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 g_slist_foreach (display->cursors, (GFunc)g_free, NULL);
831 g_slist_free (display->cursors);
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->invisible_set &&
1287 !seg->body.toggle.info->tag->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->invisible_set &&
1296 seg->body.toggle.info->tag->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;
1414 static PangoAttribute *
1415 gtk_text_attr_appearance_copy (const PangoAttribute *attr)
1417 const GtkTextAttrAppearance *appearance_attr = (const GtkTextAttrAppearance *)attr;
1419 return gtk_text_attr_appearance_new (&appearance_attr->appearance);
1423 gtk_text_attr_appearance_destroy (PangoAttribute *attr)
1425 GtkTextAttrAppearance *appearance_attr = (GtkTextAttrAppearance *)attr;
1427 g_slice_free (GtkTextAttrAppearance, appearance_attr);
1431 gtk_text_attr_appearance_compare (const PangoAttribute *attr1,
1432 const PangoAttribute *attr2)
1434 const GtkTextAppearance *appearance1 = &((const GtkTextAttrAppearance *)attr1)->appearance;
1435 const GtkTextAppearance *appearance2 = &((const GtkTextAttrAppearance *)attr2)->appearance;
1437 return (gdk_color_equal (&appearance1->fg_color, &appearance2->fg_color) &&
1438 gdk_color_equal (&appearance1->bg_color, &appearance2->bg_color) &&
1439 appearance1->underline == appearance2->underline &&
1440 appearance1->strikethrough == appearance2->strikethrough &&
1441 appearance1->draw_bg == appearance2->draw_bg);
1445 * gtk_text_attr_appearance_new:
1448 * Create a new font description attribute. (This attribute
1449 * allows setting family, style, weight, variant, stretch,
1450 * and size simultaneously.)
1454 static PangoAttribute *
1455 gtk_text_attr_appearance_new (const GtkTextAppearance *appearance)
1457 static PangoAttrClass klass = {
1459 gtk_text_attr_appearance_copy,
1460 gtk_text_attr_appearance_destroy,
1461 gtk_text_attr_appearance_compare
1464 GtkTextAttrAppearance *result;
1467 klass.type = gtk_text_attr_appearance_type =
1468 pango_attr_type_register ("GtkTextAttrAppearance");
1470 result = g_slice_new (GtkTextAttrAppearance);
1471 result->attr.klass = &klass;
1473 result->appearance = *appearance;
1475 return (PangoAttribute *)result;
1479 add_generic_attrs (GtkTextLayout *layout,
1480 GtkTextAppearance *appearance,
1482 PangoAttrList *attrs,
1487 PangoAttribute *attr;
1489 if (appearance->underline != PANGO_UNDERLINE_NONE)
1491 attr = pango_attr_underline_new (appearance->underline);
1493 attr->start_index = start;
1494 attr->end_index = start + byte_count;
1496 pango_attr_list_insert (attrs, attr);
1499 if (appearance->strikethrough)
1501 attr = pango_attr_strikethrough_new (appearance->strikethrough);
1503 attr->start_index = start;
1504 attr->end_index = start + byte_count;
1506 pango_attr_list_insert (attrs, attr);
1509 if (appearance->rise != 0)
1511 attr = pango_attr_rise_new (appearance->rise);
1513 attr->start_index = start;
1514 attr->end_index = start + byte_count;
1516 pango_attr_list_insert (attrs, attr);
1521 attr = gtk_text_attr_appearance_new (appearance);
1523 attr->start_index = start;
1524 attr->end_index = start + byte_count;
1526 ((GtkTextAttrAppearance *)attr)->appearance.is_text = is_text;
1528 pango_attr_list_insert (attrs, attr);
1533 add_text_attrs (GtkTextLayout *layout,
1534 GtkTextAttributes *style,
1536 PangoAttrList *attrs,
1540 PangoAttribute *attr;
1542 attr = pango_attr_font_desc_new (style->font);
1543 attr->start_index = start;
1544 attr->end_index = start + byte_count;
1546 pango_attr_list_insert (attrs, attr);
1548 if (style->font_scale != 1.0)
1550 attr = pango_attr_scale_new (style->font_scale);
1552 attr->start_index = start;
1553 attr->end_index = start + byte_count;
1555 pango_attr_list_insert (attrs, attr);
1560 add_pixbuf_attrs (GtkTextLayout *layout,
1561 GtkTextLineDisplay *display,
1562 GtkTextAttributes *style,
1563 GtkTextLineSegment *seg,
1564 PangoAttrList *attrs,
1567 PangoAttribute *attr;
1568 PangoRectangle logical_rect;
1569 GtkTextPixbuf *pixbuf = &seg->body.pixbuf;
1572 width = gdk_pixbuf_get_width (pixbuf->pixbuf);
1573 height = gdk_pixbuf_get_height (pixbuf->pixbuf);
1576 logical_rect.y = -height * PANGO_SCALE;
1577 logical_rect.width = width * PANGO_SCALE;
1578 logical_rect.height = height * PANGO_SCALE;
1580 attr = pango_attr_shape_new_with_data (&logical_rect, &logical_rect,
1581 pixbuf->pixbuf, NULL, NULL);
1582 attr->start_index = start;
1583 attr->end_index = start + seg->byte_count;
1584 pango_attr_list_insert (attrs, attr);
1586 display->shaped_objects =
1587 g_slist_append (display->shaped_objects, pixbuf->pixbuf);
1591 add_child_attrs (GtkTextLayout *layout,
1592 GtkTextLineDisplay *display,
1593 GtkTextAttributes *style,
1594 GtkTextLineSegment *seg,
1595 PangoAttrList *attrs,
1598 PangoAttribute *attr;
1599 PangoRectangle logical_rect;
1607 tmp_list = seg->body.child.widgets;
1608 while (tmp_list != NULL)
1610 GtkWidget *child = tmp_list->data;
1612 if (_gtk_anchored_child_get_layout (child) == layout)
1617 gtk_widget_get_child_requisition (child, &req);
1620 height = req.height;
1627 tmp_list = g_slist_next (tmp_list);
1630 if (tmp_list == NULL)
1632 /* If tmp_list == NULL then there is no widget at this anchor in
1633 * this display; not an error. We make up an arbitrary size
1634 * to use, just so the programmer can see the blank spot.
1635 * We also put a NULL in the shaped objects list, to keep
1636 * the correspondence between the list and the shaped chars in
1637 * the layout. A bad hack, yes.
1646 display->shaped_objects = g_slist_append (display->shaped_objects, widget);
1649 logical_rect.y = -height * PANGO_SCALE;
1650 logical_rect.width = width * PANGO_SCALE;
1651 logical_rect.height = height * PANGO_SCALE;
1653 attr = pango_attr_shape_new_with_data (&logical_rect, &logical_rect,
1654 widget, NULL, NULL);
1655 attr->start_index = start;
1656 attr->end_index = start + seg->byte_count;
1657 pango_attr_list_insert (attrs, attr);
1662 * @layout: a #GtkTextLayout
1663 * @display: a #GtkTextLineDisplay
1664 * @insert_iter: iter pointing to the cursor location
1665 * @insert_index: cursor offset in the @display's layout, it may
1666 * be different from @insert_iter's offset in case when preedit
1667 * string is present.
1668 * @pos: location to store cursor position
1669 * @cursor_at_line_end: whether cursor is at the end of line
1671 * Checks whether layout should display block cursor at given position.
