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_insert (layout->buffer));
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_insert (layout->buffer));
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);
958 * gtk_text_layout_is_valid:
959 * @layout: a #GtkTextLayout
961 * Check if there are any invalid regions in a #GtkTextLayout's buffer
963 * Return value: %TRUE if any invalid regions were found
966 gtk_text_layout_is_valid (GtkTextLayout *layout)
968 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
970 return _gtk_text_btree_is_valid (_gtk_text_buffer_get_btree (layout->buffer),
975 update_layout_size (GtkTextLayout *layout)
977 _gtk_text_btree_get_view_size (_gtk_text_buffer_get_btree (layout->buffer),
979 &layout->width, &layout->height);
983 * gtk_text_layout_validate_yrange:
984 * @layout: a #GtkTextLayout
985 * @anchor: iter pointing into a line that will be used as the
987 * @y0_: offset from the top of the line pointed to by @anchor at
988 * which to begin validation. (The offset here is in pixels
990 * @y1_: offset from the top of the line pointed to by @anchor at
991 * which to end validation. (The offset here is in pixels
994 * Ensure that a region of a #GtkTextLayout is valid. The ::changed
995 * signal will be emitted if any lines are validated.
998 gtk_text_layout_validate_yrange (GtkTextLayout *layout,
1004 GtkTextLine *first_line = NULL;
1005 GtkTextLine *last_line = NULL;
1007 gint delta_height = 0;
1008 gint first_line_y = 0; /* Quiet GCC */
1009 gint last_line_y = 0; /* Quiet GCC */
1011 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
1018 /* Validate backwards from the anchor line to y0
1020 line = _gtk_text_iter_get_text_line (anchor);
1021 line = _gtk_text_line_previous (line);
1023 while (line && seen < -y0)
1025 GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
1026 if (!line_data || !line_data->valid)
1028 gint old_height, new_height;
1030 old_height = line_data ? line_data->height : 0;
1032 _gtk_text_btree_validate_line (_gtk_text_buffer_get_btree (layout->buffer),
1034 line_data = _gtk_text_line_get_data (line, layout);
1036 new_height = line_data ? line_data->height : 0;
1038 delta_height += new_height - old_height;
1041 first_line_y = -seen - new_height;
1045 last_line_y = -seen;
1049 seen += line_data ? line_data->height : 0;
1050 line = _gtk_text_line_previous (line);
1053 /* Validate forwards to y1 */
1054 line = _gtk_text_iter_get_text_line (anchor);
1056 while (line && seen < y1)
1058 GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
1059 if (!line_data || !line_data->valid)
1061 gint old_height, new_height;
1063 old_height = line_data ? line_data->height : 0;
1065 _gtk_text_btree_validate_line (_gtk_text_buffer_get_btree (layout->buffer),
1067 line_data = _gtk_text_line_get_data (line, layout);
1068 new_height = line_data ? line_data->height : 0;
1070 delta_height += new_height - old_height;
1075 first_line_y = seen;
1078 last_line_y = seen + new_height;
1081 seen += line_data ? line_data->height : 0;
1082 line = _gtk_text_line_next_excluding_last (line);
1085 /* If we found and validated any invalid lines, update size and
1086 * emit the changed signal
1092 update_layout_size (layout);
1094 line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
1095 first_line, layout);
1097 gtk_text_layout_emit_changed (layout,
1099 last_line_y - first_line_y - delta_height,
1100 last_line_y - first_line_y);
1105 * gtk_text_layout_validate:
1106 * @tree: a #GtkTextLayout
1107 * @max_pixels: the maximum number of pixels to validate. (No more
1108 * than one paragraph beyond this limit will be validated)
1110 * Validate regions of a #GtkTextLayout. The ::changed signal will
1111 * be emitted for each region validated.
1114 gtk_text_layout_validate (GtkTextLayout *layout,
1117 gint y, old_height, new_height;
1119 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
1121 while (max_pixels > 0 &&
1122 _gtk_text_btree_validate (_gtk_text_buffer_get_btree (layout->buffer),
1124 &y, &old_height, &new_height))
1126 max_pixels -= new_height;
1128 update_layout_size (layout);
1129 gtk_text_layout_emit_changed (layout, y, old_height, new_height);
1133 static GtkTextLineData*
1134 gtk_text_layout_real_wrap (GtkTextLayout *layout,
1137 GtkTextLineData *line_data)
1139 GtkTextLineDisplay *display;
1141 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), NULL);
1142 g_return_val_if_fail (line != NULL, NULL);
1144 if (line_data == NULL)
1146 line_data = _gtk_text_line_data_new (layout, line);
1147 _gtk_text_line_add_data (line, line_data);
1150 display = gtk_text_layout_get_line_display (layout, line, TRUE);
1151 line_data->width = display->width;
1152 line_data->height = display->height;
1153 line_data->valid = TRUE;
1154 gtk_text_layout_free_line_display (layout, display);
1160 * Layout utility functions
1163 /* If you get the style with get_style () you need to call
1164 release_style () to free it. */
1165 static GtkTextAttributes*
1166 get_style (GtkTextLayout *layout,
1169 GtkTextAttributes *style;
1171 /* If we have the one-style cache, then it means
1172 that we haven't seen a toggle since we filled in the
1175 if (layout->one_style_cache != NULL)
1177 gtk_text_attributes_ref (layout->one_style_cache);
1178 return layout->one_style_cache;
1181 g_assert (layout->one_style_cache == NULL);
1183 /* No tags, use default style */
1184 if (tags == NULL || tags->len == 0)
1186 /* One ref for the return value, one ref for the
1187 layout->one_style_cache reference */
1188 gtk_text_attributes_ref (layout->default_style);
1189 gtk_text_attributes_ref (layout->default_style);
1190 layout->one_style_cache = layout->default_style;
1192 return layout->default_style;
1195 style = gtk_text_attributes_new ();
1197 gtk_text_attributes_copy_values (layout->default_style,
1200 _gtk_text_attributes_fill_from_tags (style,
1201 (GtkTextTag**) tags->pdata,
1204 g_assert (style->refcount == 1);
1206 /* Leave this style as the last one seen */
1207 g_assert (layout->one_style_cache == NULL);
1208 gtk_text_attributes_ref (style); /* ref held by layout->one_style_cache */
1209 layout->one_style_cache = style;
1211 /* Returning yet another refcount */
1216 release_style (GtkTextLayout *layout,
1217 GtkTextAttributes *style)
1219 g_return_if_fail (style != NULL);
1220 g_return_if_fail (style->refcount > 0);
1222 gtk_text_attributes_unref (style);
1229 /* This function tries to optimize the case where a line
1230 is completely invisible */
1232 totally_invisible_line (GtkTextLayout *layout,
1236 GtkTextLineSegment *seg;
1239 /* Check if the first char is visible, if so we are partially visible.
1240 * Note that we have to check this since we don't know the current
1241 * invisible/noninvisible toggle state; this function can use the whole btree
1244 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
1247 if (!_gtk_text_btree_char_is_invisible (iter))
1251 seg = line->segments;
1255 if (seg->byte_count > 0)
1256 bytes += seg->byte_count;
1258 /* Note that these two tests can cause us to bail out
1259 * when we shouldn't, because a higher-priority tag
1260 * may override these settings. However the important
1261 * thing is to only invisible really-invisible lines, rather
1262 * than to invisible all really-invisible lines.
