www.gusucode.com > wordpress PHP博客系统英文版 v4.5.1PHP源码程序 > wordpress PHP博客系统英文版 v4.5.1/wordpress/wordpress/wp-includes/js/plupload/wp-plupload.js
/* global pluploadL10n, plupload, _wpPluploadSettings */
window.wp = window.wp || {};
( function( exports, $ ) {
var Uploader;
if ( typeof _wpPluploadSettings === 'undefined' ) {
return;
}
/**
* A WordPress uploader.
*
* The Plupload library provides cross-browser uploader UI integration.
* This object bridges the Plupload API to integrate uploads into the
* WordPress back end and the WordPress media experience.
*
* @param {object} options The options passed to the new plupload instance.
* @param {object} options.container The id of uploader container.
* @param {object} options.browser The id of button to trigger the file select.
* @param {object} options.dropzone The id of file drop target.
* @param {object} options.plupload An object of parameters to pass to the plupload instance.
* @param {object} options.params An object of parameters to pass to $_POST when uploading the file.
* Extends this.plupload.multipart_params under the hood.
*/
Uploader = function( options ) {
var self = this,
isIE = navigator.userAgent.indexOf('Trident/') != -1 || navigator.userAgent.indexOf('MSIE ') != -1,
elements = {
container: 'container',
browser: 'browse_button',
dropzone: 'drop_element'
},
key, error;
this.supports = {
upload: Uploader.browser.supported
};
this.supported = this.supports.upload;
if ( ! this.supported ) {
return;
}
// Arguments to send to pluplad.Uploader().
// Use deep extend to ensure that multipart_params and other objects are cloned.
this.plupload = $.extend( true, { multipart_params: {} }, Uploader.defaults );
this.container = document.body; // Set default container.
// Extend the instance with options.
//
// Use deep extend to allow options.plupload to override individual
// default plupload keys.
$.extend( true, this, options );
// Proxy all methods so this always refers to the current instance.
for ( key in this ) {
if ( $.isFunction( this[ key ] ) ) {
this[ key ] = $.proxy( this[ key ], this );
}
}
// Ensure all elements are jQuery elements and have id attributes,
// then set the proper plupload arguments to the ids.
for ( key in elements ) {
if ( ! this[ key ] ) {
continue;
}
this[ key ] = $( this[ key ] ).first();
if ( ! this[ key ].length ) {
delete this[ key ];
continue;
}
if ( ! this[ key ].prop('id') ) {
this[ key ].prop( 'id', '__wp-uploader-id-' + Uploader.uuid++ );
}
this.plupload[ elements[ key ] ] = this[ key ].prop('id');
}
// If the uploader has neither a browse button nor a dropzone, bail.
if ( ! ( this.browser && this.browser.length ) && ! ( this.dropzone && this.dropzone.length ) ) {
return;
}
// Make sure flash sends cookies (seems in IE it does without switching to urlstream mode)
if ( ! isIE && 'flash' === plupload.predictRuntime( this.plupload ) &&
( ! this.plupload.required_features || ! this.plupload.required_features.hasOwnProperty( 'send_binary_string' ) ) ) {
this.plupload.required_features = this.plupload.required_features || {};
this.plupload.required_features.send_binary_string = true;
}
// Initialize the plupload instance.
this.uploader = new plupload.Uploader( this.plupload );
delete this.plupload;
// Set default params and remove this.params alias.
this.param( this.params || {} );
delete this.params;
/**
* Custom error callback.
*
* Add a new error to the errors collection, so other modules can track
* and display errors. @see wp.Uploader.errors.
*
* @param {string} message
* @param {object} data
* @param {plupload.File} file File that was uploaded.
*/
error = function( message, data, file ) {
if ( file.attachment ) {
file.attachment.destroy();
}
Uploader.errors.unshift({
message: message || pluploadL10n.default_error,
data: data,
file: file
});
self.error( message, data, file );
};
/**
* After the Uploader has been initialized, initialize some behaviors for the dropzone.
*
* @param {plupload.Uploader} uploader Uploader instance.
