angelovcom.net

editor-expand.js (42607B)

---

 /**
  * @output wp-admin/js/editor-expand.js
  */
 
 ( function( window, $, undefined ) {
 	'use strict';
 
 	var $window = $( window ),
 		$document = $( document ),
 		$adminBar = $( '#wpadminbar' ),
 		$footer = $( '#wpfooter' );
 
 	/**
 	 * Handles the resizing of the editor.
 	 *
 	 * @since 4.0.0
 	 *
 	 * @return {void}
 	 */
 	$( function() {
 		var $wrap = $( '#postdivrich' ),
 			$contentWrap = $( '#wp-content-wrap' ),
 			$tools = $( '#wp-content-editor-tools' ),
 			$visualTop = $(),
 			$visualEditor = $(),
 			$textTop = $( '#ed_toolbar' ),
 			$textEditor = $( '#content' ),
 			textEditor = $textEditor[0],
 			oldTextLength = 0,
 			$bottom = $( '#post-status-info' ),
 			$menuBar = $(),
 			$statusBar = $(),
 			$sideSortables = $( '#side-sortables' ),
 			$postboxContainer = $( '#postbox-container-1' ),
 			$postBody = $('#post-body'),
 			fullscreen = window.wp.editor && window.wp.editor.fullscreen,
 			mceEditor,
 			mceBind = function(){},
 			mceUnbind = function(){},
 			fixedTop = false,
 			fixedBottom = false,
 			fixedSideTop = false,
 			fixedSideBottom = false,
 			scrollTimer,
 			lastScrollPosition = 0,
 			pageYOffsetAtTop = 130,
 			pinnedToolsTop = 56,
 			sidebarBottom = 20,
 			autoresizeMinHeight = 300,
 			initialMode = $contentWrap.hasClass( 'tmce-active' ) ? 'tinymce' : 'html',
 			advanced = !! parseInt( window.getUserSetting( 'hidetb' ), 10 ),
 			// These are corrected when adjust() runs, except on scrolling if already set.
 			heights = {
 				windowHeight: 0,
 				windowWidth: 0,
 				adminBarHeight: 0,
 				toolsHeight: 0,
 				menuBarHeight: 0,
 				visualTopHeight: 0,
 				textTopHeight: 0,
 				bottomHeight: 0,
 				statusBarHeight: 0,
 				sideSortablesHeight: 0
 			};
 
 		/**
 		 * Resizes textarea based on scroll height and width.
 		 *
 		 * Doesn't shrink the editor size below the 300px auto resize minimum height.
 		 *
 		 * @since 4.6.1
 		 *
 		 * @return {void}
 		 */
 		var shrinkTextarea = window._.throttle( function() {
 			var x = window.scrollX || document.documentElement.scrollLeft;
 			var y = window.scrollY || document.documentElement.scrollTop;
 			var height = parseInt( textEditor.style.height, 10 );
 
 			textEditor.style.height = autoresizeMinHeight + 'px';
 
 			if ( textEditor.scrollHeight > autoresizeMinHeight ) {
 				textEditor.style.height = textEditor.scrollHeight + 'px';
 			}
 
 			if ( typeof x !== 'undefined' ) {
 				window.scrollTo( x, y );
 			}
 
 			if ( textEditor.scrollHeight < height ) {
 				adjust();
 			}
 		}, 300 );
 
 		/**
 		 * Resizes the text editor depending on the old text length.
 		 *
 		 * If there is an mceEditor and it is hidden, it resizes the editor depending
 		 * on the old text length. If the current length of the text is smaller than
 		 * the old text length, it shrinks the text area. Otherwise it resizes the editor to
 		 * the scroll height.
 		 *
 		 * @since 4.6.1
 		 *
 		 * @return {void}
 		 */
 		function textEditorResize() {
 			var length = textEditor.value.length;
 
 			if ( mceEditor && ! mceEditor.isHidden() ) {
 				return;
 			}
 
 			if ( ! mceEditor && initialMode === 'tinymce' ) {
 				return;
 			}
 
 			if ( length < oldTextLength ) {
 				shrinkTextarea();
 			} else if ( parseInt( textEditor.style.height, 10 ) < textEditor.scrollHeight ) {
 				textEditor.style.height = Math.ceil( textEditor.scrollHeight ) + 'px';
 				adjust();
 			}
 
 			oldTextLength = length;
 		}
 
 		/**
 		 * Gets the height and widths of elements.
 		 *
 		 * Gets the heights of the window, the adminbar, the tools, the menu,
 		 * the visualTop, the textTop, the bottom, the statusbar and sideSortables
 		 * and stores these in the heights object. Defaults to 0.
 		 * Gets the width of the window and stores this in the heights object.
 		 *
 		 * @since 4.0.0
 		 *
 		 * @return {void}
 		 */
 		function getHeights() {
 			var windowWidth = $window.width();
 
 			heights = {
 				windowHeight: $window.height(),
 				windowWidth: windowWidth,
 				adminBarHeight: ( windowWidth > 600 ? $adminBar.outerHeight() : 0 ),
 				toolsHeight: $tools.outerHeight() || 0,
 				menuBarHeight: $menuBar.outerHeight() || 0,
 				visualTopHeight: $visualTop.outerHeight() || 0,
 				textTopHeight: $textTop.outerHeight() || 0,
 				bottomHeight: $bottom.outerHeight() || 0,
 				statusBarHeight: $statusBar.outerHeight() || 0,
 				sideSortablesHeight: $sideSortables.height() || 0
 			};
 
 			// Adjust for hidden menubar.
 			if ( heights.menuBarHeight < 3 ) {
 				heights.menuBarHeight = 0;
 			}
 		}
 
 		// We need to wait for TinyMCE to initialize.
 		/**
 		 * Binds all necessary functions for editor expand to the editor when the editor
 		 * is initialized.
 		 *
 		 * @since 4.0.0
 		 *
 		 * @param {event} event The TinyMCE editor init event.
 		 * @param {object} editor The editor to bind the vents on.
 		 *
 		 * @return {void}
 		 */
 		$document.on( 'tinymce-editor-init.editor-expand', function( event, editor ) {
 			// VK contains the type of key pressed. VK = virtual keyboard.
 			var VK = window.tinymce.util.VK,
 				/**
 				 * Hides any float panel with a hover state. Additionally hides tooltips.
 				 *
 				 * @return {void}
 				 */
 				hideFloatPanels = _.debounce( function() {
 					! $( '.mce-floatpanel:hover' ).length && window.tinymce.ui.FloatPanel.hideAll();
 					$( '.mce-tooltip' ).hide();
 				}, 1000, true );
 