1265 else if (seg->type == >k_text_toggle_on_type)
1267 invalidate_cached_style (layout);
1269 /* Bail out if an elision-unsetting tag begins */
1270 if (seg->body.toggle.info->tag->invisible_set &&
1271 !seg->body.toggle.info->tag->values->invisible)
1274 else if (seg->type == >k_text_toggle_off_type)
1276 invalidate_cached_style (layout);
1278 /* Bail out if an elision-setting tag ends */
1279 if (seg->body.toggle.info->tag->invisible_set &&
1280 seg->body.toggle.info->tag->values->invisible)
1287 if (seg != NULL) /* didn't reach line end */
1294 set_para_values (GtkTextLayout *layout,
1295 PangoDirection base_dir,
1296 GtkTextAttributes *style,
1297 GtkTextLineDisplay *display)
1299 PangoAlignment pango_align = PANGO_ALIGN_LEFT;
1300 PangoWrapMode pango_wrap = PANGO_WRAP_WORD;
1304 /* If no base direction was found, then use the style direction */
1305 case PANGO_DIRECTION_NEUTRAL :
1306 display->direction = style->direction;
1308 /* Override the base direction */
1309 if (display->direction == GTK_TEXT_DIR_RTL)
1310 base_dir = PANGO_DIRECTION_RTL;
1312 base_dir = PANGO_DIRECTION_LTR;
1315 case PANGO_DIRECTION_RTL :
1316 display->direction = GTK_TEXT_DIR_RTL;
1319 display->direction = GTK_TEXT_DIR_LTR;
1323 if (display->direction == GTK_TEXT_DIR_RTL)
1324 display->layout = pango_layout_new (layout->rtl_context);
1326 display->layout = pango_layout_new (layout->ltr_context);
1328 switch (style->justification)
1330 case GTK_JUSTIFY_LEFT:
1331 pango_align = (base_dir == PANGO_DIRECTION_LTR) ? PANGO_ALIGN_LEFT : PANGO_ALIGN_RIGHT;
1333 case GTK_JUSTIFY_RIGHT:
1334 pango_align = (base_dir == PANGO_DIRECTION_LTR) ? PANGO_ALIGN_RIGHT : PANGO_ALIGN_LEFT;
1336 case GTK_JUSTIFY_CENTER:
1337 pango_align = PANGO_ALIGN_CENTER;
1339 case GTK_JUSTIFY_FILL:
1340 pango_align = (base_dir == PANGO_DIRECTION_LTR) ? PANGO_ALIGN_LEFT : PANGO_ALIGN_RIGHT;
1341 pango_layout_set_justify (display->layout, TRUE);
1344 g_assert_not_reached ();
1348 pango_layout_set_alignment (display->layout, pango_align);
1349 pango_layout_set_spacing (display->layout,
1350 style->pixels_inside_wrap * PANGO_SCALE);
1353 pango_layout_set_tabs (display->layout, style->tabs);
1355 display->top_margin = style->pixels_above_lines;
1356 display->height = style->pixels_above_lines + style->pixels_below_lines;
1357 display->bottom_margin = style->pixels_below_lines;
1358 display->left_margin = style->left_margin;
1359 display->right_margin = style->right_margin;
1361 display->x_offset = display->left_margin;
1363 pango_layout_set_indent (display->layout,
1364 style->indent * PANGO_SCALE);
1366 switch (style->wrap_mode)
1369 pango_wrap = PANGO_WRAP_CHAR;
1372 pango_wrap = PANGO_WRAP_WORD;
1375 case GTK_WRAP_WORD_CHAR:
1376 pango_wrap = PANGO_WRAP_WORD_CHAR;
1383 if (style->wrap_mode != GTK_WRAP_NONE)
1385 int layout_width = (layout->screen_width - display->left_margin - display->right_margin);
1386 pango_layout_set_width (display->layout, layout_width * PANGO_SCALE);
1387 pango_layout_set_wrap (display->layout, pango_wrap);
1390 display->total_width = MAX (layout->screen_width, layout->width) - display->left_margin - display->right_margin;
1392 if (style->pg_bg_color)
1393 display->pg_bg_color = gdk_color_copy (style->pg_bg_color);
1395 display->pg_bg_color = NULL;
1398 static PangoAttribute *
1399 gtk_text_attr_appearance_copy (const PangoAttribute *attr)
1401 const GtkTextAttrAppearance *appearance_attr = (const GtkTextAttrAppearance *)attr;
1403 return gtk_text_attr_appearance_new (&appearance_attr->appearance);
1407 gtk_text_attr_appearance_destroy (PangoAttribute *attr)
1409 GtkTextAttrAppearance *appearance_attr = (GtkTextAttrAppearance *)attr;
1411 if (appearance_attr->appearance.bg_stipple)
1412 g_object_unref (appearance_attr->appearance.bg_stipple);
1413 if (appearance_attr->appearance.fg_stipple)
1414 g_object_unref (appearance_attr->appearance.fg_stipple);
1416 g_slice_free (GtkTextAttrAppearance, appearance_attr);
1420 gtk_text_attr_appearance_compare (const PangoAttribute *attr1,
1421 const PangoAttribute *attr2)
1423 const GtkTextAppearance *appearance1 = &((const GtkTextAttrAppearance *)attr1)->appearance;
1424 const GtkTextAppearance *appearance2 = &((const GtkTextAttrAppearance *)attr2)->appearance;
1426 return (gdk_color_equal (&appearance1->fg_color, &appearance2->fg_color) &&
1427 gdk_color_equal (&appearance1->bg_color, &appearance2->bg_color) &&
1428 appearance1->fg_stipple == appearance2->fg_stipple &&
1429 appearance1->bg_stipple == appearance2->bg_stipple &&
1430 appearance1->underline == appearance2->underline &&
1431 appearance1->strikethrough == appearance2->strikethrough &&
1432 appearance1->draw_bg == appearance2->draw_bg);
1436 * gtk_text_attr_appearance_new:
1439 * Create a new font description attribute. (This attribute
1440 * allows setting family, style, weight, variant, stretch,
1441 * and size simultaneously.)
1445 static PangoAttribute *
1446 gtk_text_attr_appearance_new (const GtkTextAppearance *appearance)
1448 static PangoAttrClass klass = {
1450 gtk_text_attr_appearance_copy,
1451 gtk_text_attr_appearance_destroy,
1452 gtk_text_attr_appearance_compare
1455 GtkTextAttrAppearance *result;
1458 klass.type = gtk_text_attr_appearance_type =
1459 pango_attr_type_register ("GtkTextAttrAppearance");
1461 result = g_slice_new (GtkTextAttrAppearance);
1462 result->attr.klass = &klass;
1464 result->appearance = *appearance;
1466 if (appearance->bg_stipple)
1467 g_object_ref (appearance->bg_stipple);
1468 if (appearance->fg_stipple)
1469 g_object_ref (appearance->fg_stipple);
1471 return (PangoAttribute *)result;
1475 add_generic_attrs (GtkTextLayout *layout,
1476 GtkTextAppearance *appearance,
1478 PangoAttrList *attrs,
1483 PangoAttribute *attr;
1485 if (appearance->underline != PANGO_UNDERLINE_NONE)
1487 attr = pango_attr_underline_new (appearance->underline);
1489 attr->start_index = start;
1490 attr->end_index = start + byte_count;
1492 pango_attr_list_insert (attrs, attr);
1495 if (appearance->strikethrough)
1497 attr = pango_attr_strikethrough_new (appearance->strikethrough);
1499 attr->start_index = start;
1500 attr->end_index = start + byte_count;
1502 pango_attr_list_insert (attrs, attr);
1505 if (appearance->rise != 0)
1507 attr = pango_attr_rise_new (appearance->rise);
1509 attr->start_index = start;
1510 attr->end_index = start + byte_count;
1512 pango_attr_list_insert (attrs, attr);
1517 attr = gtk_text_attr_appearance_new (appearance);
1519 attr->start_index = start;
1520 attr->end_index = start + byte_count;
1522 ((GtkTextAttrAppearance *)attr)->appearance.is_text = is_text;
1524 pango_attr_list_insert (attrs, attr);
1529 add_text_attrs (GtkTextLayout *layout,
1530 GtkTextAttributes *style,
1532 PangoAttrList *attrs,
1536 PangoAttribute *attr;
1538 attr = pango_attr_font_desc_new (style->font);
1539 attr->start_index = start;
1540 attr->end_index = start + byte_count;
1542 pango_attr_list_insert (attrs, attr);
1544 if (style->font_scale != 1.0)
1546 attr = pango_attr_scale_new (style->font_scale);
1548 attr->start_index = start;
1549 attr->end_index = start + byte_count;
1551 pango_attr_list_insert (attrs, attr);
1556 add_pixbuf_attrs (GtkTextLayout *layout,
1557 GtkTextLineDisplay *display,
1558 GtkTextAttributes *style,
1559 GtkTextLineSegment *seg,
1560 PangoAttrList *attrs,
1563 PangoAttribute *attr;
1564 PangoRectangle logical_rect;
1565 GtkTextPixbuf *pixbuf = &seg->body.pixbuf;
1568 width = gdk_pixbuf_get_width (pixbuf->pixbuf);
1569 height = gdk_pixbuf_get_height (pixbuf->pixbuf);
1572 logical_rect.y = -height * PANGO_SCALE;
1573 logical_rect.width = width * PANGO_SCALE;
1574 logical_rect.height = height * PANGO_SCALE;
1576 attr = pango_attr_shape_new_with_data (&logical_rect, &logical_rect,
1577 pixbuf->pixbuf, NULL, NULL);
1578 attr->start_index = start;
1579 attr->end_index = start + seg->byte_count;
1580 pango_attr_list_insert (attrs, attr);
1582 display->shaped_objects =
1583 g_slist_append (display->shaped_objects, pixbuf->pixbuf);
1587 add_child_attrs (GtkTextLayout *layout,
1588 GtkTextLineDisplay *display,
1589 GtkTextAttributes *style,
1590 GtkTextLineSegment *seg,
1591 PangoAttrList *attrs,
1594 PangoAttribute *attr;
1595 PangoRectangle logical_rect;
1603 tmp_list = seg->body.child.widgets;
1604 while (tmp_list != NULL)
1606 GtkWidget *child = tmp_list->data;
1608 if (_gtk_anchored_child_get_layout (child) == layout)
1613 gtk_widget_get_child_requisition (child, &req);
1616 height = req.height;
1623 tmp_list = g_slist_next (tmp_list);
1626 if (tmp_list == NULL)
1628 /* If tmp_list == NULL then there is no widget at this anchor in
1629 * this display; not an error. We make up an arbitrary size
1630 * to use, just so the programmer can see the blank spot.
