mirror of
https://github.com/musix-org/musix-oss
synced 2024-11-14 03:30:18 +00:00
37 lines
963 B
JavaScript
37 lines
963 B
JavaScript
|
'use strict'
|
||
|
|
var util = require('util')
|
||
|
|
var stream = require('readable-stream')
|
||
|
|
var delegate = require('delegates')
|
||
|
|
var Tracker = require('./tracker.js')
|
||
|
|
|
||
|
|
var TrackerStream = module.exports = function (name, size, options) {
|
||
|
|
stream.Transform.call(this, options)
|
||
|
|
this.tracker = new Tracker(name, size)
|
||
|
|
this.name = name
|
||
|
|
this.id = this.tracker.id
|
||
|
|
this.tracker.on('change', delegateChange(this))
|
||
|
|
}
|
||
|
|
util.inherits(TrackerStream, stream.Transform)
|
||
|
|
|
||
|
|
function delegateChange (trackerStream) {
|
||
|
|
return function (name, completion, tracker) {
|
||
|
|
trackerStream.emit('change', name, completion, trackerStream)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
TrackerStream.prototype._transform = function (data, encoding, cb) {
|
||
|
|
this.tracker.completeWork(data.length ? data.length : 1)
|
||
|
|
this.push(data)
|
||
|
|
cb()
|
||
|
|
}
|
||
|
|
|
||
|
|
TrackerStream.prototype._flush = function (cb) {
|
||
|
|
this.tracker.finish()
|
||
|
|
cb()
|
||
|
|
}
|
||
|
|
|
||
|
|
delegate(TrackerStream.prototype, 'tracker')
|
||
|
|
.method('completed')
|
||
|
|
.method('addWork')
|
||
|
|
.method('finish')
|