Only support a single key in the KeyCombo

Keep it simple...

src/KeyBindingsManager.ts

@@ -20,8 +20,7 @@ export enum KeyAction {
  * The combo is evaluated strictly, i.e. the KeyboardEvent must match exactly what is specified in the KeyCombo.
  */
 export type KeyCombo = {
-    /** Currently only one `normal` key is supported */
+    key?: string;
-    keys: string[];
 
     /** On PC: ctrl is pressed; on Mac: meta is pressed */
     ctrlOrCmd?: boolean;
@@ -42,7 +41,7 @@ const messageComposerBindings = (): KeyBinding[] => {
         {
             action: KeyAction.SelectPrevSendHistory,
             keyCombo: {
-                keys: [Key.ARROW_UP],
+                key: Key.ARROW_UP,
                 altKey: true,
                 ctrlKey: true,
             },
@@ -50,7 +49,7 @@ const messageComposerBindings = (): KeyBinding[] => {
         {
             action: KeyAction.SelectNextSendHistory,
             keyCombo: {
-                keys: [Key.ARROW_DOWN],
+                key: Key.ARROW_DOWN,
                 altKey: true,
                 ctrlKey: true,
             },
@@ -58,7 +57,7 @@ const messageComposerBindings = (): KeyBinding[] => {
         {
             action: KeyAction.EditLastMessage,
             keyCombo: {
-                keys: [Key.ARROW_UP],
+                key: Key.ARROW_UP,
             }
         },
     ];
@@ -66,7 +65,7 @@ const messageComposerBindings = (): KeyBinding[] => {
         bindings.push({
             action: KeyAction.Send,
             keyCombo: {
-                keys: [Key.ENTER],
+                key: Key.ENTER,
                 ctrlOrCmd: true,
             },
         });
@@ -74,7 +73,7 @@ const messageComposerBindings = (): KeyBinding[] => {
         bindings.push({
             action: KeyAction.Send,
             keyCombo: {
-                keys: [Key.ENTER],
+                key: Key.ENTER,
             },
         });
     }
@@ -88,7 +87,7 @@ const messageComposerBindings = (): KeyBinding[] => {
  * Note, this method is only exported for testing.
  */
 export function isKeyComboMatch(ev: KeyboardEvent, combo: KeyCombo, onMac: boolean): boolean {
-    if (combo.keys.length > 0 && ev.key !== combo.keys[0]) {
+    if (combo.key !== undefined && ev.key !== combo.key) {
         return false;
     }
 

test/KeyBindingsManager-test.ts

@@ -19,7 +19,7 @@ function mockKeyEvent(key: string, modifiers?: {
 describe('KeyBindingsManager', () => {
     it('should match basic key combo', () => {
         const combo1: KeyCombo = {
-            keys: ['k'],
+            key: 'k',
         };
         assert.strictEqual(isKeyComboMatch(mockKeyEvent('k'), combo1, false), true);
         assert.strictEqual(isKeyComboMatch(mockKeyEvent('n'), combo1, false), false);
@@ -28,7 +28,7 @@ describe('KeyBindingsManager', () => {
 
     it('should match key + modifier key combo', () => {
         const combo: KeyCombo = {
-            keys: ['k'],
+            key: 'k',
             ctrlKey: true,
         };
         assert.strictEqual(isKeyComboMatch(mockKeyEvent('k', { ctrlKey: true }), combo, false), true);
@@ -38,7 +38,7 @@ describe('KeyBindingsManager', () => {
         assert.strictEqual(isKeyComboMatch(mockKeyEvent('k', { shiftKey: true, metaKey: true }), combo, false), false);
 
         const combo2: KeyCombo = {
-            keys: ['k'],
+            key: 'k',
             metaKey: true,
         };
         assert.strictEqual(isKeyComboMatch(mockKeyEvent('k', { metaKey: true }), combo2, false), true);
@@ -47,7 +47,7 @@ describe('KeyBindingsManager', () => {
         assert.strictEqual(isKeyComboMatch(mockKeyEvent('k', { altKey: true, metaKey: true }), combo2, false), false);
 
         const combo3: KeyCombo = {
-            keys: ['k'],
+            key: 'k',
             altKey: true,
         };
         assert.strictEqual(isKeyComboMatch(mockKeyEvent('k', { altKey: true }), combo3, false), true);
@@ -56,7 +56,7 @@ describe('KeyBindingsManager', () => {
         assert.strictEqual(isKeyComboMatch(mockKeyEvent('k', { ctrlKey: true, metaKey: true }), combo3, false), false);
 
         const combo4: KeyCombo = {
-            keys: ['k'],
+            key: 'k',
             shiftKey: true,
         };
         assert.strictEqual(isKeyComboMatch(mockKeyEvent('k', { shiftKey: true }), combo4, false), true);
@@ -67,7 +67,7 @@ describe('KeyBindingsManager', () => {
 
     it('should match key + multiple modifiers key combo', () => {
         const combo: KeyCombo = {
-            keys: ['k'],
+            key: 'k',
             ctrlKey: true,
             altKey: true,
         };
@@ -78,7 +78,7 @@ describe('KeyBindingsManager', () => {
             false), false);
 
         const combo2: KeyCombo = {
-            keys: ['k'],
+            key: 'k',
             ctrlKey: true,
             shiftKey: true,
             altKey: true,
@@ -92,7 +92,7 @@ describe('KeyBindingsManager', () => {
             { ctrlKey: true, shiftKey: true, altKey: true, metaKey: true }), combo2, false), false);
 
         const combo3: KeyCombo = {
-            keys: ['k'],
+            key: 'k',
             ctrlKey: true,
             shiftKey: true,
             altKey: true,
@@ -108,7 +108,7 @@ describe('KeyBindingsManager', () => {
 
     it('should match ctrlOrMeta key combo', () => {
         const combo: KeyCombo = {
-            keys: ['k'],
+            key: 'k',
             ctrlOrCmd: true,
         };
         // PC:
@@ -123,7 +123,7 @@ describe('KeyBindingsManager', () => {
 
     it('should match advanced ctrlOrMeta key combo', () => {
         const combo: KeyCombo = {
-            keys: ['k'],
+            key: 'k',
             ctrlOrCmd: true,
             altKey: true,
         };