gecko-dev/ipc/testshell/TestShellParent.cpp

/* ***** 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 IPCShell.
 *
 * 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 "TestShellParent.h"

#include "nsAutoPtr.h"
#include "XPCShellEnvironment.h"

using mozilla::ipc::TestShellParent;
using mozilla::ipc::TestShellCommandParent;
using mozilla::ipc::TestShellCommandProtocolParent;
using mozilla::ipc::XPCShellEnvironment;

TestShellCommandProtocolParent*
TestShellParent::TestShellCommandConstructor(const nsString& aCommand)
{
  return new TestShellCommandParent();
}

nsresult
TestShellParent::TestShellCommandDestructor(TestShellCommandProtocolParent* aActor,
                                            const nsString& aResponse)
{
  NS_ENSURE_ARG_POINTER(aActor);
  delete aActor;
  return NS_OK;
}

nsresult
TestShellParent::RecvTestShellCommandDestructor(TestShellCommandProtocolParent* aActor,
                                                const nsString& aResponse)
{
  NS_ENSURE_ARG_POINTER(aActor);

  TestShellCommandParent* command =
    static_cast<TestShellCommandParent*>(aActor);

  JSBool ok = command->RunCallback(aResponse);
  command->ReleaseCallback();

  if (!mXPCShell) {
    NS_WARNING("Processing a child message after exiting, need to spin events "
               "somehow to process this result");
    return NS_ERROR_UNEXPECTED;
  }

  NS_WARN_IF_FALSE(mXPCShell->EventLoopDepth(), "EventLoopDepth mismatch!");
  if (mXPCShell->EventLoopDepth()) {
    mXPCShell->DecrementEventLoopDepth();
  }

  NS_ENSURE_TRUE(ok, NS_ERROR_FAILURE);

  return NS_OK;
}

JSBool
TestShellCommandParent::SetCallback(JSContext* aCx,
                                    jsval aCallback)
{
  if (!mCallback.Hold(aCx)) {
    return JS_FALSE;
  }

  mCallback = aCallback;
  mCx = aCx;

  return JS_TRUE;
}

JSBool
TestShellCommandParent::RunCallback(const nsString& aResponse)
{
  NS_ENSURE_TRUE(mCallback && mCx, JS_FALSE);

  JSAutoRequest ar(mCx);

  JSObject* global = JS_GetGlobalObject(mCx);
  NS_ENSURE_TRUE(global, JS_FALSE);

  JSString* str = JS_NewUCStringCopyN(mCx, aResponse.get(), aResponse.Length());
  NS_ENSURE_TRUE(str, JS_FALSE);

  jsval argv[] = { STRING_TO_JSVAL(str) };
  int argc = NS_ARRAY_LENGTH(argv);

  jsval rval;
  JSBool ok = JS_CallFunctionValue(mCx, global, mCallback, argc, argv, &rval);
  NS_ENSURE_TRUE(ok, JS_FALSE);

  return JS_TRUE;
}

void
TestShellCommandParent::ReleaseCallback()
{
  mCallback.Release();
}