forked from AuroraMiddleware/gtk
122 lines
3.2 KiB
C
122 lines
3.2 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2011 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gtkcssimagevalueprivate.h"
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#include "gtkcssimagecrossfadeprivate.h"
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struct _GtkCssValue {
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GTK_CSS_VALUE_BASE
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GtkCssImage *image;
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};
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static void
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gtk_css_value_image_free (GtkCssValue *value)
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{
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g_object_unref (value->image);
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g_slice_free (GtkCssValue, value);
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}
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static GtkCssValue *
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gtk_css_value_image_compute (GtkCssValue *value,
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guint property_id,
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GtkStyleContext *context,
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GtkCssDependencies *dependencies)
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{
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GtkCssImage *image, *computed;
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image = _gtk_css_image_value_get_image (value);
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if (image == NULL)
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return _gtk_css_value_ref (value);
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computed = _gtk_css_image_compute (image, property_id, context, dependencies);
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if (computed == image)
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{
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g_object_unref (computed);
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return _gtk_css_value_ref (value);
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}
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return _gtk_css_image_value_new (computed);
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}
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static gboolean
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gtk_css_value_image_equal (const GtkCssValue *value1,
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const GtkCssValue *value2)
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{
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return value1->image == value2->image;
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}
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static GtkCssValue *
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gtk_css_value_image_transition (GtkCssValue *start,
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GtkCssValue *end,
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double progress)
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{
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GtkCssImage *fade;
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fade = _gtk_css_image_cross_fade_new (_gtk_css_image_value_get_image (start),
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_gtk_css_image_value_get_image (end),
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progress);
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return _gtk_css_image_value_new (fade);
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}
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static void
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gtk_css_value_image_print (const GtkCssValue *value,
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GString *string)
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{
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if (value->image)
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_gtk_css_image_print (value->image, string);
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else
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g_string_append (string, "none");
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}
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static const GtkCssValueClass GTK_CSS_VALUE_IMAGE = {
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gtk_css_value_image_free,
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gtk_css_value_image_compute,
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gtk_css_value_image_equal,
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gtk_css_value_image_transition,
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gtk_css_value_image_print
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};
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GtkCssValue *
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_gtk_css_image_value_new (GtkCssImage *image)
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{
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static GtkCssValue none_singleton = { >K_CSS_VALUE_IMAGE, 1, NULL };
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GtkCssValue *value;
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if (image == NULL)
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return _gtk_css_value_ref (&none_singleton);
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value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_IMAGE);
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value->image = image;
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return value;
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}
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GtkCssImage *
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_gtk_css_image_value_get_image (const GtkCssValue *value)
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{
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g_return_val_if_fail (value->class == >K_CSS_VALUE_IMAGE, NULL);
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return value->image;
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}
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