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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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