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Diffstat (limited to 'node_modules/rxjs/src/internal/operators/bufferCount.ts')
| -rw-r--r-- | node_modules/rxjs/src/internal/operators/bufferCount.ts | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/node_modules/rxjs/src/internal/operators/bufferCount.ts b/node_modules/rxjs/src/internal/operators/bufferCount.ts deleted file mode 100644 index 1d82d2c..0000000 --- a/node_modules/rxjs/src/internal/operators/bufferCount.ts +++ /dev/null @@ -1,120 +0,0 @@ -import { OperatorFunction } from '../types'; -import { operate } from '../util/lift'; -import { createOperatorSubscriber } from './OperatorSubscriber'; -import { arrRemove } from '../util/arrRemove'; - -/** - * Buffers the source Observable values until the size hits the maximum - * `bufferSize` given. - * - * <span class="informal">Collects values from the past as an array, and emits - * that array only when its size reaches `bufferSize`.</span> - * - *  - * - * Buffers a number of values from the source Observable by `bufferSize` then - * emits the buffer and clears it, and starts a new buffer each - * `startBufferEvery` values. If `startBufferEvery` is not provided or is - * `null`, then new buffers are started immediately at the start of the source - * and when each buffer closes and is emitted. - * - * ## Examples - * - * Emit the last two click events as an array - * - * ```ts - * import { fromEvent, bufferCount } from 'rxjs'; - * - * const clicks = fromEvent(document, 'click'); - * const buffered = clicks.pipe(bufferCount(2)); - * buffered.subscribe(x => console.log(x)); - * ``` - * - * On every click, emit the last two click events as an array - * - * ```ts - * import { fromEvent, bufferCount } from 'rxjs'; - * - * const clicks = fromEvent(document, 'click'); - * const buffered = clicks.pipe(bufferCount(2, 1)); - * buffered.subscribe(x => console.log(x)); - * ``` - * - * @see {@link buffer} - * @see {@link bufferTime} - * @see {@link bufferToggle} - * @see {@link bufferWhen} - * @see {@link pairwise} - * @see {@link windowCount} - * - * @param bufferSize The maximum size of the buffer emitted. - * @param startBufferEvery Interval at which to start a new buffer. - * For example if `startBufferEvery` is `2`, then a new buffer will be started - * on every other value from the source. A new buffer is started at the - * beginning of the source by default. - * @return A function that returns an Observable of arrays of buffered values. - */ -export function bufferCount<T>(bufferSize: number, startBufferEvery: number | null = null): OperatorFunction<T, T[]> { - // If no `startBufferEvery` value was supplied, then we're - // opening and closing on the bufferSize itself. - startBufferEvery = startBufferEvery ?? bufferSize; - - return operate((source, subscriber) => { - let buffers: T[][] = []; - let count = 0; - - source.subscribe( - createOperatorSubscriber( - subscriber, - (value) => { - let toEmit: T[][] | null = null; - - // Check to see if we need to start a buffer. - // This will start one at the first value, and then - // a new one every N after that. - if (count++ % startBufferEvery! === 0) { - buffers.push([]); - } - - // Push our value into our active buffers. - for (const buffer of buffers) { - buffer.push(value); - // Check to see if we're over the bufferSize - // if we are, record it so we can emit it later. - // If we emitted it now and removed it, it would - // mutate the `buffers` array while we're looping - // over it. - if (bufferSize <= buffer.length) { - toEmit = toEmit ?? []; - toEmit.push(buffer); - } - } - - if (toEmit) { - // We have found some buffers that are over the - // `bufferSize`. Emit them, and remove them from our - // buffers list. - for (const buffer of toEmit) { - arrRemove(buffers, buffer); - subscriber.next(buffer); - } - } - }, - () => { - // When the source completes, emit all of our - // active buffers. - for (const buffer of buffers) { - subscriber.next(buffer); - } - subscriber.complete(); - }, - // Pass all errors through to consumer. - undefined, - () => { - // Clean up our memory when we finalize - buffers = null!; - } - ) - ); - }); -} |