*/
this.uploader.bind( 'init', function( uploader ) {
var timer, active, dragdrop,
dropzone = self.dropzone;
dragdrop = self.supports.dragdrop = uploader.features.dragdrop && ! Uploader.browser.mobile;
// Generate drag/drop helper classes.
if ( ! dropzone ) {
return;
}
dropzone.toggleClass( 'supports-drag-drop', !! dragdrop );
if ( ! dragdrop ) {
return dropzone.unbind('.wp-uploader');
}
// 'dragenter' doesn't fire correctly, simulate it with a limited 'dragover'.
dropzone.bind( 'dragover.wp-uploader', function() {
if ( timer ) {
clearTimeout( timer );
}
if ( active ) {
return;
}
dropzone.trigger('dropzone:enter').addClass('drag-over');
active = true;
});
dropzone.bind('dragleave.wp-uploader, drop.wp-uploader', function() {
// Using an instant timer prevents the drag-over class from
// being quickly removed and re-added when elements inside the
// dropzone are repositioned.
//
// @see https://core.trac.wordpress.org/ticket/21705
timer = setTimeout( function() {
active = false;
dropzone.trigger('dropzone:leave').removeClass('drag-over');
}, 0 );
});
self.ready = true;
$(self).trigger( 'uploader:ready' );
});
this.uploader.init();
if ( this.browser ) {
this.browser.on( 'mouseenter', this.refresh );
} else {
this.uploader.disableBrowse( true );
// If HTML5 mode, hide the auto-created file container.
$('#' + this.uploader.id + '_html5_container').hide();
}
/**
* After files were filtered and added to the queue, create a model for each.
*
* @event FilesAdded
* @param {plupload.Uploader} uploader Uploader instance.
* @param {Array} files Array of file objects that were added to queue by the user.
*/
this.uploader.bind( 'FilesAdded', function( up, files ) {
_.each( files, function( file ) {
var attributes, image;
// Ignore failed uploads.
if ( plupload.FAILED === file.status ) {
return;
}
// Generate attributes for a new `Attachment` model.
attributes = _.extend({
file: file,
uploading: true,
date: new Date(),
filename: file.name,
menuOrder: 0,
uploadedTo: wp.media.model.settings.post.id
}, _.pick( file, 'loaded', 'size', 'percent' ) );
// Handle early mime type scanning for images.
image = /(?:jpe?g|png|gif)$/i.exec( file.name );
// For images set the model's type and subtype attributes.
if ( image ) {
attributes.type = 'image';
// `jpeg`, `png` and `gif` are valid subtypes.
// `jpg` is not, so map it to `jpeg`.
attributes.subtype = ( 'jpg' === image[0] ) ? 'jpeg' : image[0];
}
// Create a model for the attachment, and add it to the Upload queue collection
// so listeners to the upload queue can track and display upload progress.
file.attachment = wp.media.model.Attachment.create( attributes );
Uploader.queue.add( file.attachment );
self.added( file.attachment );
});
up.refresh();
up.start();
});
this.uploader.bind( 'UploadProgress', function( up, file ) {
file.attachment.set( _.pick( file, 'loaded', 'percent' ) );
self.progress( file.attachment );
});
/**
* After a file is successfully uploaded, update its model.
*
* @param {plupload.Uploader} uploader Uploader instance.
* @param {plupload.File} file File that was uploaded.
* @param {Object} response Object with response properties.
* @return {mixed}
*/
this.uploader.bind( 'FileUploaded', function( up, file, response ) {
var complete;
try {
response = JSON.parse( response.response );
} catch ( e ) {
return error( pluploadL10n.default_error, e, file );
}
if ( ! _.isObject( response ) || _.isUndefined( response.success ) )
return error( pluploadL10n.default_error, null, file );
else if ( ! response.success )
return error( response.data && response.data.message, response.data, file );
_.each(['file','loaded','size','percent'], function( key ) {
file.attachment.unset( key );
});
file.attachment.set( _.extend( response.data, { uploading: false }) );
wp.media.model.Attachment.get( response.data.id, file.attachment );
complete = Uploader.queue.all( function( attachment ) {
return ! attachment.get('uploading');
});
if ( complete )
Uploader.queue.reset();
self.success( file.attachment );
});
/**
* When plupload surfaces an error, send it to the error handler.
