Web MIDI: add blink APIs to notify device connection events

Source/modules/webmidi/MIDIAccessInitializer.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MIDIAccessInitializer_h
 #define MIDIAccessInitializer_h
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "modules/webmidi/MIDIAccessor.h"
 #include "modules/webmidi/MIDIAccessorClient.h"
 #include "modules/webmidi/MIDIPort.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class MIDIOptions;
 class ScriptState;
 
 class MIDIAccessInitializer : public ScriptPromiseResolver, public MIDIAccessorClient {
 public:
     struct PortDescriptor {
         String id;
         String manufacturer;
         String name;
         MIDIPort::MIDIPortTypeCode type;
         String version;
+        bool isActive;
 
-        PortDescriptor(const String& id, const String& manufacturer, const String& name, MIDIPort::MIDIPortTypeCode type, const String& version)
+        PortDescriptor(const String& id, const String& manufacturer, const String& name, MIDIPort::MIDIPortTypeCode type, const String& version, bool isActive)
             : id(id)
             , manufacturer(manufacturer)
             , name(name)
             , type(type)
-            , version(version) { }
+            , version(version)
+            , isActive(isActive) { }
     };
 
     static ScriptPromise start(ScriptState* scriptState, const MIDIOptions& options)
     {
         RefPtr<MIDIAccessInitializer> p = adoptRef(new MIDIAccessInitializer(scriptState, options));
         p->keepAliveWhilePending();
         p->suspendIfNeeded();
         return p->start();
     }
 
     virtual ~MIDIAccessInitializer();
 
     // MIDIAccessorClient
-    virtual void didAddInputPort(const String& id, const String& manufacturer, const String& name, const String& version) override;
-    virtual void didAddOutputPort(const String& id, const String& manufacturer, const String& name, const String& version) override;
+    virtual void didAddInputPort(const String& id, const String& manufacturer, const String& name, const String& version, bool isActive) override;
+    virtual void didAddOutputPort(const String& id, const String& manufacturer, const String& name, const String& version, bool isActive) override;
+    virtual void didSetInputPortState(unsigned portIndex, bool isActive) override;
+    virtual void didSetOutputPortState(unsigned portIndex, bool isActive) override;
     virtual void didStartSession(bool success, const String& error, const String& message) override;
     virtual void didReceiveMIDIData(unsigned portIndex, const unsigned char* data, size_t length, double timeStamp) override { }
 
     void resolveSysexPermission(bool allowed);
     SecurityOrigin* securityOrigin() const;
 
 private:
     ScriptPromise start();
 
     MIDIAccessInitializer(ScriptState*, const MIDIOptions&);
 
     ExecutionContext* executionContext() const;
 
     OwnPtr<MIDIAccessor> m_accessor;
     bool m_requestSysex;
     Vector<PortDescriptor> m_portDescriptors;
 };
 
 } // namespace blink
 
 
 #endif // MIDIAccessInitializer_h