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/*
* Copyright (C) 2000 Lars Knoll (knoll@kde.org)
* Copyright (C) 2003, 2004, 2006, 2007, 2009, 2010 Apple Inc. All right reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "BidiContext.h"
namespace WebCore {
using namespace WTF::Unicode;
inline PassRefPtr<BidiContext> BidiContext::createUncached(unsigned char level, Direction direction, bool override, BidiContext* parent)
{
return adoptRef(new BidiContext(level, direction, override, parent));
}
PassRefPtr<BidiContext> BidiContext::create(unsigned char level, Direction direction, bool override, BidiContext* parent)
{
ASSERT(direction == (level % 2 ? RightToLeft : LeftToRight));
if (parent)
return createUncached(level, direction, override, parent);
ASSERT(level <= 1);
if (!level) {
if (!override) {
static BidiContext* ltrContext = createUncached(0, LeftToRight, false, 0).releaseRef();
return ltrContext;
}
static BidiContext* ltrOverrideContext = createUncached(0, LeftToRight, true, 0).releaseRef();
return ltrOverrideContext;
}
if (!override) {
static BidiContext* rtlContext = createUncached(1, RightToLeft, false, 0).releaseRef();
return rtlContext;
}
static BidiContext* rtlOverrideContext = createUncached(1, RightToLeft, true, 0).releaseRef();
return rtlOverrideContext;
}
bool operator==(const BidiContext& c1, const BidiContext& c2)
{
if (&c1 == &c2)
return true;
if (c1.level() != c2.level() || c1.override() != c2.override() || c1.dir() != c2.dir())
return false;
if (!c1.parent())
return !c2.parent();
return c2.parent() && *c1.parent() == *c2.parent();
}
} // namespace WebCore
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