Source/modules/webmidi/MIDIAccess.h

/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 * in the documentation and/or other materials provided with the
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#ifndef MIDIAccess_h
#define MIDIAccess_h

#include "bindings/core/v8/ScriptPromise.h"
#include "core/dom/ActiveDOMObject.h"
#include "modules/EventTargetModules.h"
#include "modules/webmidi/MIDIAccessInitializer.h"
#include "modules/webmidi/MIDIAccessor.h"
#include "modules/webmidi/MIDIAccessorClient.h"
#include "modules/webmidi/MIDIInput.h"
#include "modules/webmidi/MIDIOutput.h"
#include "platform/heap/Handle.h"
#include "wtf/Vector.h"

namespace blink {

class ExecutionContext;
struct MIDIOptions;

class MIDIAccess FINAL : public RefCountedGarbageCollectedWillBeGarbageCollectedFinalized<MIDIAccess>, public ActiveDOMObject, public EventTargetWithInlineData, public MIDIAccessorClient {
    DEFINE_EVENT_TARGET_REFCOUNTING_WILL_BE_REMOVED(RefCountedGarbageCollected<MIDIAccess>);
    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(MIDIAccess);
public:
    static MIDIAccess* create(PassOwnPtr<MIDIAccessor> accessor, bool sysexEnabled, const Vector<MIDIAccessInitializer::PortDescriptor>& ports, ExecutionContext* executionContext)
    {
        MIDIAccess* access = new MIDIAccess(accessor, sysexEnabled, ports, executionContext);
        access->suspendIfNeeded();
        return access;
    }
    virtual ~MIDIAccess();

    MIDIInputVector inputs() const { return m_inputs; }
    MIDIOutputVector outputs() const { return m_outputs; }

    DEFINE_ATTRIBUTE_EVENT_LISTENER(connect);
    DEFINE_ATTRIBUTE_EVENT_LISTENER(disconnect);

    bool sysexEnabled() const { return m_sysexEnabled; }

    // EventTarget
    virtual const AtomicString& interfaceName() const OVERRIDE { return EventTargetNames::MIDIAccess; }
    virtual ExecutionContext* executionContext() const OVERRIDE { return ActiveDOMObject::executionContext(); }

    // ActiveDOMObject
    virtual void stop() OVERRIDE;

    // 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 didStartSession(bool success, const String& error, const String& message) OVERRIDE
    {
        // This method is for MIDIAccess initialization: MIDIAccessInitializer
        // has the implementation.
        ASSERT_NOT_REACHED();
    }
    virtual void didReceiveMIDIData(unsigned portIndex, const unsigned char* data, size_t length, double timeStamp) OVERRIDE;

    // |timeStampInMilliseconds| is in the same time coordinate system as performance.now().
    void sendMIDIData(unsigned portIndex, const unsigned char* data, size_t length, double timeStampInMilliseconds);

    virtual void trace(Visitor*) OVERRIDE;

private:
    MIDIAccess(PassOwnPtr<MIDIAccessor>, bool sysexEnabled, const Vector<MIDIAccessInitializer::PortDescriptor>&, ExecutionContext*);

    OwnPtr<MIDIAccessor> m_accessor;
    bool m_sysexEnabled;
    MIDIInputVector m_inputs;
    MIDIOutputVector m_outputs;
};

} // namespace blink

#endif // MIDIAccess_h