1/*
2 * Copyright (C) Research In Motion Limited 2010. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB.  If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20#ifndef SVGResourcesCache_h
21#define SVGResourcesCache_h
22
23#include "RenderStyleConstants.h"
24#include <memory>
25#include <wtf/HashMap.h>
26#include <wtf/Noncopyable.h>
27
28namespace WebCore {
29
30class RenderElement;
31class RenderObject;
32class RenderStyle;
33class RenderSVGResourceContainer;
34class SVGResources;
35
36class SVGResourcesCache {
37    WTF_MAKE_NONCOPYABLE(SVGResourcesCache); WTF_MAKE_FAST_ALLOCATED;
38public:
39    SVGResourcesCache();
40    ~SVGResourcesCache();
41
42    static SVGResources* cachedResourcesForRenderObject(const RenderObject&);
43
44    // Called from all SVG renderers addChild() methods.
45    static void clientWasAddedToTree(RenderObject&);
46
47    // Called from all SVG renderers removeChild() methods.
48    static void clientWillBeRemovedFromTree(RenderObject&);
49
50    // Called from all SVG renderers destroy() methods - except for RenderSVGResourceContainer.
51    static void clientDestroyed(RenderElement&);
52
53    // Called from all SVG renderers layout() methods.
54    static void clientLayoutChanged(RenderElement&);
55
56    // Called from all SVG renderers styleDidChange() methods.
57    static void clientStyleChanged(RenderElement&, StyleDifference, const RenderStyle& newStyle);
58
59    // Called from RenderSVGResourceContainer::willBeDestroyed().
60    static void resourceDestroyed(RenderSVGResourceContainer&);
61
62private:
63    void addResourcesFromRenderer(RenderElement&, const RenderStyle&);
64    void removeResourcesFromRenderer(RenderElement&);
65
66    typedef HashMap<const RenderObject*, std::unique_ptr<SVGResources>> CacheMap;
67    CacheMap m_cache;
68};
69
70}
71
72#endif
73