Ticket #24756: 24756.3.diff

wp-includes/js/autosave.js

@@ -1 +1 @@
 var autosave, autosaveLast = '', autosavePeriodical, autosaveDelayPreview = false, notSaved = true, blockSave = false, fullscreen, autosaveLockRelease = true;
 
 jQuery(document).ready( function($) {
 
         if ( $('#wp-content-wrap').hasClass('tmce-active') && typeof tinymce != 'undefined' ) {
                 tinymce.onAddEditor.add( function( tinymce, editor ) {
                         if ( 'content' == editor.id ) {
                                 editor.onLoad.add( function() {
                                         editor.save();
-                                        autosaveLast = ( $('#title').val() || '' ) + ( $('#content').val() || '' );
+                                        autosaveLast = wp.autosave.getLastSavedCompareString();
                                 });
                         }
                 });
         } else {
-                autosaveLast = ( $('#title').val() || '' ) + ( $('#content').val() || '' );
+                autosaveLast = wp.autosave.getLastSavedCompareString();
         }
 
         autosavePeriodical = $.schedule({time: autosaveL10n.autosaveInterval * 1000, func: function() { autosave(); }, repeat: true, protect: true});
 
         //Disable autosave after the form has been submitted
         $("#post").submit(function() {
                 $.cancel(autosavePeriodical);
                 autosaveLockRelease = false;
         });
 
         $('input[type="submit"], a.submitdelete', '#submitpost').click(function(){
                 blockSave = true;
                 window.onbeforeunload = null;
                 $(':button, :submit', '#submitpost').each(function(){
                         var t = $(this);
                         if ( t.hasClass('button-primary') )
                                 t.addClass('button-primary-disabled');
                         else
                                 t.addClass('button-disabled');
                 });
                 if ( $(this).attr('id') == 'publish' )
                         $('#major-publishing-actions .spinner').show();
                 else
                         $('#minor-publishing .spinner').show();
         });
 
         window.onbeforeunload = function(){
-                var mce = typeof(tinymce) != 'undefined' ? tinymce.activeEditor : false, title, content;
+                var editor = typeof(tinymce) != 'undefined' ? tinymce.activeEditor : false, compareString;
 
-                if ( mce && !mce.isHidden() ) {
-                        if ( mce.isDirty() )
+                if ( editor && ! editor.isHidden() ) {
+                        if ( editor.isDirty() )
                                 return autosaveL10n.saveAlert;
                 } else {
                         if ( fullscreen && fullscreen.settings.visible ) {
-                                title = $('#wp-fullscreen-title').val() || '';
-                                content = $("#wp_mce_fullscreen").val() || '';
+                                compareString = wp.autosave.getLastSavedCompareString({
+                                        post_title: $('#wp-fullscreen-title').val() || '',
+                                        content: $('#wp_mce_fullscreen').val() || '',
+                                        excerpt: $('#excerpt').val() || ''
+                                });
                         } else {
-                                title = $('#post #title').val() || '';
-                                content = $('#post #content').val() || '';
+                                compareString = wp.autosave.getLastSavedCompareString();
                         }
 
-                        if ( ( title || content ) && title + content != autosaveLast )
+                        if ( compareString != autosaveLast )
                                 return autosaveL10n.saveAlert;
                 }
         };
 
         $(window).unload( function(e) {
                 if ( ! autosaveLockRelease )
                         return;
 
                 // unload fires (twice) on removing the Thickbox iframe. Make sure we process only the main document unload.
                 if ( e.target && e.target.nodeName != '#document' )
                         return;
 
                 $.ajax({
                         type: 'POST',
                         url: ajaxurl,
                         async: false,
                         data: {
                                 action: 'wp-remove-post-lock',
                                 _wpnonce: $('#_wpnonce').val(),
                                 post_ID: $('#post_ID').val(),
                                 active_post_lock: $('#active_post_lock').val()
                         }
                 });
         } );
 
         // preview
         $('#post-preview').click(function(){
                 if ( $('#auto_draft').val() == '1' && notSaved ) {
                         autosaveDelayPreview = true;
                         autosave();
                         return false;
                 }
                 doPreview();
                 return false;
         });
 
         doPreview = function() {
                 $('input#wp-preview').val('dopreview');
                 $('form#post').attr('target', 'wp-preview').submit().attr('target', '');
 
