1 /* ATK - The Accessibility Toolkit for GTK+
2 * Copyright 2001 Sun Microsystems Inc.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
23 #include "atkmarshal.h"
29 * @Short_description: The ATK interface implemented by components
33 * #AtkText should be implemented by #AtkObjects on behalf of widgets
34 * that have text content which is either attributed or otherwise
35 * non-trivial. #AtkObjects whose text content is simple,
36 * unattributed, and very brief may expose that content via
37 * #atk_object_get_name instead; however if the text is editable,
38 * multi-line, typically longer than three or four words, attributed,
39 * selectable, or if the object already uses the 'name' ATK property
40 * for other information, the #AtkText interface should be used to
41 * expose the text content. In the case of editable text content,
42 * #AtkEditableText (a subtype of the #AtkText interface) should be
43 * implemented instead.
45 * #AtkText provides not only traversal facilities and change
46 * notification for text content, but also caret tracking and glyph
47 * bounding box calculations. Note that the text strings are exposed
48 * as UTF-8, and are therefore potentially multi-byte, and
49 * caret-to-byte offset mapping makes no assumptions about the
50 * character length; also bounding box glyph-to-offset mapping may be
51 * complex for languages which use ligatures.
54 static GPtrArray *extra_attributes = NULL;
59 TEXT_SELECTION_CHANGED,
60 TEXT_ATTRIBUTES_CHANGED,
66 static const char boolean[] =
69 static const guint8 boolean_offsets[] = {
73 static const char style[] =
77 static const guint8 style_offsets[] = {
81 static const char variant[] =
84 static const guint8 variant_offsets[] = {
88 static const char stretch[] =
98 static const guint8 stretch_offsets[] = {
99 0, 16, 32, 42, 57, 64, 78, 87, 102
102 static const char justification[] =
107 static const guint8 justification_offsets[] = {
111 static const char direction[] =
115 static const guint8 direction_offsets[] = {
119 static const char wrap_mode[] =
124 static const guint8 wrap_mode_offsets[] = {
128 static const char underline[] =
134 static const guint8 underline_offsets[] = {
138 static void atk_text_base_init (AtkTextIface *class);
140 static void atk_text_real_get_range_extents (AtkText *text,
143 AtkCoordType coord_type,
144 AtkTextRectangle *rect);
146 static AtkTextRange** atk_text_real_get_bounded_ranges (AtkText *text,
147 AtkTextRectangle *rect,
148 AtkCoordType coord_type,
149 AtkTextClipType x_clip_type,
150 AtkTextClipType y_clip_type);
152 static guint atk_text_signals[LAST_SIGNAL] = { 0 };
155 atk_text_get_type (void)
157 static GType type = 0;
161 static const GTypeInfo tinfo =
163 sizeof (AtkTextIface),
164 (GBaseInitFunc) atk_text_base_init,
165 (GBaseFinalizeFunc) NULL,
166 (GClassInitFunc) NULL /* atk_text_interface_init */ ,
167 (GClassFinalizeFunc) NULL,
171 type = g_type_register_static (G_TYPE_INTERFACE, "AtkText", &tinfo, 0);
178 atk_text_base_init (AtkTextIface *class)
180 static gboolean initialized = FALSE;
185 * Note that text_changed signal supports details "insert", "delete",
186 * possibly "replace".
189 class->get_range_extents = atk_text_real_get_range_extents;
190 class->get_bounded_ranges = atk_text_real_get_bounded_ranges;
193 * AtkText::text-changed:
194 * @atktext: the object which received the signal.
195 * @arg1: The position (character offset) of the insertion or deletion.
196 * @arg2: The length (in characters) of text inserted or deleted.
198 * The "text-changed" signal is emitted when the text of the
199 * object which implements the AtkText interface changes, This
200 * signal will have a detail which is either "insert" or
201 * "delete" which identifies whether the text change was an
202 * insertion or a deletion.
204 * Deprecated: 2.9.4: Use #AtkObject::text-insert or
205 * #AtkObject::text-remove instead.
207 atk_text_signals[TEXT_CHANGED] =
208 g_signal_new ("text_changed",
210 G_SIGNAL_RUN_LAST | G_SIGNAL_DETAILED,
211 G_STRUCT_OFFSET (AtkTextIface, text_changed),
212 (GSignalAccumulator) NULL, NULL,
213 atk_marshal_VOID__INT_INT,
215 2, G_TYPE_INT, G_TYPE_INT);
218 * AtkText::text-insert:
219 * @atktext: the object which received the signal.
220 * @arg1: The position (character offset) of the insertion.
221 * @arg2: The length (in characters) of text inserted.
