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msd2/wordpress/wp-includes/js/autosave.js

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+/**
+ * @output wp-includes/js/autosave.js
+ */
+
+/* global tinymce, wpCookies, autosaveL10n, switchEditors */
+// Back-compat
+window.autosave = function() {
+	return true;
+};
+
+/**
+ * Adds autosave to the window object on dom ready.
+ *
+ * @since 3.9.0
+ *
+ * @param {jQuery} $ jQuery object.
+ * @param {window} The window object.
+ *
+ */
+( function( $, window ) {
+	/**
+	 * Auto saves the post.
+	 *
+	 * @since 3.9.0
+	 *
+	 * @returns {Object}
+	 * 	{{
+	 * 		getPostData: getPostData,
+	 * 		getCompareString: getCompareString,
+	 * 		disableButtons: disableButtons,
+	 * 		enableButtons: enableButtons,
+	 * 		local: ({hasStorage, getSavedPostData, save, suspend, resume}|*),
+	 * 		server: ({tempBlockSave, triggerSave, postChanged, suspend, resume}|*)}
+	 * 	}
+	 * 	The object with all functions for autosave.
+	 */
+	function autosave() {
+		var initialCompareString,
+			lastTriggerSave = 0,
+			$document = $(document);
+
+		/**
+		 * Returns the data saved in both local and remote autosave.
+		 *
+		 * @since 3.9.0
+		 *
+		 * @param {string} type The type of autosave either local or remote.
+		 *
+		 * @returns {Object} Object containing the post data.
+		 */
+		function getPostData( type ) {
+			var post_name, parent_id, data,
+				time = ( new Date() ).getTime(),
+				cats = [],
+				editor = getEditor();
+
+			// Don't run editor.save() more often than every 3 seconds.
+			// It is resource intensive and might slow down typing in long posts on slow devices.
+			if ( editor && editor.isDirty() && ! editor.isHidden() && time - 3000 > lastTriggerSave ) {
+				editor.save();
+				lastTriggerSave = time;
+			}
+
+			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;
+			}
+
+			$( '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;
+		}
+
+		/**
+		 * Concatenates the title, content and excerpt. This is used to track changes
+		 * when auto-saving.
+		 *
+		 * @since 3.9.0
+		 *
+		 * @param {Object} postData The object containing the post data.
+		 *
+		 * @returns {string} A concatenated string with title, content and excerpt.
+		 */
+		function getCompareString( postData ) {
+			if ( typeof postData === 'object' ) {
+				return ( postData.post_title || '' ) + '::' + ( postData.content || '' ) + '::' + ( postData.excerpt || '' );
+			}
+
+			return ( $('#title').val() || '' ) + '::' + ( $('#content').val() || '' ) + '::' + ( $('#excerpt').val() || '' );
+		}
+
+		/**
+		 * Disables save buttons.
+		 *
+		 * @since 3.9.0
+		 *
+		 * @returns {void}
+		 */
+		function disableButtons() {
+			$document.trigger('autosave-disable-buttons');
+
+			// Re-enable 5 sec later. Just gives autosave a head start to avoid collisions.
+			setTimeout( enableButtons, 5000 );
+		}
+
+		/**
+		 * Enables save buttons.
+		 *
+		 * @since 3.9.0
+		 *
+		 * @returns {void}
+		 */
+		function enableButtons() {
+			$document.trigger( 'autosave-enable-buttons' );
+		}
+
+		/**
+		 * Gets the content editor.
+		 *
+		 * @since 4.6.0
+		 *
+		 * @returns {boolean|*} Returns either false if the editor is undefined,
+		 * 						or the instance of the content editor.
+		 */
+		function getEditor() {
+			return typeof tinymce !== 'undefined' && tinymce.get('content');
+		}
+
+		/**
+		 * Autosave in localStorage.
+		 *
+		 * @since 3.9.0
+		 *
+		 * @returns {
+		 * {
+		 * 	hasStorage: *,
+		 * 	getSavedPostData: getSavedPostData,
+		 * 	save: save,
+		 * 	suspend: suspend,
+		 * 	resume: resume
+		 * 	}
+		 * }
+		 * The object with all functions for local storage autosave.
+		 */
+		function autosaveLocal() {
+			var blog_id, post_id, hasStorage, intervalTimer,
+				lastCompareString,
+				isSuspended = false;
+
+			/**
+			 * Checks if the browser supports sessionStorage and it's not disabled.
+			 *
+			 * @since 3.9.0
+			 *
+			 * @returns {boolean} True if the sessionStorage is supported and enabled.
