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"
92 #define GTK_TEXT_LAYOUT_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GTK_TYPE_TEXT_LAYOUT, GtkTextLayoutPrivate))
94 typedef struct _GtkTextLayoutPrivate GtkTextLayoutPrivate;
96 struct _GtkTextLayoutPrivate
98 /* Cache the line that the cursor is positioned on, as the keyboard
99 direction only influences the direction of the cursor line.
101 GtkTextLine *cursor_line;
104 static GtkTextLineData *gtk_text_layout_real_wrap (GtkTextLayout *layout,
107 GtkTextLineData *line_data);
109 static void gtk_text_layout_invalidated (GtkTextLayout *layout);
111 static void gtk_text_layout_real_invalidate (GtkTextLayout *layout,
112 const GtkTextIter *start,
113 const GtkTextIter *end);
114 static void gtk_text_layout_real_invalidate_cursors(GtkTextLayout *layout,
115 const GtkTextIter *start,
116 const GtkTextIter *end);
117 static void gtk_text_layout_invalidate_cache (GtkTextLayout *layout,
119 gboolean cursors_only);
120 static void gtk_text_layout_invalidate_cursor_line (GtkTextLayout *layout,
121 gboolean cursors_only);
122 static void gtk_text_layout_real_free_line_data (GtkTextLayout *layout,
124 GtkTextLineData *line_data);
125 static void gtk_text_layout_emit_changed (GtkTextLayout *layout,
130 static void gtk_text_layout_invalidate_all (GtkTextLayout *layout);
132 static PangoAttribute *gtk_text_attr_appearance_new (const GtkTextAppearance *appearance);
134 static void gtk_text_layout_mark_set_handler (GtkTextBuffer *buffer,
135 const GtkTextIter *location,
138 static void gtk_text_layout_buffer_insert_text (GtkTextBuffer *textbuffer,
143 static void gtk_text_layout_buffer_delete_range (GtkTextBuffer *textbuffer,
148 static void gtk_text_layout_update_cursor_line (GtkTextLayout *layout);
162 #define PIXEL_BOUND(d) (((d) + PANGO_SCALE - 1) / PANGO_SCALE)
164 static void gtk_text_layout_finalize (GObject *object);
166 static guint signals[LAST_SIGNAL] = { 0 };
168 PangoAttrType gtk_text_attr_appearance_type = 0;
170 G_DEFINE_TYPE (GtkTextLayout, gtk_text_layout, G_TYPE_OBJECT)
173 gtk_text_layout_class_init (GtkTextLayoutClass *klass)
175 GObjectClass *object_class = G_OBJECT_CLASS (klass);
177 object_class->finalize = gtk_text_layout_finalize;
179 klass->wrap = gtk_text_layout_real_wrap;
180 klass->invalidate = gtk_text_layout_real_invalidate;
181 klass->invalidate_cursors = gtk_text_layout_real_invalidate_cursors;
182 klass->free_line_data = gtk_text_layout_real_free_line_data;
184 signals[INVALIDATED] =
185 g_signal_new (I_("invalidated"),
186 G_OBJECT_CLASS_TYPE (object_class),
188 G_STRUCT_OFFSET (GtkTextLayoutClass, invalidated),
190 _gtk_marshal_VOID__VOID,
195 g_signal_new (I_("changed"),
196 G_OBJECT_CLASS_TYPE (object_class),
198 G_STRUCT_OFFSET (GtkTextLayoutClass, changed),
200 _gtk_marshal_VOID__INT_INT_INT,
207 signals[ALLOCATE_CHILD] =
208 g_signal_new (I_("allocate_child"),
209 G_OBJECT_CLASS_TYPE (object_class),
211 G_STRUCT_OFFSET (GtkTextLayoutClass, allocate_child),
213 _gtk_marshal_VOID__OBJECT_INT_INT,
220 g_type_class_add_private (object_class, sizeof (GtkTextLayoutPrivate));
224 gtk_text_layout_init (GtkTextLayout *text_layout)
226 text_layout->cursor_visible = TRUE;
230 gtk_text_layout_new (void)
232 return g_object_new (GTK_TYPE_TEXT_LAYOUT, NULL);
236 free_style_cache (GtkTextLayout *text_layout)
238 if (text_layout->one_style_cache)
240 gtk_text_attributes_unref (text_layout->one_style_cache);
241 text_layout->one_style_cache = NULL;
246 gtk_text_layout_finalize (GObject *object)
248 GtkTextLayout *layout;
250 layout = GTK_TEXT_LAYOUT (object);
252 gtk_text_layout_set_buffer (layout, NULL);
254 if (layout->default_style)
255 gtk_text_attributes_unref (layout->default_style);
256 layout->default_style = NULL;
258 if (layout->ltr_context)
260 g_object_unref (layout->ltr_context);
261 layout->ltr_context = NULL;
263 if (layout->rtl_context)
265 g_object_unref (layout->rtl_context);
266 layout->rtl_context = NULL;
269 if (layout->one_display_cache)
271 GtkTextLineDisplay *tmp_display = layout->one_display_cache;
272 layout->one_display_cache = NULL;
273 gtk_text_layout_free_line_display (layout, tmp_display);
276 if (layout->preedit_string)
278 g_free (layout->preedit_string);
279 layout->preedit_string = NULL;
282 if (layout->preedit_attrs)
284 pango_attr_list_unref (layout->preedit_attrs);
285 layout->preedit_attrs = NULL;
289 (* G_OBJECT_CLASS (gtk_text_layout_parent_class)->finalize) (object);
293 gtk_text_layout_set_buffer (GtkTextLayout *layout,
294 GtkTextBuffer *buffer)
296 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
297 g_return_if_fail (buffer == NULL || GTK_IS_TEXT_BUFFER (buffer));
299 if (layout->buffer == buffer)
302 free_style_cache (layout);
306 _gtk_text_btree_remove_view (_gtk_text_buffer_get_btree (layout->buffer),
309 g_signal_handlers_disconnect_by_func (layout->buffer,
310 G_CALLBACK (gtk_text_layout_mark_set_handler),
312 g_signal_handlers_disconnect_by_func (layout->buffer,
313 G_CALLBACK (gtk_text_layout_buffer_insert_text),
315 g_signal_handlers_disconnect_by_func (layout->buffer,
316 G_CALLBACK (gtk_text_layout_buffer_delete_range),
319 g_object_unref (layout->buffer);
320 layout->buffer = NULL;
325 layout->buffer = buffer;
327 g_object_ref (buffer);
329 _gtk_text_btree_add_view (_gtk_text_buffer_get_btree (buffer), layout);
331 /* Bind to all signals that move the insert mark. */
332 g_signal_connect_after (layout->buffer, "mark_set",
333 G_CALLBACK (gtk_text_layout_mark_set_handler), layout);
334 g_signal_connect_after (layout->buffer, "insert_text",
335 G_CALLBACK (gtk_text_layout_buffer_insert_text), layout);
336 g_signal_connect_after (layout->buffer, "delete_range",
337 G_CALLBACK (gtk_text_layout_buffer_delete_range), layout);
339 gtk_text_layout_update_cursor_line (layout);
344 gtk_text_layout_default_style_changed (GtkTextLayout *layout)
346 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
348 DV (g_print ("invalidating all due to default style change (%s)\n", G_STRLOC));
349 gtk_text_layout_invalidate_all (layout);
353 gtk_text_layout_set_default_style (GtkTextLayout *layout,
354 GtkTextAttributes *values)
356 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
357 g_return_if_fail (values != NULL);
359 if (values == layout->default_style)
362 gtk_text_attributes_ref (values);
364 if (layout->default_style)
365 gtk_text_attributes_unref (layout->default_style);
367 layout->default_style = values;
369 gtk_text_layout_default_style_changed (layout);
373 gtk_text_layout_set_contexts (GtkTextLayout *layout,
374 PangoContext *ltr_context,
375 PangoContext *rtl_context)
377 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
379 if (layout->ltr_context != ltr_context)
381 if (layout->ltr_context)
382 g_object_unref (layout->ltr_context);
384 layout->ltr_context = ltr_context;
385 g_object_ref (layout->ltr_context);
388 if (layout->rtl_context != rtl_context)
390 if (layout->rtl_context)
391 g_object_unref (layout->rtl_context);
393 layout->rtl_context = rtl_context;
394 g_object_ref (layout->rtl_context);
397 DV (g_print ("invalidating all due to new pango contexts (%s)\n", G_STRLOC));
398 gtk_text_layout_invalidate_all (layout);
402 * gtk_text_layout_set_overwrite_mode:
403 * @layout: a #GtkTextLayout
404 * @overwrite: overwrite mode
406 * Sets overwrite mode
409 gtk_text_layout_set_overwrite_mode (GtkTextLayout *layout,
412 overwrite = overwrite != 0;
413 if (overwrite != layout->overwrite_mode)
415 layout->overwrite_mode = overwrite;
416 gtk_text_layout_invalidate_cursor_line (layout, TRUE);
421 * gtk_text_layout_set_cursor_direction:
422 * @direction: the new direction(s) for which to draw cursors.
423 * %GTK_TEXT_DIR_NONE means draw cursors for both
424 * left-to-right insertion and right-to-left insertion.
425 * (The two cursors will be visually distinguished.)
427 * Sets which text directions (left-to-right and/or right-to-left) for
428 * which cursors will be drawn for the insertion point. The visual
429 * point at which new text is inserted depends on whether the new
430 * text is right-to-left or left-to-right, so it may be desired to
431 * make the drawn position of the cursor depend on the keyboard state.
434 gtk_text_layout_set_cursor_direction (GtkTextLayout *layout,
435 GtkTextDirection direction)
437 if (direction != layout->cursor_direction)
439 layout->cursor_direction = direction;
440 gtk_text_layout_invalidate_cursor_line (layout, TRUE);
445 * gtk_text_layout_set_keyboard_direction:
446 * @keyboard_dir: the current direction of the keyboard.
448 * Sets the keyboard direction; this is used as for the bidirectional
449 * base direction for the line with the cursor if the line contains
450 * only neutral characters.
453 gtk_text_layout_set_keyboard_direction (GtkTextLayout *layout,
454 GtkTextDirection keyboard_dir)
456 if (keyboard_dir != layout->keyboard_direction)
458 layout->keyboard_direction = keyboard_dir;
459 gtk_text_layout_invalidate_cursor_line (layout, TRUE);
464 * gtk_text_layout_get_buffer:
465 * @layout: a #GtkTextLayout
467 * Gets the text buffer used by the layout. See
468 * gtk_text_layout_set_buffer().
470 * Return value: the text buffer used by the layout.