 			// Make sure it's the main editor.
 			if ( editor.id !== 'content' ) {
 				return;
 			}
 
 			// Copy the editor instance.
 			mceEditor = editor;
 
 			// Set the minimum height to the initial viewport height.
 			editor.settings.autoresize_min_height = autoresizeMinHeight;
 
 			// Get the necessary UI elements.
 			$visualTop = $contentWrap.find( '.mce-toolbar-grp' );
 			$visualEditor = $contentWrap.find( '.mce-edit-area' );
 			$statusBar = $contentWrap.find( '.mce-statusbar' );
 			$menuBar = $contentWrap.find( '.mce-menubar' );
 
 			/**
 			 * Gets the offset of the editor.
 			 *
 			 * @return {number|boolean} Returns the offset of the editor
 			 * or false if there is no offset height.
 			 */
 			function mceGetCursorOffset() {
 				var node = editor.selection.getNode(),
 					range, view, offset;
 
 				/*
 				 * If editor.wp.getView and the selection node from the editor selection
 				 * are defined, use this as a view for the offset.
 				 */
 				if ( editor.wp && editor.wp.getView && ( view = editor.wp.getView( node ) ) ) {
 					offset = view.getBoundingClientRect();
 				} else {
 					range = editor.selection.getRng();
 
 					// Try to get the offset from a range.
 					try {
 						offset = range.getClientRects()[0];
 					} catch( er ) {}
 
 					// Get the offset from the bounding client rectangle of the node.
 					if ( ! offset ) {
 						offset = node.getBoundingClientRect();
 					}
 				}
 
 				return offset.height ? offset : false;
 			}
 
 			/**
 			 * Filters the special keys that should not be used for scrolling.
 			 *
 			 * @since 4.0.0
 			 *
 			 * @param {event} event The event to get the key code from.
 			 *
 			 * @return {void}
 			 */
 			function mceKeyup( event ) {
 				var key = event.keyCode;
 
 				// Bail on special keys. Key code 47 is a '/'.
 				if ( key <= 47 && ! ( key === VK.SPACEBAR || key === VK.ENTER || key === VK.DELETE || key === VK.BACKSPACE || key === VK.UP || key === VK.LEFT || key === VK.DOWN || key === VK.UP ) ) {
 					return;
 				// OS keys, function keys, num lock, scroll lock. Key code 91-93 are OS keys.
 				// Key code 112-123 are F1 to F12. Key code 144 is num lock. Key code 145 is scroll lock.
 				} else if ( ( key >= 91 && key <= 93 ) || ( key >= 112 && key <= 123 ) || key === 144 || key === 145 ) {
 					return;
 				}
 
 				mceScroll( key );
 			}
 
 			/**
 			 * Makes sure the cursor is always visible in the editor.
 			 *
 			 * Makes sure the cursor is kept between the toolbars of the editor and scrolls
 			 * the window when the cursor moves out of the viewport to a wpview.
 			 * Setting a buffer > 0 will prevent the browser default.
 			 * Some browsers will scroll to the middle,
 			 * others to the top/bottom of the *window* when moving the cursor out of the viewport.
 			 *
 			 * @since 4.1.0
 			 *
 			 * @param {string} key The key code of the pressed key.
 			 *
 			 * @return {void}
 			 */
 			function mceScroll( key ) {
 				var offset = mceGetCursorOffset(),
 					buffer = 50,
 					cursorTop, cursorBottom, editorTop, editorBottom;
 
 				// Don't scroll if there is no offset.
 				if ( ! offset ) {
 					return;
 				}
 
 				// Determine the cursorTop based on the offset and the top of the editor iframe.
 				cursorTop = offset.top + editor.iframeElement.getBoundingClientRect().top;
 
 				// Determine the cursorBottom based on the cursorTop and offset height.
 				cursorBottom = cursorTop + offset.height;
 
 				// Subtract the buffer from the cursorTop.
 				cursorTop = cursorTop - buffer;
 
 				// Add the buffer to the cursorBottom.
 				cursorBottom = cursorBottom + buffer;
 				editorTop = heights.adminBarHeight + heights.toolsHeight + heights.menuBarHeight + heights.visualTopHeight;
 
 				/*
 				 * Set the editorBottom based on the window Height, and add the bottomHeight and statusBarHeight if the
 				 * advanced editor is enabled.
 				 */
 				editorBottom = heights.windowHeight - ( advanced ? heights.bottomHeight + heights.statusBarHeight : 0 );
 
 				// Don't scroll if the node is taller than the visible part of the editor.
 				if ( editorBottom - editorTop < offset.height ) {
 					return;
 				}
 
 				/*
 				 * If the cursorTop is smaller than the editorTop and the up, left
 				 * or backspace key is pressed, scroll the editor to the position defined
 				 * by the cursorTop, pageYOffset and editorTop.
 				 */
 				if ( cursorTop < editorTop && ( key === VK.UP || key === VK.LEFT || key === VK.BACKSPACE ) ) {
 					window.scrollTo( window.pageXOffset, cursorTop + window.pageYOffset - editorTop );
 
 				/*
 				 * If any other key is pressed or the cursorTop is bigger than the editorTop,
 				 * scroll the editor to the position defined by the cursorBottom,
 				 * pageYOffset and editorBottom.
 				 */
 				} else if ( cursorBottom > editorBottom ) {
 					window.scrollTo( window.pageXOffset, cursorBottom + window.pageYOffset - editorBottom );
 				}
 			}
 
 			/**
 			 * If the editor is fullscreen, calls adjust.
 			 *
 			 * @since 4.1.0
 			 *
 			 * @param {event} event The FullscreenStateChanged event.
 			 *
 			 * @return {void}
 			 */
 			function mceFullscreenToggled( event ) {
 				// event.state is true if the editor is fullscreen.
 				if ( ! event.state ) {
 					adjust();
 				}
 			}
 
 			/**
 			 * Shows the editor when scrolled.
 			 *
 			 * Binds the hideFloatPanels function on the window scroll.mce-float-panels event.
 			 * Executes the wpAutoResize on the active editor.
 			 *
 			 * @since 4.0.0
 			 *
 			 * @return {void}
 			 */
 			function mceShow() {
 				$window.on( 'scroll.mce-float-panels', hideFloatPanels );
 
 				setTimeout( function() {
 					editor.execCommand( 'wpAutoResize' );
 					adjust();
 				}, 300 );
 			}
 
