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1 /* | |
2 * Copyright (C) 2010 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 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 StylePendingImage_h | |
27 #define StylePendingImage_h | |
28 | |
29 #include "core/css/CSSCursorImageValue.h" | |
30 #include "core/css/CSSImageGeneratorValue.h" | |
31 #include "core/css/CSSImageSetValue.h" | |
32 #include "core/css/CSSImageValue.h" | |
33 #include "core/layout/style/StyleImage.h" | |
34 #include "platform/graphics/Image.h" | |
35 | |
36 namespace blink { | |
37 | |
38 // StylePendingImage is a placeholder StyleImage that is entered into the Comput
edStyle during | |
39 // style resolution, in order to avoid loading images that are not referenced by
the final style. | |
40 // They should never exist in a ComputedStyle after it has been returned from th
e style selector. | |
41 | |
42 class StylePendingImage final : public StyleImage { | |
43 public: | |
44 static PassRefPtr<StylePendingImage> create(CSSValue* value) { return adoptR
ef(new StylePendingImage(value)); } | |
45 | |
46 virtual WrappedImagePtr data() const override { return m_value; } | |
47 | |
48 virtual PassRefPtrWillBeRawPtr<CSSValue> cssValue() const override { return
m_value; } | |
49 CSSImageValue* cssImageValue() const { return m_value->isImageValue() ? toCS
SImageValue(m_value) : 0; } | |
50 CSSImageGeneratorValue* cssImageGeneratorValue() const { return m_value->isI
mageGeneratorValue() ? toCSSImageGeneratorValue(m_value) : 0; } | |
51 CSSCursorImageValue* cssCursorImageValue() const { return m_value->isCursorI
mageValue() ? toCSSCursorImageValue(m_value) : 0; } | |
52 CSSImageSetValue* cssImageSetValue() const { return m_value->isImageSetValue
() ? toCSSImageSetValue(m_value) : 0; } | |
53 | |
54 virtual LayoutSize imageSize(const LayoutObject*, float /*multiplier*/) cons
t override { return LayoutSize(); } | |
55 virtual bool imageHasRelativeWidth() const override { return false; } | |
56 virtual bool imageHasRelativeHeight() const override { return false; } | |
57 virtual void computeIntrinsicDimensions(const LayoutObject*, Length& /* intr
insicWidth */ , Length& /* intrinsicHeight */, FloatSize& /* intrinsicRatio */)
override { } | |
58 virtual bool usesImageContainerSize() const override { return false; } | |
59 virtual void setContainerSizeForLayoutObject(const LayoutObject*, const IntS
ize&, float) override { } | |
60 virtual void addClient(LayoutObject*) override { } | |
61 virtual void removeClient(LayoutObject*) override { } | |
62 virtual PassRefPtr<Image> image(LayoutObject*, const IntSize&) const overrid
e | |
63 { | |
64 ASSERT_NOT_REACHED(); | |
65 return nullptr; | |
66 } | |
67 virtual bool knownToBeOpaque(const LayoutObject*) const override { return fa
lse; } | |
68 | |
69 private: | |
70 StylePendingImage(CSSValue* value) | |
71 : m_value(value) | |
72 { | |
73 m_isPendingImage = true; | |
74 } | |
75 | |
76 CSSValue* m_value; // Not retained; it owns us. | |
77 }; | |
78 | |
79 DEFINE_STYLE_IMAGE_TYPE_CASTS(StylePendingImage, isPendingImage()); | |
80 | |
81 } | |
82 #endif | |
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