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#ifndef SubtreeLayoutScope_h
#define SubtreeLayoutScope_h
#include "wtf/HashSet.h"
// This is the way to mark a subtree as needing layout during layout,
// e.g. for the purposes of doing a multipass layout.
//
// It should only be used during layout. Outside of layout, you should
// just call renderer->setNeedsLayout() directly.
//
// It ensures that you don't accidentally mark part of the tree as
// needing layout and not actually lay it out.
namespace WebCore {
class RenderObject;
class SubtreeLayoutScope {
public:
SubtreeLayoutScope(RenderObject* root);
~SubtreeLayoutScope();
void setNeedsLayout(RenderObject* descendant);
void setChildNeedsLayout(RenderObject* descendant);
RenderObject* root() { return m_root; }
void addRendererToLayout(RenderObject* renderer);
private:
RenderObject* m_root;
#ifndef NDEBUG
HashSet<RenderObject*> m_renderersToLayout;
#endif
};
}
#endif