render_list.cpp

khtml在gtk上的移植版本

// -----------------------------------------------------------

RenderListMarker::RenderListMarker(DocumentImpl* document)
    : RenderBox(document), m_listImage(0), m_value(-1)
{
    // init RenderObject attributes
    setInline(true);   // our object is Inline
    setReplaced(true); // pretend to be replaced
    // val = -1;
    // m_listImage = 0;
}

RenderListMarker::~RenderListMarker()
{
    if(m_listImage)
        m_listImage->deref(this);
}

void RenderListMarker::setStyle(RenderStyle *s)
{
    if ( s && style() && s->listStylePosition() != style()->listStylePosition() )
        setNeedsLayoutAndMinMaxRecalc();
    
    RenderBox::setStyle(s);

    if ( m_listImage != style()->listStyleImage() ) {
	if(m_listImage)  m_listImage->deref(this);
	m_listImage = style()->listStyleImage();
	if(m_listImage)  m_listImage->ref(this);
    }
}


void RenderListMarker::paint(PaintInfo& i, int _tx, int _ty)
{
    if (i.phase != PaintActionForeground)
        return;
    
    if (style()->visibility() != VISIBLE)  return;

    _tx += m_x;
    _ty += m_y;

    if ((_ty > i.r.y() + i.r.height()) || (_ty + m_height < i.r.y()))
        return;

    if (shouldPaintBackgroundOrBorder()) 
        paintBoxDecorations(i, _tx, _ty);

#ifdef DEBUG_LAYOUT
    kdDebug( 6040 ) << nodeName().string() << "(ListMarker)::paintObject(" << _tx << ", " << _ty << ")" << endl;
#endif

    QPainter* p = i.p;
    p->setFont(style()->font());
    const QFontMetrics fm = p->fontMetrics();
    int offset = fm.ascent()*2/3;

    // The marker needs to adjust its tx, for the case where it's an outside marker.
    RenderObject* listItem = 0;
    int leftLineOffset = 0;
    int rightLineOffset = 0;
    if (!isInside()) {
        listItem = this;
        int yOffset = 0;
        int xOffset = 0;
        while (listItem && listItem != m_listItem) {
            yOffset += listItem->yPos();
            xOffset += listItem->xPos();
            listItem = listItem->parent();
        }
        
        // Now that we have our xoffset within the listbox, we need to adjust ourselves by the delta
        // between our current xoffset and our desired position (which is just outside the border box
        // of the list item).
        if (style()->direction() == LTR) {
            leftLineOffset = m_listItem->leftRelOffset(yOffset, m_listItem->leftOffset(yOffset));
            _tx -= (xOffset - leftLineOffset) + m_listItem->paddingLeft() + m_listItem->borderLeft();
        }
        else {
            rightLineOffset = m_listItem->rightRelOffset(yOffset, m_listItem->rightOffset(yOffset));
            _tx += (rightLineOffset-xOffset) + m_listItem->paddingRight() + m_listItem->borderRight();
        }
    }

    bool isPrinting = (p->device()->devType() == QInternal::Printer);
    if (isPrinting)
    {
        if (_ty < i.r.y())
        {
            // This has been printed already we suppose.
            return;
        }
        if (_ty + m_height + paddingBottom() + borderBottom() >= i.r.y() + i.r.height())
        {
            RenderCanvas *rootObj = canvas();
            if (_ty < rootObj->truncatedAt())
#if APPLE_CHANGES && !KWIQ // besttruncated not in atm
                rootObj->setBestTruncatedAt(_ty, this);
#else
                rootObj->setTruncatedAt(_ty);
#endif
            // Let's print this on the next page.
            return; 
        }
    }
    

    int xoff = 0;
    int yoff = fm.ascent() - offset;

    if (!isInside())
        if (listItem->style()->direction() == LTR)
            xoff = -7 - offset;
        else 
            xoff = offset;
        
            
    if ( m_listImage && !m_listImage->isErrorImage()) {
        // For OUTSIDE bullets shrink back to only a 0.3em margin. 0.67 em is too
        // much.  This brings the margin back to MacIE/Gecko/WinIE levels.  
        // For LTR don't forget to add in the width of the image to the offset as
        // well (you are moving the image left, so you have to also add in the width
        // of the image's border box as well). -dwh
        if (!isInside()) {
            if (style()->direction() == LTR)
                xoff -= m_listImage->pixmap().width() - fm.ascent()*1/3;
            else
                xoff -= fm.ascent()*1/3;
        }
        
        p->drawPixmap( QPoint( _tx + xoff, _ty ), m_listImage->pixmap());
        return;
    }