473 gtk_text_layout_get_buffer (GtkTextLayout *layout)
475 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), NULL);
477 return layout->buffer;
481 gtk_text_layout_set_screen_width (GtkTextLayout *layout, gint width)
483 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
484 g_return_if_fail (width >= 0);
485 g_return_if_fail (layout->wrap_loop_count == 0);
487 if (layout->screen_width == width)
490 layout->screen_width = width;
492 DV (g_print ("invalidating all due to new screen width (%s)\n", G_STRLOC));
493 gtk_text_layout_invalidate_all (layout);
497 * gtk_text_layout_set_cursor_visible:
498 * @layout: a #GtkTextLayout
499 * @cursor_visible: If %FALSE, then the insertion cursor will not
500 * be shown, even if the text is editable.
502 * Sets whether the insertion cursor should be shown. Generally,
503 * widgets using #GtkTextLayout will hide the cursor when the
504 * widget does not have the input focus.
507 gtk_text_layout_set_cursor_visible (GtkTextLayout *layout,
508 gboolean cursor_visible)
510 cursor_visible = (cursor_visible != FALSE);
512 if (layout->cursor_visible != cursor_visible)
517 layout->cursor_visible = cursor_visible;
519 /* Now queue a redraw on the paragraph containing the cursor
521 gtk_text_buffer_get_iter_at_mark (layout->buffer, &iter,
522 gtk_text_buffer_get_mark (layout->buffer, "insert"));
524 gtk_text_layout_get_line_yrange (layout, &iter, &y, &height);
525 gtk_text_layout_emit_changed (layout, y, height, height);
527 gtk_text_layout_invalidate_cache (layout, _gtk_text_iter_get_text_line (&iter), TRUE);
532 * gtk_text_layout_get_cursor_visible:
533 * @layout: a #GtkTextLayout
535 * Returns whether the insertion cursor will be shown.
537 * Return value: if %FALSE, the insertion cursor will not be
538 shown, even if the text is editable.
541 gtk_text_layout_get_cursor_visible (GtkTextLayout *layout)
543 return layout->cursor_visible;
547 * gtk_text_layout_set_preedit_string:
548 * @layout: a #PangoLayout
549 * @preedit_string: a string to display at the insertion point
550 * @preedit_attrs: a #PangoAttrList of attributes that apply to @preedit_string
551 * @cursor_pos: position of cursor within preedit string in chars
553 * Set the preedit string and attributes. The preedit string is a
554 * string showing text that is currently being edited and not
555 * yet committed into the buffer.
558 gtk_text_layout_set_preedit_string (GtkTextLayout *layout,
559 const gchar *preedit_string,
560 PangoAttrList *preedit_attrs,
563 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
564 g_return_if_fail (preedit_attrs != NULL || preedit_string == NULL);
566 g_free (layout->preedit_string);
568 if (layout->preedit_attrs)
569 pango_attr_list_unref (layout->preedit_attrs);
573 layout->preedit_string = g_strdup (preedit_string);
574 layout->preedit_len = strlen (layout->preedit_string);
575 pango_attr_list_ref (preedit_attrs);
576 layout->preedit_attrs = preedit_attrs;
578 cursor_pos = CLAMP (cursor_pos, 0, g_utf8_strlen (layout->preedit_string, -1));
579 layout->preedit_cursor = g_utf8_offset_to_pointer (layout->preedit_string, cursor_pos) - layout->preedit_string;
583 layout->preedit_string = NULL;
584 layout->preedit_len = 0;
585 layout->preedit_attrs = NULL;
586 layout->preedit_cursor = 0;
589 gtk_text_layout_invalidate_cursor_line (layout, FALSE);
593 gtk_text_layout_get_size (GtkTextLayout *layout,
597 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
600 *width = layout->width;
603 *height = layout->height;
607 gtk_text_layout_invalidated (GtkTextLayout *layout)
609 g_signal_emit (layout, signals[INVALIDATED], 0);
613 gtk_text_layout_emit_changed (GtkTextLayout *layout,
618 g_signal_emit (layout, signals[CHANGED], 0, y, old_height, new_height);
622 text_layout_changed (GtkTextLayout *layout,
626 gboolean cursors_only)
628 /* Check if the range intersects our cached line display,
629 * and invalidate the cached line if so.
631 if (layout->one_display_cache)
633 GtkTextLine *line = layout->one_display_cache->line;
634 gint cache_y = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
636 gint cache_height = layout->one_display_cache->height;
638 if (cache_y + cache_height > y && cache_y < y + old_height)
639 gtk_text_layout_invalidate_cache (layout, line, cursors_only);
642 gtk_text_layout_emit_changed (layout, y, old_height, new_height);
646 gtk_text_layout_changed (GtkTextLayout *layout,
651 text_layout_changed (layout, y, old_height, new_height, FALSE);
655 gtk_text_layout_cursors_changed (GtkTextLayout *layout,
660 text_layout_changed (layout, y, old_height, new_height, TRUE);
664 gtk_text_layout_free_line_data (GtkTextLayout *layout,
666 GtkTextLineData *line_data)
668 (* GTK_TEXT_LAYOUT_GET_CLASS (layout)->free_line_data)
669 (layout, line, line_data);
673 gtk_text_layout_invalidate (GtkTextLayout *layout,
674 const GtkTextIter *start_index,
675 const GtkTextIter *end_index)
677 (* GTK_TEXT_LAYOUT_GET_CLASS (layout)->invalidate)
678 (layout, start_index, end_index);
682 gtk_text_layout_invalidate_cursors (GtkTextLayout *layout,
683 const GtkTextIter *start_index,
684 const GtkTextIter *end_index)
686 (* GTK_TEXT_LAYOUT_GET_CLASS (layout)->invalidate_cursors)
687 (layout, start_index, end_index);
691 gtk_text_layout_wrap (GtkTextLayout *layout,
694 GtkTextLineData *line_data)
696 return (* GTK_TEXT_LAYOUT_GET_CLASS (layout)->wrap) (layout, line, line_data);
700 gtk_text_layout_get_lines (GtkTextLayout *layout,
701 /* [top_y, bottom_y) */
706 GtkTextLine *first_btree_line;
707 GtkTextLine *last_btree_line;
711 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), NULL);
712 g_return_val_if_fail (bottom_y > top_y, NULL);
717 _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
718 layout, top_y, first_line_y);
719 if (first_btree_line == NULL)
725 /* -1 since bottom_y is one past */
727 _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
728 layout, bottom_y - 1, NULL);
730 if (!last_btree_line)
732 _gtk_text_btree_get_end_iter_line (_gtk_text_buffer_get_btree (layout->buffer));
734 g_assert (last_btree_line != NULL);
736 line = first_btree_line;
739 retval = g_slist_prepend (retval, line);
741 if (line == last_btree_line)
744 line = _gtk_text_line_next_excluding_last (line);
747 retval = g_slist_reverse (retval);
753 invalidate_cached_style (GtkTextLayout *layout)
755 free_style_cache (layout);
758 /* These should be called around a loop which wraps a CONTIGUOUS bunch
759 * of display lines. If the lines aren't contiguous you can't call
763 gtk_text_layout_wrap_loop_start (GtkTextLayout *layout)
765 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
766 g_return_if_fail (layout->one_style_cache == NULL);
768 layout->wrap_loop_count += 1;
772 gtk_text_layout_wrap_loop_end (GtkTextLayout *layout)
774 g_return_if_fail (layout->wrap_loop_count > 0);
776 layout->wrap_loop_count -= 1;
778 if (layout->wrap_loop_count == 0)
780 /* We cache a some stuff if we're iterating over some lines wrapping
781 * them. This cleans it up.
783 /* Nuke our cached style */
784 invalidate_cached_style (layout);
785 g_assert (layout->one_style_cache == NULL);
790 gtk_text_layout_invalidate_all (GtkTextLayout *layout)
795 if (layout->buffer == NULL)
798 gtk_text_buffer_get_bounds (layout->buffer, &start, &end);
800 gtk_text_layout_invalidate (layout, &start, &end);
804 gtk_text_layout_invalidate_cache (GtkTextLayout *layout,
806 gboolean cursors_only)
808 if (layout->one_display_cache && line == layout->one_display_cache->line)
810 GtkTextLineDisplay *display = layout->one_display_cache;
814 g_slist_foreach (display->cursors, (GFunc)g_free, NULL);
815 g_slist_free (display->cursors);
816 display->cursors = NULL;
817 display->cursors_invalid = TRUE;
818 display->has_block_cursor = FALSE;
822 layout->one_display_cache = NULL;
823 gtk_text_layout_free_line_display (layout, display);
828 /* Now invalidate the paragraph containing the cursor
831 gtk_text_layout_invalidate_cursor_line (GtkTextLayout *layout,
832 gboolean cursors_only)
834 GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout);
835 GtkTextLineData *line_data;
837 if (priv->cursor_line == NULL)
840 line_data = _gtk_text_line_get_data (priv->cursor_line, layout);
844 gtk_text_layout_invalidate_cache (layout, priv->cursor_line, TRUE);
847 gtk_text_layout_invalidate_cache (layout, priv->cursor_line, FALSE);
848 _gtk_text_line_invalidate_wrap (priv->cursor_line, line_data);
851 gtk_text_layout_invalidated (layout);
856 gtk_text_layout_update_cursor_line(GtkTextLayout *layout)
858 GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout);
861 gtk_text_buffer_get_iter_at_mark (layout->buffer, &iter,
862 gtk_text_buffer_get_mark (layout->buffer, "insert"));
864 priv->cursor_line = _gtk_text_iter_get_text_line (&iter);
868 gtk_text_layout_real_invalidate (GtkTextLayout *layout,
869 const GtkTextIter *start,
870 const GtkTextIter *end)
873 GtkTextLine *last_line;
875 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
876 g_return_if_fail (layout->wrap_loop_count == 0);
878 /* Because we may be invalidating a mark, it's entirely possible
879 * that gtk_text_iter_equal (start, end) in which case we
880 * should still invalidate the line they are both on. i.e.
881 * we always invalidate the line with "start" even
882 * if there's an empty range.
886 gtk_text_view_index_spew (start_index, "invalidate start");
887 gtk_text_view_index_spew (end_index, "invalidate end");
890 last_line = _gtk_text_iter_get_text_line (end);
891 line = _gtk_text_iter_get_text_line (start);
895 GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
897 gtk_text_layout_invalidate_cache (layout, line, FALSE);
900 _gtk_text_line_invalidate_wrap (line, line_data);
902 if (line == last_line)
905 line = _gtk_text_line_next_excluding_last (line);
908 gtk_text_layout_invalidated (layout);
912 gtk_text_layout_real_invalidate_cursors (GtkTextLayout *layout,
913 const GtkTextIter *start,
914 const GtkTextIter *end)
916 /* Check if the range intersects our cached line display,
917 * and invalidate the cached line if so.