                 /*
                  * Workaround for WebKit bug preventing a form submitting twice to the same action.
                  * https://bugs.webkit.org/show_bug.cgi?id=28633
                  */
                 var ua = navigator.userAgent.toLowerCase();
                 if ( ua.indexOf('safari') != -1 && ua.indexOf('chrome') == -1 ) {
                         $('form#post').attr('action', function(index, value) {
                                 return value + '?t=' + new Date().getTime();
                         });
                 }
 
                 $('input#wp-preview').val('');
         }
 
         // This code is meant to allow tabbing from Title to Post content.
         $('#title').on('keydown.editor-focus', function(e) {
                 var ed;
 
                 if ( e.which != 9 )
                         return;
 
                 if ( !e.ctrlKey && !e.altKey && !e.shiftKey ) {
                         if ( typeof(tinymce) != 'undefined' )
                                 ed = tinymce.get('content');
 
                         if ( ed && !ed.isHidden() ) {
                                 $(this).one('keyup', function(e){
                                         $('#content_tbl td.mceToolbar > a').focus();
                                 });
                         } else {
                                 $('#content').focus();
                         }
 
                         e.preventDefault();
                 }
         });
 
         // autosave new posts after a title is typed but not if Publish or Save Draft is clicked
         if ( '1' == $('#auto_draft').val() ) {
                 $('#title').blur( function() {
                         if ( !this.value || $('#auto_draft').val() != '1' )
                                 return;
                         delayed_autosave();
                 });
         }
 
         // When connection is lost, keep user from submitting changes.
         $(document).on('heartbeat-connection-lost.autosave', function( e, error ) {
                 if ( 'timeout' === error ) {
                         var notice = $('#lost-connection-notice');
                         if ( ! wp.autosave.local.hasStorage ) {
                                 notice.find('.hide-if-no-sessionstorage').hide();
                         }
                         notice.show();
                         autosave_disable_buttons();
                 }
         }).on('heartbeat-connection-restored.autosave', function() {
                 $('#lost-connection-notice').hide();
                 autosave_enable_buttons();
         });
 });
 
 function autosave_parse_response( response ) {
         var res = wpAjax.parseAjaxResponse(response, 'autosave'), post_id, sup;
 
         if ( res && res.responses && res.responses.length ) {
                 if ( res.responses[0].supplemental ) {
                         sup = res.responses[0].supplemental;
 
                         jQuery.each( sup, function( selector, value ) {
                                 if ( selector.match(/^replace-/) )
                                         jQuery( '#' + selector.replace('replace-', '') ).val( value );
                         });
                 }
 
                 // if no errors: add slug UI and update autosave-message
                 if ( !res.errors ) {
                         if ( post_id = parseInt( res.responses[0].id, 10 ) )
                                 autosave_update_slug( post_id );
 
                         if ( res.responses[0].data ) // update autosave message
                                 jQuery('.autosave-message').text( res.responses[0].data );
                 }
         }
 
         return res;
 }
 
 // called when autosaving pre-existing post
 function autosave_saved(response) {
         blockSave = false;
         autosave_parse_response(response); // parse the ajax response
         autosave_enable_buttons(); // re-enable disabled form buttons
 }
 
 // called when autosaving new post
 function autosave_saved_new(response) {
         blockSave = false;
         var res = autosave_parse_response(response), post_id;
 
         if ( res && res.responses.length && !res.errors ) {
                 // An ID is sent only for real auto-saves, not for autosave=0 "keepalive" saves
                 post_id = parseInt( res.responses[0].id, 10 );
 
                 if ( post_id ) {
                         notSaved = false;
                         jQuery('#auto_draft').val('0'); // No longer an auto-draft
                 }
 
                 autosave_enable_buttons();
 
                 if ( autosaveDelayPreview ) {
                         autosaveDelayPreview = false;
                         doPreview();
                 }
         } else {
                 autosave_enable_buttons(); // re-enable disabled form buttons
         }
 }
 
 function autosave_update_slug(post_id) {
         // create slug area only if not already there
         if ( 'undefined' != makeSlugeditClickable && jQuery.isFunction(makeSlugeditClickable) && !jQuery('#edit-slug-box > *').size() ) {
                 jQuery.post( ajaxurl, {
                                 action: 'sample-permalink',
                                 post_id: post_id,
                                 new_title: fullscreen && fullscreen.settings.visible ? jQuery('#wp-fullscreen-title').val() : jQuery('#title').val(),
                                 samplepermalinknonce: jQuery('#samplepermalinknonce').val()
                         },
                         function(data) {
                                 if ( data !== '-1' ) {
                                         var box = jQuery('#edit-slug-box');
                                         box.html(data);
                                         if (box.hasClass('hidden')) {
                                                 box.fadeIn('fast', function () {
                                                         box.removeClass('hidden');
                                                 });
                                         }
                                         makeSlugeditClickable();
                                 }
                         }
                 );
         }
 }
 
