1 /* GTK - The GIMP Toolkit
2 * gtktextlayout.c - calculate the layout of the text
4 * Copyright (c) 1992-1994 The Regents of the University of California.
5 * Copyright (c) 1994-1997 Sun Microsystems, Inc.
6 * Copyright (c) 2000 Red Hat, Inc.
7 * Tk->Gtk port by Havoc Pennington
8 * Pango support by Owen Taylor
10 * This file can be used under your choice of two licenses, the LGPL
11 * and the original Tk license.
15 * This library is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU Lesser General Public
17 * License as published by the Free Software Foundation; either
18 * version 2 of the License, or (at your option) any later version.
20 * This library is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23 * Lesser General Public License for more details.
25 * You should have received a copy of the GNU Lesser General Public
26 * License along with this library; if not, write to the Free
27 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 * Original Tk license:
31 * This software is copyrighted by the Regents of the University of
32 * California, Sun Microsystems, Inc., and other parties. The
33 * following terms apply to all files associated with the software
34 * unless explicitly disclaimed in individual files.
36 * The authors hereby grant permission to use, copy, modify,
37 * distribute, and license this software and its documentation for any
38 * purpose, provided that existing copyright notices are retained in
39 * all copies and that this notice is included verbatim in any
40 * distributions. No written agreement, license, or royalty fee is
41 * required for any of the authorized uses. Modifications to this
42 * software may be copyrighted by their authors and need not follow
43 * the licensing terms described here, provided that the new terms are
44 * clearly indicated on the first page of each file where they apply.
46 * IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY
47 * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
48 * DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION,
49 * OR ANY DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
53 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
54 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
55 * NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS,
56 * AND THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
57 * MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
59 * GOVERNMENT USE: If you are acquiring this software on behalf of the
60 * U.S. government, the Government shall have only "Restricted Rights"
61 * in the software and related documentation as defined in the Federal
62 * Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2). If you
63 * are acquiring the software on behalf of the Department of Defense,
64 * the software shall be classified as "Commercial Computer Software"
65 * and the Government shall have only "Restricted Rights" as defined
66 * in Clause 252.227-7013 (c) (1) of DFARs. Notwithstanding the
67 * foregoing, the authors grant the U.S. Government and others acting
68 * in its behalf permission to use and distribute the software in
69 * accordance with the terms specified in this license.
73 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
74 * file for a list of people on the GTK+ Team. See the ChangeLog
75 * files for a list of changes. These files are distributed with
76 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
79 #define GTK_TEXT_USE_INTERNAL_UNSUPPORTED_API
81 #include "gtkmarshalers.h"
82 #include "gtktextlayout.h"
83 #include "gtktextbtree.h"
84 #include "gtktextiterprivate.h"
85 #include "gtktextutil.h"
91 #define GTK_TEXT_LAYOUT_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GTK_TYPE_TEXT_LAYOUT, GtkTextLayoutPrivate))
93 typedef struct _GtkTextLayoutPrivate GtkTextLayoutPrivate;
95 struct _GtkTextLayoutPrivate
97 /* Cache the line that the cursor is positioned on, as the keyboard
98 direction only influences the direction of the cursor line.
100 GtkTextLine *cursor_line;
103 static GtkTextLineData *gtk_text_layout_real_wrap (GtkTextLayout *layout,
106 GtkTextLineData *line_data);
108 static void gtk_text_layout_invalidated (GtkTextLayout *layout);
110 static void gtk_text_layout_real_invalidate (GtkTextLayout *layout,
111 const GtkTextIter *start,
112 const GtkTextIter *end);
113 static void gtk_text_layout_real_invalidate_cursors(GtkTextLayout *layout,
114 const GtkTextIter *start,
115 const GtkTextIter *end);
116 static void gtk_text_layout_invalidate_cache (GtkTextLayout *layout,
118 gboolean cursors_only);
119 static void gtk_text_layout_invalidate_cursor_line (GtkTextLayout *layout,
120 gboolean cursors_only);
121 static void gtk_text_layout_real_free_line_data (GtkTextLayout *layout,
123 GtkTextLineData *line_data);
124 static void gtk_text_layout_emit_changed (GtkTextLayout *layout,
129 static void gtk_text_layout_invalidate_all (GtkTextLayout *layout);
131 static PangoAttribute *gtk_text_attr_appearance_new (const GtkTextAppearance *appearance);
133 static void gtk_text_layout_mark_set_handler (GtkTextBuffer *buffer,
134 const GtkTextIter *location,
137 static void gtk_text_layout_buffer_insert_text (GtkTextBuffer *textbuffer,
142 static void gtk_text_layout_buffer_delete_range (GtkTextBuffer *textbuffer,
147 static void gtk_text_layout_update_cursor_line (GtkTextLayout *layout);
149 static void line_display_index_to_iter (GtkTextLayout *layout,
150 GtkTextLineDisplay *display,
155 static gint line_display_iter_to_index (GtkTextLayout *layout,
156 GtkTextLineDisplay *display,
157 const GtkTextIter *iter);
171 #define PIXEL_BOUND(d) (((d) + PANGO_SCALE - 1) / PANGO_SCALE)
173 static void gtk_text_layout_finalize (GObject *object);
175 static guint signals[LAST_SIGNAL] = { 0 };
177 PangoAttrType gtk_text_attr_appearance_type = 0;
179 G_DEFINE_TYPE (GtkTextLayout, gtk_text_layout, G_TYPE_OBJECT)
182 gtk_text_layout_class_init (GtkTextLayoutClass *klass)
184 GObjectClass *object_class = G_OBJECT_CLASS (klass);
186 object_class->finalize = gtk_text_layout_finalize;
188 klass->wrap = gtk_text_layout_real_wrap;
189 klass->invalidate = gtk_text_layout_real_invalidate;
190 klass->invalidate_cursors = gtk_text_layout_real_invalidate_cursors;
191 klass->free_line_data = gtk_text_layout_real_free_line_data;
193 signals[INVALIDATED] =
194 g_signal_new (I_("invalidated"),
195 G_OBJECT_CLASS_TYPE (object_class),
197 G_STRUCT_OFFSET (GtkTextLayoutClass, invalidated),
199 _gtk_marshal_VOID__VOID,
204 g_signal_new (I_("changed"),
205 G_OBJECT_CLASS_TYPE (object_class),
207 G_STRUCT_OFFSET (GtkTextLayoutClass, changed),
209 _gtk_marshal_VOID__INT_INT_INT,
216 signals[ALLOCATE_CHILD] =
217 g_signal_new (I_("allocate-child"),
218 G_OBJECT_CLASS_TYPE (object_class),
220 G_STRUCT_OFFSET (GtkTextLayoutClass, allocate_child),
222 _gtk_marshal_VOID__OBJECT_INT_INT,
229 g_type_class_add_private (object_class, sizeof (GtkTextLayoutPrivate));
233 gtk_text_layout_init (GtkTextLayout *text_layout)
235 text_layout->cursor_visible = TRUE;
239 gtk_text_layout_new (void)
241 return g_object_new (GTK_TYPE_TEXT_LAYOUT, NULL);
245 free_style_cache (GtkTextLayout *text_layout)
247 if (text_layout->one_style_cache)
249 gtk_text_attributes_unref (text_layout->one_style_cache);
250 text_layout->one_style_cache = NULL;
255 gtk_text_layout_finalize (GObject *object)
257 GtkTextLayout *layout;
259 layout = GTK_TEXT_LAYOUT (object);
261 gtk_text_layout_set_buffer (layout, NULL);
263 if (layout->default_style)
264 gtk_text_attributes_unref (layout->default_style);
265 layout->default_style = NULL;
267 if (layout->ltr_context)
269 g_object_unref (layout->ltr_context);
270 layout->ltr_context = NULL;
272 if (layout->rtl_context)
274 g_object_unref (layout->rtl_context);
275 layout->rtl_context = NULL;
278 if (layout->one_display_cache)
280 GtkTextLineDisplay *tmp_display = layout->one_display_cache;
281 layout->one_display_cache = NULL;
282 gtk_text_layout_free_line_display (layout, tmp_display);
285 if (layout->preedit_string)
287 g_free (layout->preedit_string);
288 layout->preedit_string = NULL;
291 if (layout->preedit_attrs)
293 pango_attr_list_unref (layout->preedit_attrs);
294 layout->preedit_attrs = NULL;
298 G_OBJECT_CLASS (gtk_text_layout_parent_class)->finalize (object);
302 * gtk_text_layout_set_buffer:
303 * @buffer: (allow-none):
306 gtk_text_layout_set_buffer (GtkTextLayout *layout,
307 GtkTextBuffer *buffer)
309 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
310 g_return_if_fail (buffer == NULL || GTK_IS_TEXT_BUFFER (buffer));
312 if (layout->buffer == buffer)
315 free_style_cache (layout);
319 _gtk_text_btree_remove_view (_gtk_text_buffer_get_btree (layout->buffer),
322 g_signal_handlers_disconnect_by_func (layout->buffer,
323 G_CALLBACK (gtk_text_layout_mark_set_handler),
325 g_signal_handlers_disconnect_by_func (layout->buffer,
326 G_CALLBACK (gtk_text_layout_buffer_insert_text),
328 g_signal_handlers_disconnect_by_func (layout->buffer,
329 G_CALLBACK (gtk_text_layout_buffer_delete_range),
332 g_object_unref (layout->buffer);
333 layout->buffer = NULL;
338 layout->buffer = buffer;
340 g_object_ref (buffer);
342 _gtk_text_btree_add_view (_gtk_text_buffer_get_btree (buffer), layout);
344 /* Bind to all signals that move the insert mark. */
345 g_signal_connect_after (layout->buffer, "mark-set",
346 G_CALLBACK (gtk_text_layout_mark_set_handler), layout);
347 g_signal_connect_after (layout->buffer, "insert-text",
348 G_CALLBACK (gtk_text_layout_buffer_insert_text), layout);
349 g_signal_connect_after (layout->buffer, "delete-range",
350 G_CALLBACK (gtk_text_layout_buffer_delete_range), layout);
352 gtk_text_layout_update_cursor_line (layout);
357 gtk_text_layout_default_style_changed (GtkTextLayout *layout)
359 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
361 DV (g_print ("invalidating all due to default style change (%s)\n", G_STRLOC));
362 gtk_text_layout_invalidate_all (layout);
366 gtk_text_layout_set_default_style (GtkTextLayout *layout,
367 GtkTextAttributes *values)
369 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
370 g_return_if_fail (values != NULL);
372 if (values == layout->default_style)
375 gtk_text_attributes_ref (values);
377 if (layout->default_style)
378 gtk_text_attributes_unref (layout->default_style);
380 layout->default_style = values;
382 gtk_text_layout_default_style_changed (layout);
386 gtk_text_layout_set_contexts (GtkTextLayout *layout,
387 PangoContext *ltr_context,
388 PangoContext *rtl_context)
390 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
392 if (layout->ltr_context != ltr_context)
394 if (layout->ltr_context)
395 g_object_unref (layout->ltr_context);
397 layout->ltr_context = ltr_context;
398 g_object_ref (layout->ltr_context);
401 if (layout->rtl_context != rtl_context)
403 if (layout->rtl_context)
404 g_object_unref (layout->rtl_context);
406 layout->rtl_context = rtl_context;
407 g_object_ref (layout->rtl_context);
410 DV (g_print ("invalidating all due to new pango contexts (%s)\n", G_STRLOC));
411 gtk_text_layout_invalidate_all (layout);
415 * gtk_text_layout_set_overwrite_mode:
416 * @layout: a #GtkTextLayout
417 * @overwrite: overwrite mode
419 * Sets overwrite mode
422 gtk_text_layout_set_overwrite_mode (GtkTextLayout *layout,
425 overwrite = overwrite != 0;
426 if (overwrite != layout->overwrite_mode)
428 layout->overwrite_mode = overwrite;
429 gtk_text_layout_invalidate_cursor_line (layout, TRUE);
434 * gtk_text_layout_set_cursor_direction:
435 * @direction: the new direction(s) for which to draw cursors.
