1 | ;
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2 | Object.defineProperty(exports, "__esModule", { value: true });
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3 | var index_1 = require("../index");
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4 | var DOMEventProducer = /** @class */ (function () {
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5 | function DOMEventProducer(node, eventType, useCapture) {
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6 | this.node = node;
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7 | this.eventType = eventType;
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8 | this.useCapture = useCapture;
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9 | this.type = 'fromEvent';
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10 | }
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11 | DOMEventProducer.prototype._start = function (out) {
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12 | this.listener = function (e) { return out._n(e); };
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13 | this.node.addEventListener(this.eventType, this.listener, this.useCapture);
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14 | };
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15 | DOMEventProducer.prototype._stop = function () {
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16 | this.node.removeEventListener(this.eventType, this.listener, this.useCapture);
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17 | this.listener = null;
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18 | };
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19 | return DOMEventProducer;
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20 | }());
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21 | exports.DOMEventProducer = DOMEventProducer;
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22 | var NodeEventProducer = /** @class */ (function () {
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23 | function NodeEventProducer(node, eventName) {
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24 | this.node = node;
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25 | this.eventName = eventName;
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26 | this.type = 'fromEvent';
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27 | }
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28 | NodeEventProducer.prototype._start = function (out) {
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29 | this.listener = function () {
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30 | var args = [];
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31 | for (var _i = 0; _i < arguments.length; _i++) {
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32 | args[_i] = arguments[_i];
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33 | }
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34 | return (args.length > 1) ? out._n(args) : out._n(args[0]);
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35 | };
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36 | this.node.addListener(this.eventName, this.listener);
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37 | };
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38 | NodeEventProducer.prototype._stop = function () {
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39 | this.node.removeListener(this.eventName, this.listener);
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40 | this.listener = null;
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41 | };
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42 | return NodeEventProducer;
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43 | }());
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44 | exports.NodeEventProducer = NodeEventProducer;
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45 | function isEmitter(element) {
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46 | return element.emit && element.addListener;
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47 | }
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48 | /**
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49 | * Creates a stream based on either:
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50 | * - DOM events with the name `eventName` from a provided target node
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51 | * - Events with the name `eventName` from a provided NodeJS EventEmitter
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52 | *
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53 | * When creating a stream from EventEmitters, if the source event has more than
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54 | * one argument all the arguments will be aggregated into an array in the
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55 | * result stream.
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56 | *
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57 | * (Tip: when using this factory with TypeScript, you will need types for
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58 | * Node.js because fromEvent knows how to handle both DOM events and Node.js
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59 | * EventEmitter. Just install `@types/node`)
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60 | *
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61 | * Marble diagram:
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62 | *
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63 | * ```text
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64 | * fromEvent(element, eventName)
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65 | * ---ev--ev----ev---------------
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66 | * ```
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67 | *
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68 | * Examples:
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69 | *
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70 | * ```js
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71 | * import fromEvent from 'xstream/extra/fromEvent'
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72 | *
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73 | * const stream = fromEvent(document.querySelector('.button'), 'click')
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74 | * .mapTo('Button clicked!')
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75 | *
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76 | * stream.addListener({
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77 | * next: i => console.log(i),
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78 | * error: err => console.error(err),
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79 | * complete: () => console.log('completed')
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80 | * })
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81 | * ```
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82 | *
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83 | * ```text
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84 | * > 'Button clicked!'
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85 | * > 'Button clicked!'
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86 | * > 'Button clicked!'
