X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/76aea3697c6043c1613370f172395b4f65ee71f0..e0bf0ae6a149125bedfeaf344114a97d5864e74d:/wp-includes/js/autosave.js

diff --git a/wp-includes/js/autosave.js b/wp-includes/js/autosave.js
index ee0f3185..6cd6a47f 100644
--- a/wp-includes/js/autosave.js
+++ b/wp-includes/js/autosave.js
@@ -1,244 +1,702 @@
-var autosaveLast = '';
-var autosavePeriodical;
-var autosaveOldMessage = '';
-var autosaveDelayURL = null;
-var previewwin;
-
-jQuery(function($) {
-	autosaveLast = $('#post #title').val()+$('#post #content').val();
+var autosave, autosaveLast = '', autosavePeriodical, autosaveDelayPreview = false, notSaved = true, blockSave = false, fullscreen, autosaveLockRelease = true;
+
+jQuery(document).ready( function($) {
+
+	if ( $('#wp-content-wrap').hasClass('tmce-active') && typeof switchEditors != 'undefined' ) {
+		autosaveLast = wp.autosave.getCompareString({
+			post_title : $('#title').val() || '',
+			content : switchEditors.pre_wpautop( $('#content').val() ) || '',
+			excerpt : $('#excerpt').val() || ''
+		});
+	} else {
+		autosaveLast = wp.autosave.getCompareString();
+	}
+
 	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); });
-	
-	// Autosave when the preview button is clicked. 
-	$('#previewview a').click(function(e) {
-		autosave();
-		autosaveDelayURL = this.href;
-		previewwin = window.open('','_blank');
+	$("#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;
 
-		e.preventDefault();
+		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();
+			}
+
+			if ( compareString != autosaveLast )
+				return autosaveL10n.saveAlert;
+		}
+	};
+
+	$(window).unload( function(e) {
+		if ( ! autosaveLockRelease )
+			return;
+
+		// unload fires (twice) on removing the Thickbox iframe. Make sure we process only the main document unload.
+		if ( e.target && e.target.nodeName != '#document' )
+			return;
+
+		$.ajax({
+			type: 'POST',
+			url: ajaxurl,
+			async: false,
+			data: {
+				action: 'wp-remove-post-lock',
+				_wpnonce: $('#_wpnonce').val(),
+				post_ID: $('#post_ID').val(),
+				active_post_lock: $('#active_post_lock').val()
+			}
+		});
+	} );
+
+	// preview
+	$('#post-preview').click(function(){
+		if ( $('#auto_draft').val() == '1' && notSaved ) {
+			autosaveDelayPreview = true;
+			autosave();
+			return false;
+		}
+		doPreview();
 		return false;
 	});
+
+	doPreview = function() {
+		$('input#wp-preview').val('dopreview');
+		$('form#post').attr('target', 'wp-preview').submit().attr('target', '');
+
+		/*
+		 * Workaround for WebKit bug preventing a form submitting twice to the same action.
+		 * https://bugs.webkit.org/show_bug.cgi?id=28633
+		 */
+		var ua = navigator.userAgent.toLowerCase();
+		if ( ua.indexOf('safari') != -1 && ua.indexOf('chrome') == -1 ) {
+			$('form#post').attr('action', function(index, value) {
+				return value + '?t=' + new Date().getTime();
+			});
+		}
+
+		$('input#wp-preview').val('');
+	}
+
+	// This code is meant to allow tabbing from Title to Post content.
+	$('#title').on('keydown.editor-focus', function(e) {
+		var ed;
+
+		if ( e.which != 9 )
+			return;
+
+		if ( !e.ctrlKey && !e.altKey && !e.shiftKey ) {
+			if ( typeof(tinymce) != 'undefined' )
+				ed = tinymce.get('content');
+
+			if ( ed && !ed.isHidden() ) {
+				$(this).one('keyup', function(e){
+					$('#content_tbl td.mceToolbar > a').focus();
+				});
+			} else {
+				$('#content').focus();
+			}
+
+			e.preventDefault();
+		}
+	});
+
+	// autosave new posts after a title is typed but not if Publish or Save Draft is clicked
+	if ( '1' == $('#auto_draft').val() ) {
+		$('#title').blur( function() {
+			if ( !this.value || $('#auto_draft').val() != '1' )
+				return;
+			delayed_autosave();
+		});
+	}
+
+	// When connection is lost, keep user from submitting changes.
+	$(document).on('heartbeat-connection-lost.autosave', function( e, error ) {
+		if ( 'timeout' === error ) {
+			var notice = $('#lost-connection-notice');
+			if ( ! wp.autosave.local.hasStorage ) {
+				notice.find('.hide-if-no-sessionstorage').hide();
+			}
+			notice.show();
+			autosave_disable_buttons();
+		}
+	}).on('heartbeat-connection-restored.autosave', function() {
+		$('#lost-connection-notice').hide();
+		autosave_enable_buttons();
+	});
 });
 
