third_party/WebKit/Source/core/css/CSSImportRule.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, 2008, 2009, 2010, 2012 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 #include "config.h"
  23 #include "core/css/CSSImportRule.h"
  24
  25 #include "core/css/CSSStyleSheet.h"
  26 #include "core/css/MediaList.h"
  27 #include "core/css/StyleRuleImport.h"
  28 #include "core/css/StyleSheetContents.h"
  29 #include "wtf/text/StringBuilder.h"
  30
  31 namespace blink {
  32
  33 CSSImportRule::CSSImportRule(StyleRuleImport* importRule, CSSStyleSheet* parent)
  34     : CSSRule(parent)
  35     , m_importRule(importRule)
  36 {
  37 }
  38
  39 CSSImportRule::~CSSImportRule()
  40 {
  41 #if !ENABLE(OILPAN)
  42     if (m_styleSheetCSSOMWrapper)
  43         m_styleSheetCSSOMWrapper->clearOwnerRule();
  44
  45     if (m_mediaCSSOMWrapper)
  46         m_mediaCSSOMWrapper->clearParentRule();
  47 #endif // ENABLE(OILPAN)
  48 }
  49
  50 String CSSImportRule::href() const
  51 {
  52     return m_importRule->href();
  53 }
  54
  55 MediaList* CSSImportRule::media() const
  56 {
  57     if (!m_mediaCSSOMWrapper)
  58         m_mediaCSSOMWrapper = MediaList::create(m_importRule->mediaQueries(), const_cast<CSSImportRule*>(this));
  59     return m_mediaCSSOMWrapper.get();
  60 }
  61
  62 String CSSImportRule::cssText() const
  63 {
  64     StringBuilder result;
  65     result.appendLiteral("@import url(\"");
  66     result.append(m_importRule->href());
  67     result.appendLiteral("\")");
  68
  69     if (m_importRule->mediaQueries()) {
  70         String mediaText = m_importRule->mediaQueries()->mediaText();
  71         if (!mediaText.isEmpty()) {
  72             result.append(' ');
  73             result.append(mediaText);
  74         }
  75     }
  76     result.append(';');
  77
  78     return result.toString();
  79 }
  80
  81 CSSStyleSheet* CSSImportRule::styleSheet() const
  82 {
  83     if (!m_importRule->styleSheet())
  84         return nullptr;
  85
  86     if (!m_styleSheetCSSOMWrapper)
  87         m_styleSheetCSSOMWrapper = CSSStyleSheet::create(m_importRule->styleSheet(), const_cast<CSSImportRule*>(this));
  88     return m_styleSheetCSSOMWrapper.get();
  89 }
  90
  91 void CSSImportRule::reattach(StyleRuleBase*)
  92 {
  93     // FIXME: Implement when enabling caching for stylesheets with import rules.
  94     ASSERT_NOT_REACHED();
  95 }
  96
  97 DEFINE_TRACE(CSSImportRule)
  98 {
  99     visitor->trace(m_importRule);
 100     visitor->trace(m_mediaCSSOMWrapper);
 101     visitor->trace(m_styleSheetCSSOMWrapper);
 102     CSSRule::trace(visitor);
 103 }
 104
 105 } // namespace blink