1672 * For this layout must be in overwrite mode and text at @insert_iter
1676 get_block_cursor (GtkTextLayout *layout,
1677 GtkTextLineDisplay *display,
1678 const GtkTextIter *insert_iter,
1681 gboolean *cursor_at_line_end)
1683 PangoRectangle pango_pos;
1685 if (layout->overwrite_mode &&
1686 gtk_text_iter_editable (insert_iter, TRUE) &&
1687 _gtk_text_util_get_block_cursor_location (display->layout,
1690 cursor_at_line_end))
1694 pos->x = PANGO_PIXELS (pango_pos.x);
1695 pos->y = PANGO_PIXELS (pango_pos.y);
1696 pos->width = PANGO_PIXELS (pango_pos.width);
1697 pos->height = PANGO_PIXELS (pango_pos.height);
1707 add_cursor (GtkTextLayout *layout,
1708 GtkTextLineDisplay *display,
1709 GtkTextLineSegment *seg,
1712 PangoRectangle strong_pos, weak_pos;
1713 GtkTextCursorDisplay *cursor = NULL; /* Quiet GCC */
1714 gboolean add_weak = FALSE;
1715 gboolean add_strong = FALSE;
1717 /* Hide insertion cursor when we have a selection or the layout
1718 * user has hidden the cursor.
1720 if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
1721 seg->body.mark.obj) &&
1722 (!layout->cursor_visible ||
1723 gtk_text_buffer_get_selection_bounds (layout->buffer, NULL, NULL)))
1726 if (layout->overwrite_mode &&
1727 _gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
1728 seg->body.mark.obj))
1731 gboolean cursor_at_line_end;
1733 _gtk_text_btree_get_iter_at_mark (_gtk_text_buffer_get_btree (layout->buffer),
1734 &iter, seg->body.mark.obj);
1736 if (get_block_cursor (layout, display, &iter, start,
1737 &display->block_cursor,
1738 &cursor_at_line_end))
1740 display->has_block_cursor = TRUE;
1741 display->cursor_at_line_end = cursor_at_line_end;
1746 pango_layout_get_cursor_pos (display->layout, start, &strong_pos, &weak_pos);
1748 if (layout->cursor_direction == GTK_TEXT_DIR_NONE)
1753 else if (display->direction == layout->cursor_direction)
1760 cursor = g_new (GtkTextCursorDisplay, 1);
1762 cursor->x = PANGO_PIXELS (strong_pos.x);
1763 cursor->y = PANGO_PIXELS (strong_pos.y);
1764 cursor->height = PANGO_PIXELS (strong_pos.height);
1765 cursor->is_strong = TRUE;
1766 cursor->is_weak = (layout->cursor_direction == GTK_TEXT_DIR_NONE) ? FALSE : TRUE;
1767 display->cursors = g_slist_prepend (display->cursors, cursor);
1772 if (weak_pos.x == strong_pos.x && add_strong)
1773 cursor->is_weak = TRUE;
1776 cursor = g_new (GtkTextCursorDisplay, 1);
1778 cursor->x = PANGO_PIXELS (weak_pos.x);
1779 cursor->y = PANGO_PIXELS (weak_pos.y);
1780 cursor->height = PANGO_PIXELS (weak_pos.height);
1781 cursor->is_strong = (layout->cursor_direction == GTK_TEXT_DIR_NONE) ? FALSE : TRUE;
1782 cursor->is_weak = TRUE;
1783 display->cursors = g_slist_prepend (display->cursors, cursor);
1789 is_shape (PangoLayoutRun *run)
1791 GSList *tmp_list = run->item->analysis.extra_attrs;
1795 PangoAttribute *attr = tmp_list->data;
1797 if (attr->klass->type == PANGO_ATTR_SHAPE)
1800 tmp_list = tmp_list->next;
1807 allocate_child_widgets (GtkTextLayout *text_layout,
1808 GtkTextLineDisplay *display)
1810 PangoLayout *layout = display->layout;
1811 PangoLayoutIter *run_iter;
1813 run_iter = pango_layout_get_iter (layout);
1816 PangoLayoutRun *run = pango_layout_iter_get_run_readonly (run_iter);
1818 if (run && is_shape (run))
1821 GtkTextIter text_iter;
1822 GtkTextChildAnchor *anchor = NULL;
1823 GList *widgets = NULL;
1826 /* The pango iterator iterates in visual order.
1827 * We use the byte index to find the child widget.
1829 byte_index = pango_layout_iter_get_index (run_iter);
1830 line_display_index_to_iter (text_layout, display, &text_iter, byte_index, 0);
1831 anchor = gtk_text_iter_get_child_anchor (&text_iter);
1833 widgets = gtk_text_child_anchor_get_widgets (anchor);
1835 for (l = widgets; l; l = l->next)
1837 PangoRectangle extents;
1838 GtkWidget *child = l->data;
1840 if (_gtk_anchored_child_get_layout (child) == text_layout)
1843 /* We emit "allocate_child" with the x,y of
1844 * the widget with respect to the top of the line
1845 * and the left side of the buffer
1847 pango_layout_iter_get_run_extents (run_iter,
1851 g_signal_emit (text_layout,
1852 signals[ALLOCATE_CHILD],
1855 PANGO_PIXELS (extents.x) + display->x_offset,
1856 PANGO_PIXELS (extents.y) + display->top_margin);
1860 g_list_free (widgets);
1863 while (pango_layout_iter_next_run (run_iter));
1865 pango_layout_iter_free (run_iter);
1869 convert_color (GdkColor *result,
1870 PangoAttrColor *attr)
1872 result->red = attr->color.red;
1873 result->blue = attr->color.blue;
1874 result->green = attr->color.green;
1877 /* This function is used to convert the preedit string attributes, which are
1878 * standard PangoAttributes, into the custom attributes used by the text
1879 * widget and insert them into a attr list with a given offset.
1882 add_preedit_attrs (GtkTextLayout *layout,
1883 GtkTextAttributes *style,
1884 PangoAttrList *attrs,
1888 PangoAttrIterator *iter = pango_attr_list_get_iterator (layout->preedit_attrs);
1892 GtkTextAppearance appearance = style->appearance;
1893 PangoFontDescription *font_desc = pango_font_description_copy_static (style->font);
1894 PangoAttribute *insert_attr;
1895 GSList *extra_attrs = NULL;
1897 PangoLanguage *language;
1900 pango_attr_iterator_range (iter, &start, &end);
1902 if (end == G_MAXINT)
1903 end = layout->preedit_len;
1908 pango_attr_iterator_get_font (iter, font_desc, &language, &extra_attrs);
1910 tmp_list = extra_attrs;
1913 PangoAttribute *attr = tmp_list->data;
1915 switch (attr->klass->type)
1917 case PANGO_ATTR_FOREGROUND:
1918 convert_color (&appearance.fg_color, (PangoAttrColor *)attr);
1920 case PANGO_ATTR_BACKGROUND:
1921 convert_color (&appearance.bg_color, (PangoAttrColor *)attr);
1922 appearance.draw_bg = TRUE;
1924 case PANGO_ATTR_UNDERLINE:
1925 appearance.underline = ((PangoAttrInt *)attr)->value;
1927 case PANGO_ATTR_STRIKETHROUGH:
1928 appearance.strikethrough = ((PangoAttrInt *)attr)->value;
1930 case PANGO_ATTR_RISE:
1931 appearance.rise = ((PangoAttrInt *)attr)->value;
1937 pango_attribute_destroy (attr);
1938 tmp_list = tmp_list->next;
1941 g_slist_free (extra_attrs);
1943 insert_attr = pango_attr_font_desc_new (font_desc);
1944 insert_attr->start_index = start + offset;
1945 insert_attr->end_index = end + offset;
1947 pango_attr_list_insert (attrs, insert_attr);
1951 insert_attr = pango_attr_language_new (language);
1952 insert_attr->start_index = start + offset;
1953 insert_attr->end_index = end + offset;
1955 pango_attr_list_insert (attrs, insert_attr);
1958 add_generic_attrs (layout, &appearance, end - start,
1959 attrs, start + offset,
1962 pango_font_description_free (font_desc);
1964 while (pango_attr_iterator_next (iter));
1966 pango_attr_iterator_destroy (iter);
1969 /* Iterate over the line and fill in display->cursors.