436 * %GTK_TEXT_DIR_NONE means draw cursors for both
437 * left-to-right insertion and right-to-left insertion.
438 * (The two cursors will be visually distinguished.)
440 * Sets which text directions (left-to-right and/or right-to-left) for
441 * which cursors will be drawn for the insertion point. The visual
442 * point at which new text is inserted depends on whether the new
443 * text is right-to-left or left-to-right, so it may be desired to
444 * make the drawn position of the cursor depend on the keyboard state.
447 gtk_text_layout_set_cursor_direction (GtkTextLayout *layout,
448 GtkTextDirection direction)
450 if (direction != layout->cursor_direction)
452 layout->cursor_direction = direction;
453 gtk_text_layout_invalidate_cursor_line (layout, TRUE);
458 * gtk_text_layout_set_keyboard_direction:
459 * @keyboard_dir: the current direction of the keyboard.
461 * Sets the keyboard direction; this is used as for the bidirectional
462 * base direction for the line with the cursor if the line contains
463 * only neutral characters.
466 gtk_text_layout_set_keyboard_direction (GtkTextLayout *layout,
467 GtkTextDirection keyboard_dir)
469 if (keyboard_dir != layout->keyboard_direction)
471 layout->keyboard_direction = keyboard_dir;
472 gtk_text_layout_invalidate_cursor_line (layout, TRUE);
477 * gtk_text_layout_get_buffer:
478 * @layout: a #GtkTextLayout
480 * Gets the text buffer used by the layout. See
481 * gtk_text_layout_set_buffer().
483 * Return value: the text buffer used by the layout.
486 gtk_text_layout_get_buffer (GtkTextLayout *layout)
488 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), NULL);
490 return layout->buffer;
494 gtk_text_layout_set_screen_width (GtkTextLayout *layout, gint width)
496 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
497 g_return_if_fail (width >= 0);
498 g_return_if_fail (layout->wrap_loop_count == 0);
500 if (layout->screen_width == width)
503 layout->screen_width = width;
505 DV (g_print ("invalidating all due to new screen width (%s)\n", G_STRLOC));
506 gtk_text_layout_invalidate_all (layout);
510 * gtk_text_layout_set_cursor_visible:
511 * @layout: a #GtkTextLayout
512 * @cursor_visible: If %FALSE, then the insertion cursor will not
513 * be shown, even if the text is editable.
515 * Sets whether the insertion cursor should be shown. Generally,
516 * widgets using #GtkTextLayout will hide the cursor when the
517 * widget does not have the input focus.
520 gtk_text_layout_set_cursor_visible (GtkTextLayout *layout,
521 gboolean cursor_visible)
523 cursor_visible = (cursor_visible != FALSE);
525 if (layout->cursor_visible != cursor_visible)
530 layout->cursor_visible = cursor_visible;
532 /* Now queue a redraw on the paragraph containing the cursor
534 gtk_text_buffer_get_iter_at_mark (layout->buffer, &iter,
535 gtk_text_buffer_get_insert (layout->buffer));
537 gtk_text_layout_get_line_yrange (layout, &iter, &y, &height);
538 gtk_text_layout_emit_changed (layout, y, height, height);
540 gtk_text_layout_invalidate_cache (layout, _gtk_text_iter_get_text_line (&iter), TRUE);
545 * gtk_text_layout_get_cursor_visible:
546 * @layout: a #GtkTextLayout
548 * Returns whether the insertion cursor will be shown.
550 * Return value: if %FALSE, the insertion cursor will not be
551 * shown, even if the text is editable.
554 gtk_text_layout_get_cursor_visible (GtkTextLayout *layout)
556 return layout->cursor_visible;
560 * gtk_text_layout_set_preedit_string:
561 * @layout: a #PangoLayout
562 * @preedit_string: a string to display at the insertion point
563 * @preedit_attrs: a #PangoAttrList of attributes that apply to @preedit_string
564 * @cursor_pos: position of cursor within preedit string in chars
566 * Set the preedit string and attributes. The preedit string is a
567 * string showing text that is currently being edited and not
568 * yet committed into the buffer.
571 gtk_text_layout_set_preedit_string (GtkTextLayout *layout,
572 const gchar *preedit_string,
573 PangoAttrList *preedit_attrs,
576 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
577 g_return_if_fail (preedit_attrs != NULL || preedit_string == NULL);
579 g_free (layout->preedit_string);
581 if (layout->preedit_attrs)
582 pango_attr_list_unref (layout->preedit_attrs);
586 layout->preedit_string = g_strdup (preedit_string);
587 layout->preedit_len = strlen (layout->preedit_string);
588 pango_attr_list_ref (preedit_attrs);
589 layout->preedit_attrs = preedit_attrs;
591 cursor_pos = CLAMP (cursor_pos, 0, g_utf8_strlen (layout->preedit_string, -1));
592 layout->preedit_cursor = g_utf8_offset_to_pointer (layout->preedit_string, cursor_pos) - layout->preedit_string;
596 layout->preedit_string = NULL;
597 layout->preedit_len = 0;
598 layout->preedit_attrs = NULL;
599 layout->preedit_cursor = 0;
602 gtk_text_layout_invalidate_cursor_line (layout, FALSE);
606 gtk_text_layout_get_size (GtkTextLayout *layout,
610 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
613 *width = layout->width;
616 *height = layout->height;
620 gtk_text_layout_invalidated (GtkTextLayout *layout)
622 g_signal_emit (layout, signals[INVALIDATED], 0);
626 gtk_text_layout_emit_changed (GtkTextLayout *layout,
631 g_signal_emit (layout, signals[CHANGED], 0, y, old_height, new_height);
635 text_layout_changed (GtkTextLayout *layout,
639 gboolean cursors_only)
641 /* Check if the range intersects our cached line display,
642 * and invalidate the cached line if so.
644 if (layout->one_display_cache)
646 GtkTextLine *line = layout->one_display_cache->line;
647 gint cache_y = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
649 gint cache_height = layout->one_display_cache->height;
651 if (cache_y + cache_height > y && cache_y < y + old_height)
652 gtk_text_layout_invalidate_cache (layout, line, cursors_only);
655 gtk_text_layout_emit_changed (layout, y, old_height, new_height);
659 gtk_text_layout_changed (GtkTextLayout *layout,
664 text_layout_changed (layout, y, old_height, new_height, FALSE);
668 gtk_text_layout_cursors_changed (GtkTextLayout *layout,
673 text_layout_changed (layout, y, old_height, new_height, TRUE);
677 gtk_text_layout_free_line_data (GtkTextLayout *layout,
679 GtkTextLineData *line_data)
681 GTK_TEXT_LAYOUT_GET_CLASS (layout)->free_line_data (layout, line, line_data);
685 gtk_text_layout_invalidate (GtkTextLayout *layout,
686 const GtkTextIter *start_index,
687 const GtkTextIter *end_index)
689 GTK_TEXT_LAYOUT_GET_CLASS (layout)->invalidate (layout, start_index, end_index);
693 gtk_text_layout_invalidate_cursors (GtkTextLayout *layout,
694 const GtkTextIter *start_index,
695 const GtkTextIter *end_index)
697 GTK_TEXT_LAYOUT_GET_CLASS (layout)->invalidate_cursors (layout, start_index, end_index);
701 gtk_text_layout_wrap (GtkTextLayout *layout,
704 GtkTextLineData *line_data)
706 return GTK_TEXT_LAYOUT_GET_CLASS (layout)->wrap (layout, line, line_data);
711 * gtk_text_layout_get_lines:
713 * Return value: (element-type GtkTextLine) (transfer container):
716 gtk_text_layout_get_lines (GtkTextLayout *layout,
717 /* [top_y, bottom_y) */
722 GtkTextLine *first_btree_line;
723 GtkTextLine *last_btree_line;
727 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), NULL);
728 g_return_val_if_fail (bottom_y > top_y, NULL);
733 _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
734 layout, top_y, first_line_y);
735 if (first_btree_line == NULL)
741 /* -1 since bottom_y is one past */
743 _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
744 layout, bottom_y - 1, NULL);
746 if (!last_btree_line)
748 _gtk_text_btree_get_end_iter_line (_gtk_text_buffer_get_btree (layout->buffer));
750 g_assert (last_btree_line != NULL);
752 line = first_btree_line;
755 retval = g_slist_prepend (retval, line);
757 if (line == last_btree_line)
760 line = _gtk_text_line_next_excluding_last (line);
763 retval = g_slist_reverse (retval);
769 invalidate_cached_style (GtkTextLayout *layout)
771 free_style_cache (layout);
774 /* These should be called around a loop which wraps a CONTIGUOUS bunch
775 * of display lines. If the lines aren't contiguous you can't call
779 gtk_text_layout_wrap_loop_start (GtkTextLayout *layout)
781 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
782 g_return_if_fail (layout->one_style_cache == NULL);
784 layout->wrap_loop_count += 1;
788 gtk_text_layout_wrap_loop_end (GtkTextLayout *layout)
790 g_return_if_fail (layout->wrap_loop_count > 0);
792 layout->wrap_loop_count -= 1;
794 if (layout->wrap_loop_count == 0)
796 /* We cache a some stuff if we're iterating over some lines wrapping
797 * them. This cleans it up.
799 /* Nuke our cached style */
800 invalidate_cached_style (layout);
801 g_assert (layout->one_style_cache == NULL);
806 gtk_text_layout_invalidate_all (GtkTextLayout *layout)
811 if (layout->buffer == NULL)
814 gtk_text_buffer_get_bounds (layout->buffer, &start, &end);
816 gtk_text_layout_invalidate (layout, &start, &end);
820 gtk_text_layout_invalidate_cache (GtkTextLayout *layout,
822 gboolean cursors_only)
824 if (layout->one_display_cache && line == layout->one_display_cache->line)
826 GtkTextLineDisplay *display = layout->one_display_cache;
830 if (display->cursors)
831 g_array_free (display->cursors, TRUE);
832 display->cursors = NULL;
833 display->cursors_invalid = TRUE;
834 display->has_block_cursor = FALSE;
838 layout->one_display_cache = NULL;
839 gtk_text_layout_free_line_display (layout, display);
844 /* Now invalidate the paragraph containing the cursor
847 gtk_text_layout_invalidate_cursor_line (GtkTextLayout *layout,
848 gboolean cursors_only)
850 GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout);
851 GtkTextLineData *line_data;
853 if (priv->cursor_line == NULL)
856 line_data = _gtk_text_line_get_data (priv->cursor_line, layout);
860 gtk_text_layout_invalidate_cache (layout, priv->cursor_line, TRUE);
863 gtk_text_layout_invalidate_cache (layout, priv->cursor_line, FALSE);
864 _gtk_text_line_invalidate_wrap (priv->cursor_line, line_data);
867 gtk_text_layout_invalidated (layout);
872 gtk_text_layout_update_cursor_line(GtkTextLayout *layout)
874 GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout);
877 gtk_text_buffer_get_iter_at_mark (layout->buffer, &iter,
878 gtk_text_buffer_get_insert (layout->buffer));
880 priv->cursor_line = _gtk_text_iter_get_text_line (&iter);
884 gtk_text_layout_real_invalidate (GtkTextLayout *layout,
885 const GtkTextIter *start,
886 const GtkTextIter *end)
889 GtkTextLine *last_line;
891 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
892 g_return_if_fail (layout->wrap_loop_count == 0);
894 /* Because we may be invalidating a mark, it's entirely possible
895 * that gtk_text_iter_equal (start, end) in which case we
896 * should still invalidate the line they are both on. i.e.
897 * we always invalidate the line with "start" even
898 * if there's an empty range.