222 * @arg3: The new text inserted
224 * The "text-insert" signal is emitted when a new text is
225 * inserted. If the signal was not triggered by the user
226 * (e.g. typing or pasting text), the "system" detail should be
229 atk_text_signals[TEXT_INSERT] =
230 g_signal_new ("text_insert",
232 G_SIGNAL_RUN_LAST | G_SIGNAL_DETAILED,
234 (GSignalAccumulator) NULL, NULL,
235 atk_marshal_VOID__INT_INT_STRING,
237 3, G_TYPE_INT, G_TYPE_INT, G_TYPE_STRING);
240 * AtkText::text-remove:
241 * @atktext: the object which received the signal.
242 * @arg1: The position (character offset) of the removal.
243 * @arg2: The length (in characters) of text removed.
244 * @arg3: The old text removed
246 * The "text-remove" signal is emitted when a new text is
247 * removed. If the signal was not triggered by the user
248 * (e.g. typing or pasting text), the "system" detail should be
251 atk_text_signals[TEXT_REMOVE] =
252 g_signal_new ("text_remove",
254 G_SIGNAL_RUN_LAST | G_SIGNAL_DETAILED,
256 (GSignalAccumulator) NULL, NULL,
257 atk_marshal_VOID__INT_INT_STRING,
259 3, G_TYPE_INT, G_TYPE_INT, G_TYPE_STRING);
262 * AtkText::text-caret-moved:
263 * @atktext: the object which received the signal.
264 * @arg1: The new position of the text caret.
266 * The "text-caret-moved" signal is emitted when the caret
267 * position of the text of an object which implements AtkText
270 atk_text_signals[TEXT_CARET_MOVED] =
271 g_signal_new ("text_caret_moved",
274 G_STRUCT_OFFSET (AtkTextIface, text_caret_moved),
275 (GSignalAccumulator) NULL, NULL,
276 g_cclosure_marshal_VOID__INT,
281 * AtkText::text-selection-changed:
282 * @atktext: the object which received the signal.
284 * The "text-selection-changed" signal is emitted when the
285 * selected text of an object which implements AtkText changes.
287 atk_text_signals[TEXT_SELECTION_CHANGED] =
288 g_signal_new ("text_selection_changed",
291 G_STRUCT_OFFSET (AtkTextIface, text_selection_changed),
292 (GSignalAccumulator) NULL, NULL,
293 g_cclosure_marshal_VOID__VOID,
296 * AtkText::text-attributes-changed:
297 * @atktext: the object which received the signal.
299 * The "text-attributes-changed" signal is emitted when the text
300 * attributes of the text of an object which implements AtkText
303 atk_text_signals[TEXT_ATTRIBUTES_CHANGED] =
304 g_signal_new ("text_attributes_changed",
307 G_STRUCT_OFFSET (AtkTextIface, text_attributes_changed),
308 (GSignalAccumulator) NULL, NULL,
309 g_cclosure_marshal_VOID__VOID,
320 * @start_offset: a starting character offset within @text
321 * @end_offset: an ending character offset within @text, or -1 for the end of the string.
323 * Gets the specified text.
325 * Returns: a newly allocated string containing the text from @start_offset up
326 * to, but not including @end_offset. Use g_free() to free the returned
330 atk_text_get_text (AtkText *text,
336 g_return_val_if_fail (ATK_IS_TEXT (text), NULL);
338 iface = ATK_TEXT_GET_IFACE (text);
340 if (start_offset < 0 || end_offset < -1 ||
341 (end_offset != -1 && end_offset < start_offset))
345 return (*(iface->get_text)) (text, start_offset, end_offset);
351 * atk_text_get_character_at_offset:
353 * @offset: a character offset within @text
355 * Gets the specified text.
357 * Returns: the character at @offset or 0 in the case of failure.
360 atk_text_get_character_at_offset (AtkText *text,
365 g_return_val_if_fail (ATK_IS_TEXT (text), (gunichar) 0);
367 iface = ATK_TEXT_GET_IFACE (text);
369 if (iface->get_character_at_offset)
370 return (*(iface->get_character_at_offset)) (text, offset);
376 * atk_text_get_text_after_offset:
379 * @boundary_type: An #AtkTextBoundary
380 * @start_offset: (out): the starting character offset of the returned string
381 * @end_offset: (out): the offset of the first character after the
384 * Gets the specified text.
386 * Deprecated: 2.9.3: Please use atk_text_get_string_at_offset() instead.
388 * Returns: a newly allocated string containing the text after @offset bounded
389 * by the specified @boundary_type. Use g_free() to free the returned
393 atk_text_get_text_after_offset (AtkText *text,
395 AtkTextBoundary boundary_type,
400 gint local_start_offset, local_end_offset;
401 gint *real_start_offset, *real_end_offset;
403 g_return_val_if_fail (ATK_IS_TEXT (text), NULL);
406 real_start_offset = start_offset;
408 real_start_offset = &local_start_offset;
410 real_end_offset = end_offset;
412 real_end_offset = &local_end_offset;
417 iface = ATK_TEXT_GET_IFACE (text);
419 if (iface->get_text_after_offset)
420 return (*(iface->get_text_after_offset)) (text, offset, boundary_type, real_start_offset, real_end_offset);
426 * atk_text_get_text_at_offset:
429 * @boundary_type: An #AtkTextBoundary
430 * @start_offset: (out): the starting character offset of the returned string
431 * @end_offset: (out): the offset of the first character after the
434 * Gets the specified text.
