Exemplo n.º 1
0
RenderObject* RenderMultiColumnBlock::layoutSpecialExcludedChild(bool relayoutChildren)
{
    if (!m_flowThread)
        return 0;
    
    // Update the sizes of our regions (but not the placement) before we lay out the flow thread.
    // FIXME: Eventually this is going to get way more complicated, and we will be destroying regions
    // instead of trying to keep them around.
    bool shouldInvalidateRegions = false;
    for (RenderBox* childBox = firstChildBox(); childBox; childBox = childBox->nextSiblingBox()) {
        if (childBox == m_flowThread)
            continue;
        
        if (relayoutChildren || childBox->needsLayout()) {
            childBox->updateLogicalWidth();
            childBox->updateLogicalHeight();
            shouldInvalidateRegions = true;
        }
    }
    
    if (shouldInvalidateRegions)
        m_flowThread->invalidateRegions();

    if (relayoutChildren)
        m_flowThread->setChildNeedsLayout(true, MarkOnlyThis);
    
    setLogicalTopForChild(m_flowThread, borderBefore() + paddingBefore());
    m_flowThread->layoutIfNeeded();
    determineLogicalLeftPositionForChild(m_flowThread);
    
    return m_flowThread;
}
Exemplo n.º 2
0
inline void RenderBlockFlow::layoutBlockFlow(bool relayoutChildren, SubtreeLayoutScope& layoutScope)
{
    LayoutUnit oldLeft = logicalLeft();
    bool logicalWidthChanged = updateLogicalWidthAndColumnWidth();
    relayoutChildren |= logicalWidthChanged;

    LayoutState state(*this, locationOffset(), logicalWidthChanged);

    LayoutUnit beforeEdge = borderBefore() + paddingBefore();
    LayoutUnit afterEdge = borderAfter() + paddingAfter();
    LayoutUnit previousHeight = logicalHeight();
    setLogicalHeight(beforeEdge);

    m_paintInvalidationLogicalTop = 0;
    m_paintInvalidationLogicalBottom = 0;
    if (!firstChild() && !isAnonymousBlock())
        setChildrenInline(true);

    if (childrenInline())
        layoutInlineChildren(relayoutChildren, m_paintInvalidationLogicalTop, m_paintInvalidationLogicalBottom, afterEdge);
    else
        layoutBlockChildren(relayoutChildren, layoutScope, beforeEdge, afterEdge);

    LayoutUnit oldClientAfterEdge = clientLogicalBottom();

    updateLogicalHeight();

    if (previousHeight != logicalHeight())
        relayoutChildren = true;

    layoutPositionedObjects(relayoutChildren || isDocumentElement(), oldLeft != logicalLeft() ? ForcedLayoutAfterContainingBlockMoved : DefaultLayout);

    // Add overflow from children (unless we're multi-column, since in that case all our child overflow is clipped anyway).
    computeOverflow(oldClientAfterEdge);
}
LayoutRect RenderMultiColumnSet::columnRectAt(unsigned index) const
{
    LayoutUnit colLogicalWidth = computedColumnWidth();
    LayoutUnit colLogicalHeight = computedColumnHeight();
    LayoutUnit colLogicalTop = borderBefore() + paddingBefore();
    LayoutUnit colLogicalLeft = borderAndPaddingLogicalLeft();
    int colGap = columnGap();
    if (style()->isLeftToRightDirection())
        colLogicalLeft += index * (colLogicalWidth + colGap);
    else
        colLogicalLeft += contentLogicalWidth() - colLogicalWidth - index * (colLogicalWidth + colGap);

    if (isHorizontalWritingMode())
        return LayoutRect(colLogicalLeft, colLogicalTop, colLogicalWidth, colLogicalHeight);
    return LayoutRect(colLogicalTop, colLogicalLeft, colLogicalHeight, colLogicalWidth);
}
Exemplo n.º 4
0
void RenderSVGText::layout()
{
    ASSERT(needsLayout());

    subtreeStyleDidChange();

