34 lines
1.3 KiB
JavaScript
34 lines
1.3 KiB
JavaScript
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import { Observable } from '../../Observable';
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import { performanceTimestampProvider } from '../../scheduler/performanceTimestampProvider';
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import { animationFrameProvider } from '../../scheduler/animationFrameProvider';
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export function animationFrames(timestampProvider) {
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return timestampProvider ? animationFramesFactory(timestampProvider) : DEFAULT_ANIMATION_FRAMES;
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}
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function animationFramesFactory(timestampProvider) {
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return new Observable((subscriber) => {
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const provider = timestampProvider || performanceTimestampProvider;
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const start = provider.now();
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let id = 0;
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const run = () => {
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if (!subscriber.closed) {
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id = animationFrameProvider.requestAnimationFrame((timestamp) => {
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id = 0;
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const now = provider.now();
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subscriber.next({
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timestamp: timestampProvider ? now : timestamp,
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elapsed: now - start,
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});
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run();
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});
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}
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};
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run();
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return () => {
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if (id) {
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animationFrameProvider.cancelAnimationFrame(id);
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}
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};
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});
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}
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const DEFAULT_ANIMATION_FRAMES = animationFramesFactory();
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//# sourceMappingURL=animationFrames.js.map
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