 function autosave_loading() {
         jQuery('.autosave-message').html(autosaveL10n.savingText);
 }
 
 function autosave_enable_buttons() {
         jQuery(document).trigger('autosave-enable-buttons');
-        if ( ! wp.heartbeat.hasConnectionError() ) {
+        if ( ! wp.heartbeat || ! wp.heartbeat.hasConnectionError() ) {
                 // delay that a bit to avoid some rare collisions while the DOM is being updated.
                 setTimeout(function(){
                         var parent = jQuery('#submitpost');
                         parent.find(':button, :submit').removeAttr('disabled');
                         parent.find('.spinner').hide();
                 }, 500);
         }
 }
 
 function autosave_disable_buttons() {
         jQuery(document).trigger('autosave-disable-buttons');
         jQuery('#submitpost').find(':button, :submit').prop('disabled', true);
         // Re-enable 5 sec later. Just gives autosave a head start to avoid collisions.
         setTimeout( autosave_enable_buttons, 5000 );
 }
 
 function delayed_autosave() {
         setTimeout(function(){
                 if ( blockSave )
                         return;
                 autosave();
         }, 200);
 }
 
 autosave = function() {
         var post_data = wp.autosave.getPostData(),
-                doAutoSave = post_data.autosave,
+                compareString,
                 successCallback;
 
         blockSave = true;
 
+        // post_data.content cannot be retrieved at the moment
+        if ( ! post_data.autosave )
+                return false;
+
         // No autosave while thickbox is open (media buttons)
         if ( jQuery("#TB_window").css('display') == 'block' )
-                doAutoSave = false;
+                return false;
 
-        // Nothing to save or no change.
-        if ( ( post_data["post_title"].length == 0 && post_data["content"].length == 0 ) || post_data["post_title"] + post_data["content"] == autosaveLast ) {
-                doAutoSave = false;
-        }
+        compareString = wp.autosave.getLastSavedCompareString( post_data );
 
-        if ( doAutoSave ) {
-                autosaveLast = post_data["post_title"] + post_data["content"];
-                jQuery(document).triggerHandler('wpcountwords', [ post_data["content"] ]);
-        } else {
+        // Nothing to save or no change.
+        if ( compareString == autosaveLast )
                 return false;
-        }
+
+        autosaveLast = compareString;
+        jQuery(document).triggerHandler('wpcountwords', [ post_data["content"] ]);
 
         // Disable buttons until we know the save completed.
         autosave_disable_buttons();
 
         if ( post_data["auto_draft"] == '1' ) {
                 successCallback = autosave_saved_new; // new post
         } else {
                 successCallback = autosave_saved; // pre-existing post
         }
 
         jQuery.ajax({
                 data: post_data,
-                beforeSend: doAutoSave ? autosave_loading : null,
+                beforeSend: autosave_loading,
                 type: "POST",
                 url: ajaxurl,
                 success: successCallback
         });
 
         return true;
 }
 
 // Autosave in localStorage
 // set as simple object/mixin for now
 window.wp = window.wp || {};
 wp.autosave = wp.autosave || {};
 
 (function($){
 // Returns the data for saving in both localStorage and autosaves to the server
 wp.autosave.getPostData = function() {
         var ed = typeof tinymce != 'undefined' ? tinymce.activeEditor : null, post_name, parent_id, cats = [],
                 data = {
                         action: 'autosave',
                         autosave: true,
                         post_id: $('#post_ID').val() || 0,
                         autosavenonce: $('#autosavenonce').val() || '',
                         post_type: $('#post_type').val() || '',
                         post_author: $('#post_author').val() || '',
                         excerpt: $('#excerpt').val() || ''
                 };
 
         if ( ed && !ed.isHidden() ) {
                 // Don't run while the tinymce spellcheck is on. It resets all found words.
                 if ( ed.plugins.spellchecker && ed.plugins.spellchecker.active ) {
                         data.autosave = false;
                         return data;
                 } else {
                         if ( 'mce_fullscreen' == ed.id )
                                 tinymce.get('content').setContent(ed.getContent({format : 'raw'}), {format : 'raw'});
 
