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 "gtksignal.h"
  36 #include "gtktext.h"
  37 #include "gtktextdisplay.h"
  38 #include "gtktextview.h"
  39 #include "gtkimmulticontext.h"
  40 #include "gdk/gdkkeysyms.h"
  41 #include <string.h>
  42
  43 #define FOCUS_EDGE_WIDTH 1
  44 #define DRAG_THRESHOLD 8
  45
  46 #define SCREEN_WIDTH(widget) text_window_get_width (GTK_TEXT_VIEW (widget)->text_window)
  47 #define SCREEN_HEIGHT(widget) text_window_get_height (GTK_TEXT_VIEW (widget)->text_window)
  48
  49 enum
  50 {
  51   MOVE_CURSOR,
  52   SET_ANCHOR,
  53   INSERT_AT_CURSOR,
  54   DELETE_FROM_CURSOR,
  55   CUT_CLIPBOARD,
  56   COPY_CLIPBOARD,
  57   PASTE_CLIPBOARD,
  58   TOGGLE_OVERWRITE,
  59   SET_SCROLL_ADJUSTMENTS,
  60   LAST_SIGNAL
  61 };
  62
  63 enum
  64 {
  65   ARG_0,
  66   ARG_HEIGHT_LINES,
  67   ARG_WIDTH_COLUMNS,
  68   ARG_PIXELS_ABOVE_LINES,
  69   ARG_PIXELS_BELOW_LINES,
  70   ARG_PIXELS_INSIDE_WRAP,
  71   ARG_EDITABLE,
  72   ARG_WRAP_MODE,
  73   ARG_JUSTIFY,
  74   ARG_LEFT_MARGIN,
  75   ARG_RIGHT_MARGIN,
  76   ARG_INDENT,
  77   ARG_TABS,
  78   LAST_ARG
  79 };
  80
  81 static void gtk_text_view_init                 (GtkTextView      *text_view);
  82 static void gtk_text_view_class_init           (GtkTextViewClass *klass);
  83 static void gtk_text_view_destroy              (GtkObject        *object);
  84 static void gtk_text_view_finalize             (GObject          *object);
  85 static void gtk_text_view_set_arg              (GtkObject        *object,
  86                                                 GtkArg           *arg,
  87                                                 guint             arg_id);
  88 static void gtk_text_view_get_arg              (GtkObject        *object,
  89                                                 GtkArg           *arg,
  90                                                 guint             arg_id);
  91 static void gtk_text_view_size_request         (GtkWidget        *widget,
  92                                                 GtkRequisition   *requisition);
  93 static void gtk_text_view_size_allocate        (GtkWidget        *widget,
  94                                                 GtkAllocation    *allocation);
  95 static void gtk_text_view_realize              (GtkWidget        *widget);
  96 static void gtk_text_view_unrealize            (GtkWidget        *widget);
  97 static void gtk_text_view_style_set            (GtkWidget        *widget,
  98                                                 GtkStyle         *previous_style);
  99 static void gtk_text_view_direction_changed    (GtkWidget        *widget,
 100                                                 GtkTextDirection  previous_direction);
 101 static gint gtk_text_view_event                (GtkWidget        *widget,
 102                                                 GdkEvent         *event);
 103 static gint gtk_text_view_key_press_event      (GtkWidget        *widget,
 104                                                 GdkEventKey      *event);
 105 static gint gtk_text_view_key_release_event    (GtkWidget        *widget,
 106                                                 GdkEventKey      *event);
 107 static gint gtk_text_view_button_press_event   (GtkWidget        *widget,
 108                                                 GdkEventButton   *event);
 109 static gint gtk_text_view_button_release_event (GtkWidget        *widget,
 110                                                 GdkEventButton   *event);
 111 static gint gtk_text_view_focus_in_event       (GtkWidget        *widget,
 112                                                 GdkEventFocus    *event);
 113 static gint gtk_text_view_focus_out_event      (GtkWidget        *widget,
 114                                                 GdkEventFocus    *event);
 115 static gint gtk_text_view_motion_event         (GtkWidget        *widget,
 116                                                 GdkEventMotion   *event);
 117 static void gtk_text_view_draw                 (GtkWidget        *widget,
 118                                                 GdkRectangle     *area);
 119 static gint gtk_text_view_expose_event         (GtkWidget        *widget,
 120                                                 GdkEventExpose   *expose);
 121 static void gtk_text_view_draw_focus           (GtkWidget        *widget);
 122
 123 /* Source side drag signals */
 124 static void gtk_text_view_drag_begin       (GtkWidget        *widget,
 125                                             GdkDragContext   *context);
 126 static void gtk_text_view_drag_end         (GtkWidget        *widget,
 127                                             GdkDragContext   *context);
 128 static void gtk_text_view_drag_data_get    (GtkWidget        *widget,
 129                                             GdkDragContext   *context,
 130                                             GtkSelectionData *selection_data,
 131                                             guint             info,
 132                                             guint             time);
 133 static void gtk_text_view_drag_data_delete (GtkWidget        *widget,
 134                                             GdkDragContext   *context);
 135
 136 /* Target side drag signals */
 137 static void     gtk_text_view_drag_leave         (GtkWidget        *widget,
 138                                                   GdkDragContext   *context,
 139                                                   guint             time);
 140 static gboolean gtk_text_view_drag_motion        (GtkWidget        *widget,
 141                                                   GdkDragContext   *context,
 142                                                   gint              x,
 143                                                   gint              y,
 144                                                   guint             time);
 145 static gboolean gtk_text_view_drag_drop          (GtkWidget        *widget,
 146                                                   GdkDragContext   *context,
 147                                                   gint              x,
 148                                                   gint              y,
 149                                                   guint             time);
 150 static void     gtk_text_view_drag_data_received (GtkWidget        *widget,
 151                                                   GdkDragContext   *context,
 152                                                   gint              x,
 153                                                   gint              y,
 154                                                   GtkSelectionData *selection_data,
 155                                                   guint             info,
 156                                                   guint             time);
 157
 158 static void gtk_text_view_set_scroll_adjustments (GtkTextView   *text_view,
 159                                                   GtkAdjustment *hadj,
 160                                                   GtkAdjustment *vadj);
 161
 162 static void gtk_text_view_move_cursor      (GtkTextView           *text_view,
 163                                             GtkMovementStep        step,
 164                                             gint                   count,
 165                                             gboolean               extend_selection);
 166 static void gtk_text_view_set_anchor       (GtkTextView           *text_view);
 167 static void gtk_text_view_scroll_pages     (GtkTextView           *text_view,
 168                                             gint                   count);
 169 static void gtk_text_view_insert_at_cursor (GtkTextView           *text_view,
 170                                             const gchar           *str);
 171 static void gtk_text_view_delete_from_cursor (GtkTextView           *text_view,
 172                                               GtkDeleteType          type,
 173                                               gint                   count);
 174 static void gtk_text_view_cut_clipboard    (GtkTextView           *text_view);
 175 static void gtk_text_view_copy_clipboard   (GtkTextView           *text_view);
 176 static void gtk_text_view_paste_clipboard  (GtkTextView           *text_view);
 177 static void gtk_text_view_toggle_overwrite (GtkTextView           *text_view);
 178 static void gtk_text_view_unselect         (GtkTextView           *text_view);
 179
 180 static void     gtk_text_view_validate_onscreen     (GtkTextView        *text_view);
 181 static void     gtk_text_view_get_first_para_iter   (GtkTextView        *text_view,
 182                                                      GtkTextIter        *iter);
 183 static void     gtk_text_view_scroll_calc_now       (GtkTextView        *text_view);
 184 static void     gtk_text_view_set_attributes_from_style (GtkTextView        *text_view,
 185                                                          GtkTextAttributes *values,
 186                                                          GtkStyle           *style);
 187 static void     gtk_text_view_ensure_layout         (GtkTextView        *text_view);
 188 static void     gtk_text_view_destroy_layout        (GtkTextView        *text_view);
 189 static void     gtk_text_view_reset_im_context      (GtkTextView        *text_view);
 190 static void     gtk_text_view_start_selection_drag  (GtkTextView        *text_view,
 191                                                      const GtkTextIter  *iter,
 192                                                      GdkEventButton     *event);
 193 static gboolean gtk_text_view_end_selection_drag    (GtkTextView        *text_view,
 194                                                      GdkEventButton     *event);
 195 static void     gtk_text_view_start_selection_dnd   (GtkTextView        *text_view,
 196                                                      const GtkTextIter  *iter,
 197                                                      GdkEventMotion     *event);
 198 static void     gtk_text_view_start_cursor_blink    (GtkTextView        *text_view);
 199 static void     gtk_text_view_stop_cursor_blink     (GtkTextView        *text_view);
 200
 201 static void gtk_text_view_value_changed           (GtkAdjustment *adj,
 202                                                    GtkTextView   *view);
 203 static void gtk_text_view_commit_handler          (GtkIMContext  *context,
 204                                                    const gchar   *str,
 205                                                    GtkTextView   *text_view);
 206 static void gtk_text_view_preedit_changed_handler (GtkIMContext  *context,
 207                                                    GtkTextView   *text_view);
 208
 209 static void gtk_text_view_mark_set_handler       (GtkTextBuffer     *buffer,
 210                                                   const GtkTextIter *location,
 211                                                   GtkTextMark       *mark,
 212                                                   gpointer           data);
 213 static void gtk_text_view_get_virtual_cursor_pos (GtkTextView       *text_view,
 214                                                   gint              *x,
 215                                                   gint              *y);
 216 static void gtk_text_view_set_virtual_cursor_pos (GtkTextView       *text_view,
 217                                                   gint               x,
 218                                                   gint               y);
 219
 220 static GtkAdjustment* get_hadjustment            (GtkTextView       *text_view);
 221 static GtkAdjustment* get_vadjustment            (GtkTextView       *text_view);
 222
 223 static void gtk_text_view_popup_menu             (GtkTextView       *text_view,
 224                                                   GdkEventButton    *event);
 225
 226 /* Container methods */
 227 static void gtk_text_view_add    (GtkContainer *container,
 228                                   GtkWidget    *child);
 229 static void gtk_text_view_remove (GtkContainer *container,
 230                                   GtkWidget    *child);
 231 static void gtk_text_view_forall (GtkContainer *container,
 232                                   gboolean      include_internals,
 233                                   GtkCallback   callback,
 234                                   gpointer      callback_data);
 235
 236 /* FIXME probably need the focus methods. */
 237
 238 typedef struct _GtkTextViewChild GtkTextViewChild;
 239
 240 struct _GtkTextViewChild
 241 {
 242   GtkWidget *widget;
 243
 244   GtkTextChildAnchor *anchor;
 245
 246   /* These are ignored if anchor != NULL */
 247   GtkTextWindowType type;
 248   gint x;
 249   gint y;
 250 };
 251
 252 static GtkTextViewChild* text_view_child_new_anchored (GtkWidget          *child,
 253                                                        GtkTextChildAnchor *anchor,
 254                                                        GtkTextLayout      *layout);
 255 static GtkTextViewChild* text_view_child_new_window   (GtkWidget          *child,
 256                                                        GtkTextWindowType   type,
 257                                                        gint                x,
 258                                                        gint                y);
 259 static void              text_view_child_free         (GtkTextViewChild   *child);
 260
 261 static void              text_view_child_realize      (GtkTextView      *text_view,
 262                                                        GtkTextViewChild *child);
 263
 264 struct _GtkTextWindow
 265 {
 266   GtkTextWindowType type;
 267   GtkWidget *widget;
 268   GdkWindow *window;
 269   GdkWindow *bin_window;
 270   GtkRequisition requisition;
 271   GdkRectangle allocation;
 272 };
 273
 274 static GtkTextWindow *text_window_new             (GtkTextWindowType  type,
 275                                                    GtkWidget         *widget,
 276                                                    gint               width_request,
 277                                                    gint               height_request);
 278 static void           text_window_free            (GtkTextWindow     *win);
 279 static void           text_window_realize         (GtkTextWindow     *win,
 280                                                    GdkWindow         *parent);
 281 static void           text_window_unrealize       (GtkTextWindow     *win);
 282 static void           text_window_size_allocate   (GtkTextWindow     *win,
 283                                                    GdkRectangle      *rect);
 284 static void           text_window_scroll          (GtkTextWindow     *win,
 285                                                    gint               dx,
 286                                                    gint               dy);
 287 static void           text_window_invalidate_rect (GtkTextWindow     *win,
 288                                                    GdkRectangle      *rect);
 289
 290 static gint           text_window_get_width       (GtkTextWindow     *win);
 291 static gint           text_window_get_height      (GtkTextWindow     *win);
 292 static void           text_window_get_allocation  (GtkTextWindow     *win,
 293                                                    GdkRectangle      *rect);
 294
 295
 296 enum
 297 {
 298   TARGET_STRING,
 299   TARGET_TEXT,
 300   TARGET_COMPOUND_TEXT,
 301   TARGET_UTF8_STRING,
 302   TARGET_TEXT_BUFFER_CONTENTS
 303 };
 304
 305 static GtkTargetEntry target_table[] = {
 306   { "GTK_TEXT_BUFFER_CONTENTS", GTK_TARGET_SAME_APP,
 307     TARGET_TEXT_BUFFER_CONTENTS },
 308   { "UTF8_STRING", 0, TARGET_UTF8_STRING },
 309   { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
 310   { "TEXT", 0, TARGET_TEXT },
 311   { "text/plain", 0, TARGET_STRING },
 312   { "STRING",     0, TARGET_STRING }
 313 };
 314
 315 static GtkContainerClass *parent_class = NULL;
 316 static guint signals[LAST_SIGNAL] = { 0 };
 317
 318 GtkType
 319 gtk_text_view_get_type (void)
 320 {
 321   static GtkType our_type = 0;
 322
 323   if (our_type == 0)
 324     {
 325       static const GtkTypeInfo our_info =
 326       {
 327         "GtkTextView",
 328         sizeof (GtkTextView),
 329         sizeof (GtkTextViewClass),
 330         (GtkClassInitFunc) gtk_text_view_class_init,
 331         (GtkObjectInitFunc) gtk_text_view_init,
 332         /* reserved_1 */ NULL,
 333         /* reserved_2 */ NULL,
 334         (GtkClassInitFunc) NULL
 335       };
 336
 337       our_type = gtk_type_unique (GTK_TYPE_CONTAINER, &our_info);
 338     }
 339
 340   return our_type;
 341 }
 342
 343 static void
 344 add_move_binding (GtkBindingSet  *binding_set,
 345                   guint           keyval,
 346                   guint           modmask,
 347                   GtkMovementStep step,
 348                   gint            count)
 349 {
 350   g_return_if_fail ((modmask & GDK_SHIFT_MASK) == 0);
 351
 352   gtk_binding_entry_add_signal (binding_set, keyval, modmask,
 353                                 "move_cursor", 3,
 354                                 GTK_TYPE_ENUM, step,
 355                                 GTK_TYPE_INT, count,
 356                                 GTK_TYPE_BOOL, FALSE);
 357
 358   /* Selection-extending version */
 359   gtk_binding_entry_add_signal (binding_set, keyval, modmask | GDK_SHIFT_MASK,
 360                                 "move_cursor", 3,
 361                                 GTK_TYPE_ENUM, step,
 362                                 GTK_TYPE_INT, count,
 363                                 GTK_TYPE_BOOL, TRUE);
 364 }
 365
 366 static void
 367 gtk_text_view_class_init (GtkTextViewClass *klass)
 368 {
 369   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 370   GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass);
 371   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 372   GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
 373   GtkBindingSet *binding_set;
 374
 375   parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
 376
 377   /*
 378    * Arguments
 379    */
 380   gtk_object_add_arg_type ("GtkTextView::height_lines", GTK_TYPE_INT,
 381                            GTK_ARG_READWRITE, ARG_HEIGHT_LINES);
 382   gtk_object_add_arg_type ("GtkTextView::width_columns", GTK_TYPE_INT,
 383                            GTK_ARG_READWRITE, ARG_WIDTH_COLUMNS);
 384   gtk_object_add_arg_type ("GtkTextView::pixels_above_lines", GTK_TYPE_INT,
 385                            GTK_ARG_READWRITE, ARG_PIXELS_ABOVE_LINES);
 386   gtk_object_add_arg_type ("GtkTextView::pixels_below_lines", GTK_TYPE_INT,
 387                            GTK_ARG_READWRITE, ARG_PIXELS_BELOW_LINES);
 388   gtk_object_add_arg_type ("GtkTextView::pixels_inside_wrap", GTK_TYPE_INT,
 389                            GTK_ARG_READWRITE, ARG_PIXELS_INSIDE_WRAP);
 390   gtk_object_add_arg_type ("GtkTextView::editable", GTK_TYPE_BOOL,
 391                            GTK_ARG_READWRITE, ARG_EDITABLE);
 392   gtk_object_add_arg_type ("GtkTextView::wrap_mode", GTK_TYPE_ENUM,
 393                            GTK_ARG_READWRITE, ARG_WRAP_MODE);
 394   gtk_object_add_arg_type ("GtkTextView::justify", GTK_TYPE_ENUM,
 395                            GTK_ARG_READWRITE, ARG_JUSTIFY);
 396   gtk_object_add_arg_type ("GtkTextView::left_margin", GTK_TYPE_INT,
 397                            GTK_ARG_READWRITE, ARG_LEFT_MARGIN);
 398   gtk_object_add_arg_type ("GtkTextView::right_margin", GTK_TYPE_INT,
 399                            GTK_ARG_READWRITE, ARG_RIGHT_MARGIN);
 400   gtk_object_add_arg_type ("GtkTextView::indent", GTK_TYPE_INT,
 401                            GTK_ARG_READWRITE, ARG_INDENT);
 402   gtk_object_add_arg_type ("GtkTextView::tabs", GTK_TYPE_POINTER, /* FIXME */
 403                            GTK_ARG_READWRITE, ARG_TABS);
 404
 405   /*
 406    * Signals
 407    */
 408
 409   signals[MOVE_CURSOR] =
 410     gtk_signal_new ("move_cursor",
 411                     GTK_RUN_LAST | GTK_RUN_ACTION,
 412                     GTK_CLASS_TYPE (object_class),
 413                     GTK_SIGNAL_OFFSET (GtkTextViewClass, move_cursor),
 414                     gtk_marshal_VOID__ENUM_INT_BOOLEAN,
 415                     GTK_TYPE_NONE, 3, GTK_TYPE_MOVEMENT_STEP, GTK_TYPE_INT, GTK_TYPE_BOOL);
 416
 417   signals[SET_ANCHOR] =
 418     gtk_signal_new ("set_anchor",
 419                     GTK_RUN_LAST | GTK_RUN_ACTION,
 420                     GTK_CLASS_TYPE (object_class),
 421                     GTK_SIGNAL_OFFSET (GtkTextViewClass, set_anchor),
 422                     gtk_marshal_VOID__VOID,
 423                     GTK_TYPE_NONE, 0);
 424
 425   signals[INSERT_AT_CURSOR] =
 426     gtk_signal_new ("insert_at_cursor",
 427                     GTK_RUN_LAST | GTK_RUN_ACTION,
 428                     GTK_CLASS_TYPE (object_class),
 429                     GTK_SIGNAL_OFFSET (GtkTextViewClass, insert_at_cursor),
 430                     gtk_marshal_VOID__POINTER,
 431                     GTK_TYPE_NONE, 1, GTK_TYPE_STRING);
 432
 433   signals[DELETE_FROM_CURSOR] =
 434     gtk_signal_new ("delete_from_cursor",
 435                     GTK_RUN_LAST | GTK_RUN_ACTION,
 436                     GTK_CLASS_TYPE (object_class),
 437                     GTK_SIGNAL_OFFSET (GtkTextViewClass, delete_from_cursor),
 438                     gtk_marshal_VOID__ENUM_INT,
 439                     GTK_TYPE_NONE, 2, GTK_TYPE_DELETE_TYPE, GTK_TYPE_INT);
 440
 441   signals[CUT_CLIPBOARD] =
 442     gtk_signal_new ("cut_clipboard",
 443                     GTK_RUN_LAST | GTK_RUN_ACTION,