436 * If the boundary_type if ATK_TEXT_BOUNDARY_CHAR the character at the
437 * offset is returned.
439 * If the boundary_type is ATK_TEXT_BOUNDARY_WORD_START the returned string
440 * is from the word start at or before the offset to the word start after
443 * The returned string will contain the word at the offset if the offset
444 * is inside a word and will contain the word before the offset if the
445 * offset is not inside a word.
447 * If the boundary type is ATK_TEXT_BOUNDARY_SENTENCE_START the returned
448 * string is from the sentence start at or before the offset to the sentence
449 * start after the offset.
451 * The returned string will contain the sentence at the offset if the offset
452 * is inside a sentence and will contain the sentence before the offset
453 * if the offset is not inside a sentence.
455 * If the boundary type is ATK_TEXT_BOUNDARY_LINE_START the returned
456 * string is from the line start at or before the offset to the line
457 * start after the offset.
459 * Deprecated: This method is deprecated since ATK version
460 * 2.9.4. Please use atk_text_get_string_at_offset() instead.
462 * Returns: a newly allocated string containing the text at @offset bounded
463 * by the specified @boundary_type. Use g_free() to free the returned
467 atk_text_get_text_at_offset (AtkText *text,
469 AtkTextBoundary boundary_type,
474 gint local_start_offset, local_end_offset;
475 gint *real_start_offset, *real_end_offset;
477 g_return_val_if_fail (ATK_IS_TEXT (text), NULL);
480 real_start_offset = start_offset;
482 real_start_offset = &local_start_offset;
484 real_end_offset = end_offset;
486 real_end_offset = &local_end_offset;
488 iface = ATK_TEXT_GET_IFACE (text);
490 if (iface->get_text_at_offset)
491 return (*(iface->get_text_at_offset)) (text, offset, boundary_type, real_start_offset, real_end_offset);
497 * atk_text_get_text_before_offset:
500 * @boundary_type: An #AtkTextBoundary
501 * @start_offset: (out): the starting character offset of the returned string
502 * @end_offset: (out): the offset of the first character after the
505 * Gets the specified text.
507 * Deprecated: 2.9.3: Please use atk_text_get_string_at_offset() instead.
509 * Returns: a newly allocated string containing the text before @offset bounded
510 * by the specified @boundary_type. Use g_free() to free the returned
514 atk_text_get_text_before_offset (AtkText *text,
516 AtkTextBoundary boundary_type,
521 gint local_start_offset, local_end_offset;
522 gint *real_start_offset, *real_end_offset;
524 g_return_val_if_fail (ATK_IS_TEXT (text), NULL);
527 real_start_offset = start_offset;
529 real_start_offset = &local_start_offset;
531 real_end_offset = end_offset;
533 real_end_offset = &local_end_offset;
538 iface = ATK_TEXT_GET_IFACE (text);
540 if (iface->get_text_before_offset)
541 return (*(iface->get_text_before_offset)) (text, offset, boundary_type, real_start_offset, real_end_offset);
547 * atk_text_get_string_at_offset:
550 * @granularity: An #AtkTextGranularity
551 * @start_offset: (out): the starting character offset of the returned string, or -1
552 * in the case of error (e.g. invalid offset, not implemented)
553 * @end_offset: (out): the offset of the first character after the returned string,
554 * or -1 in the case of error (e.g. invalid offset, not implemented)
556 * Gets a portion of the text exposed through an #AtkText according to a given @offset
557 * and a specific @granularity, along with the start and end offsets defining the
558 * boundaries of such a portion of text.
560 * If @granularity is ATK_TEXT_GRANULARITY_CHAR the character at the
561 * offset is returned.
563 * If @granularity is ATK_TEXT_GRANULARITY_WORD the returned string
564 * is from the word start at or before the offset to the word start after
567 * The returned string will contain the word at the offset if the offset
568 * is inside a word and will contain the word before the offset if the
569 * offset is not inside a word.
571 * If @granularity is ATK_TEXT_GRANULARITY_SENTENCE the returned string
572 * is from the sentence start at or before the offset to the sentence
573 * start after the offset.
575 * The returned string will contain the sentence at the offset if the offset
576 * is inside a sentence and will contain the sentence before the offset
577 * if the offset is not inside a sentence.
579 * If @granularity is ATK_TEXT_GRANULARITY_LINE the returned string
580 * is from the line start at or before the offset to the line
581 * start after the offset.
583 * If @granularity is ATK_TEXT_GRANULARITY_PARAGRAPH the returned string
584 * is from the start of the paragraph at or before the offset to the start
585 * of the following paragraph after the offset.
589 * Returns: (nullable): a newly allocated string containing the text at
590 * the @offset bounded by the specified @granularity. Use g_free()
591 * to free the returned string. Returns %NULL if the offset is invalid
592 * or no implementation is available.
