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Member "Atom/resources/app/apm/node_modules/are-we-there-yet/tracker-group.js" (8 Mar 2017, 3231 Bytes) of archive /windows/misc/atom-windows.zip:


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    1 'use strict'
    2 var util = require('util')
    3 var TrackerBase = require('./tracker-base.js')
    4 var Tracker = require('./tracker.js')
    5 var TrackerStream = require('./tracker-stream.js')
    6 
    7 var TrackerGroup = module.exports = function (name) {
    8   TrackerBase.call(this, name)
    9   this.parentGroup = null
   10   this.trackers = []
   11   this.completion = {}
   12   this.weight = {}
   13   this.totalWeight = 0
   14   this.finished = false
   15   this.bubbleChange = bubbleChange(this)
   16 }
   17 util.inherits(TrackerGroup, TrackerBase)
   18 
   19 function bubbleChange (trackerGroup) {
   20   return function (name, completed, tracker) {
   21     trackerGroup.completion[tracker.id] = completed
   22     if (trackerGroup.finished) return
   23     trackerGroup.emit('change', name || trackerGroup.name, trackerGroup.completed(), trackerGroup)
   24   }
   25 }
   26 
   27 TrackerGroup.prototype.nameInTree = function () {
   28   var names = []
   29   var from = this
   30   while (from) {
   31     names.unshift(from.name)
   32     from = from.parentGroup
   33   }
   34   return names.join('/')
   35 }
   36 
   37 TrackerGroup.prototype.addUnit = function (unit, weight) {
   38   if (unit.addUnit) {
   39     var toTest = this
   40     while (toTest) {
   41       if (unit === toTest) {
   42         throw new Error(
   43           'Attempted to add tracker group ' +
   44           unit.name + ' to tree that already includes it ' +
   45           this.nameInTree(this))
   46       }
   47       toTest = toTest.parentGroup
   48     }
   49     unit.parentGroup = this
   50   }
   51   this.weight[unit.id] = weight || 1
   52   this.totalWeight += this.weight[unit.id]
   53   this.trackers.push(unit)
   54   this.completion[unit.id] = unit.completed()
   55   unit.on('change', this.bubbleChange)
   56   if (!this.finished) this.emit('change', unit.name, this.completion[unit.id], unit)
   57   return unit
   58 }
   59 
   60 TrackerGroup.prototype.completed = function () {
   61   if (this.trackers.length === 0) return 0
   62   var valPerWeight = 1 / this.totalWeight
   63   var completed = 0
   64   for (var ii = 0; ii < this.trackers.length; ii++) {
   65     var trackerId = this.trackers[ii].id
   66     completed += valPerWeight * this.weight[trackerId] * this.completion[trackerId]
   67   }
   68   return completed
   69 }
   70 
   71 TrackerGroup.prototype.newGroup = function (name, weight) {
   72   return this.addUnit(new TrackerGroup(name), weight)
   73 }
   74 
   75 TrackerGroup.prototype.newItem = function (name, todo, weight) {
   76   return this.addUnit(new Tracker(name, todo), weight)
   77 }
   78 
   79 TrackerGroup.prototype.newStream = function (name, todo, weight) {
   80   return this.addUnit(new TrackerStream(name, todo), weight)
   81 }
   82 
   83 TrackerGroup.prototype.finish = function () {
   84   this.finished = true
   85   if (!this.trackers.length) this.addUnit(new Tracker(), 1, true)
   86   for (var ii = 0; ii < this.trackers.length; ii++) {
   87     var tracker = this.trackers[ii]
   88     tracker.finish()
   89     tracker.removeListener('change', this.bubbleChange)
   90   }
   91   this.emit('change', this.name, 1, this)
   92 }
   93 
   94 var buffer = '                                  '
   95 TrackerGroup.prototype.debug = function (depth) {
   96   depth = depth || 0
   97   var indent = depth ? buffer.substr(0, depth) : ''
   98   var output = indent + (this.name || 'top') + ': ' + this.completed() + '\n'
   99   this.trackers.forEach(function (tracker) {
  100     if (tracker instanceof TrackerGroup) {
  101       output += tracker.debug(depth + 1)
  102     } else {
  103       output += indent + ' ' + tracker.name + ': ' + tracker.completed() + '\n'
  104     }
  105   })
  106   return output
  107 }