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/* GTK - The GIMP Toolkit
* Copyright (C) 2011 Red Hat, 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkcssimagevalueprivate.h"
#include "gtkcssimagecrossfadeprivate.h"
struct _GtkCssValue {
GTK_CSS_VALUE_BASE
GtkCssImage *image;
};
static void
gtk_css_value_image_free (GtkCssValue *value)
{
g_object_unref (value->image);
g_slice_free (GtkCssValue, value);
}
static GtkCssValue *
gtk_css_value_image_compute (GtkCssValue *value,
guint property_id,
GtkStyleContext *context)
{
GtkCssImage *image, *computed;
image = _gtk_css_image_value_get_image (value);
if (image == NULL)
return _gtk_css_value_ref (value);
computed = _gtk_css_image_compute (image, property_id, context);
if (computed == image)
{
g_object_unref (computed);
return _gtk_css_value_ref (value);
}
return _gtk_css_image_value_new (computed);
}
static gboolean
gtk_css_value_image_equal (const GtkCssValue *value1,
const GtkCssValue *value2)
{
return value1->image == value2->image;
}
static GtkCssValue *
gtk_css_value_image_transition (GtkCssValue *start,
GtkCssValue *end,
double progress)
{
GtkCssImage *fade;
fade = _gtk_css_image_cross_fade_new (_gtk_css_image_value_get_image (start),
_gtk_css_image_value_get_image (end),
progress);
return _gtk_css_image_value_new (fade);
}
static void
gtk_css_value_image_print (const GtkCssValue *value,
GString *string)
{
if (value->image)
_gtk_css_image_print (value->image, string);
else
g_string_append (string, "none");
}
static const GtkCssValueClass GTK_CSS_VALUE_IMAGE = {
gtk_css_value_image_free,
gtk_css_value_image_compute,
gtk_css_value_image_equal,
gtk_css_value_image_transition,
gtk_css_value_image_print
};
GtkCssValue *
_gtk_css_image_value_new (GtkCssImage *image)
{
static GtkCssValue none_singleton = { >K_CSS_VALUE_IMAGE, 1, NULL };
GtkCssValue *value;
if (image == NULL)
return _gtk_css_value_ref (&none_singleton);
value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_IMAGE);
value->image = image;
return value;
}
GtkCssImage *
_gtk_css_image_value_get_image (const GtkCssValue *value)
{
g_return_val_if_fail (value->class == >K_CSS_VALUE_IMAGE, NULL);
return value->image;
}
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