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;(function () {
/* Lightweight EventEmitter implementation */
EventEmitter = function () {}
EventEmitter.prototype.on = function (evt, fn) {
this._events = this._events || {}
this._events[evt] = this._events[evt] || []
this._events[evt].push(fn)
}
EventEmitter.prototype.off = function (evt, fn) {
if (!this.hasOwnProperty('_events')) return
if (evt in this._events === false) return
this._events[evt].splice(this._events[evt].indexOf(fn), 1)
}
EventEmitter.prototype.emit = function (evt) {
if (!this.hasOwnProperty('_events')) return
if (evt in this._events === false) return
for (var i = 0, l = this._events[evt].length; i < l; i++) {
this._events[evt][i].apply(this, Array.prototype.slice.call(arguments, 1))
}
}
/* Copy the stuff from Array to FileList */
FileList.prototype.forEach = Array.prototype.forEach
FileList.prototype.every = Array.prototype.every
FileList.prototype.some = Array.prototype.some
FileList.prototype.filter = Array.prototype.filter
FileList.prototype.map = Array.prototype.map
FileList.prototype.reduce = Array.prototype.reduce
FileList.prototype.reduceRight = Array.prototype.reduceRight
Object.defineProperty(FileList.prototype, "size", {
get: function getSize () {
return this.reduce(function (prev, curr) {
return prev + curr.size
}, 0)
}
})
/* Utility to convert bytes into human units */
var humanSize = {
get: function humanSize () {
var units = ["B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"]
var e = Math.floor(Math.log(this.size) / Math.log(1024))
return (this.size / Math.pow(1024, e)).toFixed(2) + " " + units[e]
}
}
Object.defineProperty(FileList.prototype, "humanSize", humanSize)
Object.defineProperty(File.prototype, "humanSize", humanSize)
var percentUploaded = {
get: function percentUploaded () {
return this.uploadedSize / this.size
}
}
Object.defineProperty(FileList.prototype, "percentUploaded", percentUploaded)
Object.defineProperty(File.prototype, "percentUploaded", percentUploaded)
Object.defineProperty(FileList.prototype, "uploadedSize", {
get: function getUploadedSize () {
return this.reduce(function (prev, curr) {
return prev + (curr.uploadedSize || 0)
}, 0)
}
})
/* Object URL stuff */
Object.defineProperty(File.prototype, "url", {
get: function getURL () {
return window.URL.createObjectURL(this);
}
})
File.revokeURL = function revokeURL (url) {
window.URL.revokeObjectURL(url)
}
// We manipulate this instead of files, because the fucking geniuses at
// Mozilla interpreted the spec to mean that HTMLInputElement.prototype.files
// is read-only. It isn't, read for yourself:
// http://www.w3.org/html/wg/drafts/html/master/forms.html#dom-input-files
//HTMLInputElement.prototype.filelist = Object.create(FileList);
/*
Object.defineProperty(HTMLInputElement.prototype, "filelist", {
get: function getFileList () {
return this.filelist = this._filelist || this.files
},
set: function (files) {
r
}
})*/
/* HTMLInputElement.prototype.addEventListener("change", function (e) {
this.filelist = e.target.files
})*/
// b gets merged as defaults for a
var defaults = function (a, b) {
var out = {}
for (var key in b) {
out[key] = (a[key] === void 0) ? b[key] : a[key]
}
return out
}
var FileListUploader = function (url, files, opts) {
this.url = url
this.files = files
opts = opts || {}
this.opts = defaults(opts, {
'field': 'files[]',
'method': 'POST'
})
}
FileListUploader.prototype = Object.create(EventEmitter.prototype)
FileListUploader.prototype.upload = function (cb) {
if (cb) this.on('uploadcomplete', cb)
var opts = this.opts
var files = this.files
var events = this
var data = new FormData()
files.forEach(function (file) {
data.append(opts.field, file)
})
var xhr = new XMLHttpRequest()
xhr.open(opts.method, this.url, true)
xhr.upload.addEventListener('loadstart', function (e) {
for (var i = 0, l = files.length; i < l; i++) {
files[i].uploadedSize = 0
}
})
xhr.upload.addEventListener('progress', function (e) {
if (e.lengthComputable) {
size = e.loaded
// We know the size of the files, the order they're in, and how
// much we've uploaded. Based on this data, we can do some magic
// to figure out which file we're on, and how much we've uploaded
// of that file.
// TODO: This math has trouble on later uploads. Leak somewhere
for (var i = 0, l = files.length; i < l; i++) {
files[i].uploadedSize = Math.min(size, files[i].size)
size -= files[i].uploadedSize
if (size <= 0) {
files.current = files[i]
size = 0
}
}
}
events.emit('uploadprogress', e, files)
}, false)
xhr.upload.addEventListener('loadstart', function (e) { events.emit('uploadstart', e) })
xhr.upload.addEventListener('load', function (e) { events.emit('uploadcomplete', e) })
xhr.addEventListener('progress', function (e) { events.emit('progress', e) })
xhr.addEventListener('load', function (e) { events.emit('load', e, xhr.responseText) })
xhr.send(data)
/* TODO: Add more event passthroughs, maybe abstract it into a helper? */
}
FileList.prototype.upload = function uploadFileList (url, opts) {
return new FileListUploader(url, this, opts)
}
})()
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