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 "gtksignal.h"
  37 #include "gtktextdisplay.h"
  38 #include "gtktextview.h"
  39 #include "gtkimmulticontext.h"
  40 #include "gdk/gdkkeysyms.h"
  41 #include <string.h>
  42
  43 /* How scrolling, validation, exposes, etc. work.
  44  *
  45  * The expose_event handler has the invariant that the onscreen lines
  46  * have been validated.
  47  *
  48  * There are two ways that onscreen lines can become invalid. The first
  49  * is to change which lines are onscreen. This happens when the value
  50  * of a scroll adjustment changes. So the code path begins in
  51  * gtk_text_view_value_changed() and goes like this:
  52  *   - gdk_window_scroll() to reflect the new adjustment value
  53  *   - validate the lines that were moved onscreen
  54  *   - gdk_window_process_updates() to handle the exposes immediately
  55  *
  56  * The second way is that you get the "invalidated" signal from the layout,
  57  * indicating that lines have become invalid. This code path begins in
  58  * invalidated_handler() and goes like this:
  59  *   - install high-priority idle which does the rest of the steps
  60  *   - if a scroll is pending from scroll_to_mark(), do the scroll,
  61  *     jumping to the gtk_text_view_value_changed() code path
  62  *   - otherwise, validate the onscreen lines
  63  *   - DO NOT process updates
  64  *
  65  * In both cases, validating the onscreen lines can trigger a scroll
  66  * due to maintaining the first_para on the top of the screen.
  67  * If validation triggers a scroll, we jump to the top of the code path
  68  * for value_changed, and bail out of the current code path.
  69  *
  70  * Also, in size_allocate, if we invalidate some lines from changing
  71  * the layout width, we need to go ahead and run the high-priority idle,
  72  * because GTK sends exposes right after doing the size allocates without
  73  * returning to the main loop. This is also why the high-priority idle
  74  * is at a higher priority than resizing.
  75  *
  76  */
  77
  78 #define FOCUS_EDGE_WIDTH 1
  79
  80 #define SCREEN_WIDTH(widget) text_window_get_width (GTK_TEXT_VIEW (widget)->text_window)
  81 #define SCREEN_HEIGHT(widget) text_window_get_height (GTK_TEXT_VIEW (widget)->text_window)
  82
  83 /* #define DEBUG_VALIDATION_AND_SCROLLING */
  84
  85 #ifdef DEBUG_VALIDATION_AND_SCROLLING
  86 #define DV(x) (x)
  87 #else
  88 #define DV(x)
  89 #endif
  90
  91 struct _GtkTextPendingScroll
  92 {
  93   GtkTextMark   *mark;
  94   gdouble        within_margin;
  95   gboolean       use_align;
  96   gdouble        xalign;
  97   gdouble        yalign;
  98 };
  99
 100 enum
 101 {
 102   SET_SCROLL_ADJUSTMENTS,
 103   POPULATE_POPUP,
 104   MOVE_CURSOR,
 105   SET_ANCHOR,
 106   INSERT_AT_CURSOR,
 107   DELETE_FROM_CURSOR,
 108   CUT_CLIPBOARD,
 109   COPY_CLIPBOARD,
 110   PASTE_CLIPBOARD,
 111   TOGGLE_OVERWRITE,
 112   LAST_SIGNAL
 113 };
 114
 115 enum
 116 {
 117   ARG_0,
 118   ARG_HEIGHT_LINES,
 119   ARG_WIDTH_COLUMNS,
 120   ARG_PIXELS_ABOVE_LINES,
 121   ARG_PIXELS_BELOW_LINES,
 122   ARG_PIXELS_INSIDE_WRAP,
 123   ARG_EDITABLE,
 124   ARG_WRAP_MODE,
 125   ARG_JUSTIFY,
 126   ARG_LEFT_MARGIN,
 127   ARG_RIGHT_MARGIN,
 128   ARG_INDENT,
 129   ARG_TABS,
 130   LAST_ARG
 131 };
 132
 133 static void gtk_text_view_init                 (GtkTextView      *text_view);
 134 static void gtk_text_view_class_init           (GtkTextViewClass *klass);
 135 static void gtk_text_view_destroy              (GtkObject        *object);
 136 static void gtk_text_view_finalize             (GObject          *object);
 137 static void gtk_text_view_set_arg              (GtkObject        *object,
 138                                                 GtkArg           *arg,
 139                                                 guint             arg_id);
 140 static void gtk_text_view_get_arg              (GtkObject        *object,
 141                                                 GtkArg           *arg,
 142                                                 guint             arg_id);
 143 static void gtk_text_view_size_request         (GtkWidget        *widget,
 144                                                 GtkRequisition   *requisition);
 145 static void gtk_text_view_size_allocate        (GtkWidget        *widget,
 146                                                 GtkAllocation    *allocation);
 147 static void gtk_text_view_realize              (GtkWidget        *widget);
 148 static void gtk_text_view_unrealize            (GtkWidget        *widget);
 149 static void gtk_text_view_style_set            (GtkWidget        *widget,
 150                                                 GtkStyle         *previous_style);
 151 static void gtk_text_view_direction_changed    (GtkWidget        *widget,
 152                                                 GtkTextDirection  previous_direction);
 153 static gint gtk_text_view_event                (GtkWidget        *widget,
 154                                                 GdkEvent         *event);
 155 static gint gtk_text_view_key_press_event      (GtkWidget        *widget,
 156                                                 GdkEventKey      *event);
 157 static gint gtk_text_view_key_release_event    (GtkWidget        *widget,
 158                                                 GdkEventKey      *event);
 159 static gint gtk_text_view_button_press_event   (GtkWidget        *widget,
 160                                                 GdkEventButton   *event);
 161 static gint gtk_text_view_button_release_event (GtkWidget        *widget,
 162                                                 GdkEventButton   *event);
 163 static gint gtk_text_view_focus_in_event       (GtkWidget        *widget,
 164                                                 GdkEventFocus    *event);
 165 static gint gtk_text_view_focus_out_event      (GtkWidget        *widget,
 166                                                 GdkEventFocus    *event);
 167 static gint gtk_text_view_motion_event         (GtkWidget        *widget,
 168                                                 GdkEventMotion   *event);
 169 static gint gtk_text_view_expose_event         (GtkWidget        *widget,
 170                                                 GdkEventExpose   *expose);
 171 static void gtk_text_view_draw_focus           (GtkWidget        *widget);
 172
 173 /* Source side drag signals */
 174 static void gtk_text_view_drag_begin       (GtkWidget        *widget,
 175                                             GdkDragContext   *context);
 176 static void gtk_text_view_drag_end         (GtkWidget        *widget,
 177                                             GdkDragContext   *context);
 178 static void gtk_text_view_drag_data_get    (GtkWidget        *widget,
 179                                             GdkDragContext   *context,
 180                                             GtkSelectionData *selection_data,
 181                                             guint             info,
 182                                             guint             time);
 183 static void gtk_text_view_drag_data_delete (GtkWidget        *widget,
 184                                             GdkDragContext   *context);
 185
 186 /* Target side drag signals */
 187 static void     gtk_text_view_drag_leave         (GtkWidget        *widget,
 188                                                   GdkDragContext   *context,
 189                                                   guint             time);
 190 static gboolean gtk_text_view_drag_motion        (GtkWidget        *widget,
 191                                                   GdkDragContext   *context,
 192                                                   gint              x,
 193                                                   gint              y,
 194                                                   guint             time);
 195 static gboolean gtk_text_view_drag_drop          (GtkWidget        *widget,
 196                                                   GdkDragContext   *context,
 197                                                   gint              x,
 198                                                   gint              y,
 199                                                   guint             time);
 200 static void     gtk_text_view_drag_data_received (GtkWidget        *widget,
 201                                                   GdkDragContext   *context,
 202                                                   gint              x,
 203                                                   gint              y,
 204                                                   GtkSelectionData *selection_data,
 205                                                   guint             info,
 206                                                   guint             time);
 207
 208 static void gtk_text_view_set_scroll_adjustments (GtkTextView   *text_view,
 209                                                   GtkAdjustment *hadj,
 210                                                   GtkAdjustment *vadj);
 211 static void gtk_text_view_popup_menu             (GtkWidget     *widget);
 212
 213 static void gtk_text_view_move_cursor      (GtkTextView           *text_view,
 214                                             GtkMovementStep        step,
 215                                             gint                   count,
 216                                             gboolean               extend_selection);
 217 static void gtk_text_view_set_anchor       (GtkTextView           *text_view);
 218 static void gtk_text_view_scroll_pages     (GtkTextView           *text_view,
 219                                             gint                   count);
 220 static void gtk_text_view_insert_at_cursor (GtkTextView           *text_view,
 221                                             const gchar           *str);
 222 static void gtk_text_view_delete_from_cursor (GtkTextView           *text_view,
 223                                               GtkDeleteType          type,
 224                                               gint                   count);
 225 static void gtk_text_view_cut_clipboard    (GtkTextView           *text_view);
 226 static void gtk_text_view_copy_clipboard   (GtkTextView           *text_view);
 227 static void gtk_text_view_paste_clipboard  (GtkTextView           *text_view);
 228 static void gtk_text_view_toggle_overwrite (GtkTextView           *text_view);
 229 static void gtk_text_view_unselect         (GtkTextView           *text_view);
 230
 231 static void     gtk_text_view_validate_onscreen     (GtkTextView        *text_view);
 232 static void     gtk_text_view_get_first_para_iter   (GtkTextView        *text_view,
 233                                                      GtkTextIter        *iter);
 234 static void     gtk_text_view_update_layout_width       (GtkTextView        *text_view);
 235 static void     gtk_text_view_set_attributes_from_style (GtkTextView        *text_view,
 236                                                          GtkTextAttributes *values,
 237                                                          GtkStyle           *style);
 238 static void     gtk_text_view_ensure_layout         (GtkTextView        *text_view);
 239 static void     gtk_text_view_destroy_layout        (GtkTextView        *text_view);
 240 static void     gtk_text_view_reset_im_context      (GtkTextView        *text_view);
 241 static void     gtk_text_view_start_selection_drag  (GtkTextView        *text_view,
 242                                                      const GtkTextIter  *iter,
 243                                                      GdkEventButton     *event);
 244 static gboolean gtk_text_view_end_selection_drag    (GtkTextView        *text_view,
 245                                                      GdkEventButton     *event);
 246 static void     gtk_text_view_start_selection_dnd   (GtkTextView        *text_view,
 247                                                      const GtkTextIter  *iter,
 248                                                      GdkEventMotion     *event);
 249 static void     gtk_text_view_start_cursor_blink    (GtkTextView        *text_view,
 250                                                      gboolean            with_delay);
 251 static void     gtk_text_view_stop_cursor_blink     (GtkTextView        *text_view);
 252
 253 static void gtk_text_view_value_changed           (GtkAdjustment *adj,
 254                                                    GtkTextView   *view);
 255 static void gtk_text_view_commit_handler          (GtkIMContext  *context,
 256                                                    const gchar   *str,
 257                                                    GtkTextView   *text_view);
 258 static void gtk_text_view_preedit_changed_handler (GtkIMContext  *context,
 259                                                    GtkTextView   *text_view);
 260
 261 static void gtk_text_view_mark_set_handler       (GtkTextBuffer     *buffer,
 262                                                   const GtkTextIter *location,
 263                                                   GtkTextMark       *mark,
 264                                                   gpointer           data);
 265 static void gtk_text_view_get_virtual_cursor_pos (GtkTextView       *text_view,
 266                                                   gint              *x,
 267                                                   gint              *y);
 268 static void gtk_text_view_set_virtual_cursor_pos (GtkTextView       *text_view,
 269                                                   gint               x,
 270                                                   gint               y);
 271
 272 static GtkAdjustment* get_hadjustment            (GtkTextView       *text_view);
 273 static GtkAdjustment* get_vadjustment            (GtkTextView       *text_view);
 274
 275 static void gtk_text_view_do_popup               (GtkTextView       *text_view,
 276                                                   GdkEventButton    *event);
 277
 278 static void gtk_text_view_queue_scroll           (GtkTextView   *text_view,
 279                                                   GtkTextMark   *mark,
 280                                                   gdouble        within_margin,
 281                                                   gboolean       use_align,
 282                                                   gdouble        xalign,
 283                                                   gdouble        yalign);
 284
 285 static gboolean gtk_text_view_flush_scroll       (GtkTextView *text_view);
 286
 287 /* Container methods */
 288 static void gtk_text_view_add    (GtkContainer *container,
 289                                   GtkWidget    *child);
 290 static void gtk_text_view_remove (GtkContainer *container,
 291                                   GtkWidget    *child);
 292 static void gtk_text_view_forall (GtkContainer *container,
 293                                   gboolean      include_internals,
 294                                   GtkCallback   callback,
 295                                   gpointer      callback_data);
 296
 297 /* FIXME probably need the focus methods. */
 298
 299 /* Hack-around */
 300 #define g_signal_handlers_disconnect_by_func(obj, func, data) g_signal_handlers_disconnect_matched (obj, G_SIGNAL_MATCH_FUNC | G_SIGNAL_MATCH_DATA, 0, 0, NULL, func, data)
 301
 302 typedef struct _GtkTextViewChild GtkTextViewChild;
 303
 304 struct _GtkTextViewChild
 305 {
 306   GtkWidget *widget;
 307
 308   GtkTextChildAnchor *anchor;
 309
 310   gint from_top_of_line;
 311   gint from_left_of_buffer;
 312
 313   /* These are ignored if anchor != NULL */
 314   GtkTextWindowType type;
 315   gint x;
 316   gint y;
 317 };
 318
 319 static GtkTextViewChild* text_view_child_new_anchored (GtkWidget          *child,
 320                                                        GtkTextChildAnchor *anchor,
 321                                                        GtkTextLayout      *layout);
 322 static GtkTextViewChild* text_view_child_new_window   (GtkWidget          *child,
 323                                                        GtkTextWindowType   type,
 324                                                        gint                x,
 325                                                        gint                y);
 326 static void              text_view_child_free         (GtkTextViewChild   *child);
 327
 328 static void              text_view_child_realize      (GtkTextView      *text_view,
 329                                                        GtkTextViewChild *child);
 330
 331 struct _GtkTextWindow
 332 {
 333   GtkTextWindowType type;
 334   GtkWidget *widget;
 335   GdkWindow *window;
 336   GdkWindow *bin_window;
 337   GtkRequisition requisition;
 338   GdkRectangle allocation;
 339 };
 340
 341 static GtkTextWindow *text_window_new             (GtkTextWindowType  type,
 342                                                    GtkWidget         *widget,
 343                                                    gint               width_request,
 344                                                    gint               height_request);
 345 static void           text_window_free            (GtkTextWindow     *win);
 346 static void           text_window_realize         (GtkTextWindow     *win,
 347                                                    GdkWindow         *parent);
 348 static void           text_window_unrealize       (GtkTextWindow     *win);
 349 static void           text_window_size_allocate   (GtkTextWindow     *win,
 350                                                    GdkRectangle      *rect);
 351 static void           text_window_scroll          (GtkTextWindow     *win,
 352                                                    gint               dx,
 353                                                    gint               dy);
 354 static void           text_window_invalidate_rect (GtkTextWindow     *win,
 355                                                    GdkRectangle      *rect);
 356
 357 static gint           text_window_get_width       (GtkTextWindow     *win);
 358 static gint           text_window_get_height      (GtkTextWindow     *win);
 359 static void           text_window_get_allocation  (GtkTextWindow     *win,
 360                                                    GdkRectangle      *rect);
 361
 362
 363 enum
 364 {
 365   TARGET_STRING,
 366   TARGET_TEXT,
 367   TARGET_COMPOUND_TEXT,
 368   TARGET_UTF8_STRING,
 369   TARGET_TEXT_BUFFER_CONTENTS
 370 };
 371
 372 static GtkTargetEntry target_table[] = {
 373   { "GTK_TEXT_BUFFER_CONTENTS", GTK_TARGET_SAME_APP,
 374     TARGET_TEXT_BUFFER_CONTENTS },
 375   { "UTF8_STRING", 0, TARGET_UTF8_STRING },
 376   { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
 377   { "TEXT", 0, TARGET_TEXT },
 378   { "text/plain", 0, TARGET_STRING },
 379   { "STRING",     0, TARGET_STRING }
 380 };
 381
 382 static GtkContainerClass *parent_class = NULL;
 383 static guint signals[LAST_SIGNAL] = { 0 };
 384
 385 GtkType
 386 gtk_text_view_get_type (void)
 387 {
 388   static GtkType our_type = 0;
 389
 390   if (our_type == 0)
 391     {
 392       static const GtkTypeInfo our_info =
 393       {
 394         "GtkTextView",
 395         sizeof (GtkTextView),
 396         sizeof (GtkTextViewClass),
 397         (GtkClassInitFunc) gtk_text_view_class_init,
 398         (GtkObjectInitFunc) gtk_text_view_init,
 399         /* reserved_1 */ NULL,
 400         /* reserved_2 */ NULL,
 401         (GtkClassInitFunc) NULL
 402       };
 403
 404       our_type = gtk_type_unique (GTK_TYPE_CONTAINER, &our_info);
 405     }
 406
 407   return our_type;
 408 }
 409
 410 static void
 411 add_move_binding (GtkBindingSet  *binding_set,
 412                   guint           keyval,
 413                   guint           modmask,
 414                   GtkMovementStep step,
 415                   gint            count)
 416 {
 417   g_return_if_fail ((modmask & GDK_SHIFT_MASK) == 0);
 418
 419   gtk_binding_entry_add_signal (binding_set, keyval, modmask,
 420                                 "move_cursor", 3,
 421                                 GTK_TYPE_ENUM, step,
 422                                 GTK_TYPE_INT, count,
 423                                 GTK_TYPE_BOOL, FALSE);
 424
 425   /* Selection-extending version */
 426   gtk_binding_entry_add_signal (binding_set, keyval, modmask | GDK_SHIFT_MASK,
 427                                 "move_cursor", 3,
 428                                 GTK_TYPE_ENUM, step,
 429                                 GTK_TYPE_INT, count,
 430                                 GTK_TYPE_BOOL, TRUE);
 431 }
 432
 433 static void
 434 gtk_text_view_class_init (GtkTextViewClass *klass)
 435 {
 436   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 437   GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass);
 438   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 439   GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
 440   GtkBindingSet *binding_set;
 441
 442   parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
 443
 444   /* Default handlers and virtual methods
 445    */
 446   object_class->set_arg = gtk_text_view_set_arg;
 447   object_class->get_arg = gtk_text_view_get_arg;
 448
 449   object_class->destroy = gtk_text_view_destroy;
 450   gobject_class->finalize = gtk_text_view_finalize;
 451
 452   widget_class->realize = gtk_text_view_realize;
 453   widget_class->unrealize = gtk_text_view_unrealize;
 454   widget_class->style_set = gtk_text_view_style_set;
 455   widget_class->direction_changed = gtk_text_view_direction_changed;
 456   widget_class->size_request = gtk_text_view_size_request;
 457   widget_class->size_allocate = gtk_text_view_size_allocate;
 458   widget_class->event = gtk_text_view_event;
 459   widget_class->key_press_event = gtk_text_view_key_press_event;
 460   widget_class->key_release_event = gtk_text_view_key_release_event;
 461   widget_class->button_press_event = gtk_text_view_button_press_event;
 462   widget_class->button_release_event = gtk_text_view_button_release_event;
 463   widget_class->focus_in_event = gtk_text_view_focus_in_event;
 464   widget_class->focus_out_event = gtk_text_view_focus_out_event;
 465   widget_class->motion_notify_event = gtk_text_view_motion_event;
 466   widget_class->expose_event = gtk_text_view_expose_event;
 467
 468   widget_class->drag_begin = gtk_text_view_drag_begin;
 469   widget_class->drag_end = gtk_text_view_drag_end;
 470   widget_class->drag_data_get = gtk_text_view_drag_data_get;
 471   widget_class->drag_data_delete = gtk_text_view_drag_data_delete;
 472
 473   widget_class->drag_leave = gtk_text_view_drag_leave;
 474   widget_class->drag_motion = gtk_text_view_drag_motion;
 475   widget_class->drag_drop = gtk_text_view_drag_drop;
 476   widget_class->drag_data_received = gtk_text_view_drag_data_received;
 477
 478   widget_class->popup_menu = gtk_text_view_popup_menu;
 479
 480   container_class->add = gtk_text_view_add;
 481   container_class->remove = gtk_text_view_remove;
 482   container_class->forall = gtk_text_view_forall;
 483
 484   klass->move_cursor = gtk_text_view_move_cursor;
 485   klass->set_anchor = gtk_text_view_set_anchor;
 486   klass->insert_at_cursor = gtk_text_view_insert_at_cursor;
 487   klass->delete_from_cursor = gtk_text_view_delete_from_cursor;
 488   klass->cut_clipboard = gtk_text_view_cut_clipboard;
 489   klass->copy_clipboard = gtk_text_view_copy_clipboard;
 490   klass->paste_clipboard = gtk_text_view_paste_clipboard;
 491   klass->toggle_overwrite = gtk_text_view_toggle_overwrite;
 492   klass->set_scroll_adjustments = gtk_text_view_set_scroll_adjustments;
 493
 494   /*
 495    * Arguments
 496    */
 497   gtk_object_add_arg_type ("GtkTextView::height_lines", GTK_TYPE_INT,
 498                            GTK_ARG_READWRITE, ARG_HEIGHT_LINES);
 499   gtk_object_add_arg_type ("GtkTextView::width_columns", GTK_TYPE_INT,
 500                            GTK_ARG_READWRITE, ARG_WIDTH_COLUMNS);
 501   gtk_object_add_arg_type ("GtkTextView::pixels_above_lines", GTK_TYPE_INT,
 502                            GTK_ARG_READWRITE, ARG_PIXELS_ABOVE_LINES);
 503   gtk_object_add_arg_type ("GtkTextView::pixels_below_lines", GTK_TYPE_INT,
 504                            GTK_ARG_READWRITE, ARG_PIXELS_BELOW_LINES);
 505   gtk_object_add_arg_type ("GtkTextView::pixels_inside_wrap", GTK_TYPE_INT,
 506                            GTK_ARG_READWRITE, ARG_PIXELS_INSIDE_WRAP);
 507   gtk_object_add_arg_type ("GtkTextView::editable", GTK_TYPE_BOOL,
 508                            GTK_ARG_READWRITE, ARG_EDITABLE);
 509   gtk_object_add_arg_type ("GtkTextView::wrap_mode", GTK_TYPE_WRAP_MODE,
 510                            GTK_ARG_READWRITE, ARG_WRAP_MODE);
 511   gtk_object_add_arg_type ("GtkTextView::justify", GTK_TYPE_JUSTIFICATION,
 512                            GTK_ARG_READWRITE, ARG_JUSTIFY);
 513   gtk_object_add_arg_type ("GtkTextView::left_margin", GTK_TYPE_INT,
 514                            GTK_ARG_READWRITE, ARG_LEFT_MARGIN);
 515   gtk_object_add_arg_type ("GtkTextView::right_margin", GTK_TYPE_INT,
 516                            GTK_ARG_READWRITE, ARG_RIGHT_MARGIN);
 517   gtk_object_add_arg_type ("GtkTextView::indent", GTK_TYPE_INT,
 518                            GTK_ARG_READWRITE, ARG_INDENT);
 519   gtk_object_add_arg_type ("GtkTextView::tabs", GTK_TYPE_PANGO_TAB_ARRAY,
 520                            GTK_ARG_READWRITE, ARG_TABS);
 521
 522   /*
 523    * Signals
 524    */
 525
 526   signals[MOVE_CURSOR] =
 527     gtk_signal_new ("move_cursor",
 528                     GTK_RUN_LAST | GTK_RUN_ACTION,
 529                     GTK_CLASS_TYPE (object_class),
 530                     GTK_SIGNAL_OFFSET (GtkTextViewClass, move_cursor),
 531                     gtk_marshal_VOID__ENUM_INT_BOOLEAN,
 532                     GTK_TYPE_NONE, 3, GTK_TYPE_MOVEMENT_STEP, GTK_TYPE_INT, GTK_TYPE_BOOL);
 533
 534   signals[SET_ANCHOR] =
 535     gtk_signal_new ("set_anchor",
 536                     GTK_RUN_LAST | GTK_RUN_ACTION,
