q3richtext.cpp

奇趣公司比较新的qt/emd版本

    return ok;
}

void Q3TextCursor::gotoRight()
{
    if (para->string()->isRightToLeft())
        gotoPreviousLetter();
    else
        gotoNextLetter();
}

void Q3TextCursor::gotoNextLetter()
{
   tmpX = -1;

#ifndef QT_NO_TEXTCUSTOMITEM
    const Q3TextStringChar *tsc = para->at(idx);
    if (tsc && tsc->isCustom() && tsc->customItem()->isNested()) {
        if (processNesting(EnterBegin))
            return;
    }
#endif

    if (idx < para->length() - 1) {
        idx = para->string()->nextCursorPosition(idx);
    } else if (para->next()) {
        para = para->next();
        while (!para->isVisible() && para->next())
            para = para->next();
        idx = 0;
    } else if (nestedDepth()) {
        pop();
        processNesting(Next);
        if (idx == -1) {
            pop();
            if (idx < para->length() - 1) {
                idx = para->string()->nextCursorPosition(idx);
            } else if (para->next()) {
                para = para->next();
                idx = 0;
            }
        }
    }
}

void Q3TextCursor::gotoUp()
{
    int indexOfLineStart;
    int line;
    Q3TextStringChar *c = para->lineStartOfChar(idx, &indexOfLineStart, &line);
    if (!c)
        return;

    if (tmpX < 0)
        tmpX = x();

    if (indexOfLineStart == 0) {
        if (!para->prev()) {
            if (!nestedDepth())
                return;
            pop();
            processNesting(Up);
            if (idx == -1) {
                pop();
                if (!para->prev())
                    return;
                idx = tmpX = 0;
            } else {
                tmpX = -1;
                return;
            }
        }
        Q3TextParagraph *p = para->prev();
        while (p && !p->isVisible())
            p = p->prev();
        if (p)
            para = p;
        int lastLine = para->lines() - 1;
        if (!para->lineStartOfLine(lastLine, &indexOfLineStart))
            return;
        idx = indexOfLineStart;
        while (idx < para->length()-1 && para->at(idx)->x < tmpX)
            ++idx;
        if (idx > indexOfLineStart &&
            para->at(idx)->x - tmpX > tmpX - para->at(idx-1)->x)
            --idx;
    } else {
        --line;
        int oldIndexOfLineStart = indexOfLineStart;
        if (!para->lineStartOfLine(line, &indexOfLineStart))
            return;
        idx = indexOfLineStart;
        while (idx < oldIndexOfLineStart-1 && para->at(idx)->x < tmpX)
            ++idx;
        if (idx > indexOfLineStart &&
            para->at(idx)->x - tmpX > tmpX - para->at(idx-1)->x)
            --idx;
    }
    fixCursorPosition();
}

void Q3TextCursor::gotoDown()
{
    int indexOfLineStart;
    int line;
    Q3TextStringChar *c = para->lineStartOfChar(idx, &indexOfLineStart, &line);
    if (!c)
        return;

    if (tmpX < 0)
        tmpX = x();

    if (line == para->lines() - 1) {
        if (!para->next()) {
            if (!nestedDepth())
                return;
            pop();
            processNesting(Down);
            if (idx == -1) {
                pop();
                if (!para->next())
                    return;
                idx = tmpX = 0;
            } else {
                tmpX = -1;
                return;
            }
        }
        Q3TextParagraph *s = para->next();
        while (s && !s->isVisible())
            s = s->next();
        if (s)
            para = s;
        if (!para->lineStartOfLine(0, &indexOfLineStart))
            return;
        int end;
        if (para->lines() == 1)
            end = para->length();
        else
            para->lineStartOfLine(1, &end);

        idx = indexOfLineStart;
        while (idx < end-1 && para->at(idx)->x < tmpX)
            ++idx;
        if (idx > indexOfLineStart &&
            para->at(idx)->x - tmpX > tmpX - para->at(idx-1)->x)
            --idx;
    } else {
        ++line;
        int end;
        if (line == para->lines() - 1)
            end = para->length();
        else
            para->lineStartOfLine(line + 1, &end);
        if (!para->lineStartOfLine(line, &indexOfLineStart))
            return;
        idx = indexOfLineStart;
        while (idx < end-1 && para->at(idx)->x < tmpX)
            ++idx;
        if (idx > indexOfLineStart &&
            para->at(idx)->x - tmpX > tmpX - para->at(idx-1)->x)
            --idx;
    }
    fixCursorPosition();
}

void Q3TextCursor::gotoLineEnd()
{
    tmpX = -1;
    int indexOfLineStart;
    int line;
    Q3TextStringChar *c = para->lineStartOfChar(idx, &indexOfLineStart, &line);
    if (!c)
        return;

    if (line == para->lines() - 1) {
        idx = para->length() - 1;
    } else {
        c = para->lineStartOfLine(++line, &indexOfLineStart);
        indexOfLineStart--;
        idx = indexOfLineStart;
    }
}

void Q3TextCursor::gotoLineStart()
{
    tmpX = -1;
    int indexOfLineStart;
    int line;
    Q3TextStringChar *c = para->lineStartOfChar(idx, &indexOfLineStart, &line);
    if (!c)
        return;

    idx = indexOfLineStart;
}

void Q3TextCursor::gotoHome()
{
    if (topParagraph()->document())
        gotoPosition(topParagraph()->document()->firstParagraph());
    else
        gotoLineStart();
}

void Q3TextCursor::gotoEnd()
{
    if (topParagraph()->document() && topParagraph()->document()->lastParagraph()->isValid())
        gotoPosition(topParagraph()->document()->lastParagraph(),
                      topParagraph()->document()->lastParagraph()->length() - 1);
    else
        gotoLineEnd();
}