1631 * We also put a NULL in the shaped objects list, to keep
1632 * the correspondence between the list and the shaped chars in
1633 * the layout. A bad hack, yes.
1642 display->shaped_objects = g_slist_append (display->shaped_objects, widget);
1645 logical_rect.y = -height * PANGO_SCALE;
1646 logical_rect.width = width * PANGO_SCALE;
1647 logical_rect.height = height * PANGO_SCALE;
1649 attr = pango_attr_shape_new_with_data (&logical_rect, &logical_rect,
1650 widget, NULL, NULL);
1651 attr->start_index = start;
1652 attr->end_index = start + seg->byte_count;
1653 pango_attr_list_insert (attrs, attr);
1658 * @layout: a #GtkTextLayout
1659 * @display: a #GtkTextLineDisplay
1660 * @insert_iter: iter pointing to the cursor location
1661 * @insert_index: cursor offset in the @display's layout, it may
1662 * be different from @insert_iter's offset in case when preedit
1663 * string is present.
1664 * @pos: location to store cursor position
1665 * @cursor_at_line_end: whether cursor is at the end of line
1667 * Checks whether layout should display block cursor at given position.
1668 * For this layout must be in overwrite mode and text at @insert_iter
1672 get_block_cursor (GtkTextLayout *layout,
1673 GtkTextLineDisplay *display,
1674 const GtkTextIter *insert_iter,
1677 gboolean *cursor_at_line_end)
1679 PangoRectangle pango_pos;
1681 if (layout->overwrite_mode &&
1682 gtk_text_iter_editable (insert_iter, TRUE) &&
1683 _gtk_text_util_get_block_cursor_location (display->layout,
1686 cursor_at_line_end))
1690 pos->x = PANGO_PIXELS (pango_pos.x);
1691 pos->y = PANGO_PIXELS (pango_pos.y);
1692 pos->width = PANGO_PIXELS (pango_pos.width);
1693 pos->height = PANGO_PIXELS (pango_pos.height);
1703 add_cursor (GtkTextLayout *layout,
1704 GtkTextLineDisplay *display,
1705 GtkTextLineSegment *seg,
1708 PangoRectangle strong_pos, weak_pos;
1709 GtkTextCursorDisplay *cursor = NULL; /* Quiet GCC */
1710 gboolean add_weak = FALSE;
1711 gboolean add_strong = FALSE;
1713 /* Hide insertion cursor when we have a selection or the layout
1714 * user has hidden the cursor.
1716 if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
1717 seg->body.mark.obj) &&
1718 (!layout->cursor_visible ||
1719 gtk_text_buffer_get_selection_bounds (layout->buffer, NULL, NULL)))
1722 if (layout->overwrite_mode &&
1723 _gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
1724 seg->body.mark.obj))
1727 gboolean cursor_at_line_end;
1729 _gtk_text_btree_get_iter_at_mark (_gtk_text_buffer_get_btree (layout->buffer),
1730 &iter, seg->body.mark.obj);
1732 if (get_block_cursor (layout, display, &iter, start,
1733 &display->block_cursor,
1734 &cursor_at_line_end))
1736 display->has_block_cursor = TRUE;
1737 display->cursor_at_line_end = cursor_at_line_end;
1742 pango_layout_get_cursor_pos (display->layout, start, &strong_pos, &weak_pos);
1744 if (layout->cursor_direction == GTK_TEXT_DIR_NONE)
1749 else if (display->direction == layout->cursor_direction)
1756 cursor = g_new (GtkTextCursorDisplay, 1);
1758 cursor->x = PANGO_PIXELS (strong_pos.x);
1759 cursor->y = PANGO_PIXELS (strong_pos.y);
1760 cursor->height = PANGO_PIXELS (strong_pos.height);
1761 cursor->is_strong = TRUE;
1762 cursor->is_weak = (layout->cursor_direction == GTK_TEXT_DIR_NONE) ? FALSE : TRUE;
1763 display->cursors = g_slist_prepend (display->cursors, cursor);
1768 if (weak_pos.x == strong_pos.x && add_strong)
1769 cursor->is_weak = TRUE;
1772 cursor = g_new (GtkTextCursorDisplay, 1);
1774 cursor->x = PANGO_PIXELS (weak_pos.x);
1775 cursor->y = PANGO_PIXELS (weak_pos.y);
1776 cursor->height = PANGO_PIXELS (weak_pos.height);
1777 cursor->is_strong = (layout->cursor_direction == GTK_TEXT_DIR_NONE) ? FALSE : TRUE;
1778 cursor->is_weak = TRUE;
1779 display->cursors = g_slist_prepend (display->cursors, cursor);
1785 is_shape (PangoLayoutRun *run)
1787 GSList *tmp_list = run->item->analysis.extra_attrs;
1791 PangoAttribute *attr = tmp_list->data;
1793 if (attr->klass->type == PANGO_ATTR_SHAPE)
1796 tmp_list = tmp_list->next;
1803 allocate_child_widgets (GtkTextLayout *text_layout,
1804 GtkTextLineDisplay *display)
1806 GSList *shaped = display->shaped_objects;
1807 PangoLayout *layout = display->layout;
1808 PangoLayoutIter *iter;
1810 iter = pango_layout_get_iter (layout);
1814 PangoLayoutRun *run = pango_layout_iter_get_run_readonly (iter);
1816 if (run && is_shape (run))
1818 GObject *shaped_object = shaped->data;
1819 shaped = shaped->next;
1821 /* shaped_object is NULL for child anchors with no
1822 * widgets stored at them
1824 if (shaped_object && GTK_IS_WIDGET (shaped_object))
1826 PangoRectangle extents;
1828 /* We emit "allocate_child" with the x,y of
1829 * the widget with respect to the top of the line
1830 * and the left side of the buffer
1833 pango_layout_iter_get_run_extents (iter,
1837 g_signal_emit (text_layout,
1838 signals[ALLOCATE_CHILD],
1841 PANGO_PIXELS (extents.x) + display->x_offset,
1842 PANGO_PIXELS (extents.y) + display->top_margin);
1846 while (pango_layout_iter_next_run (iter));
1848 pango_layout_iter_free (iter);
1852 convert_color (GdkColor *result,
1853 PangoAttrColor *attr)
1855 result->red = attr->color.red;
1856 result->blue = attr->color.blue;
1857 result->green = attr->color.green;
1860 /* This function is used to convert the preedit string attributes, which are
1861 * standard PangoAttributes, into the custom attributes used by the text
1862 * widget and insert them into a attr list with a given offset.
1865 add_preedit_attrs (GtkTextLayout *layout,
1866 GtkTextAttributes *style,
1867 PangoAttrList *attrs,
1871 PangoAttrIterator *iter = pango_attr_list_get_iterator (layout->preedit_attrs);
1875 GtkTextAppearance appearance = style->appearance;
1876 PangoFontDescription *font_desc = pango_font_description_copy_static (style->font);
1877 PangoAttribute *insert_attr;
1878 GSList *extra_attrs = NULL;
1880 PangoLanguage *language;
1883 pango_attr_iterator_range (iter, &start, &end);
1885 if (end == G_MAXINT)
1886 end = layout->preedit_len;
1891 pango_attr_iterator_get_font (iter, font_desc, &language, &extra_attrs);
1893 tmp_list = extra_attrs;
1896 PangoAttribute *attr = tmp_list->data;
1898 switch (attr->klass->type)
1900 case PANGO_ATTR_FOREGROUND:
1901 convert_color (&appearance.fg_color, (PangoAttrColor *)attr);
1903 case PANGO_ATTR_BACKGROUND:
1904 convert_color (&appearance.bg_color, (PangoAttrColor *)attr);
1905 appearance.draw_bg = TRUE;
1907 case PANGO_ATTR_UNDERLINE:
1908 appearance.underline = ((PangoAttrInt *)attr)->value;
1910 case PANGO_ATTR_STRIKETHROUGH:
1911 appearance.strikethrough = ((PangoAttrInt *)attr)->value;
1913 case PANGO_ATTR_RISE:
1914 appearance.rise = ((PangoAttrInt *)attr)->value;
1920 pango_attribute_destroy (attr);
1921 tmp_list = tmp_list->next;
1924 g_slist_free (extra_attrs);
1926 insert_attr = pango_attr_font_desc_new (font_desc);
1927 insert_attr->start_index = start + offset;
1928 insert_attr->end_index = end + offset;
1930 pango_attr_list_insert (attrs, insert_attr);
1934 insert_attr = pango_attr_language_new (language);
1935 insert_attr->start_index = start + offset;
1936 insert_attr->end_index = end + offset;
1938 pango_attr_list_insert (attrs, insert_attr);
1941 add_generic_attrs (layout, &appearance, end - start,
1942 attrs, start + offset,
1945 pango_font_description_free (font_desc);
1947 while (pango_attr_iterator_next (iter));
1949 pango_attr_iterator_destroy (iter);
1952 /* Iterate over the line and fill in display->cursors.
