Index: src/wp-admin/edit-form-advanced.php
===================================================================
--- src/wp-admin/edit-form-advanced.php	(revision 30177)
+++ src/wp-admin/edit-form-advanced.php	(working copy)
@@ -512,7 +512,6 @@
 <div id="postdivrich" class="postarea<?php if ( $_wp_editor_expand ) { echo ' wp-editor-expand'; } ?>">
 
 <?php wp_editor( $post->post_content, 'content', array(
-	'dfw' => true,
 	'drag_drop_upload' => true,
 	'tabfocus_elements' => 'content-html,save-post',
 	'editor_height' => 300,
Index: src/wp-admin/js/editor-expand.js
===================================================================
--- src/wp-admin/js/editor-expand.js	(revision 30177)
+++ src/wp-admin/js/editor-expand.js	(working copy)
@@ -1,409 +1,357 @@
-/* global tinymce */
+( function( window, $, undefined ) {
+	'use strict';
 
-window.wp = window.wp || {};
-
-jQuery( document ).ready( function( $ ) {
 	var $window = $( window ),
 		$document = $( document ),
 		$adminBar = $( '#wpadminbar' ),
-		$footer = $( '#wpfooter' ),
-		$wrap = $( '#postdivrich' ),
-		$contentWrap = $( '#wp-content-wrap' ),
-		$tools = $( '#wp-content-editor-tools' ),
-		$visualTop = $(),
-		$visualEditor = $(),
-		$textTop = $( '#ed_toolbar' ),
-		$textEditor = $( '#content' ),
-		$textEditorClone = $( '<div id="content-textarea-clone"></div>' ),
-		$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 = window.getUserSetting( 'editor' ),
-		// 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
-		};
-
-	$textEditorClone.insertAfter( $textEditor );
-
-	$textEditorClone.css( {
-		'font-family': $textEditor.css( 'font-family' ),
-		'font-size': $textEditor.css( 'font-size' ),
-		'line-height': $textEditor.css( 'line-height' ),
-		'white-space': 'pre-wrap',
-		'word-wrap': 'break-word'
-	} );
-
-	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
-		if ( heights.menuBarHeight < 3 ) {
-			heights.menuBarHeight = 0;
-		}
-	}
-
-	function textEditorKeyup( event ) {
-		var VK = jQuery.ui.keyCode,
-			key = event.keyCode,
-			range = document.createRange(),
-			selStart = $textEditor[0].selectionStart,
-			selEnd = $textEditor[0].selectionEnd,
-			textNode = $textEditorClone[0].firstChild,
-			buffer = 10,
-			offset, cursorTop, cursorBottom, editorTop, editorBottom;
+		$footer = $( '#wpfooter' );
 
-		if ( selStart && selEnd && selStart !== selEnd ) {
-			return;
-		}
-
-		// These are not TinyMCE ranges.
-		try {
-			range.setStart( textNode, selStart );
-			range.setEnd( textNode, selEnd + 1 );
-		} catch ( ex ) {}
-
-		offset = range.getBoundingClientRect();
-
-		if ( ! offset.height ) {
-			return;
-		}
-
-		cursorTop = offset.top - buffer;
-		cursorBottom = cursorTop + offset.height + buffer;
-		editorTop = heights.adminBarHeight + heights.toolsHeight + heights.textTopHeight;
-		editorBottom = heights.windowHeight - heights.bottomHeight;
+	/* Autoresize editor. */
+	$( function() {
+		var $wrap = $( '#postdivrich' ),
+			$contentWrap = $( '#wp-content-wrap' ),
+			$tools = $( '#wp-content-editor-tools' ),
+			$visualTop = $(),
+			$visualEditor = $(),
+			$textTop = $( '#ed_toolbar' ),
+			$textEditor = $( '#content' ),
+			$textEditorClone = $( '<div id="content-textarea-clone"></div>' ),
+			$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 = window.getUserSetting( 'editor' ),
+			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
+			};
+
+		$textEditorClone.insertAfter( $textEditor );
+
+		$textEditorClone.css( {
+			'font-family': $textEditor.css( 'font-family' ),
+			'font-size': $textEditor.css( 'font-size' ),
+			'line-height': $textEditor.css( 'line-height' ),
+			'white-space': 'pre-wrap',
+			'word-wrap': 'break-word'
+		} );
 
-		if ( cursorTop < editorTop && ( key === VK.UP || key === VK.LEFT || key === VK.BACKSPACE ) ) {
-			window.scrollTo( window.pageXOffset, cursorTop + window.pageYOffset - editorTop );
-		} else if ( cursorBottom > editorBottom ) {
-			window.scrollTo( window.pageXOffset, cursorBottom + window.pageYOffset - editorBottom );
-		}
-	}
+		function getHeights() {
+			var windowWidth = $window.width();
 
-	function textEditorResize() {
-		if ( ( mceEditor && ! mceEditor.isHidden() ) || ( ! mceEditor && initialMode === 'tinymce' ) ) {
-			return;
+			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
+			if ( heights.menuBarHeight < 3 ) {
+				heights.menuBarHeight = 0;
+			}
 		}
 
-		var textEditorHeight = $textEditor.height(),
-			hiddenHeight;
-
-		$textEditorClone.width( $textEditor.width() - 22 );
-		$textEditorClone.text( $textEditor.val() + '&nbsp;' );
-
-		hiddenHeight = $textEditorClone.height();
+		function textEditorKeyup( event ) {
+			var VK = jQuery.ui.keyCode,
+				key = event.keyCode,
+				range = document.createRange(),
+				selStart = $textEditor[0].selectionStart,
+				selEnd = $textEditor[0].selectionEnd,
+				textNode = $textEditorClone[0].firstChild,
+				buffer = 10,
+				offset, cursorTop, cursorBottom, editorTop, editorBottom;
 
-		if ( hiddenHeight < autoresizeMinHeight ) {
-			hiddenHeight = autoresizeMinHeight;
-		}
+			if ( selStart && selEnd && selStart !== selEnd ) {
+				return;
+			}
 
-		if ( hiddenHeight === textEditorHeight ) {
-			return;
-		}
+			// These are not TinyMCE ranges.
+			try {
+				range.setStart( textNode, selStart );
+				range.setEnd( textNode, selEnd + 1 );
+			} catch ( ex ) {}
 
-		$textEditor.height( hiddenHeight );
+			offset = range.getBoundingClientRect();
 
-		adjust();
-	}
+			if ( ! offset.height ) {
+				return;
+			}
 
-	// We need to wait for TinyMCE to initialize.
-	$document.on( 'tinymce-editor-init.editor-expand', function( event, editor ) {
-		var hideFloatPanels = _.debounce( function() {
-			! $( '.mce-floatpanel:hover' ).length && tinymce.ui.FloatPanel.hideAll();
-			$( '.mce-tooltip' ).hide();
-		}, 1000, true );
+			cursorTop = offset.top - buffer;
+			cursorBottom = cursorTop + offset.height + buffer;
+			editorTop = heights.adminBarHeight + heights.toolsHeight + heights.textTopHeight;
+			editorBottom = heights.windowHeight - heights.bottomHeight;
 
