@angular/animations
Version:
Angular - animations integration with web-animations
113 lines • 17.6 kB
JavaScript
import { allowPreviousPlayerStylesMerge, balancePreviousStylesIntoKeyframes } from '../../util';
import { containsElement, hypenatePropsObject, invokeQuery, matchesElement, validateStyleProperty } from '../shared';
import { packageNonAnimatableStyles } from '../special_cased_styles';
import { CssKeyframesPlayer } from './css_keyframes_player';
import { DirectStylePlayer } from './direct_style_player';
const KEYFRAMES_NAME_PREFIX = 'gen_css_kf_';
const TAB_SPACE = ' ';
export class CssKeyframesDriver {
constructor() {
this._count = 0;
this._head = document.querySelector('head');
this._warningIssued = false;
}
validateStyleProperty(prop) {
return validateStyleProperty(prop);
}
matchesElement(element, selector) {
return matchesElement(element, selector);
}
containsElement(elm1, elm2) {
return containsElement(elm1, elm2);
}
query(element, selector, multi) {
return invokeQuery(element, selector, multi);
}
computeStyle(element, prop, defaultValue) {
return window.getComputedStyle(element)[prop];
}
buildKeyframeElement(element, name, keyframes) {
keyframes = keyframes.map(kf => hypenatePropsObject(kf));
let keyframeStr = `@keyframes ${name} {\n`;
let tab = '';
keyframes.forEach(kf => {
tab = TAB_SPACE;
const offset = parseFloat(kf['offset']);
keyframeStr += `${tab}${offset * 100}% {\n`;
tab += TAB_SPACE;
Object.keys(kf).forEach(prop => {
const value = kf[prop];
switch (prop) {
case 'offset':
return;
case 'easing':
if (value) {
keyframeStr += `${tab}animation-timing-function: ${value};\n`;
}
return;
default:
keyframeStr += `${tab}${prop}: ${value};\n`;
return;
}
});
keyframeStr += `${tab}}\n`;
});
keyframeStr += `}\n`;
const kfElm = document.createElement('style');
kfElm.innerHTML = keyframeStr;
return kfElm;
}
animate(element, keyframes, duration, delay, easing, previousPlayers = [], scrubberAccessRequested) {
if (scrubberAccessRequested) {
this._notifyFaultyScrubber();
}
const previousCssKeyframePlayers = previousPlayers.filter(player => player instanceof CssKeyframesPlayer);
const previousStyles = {};
if (allowPreviousPlayerStylesMerge(duration, delay)) {
previousCssKeyframePlayers.forEach(player => {
let styles = player.currentSnapshot;
Object.keys(styles).forEach(prop => previousStyles[prop] = styles[prop]);
});
}
keyframes = balancePreviousStylesIntoKeyframes(element, keyframes, previousStyles);
const finalStyles = flattenKeyframesIntoStyles(keyframes);
// if there is no animation then there is no point in applying
// styles and waiting for an event to get fired. This causes lag.
// It's better to just directly apply the styles to the element
// via the direct styling animation player.
if (duration == 0) {
return new DirectStylePlayer(element, finalStyles);
}
const animationName = `${KEYFRAMES_NAME_PREFIX}${this._count++}`;
const kfElm = this.buildKeyframeElement(element, animationName, keyframes);
document.querySelector('head').appendChild(kfElm);
const specialStyles = packageNonAnimatableStyles(element, keyframes);
const player = new CssKeyframesPlayer(element, keyframes, animationName, duration, delay, easing, finalStyles, specialStyles);
player.onDestroy(() => removeElement(kfElm));
return player;
}
_notifyFaultyScrubber() {
if (!this._warningIssued) {
console.warn('@angular/animations: please load the web-animations.js polyfill to allow programmatic access...\n', ' visit http://bit.ly/IWukam to learn more about using the web-animation-js polyfill.');
this._warningIssued = true;
}
}
}
function flattenKeyframesIntoStyles(keyframes) {
let flatKeyframes = {};
if (keyframes) {
const kfs = Array.isArray(keyframes) ? keyframes : [keyframes];
kfs.forEach(kf => {
Object.keys(kf).forEach(prop => {
if (prop == 'offset' || prop == 'easing')
return;
flatKeyframes[prop] = kf[prop];
});
});
}
return flatKeyframes;
}
function removeElement(node) {
node.parentNode.removeChild(node);
}
