本文整理汇总了C++中JSEventHandler::SetHandler方法的典型用法代码示例。如果您正苦于以下问题：C++ JSEventHandler::SetHandler方法的具体用法？C++ JSEventHandler::SetHandler怎么用？C++ JSEventHandler::SetHandler使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类JSEventHandler的用法示例。
在下文中一共展示了JSEventHandler::SetHandler方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: listenerHolder
EventListenerManager::Listener*
EventListenerManager::SetEventHandlerInternal(
nsIAtom* aName,
const nsAString& aTypeString,
const TypedEventHandler& aTypedHandler,
bool aPermitUntrustedEvents)
{
MOZ_ASSERT(aName || !aTypeString.IsEmpty());
uint32_t eventType = nsContentUtils::GetEventId(aName);
Listener* listener = FindEventHandler(eventType, aName, aTypeString);
if (!listener) {
// If we didn't find a script listener or no listeners existed
// create and add a new one.
EventListenerFlags flags;
flags.mListenerIsJSListener = true;
nsCOMPtr<JSEventHandler> jsEventHandler;
NS_NewJSEventHandler(mTarget, aName,
aTypedHandler, getter_AddRefs(jsEventHandler));
EventListenerHolder listenerHolder(jsEventHandler);
AddEventListenerInternal(listenerHolder, eventType, aName, aTypeString,
flags, true);
listener = FindEventHandler(eventType, aName, aTypeString);
} else {
JSEventHandler* jsEventHandler = listener->GetJSEventHandler();
MOZ_ASSERT(jsEventHandler,
"How can we have an event handler with no JSEventHandler?");
bool same = jsEventHandler->GetTypedEventHandler() == aTypedHandler;
// Possibly the same listener, but update still the context and scope.
jsEventHandler->SetHandler(aTypedHandler);
if (mTarget && !same && aName) {
mTarget->EventListenerRemoved(aName);
mTarget->EventListenerAdded(aName);
}
if (mIsMainThreadELM && mTarget) {
EventListenerService::NotifyAboutMainThreadListenerChange(mTarget);
}
}
// Set flag to indicate possible need for compilation later
listener->mHandlerIsString = !aTypedHandler.HasEventHandler();
if (aPermitUntrustedEvents) {
listener->mFlags.mAllowUntrustedEvents = true;
}
return listener;
}示例2: url
//.........这里部分代码省略.........
element->GetAttr(kNameSpaceID_None, attrName, handlerBody);
body = &handlerBody;
aElement = element;
}
aListener = nullptr;
uint32_t lineNo = 0;
nsAutoCString url (NS_LITERAL_CSTRING("-moz-evil:lying-event-listener"));
MOZ_ASSERT(body);
MOZ_ASSERT(aElement);
nsIURI *uri = aElement->OwnerDoc()->GetDocumentURI();
if (uri) {
uri->GetSpec(url);
lineNo = 1;
}
nsCOMPtr<nsPIDOMWindow> win = do_QueryInterface(mTarget);
uint32_t argCount;
const char **argNames;
nsContentUtils::GetEventArgNames(aElement->GetNameSpaceID(),
typeAtom, win,
&argCount, &argNames);
JSAddonId *addonId = MapURIToAddonID(uri);
// Wrap the event target, so that we can use it as the scope for the event
// handler. Note that mTarget is different from aElement in the <body> case,
// where mTarget is a Window.
//
// The wrapScope doesn't really matter here, because the target will create
// its reflector in the proper scope, and then we'll enter that compartment.
JS::Rooted<JSObject*> wrapScope(cx, global->GetGlobalJSObject());
JS::Rooted<JS::Value> v(cx);
{
JSAutoCompartment ac(cx, wrapScope);
nsresult rv = nsContentUtils::WrapNative(cx, mTarget, &v,
/* aAllowWrapping = */ false);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
if (addonId) {
JS::Rooted<JSObject*> vObj(cx, &v.toObject());
JS::Rooted<JSObject*> addonScope(cx, xpc::GetAddonScope(cx, vObj, addonId));
if (!addonScope) {
return NS_ERROR_FAILURE;
}
JSAutoCompartment ac(cx, addonScope);
if (!JS_WrapValue(cx, &v)) {
return NS_ERROR_FAILURE;
}
}
JS::Rooted<JSObject*> target(cx, &v.toObject());
JSAutoCompartment ac(cx, target);
nsDependentAtomString str(attrName);
// Most of our names are short enough that we don't even have to malloc
// the JS string stuff, so don't worry about playing games with
// refcounting XPCOM stringbuffers.
JS::Rooted<JSString*> jsStr(cx, JS_NewUCStringCopyN(cx,
str.BeginReading(),
str.Length()));
NS_ENSURE_TRUE(jsStr, NS_ERROR_OUT_OF_MEMORY);
// Get the reflector for |aElement|, so that we can pass to setElement.
if (NS_WARN_IF(!WrapNewBindingObject(cx, target, aElement, &v))) {
return NS_ERROR_FAILURE;
}
JS::CompileOptions options(cx);
options.setIntroductionType("eventHandler")
.setFileAndLine(url.get(), lineNo)
.setVersion(JSVERSION_DEFAULT)
.setElement(&v.toObject())
.setElementAttributeName(jsStr)
.setDefineOnScope(false);
JS::Rooted<JSObject*> handler(cx);
result = nsJSUtils::CompileFunction(cx, target, options,
nsAtomCString(typeAtom),
argCount, argNames, *body, handler.address());
NS_ENSURE_SUCCESS(result, result);
NS_ENSURE_TRUE(handler, NS_ERROR_FAILURE);
if (jsEventHandler->EventName() == nsGkAtoms::onerror && win) {
nsRefPtr<OnErrorEventHandlerNonNull> handlerCallback =
new OnErrorEventHandlerNonNull(handler, /* aIncumbentGlobal = */ nullptr);
jsEventHandler->SetHandler(handlerCallback);
} else if (jsEventHandler->EventName() == nsGkAtoms::onbeforeunload && win) {
nsRefPtr<OnBeforeUnloadEventHandlerNonNull> handlerCallback =
new OnBeforeUnloadEventHandlerNonNull(handler, /* aIncumbentGlobal = */ nullptr);
jsEventHandler->SetHandler(handlerCallback);
} else {
nsRefPtr<EventHandlerNonNull> handlerCallback =
new EventHandlerNonNull(handler, /* aIncumbentGlobal = */ nullptr);
jsEventHandler->SetHandler(handlerCallback);
}
return result;
}