1970 * It's a stripped copy of gtk_text_layout_get_line_display() */
1972 update_text_display_cursors (GtkTextLayout *layout,
1974 GtkTextLineDisplay *display)
1976 GtkTextLineSegment *seg;
1978 gint layout_byte_offset, buffer_byte_offset;
1979 GSList *cursor_byte_offsets = NULL;
1980 GSList *cursor_segs = NULL;
1981 GSList *tmp_list1, *tmp_list2;
1983 if (!display->cursors_invalid)
1986 display->cursors_invalid = FALSE;
1988 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
1991 /* Special-case optimization for completely
1992 * invisible lines; makes it faster to deal
1993 * with sequences of invisible lines.
1995 if (totally_invisible_line (layout, line, &iter))
1998 /* Iterate over segments */
1999 layout_byte_offset = 0; /* position in the layout text (includes preedit, does not include invisible text) */
2000 buffer_byte_offset = 0; /* position in the buffer line */
2001 seg = _gtk_text_iter_get_any_segment (&iter);
2004 /* Displayable segments */
2005 if (seg->type == >k_text_char_type ||
2006 seg->type == >k_text_pixbuf_type ||
2007 seg->type == >k_text_child_type)
2009 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2011 buffer_byte_offset);
2013 if (!_gtk_text_btree_char_is_invisible (&iter))
2014 layout_byte_offset += seg->byte_count;
2016 buffer_byte_offset += seg->byte_count;
2020 else if (seg->type == >k_text_right_mark_type ||
2021 seg->type == >k_text_left_mark_type)
2023 gint cursor_offset = 0;
2025 /* At the insertion point, add the preedit string, if any */
2027 if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
2028 seg->body.mark.obj))
2030 display->insert_index = layout_byte_offset;
2032 if (layout->preedit_len > 0)
2034 layout_byte_offset += layout->preedit_len;
2035 /* DO NOT increment the buffer byte offset for preedit */
2036 cursor_offset = layout->preedit_cursor - layout->preedit_len;
2040 /* Display visible marks */
2042 if (seg->body.mark.visible)
2044 cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets,
2045 GINT_TO_POINTER (layout_byte_offset + cursor_offset));
2046 cursor_segs = g_slist_prepend (cursor_segs, seg);
2051 else if (seg->type == >k_text_toggle_on_type ||
2052 seg->type == >k_text_toggle_off_type)
2057 g_error ("Unknown segment type: %s", seg->type->name);
2062 tmp_list1 = cursor_byte_offsets;
2063 tmp_list2 = cursor_segs;
2066 add_cursor (layout, display, tmp_list2->data,
2067 GPOINTER_TO_INT (tmp_list1->data));
2068 tmp_list1 = tmp_list1->next;
2069 tmp_list2 = tmp_list2->next;
2071 g_slist_free (cursor_byte_offsets);
2072 g_slist_free (cursor_segs);
2075 /* Same as _gtk_text_btree_get_tags(), except it returns GPtrArray,
2076 * to be used in gtk_text_layout_get_line_display(). */
2078 get_tags_array_at_iter (GtkTextIter *iter)
2081 GPtrArray *array = NULL;
2084 tags = _gtk_text_btree_get_tags (iter, &n_tags);
2088 array = g_ptr_array_sized_new (n_tags);
2089 g_ptr_array_set_size (array, n_tags);
2090 memcpy (array->pdata, tags, n_tags * sizeof (GtkTextTag*));
2097 /* Add the tag to the array if it's not there already, and remove
2098 * it otherwise. It keeps the array sorted by tags priority. */
2100 tags_array_toggle_tag (GPtrArray *array,
2107 array = g_ptr_array_new ();
2109 tags = (GtkTextTag**) array->pdata;
2111 for (pos = 0; pos < array->len && tags[pos]->priority < tag->priority; pos++) ;
2113 if (pos < array->len && tags[pos] == tag)
2114 g_ptr_array_remove_index (array, pos);
2117 g_ptr_array_set_size (array, array->len + 1);
2118 if (pos < array->len - 1)
2119 memmove (array->pdata + pos + 1, array->pdata + pos,
2120 (array->len - pos - 1) * sizeof (GtkTextTag*));
2121 array->pdata[pos] = tag;
2127 GtkTextLineDisplay *
2128 gtk_text_layout_get_line_display (GtkTextLayout *layout,
2132 GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout);
2133 GtkTextLineDisplay *display;
2134 GtkTextLineSegment *seg;
2136 GtkTextAttributes *style;
2138 PangoAttrList *attrs;
2139 gint text_allocated, layout_byte_offset, buffer_byte_offset;
2140 PangoRectangle extents;
2141 gboolean para_values_set = FALSE;
2142 GSList *cursor_byte_offsets = NULL;
2143 GSList *cursor_segs = NULL;
2144 GSList *tmp_list1, *tmp_list2;
2145 gboolean saw_widget = FALSE;
2146 PangoDirection base_dir;
2148 gboolean initial_toggle_segments;
2150 g_return_val_if_fail (line != NULL, NULL);
2152 if (layout->one_display_cache)
2154 if (line == layout->one_display_cache->line &&
2155 (size_only || !layout->one_display_cache->size_only))
2158 update_text_display_cursors (layout, line, layout->one_display_cache);
2159 return layout->one_display_cache;
2163 GtkTextLineDisplay *tmp_display = layout->one_display_cache;
2164 layout->one_display_cache = NULL;
2165 gtk_text_layout_free_line_display (layout, tmp_display);
2169 DV (g_print ("creating one line display cache (%s)\n", G_STRLOC));
2171 display = g_new0 (GtkTextLineDisplay, 1);
2173 display->size_only = size_only;
2174 display->line = line;
2175 display->insert_index = -1;
2177 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2180 /* Special-case optimization for completely
2181 * invisible lines; makes it faster to deal
2182 * with sequences of invisible lines.
2184 if (totally_invisible_line (layout, line, &iter))
2186 if (display->direction == GTK_TEXT_DIR_RTL)
2187 display->layout = pango_layout_new (layout->rtl_context);
2189 display->layout = pango_layout_new (layout->ltr_context);
2194 /* Find the bidi base direction */
2195 base_dir = line->dir_propagated_forward;
2196 if (base_dir == PANGO_DIRECTION_NEUTRAL)
2197 base_dir = line->dir_propagated_back;
2199 if (line == priv->cursor_line &&
2200 line->dir_strong == PANGO_DIRECTION_NEUTRAL)
2202 base_dir = (layout->keyboard_direction == GTK_TEXT_DIR_LTR) ?
