| /* |
| * 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 |