {
3109       gtk_text_view_set_attributes_from_style (text_view,
3110                                                text_view->layout->default_style,
3111                                                widget->style);
3112       gtk_text_layout_default_style_changed (text_view->layout);
3113     }
3114 }
3115
3116 static void
3117 gtk_text_view_direction_changed (GtkWidget        *widget,
3118                                  GtkTextDirection  previous_direction)
3119 {
3120   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3121
3122   if (text_view->layout)
3123     {
3124       text_view->layout->default_style->direction = gtk_widget_get_direction (widget);
3125       gtk_text_layout_default_style_changed (text_view->layout);
3126     }
3127 }
3128
3129 /*
3130  * Events
3131  */
3132
3133 static gboolean
3134 get_event_coordinates (GdkEvent *event, gint *x, gint *y)
3135 {
3136   if (event)
3137     switch (event->type)
3138       {
3139       case GDK_MOTION_NOTIFY:
3140         *x = event->motion.x;
3141         *y = event->motion.y;
3142         return TRUE;
3143         break;
3144
3145       case GDK_BUTTON_PRESS:
3146       case GDK_2BUTTON_PRESS:
3147       case GDK_3BUTTON_PRESS:
3148       case GDK_BUTTON_RELEASE:
3149         *x = event->button.x;
3150         *y = event->button.y;
3151         return TRUE;
3152         break;
3153
3154       case GDK_KEY_PRESS:
3155       case GDK_KEY_RELEASE:
3156       case GDK_ENTER_NOTIFY:
3157       case GDK_LEAVE_NOTIFY:
3158       case GDK_PROPERTY_NOTIFY:
3159       case GDK_SELECTION_CLEAR:
3160       case GDK_SELECTION_REQUEST:
3161       case GDK_SELECTION_NOTIFY:
3162       case GDK_PROXIMITY_IN:
3163       case GDK_PROXIMITY_OUT:
3164       case GDK_DRAG_ENTER:
3165       case GDK_DRAG_LEAVE:
3166       case GDK_DRAG_MOTION:
3167       case GDK_DRAG_STATUS:
3168       case GDK_DROP_START:
3169       case GDK_DROP_FINISHED:
3170       default:
3171         return FALSE;
3172         break;
3173       }
3174
3175   return FALSE;
3176 }
3177
3178 static gint
3179 emit_event_on_tags (GtkWidget   *widget,
3180                     GdkEvent    *event,
3181                     GtkTextIter *iter)
3182 {
3183   GSList *tags;
3184   GSList *tmp;
3185   gboolean retval = FALSE;
3186   GtkTextView *text_view;
3187
3188   text_view = GTK_TEXT_VIEW (widget);
3189
3190   tags = gtk_text_iter_get_tags (iter);
3191
3192   tmp = tags;
3193   while (tmp != NULL)
3194     {
3195       GtkTextTag *tag = tmp->data;
3196
3197       if (gtk_text_tag_event (tag, G_OBJECT (widget), event, iter))
3198         {
3199           retval = TRUE;
3200           break;
3201         }
3202
3203       tmp = g_slist_next (tmp);
3204     }
3205
3206   g_slist_free (tags);
3207
3208   return retval;
3209 }
3210
3211 static gint
3212 gtk_text_view_event (GtkWidget *widget, GdkEvent *event)
3213 {
3214   GtkTextView *text_view;
3215   gint x = 0, y = 0;
3216
3217   text_view = GTK_TEXT_VIEW (widget);
3218
3219   if (text_view->layout == NULL ||
3220       get_buffer (text_view) == NULL)
3221     return FALSE;
3222
3223   if (event->any.window != text_view->text_window->bin_window)
3224     return FALSE;
3225
3226   if (get_event_coordinates (event, &x, &y))
3227     {
3228       GtkTextIter iter;
3229
3230       x += text_view->xoffset;
3231       y += text_view->yoffset;
3232
3233       /* FIXME this is slow and we do it twice per event.
3234        * My favorite solution is to have GtkTextLayout cache
3235        * the last couple lookups.
3236        */
3237       gtk_text_layout_get_iter_at_pixel (text_view->layout,
3238                                          &iter,
3239                                          x, y);
3240
3241       return emit_event_on_tags (widget, event, &iter);
3242     }
3243   else if (event->type == GDK_KEY_PRESS ||
3244            event->type == GDK_KEY_RELEASE)
3245     {
3246       GtkTextMark *insert;
3247       GtkTextIter iter;
3248
3249       insert = gtk_text_buffer_get_mark (get_buffer (text_view),
3250                                          "insert");
3251
3252       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
3253
3254       return emit_event_on_tags (widget, event, &iter);
3255     }
3256   else
3257     return FALSE;
3258 }
3259
3260 static gint
3261 gtk_text_view_key_press_event (GtkWidget *widget, GdkEventKey *event)
3262 {
3263   gboolean retval = FALSE;
3264   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3265   GtkTextMark *insert;
3266   GtkTextIter iter;
3267
3268   if (text_view->layout == NULL ||
3269       get_buffer (text_view) == NULL)
3270     return FALSE;
3271
3272   insert = gtk_text_buffer_get_insert (get_buffer (text_view));
3273   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
3274   if (gtk_text_iter_can_insert (&iter, text_view->editable) &&
3275       gtk_im_context_filter_keypress (text_view->im_context, event))
3276     {
3277       text_view->need_im_reset = TRUE;
3278       retval = TRUE;
3279     }
3280   else if (GTK_WIDGET_CLASS (parent_class)->key_press_event &&
3281            GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, event))
3282     retval = TRUE;
3283   else if (event->keyval == GDK_Return ||
3284            event->keyval == GDK_KP_Enter)
3285     {
3286       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\n", 1,
3287                                                     text_view->editable);
3288       DV(g_print (G_STRLOC": scrolling to mark\n"));
3289       gtk_text_view_scroll_to_mark (text_view,
3290                                     gtk_text_buffer_get_mark (get_buffer (text_view),
3291                                                               "insert"),
3292                                     0.0, FALSE, 0.0, 0.0);
3293       retval = TRUE;
3294     }
3295   /* Pass through Tab as literal tab, unless Control is held down */
3296   else if ((event->keyval == GDK_Tab ||
3297             event->keyval == GDK_KP_Tab ||
3298             event->keyval == GDK_ISO_Left_Tab) &&
3299            !(event->state & GDK_CONTROL_MASK))
3300     {
3301       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\t", 1,
3302                                                     text_view->editable);
3303       DV(g_print (G_STRLOC": scrolling onscreen\n"));
3304       gtk_text_view_scroll_mark_onscreen (text_view,
3305                                           gtk_text_buffer_get_mark (get_buffer (text_view),
3306                                                                     "insert"));
3307       retval = TRUE;
3308     }
3309   else
3310     retval = FALSE;
3311
3312   gtk_text_view_pend_cursor_blink (text_view);
3313
3314   return retval;
3315 }
3316
3317 static gint
3318 gtk_text_view_key_release_event (GtkWidget *widget, GdkEventKey *event)
3319 {
3320   return FALSE;
3321 }
3322
3323 static gint
3324 gtk_text_view_button_press_event (GtkWidget *widget, GdkEventButton *event)
3325 {
3326   GtkTextView *text_view;
3327
3328   text_view = GTK_TEXT_VIEW (widget);
3329
3330   text_view->disable_scroll_on_focus = TRUE;
3331   gtk_widget_grab_focus (widget);
3332   text_view->disable_scroll_on_focus = FALSE;
3333
3334   if (event->window != text_view->text_window->bin_window)
3335     {
3336       /* Remove selection if any. */
3337       gtk_text_view_unselect (text_view);
3338       return FALSE;
3339     }
3340
3341 #if 0
3342   /* debug hack */
3343   if (event->button == 3 && (event->state & GDK_CONTROL_MASK) != 0)
3344     _gtk_text_buffer_spew (GTK_TEXT_VIEW (widget)->buffer);
3345   else if (event->button == 3)
3346     gtk_text_layout_spew (GTK_TEXT_VIEW (widget)->layout);
3347 #endif
3348
3349   if (event->type == GDK_BUTTON_PRESS)
3350     {
3351       gtk_text_view_reset_im_context (text_view);
3352
3353       if (event->button == 1)
3354         {
3355           /* If we're in the selection, start a drag copy/move of the
3356            * selection; otherwise, start creating a new selection.
3357            */
3358           GtkTextIter iter;
3359           GtkTextIter start, end;
3360
3361           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3362                                              &iter,
3363                                              event->x + text_view->xoffset,
3364                                              event->y + text_view->yoffset);
3365
3366           if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
3367                                                     &start, &end) &&
3368               gtk_text_iter_in_range (&iter, &start, &end))
3369             {
3370               text_view->drag_start_x = event->x;
3371               text_view->drag_start_y = event->y;
3372               text_view->pending_place_cursor_button = event->button;
3373             }
3374           else
3375             {
3376               gtk_text_view_start_selection_drag (text_view, &iter, event);
3377             }
3378
3379           return TRUE;
3380         }
3381       else if (event->button == 2)
3382         {
3383           GtkTextIter iter;
3384
3385           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3386                                              &iter,
3387                                              event->x + text_view->xoffset,
3388                                              event->y + text_view->yoffset);
3389
3390           gtk_text_buffer_paste_clipboard (get_buffer (text_view),
3391                                            gtk_clipboard_get (GDK_SELECTION_PRIMARY),
3392                                            &iter,
3393                                            text_view->editable);
3394           return TRUE;
3395         }
3396       else if (event->button == 3)
3397         {
3398           gtk_text_view_do_popup (text_view, event);
3399         }
3400     }
3401   else if ((event->type == GDK_2BUTTON_PRESS ||
3402             event->type == GDK_3BUTTON_PRESS) &&
3403            event->button == 1)
3404     {
3405       GtkTextIter start, end;
3406
3407       /* End the selection drag, otherwise we'd clear the new
3408        * word/line selection on button release
3409        */
3410       gtk_text_view_end_selection_drag (text_view, event);
3411
3412       gtk_text_layout_get_iter_at_pixel (text_view->layout,
3413                                          &start,
3414                                          event->x + text_view->xoffset,
3415                                          event->y + text_view->yoffset);
3416
3417       end = start;
3418
3419       if (event->type == GDK_2BUTTON_PRESS)
3420         {
3421           if (gtk_text_iter_inside_word (&start))
3422             {
3423               if (!gtk_text_iter_starts_word (&start))
3424                 gtk_text_iter_backward_word_start (&start);
3425
3426               if (!gtk_text_iter_ends_word (&end))
3427                 gtk_text_iter_forward_word_end (&end);
3428             }
3429         }
3430       else if (event->type == GDK_3BUTTON_PRESS)
3431         {
3432           if (gtk_text_view_starts_display_line (text_view, &start))
3433             {
3434               /* If on a display line boundary, we assume the user
3435                * clicked off the end of a line and we therefore select
3436                * the line before the boundary.
3437                */
3438               gtk_text_view_backward_display_line_start (text_view, &start);
3439             }
3440           else
3441             {
3442               /* start isn't on the start of a line, so we move it to the
3443                * start, and move end to the end unless it's already there.
3444                */
3445               gtk_text_view_backward_display_line_start (text_view, &start);
3446
3447               if (!gtk_text_view_starts_display_line (text_view, &end))
3448                 gtk_text_view_forward_display_line_end (text_view, &end);
3449             }
3450         }
3451
3452       gtk_text_buffer_move_mark (get_buffer (text_view),
3453                                  gtk_text_buffer_get_selection_bound (get_buffer (text_view)),
3454                                  &start);
3455       gtk_text_buffer_move_mark (get_buffer (text_view),
3456                                  gtk_text_buffer_get_insert (get_buffer (text_view)),
3457                                  &end);
3458
3459       text_view->just_selected_element = TRUE;
3460
3461       return TRUE;
3462     }
3463
3464   return FALSE;
3465 }
3466
3467 static gint
3468 gtk_text_view_button_release_event (GtkWidget *widget, GdkEventButton *event)
3469 {
3470   GtkTextView *text_view;
3471
3472   text_view = GTK_TEXT_VIEW (widget);
3473
3474   if (event->window != text_view->text_window->bin_window)
3475     return FALSE;
3476
3477   if (event->button == 1)
3478     {
3479       if (text_view->drag_start_x >= 0)
3480         {
3481           text_view->drag_start_x = -1;
3482           text_view->drag_start_y = -1;
3483         }
3484
3485       if (gtk_text_view_end_selection_drag (GTK_TEXT_VIEW (widget), event))
3486         return TRUE;
3487       else if (text_view->just_selected_element)
3488         {
3489           text_view->just_selected_element = FALSE;
3490           return FALSE;
3491         }
3492       else if (text_view->pending_place_cursor_button == event->button)
3493         {
3494           GtkTextIter iter;
3495
3496           /* Unselect everything; we clicked inside selection, but
3497            * didn't move by the drag threshold, so just clear selection
3498            * and place cursor.