 537                     GTK_CLASS_TYPE (object_class),
 538                     GTK_SIGNAL_OFFSET (GtkTextViewClass, set_anchor),
 539                     gtk_marshal_VOID__VOID,
 540                     GTK_TYPE_NONE, 0);
 541
 542   signals[INSERT_AT_CURSOR] =
 543     gtk_signal_new ("insert_at_cursor",
 544                     GTK_RUN_LAST | GTK_RUN_ACTION,
 545                     GTK_CLASS_TYPE (object_class),
 546                     GTK_SIGNAL_OFFSET (GtkTextViewClass, insert_at_cursor),
 547                     gtk_marshal_VOID__STRING,
 548                     GTK_TYPE_NONE, 1, GTK_TYPE_STRING);
 549
 550   signals[DELETE_FROM_CURSOR] =
 551     gtk_signal_new ("delete_from_cursor",
 552                     GTK_RUN_LAST | GTK_RUN_ACTION,
 553                     GTK_CLASS_TYPE (object_class),
 554                     GTK_SIGNAL_OFFSET (GtkTextViewClass, delete_from_cursor),
 555                     gtk_marshal_VOID__ENUM_INT,
 556                     GTK_TYPE_NONE, 2, GTK_TYPE_DELETE_TYPE, GTK_TYPE_INT);
 557
 558   signals[CUT_CLIPBOARD] =
 559     gtk_signal_new ("cut_clipboard",
 560                     GTK_RUN_LAST | GTK_RUN_ACTION,
 561                     GTK_CLASS_TYPE (object_class),
 562                     GTK_SIGNAL_OFFSET (GtkTextViewClass, cut_clipboard),
 563                     gtk_marshal_VOID__VOID,
 564                     GTK_TYPE_NONE, 0);
 565
 566   signals[COPY_CLIPBOARD] =
 567     gtk_signal_new ("copy_clipboard",
 568                     GTK_RUN_LAST | GTK_RUN_ACTION,
 569                     GTK_CLASS_TYPE (object_class),
 570                     GTK_SIGNAL_OFFSET (GtkTextViewClass, copy_clipboard),
 571                     gtk_marshal_VOID__VOID,
 572                     GTK_TYPE_NONE, 0);
 573
 574   signals[PASTE_CLIPBOARD] =
 575     gtk_signal_new ("paste_clipboard",
 576                     GTK_RUN_LAST | GTK_RUN_ACTION,
 577                     GTK_CLASS_TYPE (object_class),
 578                     GTK_SIGNAL_OFFSET (GtkTextViewClass, paste_clipboard),
 579                     gtk_marshal_VOID__VOID,
 580                     GTK_TYPE_NONE, 0);
 581
 582   signals[TOGGLE_OVERWRITE] =
 583     gtk_signal_new ("toggle_overwrite",
 584                     GTK_RUN_LAST | GTK_RUN_ACTION,
 585                     GTK_CLASS_TYPE (object_class),
 586                     GTK_SIGNAL_OFFSET (GtkTextViewClass, toggle_overwrite),
 587                     gtk_marshal_VOID__VOID,
 588                     GTK_TYPE_NONE, 0);
 589
 590   signals[SET_SCROLL_ADJUSTMENTS] =
 591     gtk_signal_new ("set_scroll_adjustments",
 592                     GTK_RUN_LAST,
 593                     GTK_CLASS_TYPE (object_class),
 594                     GTK_SIGNAL_OFFSET (GtkTextViewClass, set_scroll_adjustments),
 595                     gtk_marshal_VOID__OBJECT_OBJECT,
 596                     GTK_TYPE_NONE, 2, GTK_TYPE_ADJUSTMENT, GTK_TYPE_ADJUSTMENT);
 597   widget_class->set_scroll_adjustments_signal = signals[SET_SCROLL_ADJUSTMENTS];
 598
 599   signals[POPULATE_POPUP] =
 600     gtk_signal_new ("populate_popup",
 601                     GTK_RUN_LAST,
 602                     GTK_CLASS_TYPE (object_class),
 603                     GTK_SIGNAL_OFFSET (GtkTextViewClass, populate_popup),
 604                     gtk_marshal_VOID__OBJECT,
 605                     GTK_TYPE_NONE, 1, GTK_TYPE_MENU);
 606
 607   /*
 608    * Key bindings
 609    */
 610
 611   binding_set = gtk_binding_set_by_class (klass);
 612
 613   /* Moving the insertion point */
 614   add_move_binding (binding_set, GDK_Right, 0,
 615                     GTK_MOVEMENT_VISUAL_POSITIONS, 1);
 616
 617   add_move_binding (binding_set, GDK_Left, 0,
 618                     GTK_MOVEMENT_VISUAL_POSITIONS, -1);
 619
 620   add_move_binding (binding_set, GDK_f, GDK_CONTROL_MASK,
 621                     GTK_MOVEMENT_LOGICAL_POSITIONS, 1);
 622
 623   add_move_binding (binding_set, GDK_b, GDK_CONTROL_MASK,
 624                     GTK_MOVEMENT_LOGICAL_POSITIONS, -1);
 625
 626   add_move_binding (binding_set, GDK_Right, GDK_CONTROL_MASK,
 627                     GTK_MOVEMENT_WORDS, 1);
 628
 629   add_move_binding (binding_set, GDK_Left, GDK_CONTROL_MASK,
 630                     GTK_MOVEMENT_WORDS, -1);
 631
 632   /* Eventually we want to move by display lines, not paragraphs */
 633   add_move_binding (binding_set, GDK_Up, 0,
 634                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 635
 636   add_move_binding (binding_set, GDK_Down, 0,
 637                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 638
 639   add_move_binding (binding_set, GDK_p, GDK_CONTROL_MASK,
 640                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 641
 642   add_move_binding (binding_set, GDK_n, GDK_CONTROL_MASK,
 643                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 644
 645   add_move_binding (binding_set, GDK_a, GDK_CONTROL_MASK,
 646                     GTK_MOVEMENT_PARAGRAPH_ENDS, -1);
 647
 648   add_move_binding (binding_set, GDK_e, GDK_CONTROL_MASK,
 649                     GTK_MOVEMENT_PARAGRAPH_ENDS, 1);
 650
 651   add_move_binding (binding_set, GDK_f, GDK_MOD1_MASK,
 652                     GTK_MOVEMENT_WORDS, 1);
 653
 654   add_move_binding (binding_set, GDK_b, GDK_MOD1_MASK,
 655                     GTK_MOVEMENT_WORDS, -1);
 656
 657   add_move_binding (binding_set, GDK_Home, 0,
 658                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
 659
 660   add_move_binding (binding_set, GDK_End, 0,
 661                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
 662
 663   add_move_binding (binding_set, GDK_Home, GDK_CONTROL_MASK,
 664                     GTK_MOVEMENT_BUFFER_ENDS, -1);
 665
 666   add_move_binding (binding_set, GDK_End, GDK_CONTROL_MASK,
 667                     GTK_MOVEMENT_BUFFER_ENDS, 1);
 668
 669   add_move_binding (binding_set, GDK_Page_Up, 0,
 670                     GTK_MOVEMENT_PAGES, -1);
 671
 672   add_move_binding (binding_set, GDK_Page_Down, 0,
 673                     GTK_MOVEMENT_PAGES, 1);
 674
 675
 676   /* Setting the cut/paste/copy anchor */
 677   gtk_binding_entry_add_signal (binding_set, GDK_space, GDK_CONTROL_MASK,
 678                                 "set_anchor", 0);
 679
 680   /* Deleting text */
 681   gtk_binding_entry_add_signal (binding_set, GDK_Delete, 0,
 682                                 "delete_from_cursor", 2,
 683                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 684                                 GTK_TYPE_INT, 1);
 685
 686   gtk_binding_entry_add_signal (binding_set, GDK_KP_Delete, 0,
 687                                 "delete_from_cursor", 2,
 688                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 689                                 GTK_TYPE_INT, 1);
 690
 691   gtk_binding_entry_add_signal (binding_set, GDK_d, GDK_CONTROL_MASK,
 692                                 "delete_from_cursor", 2,
 693                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 694                                 GTK_TYPE_INT, 1);
 695
 696   gtk_binding_entry_add_signal (binding_set, GDK_BackSpace, 0,
 697                                 "delete_from_cursor", 2,
 698                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 699                                 GTK_TYPE_INT, -1);
 700
 701   gtk_binding_entry_add_signal (binding_set, GDK_Delete, GDK_CONTROL_MASK,
 702                                 "delete_from_cursor", 2,
 703                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 704                                 GTK_TYPE_INT, 1);
 705
 706   gtk_binding_entry_add_signal (binding_set, GDK_KP_Delete, GDK_CONTROL_MASK,
 707                                 "delete_from_cursor", 2,
 708                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 709                                 GTK_TYPE_INT, 1);
 710
 711   gtk_binding_entry_add_signal (binding_set, GDK_d, GDK_MOD1_MASK,
 712                                 "delete_from_cursor", 2,
 713                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 714                                 GTK_TYPE_INT, 1);
 715
 716   gtk_binding_entry_add_signal (binding_set, GDK_BackSpace, GDK_CONTROL_MASK,
 717                                 "delete_from_cursor", 2,
 718                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 719                                 GTK_TYPE_INT, -1);
 720
 721   gtk_binding_entry_add_signal (binding_set, GDK_k, GDK_CONTROL_MASK,
 722                                 "delete_from_cursor", 2,
 723                                 GTK_TYPE_ENUM, GTK_DELETE_PARAGRAPH_ENDS,
 724                                 GTK_TYPE_INT, 1);
 725
 726   gtk_binding_entry_add_signal (binding_set, GDK_u, GDK_CONTROL_MASK,
 727                                 "delete_from_cursor", 2,
 728                                 GTK_TYPE_ENUM, GTK_DELETE_PARAGRAPHS,
 729                                 GTK_TYPE_INT, 1);
 730
 731   gtk_binding_entry_add_signal (binding_set, GDK_space, GDK_MOD1_MASK,
 732                                 "delete_from_cursor", 2,
 733                                 GTK_TYPE_ENUM, GTK_DELETE_WHITESPACE,
 734                                 GTK_TYPE_INT, 1);
 735   gtk_binding_entry_add_signal (binding_set, GDK_space, GDK_MOD1_MASK,
 736                                 "insert_at_cursor", 1,
 737                                 GTK_TYPE_STRING, " ");
 738
 739   gtk_binding_entry_add_signal (binding_set, GDK_backslash, GDK_MOD1_MASK,
 740                                 "delete_from_cursor", 2,
 741                                 GTK_TYPE_ENUM, GTK_DELETE_WHITESPACE,
 742                                 GTK_TYPE_INT, 1);
 743
 744   /* Cut/copy/paste */
 745
 746   gtk_binding_entry_add_signal (binding_set, GDK_x, GDK_CONTROL_MASK,
 747                                 "cut_clipboard", 0);
 748
 749   gtk_binding_entry_add_signal (binding_set, GDK_w, GDK_CONTROL_MASK,
 750                                 "cut_clipboard", 0);
 751
 752   gtk_binding_entry_add_signal (binding_set, GDK_c, GDK_CONTROL_MASK,
 753                                 "copy_clipboard", 0);
 754
 755   gtk_binding_entry_add_signal (binding_set, GDK_v, GDK_CONTROL_MASK,
 756                                 "paste_clipboard", 0);
 757
 758   gtk_binding_entry_add_signal (binding_set, GDK_y, GDK_CONTROL_MASK,
 759                                 "paste_clipboard", 0);
 760
 761   /* Overwrite */
 762   gtk_binding_entry_add_signal (binding_set, GDK_Insert, 0,
 763                                 "toggle_overwrite", 0);
 764 }
 765
 766 void
 767 gtk_text_view_init (GtkTextView *text_view)
 768 {
 769   GtkWidget *widget;
 770
 771   widget = GTK_WIDGET (text_view);
 772
 773   GTK_WIDGET_SET_FLAGS (widget, GTK_CAN_FOCUS);
 774
 775   /* Set up default style */
 776   text_view->wrap_mode = GTK_WRAP_NONE;
 777   text_view->pixels_above_lines = 0;
 778   text_view->pixels_below_lines = 0;
 779   text_view->pixels_inside_wrap = 0;
 780   text_view->justify = GTK_JUSTIFY_LEFT;
 781   text_view->left_margin = 0;
 782   text_view->right_margin = 0;
 783   text_view->indent = 0;
 784   text_view->tabs = NULL;
 785   text_view->editable = TRUE;
 786
 787   gtk_drag_dest_set (widget,
 788                      GTK_DEST_DEFAULT_DROP,
 789                      target_table, G_N_ELEMENTS (target_table),
 790                      GDK_ACTION_COPY | GDK_ACTION_MOVE);
 791
 792   text_view->virtual_cursor_x = -1;
 793   text_view->virtual_cursor_y = -1;
 794
 795   /* This object is completely private. No external entity can gain a reference
 796    * to it; so we create it here and destroy it in finalize ().
 797    */
 798   text_view->im_context = gtk_im_multicontext_new ();
 799
 800   gtk_signal_connect (GTK_OBJECT (text_view->im_context), "commit",
 801                       GTK_SIGNAL_FUNC (gtk_text_view_commit_handler), text_view);
 802
 803   gtk_signal_connect (GTK_OBJECT (text_view->im_context), "preedit_changed",
 804                       GTK_SIGNAL_FUNC (gtk_text_view_preedit_changed_handler), text_view);
 805
 806   text_view->cursor_visible = TRUE;
 807
 808   text_view->text_window = text_window_new (GTK_TEXT_WINDOW_TEXT,
 809                                             widget, 200, 200);
 810
 811   text_view->drag_start_x = -1;
 812   text_view->drag_start_y = -1;
 813 }
 814
 815 /**
 816  * gtk_text_view_new:
 817  *
 818  * Creates a new #GtkTextView. If you don't call gtk_text_view_set_buffer()
 819  * before using the text view, an empty default buffer will be created
 820  * for you. Get the buffer with gtk_text_view_get_buffer(). If you want
 821  * to specify your own buffer, consider gtk_text_view_new_with_buffer().
 822  *
 823  * Return value: a new #GtkTextView
 824  **/
 825 GtkWidget*
 826 gtk_text_view_new (void)
 827 {
 828   return GTK_WIDGET (gtk_type_new (gtk_text_view_get_type ()));
 829 }
 830
 831 /**
 832  * gtk_text_view_new_with_buffer:
 833  * @buffer: a #GtkTextBuffer
 834  *
 835  * Creates a new #GtkTextView widget displaying the buffer
 836  * @buffer. One buffer can be shared among many widgets.
 837  * @buffer may be NULL to create a default buffer, in which case
 838  * this function is equivalent to gtk_text_view_new(). The
 839  * text view adds its own reference count to the buffer; it does not
 840  * take over an existing reference.
 841  *
 842  * Return value: a new #GtkTextView.
 843  **/
 844 GtkWidget*
 845 gtk_text_view_new_with_buffer (GtkTextBuffer *buffer)
 846 {
 847   GtkTextView *text_view;
 848
 849   text_view = (GtkTextView*)gtk_text_view_new ();
 850
 851   gtk_text_view_set_buffer (text_view, buffer);
 852
 853   return GTK_WIDGET (text_view);
 854 }
 855
 856 /**
 857  * gtk_text_view_set_buffer:
 858  * @text_view: a #GtkTextView
 859  * @buffer: a #GtkTextBuffer
 860  *
 861  * Sets @buffer as the buffer being displayed by @text_view. The previous
 862  * buffer displayed by the text view is unreferenced, and a reference is
 863  * added to @buffer. If you owned a reference to @buffer before passing it
 864  * to this function, you must remove that reference yourself; #GtkTextView
 865  * will not "adopt" it.
 866  *
 867  **/
 868 void
 869 gtk_text_view_set_buffer (GtkTextView   *text_view,
 870                           GtkTextBuffer *buffer)
 871 {
 872   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
 873   g_return_if_fail (buffer == NULL || GTK_IS_TEXT_BUFFER (buffer));
 874
 875   if (text_view->buffer == buffer)
 876     return;
 877
 878   if (text_view->buffer != NULL)
 879     {
 880       /* Destroy all anchored children */
 881       GSList *tmp_list;
 882       GSList *copy;
 883
 884       copy = g_slist_copy (text_view->children);
 885       tmp_list = copy;
 886       while (tmp_list != NULL)
 887         {
 888           GtkTextViewChild *vc = tmp_list->data;
 889
 890           if (vc->anchor)
 891             {
 892               gtk_widget_destroy (vc->widget);
 893               /* vc may now be invalid! */
 894             }
 895
 896           tmp_list = g_slist_next (tmp_list);
 897         }
 898
 899       g_slist_free (copy);
 900
 901       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->buffer),
 902                                             gtk_text_view_mark_set_handler, text_view);
 903       g_object_unref (G_OBJECT (text_view->buffer));
 904       text_view->dnd_mark = NULL;
 905     }
 906
 907   text_view->buffer = buffer;
 908
 909   if (buffer != NULL)
 910     {
 911       GtkTextIter start;
 912
 913       g_object_ref (G_OBJECT (buffer));
 914
 915       if (text_view->layout)
 916         gtk_text_layout_set_buffer (text_view->layout, buffer);
 917
 918       gtk_text_buffer_get_iter_at_offset (text_view->buffer, &start, 0);
 919
 920       text_view->dnd_mark = gtk_text_buffer_create_mark (text_view->buffer,
 921                                                          "gtk_drag_target",
 922                                                          &start, FALSE);
 923
 924       text_view->first_para_mark = gtk_text_buffer_create_mark (text_view->buffer,
 925                                                                 NULL,
 926                                                                 &start, TRUE);
 927
 928       text_view->first_para_pixels = 0;
 929
 930       g_signal_connect_data (G_OBJECT (text_view->buffer), "mark_set",
 931                              gtk_text_view_mark_set_handler, text_view,
 932                              NULL, FALSE, FALSE);
 933     }
 934
 935   if (GTK_WIDGET_VISIBLE (text_view))
 936     gtk_widget_queue_draw (GTK_WIDGET (text_view));
 937 }
 938
 939 static GtkTextBuffer*
 940 get_buffer (GtkTextView *text_view)
 941 {
 942   if (text_view->buffer == NULL)
 943     {
 944       GtkTextBuffer *b;
 945       b = gtk_text_buffer_new (NULL);
 946       gtk_text_view_set_buffer (text_view, b);
 947       g_object_unref (G_OBJECT (b));
 948     }
 949
 950   return text_view->buffer;
 951 }
 952
 953 /**
 954  * gtk_text_view_get_buffer:
 955  * @text_view: a #GtkTextView
 956  *
 957  * Returns the #GtkTextBuffer being displayed by this text view.
 958  * The reference count on the buffer is not incremented; the caller
 959  * of this function won't own a new reference.
 960  *
 961  * Return value: a #GtkTextBuffer
 962  **/
 963 GtkTextBuffer*
 964 gtk_text_view_get_buffer (GtkTextView *text_view)
 965 {
 966   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
 967
 968   return get_buffer (text_view);
 969 }
 970
 971 /**
 972  * gtk_text_view_get_iter_at_location:
 973  * @text_view: a #GtkTextView
 974  * @iter: a #GtkTextIter
 975  * @x: x position, in buffer coordinates
 976  * @y: y position, in buffer coordinates
 977  *
 978  * Retrieves the iterator at buffer coordinates @x and @y. Buffer
 979  * coordinates are coordinates for the entire buffer, not just the
 980  * currently-displayed portion.  If you have coordinates from an
 981  * event, you have to convert those to buffer coordinates with
 982  * gtk_text_view_window_to_buffer_coords().
 983  *
 984  **/
 985 void
 986 gtk_text_view_get_iter_at_location (GtkTextView *text_view,
 987                                     GtkTextIter *iter,
 988                                     gint         x,
 989                                     gint         y)
 990 {
 991   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
 992   g_return_if_fail (iter != NULL);
 993   g_return_if_fail (text_view->layout != NULL);
 994
 995   gtk_text_layout_get_iter_at_pixel (text_view->layout,
 996                                      iter,
 997                                      x,
 998                                      y);
 999 }
1000
1001 /**
1002  * gtk_text_view_get_iter_location:
1003  * @text_view: a #GtkTextView
1004  * @iter: a #GtkTextIter
1005  * @location: bounds of the character at @iter
1006  *
1007  * Gets a rectangle which roughly contains the character at @iter.
1008  * The rectangle position is in buffer coordinates; use
1009  * gtk_text_view_buffer_to_window_coords() to convert these
1010  * coordinates to coordinates for one of the windows in the text view.
1011  *
1012  **/
1013 void
1014 gtk_text_view_get_iter_location (GtkTextView       *text_view,
1015                                  const GtkTextIter *iter,
1016                                  GdkRectangle      *location)
1017 {
1018   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1019   g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
1020
1021   gtk_text_layout_get_iter_location (text_view->layout, iter, location);
1022 }
1023
1024 /**
1025  * gtk_text_view_get_line_yrange:
1026  * @text_view: a #GtkTextView
1027  * @iter: a #GtkTextIter
1028  * @y: return location for a y coordinate
1029  * @height: return location for a height
1030  *
1031  * Gets the y coordinate of the top of the line containing @iter,
1032  * and the height of the line. The coordinate is a buffer coordinate;
1033  * convert to window coordinates with gtk_text_view_buffer_to_window_coords().
1034  *
1035  **/
1036 void
1037 gtk_text_view_get_line_yrange (GtkTextView       *text_view,
1038                                const GtkTextIter *iter,
1039                                gint              *y,
1040                                gint              *height)
1041 {
1042   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1043   g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
1044
1045   gtk_text_layout_get_line_yrange (text_view->layout,
1046                                    iter,
1047                                    y,
1048                                    height);
1049 }
1050
1051 /**
1052  * gtk_text_view_get_line_at_y:
1053  * @text_view: a #GtkTextView
1054  * @target_iter: a #GtkTextIter
1055  * @y: a y coordinate
1056  * @line_top: return location for top coordinate of the line
1057  *
1058  * Gets the #GtkTextIter at the start of the line containing
1059  * the coordinate @y. @y is in buffer coordinates, convert from
1060  * window coordinates with gtk_text_view_window_to_buffer_coords().
1061  * If non-%NULL, @line_top will be filled with the coordinate of the top
1062  * edge of the line.
1063  **/
1064 void
1065 gtk_text_view_get_line_at_y (GtkTextView *text_view,
1066                              GtkTextIter *target_iter,
1067                              gint         y,
1068                              gint        *line_top)
1069 {
1070   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1071
1072   gtk_text_layout_get_line_at_y (text_view->layout,
1073                                  target_iter,
1074                                  y,
1075                                  line_top);
1076 }
1077
1078 static gboolean
1079 set_adjustment_clamped (GtkAdjustment *adj, gdouble val)
1080 {
1081   /* We don't really want to clamp to upper; we want to clamp to
1082      upper - page_size which is the highest value the scrollbar
1083      will let us reach. */
1084   if (val > (adj->upper - adj->page_size))
1085     val = adj->upper - adj->page_size;
1086
1087   if (val < adj->lower)
1088     val = adj->lower;
1089
1090   if (val != adj->value)
1091     {
1092       gtk_adjustment_set_value (adj, val);
1093       return TRUE;
1094     }
1095   else
1096     return FALSE;
1097 }
1098
1099 /**
1100  * gtk_text_view_scroll_to_iter:
1101  * @text_view: a #GtkTextView
1102  * @iter: a #GtkTextIter
1103  * @within_margin: margin as a [0.0,0.5) fraction of screen size
1104  * @use_align: whether to use alignment arguments (if %FALSE, just get the mark onscreen)
1105  * @xalign: horizontal alignment of mark within visible area.
1106  * @yalign: vertical alignment of mark within visible area
1107  *
1108  * Scrolls @text_view so that @iter is on the screen in the position
1109  * indicated by @xalign and @yalign. An alignment of 0.0 indicates
1110  * left or top, 1.0 indicates right or bottom, 0.5 means center. If @use_align
1111  * is %FALSE, the text scrolls the minimal distance to get the mark onscreen,
1112  * possibly not scrolling at all. The effective screen for purposes
1113  * of this function is reduced by a margin of size @within_margin.
1114  * NOTE: This function uses the currently-computed height of the
1115  * lines in the text buffer. Note that line heights are computed
1116  * in an idle handler; so this function may not have the desired effect
1117  * if it's called before the height computations. To avoid oddness,
1118  * consider using gtk_text_view_scroll_to_mark() which saves a point
1119  * to be scrolled to after line validation.
1120  *
1121  * Return value: %TRUE if scrolling occurred
1122  **/
1123 gboolean
1124 gtk_text_view_scroll_to_iter (GtkTextView   *text_view,
1125                               GtkTextIter   *iter,
1126                               gdouble        within_margin,
1127                               gboolean       use_align,
1128                               gdouble        xalign,
1129                               gdouble        yalign)
1130 {
1131   GdkRectangle rect;
1132   GdkRectangle screen;
1133   gint screen_bottom;
1134   gint screen_right;
1135   gint scroll_dest;
1136   GtkWidget *widget;
1137   gboolean retval = FALSE;
1138   gint scroll_inc;
1139   gint screen_xoffset, screen_yoffset;
1140   gint current_x_scroll, current_y_scroll;
1141
1142   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1143   g_return_val_if_fail (iter != NULL, FALSE);
1144   g_return_val_if_fail (within_margin >= 0.0 && within_margin < 0.5, FALSE);
1145   g_return_val_if_fail (xalign >= 0.0 && xalign <= 1.0, FALSE);
1146   g_return_val_if_fail (yalign >= 0.0 && yalign <= 1.0, FALSE);
1147
1148   widget = GTK_WIDGET (text_view);
1149
1150   DV(g_print(G_STRLOC"\n"));
1151
1152   if (!GTK_WIDGET_MAPPED (widget))
1153     {
1154       g_warning ("%s: calling this function before mapping the GtkTextView doesn't make sense, maybe try gtk_text_view_scroll_to_mark() instead", G_STRLOC);
1155       return FALSE;
1156     }
1157
1158   gtk_text_layout_get_iter_location (text_view->layout,
1159                                      iter,
1160                                      &rect);
1161
1162   current_x_scroll = text_view->xoffset;
1163   current_y_scroll = text_view->yoffset;
1164
1165   screen.x = current_x_scroll;
1166   screen.y = current_y_scroll;
1167   screen.width = SCREEN_WIDTH (widget);
1168   screen.height = SCREEN_HEIGHT (widget);
1169
1170   screen_xoffset = screen.width * within_margin;
1171   screen_yoffset = screen.height * within_margin;
1172
1173   screen.x += screen_xoffset;
1174   screen.y += screen_yoffset;
1175   screen.width -= screen_xoffset * 2;
1176   screen.height -= screen_yoffset * 2;
1177
1178   /* paranoia check */
1179   if (screen.width < 1)
1180     screen.width = 1;
1181   if (screen.height < 1)
1182     screen.height = 1;
1183
1184   screen_right = screen.x + screen.width;
1185   screen_bottom = screen.y + screen.height;
1186
1187   /* The alignment affects the point in the target character that we
1188    * choose to align. If we're doing right/bottom alignment, we align
1189    * the right/bottom edge of the character the mark is at; if we're
1190    * doing left/top we align the left/top edge of the character; if
1191    * we're doing center alignment we align the center of the
1192    * character.