-		// Make sure it's the main editor.
-		if ( editor.id !== 'content' ) {
-			return;
+			if ( cursorTop < editorTop && ( key === VK.UP || key === VK.LEFT || key === VK.BACKSPACE ) ) {
+				window.scrollTo( window.pageXOffset, cursorTop + window.pageYOffset - editorTop );
+			} else if ( cursorBottom > editorBottom ) {
+				window.scrollTo( window.pageXOffset, cursorBottom + window.pageYOffset - editorBottom );
+			}
 		}
 
-		// Copy the editor instance.
-		mceEditor = editor;
-
-		// Set the minimum height to the initial viewport height.
-		editor.settings.autoresize_min_height = autoresizeMinHeight;
+		function textEditorResize() {
+			if ( ( mceEditor && ! mceEditor.isHidden() ) || ( ! mceEditor && initialMode === 'tinymce' ) ) {
+				return;
+			}
 
-		// 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' );
+			var textEditorHeight = $textEditor.height(),
+				hiddenHeight;
 
-		function mceGetCursorOffset() {
-			var node = editor.selection.getNode(),
-				range, view, offset;
+			$textEditorClone.width( $textEditor.width() - 22 );
+			$textEditorClone.text( $textEditor.val() + '&nbsp;' );
 
-			if ( editor.plugins.wpview && ( view = editor.plugins.wpview.getView( node ) ) ) {
-				offset = view.getBoundingClientRect();
-			} else {
-				range = editor.selection.getRng();
+			hiddenHeight = $textEditorClone.height();
 
-				try {
-					offset = range.getClientRects()[0];
-				} catch( er ) {}
+			if ( hiddenHeight < autoresizeMinHeight ) {
+				hiddenHeight = autoresizeMinHeight;
+			}
 
-				if ( ! offset ) {
-					offset = node.getBoundingClientRect();
-				}
+			if ( hiddenHeight === textEditorHeight ) {
+				return;
 			}
 
-			return offset.height ? offset : false;
-		}
+			$textEditor.height( hiddenHeight );
 
-		// Make sure the cursor is always visible.
-		// This is not only necessary to keep the cursor between the toolbars,
-		// but also to scroll 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.
-		function mceKeyup( event ) {
-			var VK = tinymce.util.VK,
-				key = event.keyCode;
+			adjust();
+		}
 
-			// Bail on special keys.
-			if ( key <= 47 && ! ( key === VK.SPACEBAR || key === VK.ENTER || key === VK.DELETE || key === VK.BACKSPACE ||
-				key === VK.UP || key === VK.RIGHT || key === VK.DOWN || key === VK.LEFT ) ) {
+		// We need to wait for TinyMCE to initialize.
+		$document.on( 'tinymce-editor-init.editor-expand', function( event, editor ) {
+			var VK = window.tinymce.util.VK,
+				hideFloatPanels = _.debounce( function() {
+					! $( '.mce-floatpanel:hover' ).length && window.tinymce.ui.FloatPanel.hideAll();
+					$( '.mce-tooltip' ).hide();
+				}, 1000, true );
 
-				return;
-			// OS keys, function keys, num lock, scroll lock
-			} else if ( ( key >= 91 && key <= 93 ) || ( key >= 112 && key <= 123 ) || key === 144 || key === 145 ) {
+			// Make sure it's the main editor.
+			if ( editor.id !== 'content' ) {
 				return;
 			}
 
-			mceScroll( key );
-		}
+			// Copy the editor instance.
+			mceEditor = editor;
 
-		function mceScroll( key ) {
-			var VK = tinymce.util.VK,
-				offset = mceGetCursorOffset(),
-				buffer = 10,
-				cursorTop, cursorBottom, editorTop, editorBottom;
+			// Set the minimum height to the initial viewport height.
+			editor.settings.autoresize_min_height = autoresizeMinHeight;
 
-			if ( ! offset ) {
-				return;
-			}
+			// 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' );
+
+			function mceGetCursorOffset() {
+				var node = editor.selection.getNode(),
+					range, view, offset;
 
-			cursorTop = offset.top + editor.iframeElement.getBoundingClientRect().top;
-			cursorBottom = cursorTop + offset.height + buffer;
-			cursorTop -= buffer;
-			editorTop = heights.adminBarHeight + heights.toolsHeight + heights.menuBarHeight + heights.visualTopHeight;
-			editorBottom = heights.windowHeight - heights.bottomHeight - heights.statusBarHeight;
+				if ( editor.plugins.wpview && ( view = editor.plugins.wpview.getView( node ) ) ) {
+					offset = view.getBoundingClientRect();
+				} else {
+					range = editor.selection.getRng();
 
-			// Don't scroll if the node is taller than the visible part of the editor
-			if ( editorBottom - editorTop < offset.height ) {
-				return;
-			}
+					try {
+						offset = range.getClientRects()[0];
+					} catch( er ) {}
 
-			// WebKit browsers scroll-into-view to the middle of the window but not for arrow keys/backspace.
-			// The others scroll to the top of the window, we need to account for the adminbar and editor toolbar(s).
-			if ( cursorTop < editorTop && ( ! tinymce.Env.webkit ||
-				( key === VK.UP || key === VK.RIGHT || key === VK.DOWN || key === VK.LEFT || key === VK.BACKSPACE ) ) ) {
+					if ( ! offset ) {
+						offset = node.getBoundingClientRect();
+					}
+				}
 
-				window.scrollTo( window.pageXOffset, cursorTop + window.pageYOffset - editorTop );
-			} else if ( cursorBottom > editorBottom ) {
-				window.scrollTo( window.pageXOffset, cursorBottom + window.pageYOffset - editorBottom );
+				return offset.height ? offset : false;
 			}
-		}
 
-		// Adjust when switching editor modes.
-		function mceShow() {
-			$window.on( 'scroll.mce-float-panels', hideFloatPanels );
+			// Make sure the cursor is always visible.
+			// This is not only necessary to keep the cursor between the toolbars,
+			// but also to scroll 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.
+			function mceKeyup( event ) {
+				var key = event.keyCode;
+
+				// Bail on special keys.
+				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
+				} else if ( ( key >= 91 && key <= 93 ) || ( key >= 112 && key <= 123 ) || key === 144 || key === 145 ) {
+					return;
+				}
 
-			setTimeout( function() {
-				editor.execCommand( 'wpAutoResize' );
-				adjust();
-			}, 300 );
-		}
+				mceScroll( key );
+			}
 
-		function mceHide() {
-			$window.off( 'scroll.mce-float-panels' );
+			function mceScroll( key ) {
+				var offset = mceGetCursorOffset(),
+					buffer = 50,
+					cursorTop, cursorBottom, editorTop, editorBottom;
 
-			setTimeout( function() {
-				var top = $contentWrap.offset().top;
+				if ( ! offset ) {
+					return;
+				}
 
-				if ( window.pageYOffset > top ) {
-					window.scrollTo( window.pageXOffset, top - heights.adminBarHeight );
+				cursorTop = offset.top + editor.iframeElement.getBoundingClientRect().top;
+				cursorBottom = cursorTop + offset.height;
+				cursorTop = cursorTop - buffer;
+				cursorBottom = cursorBottom + buffer;
+				editorTop = heights.adminBarHeight + heights.toolsHeight + heights.menuBarHeight + heights.visualTopHeight;
+				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;
 				}
 
