angular2
Version:
Angular 2 - a web framework for modern web apps
173 lines • 25.6 kB
JavaScript
import { DateWrapper, StringWrapper, RegExpWrapper, NumberWrapper, isPresent } from 'angular2/src/facade/lang';
import { Math } from 'angular2/src/facade/math';
import { camelCaseToDashCase } from 'angular2/src/platform/dom/util';
import { StringMapWrapper } from 'angular2/src/facade/collection';
import { DOM } from 'angular2/src/platform/dom/dom_adapter';
export class Animation {
/**
* Stores the start time and starts the animation
* @param element
* @param data
* @param browserDetails
*/
constructor(element, data, browserDetails) {
this.element = element;
this.data = data;
this.browserDetails = browserDetails;
/** functions to be called upon completion */
this.callbacks = [];
/** functions for removing event listeners */
this.eventClearFunctions = [];
/** flag used to track whether or not the animation has finished */
this.completed = false;
this._stringPrefix = '';
this.startTime = DateWrapper.toMillis(DateWrapper.now());
this._stringPrefix = DOM.getAnimationPrefix();
this.setup();
this.wait(timestamp => this.start());
}
/** total amount of time that the animation should take including delay */
get totalTime() {
let delay = this.computedDelay != null ? this.computedDelay : 0;
let duration = this.computedDuration != null ? this.computedDuration : 0;
return delay + duration;
}
wait(callback) {
// Firefox requires 2 frames for some reason
this.browserDetails.raf(callback, 2);
}
/**
* Sets up the initial styles before the animation is started
*/
setup() {
if (this.data.fromStyles != null)
this.applyStyles(this.data.fromStyles);
if (this.data.duration != null)
this.applyStyles({ 'transitionDuration': this.data.duration.toString() + 'ms' });
if (this.data.delay != null)
this.applyStyles({ 'transitionDelay': this.data.delay.toString() + 'ms' });
}
/**
* After the initial setup has occurred, this method adds the animation styles
*/
start() {
this.addClasses(this.data.classesToAdd);
this.addClasses(this.data.animationClasses);
this.removeClasses(this.data.classesToRemove);
if (this.data.toStyles != null)
this.applyStyles(this.data.toStyles);
var computedStyles = DOM.getComputedStyle(this.element);
this.computedDelay =
Math.max(this.parseDurationString(computedStyles.getPropertyValue(this._stringPrefix + 'transition-delay')), this.parseDurationString(this.element.style.getPropertyValue(this._stringPrefix + 'transition-delay')));
this.computedDuration = Math.max(this.parseDurationString(computedStyles.getPropertyValue(this._stringPrefix + 'transition-duration')), this.parseDurationString(this.element.style.getPropertyValue(this._stringPrefix + 'transition-duration')));
this.addEvents();
}
/**
* Applies the provided styles to the element
* @param styles
*/
applyStyles(styles) {
StringMapWrapper.forEach(styles, (value, key) => {
var dashCaseKey = camelCaseToDashCase(key);
if (isPresent(DOM.getStyle(this.element, dashCaseKey))) {
DOM.setStyle(this.element, dashCaseKey, value.toString());
}
else {
DOM.setStyle(this.element, this._stringPrefix + dashCaseKey, value.toString());
}
});
}
/**
* Adds the provided classes to the element
* @param classes
*/
addClasses(classes) {
for (let i = 0, len = classes.length; i < len; i++)
DOM.addClass(this.element, classes[i]);
}
/**
* Removes the provided classes from the element
* @param classes
*/
removeClasses(classes) {
for (let i = 0, len = classes.length; i < len; i++)
DOM.removeClass(this.element, classes[i]);
}
/**
* Adds events to track when animations have finished
*/
addEvents() {
if (this.totalTime > 0) {
this.eventClearFunctions.push(DOM.onAndCancel(this.element, DOM.getTransitionEnd(), (event) => this.handleAnimationEvent(event)));
}
else {
this.handleAnimationCompleted();
}
}
handleAnimationEvent(event) {
let elapsedTime = Math.round(event.elapsedTime * 1000);
if (!this.browserDetails.elapsedTimeIncludesDelay)
elapsedTime += this.computedDelay;
event.stopPropagation();
if (elapsedTime >= this.totalTime)
this.handleAnimationCompleted();
}
/**
* Runs all animation callbacks and removes temporary classes
*/
