private bool ValidateSubTree(VisualElement root)
{
if (root.renderData.lastLayout != new Rect(root.cssNode.LayoutX, root.cssNode.LayoutY, root.cssNode.LayoutWidth, root.cssNode.LayoutHeight))
{
root.Dirty(ChangeType.Transform);
root.renderData.lastLayout = new Rect(root.cssNode.LayoutX, root.cssNode.LayoutY, root.cssNode.LayoutWidth, root.cssNode.LayoutHeight);
}
bool hasNewLayout = root.cssNode.HasNewLayout;
if (hasNewLayout)
{
for (int i = 0; i < root.shadow.childCount; i++)
{
this.ValidateSubTree(root.shadow[i]);
}
}
using (PostLayoutEvent pooled = PostLayoutEvent.GetPooled(hasNewLayout))
{
pooled.target = root;
UIElementsUtility.eventDispatcher.DispatchEvent(pooled, this);
}
root.ClearDirty(ChangeType.Layout);
root.cssNode.MarkLayoutSeen();
return(hasNewLayout);
}
void ValidateSubTree(VisualElement root)
{
Rect cssRect = new Rect(root.cssNode.LayoutX, root.cssNode.LayoutY, root.cssNode.LayoutWidth, root.cssNode.LayoutHeight);
Rect lastRect = root.renderData.lastLayout;
bool rectChanged = lastRect != cssRect;
// if the last layout rect is different than the current one we must dirty transform on children
if (rectChanged)
{
if (lastRect.position != cssRect.position)
{
root.Dirty(ChangeType.Transform);
}
root.renderData.lastLayout = cssRect;
}
// ignore clean sub trees
bool hasNewLayout = root.cssNode.HasNewLayout;
if (hasNewLayout)
{
for (int i = 0; i < root.shadow.childCount; ++i)
{
ValidateSubTree(root.shadow[i]);
}
}
if (rectChanged)
{
using (var evt = PostLayoutEvent.GetPooled(hasNewLayout, lastRect, cssRect))
{
evt.target = root;
UIElementsUtility.eventDispatcher.DispatchEvent(evt, this);
}
}
// reset both flags at the end
root.ClearDirty(ChangeType.Layout);
if (hasNewLayout)
{
root.cssNode.MarkLayoutSeen();
}
}
