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 #include "gtksignal.h"
80 #include "gtktextlayout.h"
81 #include "gtktextbtree.h"
82 #include "gtktextiterprivate.h"
87 static GtkTextLineData *gtk_text_line_data_new (GtkTextLayout *layout,
90 static GtkTextLineData *gtk_text_layout_real_wrap (GtkTextLayout *layout,
93 GtkTextLineData *line_data);
95 static void gtk_text_layout_invalidated (GtkTextLayout *layout);
97 static void gtk_text_layout_real_invalidate (GtkTextLayout *layout,
98 const GtkTextIter *start,
99 const GtkTextIter *end);
100 static void gtk_text_layout_invalidate_cache (GtkTextLayout *layout,
102 static void gtk_text_layout_real_free_line_data (GtkTextLayout *layout,
104 GtkTextLineData *line_data);
106 static void gtk_text_layout_invalidate_all (GtkTextLayout *layout);
108 static PangoAttribute *gtk_text_attr_appearance_new (const GtkTextAppearance *appearance);
122 static void gtk_text_layout_init (GtkTextLayout *text_layout);
123 static void gtk_text_layout_class_init (GtkTextLayoutClass *klass);
124 static void gtk_text_layout_finalize (GObject *object);
127 static GtkObjectClass *parent_class = NULL;
128 static guint signals[LAST_SIGNAL] = { 0 };
130 PangoAttrType gtk_text_attr_appearance_type = 0;
133 gtk_text_layout_get_type (void)
135 static GType our_type = 0;
139 static const GTypeInfo our_info =
141 sizeof (GtkTextLayoutClass),
142 (GBaseInitFunc) NULL,
143 (GBaseFinalizeFunc) NULL,
144 (GClassInitFunc) gtk_text_layout_class_init,
145 NULL, /* class_finalize */
146 NULL, /* class_data */
147 sizeof (GtkTextLayout),
149 (GInstanceInitFunc) gtk_text_layout_init
152 our_type = g_type_register_static (G_TYPE_OBJECT,
162 gtk_text_layout_class_init (GtkTextLayoutClass *klass)
164 GObjectClass *object_class = G_OBJECT_CLASS (klass);
166 parent_class = g_type_class_peek_parent (klass);
168 object_class->finalize = gtk_text_layout_finalize;
170 klass->wrap = gtk_text_layout_real_wrap;
171 klass->invalidate = gtk_text_layout_real_invalidate;
172 klass->free_line_data = gtk_text_layout_real_free_line_data;
174 signals[INVALIDATED] =
175 g_signal_newc ("invalidated",
176 G_OBJECT_CLASS_TYPE (object_class),
178 G_STRUCT_OFFSET (GtkTextLayoutClass, invalidated),
180 gtk_marshal_VOID__VOID,
185 g_signal_newc ("changed",
186 G_OBJECT_CLASS_TYPE (object_class),
188 G_STRUCT_OFFSET (GtkTextLayoutClass, changed),
190 gtk_marshal_VOID__INT_INT_INT,
197 signals[ALLOCATE_CHILD] =
198 g_signal_newc ("allocate_child",
199 G_OBJECT_CLASS_TYPE (object_class),
201 G_STRUCT_OFFSET (GtkTextLayoutClass, allocate_child),
203 gtk_marshal_VOID__OBJECT_INT_INT,
212 gtk_text_layout_init (GtkTextLayout *text_layout)
214 text_layout->cursor_visible = TRUE;
218 gtk_text_layout_new (void)
220 return GTK_TEXT_LAYOUT (g_object_new (gtk_text_layout_get_type (), NULL));
224 free_style_cache (GtkTextLayout *text_layout)
226 if (text_layout->one_style_cache)
228 gtk_text_attributes_unref (text_layout->one_style_cache);
229 text_layout->one_style_cache = NULL;
234 gtk_text_layout_finalize (GObject *object)
236 GtkTextLayout *layout;
238 layout = GTK_TEXT_LAYOUT (object);
240 gtk_text_layout_set_buffer (layout, NULL);
242 if (layout->default_style)
243 gtk_text_attributes_unref (layout->default_style);
244 layout->default_style = NULL;
246 if (layout->ltr_context)
248 g_object_unref (G_OBJECT (layout->ltr_context));
249 layout->ltr_context = NULL;
251 if (layout->rtl_context)
253 g_object_unref (G_OBJECT (layout->rtl_context));
254 layout->rtl_context = NULL;
257 (* G_OBJECT_CLASS (parent_class)->finalize) (object);
261 gtk_text_layout_set_buffer (GtkTextLayout *layout,
262 GtkTextBuffer *buffer)
264 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
265 g_return_if_fail (buffer == NULL || GTK_IS_TEXT_BUFFER (buffer));
267 if (layout->buffer == buffer)
270 free_style_cache (layout);
274 _gtk_text_btree_remove_view (_gtk_text_buffer_get_btree (layout->buffer),
277 g_object_unref (G_OBJECT (layout->buffer));
278 layout->buffer = NULL;
283 layout->buffer = buffer;
285 g_object_ref (G_OBJECT (buffer));
287 _gtk_text_btree_add_view (_gtk_text_buffer_get_btree (buffer), layout);
292 gtk_text_layout_default_style_changed (GtkTextLayout *layout)
294 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
296 gtk_text_layout_invalidate_all (layout);
300 gtk_text_layout_set_default_style (GtkTextLayout *layout,
301 GtkTextAttributes *values)
303 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
304 g_return_if_fail (values != NULL);
306 if (values == layout->default_style)
309 gtk_text_attributes_ref (values);
311 if (layout->default_style)
312 gtk_text_attributes_unref (layout->default_style);
314 layout->default_style = values;
316 gtk_text_layout_default_style_changed (layout);
320 gtk_text_layout_set_contexts (GtkTextLayout *layout,
321 PangoContext *ltr_context,
322 PangoContext *rtl_context)
324 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
326 if (layout->ltr_context)
327 g_object_unref (G_OBJECT (ltr_context));
329 layout->ltr_context = ltr_context;
330 g_object_ref (G_OBJECT (ltr_context));
332 if (layout->rtl_context)
333 g_object_unref (G_OBJECT (rtl_context));
335 layout->rtl_context = rtl_context;
336 g_object_ref (G_OBJECT (rtl_context));
338 gtk_text_layout_invalidate_all (layout);
342 gtk_text_layout_set_screen_width (GtkTextLayout *layout, gint width)
344 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
345 g_return_if_fail (width >= 0);
346 g_return_if_fail (layout->wrap_loop_count == 0);
348 if (layout->screen_width == width)
351 layout->screen_width = width;
353 gtk_text_layout_invalidate_all (layout);
357 * gtk_text_layout_set_cursor_visible:
358 * @layout: a #GtkTextLayout
359 * @cursor_visible: If %FALSE, then the insertion cursor will not
360 * be shown, even if the text is editable.
362 * Sets whether the insertion cursor should be shown. Generally,
363 * widgets using #GtkTextLayout will hide the cursor when the
364 * widget does not have the input focus.
367 gtk_text_layout_set_cursor_visible (GtkTextLayout *layout,
368 gboolean cursor_visible)
370 cursor_visible = (cursor_visible != FALSE);
372 if (layout->cursor_visible != cursor_visible)
377 layout->cursor_visible = cursor_visible;
379 /* Now queue a redraw on the paragraph containing the cursor
381 gtk_text_buffer_get_iter_at_mark (layout->buffer, &iter,
382 gtk_text_buffer_get_mark (layout->buffer, "insert"));
384 gtk_text_layout_get_line_yrange (layout, &iter, &y, &height);
385 gtk_text_layout_changed (layout, y, height, height);
387 gtk_text_layout_invalidate_cache (layout, _gtk_text_iter_get_text_line (&iter));
392 * gtk_text_layout_get_cursor_visible:
393 * @layout: a #GtkTextLayout
395 * Returns whether the insertion cursor will be shown.
397 * Return value: if %FALSE, the insertion cursor will not be
398 shown, even if the text is editable.
401 gtk_text_layout_get_cursor_visible (GtkTextLayout *layout)
403 return layout->cursor_visible;
407 * gtk_text_layout_set_preedit_string:
408 * @layout: a #PangoLayout
409 * @preedit_string: a string to display at the insertion point
410 * @preedit_attrs: a #PangoAttrList of attributes that apply to @preedit_string
411 * @cursor_pos: position of cursor within preedit string in chars
413 * Set the preedit string and attributes. The preedit string is a
414 * string showing text that is currently being edited and not
415 * yet committed into the buffer.
