]> scripts.mit.edu Git - autoinstalls/wordpress.git/blobdiff - wp-includes/js/autosave.js
WordPress 3.9-scripts
[autoinstalls/wordpress.git] / wp-includes / js / autosave.js
index f339c949671e6b4c60cafb1b4c7400f4436e7dfe..def54298ebc05d03b997a3821b0c9f5f8d573ca9 100644 (file)
-var autosave, autosaveLast = '', autosavePeriodical, autosaveDelayPreview = false, notSaved = true, blockSave = false, fullscreen, autosaveLockRelease = true;
-
-jQuery(document).ready( function($) {
+/* global tinymce, wpCookies, autosaveL10n, switchEditors */
+// Back-compat
+window.autosave = function() {
+       return true;
+};
 
-       if ( $('#wp-content-wrap').hasClass('tmce-active') && typeof switchEditors != 'undefined' ) {
-               autosaveLast = wp.autosave.getCompareString({
-                       post_title : $('#title').val() || '',
-                       content : switchEditors.pre_wpautop( $('#content').val() ) || '',
-                       excerpt : $('#excerpt').val() || ''
-               });
-       } else {
-               autosaveLast = wp.autosave.getCompareString();
-       }
+( function( $, window ) {
+       function autosave() {
+               var initialCompareString,
+               lastTriggerSave = 0,
+               $document = $(document);
 
-       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 editor = typeof(tinymce) != 'undefined' ? tinymce.activeEditor : false, compareString;
-
-               if ( editor && ! editor.isHidden() ) {
-                       if ( editor.isDirty() )
-                               return autosaveL10n.saveAlert;
-               } else {
-                       if ( fullscreen && fullscreen.settings.visible ) {
-                               compareString = wp.autosave.getCompareString({
-                                       post_title: $('#wp-fullscreen-title').val() || '',
-                                       content: $('#wp_mce_fullscreen').val() || '',
-                                       excerpt: $('#excerpt').val() || ''
-                               });
-                       } else {
-                               compareString = wp.autosave.getCompareString();
+               /**
+                * Returns the data saved in both local and remote autosave
+                *
+                * @return object Object containing the post data
+                */
+               function getPostData( type ) {
+                       var post_name, parent_id, data,
+                               time = ( new Date() ).getTime(),
+                               cats = [],
+                               editor = typeof tinymce !== 'undefined' && tinymce.get('content');
+
+                       // Don't run editor.save() more often than every 3 sec.
+                       // It is resource intensive and might slow down typing in long posts on slow devices.
+                       if ( editor && ! editor.isHidden() && time - 3000 > lastTriggerSave ) {
+                               editor.save();
+                               lastTriggerSave = time;
                        }
 
-                       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()
+                       data = {
+                               post_id: $( '#post_ID' ).val() || 0,
+                               post_type: $( '#post_type' ).val() || '',
+                               post_author: $( '#post_author' ).val() || '',
+                               post_title: $( '#title' ).val() || '',
+                               content: $( '#content' ).val() || '',
+                               excerpt: $( '#excerpt' ).val() || ''
+                       };
+
+                       if ( type === 'local' ) {
+                               return data;
                        }
-               });
-       } );
-
-       // 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[id^="in-category-"]:checked' ).each( function() {
+                               cats.push( this.value );
                        });
-               }
+                       data.catslist = cats.join(',');
 
-               $('input#wp-preview').val('');
-       }
+                       if ( post_name = $( '#post_name' ).val() ) {
+                               data.post_name = post_name;
+                       }
 
-       // This code is meant to allow tabbing from Title to Post content.
-       $('#title').on('keydown.editor-focus', function(e) {
-               var ed;
+                       if ( parent_id = $( '#parent_id' ).val() ) {
+                               data.parent_id = parent_id;
+                       }
 
-               if ( e.which != 9 )
-                       return;
+                       if ( $( '#comment_status' ).prop( 'checked' ) ) {
+                               data.comment_status = 'open';
+                       }
 
