text: /*
   * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
   * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
   * Copyright (C) 2013 Google Inc. All rights reserved.
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Library General Public
   * License as published by the Free Software Foundation; either
   * version 2 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Library General Public License for more details.
   *
   * You should have received a copy of the GNU Library General Public License
   * along with this library; see the file COPYING.LIB.  If not, write to
   * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   * Boston, MA 02110-1301, USA.
   *
   */
  
  #ifndef ElementStyleResources_h
  #define ElementStyleResources_h
  
  #include "core/CSSPropertyNames.h"
  #include "core/css/CSSPropertyIDTemplates.h"
  #include "platform/CrossOriginAttributeValue.h"
  #include "platform/graphics/Color.h"
  #include "platform/heap/Handle.h"
  #include "wtf/HashMap.h"
  #include "wtf/Noncopyable.h"
  
  namespace blink {
  
  class CSSCursorImageValue;
  class CSSImageGeneratorValue;
  class CSSImageSetValue;
  class CSSImageValue;
  class CSSSVGDocumentValue;
  class CSSValue;
  class ComputedStyle;
  class Document;
  class FilterOperation;
  class StyleImage;
  class StylePendingImage;
  
  // Holds information about resources, requested by stylesheets.
  // Lifetime: per-element style resolve.
  class ElementStyleResources {
      STACK_ALLOCATED();
      WTF_MAKE_NONCOPYABLE(ElementStyleResources);
  public:
      ElementStyleResources(Document&, float deviceScaleFactor);
  
      StyleImage* styleImage(CSSPropertyID, const CSSValue&);
      StyleImage* cachedOrPendingFromValue(CSSPropertyID, const CSSImageValue&);
      StyleImage* setOrPendingFromValue(CSSPropertyID, const CSSImageSetValue&);
  
      void loadPendingResources(ComputedStyle*);
  
      void addPendingSVGDocument(FilterOperation*, const CSSSVGDocumentValue*);
  
  private:
      StyleImage* cursorOrPendingFromValue(CSSPropertyID, const CSSCursorImageValue&);
      StyleImage* generatedOrPendingFromValue(CSSPropertyID, const CSSImageGeneratorValue&);
  
      void loadPendingSVGDocuments(ComputedStyle*);
      void loadPendingImages(ComputedStyle*);
  
      StyleImage* loadPendingImage(ComputedStyle*, StylePendingImage*, CrossOriginAttributeValue = CrossOriginAttributeNotSet);
  
      Member<Document> m_document;
      HashSet<CSSPropertyID> m_pendingImageProperties;
      HeapHashMap<Member<FilterOperation>, Member<const CSSSVGDocumentValue>> m_pendingSVGDocuments;
      float m_deviceScaleFactor;
  };
  
  } // namespace blink
  
  #endif // ElementStyleResources_h
  