51 lines
1.3 KiB
JavaScript
51 lines
1.3 KiB
JavaScript
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'use strict';
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var compose = require('es5-ext/function/#/compose')
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, callable = require('es5-ext/object/valid-callable')
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, d = require('d')
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, validTimeout = require('timers-ext/valid-timeout')
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, chars = '-\\|/', l = chars.length, ThrobberIterator;
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ThrobberIterator = function () {};
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Object.defineProperties(ThrobberIterator.prototype, {
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index: d(-1),
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running: d(false),
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next: d(function () {
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var str = this.running ? '\u0008' : '';
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if (!this.running) this.running = true;
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return str + chars[this.index = ((this.index + 1) % l)];
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}),
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reset: d(function () {
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if (!this.running) return '';
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this.index = -1;
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this.running = false;
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return '\u0008';
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})
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});
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module.exports = exports = function (write, interval/*, format*/) {
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var format = arguments[2], token, iterator = new ThrobberIterator();
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callable(write);
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interval = validTimeout(interval);
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if (format !== undefined) write = compose.call(write, callable(format));
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return {
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start: function () {
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if (token) return;
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token = setInterval(function () { write(iterator.next()); }, interval);
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},
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restart: function () {
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this.stop();
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this.start();
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},
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stop: function () {
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if (!token) return;
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clearInterval(token);
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token = null;
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write(iterator.reset());
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}
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};
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};
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Object.defineProperty(exports, 'Iterator', d(ThrobberIterator));
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