@angular/animations
Version:
Angular - animations integration with web-animations
170 lines • 20.6 kB
JavaScript
import { computeStyle } from '../../util';
export class WebAnimationsPlayer {
constructor(element, keyframes, options, _specialStyles) {
this.element = element;
this.keyframes = keyframes;
this.options = options;
this._specialStyles = _specialStyles;
this._onDoneFns = [];
this._onStartFns = [];
this._onDestroyFns = [];
this._initialized = false;
this._finished = false;
this._started = false;
this._destroyed = false;
// the following original fns are persistent copies of the _onStartFns and _onDoneFns
// and are used to reset the fns to their original values upon reset()
// (since the _onStartFns and _onDoneFns get deleted after they are called)
this._originalOnDoneFns = [];
this._originalOnStartFns = [];
this.time = 0;
this.parentPlayer = null;
this.currentSnapshot = new Map();
this._duration = options['duration'];
this._delay = options['delay'] || 0;
this.time = this._duration + this._delay;
}
_onFinish() {
if (!this._finished) {
this._finished = true;
this._onDoneFns.forEach(fn => fn());
this._onDoneFns = [];
}
}
init() {
this._buildPlayer();
this._preparePlayerBeforeStart();
}
_buildPlayer() {
if (this._initialized)
return;
this._initialized = true;
const keyframes = this.keyframes;
// @ts-expect-error overwriting a readonly property
this.domPlayer = this._triggerWebAnimation(this.element, keyframes, this.options);
this._finalKeyframe = keyframes.length ? keyframes[keyframes.length - 1] : new Map();
this.domPlayer.addEventListener('finish', () => this._onFinish());
}
_preparePlayerBeforeStart() {
// this is required so that the player doesn't start to animate right away
if (this._delay) {
this._resetDomPlayerState();
}
else {
this.domPlayer.pause();
}
}
_convertKeyframesToObject(keyframes) {
const kfs = [];
keyframes.forEach(frame => {
kfs.push(Object.fromEntries(frame));
});
return kfs;
}
/** @internal */
_triggerWebAnimation(element, keyframes, options) {
return element.animate(this._convertKeyframesToObject(keyframes), options);
}
onStart(fn) {
this._originalOnStartFns.push(fn);
this._onStartFns.push(fn);
}
onDone(fn) {
this._originalOnDoneFns.push(fn);
this._onDoneFns.push(fn);
}
onDestroy(fn) {
this._onDestroyFns.push(fn);
}
play() {
this._buildPlayer();
if (!this.hasStarted()) {
this._onStartFns.forEach(fn => fn());
this._onStartFns = [];
this._started = true;
if (this._specialStyles) {
this._specialStyles.start();
}
}
this.domPlayer.play();
}
pause() {
this.init();
this.domPlayer.pause();
}
finish() {
this.init();
if (this._specialStyles) {
this._specialStyles.finish();
}
this._onFinish();
this.domPlayer.finish();
}
reset() {
this._resetDomPlayerState();
this._destroyed = false;
this._finished = false;
this._started = false;
this._onStartFns = this._originalOnStartFns;
this._onDoneFns = this._originalOnDoneFns;
}
_resetDomPlayerState() {
if (this.domPlayer) {
this.domPlayer.cancel();
}
}
restart() {
this.reset();
this.play();
}
hasStarted() {
return this._started;
}
destroy() {
if (!this._destroyed) {
this._destroyed = true;
this._resetDomPlayerState();
this._onFinish();
if (this._specialStyles) {
this._specialStyles.destroy();
}
this._onDestroyFns.forEach(fn => fn());
this._onDestroyFns = [];
}
}
setPosition(p) {
if (this.domPlayer === undefined) {
this.init();
}
this.domPlayer.currentTime = p * this.time;
}
getPosition() {
// tsc is complaining with TS2362 without the conversion to number
return +(this.domPlayer.currentTime ?? 0) / this.time;
}
get totalTime() {
return this._delay + this._duration;
}
beforeDestroy() {
const styles = new Map();
if (this.hasStarted()) {
// note: this code is invoked only when the `play` function was called prior to this
// (thus `hasStarted` returns true), this implies that the code that initializes
// `_finalKeyframe` has also been executed and the non-null assertion can be safely used here
const finalKeyframe = this._finalKeyframe;
finalKeyframe.forEach((val, prop) => {
if (prop !== 'offset') {
styles.set(prop, this._finished ? val : computeStyle(this.element, prop));
}
});
}
this.currentSnapshot = styles;
}
/** @internal */
triggerCallback(phaseName) {
const methods = phaseName === 'start' ? this._onStartFns : this._onDoneFns;
methods.forEach(fn => fn());
methods.length = 0;
}
}
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimationPlayer, ɵStyleDataMap} from '@angular/animations';\n\nimport {computeStyle} from '../../util';\nimport {SpecialCasedStyles} from '../special_cased_styles';\n\nexport class WebAnimationsPlayer implements AnimationPlayer {\n  private _onDoneFns: Function[] = [];\n  private _onStartFns: Function[] = [];\n  private _onDestroyFns: Function[] = [];\n  private _duration: number;\n  private _delay: number;\n  private _initialized = false;\n  private _finished = false;\n  private _started = false;\n  private _destroyed = false;\n  private _finalKeyframe?: ɵStyleDataMap;\n\n  // the following original fns are persistent copies of the _onStartFns and _onDoneFns\n  // and are used to reset the fns to their original values upon