902 gtk_text_view_index_spew (start_index, "invalidate start");
903 gtk_text_view_index_spew (end_index, "invalidate end");
906 last_line = _gtk_text_iter_get_text_line (end);
907 line = _gtk_text_iter_get_text_line (start);
911 GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
913 gtk_text_layout_invalidate_cache (layout, line, FALSE);
916 _gtk_text_line_invalidate_wrap (line, line_data);
918 if (line == last_line)
921 line = _gtk_text_line_next_excluding_last (line);
924 gtk_text_layout_invalidated (layout);
928 gtk_text_layout_real_invalidate_cursors (GtkTextLayout *layout,
929 const GtkTextIter *start,
930 const GtkTextIter *end)
932 /* Check if the range intersects our cached line display,
933 * and invalidate the cached line if so.
935 if (layout->one_display_cache)
937 GtkTextIter line_start, line_end;
938 GtkTextLine *line = layout->one_display_cache->line;
940 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
941 &line_start, line, 0);
942 line_end = line_start;
943 if (!gtk_text_iter_ends_line (&line_end))
944 gtk_text_iter_forward_to_line_end (&line_end);
946 if (gtk_text_iter_compare (start, end) > 0)
948 const GtkTextIter *tmp = start;
953 if (gtk_text_iter_compare (&line_start, end) <= 0 &&
954 gtk_text_iter_compare (start, &line_end) <= 0)
956 gtk_text_layout_invalidate_cache (layout, line, TRUE);
960 gtk_text_layout_invalidated (layout);
964 gtk_text_layout_real_free_line_data (GtkTextLayout *layout,
966 GtkTextLineData *line_data)
968 gtk_text_layout_invalidate_cache (layout, line, FALSE);
974 * gtk_text_layout_is_valid:
975 * @layout: a #GtkTextLayout
977 * Check if there are any invalid regions in a #GtkTextLayout's buffer
979 * Return value: %TRUE if any invalid regions were found
982 gtk_text_layout_is_valid (GtkTextLayout *layout)
984 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
986 return _gtk_text_btree_is_valid (_gtk_text_buffer_get_btree (layout->buffer),
991 update_layout_size (GtkTextLayout *layout)
993 _gtk_text_btree_get_view_size (_gtk_text_buffer_get_btree (layout->buffer),
995 &layout->width, &layout->height);
999 * gtk_text_layout_validate_yrange:
1000 * @layout: a #GtkTextLayout
1001 * @anchor: iter pointing into a line that will be used as the
1003 * @y0_: offset from the top of the line pointed to by @anchor at
1004 * which to begin validation. (The offset here is in pixels
1005 * after validation.)
1006 * @y1_: offset from the top of the line pointed to by @anchor at
1007 * which to end validation. (The offset here is in pixels
1008 * after validation.)
1010 * Ensure that a region of a #GtkTextLayout is valid. The ::changed
1011 * signal will be emitted if any lines are validated.
1014 gtk_text_layout_validate_yrange (GtkTextLayout *layout,
1015 GtkTextIter *anchor,
1020 GtkTextLine *first_line = NULL;
1021 GtkTextLine *last_line = NULL;
1023 gint delta_height = 0;
1024 gint first_line_y = 0; /* Quiet GCC */
1025 gint last_line_y = 0; /* Quiet GCC */
1027 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
1034 /* Validate backwards from the anchor line to y0
1036 line = _gtk_text_iter_get_text_line (anchor);
1037 line = _gtk_text_line_previous (line);
1039 while (line && seen < -y0)
1041 GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
1042 if (!line_data || !line_data->valid)
1044 gint old_height, new_height;
1046 old_height = line_data ? line_data->height : 0;
1048 _gtk_text_btree_validate_line (_gtk_text_buffer_get_btree (layout->buffer),
1050 line_data = _gtk_text_line_get_data (line, layout);
1052 new_height = line_data ? line_data->height : 0;
1054 delta_height += new_height - old_height;
1057 first_line_y = -seen - new_height;
1061 last_line_y = -seen;
1065 seen += line_data ? line_data->height : 0;
1066 line = _gtk_text_line_previous (line);
1069 /* Validate forwards to y1 */
1070 line = _gtk_text_iter_get_text_line (anchor);
1072 while (line && seen < y1)
1074 GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
1075 if (!line_data || !line_data->valid)
1077 gint old_height, new_height;
1079 old_height = line_data ? line_data->height : 0;
1081 _gtk_text_btree_validate_line (_gtk_text_buffer_get_btree (layout->buffer),
1083 line_data = _gtk_text_line_get_data (line, layout);
1084 new_height = line_data ? line_data->height : 0;
1086 delta_height += new_height - old_height;
1091 first_line_y = seen;
1094 last_line_y = seen + new_height;
1097 seen += line_data ? line_data->height : 0;
1098 line = _gtk_text_line_next_excluding_last (line);
1101 /* If we found and validated any invalid lines, update size and
1102 * emit the changed signal
1108 update_layout_size (layout);
1110 line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
1111 first_line, layout);
1113 gtk_text_layout_emit_changed (layout,
1115 last_line_y - first_line_y - delta_height,
1116 last_line_y - first_line_y);
1121 * gtk_text_layout_validate:
1122 * @tree: a #GtkTextLayout
1123 * @max_pixels: the maximum number of pixels to validate. (No more
1124 * than one paragraph beyond this limit will be validated)
1126 * Validate regions of a #GtkTextLayout. The ::changed signal will
1127 * be emitted for each region validated.
1130 gtk_text_layout_validate (GtkTextLayout *layout,
1133 gint y, old_height, new_height;
1135 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
1137 while (max_pixels > 0 &&
1138 _gtk_text_btree_validate (_gtk_text_buffer_get_btree (layout->buffer),
1140 &y, &old_height, &new_height))
1142 max_pixels -= new_height;
1144 update_layout_size (layout);
1145 gtk_text_layout_emit_changed (layout, y, old_height, new_height);
1149 static GtkTextLineData*
1150 gtk_text_layout_real_wrap (GtkTextLayout *layout,
1153 GtkTextLineData *line_data)
1155 GtkTextLineDisplay *display;
1157 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), NULL);
1158 g_return_val_if_fail (line != NULL, NULL);
1160 if (line_data == NULL)
1162 line_data = _gtk_text_line_data_new (layout, line);
1163 _gtk_text_line_add_data (line, line_data);
1166 display = gtk_text_layout_get_line_display (layout, line, TRUE);
1167 line_data->width = display->width;
1168 line_data->height = display->height;
1169 line_data->valid = TRUE;
1170 gtk_text_layout_free_line_display (layout, display);
1176 * Layout utility functions
1179 /* If you get the style with get_style () you need to call
1180 release_style () to free it. */
1181 static GtkTextAttributes*
1182 get_style (GtkTextLayout *layout,
1185 GtkTextAttributes *style;
1187 /* If we have the one-style cache, then it means
1188 that we haven't seen a toggle since we filled in the
1191 if (layout->one_style_cache != NULL)
1193 gtk_text_attributes_ref (layout->one_style_cache);
1194 return layout->one_style_cache;
1197 g_assert (layout->one_style_cache == NULL);
1199 /* No tags, use default style */
1200 if (tags == NULL || tags->len == 0)
1202 /* One ref for the return value, one ref for the
1203 layout->one_style_cache reference */
1204 gtk_text_attributes_ref (layout->default_style);
1205 gtk_text_attributes_ref (layout->default_style);
1206 layout->one_style_cache = layout->default_style;
1208 return layout->default_style;
1211 style = gtk_text_attributes_new ();
1213 gtk_text_attributes_copy_values (layout->default_style,
1216 _gtk_text_attributes_fill_from_tags (style,
1217 (GtkTextTag**) tags->pdata,
1220 g_assert (style->refcount == 1);
1222 /* Leave this style as the last one seen */
1223 g_assert (layout->one_style_cache == NULL);
1224 gtk_text_attributes_ref (style); /* ref held by layout->one_style_cache */
1225 layout->one_style_cache = style;
1227 /* Returning yet another refcount */
1232 release_style (GtkTextLayout *layout,
1233 GtkTextAttributes *style)
1235 g_return_if_fail (style != NULL);
1236 g_return_if_fail (style->refcount > 0);
1238 gtk_text_attributes_unref (style);
1245 /* This function tries to optimize the case where a line
1246 is completely invisible */
1248 totally_invisible_line (GtkTextLayout *layout,
1252 GtkTextLineSegment *seg;
1255 /* Check if the first char is visible, if so we are partially visible.
1256 * Note that we have to check this since we don't know the current
1257 * invisible/noninvisible toggle state; this function can use the whole btree
1260 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
1263 if (!_gtk_text_btree_char_is_invisible (iter))
1267 seg = line->segments;
1271 if (seg->byte_count > 0)
1272 bytes += seg->byte_count;
1274 /* Note that these two tests can cause us to bail out
1275 * when we shouldn't, because a higher-priority tag
1276 * may override these settings. However the important
1277 * thing is to only invisible really-invisible lines, rather
1278 * than to invisible all really-invisible lines.
