MediaStream API: Patch #1 of implementing navigator.getMediaDevices

Source/modules/mediastream/MediaDevicesRequest.cpp

+/*
+ * Copyright (C) 2014 Google 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:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``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 GOOGLE INC. 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"
+
+#include "modules/mediastream/MediaDevicesRequest.h"
+
+#include "bindings/v8/ExceptionState.h"
+#include "core/dom/Document.h"
+#include "modules/mediastream/UserMediaController.h"
+
+namespace WebCore {
+
+PassRefPtr<MediaDevicesRequest> MediaDevicesRequest::create(ExecutionContext* context, UserMediaController* controller, PassOwnPtr<MediaDeviceInfoCallback> callback, ExceptionState& exceptionState)
+{
+    RefPtr<MediaDevicesRequest> request = adoptRef(new MediaDevicesRequest(context, controller, callback));
+    request->suspendIfNeeded();
+    return request.release();
+}
+
+MediaDevicesRequest::MediaDevicesRequest(ExecutionContext* context, UserMediaController* controller, PassOwnPtr<MediaDeviceInfoCallback> callback)
+    : ActiveDOMObject(context)
+    , m_controller(controller)
+    , m_callback(callback)
+{
+}
+
+MediaDevicesRequest::~MediaDevicesRequest()
+{
+}
+
+Document* MediaDevicesRequest::ownerDocument()
+{
+    if (ExecutionContext* context = executionContext()) {
+        return toDocument(context);
+    }
+
+    return 0;
+}
+
+void MediaDevicesRequest::start()
+{
+    if (m_controller)
+        m_controller->requestMediaDevices(this);
+}
+
+void MediaDevicesRequest::succeed(const MediaDeviceInfoVector& mediaDevices)
+{
+    if (!executionContext() || !m_callback)
+        return;
+
+    m_callback->handleEvent(mediaDevices);
+}
+
+void MediaDevicesRequest::stop()
+{
+    m_callback.clear();
+    m_controller = 0;
+}
+
+} // namespace WebCore