2203 PANGO_DIRECTION_LTR : PANGO_DIRECTION_RTL;
2206 /* Allocate space for flat text for buffer
2208 text_allocated = _gtk_text_line_byte_count (line);
2209 text = g_malloc (text_allocated);
2211 attrs = pango_attr_list_new ();
2213 /* Iterate over segments, creating display chunks for them, and updating the tags array. */
2214 layout_byte_offset = 0; /* current length of layout text (includes preedit, does not include invisible text) */
2215 buffer_byte_offset = 0; /* position in the buffer line */
2216 seg = _gtk_text_iter_get_any_segment (&iter);
2217 tags = get_tags_array_at_iter (&iter);
2218 initial_toggle_segments = TRUE;
2221 /* Displayable segments */
2222 if (seg->type == >k_text_char_type ||
2223 seg->type == >k_text_pixbuf_type ||
2224 seg->type == >k_text_child_type)
2226 style = get_style (layout, tags);
2227 initial_toggle_segments = FALSE;
2229 /* We have to delay setting the paragraph values until we
2230 * hit the first pixbuf or text segment because toggles at
2231 * the beginning of the paragraph should affect the
2232 * paragraph-global values
2234 if (!para_values_set)
2236 set_para_values (layout, base_dir, style, display);
2237 para_values_set = TRUE;
2240 /* First see if the chunk is invisible, and ignore it if so. Tk
2241 * looked at tabs, wrap mode, etc. before doing this, but
2242 * that made no sense to me, so I am just skipping the
2245 if (!style->invisible)
2247 if (seg->type == >k_text_char_type)
2249 /* We don't want to split segments because of marks,
2250 * so we scan forward for more segments only
2251 * separated from us by marks. In theory, we should
2252 * also merge segments with identical styles, even
2253 * if there are toggles in-between
2257 GtkTextLineSegment *prev_seg = NULL;
2261 if (seg->type == >k_text_char_type)
2263 memcpy (text + layout_byte_offset, seg->body.chars, seg->byte_count);
2264 layout_byte_offset += seg->byte_count;
2265 buffer_byte_offset += seg->byte_count;
2266 bytes += seg->byte_count;
2268 else if (seg->type == >k_text_right_mark_type ||
2269 seg->type == >k_text_left_mark_type)
2271 /* If we have preedit string, break out of this loop - we'll almost
2272 * certainly have different attributes on the preedit string
2275 if (layout->preedit_len > 0 &&
2276 _gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
2277 seg->body.mark.obj))
2280 if (seg->body.mark.visible)
2282 cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets, GINT_TO_POINTER (layout_byte_offset));
2283 cursor_segs = g_slist_prepend (cursor_segs, seg);
2284 if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
2285 seg->body.mark.obj))
2286 display->insert_index = layout_byte_offset;
2296 seg = prev_seg; /* Back up one */
2297 add_generic_attrs (layout, &style->appearance,
2299 attrs, layout_byte_offset - bytes,
2301 add_text_attrs (layout, style, bytes, attrs,
2302 layout_byte_offset - bytes, size_only);
2304 else if (seg->type == >k_text_pixbuf_type)
2306 add_generic_attrs (layout,
2309 attrs, layout_byte_offset,
2311 add_pixbuf_attrs (layout, display, style,
2312 seg, attrs, layout_byte_offset);
2313 memcpy (text + layout_byte_offset, gtk_text_unknown_char_utf8,
2315 layout_byte_offset += seg->byte_count;
2316 buffer_byte_offset += seg->byte_count;
2318 else if (seg->type == >k_text_child_type)
2322 add_generic_attrs (layout, &style->appearance,
2324 attrs, layout_byte_offset,
2326 add_child_attrs (layout, display, style,
2327 seg, attrs, layout_byte_offset);
2328 memcpy (text + layout_byte_offset, gtk_text_unknown_char_utf8,
2330 layout_byte_offset += seg->byte_count;
2331 buffer_byte_offset += seg->byte_count;
2335 /* We don't know this segment type */
2336 g_assert_not_reached ();
2339 } /* if (segment was visible) */
2342 /* Invisible segment */
2343 buffer_byte_offset += seg->byte_count;
2346 release_style (layout, style);
2350 else if (seg->type == >k_text_toggle_on_type ||
2351 seg->type == >k_text_toggle_off_type)
2353 /* Style may have changed, drop our
2354 current cached style */
2355 invalidate_cached_style (layout);
2356 /* Add the tag only after we have seen some non-toggle non-mark segment,
2357 * otherwise the tag is already accounted for by _gtk_text_btree_get_tags(). */
2358 if (!initial_toggle_segments)
2359 tags = tags_array_toggle_tag (tags, seg->body.toggle.info->tag);
2363 else if (seg->type == >k_text_right_mark_type ||
2364 seg->type == >k_text_left_mark_type)
2366 gint cursor_offset = 0;
2368 /* At the insertion point, add the preedit string, if any */
2370 if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
2371 seg->body.mark.obj))
2373 display->insert_index = layout_byte_offset;
2375 if (layout->preedit_len > 0)
2377 text_allocated += layout->preedit_len;
2378 text = g_realloc (text, text_allocated);
2380 style = get_style (layout, tags);
2381 add_preedit_attrs (layout, style, attrs, layout_byte_offset, size_only);
2382 release_style (layout, style);
2384 memcpy (text + layout_byte_offset, layout->preedit_string, layout->preedit_len);
2385 layout_byte_offset += layout->preedit_len;
2386 /* DO NOT increment the buffer byte offset for preedit */
2388 cursor_offset = layout->preedit_cursor - layout->preedit_len;
2393 /* Display visible marks */
2395 if (seg->body.mark.visible)
2397 cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets,
2398 GINT_TO_POINTER (layout_byte_offset + cursor_offset));
2399 cursor_segs = g_slist_prepend (cursor_segs, seg);
2404 g_error ("Unknown segment type: %s", seg->type->name);
2409 if (!para_values_set)
2411 style = get_style (layout, tags);
2412 set_para_values (layout, base_dir, style, display);
2413 release_style (layout, style);
2416 /* Pango doesn't want the trailing paragraph delimiters */
2419 /* Only one character has type G_UNICODE_PARAGRAPH_SEPARATOR in
2420 * Unicode 3.0; update this if that changes.
2422 #define PARAGRAPH_SEPARATOR 0x2029
2425 if (layout_byte_offset > 0)
2427 const char *prev = g_utf8_prev_char (text + layout_byte_offset);
2428 ch = g_utf8_get_char (prev);
2429 if (ch == PARAGRAPH_SEPARATOR || ch == '\r' || ch == '\n')
2430 layout_byte_offset = prev - text; /* chop off */
2432 if (ch == '\n' && layout_byte_offset > 0)
2434 /* Possibly chop a CR as well */
2435 prev = g_utf8_prev_char (text + layout_byte_offset);
2437 --layout_byte_offset;
2442 pango_layout_set_text (display->layout, text, layout_byte_offset);
2443 pango_layout_set_attributes (display->layout, attrs);
2445 tmp_list1 = cursor_byte_offsets;
2446 tmp_list2 = cursor_segs;
2449 add_cursor (layout, display, tmp_list2->data,
2450 GPOINTER_TO_INT (tmp_list1->data));
2451 tmp_list1 = tmp_list1->next;
2452 tmp_list2 = tmp_list2->next;
2454 g_slist_free (cursor_byte_offsets);
2455 g_slist_free (cursor_segs);
2457 pango_layout_get_extents (display->layout, NULL, &extents);
2459 display->width = PIXEL_BOUND (extents.width) + display->left_margin + display->right_margin;
2460 display->height += PANGO_PIXELS (extents.height);
2462 /* If we aren't wrapping, we need to do the alignment of each
2463 * paragraph ourselves.
