1 files changed, 120 insertions, 0 deletions
diff --git a/dom/events/ShortcutKeys.cpp b/dom/events/ShortcutKeys.cpp
new file mode 100644
index 0000000000..20b9d039d1
--- /dev/null
+++ b/dom/events/ShortcutKeys.cpp
@@ -0,0 +1,120 @@
+/* -*- 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 "ShortcutKeys.h"
+#include "mozilla/KeyEventHandler.h"
+#include "nsContentUtils.h"
+#include "nsAtom.h"
+#include "mozilla/TextEvents.h"
+
+namespace mozilla {
+
+NS_IMPL_ISUPPORTS(ShortcutKeys, nsIObserver);
+
+StaticRefPtr<ShortcutKeys> ShortcutKeys::sInstance;
+
+ShortcutKeys::ShortcutKeys()
+    : mBrowserHandlers(nullptr),
+      mEditorHandlers(nullptr),
+      mInputHandlers(nullptr),
+      mTextAreaHandlers(nullptr) {
+  MOZ_ASSERT(!sInstance, "Attempt to instantiate a second ShortcutKeys.");
+  nsContentUtils::RegisterShutdownObserver(this);
+}
+
+ShortcutKeys::~ShortcutKeys() {
+  delete mBrowserHandlers;
+  delete mEditorHandlers;
+  delete mInputHandlers;
+  delete mTextAreaHandlers;
+}
+
+nsresult ShortcutKeys::Observe(nsISupports* aSubject, const char* aTopic,
+                               const char16_t* aData) {
+  // Clear our strong reference so we can clean up.
+  ShortcutKeys::Shutdown();
+  return NS_OK;
+}
+
+void ShortcutKeys::Shutdown() { sInstance = nullptr; }
+
+/* static */
+KeyEventHandler* ShortcutKeys::GetHandlers(HandlerType aType) {
+  if (!sInstance) {
+    sInstance = new ShortcutKeys();
+  }
+
+  return sInstance->EnsureHandlers(aType);
+}
+
+/* static */
+nsAtom* ShortcutKeys::ConvertEventToDOMEventType(
+    const WidgetKeyboardEvent* aWidgetKeyboardEvent) {
+  switch (aWidgetKeyboardEvent->mMessage) {
+    case eKeyDown:
+      return nsGkAtoms::keydown;
+    case eKeyUp:
+      return nsGkAtoms::keyup;
+    // eAccessKeyNotFound event is always created from eKeyPress event and
+    // the original eKeyPress event has stopped its propagation before
+    // dispatched into the DOM tree in this process and not matched with remote
+    // content's access keys.  So, we should treat it as an eKeyPress event and
+    // execute a command if it's registered as a shortcut key.
+    case eKeyPress:
+    case eAccessKeyNotFound:
+      return nsGkAtoms::keypress;
+    default:
+      MOZ_ASSERT_UNREACHABLE(
+          "All event messages relating to shortcut keys should be handled");
+      return nullptr;
+  }
+}
+
+KeyEventHandler* ShortcutKeys::EnsureHandlers(HandlerType aType) {
+  ShortcutKeyData* keyData;
+  KeyEventHandler** cache;
+
+  switch (aType) {
+    case HandlerType::eBrowser:
+      keyData = &sBrowserHandlers[0];
+      cache = &mBrowserHandlers;
+      break;
+    case HandlerType::eEditor:
+      keyData = &sEditorHandlers[0];
+      cache = &mEditorHandlers;
+      break;
+    case HandlerType::eInput:
+      keyData = &sInputHandlers[0];
+      cache = &mInputHandlers;
+      break;
+    case HandlerType::eTextArea:
+      keyData = &sTextAreaHandlers[0];
+      cache = &mTextAreaHandlers;
+      break;
+    default:
+      MOZ_ASSERT(false, "Unknown handler type requested.");
+  }
+
+  if (*cache) {
+    return *cache;
+  }
+
+  KeyEventHandler* lastHandler = nullptr;
+  while (keyData->event) {
+    KeyEventHandler* handler = new KeyEventHandler(keyData);
+    if (lastHandler) {
+      lastHandler->SetNextHandler(handler);
+    } else {
+      *cache = handler;
+    }
+    lastHandler = handler;
+    keyData++;
+  }
+
+  return *cache;
+}
+
+}  // namespace mozilla