JSBool JavaObject::getProperty(JSContext* ctx, JSObject* obj, jsid id,
jsval* rval) {
Debug::log(Debug::Spam) << "JavaObject::getProperty obj=" << obj << Debug::flush;
SessionData* data = JavaObject::getSessionData(ctx, obj);
if (!data) {
// TODO: replace the frame with an error page instead?
*rval = JSVAL_VOID;
return JS_TRUE;
}
int objectRef = JavaObject::getObjectId(ctx, obj);
if (JSID_IS_STRING(id)) {
JSString* str = JSID_TO_STRING(id);
if ((JS_GetStringEncodingLength(ctx, str) == 8) && !strncmp("toString",
JS_EncodeString(ctx, str), 8)) {
*rval = data->getToStringTearOff();
return JS_TRUE;
}
if ((JS_GetStringEncodingLength(ctx, str) == 2) && !strncmp("id",
JS_EncodeString(ctx, str), 2)) {
*rval = INT_TO_JSVAL(objectRef);
return JS_TRUE;
}
if ((JS_GetStringEncodingLength(ctx, str) == 16) && !strncmp("__noSuchMethod__",
JS_EncodeString(ctx, str), 16)) {
// Avoid error spew if we are disconnected
*rval = JSVAL_VOID;
return JS_TRUE;
}
Debug::log(Debug::Error) << "Getting unexpected string property "
<< dumpJsVal(ctx, id) << Debug::flush;
// TODO: throw a better exception here
return JS_FALSE;
}
if (!JSID_IS_INT(id)) {
Debug::log(Debug::Error) << "Getting non-int/non-string property "
<< dumpJsVal(ctx, id) << Debug::flush;
// TODO: throw a better exception here
return JS_FALSE;
}
int dispId = JSID_TO_INT(id);
HostChannel* channel = data->getHostChannel();
SessionHandler* handler = data->getSessionHandler();
Value value = ServerMethods::getProperty(*channel, handler, objectRef, dispId);
data->makeJsvalFromValue(*rval, ctx, value);
return JS_TRUE;
}
void FFSessionHandler::getToStringTearOff(JSContext* ctx) {
jsval funcVal;
Debug::log(Debug::Debugging) << "Getting function \"__gwt_makeTearOff\""
<< Debug::flush;
if (!JS_GetProperty(ctx, global, "__gwt_makeTearOff", &funcVal)
|| funcVal == JSVAL_VOID) {
Debug::log(Debug::Error) << "Could not get function \"__gwt_makeTearOff\""
<< Debug::flush;
return;
}
jsval jsargs[3] = {
JSVAL_NULL, // no proxy
INT_TO_JSVAL(InvokeMessage::TOSTRING_DISP_ID), // dispId
JSVAL_ZERO // arg count is zero
};
if (!JS_CallFunctionValue(ctx, global, funcVal, 3, jsargs, &toStringTearOff)) {
jsval exc;
if (JS_GetPendingException(ctx, &exc)) {
Debug::log(Debug::Error)
<< "__gwt_makeTearOff(null,0,0) threw exception "
<< dumpJsVal(ctx, exc) << Debug::flush;
} else {
Debug::log(Debug::Error) << "Error creating toString tear-off"
<< Debug::flush;
}
// TODO(jat): show some crash page and die
}
}
/**
* Called when the JavaObject is invoked as a function.
* We ignore the JSObject* argument, which is the 'this' context, which is
* usually the window object. The JavaObject instance is in argv[-2].
*
* Returns a JS array, with the first element being a boolean indicating that
* an exception occured, and the second element is either the return value or
* the exception which was thrown. In this case, we always return false and
* raise the exception ourselves.
*/
JSBool JavaObject::call(JSContext* ctx, JSObject*, uintN argc, jsval* argv,
jsval* rval) {
// Get the JavaObject called as a function
JSObject* obj = JSVAL_TO_OBJECT(argv[-2]);
if (argc < 2 || !JSVAL_IS_INT(argv[0]) ||
#ifdef JSVAL_IS_OBJECT
!JSVAL_IS_OBJECT(argv[1])) {
#else
(JSVAL_IS_PRIMITIVE(argv[1]) && !JSVAL_IS_NULL(argv[1]))) {
#endif
Debug::log(Debug::Error) << "JavaObject::call incorrect arguments" << Debug::flush;
return JS_FALSE;
}
int dispId = JSVAL_TO_INT(argv[0]);
if (Debug::level(Debug::Spam)) {
Debug::DebugStream& dbg = Debug::log(Debug::Spam) << "JavaObject::call oid="
<< JavaObject::getObjectId(ctx, obj) << ",dispId=" << dispId << " (";
for (unsigned i = 2; i < argc; ++i) {
if (i > 2) {
dbg << ", ";
}
dbg << dumpJsVal(ctx, argv[i]);
}
dbg << ")" << Debug::flush;
}
SessionData* data = JavaObject::getSessionData(ctx, obj);
if (!data) {
*rval = JSVAL_VOID;
return JS_TRUE;
}
Debug::log(Debug::Spam) << "Data = " << data << Debug::flush;
gwt::Value javaThis;
if (!JSVAL_IS_NULL(argv[1])) {
JSObject* thisObj = JSVAL_TO_OBJECT(argv[1]);
if (isJavaObject(ctx, thisObj)) {
javaThis.setJavaObject(getObjectId(ctx, thisObj));
} else {
data->makeValueFromJsval(javaThis, ctx, argv[1]);
}
} else {
int oid = getObjectId(ctx, obj);
javaThis.setJavaObject(oid);
}
return invokeJava(ctx, data, javaThis, dispId, argc - 2, &argv[2], rval);
}