3499            */
3500           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3501                                              &iter,
3502                                              event->x + text_view->xoffset,
3503                                              event->y + text_view->yoffset);
3504
3505           gtk_text_buffer_place_cursor (get_buffer (text_view), &iter);
3506
3507           text_view->pending_place_cursor_button = 0;
3508
3509           return FALSE;
3510         }
3511     }
3512
3513   return FALSE;
3514 }
3515
3516 static void
3517 keymap_direction_changed (GdkKeymap   *keymap,
3518                           GtkTextView *text_view)
3519 {
3520   gtk_text_view_check_keymap_direction (text_view);
3521 }
3522
3523 static gint
3524 gtk_text_view_focus_in_event (GtkWidget *widget, GdkEventFocus *event)
3525 {
3526   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3527
3528   GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3529   gtk_widget_queue_draw (widget);
3530
3531   DV(g_print (G_STRLOC": focus_in_event\n"));
3532
3533   if (text_view->cursor_visible && text_view->layout)
3534     {
3535       gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3536       gtk_text_view_check_cursor_blink (text_view);
3537     }
3538
3539   g_signal_connect (gdk_keymap_get_default (),
3540                     "direction_changed",
3541                     G_CALLBACK (keymap_direction_changed), text_view);
3542   gtk_text_view_check_keymap_direction (text_view);
3543
3544   text_view->need_im_reset = TRUE;
3545   gtk_im_context_focus_in (GTK_TEXT_VIEW (widget)->im_context);
3546
3547   return FALSE;
3548 }
3549
3550 static gint
3551 gtk_text_view_focus_out_event (GtkWidget *widget, GdkEventFocus *event)
3552 {
3553   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3554
3555   GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3556   gtk_widget_queue_draw (widget);
3557
3558   DV(g_print (G_STRLOC": focus_out_event\n"));
3559
3560   if (text_view->cursor_visible && text_view->layout)
3561     {
3562       gtk_text_layout_set_cursor_visible (text_view->layout, FALSE);
3563       gtk_text_view_check_cursor_blink (text_view);
3564     }
3565
3566   g_signal_handlers_disconnect_by_func (gdk_keymap_get_default (),
3567                                         keymap_direction_changed,
3568                                         text_view);
3569
3570   text_view->need_im_reset = TRUE;
3571   gtk_im_context_focus_out (GTK_TEXT_VIEW (widget)->im_context);
3572
3573   return FALSE;
3574 }
3575
3576 static gint
3577 gtk_text_view_motion_event (GtkWidget *widget, GdkEventMotion *event)
3578 {
3579   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3580
3581   if (event->window == text_view->text_window->bin_window &&
3582       text_view->drag_start_x >= 0)
3583     {
3584       gint x, y;
3585
3586       gdk_window_get_pointer (text_view->text_window->bin_window,
3587                               &x, &y, NULL);
3588
3589       if (gtk_drag_check_threshold (widget,
3590                                     text_view->drag_start_x,
3591                                     text_view->drag_start_y,
3592                                     x, y))
3593         {
3594           GtkTextIter iter;
3595           gint buffer_x, buffer_y;
3596
3597           gtk_text_view_window_to_buffer_coords (text_view,
3598                                                  GTK_TEXT_WINDOW_TEXT,
3599                                                  text_view->drag_start_x,
3600                                                  text_view->drag_start_y,
3601                                                  &buffer_x,
3602                                                  &buffer_y);
3603
3604           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3605                                              &iter,
3606                                              buffer_x, buffer_y);
3607
3608           gtk_text_view_start_selection_dnd (text_view, &iter, event);
3609           return TRUE;
3610         }
3611     }
3612
3613   return FALSE;
3614 }
3615
3616 static void
3617 gtk_text_view_paint (GtkWidget *widget, GdkRectangle *area)
3618 {
3619   GtkTextView *text_view;
3620
3621   text_view = GTK_TEXT_VIEW (widget);
3622
3623   g_return_if_fail (text_view->layout != NULL);
3624   g_return_if_fail (text_view->xoffset >= 0);
3625   g_return_if_fail (text_view->yoffset >= 0);
3626
3627   DV (g_print (G_STRLOC": first_validate_idle: %d\n",
3628                text_view->first_validate_idle));
3629
3630   if (!text_view->onscreen_validated)
3631     {
3632       G_BREAKPOINT ();
3633       g_warning (G_STRLOC ": somehow some text lines were modified or scrolling occurred since the last validation of lines on the screen");
3634     }
3635
3636 #if 0
3637   printf ("painting %d,%d  %d x %d\n",
3638           area->x, area->y,
3639           area->width, area->height);
3640 #endif
3641
3642   gtk_text_layout_draw (text_view->layout,
3643                         widget,
3644                         text_view->text_window->bin_window,
3645                         text_view->cursor_gc,
3646                         text_view->xoffset,
3647                         text_view->yoffset,
3648                         area->x, area->y,
3649                         area->width, area->height);
3650 }
3651
3652 static gint
3653 gtk_text_view_expose_event (GtkWidget *widget, GdkEventExpose *event)
3654 {
3655 #if 0
3656   {
3657     GdkWindow *win = event->window;
3658     GdkColor color = { 0, 0, 0, 65535 };
3659     GdkGC *gc = gdk_gc_new (win);
3660     gdk_gc_set_rgb_fg_color (gc, &color);
3661     gdk_draw_rectangle (win,
3662                         gc, TRUE,
3663                         event->area.x, event->area.y,
3664                         event->area.width, event->area.height);
3665     gdk_gc_unref (gc);
3666   }
3667 #endif
3668
3669   if (event->window == gtk_text_view_get_window (GTK_TEXT_VIEW (widget),
3670                                                  GTK_TEXT_WINDOW_TEXT))
3671     {
3672       DV(g_print (">Exposed ("G_STRLOC")\n"));
3673       gtk_text_view_paint (widget, &event->area);
3674     }
3675
3676   if (event->window == widget->window)
3677     gtk_text_view_draw_focus (widget);
3678
3679   return TRUE;
3680 }
3681
3682 static void
3683 gtk_text_view_draw_focus (GtkWidget *widget)
3684 {
3685   gboolean interior_focus;
3686
3687   /* We clear the focus if we are in interior focus mode. */
3688   gtk_widget_style_get (widget, "interior_focus", &interior_focus, NULL);
3689
3690   if (GTK_WIDGET_DRAWABLE (widget))
3691     {
3692       if (GTK_WIDGET_HAS_FOCUS (widget) && !interior_focus)
3693         {
3694           gtk_paint_focus (widget->style, widget->window,
3695                            NULL, widget, "textview",
3696                            0, 0,
3697                            widget->allocation.width - 1,
3698                            widget->allocation.height - 1);
3699         }
3700       else
3701         {
3702           gdk_window_clear (widget->window);
3703         }
3704     }
3705 }
3706
3707 static void
3708 gtk_text_view_grab_focus (GtkWidget *widget)
3709 {
3710   GtkTextView *text_view;
3711
3712   text_view = GTK_TEXT_VIEW (widget);
3713
3714   GTK_WIDGET_CLASS (parent_class)->grab_focus (widget);
3715
3716   if (!text_view->disable_scroll_on_focus)
3717     gtk_text_view_scroll_mark_onscreen (text_view,
3718                                         gtk_text_buffer_get_mark (get_buffer (text_view),
3719                                                                   "insert"));
3720 }
3721
3722 /*
3723  * Container
3724  */
3725
3726 static void
3727 gtk_text_view_add (GtkContainer *container,
3728                    GtkWidget    *child)
3729 {
3730   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
3731   g_return_if_fail (GTK_IS_WIDGET (child));
3732
3733   /* This is pretty random. */
3734   gtk_text_view_add_child_in_window (GTK_TEXT_VIEW (container),
3735                                      child,
3736                                      GTK_TEXT_WINDOW_WIDGET,
3737                                      0, 0);
3738 }
3739
3740 static void
3741 gtk_text_view_remove (GtkContainer *container,
3742                       GtkWidget    *child)
3743 {
3744   GSList *iter;
3745   GtkTextView *text_view;
3746   GtkTextViewChild *vc;
3747
3748   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
3749   g_return_if_fail (GTK_IS_WIDGET (child));
3750   g_return_if_fail (child->parent == (GtkWidget*) container);
3751
3752   text_view = GTK_TEXT_VIEW (container);
3753
3754   vc = NULL;
3755   iter = text_view->children;
3756
3757   while (iter != NULL)
3758     {
3759       vc = iter->data;
3760
3761       if (vc->widget == child)
3762         break;
3763
3764       iter = g_slist_next (iter);
3765     }
3766
3767   g_assert (iter != NULL); /* be sure we had the child in the list */
3768
3769   text_view->children = g_slist_remove (text_view->children, vc);
3770
3771   gtk_widget_unparent (vc->widget);
3772
3773   text_view_child_free (vc);
3774 }
3775
3776 static void
3777 gtk_text_view_forall (GtkContainer *container,
3778                       gboolean      include_internals,
3779                       GtkCallback   callback,
3780                       gpointer      callback_data)
3781 {
3782   GSList *iter;
3783   GtkTextView *text_view;
3784
3785   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
3786   g_return_if_fail (callback != NULL);
3787
3788   text_view = GTK_TEXT_VIEW (container);
3789
3790   iter = text_view->children;
3791
3792   while (iter != NULL)
3793     {
3794       GtkTextViewChild *vc = iter->data;
3795
3796       (* callback) (vc->widget, callback_data);
3797
3798       iter = g_slist_next (iter);
3799     }
3800 }
3801
3802 #define CURSOR_ON_MULTIPLIER 0.66
3803 #define CURSOR_OFF_MULTIPLIER 0.34
3804 #define CURSOR_PEND_MULTIPLIER 1.0
3805
3806 static gboolean
3807 cursor_blinks (GtkTextView *text_view)
3808 {
3809   GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
3810   gboolean blink;
3811
3812 #ifdef DEBUG_VALIDATION_AND_SCROLLING
3813   return FALSE;
3814 #endif
3815   if (gtk_debug_flags & GTK_DEBUG_UPDATES)
3816     return FALSE;
3817
3818   g_object_get (G_OBJECT (settings), "gtk-cursor-blink", &blink, NULL);
3819   return blink;
3820 }
3821
3822 static gint
3823 get_cursor_time (GtkTextView *text_view)
3824 {
3825   GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
3826   gint time;
3827
3828   g_object_get (G_OBJECT (settings), "gtk-cursor-blink-time", &time, NULL);
3829
3830   return time;
3831 }
3832
3833 /*
3834  * Blink!
3835  */
3836
3837 static gint
3838 blink_cb (gpointer data)
3839 {
3840   GtkTextView *text_view;
3841   gboolean visible;
3842
3843   GDK_THREADS_ENTER ();
3844
3845   text_view = GTK_TEXT_VIEW (data);
3846
3847   g_assert (text_view->layout);
3848   g_assert (GTK_WIDGET_HAS_FOCUS (text_view));
3849   g_assert (text_view->cursor_visible);
3850
3851   visible = gtk_text_layout_get_cursor_visible (text_view->layout);
3852
3853   if (visible)
3854     text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_OFF_MULTIPLIER,
3855                                                 blink_cb,
3856                                                 text_view);
3857   else
3858     text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_ON_MULTIPLIER,
3859                                                 blink_cb,
3860                                                 text_view);
3861
3862   gtk_text_layout_set_cursor_visible (text_view->layout,
3863                                       !visible);
3864
3865   GDK_THREADS_LEAVE ();
3866
3867   /* Remove ourselves */
3868   return FALSE;
3869 }
3870
3871
3872 static void
3873 gtk_text_view_stop_cursor_blink (GtkTextView *text_view)
3874 {
3875   if (text_view->blink_timeout)
3876     {
3877       gtk_timeout_remove (text_view->blink_timeout);
3878       text_view->blink_timeout = 0;
3879     }
3880 }
3881
3882 static void
3883 gtk_text_view_check_cursor_blink (GtkTextView *text_view)
3884 {
3885   if (text_view->layout != NULL &&
3886       text_view->cursor_visible &&
3887       GTK_WIDGET_HAS_FOCUS (text_view))
3888     {
3889       if (cursor_blinks (text_view))
3890         {
3891           if (text_view->blink_timeout == 0)
3892             {
3893               gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3894
3895               text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_OFF_MULTIPLIER,
3896                                                           blink_cb,
3897                                                           text_view);
3898             }
3899         }
3900       else
3901         gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3902     }
3903   else
3904     {
3905       gtk_text_view_stop_cursor_blink (text_view);
3906     }
3907 }
3908
3909 static void
3910 gtk_text_view_pend_cursor_blink(GtkTextView *text_view)
3911 {
3912   if (text_view->layout != NULL &&
3913       text_view->cursor_visible &&
3914       GTK_WIDGET_HAS_FOCUS (text_view) &&
3915       cursor_blinks (text_view))
3916     {
3917       if (text_view->blink_timeout != 0)
3918         {
3919           gtk_timeout_remove (text_view->blink_timeout);
3920           text_view->blink_timeout = 0;
3921         }
3922
3923       gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3924
3925       text_view->blink_timeout = gtk_timeout_add (get_cursor_time (text_view) * CURSOR_PEND_MULTIPLIER,
3926                                                   blink_cb,
3927                                                   text_view);
3928     }
3929 }
3930
3931
3932 /*
3933  * Key binding handlers
3934  */
3935
3936 static void
3937 gtk_text_view_move_iter_by_lines (GtkTextView *text_view,
3938                                   GtkTextIter *newplace,
3939                                   gint         count)
3940 {
3941   while (count < 0)
3942     {
3943       gtk_text_layout_move_iter_to_previous_line (text_view->layout, newplace);
3944       count++;
3945     }
3946
3947   while (count > 0)
3948     {
3949       gtk_text_layout_move_iter_to_next_line (text_view->layout, newplace);
3950       count--;
3951     }
3952 }
3953
3954 static void
3955 gtk_text_view_move_cursor (GtkTextView     *text_view,
3956                            GtkMovementStep  step,
3957                            gint             count,
3958                            gboolean         extend_selection)
3959 {
3960   GtkTextIter insert;
3961   GtkTextIter newplace;
3962
3963   gint cursor_x_pos = 0;
3964
3965   gtk_text_view_reset_im_context (text_view);
3966
3967   if (step == GTK_MOVEMENT_PAGES)
3968     {
3969       gtk_text_view_scroll_pages (text_view, count);
3970       gtk_text_view_pend_cursor_blink (text_view);
3971       return;
3972     }
3973
3974   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
3975                                     gtk_text_buffer_get_mark (get_buffer (text_view),
3976                                                               "insert"));
3977   newplace = insert;
3978
3979   if (step == GTK_MOVEMENT_DISPLAY_LINES)
3980     gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, NULL);
3981
3982   switch (step)
3983     {
3984     case GTK_MOVEMENT_LOGICAL_POSITIONS:
3985       gtk_text_iter_forward_cursor_positions (&newplace, count);
3986       break;
3987
3988     case GTK_MOVEMENT_VISUAL_POSITIONS:
3989       gtk_text_layout_move_iter_visually (text_view->layout,
3990                                           &newplace, count);
3991       break;
3992
3993     case GTK_MOVEMENT_WORDS:
3994       if (count < 0)
3995         gtk_text_iter_backward_word_starts (&newplace, -count);
3996       else if (count > 0)
3997         gtk_text_iter_forward_word_ends (&newplace, count);
3998       break;
3999
4000     case GTK_MOVEMENT_DISPLAY_LINES:
4001       gtk_text_view_move_iter_by_lines (text_view, &newplace, count);
4002       gtk_text_layout_move_iter_to_x (text_view->layout, &newplace, cursor_x_pos);
4003       break;
4004
4005     case GTK_MOVEMENT_DISPLAY_LINE_ENDS:
4006       if (count > 1)
4007         gtk_text_view_move_iter_by_lines (text_view, &newplace, --count);
4008       else if (count < -1)
4009         gtk_text_view_move_iter_by_lines (text_view, &newplace, ++count);
4010
4011       if (count != 0)
4012         gtk_text_layout_move_iter_to_line_end (text_view->layout, &newplace, count);
4013       break;
4014
4015     case GTK_MOVEMENT_PARAGRAPHS:
4016       gtk_text_iter_forward_lines (&newplace, count);
4017       gtk_text_iter_set_line_offset (&newplace, 0);
4018       break;
4019
4020     case GTK_MOVEMENT_PARAGRAPH_ENDS:
4021       if (count > 0)
4022         gtk_text_iter_forward_to_line_end (&newplace);
4023       else if (count < 0)
4024         gtk_text_iter_set_line_offset (&newplace, 0);
4025       break;
4026
4027     case GTK_MOVEMENT_BUFFER_ENDS:
4028       if (count > 0)
4029         gtk_text_buffer_get_end_iter (get_buffer (text_view), &newplace);
4030       else if (count < 0)
4031         gtk_text_buffer_get_iter_at_offset (get_buffer (text_view), &newplace, 0);
4032       break;
4033
4034     default:
4035       break;
4036     }
4037
4038   if (!gtk_text_iter_equal (&insert, &newplace))
4039     {
4040       if (extend_selection)
4041         gtk_text_buffer_move_mark (get_buffer (text_view),
4042                                    gtk_text_buffer_get_mark (get_buffer (text_view),
4043                                                              "insert"),
4044                                    &newplace);
4045       else
4046         gtk_text_buffer_place_cursor (get_buffer (text_view), &newplace);
4047
4048       DV(g_print (G_STRLOC": scrolling onscreen\n"));
4049       gtk_text_view_scroll_mark_onscreen (text_view,
4050                                           gtk_text_buffer_get_mark (get_buffer (text_view),
4051                                                                     "insert"));
4052
4053       if (step == GTK_MOVEMENT_DISPLAY_LINES)
4054         {
4055           gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, -1);
4056         }
4057     }
4058
4059   gtk_text_view_pend_cursor_blink (text_view);
4060 }
4061
4062 static void
4063 gtk_text_view_set_anchor (GtkTextView *text_view)
4064 {
4065   GtkTextIter insert;
4066
4067   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
4068                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4069                                                               "insert"));
4070
4071   gtk_text_buffer_create_mark (get_buffer (text_view), "anchor", &insert, TRUE);
4072 }
4073
4074 static void
4075 gtk_text_view_scroll_pages (GtkTextView *text_view,
4076                             gint         count)
4077 {
4078   gdouble newval;
4079   GtkAdjustment *adj;
4080   gint cursor_x_pos, cursor_y_pos;
4081   GtkTextIter new_insert;
4082   GtkTextIter anchor;
4083   gint y0, y1;
4084
4085   g_return_if_fail (text_view->vadjustment != NULL);
4086
4087   adj = text_view->vadjustment;
4088
4089   /* Validate the region that will be brought into view by the cursor motion
4090    */
4091   if (count < 0)
4092     {
4093       gtk_text_view_get_first_para_iter (text_view, &anchor);
4094       y0 = adj->page_size;
4095       y1 = adj->page_size + count * adj->page_increment;
4096     }
4097   else
4098     {
4099       gtk_text_view_get_first_para_iter (text_view, &anchor);
4100       y0 = count * adj->page_increment + adj->page_size;
4101       y1 = 0;
4102     }
4103
4104   gtk_text_layout_validate_yrange (text_view->layout, &anchor, y0, y1);
4105   /* FIXME do we need to update the adjustment ranges here? */
4106
4107   gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, &cursor_y_pos);
4108
4109   newval = adj->value;
4110
4111   newval += count * adj->page_increment;
4112
4113   cursor_y_pos += newval - adj->value;
4114   set_adjustment_clamped (adj, newval);
4115
4116   gtk_text_layout_get_iter_at_pixel (text_view->layout, &new_insert, cursor_x_pos, cursor_y_pos);
4117   clamp_iter_onscreen (text_view, &new_insert);
4118   gtk_text_buffer_place_cursor (get_buffer (text_view), &new_insert);
4119
4120   gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, cursor_y_pos);
4121
4122   /* Adjust to have the cursor _entirely_ onscreen, move_mark_onscreen
4123    * only guarantees 1 pixel onscreen.
