| /* |
| * Copyright (C) 2010 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef StylePendingImage_h |
| #define StylePendingImage_h |
| |
| #include "core/css/CSSCursorImageValue.h" |
| #include "core/css/CSSImageGeneratorValue.h" |
| #include "core/css/CSSImageSetValue.h" |
| #include "core/css/CSSImageValue.h" |
| #include "core/css/CSSPaintValue.h" |
| #include "core/style/StyleImage.h" |
| #include "platform/graphics/Image.h" |
| |
| namespace blink { |
| |
| // StylePendingImage is a placeholder StyleImage that is entered into the |
| // ComputedStyle during style resolution, in order to avoid loading images that |
| // are not referenced by the final style. They should never exist in a |
| // ComputedStyle after it has been returned from the style selector. |
| |
| class StylePendingImage final : public StyleImage { |
| public: |
| static StylePendingImage* create(const CSSValue& value) { |
| return new StylePendingImage(value); |
| } |
| |
| WrappedImagePtr data() const override { return m_value.get(); } |
| |
| CSSValue* cssValue() const override { return m_value; } |
| |
| CSSValue* computedCSSValue() const override { |
| ASSERT_NOT_REACHED(); |
| return nullptr; |
| } |
| |
| CSSImageValue* cssImageValue() const { |
| return m_value->isImageValue() ? toCSSImageValue(m_value.get()) : 0; |
| } |
| CSSPaintValue* cssPaintValue() const { |
| return m_value->isPaintValue() ? toCSSPaintValue(m_value.get()) : 0; |
| } |
| CSSImageGeneratorValue* cssImageGeneratorValue() const { |
| return m_value->isImageGeneratorValue() |
| ? toCSSImageGeneratorValue(m_value.get()) |
| : 0; |
| } |
| CSSCursorImageValue* cssCursorImageValue() const { |
| return m_value->isCursorImageValue() ? toCSSCursorImageValue(m_value.get()) |
| : 0; |
| } |
| CSSImageSetValue* cssImageSetValue() const { |
| return m_value->isImageSetValue() ? toCSSImageSetValue(m_value.get()) : 0; |
| } |
| |
| LayoutSize imageSize(const LayoutObject&, |
| float /*multiplier*/, |
| const LayoutSize& /*defaultObjectSize*/) const override { |
| return LayoutSize(); |
| } |
| bool imageHasRelativeSize() const override { return false; } |
| bool usesImageContainerSize() const override { return false; } |
| void addClient(LayoutObject*) override {} |
| void removeClient(LayoutObject*) override {} |
| PassRefPtr<Image> image(const LayoutObject&, |
| const IntSize&, |
| float) const override { |
| ASSERT_NOT_REACHED(); |
| return nullptr; |
| } |
| bool knownToBeOpaque(const LayoutObject&) const override { return false; } |
| |
| DEFINE_INLINE_VIRTUAL_TRACE() { |
| visitor->trace(m_value); |
| StyleImage::trace(visitor); |
| } |
| |
| private: |
| explicit StylePendingImage(const CSSValue& value) |
| : m_value(const_cast<CSSValue*>(&value)) { |
| m_isPendingImage = true; |
| } |
| |
| // TODO(sashab): Replace this with <const CSSValue> once Member<> |
| // supports const types. |
| Member<CSSValue> m_value; |
| }; |
| |
| DEFINE_STYLE_IMAGE_TYPE_CASTS(StylePendingImage, isPendingImage()); |
| |
| } // namespace blink |
| #endif |