pjs/xpfe/bootstrap/appleevents/nsAEGenericClass.cpp

956 строки
26 KiB
C++
Исходник Обычный вид История

2000-02-12 01:06:28 +03:00
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Simon Fraser <sfraser@netscape.com>
*/
#include "nsAEUtils.h"
#include "nsAETokens.h"
#include "nsAECoreClass.h"
#include "nsAEGenericClass.h"
/*----------------------------------------------------------------------------
AEGenericClass
----------------------------------------------------------------------------*/
AEGenericClass::AEGenericClass(DescType classType, DescType containerClass)
: mClass(classType)
, mContainerClass(containerClass)
, mItemFromContainerAccessor(nil)
{
// Window from null accessor used by the entire window hierarchy
mItemFromContainerAccessor = NewOSLAccessorProc(AEGenericClass::ItemFromContainerAccessor);
ThrowIfNil(mItemFromContainerAccessor);
OSErr err;
err = AEInstallObjectAccessor(mClass, containerClass,
mItemFromContainerAccessor,
(long)this,
false);
// although items of a given class can't contain other items of the same class,
// we need this accessor to support formRelativePostion,
// which sends us one item as a "container" and asks us to find
// either the item before or after that item
err = AEInstallObjectAccessor(mClass, mClass,
mItemFromContainerAccessor,
(long)this,
false);
ThrowIfOSErr(err);
}
/*----------------------------------------------------------------------------
~AEGenericClass
----------------------------------------------------------------------------*/
AEGenericClass::~AEGenericClass()
{
if (mItemFromContainerAccessor)
DisposeOSLAccessorUPP(mItemFromContainerAccessor);
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}
#pragma mark -
/*----------------------------------------------------------------------------
DispatchEvent
Handles all OSL messages that this object should handle
----------------------------------------------------------------------------*/
void AEGenericClass::DispatchEvent(AEDesc *token, const AppleEvent *appleEvent, AppleEvent *reply)
{
OSErr err = noErr;
AEEventID eventID;
OSType typeCode;
Size actualSize = 0L;
// Get the event ID
err = AEGetAttributePtr(appleEvent, keyEventIDAttr,
typeType,
&typeCode,
(Ptr)&eventID,
sizeof(eventID),
&actualSize);
ThrowIfOSErr(err);
try
{
switch (eventID)
{
case kAEClone:
HandleDuplicate(token, appleEvent, reply);
break;
case kAEClose:
HandleClose(token, appleEvent, reply);
break;
case kAECountElements:
HandleCount(token, appleEvent, reply);
break;
case kAECreateElement:
HandleMake(token, appleEvent, reply);
break;
case kAEDelete:
HandleDelete(token, appleEvent, reply);
break;
case kAEDoObjectsExist:
HandleExists(token, appleEvent, reply);
break;
case kAEGetData:
HandleGetData(token, appleEvent, reply);
break;
case kAEGetDataSize:
HandleDataSize(token, appleEvent, reply);
break;
case kAEMove:
HandleMove(token, appleEvent, reply);
break;
case kAEOpen: // == kAEOpenDocuments
HandleOpen(token, appleEvent, reply);
break;
case kAEPrint:
HandlePrint(token, appleEvent, reply);
break;
case kAEOpenApplication:
HandleRun(token, appleEvent, reply);
break;
case kAEQuitApplication:
HandleQuit(token, appleEvent, reply);
break;
case kAESave:
HandleSave(token, appleEvent, reply);
break;
case kAESetData:
HandleSetData(token, appleEvent, reply);
break;
// MT-NW suite
case kAEExtract:
HandleExtract(token, appleEvent, reply);
break;
case kAESendMessage:
HandleSendMessage(token, appleEvent, reply);
break;
default:
err = errAEEventNotHandled;
break;
}
}
catch (OSErr catchErr)
{
PutReplyErrorNumber(reply, catchErr);
throw;
}
catch ( ... )
{
PutReplyErrorNumber(reply, paramErr);
throw;
}
}
/*----------------------------------------------------------------------------
GetProperty
----------------------------------------------------------------------------*/
void AEGenericClass::GetProperty( DescType desiredClass,
const AEDesc* containerToken,
DescType containerClass,
DescType keyForm,
const AEDesc* keyData,
AEDesc* resultToken)
{
// call the base class utility method, which calls back up to the object
GetPropertyFromListOrObject(desiredClass, containerToken, containerClass, keyForm, keyData, resultToken);
}
#pragma mark -
/*----------------------------------------------------------------------------
ItemFromContainerAccessor
Callback for getting an item from its container
----------------------------------------------------------------------------*/
pascal OSErr AEGenericClass::ItemFromContainerAccessor( DescType desiredClass, // cWindow
const AEDesc* containerToken, // null container
DescType containerClass, // cApplication
DescType keyForm,
const AEDesc* keyData,
AEDesc* resultToken, // specified window is returned in result
long refCon)
{
AEGenericClass* itemClass = reinterpret_cast<AEGenericClass *>(refCon);
if (!itemClass) return paramErr;
OSErr err = noErr;
try
{
itemClass->GetItemFromContainer(desiredClass, containerToken, containerClass, keyForm, keyData, resultToken);
}
catch(OSErr catchErr)
{
err = catchErr;
}
catch(...)
