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/* GTK - The GIMP Toolkit
* Copyright (C) 2014 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 "gtkcssunsetvalueprivate.h"
#include "gtkcssinheritvalueprivate.h"
#include "gtkcssinitialvalueprivate.h"
#include "gtkcssstylepropertyprivate.h"
struct _GtkCssValue {
GTK_CSS_VALUE_BASE
};
static void G_GNUC_NORETURN
gtk_css_value_unset_free (GtkCssValue *value)
{
/* Can only happen if the unique value gets unreffed too often */
g_assert_not_reached ();
}
static GtkCssValue *
gtk_css_value_unset_compute (GtkCssValue *value,
guint property_id,
GtkStyleProvider *provider,
GtkCssStyle *style,
GtkCssStyle *parent_style)
{
GtkCssStyleProperty *property;
GtkCssValue *unset_value;
property = _gtk_css_style_property_lookup_by_id (property_id);
if (_gtk_css_style_property_is_inherit (property))
unset_value = _gtk_css_inherit_value_get ();
else
unset_value = _gtk_css_initial_value_get ();
return _gtk_css_value_compute (unset_value,
property_id,
provider,
style,
parent_style);
}
static gboolean
gtk_css_value_unset_equal (const GtkCssValue *value1,
const GtkCssValue *value2)
{
return TRUE;
}
static GtkCssValue *
gtk_css_value_unset_transition (GtkCssValue *start,
GtkCssValue *end,
guint property_id,
double progress)
{
return NULL;
}
static void
gtk_css_value_unset_print (const GtkCssValue *value,
GString *string)
{
g_string_append (string, "unset");
}
static const GtkCssValueClass GTK_CSS_VALUE_UNSET = {
"GtkCssUnsetValue",
gtk_css_value_unset_free,
gtk_css_value_unset_compute,
gtk_css_value_unset_equal,
gtk_css_value_unset_transition,
NULL,
NULL,
gtk_css_value_unset_print
};
static GtkCssValue unset = { >K_CSS_VALUE_UNSET, 1 };
GtkCssValue *
_gtk_css_unset_value_new (void)
{
return _gtk_css_value_ref (&unset);
}
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