594 gchar* atk_text_get_string_at_offset (AtkText *text,
596 AtkTextGranularity granularity,
601 gint local_start_offset, local_end_offset;
602 gint *real_start_offset, *real_end_offset;
604 g_return_val_if_fail (ATK_IS_TEXT (text), NULL);
609 real_start_offset = start_offset;
612 real_start_offset = &local_start_offset;
617 real_end_offset = end_offset;
620 real_end_offset = &local_end_offset;
625 iface = ATK_TEXT_GET_IFACE (text);
627 if (iface->get_string_at_offset)
628 return (*(iface->get_string_at_offset)) (text, offset, granularity, real_start_offset, real_end_offset);
634 * atk_text_get_caret_offset:
637 * Gets the offset of the position of the caret (cursor).
639 * Returns: the character offset of the position of the caret or 0 if
640 * the caret is not located inside the element or in the case of
644 atk_text_get_caret_offset (AtkText *text)
648 g_return_val_if_fail (ATK_IS_TEXT (text), 0);
650 iface = ATK_TEXT_GET_IFACE (text);
652 if (iface->get_caret_offset)
653 return (*(iface->get_caret_offset)) (text);
659 * atk_text_get_character_extents:
661 * @offset: The offset of the text character for which bounding information is required.
662 * @x: (out) (optional): Pointer for the x coordinate of the bounding box
663 * @y: (out) (optional): Pointer for the y coordinate of the bounding box
664 * @width: (out) (optional): Pointer for the width of the bounding box
665 * @height: (out) (optional): Pointer for the height of the bounding box
666 * @coords: specify whether coordinates are relative to the screen or widget window
668 * Get the bounding box containing the glyph representing the character at
669 * a particular text offset.
672 atk_text_get_character_extents (AtkText *text,
681 gint local_x, local_y, local_width, local_height;
682 gint *real_x, *real_y, *real_width, *real_height;
684 g_return_if_fail (ATK_IS_TEXT (text));
697 real_width = &local_width;
699 real_height = height;
701 real_height = &local_height;
711 iface = ATK_TEXT_GET_IFACE (text);
713 if (iface->get_character_extents)
714 (*(iface->get_character_extents)) (text, offset, real_x, real_y, real_width, real_height, coords);
718 *real_x = *real_x + *real_width;
724 * atk_text_get_run_attributes:
726 *@offset: the character offset at which to get the attributes, -1 means the offset of
727 *the character to be inserted at the caret location.
728 *@start_offset: (out): the address to put the start offset of the range
729 *@end_offset: (out): the address to put the end offset of the range
731 *Creates an #AtkAttributeSet which consists of the attributes explicitly
732 *set at the position @offset in the text. @start_offset and @end_offset are
733 *set to the start and end of the range around @offset where the attributes are
734 *invariant. Note that @end_offset is the offset of the first character
735 *after the range. See the enum AtkTextAttribute for types of text
736 *attributes that can be returned. Note that other attributes may also be
739 *Returns: (transfer full): an #AtkAttributeSet which contains the attributes
740 * explicitly set at @offset. This #AtkAttributeSet should be freed by
741 * a call to atk_attribute_set_free().
744 atk_text_get_run_attributes (AtkText *text,
750 gint local_start_offset, local_end_offset;
751 gint *real_start_offset, *real_end_offset;
753 g_return_val_if_fail (ATK_IS_TEXT (text), NULL);
756 real_start_offset = start_offset;
758 real_start_offset = &local_start_offset;
760 real_end_offset = end_offset;
762 real_end_offset = &local_end_offset;
767 iface = ATK_TEXT_GET_IFACE (text);
769 if (iface->get_run_attributes)
770 return (*(iface->get_run_attributes)) (text, offset, real_start_offset, real_end_offset);
776 * atk_text_get_default_attributes:
779 *Creates an #AtkAttributeSet which consists of the default values of
780 *attributes for the text. See the enum AtkTextAttribute for types of text
781 *attributes that can be returned. Note that other attributes may also be
784 *Returns: (transfer full): an #AtkAttributeSet which contains the default values
785 * of attributes. at @offset. this #atkattributeset should be freed by
786 * a call to atk_attribute_set_free().
789 atk_text_get_default_attributes (AtkText *text)
793 g_return_val_if_fail (ATK_IS_TEXT (text), NULL);
795 iface = ATK_TEXT_GET_IFACE (text);
797 if (iface->get_default_attributes)
798 return (*(iface->get_default_attributes)) (text);
804 * atk_text_get_character_count:
807 * Gets the character count.
809 * Returns: the number of characters or -1 in case of failure.