1953 * It's a stripped copy of gtk_text_layout_get_line_display() */
1955 update_text_display_cursors (GtkTextLayout *layout,
1957 GtkTextLineDisplay *display)
1959 GtkTextLineSegment *seg;
1961 gint layout_byte_offset, buffer_byte_offset;
1962 GSList *cursor_byte_offsets = NULL;
1963 GSList *cursor_segs = NULL;
1964 GSList *tmp_list1, *tmp_list2;
1966 if (!display->cursors_invalid)
1969 display->cursors_invalid = FALSE;
1971 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
1974 /* Special-case optimization for completely
1975 * invisible lines; makes it faster to deal
1976 * with sequences of invisible lines.
1978 if (totally_invisible_line (layout, line, &iter))
1981 /* Iterate over segments */
1982 layout_byte_offset = 0; /* position in the layout text (includes preedit, does not include invisible text) */
1983 buffer_byte_offset = 0; /* position in the buffer line */
1984 seg = _gtk_text_iter_get_any_segment (&iter);
1987 /* Displayable segments */
1988 if (seg->type == >k_text_char_type ||
1989 seg->type == >k_text_pixbuf_type ||
1990 seg->type == >k_text_child_type)
1992 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
1994 buffer_byte_offset);
1996 if (!_gtk_text_btree_char_is_invisible (&iter))
1997 layout_byte_offset += seg->byte_count;
1999 buffer_byte_offset += seg->byte_count;
2003 else if (seg->type == >k_text_right_mark_type ||
2004 seg->type == >k_text_left_mark_type)
2006 gint cursor_offset = 0;
2008 /* At the insertion point, add the preedit string, if any */
2010 if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
2011 seg->body.mark.obj))
2013 display->insert_index = layout_byte_offset;
2015 if (layout->preedit_len > 0)
2017 layout_byte_offset += layout->preedit_len;
2018 /* DO NOT increment the buffer byte offset for preedit */
2019 cursor_offset = layout->preedit_cursor - layout->preedit_len;
2023 /* Display visible marks */
2025 if (seg->body.mark.visible)
2027 cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets,
2028 GINT_TO_POINTER (layout_byte_offset + cursor_offset));
2029 cursor_segs = g_slist_prepend (cursor_segs, seg);
2034 else if (seg->type == >k_text_toggle_on_type ||
2035 seg->type == >k_text_toggle_off_type)
2040 g_error ("Unknown segment type: %s", seg->type->name);
2045 tmp_list1 = cursor_byte_offsets;
2046 tmp_list2 = cursor_segs;
2049 add_cursor (layout, display, tmp_list2->data,
2050 GPOINTER_TO_INT (tmp_list1->data));
2051 tmp_list1 = tmp_list1->next;
2052 tmp_list2 = tmp_list2->next;
2054 g_slist_free (cursor_byte_offsets);
2055 g_slist_free (cursor_segs);
2058 /* Same as _gtk_text_btree_get_tags(), except it returns GPtrArray,
2059 * to be used in gtk_text_layout_get_line_display(). */
2061 get_tags_array_at_iter (GtkTextIter *iter)
2064 GPtrArray *array = NULL;
2067 tags = _gtk_text_btree_get_tags (iter, &n_tags);
2071 array = g_ptr_array_sized_new (n_tags);
2072 g_ptr_array_set_size (array, n_tags);
2073 memcpy (array->pdata, tags, n_tags * sizeof (GtkTextTag*));
2080 /* Add the tag to the array if it's not there already, and remove
2081 * it otherwise. It keeps the array sorted by tags priority. */
2083 tags_array_toggle_tag (GPtrArray *array,
2090 array = g_ptr_array_new ();
2092 tags = (GtkTextTag**) array->pdata;
2094 for (pos = 0; pos < array->len && tags[pos]->priority < tag->priority; pos++) ;
2096 if (pos < array->len && tags[pos] == tag)
2097 g_ptr_array_remove_index (array, pos);
2100 g_ptr_array_set_size (array, array->len + 1);
2101 if (pos < array->len - 1)
2102 memmove (array->pdata + pos + 1, array->pdata + pos,
2103 (array->len - pos - 1) * sizeof (GtkTextTag*));
2104 array->pdata[pos] = tag;
2110 GtkTextLineDisplay *
2111 gtk_text_layout_get_line_display (GtkTextLayout *layout,
2115 GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout);
2116 GtkTextLineDisplay *display;
2117 GtkTextLineSegment *seg;
2119 GtkTextAttributes *style;
2121 PangoAttrList *attrs;
2122 gint text_allocated, layout_byte_offset, buffer_byte_offset;
2123 PangoRectangle extents;
2124 gboolean para_values_set = FALSE;
2125 GSList *cursor_byte_offsets = NULL;
2126 GSList *cursor_segs = NULL;
2127 GSList *tmp_list1, *tmp_list2;
2128 gboolean saw_widget = FALSE;
2129 PangoDirection base_dir;
2131 gboolean initial_toggle_segments;
2133 g_return_val_if_fail (line != NULL, NULL);
2135 if (layout->one_display_cache)
2137 if (line == layout->one_display_cache->line &&
2138 (size_only || !layout->one_display_cache->size_only))
2141 update_text_display_cursors (layout, line, layout->one_display_cache);
2142 return layout->one_display_cache;
2146 GtkTextLineDisplay *tmp_display = layout->one_display_cache;
2147 layout->one_display_cache = NULL;
2148 gtk_text_layout_free_line_display (layout, tmp_display);
2152 DV (g_print ("creating one line display cache (%s)\n", G_STRLOC));
2154 display = g_new0 (GtkTextLineDisplay, 1);
2156 display->size_only = size_only;
2157 display->line = line;
2158 display->insert_index = -1;
2160 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2163 /* Special-case optimization for completely
2164 * invisible lines; makes it faster to deal
2165 * with sequences of invisible lines.
2167 if (totally_invisible_line (layout, line, &iter))
2169 if (display->direction == GTK_TEXT_DIR_RTL)
2170 display->layout = pango_layout_new (layout->rtl_context);
2172 display->layout = pango_layout_new (layout->ltr_context);
2177 /* Find the bidi base direction */
2178 base_dir = line->dir_propagated_forward;
2179 if (base_dir == PANGO_DIRECTION_NEUTRAL)
2180 base_dir = line->dir_propagated_back;
2182 if (line == priv->cursor_line &&
2183 line->dir_strong == PANGO_DIRECTION_NEUTRAL)
2185 base_dir = (layout->keyboard_direction == GTK_TEXT_DIR_LTR) ?
