work.suroh.tk/node_modules/rxjs/operators/windowCount.js.map

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The output Observable emits windows every `startWindowEvery`\n * items, each containing no more than `windowSize` items. When the source\n * Observable completes or encounters an error, the output Observable emits\n * the current window and propagates the notification from the source\n * Observable. If `startWindowEvery` is not provided, then new windows are\n * started immediately at the start of the source and when each window completes\n * with size `windowSize`.\n *\n * @example <caption>Ignore every 3rd click event, starting from the first one</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.windowCount(3)\n * .map(win => win.skip(1)) // skip first of every 3 clicks\n * .mergeAll(); // flatten the Observable-of-Observables\n * result.subscribe(x => console.log(x));\n *\n * @example <caption>Ignore every 3rd click event, starting from the third one</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.windowCount(2, 3)\n * .mergeAll(); // flatten the Observable-of-Observables\n * result.subscribe(x => console.log(x));\n *\n * @see {@link window}\n * @see {@link windowTime}\n * @see {@link windowToggle}\n * @see {@link windowWhen}\n * @see {@link bufferCount}\n *\n * @param {number} windowSize The maximum number of values emitted by each\n * window.\n * @param {number} [startWindowEvery] Interval at which to start a new window.\n * For example if `startWindowEvery` is `2`, then a new window will be started\n * on every other value from the source. A new window is started at the\n * beginning of the source by default.\n * @return {Observable<Observable<T>>} An Observable of windows, which in turn\n * are Observable of values.\n * @method windowCount\n * @owner Observable\n */\nexport function windowCount<T>(windowSize: number,\n startWindowEvery: number = 0): OperatorFunction<T, Observable<T>> {\n return function windowCountOperatorFunction(source: Observable<T>) {\n return source.lift(new WindowCountOperator<T>(windowSize, startWindowEvery));\n };\n}\n\nclass WindowCountOperator<T> implements Operator<T, Observable<T>> {\n\n constructor(private windowSize: number,\n private startWindowEvery: number) {\n }\n\n call(subscriber: Subscriber<Observable<T>>, source: any): any {\n return source.subscribe(new WindowCountSubscriber(subscriber, this.windowSize, this.startWindowEvery));\n }\n}\n\n/**\n * We need this JSDoc comment for affecting ESDoc.\n * @ignore\n * @extends {Ignored}\n */\nclass WindowCountSubscriber<T> extends Subscriber<T> {\n private windows: Subject<T>[] = [ new Subject<T>() ];\n private count: number = 0;\n\n constructor(protected destination: Subscriber<Observable<T>>,\n private windowSize: number,\n private startWindowEvery: number) {\n super(destination);\n destination.next(this.windows[0]);\n }\n\n protected _next(value: T) {\n const startWindowEvery = (this.startWindowEvery > 0) ? this.startWindowEvery : this.windowSize;\n const destination = this.destination;\n const windowSize = this.windowSize;\n const windows = this.windows;\n const len = windows.length;\n\n for (let i = 0; i < len && !this.closed; i++) {\n windows[i].next(value);\n }\n const c = this.count - windowSize + 1;\n if (c >= 0 && c % startWindowEvery === 0 && !this.closed) {\n windows.shift().complete();\n }\n if (++this.count % startWindowEvery === 0 && !this.closed) {\n const window = new Subject<T>();\n windows.push(window);\n destination.next(window);\n }\n }\n\n protected _error(err: any) {\n const windows = this.windows;\n if (windows) {\n while (windows.length > 0 && !this.closed) {\n windows.shift().error(err);\n }\n }\n this.destination.error(err);\n }\n\n protected _complete() {\n const windows = this.windows;\n if (windows) {\n while (windows.length > 0 && !this.closed) {\n windows.shift().complete();\n }\n }\n this.destination.complete();\n }\n\n /** @deprecated internal use only */ _unsubscribe() {\n this.count = 0;\n this.windows = null;\n }\n}\n"]}