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node_modules/rxjs/_esm2015/internal/operators/bufferTime.js
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141
node_modules/rxjs/_esm2015/internal/operators/bufferTime.js
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import { async } from '../scheduler/async';
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import { Subscriber } from '../Subscriber';
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import { isScheduler } from '../util/isScheduler';
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export function bufferTime(bufferTimeSpan) {
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let length = arguments.length;
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let scheduler = async;
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if (isScheduler(arguments[arguments.length - 1])) {
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scheduler = arguments[arguments.length - 1];
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length--;
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}
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let bufferCreationInterval = null;
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if (length >= 2) {
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bufferCreationInterval = arguments[1];
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}
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let maxBufferSize = Number.POSITIVE_INFINITY;
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if (length >= 3) {
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maxBufferSize = arguments[2];
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}
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return function bufferTimeOperatorFunction(source) {
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return source.lift(new BufferTimeOperator(bufferTimeSpan, bufferCreationInterval, maxBufferSize, scheduler));
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};
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}
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class BufferTimeOperator {
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constructor(bufferTimeSpan, bufferCreationInterval, maxBufferSize, scheduler) {
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this.bufferTimeSpan = bufferTimeSpan;
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this.bufferCreationInterval = bufferCreationInterval;
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this.maxBufferSize = maxBufferSize;
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this.scheduler = scheduler;
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}
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call(subscriber, source) {
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return source.subscribe(new BufferTimeSubscriber(subscriber, this.bufferTimeSpan, this.bufferCreationInterval, this.maxBufferSize, this.scheduler));
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}
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}
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class Context {
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constructor() {
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this.buffer = [];
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}
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}
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class BufferTimeSubscriber extends Subscriber {
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constructor(destination, bufferTimeSpan, bufferCreationInterval, maxBufferSize, scheduler) {
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super(destination);
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this.bufferTimeSpan = bufferTimeSpan;
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this.bufferCreationInterval = bufferCreationInterval;
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this.maxBufferSize = maxBufferSize;
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this.scheduler = scheduler;
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this.contexts = [];
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const context = this.openContext();
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this.timespanOnly = bufferCreationInterval == null || bufferCreationInterval < 0;
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if (this.timespanOnly) {
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const timeSpanOnlyState = { subscriber: this, context, bufferTimeSpan };
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this.add(context.closeAction = scheduler.schedule(dispatchBufferTimeSpanOnly, bufferTimeSpan, timeSpanOnlyState));
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}
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else {
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const closeState = { subscriber: this, context };
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const creationState = { bufferTimeSpan, bufferCreationInterval, subscriber: this, scheduler };
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this.add(context.closeAction = scheduler.schedule(dispatchBufferClose, bufferTimeSpan, closeState));
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this.add(scheduler.schedule(dispatchBufferCreation, bufferCreationInterval, creationState));
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}
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}
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_next(value) {
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const contexts = this.contexts;
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const len = contexts.length;
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let filledBufferContext;
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for (let i = 0; i < len; i++) {
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const context = contexts[i];
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const buffer = context.buffer;
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buffer.push(value);
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if (buffer.length == this.maxBufferSize) {
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filledBufferContext = context;
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}
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}
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if (filledBufferContext) {
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this.onBufferFull(filledBufferContext);
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}
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}
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_error(err) {
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this.contexts.length = 0;
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super._error(err);
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}
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_complete() {
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const { contexts, destination } = this;
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while (contexts.length > 0) {
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const context = contexts.shift();
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destination.next(context.buffer);
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}
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super._complete();
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}
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_unsubscribe() {
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this.contexts = null;
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}
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onBufferFull(context) {
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this.closeContext(context);
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const closeAction = context.closeAction;
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closeAction.unsubscribe();
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this.remove(closeAction);
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if (!this.closed && this.timespanOnly) {
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context = this.openContext();
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const bufferTimeSpan = this.bufferTimeSpan;
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const timeSpanOnlyState = { subscriber: this, context, bufferTimeSpan };
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this.add(context.closeAction = this.scheduler.schedule(dispatchBufferTimeSpanOnly, bufferTimeSpan, timeSpanOnlyState));
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}
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}
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openContext() {
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const context = new Context();
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this.contexts.push(context);
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return context;
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}
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closeContext(context) {
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this.destination.next(context.buffer);
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const contexts = this.contexts;
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const spliceIndex = contexts ? contexts.indexOf(context) : -1;
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if (spliceIndex >= 0) {
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contexts.splice(contexts.indexOf(context), 1);
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}
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}
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}
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function dispatchBufferTimeSpanOnly(state) {
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const subscriber = state.subscriber;
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const prevContext = state.context;
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if (prevContext) {
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subscriber.closeContext(prevContext);
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}
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if (!subscriber.closed) {
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state.context = subscriber.openContext();
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state.context.closeAction = this.schedule(state, state.bufferTimeSpan);
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}
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}
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function dispatchBufferCreation(state) {
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const { bufferCreationInterval, bufferTimeSpan, subscriber, scheduler } = state;
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const context = subscriber.openContext();
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const action = this;
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if (!subscriber.closed) {
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subscriber.add(context.closeAction = scheduler.schedule(dispatchBufferClose, bufferTimeSpan, { subscriber, context }));
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action.schedule(state, bufferCreationInterval);
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}
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}
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function dispatchBufferClose(arg) {
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const { subscriber, context } = arg;
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subscriber.closeContext(context);
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}
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//# sourceMappingURL=bufferTime.js.map
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