-               if ( !e.ctrlKey && !e.altKey && !e.shiftKey ) {
-                       if ( typeof(tinymce) != 'undefined' )
-                               ed = tinymce.get('content');
+                       if ( $( '#ping_status' ).prop( 'checked' ) ) {
+                               data.ping_status = 'open';
+                       }
 
-                       if ( ed && !ed.isHidden() ) {
-                               $(this).one('keyup', function(e){
-                                       $('#content_tbl td.mceToolbar > a').focus();
-                               });
-                       } else {
-                               $('#content').focus();
+                       if ( $( '#auto_draft' ).val() === '1' ) {
+                               data.auto_draft = '1';
                        }
 
-                       e.preventDefault();
+                       return data;
                }
-       });
 
-       // 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, status ) {
-               if ( 'timeout' === error || 503 == status ) {
-                       var notice = $('#lost-connection-notice');
-                       if ( ! wp.autosave.local.hasStorage ) {
-                               notice.find('.hide-if-no-sessionstorage').hide();
+               // Concatenate title, content and excerpt. Used to track changes when auto-saving.
+               function getCompareString( postData ) {
+                       if ( typeof postData === 'object' ) {
+                               return ( postData.post_title || '' ) + '::' + ( postData.content || '' ) + '::' + ( postData.excerpt || '' );
                        }
-                       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 );
-                       });
+
+                       return ( $('#title').val() || '' ) + '::' + ( $('#content').val() || '' ) + '::' + ( $('#excerpt').val() || '' );
                }
 
-               // 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 );
+               function disableButtons() {
+                       $document.trigger('autosave-disable-buttons');
+                       // Re-enable 5 sec later. Just gives autosave a head start to avoid collisions.
+                       setTimeout( enableButtons, 5000 );
+               }
 
-                       if ( res.responses[0].data ) // update autosave message
-                               jQuery('.autosave-message').text( res.responses[0].data );
+               function enableButtons() {
+                       $document.trigger( 'autosave-enable-buttons' );
                }
-       }
 
-       return res;
-}
+               // Autosave in localStorage
+               function autosaveLocal() {
+                       var restorePostData, undoPostData, blog_id, post_id, hasStorage, intervalTimer,
+                               lastCompareString,
+                               isSuspended = false;
+
+                       // Check if the browser supports sessionStorage and it's not disabled
+                       function checkStorage() {
+                               var test = Math.random().toString(),
+                                       result = false;
+
+                               try {
+                                       window.sessionStorage.setItem( 'wp-test', test );
+                                       result = window.sessionStorage.getItem( 'wp-test' ) === test;
+                                       window.sessionStorage.removeItem( 'wp-test' );
+                               } catch(e) {}
+
+                               hasStorage = result;
+                               return result;
+                       }
 
-// 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
-}
+                       /**
+                        * Initialize the local storage
+                        *
+                        * @return mixed False if no sessionStorage in the browser or an Object containing all postData for this blog
+                        */
+                       function getStorage() {
+                               var stored_obj = false;
+                               // Separate local storage containers for each blog_id
+                               if ( hasStorage && blog_id ) {
+                                       stored_obj = sessionStorage.getItem( 'wp-autosave-' + blog_id );
+
+                                       if ( stored_obj ) {
+                                               stored_obj = JSON.parse( stored_obj );
+                                       } else {
+                                               stored_obj = {};
+                                       }
+                               }
 
-// called when autosaving new post
-function autosave_saved_new(response) {
-       blockSave = false;
-       var res = autosave_parse_response(response), post_id;
+                               return stored_obj;
+                       }
 