812 atk_text_get_character_count (AtkText *text)
816 g_return_val_if_fail (ATK_IS_TEXT (text), -1);
818 iface = ATK_TEXT_GET_IFACE (text);
820 if (iface->get_character_count)
821 return (*(iface->get_character_count)) (text);
827 * atk_text_get_offset_at_point:
829 * @x: screen x-position of character
830 * @y: screen y-position of character
831 * @coords: specify whether coordinates are relative to the screen or
834 * Gets the offset of the character located at coordinates @x and @y. @x and @y
835 * are interpreted as being relative to the screen or this widget's window
836 * depending on @coords.
838 * Returns: the offset to the character which is located at the specified
839 * @x and @y coordinates of -1 in case of failure.
842 atk_text_get_offset_at_point (AtkText *text,
849 g_return_val_if_fail (ATK_IS_TEXT (text), -1);
851 iface = ATK_TEXT_GET_IFACE (text);
853 if (iface->get_offset_at_point)
854 return (*(iface->get_offset_at_point)) (text, x, y, coords);
860 * atk_text_get_n_selections:
863 * Gets the number of selected regions.
865 * Returns: The number of selected regions, or -1 in the case of failure.
868 atk_text_get_n_selections (AtkText *text)
872 g_return_val_if_fail (ATK_IS_TEXT (text), -1);
874 iface = ATK_TEXT_GET_IFACE (text);
876 if (iface->get_n_selections)
877 return (*(iface->get_n_selections)) (text);
883 * atk_text_get_selection:
885 * @selection_num: The selection number. The selected regions are
886 * assigned numbers that correspond to how far the region is from the
887 * start of the text. The selected region closest to the beginning
888 * of the text region is assigned the number 0, etc. Note that adding,
889 * moving or deleting a selected region can change the numbering.
890 * @start_offset: (out): passes back the starting character offset of the selected region
891 * @end_offset: (out): passes back the ending character offset (offset immediately past)
892 * of the selected region
894 * Gets the text from the specified selection.
896 * Returns: a newly allocated string containing the selected text. Use g_free()
897 * to free the returned string.
900 atk_text_get_selection (AtkText *text,
906 gint local_start_offset, local_end_offset;
907 gint *real_start_offset, *real_end_offset;
909 g_return_val_if_fail (ATK_IS_TEXT (text), NULL);
912 real_start_offset = start_offset;
914 real_start_offset = &local_start_offset;
916 real_end_offset = end_offset;
918 real_end_offset = &local_end_offset;
920 iface = ATK_TEXT_GET_IFACE (text);
922 if (iface->get_selection)
924 return (*(iface->get_selection)) (text, selection_num,
925 real_start_offset, real_end_offset);
932 * atk_text_add_selection:
934 * @start_offset: the starting character offset of the selected region
935 * @end_offset: the offset of the first character after the selected region.
937 * Adds a selection bounded by the specified offsets.
939 * Returns: %TRUE if successful, %FALSE otherwise
942 atk_text_add_selection (AtkText *text,
948 g_return_val_if_fail (ATK_IS_TEXT (text), FALSE);
950 iface = ATK_TEXT_GET_IFACE (text);
952 if (iface->add_selection)
953 return (*(iface->add_selection)) (text, start_offset, end_offset);
959 * atk_text_remove_selection:
961 * @selection_num: The selection number. The selected regions are
962 * assigned numbers that correspond to how far the region is from the
963 * start of the text. The selected region closest to the beginning
964 * of the text region is assigned the number 0, etc. Note that adding,
965 * moving or deleting a selected region can change the numbering.
967 * Removes the specified selection.
969 * Returns: %TRUE if successful, %FALSE otherwise
972 atk_text_remove_selection (AtkText *text,
977 g_return_val_if_fail (ATK_IS_TEXT (text), FALSE);
979 iface = ATK_TEXT_GET_IFACE (text);
981 if (iface->remove_selection)
982 return (*(iface->remove_selection)) (text, selection_num);
988 * atk_text_set_selection:
990 * @selection_num: The selection number. The selected regions are
991 * assigned numbers that correspond to how far the region is from the
992 * start of the text. The selected region closest to the beginning
993 * of the text region is assigned the number 0, etc. Note that adding,
994 * moving or deleting a selected region can change the numbering.
995 * @start_offset: the new starting character offset of the selection
996 * @end_offset: the new end position of (e.g. offset immediately past)
999 * Changes the start and end offset of the specified selection.
1001 * Returns: %TRUE if successful, %FALSE otherwise
1004 atk_text_set_selection (AtkText *text,
1009 AtkTextIface *iface;
1011 g_return_val_if_fail (ATK_IS_TEXT (text), FALSE);
1013 iface = ATK_TEXT_GET_IFACE (text);
1015 if (iface->set_selection)
1017 return (*(iface->set_selection)) (text, selection_num,
1018 start_offset, end_offset);
1025 * atk_text_set_caret_offset:
1026 * @text: an #AtkText
1027 * @offset: the character offset of the new caret position
1029 * Sets the caret (cursor) position to the specified @offset.
1031 * Returns: %TRUE if successful, %FALSE otherwise.
