/* GAIL - The GNOME Accessibility Implementation Library * Copyright 2001 Sun Microsystems Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #ifdef HAVE_CONFIG_H #include #endif #include #include #include "gailcanvasitem.h" #include "gailcanvastext.h" #include struct _GailCanvasText { GailCanvasItem parent; GailTextUtil *textutil; }; static void gail_canvas_text_text_interface_init (AtkTextIface *iface); static gchar * gail_canvas_text_get_text (AtkText *text, gint start_offset, gint end_offset); static gchar * gail_canvas_text_get_text_after_offset (AtkText *text, gint offset, AtkTextBoundary boundary_type, gint *start_offset, gint *end_offset); static gchar * gail_canvas_text_get_text_at_offset (AtkText *text, gint offset, AtkTextBoundary boundary_type, gint *start_offset, gint *end_offset); static gchar * gail_canvas_text_get_text_before_offset (AtkText *text, gint offset, AtkTextBoundary boundary_type, gint *start_offset, gint *end_offset); static gunichar gail_canvas_text_get_character_at_offset (AtkText *text, gint offset); static gint gail_canvas_text_get_character_count (AtkText *text); static gint gail_canvas_text_get_caret_offset (AtkText *text); static gboolean gail_canvas_text_set_caret_offset (AtkText *text, gint offset); static gint gail_canvas_text_get_offset_at_point (AtkText *text, gint x, gint y, AtkCoordType coords); static void gail_canvas_text_get_character_extents (AtkText *text, gint offset, gint *x, gint *y, gint *width, gint *height, AtkCoordType coords); static AtkAttributeSet * gail_canvas_text_get_run_attributes (AtkText *text, gint offset, gint *start_offset, gint *end_offset); static AtkAttributeSet * gail_canvas_text_get_default_attributes (AtkText *text); static gint gail_canvas_text_get_n_selections (AtkText *text); static gchar * gail_canvas_text_get_selection (AtkText *text, gint selection_num, gint *start_pos, gint *end_pos); static gboolean gail_canvas_text_add_selection (AtkText *text, gint start_pos, gint end_pos); static gboolean gail_canvas_text_remove_selection (AtkText *text, gint selection_num); static gboolean gail_canvas_text_set_selection (AtkText *text, gint selection_num, gint start_pos, gint end_pos); static gchar * get_text_near_offset (AtkText *text, GailOffsetType function, AtkTextBoundary boundary_type, gint offset, gint *start_offset, gint *end_offset); G_DEFINE_TYPE_WITH_CODE (GailCanvasText, gail_canvas_text, GAIL_TYPE_CANVAS_ITEM, G_IMPLEMENT_INTERFACE (ATK_TYPE_TEXT, gail_canvas_text_text_interface_init);) static void gail_canvas_text_init (GailCanvasText *foo) { ; } AtkObject * gail_canvas_text_new (GObject *obj) { gpointer object; AtkObject *atk_object; GailCanvasText *gail_text; g_return_val_if_fail (GNOME_IS_CANVAS_ITEM (obj), NULL); object = g_object_new (GAIL_TYPE_CANVAS_TEXT, NULL); atk_object = ATK_OBJECT (object); gail_text = GAIL_CANVAS_TEXT (object); atk_object_initialize (atk_object, obj); gail_text->textutil = gail_text_util_new (); if (GNOME_IS_CANVAS_TEXT (obj)) { gail_text_util_text_setup (gail_text->textutil, GNOME_CANVAS_TEXT (obj)->text); } atk_object->role = ATK_ROLE_TEXT; return atk_object; } static void gail_canvas_text_class_init (GailCanvasTextClass *klass) { } static void gail_canvas_text_text_interface_init (AtkTextIface *iface) { g_return_if_fail (iface != NULL); iface->get_text = gail_canvas_text_get_text; iface->get_text_after_offset = gail_canvas_text_get_text_after_offset; iface->get_text_at_offset = gail_canvas_text_get_text_at_offset; iface->get_text_before_offset = gail_canvas_text_get_text_before_offset; iface->get_character_at_offset = gail_canvas_text_get_character_at_offset; iface->get_character_count = gail_canvas_text_get_character_count; iface->get_caret_offset = gail_canvas_text_get_caret_offset; iface->set_caret_offset = gail_canvas_text_set_caret_offset; iface->get_offset_at_point = gail_canvas_text_get_offset_at_point; iface->get_character_extents = gail_canvas_text_get_character_extents; iface->get_n_selections = gail_canvas_text_get_n_selections; iface->get_selection = gail_canvas_text_get_selection; iface->add_selection = gail_canvas_text_add_selection; iface->remove_selection = gail_canvas_text_remove_selection; iface->set_selection = gail_canvas_text_set_selection; iface->get_run_attributes = gail_canvas_text_get_run_attributes; iface->get_default_attributes = gail_canvas_text_get_default_attributes; } static gchar * gail_canvas_text_get_text (AtkText *text, gint start_offset, gint end_offset) { GailCanvasText *gail_text; GtkTextBuffer *buffer; GtkTextIter start, end; g_return_val_if_fail (GAIL_IS_CANVAS_TEXT (text), NULL); gail_text = GAIL_CANVAS_TEXT (text); g_return_val_if_fail (gail_text->textutil, NULL); buffer = gail_text->textutil->buffer; gtk_text_buffer_get_iter_at_offset (buffer, &start, start_offset); gtk_text_buffer_get_iter_at_offset (buffer, &end, end_offset); return gtk_text_buffer_get_text (buffer, &start, &end, FALSE); } static gchar * gail_canvas_text_get_text_after_offset (AtkText *text, gint offset, AtkTextBoundary boundary_type, gint *start_offset, gint *end_offset) { return get_text_near_offset (text, GAIL_AFTER_OFFSET, boundary_type, offset, start_offset, end_offset); } static gchar * gail_canvas_text_get_text_at_offset (AtkText *text, gint offset, AtkTextBoundary boundary_type, gint *start_offset, gint *end_offset) { return get_text_near_offset (text, GAIL_AT_OFFSET, boundary_type, offset, start_offset, end_offset); } static gchar * gail_canvas_text_get_text_before_offset (AtkText *text, gint offset, AtkTextBoundary boundary_type, gint *start_offset, gint *end_offset) { return get_text_near_offset (text, GAIL_BEFORE_OFFSET, boundary_type, offset, start_offset, end_offset); } static gunichar gail_canvas_text_get_character_at_offset (AtkText *text, gint offset) { GailCanvasText *gail_item; GtkTextIter start, end; GtkTextBuffer *buffer; gchar *string; gchar *index; gunichar unichar; g_return_val_if_fail (GAIL_IS_CANVAS_TEXT (text), '\0'); gail_item = GAIL_CANVAS_TEXT (text); buffer = gail_item->textutil->buffer; if (offset >= gtk_text_buffer_get_char_count (buffer)) return '\0'; gtk_text_buffer_get_start_iter (buffer, &start); gtk_text_buffer_get_end_iter (buffer, &end); string = gtk_text_buffer_get_text (buffer, &start, &end, FALSE); index = g_utf8_offset_to_pointer (string, offset); unichar = g_utf8_get_char (index); g_free (string); return unichar; } static gint gail_canvas_text_get_character_count (AtkText *text) { GtkTextBuffer *buffer; GailCanvasText *gail_text; g_return_val_if_fail (GAIL_IS_CANVAS_TEXT (text), 0); gail_text = GAIL_CANVAS_TEXT (text); g_return_val_if_fail (gail_text->textutil, 0); buffer = gail_text->textutil->buffer; return gtk_text_buffer_get_char_count (buffer); } static gint gail_canvas_text_get_caret_offset (AtkText *text) { GailCanvasText *gail_text; GtkTextBuffer *buffer; GtkTextMark *cursor_mark; GtkTextIter cursor_itr; g_return_val_if_fail (GAIL_IS_CANVAS_TEXT (text), 0); gail_text = GAIL_CANVAS_TEXT (text); g_return_val_if_fail (gail_text->textutil, 0); buffer = gail_text->textutil->buffer; cursor_mark = gtk_text_buffer_get_insert (buffer); gtk_text_buffer_get_iter_at_mark (buffer, &cursor_itr, cursor_mark); return gtk_text_iter_get_offset (&cursor_itr); } static gboolean gail_canvas_text_set_caret_offset (AtkText *text, gint offset) { GailCanvasText *gail_text; GtkTextBuffer *buffer; GtkTextIter pos_itr; g_return_val_if_fail (GAIL_IS_CANVAS_TEXT (text), FALSE); gail_text = GAIL_CANVAS_TEXT (text); g_return_val_if_fail (gail_text->textutil, FALSE); buffer = gail_text->textutil->buffer; gtk_text_buffer_get_iter_at_offset (buffer, &pos_itr, offset); gtk_text_buffer_move_mark_by_name (buffer, "insert", &pos_itr); return TRUE; } static gint gail_canvas_text_get_offset_at_point (AtkText *text, gint x, gint y, AtkCoordType coords) { return -1; } static void gail_canvas_text_get_character_extents (AtkText *text, gint offset, gint *x, gint *y, gint *width, gint *height, AtkCoordType coords) { return; } static AtkAttributeSet * gail_canvas_text_get_run_attributes (AtkText *text, gint offset, gint *start_offset, gint *end_offset) { GailCanvasText *gail_text; g_return_val_if_fail (GAIL_IS_CANVAS_TEXT (text), NULL); gail_text = GAIL_CANVAS_TEXT (text); g_return_val_if_fail (gail_text->textutil, NULL); return gail_misc_buffer_get_run_attributes (gail_text->textutil->buffer, offset, start_offset, end_offset); } static AtkAttributeSet * gail_canvas_text_get_default_attributes (AtkText *text) { return NULL; } static gint gail_canvas_text_get_n_selections (AtkText *text) { GailCanvasText *gail_text; GtkTextBuffer *buffer; GtkTextIter start, end; gint select_start, select_end; g_return_val_if_fail (GAIL_IS_CANVAS_TEXT (text), -1); gail_text = GAIL_CANVAS_TEXT (text); g_return_val_if_fail (gail_text->textutil, -1); buffer = gail_text->textutil->buffer; gtk_text_buffer_get_selection_bounds (buffer, &start, &end); select_start = gtk_text_iter_get_offset (&start); select_end = gtk_text_iter_get_offset (&end); if (select_start != select_end) return 1; else return 0; } static gchar * gail_canvas_text_get_selection (AtkText *text, gint selection_num, gint *start_pos, gint *end_pos) { GailCanvasText *gail_text; GtkTextBuffer *buffer; GtkTextIter start, end; /* Only let the user get the selection if one is set, and if the * selection_num is 0. */ if (selection_num != 0) return NULL; g_return_val_if_fail (GAIL_IS_CANVAS_TEXT (text), NULL); gail_text = GAIL_CANVAS_TEXT (text); g_return_val_if_fail (gail_text->textutil, NULL); buffer = gail_text->textutil->buffer; gtk_text_buffer_get_selection_bounds (buffer, &start, &end); *start_pos = gtk_text_iter_get_offset (&start); *end_pos = gtk_text_iter_get_offset (&end); if (*start_pos != *end_pos) return gtk_text_buffer_get_text (buffer, &start, &end, FALSE); else return NULL; } static gboolean gail_canvas_text_add_selection (AtkText *text, gint start_pos, gint end_pos) { GailCanvasText *gail_text; GtkTextBuffer *buffer; GtkTextIter pos_itr; GtkTextIter start, end; gint select_start, select_end; g_return_val_if_fail (GAIL_IS_CANVAS_TEXT (text), FALSE); gail_text = GAIL_CANVAS_TEXT (text); g_return_val_if_fail (gail_text->textutil, FALSE); buffer = gail_text->textutil->buffer; gtk_text_buffer_get_selection_bounds (buffer, &start, &end); select_start = gtk_text_iter_get_offset (&start); select_end = gtk_text_iter_get_offset (&end); /* If there is already a selection, then don't allow another to be added, * since GtkTextView only supports one selected region. */ if (select_start == select_end) { gtk_text_buffer_get_iter_at_offset (buffer, &pos_itr, start_pos); gtk_text_buffer_move_mark_by_name (buffer, "insert", &pos_itr); gtk_text_buffer_get_iter_at_offset (buffer, &pos_itr, end_pos); gtk_text_buffer_move_mark_by_name (buffer, "selection_bound", &pos_itr); return TRUE; } else return FALSE; } static gboolean gail_canvas_text_remove_selection (AtkText *text, gint selection_num) { GailCanvasText *gail_text; GtkTextBuffer *buffer; GtkTextMark *cursor_mark; GtkTextIter cursor_itr; GtkTextIter start, end; gint select_start, select_end; if (selection_num != 0) return FALSE; g_return_val_if_fail (GAIL_IS_CANVAS_TEXT (text), FALSE); gail_text = GAIL_CANVAS_TEXT (text); g_return_val_if_fail (gail_text->textutil, FALSE); buffer = gail_text->textutil->buffer; gtk_text_buffer_get_selection_bounds (buffer, &start, &end); select_start = gtk_text_iter_get_offset (&start); select_end = gtk_text_iter_get_offset (&end); if (select_start != select_end) { /* Setting the start & end of the selected region to the caret position * turns off the selection. */ cursor_mark = gtk_text_buffer_get_insert (buffer); gtk_text_buffer_get_iter_at_mark (buffer, &cursor_itr, cursor_mark); gtk_text_buffer_move_mark_by_name (buffer, "insert", &cursor_itr); gtk_text_buffer_move_mark_by_name (buffer, "selection_bound", &cursor_itr); return TRUE; } else return FALSE; } static gboolean gail_canvas_text_set_selection (AtkText *text, gint selection_num, gint start_pos, gint end_pos) { GailCanvasText *gail_text; GtkTextBuffer *buffer; GtkTextIter pos_itr; GtkTextIter start, end; gint select_start, select_end; /* Only let the user move the selection if one is set, and if the * selection_num is 0 */ if (selection_num != 0) return FALSE; g_return_val_if_fail (GAIL_IS_CANVAS_TEXT (text), FALSE); gail_text = GAIL_CANVAS_TEXT (text); g_return_val_if_fail (gail_text->textutil, FALSE); buffer = gail_text->textutil->buffer; gtk_text_buffer_get_selection_bounds (buffer, &start, &end); select_start = gtk_text_iter_get_offset (&start); select_end = gtk_text_iter_get_offset (&end); if (select_start != select_end) { gtk_text_buffer_get_iter_at_offset (buffer, &pos_itr, start_pos); gtk_text_buffer_move_mark_by_name (buffer, "insert", &pos_itr); gtk_text_buffer_get_iter_at_offset (buffer, &pos_itr, end_pos); gtk_text_buffer_move_mark_by_name (buffer, "selection_bound", &pos_itr); return TRUE; } else return FALSE; } static gchar * get_text_near_offset (AtkText *text, GailOffsetType function, AtkTextBoundary boundary_type, gint offset, gint *start_offset, gint *end_offset) { return gail_text_util_get_text (GAIL_CANVAS_TEXT (text)->textutil, NULL, function, boundary_type, offset, start_offset, end_offset); }