C++ RenderObject::contentHeight方法代码示例

void DeleteSelectionCommand::removeNode(Node *node)
{
    if (isTableStructureNode(node) || node == node->rootEditableElement()) {
        // Do not remove an element of table structure; remove its contents.
        // Likewise for the root editable element.
        Node *child = node->firstChild();
        while (child) {
            Node *remove = child;
            child = child->nextSibling();
            removeNode(remove);
        }
        
        // make sure empty cell has some height
        updateLayout();
        RenderObject *r = node->renderer();
        if (r && r->isTableCell() && r->contentHeight() <= 0)
            insertBlockPlaceholder(Position(node,0));
        return;
    }
    
    if (node == m_startBlock && !isEndOfBlock(VisiblePosition(m_startBlock.get(), 0, DOWNSTREAM).previous()))
        m_needPlaceholder = true;
    else if (node == m_endBlock && !isStartOfBlock(VisiblePosition(m_endBlock.get(), maxDeepOffset(m_endBlock.get()), DOWNSTREAM).next()))
        m_needPlaceholder = true;
    
    // FIXME: Update the endpoints of the range being deleted.
    updatePositionForNodeRemoval(node, m_endingPosition);
    updatePositionForNodeRemoval(node, m_leadingWhitespace);
    updatePositionForNodeRemoval(node, m_trailingWhitespace);
    
    CompositeEditCommand::removeNode(node);
}

VisiblePosition RenderContainer::positionForCoordinates(int _x, int _y)
{
    // no children...return this render object's element, if there is one, and offset 0
    if (!firstChild())
        return VisiblePosition(element(), 0, DOWNSTREAM);

    // look for the geometrically-closest child and pass off to that child
    int min = INT_MAX;
    RenderObject *closestRenderer = 0;
    for (RenderObject *renderer = firstChild(); renderer; renderer = renderer->nextSibling()) {
        if (!renderer->firstChild() && !renderer->isInline() && !renderer->isBlockFlow())
            continue;

        int absx, absy;
        renderer->absolutePosition(absx, absy);
        
        int top = absy + borderTop() + paddingTop();
        int bottom = top + renderer->contentHeight();
        int left = absx + borderLeft() + paddingLeft();
        int right = left + renderer->contentWidth();
        
        int cmp;
        cmp = abs(_y - top);    if (cmp < min) { closestRenderer = renderer; min = cmp; }
        cmp = abs(_y - bottom); if (cmp < min) { closestRenderer = renderer; min = cmp; }
        cmp = abs(_x - left);   if (cmp < min) { closestRenderer = renderer; min = cmp; }
        cmp = abs(_x - right);  if (cmp < min) { closestRenderer = renderer; min = cmp; }
    }
    
    if (closestRenderer)
        return closestRenderer->positionForCoordinates(_x, _y);
    
    return VisiblePosition(element(), 0, DOWNSTREAM);
}

//.........这里部分代码省略.........
        return new CSSPrimitiveValueImpl(def.specifiedSize, CSSPrimitiveValue::CSS_PX);
    }
    case CSS_PROP_FONT_STRETCH:
        // FIXME: unimplemented
        break;
    case CSS_PROP_FONT_STYLE:
    {
        // FIXME: handle oblique?
        FontDef def = style->htmlFont().getFontDef();
        if (def.italic)
            return new CSSPrimitiveValueImpl(CSS_VAL_ITALIC);
        else
            return new CSSPrimitiveValueImpl(CSS_VAL_NORMAL);
    }
    case CSS_PROP_FONT_VARIANT:
    {
        FontDef def = style->htmlFont().getFontDef();
        if (def.smallCaps)
            return new CSSPrimitiveValueImpl(CSS_VAL_SMALL_CAPS);
        else
            return new CSSPrimitiveValueImpl(CSS_VAL_NORMAL);
    }
    case CSS_PROP_FONT_WEIGHT:
    {
        // FIXME: this does not reflect the full range of weights
        // that can be expressed with CSS
        FontDef def = style->htmlFont().getFontDef();
        if (def.weight == QFont::Bold)
            return new CSSPrimitiveValueImpl(CSS_VAL_BOLD);
        else
            return new CSSPrimitiveValueImpl(CSS_VAL_NORMAL);
    }
    case CSS_PROP_HEIGHT:
        return new CSSPrimitiveValueImpl(renderer->contentHeight(), CSSPrimitiveValue::CSS_PX);
    case CSS_PROP_LEFT:
        return getPositionOffsetValue(renderer, CSS_PROP_LEFT);
    case CSS_PROP_LETTER_SPACING:
        if (style->letterSpacing() == 0)
            return new CSSPrimitiveValueImpl(CSS_VAL_NORMAL);
        return new CSSPrimitiveValueImpl(style->letterSpacing(), CSSPrimitiveValue::CSS_PX);
    case CSS_PROP__APPLE_LINE_CLAMP:
        return new CSSPrimitiveValueImpl(style->lineClamp(), CSSPrimitiveValue::CSS_PERCENTAGE);
    case CSS_PROP_LINE_HEIGHT: {
        Length length(style->lineHeight());
	if (length.value < 0)
            return new CSSPrimitiveValueImpl(CSS_VAL_NORMAL);
        if (length.isPercent()) {
            // This is imperfect, because it doesn't include the zoom factor and the real computation
            // for how high to be in pixels does include things like minimum font size and the zoom factor.
            // On the other hand, since font-size doesn't include the zoom factor, we really can't do
            // that here either.
            float fontSize = style->htmlFont().getFontDef().specifiedSize;
            return new CSSPrimitiveValueImpl((int)(length.length() * fontSize) / 100, CSSPrimitiveValue::CSS_PX);
        }
        else {
            return new CSSPrimitiveValueImpl(length.length(), CSSPrimitiveValue::CSS_PX);
        }
    }
    case CSS_PROP_LIST_STYLE_IMAGE:
        if (style->listStyleImage())
            return new CSSPrimitiveValueImpl(style->listStyleImage()->url(), CSSPrimitiveValue::CSS_URI);
        return new CSSPrimitiveValueImpl(CSS_VAL_NONE);
    case CSS_PROP_LIST_STYLE_POSITION:
        switch (style->listStylePosition()) {
            case khtml::OUTSIDE:
                return new CSSPrimitiveValueImpl(CSS_VAL_OUTSIDE);