418 gtk_text_layout_set_preedit_string (GtkTextLayout *layout,
419 const gchar *preedit_string,
420 PangoAttrList *preedit_attrs,
425 GtkTextLineData *line_data;
427 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
428 g_return_if_fail (preedit_attrs != NULL || preedit_string == NULL);
430 if (layout->preedit_string)
431 g_free (layout->preedit_string);
433 if (layout->preedit_attrs)
434 pango_attr_list_unref (layout->preedit_attrs);
438 layout->preedit_string = g_strdup (preedit_string);
439 layout->preedit_len = strlen (layout->preedit_string);
440 pango_attr_list_ref (preedit_attrs);
441 layout->preedit_attrs = preedit_attrs;
443 cursor_pos = CLAMP (cursor_pos, 0, g_utf8_strlen (layout->preedit_string, -1));
444 layout->preedit_cursor = g_utf8_offset_to_pointer (layout->preedit_string, cursor_pos) - layout->preedit_string;
448 layout->preedit_string = NULL;
449 layout->preedit_len = 0;
450 layout->preedit_attrs = NULL;
451 layout->preedit_cursor = 0;
454 /* Now invalidate the paragraph containing the cursor
456 gtk_text_buffer_get_iter_at_mark (layout->buffer, &iter,
457 gtk_text_buffer_get_mark (layout->buffer, "insert"));
459 line = _gtk_text_iter_get_text_line (&iter);
460 line_data = _gtk_text_line_get_data (line, layout);
463 gtk_text_layout_invalidate_cache (layout, line);
464 _gtk_text_line_invalidate_wrap (line, line_data);
465 gtk_text_layout_invalidated (layout);
470 gtk_text_layout_get_size (GtkTextLayout *layout,
474 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
477 *width = layout->width;
480 *height = layout->height;
484 gtk_text_layout_invalidated (GtkTextLayout *layout)
486 g_signal_emit (G_OBJECT (layout), signals[INVALIDATED], 0);
490 gtk_text_layout_changed (GtkTextLayout *layout,
495 g_signal_emit (G_OBJECT (layout), signals[CHANGED], 0,
496 y, old_height, new_height);
500 gtk_text_layout_free_line_data (GtkTextLayout *layout,
502 GtkTextLineData *line_data)
504 (* GTK_TEXT_LAYOUT_GET_CLASS (layout)->free_line_data)
505 (layout, line, line_data);
509 gtk_text_layout_invalidate (GtkTextLayout *layout,
510 const GtkTextIter *start_index,
511 const GtkTextIter *end_index)
513 (* GTK_TEXT_LAYOUT_GET_CLASS (layout)->invalidate)
514 (layout, start_index, end_index);
518 gtk_text_layout_wrap (GtkTextLayout *layout,
521 GtkTextLineData *line_data)
523 return (* GTK_TEXT_LAYOUT_GET_CLASS (layout)->wrap) (layout, line, line_data);
527 gtk_text_layout_get_lines (GtkTextLayout *layout,
528 /* [top_y, bottom_y) */
533 GtkTextLine *first_btree_line;
534 GtkTextLine *last_btree_line;
538 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), NULL);
539 g_return_val_if_fail (bottom_y > top_y, NULL);
544 _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
545 layout, top_y, first_line_y);
546 if (first_btree_line == NULL)
548 g_assert (top_y > 0);
553 /* -1 since bottom_y is one past */
555 _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
556 layout, bottom_y - 1, NULL);
558 if (!last_btree_line)
560 _gtk_text_btree_get_line (_gtk_text_buffer_get_btree (layout->buffer),
561 _gtk_text_btree_line_count (_gtk_text_buffer_get_btree (layout->buffer)) - 1,
565 GtkTextLineData *ld = _gtk_text_line_get_data (last_btree_line, layout);
570 g_assert (last_btree_line != NULL);
572 line = first_btree_line;
575 retval = g_slist_prepend (retval, line);
577 if (line == last_btree_line)
580 line = _gtk_text_line_next (line);
583 retval = g_slist_reverse (retval);
589 invalidate_cached_style (GtkTextLayout *layout)
591 free_style_cache (layout);
594 /* These should be called around a loop which wraps a CONTIGUOUS bunch
595 * of display lines. If the lines aren't contiguous you can't call
599 gtk_text_layout_wrap_loop_start (GtkTextLayout *layout)
601 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
602 g_return_if_fail (layout->one_style_cache == NULL);
604 layout->wrap_loop_count += 1;
608 gtk_text_layout_wrap_loop_end (GtkTextLayout *layout)
610 g_return_if_fail (layout->wrap_loop_count > 0);
612 layout->wrap_loop_count -= 1;
614 if (layout->wrap_loop_count == 0)
616 /* We cache a some stuff if we're iterating over some lines wrapping
617 * them. This cleans it up.
619 /* Nuke our cached style */
620 invalidate_cached_style (layout);
621 g_assert (layout->one_style_cache == NULL);
626 gtk_text_layout_invalidate_all (GtkTextLayout *layout)
631 if (layout->buffer == NULL)
634 gtk_text_buffer_get_bounds (layout->buffer, &start, &end);
636 gtk_text_layout_invalidate (layout, &start, &end);
640 gtk_text_layout_invalidate_cache (GtkTextLayout *layout,
643 if (layout->one_display_cache && line == layout->one_display_cache->line)
645 GtkTextLineDisplay *tmp_display = layout->one_display_cache;
646 layout->one_display_cache = NULL;
647 gtk_text_layout_free_line_display (layout, tmp_display);
652 gtk_text_layout_real_invalidate (GtkTextLayout *layout,
653 const GtkTextIter *start,
654 const GtkTextIter *end)
657 GtkTextLine *last_line;
659 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
660 g_return_if_fail (layout->wrap_loop_count == 0);
663 gtk_text_view_index_spew (start_index, "invalidate start");
664 gtk_text_view_index_spew (end_index, "invalidate end");
667 last_line = _gtk_text_iter_get_text_line (end);
668 line = _gtk_text_iter_get_text_line (start);
672 GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
675 (line != last_line || !gtk_text_iter_starts_line (end)))
677 gtk_text_layout_invalidate_cache (layout, line);
678 _gtk_text_line_invalidate_wrap (line, line_data);
681 if (line == last_line)
684 line = _gtk_text_line_next (line);
687 gtk_text_layout_invalidated (layout);
691 gtk_text_layout_real_free_line_data (GtkTextLayout *layout,
693 GtkTextLineData *line_data)
695 if (layout->one_display_cache && line == layout->one_display_cache->line)
697 GtkTextLineDisplay *tmp_display = layout->one_display_cache;
698 layout->one_display_cache = NULL;
699 gtk_text_layout_free_line_display (layout, tmp_display);
708 * gtk_text_layout_is_valid:
709 * @layout: a #GtkTextLayout
711 * Check if there are any invalid regions in a #GtkTextLayout's buffer
713 * Return value: #TRUE if any invalid regions were found
716 gtk_text_layout_is_valid (GtkTextLayout *layout)
718 g_return_val_if_fail (layout != NULL, FALSE);
719 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
721 return _gtk_text_btree_is_valid (_gtk_text_buffer_get_btree (layout->buffer),
726 update_layout_size (GtkTextLayout *layout)
728 _gtk_text_btree_get_view_size (_gtk_text_buffer_get_btree (layout->buffer),
730 &layout->width, &layout->height);
734 * gtk_text_layout_validate_yrange:
735 * @layout: a #GtkTextLayout
736 * @anchor: iter pointing into a line that will be used as the
738 * @y0: offset from the top of the line pointed to by @anchor at
739 * which to begin validation. (The offset here is in pixels
741 * @y1: offset from the top of the line pointed to by @anchor at
742 * which to end validation. (The offset here is in pixels
745 * Ensure that a region of a #GtkTextLayout is valid. The ::changed
746 * signal will be emitted if any lines are validated.
749 gtk_text_layout_validate_yrange (GtkTextLayout *layout,
755 GtkTextLine *first_line = NULL;
756 GtkTextLine *last_line = NULL;
758 gint delta_height = 0;
759 gint first_line_y = 0; /* Quiet GCC */
760 gint last_line_y = 0; /* Quiet GCC */
762 g_return_if_fail (layout != NULL);
763 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
770 /* Validate backwards from the anchor line to y0
772 line = _gtk_text_iter_get_text_line (anchor);
774 while (line && seen < -y0)
776 GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
777 if (!line_data || !line_data->valid)
779 gint old_height = line_data ? line_data->height : 0;
781 _gtk_text_btree_validate_line (_gtk_text_buffer_get_btree (layout->buffer),
783 line_data = _gtk_text_line_get_data (line, layout);
785 delta_height += line_data->height - old_height;
788 first_line_y = -seen;
792 last_line_y = -seen + line_data->height;
796 seen += line_data->height;
797 line = _gtk_text_line_previous (line);
800 /* Validate forwards to y1 */
801 line = _gtk_text_iter_get_text_line (anchor);
803 while (line && seen < y1)
805 GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
806 if (!line_data || !line_data->valid)
808 gint old_height = line_data ? line_data->height : 0;
810 _gtk_text_btree_validate_line (_gtk_text_buffer_get_btree (layout->buffer),
812 line_data = _gtk_text_line_get_data (line, layout);
814 delta_height += line_data->height - old_height;
822 last_line_y = seen + line_data->height;
825 seen += line_data->height;
826 line = _gtk_text_line_next (line);
829 /* If we found and validated any invalid lines, update size and
830 * emit the changed signal
836 update_layout_size (layout);
838 line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
841 gtk_text_layout_changed (layout,
843 last_line_y - first_line_y - delta_height,
844 last_line_y - first_line_y);
849 * gtk_text_layout_validate:
850 * @tree: a #GtkTextLayout
851 * @max_pixels: the maximum number of pixels to validate. (No more
852 * than one paragraph beyond this limit will be validated)
854 * Validate regions of a #GtkTextLayout. The ::changed signal will
855 * be emitted for each region validated.
