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/* Implementation of Objective-C "collection of delegates" object
Copyright (C) 1993 Free Software Foundation, Inc.
Written by: R. Andrew McCallum <mccallum@cs.rochester.edu>
Dept. of Computer Science, U. of Rochester, Rochester, NY 14627
This file is part of the GNU Objective-C Collection library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <coll/DelegateList.h>
@implementation DelegateList
+ initialize
{
return self;
}
+ alloc
{
return (id)class_create_instance(self);
}
+ new
{
return [[self alloc] init];
}
- init
{
_list = [[Array alloc] init];
_send_behavior = SEND_TO_ALL;
return self;
}
/* Archiving must mimic the above designated initializer */
- write: (TypedStream*)aStream
{
objc_write_type(aStream, @encode(unsigned char), &_send_behavior);
objc_write_object(aStream, _list);
return self;
}
- read: (TypedStream*)aStream
{
objc_write_type(aStream, @encode(unsigned char), &_send_behavior);
objc_read_object(aStream, &_list);
return self;
}
- free
{
[_list free];
return (id)object_dispose(self);
}
// MANIPULATING LIST OF DELEGATES;
- delegateListAddObject: anObject
{
[_list addObject: anObject];
return self;
}
- delegateListAddObjectIfAbsent: anObject
{
[_list addObjectIfAbsent: anObject];
return self;
}
- delegateListRemoveObject: anObject
{
return [_list removeObject:anObject];
}
- (BOOL) delegateListIncludesObject: anObject
{
return [_list includesObject:anObject];
}
- delegateListCollection
{
return _list;
}
- (unsigned char) delegateListSendBehavior
{
return _send_behavior;
}
- delegateListSetSendBehavior: (unsigned char)b
{
_send_behavior = b;
return self;
}
// FOR PASSING ALL OTHER MESSAGES TO DELEGATES;
- forward: (SEL)aSel :(arglist_t)argFrame
{
void *ret = 0;
elt delegate;
switch (_send_behavior)
{
case SEND_TO_ALL:
FOR_ARRAY(_list, delegate)
{
if ([delegate.id_u respondsTo:aSel])
ret = [delegate.id_u performv:aSel :argFrame];
}
FOR_ARRAY_END;
break;
case SEND_TO_FIRST_RESPONDER:
FOR_ARRAY(_list, delegate)
{
if ([delegate.id_u respondsTo:aSel])
return [delegate.id_u performv:aSel :argFrame];
}
FOR_ARRAY_END;
break;
case SEND_UNTIL_YES:
FOR_ARRAY(_list, delegate)
{
if ([delegate.id_u respondsTo:aSel])
if ((ret = [delegate.id_u performv:aSel :argFrame]))
return ret;
}
FOR_ARRAY_END;
break;
case SEND_UNTIL_NO:
FOR_ARRAY(_list, delegate)
{
if ([delegate.id_u respondsTo:aSel])
if (!(ret = [delegate.id_u performv:aSel :argFrame]))
return ret;
}
FOR_ARRAY_END;
break;
}
return ret;
}
@end
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