LayoutUnit MultiColumnFragmentainerGroup::calculateMaxColumnHeight() const
{
LayoutBlockFlow* multicolBlock = m_columnSet.multiColumnBlockFlow();
const ComputedStyle& multicolStyle = multicolBlock->styleRef();
LayoutMultiColumnFlowThread* flowThread = m_columnSet.multiColumnFlowThread();
LayoutUnit availableHeight = flowThread->columnHeightAvailable();
LayoutUnit maxColumnHeight = availableHeight ? availableHeight : LayoutUnit::max();
if (!multicolStyle.logicalMaxHeight().isMaxSizeNone()) {
LayoutUnit logicalMaxHeight = multicolBlock->computeContentLogicalHeight(MaxSize, multicolStyle.logicalMaxHeight(), -1);
if (logicalMaxHeight != -1 && maxColumnHeight > logicalMaxHeight)
maxColumnHeight = logicalMaxHeight;
}
LayoutUnit maxHeight = heightAdjustedForRowOffset(maxColumnHeight);
if (LayoutMultiColumnFlowThread* enclosingFlowThread = flowThread->enclosingFlowThread()) {
if (enclosingFlowThread->isPageLogicalHeightKnown()) {
// We're nested inside another fragmentation context whose fragmentainer heights are
// known. This constrains the max height.
LayoutUnit remainingOuterLogicalHeight = enclosingFlowThread->pageRemainingLogicalHeightForOffset(blockOffsetInEnclosingFlowThread(), LayoutBlock::AssociateWithLatterPage);
ASSERT(remainingOuterLogicalHeight > 0);
if (maxHeight > remainingOuterLogicalHeight)
maxHeight = remainingOuterLogicalHeight;
}
}
return maxHeight;
}
LayoutUnit MultiColumnFragmentainerGroup::calculateMaxColumnHeight() const
{
LayoutBlockFlow* multicolBlock = m_columnSet.multiColumnBlockFlow();
const ComputedStyle& multicolStyle = multicolBlock->styleRef();
LayoutUnit availableHeight = m_columnSet.multiColumnFlowThread()->columnHeightAvailable();
LayoutUnit maxColumnHeight = availableHeight ? availableHeight : LayoutUnit::max();
if (!multicolStyle.logicalMaxHeight().isMaxSizeNone()) {
LayoutUnit logicalMaxHeight = multicolBlock->computeContentLogicalHeight(MaxSize, multicolStyle.logicalMaxHeight(), -1);
if (logicalMaxHeight != -1 && maxColumnHeight > logicalMaxHeight)
maxColumnHeight = logicalMaxHeight;
}
return heightAdjustedForRowOffset(maxColumnHeight);
}