858 gtk_text_layout_validate (GtkTextLayout *layout,
861 gint y, old_height, new_height;
863 g_return_if_fail (layout != NULL);
864 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
866 while (max_pixels > 0 &&
867 _gtk_text_btree_validate (_gtk_text_buffer_get_btree (layout->buffer),
869 &y, &old_height, &new_height))
871 max_pixels -= new_height;
873 update_layout_size (layout);
874 gtk_text_layout_changed (layout, y, old_height, new_height);
878 static GtkTextLineData*
879 gtk_text_layout_real_wrap (GtkTextLayout *layout,
882 GtkTextLineData *line_data)
884 GtkTextLineDisplay *display;
886 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), NULL);
888 if (line_data == NULL)
890 line_data = gtk_text_line_data_new (layout, line);
891 _gtk_text_line_add_data (line, line_data);
894 display = gtk_text_layout_get_line_display (layout, line, TRUE);
895 line_data->width = display->width;
896 line_data->height = display->height;
897 line_data->valid = TRUE;
898 gtk_text_layout_free_line_display (layout, display);
904 * Layout utility functions
907 /* If you get the style with get_style () you need to call
908 release_style () to free it. */
909 static GtkTextAttributes*
910 get_style (GtkTextLayout *layout,
911 const GtkTextIter *iter)
915 GtkTextAttributes *style;
917 /* If we have the one-style cache, then it means
918 that we haven't seen a toggle since we filled in the
921 if (layout->one_style_cache != NULL)
923 gtk_text_attributes_ref (layout->one_style_cache);
924 return layout->one_style_cache;
927 g_assert (layout->one_style_cache == NULL);
929 /* Get the tags at this spot */
930 tags = _gtk_text_btree_get_tags (iter, &tag_count);
932 /* No tags, use default style */
933 if (tags == NULL || tag_count == 0)
935 /* One ref for the return value, one ref for the
936 layout->one_style_cache reference */
937 gtk_text_attributes_ref (layout->default_style);
938 gtk_text_attributes_ref (layout->default_style);
939 layout->one_style_cache = layout->default_style;
944 return layout->default_style;
947 /* Sort tags in ascending order of priority */
948 _gtk_text_tag_array_sort (tags, tag_count);
950 style = gtk_text_attributes_new ();
952 gtk_text_attributes_copy_values (layout->default_style,
955 _gtk_text_attributes_fill_from_tags (style,
961 g_assert (style->refcount == 1);
963 /* Leave this style as the last one seen */
964 g_assert (layout->one_style_cache == NULL);
965 gtk_text_attributes_ref (style); /* ref held by layout->one_style_cache */
966 layout->one_style_cache = style;
968 /* Returning yet another refcount */
973 release_style (GtkTextLayout *layout,
974 GtkTextAttributes *style)
976 g_return_if_fail (style != NULL);
977 g_return_if_fail (style->refcount > 0);
979 gtk_text_attributes_unref (style);
986 /* This function tries to optimize the case where a line
987 is completely invisible */
989 totally_invisible_line (GtkTextLayout *layout,
993 GtkTextLineSegment *seg;
996 /* If we have a cached style, then we know it does actually apply
997 * and we can just see if it is invisible.
999 if (layout->one_style_cache &&
1000 !layout->one_style_cache->invisible)
1002 /* Without the cache, we check if the first char is visible, if so
1003 * we are partially visible. Note that we have to check this since
1004 * we don't know the current invisible/noninvisible toggle state; this
1005 * function can use the whole btree to get it right.
1009 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
1012 if (!_gtk_text_btree_char_is_invisible (iter))
1017 seg = line->segments;
1021 if (seg->byte_count > 0)
1022 bytes += seg->byte_count;
1024 /* Note that these two tests can cause us to bail out
1025 * when we shouldn't, because a higher-priority tag
1026 * may override these settings. However the important
1027 * thing is to only invisible really-invisible lines, rather
1028 * than to invisible all really-invisible lines.
1031 else if (seg->type == >k_text_toggle_on_type)
1033 invalidate_cached_style (layout);
1035 /* Bail out if an elision-unsetting tag begins */
1036 if (seg->body.toggle.info->tag->invisible_set &&
1037 !seg->body.toggle.info->tag->values->invisible)
1040 else if (seg->type == >k_text_toggle_off_type)
1042 invalidate_cached_style (layout);
1044 /* Bail out if an elision-setting tag ends */
1045 if (seg->body.toggle.info->tag->invisible_set &&
1046 seg->body.toggle.info->tag->values->invisible)
1053 if (seg != NULL) /* didn't reach line end */
1060 set_para_values (GtkTextLayout *layout,
1061 GtkTextAttributes *style,
1062 GtkTextLineDisplay *display,
1065 PangoAlignment pango_align = PANGO_ALIGN_LEFT;
1068 display->direction = style->direction;
1070 if (display->direction == GTK_TEXT_DIR_LTR)
1071 display->layout = pango_layout_new (layout->ltr_context);
1073 display->layout = pango_layout_new (layout->rtl_context);
1075 switch (style->justification)
1077 case GTK_JUSTIFY_LEFT:
1078 pango_align = (style->direction == GTK_TEXT_DIR_LTR) ? PANGO_ALIGN_LEFT : PANGO_ALIGN_RIGHT;
1080 case GTK_JUSTIFY_RIGHT:
1081 pango_align = (style->direction == GTK_TEXT_DIR_LTR) ? PANGO_ALIGN_RIGHT : PANGO_ALIGN_LEFT;
1083 case GTK_JUSTIFY_CENTER:
1084 pango_align = PANGO_ALIGN_CENTER;
1086 case GTK_JUSTIFY_FILL:
1087 g_warning ("FIXME we don't support GTK_JUSTIFY_FILL yet");
1090 g_assert_not_reached ();
1094 switch (pango_align)
1096 case PANGO_ALIGN_LEFT:
1099 case PANGO_ALIGN_RIGHT:
1102 case PANGO_ALIGN_CENTER:
1107 pango_layout_set_alignment (display->layout, pango_align);
1108 pango_layout_set_spacing (display->layout,
1109 style->pixels_inside_wrap * PANGO_SCALE);
1112 pango_layout_set_tabs (display->layout, style->tabs);
1114 display->top_margin = style->pixels_above_lines;
1115 display->height = style->pixels_above_lines + style->pixels_below_lines;
1116 display->bottom_margin = style->pixels_below_lines;
1117 display->left_margin = style->left_margin;
1118 display->right_margin = style->right_margin;
1120 display->x_offset = display->left_margin;
1122 pango_layout_set_indent (display->layout,
1123 style->indent * PANGO_SCALE);
1125 switch (style->wrap_mode)
1128 layout_width = layout->screen_width - display->left_margin - display->right_margin;
1129 pango_layout_set_width (display->layout, layout_width * PANGO_SCALE);
1130 pango_layout_set_wrap (display->layout, PANGO_WRAP_CHAR);
1134 layout_width = layout->screen_width - display->left_margin - display->right_margin;
1135 pango_layout_set_width (display->layout, layout_width * PANGO_SCALE);
1136 pango_layout_set_wrap (display->layout, PANGO_WRAP_WORD);
1143 display->total_width = MAX (layout->screen_width, layout->width) - display->left_margin - display->right_margin;
1146 static PangoAttribute *
1147 gtk_text_attr_appearance_copy (const PangoAttribute *attr)
1149 const GtkTextAttrAppearance *appearance_attr = (const GtkTextAttrAppearance *)attr;
1151 return gtk_text_attr_appearance_new (&appearance_attr->appearance);
1155 gtk_text_attr_appearance_destroy (PangoAttribute *attr)
1157 GtkTextAppearance *appearance = &((GtkTextAttrAppearance *)attr)->appearance;
1159 if (appearance->bg_stipple)
1160 gdk_drawable_unref (appearance->bg_stipple);
1161 if (appearance->fg_stipple)
1162 gdk_drawable_unref (appearance->fg_stipple);
1168 gtk_text_attr_appearance_compare (const PangoAttribute *attr1,
1169 const PangoAttribute *attr2)
1171 const GtkTextAppearance *appearance1 = &((const GtkTextAttrAppearance *)attr1)->appearance;
1172 const GtkTextAppearance *appearance2 = &((const GtkTextAttrAppearance *)attr2)->appearance;
1174 return (gdk_color_equal (&appearance1->fg_color, &appearance2->fg_color) &&
1175 gdk_color_equal (&appearance1->bg_color, &appearance2->bg_color) &&
1176 appearance1->fg_stipple == appearance2->fg_stipple &&
1177 appearance1->bg_stipple == appearance2->bg_stipple &&
1178 appearance1->underline == appearance2->underline &&
1179 appearance1->strikethrough == appearance2->strikethrough &&
1180 appearance1->draw_bg == appearance2->draw_bg);
1185 * gtk_text_attr_appearance_new:
1188 * Create a new font description attribute. (This attribute
1189 * allows setting family, style, weight, variant, stretch,
1190 * and size simultaneously.)
