angular2
Version:
Angular 2 - a web framework for modern web apps
70 lines • 8.07 kB
JavaScript
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") return Reflect.decorate(decorators, target, key, desc);
switch (arguments.length) {
case 2: return decorators.reduceRight(function(o, d) { return (d && d(o)) || o; }, target);
case 3: return decorators.reduceRight(function(o, d) { return (d && d(target, key)), void 0; }, void 0);
case 4: return decorators.reduceRight(function(o, d) { return (d && d(target, key, o)) || o; }, desc);
}
};
var __metadata = (this && this.__metadata) || function (k, v) {
if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
import { Injectable } from 'angular2/src/core/di';
import { Math } from 'angular2/src/facade/math';
import { DOM } from 'angular2/src/platform/dom/dom_adapter';
export let BrowserDetails = class {
constructor() {
this.elapsedTimeIncludesDelay = false;
this.doesElapsedTimeIncludesDelay();
}
/**
* Determines if `event.elapsedTime` includes transition delay in the current browser. At this
* time, Chrome and Opera seem to be the only browsers that include this.
*/
doesElapsedTimeIncludesDelay() {
var div = DOM.createElement('div');
DOM.setAttribute(div, 'style', `position: absolute; top: -9999px; left: -9999px; width: 1px;
height: 1px; transition: all 1ms linear 1ms;`);
// Firefox requires that we wait for 2 frames for some reason
this.raf(timestamp => {
DOM.on(div, 'transitionend', (event) => {
var elapsed = Math.round(event.elapsedTime * 1000);
this.elapsedTimeIncludesDelay = elapsed == 2;
DOM.remove(div);
});
DOM.setStyle(div, 'width', '2px');
}, 2);
}
raf(callback, frames = 1) {
var queue = new RafQueue(callback, frames);
return () => queue.cancel();
}
};
BrowserDetails = __decorate([
Injectable(),
__metadata('design:paramtypes', [])
], BrowserDetails);
class RafQueue {
constructor(callback, frames) {
this.callback = callback;
this.frames = frames;
this._raf();
}
_raf() {
this.currentFrameId = DOM.requestAnimationFrame(timestamp => this._nextFrame(timestamp));
}
_nextFrame(timestamp) {
this.frames--;
if (this.frames > 0) {
this._raf();
}
else {
this.callback(timestamp);
}
}
cancel() {
DOM.cancelAnimationFrame(this.currentFrameId);
this.currentFrameId = null;
}
}
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AodGhpcy5mcmFtZXMgPiAwKSB7XG4gICAgICB0aGlzLl9yYWYoKTtcbiAgICB9IGVsc2Uge1xuICAgICAgdGhpcy5jYWxsYmFjayh0aW1lc3RhbXApO1xuICAgIH1cbiAgfVxuICBjYW5jZWwoKSB7XG4gICAgRE9NLmNhbmNlbEFuaW1hdGlvbkZyYW1lKHRoaXMuY3VycmVudEZyYW1lSWQpO1xuICAgIHRoaXMuY3VycmVudEZyYW1lSWQgPSBudWxsO1xuICB9XG59XG4iXX0=