gtk2/modules/other/gail/gailimage.c

283 lines
7.6 KiB
C

/* 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 "config.h"
#include <string.h>
#include <gtk/gtk.h>
#include "gailimage.h"
static void gail_image_class_init (GailImageClass *klass);
static void gail_image_init (GailImage *image);
static void gail_image_initialize (AtkObject *accessible,
gpointer data);
static G_CONST_RETURN gchar* gail_image_get_name (AtkObject *accessible);
static void atk_image_interface_init (AtkImageIface *iface);
static G_CONST_RETURN gchar *
gail_image_get_image_description (AtkImage *image);
static void gail_image_get_image_position (AtkImage *image,
gint *x,
gint *y,
AtkCoordType coord_type);
static void gail_image_get_image_size (AtkImage *image,
gint *width,
gint *height);
static gboolean gail_image_set_image_description (AtkImage *image,
const gchar *description);
static void gail_image_finalize (GObject *object);
G_DEFINE_TYPE_WITH_CODE (GailImage, gail_image, GAIL_TYPE_WIDGET,
G_IMPLEMENT_INTERFACE (ATK_TYPE_IMAGE, atk_image_interface_init))
static void
gail_image_class_init (GailImageClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
gobject_class->finalize = gail_image_finalize;
class->initialize = gail_image_initialize;
class->get_name = gail_image_get_name;
}
static void
gail_image_init (GailImage *image)
{
image->image_description = NULL;
}
static void
gail_image_initialize (AtkObject *accessible,
gpointer data)
{
ATK_OBJECT_CLASS (gail_image_parent_class)->initialize (accessible, data);
accessible->role = ATK_ROLE_ICON;
}
/* Copied from gtktoolbar.c, keep in sync */
static gchar *
elide_underscores (const gchar *original)
{
gchar *q, *result;
const gchar *p, *end;
gsize len;
gboolean last_underscore;
if (!original)
return NULL;
len = strlen (original);
q = result = g_malloc (len + 1);
last_underscore = FALSE;
end = original + len;
for (p = original; p < end; p++)
{
if (!last_underscore && *p == '_')
last_underscore = TRUE;
else
{
last_underscore = FALSE;
if (original + 2 <= p && p + 1 <= end &&
p[-2] == '(' && p[-1] == '_' && p[0] != '_' && p[1] == ')')
{
q--;
*q = '\0';
p++;
}
else
*q++ = *p;
}
}
if (last_underscore)
*q++ = '_';
*q = '\0';
return result;
}
static G_CONST_RETURN gchar*
gail_image_get_name (AtkObject *accessible)
{
GtkWidget* widget;
GtkImage *image;
GailImage *image_accessible;
GtkStockItem stock_item;
const gchar *name;
name = ATK_OBJECT_CLASS (gail_image_parent_class)->get_name (accessible);
if (name)
return name;
widget = GTK_ACCESSIBLE (accessible)->widget;
/*
* State is defunct
*/
if (widget == NULL)
return NULL;
g_return_val_if_fail (GTK_IS_IMAGE (widget), NULL);
image = GTK_IMAGE (widget);
image_accessible = GAIL_IMAGE (accessible);
g_free (image_accessible->stock_name);
image_accessible->stock_name = NULL;
if (image->storage_type != GTK_IMAGE_STOCK ||
image->data.stock.stock_id == NULL)
return NULL;
if (!gtk_stock_lookup (image->data.stock.stock_id, &stock_item))
return NULL;
image_accessible->stock_name = elide_underscores (stock_item.label);
return image_accessible->stock_name;
}
static void
atk_image_interface_init (AtkImageIface *iface)
{
iface->get_image_description = gail_image_get_image_description;
iface->get_image_position = gail_image_get_image_position;
iface->get_image_size = gail_image_get_image_size;
iface->set_image_description = gail_image_set_image_description;
}
static G_CONST_RETURN gchar *
gail_image_get_image_description (AtkImage *image)
{
GailImage* aimage = GAIL_IMAGE (image);
return aimage->image_description;
}
static void
gail_image_get_image_position (AtkImage *image,
gint *x,
gint *y,
AtkCoordType coord_type)
{
atk_component_get_position (ATK_COMPONENT (image), x, y, coord_type);
}
static void
gail_image_get_image_size (AtkImage *image,
gint *width,
gint *height)
{
GtkWidget* widget;
GtkImage *gtk_image;
GtkImageType image_type;
widget = GTK_ACCESSIBLE (image)->widget;
if (widget == 0)
{
/* State is defunct */
*height = -1;
*width = -1;
return;
}
gtk_image = GTK_IMAGE(widget);
image_type = gtk_image_get_storage_type(gtk_image);
switch(image_type) {
case GTK_IMAGE_PIXMAP:
{
GdkPixmap *pixmap;
gtk_image_get_pixmap(gtk_image, &pixmap, NULL);
gdk_drawable_get_size (pixmap, width, height);
break;
}
case GTK_IMAGE_PIXBUF:
{
GdkPixbuf *pixbuf;
pixbuf = gtk_image_get_pixbuf(gtk_image);
*height = gdk_pixbuf_get_height(pixbuf);
*width = gdk_pixbuf_get_width(pixbuf);
break;
}
case GTK_IMAGE_IMAGE:
{
GdkImage *gdk_image;
gtk_image_get_image(gtk_image, &gdk_image, NULL);
*height = gdk_image->height;
*width = gdk_image->width;
break;
}
case GTK_IMAGE_STOCK:
case GTK_IMAGE_ICON_SET:
case GTK_IMAGE_ICON_NAME:
case GTK_IMAGE_GICON:
{
GtkIconSize size;
GtkSettings *settings;
settings = gtk_settings_get_for_screen (gtk_widget_get_screen (widget));
g_object_get (gtk_image, "icon-size", &size, NULL);
gtk_icon_size_lookup_for_settings (settings, size, width, height);
break;
}
case GTK_IMAGE_ANIMATION:
{
GdkPixbufAnimation *animation;
animation = gtk_image_get_animation(gtk_image);
*height = gdk_pixbuf_animation_get_height(animation);
*width = gdk_pixbuf_animation_get_width(animation);
break;
}
default:
{
*height = -1;
*width = -1;
break;
}
}
}
static gboolean
gail_image_set_image_description (AtkImage *image,
const gchar *description)
{
GailImage* aimage = GAIL_IMAGE (image);
g_free (aimage->image_description);
aimage->image_description = g_strdup (description);
return TRUE;
}
static void
gail_image_finalize (GObject *object)
{
GailImage *aimage = GAIL_IMAGE (object);
g_free (aimage->image_description);
g_free (aimage->stock_name);
G_OBJECT_CLASS (gail_image_parent_class)->finalize (object);
}