1194 static PangoAttribute *
1195 gtk_text_attr_appearance_new (const GtkTextAppearance *appearance)
1197 static PangoAttrClass klass = {
1199 gtk_text_attr_appearance_copy,
1200 gtk_text_attr_appearance_destroy,
1201 gtk_text_attr_appearance_compare
1204 GtkTextAttrAppearance *result;
1207 klass.type = gtk_text_attr_appearance_type =
1208 pango_attr_type_register ("GtkTextAttrAppearance");
1210 result = g_new (GtkTextAttrAppearance, 1);
1211 result->attr.klass = &klass;
1213 result->appearance = *appearance;
1215 if (appearance->bg_stipple)
1216 gdk_drawable_ref (appearance->bg_stipple);
1217 if (appearance->fg_stipple)
1218 gdk_drawable_ref (appearance->fg_stipple);
1220 return (PangoAttribute *)result;
1225 add_generic_attrs (GtkTextLayout *layout,
1226 GtkTextAppearance *appearance,
1228 PangoAttrList *attrs,
1233 PangoAttribute *attr;
1235 if (appearance->underline != PANGO_UNDERLINE_NONE)
1237 attr = pango_attr_underline_new (appearance->underline);
1239 attr->start_index = start;
1240 attr->end_index = start + byte_count;
1242 pango_attr_list_insert (attrs, attr);
1245 if (appearance->rise != 0)
1247 attr = pango_attr_rise_new (appearance->rise);
1249 attr->start_index = start;
1250 attr->end_index = start + byte_count;
1252 pango_attr_list_insert (attrs, attr);
1257 attr = gtk_text_attr_appearance_new (appearance);
1259 attr->start_index = start;
1260 attr->end_index = start + byte_count;
1262 ((GtkTextAttrAppearance *)attr)->appearance.is_text = is_text;
1264 pango_attr_list_insert (attrs, attr);
1269 add_text_attrs (GtkTextLayout *layout,
1270 GtkTextAttributes *style,
1272 PangoAttrList *attrs,
1276 PangoAttribute *attr;
1278 attr = pango_attr_font_desc_new (&style->font);
1279 attr->start_index = start;
1280 attr->end_index = start + byte_count;
1282 pango_attr_list_insert (attrs, attr);
1286 add_pixbuf_attrs (GtkTextLayout *layout,
1287 GtkTextLineDisplay *display,
1288 GtkTextAttributes *style,
1289 GtkTextLineSegment *seg,
1290 PangoAttrList *attrs,
1293 PangoAttribute *attr;
1294 PangoRectangle logical_rect;
1295 GtkTextPixbuf *pixbuf = &seg->body.pixbuf;
1298 width = gdk_pixbuf_get_width (pixbuf->pixbuf);
1299 height = gdk_pixbuf_get_height (pixbuf->pixbuf);
1302 logical_rect.y = -height * PANGO_SCALE;
1303 logical_rect.width = width * PANGO_SCALE;
1304 logical_rect.height = height * PANGO_SCALE;
1306 attr = pango_attr_shape_new (&logical_rect, &logical_rect);
1307 attr->start_index = start;
1308 attr->end_index = start + seg->byte_count;
1309 pango_attr_list_insert (attrs, attr);
1311 display->shaped_objects =
1312 g_slist_append (display->shaped_objects, pixbuf->pixbuf);
1316 add_child_attrs (GtkTextLayout *layout,
1317 GtkTextLineDisplay *display,
1318 GtkTextAttributes *style,
1319 GtkTextLineSegment *seg,
1320 PangoAttrList *attrs,
1323 PangoAttribute *attr;
1324 PangoRectangle logical_rect;
1325 GtkTextChildAnchor *anchor;
1332 anchor = seg->body.child.obj;
1334 tmp_list = seg->body.child.widgets;
1335 while (tmp_list != NULL)
1337 GtkWidget *child = tmp_list->data;
1339 if (_gtk_anchored_child_get_layout (child) == layout)
1344 gtk_widget_get_child_requisition (child, &req);
1347 height = req.height;
1349 display->shaped_objects =
1350 g_slist_append (display->shaped_objects, child);
1355 tmp_list = g_slist_next (tmp_list);
1358 if (tmp_list == NULL)
1360 /* No widget at this anchor in this display;
1367 if (layout->preedit_string)
1369 g_free (layout->preedit_string);
1370 layout->preedit_string = NULL;
1373 if (layout->preedit_attrs)
1375 pango_attr_list_unref (layout->preedit_attrs);
1376 layout->preedit_attrs = NULL;
1380 logical_rect.y = -height * PANGO_SCALE;
1381 logical_rect.width = width * PANGO_SCALE;
1382 logical_rect.height = height * PANGO_SCALE;
1384 attr = pango_attr_shape_new (&logical_rect, &logical_rect);
1385 attr->start_index = start;
1386 attr->end_index = start + seg->byte_count;
1387 pango_attr_list_insert (attrs, attr);
1391 add_cursor (GtkTextLayout *layout,
1392 GtkTextLineDisplay *display,
1393 GtkTextLineSegment *seg,
1396 PangoRectangle strong_pos, weak_pos;
1397 GtkTextCursorDisplay *cursor;
1399 /* Hide insertion cursor when we have a selection or the layout
1400 * user has hidden the cursor.
1402 if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
1403 seg->body.mark.obj) &&
1404 (!layout->cursor_visible ||
1405 gtk_text_buffer_get_selection_bounds (layout->buffer, NULL, NULL)))
1408 pango_layout_get_cursor_pos (display->layout, start, &strong_pos, &weak_pos);
1410 cursor = g_new (GtkTextCursorDisplay, 1);
1412 cursor->x = PANGO_PIXELS (strong_pos.x);
1413 cursor->y = PANGO_PIXELS (strong_pos.y);
1414 cursor->height = PANGO_PIXELS (strong_pos.height);
1415 cursor->is_strong = TRUE;
1416 display->cursors = g_slist_prepend (display->cursors, cursor);
1418 if (weak_pos.x == strong_pos.x)
1419 cursor->is_weak = TRUE;
1422 cursor->is_weak = FALSE;
1424 cursor = g_new (GtkTextCursorDisplay, 1);
1426 cursor->x = PANGO_PIXELS (weak_pos.x);
1427 cursor->y = PANGO_PIXELS (weak_pos.y);
1428 cursor->height = PANGO_PIXELS (weak_pos.height);
1429 cursor->is_strong = FALSE;
1430 cursor->is_weak = TRUE;
1431 display->cursors = g_slist_prepend (display->cursors, cursor);
1436 is_shape (PangoLayoutRun *run)
1438 GSList *tmp_list = run->item->extra_attrs;
1442 PangoAttribute *attr = tmp_list->data;
1444 if (attr->klass->type == PANGO_ATTR_SHAPE)
1447 tmp_list = tmp_list->next;
1454 allocate_child_widgets (GtkTextLayout *text_layout,
1455 GtkTextLineDisplay *display)
1457 GSList *shaped = display->shaped_objects;
1458 PangoLayout *layout = display->layout;
1459 PangoLayoutIter *iter;
1461 iter = pango_layout_get_iter (layout);
1465 PangoLayoutRun *run = pango_layout_iter_get_run (iter);
1467 if (run && is_shape (run))
1469 GObject *shaped_object = shaped->data;
1470 shaped = shaped->next;
1472 if (GTK_IS_WIDGET (shaped_object))
1474 PangoRectangle extents;
1476 /* We emit "allocate_child" with the x,y of
1477 * the widget with respect to the top of the line
1478 * and the left side of the buffer
1481 pango_layout_iter_get_run_extents (iter,
1485 g_signal_emit (G_OBJECT (text_layout),
1486 signals[ALLOCATE_CHILD],
1489 PANGO_PIXELS (extents.x) + display->x_offset,
1490 PANGO_PIXELS (extents.y) + display->top_margin);
1494 while (pango_layout_iter_next_run (iter));
1496 pango_layout_iter_free (iter);
1500 convert_color (GdkColor *result,
1501 PangoAttrColor *attr)
1503 result->red = attr->color.red;
1504 result->blue = attr->color.blue;
1505 result->green = attr->color.green;
1508 /* This function is used to convert the preedit string attributes, which are
1509 * standard PangoAttributes, into the custom attributes used by the text
1510 * widget and insert them into a attr list with a given offset.
