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1 // Copyright 2015 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 ScrollStateCallback_h | |
6 #define ScrollStateCallback_h | |
7 | |
8 #include "platform/heap/Handle.h" | |
9 | |
10 namespace blink { | |
11 | |
12 class ScrollState; | |
13 | |
14 enum class NativeScrollBehavior { | |
15 DisableNativeScroll, | |
16 PerformBeforeNativeScroll, | |
17 PerformAfterNativeScroll, | |
18 }; | |
19 | |
20 class ScrollStateCallback : public GarbageCollectedFinalized<ScrollStateCallback
> { | |
21 public: | |
22 ScrollStateCallback() | |
23 : m_nativeScrollBehavior(NativeScrollBehavior::DisableNativeScroll) | |
24 { | |
25 } | |
26 | |
27 virtual ~ScrollStateCallback() | |
28 { | |
29 } | |
30 | |
31 DEFINE_INLINE_VIRTUAL_TRACE() {} | |
32 virtual void handleEvent(ScrollState*) = 0; | |
33 | |
34 void setNativeScrollBehavior(NativeScrollBehavior nativeScrollBehavior) | |
35 { | |
36 m_nativeScrollBehavior = nativeScrollBehavior; | |
37 } | |
38 | |
39 NativeScrollBehavior nativeScrollBehavior() | |
40 { | |
41 return m_nativeScrollBehavior; | |
42 } | |
43 | |
44 static NativeScrollBehavior toNativeScrollBehavior(String nativeScrollBehavi
or); | |
45 | |
46 protected: | |
47 NativeScrollBehavior m_nativeScrollBehavior; | |
48 }; | |
49 | |
50 } // namespace blink | |
51 | |
52 #endif // ScrollStateCallback_h | |
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