TextBreakIteratorQt.cpp [plain text]
#include "TextBreakIterator.h"
#include <qtextlayout.h>
namespace WebCore {
class TextBreakIterator
{
public:
virtual int first() = 0;
virtual int next() = 0;
virtual int previous() = 0;
inline int following(int pos) {
currentPos = pos;
return next();
}
inline int preceding(int pos) {
currentPos = pos;
return previous();
}
int currentPos;
const UChar *string;
int length;
};
class WordBreakIteratorQt : public TextBreakIterator
{
public:
virtual int first();
virtual int next();
virtual int previous();
};
class CharBreakIteratorQt : public TextBreakIterator
{
public:
virtual int first();
virtual int next();
virtual int previous();
QTextLayout layout;
};
int WordBreakIteratorQt::first() {
currentPos = 0;
return currentPos;
}
int WordBreakIteratorQt::next() {
if (currentPos == length) {
currentPos = -1;
return currentPos;
}
bool haveSpace = false;
while (currentPos < length) {
if (haveSpace && !QChar(string[currentPos]).isSpace())
break;
if (QChar(string[currentPos]).isSpace())
haveSpace = true;
++currentPos;
}
return currentPos;
}
int WordBreakIteratorQt::previous() {
if (currentPos == 0) {
currentPos = -1;
return currentPos;
}
bool haveSpace = false;
while (currentPos > 0) {
if (haveSpace && !QChar(string[currentPos]).isSpace())
break;
if (QChar(string[currentPos]).isSpace())
haveSpace = true;
--currentPos;
}
return currentPos;
}
int CharBreakIteratorQt::first() {
currentPos = 0;
return currentPos;
}
int CharBreakIteratorQt::next() {
if (currentPos == length)
return -1;
currentPos = layout.nextCursorPosition(currentPos);
return currentPos;
}
int CharBreakIteratorQt::previous() {
if (currentPos == 0)
return -1;
currentPos = layout.previousCursorPosition(currentPos);
return currentPos;
}
TextBreakIterator* wordBreakIterator(const UChar* string, int length)
{
static WordBreakIteratorQt *iterator = 0;
if (!iterator)
iterator = new WordBreakIteratorQt;
iterator->string = string;
iterator->length = length;
iterator->currentPos = 0;
return iterator;
}
TextBreakIterator* characterBreakIterator(const UChar* string, int length)
{
static CharBreakIteratorQt *iterator = 0;
if (!iterator)
iterator = new CharBreakIteratorQt;
iterator->string = string;
iterator->length = length;
iterator->currentPos = 0;
iterator->layout.setText(QString(reinterpret_cast<const QChar*>(string), length));
return iterator;
}
TextBreakIterator* lineBreakIterator(const UChar*, int)
{
return 0;
}
TextBreakIterator* sentenceBreakIterator(const UChar*, int)
{
return 0;
}
int textBreakFirst(TextBreakIterator* bi)
{
return bi->first();
}
int textBreakNext(TextBreakIterator* bi)
{
return bi->next();
}
int textBreakPreceding(TextBreakIterator* bi, int pos)
{
return bi->preceding(pos);
}
int textBreakFollowing(TextBreakIterator* bi, int pos)
{
return bi->following(pos);
}
int textBreakCurrent(TextBreakIterator* bi)
{
return bi->currentPos;
}
bool isTextBreak(TextBreakIterator*, int)
{
return true;
}
}