1281 else if (seg->type == >k_text_toggle_on_type)
1283 invalidate_cached_style (layout);
1285 /* Bail out if an elision-unsetting tag begins */
1286 if (seg->body.toggle.info->tag->priv->invisible_set &&
1287 !seg->body.toggle.info->tag->priv->values->invisible)
1290 else if (seg->type == >k_text_toggle_off_type)
1292 invalidate_cached_style (layout);
1294 /* Bail out if an elision-setting tag ends */
1295 if (seg->body.toggle.info->tag->priv->invisible_set &&
1296 seg->body.toggle.info->tag->priv->values->invisible)
1303 if (seg != NULL) /* didn't reach line end */
1310 set_para_values (GtkTextLayout *layout,
1311 PangoDirection base_dir,
1312 GtkTextAttributes *style,
1313 GtkTextLineDisplay *display)
1315 PangoAlignment pango_align = PANGO_ALIGN_LEFT;
1316 PangoWrapMode pango_wrap = PANGO_WRAP_WORD;
1320 /* If no base direction was found, then use the style direction */
1321 case PANGO_DIRECTION_NEUTRAL :
1322 display->direction = style->direction;
1324 /* Override the base direction */
1325 if (display->direction == GTK_TEXT_DIR_RTL)
1326 base_dir = PANGO_DIRECTION_RTL;
1328 base_dir = PANGO_DIRECTION_LTR;
1331 case PANGO_DIRECTION_RTL :
1332 display->direction = GTK_TEXT_DIR_RTL;
1335 display->direction = GTK_TEXT_DIR_LTR;
1339 if (display->direction == GTK_TEXT_DIR_RTL)
1340 display->layout = pango_layout_new (layout->rtl_context);
1342 display->layout = pango_layout_new (layout->ltr_context);
1344 switch (style->justification)
1346 case GTK_JUSTIFY_LEFT:
1347 pango_align = (base_dir == PANGO_DIRECTION_LTR) ? PANGO_ALIGN_LEFT : PANGO_ALIGN_RIGHT;
1349 case GTK_JUSTIFY_RIGHT:
1350 pango_align = (base_dir == PANGO_DIRECTION_LTR) ? PANGO_ALIGN_RIGHT : PANGO_ALIGN_LEFT;
1352 case GTK_JUSTIFY_CENTER:
1353 pango_align = PANGO_ALIGN_CENTER;
1355 case GTK_JUSTIFY_FILL:
1356 pango_align = (base_dir == PANGO_DIRECTION_LTR) ? PANGO_ALIGN_LEFT : PANGO_ALIGN_RIGHT;
1357 pango_layout_set_justify (display->layout, TRUE);
1360 g_assert_not_reached ();
1364 pango_layout_set_alignment (display->layout, pango_align);
1365 pango_layout_set_spacing (display->layout,
1366 style->pixels_inside_wrap * PANGO_SCALE);
1369 pango_layout_set_tabs (display->layout, style->tabs);
1371 display->top_margin = style->pixels_above_lines;
1372 display->height = style->pixels_above_lines + style->pixels_below_lines;
1373 display->bottom_margin = style->pixels_below_lines;
1374 display->left_margin = style->left_margin;
1375 display->right_margin = style->right_margin;
1377 display->x_offset = display->left_margin;
1379 pango_layout_set_indent (display->layout,
1380 style->indent * PANGO_SCALE);
1382 switch (style->wrap_mode)
1385 pango_wrap = PANGO_WRAP_CHAR;
1388 pango_wrap = PANGO_WRAP_WORD;
1391 case GTK_WRAP_WORD_CHAR:
1392 pango_wrap = PANGO_WRAP_WORD_CHAR;
1399 if (style->wrap_mode != GTK_WRAP_NONE)
1401 int layout_width = (layout->screen_width - display->left_margin - display->right_margin);
1402 pango_layout_set_width (display->layout, layout_width * PANGO_SCALE);
1403 pango_layout_set_wrap (display->layout, pango_wrap);
1406 display->total_width = MAX (layout->screen_width, layout->width) - display->left_margin - display->right_margin;
1408 if (style->pg_bg_color)
1409 display->pg_bg_color = gdk_color_copy (style->pg_bg_color);
1411 display->pg_bg_color = NULL;
1413 if (style->pg_bg_rgba)
1414 display->pg_bg_rgba = gdk_rgba_copy (style->pg_bg_rgba);
1416 display->pg_bg_rgba = NULL;
1419 static PangoAttribute *
1420 gtk_text_attr_appearance_copy (const PangoAttribute *attr)
1422 const GtkTextAttrAppearance *appearance_attr = (const GtkTextAttrAppearance *)attr;
1424 return gtk_text_attr_appearance_new (&appearance_attr->appearance);
1428 gtk_text_attr_appearance_destroy (PangoAttribute *attr)
1430 GtkTextAttrAppearance *appearance_attr = (GtkTextAttrAppearance *)attr;
1432 if (appearance_attr->appearance.rgba[0])
1433 gdk_rgba_free (appearance_attr->appearance.rgba[0]);
1435 if (appearance_attr->appearance.rgba[1])
1436 gdk_rgba_free (appearance_attr->appearance.rgba[1]);
1438 g_slice_free (GtkTextAttrAppearance, appearance_attr);
1442 rgba_equal (const GdkRGBA *rgba1, const GdkRGBA *rgba2)
1445 return gdk_rgba_equal (rgba1, rgba2);
1454 gtk_text_attr_appearance_compare (const PangoAttribute *attr1,
1455 const PangoAttribute *attr2)
1457 const GtkTextAppearance *appearance1 = &((const GtkTextAttrAppearance *)attr1)->appearance;
1458 const GtkTextAppearance *appearance2 = &((const GtkTextAttrAppearance *)attr2)->appearance;
1460 return (rgba_equal (appearance1->rgba[0], appearance2->rgba[0]) &&
1461 rgba_equal (appearance1->rgba[1], appearance2->rgba[1]) &&
1462 appearance1->underline == appearance2->underline &&
1463 appearance1->strikethrough == appearance2->strikethrough &&
1464 appearance1->draw_bg == appearance2->draw_bg);
1468 * gtk_text_attr_appearance_new:
1471 * Create a new font description attribute. (This attribute
1472 * allows setting family, style, weight, variant, stretch,
1473 * and size simultaneously.)
1477 static PangoAttribute *
1478 gtk_text_attr_appearance_new (const GtkTextAppearance *appearance)
1480 static PangoAttrClass klass = {
1482 gtk_text_attr_appearance_copy,
1483 gtk_text_attr_appearance_destroy,
1484 gtk_text_attr_appearance_compare
1487 GtkTextAttrAppearance *result;
1490 klass.type = gtk_text_attr_appearance_type =
1491 pango_attr_type_register ("GtkTextAttrAppearance");
1493 result = g_slice_new (GtkTextAttrAppearance);
1494 result->attr.klass = &klass;
1496 result->appearance = *appearance;
1498 if (appearance->rgba[0])
1499 result->appearance.rgba[0] = gdk_rgba_copy (appearance->rgba[0]);
1501 if (appearance->rgba[1])
1502 result->appearance.rgba[1] = gdk_rgba_copy (appearance->rgba[1]);
1504 return (PangoAttribute *)result;
1508 add_generic_attrs (GtkTextLayout *layout,
1509 GtkTextAppearance *appearance,
1511 PangoAttrList *attrs,
1516 PangoAttribute *attr;
1518 if (appearance->underline != PANGO_UNDERLINE_NONE)
1520 attr = pango_attr_underline_new (appearance->underline);
1522 attr->start_index = start;
1523 attr->end_index = start + byte_count;
1525 pango_attr_list_insert (attrs, attr);
1528 if (appearance->strikethrough)
1530 attr = pango_attr_strikethrough_new (appearance->strikethrough);
1532 attr->start_index = start;
1533 attr->end_index = start + byte_count;
1535 pango_attr_list_insert (attrs, attr);
1538 if (appearance->rise != 0)
1540 attr = pango_attr_rise_new (appearance->rise);
1542 attr->start_index = start;
1543 attr->end_index = start + byte_count;
1545 pango_attr_list_insert (attrs, attr);
1550 attr = gtk_text_attr_appearance_new (appearance);
1552 attr->start_index = start;
1553 attr->end_index = start + byte_count;
1555 ((GtkTextAttrAppearance *)attr)->appearance.is_text = is_text;
1557 pango_attr_list_insert (attrs, attr);
1562 add_text_attrs (GtkTextLayout *layout,
1563 GtkTextAttributes *style,
1565 PangoAttrList *attrs,
1569 PangoAttribute *attr;
1571 attr = pango_attr_font_desc_new (style->font);
1572 attr->start_index = start;
1573 attr->end_index = start + byte_count;
1575 pango_attr_list_insert (attrs, attr);
1577 if (style->font_scale != 1.0)
1579 attr = pango_attr_scale_new (style->font_scale);
1581 attr->start_index = start;
1582 attr->end_index = start + byte_count;
1584 pango_attr_list_insert (attrs, attr);
1589 add_pixbuf_attrs (GtkTextLayout *layout,
1590 GtkTextLineDisplay *display,
1591 GtkTextAttributes *style,
1592 GtkTextLineSegment *seg,
1593 PangoAttrList *attrs,
1596 PangoAttribute *attr;
1597 PangoRectangle logical_rect;
1598 GtkTextPixbuf *pixbuf = &seg->body.pixbuf;
1601 width = gdk_pixbuf_get_width (pixbuf->pixbuf);
1602 height = gdk_pixbuf_get_height (pixbuf->pixbuf);
1605 logical_rect.y = -height * PANGO_SCALE;
1606 logical_rect.width = width * PANGO_SCALE;
1607 logical_rect.height = height * PANGO_SCALE;
1609 attr = pango_attr_shape_new_with_data (&logical_rect, &logical_rect,
1610 pixbuf->pixbuf, NULL, NULL);
1611 attr->start_index = start;
1612 attr->end_index = start + seg->byte_count;
1613 pango_attr_list_insert (attrs, attr);
1617 add_child_attrs (GtkTextLayout *layout,
1618 GtkTextLineDisplay *display,
1619 GtkTextAttributes *style,
1620 GtkTextLineSegment *seg,
1621 PangoAttrList *attrs,
1624 PangoAttribute *attr;
1625 PangoRectangle logical_rect;
1633 tmp_list = seg->body.child.widgets;
1634 while (tmp_list != NULL)
1636 GtkWidget *child = tmp_list->data;
1638 if (_gtk_anchored_child_get_layout (child) == layout)
1643 gtk_widget_get_preferred_size (child, &req, NULL);
1646 height = req.height;
1653 tmp_list = g_slist_next (tmp_list);
1656 if (tmp_list == NULL)
1658 /* If tmp_list == NULL then there is no widget at this anchor in
1659 * this display; not an error. We make up an arbitrary size
1660 * to use, just so the programmer can see the blank spot.
1661 * We also put a NULL in the shaped objects list, to keep
1662 * the correspondence between the list and the shaped chars in
1663 * the layout. A bad hack, yes.
1673 logical_rect.y = -height * PANGO_SCALE;
1674 logical_rect.width = width * PANGO_SCALE;
1675 logical_rect.height = height * PANGO_SCALE;
1677 attr = pango_attr_shape_new_with_data (&logical_rect, &logical_rect,
1678 widget, NULL, NULL);
1679 attr->start_index = start;
1680 attr->end_index = start + seg->byte_count;
1681 pango_attr_list_insert (attrs, attr);
1686 * @layout: a #GtkTextLayout
1687 * @display: a #GtkTextLineDisplay
1688 * @insert_iter: iter pointing to the cursor location
1689 * @insert_index: cursor offset in the @display's layout, it may
1690 * be different from @insert_iter's offset in case when preedit
1691 * string is present.
1692 * @pos: location to store cursor position
1693 * @cursor_at_line_end: whether cursor is at the end of line
1695 * Checks whether layout should display block cursor at given position.
1696 * For this layout must be in overwrite mode and text at @insert_iter
1700 get_block_cursor (GtkTextLayout *layout,
1701 GtkTextLineDisplay *display,
1702 const GtkTextIter *insert_iter,
1705 gboolean *cursor_at_line_end)
1707 PangoRectangle pango_pos;
1709 if (layout->overwrite_mode &&
1710 gtk_text_iter_editable (insert_iter, TRUE) &&
1711 _gtk_text_util_get_block_cursor_location (display->layout,
1714 cursor_at_line_end))
1718 pos->x = PANGO_PIXELS (pango_pos.x);
1719 pos->y = PANGO_PIXELS (pango_pos.y);
1720 pos->width = PANGO_PIXELS (pango_pos.width);
1721 pos->height = PANGO_PIXELS (pango_pos.height);
1731 add_cursor (GtkTextLayout *layout,
1732 GtkTextLineDisplay *display,
1733 GtkTextLineSegment *seg,
1736 /* Hide insertion cursor when we have a selection or the layout
1737 * user has hidden the cursor.
1739 if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
1740 seg->body.mark.obj) &&
1741 (!layout->cursor_visible ||
1742 gtk_text_buffer_get_selection_bounds (layout->buffer, NULL, NULL)))
1745 if (layout->overwrite_mode &&
1746 _gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
1747 seg->body.mark.obj))
1750 gboolean cursor_at_line_end;
1752 _gtk_text_btree_get_iter_at_mark (_gtk_text_buffer_get_btree (layout->buffer),
1753 &iter, seg->body.mark.obj);
1755 if (get_block_cursor (layout, display, &iter, start,
1756 &display->block_cursor,
1757 &cursor_at_line_end))
1759 display->has_block_cursor = TRUE;
1760 display->cursor_at_line_end = cursor_at_line_end;
1765 if (!display->cursors)
1766 display->cursors = g_array_new (FALSE, FALSE, sizeof(int));
1768 display->cursors = g_array_append_val (display->cursors, start);
1772 is_shape (PangoLayoutRun *run)
1774 GSList *tmp_list = run->item->analysis.extra_attrs;
1778 PangoAttribute *attr = tmp_list->data;
1780 if (attr->klass->type == PANGO_ATTR_SHAPE)
1783 tmp_list = tmp_list->next;
1790 allocate_child_widgets (GtkTextLayout *text_layout,
1791 GtkTextLineDisplay *display)
1793 PangoLayout *layout = display->layout;
1794 PangoLayoutIter *run_iter;
1796 run_iter = pango_layout_get_iter (layout);
1799 PangoLayoutRun *run = pango_layout_iter_get_run_readonly (run_iter);
1801 if (run && is_shape (run))
1804 GtkTextIter text_iter;
1805 GtkTextChildAnchor *anchor = NULL;
1806 GList *widgets = NULL;
1809 /* The pango iterator iterates in visual order.
1810 * We use the byte index to find the child widget.
