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 "core/css/StyleRule.h"
26#include "core/fetch/ResourcePtr.h"
27#include "core/fetch/StyleSheetResourceClient.h"
28#include "platform/heap/Handle.h"
29
30namespace blink {
31
32class CSSStyleSheetResource;
33class MediaQuerySet;
34class StyleSheetContents;
35
36class StyleRuleImport : public StyleRuleBase {
37    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
38public:
39    static PassRefPtrWillBeRawPtr<StyleRuleImport> create(const String& href, PassRefPtrWillBeRawPtr<MediaQuerySet>);
40
41    ~StyleRuleImport();
42
43    StyleSheetContents* parentStyleSheet() const { return m_parentStyleSheet; }
44    void setParentStyleSheet(StyleSheetContents* sheet) { ASSERT(sheet); m_parentStyleSheet = sheet; }
45    void clearParentStyleSheet() { m_parentStyleSheet = nullptr; }
46
47    String href() const { return m_strHref; }
48    StyleSheetContents* styleSheet() const { return m_styleSheet.get(); }
49
50    bool isLoading() const;
51    MediaQuerySet* mediaQueries() { return m_mediaQueries.get(); }
52
53    void requestStyleSheet();
54
55    void traceAfterDispatch(Visitor*);
56
57private:
58    // FIXME: inherit from StyleSheetResourceClient directly to eliminate raw back pointer, as there are no space savings in this.
59    // NOTE: We put the StyleSheetResourceClient in a member instead of inheriting from it
60    // to avoid adding a vptr to StyleRuleImport.
61    class ImportedStyleSheetClient FINAL : public StyleSheetResourceClient {
62    public:
63        ImportedStyleSheetClient(StyleRuleImport* ownerRule) : m_ownerRule(ownerRule) { }
64        virtual ~ImportedStyleSheetClient() { }
65        virtual void setCSSStyleSheet(const String& href, const KURL& baseURL, const String& charset, const CSSStyleSheetResource* sheet) OVERRIDE
66        {
67            m_ownerRule->setCSSStyleSheet(href, baseURL, charset, sheet);
68        }
69    private:
70        StyleRuleImport* m_ownerRule;
71    };
72
73    void setCSSStyleSheet(const String& href, const KURL& baseURL, const String& charset, const CSSStyleSheetResource*);
74    friend class ImportedStyleSheetClient;
75
76    StyleRuleImport(const String& href, PassRefPtrWillBeRawPtr<MediaQuerySet>);
77
78    RawPtrWillBeMember<StyleSheetContents> m_parentStyleSheet;
79
80    ImportedStyleSheetClient m_styleSheetClient;
81    String m_strHref;
82    RefPtrWillBeMember<MediaQuerySet> m_mediaQueries;
83    RefPtrWillBeMember<StyleSheetContents> m_styleSheet;
84    ResourcePtr<CSSStyleSheetResource> m_resource;
85    bool m_loading;
86};
87
88DEFINE_STYLE_RULE_TYPE_CASTS(Import);
89
90} // namespace blink
91
92#endif
93