Get basic keyboard selection working

src/components/views/rooms/Autocomplete.js

@@ -1,5 +1,6 @@
 import React from 'react';
 import ReactCSSTransitionGroup from 'react-addons-css-transition-group';
+import classNames from 'classnames';
 
 import {getCompletions} from '../../../autocomplete/Autocompleter';
 
@@ -41,16 +42,34 @@ export default class Autocomplete extends React.Component {
         });
     }
 
+    onUpArrow() {
+        this.setState({selectionOffset: this.state.selectionOffset - 1});
+        return true;
+    }
+
+    onDownArrow() {
+        this.setState({selectionOffset: this.state.selectionOffset + 1});
+        return true;
+    }
+
     render() {
+        let position = 0;
         let renderedCompletions = this.state.completions.map((completionResult, i) => {
             let completions = completionResult.completions.map((completion, i) => {
                 let Component = completion.component;
+                let className = classNames('mx_Autocomplete_Completion', {
+                    'selected': position == this.state.selectionOffset
+                });
+                let componentPosition = position;
+                position++;
                 if(Component) {
                     return Component;
                 }
                 
                 return (
-                    <div key={i} className="mx_Autocomplete_Completion" tabIndex={0}>
+                    <div key={i}
+                         className={className}
+                         onMouseOver={() => this.setState({selectionOffset: componentPosition})}>
                         <span style={{fontWeight: 600}}>{completion.title}</span>
                         <span>{completion.subtitle}</span>
                         <span style={{flex: 1}} />

src/components/views/rooms/MessageComposer.js

@@ -34,6 +34,9 @@ export default class MessageComposer extends React.Component {
         this.onUploadFileSelected = this.onUploadFileSelected.bind(this);
         this.onVoiceCallClick = this.onVoiceCallClick.bind(this);
         this.onInputContentChanged = this.onInputContentChanged.bind(this);
+        this.onUpArrow = this.onUpArrow.bind(this);
+        this.onDownArrow = this.onDownArrow.bind(this);
+        this.onTab = this.onTab.bind(this);
 
         this.state = {
             autocompleteQuery: '',
@@ -129,6 +132,18 @@ export default class MessageComposer extends React.Component {
         });
     }
 
+    onUpArrow() {
+       return this.refs.autocomplete.onUpArrow();
+    }
+
+    onDownArrow() {
+        return this.refs.autocomplete.onDownArrow();
+    }
+
+    onTab() {
+        return this.refs.autocomplete.onTab();
+    }
+
     render() {
         var me = this.props.room.getMember(MatrixClientPeg.get().credentials.userId);
         var uploadInputStyle = {display: 'none'};
@@ -182,9 +197,14 @@ export default class MessageComposer extends React.Component {
             );
 
             controls.push(
-                <MessageComposerInput key="controls_input" tabComplete={this.props.tabComplete}
-                    onResize={this.props.onResize} room={this.props.room}
-                                      onContentChanged={this.onInputContentChanged} />,
+                <MessageComposerInput
+                    key="controls_input"
+                    onResize={this.props.onResize}
+                    room={this.props.room}
+                    onUpArrow={this.onUpArrow}
+                    onDownArrow={this.onDownArrow}
+                    onTab={this.onTab}
+                    onContentChanged={this.onInputContentChanged} />,
                 uploadButton,
                 hangupButton,
                 callButton,
@@ -201,7 +221,10 @@ export default class MessageComposer extends React.Component {
         return (
             <div className="mx_MessageComposer mx_fadable" style={{ opacity: this.props.opacity }}>
                 <div className="mx_MessageComposer_autocomplete_wrapper">
-                    <Autocomplete query={this.state.autocompleteQuery} selection={this.state.selection} />
+                    <Autocomplete
+                        ref="autocomplete"
+                        query={this.state.autocompleteQuery}
+                        selection={this.state.selection} />
                 </div>
                 <div className="mx_MessageComposer_wrapper">
                     <div className="mx_MessageComposer_row">

src/components/views/rooms/MessageComposerInput.js

@@ -73,6 +73,9 @@ export default class MessageComposerInput extends React.Component {
         this.handleReturn = this.handleReturn.bind(this);
         this.handleKeyCommand = this.handleKeyCommand.bind(this);
         this.setEditorState = this.setEditorState.bind(this);
+        this.onUpArrow = this.onUpArrow.bind(this);
+        this.onDownArrow = this.onDownArrow.bind(this);
+        this.onTab = this.onTab.bind(this);
 
         let isRichtextEnabled = window.localStorage.getItem('mx_editor_rte_enabled');
         if(isRichtextEnabled == null) {
@@ -489,6 +492,30 @@ export default class MessageComposerInput extends React.Component {
         return true;
     }
 
+    onUpArrow(e) {
+        if(this.props.onUpArrow) {
+            if(this.props.onUpArrow()) {
+                e.preventDefault();
+            }
+        }
+    }
+
+    onDownArrow(e) {
+        if(this.props.onDownArrow) {
+            if(this.props.onDownArrow()) {
+                e.preventDefault();
+            }
+        }
+    }
+
+    onTab(e) {
+        if(this.props.onTab) {
+            if(this.props.onTab()) {
+                e.preventDefault();
+            }
+        }
+    }
+
     render() {
         let className = "mx_MessageComposer_input";
 
@@ -507,6 +534,9 @@ export default class MessageComposerInput extends React.Component {
                         handleKeyCommand={this.handleKeyCommand}
                         handleReturn={this.handleReturn}
                         stripPastedStyles={!this.state.isRichtextEnabled}
+                        onTab={this.onTab}
+                        onUpArrow={this.onUpArrow}
+                        onDownArrow={this.onDownArrow}
                         spellCheck={true} />
             </div>
         );
@@ -524,5 +554,11 @@ MessageComposerInput.propTypes = {
     room: React.PropTypes.object.isRequired,
 
     // called with current plaintext content (as a string) whenever it changes
-    onContentChanged: React.PropTypes.func
+    onContentChanged: React.PropTypes.func,
+
+    onUpArrow: React.PropTypes.func,
+
+    onDownArrow: React.PropTypes.func,
+
+    onTab: React.PropTypes.func
 };