Using NavigableContainer to make a TabPanel for Inserter

components/index.js

@@ -26,6 +26,7 @@ export { default as Popover } from './popover';
 export { default as ResponsiveWrapper } from './responsive-wrapper';
 export { default as SandBox } from './sandbox';
 export { default as Spinner } from './spinner';
+export { default as TabPanel } from './tab-panel';
 export { default as Toolbar } from './toolbar';
 export { default as Tooltip } from './tooltip';
 export { Slot, Fill, Provider as SlotFillProvider } from './slot-fill';

components/tab-panel/README.md

@@ -0,0 +1,100 @@
+TabPanel
+=======
+
+TabPanel is a React component to render an ARIA-compliant TabPanel. It has two sections: a list of tabs, and the view to show when tabs are chosen. When the list of tabs gets focused, the active tab gets focus (the first tab if there isn't one already). Use the arrow keys to navigate between tabs AND select the newly focused tab at the same time.
+
+TabPanel is a Function-as-Children component. The function takes `tabName` as an argument.
+
+## Usage
+
+Renders a TabPanel with each tab representing a paragraph with its title.
+
+```jsx
+
+import { TabPanel } from '@wordpress/components';
+
+const onSelect = ( tabName ) => {
+	console.log( 'Selecting tab', tabName );
+};
+
+function MyTabPanel() {
+	return (
+		<TabPanel className="my-tab-panel"
+			activeClass="active-tab"
+			onSelect={ onSelect }
+			tabs={ [
+				{
+					name: 'tab1',
+					title: 'Tab 1',
+					className: 'tab-one',
+				},
+				{
+					name: 'tab2',
+					title: 'Tab 2',
+					className: 'tab-two',
+				},
+			] }>
+			{
+				( tabName ) => {
+					return <p>${ tabName }</p>;
+				}
+			}
+		</TabPanel>
+	)
+}
+```
+
+## Props
+
+The component accepts the following props:
+
+### className
+
+The class to give to the outer container for the TabPanel
+
+- Type: `String`
+- Required: No
+- Default: ''
+
+### orientation
+
+The orientation of the tablist (`vertical` or `horizontal`)
+
+- Type: `String`
+- Required: No
+- Default: `horizontal`
+
+### onSelect
+
+The function called when a tab has been selected. It is passed the `tabName` as an argument.
+
+- Type: `Function`
+- Required: No
+- Default: `noop`
+
+### tabs
+
+A list of tabs where each tab is defined by an object with the following fields:
+
+1. name: String. Defines the key for the tab
+2. title: String. Defines the translated text for the tab
+3. className: String. Defines the class to put on the tab.
+
+- Type: Array
+- Required: Yes
+
+### activeClass
+
+The class to add to the active tab
+
+- Type: `String`
+- Required: No
+- Default: `is-active`
+
+### children
+
+A function which renders the tabviews given the selected tab. The function is passed a `tabName` as an argument.
+The element to which the tooltip should anchor.
+
+- Type: (`String`) => `Element`
+- Required: Yes

