animationFrames.js
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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.animationFrames = void 0;
var Observable_1 = require("../../Observable");
var performanceTimestampProvider_1 = require("../../scheduler/performanceTimestampProvider");
var animationFrameProvider_1 = require("../../scheduler/animationFrameProvider");
function animationFrames(timestampProvider) {
return timestampProvider ? animationFramesFactory(timestampProvider) : DEFAULT_ANIMATION_FRAMES;
}
exports.animationFrames = animationFrames;
function animationFramesFactory(timestampProvider) {
return new Observable_1.Observable(function (subscriber) {
var provider = timestampProvider || performanceTimestampProvider_1.performanceTimestampProvider;
var start = provider.now();
var id = 0;
var run = function () {
if (!subscriber.closed) {
id = animationFrameProvider_1.animationFrameProvider.requestAnimationFrame(function (timestamp) {
id = 0;
var now = provider.now();
subscriber.next({
timestamp: timestampProvider ? now : timestamp,
elapsed: now - start,
});
run();
});
}
};
run();
return function () {
if (id) {
animationFrameProvider_1.animationFrameProvider.cancelAnimationFrame(id);
}
};
});
}
var DEFAULT_ANIMATION_FRAMES = animationFramesFactory();
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