1812 byte_index = pango_layout_iter_get_index (run_iter);
1813 line_display_index_to_iter (text_layout, display, &text_iter, byte_index, 0);
1814 anchor = gtk_text_iter_get_child_anchor (&text_iter);
1816 widgets = gtk_text_child_anchor_get_widgets (anchor);
1818 for (l = widgets; l; l = l->next)
1820 PangoRectangle extents;
1821 GtkWidget *child = l->data;
1823 if (_gtk_anchored_child_get_layout (child) == text_layout)
1826 /* We emit "allocate_child" with the x,y of
1827 * the widget with respect to the top of the line
1828 * and the left side of the buffer
1830 pango_layout_iter_get_run_extents (run_iter,
1834 g_signal_emit (text_layout,
1835 signals[ALLOCATE_CHILD],
1838 PANGO_PIXELS (extents.x) + display->x_offset,
1839 PANGO_PIXELS (extents.y) + display->top_margin);
1843 g_list_free (widgets);
1846 while (pango_layout_iter_next_run (run_iter));
1848 pango_layout_iter_free (run_iter);
1852 convert_color (GdkColor *result,
1853 PangoAttrColor *attr)
1855 result->red = attr->color.red;
1856 result->blue = attr->color.blue;
1857 result->green = attr->color.green;
1860 /* This function is used to convert the preedit string attributes, which are
1861 * standard PangoAttributes, into the custom attributes used by the text
1862 * widget and insert them into a attr list with a given offset.
1865 add_preedit_attrs (GtkTextLayout *layout,
1866 GtkTextAttributes *style,
1867 PangoAttrList *attrs,
1871 PangoAttrIterator *iter = pango_attr_list_get_iterator (layout->preedit_attrs);
1875 GtkTextAppearance appearance = style->appearance;
1876 PangoFontDescription *font_desc = pango_font_description_copy_static (style->font);
1877 PangoAttribute *insert_attr;
1878 GSList *extra_attrs = NULL;
1880 PangoLanguage *language;
1883 pango_attr_iterator_range (iter, &start, &end);
1885 if (end == G_MAXINT)
1886 end = layout->preedit_len;
1891 pango_attr_iterator_get_font (iter, font_desc, &language, &extra_attrs);
1893 tmp_list = extra_attrs;
1896 PangoAttribute *attr = tmp_list->data;
1898 switch (attr->klass->type)
1900 case PANGO_ATTR_FOREGROUND:
1901 convert_color (&appearance.fg_color, (PangoAttrColor *)attr);
1903 case PANGO_ATTR_BACKGROUND:
1904 convert_color (&appearance.bg_color, (PangoAttrColor *)attr);
1905 appearance.draw_bg = TRUE;
1907 case PANGO_ATTR_UNDERLINE:
1908 appearance.underline = ((PangoAttrInt *)attr)->value;
1910 case PANGO_ATTR_STRIKETHROUGH:
1911 appearance.strikethrough = ((PangoAttrInt *)attr)->value;
1913 case PANGO_ATTR_RISE:
1914 appearance.rise = ((PangoAttrInt *)attr)->value;
1920 pango_attribute_destroy (attr);
1921 tmp_list = tmp_list->next;
1924 g_slist_free (extra_attrs);
1926 insert_attr = pango_attr_font_desc_new (font_desc);
1927 insert_attr->start_index = start + offset;
1928 insert_attr->end_index = end + offset;
1930 pango_attr_list_insert (attrs, insert_attr);
1934 insert_attr = pango_attr_language_new (language);
1935 insert_attr->start_index = start + offset;
1936 insert_attr->end_index = end + offset;
1938 pango_attr_list_insert (attrs, insert_attr);
1941 add_generic_attrs (layout, &appearance, end - start,
1942 attrs, start + offset,
1945 pango_font_description_free (font_desc);
1947 while (pango_attr_iterator_next (iter));
1949 pango_attr_iterator_destroy (iter);
1952 /* Iterate over the line and fill in display->cursors.
1953 * It's a stripped copy of gtk_text_layout_get_line_display() */
1955 update_text_display_cursors (GtkTextLayout *layout,
1957 GtkTextLineDisplay *display)
1959 GtkTextLineSegment *seg;
1961 gint layout_byte_offset, buffer_byte_offset;
1962 GSList *cursor_byte_offsets = NULL;
1963 GSList *cursor_segs = NULL;
1964 GSList *tmp_list1, *tmp_list2;
1966 if (!display->cursors_invalid)
1969 display->cursors_invalid = FALSE;
1971 /* Special-case optimization for completely
1972 * invisible lines; makes it faster to deal
1973 * with sequences of invisible lines.
1975 if (totally_invisible_line (layout, line, &iter))
1978 /* Iterate over segments */
1979 layout_byte_offset = 0; /* position in the layout text (includes preedit, does not include invisible text) */
1980 buffer_byte_offset = 0; /* position in the buffer line */
1981 seg = _gtk_text_iter_get_any_segment (&iter);
1984 /* Displayable segments */
1985 if (seg->type == >k_text_char_type ||
1986 seg->type == >k_text_pixbuf_type ||
1987 seg->type == >k_text_child_type)
1989 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
1991 buffer_byte_offset);
1993 if (!_gtk_text_btree_char_is_invisible (&iter))
1994 layout_byte_offset += seg->byte_count;
1996 buffer_byte_offset += seg->byte_count;
2000 else if (seg->type == >k_text_right_mark_type ||
2001 seg->type == >k_text_left_mark_type)
2003 gint cursor_offset = 0;
2005 /* At the insertion point, add the preedit string, if any */
2007 if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
2008 seg->body.mark.obj))
2010 display->insert_index = layout_byte_offset;
2012 if (layout->preedit_len > 0)
2014 layout_byte_offset += layout->preedit_len;
2015 /* DO NOT increment the buffer byte offset for preedit */
2016 cursor_offset = layout->preedit_cursor - layout->preedit_len;
2020 /* Display visible marks */
2022 if (seg->body.mark.visible)
2024 cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets,
2025 GINT_TO_POINTER (layout_byte_offset + cursor_offset));
2026 cursor_segs = g_slist_prepend (cursor_segs, seg);
2031 else if (seg->type == >k_text_toggle_on_type ||
2032 seg->type == >k_text_toggle_off_type)
2037 g_error ("Unknown segment type: %s", seg->type->name);
2042 tmp_list1 = cursor_byte_offsets;
2043 tmp_list2 = cursor_segs;
2046 add_cursor (layout, display, tmp_list2->data,
2047 GPOINTER_TO_INT (tmp_list1->data));
2048 tmp_list1 = tmp_list1->next;
2049 tmp_list2 = tmp_list2->next;
2051 g_slist_free (cursor_byte_offsets);
2052 g_slist_free (cursor_segs);
2055 /* Same as _gtk_text_btree_get_tags(), except it returns GPtrArray,
2056 * to be used in gtk_text_layout_get_line_display(). */
2058 get_tags_array_at_iter (GtkTextIter *iter)
2061 GPtrArray *array = NULL;
2064 tags = _gtk_text_btree_get_tags (iter, &n_tags);
2068 array = g_ptr_array_sized_new (n_tags);
2069 g_ptr_array_set_size (array, n_tags);
2070 memcpy (array->pdata, tags, n_tags * sizeof (GtkTextTag*));
2077 /* Add the tag to the array if it's not there already, and remove
2078 * it otherwise. It keeps the array sorted by tags priority. */
2080 tags_array_toggle_tag (GPtrArray *array,
2087 array = g_ptr_array_new ();
2089 tags = (GtkTextTag**) array->pdata;
2091 for (pos = 0; pos < array->len && tags[pos]->priv->priority < tag->priv->priority; pos++) ;
2093 if (pos < array->len && tags[pos] == tag)
2094 g_ptr_array_remove_index (array, pos);
2097 g_ptr_array_set_size (array, array->len + 1);
2098 if (pos < array->len - 1)
2099 memmove (array->pdata + pos + 1, array->pdata + pos,
2100 (array->len - pos - 1) * sizeof (GtkTextTag*));
2101 array->pdata[pos] = tag;
2107 GtkTextLineDisplay *
2108 gtk_text_layout_get_line_display (GtkTextLayout *layout,
2112 GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout);
2113 GtkTextLineDisplay *display;
2114 GtkTextLineSegment *seg;
2116 GtkTextAttributes *style;
2118 PangoAttrList *attrs;
2119 gint text_allocated, layout_byte_offset, buffer_byte_offset;
2120 PangoRectangle extents;
2121 gboolean para_values_set = FALSE;
2122 GSList *cursor_byte_offsets = NULL;
2123 GSList *cursor_segs = NULL;
2124 GSList *tmp_list1, *tmp_list2;
2125 gboolean saw_widget = FALSE;
2126 PangoDirection base_dir;
2128 gboolean initial_toggle_segments;
2130 g_return_val_if_fail (line != NULL, NULL);
2132 if (layout->one_display_cache)
2134 if (line == layout->one_display_cache->line &&
2135 (size_only || !layout->one_display_cache->size_only))
2138 update_text_display_cursors (layout, line, layout->one_display_cache);
2139 return layout->one_display_cache;
2143 GtkTextLineDisplay *tmp_display = layout->one_display_cache;
2144 layout->one_display_cache = NULL;
2145 gtk_text_layout_free_line_display (layout, tmp_display);
2149 DV (g_print ("creating one line display cache (%s)\n", G_STRLOC));
2151 display = g_new0 (GtkTextLineDisplay, 1);
2153 display->size_only = size_only;
2154 display->line = line;
2155 display->insert_index = -1;
2157 /* Special-case optimization for completely
2158 * invisible lines; makes it faster to deal
2159 * with sequences of invisible lines.
2161 if (totally_invisible_line (layout, line, &iter))
2163 if (display->direction == GTK_TEXT_DIR_RTL)
2164 display->layout = pango_layout_new (layout->rtl_context);
2166 display->layout = pango_layout_new (layout->ltr_context);
2171 /* Find the bidi base direction */
2172 base_dir = line->dir_propagated_forward;
2173 if (base_dir == PANGO_DIRECTION_NEUTRAL)
2174 base_dir = line->dir_propagated_back;
2176 if (line == priv->cursor_line &&
2177 line->dir_strong == PANGO_DIRECTION_NEUTRAL)
2179 base_dir = (layout->keyboard_direction == GTK_TEXT_DIR_LTR) ?
