dom/events/EventTarget.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "mozilla/EventListenerManager.h"
   7 #include "mozilla/dom/EventTarget.h"
   8 #include "nsThreadUtils.h"
   9
  10 namespace mozilla {
  11 namespace dom {
  12
  13 void
  14 EventTarget::RemoveEventListener(const nsAString& aType,
  15                                  EventListener* aListener,
  16                                  bool aUseCapture,
  17                                  ErrorResult& aRv)
  18 {
  19   EventListenerManager* elm = GetExistingListenerManager();
  20   if (elm) {
  21     elm->RemoveEventListener(aType, aListener, aUseCapture);
  22   }
  23 }
  24
  25 EventHandlerNonNull*
  26 EventTarget::GetEventHandler(nsIAtom* aType, const nsAString& aTypeString)
  27 {
  28   EventListenerManager* elm = GetExistingListenerManager();
  29   return elm ? elm->GetEventHandler(aType, aTypeString) : nullptr;
  30 }
  31
  32 void
  33 EventTarget::SetEventHandler(const nsAString& aType,
  34                              EventHandlerNonNull* aHandler,
  35                              ErrorResult& aRv)
  36 {
  37   if (!StringBeginsWith(aType, NS_LITERAL_STRING("on"))) {
  38     aRv.Throw(NS_ERROR_INVALID_ARG);
  39     return;
  40   }
  41   if (NS_IsMainThread()) {
  42     nsCOMPtr<nsIAtom> type = do_GetAtom(aType);
  43     SetEventHandler(type, EmptyString(), aHandler);
  44     return;
  45   }
  46   SetEventHandler(nullptr,
  47                   Substring(aType, 2), // Remove "on"
  48                   aHandler);
  49 }
  50
  51 void
  52 EventTarget::SetEventHandler(nsIAtom* aType, const nsAString& aTypeString,
  53                              EventHandlerNonNull* aHandler)
  54 {
  55   GetOrCreateListenerManager()->SetEventHandler(aType, aTypeString, aHandler);
  56 }
  57
  58 } // namespace dom
  59 } // namespace mozilla