third_party/WebKit/public/platform/WebMessagePortChannel.h

/*
 * Copyright (C) 2009 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef WebMessagePortChannel_h
#define WebMessagePortChannel_h

#include "WebCommon.h"
#include "WebVector.h"

#if INSIDE_BLINK
#include <memory>
#endif

namespace blink {

class WebMessagePortChannelClient;
class WebString;

typedef WebVector<class WebMessagePortChannel*> WebMessagePortChannelArray;

// Provides an interface to a Message Port Channel implementation. The object
// owns itself and is signalled that its not needed anymore with the destroy()
// call.
class WebMessagePortChannel {
 public:
  virtual void setClient(WebMessagePortChannelClient*) = 0;
  virtual void destroy() = 0;
  // Callee receives ownership of the passed vector.
  // FIXME: Blob refs should be passed to maintain ref counts. crbug.com/351753
  virtual void postMessage(const WebString&, WebMessagePortChannelArray*) = 0;
  virtual bool tryGetMessage(WebString*, WebMessagePortChannelArray&) = 0;

 protected:
  ~WebMessagePortChannel() {}
};

#if INSIDE_BLINK

struct WebMessagePortChannelDeleter {
  void operator()(WebMessagePortChannel* channel) {
    if (channel)
      channel->destroy();
  }
};

using WebMessagePortChannelUniquePtr =
    std::unique_ptr<WebMessagePortChannel, WebMessagePortChannelDeleter>;

#endif  // INSIDE_BLINK

}  // namespace blink

#endif  // WebMessagePortChannel_h