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