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#pragma once
23
24#include "CachedResourceHandle.h"
25#include "CachedStyleSheetClient.h"
26#include "StyleRule.h"
27#include <wtf/TypeCasts.h>
28
29namespace WebCore {
30
31class CachedCSSStyleSheet;
32class MediaQuerySet;
33class StyleSheetContents;
34
35class StyleRuleImport final : public StyleRuleBase {
36 WTF_MAKE_FAST_ALLOCATED;
37public:
38 static Ref<StyleRuleImport> create(const String& href, Ref<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() const { return m_mediaQueries.get(); }
51
52 void requestStyleSheet();
53 const CachedCSSStyleSheet* cachedCSSStyleSheet() const { return m_cachedSheet.get(); }
54
55private:
56 // NOTE: We put the CachedStyleSheetClient in a member instead of inheriting from it
57 // to avoid adding a vptr to StyleRuleImport.
58class ImportedStyleSheetClient final : public CachedStyleSheetClient {
59 public:
60 ImportedStyleSheetClient(StyleRuleImport* ownerRule) : m_ownerRule(ownerRule) { }
61 virtual ~ImportedStyleSheetClient() = default;
62 void setCSSStyleSheet(const String& href, const URL& baseURL, const String& charset, const CachedCSSStyleSheet* sheet) final
63 {
64 m_ownerRule->setCSSStyleSheet(href, baseURL, charset, sheet);
65 }
66 private:
67 StyleRuleImport* m_ownerRule;
68 };
69
70 void setCSSStyleSheet(const String& href, const URL& baseURL, const String& charset, const CachedCSSStyleSheet*);
71 friend class ImportedStyleSheetClient;
72
73 StyleRuleImport(const String& href, Ref<MediaQuerySet>&&);
74
75 StyleSheetContents* m_parentStyleSheet;
76
77 ImportedStyleSheetClient m_styleSheetClient;
78 String m_strHref;
79 RefPtr<MediaQuerySet> m_mediaQueries;
80 RefPtr<StyleSheetContents> m_styleSheet;
81 CachedResourceHandle<CachedCSSStyleSheet> m_cachedSheet;
82 bool m_loading;
83};
84
85} // namespace WebCore
86
87SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::StyleRuleImport)
88 static bool isType(const WebCore::StyleRuleBase& rule) { return rule.isImportRule(); }
89SPECIALIZE_TYPE_TRAITS_END()
90