2180 PANGO_DIRECTION_LTR : PANGO_DIRECTION_RTL;
2183 /* Allocate space for flat text for buffer
2185 text_allocated = _gtk_text_line_byte_count (line);
2186 text = g_malloc (text_allocated);
2188 attrs = pango_attr_list_new ();
2190 /* Iterate over segments, creating display chunks for them, and updating the tags array. */
2191 layout_byte_offset = 0; /* current length of layout text (includes preedit, does not include invisible text) */
2192 buffer_byte_offset = 0; /* position in the buffer line */
2193 seg = _gtk_text_iter_get_any_segment (&iter);
2194 tags = get_tags_array_at_iter (&iter);
2195 initial_toggle_segments = TRUE;
2198 /* Displayable segments */
2199 if (seg->type == >k_text_char_type ||
2200 seg->type == >k_text_pixbuf_type ||
2201 seg->type == >k_text_child_type)
2203 style = get_style (layout, tags);
2204 initial_toggle_segments = FALSE;
2206 /* We have to delay setting the paragraph values until we
2207 * hit the first pixbuf or text segment because toggles at
2208 * the beginning of the paragraph should affect the
2209 * paragraph-global values
2211 if (!para_values_set)
2213 set_para_values (layout, base_dir, style, display);
2214 para_values_set = TRUE;
2217 /* First see if the chunk is invisible, and ignore it if so. Tk
2218 * looked at tabs, wrap mode, etc. before doing this, but
2219 * that made no sense to me, so I am just skipping the
2222 if (!style->invisible)
2224 if (seg->type == >k_text_char_type)
2226 /* We don't want to split segments because of marks,
2227 * so we scan forward for more segments only
2228 * separated from us by marks. In theory, we should
2229 * also merge segments with identical styles, even
2230 * if there are toggles in-between
2234 GtkTextLineSegment *prev_seg = NULL;
2238 if (seg->type == >k_text_char_type)
2240 memcpy (text + layout_byte_offset, seg->body.chars, seg->byte_count);
2241 layout_byte_offset += seg->byte_count;
2242 buffer_byte_offset += seg->byte_count;
2243 bytes += seg->byte_count;
2245 else if (seg->type == >k_text_right_mark_type ||
2246 seg->type == >k_text_left_mark_type)
2248 /* If we have preedit string, break out of this loop - we'll almost
2249 * certainly have different attributes on the preedit string
2252 if (layout->preedit_len > 0 &&
2253 _gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
2254 seg->body.mark.obj))
2257 if (seg->body.mark.visible)
2259 cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets, GINT_TO_POINTER (layout_byte_offset));
2260 cursor_segs = g_slist_prepend (cursor_segs, seg);
2261 if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
2262 seg->body.mark.obj))
2263 display->insert_index = layout_byte_offset;
2273 seg = prev_seg; /* Back up one */
2274 add_generic_attrs (layout, &style->appearance,
2276 attrs, layout_byte_offset - bytes,
2278 add_text_attrs (layout, style, bytes, attrs,
2279 layout_byte_offset - bytes, size_only);
2281 else if (seg->type == >k_text_pixbuf_type)
2283 add_generic_attrs (layout,
2286 attrs, layout_byte_offset,
2288 add_pixbuf_attrs (layout, display, style,
2289 seg, attrs, layout_byte_offset);
2290 memcpy (text + layout_byte_offset, _gtk_text_unknown_char_utf8,
2292 layout_byte_offset += seg->byte_count;
2293 buffer_byte_offset += seg->byte_count;
2295 else if (seg->type == >k_text_child_type)
2299 add_generic_attrs (layout, &style->appearance,
2301 attrs, layout_byte_offset,
2303 add_child_attrs (layout, display, style,
2304 seg, attrs, layout_byte_offset);
2305 memcpy (text + layout_byte_offset, _gtk_text_unknown_char_utf8,
2307 layout_byte_offset += seg->byte_count;
2308 buffer_byte_offset += seg->byte_count;
2312 /* We don't know this segment type */
2313 g_assert_not_reached ();
2316 } /* if (segment was visible) */
2319 /* Invisible segment */
2320 buffer_byte_offset += seg->byte_count;
2323 release_style (layout, style);
2327 else if (seg->type == >k_text_toggle_on_type ||
2328 seg->type == >k_text_toggle_off_type)
2330 /* Style may have changed, drop our
2331 current cached style */
2332 invalidate_cached_style (layout);
2333 /* Add the tag only after we have seen some non-toggle non-mark segment,
2334 * otherwise the tag is already accounted for by _gtk_text_btree_get_tags(). */
2335 if (!initial_toggle_segments)
2336 tags = tags_array_toggle_tag (tags, seg->body.toggle.info->tag);
2340 else if (seg->type == >k_text_right_mark_type ||
2341 seg->type == >k_text_left_mark_type)
2343 gint cursor_offset = 0;
2345 /* At the insertion point, add the preedit string, if any */
2347 if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
2348 seg->body.mark.obj))
2350 display->insert_index = layout_byte_offset;
2352 if (layout->preedit_len > 0)
2354 text_allocated += layout->preedit_len;
2355 text = g_realloc (text, text_allocated);
2357 style = get_style (layout, tags);
2358 add_preedit_attrs (layout, style, attrs, layout_byte_offset, size_only);
2359 release_style (layout, style);
2361 memcpy (text + layout_byte_offset, layout->preedit_string, layout->preedit_len);
2362 layout_byte_offset += layout->preedit_len;
2363 /* DO NOT increment the buffer byte offset for preedit */
2365 cursor_offset = layout->preedit_cursor - layout->preedit_len;
2370 /* Display visible marks */
2372 if (seg->body.mark.visible)
2374 cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets,
2375 GINT_TO_POINTER (layout_byte_offset + cursor_offset));
2376 cursor_segs = g_slist_prepend (cursor_segs, seg);
2381 g_error ("Unknown segment type: %s", seg->type->name);
2386 if (!para_values_set)
2388 style = get_style (layout, tags);
2389 set_para_values (layout, base_dir, style, display);
2390 release_style (layout, style);
2393 /* Pango doesn't want the trailing paragraph delimiters */
2396 /* Only one character has type G_UNICODE_PARAGRAPH_SEPARATOR in
2397 * Unicode 3.0; update this if that changes.
2399 #define PARAGRAPH_SEPARATOR 0x2029
2402 if (layout_byte_offset > 0)
2404 const char *prev = g_utf8_prev_char (text + layout_byte_offset);
2405 ch = g_utf8_get_char (prev);
2406 if (ch == PARAGRAPH_SEPARATOR || ch == '\r' || ch == '\n')
2407 layout_byte_offset = prev - text; /* chop off */
2409 if (ch == '\n' && layout_byte_offset > 0)
2411 /* Possibly chop a CR as well */
2412 prev = g_utf8_prev_char (text + layout_byte_offset);
2414 --layout_byte_offset;
2419 pango_layout_set_text (display->layout, text, layout_byte_offset);
2420 pango_layout_set_attributes (display->layout, attrs);
2422 tmp_list1 = cursor_byte_offsets;
2423 tmp_list2 = cursor_segs;
2426 add_cursor (layout, display, tmp_list2->data,
2427 GPOINTER_TO_INT (tmp_list1->data));
2428 tmp_list1 = tmp_list1->next;
2429 tmp_list2 = tmp_list2->next;
2431 g_slist_free (cursor_byte_offsets);
2432 g_slist_free (cursor_segs);
2434 pango_layout_get_extents (display->layout, NULL, &extents);
2436 display->width = PIXEL_BOUND (extents.width) + display->left_margin + display->right_margin;
2437 display->height += PANGO_PIXELS (extents.height);
2439 /* If we aren't wrapping, we need to do the alignment of each
2440 * paragraph ourselves.
2442 if (pango_layout_get_width (display->layout) < 0)
2444 gint excess = display->total_width - display->width;
2446 switch (pango_layout_get_alignment (display->layout))
2448 case PANGO_ALIGN_LEFT:
2450 case PANGO_ALIGN_CENTER:
2451 display->x_offset += excess / 2;
2453 case PANGO_ALIGN_RIGHT:
2454 display->x_offset += excess;
2459 /* Free this if we aren't in a loop */
2460 if (layout->wrap_loop_count == 0)
2461 invalidate_cached_style (layout);
2464 pango_attr_list_unref (attrs);
2466 g_ptr_array_free (tags, TRUE);
2468 layout->one_display_cache = display;
2471 allocate_child_widgets (layout, display);
2477 gtk_text_layout_free_line_display (GtkTextLayout *layout,
2478 GtkTextLineDisplay *display)
2480 if (display != layout->one_display_cache)
2482 if (display->layout)
2483 g_object_unref (display->layout);
2485 if (display->cursors)
2486 g_array_free (display->cursors, TRUE);
2488 if (display->pg_bg_color)
2489 gdk_color_free (display->pg_bg_color);
2491 if (display->pg_bg_rgba)
2492 gdk_rgba_free (display->pg_bg_rgba);
2498 /* Functions to convert iter <=> index for the line of a GtkTextLineDisplay
2499 * taking into account the preedit string and invisible text if necessary.
2502 line_display_iter_to_index (GtkTextLayout *layout,
2503 GtkTextLineDisplay *display,
2504 const GtkTextIter *iter)
2508 g_return_val_if_fail (_gtk_text_iter_get_text_line (iter) == display->line, 0);
2510 index = gtk_text_iter_get_visible_line_index (iter);
2512 if (layout->preedit_len > 0 && display->insert_index >= 0)
2514 if (index >= display->insert_index)
2515 index += layout->preedit_len;
2522 line_display_index_to_iter (GtkTextLayout *layout,
2523 GtkTextLineDisplay *display,
2528 g_return_if_fail (!_gtk_text_line_is_last (display->line,
2529 _gtk_text_buffer_get_btree (layout->buffer)));
2531 if (layout->preedit_len > 0 && display->insert_index >= 0)
2533 if (index >= display->insert_index + layout->preedit_len)
2534 index -= layout->preedit_len;
2535 else if (index > display->insert_index)
2537 index = display->insert_index;
2542 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2543 iter, display->line, 0);
2545 gtk_text_iter_set_visible_line_index (iter, index);
2547 if (_gtk_text_iter_get_text_line (iter) != display->line)
2549 /* Clamp to end of line - really this clamping should have been done
2550 * before here, maybe in Pango, this is a broken band-aid I think
2552 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2553 iter, display->line, 0);
2555 if (!gtk_text_iter_ends_line (iter))
2556 gtk_text_iter_forward_to_line_end (iter);
2559 gtk_text_iter_forward_chars (iter, trailing);
2563 get_line_at_y (GtkTextLayout *layout,
2570 if (y > layout->height)
2573 *line = _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
2574 layout, y, line_top);
2577 *line = _gtk_text_btree_get_end_iter_line (_gtk_text_buffer_get_btree (layout->buffer));
2581 _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2587 * gtk_text_layout_get_line_at_y:
2588 * @layout: a #GtkLayout
2589 * @target_iter: the iterator in which the result is stored
2590 * @y: the y positition
2591 * @line_top: location to store the y coordinate of the
2592 * top of the line. (Can by %NULL)
2594 * Get the iter at the beginning of the line which is displayed
2598 gtk_text_layout_get_line_at_y (GtkTextLayout *layout,
2599 GtkTextIter *target_iter,
2605 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2606 g_return_if_fail (target_iter != NULL);
2608 get_line_at_y (layout, y, &line, line_top);
2609 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2610 target_iter, line, 0);
2614 gtk_text_layout_get_iter_at_pixel (GtkTextLayout *layout,
2615 GtkTextIter *target_iter,
2621 gtk_text_layout_get_iter_at_position (layout, target_iter, &trailing, x, y);
2623 gtk_text_iter_forward_chars (target_iter, trailing);
2626 void gtk_text_layout_get_iter_at_position (GtkTextLayout *layout,
2627 GtkTextIter *target_iter,
2635 GtkTextLineDisplay *display;
2637 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2638 g_return_if_fail (target_iter != NULL);
2640 get_line_at_y (layout, y, &line, &line_top);
2642 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2644 x -= display->x_offset;
2645 y -= line_top + display->top_margin;
2647 /* If we are below the layout, position the cursor at the last character
2650 if (y > display->height - display->top_margin - display->bottom_margin)
2652 byte_index = _gtk_text_line_byte_count (line);
2658 /* Ignore the "outside" return value from pango. Pango is doing
2659 * the right thing even if we are outside the layout in the
2662 pango_layout_xy_to_index (display->layout, x * PANGO_SCALE, y * PANGO_SCALE,
2663 &byte_index, trailing);
2666 line_display_index_to_iter (layout, display, target_iter, byte_index, 0);
2668 gtk_text_layout_free_line_display (layout, display);
2673 * gtk_text_layout_get_cursor_locations:
2674 * @layout: a #GtkTextLayout
2675 * @iter: a #GtkTextIter
2676 * @strong_pos: (allow-none): location to store the strong cursor position (may be %NULL)
2677 * @weak_pos: (allow-none): location to store the weak cursor position (may be %NULL)
2679 * Given an iterator within a text layout, determine the positions of the
2680 * strong and weak cursors if the insertion point is at that
2681 * iterator. The position of each cursor is stored as a zero-width
2682 * rectangle. The strong cursor location is the location where
2683 * characters of the directionality equal to the base direction of the
2684 * paragraph are inserted. The weak cursor location is the location
2685 * where characters of the directionality opposite to the base
2686 * direction of the paragraph are inserted.