-				textEditorResize();
-				adjust();
-			}, 100 );
+				if ( cursorTop < editorTop && ( key === VK.UP || key === VK.LEFT || key === VK.BACKSPACE ) ) {
+					window.scrollTo( window.pageXOffset, cursorTop + window.pageYOffset - editorTop );
+				} else if ( cursorBottom > editorBottom ) {
+					window.scrollTo( window.pageXOffset, cursorBottom + window.pageYOffset - editorBottom );
+				}
+			}
 
-			adjust();
-		}
+			// Adjust when switching editor modes.
+			function mceShow() {
+				$window.on( 'scroll.mce-float-panels', hideFloatPanels );
 
-		mceBind = function() {
-			editor.on( 'keyup', mceKeyup );
-			editor.on( 'show', mceShow );
-			editor.on( 'hide', mceHide );
-			// Adjust when the editor resizes.
-			editor.on( 'setcontent wp-autoresize wp-toolbar-toggle', adjust );
-			// Scroll to the caret or selection after undo/redo
-			editor.on( 'undo redo', mceScroll );
+				setTimeout( function() {
+					editor.execCommand( 'wpAutoResize' );
+					adjust();
+				}, 300 );
+			}
 
-			$window.off( 'scroll.mce-float-panels' ).on( 'scroll.mce-float-panels', hideFloatPanels );
-		};
+			function mceHide() {
+				$window.off( 'scroll.mce-float-panels' );
 
-		mceUnbind = function() {
-			editor.off( 'keyup', mceKeyup );
-			editor.off( 'show', mceShow );
-			editor.off( 'hide', mceHide );
-			editor.off( 'setcontent wp-autoresize wp-toolbar-toggle', adjust );
-			editor.off( 'undo redo', mceScroll );
+				setTimeout( function() {
+					var top = $contentWrap.offset().top;
 
-			$window.off( 'scroll.mce-float-panels' );
-		};
+					if ( window.pageYOffset > top ) {
+						window.scrollTo( window.pageXOffset, top - heights.adminBarHeight );
+					}
 
-		if ( $wrap.hasClass( 'wp-editor-expand' ) ) {
-			// Adjust "immediately"
-			mceBind();
-			initialResize( adjust );
-		}
-	} );
+					textEditorResize();
+					adjust();
+				}, 100 );
 
-	// Adjust the toolbars based on the active editor mode.
-	function adjust( type ) {
-		// Make sure we're not in fullscreen mode.
-		if ( fullscreen && fullscreen.settings.visible ) {
-			return;
-		}
-
-		var windowPos = $window.scrollTop(),
-			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 ( resize || ! heights.windowHeight ) {
-			getHeights();
-		}
+				adjust();
+			}
 
-		if ( ! visual && type === 'resize' ) {
-			textEditorResize();
-		}
+			function toggleAdvanced() {
+				advanced = ! advanced;
+			}
 
-		if ( visual ) {
-			$top = $visualTop;
-			$editor = $visualEditor;
-			topHeight = heights.visualTopHeight;
-		} else {
-			$top = $textTop;
-			$editor = $textEditor;
-			topHeight = heights.textTopHeight;
-		}
-
-		topPos = $top.parent().offset().top;
-		editorPos = $editor.offset().top;
-		editorHeight = $editor.outerHeight();
-
-		// Should we pin?
-		canPin = visual ? autoresizeMinHeight + topHeight : autoresizeMinHeight + 20; // 20px from textarea padding
-		canPin = editorHeight > ( canPin + 5 );
+			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 );
+
+				$window.off( 'scroll.mce-float-panels' ).on( 'scroll.mce-float-panels', hideFloatPanels );
+			};
+
+			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 );
+
+				$window.off( 'scroll.mce-float-panels' );
+			};
+
+			if ( $wrap.hasClass( 'wp-editor-expand' ) ) {
+				// Adjust "immediately"
+				mceBind();
+				initialResize( adjust );
+			}
+		} );
 
-		if ( ! canPin ) {
-			if ( resize ) {
-				$tools.css( {
-					position: 'absolute',
-					top: 0,
-					width: contentWrapWidth
-				} );
+		// Adjust the toolbars based on the active editor mode.
+		function adjust( event ) {
+			var type = event && event.type;
 
-				if ( visual && $menuBar.length ) {
-					$menuBar.css( {
-						position: 'absolute',
-						top: 0,
-						width: contentWrapWidth - ( borderWidth * 2 )
-					} );
-				}
+			// Make sure we're not in fullscreen mode.
+			if ( fullscreen && fullscreen.settings.visible ) {
+				return;
+			}
 
-				$top.css( {
-					position: 'absolute',
-					top: heights.menuBarHeight,
-					width: contentWrapWidth - ( borderWidth * 2 ) - ( visual ? 0 : ( $top.outerWidth() - $top.width() ) )
-				} );
+			var windowPos = $window.scrollTop(),
+				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 ( resize || ! heights.windowHeight ) {
+				getHeights();
+			}
 
-				$statusBar.add( $bottom ).attr( 'style', '' );
+			if ( ! visual && type === 'resize' ) {
+				textEditorResize();
 			}
-		} else {
-			// Maybe pin the top.
-			if ( ( ! fixedTop || resize ) &&
-				// Handle scrolling down.
-				( windowPos >= ( topPos - heights.toolsHeight - heights.adminBarHeight ) &&
-				// Handle scrolling up.
-				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() ) )
-					} );
-				}
+			if ( visual ) {
+				$top = $visualTop;
+				$editor = $visualEditor;
+				topHeight = heights.visualTopHeight;
+			} else {
+				$top = $textTop;
+				$editor = $textEditor;
+				topHeight = heights.textTopHeight;
+			}
 
-				$top.css( {
-					position: 'fixed',
-					top: heights.adminBarHeight + heights.toolsHeight + heights.menuBarHeight,
-					width: contentWrapWidth - ( borderWidth * 2 ) - ( visual ? 0 : ( $top.outerWidth() - $top.width() ) )
-				} );
-			// Maybe unpin the top.
-			} else if ( fixedTop || resize ) {
-				// Handle scrolling up.
-				if ( windowPos <= ( topPos - heights.toolsHeight - heights.adminBarHeight ) ) {
-					fixedTop = false;
+			topPos = $top.parent().offset().top;
+			editorPos = $editor.offset().top;
+			editorHeight = $editor.outerHeight();
+
+			// Should we pin?
+			canPin = visual ? autoresizeMinHeight + topHeight : autoresizeMinHeight + 20; // 20px from textarea padding
+			canPin = editorHeight > ( canPin + 5 );
 
+			if ( ! canPin ) {
+				if ( resize ) {
 					$tools.css( {
 						position: 'absolute',
 						top: 0,
@@ -423,311 +371,796 @@
 						top: heights.menuBarHeight,
 						width: contentWrapWidth - ( borderWidth * 2 ) - ( visual ? 0 : ( $top.outerWidth() - $top.width() ) )
 					} );
-				// Handle scrolling down.
-				} else if ( windowPos >= ( topPos - heights.toolsHeight - heights.adminBarHeight + editorHeight - buffer ) ) {
-					fixedTop = false;
+
+					$statusBar.add( $bottom ).attr( 'style', '' );
+				}
+			} else {
+				// Maybe pin the top.
+				if ( ( ! fixedTop || resize ) &&
+					// Handle scrolling down.
+					( windowPos >= ( topPos - heights.toolsHeight - heights.adminBarHeight ) &&
+					// Handle scrolling up.
+					windowPos <= ( topPos - heights.toolsHeight - heights.adminBarHeight + editorHeight - buffer ) ) ) {
+					fixedTop = true;
 
