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/*
* This file is part of the html renderer for KDE.
*
* Copyright (C) 2000 Lars Knoll (knoll@kde.org)
* Copyright (C) 2003 Apple Computer, 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 BIDI_H
#define BIDI_H
#include <qstring.h>
namespace khtml {
class RenderArena;
class RenderBlock;
class RenderObject;
class InlineBox;
class BidiContext {
public:
BidiContext(unsigned char level, QChar::Direction embedding, BidiContext *parent = 0, bool override = false);
~BidiContext();
void ref() const;
void deref() const;
unsigned char level;
bool override : 1;
QChar::Direction dir : 5;
QChar::Direction basicDir : 5;
BidiContext *parent;
// refcounting....
mutable int count;
};
struct BidiRun {
BidiRun(int _start, int _stop, RenderObject *_obj, BidiContext *context, QChar::Direction dir)
: start( _start ), stop( _stop ), obj( _obj ), box(0), nextRun(0)
{
if(dir == QChar::DirON) dir = context->dir;
level = context->level;
// add level of run (cases I1 & I2)
if( level % 2 ) {
if(dir == QChar::DirL || dir == QChar::DirAN || dir == QChar::DirEN)
level++;
} else {
if( dir == QChar::DirR )
level++;
else if( dir == QChar::DirAN || dir == QChar::DirEN)
level += 2;
}
}
void detach(RenderArena* renderArena);
// Overloaded new operator.
void* operator new(size_t sz, RenderArena* renderArena) throw();
// Overridden to prevent the normal delete from being called.
void operator delete(void* ptr, size_t sz);
private:
// The normal operator new is disallowed.
void* operator new(size_t sz) throw();
public:
int start;
int stop;
RenderObject *obj;
InlineBox* box;
// explicit + implicit levels here
uchar level;
bool compact : 1;
BidiRun* nextRun;
};
struct BidiIterator;
struct BidiState;
}
#endif
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