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jquery.fileapi.js
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/**
* jQuery plugin for FileAPI v2+
* @auhtor RubaXa <[email protected]>
*/
/*jslint evil: true */
/*global jQuery, FileAPI*/
(function ($, api){
"use strict";
var
noop = $.noop
, oldJQ = !$.fn.prop
, propFn = oldJQ ? 'attr' : 'prop'
, _dataAttr = 'data-fileapi'
, _dataFileId = 'data-fileapi-id'
, _slice = [].slice
, _each = api.each
, _extend = api.extend
, _bind = function (ctx, fn) {
var args = _slice.call(arguments, 2);
return fn.bind ? fn.bind.apply(fn, [ctx].concat(args)) : function (){
return fn.apply(ctx, args.concat(_slice.call(arguments)));
};
}
, _optDataAttr = function (name){
return '['+_dataAttr+'="'+name+'"]';
}
, _isID = function (selector){
return selector.indexOf('#') === 0;
}
;
var Plugin = function (el, options){
this.$el = el = $(el).on('change.fileapi', 'input[type="file"]', _bind(this, this._onSelect));
this.el = el[0];
this._options = {}; // previous options
this.options = { // current options
url: 0,
data: {}, // additional POST-data
accept: 0, // accept mime types, "*" — unlimited
multiple: false, // single or multiple mode upload mode
paramName: 0, // POST-parameter name
dataType: 'json',
duplicate: false, // ignore duplicate
chunkSize: 0, // or chunk size in bytes, eg: .5 * FileAPI.MB
chunkUploadRetry: 3, // number of retries during upload chunks (html5)
maxSize: 0, // max file size, 0 — unlimited
maxFiles: 0, // 0 unlimited
imageSize: 0, // { minWidth: 320, minHeight: 240, maxWidth: 3840, maxHeight: 2160 }
sortFn: 0,
filterFn: 0,
autoUpload: false,
clearOnSelect: void 0,
clearOnComplete: void 0,
lang: {
B: 'bytes'
, KB: 'KB'
, MB: 'MB'
, GB: 'GB'
, TB: 'TB'
},
sizeFormat: '0.00',
imageTransform: 0,
imageAutoOrientation: !!FileAPI.support.exif,
elements: {
ctrl: {
upload: _optDataAttr('ctrl.upload'),
reset: _optDataAttr('ctrl.reset'),
abort: _optDataAttr('ctrl.abort')
},
empty: {
show: _optDataAttr('empty.show'),
hide: _optDataAttr('empty.hide')
},
emptyQueue: {
show: _optDataAttr('emptyQueue.show'),
hide: _optDataAttr('emptyQueue.hide')
},
active: {
show: _optDataAttr('active.show'),
hide: _optDataAttr('active.hide')
},
size: _optDataAttr('size'),
name: _optDataAttr('name'),
progress: _optDataAttr('progress'),
list: _optDataAttr('list'),
file: {
tpl: _optDataAttr('file.tpl'),
progress: _optDataAttr('file.progress'),
active: {
show: _optDataAttr('file.active.show'),
hide: _optDataAttr('file.active.hide')
},
preview: {
el: 0,
get: 0,
width: 0,
height: 0,
processing: 0
},
abort: _optDataAttr('file.abort'),
remove: _optDataAttr('file.remove'),
rotate: _optDataAttr('file.rotate')
},
dnd: {
el: _optDataAttr('dnd'),
hover: 'dnd_hover',
fallback: _optDataAttr('dnd.fallback')
}
},
onDrop: noop,
onDropHover: noop,
onSelect: noop,
onUpload: noop,
onProgress: noop,
onComplete: noop,
onFilePrepare: noop,
onFileUpload: noop,
onFileProgress: noop,
onFileComplete: noop,
onFileRemove: null,
onFileRemoveCompleted: null
};
$.extend(true, this.options, options); // deep extend
options = this.options;
this.option('elements.file.preview.rotate', options.imageAutoOrientation);
if( !options.url ){
var url = this.$el.attr('action') || this.$el.find('form').attr('action');
if( url ){
options.url = url;
} else {
this._throw('url — is not defined');
}
}
this.$files = this.$elem('list');