VisiblePosition RenderContainer::positionForCoordinates(int x, int y)
{
    // no children...return this render object's element, if there is one, and offset 0
    if (!m_firstChild)
        return VisiblePosition(element(), 0, DOWNSTREAM);

    if (isTable() && element()) {
        int right = contentWidth() + borderRight() + paddingRight() + borderLeft() + paddingLeft();
        int bottom = contentHeight() + borderTop() + paddingTop() + borderBottom() + paddingBottom();

        if (x < 0 || x > right || y < 0 || y > bottom) {
            if (x <= right / 2)
                return VisiblePosition(Position(element(), 0));
            else
                return VisiblePosition(Position(element(), maxDeepOffset(element())));
        }
    }

    // Pass off to the closest child.
    int minDist = INT_MAX;
    RenderObject* closestRenderer = 0;
    int newX = x;
    int newY = y;
    if (isTableRow()) {
        newX += xPos();
        newY += yPos();
    }
    for (RenderObject* renderer = m_firstChild; renderer; renderer = renderer->nextSibling()) {
        if (!renderer->firstChild() && !renderer->isInline() && !renderer->isBlockFlow()
                || renderer->style()->visibility() != VISIBLE)
            continue;

        int top = borderTop() + paddingTop() + (isTableRow() ? 0 : renderer->yPos());
        int bottom = top + renderer->contentHeight();
        int left = borderLeft() + paddingLeft() + (isTableRow() ? 0 : renderer->xPos());
        int right = left + renderer->contentWidth();

        if (x <= right && x >= left && y <= top && y >= bottom) {
            if (renderer->isTableRow())
                return renderer->positionForCoordinates(x + newX - renderer->xPos(), y + newY - renderer->yPos());
            return renderer->positionForCoordinates(x - renderer->xPos(), y - renderer->yPos());
        }

        // Find the distance from (x, y) to the box.  Split the space around the box into 8 pieces
        // and use a different compare depending on which piece (x, y) is in.
        IntPoint cmp;
        if (x > right) {
            if (y < top)
                cmp = IntPoint(right, top);
            else if (y > bottom)
                cmp = IntPoint(right, bottom);
            else
                cmp = IntPoint(right, y);
        } else if (x < left) {
            if (y < top)
                cmp = IntPoint(left, top);
            else if (y > bottom)
                cmp = IntPoint(left, bottom);
            else
                cmp = IntPoint(left, y);
        } else {
            if (y < top)
                cmp = IntPoint(x, top);
            else
                cmp = IntPoint(x, bottom);
        }

        int x1minusx2 = cmp.x() - x;
        int y1minusy2 = cmp.y() - y;

        int dist = x1minusx2 * x1minusx2 + y1minusy2 * y1minusy2;
        if (dist < minDist) {
            closestRenderer = renderer;
            minDist = dist;
        }
    }

    if (closestRenderer)
        return closestRenderer->positionForCoordinates(newX - closestRenderer->xPos(), newY - closestRenderer->yPos());

    return VisiblePosition(element(), 0, DOWNSTREAM);
}