Revert of Remove support for legacy WebKit Notifications

Source/modules/notifications/NotificationCenter.cpp

Index: Source/modules/notifications/NotificationCenter.cpp
diff --git a/Source/modules/notifications/NotificationCenter.cpp b/Source/modules/notifications/NotificationCenter.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..591d097b7781b095bb5670e8712220be14641936
--- /dev/null
+++ b/Source/modules/notifications/NotificationCenter.cpp
@@ -0,0 +1,144 @@
+/*
+ * Copyright (C) 2009 Google Inc. All rights reserved.
+ * Copyright (C) 2012 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#if ENABLE(LEGACY_NOTIFICATIONS)
+
+#include "modules/notifications/NotificationCenter.h"
+
+#include "core/dom/Document.h"
+#include "core/workers/WorkerGlobalScope.h"
+#include "modules/notifications/NotificationClient.h"
+#include "platform/weborigin/SecurityOrigin.h"
+
+namespace WebCore {
+
+PassRefPtrWillBeRawPtr<NotificationCenter> NotificationCenter::create(ExecutionContext* context, NotificationClient* client)
+{
+    RefPtrWillBeRawPtr<NotificationCenter> notificationCenter = adoptRefWillBeNoop(new NotificationCenter(context, client));
+    notificationCenter->suspendIfNeeded();
+    return notificationCenter.release();
+}
+
+NotificationCenter::NotificationCenter(ExecutionContext* context, NotificationClient* client)
+    : ActiveDOMObject(context)
+    , m_client(client)
+{
+    ScriptWrappable::init(this);
+}
+
+int NotificationCenter::checkPermission()
+{
+    if (!client() || !executionContext())
+        return NotificationClient::PermissionDenied;
+
+    switch (executionContext()->securityOrigin()->canShowNotifications()) {
+    case SecurityOrigin::AlwaysAllow:
+        return NotificationClient::PermissionAllowed;
+    case SecurityOrigin::AlwaysDeny:
+        return NotificationClient::PermissionDenied;
+    case SecurityOrigin::Ask:
+        return m_client->checkPermission(executionContext());
+    }
+
+    ASSERT_NOT_REACHED();
+    return m_client->checkPermission(executionContext());
+}
+
+void NotificationCenter::requestPermission(PassOwnPtr<VoidCallback> callback)
+{
+    if (!client() || !executionContext())
+        return;
+
+    switch (executionContext()->securityOrigin()->canShowNotifications()) {
+    case SecurityOrigin::AlwaysAllow:
+    case SecurityOrigin::AlwaysDeny: {
+        m_callbacks.add(NotificationRequestCallback::createAndStartTimer(this, callback));
+        return;
+    }
+    case SecurityOrigin::Ask:
+        return m_client->requestPermission(executionContext(), callback);
+    }
+
+    ASSERT_NOT_REACHED();
+    m_client->requestPermission(executionContext(), callback);
+}
+
+void NotificationCenter::stop()
+{
+    m_client = 0;
+}
+
+void NotificationCenter::requestTimedOut(NotificationCenter::NotificationRequestCallback* request)
+{
+    m_callbacks.remove(request);
+}
+
+void NotificationCenter::trace(Visitor* visitor)
+{
+    visitor->trace(m_callbacks);
+}
+
+PassRefPtrWillBeRawPtr<NotificationCenter::NotificationRequestCallback> NotificationCenter::NotificationRequestCallback::createAndStartTimer(NotificationCenter* center, PassOwnPtr<VoidCallback> callback)
+{
+    RefPtrWillBeRawPtr<NotificationCenter::NotificationRequestCallback> requestCallback = adoptRefWillBeNoop(new NotificationCenter::NotificationRequestCallback(center, callback));
+    requestCallback->startTimer();
+    return requestCallback.release();
+}
+
+NotificationCenter::NotificationRequestCallback::NotificationRequestCallback(NotificationCenter* center, PassOwnPtr<VoidCallback> callback)
+    : m_notificationCenter(center)
+    , m_timer(this, &NotificationCenter::NotificationRequestCallback::timerFired)
+    , m_callback(callback)
+{
+}
+
+void NotificationCenter::NotificationRequestCallback::startTimer()
+{
+    m_timer.startOneShot(0);
+}
+
+void NotificationCenter::NotificationRequestCallback::timerFired(Timer<NotificationCenter::NotificationRequestCallback>*)
+{
+    if (m_callback)
+        m_callback->handleEvent();
+    m_notificationCenter->requestTimedOut(this);
+}
+
+void NotificationCenter::NotificationRequestCallback::trace(Visitor* visitor)
+{
+    visitor->trace(m_notificationCenter);
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(LEGACY_NOTIFICATIONS)