Web MIDI: introduce WebMIDIClient API to request a permission

Source/web/MIDIClientImpl.cpp

+/*
+ * Copyright (C) 2013 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:
+ *
+ *     * 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"
+#include "MIDIClientImpl.h"
+
+#include "WebMIDIClient.h"
+#include "WebMIDIPermissionRequest.h"
+#include "WebViewClient.h"
+#include "WebViewImpl.h"
+#include "modules/webmidi/MIDIAccess.h"
+#include "wtf/RefPtr.h"
+
+using namespace WebCore;
+
+namespace WebKit {
+
+MIDIClientImpl::MIDIClientImpl(WebViewImpl* webView)
+    : m_client(webView->client() ? webView->client()->webMIDIClient() : 0)
+{
+}
+
+void MIDIClientImpl::requestSysExPermission(PassRefPtr<MIDIAccess> access)
+{
+    if (m_client)
+        m_client->requestSysExPermission(WebMIDIPermissionRequest(access));
+    else
+        access->enableSysEx(false);
+}
+
+void MIDIClientImpl::cancelSysExPermissionRequest(MIDIAccess* access)
+{
+    if (m_client)
+        m_client->cancelSysExPermissionRequest(WebMIDIPermissionRequest(access));
+}
+
+} // namespace WebKit