                         tinymce.triggerSave();
                 }
         }
 
         if ( typeof fullscreen != 'undefined' && fullscreen.settings.visible ) {
                 data['post_title'] = $('#wp-fullscreen-title').val() || '';
                 data['content'] = $('#wp_mce_fullscreen').val() || '';
         } else {
                 data['post_title'] = $('#title').val() || '';
                 data['content'] = $('#content').val() || '';
         }
 
         /*
         // We haven't been saving tags with autosave since 2.8... Start again?
         $('.the-tags').each( function() {
                 data[this.name] = this.value;
         });
         */
 
         $('input[id^="in-category-"]:checked').each( function() {
                 cats.push(this.value);
         });
         data['catslist'] = cats.join(',');
 
         if ( post_name = $('#post_name').val() )
                 data['post_name'] = post_name;
 
         if ( parent_id = $('#parent_id').val() )
                 data['parent_id'] = parent_id;
 
         if ( $('#comment_status').prop('checked') )
                 data['comment_status'] = 'open';
 
         if ( $('#ping_status').prop('checked') )
                 data['ping_status'] = 'open';
 
         if ( $('#auto_draft').val() == '1' )
                 data['auto_draft'] = '1';
 
         return data;
-}
+};
+
+// Concatenate title, content and excerpt. Used to track changes when auto-saving.
+wp.autosave.getLastSavedCompareString = function( post_data ) {
+        if ( typeof post_data === 'object' ) {
+                return ( post_data.post_title || '' ) + '::' + ( post_data.content || '' ) + '::' + ( post_data.excerpt || '' );
+        }
+
+        return ( $('#title').val() || '' ) + '::' + ( $('#content').val() || '' ) + '::' + ( $('#excerpt').val() || '' );
+};
 
 wp.autosave.local = {
 
         lastsaveddata: '',
         blog_id: 0,
-        ajaxurl: window.ajaxurl || 'wp-admin/admin-ajax.php',
         hasStorage: false,
 
         // Check if the browser supports sessionStorage and it's not disabled
         checkStorage: function() {
                 var test = Math.random(), result = false;
 
                 try {
                         sessionStorage.setItem('wp-test', test);
                         result = sessionStorage.getItem('wp-test') == test;
                         sessionStorage.removeItem('wp-test');
                 } catch(e) {}
 
                 this.hasStorage = result;
                 return result;
     },
 
         /**
          * Initialize the local storage
          *
          * @return mixed False if no sessionStorage in the browser or an Object containing all post_data for this blog
          */
         getStorage: function() {
                 var stored_obj = false;
                 // Separate local storage containers for each blog_id
                 if ( this.hasStorage && this.blog_id ) {
                         stored_obj = sessionStorage.getItem( 'wp-autosave-' + this.blog_id );
 
                         if ( stored_obj )
                                 stored_obj = JSON.parse( stored_obj );
                         else
                                 stored_obj = {};
                 }
 
                 return stored_obj;
         },
 
         /**
          * Set the storage for this blog
          *
          * Confirms that the data was saved successfully.
          *
          * @return bool
          */
         setStorage: function( stored_obj ) {
                 var key;
 
                 if ( this.hasStorage && this.blog_id ) {
                         key = 'wp-autosave-' + this.blog_id;
                         sessionStorage.setItem( key, JSON.stringify( stored_obj ) );
                         return sessionStorage.getItem( key ) !== null;
                 }
 
                 return false;
         },
 
         /**
          * Get the saved post data for the current post
          *
          * @return mixed False if no storage or no data or the post_data as an Object
          */
         getData: function() {
                 var stored = this.getStorage(), post_id = $('#post_ID').val();
 
                 if ( !stored || !post_id )
                         return false;
 
                 return stored[ 'post_' + post_id ] || false;
         },
 
         /**
          * Set (save or delete) post data in the storage.
          *
          * If stored_data evaluates to 'false' the storage key for the current post will be removed
          *
          * $param stored_data The post data to store or null/false/empty to delete the key
          * @return bool
          */
         setData: function( stored_data ) {
                 var stored = this.getStorage(), post_id = $('#post_ID').val();
 
                 if ( !stored || !post_id )
                         return false;
 