-function autosave_parse_response(response) {
-	var res = wpAjax.parseAjaxResponse(response, 'autosave'); // parse the ajax response
-	var message = '';
+function autosave_parse_response( response ) {
+	var res = wpAjax.parseAjaxResponse(response, 'autosave'), post_id, sup;
 
 	if ( res && res.responses && res.responses.length ) {
-		message = res.responses[0].data; // The saved message or error.
-		// someone else is editing: disable autosave, set errors
 		if ( res.responses[0].supplemental ) {
-			if ( 'disable' == res.responses[0].supplemental['disable_autosave'] ) {
-				autosave = function() {};
-				res = { errors: true };
-			}
-			jQuery.each(res.responses[0].supplemental, function(selector, value) {
-				if ( selector.match(/^replace-/) ) {
-					jQuery('#'+selector.replace('replace-', '')).val(value);
-				}
+			sup = res.responses[0].supplemental;
+
+			jQuery.each( sup, function( selector, value ) {
+				if ( selector.match(/^replace-/) )
+					jQuery( '#' + selector.replace('replace-', '') ).val( value );
 			});
 		}
 
-		// if no errors: add preview link and slug UI
+		// if no errors: add slug UI and update autosave-message
 		if ( !res.errors ) {
-			var postID = parseInt( res.responses[0].id );
-			if ( !isNaN(postID) && postID > 0 ) {
-				autosave_update_preview_link(postID);
-				autosave_update_slug(postID);
-			}
+			if ( post_id = parseInt( res.responses[0].id, 10 ) )
+				autosave_update_slug( post_id );
+
+			if ( res.responses[0].data ) // update autosave message
+				jQuery('.autosave-message').text( res.responses[0].data );
 		}
 	}
-	if ( message ) { jQuery('#autosave').html(message); } // update autosave message
-	else if ( autosaveOldMessage && res ) { jQuery('#autosave').html( autosaveOldMessage ); }
+
 	return res;
 }
 
 // called when autosaving pre-existing post
 function autosave_saved(response) {
+	blockSave = false;
 	autosave_parse_response(response); // parse the ajax response
 	autosave_enable_buttons(); // re-enable disabled form buttons
 }
 
 // called when autosaving new post
 function autosave_saved_new(response) {
-	var res = autosave_parse_response(response); // parse the ajax response
-	// if no errors: update post_ID from the temporary value, grab new save-nonce for that new ID
+	blockSave = false;
+	var res = autosave_parse_response(response), post_id;
+
 	if ( res && res.responses.length && !res.errors ) {
-		var tempID = jQuery('#post_ID').val();
-		var postID = parseInt( res.responses[0].id );
-		autosave_update_post_ID( postID ); // disabled form buttons are re-enabled here
-		if ( tempID < 0 && postID > 0) // update media buttons
-			jQuery('#media-buttons a').each(function(){
-				this.href = this.href.replace(tempID, postID);
-			});
-	} else {
-		autosave_enable_buttons(); // re-enable disabled form buttons
-	}
-}
+		// An ID is sent only for real auto-saves, not for autosave=0 "keepalive" saves
+		post_id = parseInt( res.responses[0].id, 10 );
 
