| /* |
| * 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 THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_STYLE_PENDING_IMAGE_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_STYLE_PENDING_IMAGE_H_ |
| |
| #include "third_party/blink/renderer/core/css/css_image_generator_value.h" |
| #include "third_party/blink/renderer/core/css/css_image_set_value.h" |
| #include "third_party/blink/renderer/core/css/css_image_value.h" |
| #include "third_party/blink/renderer/core/css/css_paint_value.h" |
| #include "third_party/blink/renderer/core/style/style_image.h" |
| #include "third_party/blink/renderer/platform/graphics/image.h" |
| #include "third_party/blink/renderer/platform/wtf/casting.h" |
| |
| namespace blink { |
| |
| class ImageResourceObserver; |
| |
| // 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: |
| explicit StylePendingImage(const CSSValue& value) |
| : value_(const_cast<CSSValue*>(&value)) { |
| is_pending_image_ = true; |
| } |
| |
| WrappedImagePtr Data() const override { return value_.Get(); } |
| |
| CSSValue* CssValue() const override { return value_; } |
| |
| CSSValue* ComputedCSSValue(const ComputedStyle&, |
| bool allow_visited_style) const override { |
| NOTREACHED(); |
| return nullptr; |
| } |
| |
| CSSImageValue* CssImageValue() const { |
| return DynamicTo<CSSImageValue>(value_.Get()); |
| } |
| CSSPaintValue* CssPaintValue() const { |
| return DynamicTo<CSSPaintValue>(value_.Get()); |
| } |
| CSSImageGeneratorValue* CssImageGeneratorValue() const { |
| return DynamicTo<CSSImageGeneratorValue>(value_.Get()); |
| } |
| CSSImageSetValue* CssImageSetValue() const { |
| return DynamicTo<CSSImageSetValue>(value_.Get()); |
| } |
| |
| FloatSize ImageSize(const Document&, |
| float /*multiplier*/, |
| const LayoutSize& /*defaultObjectSize*/, |
| RespectImageOrientationEnum) const override { |
| return FloatSize(); |
| } |
| bool HasIntrinsicSize() const override { return true; } |
| void AddClient(ImageResourceObserver*) override {} |
| void RemoveClient(ImageResourceObserver*) override {} |
| scoped_refptr<Image> GetImage(const ImageResourceObserver&, |
| const Document&, |
| const ComputedStyle&, |
| const FloatSize& target_size) const override { |
| NOTREACHED(); |
| return nullptr; |
| } |
| bool KnownToBeOpaque(const Document&, const ComputedStyle&) const override { |
| return false; |
| } |
| |
| void Trace(Visitor* visitor) override { |
| visitor->Trace(value_); |
| StyleImage::Trace(visitor); |
| } |
| |
| private: |
| bool IsEqual(const StyleImage& other) const override; |
| |
| // TODO(sashab): Replace this with <const CSSValue> once Member<> |
| // supports const types. |
| Member<CSSValue> value_; |
| }; |
| |
| template <> |
| struct DowncastTraits<StylePendingImage> { |
| static bool AllowFrom(const StyleImage& styleImage) { |
| return styleImage.IsPendingImage(); |
| } |
| }; |
| |
| inline bool StylePendingImage::IsEqual(const StyleImage& other) const { |
| if (!other.IsPendingImage()) |
| return false; |
| const auto& other_pending = To<StylePendingImage>(other); |
| return value_ == other_pending.value_; |
| } |
| |
| } // namespace blink |
| #endif |