Editor Chrome: Adding the editor mode switcher

 - Adding the `onChange` content handler
 - v1 of the editor header
 - Adding a v1 the text editor

editor/assets/stylesheets/main.scss

@@ -1,21 +1,28 @@
+@import './variables';
 @import '../../inserter/style';
+@import '../../editor/style';
 
 body.toplevel_page_gutenberg {
 	background: #fff;
+
+	#update-nag, .update-nag {
+		position: absolute;
+		right: 0;
+		top: 50px;
+	}
+
+	#wpcontent {
+		padding-left: 0;
+	}
 }
 
 .gutenberg {
-	margin: -20px 0 0 -20px;
-	padding: 60px;
-
 	* {
 		box-sizing: border-box;
 	}
 }
 
 .gutenberg__editor {
-	max-width: 700px;
-	margin: 0 auto;
 	position: relative;
 	img {
 		max-width: 100%;

editor/assets/stylesheets/variables.scss

@@ -0,0 +1,2 @@
+$gray: #575D65;
+$light-gray: #e0e5e9;

editor/editor/index.js

@@ -1,35 +1,18 @@
 /**
  * Internal dependencies
  */
-import EditorComponent from './editor';
+import EditorLayout from './layout';
 
 export default class Editor {
 	constructor( id, settings ) {
-		this.toggleInserter = this.toggleInserter.bind( this );
 		this.id = id;
 		this.settings = settings;
-		this.state = {
-			inserter: { opened: false },
-			blocks: wp.blocks.parse( settings.content )
-		};
-		console.log( this.state.blocks ); // eslint-disable-line no-console
 		this.render();
 	}
 
-	setState( newState ) {
-		this.state = Object.assign( {}, this.state, newState );
-		this.render();
-	}
-
-	toggleInserter() {
-		this.setState( {
-			inserter: { opened: ! this.state.inserter.opened }
-		} );
-	}
-
 	render() {
 		wp.element.render(
-			<EditorComponent state={ this.state} toggleInserter={ this.toggleInserter } />,
+			<EditorLayout content={ this.settings.content } />,
 			document.getElementById( this.id )
 		);
 	}

editor/editor/layout.js

@@ -0,0 +1,67 @@
+/**
+ * Internal dependencies
+ */
+import ModeSwitcher from './mode-switcher';
+import EditorText from './mode/text';
+import EditorVisual from './mode/visual';
+
+class Layout extends wp.element.Component {
+	constructor() {
+		super( ...arguments );
+		this.switchMode = this.switchMode.bind( this );
+		this.changeHtml = this.changeHtml.bind( this );
+		this.changeBlocks = this.changeBlocks.bind( this );
+		this.state = {
+			mode: 'visual',
+			html: '',
+			blocks: []
+		};
+	}
+
+	componentDidMount() {
+		this.setState( {
+			html: this.props.content,
+			blocks: wp.blocks.parse( this.props.content )
+		} );
+	}
+
+	switchMode( newMode ) {
+		// TODO: we need a serializer from blocks here
+		const html = this.state.html;
+		const blocks = this.mode === 'visual' ? this.state.blocks : wp.blocks.parse( this.state.html );
+		this.setState( {
+			mode: newMode,
+			html,
+			blocks
+		} );
+	}
+
+	changeHtml( html ) {
+		this.setState( {
+			html
+		} );
+	}
+
+	changeBlocks( blocks ) {
+		this.setState( {
+			blocks
+		} );
+	}
+
+	render() {
+		const { mode, html, blocks } = this.state;
+		return (
+			<div>
+				<div className="editor__header">
+					<ModeSwitcher mode={ mode } onSwitch={ this.switchMode } />
+				</div>
+				<div className="editor__body">
+					{ mode === 'text' && <EditorText html={ html } onChange={ this.changeHtml } /> }
+					{ mode === 'visual' && <EditorVisual blocks={ blocks } onChange={ this.changeBlocks } /> }
+				</div>
+			</div>
+		);
+	}
+}
+
+export default Layout;