1513 add_preedit_attrs (GtkTextLayout *layout,
1514 GtkTextAttributes *style,
1515 PangoAttrList *attrs,
1519 PangoAttrIterator *iter = pango_attr_list_get_iterator (layout->preedit_attrs);
1523 GtkTextAppearance appearance = style->appearance;
1524 PangoFontDescription font_desc;
1525 PangoAttribute *insert_attr;
1526 GSList *extra_attrs = NULL;
1530 pango_attr_iterator_range (iter, &start, &end);
1532 if (end == G_MAXINT)
1533 end = layout->preedit_len;
1535 pango_attr_iterator_get_font (iter, &style->font,
1536 &font_desc, &extra_attrs);
1538 tmp_list = extra_attrs;
1541 PangoAttribute *attr = tmp_list->data;
1543 switch (attr->klass->type)
1545 case PANGO_ATTR_FOREGROUND:
1546 convert_color (&appearance.fg_color, (PangoAttrColor *)attr);
1548 case PANGO_ATTR_BACKGROUND:
1549 convert_color (&appearance.bg_color, (PangoAttrColor *)attr);
1550 appearance.draw_bg = TRUE;
1552 case PANGO_ATTR_UNDERLINE:
1553 appearance.underline = ((PangoAttrInt *)attr)->value;
1555 case PANGO_ATTR_STRIKETHROUGH:
1556 appearance.strikethrough = ((PangoAttrInt *)attr)->value;
1558 case PANGO_ATTR_RISE:
1559 appearance.rise = ((PangoAttrInt *)attr)->value;
1565 pango_attribute_destroy (attr);
1566 tmp_list = tmp_list->next;
1569 g_slist_free (extra_attrs);
1571 insert_attr = pango_attr_font_desc_new (&font_desc);
1572 insert_attr->start_index = start + offset;
1573 insert_attr->end_index = end + offset;
1575 pango_attr_list_insert (attrs, insert_attr);
1577 add_generic_attrs (layout, &appearance, end - start,
1578 attrs, start + offset,
1581 while (pango_attr_iterator_next (iter));
1583 pango_attr_iterator_destroy (iter);
1586 GtkTextLineDisplay *
1587 gtk_text_layout_get_line_display (GtkTextLayout *layout,
1591 GtkTextLineDisplay *display;
1592 GtkTextLineSegment *seg;
1594 GtkTextAttributes *style;
1596 PangoAttrList *attrs;
1597 gint text_allocated, layout_byte_offset, buffer_byte_offset;
1599 PangoRectangle extents;
1600 gboolean para_values_set = FALSE;
1601 GSList *cursor_byte_offsets = NULL;
1602 GSList *cursor_segs = NULL;
1603 GSList *tmp_list1, *tmp_list2;
1604 gboolean saw_widget = FALSE;
1606 g_return_val_if_fail (line != NULL, NULL);
1608 if (layout->one_display_cache)
1610 if (line == layout->one_display_cache->line &&
1611 (size_only || !layout->one_display_cache->size_only))
1612 return layout->one_display_cache;
1615 GtkTextLineDisplay *tmp_display = layout->one_display_cache;
1616 layout->one_display_cache = NULL;
1617 gtk_text_layout_free_line_display (layout, tmp_display);
1621 display = g_new0 (GtkTextLineDisplay, 1);
1623 display->size_only = size_only;
1624 display->line = line;
1625 display->insert_index = -1;
1627 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
1630 /* Special-case optimization for completely
1631 * invisible lines; makes it faster to deal
1632 * with sequences of invisible lines.
1634 if (totally_invisible_line (layout, line, &iter))
1637 /* Allocate space for flat text for buffer
1639 text_allocated = _gtk_text_line_byte_count (line);
1640 text = g_malloc (text_allocated);
1642 attrs = pango_attr_list_new ();
1644 /* Iterate over segments, creating display chunks for them. */
1645 layout_byte_offset = 0; /* current length of layout text (includes preedit, does not include invisible text) */
1646 buffer_byte_offset = 0; /* position in the buffer line */
1647 seg = _gtk_text_iter_get_any_segment (&iter);
1650 /* Displayable segments */
1651 if (seg->type == >k_text_char_type ||
1652 seg->type == >k_text_pixbuf_type ||
1653 seg->type == >k_text_child_type)
1655 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
1657 buffer_byte_offset);
1658 style = get_style (layout, &iter);
1660 /* We have to delay setting the paragraph values until we
1661 * hit the first pixbuf or text segment because toggles at
1662 * the beginning of the paragraph should affect the
1663 * paragraph-global values
1665 if (!para_values_set)
1667 set_para_values (layout, style, display, &align);
1668 para_values_set = TRUE;
1671 /* First see if the chunk is invisible, and ignore it if so. Tk
1672 * looked at tabs, wrap mode, etc. before doing this, but
1673 * that made no sense to me, so I am just skipping the
1676 if (!style->invisible)
1678 if (seg->type == >k_text_char_type)
1680 /* We don't want to split segments because of marks,
1681 * so we scan forward for more segments only
1682 * separated from us by marks. In theory, we should
1683 * also merge segments with identical styles, even
1684 * if there are toggles in-between
1688 GtkTextLineSegment *prev_seg = NULL;
1692 if (seg->type == >k_text_char_type)
1694 memcpy (text + layout_byte_offset, seg->body.chars, seg->byte_count);
1695 layout_byte_offset += seg->byte_count;
1696 buffer_byte_offset += seg->byte_count;
1697 bytes += seg->byte_count;
1699 else if (seg->type == >k_text_right_mark_type ||
1700 seg->type == >k_text_left_mark_type)
1702 /* If we have preedit string, break out of this loop - we'll almost
1703 * certainly have different attributes on the preedit string
1706 if (layout->preedit_len > 0 &&
1707 _gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
1708 seg->body.mark.obj))
1711 if (seg->body.mark.visible)
1713 cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets, GINT_TO_POINTER (layout_byte_offset));
1714 cursor_segs = g_slist_prepend (cursor_segs, seg);
1724 seg = prev_seg; /* Back up one */
1725 add_generic_attrs (layout, &style->appearance,
1727 attrs, layout_byte_offset - bytes,
1729 add_text_attrs (layout, style, bytes, attrs,
1730 layout_byte_offset - bytes, size_only);
1732 else if (seg->type == >k_text_pixbuf_type)
1734 add_generic_attrs (layout,
1737 attrs, layout_byte_offset,
1739 add_pixbuf_attrs (layout, display, style,
1740 seg, attrs, layout_byte_offset);
1741 memcpy (text + layout_byte_offset, gtk_text_unknown_char_utf8,
1743 layout_byte_offset += seg->byte_count;
1744 buffer_byte_offset += seg->byte_count;
1746 else if (seg->type == >k_text_child_type)
1750 add_generic_attrs (layout, &style->appearance,
1752 attrs, layout_byte_offset,
1754 add_child_attrs (layout, display, style,
1755 seg, attrs, layout_byte_offset);
1756 memcpy (text + layout_byte_offset, gtk_text_unknown_char_utf8,
1758 layout_byte_offset += seg->byte_count;
1759 buffer_byte_offset += seg->byte_count;
1763 /* We don't know this segment type */
1764 g_assert_not_reached ();
1767 } /* if (segment was visible) */
1770 /* Invisible segment */
1771 buffer_byte_offset += seg->byte_count;
1774 release_style (layout, style);
1778 else if (seg->type == >k_text_toggle_on_type ||
1779 seg->type == >k_text_toggle_off_type)
1781 /* Style may have changed, drop our
1782 current cached style */
1783 invalidate_cached_style (layout);
1787 else if (seg->type == >k_text_right_mark_type ||
1788 seg->type == >k_text_left_mark_type)
1790 gint cursor_offset = 0;
1792 /* At the insertion point, add the preedit string, if any */
1794 if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
1795 seg->body.mark.obj))
1797 display->insert_index = layout_byte_offset;
1799 if (layout->preedit_len > 0)
1801 text_allocated += layout->preedit_len;
1802 text = g_realloc (text, text_allocated);
1804 style = get_style (layout, &iter);
1805 add_preedit_attrs (layout, style, attrs, layout_byte_offset, size_only);
1806 release_style (layout, style);
1808 memcpy (text + layout_byte_offset, layout->preedit_string, layout->preedit_len);
1809 layout_byte_offset += layout->preedit_len;
1810 /* DO NOT increment the buffer byte offset for preedit */
1812 cursor_offset = layout->preedit_cursor - layout->preedit_len;
1817 /* Display visible marks */
1819 if (seg->body.mark.visible)
1821 cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets,
1822 GINT_TO_POINTER (layout_byte_offset + cursor_offset));
1823 cursor_segs = g_slist_prepend (cursor_segs, seg);
1828 g_error ("Unknown segment type: %s", seg->type->name);
1833 if (!para_values_set)
1835 style = get_style (layout, &iter);
1836 set_para_values (layout, style, display, &align);
1837 release_style (layout, style);
1840 /* Pango doesn't want the trailing paragraph delimiters */
1843 /* Only one character has type G_UNICODE_PARAGRAPH_SEPARATOR in
1844 * Unicode 3.0; update this if that changes.