                 if ( stored_data )
                         stored[ 'post_' + post_id ] = stored_data;
                 else if ( stored.hasOwnProperty( 'post_' + post_id ) )
                         delete stored[ 'post_' + post_id ];
                 else
                         return false;
 
                 return this.setStorage(stored);
         },
 
         /**
          * Save post data for the current post
          *
          * Runs on a 15 sec. schedule, saves when there are differences in the post title or content.
          * When the optional data is provided, updates the last saved post data.
          *
          * $param data optional Object The post data for saving, minimum 'post_title' and 'content'
          * @return bool
          */
         save: function( data ) {
-                var result = false;
+                var result = false, post_data, compareString;
 
                 if ( ! data ) {
                         post_data = wp.autosave.getPostData();
                 } else {
                         post_data = this.getData() || {};
                         $.extend( post_data, data );
                         post_data.autosave = true;
                 }
 
-                // If the content and title did not change since the last save, don't save again
-                if ( post_data.post_title + ': ' + post_data.content == this.lastsaveddata )
+                // Cannot get the post data at the moment
+                if ( ! post_data.autosave )
                         return false;
 
-                // Cannot get the post data at the moment
-                if ( !post_data.autosave )
+                compareString = wp.autosave.getLastSavedCompareString( post_data );
+
+                // If the content, title and excerpt did not change since the last save, don't save again
+                if ( compareString == this.lastsaveddata )
                         return false;
 
                 post_data['save_time'] = (new Date()).getTime();
                 post_data['status'] = $('#post_status').val() || '';
                 result = this.setData( post_data );
 
                 if ( result )
-                        this.lastsaveddata = post_data.post_title + ': ' + post_data.content;
+                        this.lastsaveddata = compareString;
 
                 return result;
         },
 
         // Initialize and run checkPost() on loading the script (before TinyMCE init)
         init: function( settings ) {
                 var self = this;
 
-                // Check if the browser supports sessionStorage and editor.js is loaded
-                if ( ! this.checkStorage() || typeof switchEditors == 'undefined' )
+                // Check if the browser supports sessionStorage and it's not disabled
+                if ( ! this.checkStorage() )
                         return;
 
                 // Don't run if the post type supports neither 'editor' (textarea#content) nor 'excerpt'.
                 if ( ! $('#content').length && ! $('#excerpt').length )
                         return;
 
                 if ( settings )
                         $.extend( this, settings );
 
                 if ( !this.blog_id )
                         this.blog_id = typeof window.autosaveL10n != 'undefined' ? window.autosaveL10n.blog_id : 0;
 
-                this.checkPost();
                 $(document).ready( function(){ self.run(); } );
         },
 
         // Run on DOM ready
         run: function() {
-                var self = this, post_data;
-
-                // Set the comparison string
-                if ( !this.lastsaveddata ) {
-                        post_data = wp.autosave.getPostData();
+                var self = this;
 
-                        if ( post_data.content && $('#wp-content-wrap').hasClass('tmce-active') )
-                                this.lastsaveddata = post_data.post_title + ': ' + switchEditors.pre_wpautop( post_data.content );
-                        else
-                                this.lastsaveddata = post_data.post_title + ': ' + post_data.content;
-                }
+                // Check if the local post data is different than the loaded post data.
+                this.checkPost();
 
                 // Set the schedule
                 this.schedule = $.schedule({
                         time: 15 * 1000,
                         func: function() { wp.autosave.local.save(); },
                         repeat: true,
                         protect: true
                 });
 
                 $('form#post').on('submit.autosave-local', function() {
                         var editor = typeof tinymce != 'undefined' && tinymce.get('content'), post_id = $('#post_ID').val() || 0;
 
                         if ( editor && ! editor.isHidden() ) {
                                 // Last onSubmit event in the editor, needs to run after the content has been moved to the textarea.
                                 editor.onSubmit.add( function() {
                                         wp.autosave.local.save({
                                                 post_title: $('#title').val() || '',
                                                 content: $('#content').val() || '',
                                                 excerpt: $('#excerpt').val() || ''
                                         });
                                 });
                         } else {
                                 self.save({
                                         post_title: $('#title').val() || '',
                                         content: $('#content').val() || '',
                                         excerpt: $('#excerpt').val() || ''
                                 });
                         }
 
                         wpCookies.set( 'wp-saving-post-' + post_id, 'check' );
                 });
         },
 
