コード例 #1
0
void InlineFlowBox::paintBackground(QPainter* p, const QColor& c, const BackgroundLayer* bgLayer,
                                    int my, int mh, int _tx, int _ty, int w, int h)
{
    CachedImage* bg = bgLayer->backgroundImage();
    bool hasBackgroundImage = bg && (bg->pixmap_size() == bg->valid_rect().size()) &&
                              !bg->isTransparent() && !bg->isErrorImage();
    if (!hasBackgroundImage || (!prevLineBox() && !nextLineBox()) || !parent())
        object()->paintBackgroundExtended(p, c, bgLayer, my, mh, _tx, _ty, w, h, borderLeft(), borderRight(), paddingLeft(), paddingRight());
    else {
        // We have a background image that spans multiple lines.
        // We need to adjust _tx and _ty by the width of all previous lines.
        // Think of background painting on inlines as though you had one long line, a single continuous
        // strip.  Even though that strip has been broken up across multiple lines, you still paint it
        // as though you had one single line.  This means each line has to pick up the background where
        // the previous line left off.
        // FIXME: What the heck do we do with RTL here? The math we're using is obviously not right,
        // but it isn't even clear how this should work at all.
        int xOffsetOnLine = 0;
        for (InlineRunBox* curr = prevLineBox(); curr; curr = curr->prevLineBox())
            xOffsetOnLine += curr->width();
        int startX = _tx - xOffsetOnLine;
        int totalWidth = xOffsetOnLine;
        for (InlineRunBox* curr = this; curr; curr = curr->nextLineBox())
            totalWidth += curr->width();
        p->save();
        p->setClipRect(QRect(_tx, _ty, width(), height()), QPainter::CoordPainter);
        object()->paintBackgroundExtended(p, c, bgLayer, my, mh, startX, _ty,
                                          totalWidth, h, borderLeft(), borderRight(), paddingLeft(), paddingRight());
        p->restore();
    }
}