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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_ComputedTiming_h
#define mozilla_ComputedTiming_h
#include "mozilla/StickyTimeDuration.h"
#include "mozilla/dom/AnimationEffectBinding.h" // FillMode
#include "mozilla/dom/Nullable.h"
namespace mozilla {
/**
* Stores the results of calculating the timing properties of an animation
* at a given sample time.
*/
struct ComputedTiming {
// The total duration of the animation including all iterations.
// Will equal StickyTimeDuration::Forever() if the animation repeats
// indefinitely.
StickyTimeDuration mActiveDuration;
// The time within the active interval.
StickyTimeDuration mActiveTime;
// The effect end time in local time (i.e. an offset from the effect's
// start time). Will equal StickyTimeDuration::Forever() if the animation
// plays indefinitely.
StickyTimeDuration mEndTime;
// Progress towards the end of the current iteration. If the effect is
// being sampled backwards, this will go from 1.0 to 0.0.
// Will be null if the animation is neither animating nor
// filling at the sampled time.
dom::Nullable<double> mProgress;
// Zero-based iteration index (meaningless if mProgress is null).
uint64_t mCurrentIteration = 0;
// Unlike TimingParams::mIterations, this value is
// guaranteed to be in the range [0, Infinity].
double mIterations = 1.0;
double mIterationStart = 0.0;
StickyTimeDuration mDuration;
// This is the computed fill mode so it is never auto
dom::FillMode mFill = dom::FillMode::None;
bool FillsForwards() const {
MOZ_ASSERT(mFill != dom::FillMode::Auto,
"mFill should not be Auto in ComputedTiming.");
return mFill == dom::FillMode::Both || mFill == dom::FillMode::Forwards;
}
bool FillsBackwards() const {
MOZ_ASSERT(mFill != dom::FillMode::Auto,
"mFill should not be Auto in ComputedTiming.");
return mFill == dom::FillMode::Both || mFill == dom::FillMode::Backwards;
}
enum class AnimationPhase {
Idle, // Not sampled (null sample time)
Before, // Sampled prior to the start of the active interval
Active, // Sampled within the active interval
After // Sampled after (or at) the end of the active interval
};
AnimationPhase mPhase = AnimationPhase::Idle;
bool mBeforeFlag = false;
};
} // namespace mozilla
#endif // mozilla_ComputedTiming_h
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