2689 gtk_text_layout_get_cursor_locations (GtkTextLayout *layout,
2691 GdkRectangle *strong_pos,
2692 GdkRectangle *weak_pos)
2695 GtkTextLineDisplay *display;
2698 GtkTextIter insert_iter;
2700 PangoRectangle pango_strong_pos;
2701 PangoRectangle pango_weak_pos;
2703 g_return_if_fail (layout != NULL);
2704 g_return_if_fail (iter != NULL);
2706 line = _gtk_text_iter_get_text_line (iter);
2707 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2708 index = line_display_iter_to_index (layout, display, iter);
2710 line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2713 gtk_text_buffer_get_iter_at_mark (layout->buffer, &insert_iter,
2714 gtk_text_buffer_get_insert (layout->buffer));
2716 if (gtk_text_iter_equal (iter, &insert_iter))
2717 index += layout->preedit_cursor - layout->preedit_len;
2719 pango_layout_get_cursor_pos (display->layout, index,
2720 strong_pos ? &pango_strong_pos : NULL,
2721 weak_pos ? &pango_weak_pos : NULL);
2725 strong_pos->x = display->x_offset + pango_strong_pos.x / PANGO_SCALE;
2726 strong_pos->y = line_top + display->top_margin + pango_strong_pos.y / PANGO_SCALE;
2727 strong_pos->width = 0;
2728 strong_pos->height = pango_strong_pos.height / PANGO_SCALE;
2733 weak_pos->x = display->x_offset + pango_weak_pos.x / PANGO_SCALE;
2734 weak_pos->y = line_top + display->top_margin + pango_weak_pos.y / PANGO_SCALE;
2735 weak_pos->width = 0;
2736 weak_pos->height = pango_weak_pos.height / PANGO_SCALE;
2739 gtk_text_layout_free_line_display (layout, display);
2743 * _gtk_text_layout_get_block_cursor:
2744 * @layout: a #GtkTextLayout
2745 * @pos: a #GdkRectangle to store block cursor position
2747 * If layout is to display a block cursor, calculates its position
2748 * and returns %TRUE. Otherwise it returns %FALSE. In case when
2749 * cursor is visible, it simply returns the position stored in
2750 * the line display, otherwise it has to compute the position
2751 * (see get_block_cursor()).
2754 _gtk_text_layout_get_block_cursor (GtkTextLayout *layout,
2758 GtkTextLineDisplay *display;
2761 gboolean block = FALSE;
2763 g_return_val_if_fail (layout != NULL, FALSE);
2765 gtk_text_buffer_get_iter_at_mark (layout->buffer, &iter,
2766 gtk_text_buffer_get_insert (layout->buffer));
2767 line = _gtk_text_iter_get_text_line (&iter);
2768 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2770 if (display->has_block_cursor)
2773 rect = display->block_cursor;
2777 gint index = display->insert_index;
2780 index = gtk_text_iter_get_line_index (&iter);
2782 if (get_block_cursor (layout, display, &iter, index, &rect, NULL))
2790 line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2794 pos->x += display->x_offset;
2795 pos->y += line_top + display->top_margin;
2798 gtk_text_layout_free_line_display (layout, display);
2803 * gtk_text_layout_get_line_yrange:
2804 * @layout: a #GtkTextLayout
2805 * @iter: a #GtkTextIter
2806 * @y: location to store the top of the paragraph in pixels,
2808 * @height location to store the height of the paragraph in pixels,
2811 * Find the range of y coordinates for the paragraph containing
2815 gtk_text_layout_get_line_yrange (GtkTextLayout *layout,
2816 const GtkTextIter *iter,
2822 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2823 g_return_if_fail (_gtk_text_iter_get_btree (iter) == _gtk_text_buffer_get_btree (layout->buffer));
2825 line = _gtk_text_iter_get_text_line (iter);
2828 *y = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2832 GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
2834 *height = line_data->height;
2841 * _gtk_text_layout_get_line_xrange:
2842 * @layout: a #GtkTextLayout
2843 * @iter: a #GtkTextIter
2844 * @x: location to store the top of the paragraph in pixels,
2846 * @width location to store the height of the paragraph in pixels,
2849 * Find the range of X coordinates for the paragraph containing
2850 * the given iter. Private for 2.0 due to API freeze, could
2851 * be made public for 2.2.
2854 _gtk_text_layout_get_line_xrange (GtkTextLayout *layout,
2855 const GtkTextIter *iter,
2861 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2862 g_return_if_fail (_gtk_text_iter_get_btree (iter) == _gtk_text_buffer_get_btree (layout->buffer));
2864 line = _gtk_text_iter_get_text_line (iter);
2867 *x = 0; /* FIXME This is wrong; should represent the first available cursor position */
2871 GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
2873 *width = line_data->width;
2880 gtk_text_layout_get_iter_location (GtkTextLayout *layout,
2881 const GtkTextIter *iter,
2884 PangoRectangle pango_rect;
2887 GtkTextLineDisplay *display;
2891 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2892 g_return_if_fail (_gtk_text_iter_get_btree (iter) == _gtk_text_buffer_get_btree (layout->buffer));
2893 g_return_if_fail (rect != NULL);
2895 tree = _gtk_text_iter_get_btree (iter);
2896 line = _gtk_text_iter_get_text_line (iter);
2898 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2900 rect->y = _gtk_text_btree_find_line_top (tree, line, layout);
2902 x_offset = display->x_offset * PANGO_SCALE;
2904 byte_index = gtk_text_iter_get_line_index (iter);
2906 pango_layout_index_to_pos (display->layout, byte_index, &pango_rect);
2908 rect->x = PANGO_PIXELS (x_offset + pango_rect.x);
2909 rect->y += PANGO_PIXELS (pango_rect.y) + display->top_margin;
2910 rect->width = PANGO_PIXELS (pango_rect.width);
2911 rect->height = PANGO_PIXELS (pango_rect.height);
2913 gtk_text_layout_free_line_display (layout, display);
2918 /* Find the iter for the logical beginning of the first display line whose
2919 * top y is >= y. If none exists, move the iter to the logical beginning
2920 * of the last line in the buffer.
2923 find_display_line_below (GtkTextLayout *layout,
2927 GtkTextLine *line, *next;
2928 GtkTextLine *found_line = NULL;
2930 gint found_byte = 0;
2932 line = _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
2933 layout, y, &line_top);
2937 _gtk_text_btree_get_end_iter_line (_gtk_text_buffer_get_btree (layout->buffer));
2940 _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2944 while (line && !found_line)
2946 GtkTextLineDisplay *display = gtk_text_layout_get_line_display (layout, line, FALSE);
2947 PangoLayoutIter *layout_iter;
2949 layout_iter = pango_layout_get_iter (display->layout);
2951 line_top += display->top_margin;
2955 gint first_y, last_y;
2956 PangoLayoutLine *layout_line = pango_layout_iter_get_line_readonly (layout_iter);
2958 found_byte = layout_line->start_index;
2966 pango_layout_iter_get_line_yrange (layout_iter, &first_y, &last_y);
2967 line_top += (last_y - first_y) / PANGO_SCALE;
2969 while (pango_layout_iter_next_line (layout_iter));
2971 pango_layout_iter_free (layout_iter);
2973 line_top += display->bottom_margin;
2974 gtk_text_layout_free_line_display (layout, display);
2976 next = _gtk_text_line_next_excluding_last (line);
2983 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2984 iter, found_line, found_byte);
2987 /* Find the iter for the logical beginning of the last display line whose
2988 * top y is >= y. If none exists, move the iter to the logical beginning
2989 * of the first line in the buffer.
2992 find_display_line_above (GtkTextLayout *layout,
2997 GtkTextLine *found_line = NULL;
2999 gint found_byte = 0;
3001 line = _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer), layout, y, &line_top);
3004 line = _gtk_text_btree_get_end_iter_line (_gtk_text_buffer_get_btree (layout->buffer));
3006 line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer), line, layout);
3009 while (line && !found_line)
3011 GtkTextLineDisplay *display = gtk_text_layout_get_line_display (layout, line, FALSE);
3012 PangoRectangle logical_rect;
3013 PangoLayoutIter *layout_iter;
3016 layout_iter = pango_layout_get_iter (display->layout);
3018 line_top -= display->top_margin + display->bottom_margin;
3019 pango_layout_iter_get_layout_extents (layout_iter, NULL, &logical_rect);
3020 line_top -= logical_rect.height / PANGO_SCALE;
3022 tmp_top = line_top + display->top_margin;
3026 gint first_y, last_y;
3027 PangoLayoutLine *layout_line = pango_layout_iter_get_line_readonly (layout_iter);
3029 found_byte = layout_line->start_index;
3031 pango_layout_iter_get_line_yrange (layout_iter, &first_y, &last_y);
3033 tmp_top -= (last_y - first_y) / PANGO_SCALE;
3038 pango_layout_iter_free (layout_iter);
3042 while (pango_layout_iter_next_line (layout_iter));
3044 pango_layout_iter_free (layout_iter);
3046 gtk_text_layout_free_line_display (layout, display);
3048 line = _gtk_text_line_previous (line);
3054 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
3055 iter, found_line, found_byte);
3057 gtk_text_buffer_get_iter_at_offset (layout->buffer, iter, 0);
3061 * gtk_text_layout_clamp_iter_to_vrange:
3062 * @layout: a #GtkTextLayout
3063 * @iter: a #GtkTextIter
3064 * @top: the top of the range
3065 * @bottom: the bottom the range
3067 * If the iterator is not fully in the range @top <= y < @bottom,
3068 * then, if possible, move it the minimum distance so that the
3069 * iterator in this range.
3071 * Returns: %TRUE if the iterator was moved, otherwise %FALSE.
3074 gtk_text_layout_clamp_iter_to_vrange (GtkTextLayout *layout,
3079 GdkRectangle iter_rect;
3081 gtk_text_layout_get_iter_location (layout, iter, &iter_rect);
3083 /* If the iter is at least partially above the range, put the iter
3084 * at the first fully visible line after the range.
3086 if (iter_rect.y < top)
3088 find_display_line_below (layout, iter, top);
3092 /* Otherwise, if the iter is at least partially below the screen, put the
3093 * iter on the last logical position of the last completely visible
3096 else if (iter_rect.y + iter_rect.height > bottom)
3098 find_display_line_above (layout, iter, bottom);
3107 * gtk_text_layout_move_iter_to_previous_line:
3108 * @layout: a #GtkLayout
3109 * @iter: a #GtkTextIter
3111 * Move the iterator to the beginning of the previous line. The lines
3112 * of a wrapped paragraph are treated as distinct for this operation.