handleAnimationCompleted() {
this.removeClasses(this.data.animationClasses);
this.callbacks.forEach(callback => callback());
this.callbacks = [];
this.eventClearFunctions.forEach(fn => fn());
this.eventClearFunctions = [];
this.completed = true;
}
/**
* Adds animation callbacks to be called upon completion
* @param callback
* @returns {Animation}
*/
onComplete(callback) {
if (this.completed) {
callback();
}
else {
this.callbacks.push(callback);
}
return this;
}
/**
* Converts the duration string to the number of milliseconds
* @param duration
* @returns {number}
*/
parseDurationString(duration) {
var maxValue = 0;
// duration must have at least 2 characters to be valid. (number + type)
if (duration == null || duration.length < 2) {
return maxValue;
}
else if (duration.substring(duration.length - 2) == 'ms') {
let value = NumberWrapper.parseInt(this.stripLetters(duration), 10);
if (value > maxValue)
maxValue = value;
}
else if (duration.substring(duration.length - 1) == 's') {
let ms = NumberWrapper.parseFloat(this.stripLetters(duration)) * 1000;
let value = Math.floor(ms);
if (value > maxValue)
maxValue = value;
}
return maxValue;
}
/**
* Strips the letters from the duration string
* @param str
* @returns {string}
*/
stripLetters(str) {
return StringWrapper.replaceAll(str, RegExpWrapper.create('[^0-9]+$', ''), '');
}
}
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{\n  DateWrapper,\n  StringWrapper,\n  RegExpWrapper,\n  NumberWrapper,\n  isPresent\n} from 'angular2/src/facade/lang';\nimport {Math} from 'angular2/src/facade/math';\nimport {camelCaseToDashCase} from 'angular2/src/platform/dom/util';\nimport {StringMapWrapper} from 'angular2/src/facade/collection';\nimport {DOM} from 'angular2/src/platform/dom/dom_adapter';\n\nimport {BrowserDetails} from './browser_details';\nimport {CssAnimationOptions} from './css_animation_options';\n\nexport class Animation {\n  /** functions to be called upon completion */\n  callbacks: Function[] = [];\n\n  /** the duration (ms) of the animation (whether from CSS or manually set) */\n  computedDuration: number;\n\n  /** the animation delay (ms) (whether from CSS or manually set) */\n  computedDelay: number;\n\n  /** timestamp of when the animation started */\n  startTime: number;\n\n  /** functions for removing event listeners */\n  eventClearFunctions: Function[] = [];\n\n  /** flag used to track whether or not the animation has finished */\n  completed: boolean = false;\n\n  private _stringPrefix: string = '';\n\n  /** total amount of time that the animation should take including delay */\n  get totalTime(): number {\n    let delay = this.computedDelay != null ? this.computedDelay : 0;\n    let duration = this.computedDuration != null ? this.computedDuration : 0;\n    return delay + duration;\n  }\n\n  /**\n   * Stores the start time and starts the animation\n   * @param element\n   * @param data\n   * @param browserDetails\n   */\n  constructor(public element: HTMLElement, public data: CssAnimationOptions,\n              public browserDetails: BrowserDetails) {\n    this.startTime = DateWrapper.toMillis(DateWrapper.now());\n    this._stringPrefix = DOM.getAnimationPrefix();\n    this.setup();\n    this.wait(timestamp => this.start());\n  }\n\n  wait(callback: Function) {\n    // Firefox requires 2 frames for some reason\n    this.browserDetails.raf(callback, 2);\n  }\n\n  /**\n   * Sets up the initial styles before the animation is started\n   */\n  setup(): void {\n    if (this.data.fromStyles != null) this.applyStyles(this.data.fromStyles);\n    if (this.data.duration != null)\n      this.applyStyles({'transitionDuration': this.data.duration.toString() + 'ms'});\n    if (this.data.delay != null)\n      this.applyStyles({'transitionDelay': this.data.delay.toString() + 'ms'});\n  }\n\n  /**\n   * After the initial setup has occurred, this method adds the animation styles\n   */\n  start(): void {\n    this.addClasses(this.data.classesToAdd);\n    this.addClasses(this.data.animationClasses);\n    this.removeClasses(this.data.classesToRemove);\n    if (this.data.toStyles != null) this.applyStyles(this.data.toStyles);\n    