summaryrefslogtreecommitdiffstats
path: root/dom/events/ShortcutKeys.cpp
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--dom/events/ShortcutKeys.cpp120
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