gecko-dev/ipc/testshell/TestShellParent.cpp

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "TestShellParent.h"

/* This must occur *after* TestShellParent.h to avoid typedefs conflicts. */
#include "mozilla/Util.h"

#include "mozilla/dom/ContentParent.h"
#include "mozilla/jsipc/ContextWrapperParent.h"

#include "nsAutoPtr.h"

using namespace mozilla;
using mozilla::ipc::TestShellParent;
using mozilla::ipc::TestShellCommandParent;
using mozilla::ipc::PTestShellCommandParent;
using mozilla::dom::ContentParent;
using mozilla::jsipc::PContextWrapperParent;
using mozilla::jsipc::ContextWrapperParent;

PTestShellCommandParent*
TestShellParent::AllocPTestShellCommand(const nsString& aCommand)
{
  return new TestShellCommandParent();
}

bool
TestShellParent::DeallocPTestShellCommand(PTestShellCommandParent* aActor)
{
  delete aActor;
  return true;
}

bool
TestShellParent::CommandDone(TestShellCommandParent* command,
                             const nsString& aResponse)
{
  // XXX what should happen if the callback fails?
  /*JSBool ok = */command->RunCallback(aResponse);
  command->ReleaseCallback();

  return true;
}

PContextWrapperParent*
TestShellParent::AllocPContextWrapper()
{
    ContentParent* cpp = static_cast<ContentParent*>(Manager());
    return new ContextWrapperParent(cpp);
}

bool
TestShellParent::DeallocPContextWrapper(PContextWrapperParent* actor)
{
    delete actor;
    return true;
}

JSBool
TestShellParent::GetGlobalJSObject(JSContext* cx, JSObject** globalp)
{
    // TODO Unify this code with TabParent::GetGlobalJSObject.
    InfallibleTArray<PContextWrapperParent*> cwps(1);
    ManagedPContextWrapperParent(cwps);
    if (cwps.Length() < 1)
        return JS_FALSE;
    NS_ASSERTION(cwps.Length() == 1, "More than one PContextWrapper?");
    ContextWrapperParent* cwp = static_cast<ContextWrapperParent*>(cwps[0]);
    return cwp->GetGlobalJSObject(cx, globalp);
}

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.ToJSValPtr() != JSVAL_NULL && mCx, JS_FALSE);

  JSAutoRequest ar(mCx);

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

  JSAutoEnterCompartment ac;
  if (!ac.enter(mCx, global)) {
    NS_ERROR("Failed to enter compartment!");
    return false;
  }

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

  jsval argv[] = { STRING_TO_JSVAL(str) };
  unsigned argc = ArrayLength(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();
}

bool
TestShellCommandParent::ExecuteCallback(const nsString& aResponse)
{
  return static_cast<TestShellParent*>(Manager())->CommandDone(
      this, aResponse);
}

void
TestShellCommandParent::ActorDestroy(ActorDestroyReason why)
{
  if (why == AbnormalShutdown) {
    ExecuteCallback(EmptyString());
  }
}