2465 if (pango_layout_get_width (display->layout) < 0)
2467 gint excess = display->total_width - display->width;
2469 switch (pango_layout_get_alignment (display->layout))
2471 case PANGO_ALIGN_LEFT:
2473 case PANGO_ALIGN_CENTER:
2474 display->x_offset += excess / 2;
2476 case PANGO_ALIGN_RIGHT:
2477 display->x_offset += excess;
2482 /* Free this if we aren't in a loop */
2483 if (layout->wrap_loop_count == 0)
2484 invalidate_cached_style (layout);
2487 pango_attr_list_unref (attrs);
2489 g_ptr_array_free (tags, TRUE);
2491 layout->one_display_cache = display;
2494 allocate_child_widgets (layout, display);
2500 gtk_text_layout_free_line_display (GtkTextLayout *layout,
2501 GtkTextLineDisplay *display)
2503 if (display != layout->one_display_cache)
2505 if (display->layout)
2506 g_object_unref (display->layout);
2508 if (display->cursors)
2510 g_slist_foreach (display->cursors, (GFunc)g_free, NULL);
2511 g_slist_free (display->cursors);
2513 g_slist_free (display->shaped_objects);
2515 if (display->pg_bg_color)
2516 gdk_color_free (display->pg_bg_color);
2522 /* Functions to convert iter <=> index for the line of a GtkTextLineDisplay
2523 * taking into account the preedit string and invisible text if necessary.
2526 line_display_iter_to_index (GtkTextLayout *layout,
2527 GtkTextLineDisplay *display,
2528 const GtkTextIter *iter)
2532 g_return_val_if_fail (_gtk_text_iter_get_text_line (iter) == display->line, 0);
2534 index = gtk_text_iter_get_visible_line_index (iter);
2536 if (layout->preedit_len > 0 && display->insert_index >= 0)
2538 if (index >= display->insert_index)
2539 index += layout->preedit_len;
2546 line_display_index_to_iter (GtkTextLayout *layout,
2547 GtkTextLineDisplay *display,
2552 g_return_if_fail (!_gtk_text_line_is_last (display->line,
2553 _gtk_text_buffer_get_btree (layout->buffer)));
2555 if (layout->preedit_len > 0 && display->insert_index >= 0)
2557 if (index >= display->insert_index + layout->preedit_len)
2558 index -= layout->preedit_len;
2559 else if (index > display->insert_index)
2561 index = display->insert_index;
2566 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2567 iter, display->line, 0);
2569 gtk_text_iter_set_visible_line_index (iter, index);
2571 if (_gtk_text_iter_get_text_line (iter) != display->line)
2573 /* Clamp to end of line - really this clamping should have been done
2574 * before here, maybe in Pango, this is a broken band-aid I think
2576 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2577 iter, display->line, 0);
2579 if (!gtk_text_iter_ends_line (iter))
2580 gtk_text_iter_forward_to_line_end (iter);
2583 gtk_text_iter_forward_chars (iter, trailing);
2587 get_line_at_y (GtkTextLayout *layout,
2594 if (y > layout->height)
2597 *line = _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
2598 layout, y, line_top);
2601 *line = _gtk_text_btree_get_end_iter_line (_gtk_text_buffer_get_btree (layout->buffer));
2605 _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2611 * gtk_text_layout_get_line_at_y:
2612 * @layout: a #GtkLayout
2613 * @target_iter: the iterator in which the result is stored
2614 * @y: the y positition
2615 * @line_top: location to store the y coordinate of the
2616 * top of the line. (Can by %NULL)
2618 * Get the iter at the beginning of the line which is displayed
2622 gtk_text_layout_get_line_at_y (GtkTextLayout *layout,
2623 GtkTextIter *target_iter,
2629 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2630 g_return_if_fail (target_iter != NULL);
2632 get_line_at_y (layout, y, &line, line_top);
2633 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2634 target_iter, line, 0);
2638 gtk_text_layout_get_iter_at_pixel (GtkTextLayout *layout,
2639 GtkTextIter *target_iter,
2645 gtk_text_layout_get_iter_at_position (layout, target_iter, &trailing, x, y);
2647 gtk_text_iter_forward_chars (target_iter, trailing);
2650 void gtk_text_layout_get_iter_at_position (GtkTextLayout *layout,
2651 GtkTextIter *target_iter,
2659 GtkTextLineDisplay *display;
2661 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2662 g_return_if_fail (target_iter != NULL);
2664 get_line_at_y (layout, y, &line, &line_top);
2666 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2668 x -= display->x_offset;
2669 y -= line_top + display->top_margin;
2671 /* If we are below the layout, position the cursor at the last character
2674 if (y > display->height - display->top_margin - display->bottom_margin)
2676 byte_index = _gtk_text_line_byte_count (line);
2682 /* Ignore the "outside" return value from pango. Pango is doing
2683 * the right thing even if we are outside the layout in the
2686 pango_layout_xy_to_index (display->layout, x * PANGO_SCALE, y * PANGO_SCALE,
2687 &byte_index, trailing);
2690 line_display_index_to_iter (layout, display, target_iter, byte_index, 0);
2692 gtk_text_layout_free_line_display (layout, display);
2697 * gtk_text_layout_get_cursor_locations:
2698 * @layout: a #GtkTextLayout
2699 * @iter: a #GtkTextIter
2700 * @strong_pos: (allow-none): location to store the strong cursor position (may be %NULL)
2701 * @weak_pos: (allow-none): location to store the weak cursor position (may be %NULL)
2703 * Given an iterator within a text layout, determine the positions of the
2704 * strong and weak cursors if the insertion point is at that
2705 * iterator. The position of each cursor is stored as a zero-width
2706 * rectangle. The strong cursor location is the location where
2707 * characters of the directionality equal to the base direction of the
2708 * paragraph are inserted. The weak cursor location is the location
2709 * where characters of the directionality opposite to the base
2710 * direction of the paragraph are inserted.
2713 gtk_text_layout_get_cursor_locations (GtkTextLayout *layout,
2715 GdkRectangle *strong_pos,
2716 GdkRectangle *weak_pos)
2719 GtkTextLineDisplay *display;
2722 GtkTextIter insert_iter;
2724 PangoRectangle pango_strong_pos;
2725 PangoRectangle pango_weak_pos;
2727 g_return_if_fail (layout != NULL);
2728 g_return_if_fail (iter != NULL);
2730 line = _gtk_text_iter_get_text_line (iter);
2731 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2732 index = line_display_iter_to_index (layout, display, iter);
2734 line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2737 gtk_text_buffer_get_iter_at_mark (layout->buffer, &insert_iter,
2738 gtk_text_buffer_get_insert (layout->buffer));
2740 if (gtk_text_iter_equal (iter, &insert_iter))
2741 index += layout->preedit_cursor - layout->preedit_len;
2743 pango_layout_get_cursor_pos (display->layout, index,
2744 strong_pos ? &pango_strong_pos : NULL,
2745 weak_pos ? &pango_weak_pos : NULL);
2749 strong_pos->x = display->x_offset + pango_strong_pos.x / PANGO_SCALE;
2750 strong_pos->y = line_top + display->top_margin + pango_strong_pos.y / PANGO_SCALE;
2751 strong_pos->width = 0;
2752 strong_pos->height = pango_strong_pos.height / PANGO_SCALE;
2757 weak_pos->x = display->x_offset + pango_weak_pos.x / PANGO_SCALE;
2758 weak_pos->y = line_top + display->top_margin + pango_weak_pos.y / PANGO_SCALE;
2759 weak_pos->width = 0;
2760 weak_pos->height = pango_weak_pos.height / PANGO_SCALE;
2763 gtk_text_layout_free_line_display (layout, display);
2767 * _gtk_text_layout_get_block_cursor:
2768 * @layout: a #GtkTextLayout
2769 * @pos: a #GdkRectangle to store block cursor position
2771 * If layout is to display a block cursor, calculates its position
2772 * and returns %TRUE. Otherwise it returns %FALSE. In case when
2773 * cursor is visible, it simply returns the position stored in
2774 * the line display, otherwise it has to compute the position
2775 * (see get_block_cursor()).