 			/**
 			 * Resizes the editor.
 			 *
 			 * Removes all functions from the window scroll.mce-float-panels event.
 			 * Resizes the text editor and scrolls to a position based on the pageXOffset and adminBarHeight.
 			 *
 			 * @since 4.0.0
 			 *
 			 * @return {void}
 			 */
 			function mceHide() {
 				$window.off( 'scroll.mce-float-panels' );
 
 				setTimeout( function() {
 					var top = $contentWrap.offset().top;
 
 					if ( window.pageYOffset > top ) {
 						window.scrollTo( window.pageXOffset, top - heights.adminBarHeight );
 					}
 
 					textEditorResize();
 					adjust();
 				}, 100 );
 
 				adjust();
 			}
 
 			/**
 			 * Toggles advanced states.
 			 *
 			 * @since 4.1.0
 			 *
 			 * @return {void}
 			 */
 			function toggleAdvanced() {
 				advanced = ! advanced;
 			}
 
 			/**
 			 * Binds events of the editor and window.
 			 *
 			 * @since 4.0.0
 			 *
 			 * @return {void}
 			 */
 			mceBind = function() {
 				editor.on( 'keyup', mceKeyup );
 				editor.on( 'show', mceShow );
 				editor.on( 'hide', mceHide );
 				editor.on( 'wp-toolbar-toggle', toggleAdvanced );
 
 				// Adjust when the editor resizes.
 				editor.on( 'setcontent wp-autoresize wp-toolbar-toggle', adjust );
 
 				// Don't hide the caret after undo/redo.
 				editor.on( 'undo redo', mceScroll );
 
 				// Adjust when exiting TinyMCE's fullscreen mode.
 				editor.on( 'FullscreenStateChanged', mceFullscreenToggled );
 
 				$window.off( 'scroll.mce-float-panels' ).on( 'scroll.mce-float-panels', hideFloatPanels );
 			};
 
 			/**
 			 * Unbinds the events of the editor and window.
 			 *
 			 * @since 4.0.0
 			 *
 			 * @return {void}
 			 */
 			mceUnbind = function() {
 				editor.off( 'keyup', mceKeyup );
 				editor.off( 'show', mceShow );
 				editor.off( 'hide', mceHide );
 				editor.off( 'wp-toolbar-toggle', toggleAdvanced );
 				editor.off( 'setcontent wp-autoresize wp-toolbar-toggle', adjust );
 				editor.off( 'undo redo', mceScroll );
 				editor.off( 'FullscreenStateChanged', mceFullscreenToggled );
 
 				$window.off( 'scroll.mce-float-panels' );
 			};
 
 			if ( $wrap.hasClass( 'wp-editor-expand' ) ) {
 
 				// Adjust "immediately".
 				mceBind();
 				initialResize( adjust );
 			}
 		} );
 
 		/**
 		 * Adjusts the toolbars heights and positions.
 		 *
 		 * Adjusts the toolbars heights and positions based on the scroll position on
 		 * the page, the active editor mode and the heights of the editor, admin bar and
 		 * side bar.
 		 *
 		 * @since 4.0.0
 		 *
 		 * @param {event} event The event that calls this function.
 		 *
 		 * @return {void}
 		 */
 		function adjust( event ) {
 
 			// Makes sure we're not in fullscreen mode.
 			if ( fullscreen && fullscreen.settings.visible ) {
 				return;
 			}
 
 			var windowPos = $window.scrollTop(),
 				type = event && event.type,
 				resize = type !== 'scroll',
 				visual = mceEditor && ! mceEditor.isHidden(),
 				buffer = autoresizeMinHeight,
 				postBodyTop = $postBody.offset().top,
 				borderWidth = 1,
 				contentWrapWidth = $contentWrap.width(),
 				$top, $editor, sidebarTop, footerTop, canPin,
 				topPos, topHeight, editorPos, editorHeight;
 
 			/*
 			 * Refresh the heights if type isn't 'scroll'
 			 * or heights.windowHeight isn't set.
 			 */
 			if ( resize || ! heights.windowHeight ) {
 				getHeights();
 			}
 
 			// Resize on resize event when the editor is in text mode.
 			if ( ! visual && type === 'resize' ) {
 				textEditorResize();
 			}
 
 			if ( visual ) {
 				$top = $visualTop;
 				$editor = $visualEditor;
 				topHeight = heights.visualTopHeight;
 			} else {
 				$top = $textTop;
 				$editor = $textEditor;
 				topHeight = heights.textTopHeight;
 			}
 
 			// Return if TinyMCE is still initializing.
 			if ( ! visual && ! $top.length ) {
 				return;
 			}
 
 			topPos = $top.parent().offset().top;
 			editorPos = $editor.offset().top;
 			editorHeight = $editor.outerHeight();
 
 			/*
 			 * If in visual mode, checks if the editorHeight is greater than the autoresizeMinHeight + topHeight.
 			 * If not in visual mode, checks if the editorHeight is greater than the autoresizeMinHeight + 20.
 			 */
 			canPin = visual ? autoresizeMinHeight + topHeight : autoresizeMinHeight + 20; // 20px from textarea padding.
 			canPin = editorHeight > ( canPin + 5 );
 
 			if ( ! canPin ) {
 				if ( resize ) {
 					$tools.css( {
 						position: 'absolute',
 						top: 0,
 						width: contentWrapWidth
 					} );
 
 					if ( visual && $menuBar.length ) {
 						$menuBar.css( {
 							position: 'absolute',
 							top: 0,
 							width: contentWrapWidth - ( borderWidth * 2 )
 						} );
 					}
 
 					$top.css( {
 						position: 'absolute',
 						top: heights.menuBarHeight,
 						width: contentWrapWidth - ( borderWidth * 2 ) - ( visual ? 0 : ( $top.outerWidth() - $top.width() ) )
 					} );
 
 					$statusBar.attr( 'style', advanced ? '' : 'visibility: hidden;' );
 					$bottom.attr( 'style', '' );
 				}
 			} else {
 				// Check if the top is not already in a fixed position.
 				if ( ( ! fixedTop || resize ) &&
 					( windowPos >= ( topPos - heights.toolsHeight - heights.adminBarHeight ) &&
 					windowPos <= ( topPos - heights.toolsHeight - heights.adminBarHeight + editorHeight - buffer ) ) ) {
 					fixedTop = true;
 
 					$tools.css( {
 						position: 'fixed',
 						top: heights.adminBarHeight,
 						width: contentWrapWidth
 					} );
 
 					if ( visual && $menuBar.length ) {
 						$menuBar.css( {
 							position: 'fixed',
 							top: heights.adminBarHeight + heights.toolsHeight,
 							width: contentWrapWidth - ( borderWidth * 2 ) - ( visual ? 0 : ( $top.outerWidth() - $top.width() ) )
 						} );
 					}
 
