1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
2 /* this file is part of evince, a gnome document viewer
4 * Copyright (C) 2004 Red Hat, Inc
6 * Evince is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * Evince is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
23 #include <glib/gi18n-lib.h>
26 #include "gailtextutil.h"
28 #include "ev-selection.h"
29 #include "ev-page-cache.h"
30 #include "ev-view-accessible.h"
31 #include "ev-view-private.h"
32 #include "ev-mapping.h"
34 #define EV_TYPE_VIEW_ACCESSIBLE (ev_view_accessible_get_type ())
35 #define EV_VIEW_ACCESSIBLE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), EV_TYPE_VIEW_ACCESSIBLE, EvViewAccessible))
36 #define EV_IS_VIEW_ACCESSIBLE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), EV_TYPE_VIEW_ACCESSIBLE))
38 static GType ev_view_accessible_get_type (void);
46 static GtkTextBuffer *
47 ev_view_accessible_get_text_buffer (EvView *view)
49 EvPageCache *page_cache;
50 GtkTextBuffer *buffer;
51 const gchar *retval = NULL;
53 page_cache = view->page_cache;
57 retval = ev_page_cache_get_text (page_cache, view->current_page);
58 buffer = gtk_text_buffer_new (NULL);
59 gtk_text_buffer_set_text (buffer, retval, -1);
64 static const gchar *const ev_view_accessible_action_names[] =
71 static const gchar *const ev_view_accessible_action_descriptions[] =
74 N_("Scroll View Down"),
80 gchar *action_descriptions[LAST_ACTION];
81 guint action_idle_handler;
82 GtkScrollType idle_scroll;
83 } EvViewAccessiblePriv;
85 typedef GtkAccessibleClass EvViewAccessibleClass;
87 #define EV_VIEW_ACCESSIBLE_GET_PRIVATE(inst) (G_TYPE_INSTANCE_GET_PRIVATE ((inst), EV_TYPE_VIEW_ACCESSIBLE, EvViewAccessiblePriv))
90 ev_view_accessible_finalize (GObject *object)
92 EvViewAccessiblePriv *priv = EV_VIEW_ACCESSIBLE_GET_PRIVATE (object);
95 if (priv->action_idle_handler)
96 g_source_remove (priv->action_idle_handler);
97 for (i = 0; i < LAST_ACTION; i++)
98 g_free (priv->action_descriptions [i]);
101 static void ev_view_accessible_class_init (EvViewAccessibleClass *klass)
103 GObjectClass *object_class = G_OBJECT_CLASS (klass);
105 object_class->finalize = ev_view_accessible_finalize;
107 g_type_class_add_private (klass, sizeof (EvViewAccessiblePriv));
111 ev_view_accessible_get_text (AtkText *text,
116 GtkTextIter start, end;
117 GtkTextBuffer *buffer;
120 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
122 /* State is defunct */
125 buffer = ev_view_accessible_get_text_buffer (EV_VIEW (widget));
129 gtk_text_buffer_get_iter_at_offset (buffer, &start, start_pos);
130 gtk_text_buffer_get_iter_at_offset (buffer, &end, end_pos);
131 retval = gtk_text_buffer_get_text (buffer, &start, &end, FALSE);
132 g_object_unref (buffer);
138 ev_view_accessible_get_character_at_offset (AtkText *text,
142 GtkTextIter start, end;
143 GtkTextBuffer *buffer;
147 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
149 /* State is defunct */
152 buffer = ev_view_accessible_get_text_buffer (EV_VIEW (widget));
156 if (offset >= gtk_text_buffer_get_char_count (buffer))
159 gtk_text_buffer_get_iter_at_offset (buffer, &start, offset);
161 gtk_text_iter_forward_char (&end);
162 string = gtk_text_buffer_get_slice (buffer, &start, &end, FALSE);
163 unichar = g_utf8_get_char (string);
165 g_object_unref (buffer);
171 ev_view_accessible_get_text_before_offset (AtkText *text,
173 AtkTextBoundary boundary_type,
178 gpointer layout = NULL;
179 GailTextUtil *gail_text = NULL;
180 gchar *retval = NULL;
181 GtkTextBuffer *buffer;
183 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
185 /* State is defunct */
188 buffer = ev_view_accessible_get_text_buffer (EV_VIEW (widget));
192 gail_text = gail_text_util_new ();
193 gail_text_util_buffer_setup (gail_text, buffer);
194 retval = gail_text_util_get_text (gail_text, layout,
195 GAIL_BEFORE_OFFSET, boundary_type,
196 offset, start_offset, end_offset);
197 g_object_unref (gail_text);
198 g_object_unref (buffer);
204 ev_view_accessible_get_text_at_offset (AtkText *text,
206 AtkTextBoundary boundary_type,
