1/*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
4 * Copyright (C) 2013 Google Inc. All rights reserved.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public License
17 * along with this library; see the file COPYING.LIB.  If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 *
21 */
22
23#include "config.h"
24#include "core/css/resolver/StyleResourceLoader.h"
25
26#include "core/CSSPropertyNames.h"
27#include "core/css/CSSCursorImageValue.h"
28#include "core/css/CSSImageValue.h"
29#include "core/css/CSSSVGDocumentValue.h"
30#include "core/css/resolver/ElementStyleResources.h"
31#include "core/fetch/ResourceFetcher.h"
32#include "core/rendering/style/ContentData.h"
33#include "core/rendering/style/FillLayer.h"
34#include "core/rendering/style/RenderStyle.h"
35#include "core/rendering/style/StyleFetchedImage.h"
36#include "core/rendering/style/StyleFetchedImageSet.h"
37#include "core/rendering/style/StyleGeneratedImage.h"
38#include "core/rendering/style/StylePendingImage.h"
39#include "core/rendering/svg/ReferenceFilterBuilder.h"
40
41namespace blink {
42
43StyleResourceLoader::StyleResourceLoader(ResourceFetcher* fetcher)
44    : m_fetcher(fetcher)
45{
46}
47
48void StyleResourceLoader::loadPendingSVGDocuments(RenderStyle* renderStyle, ElementStyleResources& elementStyleResources)
49{
50    if (!renderStyle->hasFilter() || elementStyleResources.pendingSVGDocuments().isEmpty())
51        return;
52
53    Vector<RefPtr<FilterOperation> >& filterOperations = renderStyle->mutableFilter().operations();
54    for (unsigned i = 0; i < filterOperations.size(); ++i) {
55        RefPtr<FilterOperation> filterOperation = filterOperations.at(i);
56        if (filterOperation->type() == FilterOperation::REFERENCE) {
57            ReferenceFilterOperation* referenceFilter = toReferenceFilterOperation(filterOperation.get());
58
59            CSSSVGDocumentValue* value = elementStyleResources.pendingSVGDocuments().get(referenceFilter);
60            if (!value)
61                continue;
62            DocumentResource* resource = value->load(m_fetcher);
63            if (!resource)
64                continue;
65
66            // Stash the DocumentResource on the reference filter.
67            ReferenceFilterBuilder::setDocumentResourceReference(referenceFilter, adoptPtr(new DocumentResourceReference(resource)));
68        }
69    }
70
71    elementStyleResources.clearPendingSVGDocuments();
72}
73
74static PassRefPtr<StyleImage> doLoadPendingImage(ResourceFetcher* fetcher, StylePendingImage* pendingImage, float deviceScaleFactor, const ResourceLoaderOptions& options)
75{
76    if (CSSImageValue* imageValue = pendingImage->cssImageValue())
77        return imageValue->cachedImage(fetcher, options);
78
79    if (CSSImageGeneratorValue* imageGeneratorValue
80        = pendingImage->cssImageGeneratorValue()) {
81        imageGeneratorValue->loadSubimages(fetcher);
82        return StyleGeneratedImage::create(imageGeneratorValue);
83    }
84
85    if (CSSCursorImageValue* cursorImageValue
86        = pendingImage->cssCursorImageValue())
87        return cursorImageValue->cachedImage(fetcher, deviceScaleFactor);
88
89    if (CSSImageSetValue* imageSetValue = pendingImage->cssImageSetValue())
90        return imageSetValue->cachedImageSet(fetcher, deviceScaleFactor, options);
91
92    return nullptr;
93}
94
95PassRefPtr<StyleImage> StyleResourceLoader::loadPendingImage(StylePendingImage* pendingImage, float deviceScaleFactor)
96{
97    return doLoadPendingImage(m_fetcher, pendingImage, deviceScaleFactor, ResourceFetcher::defaultResourceOptions());
98}
99
100void StyleResourceLoader::loadPendingShapeImage(RenderStyle* renderStyle, ShapeValue* shapeValue, float deviceScaleFactor)
101{
102    if (!shapeValue)
103        return;
104
105    StyleImage* image = shapeValue->image();
106    if (!image || !image->isPendingImage())
107        return;
108
109    ResourceLoaderOptions options = ResourceFetcher::defaultResourceOptions();
110    options.allowCredentials = DoNotAllowStoredCredentials;
111    options.credentialsRequested  = ClientDidNotRequestCredentials;
112    options.corsEnabled = IsCORSEnabled;
113
114    shapeValue->setImage(doLoadPendingImage(m_fetcher, toStylePendingImage(image), deviceScaleFactor, options));
115}
116
117void StyleResourceLoader::loadPendingImages(RenderStyle* style, ElementStyleResources& elementStyleResources)
118{
119    if (elementStyleResources.pendingImageProperties().isEmpty())
120        return;
121
122    PendingImagePropertyMap::const_iterator::Keys end = elementStyleResources.pendingImageProperties().end().keys();
123    for (PendingImagePropertyMap::const_iterator::Keys it = elementStyleResources.pendingImageProperties().begin().keys(); it != end; ++it) {
124        CSSPropertyID currentProperty = *it;