 					$top.css( {
 						position: 'fixed',
 						top: heights.adminBarHeight + heights.toolsHeight + heights.menuBarHeight,
 						width: contentWrapWidth - ( borderWidth * 2 ) - ( visual ? 0 : ( $top.outerWidth() - $top.width() ) )
 					} );
 					// Check if the top is already in a fixed position.
 				} else if ( fixedTop || resize ) {
 					if ( windowPos <= ( topPos - heights.toolsHeight - heights.adminBarHeight ) ) {
 						fixedTop = false;
 
 						$tools.css( {
 							position: 'absolute',
 							top: 0,
 							width: contentWrapWidth
 						} );
 
 						if ( visual && $menuBar.length ) {
 							$menuBar.css( {
 								position: 'absolute',
 								top: 0,
 								width: contentWrapWidth - ( borderWidth * 2 )
 							} );
 						}
 
 						$top.css( {
 							position: 'absolute',
 							top: heights.menuBarHeight,
 							width: contentWrapWidth - ( borderWidth * 2 ) - ( visual ? 0 : ( $top.outerWidth() - $top.width() ) )
 						} );
 					} else if ( windowPos >= ( topPos - heights.toolsHeight - heights.adminBarHeight + editorHeight - buffer ) ) {
 						fixedTop = false;
 
 						$tools.css( {
 							position: 'absolute',
 							top: editorHeight - buffer,
 							width: contentWrapWidth
 						} );
 
 						if ( visual && $menuBar.length ) {
 							$menuBar.css( {
 								position: 'absolute',
 								top: editorHeight - buffer,
 								width: contentWrapWidth - ( borderWidth * 2 )
 							} );
 						}
 
 						$top.css( {
 							position: 'absolute',
 							top: editorHeight - buffer + heights.menuBarHeight,
 							width: contentWrapWidth - ( borderWidth * 2 ) - ( visual ? 0 : ( $top.outerWidth() - $top.width() ) )
 						} );
 					}
 				}
 
 				// Check if the bottom is not already in a fixed position.
 				if ( ( ! fixedBottom || ( resize && advanced ) ) &&
 						// Add borderWidth for the border around the .wp-editor-container.
 						( windowPos + heights.windowHeight ) <= ( editorPos + editorHeight + heights.bottomHeight + heights.statusBarHeight + borderWidth ) ) {
 
 					if ( event && event.deltaHeight > 0 && event.deltaHeight < 100 ) {
 						window.scrollBy( 0, event.deltaHeight );
 					} else if ( visual && advanced ) {
 						fixedBottom = true;
 
 						$statusBar.css( {
 							position: 'fixed',
 							bottom: heights.bottomHeight,
 							visibility: '',
 							width: contentWrapWidth - ( borderWidth * 2 )
 						} );
 
 						$bottom.css( {
 							position: 'fixed',
 							bottom: 0,
 							width: contentWrapWidth
 						} );
 					}
 				} else if ( ( ! advanced && fixedBottom ) ||
 						( ( fixedBottom || resize ) &&
 						( windowPos + heights.windowHeight ) > ( editorPos + editorHeight + heights.bottomHeight + heights.statusBarHeight - borderWidth ) ) ) {
 					fixedBottom = false;
 
 					$statusBar.attr( 'style', advanced ? '' : 'visibility: hidden;' );
 					$bottom.attr( 'style', '' );
 				}
 			}
 
 			// The postbox container is positioned with @media from CSS. Ensure it is pinned on the side.
 			if ( $postboxContainer.width() < 300 && heights.windowWidth > 600 &&
 
 				// Check if the sidebar is not taller than the document height.
 				$document.height() > ( $sideSortables.height() + postBodyTop + 120 ) &&
 
 				// Check if the editor is taller than the viewport.
 				heights.windowHeight < editorHeight ) {
 
 				if ( ( heights.sideSortablesHeight + pinnedToolsTop + sidebarBottom ) > heights.windowHeight || fixedSideTop || fixedSideBottom ) {
 
 					// Reset the sideSortables style when scrolling to the top.
 					if ( windowPos + pinnedToolsTop <= postBodyTop ) {
 						$sideSortables.attr( 'style', '' );
 						fixedSideTop = fixedSideBottom = false;
 					} else {
 
 						// When scrolling down.
 						if ( windowPos > lastScrollPosition ) {
 							if ( fixedSideTop ) {
 
 								// Let it scroll.
 								fixedSideTop = false;
 								sidebarTop = $sideSortables.offset().top - heights.adminBarHeight;
 								footerTop = $footer.offset().top;
 
 								// Don't get over the footer.
 								if ( footerTop < sidebarTop + heights.sideSortablesHeight + sidebarBottom ) {
 									sidebarTop = footerTop - heights.sideSortablesHeight - 12;
 								}
 
 								$sideSortables.css({
 									position: 'absolute',
 									top: sidebarTop,
 									bottom: ''
 								});
 							} else if ( ! fixedSideBottom && heights.sideSortablesHeight + $sideSortables.offset().top + sidebarBottom < windowPos + heights.windowHeight ) {
 								// Pin the bottom.
 								fixedSideBottom = true;
 
 								$sideSortables.css({
 									position: 'fixed',
 									top: 'auto',
 									bottom: sidebarBottom
 								});
 							}
 
 						// When scrolling up.
 						} else if ( windowPos < lastScrollPosition ) {
 							if ( fixedSideBottom ) {
 								// Let it scroll.
 								fixedSideBottom = false;
 								sidebarTop = $sideSortables.offset().top - sidebarBottom;
 								footerTop = $footer.offset().top;
 
 								// Don't get over the footer.
 								if ( footerTop < sidebarTop + heights.sideSortablesHeight + sidebarBottom ) {
 									sidebarTop = footerTop - heights.sideSortablesHeight - 12;
 								}
 
 								$sideSortables.css({
 									position: 'absolute',
 									top: sidebarTop,
 									bottom: ''
 								});
 							} else if ( ! fixedSideTop && $sideSortables.offset().top >= windowPos + pinnedToolsTop ) {
 								// Pin the top.
 								fixedSideTop = true;
 
 								$sideSortables.css({
 									position: 'fixed',
 									top: pinnedToolsTop,
 									bottom: ''
 								});
 							}
 						}
 					}
 				} else {
 					// If the sidebar container is smaller than the viewport, then pin/unpin the top when scrolling.
 					if ( windowPos >= ( postBodyTop - pinnedToolsTop ) ) {
 