2186 PANGO_DIRECTION_LTR : PANGO_DIRECTION_RTL;
2189 /* Allocate space for flat text for buffer
2191 text_allocated = _gtk_text_line_byte_count (line);
2192 text = g_malloc (text_allocated);
2194 attrs = pango_attr_list_new ();
2196 /* Iterate over segments, creating display chunks for them, and updating the tags array. */
2197 layout_byte_offset = 0; /* current length of layout text (includes preedit, does not include invisible text) */
2198 buffer_byte_offset = 0; /* position in the buffer line */
2199 seg = _gtk_text_iter_get_any_segment (&iter);
2200 tags = get_tags_array_at_iter (&iter);
2201 initial_toggle_segments = TRUE;
2204 /* Displayable segments */
2205 if (seg->type == >k_text_char_type ||
2206 seg->type == >k_text_pixbuf_type ||
2207 seg->type == >k_text_child_type)
2209 style = get_style (layout, tags);
2210 initial_toggle_segments = FALSE;
2212 /* We have to delay setting the paragraph values until we
2213 * hit the first pixbuf or text segment because toggles at
2214 * the beginning of the paragraph should affect the
2215 * paragraph-global values
2217 if (!para_values_set)
2219 set_para_values (layout, base_dir, style, display);
2220 para_values_set = TRUE;
2223 /* First see if the chunk is invisible, and ignore it if so. Tk
2224 * looked at tabs, wrap mode, etc. before doing this, but
2225 * that made no sense to me, so I am just skipping the
2228 if (!style->invisible)
2230 if (seg->type == >k_text_char_type)
2232 /* We don't want to split segments because of marks,
2233 * so we scan forward for more segments only
2234 * separated from us by marks. In theory, we should
2235 * also merge segments with identical styles, even
2236 * if there are toggles in-between
2240 GtkTextLineSegment *prev_seg = NULL;
2244 if (seg->type == >k_text_char_type)
2246 memcpy (text + layout_byte_offset, seg->body.chars, seg->byte_count);
2247 layout_byte_offset += seg->byte_count;
2248 buffer_byte_offset += seg->byte_count;
2249 bytes += seg->byte_count;
2251 else if (seg->type == >k_text_right_mark_type ||
2252 seg->type == >k_text_left_mark_type)
2254 /* If we have preedit string, break out of this loop - we'll almost
2255 * certainly have different attributes on the preedit string
2258 if (layout->preedit_len > 0 &&
2259 _gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
2260 seg->body.mark.obj))
2263 if (seg->body.mark.visible)
2265 cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets, GINT_TO_POINTER (layout_byte_offset));
2266 cursor_segs = g_slist_prepend (cursor_segs, seg);
2267 if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
2268 seg->body.mark.obj))
2269 display->insert_index = layout_byte_offset;
2279 seg = prev_seg; /* Back up one */
2280 add_generic_attrs (layout, &style->appearance,
2282 attrs, layout_byte_offset - bytes,
2284 add_text_attrs (layout, style, bytes, attrs,
2285 layout_byte_offset - bytes, size_only);
2287 else if (seg->type == >k_text_pixbuf_type)
2289 add_generic_attrs (layout,
2292 attrs, layout_byte_offset,
2294 add_pixbuf_attrs (layout, display, style,
2295 seg, attrs, layout_byte_offset);
2296 memcpy (text + layout_byte_offset, gtk_text_unknown_char_utf8,
2298 layout_byte_offset += seg->byte_count;
2299 buffer_byte_offset += seg->byte_count;
2301 else if (seg->type == >k_text_child_type)
2305 add_generic_attrs (layout, &style->appearance,
2307 attrs, layout_byte_offset,
2309 add_child_attrs (layout, display, style,
2310 seg, attrs, layout_byte_offset);
2311 memcpy (text + layout_byte_offset, gtk_text_unknown_char_utf8,
2313 layout_byte_offset += seg->byte_count;
2314 buffer_byte_offset += seg->byte_count;
2318 /* We don't know this segment type */
2319 g_assert_not_reached ();
2322 } /* if (segment was visible) */
2325 /* Invisible segment */
2326 buffer_byte_offset += seg->byte_count;
2329 release_style (layout, style);
2333 else if (seg->type == >k_text_toggle_on_type ||
2334 seg->type == >k_text_toggle_off_type)
2336 /* Style may have changed, drop our
2337 current cached style */
2338 invalidate_cached_style (layout);
2339 /* Add the tag only after we have seen some non-toggle non-mark segment,
2340 * otherwise the tag is already accounted for by _gtk_text_btree_get_tags(). */
2341 if (!initial_toggle_segments)
2342 tags = tags_array_toggle_tag (tags, seg->body.toggle.info->tag);
2346 else if (seg->type == >k_text_right_mark_type ||
2347 seg->type == >k_text_left_mark_type)
2349 gint cursor_offset = 0;
2351 /* At the insertion point, add the preedit string, if any */
2353 if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
2354 seg->body.mark.obj))
2356 display->insert_index = layout_byte_offset;
2358 if (layout->preedit_len > 0)
2360 text_allocated += layout->preedit_len;
2361 text = g_realloc (text, text_allocated);
2363 style = get_style (layout, tags);
2364 add_preedit_attrs (layout, style, attrs, layout_byte_offset, size_only);
2365 release_style (layout, style);
2367 memcpy (text + layout_byte_offset, layout->preedit_string, layout->preedit_len);
2368 layout_byte_offset += layout->preedit_len;
2369 /* DO NOT increment the buffer byte offset for preedit */
2371 cursor_offset = layout->preedit_cursor - layout->preedit_len;
2376 /* Display visible marks */
2378 if (seg->body.mark.visible)
2380 cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets,
2381 GINT_TO_POINTER (layout_byte_offset + cursor_offset));
2382 cursor_segs = g_slist_prepend (cursor_segs, seg);
2387 g_error ("Unknown segment type: %s", seg->type->name);
2392 if (!para_values_set)
2394 style = get_style (layout, tags);
2395 set_para_values (layout, base_dir, style, display);
2396 release_style (layout, style);
2399 /* Pango doesn't want the trailing paragraph delimiters */
2402 /* Only one character has type G_UNICODE_PARAGRAPH_SEPARATOR in
2403 * Unicode 3.0; update this if that changes.
2405 #define PARAGRAPH_SEPARATOR 0x2029
2408 if (layout_byte_offset > 0)
2410 const char *prev = g_utf8_prev_char (text + layout_byte_offset);
2411 ch = g_utf8_get_char (prev);
2412 if (ch == PARAGRAPH_SEPARATOR || ch == '\r' || ch == '\n')
2413 layout_byte_offset = prev - text; /* chop off */
2415 if (ch == '\n' && layout_byte_offset > 0)
2417 /* Possibly chop a CR as well */
2418 prev = g_utf8_prev_char (text + layout_byte_offset);
2420 --layout_byte_offset;
2425 pango_layout_set_text (display->layout, text, layout_byte_offset);
2426 pango_layout_set_attributes (display->layout, attrs);
2428 tmp_list1 = cursor_byte_offsets;
2429 tmp_list2 = cursor_segs;
2432 add_cursor (layout, display, tmp_list2->data,
2433 GPOINTER_TO_INT (tmp_list1->data));
2434 tmp_list1 = tmp_list1->next;
2435 tmp_list2 = tmp_list2->next;
2437 g_slist_free (cursor_byte_offsets);
2438 g_slist_free (cursor_segs);
2440 pango_layout_get_extents (display->layout, NULL, &extents);
2442 display->width = PIXEL_BOUND (extents.width) + display->left_margin + display->right_margin;
2443 display->height += PANGO_PIXELS (extents.height);
2445 /* If we aren't wrapping, we need to do the alignment of each
2446 * paragraph ourselves.
2448 if (pango_layout_get_width (display->layout) < 0)
2450 gint excess = display->total_width - display->width;
2452 switch (pango_layout_get_alignment (display->layout))
2454 case PANGO_ALIGN_LEFT:
2456 case PANGO_ALIGN_CENTER:
2457 display->x_offset += excess / 2;
2459 case PANGO_ALIGN_RIGHT:
2460 display->x_offset += excess;
2465 /* Free this if we aren't in a loop */
2466 if (layout->wrap_loop_count == 0)
2467 invalidate_cached_style (layout);
2470 pango_attr_list_unref (attrs);
2472 g_ptr_array_free (tags, TRUE);
2474 layout->one_display_cache = display;
2477 allocate_child_widgets (layout, display);
2483 gtk_text_layout_free_line_display (GtkTextLayout *layout,
2484 GtkTextLineDisplay *display)
2486 if (display != layout->one_display_cache)
2488 if (display->layout)
2489 g_object_unref (display->layout);
2491 if (display->cursors)
2493 g_slist_foreach (display->cursors, (GFunc)g_free, NULL);
2494 g_slist_free (display->cursors);
2496 g_slist_free (display->shaped_objects);
2498 if (display->pg_bg_color)
2499 gdk_color_free (display->pg_bg_color);
2505 /* Functions to convert iter <=> index for the line of a GtkTextLineDisplay
2506 * taking into account the preedit string and invisible text if necessary.
2509 line_display_iter_to_index (GtkTextLayout *layout,
2510 GtkTextLineDisplay *display,
2511 const GtkTextIter *iter)
2515 g_return_val_if_fail (_gtk_text_iter_get_text_line (iter) == display->line, 0);
2517 index = gtk_text_iter_get_visible_line_index (iter);
2519 if (layout->preedit_len > 0 && display->insert_index >= 0)
2521 if (index >= display->insert_index)
2522 index += layout->preedit_len;
2529 line_display_index_to_iter (GtkTextLayout *layout,
2530 GtkTextLineDisplay *display,
2535 g_return_if_fail (!_gtk_text_line_is_last (display->line,
2536 _gtk_text_buffer_get_btree (layout->buffer)));
2538 if (layout->preedit_len > 0 && display->insert_index >= 0)
2540 if (index >= display->insert_index + layout->preedit_len)
2541 index -= layout->preedit_len;
2542 else if (index > display->insert_index)
2544 index = display->insert_index;
2549 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2550 iter, display->line, 0);
2552 gtk_text_iter_set_visible_line_index (iter, index);
2554 if (_gtk_text_iter_get_text_line (iter) != display->line)
2556 /* Clamp to end of line - really this clamping should have been done
2557 * before here, maybe in Pango, this is a broken band-aid I think
2559 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2560 iter, display->line, 0);
2562 if (!gtk_text_iter_ends_line (iter))
2563 gtk_text_iter_forward_to_line_end (iter);
2566 gtk_text_iter_forward_chars (iter, trailing);
2570 get_line_at_y (GtkTextLayout *layout,
2577 if (y > layout->height)
2580 *line = _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
2581 layout, y, line_top);
2584 *line = _gtk_text_btree_get_end_iter_line (_gtk_text_buffer_get_btree (layout->buffer));
2588 _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2594 * gtk_text_layout_get_line_at_y:
2595 * @layout: a #GtkLayout
2596 * @target_iter: the iterator in which the result is stored
2597 * @y: the y positition
2598 * @line_top: location to store the y coordinate of the
2599 * top of the line. (Can by %NULL.)
