| // 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 ProgrammaticScrollAnimator_h |
| #define ProgrammaticScrollAnimator_h |
| |
| #include "platform/geometry/FloatPoint.h" |
| #include "wtf/FastAllocBase.h" |
| #include "wtf/Noncopyable.h" |
| #include "wtf/OwnPtr.h" |
| #include "wtf/PassOwnPtr.h" |
| |
| namespace blink { |
| |
| class ScrollableArea; |
| class WebScrollOffsetAnimationCurve; |
| |
| // Animator for fixed-destination scrolls, such as those triggered by |
| // CSSOM View scroll APIs. |
| class ProgrammaticScrollAnimator { |
| WTF_MAKE_NONCOPYABLE(ProgrammaticScrollAnimator); |
| WTF_MAKE_FAST_ALLOCATED; |
| public: |
| static PassOwnPtr<ProgrammaticScrollAnimator> create(ScrollableArea*); |
| |
| ~ProgrammaticScrollAnimator(); |
| |
| void animateToOffset(FloatPoint); |
| void cancelAnimation(); |
| void tickAnimation(double monotonicTime); |
| |
| private: |
| explicit ProgrammaticScrollAnimator(ScrollableArea*); |
| |
| void resetAnimationState(); |
| |
| ScrollableArea* m_scrollableArea; |
| OwnPtr<WebScrollOffsetAnimationCurve> m_animationCurve; |
| FloatPoint m_targetOffset; |
| double m_startTime; |
| }; |
| |
| } // namespace blink |
| |
| #endif // ProgrammaticScrollAnimator_h |