 444                     GTK_CLASS_TYPE (object_class),
 445                     GTK_SIGNAL_OFFSET (GtkTextViewClass, cut_clipboard),
 446                     gtk_marshal_VOID__VOID,
 447                     GTK_TYPE_NONE, 0);
 448
 449   signals[COPY_CLIPBOARD] =
 450     gtk_signal_new ("copy_clipboard",
 451                     GTK_RUN_LAST | GTK_RUN_ACTION,
 452                     GTK_CLASS_TYPE (object_class),
 453                     GTK_SIGNAL_OFFSET (GtkTextViewClass, copy_clipboard),
 454                     gtk_marshal_VOID__VOID,
 455                     GTK_TYPE_NONE, 0);
 456
 457   signals[PASTE_CLIPBOARD] =
 458     gtk_signal_new ("paste_clipboard",
 459                     GTK_RUN_LAST | GTK_RUN_ACTION,
 460                     GTK_CLASS_TYPE (object_class),
 461                     GTK_SIGNAL_OFFSET (GtkTextViewClass, paste_clipboard),
 462                     gtk_marshal_VOID__VOID,
 463                     GTK_TYPE_NONE, 0);
 464
 465   signals[TOGGLE_OVERWRITE] =
 466     gtk_signal_new ("toggle_overwrite",
 467                     GTK_RUN_LAST | GTK_RUN_ACTION,
 468                     GTK_CLASS_TYPE (object_class),
 469                     GTK_SIGNAL_OFFSET (GtkTextViewClass, toggle_overwrite),
 470                     gtk_marshal_VOID__VOID,
 471                     GTK_TYPE_NONE, 0);
 472
 473   signals[SET_SCROLL_ADJUSTMENTS] = widget_class->set_scroll_adjustments_signal =
 474     gtk_signal_new ("set_scroll_adjustments",
 475                     GTK_RUN_LAST,
 476                     GTK_CLASS_TYPE (object_class),
 477                     GTK_SIGNAL_OFFSET (GtkTextViewClass, set_scroll_adjustments),
 478                     gtk_marshal_VOID__POINTER_POINTER,
 479                     GTK_TYPE_NONE, 2, GTK_TYPE_ADJUSTMENT, GTK_TYPE_ADJUSTMENT);
 480
 481   gtk_object_class_add_signals (object_class, signals, LAST_SIGNAL);
 482
 483   /*
 484    * Key bindings
 485    */
 486
 487   binding_set = gtk_binding_set_by_class (klass);
 488
 489   /* Moving the insertion point */
 490   add_move_binding (binding_set, GDK_Right, 0,
 491                     GTK_MOVEMENT_POSITIONS, 1);
 492
 493   add_move_binding (binding_set, GDK_Left, 0,
 494                     GTK_MOVEMENT_POSITIONS, -1);
 495
 496   add_move_binding (binding_set, GDK_f, GDK_CONTROL_MASK,
 497                     GTK_MOVEMENT_CHARS, 1);
 498
 499   add_move_binding (binding_set, GDK_b, GDK_CONTROL_MASK,
 500                     GTK_MOVEMENT_CHARS, -1);
 501
 502   add_move_binding (binding_set, GDK_Right, GDK_CONTROL_MASK,
 503                     GTK_MOVEMENT_WORDS, 1);
 504
 505   add_move_binding (binding_set, GDK_Left, GDK_CONTROL_MASK,
 506                     GTK_MOVEMENT_WORDS, -1);
 507
 508   /* Eventually we want to move by display lines, not paragraphs */
 509   add_move_binding (binding_set, GDK_Up, 0,
 510                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 511
 512   add_move_binding (binding_set, GDK_Down, 0,
 513                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 514
 515   add_move_binding (binding_set, GDK_p, GDK_CONTROL_MASK,
 516                     GTK_MOVEMENT_DISPLAY_LINES, -1);
 517
 518   add_move_binding (binding_set, GDK_n, GDK_CONTROL_MASK,
 519                     GTK_MOVEMENT_DISPLAY_LINES, 1);
 520
 521   add_move_binding (binding_set, GDK_a, GDK_CONTROL_MASK,
 522                     GTK_MOVEMENT_PARAGRAPH_ENDS, -1);
 523
 524   add_move_binding (binding_set, GDK_e, GDK_CONTROL_MASK,
 525                     GTK_MOVEMENT_PARAGRAPH_ENDS, 1);
 526
 527   add_move_binding (binding_set, GDK_f, GDK_MOD1_MASK,
 528                     GTK_MOVEMENT_WORDS, 1);
 529
 530   add_move_binding (binding_set, GDK_b, GDK_MOD1_MASK,
 531                     GTK_MOVEMENT_WORDS, -1);
 532
 533   add_move_binding (binding_set, GDK_Home, 0,
 534                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
 535
 536   add_move_binding (binding_set, GDK_End, 0,
 537                     GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
 538
 539   add_move_binding (binding_set, GDK_Home, GDK_CONTROL_MASK,
 540                     GTK_MOVEMENT_BUFFER_ENDS, -1);
 541
 542   add_move_binding (binding_set, GDK_End, GDK_CONTROL_MASK,
 543                     GTK_MOVEMENT_BUFFER_ENDS, 1);
 544
 545   add_move_binding (binding_set, GDK_Page_Up, 0,
 546                     GTK_MOVEMENT_PAGES, -1);
 547
 548   add_move_binding (binding_set, GDK_Page_Down, 0,
 549                     GTK_MOVEMENT_PAGES, 1);
 550
 551
 552   /* Setting the cut/paste/copy anchor */
 553   gtk_binding_entry_add_signal (binding_set, GDK_space, GDK_CONTROL_MASK,
 554                                 "set_anchor", 0);
 555
 556   /* Deleting text */
 557   gtk_binding_entry_add_signal (binding_set, GDK_Delete, 0,
 558                                 "delete_from_cursor", 2,
 559                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 560                                 GTK_TYPE_INT, 1);
 561
 562   gtk_binding_entry_add_signal (binding_set, GDK_d, GDK_CONTROL_MASK,
 563                                 "delete_from_cursor", 2,
 564                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 565                                 GTK_TYPE_INT, 1);
 566
 567   gtk_binding_entry_add_signal (binding_set, GDK_BackSpace, 0,
 568                                 "delete_from_cursor", 2,
 569                                 GTK_TYPE_ENUM, GTK_DELETE_CHARS,
 570                                 GTK_TYPE_INT, -1);
 571
 572   gtk_binding_entry_add_signal (binding_set, GDK_Delete, GDK_CONTROL_MASK,
 573                                 "delete_from_cursor", 2,
 574                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 575                                 GTK_TYPE_INT, 1);
 576
 577   gtk_binding_entry_add_signal (binding_set, GDK_d, GDK_MOD1_MASK,
 578                                 "delete_from_cursor", 2,
 579                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 580                                 GTK_TYPE_INT, 1);
 581
 582   gtk_binding_entry_add_signal (binding_set, GDK_BackSpace, GDK_CONTROL_MASK,
 583                                 "delete_from_cursor", 2,
 584                                 GTK_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
 585                                 GTK_TYPE_INT, -1);
 586
 587   gtk_binding_entry_add_signal (binding_set, GDK_k, GDK_CONTROL_MASK,
 588                                 "delete_from_cursor", 2,
 589                                 GTK_TYPE_ENUM, GTK_DELETE_PARAGRAPH_ENDS,
 590                                 GTK_TYPE_INT, 1);
 591
 592   gtk_binding_entry_add_signal (binding_set, GDK_u, GDK_CONTROL_MASK,
 593                                 "delete_from_cursor", 2,
 594                                 GTK_TYPE_ENUM, GTK_DELETE_PARAGRAPHS,
 595                                 GTK_TYPE_INT, 1);
 596
 597   gtk_binding_entry_add_signal (binding_set, GDK_space, GDK_MOD1_MASK,
 598                                 "delete_from_cursor", 2,
 599                                 GTK_TYPE_ENUM, GTK_DELETE_WHITESPACE,
 600                                 GTK_TYPE_INT, 1);
 601   gtk_binding_entry_add_signal (binding_set, GDK_space, GDK_MOD1_MASK,
 602                                 "insert_at_cursor", 1,
 603                                 GTK_TYPE_STRING, " ");
 604
 605   gtk_binding_entry_add_signal (binding_set, GDK_backslash, GDK_MOD1_MASK,
 606                                 "delete_from_cursor", 2,
 607                                 GTK_TYPE_ENUM, GTK_DELETE_WHITESPACE,
 608                                 GTK_TYPE_INT, 1);
 609
 610   /* Cut/copy/paste */
 611
 612   gtk_binding_entry_add_signal (binding_set, GDK_x, GDK_CONTROL_MASK,
 613                                 "cut_clipboard", 0);
 614
 615   gtk_binding_entry_add_signal (binding_set, GDK_w, GDK_CONTROL_MASK,
 616                                 "cut_clipboard", 0);
 617
 618   gtk_binding_entry_add_signal (binding_set, GDK_c, GDK_CONTROL_MASK,
 619                                 "copy_clipboard", 0);
 620
 621   gtk_binding_entry_add_signal (binding_set, GDK_v, GDK_CONTROL_MASK,
 622                                 "paste_clipboard", 0);
 623
 624   gtk_binding_entry_add_signal (binding_set, GDK_y, GDK_CONTROL_MASK,
 625                                 "paste_clipboard", 0);
 626
 627   /* Overwrite */
 628   gtk_binding_entry_add_signal (binding_set, GDK_Insert, 0,
 629                                 "toggle_overwrite", 0);
 630
 631   /*
 632    * Default handlers and virtual methods
 633    */
 634   object_class->set_arg = gtk_text_view_set_arg;
 635   object_class->get_arg = gtk_text_view_get_arg;
 636
 637   object_class->destroy = gtk_text_view_destroy;
 638   gobject_class->finalize = gtk_text_view_finalize;
 639
 640   widget_class->realize = gtk_text_view_realize;
 641   widget_class->unrealize = gtk_text_view_unrealize;
 642   widget_class->style_set = gtk_text_view_style_set;
 643   widget_class->direction_changed = gtk_text_view_direction_changed;
 644   widget_class->size_request = gtk_text_view_size_request;
 645   widget_class->size_allocate = gtk_text_view_size_allocate;
 646   widget_class->event = gtk_text_view_event;
 647   widget_class->key_press_event = gtk_text_view_key_press_event;
 648   widget_class->key_release_event = gtk_text_view_key_release_event;
 649   widget_class->button_press_event = gtk_text_view_button_press_event;
 650   widget_class->button_release_event = gtk_text_view_button_release_event;
 651   widget_class->focus_in_event = gtk_text_view_focus_in_event;
 652   widget_class->focus_out_event = gtk_text_view_focus_out_event;
 653   widget_class->motion_notify_event = gtk_text_view_motion_event;
 654   widget_class->expose_event = gtk_text_view_expose_event;
 655   widget_class->draw = gtk_text_view_draw;
 656   widget_class->draw_focus = gtk_text_view_draw_focus;
 657
 658   widget_class->drag_begin = gtk_text_view_drag_begin;
 659   widget_class->drag_end = gtk_text_view_drag_end;
 660   widget_class->drag_data_get = gtk_text_view_drag_data_get;
 661   widget_class->drag_data_delete = gtk_text_view_drag_data_delete;
 662
 663   widget_class->drag_leave = gtk_text_view_drag_leave;
 664   widget_class->drag_motion = gtk_text_view_drag_motion;
 665   widget_class->drag_drop = gtk_text_view_drag_drop;
 666   widget_class->drag_data_received = gtk_text_view_drag_data_received;
 667
 668   container_class->add = gtk_text_view_add;
 669   container_class->remove = gtk_text_view_remove;
 670   container_class->forall = gtk_text_view_forall;
 671
 672   klass->move_cursor = gtk_text_view_move_cursor;
 673   klass->set_anchor = gtk_text_view_set_anchor;
 674   klass->insert_at_cursor = gtk_text_view_insert_at_cursor;
 675   klass->delete_from_cursor = gtk_text_view_delete_from_cursor;
 676   klass->cut_clipboard = gtk_text_view_cut_clipboard;
 677   klass->copy_clipboard = gtk_text_view_copy_clipboard;
 678   klass->paste_clipboard = gtk_text_view_paste_clipboard;
 679   klass->toggle_overwrite = gtk_text_view_toggle_overwrite;
 680   klass->set_scroll_adjustments = gtk_text_view_set_scroll_adjustments;
 681 }
 682
 683 void
 684 gtk_text_view_init (GtkTextView *text_view)
 685 {
 686   GtkWidget *widget;
 687
 688   widget = GTK_WIDGET (text_view);
 689
 690   GTK_WIDGET_SET_FLAGS (widget, GTK_CAN_FOCUS);
 691
 692   /* Set up default style */
 693   text_view->wrap_mode = GTK_WRAPMODE_NONE;
 694   text_view->pixels_above_lines = 0;
 695   text_view->pixels_below_lines = 0;
 696   text_view->pixels_inside_wrap = 0;
 697   text_view->justify = GTK_JUSTIFY_LEFT;
 698   text_view->left_margin = 0;
 699   text_view->right_margin = 0;
 700   text_view->indent = 0;
 701   text_view->tabs = NULL;
 702   text_view->editable = TRUE;
 703
 704   gtk_drag_dest_set (widget,
 705                      GTK_DEST_DEFAULT_DROP,
 706                      target_table, G_N_ELEMENTS (target_table),
 707                      GDK_ACTION_COPY | GDK_ACTION_MOVE);
 708
 709   text_view->virtual_cursor_x = -1;
 710   text_view->virtual_cursor_y = -1;
 711
 712   /* This object is completely private. No external entity can gain a reference
 713    * to it; so we create it here and destroy it in finalize ().
 714    */
 715   text_view->im_context = gtk_im_multicontext_new ();
 716
 717   gtk_signal_connect (GTK_OBJECT (text_view->im_context), "commit",
 718                       GTK_SIGNAL_FUNC (gtk_text_view_commit_handler), text_view);
 719
 720   gtk_signal_connect (GTK_OBJECT (text_view->im_context), "preedit_changed",
 721                       GTK_SIGNAL_FUNC (gtk_text_view_preedit_changed_handler), text_view);
 722
 723   text_view->cursor_visible = TRUE;
 724
 725   text_view->text_window = text_window_new (GTK_TEXT_WINDOW_TEXT,
 726                                             widget, 200, 200);
 727
 728   text_view->drag_start_x = -1;
 729   text_view->drag_start_y = -1;
 730 }
 731
 732 /**
 733  * gtk_text_view_new:
 734  *
 735  * Creates a new #GtkTextView. If you don't call gtk_text_view_set_buffer()
 736  * before using the text view, an empty default buffer will be created
 737  * for you. Get the buffer with gtk_text_view_get_buffer(). If you want
 738  * to specify your own buffer, consider gtk_text_view_new_with_buffer().
 739  *
 740  * Return value: a new #GtkTextView
 741  **/
 742 GtkWidget*
 743 gtk_text_view_new (void)
 744 {
 745   return GTK_WIDGET (gtk_type_new (gtk_text_view_get_type ()));
 746 }
 747
 748 /**
 749  * gtk_text_view_new_with_buffer:
 750  * @buffer: a #GtkTextBuffer
 751  *
 752  * Creates a new #GtkTextView widget displaying the buffer
 753  * @buffer. One buffer can be shared among many widgets.
 754  * @buffer may be NULL to create a default buffer, in which case
 755  * this function is equivalent to gtk_text_view_new(). The
 756  * text view adds its own reference count to the buffer; it does not
 757  * take over an existing reference.
 758  *
 759  * Return value: a new #GtkTextView.
 760  **/
 761 GtkWidget*
 762 gtk_text_view_new_with_buffer (GtkTextBuffer *buffer)
 763 {
 764   GtkTextView *text_view;
 765
 766   text_view = (GtkTextView*)gtk_text_view_new ();
 767
 768   gtk_text_view_set_buffer (text_view, buffer);
 769
 770   return GTK_WIDGET (text_view);
 771 }
 772
 773 /**
 774  * gtk_text_view_set_buffer:
 775  * @text_view: a #GtkTextView
 776  * @buffer: a #GtkTextBuffer
 777  *
 778  * Sets @buffer as the buffer being displayed by @text_view. The previous
 779  * buffer displayed by the text view is unreferenced, and a reference is
 780  * added to @buffer. If you owned a reference to @buffer before passing it
 781  * to this function, you must remove that reference yourself; #GtkTextView
 782  * will not "adopt" it.
 783  *
 784  **/
 785 void
 786 gtk_text_view_set_buffer (GtkTextView   *text_view,
 787                           GtkTextBuffer *buffer)
 788 {
 789   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
 790   g_return_if_fail (buffer == NULL || GTK_IS_TEXT_BUFFER (buffer));
 791
 792   if (text_view->buffer == buffer)
 793     return;
 794
 795   if (text_view->buffer != NULL)
 796     {
 797       /* Destroy all anchored children */
 798       GSList *tmp_list;
 799       GSList *copy;
 800
 801       copy = g_slist_copy (text_view->children);
 802       tmp_list = copy;
 803       while (tmp_list != NULL)
 804         {
 805           GtkTextViewChild *vc = tmp_list->data;
 806
 807           if (vc->anchor)
 808             {
 809               gtk_widget_destroy (vc->widget);
 810               /* vc may now be invalid! */
 811             }
 812
 813           tmp_list = g_slist_next (tmp_list);
 814         }
 815
 816       g_slist_free (copy);
 817
 818       gtk_signal_disconnect_by_func (GTK_OBJECT (text_view->buffer),
 819                                      gtk_text_view_mark_set_handler, text_view);
 820       gtk_object_unref (GTK_OBJECT (text_view->buffer));
 821       text_view->dnd_mark = NULL;
 822     }
 823
 824   text_view->buffer = buffer;
 825
 826   if (buffer != NULL)
 827     {
 828       GtkTextIter start;
 829
 830       gtk_object_ref (GTK_OBJECT (buffer));
 831       gtk_object_sink (GTK_OBJECT (buffer));
 832
 833       if (text_view->layout)
 834         gtk_text_layout_set_buffer (text_view->layout, buffer);
 835
 836       gtk_text_buffer_get_iter_at_offset (text_view->buffer, &start, 0);
 837
 838       text_view->dnd_mark = gtk_text_buffer_create_mark (text_view->buffer,
 839                                                          "gtk_drag_target",
 840                                                          &start, FALSE);
 841
 842       text_view->first_para_mark = gtk_text_buffer_create_mark (text_view->buffer,
 843                                                                 NULL,
 844                                                                 &start, TRUE);
 845
 846       text_view->first_para_pixels = 0;
 847
 848       gtk_signal_connect (GTK_OBJECT (text_view->buffer), "mark_set",
 849                           gtk_text_view_mark_set_handler, text_view);
 850     }
 851
 852   if (GTK_WIDGET_VISIBLE (text_view))
 853     gtk_widget_queue_draw (GTK_WIDGET (text_view));
 854 }
 855
 856 static GtkTextBuffer*
 857 get_buffer (GtkTextView *text_view)
 858 {
 859   if (text_view->buffer == NULL)
 860     {
 861       GtkTextBuffer *b;
 862       b = gtk_text_buffer_new (NULL);
 863       gtk_text_view_set_buffer (text_view, b);
 864       g_object_unref (G_OBJECT (b));
 865     }
 866
 867   return text_view->buffer;
 868 }
 869
 870 /**
 871  * gtk_text_view_get_buffer:
 872  * @text_view: a #GtkTextView
 873  *
 874  * Returns the #GtkTextBuffer being displayed by this text view.
 875  * The reference count on the buffer is not incremented; the caller
 876  * of this function won't own a new reference.
 877  *
 878  * Return value: a #GtkTextBuffer
 879  **/
 880 GtkTextBuffer*
 881 gtk_text_view_get_buffer (GtkTextView *text_view)
 882 {
 883   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
 884
 885   return get_buffer (text_view);
 886 }
 887
 888 /**
 889  * gtk_text_view_get_iter_at_location:
 890  * @text_view: a #GtkTextView
 891  * @iter: a #GtkTextIter
 892  * @x: x position, in buffer coordinates
 893  * @y: y position, in buffer coordinates
 894  *
 895  * Retrieves the iterator at buffer coordinates @x and @y. Buffer
 896  * coordinates are coordinates for the entire buffer, not just the
 897  * currently-displayed portion.  If you have coordinates from an
 898  * event, you have to convert those to buffer coordinates with
 899  * gtk_text_view_window_to_buffer_coords().
 900  *
 901  **/
 902 void
 903 gtk_text_view_get_iter_at_location (GtkTextView *text_view,
 904                                     GtkTextIter *iter,
 905                                     gint         x,
 906                                     gint         y)
 907 {
 908   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
 909   g_return_if_fail (iter != NULL);
 910   g_return_if_fail (text_view->layout != NULL);
 911
 912   gtk_text_layout_get_iter_at_pixel (text_view->layout,
 913                                      iter,
 914                                      x,
 915                                      y);
 916 }
 917
 918 /**
 919  * gtk_text_view_get_iter_location:
 920  * @text_view: a #GtkTextView
 921  * @iter: a #GtkTextIter
 922  * @location: bounds of the character at @iter
 923  *
 924  * Gets a rectangle which roughly contains the character at @iter.
 925  * The rectangle position is in buffer coordinates; use
 926  * gtk_text_view_buffer_to_window_coords() to convert these
 927  * coordinates to coordinates for one of the windows in the text view.
 928  *
 929  **/
 930 void
 931 gtk_text_view_get_iter_location (GtkTextView       *text_view,
 932                                  const GtkTextIter *iter,
 933                                  GdkRectangle      *location)
 934 {
 935   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
 936   g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
 937
 938   gtk_text_layout_get_iter_location (text_view->layout, iter, location);
 939 }
 940
 941 /**
 942  * gtk_text_view_get_line_yrange:
 943  * @text_view: a #GtkTextView
 944  * @iter: a #GtkTextIter
 945  * @y: return location for a y coordinate
 946  * @height: return location for a height
 947  *
 948  * Gets the y coordinate of the top of the line containing @iter,
 949  * and the height of the line. The coordinate is a buffer coordinate;
 950  * convert to window coordinates with gtk_text_view_buffer_to_window_coords().
 951  *
 952  **/
 953 void
 954 gtk_text_view_get_line_yrange (GtkTextView       *text_view,
 955                                const GtkTextIter *iter,
 956                                gint              *y,
 957                                gint              *height)
 958 {
 959   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
 960   g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
 961
 962   gtk_text_layout_get_line_yrange (text_view->layout,
 963                                    iter,
 964                                    y,
 965                                    height);
 966 }
 967
 968 /**
 969  * gtk_text_view_get_line_at_y:
 970  * @text_view: a #GtkTextView
 971  * @target_iter: a #GtkTextIter
 972  * @y: a y coordinate
 973  * @line_top: return location for top coordinate of the line
 974  *
 975  * Gets the #GtkTextIter at the start of the line containing
 976  * the coordinate @y. @y is in buffer coordinates, convert from
 977  * window coordinates with gtk_text_view_window_to_buffer_coords().
 978  * If non-%NULL, @line_top will be filled with the coordinate of the top
 979  * edge of the line.