2601 * Get the iter at the beginning of the line which is displayed
2605 gtk_text_layout_get_line_at_y (GtkTextLayout *layout,
2606 GtkTextIter *target_iter,
2612 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2613 g_return_if_fail (target_iter != NULL);
2615 get_line_at_y (layout, y, &line, line_top);
2616 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2617 target_iter, line, 0);
2621 gtk_text_layout_get_iter_at_pixel (GtkTextLayout *layout,
2622 GtkTextIter *target_iter,
2628 gtk_text_layout_get_iter_at_position (layout, target_iter, &trailing, x, y);
2630 gtk_text_iter_forward_chars (target_iter, trailing);
2633 void gtk_text_layout_get_iter_at_position (GtkTextLayout *layout,
2634 GtkTextIter *target_iter,
2642 GtkTextLineDisplay *display;
2644 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2645 g_return_if_fail (target_iter != NULL);
2647 get_line_at_y (layout, y, &line, &line_top);
2649 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2651 x -= display->x_offset;
2652 y -= line_top + display->top_margin;
2654 /* If we are below the layout, position the cursor at the last character
2657 if (y > display->height - display->top_margin - display->bottom_margin)
2659 byte_index = _gtk_text_line_byte_count (line);
2664 /* Ignore the "outside" return value from pango. Pango is doing
2665 * the right thing even if we are outside the layout in the
2668 pango_layout_xy_to_index (display->layout, x * PANGO_SCALE, y * PANGO_SCALE,
2669 &byte_index, trailing);
2672 line_display_index_to_iter (layout, display, target_iter, byte_index, 0);
2674 gtk_text_layout_free_line_display (layout, display);
2679 * gtk_text_layout_get_cursor_locations:
2680 * @layout: a #GtkTextLayout
2681 * @iter: a #GtkTextIter
2682 * @strong_pos: location to store the strong cursor position (may be %NULL)
2683 * @weak_pos: location to store the weak cursor position (may be %NULL)
2685 * Given an iterator within a text layout, determine the positions of the
2686 * strong and weak cursors if the insertion point is at that
2687 * iterator. The position of each cursor is stored as a zero-width
2688 * rectangle. The strong cursor location is the location where
2689 * characters of the directionality equal to the base direction of the
2690 * paragraph are inserted. The weak cursor location is the location
2691 * where characters of the directionality opposite to the base
2692 * direction of the paragraph are inserted.
2695 gtk_text_layout_get_cursor_locations (GtkTextLayout *layout,
2697 GdkRectangle *strong_pos,
2698 GdkRectangle *weak_pos)
2701 GtkTextLineDisplay *display;
2704 GtkTextIter insert_iter;
2706 PangoRectangle pango_strong_pos;
2707 PangoRectangle pango_weak_pos;
2709 g_return_if_fail (layout != NULL);
2710 g_return_if_fail (iter != NULL);
2712 line = _gtk_text_iter_get_text_line (iter);
2713 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2714 index = line_display_iter_to_index (layout, display, iter);
2716 line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2719 gtk_text_buffer_get_iter_at_mark (layout->buffer, &insert_iter,
2720 gtk_text_buffer_get_insert (layout->buffer));
2722 if (gtk_text_iter_equal (iter, &insert_iter))
2723 index += layout->preedit_cursor - layout->preedit_len;
2725 pango_layout_get_cursor_pos (display->layout, index,
2726 strong_pos ? &pango_strong_pos : NULL,
2727 weak_pos ? &pango_weak_pos : NULL);
2731 strong_pos->x = display->x_offset + pango_strong_pos.x / PANGO_SCALE;
2732 strong_pos->y = line_top + display->top_margin + pango_strong_pos.y / PANGO_SCALE;
2733 strong_pos->width = 0;
2734 strong_pos->height = pango_strong_pos.height / PANGO_SCALE;
2739 weak_pos->x = display->x_offset + pango_weak_pos.x / PANGO_SCALE;
2740 weak_pos->y = line_top + display->top_margin + pango_weak_pos.y / PANGO_SCALE;
2741 weak_pos->width = 0;
2742 weak_pos->height = pango_weak_pos.height / PANGO_SCALE;
2745 gtk_text_layout_free_line_display (layout, display);
2749 * _gtk_text_layout_get_block_cursor:
2750 * @layout: a #GtkTextLayout
2751 * @pos: a #GdkRectangle to store block cursor position
2753 * If layout is to display a block cursor, calculates its position
2754 * and returns %TRUE. Otherwise it returns %FALSE. In case when
2755 * cursor is visible, it simply returns the position stored in
2756 * the line display, otherwise it has to compute the position
2757 * (see get_block_cursor()).
2760 _gtk_text_layout_get_block_cursor (GtkTextLayout *layout,
2764 GtkTextLineDisplay *display;
2767 gboolean block = FALSE;
2769 g_return_val_if_fail (layout != NULL, FALSE);
2771 gtk_text_buffer_get_iter_at_mark (layout->buffer, &iter,
2772 gtk_text_buffer_get_insert (layout->buffer));
2773 line = _gtk_text_iter_get_text_line (&iter);
2774 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2776 if (display->has_block_cursor)
2779 rect = display->block_cursor;
2783 gint index = display->insert_index;
2786 index = gtk_text_iter_get_line_index (&iter);
2788 if (get_block_cursor (layout, display, &iter, index, &rect, NULL))
2796 line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2800 pos->x += display->x_offset;
2801 pos->y += line_top + display->top_margin;
2804 gtk_text_layout_free_line_display (layout, display);
2809 * gtk_text_layout_get_line_yrange:
2810 * @layout: a #GtkTextLayout
2811 * @iter: a #GtkTextIter
2812 * @y: location to store the top of the paragraph in pixels,
2814 * @height location to store the height of the paragraph in pixels,
2817 * Find the range of y coordinates for the paragraph containing
2821 gtk_text_layout_get_line_yrange (GtkTextLayout *layout,
2822 const GtkTextIter *iter,
2828 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2829 g_return_if_fail (_gtk_text_iter_get_btree (iter) == _gtk_text_buffer_get_btree (layout->buffer));
2831 line = _gtk_text_iter_get_text_line (iter);
2834 *y = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2838 GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
2840 *height = line_data->height;
2847 * _gtk_text_layout_get_line_xrange:
2848 * @layout: a #GtkTextLayout
2849 * @iter: a #GtkTextIter
2850 * @x: location to store the top of the paragraph in pixels,
2852 * @width location to store the height of the paragraph in pixels,
2855 * Find the range of X coordinates for the paragraph containing
2856 * the given iter. Private for 2.0 due to API freeze, could
2857 * be made public for 2.2.
2860 _gtk_text_layout_get_line_xrange (GtkTextLayout *layout,
2861 const GtkTextIter *iter,
2867 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2868 g_return_if_fail (_gtk_text_iter_get_btree (iter) == _gtk_text_buffer_get_btree (layout->buffer));
2870 line = _gtk_text_iter_get_text_line (iter);
2873 *x = 0; /* FIXME This is wrong; should represent the first available cursor position */
2877 GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
2879 *width = line_data->width;
2886 gtk_text_layout_get_iter_location (GtkTextLayout *layout,
2887 const GtkTextIter *iter,
2890 PangoRectangle pango_rect;
2893 GtkTextLineDisplay *display;
2897 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2898 g_return_if_fail (_gtk_text_iter_get_btree (iter) == _gtk_text_buffer_get_btree (layout->buffer));
2899 g_return_if_fail (rect != NULL);
2901 tree = _gtk_text_iter_get_btree (iter);
2902 line = _gtk_text_iter_get_text_line (iter);
2904 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2906 rect->y = _gtk_text_btree_find_line_top (tree, line, layout);
2908 x_offset = display->x_offset * PANGO_SCALE;
2910 byte_index = gtk_text_iter_get_line_index (iter);
2912 pango_layout_index_to_pos (display->layout, byte_index, &pango_rect);
2914 rect->x = PANGO_PIXELS (x_offset + pango_rect.x);
2915 rect->y += PANGO_PIXELS (pango_rect.y) + display->top_margin;
2916 rect->width = PANGO_PIXELS (pango_rect.width);
2917 rect->height = PANGO_PIXELS (pango_rect.height);
2919 gtk_text_layout_free_line_display (layout, display);
2924 /* Find the iter for the logical beginning of the first display line whose
2925 * top y is >= y. If none exists, move the iter to the logical beginning
2926 * of the last line in the buffer.