1193    */
1194
1195   /* Vertical scroll */
1196
1197   scroll_inc = 0;
1198   scroll_dest = current_y_scroll;
1199
1200   if (use_align)
1201     {
1202       scroll_dest = rect.y + (rect.height * yalign) - (screen.height * yalign);
1203
1204       /* if scroll_dest < screen.y, we move a negative increment (up),
1205        * else a positive increment (down)
1206        */
1207       scroll_inc = scroll_dest - screen.y + screen_yoffset;
1208     }
1209   else
1210     {
1211       /* move minimum to get onscreen */
1212       if (rect.y < screen.y)
1213         {
1214           scroll_dest = rect.y;
1215           scroll_inc = scroll_dest - screen.y - screen_yoffset;
1216         }
1217       else if ((rect.y + rect.height) > screen_bottom)
1218         {
1219           scroll_dest = rect.y + rect.height;
1220           scroll_inc = scroll_dest - screen_bottom + screen_yoffset;
1221         }
1222     }
1223
1224   if (scroll_inc != 0)
1225     {
1226       retval = set_adjustment_clamped (get_vadjustment (text_view),
1227                                        current_y_scroll + scroll_inc);
1228     }
1229
1230   /* Horizontal scroll */
1231
1232   scroll_inc = 0;
1233   scroll_dest = current_x_scroll;
1234
1235   if (use_align)
1236     {
1237       scroll_dest = rect.x + (rect.width * xalign) - (screen.width * xalign);
1238
1239       /* if scroll_dest < screen.y, we move a negative increment (left),
1240        * else a positive increment (right)
1241        */
1242       scroll_inc = scroll_dest - screen.x + screen_xoffset;
1243     }
1244   else
1245     {
1246       /* move minimum to get onscreen */
1247       if (rect.x < screen.x)
1248         {
1249           scroll_dest = rect.x;
1250           scroll_inc = scroll_dest - screen.x - screen_xoffset;
1251         }
1252       else if ((rect.x + rect.width) > screen_right)
1253         {
1254           scroll_dest = rect.x + rect.width;
1255           scroll_inc = scroll_dest - screen_right + screen_xoffset;
1256         }
1257     }
1258
1259   if (scroll_inc != 0)
1260     {
1261       retval = set_adjustment_clamped (get_hadjustment (text_view),
1262                                        current_x_scroll + scroll_inc);
1263     }
1264
1265   if (retval)
1266     DV(g_print (">Actually scrolled ("G_STRLOC")\n"));
1267   else
1268     DV(g_print (">Didn't end up scrolling ("G_STRLOC")\n"));
1269
1270   return retval;
1271 }
1272
1273 static void
1274 free_pending_scroll (GtkTextPendingScroll *scroll)
1275 {
1276   if (!gtk_text_mark_get_deleted (scroll->mark))
1277     gtk_text_buffer_delete_mark (gtk_text_mark_get_buffer (scroll->mark),
1278                                  scroll->mark);
1279   g_object_unref (G_OBJECT (scroll->mark));
1280   g_free (scroll);
1281 }
1282
1283 static void
1284 gtk_text_view_queue_scroll (GtkTextView   *text_view,
1285                             GtkTextMark   *mark,
1286                             gdouble        within_margin,
1287                             gboolean       use_align,
1288                             gdouble        xalign,
1289                             gdouble        yalign)
1290 {
1291   GtkTextIter iter;
1292   GtkTextPendingScroll *scroll;
1293
1294   DV(g_print(G_STRLOC"\n"));
1295
1296   scroll = g_new (GtkTextPendingScroll, 1);
1297
1298   scroll->within_margin = within_margin;
1299   scroll->use_align = use_align;
1300   scroll->xalign = xalign;
1301   scroll->yalign = yalign;
1302
1303   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
1304
1305   scroll->mark = gtk_text_buffer_create_mark (get_buffer (text_view),
1306                                               NULL,
1307                                               &iter,
1308                                               gtk_text_mark_get_left_gravity (mark));
1309
1310   g_object_ref (G_OBJECT (scroll->mark));
1311
1312   if (text_view->pending_scroll)
1313     free_pending_scroll (text_view->pending_scroll);
1314
1315   text_view->pending_scroll = scroll;
1316 }
1317
1318 static gboolean
1319 gtk_text_view_flush_scroll (GtkTextView *text_view)
1320 {
1321   GtkTextIter iter, start, end;
1322   GtkTextPendingScroll *scroll;
1323   gint y0, y1, height;
1324   gboolean retval;
1325
1326   DV(g_print(G_STRLOC"\n"));
1327
1328   if (text_view->pending_scroll == NULL)
1329     return FALSE;
1330
1331   scroll = text_view->pending_scroll;
1332
1333   /* avoid recursion */
1334   text_view->pending_scroll = NULL;
1335
1336   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, scroll->mark);
1337
1338   start = iter;
1339   end = iter;
1340
1341   /* Force-validate the region around the iterator, at least the lines
1342    * on either side, so that we can meaningfully get the iter location
1343    */
1344   gtk_text_iter_backward_line (&start);
1345   gtk_text_iter_forward_line (&end);
1346
1347   gtk_text_layout_get_line_yrange (text_view->layout, &start, &y0, NULL);
1348   gtk_text_layout_get_line_yrange (text_view->layout, &end, &y1, &height);
1349
1350   DV(g_print (">Validating scroll destination ("G_STRLOC")\n"));
1351   gtk_text_layout_validate_yrange (text_view->layout, &start, y0, y1 + height);
1352
1353   DV(g_print (">Done validating scroll destination ("G_STRLOC")\n"));
1354
1355   retval = gtk_text_view_scroll_to_iter (text_view,
1356                                          &iter,
1357                                          scroll->within_margin,
1358                                          scroll->use_align,
1359                                          scroll->xalign,
1360                                          scroll->yalign);
1361
1362   free_pending_scroll (scroll);
1363
1364   return retval;
1365 }
1366
1367 static void
1368 gtk_text_view_set_adjustment_upper (GtkAdjustment *adj, gdouble upper)
1369 {
1370   if (upper != adj->upper)
1371     {
1372       gdouble min = MAX (0., upper - adj->page_size);
1373       gboolean value_changed = FALSE;
1374
1375       adj->upper = upper;
1376
1377       if (adj->value > min)
1378         {
1379           adj->value = min;
1380           value_changed = TRUE;
1381         }
1382
1383       gtk_signal_emit_by_name (GTK_OBJECT (adj), "changed");
1384       DV(g_print(">Changed adj upper to %d ("G_STRLOC")\n", upper));
1385
1386       if (value_changed)
1387         {
1388           DV(g_print(">Changed adj value because upper descreased ("G_STRLOC")\n"));
1389           gtk_signal_emit_by_name (GTK_OBJECT (adj), "value_changed");
1390         }
1391     }
1392 }
1393
1394 static void
1395 gtk_text_view_update_adjustments (GtkTextView *text_view)
1396 {
1397   gint width = 0, height = 0;
1398
1399   DV(g_print(">Updating adjustments ("G_STRLOC")\n"));
1400
1401   gtk_text_layout_get_size (text_view->layout, &width, &height);
1402
1403   if (text_view->width != width || text_view->height != height)
1404     {
1405       text_view->width = width;
1406       text_view->height = height;
1407
1408       gtk_text_view_set_adjustment_upper (get_hadjustment (text_view),
1409                                           MAX (SCREEN_WIDTH (text_view), width));
1410       gtk_text_view_set_adjustment_upper (get_vadjustment (text_view),
1411                                           MAX (SCREEN_HEIGHT (text_view), height));
1412
1413       /* hadj/vadj exist since we called get_hadjustment/get_vadjustment above */
1414
1415       /* Set up the step sizes; we'll say that a page is
1416          our allocation minus one step, and a step is
1417          1/10 of our allocation. */
1418       text_view->hadjustment->step_increment =
1419         SCREEN_WIDTH (text_view) / 10.0;
1420       text_view->hadjustment->page_increment =
1421         SCREEN_WIDTH (text_view) * 0.9;
1422
1423       text_view->vadjustment->step_increment =
1424         SCREEN_HEIGHT (text_view) / 10.0;
1425       text_view->vadjustment->page_increment =
1426         SCREEN_HEIGHT (text_view) * 0.9;
1427
1428       gtk_signal_emit_by_name (GTK_OBJECT (get_hadjustment (text_view)), "changed");
1429       gtk_signal_emit_by_name (GTK_OBJECT (get_hadjustment (text_view)), "changed");
1430     }
1431 }
1432
1433 static void
1434 gtk_text_view_update_layout_width (GtkTextView *text_view)
1435 {
1436   DV(g_print(">Updating layout width ("G_STRLOC")\n"));
1437
1438   gtk_text_view_ensure_layout (text_view);
1439
1440   gtk_text_layout_set_screen_width (text_view->layout,
1441                                     SCREEN_WIDTH (text_view));
1442 }
1443
1444 /**
1445  * gtk_text_view_scroll_to_mark:
1446  * @text_view: a #GtkTextView
1447  * @mark: a #GtkTextMark
1448  * @within_margin: margin as a [0.0,0.5) fraction of screen size
1449  * @use_align: whether to use alignment arguments (if %FALSE, just get the mark onscreen)
1450  * @xalign: horizontal alignment of mark within visible area.
1451  * @yalign: vertical alignment of mark within visible area
1452  *
1453  * Scrolls @text_view so that @mark is on the screen in the position
1454  * indicated by @xalign and @yalign. An alignment of 0.0 indicates
1455  * left or top, 1.0 indicates right or bottom, 0.5 means center. If @use_align
1456  * is %FALSE, the text scrolls the minimal distance to get the mark onscreen,
1457  * possibly not scrolling at all. The effective screen for purposes
1458  * of this function is reduced by a margin of size @within_margin.
1459  *
1460  **/
1461 void
1462 gtk_text_view_scroll_to_mark (GtkTextView *text_view,
1463                               GtkTextMark *mark,
1464                               gdouble      within_margin,
1465                               gboolean     use_align,
1466                               gdouble      xalign,
1467                               gdouble      yalign)
1468 {
1469   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1470   g_return_if_fail (GTK_IS_TEXT_MARK (mark));
1471   g_return_if_fail (within_margin >= 0.0 && within_margin < 0.5);
1472   g_return_if_fail (xalign >= 0.0 && xalign <= 1.0);
1473   g_return_if_fail (yalign >= 0.0 && yalign <= 1.0);
1474
1475   gtk_text_view_queue_scroll (text_view, mark,
1476                               within_margin,
1477                               use_align,
1478                               xalign,
1479                               yalign);
1480
1481   /* If no validation is pending, we need to go ahead and force an
1482    * immediate scroll.
1483    */
1484   if (text_view->layout &&
1485       gtk_text_layout_is_valid (text_view->layout))
1486     gtk_text_view_flush_scroll (text_view);
1487 }
1488
1489 void
1490 gtk_text_view_scroll_mark_onscreen (GtkTextView *text_view,
1491                                     GtkTextMark *mark)
1492 {
1493   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1494   g_return_if_fail (GTK_IS_TEXT_MARK (mark));
1495
1496   gtk_text_view_scroll_to_mark (text_view, mark, 0.0, FALSE, 0.0, 0.0);
1497 }
1498
1499 static gboolean
1500 clamp_iter_onscreen (GtkTextView *text_view, GtkTextIter *iter)
1501 {
1502   GdkRectangle visible_rect;
1503   gtk_text_view_get_visible_rect (text_view, &visible_rect);
1504
1505   return gtk_text_layout_clamp_iter_to_vrange (text_view->layout, iter,
1506                                                visible_rect.y,
1507                                                visible_rect.y + visible_rect.height);
1508 }
1509
1510 /**
1511  * gtk_text_view_move_mark_onscreen:
1512  * @text_view: a #GtkTextView
1513  * @mark: a #GtkTextMark
1514  *
1515  * Moves a mark within the buffer so that it's
1516  * located within the currently-visible text area.
1517  *
1518  * Return value: %TRUE if the mark moved (wasn't already onscreen)
1519  **/
1520 gboolean
1521 gtk_text_view_move_mark_onscreen (GtkTextView *text_view,
1522                                   GtkTextMark *mark)
1523 {
1524   GtkTextIter iter;
1525
1526   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1527   g_return_val_if_fail (mark != NULL, FALSE);
1528
1529   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
1530
1531   if (clamp_iter_onscreen (text_view, &iter))
1532     {
1533       gtk_text_buffer_move_mark (get_buffer (text_view), mark, &iter);
1534       return TRUE;
1535     }
1536   else
1537     return FALSE;
1538 }
1539
1540 /**
1541  * gtk_text_view_get_visible_rect:
1542  * @text_view: a #GtkTextView
1543  * @visible_rect: rectangle to fill
1544  *
1545  * Fills @visible_rect with the currently-visible
1546  * region of the buffer, in buffer coordinates. Convert to window coordinates
1547  * with gtk_text_view_buffer_to_window_coords().
1548  **/
1549 void
1550 gtk_text_view_get_visible_rect (GtkTextView  *text_view,
1551                                 GdkRectangle *visible_rect)
1552 {
1553   GtkWidget *widget;
1554
1555   g_return_if_fail (text_view != NULL);
1556   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1557
1558   widget = GTK_WIDGET (text_view);
1559
1560   if (visible_rect)
1561     {
1562       visible_rect->x = text_view->xoffset;
1563       visible_rect->y = text_view->yoffset;
1564       visible_rect->width = SCREEN_WIDTH (widget);
1565       visible_rect->height = SCREEN_HEIGHT (widget);
1566
1567       DV(g_print(" visible rect: %d,%d %d x %d\n",
1568                  visible_rect->x,
1569                  visible_rect->y,
1570                  visible_rect->width,
1571                  visible_rect->height));
1572     }
1573 }
1574
1575 /**
1576  * gtk_text_view_set_wrap_mode:
1577  * @text_view: a #GtkTextView
1578  * @wrap_mode: a #GtkWrapMode
1579  *
1580  * Sets the line wrapping for the view.
1581  **/
1582 void
1583 gtk_text_view_set_wrap_mode (GtkTextView *text_view,
1584                              GtkWrapMode  wrap_mode)
1585 {
1586   g_return_if_fail (text_view != NULL);
1587   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1588
1589   if (text_view->wrap_mode != wrap_mode)
1590     {
1591       text_view->wrap_mode = wrap_mode;
1592
1593       if (text_view->layout)
1594         {
1595           text_view->layout->default_style->wrap_mode = wrap_mode;
1596           gtk_text_layout_default_style_changed (text_view->layout);
1597         }
1598     }
1599 }
1600
1601 /**
1602  * gtk_text_view_get_wrap_mode:
1603  * @text_view: a #GtkTextView
1604  *
1605  * Gets the line wrapping for the view.
1606  *
1607  * Return value: the line wrap setting
1608  **/
1609 GtkWrapMode
1610 gtk_text_view_get_wrap_mode (GtkTextView *text_view)
1611 {
1612   g_return_val_if_fail (text_view != NULL, GTK_WRAP_NONE);
1613   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_WRAP_NONE);
1614
1615   return text_view->wrap_mode;
1616 }
1617
1618 /**
1619  * gtk_text_view_set_editable:
1620  * @text_view: a #GtkTextView
1621  * @setting: whether it's editable
1622  *
1623  * Sets the default editability of the #GtkTextView. You can override
1624  * this default setting with tags in the buffer, using the "editable"
1625  * attribute of tags.
1626  **/
1627 void
1628 gtk_text_view_set_editable (GtkTextView *text_view,
1629                             gboolean     setting)
1630 {
1631   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1632
1633   if (text_view->editable != setting)
1634     {
1635       text_view->editable = setting;
1636
1637       if (text_view->layout)
1638         {
1639           text_view->layout->default_style->editable = text_view->editable;
1640           gtk_text_layout_default_style_changed (text_view->layout);
1641         }
1642     }
1643 }
1644
1645 /**
1646  * gtk_text_view_get_editable:
1647  * @text_view: a #GtkTextView
1648  *
1649  * Returns the default editability of the #GtkTextView. Tags in the
1650  * buffer may override this setting for some ranges of text.
1651  *
1652  * Return value: whether text is editable by default
1653  **/
1654 gboolean
1655 gtk_text_view_get_editable (GtkTextView *text_view)
1656 {
1657   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1658
1659   return text_view->editable;
1660 }
1661
1662 void
1663 gtk_text_view_set_pixels_above_lines (GtkTextView *text_view,
1664                                       gint         pixels_above_lines)
1665 {
1666   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1667
1668   if (text_view->pixels_above_lines != pixels_above_lines)
1669     {
1670       text_view->pixels_above_lines = pixels_above_lines;
1671
1672       if (text_view->layout)
1673         {
1674           text_view->layout->default_style->pixels_above_lines = pixels_above_lines;
1675           gtk_text_layout_default_style_changed (text_view->layout);
1676         }
1677     }
1678 }
1679
1680 gint
1681 gtk_text_view_get_pixels_above_lines (GtkTextView *text_view)
1682 {
1683   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1684
1685   return text_view->pixels_above_lines;
1686 }
1687
1688 void
1689 gtk_text_view_set_pixels_below_lines (GtkTextView *text_view,
1690                                       gint         pixels_below_lines)
1691 {
1692   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1693
1694   if (text_view->pixels_below_lines != pixels_below_lines)
1695     {
1696       text_view->pixels_below_lines = pixels_below_lines;
1697
1698       if (text_view->layout)
1699         {
1700           text_view->layout->default_style->pixels_below_lines = pixels_below_lines;
1701           gtk_text_layout_default_style_changed (text_view->layout);
1702         }
1703     }
1704 }
1705
1706 gint
1707 gtk_text_view_get_pixels_below_lines (GtkTextView *text_view)
1708 {
1709   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1710
1711   return text_view->pixels_below_lines;
1712 }
1713
1714 void
1715 gtk_text_view_set_pixels_inside_wrap (GtkTextView *text_view,
1716                                       gint         pixels_inside_wrap)
1717 {
1718   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1719
1720   if (text_view->pixels_inside_wrap != pixels_inside_wrap)
1721     {
1722       text_view->pixels_inside_wrap = pixels_inside_wrap;
1723
1724       if (text_view->layout)
1725         {
1726           text_view->layout->default_style->pixels_inside_wrap = pixels_inside_wrap;
1727           gtk_text_layout_default_style_changed (text_view->layout);
1728         }
1729     }
1730 }
1731
1732 gint
1733 gtk_text_view_get_pixels_inside_wrap (GtkTextView *text_view)
1734 {
1735   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1736
1737   return text_view->pixels_inside_wrap;
1738 }
1739
1740 void
1741 gtk_text_view_set_justification (GtkTextView     *text_view,
1742                                  GtkJustification justify)
1743 {
1744   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1745
1746   if (text_view->justify != justify)
1747     {
1748       text_view->justify = justify;
1749
1750       if (text_view->layout)
1751         {
1752           text_view->layout->default_style->justification = justify;
1753           gtk_text_layout_default_style_changed (text_view->layout);
1754         }
1755     }
1756 }
1757
1758 GtkJustification
1759 gtk_text_view_get_justification (GtkTextView *text_view)
1760 {
1761   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_JUSTIFY_LEFT);
1762
1763   return text_view->justify;
1764 }
1765
1766 void
1767 gtk_text_view_set_left_margin (GtkTextView *text_view,
1768                                gint         left_margin)
1769 {
1770   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1771
1772   if (text_view->left_margin != left_margin)
1773     {
1774       text_view->left_margin = left_margin;
1775
1776       if (text_view->layout)
1777         {
1778           text_view->layout->default_style->left_margin = left_margin;
1779           gtk_text_layout_default_style_changed (text_view->layout);
1780         }
1781     }
1782 }
1783
1784 gint
1785 gtk_text_view_get_left_margin (GtkTextView *text_view)
1786 {
1787   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1788
1789   return text_view->left_margin;
1790 }
1791
1792 void
1793 gtk_text_view_set_right_margin (GtkTextView *text_view,
1794                                 gint         right_margin)
1795 {
1796   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1797
1798   if (text_view->right_margin != right_margin)
1799     {
1800       text_view->right_margin = right_margin;
1801
1802       if (text_view->layout)
1803         {
1804           text_view->layout->default_style->right_margin = right_margin;
1805           gtk_text_layout_default_style_changed (text_view->layout);
1806         }
1807     }
1808 }
1809
1810 gint
1811 gtk_text_view_get_right_margin (GtkTextView *text_view)
1812 {
1813   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1814
1815   return text_view->right_margin;
1816 }
1817
1818 void
1819 gtk_text_view_set_indent (GtkTextView *text_view,
1820                           gint         indent)
1821 {
1822   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1823
1824   if (text_view->indent != indent)
1825     {
1826       text_view->indent = indent;
1827
1828       if (text_view->layout)
1829         {
1830           text_view->layout->default_style->indent = indent;
1831           gtk_text_layout_default_style_changed (text_view->layout);
1832         }
1833     }
1834 }
1835
1836 gint
1837 gtk_text_view_get_indent (GtkTextView *text_view)
1838 {
1839   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1840
1841   return text_view->indent;
1842 }
1843
1844 void
1845 gtk_text_view_set_tabs (GtkTextView   *text_view,
1846                         PangoTabArray *tabs)
1847 {
1848   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1849
1850   if (text_view->tabs)
1851     pango_tab_array_free (text_view->tabs);
1852
1853   text_view->tabs = tabs ? pango_tab_array_copy (tabs) : NULL;
1854
1855   if (text_view->layout)
1856     {
1857       /* some unkosher futzing in internal struct details... */
1858       if (text_view->layout->default_style->tabs)
1859         pango_tab_array_free (text_view->layout->default_style->tabs);
1860
1861       text_view->layout->default_style->tabs =
1862         text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
1863
1864       gtk_text_layout_default_style_changed (text_view->layout);
1865     }
1866 }
1867
1868 PangoTabArray*
1869 gtk_text_view_get_tabs (GtkTextView *text_view)
1870 {
1871   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
1872
1873   return text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
1874 }
1875
1876 /**
1877  * gtk_text_view_set_cursor_visible:
1878  * @text_view: a #GtkTextView
1879  * @setting: whether to show the insertion cursor
1880  *
1881  * Toggles whether the insertion point is displayed. A buffer with no editable
1882  * text probably shouldn't have a visible cursor, so you may want to turn
1883  * the cursor off.
1884  **/
1885 void
1886 gtk_text_view_set_cursor_visible    (GtkTextView   *text_view,
1887                                      gboolean       setting)
1888 {
1889   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1890
1891   setting = (setting != FALSE);
1892
1893   if (text_view->cursor_visible != setting)
1894     {
1895       text_view->cursor_visible = setting;
1896
1897       if (GTK_WIDGET_HAS_FOCUS (text_view))
1898         {
1899           if (text_view->layout)
1900             {
1901               gtk_text_layout_set_cursor_visible (text_view->layout, setting);
1902
1903               if (setting)
1904                 gtk_text_view_start_cursor_blink (text_view, FALSE);
1905               else
1906                 gtk_text_view_stop_cursor_blink (text_view);
1907             }
1908         }
1909     }
1910 }
1911
1912 /**
1913  * gtk_text_view_get_cursor_visible:
1914  * @text_view: a #GtkTextView
1915  *
1916  * Find out whether the cursor is being displayed.
1917  *
1918  * Return value: whether the insertion mark is visible
1919  **/
1920 gboolean
1921 gtk_text_view_get_cursor_visible    (GtkTextView   *text_view)
1922 {
1923   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1924
1925   return text_view->cursor_visible;
1926 }
1927
1928
1929 /**
1930  * gtk_text_view_place_cursor_onscreen:
1931  * @text_view: a #GtkTextView
1932  *
1933  * Moves the cursor to the currently visible region of the
1934  * buffer, it it isn't there already.
1935  *
1936  * Return value: TRUE if the cursor had to be moved.
