third_party/WebKit/Source/core/css/CSSImageValue.h

   1 /*
   2  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
   3  * Copyright (C) 2004, 2005, 2006, 2008, 2012 Apple Inc. All rights reserved.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Library General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Library General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Library General Public License
  16  * along with this library; see the file COPYING.LIB.  If not, write to
  17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  18  * Boston, MA 02110-1301, USA.
  19  */
  20
  21 #ifndef CSSImageValue_h
  22 #define CSSImageValue_h
  23
  24 #include "core/css/CSSValue.h"
  25 #include "core/fetch/ResourceFetcher.h"
  26 #include "platform/weborigin/Referrer.h"
  27 #include "wtf/RefPtr.h"
  28
  29 namespace blink {
  30
  31 class Document;
  32 class KURL;
  33 class StyleFetchedImage;
  34 class StyleImage;
  35 class LayoutObject;
  36
  37 class CSSImageValue : public CSSValue {
  38 public:
  39     static PassRefPtrWillBeRawPtr<CSSImageValue> create(const KURL& url, StyleImage* image = 0)
  40     {
  41         return create(url.string(), url, image);
  42     }
  43     static PassRefPtrWillBeRawPtr<CSSImageValue> create(const String& rawValue, const KURL& url, StyleImage* image = 0)
  44     {
  45         return create(AtomicString(rawValue), url, image);
  46     }
  47     static PassRefPtrWillBeRawPtr<CSSImageValue> create(const AtomicString& rawValue, const KURL& url, StyleImage* image = 0)
  48     {
  49         return adoptRefWillBeNoop(new CSSImageValue(rawValue, url, image));
  50     }
  51     ~CSSImageValue();
  52
  53     StyleFetchedImage* cachedImage(Document*, const ResourceLoaderOptions&);
  54     StyleFetchedImage* cachedImage(Document* document) { return cachedImage(document, ResourceFetcher::defaultResourceOptions()); }
  55     // Returns a StyleFetchedImage if the image is cached already, otherwise a StylePendingImage.
  56     StyleImage* cachedOrPendingImage();
  57
  58     const String& url() { return m_absoluteURL; }
  59
  60     void setReferrer(const Referrer& referrer) { m_referrer = referrer; }
  61     const Referrer& referrer() const { return m_referrer; }
  62
  63     void reResolveURL(const Document&);
  64
  65     String customCSSText() const;
  66
  67     bool hasFailedOrCanceledSubresources() const;
  68
  69     bool equals(const CSSImageValue&) const;
  70
  71     bool knownToBeOpaque(const LayoutObject*) const;
  72
  73     PassRefPtrWillBeRawPtr<CSSImageValue> valueWithURLMadeAbsolute()
  74     {
  75         return create(KURL(ParsedURLString, m_absoluteURL), m_image.get());
  76     }
  77
  78     void setInitiator(const AtomicString& name) { m_initiatorName = name; }
  79
  80     DECLARE_TRACE_AFTER_DISPATCH();
  81     void restoreCachedResourceIfNeeded(Document&);
  82
  83 private:
  84     CSSImageValue(const AtomicString& rawValue, const KURL&, StyleImage*);
  85
  86     AtomicString m_relativeURL;
  87     AtomicString m_absoluteURL;
  88     Referrer m_referrer;
  89     RefPtrWillBeMember<StyleImage> m_image;
  90     bool m_accessedImage;
  91     AtomicString m_initiatorName;
  92 };
  93
  94 DEFINE_CSS_VALUE_TYPE_CASTS(CSSImageValue, isImageValue());
  95
  96 } // namespace blink
  97
  98 #endif // CSSImageValue_h