211 gpointer layout = NULL;
212 GailTextUtil *gail_text = NULL;
213 gchar *retval = NULL;
214 GtkTextBuffer *buffer;
216 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
218 /* State is defunct */
221 buffer = ev_view_accessible_get_text_buffer (EV_VIEW (widget));
225 gail_text = gail_text_util_new ();
226 gail_text_util_buffer_setup (gail_text, buffer);
227 retval = gail_text_util_get_text (gail_text, layout,
228 GAIL_AT_OFFSET, boundary_type,
229 offset, start_offset, end_offset);
230 g_object_unref (gail_text);
231 g_object_unref (buffer);
237 ev_view_accessible_get_text_after_offset (AtkText *text,
239 AtkTextBoundary boundary_type,
244 gpointer layout = NULL;
245 GailTextUtil *gail_text = NULL;
246 gchar *retval = NULL;
247 GtkTextBuffer *buffer;
249 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
251 /* State is defunct */
254 buffer = ev_view_accessible_get_text_buffer (EV_VIEW (widget));
258 gail_text = gail_text_util_new ();
259 gail_text_util_buffer_setup (gail_text, buffer);
260 retval = gail_text_util_get_text (gail_text, layout,
261 GAIL_AFTER_OFFSET, boundary_type,
262 offset, start_offset, end_offset);
263 g_object_unref (gail_text);
264 g_object_unref (buffer);
270 ev_view_accessible_get_character_count (AtkText *text)
273 GtkTextBuffer *buffer;
276 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
278 /* State is defunct */
281 buffer = ev_view_accessible_get_text_buffer (EV_VIEW (widget));
285 retval = gtk_text_buffer_get_char_count (buffer);
286 g_object_unref (buffer);
292 ev_view_accessible_get_caret_offset (AtkText *text)
295 GtkTextBuffer *buffer;
296 GtkTextMark *cursor_mark;
297 GtkTextIter cursor_itr;
300 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
302 /* State is defunct */
305 buffer = ev_view_accessible_get_text_buffer (EV_VIEW (widget));
309 cursor_mark = gtk_text_buffer_get_insert (buffer);
310 gtk_text_buffer_get_iter_at_mark (buffer, &cursor_itr, cursor_mark);
311 retval = gtk_text_iter_get_offset (&cursor_itr);
312 g_object_unref (buffer);
318 ev_view_accessible_set_caret_offset (AtkText *text, gint offset)
321 GtkTextBuffer *buffer;
324 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
326 /* State is defunct */
329 buffer = ev_view_accessible_get_text_buffer (EV_VIEW (widget));
333 gtk_text_buffer_get_iter_at_offset (buffer, &pos_itr, offset);
334 gtk_text_buffer_place_cursor (buffer, &pos_itr);
335 g_object_unref (buffer);
340 static AtkAttributeSet*
341 ev_view_accessible_get_run_attributes (AtkText *text,
347 GtkTextBuffer *buffer;
348 AtkAttributeSet *retval;
350 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
352 /* State is defunct */
355 buffer = ev_view_accessible_get_text_buffer (EV_VIEW (widget));
359 retval = gail_misc_buffer_get_run_attributes (buffer, offset,
360 start_offset, end_offset);
361 g_object_unref (buffer);
366 static AtkAttributeSet*
367 ev_view_accessible_get_default_attributes (AtkText *text)
371 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
373 /* State is defunct */
379 ev_view_accessible_get_character_extents (AtkText *text,
387 GtkWidget *widget, *toplevel;
388 EvRectangle *areas = NULL;
389 EvRectangle *rect = NULL;
391 EvPageCache *page_cache;
392 gint x_widget, y_widget, x_window, y_window;
395 GdkRectangle page_area;
397 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
399 /* State is defunct */
402 page_cache = EV_VIEW (widget)->page_cache;
406 ev_view_get_page_extents (EV_VIEW (widget), EV_VIEW (widget)->current_page,
407 &page_area, &border);
409 scale = EV_VIEW (widget)->scale;
410 ev_page_cache_get_text_layout (page_cache, EV_VIEW (widget)->current_page, &areas, &n_areas);
414 if (offset > n_areas)
417 rect = areas + offset;
418 *x = (int)(rect->x1 * scale);
419 *y = (int)(rect->y1 * scale);
421 *width = (int)(fabs (rect->x2 - rect->x1) * scale);
422 *height = (int)(fabs (rect->y2 - rect->y1) * scale);
424 toplevel = gtk_widget_get_toplevel (widget);
425 gtk_widget_translate_coordinates (widget, toplevel, 0, 0, &x_widget, &y_widget);
