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 "core/rendering/style/StyleDifference.h"
24#include "wtf/FastAllocBase.h"
25#include "wtf/HashMap.h"
26#include "wtf/Noncopyable.h"
27#include "wtf/OwnPtr.h"
28
29namespace blink {
30
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*, const RenderStyle* newStyle);
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(RenderObject*);
52
53    // Called from all SVG renderers layout() methods.
54    static void clientLayoutChanged(RenderObject*);
55
56    // Called from all SVG renderers styleDidChange() methods.
57    static void clientStyleChanged(RenderObject*, StyleDifference, const RenderStyle* newStyle);
58
59    // Called from RenderSVGResourceContainer::willBeDestroyed().
60    static void resourceDestroyed(RenderSVGResourceContainer*);
61
62private:
63    void addResourcesFromRenderObject(RenderObject*, const RenderStyle*);
64    void removeResourcesFromRenderObject(RenderObject*);
65
66    typedef HashMap<const RenderObject*, OwnPtr<SVGResources> > CacheMap;
67    CacheMap m_cache;
68};
69
70}
71
72#endif
73