third_party/WebKit/Source/core/fetch/CSSStyleSheetResource.h

   1 /*
   2     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
   3     Copyright (C) 2001 Dirk Mueller <mueller@kde.org>
   4     Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
   5     Copyright (C) 2004, 2005, 2006, 2007, 2008 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     This class provides all functionality needed for loading images, style sheets and html
  23     pages from the web. It has a memory cache for these objects.
  24 */
  25
  26 #ifndef CSSStyleSheetResource_h
  27 #define CSSStyleSheetResource_h
  28
  29 #include "core/fetch/ResourcePtr.h"
  30 #include "core/fetch/StyleSheetResource.h"
  31 #include "platform/heap/Handle.h"
  32
  33 namespace blink {
  34
  35 class CSSParserContext;
  36 class FetchRequest;
  37 class ResourceClient;
  38 class ResourceFetcher;
  39 class StyleSheetContents;
  40
  41 class CSSStyleSheetResource final : public StyleSheetResource {
  42 public:
  43     enum class MIMETypeCheck { Strict, Lax };
  44
  45     static ResourcePtr<CSSStyleSheetResource> fetch(FetchRequest&, ResourceFetcher*);
  46
  47     ~CSSStyleSheetResource() override;
  48     DECLARE_VIRTUAL_TRACE();
  49
  50     const String sheetText(MIMETypeCheck = MIMETypeCheck::Strict) const;
  51
  52     const AtomicString mimeType() const;
  53
  54     void didAddClient(ResourceClient*) override;
  55
  56     PassRefPtrWillBeRawPtr<StyleSheetContents> restoreParsedStyleSheet(const CSSParserContext&);
  57     void saveParsedStyleSheet(PassRefPtrWillBeRawPtr<StyleSheetContents>);
  58
  59 protected:
  60     bool isSafeToUnlock() const override;
  61     void destroyDecodedDataIfPossible() override;
  62
  63 private:
  64     class CSSStyleSheetResourceFactory : public ResourceFactory {
  65     public:
  66         CSSStyleSheetResourceFactory()
  67             : ResourceFactory(Resource::CSSStyleSheet) { }
  68
  69         Resource* create(const ResourceRequest& request, const String& charset) const override
  70         {
  71             return new CSSStyleSheetResource(request, charset);
  72         }
  73     };
  74     CSSStyleSheetResource(const ResourceRequest&, const String& charset);
  75
  76     bool canUseSheet(MIMETypeCheck) const;
  77     void dispose() override;
  78     void checkNotify() override;
  79
  80     String m_decodedSheetText;
  81
  82     RefPtrWillBeMember<StyleSheetContents> m_parsedStyleSheetCache;
  83 };
  84
  85 DEFINE_RESOURCE_TYPE_CASTS(CSSStyleSheet);
  86
  87 }
  88
  89 #endif