 						$sideSortables.css( {
 							position: 'fixed',
 							top: pinnedToolsTop
 						} );
 					} else {
 						$sideSortables.attr( 'style', '' );
 					}
 
 					fixedSideTop = fixedSideBottom = false;
 				}
 
 				lastScrollPosition = windowPos;
 			} else {
 				$sideSortables.attr( 'style', '' );
 				fixedSideTop = fixedSideBottom = false;
 			}
 
 			if ( resize ) {
 				$contentWrap.css( {
 					paddingTop: heights.toolsHeight
 				} );
 
 				if ( visual ) {
 					$visualEditor.css( {
 						paddingTop: heights.visualTopHeight + heights.menuBarHeight
 					} );
 				} else {
 					$textEditor.css( {
 						marginTop: heights.textTopHeight
 					} );
 				}
 			}
 		}
 
 		/**
 		 * Resizes the editor and adjusts the toolbars.
 		 *
 		 * @since 4.0.0
 		 *
 		 * @return {void}
 		 */
 		function fullscreenHide() {
 			textEditorResize();
 			adjust();
 		}
 
 		/**
 		 * Runs the passed function with 500ms intervals.
 		 *
 		 * @since 4.0.0
 		 *
 		 * @param {function} callback The function to run in the timeout.
 		 *
 		 * @return {void}
 		 */
 		function initialResize( callback ) {
 			for ( var i = 1; i < 6; i++ ) {
 				setTimeout( callback, 500 * i );
 			}
 		}
 
 		/**
 		 * Runs adjust after 100ms.
 		 *
 		 * @since 4.0.0
 		 *
 		 * @return {void}
 		 */
 		function afterScroll() {
 			clearTimeout( scrollTimer );
 			scrollTimer = setTimeout( adjust, 100 );
 		}
 
 		/**
 		 * Binds editor expand events on elements.
 		 *
 		 * @since 4.0.0
 		 *
 		 * @return {void}
 		 */
 		function on() {
 			/*
 			 * Scroll to the top when triggering this from JS.
 			 * Ensure the toolbars are pinned properly.
 			 */
 			if ( window.pageYOffset && window.pageYOffset > pageYOffsetAtTop ) {
 				window.scrollTo( window.pageXOffset, 0 );
 			}
 
 			$wrap.addClass( 'wp-editor-expand' );
 
 			// Adjust when the window is scrolled or resized.
 			$window.on( 'scroll.editor-expand resize.editor-expand', function( event ) {
 				adjust( event.type );
 				afterScroll();
 			} );
 
 			/*
 		 	 * Adjust when collapsing the menu, changing the columns
 		 	 * or changing the body class.
 			 */
 			$document.on( 'wp-collapse-menu.editor-expand postboxes-columnchange.editor-expand editor-classchange.editor-expand', adjust )
 				.on( 'postbox-toggled.editor-expand postbox-moved.editor-expand', function() {
 					if ( ! fixedSideTop && ! fixedSideBottom && window.pageYOffset > pinnedToolsTop ) {
 						fixedSideBottom = true;
 						window.scrollBy( 0, -1 );
 						adjust();
 						window.scrollBy( 0, 1 );
 					}
 
 					adjust();
 				}).on( 'wp-window-resized.editor-expand', function() {
 					if ( mceEditor && ! mceEditor.isHidden() ) {
 						mceEditor.execCommand( 'wpAutoResize' );
 					} else {
 						textEditorResize();
 					}
 				});
 
 			$textEditor.on( 'focus.editor-expand input.editor-expand propertychange.editor-expand', textEditorResize );
 			mceBind();
 
 			// Adjust when entering or exiting fullscreen mode.
 			fullscreen && fullscreen.pubsub.subscribe( 'hidden', fullscreenHide );
 
 			if ( mceEditor ) {
 				mceEditor.settings.wp_autoresize_on = true;
 				mceEditor.execCommand( 'wpAutoResizeOn' );
 
 				if ( ! mceEditor.isHidden() ) {
 					mceEditor.execCommand( 'wpAutoResize' );
 				}
 			}
 
 			if ( ! mceEditor || mceEditor.isHidden() ) {
 				textEditorResize();
 			}
 
 			adjust();
 
 			$document.trigger( 'editor-expand-on' );
 		}
 
 		/**
 		 * Unbinds editor expand events.
 		 *
 		 * @since 4.0.0
 		 *
 		 * @return {void}
 		 */
 		function off() {
 			var height = parseInt( window.getUserSetting( 'ed_size', 300 ), 10 );
 
 			if ( height < 50 ) {
 				height = 50;
 			} else if ( height > 5000 ) {
 				height = 5000;
 			}
 
 			/*
 			 * Scroll to the top when triggering this from JS.
 			 * Ensure the toolbars are reset properly.
 			 */
 			if ( window.pageYOffset && window.pageYOffset > pageYOffsetAtTop ) {
 				window.scrollTo( window.pageXOffset, 0 );
 			}
 
 			$wrap.removeClass( 'wp-editor-expand' );
 
 			$window.off( '.editor-expand' );
 			$document.off( '.editor-expand' );
 			$textEditor.off( '.editor-expand' );
 			mceUnbind();
 
 			// Adjust when entering or exiting fullscreen mode.
 			fullscreen && fullscreen.pubsub.unsubscribe( 'hidden', fullscreenHide );
 
 			// Reset all CSS.
 			$.each( [ $visualTop, $textTop, $tools, $menuBar, $bottom, $statusBar, $contentWrap, $visualEditor, $textEditor, $sideSortables ], function( i, element ) {
 				element && element.attr( 'style', '' );
 			});
 
 			fixedTop = fixedBottom = fixedSideTop = fixedSideBottom = false;
 
 			if ( mceEditor ) {
 				mceEditor.settings.wp_autoresize_on = false;
 				mceEditor.execCommand( 'wpAutoResizeOff' );
 
 				if ( ! mceEditor.isHidden() ) {
 					$textEditor.hide();
 
 					if ( height ) {
 						mceEditor.theme.resizeTo( null, height );
 					}
 				}
 			}
 
 			// If there is a height found in the user setting.
 			if ( height ) {
 				$textEditor.height( height );
 			}
 
 			$document.trigger( 'editor-expand-off' );
 		}
 
 		// Start on load.
 		if ( $wrap.hasClass( 'wp-editor-expand' ) ) {
 			on();
 
 			// Resize just after CSS has fully loaded and QuickTags is ready.
 			if ( $contentWrap.hasClass( 'html-active' ) ) {
 				initialResize( function() {
 					adjust();
 					textEditorResize();
 				} );
 			}
 		}
 
