| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef UI_VIEWS_CULL_SET_H_ |
| #define UI_VIEWS_CULL_SET_H_ |
| |
| #include "base/containers/hash_tables.h" |
| #include "base/macros.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "ui/views/views_export.h" |
| |
| namespace views { |
| |
| class View; |
| |
| // A CullSet defines a set of View pointers which have been possibly culled |
| // from painting or other bounds-checking operations. It wraps a set of |
| // pointers to views, or NULL if no such set is available. |
| class VIEWS_EXPORT CullSet { |
| public: |
| // Default constructor builds a CullSet that will always return true for |
| // ShouldPaint(). |
| CullSet(); |
| ~CullSet(); |
| |
| // Wraps a set of pointers to Views, as might be provided by |
| // gfx::RTree::Query(), that intersect the damage rect and therefore need |
| // to be painted. CullSet takes ownership of the provided pointer. |
| CullSet(scoped_ptr<base::hash_set<intptr_t> > cull_set); |
| |
| // Returns true if |view| needs to be painted. |
| bool ShouldPaint(const View* view) const; |
| |
| private: |
| friend class BoundsTreeTestView; |
| |
| // The set of Views that collided with the query rectangle provided to the |
| // RTree data structure, or NULL if one is not available. |
| scoped_ptr<base::hash_set<intptr_t> > cull_set_; |
| |
| DISALLOW_COPY_AND_ASSIGN(CullSet); |
| }; |
| |
| } // namespace views |
| |
| #endif // UI_VIEWS_CULL_SET_H_ |