429 if (coords == ATK_XY_SCREEN)
431 gdk_window_get_origin (toplevel->window, &x_window, &y_window);
436 *x -= EV_VIEW (widget)->scroll_x;
437 *y -= EV_VIEW (widget)->scroll_y;
444 ev_view_accessible_get_offset_at_point (AtkText *text,
449 GtkWidget *widget, *toplevel;
450 EvRectangle *areas = NULL;
451 EvRectangle *rect = NULL;
454 EvPageCache *page_cache;
455 gint x_window, y_window, x_widget, y_widget;
456 gint offset=-1, rx, ry;
459 GdkRectangle page_area;
461 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
463 /* State is defunct */
466 page_cache = EV_VIEW (widget)->page_cache;
470 ev_view_get_page_extents (EV_VIEW (widget), EV_VIEW (widget)->current_page,
471 &page_area, &border);
473 scale = EV_VIEW (widget)->scale;
474 ev_page_cache_get_text_layout (page_cache, EV_VIEW (widget)->current_page, &areas, &n_areas);
484 rx += EV_VIEW (widget)->scroll_x;
485 ry += EV_VIEW (widget)->scroll_y;
487 toplevel = gtk_widget_get_toplevel (widget);
488 gtk_widget_translate_coordinates (widget, toplevel, 0, 0, &x_widget, &y_widget);
492 if (coords == ATK_XY_SCREEN)
494 gdk_window_get_origin (toplevel->window, &x_window, &y_window);
502 for (i = 0; i < n_areas; i++)
505 if (rx >= rect->x1 && rx <= rect->x2 &&
506 ry >= rect->y1 && ry <= rect->y2)
514 ev_view_accessible_get_n_selections (AtkText *text)
517 GtkTextBuffer *buffer;
518 GtkTextIter start, end;
519 gint select_start, select_end;
521 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
523 /* State is defunct */
526 buffer = ev_view_accessible_get_text_buffer (EV_VIEW (widget));
530 gtk_text_buffer_get_selection_bounds (buffer, &start, &end);
531 select_start = gtk_text_iter_get_offset (&start);
532 select_end = gtk_text_iter_get_offset (&end);
534 g_object_unref (buffer);
536 if (select_start != select_end)
543 ev_view_accessible_get_selection (AtkText *text,
549 GtkTextBuffer *buffer;
550 GtkTextIter start, end;
551 gchar *retval = NULL;
553 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
555 /* State is defunct */
558 if (selection_num != 0)
561 buffer = ev_view_accessible_get_text_buffer (EV_VIEW (widget));
565 gtk_text_buffer_get_selection_bounds (buffer, &start, &end);
566 *start_pos = gtk_text_iter_get_offset (&start);
567 *end_pos = gtk_text_iter_get_offset (&end);
569 if (*start_pos != *end_pos)
570 retval = gtk_text_buffer_get_text (buffer, &start, &end, FALSE);
572 g_object_unref (buffer);
578 ev_view_accessible_add_selection (AtkText *text,
583 GtkTextBuffer *buffer;
585 GtkTextIter start, end;
586 gint select_start, select_end;
587 gboolean retval = FALSE;
589 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
591 /* State is defunct */
594 buffer = ev_view_accessible_get_text_buffer (EV_VIEW (widget));
598 gtk_text_buffer_get_selection_bounds (buffer, &start, &end);
599 select_start = gtk_text_iter_get_offset (&start);
600 select_end = gtk_text_iter_get_offset (&end);
602 /* If there is already a selection, then don't allow
603 * another to be added
605 if (select_start == select_end) {
606 gtk_text_buffer_get_iter_at_offset (buffer, &pos_itr, start_pos);
607 gtk_text_buffer_move_mark_by_name (buffer, "selection_bound", &pos_itr);
608 gtk_text_buffer_get_iter_at_offset (buffer, &pos_itr, end_pos);
609 gtk_text_buffer_move_mark_by_name (buffer, "insert", &pos_itr);
614 g_object_unref (buffer);
620 ev_view_accessible_remove_selection (AtkText *text,
624 GtkTextBuffer *buffer;
625 GtkTextMark *cursor_mark;
626 GtkTextIter cursor_itr;
627 GtkTextIter start, end;
628 gint select_start, select_end;
629 gboolean retval = FALSE;
631 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
633 /* State is defunct */
636 buffer = ev_view_accessible_get_text_buffer (EV_VIEW (widget));
640 gtk_text_buffer_get_selection_bounds(buffer, &start, &end);
641 select_start = gtk_text_iter_get_offset(&start);
642 select_end = gtk_text_iter_get_offset(&end);
644 if (select_start != select_end) {
645 /* Setting the start & end of the selected region
646 * to the caret position turns off the selection.
