projects / iphone-api.git / blame
| Commit | Line | Data |
|---|---|---|
| a90939db JF |
1 | /* |
| 2 | * Copyright (C) 2000 Lars Knoll (knoll@kde.org) | |
| 3 | * Copyright (C) 2003, 2004, 2006, 2007 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/RefPtr.h> | |
| 27 | #include <wtf/unicode/Unicode.h> | |
| 28 | ||
| 29 | namespace WebCore { | |
| 30 | ||
| 31 | // Used to keep track of explicit embeddings. | |
| 32 | class BidiContext { | |
| 33 | public: | |
| 34 | BidiContext(unsigned char level, WTF::Unicode::Direction direction, bool override = false, BidiContext* parent = 0) | |
| 35 | : m_level(level) | |
| 36 | , m_direction(direction) | |
| 37 | , m_override(override) | |
| 38 | , m_parent(parent) | |
| 39 | , m_refCount(0) | |
| 40 | { | |
| 41 | ASSERT(direction == WTF::Unicode::LeftToRight || direction == WTF::Unicode::RightToLeft); | |
| 42 | } | |
| 43 | ||
| 44 | void ref() const { m_refCount++; } | |
| 45 | void deref() const | |
| 46 | { | |
| 47 | m_refCount--; | |
| 48 | if (m_refCount <= 0) | |
| 49 | delete this; | |
| 50 | } | |
| 51 | ||
| 52 | BidiContext* parent() const { return m_parent.get(); } | |
| 53 | unsigned char level() const { return m_level; } | |
| 54 | WTF::Unicode::Direction dir() const { return static_cast<WTF::Unicode::Direction>(m_direction); } | |
| 55 | bool override() const { return m_override; } | |
| 56 | ||
| 57 | private: | |
| 58 | unsigned char m_level; | |
| 59 | unsigned m_direction : 5; // Direction | |
| 60 | bool m_override : 1; | |
| 61 | RefPtr<BidiContext> m_parent; | |
| 62 | mutable int m_refCount; | |
| 63 | }; | |
| 64 | ||
| 65 | bool operator==(const BidiContext&, const BidiContext&); | |
| 66 | ||
| 67 | } // namespace WebCore | |
| 68 | ||
| 69 | #endif // BidiContext_h |