[6a3a178] | 1 | import { fromArray } from './fromArray';
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| 2 | import { isArray } from '../util/isArray';
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| 3 | import { Subscriber } from '../Subscriber';
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| 4 | import { iterator as Symbol_iterator } from '../../internal/symbol/iterator';
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| 5 | import { SimpleOuterSubscriber, SimpleInnerSubscriber, innerSubscribe } from '../innerSubscribe';
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| 6 | export function zip(...observables) {
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| 7 | const resultSelector = observables[observables.length - 1];
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| 8 | if (typeof resultSelector === 'function') {
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| 9 | observables.pop();
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| 10 | }
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| 11 | return fromArray(observables, undefined).lift(new ZipOperator(resultSelector));
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| 12 | }
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| 13 | export class ZipOperator {
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| 14 | constructor(resultSelector) {
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| 15 | this.resultSelector = resultSelector;
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| 16 | }
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| 17 | call(subscriber, source) {
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| 18 | return source.subscribe(new ZipSubscriber(subscriber, this.resultSelector));
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| 19 | }
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| 20 | }
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| 21 | export class ZipSubscriber extends Subscriber {
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| 22 | constructor(destination, resultSelector, values = Object.create(null)) {
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| 23 | super(destination);
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| 24 | this.resultSelector = resultSelector;
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| 25 | this.iterators = [];
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| 26 | this.active = 0;
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| 27 | this.resultSelector = (typeof resultSelector === 'function') ? resultSelector : undefined;
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| 28 | }
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| 29 | _next(value) {
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| 30 | const iterators = this.iterators;
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| 31 | if (isArray(value)) {
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| 32 | iterators.push(new StaticArrayIterator(value));
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| 33 | }
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| 34 | else if (typeof value[Symbol_iterator] === 'function') {
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| 35 | iterators.push(new StaticIterator(value[Symbol_iterator]()));
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| 36 | }
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| 37 | else {
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| 38 | iterators.push(new ZipBufferIterator(this.destination, this, value));
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| 39 | }
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| 40 | }
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| 41 | _complete() {
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| 42 | const iterators = this.iterators;
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| 43 | const len = iterators.length;
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| 44 | this.unsubscribe();
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| 45 | if (len === 0) {
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| 46 | this.destination.complete();
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| 47 | return;
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| 48 | }
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| 49 | this.active = len;
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| 50 | for (let i = 0; i < len; i++) {
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| 51 | let iterator = iterators[i];
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| 52 | if (iterator.stillUnsubscribed) {
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| 53 | const destination = this.destination;
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| 54 | destination.add(iterator.subscribe());
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| 55 | }
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| 56 | else {
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| 57 | this.active--;
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| 58 | }
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| 59 | }
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| 60 | }
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| 61 | notifyInactive() {
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| 62 | this.active--;
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| 63 | if (this.active === 0) {
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| 64 | this.destination.complete();
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| 65 | }
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| 66 | }
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| 67 | checkIterators() {
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| 68 | const iterators = this.iterators;
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| 69 | const len = iterators.length;
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| 70 | const destination = this.destination;
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| 71 | for (let i = 0; i < len; i++) {
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| 72 | let iterator = iterators[i];
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| 73 | if (typeof iterator.hasValue === 'function' && !iterator.hasValue()) {
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| 74 | return;
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| 75 | }
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| 76 | }
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| 77 | let shouldComplete = false;
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| 78 | const args = [];
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| 79 | for (let i = 0; i < len; i++) {
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| 80 | let iterator = iterators[i];
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| 81 | let result = iterator.next();
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| 82 | if (iterator.hasCompleted()) {
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| 83 | shouldComplete = true;
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| 84 | }
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| 85 | if (result.done) {
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| 86 | destination.complete();
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| 87 | return;
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| 88 | }
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| 89 | args.push(result.value);
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| 90 | }
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| 91 | if (this.resultSelector) {
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| 92 | this._tryresultSelector(args);
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| 93 | }
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| 94 | else {
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| 95 | destination.next(args);
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| 96 | }
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| 97 | if (shouldComplete) {
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| 98 | destination.complete();
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| 99 | }
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| 100 | }
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| 101 | _tryresultSelector(args) {
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| 102 | let result;
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| 103 | try {
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| 104 | result = this.resultSelector.apply(this, args);
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| 105 | }
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| 106 | catch (err) {
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| 107 | this.destination.error(err);
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| 108 | return;
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| 109 | }
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| 110 | this.destination.next(result);
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| 111 | }
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| 112 | }
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| 113 | class StaticIterator {
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| 114 | constructor(iterator) {
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| 115 | this.iterator = iterator;
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| 116 | this.nextResult = iterator.next();
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| 117 | }
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| 118 | hasValue() {
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| 119 | return true;
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| 120 | }
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| 121 | next() {
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| 122 | const result = this.nextResult;
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| 123 | this.nextResult = this.iterator.next();
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| 124 | return result;
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| 125 | }
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| 126 | hasCompleted() {
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| 127 | const nextResult = this.nextResult;
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| 128 | return Boolean(nextResult && nextResult.done);
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| 129 | }
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| 130 | }
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| 131 | class StaticArrayIterator {
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| 132 | constructor(array) {
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| 133 | this.array = array;
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| 134 | this.index = 0;
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| 135 | this.length = 0;
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| 136 | this.length = array.length;
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| 137 | }
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| 138 | [Symbol_iterator]() {
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| 139 | return this;
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| 140 | }
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| 141 | next(value) {
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| 142 | const i = this.index++;
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| 143 | const array = this.array;
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| 144 | return i < this.length ? { value: array[i], done: false } : { value: null, done: true };
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| 145 | }
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| 146 | hasValue() {
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| 147 | return this.array.length > this.index;
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| 148 | }
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| 149 | hasCompleted() {
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| 150 | return this.array.length === this.index;
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| 151 | }
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| 152 | }
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| 153 | class ZipBufferIterator extends SimpleOuterSubscriber {
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| 154 | constructor(destination, parent, observable) {
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| 155 | super(destination);
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| 156 | this.parent = parent;
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| 157 | this.observable = observable;
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| 158 | this.stillUnsubscribed = true;
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| 159 | this.buffer = [];
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| 160 | this.isComplete = false;
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| 161 | }
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| 162 | [Symbol_iterator]() {
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| 163 | return this;
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| 164 | }
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| 165 | next() {
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| 166 | const buffer = this.buffer;
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| 167 | if (buffer.length === 0 && this.isComplete) {
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| 168 | return { value: null, done: true };
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| 169 | }
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| 170 | else {
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| 171 | return { value: buffer.shift(), done: false };
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| 172 | }
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| 173 | }
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| 174 | hasValue() {
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| 175 | return this.buffer.length > 0;
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| 176 | }
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| 177 | hasCompleted() {
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| 178 | return this.buffer.length === 0 && this.isComplete;
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| 179 | }
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| 180 | notifyComplete() {
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| 181 | if (this.buffer.length > 0) {
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| 182 | this.isComplete = true;
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| 183 | this.parent.notifyInactive();
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| 184 | }
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| 185 | else {
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| 186 | this.destination.complete();
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| 187 | }
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| 188 | }
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| 189 | notifyNext(innerValue) {
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| 190 | this.buffer.push(innerValue);
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| 191 | this.parent.checkIterators();
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| 192 | }
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| 193 | subscribe() {
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| 194 | return innerSubscribe(this.observable, new SimpleInnerSubscriber(this));
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| 195 | }
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| 196 | }
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| 197 | //# sourceMappingURL=zip.js.map |
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