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/* 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.
*/
#include <gtk/gtk.h>
#include <libgnomecanvas/libgnomecanvas.h>
#include "gailcanvasitem.h"
#include "gailcanvastext.h"
#include <libgail-util/gail-util.h>
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_RICH_TEXT (obj))
{
gail_text_util_buffer_setup (gail_text->textutil,
gnome_canvas_rich_text_get_buffer (GNOME_CANVAS_RICH_TEXT (obj)));
}
else 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);
}
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