 980  **/
 981 void
 982 gtk_text_view_get_line_at_y (GtkTextView *text_view,
 983                              GtkTextIter *target_iter,
 984                              gint         y,
 985                              gint        *line_top)
 986 {
 987   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
 988
 989   gtk_text_layout_get_line_at_y (text_view->layout,
 990                                  target_iter,
 991                                  y,
 992                                  line_top);
 993 }
 994
 995 static void
 996 set_adjustment_clamped (GtkAdjustment *adj, gfloat val)
 997 {
 998   /* We don't really want to clamp to upper; we want to clamp to
 999      upper - page_size which is the highest value the scrollbar
1000      will let us reach. */
1001   if (val > (adj->upper - adj->page_size))
1002     val = adj->upper - adj->page_size;
1003
1004   if (val < adj->lower)
1005     val = adj->lower;
1006
1007   gtk_adjustment_set_value (adj, val);
1008 }
1009
1010 static gboolean
1011 gtk_text_view_scroll_to_mark_adjusted (GtkTextView *text_view,
1012                                        GtkTextMark *mark,
1013                                        gint margin,
1014                                        gfloat percentage)
1015 {
1016   GtkTextIter iter;
1017   GdkRectangle rect;
1018   GdkRectangle screen;
1019   gint screen_bottom;
1020   gint screen_right;
1021   GtkWidget *widget;
1022   gboolean retval = FALSE;
1023   gint scroll_inc;
1024
1025   gint current_x_scroll, current_y_scroll;
1026
1027   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1028   g_return_val_if_fail (mark != NULL, FALSE);
1029
1030   widget = GTK_WIDGET (text_view);
1031
1032   if (!GTK_WIDGET_MAPPED (widget))
1033     {
1034       g_warning ("FIXME need to implement scroll_to_mark for unmapped GtkTextView?");
1035       return FALSE;
1036     }
1037
1038   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
1039
1040   gtk_text_layout_get_iter_location (text_view->layout,
1041                                      &iter,
1042                                      &rect);
1043
1044   /* Be sure the scroll region is up-to-date */
1045   gtk_text_view_scroll_calc_now (text_view);
1046
1047   current_x_scroll = text_view->xoffset;
1048   current_y_scroll = text_view->yoffset;
1049
1050   screen.x = current_x_scroll;
1051   screen.y = current_y_scroll;
1052   screen.width = SCREEN_WIDTH (widget);
1053   screen.height = SCREEN_HEIGHT (widget);
1054
1055   {
1056     /* Clamp margin so it's not too large. */
1057     gint small_dimension = MIN (screen.width, screen.height);
1058     gint max_rect_dim;
1059
1060     if (margin > (small_dimension/2 - 5)) /* 5 is arbitrary */
1061       margin = (small_dimension/2 - 5);
1062
1063     if (margin < 0)
1064       margin = 0;
1065
1066     /* make sure rectangle fits in the leftover space */
1067
1068     max_rect_dim = MAX (rect.width, rect.height);
1069
1070     if (max_rect_dim > (small_dimension - margin*2))
1071       margin -= max_rect_dim - (small_dimension - margin*2);
1072
1073     if (margin < 0)
1074       margin = 0;
1075   }
1076
1077   g_assert (margin >= 0);
1078
1079   screen.x += margin;
1080   screen.y += margin;
1081
1082   screen.width -= margin*2;
1083   screen.height -= margin*2;
1084
1085   screen_bottom = screen.y + screen.height;
1086   screen_right = screen.x + screen.width;
1087
1088   /* Vertical scroll (only vertical gets adjusted) */
1089
1090   scroll_inc = 0;
1091   if (rect.y < screen.y)
1092     {
1093       gint scroll_dest = rect.y;
1094       scroll_inc = (scroll_dest - screen.y) * percentage;
1095     }
1096   else if ((rect.y + rect.height) > screen_bottom)
1097     {
1098       gint scroll_dest = rect.y + rect.height;
1099       scroll_inc = (scroll_dest - screen_bottom) * percentage;
1100     }
1101
1102   if (scroll_inc != 0)
1103     {
1104       set_adjustment_clamped (get_vadjustment (text_view),
1105                               current_y_scroll + scroll_inc);
1106       retval = TRUE;
1107     }
1108
1109   /* Horizontal scroll */
1110
1111   scroll_inc = 0;
1112   if (rect.x < screen.x)
1113     {
1114       gint scroll_dest = rect.x;
1115       scroll_inc = scroll_dest - screen.x;
1116     }
1117   else if ((rect.x + rect.width) > screen_right)
1118     {
1119       gint scroll_dest = rect.x + rect.width;
1120       scroll_inc = scroll_dest - screen_right;
1121     }
1122
1123   if (scroll_inc != 0)
1124     {
1125       set_adjustment_clamped (get_hadjustment (text_view),
1126                               current_x_scroll + scroll_inc);
1127       retval = TRUE;
1128     }
1129
1130   return retval;
1131 }
1132
1133 /**
1134  * gtk_text_view_scroll_to_mark:
1135  * @text_view: a #GtkTextView
1136  * @mark: a #GtkTextMark
1137  * @mark_within_margin: a margin
1138  *
1139  * Scrolls @text_view so that @mark is on the screen. If
1140  * @mark_within_margin is nonzero, the mark will be moved onscreen by
1141  * that many pixels. For example, if @mark_within_margin is 5, the
1142  * mark will be at least 5 pixels away from the edge of the screen,
1143  * if possible.
1144  *
1145  * Return value: TRUE if scrolling occurred
1146  **/
1147 gboolean
1148 gtk_text_view_scroll_to_mark (GtkTextView *text_view,
1149                               GtkTextMark *mark,
1150                               gint mark_within_margin)
1151 {
1152   g_return_val_if_fail (mark_within_margin >= 0, FALSE);
1153
1154   return gtk_text_view_scroll_to_mark_adjusted (text_view, mark,
1155                                                 mark_within_margin, 1.0);
1156 }
1157
1158 static gboolean
1159 clamp_iter_onscreen (GtkTextView *text_view, GtkTextIter *iter)
1160 {
1161   GdkRectangle visible_rect;
1162   gtk_text_view_get_visible_rect (text_view, &visible_rect);
1163
1164   return gtk_text_layout_clamp_iter_to_vrange (text_view->layout, iter,
1165                                                visible_rect.y,
1166                                                visible_rect.y + visible_rect.height);
1167 }
1168
1169 /**
1170  * gtk_text_view_move_mark_onscreen:
1171  * @text_view: a #GtkTextView
1172  * @mark: a #GtkTextMark
1173  *
1174  * Moves a mark within the buffer so that it's
1175  * located within the currently-visible text area.
1176  *
1177  * Return value: %TRUE if scrolling occurred
1178  **/
1179 gboolean
1180 gtk_text_view_move_mark_onscreen (GtkTextView *text_view,
1181                                   GtkTextMark *mark)
1182 {
1183   GtkTextIter iter;
1184
1185   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1186   g_return_val_if_fail (mark != NULL, FALSE);
1187
1188   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
1189
1190   if (clamp_iter_onscreen (text_view, &iter))
1191     {
1192       gtk_text_buffer_move_mark (get_buffer (text_view), mark, &iter);
1193       return TRUE;
1194     }
1195   else
1196     return FALSE;
1197 }
1198
1199 /**
1200  * gtk_text_view_get_visible_rect:
1201  * @text_view: a #GtkTextView
1202  * @visible_rect: rectangle to fill
1203  *
1204  * Fills @visible_rect with the currently-visible
1205  * region of the buffer, in buffer coordinates. Convert to window coordinates
1206  * with gtk_text_view_buffer_to_window_coords().
1207  **/
1208 void
1209 gtk_text_view_get_visible_rect (GtkTextView  *text_view,
1210                                 GdkRectangle *visible_rect)
1211 {
1212   GtkWidget *widget;
1213
1214   g_return_if_fail (text_view != NULL);
1215   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1216
1217   widget = GTK_WIDGET (text_view);
1218
1219   if (visible_rect)
1220     {
1221       visible_rect->x = text_view->xoffset;
1222       visible_rect->y = text_view->yoffset;
1223       visible_rect->width = SCREEN_WIDTH (widget);
1224       visible_rect->height = SCREEN_HEIGHT (widget);
1225     }
1226 }
1227
1228 /**
1229  * gtk_text_view_set_wrap_mode:
1230  * @text_view: a #GtkTextView
1231  * @wrap_mode: a #GtkWrapMode
1232  *
1233  * Sets the line wrapping for the view.
1234  **/
1235 void
1236 gtk_text_view_set_wrap_mode (GtkTextView *text_view,
1237                              GtkWrapMode  wrap_mode)
1238 {
1239   g_return_if_fail (text_view != NULL);
1240   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1241
1242   if (text_view->wrap_mode != wrap_mode)
1243     {
1244       text_view->wrap_mode = wrap_mode;
1245
1246       if (text_view->layout)
1247         {
1248           text_view->layout->default_style->wrap_mode = wrap_mode;
1249           gtk_text_layout_default_style_changed (text_view->layout);
1250         }
1251     }
1252 }
1253
1254 /**
1255  * gtk_text_view_get_wrap_mode:
1256  * @text_view: a #GtkTextView
1257  *
1258  * Gets the line wrapping for the view.
1259  *
1260  * Return value: the line wrap setting
1261  **/
1262 GtkWrapMode
1263 gtk_text_view_get_wrap_mode (GtkTextView *text_view)
1264 {
1265   g_return_val_if_fail (text_view != NULL, GTK_WRAPMODE_NONE);
1266   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_WRAPMODE_NONE);
1267
1268   return text_view->wrap_mode;
1269 }
1270
1271 /**
1272  * gtk_text_view_set_editable:
1273  * @text_view: a #GtkTextView
1274  * @setting: whether it's editable
1275  *
1276  * Sets the default editability of the #GtkTextView. You can override
1277  * this default setting with tags in the buffer, using the "editable"
1278  * attribute of tags.
1279  **/
1280 void
1281 gtk_text_view_set_editable (GtkTextView *text_view,
1282                             gboolean     setting)
1283 {
1284   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1285
1286   if (text_view->editable != setting)
1287     {
1288       text_view->editable = setting;
1289
1290       if (text_view->layout)
1291         {
1292           text_view->layout->default_style->editable = text_view->editable;
1293           gtk_text_layout_default_style_changed (text_view->layout);
1294         }
1295     }
1296 }
1297
1298 /**
1299  * gtk_text_view_get_editable:
1300  * @text_view: a #GtkTextView
1301  *
1302  * Returns the default editability of the #GtkTextView. Tags in the
1303  * buffer may override this setting for some ranges of text.
1304  *
1305  * Return value: whether text is editable by default
1306  **/
1307 gboolean
1308 gtk_text_view_get_editable (GtkTextView *text_view)
1309 {
1310   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1311
1312   return text_view->editable;
1313 }
1314
1315 void
1316 gtk_text_view_set_pixels_above_lines (GtkTextView *text_view,
1317                                       gint         pixels_above_lines)
1318 {
1319   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1320
1321   if (text_view->pixels_above_lines != pixels_above_lines)
1322     {
1323       text_view->pixels_above_lines = pixels_above_lines;
1324
1325       if (text_view->layout)
1326         {
1327           text_view->layout->default_style->pixels_above_lines = pixels_above_lines;
1328           gtk_text_layout_default_style_changed (text_view->layout);
1329         }
1330     }
1331 }
1332
1333 gint
1334 gtk_text_view_get_pixels_above_lines (GtkTextView *text_view)
1335 {
1336   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1337
1338   return text_view->pixels_above_lines;
1339 }
1340
1341 void
1342 gtk_text_view_set_pixels_below_lines (GtkTextView *text_view,
1343                                       gint         pixels_below_lines)
1344 {
1345   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1346
1347   if (text_view->pixels_below_lines != pixels_below_lines)
1348     {
1349       text_view->pixels_below_lines = pixels_below_lines;
1350
1351       if (text_view->layout)
1352         {
1353           text_view->layout->default_style->pixels_below_lines = pixels_below_lines;
1354           gtk_text_layout_default_style_changed (text_view->layout);
1355         }
1356     }
1357 }
1358
1359 gint
1360 gtk_text_view_get_pixels_below_lines (GtkTextView *text_view)
1361 {
1362   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1363
1364   return text_view->pixels_below_lines;
1365 }
1366
1367 void
1368 gtk_text_view_set_pixels_inside_wrap (GtkTextView *text_view,
1369                                       gint         pixels_inside_wrap)
1370 {
1371   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1372
1373   if (text_view->pixels_inside_wrap != pixels_inside_wrap)
1374     {
1375       text_view->pixels_inside_wrap = pixels_inside_wrap;
1376
1377       if (text_view->layout)
1378         {
1379           text_view->layout->default_style->pixels_inside_wrap = pixels_inside_wrap;
1380           gtk_text_layout_default_style_changed (text_view->layout);
1381         }
1382     }
1383 }
1384
1385 gint
1386 gtk_text_view_get_pixels_inside_wrap (GtkTextView *text_view)
1387 {
1388   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1389
1390   return text_view->pixels_inside_wrap;
1391 }
1392
1393 void
1394 gtk_text_view_set_justification (GtkTextView     *text_view,
1395                                  GtkJustification justify)
1396 {
1397   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1398
1399   if (text_view->justify != justify)
1400     {
1401       text_view->justify = justify;
1402
1403       if (text_view->layout)
1404         {
1405           text_view->layout->default_style->justify = justify;
1406           gtk_text_layout_default_style_changed (text_view->layout);
1407         }
1408     }
1409 }
1410
1411 GtkJustification
1412 gtk_text_view_get_justification (GtkTextView *text_view)
1413 {
1414   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_JUSTIFY_LEFT);
1415
1416   return text_view->justify;
1417 }
1418
1419 void
1420 gtk_text_view_set_left_margin (GtkTextView *text_view,
1421                                gint         left_margin)
1422 {
1423   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1424
1425   if (text_view->left_margin != left_margin)
1426     {
1427       text_view->left_margin = left_margin;
1428
1429       if (text_view->layout)
1430         {
1431           text_view->layout->default_style->left_margin = left_margin;
1432           gtk_text_layout_default_style_changed (text_view->layout);
1433         }
1434     }
1435 }
1436
1437 gint
1438 gtk_text_view_get_left_margin (GtkTextView *text_view)
1439 {
1440   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1441
1442   return text_view->left_margin;
1443 }
1444
1445 void
1446 gtk_text_view_set_right_margin (GtkTextView *text_view,
1447                                 gint         right_margin)
1448 {
1449   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1450
1451   if (text_view->right_margin != right_margin)
1452     {
1453       text_view->right_margin = right_margin;
1454
1455       if (text_view->layout)
1456         {
1457           text_view->layout->default_style->right_margin = right_margin;
1458           gtk_text_layout_default_style_changed (text_view->layout);
1459         }
1460     }
1461 }
1462
1463 gint
1464 gtk_text_view_get_right_margin (GtkTextView *text_view)
1465 {
1466   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1467
1468   return text_view->right_margin;
1469 }
1470
1471 void
1472 gtk_text_view_set_indent (GtkTextView *text_view,
1473                           gint         indent)
1474 {
1475   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1476
1477   if (text_view->indent != indent)
1478     {
1479       text_view->indent = indent;
1480
1481       if (text_view->layout)
1482         {
1483           text_view->layout->default_style->indent = indent;
1484           gtk_text_layout_default_style_changed (text_view->layout);
1485         }
1486     }
1487 }
1488
1489 gint
1490 gtk_text_view_get_indent (GtkTextView *text_view)
1491 {
1492   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
1493
1494   return text_view->indent;
1495 }
1496
1497 void
1498 gtk_text_view_set_tabs (GtkTextView   *text_view,
1499                         PangoTabArray *tabs)
1500 {
1501   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1502
1503   if (text_view->tabs)
1504     pango_tab_array_free (text_view->tabs);
1505
1506   text_view->tabs = tabs ? pango_tab_array_copy (tabs) : NULL;
1507
1508   if (text_view->layout)
1509     {
1510       /* some unkosher futzing in internal struct details... */
1511       if (text_view->layout->default_style->tabs)
1512         pango_tab_array_free (text_view->layout->default_style->tabs);
1513
1514       text_view->layout->default_style->tabs =
1515         text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
1516
1517       gtk_text_layout_default_style_changed (text_view->layout);
1518     }
1519 }
1520
1521 PangoTabArray*
1522 gtk_text_view_get_tabs (GtkTextView *text_view)
1523 {
1524   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
1525
1526   return text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
1527 }
1528
1529 /**
1530  * gtk_text_view_set_cursor_visible:
1531  * @text_view: a #GtkTextView
1532  * @setting: whether to show the insertion cursor
1533  *
1534  * Toggles whether the insertion point is displayed. A buffer with no editable
1535  * text probably shouldn't have a visible cursor, so you may want to turn
1536  * the cursor off.
1537  **/
1538 void
1539 gtk_text_view_set_cursor_visible    (GtkTextView   *text_view,
1540                                      gboolean       setting)
1541 {
1542   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
1543
1544   setting = (setting != FALSE);
1545
1546   if (text_view->cursor_visible != setting)
1547     {
1548       text_view->cursor_visible = setting;
1549
1550       if (GTK_WIDGET_HAS_FOCUS (text_view))
1551         {
1552           if (text_view->layout)
1553             {
1554               gtk_text_layout_set_cursor_visible (text_view->layout, setting);
1555
1556               if (setting)
1557                 gtk_text_view_start_cursor_blink (text_view);
1558               else
1559                 gtk_text_view_stop_cursor_blink (text_view);
1560             }
1561         }
1562     }
1563 }
1564
1565 /**
1566  * gtk_text_view_get_cursor_visible:
1567  * @text_view: a #GtkTextView
1568  *
1569  * Find out whether the cursor is being displayed.
1570  *
1571  * Return value: whether the insertion mark is visible
1572  **/
1573 gboolean
1574 gtk_text_view_get_cursor_visible    (GtkTextView   *text_view)
1575 {
1576   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1577
1578   return text_view->cursor_visible;
1579 }
1580
1581
1582 /**
1583  * gtk_text_view_place_cursor_onscreen:
1584  * @text_view: a #GtkTextView
1585  *
1586  * Moves the cursor to the currently visible region of the
1587  * buffer, it it isn't there already.
1588  *
1589  * Return value: TRUE if the cursor had to be moved.
1590  **/
1591 gboolean
1592 gtk_text_view_place_cursor_onscreen (GtkTextView *text_view)
1593 {
1594   GtkTextIter insert;
1595
1596   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
1597
1598   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
1599                                     gtk_text_buffer_get_mark (get_buffer (text_view),
1600                                                               "insert"));
1601
1602   if (clamp_iter_onscreen (text_view, &insert))
1603     {
1604       gtk_text_buffer_place_cursor (get_buffer (text_view), &insert);
1605       return TRUE;
1606     }
1607   else
1608     return FALSE;
1609 }
1610
1611 static void
1612 gtk_text_view_destroy (GtkObject *object)
1613 {
1614   GtkTextView *text_view;
1615
1616   text_view = GTK_TEXT_VIEW (object);
1617
1618   gtk_text_view_destroy_layout (text_view);
1619   gtk_text_view_set_buffer (text_view, NULL);
1620
1621   (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
1622 }
1623
1624 static void
1625 gtk_text_view_finalize (GObject *object)
1626 {
1627   GtkTextView *text_view;
1628
1629   text_view = GTK_TEXT_VIEW (object);
1630
1631   g_return_if_fail (text_view->buffer == NULL);
1632
1633   if (text_view->hadjustment)
1634     gtk_object_unref (GTK_OBJECT (text_view->hadjustment));
1635   if (text_view->vadjustment)
1636     gtk_object_unref (GTK_OBJECT (text_view->vadjustment));
1637
1638   text_window_free (text_view->text_window);
1639
1640   if (text_view->left_window)
1641     text_window_free (text_view->left_window);
1642
1643   if (text_view->top_window)
1644     text_window_free (text_view->top_window);
1645
1646   if (text_view->right_window)
1647     text_window_free (text_view->right_window);
1648
1649   if (text_view->bottom_window)
1650     text_window_free (text_view->bottom_window);
1651
1652   gtk_object_unref (GTK_OBJECT (text_view->im_context));
1653
1654   (* G_OBJECT_CLASS (parent_class)->finalize) (object);
1655 }
1656
1657 static void
1658 gtk_text_view_set_arg (GtkObject *object, GtkArg *arg, guint arg_id)
1659 {
1660   GtkTextView *text_view;
1661
1662   text_view = GTK_TEXT_VIEW (object);
1663
1664   switch (arg_id)
1665     {
1666     case ARG_HEIGHT_LINES:
1667       g_warning ("FIXME");
1668       break;
1669
1670     case ARG_WIDTH_COLUMNS:
1671       g_warning ("FIXME");
1672       break;
1673
1674     case ARG_PIXELS_ABOVE_LINES:
1675       gtk_text_view_set_pixels_above_lines (text_view, GTK_VALUE_INT (*arg));
1676       break;
1677
1678     case ARG_PIXELS_BELOW_LINES:
1679       gtk_text_view_set_pixels_below_lines (text_view, GTK_VALUE_INT (*arg));
1680       break;
1681
1682     case ARG_PIXELS_INSIDE_WRAP:
1683       gtk_text_view_set_pixels_inside_wrap (text_view, GTK_VALUE_INT (*arg));
1684       break;
1685
1686     case ARG_EDITABLE:
1687       gtk_text_view_set_editable (text_view, GTK_VALUE_BOOL (*arg));
1688       break;
1689
1690     case ARG_WRAP_MODE:
1691       gtk_text_view_set_wrap_mode (text_view, GTK_VALUE_ENUM (*arg));
1692       break;
1693
1694     case ARG_JUSTIFY:
1695       gtk_text_view_set_justification (text_view, GTK_VALUE_ENUM (*arg));
1696       break;
1697
1698     case ARG_LEFT_MARGIN:
1699       gtk_text_view_set_left_margin (text_view, GTK_VALUE_INT (*arg));
1700       break;
1701
1702     case ARG_RIGHT_MARGIN:
1703       gtk_text_view_set_right_margin (text_view, GTK_VALUE_INT (*arg));
1704       break;
1705
1706     case ARG_INDENT:
1707       gtk_text_view_set_indent (text_view, GTK_VALUE_INT (*arg));
1708       break;
1709
1710     case ARG_TABS:
1711       gtk_text_view_set_tabs (text_view, GTK_VALUE_POINTER (*arg));
1712       break;
1713
1714     default:
1715       g_assert_not_reached ();
1716       break;
1717     }
1718 }
1719
1720 static void
1721 gtk_text_view_get_arg (GtkObject *object, GtkArg *arg, guint arg_id)
1722 {
1723   GtkTextView *text_view;
1724
1725   text_view = GTK_TEXT_VIEW (object);
1726
1727   switch (arg_id)
1728     {
1729     case ARG_HEIGHT_LINES:
1730       g_warning ("FIXME");
1731       break;
1732
1733     case ARG_WIDTH_COLUMNS:
1734       g_warning ("FIXME");
1735       break;
1736
1737     case ARG_PIXELS_ABOVE_LINES:
1738       GTK_VALUE_INT (*arg) = text_view->pixels_above_lines;
1739       break;
1740
1741     case ARG_PIXELS_BELOW_LINES:
1742       GTK_VALUE_INT (*arg) = text_view->pixels_below_lines;
1743       break;
1744
1745     case ARG_PIXELS_INSIDE_WRAP:
1746       GTK_VALUE_INT (*arg) = text_view->pixels_inside_wrap;
1747       break;
1748
1749     case ARG_EDITABLE:
1750       GTK_VALUE_BOOL (*arg) = text_view->editable;
1751       break;
1752
1753     case ARG_WRAP_MODE:
1754       GTK_VALUE_ENUM (*arg) = text_view->wrap_mode;
1755       break;
1756
1757     case ARG_JUSTIFY:
1758       GTK_VALUE_ENUM (*arg) = text_view->justify;
1759       break;
1760
1761     case ARG_LEFT_MARGIN:
1762       GTK_VALUE_INT (*arg) = text_view->left_margin;
1763       break;
1764
1765     case ARG_RIGHT_MARGIN:
1766       GTK_VALUE_INT (*arg) = text_view->right_margin;
1767       break;
1768
1769     case ARG_INDENT:
1770       GTK_VALUE_INT (*arg) = text_view->indent;
1771       break;
1772
1773     case ARG_TABS:
1774       GTK_VALUE_POINTER (*arg) = gtk_text_view_get_tabs (text_view);
1775       break;
1776
1777     default:
1778       arg->type = GTK_TYPE_INVALID;
1779       break;
1780     }
1781 }
1782
1783 static void
1784 gtk_text_view_size_request (GtkWidget      *widget,
1785                             GtkRequisition *requisition)
1786 {
1787   GtkTextView *text_view;
1788   GSList *tmp_list;
1789
1790   text_view = GTK_TEXT_VIEW (widget);
1791
1792   requisition->width = text_view->text_window->requisition.width + FOCUS_EDGE_WIDTH * 2;
1793   requisition->height = text_view->text_window->requisition.height + FOCUS_EDGE_WIDTH * 2;
1794
1795   if (text_view->left_window)
1796     requisition->width += text_view->left_window->requisition.width;
1797
1798   if (text_view->right_window)
1799     requisition->width += text_view->right_window->requisition.width;
1800
1801   if (text_view->top_window)
1802     requisition->height += text_view->top_window->requisition.height;
1803
1804   if (text_view->bottom_window)
1805     requisition->height += text_view->bottom_window->requisition.height;
1806
1807   tmp_list = text_view->children;
1808   while (tmp_list != NULL)
1809     {
1810       GtkTextViewChild *child = tmp_list->data;
1811
1812       if (child->anchor)
1813         {
1814           GtkRequisition child_req;
1815           GtkRequisition old_req;
1816
1817           old_req = child->widget->requisition;
1818
1819           gtk_widget_size_request (child->widget, &child_req);
1820
1821           if (text_view->layout &&
1822               (old_req.width != child_req.width ||
1823                old_req.height != child_req.height))
1824             gtk_text_child_anchor_queue_resize (child->anchor,
1825                                                 text_view->layout);
1826         }
1827       else
1828         {
1829
1830         }
1831
1832       tmp_list = g_slist_next (tmp_list);
1833     }
1834 }
1835
1836 static void
1837 gtk_text_view_allocate_children (GtkTextView *text_view)
1838 {
1839   GSList *tmp_list;
1840
1841   return;
1842
1843   tmp_list = text_view->children;
1844   while (tmp_list != NULL)
1845     {
1846       GtkTextViewChild *child = tmp_list->data;
1847
1848       if (child->anchor)
1849         {
1850           /* We need to force-validate the regions containing
1851            * children.