components/tab-panel/index.js

@@ -0,0 +1,94 @@
+/**
+ * External dependencies
+ */
+import { partial, noop, omit } from 'lodash';
+
+/**
+ * WordPress dependencies
+ */
+// import './style.scss';
+import { Component } from '@wordpress/element';
+
+/**
+ * Internal Dependencies
+ */
+import { default as withInstanceId } from '../higher-order/with-instance-id';
+import { NavigableMenu } from '../navigable-container';
+
+const TabButton = ( { tabId, onClick, children, selected, ...rest } ) => {
+	return <button role="tab"
+		tabIndex={ selected ? null : -1 }
+		aria-selected={ selected }
+		id={ tabId }
+		onClick={ onClick }
+		{ ...rest }
+	>
+		{ children }
+	</button>;
+};
+
+class TabPanel extends Component {
+	constructor() {
+		super( ...arguments );
+
+		this.handleClick = this.handleClick.bind( this );
+		this.onNavigate = this.onNavigate.bind( this );
+
+		this.state = {
+			selected: this.props.tabs.length > 0 ? this.props.tabs[ 0 ].name : null,
+		};
+	}
+
+	handleClick( tabKey ) {
+		const { onSelect = noop } = this.props;
+		this.setState( {
+			selected: tabKey,
+		} );
+		onSelect( tabKey );
+	}
+
+	onNavigate( childIndex, child ) {
+		child.click();
+	}
+
+	render() {
+		const { selected } = this.state;
+		const { instanceId, tabs, activeClass = 'is-active', className, orientation = 'horizontal' } = this.props;
+
+		const selectedTab = tabs.find( ( t ) => t.name === selected );
+		const selectedId = instanceId + '-' + selectedTab.name;
+
+		return (
+			<div>
+				<NavigableMenu
+					role="tablist"
+					orientation={ orientation }
+					onNavigate={ this.onNavigate }
+					className={ className }
+				>
+					{ tabs.map( ( tab ) =>
+						<TabButton className={ `${ tab.className } ${ tab.name === selected ? activeClass : '' }` }
+							tabId={ instanceId + '-' + tab.name }
+							aria-controls={ instanceId + '-' + tab.name + '-view' }
+							selected={ tab.name === selected }
+							key={ tab.name }
+							onClick={ partial( this.handleClick, tab.name ) }
+						>
+							{ tab.title }
+						</TabButton> )
+					}
+				</NavigableMenu>
+				{
+					selectedTab &&
+						<div aria-labelledby={ selectedId }
+							role="tabpanel"
+							id={ selectedId + '-view' }>
+							{ this.props.children( selectedTab.name ) }
+						</div>
+				}
+			</div>
+		);
+	}
+}
+
+export default withInstanceId( TabPanel );

components/tab-panel/test/index.js

@@ -0,0 +1,91 @@
+/**
+ * External dependencies
+ */
+import { mount } from 'enzyme';
+
+/**
+ * Internal dependencies
+ */
+import TabPanel from '../';
+
+describe( 'TabPanel', () => {
+	describe( 'basic rendering', () => {
+		it( 'should render a tabpanel, and clicking should change tabs', () => {
+			const wrapper = mount(
+				<TabPanel className="test-panel"
+					activeClass="active-tab"
+					tabs={
+						[
+							{
+								name: 'alpha',
+								title: 'Alpha',
+								className: 'alpha',
+							},
+							{
+								name: 'beta',
+								title: 'Beta',
+								className: 'beta',
+							},
+							{
+								name: 'gamma',
+								title: 'Gamma',
+								className: 'gamma',
+							},
+						]
+					}
+				>
+					{
+						( tabName ) => {
+							return <p tabIndex="0" className={ tabName + '-view' }>{ tabName }</p>;
+						}
+					}
+				</TabPanel>
+			);
+
+			const alphaTab = wrapper.find( 'button.alpha' );
+			const betaTab = wrapper.find( 'button.beta' );
+			const gammaTab = wrapper.find( 'button.gamma' );
+
+			const getAlphaView = () => wrapper.find( 'p.alpha-view' );
+			const getBetaView = () => wrapper.find( 'p.beta-view' );
+			const getGammaView = () => wrapper.find( 'p.gamma-view' );
+
+			const getActiveTab = () => wrapper.find( 'button.active-tab' );
+			const getActiveView = () => wrapper.find( 'div[role="tabpanel"]' );
+
+			expect( getActiveTab().text() ).toBe( 'Alpha' );
+			expect( getAlphaView().length ).toBe( 1 );
+			expect( getBetaView().length ).toBe( 0 );
+			expect( getGammaView().length ).toBe( 0 );
+			expect( getActiveView().text() ).toBe( 'alpha' );
+
+			betaTab.simulate( 'click' );
+			expect( getActiveTab().text() ).toBe( 'Beta' );
+			expect( getAlphaView().length ).toBe( 0 );
+			expect( getBetaView().length ).toBe( 1 );
+			expect( getGammaView().length ).toBe( 0 );
+			expect( getActiveView().text() ).toBe( 'beta' );
+
+			betaTab.simulate( 'click' );
+			expect( getActiveTab().text() ).toBe( 'Beta' );
+			expect( getAlphaView().length ).toBe( 0 );
+			expect( getBetaView().length ).toBe( 1 );
+			expect( getGammaView().length ).toBe( 0 );
+			expect( getActiveView().text() ).toBe( 'beta' );
+
+			gammaTab.simulate( 'click' );
+			expect( getActiveTab().text() ).toBe( 'Gamma' );
+			expect( getAlphaView().length ).toBe( 0 );
+			expect( getBetaView().length ).toBe( 0 );
+			expect( getGammaView().length ).toBe( 1 );
+			expect( getActiveView().text() ).toBe( 'gamma' );
+
+			alphaTab.simulate( 'click' );
+			expect( getActiveTab().text() ).toBe( 'Alpha' );
+			expect( getAlphaView().length ).toBe( 1 );
+			expect( getBetaView().length ).toBe( 0 );
+			expect( getGammaView().length ).toBe( 0 );
+			expect( getActiveView().text() ).toBe( 'alpha' );
+		} );
+	} );
+} );

