/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "mozilla/EventListenerManager.h"
#include "mozilla/dom/EventTarget.h"
#include "mozilla/dom/EventTargetBinding.h"
#include "mozilla/dom/ConstructibleEventTarget.h"
#include "nsIGlobalObject.h"
#include "nsThreadUtils.h"

namespace mozilla {
namespace dom {

/* static */
already_AddRefed<EventTarget> EventTarget::Constructor(
    const GlobalObject& aGlobal, ErrorResult& aRv) {
  nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
  if (!global) {
    aRv.Throw(NS_ERROR_UNEXPECTED);
    return nullptr;
  }
  RefPtr<EventTarget> target = new ConstructibleEventTarget(global);
  return target.forget();
}

void EventTarget::RemoveEventListener(
    const nsAString& aType, EventListener* aListener,
    const EventListenerOptionsOrBoolean& aOptions, ErrorResult& aRv) {
  EventListenerManager* elm = GetExistingListenerManager();
  if (elm) {
    elm->RemoveEventListener(aType, aListener, aOptions);
  }
}

EventHandlerNonNull* EventTarget::GetEventHandler(
    nsAtom* aType, const nsAString& aTypeString) {
  EventListenerManager* elm = GetExistingListenerManager();
  return elm ? elm->GetEventHandler(aType, aTypeString) : nullptr;
}

void EventTarget::SetEventHandler(const nsAString& aType,
                                  EventHandlerNonNull* aHandler,
                                  ErrorResult& aRv) {
  if (!StringBeginsWith(aType, NS_LITERAL_STRING("on"))) {
    aRv.Throw(NS_ERROR_INVALID_ARG);
    return;
  }
  if (NS_IsMainThread()) {
    RefPtr<nsAtom> type = NS_Atomize(aType);
    SetEventHandler(type, EmptyString(), aHandler);
    return;
  }
  SetEventHandler(nullptr, Substring(aType, 2),  // Remove "on"
                  aHandler);
}

void EventTarget::SetEventHandler(nsAtom* aType, const nsAString& aTypeString,
                                  EventHandlerNonNull* aHandler) {
  GetOrCreateListenerManager()->SetEventHandler(aType, aTypeString, aHandler);
}

bool EventTarget::HasNonSystemGroupListenersForUntrustedKeyEvents() const {
  EventListenerManager* elm = GetExistingListenerManager();
  return elm && elm->HasNonSystemGroupListenersForUntrustedKeyEvents();
}

bool EventTarget::HasNonPassiveNonSystemGroupListenersForUntrustedKeyEvents()
    const {
  EventListenerManager* elm = GetExistingListenerManager();
  return elm &&
         elm->HasNonPassiveNonSystemGroupListenersForUntrustedKeyEvents();
}

bool EventTarget::IsApzAware() const {
  EventListenerManager* elm = GetExistingListenerManager();
  return elm && elm->HasApzAwareListeners();
}

bool EventTarget::DispatchEvent(Event& aEvent, CallerType aCallerType,
                                ErrorResult& aRv) {
  bool result = false;
  aRv = DispatchEvent(&aEvent, &result);
  return !aEvent.DefaultPrevented(aCallerType);
}

}  // namespace dom
}  // namespace mozilla