3115 gtk_text_layout_move_iter_to_previous_line (GtkTextLayout *layout,
3119 GtkTextLineDisplay *display;
3122 PangoLayoutLine *layout_line;
3124 gboolean update_byte = FALSE;
3126 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
3127 g_return_val_if_fail (iter != NULL, FALSE);
3132 line = _gtk_text_iter_get_text_line (iter);
3133 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3134 line_byte = line_display_iter_to_index (layout, display, iter);
3136 /* If display->height == 0 then the line is invisible, so don't
3139 while (display->height == 0)
3141 GtkTextLine *prev_line;
3143 prev_line = _gtk_text_line_previous (line);
3145 if (prev_line == NULL)
3147 line_display_index_to_iter (layout, display, iter, 0, 0);
3151 gtk_text_layout_free_line_display (layout, display);
3154 display = gtk_text_layout_get_line_display (layout, prev_line, FALSE);
3158 tmp_list = pango_layout_get_lines_readonly (display->layout);
3159 layout_line = tmp_list->data;
3163 line_byte = layout_line->start_index + layout_line->length;
3166 if (line_byte < layout_line->length || !tmp_list->next) /* first line of paragraph */
3168 GtkTextLine *prev_line;
3170 prev_line = _gtk_text_line_previous (line);
3172 /* first line of the whole buffer, do not move the iter and return FALSE */
3173 if (prev_line == NULL)
3178 gtk_text_layout_free_line_display (layout, display);
3180 display = gtk_text_layout_get_line_display (layout, prev_line, FALSE);
3182 if (display->height > 0)
3184 tmp_list = g_slist_last (pango_layout_get_lines_readonly (display->layout));
3185 layout_line = tmp_list->data;
3187 line_display_index_to_iter (layout, display, iter,
3188 layout_line->start_index + layout_line->length, 0);
3192 prev_line = _gtk_text_line_previous (prev_line);
3197 gint prev_offset = layout_line->start_index;
3199 tmp_list = tmp_list->next;
3202 layout_line = tmp_list->data;
3204 if (line_byte < layout_line->start_index + layout_line->length ||
3207 line_display_index_to_iter (layout, display, iter, prev_offset, 0);
3211 prev_offset = layout_line->start_index;
3212 tmp_list = tmp_list->next;
3218 gtk_text_layout_free_line_display (layout, display);
3221 !gtk_text_iter_equal (iter, &orig) &&
3222 !gtk_text_iter_is_end (iter);
3226 * gtk_text_layout_move_iter_to_next_line:
3227 * @layout: a #GtkLayout
3228 * @iter: a #GtkTextIter
3230 * Move the iterator to the beginning of the next line. The
3231 * lines of a wrapped paragraph are treated as distinct for
3235 gtk_text_layout_move_iter_to_next_line (GtkTextLayout *layout,
3239 GtkTextLineDisplay *display;
3242 gboolean found = FALSE;
3243 gboolean found_after = FALSE;
3244 gboolean first = TRUE;
3246 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
3247 g_return_val_if_fail (iter != NULL, FALSE);
3251 line = _gtk_text_iter_get_text_line (iter);
3253 while (line && !found_after)
3257 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3259 if (display->height == 0)
3264 line_byte = line_display_iter_to_index (layout, display, iter);
3270 tmp_list = pango_layout_get_lines_readonly (display->layout);
3271 while (tmp_list && !found_after)
3273 PangoLayoutLine *layout_line = tmp_list->data;
3277 line_display_index_to_iter (layout, display, iter,
3278 layout_line->start_index, 0);
3281 else if (line_byte < layout_line->start_index + layout_line->length || !tmp_list->next)
3284 tmp_list = tmp_list->next;
3289 gtk_text_layout_free_line_display (layout, display);
3291 line = _gtk_text_line_next_excluding_last (line);
3295 gtk_text_buffer_get_end_iter (layout->buffer, iter);
3298 !gtk_text_iter_equal (iter, &orig) &&
3299 !gtk_text_iter_is_end (iter);
3303 * gtk_text_layout_move_iter_to_line_end:
3304 * @layout: a #GtkTextLayout
3305 * @direction: if negative, move to beginning of line, otherwise
3306 move to end of line.
3308 * Move to the beginning or end of a display line.
3311 gtk_text_layout_move_iter_to_line_end (GtkTextLayout *layout,
3316 GtkTextLineDisplay *display;
3321 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
3322 g_return_val_if_fail (iter != NULL, FALSE);
3326 line = _gtk_text_iter_get_text_line (iter);
3327 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3328 line_byte = line_display_iter_to_index (layout, display, iter);
3330 tmp_list = pango_layout_get_lines_readonly (display->layout);
3333 PangoLayoutLine *layout_line = tmp_list->data;
3335 if (line_byte < layout_line->start_index + layout_line->length || !tmp_list->next)
3337 line_display_index_to_iter (layout, display, iter,
3338 direction < 0 ? layout_line->start_index : layout_line->start_index + layout_line->length,
3341 /* FIXME: As a bad hack, we move back one position when we
3342 * are inside a paragraph to avoid going to next line on a
3343 * forced break not at whitespace. Real fix is to keep track
3344 * of whether marks are at leading or trailing edge? */
3345 if (direction > 0 && layout_line->length > 0 &&
3346 !gtk_text_iter_ends_line (iter) &&
3347 !_gtk_text_btree_char_is_invisible (iter))
3348 gtk_text_iter_backward_char (iter);
3352 tmp_list = tmp_list->next;
3355 gtk_text_layout_free_line_display (layout, display);
3358 !gtk_text_iter_equal (iter, &orig) &&
3359 !gtk_text_iter_is_end (iter);
3364 * gtk_text_layout_iter_starts_line:
3365 * @layout: a #GtkTextLayout
3366 * @iter: iterator to test
3368 * Tests whether an iterator is at the start of a display line.
3371 gtk_text_layout_iter_starts_line (GtkTextLayout *layout,
3372 const GtkTextIter *iter)
3375 GtkTextLineDisplay *display;
3379 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
3380 g_return_val_if_fail (iter != NULL, FALSE);
3382 line = _gtk_text_iter_get_text_line (iter);
3383 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3384 line_byte = line_display_iter_to_index (layout, display, iter);
3386 tmp_list = pango_layout_get_lines_readonly (display->layout);
3389 PangoLayoutLine *layout_line = tmp_list->data;
3391 if (line_byte < layout_line->start_index + layout_line->length ||
3394 /* We're located on this line or the para delimiters before
3397 gtk_text_layout_free_line_display (layout, display);
3399 if (line_byte == layout_line->start_index)
3405 tmp_list = tmp_list->next;
3408 g_assert_not_reached ();
3413 gtk_text_layout_get_iter_at_line (GtkTextLayout *layout,
3418 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
3419 iter, line, byte_offset);
3424 * gtk_text_layout_move_iter_to_x:
3425 * @layout: a #GtkTextLayout
3426 * @iter: a #GtkTextIter
3429 * Keeping the iterator on the same line of the layout, move it to the
3430 * specified X coordinate. The lines of a wrapped paragraph are
3431 * treated as distinct for this operation.
3434 gtk_text_layout_move_iter_to_x (GtkTextLayout *layout,
3439 GtkTextLineDisplay *display;
3441 PangoLayoutIter *layout_iter;
3443 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
3444 g_return_if_fail (iter != NULL);
3446 line = _gtk_text_iter_get_text_line (iter);
3448 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3449 line_byte = line_display_iter_to_index (layout, display, iter);
3451 layout_iter = pango_layout_get_iter (display->layout);
3455 PangoLayoutLine *layout_line = pango_layout_iter_get_line_readonly (layout_iter);
3457 if (line_byte < layout_line->start_index + layout_line->length ||
3458 pango_layout_iter_at_last_line (layout_iter))
3460 PangoRectangle logical_rect;
3461 gint byte_index, trailing;
3462 gint x_offset = display->x_offset * PANGO_SCALE;
3464 pango_layout_iter_get_line_extents (layout_iter, NULL, &logical_rect);
3466 pango_layout_line_x_to_index (layout_line,
3467 x * PANGO_SCALE - x_offset - logical_rect.x,
3468 &byte_index, &trailing);
3470 line_display_index_to_iter (layout, display, iter, byte_index, trailing);
3475 while (pango_layout_iter_next_line (layout_iter));
3477 pango_layout_iter_free (layout_iter);
3479 gtk_text_layout_free_line_display (layout, display);
3483 * gtk_text_layout_move_iter_visually:
3484 * @layout: a #GtkTextLayout
3485 * @iter: a #GtkTextIter
3486 * @count: number of characters to move (negative moves left, positive moves right)
3488 * Move the iterator a given number of characters visually, treating
3489 * it as the strong cursor position. If @count is positive, then the
3490 * new strong cursor position will be @count positions to the right of
3491 * the old cursor position. If @count is negative then the new strong
3492 * cursor position will be @count positions to the left of the old
3495 * In the presence of bidirection text, the correspondence
3496 * between logical and visual order will depend on the direction
3497 * of the current run, and there may be jumps when the cursor
3498 * is moved off of the end of a run.
3502 gtk_text_layout_move_iter_visually (GtkTextLayout *layout,
3506 GtkTextLineDisplay *display = NULL;
3508 GtkTextIter lineiter;
3510 g_return_val_if_fail (layout != NULL, FALSE);
3511 g_return_val_if_fail (iter != NULL, FALSE);
3517 GtkTextLine *line = _gtk_text_iter_get_text_line (iter);
3519 gint extra_back = 0;
3522 int byte_count = _gtk_text_line_byte_count (line);
3528 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3530 if (layout->cursor_direction == GTK_TEXT_DIR_NONE)
3533 strong = display->direction == layout->cursor_direction;
3535 line_byte = line_display_iter_to_index (layout, display, iter);
3539 pango_layout_move_cursor_visually (display->layout, strong, line_byte, 0, 1, &new_index, &new_trailing);
3544 pango_layout_move_cursor_visually (display->layout, strong, line_byte, 0, -1, &new_index, &new_trailing);
3548 /* We need to handle the preedit string specially. Well, we don't really need to
3549 * handle it specially, since hopefully calling gtk_im_context_reset() will
3550 * remove the preedit string; but if we start off in front of the preedit
3551 * string (logically) and end up in or on the back edge of the preedit string,
3552 * we should move the iter one place farther.
3554 if (layout->preedit_len > 0 && display->insert_index >= 0)
3556 if (line_byte == display->insert_index + layout->preedit_len &&
3557 new_index < display->insert_index + layout->preedit_len)
3559 line_byte = display->insert_index;
3564 if (new_index < 0 || (new_index == 0 && extra_back))
3568 line = _gtk_text_line_previous (line);
3572 while (totally_invisible_line (layout, line, &lineiter));
3574 gtk_text_layout_free_line_display (layout, display);
3575 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3576 gtk_text_iter_forward_to_line_end (&lineiter);
3577 new_index = gtk_text_iter_get_visible_line_index (&lineiter);
3579 else if (new_index > byte_count)
3583 line = _gtk_text_line_next_excluding_last (line);
3587 while (totally_invisible_line (layout, line, &lineiter));
3589 gtk_text_layout_free_line_display (layout, display);
3590 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3594 line_display_index_to_iter (layout, display, iter, new_index, new_trailing);
3596 gtk_text_iter_backward_char (iter);
3599 gtk_text_layout_free_line_display (layout, display);
3604 !gtk_text_iter_equal (iter, &orig) &&
3605 !gtk_text_iter_is_end (iter);
3609 gtk_text_layout_spew (GtkTextLayout *layout)
3612 GtkTextDisplayLine *iter;
3614 guint paragraphs = 0;
3615 GtkTextLine *last_line = NULL;
3617 iter = layout->line_list;
3618 while (iter != NULL)
3620 if (iter->line != last_line)
3622 printf ("%5u paragraph (%p)\n", paragraphs, iter->line);
3624 last_line = iter->line;
3627 printf (" %5u y: %d len: %d start: %d bytes: %d\n",
3628 wrapped, iter->y, iter->length, iter->byte_offset,
3635 printf ("Layout %s recompute\n",
3636 layout->need_recompute ? "needs" : "doesn't need");
3638 printf ("Layout pars: %u lines: %u size: %d x %d Screen width: %d\n",
3639 paragraphs, wrapped, layout->width,
3640 layout->height, layout->screen_width);
3644 /* Catch all situations that move the insertion point.
3647 gtk_text_layout_mark_set_handler (GtkTextBuffer *buffer,
3648 const GtkTextIter *location,
3652 GtkTextLayout *layout = GTK_TEXT_LAYOUT (data);
3654 if (mark == gtk_text_buffer_get_insert (buffer))
3655 gtk_text_layout_update_cursor_line (layout);
3659 gtk_text_layout_buffer_insert_text (GtkTextBuffer *textbuffer,
3665 GtkTextLayout *layout = GTK_TEXT_LAYOUT (data);
3667 gtk_text_layout_update_cursor_line (layout);
3671 gtk_text_layout_buffer_delete_range (GtkTextBuffer *textbuffer,
3676 GtkTextLayout *layout = GTK_TEXT_LAYOUT (data);
3678 gtk_text_layout_update_cursor_line (layout);