919 if (layout->one_display_cache)
921 GtkTextIter line_start, line_end;
922 GtkTextLine *line = layout->one_display_cache->line;
924 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
925 &line_start, line, 0);
926 line_end = line_start;
927 if (!gtk_text_iter_ends_line (&line_end))
928 gtk_text_iter_forward_to_line_end (&line_end);
930 if (gtk_text_iter_compare (start, end) > 0)
932 const GtkTextIter *tmp = start;
937 if (gtk_text_iter_compare (&line_start, end) <= 0 &&
938 gtk_text_iter_compare (start, &line_end) <= 0)
940 gtk_text_layout_invalidate_cache (layout, line, TRUE);
944 gtk_text_layout_invalidated (layout);
948 gtk_text_layout_real_free_line_data (GtkTextLayout *layout,
950 GtkTextLineData *line_data)
952 gtk_text_layout_invalidate_cache (layout, line, FALSE);
960 * gtk_text_layout_is_valid:
961 * @layout: a #GtkTextLayout
963 * Check if there are any invalid regions in a #GtkTextLayout's buffer
965 * Return value: %TRUE if any invalid regions were found
968 gtk_text_layout_is_valid (GtkTextLayout *layout)
970 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
972 return _gtk_text_btree_is_valid (_gtk_text_buffer_get_btree (layout->buffer),
977 update_layout_size (GtkTextLayout *layout)
979 _gtk_text_btree_get_view_size (_gtk_text_buffer_get_btree (layout->buffer),
981 &layout->width, &layout->height);
985 * gtk_text_layout_validate_yrange:
986 * @layout: a #GtkTextLayout
987 * @anchor: iter pointing into a line that will be used as the
989 * @y0_: offset from the top of the line pointed to by @anchor at
990 * which to begin validation. (The offset here is in pixels
992 * @y1_: offset from the top of the line pointed to by @anchor at
993 * which to end validation. (The offset here is in pixels
996 * Ensure that a region of a #GtkTextLayout is valid. The ::changed
997 * signal will be emitted if any lines are validated.
1000 gtk_text_layout_validate_yrange (GtkTextLayout *layout,
1001 GtkTextIter *anchor,
1006 GtkTextLine *first_line = NULL;
1007 GtkTextLine *last_line = NULL;
1009 gint delta_height = 0;
1010 gint first_line_y = 0; /* Quiet GCC */
1011 gint last_line_y = 0; /* Quiet GCC */
1013 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
1020 /* Validate backwards from the anchor line to y0
1022 line = _gtk_text_iter_get_text_line (anchor);
1023 line = _gtk_text_line_previous (line);
1025 while (line && seen < -y0)
1027 GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
1028 if (!line_data || !line_data->valid)
1030 gint old_height, new_height;
1032 old_height = line_data ? line_data->height : 0;
1034 _gtk_text_btree_validate_line (_gtk_text_buffer_get_btree (layout->buffer),
1036 line_data = _gtk_text_line_get_data (line, layout);
1038 new_height = line_data ? line_data->height : 0;
1040 delta_height += new_height - old_height;
1043 first_line_y = -seen - new_height;
1047 last_line_y = -seen;
1051 seen += line_data ? line_data->height : 0;
1052 line = _gtk_text_line_previous (line);
1055 /* Validate forwards to y1 */
1056 line = _gtk_text_iter_get_text_line (anchor);
1058 while (line && seen < y1)
1060 GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
1061 if (!line_data || !line_data->valid)
1063 gint old_height, new_height;
1065 old_height = line_data ? line_data->height : 0;
1067 _gtk_text_btree_validate_line (_gtk_text_buffer_get_btree (layout->buffer),
1069 line_data = _gtk_text_line_get_data (line, layout);
1070 new_height = line_data ? line_data->height : 0;
1072 delta_height += new_height - old_height;
1077 first_line_y = seen;
1080 last_line_y = seen + new_height;
1083 seen += line_data ? line_data->height : 0;
1084 line = _gtk_text_line_next_excluding_last (line);
1087 /* If we found and validated any invalid lines, update size and
1088 * emit the changed signal
1094 update_layout_size (layout);
1096 line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
1097 first_line, layout);
1099 gtk_text_layout_emit_changed (layout,
1101 last_line_y - first_line_y - delta_height,
1102 last_line_y - first_line_y);
1107 * gtk_text_layout_validate:
1108 * @tree: a #GtkTextLayout
1109 * @max_pixels: the maximum number of pixels to validate. (No more
1110 * than one paragraph beyond this limit will be validated)
1112 * Validate regions of a #GtkTextLayout. The ::changed signal will
1113 * be emitted for each region validated.
1116 gtk_text_layout_validate (GtkTextLayout *layout,
1119 gint y, old_height, new_height;
1121 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
1123 while (max_pixels > 0 &&
1124 _gtk_text_btree_validate (_gtk_text_buffer_get_btree (layout->buffer),
1126 &y, &old_height, &new_height))
1128 max_pixels -= new_height;
1130 update_layout_size (layout);
1131 gtk_text_layout_emit_changed (layout, y, old_height, new_height);
1135 static GtkTextLineData*
1136 gtk_text_layout_real_wrap (GtkTextLayout *layout,
1139 GtkTextLineData *line_data)
1141 GtkTextLineDisplay *display;
1143 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), NULL);
1144 g_return_val_if_fail (line != NULL, NULL);
1146 if (line_data == NULL)
1148 line_data = _gtk_text_line_data_new (layout, line);
1149 _gtk_text_line_add_data (line, line_data);
1152 display = gtk_text_layout_get_line_display (layout, line, TRUE);
1153 line_data->width = display->width;
1154 line_data->height = display->height;
1155 line_data->valid = TRUE;
1156 gtk_text_layout_free_line_display (layout, display);
1162 * Layout utility functions
1165 /* If you get the style with get_style () you need to call
1166 release_style () to free it. */
1167 static GtkTextAttributes*
1168 get_style (GtkTextLayout *layout,
1171 GtkTextAttributes *style;
1173 /* If we have the one-style cache, then it means
1174 that we haven't seen a toggle since we filled in the
1177 if (layout->one_style_cache != NULL)
1179 gtk_text_attributes_ref (layout->one_style_cache);
1180 return layout->one_style_cache;
1183 g_assert (layout->one_style_cache == NULL);
1185 /* No tags, use default style */
1186 if (tags == NULL || tags->len == 0)
1188 /* One ref for the return value, one ref for the
1189 layout->one_style_cache reference */
1190 gtk_text_attributes_ref (layout->default_style);
1191 gtk_text_attributes_ref (layout->default_style);
1192 layout->one_style_cache = layout->default_style;
1194 return layout->default_style;
1197 style = gtk_text_attributes_new ();
1199 gtk_text_attributes_copy_values (layout->default_style,
1202 _gtk_text_attributes_fill_from_tags (style,
1203 (GtkTextTag**) tags->pdata,
1206 g_assert (style->refcount == 1);
1208 /* Leave this style as the last one seen */
1209 g_assert (layout->one_style_cache == NULL);
1210 gtk_text_attributes_ref (style); /* ref held by layout->one_style_cache */
1211 layout->one_style_cache = style;
1213 /* Returning yet another refcount */
1218 release_style (GtkTextLayout *layout,
1219 GtkTextAttributes *style)
1221 g_return_if_fail (style != NULL);
1222 g_return_if_fail (style->refcount > 0);
1224 gtk_text_attributes_unref (style);
1231 /* This function tries to optimize the case where a line
1232 is completely invisible */
1234 totally_invisible_line (GtkTextLayout *layout,
1238 GtkTextLineSegment *seg;
1241 /* Check if the first char is visible, if so we are partially visible.
1242 * Note that we have to check this since we don't know the current
1243 * invisible/noninvisible toggle state; this function can use the whole btree
1246 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
1249 if (!_gtk_text_btree_char_is_invisible (iter))
1253 seg = line->segments;
1257 if (seg->byte_count > 0)
1258 bytes += seg->byte_count;
1260 /* Note that these two tests can cause us to bail out
1261 * when we shouldn't, because a higher-priority tag
1262 * may override these settings. However the important
1263 * thing is to only invisible really-invisible lines, rather
1264 * than to invisible all really-invisible lines.