    LayoutRepainter repainter(*this, SVGRenderSupport::checkForSVGRepaintDuringLayout(this));

    bool updateCachedBoundariesInParents = false;
    if (m_needsTransformUpdate) {
        m_localTransform = toSVGTextElement(node())->animatedLocalTransform();
        m_needsTransformUpdate = false;
        updateCachedBoundariesInParents = true;
    }

    if (!everHadLayout()) {
        // When laying out initially, collect all layout attributes, build the character data map,
        // and propogate resulting SVGLayoutAttributes to all RenderSVGInlineText children in the subtree.
        ASSERT(m_layoutAttributes.isEmpty());
        collectLayoutAttributes(this, m_layoutAttributes);
        updateFontInAllDescendants(this);
        m_layoutAttributesBuilder.buildLayoutAttributesForForSubtree(this);

        m_needsReordering = true;
        m_needsTextMetricsUpdate = false;
        m_needsPositioningValuesUpdate = false;
        updateCachedBoundariesInParents = true;
    } else if (m_needsPositioningValuesUpdate) {
        // When the x/y/dx/dy/rotate lists change, recompute the layout attributes, and eventually
        // update the on-screen font objects as well in all descendants.
        if (m_needsTextMetricsUpdate) {
            updateFontInAllDescendants(this);
            m_needsTextMetricsUpdate = false;
        }

        m_layoutAttributesBuilder.buildLayoutAttributesForForSubtree(this);
        m_needsReordering = true;
        m_needsPositioningValuesUpdate = false;
        updateCachedBoundariesInParents = true;
    } else if (m_needsTextMetricsUpdate || SVGRenderSupport::findTreeRootObject(this)->isLayoutSizeChanged()) {
        // If the root layout size changed (eg. window size changes) or the transform to the root
        // context has changed then recompute the on-screen font size.
        updateFontInAllDescendants(this, &m_layoutAttributesBuilder);

        ASSERT(!m_needsReordering);
        ASSERT(!m_needsPositioningValuesUpdate);
        m_needsTextMetricsUpdate = false;
        updateCachedBoundariesInParents = true;
    }

    checkLayoutAttributesConsistency(this, m_layoutAttributes);

    // Reduced version of RenderBlock::layoutBlock(), which only takes care of SVG text.
    // All if branches that could cause early exit in RenderBlocks layoutBlock() method are turned into assertions.
    ASSERT(!isInline());
    ASSERT(!simplifiedLayout());
    ASSERT(!scrollsOverflow());
    ASSERT(!hasControlClip());
    ASSERT(!hasColumns());
    ASSERT(!positionedObjects());
    ASSERT(!m_overflow);
    ASSERT(!isAnonymousBlock());

    if (!firstChild())
        setChildrenInline(true);

    // FIXME: We need to find a way to only layout the child boxes, if needed.
    FloatRect oldBoundaries = objectBoundingBox();
    ASSERT(childrenInline());

    rebuildFloatsFromIntruding();

    LayoutUnit beforeEdge = borderBefore() + paddingBefore();
    LayoutUnit afterEdge = borderAfter() + paddingAfter() + scrollbarLogicalHeight();
    setLogicalHeight(beforeEdge);

    LayoutUnit repaintLogicalTop = 0;
    LayoutUnit repaintLogicalBottom = 0;
    layoutInlineChildren(true, repaintLogicalTop, repaintLogicalBottom, afterEdge);

    if (m_needsReordering)
        m_needsReordering = false;

    if (!updateCachedBoundariesInParents)
        updateCachedBoundariesInParents = oldBoundaries != objectBoundingBox();

    // Invalidate all resources of this client if our layout changed.
    if (everHadLayout() && selfNeedsLayout())
        SVGResourcesCache::clientLayoutChanged(this);

    // If our bounds changed, notify the parents.
    if (updateCachedBoundariesInParents)
        RenderSVGBlock::setNeedsBoundariesUpdate();

    repainter.repaintAfterLayout();
    clearNeedsLayout();
}