4124    */
4125   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4126   gtk_text_view_scroll_mark_onscreen (text_view,
4127                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4128                                                                 "insert"));
4129 }
4130
4131 static gboolean
4132 whitespace (gunichar ch, gpointer user_data)
4133 {
4134   return (ch == ' ' || ch == '\t');
4135 }
4136
4137 static gboolean
4138 not_whitespace (gunichar ch, gpointer user_data)
4139 {
4140   return !whitespace (ch, user_data);
4141 }
4142
4143 static gboolean
4144 find_whitepace_region (const GtkTextIter *center,
4145                        GtkTextIter *start, GtkTextIter *end)
4146 {
4147   *start = *center;
4148   *end = *center;
4149
4150   if (gtk_text_iter_backward_find_char (start, not_whitespace, NULL, NULL))
4151     gtk_text_iter_forward_char (start); /* we want the first whitespace... */
4152   if (whitespace (gtk_text_iter_get_char (end), NULL))
4153     gtk_text_iter_forward_find_char (end, not_whitespace, NULL, NULL);
4154
4155   return !gtk_text_iter_equal (start, end);
4156 }
4157
4158 static void
4159 gtk_text_view_insert_at_cursor (GtkTextView *text_view,
4160                                 const gchar *str)
4161 {
4162   gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
4163                                                 text_view->editable);
4164 }
4165
4166 static void
4167 gtk_text_view_delete_from_cursor (GtkTextView   *text_view,
4168                                   GtkDeleteType  type,
4169                                   gint           count)
4170 {
4171   GtkTextIter insert;
4172   GtkTextIter start;
4173   GtkTextIter end;
4174   gboolean leave_one = FALSE;
4175
4176   gtk_text_view_reset_im_context (text_view);
4177
4178   if (type == GTK_DELETE_CHARS)
4179     {
4180       /* Char delete deletes the selection, if one exists */
4181       if (gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
4182                                             text_view->editable))
4183         return;
4184     }
4185
4186   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4187                                     &insert,
4188                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4189                                                               "insert"));
4190
4191   start = insert;
4192   end = insert;
4193
4194   switch (type)
4195     {
4196     case GTK_DELETE_CHARS:
4197       gtk_text_iter_forward_cursor_positions (&end, count);
4198       break;
4199
4200     case GTK_DELETE_WORD_ENDS:
4201       if (count > 0)
4202         gtk_text_iter_forward_word_ends (&end, count);
4203       else if (count < 0)
4204         gtk_text_iter_backward_word_starts (&start, 0 - count);
4205       break;
4206
4207     case GTK_DELETE_WORDS:
4208       break;
4209
4210     case GTK_DELETE_DISPLAY_LINE_ENDS:
4211       break;
4212
4213     case GTK_DELETE_DISPLAY_LINES:
4214       break;
4215
4216     case GTK_DELETE_PARAGRAPH_ENDS:
4217       /* If we're already at a newline, we need to
4218        * simply delete that newline, instead of
4219        * moving to the next one.
4220        */
4221       if (gtk_text_iter_ends_line (&end))
4222         {
4223           gtk_text_iter_forward_line (&end);
4224           --count;
4225         }
4226
4227       while (count > 0)
4228         {
4229           if (!gtk_text_iter_forward_to_line_end (&end))
4230             break;
4231
4232           --count;
4233         }
4234
4235       /* FIXME figure out what a negative count means
4236          and support that */
4237       break;
4238
4239     case GTK_DELETE_PARAGRAPHS:
4240       if (count > 0)
4241         {
4242           gtk_text_iter_set_line_offset (&start, 0);
4243           gtk_text_iter_forward_to_line_end (&end);
4244
4245           /* Do the lines beyond the first. */
4246           while (count > 1)
4247             {
4248               gtk_text_iter_forward_to_line_end (&end);
4249
4250               --count;
4251             }
4252         }
4253
4254       /* FIXME negative count? */
4255
4256       break;
4257
4258     case GTK_DELETE_WHITESPACE:
4259       {
4260         find_whitepace_region (&insert, &start, &end);
4261       }
4262       break;
4263
4264     default:
4265       break;
4266     }
4267
4268   if (!gtk_text_iter_equal (&start, &end))
4269     {
4270       gtk_text_buffer_begin_user_action (get_buffer (text_view));
4271
4272       if (gtk_text_buffer_delete_interactive (get_buffer (text_view), &start, &end,
4273                                               text_view->editable))
4274         {
4275           if (leave_one)
4276             gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view),
4277                                                           " ", 1,
4278                                                           text_view->editable);
4279         }
4280
4281       gtk_text_buffer_end_user_action (get_buffer (text_view));
4282
4283       DV(g_print (G_STRLOC": scrolling onscreen\n"));
4284       gtk_text_view_scroll_mark_onscreen (text_view,
4285                                           gtk_text_buffer_get_mark (get_buffer (text_view), "insert"));
4286     }
4287 }
4288
4289 static void
4290 gtk_text_view_cut_clipboard (GtkTextView *text_view)
4291 {
4292   gtk_text_buffer_cut_clipboard (get_buffer (text_view),
4293                                  gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
4294                                  text_view->editable);
4295   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4296   gtk_text_view_scroll_mark_onscreen (text_view,
4297                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4298                                                                 "insert"));
4299 }
4300
4301 static void
4302 gtk_text_view_copy_clipboard (GtkTextView *text_view)
4303 {
4304   gtk_text_buffer_copy_clipboard (get_buffer (text_view),
4305                                   gtk_clipboard_get (GDK_SELECTION_CLIPBOARD));
4306   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4307   gtk_text_view_scroll_mark_onscreen (text_view,
4308                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4309                                                                 "insert"));
4310 }
4311
4312 static void
4313 gtk_text_view_paste_clipboard (GtkTextView *text_view)
4314 {
4315   gtk_text_buffer_paste_clipboard (get_buffer (text_view),
4316                                    gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
4317                                    NULL,
4318                                    text_view->editable);
4319   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4320   gtk_text_view_scroll_mark_onscreen (text_view,
4321                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4322                                                                 "insert"));
4323 }
4324
4325 static void
4326 gtk_text_view_toggle_overwrite (GtkTextView *text_view)
4327 {
4328   text_view->overwrite_mode = !text_view->overwrite_mode;
4329 }
4330
4331 /*
4332  * Selections
4333  */
4334
4335 static void
4336 gtk_text_view_unselect (GtkTextView *text_view)
4337 {
4338   GtkTextIter insert;
4339
4340   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4341                                     &insert,
4342                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4343                                                               "insert"));
4344
4345   gtk_text_buffer_move_mark (get_buffer (text_view),
4346                              gtk_text_buffer_get_mark (get_buffer (text_view),
4347                                                        "selection_bound"),
4348                              &insert);
4349 }
4350
4351 static void
4352 move_mark_to_pointer_and_scroll (GtkTextView *text_view,
4353                                  const gchar *mark_name)
4354 {
4355   gint x, y;
4356   GdkModifierType state;
4357   GtkTextIter newplace;
4358
4359   /*   DV(g_print (G_STRLOC": begin\n")); */
4360
4361   gdk_window_get_pointer (text_view->text_window->bin_window,
4362                           &x, &y, &state);
4363
4364   /*   DV(g_print (G_STRLOC": get iter at pixel\n"); */
4365   gtk_text_layout_get_iter_at_pixel (text_view->layout,
4366                                      &newplace,
4367                                      x + text_view->xoffset,
4368                                      y + text_view->yoffset);
4369
4370   {
4371     GtkTextMark *mark =
4372       gtk_text_buffer_get_mark (get_buffer (text_view), mark_name);
4373
4374     DV(g_print (G_STRLOC": move mark\n"));
4375     gtk_text_buffer_move_mark (get_buffer (text_view),
4376                                mark,
4377                                &newplace);
4378
4379     DV(g_print (G_STRLOC": scrolling onscreen\n"));
4380     gtk_text_view_scroll_mark_onscreen (text_view, mark);
4381   }
4382 }
4383
4384 static gint
4385 selection_scan_timeout (gpointer data)
4386 {
4387   GtkTextView *text_view;
4388
4389   GDK_THREADS_ENTER ();
4390
4391   text_view = GTK_TEXT_VIEW (data);
4392
4393   DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
4394   move_mark_to_pointer_and_scroll (text_view, "insert");
4395
4396   GDK_THREADS_LEAVE ();
4397
4398   return TRUE; /* remain installed. */
4399 }
4400
4401 #define DND_SCROLL_MARGIN 0.20
4402
4403 static gint
4404 drag_scan_timeout (gpointer data)
4405 {
4406   GtkTextView *text_view;
4407   gint x, y;
4408   GdkModifierType state;
4409   GtkTextIter newplace;
4410
4411   GDK_THREADS_ENTER ();
4412
4413   text_view = GTK_TEXT_VIEW (data);
4414
4415   gdk_window_get_pointer (text_view->text_window->bin_window,
4416                           &x, &y, &state);
4417
4418   gtk_text_layout_get_iter_at_pixel (text_view->layout,
4419                                      &newplace,
4420                                      x + text_view->xoffset,
4421                                      y + text_view->yoffset);
4422
4423   gtk_text_buffer_move_mark (get_buffer (text_view),
4424                              text_view->dnd_mark,
4425                              &newplace);
4426
4427   DV(g_print (G_STRLOC": scrolling onscreen\n"));
4428   gtk_text_view_scroll_to_mark (text_view,
4429                                 text_view->dnd_mark,
4430                                 DND_SCROLL_MARGIN, FALSE, 0.0, 0.0);
4431
4432   GDK_THREADS_LEAVE ();
4433
4434   return TRUE;
4435 }
4436
4437 static gint
4438 selection_motion_event_handler (GtkTextView *text_view, GdkEventMotion *event, gpointer data)
4439 {
4440   DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
4441   move_mark_to_pointer_and_scroll (text_view, "insert");
4442
4443   /* If we had to scroll offscreen, insert a timeout to do so
4444    * again. Note that in the timeout, even if the mouse doesn't
4445    * move, due to this scroll xoffset/yoffset will have changed
4446    * and we'll need to scroll again.