1267 else if (seg->type == >k_text_toggle_on_type)
1269 invalidate_cached_style (layout);
1271 /* Bail out if an elision-unsetting tag begins */
1272 if (seg->body.toggle.info->tag->invisible_set &&
1273 !seg->body.toggle.info->tag->values->invisible)
1276 else if (seg->type == >k_text_toggle_off_type)
1278 invalidate_cached_style (layout);
1280 /* Bail out if an elision-setting tag ends */
1281 if (seg->body.toggle.info->tag->invisible_set &&
1282 seg->body.toggle.info->tag->values->invisible)
1289 if (seg != NULL) /* didn't reach line end */
1296 set_para_values (GtkTextLayout *layout,
1297 PangoDirection base_dir,
1298 GtkTextAttributes *style,
1299 GtkTextLineDisplay *display)
1301 PangoAlignment pango_align = PANGO_ALIGN_LEFT;
1302 PangoWrapMode pango_wrap = PANGO_WRAP_WORD;
1306 /* If no base direction was found, then use the style direction */
1307 case PANGO_DIRECTION_NEUTRAL :
1308 display->direction = style->direction;
1310 /* Override the base direction */
1311 if (display->direction == GTK_TEXT_DIR_RTL)
1312 base_dir = PANGO_DIRECTION_RTL;
1314 base_dir = PANGO_DIRECTION_LTR;
1317 case PANGO_DIRECTION_RTL :
1318 display->direction = GTK_TEXT_DIR_RTL;
1321 display->direction = GTK_TEXT_DIR_LTR;
1325 if (display->direction == GTK_TEXT_DIR_RTL)
1326 display->layout = pango_layout_new (layout->rtl_context);
1328 display->layout = pango_layout_new (layout->ltr_context);
1330 switch (style->justification)
1332 case GTK_JUSTIFY_LEFT:
1333 pango_align = (base_dir == PANGO_DIRECTION_LTR) ? PANGO_ALIGN_LEFT : PANGO_ALIGN_RIGHT;
1335 case GTK_JUSTIFY_RIGHT:
1336 pango_align = (base_dir == PANGO_DIRECTION_LTR) ? PANGO_ALIGN_RIGHT : PANGO_ALIGN_LEFT;
1338 case GTK_JUSTIFY_CENTER:
1339 pango_align = PANGO_ALIGN_CENTER;
1341 case GTK_JUSTIFY_FILL:
1342 pango_align = (base_dir == PANGO_DIRECTION_LTR) ? PANGO_ALIGN_LEFT : PANGO_ALIGN_RIGHT;
1343 pango_layout_set_justify (display->layout, TRUE);
1346 g_assert_not_reached ();
1350 pango_layout_set_alignment (display->layout, pango_align);
1351 pango_layout_set_spacing (display->layout,
1352 style->pixels_inside_wrap * PANGO_SCALE);
1355 pango_layout_set_tabs (display->layout, style->tabs);
1357 display->top_margin = style->pixels_above_lines;
1358 display->height = style->pixels_above_lines + style->pixels_below_lines;
1359 display->bottom_margin = style->pixels_below_lines;
1360 display->left_margin = style->left_margin;
1361 display->right_margin = style->right_margin;
1363 display->x_offset = display->left_margin;
1365 pango_layout_set_indent (display->layout,
1366 style->indent * PANGO_SCALE);
1368 switch (style->wrap_mode)
1371 pango_wrap = PANGO_WRAP_CHAR;
1374 pango_wrap = PANGO_WRAP_WORD;
1377 case GTK_WRAP_WORD_CHAR:
1378 pango_wrap = PANGO_WRAP_WORD_CHAR;
1385 if (style->wrap_mode != GTK_WRAP_NONE)
1387 int layout_width = (layout->screen_width - display->left_margin - display->right_margin);
1388 pango_layout_set_width (display->layout, layout_width * PANGO_SCALE);
1389 pango_layout_set_wrap (display->layout, pango_wrap);
1392 display->total_width = MAX (layout->screen_width, layout->width) - display->left_margin - display->right_margin;
1394 if (style->pg_bg_color)
1395 display->pg_bg_color = gdk_color_copy (style->pg_bg_color);
1397 display->pg_bg_color = NULL;
1400 static PangoAttribute *
1401 gtk_text_attr_appearance_copy (const PangoAttribute *attr)
1403 const GtkTextAttrAppearance *appearance_attr = (const GtkTextAttrAppearance *)attr;
1405 return gtk_text_attr_appearance_new (&appearance_attr->appearance);
1409 gtk_text_attr_appearance_destroy (PangoAttribute *attr)
1411 GtkTextAttrAppearance *appearance_attr = (GtkTextAttrAppearance *)attr;
1413 if (appearance_attr->appearance.bg_stipple)
1414 g_object_unref (appearance_attr->appearance.bg_stipple);
1415 if (appearance_attr->appearance.fg_stipple)
1416 g_object_unref (appearance_attr->appearance.fg_stipple);
1418 g_slice_free (GtkTextAttrAppearance, appearance_attr);
1422 gtk_text_attr_appearance_compare (const PangoAttribute *attr1,
1423 const PangoAttribute *attr2)
1425 const GtkTextAppearance *appearance1 = &((const GtkTextAttrAppearance *)attr1)->appearance;
1426 const GtkTextAppearance *appearance2 = &((const GtkTextAttrAppearance *)attr2)->appearance;
1428 return (gdk_color_equal (&appearance1->fg_color, &appearance2->fg_color) &&
1429 gdk_color_equal (&appearance1->bg_color, &appearance2->bg_color) &&
1430 appearance1->fg_stipple == appearance2->fg_stipple &&
1431 appearance1->bg_stipple == appearance2->bg_stipple &&
1432 appearance1->underline == appearance2->underline &&
1433 appearance1->strikethrough == appearance2->strikethrough &&
1434 appearance1->draw_bg == appearance2->draw_bg);
1439 * gtk_text_attr_appearance_new:
1442 * Create a new font description attribute. (This attribute
1443 * allows setting family, style, weight, variant, stretch,
1444 * and size simultaneously.)
1448 static PangoAttribute *
1449 gtk_text_attr_appearance_new (const GtkTextAppearance *appearance)
1451 static PangoAttrClass klass = {
1453 gtk_text_attr_appearance_copy,
1454 gtk_text_attr_appearance_destroy,
1455 gtk_text_attr_appearance_compare
1458 GtkTextAttrAppearance *result;
1461 klass.type = gtk_text_attr_appearance_type =
1462 pango_attr_type_register ("GtkTextAttrAppearance");
1464 result = g_slice_new (GtkTextAttrAppearance);
1465 result->attr.klass = &klass;
1467 result->appearance = *appearance;
1469 if (appearance->bg_stipple)
1470 g_object_ref (appearance->bg_stipple);
1471 if (appearance->fg_stipple)
1472 g_object_ref (appearance->fg_stipple);
1474 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 GSList *shaped = display->shaped_objects;
1811 PangoLayout *layout = display->layout;
1812 PangoLayoutIter *iter;
1814 iter = pango_layout_get_iter (layout);
1818 PangoLayoutRun *run = pango_layout_iter_get_run_readonly (iter);
1820 if (run && is_shape (run))
1822 GObject *shaped_object = shaped->data;
1823 shaped = shaped->next;
1825 /* shaped_object is NULL for child anchors with no
1826 * widgets stored at them
1828 if (shaped_object && GTK_IS_WIDGET (shaped_object))
1830 PangoRectangle extents;
1832 /* We emit "allocate_child" with the x,y of
1833 * the widget with respect to the top of the line
1834 * and the left side of the buffer
1837 pango_layout_iter_get_run_extents (iter,
1841 g_signal_emit (text_layout,
1842 signals[ALLOCATE_CHILD],
1845 PANGO_PIXELS (extents.x) + display->x_offset,
1846 PANGO_PIXELS (extents.y) + display->top_margin);
1850 while (pango_layout_iter_next_run (iter));
1852 pango_layout_iter_free (iter);
1856 convert_color (GdkColor *result,
1857 PangoAttrColor *attr)
1859 result->red = attr->color.red;
1860 result->blue = attr->color.blue;
1861 result->green = attr->color.green;
1864 /* This function is used to convert the preedit string attributes, which are
1865 * standard PangoAttributes, into the custom attributes used by the text
1866 * widget and insert them into a attr list with a given offset.
1869 add_preedit_attrs (GtkTextLayout *layout,
1870 GtkTextAttributes *style,
1871 PangoAttrList *attrs,
1875 PangoAttrIterator *iter = pango_attr_list_get_iterator (layout->preedit_attrs);
1879 GtkTextAppearance appearance = style->appearance;
1880 PangoFontDescription *font_desc = pango_font_description_copy_static (style->font);
1881 PangoAttribute *insert_attr;
1882 GSList *extra_attrs = NULL;
1884 PangoLanguage *language;
1887 pango_attr_iterator_range (iter, &start, &end);
1889 if (end == G_MAXINT)
1890 end = layout->preedit_len;
1895 pango_attr_iterator_get_font (iter, font_desc, &language, &extra_attrs);
1897 tmp_list = extra_attrs;
1900 PangoAttribute *attr = tmp_list->data;
1902 switch (attr->klass->type)
1904 case PANGO_ATTR_FOREGROUND:
1905 convert_color (&appearance.fg_color, (PangoAttrColor *)attr);
1907 case PANGO_ATTR_BACKGROUND:
1908 convert_color (&appearance.bg_color, (PangoAttrColor *)attr);
1909 appearance.draw_bg = TRUE;
1911 case PANGO_ATTR_UNDERLINE:
1912 appearance.underline = ((PangoAttrInt *)attr)->value;
1914 case PANGO_ATTR_STRIKETHROUGH:
1915 appearance.strikethrough = ((PangoAttrInt *)attr)->value;
1917 case PANGO_ATTR_RISE:
1918 appearance.rise = ((PangoAttrInt *)attr)->value;
1924 pango_attribute_destroy (attr);
1925 tmp_list = tmp_list->next;
1928 g_slist_free (extra_attrs);
1930 insert_attr = pango_attr_font_desc_new (font_desc);
1931 insert_attr->start_index = start + offset;
1932 insert_attr->end_index = end + offset;
1934 pango_attr_list_insert (attrs, insert_attr);
1938 insert_attr = pango_attr_language_new (language);
1939 insert_attr->start_index = start + offset;
1940 insert_attr->end_index = end + offset;
1942 pango_attr_list_insert (attrs, insert_attr);
1945 add_generic_attrs (layout, &appearance, end - start,
1946 attrs, start + offset,
1949 pango_font_description_free (font_desc);
1951 while (pango_attr_iterator_next (iter));
1953 pango_attr_iterator_destroy (iter);
1956 /* Iterate over the line and fill in display->cursors.
1957 * It's a stripped copy of gtk_text_layout_get_line_display() */
1959 update_text_display_cursors (GtkTextLayout *layout,
1961 GtkTextLineDisplay *display)
1963 GtkTextLineSegment *seg;
1965 gint layout_byte_offset, buffer_byte_offset;
1966 GSList *cursor_byte_offsets = NULL;
1967 GSList *cursor_segs = NULL;
1968 GSList *tmp_list1, *tmp_list2;
1970 if (!display->cursors_invalid)
1973 display->cursors_invalid = FALSE;
1975 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
1978 /* Special-case optimization for completely
1979 * invisible lines; makes it faster to deal
1980 * with sequences of invisible lines.