2929 find_display_line_below (GtkTextLayout *layout,
2933 GtkTextLine *line, *next;
2934 GtkTextLine *found_line = NULL;
2936 gint found_byte = 0;
2938 line = _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
2939 layout, y, &line_top);
2943 _gtk_text_btree_get_end_iter_line (_gtk_text_buffer_get_btree (layout->buffer));
2946 _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2950 while (line && !found_line)
2952 GtkTextLineDisplay *display = gtk_text_layout_get_line_display (layout, line, FALSE);
2953 PangoLayoutIter *layout_iter;
2955 layout_iter = pango_layout_get_iter (display->layout);
2957 line_top += display->top_margin;
2961 gint first_y, last_y;
2962 PangoLayoutLine *layout_line = pango_layout_iter_get_line_readonly (layout_iter);
2964 found_byte = layout_line->start_index;
2972 pango_layout_iter_get_line_yrange (layout_iter, &first_y, &last_y);
2973 line_top += (last_y - first_y) / PANGO_SCALE;
2975 while (pango_layout_iter_next_line (layout_iter));
2977 pango_layout_iter_free (layout_iter);
2979 line_top += display->bottom_margin;
2980 gtk_text_layout_free_line_display (layout, display);
2982 next = _gtk_text_line_next_excluding_last (line);
2989 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2990 iter, found_line, found_byte);
2993 /* Find the iter for the logical beginning of the last display line whose
2994 * top y is >= y. If none exists, move the iter to the logical beginning
2995 * of the first line in the buffer.
2998 find_display_line_above (GtkTextLayout *layout,
3003 GtkTextLine *found_line = NULL;
3005 gint found_byte = 0;
3007 line = _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer), layout, y, &line_top);
3010 line = _gtk_text_btree_get_end_iter_line (_gtk_text_buffer_get_btree (layout->buffer));
3012 line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer), line, layout);
3015 while (line && !found_line)
3017 GtkTextLineDisplay *display = gtk_text_layout_get_line_display (layout, line, FALSE);
3018 PangoRectangle logical_rect;
3019 PangoLayoutIter *layout_iter;
3022 layout_iter = pango_layout_get_iter (display->layout);
3024 line_top -= display->top_margin + display->bottom_margin;
3025 pango_layout_iter_get_layout_extents (layout_iter, NULL, &logical_rect);
3026 line_top -= logical_rect.height / PANGO_SCALE;
3028 tmp_top = line_top + display->top_margin;
3032 gint first_y, last_y;
3033 PangoLayoutLine *layout_line = pango_layout_iter_get_line_readonly (layout_iter);
3035 found_byte = layout_line->start_index;
3037 pango_layout_iter_get_line_yrange (layout_iter, &first_y, &last_y);
3039 tmp_top -= (last_y - first_y) / PANGO_SCALE;
3044 pango_layout_iter_free (layout_iter);
3048 while (pango_layout_iter_next_line (layout_iter));
3050 pango_layout_iter_free (layout_iter);
3052 gtk_text_layout_free_line_display (layout, display);
3054 line = _gtk_text_line_previous (line);
3060 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
3061 iter, found_line, found_byte);
3063 gtk_text_buffer_get_iter_at_offset (layout->buffer, iter, 0);
3067 * gtk_text_layout_clamp_iter_to_vrange:
3068 * @layout: a #GtkTextLayout
3069 * @iter: a #GtkTextIter
3070 * @top: the top of the range
3071 * @bottom: the bottom the range
3073 * If the iterator is not fully in the range @top <= y < @bottom,
3074 * then, if possible, move it the minimum distance so that the
3075 * iterator in this range.
3077 * Returns: %TRUE if the iterator was moved, otherwise %FALSE.
3080 gtk_text_layout_clamp_iter_to_vrange (GtkTextLayout *layout,
3085 GdkRectangle iter_rect;
3087 gtk_text_layout_get_iter_location (layout, iter, &iter_rect);
3089 /* If the iter is at least partially above the range, put the iter
3090 * at the first fully visible line after the range.
3092 if (iter_rect.y < top)
3094 find_display_line_below (layout, iter, top);
3098 /* Otherwise, if the iter is at least partially below the screen, put the
3099 * iter on the last logical position of the last completely visible
3102 else if (iter_rect.y + iter_rect.height > bottom)
3104 find_display_line_above (layout, iter, bottom);
3113 * gtk_text_layout_move_iter_to_previous_line:
3114 * @layout: a #GtkLayout
3115 * @iter: a #GtkTextIter
3117 * Move the iterator to the beginning of the previous line. The lines
3118 * of a wrapped paragraph are treated as distinct for this operation.
3121 gtk_text_layout_move_iter_to_previous_line (GtkTextLayout *layout,
3125 GtkTextLineDisplay *display;
3128 PangoLayoutLine *layout_line;
3130 gboolean update_byte = FALSE;
3132 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
3133 g_return_val_if_fail (iter != NULL, FALSE);
3138 line = _gtk_text_iter_get_text_line (iter);
3139 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3140 line_byte = line_display_iter_to_index (layout, display, iter);
3142 /* If display->height == 0 then the line is invisible, so don't
3145 while (display->height == 0)
3147 GtkTextLine *prev_line;
3149 prev_line = _gtk_text_line_previous (line);
3151 if (prev_line == NULL)
3153 line_display_index_to_iter (layout, display, iter, 0, 0);
3157 gtk_text_layout_free_line_display (layout, display);
3160 display = gtk_text_layout_get_line_display (layout, prev_line, FALSE);
3164 tmp_list = pango_layout_get_lines_readonly (display->layout);
3165 layout_line = tmp_list->data;
3169 line_byte = layout_line->start_index + layout_line->length;
3172 if (line_byte < layout_line->length || !tmp_list->next) /* first line of paragraph */
3174 GtkTextLine *prev_line;
3176 prev_line = _gtk_text_line_previous (line);
3178 /* first line of the whole buffer, do not move the iter and return FALSE */
3179 if (prev_line == NULL)
3184 gtk_text_layout_free_line_display (layout, display);
3186 display = gtk_text_layout_get_line_display (layout, prev_line, FALSE);
3188 if (display->height > 0)
3190 tmp_list = g_slist_last (pango_layout_get_lines_readonly (display->layout));
3191 layout_line = tmp_list->data;
3193 line_display_index_to_iter (layout, display, iter,
3194 layout_line->start_index + layout_line->length, 0);
3198 prev_line = _gtk_text_line_previous (prev_line);
3203 gint prev_offset = layout_line->start_index;
3205 tmp_list = tmp_list->next;
3208 layout_line = tmp_list->data;
3210 if (line_byte < layout_line->start_index + layout_line->length ||
3213 line_display_index_to_iter (layout, display, iter, prev_offset, 0);
3217 prev_offset = layout_line->start_index;
3218 tmp_list = tmp_list->next;
3224 gtk_text_layout_free_line_display (layout, display);
3227 !gtk_text_iter_equal (iter, &orig) &&
3228 !gtk_text_iter_is_end (iter);
3232 * gtk_text_layout_move_iter_to_next_line:
3233 * @layout: a #GtkLayout
3234 * @iter: a #GtkTextIter
3236 * Move the iterator to the beginning of the next line. The
3237 * lines of a wrapped paragraph are treated as distinct for
3241 gtk_text_layout_move_iter_to_next_line (GtkTextLayout *layout,
3245 GtkTextLineDisplay *display;
3248 gboolean found = FALSE;
3249 gboolean found_after = FALSE;
3250 gboolean first = TRUE;
3252 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
3253 g_return_val_if_fail (iter != NULL, FALSE);
3257 line = _gtk_text_iter_get_text_line (iter);
3259 while (line && !found_after)
3263 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3265 if (display->height == 0)
3270 line_byte = line_display_iter_to_index (layout, display, iter);
3276 tmp_list = pango_layout_get_lines_readonly (display->layout);
3277 while (tmp_list && !found_after)
3279 PangoLayoutLine *layout_line = tmp_list->data;
3283 line_display_index_to_iter (layout, display, iter,
3284 layout_line->start_index, 0);
3287 else if (line_byte < layout_line->start_index + layout_line->length || !tmp_list->next)
3290 tmp_list = tmp_list->next;
3295 gtk_text_layout_free_line_display (layout, display);
3297 line = _gtk_text_line_next_excluding_last (line);
3301 gtk_text_buffer_get_end_iter (layout->buffer, iter);
3304 !gtk_text_iter_equal (iter, &orig) &&
3305 !gtk_text_iter_is_end (iter);
3309 * gtk_text_layout_move_iter_to_line_end:
3310 * @layout: a #GtkTextLayout
3311 * @direction: if negative, move to beginning of line, otherwise
3312 move to end of line.
3314 * Move to the beginning or end of a display line.