this.itemTplFn = $.fn.fileapi.tpl( $('<div/>').append( this.$elem('file.tpl')).html() );
_each(options, function (value, option){
this._setOption(option, value);
}, this);
this.$el
.on('reset.fileapi', _bind(this, this._onReset))
.on('submit.fileapi', _bind(this, this._onSubmit))
.on('upload.fileapi progress.fileapi complete.fileapi', _bind(this, this._onUploadEvent))
.on('fileupload.fileapi fileprogress.fileapi filecomplete.fileapi', _bind(this, this._onFileUploadEvent))
.on('click', '['+_dataAttr+']', _bind(this, this._onActionClick))
;
// Controls
var ctrl = options.elements.ctrl;
if( ctrl ){
this._listen('click', ctrl.reset, _bind(this, this._onReset));
this._listen('click', ctrl.upload, _bind(this, this._onSubmit));
this._listen('click', ctrl.abort, _bind(this, this._onAbort));
}
// Drag'n'Drop
var dnd = FileAPI.support.dnd;
this.$elem('dnd.el', true).toggle(dnd);
this.$elem('dnd.fallback').toggle(!dnd);
if( dnd ){
this.$elem('dnd.el', true).dnd(_bind(this, this._onDropHover), _bind(this, this._onDrop));
}
this.$progress = this.$elem('progress');
if( options.clearOnSelect === void 0 ){
options.clearOnSelect = !options.multiple;
}
this.clear();
};
Plugin.prototype = {
constructor: Plugin,
_throw: function (msg){
throw "jquery.fileapi: " + msg;
},
_getFiles: function (evt, fn){
var
opts = this.options
, maxSize = opts.maxSize
, maxFiles = opts.maxFiles
, filterFn = opts.filterFn
, countFiles = this.files.length
, files = api.getFiles(evt)
, data = {
all: files
, files: []
, other: []
, duplicate: opts.duplicate ? [] : this._extractDuplicateFiles(files)
}
, imageSize = opts.imageSize
, _this = this
;
if( imageSize || filterFn ){
api.filterFiles(files, function (file, info){
if( info && imageSize ){
_checkFileByCriteria(file, 'minWidth', imageSize.minWidth, info.width);
_checkFileByCriteria(file, 'minHeight', imageSize.minHeight, info.height);
_checkFileByCriteria(file, 'maxWidth', imageSize.maxWidth, info.width);
_checkFileByCriteria(file, 'maxHeight', imageSize.maxHeight, info.height);
}
_checkFileByCriteria(file, 'maxSize', maxSize, file.size);
return !file.errors && (!filterFn || filterFn(file, info));
}, function (success, rejected){
_extractFilesOverLimit(maxFiles, countFiles, success, rejected);
data.other = rejected;
data.files = success;
fn.call(_this, data);
});
} else {
_each(files, function (file){
_checkFileByCriteria(file, 'maxSize', maxSize, file.size);
data[file.errors ? 'other' : 'files'].push(file);
});
_extractFilesOverLimit(maxFiles, countFiles, data.files, data.other);
fn.call(_this, data);
}
},
_extractDuplicateFiles: function (list/**Array*/){
var duplicates = [], i = list.length, files = this.files, j;
while( i-- ){
j = files.length;
while( j-- ){
if( this._fileCompare(list[i], files[j]) ){
duplicates.push( list.splice(i, 1) );
break;
}
}
}
return duplicates;
},
_fileCompare: function (A/**File*/, B/**File*/){
return (A.size == B.size) && (A.name == B.name);
},
_getFormatedSize: function (size){
var opts = this.options, postfix = 'B';
if( size >= api.TB ){
size /= api[postfix = 'TB'];
}
else if( size >= api.GB ){
size /= api[postfix = 'GB'];
}
else if( size >= api.MB ){
size /= api[postfix = 'MB'];
}
else if( size >= api.KB ){
size /= api[postfix = 'KB'];
}
return opts.sizeFormat.replace(/^\d+([^\d]+)(\d*)/, function (_, separator, fix){
