unsigned MultiColumnFragmentainerGroup::actualColumnCount() const
{
// We must always return a value of 1 or greater. Column count = 0 is a meaningless situation,
// and will confuse and cause problems in other parts of the code.
if (!m_columnHeight)
return 1;
// Our flow thread portion determines our column count. We have as many columns as needed to fit
// all the content.
LayoutUnit flowThreadPortionHeight = logicalHeightInFlowThread();
if (!flowThreadPortionHeight)
return 1;
unsigned count = ceil(flowThreadPortionHeight.toFloat() / m_columnHeight.toFloat());
ASSERT(count >= 1);
return count;
}
unsigned MultiColumnFragmentainerGroup::actualColumnCount() const {
// We must always return a value of 1 or greater. Column count = 0 is a
// meaningless situation, and will confuse and cause problems in other parts
// of the code.
if (!m_columnHeight)
return 1;
// Our flow thread portion determines our column count. We have as many
// columns as needed to fit all the content.
LayoutUnit flowThreadPortionHeight = logicalHeightInFlowThread();
if (!flowThreadPortionHeight)
return 1;
unsigned count = (flowThreadPortionHeight / m_columnHeight).floor();
// flowThreadPortionHeight may be saturated, so detect the remainder manually.
if (count * m_columnHeight < flowThreadPortionHeight)
count++;
ASSERT(count >= 1);
return count;
}
LayoutRect LayoutMultiColumnSet::flowThreadPortionRect() const
{
LayoutRect portionRect(LayoutUnit(), logicalTopInFlowThread(), pageLogicalWidth(), logicalHeightInFlowThread());
if (!isHorizontalWritingMode())
return portionRect.transposedRect();
return portionRect;
}