/* ***** 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 Plugin App.
 *
 * The Initial Developer of the Original Code is
 *   Ben Turner <bent.mozilla@gmail.com>.
 * Portions created by the Initial Developer are Copyright (C) 2009
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * 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 ***** */

#include "ScopedXREEmbed.h"

#include "base/command_line.h"
#include "base/string_util.h"

#include "nsIFile.h"
#include "nsILocalFile.h"

#include "nsCOMPtr.h"
#include "nsServiceManagerUtils.h"
#include "nsStringGlue.h"
#include "nsXULAppAPI.h"

using mozilla::ipc::ScopedXREEmbed;

ScopedXREEmbed::ScopedXREEmbed()
: mShouldKillEmbedding(false)
{
  NS_LogInit();
}

ScopedXREEmbed::~ScopedXREEmbed()
{
  Stop();
  NS_LogTerm();
}

void
ScopedXREEmbed::Start()
{
  std::string path;
#if defined(OS_WIN)
  path = WideToUTF8(CommandLine::ForCurrentProcess()->program());
#elif defined(OS_POSIX)
  path = CommandLine::ForCurrentProcess()->argv()[0];
#else
#  error Sorry
#endif

  nsCOMPtr<nsILocalFile> localFile;
  nsresult rv = XRE_GetBinaryPath(path.c_str(), getter_AddRefs(localFile));
  if (NS_FAILED(rv))
    return;

  nsCOMPtr<nsIFile> parent;
  rv = localFile->GetParent(getter_AddRefs(parent));
  if (NS_FAILED(rv))
    return;

  localFile = do_QueryInterface(parent);
  NS_ENSURE_TRUE(localFile,);

#ifdef OS_MACOSX
  if (XRE_GetProcessType() == GeckoProcessType_Content) {
    // We're an XPCOM-using subprocess.  Walk out of
    // [subprocess].app/Contents/MacOS to the real GRE dir.
    rv = localFile->GetParent(getter_AddRefs(parent));
    if (NS_FAILED(rv))
      return;

    localFile = do_QueryInterface(parent);
    NS_ENSURE_TRUE(localFile,);

    rv = localFile->GetParent(getter_AddRefs(parent));
    if (NS_FAILED(rv))
      return;

    localFile = do_QueryInterface(parent);
    NS_ENSURE_TRUE(localFile,);

    rv = localFile->GetParent(getter_AddRefs(parent));
    if (NS_FAILED(rv))
      return;

    localFile = do_QueryInterface(parent);
    NS_ENSURE_TRUE(localFile,);
  }
#endif

  rv = XRE_InitEmbedding2(localFile, localFile, nsnull);
  if (NS_FAILED(rv))
    return;

  mShouldKillEmbedding = true;
}

void
ScopedXREEmbed::Stop()
{
  if (mShouldKillEmbedding) {
    XRE_TermEmbedding();
    mShouldKillEmbedding = false;
  }
}