 		// Show the on/off checkbox.
 		$( '#adv-settings .editor-expand' ).show();
 		$( '#editor-expand-toggle' ).on( 'change.editor-expand', function() {
 			if ( $(this).prop( 'checked' ) ) {
 				on();
 				window.setUserSetting( 'editor_expand', 'on' );
 			} else {
 				off();
 				window.setUserSetting( 'editor_expand', 'off' );
 			}
 		});
 
 		// Expose on() and off().
 		window.editorExpand = {
 			on: on,
 			off: off
 		};
 	} );
 
 	/**
 	 * Handles the distraction free writing of TinyMCE.
 	 *
 	 * @since 4.1.0
 	 *
 	 * @return {void}
 	 */
 	$( function() {
 		var $body = $( document.body ),
 			$wrap = $( '#wpcontent' ),
 			$editor = $( '#post-body-content' ),
 			$title = $( '#title' ),
 			$content = $( '#content' ),
 			$overlay = $( document.createElement( 'DIV' ) ),
 			$slug = $( '#edit-slug-box' ),
 			$slugFocusEl = $slug.find( 'a' )
 				.add( $slug.find( 'button' ) )
 				.add( $slug.find( 'input' ) ),
 			$menuWrap = $( '#adminmenuwrap' ),
 			$editorWindow = $(),
 			$editorIframe = $(),
 			_isActive = window.getUserSetting( 'editor_expand', 'on' ) === 'on',
 			_isOn = _isActive ? window.getUserSetting( 'post_dfw' ) === 'on' : false,
 			traveledX = 0,
 			traveledY = 0,
 			buffer = 20,
 			faded, fadedAdminBar, fadedSlug,
 			editorRect, x, y, mouseY, scrollY,
 			focusLostTimer, overlayTimer, editorHasFocus;
 
 		$body.append( $overlay );
 
 		$overlay.css( {
 			display: 'none',
 			position: 'fixed',
 			top: $adminBar.height(),
 			right: 0,
 			bottom: 0,
 			left: 0,
 			'z-index': 9997
 		} );
 
 		$editor.css( {
 			position: 'relative'
 		} );
 
 		$window.on( 'mousemove.focus', function( event ) {
 			mouseY = event.pageY;
 		} );
 
 		/**
 		 * Recalculates the bottom and right position of the editor in the DOM.
 		 *
 		 * @since 4.1.0
 		 *
 		 * @return {void}
 		 */
 		function recalcEditorRect() {
 			editorRect = $editor.offset();
 			editorRect.right = editorRect.left + $editor.outerWidth();
 			editorRect.bottom = editorRect.top + $editor.outerHeight();
 		}
 
 		/**
 		 * Activates the distraction free writing mode.
 		 *
 		 * @since 4.1.0
 		 *
 		 * @return {void}
 		 */
 		function activate() {
 			if ( ! _isActive ) {
 				_isActive = true;
 
 				$document.trigger( 'dfw-activate' );
 				$content.on( 'keydown.focus-shortcut', toggleViaKeyboard );
 			}
 		}
 
 		/**
 		 * Deactivates the distraction free writing mode.
 		 *
 		 * @since 4.1.0
 		 *
 		 * @return {void}
 		 */
 		function deactivate() {
 			if ( _isActive ) {
 				off();
 
 				_isActive = false;
 
 				$document.trigger( 'dfw-deactivate' );
 				$content.off( 'keydown.focus-shortcut' );
 			}
 		}
 
 		/**
 		 * Returns _isActive.
 		 *
 		 * @since 4.1.0
 		 *
 		 * @return {boolean} Returns true is _isActive is true.
 		 */
 		function isActive() {
 			return _isActive;
 		}
 
 		/**
 		 * Binds events on the editor for distraction free writing.
 		 *
 		 * @since 4.1.0
 		 *
 		 * @return {void}
 		 */
 		function on() {
 			if ( ! _isOn && _isActive ) {
 				_isOn = true;
 
 				$content.on( 'keydown.focus', fadeOut );
 
 				$title.add( $content ).on( 'blur.focus', maybeFadeIn );
 
 				fadeOut();
 
 				window.setUserSetting( 'post_dfw', 'on' );
 
 				$document.trigger( 'dfw-on' );
 			}
 		}
 
 		/**
 		 * Unbinds events on the editor for distraction free writing.
 		 *
 		 * @since 4.1.0
 		 *
 		 * @return {void}
 		 */
 		function off() {
 			if ( _isOn ) {
 				_isOn = false;
 
 				$title.add( $content ).off( '.focus' );
 
 				fadeIn();
 
 				$editor.off( '.focus' );
 
 				window.setUserSetting( 'post_dfw', 'off' );
 
 				$document.trigger( 'dfw-off' );
 			}
 		}
 
 		/**
 		 * Binds or unbinds the editor expand events.
 		 *
 		 * @since 4.1.0
 		 *
 		 * @return {void}
 		 */
 		function toggle() {
 			if ( _isOn ) {
 				off();
 			} else {
 				on();
 			}
 		}
 
 		/**
 		 * Returns the value of _isOn.
 		 *
 		 * @since 4.1.0
 		 *
 		 * @return {boolean} Returns true if _isOn is true.
 		 */
 		function isOn() {
 			return _isOn;
 		}
 
 		/**
 		 * Fades out all elements except for the editor.
 		 *
 		 * The fading is done based on key presses and mouse movements.
 		 * Also calls the fadeIn on certain key presses
 		 * or if the mouse leaves the editor.
 		 *
 		 * @since 4.1.0
 		 *
 		 * @param event The event that triggers this function.
 		 *
 		 * @return {void}
 		 */
 		function fadeOut( event ) {
 			var isMac,
 				key = event && event.keyCode;
 
 			if ( window.navigator.platform ) {
 				isMac = ( window.navigator.platform.indexOf( 'Mac' ) > -1 );
 			}
 
 			// Fade in and returns on Escape and keyboard shortcut Alt+Shift+W and Ctrl+Opt+W.
 			if ( key === 27 || ( key === 87 && event.altKey && ( ( ! isMac && event.shiftKey ) || ( isMac && event.ctrlKey ) ) ) ) {
 				fadeIn( event );
 				return;
 			}
 