-function autosave_update_post_ID( postID ) {
-	if ( !isNaN(postID) && postID > 0 ) {
-		if ( postID == parseInt(jQuery('#post_ID').val()) ) { return; } // no need to do this more than once
-		jQuery('#post_ID').attr({name: "post_ID"});
-		jQuery('#post_ID').val(postID);
-		// We need new nonces
-		jQuery.post(autosaveL10n.requestFile, {
-			action: "autosave-generate-nonces",
-			post_ID: postID,
-			autosavenonce: jQuery('#autosavenonce').val(),
-			post_type: jQuery('#post_type').val()
-		}, function(html) {
-			jQuery('#_wpnonce').val(html);
-			autosave_enable_buttons(); // re-enable disabled form buttons
-		});
-		jQuery('#hiddenaction').val('editpost');
-	}
-}
+		if ( post_id ) {
+			notSaved = false;
+			jQuery('#auto_draft').val('0'); // No longer an auto-draft
+		}
 
-function autosave_update_preview_link(post_id) {
-	// Add preview button if not already there
-	if ( !jQuery('#previewview > *').size() ) {
-		var post_type = jQuery('#post_type').val();
-		var previewText = 'page' == post_type ? autosaveL10n.previewPageText : autosaveL10n.previewPostText;
-		jQuery.post(autosaveL10n.requestFile, {
-			action: "get-permalink",
-			post_id: post_id,
-			getpermalinknonce: jQuery('#getpermalinknonce').val()
-		}, function(permalink) {
-			jQuery('#previewview').html('<a target="_blank" href="'+permalink+'" tabindex="4">'+previewText+'</a>');
-
-			// Autosave when the preview button is clicked.  
-			jQuery('#previewview a').click(function(e) {
-				autosave();
-				autosaveDelayURL = this.href;
-				previewwin = window.open('','_blank');
-
-				e.preventDefault();
-				return false;
-			});
-		});
+		autosave_enable_buttons();
+
+		if ( autosaveDelayPreview ) {
+			autosaveDelayPreview = false;
+			doPreview();
+		}
+	} else {
+		autosave_enable_buttons(); // re-enable disabled form buttons
 	}
 }
 
 function autosave_update_slug(post_id) {
 	// create slug area only if not already there
-	if ( jQuery.isFunction(make_slugedit_clickable) && !jQuery('#edit-slug-box > *').size() ) {
-		jQuery.post(
-			slugL10n.requestFile,
-			{
+	if ( 'undefined' != makeSlugeditClickable && jQuery.isFunction(makeSlugeditClickable) && !jQuery('#edit-slug-box > *').size() ) {
+		jQuery.post( ajaxurl, {
 				action: 'sample-permalink',
 				post_id: post_id,
-				new_title: jQuery('#title').val(), 
+				new_title: fullscreen && fullscreen.settings.visible ? jQuery('#wp-fullscreen-title').val() : jQuery('#title').val(),
 				samplepermalinknonce: jQuery('#samplepermalinknonce').val()
 			},
 			function(data) {
-				jQuery('#edit-slug-box').html(data);
-				make_slugedit_clickable();
+				if ( data !== '-1' ) {
+					var box = jQuery('#edit-slug-box');
+					box.html(data);
+					if (box.hasClass('hidden')) {
+						box.fadeIn('fast', function () {
+							box.removeClass('hidden');
+						});
+					}
+					makeSlugeditClickable();
+				}
 			}
 		);
 	}
 }
 
 function autosave_loading() {
-	jQuery('#autosave').html(autosaveL10n.savingText);
+	jQuery('.autosave-message').html(autosaveL10n.savingText);
 }
 
 function autosave_enable_buttons() {
-	jQuery("#submitpost :button:disabled, #submitpost :submit:disabled").attr('disabled', '');
-	if ( autosaveDelayURL ) {
-		previewwin.location = autosaveDelayURL;
-		autosaveDelayURL = null;
+	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("#submitpost :button:enabled, #submitpost :submit:enabled").attr('disabled', 'disabled');
-	setTimeout(autosave_enable_buttons, 5000); // Re-enable 5 sec later.  Just gives autosave a head start to avoid collisions.
+	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 );
 }
 
