X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/fa11948979fd6a4ea5705dc613b239699a459db3..fa6ee2c363cdfdebcb4b76e4d9c4347a4cb19065:/wp-includes/js/autosave.js

diff --git a/wp-includes/js/autosave.js b/wp-includes/js/autosave.js
index f339c949..4e6834a1 100644
--- a/wp-includes/js/autosave.js
+++ b/wp-includes/js/autosave.js
@@ -1,702 +1,591 @@
-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 || ! hasStorage ) {
+					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', 24 * 60 * 60 );
+				});
+			}
 
-		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' );
+
+				if ( cookie === post_id + '-saved' ) {
+					wpCookies.remove( 'wp-saving-post' );
+					// The post was saved properly, remove old data and bail
+					setData( false );
+					return;
+				}
 
-		compareString = wp.autosave.getCompareString( post_data );
+				if ( ! postData ) {
+					return;
+				}
 
-		// If the content, title and excerpt did not change since the last save, don't save again
-		if ( compareString == this.lastSavedData )
-			return false;
+				// There is a newer autosave. Don't show two "restore" notices at the same time.
+				if ( $( '#has-newer-autosave' ).length ) {
+					return;
+				}
 
-		post_data['save_time'] = (new Date()).getTime();
-		post_data['status'] = $('#post_status').val() || '';
-		result = this.setData( post_data );
+				content = $( '#content' ).val() || '';
+				post_title = $( '#title' ).val() || '';
+				excerpt = $( '#excerpt' ).val() || '';
 
-		if ( result )
-			this.lastSavedData = compareString;
+				if ( compare( content, postData.content ) && compare( post_title, postData.post_title ) &&
+					compare( excerpt, postData.excerpt ) ) {
 
-		return result;
-	},
+					return;
+				}
 
-	// Initialize and run checkPost() on loading the script (before TinyMCE init)
-	init: function( settings ) {
-		var self = this;
+				restorePostData = postData;
+				undoPostData = {
+					content: content,
+					post_title: post_title,
+					excerpt: excerpt
+				};
+
+				$notice = $( '#local-storage-notice' );
+				$('.wrap h2').first().after( $notice.addClass( 'notice-warning' ).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();
+						$notice.removeClass( 'notice-warning' ).addClass( 'notice-success' );
+					} else if ( $target.hasClass( 'undo-restore-backup' ) ) {
+						restorePost( undoPostData );
+						$target.parent().hide();
+						$(this).find( 'p.local-restore' ).show();
+						$notice.removeClass( 'notice-success' ).addClass( 'notice-warning' );
+					}
 
-		// Check if the browser supports sessionStorage and it's not disabled
-		if ( ! this.checkStorage() )
-			return;
+					event.preventDefault();
+				});
+			}
 
-		// Don't run if the post type supports neither 'editor' (textarea#content) nor 'excerpt'.
-		if ( ! $('#content').length && ! $('#excerpt').length )
-			return;
+			// Restore the current title, content and excerpt from postData.
+			function restorePost( postData ) {
+				var editor;
 
-		if ( settings )
-			$.extend( this, settings );
+				if ( postData ) {
+					// Set the last saved data
+					lastCompareString = getCompareString( postData );
 
-		if ( !this.blog_id )
-			this.blog_id = typeof window.autosaveL10n != 'undefined' ? window.autosaveL10n.blog_id : 0;
+					if ( $( '#title' ).val() !== postData.post_title ) {
+						$( '#title' ).focus().val( postData.post_title || '' );
+					}
 
-		$(document).ready( function(){ self.run(); } );
-	},
+					$( '#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 );
+					}
 
-	// Run on DOM ready
-	run: function() {
-		var self = this;
+					return true;
+				}
 
-		// Check if the local post data is different than the loaded post data.
-		this.checkPost();
+				return false;
+			}
 
-		// Set the schedule
-		this.schedule = $.schedule({
-			time: 15 * 1000,
-			func: function() { wp.autosave.local.save(); },
-			repeat: true,
-			protect: true
-		});
+			blog_id = typeof window.autosaveL10n !== 'undefined' && window.autosaveL10n.blog_id;
 
-		$('form#post').on('submit.autosave-local', function() {
-			var editor = typeof tinymce != 'undefined' && tinymce.get('content'), post_id = $('#post_ID').val() || 0;
+			// Check if the browser supports sessionStorage and it's not disabled,
+			// then initialize and run checkPost().
+			// Don't run if the post type supports neither 'editor' (textarea#content) nor 'excerpt'.
+			if ( checkStorage() && blog_id && ( $('#content').length || $('#excerpt').length ) ) {
+				$document.ready( run );
+			}
 
-			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() || ''
-				});
+			return {
+				hasStorage: hasStorage,
+				getSavedPostData: getSavedPostData,
+				save: save,
+				suspend: suspend,
+				resume: resume
+			};
+		}
+
+		// 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 );
 			}
 
-			wpCookies.set( 'wp-saving-post-' + post_id, 'check' );
-		});
-	},
+			function suspend() {
+				isSuspended = true;
+			}
 
-	// Strip whitespace and compare two strings
-	compare: function( str1, str2 ) {
-		function remove( string ) {
-			return string.toString().replace(/[\x20\t\r\n\f]+/g, '');
-		}
+			function resume() {
+				isSuspended = false;
+			}
+
+			// Runs on heartbeat-response
+			function response( data ) {
+				_schedule();
+				_blockSave = false;
+				lastCompareString = previousCompareString;
+				previousCompareString = '';
 
-		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;
+				$document.trigger( 'after-autosave', [data] );
+				enableButtons();
+
+				if ( data.success ) {
+					// No longer an auto-draft
+					$( '#auto_draft' ).val('');
+				}
 			}
-		}
 
-		// There is a newer autosave. Don't show two "restore" notices at the same time.
-		if ( $('#has-newer-autosave').length )
-			return;
+			/**
+			 * Save immediately
+			 *
+			 * Resets the timing and tells heartbeat to connect now
+			 *
+			 * @return void
+			 */
+			function triggerSave() {
+				nextRun = 0;
+				wp.heartbeat.connectNow();
+			}
 
-		content = $('#content').val() || '';
-		post_title = $('#title').val() || '';
-		excerpt = $('#excerpt').val() || '';
+			/**
+			 * 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;
+			}
 
-		if ( $('#wp-content-wrap').hasClass('tmce-active') && typeof switchEditors != 'undefined' )
-			content = switchEditors.pre_wpautop( content );
+			// Runs on 'heartbeat-send'
+			function save() {
+				var postData, compareString;
 
-		// 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;
-		}
+				// window.autosave() used for back-compat
+				if ( isSuspended || _blockSave || ! window.autosave() ) {
+					return false;
+				}
 
-		this.restore_post_data = post_data;
-		this.undo_post_data = {
-			content: content,
-			post_title: post_title,
-			excerpt: excerpt
-		};
+				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;
+				}
 
-		notice = $('#local-storage-notice');
-		$('.wrap h2').first().after( notice.addClass('updated').show() );
+				previousCompareString = compareString;
+				tempBlockSave();
+				disableButtons();
 
-		notice.on( 'click', function(e) {
-			var target = $( e.target );
+				$document.trigger( 'wpcountwords', [ postData.content ] )
+					.trigger( 'before-autosave', [ postData ] );
 
-			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();
+				postData._wpnonce = $( '#_wpnonce' ).val() || '';
+
+				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 ));