 			// Return if any of the following keys or combinations of keys is pressed.
 			if ( event && ( event.metaKey || ( event.ctrlKey && ! event.altKey ) || ( event.altKey && event.shiftKey ) || ( key && (
 				// Special keys ( tab, ctrl, alt, esc, arrow keys... ).
 				( key <= 47 && key !== 8 && key !== 13 && key !== 32 && key !== 46 ) ||
 				// Windows keys.
 				( key >= 91 && key <= 93 ) ||
 				// F keys.
 				( key >= 112 && key <= 135 ) ||
 				// Num Lock, Scroll Lock, OEM.
 				( key >= 144 && key <= 150 ) ||
 				// OEM or non-printable.
 				key >= 224
 			) ) ) ) {
 				return;
 			}
 
 			if ( ! faded ) {
 				faded = true;
 
 				clearTimeout( overlayTimer );
 
 				overlayTimer = setTimeout( function() {
 					$overlay.show();
 				}, 600 );
 
 				$editor.css( 'z-index', 9998 );
 
 				$overlay
 					// Always recalculate the editor area when entering the overlay with the mouse.
 					.on( 'mouseenter.focus', function() {
 						recalcEditorRect();
 
 						$window.on( 'scroll.focus', function() {
 							var nScrollY = window.pageYOffset;
 
 							if ( (
 								scrollY && mouseY &&
 								scrollY !== nScrollY
 							) && (
 								mouseY < editorRect.top - buffer ||
 								mouseY > editorRect.bottom + buffer
 							) ) {
 								fadeIn();
 							}
 
 							scrollY = nScrollY;
 						} );
 					} )
 					.on( 'mouseleave.focus', function() {
 						x = y =  null;
 						traveledX = traveledY = 0;
 
 						$window.off( 'scroll.focus' );
 					} )
 					// Fade in when the mouse moves away form the editor area.
 					.on( 'mousemove.focus', function( event ) {
 						var nx = event.clientX,
 							ny = event.clientY,
 							pageYOffset = window.pageYOffset,
 							pageXOffset = window.pageXOffset;
 
 						if ( x && y && ( nx !== x || ny !== y ) ) {
 							if (
 								( ny <= y && ny < editorRect.top - pageYOffset ) ||
 								( ny >= y && ny > editorRect.bottom - pageYOffset ) ||
 								( nx <= x && nx < editorRect.left - pageXOffset ) ||
 								( nx >= x && nx > editorRect.right - pageXOffset )
 							) {
 								traveledX += Math.abs( x - nx );
 								traveledY += Math.abs( y - ny );
 
 								if ( (
 									ny <= editorRect.top - buffer - pageYOffset ||
 									ny >= editorRect.bottom + buffer - pageYOffset ||
 									nx <= editorRect.left - buffer - pageXOffset ||
 									nx >= editorRect.right + buffer - pageXOffset
 								) && (
 									traveledX > 10 ||
 									traveledY > 10
 								) ) {
 									fadeIn();
 
 									x = y =  null;
 									traveledX = traveledY = 0;
 
 									return;
 								}
 							} else {
 								traveledX = traveledY = 0;
 							}
 						}
 
 						x = nx;
 						y = ny;
 					} )
 
 					// When the overlay is touched, fade in and cancel the event.
 					.on( 'touchstart.focus', function( event ) {
 						event.preventDefault();
 						fadeIn();
 					} );
 
 				$editor.off( 'mouseenter.focus' );
 
 				if ( focusLostTimer ) {
 					clearTimeout( focusLostTimer );
 					focusLostTimer = null;
 				}
 
 				$body.addClass( 'focus-on' ).removeClass( 'focus-off' );
 			}
 
 			fadeOutAdminBar();
 			fadeOutSlug();
 		}
 
 		/**
 		 * Fades all elements back in.
 		 *
 		 * @since 4.1.0
 		 *
 		 * @param event The event that triggers this function.
 		 *
 		 * @return {void}
 		 */
 		function fadeIn( event ) {
 			if ( faded ) {
 				faded = false;
 
 				clearTimeout( overlayTimer );
 
 				overlayTimer = setTimeout( function() {
 					$overlay.hide();
 				}, 200 );
 
 				$editor.css( 'z-index', '' );
 
 				$overlay.off( 'mouseenter.focus mouseleave.focus mousemove.focus touchstart.focus' );
 
 				/*
 				 * When fading in, temporarily watch for refocus and fade back out - helps
 				 * with 'accidental' editor exits with the mouse. When fading in and the event
 				 * is a key event (Escape or Alt+Shift+W) don't watch for refocus.
 				 */
 				if ( 'undefined' === typeof event ) {
 					$editor.on( 'mouseenter.focus', function() {
 						if ( $.contains( $editor.get( 0 ), document.activeElement ) || editorHasFocus ) {
 							fadeOut();
 						}
 					} );
 				}
 
 				focusLostTimer = setTimeout( function() {
 					focusLostTimer = null;
 					$editor.off( 'mouseenter.focus' );
 				}, 1000 );
 
 				$body.addClass( 'focus-off' ).removeClass( 'focus-on' );
 			}
 
 			fadeInAdminBar();
 			fadeInSlug();
 		}
 
 		/**
 		 * Fades in if the focused element based on it position.
 		 *
 		 * @since 4.1.0
 		 *
 		 * @return {void}
 		 */
 		function maybeFadeIn() {
 			setTimeout( function() {
 				var position = document.activeElement.compareDocumentPosition( $editor.get( 0 ) );
 
 				function hasFocus( $el ) {
 					return $.contains( $el.get( 0 ), document.activeElement );
 				}
 
 				// The focused node is before or behind the editor area, and not outside the wrap.
 				if ( ( position === 2 || position === 4 ) && ( hasFocus( $menuWrap ) || hasFocus( $wrap ) || hasFocus( $footer ) ) ) {
 					fadeIn();
 				}
 			}, 0 );
 		}
 
 		/**
 		 * Fades out the admin bar based on focus on the admin bar.
 		 *
 		 * @since 4.1.0
 		 *
 		 * @return {void}
 		 */
 		function fadeOutAdminBar() {
 			if ( ! fadedAdminBar && faded ) {
 				fadedAdminBar = true;
 
 				$adminBar
 					.on( 'mouseenter.focus', function() {
 						$adminBar.addClass( 'focus-off' );
 					} )
 					.on( 'mouseleave.focus', function() {
 						$adminBar.removeClass( 'focus-off' );
 					} );
 			}
 		}
 
 		/**
 		 * Fades in the admin bar.
 		 *
 		 * @since 4.1.0
 		 *
 		 * @return {void}
 		 */
 		function fadeInAdminBar() {
 			if ( fadedAdminBar ) {
 				fadedAdminBar = false;
 
 				$adminBar.off( '.focus' );
 			}
 		}
 
 		/**
 		 * Fades out the edit slug box.
 		 *
 		 * @since 4.1.0
 		 *
 		 * @return {void}
 		 */
 		function fadeOutSlug() {
 			if ( ! fadedSlug && faded && ! $slug.find( ':focus').length ) {
 				fadedSlug = true;
 