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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, ɵStyleData} from '@angular/animations';\n\nimport {allowPreviousPlayerStylesMerge, balancePreviousStylesIntoKeyframes, computeStyle} from '../../util';\nimport {AnimationDriver} from '../animation_driver';\nimport {containsElement, hypenatePropsObject, invokeQuery, matchesElement, validateStyleProperty} from '../shared';\nimport {packageNonAnimatableStyles} from '../special_cased_styles';\n\nimport {CssKeyframesPlayer} from './css_keyframes_player';\nimport {DirectStylePlayer} from './direct_style_player';\n\nconst KEYFRAMES_NAME_PREFIX = 'gen_css_kf_';\nconst TAB_SPACE = ' ';\n\nexport class CssKeyframesDriver implements AnimationDriver {\n  private _count = 0;\n  private readonly _head: any = document.querySelector('head');\n  private _warningIssued = false;\n\n  validateStyleProperty(prop: string): boolean {\n    return validateStyleProperty(prop);\n  }\n\n  matchesElement(element: any, selector: string): boolean {\n    return matchesElement(element, selector);\n  }\n\n  containsElement(elm1: any, elm2: any): boolean {\n    return containsElement(elm1, elm2);\n  }\n\n  query(element: any, selector: string, multi: boolean): any[] {\n    return invokeQuery(element, selector, multi);\n  }\n\n  computeStyle(element: any, prop: string, defaultValue?: string): string {\n    return (window.getComputedStyle(element) as any)[prop] as string;\n  }\n\n  buildKeyframeElement(element: any, name: string, keyframes: {[key: string]: any}[]): any {\n    keyframes = keyframes.map(kf => hypenatePropsObject(kf));\n    let keyframeStr = `@keyframes ${name} {\\n`;\n    let tab = '';\n    keyframes.forEach(kf => {\n      tab = TAB_SPACE;\n      const offset = parseFloat(kf['offset']);\n      keyframeStr += `${tab}${offset * 100}% {\\n`;\n      tab += TAB_SPACE;\n      Object.keys(kf).forEach(prop => {\n        const value = kf[prop];\n        switch (prop) {\n          case 'offset':\n            return;\n          case 'easing':\n            if (value) {\n              keyframeStr += `${tab}animation-timing-function: ${value};\\n`;\n            }\n            return;\n          default:\n            keyframeStr += `${tab}${prop}: ${value};\\n`;\n            return;\n        }\n      });\n      keyframeStr += `${tab}}\\n`;\n    });\n    keyframeStr += `}\\n`;\n\n    const kfElm = document.createElement('style');\n    kfElm.innerHTML = keyframeStr;\n    return kfElm;\n  }\n\n  animate(\n      element: any, keyframes: ɵStyleData[], duration: number, delay: number, easing: string,\n      previousPlayers: AnimationPlayer[] = [], scrubberAccessRequested?: boolean): AnimationPlayer {\n    if (scrubberAccessRequested) {\n      this._notifyFaultyScrubber();\n    }\n\n    const previousCssKeyframePlayers = <CssKeyframesPlayer[]>previousPlayers.filter(\n        player => player instanceof CssKeyframesPlayer);\n\n    const previousStyles: {[key: string]: any} = {};\n\n    if (allowPreviousPlayerStylesMerge(duration, delay)) {\n      previousCssKeyframePlayers.forEach(player => {\n        let styles = player.currentSnapshot;\n        Object.keys(styles).forEach(prop => previousStyles[prop] = styles[prop]);\n      });\n    }\n\n    keyframes = balancePreviousStylesIntoKeyframes(element, keyframes, previousStyles);\n    const finalStyles = flattenKeyframesIntoStyles(keyframes);\n\n    // if there is no animation then there is no point in applying\n    // styles and waiting for an event to get fired. This causes lag.\n    // It's better to just directly apply the styles to the element\n    // via the direct styling animation player.\n    if (duration == 0) {\n      return new DirectStylePlayer(element, finalStyles);\n    }\n\n    const animationName = `${KEYFRAMES_NAME_PREFIX}${this._count++}`;\n    const kfElm = this.buildKeyframeElement(element, animationName, keyframes);\n    document.querySelector('head')!.appendChild(kfElm);\n\n    const specialStyles = packageNonAnimatableStyles(element, keyframes);\n    const player = new CssKeyframesPlayer(\n        element, keyframes, animationName, duration, delay, easing, finalStyles, specialStyles);\n\n    player.onDestroy(() => removeElement(kfElm));\n    return player;\n  }\n\n  private _notifyFaultyScrubber() {\n    if (!this._warningIssued) {\n      console.warn(\n          '@angular/animations: please load the web-animations.js polyfill to allow programmatic access...\\n',\n          '  visit http://bit.ly/IWukam to learn more about using the web-animation-js polyfill.');\n      this._warningIssued = true;\n    }\n  }\n}\n\nfunction flattenKeyframesIntoStyles(keyframes: null|{[key: string]: any}|\n                                    {[key: string]: any}[]): {[key: string]: any} {\n  let flatKeyframes: {[key: string]: any} = {};\n  if (keyframes) {\n    const kfs = Array.isArray(keyframes) ? keyframes : [keyframes];\n    kfs.forEach(kf => {\n      Object.keys(kf).forEach(prop => {\n        if (prop == 'offset' || prop == 'easing') return;\n        flatKeyframes[prop] = kf[prop];\n      });\n    });\n  }\n  return flatKeyframes;\n}\n\nfunction removeElement(node: any) {\n  node.parentNode.removeChild(node);\n}\n"]}