1/*
2 * Copyright (C) 2013 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#ifndef WebMIDIClient_h
32#define WebMIDIClient_h
33
34namespace blink {
35
36class WebMIDIPermissionRequest;
37
38class WebMIDIClient {
39public:
40    virtual ~WebMIDIClient() { }
41
42    // Request a permission to use system exclusive messages. Called when
43    // MIDIOptions.sysex is true.
44    // Once the request is done, any WebMIDIPermissionRequest instances equal to
45    // |request| must not be accessed after that.
46    virtual void requestSysexPermission(const WebMIDIPermissionRequest& /* request */) = 0;
47
48    // Cancel the request since the requesting frame may be moving to
49    // a new page.
50    // Once canceled, any WebMIDIPermissionRequest instances equal to
51    // |request| must not be accessed after that.
52    virtual void cancelSysexPermissionRequest(const WebMIDIPermissionRequest& /* request */) = 0;
53};
54
55} // namespace blink
56
57#endif // WebMIDIClient_h
58