 				$slug.stop().fadeTo( 'fast', 0.3 ).on( 'mouseenter.focus', fadeInSlug ).off( 'mouseleave.focus' );
 
 				$slugFocusEl.on( 'focus.focus', fadeInSlug ).off( 'blur.focus' );
 			}
 		}
 
 		/**
 		 * Fades in the edit slug box.
 		 *
 		 * @since 4.1.0
 		 *
 		 * @return {void}
 		 */
 		function fadeInSlug() {
 			if ( fadedSlug ) {
 				fadedSlug = false;
 
 				$slug.stop().fadeTo( 'fast', 1 ).on( 'mouseleave.focus', fadeOutSlug ).off( 'mouseenter.focus' );
 
 				$slugFocusEl.on( 'blur.focus', fadeOutSlug ).off( 'focus.focus' );
 			}
 		}
 
 		/**
 		 * Triggers the toggle on Alt + Shift + W.
 		 *
 		 * Keycode 87 = w.
 		 *
 		 * @since 4.1.0
 		 *
 		 * @param {event} event The event to trigger the toggle.
 		 *
 		 * @return {void}
 		 */
 		function toggleViaKeyboard( event ) {
 			if ( event.altKey && event.shiftKey && 87 === event.keyCode ) {
 				toggle();
 			}
 		}
 
 		if ( $( '#postdivrich' ).hasClass( 'wp-editor-expand' ) ) {
 			$content.on( 'keydown.focus-shortcut', toggleViaKeyboard );
 		}
 
 		/**
 		 * Adds the distraction free writing button when setting up TinyMCE.
 		 *
 		 * @since 4.1.0
 		 *
 		 * @param {event} event The TinyMCE editor setup event.
 		 * @param {object} editor The editor to add the button to.
 		 *
 		 * @return {void}
 		 */
 		$document.on( 'tinymce-editor-setup.focus', function( event, editor ) {
 			editor.addButton( 'dfw', {
 				active: _isOn,
 				classes: 'wp-dfw btn widget',
 				disabled: ! _isActive,
 				onclick: toggle,
 				onPostRender: function() {
 					var button = this;
 
 					editor.on( 'init', function() {
 						if ( button.disabled() ) {
 							button.hide();
 						}
 					} );
 
 					$document
 					.on( 'dfw-activate.focus', function() {
 						button.disabled( false );
 						button.show();
 					} )
 					.on( 'dfw-deactivate.focus', function() {
 						button.disabled( true );
 						button.hide();
 					} )
 					.on( 'dfw-on.focus', function() {
 						button.active( true );
 					} )
 					.on( 'dfw-off.focus', function() {
 						button.active( false );
 					} );
 				},
 				tooltip: 'Distraction-free writing mode',
 				shortcut: 'Alt+Shift+W'
 			} );
 
 			editor.addCommand( 'wpToggleDFW', toggle );
 			editor.addShortcut( 'access+w', '', 'wpToggleDFW' );
 		} );
 
 		/**
 		 * Binds and unbinds events on the editor.
 		 *
 		 * @since 4.1.0
 		 *
 		 * @param {event} event The TinyMCE editor init event.
 		 * @param {object} editor The editor to bind events on.
 		 *
 		 * @return {void}
 		 */
 		$document.on( 'tinymce-editor-init.focus', function( event, editor ) {
 			var mceBind, mceUnbind;
 
 			function focus() {
 				editorHasFocus = true;
 			}
 
 			function blur() {
 				editorHasFocus = false;
 			}
 
 			if ( editor.id === 'content' ) {
 				$editorWindow = $( editor.getWin() );
 				$editorIframe = $( editor.getContentAreaContainer() ).find( 'iframe' );
 
 				mceBind = function() {
 					editor.on( 'keydown', fadeOut );
 					editor.on( 'blur', maybeFadeIn );
 					editor.on( 'focus', focus );
 					editor.on( 'blur', blur );
 					editor.on( 'wp-autoresize', recalcEditorRect );
 				};
 
 				mceUnbind = function() {
 					editor.off( 'keydown', fadeOut );
 					editor.off( 'blur', maybeFadeIn );
 					editor.off( 'focus', focus );
 					editor.off( 'blur', blur );
 					editor.off( 'wp-autoresize', recalcEditorRect );
 				};
 
 				if ( _isOn ) {
 					mceBind();
 				}
 
 				// Bind and unbind based on the distraction free writing focus.
 				$document.on( 'dfw-on.focus', mceBind ).on( 'dfw-off.focus', mceUnbind );
 
 				// Focuse the editor when it is the target of the click event.
 				editor.on( 'click', function( event ) {
 					if ( event.target === editor.getDoc().documentElement ) {
 						editor.focus();
 					}
 				} );
 			}
 		} );
 
 		/**
 		 *  Binds events on quicktags init.
 		 *
 		 * @since 4.1.0
 		 *
 		 * @param {event} event The quicktags init event.
 		 * @param {object} editor The editor to bind events on.
 		 *
 		 * @return {void}
 		 */
 		$document.on( 'quicktags-init', function( event, editor ) {
 			var $button;
 
 			// Bind the distraction free writing events if the distraction free writing button is available.
 			if ( editor.settings.buttons && ( ',' + editor.settings.buttons + ',' ).indexOf( ',dfw,' ) !== -1 ) {
 				$button = $( '#' + editor.name + '_dfw' );
 
 				$( document )
 				.on( 'dfw-activate', function() {
 					$button.prop( 'disabled', false );
 				} )
 				.on( 'dfw-deactivate', function() {
 					$button.prop( 'disabled', true );
 				} )
 				.on( 'dfw-on', function() {
 					$button.addClass( 'active' );
 				} )
 				.on( 'dfw-off', function() {
 					$button.removeClass( 'active' );
 				} );
 			}
 		} );
 
 		$document.on( 'editor-expand-on.focus', activate ).on( 'editor-expand-off.focus', deactivate );
 
 		if ( _isOn ) {
 			$content.on( 'keydown.focus', fadeOut );
 
 			$title.add( $content ).on( 'blur.focus', maybeFadeIn );
 		}
 
 		window.wp = window.wp || {};
 		window.wp.editor = window.wp.editor || {};
 		window.wp.editor.dfw = {
 			activate: activate,
 			deactivate: deactivate,
 			isActive: isActive,
 			on: on,
 			off: off,
 			toggle: toggle,
 			isOn: isOn
 		};
 	} );
 } )( window, window.jQuery );