1/*
2 * Copyright (C) 2012 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. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "CSSValueList.h"
29#include "CachedResourceHandle.h"
30#include "ResourceLoaderOptions.h"
31#include <wtf/Function.h>
32
33namespace WebCore {
34
35class CachedImage;
36class CachedResourceLoader;
37class Document;
38
39class CSSImageSetValue final : public CSSValueList {
40public:
41 static Ref<CSSImageSetValue> create(LoadedFromOpaqueSource loadedFromOpaqueSource)
42 {
43 return adoptRef(*new CSSImageSetValue(loadedFromOpaqueSource));
44 }
45 ~CSSImageSetValue();
46
47 std::pair<CachedImage*, float> loadBestFitImage(CachedResourceLoader&, const ResourceLoaderOptions&);
48 CachedImage* cachedImage() const { return m_cachedImage.get(); }
49
50 String customCSSText() const;
51
52 struct ImageWithScale {
53 URL imageURL;
54 float scaleFactor;
55 };
56
57 bool traverseSubresources(const WTF::Function<bool (const CachedResource&)>& handler) const;
58
59 void updateDeviceScaleFactor(const Document&);
60
61 URL bestImageForScaleFactorURL() { return bestImageForScaleFactor().imageURL; }
62
63protected:
64 ImageWithScale bestImageForScaleFactor();
65
66private:
67 explicit CSSImageSetValue(LoadedFromOpaqueSource);
68
69 void fillImageSet();
70 static inline bool compareByScaleFactor(ImageWithScale first, ImageWithScale second) { return first.scaleFactor < second.scaleFactor; }
71
72 CachedResourceHandle<CachedImage> m_cachedImage;
73 bool m_accessedBestFitImage { false };
74 float m_bestFitImageScaleFactor { 1 };
75 float m_deviceScaleFactor { 1 };
76
77 Vector<ImageWithScale> m_imagesInSet;
78 LoadedFromOpaqueSource m_loadedFromOpaqueSource { LoadedFromOpaqueSource::No };
79};
80
81} // namespace WebCore
82
83SPECIALIZE_TYPE_TRAITS_CSS_VALUE(CSSImageSetValue, isImageSetValue())
84