4447    */
4448   if (text_view->scroll_timeout != 0) /* reset on every motion event */
4449     gtk_timeout_remove (text_view->scroll_timeout);
4450
4451   text_view->scroll_timeout =
4452     gtk_timeout_add (50, selection_scan_timeout, text_view);
4453
4454   return TRUE;
4455 }
4456
4457 static void
4458 gtk_text_view_start_selection_drag (GtkTextView       *text_view,
4459                                     const GtkTextIter *iter,
4460                                     GdkEventButton    *button)
4461 {
4462   GtkTextIter newplace;
4463
4464   g_return_if_fail (text_view->selection_drag_handler == 0);
4465
4466   gtk_grab_add (GTK_WIDGET (text_view));
4467
4468   newplace = *iter;
4469
4470   gtk_text_buffer_place_cursor (get_buffer (text_view), &newplace);
4471
4472   text_view->selection_drag_handler = gtk_signal_connect (GTK_OBJECT (text_view),
4473                                                           "motion_notify_event",
4474                                                           GTK_SIGNAL_FUNC (selection_motion_event_handler),
4475                                                           NULL);
4476 }
4477
4478 /* returns whether we were really dragging */
4479 static gboolean
4480 gtk_text_view_end_selection_drag (GtkTextView *text_view, GdkEventButton *event)
4481 {
4482   if (text_view->selection_drag_handler == 0)
4483     return FALSE;
4484
4485   gtk_signal_disconnect (GTK_OBJECT (text_view), text_view->selection_drag_handler);
4486   text_view->selection_drag_handler = 0;
4487
4488   if (text_view->scroll_timeout != 0)
4489     {
4490       gtk_timeout_remove (text_view->scroll_timeout);
4491       text_view->scroll_timeout = 0;
4492     }
4493
4494   /* one last update to current position */
4495   DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
4496   move_mark_to_pointer_and_scroll (text_view, "insert");
4497
4498   gtk_grab_remove (GTK_WIDGET (text_view));
4499
4500   return TRUE;
4501 }
4502
4503 /*
4504  * Layout utils
4505  */
4506
4507 static void
4508 gtk_text_view_set_attributes_from_style (GtkTextView        *text_view,
4509                                          GtkTextAttributes  *values,
4510                                          GtkStyle           *style)
4511 {
4512   values->appearance.bg_color = style->base[GTK_STATE_NORMAL];
4513   values->appearance.fg_color = style->text[GTK_STATE_NORMAL];
4514
4515   if (values->font)
4516     pango_font_description_free (values->font);
4517
4518   values->font = pango_font_description_copy (style->font_desc);
4519 }
4520
4521 static void
4522 gtk_text_view_check_keymap_direction (GtkTextView *text_view)
4523 {
4524   if (text_view->layout)
4525     {
4526       gboolean split_cursor;
4527       GtkTextDirection new_dir;
4528       GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
4529
4530       g_object_get (G_OBJECT (settings),
4531                     "gtk-split-cursor", &split_cursor,
4532                     NULL);
4533       if (split_cursor)
4534         new_dir = GTK_TEXT_DIR_NONE;
4535       else
4536         new_dir = (gdk_keymap_get_direction (gdk_keymap_get_default ()) == PANGO_DIRECTION_LTR) ?
4537           GTK_TEXT_DIR_LTR : GTK_TEXT_DIR_RTL;
4538
4539       if (text_view->layout->cursor_direction != new_dir)
4540         gtk_text_layout_set_cursor_direction (text_view->layout, new_dir);
4541     }
4542 }
4543
4544 static void
4545 gtk_text_view_ensure_layout (GtkTextView *text_view)
4546 {
4547   GtkWidget *widget;
4548
4549   widget = GTK_WIDGET (text_view);
4550
4551   if (text_view->layout == NULL)
4552     {
4553       GtkTextAttributes *style;
4554       PangoContext *ltr_context, *rtl_context;
4555       GSList *tmp_list;
4556
4557       DV(g_print(G_STRLOC"\n"));
4558
4559       text_view->layout = gtk_text_layout_new ();
4560
4561       g_signal_connect (G_OBJECT (text_view->layout),
4562                         "invalidated",
4563                         G_CALLBACK (invalidated_handler),
4564                         text_view);
4565
4566       g_signal_connect (G_OBJECT (text_view->layout),
4567                         "changed",
4568                         G_CALLBACK (changed_handler),
4569                         text_view);
4570
4571       g_signal_connect (G_OBJECT (text_view->layout),
4572                         "allocate_child",
4573                         G_CALLBACK (gtk_text_view_child_allocated),
4574                         text_view);
4575
4576       if (get_buffer (text_view))
4577         gtk_text_layout_set_buffer (text_view->layout, get_buffer (text_view));
4578
4579       if ((GTK_WIDGET_HAS_FOCUS (text_view) && text_view->cursor_visible))
4580         gtk_text_view_pend_cursor_blink (text_view);
4581       else
4582         gtk_text_layout_set_cursor_visible (text_view->layout, FALSE);
4583
4584       ltr_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
4585       pango_context_set_base_dir (ltr_context, PANGO_DIRECTION_LTR);
4586       rtl_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
4587       pango_context_set_base_dir (rtl_context, PANGO_DIRECTION_RTL);
4588
4589       gtk_text_layout_set_contexts (text_view->layout, ltr_context, rtl_context);
4590
4591       g_object_unref (G_OBJECT (ltr_context));
4592       g_object_unref (G_OBJECT (rtl_context));
4593
4594       gtk_text_view_check_keymap_direction (text_view);
4595
4596       style = gtk_text_attributes_new ();
4597
4598       gtk_widget_ensure_style (widget);
4599       gtk_text_view_set_attributes_from_style (text_view,
4600                                                style, widget->style);
4601
4602       style->pixels_above_lines = text_view->pixels_above_lines;
4603       style->pixels_below_lines = text_view->pixels_below_lines;
4604       style->pixels_inside_wrap = text_view->pixels_inside_wrap;
4605       style->left_margin = text_view->left_margin;
4606       style->right_margin = text_view->right_margin;
4607       style->indent = text_view->indent;
4608       style->tabs = text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
4609
4610       style->wrap_mode = text_view->wrap_mode;
4611       style->justification = text_view->justify;
4612       style->direction = gtk_widget_get_direction (GTK_WIDGET (text_view));
4613
4614       gtk_text_layout_set_default_style (text_view->layout, style);
4615
4616       gtk_text_attributes_unref (style);
4617
4618       /* Set layout for all anchored children */
4619
4620       tmp_list = text_view->children;
4621       while (tmp_list != NULL)
4622         {
4623           GtkTextViewChild *vc = tmp_list->data;
4624
4625           if (vc->anchor)
4626             {
4627               gtk_text_anchored_child_set_layout (vc->widget,
4628                                                   text_view->layout);
4629               /* vc may now be invalid! */
4630             }
4631
4632           tmp_list = g_slist_next (tmp_list);
4633         }
4634     }
4635 }
4636
4637 /**
4638  * gtk_text_view_get_default_attributes:
4639  * @text_view: a #GtkTextView
4640  *
4641  * Obtains a copy of the default text attributes. These are the
4642  * attributes used for text unless a tag overrides them.
4643  * You'd typically pass the default attributes in to
4644  * gtk_text_tag_get_attributes() in order to get the
4645  * attributes in effect at a given text position.
4646  *
4647  * The return value is a copy owned by the caller of this function,
4648  * and should be freed.
4649  *
4650  * Return value: a new #GtkTextAttributes
4651  **/
4652 GtkTextAttributes*
4653 gtk_text_view_get_default_attributes (GtkTextView *text_view)
4654 {
4655   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
4656
4657   gtk_text_view_ensure_layout (text_view);
4658
4659   return gtk_text_attributes_copy (text_view->layout->default_style);
4660 }
4661
4662 static void
4663 gtk_text_view_destroy_layout (GtkTextView *text_view)
4664 {
4665   if (text_view->layout)
4666     {
4667       GSList *tmp_list;
4668
4669       if (text_view->incremental_validate_idle)
4670         {
4671           g_source_remove (text_view->incremental_validate_idle);
4672           text_view->incremental_validate_idle = 0;
4673         }
4674
4675       /* Remove layout from all anchored children */
4676
4677       tmp_list = text_view->children;
4678       while (tmp_list != NULL)
4679         {
4680           GtkTextViewChild *vc = tmp_list->data;
4681
4682           if (vc->anchor)
4683             {
4684               gtk_text_anchored_child_set_layout (vc->widget, NULL);
4685               /* vc may now be invalid! */
4686             }
4687
4688           tmp_list = g_slist_next (tmp_list);
4689         }
4690
4691       gtk_text_view_stop_cursor_blink (text_view);
4692       gtk_text_view_end_selection_drag (text_view, NULL);
4693
4694       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->layout),
4695                                             invalidated_handler, text_view);
4696       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->layout),
4697                                             changed_handler, text_view);
4698       g_object_unref (G_OBJECT (text_view->layout));
4699       text_view->layout = NULL;
4700     }
4701 }
4702
4703 static void
4704 gtk_text_view_reset_im_context (GtkTextView *text_view)
4705 {
4706   if (text_view->need_im_reset)
4707     {
4708       text_view->need_im_reset = FALSE;
4709       gtk_im_context_reset (text_view->im_context);
4710       gtk_text_view_update_im_spot_location (text_view);
4711     }
4712 }
4713
4714 /*
4715  * DND feature
4716  */
4717
4718 static void
4719 gtk_text_view_start_selection_dnd (GtkTextView       *text_view,
4720                                    const GtkTextIter *iter,
4721                                    GdkEventMotion    *event)
4722 {
4723   GdkDragContext *context;
4724   GtkTargetList *target_list;
4725
4726   text_view->drag_start_x = -1;
4727   text_view->drag_start_y = -1;
4728   text_view->pending_place_cursor_button = 0;
4729
4730   target_list = gtk_target_list_new (target_table,
4731                                      G_N_ELEMENTS (target_table));
4732
4733   context = gtk_drag_begin (GTK_WIDGET (text_view), target_list,
4734                             GDK_ACTION_COPY | GDK_ACTION_MOVE,
4735                             1, (GdkEvent*)event);
4736
4737   gtk_target_list_unref (target_list);
4738
4739   gtk_drag_set_icon_default (context);
4740 }
4741
4742 static void
4743 gtk_text_view_drag_begin (GtkWidget        *widget,
4744                           GdkDragContext   *context)
4745 {
4746   /* do nothing */
4747 }
4748
4749 static void
4750 gtk_text_view_drag_end (GtkWidget        *widget,
4751                         GdkDragContext   *context)
4752 {
4753   GtkTextView *text_view;
4754
4755   text_view = GTK_TEXT_VIEW (widget);
4756 }
4757
4758 static void
4759 gtk_text_view_drag_data_get (GtkWidget        *widget,
4760                              GdkDragContext   *context,
4761                              GtkSelectionData *selection_data,
4762                              guint             info,
4763                              guint             time)
4764 {
4765   GtkTextView *text_view;
4766
4767   text_view = GTK_TEXT_VIEW (widget);
4768
4769   if (selection_data->target == gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE))
4770     {
4771       GtkTextBuffer *buffer = gtk_text_view_get_buffer (text_view);
4772
4773       gtk_selection_data_set (selection_data,
4774                               gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE),
4775                               8, /* bytes */
4776                               (void*)&buffer,
4777                               sizeof (buffer));
4778     }
4779   else
4780     {
4781       gchar *str;
4782       GtkTextIter start;
4783       GtkTextIter end;
4784
4785       str = NULL;
4786
4787       if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
4788                                                 &start, &end))
4789         {
4790           /* Extract the selected text */
4791           str = gtk_text_iter_get_visible_text (&start, &end);
4792         }
4793
4794       if (str)
4795         {
4796           gtk_selection_data_set_text (selection_data, str);
4797           g_free (str);
4798         }
4799     }
4800 }
4801
4802 static void
4803 gtk_text_view_drag_data_delete (GtkWidget        *widget,
4804                                 GdkDragContext   *context)
4805 {
4806   GtkTextView *text_view;
4807
4808   text_view = GTK_TEXT_VIEW (widget);
4809
4810   gtk_text_buffer_delete_selection (GTK_TEXT_VIEW (widget)->buffer,
4811                                     TRUE, GTK_TEXT_VIEW (widget)->editable);
4812 }
4813
4814 static void
4815 gtk_text_view_drag_leave (GtkWidget        *widget,
4816                           GdkDragContext   *context,
4817                           guint             time)
4818 {
4819   GtkTextView *text_view;
4820
4821   text_view = GTK_TEXT_VIEW (widget);
4822
4823   gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
4824
4825   if (text_view->scroll_timeout != 0)
4826     gtk_timeout_remove (text_view->scroll_timeout);
4827
4828   text_view->scroll_timeout = 0;
4829 }
4830
4831 static gboolean
4832 gtk_text_view_drag_motion (GtkWidget        *widget,
4833                            GdkDragContext   *context,
4834                            gint              x,
4835                            gint              y,
4836                            guint             time)
4837 {
4838   GtkTextIter newplace;
4839   GtkTextView *text_view;
4840   GtkTextIter start;
4841   GtkTextIter end;
4842   GdkRectangle target_rect;
4843   gint bx, by;
4844   GdkDragAction suggested_action = 0;
4845
4846   text_view = GTK_TEXT_VIEW (widget);
4847
4848   target_rect = text_view->text_window->allocation;
4849
4850   if (x < target_rect.x ||
4851       y < target_rect.y ||
4852       x > (target_rect.x + target_rect.width) ||
4853       y > (target_rect.y + target_rect.height))
4854     return FALSE; /* outside the text window, allow parent widgets to handle event */
4855
4856   gtk_text_view_window_to_buffer_coords (text_view,
4857                                          GTK_TEXT_WINDOW_WIDGET,
4858                                          x, y,
4859                                          &bx, &by);
4860
4861   gtk_text_layout_get_iter_at_pixel (text_view->layout,
4862                                      &newplace,
4863                                      bx, by);
4864
4865   if (gtk_drag_dest_find_target (widget, context,
4866                                  gtk_drag_dest_get_target_list (widget)) == GDK_NONE)
4867     {
4868       /* can't accept any of the offered targets */
4869     }
4870   else if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
4871                                             &start, &end) &&
4872            gtk_text_iter_in_range (&newplace, &start, &end))
4873     {
4874       /* We're inside the selection. */
4875     }
4876   else
4877     {
4878       if (gtk_text_iter_can_insert (&newplace, text_view->editable))
4879         {
4880           GtkWidget *source_widget;
4881
4882           suggested_action = context->suggested_action;
4883
4884           source_widget = gtk_drag_get_source_widget (context);
4885
4886           if (source_widget == widget)
4887             {
4888               /* Default to MOVE, unless the user has
4889                * pressed ctrl or alt to affect available actions
4890                */
4891               if ((context->actions & GDK_ACTION_MOVE) != 0)
4892                 suggested_action = GDK_ACTION_MOVE;
4893             }
4894         }
4895       else
4896         {
4897           /* Can't drop here. */
4898         }
4899     }
4900
4901   if (suggested_action != 0)
4902     {
4903       gtk_text_mark_set_visible (text_view->dnd_mark,
4904                                  text_view->cursor_visible);
4905
4906       gdk_drag_status (context, suggested_action, time);
4907     }
4908   else
4909     {
4910       gdk_drag_status (context, 0, time);
4911       gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
4912     }
4913
4914   gtk_text_buffer_move_mark (get_buffer (text_view),
4915                              text_view->dnd_mark,
4916                              &newplace);
4917
4918   DV(g_print (G_STRLOC": scrolling to mark\n"));
4919   gtk_text_view_scroll_to_mark (text_view,
4920                                 text_view->dnd_mark,
4921                                 DND_SCROLL_MARGIN, FALSE, 0.0, 0.0);
4922
4923   if (text_view->scroll_timeout != 0) /* reset on every motion event */
4924     gtk_timeout_remove (text_view->scroll_timeout);
4925
4926   text_view->scroll_timeout =
4927     gtk_timeout_add (50, drag_scan_timeout, text_view);
4928
4929   /* TRUE return means don't propagate the drag motion to parent
4930    * widgets that may also be drop sites.