1846 #define PARAGRAPH_SEPARATOR 0x2029
1849 if (layout_byte_offset > 0)
1851 const char *prev = g_utf8_prev_char (text + layout_byte_offset);
1852 ch = g_utf8_get_char (prev);
1853 if (ch == PARAGRAPH_SEPARATOR || ch == '\r' || ch == '\n')
1854 layout_byte_offset = prev - text; /* chop off */
1856 if (ch == '\n' && layout_byte_offset > 0)
1858 /* Possibly chop a CR as well */
1859 prev = g_utf8_prev_char (text + layout_byte_offset);
1861 --layout_byte_offset;
1866 pango_layout_set_text (display->layout, text, layout_byte_offset);
1867 pango_layout_set_attributes (display->layout, attrs);
1869 tmp_list1 = cursor_byte_offsets;
1870 tmp_list2 = cursor_segs;
1873 add_cursor (layout, display, tmp_list2->data,
1874 GPOINTER_TO_INT (tmp_list1->data));
1875 tmp_list1 = tmp_list1->next;
1876 tmp_list2 = tmp_list2->next;
1878 g_slist_free (cursor_byte_offsets);
1879 g_slist_free (cursor_segs);
1881 pango_layout_get_extents (display->layout, NULL, &extents);
1883 display->x_offset += (display->total_width - PANGO_PIXELS (extents.x + extents.width)) * align;
1885 display->width = PANGO_PIXELS (extents.width) + display->left_margin + display->right_margin;
1886 display->height += PANGO_PIXELS (extents.height);
1888 /* Free this if we aren't in a loop */
1889 if (layout->wrap_loop_count == 0)
1890 invalidate_cached_style (layout);
1893 pango_attr_list_unref (attrs);
1895 layout->one_display_cache = display;
1898 allocate_child_widgets (layout, display);
1904 gtk_text_layout_free_line_display (GtkTextLayout *layout,
1905 GtkTextLineDisplay *display)
1907 if (display != layout->one_display_cache)
1909 if (display->layout)
1910 g_object_unref (G_OBJECT (display->layout));
1912 if (display->cursors)
1914 g_slist_foreach (display->cursors, (GFunc)g_free, NULL);
1915 g_slist_free (display->cursors);
1917 g_slist_free (display->shaped_objects);
1923 /* Functions to convert iter <=> index for the line of a GtkTextLineDisplay
1924 * taking into account the preedit string and invisible text if necessary.
1927 line_display_iter_to_index (GtkTextLayout *layout,
1928 GtkTextLineDisplay *display,
1929 const GtkTextIter *iter)
1933 g_return_val_if_fail (_gtk_text_iter_get_text_line (iter) == display->line, 0);
1935 index = gtk_text_iter_get_visible_line_index (iter);
1937 if (index >= display->insert_index)
1938 index += layout->preedit_len;
1944 line_display_index_to_iter (GtkTextLayout *layout,
1945 GtkTextLineDisplay *display,
1950 if (index >= display->insert_index + layout->preedit_len)
1951 index -= layout->preedit_len;
1952 else if (index > display->insert_index)
1954 index = display->insert_index;
1958 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
1959 iter, display->line, 0);
1961 gtk_text_iter_set_visible_line_index (iter, index);
1963 if (_gtk_text_iter_get_text_line (iter) != display->line)
1965 /* Clamp to end of line - really this clamping should have been done
1966 * before here, maybe in Pango, this is a broken band-aid I think
1968 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
1969 iter, display->line, 0);
1971 if (!gtk_text_iter_ends_line (iter))
1972 gtk_text_iter_forward_to_line_end (iter);
1975 /* FIXME should this be cursor positions? */
1976 gtk_text_iter_forward_chars (iter, trailing);
1979 /* FIXME: This really doesn't belong in this file ... */
1980 static GtkTextLineData*
1981 gtk_text_line_data_new (GtkTextLayout *layout,
1984 GtkTextLineData *line_data;
1986 line_data = g_new (GtkTextLineData, 1);
1988 line_data->view_id = layout;
1989 line_data->next = NULL;
1990 line_data->width = 0;
1991 line_data->height = 0;
1992 line_data->valid = FALSE;
1998 get_line_at_y (GtkTextLayout *layout,
2005 if (y > layout->height)
2008 *line = _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
2009 layout, y, line_top);
2012 *line = _gtk_text_btree_get_line (_gtk_text_buffer_get_btree (layout->buffer),
2013 _gtk_text_btree_line_count (_gtk_text_buffer_get_btree (layout->buffer)) - 1, NULL);
2016 _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2022 * gtk_text_layout_get_line_at_y:
2023 * @layout: a #GtkLayout
2024 * @target_iter: the iterator in which the result is stored
2025 * @y: the y positition
2026 * @line_top: location to store the y coordinate of the
2027 * top of the line. (Can by %NULL.)
2029 * Get the iter at the beginning of the line which is displayed
2033 gtk_text_layout_get_line_at_y (GtkTextLayout *layout,
2034 GtkTextIter *target_iter,
2040 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2041 g_return_if_fail (target_iter != NULL);
2043 get_line_at_y (layout, y, &line, line_top);
2044 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2045 target_iter, line, 0);
2049 gtk_text_layout_get_iter_at_pixel (GtkTextLayout *layout,
2050 GtkTextIter *target_iter,
2054 gint byte_index, trailing;
2056 GtkTextLineDisplay *display;
2058 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2059 g_return_if_fail (target_iter != NULL);
2061 /* Adjust pixels to be on-screen. This gives nice
2062 behavior if the user is dragging with a pointer grab.
2066 if (x > layout->width)
2069 get_line_at_y (layout, y, &line, &line_top);
2071 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2073 x -= display->x_offset;
2074 y -= line_top + display->top_margin;
2076 /* We clamp y to the area of the actual layout so that the layouts
2077 * hit testing works OK on the space above and below the layout
2079 y = CLAMP (y, 0, display->height - display->top_margin - display->bottom_margin - 1);
2081 if (!pango_layout_xy_to_index (display->layout, x * PANGO_SCALE, y * PANGO_SCALE,
2082 &byte_index, &trailing))
2084 byte_index = _gtk_text_line_byte_count (line);
2088 line_display_index_to_iter (layout, display, target_iter, byte_index, trailing);
2090 gtk_text_layout_free_line_display (layout, display);
2094 * gtk_text_layout_get_cursor_locations
2095 * @layout: a #GtkTextLayout
2096 * @iter: a #GtkTextIter
2097 * @strong_pos: location to store the strong cursor position (may be %NULL)
2098 * @weak_pos: location to store the weak cursor position (may be %NULL)
2100 * Given an iterator within a text laout, determine the positions that of the
2101 * strong and weak cursors if the insertion point is at that
2102 * iterator. The position of each cursor is stored as a zero-width
2103 * rectangle. The strong cursor location is the location where
2104 * characters of the directionality equal to the base direction of the
2105 * paragraph are inserted. The weak cursor location is the location
2106 * where characters of the directionality opposite to the base
2107 * direction of the paragraph are inserted.
2110 gtk_text_layout_get_cursor_locations (GtkTextLayout *layout,
2112 GdkRectangle *strong_pos,
2113 GdkRectangle *weak_pos)
2116 GtkTextLineDisplay *display;
2120 PangoRectangle pango_strong_pos;
2121 PangoRectangle pango_weak_pos;
2123 g_return_if_fail (layout != NULL);
2124 g_return_if_fail (iter != NULL);
2126 line = _gtk_text_iter_get_text_line (iter);
2127 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2128 index = line_display_iter_to_index (layout, display, iter);
2130 line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2133 pango_layout_get_cursor_pos (display->layout, index,
2134 strong_pos ? &pango_strong_pos : NULL,
2135 weak_pos ? &pango_weak_pos : NULL);
2139 strong_pos->x = display->x_offset + pango_strong_pos.x / PANGO_SCALE;
2140 strong_pos->y = line_top + display->top_margin + pango_strong_pos.y / PANGO_SCALE;
2141 strong_pos->width = 0;
2142 strong_pos->height = pango_strong_pos.height / PANGO_SCALE;
2147 weak_pos->x = display->x_offset + pango_weak_pos.x / PANGO_SCALE;
2148 weak_pos->y = line_top + display->top_margin + pango_weak_pos.y / PANGO_SCALE;
2149 weak_pos->width = 0;
2150 weak_pos->height = pango_weak_pos.height / PANGO_SCALE;
2153 gtk_text_layout_free_line_display (layout, display);
2157 * gtk_text_layout_get_line_yrange:
2158 * @layout: a #GtkTextLayout
2159 * @iter: a #GtkTextIter
2160 * @y: location to store the top of the paragraph in pixels,
2162 * @height location to store the height of the paragraph in pixels,
2165 * Find the range of y coordinates for the paragraph containing
2169 gtk_text_layout_get_line_yrange (GtkTextLayout *layout,
2170 const GtkTextIter *iter,
2176 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2177 g_return_if_fail (_gtk_text_iter_get_btree (iter) == _gtk_text_buffer_get_btree (layout->buffer));
2179 line = _gtk_text_iter_get_text_line (iter);
2182 *y = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2186 GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
2188 *height = line_data->height;
2195 gtk_text_layout_get_iter_location (GtkTextLayout *layout,
2196 const GtkTextIter *iter,
2199 PangoRectangle pango_rect;
2202 GtkTextLineDisplay *display;
2206 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2207 g_return_if_fail (_gtk_text_iter_get_btree (iter) == _gtk_text_buffer_get_btree (layout->buffer));
2208 g_return_if_fail (rect != NULL);
2210 tree = _gtk_text_iter_get_btree (iter);
2211 line = _gtk_text_iter_get_text_line (iter);
2213 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2215 rect->y = _gtk_text_btree_find_line_top (tree, line, layout);
2217 x_offset = display->x_offset * PANGO_SCALE;
2219 byte_index = gtk_text_iter_get_line_index (iter);
2221 pango_layout_index_to_pos (display->layout, byte_index, &pango_rect);
2223 rect->x = PANGO_PIXELS (x_offset + pango_rect.x);
2224 rect->y += PANGO_PIXELS (pango_rect.y) + display->top_margin;
2225 rect->width = PANGO_PIXELS (pango_rect.width);
2226 rect->height = PANGO_PIXELS (pango_rect.height);
2228 gtk_text_layout_free_line_display (layout, display);
2233 /* Find the iter for the logical beginning of the first display line whose
2234 * top y is >= y. If none exists, move the iter to the logical beginning
2235 * of the last line in the buffer.
