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| 1 /* | |
| 2 * Copyright (C) 2008 Apple Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * 1. Redistributions of source code must retain the above copyright | |
| 8 * notice, this list of conditions and the following disclaimer. | |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer in the | |
| 11 * documentation and/or other materials provided with the distribution. | |
| 12 * | |
| 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY | |
| 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | |
| 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 */ | |
| 25 | |
| 26 #ifndef SKY_ENGINE_CORE_CSS_CSSCANVASVALUE_H_ | |
| 27 #define SKY_ENGINE_CORE_CSS_CSSCANVASVALUE_H_ | |
| 28 | |
| 29 #include "sky/engine/core/css/CSSImageGeneratorValue.h" | |
| 30 #include "sky/engine/core/html/HTMLCanvasElement.h" | |
| 31 | |
| 32 namespace blink { | |
| 33 | |
| 34 class Document; | |
| 35 | |
| 36 class CSSCanvasValue : public CSSImageGeneratorValue { | |
| 37 public: | |
| 38 static PassRefPtr<CSSCanvasValue> create(const String& name) | |
| 39 { | |
| 40 return adoptRef(new CSSCanvasValue(name)); | |
| 41 } | |
| 42 ~CSSCanvasValue(); | |
| 43 | |
| 44 String customCSSText() const; | |
| 45 | |
| 46 PassRefPtr<Image> image(RenderObject*, const IntSize&); | |
| 47 bool isFixedSize() const { return true; } | |
| 48 IntSize fixedSize(const RenderObject*); | |
| 49 | |
| 50 bool isPending() const { return false; } | |
| 51 void loadSubimages(ResourceFetcher*) { } | |
| 52 | |
| 53 bool equals(const CSSCanvasValue&) const; | |
| 54 | |
| 55 private: | |
| 56 explicit CSSCanvasValue(const String& name) | |
| 57 : CSSImageGeneratorValue(CanvasClass) | |
| 58 , m_canvasObserver(adoptPtr(new CanvasObserverProxy(this))) | |
| 59 , m_name(name) | |
| 60 , m_element(nullptr) | |
| 61 { | |
| 62 } | |
| 63 | |
| 64 // NOTE: We put the CanvasObserver in a member instead of inheriting from it | |
| 65 // to avoid adding a vptr to CSSCanvasValue. | |
| 66 class CanvasObserverProxy final : public CanvasObserver { | |
| 67 public: | |
| 68 explicit CanvasObserverProxy(CSSCanvasValue* ownerValue) : m_ownerValue(
ownerValue) { } | |
| 69 | |
| 70 virtual void canvasChanged(HTMLCanvasElement* canvas, const FloatRect& c
hangedRect) override | |
| 71 { | |
| 72 m_ownerValue->canvasChanged(canvas, changedRect); | |
| 73 } | |
| 74 virtual void canvasResized(HTMLCanvasElement* canvas) override | |
| 75 { | |
| 76 m_ownerValue->canvasResized(canvas); | |
| 77 } | |
| 78 #if !ENABLE(OILPAN) | |
| 79 virtual void canvasDestroyed(HTMLCanvasElement* canvas) override | |
| 80 { | |
| 81 m_ownerValue->canvasDestroyed(canvas); | |
| 82 } | |
| 83 #endif | |
| 84 | |
| 85 private: | |
| 86 RawPtr<CSSCanvasValue> m_ownerValue; | |
| 87 }; | |
| 88 | |
| 89 void canvasChanged(HTMLCanvasElement*, const FloatRect& changedRect); | |
| 90 void canvasResized(HTMLCanvasElement*); | |
| 91 | |
| 92 #if !ENABLE(OILPAN) | |
| 93 void canvasDestroyed(HTMLCanvasElement*); | |
| 94 #endif | |
| 95 | |
| 96 HTMLCanvasElement* element(Document*); | |
| 97 | |
| 98 OwnPtr<CanvasObserverProxy> m_canvasObserver; | |
| 99 | |
| 100 // The name of the canvas. | |
| 101 String m_name; | |
| 102 // The document supplies the element and owns it. | |
| 103 RawPtr<HTMLCanvasElement> m_element; | |
| 104 }; | |
| 105 | |
| 106 DEFINE_CSS_VALUE_TYPE_CASTS(CSSCanvasValue, isCanvasValue()); | |
| 107 | |
| 108 } // namespace blink | |
| 109 | |
| 110 #endif // SKY_ENGINE_CORE_CSS_CSSCANVASVALUE_H_ | |
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