@angular/animations
Version:
Angular - animations integration with web-animations
137 lines • 17.7 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
const ELAPSED_TIME_MAX_DECIMAL_PLACES = 3;
const ANIMATION_PROP = 'animation';
const ANIMATIONEND_EVENT = 'animationend';
const ONE_SECOND = 1000;
export class ElementAnimationStyleHandler {
constructor(_element, _name, _duration, _delay, _easing, _fillMode, _onDoneFn) {
this._element = _element;
this._name = _name;
this._duration = _duration;
this._delay = _delay;
this._easing = _easing;
this._fillMode = _fillMode;
this._onDoneFn = _onDoneFn;
this._finished = false;
this._destroyed = false;
this._startTime = 0;
this._position = 0;
this._eventFn = (e) => this._handleCallback(e);
}
apply() {
applyKeyframeAnimation(this._element, `${this._duration}ms ${this._easing} ${this._delay}ms 1 normal ${this._fillMode} ${this._name}`);
addRemoveAnimationEvent(this._element, this._eventFn, false);
this._startTime = Date.now();
}
pause() {
playPauseAnimation(this._element, this._name, 'paused');
}
resume() {
playPauseAnimation(this._element, this._name, 'running');
}
setPosition(position) {
const index = findIndexForAnimation(this._element, this._name);
this._position = position * this._duration;
setAnimationStyle(this._element, 'Delay', `-${this._position}ms`, index);
}
getPosition() {
return this._position;
}
_handleCallback(event) {
const timestamp = event._ngTestManualTimestamp || Date.now();
const elapsedTime = parseFloat(event.elapsedTime.toFixed(ELAPSED_TIME_MAX_DECIMAL_PLACES)) * ONE_SECOND;
if (event.animationName == this._name &&
Math.max(timestamp - this._startTime, 0) >= this._delay && elapsedTime >= this._duration) {
this.finish();
}
}
finish() {
if (this._finished)
return;
this._finished = true;
this._onDoneFn();
addRemoveAnimationEvent(this._element, this._eventFn, true);
}
destroy() {
if (this._destroyed)
return;
this._destroyed = true;
this.finish();
removeKeyframeAnimation(this._element, this._name);
}
}
function playPauseAnimation(element, name, status) {
const index = findIndexForAnimation(element, name);
setAnimationStyle(element, 'PlayState', status, index);
}
function applyKeyframeAnimation(element, value) {
const anim = getAnimationStyle(element, '').trim();
let index = 0;
if (anim.length) {
index = countChars(anim, ',') + 1;
value = `${anim}, ${value}`;
}
setAnimationStyle(element, '', value);
return index;
}
function removeKeyframeAnimation(element, name) {
const anim = getAnimationStyle(element, '');
const tokens = anim.split(',');
const index = findMatchingTokenIndex(tokens, name);
if (index >= 0) {
tokens.splice(index, 1);
const newValue = tokens.join(',');
setAnimationStyle(element, '', newValue);
}
}
function findIndexForAnimation(element, value) {
const anim = getAnimationStyle(element, '');
if (anim.indexOf(',') > 0) {
const tokens = anim.split(',');
return findMatchingTokenIndex(tokens, value);
}
return findMatchingTokenIndex([anim], value);
}
function findMatchingTokenIndex(tokens, searchToken) {
for (let i = 0; i < tokens.length; i++) {
if (tokens[i].indexOf(searchToken) >= 0) {
return i;
}
}
return -1;
}
function addRemoveAnimationEvent(element, fn, doRemove) {
doRemove ? element.removeEventListener(ANIMATIONEND_EVENT, fn) :
element.addEventListener(ANIMATIONEND_EVENT, fn);
}
function setAnimationStyle(element, name, value, index) {
const prop = ANIMATION_PROP + name;
if (index != null) {
const oldValue = element.style[prop];
if (oldValue.length) {
const tokens = oldValue.split(',');
tokens[index] = value;
value = tokens.join(',');
}
}
element.style[prop] = value;
}
function getAnimationStyle(element, name) {
return element.style[ANIMATION_PROP + name];
}
function countChars(value, char) {
let count = 0;
for (let i = 0; i < value.length; i++) {
const c = value.charAt(i);
if (c === char)
count++;
}
return count;
}
