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      1 /**
      2  * (C) 1999-2003 Lars Knoll (knoll (at) kde.org)
      3  * (C) 2002-2003 Dirk Mueller (mueller (at) kde.org)
      4  * Copyright (C) 2002, 2005, 2006, 2012 Apple Computer, Inc.
      5  * Copyright (C) 2006 Samuel Weinig (sam (at) webkit.org)
      6  *
      7  * This library is free software; you can redistribute it and/or
      8  * modify it under the terms of the GNU Library General Public
      9  * License as published by the Free Software Foundation; either
     10  * version 2 of the License, or (at your option) any later version.
     11  *
     12  * This library is distributed in the hope that it will be useful,
     13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     15  * Library General Public License for more details.
     16  *
     17  * You should have received a copy of the GNU Library General Public License
     18  * along with this library; see the file COPYING.LIB.  If not, write to
     19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     20  * Boston, MA 02110-1301, USA.
     21  */
     22 
     23 #include "config.h"
     24 #include "core/css/CSSMediaRule.h"
     25 
     26 #include "core/css/StyleRule.h"
     27 #include "wtf/text/StringBuilder.h"
     28 
     29 namespace WebCore {
     30 
     31 CSSMediaRule::CSSMediaRule(StyleRuleMedia* mediaRule, CSSStyleSheet* parent)
     32     : CSSGroupingRule(mediaRule, parent)
     33 {
     34 }
     35 
     36 CSSMediaRule::~CSSMediaRule()
     37 {
     38 #if !ENABLE(OILPAN)
     39     if (m_mediaCSSOMWrapper)
     40         m_mediaCSSOMWrapper->clearParentRule();
     41 #endif
     42 }
     43 
     44 MediaQuerySet* CSSMediaRule::mediaQueries() const
     45 {
     46     return toStyleRuleMedia(m_groupRule.get())->mediaQueries();
     47 }
     48 
     49 String CSSMediaRule::cssText() const
     50 {
     51     StringBuilder result;
     52     result.append("@media ");
     53     if (mediaQueries()) {
     54         result.append(mediaQueries()->mediaText());
     55         result.append(' ');
     56     }
     57     result.appendLiteral("{ \n");
     58     appendCSSTextForItems(result);
     59     result.append('}');
     60     return result.toString();
     61 }
     62 
     63 MediaList* CSSMediaRule::media() const
     64 {
     65     if (!mediaQueries())
     66         return 0;
     67     if (!m_mediaCSSOMWrapper)
     68         m_mediaCSSOMWrapper = MediaList::create(mediaQueries(), const_cast<CSSMediaRule*>(this));
     69     return m_mediaCSSOMWrapper.get();
     70 }
     71 
     72 void CSSMediaRule::reattach(StyleRuleBase* rule)
     73 {
     74     CSSGroupingRule::reattach(rule);
     75     if (m_mediaCSSOMWrapper && mediaQueries())
     76         m_mediaCSSOMWrapper->reattach(mediaQueries());
     77 }
     78 
     79 void CSSMediaRule::trace(Visitor* visitor)
     80 {
     81     visitor->trace(m_mediaCSSOMWrapper);
     82     CSSGroupingRule::trace(visitor);
     83 }
     84 } // namespace WebCore
     85