/* global pluploadL10n, plupload, _wpPluploadSettings */

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/**

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* @namespace wp

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*/

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window.wp = window.wp || {};

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( function( exports, $ ) {

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var Uploader;

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if ( typeof _wpPluploadSettings === 'undefined' ) {

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return;

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}

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/**

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* A WordPress uploader.

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*

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* The Plupload library provides cross-browser uploader UI integration.

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* This object bridges the Plupload API to integrate uploads into the

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* WordPress back end and the WordPress media experience.

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*

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* @class

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* @memberOf wp

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* @alias wp.Uploader

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*

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* @param {object} options The options passed to the new plupload instance.

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* @param {object} options.container The id of uploader container.

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* @param {object} options.browser The id of button to trigger the file select.

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* @param {object} options.dropzone The id of file drop target.

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* @param {object} options.plupload An object of parameters to pass to the plupload instance.

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* @param {object} options.params An object of parameters to pass to $_POST when uploading the file.

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* Extends this.plupload.multipart_params under the hood.

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*/

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Uploader = function( options ) {

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var self = this,

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isIE, // Not used, back-compat.

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elements = {

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container: 'container',

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browser: 'browse_button',

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dropzone: 'drop_element'

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},

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tryAgainCount = {},

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tryAgain,

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key,

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error,

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fileUploaded;

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this.supports = {

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upload: Uploader.browser.supported

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};

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this.supported = this.supports.upload;

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if ( ! this.supported ) {

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return;

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}

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// Arguments to send to pluplad.Uploader().

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// Use deep extend to ensure that multipart_params and other objects are cloned.

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this.plupload = $.extend( true, { multipart_params: {} }, Uploader.defaults );

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this.container = document.body; // Set default container.

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/*

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* Extend the instance with options.

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*

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* Use deep extend to allow options.plupload to override individual

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* default plupload keys.

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*/

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$.extend( true, this, options );

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// Proxy all methods so this always refers to the current instance.

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for ( key in this ) {

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if ( typeof this[ key ] === 'function' ) {

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this[ key ] = $.proxy( this[ key ], this );

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}

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}

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// Ensure all elements are jQuery elements and have id attributes,

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// then set the proper plupload arguments to the ids.

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for ( key in elements ) {

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if ( ! this[ key ] ) {

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continue;

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}

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this[ key ] = $( this[ key ] ).first();

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if ( ! this[ key ].length ) {

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delete this[ key ];

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continue;

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}

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if ( ! this[ key ].prop('id') ) {

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this[ key ].prop( 'id', '__wp-uploader-id-' + Uploader.uuid++ );

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}

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this.plupload[ elements[ key ] ] = this[ key ].prop('id');

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}

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// If the uploader has neither a browse button nor a dropzone, bail.

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if ( ! ( this.browser && this.browser.length ) && ! ( this.dropzone && this.dropzone.length ) ) {

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return;

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}

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// Initialize the plupload instance.

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this.uploader = new plupload.Uploader( this.plupload );

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delete this.plupload;

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// Set default params and remove this.params alias.

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this.param( this.params || {} );

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delete this.params;

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/**

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* Attempt to create image sub-sizes when an image was uploaded successfully

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* but the server responded with HTTP 5xx error.

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*

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* @since 5.3.0

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*

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* @param {string} message Error message.

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* @param {object} data Error data from Plupload.

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* @param {plupload.File} file File that was uploaded.

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*/

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tryAgain = function( message, data, file ) {

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var times, id;

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if ( ! data || ! data.responseHeaders ) {

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error( pluploadL10n.http_error_image, data, file, 'no-retry' );

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return;

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}

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id = data.responseHeaders.match( /x-wp-upload-attachment-id:\s*(\d+)/i );

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if ( id && id[1] ) {

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id = id[1];

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} else {

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error( pluploadL10n.http_error_image, data, file, 'no-retry' );

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return;

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}

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times = tryAgainCount[ file.id ];

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if ( times && times > 4 ) {

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/*

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* The file may have been uploaded and attachment post created,

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* but post-processing and resizing failed...

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* Do a cleanup then tell the user to scale down the image and upload it again.

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*/

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$.ajax({

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type: 'post',

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url: ajaxurl,

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dataType: 'json',

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data: {

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action: 'media-create-image-subsizes',

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_wpnonce: _wpPluploadSettings.defaults.multipart_params._wpnonce,

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attachment_id: id,

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_wp_upload_failed_cleanup: true,

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}

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});

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error( message, data, file, 'no-retry' );

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return;

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}

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if ( ! times ) {

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tryAgainCount[ file.id ] = 1;

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} else {

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tryAgainCount[ file.id ] = ++times;

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}

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// Another request to try to create the missing image sub-sizes.

