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/*
* Copyright (C) 2006 Lars Knoll <lars@trolltech.com>
*
* 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.
*
*/
#include "config.h"
#include "TextBreakIterator.h"
#include <QtCore/qtextboundaryfinder.h>
#include <qdebug.h>
// #define DEBUG_TEXT_ITERATORS
#ifdef DEBUG_TEXT_ITERATORS
#define DEBUG qDebug
#else
#define DEBUG if (1) {} else qDebug
#endif
namespace WebCore {
static unsigned char buffer[1024];
class TextBreakIterator : public QTextBoundaryFinder {
public:
TextBreakIterator(QTextBoundaryFinder::BoundaryType type, const UChar* string, int length)
: QTextBoundaryFinder(type, (const QChar*)string, length, buffer, sizeof(buffer))
, length(length)
, string(string) {}
TextBreakIterator()
: QTextBoundaryFinder()
, length(0)
, string(0) {}
int length;
const UChar* string;
};
TextBreakIterator* setUpIterator(TextBreakIterator& iterator, QTextBoundaryFinder::BoundaryType type, const UChar* string, int length)
{
if (!string || !length)
return 0;
if (iterator.isValid() && type == iterator.type() && length == iterator.length
&& memcmp(string, iterator.string, length) == 0) {
iterator.toStart();
return &iterator;
}
iterator = TextBreakIterator(type, string, length);
return &iterator;
}
TextBreakIterator* wordBreakIterator(const UChar* string, int length)
{
static TextBreakIterator staticWordBreakIterator;
return setUpIterator(staticWordBreakIterator, QTextBoundaryFinder::Word, string, length);
}
TextBreakIterator* characterBreakIterator(const UChar* string, int length)
{
static TextBreakIterator staticCharacterBreakIterator;
return setUpIterator(staticCharacterBreakIterator, QTextBoundaryFinder::Grapheme, string, length);
}
TextBreakIterator* cursorMovementIterator(const UChar* string, int length)
{
return characterBreakIterator(string, length);
}
TextBreakIterator* lineBreakIterator(const UChar* string, int length)
{
static TextBreakIterator staticLineBreakIterator;
return setUpIterator(staticLineBreakIterator, QTextBoundaryFinder::Line, string, length);
}
TextBreakIterator* sentenceBreakIterator(const UChar* string, int length)
{
static TextBreakIterator staticSentenceBreakIterator;
return setUpIterator(staticSentenceBreakIterator, QTextBoundaryFinder::Sentence, string, length);
}
int textBreakFirst(TextBreakIterator* bi)
{
bi->toStart();
DEBUG() << "textBreakFirst" << bi->position();
return bi->position();
}
int textBreakNext(TextBreakIterator* bi)
{
int pos = bi->toNextBoundary();
DEBUG() << "textBreakNext" << pos;
return pos;
}
int textBreakPreceding(TextBreakIterator* bi, int pos)
{
bi->setPosition(pos);
int newpos = bi->toPreviousBoundary();
DEBUG() << "textBreakPreceding" << pos << newpos;
return newpos;
}
int textBreakFollowing(TextBreakIterator* bi, int pos)
{
bi->setPosition(pos);
int newpos = bi->toNextBoundary();
DEBUG() << "textBreakFollowing" << pos << newpos;
return newpos;
}
int textBreakCurrent(TextBreakIterator* bi)
{
return bi->position();
}
bool isTextBreak(TextBreakIterator*, int)
{
return true;
}
}
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