/*
* Copyright (C) 2000 Lars Knoll (knoll@kde.org)
* Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All right reserved.
* Copyright (C) 2010 Google Inc. All rights reserved.
* Copyright (C) 2014 Adobe Systems Inc.
*
* 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.
*
*/
#ifndef TrailingObjects_h
#define TrailingObjects_h
#include "wtf/Vector.h"
namespace WebCore {
class InlineIterator;
class RenderBox;
class RenderText;
struct BidiRun;
template <class Iterator, class Run> class BidiResolver;
template <class Iterator> class MidpointState;
typedef BidiResolver<InlineIterator, BidiRun> InlineBidiResolver;
typedef MidpointState<InlineIterator> LineMidpointState;
class TrailingObjects {
public:
TrailingObjects()
: m_whitespace(0)
{
}
void setTrailingWhitespace(RenderText* whitespace)
{
ASSERT(whitespace);
m_whitespace = whitespace;
}
void clear()
{
m_whitespace = 0;
// Using resize(0) rather than clear() here saves 2% on
// PerformanceTests/Layout/line-layout.html because we avoid freeing and
// re-allocating the underlying buffer repeatedly.
m_boxes.resize(0);
}
void appendBoxIfNeeded(RenderBox* box)
{
if (m_whitespace)
m_boxes.append(box);
}
enum CollapseFirstSpaceOrNot { DoNotCollapseFirstSpace, CollapseFirstSpace };
void updateMidpointsForTrailingBoxes(LineMidpointState&, const InlineIterator& lBreak, CollapseFirstSpaceOrNot);
private:
RenderText* m_whitespace;
Vector<RenderBox*, 4> m_boxes;
};
}
#endif // TrailingObjects_h