-var autosave = function() {
-	// (bool) is rich editor enabled and active
-	var rich = (typeof tinyMCE != "undefined") && tinyMCE.activeEditor && !tinyMCE.activeEditor.isHidden();
-	var post_data = {
-		action: "autosave",
-		post_ID:  jQuery("#post_ID").val() || 0,
-		post_title: jQuery("#title").val() || "",
-		autosavenonce: jQuery('#autosavenonce').val(),
-		tags_input: jQuery("#tags-input").val() || "",
-		post_type: jQuery('#post_type').val() || "",
-		autosave: 1
-	};
+function delayed_autosave() {
+	setTimeout(function(){
+		if ( blockSave )
+			return;
+		autosave();
+	}, 200);
+}
+
+autosave = function() {
+	var post_data = wp.autosave.getPostData(),
+		compareString,
+		successCallback;
 
-	// We always send the ajax request in order to keep the post lock fresh.
-	// This (bool) tells whether or not to write the post to the DB during the ajax request.
-	var doAutoSave = true;
+	blockSave = true;
+
+	// post_data.content cannot be retrieved at the moment
+	if ( ! post_data.autosave )
+		return false;
 
 	// No autosave while thickbox is open (media buttons)
 	if ( jQuery("#TB_window").css('display') == 'block' )
-		doAutoSave = false;
-
-	/* Gotta do this up here so we can check the length when tinyMCE is in use */
-	if ( rich ) {		
-		var ed = tinyMCE.activeEditor;
-		if ( 'mce_fullscreen' == ed.id )
-			tinyMCE.get('content').setContent(ed.getContent({format : 'raw'}), {format : 'raw'});
-		tinyMCE.get('content').save();
-	}
-	
-	post_data["content"] = jQuery("#content").val();
-	if ( jQuery('#post_name').val() )
-		post_data["post_name"] = jQuery('#post_name').val();
+		return false;
 
-	// Nothing to save or no change.
-	if( (post_data["post_title"].length==0 && post_data["content"].length==0) || post_data["post_title"] + post_data["content"] == autosaveLast) {
-		doAutoSave = false
-	}
+	compareString = wp.autosave.getCompareString( post_data );
 
-	autosave_disable_buttons();
+	// Nothing to save or no change.
+	if ( compareString == autosaveLast )
+		return false;
 
-	var origStatus = jQuery('#original_post_status').val();
+	autosaveLast = compareString;
+	jQuery(document).triggerHandler('wpcountwords', [ post_data["content"] ]);
 
-	autosaveLast = jQuery("#title").val()+jQuery("#content").val();
-	goodcats = ([]);
-	jQuery("[@name='post_category[]']:checked").each( function(i) {
-		goodcats.push(this.value);
-	} );
-	post_data["catslist"] = goodcats.join(",");
-
-	if ( jQuery("#comment_status").attr("checked") )
-		post_data["comment_status"] = 'open';
-	if ( jQuery("#ping_status").attr("checked") )
-		post_data["ping_status"] = 'open';
-	if ( jQuery("#excerpt").size() )
-		post_data["excerpt"] = jQuery("#excerpt").val();
-	if ( jQuery("#post_author").size() )
-		post_data["post_author"] = jQuery("#post_author").val();
-
-	// Don't run while the TinyMCE spellcheck is on.  Why?  Who knows.
-	if ( rich && tinyMCE.activeEditor.plugins.spellchecker && tinyMCE.activeEditor.plugins.spellchecker.active ) {
-		doAutoSave = false;
-	}
+	// Disable buttons until we know the save completed.
+	autosave_disable_buttons();
 
-	if(parseInt(post_data["post_ID"]) < 1) {
-		post_data["temp_ID"] = post_data["post_ID"];
-		var successCallback = autosave_saved_new;; // new post
+	if ( post_data["auto_draft"] == '1' ) {
+		successCallback = autosave_saved_new; // new post
 	} else {
-		var successCallback = autosave_saved; // pre-existing post
+		successCallback = autosave_saved; // pre-existing post
 	}
 