3317 gtk_text_layout_move_iter_to_line_end (GtkTextLayout *layout,
3322 GtkTextLineDisplay *display;
3327 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
3328 g_return_val_if_fail (iter != NULL, FALSE);
3332 line = _gtk_text_iter_get_text_line (iter);
3333 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3334 line_byte = line_display_iter_to_index (layout, display, iter);
3336 tmp_list = pango_layout_get_lines_readonly (display->layout);
3339 PangoLayoutLine *layout_line = tmp_list->data;
3341 if (line_byte < layout_line->start_index + layout_line->length || !tmp_list->next)
3343 line_display_index_to_iter (layout, display, iter,
3344 direction < 0 ? layout_line->start_index : layout_line->start_index + layout_line->length,
3347 /* FIXME: As a bad hack, we move back one position when we
3348 * are inside a paragraph to avoid going to next line on a
3349 * forced break not at whitespace. Real fix is to keep track
3350 * of whether marks are at leading or trailing edge? */
3351 if (direction > 0 && layout_line->length > 0 &&
3352 !gtk_text_iter_ends_line (iter) &&
3353 !_gtk_text_btree_char_is_invisible (iter))
3354 gtk_text_iter_backward_char (iter);
3358 tmp_list = tmp_list->next;
3361 gtk_text_layout_free_line_display (layout, display);
3364 !gtk_text_iter_equal (iter, &orig) &&
3365 !gtk_text_iter_is_end (iter);
3370 * gtk_text_layout_iter_starts_line:
3371 * @layout: a #GtkTextLayout
3372 * @iter: iterator to test
3374 * Tests whether an iterator is at the start of a display line.
3377 gtk_text_layout_iter_starts_line (GtkTextLayout *layout,
3378 const GtkTextIter *iter)
3381 GtkTextLineDisplay *display;
3385 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
3386 g_return_val_if_fail (iter != NULL, FALSE);
3388 line = _gtk_text_iter_get_text_line (iter);
3389 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3390 line_byte = line_display_iter_to_index (layout, display, iter);
3392 tmp_list = pango_layout_get_lines_readonly (display->layout);
3395 PangoLayoutLine *layout_line = tmp_list->data;
3397 if (line_byte < layout_line->start_index + layout_line->length ||
3400 /* We're located on this line or the para delimiters before
3403 gtk_text_layout_free_line_display (layout, display);
3405 if (line_byte == layout_line->start_index)
3411 tmp_list = tmp_list->next;
3414 g_assert_not_reached ();
3419 gtk_text_layout_get_iter_at_line (GtkTextLayout *layout,
3424 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
3425 iter, line, byte_offset);
3430 * gtk_text_layout_move_iter_to_x:
3431 * @layout: a #GtkTextLayout
3432 * @iter: a #GtkTextIter
3435 * Keeping the iterator on the same line of the layout, move it to the
3436 * specified X coordinate. The lines of a wrapped paragraph are
3437 * treated as distinct for this operation.
3440 gtk_text_layout_move_iter_to_x (GtkTextLayout *layout,
3445 GtkTextLineDisplay *display;
3447 PangoLayoutIter *layout_iter;
3449 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
3450 g_return_if_fail (iter != NULL);
3452 line = _gtk_text_iter_get_text_line (iter);
3454 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3455 line_byte = line_display_iter_to_index (layout, display, iter);
3457 layout_iter = pango_layout_get_iter (display->layout);
3461 PangoLayoutLine *layout_line = pango_layout_iter_get_line_readonly (layout_iter);
3463 if (line_byte < layout_line->start_index + layout_line->length ||
3464 pango_layout_iter_at_last_line (layout_iter))
3466 PangoRectangle logical_rect;
3467 gint byte_index, trailing;
3468 gint x_offset = display->x_offset * PANGO_SCALE;
3470 pango_layout_iter_get_line_extents (layout_iter, NULL, &logical_rect);
3472 pango_layout_line_x_to_index (layout_line,
3473 x * PANGO_SCALE - x_offset - logical_rect.x,
3474 &byte_index, &trailing);
3476 line_display_index_to_iter (layout, display, iter, byte_index, trailing);
3481 while (pango_layout_iter_next_line (layout_iter));
3483 pango_layout_iter_free (layout_iter);
3485 gtk_text_layout_free_line_display (layout, display);
3489 * gtk_text_layout_move_iter_visually:
3490 * @layout: a #GtkTextLayout
3491 * @iter: a #GtkTextIter
3492 * @count: number of characters to move (negative moves left, positive moves right)
3494 * Move the iterator a given number of characters visually, treating
3495 * it as the strong cursor position. If @count is positive, then the
3496 * new strong cursor position will be @count positions to the right of
3497 * the old cursor position. If @count is negative then the new strong
3498 * cursor position will be @count positions to the left of the old
3501 * In the presence of bidirection text, the correspondence
3502 * between logical and visual order will depend on the direction
3503 * of the current run, and there may be jumps when the cursor
3504 * is moved off of the end of a run.
3508 gtk_text_layout_move_iter_visually (GtkTextLayout *layout,
3512 GtkTextLineDisplay *display = NULL;
3514 GtkTextIter lineiter;
3516 g_return_val_if_fail (layout != NULL, FALSE);
3517 g_return_val_if_fail (iter != NULL, FALSE);
3523 GtkTextLine *line = _gtk_text_iter_get_text_line (iter);
3525 gint extra_back = 0;
3528 int byte_count = _gtk_text_line_byte_count (line);
3534 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3536 if (layout->cursor_direction == GTK_TEXT_DIR_NONE)
3539 strong = display->direction == layout->cursor_direction;
3541 line_byte = line_display_iter_to_index (layout, display, iter);
3545 pango_layout_move_cursor_visually (display->layout, strong, line_byte, 0, 1, &new_index, &new_trailing);
3550 pango_layout_move_cursor_visually (display->layout, strong, line_byte, 0, -1, &new_index, &new_trailing);
3554 /* We need to handle the preedit string specially. Well, we don't really need to
3555 * handle it specially, since hopefully calling gtk_im_context_reset() will
3556 * remove the preedit string; but if we start off in front of the preedit
3557 * string (logically) and end up in or on the back edge of the preedit string,
3558 * we should move the iter one place farther.
3560 if (layout->preedit_len > 0 && display->insert_index >= 0)
3562 if (line_byte == display->insert_index + layout->preedit_len &&
3563 new_index < display->insert_index + layout->preedit_len)
3565 line_byte = display->insert_index;
3570 if (new_index < 0 || (new_index == 0 && extra_back))
3574 line = _gtk_text_line_previous (line);
3579 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
3580 &lineiter, line, 0);
3582 while (totally_invisible_line (layout, line, &lineiter));
3584 gtk_text_layout_free_line_display (layout, display);
3585 display = gtk_text_layout_get_line_display (layout, line, FALSE);
3586 gtk_text_iter_forward_to_line_end (&lineiter);
3587 new_index = gtk_text_iter_get_visible_line_index (&lineiter);
3589 else if (new_index > byte_count)
3593 line = _gtk_text_line_next_excluding_last (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);
3607 line_display_index_to_iter (layout, display, iter, new_index, new_trailing);
3609 gtk_text_iter_backward_char (iter);
3612 gtk_text_layout_free_line_display (layout, display);
3617 !gtk_text_iter_equal (iter, &orig) &&
3618 !gtk_text_iter_is_end (iter);
3622 gtk_text_layout_spew (GtkTextLayout *layout)
3625 GtkTextDisplayLine *iter;
3627 guint paragraphs = 0;
3628 GtkTextLine *last_line = NULL;
3630 iter = layout->line_list;
3631 while (iter != NULL)
3633 if (iter->line != last_line)
3635 printf ("%5u paragraph (%p)\n", paragraphs, iter->line);
3637 last_line = iter->line;
3640 printf (" %5u y: %d len: %d start: %d bytes: %d\n",
3641 wrapped, iter->y, iter->length, iter->byte_offset,
3648 printf ("Layout %s recompute\n",
3649 layout->need_recompute ? "needs" : "doesn't need");
3651 printf ("Layout pars: %u lines: %u size: %d x %d Screen width: %d\n",
3652 paragraphs, wrapped, layout->width,
3653 layout->height, layout->screen_width);
3657 /* Catch all situations that move the insertion point.
3660 gtk_text_layout_mark_set_handler (GtkTextBuffer *buffer,
3661 const GtkTextIter *location,
3665 GtkTextLayout *layout = GTK_TEXT_LAYOUT (data);
3667 if (mark == gtk_text_buffer_get_insert (buffer))
3668 gtk_text_layout_update_cursor_line (layout);
3672 gtk_text_layout_buffer_insert_text (GtkTextBuffer *textbuffer,
3678 GtkTextLayout *layout = GTK_TEXT_LAYOUT (data);
3680 gtk_text_layout_update_cursor_line (layout);
3684 gtk_text_layout_buffer_delete_range (GtkTextBuffer *textbuffer,
3689 GtkTextLayout *layout = GTK_TEXT_LAYOUT (data);
3691 gtk_text_layout_update_cursor_line (layout);
3694 #define __GTK_TEXT_LAYOUT_C__
3695 #include "gtkaliasdef.c"