{
err = paramErr;
}
return err;
}
#pragma mark -
/*----------------------------------------------------------------------------
HandleClose
----------------------------------------------------------------------------*/
void AEGenericClass::HandleClose(AEDesc *token, const AppleEvent *appleEvent, AppleEvent *reply)
{
ThrowIfOSErr(errAEEventNotHandled);
}
/*----------------------------------------------------------------------------
HandleCount
----------------------------------------------------------------------------*/
void AEGenericClass::HandleCount(AEDesc *token, const AppleEvent *appleEvent, AppleEvent *reply)
{
ConstAETokenDesc tokenDesc(token);
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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);
}
/*----------------------------------------------------------------------------
HandleGetData
----------------------------------------------------------------------------*/
void AEGenericClass::HandleGetData(AEDesc *tokenOrTokenList, const AppleEvent *appleEvent, AppleEvent *reply)
{
OSErr err = noErr;
StAEDesc data;
StAEDesc desiredTypes;
(void)AEGetParamDesc(appleEvent, keyAERequestedType, typeAEList, &desiredTypes);
GetDataFromListOrObject(tokenOrTokenList, &desiredTypes, &data);
if (reply->descriptorType != typeNull)
{
err = AEPutKeyDesc(reply, keyDirectObject, &data);
ThrowIfOSErr(err);
}
}
/*----------------------------------------------------------------------------
HandleSetData
----------------------------------------------------------------------------*/
void AEGenericClass::HandleSetData(AEDesc *token, const AppleEvent *appleEvent, AppleEvent *reply)
{
SetDataForListOrObject(token, appleEvent, reply);
}
/*----------------------------------------------------------------------------
HandleDataSize
----------------------------------------------------------------------------*/
void AEGenericClass::HandleDataSize(AEDesc *token, const AppleEvent *appleEvent, AppleEvent *reply)
{
ThrowIfOSErr(errAEEventNotHandled);
}
/*----------------------------------------------------------------------------
HandleDelete
All attempts to delete an empty list are handled here
Application contains documents and windows, and they can't be deleted
----------------------------------------------------------------------------*/
void AEGenericClass::HandleDelete(AEDesc *token, const AppleEvent *appleEvent, AppleEvent *reply)
{
ThrowIfOSErr(errAEEventNotHandled);
}
/*----------------------------------------------------------------------------
HandleDuplicate
----------------------------------------------------------------------------*/
void AEGenericClass::HandleDuplicate(AEDesc *token, const AppleEvent *appleEvent, AppleEvent *reply)
{
ThrowIfOSErr(errAEEventNotHandled);
}
/*----------------------------------------------------------------------------
HandleExists
If <anObject> exists...
The AEResolve() function in AERCoreSuite.c will already have filtered
out all cases where the object did not exist, so this function should
always return TRUE.
----------------------------------------------------------------------------*/
void AEGenericClass::HandleExists(AEDesc *token, const AppleEvent *appleEvent, AppleEvent *reply)
{
OSErr err;
Boolean foundIt = true;
err = AEPutParamPtr(reply,
keyAEResult,
typeBoolean,
(Ptr)&foundIt,
sizeof(Boolean));
ThrowIfOSErr(err);
}
/*----------------------------------------------------------------------------
HandleMake
----------------------------------------------------------------------------*/
void AEGenericClass::HandleMake(AEDesc *token, const AppleEvent *appleEvent, AppleEvent *reply)
{
DescType insertionPos = typeNull;
OSErr err = noErr;
StAEDesc insertionLoc;
StAEDesc objectSpec;
// For Create Element, the object specifier is contained in
// a typeInsertionLoc record instead of in a direct parameter.
// We coerce the insertionLoc record into an AERecord so we can extract the fields.