#ifdef BOX_DEBUG
    p->setPen( Qt::red );
    p->drawRect( _tx + xoff, _ty + yoff, offset, offset );
#endif

    const QColor color( style()->color() );
    p->setPen( color );

    switch(style()->listStyleType()) {
    case DISC:
        p->setBrush( color );
        p->drawEllipse( _tx + xoff, _ty + (3 * yoff)/2, (offset>>1)+1, (offset>>1)+1 );
        return;
    case CIRCLE:
        p->setBrush( Qt::NoBrush );
        p->drawEllipse( _tx + xoff, _ty + (3 * yoff)/2, (offset>>1)+1, (offset>>1)+1 );
        return;
    case SQUARE:
        p->setBrush( color );
        p->drawRect( _tx + xoff, _ty + (3 * yoff)/2, (offset>>1)+1, (offset>>1)+1 );
        return;
    case LNONE:
        return;
    default:
        if (!m_item.isEmpty()) {
#if APPLE_CHANGES
            // Text should be drawn on the baseline, so we add in the ascent of the font. 
            // For some inexplicable reason, this works in Konqueror.  I'm not sure why.
            // - dwh
       	    _ty += fm.ascent();
#else
       	    //_ty += fm.ascent() - fm.height()/2 + 1;
#endif
            if (isInside()) {
            	if( style()->direction() == LTR)
                    p->drawText(_tx, _ty, 0, 0, Qt::AlignLeft|Qt::DontClip, m_item);
            	else
            	    p->drawText(_tx, _ty, 0, 0, Qt::AlignRight|Qt::DontClip, m_item);
            } else {
                if(style()->direction() == LTR)
            	    p->drawText(_tx-offset/2, _ty, 0, 0, Qt::AlignRight|Qt::DontClip, m_item);
            	else
            	    p->drawText(_tx+offset/2, _ty, 0, 0, Qt::AlignLeft|Qt::DontClip, m_item);
            }
        }
    }
}

void RenderListMarker::layout()
{
    KHTMLAssert( needsLayout() );
    // ### KHTMLAssert( minMaxKnown() );
    if ( !minMaxKnown() )
	calcMinMaxWidth();
    setNeedsLayout(false);
}

void RenderListMarker::setPixmap( const QPixmap &p, const QRect& r, CachedImage *o)
{
    if(o != m_listImage) {
        RenderBox::setPixmap(p, r, o);
        return;
    }

    if (m_width != m_listImage->pixmap_size().width() || m_height != m_listImage->pixmap_size().height())
        setNeedsLayoutAndMinMaxRecalc();
    else
        repaint();
}

void RenderListMarker::calcMinMaxWidth()
{
    KHTMLAssert( !minMaxKnown() );

    m_width = 0;

    if(m_listImage) {
        if (isInside())
            m_width = m_listImage->pixmap().width() + 5;
        m_height = m_listImage->pixmap().height();
        m_minWidth = m_maxWidth = m_width;
        setMinMaxKnown();
        return;
    }

    if (m_value < 0) // not yet calculated
        m_listItem->calcListValue();

    const QFontMetrics &fm = style()->fontMetrics();
    m_height = fm.ascent();

    switch(style()->listStyleType())
    {
    case DISC:
    case CIRCLE:
    case SQUARE:
        if (isInside()) {
            m_width = m_height; //fm.ascent();
        }
    	goto end;
    case ARMENIAN:
    case GEORGIAN:
    case CJK_IDEOGRAPHIC:
    case HIRAGANA:
    case KATAKANA:
    case HIRAGANA_IROHA:
    case KATAKANA_IROHA:
    case DECIMAL_LEADING_ZERO:
        // ### unsupported, we use decimal instead
    case LDECIMAL:
        m_item.sprintf( "%ld", m_value );
        break;
    case LOWER_ROMAN:
        m_item = toRoman( m_value, false );
        break;
    case UPPER_ROMAN:
        m_item = toRoman( m_value, true );
        break;
    case LOWER_GREEK:
     {
    	int number = m_value - 1;
      	int l = (number % 24);

	if (l>16) {l++;} // Skip GREEK SMALL LETTER FINAL SIGMA

   	m_item = QChar(945 + l);
    	for (int i = 0; i < (number / 24); i++) {
       	    m_item += QString::fromLatin1("'");
    	}
	break;
     }
    case HEBREW:
     	m_item = toHebrew( m_value );
	break;
    case LOWER_ALPHA:
    case LOWER_LATIN:
        m_item = toLetter( m_value, 'a' );
        break;
    case UPPER_ALPHA:
    case UPPER_LATIN:
        m_item = toLetter( m_value, 'A' );
        break;
    case LNONE:
        break;
    }

    m_item += QString::fromLatin1(". ");

    if (isInside())
        m_width = fm.width(m_item);

end:

    m_minWidth = m_width;
    m_maxWidth = m_width;

    setMinMaxKnown();
}

void RenderListMarker::calcWidth()
{
    RenderBox::calcWidth();
}

short RenderListMarker::lineHeight(bool, bool) const
{
    return height();
}

short RenderListMarker::baselinePosition(bool, bool) const
{
    return height();
}

bool RenderListMarker::isInside() const
{
    return m_listItem->notInList() || style()->listStylePosition() == INSIDE;
}

#undef BOX_DEBUG