1 | import { async } from '../scheduler/async';
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2 | import { Subscriber } from '../Subscriber';
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3 | import { isScheduler } from '../util/isScheduler';
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4 | export function bufferTime(bufferTimeSpan) {
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5 | let length = arguments.length;
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6 | let scheduler = async;
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7 | if (isScheduler(arguments[arguments.length - 1])) {
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8 | scheduler = arguments[arguments.length - 1];
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9 | length--;
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10 | }
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11 | let bufferCreationInterval = null;
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12 | if (length >= 2) {
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13 | bufferCreationInterval = arguments[1];
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14 | }
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15 | let maxBufferSize = Number.POSITIVE_INFINITY;
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16 | if (length >= 3) {
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17 | maxBufferSize = arguments[2];
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18 | }
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19 | return function bufferTimeOperatorFunction(source) {
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20 | return source.lift(new BufferTimeOperator(bufferTimeSpan, bufferCreationInterval, maxBufferSize, scheduler));
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21 | };
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22 | }
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23 | class BufferTimeOperator {
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24 | constructor(bufferTimeSpan, bufferCreationInterval, maxBufferSize, scheduler) {
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25 | this.bufferTimeSpan = bufferTimeSpan;
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26 | this.bufferCreationInterval = bufferCreationInterval;
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27 | this.maxBufferSize = maxBufferSize;
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28 | this.scheduler = scheduler;
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29 | }
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30 | call(subscriber, source) {
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31 | return source.subscribe(new BufferTimeSubscriber(subscriber, this.bufferTimeSpan, this.bufferCreationInterval, this.maxBufferSize, this.scheduler));
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32 | }
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33 | }
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34 | class Context {
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35 | constructor() {
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36 | this.buffer = [];
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37 | }
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38 | }
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39 | class BufferTimeSubscriber extends Subscriber {
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40 | constructor(destination, bufferTimeSpan, bufferCreationInterval, maxBufferSize, scheduler) {
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41 | super(destination);
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42 | this.bufferTimeSpan = bufferTimeSpan;
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43 | this.bufferCreationInterval = bufferCreationInterval;
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44 | this.maxBufferSize = maxBufferSize;
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45 | this.scheduler = scheduler;
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46 | this.contexts = [];
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47 | const context = this.openContext();
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48 | this.timespanOnly = bufferCreationInterval == null || bufferCreationInterval < 0;
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49 | if (this.timespanOnly) {
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50 | const timeSpanOnlyState = { subscriber: this, context, bufferTimeSpan };
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51 | this.add(context.closeAction = scheduler.schedule(dispatchBufferTimeSpanOnly, bufferTimeSpan, timeSpanOnlyState));
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52 | }
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53 | else {
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54 | const closeState = { subscriber: this, context };
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55 | const creationState = { bufferTimeSpan, bufferCreationInterval, subscriber: this, scheduler };
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56 | this.add(context.closeAction = scheduler.schedule(dispatchBufferClose, bufferTimeSpan, closeState));
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57 | this.add(scheduler.schedule(dispatchBufferCreation, bufferCreationInterval, creationState));
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58 | }
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59 | }
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60 | _next(value) {
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61 | const contexts = this.contexts;
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62 | const len = contexts.length;
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63 | let filledBufferContext;
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64 | for (let i = 0; i < len; i++) {
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65 | const context = contexts[i];
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66 | const buffer = context.buffer;
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67 | buffer.push(value);
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68 | if (buffer.length == this.maxBufferSize) {
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69 | filledBufferContext = context;
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70 | }
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71 | }
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72 | if (filledBufferContext) {
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73 | this.onBufferFull(filledBufferContext);
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74 | }
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75 | }
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76 | _error(err) {
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77 | this.contexts.length = 0;
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78 | super._error(err);
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79 | }
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80 | _complete() {
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81 | const { contexts, destination } = this;
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82 | while (contexts.length > 0) {
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83 | const context = contexts.shift();
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84 | destination.next(context.buffer);
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85 | }
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86 | super._complete();
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87 | }
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88 | _unsubscribe() {
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89 | this.contexts = null;
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90 | }
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91 | onBufferFull(context) {
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92 | this.closeContext(context);
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93 | const closeAction = context.closeAction;
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94 | closeAction.unsubscribe();
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95 | this.remove(closeAction);
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96 | if (!this.closed && this.timespanOnly) {
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97 | context = this.openContext();
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98 | const bufferTimeSpan = this.bufferTimeSpan;
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99 | const timeSpanOnlyState = { subscriber: this, context, bufferTimeSpan };
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100 | this.add(context.closeAction = this.scheduler.schedule(dispatchBufferTimeSpanOnly, bufferTimeSpan, timeSpanOnlyState));
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101 | }
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102 | }
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103 | openContext() {
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104 | const context = new Context();
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105 | this.contexts.push(context);
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106 | return context;
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107 | }
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108 | closeContext(context) {
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109 | this.destination.next(context.buffer);
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110 | const contexts = this.contexts;
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111 | const spliceIndex = contexts ? contexts.indexOf(context) : -1;
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112 | if (spliceIndex >= 0) {
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113 | contexts.splice(contexts.indexOf(context), 1);
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114 | }
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115 | }
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116 | }
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117 | function dispatchBufferTimeSpanOnly(state) {
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118 | const subscriber = state.subscriber;
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119 | const prevContext = state.context;
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120 | if (prevContext) {
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121 | subscriber.closeContext(prevContext);
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122 | }
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123 | if (!subscriber.closed) {
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124 | state.context = subscriber.openContext();
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125 | state.context.closeAction = this.schedule(state, state.bufferTimeSpan);
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126 | }
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127 | }
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128 | function dispatchBufferCreation(state) {
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129 | const { bufferCreationInterval, bufferTimeSpan, subscriber, scheduler } = state;
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130 | const context = subscriber.openContext();
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131 | const action = this;
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132 | if (!subscriber.closed) {
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133 | subscriber.add(context.closeAction = scheduler.schedule(dispatchBufferClose, bufferTimeSpan, { subscriber, context }));
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134 | action.schedule(state, bufferCreationInterval);
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135 | }
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136 | }
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137 | function dispatchBufferClose(arg) {
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138 | const { subscriber, context } = arg;
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139 | subscriber.closeContext(context);
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140 | }
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141 | //# sourceMappingURL=bufferTime.js.map |
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