third_party/WebKit/public/web/modules/webmidi/WebMIDIClient.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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 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#ifndef WebMIDIClient_h
#define WebMIDIClient_h

namespace blink {

struct WebMIDIOptions;
class WebMIDIPermissionRequest;

class WebMIDIClient {
public:
    virtual ~WebMIDIClient() { }

    // Request a permission to use MIDI system. Called when requestMIDIAccess()
    // is called with any option.
    // Once the request is done, any WebMIDIPermissionRequest instances equal to
    // |request| must not be accessed after that.
    virtual void requestPermission(const WebMIDIPermissionRequest& /* request */, const WebMIDIOptions& /* options */) = 0;

    // Cancel the request since the requesting frame may be moving to
    // a new page.
    // Once canceled, any WebMIDIPermissionRequest instances equal to
    // |request| must not be accessed after that.
    virtual void cancelPermissionRequest(const WebMIDIPermissionRequest& /* request */) = 0;
};

} // namespace blink

#endif // WebMIDIClient_h