gtk2/gtk/gtkcssinheritvalue.c
Benjamin Otte ffe50c3b67 cssvalue: Add _gtk_css_value_equal()
For now, we return FALSE for all default css values, so this is not very
useful.

I also think of this as an optimization equal, not a guaranteed equal,
because we don't even have a notion of what "equal" means.

For example, for background-repeat, "repeat, repeat" and "repeat"
are functionally equivalent. But the cssvalue has no idea that it's used
for background-repeat.
As a more complicated example, "repeat, no-repeat" and "repeat" are
equal to what one sees as long as there's only one image listed
background-image-source. But once you start transition'ing to an image
with 2 sources, it's different...
2012-04-17 08:59:12 +02:00

68 lines
1.7 KiB
C

/* 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 "gtkcssinheritvalueprivate.h"
struct _GtkCssValue {
GTK_CSS_VALUE_BASE
};
static void
gtk_css_value_inherit_free (GtkCssValue *value)
{
/* Can only happen if the unique value gets unreffed too often */
g_assert_not_reached ();
}
static gboolean
gtk_css_value_inherit_equal (const GtkCssValue *value1,
const GtkCssValue *value2)
{
return TRUE;
}
static void
gtk_css_value_inherit_print (const GtkCssValue *value,
GString *string)
{
g_string_append (string, "inherit");
}
static const GtkCssValueClass GTK_CSS_VALUE_INHERIT = {
gtk_css_value_inherit_free,
gtk_css_value_inherit_equal,
gtk_css_value_inherit_print
};
static GtkCssValue inherit = { &GTK_CSS_VALUE_INHERIT, 1 };
GtkCssValue *
_gtk_css_inherit_value_new (void)
{
return _gtk_css_value_ref (&inherit);
}
gboolean
_gtk_css_value_is_inherit (const GtkCssValue *value)
{
g_return_val_if_fail (value != NULL, FALSE);
return value == &inherit;
}