third_party/WebKit/Source/core/css/CSSMediaRule.cpp

   1 /**
   2  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
   3  * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
   4  * Copyright (C) 2002, 2005, 2006, 2012 Apple Computer, Inc.
   5  * Copyright (C) 2006 Samuel Weinig (sam@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 blink {
  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.appendLiteral("@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 nullptr;
  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 DEFINE_TRACE(CSSMediaRule)
  80 {
  81     visitor->trace(m_mediaCSSOMWrapper);
  82     CSSGroupingRule::trace(visitor);
  83 }
  84 } // namespace blink