void Q3TextCursor::gotoPageUp(int visibleHeight)
{
    int targetY  = globalY() - visibleHeight;
    Q3TextParagraph* old; int index;
    do {
        old = para; index = idx;
        gotoUp();
    } while ((old != para || index != idx)  && globalY() > targetY);
}

void Q3TextCursor::gotoPageDown(int visibleHeight)
{
    int targetY  = globalY() + visibleHeight;
    Q3TextParagraph* old; int index;
    do {
        old = para; index = idx;
        gotoDown();
    } while ((old != para || index != idx) && globalY() < targetY);
}

void Q3TextCursor::gotoWordRight()
{
    if (para->string()->isRightToLeft())
        gotoPreviousWord();
    else
        gotoNextWord();
}

void Q3TextCursor::gotoWordLeft()
{
    if (para->string()->isRightToLeft())
        gotoNextWord();
    else
        gotoPreviousWord();
}

static bool is_seperator(const QChar &c, bool onlySpace)
{
    if (onlySpace)
        return c.isSpace();
    return c.isSpace() ||
           c == QLatin1Char('\t') ||
           c == QLatin1Char('.') ||
           c == QLatin1Char(',') ||
           c == QLatin1Char(':') ||
           c == QLatin1Char(';') ||
           c == QLatin1Char('-') ||
           c == QLatin1Char('<') ||
           c == QLatin1Char('>') ||
           c == QLatin1Char('[') ||
           c == QLatin1Char(']') ||
           c == QLatin1Char('(') ||
           c == QLatin1Char(')') ||
           c == QLatin1Char('{') ||
           c == QLatin1Char('}');
}

void Q3TextCursor::gotoPreviousWord(bool onlySpace)
{
    gotoPreviousLetter();
    tmpX = -1;
    Q3TextString *s = para->string();
    bool allowSame = false;
    if (idx == ((int)s->length()-1))
        return;
    for (int i = idx; i >= 0; --i) {
        if (is_seperator(s->at(i).c, onlySpace)) {
            if (!allowSame)
                continue;
            idx = i + 1;
            return;
        }
        if (!allowSame && !is_seperator(s->at(i).c, onlySpace))
            allowSame = true;
    }
    idx = 0;
}

void Q3TextCursor::gotoNextWord(bool onlySpace)
{
    tmpX = -1;
    Q3TextString *s = para->string();
    bool allowSame = false;
    for (int i = idx; i < (int)s->length(); ++i) {
        if (!is_seperator(s->at(i).c, onlySpace)) {
            if (!allowSame)
                continue;
            idx = i;
            return;
        }
        if (!allowSame && is_seperator(s->at(i).c, onlySpace))
            allowSame = true;

    }

    if (idx < ((int)s->length()-1)) {
        gotoLineEnd();
    } else if (para->next()) {
        Q3TextParagraph *p = para->next();
        while (p  && !p->isVisible())
            p = p->next();
        if (s) {
            para = p;
            idx = 0;
        }
    } else {
        gotoLineEnd();
    }
}

bool Q3TextCursor::atParagStart()
{
    return idx == 0;
}

bool Q3TextCursor::atParagEnd()
{
    return idx == para->length() - 1;
}

void Q3TextCursor::splitAndInsertEmptyParagraph(bool ind, bool updateIds)
{
    if (!para->document())
        return;
    tmpX = -1;
    Q3TextFormat *f = 0;
    if (para->document()->useFormatCollection()) {
        f = para->at(idx)->format();
        if (idx == para->length() - 1 && idx > 0)
            f = para->at(idx - 1)->format();
        if (f->isMisspelled()) {
            f->removeRef();
            f = para->document()->formatCollection()->format(f->font(), f->color());
        }
    }

    if (atParagEnd()) {
        Q3TextParagraph *n = para->next();
        Q3TextParagraph *s = para->document()->createParagraph(para->document(), para, n, updateIds);
        if (f)
            s->setFormat(0, 1, f, true);
        s->copyParagData(para);
        if (ind) {
            int oi, ni;
            s->indent(&oi, &ni);
            para = s;
            idx = ni;
        } else {
            para = s;
            idx = 0;
        }
    } else if (atParagStart()) {
        Q3TextParagraph *p = para->prev();
        Q3TextParagraph *s = para->document()->createParagraph(para->document(), p, para, updateIds);
        if (f)
            s->setFormat(0, 1, f, true);
        s->copyParagData(para);
        if (ind) {
            s->indent();
            s->format();
            indent();
            para->format();
        }
    } else {
        QString str = para->string()->toString().mid(idx, 0xFFFFFF);
        Q3TextParagraph *n = para->next();
        Q3TextParagraph *s = para->document()->createParagraph(para->document(), para, n, updateIds);
        s->copyParagData(para);
        s->remove(0, 1);
        s->append(str, true);
        for (int i = 0; i < str.length(); ++i) {
            Q3TextStringChar* tsc = para->at(idx + i);
            s->setFormat(i, 1, tsc->format(), true);
#ifndef QT_NO_TEXTCUSTOMITEM
            if (tsc->isCustom()) {
                Q3TextCustomItem * item = tsc->customItem();
                s->at(i)->setCustomItem(item);
                tsc->loseCustomItem();
            }
#endif
            if (tsc->isAnchor())
                s->at(i)->setAnchor(tsc->anchorName(),
                                       tsc->anchorHref());
        }
        para->truncate(idx);
        if (ind) {
            int oi, ni;
            s->indent(&oi, &ni);
            para = s;
            idx = ni;
        } else {