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 <wtf/PassRefPtr.h>
26#include <wtf/RefCounted.h>
27#include <wtf/RefPtr.h>
28#include <wtf/Vector.h>
29#include <wtf/text/WTFString.h>
30
31namespace WebCore {
32
33class CSSRule;
34class CSSStyleSheet;
35
36class CSSRuleList {
37    WTF_MAKE_NONCOPYABLE(CSSRuleList); WTF_MAKE_FAST_ALLOCATED;
38public:
39    virtual ~CSSRuleList();
40
41    virtual void ref() = 0;
42    virtual void deref() = 0;
43
44    virtual unsigned length() const = 0;
45    virtual CSSRule* item(unsigned index) const = 0;
46
47    virtual CSSStyleSheet* styleSheet() const = 0;
48
49protected:
50    CSSRuleList();
51};
52
53class StaticCSSRuleList : public CSSRuleList {
54public:
55    static PassRefPtr<StaticCSSRuleList> create() { return adoptRef(new StaticCSSRuleList()); }
56
57    virtual void ref() { ++m_refCount; }
58    virtual void deref();
59
60    Vector<RefPtr<CSSRule> >& rules() { return m_rules; }
61
62    virtual CSSStyleSheet* styleSheet() const { return 0; }
63
64private:
65    StaticCSSRuleList();
66    ~StaticCSSRuleList();
67
68    virtual unsigned length() const { return m_rules.size(); }
69    virtual CSSRule* item(unsigned index) const { return index < m_rules.size() ? m_rules[index].get() : 0; }
70
71    Vector<RefPtr<CSSRule> > m_rules;
72    unsigned m_refCount;
73};
74
75// The rule owns the live list.
76template <class Rule>
77class LiveCSSRuleList : public CSSRuleList {
78public:
79    LiveCSSRuleList(Rule* rule) : m_rule(rule) { }
80
81    virtual void ref() { m_rule->ref(); }
82    virtual void deref() { m_rule->deref(); }
83
84private:
85    virtual unsigned length() const { return m_rule->length(); }
86    virtual CSSRule* item(unsigned index) const  { return m_rule->item(index); }
87    virtual CSSStyleSheet* styleSheet() const { return m_rule->parentStyleSheet(); }
88
89    Rule* m_rule;
90};
91
92} // namespace WebCore
93
94#endif // CSSRuleList_h
95