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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 | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef CC_TREES_LAYER_TREE_SCROLL_ELASTICITY_CLIENT_H_ | |
6 #define CC_TREES_LAYER_TREE_SCROLL_ELASTICITY_CLIENT_H_ | |
7 | |
8 #include "cc/input/scroll_elasticity_controller.h" | |
9 | |
10 namespace cc { | |
11 | |
12 class LayerTreeHostImpl; | |
13 | |
14 // Interface between a LayerTreeHostImpl and a ScrollElasticityController. It | |
15 // would be possible, in principle, for LayerTreeHostImpl to implement the | |
16 // ScrollElasticityControllerClient interface itself. This artificial boundary | |
17 // is introduced to reduce the amount of logic and state held directly inside | |
18 // LayerTreeHostImpl. | |
19 class CC_EXPORT LayerTreeScrollElasticityClient | |
20 : public ScrollElasticityControllerClient { | |
21 public: | |
22 explicit LayerTreeScrollElasticityClient(LayerTreeHostImpl* layer_tree); | |
23 virtual ~LayerTreeScrollElasticityClient(); | |
24 | |
25 // Interface between LayerTreeHostImpl and the controller. | |
26 void Animate(base::TimeTicks monotonic_time); | |
27 | |
28 private: | |
aelias_OOO_until_Jul13
2014/11/12 22:17:59
I don't think this should be private in the subcla
ccameron
2014/11/13 00:28:37
This issue went away because of using a concrete c
| |
29 // ScrollElasticityControllerClient implementation: | |
30 void BindToController(ScrollElasticityController* controller) override; | |
31 bool AllowsHorizontalStretching() override; | |
32 bool AllowsVerticalStretching() override; | |
33 gfx::Vector2dF StretchAmount() override; | |
34 bool PinnedInDirection(const gfx::Vector2dF& direction) override; | |
35 bool CanScrollHorizontally() override; | |
36 bool CanScrollVertically() override; | |
37 gfx::Vector2dF AbsoluteScrollPosition() override; | |
38 void ImmediateScrollBy(const gfx::Vector2dF& scroll) override; | |
39 void ImmediateScrollByWithoutContentEdgeConstraints( | |
40 const gfx::Vector2dF& scroll) override; | |
41 void StartSnapRubberbandTimer() override; | |
42 void StopSnapRubberbandTimer() override; | |
43 void AdjustScrollPositionToBoundsIfNecessary() override; | |
44 | |
45 LayerTreeHostImpl* layer_tree_; | |
46 ScrollElasticityController* controller_; | |
47 gfx::Vector2dF stretch_offset_; | |
48 bool timer_active_; | |
49 }; | |
50 | |
51 } // namespace cc | |
52 | |
53 #endif // CC_TREES_LAYER_TREE_SCROLL_ELASTICITY_CLIENT_H_ | |
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