1852            */
1853           GtkTextIter child_loc;
1854           gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
1855                                                     &child_loc,
1856                                                     child->anchor);
1857
1858           gtk_text_layout_validate_yrange (text_view->layout,
1859                                            &child_loc,
1860                                            0, 1);
1861         }
1862       else
1863         {
1864
1865         }
1866
1867       tmp_list = g_slist_next (tmp_list);
1868     }
1869 }
1870
1871 static void
1872 gtk_text_view_size_allocate (GtkWidget *widget,
1873                              GtkAllocation *allocation)
1874 {
1875   GtkTextView *text_view;
1876   GtkTextIter first_para;
1877   gint y;
1878   GtkAdjustment *vadj;
1879   gboolean yoffset_changed = FALSE;
1880   gint width, height;
1881   GdkRectangle text_rect;
1882   GdkRectangle left_rect;
1883   GdkRectangle right_rect;
1884   GdkRectangle top_rect;
1885   GdkRectangle bottom_rect;
1886
1887   text_view = GTK_TEXT_VIEW (widget);
1888
1889   widget->allocation = *allocation;
1890
1891   if (GTK_WIDGET_REALIZED (widget))
1892     {
1893       gdk_window_move_resize (widget->window,
1894                               allocation->x, allocation->y,
1895                               allocation->width, allocation->height);
1896     }
1897
1898   /* distribute width/height among child windows. Ensure all
1899    * windows get at least a 1x1 allocation.
1900    */
1901
1902   width = allocation->width - FOCUS_EDGE_WIDTH * 2;
1903
1904   if (text_view->left_window)
1905     left_rect.width = text_view->left_window->requisition.width;
1906   else
1907     left_rect.width = 1;
1908
1909   width -= left_rect.width;
1910
1911   if (text_view->right_window)
1912     right_rect.width = text_view->right_window->requisition.width;
1913   else
1914     right_rect.width = 1;
1915
1916   width -= right_rect.width;
1917
1918   text_rect.width = MAX (1, width);
1919
1920   top_rect.width = text_rect.width;
1921   bottom_rect.width = text_rect.width;
1922
1923
1924   height = allocation->height - FOCUS_EDGE_WIDTH * 2;
1925
1926   if (text_view->top_window)
1927     top_rect.height = text_view->top_window->requisition.height;
1928   else
1929     top_rect.height = 1;
1930
1931   height -= top_rect.height;
1932
1933   if (text_view->bottom_window)
1934     bottom_rect.height = text_view->bottom_window->requisition.height;
1935   else
1936     bottom_rect.height = 1;
1937
1938   height -= bottom_rect.height;
1939
1940   text_rect.height = MAX (1, height);
1941
1942   left_rect.height = text_rect.height;
1943   right_rect.height = text_rect.height;
1944
1945   /* Origins */
1946   left_rect.x = FOCUS_EDGE_WIDTH;
1947   top_rect.y = FOCUS_EDGE_WIDTH;
1948
1949   text_rect.x = left_rect.x + left_rect.width;
1950   text_rect.y = top_rect.y + top_rect.height;
1951
1952   left_rect.y = text_rect.y;
1953   right_rect.y = text_rect.y;
1954
1955   top_rect.x = text_rect.x;
1956   bottom_rect.x = text_rect.x;
1957
1958   right_rect.x = text_rect.x + text_rect.width;
1959   bottom_rect.y = text_rect.y + text_rect.height;
1960
1961   text_window_size_allocate (text_view->text_window,
1962                              &text_rect);
1963
1964   if (text_view->left_window)
1965     text_window_size_allocate (text_view->left_window,
1966                                &left_rect);
1967
1968   if (text_view->right_window)
1969     text_window_size_allocate (text_view->right_window,
1970                                &right_rect);
1971
1972   if (text_view->top_window)
1973     text_window_size_allocate (text_view->top_window,
1974                                &top_rect);
1975
1976   if (text_view->bottom_window)
1977     text_window_size_allocate (text_view->bottom_window,
1978                                &bottom_rect);
1979
1980   gtk_text_view_ensure_layout (text_view);
1981   gtk_text_layout_set_screen_width (text_view->layout,
1982                                     SCREEN_WIDTH (text_view));
1983
1984   gtk_text_view_allocate_children (text_view);
1985
1986   gtk_text_view_validate_onscreen (text_view);
1987   gtk_text_view_scroll_calc_now (text_view);
1988
1989   /* Now adjust the value of the adjustment to keep the cursor at the
1990    * same place in the buffer
1991    */
1992   gtk_text_view_get_first_para_iter (text_view, &first_para);
1993   gtk_text_layout_get_line_yrange (text_view->layout, &first_para, &y, NULL);
1994
1995   y += text_view->first_para_pixels;
1996
1997   /* Ensure h/v adj exist */
1998   get_hadjustment (text_view);
1999   get_vadjustment (text_view);
2000
2001   vadj = text_view->vadjustment;
2002   if (y > vadj->upper - vadj->page_size)
2003     y = MAX (0, vadj->upper - vadj->page_size);
2004
2005   if (y != text_view->yoffset)
2006     {
2007       vadj->value = text_view->yoffset = y;
2008       yoffset_changed = TRUE;
2009     }
2010
2011   text_view->hadjustment->page_size = SCREEN_WIDTH (text_view);
2012   text_view->hadjustment->page_increment = SCREEN_WIDTH (text_view) / 2;
2013   text_view->hadjustment->lower = 0;
2014   text_view->hadjustment->upper = MAX (SCREEN_WIDTH (text_view),
2015                                        text_view->width);
2016   gtk_signal_emit_by_name (GTK_OBJECT (text_view->hadjustment), "changed");
2017
2018   text_view->vadjustment->page_size = SCREEN_HEIGHT (text_view);
2019   text_view->vadjustment->page_increment = SCREEN_HEIGHT (text_view) / 2;
2020   text_view->vadjustment->lower = 0;
2021   text_view->vadjustment->upper = MAX (SCREEN_HEIGHT (text_view),
2022                                        text_view->height);
2023   gtk_signal_emit_by_name (GTK_OBJECT (text_view->vadjustment), "changed");
2024
2025   if (yoffset_changed)
2026     gtk_adjustment_value_changed (vadj);
2027 }
2028
2029 static void
2030 gtk_text_view_get_first_para_iter (GtkTextView *text_view,
2031                                    GtkTextIter *iter)
2032 {
2033   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), iter,
2034                                     text_view->first_para_mark);
2035 }
2036
2037 static void
2038 gtk_text_view_validate_onscreen (GtkTextView *text_view)
2039 {
2040   GtkWidget *widget = GTK_WIDGET (text_view);
2041
2042   if (SCREEN_HEIGHT (widget) > 0)
2043     {
2044       GtkTextIter first_para;
2045       gtk_text_view_get_first_para_iter (text_view, &first_para);
2046
2047       gtk_text_layout_validate_yrange (text_view->layout,
2048                                        &first_para,
2049                                        0,
2050                                        text_view->first_para_pixels +
2051                                        SCREEN_HEIGHT (widget));
2052     }
2053 }
2054
2055 static gboolean
2056 first_validate_callback (gpointer data)
2057 {
2058   GtkTextView *text_view = data;
2059
2060   gtk_text_view_validate_onscreen (text_view);
2061
2062   text_view->first_validate_idle = 0;
2063   return FALSE;
2064 }
2065
2066 static gboolean
2067 incremental_validate_callback (gpointer data)
2068 {
2069   GtkTextView *text_view = data;
2070
2071   gtk_text_layout_validate (text_view->layout, 2000);
2072   if (gtk_text_layout_is_valid (text_view->layout))
2073     {
2074       text_view->incremental_validate_idle = 0;
2075       return FALSE;
2076     }
2077   else
2078     return TRUE;
2079 }
2080
2081 static void
2082 invalidated_handler (GtkTextLayout *layout,
2083                      gpointer       data)
2084 {
2085   GtkTextView *text_view;
2086
2087   text_view = GTK_TEXT_VIEW (data);
2088
2089   if (!text_view->first_validate_idle)
2090     text_view->first_validate_idle = g_idle_add_full (GTK_PRIORITY_RESIZE - 1, first_validate_callback, text_view, NULL);
2091
2092   if (!text_view->incremental_validate_idle)
2093     text_view->incremental_validate_idle = g_idle_add_full (GDK_PRIORITY_REDRAW + 1, incremental_validate_callback, text_view, NULL);
2094 }
2095
2096 static void
2097 changed_handler (GtkTextLayout *layout,
2098                  gint           start_y,
2099                  gint           old_height,
2100                  gint           new_height,
2101                  gpointer       data)
2102 {
2103   GtkTextView *text_view;
2104   GtkWidget *widget;
2105   GdkRectangle visible_rect;
2106   GdkRectangle redraw_rect;
2107
2108   text_view = GTK_TEXT_VIEW (data);
2109   widget = GTK_WIDGET (data);
2110
2111   if (GTK_WIDGET_REALIZED (text_view))
2112     {
2113       gtk_text_view_get_visible_rect (text_view, &visible_rect);
2114
2115       redraw_rect.x = visible_rect.x;
2116       redraw_rect.width = visible_rect.width;
2117       redraw_rect.y = start_y;
2118
2119       if (old_height == new_height)
2120         redraw_rect.height = old_height;
2121       else
2122         redraw_rect.height = MAX (0, visible_rect.y + visible_rect.height - start_y);
2123
2124       if (gdk_rectangle_intersect (&redraw_rect, &visible_rect, &redraw_rect))
2125         {
2126           /* text_window_invalidate_rect() takes buffer coordinates */
2127           text_window_invalidate_rect (text_view->text_window,
2128                                        &redraw_rect);
2129
2130           if (text_view->left_window)
2131             text_window_invalidate_rect (text_view->left_window,
2132                                          &redraw_rect);
2133           if (text_view->right_window)
2134             text_window_invalidate_rect (text_view->right_window,
2135                                          &redraw_rect);
2136           if (text_view->top_window)
2137             text_window_invalidate_rect (text_view->top_window,
2138                                          &redraw_rect);
2139           if (text_view->bottom_window)
2140             text_window_invalidate_rect (text_view->bottom_window,
2141                                          &redraw_rect);
2142         }
2143     }
2144
2145   if (old_height != new_height)
2146     {
2147       gboolean yoffset_changed = FALSE;
2148
2149       if (start_y + old_height <= text_view->yoffset - text_view->first_para_pixels)
2150         {
2151           text_view->yoffset += new_height - old_height;
2152           get_vadjustment (text_view)->value = text_view->yoffset;
2153           yoffset_changed = TRUE;
2154         }
2155
2156       if (yoffset_changed)
2157         gtk_adjustment_value_changed (get_vadjustment (text_view));
2158     }
2159
2160   gtk_text_view_scroll_calc_now (text_view);
2161 }
2162
2163 static void
2164 gtk_text_view_realize (GtkWidget *widget)
2165 {
2166   GtkTextView *text_view;
2167   GdkWindowAttr attributes;
2168   gint attributes_mask;
2169
2170   text_view = GTK_TEXT_VIEW (widget);
2171   GTK_WIDGET_SET_FLAGS (text_view, GTK_REALIZED);
2172
2173   attributes.window_type = GDK_WINDOW_CHILD;
2174   attributes.x = widget->allocation.x;
2175   attributes.y = widget->allocation.y;
2176   attributes.width = widget->allocation.width;
2177   attributes.height = widget->allocation.height;
2178   attributes.wclass = GDK_INPUT_OUTPUT;
2179   attributes.visual = gtk_widget_get_visual (widget);
2180   attributes.colormap = gtk_widget_get_colormap (widget);
2181   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK | GDK_EXPOSURE_MASK;
2182
2183   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
2184
2185   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
2186                                    &attributes, attributes_mask);
2187   gdk_window_set_user_data (widget->window, widget);
2188
2189   /* must come before text_window_realize calls */
2190   widget->style = gtk_style_attach (widget->style, widget->window);
2191
2192   gdk_window_set_background (widget->window,
2193                              &widget->style->bg[GTK_WIDGET_STATE (widget)]);
2194
2195   text_window_realize (text_view->text_window, widget->window);
2196
2197   if (text_view->left_window)
2198     text_window_realize (text_view->left_window,
2199                          widget->window);
2200
2201   if (text_view->top_window)
2202     text_window_realize (text_view->top_window,
2203                          widget->window);
2204
2205   if (text_view->right_window)
2206     text_window_realize (text_view->right_window,
2207                          widget->window);
2208
2209   if (text_view->bottom_window)
2210     text_window_realize (text_view->bottom_window,
2211                          widget->window);
2212
2213   gtk_text_view_ensure_layout (text_view);
2214 }
2215
2216 static void
2217 gtk_text_view_unrealize (GtkWidget *widget)
2218 {
2219   GtkTextView *text_view;
2220
2221   text_view = GTK_TEXT_VIEW (widget);
2222
2223   if (text_view->first_validate_idle)
2224     {
2225       g_source_remove (text_view->first_validate_idle);
2226       text_view->first_validate_idle = 0;
2227     }
2228
2229   if (text_view->incremental_validate_idle)
2230     {
2231       g_source_remove (text_view->incremental_validate_idle);
2232       text_view->incremental_validate_idle = 0;
2233     }
2234
2235   if (text_view->popup_menu)
2236     {
2237       gtk_widget_destroy (text_view->popup_menu);
2238       text_view->popup_menu = NULL;
2239     }
2240
2241   text_window_unrealize (text_view->text_window);
2242
2243   if (text_view->left_window)
2244     text_window_unrealize (text_view->left_window);
2245
2246   if (text_view->top_window)
2247     text_window_unrealize (text_view->top_window);
2248
2249   if (text_view->right_window)
2250     text_window_unrealize (text_view->right_window);
2251
2252   if (text_view->bottom_window)
2253     text_window_unrealize (text_view->bottom_window);
2254
2255   gtk_text_view_destroy_layout (text_view);
2256
2257   (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
2258 }
2259
2260 static void
2261 gtk_text_view_style_set (GtkWidget *widget,
2262                          GtkStyle  *previous_style)
2263 {
2264   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
2265
2266   if (GTK_WIDGET_REALIZED (widget))
2267     {
2268       gdk_window_set_background (widget->window,
2269                                  &widget->style->bg[GTK_WIDGET_STATE (widget)]);
2270
2271       gdk_window_set_background (text_view->text_window->bin_window,
2272                                  &widget->style->base[GTK_WIDGET_STATE (widget)]);
2273
2274       if (text_view->left_window)
2275         gdk_window_set_background (text_view->left_window->bin_window,
2276                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
2277       if (text_view->right_window)
2278         gdk_window_set_background (text_view->right_window->bin_window,
2279                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
2280
2281       if (text_view->top_window)
2282         gdk_window_set_background (text_view->top_window->bin_window,
2283                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
2284
2285       if (text_view->bottom_window)
2286         gdk_window_set_background (text_view->bottom_window->bin_window,
2287                                    &widget->style->bg[GTK_WIDGET_STATE (widget)]);
2288
2289       gtk_text_view_set_attributes_from_style (text_view,
2290                                                text_view->layout->default_style,
2291                                                widget->style);
2292       gtk_text_layout_default_style_changed (text_view->layout);
2293     }
2294 }
2295
2296 static void
2297 gtk_text_view_direction_changed (GtkWidget        *widget,
2298                                  GtkTextDirection  previous_direction)
2299 {
2300   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
2301
2302   if (text_view->layout)
2303     {
2304       text_view->layout->default_style->direction = gtk_widget_get_direction (widget);
2305       gtk_text_layout_default_style_changed (text_view->layout);
2306     }
2307 }
2308
2309 /*
2310  * Events
2311  */
2312
2313 static gboolean
2314 get_event_coordinates (GdkEvent *event, gint *x, gint *y)
2315 {
2316   if (event)
2317     switch (event->type)
2318       {
2319       case GDK_MOTION_NOTIFY:
2320         *x = event->motion.x;
2321         *y = event->motion.y;
2322         return TRUE;
2323         break;
2324
2325       case GDK_BUTTON_PRESS:
2326       case GDK_2BUTTON_PRESS:
2327       case GDK_3BUTTON_PRESS:
2328       case GDK_BUTTON_RELEASE:
2329         *x = event->button.x;
2330         *y = event->button.y;
2331         return TRUE;
2332         break;
2333
2334       case GDK_KEY_PRESS:
2335       case GDK_KEY_RELEASE:
2336       case GDK_ENTER_NOTIFY:
2337       case GDK_LEAVE_NOTIFY:
2338       case GDK_PROPERTY_NOTIFY:
2339       case GDK_SELECTION_CLEAR:
2340       case GDK_SELECTION_REQUEST:
2341       case GDK_SELECTION_NOTIFY:
2342       case GDK_PROXIMITY_IN:
2343       case GDK_PROXIMITY_OUT:
2344       case GDK_DRAG_ENTER:
2345       case GDK_DRAG_LEAVE:
2346       case GDK_DRAG_MOTION:
2347       case GDK_DRAG_STATUS:
2348       case GDK_DROP_START:
2349       case GDK_DROP_FINISHED:
2350       default:
2351         return FALSE;
2352         break;
2353       }
2354
2355   return FALSE;
2356 }
2357
2358 static gint
2359 emit_event_on_tags (GtkWidget   *widget,
2360                     GdkEvent    *event,
2361                     GtkTextIter *iter)
2362 {
2363   GSList *tags;
2364   GSList *tmp;
2365   gint retval = FALSE;
2366   GtkTextView *text_view;
2367
2368   text_view = GTK_TEXT_VIEW (widget);
2369
2370   tags = gtk_text_iter_get_tags (iter);
2371
2372   tmp = tags;
2373   while (tmp != NULL)
2374     {
2375       GtkTextTag *tag = tmp->data;
2376
2377       if (gtk_text_tag_event (tag, G_OBJECT (widget), event, iter))
2378         {
2379           retval = TRUE;
2380           break;
2381         }
2382
2383       tmp = g_slist_next (tmp);
2384     }
2385
2386   g_slist_free (tags);
2387
2388   return retval;
2389 }
2390
2391 static gint
2392 gtk_text_view_event (GtkWidget *widget, GdkEvent *event)
2393 {
2394   GtkTextView *text_view;
2395   gint x = 0, y = 0;
2396
2397   text_view = GTK_TEXT_VIEW (widget);
2398
2399   if (text_view->layout == NULL ||
2400       get_buffer (text_view) == NULL)
2401     return FALSE;
2402
2403   if (event->any.window != text_view->text_window->bin_window)
2404     return FALSE;
2405
2406   if (get_event_coordinates (event, &x, &y))
2407     {
2408       GtkTextIter iter;
2409
2410       x += text_view->xoffset;
2411       y += text_view->yoffset;
2412
2413       /* FIXME this is slow and we do it twice per event.
2414          My favorite solution is to have GtkTextLayout cache
2415          the last couple lookups. */
2416       gtk_text_layout_get_iter_at_pixel (text_view->layout,
2417                                          &iter,
2418                                          x, y);
2419
2420       return emit_event_on_tags (widget, event, &iter);
2421     }
2422   else if (event->type == GDK_KEY_PRESS ||
2423            event->type == GDK_KEY_RELEASE)
2424     {
2425       GtkTextMark *insert;
2426       GtkTextIter iter;
2427
2428       insert = gtk_text_buffer_get_mark (get_buffer (text_view),
2429                                          "insert");
2430
2431       gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
2432
2433       return emit_event_on_tags (widget, event, &iter);
2434     }
2435   else
2436     return FALSE;
2437 }
2438
2439 static gint
2440 gtk_text_view_key_press_event (GtkWidget *widget, GdkEventKey *event)
2441 {
2442   GtkTextView *text_view;
2443
2444   text_view = GTK_TEXT_VIEW (widget);
2445
2446   if (text_view->layout == NULL ||
2447       get_buffer (text_view) == NULL)
2448     return FALSE;
2449
2450   if (gtk_im_context_filter_keypress (text_view->im_context, event))
2451     {
2452       text_view->need_im_reset = TRUE;
2453       return TRUE;
2454     }
2455   else if (GTK_WIDGET_CLASS (parent_class)->key_press_event &&
2456            GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, event))
2457     return TRUE;
2458   else if (event->keyval == GDK_Return)
2459     {
2460       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\n", 1,
2461                                                     text_view->editable);
2462       gtk_text_view_scroll_to_mark (text_view,
2463                                     gtk_text_buffer_get_mark (get_buffer (text_view),
2464                                                               "insert"),
2465                                     0);
2466       return TRUE;
2467     }
2468   /* Pass through Tab as literal tab, unless Control is held down */
2469   else if (event->keyval == GDK_Tab && !(event->state & GDK_CONTROL_MASK))
2470     {
2471       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\t", 1,
2472                                                     text_view->editable);
2473       gtk_text_view_scroll_to_mark (text_view,
2474                                     gtk_text_buffer_get_mark (get_buffer (text_view),
2475                                                               "insert"),
2476                                     0);
2477       return TRUE;
2478     }
2479   else
2480     return FALSE;
2481 }
2482
2483 static gint
2484 gtk_text_view_key_release_event (GtkWidget *widget, GdkEventKey *event)
2485 {
2486   return FALSE;
2487 }
2488
2489 static gint
2490 gtk_text_view_button_press_event (GtkWidget *widget, GdkEventButton *event)
2491 {
2492   GtkTextView *text_view;
2493
2494   text_view = GTK_TEXT_VIEW (widget);
2495
2496   gtk_widget_grab_focus (widget);
2497
2498   if (event->window != text_view->text_window->bin_window)
2499     {
2500       /* Remove selection if any. */
2501       gtk_text_view_unselect (text_view);
2502       return FALSE;
2503     }
2504
2505 #if 0
2506   /* debug hack */
2507   if (event->button == 3 && (event->state & GDK_CONTROL_MASK) != 0)
2508     _gtk_text_buffer_spew (GTK_TEXT_VIEW (widget)->buffer);
2509   else if (event->button == 3)
2510     gtk_text_layout_spew (GTK_TEXT_VIEW (widget)->layout);
2511 #endif
2512
2513   if (event->type == GDK_BUTTON_PRESS)
2514     {
2515       gtk_text_view_reset_im_context (text_view);
2516
2517       if (event->button == 1)
2518         {
2519           /* If we're in the selection, start a drag copy/move of the
2520            * selection; otherwise, start creating a new selection.
