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