125
126        switch (currentProperty) {
127        case CSSPropertyBackgroundImage: {
128            for (FillLayer* backgroundLayer = &style->accessBackgroundLayers(); backgroundLayer; backgroundLayer = backgroundLayer->next()) {
129                if (backgroundLayer->image() && backgroundLayer->image()->isPendingImage())
130                    backgroundLayer->setImage(loadPendingImage(toStylePendingImage(backgroundLayer->image()), elementStyleResources.deviceScaleFactor()));
131            }
132            break;
133        }
134        case CSSPropertyContent: {
135            for (ContentData* contentData = const_cast<ContentData*>(style->contentData()); contentData; contentData = contentData->next()) {
136                if (contentData->isImage()) {
137                    StyleImage* image = toImageContentData(contentData)->image();
138                    if (image->isPendingImage()) {
139                        RefPtr<StyleImage> loadedImage = loadPendingImage(toStylePendingImage(image), elementStyleResources.deviceScaleFactor());
140                        if (loadedImage)
141                            toImageContentData(contentData)->setImage(loadedImage.release());
142                    }
143                }
144            }
145            break;
146        }
147        case CSSPropertyCursor: {
148            if (CursorList* cursorList = style->cursors()) {
149                for (size_t i = 0; i < cursorList->size(); ++i) {
150                    CursorData& currentCursor = cursorList->at(i);
151                    if (StyleImage* image = currentCursor.image()) {
152                        if (image->isPendingImage())
153                            currentCursor.setImage(loadPendingImage(toStylePendingImage(image), elementStyleResources.deviceScaleFactor()));
154                    }
155                }
156            }
157            break;
158        }
159        case CSSPropertyListStyleImage: {
160            if (style->listStyleImage() && style->listStyleImage()->isPendingImage())
161                style->setListStyleImage(loadPendingImage(toStylePendingImage(style->listStyleImage()), elementStyleResources.deviceScaleFactor()));
162            break;
163        }
164        case CSSPropertyBorderImageSource: {
165            if (style->borderImageSource() && style->borderImageSource()->isPendingImage())
166                style->setBorderImageSource(loadPendingImage(toStylePendingImage(style->borderImageSource()), elementStyleResources.deviceScaleFactor()));
167            break;
168        }
169        case CSSPropertyWebkitBoxReflect: {
170            if (StyleReflection* reflection = style->boxReflect()) {
171                const NinePieceImage& maskImage = reflection->mask();
172                if (maskImage.image() && maskImage.image()->isPendingImage()) {
173                    RefPtr<StyleImage> loadedImage = loadPendingImage(toStylePendingImage(maskImage.image()), elementStyleResources.deviceScaleFactor());
174                    reflection->setMask(NinePieceImage(loadedImage.release(), maskImage.imageSlices(), maskImage.fill(), maskImage.borderSlices(), maskImage.outset(), maskImage.horizontalRule(), maskImage.verticalRule()));
175                }
176            }
177            break;
178        }
179        case CSSPropertyWebkitMaskBoxImageSource: {
180            if (style->maskBoxImageSource() && style->maskBoxImageSource()->isPendingImage())
181                style->setMaskBoxImageSource(loadPendingImage(toStylePendingImage(style->maskBoxImageSource()), elementStyleResources.deviceScaleFactor()));
182            break;
183        }
184        case CSSPropertyWebkitMaskImage: {
185            for (FillLayer* maskLayer = &style->accessMaskLayers(); maskLayer; maskLayer = maskLayer->next()) {
186                if (maskLayer->image() && maskLayer->image()->isPendingImage())
187                    maskLayer->setImage(loadPendingImage(toStylePendingImage(maskLayer->image()), elementStyleResources.deviceScaleFactor()));
188            }
189            break;
190        }
191        case CSSPropertyShapeOutside:
192            loadPendingShapeImage(style, style->shapeOutside(), elementStyleResources.deviceScaleFactor());
193            break;
194        default:
195            ASSERT_NOT_REACHED();
196        }
197    }
198
199    elementStyleResources.clearPendingImageProperties();
200}
201
202void StyleResourceLoader::loadPendingResources(RenderStyle* renderStyle, ElementStyleResources& elementStyleResources)
203{
204    // Start loading images referenced by this style.
205    loadPendingImages(renderStyle, elementStyleResources);
206
207    // Start loading the SVG Documents referenced by this style.
208    loadPendingSVGDocuments(renderStyle, elementStyleResources);
209}
210
211}
212