1/*
2 * (C) 1999-2003 Lars Knoll (knoll@kde.org)
3 * Copyright (C) 2004, 2006, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB.  If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20
21#ifndef MediaList_h
22#define MediaList_h
23
24#include "bindings/core/v8/ScriptWrappable.h"
25#include "core/dom/ExceptionCode.h"
26#include "platform/heap/Handle.h"
27#include "wtf/Forward.h"
28#include "wtf/PassRefPtr.h"
29#include "wtf/RefCounted.h"
30#include "wtf/Vector.h"
31#include "wtf/text/WTFString.h"
32
33namespace blink {
34
35class CSSRule;
36class CSSStyleSheet;
37class Document;
38class ExceptionState;
39class MediaList;
40class MediaQuery;
41
42class MediaQuerySet : public RefCountedWillBeGarbageCollected<MediaQuerySet> {
43    DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(MediaQuerySet);
44public:
45    static PassRefPtrWillBeRawPtr<MediaQuerySet> create()
46    {
47        return adoptRefWillBeNoop(new MediaQuerySet());
48    }
49    static PassRefPtrWillBeRawPtr<MediaQuerySet> create(const String& mediaString);
50    static PassRefPtrWillBeRawPtr<MediaQuerySet> createOffMainThread(const String& mediaString);
51
52    bool set(const String&);
53    bool add(const String&);
54    bool remove(const String&);
55
56    void addMediaQuery(PassOwnPtrWillBeRawPtr<MediaQuery>);
57
58    const WillBeHeapVector<OwnPtrWillBeMember<MediaQuery> >& queryVector() const { return m_queries; }
59
60    String mediaText() const;
61
62    PassRefPtrWillBeRawPtr<MediaQuerySet> copy() const { return adoptRefWillBeNoop(new MediaQuerySet(*this)); }
63
64    void trace(Visitor*);
65
66private:
67    MediaQuerySet();
68    MediaQuerySet(const MediaQuerySet&);
69
70    WillBeHeapVector<OwnPtrWillBeMember<MediaQuery> > m_queries;
71};
72
73class MediaList : public RefCountedWillBeGarbageCollectedFinalized<MediaList>, public ScriptWrappable {
74    DEFINE_WRAPPERTYPEINFO();
75public:
76    static PassRefPtrWillBeRawPtr<MediaList> create(MediaQuerySet* mediaQueries, CSSStyleSheet* parentSheet)
77    {
78        return adoptRefWillBeNoop(new MediaList(mediaQueries, parentSheet));
79    }
80    static PassRefPtrWillBeRawPtr<MediaList> create(MediaQuerySet* mediaQueries, CSSRule* parentRule)
81    {
82        return adoptRefWillBeNoop(new MediaList(mediaQueries, parentRule));
83    }
84
85    ~MediaList();
86
87    unsigned length() const { return m_mediaQueries->queryVector().size(); }
88    String item(unsigned index) const;
89    void deleteMedium(const String& oldMedium, ExceptionState&);
90    void appendMedium(const String& newMedium, ExceptionState&);
91
92    String mediaText() const { return m_mediaQueries->mediaText(); }
93    void setMediaText(const String&);
94
95    // Not part of CSSOM.
96    CSSRule* parentRule() const { return m_parentRule; }
97    CSSStyleSheet* parentStyleSheet() const { return m_parentStyleSheet; }
98
99#if !ENABLE(OILPAN)
100    void clearParentStyleSheet() { ASSERT(m_parentStyleSheet); m_parentStyleSheet = nullptr; }
101    void clearParentRule() { ASSERT(m_parentRule); m_parentRule = nullptr; }
102#endif
103
104    const MediaQuerySet* queries() const { return m_mediaQueries.get(); }
105
106    void reattach(MediaQuerySet*);
107
108    void trace(Visitor*);
109
110private:
111    MediaList(MediaQuerySet*, CSSStyleSheet* parentSheet);
112    MediaList(MediaQuerySet*, CSSRule* parentRule);
113
114    RefPtrWillBeMember<MediaQuerySet> m_mediaQueries;
115    // Cleared in ~CSSStyleSheet destructor when oilpan is not enabled.
116    RawPtrWillBeMember<CSSStyleSheet> m_parentStyleSheet;
117    // Cleared in the ~CSSMediaRule and ~CSSImportRule destructors when oilpan is not enabled.
118    RawPtrWillBeMember<CSSRule> m_parentRule;
119};
120
121// Adds message to inspector console whenever dpi or dpcm values are used for "screen" media.
122void reportMediaQueryWarningIfNeeded(Document*, const MediaQuerySet*);
123
124} // namespace blink
125
126#endif
127