-	if ( !doAutoSave ) {
-		post_data['autosave'] = 0;
-	}
-
-	autosaveOldMessage = jQuery('#autosave').html();
-
 	jQuery.ajax({
 		data: post_data,
-		beforeSend: doAutoSave ? autosave_loading : null,
+		beforeSend: autosave_loading,
 		type: "POST",
-		url: autosaveL10n.requestFile,
+		url: ajaxurl,
 		success: successCallback
 	});
+
+	return true;
 }
+
+// Autosave in localStorage
+// set as simple object/mixin for now
+window.wp = window.wp || {};
+wp.autosave = wp.autosave || {};
+
+(function($){
+// Returns the data for saving in both localStorage and autosaves to the server
+wp.autosave.getPostData = function() {
+	var ed = typeof tinymce != 'undefined' ? tinymce.activeEditor : null, post_name, parent_id, cats = [],
+		data = {
+			action: 'autosave',
+			autosave: true,
+			post_id: $('#post_ID').val() || 0,
+			autosavenonce: $('#autosavenonce').val() || '',
+			post_type: $('#post_type').val() || '',
+			post_author: $('#post_author').val() || '',
+			excerpt: $('#excerpt').val() || ''
+		};
+
+	if ( ed && !ed.isHidden() ) {
+		// Don't run while the tinymce spellcheck is on. It resets all found words.
+		if ( ed.plugins.spellchecker && ed.plugins.spellchecker.active ) {
+			data.autosave = false;
+			return data;
+		} else {
+			if ( 'mce_fullscreen' == ed.id )
+				tinymce.get('content').setContent(ed.getContent({format : 'raw'}), {format : 'raw'});
+
+			tinymce.triggerSave();
+		}
+	}
+
+	if ( typeof fullscreen != 'undefined' && fullscreen.settings.visible ) {
+		data['post_title'] = $('#wp-fullscreen-title').val() || '';
+		data['content'] = $('#wp_mce_fullscreen').val() || '';
+	} else {
+		data['post_title'] = $('#title').val() || '';
+		data['content'] = $('#content').val() || '';
+	}
+
+	/*
+	// We haven't been saving tags with autosave since 2.8... Start again?
+	$('.the-tags').each( function() {
+		data[this.name] = this.value;
+	});
+	*/
+
+	$('input[id^="in-category-"]:checked').each( function() {
+		cats.push(this.value);
+	});
+	data['catslist'] = cats.join(',');
+
+	if ( post_name = $('#post_name').val() )
+		data['post_name'] = post_name;
+
+	if ( parent_id = $('#parent_id').val() )
+		data['parent_id'] = parent_id;
+
+	if ( $('#comment_status').prop('checked') )
+		data['comment_status'] = 'open';
+
+	if ( $('#ping_status').prop('checked') )
+		data['ping_status'] = 'open';
+
+	if ( $('#auto_draft').val() == '1' )
+		data['auto_draft'] = '1';
+
+	return data;
+};
+
+// Concatenate title, content and excerpt. Used to track changes when auto-saving.
+wp.autosave.getCompareString = function( post_data ) {
+	if ( typeof post_data === 'object' ) {
+		return ( post_data.post_title || '' ) + '::' + ( post_data.content || '' ) + '::' + ( post_data.excerpt || '' );
+	}
+
+	return ( $('#title').val() || '' ) + '::' + ( $('#content').val() || '' ) + '::' + ( $('#excerpt').val() || '' );
+};
+
+wp.autosave.local = {
+
+	lastSavedData: '',
+	blog_id: 0,
+	hasStorage: false,
+
+	// Check if the browser supports sessionStorage and it's not disabled
+	checkStorage: function() {
+		var test = Math.random(), result = false;
+
+		try {
+			sessionStorage.setItem('wp-test', test);
+			result = sessionStorage.getItem('wp-test') == test;
+			sessionStorage.removeItem('wp-test');
+		} catch(e) {}
+
+		this.hasStorage = result;
+		return result;
+    },
+
+	/**
+	 * Initialize the local storage
+	 *
+	 * @return mixed False if no sessionStorage in the browser or an Object containing all post_data for this blog
+	 */
+	getStorage: function() {
+		var stored_obj = false;
+		// Separate local storage containers for each blog_id
+		if ( this.hasStorage && this.blog_id ) {
