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, 2013 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 StyleRule_h
23#define StyleRule_h
24
25#include "CSSSelectorList.h"
26#include "MediaList.h"
27#include "StyleProperties.h"
28#include <wtf/RefPtr.h>
29
30namespace WebCore {
31
32class CSSRule;
33class CSSStyleRule;
34class CSSStyleSheet;
35class MutableStyleProperties;
36class StyleProperties;
37
38class StyleRuleBase : public WTF::RefCountedBase {
39    WTF_MAKE_FAST_ALLOCATED;
40public:
41    enum Type {
42        Unknown, // Not used.
43        Style,
44        Charset, // Not used. These are internally strings owned by the style sheet.
45        Import,
46        Media,
47        FontFace,
48        Page,
49        Keyframes,
50        Keyframe, // Not used. These are internally non-rule StyleKeyframe objects.
51#if ENABLE(CSS3_CONDITIONAL_RULES)
52        Supports = 12,
53#endif
54#if ENABLE(CSS_DEVICE_ADAPTATION)
55        Viewport = 15,
56#endif
57        Region = 16,
58    };
59
60    Type type() const { return static_cast<Type>(m_type); }
61
62    bool isCharsetRule() const { return type() == Charset; }
63    bool isFontFaceRule() const { return type() == FontFace; }
64    bool isKeyframesRule() const { return type() == Keyframes; }
65    bool isMediaRule() const { return type() == Media; }
66    bool isPageRule() const { return type() == Page; }
67    bool isStyleRule() const { return type() == Style; }
68    bool isRegionRule() const { return type() == Region; }
69#if ENABLE(CSS3_CONDITIONAL_RULES)
70    bool isSupportsRule() const { return type() == Supports; }
71#endif
72#if ENABLE(CSS_DEVICE_ADAPTATION)
73    bool isViewportRule() const { return type() == Viewport; }
74#endif
75    bool isImportRule() const { return type() == Import; }
76
77    PassRef<StyleRuleBase> copy() const;
78
79    int sourceLine() const { return m_sourceLine; }
80
81    void deref()
82    {
83        if (derefBase())
84            destroy();
85    }
86
87    // FIXME: There shouldn't be any need for the null parent version.
88    PassRefPtr<CSSRule> createCSSOMWrapper(CSSStyleSheet* parentSheet = 0) const;
89    PassRefPtr<CSSRule> createCSSOMWrapper(CSSRule* parentRule) const;
90
91protected:
92    StyleRuleBase(Type type, signed sourceLine = 0) : m_type(type), m_sourceLine(sourceLine) { }
93    StyleRuleBase(const StyleRuleBase& o) : WTF::RefCountedBase(), m_type(o.m_type), m_sourceLine(o.m_sourceLine) { }
94
95    ~StyleRuleBase() { }
96
97private:
98    void destroy();
99
100    PassRefPtr<CSSRule> createCSSOMWrapper(CSSStyleSheet* parentSheet, CSSRule* parentRule) const;
101
102    unsigned m_type : 5;
103    signed m_sourceLine : 27;
104};
105
106class StyleRule : public StyleRuleBase {
107    WTF_MAKE_FAST_ALLOCATED;
108public:
109    static PassRef<StyleRule> create(int sourceLine, PassRef<StyleProperties> properties)
110    {
111        return adoptRef(*new StyleRule(sourceLine, WTF::move(properties)));
112    }
113
114    ~StyleRule();
115
116    const CSSSelectorList& selectorList() const { return m_selectorList; }
117    const StyleProperties& properties() const { return m_properties.get(); }
118    MutableStyleProperties& mutableProperties();
119
120    void parserAdoptSelectorVector(Vector<std::unique_ptr<CSSParserSelector>>& selectors) { m_selectorList.adoptSelectorVector(selectors); }
121    void wrapperAdoptSelectorList(CSSSelectorList& selectors) { m_selectorList = WTF::move(selectors); }