reset()\n  // (since the _onStartFns and _onDoneFns get deleted after they are called)\n  private _originalOnDoneFns: Function[] = [];\n  private _originalOnStartFns: Function[] = [];\n\n  // using non-null assertion because it's re(set) by init();\n  public readonly domPlayer!: Animation;\n  public time = 0;\n\n  public parentPlayer: AnimationPlayer|null = null;\n  public currentSnapshot: ɵStyleDataMap = new Map();\n\n  constructor(\n      public element: any, public keyframes: Array<ɵStyleDataMap>,\n      public options: {[key: string]: string|number},\n      private _specialStyles?: SpecialCasedStyles|null) {\n    this._duration = <number>options['duration'];\n    this._delay = <number>options['delay'] || 0;\n    this.time = this._duration + this._delay;\n  }\n\n  private _onFinish() {\n    if (!this._finished) {\n      this._finished = true;\n      this._onDoneFns.forEach(fn => fn());\n      this._onDoneFns = [];\n    }\n  }\n\n  init(): void {\n    this._buildPlayer();\n    this._preparePlayerBeforeStart();\n  }\n\n  private _buildPlayer(): void {\n    if (this._initialized) return;\n    this._initialized = true;\n\n    const keyframes = this.keyframes;\n    // @ts-expect-error overwriting a readonly property\n    this.domPlayer = this._triggerWebAnimation(this.element, keyframes, this.options);\n    this._finalKeyframe = keyframes.length ? keyframes[keyframes.length - 1] : new Map();\n    this.domPlayer.addEventListener('finish', () => this._onFinish());\n  }\n\n  private _preparePlayerBeforeStart() {\n    // this is required so that the player doesn't start to animate right away\n    if (this._delay) {\n      this._resetDomPlayerState();\n    } else {\n      this.domPlayer.pause();\n    }\n  }\n\n  private _convertKeyframesToObject(keyframes: Array<ɵStyleDataMap>): any[] {\n    const kfs: any[] = [];\n    keyframes.forEach(frame => {\n      kfs.push(Object.fromEntries(frame));\n    });\n    return kfs;\n  }\n\n  /** @internal */\n  _triggerWebAnimation(element: HTMLElement, keyframes: Array<ɵStyleDataMap>, options: any):\n      Animation {\n    return element.animate(this._convertKeyframesToObject(keyframes), options);\n  }\n\n  onStart(fn: () => void): void {\n    this._originalOnStartFns.push(fn);\n    this._onStartFns.push(fn);\n  }\n\n  onDone(fn: () => void): void {\n    this._originalOnDoneFns.push(fn);\n    this._onDoneFns.push(fn);\n  }\n\n  onDestroy(fn: () => void): void {\n    this._onDestroyFns.push(fn);\n  }\n\n  play(): void {\n    this._buildPlayer();\n    if (!this.hasStarted()) {\n      this._onStartFns.forEach(fn => fn());\n      this._onStartFns = [];\n      this._started = true;\n      if (this._specialStyles) {\n        this._specialStyles.start();\n      }\n    }\n    this.domPlayer.play();\n  }\n\n  pause(): void {\n    this.init();\n    this.domPlayer.pause();\n  }\n\n  finish(): void {\n    this.init();\n    if (this._specialStyles) {\n      this._specialStyles.finish();\n    }\n    this._onFinish();\n    this.domPlayer.finish();\n  }\n\n  reset(): void {\n    this._resetDomPlayerState();\n    this._destroyed = false;\n    this._finished = false;\n    this._started = false;\n    this._onStartFns = this._originalOnStartFns;\n    this._onDoneFns = this._originalOnDoneFns;\n  }\n\n  private _resetDomPlayerState() {\n    if (this.domPlayer) {\n      this.domPlayer.cancel();\n    }\n  }\n\n  restart(): void {\n    this.reset();\n    this.play();\n  }\n\n  hasStarted(): boolean {\n    return this._started;\n  }\n\n  destroy(): void {\n    if (!this._destroyed) {\n      this._destroyed = true;\n      this._resetDomPlayerState();\n      this._onFinish();\n      if (this._specialStyles) {\n        this._specialStyles.destroy();\n      }\n      this._onDestroyFns.forEach(fn => fn());\n      this._onDestroyFns = [];\n    }\n  }\n\n  setPosition(p: number): void {\n    if (this.domPlayer === undefined) {\n      this.init();\n    }\n    this.domPlayer.currentTime = p * this.time;\n  }\n\n  getPosition(): number {\n    // tsc is complaining with TS2362 without the conversion to number\n    return +(this.domPlayer.currentTime ?? 0) / this.time;\n  }\n\n  get totalTime(): number {\n    return this._delay + this._duration;\n  }\n\n  beforeDestroy() {\n    const styles: ɵStyleDataMap = new Map();\n    if (this.hasStarted()) {\n      // note: this code is invoked only when the `play` function was called prior to this\n      // (thus `hasStarted` returns true), this implies that the code that initializes\n      // `_finalKeyframe` has also been executed and the non-null assertion can be safely used here\n      const finalKeyframe = this._finalKeyframe!;\n      finalKeyframe.forEach((val, prop) => {\n        if (prop !== 'offset') {\n          styles.set(prop, this._finished ? val : computeStyle(this.element, prop));\n        }\n      });\n    }\n\n    this.currentSnapshot = styles;\n  }\n\n  /** @internal */\n  triggerCallback(phaseName: string): void {\n    const methods = phaseName === 'start' ? this._onStartFns : this._onDoneFns;\n    methods.forEach(fn => fn());\n    methods.length = 0;\n  }\n}\n"]}