88 lines
1.7 KiB
JavaScript
88 lines
1.7 KiB
JavaScript
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#!/usr/bin/env node
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var assert = require('assert')
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, ansi = require('../../')
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function Progress (stream, width) {
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this.cursor = ansi(stream)
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this.delta = this.cursor.newlines
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this.width = width | 0 || 10
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this.open = '['
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this.close = ']'
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this.complete = '█'
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this.incomplete = '_'
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// initial render
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this.progress = 0
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}
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Object.defineProperty(Progress.prototype, 'progress', {
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get: get
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, set: set
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, configurable: true
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, enumerable: true
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})
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function get () {
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return this._progress
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}
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function set (v) {
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this._progress = Math.max(0, Math.min(v, 100))
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var w = this.width - this.complete.length - this.incomplete.length
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, n = w * (this._progress / 100) | 0
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, i = w - n
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, com = c(this.complete, n)
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, inc = c(this.incomplete, i)
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, delta = this.cursor.newlines - this.delta
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assert.equal(com.length + inc.length, w)
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if (delta > 0) {
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this.cursor.up(delta)
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this.delta = this.cursor.newlines
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}
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this.cursor
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.horizontalAbsolute(0)
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.eraseLine(2)
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.fg.white()
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.write(this.open)
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.fg.grey()
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.bold()
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.write(com)
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.resetBold()
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.write(inc)
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.fg.white()
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.write(this.close)
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.fg.reset()
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.write('\n')
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}
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function c (char, length) {
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return Array.apply(null, Array(length)).map(function () {
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return char
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}).join('')
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}
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// Usage
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var width = parseInt(process.argv[2], 10) || process.stdout.getWindowSize()[0] / 2
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, p = new Progress(process.stdout, width)
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;(function tick () {
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p.progress += Math.random() * 5
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p.cursor
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.eraseLine(2)
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.write('Progress: ')
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.bold().write(p.progress.toFixed(2))
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.write('%')
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.resetBold()
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.write('\n')
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if (p.progress < 100)
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setTimeout(tick, 100)
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})()
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