Take advantage of upstream's refactor and reduce code duplication

app/javascript/flavours/glitch/features/compose/components/dropdown_icon_button.jsx

@@ -5,7 +5,7 @@ import Overlay from 'react-overlays/Overlay';
 
 import { IconButton } from 'flavours/glitch/components/icon_button';
 
-import DropdownMenu from './dropdown_menu';
+import { PrivacyDropdownMenu } from './privacy_dropdown_menu';
 
 export const DropdownIconButton = ({ value, disabled, icon, onChange, iconComponent, title, options }) => {
   const containerRef = useRef(null);
@@ -53,7 +53,7 @@ export const DropdownIconButton = ({ value, disabled, icon, onChange, iconCompon
         {({ props, placement }) => (
           <div {...props}>
             <div className={`dropdown-animation privacy-dropdown__dropdown ${placement}`}>
-              <DropdownMenu
+              <PrivacyDropdownMenu
                 items={options}
                 value={value}
                 onClose={handleClose}

app/javascript/flavours/glitch/features/compose/components/dropdown_menu.jsx

@@ -1,125 +0,0 @@
-import PropTypes from 'prop-types';
-import { PureComponent } from 'react';
-
-import classNames from 'classnames';
-
-import { supportsPassiveEvents } from 'detect-passive-events';
-
-import { Icon }  from 'flavours/glitch/components/icon';
-
-const listenerOptions = supportsPassiveEvents ? { passive: true, capture: true } : true;
-
-// copied from PrivacyDropdown; will require refactor with upstream down the line
-class DropdownMenu extends PureComponent {
-
-  static propTypes = {
-    style: PropTypes.object,
-    items: PropTypes.array.isRequired,
-    value: PropTypes.string.isRequired,
-    onClose: PropTypes.func.isRequired,
-    onChange: PropTypes.func.isRequired,
-  };
-
-  handleDocumentClick = e => {
-    if (this.node && !this.node.contains(e.target)) {
-      this.props.onClose();
-      e.stopPropagation();
-    }
-  };
-
-  handleKeyDown = e => {
-    const { items } = this.props;
-    const value = e.currentTarget.getAttribute('data-index');
-    const index = items.findIndex(item => {
-      return (item.value === value);
-    });
-    let element = null;
-
-    switch(e.key) {
-    case 'Escape':
-      this.props.onClose();
-      break;
-    case 'Enter':
-      this.handleClick(e);
-      break;
-    case 'ArrowDown':
-      element = this.node.childNodes[index + 1] || this.node.firstChild;
-      break;
-    case 'ArrowUp':
-      element = this.node.childNodes[index - 1] || this.node.lastChild;
-      break;
-    case 'Tab':
-      if (e.shiftKey) {
-        element = this.node.childNodes[index - 1] || this.node.lastChild;
-      } else {
-        element = this.node.childNodes[index + 1] || this.node.firstChild;
-      }
-      break;
-    case 'Home':
-      element = this.node.firstChild;
-      break;
-    case 'End':
-      element = this.node.lastChild;
-      break;
-    }
-
-    if (element) {
-      element.focus();
-      this.props.onChange(element.getAttribute('data-index'));
-      e.preventDefault();
-      e.stopPropagation();
-    }
-  };
-
-  handleClick = e => {
-    const value = e.currentTarget.getAttribute('data-index');
-
-    e.preventDefault();
-
-    this.props.onClose();
-    this.props.onChange(value);
-  };
-
-  componentDidMount () {
-    document.addEventListener('click', this.handleDocumentClick, { capture: true });
-    document.addEventListener('touchend', this.handleDocumentClick, listenerOptions);
-    if (this.focusedItem) this.focusedItem.focus({ preventScroll: true });
-  }
-
-  componentWillUnmount () {
-    document.removeEventListener('click', this.handleDocumentClick, { capture: true });
-    document.removeEventListener('touchend', this.handleDocumentClick, listenerOptions);
-  }
-
-  setRef = c => {
-    this.node = c;
-  };
-
-  setFocusRef = c => {
-    this.focusedItem = c;
-  };
-
-  render () {
-    const { style, items, value } = this.props;
-
-    return (
-      <div style={{ ...style }} role='listbox' ref={this.setRef}>
-        {items.map(item => (
-          <div role='option' tabIndex={0} key={item.value} data-index={item.value} onKeyDown={this.handleKeyDown} onClick={this.handleClick} className={classNames('privacy-dropdown__option', { active: item.value === value })} aria-selected={item.value === value} ref={item.value === value ? this.setFocusRef : null}>
-            <div className='privacy-dropdown__option__icon'>
-              <Icon id={item.icon} icon={item.iconComponent} />
-            </div>
-
-            <div className='privacy-dropdown__option__content'>
-              <strong>{item.text}</strong>
-              {item.meta}
-            </div>
-          </div>
-        ))}
-      </div>
-    );
-  }
-
-}
-
-export default DropdownMenu;