third_party/WebKit/Source/core/css/CSSRule.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, 2007, 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/CSSRule.h"
  24
  25 #include "core/css/CSSStyleSheet.h"
  26 #include "core/css/StyleRule.h"
  27 #include "core/css/StyleSheetContents.h"
  28 #include "platform/NotImplemented.h"
  29
  30 namespace blink {
  31
  32 struct SameSizeAsCSSRule : public RefCountedWillBeGarbageCollectedFinalized<SameSizeAsCSSRule>, public ScriptWrappable {
  33     virtual ~SameSizeAsCSSRule();
  34     unsigned char bitfields;
  35     void* pointerUnion;
  36 };
  37
  38 static_assert(sizeof(CSSRule) == sizeof(SameSizeAsCSSRule), "CSSRule should stay small");
  39
  40 void CSSRule::setCSSText(const String&)
  41 {
  42     notImplemented();
  43 }
  44
  45 const CSSParserContext& CSSRule::parserContext() const
  46 {
  47     CSSStyleSheet* styleSheet = parentStyleSheet();
  48     return styleSheet ? styleSheet->contents()->parserContext() : strictCSSParserContext();
  49 }
  50
  51 DEFINE_TRACE(CSSRule)
  52 {
  53 #if ENABLE(OILPAN)
  54     // This makes the parent link strong, which is different from the
  55     // pre-oilpan world, where the parent link is mysteriously zeroed under
  56     // some circumstances.
  57     if (m_parentIsRule)
  58         visitor->trace(m_parentRule);
  59     else
  60         visitor->trace(m_parentStyleSheet);
  61 #endif
  62 }
  63
  64 } // namespace blink