-       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 );
+                       /**
+                        * Set the storage for this blog
+                        *
+                        * Confirms that the data was saved successfully.
+                        *
+                        * @return bool
+                        */
+                       function setStorage( stored_obj ) {
+                               var key;
+
+                               if ( hasStorage && blog_id ) {
+                                       key = 'wp-autosave-' + blog_id;
+                                       sessionStorage.setItem( key, JSON.stringify( stored_obj ) );
+                                       return sessionStorage.getItem( key ) !== null;
+                               }
 
-               if ( post_id ) {
-                       notSaved = false;
-                       jQuery('#auto_draft').val('0'); // No longer an auto-draft
-               }
+                               return false;
+                       }
 
-               autosave_enable_buttons();
+                       /**
+                        * Get the saved post data for the current post
+                        *
+                        * @return mixed False if no storage or no data or the postData as an Object
+                        */
+                       function getSavedPostData() {
+                               var stored = getStorage();
 
-               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();
+                               if ( ! stored || ! post_id ) {
+                                       return false;
                                }
+
+                               return stored[ 'post_' + post_id ] || false;
                        }
-               );
-       }
-}
-
-function autosave_loading() {
-       jQuery('.autosave-message').html(autosaveL10n.savingText);
-}
-
-function autosave_enable_buttons() {
-       jQuery(document).trigger('autosave-enable-buttons');
-       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(),
-               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' )
-               return false;
-
-       compareString = wp.autosave.getCompareString( post_data );
-
-       // 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: autosave_loading,
-               type: "POST",
-               url: ajaxurl,
-               success: successCallback
-       });
+                       /**
+                        * 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
+                        */
+                       function setData( stored_data ) {
+                               var stored = getStorage();
+
+                               if ( ! stored || ! post_id ) {
+                                       return false;
+                               }
 
-       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 ( stored_data ) {
+                                       stored[ 'post_' + post_id ] = stored_data;
+                               } else if ( stored.hasOwnProperty( 'post_' + post_id ) ) {
+                                       delete stored[ 'post_' + post_id ];
+                               } else {
+                                       return false;
+                               }
 
-       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'});
+                               return setStorage( stored );
+                       }
 
-                       tinymce.triggerSave();
-               }
-       }
+                       function suspend() {
+                               isSuspended = true;
+                       }
 
-       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() || '';
-       }
+                       function resume() {
+                               isSuspended = false;
+                       }
 
-       /*
-       // We haven't been saving tags with autosave since 2.8... Start again?
-       $('.the-tags').each( function() {
-               data[this.name] = this.value;
-       });
-       */
+                       /**
+                        * Save post data for the current post
+                        *
+                        * Runs on a 15 sec. interval, 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
+                        */
+                       function save( data ) {
+                               var postData, compareString,
+                                       result = false;
+
+                               if ( isSuspended ) {
+                                       return false;
+                               }
 
-       $('input[id^="in-category-"]:checked').each( function() {
-               cats.push(this.value);
-       });
-       data['catslist'] = cats.join(',');
+                               if ( data ) {
+                                       postData = getSavedPostData() || {};
+                                       $.extend( postData, data );
+                               } else {
+                                       postData = getPostData('local');
+                               }
 
-       if ( post_name = $('#post_name').val() )
-               data['post_name'] = post_name;
+                               compareString = getCompareString( postData );
 
-       if ( parent_id = $('#parent_id').val() )
-               data['parent_id'] = parent_id;
+                               if ( typeof lastCompareString === 'undefined' ) {
+                                       lastCompareString = initialCompareString;
+                               }
 
-       if ( $('#comment_status').prop('checked') )
-               data['comment_status'] = 'open';
+                               // If the content, title and excerpt did not change since the last save, don't save again
+                               if ( compareString === lastCompareString ) {
+                                       return false;
+                               }
 
-       if ( $('#ping_status').prop('checked') )
-               data['ping_status'] = 'open';
+                               postData.save_time = ( new Date() ).getTime();
+                               postData.status = $( '#post_status' ).val() || '';
+                               result = setData( postData );
 
