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/* Implementation of Objective-C "collection of delegates" object
Copyright (C) 1993,1994 Free Software Foundation, Inc.
Written by: R. Andrew McCallum <mccallum@gnu.ai.mit.edu>
Date: May 1993
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 <objects/DelegatePool.h>
@implementation DelegatePool
+ 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 */
- (void) encodeWithCoder: (Coder*)anEncoder
{
[anEncoder encodeValueOfSimpleType:@encode(unsigned char)
at:&_send_behavior
withName:"DelegatePool Send Behavior"];
[anEncoder encodeObject:_list
withName:"DelegatePool Collection of Delegates"];
}
+ newWithCoder: (Coder*)aDecoder
{
DelegatePool *n = class_create_instance(self);
[aDecoder decodeValueOfSimpleType:@encode(unsigned char)
at:&(n->_send_behavior)
withName:NULL];
[aDecoder decodeObjectAt:&(n->_list)
withName:NULL];
return n;
}
- 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];
#if NeXT_runtime
return (id) object_dispose((Object*)self);
#else
return (id) object_dispose(self);
#endif
}
// MANIPULATING COLLECTION OF DELEGATES;
- delegatePoolAddObject: anObject
{
[_list addObject: anObject];
return self;
}
- delegatePoolAddObjectIfAbsent: anObject
{
[_list addObjectIfAbsent: anObject];
return self;
}
- delegatePoolRemoveObject: anObject
{
return [_list removeObject:anObject];
}
- (BOOL) delegatePoolIncludesObject: anObject
{
return [_list includesObject:anObject];
}
- delegatePoolCollection
{
return _list;
}
- (unsigned char) delegatePoolSendBehavior
{
return _send_behavior;
}
- delegatePoolSetSendBehavior: (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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