| 1 | 'use strict';
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| 2 |
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| 3 | var chain = require('es5-ext/lib/Function/prototype/chain')
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| 4 | , write = process.stdout.write.bind(process.stdout)
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| 5 |
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| 6 | , chars = '-\\|/'
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| 7 | , l = chars.length
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| 8 | , p;
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| 9 |
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| 10 | p = {
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| 11 | next: 0,
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| 12 | write: write,
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| 13 | throbbed: false,
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| 14 | ontick: function () {
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| 15 | if (this.throbbed) {
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| 16 | write('\u0008');
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| 17 | } else {
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| 18 | this.throbbed = true;
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| 19 | }
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| 20 | this.write(chars[this.next++ % l]);
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| 21 | },
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| 22 | onstop: function () {
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| 23 | if (this.throbbed) {
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| 24 | write('\u0008');
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| 25 | this.next = 0;
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| 26 | this.throbbed = false;
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| 27 | }
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| 28 | }
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| 29 | };
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| 30 |
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| 31 | module.exports = function (interval, formatting) {
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| 32 | var o = Object.create(p);
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| 33 | if (formatting) {
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| 34 | o.write = chain.call(formatting, write);
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| 35 | }
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| 36 | interval.on('tick', o.ontick.bind(o));
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| 37 | interval.on('stop', o.onstop.bind(o));
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| 38 | };
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