gecko/dom/plugins/ipc/PluginIdentifierChild.h

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: sw=2 ts=2 et :
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Plugins.
 *
 * The Initial Developer of the Original Code is
 *   Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Ben Turner <bent.mozilla@gmail.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef dom_plugins_PluginIdentifierChild_h
#define dom_plugins_PluginIdentifierChild_h

#include "mozilla/plugins/PPluginIdentifierChild.h"
#include "mozilla/plugins/PluginModuleChild.h"

#include "nsStringGlue.h"

namespace mozilla {
namespace plugins {

class PluginIdentifierChild : public PPluginIdentifierChild
{
  friend class PluginModuleChild;
public:
  bool IsString()
  {
    return reinterpret_cast<intptr_t>(mCanonicalIdentifier) & 1;
  }

  NPIdentifier ToNPIdentifier()
  {
    return reinterpret_cast<PluginIdentifierChild*>(
      reinterpret_cast<intptr_t>(mCanonicalIdentifier) & ~1);
  }

protected:
  PluginIdentifierChild(bool aIsString)
    : ALLOW_THIS_IN_INITIALIZER_LIST(mCanonicalIdentifier(this))
  {
    MOZ_COUNT_CTOR(PluginIdentifierChild);
    if (aIsString) {
      SetIsString();
    }
  }

  virtual ~PluginIdentifierChild()
  {
    MOZ_COUNT_DTOR(PluginIdentifierChild);
  }

  void SetCanonicalIdentifier(PluginIdentifierChild* aIdentifier)
  {
    NS_ASSERTION(ToNPIdentifier() == this, "Already got one!");
    bool isString = IsString();
    mCanonicalIdentifier = aIdentifier;
    if (isString) {
      SetIsString();
    }
  }

private:
  void SetIsString()
  {
    mCanonicalIdentifier = reinterpret_cast<PluginIdentifierChild*>(
      reinterpret_cast<intptr_t>(mCanonicalIdentifier) | 1);
  }

  PluginIdentifierChild* mCanonicalIdentifier;
};

class PluginIdentifierChildString : public PluginIdentifierChild
{
  friend class PluginModuleChild;
public:
  NPUTF8* ToString()
  {
    return ToNewCString(mString);
  }

protected:
  PluginIdentifierChildString(const nsCString& aString)
    : PluginIdentifierChild(true),
      mString(aString)
  { }

  nsCString mString;
};

class PluginIdentifierChildInt : public PluginIdentifierChild
{
  friend class PluginModuleChild;
public:
  int32_t ToInt()
  {
    return mInt;
  }

protected:
  PluginIdentifierChildInt(int32_t aInt)
    : PluginIdentifierChild(false),
      mInt(aInt)
  { }

  int32_t mInt;
};

} // namespace plugins
} // namespace mozilla

#endif // dom_plugins_PluginIdentifierChild_h