/* GAIL - The GNOME Accessibility Implementation Library
* Copyright 2004 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 "config.h"
#include <string.h>
#include <gtk/gtk.h>
#include "gailscale.h"
#include <libgail-util/gailmisc.h>
static void gail_scale_class_init (GailScaleClass *klass);
static void gail_scale_init (GailScale *scale);
static void gail_scale_real_initialize (AtkObject *obj,
gpointer data);
static void gail_scale_notify (GObject *obj,
GParamSpec *pspec);
static void gail_scale_finalize (GObject *object);
/* atktext.h */
static void atk_text_interface_init (AtkTextIface *iface);
static gchar* gail_scale_get_text (AtkText *text,
gint start_pos,
gint end_pos);
static gunichar gail_scale_get_character_at_offset
(AtkText *text,
gint offset);
static gchar* gail_scale_get_text_before_offset
(AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset);
static gchar* gail_scale_get_text_at_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset);
static gchar* gail_scale_get_text_after_offset
(AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset);
static gint gail_scale_get_character_count (AtkText *text);
static void gail_scale_get_character_extents
(AtkText *text,
gint offset,
gint *x,
gint *y,
gint *width,
gint *height,
AtkCoordType coords);
static gint gail_scale_get_offset_at_point (AtkText *text,
gint x,
gint y,
AtkCoordType coords);
static AtkAttributeSet* gail_scale_get_run_attributes
(AtkText *text,
gint offset,
gint *start_offset,
gint *end_offset);
static AtkAttributeSet* gail_scale_get_default_attributes
(AtkText *text);
G_DEFINE_TYPE_WITH_CODE (GailScale, gail_scale, GAIL_TYPE_RANGE,
G_IMPLEMENT_INTERFACE (ATK_TYPE_TEXT, atk_text_interface_init))
static void
gail_scale_class_init (GailScaleClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
class->initialize = gail_scale_real_initialize;
gobject_class->finalize = gail_scale_finalize;
gobject_class->notify = gail_scale_notify;
}
static void
gail_scale_init (GailScale *scale)
{
}
static void
gail_scale_real_initialize (AtkObject *obj,
gpointer data)
{
GailScale *gail_scale;
const gchar *txt;
PangoLayout *layout;
ATK_OBJECT_CLASS (gail_scale_parent_class)->initialize (obj, data);
gail_scale = GAIL_SCALE (obj);
gail_scale->textutil = gail_text_util_new ();
layout = gtk_scale_get_layout (GTK_SCALE (data));
if (layout)
{
txt = pango_layout_get_text (layout);
if (txt)
{
gail_text_util_text_setup (gail_scale->textutil, txt);
}
}
}
static void
gail_scale_finalize (GObject *object)
{
GailScale *scale = GAIL_SCALE (object);
g_object_unref (scale->textutil);
G_OBJECT_CLASS (gail_scale_parent_class)->finalize (object);
}
static void
gail_scale_notify (GObject *obj,
GParamSpec *pspec)
{
GailScale *scale = GAIL_SCALE (obj);
if (strcmp (pspec->name, "accessible-value") == 0)
{
GtkWidget *widget;
widget = GTK_ACCESSIBLE (obj)->widget;
if (widget)
{
GtkScale *gtk_scale;
PangoLayout *layout;
const gchar *txt;
gtk_scale = GTK_SCALE (widget);
layout = gtk_scale_get_layout (gtk_scale);
if (layout)
{
txt = pango_layout_get_text (layout);
if (txt)
{
g_signal_emit_by_name (obj, "text_changed::delete", 0,
gtk_text_buffer_get_char_count (scale->textutil->buffer));
gail_text_util_text_setup (scale->textutil, txt);