4931    */
4932   return TRUE;
4933 }
4934
4935 static gboolean
4936 gtk_text_view_drag_drop (GtkWidget        *widget,
4937                          GdkDragContext   *context,
4938                          gint              x,
4939                          gint              y,
4940                          guint             time)
4941 {
4942   GtkTextView *text_view;
4943   GtkTextIter drop_point;
4944   GdkAtom target = GDK_NONE;
4945
4946   text_view = GTK_TEXT_VIEW (widget);
4947
4948   if (text_view->scroll_timeout != 0)
4949     gtk_timeout_remove (text_view->scroll_timeout);
4950
4951   text_view->scroll_timeout = 0;
4952
4953   gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
4954
4955   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4956                                     &drop_point,
4957                                     text_view->dnd_mark);
4958
4959   if (gtk_text_iter_can_insert (&drop_point, text_view->editable))
4960     target = gtk_drag_dest_find_target (widget, context, NULL);
4961
4962   if (target != GDK_NONE)
4963     gtk_drag_get_data (widget, context, target, time);
4964   else
4965     gtk_drag_finish (context, FALSE, FALSE, time);
4966
4967   return TRUE;
4968 }
4969
4970 static void
4971 insert_text_data (GtkTextView      *text_view,
4972                   GtkTextIter      *drop_point,
4973                   GtkSelectionData *selection_data)
4974 {
4975   gchar *str;
4976
4977   str = gtk_selection_data_get_text (selection_data);
4978
4979   if (str)
4980     {
4981       gtk_text_buffer_insert_interactive (get_buffer (text_view),
4982                                           drop_point, str, -1,
4983                                           text_view->editable);
4984       g_free (str);
4985     }
4986 }
4987
4988 static void
4989 gtk_text_view_drag_data_received (GtkWidget        *widget,
4990                                   GdkDragContext   *context,
4991                                   gint              x,
4992                                   gint              y,
4993                                   GtkSelectionData *selection_data,
4994                                   guint             info,
4995                                   guint             time)
4996 {
4997   GtkTextIter drop_point;
4998   GtkTextView *text_view;
4999   gboolean success = FALSE;
5000
5001   text_view = GTK_TEXT_VIEW (widget);
5002
5003   if (!text_view->dnd_mark)
5004     goto done;
5005
5006   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
5007                                     &drop_point,
5008                                     text_view->dnd_mark);
5009
5010   if (!gtk_text_iter_can_insert (&drop_point, text_view->editable))
5011     goto done;
5012
5013   if (selection_data->target == gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE))
5014     {
5015       GtkTextBuffer *src_buffer = NULL;
5016       GtkTextIter start, end;
5017       gboolean copy_tags = TRUE;
5018
5019       if (selection_data->length != sizeof (src_buffer))
5020         return;
5021
5022       memcpy (&src_buffer, selection_data->data, sizeof (src_buffer));
5023
5024       if (src_buffer == NULL)
5025         return;
5026
5027       g_return_if_fail (GTK_IS_TEXT_BUFFER (src_buffer));
5028
5029       if (gtk_text_buffer_get_tag_table (src_buffer) !=
5030           gtk_text_buffer_get_tag_table (get_buffer (text_view)))
5031         copy_tags = FALSE;
5032
5033       if (gtk_text_buffer_get_selection_bounds (src_buffer,
5034                                                 &start,
5035                                                 &end))
5036         {
5037           if (copy_tags)
5038             gtk_text_buffer_insert_range_interactive (get_buffer (text_view),
5039                                                       &drop_point,
5040                                                       &start,
5041                                                       &end,
5042                                                       text_view->editable);
5043           else
5044             {
5045               gchar *str;
5046
5047               str = gtk_text_iter_get_visible_text (&start, &end);
5048               gtk_text_buffer_insert_interactive (get_buffer (text_view),
5049                                                   &drop_point, str, -1,
5050                                                   text_view->editable);
5051               g_free (str);
5052             }
5053         }
5054     }
5055   else
5056     insert_text_data (text_view, &drop_point, selection_data);
5057
5058   success = TRUE;
5059
5060  done:
5061   gtk_drag_finish (context, success,
5062                    success && context->action == GDK_ACTION_MOVE,
5063                    time);
5064 }
5065
5066 static GtkAdjustment*
5067 get_hadjustment (GtkTextView *text_view)
5068 {
5069   if (text_view->hadjustment == NULL)
5070     gtk_text_view_set_scroll_adjustments (text_view,
5071                                           NULL, /* forces creation */
5072                                           text_view->vadjustment);
5073
5074   return text_view->hadjustment;
5075 }
5076
5077 static GtkAdjustment*
5078 get_vadjustment (GtkTextView *text_view)
5079 {
5080   if (text_view->vadjustment == NULL)
5081     gtk_text_view_set_scroll_adjustments (text_view,
5082                                           text_view->hadjustment,
5083                                           NULL); /* forces creation */
5084   return text_view->vadjustment;
5085 }
5086
5087
5088 static void
5089 gtk_text_view_set_scroll_adjustments (GtkTextView   *text_view,
5090                                       GtkAdjustment *hadj,
5091                                       GtkAdjustment *vadj)
5092 {
5093   gboolean need_adjust = FALSE;
5094
5095   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
5096
5097   if (hadj)
5098     g_return_if_fail (GTK_IS_ADJUSTMENT (hadj));
5099   else
5100     hadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
5101   if (vadj)
5102     g_return_if_fail (GTK_IS_ADJUSTMENT (vadj));
5103   else
5104     vadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
5105
5106   if (text_view->hadjustment && (text_view->hadjustment != hadj))
5107     {
5108       gtk_signal_disconnect_by_data (GTK_OBJECT (text_view->hadjustment), text_view);
5109       g_object_unref (G_OBJECT (text_view->hadjustment));
5110     }
5111
5112   if (text_view->vadjustment && (text_view->vadjustment != vadj))
5113     {
5114       gtk_signal_disconnect_by_data (GTK_OBJECT (text_view->vadjustment), text_view);
5115       g_object_unref (G_OBJECT (text_view->vadjustment));
5116     }
5117
5118   if (text_view->hadjustment != hadj)
5119     {
5120       text_view->hadjustment = hadj;
5121       g_object_ref (G_OBJECT (text_view->hadjustment));
5122       gtk_object_sink (GTK_OBJECT (text_view->hadjustment));
5123
5124       gtk_signal_connect (GTK_OBJECT (text_view->hadjustment), "value_changed",
5125                           (GtkSignalFunc) gtk_text_view_value_changed,
5126                           text_view);
5127       need_adjust = TRUE;
5128     }
5129
5130   if (text_view->vadjustment != vadj)
5131     {
5132       text_view->vadjustment = vadj;
5133       g_object_ref (G_OBJECT (text_view->vadjustment));
5134       gtk_object_sink (GTK_OBJECT (text_view->vadjustment));
5135
5136       gtk_signal_connect (GTK_OBJECT (text_view->vadjustment), "value_changed",
5137                           (GtkSignalFunc) gtk_text_view_value_changed,
5138                           text_view);
5139       need_adjust = TRUE;
5140     }
5141
5142   if (need_adjust)
5143     gtk_text_view_value_changed (NULL, text_view);
5144 }
5145
5146 static void
5147 gtk_text_view_value_changed (GtkAdjustment *adj,
5148                              GtkTextView   *text_view)
5149 {
5150   GtkTextIter iter;
5151   gint line_top;
5152   gint dx = 0;
5153   gint dy = 0;
5154
5155   /* Note that we oddly call this function with adj == NULL
5156    * sometimes
5157    */
5158
5159   text_view->onscreen_validated = FALSE;
5160
5161   DV(g_print(">Scroll offset changed %s/%g, onscreen_validated = FALSE ("G_STRLOC")\n",
5162              adj == text_view->hadjustment ? "hadj" : adj == text_view->vadjustment ? "vadj" : "none",
5163              adj ? adj->value : 0.0));
5164
5165   if (adj == text_view->hadjustment)
5166     {
5167       dx = text_view->xoffset - (gint)adj->value;
5168       text_view->xoffset = adj->value;
5169     }
5170   else if (adj == text_view->vadjustment)
5171     {
5172       dy = text_view->yoffset - (gint)adj->value;
5173       text_view->yoffset = adj->value;
5174
5175       if (text_view->layout)
5176         {
5177           gtk_text_layout_get_line_at_y (text_view->layout, &iter, adj->value, &line_top);
5178
5179           gtk_text_buffer_move_mark (get_buffer (text_view), text_view->first_para_mark, &iter);
5180
5181           text_view->first_para_pixels = adj->value - line_top;
5182         }
5183     }
5184
5185   if (GTK_WIDGET_REALIZED (text_view) && (dx != 0 || dy != 0))
5186     {
5187       if (dy != 0)
5188         {
5189           if (text_view->left_window)
5190             text_window_scroll (text_view->left_window, 0, dy);
5191           if (text_view->right_window)
5192             text_window_scroll (text_view->right_window, 0, dy);
5193         }
5194
5195       if (dx != 0)
5196         {
5197           if (text_view->top_window)
5198             text_window_scroll (text_view->top_window, dx, 0);
5199           if (text_view->bottom_window)
5200             text_window_scroll (text_view->bottom_window, dx, 0);
5201         }
5202
5203       /* It looks nicer to scroll the main area last, because
5204        * it takes a while, and making the side areas update
5205        * afterward emphasizes the slowness of scrolling the
5206        * main area.
5207        */
5208       text_window_scroll (text_view->text_window, dx, dy);
5209     }
5210
5211   /* This could result in invalidation, which would install the
5212    * first_validate_idle, which would validate onscreen;
5213    * but we're going to go ahead and validate here, so
5214    * first_validate_idle shouldn't have anything to do.
5215    */
5216   gtk_text_view_update_layout_width (text_view);
5217
5218   /* note that validation of onscreen could invoke this function
5219    * recursively, by scrolling to maintain first_para, or in response
5220    * to updating the layout width, however there is no problem with
5221    * that, or shouldn't be.
