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      1 /*
      2  * (C) 1999-2003 Lars Knoll (knoll (at) 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 "core/dom/ExceptionCode.h"
     25 #include "wtf/Forward.h"
     26 #include "wtf/PassRefPtr.h"
     27 #include "wtf/RefCounted.h"
     28 #include "wtf/Vector.h"
     29 #include "wtf/text/WTFString.h"
     30 
     31 namespace WebCore {
     32 
     33 class CSSRule;
     34 class CSSStyleSheet;
     35 class Document;
     36 class ExceptionState;
     37 class MediaList;
     38 class MediaQuery;
     39 
     40 class MediaQuerySet : public RefCounted<MediaQuerySet> {
     41 public:
     42     static PassRefPtr<MediaQuerySet> create()
     43     {
     44         return adoptRef(new MediaQuerySet());
     45     }
     46     static PassRefPtr<MediaQuerySet> create(const String& mediaString);
     47     ~MediaQuerySet();
     48 
     49     bool set(const String&);
     50     bool add(const String&);
     51     bool remove(const String&);
     52 
     53     void addMediaQuery(PassOwnPtr<MediaQuery>);
     54 
     55     const Vector<OwnPtr<MediaQuery> >& queryVector() const { return m_queries; }
     56 
     57     String mediaText() const;
     58 
     59     PassRefPtr<MediaQuerySet> copy() const { return adoptRef(new MediaQuerySet(*this)); }
     60 
     61 private:
     62     MediaQuerySet();
     63     MediaQuerySet(const MediaQuerySet&);
     64 
     65     Vector<OwnPtr<MediaQuery> > m_queries;
     66 };
     67 
     68 class MediaList : public RefCounted<MediaList> {
     69 public:
     70     static PassRefPtr<MediaList> create(MediaQuerySet* mediaQueries, CSSStyleSheet* parentSheet)
     71     {
     72         return adoptRef(new MediaList(mediaQueries, parentSheet));
     73     }
     74     static PassRefPtr<MediaList> create(MediaQuerySet* mediaQueries, CSSRule* parentRule)
     75     {
     76         return adoptRef(new MediaList(mediaQueries, parentRule));
     77     }
     78 
     79     ~MediaList();
     80 
     81     unsigned length() const { return m_mediaQueries->queryVector().size(); }
     82     String item(unsigned index) const;
     83     void deleteMedium(const String& oldMedium, ExceptionState&);
     84     void appendMedium(const String& newMedium, ExceptionState&);
     85 
     86     String mediaText() const { return m_mediaQueries->mediaText(); }
     87     void setMediaText(const String&);
     88 
     89     // Not part of CSSOM.
     90     CSSRule* parentRule() const { return m_parentRule; }
     91     CSSStyleSheet* parentStyleSheet() const { return m_parentStyleSheet; }
     92     void clearParentStyleSheet() { ASSERT(m_parentStyleSheet); m_parentStyleSheet = 0; }
     93     void clearParentRule() { ASSERT(m_parentRule); m_parentRule = 0; }
     94     const MediaQuerySet* queries() const { return m_mediaQueries.get(); }
     95 
     96     void reattach(MediaQuerySet*);
     97 
     98 private:
     99     MediaList();
    100     MediaList(MediaQuerySet*, CSSStyleSheet* parentSheet);
    101     MediaList(MediaQuerySet*, CSSRule* parentRule);
    102 
    103     RefPtr<MediaQuerySet> m_mediaQueries;
    104     CSSStyleSheet* m_parentStyleSheet;
    105     CSSRule* m_parentRule;
    106 };
    107 
    108 // Adds message to inspector console whenever dpi or dpcm values are used for "screen" media.
    109 void reportMediaQueryWarningIfNeeded(Document*, const MediaQuerySet*);
    110 
    111 } // namespace
    112 
    113 #endif
    114