 					$tools.css( {
-						position: 'absolute',
-						top: editorHeight - buffer,
+						position: 'fixed',
+						top: heights.adminBarHeight,
 						width: contentWrapWidth
 					} );
 
 					if ( visual && $menuBar.length ) {
 						$menuBar.css( {
-							position: 'absolute',
-							top: editorHeight - buffer,
-							width: contentWrapWidth - ( borderWidth * 2 )
+							position: 'fixed',
+							top: heights.adminBarHeight + heights.toolsHeight,
+							width: contentWrapWidth - ( borderWidth * 2 ) - ( visual ? 0 : ( $top.outerWidth() - $top.width() ) )
 						} );
 					}
 
 					$top.css( {
-						position: 'absolute',
-						top: editorHeight - buffer + heights.menuBarHeight,
+						position: 'fixed',
+						top: heights.adminBarHeight + heights.toolsHeight + heights.menuBarHeight,
 						width: contentWrapWidth - ( borderWidth * 2 ) - ( visual ? 0 : ( $top.outerWidth() - $top.width() ) )
 					} );
-				}
-			}
-
-			// Maybe adjust the bottom bar.
-			if ( ( ! fixedBottom || resize ) &&
-				// +[n] for the border around the .wp-editor-container.
-				( windowPos + heights.windowHeight ) <= ( editorPos + editorHeight + heights.bottomHeight + heights.statusBarHeight + borderWidth ) ) {
-				fixedBottom = true;
-
-				$statusBar.css( {
-					position: 'fixed',
-					bottom: heights.bottomHeight,
-					width: contentWrapWidth - ( borderWidth * 2 )
-				} );
+				// Maybe unpin the top.
+				} else if ( fixedTop || resize ) {
+					// Handle scrolling up.
+					if ( windowPos <= ( topPos - heights.toolsHeight - heights.adminBarHeight ) ) {
+						fixedTop = false;
 
-				$bottom.css( {
-					position: 'fixed',
-					bottom: 0,
-					width: contentWrapWidth
-				} );
-			} else if ( ( fixedBottom || resize ) &&
-					( windowPos + heights.windowHeight ) > ( editorPos + editorHeight + heights.bottomHeight + heights.statusBarHeight - borderWidth ) ) {
-				fixedBottom = false;
+						$tools.css( {
+							position: 'absolute',
+							top: 0,
+							width: contentWrapWidth
+						} );
 
-				$statusBar.add( $bottom ).attr( 'style', '' );
-			}
-		}
+						if ( visual && $menuBar.length ) {
+							$menuBar.css( {
+								position: 'absolute',
+								top: 0,
+								width: contentWrapWidth - ( borderWidth * 2 )
+							} );
+						}
 
-		// Sidebar pinning
-		if ( $postboxContainer.width() < 300 && heights.windowWidth > 600 && // sidebar position is changed with @media from CSS, make sure it is on the side
-			$document.height() > ( $sideSortables.height() + postBodyTop + 120 ) && // the sidebar is not the tallest element
-			heights.windowHeight < editorHeight ) { // the editor is taller than the viewport
+						$top.css( {
+							position: 'absolute',
+							top: heights.menuBarHeight,
+							width: contentWrapWidth - ( borderWidth * 2 ) - ( visual ? 0 : ( $top.outerWidth() - $top.width() ) )
+						} );
+					// Handle scrolling down.
+					} else if ( windowPos >= ( topPos - heights.toolsHeight - heights.adminBarHeight + editorHeight - buffer ) ) {
+						fixedTop = false;
 
-			if ( ( heights.sideSortablesHeight + pinnedToolsTop + sidebarBottom ) > heights.windowHeight || fixedSideTop || fixedSideBottom ) {
-				// Reset when scrolling to the top
-				if ( windowPos + pinnedToolsTop <= postBodyTop ) {
-					$sideSortables.attr( 'style', '' );
-					fixedSideTop = fixedSideBottom = false;
-				} else {
-					if ( windowPos > lastScrollPosition ) {
-						// Scrolling down
-						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;
-							}
+						$tools.css( {
+							position: 'absolute',
+							top: editorHeight - buffer,
+							width: contentWrapWidth
+						} );
 
-							$sideSortables.css({
+						if ( visual && $menuBar.length ) {
+							$menuBar.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
-							});
+								top: editorHeight - buffer,
+								width: contentWrapWidth - ( borderWidth * 2 )
+							} );
 						}
-					} else if ( windowPos < lastScrollPosition ) {
-						// Scrolling up
-						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: ''
-							});
+						$top.css( {
+							position: 'absolute',
+							top: editorHeight - buffer + heights.menuBarHeight,
+							width: contentWrapWidth - ( borderWidth * 2 ) - ( visual ? 0 : ( $top.outerWidth() - $top.width() ) )
+						} );
+					}
+				}
+
+				// Maybe adjust the bottom bar.
+				if ( ( ! fixedBottom || ( resize && advanced ) ) &&
+						// +[n] for the border around the .wp-editor-container.
+						( windowPos + heights.windowHeight ) <= ( editorPos + editorHeight + heights.bottomHeight + heights.statusBarHeight + borderWidth ) ) {
+
+					if ( event && event.deltaHeight > 0 ) {
+						window.scrollBy( 0, event.deltaHeight );
+					} else if ( 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.add( $bottom ).attr( 'style', '' );
+
+					! advanced && $statusBar.css( 'visibility', 'hidden' );
+				}
+			}
+
+			// Sidebar pinning
+			if ( $postboxContainer.width() < 300 && heights.windowWidth > 600 && // sidebar position is changed with @media from CSS, make sure it is on the side
+				$document.height() > ( $sideSortables.height() + postBodyTop + 120 ) && // the sidebar is not the tallest element
+				heights.windowHeight < editorHeight ) { // the editor is taller than the viewport
+
+				if ( ( heights.sideSortablesHeight + pinnedToolsTop + sidebarBottom ) > heights.windowHeight || fixedSideTop || fixedSideBottom ) {
+					// Reset when scrolling to the top
+					if ( windowPos + pinnedToolsTop <= postBodyTop ) {
+						$sideSortables.attr( 'style', '' );
+						fixedSideTop = fixedSideBottom = false;
+					} else {
+						if ( windowPos > lastScrollPosition ) {
+							// Scrolling down
+							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
+								});
+							}
+						} else if ( windowPos < lastScrollPosition ) {
+							// Scrolling up
+							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 {
-				// if the sidebar container is smaller than the viewport, then pin/unpin the top when scrolling
-				if ( windowPos >= ( postBodyTop - pinnedToolsTop ) ) {
+				$sideSortables.attr( 'style', '' );
+				fixedSideTop = fixedSideBottom = false;
+			}
 