1982 if (totally_invisible_line (layout, line, &iter))
1985 /* Iterate over segments */
1986 layout_byte_offset = 0; /* position in the layout text (includes preedit, does not include invisible text) */
1987 buffer_byte_offset = 0; /* position in the buffer line */
1988 seg = _gtk_text_iter_get_any_segment (&iter);
1991 /* Displayable segments */
1992 if (seg->type == >k_text_char_type ||
1993 seg->type == >k_text_pixbuf_type ||
1994 seg->type == >k_text_child_type)
1996 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
1998 buffer_byte_offset);
2000 if (!_gtk_text_btree_char_is_invisible (&iter))
2001 layout_byte_offset += seg->byte_count;
2003 buffer_byte_offset += seg->byte_count;
2007 else if (seg->type == >k_text_right_mark_type ||
2008 seg->type == >k_text_left_mark_type)
2010 gint cursor_offset = 0;
2012 /* At the insertion point, add the preedit string, if any */
2014 if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
2015 seg->body.mark.obj))
2017 display->insert_index = layout_byte_offset;
2019 if (layout->preedit_len > 0)
2021 layout_byte_offset += layout->preedit_len;
2022 /* DO NOT increment the buffer byte offset for preedit */
2023 cursor_offset = layout->preedit_cursor - layout->preedit_len;
2027 /* Display visible marks */
2029 if (seg->body.mark.visible)
2031 cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets,
2032 GINT_TO_POINTER (layout_byte_offset + cursor_offset));
2033 cursor_segs = g_slist_prepend (cursor_segs, seg);
2038 else if (seg->type == >k_text_toggle_on_type ||
2039 seg->type == >k_text_toggle_off_type)
2044 g_error ("Unknown segment type: %s", seg->type->name);
2049 tmp_list1 = cursor_byte_offsets;
2050 tmp_list2 = cursor_segs;
2053 add_cursor (layout, display, tmp_list2->data,
2054 GPOINTER_TO_INT (tmp_list1->data));
2055 tmp_list1 = tmp_list1->next;
2056 tmp_list2 = tmp_list2->next;
2058 g_slist_free (cursor_byte_offsets);
2059 g_slist_free (cursor_segs);
2062 /* Same as _gtk_text_btree_get_tags(), except it returns GPtrArray,
2063 * to be used in gtk_text_layout_get_line_display(). */
2065 get_tags_array_at_iter (GtkTextIter *iter)
2068 GPtrArray *array = NULL;
2071 tags = _gtk_text_btree_get_tags (iter, &n_tags);
2075 /* Sort tags in ascending order of priority */
2076 _gtk_text_tag_array_sort (tags, n_tags);
2077 array = g_ptr_array_sized_new (n_tags);
2078 g_ptr_array_set_size (array, n_tags);
2079 memcpy (array->pdata, tags, n_tags * sizeof (GtkTextTag*));
2086 /* Add the tag to the array if it's not there already, and remove
2087 * it otherwise. It keeps the array sorted by tags priority. */
2089 tags_array_toggle_tag (GPtrArray *array,
2096 array = g_ptr_array_new ();
2098 tags = (GtkTextTag**) array->pdata;
2100 for (pos = 0; pos < array->len && tags[pos]->priority < tag->priority; pos++) ;
2102 if (pos < array->len && tags[pos] == tag)
2103 g_ptr_array_remove_index (array, pos);
2106 g_ptr_array_set_size (array, array->len + 1);
2107 if (pos < array->len - 1)
2108 memmove (array->pdata + pos + 1, array->pdata + pos,
2109 (array->len - pos - 1) * sizeof (GtkTextTag*));
2110 array->pdata[pos] = tag;
2116 GtkTextLineDisplay *
2117 gtk_text_layout_get_line_display (GtkTextLayout *layout,
2121 GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout);
2122 GtkTextLineDisplay *display;
2123 GtkTextLineSegment *seg;
2125 GtkTextAttributes *style;
2127 PangoAttrList *attrs;
2128 gint text_allocated, layout_byte_offset, buffer_byte_offset;
2129 PangoRectangle extents;
2130 gboolean para_values_set = FALSE;
2131 GSList *cursor_byte_offsets = NULL;
2132 GSList *cursor_segs = NULL;
2133 GSList *tmp_list1, *tmp_list2;
2134 gboolean saw_widget = FALSE;
2135 PangoDirection base_dir;
2137 gboolean initial_toggle_segments;
2139 g_return_val_if_fail (line != NULL, NULL);
2141 if (layout->one_display_cache)
2143 if (line == layout->one_display_cache->line &&
2144 (size_only || !layout->one_display_cache->size_only))
2147 update_text_display_cursors (layout, line, layout->one_display_cache);
2148 return layout->one_display_cache;
2152 GtkTextLineDisplay *tmp_display = layout->one_display_cache;
2153 layout->one_display_cache = NULL;
2154 gtk_text_layout_free_line_display (layout, tmp_display);
2158 DV (g_print ("creating one line display cache (%s)\n", G_STRLOC));
2160 display = g_new0 (GtkTextLineDisplay, 1);
2162 display->size_only = size_only;
2163 display->line = line;
2164 display->insert_index = -1;
2166 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2169 /* Special-case optimization for completely
2170 * invisible lines; makes it faster to deal
2171 * with sequences of invisible lines.
2173 if (totally_invisible_line (layout, line, &iter))
2175 if (display->direction == GTK_TEXT_DIR_RTL)
2176 display->layout = pango_layout_new (layout->rtl_context);
2178 display->layout = pango_layout_new (layout->ltr_context);
2183 /* Find the bidi base direction */
2184 base_dir = line->dir_propagated_forward;
2185 if (base_dir == PANGO_DIRECTION_NEUTRAL)
2186 base_dir = line->dir_propagated_back;
2188 if (line == priv->cursor_line &&
2189 line->dir_strong == PANGO_DIRECTION_NEUTRAL)
2191 base_dir = (layout->keyboard_direction == GTK_TEXT_DIR_LTR) ?
2192 PANGO_DIRECTION_LTR : PANGO_DIRECTION_RTL;
2195 /* Allocate space for flat text for buffer
2197 text_allocated = _gtk_text_line_byte_count (line);
2198 text = g_malloc (text_allocated);
2200 attrs = pango_attr_list_new ();
2202 /* Iterate over segments, creating display chunks for them, and updating the tags array. */
2203 layout_byte_offset = 0; /* current length of layout text (includes preedit, does not include invisible text) */
2204 buffer_byte_offset = 0; /* position in the buffer line */
2205 seg = _gtk_text_iter_get_any_segment (&iter);
2206 tags = get_tags_array_at_iter (&iter);
2207 initial_toggle_segments = TRUE;
2210 /* Displayable segments */
2211 if (seg->type == >k_text_char_type ||
2212 seg->type == >k_text_pixbuf_type ||
2213 seg->type == >k_text_child_type)
2215 style = get_style (layout, tags);
2216 initial_toggle_segments = FALSE;
2218 /* We have to delay setting the paragraph values until we
2219 * hit the first pixbuf or text segment because toggles at
2220 * the beginning of the paragraph should affect the
2221 * paragraph-global values
2223 if (!para_values_set)
2225 set_para_values (layout, base_dir, style, display);
2226 para_values_set = TRUE;
2229 /* First see if the chunk is invisible, and ignore it if so. Tk
2230 * looked at tabs, wrap mode, etc. before doing this, but
2231 * that made no sense to me, so I am just skipping the
2234 if (!style->invisible)
2236 if (seg->type == >k_text_char_type)
2238 /* We don't want to split segments because of marks,
2239 * so we scan forward for more segments only
2240 * separated from us by marks. In theory, we should
2241 * also merge segments with identical styles, even
2242 * if there are toggles in-between
2246 GtkTextLineSegment *prev_seg = NULL;
2250 if (seg->type == >k_text_char_type)
2252 memcpy (text + layout_byte_offset, seg->body.chars, seg->byte_count);
2253 layout_byte_offset += seg->byte_count;
2254 buffer_byte_offset += seg->byte_count;
2255 bytes += seg->byte_count;
2257 else if (seg->type == >k_text_right_mark_type ||
2258 seg->type == >k_text_left_mark_type)
2260 /* If we have preedit string, break out of this loop - we'll almost
2261 * certainly have different attributes on the preedit string
2264 if (layout->preedit_len > 0 &&
2265 _gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
2266 seg->body.mark.obj))
2269 if (seg->body.mark.visible)
2271 cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets, GINT_TO_POINTER (layout_byte_offset));
2272 cursor_segs = g_slist_prepend (cursor_segs, seg);
2273 if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
2274 seg->body.mark.obj))
2275 display->insert_index = layout_byte_offset;
2285 seg = prev_seg; /* Back up one */
2286 add_generic_attrs (layout, &style->appearance,
2288 attrs, layout_byte_offset - bytes,
2290 add_text_attrs (layout, style, bytes, attrs,
2291 layout_byte_offset - bytes, size_only);
2293 else if (seg->type == >k_text_pixbuf_type)
2295 add_generic_attrs (layout,
2298 attrs, layout_byte_offset,
2300 add_pixbuf_attrs (layout, display, style,
2301 seg, attrs, layout_byte_offset);
2302 memcpy (text + layout_byte_offset, gtk_text_unknown_char_utf8,
2304 layout_byte_offset += seg->byte_count;
2305 buffer_byte_offset += seg->byte_count;
2307 else if (seg->type == >k_text_child_type)
2311 add_generic_attrs (layout, &style->appearance,
2313 attrs, layout_byte_offset,
2315 add_child_attrs (layout, display, style,
2316 seg, attrs, layout_byte_offset);
2317 memcpy (text + layout_byte_offset, gtk_text_unknown_char_utf8,
2319 layout_byte_offset += seg->byte_count;
2320 buffer_byte_offset += seg->byte_count;
2324 /* We don't know this segment type */
2325 g_assert_not_reached ();
2328 } /* if (segment was visible) */
2331 /* Invisible segment */
2332 buffer_byte_offset += seg->byte_count;
2335 release_style (layout, style);
2339 else if (seg->type == >k_text_toggle_on_type ||
2340 seg->type == >k_text_toggle_off_type)
2342 /* Style may have changed, drop our
2343 current cached style */
2344 invalidate_cached_style (layout);
2345 /* Add the tag only after we have seen some non-toggle non-mark segment,
2346 * otherwise the tag is already accounted for by _gtk_text_btree_get_tags(). */
2347 if (!initial_toggle_segments)
2348 tags = tags_array_toggle_tag (tags, seg->body.toggle.info->tag);
2352 else if (seg->type == >k_text_right_mark_type ||
2353 seg->type == >k_text_left_mark_type)
2355 gint cursor_offset = 0;
2357 /* At the insertion point, add the preedit string, if any */
2359 if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
2360 seg->body.mark.obj))
2362 display->insert_index = layout_byte_offset;
2364 if (layout->preedit_len > 0)
2366 text_allocated += layout->preedit_len;
2367 text = g_realloc (text, text_allocated);
2369 style = get_style (layout, tags);
2370 add_preedit_attrs (layout, style, attrs, layout_byte_offset, size_only);
2371 release_style (layout, style);
2373 memcpy (text + layout_byte_offset, layout->preedit_string, layout->preedit_len);
2374 layout_byte_offset += layout->preedit_len;
2375 /* DO NOT increment the buffer byte offset for preedit */
2377 cursor_offset = layout->preedit_cursor - layout->preedit_len;
2382 /* Display visible marks */
2384 if (seg->body.mark.visible)
2386 cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets,
2387 GINT_TO_POINTER (layout_byte_offset + cursor_offset));
2388 cursor_segs = g_slist_prepend (cursor_segs, seg);
2393 g_error ("Unknown segment type: %s", seg->type->name);
2398 if (!para_values_set)
2400 style = get_style (layout, tags);
2401 set_para_values (layout, base_dir, style, display);
2402 release_style (layout, style);
2405 /* Pango doesn't want the trailing paragraph delimiters */
2408 /* Only one character has type G_UNICODE_PARAGRAPH_SEPARATOR in
2409 * Unicode 3.0; update this if that changes.