var computedStyles = DOM.getComputedStyle(this.element);\n    this.computedDelay =\n        Math.max(this.parseDurationString(\n                     computedStyles.getPropertyValue(this._stringPrefix + 'transition-delay')),\n                 this.parseDurationString(\n                     this.element.style.getPropertyValue(this._stringPrefix + 'transition-delay')));\n    this.computedDuration = Math.max(this.parseDurationString(computedStyles.getPropertyValue(\n                                         this._stringPrefix + 'transition-duration')),\n                                     this.parseDurationString(this.element.style.getPropertyValue(\n                                         this._stringPrefix + 'transition-duration')));\n    this.addEvents();\n  }\n\n  /**\n   * Applies the provided styles to the element\n   * @param styles\n   */\n  applyStyles(styles: {[key: string]: any}): void {\n    StringMapWrapper.forEach(styles, (value, key) => {\n      var dashCaseKey = camelCaseToDashCase(key);\n      if (isPresent(DOM.getStyle(this.element, dashCaseKey))) {\n        DOM.setStyle(this.element, dashCaseKey, value.toString());\n      } else {\n        DOM.setStyle(this.element, this._stringPrefix + dashCaseKey, value.toString());\n      }\n    });\n  }\n\n  /**\n   * Adds the provided classes to the element\n   * @param classes\n   */\n  addClasses(classes: string[]): void {\n    for (let i = 0, len = classes.length; i < len; i++) DOM.addClass(this.element, classes[i]);\n  }\n\n  /**\n   * Removes the provided classes from the element\n   * @param classes\n   */\n  removeClasses(classes: string[]): void {\n    for (let i = 0, len = classes.length; i < len; i++) DOM.removeClass(this.element, classes[i]);\n  }\n\n  /**\n   * Adds events to track when animations have finished\n   */\n  addEvents(): void {\n    if (this.totalTime > 0) {\n      this.eventClearFunctions.push(DOM.onAndCancel(\n          this.element, DOM.getTransitionEnd(), (event: any) => this.handleAnimationEvent(event)));\n    } else {\n      this.handleAnimationCompleted();\n    }\n  }\n\n  handleAnimationEvent(event: any): void {\n    let elapsedTime = Math.round(event.elapsedTime * 1000);\n    if (!this.browserDetails.elapsedTimeIncludesDelay) elapsedTime += this.computedDelay;\n    event.stopPropagation();\n    if (elapsedTime >= this.totalTime) this.handleAnimationCompleted();\n  }\n\n  /**\n   * Runs all animation callbacks and removes temporary classes\n   */\n  handleAnimationCompleted(): void {\n    this.removeClasses(this.data.animationClasses);\n    this.callbacks.forEach(callback => callback());\n    this.callbacks = [];\n    this.eventClearFunctions.forEach(fn => fn());\n    this.eventClearFunctions = [];\n    this.completed = true;\n  }\n\n  /**\n   * Adds animation callbacks to be called upon completion\n   * @param callback\n   * @returns {Animation}\n   */\n  onComplete(callback: Function): Animation {\n    if (this.completed) {\n      callback();\n    } else {\n      this.callbacks.push(callback);\n    }\n    return this;\n  }\n\n  /**\n   * Converts the duration string to the number of milliseconds\n   * @param duration\n   * @returns {number}\n   */\n  parseDurationString(duration: string): number {\n    var maxValue = 0;\n    // duration must have at least 2 characters to be valid. (number + type)\n    if (duration == null || duration.length < 2) {\n      return maxValue;\n    } else if (duration.substring(duration.length - 2) == 'ms') {\n      let value = NumberWrapper.parseInt(this.stripLetters(duration), 10);\n      if (value > maxValue) maxValue = value;\n    } else if (duration.substring(duration.length - 1) == 's') {\n      let ms = NumberWrapper.parseFloat(this.stripLetters(duration)) * 1000;\n      let value = Math.floor(ms);\n      if (value > maxValue) maxValue = value;\n    }\n    return maxValue;\n  }\n\n  /**\n   * Strips the letters from the duration string\n   * @param str\n   * @returns {string}\n   */\n  stripLetters(str: string): string {\n    return StringWrapper.replaceAll(str, RegExpWrapper.create('[^0-9]+$', ''), '');\n  }\n}\n"]}