-       if ( $('#auto_draft').val() == '1' )
-               data['auto_draft'] = '1';
+                               if ( result ) {
+                                       lastCompareString = compareString;
+                               }
 
-       return data;
-};
+                               return result;
+                       }
 
-// Concatenate title, content and excerpt. Used to track changes when auto-saving.
-wp.autosave.getCompareString = function( post_data ) {
-       if ( typeof post_data === 'object' ) {
-               return ( post_data.post_title || '' ) + '::' + ( post_data.content || '' ) + '::' + ( post_data.excerpt || '' );
-       }
+                       // Run on DOM ready
+                       function run() {
+                               post_id = $('#post_ID').val() || 0;
+
+                               // Check if the local post data is different than the loaded post data.
+                               if ( $( '#wp-content-wrap' ).hasClass( 'tmce-active' ) ) {
+                                       // If TinyMCE loads first, check the post 1.5 sec. after it is ready.
+                                       // By this time the content has been loaded in the editor and 'saved' to the textarea.
+                                       // This prevents false positives.
+                                       $document.on( 'tinymce-editor-init.autosave', function() {
+                                               window.setTimeout( function() {
+                                                       checkPost();
+                                               }, 1500 );
+                                       });
+                               } else {
+                                       checkPost();
+                               }
 
-       return ( $('#title').val() || '' ) + '::' + ( $('#content').val() || '' ) + '::' + ( $('#excerpt').val() || '' );
-};
+                               // Save every 15 sec.
+                               intervalTimer = window.setInterval( save, 15000 );
+
+                               $( '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.on( 'submit', function() {
+                                                       save({
+                                                               post_title: $( '#title' ).val() || '',
+                                                               content: $( '#content' ).val() || '',
+                                                               excerpt: $( '#excerpt' ).val() || ''
+                                                       });
+                                               });
+                                       } else {
+                                               save({
+                                                       post_title: $( '#title' ).val() || '',
+                                                       content: $( '#content' ).val() || '',
+                                                       excerpt: $( '#excerpt' ).val() || ''
+                                               });
+                                       }
 
-wp.autosave.local = {
-
-       lastSavedData: '',
-       blog_id: 0,
-       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 = {};
-               }
+                                       wpCookies.set( 'wp-saving-post-' + post_id, 'check' );
+                               });
+                       }
 
-               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;
-               }
+                       // Strip whitespace and compare two strings
+                       function compare( str1, str2 ) {
+                               function removeSpaces( string ) {
+                                       return string.toString().replace(/[\x20\t\r\n\f]+/g, '');
+                               }
 
-               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, post_data, compareString;
-
-               if ( ! data ) {
-                       post_data = wp.autosave.getPostData();
-               } else {
-                       post_data = this.getData() || {};
-                       $.extend( post_data, data );
-                       post_data.autosave = true;
-               }
+                               return ( removeSpaces( str1 || '' ) === removeSpaces( str2 || '' ) );
+                       }
 
-               // Cannot get the post data at the moment
-               if ( ! post_data.autosave )
-                       return false;
+                       /**
+                        * 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
+                        */
+                       function checkPost() {
+                               var content, post_title, excerpt, $notice,
+                                       postData = getSavedPostData(),
+                                       cookie = wpCookies.get( 'wp-saving-post-' + post_id );
+
+                               if ( ! postData ) {
+                                       return;
+                               }
 
-               compareString = wp.autosave.getCompareString( post_data );
+                               if ( cookie ) {
+                                       wpCookies.remove( 'wp-saving-post-' + post_id );
 
-               // If the content, title and excerpt did not change since the last save, don't save again
-               if ( compareString == this.lastSavedData )
-                       return false;
+                                       if ( cookie === 'saved' ) {
+                                               // The post was saved properly, remove old data and bail
+                                               setData( false );
+                                               return;
+                                       }
+                               }
 