2411 #define PARAGRAPH_SEPARATOR 0x2029
2414 if (layout_byte_offset > 0)
2416 const char *prev = g_utf8_prev_char (text + layout_byte_offset);
2417 ch = g_utf8_get_char (prev);
2418 if (ch == PARAGRAPH_SEPARATOR || ch == '\r' || ch == '\n')
2419 layout_byte_offset = prev - text; /* chop off */
2421 if (ch == '\n' && layout_byte_offset > 0)
2423 /* Possibly chop a CR as well */
2424 prev = g_utf8_prev_char (text + layout_byte_offset);
2426 --layout_byte_offset;
2431 pango_layout_set_text (display->layout, text, layout_byte_offset);
2432 pango_layout_set_attributes (display->layout, attrs);
2434 tmp_list1 = cursor_byte_offsets;
2435 tmp_list2 = cursor_segs;
2438 add_cursor (layout, display, tmp_list2->data,
2439 GPOINTER_TO_INT (tmp_list1->data));
2440 tmp_list1 = tmp_list1->next;
2441 tmp_list2 = tmp_list2->next;
2443 g_slist_free (cursor_byte_offsets);
2444 g_slist_free (cursor_segs);
2446 pango_layout_get_extents (display->layout, NULL, &extents);
2448 display->width = PIXEL_BOUND (extents.width) + display->left_margin + display->right_margin;
2449 display->height += PANGO_PIXELS (extents.height);
2451 /* If we aren't wrapping, we need to do the alignment of each
2452 * paragraph ourselves.
2454 if (pango_layout_get_width (display->layout) < 0)
2456 gint excess = display->total_width - display->width;
2458 switch (pango_layout_get_alignment (display->layout))
2460 case PANGO_ALIGN_LEFT:
2462 case PANGO_ALIGN_CENTER:
2463 display->x_offset += excess / 2;
2465 case PANGO_ALIGN_RIGHT:
2466 display->x_offset += excess;
2471 /* Free this if we aren't in a loop */
2472 if (layout->wrap_loop_count == 0)
2473 invalidate_cached_style (layout);
2476 pango_attr_list_unref (attrs);
2478 g_ptr_array_free (tags, TRUE);
2480 layout->one_display_cache = display;
2483 allocate_child_widgets (layout, display);
2489 gtk_text_layout_free_line_display (GtkTextLayout *layout,
2490 GtkTextLineDisplay *display)
2492 if (display != layout->one_display_cache)
2494 if (display->layout)
2495 g_object_unref (display->layout);
2497 if (display->cursors)
2499 g_slist_foreach (display->cursors, (GFunc)g_free, NULL);
2500 g_slist_free (display->cursors);
2502 g_slist_free (display->shaped_objects);
2504 if (display->pg_bg_color)
2505 gdk_color_free (display->pg_bg_color);
2511 /* Functions to convert iter <=> index for the line of a GtkTextLineDisplay
2512 * taking into account the preedit string and invisible text if necessary.
2515 line_display_iter_to_index (GtkTextLayout *layout,
2516 GtkTextLineDisplay *display,
2517 const GtkTextIter *iter)
2521 g_return_val_if_fail (_gtk_text_iter_get_text_line (iter) == display->line, 0);
2523 index = gtk_text_iter_get_visible_line_index (iter);
2525 if (layout->preedit_len > 0 && display->insert_index >= 0)
2527 if (index >= display->insert_index)
2528 index += layout->preedit_len;
2535 line_display_index_to_iter (GtkTextLayout *layout,
2536 GtkTextLineDisplay *display,
2541 g_return_if_fail (!_gtk_text_line_is_last (display->line,
2542 _gtk_text_buffer_get_btree (layout->buffer)));
2544 if (layout->preedit_len > 0 && display->insert_index >= 0)
2546 if (index >= display->insert_index + layout->preedit_len)
2547 index -= layout->preedit_len;
2548 else if (index > display->insert_index)
2550 index = display->insert_index;
2555 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2556 iter, display->line, 0);
2558 gtk_text_iter_set_visible_line_index (iter, index);
2560 if (_gtk_text_iter_get_text_line (iter) != display->line)
2562 /* Clamp to end of line - really this clamping should have been done
2563 * before here, maybe in Pango, this is a broken band-aid I think
2565 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2566 iter, display->line, 0);
2568 if (!gtk_text_iter_ends_line (iter))
2569 gtk_text_iter_forward_to_line_end (iter);
2572 gtk_text_iter_forward_chars (iter, trailing);
2576 get_line_at_y (GtkTextLayout *layout,
2583 if (y > layout->height)
2586 *line = _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
2587 layout, y, line_top);
2590 *line = _gtk_text_btree_get_end_iter_line (_gtk_text_buffer_get_btree (layout->buffer));
2594 _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2600 * gtk_text_layout_get_line_at_y:
2601 * @layout: a #GtkLayout
2602 * @target_iter: the iterator in which the result is stored
2603 * @y: the y positition
2604 * @line_top: location to store the y coordinate of the
2605 * top of the line. (Can by %NULL.)
2607 * Get the iter at the beginning of the line which is displayed
2611 gtk_text_layout_get_line_at_y (GtkTextLayout *layout,
2612 GtkTextIter *target_iter,
2618 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2619 g_return_if_fail (target_iter != NULL);
2621 get_line_at_y (layout, y, &line, line_top);
2622 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2623 target_iter, line, 0);
2627 gtk_text_layout_get_iter_at_pixel (GtkTextLayout *layout,
2628 GtkTextIter *target_iter,
2634 gtk_text_layout_get_iter_at_position (layout, target_iter, &trailing, x, y);
2636 gtk_text_iter_forward_chars (target_iter, trailing);
2639 void gtk_text_layout_get_iter_at_position (GtkTextLayout *layout,
2640 GtkTextIter *target_iter,
2648 GtkTextLineDisplay *display;
2650 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2651 g_return_if_fail (target_iter != NULL);
2653 get_line_at_y (layout, y, &line, &line_top);
2655 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2657 x -= display->x_offset;
2658 y -= line_top + display->top_margin;
2660 /* If we are below the layout, position the cursor at the last character
2663 if (y > display->height - display->top_margin - display->bottom_margin)
2665 byte_index = _gtk_text_line_byte_count (line);
2670 /* Ignore the "outside" return value from pango. Pango is doing
2671 * the right thing even if we are outside the layout in the
2674 pango_layout_xy_to_index (display->layout, x * PANGO_SCALE, y * PANGO_SCALE,
2675 &byte_index, trailing);
2678 line_display_index_to_iter (layout, display, target_iter, byte_index, 0);
2680 gtk_text_layout_free_line_display (layout, display);
2685 * gtk_text_layout_get_cursor_locations:
2686 * @layout: a #GtkTextLayout
2687 * @iter: a #GtkTextIter
2688 * @strong_pos: location to store the strong cursor position (may be %NULL)
2689 * @weak_pos: location to store the weak cursor position (may be %NULL)
2691 * Given an iterator within a text layout, determine the positions of the
2692 * strong and weak cursors if the insertion point is at that
2693 * iterator. The position of each cursor is stored as a zero-width
2694 * rectangle. The strong cursor location is the location where
2695 * characters of the directionality equal to the base direction of the
2696 * paragraph are inserted. The weak cursor location is the location
2697 * where characters of the directionality opposite to the base
2698 * direction of the paragraph are inserted.
2701 gtk_text_layout_get_cursor_locations (GtkTextLayout *layout,
2703 GdkRectangle *strong_pos,
2704 GdkRectangle *weak_pos)
2707 GtkTextLineDisplay *display;
2710 GtkTextIter insert_iter;
2712 PangoRectangle pango_strong_pos;
2713 PangoRectangle pango_weak_pos;
2715 g_return_if_fail (layout != NULL);
2716 g_return_if_fail (iter != NULL);
2718 line = _gtk_text_iter_get_text_line (iter);
2719 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2720 index = line_display_iter_to_index (layout, display, iter);
2722 line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2725 gtk_text_buffer_get_iter_at_mark (layout->buffer, &insert_iter,
2726 gtk_text_buffer_get_mark (layout->buffer,
2729 if (gtk_text_iter_equal (iter, &insert_iter))
2730 index += layout->preedit_cursor - layout->preedit_len;
2732 pango_layout_get_cursor_pos (display->layout, index,
2733 strong_pos ? &pango_strong_pos : NULL,
2734 weak_pos ? &pango_weak_pos : NULL);
2738 strong_pos->x = display->x_offset + pango_strong_pos.x / PANGO_SCALE;
2739 strong_pos->y = line_top + display->top_margin + pango_strong_pos.y / PANGO_SCALE;
2740 strong_pos->width = 0;
2741 strong_pos->height = pango_strong_pos.height / PANGO_SCALE;
2746 weak_pos->x = display->x_offset + pango_weak_pos.x / PANGO_SCALE;
2747 weak_pos->y = line_top + display->top_margin + pango_weak_pos.y / PANGO_SCALE;
2748 weak_pos->width = 0;
2749 weak_pos->height = pango_weak_pos.height / PANGO_SCALE;
2752 gtk_text_layout_free_line_display (layout, display);
2756 * _gtk_text_layout_get_block_cursor:
2757 * @layout: a #GtkTextLayout
2758 * @pos: a #GdkRectangle to store block cursor position
2760 * If layout is to display a block cursor, calculates its position
2761 * and returns %TRUE. Otherwise it returns %FALSE. In case when
2762 * cursor is visible, it simply returns the position stored in
2763 * the line display, otherwise it has to compute the position
2764 * (see get_block_cursor()).