-					$sideSortables.css( {
-						position: 'fixed',
-						top: pinnedToolsTop
+			if ( resize ) {
+				$contentWrap.css( {
+					paddingTop: heights.toolsHeight
+				} );
+
+				if ( visual ) {
+					$visualEditor.css( {
+						paddingTop: heights.visualTopHeight + heights.menuBarHeight
 					} );
 				} else {
-					$sideSortables.attr( 'style', '' );
+					$textEditor.css( {
+						marginTop: heights.textTopHeight
+					} );
+
+					$textEditorClone.width( contentWrapWidth - 20 - ( borderWidth * 2 ) );
 				}
+			}
+		}
 
-				fixedSideTop = fixedSideBottom = false;
+		function fullscreenHide() {
+			textEditorResize();
+			adjust();
+		}
+
+		function initialResize( callback ) {
+			for ( var i = 1; i < 6; i++ ) {
+				setTimeout( callback, 500 * i );
 			}
+		}
 
-			lastScrollPosition = windowPos;
-		} else {
-			$sideSortables.attr( 'style', '' );
-			fixedSideTop = fixedSideBottom = false;
+		function afterScroll() {
+			clearTimeout( scrollTimer );
+			scrollTimer = setTimeout( adjust, 100 );
 		}
 
-		if ( resize ) {
-			$contentWrap.css( {
-				paddingTop: heights.toolsHeight
+		function on() {
+			// Scroll to the top when triggering this from JS.
+			// Ensures 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();
 			} );
 
-			if ( visual ) {
-				$visualEditor.css( {
-					paddingTop: heights.visualTopHeight + heights.menuBarHeight
-				} );
-			} else {
-				$textEditor.css( {
-					marginTop: heights.textTopHeight
-				} );
+			// Adjust when collapsing the menu, changing the columns, 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', function() {
+					if ( ! fixedSideTop && ! fixedSideBottom && window.pageYOffset > pinnedToolsTop ) {
+						fixedSideBottom = true;
+						window.scrollBy( 0, -1 );
+						adjust();
+						window.scrollBy( 0, 1 );
+					}
 
-				$textEditorClone.width( contentWrapWidth - 20 - ( borderWidth * 2 ) );
+					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 );
+			$textEditor.on( 'keyup.editor-expand', textEditorKeyup );
+			mceBind();
+
+			// Adjust when entering/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' );
 		}
-	}
 
-	function fullscreenHide() {
-		textEditorResize();
-		adjust();
-	}
+		function off() {
+			var height = window.getUserSetting('ed_size');
+
+			// Scroll to the top when triggering this from JS.
+			// Ensures 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/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;
 
-	function initialResize( callback ) {
-		for ( var i = 1; i < 6; i++ ) {
-			setTimeout( callback, 500 * i );
+			if ( mceEditor ) {
+				mceEditor.settings.wp_autoresize_on = false;
+				mceEditor.execCommand( 'wpAutoResizeOff' );
+
+				if ( ! mceEditor.isHidden() ) {
+					$textEditor.hide();
+
+					if ( height ) {
+						mceEditor.theme.resizeTo( null, height );
+					}
+				}
+			}
+
+			if ( height ) {
+				$textEditor.height( height );
+			}
+
+			$document.trigger( 'editor-expand-off' );
 		}
-	}
 
-	function afterScroll() {
-		clearTimeout( scrollTimer );
-		scrollTimer = setTimeout( adjust, 100 );
-	}
+		// Start on load
+		if ( $wrap.hasClass( 'wp-editor-expand' ) ) {
+			on();
 
-	function on() {
-		// Scroll to the top when triggering this from JS.
-		// Ensures toolbars are pinned properly.
-		if ( window.pageYOffset && window.pageYOffset > pageYOffsetAtTop ) {
-			window.scrollTo( window.pageXOffset, 0 );
+			// Ideally we need to resize just after CSS has fully loaded and QuickTags is ready.
+			if ( $contentWrap.hasClass( 'html-active' ) ) {
+				initialResize( function() {
+					adjust();
+					textEditorResize();
+				} );
+			}
 		}
 
-		$wrap.addClass( 'wp-editor-expand' );
+		// 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' );
+			}
+		});
 
-		// Adjust when the window is scrolled or resized.
-		$window.on( 'scroll.editor-expand resize.editor-expand', function( event ) {
-			adjust( event.type );
-			afterScroll();
+		// Expose on() and off()
+		window.editorExpand = {
+			on: on,
+			off: off
+		};
+	} );
+
+	/* DFW. */
+	$( 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 = $(),
+			mceBind = function() {},
+			mceUnbind = function() {},
+			dfw = window.getUserSetting( 'dfw' ),
+			_isActive = window.getUserSetting( 'editor_expand' ) === 'on',
+			_isOn = _isActive ? dfw ? !! parseInt( dfw, 10 ) : true : false,
+			traveledX = 0,
+			traveledY = 0,
+			buffer = 20,
+			faded, fadedAdminBar, fadedSlug,
+			editorRect, x, y, mouseY, scrollY, button,
+			focusLostTimer, overlayTimer, editorHasFocus;
+
+		$body.append( $overlay );
+
+		$overlay.css( {
+			display: 'none',
+			position: 'fixed',
+			top: $adminBar.height(),
+			right: 0,
+			bottom: 0,
+			left: 0,
+			'z-index': 9997
 		} );
 
-		// Adjust when collapsing the menu, changing the columns, 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', function() {
-				if ( ! fixedSideTop && ! fixedSideBottom && window.pageYOffset > pinnedToolsTop ) {
-					fixedSideBottom = true;
-					window.scrollBy( 0, -1 );
-					adjust();
-					window.scrollBy( 0, 1 );
-				}
+		$editor.css( {
+			position: 'relative'
+		} );
 
-				adjust();
-			}).on( 'wp-window-resized.editor-expand', function() {
-				if ( mceEditor && ! mceEditor.isHidden() ) {
-					mceEditor.execCommand( 'wpAutoResize' );
-				} else {
-					textEditorResize();
-				}
-			});
+		$window.on( 'mousemove.focus', function( event ) {
+			mouseY = event.pageY;
+		} );
+
+		function activate() {
+			if ( ! _isActive ) {
+				_isActive = true;
 
-		$textEditor.on( 'focus.editor-expand input.editor-expand propertychange.editor-expand', textEditorResize );
-		$textEditor.on( 'keyup.editor-expand', textEditorKeyup );
-		mceBind();
+				button.disabled( false );
+			}
+		}
 
-		// Adjust when entering/exiting fullscreen mode.
-		fullscreen && fullscreen.pubsub.subscribe( 'hidden', fullscreenHide );
+		function deactivate() {
+			if ( _isActive ) {
+				off();
 
-		if ( mceEditor ) {
-			mceEditor.settings.wp_autoresize_on = true;
-			mceEditor.execCommand( 'wpAutoResizeOn' );
+				_isActive = false;
 
-			if ( ! mceEditor.isHidden() ) {
-				mceEditor.execCommand( 'wpAutoResize' );
+				button.disabled( true );
 			}
 		}
 
-		if ( ! mceEditor || mceEditor.isHidden() ) {
-			textEditorResize();
+		function isActive() {
+			return _isActive;
 		}
 