2521            */
2522           GtkTextIter iter;
2523           GtkTextIter start, end;
2524
2525           gtk_text_layout_get_iter_at_pixel (text_view->layout,
2526                                              &iter,
2527                                              event->x + text_view->xoffset,
2528                                              event->y + text_view->yoffset);
2529
2530           if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
2531                                                     &start, &end) &&
2532               gtk_text_iter_in_range (&iter, &start, &end))
2533             {
2534               text_view->drag_start_x = event->x;
2535               text_view->drag_start_y = event->y;
2536             }
2537           else
2538             {
2539               gtk_text_view_start_selection_drag (text_view, &iter, event);
2540             }
2541
2542           return TRUE;
2543         }
2544       else if (event->button == 2)
2545         {
2546           GtkTextIter iter;
2547
2548           gtk_text_layout_get_iter_at_pixel (text_view->layout,
2549                                              &iter,
2550                                              event->x + text_view->xoffset,
2551                                              event->y + text_view->yoffset);
2552
2553           gtk_text_buffer_paste_primary (get_buffer (text_view),
2554                                          &iter,
2555                                          text_view->editable);
2556           return TRUE;
2557         }
2558       else if (event->button == 3)
2559         {
2560           gtk_text_view_popup_menu (text_view, event);
2561         }
2562     }
2563
2564   return FALSE;
2565 }
2566
2567 static gint
2568 gtk_text_view_button_release_event (GtkWidget *widget, GdkEventButton *event)
2569 {
2570   GtkTextView *text_view;
2571
2572   text_view = GTK_TEXT_VIEW (widget);
2573
2574   if (event->window != text_view->text_window->bin_window)
2575     return FALSE;
2576
2577   if (event->button == 1)
2578     {
2579       if (text_view->drag_start_x >= 0)
2580         {
2581           text_view->drag_start_x = -1;
2582           text_view->drag_start_y = -1;
2583         }
2584
2585       if (gtk_text_view_end_selection_drag (GTK_TEXT_VIEW (widget), event))
2586         return TRUE;
2587       else
2588         {
2589           /* Unselect everything; probably we were dragging, or clicked
2590            * outside the text.
2591            */
2592           gtk_text_view_unselect (text_view);
2593           return FALSE;
2594         }
2595     }
2596
2597   return FALSE;
2598 }
2599
2600 static gint
2601 gtk_text_view_focus_in_event (GtkWidget *widget, GdkEventFocus *event)
2602 {
2603   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
2604
2605   GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
2606   gtk_widget_draw_focus (widget);
2607
2608   if (text_view->cursor_visible && text_view->layout)
2609     {
2610       gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
2611       gtk_text_view_start_cursor_blink (text_view);
2612     }
2613
2614   text_view->need_im_reset = TRUE;
2615   gtk_im_context_focus_in (GTK_TEXT_VIEW (widget)->im_context);
2616
2617   return FALSE;
2618 }
2619
2620 static gint
2621 gtk_text_view_focus_out_event (GtkWidget *widget, GdkEventFocus *event)
2622 {
2623   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
2624
2625   GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
2626   gtk_widget_draw_focus (widget);
2627
2628   if (text_view->cursor_visible && text_view->layout)
2629     {
2630       gtk_text_layout_set_cursor_visible (text_view->layout, FALSE);
2631       gtk_text_view_stop_cursor_blink (text_view);
2632     }
2633
2634   text_view->need_im_reset = TRUE;
2635   gtk_im_context_focus_out (GTK_TEXT_VIEW (widget)->im_context);
2636
2637   return FALSE;
2638 }
2639
2640 static gint
2641 gtk_text_view_motion_event (GtkWidget *widget, GdkEventMotion *event)
2642 {
2643   GtkTextView *text_view = GTK_TEXT_VIEW (widget);
2644
2645   if (event->window == text_view->text_window->bin_window &&
2646       text_view->drag_start_x >= 0)
2647     {
2648       gint x, y;
2649       gint dx, dy;
2650
2651       gdk_window_get_pointer (text_view->text_window->bin_window,
2652                               &x, &y, NULL);
2653
2654       dx = text_view->drag_start_x - x;
2655       dy = text_view->drag_start_y - y;
2656
2657       if (ABS (dx) > DRAG_THRESHOLD ||
2658           ABS (dy) > DRAG_THRESHOLD)
2659         {
2660           GtkTextIter iter;
2661           gint buffer_x, buffer_y;
2662
2663           gtk_text_view_window_to_buffer_coords (text_view,
2664                                                  GTK_TEXT_WINDOW_TEXT,
2665                                                  text_view->drag_start_x,
2666                                                  text_view->drag_start_y,
2667                                                  &buffer_x,
2668                                                  &buffer_y);
2669
2670           gtk_text_layout_get_iter_at_pixel (text_view->layout,
2671                                              &iter,
2672                                              buffer_x, buffer_y);
2673
2674           gtk_text_view_start_selection_dnd (text_view, &iter, event);
2675           return TRUE;
2676         }
2677     }
2678
2679   return FALSE;
2680 }
2681
2682 static void
2683 gtk_text_view_paint (GtkWidget *widget, GdkRectangle *area)
2684 {
2685   GtkTextView *text_view;
2686
2687   text_view = GTK_TEXT_VIEW (widget);
2688
2689   g_return_if_fail (text_view->layout != NULL);
2690   g_return_if_fail (text_view->xoffset >= 0);
2691   g_return_if_fail (text_view->yoffset >= 0);
2692
2693   gtk_text_view_validate_onscreen (text_view);
2694
2695 #if 0
2696   printf ("painting %d,%d  %d x %d\n",
2697           area->x, area->y,
2698           area->width, area->height);
2699 #endif
2700
2701   gtk_text_layout_draw (text_view->layout,
2702                         widget,
2703                         text_view->text_window->bin_window,
2704                         text_view->xoffset,
2705                         text_view->yoffset,
2706                         area->x, area->y,
2707                         area->width, area->height);
2708 }
2709
2710 static void
2711 send_expose (GtkTextView   *text_view,
2712              GtkTextWindow *win,
2713              GdkRectangle  *area)
2714 {
2715   GdkEventExpose event;
2716
2717   event.type = GDK_EXPOSE;
2718   event.send_event = TRUE;
2719   event.window = win->bin_window;
2720   event.area = *area;
2721   event.count = 0;
2722
2723   /* Fix coordinates (convert widget coords to window coords) */
2724   gtk_text_view_window_to_buffer_coords (text_view,
2725                                          GTK_TEXT_WINDOW_WIDGET,
2726                                          event.area.x,
2727                                          event.area.y,
2728                                          &event.area.x,
2729                                          &event.area.y);
2730
2731   gtk_text_view_buffer_to_window_coords (text_view,
2732                                          win->type,
2733                                          event.area.x,
2734                                          event.area.y,
2735                                          &event.area.x,
2736                                          &event.area.y);
2737
2738
2739   gdk_window_ref (event.window);
2740   gtk_widget_event (GTK_WIDGET (text_view), (GdkEvent*) &event);
2741   gdk_window_unref (event.window);
2742 }
2743
2744 static void
2745 gtk_text_view_draw (GtkWidget *widget, GdkRectangle *area)
2746 {
2747   GdkRectangle intersection;
2748   GtkTextView *text_view;
2749
2750   text_view = GTK_TEXT_VIEW (widget);
2751
2752   gtk_text_view_paint (widget, area);
2753
2754   /* If the area overlaps the "edge" of the widget, draw the focus
2755    * rectangle
2756    */
2757   if (area->x < FOCUS_EDGE_WIDTH ||
2758       area->y < FOCUS_EDGE_WIDTH ||
2759       (area->x + area->width) > (widget->allocation.width - FOCUS_EDGE_WIDTH) ||
2760       (area->y + area->height) > (widget->allocation.height - FOCUS_EDGE_WIDTH))
2761     gtk_widget_draw_focus (widget);
2762
2763   /* Synthesize expose events for the user-drawn border windows,
2764    * just as we would for a drawing area.
2765    */
2766
2767   if (text_view->left_window &&
2768       gdk_rectangle_intersect (area, &text_view->left_window->allocation,
2769                                &intersection))
2770     send_expose (text_view, text_view->left_window, &intersection);
2771
2772   if (text_view->right_window &&
2773       gdk_rectangle_intersect (area, &text_view->right_window->allocation,
2774                                &intersection))
2775     send_expose (text_view, text_view->right_window, &intersection);
2776
2777   if (text_view->top_window &&
2778       gdk_rectangle_intersect (area, &text_view->top_window->allocation,
2779                                &intersection))
2780     send_expose (text_view, text_view->top_window, &intersection);
2781
2782   if (text_view->bottom_window &&
2783       gdk_rectangle_intersect (area, &text_view->bottom_window->allocation,
2784                                &intersection))
2785     send_expose (text_view, text_view->bottom_window, &intersection);
2786 }
2787
2788 static gint
2789 gtk_text_view_expose_event (GtkWidget *widget, GdkEventExpose *event)
2790 {
2791   if (event->window == gtk_text_view_get_window (GTK_TEXT_VIEW (widget),
2792                                                  GTK_TEXT_WINDOW_TEXT))
2793     gtk_text_view_paint (widget, &event->area);
2794
2795   if (event->window == widget->window)
2796     gtk_widget_draw_focus (widget);
2797
2798   return TRUE;
2799 }
2800
2801 static void
2802 gtk_text_view_draw_focus (GtkWidget *widget)
2803 {
2804   if (GTK_WIDGET_DRAWABLE (widget))
2805     {
2806       if (GTK_WIDGET_HAS_FOCUS (widget))
2807         {
2808           gtk_paint_focus (widget->style, widget->window,
2809                            NULL, widget, "textview",
2810                            0, 0,
2811                            widget->allocation.width - 1,
2812                            widget->allocation.height - 1);
2813         }
2814       else
2815         {
2816           gdk_window_clear (widget->window);
2817         }
2818     }
2819 }
2820
2821 /*
2822  * Container
2823  */
2824
2825 static void
2826 gtk_text_view_add (GtkContainer *container,
2827                    GtkWidget    *child)
2828 {
2829   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
2830   g_return_if_fail (GTK_IS_WIDGET (child));
2831
2832   /* This is pretty random. */
2833   gtk_text_view_add_child_in_window (GTK_TEXT_VIEW (container),
2834                                      child,
2835                                      GTK_TEXT_WINDOW_WIDGET,
2836                                      0, 0);
2837 }
2838
2839 static void
2840 gtk_text_view_remove (GtkContainer *container,
2841                       GtkWidget    *child)
2842 {
2843   GSList *iter;
2844   GtkTextView *text_view;
2845   GtkTextViewChild *vc;
2846
2847   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
2848   g_return_if_fail (GTK_IS_WIDGET (child));
2849   g_return_if_fail (child->parent == (GtkWidget*) container);
2850
2851   text_view = GTK_TEXT_VIEW (container);
2852
2853   vc = NULL;
2854   iter = text_view->children;
2855
2856   while (iter != NULL)
2857     {
2858       vc = iter->data;
2859
2860       if (vc->widget == child)
2861         break;
2862
2863       iter = g_slist_next (iter);
2864     }
2865
2866   g_assert (iter != NULL); /* be sure we had the child in the list */
2867
2868   text_view->children = g_slist_remove (text_view->children, vc);
2869
2870   gtk_widget_unparent (vc->widget);
2871
2872   text_view_child_free (vc);
2873 }
2874
2875 static void
2876 gtk_text_view_forall (GtkContainer *container,
2877                       gboolean      include_internals,
2878                       GtkCallback   callback,
2879                       gpointer      callback_data)
2880 {
2881   GSList *iter;
2882   GtkTextView *text_view;
2883
2884   g_return_if_fail (GTK_IS_TEXT_VIEW (container));
2885   g_return_if_fail (callback != NULL);
2886
2887   text_view = GTK_TEXT_VIEW (container);
2888
2889   iter = text_view->children;
2890
2891   while (iter != NULL)
2892     {
2893       GtkTextViewChild *vc = iter->data;
2894
2895       (* callback) (vc->widget, callback_data);
2896
2897       iter = g_slist_next (iter);
2898     }
2899 }
2900
2901 /*
2902  * Blink!
2903  */
2904
2905 static gint
2906 blink_cb (gpointer data)
2907 {
2908   GtkTextView *text_view;
2909
2910   text_view = GTK_TEXT_VIEW (data);
2911
2912   g_assert (text_view->layout && GTK_WIDGET_HAS_FOCUS (text_view) && text_view->cursor_visible);
2913
2914   gtk_text_layout_set_cursor_visible (text_view->layout,
2915                                       !gtk_text_layout_get_cursor_visible (text_view->layout));
2916   return TRUE;
2917 }
2918
2919 static void
2920 gtk_text_view_start_cursor_blink (GtkTextView *text_view)
2921 {
2922   if (text_view->blink_timeout != 0)
2923     return;
2924
2925   text_view->blink_timeout = gtk_timeout_add (500, blink_cb, text_view);
2926 }
2927
2928 static void
2929 gtk_text_view_stop_cursor_blink (GtkTextView *text_view)
2930 {
2931   if (text_view->blink_timeout == 0)
2932     return;
2933
2934   gtk_timeout_remove (text_view->blink_timeout);
2935   text_view->blink_timeout = 0;
2936 }
2937
2938 /*
2939  * Key binding handlers
2940  */
2941
2942 static void
2943 gtk_text_view_move_iter_by_lines (GtkTextView *text_view,
2944                                   GtkTextIter *newplace,
2945                                   gint         count)
2946 {
2947   while (count < 0)
2948     {
2949       gtk_text_layout_move_iter_to_previous_line (text_view->layout, newplace);
2950       count++;
2951     }
2952
2953   while (count > 0)
2954     {
2955       gtk_text_layout_move_iter_to_next_line (text_view->layout, newplace);
2956       count--;
2957     }
2958 }
2959
2960 static void
2961 gtk_text_view_move_cursor (GtkTextView     *text_view,
2962                            GtkMovementStep  step,
2963                            gint             count,
2964                            gboolean         extend_selection)
2965 {
2966   GtkTextIter insert;
2967   GtkTextIter newplace;
2968
2969   gint cursor_x_pos = 0;
2970
2971   gtk_text_view_reset_im_context (text_view);
2972
2973   if (step == GTK_MOVEMENT_PAGES)
2974     {
2975       gtk_text_view_scroll_pages (text_view, count);
2976       return;
2977     }
2978
2979   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
2980                                     gtk_text_buffer_get_mark (get_buffer (text_view),
2981                                                               "insert"));
2982   newplace = insert;
2983
2984   if (step == GTK_MOVEMENT_DISPLAY_LINES)
2985     gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, NULL);
2986
2987   switch (step)
2988     {
2989     case GTK_MOVEMENT_CHARS:
2990       gtk_text_iter_forward_chars (&newplace, count);
2991       break;
2992
2993     case GTK_MOVEMENT_POSITIONS:
2994       gtk_text_layout_move_iter_visually (text_view->layout,
2995                                           &newplace, count);
2996       break;
2997
2998     case GTK_MOVEMENT_WORDS:
2999       if (count < 0)
3000         gtk_text_iter_backward_word_starts (&newplace, -count);
3001       else if (count > 0)
3002         gtk_text_iter_forward_word_ends (&newplace, count);
3003       break;
3004
3005     case GTK_MOVEMENT_DISPLAY_LINES:
3006       gtk_text_view_move_iter_by_lines (text_view, &newplace, count);
3007       gtk_text_layout_move_iter_to_x (text_view->layout, &newplace, cursor_x_pos);
3008       break;
3009
3010     case GTK_MOVEMENT_DISPLAY_LINE_ENDS:
3011       if (count > 1)
3012         gtk_text_view_move_iter_by_lines (text_view, &newplace, --count);
3013       else if (count < -1)
3014         gtk_text_view_move_iter_by_lines (text_view, &newplace, ++count);
3015
3016       if (count != 0)
3017         gtk_text_layout_move_iter_to_line_end (text_view->layout, &newplace, count);
3018       break;
3019
3020     case GTK_MOVEMENT_PARAGRAPHS:
3021       /* This should almost certainly instead be doing the parallel thing to WORD */
3022       /*       gtk_text_iter_down_lines (&newplace, count); */
3023       /* FIXME */
3024       break;
3025
3026     case GTK_MOVEMENT_PARAGRAPH_ENDS:
3027       if (count > 0)
3028         gtk_text_iter_forward_to_newline (&newplace);
3029       else if (count < 0)
3030         gtk_text_iter_set_line_offset (&newplace, 0);
3031       break;
3032
3033     case GTK_MOVEMENT_BUFFER_ENDS:
3034       if (count > 0)
3035         gtk_text_buffer_get_last_iter (get_buffer (text_view), &newplace);
3036       else if (count < 0)
3037         gtk_text_buffer_get_iter_at_offset (get_buffer (text_view), &newplace, 0);
3038       break;
3039
3040     default:
3041       break;
3042     }
3043
3044   if (!gtk_text_iter_equal (&insert, &newplace))
3045     {
3046       if (extend_selection)
3047         gtk_text_buffer_move_mark (get_buffer (text_view),
3048                                    gtk_text_buffer_get_mark (get_buffer (text_view),
3049                                                              "insert"),
3050                                    &newplace);
3051       else
3052         gtk_text_buffer_place_cursor (get_buffer (text_view), &newplace);
3053
3054       gtk_text_view_scroll_to_mark (text_view,
3055                                     gtk_text_buffer_get_mark (get_buffer (text_view),
3056                                                               "insert"), 0);
3057
3058       if (step == GTK_MOVEMENT_DISPLAY_LINES)
3059         {
3060           gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, -1);
3061         }
3062     }
3063 }
3064
3065 static void
3066 gtk_text_view_set_anchor (GtkTextView *text_view)
3067 {
3068   GtkTextIter insert;
3069
3070   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
3071                                     gtk_text_buffer_get_mark (get_buffer (text_view),
3072                                                               "insert"));
3073
3074   gtk_text_buffer_create_mark (get_buffer (text_view), "anchor", &insert, TRUE);
3075 }
3076
3077 static void
3078 gtk_text_view_scroll_pages (GtkTextView *text_view,
3079                             gint         count)
3080 {
3081   gfloat newval;
3082   GtkAdjustment *adj;
3083   gint cursor_x_pos, cursor_y_pos;
3084   GtkTextIter new_insert;
3085   GtkTextIter anchor;
3086   gint y0, y1;
3087
3088   g_return_if_fail (text_view->vadjustment != NULL);
3089
3090   adj = text_view->vadjustment;
3091
3092   /* Validate the region that will be brought into view by the cursor motion
3093    */
3094   if (count < 0)
3095     {
3096       gtk_text_view_get_first_para_iter (text_view, &anchor);
3097       y0 = adj->page_size;
3098       y1 = adj->page_size + count * adj->page_increment;
3099     }
3100   else
3101     {
3102       gtk_text_view_get_first_para_iter (text_view, &anchor);
3103       y0 = count * adj->page_increment + adj->page_size;
3104       y1 = 0;
3105     }
3106
3107   gtk_text_layout_validate_yrange (text_view->layout, &anchor, y0, y1);
3108
3109   gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, &cursor_y_pos);
3110
3111   newval = adj->value;
3112
3113   newval += count * adj->page_increment;
3114
3115   cursor_y_pos += newval - adj->value;
3116   set_adjustment_clamped (adj, newval);
3117
3118   gtk_text_layout_get_iter_at_pixel (text_view->layout, &new_insert, cursor_x_pos, cursor_y_pos);
3119   clamp_iter_onscreen (text_view, &new_insert);
3120   gtk_text_buffer_place_cursor (get_buffer (text_view), &new_insert);
3121
3122   gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, cursor_y_pos);
3123
3124   /* Adjust to have the cursor _entirely_ onscreen, move_mark_onscreen
3125    * only guarantees 1 pixel onscreen.
3126    */
3127   gtk_text_view_scroll_to_mark (text_view,
3128                                 gtk_text_buffer_get_mark (get_buffer (text_view),
3129                                                           "insert"),
3130                                 0);
3131 }
3132
3133 static gboolean
3134 whitespace (gunichar ch, gpointer user_data)
3135 {
3136   return (ch == ' ' || ch == '\t');
3137 }
3138
3139 static gboolean
3140 not_whitespace (gunichar ch, gpointer user_data)
3141 {
3142   return !whitespace (ch, user_data);
3143 }
3144
3145 static gboolean
3146 find_whitepace_region (const GtkTextIter *center,
3147                        GtkTextIter *start, GtkTextIter *end)
3148 {
3149   *start = *center;
3150   *end = *center;
3151
3152   if (gtk_text_iter_backward_find_char (start, not_whitespace, NULL, NULL))
3153     gtk_text_iter_next_char (start); /* we want the first whitespace... */
3154   if (whitespace (gtk_text_iter_get_char (end), NULL))
3155     gtk_text_iter_forward_find_char (end, not_whitespace, NULL, NULL);
3156
3157   return !gtk_text_iter_equal (start, end);
3158 }
3159
3160 static void
3161 gtk_text_view_insert_at_cursor (GtkTextView *text_view,
3162                                 const gchar *str)
3163 {
3164   gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
3165                                                 text_view->editable);
3166 }
3167
3168 static void
3169 gtk_text_view_delete_from_cursor (GtkTextView   *text_view,
3170                                 GtkDeleteType  type,
3171                                 gint           count)
3172 {
3173   GtkTextIter insert;
3174   GtkTextIter start;
3175   GtkTextIter end;
3176   gboolean leave_one = FALSE;
3177
3178   gtk_text_view_reset_im_context (text_view);
3179
3180   if (type == GTK_DELETE_CHARS)
3181     {
3182       /* Char delete deletes the selection, if one exists */
3183       if (gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
3184                                             text_view->editable))
3185         return;
3186     }
3187
3188   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
3189                                     &insert,
3190                                     gtk_text_buffer_get_mark (get_buffer (text_view),
3191                                                               "insert"));
3192
3193   start = insert;
3194   end = insert;
3195
3196   switch (type)
3197     {
3198     case GTK_DELETE_CHARS:
3199       gtk_text_iter_forward_chars (&end, count);
3200       break;
3201
3202     case GTK_DELETE_WORD_ENDS:
3203       if (count > 0)
3204         gtk_text_iter_forward_word_ends (&end, count);
3205       else if (count < 0)
3206         gtk_text_iter_backward_word_starts (&start, 0 - count);
3207       break;
3208
3209     case GTK_DELETE_WORDS:
3210       break;
3211
3212     case GTK_DELETE_DISPLAY_LINE_ENDS:
3213       break;
3214
3215     case GTK_DELETE_DISPLAY_LINES:
3216       break;
3217
3218     case GTK_DELETE_PARAGRAPH_ENDS:
3219       /* If we're already at a newline, we need to
3220        * simply delete that newline, instead of
3221        * moving to the next one.