+			 */
+			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;
+			}
+
+			/**
+			 * Initializes the local storage.
+			 *
+			 * @since 3.9.0
+			 *
+			 * @returns {boolean|Object} 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 = {};
+					}
+				}
+
+				return stored_obj;
+			}
+
+			/**
+			 * Sets the storage for this blog. Confirms that the data was saved
+			 * successfully.
+			 *
+			 * @since 3.9.0
+			 *
+			 * @returns {boolean} True if the data was saved successfully, false if it wasn't saved.
+			 */
+			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;
+				}
+
+				return false;
+			}
+
+			/**
+			 * Gets the saved post data for the current post.
+			 *
+			 * @since 3.9.0
+			 *
+			 * @returns {boolean|Object} False if no storage or no data or the postData as an Object.
+			 */
+			function getSavedPostData() {
+				var stored = getStorage();
+
+				if ( ! stored || ! post_id ) {
+					return false;
+				}
+
+				return stored[ 'post_' + post_id ] || false;
+			}
+
+			/**
+			 * Sets (save or delete) post data in the storage.
+			 *
+			 * If stored_data evaluates to 'false' the storage key for the current post will be removed.
+			 *
+			 * @since 3.9.0
+			 *
+			 * @param {Object|boolean|null} stored_data The post data to store or null/false/empty to delete the key.
+			 *
+			 * @returns {boolean} True if data is stored, false if data was removed.
+			 */
+			function setData( stored_data ) {
+				var stored = getStorage();
+
+				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 setStorage( stored );
+			}
+
+			/**
+			 * Sets isSuspended to true.
+			 *
+			 * @since 3.9.0
+			 *
+			 * @returns {void}
+			 */
+			function suspend() {
+				isSuspended = true;
+			}
+
+			/**
+			 * Sets isSuspended to false.
+			 *
+			 * @since 3.9.0
+			 *
+			 * @returns {void}
+			 */
+			function resume() {
+				isSuspended = false;
+			}
+
+			/**
+			 * Saves 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.
+			 *
+			 * @since 3.9.0
+			 *
+			 * @param {Object} data The post data for saving, minimum 'post_title' and 'content'.
+			 *
+			 * @returns {boolean} Returns true when data has been saved, otherwise it returns false.
+			 */
+			function save( data ) {
+				var postData, compareString,
+					result = false;
+
+				if ( isSuspended || ! hasStorage ) {
+					return false;
+				}
+
+				if ( data ) {
+					postData = getSavedPostData() || {};
+					$.extend( postData, data );
+				} else {
+					postData = getPostData('local');
+				}
+
+				compareString = getCompareString( postData );
+
+				if ( typeof lastCompareString === 'undefined' ) {
+					lastCompareString = initialCompareString;
+				}
+
+				// If the content, title and excerpt did not change since the last save, don't save again.
+				if ( compareString === lastCompareString ) {
+					return false;
+				}
+
+				postData.save_time = ( new Date() ).getTime();
+				postData.status = $( '#post_status' ).val() || '';
+				result = setData( postData );
+
+				if ( result ) {
+					lastCompareString = compareString;
+				}
+
+				return result;
+			}
+
+			/**
+			 * Initializes the auto save function.
+			 *
+			 * Checks whether the editor is active or not to use the editor events
+			 * to autosave, or uses the values from the elements to autosave.
+			 *
+			 * Runs on DOM ready.
+			 *
+			 * @since 3.9.0
+			 *
+			 * @returns {void}
+			 */
+			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();
+				}
+
+				// Save every 15 sec.
+				intervalTimer = window.setInterval( save, 15000 );
+
+				$( 'form#post' ).on( 'submit.autosave-local', function() {
+					var editor = getEditor(),
+						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() || ''
+						});
+					}
+
+					var secure = ( 'https:' === window.location.protocol );
+					wpCookies.set( 'wp-saving-post', post_id + '-check', 24 * 60 * 60, false, false, secure );
+				});
+			}
+
+			/**
+			 * Compares 2 strings. Removes whitespaces in the strings before comparing them.
+			 *
+			 * @since 3.9.0
+			 *
+			 * @param {string} str1 The first string.
+			 * @param {string} str2 The second string.
+			 * @returns {boolean} True if the strings are the same.
+			 */
+			function compare( str1, str2 ) {
+				function removeSpaces( string ) {
+					return string.toString().replace(/[\x20\t\r\n\f]+/g, '');
+				}
+
+				return ( removeSpaces( str1 || '' ) === removeSpaces( str2 || '' ) );
+			}
+
+			/**
+			 * Checks 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.
