1/*
2 * (C) 1999-2003 Lars Knoll (knoll@kde.org)
3 * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
4 * Copyright (C) 2002, 2006, 2008, 2012 Apple 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#ifndef StyleRuleImport_h
23#define StyleRuleImport_h
24
25#include "CachedResourceHandle.h"
26#include "CachedStyleSheetClient.h"
27#include "StyleRule.h"
28
29namespace WebCore {
30
31class CachedCSSStyleSheet;
32class MediaQuerySet;
33class StyleSheetContents;
34
35class StyleRuleImport : public StyleRuleBase {
36    WTF_MAKE_FAST_ALLOCATED;
37public:
38    static PassRefPtr<StyleRuleImport> create(const String& href, PassRefPtr<MediaQuerySet>);
39
40    ~StyleRuleImport();
41
42    StyleSheetContents* parentStyleSheet() const { return m_parentStyleSheet; }
43    void setParentStyleSheet(StyleSheetContents* sheet) { ASSERT(sheet); m_parentStyleSheet = sheet; }
44    void clearParentStyleSheet() { m_parentStyleSheet = 0; }
45
46    String href() const { return m_strHref; }
47    StyleSheetContents* styleSheet() const { return m_styleSheet.get(); }
48
49    bool isLoading() const;
50    MediaQuerySet* mediaQueries() { return m_mediaQueries.get(); }
51
52    void requestStyleSheet();
53
54private:
55    // NOTE: We put the CachedStyleSheetClient in a member instead of inheriting from it
56    // to avoid adding a vptr to StyleRuleImport.
57    class ImportedStyleSheetClient : public CachedStyleSheetClient {
58    public:
59        ImportedStyleSheetClient(StyleRuleImport* ownerRule) : m_ownerRule(ownerRule) { }
60        virtual ~ImportedStyleSheetClient() { }
61        virtual void setCSSStyleSheet(const String& href, const KURL& baseURL, const String& charset, const CachedCSSStyleSheet* sheet)
62        {
63            m_ownerRule->setCSSStyleSheet(href, baseURL, charset, sheet);
64        }
65    private:
66        StyleRuleImport* m_ownerRule;
67    };
68
69    void setCSSStyleSheet(const String& href, const KURL& baseURL, const String& charset, const CachedCSSStyleSheet*);
70    friend class ImportedStyleSheetClient;
71
72    StyleRuleImport(const String& href, PassRefPtr<MediaQuerySet>);
73
74    StyleSheetContents* m_parentStyleSheet;
75
76    ImportedStyleSheetClient m_styleSheetClient;
77    String m_strHref;
78    RefPtr<MediaQuerySet> m_mediaQueries;
79    RefPtr<StyleSheetContents> m_styleSheet;
80    CachedResourceHandle<CachedCSSStyleSheet> m_cachedSheet;
81    bool m_loading;
82};
83
84} // namespace WebCore
85
86#endif
87