1034 atk_text_set_caret_offset (AtkText *text,
1037 AtkTextIface *iface;
1039 g_return_val_if_fail (ATK_IS_TEXT (text), FALSE);
1041 iface = ATK_TEXT_GET_IFACE (text);
1043 if (iface->set_caret_offset)
1045 return (*(iface->set_caret_offset)) (text, offset);
1054 * atk_text_get_range_extents:
1055 * @text: an #AtkText
1056 * @start_offset: The offset of the first text character for which boundary
1057 * information is required.
1058 * @end_offset: The offset of the text character after the last character
1059 * for which boundary information is required.
1060 * @coord_type: Specify whether coordinates are relative to the screen or widget window.
1061 * @rect: (out): A pointer to a AtkTextRectangle which is filled in by this function.
1063 * Get the bounding box for text within the specified range.
1068 atk_text_get_range_extents (AtkText *text,
1071 AtkCoordType coord_type,
1072 AtkTextRectangle *rect)
1074 AtkTextIface *iface;
1076 g_return_if_fail (ATK_IS_TEXT (text));
1077 g_return_if_fail (rect);
1078 g_return_if_fail (start_offset >= 0 && start_offset < end_offset);
1080 iface = ATK_TEXT_GET_IFACE (text);
1082 if (iface->get_range_extents)
1083 (*(iface->get_range_extents)) (text, start_offset, end_offset, coord_type, rect);
1087 * atk_text_get_bounded_ranges: (virtual get_bounded_ranges)
1088 * @text: an #AtkText
1089 * @rect: An AtkTextRectangle giving the dimensions of the bounding box.
1090 * @coord_type: Specify whether coordinates are relative to the screen or widget window.
1091 * @x_clip_type: Specify the horizontal clip type.
1092 * @y_clip_type: Specify the vertical clip type.
1094 * Get the ranges of text in the specified bounding box.
1098 * Returns: (array zero-terminated=1): Array of AtkTextRange. The last
1099 * element of the array returned by this function will be NULL.
1102 atk_text_get_bounded_ranges (AtkText *text,
1103 AtkTextRectangle *rect,
1104 AtkCoordType coord_type,
1105 AtkTextClipType x_clip_type,
1106 AtkTextClipType y_clip_type)
1108 AtkTextIface *iface;
1110 g_return_val_if_fail (ATK_IS_TEXT (text), NULL);
1111 g_return_val_if_fail (rect, NULL);
1113 iface = ATK_TEXT_GET_IFACE (text);
1115 if (iface->get_bounded_ranges)
1116 return (*(iface->get_bounded_ranges)) (text, rect, coord_type, x_clip_type, y_clip_type);
1122 * atk_attribute_set_free:
1123 * @attrib_set: The #AtkAttributeSet to free
1125 * Frees the memory used by an #AtkAttributeSet, including all its
1129 atk_attribute_set_free (AtkAttributeSet *attrib_set)
1135 while (temp != NULL)
1142 g_free (att->value);
1146 g_slist_free (attrib_set);
1150 * atk_text_attribute_register:
1151 * @name: a name string
1153 * Associate @name with a new #AtkTextAttribute
1155 * Returns: an #AtkTextAttribute associated with @name
1158 atk_text_attribute_register (const gchar *name)
1160 g_return_val_if_fail (name, ATK_TEXT_ATTR_INVALID);
1162 if (!extra_attributes)
1163 extra_attributes = g_ptr_array_new ();
1165 g_ptr_array_add (extra_attributes, g_strdup (name));
1166 return extra_attributes->len + ATK_TEXT_ATTR_LAST_DEFINED;
1170 * atk_text_attribute_get_name:
1171 * @attr: The #AtkTextAttribute whose name is required
1173 * Gets the name corresponding to the #AtkTextAttribute
1175 * Returns: a string containing the name; this string should not be freed
1178 atk_text_attribute_get_name (AtkTextAttribute attr)
1180 GTypeClass *type_class;
1182 const gchar *name = NULL;
1184 type_class = g_type_class_ref (ATK_TYPE_TEXT_ATTRIBUTE);
1185 g_return_val_if_fail (G_IS_ENUM_CLASS (type_class), NULL);
1187 value = g_enum_get_value (G_ENUM_CLASS (type_class), attr);
1191 name = value->value_nick;
1195 if (extra_attributes)
1199 n -= ATK_TEXT_ATTR_LAST_DEFINED + 1;
1201 if (n < extra_attributes->len)
1203 name = g_ptr_array_index (extra_attributes, n);
1206 g_type_class_unref (type_class);
1211 * atk_text_attribute_for_name:
1212 * @name: a string which is the (non-localized) name of an ATK text attribute.
1214 * Get the #AtkTextAttribute type corresponding to a text attribute name.
