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680815cd6e
This patch was generated automatically by the "modeline.py" script, available here: https://github.com/amccreight/moz-source-tools/blob/master/modeline.py For every file that is modified in this patch, the changes are as follows: (1) The patch changes the file to use the exact C++ mode lines from the Mozilla coding style guide, available here: https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Coding_Style#Mode_Line (2) The patch deletes any blank lines between the mode line & the MPL boilerplate comment. (3) If the file previously had the mode lines and MPL boilerplate in a single contiguous C++ comment, then the patch splits them into separate C++ comments, to match the boilerplate in the coding style. MozReview-Commit-ID: EuRsDue63tK --HG-- extra : rebase_source : 3356d4b80ff6213935192e87cdbc9103fec6084c
50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_layout_ScrollAnimationPhysics_h_
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#define mozilla_layout_ScrollAnimationPhysics_h_
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#include "mozilla/TimeStamp.h"
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#include "nsPoint.h"
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namespace mozilla {
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class ScrollAnimationPhysics
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{
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public:
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virtual void Update(const TimeStamp& aTime,
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const nsPoint& aDestination,
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const nsSize& aCurrentVelocity) = 0;
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// Get the velocity at a point in time in nscoords/sec.
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virtual nsSize VelocityAt(const TimeStamp& aTime) = 0;
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// Returns the expected scroll position at a given point in time, in app
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// units, relative to the scroll frame.
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virtual nsPoint PositionAt(const TimeStamp& aTime) = 0;
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virtual bool IsFinished(const TimeStamp& aTime) = 0;
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virtual ~ScrollAnimationPhysics() {}
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};
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// Helper for accelerated wheel deltas. This can be called from the main thread
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// or the APZ Controller thread.
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static inline double
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ComputeAcceleratedWheelDelta(double aDelta, int32_t aCounter, int32_t aFactor)
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{
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if (!aDelta) {
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return aDelta;
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}
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return (aDelta * aCounter * double(aFactor) / 10);
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}
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static const uint32_t kScrollSeriesTimeoutMs = 80; // in milliseconds
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} // namespace mozilla
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#endif // mozilla_layout_ScrollAnimationPhysics_h_
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