1937  **/
1938 gboolean
1939 gtk_text_view_place_cursor_onscreen (GtkTextView *text_view)
1940 {
1941   GtkTextIter insert;
1942
1943   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1944
1945   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
1946                                     gtk_text_buffer_get_mark (get_buffer (text_view),
1947                                                               "insert"));
1948
1949   if (clamp_iter_onscreen (text_view, &insert))
1950     {
1951       gtk_text_buffer_place_cursor (get_buffer (text_view), &insert);
1952       return TRUE;
1953     }
1954   else
1955     return FALSE;
1956 }
1957
1958 static void
1959 gtk_text_view_destroy (GtkObject *object)
1960 {
1961   GtkTextView *text_view;
1962   GtkTextLayout *layout;
1963
1964   text_view = GTK_TEXT_VIEW (object);
1965
1966   layout = text_view->layout;
1967
1968   gtk_text_view_destroy_layout (text_view);
1969   gtk_text_view_set_buffer (text_view, NULL);
1970
1971   (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
1972 }
1973
1974 static void
1975 gtk_text_view_finalize (GObject *object)
1976 {
1977   GtkTextView *text_view;
1978
1979   text_view = GTK_TEXT_VIEW (object);
1980
1981   g_return_if_fail (text_view->buffer == NULL);
1982
1983   gtk_text_view_destroy_layout (text_view);
1984   gtk_text_view_set_buffer (text_view, NULL);
1985
1986   if (text_view->pending_scroll)
1987     {
1988       free_pending_scroll (text_view->pending_scroll);
1989       text_view->pending_scroll = NULL;
1990     }
1991
1992   if (text_view->hadjustment)
1993     g_object_unref (G_OBJECT (text_view->hadjustment));
1994   if (text_view->vadjustment)
1995     g_object_unref (G_OBJECT (text_view->vadjustment));
1996
1997   text_window_free (text_view->text_window);
1998
1999   if (text_view->left_window)
2000     text_window_free (text_view->left_window);
2001
2002   if (text_view->top_window)
2003     text_window_free (text_view->top_window);
2004
2005   if (text_view->right_window)
2006     text_window_free (text_view->right_window);
2007
2008   if (text_view->bottom_window)
2009     text_window_free (text_view->bottom_window);
2010
2011   g_object_unref (G_OBJECT (text_view->im_context));
2012
2013   (* G_OBJECT_CLASS (parent_class)->finalize) (object);
2014 }
2015
2016 static void
2017 gtk_text_view_set_arg (GtkObject *object, GtkArg *arg, guint arg_id)
2018 {
2019   GtkTextView *text_view;
2020
2021   text_view = GTK_TEXT_VIEW (object);
2022
2023   switch (arg_id)
2024     {
2025     case ARG_HEIGHT_LINES:
2026       g_warning ("FIXME");
2027       break;
2028
2029     case ARG_WIDTH_COLUMNS:
2030       g_warning ("FIXME");
2031       break;
2032
2033     case ARG_PIXELS_ABOVE_LINES:
2034       gtk_text_view_set_pixels_above_lines (text_view, GTK_VALUE_INT (*arg));
2035       break;
2036
2037     case ARG_PIXELS_BELOW_LINES:
2038       gtk_text_view_set_pixels_below_lines (text_view, GTK_VALUE_INT (*arg));
2039       break;
2040
2041     case ARG_PIXELS_INSIDE_WRAP:
2042       gtk_text_view_set_pixels_inside_wrap (text_view, GTK_VALUE_INT (*arg));
2043       break;
2044
2045     case ARG_EDITABLE:
2046       gtk_text_view_set_editable (text_view, GTK_VALUE_BOOL (*arg));
2047       break;
2048
2049     case ARG_WRAP_MODE:
2050       gtk_text_view_set_wrap_mode (text_view, GTK_VALUE_ENUM (*arg));
2051       break;
2052
2053     case ARG_JUSTIFY:
2054       gtk_text_view_set_justification (text_view, GTK_VALUE_ENUM (*arg));
2055       break;
2056
2057     case ARG_LEFT_MARGIN:
2058       gtk_text_view_set_left_margin (text_view, GTK_VALUE_INT (*arg));
2059       break;
2060
2061     case ARG_RIGHT_MARGIN:
2062       gtk_text_view_set_right_margin (text_view, GTK_VALUE_INT (*arg));
2063       break;
2064
2065     case ARG_INDENT:
2066       gtk_text_view_set_indent (text_view, GTK_VALUE_INT (*arg));
2067       break;
2068
2069     case ARG_TABS:
2070       gtk_text_view_set_tabs (text_view, GTK_VALUE_POINTER (*arg));
2071       break;
2072
2073     default:
2074       g_assert_not_reached ();
2075       break;
2076     }
2077 }
2078
2079 static void
2080 gtk_text_view_get_arg (GtkObject *object, GtkArg *arg, guint arg_id)
2081 {
2082   GtkTextView *text_view;
2083
2084   text_view = GTK_TEXT_VIEW (object);
2085
2086   switch (arg_id)
2087     {
2088     case ARG_HEIGHT_LINES:
2089       g_warning ("FIXME");
2090       break;
2091
2092     case ARG_WIDTH_COLUMNS:
2093       g_warning ("FIXME");
2094       break;
2095
2096     case ARG_PIXELS_ABOVE_LINES:
2097       GTK_VALUE_INT (*arg) = text_view->pixels_above_lines;
2098       break;
2099
2100     case ARG_PIXELS_BELOW_LINES:
2101       GTK_VALUE_INT (*arg) = text_view->pixels_below_lines;
2102       break;
2103
2104     case ARG_PIXELS_INSIDE_WRAP:
2105       GTK_VALUE_INT (*arg) = text_view->pixels_inside_wrap;
2106       break;
2107
2108     case ARG_EDITABLE:
2109       GTK_VALUE_BOOL (*arg) = text_view->editable;
2110       break;
2111
2112     case ARG_WRAP_MODE:
2113       GTK_VALUE_ENUM (*arg) = text_view->wrap_mode;
2114       break;
2115
2116     case ARG_JUSTIFY:
2117       GTK_VALUE_ENUM (*arg) = text_view->justify;
2118       break;
2119
2120     case ARG_LEFT_MARGIN:
2121       GTK_VALUE_INT (*arg) = text_view->left_margin;
2122       break;
2123
2124     case ARG_RIGHT_MARGIN:
2125       GTK_VALUE_INT (*arg) = text_view->right_margin;
2126       break;
2127
2128     case ARG_INDENT:
2129       GTK_VALUE_INT (*arg) = text_view->indent;
2130       break;
2131
2132     case ARG_TABS:
2133       GTK_VALUE_POINTER (*arg) = gtk_text_view_get_tabs (text_view);
2134       break;
2135
2136     default:
2137       arg->type = GTK_TYPE_INVALID;
2138       break;
2139     }
2140 }
2141
2142 static void
2143 gtk_text_view_size_request (GtkWidget      *widget,
2144                             GtkRequisition *requisition)
2145 {
2146   GtkTextView *text_view;
2147   GSList *tmp_list;
2148
2149   text_view = GTK_TEXT_VIEW (widget);
2150
2151   requisition->width = text_view->text_window->requisition.width + FOCUS_EDGE_WIDTH * 2;
2152   requisition->height = text_view->text_window->requisition.height + FOCUS_EDGE_WIDTH * 2;
2153
2154   if (text_view->left_window)
2155     requisition->width += text_view->left_window->requisition.width;
2156
2157   if (text_view->right_window)
2158     requisition->width += text_view->right_window->requisition.width;
2159
2160   if (text_view->top_window)
2161     requisition->height += text_view->top_window->requisition.height;
2162
2163   if (text_view->bottom_window)
2164     requisition->height += text_view->bottom_window->requisition.height;
2165
2166   tmp_list = text_view->children;
2167   while (tmp_list != NULL)
2168     {
2169       GtkTextViewChild *child = tmp_list->data;
2170
2171       if (child->anchor)
2172         {
2173           GtkRequisition child_req;
2174           GtkRequisition old_req;
2175
2176           old_req = child->widget->requisition;
2177
2178           gtk_widget_size_request (child->widget, &child_req);
2179
2180           if (text_view->layout &&
2181               (old_req.width != child_req.width ||
2182                old_req.height != child_req.height))
2183             gtk_text_child_anchor_queue_resize (child->anchor,
2184                                                 text_view->layout);
2185         }
2186       else
2187         {
2188
2189         }
2190
2191       tmp_list = g_slist_next (tmp_list);
2192     }
2193 }
2194
2195 static void
2196 gtk_text_view_update_child_allocation (GtkTextView      *text_view,
2197                                        GtkTextViewChild *vc)
2198 {
2199   gint buffer_y;
2200   GtkTextIter iter;
2201   GtkAllocation allocation;
2202
2203   gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
2204                                             &iter,
2205                                             vc->anchor);
2206
2207   gtk_text_layout_get_line_yrange (text_view->layout, &iter,
2208                                    &buffer_y, NULL);
2209
2210   buffer_y += vc->from_top_of_line;
2211
2212   allocation.x = vc->from_left_of_buffer;
2213   allocation.y = buffer_y;
2214   allocation.width = vc->widget->requisition.width;
2215   allocation.height = vc->widget->requisition.height;
2216
2217   gtk_widget_size_allocate (vc->widget, &allocation);
2218 }
2219
2220 static void
2221 gtk_text_view_child_allocated (GtkTextLayout *layout,
2222                                GtkWidget     *child,
2223                                gint           x,
2224                                gint           y,
2225                                gpointer       data)
2226 {
2227   GtkTextViewChild *vc = NULL;
2228   GtkTextView *text_view = data;
2229
2230   /* x,y is the position of the child from the top of the line, and
2231    * from the left of the buffer. We have to translate that into text
2232    * window coordinates, then size_allocate the child.
2233    */
2234
2235   vc = g_object_get_data (G_OBJECT (child),
2236                             "gtk-text-view-child");
2237
2238   g_assert (vc != NULL);
2239
2240   g_print ("child allocated at %d,%d\n", x, y);
2241
2242   vc->from_left_of_buffer = x;
2243   vc->from_top_of_line = y;
2244
2245   gtk_text_view_update_child_allocation (text_view, vc);
2246 }
2247
2248 static void
2249 gtk_text_view_validate_children (GtkTextView *text_view)
2250 {
2251   GSList *tmp_list;
2252
2253   DV(g_print(G_STRLOC"\n"));
2254
2255   tmp_list = text_view->children;
2256   while (tmp_list != NULL)
2257     {
2258       GtkTextViewChild *child = tmp_list->data;
2259
2260       if (child->anchor)
2261         {
2262           /* We need to force-validate the regions containing
2263            * children.
2264            */
2265           GtkTextIter child_loc;
2266           gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
2267                                                     &child_loc,
2268                                                     child->anchor);
2269
2270           gtk_text_layout_validate_yrange (text_view->layout,
2271                                            &child_loc,
2272                                            0, 1);
2273         }
2274       else
2275         {
2276
2277         }
2278
2279       tmp_list = g_slist_next (tmp_list);
2280     }
2281 }
2282
2283 static void
2284 gtk_text_view_size_allocate (GtkWidget *widget,
2285                              GtkAllocation *allocation)
2286 {
2287   GtkTextView *text_view;
2288   GtkTextIter first_para;
2289   gint y;
2290   GtkAdjustment *vadj;
2291   gboolean yoffset_changed = FALSE;
2292   gint width, height;
2293   GdkRectangle text_rect;
2294   GdkRectangle left_rect;
2295   GdkRectangle right_rect;
2296   GdkRectangle top_rect;
2297   GdkRectangle bottom_rect;
2298
2299   text_view = GTK_TEXT_VIEW (widget);
2300
2301   DV(g_print(G_STRLOC"\n"));
2302
2303   widget->allocation = *allocation;
2304
2305   if (GTK_WIDGET_REALIZED (widget))
2306     {
2307       gdk_window_move_resize (widget->window,
2308                               allocation->x, allocation->y,
2309                               allocation->width, allocation->height);
2310     }
2311
2312   /* distribute width/height among child windows. Ensure all
2313    * windows get at least a 1x1 allocation.
2314    */
2315
2316   width = allocation->width - FOCUS_EDGE_WIDTH * 2;
2317
2318   if (text_view->left_window)
2319     left_rect.width = text_view->left_window->requisition.width;
2320   else
2321     left_rect.width = 1;
2322
2323   width -= left_rect.width;
2324
2325   if (text_view->right_window)
2326     right_rect.width = text_view->right_window->requisition.width;
2327   else
2328     right_rect.width = 1;
2329
2330   width -= right_rect.width;
2331
2332   text_rect.width = MAX (1, width);
2333
2334   top_rect.width = text_rect.width;
2335   bottom_rect.width = text_rect.width;
2336
2337
2338   height = allocation->height - FOCUS_EDGE_WIDTH * 2;
2339
2340   if (text_view->top_window)
2341     top_rect.height = text_view->top_window->requisition.height;
2342   else
2343     top_rect.height = 1;
2344
2345   height -= top_rect.height;
2346
2347   if (text_view->bottom_window)
2348     bottom_rect.height = text_view->bottom_window->requisition.height;
2349   else
2350     bottom_rect.height = 1;
2351
2352   height -= bottom_rect.height;
2353
2354   text_rect.height = MAX (1, height);
2355
2356   left_rect.height = text_rect.height;
2357   right_rect.height = text_rect.height;
2358
2359   /* Origins */
2360   left_rect.x = FOCUS_EDGE_WIDTH;
2361   top_rect.y = FOCUS_EDGE_WIDTH;
2362
2363   text_rect.x = left_rect.x + left_rect.width;
2364   text_rect.y = top_rect.y + top_rect.height;
2365
2366   left_rect.y = text_rect.y;
2367   right_rect.y = text_rect.y;
2368
2369   top_rect.x = text_rect.x;
2370   bottom_rect.x = text_rect.x;
2371
2372   right_rect.x = text_rect.x + text_rect.width;
2373   bottom_rect.y = text_rect.y + text_rect.height;
2374
2375   text_window_size_allocate (text_view->text_window,
2376                              &text_rect);
2377
2378   if (text_view->left_window)
2379     text_window_size_allocate (text_view->left_window,
2380                                &left_rect);
2381
2382   if (text_view->right_window)
2383     text_window_size_allocate (text_view->right_window,
2384                                &right_rect);
2385
2386   if (text_view->top_window)
2387     text_window_size_allocate (text_view->top_window,
2388                                &top_rect);
2389
2390   if (text_view->bottom_window)
2391     text_window_size_allocate (text_view->bottom_window,
2392                                &bottom_rect);
2393
2394   gtk_text_view_update_layout_width (text_view);
2395
2396   /* This is because validating children ends up size allocating them. */
2397   gtk_text_view_validate_children (text_view);
2398
2399   /* Now adjust the value of the adjustment to keep the cursor at the
2400    * same place in the buffer
2401    */
2402   gtk_text_view_get_first_para_iter (text_view, &first_para);
2403   gtk_text_layout_get_line_yrange (text_view->layout, &first_para, &y, NULL);
2404
2405   y += text_view->first_para_pixels;
2406
2407   /* Ensure h/v adj exist */
2408   get_hadjustment (text_view);
2409   get_vadjustment (text_view);
2410
2411   vadj = text_view->vadjustment;
2412   if (y > vadj->upper - vadj->page_size)
2413     y = MAX (0, vadj->upper - vadj->page_size);
2414
2415   if (y != text_view->yoffset)
2416     {
2417       vadj->value = text_view->yoffset = y;
2418       yoffset_changed = TRUE;
2419     }
2420
2421   text_view->hadjustment->page_size = SCREEN_WIDTH (text_view);
2422   text_view->hadjustment->page_increment = SCREEN_WIDTH (text_view) / 2;
2423   text_view->hadjustment->lower = 0;
2424   text_view->hadjustment->upper = MAX (SCREEN_WIDTH (text_view),
2425                                        text_view->width);
2426   gtk_signal_emit_by_name (GTK_OBJECT (text_view->hadjustment), "changed");
2427
2428   text_view->vadjustment->page_size = SCREEN_HEIGHT (text_view);
2429   text_view->vadjustment->page_increment = SCREEN_HEIGHT (text_view) / 2;
2430   text_view->vadjustment->lower = 0;
2431   text_view->vadjustment->upper = MAX (SCREEN_HEIGHT (text_view),
2432                                        text_view->height);
2433   gtk_signal_emit_by_name (GTK_OBJECT (text_view->vadjustment), "changed");
2434
2435   if (yoffset_changed)
2436     gtk_adjustment_value_changed (vadj);
2437
2438   if (text_view->first_validate_idle != 0)
2439     {
2440       /* The GTK resize loop processes all the pending exposes right
2441        * after doing the resize stuff, so the idle sizer won't have a
2442        * chance to run. So we do the work here.
2443        */
2444
2445       g_source_remove (text_view->first_validate_idle);
2446       text_view->first_validate_idle = 0;
2447
2448       if (!gtk_text_view_flush_scroll (text_view))
2449         gtk_text_view_validate_onscreen (text_view);
2450     }
2451 }
2452
2453 static void
2454 gtk_text_view_get_first_para_iter (GtkTextView *text_view,
2455                                    GtkTextIter *iter)
2456 {
2457   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), iter,
2458                                     text_view->first_para_mark);
2459 }
2460
2461 static void
2462 gtk_text_view_validate_onscreen (GtkTextView *text_view)
2463 {
2464   GtkWidget *widget = GTK_WIDGET (text_view);
2465
2466   DV(g_print(">Validating onscreen ("G_STRLOC")\n"));
2467
2468   if (SCREEN_HEIGHT (widget) > 0)
2469     {
2470       GtkTextIter first_para;
2471
2472       /* Be sure we've validated the stuff onscreen; if we
2473        * scrolled, these calls won't have any effect, because
2474        * they were called in the recursive validate_onscreen
2475        */
2476       gtk_text_view_get_first_para_iter (text_view, &first_para);
2477
2478       gtk_text_layout_validate_yrange (text_view->layout,
2479                                        &first_para,
2480                                        0,
2481                                        text_view->first_para_pixels +
2482                                        SCREEN_HEIGHT (widget));
2483     }
2484
2485   text_view->onscreen_validated = TRUE;
2486
2487   DV(g_print(">Done validating onscreen, onscreen_validated = TRUE ("G_STRLOC")\n"));
2488
2489   /* This can have the odd side effect of triggering a scroll, which should
2490    * flip "onscreen_validated" back to FALSE, but should also get us
2491    * back into this function to turn it on again.
2492    */
2493   gtk_text_view_update_adjustments (text_view);
2494
2495   g_assert (text_view->onscreen_validated);
2496 }
2497
2498 static gboolean
2499 first_validate_callback (gpointer data)
2500 {
2501   GtkTextView *text_view = data;
2502
2503   /* Note that some of this code is duplicated at the end of size_allocate,
2504    * keep in sync with that.
2505    */
2506
2507   DV(g_print(G_STRLOC"\n"));
2508
2509   /* Do this first, which means that if an "invalidate"
2510    * occurs during any of this process, a new first_validate_callback
2511    * will be installed, and we'll start again.
2512    */
2513   text_view->first_validate_idle = 0;
2514
2515   /* be sure we have up-to-date screen size set on the
2516    * layout.
2517    */
2518   gtk_text_view_update_layout_width (text_view);
2519
2520   /* Bail out if we invalidated stuff; scrolling right away will just
2521    * confuse the issue.
2522    */
2523   if (text_view->first_validate_idle != 0)
2524     {
2525       DV(g_print(">Width change forced requeue ("G_STRLOC")\n"));
2526       return FALSE;
2527     }
2528
2529   /* scroll to any marks, if that's pending. This can
2530    * jump us to the validation codepath used for scrolling
2531    * onscreen, if so we bail out.
2532    */
2533   if (!gtk_text_view_flush_scroll (text_view))
2534     gtk_text_view_validate_onscreen (text_view);
2535
2536   DV(g_print(">Leaving first validate idle ("G_STRLOC")\n"));
2537
2538   g_assert (text_view->onscreen_validated);
2539
2540   return FALSE;
2541 }
2542
2543 static gboolean
2544 incremental_validate_callback (gpointer data)
2545 {
2546   GtkTextView *text_view = data;
2547
2548   DV(g_print(G_STRLOC"\n"));
2549
2550   gtk_text_layout_validate (text_view->layout, 2000);
2551
2552   gtk_text_view_update_adjustments (text_view);
2553
2554   if (gtk_text_layout_is_valid (text_view->layout))
2555     {
2556       text_view->incremental_validate_idle = 0;
2557       return FALSE;
2558     }
2559   else
2560     return TRUE;
2561 }
2562
2563 static void
2564 invalidated_handler (GtkTextLayout *layout,
2565                      gpointer       data)
2566 {
2567   GtkTextView *text_view;
2568
2569   text_view = GTK_TEXT_VIEW (data);
2570
2571   text_view->onscreen_validated = FALSE;
2572
2573   DV(g_print(">Invalidate, onscreen_validated = FALSE ("G_STRLOC")\n"));
2574
2575   if (!text_view->first_validate_idle)
2576     text_view->first_validate_idle = g_idle_add_full (GTK_PRIORITY_RESIZE - 1, first_validate_callback, text_view, NULL);
2577
2578   if (!text_view->incremental_validate_idle)
2579     text_view->incremental_validate_idle = g_idle_add_full (GTK_TEXT_VIEW_PRIORITY_VALIDATE, incremental_validate_callback, text_view, NULL);
2580 }
2581
2582 static void
2583 changed_handler (GtkTextLayout *layout,
2584                  gint           start_y,
2585                  gint           old_height,
2586                  gint           new_height,
2587                  gpointer       data)
2588 {
2589   GtkTextView *text_view;
2590   GtkWidget *widget;
2591   GdkRectangle visible_rect;
2592   GdkRectangle redraw_rect;
2593
2594   text_view = GTK_TEXT_VIEW (data);
2595   widget = GTK_WIDGET (data);
2596
2597   DV(g_print(">Lines Validated ("G_STRLOC")\n"));
2598
2599   if (GTK_WIDGET_REALIZED (text_view))
2600     {
2601       gtk_text_view_get_visible_rect (text_view, &visible_rect);
2602
2603       redraw_rect.x = visible_rect.x;
2604       redraw_rect.width = visible_rect.width;
2605       redraw_rect.y = start_y;
2606
2607       if (old_height == new_height)
2608         redraw_rect.height = old_height;
2609       else
2610         redraw_rect.height = MAX (0, visible_rect.y + visible_rect.height - start_y);
2611
2612       if (gdk_rectangle_intersect (&redraw_rect, &visible_rect, &redraw_rect))
2613         {
2614           /* text_window_invalidate_rect() takes buffer coordinates */
2615           text_window_invalidate_rect (text_view->text_window,
2616                                        &redraw_rect);
2617
2618           DV(g_print(" invalidated rect: %d,%d %d x %d\n",
2619                      redraw_rect.x,
2620                      redraw_rect.y,
2621                      redraw_rect.width,
2622                      redraw_rect.height));
2623
2624           if (text_view->left_window)
2625             text_window_invalidate_rect (text_view->left_window,
2626                                          &redraw_rect);
2627           if (text_view->right_window)
2628             text_window_invalidate_rect (text_view->right_window,
2629                                          &redraw_rect);
2630           if (text_view->top_window)
2631             text_window_invalidate_rect (text_view->top_window,
2632                                          &redraw_rect);
2633           if (text_view->bottom_window)
2634             text_window_invalidate_rect (text_view->bottom_window,
2635                                          &redraw_rect);
2636         }
2637     }
2638
2639   if (old_height != new_height)
2640     {
2641       gboolean yoffset_changed = FALSE;
2642       GSList *tmp_list;
2643
2644       if (start_y + old_height <= text_view->yoffset - text_view->first_para_pixels)
2645         {
2646           text_view->yoffset += new_height - old_height;
2647           get_vadjustment (text_view)->value = text_view->yoffset;
2648           yoffset_changed = TRUE;
2649         }
2650
2651       if (yoffset_changed)
2652         gtk_adjustment_value_changed (get_vadjustment (text_view));
2653
2654       /* FIXME be smarter about which anchored widgets we update */
2655
2656       tmp_list = text_view->children;
2657       while (tmp_list != NULL)
2658         {
2659           GtkTextViewChild *child = tmp_list->data;
2660
2661           if (child->anchor)
2662             gtk_text_view_update_child_allocation (text_view, child);
2663
2664           tmp_list = g_slist_next (tmp_list);
2665         }
2666     }
2667 }
2668
2669 static void
2670 gtk_text_view_realize (GtkWidget *widget)
2671 {
2672   GtkTextView *text_view;
2673   GdkWindowAttr attributes;
2674   gint attributes_mask;
2675
2676   text_view = GTK_TEXT_VIEW (widget);
2677   GTK_WIDGET_SET_FLAGS (text_view, GTK_REALIZED);
2678
2679   attributes.window_type = GDK_WINDOW_CHILD;
2680   attributes.x = widget->allocation.x;
2681   attributes.y = widget->allocation.y;
2682   attributes.width = widget->allocation.width;
2683   attributes.height = widget->allocation.height;
2684   attributes.wclass = GDK_INPUT_OUTPUT;
2685   attributes.visual = gtk_widget_get_visual (widget);
2686   attributes.colormap = gtk_widget_get_colormap (widget);
2687   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK | GDK_EXPOSURE_MASK;
2688
2689   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
2690
2691   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
2692                                    &attributes, attributes_mask);
2693   gdk_window_set_user_data (widget->window, widget);
2694
2695   /* must come before text_window_realize calls */
2696   widget->style = gtk_style_attach (widget->style, widget->window);
2697
2698   gdk_window_set_background (widget->window,
2699                              &widget->style->bg[GTK_WIDGET_STATE (widget)]);
2700
2701   text_window_realize (text_view->text_window, widget->window);
2702
2703   if (text_view->left_window)
2704     text_window_realize (text_view->left_window,
2705                          widget->window);
2706
2707   if (text_view->top_window)
2708     text_window_realize (text_view->top_window,
2709                          widget->window);
2710
2711   if (text_view->right_window)
2712     text_window_realize (text_view->right_window,
2713                          widget->window);
2714
2715   if (text_view->bottom_window)
2716     text_window_realize (text_view->bottom_window,
2717                          widget->window);
2718
2719   gtk_text_view_ensure_layout (text_view);
2720 }
2721
2722 static void
2723 gtk_text_view_unrealize (GtkWidget *widget)
2724 {
2725   GtkTextView *text_view;
2726
2727   text_view = GTK_TEXT_VIEW (widget);
2728
2729   if (text_view->first_validate_idle)
2730     {
2731       g_source_remove (text_view->first_validate_idle);
2732       text_view->first_validate_idle = 0;
2733     }
2734
2735   if (text_view->incremental_validate_idle)
2736     {
2737       g_source_remove (text_view->incremental_validate_idle);
2738       text_view->incremental_validate_idle = 0;
2739     }
2740
2741   if (text_view->popup_menu)
2742     {
2743       gtk_widget_destroy (text_view->popup_menu);
2744       text_view->popup_menu = NULL;
2745     }
2746
2747   text_window_unrealize (text_view->text_window);
2748
2749   if (text_view->left_window)
2750     text_window_unrealize (text_view->left_window);
2751
2752   if (text_view->top_window)
2753     text_window_unrealize (text_view->top_window);
2754
2755   if (text_view->right_window)
2756     text_window_unrealize (text_view->right_window);
2757
2758   if (text_view->bottom_window)
2759     text_window_unrealize (text_view->bottom_window);
2760
2761   gtk_text_view_destroy_layout (text_view);
2762
2763   (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
2764 }
2765
2766 static void
2767 gtk_text_view_style_set (GtkWidget *widget,
2768                          GtkStyle  *previous_style)
2769 {
2770   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
2771
2772   if (GTK_WIDGET_REALIZED (widget))
2773     {
2774       gdk_window_set_background (widget->window,
2775                                  &widget->style->bg[GTK_WIDGET_STATE (widget)]);
2776
2777       gdk_window_set_background (text_view->text_window->bin_window,
2778                                  &widget->style->base[GTK_WIDGET_STATE (widget)]);
2779
2780       if (text_view->left_window)
2781         gdk_window_set_background (text_view->left_window->bin_window,
2782                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
2783       if (text_view->right_window)
2784         gdk_window_set_background (text_view->right_window->bin_window,
2785                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
2786
2787       if (text_view->top_window)
2788         gdk_window_set_background (text_view->top_window->bin_window,
2789                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
2790
2791       if (text_view->bottom_window)
2792         gdk_window_set_background (text_view->bottom_window->bin_window,
2793                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
2794
2795       gtk_text_view_set_attributes_from_style (text_view,
2796                                                text_view->layout->default_style,
2797                                                widget->style);
2798       gtk_text_layout_default_style_changed (text_view->layout);
2799     }
2800 }
2801
2802 static void
2803 gtk_text_view_direction_changed (GtkWidget        *widget,
2804                                  GtkTextDirection  previous_direction)
2805 {
2806   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
2807
2808   if (text_view->layout)
2809     {
2810       text_view->layout->default_style->direction = gtk_widget_get_direction (widget);
2811       gtk_text_layout_default_style_changed (text_view->layout);
2812     }
2813 }
2814
2815 /*
2816  * Events
2817  */
2818
2819 static gboolean
2820 get_event_coordinates (GdkEvent *event, gint *x, gint *y)
2821 {
2822   if (event)
2823     switch (event->type)
2824       {
2825       case GDK_MOTION_NOTIFY:
2826         *x = event->motion.x;
2827         *y = event->motion.y;
2828         return TRUE;
2829         break;
2830
2831       case GDK_BUTTON_PRESS:
2832       case GDK_2BUTTON_PRESS:
2833       case GDK_3BUTTON_PRESS:
2834       case GDK_BUTTON_RELEASE:
2835         *x = event->button.x;
2836         *y = event->button.y;
2837         return TRUE;
2838         break;
2839
2840       case GDK_KEY_PRESS:
2841       case GDK_KEY_RELEASE:
2842       case GDK_ENTER_NOTIFY:
2843       case GDK_LEAVE_NOTIFY:
2844       case GDK_PROPERTY_NOTIFY:
2845       case GDK_SELECTION_CLEAR:
2846       case GDK_SELECTION_REQUEST:
2847       case GDK_SELECTION_NOTIFY:
2848       case GDK_PROXIMITY_IN:
2849       case GDK_PROXIMITY_OUT:
2850       case GDK_DRAG_ENTER:
2851       case GDK_DRAG_LEAVE:
2852       case GDK_DRAG_MOTION:
2853       case GDK_DRAG_STATUS:
2854       case GDK_DROP_START:
2855       case GDK_DROP_FINISHED:
2856       default:
2857         return FALSE;
2858         break;
2859       }
2860
2861   return FALSE;
2862 }
2863
2864 static gint
2865 emit_event_on_tags (GtkWidget   *widget,
2866                     GdkEvent    *event,
2867                     GtkTextIter *iter)
2868 {
2869   GSList *tags;
2870   GSList *tmp;
2871   gboolean retval = FALSE;
2872   GtkTextView *text_view;
2873
2874   text_view = GTK_TEXT_VIEW (widget);
2875
2876   tags = gtk_text_iter_get_tags (iter);
2877
2878   tmp = tags;
2879   while (tmp != NULL)
2880     {
2881       GtkTextTag *tag = tmp->data;
2882
2883       if (gtk_text_tag_event (tag, G_OBJECT (widget), event, iter))
2884         {
2885           retval = TRUE;
2886           break;
2887         }
2888
2889       tmp = g_slist_next (tmp);
2890     }
2891
2892   g_slist_free (tags);
2893
2894   return retval;
2895 }
2896
2897 static gint
2898 gtk_text_view_event (GtkWidget *widget, GdkEvent *event)
2899 {
2900   GtkTextView *text_view;
2901   gint x = 0, y = 0;
2902
2903   text_view = GTK_TEXT_VIEW (widget);
2904
2905   if (text_view->layout == NULL ||
2906       get_buffer (text_view) == NULL)
2907     return FALSE;
2908
2909   if (event->any.window != text_view->text_window->bin_window)
2910     return FALSE;
2911
2912   if (get_event_coordinates (event, &x, &y))
2913     {
2914       GtkTextIter iter;
2915
2916       x += text_view->xoffset;
2917       y += text_view->yoffset;
2918
2919       /* FIXME this is slow and we do it twice per event.
