1/*
2 * (C) 1999-2003 Lars Knoll (knoll@kde.org)
3 * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
4 * Copyright (C) 2002, 2006, 2012 Apple Computer, Inc.
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 CSSRuleList_h
23#define CSSRuleList_h
24
25#include "bindings/core/v8/ScriptWrappable.h"
26#include "platform/heap/Handle.h"
27#include "wtf/PassRefPtr.h"
28#include "wtf/RefPtr.h"
29#include "wtf/Vector.h"
30
31namespace blink {
32
33class CSSRule;
34class CSSStyleSheet;
35
36class CSSRuleList : public NoBaseWillBeGarbageCollectedFinalized<CSSRuleList>, public ScriptWrappable {
37    DEFINE_WRAPPERTYPEINFO();
38    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
39    WTF_MAKE_NONCOPYABLE(CSSRuleList);
40public:
41    virtual ~CSSRuleList();
42
43#if !ENABLE(OILPAN)
44    virtual void ref() = 0;
45    virtual void deref() = 0;
46#endif
47
48    virtual unsigned length() const = 0;
49    virtual CSSRule* item(unsigned index) const = 0;
50
51    virtual CSSStyleSheet* styleSheet() const = 0;
52
53    virtual void trace(Visitor*) { }
54
55protected:
56    CSSRuleList() { }
57};
58
59class StaticCSSRuleList FINAL : public CSSRuleList {
60public:
61    static PassRefPtrWillBeRawPtr<StaticCSSRuleList> create()
62    {
63        return adoptRefWillBeNoop(new StaticCSSRuleList());
64    }
65
66#if !ENABLE(OILPAN)
67    virtual void ref() OVERRIDE { ++m_refCount; }
68    virtual void deref() OVERRIDE;
69#endif
70
71    WillBeHeapVector<RefPtrWillBeMember<CSSRule> >& rules() { return m_rules; }
72
73    virtual CSSStyleSheet* styleSheet() const OVERRIDE { return 0; }
74
75    virtual void trace(Visitor*) OVERRIDE;
76
77private:
78    StaticCSSRuleList();
79    virtual ~StaticCSSRuleList();
80
81    virtual unsigned length() const OVERRIDE { return m_rules.size(); }
82    virtual CSSRule* item(unsigned index) const OVERRIDE { return index < m_rules.size() ? m_rules[index].get() : 0; }
83
84    WillBeHeapVector<RefPtrWillBeMember<CSSRule> > m_rules;
85#if !ENABLE(OILPAN)
86    unsigned m_refCount;
87#endif
88};
89
90template <class Rule>
91class LiveCSSRuleList FINAL : public CSSRuleList {
92public:
93    static PassOwnPtrWillBeRawPtr<LiveCSSRuleList> create(Rule* rule)
94    {
95        return adoptPtrWillBeNoop(new LiveCSSRuleList(rule));
96    }
97
98#if !ENABLE(OILPAN)
99    virtual void ref() OVERRIDE { m_rule->ref(); }
100    virtual void deref() OVERRIDE { m_rule->deref(); }
101#endif
102
103    virtual void trace(Visitor* visitor) OVERRIDE
104    {
105        visitor->trace(m_rule);
106        CSSRuleList::trace(visitor);
107    }
108
109private:
110    LiveCSSRuleList(Rule* rule) : m_rule(rule) { }
111
112    virtual unsigned length() const OVERRIDE { return m_rule->length(); }
113    virtual CSSRule* item(unsigned index) const OVERRIDE { return m_rule->item(index); }
114    virtual CSSStyleSheet* styleSheet() const OVERRIDE { return m_rule->parentStyleSheet(); }
115
116    RawPtrWillBeMember<Rule> m_rule;
117};
118
119} // namespace blink
120
121#endif // CSSRuleList_h
122