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