editor/editor/mode-switcher.js

@@ -0,0 +1,54 @@
+class ModeSwitcher extends wp.element.Component {
+	constructor() {
+		super( ...arguments );
+		this.toggle = this.toggle.bind( this );
+		this.state = {
+			opened: false
+		};
+	}
+
+	toggle( event ) {
+		event.preventDefault();
+		this.setState( {
+			opened: ! this.state.opened
+		} );
+	}
+
+	render() {
+		const { opened } = this.state;
+		const modes = [
+			{ value: 'visual', label: 'Visual' },
+			{ value: 'text', label: 'Text' },
+		];
+		const switchMode = ( mode ) => () => {
+			this.setState( { opened: false } );
+			this.props.onSwitch( mode );
+		};
+		const currentMode = modes.find( ( { value } ) => value === this.props.mode );
+
+		return (
+			<div className="editor-mode-switcher">
+				<button
+					className="editor-mode-switcher__toggle"
+					onClick={ this.toggle }
+					aria-label="Switch the editor mode"
+				>
+					{ currentMode.label }
+					<span className="dashicons dashicons-arrow-down" />
+				</button>
+				{ opened &&
+					<div className="editor-mode-switcher__content">
+						<div className="editor-mode-switcher__arrow" />
+						{ modes.map( ( mode ) =>
+							<button key={ mode.value } onClick={ switchMode( mode.value ) }>
+								{ mode.label }
+							</button>
+						) }
+					</div>
+				}
+			</div>
+		);
+	}
+}
+
+export default ModeSwitcher;

editor/editor/mode/text.js

@@ -0,0 +1,9 @@
+const Text = ( { html, onChange } ) => {
+	return (
+		<div className="editor-mode-text">
+			<textarea value={ html } onChange={ onChange } />
+		</div>
+	);
+};
+
+export default Text;

editor/editor/mode/visual.js

@@ -0,0 +1,34 @@
+/**
+ * Internal dependencies
+ */
+import InserterButton from '../../inserter/button';
+
+const Blocks = ( { blocks, onChange } ) => {
+	const onChangeBlock = ( index ) => ( changes ) => {
+		const newBlock = {
+			...blocks[ index ],
+			changes
+		};
+
+		onChange( [
+			...blocks.slice( 0, index ),
+			newBlock,
+			...blocks.slice( index + 1 )
+		] );
+	};
+
+	return (
+		<div className="editor-mode-visual">
+			<div>
+				{ blocks.map( ( block, index ) =>
+					<div key={ index }>
+						{ wp.blocks.getBlockSettings( block.blockType ).edit( block.attributes, onChangeBlock( index ) ) }
+					</div>
+				) }
+			</div>
+			<InserterButton />
+		</div>
+	);
+};
+
+export default Blocks;

editor/editor/style.scss

@@ -0,0 +1,85 @@
+.editor__header {
+	padding: 10px;
+	border-bottom: 1px solid $light-gray;
+}
+
+.editor-mode-switcher {
+	position: relative;
+}
+
+.editor-mode-switcher__toggle {
+	color: $gray;
+	padding: 8px;
+	align-items: center;
+	cursor: pointer;
+	border: none;
+	background: none;
+	border-right: 1px solid $light-gray;
+	vertical-align: middle;
+	line-height: 20px;
+	outline: none;
+}
+
+.editor-mode-switcher__content {
+	position: absolute;
+	top: 40px;
+	border: 1px solid $light-gray;
+	color: $gray;
+	min-width: 100px;
+
+	button {
+		padding: 8px;
+		display: block;
+		border: none;
+		background: white;
+		outline: none;
+		cursor: pointer;
+		width: 100%;
+	}
+}
+
+.editor-mode-switcher__arrow {
+	border: 10px dashed $light-gray;
+	height: 0;
+	line-height: 0;
+	position: absolute;
+	width: 0;
+	z-index: 1;
+	top: -10px;
+	left: 50%;
+	margin-left: -10px;
+	border-bottom-style: solid;
+	border-top: none;
+	border-left-color: transparent;
+	border-right-color: transparent;
+
+	&:before {
+		top: 2px;
+		border: 10px solid white;
+		content: " ";
+		position: absolute;
+		left: 50%;
+		margin-left: -10px;
+		border-bottom-style: solid;
+		border-top: none;
+		border-left-color: transparent;
+		border-right-color: transparent;
+	}
+}
+
+.editor-mode-text {
+	padding: 60px;
+	width: 700px;
+	margin: 0 auto;
+
+	textarea {
+		width: 100%;
+		min-height: 300px;
+	}
+}
+
+.editor-mode-visual {
+	padding: 60px;
+	width: 700px;
+	margin: 0 auto;
+}