2778 _gtk_text_layout_get_block_cursor (GtkTextLayout *layout,
2782 GtkTextLineDisplay *display;
2785 gboolean block = FALSE;
2787 g_return_val_if_fail (layout != NULL, FALSE);
2789 gtk_text_buffer_get_iter_at_mark (layout->buffer, &iter,
2790 gtk_text_buffer_get_insert (layout->buffer));
2791 line = _gtk_text_iter_get_text_line (&iter);
2792 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2794 if (display->has_block_cursor)
2797 rect = display->block_cursor;
2801 gint index = display->insert_index;
2804 index = gtk_text_iter_get_line_index (&iter);
2806 if (get_block_cursor (layout, display, &iter, index, &rect, NULL))
2814 line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2818 pos->x += display->x_offset;
2819 pos->y += line_top + display->top_margin;
2822 gtk_text_layout_free_line_display (layout, display);
2827 * gtk_text_layout_get_line_yrange:
2828 * @layout: a #GtkTextLayout
2829 * @iter: a #GtkTextIter
2830 * @y: location to store the top of the paragraph in pixels,
2832 * @height location to store the height of the paragraph in pixels,
2835 * Find the range of y coordinates for the paragraph containing
2839 gtk_text_layout_get_line_yrange (GtkTextLayout *layout,
2840 const GtkTextIter *iter,
2846 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2847 g_return_if_fail (_gtk_text_iter_get_btree (iter) == _gtk_text_buffer_get_btree (layout->buffer));
2849 line = _gtk_text_iter_get_text_line (iter);
2852 *y = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2856 GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
2858 *height = line_data->height;
2865 * _gtk_text_layout_get_line_xrange:
2866 * @layout: a #GtkTextLayout
2867 * @iter: a #GtkTextIter
2868 * @x: location to store the top of the paragraph in pixels,
2870 * @width location to store the height of the paragraph in pixels,
2873 * Find the range of X coordinates for the paragraph containing
2874 * the given iter. Private for 2.0 due to API freeze, could
2875 * be made public for 2.2.
2878 _gtk_text_layout_get_line_xrange (GtkTextLayout *layout,
2879 const GtkTextIter *iter,
2885 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2886 g_return_if_fail (_gtk_text_iter_get_btree (iter) == _gtk_text_buffer_get_btree (layout->buffer));
2888 line = _gtk_text_iter_get_text_line (iter);
2891 *x = 0; /* FIXME This is wrong; should represent the first available cursor position */
2895 GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
2897 *width = line_data->width;
2904 gtk_text_layout_get_iter_location (GtkTextLayout *layout,
2905 const GtkTextIter *iter,
2908 PangoRectangle pango_rect;
2911 GtkTextLineDisplay *display;
2915 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2916 g_return_if_fail (_gtk_text_iter_get_btree (iter) == _gtk_text_buffer_get_btree (layout->buffer));
2917 g_return_if_fail (rect != NULL);
2919 tree = _gtk_text_iter_get_btree (iter);
2920 line = _gtk_text_iter_get_text_line (iter);
2922 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2924 rect->y = _gtk_text_btree_find_line_top (tree, line, layout);
2926 x_offset = display->x_offset * PANGO_SCALE;
2928 byte_index = gtk_text_iter_get_line_index (iter);
2930 pango_layout_index_to_pos (display->layout, byte_index, &pango_rect);
2932 rect->x = PANGO_PIXELS (x_offset + pango_rect.x);
2933 rect->y += PANGO_PIXELS (pango_rect.y) + display->top_margin;
2934 rect->width = PANGO_PIXELS (pango_rect.width);
2935 rect->height = PANGO_PIXELS (pango_rect.height);
2937 gtk_text_layout_free_line_display (layout, display);
2942 /* Find the iter for the logical beginning of the first display line whose
2943 * top y is >= y. If none exists, move the iter to the logical beginning
2944 * of the last line in the buffer.
2947 find_display_line_below (GtkTextLayout *layout,
2951 GtkTextLine *line, *next;
2952 GtkTextLine *found_line = NULL;
2954 gint found_byte = 0;
2956 line = _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
2957 layout, y, &line_top);
2961 _gtk_text_btree_get_end_iter_line (_gtk_text_buffer_get_btree (layout->buffer));
2964 _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2968 while (line && !found_line)
2970 GtkTextLineDisplay *display = gtk_text_layout_get_line_display (layout, line, FALSE);
2971 PangoLayoutIter *layout_iter;
2973 layout_iter = pango_layout_get_iter (display->layout);
2975 line_top += display->top_margin;
2979 gint first_y, last_y;
2980 PangoLayoutLine *layout_line = pango_layout_iter_get_line_readonly (layout_iter);
2982 found_byte = layout_line->start_index;
2990 pango_layout_iter_get_line_yrange (layout_iter, &first_y, &last_y);
2991 line_top += (last_y - first_y) / PANGO_SCALE;
2993 while (pango_layout_iter_next_line (layout_iter));
2995 pango_layout_iter_free (layout_iter);
2997 line_top += display->bottom_margin;
2998 gtk_text_layout_free_line_display (layout, display);
3000 next = _gtk_text_line_next_excluding_last (line);
3007 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
3008 iter, found_line, found_byte);
3011 /* Find the iter for the logical beginning of the last display line whose
3012 * top y is >= y. If none exists, move the iter to the logical beginning
3013 * of the first line in the buffer.
3016 find_display_line_above (GtkTextLayout *layout,
3021 GtkTextLine *found_line = NULL;
3023 gint found_byte = 0;
3025 line = _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer), layout, y, &line_top);
3028 line = _gtk_text_btree_get_end_iter_line (_gtk_text_buffer_get_btree (layout->buffer));
3030 line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer), line, layout);
3033 while (line && !found_line)
3035 GtkTextLineDisplay *display = gtk_text_layout_get_line_display (layout, line, FALSE);
3036 PangoRectangle logical_rect;
3037 PangoLayoutIter *layout_iter;
3040 layout_iter = pango_layout_get_iter (display->layout);
3042 line_top -= display->top_margin + display->bottom_margin;
3043 pango_layout_iter_get_layout_extents (layout_iter, NULL, &logical_rect);
3044 line_top -= logical_rect.height / PANGO_SCALE;
3046 tmp_top = line_top + display->top_margin;
3050 gint first_y, last_y;
3051 PangoLayoutLine *layout_line = pango_layout_iter_get_line_readonly (layout_iter);
3053 found_byte = layout_line->start_index;
3055 pango_layout_iter_get_line_yrange (layout_iter, &first_y, &last_y);
3057 tmp_top -= (last_y - first_y) / PANGO_SCALE;
3062 pango_layout_iter_free (layout_iter);
3066 while (pango_layout_iter_next_line (layout_iter));
3068 pango_layout_iter_free (layout_iter);
3070 gtk_text_layout_free_line_display (layout, display);
3072 line = _gtk_text_line_previous (line);
3078 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
3079 iter, found_line, found_byte);
3081 gtk_text_buffer_get_iter_at_offset (layout->buffer, iter, 0);
3085 * gtk_text_layout_clamp_iter_to_vrange:
3086 * @layout: a #GtkTextLayout
3087 * @iter: a #GtkTextIter
3088 * @top: the top of the range
3089 * @bottom: the bottom the range
3091 * If the iterator is not fully in the range @top <= y < @bottom,
3092 * then, if possible, move it the minimum distance so that the
3093 * iterator in this range.
