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Bug 807226 part 3. Change event handlers to call their WebIDL callbacks directly. r=smaug
This commit is contained in:
Boris Zbarsky
parent
bf51164dc8
commit
d15bb45f3e
@ -24,6 +24,8 @@
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#include "nsJSEnvironment.h"
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#include "nsDOMJSUtils.h"
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#include "mozilla/Likely.h"
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#include "mozilla/dom/UnionTypes.h"
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#ifdef DEBUG
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#include "nspr.h" // PR_fprintf
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@ -38,6 +40,7 @@ public:
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static EventListenerCounter sEventListenerCounter;
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#endif
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using namespace mozilla;
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using namespace mozilla::dom;
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/*
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@ -149,115 +152,98 @@ nsJSEventListener::HandleEvent(nsIDOMEvent* aEvent)
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if (!target || !mContext || !mHandler.HasEventHandler())
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return NS_ERROR_FAILURE;
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nsresult rv;
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nsCOMPtr<nsIMutableArray> iargv;
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if (mHandler.Type() == nsEventHandler::eOnError) {
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MOZ_ASSERT(mEventName == nsGkAtoms::onerror);
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nsString errorMsg, file;
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EventOrString msgOrEvent;
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Optional<nsAString> fileName;
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Optional<uint32_t> lineNumber;
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Optional<uint32_t> columnNumber;
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bool handledScriptError = false;
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if (mEventName == nsGkAtoms::onerror) {
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NS_ENSURE_TRUE(aEvent, NS_ERROR_UNEXPECTED);
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nsEvent* event = aEvent->GetInternalNSEvent();
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if (event->message == NS_LOAD_ERROR &&
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event->eventStructType == NS_SCRIPT_ERROR_EVENT) {
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nsScriptErrorEvent *scriptEvent =
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static_cast<nsScriptErrorEvent*>(event);
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// Create a temp argv for the error event.
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iargv = do_CreateInstance(NS_ARRAY_CONTRACTID, &rv);
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if (NS_FAILED(rv)) return rv;
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// Append the event args.
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nsCOMPtr<nsIWritableVariant>
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var(do_CreateInstance(NS_VARIANT_CONTRACTID, &rv));
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NS_ENSURE_SUCCESS(rv, rv);
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rv = var->SetAsWString(scriptEvent->errorMsg);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = iargv->AppendElement(var, false);
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NS_ENSURE_SUCCESS(rv, rv);
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// filename
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var = do_CreateInstance(NS_VARIANT_CONTRACTID, &rv);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = var->SetAsWString(scriptEvent->fileName);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = iargv->AppendElement(var, false);
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NS_ENSURE_SUCCESS(rv, rv);
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// line number
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var = do_CreateInstance(NS_VARIANT_CONTRACTID, &rv);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = var->SetAsUint32(scriptEvent->lineNr);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = iargv->AppendElement(var, false);
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NS_ENSURE_SUCCESS(rv, rv);
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errorMsg = scriptEvent->errorMsg;
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msgOrEvent.SetAsString() = static_cast<nsAString*>(&errorMsg);
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handledScriptError = true;
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file = scriptEvent->fileName;
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fileName = &file;
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lineNumber.Construct();
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lineNumber.Value() = scriptEvent->lineNr;
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} else {
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msgOrEvent.SetAsEvent() = aEvent;
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}
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nsRefPtr<OnErrorEventHandlerNonNull> handler =
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mHandler.OnErrorEventHandler();
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ErrorResult rv;
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bool handled = handler->Call(mTarget, msgOrEvent, fileName, lineNumber,
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columnNumber, rv);
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if (rv.Failed()) {
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return rv.ErrorCode();
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}
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if (handled) {
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aEvent->PreventDefault();
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}
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return NS_OK;
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}
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if (!handledScriptError) {
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iargv = do_CreateInstance(NS_ARRAY_CONTRACTID, &rv);
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if (NS_FAILED(rv)) return rv;
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NS_ENSURE_TRUE(iargv != nullptr, NS_ERROR_OUT_OF_MEMORY);
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rv = iargv->AppendElement(aEvent, false);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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if (mHandler.Type() == nsEventHandler::eOnBeforeUnload) {
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MOZ_ASSERT(mEventName == nsGkAtoms::onbeforeunload);
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// mContext is the same context which event listener manager pushes
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// to JS context stack.
