void AEGenericClass::SetDataForListOrObject(const AEDesc *tokenOrTokenList, const AppleEvent *appleEvent, AppleEvent *reply)
{
StAEDesc data;
switch (tokenOrTokenList->descriptorType)
{
case typeAEList:
{
AECoreClass::GetAECoreHandler()->GetEventKeyDataParameter(appleEvent, typeWildCard, &data);
SetDataForList(tokenOrTokenList, &data);
}
break;
case cProperty:
{
ConstAETokenDesc tokenDesc(tokenOrTokenList);
DescType propertyCode = tokenDesc.GetPropertyCode();
//DescType objectClass = tokenDesc.GetObjectClass();
if (CanSetProperty(propertyCode))
{
AECoreClass::GetAECoreHandler()->GetEventKeyDataParameter(appleEvent, GetKeyEventDataAs(propertyCode), &data);
SetDataForObject(tokenOrTokenList, &data);
}
else
{
ThrowIfOSErr(errAENotModifiable);
}
}
break;
default:
ThrowIfOSErr(errAENotModifiable);
}
}
/*----------------------------------------------------------------------------
HandleCount
----------------------------------------------------------------------------*/
void AEGenericClass::HandleCount(AEDesc *token, const AppleEvent *appleEvent, AppleEvent *reply)
{
ConstAETokenDesc tokenDesc(token);
long numberOfObjects = 0;
DescType objectClass;
OSErr err = noErr;
if (!reply->dataHandle)
return;
// Get the class of object that we will count
err = GetObjectClassFromAppleEvent(appleEvent, &objectClass);
ThrowIfOSErr(err);
err = CheckForUnusedParameters(appleEvent);
ThrowIfOSErr(err);
if (AEListUtils::TokenContainsTokenList(token))
{
err = AECountItems(token, &numberOfObjects);
ThrowIfOSErr(err);
}
else
{
CountObjects(objectClass, tokenDesc.GetDispatchClass(), token, &numberOfObjects);
}
err = AEPutParamPtr(reply, keyAEResult,
typeLongInteger,
(Ptr)&numberOfObjects,
sizeof(long));
ThrowIfOSErr(err);
}
void AECoreClass::ExtractData(const AEDesc *source, AEDesc *data)
{
OSErr err = noErr;
StAEDesc temp;
DescType dispatchClass;
if ((source->descriptorType == typeNull) || (source->dataHandle == nil))
ThrowIfOSErr(errAENoSuchObject);
// If it's an object specifier, resolve into a token
// Otherwise, just copy it
if (source->descriptorType == typeObjectSpecifier)
{
err = AEResolve(source, kAEIDoMinimum, &temp);
}
else
{
err = AEDuplicateDesc(source, &temp);
}
ThrowIfOSErr(err);
// Next, determine which object should handle it, if any.
// If it's a property token, get the dispatch class.
// Otherwise, just get the descriptorType.
if (temp.descriptorType == typeProperty)
{
ConstAETokenDesc tokenDesc(&temp);
dispatchClass = tokenDesc.GetDispatchClass();
}
else
dispatchClass = temp.descriptorType;
// If it's a property token, get the data it refers to,
// otherwise duplicate it and return
AEDispatchHandler* handler = GetDispatchHandler(dispatchClass);
if (handler)
{
/*
case cApplication:
// why?
ThrowIfOSErr(errAEEventNotHandled);
break;
*/
handler->GetDataFromListOrObject(&temp, nil, data);
}
else
{
err = AEDuplicateDesc(&temp, data);
ThrowIfOSErr(err);
}
}
/*----------------------------------------------------------------------------
GetDataFromObject
----------------------------------------------------------------------------*/
void AEGenericClass::GetDataFromObject(const AEDesc *token, AEDesc *desiredTypes, AEDesc *data)
{
ConstAETokenDesc tokenDesc(token);
DescType propertyCode = tokenDesc.GetPropertyCode();
OSErr err = noErr;
switch (propertyCode)
{
case pContents:
case typeNull:
// must mean contents. Make a self specifier.