2920        * My favorite solution is to have GtkTextLayout cache
2921        * the last couple lookups.
2922        */
2923       gtk_text_layout_get_iter_at_pixel (text_view->layout,
2924                                          &iter,
2925                                          x, y);
2926
2927       return emit_event_on_tags (widget, event, &iter);
2928     }
2929   else if (event->type == GDK_KEY_PRESS ||
2930            event->type == GDK_KEY_RELEASE)
2931     {
2932       GtkTextMark *insert;
2933       GtkTextIter iter;
2934
2935       insert = gtk_text_buffer_get_mark (get_buffer (text_view),
2936                                          "insert");
2937
2938       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
2939
2940       return emit_event_on_tags (widget, event, &iter);
2941     }
2942   else
2943     return FALSE;
2944 }
2945
2946 static gint
2947 gtk_text_view_key_press_event (GtkWidget *widget, GdkEventKey *event)
2948 {
2949   gboolean retval = FALSE;
2950   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
2951
2952   if (text_view->layout == NULL ||
2953       get_buffer (text_view) == NULL)
2954     return FALSE;
2955
2956   if (gtk_im_context_filter_keypress (text_view->im_context, event))
2957     {
2958       text_view->need_im_reset = TRUE;
2959       retval = TRUE;
2960     }
2961   else if (GTK_WIDGET_CLASS (parent_class)->key_press_event &&
2962            GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, event))
2963     retval = TRUE;
2964   else if (event->keyval == GDK_Return ||
2965            event->keyval == GDK_KP_Enter)
2966     {
2967       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\n", 1,
2968                                                     text_view->editable);
2969       gtk_text_view_scroll_to_mark (text_view,
2970                                     gtk_text_buffer_get_mark (get_buffer (text_view),
2971                                                               "insert"),
2972                                     0.0, FALSE, 0.0, 0.0);
2973       retval = TRUE;
2974     }
2975   /* Pass through Tab as literal tab, unless Control is held down */
2976   else if (event->keyval == GDK_Tab && !(event->state & GDK_CONTROL_MASK))
2977     {
2978       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\t", 1,
2979                                                     text_view->editable);
2980       gtk_text_view_scroll_mark_onscreen (text_view,
2981                                           gtk_text_buffer_get_mark (get_buffer (text_view),
2982                                                                     "insert"));
2983       retval = TRUE;
2984     }
2985   else
2986     retval = FALSE;
2987
2988   gtk_text_view_start_cursor_blink (text_view, TRUE);
2989
2990   return retval;
2991 }
2992
2993 static gint
2994 gtk_text_view_key_release_event (GtkWidget *widget, GdkEventKey *event)
2995 {
2996   return FALSE;
2997 }
2998
2999 static gint
3000 gtk_text_view_button_press_event (GtkWidget *widget, GdkEventButton *event)
3001 {
3002   GtkTextView *text_view;
3003
3004   text_view = GTK_TEXT_VIEW (widget);
3005
3006   gtk_widget_grab_focus (widget);
3007
3008   if (event->window != text_view->text_window->bin_window)
3009     {
3010       /* Remove selection if any. */
3011       gtk_text_view_unselect (text_view);
3012       return FALSE;
3013     }
3014
3015 #if 0
3016   /* debug hack */
3017   if (event->button == 3 && (event->state & GDK_CONTROL_MASK) != 0)
3018     _gtk_text_buffer_spew (GTK_TEXT_VIEW (widget)->buffer);
3019   else if (event->button == 3)
3020     gtk_text_layout_spew (GTK_TEXT_VIEW (widget)->layout);
3021 #endif
3022
3023   if (event->type == GDK_BUTTON_PRESS)
3024     {
3025       gtk_text_view_reset_im_context (text_view);
3026
3027       if (event->button == 1)
3028         {
3029           /* If we're in the selection, start a drag copy/move of the
3030            * selection; otherwise, start creating a new selection.
3031            */
3032           GtkTextIter iter;
3033           GtkTextIter start, end;
3034
3035           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3036                                              &iter,
3037                                              event->x + text_view->xoffset,
3038                                              event->y + text_view->yoffset);
3039
3040           if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
3041                                                     &start, &end) &&
3042               gtk_text_iter_in_range (&iter, &start, &end))
3043             {
3044               text_view->drag_start_x = event->x;
3045               text_view->drag_start_y = event->y;
3046             }
3047           else
3048             {
3049               gtk_text_view_start_selection_drag (text_view, &iter, event);
3050             }
3051
3052           return TRUE;
3053         }
3054       else if (event->button == 2)
3055         {
3056           GtkTextIter iter;
3057
3058           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3059                                              &iter,
3060                                              event->x + text_view->xoffset,
3061                                              event->y + text_view->yoffset);
3062
3063           gtk_text_buffer_paste_primary (get_buffer (text_view),
3064                                          &iter,
3065                                          text_view->editable);
3066           return TRUE;
3067         }
3068       else if (event->button == 3)
3069         {
3070           gtk_text_view_do_popup (text_view, event);
3071         }
3072     }
3073   else if ((event->type == GDK_2BUTTON_PRESS ||
3074             event->type == GDK_3BUTTON_PRESS) &&
3075            event->button == 1)
3076     {
3077       GtkTextIter start, end;
3078
3079       /* End the selection drag, otherwise we'd clear the new
3080        * word/line selection on button release
3081        */
3082       gtk_text_view_end_selection_drag (text_view, event);
3083
3084       gtk_text_layout_get_iter_at_pixel (text_view->layout,
3085                                          &start,
3086                                          event->x + text_view->xoffset,
3087                                          event->y + text_view->yoffset);
3088
3089       end = start;
3090
3091       if (event->type == GDK_2BUTTON_PRESS)
3092         {
3093           if (gtk_text_iter_inside_word (&start))
3094             {
3095               if (!gtk_text_iter_starts_word (&start))
3096                 gtk_text_iter_backward_word_start (&start);
3097
3098               if (!gtk_text_iter_ends_word (&end))
3099                 gtk_text_iter_forward_word_end (&end);
3100             }
3101         }
3102       else if (event->type == GDK_3BUTTON_PRESS)
3103         {
3104           if (gtk_text_view_starts_display_line (text_view, &start))
3105             {
3106               /* If on a display line boundary, we assume the user
3107                * clicked off the end of a line and we therefore select
3108                * the line before the boundary.
3109                */
3110               gtk_text_view_backward_display_line_start (text_view, &start);
3111             }
3112           else
3113             {
3114               /* start isn't on the start of a line, so we move it to the
3115                * start, and move end to the end unless it's already there.
3116                */
3117               gtk_text_view_backward_display_line_start (text_view, &start);
3118
3119               if (!gtk_text_view_starts_display_line (text_view, &end))
3120                 gtk_text_view_forward_display_line_end (text_view, &end);
3121             }
3122         }
3123
3124       gtk_text_buffer_move_mark (get_buffer (text_view),
3125                                  gtk_text_buffer_get_selection_bound (get_buffer (text_view)),
3126                                  &start);
3127       gtk_text_buffer_move_mark (get_buffer (text_view),
3128                                  gtk_text_buffer_get_insert (get_buffer (text_view)),
3129                                  &end);
3130
3131       text_view->just_selected_element = TRUE;
3132
3133       return TRUE;
3134     }
3135
3136   return FALSE;
3137 }
3138
3139 static gint
3140 gtk_text_view_button_release_event (GtkWidget *widget, GdkEventButton *event)
3141 {
3142   GtkTextView *text_view;
3143
3144   text_view = GTK_TEXT_VIEW (widget);
3145
3146   if (event->window != text_view->text_window->bin_window)
3147     return FALSE;
3148
3149   if (event->button == 1)
3150     {
3151       if (text_view->drag_start_x >= 0)
3152         {
3153           text_view->drag_start_x = -1;
3154           text_view->drag_start_y = -1;
3155         }
3156
3157       if (gtk_text_view_end_selection_drag (GTK_TEXT_VIEW (widget), event))
3158         return TRUE;
3159       else if (text_view->just_selected_element)
3160         {
3161           text_view->just_selected_element = FALSE;
3162           return FALSE;
3163         }
3164       else
3165         {
3166           GtkTextIter iter;
3167
3168           /* Unselect everything; probably we were dragging, or clicked
3169            * without dragging to remove selection.
3170            */
3171           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3172                                              &iter,
3173                                              event->x + text_view->xoffset,
3174                                              event->y + text_view->yoffset);
3175
3176           gtk_text_buffer_place_cursor (get_buffer (text_view), &iter);
3177
3178           return FALSE;
3179         }
3180     }
3181
3182   return FALSE;
3183 }
3184
3185 static gint
3186 gtk_text_view_focus_in_event (GtkWidget *widget, GdkEventFocus *event)
3187 {
3188   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3189
3190   GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3191   gtk_widget_queue_draw (widget);
3192
3193   if (text_view->cursor_visible && text_view->layout)
3194     {
3195       gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3196       gtk_text_view_start_cursor_blink (text_view, FALSE);
3197     }
3198
3199   text_view->need_im_reset = TRUE;
3200   gtk_im_context_focus_in (GTK_TEXT_VIEW (widget)->im_context);
3201
3202   return FALSE;
3203 }
3204
3205 static gint
3206 gtk_text_view_focus_out_event (GtkWidget *widget, GdkEventFocus *event)
3207 {
3208   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3209
3210   GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3211   gtk_widget_queue_draw (widget);
3212
3213   if (text_view->cursor_visible && text_view->layout)
3214     {
3215       gtk_text_layout_set_cursor_visible (text_view->layout, FALSE);
3216       gtk_text_view_stop_cursor_blink (text_view);
3217     }
3218
3219   text_view->need_im_reset = TRUE;
3220   gtk_im_context_focus_out (GTK_TEXT_VIEW (widget)->im_context);
3221
3222   return FALSE;
3223 }
3224
3225 static gint
3226 gtk_text_view_motion_event (GtkWidget *widget, GdkEventMotion *event)
3227 {
3228   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
3229
3230   if (event->window == text_view->text_window->bin_window &&
3231       text_view->drag_start_x >= 0)
3232     {
3233       gint x, y;
3234
3235       gdk_window_get_pointer (text_view->text_window->bin_window,
3236                               &x, &y, NULL);
3237
3238       if (gtk_drag_check_threshold (widget,
3239                                     text_view->drag_start_x,
3240                                     text_view->drag_start_y,
3241                                     x, y))
3242         {
3243           GtkTextIter iter;
3244           gint buffer_x, buffer_y;
3245
3246           gtk_text_view_window_to_buffer_coords (text_view,
3247                                                  GTK_TEXT_WINDOW_TEXT,
3248                                                  text_view->drag_start_x,
3249                                                  text_view->drag_start_y,
3250                                                  &buffer_x,
3251                                                  &buffer_y);
3252
3253           gtk_text_layout_get_iter_at_pixel (text_view->layout,
3254                                              &iter,
3255                                              buffer_x, buffer_y);
3256
3257           gtk_text_view_start_selection_dnd (text_view, &iter, event);
3258           return TRUE;
3259         }
3260     }
3261
3262   return FALSE;
3263 }
3264
3265 static void
3266 gtk_text_view_paint (GtkWidget *widget, GdkRectangle *area)
3267 {
3268   GtkTextView *text_view;
3269
3270   text_view = GTK_TEXT_VIEW (widget);
3271
3272   g_return_if_fail (text_view->layout != NULL);
3273   g_return_if_fail (text_view->xoffset >= 0);
3274   g_return_if_fail (text_view->yoffset >= 0);
3275
3276   if (!text_view->onscreen_validated)
3277     {
3278       G_BREAKPOINT ();
3279       g_warning (G_STRLOC ": somehow some text lines were modified or scrolling occurred since the last validation of lines on the screen");
3280     }
3281
3282 #if 0
3283   printf ("painting %d,%d  %d x %d\n",
3284           area->x, area->y,
3285           area->width, area->height);
3286 #endif
3287
3288   gtk_text_layout_draw (text_view->layout,
3289                         widget,
3290                         text_view->text_window->bin_window,
3291                         text_view->xoffset,
3292                         text_view->yoffset,
3293                         area->x, area->y,
3294                         area->width, area->height);
3295 }
3296
3297 static gint
3298 gtk_text_view_expose_event (GtkWidget *widget, GdkEventExpose *event)
3299 {
3300 #if 0
3301   {
3302     GdkWindow *win = event->window;
3303     GdkColor color = { 0, 0, 0, 65535 };
3304     GdkGC *gc = gdk_gc_new (win);
3305     gdk_gc_set_rgb_fg_color (gc, &color);
3306     gdk_draw_rectangle (win,
3307                         gc, TRUE,
3308                         event->area.x, event->area.y,
3309                         event->area.width, event->area.height);
3310     gdk_gc_unref (gc);
3311   }
3312 #endif
3313
3314   if (event->window == gtk_text_view_get_window (GTK_TEXT_VIEW (widget),
3315                                                  GTK_TEXT_WINDOW_TEXT))
3316     {
3317       DV(g_print (">Exposed ("G_STRLOC")\n"));
3318       gtk_text_view_paint (widget, &event->area);
3319     }
3320
3321   if (event->window == widget->window)
3322     gtk_text_view_draw_focus (widget);
3323
3324   return TRUE;
3325 }
3326
3327 static void
3328 gtk_text_view_draw_focus (GtkWidget *widget)
3329 {
3330   if (GTK_WIDGET_DRAWABLE (widget))
3331     {
3332       if (GTK_WIDGET_HAS_FOCUS (widget))
3333         {
3334           gtk_paint_focus (widget->style, widget->window,
3335                            NULL, widget, "textview",
3336                            0, 0,
3337                            widget->allocation.width - 1,
3338                            widget->allocation.height - 1);
3339         }
3340       else
3341         {
3342           gdk_window_clear (widget->window);
3343         }
3344     }
3345 }
3346
3347 /*
3348  * Container
3349  */
3350
3351 static void
3352 gtk_text_view_add (GtkContainer *container,
3353                    GtkWidget    *child)
3354 {
3355   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
3356   g_return_if_fail (GTK_IS_WIDGET (child));
3357
3358   /* This is pretty random. */
3359   gtk_text_view_add_child_in_window (GTK_TEXT_VIEW (container),
3360                                      child,
3361                                      GTK_TEXT_WINDOW_WIDGET,
3362                                      0, 0);
3363 }
3364
3365 static void
3366 gtk_text_view_remove (GtkContainer *container,
3367                       GtkWidget    *child)
3368 {
3369   GSList *iter;
3370   GtkTextView *text_view;
3371   GtkTextViewChild *vc;
3372
3373   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
3374   g_return_if_fail (GTK_IS_WIDGET (child));
3375   g_return_if_fail (child->parent == (GtkWidget*) container);
3376
3377   text_view = GTK_TEXT_VIEW (container);
3378
3379   vc = NULL;
3380   iter = text_view->children;
3381
3382   while (iter != NULL)
3383     {
3384       vc = iter->data;
3385
3386       if (vc->widget == child)
3387         break;
3388
3389       iter = g_slist_next (iter);
3390     }
3391
3392   g_assert (iter != NULL); /* be sure we had the child in the list */
3393
3394   text_view->children = g_slist_remove (text_view->children, vc);
3395
3396   gtk_widget_unparent (vc->widget);
3397
3398   text_view_child_free (vc);
3399 }
3400
3401 static void
3402 gtk_text_view_forall (GtkContainer *container,
3403                       gboolean      include_internals,
3404                       GtkCallback   callback,
3405                       gpointer      callback_data)
3406 {
3407   GSList *iter;
3408   GtkTextView *text_view;
3409
3410   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
3411   g_return_if_fail (callback != NULL);
3412
3413   text_view = GTK_TEXT_VIEW (container);
3414
3415   iter = text_view->children;
3416
3417   while (iter != NULL)
3418     {
3419       GtkTextViewChild *vc = iter->data;
3420
3421       (* callback) (vc->widget, callback_data);
3422
3423       iter = g_slist_next (iter);
3424     }
3425 }
3426
3427 /* Note that CURSOR_ON_TIME is effectively added to PREBLINK_TIME
3428  * because blinking starts with the cursor turned on.
3429  */
3430 #define PREBLINK_TIME 300
3431 #define CURSOR_ON_TIME 800
3432 #define CURSOR_OFF_TIME 400
3433
3434 /*
3435  * preblink!
3436  */
3437
3438 static gint
3439 preblink_cb (gpointer data)
3440 {
3441   GtkTextView *text_view = GTK_TEXT_VIEW (data);
3442
3443   text_view->preblink_timeout = 0;
3444   gtk_text_view_start_cursor_blink (text_view, FALSE);
3445
3446   /* Remove ourselves */
3447   return FALSE;
3448 }
3449
3450 /*
3451  * Blink!
3452  */
3453
3454 static gint
3455 blink_cb (gpointer data)
3456 {
3457   GtkTextView *text_view = GTK_TEXT_VIEW (data);
3458   gboolean visible;
3459
3460   g_assert (text_view->layout);
3461   g_assert (GTK_WIDGET_HAS_FOCUS (text_view));
3462   g_assert (text_view->cursor_visible);
3463
3464   visible = gtk_text_layout_get_cursor_visible (text_view->layout);
3465
3466   if (visible)
3467     text_view->blink_timeout = gtk_timeout_add (CURSOR_OFF_TIME,
3468                                                 blink_cb,
3469                                                 text_view);
3470   else
3471     text_view->blink_timeout = gtk_timeout_add (CURSOR_ON_TIME,
3472                                                 blink_cb,
3473                                                 text_view);
3474
3475   gtk_text_layout_set_cursor_visible (text_view->layout,
3476                                       !visible);
3477
3478   /* Remove ourselves */
3479   return FALSE;
3480 }
3481
3482 static void
3483 gtk_text_view_start_cursor_blink(GtkTextView *text_view,
3484                                  gboolean     with_delay)
3485 {
3486 #ifdef DEBUG_VALIDATION_AND_SCROLLING
3487   return;
3488 #endif
3489
3490   if (text_view->layout == NULL)
3491     return;
3492
3493   if (!text_view->cursor_visible)
3494     return;
3495
3496   if (!GTK_WIDGET_HAS_FOCUS (text_view))
3497     return;
3498
3499   if (text_view->preblink_timeout != 0)
3500     {
3501       gtk_timeout_remove (text_view->preblink_timeout);
3502       text_view->preblink_timeout = 0;
3503     }
3504
3505   if (with_delay)
3506     {
3507       if (text_view->blink_timeout != 0)
3508         {
3509           gtk_timeout_remove (text_view->blink_timeout);
3510           text_view->blink_timeout = 0;
3511         }
3512
3513       gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3514
3515       text_view->preblink_timeout = gtk_timeout_add (PREBLINK_TIME,
3516                                                      preblink_cb,
3517                                                      text_view);
3518     }
3519   else
3520     {
3521       if (text_view->blink_timeout == 0)
3522         {
3523           gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
3524
3525           text_view->blink_timeout = gtk_timeout_add (CURSOR_ON_TIME,
3526                                                       blink_cb,
3527                                                       text_view);
3528         }
3529     }
3530 }
3531
3532 static void
3533 gtk_text_view_stop_cursor_blink (GtkTextView *text_view)
3534 {
3535   if (text_view->preblink_timeout)
3536     {
3537       gtk_timeout_remove (text_view->preblink_timeout);
3538       text_view->preblink_timeout = 0;
3539     }
3540
3541   if (text_view->blink_timeout)
3542     {
3543       gtk_timeout_remove (text_view->blink_timeout);
3544       text_view->blink_timeout = 0;
3545     }
3546 }
3547
3548 /*
3549  * Key binding handlers
3550  */
3551
3552 static void
3553 gtk_text_view_move_iter_by_lines (GtkTextView *text_view,
3554                                   GtkTextIter *newplace,
3555                                   gint         count)
3556 {
3557   while (count < 0)
3558     {
3559       gtk_text_layout_move_iter_to_previous_line (text_view->layout, newplace);
3560       count++;
3561     }
3562
3563   while (count > 0)
3564     {
3565       gtk_text_layout_move_iter_to_next_line (text_view->layout, newplace);
3566       count--;
3567     }
3568 }
3569
3570 static void
3571 gtk_text_view_move_cursor (GtkTextView     *text_view,
3572                            GtkMovementStep  step,
3573                            gint             count,
3574                            gboolean         extend_selection)
3575 {
3576   GtkTextIter insert;
3577   GtkTextIter newplace;
3578
3579   gint cursor_x_pos = 0;
3580
3581   gtk_text_view_reset_im_context (text_view);
3582
3583   if (step == GTK_MOVEMENT_PAGES)
3584     {
3585       gtk_text_view_scroll_pages (text_view, count);
3586       gtk_text_view_start_cursor_blink (text_view, TRUE);
3587       return;
3588     }
3589
3590   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
3591                                     gtk_text_buffer_get_mark (get_buffer (text_view),
3592                                                               "insert"));
3593   newplace = insert;
3594
3595   if (step == GTK_MOVEMENT_DISPLAY_LINES)
3596     gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, NULL);
3597
3598   switch (step)
3599     {
3600     case GTK_MOVEMENT_LOGICAL_POSITIONS:
3601       gtk_text_iter_forward_cursor_positions (&newplace, count);
3602       break;
3603
3604     case GTK_MOVEMENT_VISUAL_POSITIONS:
3605       gtk_text_layout_move_iter_visually (text_view->layout,
3606                                           &newplace, count);
3607       break;
3608
3609     case GTK_MOVEMENT_WORDS:
3610       if (count < 0)
3611         gtk_text_iter_backward_word_starts (&newplace, -count);
3612       else if (count > 0)
3613         gtk_text_iter_forward_word_ends (&newplace, count);
3614       break;
3615
3616     case GTK_MOVEMENT_DISPLAY_LINES:
3617       gtk_text_view_move_iter_by_lines (text_view, &newplace, count);
3618       gtk_text_layout_move_iter_to_x (text_view->layout, &newplace, cursor_x_pos);
3619       break;
3620
3621     case GTK_MOVEMENT_DISPLAY_LINE_ENDS:
3622       if (count > 1)
3623         gtk_text_view_move_iter_by_lines (text_view, &newplace, --count);
3624       else if (count < -1)
3625         gtk_text_view_move_iter_by_lines (text_view, &newplace, ++count);
3626
3627       if (count != 0)
3628         gtk_text_layout_move_iter_to_line_end (text_view->layout, &newplace, count);
3629       break;
3630
3631     case GTK_MOVEMENT_PARAGRAPHS:
3632       /* This should almost certainly instead be doing the parallel thing to WORD */
3633       /*       gtk_text_iter_down_lines (&newplace, count); */
3634       /* FIXME */
3635       break;
3636
3637     case GTK_MOVEMENT_PARAGRAPH_ENDS:
3638       if (count > 0)
3639         gtk_text_iter_forward_to_line_end (&newplace);
3640       else if (count < 0)
3641         gtk_text_iter_set_line_offset (&newplace, 0);
3642       break;
3643
3644     case GTK_MOVEMENT_BUFFER_ENDS:
3645       if (count > 0)
3646         gtk_text_buffer_get_end_iter (get_buffer (text_view), &newplace);
3647       else if (count < 0)
3648         gtk_text_buffer_get_iter_at_offset (get_buffer (text_view), &newplace, 0);
3649       break;
3650
3651     default:
3652       break;
3653     }
3654
3655   if (!gtk_text_iter_equal (&insert, &newplace))
3656     {
3657       if (extend_selection)
3658         gtk_text_buffer_move_mark (get_buffer (text_view),
3659                                    gtk_text_buffer_get_mark (get_buffer (text_view),
3660                                                              "insert"),
3661                                    &newplace);
3662       else
3663         gtk_text_buffer_place_cursor (get_buffer (text_view), &newplace);
3664
3665       gtk_text_view_scroll_mark_onscreen (text_view,
3666                                           gtk_text_buffer_get_mark (get_buffer (text_view),
3667                                                                     "insert"));
3668
3669       if (step == GTK_MOVEMENT_DISPLAY_LINES)
3670         {
3671           gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, -1);
3672         }
3673     }
3674
3675   gtk_text_view_start_cursor_blink (text_view, TRUE);
3676 }
3677
3678 static void
3679 gtk_text_view_set_anchor (GtkTextView *text_view)
3680 {
3681   GtkTextIter insert;
3682
3683   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
3684                                     gtk_text_buffer_get_mark (get_buffer (text_view),
3685                                                               "insert"));
3686
3687   gtk_text_buffer_create_mark (get_buffer (text_view), "anchor", &insert, TRUE);
3688 }
3689
3690 static void
3691 gtk_text_view_scroll_pages (GtkTextView *text_view,
3692                             gint         count)
3693 {
3694   gdouble newval;
3695   GtkAdjustment *adj;
3696   gint cursor_x_pos, cursor_y_pos;
3697   GtkTextIter new_insert;
3698   GtkTextIter anchor;
3699   gint y0, y1;
3700
3701   g_return_if_fail (text_view->vadjustment != NULL);
3702
3703   adj = text_view->vadjustment;
3704
3705   /* Validate the region that will be brought into view by the cursor motion
3706    */
3707   if (count < 0)
3708     {
3709       gtk_text_view_get_first_para_iter (text_view, &anchor);
3710       y0 = adj->page_size;
3711       y1 = adj->page_size + count * adj->page_increment;
3712     }
3713   else
3714     {
3715       gtk_text_view_get_first_para_iter (text_view, &anchor);
3716       y0 = count * adj->page_increment + adj->page_size;
3717       y1 = 0;
3718     }
3719
3720   gtk_text_layout_validate_yrange (text_view->layout, &anchor, y0, y1);
3721
3722   gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, &cursor_y_pos);
3723
3724   newval = adj->value;
3725
3726   newval += count * adj->page_increment;
3727
3728   cursor_y_pos += newval - adj->value;
3729   set_adjustment_clamped (adj, newval);
3730
3731   gtk_text_layout_get_iter_at_pixel (text_view->layout, &new_insert, cursor_x_pos, cursor_y_pos);
3732   clamp_iter_onscreen (text_view, &new_insert);
3733   gtk_text_buffer_place_cursor (get_buffer (text_view), &new_insert);
3734
3735   gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, cursor_y_pos);
3736
3737   /* Adjust to have the cursor _entirely_ onscreen, move_mark_onscreen
3738    * only guarantees 1 pixel onscreen.