-		adjust();
-	}
+		function on() {
+			if ( ! _isOn && _isActive ) {
+				_isOn = true;
+
+				mceBind();
+
+				$content.on( 'keydown.focus', fadeOut );
 
-	function off() {
-		var height = window.getUserSetting('ed_size');
+				$title.add( $content ).on( 'blur.focus', maybeFadeIn );
 
-		// Scroll to the top when triggering this from JS.
-		// Ensures toolbars are reset properly.
-		if ( window.pageYOffset && window.pageYOffset > pageYOffsetAtTop ) {
-			window.scrollTo( window.pageXOffset, 0 );
+				fadeOut();
+
+				window.setUserSetting( 'dfw', '1' );
+			}
 		}
 
-		$wrap.removeClass( 'wp-editor-expand' );
+		function off() {
+			if ( _isOn ) {
+				_isOn = false;
 
-		$window.off( '.editor-expand' );
-		$document.off( '.editor-expand' );
-		$textEditor.off( '.editor-expand' );
-		mceUnbind();
+				mceUnbind();
 
-		// Adjust when entering/exiting fullscreen mode.
-		fullscreen && fullscreen.pubsub.unsubscribe( 'hidden', fullscreenHide );
+				$title.add( $content ).off( '.focus' );
 
-		// Reset all css
-		$.each( [ $visualTop, $textTop, $tools, $menuBar, $bottom, $statusBar, $contentWrap, $visualEditor, $textEditor, $sideSortables ], function( i, element ) {
-			element && element.attr( 'style', '' );
-		});
+				fadeIn();
 
-		fixedTop = fixedBottom = fixedSideTop = fixedSideBottom = false;
+				$editor.off( '.focus' );
 
-		if ( mceEditor ) {
-			mceEditor.settings.wp_autoresize_on = false;
-			mceEditor.execCommand( 'wpAutoResizeOff' );
+				window.setUserSetting( 'dfw', '0' );
+			}
+		}
 
-			if ( ! mceEditor.isHidden() ) {
-				$textEditor.hide();
+		function toggle() {
+			( _isOn ? off : on )();
+		}
 
-				if ( height ) {
-					mceEditor.theme.resizeTo( null, height );
+		function isOn() {
+			return _isOn;
+		}
+
+		function fadeOut( event ) {
+			var key = event && event.keyCode;
+
+			if ( key === 27 ) {
+				fadeIn();
+				return;
+			}
+
+			if ( event && ( event.metaKey || ( event.ctrlKey && ! event.altKey ) || ( 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 entering the overlay with the mouse.
+					.on( 'mouseenter.focus', function() {
+						editorRect = $editor.offset();
+						editorRect.right = editorRect.left + $editor.outerWidth();
+						editorRect.bottom = editorRect.top + $editor.outerHeight();
+
+						$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.pageX,
+							ny = event.pageY;
+
+						if ( x && y && ( nx !== x || ny !== y ) ) {
+							if (
+								( ny <= y && ny < editorRect.top ) ||
+								( ny >= y && ny > editorRect.bottom ) ||
+								( nx <= x && nx < editorRect.left ) ||
+								( nx >= x && nx > editorRect.right )
+							) {
+								traveledX += Math.abs( x - nx );
+								traveledY += Math.abs( y - ny );
+
+								if ( (
+									ny <= editorRect.top - buffer ||
+									ny >= editorRect.bottom + buffer ||
+									nx <= editorRect.left - buffer ||
+									nx >= editorRect.right + buffer
+								) && (
+									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, always fade in and cancel the event.
+					.on( 'touchstart.focus', function( event ) {
+						event.preventDefault();
+						fadeIn();
+					} );
+
+				$editor.off( 'mouseenter.focus' );
+
+				if ( focusLostTimer ) {
+					clearTimeout( focusLostTimer );
+					focusLostTimer = null;
 				}
+
+				$menuWrap.off( 'mouseenter.focus' );
+
+				$body.addClass( 'focus-on' ).removeClass( 'focus-off' );
 			}
+
+			fadeOutAdminBar();
+			fadeOutSlug();
 		}
 
-		if ( height ) {
-			$textEditor.height( height );
+		function fadeIn() {
+			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' );
+
+				$editor.on( 'mouseenter.focus', function() {
+					if ( $.contains( $editor.get( 0 ), document.activeElement ) || editorHasFocus ) {
+						fadeOut();
+					}
+				} );
+
+				focusLostTimer = setTimeout( function() {
+					focusLostTimer = null;
+					$editor.off( 'mouseenter.focus' );
+				}, 1000 );
+
+				$menuWrap.on( 'mouseenter.focus', function() {
+					if ( focusLostTimer ) {
+						clearTimeout( focusLostTimer );
+						focusLostTimer = null;
+					}
+
+					$editor.off( 'mouseenter.focus' );
+				} );
+
+				$body.addClass( 'focus-off' ).removeClass( 'focus-on' );
+			}
+
+			fadeInAdminBar();
+			fadeInSlug();
 		}
-	}
 
-	// Start on load
-	if ( $wrap.hasClass( 'wp-editor-expand' ) ) {
-		on();
+		function maybeFadeIn() {
+			setTimeout( function() {
+				var position = document.activeElement.compareDocumentPosition( $editor.get( 0 ) );
 
-		// Ideally we need to resize just after CSS has fully loaded and QuickTags is ready.
-		if ( $contentWrap.hasClass( 'html-active' ) ) {
-			initialResize( function() {
-				adjust();
-				textEditorResize();
+				function hasFocus( $el ) {
+					return $.contains( $el.get( 0 ), document.activeElement );
+				}
+
+				// The focussed node is before or behind the editor area, and not ouside the wrap.
+				if ( ( position === 2 || position === 4 ) && ( hasFocus( $menuWrap ) || hasFocus( $wrap ) || hasFocus( $footer ) ) ) {
+					fadeIn();
+				}
+			}, 0 );
+		}
+
+		function fadeOutAdminBar() {
+			if ( ! fadedAdminBar && faded ) {
+				fadedAdminBar = true;
+
+				$adminBar
+					.on( 'mouseenter.focus', function() {
+						$adminBar.addClass( 'focus-off' );
+					} )
+					.on( 'mouseleave.focus', function() {
+						$adminBar.removeClass( 'focus-off' );
+					} );
+			}
+		}
+
+		function fadeInAdminBar() {
+			if ( fadedAdminBar ) {
+				fadedAdminBar = false;
+
+				$adminBar.off( '.focus' );
+			}
+		}
+
+		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' );
+			}
+		}
+
+		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' );
+			}
+		}
+
+		$document.on( 'tinymce-editor-setup.focus', function( event, editor ) {
+			editor.addButton( 'dfw', {
+				classes: 'wp-dfw btn widget',
+				disabled: ! _isActive,
+				onclick: toggle,
+				onPostRender: function() {
+					button = this;
+				},
+				tooltip: 'Distraction Free Writing'
 			} );
+		} );
+
+		$document.on( 'tinymce-editor-init.focus', function( event, editor ) {
+			function focus() {
+				editorHasFocus = true;
+			}
+
+			function blur() {
+				editorHasFocus = false;
+			}
+
+			if ( editor.id === 'content' ) {
+				$editorWindow = $( editor.getWin() );
+				$editorIframe = $( editor.getContentAreaContainer() ).find( 'iframe' );
+
+				mceBind = function() {
+					button.active( true );
+					editor.on( 'keydown', fadeOut );
+					editor.on( 'blur', maybeFadeIn );
+					editor.on( 'focus', focus );
+					editor.on( 'blur', blur );
+				};
+
+				mceUnbind = function() {
+					button.active( false );
+					editor.off( 'keydown', fadeOut );
+					editor.off( 'blur', maybeFadeIn );
+					editor.off( 'focus', focus );
+					editor.off( 'blur', blur );
+				};
+
+				if ( _isOn ) {
+					mceBind();
+				}
+
+				// Make sure the body focusses when clicking outside it.
+				editor.on( 'click', function( event ) {
+					if ( event.target === editor.getDoc().documentElement ) {
+						editor.focus();
+					}
+				} );
+			}
+		} );
+
+		$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 );
 		}
-	}
 