size = size.toFixed(fix.length);
return (size + '').replace('.', separator) +' '+ opts.lang[postfix];
});
},
_onSelect: function (evt){
if( this.options.clearOnSelect ){
this.queue = [];
this.files = [];
}
this._getFiles(evt, _bind(this, function (data){
if( data.all.length && this.emit('select', data) !== false ){
this.add(data.files);
}
// Reset input
FileAPI.reset(evt.target);
}));
},
_onActionClick: function (evt){
var
el = evt.currentTarget
, act = $.attr(el, _dataAttr)
, uid = $(el).closest('['+_dataFileId+']', this.$el).attr(_dataFileId)
, file = this._getFile(uid)
, prevent = true
;
if( 'file.remove' == act ){
if( file && this.emit('fileRemove'+(file.complete ? 'Completed' : ''), file) ){
this.remove(uid);
}
}
else if( /^file\.rotate/.test(act) ){
this.rotate(uid, (/ccw/.test(act) ? '-=90' : '+=90'));
}
else {
prevent = false;
}
if( prevent ){
evt.preventDefault();
}
},
_listen: function (name, selector, fn){
selector && _each($.trim(selector).split(','), function (selector){
selector = $.trim(selector);
if( _isID(selector) ){
$(selector).on(name+'.fileapi', fn);
} else {
this.$el.on(name+'.fileapi', selector, fn);
}
}, this);
},
_onSubmit: function (evt){
evt.preventDefault();
this.upload();
},
_onReset: function (evt){
evt.preventDefault();
this.clear();
},
_onAbort: function (evt){
evt.preventDefault();
this.abort();
},
_onDrop: function (files){
this._getFiles(files, function (data){
if( this.emit('drop', data) !== false ){
this.add(data.files);
}
});
},
_onDropHover: function (state, evt){
if( this.emit('dropHover', { state: state, event: evt }) !== false ){
var hover = this.option('elements.dnd.hover');
if( hover ){
$(evt.currentTarget).toggleClass(hover, state);
}
}
},
_getFile: function (uid){
return api.filter(this.files, function (file){ return api.uid(file) == uid; })[0];
},
_getUploadEvent: function (extra){
var xhr = this.xhr, evt = {
xhr: xhr
, file: xhr.currentFile
, files: xhr.files
, widget: this
};
return _extend(evt, extra);
},
_emitUploadEvent: function (prefix){
var evt = this._getUploadEvent();
this.emit(prefix+'Upload', evt);
},
_emitProgressEvent: function (prefix, event){
var evt = this._getUploadEvent(event);
this.emit(prefix+'Progress', evt);
},
_emitCompleteEvent: function (prefix, err, xhr, file){
var evt = this._getUploadEvent({
error: err
, status: xhr.status
, statusText: xhr.statusText
, result: xhr.responseText
});
if( prefix == 'file' ){
file.complete = true;
}
if( !err && (this.options.dataType == 'json') ){
try {
evt.result = $.parseJSON(evt.result);
} catch (err){
evt.error = err;
}
}
this.emit(prefix+'Complete', evt);
},
_onUploadEvent: function (evt, ui){
var _this = this, $progress = _this.$progress, type = evt.type;
if( type == 'progress' ){
$progress.stop().animate({ width: ui.loaded/ui.total*100 + '%' }, 300);
}
else if( type == 'upload' ){
// Начало загрузки
$progress.width(0);
}
else {
// Завершение загрузки
var fn = function (){
$progress.dequeue();
_this[_this.options.clearOnComplete ? 'clear' : 'dequeue']();
};
this.xhr = null;
this.active = false;
if( $progress.length ){
$progress.queue(fn);
} else {
fn();
}
}
},
_onFileUploadPrepare: function (file, opts){
var
uid = api.uid(file)
, deg = this._rotate[uid]
, crop = this._crop[uid]
, resize = this._resize[uid]
, evt = this._getUploadEvent()
;
if( deg || crop ){
var trans = opts.imageTransform = opts.imageTransform || {};