3222        */
3223       if (gtk_text_iter_get_char (&end) == '\n')
3224         {
3225           gtk_text_iter_next_char (&end);
3226           --count;
3227         }
3228
3229       while (count > 0)
3230         {
3231           if (!gtk_text_iter_forward_to_newline (&end))
3232             break;
3233
3234           --count;
3235         }
3236
3237       /* FIXME figure out what a negative count means
3238          and support that */
3239       break;
3240
3241     case GTK_DELETE_PARAGRAPHS:
3242       if (count > 0)
3243         {
3244           gtk_text_iter_set_line_offset (&start, 0);
3245           gtk_text_iter_forward_to_newline (&end);
3246
3247           /* Do the lines beyond the first. */
3248           while (count > 1)
3249             {
3250               gtk_text_iter_forward_to_newline (&end);
3251
3252               --count;
3253             }
3254         }
3255
3256       /* FIXME negative count? */
3257
3258       break;
3259
3260     case GTK_DELETE_WHITESPACE:
3261       {
3262         find_whitepace_region (&insert, &start, &end);
3263       }
3264       break;
3265
3266     default:
3267       break;
3268     }
3269
3270   if (!gtk_text_iter_equal (&start, &end))
3271     {
3272       if (gtk_text_buffer_delete_interactive (get_buffer (text_view), &start, &end,
3273                                               text_view->editable))
3274         {
3275           if (leave_one)
3276             gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view),
3277                                                           " ", 1,
3278                                                           text_view->editable);
3279         }
3280
3281       gtk_text_view_scroll_to_mark (text_view,
3282                                     gtk_text_buffer_get_mark (get_buffer (text_view), "insert"),
3283                                     0);
3284     }
3285 }
3286
3287 static void
3288 gtk_text_view_cut_clipboard (GtkTextView *text_view)
3289 {
3290   gtk_text_buffer_cut_clipboard (get_buffer (text_view), text_view->editable);
3291   gtk_text_view_scroll_to_mark (text_view,
3292                                 gtk_text_buffer_get_mark (get_buffer (text_view),
3293                                                           "insert"),
3294                                 0);
3295 }
3296
3297 static void
3298 gtk_text_view_copy_clipboard (GtkTextView *text_view)
3299 {
3300   gtk_text_buffer_copy_clipboard (get_buffer (text_view));
3301   gtk_text_view_scroll_to_mark (text_view,
3302                                 gtk_text_buffer_get_mark (get_buffer (text_view),
3303                                                           "insert"),
3304                                 0);
3305 }
3306
3307 static void
3308 gtk_text_view_paste_clipboard (GtkTextView *text_view)
3309 {
3310   gtk_text_buffer_paste_clipboard (get_buffer (text_view), text_view->editable);
3311   gtk_text_view_scroll_to_mark (text_view,
3312                                 gtk_text_buffer_get_mark (get_buffer (text_view),
3313                                                           "insert"),
3314                                 0);
3315 }
3316
3317 static void
3318 gtk_text_view_toggle_overwrite (GtkTextView *text_view)
3319 {
3320   text_view->overwrite_mode = !text_view->overwrite_mode;
3321 }
3322
3323 /*
3324  * Selections
3325  */
3326
3327 static void
3328 gtk_text_view_unselect (GtkTextView *text_view)
3329 {
3330   GtkTextIter insert;
3331
3332   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
3333                                     &insert,
3334                                     gtk_text_buffer_get_mark (get_buffer (text_view),
3335                                                               "insert"));
3336
3337   gtk_text_buffer_move_mark (get_buffer (text_view),
3338                              gtk_text_buffer_get_mark (get_buffer (text_view),
3339                                                        "selection_bound"),
3340                              &insert);
3341 }
3342
3343 static gboolean
3344 move_insert_to_pointer_and_scroll (GtkTextView *text_view, gboolean partial_scroll)
3345 {
3346   gint x, y;
3347   GdkModifierType state;
3348   GtkTextIter newplace;
3349   gint adjust = 0;
3350   gboolean in_threshold = FALSE;
3351
3352   gdk_window_get_pointer (text_view->text_window->bin_window,
3353                           &x, &y, &state);
3354
3355   /* Adjust movement by how long we've been selecting, to
3356      get an acceleration effect. The exact numbers are
3357      pretty arbitrary. We have a threshold before we
3358      start to accelerate. */
3359   /* uncommenting this printf helps visualize how it works. */
3360   /*   printf ("%d\n", text_view->scrolling_accel_factor); */
3361
3362   if (text_view->scrolling_accel_factor > 10)
3363     adjust = (text_view->scrolling_accel_factor - 10) * 75;
3364
3365   if (y < 0) /* scrolling upward */
3366     adjust = -adjust;
3367
3368   /* No adjust if the pointer has moved back inside the window for sure.
3369      Also I'm adding a small threshold where no adjust is added,
3370      in case you want to do a continuous slow scroll. */
3371 #define SLOW_SCROLL_TH 7
3372   if (x >= (0 - SLOW_SCROLL_TH) &&
3373       x < (SCREEN_WIDTH (text_view) + SLOW_SCROLL_TH) &&
3374       y >= (0 - SLOW_SCROLL_TH) &&
3375       y < (SCREEN_HEIGHT (text_view) + SLOW_SCROLL_TH))
3376     {
3377       adjust = 0;
3378       in_threshold = TRUE;
3379     }
3380
3381   gtk_text_layout_get_iter_at_pixel (text_view->layout,
3382                                      &newplace,
3383                                      x + text_view->xoffset,
3384                                      y + text_view->yoffset + adjust);
3385
3386   {
3387     gboolean scrolled = FALSE;
3388     GtkTextMark *insert_mark =
3389       gtk_text_buffer_get_mark (get_buffer (text_view), "insert");
3390
3391     gtk_text_buffer_move_mark (get_buffer (text_view),
3392                                insert_mark,
3393                                &newplace);
3394
3395     if (partial_scroll)
3396       scrolled = gtk_text_view_scroll_to_mark_adjusted (text_view, insert_mark, 0, 0.7);
3397     else
3398       scrolled = gtk_text_view_scroll_to_mark_adjusted (text_view, insert_mark, 0, 1.0);
3399
3400     if (scrolled)
3401       {
3402         /* We want to avoid rapid jump to super-accelerated when you
3403            leave the slow scroll threshold after scrolling for a
3404            while. So we slowly decrease accel when scrolling inside
3405            the threshold.
3406         */
3407         if (in_threshold)
3408           {
3409             if (text_view->scrolling_accel_factor > 1)
3410               text_view->scrolling_accel_factor -= 2;
3411           }
3412         else
3413           text_view->scrolling_accel_factor += 1;
3414       }
3415     else
3416       {
3417         /* If we don't scroll we're probably inside the window, but
3418            potentially just a bit outside. We decrease acceleration
3419            while the user is fooling around inside the window.
3420            Acceleration decreases faster than it increases. */
3421         if (text_view->scrolling_accel_factor > 4)
3422           text_view->scrolling_accel_factor -= 5;
3423       }
3424
3425     return scrolled;
3426   }
3427 }
3428
3429 static gint
3430 selection_scan_timeout (gpointer data)
3431 {
3432   GtkTextView *text_view;
3433
3434   text_view = GTK_TEXT_VIEW (data);
3435
3436   if (move_insert_to_pointer_and_scroll (text_view, TRUE))
3437     {
3438       return TRUE; /* remain installed. */
3439     }
3440   else
3441     {
3442       text_view->selection_drag_scan_timeout = 0;
3443       return FALSE; /* remove ourselves */
3444     }
3445 }
3446
3447 static gint
3448 selection_motion_event_handler (GtkTextView *text_view, GdkEventMotion *event, gpointer data)
3449 {
3450   if (move_insert_to_pointer_and_scroll (text_view, TRUE))
3451     {
3452       /* If we had to scroll offscreen, insert a timeout to do so
3453          again. Note that in the timeout, even if the mouse doesn't
3454          move, due to this scroll xoffset/yoffset will have changed
3455          and we'll need to scroll again. */
3456       if (text_view->selection_drag_scan_timeout != 0) /* reset on every motion event */
3457         gtk_timeout_remove (text_view->selection_drag_scan_timeout);
3458
3459       text_view->selection_drag_scan_timeout =
3460         gtk_timeout_add (50, selection_scan_timeout, text_view);
3461     }
3462
3463   return TRUE;
3464 }
3465
3466 static void
3467 gtk_text_view_start_selection_drag (GtkTextView       *text_view,
3468                                     const GtkTextIter *iter,
3469                                     GdkEventButton    *button)
3470 {
3471   GtkTextIter newplace;
3472
3473   g_return_if_fail (text_view->selection_drag_handler == 0);
3474
3475   gtk_grab_add (GTK_WIDGET (text_view));
3476
3477   text_view->scrolling_accel_factor = 0;
3478
3479   newplace = *iter;
3480
3481   gtk_text_buffer_place_cursor (get_buffer (text_view), &newplace);
3482
3483   text_view->selection_drag_handler = gtk_signal_connect (GTK_OBJECT (text_view),
3484                                                           "motion_notify_event",
3485                                                           GTK_SIGNAL_FUNC (selection_motion_event_handler),
3486                                                           NULL);
3487 }
3488
3489 /* returns whether we were really dragging */
3490 static gboolean
3491 gtk_text_view_end_selection_drag (GtkTextView *text_view, GdkEventButton *event)
3492 {
3493   if (text_view->selection_drag_handler == 0)
3494     return FALSE;
3495
3496   gtk_signal_disconnect (GTK_OBJECT (text_view), text_view->selection_drag_handler);
3497   text_view->selection_drag_handler = 0;
3498
3499   text_view->scrolling_accel_factor = 0;
3500
3501   if (text_view->selection_drag_scan_timeout != 0)
3502     {
3503       gtk_timeout_remove (text_view->selection_drag_scan_timeout);
3504       text_view->selection_drag_scan_timeout = 0;
3505     }
3506
3507   /* one last update to current position */
3508   move_insert_to_pointer_and_scroll (text_view, FALSE);
3509
3510   gtk_grab_remove (GTK_WIDGET (text_view));
3511
3512   return TRUE;
3513 }
3514
3515 /*
3516  * Layout utils
3517  */
3518
3519 static void
3520 gtk_text_view_set_adjustment_upper (GtkAdjustment *adj, gfloat upper)
3521 {
3522   if (upper != adj->upper)
3523     {
3524       gfloat min = MAX (0., upper - adj->page_size);
3525       gboolean value_changed = FALSE;
3526
3527       adj->upper = upper;
3528
3529       if (adj->value > min)
3530         {
3531           adj->value = min;
3532           value_changed = TRUE;
3533         }
3534
3535       gtk_signal_emit_by_name (GTK_OBJECT (adj), "changed");
3536       if (value_changed)
3537         gtk_signal_emit_by_name (GTK_OBJECT (adj), "value_changed");
3538     }
3539 }
3540
3541 static void
3542 gtk_text_view_scroll_calc_now (GtkTextView *text_view)
3543 {
3544   gint width = 0, height = 0;
3545
3546   gtk_text_view_ensure_layout (text_view);
3547
3548
3549   gtk_text_layout_set_screen_width (text_view->layout,
3550                                     SCREEN_WIDTH (text_view));
3551
3552   gtk_text_layout_get_size (text_view->layout, &width, &height);
3553
3554   if (text_view->width != width || text_view->height != height)
3555     {
3556       text_view->width = width;
3557       text_view->height = height;
3558
3559       gtk_text_view_set_adjustment_upper (get_hadjustment (text_view),
3560                                           MAX (SCREEN_WIDTH (text_view), width));
3561       gtk_text_view_set_adjustment_upper (get_vadjustment (text_view),
3562                                           MAX (SCREEN_HEIGHT (text_view), height));
3563
3564       /* hadj/vadj exist since we called get_hadjustment/get_vadjustment above */
3565
3566       /* Set up the step sizes; we'll say that a page is
3567          our allocation minus one step, and a step is
3568          1/10 of our allocation. */
3569       text_view->hadjustment->step_increment =
3570         SCREEN_WIDTH (text_view) / 10.0;
3571       text_view->hadjustment->page_increment =
3572         SCREEN_WIDTH (text_view) * 0.9;
3573
3574       text_view->vadjustment->step_increment =
3575         SCREEN_HEIGHT (text_view) / 10.0;
3576       text_view->vadjustment->page_increment =
3577         SCREEN_HEIGHT (text_view) * 0.9;
3578     }
3579 }
3580
3581 static void
3582 gtk_text_view_set_attributes_from_style (GtkTextView        *text_view,
3583                                          GtkTextAttributes *values,
3584                                          GtkStyle           *style)
3585 {
3586   values->appearance.bg_color = style->base[GTK_STATE_NORMAL];
3587   values->appearance.fg_color = style->fg[GTK_STATE_NORMAL];
3588
3589   if (values->font.family_name)
3590     g_free (values->font.family_name);
3591
3592   values->font = *style->font_desc;
3593   values->font.family_name = g_strdup (style->font_desc->family_name);
3594 }
3595
3596 static void
3597 gtk_text_view_ensure_layout (GtkTextView *text_view)
3598 {
3599   GtkWidget *widget;
3600
3601   widget = GTK_WIDGET (text_view);
3602
3603   if (text_view->layout == NULL)
3604     {
3605       GtkTextAttributes *style;
3606       PangoContext *ltr_context, *rtl_context;
3607
3608       text_view->layout = gtk_text_layout_new ();
3609
3610       gtk_signal_connect (GTK_OBJECT (text_view->layout),
3611                           "invalidated",
3612                           GTK_SIGNAL_FUNC (invalidated_handler),
3613                           text_view);
3614
3615       gtk_signal_connect (GTK_OBJECT (text_view->layout),
3616                           "changed",
3617                           GTK_SIGNAL_FUNC (changed_handler),
3618                           text_view);
3619
3620       if (get_buffer (text_view))
3621         gtk_text_layout_set_buffer (text_view->layout, get_buffer (text_view));
3622
3623       if ((GTK_WIDGET_HAS_FOCUS (text_view) && text_view->cursor_visible))
3624         gtk_text_view_start_cursor_blink (text_view);
3625       else
3626         gtk_text_layout_set_cursor_visible (text_view->layout, FALSE);
3627
3628       ltr_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
3629       pango_context_set_base_dir (ltr_context, PANGO_DIRECTION_LTR);
3630       rtl_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
3631       pango_context_set_base_dir (rtl_context, PANGO_DIRECTION_RTL);
3632
3633       gtk_text_layout_set_contexts (text_view->layout, ltr_context, rtl_context);
3634
3635       g_object_unref (G_OBJECT (ltr_context));
3636       g_object_unref (G_OBJECT (rtl_context));
3637
3638       style = gtk_text_attributes_new ();
3639
3640       gtk_widget_ensure_style (widget);
3641       gtk_text_view_set_attributes_from_style (text_view,
3642                                                style, widget->style);
3643
3644       style->pixels_above_lines = text_view->pixels_above_lines;
3645       style->pixels_below_lines = text_view->pixels_below_lines;
3646       style->pixels_inside_wrap = text_view->pixels_inside_wrap;
3647       style->left_margin = text_view->left_margin;
3648       style->right_margin = text_view->right_margin;
3649       style->indent = text_view->indent;
3650       style->tabs = text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
3651
3652       style->wrap_mode = text_view->wrap_mode;
3653       style->justify = text_view->justify;
3654       style->direction = gtk_widget_get_direction (GTK_WIDGET (text_view));
3655
3656       gtk_text_layout_set_default_style (text_view->layout, style);
3657
3658       gtk_text_attributes_unref (style);
3659     }
3660 }
3661
3662 static void
3663 gtk_text_view_destroy_layout (GtkTextView *text_view)
3664 {
3665   if (text_view->layout)
3666     {
3667       gtk_text_view_stop_cursor_blink (text_view);
3668       gtk_text_view_end_selection_drag (text_view, NULL);
3669
3670       gtk_signal_disconnect_by_func (GTK_OBJECT (text_view->layout),
3671                                      invalidated_handler, text_view);
3672       gtk_signal_disconnect_by_func (GTK_OBJECT (text_view->layout),
3673                                      changed_handler, text_view);
3674       gtk_object_unref (GTK_OBJECT (text_view->layout));
3675       text_view->layout = NULL;
3676     }
3677 }
3678
3679 static void
3680 gtk_text_view_reset_im_context (GtkTextView *text_view)
3681 {
3682   if (text_view->need_im_reset)
3683     text_view->need_im_reset = 0;
3684
3685   gtk_im_context_reset (text_view->im_context);
3686 }
3687
3688 /*
3689  * DND feature
3690  */
3691
3692 static void
3693 gtk_text_view_start_selection_dnd (GtkTextView       *text_view,
3694                                    const GtkTextIter *iter,
3695                                    GdkEventMotion    *event)
3696 {
3697   GdkDragContext *context;
3698   GtkTargetList *target_list;
3699
3700   text_view->drag_start_x = -1;
3701   text_view->drag_start_y = -1;
3702
3703   target_list = gtk_target_list_new (target_table,
3704                                      G_N_ELEMENTS (target_table));
3705
3706   context = gtk_drag_begin (GTK_WIDGET (text_view), target_list,
3707                             GDK_ACTION_COPY | GDK_ACTION_MOVE,
3708                             1, (GdkEvent*)event);
3709
3710   gtk_target_list_unref (target_list);
3711
3712   gtk_drag_set_icon_default (context);
3713
3714   /* We're inside the selection, so start without being able
3715    * to accept the drag.
