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/* GTK - The GIMP Toolkit
* Copyright (C) 2015 Benjamin Otte <otte@gnome.org>
*
* 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 "gtkcssstylechangeprivate.h"
#include "gtkcssstylepropertyprivate.h"
void
gtk_css_style_change_init (GtkCssStyleChange *change,
GtkCssStyle *old_style,
GtkCssStyle *new_style)
{
change->old_style = g_object_ref (old_style);
change->new_style = g_object_ref (new_style);
change->n_compared = 0;
change->affects = 0;
change->changes = _gtk_bitmask_new ();
/* Make sure we don't do extra work if old and new are equal. */
if (old_style == new_style)
change->n_compared = GTK_CSS_PROPERTY_N_PROPERTIES;
}
void
gtk_css_style_change_finish (GtkCssStyleChange *change)
{
g_object_unref (change->old_style);
g_object_unref (change->new_style);
_gtk_bitmask_free (change->changes);
}
GtkCssStyle *
gtk_css_style_change_get_old_style (GtkCssStyleChange *change)
{
return change->old_style;
}
GtkCssStyle *
gtk_css_style_change_get_new_style (GtkCssStyleChange *change)
{
return change->new_style;
}
static gboolean
gtk_css_style_compare_next_value (GtkCssStyleChange *change)
{
if (change->n_compared == GTK_CSS_PROPERTY_N_PROPERTIES)
return FALSE;
if (!_gtk_css_value_equal (gtk_css_style_get_value (change->old_style, change->n_compared),
gtk_css_style_get_value (change->new_style, change->n_compared)))
{
change->affects |= _gtk_css_style_property_get_affects (_gtk_css_style_property_lookup_by_id (change->n_compared));
change->changes = _gtk_bitmask_set (change->changes, change->n_compared, TRUE);
}
change->n_compared++;
return TRUE;
}
gboolean
gtk_css_style_change_has_change (GtkCssStyleChange *change)
{
do {
if (!_gtk_bitmask_is_empty (change->changes))
return TRUE;
} while (gtk_css_style_compare_next_value (change));
return FALSE;
}
gboolean
gtk_css_style_change_affects (GtkCssStyleChange *change,
GtkCssAffects affects)
{
do {
if (change->affects & affects)
return TRUE;
} while (gtk_css_style_compare_next_value (change));
return FALSE;
}
gboolean
gtk_css_style_change_changes_property (GtkCssStyleChange *change,
guint id)
{
while (change->n_compared <= id)
gtk_css_style_compare_next_value (change);
return _gtk_bitmask_get (change->changes, id);
}
void
gtk_css_style_change_print (GtkCssStyleChange *change,
GString *string)
{
int i;
GtkCssStyle *old = gtk_css_style_change_get_old_style (change);
GtkCssStyle *new = gtk_css_style_change_get_new_style (change);
for (i = 0; i < GTK_CSS_PROPERTY_N_PROPERTIES; i ++)
{
if (gtk_css_style_change_changes_property (change, i))
{
GtkCssStyleProperty *prop;
GtkCssValue *value;
const char *name;
prop = _gtk_css_style_property_lookup_by_id (i);
name = _gtk_style_property_get_name (GTK_STYLE_PROPERTY (prop));
value = gtk_css_style_get_value (old, i);
_gtk_css_value_print (value, string);
g_string_append_printf (string, "%s: ", name);
_gtk_css_value_print (value, string);
g_string_append (string, "\n");
g_string_append_printf (string, "%s: ", name);
value = gtk_css_style_get_value (new, i);
_gtk_css_value_print (value, string);
g_string_append (string, "\n");
}
}
}
char *
gtk_css_style_change_to_string (GtkCssStyleChange *change)
{
GString *string = g_string_new ("");
gtk_css_style_change_print (change, string);
return g_string_free (string, FALSE);
}
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