-               post_data['save_time'] = (new Date()).getTime();
-               post_data['status'] = $('#post_status').val() || '';
-               result = this.setData( post_data );
+                               // There is a newer autosave. Don't show two "restore" notices at the same time.
+                               if ( $( '#has-newer-autosave' ).length ) {
+                                       return;
+                               }
 
-               if ( result )
-                       this.lastSavedData = compareString;
+                               content = $( '#content' ).val() || '';
+                               post_title = $( '#title' ).val() || '';
+                               excerpt = $( '#excerpt' ).val() || '';
 
-               return result;
-       },
+                               // cookie == 'check' means the post was not saved properly, always show #local-storage-notice
+                               if ( cookie !== 'check' && compare( content, postData.content ) &&
+                                       compare( post_title, postData.post_title ) && compare( excerpt, postData.excerpt ) ) {
 
-       // Initialize and run checkPost() on loading the script (before TinyMCE init)
-       init: function( settings ) {
-               var self = this;
+                                       return;
+                               }
 
-               // Check if the browser supports sessionStorage and it's not disabled
-               if ( ! this.checkStorage() )
-                       return;
+                               restorePostData = postData;
+                               undoPostData = {
+                                       content: content,
+                                       post_title: post_title,
+                                       excerpt: excerpt
+                               };
+
+                               $notice = $( '#local-storage-notice' );
+                               $('.wrap h2').first().after( $notice.addClass( 'updated' ).show() );
+
+                               $notice.on( 'click.autosave-local', function( event ) {
+                                       var $target = $( event.target );
+
+                                       if ( $target.hasClass( 'restore-backup' ) ) {
+                                               restorePost( restorePostData );
+                                               $target.parent().hide();
+                                               $(this).find( 'p.undo-restore' ).show();
+                                       } else if ( $target.hasClass( 'undo-restore-backup' ) ) {
+                                               restorePost( undoPostData );
+                                               $target.parent().hide();
+                                               $(this).find( 'p.local-restore' ).show();
+                                       }
 
-               // Don't run if the post type supports neither 'editor' (textarea#content) nor 'excerpt'.
-               if ( ! $('#content').length && ! $('#excerpt').length )
-                       return;
+                                       event.preventDefault();
+                               });
+                       }
 
-               if ( settings )
-                       $.extend( this, settings );
+                       // Restore the current title, content and excerpt from postData.
+                       function restorePost( postData ) {
+                               var editor;
 
-               if ( !this.blog_id )
-                       this.blog_id = typeof window.autosaveL10n != 'undefined' ? window.autosaveL10n.blog_id : 0;
+                               if ( postData ) {
+                                       // Set the last saved data
+                                       lastCompareString = getCompareString( postData );
 
-               $(document).ready( function(){ self.run(); } );
-       },
+                                       if ( $( '#title' ).val() !== postData.post_title ) {
+                                               $( '#title' ).focus().val( postData.post_title || '' );
+                                       }
 
-       // Run on DOM ready
-       run: function() {
-               var self = this;
+                                       $( '#excerpt' ).val( postData.excerpt || '' );
+                                       editor = typeof tinymce !== 'undefined' && tinymce.get('content');
+
+                                       if ( editor && ! editor.isHidden() && typeof switchEditors !== 'undefined' ) {
+                                               // Make sure there's an undo level in the editor
+                                               editor.undoManager.add();
+                                               editor.setContent( postData.content ? switchEditors.wpautop( postData.content ) : '' );
+                                       } else {
+                                               // Make sure the Text editor is selected
+                                               $( '#content-html' ).click();
+                                               $( '#content' ).val( postData.content );
+                                       }
 
-               // Check if the local post data is different than the loaded post data.
-               this.checkPost();
+                                       return true;
+                               }
 
-               // Set the schedule
-               this.schedule = $.schedule({
-                       time: 15 * 1000,
-                       func: function() { wp.autosave.local.save(); },
-                       repeat: true,
-                       protect: true
-               });
+                               return false;
+                       }
 
