1/*
2 * Copyright (C) 2009 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 WebMessagePortChannel_h
32#define WebMessagePortChannel_h
33
34#include "WebCommon.h"
35#include "WebVector.h"
36
37namespace blink {
38
39class WebMessagePortChannelClient;
40class WebString;
41
42typedef WebVector<class WebMessagePortChannel*> WebMessagePortChannelArray;
43
44// Provides an interface to a Message Port Channel implementation. The object owns itself and
45// is signalled that its not needed anymore with the destroy() call.
46class WebMessagePortChannel {
47public:
48    virtual void setClient(WebMessagePortChannelClient*) = 0;
49    virtual void destroy() = 0;
50    // Callee receives ownership of the passed vector.
51    // FIXME: Blob refs should be passed to maintain ref counts. crbug.com/351753
52    virtual void postMessage(const WebString&, WebMessagePortChannelArray*) = 0;
53    virtual bool tryGetMessage(WebString*, WebMessagePortChannelArray&) = 0;
54
55protected:
56    ~WebMessagePortChannel() { }
57};
58
59} // namespace blink
60
61#if INSIDE_BLINK
62
63namespace WTF {
64
65template<typename T> struct OwnedPtrDeleter;
66template<> struct OwnedPtrDeleter<blink::WebMessagePortChannel> {
67    static void deletePtr(blink::WebMessagePortChannel* channel)
68    {
69        if (channel)
70            channel->destroy();
71    }
72};
73
74} // namespace WTF
75
76#endif // INSIDE_BLINK
77
78#endif // WebMessagePortChannel_h
79