1 /* 2 * Copyright (C) 2000 Lars Knoll (knoll (at) kde.org) 3 * Copyright (C) 2003, 2004, 2006, 2007, 2009 Apple Inc. All right reserved. 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Library General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Library General Public License for more details. 14 * 15 * You should have received a copy of the GNU Library General Public License 16 * along with this library; see the file COPYING.LIB. If not, write to 17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 18 * Boston, MA 02110-1301, USA. 19 * 20 */ 21 22 #ifndef BidiContext_h 23 #define BidiContext_h 24 25 #include <wtf/Assertions.h> 26 #include <wtf/PassRefPtr.h> 27 #include <wtf/RefCounted.h> 28 #include <wtf/RefPtr.h> 29 #include <wtf/unicode/Unicode.h> 30 31 namespace WebCore { 32 33 // Used to keep track of explicit embeddings. 34 class BidiContext : public RefCounted<BidiContext> { 35 public: 36 static PassRefPtr<BidiContext> create(unsigned char level, WTF::Unicode::Direction direction, bool override = false, BidiContext* parent = 0); 37 38 BidiContext* parent() const { return m_parent.get(); } 39 unsigned char level() const { return m_level; } 40 WTF::Unicode::Direction dir() const { return static_cast<WTF::Unicode::Direction>(m_direction); } 41 bool override() const { return m_override; } 42 43 private: 44 BidiContext(unsigned char level, WTF::Unicode::Direction direction, bool override, BidiContext* parent) 45 : m_level(level) 46 , m_direction(direction) 47 , m_override(override) 48 , m_parent(parent) 49 { 50 } 51 52 unsigned char m_level; 53 unsigned m_direction : 5; // Direction 54 bool m_override : 1; 55 RefPtr<BidiContext> m_parent; 56 }; 57 58 bool operator==(const BidiContext&, const BidiContext&); 59 60 } // namespace WebCore 61 62 #endif // BidiContext_h 63
