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 CachedCSSStyleSheet_h
27#define CachedCSSStyleSheet_h
28
29#include "CachedResource.h"
30#include <wtf/Vector.h>
31
32namespace WebCore {
33
34    class CachedResourceClient;
35    class StyleSheetContents;
36    class TextResourceDecoder;
37    struct CSSParserContext;
38
39    class CachedCSSStyleSheet final : public CachedResource {
40    public:
41        CachedCSSStyleSheet(const ResourceRequest&, const String& charset, SessionID);
42        virtual ~CachedCSSStyleSheet();
43
44        const String sheetText(bool enforceMIMEType = true, bool* hasValidMIMEType = 0) const;
45
46        PassRefPtr<StyleSheetContents> restoreParsedStyleSheet(const CSSParserContext&);
47        void saveParsedStyleSheet(PassRef<StyleSheetContents>);
48
49    private:
50        bool canUseSheet(bool enforceMIMEType, bool* hasValidMIMEType) const;
51        virtual PurgePriority purgePriority() const override { return PurgeLast; }
52        virtual bool mayTryReplaceEncodedData() const override { return true; }
53
54        virtual void didAddClient(CachedResourceClient*) override;
55
56        virtual void setEncoding(const String&) override;
57        virtual String encoding() const override;
58        virtual void finishLoading(ResourceBuffer*) override;
59        virtual void destroyDecodedData() override;
60
61    protected:
62        virtual void checkNotify() override;
63
64        RefPtr<TextResourceDecoder> m_decoder;
65        String m_decodedSheetText;
66
67        RefPtr<StyleSheetContents> m_parsedStyleSheetCache;
68    };
69
70CACHED_RESOURCE_TYPE_CASTS(CachedCSSStyleSheet, CachedResource, CachedResource::CSSStyleSheet)
71
72}
73
74#endif
75