2238 find_display_line_below (GtkTextLayout *layout,
2242 GtkTextLine *line, *next;
2243 GtkTextLine *found_line = NULL;
2245 gint found_byte = 0;
2247 line = _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
2248 layout, y, &line_top);
2252 _gtk_text_btree_get_line (_gtk_text_buffer_get_btree (layout->buffer),
2253 _gtk_text_btree_line_count (_gtk_text_buffer_get_btree (layout->buffer)) - 1,
2256 _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
2260 while (line && !found_line)
2262 GtkTextLineDisplay *display = gtk_text_layout_get_line_display (layout, line, FALSE);
2263 PangoLayoutIter *layout_iter;
2265 layout_iter = pango_layout_get_iter (display->layout);
2267 line_top += display->top_margin;
2271 gint first_y, last_y;
2272 PangoLayoutLine *layout_line = pango_layout_iter_get_line (layout_iter);
2274 found_byte = layout_line->start_index;
2282 pango_layout_iter_get_line_yrange (layout_iter, &first_y, &last_y);
2283 line_top += (last_y - first_y) / PANGO_SCALE;
2285 while (pango_layout_iter_next_line (layout_iter));
2287 pango_layout_iter_free (layout_iter);
2289 line_top += display->bottom_margin;
2290 gtk_text_layout_free_line_display (layout, display);
2292 next = _gtk_text_line_next (line);
2299 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2300 iter, found_line, found_byte);
2303 /* Find the iter for the logical beginning of the last display line whose
2304 * top y is >= y. If none exists, move the iter to the logical beginning
2305 * of the first line in the buffer.
2308 find_display_line_above (GtkTextLayout *layout,
2313 GtkTextLine *found_line = NULL;
2315 gint found_byte = 0;
2317 line = _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer), layout, y, &line_top);
2320 line = _gtk_text_btree_get_line (_gtk_text_buffer_get_btree (layout->buffer),
2321 _gtk_text_btree_line_count (_gtk_text_buffer_get_btree (layout->buffer)) - 1, NULL);
2322 line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer), line, layout);
2325 while (line && !found_line)
2327 GtkTextLineDisplay *display = gtk_text_layout_get_line_display (layout, line, FALSE);
2328 PangoRectangle logical_rect;
2329 PangoLayoutIter *layout_iter;
2332 layout_iter = pango_layout_get_iter (display->layout);
2334 line_top -= display->top_margin + display->bottom_margin;
2335 pango_layout_iter_get_layout_extents (layout_iter, NULL, &logical_rect);
2336 line_top -= logical_rect.height / PANGO_SCALE;
2338 tmp_top = line_top + display->top_margin;
2342 gint first_y, last_y;
2343 PangoLayoutLine *layout_line = pango_layout_iter_get_line (layout_iter);
2345 found_byte = layout_line->start_index;
2347 pango_layout_iter_get_line_yrange (layout_iter, &first_y, &last_y);
2349 tmp_top -= (last_y - first_y) / PANGO_SCALE;
2357 while (pango_layout_iter_next_line (layout_iter));
2359 pango_layout_iter_free (layout_iter);
2361 gtk_text_layout_free_line_display (layout, display);
2363 line = _gtk_text_line_previous (line);
2369 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2370 iter, found_line, found_byte);
2372 gtk_text_buffer_get_iter_at_offset (layout->buffer, iter, 0);
2376 * gtk_text_layout_clamp_iter_to_vrange:
2377 * @layout: a #GtkTextLayout
2378 * @iter: a #GtkTextIter
2379 * @top: the top of the range
2380 * @bottom: the bottom the range
2382 * If the iterator is not fully in the range @top <= y < @bottom,
2383 * then, if possible, move it the minimum distance so that the
2384 * iterator in this range.
2386 * Returns: %TRUE if the iterator was moved, otherwise %FALSE.
2389 gtk_text_layout_clamp_iter_to_vrange (GtkTextLayout *layout,
2394 GdkRectangle iter_rect;
2396 gtk_text_layout_get_iter_location (layout, iter, &iter_rect);
2398 /* If the iter is at least partially above the range, put the iter
2399 * at the first fully visible line after the range.
2401 if (iter_rect.y < top)
2403 find_display_line_below (layout, iter, top);
2407 /* Otherwise, if the iter is at least partially below the screen, put the
2408 * iter on the last logical position of the last completely visible
2411 else if (iter_rect.y + iter_rect.height > bottom)
2413 find_display_line_above (layout, iter, bottom);
2422 * gtk_text_layout_move_iter_to_previous_line:
2423 * @layout: a #GtkLayout
2424 * @iter: a #GtkTextIter
2426 * Move the iterator to the beginning of the previous line. The lines
2427 * of a wrapped paragraph are treated as distinct for this operation.
2430 gtk_text_layout_move_iter_to_previous_line (GtkTextLayout *layout,
2434 GtkTextLineDisplay *display;
2437 PangoLayoutLine *layout_line;
2439 gboolean update_byte = FALSE;
2441 g_return_val_if_fail (layout != NULL, FALSE);
2442 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
2443 g_return_val_if_fail (iter != NULL, FALSE);
2448 line = _gtk_text_iter_get_text_line (iter);
2449 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2450 line_byte = line_display_iter_to_index (layout, display, iter);
2452 /* If display->height == 0 then the line is invisible, so don't
2455 while (display->height == 0)
2457 GtkTextLine *prev_line;
2459 prev_line = _gtk_text_line_previous (line);
2461 if (prev_line == NULL)
2463 line_display_index_to_iter (layout, display, iter, 0, 0);
2467 gtk_text_layout_free_line_display (layout, display);
2470 display = gtk_text_layout_get_line_display (layout, prev_line, FALSE);
2474 tmp_list = pango_layout_get_lines (display->layout);
2475 layout_line = tmp_list->data;
2479 line_byte = layout_line->start_index + layout_line->length;
2482 if (line_byte < layout_line->length || !tmp_list->next) /* first line of paragraph */
2484 GtkTextLine *prev_line;
2486 prev_line = _gtk_text_line_previous (line);
2489 gtk_text_layout_free_line_display (layout, display);
2491 display = gtk_text_layout_get_line_display (layout, prev_line, FALSE);
2493 if (display->height > 0)
2495 tmp_list = g_slist_last (pango_layout_get_lines (display->layout));
2496 layout_line = tmp_list->data;
2498 line_display_index_to_iter (layout, display, iter,
2499 layout_line->start_index + layout_line->length, 0);
2503 prev_line = _gtk_text_line_previous (prev_line);
2506 if (prev_line == NULL)
2507 line_display_index_to_iter (layout, display, iter, 0, 0);
2511 gint prev_offset = layout_line->start_index;
2513 tmp_list = tmp_list->next;
2516 layout_line = tmp_list->data;
2518 if (line_byte < layout_line->start_index + layout_line->length ||
2521 line_display_index_to_iter (layout, display, iter, prev_offset, 0);
2525 prev_offset = layout_line->start_index;
2526 tmp_list = tmp_list->next;
2532 gtk_text_layout_free_line_display (layout, display);
2535 !gtk_text_iter_equal (iter, &orig) &&
2536 !gtk_text_iter_is_end (iter);
2540 * gtk_text_layout_move_iter_to_next_line:
2541 * @layout: a #GtkLayout
2542 * @iter: a #GtkTextIter
2544 * Move the iterator to the beginning of the next line. The
2545 * lines of a wrapped paragraph are treated as distinct for
2549 gtk_text_layout_move_iter_to_next_line (GtkTextLayout *layout,
2553 GtkTextLineDisplay *display;
2556 gboolean found = FALSE;
2557 gboolean found_after = FALSE;
2558 gboolean first = TRUE;
2560 g_return_val_if_fail (layout != NULL, FALSE);
2561 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
2562 g_return_val_if_fail (iter != NULL, FALSE);
2566 line = _gtk_text_iter_get_text_line (iter);
2568 while (line && !found_after)
2572 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2574 if (display->height == 0)
2579 line_byte = line_display_iter_to_index (layout, display, iter);
2585 tmp_list = pango_layout_get_lines (display->layout);
2586 while (tmp_list && !found_after)
2588 PangoLayoutLine *layout_line = tmp_list->data;
2592 line_display_index_to_iter (layout, display, iter,
2593 layout_line->start_index, 0);
2596 else if (line_byte < layout_line->start_index + layout_line->length || !tmp_list->next)
2599 tmp_list = tmp_list->next;
2604 gtk_text_layout_free_line_display (layout, display);
2606 line = _gtk_text_line_next (line);
2610 !gtk_text_iter_equal (iter, &orig) &&
2611 !gtk_text_iter_is_end (iter);
2615 * gtk_text_layout_move_iter_to_line_end:
2616 * @layout: a #GtkTextLayout
2617 * @direction: if negative, move to beginning of line, otherwise
2618 move to end of line.