3095 * Returns: %TRUE if the iterator was moved, otherwise %FALSE.
3098 gtk_text_layout_clamp_iter_to_vrange (GtkTextLayout *layout,
3103 GdkRectangle iter_rect;
3105 gtk_text_layout_get_iter_location (layout, iter, &iter_rect);
3107 /* If the iter is at least partially above the range, put the iter
3108 * at the first fully visible line after the range.
3110 if (iter_rect.y < top)
3112 find_display_line_below (layout, iter, top);
3116 /* Otherwise, if the iter is at least partially below the screen, put the
3117 * iter on the last logical position of the last completely visible
3120 else if (iter_rect.y + iter_rect.height > bottom)
3122 find_display_line_above (layout, iter, bottom);
3131 * gtk_text_layout_move_iter_to_previous_line:
3132 * @layout: a #GtkLayout
3133 * @iter: a #GtkTextIter
3135 * Move the iterator to the beginning of the previous line. The lines
3136 * of a wrapped paragraph are treated as distinct for this operation.
3139 gtk_text_layout_move_iter_to_previous_line (GtkTextLayout *layout,
3143 GtkTextLineDisplay *display;
3146 PangoLayoutLine *layout_line;
3148 gboolean update_byte = FALSE;
3150 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
3151 g_return_val_if_fail (iter != NULL, FALSE);
3156 line = _gtk_text_iter_get_text_line (iter);
3157 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3158 line_byte = line_display_iter_to_index (layout, display, iter);
3160 /* If display->height == 0 then the line is invisible, so don't
3163 while (display->height == 0)
3165 GtkTextLine *prev_line;
3167 prev_line = _gtk_text_line_previous (line);
3169 if (prev_line == NULL)
3171 line_display_index_to_iter (layout, display, iter, 0, 0);
3175 gtk_text_layout_free_line_display (layout, display);
3178 display = gtk_text_layout_get_line_display (layout, prev_line, FALSE);
3182 tmp_list = pango_layout_get_lines_readonly (display->layout);
3183 layout_line = tmp_list->data;
3187 line_byte = layout_line->start_index + layout_line->length;
3190 if (line_byte < layout_line->length || !tmp_list->next) /* first line of paragraph */
3192 GtkTextLine *prev_line;
3194 prev_line = _gtk_text_line_previous (line);
3196 /* first line of the whole buffer, do not move the iter and return FALSE */
3197 if (prev_line == NULL)
3202 gtk_text_layout_free_line_display (layout, display);
3204 display = gtk_text_layout_get_line_display (layout, prev_line, FALSE);
3206 if (display->height > 0)
3208 tmp_list = g_slist_last (pango_layout_get_lines_readonly (display->layout));
3209 layout_line = tmp_list->data;
3211 line_display_index_to_iter (layout, display, iter,
3212 layout_line->start_index + layout_line->length, 0);
3216 prev_line = _gtk_text_line_previous (prev_line);
3221 gint prev_offset = layout_line->start_index;
3223 tmp_list = tmp_list->next;
3226 layout_line = tmp_list->data;
3228 if (line_byte < layout_line->start_index + layout_line->length ||
3231 line_display_index_to_iter (layout, display, iter, prev_offset, 0);
3235 prev_offset = layout_line->start_index;
3236 tmp_list = tmp_list->next;
3242 gtk_text_layout_free_line_display (layout, display);
3245 !gtk_text_iter_equal (iter, &orig) &&
3246 !gtk_text_iter_is_end (iter);
3250 * gtk_text_layout_move_iter_to_next_line:
3251 * @layout: a #GtkLayout
3252 * @iter: a #GtkTextIter
3254 * Move the iterator to the beginning of the next line. The
3255 * lines of a wrapped paragraph are treated as distinct for
3259 gtk_text_layout_move_iter_to_next_line (GtkTextLayout *layout,
3263 GtkTextLineDisplay *display;
3266 gboolean found = FALSE;
3267 gboolean found_after = FALSE;
3268 gboolean first = TRUE;
3270 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
3271 g_return_val_if_fail (iter != NULL, FALSE);
3275 line = _gtk_text_iter_get_text_line (iter);
3277 while (line && !found_after)
3281 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3283 if (display->height == 0)
3288 line_byte = line_display_iter_to_index (layout, display, iter);
3294 tmp_list = pango_layout_get_lines_readonly (display->layout);
3295 while (tmp_list && !found_after)
3297 PangoLayoutLine *layout_line = tmp_list->data;
3301 line_display_index_to_iter (layout, display, iter,
3302 layout_line->start_index, 0);
3305 else if (line_byte < layout_line->start_index + layout_line->length || !tmp_list->next)
3308 tmp_list = tmp_list->next;
3313 gtk_text_layout_free_line_display (layout, display);
3315 line = _gtk_text_line_next_excluding_last (line);
3319 gtk_text_buffer_get_end_iter (layout->buffer, iter);
3322 !gtk_text_iter_equal (iter, &orig) &&
3323 !gtk_text_iter_is_end (iter);
3327 * gtk_text_layout_move_iter_to_line_end:
3328 * @layout: a #GtkTextLayout
3329 * @direction: if negative, move to beginning of line, otherwise
3330 move to end of line.
3332 * Move to the beginning or end of a display line.
3335 gtk_text_layout_move_iter_to_line_end (GtkTextLayout *layout,
3340 GtkTextLineDisplay *display;
3345 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
3346 g_return_val_if_fail (iter != NULL, FALSE);
3350 line = _gtk_text_iter_get_text_line (iter);
3351 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3352 line_byte = line_display_iter_to_index (layout, display, iter);
3354 tmp_list = pango_layout_get_lines_readonly (display->layout);
3357 PangoLayoutLine *layout_line = tmp_list->data;
3359 if (line_byte < layout_line->start_index + layout_line->length || !tmp_list->next)
3361 line_display_index_to_iter (layout, display, iter,
3362 direction < 0 ? layout_line->start_index : layout_line->start_index + layout_line->length,
3365 /* FIXME: As a bad hack, we move back one position when we
3366 * are inside a paragraph to avoid going to next line on a
3367 * forced break not at whitespace. Real fix is to keep track
3368 * of whether marks are at leading or trailing edge? */
3369 if (direction > 0 && layout_line->length > 0 &&
3370 !gtk_text_iter_ends_line (iter) &&
3371 !_gtk_text_btree_char_is_invisible (iter))
3372 gtk_text_iter_backward_char (iter);
3376 tmp_list = tmp_list->next;
3379 gtk_text_layout_free_line_display (layout, display);
3382 !gtk_text_iter_equal (iter, &orig) &&
3383 !gtk_text_iter_is_end (iter);
3388 * gtk_text_layout_iter_starts_line:
3389 * @layout: a #GtkTextLayout
3390 * @iter: iterator to test
3392 * Tests whether an iterator is at the start of a display line.