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#ifdef DEBUG
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JSContext* cx = nullptr;
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nsCOMPtr<nsIJSContextStack> stack =
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do_GetService("@mozilla.org/js/xpc/ContextStack;1");
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NS_ASSERTION(stack && NS_SUCCEEDED(stack->Peek(&cx)) && cx &&
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GetScriptContextFromJSContext(cx) == mContext,
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"JSEventListener has wrong script context?");
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#endif
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nsCOMPtr<nsIVariant> vrv;
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xpc_UnmarkGrayObject(mScopeObject);
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rv = mContext->CallEventHandler(mTarget, mScopeObject,
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mHandler.Ptr()->Callable(),
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iargv, getter_AddRefs(vrv));
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nsRefPtr<BeforeUnloadEventHandlerNonNull> handler =
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mHandler.BeforeUnloadEventHandler();
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ErrorResult rv;
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nsString retval;
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handler->Call(mTarget, aEvent, retval, rv);
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if (rv.Failed()) {
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return rv.ErrorCode();
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}
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if (NS_SUCCEEDED(rv)) {
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uint16_t dataType = nsIDataType::VTYPE_VOID;
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if (vrv)
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vrv->GetDataType(&dataType);
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nsCOMPtr<nsIDOMBeforeUnloadEvent> beforeUnload = do_QueryInterface(aEvent);
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NS_ENSURE_STATE(beforeUnload);
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if (mEventName == nsGkAtoms::onbeforeunload) {
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nsCOMPtr<nsIDOMBeforeUnloadEvent> beforeUnload = do_QueryInterface(aEvent);
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NS_ENSURE_STATE(beforeUnload);
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if (!DOMStringIsNull(retval)) {
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aEvent->PreventDefault();
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if (dataType != nsIDataType::VTYPE_VOID) {
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aEvent->PreventDefault();
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nsAutoString text;
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beforeUnload->GetReturnValue(text);
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nsAutoString text;
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beforeUnload->GetReturnValue(text);
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// Set the text in the beforeUnload event as long as it wasn't
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// already set (through event.returnValue, which takes
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// precedence over a value returned from a JS function in IE)
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if ((dataType == nsIDataType::VTYPE_DOMSTRING ||
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dataType == nsIDataType::VTYPE_CHAR_STR ||
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dataType == nsIDataType::VTYPE_WCHAR_STR ||
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dataType == nsIDataType::VTYPE_STRING_SIZE_IS ||
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dataType == nsIDataType::VTYPE_WSTRING_SIZE_IS ||
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dataType == nsIDataType::VTYPE_CSTRING ||
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dataType == nsIDataType::VTYPE_ASTRING)
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&& text.IsEmpty()) {
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vrv->GetAsDOMString(text);
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beforeUnload->SetReturnValue(text);
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}
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}
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} else if (dataType == nsIDataType::VTYPE_BOOL) {
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// If the handler returned false and its sense is not reversed,
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// or the handler returned true and its sense is reversed from
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// the usual (false means cancel), then prevent default.
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bool brv;
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if (NS_SUCCEEDED(vrv->GetAsBool(&brv)) &&
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brv == (mEventName == nsGkAtoms::onerror ||
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mEventName == nsGkAtoms::onmouseover)) {
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aEvent->PreventDefault();
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// Set the text in the beforeUnload event as long as it wasn't
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// already set (through event.returnValue, which takes
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// precedence over a value returned from a JS function in IE)
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if (text.IsEmpty()) {
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beforeUnload->SetReturnValue(retval);
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}
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}
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return NS_OK;
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}
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return rv;
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MOZ_ASSERT(mHandler.Type() == nsEventHandler::eNormal);
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ErrorResult rv;
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nsRefPtr<EventHandlerNonNull> handler = mHandler.EventHandler();
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JS::Value retval = handler->Call(mTarget, aEvent, rv);
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if (rv.Failed()) {
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return rv.ErrorCode();
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}
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// If the handler returned false and its sense is not reversed,
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// or the handler returned true and its sense is reversed from
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// the usual (false means cancel), then prevent default.
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if (retval.isBoolean() &&
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retval.toBoolean() == (mEventName == nsGkAtoms::onerror ||
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mEventName == nsGkAtoms::onmouseover)) {
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aEvent->PreventDefault();
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}
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return NS_OK;
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}
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/*
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