deg = deg || (this.options.imageAutoOrientation ? 'auto' : void 0);
if( $.isEmptyObject(trans) || _isOriginTransform(trans) ){
_extend(trans, resize);
trans.crop = crop;
trans.rotate = deg;
}
else {
_each(trans, function (opts){
_extend(opts, resize);
opts.crop = crop;
opts.rotate = deg;
});
}
}
evt.file = file;
evt.options = opts;
this.emit('filePrepare', evt);
},
_onFileUploadEvent: function (evt, ui){
var
_this = this
, type = evt.type.substr(4)
, uid = api.uid(ui.file)
, $file = this.$file(uid)
, $progress = this._$fileprogress
, opts = this.options
;
if( this.__fileId !== uid ){
this.__fileId = uid;
this._$fileprogress = $progress = this.$elem('file.progress', $file);
}
if( type == 'progress' ){
$progress.stop().animate({ width: ui.loaded/ui.total*100 + '%' }, 300);
}
else if( type == 'upload' || type == 'complete' ){
var fn = function (){
var
elem = 'file.'+ type
, $remove = _this.$elem('file.remove', $file)
;
if( type == 'upload' ){
$remove.hide();
$progress.width(0);
} else if( opts.onRemoveCompleted ){
$remove.show();
}
$progress.dequeue();
_this.$elem(elem + '.show', $file).show();
_this.$elem(elem + '.hide', $file).hide();
};
if( $progress.length ){
$progress.queue(fn);
} else {
fn();
}
if( type == 'complete' ){
this.uploaded.push(ui.file);
delete this._rotate[uid];
}
}
},
_redraw: function (clear/**Boolean*/){
var
files = this.files
, active = !!this.active
, empty = !files.length && !active
, emptyQueue = !this.queue.length && !active
, name = []
, size = 0
, $files = this.$files
, offset = $files.children().length
, preview = this.option('elements.file.preview')
;
if( clear ){
this.$files.empty();
}
_each(files, function (file, i){
var uid = api.uid(file);
name.push(file.name);
size += file.size;
if( $files.length && !this.$file(uid).length ){
var html = this.itemTplFn({
$idx: offset + i
, uid: uid
, name: file.name
, type: file.type
, size: file.size
, sizeText: this._getFormatedSize(file.size)
});
$files.append( $(html).attr(_dataFileId, uid) );
if( preview.el ){
this._makeFilePreview(uid, file, preview);
}
}
}, this);
this.$elem('name').text( name.join(', ') );
this.$elem('size').text( size ? this._getFormatedSize(size) : '' );
this.$elem('empty.show').toggle( empty );
this.$elem('empty.hide').toggle( !empty );
this.$elem('emptyQueue.show').toggle( emptyQueue );
this.$elem('emptyQueue.hide').toggle( !emptyQueue );
this.$elem('active.show').toggle( active );
this.$elem('active.hide').toggle( !active );
this.$('.js-fileapi-wrapper,:file')
[active ? 'attr' : 'removeAttr']('aria-disabled', active)
[propFn]('disabled', active)
;
// Upload control
this._disableElem('ctrl.upload', emptyQueue || active);
// Reset control
this._disableElem('ctrl.reset', emptyQueue || active);
// Abort control
this._disableElem('ctrl.abort', !active);
},
_disableElem: function (name, state){
this.$elem(name)
[state ? 'attr' : 'removeAttr']('aria-disabled', 'disabled')
[propFn]('disabled', state)
;
},
_makeFilePreview: function (uid, file, opts, global){
var
_this = this
, $el = global ? _this.$(opts.el) : _this.$file(uid).find(opts.el)
;
if( !_this._crop[uid] ){
if( /^image/.test(file.type) ){
var
image = api.Image(file)
, doneFn = function (){
image.get(function (err, img){
if( !_this._crop[uid] ){
if( err ){
opts.get && opts.get($el, file);
_this.emit('previewError', [err, file]);