1216 * Returns: the #AtkTextAttribute enumerated type corresponding to the specified
1217 * name, or #ATK_TEXT_ATTRIBUTE_INVALID if no matching text attribute
1221 atk_text_attribute_for_name (const gchar *name)
1223 GTypeClass *type_class;
1225 AtkTextAttribute type = ATK_TEXT_ATTR_INVALID;
1227 g_return_val_if_fail (name, ATK_TEXT_ATTR_INVALID);
1229 type_class = g_type_class_ref (ATK_TYPE_TEXT_ATTRIBUTE);
1230 g_return_val_if_fail (G_IS_ENUM_CLASS (type_class), ATK_TEXT_ATTR_INVALID);
1232 value = g_enum_get_value_by_nick (G_ENUM_CLASS (type_class), name);
1236 type = value->value;
1242 if (extra_attributes)
1244 for (i = 0; i < extra_attributes->len; i++)
1246 gchar *extra_attribute = (gchar *)g_ptr_array_index (extra_attributes, i);
1248 g_return_val_if_fail (extra_attribute, ATK_TEXT_ATTR_INVALID);
1250 if (strcmp (name, extra_attribute) == 0)
1252 type = i + 1 + ATK_TEXT_ATTR_LAST_DEFINED;
1258 g_type_class_unref (type_class);
1264 * atk_text_attribute_get_value:
1265 * @attr: The #AtkTextAttribute for which a value is required
1266 * @index_: The index of the required value
1268 * Gets the value for the index of the #AtkTextAttribute
1270 * Returns: (nullable): a string containing the value; this string
1271 * should not be freed; %NULL is returned if there are no values
1272 * maintained for the attr value.
1275 atk_text_attribute_get_value (AtkTextAttribute attr,
1280 case ATK_TEXT_ATTR_INVISIBLE:
1281 case ATK_TEXT_ATTR_EDITABLE:
1282 case ATK_TEXT_ATTR_BG_FULL_HEIGHT:
1283 case ATK_TEXT_ATTR_STRIKETHROUGH:
1284 case ATK_TEXT_ATTR_BG_STIPPLE:
1285 case ATK_TEXT_ATTR_FG_STIPPLE:
1286 g_assert (index >= 0 && index < G_N_ELEMENTS (boolean_offsets));
1287 return boolean + boolean_offsets[index];
1288 case ATK_TEXT_ATTR_UNDERLINE:
1289 g_assert (index >= 0 && index < G_N_ELEMENTS (underline_offsets));
1290 return underline + underline_offsets[index];
1291 case ATK_TEXT_ATTR_WRAP_MODE:
1292 g_assert (index >= 0 && index < G_N_ELEMENTS (wrap_mode_offsets));
1293 return wrap_mode + wrap_mode_offsets[index];
1294 case ATK_TEXT_ATTR_DIRECTION:
1295 g_assert (index >= 0 && index < G_N_ELEMENTS (direction_offsets));
1296 return direction + direction_offsets[index];
1297 case ATK_TEXT_ATTR_JUSTIFICATION:
1298 g_assert (index >= 0 && index < G_N_ELEMENTS (justification_offsets));
1299 return justification + justification_offsets[index];
1300 case ATK_TEXT_ATTR_STRETCH:
1301 g_assert (index >= 0 && index < G_N_ELEMENTS (stretch_offsets));
1302 return stretch + stretch_offsets[index];
1303 case ATK_TEXT_ATTR_VARIANT:
1304 g_assert (index >= 0 && index < G_N_ELEMENTS (variant_offsets));
1305 return variant + variant_offsets[index];
1306 case ATK_TEXT_ATTR_STYLE:
1307 g_assert (index >= 0 && index < G_N_ELEMENTS (style_offsets));
1308 return style + style_offsets[index];
1315 atk_text_rectangle_union (AtkTextRectangle *src1,
1316 AtkTextRectangle *src2,
1317 AtkTextRectangle *dest)
1319 gint dest_x, dest_y;
1321 dest_x = MIN (src1->x, src2->x);
1322 dest_y = MIN (src1->y, src2->y);
1323 dest->width = MAX (src1->x + src1->width, src2->x + src2->width) - dest_x;
1324 dest->height = MAX (src1->y + src1->height, src2->y + src2->height) - dest_y;
1330 atk_text_rectangle_contain (AtkTextRectangle *clip,
1331 AtkTextRectangle *bounds,
1332 AtkTextClipType x_clip_type,
1333 AtkTextClipType y_clip_type)
1335 gboolean x_min_ok, x_max_ok, y_min_ok, y_max_ok;
1337 x_min_ok = (bounds->x >= clip->x) ||
1338 ((bounds->x + bounds->width >= clip->x) &&
1339 ((x_clip_type == ATK_TEXT_CLIP_NONE) ||
1340 (x_clip_type == ATK_TEXT_CLIP_MAX)));
1342 x_max_ok = (bounds->x + bounds->width <= clip->x + clip->width) ||
1343 ((bounds->x <= clip->x + clip->width) &&
1344 ((x_clip_type == ATK_TEXT_CLIP_NONE) ||
1345 (x_clip_type == ATK_TEXT_CLIP_MIN)));
1347 y_min_ok = (bounds->y >= clip->y) ||