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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 */\nconst ELAPSED_TIME_MAX_DECIMAL_PLACES = 3;\nconst ANIMATION_PROP = 'animation';\nconst ANIMATIONEND_EVENT = 'animationend';\nconst ONE_SECOND = 1000;\n\nexport class ElementAnimationStyleHandler {\n  private readonly _eventFn: (e: any) => any;\n  private _finished = false;\n  private _destroyed = false;\n  private _startTime = 0;\n  private _position = 0;\n\n  constructor(\n      private readonly _element: any, private readonly _name: string,\n      private readonly _duration: number, private readonly _delay: number,\n      private readonly _easing: string, private readonly _fillMode: ''|'both'|'forwards',\n      private readonly _onDoneFn: () => any) {\n    this._eventFn = (e) => this._handleCallback(e);\n  }\n\n  apply() {\n    applyKeyframeAnimation(\n        this._element,\n        `${this._duration}ms ${this._easing} ${this._delay}ms 1 normal ${this._fillMode} ${\n            this._name}`);\n    addRemoveAnimationEvent(this._element, this._eventFn, false);\n    this._startTime = Date.now();\n  }\n\n  pause() {\n    playPauseAnimation(this._element, this._name, 'paused');\n  }\n\n  resume() {\n    playPauseAnimation(this._element, this._name, 'running');\n  }\n\n  setPosition(position: number) {\n    const index = findIndexForAnimation(this._element, this._name);\n    this._position = position * this._duration;\n    setAnimationStyle(this._element, 'Delay', `-${this._position}ms`, index);\n  }\n\n  getPosition() {\n    return this._position;\n  }\n\n  private _handleCallback(event: any) {\n    const timestamp = event._ngTestManualTimestamp || Date.now();\n    const elapsedTime =\n        parseFloat(event.elapsedTime.toFixed(ELAPSED_TIME_MAX_DECIMAL_PLACES)) * ONE_SECOND;\n    if (event.animationName == this._name &&\n        Math.max(timestamp - this._startTime, 0) >= this._delay && elapsedTime >= this._duration) {\n      this.finish();\n    }\n  }\n\n  finish() {\n    if (this._finished) return;\n    this._finished = true;\n    this._onDoneFn();\n    addRemoveAnimationEvent(this._element, this._eventFn, true);\n  }\n\n  destroy() {\n    if (this._destroyed) return;\n    this._destroyed = true;\n    this.finish();\n    removeKeyframeAnimation(this._element, this._name);\n  }\n}\n\nfunction playPauseAnimation(element: any, name: string, status: 'running'|'paused') {\n  const index = findIndexForAnimation(element, name);\n  setAnimationStyle(element, 'PlayState', status, index);\n}\n\nfunction applyKeyframeAnimation(element: any, value: string): number {\n  const anim = getAnimationStyle(element, '').trim();\n  let index = 0;\n  if (anim.length) {\n    index = countChars(anim, ',') + 1;\n    value = `${anim}, ${value}`;\n  }\n  setAnimationStyle(element, '', value);\n  return index;\n}\n\nfunction removeKeyframeAnimation(element: any, name: string) {\n  const anim = getAnimationStyle(element, '');\n  const tokens = anim.split(',');\n  const index = findMatchingTokenIndex(tokens, name);\n  if (index >= 0) {\n    tokens.splice(index, 1);\n    const newValue = tokens.join(',');\n    setAnimationStyle(element, '', newValue);\n  }\n}\n\nfunction findIndexForAnimation(element: any, value: string) {\n  const anim = getAnimationStyle(element, '');\n  if (anim.indexOf(',') > 0) {\n    const tokens = anim.split(',');\n    return findMatchingTokenIndex(tokens, value);\n  }\n  return findMatchingTokenIndex([anim], value);\n}\n\nfunction findMatchingTokenIndex(tokens: string[], searchToken: string): number {\n  for (let i = 0; i < tokens.length; i++) {\n    if (tokens[i].indexOf(searchToken) >= 0) {\n      return i;\n    }\n  }\n  return -1;\n}\n\nfunction addRemoveAnimationEvent(element: any, fn: (e: any) => any, doRemove: boolean) {\n  doRemove ? element.removeEventListener(ANIMATIONEND_EVENT, fn) :\n             element.addEventListener(ANIMATIONEND_EVENT, fn);\n}\n\nfunction setAnimationStyle(element: any, name: string, value: string, index?: number) {\n  const prop = ANIMATION_PROP + name;\n  if (index != null) {\n    const oldValue = element.style[prop];\n    if (oldValue.length) {\n      const tokens = oldValue.split(',');\n      tokens[index] = value;\n      value = tokens.join(',');\n    }\n  }\n  element.style[prop] = value;\n}\n\nfunction getAnimationStyle(element: any, name: string) {\n  return element.style[ANIMATION_PROP + name];\n}\n\nfunction countChars(value: string, char: string): number {\n  let count = 0;\n  for (let i = 0; i < value.length; i++) {\n    const c = value.charAt(i);\n    if (c === char) count++;\n  }\n  return count;\n}\n"]}