+			stored_obj = sessionStorage.getItem( 'wp-autosave-' + this.blog_id );
+
+			if ( stored_obj )
+				stored_obj = JSON.parse( stored_obj );
+			else
+				stored_obj = {};
+		}
+
+		return stored_obj;
+	},
+
+	/**
+	 * Set the storage for this blog
+	 *
+	 * Confirms that the data was saved successfully.
+	 *
+	 * @return bool
+	 */
+	setStorage: function( stored_obj ) {
+		var key;
+
+		if ( this.hasStorage && this.blog_id ) {
+			key = 'wp-autosave-' + this.blog_id;
+			sessionStorage.setItem( key, JSON.stringify( stored_obj ) );
+			return sessionStorage.getItem( key ) !== null;
+		}
+
+		return false;
+	},
+
+	/**
+	 * Get the saved post data for the current post
+	 *
+	 * @return mixed False if no storage or no data or the post_data as an Object
+	 */
+	getData: function() {
+		var stored = this.getStorage(), post_id = $('#post_ID').val();
+
+		if ( !stored || !post_id )
+			return false;
+
+		return stored[ 'post_' + post_id ] || false;
+	},
+
+	/**
+	 * Set (save or delete) post data in the storage.
+	 *
+	 * If stored_data evaluates to 'false' the storage key for the current post will be removed
+	 *
+	 * $param stored_data The post data to store or null/false/empty to delete the key
+	 * @return bool
+	 */
+	setData: function( stored_data ) {
+		var stored = this.getStorage(), post_id = $('#post_ID').val();
+
+		if ( !stored || !post_id )
+			return false;
+
+		if ( stored_data )
+			stored[ 'post_' + post_id ] = stored_data;
+		else if ( stored.hasOwnProperty( 'post_' + post_id ) )
+			delete stored[ 'post_' + post_id ];
+		else
+			return false;
+
+		return this.setStorage(stored);
+	},
+
+	/**
+	 * Save post data for the current post
+	 *
+	 * Runs on a 15 sec. schedule, saves when there are differences in the post title or content.
+	 * When the optional data is provided, updates the last saved post data.
+	 *
+	 * $param data optional Object The post data for saving, minimum 'post_title' and 'content'
+	 * @return bool
+	 */
+	save: function( data ) {
+		var result = false, post_data, compareString;
+
+		if ( ! data ) {
+			post_data = wp.autosave.getPostData();
+		} else {
+			post_data = this.getData() || {};
+			$.extend( post_data, data );
+			post_data.autosave = true;
+		}
+
+		// Cannot get the post data at the moment
+		if ( ! post_data.autosave )
+			return false;
+
+		compareString = wp.autosave.getCompareString( post_data );
+
+		// If the content, title and excerpt did not change since the last save, don't save again
+		if ( compareString == this.lastSavedData )
+			return false;
+
+		post_data['save_time'] = (new Date()).getTime();
+		post_data['status'] = $('#post_status').val() || '';
+		result = this.setData( post_data );
+
+		if ( result )
+			this.lastSavedData = compareString;
+
+		return result;
+	},
+
+	// Initialize and run checkPost() on loading the script (before TinyMCE init)
+	init: function( settings ) {
+		var self = this;
+
+		// Check if the browser supports sessionStorage and it's not disabled
+		if ( ! this.checkStorage() )
+			return;
+
+		// Don't run if the post type supports neither 'editor' (textarea#content) nor 'excerpt'.
+		if ( ! $('#content').length && ! $('#excerpt').length )
+			return;
+
+		if ( settings )
+			$.extend( this, settings );
+
+		if ( !this.blog_id )
+			this.blog_id = typeof window.autosaveL10n != 'undefined' ? window.autosaveL10n.blog_id : 0;
+
+		$(document).ready( function(){ self.run(); } );
+	},
+
+	// Run on DOM ready
+	run: function() {
+		var self = this;
+
+		// Check if the local post data is different than the loaded post data.
+		this.checkPost();
+
+		// Set the schedule
+		this.schedule = $.schedule({