2767 _gtk_text_layout_get_block_cursor (GtkTextLayout *layout,
2771 GtkTextLineDisplay *display;
2774 gboolean block = FALSE;
2776 g_return_val_if_fail (layout != NULL, FALSE);
2778 gtk_text_buffer_get_iter_at_mark (layout->buffer, &iter,
2779 gtk_text_buffer_get_insert (layout->buffer));
2780 line = _gtk_text_iter_get_text_line (&iter);
2781 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2783 if (display->has_block_cursor)
2786 rect = display->block_cursor;
2790 gint index = display->insert_index;
2793 index = gtk_text_iter_get_line_index (&iter);
2795 if (get_block_cursor (layout, display, &iter, index, &rect, NULL))
2803 line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2807 pos->x += display->x_offset;
2808 pos->y += line_top + display->top_margin;
2811 gtk_text_layout_free_line_display (layout, display);
2816 * gtk_text_layout_get_line_yrange:
2817 * @layout: a #GtkTextLayout
2818 * @iter: a #GtkTextIter
2819 * @y: location to store the top of the paragraph in pixels,
2821 * @height location to store the height of the paragraph in pixels,
2824 * Find the range of y coordinates for the paragraph containing
2828 gtk_text_layout_get_line_yrange (GtkTextLayout *layout,
2829 const GtkTextIter *iter,
2835 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2836 g_return_if_fail (_gtk_text_iter_get_btree (iter) == _gtk_text_buffer_get_btree (layout->buffer));
2838 line = _gtk_text_iter_get_text_line (iter);
2841 *y = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2845 GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
2847 *height = line_data->height;
2854 * _gtk_text_layout_get_line_xrange:
2855 * @layout: a #GtkTextLayout
2856 * @iter: a #GtkTextIter
2857 * @x: location to store the top of the paragraph in pixels,
2859 * @width location to store the height of the paragraph in pixels,
2862 * Find the range of X coordinates for the paragraph containing
2863 * the given iter. Private for 2.0 due to API freeze, could
2864 * be made public for 2.2.
2867 _gtk_text_layout_get_line_xrange (GtkTextLayout *layout,
2868 const GtkTextIter *iter,
2874 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2875 g_return_if_fail (_gtk_text_iter_get_btree (iter) == _gtk_text_buffer_get_btree (layout->buffer));
2877 line = _gtk_text_iter_get_text_line (iter);
2880 *x = 0; /* FIXME This is wrong; should represent the first available cursor position */
2884 GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
2886 *width = line_data->width;
2893 gtk_text_layout_get_iter_location (GtkTextLayout *layout,
2894 const GtkTextIter *iter,
2897 PangoRectangle pango_rect;
2900 GtkTextLineDisplay *display;
2904 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2905 g_return_if_fail (_gtk_text_iter_get_btree (iter) == _gtk_text_buffer_get_btree (layout->buffer));
2906 g_return_if_fail (rect != NULL);
2908 tree = _gtk_text_iter_get_btree (iter);
2909 line = _gtk_text_iter_get_text_line (iter);
2911 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2913 rect->y = _gtk_text_btree_find_line_top (tree, line, layout);
2915 x_offset = display->x_offset * PANGO_SCALE;
2917 byte_index = gtk_text_iter_get_line_index (iter);
2919 pango_layout_index_to_pos (display->layout, byte_index, &pango_rect);
2921 rect->x = PANGO_PIXELS (x_offset + pango_rect.x);
2922 rect->y += PANGO_PIXELS (pango_rect.y) + display->top_margin;
2923 rect->width = PANGO_PIXELS (pango_rect.width);
2924 rect->height = PANGO_PIXELS (pango_rect.height);
2926 gtk_text_layout_free_line_display (layout, display);
2931 /* Find the iter for the logical beginning of the first display line whose
2932 * top y is >= y. If none exists, move the iter to the logical beginning
2933 * of the last line in the buffer.
2936 find_display_line_below (GtkTextLayout *layout,
2940 GtkTextLine *line, *next;
2941 GtkTextLine *found_line = NULL;
2943 gint found_byte = 0;
2945 line = _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
2946 layout, y, &line_top);
2950 _gtk_text_btree_get_end_iter_line (_gtk_text_buffer_get_btree (layout->buffer));
2953 _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2957 while (line && !found_line)
2959 GtkTextLineDisplay *display = gtk_text_layout_get_line_display (layout, line, FALSE);
2960 PangoLayoutIter *layout_iter;
2962 layout_iter = pango_layout_get_iter (display->layout);
2964 line_top += display->top_margin;
2968 gint first_y, last_y;
2969 PangoLayoutLine *layout_line = pango_layout_iter_get_line_readonly (layout_iter);
2971 found_byte = layout_line->start_index;
2979 pango_layout_iter_get_line_yrange (layout_iter, &first_y, &last_y);
2980 line_top += (last_y - first_y) / PANGO_SCALE;
2982 while (pango_layout_iter_next_line (layout_iter));
2984 pango_layout_iter_free (layout_iter);
2986 line_top += display->bottom_margin;
2987 gtk_text_layout_free_line_display (layout, display);
2989 next = _gtk_text_line_next_excluding_last (line);
2996 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2997 iter, found_line, found_byte);
3000 /* Find the iter for the logical beginning of the last display line whose
3001 * top y is >= y. If none exists, move the iter to the logical beginning
3002 * of the first line in the buffer.
3005 find_display_line_above (GtkTextLayout *layout,
3010 GtkTextLine *found_line = NULL;
3012 gint found_byte = 0;
3014 line = _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer), layout, y, &line_top);
3017 line = _gtk_text_btree_get_end_iter_line (_gtk_text_buffer_get_btree (layout->buffer));
3019 line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer), line, layout);
3022 while (line && !found_line)
3024 GtkTextLineDisplay *display = gtk_text_layout_get_line_display (layout, line, FALSE);
3025 PangoRectangle logical_rect;
3026 PangoLayoutIter *layout_iter;
3029 layout_iter = pango_layout_get_iter (display->layout);
3031 line_top -= display->top_margin + display->bottom_margin;
3032 pango_layout_iter_get_layout_extents (layout_iter, NULL, &logical_rect);
3033 line_top -= logical_rect.height / PANGO_SCALE;
3035 tmp_top = line_top + display->top_margin;
3039 gint first_y, last_y;
3040 PangoLayoutLine *layout_line = pango_layout_iter_get_line_readonly (layout_iter);
3042 found_byte = layout_line->start_index;
3044 pango_layout_iter_get_line_yrange (layout_iter, &first_y, &last_y);
3046 tmp_top -= (last_y - first_y) / PANGO_SCALE;
3051 pango_layout_iter_free (layout_iter);
3055 while (pango_layout_iter_next_line (layout_iter));
3057 pango_layout_iter_free (layout_iter);
3059 gtk_text_layout_free_line_display (layout, display);
3061 line = _gtk_text_line_previous (line);
3067 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
3068 iter, found_line, found_byte);
3070 gtk_text_buffer_get_iter_at_offset (layout->buffer, iter, 0);
3074 * gtk_text_layout_clamp_iter_to_vrange:
3075 * @layout: a #GtkTextLayout
3076 * @iter: a #GtkTextIter
3077 * @top: the top of the range
3078 * @bottom: the bottom the range
3080 * If the iterator is not fully in the range @top <= y < @bottom,
3081 * then, if possible, move it the minimum distance so that the
3082 * iterator in this range.
3084 * Returns: %TRUE if the iterator was moved, otherwise %FALSE.
3087 gtk_text_layout_clamp_iter_to_vrange (GtkTextLayout *layout,
3092 GdkRectangle iter_rect;
3094 gtk_text_layout_get_iter_location (layout, iter, &iter_rect);
3096 /* If the iter is at least partially above the range, put the iter
3097 * at the first fully visible line after the range.
3099 if (iter_rect.y < top)
3101 find_display_line_below (layout, iter, top);
3105 /* Otherwise, if the iter is at least partially below the screen, put the
3106 * iter on the last logical position of the last completely visible
3109 else if (iter_rect.y + iter_rect.height > bottom)
3111 find_display_line_above (layout, iter, bottom);
3120 * gtk_text_layout_move_iter_to_previous_line:
3121 * @layout: a #GtkLayout
3122 * @iter: a #GtkTextIter
3124 * Move the iterator to the beginning of the previous line. The lines
3125 * of a wrapped paragraph are treated as distinct for this operation.
3128 gtk_text_layout_move_iter_to_previous_line (GtkTextLayout *layout,
3132 GtkTextLineDisplay *display;
3135 PangoLayoutLine *layout_line;
3137 gboolean update_byte = FALSE;
3139 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
3140 g_return_val_if_fail (iter != NULL, FALSE);
3145 line = _gtk_text_iter_get_text_line (iter);
3146 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3147 line_byte = line_display_iter_to_index (layout, display, iter);
3149 /* If display->height == 0 then the line is invisible, so don't
3152 while (display->height == 0)
3154 GtkTextLine *prev_line;
3156 prev_line = _gtk_text_line_previous (line);
3158 if (prev_line == NULL)
3160 line_display_index_to_iter (layout, display, iter, 0, 0);
3164 gtk_text_layout_free_line_display (layout, display);
3167 display = gtk_text_layout_get_line_display (layout, prev_line, FALSE);
3171 tmp_list = pango_layout_get_lines_readonly (display->layout);
3172 layout_line = tmp_list->data;
3176 line_byte = layout_line->start_index + layout_line->length;
3179 if (line_byte < layout_line->length || !tmp_list->next) /* first line of paragraph */
3181 GtkTextLine *prev_line;
3183 prev_line = _gtk_text_line_previous (line);
3185 /* first line of the whole buffer, do not move the iter and return FALSE */
3186 if (prev_line == NULL)
3191 gtk_text_layout_free_line_display (layout, display);
3193 display = gtk_text_layout_get_line_display (layout, prev_line, FALSE);
3195 if (display->height > 0)
3197 tmp_list = g_slist_last (pango_layout_get_lines_readonly (display->layout));
3198 layout_line = tmp_list->data;
3200 line_display_index_to_iter (layout, display, iter,
3201 layout_line->start_index + layout_line->length, 0);
3205 prev_line = _gtk_text_line_previous (prev_line);
3210 gint prev_offset = layout_line->start_index;
3212 tmp_list = tmp_list->next;
3215 layout_line = tmp_list->data;
3217 if (line_byte < layout_line->start_index + layout_line->length ||
3220 line_display_index_to_iter (layout, display, iter, prev_offset, 0);
3224 prev_offset = layout_line->start_index;
3225 tmp_list = tmp_list->next;
3231 gtk_text_layout_free_line_display (layout, display);
3234 !gtk_text_iter_equal (iter, &orig) &&
3235 !gtk_text_iter_is_end (iter);
3239 * gtk_text_layout_move_iter_to_next_line:
3240 * @layout: a #GtkLayout
3241 * @iter: a #GtkTextIter
3243 * Move the iterator to the beginning of the next line. The
3244 * lines of a wrapped paragraph are treated as distinct for
3248 gtk_text_layout_move_iter_to_next_line (GtkTextLayout *layout,
3252 GtkTextLineDisplay *display;
3255 gboolean found = FALSE;
3256 gboolean found_after = FALSE;
3257 gboolean first = TRUE;
3259 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
3260 g_return_val_if_fail (iter != NULL, FALSE);
3264 line = _gtk_text_iter_get_text_line (iter);
3266 while (line && !found_after)
3270 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3272 if (display->height == 0)
3277 line_byte = line_display_iter_to_index (layout, display, iter);
3283 tmp_list = pango_layout_get_lines_readonly (display->layout);
3284 while (tmp_list && !found_after)
3286 PangoLayoutLine *layout_line = tmp_list->data;
3290 line_display_index_to_iter (layout, display, iter,
3291 layout_line->start_index, 0);
3294 else if (line_byte < layout_line->start_index + layout_line->length || !tmp_list->next)
3297 tmp_list = tmp_list->next;
3302 gtk_text_layout_free_line_display (layout, display);
3304 line = _gtk_text_line_next_excluding_last (line);
3308 gtk_text_buffer_get_end_iter (layout->buffer, iter);
3311 !gtk_text_iter_equal (iter, &orig) &&
3312 !gtk_text_iter_is_end (iter);
3316 * gtk_text_layout_move_iter_to_line_end:
3317 * @layout: a #GtkTextLayout
3318 * @direction: if negative, move to beginning of line, otherwise
3319 move to end of line.