5222    */
5223   gtk_text_view_validate_onscreen (text_view);
5224
5225   /* process exposes */
5226   if (GTK_WIDGET_REALIZED (text_view))
5227     {
5228       if (text_view->left_window)
5229         gdk_window_process_updates (text_view->left_window->bin_window, TRUE);
5230
5231       if (text_view->right_window)
5232         gdk_window_process_updates (text_view->right_window->bin_window, TRUE);
5233
5234       if (text_view->top_window)
5235         gdk_window_process_updates (text_view->top_window->bin_window, TRUE);
5236
5237       if (text_view->bottom_window)
5238         gdk_window_process_updates (text_view->bottom_window->bin_window, TRUE);
5239
5240       gdk_window_process_updates (text_view->text_window->bin_window, TRUE);
5241     }
5242
5243   /* If this got installed, get rid of it, it's just a waste of time. */
5244   if (text_view->first_validate_idle != 0)
5245     {
5246       g_source_remove (text_view->first_validate_idle);
5247       text_view->first_validate_idle = 0;
5248     }
5249
5250   gtk_text_view_update_im_spot_location (text_view);
5251
5252   DV(g_print(">End scroll offset changed handler ("G_STRLOC")\n"));
5253 }
5254
5255 static void
5256 gtk_text_view_commit_handler (GtkIMContext  *context,
5257                               const gchar   *str,
5258                               GtkTextView   *text_view)
5259 {
5260   gboolean had_selection;
5261
5262   gtk_text_buffer_begin_user_action (get_buffer (text_view));
5263
5264   had_selection = gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
5265                                                         NULL, NULL);
5266
5267   gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
5268                                     text_view->editable);
5269
5270   if (!strcmp (str, "\n"))
5271     {
5272       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\n", 1,
5273                                                     text_view->editable);
5274     }
5275   else
5276     {
5277       if (!had_selection && text_view->overwrite_mode)
5278         gtk_text_view_delete_from_cursor (text_view, GTK_DELETE_CHARS, 1);
5279       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
5280                                                     text_view->editable);
5281     }
5282
5283   gtk_text_buffer_end_user_action (get_buffer (text_view));
5284
5285   DV(g_print (G_STRLOC": scrolling onscreen\n"));
5286   gtk_text_view_scroll_mark_onscreen (text_view,
5287                                       gtk_text_buffer_get_mark (get_buffer (text_view),
5288                                                                 "insert"));
5289 }
5290
5291 static void
5292 gtk_text_view_preedit_changed_handler (GtkIMContext *context,
5293                                        GtkTextView  *text_view)
5294 {
5295   gchar *str;
5296   PangoAttrList *attrs;
5297   gint cursor_pos;
5298
5299   gtk_im_context_get_preedit_string (context, &str, &attrs, &cursor_pos);
5300   gtk_text_layout_set_preedit_string (text_view->layout, str, attrs, cursor_pos);
5301
5302   pango_attr_list_unref (attrs);
5303   g_free (str);
5304 }
5305
5306 static void
5307 gtk_text_view_mark_set_handler (GtkTextBuffer     *buffer,
5308                                 const GtkTextIter *location,
5309                                 GtkTextMark       *mark,
5310                                 gpointer           data)
5311 {
5312   GtkTextView *text_view = GTK_TEXT_VIEW (data);
5313   gboolean need_reset = FALSE;
5314
5315   if (mark == gtk_text_buffer_get_insert (buffer))
5316     {
5317       text_view->virtual_cursor_x = -1;
5318       text_view->virtual_cursor_y = -1;
5319       need_reset = TRUE;
5320     }
5321   else if (mark == gtk_text_buffer_get_selection_bound (buffer))
5322     {
5323       need_reset = TRUE;
5324     }
5325
5326   if (need_reset)
5327     gtk_text_view_reset_im_context (text_view);
5328 }
5329
5330 static void
5331 gtk_text_view_get_virtual_cursor_pos (GtkTextView *text_view,
5332                                       gint        *x,
5333                                       gint        *y)
5334 {
5335   GdkRectangle strong_pos;
5336   GtkTextIter insert;
5337
5338   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
5339                                     gtk_text_buffer_get_mark (get_buffer (text_view),
5340                                                               "insert"));
5341
5342   if ((x && text_view->virtual_cursor_x == -1) ||
5343       (y && text_view->virtual_cursor_y == -1))
5344     gtk_text_layout_get_cursor_locations (text_view->layout, &insert, &strong_pos, NULL);
5345
5346   if (x)
5347     {
5348       if (text_view->virtual_cursor_x != -1)
5349         *x = text_view->virtual_cursor_x;
5350       else
5351         *x = strong_pos.x;
5352     }
5353
5354   if (y)
5355     {
5356       if (text_view->virtual_cursor_x != -1)
5357         *y = text_view->virtual_cursor_y;
5358       else
5359         *y = strong_pos.y + strong_pos.height / 2;
5360     }
5361 }
5362
5363 static void
5364 gtk_text_view_set_virtual_cursor_pos (GtkTextView *text_view,
5365                                       gint         x,
5366                                       gint         y)
5367 {
5368   GdkRectangle strong_pos;
5369   GtkTextIter insert;
5370
5371   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
5372                                     gtk_text_buffer_get_mark (get_buffer (text_view),
5373                                                               "insert"));
5374
5375   if (x == -1 || y == -1)
5376     gtk_text_layout_get_cursor_locations (text_view->layout, &insert, &strong_pos, NULL);
5377
5378   text_view->virtual_cursor_x = (x == -1) ? strong_pos.x : x;
5379   text_view->virtual_cursor_y = (y == -1) ? strong_pos.y + strong_pos.height / 2 : y;
5380 }
5381
5382 /* Quick hack of a popup menu
5383  */
5384 static void
5385 activate_cb (GtkWidget   *menuitem,
5386              GtkTextView *text_view)
5387 {
5388   const gchar *signal = g_object_get_data (G_OBJECT (menuitem), "gtk-signal");
5389   gtk_signal_emit_by_name (GTK_OBJECT (text_view), signal);
5390 }
5391
5392 static void
5393 append_action_signal (GtkTextView  *text_view,
5394                       GtkWidget    *menu,
5395                       const gchar  *stock_id,
5396                       const gchar  *signal,
5397                       gboolean      sensitive)
5398 {
5399   GtkWidget *menuitem = gtk_image_menu_item_new_from_stock (stock_id, NULL);
5400
5401   g_object_set_data (G_OBJECT (menuitem), "gtk-signal", (char *)signal);
5402   gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
5403                       GTK_SIGNAL_FUNC (activate_cb), text_view);
5404
5405   gtk_widget_set_sensitive (menuitem, sensitive);
5406
5407   gtk_widget_show (menuitem);
5408   gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
5409 }
5410
5411 static void
5412 popup_menu_detach (GtkWidget *attach_widget,
5413                    GtkMenu   *menu)
5414 {
5415   GTK_TEXT_VIEW (attach_widget)->popup_menu = NULL;
5416 }
5417
5418 static void
5419 popup_position_func (GtkMenu   *menu,
5420                      gint      *x,
5421                      gint      *y,
5422                      gboolean  *push_in,
5423                      gpointer   user_data)
5424 {
5425   GtkTextView *text_view;
5426   GtkWidget *widget;
5427   GdkRectangle cursor_rect;
5428   GdkRectangle onscreen_rect;
5429   gint root_x, root_y;
5430   GtkTextIter iter;
5431   GtkRequisition req;
5432
5433   text_view = GTK_TEXT_VIEW (user_data);
5434   widget = GTK_WIDGET (text_view);
5435
5436   g_return_if_fail (GTK_WIDGET_REALIZED (text_view));
5437
5438   gdk_window_get_origin (widget->window, &root_x, &root_y);
5439
5440   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
5441                                     &iter,
5442                                     gtk_text_buffer_get_insert (get_buffer (text_view)));
5443
5444   gtk_text_view_get_iter_location (text_view,
5445                                    &iter,
5446                                    &cursor_rect);
5447
5448   gtk_text_view_get_visible_rect (text_view, &onscreen_rect);
5449
5450   gtk_widget_size_request (text_view->popup_menu, &req);
5451
5452   /* can't use rectangle_intersect since cursor rect can have 0 width */
5453   if (cursor_rect.x >= onscreen_rect.x &&
5454       cursor_rect.x < onscreen_rect.x + onscreen_rect.width &&
5455       cursor_rect.y >= onscreen_rect.y &&
5456       cursor_rect.y < onscreen_rect.y + onscreen_rect.height)
5457     {
5458       gtk_text_view_buffer_to_window_coords (text_view,
5459                                              GTK_TEXT_WINDOW_WIDGET,
5460                                              cursor_rect.x, cursor_rect.y,
5461                                              &cursor_rect.x, &cursor_rect.y);
5462
5463       *x = root_x + cursor_rect.x + cursor_rect.width;
5464       *y = root_y + cursor_rect.y + cursor_rect.height;
5465     }
5466   else
5467     {
5468       /* Just center the menu, since cursor is offscreen. */
5469       *x = root_x + (widget->allocation.width / 2 - req.width / 2);
5470       *y = root_y + (widget->allocation.height / 2 - req.height / 2);
5471     }
5472
5473   /* Ensure sanity */
5474   *x = CLAMP (*x, root_x, (root_x + widget->allocation.width));
5475   *y = CLAMP (*y, root_y, (root_y + widget->allocation.height));
5476
5477   *x = CLAMP (*x, 0, MAX (0, gdk_screen_width () - req.width));
5478   *y = CLAMP (*y, 0, MAX (0, gdk_screen_height () - req.height));
5479 }
5480
5481 typedef struct
5482 {
5483   GtkTextView *text_view;
5484   gint button;
5485   guint time;
5486 } PopupInfo;
5487
5488 static gboolean
5489 range_contains_editable_text (const GtkTextIter *start,
5490                               const GtkTextIter *end,
5491                               gboolean default_editability)
5492 {
5493   GtkTextIter iter = *start;
5494
5495   while (gtk_text_iter_compare (&iter, end) < 0)
5496     {
5497       if (gtk_text_iter_editable (&iter, default_editability))
5498         return TRUE;
5499
5500       gtk_text_iter_forward_to_tag_toggle (&iter, NULL);
5501     }
5502
5503   return FALSE;
5504 }
5505
5506 static void
5507 popup_targets_received (GtkClipboard     *clipboard,
5508                         GtkSelectionData *data,
5509                         gpointer          user_data)
5510 {
5511   PopupInfo *info = user_data;
5512   GtkTextView *text_view = info->text_view;
5513
5514   if (GTK_WIDGET_REALIZED (text_view))
5515     {
5516       /* We implicitely rely here on the fact that if we are pasting ourself, we'll
5517        * have text targets as well as the private GTK_TEXT_BUFFER_CONTENTS target.
5518        */
5519       gboolean clipboard_contains_text = gtk_selection_data_targets_include_text (data);
5520       GtkWidget *menuitem;
5521       GtkWidget *submenu;
5522       gboolean have_selection;
5523       gboolean can_insert;
5524       GtkTextIter iter;
5525       GtkTextIter sel_start, sel_end;
5526
5527       if (text_view->popup_menu)
5528         gtk_widget_destroy (text_view->popup_menu);
5529
5530       text_view->popup_menu = gtk_menu_new ();
5531
5532       gtk_menu_attach_to_widget (GTK_MENU (text_view->popup_menu),
5533                                  GTK_WIDGET (text_view),
5534                                  popup_menu_detach);
5535
5536       have_selection = gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
5537                                                              &sel_start, &sel_end);
5538
5539       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
5540                                         &iter,
5541                                         gtk_text_buffer_get_insert (get_buffer (text_view)));
5542
5543       can_insert = gtk_text_iter_can_insert (&iter, text_view->editable);
5544
5545       append_action_signal (text_view, text_view->popup_menu, GTK_STOCK_CUT, "cut_clipboard",
5546                             have_selection &&
5547                             range_contains_editable_text (&sel_start, &sel_end,
5548                                                           text_view->editable));
5549       append_action_signal (text_view, text_view->popup_menu, GTK_STOCK_COPY, "copy_clipboard",
5550                             have_selection);
5551       append_action_signal (text_view, text_view->popup_menu, GTK_STOCK_PASTE, "paste_clipboard",
5552                             can_insert && clipboard_contains_text);
5553
5554       menuitem = gtk_separator_menu_item_new ();
5555       gtk_widget_show (menuitem);
5556       gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
5557
5558       menuitem = gtk_menu_item_new_with_label (_("Input Methods"));
5559       gtk_widget_show (menuitem);
5560       submenu = gtk_menu_new ();
5561       gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), submenu);
5562       gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
5563
5564       gtk_im_multicontext_append_menuitems (GTK_IM_MULTICONTEXT (text_view->im_context),
5565                                             GTK_MENU_SHELL (submenu));
5566
5567       gtk_signal_emit (GTK_OBJECT (text_view),
5568                        signals[POPULATE_POPUP],
5569                        text_view->popup_menu);
5570
5571       if (info->button)
5572         gtk_menu_popup (GTK_MENU (text_view->popup_menu), NULL, NULL,
5573                         NULL, NULL,
5574                         info->button, info->time);
5575       else
5576         gtk_menu_popup (GTK_MENU (text_view->popup_menu), NULL, NULL,
5577                         popup_position_func, text_view,
5578                         0, gtk_get_current_event_time ());
5579     }
5580
5581   g_object_unref (text_view);
5582   g_free (info);
5583 }
5584
5585 static void
5586 gtk_text_view_do_popup (GtkTextView    *text_view,
5587                         GdkEventButton *event)
5588 {
5589   PopupInfo *info = g_new (PopupInfo, 1);
5590
5591   /* In order to know what entries we should make sensitive, we
5592    * ask for the current targets of the clipboard, and when
5593    * we get them, then we actually pop up the menu.
5594    */
5595   info->text_view = g_object_ref (text_view);
5596
5597   if (event)
5598     {
5599       info->button = event->button;
5600       info->time = event->time;
5601     }
5602   else
5603     {
5604       info->button = 0;
5605       info->time = gtk_get_current_event_time ();
5606     }
5607
5608   gtk_clipboard_request_contents (gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
5609                                   gdk_atom_intern ("TARGETS", FALSE),
5610                                   popup_targets_received,
5611                                   info);
5612 }
5613
5614 static void
5615 gtk_text_view_popup_menu (GtkWidget *widget)
5616 {
5617   gtk_text_view_do_popup (GTK_TEXT_VIEW (widget), NULL);
5618 }
5619
5620 /* Child GdkWindows */
5621
5622
5623 static GtkTextWindow*
5624 text_window_new (GtkTextWindowType  type,
5625                  GtkWidget         *widget,
5626                  gint               width_request,
5627                  gint               height_request)
5628 {
5629   GtkTextWindow *win;
5630
5631   win = g_new (GtkTextWindow, 1);
5632
5633   win->type = type;
5634   win->widget = widget;
5635   win->window = NULL;
5636   win->bin_window = NULL;
5637   win->requisition.width = width_request;
5638   win->requisition.height = height_request;
5639   win->allocation.width = width_request;
5640   win->allocation.height = height_request;
5641   win->allocation.x = 0;
5642   win->allocation.y = 0;
5643
5644   return win;
5645 }
5646
5647 static void
5648 text_window_free (GtkTextWindow *win)
5649 {
5650   if (win->window)
5651     text_window_unrealize (win);
5652
5653   g_free (win);
5654 }
5655
5656 static void
5657 text_window_realize (GtkTextWindow *win,
5658                      GdkWindow     *parent)
5659 {
5660   GdkWindowAttr attributes;
5661   gint attributes_mask;
5662   GdkCursor *cursor;
5663
5664   attributes.window_type = GDK_WINDOW_CHILD;
5665   attributes.x = win->allocation.x;
5666   attributes.y = win->allocation.y;
5667   attributes.width = win->allocation.width;
5668   attributes.height = win->allocation.height;
5669   attributes.wclass = GDK_INPUT_OUTPUT;
5670   attributes.visual = gtk_widget_get_visual (win->widget);
5671   attributes.colormap = gtk_widget_get_colormap (win->widget);
5672   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK;
5673
5674   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
5675
5676   win->window = gdk_window_new (parent,
5677                                 &attributes,
5678                                 attributes_mask);
5679
5680   gdk_window_show (win->window);
5681   gdk_window_set_user_data (win->window, win->widget);
5682
5683   attributes.x = 0;
5684   attributes.y = 0;
5685   attributes.width = win->allocation.width;
5686   attributes.height = win->allocation.height;
5687   attributes.event_mask = (GDK_EXPOSURE_MASK            |
5688                            GDK_SCROLL_MASK              |
5689                            GDK_KEY_PRESS_MASK           |
5690                            GDK_BUTTON_PRESS_MASK        |
5691                            GDK_BUTTON_RELEASE_MASK      |
5692                            GDK_POINTER_MOTION_MASK      |
5693                            GDK_POINTER_MOTION_HINT_MASK |
5694                            gtk_widget_get_events (win->widget));
5695
5696   win->bin_window = gdk_window_new (win->window,
5697                                     &attributes,
5698                                     attributes_mask);
5699
5700   gdk_window_show (win->bin_window);
5701   gdk_window_set_user_data (win->bin_window, win->widget);
5702
5703   if (win->type == GTK_TEXT_WINDOW_TEXT)
5704     {
5705       /* I-beam cursor */
5706       cursor = gdk_cursor_new (GDK_XTERM);
5707       gdk_window_set_cursor (win->bin_window, cursor);
5708       gdk_cursor_destroy (cursor);
5709
5710       gtk_im_context_set_client_window (GTK_TEXT_VIEW (win->widget)->im_context,
5711                                         win->window);
5712
5713
5714       gdk_window_set_background (win->bin_window,
5715                                  &win->widget->style->base[GTK_WIDGET_STATE (win->widget)]);
5716     }
5717   else
5718     {
5719       gdk_window_set_background (win->bin_window,
5720                                  &win->widget->style->bg[GTK_WIDGET_STATE (win->widget)]);
5721     }
5722
5723   g_object_set_qdata (G_OBJECT (win->window),
5724                       g_quark_from_static_string ("gtk-text-view-text-window"),
5725                       win);
5726
5727   g_object_set_qdata (G_OBJECT (win->bin_window),
5728                       g_quark_from_static_string ("gtk-text-view-text-window"),
5729                       win);
5730 }
5731
5732 static void
5733 text_window_unrealize (GtkTextWindow *win)
5734 {
5735   if (win->type == GTK_TEXT_WINDOW_TEXT)
5736     {
5737       gtk_im_context_set_client_window (GTK_TEXT_VIEW (win->widget)->im_context,
5738                                         NULL);
5739     }
5740
5741   gdk_window_set_user_data (win->window, NULL);
5742   gdk_window_set_user_data (win->bin_window, NULL);
5743   gdk_window_destroy (win->bin_window);
5744   gdk_window_destroy (win->window);
5745   win->window = NULL;
5746   win->bin_window = NULL;
5747 }
5748
5749 static void
5750 text_window_size_allocate (GtkTextWindow *win,
5751                            GdkRectangle  *rect)
5752 {
5753   win->allocation = *rect;
5754
5755   if (win->window)
5756     {
5757       gdk_window_move_resize (win->window,
5758                               rect->x, rect->y,
5759                               rect->width, rect->height);
5760
5761       gdk_window_resize (win->bin_window,
5762                          rect->width, rect->height);
5763     }
5764 }
5765
5766 static void
5767 text_window_scroll        (GtkTextWindow *win,
5768                            gint           dx,
5769                            gint           dy)
5770 {
5771   if (dx != 0 || dy != 0)
5772     {
5773       gdk_window_scroll (win->bin_window, dx, dy);
5774     }
5775 }
5776
5777 void
5778 text_window_invalidate_rect (GtkTextWindow *win,
5779                              GdkRectangle  *rect)
5780 {
5781   GdkRectangle window_rect;
5782
5783   gtk_text_view_buffer_to_window_coords (GTK_TEXT_VIEW (win->widget),
5784                                          win->type,
5785                                          rect->x,
5786                                          rect->y,
5787                                          &window_rect.x,
5788                                          &window_rect.y);
5789
5790   window_rect.width = rect->width;
5791   window_rect.height = rect->height;
5792
5793   /* Adjust the rect as appropriate */
5794
5795   switch (win->type)
5796     {
5797     case GTK_TEXT_WINDOW_TEXT:
5798       break;
5799
5800     case GTK_TEXT_WINDOW_LEFT:
5801     case GTK_TEXT_WINDOW_RIGHT:
5802       window_rect.x = 0;
5803       window_rect.width = win->allocation.width;
5804       break;
5805
5806     case GTK_TEXT_WINDOW_TOP:
5807     case GTK_TEXT_WINDOW_BOTTOM:
5808       window_rect.y = 0;
5809       window_rect.height = win->allocation.height;
5810       break;
5811
5812     default:
5813       g_warning ("%s: bug!", G_STRLOC);
5814       return;
5815       break;
5816     }
5817
5818   gdk_window_invalidate_rect (win->bin_window, &window_rect, FALSE);
5819
5820 #if 0
5821   {
5822     GdkColor color = { 0, 65535, 0, 0 };
5823     GdkGC *gc = gdk_gc_new (win->bin_window);
5824     gdk_gc_set_rgb_fg_color (gc, &color);
5825     gdk_draw_rectangle (win->bin_window,
5826                         gc, TRUE, window_rect.x, window_rect.y,
5827                         window_rect.width, window_rect.height);
5828     gdk_gc_unref (gc);
5829   }
5830 #endif
5831 }
5832
5833 static gint
5834 text_window_get_width (GtkTextWindow *win)
5835 {
5836   return win->allocation.width;
5837 }
5838
5839 static gint
5840 text_window_get_height (GtkTextWindow *win)
5841 {
5842   return win->allocation.height;
5843 }
5844
5845 static void
5846 text_window_get_allocation (GtkTextWindow *win,
5847                             GdkRectangle  *rect)
5848 {
5849   *rect = win->allocation;
5850 }
5851
5852 /* Windows */
5853
5854
5855 /**
5856  * gtk_text_view_get_window:
5857  * @text_view: a #GtkTextView
5858  * @win: window to get
5859  *
5860  * Retrieves the #GdkWindow corresponding to an area of the text view;
5861  * possible windows include the overall widget window, child windows
5862  * on the left, right, top, bottom, and the window that displays the
5863  * text buffer. Windows are %NULL and nonexistent if their width or
5864  * height is 0, and are nonexistent before the widget has been
5865  * realized.
