1 files changed, 82 insertions, 0 deletions
diff --git a/dom/xul/XULMenuElement.cpp b/dom/xul/XULMenuElement.cpp
new file mode 100644
index 0000000000..928e850012
--- /dev/null
+++ b/dom/xul/XULMenuElement.cpp
@@ -0,0 +1,82 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/dom/XULMenuElement.h"
+#include "mozilla/StaticAnalysisFunctions.h"
+#include "mozilla/dom/XULButtonElement.h"
+#include "mozilla/dom/XULMenuElementBinding.h"
+#include "mozilla/dom/XULPopupElement.h"
+#include "mozilla/dom/KeyboardEvent.h"
+#include "mozilla/dom/KeyboardEventBinding.h"
+#include "nsXULPopupManager.h"
+#include "nsMenuPopupFrame.h"
+
+namespace mozilla::dom {
+
+JSObject* XULMenuElement::WrapNode(JSContext* aCx,
+                                   JS::Handle<JSObject*> aGivenProto) {
+  return XULMenuElement_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+Element* XULMenuElement::GetActiveMenuChild() {
+  RefPtr popup = GetMenuPopupContent();
+  return popup ? popup->GetActiveMenuChild() : nullptr;
+}
+
+void XULMenuElement::SetActiveMenuChild(Element* aChild) {
+  RefPtr popup = GetMenuPopupContent();
+  if (NS_WARN_IF(!popup)) {
+    return;
+  }
+
+  if (!aChild) {
+    popup->SetActiveMenuChild(nullptr);
+    return;
+  }
+  auto* button = XULButtonElement::FromNode(aChild);
+  if (NS_WARN_IF(!button) || NS_WARN_IF(!button->IsMenu())) {
+    return;
+  }
+  // KnownLive because it's aChild.
+  popup->SetActiveMenuChild(MOZ_KnownLive(button));
+}
+
+bool XULButtonElement::HandleKeyPress(KeyboardEvent& keyEvent) {
+  RefPtr<nsXULPopupManager> pm = nsXULPopupManager::GetInstance();
+  if (!pm) {
+    return false;
+  }
+
+  // if event has already been handled, bail
+  if (keyEvent.DefaultPrevented()) {
+    return false;
+  }
+
+  if (keyEvent.IsMenuAccessKeyPressed()) {
+    return false;
+  }
+
+  nsMenuPopupFrame* popupFrame = GetMenuPopup(FlushType::Frames);
+  if (NS_WARN_IF(!popupFrame)) {
+    return false;
+  }
+
+  uint32_t keyCode = keyEvent.KeyCode();
+  switch (keyCode) {
+    case KeyboardEvent_Binding::DOM_VK_UP:
+    case KeyboardEvent_Binding::DOM_VK_DOWN:
+    case KeyboardEvent_Binding::DOM_VK_HOME:
+    case KeyboardEvent_Binding::DOM_VK_END: {
+      nsNavigationDirection theDirection;
+      theDirection = NS_DIRECTION_FROM_KEY_CODE(popupFrame, keyCode);
+      return pm->HandleKeyboardNavigationInPopup(popupFrame, theDirection);
+    }
+    default:
+      return pm->HandleShortcutNavigation(keyEvent, popupFrame);
+  }
+}
+
+}  // namespace mozilla::dom