hugoWebsite/node_modules/rxjs/dist/esm5/internal/observable/dom/animationFrames.js

34 lines
1.3 KiB
JavaScript

import { Observable } from '../../Observable';
import { performanceTimestampProvider } from '../../scheduler/performanceTimestampProvider';
import { animationFrameProvider } from '../../scheduler/animationFrameProvider';
export function animationFrames(timestampProvider) {
return timestampProvider ? animationFramesFactory(timestampProvider) : DEFAULT_ANIMATION_FRAMES;
}
function animationFramesFactory(timestampProvider) {
return new Observable(function (subscriber) {
var provider = timestampProvider || performanceTimestampProvider;
var start = provider.now();
var id = 0;
var run = function () {
if (!subscriber.closed) {
id = 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.cancelAnimationFrame(id);
}
};
});
}
var DEFAULT_ANIMATION_FRAMES = animationFramesFactory();
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