} else {
$el.html(img);
}
}
});
}
;
if( opts.width ){
image.preview(opts.width, opts.height);
}
if( opts.rotate ){
image.rotate('auto');
}
if( opts.processing ){
opts.processing(file, image, doneFn);
} else {
doneFn();
}
}
else {
opts.get && opts.get($el, file);
}
}
},
emit: function (name, arg){
var opts = this.options, evt = $.Event(name.toLowerCase()), res;
evt.widget = this;
name = $.camelCase('on-'+name);
if( $.isFunction(opts[name]) ){
res = opts[name].call(this.el, evt, arg);
}
this.$el.triggerHandler(evt, arg);
return (res !== false) && !evt.isDefaultPrevented();
},
/**
* Add files to queue
* @param {Array} files
* @param {Boolean} [clear]
*/
add: function (files, clear){
files = [].concat(files);
if( files.length ){
var
opts = this.options
, sortFn = opts.sortFn
, preview = opts.elements.preview
;
if( sortFn ){
files.sort(sortFn);
}
if( preview && preview.el ){
_each(files, function (file){
this._makeFilePreview(api.uid(file), file, preview, true);
}, this);
}
if( this.xhr ){
this.xhr.append(files);
}
this.queue = clear ? files : this.queue.concat(files);
this.files = clear ? files : this.files.concat(files);
if( this.active ){
this.xhr.append(files);
this._redraw(clear);
}
else {
this._redraw(clear);
if( this.options.autoUpload ){
this.upload();
}
}
}
},
/**
* Find element
* @param {String} sel
* @param {jQuery} [ctx]
* @return {jQuery}
*/
$: function (sel, ctx){
if( typeof sel === 'string' ){
sel = /^#/.test(sel) ? sel : (ctx ? $(ctx) : this.$el).find(sel);
}
return $(sel);
},
/**
* @param {String} name
* @param {Boolean|jQuery} [up]
* @param {jQuery} [ctx]
* @return {jQuery}
*/
$elem: function (name, up, ctx){
if( up && up.jquery ){
ctx = up;
up = false;
}
var sel = this.option('elements.'+name);
if( sel === void 0 && up ){
sel = this.option('elements.'+name.substr(0, name.lastIndexOf('.')));
}
return this.$($.type(sel) != 'string' && $.isEmptyObject(sel) ? [] : sel, ctx);
},
/**
* @param {String} uid
* @return {jQuery}
*/
$file: function (uid){
return this.$('['+_dataFileId+'="'+uid+'"]');
},
/**
* Get/set options
* @param {String} name
* @param {*} [value]
* @return {*}
*/
option: function (name, value){
if( value !== void 0 && $.isPlainObject(value) ){
_each(value, function (val, key){
this.option(name+'.'+key, val);
}, this);
return this;
}
var opts = this.options, val = opts[name], i = 0, len, part;
if( name.indexOf('.') != -1 ){
val = opts;
name = name.split('.');
len = name.length;
for( ; i < len; i++ ){
part = name[i];
if( (value !== void 0) && (len - i === 1) ){
val[part] = value;
break;
}
else if( !val[part] ){
val[part] = {};
}
val = val[part];
}
}
else if( value !== void 0 ){
opts[name] = value;
}
if( value !== void 0 ){
this._setOption(name, value, this._options[name]);
this._options[name] = value;
}
return value !== void 0 ? value : val;
},
_setOption: function (name, nVal){
switch( name ){
case 'accept':
case 'multiple':
case 'paramName':
if( name == 'paramName' ){ name = 'name'; }
if( nVal ){
this.$(':file')[propFn](name, nVal);
}
break;
}
},
serialize: function (){
var obj = {}, val;
this.$el.find(':input').each(function(name, node){
if(
(name = node.name) && !node.disabled
&& (node.checked || /select|textarea|input/i.test(node.nodeName) && !/checkbox|radio|file/i.test(node.type))
){
val = $(node).val();
if( obj[name] !== void 0 ){
if( !obj[name].push ){