3716    */
3717   gdk_drag_status (context, 0, event->time);
3718   gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
3719 }
3720
3721 static void
3722 gtk_text_view_drag_begin (GtkWidget        *widget,
3723                           GdkDragContext   *context)
3724 {
3725
3726 }
3727
3728 static void
3729 gtk_text_view_drag_end (GtkWidget        *widget,
3730                         GdkDragContext   *context)
3731 {
3732   GtkTextView *text_view;
3733
3734   text_view = GTK_TEXT_VIEW (widget);
3735
3736   gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
3737 }
3738
3739 static void
3740 gtk_text_view_drag_data_get (GtkWidget        *widget,
3741                              GdkDragContext   *context,
3742                              GtkSelectionData *selection_data,
3743                              guint             info,
3744                              guint             time)
3745 {
3746   GtkTextView *text_view;
3747
3748   text_view = GTK_TEXT_VIEW (widget);
3749
3750   if (selection_data->target == gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE))
3751     {
3752       GtkTextBuffer *buffer = gtk_text_view_get_buffer (text_view);
3753
3754       gtk_selection_data_set (selection_data,
3755                               gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE),
3756                               8, /* bytes */
3757                               (void*)&buffer,
3758                               sizeof (buffer));
3759     }
3760   else
3761     {
3762       gchar *str;
3763       GtkTextIter start;
3764       GtkTextIter end;
3765
3766       str = NULL;
3767
3768       if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
3769                                                 &start, &end))
3770         {
3771           /* Extract the selected text */
3772           str = gtk_text_iter_get_visible_text (&start, &end);
3773         }
3774
3775       if (str)
3776         {
3777           gtk_selection_data_set_text (selection_data, str);
3778           g_free (str);
3779         }
3780     }
3781 }
3782
3783 static void
3784 gtk_text_view_drag_data_delete (GtkWidget        *widget,
3785                                 GdkDragContext   *context)
3786 {
3787   GtkTextView *text_view;
3788
3789   text_view = GTK_TEXT_VIEW (widget);
3790
3791   gtk_text_buffer_delete_selection (GTK_TEXT_VIEW (widget)->buffer,
3792                                     TRUE, GTK_TEXT_VIEW (widget)->editable);
3793 }
3794
3795 static void
3796 gtk_text_view_drag_leave (GtkWidget        *widget,
3797                           GdkDragContext   *context,
3798                           guint             time)
3799 {
3800
3801
3802 }
3803
3804 static gboolean
3805 gtk_text_view_drag_motion (GtkWidget        *widget,
3806                            GdkDragContext   *context,
3807                            gint              x,
3808                            gint              y,
3809                            guint             time)
3810 {
3811   GtkTextIter newplace;
3812   GtkTextView *text_view;
3813   GtkTextIter start;
3814   GtkTextIter end;
3815   GdkRectangle target_rect;
3816   gint bx, by;
3817
3818   text_view = GTK_TEXT_VIEW (widget);
3819
3820   target_rect = text_view->text_window->allocation;
3821
3822   if (x < target_rect.x ||
3823       y < target_rect.y ||
3824       x > (target_rect.x + target_rect.width) ||
3825       y > (target_rect.y + target_rect.height))
3826     return FALSE; /* outside the text window */
3827
3828   gtk_text_view_window_to_buffer_coords (text_view,
3829                                          GTK_TEXT_WINDOW_WIDGET,
3830                                          x, y,
3831                                          &bx, &by);
3832
3833   gtk_text_layout_get_iter_at_pixel (text_view->layout,
3834                                      &newplace,
3835                                      bx, by);
3836
3837   if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
3838                                             &start, &end) &&
3839       gtk_text_iter_in_range (&newplace, &start, &end))
3840     {
3841       /* We're inside the selection. */
3842       gdk_drag_status (context, 0, time);
3843       gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
3844     }
3845   else
3846     {
3847       if (gtk_text_iter_editable (&newplace, text_view->editable))
3848         {
3849           GtkWidget *source_widget;
3850           GdkDragAction suggested_action;
3851
3852           suggested_action = context->suggested_action;
3853
3854           source_widget = gtk_drag_get_source_widget (context);
3855
3856           if (source_widget == widget)
3857             {
3858               /* Default to MOVE, unless the user has
3859                * pressed ctrl or alt to affect available actions
3860                */
3861               if ((context->actions & GDK_ACTION_MOVE) != 0)
3862                 suggested_action = GDK_ACTION_MOVE;
3863             }
3864
3865           gtk_text_mark_set_visible (text_view->dnd_mark,
3866                                      text_view->cursor_visible);
3867
3868           gdk_drag_status (context, suggested_action, time);
3869         }
3870       else
3871         {
3872           /* Can't drop here. */
3873           gdk_drag_status (context, 0, time);
3874           gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
3875         }
3876     }
3877
3878   gtk_text_buffer_move_mark (get_buffer (text_view),
3879                              gtk_text_buffer_get_mark (get_buffer (text_view),
3880                                                        "gtk_drag_target"),
3881                              &newplace);
3882
3883   {
3884     /* The effect of this is that the text scrolls if you're near
3885        the edge. We have to scroll whether or not we're inside
3886        the selection. */
3887     gint margin;
3888
3889     margin = MIN (SCREEN_WIDTH (widget), SCREEN_HEIGHT (widget));
3890     margin /= 5;
3891
3892     gtk_text_view_scroll_to_mark_adjusted (text_view,
3893                                            gtk_text_buffer_get_mark (get_buffer (text_view),
3894                                                                      "gtk_drag_target"),
3895                                            margin, 1.0);
3896   }
3897
3898   return TRUE;
3899 }
3900
3901 static gboolean
3902 gtk_text_view_drag_drop (GtkWidget        *widget,
3903                          GdkDragContext   *context,
3904                          gint              x,
3905                          gint              y,
3906                          guint             time)
3907 {
3908 #if 0
3909   /* called automatically. */
3910   if (context->targets)
3911     {
3912       gtk_drag_get_data (widget, context,
3913                          GPOINTER_TO_INT (context->targets->data),
3914                          time);
3915       return TRUE;
3916     }
3917   else
3918     return FALSE;
3919 #endif
3920   return TRUE;
3921 }
3922
3923 static void
3924 insert_text_data (GtkTextView      *text_view,
3925                   GtkTextIter      *drop_point,
3926                   GtkSelectionData *selection_data)
3927 {
3928   gchar *str;
3929
3930   str = gtk_selection_data_get_text (selection_data);
3931
3932   if (str)
3933     {
3934       gtk_text_buffer_insert_interactive (get_buffer (text_view),
3935                                           drop_point, str, -1,
3936                                           text_view->editable);
3937       g_free (str);
3938     }
3939 }
3940
3941 static void
3942 gtk_text_view_drag_data_received (GtkWidget        *widget,
3943                                   GdkDragContext   *context,
3944                                   gint              x,
3945                                   gint              y,
3946                                   GtkSelectionData *selection_data,
3947                                   guint             info,
3948                                   guint             time)
3949 {
3950   GtkTextIter drop_point;
3951   GtkTextView *text_view;
3952   GtkTextMark *drag_target_mark;
3953
3954   text_view = GTK_TEXT_VIEW (widget);
3955
3956   drag_target_mark = gtk_text_buffer_get_mark (get_buffer (text_view),
3957                                                "gtk_drag_target");
3958
3959   if (drag_target_mark == NULL)
3960     return;
3961
3962   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
3963                                     &drop_point,
3964                                     drag_target_mark);
3965
3966   if (selection_data->target == gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE))
3967     {
3968       GtkTextBuffer *src_buffer = NULL;
3969       GtkTextIter start, end;
3970       gboolean copy_tags = TRUE;
3971
3972       if (selection_data->length != sizeof (src_buffer))
3973         return;
3974
3975       memcpy (&src_buffer, selection_data->data, sizeof (src_buffer));
3976
3977       if (src_buffer == NULL)
3978         return;
3979
3980       g_return_if_fail (GTK_IS_TEXT_BUFFER (src_buffer));
3981
3982       if (gtk_text_buffer_get_tag_table (src_buffer) !=
3983           gtk_text_buffer_get_tag_table (get_buffer (text_view)))
3984         copy_tags = FALSE;
3985
3986       if (gtk_text_buffer_get_selection_bounds (src_buffer,
3987                                                 &start,
3988                                                 &end))
3989         {
3990           if (copy_tags)
3991             gtk_text_buffer_insert_range_interactive (get_buffer (text_view),
3992                                                       &drop_point,
3993                                                       &start,
3994                                                       &end,
3995                                                       text_view->editable);
3996           else
3997             {
3998               gchar *str;
3999
4000               str = gtk_text_iter_get_visible_text (&start, &end);
4001               gtk_text_buffer_insert_interactive (get_buffer (text_view),
4002                                                   &drop_point, str, -1,
4003                                                   text_view->editable);
4004               g_free (str);
4005             }
4006         }
4007     }
4008   else
4009     insert_text_data (text_view, &drop_point, selection_data);
4010 }
4011
4012 static GtkAdjustment*
4013 get_hadjustment (GtkTextView *text_view)
4014 {
4015   if (text_view->hadjustment == NULL)
4016     gtk_text_view_set_scroll_adjustments (text_view,
4017                                           NULL, /* forces creation */
4018                                           text_view->vadjustment);
4019
4020   return text_view->hadjustment;
4021 }
4022
4023 static GtkAdjustment*
4024 get_vadjustment (GtkTextView *text_view)
4025 {
4026   if (text_view->vadjustment == NULL)
4027     gtk_text_view_set_scroll_adjustments (text_view,
4028                                           text_view->hadjustment,
4029                                           NULL); /* forces creation */
4030   return text_view->vadjustment;
4031 }
4032
4033
4034 static void
4035 gtk_text_view_set_scroll_adjustments (GtkTextView   *text_view,
4036                                       GtkAdjustment *hadj,
4037                                       GtkAdjustment *vadj)
4038 {
4039   gboolean need_adjust = FALSE;
4040
4041   g_return_if_fail (text_view != NULL);
4042   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
4043
4044   if (hadj)
4045     g_return_if_fail (GTK_IS_ADJUSTMENT (hadj));
4046   else
4047     hadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
4048   if (vadj)
4049     g_return_if_fail (GTK_IS_ADJUSTMENT (vadj));
4050   else
4051     vadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
4052
4053   if (text_view->hadjustment && (text_view->hadjustment != hadj))
4054     {
4055       gtk_signal_disconnect_by_data (GTK_OBJECT (text_view->hadjustment), text_view);
4056       gtk_object_unref (GTK_OBJECT (text_view->hadjustment));
4057     }
4058
4059   if (text_view->vadjustment && (text_view->vadjustment != vadj))
4060     {
4061       gtk_signal_disconnect_by_data (GTK_OBJECT (text_view->vadjustment), text_view);
4062       gtk_object_unref (GTK_OBJECT (text_view->vadjustment));
4063     }
4064
4065   if (text_view->hadjustment != hadj)
4066     {
4067       text_view->hadjustment = hadj;
4068       gtk_object_ref (GTK_OBJECT (text_view->hadjustment));
4069       gtk_object_sink (GTK_OBJECT (text_view->hadjustment));
4070
4071       gtk_signal_connect (GTK_OBJECT (text_view->hadjustment), "value_changed",
4072                           (GtkSignalFunc) gtk_text_view_value_changed,
4073                           text_view);
4074       need_adjust = TRUE;
4075     }
4076
4077   if (text_view->vadjustment != vadj)
4078     {
4079       text_view->vadjustment = vadj;
4080       gtk_object_ref (GTK_OBJECT (text_view->vadjustment));
4081       gtk_object_sink (GTK_OBJECT (text_view->vadjustment));
4082
4083       gtk_signal_connect (GTK_OBJECT (text_view->vadjustment), "value_changed",
4084                           (GtkSignalFunc) gtk_text_view_value_changed,
4085                           text_view);
4086       need_adjust = TRUE;
4087     }
4088
4089   if (need_adjust)
4090     gtk_text_view_value_changed (NULL, text_view);
4091 }
4092
4093 static void
4094 gtk_text_view_value_changed (GtkAdjustment *adj,
4095                              GtkTextView   *text_view)
4096 {
4097   GtkTextIter iter;
4098   gint line_top;
4099   gint dx = 0;
4100   gint dy = 0;
4101
4102   if (adj == text_view->hadjustment)
4103     {
4104       dx = text_view->xoffset - (gint)adj->value;
4105       text_view->xoffset = adj->value;
4106     }
4107   else if (adj == text_view->vadjustment)
4108     {
4109       dy = text_view->yoffset - (gint)adj->value;
4110       text_view->yoffset = adj->value;
4111
4112       if (text_view->layout)
4113         {
4114           gtk_text_layout_get_line_at_y (text_view->layout, &iter, adj->value, &line_top);
4115
4116           gtk_text_buffer_move_mark (get_buffer (text_view), text_view->first_para_mark, &iter);
4117
4118           text_view->first_para_pixels = adj->value - line_top;
4119         }
4120     }
4121
4122   if (GTK_WIDGET_REALIZED (text_view) && (dx != 0 || dy != 0))
4123     {
4124       if (dy != 0)
4125         {
4126           if (text_view->left_window)
4127             text_window_scroll (text_view->left_window, 0, dy);
4128           if (text_view->right_window)
4129             text_window_scroll (text_view->right_window, 0, dy);
4130         }
4131
4132       if (dx != 0)
4133         {
4134           if (text_view->top_window)
4135             text_window_scroll (text_view->top_window, dx, 0);
4136           if (text_view->bottom_window)
4137             text_window_scroll (text_view->bottom_window, dx, 0);
4138         }
4139
4140       /* It looks nicer to scroll the main area last, because
4141        * it takes a while, and making the side areas update
4142        * afterward emphasizes the slowness of scrolling the
4143        * main area.
4144        */
4145       text_window_scroll (text_view->text_window, dx, dy);
4146     }
4147 }
4148
4149 static void
4150 gtk_text_view_commit_handler (GtkIMContext  *context,
4151                               const gchar   *str,
4152                               GtkTextView   *text_view)
4153 {
4154   gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
4155                                     text_view->editable);
4156
4157   if (!strcmp (str, "\n"))
4158     {
4159       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\n", 1,
4160                                                     text_view->editable);
4161     }
4162   else
4163     {
4164       if (text_view->overwrite_mode)
4165         gtk_text_view_delete_from_cursor (text_view, GTK_DELETE_CHARS, 1);
4166       gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
4167                                                     text_view->editable);
4168     }
4169
4170   gtk_text_view_scroll_to_mark (text_view,
4171                                 gtk_text_buffer_get_mark (get_buffer (text_view),
4172                                                           "insert"),
4173                                 0);
4174 }
4175
4176 static void
4177 gtk_text_view_preedit_changed_handler (GtkIMContext *context,
4178                                        GtkTextView  *text_view)
4179 {
4180   gchar *str;
4181   PangoAttrList *attrs;
4182   gint cursor_pos;
4183
4184   gtk_im_context_get_preedit_string (context, &str, &attrs, &cursor_pos);
4185   gtk_text_layout_set_preedit_string (text_view->layout, str, attrs, cursor_pos);
4186
4187   pango_attr_list_unref (attrs);
4188   g_free (str);
4189 }
4190
4191 static void
4192 gtk_text_view_mark_set_handler (GtkTextBuffer     *buffer,
4193                                 const GtkTextIter *location,
4194                                 GtkTextMark       *mark,
4195                                 gpointer           data)
4196 {
4197   GtkTextView *text_view = GTK_TEXT_VIEW (data);
4198   gboolean need_reset = FALSE;
4199
4200   if (mark == gtk_text_buffer_get_insert (buffer))
4201     {
4202       text_view->virtual_cursor_x = -1;
4203       text_view->virtual_cursor_y = -1;
4204       need_reset = TRUE;
4205     }
4206   else if (mark == gtk_text_buffer_get_selection_bound (buffer))
4207     {
4208       need_reset = TRUE;
4209     }
4210
4211   if (need_reset)
4212     gtk_text_view_reset_im_context (text_view);
4213 }
4214
4215 static void
4216 gtk_text_view_get_virtual_cursor_pos (GtkTextView *text_view,
4217                                       gint        *x,
4218                                       gint        *y)
4219 {
4220   GdkRectangle strong_pos;
4221   GtkTextIter insert;
4222
4223   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
4224                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4225                                                               "insert"));
4226
4227   if ((x && text_view->virtual_cursor_x == -1) ||
4228       (y && text_view->virtual_cursor_y == -1))
4229     gtk_text_layout_get_cursor_locations (text_view->layout, &insert, &strong_pos, NULL);
4230
4231   if (x)
4232     {
4233       if (text_view->virtual_cursor_x != -1)
4234         *x = text_view->virtual_cursor_x;
4235       else
4236         *x = strong_pos.x;
4237     }
4238
4239   if (y)
4240     {
4241       if (text_view->virtual_cursor_x != -1)
4242         *y = text_view->virtual_cursor_y;
4243       else
4244         *y = strong_pos.y + strong_pos.height / 2;
4245     }
4246 }
4247
4248 static void
4249 gtk_text_view_set_virtual_cursor_pos (GtkTextView *text_view,
4250                                       gint         x,
4251                                       gint         y)
4252 {
4253   GdkRectangle strong_pos;
4254   GtkTextIter insert;
4255
4256   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
4257                                     gtk_text_buffer_get_mark (get_buffer (text_view),
4258                                                               "insert"));
4259
4260   if (x == -1 || y == -1)
4261     gtk_text_layout_get_cursor_locations (text_view->layout, &insert, &strong_pos, NULL);
4262
4263   text_view->virtual_cursor_x = (x == -1) ? strong_pos.x : x;
4264   text_view->virtual_cursor_y = (y == -1) ? strong_pos.y + strong_pos.height / 2 : y;
4265 }
4266
4267 /* Quick hack of a popup menu
4268  */
4269 static void
4270 activate_cb (GtkWidget   *menuitem,
4271              GtkTextView *text_view)
4272 {
4273   const gchar *signal = gtk_object_get_data (GTK_OBJECT (menuitem), "gtk-signal");
4274   gtk_signal_emit_by_name (GTK_OBJECT (text_view), signal);
4275 }
4276
4277 static void
4278 append_action_signal (GtkTextView  *text_view,
4279                       GtkWidget    *menu,
4280                       const gchar  *label,
4281                       const gchar  *signal)
4282 {
4283   GtkWidget *menuitem = gtk_menu_item_new_with_label (label);
4284
4285   gtk_object_set_data (GTK_OBJECT (menuitem), "gtk-signal", (char *)signal);
4286   gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
4287                       activate_cb, text_view);
4288
4289   gtk_widget_show (menuitem);
4290   gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
4291 }
4292
4293 static void
4294 popup_menu_detach (GtkWidget *attach_widget,
4295                    GtkMenu   *menu)
4296 {
4297   GTK_TEXT_VIEW (attach_widget)->popup_menu = NULL;
4298 }
4299
4300 static void
4301 gtk_text_view_popup_menu (GtkTextView    *text_view,
4302                           GdkEventButton *event)
4303 {
4304   if (!text_view->popup_menu)
4305     {
4306       GtkWidget *menuitem;
4307
4308       text_view->popup_menu = gtk_menu_new ();
4309
4310       gtk_menu_attach_to_widget (GTK_MENU (text_view->popup_menu),
4311                                  GTK_WIDGET (text_view),
4312                                  popup_menu_detach);
4313
4314       append_action_signal (text_view, text_view->popup_menu, _("Cut"), "cut_clipboard");
4315       append_action_signal (text_view, text_view->popup_menu, _("Copy"), "copy_clipboard");
4316       append_action_signal (text_view, text_view->popup_menu, _("Paste"), "paste_clipboard");
4317
4318       menuitem = gtk_menu_item_new (); /* Separator */
4319       gtk_widget_show (menuitem);
4320       gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
4321
4322       gtk_im_multicontext_append_menuitems (GTK_IM_MULTICONTEXT (text_view->im_context),
4323                                             GTK_MENU_SHELL (text_view->popup_menu));
4324     }
4325
4326   gtk_menu_popup (GTK_MENU (text_view->popup_menu), NULL, NULL,
4327                   NULL, NULL,
4328                   event->button, event->time);
4329 }
4330
4331
4332
4333 /* Child GdkWindows */
4334
4335
4336 static GtkTextWindow*
4337 text_window_new (GtkTextWindowType  type,
4338                  GtkWidget         *widget,
4339                  gint               width_request,
4340                  gint               height_request)
4341 {
4342   GtkTextWindow *win;
4343
4344   win = g_new (GtkTextWindow, 1);
4345
4346   win->type = type;
4347   win->widget = widget;
4348   win->window = NULL;
4349   win->bin_window = NULL;
4350   win->requisition.width = width_request;
4351   win->requisition.height = height_request;
4352   win->allocation.width = width_request;
4353   win->allocation.height = height_request;
4354   win->allocation.x = 0;
4355   win->allocation.y = 0;
4356
4357   return win;
4358 }
4359
4360 static void
4361 text_window_free (GtkTextWindow *win)
4362 {
4363   if (win->window)
4364     text_window_unrealize (win);
4365
4366   g_free (win);
4367 }
4368
4369 static void
4370 text_window_realize (GtkTextWindow *win,
4371                      GdkWindow     *parent)
4372 {
4373   GdkWindowAttr attributes;
4374   gint attributes_mask;
4375   GdkCursor *cursor;
4376
4377   attributes.window_type = GDK_WINDOW_CHILD;
4378   attributes.x = win->allocation.x;
4379   attributes.y = win->allocation.y;
4380   attributes.width = win->allocation.width;
4381   attributes.height = win->allocation.height;
4382   attributes.wclass = GDK_INPUT_OUTPUT;
4383   attributes.visual = gtk_widget_get_visual (win->widget);
4384   attributes.colormap = gtk_widget_get_colormap (win->widget);
4385   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK;
4386
4387   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
4388
4389   win->window = gdk_window_new (parent,
4390                                 &attributes,
4391                                 attributes_mask);
4392
4393   gdk_window_show (win->window);
4394   gdk_window_set_user_data (win->window, win->widget);
4395
4396   attributes.x = 0;
4397   attributes.y = 0;
4398   attributes.width = win->allocation.width;
4399   attributes.height = win->allocation.height;
4400   attributes.event_mask = (GDK_EXPOSURE_MASK            |
4401                            GDK_SCROLL_MASK              |
4402                            GDK_KEY_PRESS_MASK           |
4403                            GDK_BUTTON_PRESS_MASK        |
4404                            GDK_BUTTON_RELEASE_MASK      |
4405                            GDK_POINTER_MOTION_MASK      |
4406                            GDK_POINTER_MOTION_HINT_MASK |
4407                            gtk_widget_get_events (win->widget));
4408
4409   win->bin_window = gdk_window_new (win->window,
4410                                     &attributes,
4411                                     attributes_mask);
4412
4413   gdk_window_show (win->bin_window);
4414   gdk_window_set_user_data (win->bin_window, win->widget);
4415
4416   if (win->type == GTK_TEXT_WINDOW_TEXT)
4417     {
4418       /* I-beam cursor */
4419       cursor = gdk_cursor_new (GDK_XTERM);
4420       gdk_window_set_cursor (win->bin_window, cursor);
4421       gdk_cursor_destroy (cursor);
4422
4423       gtk_im_context_set_client_window (GTK_TEXT_VIEW (win->widget)->im_context,
4424                                         win->window);
4425
4426
4427       gdk_window_set_background (win->bin_window,
4428                                  &win->widget->style->base[GTK_WIDGET_STATE (win->widget)]);
4429     }
4430   else
4431     {
4432       gdk_window_set_background (win->bin_window,
4433                                  &win->widget->style->bg[GTK_WIDGET_STATE (win->widget)]);
4434     }
4435
4436   g_object_set_qdata (G_OBJECT (win->window),
4437                       g_quark_from_static_string ("gtk-text-view-text-window"),
4438                       win);
4439
4440   g_object_set_qdata (G_OBJECT (win->bin_window),
4441                       g_quark_from_static_string ("gtk-text-view-text-window"),
4442                       win);
4443 }
4444
4445 static void
4446 text_window_unrealize (GtkTextWindow *win)
4447 {
4448   if (win->type == GTK_TEXT_WINDOW_TEXT)
4449     {
4450       gtk_im_context_set_client_window (GTK_TEXT_VIEW (win->widget)->im_context,
4451                                         NULL);
4452     }
4453
4454   gdk_window_set_user_data (win->window, NULL);
4455   gdk_window_set_user_data (win->bin_window, NULL);
4456   gdk_window_destroy (win->bin_window);
4457   gdk_window_destroy (win->window);
4458   win->window = NULL;
4459   win->bin_window = NULL;
4460 }
4461
4462 static void
4463 text_window_size_allocate (GtkTextWindow *win,
4464                            GdkRectangle  *rect)
4465 {
4466   win->allocation = *rect;
4467
4468   if (win->window)
4469     {
4470       gdk_window_move_resize (win->window,
4471                               rect->x, rect->y,
4472                               rect->width, rect->height);
4473
4474       gdk_window_resize (win->bin_window,
4475                          rect->width, rect->height);
4476     }
4477 }
4478
4479 static void
4480 text_window_scroll        (GtkTextWindow *win,
4481                            gint           dx,
4482                            gint           dy)
4483 {
4484   if (dx != 0 || dy != 0)
4485     {
4486       gdk_window_scroll (win->bin_window, dx, dy);
4487       gdk_window_process_updates (win->bin_window, TRUE);
4488     }
4489 }
4490
4491 static void
4492 text_window_invalidate_rect (GtkTextWindow *win,
4493                              GdkRectangle  *rect)
4494 {
4495   GdkRectangle window_rect;
4496
4497   gtk_text_view_buffer_to_window_coords (GTK_TEXT_VIEW (win->widget),
4498                                          win->type,
4499                                          rect->x,
4500                                          rect->y,
4501                                          &window_rect.x,
4502                                          &window_rect.y);
4503
4504   window_rect.width = rect->width;
4505   window_rect.height = rect->height;
4506
4507   /* Adjust the rect as appropriate */
4508
4509   switch (win->type)
4510     {
4511     case GTK_TEXT_WINDOW_TEXT:
4512       break;
4513
4514     case GTK_TEXT_WINDOW_LEFT:
4515     case GTK_TEXT_WINDOW_RIGHT:
4516       window_rect.x = 0;
4517       window_rect.width = win->allocation.width;
4518       break;
4519
4520     case GTK_TEXT_WINDOW_TOP:
4521     case GTK_TEXT_WINDOW_BOTTOM:
4522       window_rect.y = 0;
4523       window_rect.height = win->allocation.height;
4524       break;
4525
4526     default:
4527       g_warning ("%s: bug!", G_STRLOC);
4528       return;
4529       break;
4530     }
4531
4532   gdk_window_invalidate_rect (win->bin_window, &window_rect, FALSE);
4533 }
4534
4535 static gint
4536 text_window_get_width (GtkTextWindow *win)
4537 {
4538   return win->allocation.width;
4539 }
4540
4541 static gint
4542 text_window_get_height (GtkTextWindow *win)
4543 {
4544   return win->allocation.height;
4545 }
4546
4547 static void
4548 text_window_get_allocation (GtkTextWindow *win,
4549                             GdkRectangle  *rect)
4550 {
4551   *rect = win->allocation;
4552 }
4553
4554 /* Windows */
4555
4556
4557 /**
4558  * gtk_text_view_get_window:
4559  * @text_view: a #GtkTextView
4560  * @win: window to get
4561  *
4562  * Retrieves the #GdkWindow corresponding to an area of the text view;
4563  * possible windows include the overall widget window, child windows
4564  * on the left, right, top, bottom, and the window that displays the
4565  * text buffer. Windows are %NULL and nonexistent if their width or
4566  * height is 0, and are nonexistent before the widget has been
4567  * realized.