2620 * Move to the beginning or end of a display line.
2623 gtk_text_layout_move_iter_to_line_end (GtkTextLayout *layout,
2628 GtkTextLineDisplay *display;
2633 g_return_val_if_fail (layout != NULL, FALSE);
2634 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
2635 g_return_val_if_fail (iter != NULL, FALSE);
2639 line = _gtk_text_iter_get_text_line (iter);
2640 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2641 line_byte = line_display_iter_to_index (layout, display, iter);
2643 tmp_list = pango_layout_get_lines (display->layout);
2646 PangoLayoutLine *layout_line = tmp_list->data;
2648 if (line_byte < layout_line->start_index + layout_line->length || !tmp_list->next)
2650 line_display_index_to_iter (layout, display, iter,
2651 direction < 0 ? layout_line->start_index : layout_line->start_index + layout_line->length,
2654 /* FIXME: As a bad hack, we move back one position when we
2655 * are inside a paragraph to avoid going to next line on a
2656 * forced break not at whitespace. Real fix is to keep track
2657 * of whether marks are at leading or trailing edge? */
2658 if (direction > 0 && layout_line->length > 0 && !gtk_text_iter_ends_line (iter))
2659 gtk_text_iter_backward_char (iter);
2664 tmp_list = tmp_list->next;
2667 gtk_text_layout_free_line_display (layout, display);
2670 !gtk_text_iter_equal (iter, &orig) &&
2671 !gtk_text_iter_is_end (iter);
2676 * gtk_text_layout_iter_starts_line:
2677 * @layout: a #GtkTextLayout
2678 * @iter: iterator to test
2680 * Tests whether an iterator is at the start of a display line.
2683 gtk_text_layout_iter_starts_line (GtkTextLayout *layout,
2684 const GtkTextIter *iter)
2687 GtkTextLineDisplay *display;
2691 g_return_val_if_fail (layout != NULL, FALSE);
2692 g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
2693 g_return_val_if_fail (iter != NULL, FALSE);
2695 line = _gtk_text_iter_get_text_line (iter);
2696 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2697 line_byte = line_display_iter_to_index (layout, display, iter);
2699 tmp_list = pango_layout_get_lines (display->layout);
2702 PangoLayoutLine *layout_line = tmp_list->data;
2704 if (line_byte < layout_line->start_index + layout_line->length ||
2707 /* We're located on this line or the para delimiters before
2710 gtk_text_layout_free_line_display (layout, display);
2712 if (line_byte == layout_line->start_index)
2718 tmp_list = tmp_list->next;
2721 g_assert_not_reached ();
2726 gtk_text_layout_get_iter_at_line (GtkTextLayout *layout,
2731 _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
2732 iter, line, byte_offset);
2737 * gtk_text_layout_move_iter_to_x:
2738 * @layout: a #GtkTextLayout
2739 * @iter: a #GtkTextIter
2742 * Keeping the iterator on the same line of the layout, move it to the
2743 * specified X coordinate. The lines of a wrapped paragraph are
2744 * treated as distinct for this operation.
2747 gtk_text_layout_move_iter_to_x (GtkTextLayout *layout,
2752 GtkTextLineDisplay *display;
2754 PangoLayoutIter *layout_iter;
2756 g_return_if_fail (layout != NULL);
2757 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
2758 g_return_if_fail (iter != NULL);
2760 line = _gtk_text_iter_get_text_line (iter);
2762 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2763 line_byte = line_display_iter_to_index (layout, display, iter);
2765 layout_iter = pango_layout_get_iter (display->layout);
2769 PangoLayoutLine *layout_line = pango_layout_iter_get_line (layout_iter);
2771 if (line_byte < layout_line->start_index + layout_line->length ||
2772 pango_layout_iter_at_last_line (layout_iter))
2774 PangoRectangle logical_rect;
2775 gint byte_index, trailing;
2776 gint x_offset = display->x_offset * PANGO_SCALE;
2778 pango_layout_iter_get_line_extents (layout_iter, NULL, &logical_rect);
2780 pango_layout_line_x_to_index (layout_line,
2781 x * PANGO_SCALE - x_offset - logical_rect.x,
2782 &byte_index, &trailing);
2784 line_display_index_to_iter (layout, display, iter, byte_index, trailing);
2789 while (pango_layout_iter_next_line (layout_iter));
2791 pango_layout_iter_free (layout_iter);
2793 gtk_text_layout_free_line_display (layout, display);
2797 * gtk_text_layout_move_iter_visually:
2798 * @layout: a #GtkTextLayout
2799 * @iter: a #GtkTextIter
2800 * @count: number of characters to move (negative moves left, positive moves right)
2802 * Move the iterator a given number of characters visually, treating
2803 * it as the strong cursor position. If @count is positive, then the
2804 * new strong cursor position will be @count positions to the right of
2805 * the old cursor position. If @count is negative then the new strong
2806 * cursor position will be @count positions to the left of the old
2809 * In the presence of bidirection text, the correspondence
2810 * between logical and visual order will depend on the direction
2811 * of the current run, and there may be jumps when the cursor
2812 * is moved off of the end of a run.
2816 gtk_text_layout_move_iter_visually (GtkTextLayout *layout,
2820 GtkTextLineDisplay *display = NULL;
2823 g_return_val_if_fail (layout != NULL, FALSE);
2824 g_return_val_if_fail (iter != NULL, FALSE);
2830 GtkTextLine *line = _gtk_text_iter_get_text_line (iter);
2832 gint extra_back = 0;
2834 int byte_count = _gtk_text_line_byte_count (line);
2841 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2842 line_byte = line_display_iter_to_index (layout, display, iter);
2846 pango_layout_move_cursor_visually (display->layout, line_byte, 0, 1, &new_index, &new_trailing);
2851 pango_layout_move_cursor_visually (display->layout, line_byte, 0, -1, &new_index, &new_trailing);
2855 /* We need to handle the preedit string specially. Well, we don't really need to
2856 * handle it specially, since hopefully calling gtk_im_context_reset() will
2857 * remove the preedit string; but if we start off in front of the preedit
2858 * string (logically) and end up in or on the back edge of the preedit string,
2859 * we should move the iter one place farther.
2861 if (layout->preedit_len > 0 && display->insert_index >= 0)
2863 if (line_byte == display->insert_index + layout->preedit_len &&
2864 new_index < display->insert_index + layout->preedit_len)
2866 line_byte = display->insert_index;
2871 if (new_index < 0 || (new_index == 0 && extra_back))
2873 line = _gtk_text_line_previous (line);
2878 gtk_text_layout_free_line_display (layout, display);
2879 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2880 new_index = _gtk_text_line_byte_count (line);
2882 else if (new_index > byte_count)
2884 line = _gtk_text_line_next (line);
2888 gtk_text_layout_free_line_display (layout, display);
2889 display = gtk_text_layout_get_line_display (layout, line, FALSE);
2893 line_display_index_to_iter (layout, display, iter, new_index, new_trailing);
2895 gtk_text_iter_backward_char (iter);
2898 gtk_text_layout_free_line_display (layout, display);
2903 !gtk_text_iter_equal (iter, &orig) &&
2904 !gtk_text_iter_is_end (iter);
2908 gtk_text_layout_spew (GtkTextLayout *layout)
2911 GtkTextDisplayLine *iter;
2913 guint paragraphs = 0;
2914 GtkTextLine *last_line = NULL;
2916 iter = layout->line_list;
2917 while (iter != NULL)
2919 if (iter->line != last_line)
2921 printf ("%5u paragraph (%p)\n", paragraphs, iter->line);
2923 last_line = iter->line;
2926 printf (" %5u y: %d len: %d start: %d bytes: %d\n",
2927 wrapped, iter->y, iter->length, iter->byte_offset,
2934 printf ("Layout %s recompute\n",
2935 layout->need_recompute ? "needs" : "doesn't need");
2937 printf ("Layout pars: %u lines: %u size: %d x %d Screen width: %d\n",
2938 paragraphs, wrapped, layout->width,
2939 layout->height, layout->screen_width);