+			 *
+			 * @since 3.9.0
+			 *
+			 * @returns {void}
+			 */
+			function checkPost() {
+				var content, post_title, excerpt, $notice,
+					postData = getSavedPostData(),
+					cookie = wpCookies.get( 'wp-saving-post' ),
+					$newerAutosaveNotice = $( '#has-newer-autosave' ).parent( '.notice' ),
+					$headerEnd = $( '.wp-header-end' );
+
+				if ( cookie === post_id + '-saved' ) {
+					wpCookies.remove( 'wp-saving-post' );
+					// The post was saved properly, remove old data and bail
+					setData( false );
+					return;
+				}
+
+				if ( ! postData ) {
+					return;
+				}
+
+				content = $( '#content' ).val() || '';
+				post_title = $( '#title' ).val() || '';
+				excerpt = $( '#excerpt' ).val() || '';
+
+				if ( compare( content, postData.content ) && compare( post_title, postData.post_title ) &&
+					compare( excerpt, postData.excerpt ) ) {
+
+					return;
+				}
+
+				/*
+				 * If '.wp-header-end' is found, append the notices after it otherwise
+				 * after the first h1 or h2 heading found within the main content.
+				 */
+				if ( ! $headerEnd.length ) {
+					$headerEnd = $( '.wrap h1, .wrap h2' ).first();
+				}
+
+				$notice = $( '#local-storage-notice' )
+					.insertAfter( $headerEnd )
+					.addClass( 'notice-warning' );
+
+				if ( $newerAutosaveNotice.length ) {
+
+					// If there is a "server" autosave notice, hide it.
+					// The data in the session storage is either the same or newer.
+					$newerAutosaveNotice.slideUp( 150, function() {
+						$notice.slideDown( 150 );
+					});
+				} else {
+					$notice.slideDown( 200 );
+				}
+
+				$notice.find( '.restore-backup' ).on( 'click.autosave-local', function() {
+					restorePost( postData );
+					$notice.fadeTo( 250, 0, function() {
+						$notice.slideUp( 150 );
+					});
+				});
+			}
+
+			/**
+			 * Restores the current title, content and excerpt from postData.
+			 *
+			 * @since 3.9.0
+			 *
+			 * @param {Object} postData The object containing all post data.
+			 *
+			 * @returns {boolean} True if the post is restored.
+			 */
+			function restorePost( postData ) {
+				var editor;
+
+				if ( postData ) {
+					// Set the last saved data
+					lastCompareString = getCompareString( postData );
+
+					if ( $( '#title' ).val() !== postData.post_title ) {
+						$( '#title' ).focus().val( postData.post_title || '' );
+					}
+
+					$( '#excerpt' ).val( postData.excerpt || '' );
+					editor = getEditor();
+
+					if ( editor && ! editor.isHidden() && typeof switchEditors !== 'undefined' ) {
+						if ( editor.settings.wpautop && postData.content ) {
+							postData.content = switchEditors.wpautop( postData.content );
+						}
+
+						// Make sure there's an undo level in the editor
+						editor.undoManager.transact( function() {
+							editor.setContent( postData.content || '' );
+							editor.nodeChanged();
+						});
+					} else {
+
+						// Make sure the Text editor is selected
+						$( '#content-html' ).click();
+						$( '#content' ).focus();
+
+						// Using document.execCommand() will let the user undo.
+						document.execCommand( 'selectAll' );
+						document.execCommand( 'insertText', false, postData.content || '' );
+					}
+
+					return true;
+				}
+
+				return false;
+			}
+
+			blog_id = typeof window.autosaveL10n !== 'undefined' && window.autosaveL10n.blog_id;
+
+			// 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 );
+			}
+
+			return {
+				hasStorage: hasStorage,
+				getSavedPostData: getSavedPostData,
+				save: save,
+				suspend: suspend,
+				resume: resume
+			};
+		}
+
+		/**
+		 * Auto saves the post on the server.
+		 *
+		 * @since 3.9.0
+		 *
+		 * @returns {Object} {
+		 * 	{
+		 * 		tempBlockSave: tempBlockSave,
+		 * 		triggerSave: triggerSave,
+		 * 		postChanged: postChanged,
+		 * 		suspend: suspend,
+		 * 		resume: resume
+		 * 		}
+		 * 	} The object all functions for autosave.