5866  *
5867  * Return value: a #GdkWindow, or %NULL
5868  **/
5869 GdkWindow*
5870 gtk_text_view_get_window (GtkTextView *text_view,
5871                           GtkTextWindowType win)
5872 {
5873   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
5874
5875   switch (win)
5876     {
5877     case GTK_TEXT_WINDOW_WIDGET:
5878       return GTK_WIDGET (text_view)->window;
5879       break;
5880
5881     case GTK_TEXT_WINDOW_TEXT:
5882       return text_view->text_window->bin_window;
5883       break;
5884
5885     case GTK_TEXT_WINDOW_LEFT:
5886       if (text_view->left_window)
5887         return text_view->left_window->bin_window;
5888       else
5889         return NULL;
5890       break;
5891
5892     case GTK_TEXT_WINDOW_RIGHT:
5893       if (text_view->right_window)
5894         return text_view->right_window->bin_window;
5895       else
5896         return NULL;
5897       break;
5898
5899     case GTK_TEXT_WINDOW_TOP:
5900       if (text_view->top_window)
5901         return text_view->top_window->bin_window;
5902       else
5903         return NULL;
5904       break;
5905
5906     case GTK_TEXT_WINDOW_BOTTOM:
5907       if (text_view->bottom_window)
5908         return text_view->bottom_window->bin_window;
5909       else
5910         return NULL;
5911       break;
5912
5913     default:
5914       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
5915       return NULL;
5916       break;
5917     }
5918 }
5919
5920 /**
5921  * gtk_text_view_get_window_type:
5922  * @text_view: a #GtkTextView
5923  * @window: a window type
5924  *
5925  * Usually used to find out which window an event corresponds to.
5926  * If you connect to an event signal on @text_view, this function
5927  * should be called on <literal>event-&gt;window</literal> to
5928  * see which window it was.
5929  *
5930  * Return value: the window type.
5931  **/
5932 GtkTextWindowType
5933 gtk_text_view_get_window_type (GtkTextView *text_view,
5934                                GdkWindow   *window)
5935 {
5936   GtkTextWindow *win;
5937
5938   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
5939   g_return_val_if_fail (GDK_IS_WINDOW (window), 0);
5940
5941   if (window == GTK_WIDGET (text_view)->window)
5942     return GTK_TEXT_WINDOW_WIDGET;
5943
5944   win = g_object_get_qdata (G_OBJECT (window),
5945                             g_quark_try_string ("gtk-text-view-text-window"));
5946
5947   if (win)
5948     return win->type;
5949   else
5950     {
5951       return GTK_TEXT_WINDOW_PRIVATE;
5952     }
5953 }
5954
5955 static void
5956 buffer_to_widget (GtkTextView      *text_view,
5957                   gint              buffer_x,
5958                   gint              buffer_y,
5959                   gint             *window_x,
5960                   gint             *window_y)
5961 {
5962   gint focus_edge_width;
5963   gboolean interior_focus;
5964
5965   gtk_widget_style_get (GTK_WIDGET (text_view), "interior_focus", &interior_focus, NULL);
5966
5967   if (interior_focus)
5968     focus_edge_width = 0;
5969   else
5970     focus_edge_width = 1;
5971
5972   if (window_x)
5973     {
5974       *window_x = buffer_x - text_view->xoffset + focus_edge_width;
5975       if (text_view->left_window)
5976         *window_x += text_view->left_window->allocation.width;
5977     }
5978
5979   if (window_y)
5980     {
5981       *window_y = buffer_y - text_view->yoffset + focus_edge_width;
5982       if (text_view->top_window)
5983         *window_y += text_view->top_window->allocation.height;
5984     }
5985 }
5986
5987 static void
5988 widget_to_text_window (GtkTextWindow *win,
5989                        gint           widget_x,
5990                        gint           widget_y,
5991                        gint          *window_x,
5992                        gint          *window_y)
5993 {
5994   if (window_x)
5995     *window_x = widget_x - win->allocation.x;
5996
5997   if (window_y)
5998     *window_y = widget_y - win->allocation.y;
5999 }
6000
6001 static void
6002 buffer_to_text_window (GtkTextView   *text_view,
6003                        GtkTextWindow *win,
6004                        gint           buffer_x,
6005                        gint           buffer_y,
6006                        gint          *window_x,
6007                        gint          *window_y)
6008 {
6009   if (win == NULL)
6010     {
6011       g_warning ("Attempt to convert text buffer coordinates to coordinates "
6012                  "for a nonexistent or private child window of GtkTextView");
6013       return;
6014     }
6015
6016   buffer_to_widget (text_view,
6017                     buffer_x, buffer_y,
6018                     window_x, window_y);
6019
6020   widget_to_text_window (win,
6021                          window_x ? *window_x : 0,
6022                          window_y ? *window_y : 0,
6023                          window_x,
6024                          window_y);
6025 }
6026
6027 /**
6028  * gtk_text_view_buffer_to_window_coords:
6029  * @text_view: a #GtkTextView
6030  * @win: a #GtkTextWindowType
6031  * @buffer_x: buffer x coordinate
6032  * @buffer_y: buffer y coordinate
6033  * @window_x: window x coordinate return location
6034  * @window_y: window y coordinate return location
6035  *
6036  * Converts coordinate (@buffer_x, @buffer_y) to coordinates for the window
6037  * @win, and stores the result in (@window_x, @window_y).
6038  **/
6039 void
6040 gtk_text_view_buffer_to_window_coords (GtkTextView      *text_view,
6041                                        GtkTextWindowType win,
6042                                        gint              buffer_x,
6043                                        gint              buffer_y,
6044                                        gint             *window_x,
6045                                        gint             *window_y)
6046 {
6047   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6048
6049   switch (win)
6050     {
6051     case GTK_TEXT_WINDOW_WIDGET:
6052       buffer_to_widget (text_view,
6053                         buffer_x, buffer_y,
6054                         window_x, window_y);
6055       break;
6056
6057     case GTK_TEXT_WINDOW_TEXT:
6058       if (window_x)
6059         *window_x = buffer_x - text_view->xoffset;
6060       if (window_y)
6061         *window_y = buffer_y - text_view->yoffset;
6062       break;
6063
6064     case GTK_TEXT_WINDOW_LEFT:
6065       buffer_to_text_window (text_view,
6066                              text_view->left_window,
6067                              buffer_x, buffer_y,
6068                              window_x, window_y);
6069       break;
6070
6071     case GTK_TEXT_WINDOW_RIGHT:
6072       buffer_to_text_window (text_view,
6073                              text_view->right_window,
6074                              buffer_x, buffer_y,
6075                              window_x, window_y);
6076       break;
6077
6078     case GTK_TEXT_WINDOW_TOP:
6079       buffer_to_text_window (text_view,
6080                              text_view->top_window,
6081                              buffer_x, buffer_y,
6082                              window_x, window_y);
6083       break;
6084
6085     case GTK_TEXT_WINDOW_BOTTOM:
6086       buffer_to_text_window (text_view,
6087                              text_view->bottom_window,
6088                              buffer_x, buffer_y,
6089                              window_x, window_y);
6090       break;
6091
6092     case GTK_TEXT_WINDOW_PRIVATE:
6093       g_warning ("%s: can't get coords for private windows", G_STRLOC);
6094       break;
6095
6096     default:
6097       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
6098       break;
6099     }
6100 }
6101
6102 static void
6103 widget_to_buffer (GtkTextView *text_view,
6104                   gint         widget_x,
6105                   gint         widget_y,
6106                   gint        *buffer_x,
6107                   gint        *buffer_y)
6108 {
6109   gint focus_edge_width;
6110   gboolean interior_focus;
6111
6112   gtk_widget_style_get (GTK_WIDGET (text_view), "interior_focus", &interior_focus, NULL);
6113
6114   if (interior_focus)
6115     focus_edge_width = 0;
6116   else
6117     focus_edge_width = 1;
6118
6119   if (buffer_x)
6120     {
6121       *buffer_x = widget_x - focus_edge_width + text_view->xoffset;
6122       if (text_view->left_window)
6123         *buffer_x -= text_view->left_window->allocation.width;
6124     }
6125
6126   if (buffer_y)
6127     {
6128       *buffer_y = widget_y - focus_edge_width + text_view->yoffset;
6129       if (text_view->top_window)
6130         *buffer_y -= text_view->top_window->allocation.height;
6131     }
6132 }
6133
6134 static void
6135 text_window_to_widget (GtkTextWindow *win,
6136                        gint           window_x,
6137                        gint           window_y,
6138                        gint          *widget_x,
6139                        gint          *widget_y)
6140 {
6141   if (widget_x)
6142     *widget_x = window_x + win->allocation.x;
6143
6144   if (widget_y)
6145     *widget_y = window_y + win->allocation.y;
6146 }
6147
6148 static void
6149 text_window_to_buffer (GtkTextView   *text_view,
6150                        GtkTextWindow *win,
6151                        gint           window_x,
6152                        gint           window_y,
6153                        gint          *buffer_x,
6154                        gint          *buffer_y)
6155 {
6156   if (win == NULL)
6157     {
6158       g_warning ("Attempt to convert GtkTextView buffer coordinates into "
6159                  "coordinates for a nonexistent child window.");
6160       return;
6161     }
6162
6163   text_window_to_widget (win,
6164                          window_x,
6165                          window_y,
6166                          buffer_x,
6167                          buffer_y);
6168
6169   widget_to_buffer (text_view,
6170                     buffer_x ? *buffer_x : 0,
6171                     buffer_y ? *buffer_y : 0,
6172                     buffer_x,
6173                     buffer_y);
6174 }
6175
6176 /**
6177  * gtk_text_view_window_to_buffer_coords:
6178  * @text_view: a #GtkTextView
6179  * @win: a #GtkTextWindowType
6180  * @window_x: window x coordinate
6181  * @window_y: window y coordinate
6182  * @buffer_x: buffer x coordinate return location
6183  * @buffer_y: buffer y coordinate return location
6184  *
6185  * Converts coordinates on the window identified by @win to buffer
6186  * coordinates, storing the result in (@buffer_x,@buffer_y).
