void RenderMultiColumnSet::repaintFlowThreadContent(const LayoutRect& repaintRect, bool immediate) const
{
// Figure out the start and end columns and only check within that range so that we don't walk the
// entire column set. Put the repaint rect into flow thread coordinates by flipping it first.
LayoutRect flowThreadRepaintRect(repaintRect);
flowThread()->flipForWritingMode(flowThreadRepaintRect);
// Now we can compare this rect with the flow thread portions owned by each column. First let's
// just see if the repaint rect intersects our flow thread portion at all.
LayoutRect clippedRect(flowThreadRepaintRect);
clippedRect.intersect(RenderRegion::flowThreadPortionOverflowRect());
if (clippedRect.isEmpty())
return;
// Now we know we intersect at least one column. Let's figure out the logical top and logical
// bottom of the area we're repainting.
LayoutUnit repaintLogicalTop = isHorizontalWritingMode() ? flowThreadRepaintRect.y() : flowThreadRepaintRect.x();
LayoutUnit repaintLogicalBottom = (isHorizontalWritingMode() ? flowThreadRepaintRect.maxY() : flowThreadRepaintRect.maxX()) - 1;
unsigned startColumn = columnIndexAtOffset(repaintLogicalTop);
unsigned endColumn = columnIndexAtOffset(repaintLogicalBottom);
LayoutUnit colGap = columnGap();
unsigned colCount = columnCount();
for (unsigned i = startColumn; i <= endColumn; i++) {
LayoutRect colRect = columnRectAt(i);
// Get the portion of the flow thread that corresponds to this column.
LayoutRect flowThreadPortion = flowThreadPortionRectAt(i);
// Now get the overflow rect that corresponds to the column.
LayoutRect flowThreadOverflowPortion = flowThreadPortionOverflowRect(flowThreadPortion, i, colCount, colGap);
// Do a repaint for this specific column.
repaintFlowThreadContentRectangle(repaintRect, immediate, flowThreadPortion, flowThreadOverflowPortion, colRect.location());
}
}
void RenderRegion::repaintFlowThreadContent(const LayoutRect& repaintRect) const
{
repaintFlowThreadContentRectangle(repaintRect, flowThreadPortionRect(), flowThreadPortionOverflowRect(), contentBoxRect().location());
}
void RenderRegion::repaintFlowThreadContent(const LayoutRect& repaintRect, bool immediate)
{
repaintFlowThreadContentRectangle(repaintRect, immediate, flowThreadPortionRect(), contentBoxRect().location());
}
