| /* |
| * Copyright (C) 2012 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. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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 StyleFetchedImageSet_h |
| #define StyleFetchedImageSet_h |
| |
| #include "core/loader/resource/ImageResourceObserver.h" |
| #include "core/style/StyleImage.h" |
| #include "platform/geometry/LayoutSize.h" |
| #include "platform/weborigin/KURL.h" |
| |
| namespace blink { |
| |
| class CSSImageSetValue; |
| |
| // This class keeps one cached image and has access to a set of alternatives. |
| |
| class StyleFetchedImageSet final : public StyleImage, |
| public ImageResourceObserver { |
| USING_PRE_FINALIZER(StyleFetchedImageSet, Dispose); |
| |
| public: |
| static StyleFetchedImageSet* Create(ImageResourceContent* image, |
| float image_scale_factor, |
| CSSImageSetValue* value, |
| const KURL& url) { |
| return new StyleFetchedImageSet(image, image_scale_factor, value, url); |
| } |
| ~StyleFetchedImageSet() override; |
| |
| CSSValue* CssValue() const override; |
| CSSValue* ComputedCSSValue() const override; |
| |
| // FIXME: This is used by StyleImage for equals comparison, but this |
| // implementation only looks at the image from the set that we have loaded. |
| // I'm not sure if that is meaningful enough or not. |
| WrappedImagePtr Data() const override; |
| |
| bool CanRender() const override; |
| bool IsLoaded() const override; |
| bool ErrorOccurred() const override; |
| LayoutSize ImageSize(const Document&, |
| float multiplier, |
| const LayoutSize& default_object_size) const override; |
| bool ImageHasRelativeSize() const override; |
| bool UsesImageContainerSize() const override; |
| void AddClient(LayoutObject*) override; |
| void RemoveClient(LayoutObject*) override; |
| PassRefPtr<Image> GetImage(const LayoutObject&, |
| const IntSize&) const override; |
| float ImageScaleFactor() const override { return image_scale_factor_; } |
| bool KnownToBeOpaque(const Document&, const ComputedStyle&) const override; |
| ImageResourceContent* CachedImage() const override; |
| |
| DECLARE_VIRTUAL_TRACE(); |
| |
| private: |
| StyleFetchedImageSet(ImageResourceContent*, |
| float image_scale_factor, |
| CSSImageSetValue*, |
| const KURL&); |
| |
| void Dispose(); |
| |
| String DebugName() const override { return "StyleFetchedImageSet"; } |
| |
| Member<ImageResourceContent> best_fit_image_; |
| float image_scale_factor_; |
| |
| Member<CSSImageSetValue> image_set_value_; // Not retained; it owns us. |
| const KURL url_; |
| }; |
| |
| DEFINE_STYLE_IMAGE_TYPE_CASTS(StyleFetchedImageSet, IsImageResourceSet()); |
| |
| } // namespace blink |
| |
| #endif // StyleFetchedImageSet_h |