648 cursor_mark = gtk_text_buffer_get_insert (buffer);
649 gtk_text_buffer_get_iter_at_mark (buffer, &cursor_itr, cursor_mark);
650 gtk_text_buffer_move_mark_by_name (buffer, "selection_bound", &cursor_itr);
655 g_object_unref (buffer);
661 ev_view_accessible_set_selection (AtkText *text,
667 GtkTextBuffer *buffer;
669 GtkTextIter start, end;
670 gint select_start, select_end;
671 gboolean retval = FALSE;
673 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
675 /* State is defunct */
678 buffer = ev_view_accessible_get_text_buffer (EV_VIEW (widget));
682 gtk_text_buffer_get_selection_bounds(buffer, &start, &end);
683 select_start = gtk_text_iter_get_offset(&start);
684 select_end = gtk_text_iter_get_offset(&end);
686 if (select_start != select_end) {
687 gtk_text_buffer_get_iter_at_offset (buffer, &pos_itr, start_pos);
688 gtk_text_buffer_move_mark_by_name (buffer, "selection_bound", &pos_itr);
689 gtk_text_buffer_get_iter_at_offset (buffer, &pos_itr, end_pos);
690 gtk_text_buffer_move_mark_by_name (buffer, "insert", &pos_itr);
695 g_object_unref (buffer);
700 static void ev_view_accessible_text_iface_init (AtkTextIface * iface)
702 g_return_if_fail (iface != NULL);
704 iface->get_text = ev_view_accessible_get_text;
705 iface->get_character_at_offset = ev_view_accessible_get_character_at_offset;
706 iface->get_text_before_offset = ev_view_accessible_get_text_before_offset;
707 iface->get_text_at_offset = ev_view_accessible_get_text_at_offset;
708 iface->get_text_after_offset = ev_view_accessible_get_text_after_offset;
709 iface->get_caret_offset = ev_view_accessible_get_caret_offset;
710 iface->set_caret_offset = ev_view_accessible_set_caret_offset;
711 iface->get_character_count = ev_view_accessible_get_character_count;
712 iface->get_n_selections = ev_view_accessible_get_n_selections;
713 iface->get_selection = ev_view_accessible_get_selection;
714 iface->add_selection = ev_view_accessible_add_selection;
715 iface->remove_selection = ev_view_accessible_remove_selection;
716 iface->set_selection = ev_view_accessible_set_selection;
717 iface->get_run_attributes = ev_view_accessible_get_run_attributes;
718 iface->get_default_attributes = ev_view_accessible_get_default_attributes;
719 iface->get_character_extents = ev_view_accessible_get_character_extents;
720 iface->get_offset_at_point = ev_view_accessible_get_offset_at_point;
725 ev_view_accessible_idle_do_action (gpointer data)
727 EvViewAccessiblePriv* priv = EV_VIEW_ACCESSIBLE_GET_PRIVATE (data);
729 ev_view_scroll (EV_VIEW (gtk_accessible_get_widget (GTK_ACCESSIBLE (data))),
732 priv->action_idle_handler = 0;
737 ev_view_accessible_action_do_action (AtkAction *action,
740 EvViewAccessiblePriv* priv = EV_VIEW_ACCESSIBLE_GET_PRIVATE (action);
742 if (gtk_accessible_get_widget (GTK_ACCESSIBLE (action)) == NULL)
745 if (priv->action_idle_handler)
749 case ACTION_SCROLL_UP:
750 priv->idle_scroll = GTK_SCROLL_PAGE_BACKWARD;
752 case ACTION_SCROLL_DOWN:
753 priv->idle_scroll = GTK_SCROLL_PAGE_FORWARD;
758 priv->action_idle_handler = g_idle_add (ev_view_accessible_idle_do_action,
764 ev_view_accessible_action_get_n_actions (AtkAction *action)
770 ev_view_accessible_action_get_description (AtkAction *action,
773 EvViewAccessiblePriv* priv = EV_VIEW_ACCESSIBLE_GET_PRIVATE (action);
775 if (i < 0 || i >= LAST_ACTION)
778 if (priv->action_descriptions[i])
779 return priv->action_descriptions[i];
781 return ev_view_accessible_action_descriptions[i];
