feat: keyboard shortcuts for primary actions (#2030)

packages/ui-services/src/Keyboard/modifiersForEvent.ts

@@ -0,0 +1,18 @@
+import { KeyboardModifier } from './KeyboardModifier'
+
+export function modifiersForEvent(event: KeyboardEvent): KeyboardModifier[] {
+  const allModifiers = Object.values(KeyboardModifier)
+  const eventModifiers = allModifiers.filter((modifier) => {
+    // For a modifier like ctrlKey, must check both event.ctrlKey and event.key.
+    // That's because on keyup, event.ctrlKey would be false, but event.key == Control would be true.
+    const matches =
+      ((event.ctrlKey || event.key === KeyboardModifier.Ctrl) && modifier === KeyboardModifier.Ctrl) ||
+      ((event.metaKey || event.key === KeyboardModifier.Meta) && modifier === KeyboardModifier.Meta) ||
+      ((event.altKey || event.key === KeyboardModifier.Alt) && modifier === KeyboardModifier.Alt) ||
+      ((event.shiftKey || event.key === KeyboardModifier.Shift) && modifier === KeyboardModifier.Shift)
+
+    return matches
+  })
+
+  return eventModifiers
+}