g_signal_emit_by_name (obj, "text_changed::insert", 0,
g_utf8_strlen (txt, -1));
}
}
}
}
G_OBJECT_CLASS (gail_scale_parent_class)->notify (obj, pspec);
}
/* atktext.h */
static void
atk_text_interface_init (AtkTextIface *iface)
{
iface->get_text = gail_scale_get_text;
iface->get_character_at_offset = gail_scale_get_character_at_offset;
iface->get_text_before_offset = gail_scale_get_text_before_offset;
iface->get_text_at_offset = gail_scale_get_text_at_offset;
iface->get_text_after_offset = gail_scale_get_text_after_offset;
iface->get_character_count = gail_scale_get_character_count;
iface->get_character_extents = gail_scale_get_character_extents;
iface->get_offset_at_point = gail_scale_get_offset_at_point;
iface->get_run_attributes = gail_scale_get_run_attributes;
iface->get_default_attributes = gail_scale_get_default_attributes;
}
static gchar*
gail_scale_get_text (AtkText *text,
gint start_pos,
gint end_pos)
{
GtkWidget *widget;
GailScale *scale;
widget = GTK_ACCESSIBLE (text)->widget;
if (widget == NULL)
/* State is defunct */
return NULL;
scale = GAIL_SCALE (text);
return gail_text_util_get_substring (scale->textutil,
start_pos, end_pos);
}
static gchar*
gail_scale_get_text_before_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
GtkWidget *widget;
GailScale *scale;
PangoLayout *layout;
gchar *txt;
widget = GTK_ACCESSIBLE (text)->widget;
if (widget == NULL)
/* State is defunct */
return NULL;
scale = GAIL_SCALE (text);
layout = gtk_scale_get_layout (GTK_SCALE (widget));
if (layout)
{
txt = gail_text_util_get_text (scale->textutil,
layout, GAIL_BEFORE_OFFSET,
boundary_type, offset, start_offset, end_offset);
}
else
txt = NULL;
return txt;
}
static gchar*
gail_scale_get_text_at_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
GtkWidget *widget;
GailScale *scale;
PangoLayout *layout;
gchar *txt;
widget = GTK_ACCESSIBLE (text)->widget;
if (widget == NULL)
/* State is defunct */
return NULL;
scale = GAIL_SCALE (text);
layout = gtk_scale_get_layout (GTK_SCALE (widget));
if (layout)
{
txt = gail_text_util_get_text (scale->textutil,
layout, GAIL_AT_OFFSET,
boundary_type, offset, start_offset, end_offset);
}
else
txt = NULL;
return txt;
}
static gchar*
gail_scale_get_text_after_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
GtkWidget *widget;
GailScale *scale;
PangoLayout *layout;
gchar *txt;
widget = GTK_ACCESSIBLE (text)->widget;
if (widget == NULL)
/* State is defunct */
return NULL;
scale = GAIL_SCALE (text);
layout = gtk_scale_get_layout (GTK_SCALE (widget));
if (layout)
{
txt = gail_text_util_get_text (scale->textutil,
layout, GAIL_AFTER_OFFSET,
boundary_type, offset, start_offset, end_offset);
}
else
txt = NULL;
return txt;
}
static gint
gail_scale_get_character_count (AtkText *text)
{
GtkWidget *widget;
GailScale *scale;
widget = GTK_ACCESSIBLE (text)->widget;
if (widget == NULL)
/* State is defunct */
return 0;
scale = GAIL_SCALE (text);
if (scale->textutil->buffer)
return gtk_text_buffer_get_char_count (scale->textutil->buffer);
else
return 0;
}
static void
gail_scale_get_character_extents (AtkText *text,
gint offset,
gint *x,
gint *y,
gint *width,
gint *height,
AtkCoordType coords)
{
GtkWidget *widget;
GtkScale *scale;
PangoRectangle char_rect;
PangoLayout *layout;
gint index, x_layout, y_layout;