785 ev_view_accessible_action_get_name (AtkAction *action,
788 if (i < 0 || i >= LAST_ACTION)
791 return ev_view_accessible_action_names[i];
795 ev_view_accessible_action_set_description (AtkAction *action,
797 const gchar *description)
799 EvViewAccessiblePriv* priv = EV_VIEW_ACCESSIBLE_GET_PRIVATE (action);
800 gchar *old_description;
802 if (i < 0 || i >= LAST_ACTION)
805 old_description = priv->action_descriptions[i];
806 priv->action_descriptions[i] = g_strdup (description);
807 g_free (old_description);
812 static void ev_view_accessible_action_iface_init (AtkActionIface * iface)
814 iface->do_action = ev_view_accessible_action_do_action;
815 iface->get_n_actions = ev_view_accessible_action_get_n_actions;
816 iface->get_description = ev_view_accessible_action_get_description;
817 iface->get_name = ev_view_accessible_action_get_name;
818 iface->set_description = ev_view_accessible_action_set_description;
821 GType ev_view_accessible_get_type (void)
823 static GType type = 0;
825 if (G_UNLIKELY (type == 0)) {
828 (GBaseInitFunc) NULL, /* base init */
829 (GBaseFinalizeFunc) NULL, /* base finalize */
830 (GClassInitFunc) ev_view_accessible_class_init, /* class init */
831 (GClassFinalizeFunc) NULL, /* class finalize */
832 NULL, /* class data */
833 0, /* instance size */
834 0, /* nb preallocs */
835 (GInstanceInitFunc) NULL, /* instance init */
836 NULL /* value table */
839 const GInterfaceInfo atk_text_info = {
841 ev_view_accessible_text_iface_init,
842 (GInterfaceFinalizeFunc) NULL,
846 const GInterfaceInfo atk_action_info = {
848 ev_view_accessible_action_iface_init,
849 (GInterfaceFinalizeFunc) NULL,
853 * Figure out the size of the class and instance
854 * we are deriving from
856 AtkObjectFactory *factory;
859 GType derived_atk_type;
861 derived_type = g_type_parent (EV_TYPE_VIEW);
862 factory = atk_registry_get_factory (atk_get_default_registry (),
864 derived_atk_type = atk_object_factory_get_accessible_type (factory);
866 g_type_query (derived_atk_type, &query);
867 tinfo.class_size = query.class_size;
868 tinfo.instance_size = query.instance_size;
870 type = g_type_register_static (derived_atk_type, "EvViewAccessible",
872 g_type_add_interface_static (type, ATK_TYPE_TEXT,
874 g_type_add_interface_static (type, ATK_TYPE_ACTION,
881 static AtkObject *ev_view_accessible_new(GObject * obj)
883 AtkObject *accessible;
885 g_return_val_if_fail(EV_IS_VIEW (obj), NULL);
887 accessible = g_object_new (ev_view_accessible_get_type (), NULL);
888 atk_object_initialize (accessible, obj);
890 atk_object_set_name (ATK_OBJECT (accessible), _("Document View"));
891 atk_object_set_role (ATK_OBJECT (accessible), ATK_ROLE_UNKNOWN);
896 typedef AtkObjectFactory EvViewAccessibleFactory;
897 typedef AtkObjectFactoryClass EvViewAccessibleFactoryClass;
899 static void ev_view_accessible_factory_init (EvViewAccessibleFactory *factory)
903 static GType ev_view_accessible_factory_get_accessible_type(void)
905 return ev_view_accessible_get_type();
908 static AtkObject *ev_view_accessible_factory_create_accessible (GObject * obj)
910 return ev_view_accessible_new(obj);
913 static void ev_view_accessible_factory_class_init (AtkObjectFactoryClass * klass)
915 klass->create_accessible = ev_view_accessible_factory_create_accessible;
916 klass->get_accessible_type =
917 ev_view_accessible_factory_get_accessible_type;
920 G_DEFINE_TYPE (EvViewAccessibleFactory, ev_view_accessible_factory, ATK_TYPE_OBJECT_FACTORY)