6187  **/
6188 void
6189 gtk_text_view_window_to_buffer_coords (GtkTextView      *text_view,
6190                                        GtkTextWindowType win,
6191                                        gint              window_x,
6192                                        gint              window_y,
6193                                        gint             *buffer_x,
6194                                        gint             *buffer_y)
6195 {
6196   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6197
6198   switch (win)
6199     {
6200     case GTK_TEXT_WINDOW_WIDGET:
6201       widget_to_buffer (text_view,
6202                         window_x, window_y,
6203                         buffer_x, buffer_y);
6204       break;
6205
6206     case GTK_TEXT_WINDOW_TEXT:
6207       if (buffer_x)
6208         *buffer_x = window_x + text_view->xoffset;
6209       if (buffer_y)
6210         *buffer_y = window_y + text_view->yoffset;
6211       break;
6212
6213     case GTK_TEXT_WINDOW_LEFT:
6214       text_window_to_buffer (text_view,
6215                              text_view->left_window,
6216                              window_x, window_y,
6217                              buffer_x, buffer_y);
6218       break;
6219
6220     case GTK_TEXT_WINDOW_RIGHT:
6221       text_window_to_buffer (text_view,
6222                              text_view->right_window,
6223                              window_x, window_y,
6224                              buffer_x, buffer_y);
6225       break;
6226
6227     case GTK_TEXT_WINDOW_TOP:
6228       text_window_to_buffer (text_view,
6229                              text_view->top_window,
6230                              window_x, window_y,
6231                              buffer_x, buffer_y);
6232       break;
6233
6234     case GTK_TEXT_WINDOW_BOTTOM:
6235       text_window_to_buffer (text_view,
6236                              text_view->bottom_window,
6237                              window_x, window_y,
6238                              buffer_x, buffer_y);
6239       break;
6240
6241     case GTK_TEXT_WINDOW_PRIVATE:
6242       g_warning ("%s: can't get coords for private windows", G_STRLOC);
6243       break;
6244
6245     default:
6246       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
6247       break;
6248     }
6249 }
6250
6251 static void
6252 set_window_width (GtkTextView      *text_view,
6253                   gint              width,
6254                   GtkTextWindowType type,
6255                   GtkTextWindow   **winp)
6256 {
6257   if (width == 0)
6258     {
6259       if (*winp)
6260         {
6261           text_window_free (*winp);
6262           *winp = NULL;
6263           gtk_widget_queue_resize (GTK_WIDGET (text_view));
6264         }
6265     }
6266   else
6267     {
6268       if (*winp == NULL)
6269         {
6270           *winp = text_window_new (type,
6271                                    GTK_WIDGET (text_view),
6272                                    width, 0);
6273           /* if the widget is already realized we need to realize the child manually */
6274           if (GTK_WIDGET_REALIZED (text_view))
6275             text_window_realize (*winp, GTK_WIDGET (text_view)->window);
6276         }
6277       else
6278         {
6279           if ((*winp)->requisition.width == width)
6280             return;
6281         }
6282
6283       gtk_widget_queue_resize (GTK_WIDGET (text_view));
6284     }
6285 }
6286
6287
6288 static void
6289 set_window_height (GtkTextView      *text_view,
6290                    gint              height,
6291                    GtkTextWindowType type,
6292                    GtkTextWindow   **winp)
6293 {
6294   if (height == 0)
6295     {
6296       if (*winp)
6297         {
6298           text_window_free (*winp);
6299           *winp = NULL;
6300           gtk_widget_queue_resize (GTK_WIDGET (text_view));
6301         }
6302     }
6303   else
6304     {
6305       if (*winp == NULL)
6306         {
6307           *winp = text_window_new (type,
6308                                    GTK_WIDGET (text_view),
6309                                    0, height);
6310
6311           /* if the widget is already realized we need to realize the child manually */
6312           if (GTK_WIDGET_REALIZED (text_view))
6313             text_window_realize (*winp, GTK_WIDGET (text_view)->window);
6314         }
6315       else
6316         {
6317           if ((*winp)->requisition.height == height)
6318             return;
6319         }
6320
6321       gtk_widget_queue_resize (GTK_WIDGET (text_view));
6322     }
6323 }
6324
6325 /**
6326  * gtk_text_view_set_border_window_size:
6327  * @text_view: a #GtkTextView
6328  * @type: window to affect
6329  * @size: width or height of the window
6330  *
6331  * Sets the width of %GTK_TEXT_WINDOW_LEFT or %GTK_TEXT_WINDOW_RIGHT,
6332  * or the height of %GTK_TEXT_WINDOW_TOP or %GTK_TEXT_WINDOW_BOTTOM.
6333  * Automatically destroys the corresponding window if the size is set
6334  * to 0, and creates the window if the size is set to non-zero.  This
6335  * function can only be used for the "border windows," it doesn't work
6336  * with #GTK_TEXT_WINDOW_WIDGET, #GTK_TEXT_WINDOW_TEXT, or
6337  * #GTK_TEXT_WINDOW_PRIVATE.
6338  **/
6339 void
6340 gtk_text_view_set_border_window_size (GtkTextView      *text_view,
6341                                       GtkTextWindowType type,
6342                                       gint              size)
6343
6344 {
6345   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6346   g_return_if_fail (size >= 0);
6347
6348   switch (type)
6349     {
6350     case GTK_TEXT_WINDOW_LEFT:
6351       set_window_width (text_view, size, GTK_TEXT_WINDOW_LEFT,
6352                         &text_view->left_window);
6353       break;
6354
6355     case GTK_TEXT_WINDOW_RIGHT:
6356       set_window_width (text_view, size, GTK_TEXT_WINDOW_RIGHT,
6357                         &text_view->right_window);
6358       break;
6359
6360     case GTK_TEXT_WINDOW_TOP:
6361       set_window_height (text_view, size, GTK_TEXT_WINDOW_TOP,
6362                          &text_view->top_window);
6363       break;
6364
6365     case GTK_TEXT_WINDOW_BOTTOM:
6366       set_window_height (text_view, size, GTK_TEXT_WINDOW_BOTTOM,
6367                          &text_view->bottom_window);
6368       break;
6369
6370     default:
6371       g_warning ("Can only set size of left/right/top/bottom border windows with gtk_text_view_set_border_window_size()");
6372       break;
6373     }
6374 }
6375
6376 /**
6377  * gtk_text_view_get_border_window_size:
6378  * @text_view: a #GtkTextView
6379  * @type: window to return size from
6380  *
6381  * Gets the width of the specified border window. See
6382  * gtk_text_view_set_border_window_size().
6383  *
6384  * Return value: width of window
6385  **/
6386 gint
6387 gtk_text_view_get_border_window_size (GtkTextView       *text_view,
6388                                       GtkTextWindowType  type)
6389 {
6390   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
6391
6392   switch (type)
6393     {
6394     case GTK_TEXT_WINDOW_LEFT:
6395       if (text_view->left_window)
6396         return text_view->left_window->requisition.width;
6397
6398     case GTK_TEXT_WINDOW_RIGHT:
6399       if (text_view->right_window)
6400         return text_view->right_window->requisition.width;
6401
6402     case GTK_TEXT_WINDOW_TOP:
6403       if (text_view->top_window)
6404         return text_view->top_window->requisition.height;
6405
6406     case GTK_TEXT_WINDOW_BOTTOM:
6407       if (text_view->bottom_window)
6408         return text_view->bottom_window->requisition.height;
6409
6410     default:
6411       g_warning ("Can only get size of left/right/top/bottom border windows with gtk_text_view_get_border_window_size()");
6412       break;
6413     }
6414
6415   return 0;
6416 }
6417
6418 /*
6419  * Child widgets
6420  */
6421
6422 static GtkTextViewChild*
6423 text_view_child_new_anchored (GtkWidget          *child,
6424                               GtkTextChildAnchor *anchor,
6425                               GtkTextLayout      *layout)
6426 {
6427   GtkTextViewChild *vc;
6428
6429   vc = g_new (GtkTextViewChild, 1);
6430
6431   vc->widget = child;
6432   vc->anchor = anchor;
6433
6434   vc->from_top_of_line = 0;
6435   vc->from_left_of_buffer = 0;
6436
6437   g_object_ref (G_OBJECT (vc->widget));
6438   g_object_ref (G_OBJECT (vc->anchor));
6439
6440   g_object_set_data (G_OBJECT (child),
6441                      "gtk-text-view-child",
6442                      vc);
6443
6444   gtk_text_child_anchor_register_child (anchor, child, layout);
6445
6446   return vc;
6447 }
6448
6449 static GtkTextViewChild*
6450 text_view_child_new_window (GtkWidget          *child,
6451                             GtkTextWindowType   type,
6452                             gint                x,
6453                             gint                y)
6454 {
6455   GtkTextViewChild *vc;
6456
6457   vc = g_new (GtkTextViewChild, 1);
6458
6459   vc->widget = child;
6460   vc->anchor = NULL;
6461
6462   vc->from_top_of_line = 0;
6463   vc->from_left_of_buffer = 0;
6464
6465   g_object_ref (G_OBJECT (vc->widget));
6466
6467   vc->type = type;
6468   vc->x = x;
6469   vc->y = y;
6470
6471   return vc;
6472 }
6473
6474 static void
6475 text_view_child_free (GtkTextViewChild *child)
6476 {
6477   g_object_set_data (G_OBJECT (child->widget),
6478                      "gtk-text-view-child", NULL);
6479
6480   if (child->anchor)
6481     {
6482       gtk_text_child_anchor_unregister_child (child->anchor,
6483                                               child->widget);
6484       g_object_unref (G_OBJECT (child->anchor));
6485     }
6486
6487   g_object_unref (G_OBJECT (child->widget));
6488
6489   g_free (child);
6490 }
6491
6492 static void
6493 text_view_child_set_parent_window (GtkTextView      *text_view,
6494                                    GtkTextViewChild *vc)
6495 {
6496   if (vc->anchor)
6497     gtk_widget_set_parent_window (vc->widget,
6498                                   text_view->text_window->bin_window);
6499   else
6500     {
6501       GdkWindow *window;
6502       window = gtk_text_view_get_window (text_view,
6503                                          vc->type);
6504       gtk_widget_set_parent_window (vc->widget, window);
6505     }
6506 }
6507
6508 static void
6509 add_child (GtkTextView      *text_view,
6510            GtkTextViewChild *vc)
6511 {
6512   text_view->children = g_slist_prepend (text_view->children,
6513                                          vc);
6514
6515   if (GTK_WIDGET_REALIZED (text_view))
6516     text_view_child_set_parent_window (text_view, vc);
6517
6518   gtk_widget_set_parent (vc->widget, GTK_WIDGET (text_view));
6519 }
6520
6521 void
6522 gtk_text_view_add_child_at_anchor (GtkTextView          *text_view,
6523                                    GtkWidget            *child,
6524                                    GtkTextChildAnchor   *anchor)
6525 {
6526   GtkTextViewChild *vc;
6527
6528   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6529   g_return_if_fail (GTK_IS_WIDGET (child));
6530   g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
6531   g_return_if_fail (child->parent == NULL);
6532
6533   gtk_text_view_ensure_layout (text_view);
6534
6535   vc = text_view_child_new_anchored (child, anchor,
6536                                      text_view->layout);
6537
6538   add_child (text_view, vc);
6539 }
6540
6541 void
6542 gtk_text_view_add_child_in_window (GtkTextView          *text_view,
6543                                    GtkWidget            *child,
6544                                    GtkTextWindowType     which_window,
6545                                    gint                  xpos,
6546                                    gint                  ypos)
6547 {
6548   GtkTextViewChild *vc;
6549
6550   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6551   g_return_if_fail (GTK_IS_WIDGET (child));
6552   g_return_if_fail (xpos >= 0);
6553   g_return_if_fail (ypos >= 0);
6554   g_return_if_fail (child->parent == NULL);
6555
6556   vc = text_view_child_new_window (child, which_window,
6557                                    xpos, ypos);
6558
6559   add_child (text_view, vc);
6560 }
6561
6562 void
6563 gtk_text_view_move_child          (GtkTextView          *text_view,
6564                                    GtkWidget            *child,
6565                                    gint                  xpos,
6566                                    gint                  ypos)
6567 {
6568   GtkTextViewChild *vc;
6569
6570   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
6571   g_return_if_fail (GTK_IS_WIDGET (child));
6572   g_return_if_fail (xpos >= 0);
6573   g_return_if_fail (ypos >= 0);
6574   g_return_if_fail (child->parent == (GtkWidget*) text_view);
6575
6576   vc = g_object_get_data (G_OBJECT (child),
6577                           "gtk-text-view-child");
6578
6579   g_assert (vc != NULL);
6580
6581   vc->x = xpos;
6582   vc->y = ypos;
6583
6584   if (GTK_WIDGET_VISIBLE (child) && GTK_WIDGET_VISIBLE (text_view))
6585     gtk_widget_queue_resize (child);
6586 }
6587
6588
6589
6590 /* Iterator operations */
6591
6592 gboolean
6593 gtk_text_view_forward_display_line (GtkTextView *text_view,
6594                                     GtkTextIter *iter)
6595 {
6596   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6597   g_return_val_if_fail (iter != NULL, FALSE);
6598
6599   gtk_text_view_ensure_layout (text_view);
6600
6601   return gtk_text_layout_move_iter_to_next_line (text_view->layout, iter);
6602 }
6603
6604 gboolean
6605 gtk_text_view_backward_display_line (GtkTextView *text_view,
6606                                      GtkTextIter *iter)
6607 {
6608   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6609   g_return_val_if_fail (iter != NULL, FALSE);
6610
6611   gtk_text_view_ensure_layout (text_view);
6612
6613   return gtk_text_layout_move_iter_to_previous_line (text_view->layout, iter);
6614 }
6615
6616 gboolean
6617 gtk_text_view_forward_display_line_end (GtkTextView *text_view,
6618                                         GtkTextIter *iter)
6619 {
6620   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6621   g_return_val_if_fail (iter != NULL, FALSE);
6622
6623   gtk_text_view_ensure_layout (text_view);
6624
6625   return gtk_text_layout_move_iter_to_line_end (text_view->layout, iter, 1);
6626 }
6627
6628 gboolean
6629 gtk_text_view_backward_display_line_start (GtkTextView *text_view,
6630                                            GtkTextIter *iter)
6631 {
6632   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6633   g_return_val_if_fail (iter != NULL, FALSE);
6634
6635   gtk_text_view_ensure_layout (text_view);
6636
6637   return gtk_text_layout_move_iter_to_line_end (text_view->layout, iter, -1);
6638 }
6639
6640 gboolean
6641 gtk_text_view_starts_display_line (GtkTextView       *text_view,
6642                                    const GtkTextIter *iter)
6643 {
6644   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6645   g_return_val_if_fail (iter != NULL, FALSE);
6646
6647   gtk_text_view_ensure_layout (text_view);
6648
6649   return gtk_text_layout_iter_starts_line (text_view->layout, iter);
6650 }
6651
6652 gboolean
6653 gtk_text_view_move_visually (GtkTextView *text_view,
6654                              GtkTextIter *iter,
6655                              gint         count)
6656 {
6657   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6658   g_return_val_if_fail (iter != NULL, FALSE);
6659
6660   gtk_text_view_ensure_layout (text_view);
6661
6662   return gtk_text_layout_move_iter_visually (text_view->layout, iter, count);
6663 }