public virtual MarginsCollapseInfo StartChildMarginsHandling(IRenderer child, Rectangle layoutBox)
{
if (backupLayoutBox != null)
{
// this should happen only if previous kid was floated
RestoreLayoutBoxAfterFailedLayoutAttempt(layoutBox);
RemoveRendererChild(--processedChildrenNum);
childMarginInfo = null;
}
rendererChildren.Add(child);
int childIndex = processedChildrenNum++;
// If renderer is floated, prepare layout box as if it was inline,
// however it will be restored from backup when next kid processing will start.
bool childIsBlockElement = !RendererIsFloated(child) && IsBlockElement(child);
backupLayoutBox = layoutBox.Clone();
backupCollapseInfo = new MarginsCollapseInfo();
collapseInfo.CopyTo(backupCollapseInfo);
PrepareBoxForLayoutAttempt(layoutBox, childIndex, childIsBlockElement);
if (childIsBlockElement)
{
childMarginInfo = CreateMarginsInfoForBlockChild(childIndex);
}
return(this.childMarginInfo);
}
private void RestoreLayoutBoxAfterFailedLayoutAttempt(Rectangle layoutBox)
{
layoutBox.SetX(backupLayoutBox.GetX()).SetY(backupLayoutBox.GetY()).SetWidth(backupLayoutBox.GetWidth()).SetHeight
(backupLayoutBox.GetHeight());
backupCollapseInfo.CopyTo(collapseInfo);
backupLayoutBox = null;
backupCollapseInfo = null;
}