3739    */
3740   gtk_text_view_scroll_mark_onscreen (text_view,
3741                                       gtk_text_buffer_get_mark (get_buffer (text_view),
3742                                                                 "insert"));
3743 }
3744
3745 static gboolean
3746 whitespace (gunichar ch, gpointer user_data)
3747 {
3748   return (ch == ' ' || ch == '\t');
3749 }
3750
3751 static gboolean
3752 not_whitespace (gunichar ch, gpointer user_data)
3753 {
3754   return !whitespace (ch, user_data);
3755 }
3756
3757 static gboolean
3758 find_whitepace_region (const GtkTextIter *center,
3759                        GtkTextIter *start, GtkTextIter *end)
3760 {
3761   *start = *center;
3762   *end = *center;
3763
3764   if (gtk_text_iter_backward_find_char (start, not_whitespace, NULL, NULL))
3765     gtk_text_iter_forward_char (start); /* we want the first whitespace... */
3766   if (whitespace (gtk_text_iter_get_char (end), NULL))
3767     gtk_text_iter_forward_find_char (end, not_whitespace, NULL, NULL);
3768
3769   return !gtk_text_iter_equal (start, end);
3770 }
3771
3772 static void
3773 gtk_text_view_insert_at_cursor (GtkTextView *text_view,
3774                                 const gchar *str)
3775 {
3776   gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
3777                                                 text_view->editable);
3778 }
3779
3780 static void
3781 gtk_text_view_delete_from_cursor (GtkTextView   *text_view,
3782                                   GtkDeleteType  type,
3783                                   gint           count)
3784 {
3785   GtkTextIter insert;
3786   GtkTextIter start;
3787   GtkTextIter end;
3788   gboolean leave_one = FALSE;
3789
3790   gtk_text_view_reset_im_context (text_view);
3791
3792   if (type == GTK_DELETE_CHARS)
3793     {
3794       /* Char delete deletes the selection, if one exists */
3795       if (gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
3796                                             text_view->editable))
3797         return;
3798     }
3799
3800   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
3801                                     &insert,
3802                                     gtk_text_buffer_get_mark (get_buffer (text_view),
3803                                                               "insert"));
3804
3805   start = insert;
3806   end = insert;
3807
3808   switch (type)
3809     {
3810     case GTK_DELETE_CHARS:
3811       gtk_text_iter_forward_cursor_positions (&end, count);
3812       break;
3813
3814     case GTK_DELETE_WORD_ENDS:
3815       if (count > 0)
3816         gtk_text_iter_forward_word_ends (&end, count);
3817       else if (count < 0)
3818         gtk_text_iter_backward_word_starts (&start, 0 - count);
3819       break;
3820
3821     case GTK_DELETE_WORDS:
3822       break;
3823
3824     case GTK_DELETE_DISPLAY_LINE_ENDS:
3825       break;
3826
3827     case GTK_DELETE_DISPLAY_LINES:
3828       break;
3829
3830     case GTK_DELETE_PARAGRAPH_ENDS:
3831       /* If we're already at a newline, we need to
3832        * simply delete that newline, instead of
3833        * moving to the next one.
3834        */
3835       if (gtk_text_iter_ends_line (&end))
3836         {
3837           gtk_text_iter_forward_line (&end);
3838           --count;
3839         }
3840
3841       while (count > 0)
3842         {
3843           if (!gtk_text_iter_forward_to_line_end (&end))
3844             break;
3845
3846           --count;
3847         }
3848
3849       /* FIXME figure out what a negative count means
3850          and support that */
3851       break;
3852
3853     case GTK_DELETE_PARAGRAPHS:
3854       if (count > 0)
3855         {
3856           gtk_text_iter_set_line_offset (&start, 0);
3857           gtk_text_iter_forward_to_line_end (&end);
3858
3859           /* Do the lines beyond the first. */
3860           while (count > 1)
3861             {
3862               gtk_text_iter_forward_to_line_end (&end);
3863
3864               --count;
3865             }
3866         }
3867
3868       /* FIXME negative count? */
3869
3870       break;
3871
3872     case GTK_DELETE_WHITESPACE:
3873       {
3874         find_whitepace_region (&insert, &start, &end);
3875       }
3876       break;
3877
3878     default:
3879       break;
3880     }
3881
3882   if (!gtk_text_iter_equal (&start, &end))
3883     {
3884       gtk_text_buffer_begin_user_action (get_buffer (text_view));
3885
3886       if (gtk_text_buffer_delete_interactive (get_buffer (text_view), &start, &end,
3887                                               text_view->editable))
3888         {
3889           if (leave_one)
3890             gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view),
3891                                                           " ", 1,
3892                                                           text_view->editable);
3893         }
3894
3895       gtk_text_buffer_end_user_action (get_buffer (text_view));
3896
3897       gtk_text_view_scroll_mark_onscreen (text_view,
3898                                           gtk_text_buffer_get_mark (get_buffer (text_view), "insert"));
3899     }
3900 }
3901
3902 static void
3903 gtk_text_view_cut_clipboard (GtkTextView *text_view)
3904 {
3905   gtk_text_buffer_cut_clipboard (get_buffer (text_view), text_view->editable);
3906   gtk_text_view_scroll_mark_onscreen (text_view,
3907                                       gtk_text_buffer_get_mark (get_buffer (text_view),
3908                                                                 "insert"));
3909 }
3910
3911 static void
3912 gtk_text_view_copy_clipboard (GtkTextView *text_view)
3913 {
3914   gtk_text_buffer_copy_clipboard (get_buffer (text_view));
3915   gtk_text_view_scroll_mark_onscreen (text_view,
3916                                       gtk_text_buffer_get_mark (get_buffer (text_view),
3917                                                                 "insert"));
3918 }
3919
3920 static void
3921 gtk_text_view_paste_clipboard (GtkTextView *text_view)
3922 {
3923   gtk_text_buffer_paste_clipboard (get_buffer (text_view), text_view->editable);
3924   gtk_text_view_scroll_mark_onscreen (text_view,
3925                                       gtk_text_buffer_get_mark (get_buffer (text_view),
3926                                                                 "insert"));
3927 }
3928
3929 static void
3930 gtk_text_view_toggle_overwrite (GtkTextView *text_view)
3931 {
3932   text_view->overwrite_mode = !text_view->overwrite_mode;
3933 }
3934
3935 /*
3936  * Selections
3937  */
3938
3939 static void
3940 gtk_text_view_unselect (GtkTextView *text_view)
3941 {
3942   GtkTextIter insert;
3943
3944   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
3945                                     &insert,
3946                                     gtk_text_buffer_get_mark (get_buffer (text_view),
3947                                                               "insert"));
3948
3949   gtk_text_buffer_move_mark (get_buffer (text_view),
3950                              gtk_text_buffer_get_mark (get_buffer (text_view),
3951                                                        "selection_bound"),
3952                              &insert);
3953 }
3954
3955 static void
3956 move_mark_to_pointer_and_scroll (GtkTextView *text_view,
3957                                  const gchar *mark_name)
3958 {
3959   gint x, y;
3960   GdkModifierType state;
3961   GtkTextIter newplace;
3962
3963   gdk_window_get_pointer (text_view->text_window->bin_window,
3964                           &x, &y, &state);
3965
3966   gtk_text_layout_get_iter_at_pixel (text_view->layout,
3967                                      &newplace,
3968                                      x + text_view->xoffset,
3969                                      y + text_view->yoffset);
3970
3971   {
3972     GtkTextMark *mark =
3973       gtk_text_buffer_get_mark (get_buffer (text_view), mark_name);
3974
3975     gtk_text_buffer_move_mark (get_buffer (text_view),
3976                                mark,
3977                                &newplace);
3978
3979     gtk_text_view_scroll_mark_onscreen (text_view, mark);
3980   }
3981 }
3982
3983 static gint
3984 selection_scan_timeout (gpointer data)
3985 {
3986   GtkTextView *text_view;
3987
3988   text_view = GTK_TEXT_VIEW (data);
3989
3990   move_mark_to_pointer_and_scroll (text_view, "insert");
3991
3992   return TRUE; /* remain installed. */
3993 }
3994
3995 #define DND_SCROLL_MARGIN 0.20
3996
3997 static gint
3998 drag_scan_timeout (gpointer data)
3999 {
4000   GtkTextView *text_view;
4001   gint x, y;
4002   GdkModifierType state;
4003   GtkTextIter newplace;
4004
4005   text_view = GTK_TEXT_VIEW (data);
4006
4007   gdk_window_get_pointer (text_view->text_window->bin_window,
4008                           &x, &y, &state);
4009
4010   gtk_text_layout_get_iter_at_pixel (text_view->layout,
4011                                      &newplace,
4012                                      x + text_view->xoffset,
4013                                      y + text_view->yoffset);
4014
4015   gtk_text_buffer_move_mark (get_buffer (text_view),
4016                              text_view->dnd_mark,
4017                              &newplace);
4018
4019   gtk_text_view_scroll_to_mark (text_view,
4020                                 text_view->dnd_mark,
4021                                 DND_SCROLL_MARGIN, FALSE, 0.0, 0.0);
4022
4023   return TRUE;
4024 }
4025
4026 static gint
4027 selection_motion_event_handler (GtkTextView *text_view, GdkEventMotion *event, gpointer data)
4028 {
4029   move_mark_to_pointer_and_scroll (text_view, "insert");
4030
4031   /* If we had to scroll offscreen, insert a timeout to do so
4032    * again. Note that in the timeout, even if the mouse doesn't
4033    * move, due to this scroll xoffset/yoffset will have changed
4034    * and we'll need to scroll again.
4035    */
4036   if (text_view->scroll_timeout != 0) /* reset on every motion event */
4037     gtk_timeout_remove (text_view->scroll_timeout);
4038
4039   text_view->scroll_timeout =
4040     gtk_timeout_add (50, selection_scan_timeout, text_view);
4041
4042   return TRUE;
4043 }
4044
4045 static void
4046 gtk_text_view_start_selection_drag (GtkTextView       *text_view,
4047                                     const GtkTextIter *iter,
4048                                     GdkEventButton    *button)
4049 {
4050   GtkTextIter newplace;
4051
4052   g_return_if_fail (text_view->selection_drag_handler == 0);
4053
4054   gtk_grab_add (GTK_WIDGET (text_view));
4055
4056   newplace = *iter;
4057
4058   gtk_text_buffer_place_cursor (get_buffer (text_view), &newplace);
4059
4060   text_view->selection_drag_handler = gtk_signal_connect (GTK_OBJECT (text_view),
4061                                                           "motion_notify_event",
4062                                                           GTK_SIGNAL_FUNC (selection_motion_event_handler),
4063                                                           NULL);
4064 }
4065
4066 /* returns whether we were really dragging */
4067 static gboolean
4068 gtk_text_view_end_selection_drag (GtkTextView *text_view, GdkEventButton *event)
4069 {
4070   if (text_view->selection_drag_handler == 0)
4071     return FALSE;
4072
4073   gtk_signal_disconnect (GTK_OBJECT (text_view), text_view->selection_drag_handler);
4074   text_view->selection_drag_handler = 0;
4075
4076   if (text_view->scroll_timeout != 0)
4077     {
4078       gtk_timeout_remove (text_view->scroll_timeout);
4079       text_view->scroll_timeout = 0;
4080     }
4081
4082   /* one last update to current position */
4083   move_mark_to_pointer_and_scroll (text_view, "insert");
4084
4085   gtk_grab_remove (GTK_WIDGET (text_view));
4086
4087   return TRUE;
4088 }
4089
4090 /*
4091  * Layout utils
4092  */
4093
4094 static void
4095 gtk_text_view_set_attributes_from_style (GtkTextView        *text_view,
4096                                          GtkTextAttributes *values,
4097                                          GtkStyle           *style)
4098 {
4099   values->appearance.bg_color = style->base[GTK_STATE_NORMAL];
4100   values->appearance.fg_color = style->fg[GTK_STATE_NORMAL];
4101
4102   if (values->font.family_name)
4103     g_free (values->font.family_name);
4104
4105   values->font = *style->font_desc;
4106   values->font.family_name = g_strdup (style->font_desc->family_name);
4107 }
4108
4109 static void
4110 gtk_text_view_ensure_layout (GtkTextView *text_view)
4111 {
4112   GtkWidget *widget;
4113
4114   widget = GTK_WIDGET (text_view);
4115
4116   if (text_view->layout == NULL)
4117     {
4118       GtkTextAttributes *style;
4119       PangoContext *ltr_context, *rtl_context;
4120       GSList *tmp_list;
4121
4122       DV(g_print(G_STRLOC"\n"));
4123
4124       text_view->layout = gtk_text_layout_new ();
4125
4126       g_signal_connect_data (G_OBJECT (text_view->layout),
4127                              "invalidated",
4128                              invalidated_handler,
4129                              text_view,
4130                              NULL, FALSE, FALSE);
4131
4132       g_signal_connect_data (G_OBJECT (text_view->layout),
4133                              "changed",
4134                              changed_handler,
4135                              text_view,
4136                              NULL, FALSE, FALSE);
4137
4138       g_signal_connect_data (G_OBJECT (text_view->layout),
4139                              "allocate_child",
4140                              gtk_text_view_child_allocated,
4141                              text_view,
4142                              NULL, FALSE, FALSE);
4143
4144       if (get_buffer (text_view))
4145         gtk_text_layout_set_buffer (text_view->layout, get_buffer (text_view));
4146
4147       if ((GTK_WIDGET_HAS_FOCUS (text_view) && text_view->cursor_visible))
4148         gtk_text_view_start_cursor_blink (text_view, FALSE);
4149       else
4150         gtk_text_layout_set_cursor_visible (text_view->layout, FALSE);
4151
4152       ltr_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
4153       pango_context_set_base_dir (ltr_context, PANGO_DIRECTION_LTR);
4154       rtl_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
4155       pango_context_set_base_dir (rtl_context, PANGO_DIRECTION_RTL);
4156
4157       gtk_text_layout_set_contexts (text_view->layout, ltr_context, rtl_context);
4158
4159       g_object_unref (G_OBJECT (ltr_context));
4160       g_object_unref (G_OBJECT (rtl_context));
4161
4162       style = gtk_text_attributes_new ();
4163
4164       gtk_widget_ensure_style (widget);
4165       gtk_text_view_set_attributes_from_style (text_view,
4166                                                style, widget->style);
4167
4168       style->pixels_above_lines = text_view->pixels_above_lines;
4169       style->pixels_below_lines = text_view->pixels_below_lines;
4170       style->pixels_inside_wrap = text_view->pixels_inside_wrap;
4171       style->left_margin = text_view->left_margin;
4172       style->right_margin = text_view->right_margin;
4173       style->indent = text_view->indent;
4174       style->tabs = text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
4175
4176       style->wrap_mode = text_view->wrap_mode;
4177       style->justification = text_view->justify;
4178       style->direction = gtk_widget_get_direction (GTK_WIDGET (text_view));
4179
4180       gtk_text_layout_set_default_style (text_view->layout, style);
4181
4182       gtk_text_attributes_unref (style);
4183
4184       /* Set layout for all anchored children */
4185
4186       tmp_list = text_view->children;
4187       while (tmp_list != NULL)
4188         {
4189           GtkTextViewChild *vc = tmp_list->data;
4190
4191           if (vc->anchor)
4192             {
4193               gtk_text_anchored_child_set_layout (vc->widget,
4194                                                   text_view->layout);
4195               /* vc may now be invalid! */
4196             }
4197
4198           tmp_list = g_slist_next (tmp_list);
4199         }
4200     }
4201 }
4202
4203 static void
4204 gtk_text_view_destroy_layout (GtkTextView *text_view)
4205 {
4206   if (text_view->layout)
4207     {
4208       GSList *tmp_list;
4209
4210       if (text_view->incremental_validate_idle)
4211         {
4212           g_source_remove (text_view->incremental_validate_idle);
4213           text_view->incremental_validate_idle = 0;
4214         }
4215
4216       /* Remove layout from all anchored children */
4217
4218       tmp_list = text_view->children;
4219       while (tmp_list != NULL)
4220         {
4221           GtkTextViewChild *vc = tmp_list->data;
4222
4223           if (vc->anchor)
4224             {
4225               gtk_text_anchored_child_set_layout (vc->widget, NULL);
4226               /* vc may now be invalid! */
4227             }
4228
4229           tmp_list = g_slist_next (tmp_list);
4230         }
4231
4232       gtk_text_view_stop_cursor_blink (text_view);
4233       gtk_text_view_end_selection_drag (text_view, NULL);
4234
4235       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->layout),
4236                                             invalidated_handler, text_view);
4237       g_signal_handlers_disconnect_by_func (G_OBJECT (text_view->layout),
4238                                             changed_handler, text_view);
4239       g_object_unref (G_OBJECT (text_view->layout));
4240       text_view->layout = NULL;
4241     }
4242 }
4243
4244 static void
4245 gtk_text_view_reset_im_context (GtkTextView *text_view)
4246 {
4247   if (text_view->need_im_reset)
4248     {
4249       text_view->need_im_reset = FALSE;
4250       gtk_im_context_reset (text_view->im_context);
4251     }
4252 }
4253
4254 /*
4255  * DND feature
4256  */
4257
4258 static void
4259 gtk_text_view_start_selection_dnd (GtkTextView       *text_view,
4260                                    const GtkTextIter *iter,
4261                                    GdkEventMotion    *event)
4262 {
4263   GdkDragContext *context;
4264   GtkTargetList *target_list;
4265
4266   text_view->drag_start_x = -1;
4267   text_view->drag_start_y = -1;
4268
4269   target_list = gtk_target_list_new (target_table,
4270                                      G_N_ELEMENTS (target_table));
4271
4272   context = gtk_drag_begin (GTK_WIDGET (text_view), target_list,
4273                             GDK_ACTION_COPY | GDK_ACTION_MOVE,
4274                             1, (GdkEvent*)event);
4275
4276   gtk_target_list_unref (target_list);
4277
4278   gtk_drag_set_icon_default (context);
4279 }
4280
4281 static void
4282 gtk_text_view_drag_begin (GtkWidget        *widget,
4283                           GdkDragContext   *context)
4284 {
4285   /* do nothing */
4286 }
4287
4288 static void
4289 gtk_text_view_drag_end (GtkWidget        *widget,
4290                         GdkDragContext   *context)
4291 {
4292   GtkTextView *text_view;
4293
4294   text_view = GTK_TEXT_VIEW (widget);
4295 }
4296
4297 static void
4298 gtk_text_view_drag_data_get (GtkWidget        *widget,
4299                              GdkDragContext   *context,
4300                              GtkSelectionData *selection_data,
4301                              guint             info,
4302                              guint             time)
4303 {
4304   GtkTextView *text_view;
4305
4306   text_view = GTK_TEXT_VIEW (widget);
4307
4308   if (selection_data->target == gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE))
4309     {
4310       GtkTextBuffer *buffer = gtk_text_view_get_buffer (text_view);
4311
4312       gtk_selection_data_set (selection_data,
4313                               gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE),
4314                               8, /* bytes */
4315                               (void*)&buffer,
4316                               sizeof (buffer));
4317     }
4318   else
4319     {
4320       gchar *str;
4321       GtkTextIter start;
4322       GtkTextIter end;
4323
4324       str = NULL;
4325
4326       if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
4327                                                 &start, &end))
4328         {
4329           /* Extract the selected text */
4330           str = gtk_text_iter_get_visible_text (&start, &end);
4331         }
4332
4333       if (str)
4334         {
4335           gtk_selection_data_set_text (selection_data, str);
4336           g_free (str);
4337         }
4338     }
4339 }
4340
4341 static void
4342 gtk_text_view_drag_data_delete (GtkWidget        *widget,
4343                                 GdkDragContext   *context)
4344 {
4345   GtkTextView *text_view;
4346
4347   text_view = GTK_TEXT_VIEW (widget);
4348
4349   gtk_text_buffer_delete_selection (GTK_TEXT_VIEW (widget)->buffer,
4350                                     TRUE, GTK_TEXT_VIEW (widget)->editable);
4351 }
4352
4353 static void
4354 gtk_text_view_drag_leave (GtkWidget        *widget,
4355                           GdkDragContext   *context,
4356                           guint             time)
4357 {
4358   GtkTextView *text_view;
4359
4360   text_view = GTK_TEXT_VIEW (widget);
4361
4362   gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
4363
4364   if (text_view->scroll_timeout != 0)
4365     gtk_timeout_remove (text_view->scroll_timeout);
4366
4367   text_view->scroll_timeout = 0;
4368 }
4369
4370 static gboolean
4371 gtk_text_view_drag_motion (GtkWidget        *widget,
4372                            GdkDragContext   *context,
4373                            gint              x,
4374                            gint              y,
4375                            guint             time)
4376 {
4377   GtkTextIter newplace;
4378   GtkTextView *text_view;
4379   GtkTextIter start;
4380   GtkTextIter end;
4381   GdkRectangle target_rect;
4382   gint bx, by;
4383   GdkDragAction suggested_action = 0;
4384
4385   text_view = GTK_TEXT_VIEW (widget);
4386
4387   target_rect = text_view->text_window->allocation;
4388
4389   if (x < target_rect.x ||
4390       y < target_rect.y ||
4391       x > (target_rect.x + target_rect.width) ||
4392       y > (target_rect.y + target_rect.height))
4393     return FALSE; /* outside the text window, allow parent widgets to handle event */
4394
4395   gtk_text_view_window_to_buffer_coords (text_view,
4396                                          GTK_TEXT_WINDOW_WIDGET,
4397                                          x, y,
4398                                          &bx, &by);
4399
4400   gtk_text_layout_get_iter_at_pixel (text_view->layout,
4401                                      &newplace,
4402                                      bx, by);
4403
4404   if (gtk_drag_dest_find_target (widget, context,
4405                                  gtk_drag_dest_get_target_list (widget)) == GDK_NONE)
4406     {
4407       /* can't accept any of the offered targets */
4408     }
4409   else if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
4410                                             &start, &end) &&
4411            gtk_text_iter_in_range (&newplace, &start, &end))
4412     {
4413       /* We're inside the selection. */
4414     }
4415   else
4416     {
4417       if (gtk_text_iter_editable (&newplace, text_view->editable))
4418         {
4419           GtkWidget *source_widget;
4420
4421           suggested_action = context->suggested_action;
4422
4423           source_widget = gtk_drag_get_source_widget (context);
4424
4425           if (source_widget == widget)
4426             {
4427               /* Default to MOVE, unless the user has
4428                * pressed ctrl or alt to affect available actions
4429                */
4430               if ((context->actions & GDK_ACTION_MOVE) != 0)
4431                 suggested_action = GDK_ACTION_MOVE;
4432             }
4433         }
4434       else
4435         {
4436           /* Can't drop here. */
4437         }
4438     }
4439
4440   if (suggested_action != 0)
4441     {
4442       gtk_text_mark_set_visible (text_view->dnd_mark,
4443                                  text_view->cursor_visible);
4444
4445       gdk_drag_status (context, suggested_action, time);
4446     }
4447   else
4448     {
4449       gdk_drag_status (context, 0, time);
4450       gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
4451     }
4452
4453   gtk_text_buffer_move_mark (get_buffer (text_view),
4454                              text_view->dnd_mark,
4455                              &newplace);
4456
4457   gtk_text_view_scroll_to_mark (text_view,
4458                                 text_view->dnd_mark,
4459                                 DND_SCROLL_MARGIN, FALSE, 0.0, 0.0);
4460
4461   if (text_view->scroll_timeout != 0) /* reset on every motion event */
4462     gtk_timeout_remove (text_view->scroll_timeout);
4463
4464   text_view->scroll_timeout =
4465     gtk_timeout_add (50, drag_scan_timeout, text_view);
4466
4467   /* TRUE return means don't propagate the drag motion to parent
4468    * widgets that may also be drop sites.