-	// 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
-	};
-});
+		$( '#save-post' ).on( 'click', function( event ) {
+			var wp;
+
+			if ( ( wp = window.wp ) && wp.autosave ) {
+				wp.autosave.server.triggerSave();
+				event.preventDefault();
+			}
+		} );
+
+		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 );
Index: src/wp-includes/class-wp-editor.php
===================================================================
--- src/wp-includes/class-wp-editor.php	(revision 30177)
+++ src/wp-includes/class-wp-editor.php	(working copy)
@@ -278,6 +278,9 @@
 			if ( $set['dfw'] )
 				$qtInit['buttons'] .= ',fullscreen';
 
+			if ( $editor_id === 'content' )
+				$qtInit['buttons'] .= ',dfw';
+
 			/**
 			 * Filter the Quicktags settings.
 			 *
@@ -546,6 +549,13 @@
 				$mce_buttons = apply_filters( 'teeny_mce_buttons', array('bold', 'italic', 'underline', 'blockquote', 'strikethrough', 'bullist', 'numlist', 'alignleft', 'aligncenter', 'alignright', 'undo', 'redo', 'link', 'unlink', 'fullscreen'), $editor_id );
 				$mce_buttons_2 = $mce_buttons_3 = $mce_buttons_4 = array();
 			} else {
+				$mce_buttons = array( 'bold', 'italic', 'strikethrough', 'bullist', 'numlist', 'blockquote', 'hr', 'alignleft', 'aligncenter', 'alignright', 'link', 'unlink', 'wp_more', 'spellchecker', 'wp_adv' );
+
+				if ( $editor_id ) {
+					$mce_buttons[] = 'dfw';
+				} else {
+					$mce_buttons[] = 'fullscreen';
+				}
 
 				/**
 				 * Filter the first-row list of TinyMCE buttons (Visual tab).
@@ -555,7 +565,7 @@
 				 * @param array  $buttons   First-row list of buttons.
 				 * @param string $editor_id Unique editor identifier, e.g. 'content'.
 				 */
-				$mce_buttons = apply_filters( 'mce_buttons', array('bold', 'italic', 'strikethrough', 'bullist', 'numlist', 'blockquote', 'hr', 'alignleft', 'aligncenter', 'alignright', 'link', 'unlink', 'wp_more', 'spellchecker', 'fullscreen', 'wp_adv' ), $editor_id );
+				$mce_buttons = apply_filters( 'mce_buttons', $mce_buttons, $editor_id );
 
 				/**
 				 * Filter the second-row list of TinyMCE buttons (Visual tab).
Index: src/wp-includes/css/editor.css
===================================================================
--- src/wp-includes/css/editor.css	(revision 30177)
+++ src/wp-includes/css/editor.css	(working copy)
@@ -183,7 +183,7 @@
 }
 
 .mce-toolbar .mce-btn,
-.qt-fullscreen {
+.qt-dfw {
 	border-color: transparent;
 	background: transparent;
 	-webkit-box-shadow: none;
@@ -194,7 +194,7 @@
 
 #wp-fullscreen-buttons .mce-btn,
 .mce-toolbar .mce-btn-group .mce-btn,
-.qt-fullscreen {
+.qt-dfw {
 	border: 1px solid transparent;
 	margin: 2px;
 	background-image: none;
@@ -208,19 +208,21 @@
 .mce-toolbar .mce-btn-group .mce-btn:hover,
 #wp-fullscreen-buttons .mce-btn:focus,
 .mce-toolbar .mce-btn-group .mce-btn:focus,
-.qt-fullscreen:hover,
-.qt-fullscreen:focus {
+.qt-dfw:hover,
+.qt-dfw:focus {
 	background: #fafafa;
 	border-color: #999;
 	color: #222;
 	-webkit-box-shadow: inset 0 1px 0 #fff, 0 1px 0 rgba( 0, 0, 0, 0.08 );
 	box-shadow: inset 0 1px 0 #fff, 0 1px 0 rgba( 0, 0, 0, 0.08 );
+	outline: none;
 }
 
 .mce-toolbar .mce-btn-group .mce-btn.mce-active,
 #wp-fullscreen-buttons .mce-btn.mce-active,
 .mce-toolbar .mce-btn-group .mce-btn:active,
-#wp-fullscreen-buttons .mce-btn:active {
+#wp-fullscreen-buttons .mce-btn:active,
+.qt-dfw.active {
 	background: #ebebeb;
 	border-color: #999;
 	-webkit-box-shadow: inset 0 2px 5px -3px rgba( 0, 0, 0, 0.3 );
@@ -253,7 +255,7 @@
 }
 
 .mce-toolbar .mce-btn button,
-.qt-fullscreen {
+.qt-dfw {
 	padding: 2px 3px;
 	line-height: normal;
 }
@@ -568,7 +570,7 @@
 	padding: 0;
 }
 
-.qt-fullscreen {
+.qt-dfw {
 	color: #777;
 	line-height: 20px;
 	width: 28px;
@@ -602,6 +604,7 @@
 i.mce-i-spellchecker,
 i.mce-i-fullscreen,
 i.mce-i-wp_fullscreen,
+i.mce-i-dfw,
 i.mce-i-wp_adv,
 i.mce-i-underline,
 i.mce-i-alignjustify,
@@ -632,7 +635,7 @@
 	padding-right: 2px;
 }
 
-.qt-fullscreen {
+.qt-dfw {
 	font: normal 20px/1 'dashicons';
 	vertical-align: top;
 	speak: none;
@@ -694,7 +697,8 @@
 
 i.mce-i-fullscreen:before,
 i.mce-i-wp_fullscreen:before,
-.qt-fullscreen:before {
+i.mce-i-dfw:before,
+.qt-dfw:before {
 	content: '\f211';
 }
 
@@ -970,8 +974,8 @@
 	font-weight: bold;
 }
 
-.mce-toolbar .mce-btn-group .mce-btn.mce-wp-fullscreen,
-.qt-fullscreen {
+.mce-toolbar .mce-btn-group .mce-btn.mce-wp-dfw,
+.qt-dfw {
 	position: absolute;
 	top: 0;
 	right: 0;
@@ -980,7 +984,7 @@
 