4568  *
4569  * Return value: a #GdkWindow, or %NULL
4570  **/
4571 GdkWindow*
4572 gtk_text_view_get_window (GtkTextView *text_view,
4573                           GtkTextWindowType win)
4574 {
4575   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
4576
4577   switch (win)
4578     {
4579     case GTK_TEXT_WINDOW_WIDGET:
4580       return GTK_WIDGET (text_view)->window;
4581       break;
4582
4583     case GTK_TEXT_WINDOW_TEXT:
4584       return text_view->text_window->bin_window;
4585       break;
4586
4587     case GTK_TEXT_WINDOW_LEFT:
4588       if (text_view->left_window)
4589         return text_view->left_window->bin_window;
4590       else
4591         return NULL;
4592       break;
4593
4594     case GTK_TEXT_WINDOW_RIGHT:
4595       if (text_view->right_window)
4596         return text_view->right_window->bin_window;
4597       else
4598         return NULL;
4599       break;
4600
4601     case GTK_TEXT_WINDOW_TOP:
4602       if (text_view->top_window)
4603         return text_view->top_window->bin_window;
4604       else
4605         return NULL;
4606       break;
4607
4608     case GTK_TEXT_WINDOW_BOTTOM:
4609       if (text_view->bottom_window)
4610         return text_view->bottom_window->bin_window;
4611       else
4612         return NULL;
4613       break;
4614
4615     default:
4616       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
4617       return NULL;
4618       break;
4619     }
4620 }
4621
4622 /**
4623  * gtk_text_view_get_window_type:
4624  * @text_view: a #GtkTextView
4625  * @window: a window type
4626  *
4627  * Usually used to find out which window an event corresponds to.
4628  * If you connect to an event signal on @text_view, this function
4629  * should be called on <literal>event-&gt;window</literal> to
4630  * see which window it was.
4631  *
4632  * Return value: the window type.
4633  **/
4634 GtkTextWindowType
4635 gtk_text_view_get_window_type (GtkTextView *text_view,
4636                                GdkWindow   *window)
4637 {
4638   GtkTextWindow *win;
4639
4640   g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
4641   g_return_val_if_fail (GDK_IS_WINDOW (text_view), 0);
4642
4643   if (window == GTK_WIDGET (text_view)->window)
4644     return GTK_TEXT_WINDOW_WIDGET;
4645
4646   win = g_object_get_qdata (G_OBJECT (window),
4647                             g_quark_try_string ("gtk-text-view-text-window"));
4648
4649   if (win)
4650     return win->type;
4651   else
4652     {
4653       return GTK_TEXT_WINDOW_PRIVATE;
4654     }
4655 }
4656
4657 static void
4658 buffer_to_widget (GtkTextView      *text_view,
4659                   gint              buffer_x,
4660                   gint              buffer_y,
4661                   gint             *window_x,
4662                   gint             *window_y)
4663 {
4664   if (window_x)
4665     {
4666       *window_x = buffer_x - text_view->xoffset + FOCUS_EDGE_WIDTH;
4667       if (text_view->left_window)
4668         *window_x += text_view->left_window->allocation.width;
4669     }
4670
4671   if (window_y)
4672     {
4673       *window_y = buffer_y - text_view->yoffset + FOCUS_EDGE_WIDTH;
4674       if (text_view->top_window)
4675         *window_y += text_view->top_window->allocation.height;
4676     }
4677 }
4678
4679 static void
4680 widget_to_text_window (GtkTextWindow *win,
4681                        gint           widget_x,
4682                        gint           widget_y,
4683                        gint          *window_x,
4684                        gint          *window_y)
4685 {
4686   if (window_x)
4687     *window_x = widget_x - win->allocation.x;
4688
4689   if (window_y)
4690     *window_y = widget_y - win->allocation.y;
4691 }
4692
4693 static void
4694 buffer_to_text_window (GtkTextView   *text_view,
4695                        GtkTextWindow *win,
4696                        gint           buffer_x,
4697                        gint           buffer_y,
4698                        gint          *window_x,
4699                        gint          *window_y)
4700 {
4701   if (win == NULL)
4702     {
4703       g_warning ("Attempt to convert text buffer coordinates to coordinates "
4704                  "for a nonexistent or private child window of GtkTextView");
4705       return;
4706     }
4707
4708   buffer_to_widget (text_view,
4709                     buffer_x, buffer_y,
4710                     window_x, window_y);
4711
4712   widget_to_text_window (win,
4713                          window_x ? *window_x : 0,
4714                          window_y ? *window_y : 0,
4715                          window_x,
4716                          window_y);
4717 }
4718
4719 /**
4720  * gtk_text_view_buffer_to_window_coords:
4721  * @text_view: a #GtkTextView
4722  * @win: a #GtkTextWindowType
4723  * @buffer_x: buffer x coordinate
4724  * @buffer_y: buffer y coordinate
4725  * @window_x: window x coordinate return location
4726  * @window_y: window y coordinate return location
4727  *
4728  * Converts coordinate (@buffer_x, @buffer_y) to coordinates for the window
4729  * @win, and stores the result in (@window_x, @window_y).
4730  **/
4731 void
4732 gtk_text_view_buffer_to_window_coords (GtkTextView      *text_view,
4733                                        GtkTextWindowType win,
4734                                        gint              buffer_x,
4735                                        gint              buffer_y,
4736                                        gint             *window_x,
4737                                        gint             *window_y)
4738 {
4739   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
4740
4741   switch (win)
4742     {
4743     case GTK_TEXT_WINDOW_WIDGET:
4744       buffer_to_widget (text_view,
4745                         buffer_x, buffer_y,
4746                         window_x, window_y);
4747       break;
4748
4749     case GTK_TEXT_WINDOW_TEXT:
4750       if (window_x)
4751         *window_x = buffer_x - text_view->xoffset;
4752       if (window_y)
4753         *window_y = buffer_y - text_view->yoffset;
4754       break;
4755
4756     case GTK_TEXT_WINDOW_LEFT:
4757       buffer_to_text_window (text_view,
4758                              text_view->left_window,
4759                              buffer_x, buffer_y,
4760                              window_x, window_y);
4761       break;
4762
4763     case GTK_TEXT_WINDOW_RIGHT:
4764       buffer_to_text_window (text_view,
4765                              text_view->right_window,
4766                              buffer_x, buffer_y,
4767                              window_x, window_y);
4768       break;
4769
4770     case GTK_TEXT_WINDOW_TOP:
4771       buffer_to_text_window (text_view,
4772                              text_view->top_window,
4773                              buffer_x, buffer_y,
4774                              window_x, window_y);
4775       break;
4776
4777     case GTK_TEXT_WINDOW_BOTTOM:
4778       buffer_to_text_window (text_view,
4779                              text_view->bottom_window,
4780                              buffer_x, buffer_y,
4781                              window_x, window_y);
4782       break;
4783
4784     case GTK_TEXT_WINDOW_PRIVATE:
4785       g_warning ("%s: can't get coords for private windows", G_STRLOC);
4786       break;
4787
4788     default:
4789       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
4790       break;
4791     }
4792 }
4793
4794 static void
4795 widget_to_buffer (GtkTextView *text_view,
4796                   gint         widget_x,
4797                   gint         widget_y,
4798                   gint        *buffer_x,
4799                   gint        *buffer_y)
4800 {
4801   if (buffer_x)
4802     {
4803       *buffer_x = widget_x - FOCUS_EDGE_WIDTH + text_view->xoffset;
4804       if (text_view->left_window)
4805         *buffer_x -= text_view->left_window->allocation.width;
4806     }
4807
4808   if (buffer_y)
4809     {
4810       *buffer_y = widget_y - FOCUS_EDGE_WIDTH + text_view->yoffset;
4811       if (text_view->top_window)
4812         *buffer_y -= text_view->top_window->allocation.height;
4813     }
4814 }
4815
4816 static void
4817 text_window_to_widget (GtkTextWindow *win,
4818                        gint           window_x,
4819                        gint           window_y,
4820                        gint          *widget_x,
4821                        gint          *widget_y)
4822 {
4823   if (widget_x)
4824     *widget_x = window_x + win->allocation.x;
4825
4826   if (widget_y)
4827     *widget_y = window_y + win->allocation.y;
4828 }
4829
4830 static void
4831 text_window_to_buffer (GtkTextView   *text_view,
4832                        GtkTextWindow *win,
4833                        gint           window_x,
4834                        gint           window_y,
4835                        gint          *buffer_x,
4836                        gint          *buffer_y)
4837 {
4838   if (win == NULL)
4839     {
4840       g_warning ("Attempt to convert GtkTextView buffer coordinates into "
4841                  "coordinates for a nonexistent child window.");
4842       return;
4843     }
4844
4845   text_window_to_widget (win,
4846                          window_x,
4847                          window_y,
4848                          buffer_x,
4849                          buffer_y);
4850
4851   widget_to_buffer (text_view,
4852                     buffer_x ? *buffer_x : 0,
4853                     buffer_y ? *buffer_y : 0,
4854                     buffer_x,
4855                     buffer_y);
4856 }
4857
4858 /**
4859  * gtk_text_view_window_to_buffer_coords:
4860  * @text_view: a #GtkTextView
4861  * @win: a #GtkTextWindowType
4862  * @window_x: window x coordinate
4863  * @window_y: window y coordinate
4864  * @buffer_x: buffer x coordinate return location
4865  * @buffer_y: buffer y coordinate return location
4866  *
4867  * Converts coordinates on the window identified by @win to buffer
4868  * coordinates, storing the result in (@buffer_x,@buffer_y).
4869  **/
4870 void
4871 gtk_text_view_window_to_buffer_coords (GtkTextView      *text_view,
4872                                        GtkTextWindowType win,
4873                                        gint              window_x,
4874                                        gint              window_y,
4875                                        gint             *buffer_x,
4876                                        gint             *buffer_y)
4877 {
4878   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
4879
4880   switch (win)
4881     {
4882     case GTK_TEXT_WINDOW_WIDGET:
4883       widget_to_buffer (text_view,
4884                         window_x, window_y,
4885                         buffer_x, buffer_y);
4886       break;
4887
4888     case GTK_TEXT_WINDOW_TEXT:
4889       if (buffer_x)
4890         *buffer_x = window_x + text_view->xoffset;
4891       if (buffer_y)
4892         *buffer_y = window_y + text_view->yoffset;
4893       break;
4894
4895     case GTK_TEXT_WINDOW_LEFT:
4896       text_window_to_buffer (text_view,
4897                              text_view->left_window,
4898                              window_x, window_y,
4899                              buffer_x, buffer_y);
4900       break;
4901
4902     case GTK_TEXT_WINDOW_RIGHT:
4903       text_window_to_buffer (text_view,
4904                              text_view->right_window,
4905                              window_x, window_y,
4906                              buffer_x, buffer_y);
4907       break;
4908
4909     case GTK_TEXT_WINDOW_TOP:
4910       text_window_to_buffer (text_view,
4911                              text_view->top_window,
4912                              window_x, window_y,
4913                              buffer_x, buffer_y);
4914       break;
4915
4916     case GTK_TEXT_WINDOW_BOTTOM:
4917       text_window_to_buffer (text_view,
4918                              text_view->bottom_window,
4919                              window_x, window_y,
4920                              buffer_x, buffer_y);
4921       break;
4922
4923     case GTK_TEXT_WINDOW_PRIVATE:
4924       g_warning ("%s: can't get coords for private windows", G_STRLOC);
4925       break;
4926
4927     default:
4928       g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
4929       break;
4930     }
4931 }
4932
4933 static void
4934 set_window_width (GtkTextView      *text_view,
4935                   gint              width,
4936                   GtkTextWindowType type,
4937                   GtkTextWindow   **winp)
4938 {
4939   if (width == 0)
4940     {
4941       if (*winp)
4942         {
4943           text_window_free (*winp);
4944           *winp = NULL;
4945           gtk_widget_queue_resize (GTK_WIDGET (text_view));
4946         }
4947     }
4948   else
4949     {
4950       if (*winp == NULL)
4951         {
4952           *winp = text_window_new (type,
4953                                    GTK_WIDGET (text_view),
4954                                    width, 0);
4955         }
4956       else
4957         {
4958           if ((*winp)->requisition.width == width)
4959             return;
4960         }
4961
4962       gtk_widget_queue_resize (GTK_WIDGET (text_view));
4963     }
4964 }
4965
4966
4967 static void
4968 set_window_height (GtkTextView      *text_view,
4969                    gint              height,
4970                    GtkTextWindowType type,
4971                    GtkTextWindow   **winp)
4972 {
4973   if (height == 0)
4974     {
4975       if (*winp)
4976         {
4977           text_window_free (*winp);
4978           *winp = NULL;
4979           gtk_widget_queue_resize (GTK_WIDGET (text_view));
4980         }
4981     }
4982   else
4983     {
4984       if (*winp == NULL)
4985         {
4986           *winp = text_window_new (type,
4987                                    GTK_WIDGET (text_view),
4988                                    0, height);
4989         }
4990       else
4991         {
4992           if ((*winp)->requisition.height == height)
4993             return;
4994         }
4995
4996       gtk_widget_queue_resize (GTK_WIDGET (text_view));
4997     }
4998 }
4999
5000 /**
5001  * gtk_text_view_set_border_window_size:
5002  * @text_view: a #GtkTextView
5003  * @type: window to affect
5004  * @size: width or height of the window
5005  *
5006  * Sets the width of %GTK_TEXT_WINDOW_LEFT or %GTK_TEXT_WINDOW_RIGHT,
5007  * or the height of %GTK_TEXT_WINDOW_TOP or %GTK_TEXT_WINDOW_BOTTOM.
5008  * Automatically destroys the corresponding window if the size is set to 0,
5009  * and creates the window if the size is set to non-zero.
5010  **/
5011 void
5012 gtk_text_view_set_border_window_size (GtkTextView      *text_view,
5013                                       GtkTextWindowType type,
5014                                       gint              size)
5015
5016 {
5017   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
5018   g_return_if_fail (size >= 0);
5019   g_return_if_fail (type != GTK_TEXT_WINDOW_WIDGET);
5020   g_return_if_fail (type != GTK_TEXT_WINDOW_TEXT);
5021
5022   switch (type)
5023     {
5024     case GTK_TEXT_WINDOW_LEFT:
5025       set_window_width (text_view, size, GTK_TEXT_WINDOW_LEFT,
5026                         &text_view->left_window);
5027       break;
5028
5029     case GTK_TEXT_WINDOW_RIGHT:
5030       set_window_width (text_view, size, GTK_TEXT_WINDOW_RIGHT,
5031                         &text_view->right_window);
5032       break;
5033
5034     case GTK_TEXT_WINDOW_TOP:
5035       set_window_height (text_view, size, GTK_TEXT_WINDOW_TOP,
5036                          &text_view->top_window);
5037       break;
5038
5039     case GTK_TEXT_WINDOW_BOTTOM:
5040       set_window_height (text_view, size, GTK_TEXT_WINDOW_BOTTOM,
5041                          &text_view->bottom_window);
5042       break;
5043
5044     default:
5045       g_warning ("Can't set size of center or widget or private GtkTextWindowType in %s", G_STRLOC);
5046       break;
5047     }
5048 }
5049
5050 /**
5051  * gtk_text_view_set_text_window_size:
5052  * @text_view: a #GtkTextView
5053  * @width: a width in pixels
5054  * @height: a height in pixels
5055  *
5056  * Sets the size request for the main text window (%GTK_TEXT_WINDOW_TEXT).
5057  * If the widget gets more space than it requested, the main text window
5058  * will be larger than this.
5059  *
5060  **/
5061 void
5062 gtk_text_view_set_text_window_size (GtkTextView *text_view,
5063                                     gint         width,
5064                                     gint         height)
5065 {
5066   GtkTextWindow *win;
5067
5068   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
5069   g_return_if_fail (width > 0);
5070   g_return_if_fail (height > 0);
5071
5072   win = text_view->text_window;
5073
5074   if (win->requisition.width == width &&
5075       win->requisition.height == height)
5076     return;
5077
5078   win->requisition.width = width;
5079   win->requisition.height = height;
5080
5081   gtk_widget_queue_resize (GTK_WIDGET (text_view));
5082 }
5083
5084 /*
5085  * Child widgets
5086  */
5087
5088 static GtkTextViewChild*
5089 text_view_child_new_anchored (GtkWidget          *child,
5090                               GtkTextChildAnchor *anchor,
5091                               GtkTextLayout      *layout)
5092 {
5093   GtkTextViewChild *vc;
5094
5095   vc = g_new (GtkTextViewChild, 1);
5096
5097   vc->widget = child;
5098   vc->anchor = anchor;
5099
5100   g_object_ref (G_OBJECT (vc->widget));
5101   g_object_ref (G_OBJECT (vc->anchor));
5102
5103   gtk_object_set_data (GTK_OBJECT (child),
5104                        "gtk-text-view-child",
5105                        vc);
5106
5107   gtk_text_child_anchor_register_child (anchor, child, layout);
5108
5109   return vc;
5110 }
5111
5112 static GtkTextViewChild*
5113 text_view_child_new_window (GtkWidget          *child,
5114                             GtkTextWindowType   type,
5115                             gint                x,
5116                             gint                y)
5117 {
5118   GtkTextViewChild *vc;
5119
5120   vc = g_new (GtkTextViewChild, 1);
5121
5122   vc->widget = child;
5123   vc->anchor = NULL;
5124
5125   g_object_ref (G_OBJECT (vc->widget));
5126
5127   vc->type = type;
5128   vc->x = x;
5129   vc->y = y;
5130
5131   return vc;
5132 }
5133
5134 static void
5135 text_view_child_free (GtkTextViewChild *child)
5136 {
5137
5138   gtk_object_remove_data (GTK_OBJECT (child->widget),
5139                           "gtk-text-view-child");
5140
5141   if (child->anchor)
5142     {
5143       gtk_text_child_anchor_unregister_child (child->anchor,
5144                                               child->widget);
5145       g_object_unref (G_OBJECT (child->anchor));
5146     }
5147
5148   g_object_unref (G_OBJECT (child->widget));
5149
5150   g_free (child);
5151 }
5152
5153 static void
5154 text_view_child_realize (GtkTextView      *text_view,
5155                          GtkTextViewChild *vc)
5156 {
5157   if (vc->anchor)
5158     gtk_widget_set_parent_window (vc->widget,
5159                                   text_view->text_window->bin_window);
5160   else
5161     {
5162       GdkWindow *window;
5163       window = gtk_text_view_get_window (text_view,
5164                                          vc->type);
5165       gtk_widget_set_parent_window (vc->widget, window);
5166     }
5167
5168   gtk_widget_realize (vc->widget);
5169 }
5170
5171 static void
5172 add_child (GtkTextView      *text_view,
5173            GtkTextViewChild *vc)
5174 {
5175   text_view->children = g_slist_prepend (text_view->children,
5176                                          vc);
5177
5178   gtk_widget_set_parent (vc->widget, GTK_WIDGET (text_view));
5179
5180   if (GTK_WIDGET_REALIZED (text_view))
5181     text_view_child_realize (text_view, vc);
5182
5183   if (GTK_WIDGET_VISIBLE (text_view) && GTK_WIDGET_VISIBLE (vc->widget))
5184     {
5185       if (GTK_WIDGET_MAPPED (text_view))
5186         gtk_widget_map (vc->widget);
5187
5188       gtk_widget_queue_resize (vc->widget);
5189     }
5190 }
5191
5192 void
5193 gtk_text_view_add_child_at_anchor (GtkTextView          *text_view,
5194                                    GtkWidget            *child,
5195                                    GtkTextChildAnchor   *anchor)
5196 {
5197   GtkTextViewChild *vc;
5198
5199   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
5200   g_return_if_fail (GTK_IS_WIDGET (child));
5201   g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
5202   g_return_if_fail (child->parent == NULL);
5203
5204   gtk_text_view_ensure_layout (text_view);
5205
5206   vc = text_view_child_new_anchored (child, anchor,
5207                                      text_view->layout);
5208
5209   add_child (text_view, vc);
5210 }
5211
5212 void
5213 gtk_text_view_add_child_in_window (GtkTextView          *text_view,
5214                                    GtkWidget            *child,
5215                                    GtkTextWindowType     which_window,
5216                                    gint                  xpos,
5217                                    gint                  ypos)
5218 {
5219   GtkTextViewChild *vc;
5220
5221   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
5222   g_return_if_fail (GTK_IS_WIDGET (child));
5223   g_return_if_fail (xpos >= 0);
5224   g_return_if_fail (ypos >= 0);
5225   g_return_if_fail (child->parent == NULL);
5226
5227   vc = text_view_child_new_window (child, which_window,
5228                                    xpos, ypos);
5229
5230   add_child (text_view, vc);
5231 }
5232
5233 void
5234 gtk_text_view_move_child          (GtkTextView          *text_view,
5235                                    GtkWidget            *child,
5236                                    gint                  xpos,
5237                                    gint                  ypos)
5238 {
5239   GtkTextViewChild *vc;
5240
5241   g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
5242   g_return_if_fail (GTK_IS_WIDGET (child));
5243   g_return_if_fail (xpos >= 0);
5244   g_return_if_fail (ypos >= 0);
5245   g_return_if_fail (child->parent == (GtkWidget*) text_view);
5246
5247   vc = gtk_object_get_data (GTK_OBJECT (child),
5248                             "gtk-text-view-child");
5249
5250   g_assert (vc != NULL);
5251
5252   vc->x = xpos;
5253   vc->y = ypos;
5254
5255   if (GTK_WIDGET_VISIBLE (child) && GTK_WIDGET_VISIBLE (text_view))
5256     gtk_widget_queue_resize (child);
5257 }
5258
5259