3395 gtk_text_layout_iter_starts_line (GtkTextLayout *layout,
3396 const GtkTextIter *iter)
3399 GtkTextLineDisplay *display;
3403 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
3404 g_return_val_if_fail (iter != NULL, FALSE);
3406 line = _gtk_text_iter_get_text_line (iter);
3407 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3408 line_byte = line_display_iter_to_index (layout, display, iter);
3410 tmp_list = pango_layout_get_lines_readonly (display->layout);
3413 PangoLayoutLine *layout_line = tmp_list->data;
3415 if (line_byte < layout_line->start_index + layout_line->length ||
3418 /* We're located on this line or the para delimiters before
3421 gtk_text_layout_free_line_display (layout, display);
3423 if (line_byte == layout_line->start_index)
3429 tmp_list = tmp_list->next;
3432 g_assert_not_reached ();
3437 gtk_text_layout_get_iter_at_line (GtkTextLayout *layout,
3442 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
3443 iter, line, byte_offset);
3448 * gtk_text_layout_move_iter_to_x:
3449 * @layout: a #GtkTextLayout
3450 * @iter: a #GtkTextIter
3453 * Keeping the iterator on the same line of the layout, move it to the
3454 * specified X coordinate. The lines of a wrapped paragraph are
3455 * treated as distinct for this operation.
3458 gtk_text_layout_move_iter_to_x (GtkTextLayout *layout,
3463 GtkTextLineDisplay *display;
3465 PangoLayoutIter *layout_iter;
3467 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
3468 g_return_if_fail (iter != NULL);
3470 line = _gtk_text_iter_get_text_line (iter);
3472 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3473 line_byte = line_display_iter_to_index (layout, display, iter);
3475 layout_iter = pango_layout_get_iter (display->layout);
3479 PangoLayoutLine *layout_line = pango_layout_iter_get_line_readonly (layout_iter);
3481 if (line_byte < layout_line->start_index + layout_line->length ||
3482 pango_layout_iter_at_last_line (layout_iter))
3484 PangoRectangle logical_rect;
3485 gint byte_index, trailing;
3486 gint x_offset = display->x_offset * PANGO_SCALE;
3488 pango_layout_iter_get_line_extents (layout_iter, NULL, &logical_rect);
3490 pango_layout_line_x_to_index (layout_line,
3491 x * PANGO_SCALE - x_offset - logical_rect.x,
3492 &byte_index, &trailing);
3494 line_display_index_to_iter (layout, display, iter, byte_index, trailing);
3499 while (pango_layout_iter_next_line (layout_iter));
3501 pango_layout_iter_free (layout_iter);
3503 gtk_text_layout_free_line_display (layout, display);
3507 * gtk_text_layout_move_iter_visually:
3508 * @layout: a #GtkTextLayout
3509 * @iter: a #GtkTextIter
3510 * @count: number of characters to move (negative moves left, positive moves right)
3512 * Move the iterator a given number of characters visually, treating
3513 * it as the strong cursor position. If @count is positive, then the
3514 * new strong cursor position will be @count positions to the right of
3515 * the old cursor position. If @count is negative then the new strong
3516 * cursor position will be @count positions to the left of the old
3519 * In the presence of bidirection text, the correspondence
3520 * between logical and visual order will depend on the direction
3521 * of the current run, and there may be jumps when the cursor
3522 * is moved off of the end of a run.
3526 gtk_text_layout_move_iter_visually (GtkTextLayout *layout,
3530 GtkTextLineDisplay *display = NULL;
3532 GtkTextIter lineiter;
3534 g_return_val_if_fail (layout != NULL, FALSE);
3535 g_return_val_if_fail (iter != NULL, FALSE);
3541 GtkTextLine *line = _gtk_text_iter_get_text_line (iter);
3543 gint extra_back = 0;
3546 int byte_count = _gtk_text_line_byte_count (line);
3552 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3554 if (layout->cursor_direction == GTK_TEXT_DIR_NONE)
3557 strong = display->direction == layout->cursor_direction;
3559 line_byte = line_display_iter_to_index (layout, display, iter);
3563 pango_layout_move_cursor_visually (display->layout, strong, line_byte, 0, 1, &new_index, &new_trailing);
3568 pango_layout_move_cursor_visually (display->layout, strong, line_byte, 0, -1, &new_index, &new_trailing);
3572 /* We need to handle the preedit string specially. Well, we don't really need to
3573 * handle it specially, since hopefully calling gtk_im_context_reset() will
3574 * remove the preedit string; but if we start off in front of the preedit
3575 * string (logically) and end up in or on the back edge of the preedit string,
3576 * we should move the iter one place farther.
3578 if (layout->preedit_len > 0 && display->insert_index >= 0)
3580 if (line_byte == display->insert_index + layout->preedit_len &&
3581 new_index < display->insert_index + layout->preedit_len)
3583 line_byte = display->insert_index;
3588 if (new_index < 0 || (new_index == 0 && extra_back))
3592 line = _gtk_text_line_previous (line);
3597 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
3598 &lineiter, line, 0);
3600 while (totally_invisible_line (layout, line, &lineiter));
3602 gtk_text_layout_free_line_display (layout, display);
3603 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3604 gtk_text_iter_forward_to_line_end (&lineiter);
3605 new_index = gtk_text_iter_get_visible_line_index (&lineiter);
3607 else if (new_index > byte_count)
3611 line = _gtk_text_line_next_excluding_last (line);
3615 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
3616 &lineiter, line, 0);
3618 while (totally_invisible_line (layout, line, &lineiter));
3620 gtk_text_layout_free_line_display (layout, display);
3621 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3625 line_display_index_to_iter (layout, display, iter, new_index, new_trailing);
3627 gtk_text_iter_backward_char (iter);
3630 gtk_text_layout_free_line_display (layout, display);
3635 !gtk_text_iter_equal (iter, &orig) &&
3636 !gtk_text_iter_is_end (iter);
3640 gtk_text_layout_spew (GtkTextLayout *layout)
3643 GtkTextDisplayLine *iter;
3645 guint paragraphs = 0;
3646 GtkTextLine *last_line = NULL;
3648 iter = layout->line_list;
3649 while (iter != NULL)
3651 if (iter->line != last_line)
3653 printf ("%5u paragraph (%p)\n", paragraphs, iter->line);
3655 last_line = iter->line;
3658 printf (" %5u y: %d len: %d start: %d bytes: %d\n",
3659 wrapped, iter->y, iter->length, iter->byte_offset,
3666 printf ("Layout %s recompute\n",
3667 layout->need_recompute ? "needs" : "doesn't need");
3669 printf ("Layout pars: %u lines: %u size: %d x %d Screen width: %d\n",
3670 paragraphs, wrapped, layout->width,
3671 layout->height, layout->screen_width);
3675 /* Catch all situations that move the insertion point.
3678 gtk_text_layout_mark_set_handler (GtkTextBuffer *buffer,
3679 const GtkTextIter *location,
3683 GtkTextLayout *layout = GTK_TEXT_LAYOUT (data);
3685 if (mark == gtk_text_buffer_get_insert (buffer))
3686 gtk_text_layout_update_cursor_line (layout);
3690 gtk_text_layout_buffer_insert_text (GtkTextBuffer *textbuffer,
3696 GtkTextLayout *layout = GTK_TEXT_LAYOUT (data);
3698 gtk_text_layout_update_cursor_line (layout);
3702 gtk_text_layout_buffer_delete_range (GtkTextBuffer *textbuffer,
3707 GtkTextLayout *layout = GTK_TEXT_LAYOUT (data);
3709 gtk_text_layout_update_cursor_line (layout);