obj[name] = [obj[name]];
}
obj[name].push(val);
} else {
obj[name] = val;
}
}
});
return obj;
},
upload: function (){
if( !this.active ){
this.active = true;
var
$el = this.$el
, opts = this.options
, files = {}
, uploadOpts = {
url: opts.url
, data: _extend({}, this.serialize(), opts.data)
, headers: opts.headers
, files: files
, chunkSize: opts.chunkSize|0
, chunkUploadRetry: opts.chunkUploadRetry|0
, prepare: _bind(this, this._onFileUploadPrepare)
, imageTransform: opts.imageTransform
}
;
// Set files
files[$el.find(':file').attr('name') || 'files[]'] = this.queue;
// Add event listeners
_each(['Upload', 'Progress', 'Complete'], function (name){
var lowerName = name.toLowerCase();
uploadOpts[lowerName] = _bind(this, this['_emit'+name+'Event'], '');
uploadOpts['file'+lowerName] = _bind(this, this['_emit'+name+'Event'], 'file');
}, this);
// Start uploading
this.xhr = api.upload(uploadOpts);
this._redraw();
}
},
abort: function (text){
if( this.active && this.xhr ){
this.xhr.abort(text);
}
},
crop: function (file, coords){
var
uid = api.uid(file)
, opts = this.options
, preview = opts.multiple ? this.option('elements.file.preview') : opts.elements.preview
, $el = (opts.multiple ? this.$file(uid) : this.$el).find(preview && preview.el)
;
if( $el.length ){
api.getInfo(file, _bind(this, function (err, info){
if( err ){
this.emit('previewError', [err, file]);
} else {
if( !$el.find('div>div').length ){
$el.html(
$('<div><div></div></div>')
.css(preview)
.css('overflow', 'hidden')
);
}
if( this.__cropFile !== file ){
this.__cropFile = file;
api.Image(file).rotate(opts.imageAutoOrientation ? 'auto' : 0).get(function (err, img){
$el.find('>div>div').html($(img).width('100%').height('100%'));
}, 'exactFit');
}
var
pw = preview.width, ph = preview.height
, mx = pw, my = ph
, rx = pw/coords.rw, ry = ph/coords.rh
;
if( preview.keepAspectRatio ){
if (rx > 1 && ry > 1){ // image is smaller than preview (no scale)
rx = ry = 1;
my = coords.h;
mx = coords.w;
} else { // image is bigger than preview (scale)
if( rx < ry ){
ry = rx;
my = pw * coords.rh / coords.rw;
} else {
rx = ry;
mx = ph * coords.rw / coords.rh;
}
}
}
$el.find('>div>div').css({
width: Math.round(rx * info[coords.flip ? 'height' : 'width'])
, height: Math.round(ry * info[coords.flip ? 'width' : 'height'])
, marginLeft: -Math.round(rx * coords.rx)
, marginTop: -Math.round(ry * coords.ry)
});
if( preview.keepAspectRatio ){ // create side gaps
$el.find('>div').css({
width: Math.round(mx)
, height: Math.round(my)
, marginLeft: mx < pw ? Math.round((pw - mx) / 2) : 0
, marginTop: my < ph ? Math.round((ph - my) / 2) : 0
});
}
}
}));
}
this._crop[uid] = coords;
},
resize: function (file, width, height, type){
this._resize[api.uid(file)] = {
type: type
, width: width
, height: height
};
},
rotate: function (file, deg){
var
uid = typeof file == 'object' ? api.uid(file) : file
, opts = this.options
, preview = opts.multiple ? this.option('elements.file.preview') : opts.elements.preview
, $el = (opts.multiple ? this.$file(uid) : this.$el).find(preview && preview.el)
, _rotate = this._rotate
;
if( /([+-])=/.test(deg) ){
deg = _rotate[uid] = (_rotate[uid] || 0) + (RegExp.$1 == '+' ? 1 : -1) * deg.substr(2);
} else {
_rotate[uid] = deg;
}
$el.css({
'-webkit-transform': 'rotate('+deg+'deg)'
, '-moz-transform': 'rotate('+deg+'deg)'
, 'transform': 'rotate('+deg+'deg)'
});