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$.ajax({

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type: 'post',

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url: ajaxurl,

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dataType: 'json',

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data: {

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action: 'media-create-image-subsizes',

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_wpnonce: _wpPluploadSettings.defaults.multipart_params._wpnonce,

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attachment_id: id,

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}

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}).done( function( response ) {

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if ( response.success ) {

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fileUploaded( self.uploader, file, response );

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} else {

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if ( response.data && response.data.message ) {

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message = response.data.message;

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}

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error( message, data, file, 'no-retry' );

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}

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}).fail( function( jqXHR ) {

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// If another HTTP 5xx error, try try again...

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if ( jqXHR.status >= 500 && jqXHR.status < 600 ) {

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tryAgain( message, data, file );

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return;

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}

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error( message, data, file, 'no-retry' );

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});

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}

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/**

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* Custom error callback.

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*

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* Add a new error to the errors collection, so other modules can track

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* and display errors. @see wp.Uploader.errors.

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*

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* @param {string} message Error message.

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* @param {object} data Error data from Plupload.

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* @param {plupload.File} file File that was uploaded.

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* @param {string} retry Whether to try again to create image sub-sizes. Passing 'no-retry' will prevent it.

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*/

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error = function( message, data, file, retry ) {

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var isImage = file.type && file.type.indexOf( 'image/' ) === 0,

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status = data && data.status;

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// If the file is an image and the error is HTTP 5xx try to create sub-sizes again.

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if ( retry !== 'no-retry' && isImage && status >= 500 && status < 600 ) {

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tryAgain( message, data, file );

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return;

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}

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if ( file.attachment ) {

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file.attachment.destroy();

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}

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Uploader.errors.unshift({

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message: message || pluploadL10n.default_error,

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data: data,

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file: file

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});

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self.error( message, data, file );

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};

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/**

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* After a file is successfully uploaded, update its model.

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*

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* @param {plupload.Uploader} up Uploader instance.

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* @param {plupload.File} file File that was uploaded.

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* @param {Object} response Object with response properties.

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*/

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fileUploaded = function( up, file, response ) {

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var complete;

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// Remove the "uploading" UI elements.

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_.each( ['file','loaded','size','percent'], function( key ) {

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file.attachment.unset( key );

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} );

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file.attachment.set( _.extend( response.data, { uploading: false } ) );

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wp.media.model.Attachment.get( response.data.id, file.attachment );

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complete = Uploader.queue.all( function( attachment ) {

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return ! attachment.get( 'uploading' );

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});

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if ( complete ) {

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Uploader.queue.reset();

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}

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self.success( file.attachment );

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}

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/**

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* After the Uploader has been initialized, initialize some behaviors for the dropzone.

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*

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* @param {plupload.Uploader} uploader Uploader instance.

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*/

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this.uploader.bind( 'init', function( uploader ) {

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var timer, active, dragdrop,

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dropzone = self.dropzone;

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dragdrop = self.supports.dragdrop = uploader.features.dragdrop && ! Uploader.browser.mobile;

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// Generate drag/drop helper classes.

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if ( ! dropzone ) {

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return;

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}

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dropzone.toggleClass( 'supports-drag-drop', !! dragdrop );

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if ( ! dragdrop ) {

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return dropzone.unbind('.wp-uploader');

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}

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// 'dragenter' doesn't fire correctly, simulate it with a limited 'dragover'.

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dropzone.on( 'dragover.wp-uploader', function() {

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if ( timer ) {

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clearTimeout( timer );

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}

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if ( active ) {

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return;

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}

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dropzone.trigger('dropzone:enter').addClass('drag-over');

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active = true;

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});

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dropzone.on('dragleave.wp-uploader, drop.wp-uploader', function() {

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/*

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* Using an instant timer prevents the drag-over class

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* from being quickly removed and re-added when elements

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* inside the dropzone are repositioned.

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*

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* @see https://core.trac.wordpress.org/ticket/21705

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*/

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timer = setTimeout( function() {

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active = false;

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dropzone.trigger('dropzone:leave').removeClass('drag-over');

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}, 0 );

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});

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self.ready = true;

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$(self).trigger( 'uploader:ready' );

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});

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this.uploader.bind( 'postinit', function( up ) {

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up.refresh();

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self.init();

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});

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this.uploader.init();

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if ( this.browser ) {

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this.browser.on( 'mouseenter', this.refresh );

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} else {

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this.uploader.disableBrowse( true );

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}

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$( self ).on( 'uploader:ready', function() {

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$( '.moxie-shim-html5 input[type="file"]' )

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.attr( {

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tabIndex: '-1',

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'aria-hidden': 'true'

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} );

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} );

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/**

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* After files were filtered and added to the queue, create a model for each.

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*

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* @param {plupload.Uploader} up Uploader instance.

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* @param {Array} files Array of file objects that were added to queue by the user.

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*/

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this.uploader.bind( 'FilesAdded', function( up, files ) {

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_.each( files, function( file ) {

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var attributes, image;

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// Ignore failed uploads.