 @media screen and ( max-width: 782px ) {
 	.mce-toolbar .mce-btn button,
-	.qt-fullscreen {
+	.qt-dfw {
 		padding: 6px 7px;
 	}
 
@@ -989,12 +993,12 @@
 		margin: 1px;
 	}
 
-	.qt-fullscreen {
+	.qt-dfw {
 		width: 36px;
 		height: 34px;
 	}
 
-	.mce-toolbar .mce-btn-group .mce-btn.mce-wp-fullscreen {
+	.mce-toolbar .mce-btn-group .mce-btn.mce-wp-dfw {
 		margin: 4px 4px 0 0;
 	}
 
@@ -2008,3 +2012,56 @@
 }
 
 /* TODO: DFW responsive */
+
+/* DFW 2
+-------------------------------------------------------------- */
+
+.focus-on .wrap > h2,
+.focus-on #wpfooter,
+.focus-on .postbox-container,
+.focus-on div.updated,
+.focus-on div.error,
+.focus-on #wp-toolbar {
+	opacity: 0;
+	transition-duration: 0.6s;
+	transition-property: opacity;
+	transition-timing-function: ease-in-out;
+}
+
+.focus-off .wrap > h2,
+.focus-off #wpfooter,
+.focus-off .postbox-container,
+.focus-off div.updated,
+.focus-off div.error,
+.focus-off #wp-toolbar {
+	opacity: 1;
+	transition-duration: 0.2s;
+	transition-property: opacity;
+	transition-timing-function: ease-in-out;
+}
+
+.focus-on #adminmenuback,
+.focus-on #adminmenuwrap,
+.focus-on .screen-meta-toggle {
+	transition-duration: 0.6s;
+	transition-property: transform;
+	transition-timing-function: ease-in-out;
+}
+
+.focus-on #adminmenuback,
+.focus-on #adminmenuwrap {
+	transform: translateX( -100% );
+}
+
+.focus-on .screen-meta-toggle {
+	transform: translateY( -100% );
+}
+
+.focus-off #adminmenuback,
+.focus-off #adminmenuwrap,
+.focus-off .screen-meta-toggle {
+	transform: translateX( 0 );
+	transition-duration: 0.2s;
+	transition-property: transform;
+	transition-timing-function: ease-in-out;
+}
Index: src/wp-includes/js/quicktags.js
===================================================================
--- src/wp-includes/js/quicktags.js	(revision 30177)
+++ src/wp-includes/js/quicktags.js	(working copy)
@@ -288,6 +288,10 @@
 				html += theButtons.fullscreen.html(name + '_');
 			}
 
+			if ( use && use.indexOf(',dfw,') !== -1 ) {
+				theButtons.dfw = new qt.DFWButton();
+				html += theButtons.dfw.html( name + '_' );
+			}
 
 			if ( 'rtl' === document.getElementsByTagName('html')[0].dir ) {
 				theButtons.textdirection = new qt.TextDirectionButton();
@@ -405,11 +409,17 @@
 		t.instance = instance || '';
 	};
 	qt.Button.prototype.html = function(idPrefix) {
-		var title = this.title ? ' title="' + this.title + '"' : '';
+		var title = this.title ? ' title="' + this.title + '"' : '',
+			active, wp;
 
 		if ( this.id === 'fullscreen' ) {
-			return '<button type="button" id="' + idPrefix + this.id + '" class="ed_button qt-fullscreen"' + title + '></button>';
+			return '<button type="button" id="' + idPrefix + this.id + '" class="ed_button qt-dfw"' + title + '></button>';
+		} else if ( this.id === 'dfw' ) {
+			active = ( wp = window.wp ) && wp.editor && wp.editor.dfw && wp.editor.dfw.isActive() ? ' active' : '';
+
+			return '<button type="button" id="' + idPrefix + this.id + '" class="ed_button qt-dfw' + active + '"' + title + '></button>';
 		}
+
 		return '<input type="button" id="' + idPrefix + this.id + '" class="ed_button button button-small"' + title + ' value="' + this.display + '" />';
 	};
 	qt.Button.prototype.callback = function(){};
@@ -619,6 +629,24 @@
 		wp.editor.fullscreen.on();
 	};
 
+	qt.DFWButton = function() {
+		qt.Button.call( this, 'dfw', '', 'f', quicktagsL10n.dfw );
+	};
+	qt.DFWButton.prototype = new qt.Button();
+	qt.DFWButton.prototype.callback = function( button ) {
+		var wp;
+
+		if ( ! ( wp = window.wp ) || ! wp.editor || ! wp.editor.dfw ) {
+			return;
+		}
+
+		if ( window.jQuery ) {
+			window.jQuery( button ).toggleClass( 'active' );
+		}
+
+		window.wp.editor.dfw.toggle();
+	};
+
 	qt.TextDirectionButton = function() {
 		qt.Button.call(this, 'textdirection', quicktagsL10n.textdirection, '', quicktagsL10n.toggleTextdirection);
 	};
Index: src/wp-includes/js/tinymce/plugins/wordpress/plugin.js
===================================================================
--- src/wp-includes/js/tinymce/plugins/wordpress/plugin.js	(revision 30177)
+++ src/wp-includes/js/tinymce/plugins/wordpress/plugin.js	(working copy)
@@ -7,6 +7,10 @@
 	var DOM = tinymce.DOM, wpAdvButton, modKey, style,
 		last = 0;
 
+	if ( typeof window.jQuery !== 'undefined' ) {
+		window.jQuery( document ).triggerHandler( 'tinymce-editor-setup', [ editor ] );
+	}
+
 	function toggleToolbars( state ) {
 		var iframe, initial, toolbars,
 			pixels = 0;
Index: src/wp-includes/js/tinymce/plugins/wpfullscreen/plugin.js
===================================================================
--- src/wp-includes/js/tinymce/plugins/wpfullscreen/plugin.js	(revision 30177)
+++ src/wp-includes/js/tinymce/plugins/wpfullscreen/plugin.js	(working copy)
@@ -65,7 +65,7 @@
 		tooltip: 'Distraction Free Writing',
 		shortcut: 'Alt+Shift+W',
 		onclick: toggleFullscreen,
-		classes: 'wp-fullscreen btn widget' // This overwrites all classes on the container!
+		classes: 'wp-dfw btn widget' // This overwrites all classes on the container!
 	});
 
 	editor.addMenuItem( 'wp_fullscreen', {
Index: src/wp-includes/script-loader.php
===================================================================
--- src/wp-includes/script-loader.php	(revision 30177)
+++ src/wp-includes/script-loader.php	(working copy)
@@ -94,7 +94,8 @@
 		'fullscreen'            => __( 'fullscreen' ),
 		'toggleFullscreen'      => esc_attr__( 'Toggle fullscreen mode' ),
 		'textdirection'         => esc_attr__( 'text direction' ),
-		'toggleTextdirection'   => esc_attr__( 'Toggle Editor Text Direction' )
+		'toggleTextdirection'   => esc_attr__( 'Toggle Editor Text Direction' ),
+		'dfw'                   => esc_attr__( 'Distraction Free Writing' )
 	) );
 
 	$scripts->add( 'colorpicker', "/wp-includes/js/colorpicker$suffix.js", array('prototype'), '3517m' );
