gecko-dev/dom/events/AsyncEventDispatcher.cpp

105 lines
3.4 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/AsyncEventDispatcher.h"
#include "mozilla/BasicEvents.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/dom/Event.h" // for nsIDOMEvent::InternalDOMEvent()
#include "mozilla/dom/EventTarget.h"
#include "nsContentUtils.h"
#include "nsIDOMEvent.h"
namespace mozilla {
using namespace dom;
/******************************************************************************
* mozilla::AsyncEventDispatcher
******************************************************************************/
AsyncEventDispatcher::AsyncEventDispatcher(EventTarget* aTarget,
WidgetEvent& aEvent)
: mTarget(aTarget)
, mDispatchChromeOnly(false)
{
MOZ_ASSERT(mTarget);
EventDispatcher::CreateEvent(aTarget, nullptr, &aEvent, EmptyString(),
getter_AddRefs(mEvent));
NS_ASSERTION(mEvent, "Should never fail to create an event");
mEvent->DuplicatePrivateData();
mEvent->SetTrusted(aEvent.mFlags.mIsTrusted);
}
NS_IMETHODIMP
AsyncEventDispatcher::Run()
{
if (mEvent) {
if (mDispatchChromeOnly) {
MOZ_ASSERT(mEvent->InternalDOMEvent()->IsTrusted());
nsCOMPtr<nsINode> node = do_QueryInterface(mTarget);
MOZ_ASSERT(node, "ChromeOnly dispatch supported with Node targets only!");
nsPIDOMWindow* window = node->OwnerDoc()->GetWindow();
if (!window) {
return NS_ERROR_INVALID_ARG;
}
nsCOMPtr<EventTarget> target = window->GetParentTarget();
if (!target) {
return NS_ERROR_INVALID_ARG;
}
EventDispatcher::DispatchDOMEvent(target, nullptr, mEvent,
nullptr, nullptr);
} else {
bool defaultActionEnabled; // This is not used because the caller is async
mTarget->DispatchEvent(mEvent, &defaultActionEnabled);
}
} else {
if (mDispatchChromeOnly) {
nsCOMPtr<nsINode> node = do_QueryInterface(mTarget);
MOZ_ASSERT(node, "ChromeOnly dispatch supported with Node targets only!");
nsContentUtils::DispatchChromeEvent(node->OwnerDoc(), node, mEventType,
mBubbles, false);
} else {
nsCOMPtr<nsIDOMEvent> event;
NS_NewDOMEvent(getter_AddRefs(event), mTarget, nullptr, nullptr);
nsresult rv = event->InitEvent(mEventType, mBubbles, false);
NS_ENSURE_SUCCESS(rv, rv);
event->SetTrusted(true);
bool dummy;
mTarget->DispatchEvent(event, &dummy);
}
}
return NS_OK;
}
nsresult
AsyncEventDispatcher::PostDOMEvent()
{
nsRefPtr<AsyncEventDispatcher> ensureDeletionWhenFailing = this;
return NS_DispatchToCurrentThread(this);
}
void
AsyncEventDispatcher::RunDOMEventWhenSafe()
{
nsRefPtr<AsyncEventDispatcher> ensureDeletionWhenFailing = this;
nsContentUtils::AddScriptRunner(this);
}
/******************************************************************************
* mozilla::LoadBlockingAsyncEventDispatcher
******************************************************************************/
LoadBlockingAsyncEventDispatcher::~LoadBlockingAsyncEventDispatcher()
{
if (mBlockedDoc) {
mBlockedDoc->UnblockOnload(true);
}
}
} // namespace mozilla