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if ( plupload.FAILED === file.status ) {

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return;

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}

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if ( file.type === 'image/heic' && up.settings.heic_upload_error ) {

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// Show error but do not block uploading.

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Uploader.errors.unshift({

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message: pluploadL10n.unsupported_image,

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data: {},

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file: file

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});

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}

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// Generate attributes for a new `Attachment` model.

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attributes = _.extend({

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file: file,

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uploading: true,

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date: new Date(),

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filename: file.name,

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menuOrder: 0,

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uploadedTo: wp.media.model.settings.post.id

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}, _.pick( file, 'loaded', 'size', 'percent' ) );

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// Handle early mime type scanning for images.

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image = /(?:jpe?g|png|gif)$/i.exec( file.name );

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// For images set the model's type and subtype attributes.

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if ( image ) {

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attributes.type = 'image';

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// `jpeg`, `png` and `gif` are valid subtypes.

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// `jpg` is not, so map it to `jpeg`.

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attributes.subtype = ( 'jpg' === image[0] ) ? 'jpeg' : image[0];

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}

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// Create a model for the attachment, and add it to the Upload queue collection

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// so listeners to the upload queue can track and display upload progress.

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file.attachment = wp.media.model.Attachment.create( attributes );

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Uploader.queue.add( file.attachment );

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self.added( file.attachment );

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});

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up.refresh();

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up.start();

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});

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this.uploader.bind( 'UploadProgress', function( up, file ) {

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file.attachment.set( _.pick( file, 'loaded', 'percent' ) );

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self.progress( file.attachment );

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});

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/**

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* After a file is successfully uploaded, update its model.

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*

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* @param {plupload.Uploader} up Uploader instance.

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* @param {plupload.File} file File that was uploaded.

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* @param {Object} response Object with response properties.

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* @return {mixed}

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*/

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this.uploader.bind( 'FileUploaded', function( up, file, response ) {

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try {

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response = JSON.parse( response.response );

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} catch ( e ) {

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return error( pluploadL10n.default_error, e, file );

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}

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if ( ! _.isObject( response ) || _.isUndefined( response.success ) ) {

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return error( pluploadL10n.default_error, null, file );

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} else if ( ! response.success ) {

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return error( response.data && response.data.message, response.data, file );

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}

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// Success. Update the UI with the new attachment.

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fileUploaded( up, file, response );

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});

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/**

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* When plupload surfaces an error, send it to the error handler.

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*

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* @param {plupload.Uploader} up Uploader instance.

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* @param {Object} pluploadError Contains code, message and sometimes file and other details.

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*/

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this.uploader.bind( 'Error', function( up, pluploadError ) {

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var message = pluploadL10n.default_error,

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key;

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// Check for plupload errors.

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for ( key in Uploader.errorMap ) {

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if ( pluploadError.code === plupload[ key ] ) {

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message = Uploader.errorMap[ key ];

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if ( typeof message === 'function' ) {

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message = message( pluploadError.file, pluploadError );

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}

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break;

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}

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}

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error( message, pluploadError, pluploadError.file );

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up.refresh();

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});

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};

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// Adds the 'defaults' and 'browser' properties.

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$.extend( Uploader, _wpPluploadSettings );

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Uploader.uuid = 0;

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// Map Plupload error codes to user friendly error messages.

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Uploader.errorMap = {

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'FAILED': pluploadL10n.upload_failed,

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'FILE_EXTENSION_ERROR': pluploadL10n.invalid_filetype,

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'IMAGE_FORMAT_ERROR': pluploadL10n.not_an_image,

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'IMAGE_MEMORY_ERROR': pluploadL10n.image_memory_exceeded,

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'IMAGE_DIMENSIONS_ERROR': pluploadL10n.image_dimensions_exceeded,

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'GENERIC_ERROR': pluploadL10n.upload_failed,

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'IO_ERROR': pluploadL10n.io_error,

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'SECURITY_ERROR': pluploadL10n.security_error,

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'FILE_SIZE_ERROR': function( file ) {

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return pluploadL10n.file_exceeds_size_limit.replace( '%s', file.name );

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},

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'HTTP_ERROR': function( file ) {

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if ( file.type && file.type.indexOf( 'image/' ) === 0 ) {

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return pluploadL10n.http_error_image;

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}

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return pluploadL10n.http_error;

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},

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};

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$.extend( Uploader.prototype, /** @lends wp.Uploader.prototype */{

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/**

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* Acts as a shortcut to extending the uploader's multipart_params object.

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*

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* param( key )

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* Returns the value of the key.

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*

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* param( key, value )

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* Sets the value of a key.

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*

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* param( map )

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* Sets values for a map of data.

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*/

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param: function( key, value ) {

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if ( arguments.length === 1 && typeof key === 'string' ) {

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