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87 | * ```
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88 | *
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89 | * ```js
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90 | * import fromEvent from 'xstream/extra/fromEvent'
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91 | * import {EventEmitter} from 'events'
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92 | *
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93 | * const MyEmitter = new EventEmitter()
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94 | * const stream = fromEvent(MyEmitter, 'foo')
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95 | *
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96 | * stream.addListener({
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97 | * next: i => console.log(i),
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98 | * error: err => console.error(err),
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99 | * complete: () => console.log('completed')
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100 | * })
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101 | *
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102 | * MyEmitter.emit('foo', 'bar')
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103 | * ```
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104 | *
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105 | * ```text
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106 | * > 'bar'
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107 | * ```
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108 | *
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109 | * ```js
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110 | * import fromEvent from 'xstream/extra/fromEvent'
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111 | * import {EventEmitter} from 'events'
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112 | *
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113 | * const MyEmitter = new EventEmitter()
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114 | * const stream = fromEvent(MyEmitter, 'foo')
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115 | *
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116 | * stream.addListener({
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117 | * next: i => console.log(i),
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118 | * error: err => console.error(err),
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119 | * complete: () => console.log('completed')
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120 | * })
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121 | *
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122 | * MyEmitter.emit('foo', 'bar', 'baz', 'buzz')
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123 | * ```
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124 | *
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125 | * ```text
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126 | * > ['bar', 'baz', 'buzz']
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127 | * ```
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128 | *
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129 | * @factory true
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130 | * @param {EventTarget|EventEmitter} element The element upon which to listen.
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131 | * @param {string} eventName The name of the event for which to listen.
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132 | * @param {boolean?} useCapture An optional boolean that indicates that events of
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133 | * this type will be dispatched to the registered listener before being
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134 | * dispatched to any EventTarget beneath it in the DOM tree. Defaults to false.
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135 | * @return {Stream}
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136 | */
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137 | function fromEvent(element, eventName, useCapture) {
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138 | if (useCapture === void 0) { useCapture = false; }
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139 | if (isEmitter(element)) {
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140 | return new index_1.Stream(new NodeEventProducer(element, eventName));
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141 | }
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142 | else {
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143 | return new index_1.Stream(new DOMEventProducer(element, eventName, useCapture));
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144 | }
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145 | }
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146 | exports.default = fromEvent;
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Just install `@types/node`)\n *\n * Marble diagram:\n *\n * ```text\n *   fromEvent(element, eventName)\n * ---ev--ev----ev---------------\n * ```\n *\n * Examples:\n *\n * ```js\n * import fromEvent from 'xstream/extra/fromEvent'\n *\n * const stream = fromEvent(document.querySelector('.button'), 'click')\n *   .mapTo('Button clicked!')\n *\n * stream.addListener({\n *   next: i => console.log(i),\n *   error: err => console.error(err),\n *   complete: () => console.log('completed')\n * })\n * ```\n *\n * ```text\n * > 'Button clicked!'\n * > 'Button clicked!'\n * > 'Button clicked!'\n * ```\n *\n * ```js\n * import fromEvent from 'xstream/extra/fromEvent'\n * import {EventEmitter} from 'events'\n *\n * const MyEmitter = new EventEmitter()\n * const stream = fromEvent(MyEmitter, 'foo')\n *\n * stream.addListener({\n *   next: i => console.log(i),\n *   error: err => console.error(err),\n *   complete: () => console.log('completed')\n * })\n *\n * MyEmitter.emit('foo', 'bar')\n * ```\n *\n * ```text\n * > 'bar'\n * ```\n *\n * ```js\n * import fromEvent from 'xstream/extra/fromEvent'\n * import {EventEmitter} from 'events'\n *\n * const MyEmitter = new EventEmitter()\n * const stream = fromEvent(MyEmitter, 'foo')\n *\n * stream.addListener({\n *   next: i => console.log(i),\n *   error: err => console.error(err),\n *   complete: () => console.log('completed')\n * })\n *\n * MyEmitter.emit('foo', 'bar', 'baz', 'buzz')\n * ```\n *\n * ```text\n * > ['bar', 'baz', 'buzz']\n * ```\n *\n * @factory true\n * @param {EventTarget|EventEmitter} element The element upon which to listen.\n * @param {string} eventName The name of the event for which to listen.\n * @param {boolean?} useCapture An optional boolean that indicates that events of\n * this type will be dispatched to the registered listener before being\n * dispatched to any EventTarget beneath it in the DOM tree. Defaults to false.\n * @return {Stream}\n */\nfunction fromEvent<T = any>(element: EventEmitter | EventTarget,\n                            eventName: string,\n                            useCapture: boolean = false): Stream<T> {\n  if (isEmitter(element)) {\n    return new Stream<T>(new NodeEventProducer(element, eventName));\n  } else {\n    return new Stream<T>(new DOMEventProducer(element, eventName, useCapture) as any);\n  }\n}\n\nexport default fromEvent;\n"]} |
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