// Notice that this is a REQUIRED parameter, but we give it a default behavior
// by creating a new element at beginning of the first document
err = ::AEGetParamDesc(appleEvent, // Extract as a AERecord
keyAEInsertHere,
typeAERecord,
&insertionLoc);
if (err == errAEDescNotFound)
{
insertionPos = kAEBeginning;
err = noErr;
}
else if (err == noErr)
{
// Get the enumerated insertion location (at end, in front, before, after, replace.)
OSType typeCode;
Size actualSize;
err = ::AEGetKeyPtr(&insertionLoc,
keyAEPosition, // insertion location
typeEnumeration,
&typeCode,
(Ptr)&insertionPos,
sizeof(insertionPos),
&actualSize);
// Extract and resolve the object specifier from the insertion location record.
// In a case like "make new rectangle before rectangle 1 of document 1",
// the ospec will resolve to "rectangle 1 of document 1"
err = ::AEGetKeyDesc(&insertionLoc,
keyAEObject,
typeWildCard,
&objectSpec);
}
// if there was a object specifier in the insertion location (eg, "before rectangle 1 of document 1"),
// then we call AEResolve() to get a token for it,
// Otherwise, is was something like "at end" or "at beginning", which is also OK,
// then deal with it correctly later.
if (objectSpec.descriptorType == typeNull)
{
::AEDisposeDesc(token); // destroy it's old representation, token will now be null descriptor
}
else
{
err = ::AEResolve(&objectSpec,
kAEIDoMinimum,
token); // token will contain info about the object to insert before, after, etc.
ThrowIfOSErr(err);
}
// Extract the optional parameters from the AppleEvent
// ----- [with data ....] -----
StAEDesc withData;
const AEDesc* withDataPtr = nil;
err = ::AEGetParamDesc(appleEvent,
keyAEData,
typeWildCard,
&withData);
if (err == errAEDescNotFound)
err = noErr;
else
{
ThrowIfOSErr(err);
withDataPtr = &withData;
}
// ----- [with properties {property: value, ...}] -----
StAEDesc withProperties;
const AEDesc* withPropertiesPtr = nil;
err = AEGetParamDesc(appleEvent,
keyAEPropData,
typeWildCard,
&withProperties);
if (err == errAEDescNotFound)
err = noErr;
else
{
ThrowIfOSErr(err);
withPropertiesPtr = &withProperties;
}
// Finally, use the token and other parameters to create & initialize the object
MakeNewObject(insertionPos, token, withDataPtr, withPropertiesPtr, reply);
}
/*----------------------------------------------------------------------------
HandleMove
----------------------------------------------------------------------------*/
void AEGenericClass::HandleMove(AEDesc *token, const AppleEvent *appleEvent, AppleEvent *reply)
{
ThrowIfOSErr(errAEEventNotHandled);
}
/*----------------------------------------------------------------------------
HandleOpen
----------------------------------------------------------------------------*/
void AEGenericClass::HandleOpen(AEDesc *token, const AppleEvent *appleEvent, AppleEvent *reply)
{
ThrowIfOSErr(errAEEventNotHandled);
}
/*----------------------------------------------------------------------------
HandleRun
----------------------------------------------------------------------------*/
void AEGenericClass::HandleRun(AEDesc *token, const AppleEvent *appleEvent, AppleEvent *reply)
{
ThrowIfOSErr(errAEEventNotHandled);
}
/*----------------------------------------------------------------------------
HandlePrint
----------------------------------------------------------------------------*/
void AEGenericClass::HandlePrint(AEDesc *token, const AppleEvent *appleEvent, AppleEvent *reply)
{
ThrowIfOSErr(errAEEventNotHandled);
}
/*----------------------------------------------------------------------------
HandleQuit
----------------------------------------------------------------------------*/
void AEGenericClass::HandleQuit(AEDesc *token, const AppleEvent *appleEvent, AppleEvent *reply)
{
ThrowIfOSErr(errAEEventNotHandled);
}
/*----------------------------------------------------------------------------
HandleSave
----------------------------------------------------------------------------*/
void AEGenericClass::HandleSave(AEDesc *token, const AppleEvent *appleEvent, AppleEvent *reply)
{
ThrowOSErr(errAEEventNotHandled);
}
/*----------------------------------------------------------------------------
HandleExtract
----------------------------------------------------------------------------*/
void AEGenericClass::HandleExtract(AEDesc *token, const AppleEvent *appleEvent, AppleEvent *reply)
{
ThrowOSErr(errAEEventNotHandled);
}
/*----------------------------------------------------------------------------
HandleSendMessage