3321 * Move to the beginning or end of a display line.
3324 gtk_text_layout_move_iter_to_line_end (GtkTextLayout *layout,
3329 GtkTextLineDisplay *display;
3334 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
3335 g_return_val_if_fail (iter != NULL, FALSE);
3339 line = _gtk_text_iter_get_text_line (iter);
3340 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3341 line_byte = line_display_iter_to_index (layout, display, iter);
3343 tmp_list = pango_layout_get_lines_readonly (display->layout);
3346 PangoLayoutLine *layout_line = tmp_list->data;
3348 if (line_byte < layout_line->start_index + layout_line->length || !tmp_list->next)
3350 line_display_index_to_iter (layout, display, iter,
3351 direction < 0 ? layout_line->start_index : layout_line->start_index + layout_line->length,
3354 /* FIXME: As a bad hack, we move back one position when we
3355 * are inside a paragraph to avoid going to next line on a
3356 * forced break not at whitespace. Real fix is to keep track
3357 * of whether marks are at leading or trailing edge? */
3358 if (direction > 0 && layout_line->length > 0 &&
3359 !gtk_text_iter_ends_line (iter) &&
3360 !_gtk_text_btree_char_is_invisible (iter))
3361 gtk_text_iter_backward_char (iter);
3365 tmp_list = tmp_list->next;
3368 gtk_text_layout_free_line_display (layout, display);
3371 !gtk_text_iter_equal (iter, &orig) &&
3372 !gtk_text_iter_is_end (iter);
3377 * gtk_text_layout_iter_starts_line:
3378 * @layout: a #GtkTextLayout
3379 * @iter: iterator to test
3381 * Tests whether an iterator is at the start of a display line.
3384 gtk_text_layout_iter_starts_line (GtkTextLayout *layout,
3385 const GtkTextIter *iter)
3388 GtkTextLineDisplay *display;
3392 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
3393 g_return_val_if_fail (iter != NULL, FALSE);
3395 line = _gtk_text_iter_get_text_line (iter);
3396 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3397 line_byte = line_display_iter_to_index (layout, display, iter);
3399 tmp_list = pango_layout_get_lines_readonly (display->layout);
3402 PangoLayoutLine *layout_line = tmp_list->data;
3404 if (line_byte < layout_line->start_index + layout_line->length ||
3407 /* We're located on this line or the para delimiters before
3410 gtk_text_layout_free_line_display (layout, display);
3412 if (line_byte == layout_line->start_index)
3418 tmp_list = tmp_list->next;
3421 g_assert_not_reached ();
3426 gtk_text_layout_get_iter_at_line (GtkTextLayout *layout,
3431 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
3432 iter, line, byte_offset);
3437 * gtk_text_layout_move_iter_to_x:
3438 * @layout: a #GtkTextLayout
3439 * @iter: a #GtkTextIter
3442 * Keeping the iterator on the same line of the layout, move it to the
3443 * specified X coordinate. The lines of a wrapped paragraph are
3444 * treated as distinct for this operation.
3447 gtk_text_layout_move_iter_to_x (GtkTextLayout *layout,
3452 GtkTextLineDisplay *display;
3454 PangoLayoutIter *layout_iter;
3456 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
3457 g_return_if_fail (iter != NULL);
3459 line = _gtk_text_iter_get_text_line (iter);
3461 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3462 line_byte = line_display_iter_to_index (layout, display, iter);
3464 layout_iter = pango_layout_get_iter (display->layout);
3468 PangoLayoutLine *layout_line = pango_layout_iter_get_line_readonly (layout_iter);
3470 if (line_byte < layout_line->start_index + layout_line->length ||
3471 pango_layout_iter_at_last_line (layout_iter))
3473 PangoRectangle logical_rect;
3474 gint byte_index, trailing;
3475 gint x_offset = display->x_offset * PANGO_SCALE;
3477 pango_layout_iter_get_line_extents (layout_iter, NULL, &logical_rect);
3479 pango_layout_line_x_to_index (layout_line,
3480 x * PANGO_SCALE - x_offset - logical_rect.x,
3481 &byte_index, &trailing);
3483 line_display_index_to_iter (layout, display, iter, byte_index, trailing);
3488 while (pango_layout_iter_next_line (layout_iter));
3490 pango_layout_iter_free (layout_iter);
3492 gtk_text_layout_free_line_display (layout, display);
3496 * gtk_text_layout_move_iter_visually:
3497 * @layout: a #GtkTextLayout
3498 * @iter: a #GtkTextIter
3499 * @count: number of characters to move (negative moves left, positive moves right)
3501 * Move the iterator a given number of characters visually, treating
3502 * it as the strong cursor position. If @count is positive, then the
3503 * new strong cursor position will be @count positions to the right of
3504 * the old cursor position. If @count is negative then the new strong
3505 * cursor position will be @count positions to the left of the old
3508 * In the presence of bidirection text, the correspondence
3509 * between logical and visual order will depend on the direction
3510 * of the current run, and there may be jumps when the cursor
3511 * is moved off of the end of a run.
3515 gtk_text_layout_move_iter_visually (GtkTextLayout *layout,
3519 GtkTextLineDisplay *display = NULL;
3521 GtkTextIter lineiter;
3523 g_return_val_if_fail (layout != NULL, FALSE);
3524 g_return_val_if_fail (iter != NULL, FALSE);
3530 GtkTextLine *line = _gtk_text_iter_get_text_line (iter);
3532 gint extra_back = 0;
3535 int byte_count = _gtk_text_line_byte_count (line);
3541 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3543 if (layout->cursor_direction == GTK_TEXT_DIR_NONE)
3546 strong = display->direction == layout->cursor_direction;
3548 line_byte = line_display_iter_to_index (layout, display, iter);
3552 pango_layout_move_cursor_visually (display->layout, strong, line_byte, 0, 1, &new_index, &new_trailing);
3557 pango_layout_move_cursor_visually (display->layout, strong, line_byte, 0, -1, &new_index, &new_trailing);
3561 /* We need to handle the preedit string specially. Well, we don't really need to
3562 * handle it specially, since hopefully calling gtk_im_context_reset() will
3563 * remove the preedit string; but if we start off in front of the preedit
3564 * string (logically) and end up in or on the back edge of the preedit string,
3565 * we should move the iter one place farther.
3567 if (layout->preedit_len > 0 && display->insert_index >= 0)
3569 if (line_byte == display->insert_index + layout->preedit_len &&
3570 new_index < display->insert_index + layout->preedit_len)
3572 line_byte = display->insert_index;
3577 if (new_index < 0 || (new_index == 0 && extra_back))
3581 line = _gtk_text_line_previous (line);
3586 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
3587 &lineiter, line, 0);
3589 while (totally_invisible_line (layout, line, &lineiter));
3591 gtk_text_layout_free_line_display (layout, display);
3592 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3593 gtk_text_iter_forward_to_line_end (&lineiter);
3594 new_index = gtk_text_iter_get_visible_line_index (&lineiter);
3596 else if (new_index > byte_count)
3600 line = _gtk_text_line_next_excluding_last (line);
3604 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
3605 &lineiter, line, 0);
3607 while (totally_invisible_line (layout, line, &lineiter));
3609 gtk_text_layout_free_line_display (layout, display);
3610 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3614 line_display_index_to_iter (layout, display, iter, new_index, new_trailing);
3616 gtk_text_iter_backward_char (iter);
3619 gtk_text_layout_free_line_display (layout, display);
3624 !gtk_text_iter_equal (iter, &orig) &&
3625 !gtk_text_iter_is_end (iter);
3629 gtk_text_layout_spew (GtkTextLayout *layout)
3632 GtkTextDisplayLine *iter;
3634 guint paragraphs = 0;
3635 GtkTextLine *last_line = NULL;
3637 iter = layout->line_list;
3638 while (iter != NULL)
3640 if (iter->line != last_line)
3642 printf ("%5u paragraph (%p)\n", paragraphs, iter->line);
3644 last_line = iter->line;
3647 printf (" %5u y: %d len: %d start: %d bytes: %d\n",
3648 wrapped, iter->y, iter->length, iter->byte_offset,
3655 printf ("Layout %s recompute\n",
3656 layout->need_recompute ? "needs" : "doesn't need");
3658 printf ("Layout pars: %u lines: %u size: %d x %d Screen width: %d\n",
3659 paragraphs, wrapped, layout->width,
3660 layout->height, layout->screen_width);
3664 /* Catch all situations that move the insertion point.
3667 gtk_text_layout_mark_set_handler (GtkTextBuffer *buffer,
3668 const GtkTextIter *location,
3672 GtkTextLayout *layout = GTK_TEXT_LAYOUT (data);
3674 if (mark == gtk_text_buffer_get_insert (buffer))
3675 gtk_text_layout_update_cursor_line (layout);
3679 gtk_text_layout_buffer_insert_text (GtkTextBuffer *textbuffer,
3685 GtkTextLayout *layout = GTK_TEXT_LAYOUT (data);
3687 gtk_text_layout_update_cursor_line (layout);
3691 gtk_text_layout_buffer_delete_range (GtkTextBuffer *textbuffer,
3696 GtkTextLayout *layout = GTK_TEXT_LAYOUT (data);
3698 gtk_text_layout_update_cursor_line (layout);
3701 #define __GTK_TEXT_LAYOUT_C__
3702 #include "gtkaliasdef.c"