forked from AuroraMiddleware/gtk
170130f1d9
Add a fast path for parent selector matching that uses a bloom filter to quickly discard selectors that can't possibly match. Keep in mind that we match using a bloom filter, so we might accidentally include too many selectors when hash/bucket collisions occur. That's not a correctness problem though, because we'll do a real check afterwards. The idea for this change is taken from browsers, in particular WebKit.
64 lines
2.1 KiB
C
64 lines
2.1 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2014 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 "gtkcsstransientnodeprivate.h"
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#include "gtkprivate.h"
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G_DEFINE_TYPE (GtkCssTransientNode, gtk_css_transient_node, GTK_TYPE_CSS_NODE)
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static GtkCssStyle *
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gtk_css_transient_node_update_style (GtkCssNode *cssnode,
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const GtkCountingBloomFilter *filter,
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GtkCssChange change,
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gint64 timestamp,
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GtkCssStyle *style)
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{
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/* This should get rid of animations */
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return GTK_CSS_NODE_CLASS (gtk_css_transient_node_parent_class)->update_style (cssnode, filter, change, 0, style);
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}
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static void
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gtk_css_transient_node_class_init (GtkCssTransientNodeClass *klass)
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{
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GtkCssNodeClass *node_class = GTK_CSS_NODE_CLASS (klass);
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node_class->update_style = gtk_css_transient_node_update_style;
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}
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static void
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gtk_css_transient_node_init (GtkCssTransientNode *cssnode)
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{
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gtk_css_node_set_visible (GTK_CSS_NODE (cssnode), FALSE);
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}
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GtkCssNode *
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gtk_css_transient_node_new (GtkCssNode *parent)
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{
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GtkCssNode *result;
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gtk_internal_return_val_if_fail (GTK_IS_CSS_NODE (parent), NULL);
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result = g_object_new (GTK_TYPE_CSS_TRANSIENT_NODE, NULL);
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gtk_css_node_declaration_unref (result->decl);
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result->decl = gtk_css_node_declaration_ref (parent->decl);
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return result;
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}
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