----------------------------------------------------------------------------*/
void AEGenericClass::HandleSendMessage(AEDesc *token, const AppleEvent *appleEvent, AppleEvent *reply)
{
ThrowOSErr(errAEEventNotHandled);
}
#pragma mark -
/*----------------------------------------------------------------------------
CompareObjects
----------------------------------------------------------------------------*/
void AEGenericClass::CompareObjects( DescType comparisonOperator,
const AEDesc * object,
const AEDesc * descriptorOrObject,
Boolean * result)
{
ThrowOSErr(errAEEventNotHandled);
}
/*----------------------------------------------------------------------------
CountObjects
----------------------------------------------------------------------------*/
void AEGenericClass::CountObjects( DescType desiredType,
DescType containerClass,
const AEDesc * container,
long * result)
{
ThrowOSErr(errAEEventNotHandled);
}
#pragma mark -
/*----------------------------------------------------------------------------
GetDataFromListOrObject
----------------------------------------------------------------------------*/
void AEGenericClass::GetDataFromListOrObject(const AEDesc *tokenOrTokenList, AEDesc *desiredTypes, AEDesc *data)
{
if (AEListUtils::TokenContainsTokenList(tokenOrTokenList) == false)
{
GetDataFromObject(tokenOrTokenList, desiredTypes, data);
}
else
{
ThrowIfOSErr(AECreateList(nil, 0, false, data));
GetDataFromList(tokenOrTokenList, desiredTypes, data);
}
}
/*----------------------------------------------------------------------------
GetDataFromListOrObject
----------------------------------------------------------------------------*/
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);
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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);
}
}
/*----------------------------------------------------------------------------
GetDataFromList
----------------------------------------------------------------------------*/
void AEGenericClass::GetDataFromList(const AEDesc *srcList, AEDesc *desiredTypes, AEDesc *dstList)
{
OSErr err;
long itemNum;
long numItems;
DescType keyword;
StAEDesc srcItem;
StAEDesc dstItem;
err = AECountItems((AEDescList*)srcList, &numItems);
ThrowIfOSErr(err);
for (itemNum = 1; itemNum <= numItems; itemNum++)
{
err = AEGetNthDesc(srcList, itemNum, typeWildCard, &keyword, &srcItem);
ThrowIfOSErr(err);
if (AEListUtils::TokenContainsTokenList(&srcItem) == false)
{
GetDataFromObject(&srcItem, desiredTypes, &dstItem); // Get data from single item
}
else
{
ThrowIfOSErr(AECreateList(nil, 0, false, &dstItem));
GetDataFromList(&srcItem, desiredTypes, &dstItem);
}
err = AEPutDesc(dstList, itemNum, &dstItem);
ThrowIfOSErr(err);
}
}
/*----------------------------------------------------------------------------
GetDataFromObject
----------------------------------------------------------------------------*/
void AEGenericClass::GetDataFromObject(const AEDesc *token, AEDesc *desiredTypes, AEDesc *data)
{
ConstAETokenDesc tokenDesc(token);
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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);
}
/*----------------------------------------------------------------------------
SetDataForList
Given a token that contains a list of cWindow tokens,
walk the list recursively to set the data for each token in the list
----------------------------------------------------------------------------*/
void AEGenericClass::SetDataForList(const AEDesc *token, AEDesc *data)
{
OSErr err;
if (AEListUtils::TokenContainsTokenList(token) == false)
{
SetDataForObject(token, data);
}
else
{
long numItems;
long itemNum;
err = AECountItems((AEDescList*)token, &numItems);
ThrowIfOSErr(err);
for (itemNum = 1; itemNum <= numItems; itemNum++)
{
StAEDesc tempToken;
AEKeyword keyword;
err = AEGetNthDesc((AEDescList*)token, itemNum, typeWildCard, &keyword, &tempToken);
ThrowIfOSErr(err);
if (AEListUtils::TokenContainsTokenList(&tempToken) == false)
{
SetDataForObject(&tempToken, data); // Set data from single item
}
else
{
SetDataForList(&tempToken, data); // Recurse sublist
}
}
}
}
/*----------------------------------------------------------------------------
CanGetProperty
----------------------------------------------------------------------------*/
DescType AEGenericClass::GetKeyEventDataAs(DescType propertyCode)
{
return typeWildCard;
}
#pragma mark -
/*----------------------------------------------------------------------------
CanGetProperty
