1/*
2 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
3 * (C) 2000 Antti Koivisto (koivisto@kde.org)
4 * (C) 2000 Dirk Mueller (mueller@kde.org)
5 * Copyright (C) 2003, 2005-2008, 2016 Apple Inc. All rights reserved.
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
16 *
17 * You should have received a copy of the GNU Library General Public License
18 * along with this library; see the file COPYING.LIB. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
21 *
22 */
23
24#include "config.h"
25#include "StyleCachedImage.h"
26
27#include "CSSCursorImageValue.h"
28#include "CSSImageSetValue.h"
29#include "CSSImageValue.h"
30#include "CachedImage.h"
31#include "RenderElement.h"
32#include "RenderView.h"
33
34namespace WebCore {
35
36StyleCachedImage::StyleCachedImage(CSSValue& cssValue)
37 : m_cssValue(cssValue)
38{
39 ASSERT(is<CSSImageValue>(m_cssValue) || is<CSSImageSetValue>(m_cssValue) || is<CSSCursorImageValue>(m_cssValue));
40
41 m_isCachedImage = true;
42
43 // CSSImageValue doesn't get invalidated so we can grab the CachedImage immediately if it exists.
44 if (is<CSSImageValue>(m_cssValue)) {
45 m_cachedImage = downcast<CSSImageValue>(m_cssValue.get()).cachedImage();
46 if (m_cachedImage)
47 m_isPending = false;
48 }
49}
50
51StyleCachedImage::~StyleCachedImage() = default;
52
53bool StyleCachedImage::operator==(const StyleImage& other) const
54{
55 if (!is<StyleCachedImage>(other))
56 return false;
57 auto& otherCached = downcast<StyleCachedImage>(other);
58 if (&otherCached == this)
59 return true;
60 if (m_scaleFactor != otherCached.m_scaleFactor)
61 return false;
62 if (m_cssValue.ptr() == otherCached.m_cssValue.ptr())
63 return true;
64 if (m_cachedImage && m_cachedImage == otherCached.m_cachedImage)
65 return true;
66 return false;
67}
68
69URL StyleCachedImage::imageURL()
70{
71 if (is<CSSImageValue>(m_cssValue))
72 return downcast<CSSImageValue>(m_cssValue.get()).url();
73
74 if (is<CSSImageSetValue>(m_cssValue))
75 return downcast<CSSImageSetValue>(m_cssValue.get()).bestImageForScaleFactorURL();
76
77 if (is<CSSCursorImageValue>(m_cssValue.get()))
78 return downcast<CSSCursorImageValue>(m_cssValue.get()).imageURL();
79
80 ASSERT_NOT_REACHED();
81 return { };
82}
83
84void StyleCachedImage::load(CachedResourceLoader& loader, const ResourceLoaderOptions& options)
85{
86 ASSERT(m_isPending);
87 m_isPending = false;
88
89 if (is<CSSImageValue>(m_cssValue)) {
90 auto& imageValue = downcast<CSSImageValue>(m_cssValue.get());
91 m_cachedImage = imageValue.loadImage(loader, options);
92 return;
93 }
94
95 if (is<CSSImageSetValue>(m_cssValue)) {
96 auto& imageSetValue = downcast<CSSImageSetValue>(m_cssValue.get());
97 std::tie(m_cachedImage, m_scaleFactor) = imageSetValue.loadBestFitImage(loader, options);
98 return;
99 }
100
101 if (is<CSSCursorImageValue>(m_cssValue.get())) {
102 auto& cursorValue = downcast<CSSCursorImageValue>(m_cssValue.get());
103 std::tie(m_cachedImage, m_scaleFactor) = cursorValue.loadImage(loader, options);
104 return;
105 }
106}
107
108CachedImage* StyleCachedImage::cachedImage() const
109{
110 return m_cachedImage.get();
111}
112
113Ref<CSSValue> StyleCachedImage::cssValue() const
114{
115 return m_cssValue.copyRef();
116}
117
118bool StyleCachedImage::canRender(const RenderElement* renderer, float multiplier) const
119{
120 if (!m_cachedImage)
121 return false;
122 return m_cachedImage->canRender(renderer, multiplier);
123}
124
125bool StyleCachedImage::isPending() const
126{
127 return m_isPending;
128}
129
130bool StyleCachedImage::isLoaded() const
131{
132 if (!m_cachedImage)
133 return false;
134 return m_cachedImage->isLoaded();
135}
136
137bool StyleCachedImage::errorOccurred() const
138{
139 if (!m_cachedImage)
140 return false;
141 return m_cachedImage->errorOccurred();
142}
143
144FloatSize StyleCachedImage::imageSize(const RenderElement* renderer, float multiplier) const
145{
146 if (!m_cachedImage)
147 return { };
148 FloatSize size = m_cachedImage->imageSizeForRenderer(renderer, multiplier);
149 size.scale(1 / m_scaleFactor);
150 return size;
151}
152
153bool StyleCachedImage::imageHasRelativeWidth() const
154{
155 if (!m_cachedImage)
156 return false;
157 return m_cachedImage->imageHasRelativeWidth();
158}
159
160bool StyleCachedImage::imageHasRelativeHeight() const
161{
162 if (!m_cachedImage)
163 return false;
164 return m_cachedImage->imageHasRelativeHeight();
165}
166
167void StyleCachedImage::computeIntrinsicDimensions(const RenderElement*, Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio)
168{
169 if (!m_cachedImage)
170 return;
171 m_cachedImage->computeIntrinsicDimensions(intrinsicWidth, intrinsicHeight, intrinsicRatio);
172}
173
174bool StyleCachedImage::usesImageContainerSize() const
175{
176 if (!m_cachedImage)
177 return false;
178 return m_cachedImage->usesImageContainerSize();
179}
180
181void StyleCachedImage::setContainerContextForRenderer(const RenderElement& renderer, const FloatSize& containerSize, float containerZoom)
182{
183 if (!m_cachedImage)
184 return;
185 m_cachedImage->setContainerContextForClient(renderer, LayoutSize(containerSize), containerZoom, imageURL());
186}
187
188void StyleCachedImage::addClient(RenderElement* renderer)
189{
190 ASSERT(!m_isPending);
191 if (!m_cachedImage)
192 return;
193 ASSERT(renderer);
194 m_cachedImage->addClient(*renderer);
195}
196
197void StyleCachedImage::removeClient(RenderElement* renderer)
198{
199 ASSERT(!m_isPending);
200 if (!m_cachedImage)
201 return;
202 ASSERT(renderer);
203
204 m_cachedImage->removeClient(*renderer);
205}
206
207RefPtr<Image> StyleCachedImage::image(RenderElement* renderer, const FloatSize&) const
208{
209 ASSERT(!m_isPending);
210 if (!m_cachedImage)
211 return nullptr;
212 return m_cachedImage->imageForRenderer(renderer);
213}
214
215float StyleCachedImage::imageScaleFactor() const
216{
217 return m_scaleFactor;
218}
219
220bool StyleCachedImage::knownToBeOpaque(const RenderElement* renderer) const
221{
222 if (!m_cachedImage)
223 return false;
224 return m_cachedImage->currentFrameKnownToBeOpaque(renderer);
225}
226
227}
228