4469    */
4470   return TRUE;
4471 }
4472
4473 static gboolean
4474 gtk_text_view_drag_drop (GtkWidget        *widget,
4475                          GdkDragContext   *context,
4476                          gint              x,
4477                          gint              y,
4478                          guint             time)
4479 {
4480   GtkTextView *text_view;
4481
4482   text_view = GTK_TEXT_VIEW (widget);
4483
4484   if (text_view->scroll_timeout != 0)
4485     gtk_timeout_remove (text_view->scroll_timeout);
4486
4487   text_view->scroll_timeout = 0;
4488
4489   gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
4490
4491   return TRUE;
4492 }
4493
4494 static void
4495 insert_text_data (GtkTextView      *text_view,
4496                   GtkTextIter      *drop_point,
4497                   GtkSelectionData *selection_data)
4498 {
4499   gchar *str;
4500
4501   str = gtk_selection_data_get_text (selection_data);
4502
4503   if (str)
4504     {
4505       gtk_text_buffer_insert_interactive (get_buffer (text_view),
4506                                           drop_point, str, -1,
4507                                           text_view->editable);
4508       g_free (str);
4509     }
4510 }
4511
4512 static void
4513 gtk_text_view_drag_data_received (GtkWidget        *widget,
4514                                   GdkDragContext   *context,
4515                                   gint              x,
4516                                   gint              y,
4517                                   GtkSelectionData *selection_data,
4518                                   guint             info,
4519                                   guint             time)
4520 {
4521   GtkTextIter drop_point;
4522   GtkTextView *text_view;
4523   GtkTextMark *drag_target_mark;
4524
4525   text_view = GTK_TEXT_VIEW (widget);
4526
4527   drag_target_mark = gtk_text_buffer_get_mark (get_buffer (text_view),
4528                                                "gtk_drag_target");
4529
4530   if (drag_target_mark == NULL)
4531     return;
4532
4533   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4534                                     &drop_point,
4535                                     drag_target_mark);
4536
4537   if (selection_data->target == gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE))
4538     {
4539       GtkTextBuffer *src_buffer = NULL;
4540       GtkTextIter start, end;
4541       gboolean copy_tags = TRUE;
4542
4543       if (selection_data->length != sizeof (src_buffer))
4544         return;
4545
4546       memcpy (&src_buffer, selection_data->data, sizeof (src_buffer));
4547
4548       if (src_buffer == NULL)
4549         return;
4550
4551       g_return_if_fail (GTK_IS_TEXT_BUFFER (src_buffer));
4552
4553       if (gtk_text_buffer_get_tag_table (src_buffer) !=
4554           gtk_text_buffer_get_tag_table (get_buffer (text_view)))
4555         copy_tags = FALSE;
4556
4557       if (gtk_text_buffer_get_selection_bounds (src_buffer,
4558                                                 &start,
4559                                                 &end))
4560         {
4561           if (copy_tags)
4562             gtk_text_buffer_insert_range_interactive (get_buffer (text_view),
4563                                                       &drop_point,
4564                                                       &start,
4565                                                       &end,
4566                                                       text_view->editable);
4567           else
4568             {
4569               gchar *str;
4570
4571               str = gtk_text_iter_get_visible_text (&start, &end);
4572               gtk_text_buffer_insert_interactive (get_buffer (text_view),
4573                                                   &drop_point, str, -1,
4574                                                   text_view->editable);
4575               g_free (str);
4576             }
4577         }
4578     }
4579   else
4580     insert_text_data (text_view, &drop_point, selection_data);
4581 }
4582
4583 static GtkAdjustment*
4584 get_hadjustment (GtkTextView *text_view)
4585 {
4586   if (text_view->hadjustment == NULL)
4587     gtk_text_view_set_scroll_adjustments (text_view,
4588                                           NULL, /* forces creation */
4589                                           text_view->vadjustment);
4590
4591   return text_view->hadjustment;
4592 }
4593
4594 static GtkAdjustment*
4595 get_vadjustment (GtkTextView *text_view)
4596 {
4597   if (text_view->vadjustment == NULL)
4598     gtk_text_view_set_scroll_adjustments (text_view,
4599                                           text_view->hadjustment,
4600                                           NULL); /* forces creation */
4601   return text_view->vadjustment;
4602 }
4603
4604
4605 static void
4606 gtk_text_view_set_scroll_adjustments (GtkTextView   *text_view,
4607                                       GtkAdjustment *hadj,
4608                                       GtkAdjustment *vadj)
4609 {
4610   gboolean need_adjust = FALSE;
4611
4612   g_return_if_fail (text_view != NULL);
4613   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
4614
4615   if (hadj)
4616     g_return_if_fail (GTK_IS_ADJUSTMENT (hadj));
4617   else
4618     hadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
4619   if (vadj)
4620     g_return_if_fail (GTK_IS_ADJUSTMENT (vadj));
4621   else
4622     vadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
4623
4624   if (text_view->hadjustment && (text_view->hadjustment != hadj))
4625     {
4626       gtk_signal_disconnect_by_data (GTK_OBJECT (text_view->hadjustment), text_view);
4627       g_object_unref (G_OBJECT (text_view->hadjustment));
4628     }
4629
4630   if (text_view->vadjustment && (text_view->vadjustment != vadj))
4631     {
4632       gtk_signal_disconnect_by_data (GTK_OBJECT (text_view->vadjustment), text_view);
4633       g_object_unref (G_OBJECT (text_view->vadjustment));
4634     }
4635
4636   if (text_view->hadjustment != hadj)
4637     {
4638       text_view->hadjustment = hadj;
4639       g_object_ref (G_OBJECT (text_view->hadjustment));
4640       gtk_object_sink (GTK_OBJECT (text_view->hadjustment));
4641
4642       gtk_signal_connect (GTK_OBJECT (text_view->hadjustment), "value_changed",
4643                           (GtkSignalFunc) gtk_text_view_value_changed,
4644                           text_view);
4645       need_adjust = TRUE;
4646     }
4647
4648   if (text_view->vadjustment != vadj)
4649     {
4650       text_view->vadjustment = vadj;
4651       g_object_ref (G_OBJECT (text_view->vadjustment));
4652       gtk_object_sink (GTK_OBJECT (text_view->vadjustment));
4653
4654       gtk_signal_connect (GTK_OBJECT (text_view->vadjustment), "value_changed",
4655                           (GtkSignalFunc) gtk_text_view_value_changed,
4656                           text_view);
4657       need_adjust = TRUE;
4658     }
4659
4660   if (need_adjust)
4661     gtk_text_view_value_changed (NULL, text_view);
4662 }
4663
4664 static void
4665 gtk_text_view_value_changed (GtkAdjustment *adj,
4666                              GtkTextView   *text_view)
4667 {
4668   GtkTextIter iter;
4669   gint line_top;
4670   gint dx = 0;
4671   gint dy = 0;
4672
4673   text_view->onscreen_validated = FALSE;
4674
4675   DV(g_print(">Scroll offset changed, onscreen_validated = FALSE ("G_STRLOC")\n"));
4676
4677   if (adj == text_view->hadjustment)
4678     {
4679       dx = text_view->xoffset - (gint)adj->value;
4680       text_view->xoffset = adj->value;
4681     }
4682   else if (adj == text_view->vadjustment)
4683     {
4684       dy = text_view->yoffset - (gint)adj->value;
4685       text_view->yoffset = adj->value;
4686
4687       if (text_view->layout)
4688         {
4689           gtk_text_layout_get_line_at_y (text_view->layout, &iter, adj->value, &line_top);
4690
4691           gtk_text_buffer_move_mark (get_buffer (text_view), text_view->first_para_mark, &iter);
4692
4693           text_view->first_para_pixels = adj->value - line_top;
4694         }
4695     }
4696
4697   if (GTK_WIDGET_REALIZED (text_view) && (dx != 0 || dy != 0))
4698     {
4699       if (dy != 0)
4700         {
4701           if (text_view->left_window)
4702             text_window_scroll (text_view->left_window, 0, dy);
4703           if (text_view->right_window)
4704             text_window_scroll (text_view->right_window, 0, dy);
4705         }
4706
4707       if (dx != 0)
4708         {
4709           if (text_view->top_window)
4710             text_window_scroll (text_view->top_window, dx, 0);
4711           if (text_view->bottom_window)
4712             text_window_scroll (text_view->bottom_window, dx, 0);
4713         }
4714
4715       /* It looks nicer to scroll the main area last, because
4716        * it takes a while, and making the side areas update
4717        * afterward emphasizes the slowness of scrolling the
4718        * main area.
4719        */
4720       text_window_scroll (text_view->text_window, dx, dy);
4721     }
4722
4723   /* This could result in invalidation, which would install the
4724    * first_validate_idle, which would validate onscreen;
4725    * but we're going to go ahead and validate here, so
4726    * first_validate_idle shouldn't have anything to do.
4727    */
4728   gtk_text_view_update_layout_width (text_view);
4729
4730   /* note that validation of onscreen could invoke this function
4731    * recursively, by scrolling to maintain first_para, or in response
4732    * to updating the layout width, however there is no problem with
4733    * that, or shouldn't be.
4734    */
4735   gtk_text_view_validate_onscreen (text_view);
4736
4737   /* process exposes */
4738   if (GTK_WIDGET_REALIZED (text_view))
4739     {
4740       if (text_view->left_window)
4741         gdk_window_process_updates (text_view->left_window->bin_window, TRUE);
4742
4743       if (text_view->right_window)
4744         gdk_window_process_updates (text_view->right_window->bin_window, TRUE);
4745
4746       if (text_view->top_window)
4747         gdk_window_process_updates (text_view->top_window->bin_window, TRUE);
4748
4749       if (text_view->bottom_window)
4750         gdk_window_process_updates (text_view->bottom_window->bin_window, TRUE);
4751
4752       gdk_window_process_updates (text_view->text_window->bin_window, TRUE);
4753     }
4754
4755   /* If this got installed, get rid of it, it's just a waste of time. */
4756   if (text_view->first_validate_idle != 0)
4757     {
4758       g_source_remove (text_view->first_validate_idle);
4759       text_view->first_validate_idle = 0;
4760     }
4761
4762   DV(g_print(">End scroll offset changed handler ("G_STRLOC")\n"));
4763 }
4764
4765 static void
4766 gtk_text_view_commit_handler (GtkIMContext  *context,
4767                               const gchar   *str,
4768                               GtkTextView   *text_view)
4769 {
4770   gtk_text_buffer_begin_user_action (get_buffer (text_view));
4771
4772   gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
4773                                     text_view->editable);
4774
4775   if (!strcmp (str, "\n"))
4776     {
4777       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\n", 1,
4778                                                     text_view->editable);
4779     }
4780   else
4781     {
4782       if (text_view->overwrite_mode)
4783         gtk_text_view_delete_from_cursor (text_view, GTK_DELETE_CHARS, 1);
4784       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
4785                                                     text_view->editable);
4786     }
4787
4788   gtk_text_buffer_end_user_action (get_buffer (text_view));
4789
4790   gtk_text_view_scroll_mark_onscreen (text_view,
4791                                       gtk_text_buffer_get_mark (get_buffer (text_view),
4792                                                                 "insert"));
4793 }
4794
4795 static void
4796 gtk_text_view_preedit_changed_handler (GtkIMContext *context,
4797                                        GtkTextView  *text_view)
4798 {
4799   gchar *str;
4800   PangoAttrList *attrs;
4801   gint cursor_pos;
4802
4803   gtk_im_context_get_preedit_string (context, &str, &attrs, &cursor_pos);
4804   gtk_text_layout_set_preedit_string (text_view->layout, str, attrs, cursor_pos);
4805
4806   pango_attr_list_unref (attrs);
4807   g_free (str);
4808 }
4809
4810 static void
4811 gtk_text_view_mark_set_handler (GtkTextBuffer     *buffer,
4812                                 const GtkTextIter *location,
4813                                 GtkTextMark       *mark,
4814                                 gpointer           data)
4815 {
4816   GtkTextView *text_view = GTK_TEXT_VIEW (data);
4817   gboolean need_reset = FALSE;
4818
4819   if (mark == gtk_text_buffer_get_insert (buffer))
4820     {
4821       text_view->virtual_cursor_x = -1;
4822       text_view->virtual_cursor_y = -1;
4823       need_reset = TRUE;
4824     }
4825   else if (mark == gtk_text_buffer_get_selection_bound (buffer))
4826     {
4827       need_reset = TRUE;
4828     }
4829
4830   if (need_reset)
4831     gtk_text_view_reset_im_context (text_view);
4832 }
4833
4834 static void
4835 gtk_text_view_get_virtual_cursor_pos (GtkTextView *text_view,
4836                                       gint        *x,
4837                                       gint        *y)
4838 {
4839   GdkRectangle strong_pos;
4840   GtkTextIter insert;
4841
4842   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
4843                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4844                                                               "insert"));
4845
4846   if ((x && text_view->virtual_cursor_x == -1) ||
4847       (y && text_view->virtual_cursor_y == -1))
4848     gtk_text_layout_get_cursor_locations (text_view->layout, &insert, &strong_pos, NULL);
4849
4850   if (x)
4851     {
4852       if (text_view->virtual_cursor_x != -1)
4853         *x = text_view->virtual_cursor_x;
4854       else
4855         *x = strong_pos.x;
4856     }
4857
4858   if (y)
4859     {
4860       if (text_view->virtual_cursor_x != -1)
4861         *y = text_view->virtual_cursor_y;
4862       else
4863         *y = strong_pos.y + strong_pos.height / 2;
4864     }
4865 }
4866
4867 static void
4868 gtk_text_view_set_virtual_cursor_pos (GtkTextView *text_view,
4869                                       gint         x,
4870                                       gint         y)
4871 {
4872   GdkRectangle strong_pos;
4873   GtkTextIter insert;
4874
4875   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
4876                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4877                                                               "insert"));
4878
4879   if (x == -1 || y == -1)
4880     gtk_text_layout_get_cursor_locations (text_view->layout, &insert, &strong_pos, NULL);
4881
4882   text_view->virtual_cursor_x = (x == -1) ? strong_pos.x : x;
4883   text_view->virtual_cursor_y = (y == -1) ? strong_pos.y + strong_pos.height / 2 : y;
4884 }
4885
4886 /* Quick hack of a popup menu
4887  */
4888 static void
4889 activate_cb (GtkWidget   *menuitem,
4890              GtkTextView *text_view)
4891 {
4892   const gchar *signal = g_object_get_data (G_OBJECT (menuitem), "gtk-signal");
4893   gtk_signal_emit_by_name (GTK_OBJECT (text_view), signal);
4894 }
4895
4896 static void
4897 append_action_signal (GtkTextView  *text_view,
4898                       GtkWidget    *menu,
4899                       const gchar  *label,
4900                       const gchar  *signal,
4901                       gboolean      sensitive)
4902 {
4903   GtkWidget *menuitem = gtk_menu_item_new_with_label (label);
4904
4905   g_object_set_data (G_OBJECT (menuitem), "gtk-signal", (char *)signal);
4906   gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
4907                       GTK_SIGNAL_FUNC (activate_cb), text_view);
4908
4909   gtk_widget_set_sensitive (menuitem, sensitive);
4910
4911   gtk_widget_show (menuitem);
4912   gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
4913 }
4914
4915 static void
4916 popup_menu_detach (GtkWidget *attach_widget,
4917                    GtkMenu   *menu)
4918 {
4919   GTK_TEXT_VIEW (attach_widget)->popup_menu = NULL;
4920 }
4921
4922 static void
4923 popup_position_func (GtkMenu   *menu,
4924                      gint      *x,
4925                      gint      *y,
4926                      gboolean  *push_in,
4927                      gpointer   user_data)
4928 {
4929   GtkTextView *text_view;
4930   GtkWidget *widget;
4931   GdkRectangle cursor_rect;
4932   GdkRectangle onscreen_rect;
4933   gint root_x, root_y;
4934   GtkTextIter iter;
4935   GtkRequisition req;
4936
4937   text_view = GTK_TEXT_VIEW (user_data);
4938   widget = GTK_WIDGET (text_view);
4939
4940   g_return_if_fail (GTK_WIDGET_REALIZED (text_view));
4941
4942   gdk_window_get_origin (widget->window, &root_x, &root_y);
4943
4944   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
4945                                     &iter,
4946                                     gtk_text_buffer_get_insert (get_buffer (text_view)));
4947
4948   gtk_text_view_get_iter_location (text_view,
4949                                    &iter,
4950                                    &cursor_rect);
4951
4952   gtk_text_view_get_visible_rect (text_view, &onscreen_rect);
4953
4954   gtk_widget_size_request (text_view->popup_menu, &req);
4955
4956   /* can't use rectangle_intersect since cursor rect can have 0 width */
4957   if (cursor_rect.x >= onscreen_rect.x &&
4958       cursor_rect.x < onscreen_rect.x + onscreen_rect.width &&
4959       cursor_rect.y >= onscreen_rect.y &&
4960       cursor_rect.y < onscreen_rect.y + onscreen_rect.height)
4961     {
4962       gtk_text_view_buffer_to_window_coords (text_view,
4963                                              GTK_TEXT_WINDOW_WIDGET,
4964                                              cursor_rect.x, cursor_rect.y,
4965                                              &cursor_rect.x, &cursor_rect.y);
4966
4967       *x = root_x + cursor_rect.x + cursor_rect.width;
4968       *y = root_y + cursor_rect.y + cursor_rect.height;
4969     }
4970   else
4971     {
4972       /* Just center the menu, since cursor is offscreen. */
4973       *x = root_x + (widget->allocation.width / 2 - req.width / 2);
4974       *y = root_y + (widget->allocation.height / 2 - req.height / 2);
4975     }
4976
4977   /* Ensure sanity */
4978   *x = CLAMP (*x, root_x, (root_x + widget->allocation.width));
4979   *y = CLAMP (*y, root_y, (root_y + widget->allocation.height));
4980
4981   *x = CLAMP (*x, 0, MAX (0, gdk_screen_width () - req.width));
4982   *y = CLAMP (*y, 0, MAX (0, gdk_screen_height () - req.height));
4983 }
4984
4985 static void
4986 gtk_text_view_do_popup (GtkTextView    *text_view,
4987                         GdkEventButton *event)
4988 {
4989   GtkWidget *menuitem;
4990   GtkWidget *submenu;
4991   gboolean have_selection;
4992   gboolean can_insert;
4993   GtkTextIter iter;
4994
4995   if (text_view->popup_menu)
4996     gtk_widget_destroy (text_view->popup_menu);
4997
4998   text_view->popup_menu = gtk_menu_new ();
4999
5000   gtk_menu_attach_to_widget (GTK_MENU (text_view->popup_menu),
5001                              GTK_WIDGET (text_view),
5002                              popup_menu_detach);
5003
5004   have_selection = gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
5005                                                          NULL, NULL);
5006
5007   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
5008                                     &iter,
5009                                     gtk_text_buffer_get_insert (get_buffer (text_view)));
5010
5011   can_insert = gtk_text_iter_editable (&iter, text_view->editable);
5012
5013   append_action_signal (text_view, text_view->popup_menu, _("Cut"), "cut_clipboard",
5014                         have_selection);
5015   append_action_signal (text_view, text_view->popup_menu, _("Copy"), "copy_clipboard",
5016                         have_selection);
5017
5018   append_action_signal (text_view, text_view->popup_menu, _("Paste"), "paste_clipboard",
5019                         can_insert);
5020
5021   menuitem = gtk_separator_menu_item_new ();
5022   gtk_widget_show (menuitem);
5023   gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
5024
5025   menuitem = gtk_menu_item_new_with_label (_("Input Methods"));
5026   gtk_widget_show (menuitem);
5027   submenu = gtk_menu_new ();
5028   gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), submenu);
5029   gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
5030
5031   gtk_im_multicontext_append_menuitems (GTK_IM_MULTICONTEXT (text_view->im_context),
5032                                         GTK_MENU_SHELL (submenu));
5033
5034   gtk_signal_emit (GTK_OBJECT (text_view),
5035                    signals[POPULATE_POPUP],
5036                    text_view->popup_menu);
5037
5038   if (event)
5039     gtk_menu_popup (GTK_MENU (text_view->popup_menu), NULL, NULL,
5040                     NULL, NULL,
5041                     event->button, event->time);
5042   else
5043     gtk_menu_popup (GTK_MENU (text_view->popup_menu), NULL, NULL,
5044                     popup_position_func, text_view,
5045                     0, gtk_get_current_event_time ());
5046 }
5047
5048 static void
5049 gtk_text_view_popup_menu (GtkWidget *widget)
5050 {
5051   gtk_text_view_do_popup (GTK_TEXT_VIEW (widget), NULL);
5052 }
5053
5054 /* Child GdkWindows */
5055
5056
5057 static GtkTextWindow*
5058 text_window_new (GtkTextWindowType  type,
5059                  GtkWidget         *widget,
5060                  gint               width_request,
5061                  gint               height_request)
5062 {
5063   GtkTextWindow *win;
5064
5065   win = g_new (GtkTextWindow, 1);
5066
5067   win->type = type;
5068   win->widget = widget;
5069   win->window = NULL;
5070   win->bin_window = NULL;
5071   win->requisition.width = width_request;
5072   win->requisition.height = height_request;
5073   win->allocation.width = width_request;
5074   win->allocation.height = height_request;
5075   win->allocation.x = 0;
5076   win->allocation.y = 0;
5077
5078   return win;
5079 }
5080
5081 static void
5082 text_window_free (GtkTextWindow *win)
5083 {
5084   if (win->window)
5085     text_window_unrealize (win);
5086
5087   g_free (win);
5088 }
5089
5090 static void
5091 text_window_realize (GtkTextWindow *win,
5092                      GdkWindow     *parent)
5093 {
5094   GdkWindowAttr attributes;
5095   gint attributes_mask;
5096   GdkCursor *cursor;
5097
5098   attributes.window_type = GDK_WINDOW_CHILD;
5099   attributes.x = win->allocation.x;
5100   attributes.y = win->allocation.y;
5101   attributes.width = win->allocation.width;
5102   attributes.height = win->allocation.height;
5103   attributes.wclass = GDK_INPUT_OUTPUT;
5104   attributes.visual = gtk_widget_get_visual (win->widget);
5105   attributes.colormap = gtk_widget_get_colormap (win->widget);
5106   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK;
5107
5108   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
5109
5110   win->window = gdk_window_new (parent,
5111                                 &attributes,
5112                                 attributes_mask);
5113
5114   gdk_window_show (win->window);
5115   gdk_window_set_user_data (win->window, win->widget);
5116
5117   attributes.x = 0;
5118   attributes.y = 0;
5119   attributes.width = win->allocation.width;
5120   attributes.height = win->allocation.height;
5121   attributes.event_mask = (GDK_EXPOSURE_MASK            |
5122                            GDK_SCROLL_MASK              |
5123                            GDK_KEY_PRESS_MASK           |
5124                            GDK_BUTTON_PRESS_MASK        |
5125                            GDK_BUTTON_RELEASE_MASK      |
5126                            GDK_POINTER_MOTION_MASK      |
5127                            GDK_POINTER_MOTION_HINT_MASK |
5128                            gtk_widget_get_events (win->widget));
5129
5130   win->bin_window = gdk_window_new (win->window,
5131                                     &attributes,
5132                                     attributes_mask);
5133
5134   gdk_window_show (win->bin_window);
5135   gdk_window_set_user_data (win->bin_window, win->widget);
5136
5137   if (win->type == GTK_TEXT_WINDOW_TEXT)
5138     {
5139       /* I-beam cursor */
5140       cursor = gdk_cursor_new (GDK_XTERM);
5141       gdk_window_set_cursor (win->bin_window, cursor);
5142       gdk_cursor_destroy (cursor);
5143
5144       gtk_im_context_set_client_window (GTK_TEXT_VIEW (win->widget)->im_context,
5145                                         win->window);
5146
5147
5148       gdk_window_set_background (win->bin_window,
5149                                  &win->widget->style->base[GTK_WIDGET_STATE (win->widget)]);
5150     }
5151   else
5152     {
5153       gdk_window_set_background (win->bin_window,
5154                                  &win->widget->style->bg[GTK_WIDGET_STATE (win->widget)]);
5155     }
5156
5157   g_object_set_qdata (G_OBJECT (win->window),
5158                       g_quark_from_static_string ("gtk-text-view-text-window"),
5159                       win);
5160
5161   g_object_set_qdata (G_OBJECT (win->bin_window),
5162                       g_quark_from_static_string ("gtk-text-view-text-window"),
5163                       win);
5164 }
5165
5166 static void
5167 text_window_unrealize (GtkTextWindow *win)
5168 {
5169   if (win->type == GTK_TEXT_WINDOW_TEXT)
5170     {
5171       gtk_im_context_set_client_window (GTK_TEXT_VIEW (win->widget)->im_context,
5172                                         NULL);
5173     }
5174
5175   gdk_window_set_user_data (win->window, NULL);
5176   gdk_window_set_user_data (win->bin_window, NULL);
5177   gdk_window_destroy (win->bin_window);
5178   gdk_window_destroy (win->window);
5179   win->window = NULL;
5180   win->bin_window = NULL;
5181 }
5182
5183 static void
5184 text_window_size_allocate (GtkTextWindow *win,
5185                            GdkRectangle  *rect)
5186 {
5187   win->allocation = *rect;
5188
5189   if (win->window)
5190     {
5191       gdk_window_move_resize (win->window,
5192                               rect->x, rect->y,
5193                               rect->width, rect->height);
5194
5195       gdk_window_resize (win->bin_window,
5196                          rect->width, rect->height);
5197     }
5198 }
5199
5200 static void
5201 text_window_scroll        (GtkTextWindow *win,
5202                            gint           dx,
5203                            gint           dy)
5204 {
5205   if (dx != 0 || dy != 0)
5206     {
5207       gdk_window_scroll (win->bin_window, dx, dy);
5208     }
5209 }
5210
5211 void
5212 text_window_invalidate_rect (GtkTextWindow *win,
5213                              GdkRectangle  *rect)
5214 {
5215   GdkRectangle window_rect;
5216
5217   gtk_text_view_buffer_to_window_coords (GTK_TEXT_VIEW (win->widget),
5218                                          win->type,
5219                                          rect->x,
5220                                          rect->y,
5221                                          &window_rect.x,
5222                                          &window_rect.y);
5223
5224   window_rect.width = rect->width;
5225   window_rect.height = rect->height;
5226
5227   /* Adjust the rect as appropriate */
5228
5229   switch (win->type)
5230     {
5231     case GTK_TEXT_WINDOW_TEXT:
5232       break;
5233
5234     case GTK_TEXT_WINDOW_LEFT:
5235     case GTK_TEXT_WINDOW_RIGHT:
5236       window_rect.x = 0;
5237       window_rect.width = win->allocation.width;
5238       break;
5239
5240     case GTK_TEXT_WINDOW_TOP:
5241     case GTK_TEXT_WINDOW_BOTTOM:
5242       window_rect.y = 0;
5243       window_rect.height = win->allocation.height;
5244       break;
5245
5246     default:
5247       g_warning ("%s: bug!", G_STRLOC);
5248       return;
5249       break;
5250     }
5251
5252   gdk_window_invalidate_rect (win->bin_window, &window_rect, FALSE);
5253
5254 #if 0
5255   {
5256     GdkColor color = { 0, 65535, 0, 0 };
5257     GdkGC *gc = gdk_gc_new (win->bin_window);
5258     gdk_gc_set_rgb_fg_color (gc, &color);
5259     gdk_draw_rectangle (win->bin_window,
5260                         gc, TRUE, window_rect.x, window_rect.y,
5261                         window_rect.width, window_rect.height);
5262     gdk_gc_unref (gc);
5263   }
5264 #endif
5265 }
5266
5267 static gint
5268 text_window_get_width (GtkTextWindow *win)
5269 {
5270   return win->allocation.width;
5271 }
5272
5273 static gint
5274 text_window_get_height (GtkTextWindow *win)
5275 {
5276   return win->allocation.height;
5277 }
5278
5279 static void
5280 text_window_get_allocation (GtkTextWindow *win,
5281                             GdkRectangle  *rect)
5282 {
5283   *rect = win->allocation;
5284 }
5285
5286 /* Windows */
5287
5288
5289 /**
5290  * gtk_text_view_get_window:
5291  * @text_view: a #GtkTextView
5292  * @win: window to get
5293  *
5294  * Retrieves the #GdkWindow corresponding to an area of the text view;
5295  * possible windows include the overall widget window, child windows
5296  * on the left, right, top, bottom, and the window that displays the
5297  * text buffer. Windows are %NULL and nonexistent if their width or
5298  * height is 0, and are nonexistent before the widget has been
5299  * realized.
