6e6cbd7316
We don't need to compare all their CSS values to figure out that nothing changed. We know that.
113 lines
3.1 KiB
C
113 lines
3.1 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2015 Benjamin Otte <otte@gnome.org>
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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 "gtkcssstylechangeprivate.h"
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#include "gtkcssstylepropertyprivate.h"
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void
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gtk_css_style_change_init (GtkCssStyleChange *change,
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GtkCssStyle *old_style,
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GtkCssStyle *new_style)
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{
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change->old_style = g_object_ref (old_style);
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change->new_style = g_object_ref (new_style);
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change->n_compared = 0;
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change->affects = 0;
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change->changes = _gtk_bitmask_new ();
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/* Make sure we don't do extra work if old and new are equal. */
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if (old_style == new_style)
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change->n_compared = GTK_CSS_PROPERTY_N_PROPERTIES;
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}
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void
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gtk_css_style_change_finish (GtkCssStyleChange *change)
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{
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g_object_unref (change->old_style);
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g_object_unref (change->new_style);
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_gtk_bitmask_free (change->changes);
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}
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GtkCssStyle *
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gtk_css_style_change_get_old_style (GtkCssStyleChange *change)
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{
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return change->old_style;
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}
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GtkCssStyle *
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gtk_css_style_change_get_new_style (GtkCssStyleChange *change)
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{
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return change->new_style;
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}
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static gboolean
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gtk_css_style_compare_next_value (GtkCssStyleChange *change)
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{
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if (change->n_compared == GTK_CSS_PROPERTY_N_PROPERTIES)
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return FALSE;
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if (!_gtk_css_value_equal (gtk_css_style_get_value (change->old_style, change->n_compared),
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gtk_css_style_get_value (change->new_style, change->n_compared)))
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{
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change->affects |= _gtk_css_style_property_get_affects (_gtk_css_style_property_lookup_by_id (change->n_compared));
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change->changes = _gtk_bitmask_set (change->changes, change->n_compared, TRUE);
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}
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change->n_compared++;
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return TRUE;
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}
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gboolean
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gtk_css_style_change_has_change (GtkCssStyleChange *change)
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{
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do {
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if (!_gtk_bitmask_is_empty (change->changes))
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return TRUE;
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} while (gtk_css_style_compare_next_value (change));
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return FALSE;
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}
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gboolean
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gtk_css_style_change_affects (GtkCssStyleChange *change,
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GtkCssAffects affects)
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{
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do {
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if (change->affects & affects)
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return TRUE;
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} while (gtk_css_style_compare_next_value (change));
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return FALSE;
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}
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gboolean
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gtk_css_style_change_changes_property (GtkCssStyleChange *change,
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guint id)
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{
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while (change->n_compared <= id)
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gtk_css_style_compare_next_value (change);
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return _gtk_bitmask_get (change->changes, id);
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}
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