/* | |
* 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; | |
} | |
} |