-               $('form#post').on('submit.autosave-local', function() {
-                       var editor = typeof tinymce != 'undefined' && tinymce.get('content'), post_id = $('#post_ID').val() || 0;
+                       // Initialize and run checkPost() on loading the script (before TinyMCE init)
+                       blog_id = typeof window.autosaveL10n !== 'undefined' && window.autosaveL10n.blog_id;
 
-                       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() || ''
-                               });
+                       // Check if the browser supports sessionStorage and it's not disabled
+                       if ( ! checkStorage() ) {
+                               return;
                        }
 
-                       wpCookies.set( 'wp-saving-post-' + post_id, 'check' );
-               });
-       },
+                       // Don't run if the post type supports neither 'editor' (textarea#content) nor 'excerpt'.
+                       if ( ! blog_id || ( ! $('#content').length && ! $('#excerpt').length ) ) {
+                               return;
+                       }
+
+                       $document.ready( run );
 
-       // Strip whitespace and compare two strings
-       compare: function( str1, str2 ) {
-               function remove( string ) {
-                       return string.toString().replace(/[\x20\t\r\n\f]+/g, '');
+                       return {
+                               hasStorage: hasStorage,
+                               getSavedPostData: getSavedPostData,
+                               save: save,
+                               suspend: suspend,
+                               resume: resume
+                       };
                }
 
-               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, 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;
+               // Autosave on the server
+               function autosaveServer() {
+                       var _blockSave, _blockSaveTimer, previousCompareString, lastCompareString,
+                               nextRun = 0,
+                               isSuspended = false;
+
+                       // Block saving for the next 10 sec.
+                       function tempBlockSave() {
+                               _blockSave = true;
+                               window.clearTimeout( _blockSaveTimer );
+
+                               _blockSaveTimer = window.setTimeout( function() {
+                                       _blockSave = false;
+                               }, 10000 );
                        }
-               }
 
-               // There is a newer autosave. Don't show two "restore" notices at the same time.
-               if ( $('#has-newer-autosave').length )
-                       return;
+                       function suspend() {
+                               isSuspended = true;
+                       }
 
-               content = $('#content').val() || '';
-               post_title = $('#title').val() || '';
-               excerpt = $('#excerpt').val() || '';
+                       function resume() {
+                               isSuspended = false;
+                       }
 
-               if ( $('#wp-content-wrap').hasClass('tmce-active') && typeof switchEditors != 'undefined' )
-                       content = switchEditors.pre_wpautop( content );
+                       // Runs on heartbeat-response
+                       function response( data ) {
+                               _schedule();
+                               _blockSave = false;
+                               lastCompareString = previousCompareString;
+                               previousCompareString = '';
 
-               // 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;
-               }
+                               $document.trigger( 'after-autosave', [data] );
+                               enableButtons();
 
-               this.restore_post_data = post_data;
-               this.undo_post_data = {
-                       content: content,
-                       post_title: post_title,
-                       excerpt: excerpt
-               };
+                               if ( data.success ) {
+                                       // No longer an auto-draft
+                                       $( '#auto_draft' ).val('');
+                               }
+                       }
+
+                       /**
+                        * Save immediately
+                        *
+                        * Resets the timing and tells heartbeat to connect now
+                        *
+                        * @return void
+                        */
+                       function triggerSave() {
+                               nextRun = 0;
+                               wp.heartbeat.connectNow();
+                       }
+
+                       /**
+                        * Checks if the post content in the textarea has changed since page load.
+                        *
+                        * This also happens when TinyMCE is active and editor.save() is triggered by
+                        * wp.autosave.getPostData().
+                        *
+                        * @return bool
+                        */
+                       function postChanged() {
+                               return getCompareString() !== initialCompareString;
+                       }
+
+                       // Runs on 'heartbeat-send'
+                       function save() {
+                               var postData, compareString;
+
+                               // window.autosave() used for back-compat
+                               if ( isSuspended || _blockSave || ! window.autosave() ) {
+                                       return false;
+                               }
+
+                               if ( ( new Date() ).getTime() < nextRun ) {
+                                       return false;
+                               }
+
+                               postData = getPostData();
+                               compareString = getCompareString( postData );
+
+                               // First check
+                               if ( typeof lastCompareString === 'undefined' ) {
+                                       lastCompareString = initialCompareString;
+                               }
+
+                               // No change
+                               if ( compareString === lastCompareString ) {
+                                       return false;
+                               }
+
+                               previousCompareString = compareString;
+                               tempBlockSave();
+                               disableButtons();
 