5300  *
5301  * Return value: a #GdkWindow, or %NULL
5302  **/
5303 GdkWindow*
5304 gtk_text_view_get_window (GtkTextView *text_view,
5305                           GtkTextWindowType win)
5306 {
5307   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
5308
5309   switch (win)
5310     {
5311     case GTK_TEXT_WINDOW_WIDGET:
5312       return GTK_WIDGET (text_view)->window;
5313       break;
5314
5315     case GTK_TEXT_WINDOW_TEXT:
5316       return text_view->text_window->bin_window;
5317       break;
5318
5319     case GTK_TEXT_WINDOW_LEFT:
5320       if (text_view->left_window)
5321         return text_view->left_window->bin_window;
5322       else
5323         return NULL;
5324       break;
5325
5326     case GTK_TEXT_WINDOW_RIGHT:
5327       if (text_view->right_window)
5328         return text_view->right_window->bin_window;
5329       else
5330         return NULL;
5331       break;
5332
5333     case GTK_TEXT_WINDOW_TOP:
5334       if (text_view->top_window)
5335         return text_view->top_window->bin_window;
5336       else
5337         return NULL;
5338       break;
5339
5340     case GTK_TEXT_WINDOW_BOTTOM:
5341       if (text_view->bottom_window)
5342         return text_view->bottom_window->bin_window;
5343       else
5344         return NULL;
5345       break;
5346
5347     default:
5348       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
5349       return NULL;
5350       break;
5351     }
5352 }
5353
5354 /**
5355  * gtk_text_view_get_window_type:
5356  * @text_view: a #GtkTextView
5357  * @window: a window type
5358  *
5359  * Usually used to find out which window an event corresponds to.
5360  * If you connect to an event signal on @text_view, this function
5361  * should be called on <literal>event-&gt;window</literal> to
5362  * see which window it was.
5363  *
5364  * Return value: the window type.
5365  **/
5366 GtkTextWindowType
5367 gtk_text_view_get_window_type (GtkTextView *text_view,
5368                                GdkWindow   *window)
5369 {
5370   GtkTextWindow *win;
5371
5372   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
5373   g_return_val_if_fail (GDK_IS_WINDOW (text_view), 0);
5374
5375   if (window == GTK_WIDGET (text_view)->window)
5376     return GTK_TEXT_WINDOW_WIDGET;
5377
5378   win = g_object_get_qdata (G_OBJECT (window),
5379                             g_quark_try_string ("gtk-text-view-text-window"));
5380
5381   if (win)
5382     return win->type;
5383   else
5384     {
5385       return GTK_TEXT_WINDOW_PRIVATE;
5386     }
5387 }
5388
5389 static void
5390 buffer_to_widget (GtkTextView      *text_view,
5391                   gint              buffer_x,
5392                   gint              buffer_y,
5393                   gint             *window_x,
5394                   gint             *window_y)
5395 {
5396   if (window_x)
5397     {
5398       *window_x = buffer_x - text_view->xoffset + FOCUS_EDGE_WIDTH;
5399       if (text_view->left_window)
5400         *window_x += text_view->left_window->allocation.width;
5401     }
5402
5403   if (window_y)
5404     {
5405       *window_y = buffer_y - text_view->yoffset + FOCUS_EDGE_WIDTH;
5406       if (text_view->top_window)
5407         *window_y += text_view->top_window->allocation.height;
5408     }
5409 }
5410
5411 static void
5412 widget_to_text_window (GtkTextWindow *win,
5413                        gint           widget_x,
5414                        gint           widget_y,
5415                        gint          *window_x,
5416                        gint          *window_y)
5417 {
5418   if (window_x)
5419     *window_x = widget_x - win->allocation.x;
5420
5421   if (window_y)
5422     *window_y = widget_y - win->allocation.y;
5423 }
5424
5425 static void
5426 buffer_to_text_window (GtkTextView   *text_view,
5427                        GtkTextWindow *win,
5428                        gint           buffer_x,
5429                        gint           buffer_y,
5430                        gint          *window_x,
5431                        gint          *window_y)
5432 {
5433   if (win == NULL)
5434     {
5435       g_warning ("Attempt to convert text buffer coordinates to coordinates "
5436                  "for a nonexistent or private child window of GtkTextView");
5437       return;
5438     }
5439
5440   buffer_to_widget (text_view,
5441                     buffer_x, buffer_y,
5442                     window_x, window_y);
5443
5444   widget_to_text_window (win,
5445                          window_x ? *window_x : 0,
5446                          window_y ? *window_y : 0,
5447                          window_x,
5448                          window_y);
5449 }
5450
5451 /**
5452  * gtk_text_view_buffer_to_window_coords:
5453  * @text_view: a #GtkTextView
5454  * @win: a #GtkTextWindowType
5455  * @buffer_x: buffer x coordinate
5456  * @buffer_y: buffer y coordinate
5457  * @window_x: window x coordinate return location
5458  * @window_y: window y coordinate return location
5459  *
5460  * Converts coordinate (@buffer_x, @buffer_y) to coordinates for the window
5461  * @win, and stores the result in (@window_x, @window_y).
5462  **/
5463 void
5464 gtk_text_view_buffer_to_window_coords (GtkTextView      *text_view,
5465                                        GtkTextWindowType win,
5466                                        gint              buffer_x,
5467                                        gint              buffer_y,
5468                                        gint             *window_x,
5469                                        gint             *window_y)
5470 {
5471   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
5472
5473   switch (win)
5474     {
5475     case GTK_TEXT_WINDOW_WIDGET:
5476       buffer_to_widget (text_view,
5477                         buffer_x, buffer_y,
5478                         window_x, window_y);
5479       break;
5480
5481     case GTK_TEXT_WINDOW_TEXT:
5482       if (window_x)
5483         *window_x = buffer_x - text_view->xoffset;
5484       if (window_y)
5485         *window_y = buffer_y - text_view->yoffset;
5486       break;
5487
5488     case GTK_TEXT_WINDOW_LEFT:
5489       buffer_to_text_window (text_view,
5490                              text_view->left_window,
5491                              buffer_x, buffer_y,
5492                              window_x, window_y);
5493       break;
5494
5495     case GTK_TEXT_WINDOW_RIGHT:
5496       buffer_to_text_window (text_view,
5497                              text_view->right_window,
5498                              buffer_x, buffer_y,
5499                              window_x, window_y);
5500       break;
5501
5502     case GTK_TEXT_WINDOW_TOP:
5503       buffer_to_text_window (text_view,
5504                              text_view->top_window,
5505                              buffer_x, buffer_y,
5506                              window_x, window_y);
5507       break;
5508
5509     case GTK_TEXT_WINDOW_BOTTOM:
5510       buffer_to_text_window (text_view,
5511                              text_view->bottom_window,
5512                              buffer_x, buffer_y,
5513                              window_x, window_y);
5514       break;
5515
5516     case GTK_TEXT_WINDOW_PRIVATE:
5517       g_warning ("%s: can't get coords for private windows", G_STRLOC);
5518       break;
5519
5520     default:
5521       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
5522       break;
5523     }
5524 }
5525
5526 static void
5527 widget_to_buffer (GtkTextView *text_view,
5528                   gint         widget_x,
5529                   gint         widget_y,
5530                   gint        *buffer_x,
5531                   gint        *buffer_y)
5532 {
5533   if (buffer_x)
5534     {
5535       *buffer_x = widget_x - FOCUS_EDGE_WIDTH + text_view->xoffset;
5536       if (text_view->left_window)
5537         *buffer_x -= text_view->left_window->allocation.width;
5538     }
5539
5540   if (buffer_y)
5541     {
5542       *buffer_y = widget_y - FOCUS_EDGE_WIDTH + text_view->yoffset;
5543       if (text_view->top_window)
5544         *buffer_y -= text_view->top_window->allocation.height;
5545     }
5546 }
5547
5548 static void
5549 text_window_to_widget (GtkTextWindow *win,
5550                        gint           window_x,
5551                        gint           window_y,
5552                        gint          *widget_x,
5553                        gint          *widget_y)
5554 {
5555   if (widget_x)
5556     *widget_x = window_x + win->allocation.x;
5557
5558   if (widget_y)
5559     *widget_y = window_y + win->allocation.y;
5560 }
5561
5562 static void
5563 text_window_to_buffer (GtkTextView   *text_view,
5564                        GtkTextWindow *win,
5565                        gint           window_x,
5566                        gint           window_y,
5567                        gint          *buffer_x,
5568                        gint          *buffer_y)
5569 {
5570   if (win == NULL)
5571     {
5572       g_warning ("Attempt to convert GtkTextView buffer coordinates into "
5573                  "coordinates for a nonexistent child window.");
5574       return;
5575     }
5576
5577   text_window_to_widget (win,
5578                          window_x,
5579                          window_y,
5580                          buffer_x,
5581                          buffer_y);
5582
5583   widget_to_buffer (text_view,
5584                     buffer_x ? *buffer_x : 0,
5585                     buffer_y ? *buffer_y : 0,
5586                     buffer_x,
5587                     buffer_y);
5588 }
5589
5590 /**
5591  * gtk_text_view_window_to_buffer_coords:
5592  * @text_view: a #GtkTextView
5593  * @win: a #GtkTextWindowType
5594  * @window_x: window x coordinate
5595  * @window_y: window y coordinate
5596  * @buffer_x: buffer x coordinate return location
5597  * @buffer_y: buffer y coordinate return location
5598  *
5599  * Converts coordinates on the window identified by @win to buffer
5600  * coordinates, storing the result in (@buffer_x,@buffer_y).
5601  **/
5602 void
5603 gtk_text_view_window_to_buffer_coords (GtkTextView      *text_view,
5604                                        GtkTextWindowType win,
5605                                        gint              window_x,
5606                                        gint              window_y,
5607                                        gint             *buffer_x,
5608                                        gint             *buffer_y)
5609 {
5610   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
5611
5612   switch (win)
5613     {
5614     case GTK_TEXT_WINDOW_WIDGET:
5615       widget_to_buffer (text_view,
5616                         window_x, window_y,
5617                         buffer_x, buffer_y);
5618       break;
5619
5620     case GTK_TEXT_WINDOW_TEXT:
5621       if (buffer_x)
5622         *buffer_x = window_x + text_view->xoffset;
5623       if (buffer_y)
5624         *buffer_y = window_y + text_view->yoffset;
5625       break;
5626
5627     case GTK_TEXT_WINDOW_LEFT:
5628       text_window_to_buffer (text_view,
5629                              text_view->left_window,
5630                              window_x, window_y,
5631                              buffer_x, buffer_y);
5632       break;
5633
5634     case GTK_TEXT_WINDOW_RIGHT:
5635       text_window_to_buffer (text_view,
5636                              text_view->right_window,
5637                              window_x, window_y,
5638                              buffer_x, buffer_y);
5639       break;
5640
5641     case GTK_TEXT_WINDOW_TOP:
5642       text_window_to_buffer (text_view,
5643                              text_view->top_window,
5644                              window_x, window_y,
5645                              buffer_x, buffer_y);
5646       break;
5647
5648     case GTK_TEXT_WINDOW_BOTTOM:
5649       text_window_to_buffer (text_view,
5650                              text_view->bottom_window,
5651                              window_x, window_y,
5652                              buffer_x, buffer_y);
5653       break;
5654
5655     case GTK_TEXT_WINDOW_PRIVATE:
5656       g_warning ("%s: can't get coords for private windows", G_STRLOC);
5657       break;
5658
5659     default:
5660       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
5661       break;
5662     }
5663 }
5664
5665 static void
5666 set_window_width (GtkTextView      *text_view,
5667                   gint              width,
5668                   GtkTextWindowType type,
5669                   GtkTextWindow   **winp)
5670 {
5671   if (width == 0)
5672     {
5673       if (*winp)
5674         {
5675           text_window_free (*winp);
5676           *winp = NULL;
5677           gtk_widget_queue_resize (GTK_WIDGET (text_view));
5678         }
5679     }
5680   else
5681     {
5682       if (*winp == NULL)
5683         {
5684           *winp = text_window_new (type,
5685                                    GTK_WIDGET (text_view),
5686                                    width, 0);
5687           /* if the widget is already realized we need to realize the child manually */
5688           if (GTK_WIDGET_REALIZED (text_view))
5689             text_window_realize (*winp,
5690                          GTK_WIDGET(text_view)->window);
5691         }
5692       else
5693         {
5694           if ((*winp)->requisition.width == width)
5695             return;
5696         }
5697
5698       gtk_widget_queue_resize (GTK_WIDGET (text_view));
5699     }
5700 }
5701
5702
5703 static void
5704 set_window_height (GtkTextView      *text_view,
5705                    gint              height,
5706                    GtkTextWindowType type,
5707                    GtkTextWindow   **winp)
5708 {
5709   if (height == 0)
5710     {
5711       if (*winp)
5712         {
5713           text_window_free (*winp);
5714           *winp = NULL;
5715           gtk_widget_queue_resize (GTK_WIDGET (text_view));
5716         }
5717     }
5718   else
5719     {
5720       if (*winp == NULL)
5721         {
5722           *winp = text_window_new (type,
5723                                    GTK_WIDGET (text_view),
5724                                    0, height);
5725
5726           /* if the widget is already realized we need to realize the child manually */
5727           if (GTK_WIDGET_REALIZED (text_view))
5728             text_window_realize (*winp,
5729                          GTK_WIDGET(text_view)->window);
5730         }
5731       else
5732         {
5733           if ((*winp)->requisition.height == height)
5734             return;
5735         }
5736
5737       gtk_widget_queue_resize (GTK_WIDGET (text_view));
5738     }
5739 }
5740
5741 /**
5742  * gtk_text_view_set_border_window_size:
5743  * @text_view: a #GtkTextView
5744  * @type: window to affect
5745  * @size: width or height of the window
5746  *
5747  * Sets the width of %GTK_TEXT_WINDOW_LEFT or %GTK_TEXT_WINDOW_RIGHT,
5748  * or the height of %GTK_TEXT_WINDOW_TOP or %GTK_TEXT_WINDOW_BOTTOM.
5749  * Automatically destroys the corresponding window if the size is set to 0,
5750  * and creates the window if the size is set to non-zero.
5751  **/
5752 void
5753 gtk_text_view_set_border_window_size (GtkTextView      *text_view,
5754                                       GtkTextWindowType type,
5755                                       gint              size)
5756
5757 {
5758   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
5759   g_return_if_fail (size >= 0);
5760   g_return_if_fail (type != GTK_TEXT_WINDOW_WIDGET);
5761   g_return_if_fail (type != GTK_TEXT_WINDOW_TEXT);
5762
5763   switch (type)
5764     {
5765     case GTK_TEXT_WINDOW_LEFT:
5766       set_window_width (text_view, size, GTK_TEXT_WINDOW_LEFT,
5767                         &text_view->left_window);
5768       break;
5769
5770     case GTK_TEXT_WINDOW_RIGHT:
5771       set_window_width (text_view, size, GTK_TEXT_WINDOW_RIGHT,
5772                         &text_view->right_window);
5773       break;
5774
5775     case GTK_TEXT_WINDOW_TOP:
5776       set_window_height (text_view, size, GTK_TEXT_WINDOW_TOP,
5777                          &text_view->top_window);
5778       break;
5779
5780     case GTK_TEXT_WINDOW_BOTTOM:
5781       set_window_height (text_view, size, GTK_TEXT_WINDOW_BOTTOM,
5782                          &text_view->bottom_window);
5783       break;
5784
5785     default:
5786       g_warning ("Can't set size of center or widget or private GtkTextWindowType in %s", G_STRLOC);
5787       break;
5788     }
5789 }
5790
5791 /**
5792  * gtk_text_view_set_text_window_size:
5793  * @text_view: a #GtkTextView
5794  * @width: a width in pixels
5795  * @height: a height in pixels
5796  *
5797  * Sets the size request for the main text window (%GTK_TEXT_WINDOW_TEXT).
5798  * If the widget gets more space than it requested, the main text window
5799  * will be larger than this.
5800  *
5801  **/
5802 void
5803 gtk_text_view_set_text_window_size (GtkTextView *text_view,
5804                                     gint         width,
5805                                     gint         height)
5806 {
5807   GtkTextWindow *win;
5808
5809   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
5810   g_return_if_fail (width > 0);
5811   g_return_if_fail (height > 0);
5812
5813   win = text_view->text_window;
5814
5815   if (win->requisition.width == width &&
5816       win->requisition.height == height)
5817     return;
5818
5819   win->requisition.width = width;
5820   win->requisition.height = height;
5821
5822   gtk_widget_queue_resize (GTK_WIDGET (text_view));
5823 }
5824
5825 /*
5826  * Child widgets
5827  */
5828
5829 static GtkTextViewChild*
5830 text_view_child_new_anchored (GtkWidget          *child,
5831                               GtkTextChildAnchor *anchor,
5832                               GtkTextLayout      *layout)
5833 {
5834   GtkTextViewChild *vc;
5835
5836   vc = g_new (GtkTextViewChild, 1);
5837
5838   vc->widget = child;
5839   vc->anchor = anchor;
5840
5841   vc->from_top_of_line = 0;
5842   vc->from_left_of_buffer = 0;
5843
5844   g_object_ref (G_OBJECT (vc->widget));
5845   g_object_ref (G_OBJECT (vc->anchor));
5846
5847   g_object_set_data (G_OBJECT (child),
5848                      "gtk-text-view-child",
5849                      vc);
5850
5851   gtk_text_child_anchor_register_child (anchor, child, layout);
5852
5853   return vc;
5854 }
5855
5856 static GtkTextViewChild*
5857 text_view_child_new_window (GtkWidget          *child,
5858                             GtkTextWindowType   type,
5859                             gint                x,
5860                             gint                y)
5861 {
5862   GtkTextViewChild *vc;
5863
5864   vc = g_new (GtkTextViewChild, 1);
5865
5866   vc->widget = child;
5867   vc->anchor = NULL;
5868
5869   vc->from_top_of_line = 0;
5870   vc->from_left_of_buffer = 0;
5871
5872   g_object_ref (G_OBJECT (vc->widget));
5873
5874   vc->type = type;
5875   vc->x = x;
5876   vc->y = y;
5877
5878   return vc;
5879 }
5880
5881 static void
5882 text_view_child_free (GtkTextViewChild *child)
5883 {
5884   g_object_set_data (G_OBJECT (child->widget),
5885                      "gtk-text-view-child", NULL);
5886
5887   if (child->anchor)
5888     {
5889       gtk_text_child_anchor_unregister_child (child->anchor,
5890                                               child->widget);
5891       g_object_unref (G_OBJECT (child->anchor));
5892     }
5893
5894   g_object_unref (G_OBJECT (child->widget));
5895
5896   g_free (child);
5897 }
5898
5899 static void
5900 text_view_child_realize (GtkTextView      *text_view,
5901                          GtkTextViewChild *vc)
5902 {
5903   if (vc->anchor)
5904     gtk_widget_set_parent_window (vc->widget,
5905                                   text_view->text_window->bin_window);
5906   else
5907     {
5908       GdkWindow *window;
5909       window = gtk_text_view_get_window (text_view,
5910                                          vc->type);
5911       gtk_widget_set_parent_window (vc->widget, window);
5912     }
5913
5914   gtk_widget_realize (vc->widget);
5915 }
5916
5917 static void
5918 add_child (GtkTextView      *text_view,
5919            GtkTextViewChild *vc)
5920 {
5921   text_view->children = g_slist_prepend (text_view->children,
5922                                          vc);
5923
5924   gtk_widget_set_parent (vc->widget, GTK_WIDGET (text_view));
5925
5926   if (GTK_WIDGET_REALIZED (text_view))
5927     text_view_child_realize (text_view, vc);
5928
5929   if (GTK_WIDGET_VISIBLE (text_view) && GTK_WIDGET_VISIBLE (vc->widget))
5930     {
5931       if (GTK_WIDGET_MAPPED (text_view))
5932         gtk_widget_map (vc->widget);
5933
5934       gtk_widget_queue_resize (vc->widget);
5935     }
5936 }
5937
5938 void
5939 gtk_text_view_add_child_at_anchor (GtkTextView          *text_view,
5940                                    GtkWidget            *child,
5941                                    GtkTextChildAnchor   *anchor)
5942 {
5943   GtkTextViewChild *vc;
5944
5945   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
5946   g_return_if_fail (GTK_IS_WIDGET (child));
5947   g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
5948   g_return_if_fail (child->parent == NULL);
5949
5950   gtk_text_view_ensure_layout (text_view);
5951
5952   vc = text_view_child_new_anchored (child, anchor,
5953                                      text_view->layout);
5954
5955   add_child (text_view, vc);
5956 }
5957
5958 void
5959 gtk_text_view_add_child_in_window (GtkTextView          *text_view,
5960                                    GtkWidget            *child,
5961                                    GtkTextWindowType     which_window,
5962                                    gint                  xpos,
5963                                    gint                  ypos)
5964 {
5965   GtkTextViewChild *vc;
5966
5967   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
5968   g_return_if_fail (GTK_IS_WIDGET (child));
5969   g_return_if_fail (xpos >= 0);
5970   g_return_if_fail (ypos >= 0);
5971   g_return_if_fail (child->parent == NULL);
5972
5973   vc = text_view_child_new_window (child, which_window,
5974                                    xpos, ypos);
5975
5976   add_child (text_view, vc);
5977 }
5978
5979 void
5980 gtk_text_view_move_child          (GtkTextView          *text_view,
5981                                    GtkWidget            *child,
5982                                    gint                  xpos,
5983                                    gint                  ypos)
5984 {
5985   GtkTextViewChild *vc;
5986
5987   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
5988   g_return_if_fail (GTK_IS_WIDGET (child));
5989   g_return_if_fail (xpos >= 0);
5990   g_return_if_fail (ypos >= 0);
5991   g_return_if_fail (child->parent == (GtkWidget*) text_view);
5992
5993   vc = g_object_get_data (G_OBJECT (child),
5994                           "gtk-text-view-child");
5995
5996   g_assert (vc != NULL);
5997
5998   vc->x = xpos;
5999   vc->y = ypos;
6000
6001   if (GTK_WIDGET_VISIBLE (child) && GTK_WIDGET_VISIBLE (text_view))
6002     gtk_widget_queue_resize (child);
6003 }
6004
6005
6006
6007 /* Iterator operations */
6008
6009 gboolean
6010 gtk_text_view_forward_display_line (GtkTextView *text_view,
6011                                     GtkTextIter *iter)
6012 {
6013   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6014   g_return_val_if_fail (iter != NULL, FALSE);
6015
6016   gtk_text_view_ensure_layout (text_view);
6017
6018   return gtk_text_layout_move_iter_to_next_line (text_view->layout, iter);
6019 }
6020
6021 gboolean
6022 gtk_text_view_backward_display_line (GtkTextView *text_view,
6023                                      GtkTextIter *iter)
6024 {
6025   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6026   g_return_val_if_fail (iter != NULL, FALSE);
6027
6028   gtk_text_view_ensure_layout (text_view);
6029
6030   return gtk_text_layout_move_iter_to_previous_line (text_view->layout, iter);
6031 }
6032
6033 gboolean
6034 gtk_text_view_forward_display_line_end (GtkTextView *text_view,
6035                                         GtkTextIter *iter)
6036 {
6037   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6038   g_return_val_if_fail (iter != NULL, FALSE);
6039
6040   gtk_text_view_ensure_layout (text_view);
6041
6042   return gtk_text_layout_move_iter_to_line_end (text_view->layout, iter, 1);
6043 }
6044
6045 gboolean
6046 gtk_text_view_backward_display_line_start (GtkTextView *text_view,
6047                                            GtkTextIter *iter)
6048 {
6049   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6050   g_return_val_if_fail (iter != NULL, FALSE);
6051
6052   gtk_text_view_ensure_layout (text_view);
6053
6054   return gtk_text_layout_move_iter_to_line_end (text_view->layout, iter, -1);
6055 }
6056
6057 gboolean
6058 gtk_text_view_starts_display_line (GtkTextView       *text_view,
6059                                    const GtkTextIter *iter)
6060 {
6061   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6062   g_return_val_if_fail (iter != NULL, FALSE);
6063
6064   gtk_text_view_ensure_layout (text_view);
6065
6066   return gtk_text_layout_iter_starts_line (text_view->layout, iter);
6067 }
6068
6069 gboolean
6070 gtk_text_view_move_visually (GtkTextView *text_view,
6071                              GtkTextIter *iter,
6072                              gint         count)
6073 {
6074   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
6075   g_return_val_if_fail (iter != NULL, FALSE);
6076
6077   gtk_text_view_ensure_layout (text_view);
6078
6079   return gtk_text_layout_move_iter_visually (text_view->layout, iter, count);
6080 }
6081
6082