*
* @param {plupload.Uploader} uploader Uploader instance.
* @param {Object} error Contains code, message and sometimes file and other details.
*/
this.uploader.bind( 'Error', function( up, pluploadError ) {
var message = pluploadL10n.default_error,
key;
// Check for plupload errors.
for ( key in Uploader.errorMap ) {
if ( pluploadError.code === plupload[ key ] ) {
message = Uploader.errorMap[ key ];
if ( _.isFunction( message ) ) {
message = message( pluploadError.file, pluploadError );
}
break;
}
}
error( message, pluploadError, pluploadError.file );
up.refresh();
});
this.uploader.bind( 'PostInit', function() {
self.init();
});
};
// Adds the 'defaults' and 'browser' properties.
$.extend( Uploader, _wpPluploadSettings );
Uploader.uuid = 0;
// Map Plupload error codes to user friendly error messages.
Uploader.errorMap = {
'FAILED': pluploadL10n.upload_failed,
'FILE_EXTENSION_ERROR': pluploadL10n.invalid_filetype,
'IMAGE_FORMAT_ERROR': pluploadL10n.not_an_image,
'IMAGE_MEMORY_ERROR': pluploadL10n.image_memory_exceeded,
'IMAGE_DIMENSIONS_ERROR': pluploadL10n.image_dimensions_exceeded,
'GENERIC_ERROR': pluploadL10n.upload_failed,
'IO_ERROR': pluploadL10n.io_error,
'HTTP_ERROR': pluploadL10n.http_error,
'SECURITY_ERROR': pluploadL10n.security_error,
'FILE_SIZE_ERROR': function( file ) {
return pluploadL10n.file_exceeds_size_limit.replace('%s', file.name);
}
};
$.extend( Uploader.prototype, {
/**
* Acts as a shortcut to extending the uploader's multipart_params object.
*
* param( key )
* Returns the value of the key.
*
* param( key, value )
* Sets the value of a key.
*
* param( map )
* Sets values for a map of data.
*/
param: function( key, value ) {
if ( arguments.length === 1 && typeof key === 'string' ) {
return this.uploader.settings.multipart_params[ key ];
}
if ( arguments.length > 1 ) {
this.uploader.settings.multipart_params[ key ] = value;
} else {
$.extend( this.uploader.settings.multipart_params, key );
}
},
/**
* Make a few internal event callbacks available on the wp.Uploader object
* to change the Uploader internals if absolutely necessary.
*/
init: function() {},
error: function() {},
success: function() {},
added: function() {},
progress: function() {},
complete: function() {},
refresh: function() {
var node, attached, container, id;
if ( this.browser ) {
node = this.browser[0];
// Check if the browser node is in the DOM.
while ( node ) {
if ( node === document.body ) {
attached = true;
break;
}
node = node.parentNode;
}
// If the browser node is not attached to the DOM, use a
// temporary container to house it, as the browser button
// shims require the button to exist in the DOM at all times.
if ( ! attached ) {
id = 'wp-uploader-browser-' + this.uploader.id;
container = $( '#' + id );
if ( ! container.length ) {
container = $('<div class="wp-uploader-browser" />').css({
position: 'fixed',
top: '-1000px',
left: '-1000px',
height: 0,
width: 0
}).attr( 'id', 'wp-uploader-browser-' + this.uploader.id ).appendTo('body');
}
container.append( this.browser );
}
}
this.uploader.refresh();
}
});
// Create a collection of attachments in the upload queue,
// so that other modules can track and display upload progress.
Uploader.queue = new wp.media.model.Attachments( [], { query: false });
// Create a collection to collect errors incurred while attempting upload.
Uploader.errors = new Backbone.Collection();
exports.Uploader = Uploader;
})( wp, jQuery );