1348 ((bounds->y + bounds->height >= clip->y) &&
1349 ((y_clip_type == ATK_TEXT_CLIP_NONE) ||
1350 (y_clip_type == ATK_TEXT_CLIP_MAX)));
1352 y_max_ok = (bounds->y + bounds->height <= clip->y + clip->height) ||
1353 ((bounds->y <= clip->y + clip->height) &&
1354 ((y_clip_type == ATK_TEXT_CLIP_NONE) ||
1355 (y_clip_type == ATK_TEXT_CLIP_MIN)));
1357 return (x_min_ok && x_max_ok && y_min_ok && y_max_ok);
1362 atk_text_real_get_range_extents (AtkText *text,
1365 AtkCoordType coord_type,
1366 AtkTextRectangle *rect)
1369 AtkTextRectangle cbounds, bounds;
1371 atk_text_get_character_extents (text, start_offset,
1372 &bounds.x, &bounds.y,
1373 &bounds.width, &bounds.height,
1376 for (i = start_offset + 1; i < end_offset; i++)
1378 atk_text_get_character_extents (text, i,
1379 &cbounds.x, &cbounds.y,
1380 &cbounds.width, &cbounds.height,
1382 atk_text_rectangle_union (&bounds, &cbounds, &bounds);
1387 rect->width = bounds.width;
1388 rect->height = bounds.height;
1391 static AtkTextRange**
1392 atk_text_real_get_bounded_ranges (AtkText *text,
1393 AtkTextRectangle *rect,
1394 AtkCoordType coord_type,
1395 AtkTextClipType x_clip_type,
1396 AtkTextClipType y_clip_type)
1398 gint bounds_min_offset, bounds_max_offset;
1399 gint min_line_start, min_line_end;
1400 gint max_line_start, max_line_end;
1404 gint num_ranges = 0;
1405 gint range_size = 1;
1406 AtkTextRectangle cbounds;
1407 AtkTextRange **range;
1410 bounds_min_offset = atk_text_get_offset_at_point (text, rect->x, rect->y, coord_type);
1411 bounds_max_offset = atk_text_get_offset_at_point (text, rect->x + rect->width, rect->y + rect->height, coord_type);
1413 if (bounds_min_offset == 0 &&
1414 bounds_min_offset == bounds_max_offset)
1417 line = atk_text_get_text_at_offset (text, bounds_min_offset,
1418 ATK_TEXT_BOUNDARY_LINE_START,
1419 &min_line_start, &min_line_end);
1421 line = atk_text_get_text_at_offset (text, bounds_max_offset,
1422 ATK_TEXT_BOUNDARY_LINE_START,
1423 &max_line_start, &max_line_end);
1425 bounds_min_offset = MIN (min_line_start, max_line_start);
1426 bounds_max_offset = MAX (min_line_end, max_line_end);
1428 curr_offset = bounds_min_offset;
1429 while (curr_offset < bounds_max_offset)
1431 offset = curr_offset;
1433 while (curr_offset < bounds_max_offset)
1435 atk_text_get_character_extents (text, curr_offset,
1436 &cbounds.x, &cbounds.y,
1437 &cbounds.width, &cbounds.height,
1439 if (!atk_text_rectangle_contain (rect, &cbounds, x_clip_type, y_clip_type))
1443 if (curr_offset > offset)
1445 AtkTextRange *one_range = g_new (AtkTextRange, 1);
1447 one_range->start_offset = offset;
1448 one_range->end_offset = curr_offset;
1449 one_range->content = atk_text_get_text (text, offset, curr_offset);
1450 atk_text_get_range_extents (text, offset, curr_offset, coord_type, &one_range->bounds);
1452 if (num_ranges >= range_size - 1)
1455 range = g_realloc (range, range_size * sizeof (gpointer));
1457 range[num_ranges] = one_range;
1462 range[num_ranges] = NULL;
1468 * atk_text_free_ranges:
1469 * @ranges: (array): A pointer to an array of #AtkTextRange which is
1472 * Frees the memory associated with an array of AtkTextRange. It is assumed
1473 * that the array was returned by the function atk_text_get_bounded_ranges
1474 * and is NULL terminated.
1479 atk_text_free_ranges (AtkTextRange **ranges)
1481 AtkTextRange **first = ranges;
1487 AtkTextRange *range;
1491 g_free (range->content);
1498 static AtkTextRange *
1499 atk_text_range_copy (AtkTextRange *src)
1501 AtkTextRange *dst = g_new0 (AtkTextRange, 1);
1502 dst->bounds = src->bounds;
1503 dst->start_offset = src->start_offset;
1504 dst->end_offset = src->end_offset;
1506 dst->content = g_strdup (src->content);
1511 atk_text_range_free (AtkTextRange *range)
1513 g_free (range->content);
1517 G_DEFINE_BOXED_TYPE (AtkTextRange, atk_text_range, atk_text_range_copy,
1518 atk_text_range_free)