Story Hierarchy - keyboard accessibility

lib/ui/src/modules/ui/components/layout/index.js

@@ -204,7 +204,7 @@ class Layout extends React.Component {
             showLeftPanel,
             () =>
               <div style={leftPanelStyle(leftPanelOnTop)}>
-                <div style={{ flexGrow: 1, height: '100%' }}>{leftPanel()}</div>
+                <div style={{ flexGrow: 1, height: '100%', width: '100%' }}>{leftPanel()}</div>
                 <USplit shift={5} split={storiesSplit} />
               </div>,
             () => <span />

lib/ui/src/modules/ui/components/left_panel/index.js

@@ -8,7 +8,7 @@ import TextFilter from './text_filter';
 const scrollStyle = {
   height: 'calc(100vh - 105px)',
   marginTop: 10,
-  overflowY: 'auto',
+  overflow: 'auto',
 };
 
 const mainStyle = {

lib/ui/src/modules/ui/components/left_panel/stories_tree/index.js

@@ -3,10 +3,11 @@ import PropTypes from 'prop-types';
 import React from 'react';
 import deepEqual from 'deep-equal';
 import treeNodeTypes from './tree_node_type';
-import treeDecorators from './tree_decorators';
+import createTreeDecorators from './tree_decorators';
 import treeStyle from './tree_style';
 
 const namespaceSeparator = '@';
+const keyCodeEnter = 13;
 
 function createNodeKey({ namespaces, type }) {
   return [...namespaces, [type]].join(namespaceSeparator);
@@ -39,12 +40,14 @@ class Stories extends React.Component {
   constructor(...args) {
     super(...args);
     this.onToggle = this.onToggle.bind(this);
+    this.onKeyDown = this.onKeyDown.bind(this);
 
     const { selectedHierarchy } = this.props;
 
     this.state = {
       nodes: getSelectedNodes(selectedHierarchy),
     };
+    this.treeDecorators = createTreeDecorators(this);
   }
 
   componentWillReceiveProps(nextProps) {
@@ -82,6 +85,12 @@ class Stories extends React.Component {
     }));
   }
 
+  onKeyDown(event, node) {
+    if (event.keyCode === keyCodeEnter) {
+      this.onToggle(node, !node.toggled);
+    }
+  }
+
   fireOnKind(kind) {
     const { onSelectStory } = this.props;
     if (onSelectStory) onSelectStory(kind, null);
@@ -144,7 +153,7 @@ class Stories extends React.Component {
         style={treeStyle}
         data={data}
         onToggle={this.onToggle}
-        decorators={treeDecorators}
+        decorators={this.treeDecorators}
       />
     );
   }

lib/ui/src/modules/ui/components/left_panel/stories_tree/index.test.js

@@ -313,5 +313,46 @@ describe('manager.ui.components.left_panel.stories', () => {
 
       expect(onSelectStory).toHaveBeenCalledWith('another.space.20', 'b2');
     });
+
+    test('should call the onSelectStory prop when a story is selected with enter key', () => {
+      const data = createHierarchy(
+        [
+          { kind: 'some.name.item1', stories: ['a1', 'a2'] },
+          { kind: 'another.space.20', stories: ['b1', 'b2'] },
+        ],
+        '\\.'
+      );
+
+      const onSelectStory = jest.fn();
+      const wrap = mount(
+        <Stories
+          storiesHierarchy={data}
+          selectedKind="some.name.item1"
+          selectedStory="a2"
+          selectedHierarchy={['some', 'name', 'item1']}
+          onSelectStory={onSelectStory}
+        />
+      );
+
+      wrap
+        .find('a')
+        .filterWhere(el => el.text() === 'another')
+        .last()
+        .simulate('keyDown', { keyCode: 13 });
+
+      wrap
+        .find('a')
+        .filterWhere(el => el.text() === 'space')
+        .last()
+        .simulate('keyDown', { keyCode: 13 });
+
+      wrap
+        .find('a')
+        .filterWhere(el => el.text() === '20')
+        .last()
+        .simulate('keyDown', { keyCode: 13 });
+
+      expect(onSelectStory).toHaveBeenCalledWith('another.space.20', null);
+    });
   });
 });

lib/ui/src/modules/ui/components/left_panel/stories_tree/tree_decorators.js

@@ -34,41 +34,61 @@ ContainerDecorator.propTypes = {
   }).isRequired,
 };
 
-function HeaderDecorator(props) {
-  const { style, node } = props;
+function createHeaderDecoratorScope(parent) {
+  class HeaderDecorator extends React.Component {
+    constructor(...args) {
+      super(...args);
+      this.onKeyDown = this.onKeyDown.bind(this);
+    }
 
-  const newStyleTitle = {
-    ...style.title,
-  };
+    onKeyDown(event) {
+      const { onKeyDown } = parent;
+      const { node } = this.props;
+
+      onKeyDown(event, node);
+    }
+
+    render() {
+      const { style, node } = this.props;
+
+      const newStyleTitle = {
+        ...style.title,
+      };
 
-  const Icon = iconsMap[node.type];
+      const Icon = iconsMap[node.type];
 
-  if (!node.children || !node.children.length) {
-    newStyleTitle.fontSize = '13px';
+      if (!node.children || !node.children.length) {
+        newStyleTitle.fontSize = '13px';
+      }
+
+      return (
+        <div style={style.base} role="menuitem" tabIndex="0" onKeyDown={this.onKeyDown}>
+          {Icon && <Icon color={iconsColor} />}
+          <a style={newStyleTitle}>
+            {node.name}
+          </a>
+        </div>
+      );
+    }
   }
 
-  return (
-    <div style={style.base}>
-      {Icon && <Icon color={iconsColor} />}
-      <a style={newStyleTitle}>
-        {node.name}
-      </a>
-    </div>
-  );
-}
+  HeaderDecorator.propTypes = {
+    style: PropTypes.shape({
+      title: PropTypes.object.isRequired,
+      base: PropTypes.object.isRequired,
+    }).isRequired,
+    node: PropTypes.shape({
+      name: PropTypes.string.isRequired,
+    }).isRequired,
+  };
 
-HeaderDecorator.propTypes = {
-  style: PropTypes.shape({
-    title: PropTypes.object,
-    base: PropTypes.object,
-  }).isRequired,
-  node: PropTypes.shape({
-    name: PropTypes.string,
-  }).isRequired,
-};
+  return HeaderDecorator;
+}
 
-export default {
-  ...decorators,
-  Header: HeaderDecorator,
-  Container: ContainerDecorator,
-};
+export default function(parent) {
+  return {
+    ...decorators,
+    Header: createHeaderDecoratorScope(parent),
+    Container: ContainerDecorator,
+  };
+}

lib/ui/src/modules/ui/components/left_panel/stories_tree/tree_style.js

@@ -1,5 +1,7 @@
 import { baseFonts } from '../../theme';
 
+const toggleWidth = '24px';
+
 export default {
   tree: {
     base: {
@@ -8,6 +10,7 @@ export default {
       padding: 0,
       fontFamily: baseFonts.fontFamily,
       fontSize: '15px',
+      minWidth: '200px',
     },
     node: {
       base: {
@@ -30,7 +33,7 @@ export default {
           verticalAlign: 'top',
           marginLeft: '-5px',
           height: '24px',
-          width: '24px',
+          width: toggleWidth,
         },
         wrapper: {
           position: 'absolute',
@@ -49,6 +52,7 @@ export default {
         base: {
           display: 'inline-block',
           verticalAlign: 'top',
+          maxWidth: `calc(100% - ${toggleWidth})`,
         },
         connector: {
           width: '2px',