editor/components/inserter/group.js

@@ -0,0 +1,86 @@
+/**
+ * External dependencies
+ */
+import { isEqual } from 'lodash';
+
+/**
+ * WordPress dependencies
+ */
+import { Component } from '@wordpress/element';
+import { NavigableMenu } from '@wordpress/components';
+import { BlockIcon } from '@wordpress/blocks';
+
+function deriveActiveBlocks( blocks ) {
+	return blocks.filter( ( block ) => ! block.disabled );
+}
+
+export default class InserterGroup extends Component {
+	constructor() {
+		super( ...arguments );
+
+		this.onNavigate = this.onNavigate.bind( this );
+
+		this.activeBlocks = deriveActiveBlocks( this.props.blockTypes );
+		this.state = {
+			current: this.activeBlocks.length > 0 ? this.activeBlocks[ 0 ].name : null,
+		};
+	}
+
+	componentWillReceiveProps( nextProps ) {
+		if ( ! isEqual( this.props.blockTypes, nextProps.blockTypes ) ) {
+			this.activeBlocks = deriveActiveBlocks( nextProps.blockTypes );
+			// Try and preserve any still valid selected state.
+			const current = this.activeBlocks.find( block => block.name === this.state.current );
+			if ( ! current ) {
+				this.setState( {
+					current: this.activeBlocks.length > 0 ? this.activeBlocks[ 0 ].name : null,
+				} );
+			}
+		}
+	}
+
+	renderItem( block ) {
+		const { current } = this.state;
+		const { selectBlock, bindReferenceNode } = this.props;
+		const disabled = block.disabled;
+		return (
+			<button
+				role="menuitem"
+				key={ block.name }
+				className="editor-inserter__block"
+				onClick={ selectBlock( block.name ) }
+				ref={ bindReferenceNode( block.name ) }
+				tabIndex={ current === block.name || disabled ? null : '-1' }
+				onMouseEnter={ ! disabled ? this.props.showInsertionPoint : null }
+				onMouseLeave={ ! disabled ? this.props.hideInsertionPoint : null }
+				disabled={ disabled }
+			>
+				<BlockIcon icon={ block.icon } />
+				{ block.title }
+			</button>
+		);
+	}
+
+	onNavigate( index ) {
+		const { activeBlocks } = this;
+		const dest = activeBlocks[ index ];
+		if ( dest ) {
+			this.setState( {
+				current: dest.name,
+			} );
+		}
+	}
+
+	render() {
+		const { labelledBy, blockTypes } = this.props;
+
+		return <NavigableMenu
+			className="editor-inserter__category-blocks"
+			orientation="vertical"
+			aria-labelledby={ labelledBy }
+			cycle={ false }
+			onNavigate={ this.onNavigate }>
+			{ blockTypes.map( this.renderItem, this ) }
+		</NavigableMenu>;
+	}
+}