зеркало из https://github.com/mozilla/gecko-dev.git
77 строки
2.8 KiB
C++
77 строки
2.8 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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_ComputedTiming_h
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#define mozilla_ComputedTiming_h
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#include "mozilla/dom/Nullable.h"
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#include "mozilla/StickyTimeDuration.h"
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#include "mozilla/ComputedTimingFunction.h"
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#include "mozilla/dom/AnimationEffectBinding.h" // FillMode
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namespace mozilla {
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/**
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* Stores the results of calculating the timing properties of an animation
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* at a given sample time.
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*/
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struct ComputedTiming
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{
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// The total duration of the animation including all iterations.
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// Will equal StickyTimeDuration::Forever() if the animation repeats
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// indefinitely.
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StickyTimeDuration mActiveDuration;
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// The time within the active interval.
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StickyTimeDuration mActiveTime;
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// The effect end time in local time (i.e. an offset from the effect's
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// start time). Will equal StickyTimeDuration::Forever() if the animation
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// plays indefinitely.
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StickyTimeDuration mEndTime;
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// Progress towards the end of the current iteration. If the effect is
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// being sampled backwards, this will go from 1.0 to 0.0.
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// Will be null if the animation is neither animating nor
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// filling at the sampled time.
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dom::Nullable<double> mProgress;
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// Zero-based iteration index (meaningless if mProgress is null).
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uint64_t mCurrentIteration = 0;
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// Unlike TimingParams::mIterations, this value is
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// guaranteed to be in the range [0, Infinity].
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double mIterations = 1.0;
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double mIterationStart = 0.0;
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StickyTimeDuration mDuration;
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// This is the computed fill mode so it is never auto
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dom::FillMode mFill = dom::FillMode::None;
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bool FillsForwards() const {
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MOZ_ASSERT(mFill != dom::FillMode::Auto,
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"mFill should not be Auto in ComputedTiming.");
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return mFill == dom::FillMode::Both ||
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mFill == dom::FillMode::Forwards;
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}
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bool FillsBackwards() const {
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MOZ_ASSERT(mFill != dom::FillMode::Auto,
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"mFill should not be Auto in ComputedTiming.");
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return mFill == dom::FillMode::Both ||
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mFill == dom::FillMode::Backwards;
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}
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enum class AnimationPhase {
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Idle, // Not sampled (null sample time)
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Before, // Sampled prior to the start of the active interval
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Active, // Sampled within the active interval
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After // Sampled after (or at) the end of the active interval
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};
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AnimationPhase mPhase = AnimationPhase::Idle;
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ComputedTimingFunction::BeforeFlag mBeforeFlag =
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ComputedTimingFunction::BeforeFlag::Unset;
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};
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} // namespace mozilla
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#endif // mozilla_ComputedTiming_h
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