109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)/* 209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * Copyright (C) 2000 Lars Knoll (knoll@kde.org) 309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * Copyright (C) 2003, 2004, 2006, 2007, 2008 Apple Inc. All right reserved. 409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * 509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * This library is free software; you can redistribute it and/or 609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * modify it under the terms of the GNU Library General Public 709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * License as published by the Free Software Foundation; either 809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * version 2 of the License, or (at your option) any later version. 909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * 1009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * This library is distributed in the hope that it will be useful, 1109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * but WITHOUT ANY WARRANTY; without even the implied warranty of 1209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 1309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * Library General Public License for more details. 1409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * 1509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * You should have received a copy of the GNU Library General Public License 1609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * along with this library; see the file COPYING.LIB. If not, write to 1709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 1809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * Boston, MA 02110-1301, USA. 1909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * 2009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) */ 2109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 2209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)#ifndef BidiCharacterRun_h 2309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)#define BidiCharacterRun_h 2409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 2509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)#include "platform/text/BidiContext.h" 2609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)#include "platform/text/TextDirection.h" 2709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 28c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)namespace blink { 2909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 3009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)struct BidiCharacterRun { 3109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) BidiCharacterRun(int start, int stop, BidiContext* context, WTF::Unicode::Direction dir) 3209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) : m_override(context->override()) 3309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) , m_next(0) 3409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) , m_start(start) 3509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) , m_stop(stop) 3609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) { 3709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) ASSERT(m_start <= m_stop); 3809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (dir == WTF::Unicode::OtherNeutral) 3909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) dir = context->dir(); 4009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 4109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) m_level = context->level(); 4209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 4309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // add level of run (cases I1 & I2) 4409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (m_level % 2) { 4509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (dir == WTF::Unicode::LeftToRight || dir == WTF::Unicode::ArabicNumber || dir == WTF::Unicode::EuropeanNumber) 4609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) m_level++; 4709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } else { 4809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (dir == WTF::Unicode::RightToLeft) 4909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) m_level++; 5009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) else if (dir == WTF::Unicode::ArabicNumber || dir == WTF::Unicode::EuropeanNumber) 5109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) m_level += 2; 5209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } 5309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } 5409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 5509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // BidiCharacterRun are allocated out of the rendering partition. 5609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) PLATFORM_EXPORT void* operator new(size_t); 5709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) PLATFORM_EXPORT void operator delete(void*); 5809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 5909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) int start() const { return m_start; } 6009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) int stop() const { return m_stop; } 6109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) unsigned char level() const { return m_level; } 6209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) bool reversed(bool visuallyOrdered) const { return m_level % 2 && !visuallyOrdered; } 6309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) bool dirOverride(bool visuallyOrdered) { return m_override || visuallyOrdered; } 6409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) TextDirection direction() const { return reversed(false) ? RTL : LTR; } 6509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 6609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) BidiCharacterRun* next() const { return m_next; } 6709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) void setNext(BidiCharacterRun* next) { m_next = next; } 6809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 6909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // Do not add anything apart from bitfields until after m_next. See https://bugs.webkit.org/show_bug.cgi?id=100173 7009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) bool m_override : 1; 7109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) bool m_hasHyphen : 1; // Used by BidiRun subclass which is a layering violation but enables us to save 8 bytes per object on 64-bit. 7209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) unsigned char m_level; 7309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) BidiCharacterRun* m_next; 7409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) int m_start; 7509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) int m_stop; 7609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)}; 7709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 78c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)} // namespace blink 7909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 8009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)#endif // BidiCharacterRun_h 81