import { __extends } from "tslib";
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import Eventful from '../core/Eventful.js';
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import requestAnimationFrame from './requestAnimationFrame.js';
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import Animator from './Animator.js';
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export function getTime() {
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return new Date().getTime();
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}
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var Animation = (function (_super) {
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__extends(Animation, _super);
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function Animation(opts) {
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var _this = _super.call(this) || this;
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_this._running = false;
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_this._time = 0;
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_this._pausedTime = 0;
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_this._pauseStart = 0;
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_this._paused = false;
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opts = opts || {};
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_this.stage = opts.stage || {};
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return _this;
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}
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Animation.prototype.addClip = function (clip) {
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if (clip.animation) {
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this.removeClip(clip);
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}
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if (!this._head) {
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this._head = this._tail = clip;
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}
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else {
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this._tail.next = clip;
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clip.prev = this._tail;
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clip.next = null;
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this._tail = clip;
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}
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clip.animation = this;
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};
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Animation.prototype.addAnimator = function (animator) {
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animator.animation = this;
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var clip = animator.getClip();
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if (clip) {
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this.addClip(clip);
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}
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};
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Animation.prototype.removeClip = function (clip) {
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if (!clip.animation) {
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return;
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}
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var prev = clip.prev;
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var next = clip.next;
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if (prev) {
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prev.next = next;
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}
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else {
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this._head = next;
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}
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if (next) {
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next.prev = prev;
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}
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else {
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this._tail = prev;
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}
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clip.next = clip.prev = clip.animation = null;
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};
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Animation.prototype.removeAnimator = function (animator) {
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var clip = animator.getClip();
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if (clip) {
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this.removeClip(clip);
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}
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animator.animation = null;
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};
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Animation.prototype.update = function (notTriggerFrameAndStageUpdate) {
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var time = getTime() - this._pausedTime;
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var delta = time - this._time;
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var clip = this._head;
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while (clip) {
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var nextClip = clip.next;
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var finished = clip.step(time, delta);
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if (finished) {
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clip.ondestroy();
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this.removeClip(clip);
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clip = nextClip;
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}
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else {
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clip = nextClip;
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}
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}
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this._time = time;
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if (!notTriggerFrameAndStageUpdate) {
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this.trigger('frame', delta);
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this.stage.update && this.stage.update();
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}
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};
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Animation.prototype._startLoop = function () {
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var self = this;
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this._running = true;
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function step() {
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if (self._running) {
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requestAnimationFrame(step);
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!self._paused && self.update();
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}
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}
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requestAnimationFrame(step);
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};
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Animation.prototype.start = function () {
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if (this._running) {
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return;
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}
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this._time = getTime();
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this._pausedTime = 0;
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this._startLoop();
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};
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Animation.prototype.stop = function () {
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this._running = false;
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};
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Animation.prototype.pause = function () {
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if (!this._paused) {
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this._pauseStart = getTime();
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this._paused = true;
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}
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};
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Animation.prototype.resume = function () {
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if (this._paused) {
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this._pausedTime += getTime() - this._pauseStart;
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this._paused = false;
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}
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};
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Animation.prototype.clear = function () {
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var clip = this._head;
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while (clip) {
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var nextClip = clip.next;
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clip.prev = clip.next = clip.animation = null;
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clip = nextClip;
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}
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this._head = this._tail = null;
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};
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Animation.prototype.isFinished = function () {
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return this._head == null;
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};
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Animation.prototype.animate = function (target, options) {
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options = options || {};
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this.start();
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var animator = new Animator(target, options.loop);
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this.addAnimator(animator);
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return animator;
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};
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return Animation;
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}(Eventful));
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export default Animation;
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