122    void parserAdoptSelectorArray(CSSSelector* selectors) { m_selectorList.adoptSelectorArray(selectors); }
123
124    PassRef<StyleRule> copy() const { return adoptRef(*new StyleRule(*this)); }
125
126    Vector<RefPtr<StyleRule>> splitIntoMultipleRulesWithMaximumSelectorComponentCount(unsigned) const;
127
128    static unsigned averageSizeInBytes();
129
130private:
131    StyleRule(int sourceLine, PassRef<StyleProperties>);
132    StyleRule(const StyleRule&);
133
134    static PassRef<StyleRule> create(int sourceLine, const Vector<const CSSSelector*>&, PassRef<StyleProperties>);
135
136    Ref<StyleProperties> m_properties;
137    CSSSelectorList m_selectorList;
138};
139
140inline const StyleRule* toStyleRule(const StyleRuleBase* rule)
141{
142    ASSERT_WITH_SECURITY_IMPLICATION(!rule || rule->isStyleRule());
143    return static_cast<const StyleRule*>(rule);
144}
145
146class StyleRuleFontFace : public StyleRuleBase {
147public:
148    static PassRef<StyleRuleFontFace> create(PassRef<StyleProperties> properties) { return adoptRef(*new StyleRuleFontFace(WTF::move(properties))); }
149
150    ~StyleRuleFontFace();
151
152    const StyleProperties& properties() const { return m_properties.get(); }
153    MutableStyleProperties& mutableProperties();
154
155    PassRef<StyleRuleFontFace> copy() const { return adoptRef(*new StyleRuleFontFace(*this)); }
156
157
158private:
159    StyleRuleFontFace(PassRef<StyleProperties>);
160    StyleRuleFontFace(const StyleRuleFontFace&);
161
162    Ref<StyleProperties> m_properties;
163};
164
165class StyleRulePage : public StyleRuleBase {
166public:
167    static PassRef<StyleRulePage> create(PassRef<StyleProperties> properties) { return adoptRef(*new StyleRulePage(WTF::move(properties))); }
168
169    ~StyleRulePage();
170
171    const CSSSelector* selector() const { return m_selectorList.first(); }
172    const StyleProperties& properties() const { return m_properties.get(); }
173    MutableStyleProperties& mutableProperties();
174
175    void parserAdoptSelectorVector(Vector<std::unique_ptr<CSSParserSelector>>& selectors) { m_selectorList.adoptSelectorVector(selectors); }
176    void wrapperAdoptSelectorList(CSSSelectorList& selectors) { m_selectorList = WTF::move(selectors); }
177
178    PassRef<StyleRulePage> copy() const { return adoptRef(*new StyleRulePage(*this)); }
179
180private:
181    StyleRulePage(PassRef<StyleProperties>);
182    StyleRulePage(const StyleRulePage&);
183
184    Ref<StyleProperties> m_properties;
185    CSSSelectorList m_selectorList;
186};
187
188class StyleRuleGroup : public StyleRuleBase {
189public:
190    const Vector<RefPtr<StyleRuleBase>>& childRules() const { return m_childRules; }
191
192    void wrapperInsertRule(unsigned, PassRef<StyleRuleBase>);
193    void wrapperRemoveRule(unsigned);
194
195protected:
196    StyleRuleGroup(Type, Vector<RefPtr<StyleRuleBase>>& adoptRule);
197    StyleRuleGroup(const StyleRuleGroup&);
198
199private:
200    Vector<RefPtr<StyleRuleBase>> m_childRules;
201};
202
203class StyleRuleMedia : public StyleRuleGroup {
204public:
205    static PassRef<StyleRuleMedia> create(PassRefPtr<MediaQuerySet> media, Vector<RefPtr<StyleRuleBase>>& adoptRules)
206    {
207        return adoptRef(*new StyleRuleMedia(media, adoptRules));
208    }
209
210    MediaQuerySet* mediaQueries() const { return m_mediaQueries.get(); }
211