+			time: 15 * 1000,
+			func: function() { wp.autosave.local.save(); },
+			repeat: true,
+			protect: true
+		});
+
+		$('form#post').on('submit.autosave-local', function() {
+			var editor = typeof tinymce != 'undefined' && tinymce.get('content'), post_id = $('#post_ID').val() || 0;
+
+			if ( editor && ! editor.isHidden() ) {
+				// Last onSubmit event in the editor, needs to run after the content has been moved to the textarea.
+				editor.onSubmit.add( function() {
+					wp.autosave.local.save({
+						post_title: $('#title').val() || '',
+						content: $('#content').val() || '',
+						excerpt: $('#excerpt').val() || ''
+					});
+				});
+			} else {
+				self.save({
+					post_title: $('#title').val() || '',
+					content: $('#content').val() || '',
+					excerpt: $('#excerpt').val() || ''
+				});
+			}
+
+			wpCookies.set( 'wp-saving-post-' + post_id, 'check' );
+		});
+	},
+
+	// Strip whitespace and compare two strings
+	compare: function( str1, str2 ) {
+		function remove( string ) {
+			return string.toString().replace(/[\x20\t\r\n\f]+/g, '');
+		}
+
+		return ( remove( str1 || '' ) == remove( str2 || '' ) );
+	},
+
+	/**
+	 * Check if the saved data for the current post (if any) is different than the loaded post data on the screen
+	 *
+	 * Shows a standard message letting the user restore the post data if different.
+	 *
+	 * @return void
+	 */
+	checkPost: function() {
+		var self = this, post_data = this.getData(), content, post_title, excerpt, notice,
+			post_id = $('#post_ID').val() || 0, cookie = wpCookies.get( 'wp-saving-post-' + post_id );
+
+		if ( ! post_data )
+			return;
+
+		if ( cookie ) {
+			wpCookies.remove( 'wp-saving-post-' + post_id );
+
+			if ( cookie == 'saved' ) {
+				// The post was saved properly, remove old data and bail
+				this.setData( false );
+				return;
+			}
+		}
+
+		// There is a newer autosave. Don't show two "restore" notices at the same time.
+		if ( $('#has-newer-autosave').length )
+			return;
+
+		content = $('#content').val() || '';
+		post_title = $('#title').val() || '';
+		excerpt = $('#excerpt').val() || '';
+
+		if ( $('#wp-content-wrap').hasClass('tmce-active') && typeof switchEditors != 'undefined' )
+			content = switchEditors.pre_wpautop( content );
+
+		// cookie == 'check' means the post was not saved properly, always show #local-storage-notice
+		if ( cookie != 'check' && this.compare( content, post_data.content ) && this.compare( post_title, post_data.post_title ) && this.compare( excerpt, post_data.excerpt ) ) {
+			return;
+		}
+
+		this.restore_post_data = post_data;
+		this.undo_post_data = {
+			content: content,
+			post_title: post_title,
+			excerpt: excerpt
+		};
+
+		notice = $('#local-storage-notice');
+		$('.wrap h2').first().after( notice.addClass('updated').show() );
+
+		notice.on( 'click', function(e) {
+			var target = $( e.target );
+
+			if ( target.hasClass('restore-backup') ) {
+				self.restorePost( self.restore_post_data );
+				target.parent().hide();
+				$(this).find('p.undo-restore').show();
+			} else if ( target.hasClass('undo-restore-backup') ) {
+				self.restorePost( self.undo_post_data );
+				target.parent().hide();
+				$(this).find('p.local-restore').show();
+			}
+
+			e.preventDefault();
+		});
+	},
+
+	// Restore the current title, content and excerpt from post_data.
+	restorePost: function( post_data ) {
+		var editor;
+
+		if ( post_data ) {
+			// Set the last saved data
+			this.lastSavedData = 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 );
+			}
+
+			return true;
+		}
+
+		return false;
+	}
+};
+
+wp.autosave.local.init();
+
+}(jQuery));