----------------------------------------------------------------------------*/
Boolean AEGenericClass::CanGetProperty(DescType propertyCode)
{
Boolean canGet = false;
switch (propertyCode)
{
case pContents:
canGet = true;
break;
}
return canGet;
}
/*----------------------------------------------------------------------------
CanSetProperty
----------------------------------------------------------------------------*/
Boolean AEGenericClass::CanSetProperty(DescType propertyCode)
{
return false;
}
#pragma mark -
/*----------------------------------------------------------------------------
CreateSpecifier
Subclasses should not need to override this. It
----------------------------------------------------------------------------*/
void AEGenericClass::CreateSpecifier(const AEDesc *token, AEDesc *outSpecifier)
{
CreateSelfSpecifier(token, outSpecifier);
}
/*----------------------------------------------------------------------------
GetContainerSpecifier
----------------------------------------------------------------------------*/
void AEGenericClass::GetContainerSpecifier(const AEDesc *token, AEDesc *outContainerSpecifier)
{
outContainerSpecifier->descriptorType = typeNull;
outContainerSpecifier->dataHandle = nil;
AEDispatchHandler* handler = AECoreClass::GetDispatchHandlerForClass(mContainerClass);
if (handler)
{
handler->CreateSelfSpecifier(token, outContainerSpecifier);
}
}
#pragma mark -
/*----------------------------------------------------------------------------
GetPropertyFromListOrObject
----------------------------------------------------------------------------*/
void AEGenericClass::GetPropertyFromListOrObject( DescType desiredClass,
const AEDesc* containerToken,
DescType containerClass,
DescType keyForm,
const AEDesc* keyData,
AEDesc* resultToken)
{
if (AEListUtils::TokenContainsTokenList((AEDescList*)containerToken) == false)
{
GetPropertyFromObject(desiredClass, containerToken, containerClass, keyForm, keyData, resultToken);
}
else
{
OSErr err = AECreateList(nil, 0, false, resultToken);
ThrowIfOSErr(err);
GetPropertyFromList(desiredClass, containerToken, containerClass, keyForm, keyData, resultToken);
}
}
/*----------------------------------------------------------------------------
GetPropertyFromList
----------------------------------------------------------------------------*/
void AEGenericClass::GetPropertyFromList( DescType desiredClass,
const AEDesc* containerToken,
DescType containerClass,
DescType keyForm,
const AEDesc* keyData,
AEDesc* resultToken)
{
OSErr err = noErr;
long itemNum;
long numItems;
DescType keyword;
err = AECountItems((AEDescList*)containerToken, &numItems);
ThrowIfOSErr(err);
for (itemNum = 1; itemNum <= numItems; itemNum++)
{
StAEDesc srcItem;
StAEDesc dstItem;
err = AEGetNthDesc(containerToken, itemNum, typeWildCard, &keyword, &srcItem);
ThrowIfOSErr(err);
if (AEListUtils::TokenContainsTokenList(&srcItem) == false)
{
GetPropertyFromObject(desiredClass, &srcItem, containerClass, keyForm, keyData, &dstItem);
}
else
{
err = AECreateList(nil, 0, false, &dstItem);
ThrowIfOSErr(err);
GetPropertyFromList(desiredClass, &srcItem, containerClass, keyForm, keyData, &dstItem);
}
err = AEPutDesc(resultToken, itemNum, &dstItem);
ThrowIfOSErr(err);
}
}
/*----------------------------------------------------------------------------
GetPropertyFromObject
----------------------------------------------------------------------------*/
void AEGenericClass::GetPropertyFromObject( DescType desiredType,
const AEDesc* containerToken,
DescType containerClass,
DescType keyForm,
const AEDesc* keyData,
AEDesc* resultToken)
{
OSErr err;
DescType requestedProperty;
err = AEDuplicateDesc(containerToken, resultToken);
ThrowIfOSErr(err);
requestedProperty = **(DescType**)(keyData->dataHandle);
if (requestedProperty == kAEAll || requestedProperty == keyAEProperties)
requestedProperty = pProperties;
if (CanGetProperty(requestedProperty) || CanSetProperty(requestedProperty))
{
AETokenDesc resultTokenDesc(resultToken);
resultToken->descriptorType = desiredType;
resultTokenDesc.SetPropertyCode(requestedProperty);
}
else
{
ThrowIfOSErr(errAEEventNotHandled);
}
}
#pragma mark -
/*----------------------------------------------------------------------------
MakeNewObject
----------------------------------------------------------------------------*/
void AEGenericClass::MakeNewObject( const DescType insertionPosition,
const AEDesc* token,
const AEDesc* ptrToWithData,
const AEDesc* ptrToWithProperties,
AppleEvent* reply)
{
ThrowOSErr(errAEEventNotHandled);
}