MediaStream API: Implement Navigator.getMediaDevices

Source/modules/mediastream/MediaDevicesRequest.cpp

 /*
- * Copyright (C) 2013 Google Inc. All rights reserved.
+ * 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/MediaStreamTrackSourcesRequestImpl.h"
+#include "modules/mediastream/MediaDevicesRequest.h"
 
-#include "modules/mediastream/MediaStreamTrackSourcesCallback.h"
-#include "platform/weborigin/SecurityOrigin.h"
-#include "public/platform/WebSourceInfo.h"
-#include "wtf/PassOwnPtr.h"
+#include "bindings/v8/ExceptionState.h"
+#include "core/dom/Document.h"
+#include "modules/mediastream/UserMediaController.h"
 
 namespace WebCore {
 
-PassRefPtr<MediaStreamTrackSourcesRequestImpl> MediaStreamTrackSourcesRequestImpl::create(const String& origin, PassOwnPtr<MediaStreamTrackSourcesCallback> callback)
+PassRefPtr<MediaDevicesRequest> MediaDevicesRequest::create(ExecutionContext* context, UserMediaController* controller, PassOwnPtr<MediaDeviceInfoCallback> callback, ExceptionState& exceptionState)
 {
-    return adoptRef(new MediaStreamTrackSourcesRequestImpl(origin, callback));
+    return adoptRef(new MediaDevicesRequest(context, controller, callback));
 }
 
-MediaStreamTrackSourcesRequestImpl::MediaStreamTrackSourcesRequestImpl(const String& origin, PassOwnPtr<MediaStreamTrackSourcesCallback> callback)
-    : m_callback(callback)
-    , m_scheduledEventTimer(this, &MediaStreamTrackSourcesRequestImpl::scheduledEventTimerFired)
-{
-    m_origin = origin;
-}
-
-MediaStreamTrackSourcesRequestImpl::~MediaStreamTrackSourcesRequestImpl()
+MediaDevicesRequest::MediaDevicesRequest(ExecutionContext* context, UserMediaController* controller, PassOwnPtr<MediaDeviceInfoCallback> callback)
+    : ContextLifecycleObserver(context)
+    , m_controller(controller)
+    , m_callback(callback)
 {
 }
 
-void MediaStreamTrackSourcesRequestImpl::requestSucceeded(const blink::WebVector<blink::WebSourceInfo>& webSourceInfos)
+MediaDevicesRequest::~MediaDevicesRequest()
 {
-    ASSERT(m_callback && !m_scheduledEventTimer.isActive());
-
-    for (size_t i = 0; i < webSourceInfos.size(); ++i)
-        m_sourceInfos.append(SourceInfo::create(webSourceInfos[i]));
-
-    m_protect = this;
-    m_scheduledEventTimer.startOneShot(0);
 }
 
-void MediaStreamTrackSourcesRequestImpl::scheduledEventTimerFired(Timer<MediaStreamTrackSourcesRequestImpl>*)
+Document* MediaDevicesRequest::ownerDocument()
 {
-    m_callback->handleEvent(m_sourceInfos);
-    m_callback.clear();
-    m_protect.release();
+    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())
+        return;
+
+    m_callback->handleEvent(mediaDevices);

[abarth-chromium, 2014/01/28 06:49:49]

Generally its better to use ActiveDOMObject for these sorts of classes.  We
don't want to reveal to script when we've garbage collected the document. 
Instead, we want to stop delivering callbacks when the document has called
stop() on all the active DOM objects.

[Tommy Widenflycht, 2014/01/28 22:35:02]

Done.

+}
+
+void MediaDevicesRequest::contextDestroyed()
+{
+    RefPtr<MediaDevicesRequest> protect(this);
+
+    if (m_controller) {
+        m_controller->cancelMediaDevicesRequest(this);
+        m_controller = 0;
+    }
+
+    ContextLifecycleObserver::contextDestroyed();
 }
 
 } // namespace WebCore