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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CC_TREES_PROPERTY_TREE_H_ | 5 #ifndef CC_TREES_PROPERTY_TREE_H_ |
6 #define CC_TREES_PROPERTY_TREE_H_ | 6 #define CC_TREES_PROPERTY_TREE_H_ |
7 | 7 |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 | 9 |
10 #include <memory> | 10 #include <memory> |
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302 std::vector<int> nodes_affected_by_inner_viewport_bounds_delta_; | 302 std::vector<int> nodes_affected_by_inner_viewport_bounds_delta_; |
303 std::vector<int> nodes_affected_by_outer_viewport_bounds_delta_; | 303 std::vector<int> nodes_affected_by_outer_viewport_bounds_delta_; |
304 std::vector<TransformCachedNodeData> cached_data_; | 304 std::vector<TransformCachedNodeData> cached_data_; |
305 std::vector<StickyPositionNodeData> sticky_position_data_; | 305 std::vector<StickyPositionNodeData> sticky_position_data_; |
306 }; | 306 }; |
307 | 307 |
308 struct StickyPositionNodeData { | 308 struct StickyPositionNodeData { |
309 int scroll_ancestor; | 309 int scroll_ancestor; |
310 LayerStickyPositionConstraint constraints; | 310 LayerStickyPositionConstraint constraints; |
311 | 311 |
312 // This is the offset that blink has already applied to counteract the main | |
313 // thread scroll offset of the scroll ancestor. We need to account for this | |
314 // by computing the additional offset necessary to keep the element stuck. | |
315 gfx::Vector2dF main_thread_offset; | |
316 | |
317 // In order to properly compute the sticky offset, we need to know if we have | 312 // In order to properly compute the sticky offset, we need to know if we have |
318 // any sticky ancestors both between ourselves and our containing block and | 313 // any sticky ancestors both between ourselves and our containing block and |
319 // between our containing block and the viewport. These ancestors are then | 314 // between our containing block and the viewport. These ancestors are then |
320 // used to correct the constraining rect locations. | 315 // used to correct the constraining rect locations. |
321 int nearest_node_shifting_sticky_box; | 316 int nearest_node_shifting_sticky_box; |
322 int nearest_node_shifting_containing_block; | 317 int nearest_node_shifting_containing_block; |
323 | 318 |
324 // For performance we cache our accumulated sticky offset to allow descendant | 319 // For performance we cache our accumulated sticky offset to allow descendant |
325 // sticky elements to offset their constraint rects. Because we can either | 320 // sticky elements to offset their constraint rects. Because we can either |
326 // affect the sticky box constraint rect or the containing block constraint | 321 // affect the sticky box constraint rect or the containing block constraint |
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722 DrawTransforms& GetDrawTransforms(int transform_id, int effect_id) const; | 717 DrawTransforms& GetDrawTransforms(int transform_id, int effect_id) const; |
723 DrawTransformData& FetchDrawTransformsDataFromCache(int transform_id, | 718 DrawTransformData& FetchDrawTransformsDataFromCache(int transform_id, |
724 int effect_id) const; | 719 int effect_id) const; |
725 | 720 |
726 PropertyTreesCachedData cached_data_; | 721 PropertyTreesCachedData cached_data_; |
727 }; | 722 }; |
728 | 723 |
729 } // namespace cc | 724 } // namespace cc |
730 | 725 |
731 #endif // CC_TREES_PROPERTY_TREE_H_ | 726 #endif // CC_TREES_PROPERTY_TREE_H_ |
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