-               notice = $('#local-storage-notice');
-               $('.wrap h2').first().after( notice.addClass('updated').show() );
+                               $document.trigger( 'wpcountwords', [ postData.content ] )
+                                       .trigger( 'before-autosave', [ postData ] );
 
-               notice.on( 'click', function(e) {
-                       var target = $( e.target );
+                               postData._wpnonce = $( '#_wpnonce' ).val() || '';
 
-                       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();
+                               return postData;
                        }
 
-                       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 = wp.autosave.getCompareString( 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() && 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 );
+                       function _schedule() {
+                               nextRun = ( new Date() ).getTime() + ( autosaveL10n.autosaveInterval * 1000 ) || 60000;
                        }
 
-                       return true;
+                       $document.on( 'heartbeat-send.autosave', function( event, data ) {
+                               var autosaveData = save();
+
+                               if ( autosaveData ) {
+                                       data.wp_autosave = autosaveData;
+                               }
+                       }).on( 'heartbeat-tick.autosave', function( event, data ) {
+                               if ( data.wp_autosave ) {
+                                       response( data.wp_autosave );
+                               }
+                       }).on( 'heartbeat-connection-lost.autosave', function( event, error, status ) {
+                               // When connection is lost, keep user from submitting changes.
+                               if ( 'timeout' === error || 603 === status ) {
+                                       var $notice = $('#lost-connection-notice');
+
+                                       if ( ! wp.autosave.local.hasStorage ) {
+                                               $notice.find('.hide-if-no-sessionstorage').hide();
+                                       }
+
+                                       $notice.show();
+                                       disableButtons();
+                               }
+                       }).on( 'heartbeat-connection-restored.autosave', function() {
+                               $('#lost-connection-notice').hide();
+                               enableButtons();
+                       }).ready( function() {
+                               _schedule();
+                       });
+
+                       return {
+                               tempBlockSave: tempBlockSave,
+                               triggerSave: triggerSave,
+                               postChanged: postChanged,
+                               suspend: suspend,
+                               resume: resume
+                       };
                }
 
-               return false;
+               // Wait for TinyMCE to initialize plus 1 sec. for any external css to finish loading,
+               // then 'save' to the textarea before setting initialCompareString.
+               // This avoids any insignificant differences between the initial textarea content and the content
+               // extracted from the editor.
+               $document.on( 'tinymce-editor-init.autosave', function( event, editor ) {
+                       if ( editor.id === 'content' ) {
+                               window.setTimeout( function() {
+                                       editor.save();
+                                       initialCompareString = getCompareString();
+                               }, 1000 );
+                       }
+               }).ready( function() {
+                       // Set the initial compare string in case TinyMCE is not used or not loaded first
+                       initialCompareString = getCompareString();
+               });
+
+               return {
+                       getPostData: getPostData,
+                       getCompareString: getCompareString,
+                       disableButtons: disableButtons,
+                       enableButtons: enableButtons,
+                       local: autosaveLocal(),
+                       server: autosaveServer()
+               };
        }
-};
 
-wp.autosave.local.init();
+       window.wp = window.wp || {};
+       window.wp.autosave = autosave();
 
-}(jQuery));
+}( jQuery, window ));