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7a32c83570
Also removed several ENABLE(OILPAN) checks. R=ojan@chromium.org, abarth@chromium.org Review URL: https://codereview.chromium.org/718873003
68 lines
2.5 KiB
C++
68 lines
2.5 KiB
C++
/*
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* (C) 1999-2003 Lars Knoll (knoll@kde.org)
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* (C) 2002-2003 Dirk Mueller (mueller@kde.org)
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* Copyright (C) 2002, 2005, 2006, 2007, 2012 Apple Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "config.h"
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#include "core/css/CSSRule.h"
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#include "core/css/CSSStyleSheet.h"
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#include "core/css/StyleRule.h"
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#include "core/css/StyleSheetContents.h"
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#include "platform/NotImplemented.h"
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namespace blink {
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// VC++ 2013 doesn't support EBCO (Empty Base Class Optimization), and having
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// multiple empty base classes makes the size of CSSRule bloat (Note that both
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// of GarbageCollectedFinalized and ScriptWrappableBase are empty classes).
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// See the following article for details.
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// http://social.msdn.microsoft.com/forums/vstudio/en-US/504c6598-6076-4acf-96b6-e6acb475d302/vc-multiple-inheritance-empty-base-classes-bloats-object-size
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//
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// FIXME: Remove ScriptWrappableBase from the base class list once VC++'s issue
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// gets fixed.
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// Note that we're going to split CSSRule class into two classes; CSSOMRule
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// (assumed name) which derives ScriptWrappable and CSSRule (new one) which
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// doesn't derive ScriptWrappable or ScriptWrappableBase. Then, we can safely
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// remove ScriptWrappableBase from the base class list.
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struct SameSizeAsCSSRule : public RefCounted<SameSizeAsCSSRule>, public ScriptWrappableBase {
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virtual ~SameSizeAsCSSRule();
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unsigned char bitfields;
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void* pointerUnion;
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};
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COMPILE_ASSERT(sizeof(CSSRule) == sizeof(SameSizeAsCSSRule), CSSRule_should_stay_small);
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void CSSRule::setCSSText(const String&)
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{
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notImplemented();
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}
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const CSSParserContext& CSSRule::parserContext() const
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{
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CSSStyleSheet* styleSheet = parentStyleSheet();
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return styleSheet ? styleSheet->contents()->parserContext() : strictCSSParserContext();
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}
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void CSSRule::trace(Visitor* visitor)
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{
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}
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} // namespace blink
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