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/* 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/. */
"use strict";
/**
* In animation inspector, the scrubber and the progress bar moves along the current time
* of animation. However, the processing which sync with actual animations is heavy since
* we have to communication by the actor. The role of this class is to make the pseudo
* current time in animation inspector to proceed.
*/
class CurrentTimeTimer {
/**
* Constructor.
*
* @param {Object} timeScale
* @param {Bool} shouldStopAfterEndTime
* If need to stop the timer after animation end time, set true.
* @param {window} win
* Be used for requestAnimationFrame and performance.
* @param {Function} onUpdated
* Listener function to get updating.
* This function is called with 2 parameters.
* 1st: current time
* 2nd: if shouldStopAfterEndTime is true and
* the current time is over the end time, true is given.
*/
constructor(timeScale, shouldStopAfterEndTime, win, onUpdated) {
this.baseCurrentTime = timeScale.getCurrentTime();
this.endTime = timeScale.getDuration();
this.timerStartTime = win.performance.now();
this.shouldStopAfterEndTime = shouldStopAfterEndTime;
this.onUpdated = onUpdated;
this.win = win;
this.next = this.next.bind(this);
}
destroy() {
this.stop();
this.onUpdated = null;
this.win = null;
}
/**
* Proceed the pseudo current time.
*/
next() {
if (this.doStop) {
return;
}
const currentTime =
this.baseCurrentTime + this.win.performance.now() - this.timerStartTime;
if (this.endTime < currentTime && this.shouldStopAfterEndTime) {
this.onUpdated(this.endTime, true);
return;
}
this.onUpdated(currentTime);
this.win.requestAnimationFrame(this.next);
}
start() {
this.next();
}
stop() {
this.doStop = true;
}
}
module.exports = CurrentTimeTimer;
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