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