CreateSpecifier(token, data);
break;
default:
err = errAECantSupplyType;
break;
}
ThrowIfOSErr(err);
}
/*----------------------------------------------------------------------------
HandleCoreSuiteEvent
----------------------------------------------------------------------------*/
void AECoreClass::HandleCoreSuiteEvent(const AppleEvent *appleEvent, AppleEvent *reply)
{
StAEDesc directParameter;
StAEDesc token;
OSErr err = noErr;
// extract the direct parameter (an object specifier)
err = ::AEGetKeyDesc(appleEvent, keyDirectObject, typeWildCard, &directParameter);
ThrowIfOSErr(err);
DescType tokenType = typeNull;
DescType dispatchClass = typeNull;
// check for null descriptor, which AEResolve doesn't handle well
// If it's not null, then AEResolve will return an application-defined token
if (directParameter.descriptorType == typeNull)
{
token = directParameter; // can throw
}
else
{
// The direct parameter contains an object specifier, or an "reference" in
// AppleScript terminology, such as "rectangle 1 of document 1".
// AEResolve() will recursively call our installed object accessors
// until it returns a token with data referencing the requested object.
err = ::AEResolve(&directParameter, kAEIDoMinimum, &token);
}
if (err == errAENoSuchObject || err == errAEIllegalIndex)
{
// If we were executing an "Exists..." AppleEvent, we can reply it here
// because we have already determined that it DOES NOT exist.
// First, we get the event ID. We use "eventError" instead of "err"
// so that the result of AEGetAttributePtr() does not disturb the
// errAENoSuchObject result previously returned.
AEEventID eventID;
OSType typeCode;
Size actualSize = 0;
OSErr eventError = ::AEGetAttributePtr(appleEvent,
keyEventIDAttr,
typeType,
&typeCode,
(Ptr)&eventID, // Get the eventID from the AppleEvent
sizeof(eventID),
&actualSize);
// If event was an "Exists..." message, store the result (false) in the reply
// because AEResolve() returned errAENoSuchObject.
if (eventError == noErr && eventID == kAEDoObjectsExist)
{
Boolean foundIt = false;
(void)AEPutParamPtr(reply, keyAEResult, typeBoolean, (Ptr)&foundIt, sizeof(Boolean));
// Now, we set the err to noErr so that the scripting component doesn't complain
// that the object does not exist. We only do this if we were executing an "Exists..."
// event. Otherwise, the errAENoSuchObject will be returned.
ThrowNoErr();
}
ThrowIfOSErr(err);
return;
}
ThrowIfOSErr(err);
// Pass the token returned by AEResolve(), and the original AppleEvent event and reply,
// on to the appropriate object dispatcher
// The token type is, by convention, the same as class ID that handles this event.
// However, for property tokens, tokenType is cProperty for all objects, so
// we look inside the token at its dispatchClass to find out which class of object
// should really handle this AppleEvent.
// Also, if the resolver returned a list of objects in the token,
// the type will be typeAEList or one of our special list types, so
// we set the dispatch class based on the list type
// instead of on the type of the token itself
if (AEListUtils::TokenContainsTokenList(&token))
{
SInt32 numItems;
err = AECountItems(&token, &numItems);
if (numItems == 0) // could be an empty list
{
dispatchClass = typeNull;
}
else
{
StAEDesc tempToken;
err = AEListUtils::GetFirstNonListToken((AEDesc *)&token, &tempToken);
if (err == noErr && tempToken.descriptorType != typeNull)
{
ConstAETokenDesc tokenDesc(&tempToken);
dispatchClass = tokenDesc.GetDispatchClass();
}
else
{
dispatchClass = typeNull;
err = noErr;
}
}
}
else if (token.descriptorType == typeNull) // make sure we correctly handle things for cApplication that don't have a direct parameter
{
dispatchClass = typeNull;
}
else
{
ConstAETokenDesc tokenDesc(&token);
dispatchClass = tokenDesc.GetDispatchClass();
}
// why is this special-cased?
if (dispatchClass == cFile)
{
AEEventID eventID = 0;
OSType typeCode = 0;
Size actualSize = 0;
OSErr eventError = AEGetAttributePtr(appleEvent, keyEventIDAttr,
typeType,
&typeCode,
(Ptr)&eventID, // Get the eventID from the AppleEvent
sizeof(eventID),
&actualSize);
}
AEDispatchHandler* handler = GetDispatchHandler(dispatchClass);
if (!handler)
ThrowIfOSErr(errAEEventNotHandled);
handler->DispatchEvent(&token, appleEvent, reply);
}