const gchar *scale_text;
widget = GTK_ACCESSIBLE (text)->widget;
if (widget == NULL)
/* State is defunct */
return;
scale = GTK_SCALE (widget);
layout = gtk_scale_get_layout (scale);
if (!layout)
return;
scale_text = pango_layout_get_text (layout);
if (!scale_text)
return;
index = g_utf8_offset_to_pointer (scale_text, offset) - scale_text;
gtk_scale_get_layout_offsets (scale, &x_layout, &y_layout);
pango_layout_index_to_pos (layout, index, &char_rect);
gail_misc_get_extents_from_pango_rectangle (widget, &char_rect,
x_layout, y_layout, x, y, width, height, coords);
}
static gint
gail_scale_get_offset_at_point (AtkText *text,
gint x,
gint y,
AtkCoordType coords)
{
GtkWidget *widget;
GtkScale *scale;
PangoLayout *layout;
gint index, x_layout, y_layout;
const gchar *scale_text;
widget = GTK_ACCESSIBLE (text)->widget;
if (widget == NULL)
/* State is defunct */
return -1;
scale = GTK_SCALE (widget);
layout = gtk_scale_get_layout (scale);
if (!layout)
return -1;
scale_text = pango_layout_get_text (layout);
if (!scale_text)
return -1;
gtk_scale_get_layout_offsets (scale, &x_layout, &y_layout);
index = gail_misc_get_index_at_point_in_layout (widget,
layout,
x_layout, y_layout, x, y, coords);
if (index == -1)
{
if (coords == ATK_XY_WINDOW || coords == ATK_XY_SCREEN)
index = g_utf8_strlen (scale_text, -1);
}
else
index = g_utf8_pointer_to_offset (scale_text, scale_text + index);
return index;
}
static AtkAttributeSet*
gail_scale_get_run_attributes (AtkText *text,
gint offset,
gint *start_offset,
gint *end_offset)
{
GtkWidget *widget;
GtkScale *scale;
AtkAttributeSet *at_set = NULL;
GtkTextDirection dir;
PangoLayout *layout;
const gchar *scale_text;
widget = GTK_ACCESSIBLE (text)->widget;
if (widget == NULL)
/* State is defunct */
return NULL;
scale = GTK_SCALE (widget);
layout = gtk_scale_get_layout (scale);
if (!layout)
return at_set;
scale_text = pango_layout_get_text (layout);
if (!scale_text)
return at_set;
dir = gtk_widget_get_direction (widget);
if (dir == GTK_TEXT_DIR_RTL)
{
at_set = gail_misc_add_attribute (at_set,
ATK_TEXT_ATTR_DIRECTION,
g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_DIRECTION, dir)));
}
at_set = gail_misc_layout_get_run_attributes (at_set,
layout,
(gchar *)scale_text,
offset,
start_offset,
end_offset);
return at_set;
}
static AtkAttributeSet*
gail_scale_get_default_attributes (AtkText *text)
{
GtkWidget *widget;
AtkAttributeSet *at_set = NULL;
PangoLayout *layout;
widget = GTK_ACCESSIBLE (text)->widget;
if (widget == NULL)
/* State is defunct */
return NULL;
layout = gtk_scale_get_layout (GTK_SCALE (widget));
if (layout)
{
at_set = gail_misc_get_default_attributes (at_set,
layout,
widget);
}
return at_set;
}
static gunichar
gail_scale_get_character_at_offset (AtkText *text,
gint offset)
{
GtkWidget *widget;
GtkScale *scale;
PangoLayout *layout;
const gchar *string;
gchar *index;
gunichar c;
widget = GTK_ACCESSIBLE (text)->widget;
if (widget == NULL)
/* State is defunct */
return '\0';
scale = GTK_SCALE (widget);
layout = gtk_scale_get_layout (scale);
if (!layout)
return '\0';
string = pango_layout_get_text (layout);
if (offset >= g_utf8_strlen (string, -1))
c = '\0';
else
{
index = g_utf8_offset_to_pointer (string, offset);
c = g_utf8_get_char (index);
}
return c;
}