         // Strip whitespace and compare two strings
         compare: function( str1, str2 ) {
                 function remove( string ) {
                         return string.toString().replace(/[\x20\t\r\n\f]+/g, '');
                 }
 
                 return ( remove( str1 || '' ) == remove( str2 || '' ) );
         },
 
         /**
          * Check if the saved data for the current post (if any) is different than the loaded post data on the screen
          *
          * Shows a standard message letting the user restore the post data if different.
          *
          * @return void
          */
         checkPost: function() {
-                var self = this, post_data = this.getData(), content, check_data, strip_tags = false, notice,
+                var self = this, post_data = this.getData(), content, post_title, excerpt, notice,
                         post_id = $('#post_ID').val() || 0, cookie = wpCookies.get( 'wp-saving-post-' + post_id );
 
                 if ( ! post_data )
                         return;
 
                 if ( cookie ) {
                         wpCookies.remove( 'wp-saving-post-' + post_id );
 
                         if ( cookie == 'saved' ) {
                                 // The post was saved properly, remove old data and bail
                                 this.setData( false );
                                 return;
                         }
                 }
 
                 // There is a newer autosave. Don't show two "restore" notices at the same time.
                 if ( $('#has-newer-autosave').length )
                         return;
 
-                // cookie == 'check' means the post was not saved properly, always show #local-storage-notice
-                if ( cookie != 'check' ) {
-                        content = $('#content').val();
-                        check_data = $.extend( {}, post_data );
+                content = $('#content').val() || '';
+                post_title = $('#title').val() || '';
+                excerpt = $('#excerpt').val() || '';
 
-                        if ( $('#wp-content-wrap').hasClass('tmce-active') )
-                                content = switchEditors.pre_wpautop( content );
+                if ( $('#wp-content-wrap').hasClass('tmce-active') && typeof switchEditors != 'undefined' )
+                        content = switchEditors.pre_wpautop( content );
 
-                        if ( this.compare( content, check_data.content ) && this.compare( $('#title').val(), check_data.post_title ) && this.compare( $('#excerpt').val(), check_data.excerpt ) )
-                                return;
+                // cookie == 'check' means the post was not saved properly, always show #local-storage-notice
+                if ( cookie != 'check' && this.compare( content, post_data.content ) && this.compare( post_title, post_data.post_title ) && this.compare( excerpt, post_data.excerpt ) ) {
+                        return;
                 }
 
                 this.restore_post_data = post_data;
-                this.undo_post_data = wp.autosave.getPostData();
+                this.undo_post_data = {
+                        content: content,
+                        post_title: post_title,
+                        excerpt: excerpt
+                };
 
                 notice = $('#local-storage-notice');
                 $('.wrap h2').first().after( notice.addClass('updated').show() );
 
                 notice.on( 'click', function(e) {
                         var target = $( e.target );
 
                         if ( target.hasClass('restore-backup') ) {
                                 self.restorePost( self.restore_post_data );
                                 target.parent().hide();
                                 $(this).find('p.undo-restore').show();
                         } else if ( target.hasClass('undo-restore-backup') ) {
                                 self.restorePost( self.undo_post_data );
                                 target.parent().hide();
                                 $(this).find('p.local-restore').show();
                         }
 
                         e.preventDefault();
                 });
         },
 
         // Restore the current title, content and excerpt from post_data.
         restorePost: function( post_data ) {
                 var editor;
 
                 if ( post_data ) {
                         // Set the last saved data
-                        this.lastsaveddata = post_data.post_title + ': ' + post_data.content;
+                        this.lastsaveddata = wp.autosave.getLastSavedCompareString( post_data );
 
                         if ( $('#title').val() != post_data.post_title )
                                 $('#title').focus().val( post_data.post_title || '' );
 
                         $('#excerpt').val( post_data.excerpt || '' );
                         editor = typeof tinymce != 'undefined' && tinymce.get('content');
 
-                        if ( editor && ! editor.isHidden() ) {
+                        if ( editor && ! editor.isHidden() && typeof switchEditors != 'undefined' ) {
                                 // Make sure there's an undo level in the editor
                                 editor.undoManager.add();
                                 editor.setContent( post_data.content ? switchEditors.wpautop( post_data.content ) : '' );
                         } else {
                                 // Make sure the Text editor is selected
                                 $('#content-html').click();
                                 $('#content').val( post_data.content );
                         }
 
                         return true;
                 }
 
                 return false;
         }
-}
+};
 
 wp.autosave.local.init();
 
 }(jQuery));