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      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) 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/ElementStyleResources.h"
     25 
     26 #include "core/css/CSSGradientValue.h"
     27 #include "core/css/CSSSVGDocumentValue.h"
     28 #include "core/rendering/style/StyleGeneratedImage.h"
     29 #include "core/rendering/style/StyleImage.h"
     30 #include "core/rendering/style/StylePendingImage.h"
     31 #include "platform/graphics/filters/FilterOperation.h"
     32 
     33 namespace WebCore {
     34 
     35 ElementStyleResources::ElementStyleResources()
     36     : m_deviceScaleFactor(1)
     37 {
     38 }
     39 
     40 PassRefPtr<StyleImage> ElementStyleResources::styleImage(Document& document, const TextLinkColors& textLinkColors, Color currentColor, CSSPropertyID property, CSSValue* value)
     41 {
     42     if (value->isImageValue())
     43         return cachedOrPendingFromValue(document, property, toCSSImageValue(value));
     44 
     45     if (value->isImageGeneratorValue()) {
     46         if (value->isGradientValue())
     47             return generatedOrPendingFromValue(property, toCSSGradientValue(value)->gradientWithStylesResolved(textLinkColors, currentColor).get());
     48         return generatedOrPendingFromValue(property, toCSSImageGeneratorValue(value));
     49     }
     50 
     51     if (value->isImageSetValue())
     52         return setOrPendingFromValue(property, toCSSImageSetValue(value));
     53 
     54     if (value->isCursorImageValue())
     55         return cursorOrPendingFromValue(property, toCSSCursorImageValue(value));
     56 
     57     return nullptr;
     58 }
     59 
     60 PassRefPtr<StyleImage> ElementStyleResources::generatedOrPendingFromValue(CSSPropertyID property, CSSImageGeneratorValue* value)
     61 {
     62     if (value->isPending()) {
     63         m_pendingImageProperties.set(property, value);
     64         return StylePendingImage::create(value);
     65     }
     66     return StyleGeneratedImage::create(value);
     67 }
     68 
     69 PassRefPtr<StyleImage> ElementStyleResources::setOrPendingFromValue(CSSPropertyID property, CSSImageSetValue* value)
     70 {
     71     RefPtr<StyleImage> image = value->cachedOrPendingImageSet(m_deviceScaleFactor);
     72     if (image && image->isPendingImage())
     73         m_pendingImageProperties.set(property, value);
     74     return image.release();
     75 }
     76 
     77 PassRefPtr<StyleImage> ElementStyleResources::cachedOrPendingFromValue(Document& document, CSSPropertyID property, CSSImageValue* value)
     78 {
     79     RefPtr<StyleImage> image = value->cachedOrPendingImage();
     80     if (image) {
     81         if (image->isPendingImage())
     82             m_pendingImageProperties.set(property, value);
     83         else
     84             value->restoreCachedResourceIfNeeded(document);
     85     }
     86     return image.release();
     87 }
     88 
     89 PassRefPtr<StyleImage> ElementStyleResources::cursorOrPendingFromValue(CSSPropertyID property, CSSCursorImageValue* value)
     90 {
     91     RefPtr<StyleImage> image = value->cachedOrPendingImage(m_deviceScaleFactor);
     92     if (image && image->isPendingImage())
     93         m_pendingImageProperties.set(property, value);
     94     return image.release();
     95 }
     96 
     97 void ElementStyleResources::clearPendingImageProperties()
     98 {
     99     m_pendingImageProperties.clear();
    100 }
    101 
    102 void ElementStyleResources::clearPendingSVGDocuments()
    103 {
    104     m_pendingSVGDocuments.clear();
    105 }
    106 
    107 void ElementStyleResources::addPendingSVGDocument(FilterOperation* filterOperation, CSSSVGDocumentValue* cssSVGDocumentValue)
    108 {
    109     m_pendingSVGDocuments.set(filterOperation, cssSVGDocumentValue);
    110 }
    111 
    112 }
    113