212    PassRef<StyleRuleMedia> copy() const { return adoptRef(*new StyleRuleMedia(*this)); }
213
214private:
215    StyleRuleMedia(PassRefPtr<MediaQuerySet>, Vector<RefPtr<StyleRuleBase>>& adoptRules);
216    StyleRuleMedia(const StyleRuleMedia&);
217
218    RefPtr<MediaQuerySet> m_mediaQueries;
219};
220
221#if ENABLE(CSS3_CONDITIONAL_RULES)
222class StyleRuleSupports : public StyleRuleGroup {
223public:
224    static PassRef<StyleRuleSupports> create(const String& conditionText, bool conditionIsSupported, Vector<RefPtr<StyleRuleBase>>& adoptRules)
225    {
226        return adoptRef(*new StyleRuleSupports(conditionText, conditionIsSupported, adoptRules));
227    }
228
229    String conditionText() const { return m_conditionText; }
230    bool conditionIsSupported() const { return m_conditionIsSupported; }
231    PassRef<StyleRuleSupports> copy() const { return adoptRef(*new StyleRuleSupports(*this)); }
232
233private:
234    StyleRuleSupports(const String& conditionText, bool conditionIsSupported, Vector<RefPtr<StyleRuleBase>>& adoptRules);
235    StyleRuleSupports(const StyleRuleSupports&);
236
237    String m_conditionText;
238    bool m_conditionIsSupported;
239};
240#endif
241
242class StyleRuleRegion : public StyleRuleGroup {
243public:
244    static PassRef<StyleRuleRegion> create(Vector<std::unique_ptr<CSSParserSelector>>* selectors, Vector<RefPtr<StyleRuleBase>>& adoptRules)
245    {
246        return adoptRef(*new StyleRuleRegion(selectors, adoptRules));
247    }
248
249    const CSSSelectorList& selectorList() const { return m_selectorList; }
250
251    PassRef<StyleRuleRegion> copy() const { return adoptRef(*new StyleRuleRegion(*this)); }
252
253private:
254    StyleRuleRegion(Vector<std::unique_ptr<CSSParserSelector>>*, Vector<RefPtr<StyleRuleBase>>& adoptRules);
255    StyleRuleRegion(const StyleRuleRegion&);
256
257    CSSSelectorList m_selectorList;
258};
259
260#if ENABLE(CSS_DEVICE_ADAPTATION)
261class StyleRuleViewport : public StyleRuleBase {
262public:
263    static PassRef<StyleRuleViewport> create(PassRef<StyleProperties> properties) { return adoptRef(*new StyleRuleViewport(WTF::move(properties))); }
264
265    ~StyleRuleViewport();
266
267    const StyleProperties& properties() const { return m_properties.get(); }
268    MutableStyleProperties& mutableProperties();
269
270    PassRef<StyleRuleViewport> copy() const { return adoptRef(*new StyleRuleViewport(*this)); }
271
272private:
273    StyleRuleViewport(PassRef<StyleProperties>);
274    StyleRuleViewport(const StyleRuleViewport&);
275
276    Ref<StyleProperties> m_properties;
277};
278#endif // ENABLE(CSS_DEVICE_ADAPTATION)
279
280inline const StyleRuleMedia* toStyleRuleMedia(const StyleRuleGroup* rule)
281{
282    ASSERT_WITH_SECURITY_IMPLICATION(!rule || rule->isMediaRule());
283    return static_cast<const StyleRuleMedia*>(rule);
284}
285
286#if ENABLE(CSS3_CONDITIONAL_RULES)
287inline const StyleRuleSupports* toStyleRuleSupports(const StyleRuleGroup* rule)
288{
289    ASSERT_WITH_SECURITY_IMPLICATION(!rule || rule->isSupportsRule());
290    return static_cast<const StyleRuleSupports*>(rule);
291}
292#endif
293
294inline const StyleRuleRegion* toStyleRuleRegion(const StyleRuleGroup* rule)
295{
296    ASSERT_WITH_SECURITY_IMPLICATION(!rule || rule->isRegionRule());
297    return static_cast<const StyleRuleRegion*>(rule);
298}
299
300} // namespace WebCore
301
302#endif // StyleRule_h
303