+		 */
+		function autosaveServer() {
+			var _blockSave, _blockSaveTimer, previousCompareString, lastCompareString,
+				nextRun = 0,
+				isSuspended = false;
+
+
+			/**
+			 * Blocks saving for the next 10 seconds.
+			 *
+			 * @since 3.9.0
+			 *
+			 * @returns {void}
+			 */
+			function tempBlockSave() {
+				_blockSave = true;
+				window.clearTimeout( _blockSaveTimer );
+
+				_blockSaveTimer = window.setTimeout( function() {
+					_blockSave = false;
+				}, 10000 );
+			}
+
+			/**
+			 * Sets isSuspended to true.
+			 *
+			 * @since 3.9.0
+			 *
+			 * @returns {void}
+			 */
+			function suspend() {
+				isSuspended = true;
+			}
+
+			/**
+			 * Sets isSuspended to false.
+			 *
+			 * @since 3.9.0
+			 *
+			 * @returns {void}
+			 */
+			function resume() {
+				isSuspended = false;
+			}
+
+			/**
+			 * Triggers the autosave with the post data.
+			 *
+			 * @since 3.9.0
+			 *
+			 * @param {Object} data The post data.
+			 *
+			 * @returns {void}
+			 */
+			function response( data ) {
+				_schedule();
+				_blockSave = false;
+				lastCompareString = previousCompareString;
+				previousCompareString = '';
+
+				$document.trigger( 'after-autosave', [data] );
+				enableButtons();
+
+				if ( data.success ) {
+					// No longer an auto-draft
+					$( '#auto_draft' ).val('');
+				}
+			}
+
+			/**
+			 * Saves immediately.
+			 *
+			 * Resets the timing and tells heartbeat to connect now.
+			 *
+			 * @since 3.9.0
+			 *
+			 * @returns {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().
+			 *
+			 * @since 3.9.0
+			 *
+			 * @return {boolean} True if the post has been changed.
+			 */
+			function postChanged() {
+				return getCompareString() !== initialCompareString;
+			}
+
+			/**
+			 * Checks if the post can be saved or not.
+			 *
+			 * If the post hasn't changed or it cannot be updated,
+			 * because the autosave is blocked or suspended, the function returns false.
+			 *
+			 * @since 3.9.0
+			 *
+			 * @returns {Object} Returns the post data.
+			 */
+			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();
+
+				$document.trigger( 'wpcountwords', [ postData.content ] )
+					.trigger( 'before-autosave', [ postData ] );
+
+				postData._wpnonce = $( '#_wpnonce' ).val() || '';
+
+				return postData;
+			}
+
+			/**
+			 * Sets the next run, based on the autosave interval.
+			 *
+			 * @private
+			 *
+			 * @since 3.9.0
+			 *
+			 * @returns {void}
+			 */
+			function _schedule() {
+				nextRun = ( new Date() ).getTime() + ( autosaveL10n.autosaveInterval * 1000 ) || 60000;
+			}
+
+			/**
+			 * Sets the autosaveData on the autosave heartbeat.
+			 *
+			 * @since 3.9.0
+			 *
+			 * @returns {void}
+			 */
+			$document.on( 'heartbeat-send.autosave', function( event, data ) {
+				var autosaveData = save();
+
+				if ( autosaveData ) {
+					data.wp_autosave = autosaveData;
+				}
+
+				/**
+				 * Triggers the autosave of the post with the autosave data on the autosave
+				 * heartbeat.
+				 *
+				 * @since 3.9.0
+				 *
+				 * @returns {void}
+				 */
+			}).on( 'heartbeat-tick.autosave', function( event, data ) {
+				if ( data.wp_autosave ) {
+					response( data.wp_autosave );
+				}
+				/**
+				 * Disables buttons and throws a notice when the connection is lost.
+				 *
+				 * @since 3.9.0
+				 *
+				 * @returns {void}
+				 */
+			}).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();
+				}
+
+				/**
+				 * Enables buttons when the connection is restored.
+				 *
+				 * @since 3.9.0
+				 *
+				 * @returns {void}
+				 */
+			}).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
+			};
+		}
+
+		/**
+		 * Sets the autosave time out.
+		 *
+		 * Wait for TinyMCE to initialize plus 1 second. 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.
+		 *
+		 * @since 3.9.0
+		 *
+		 * @returns {void}
+		 */
+		$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()
+		};
+	}
+
+	/** @namespace wp */
+	window.wp = window.wp || {};
+	window.wp.autosave = autosave();
+
+}( jQuery, window ));