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//
// Lynkeos
// $Id: MySizeLock.m,v 1.2 2004/09/02 22:43:31 j-etienne Exp $
//
// Created by Jean-Etienne LAMIAUD on Mon Aug 16 2004.
// Copyright (c) 2004. Jean-Etienne LAMIAUD
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
#import "MySizeLock.h"
@interface MySizeCount : NSObject
{
@public
MyIntegerSize _size;
int _count;
}
- (id) initSizeCountWithSize :(MyIntegerSize)size ;
+ (MySizeCount*) sizeCountWithSize :(MyIntegerSize)size ;
@end
@implementation MySizeCount
- (id) initSizeCountWithSize :(MyIntegerSize)size
{
[self init];
_size = size;
_count = 1;
return( self );
}
+ (MySizeCount*) sizeCountWithSize :(MyIntegerSize)size
{
return( [[[self alloc] initSizeCountWithSize :size] autorelease] );
}
@end
@implementation MySizeLock
// Accessors
- (BOOL) locked { return _locked; }
- (MyIntegerSize) size
{
if ( [_sizeList count] == 1 )
return( ((MySizeCount*)[_sizeList lastObject])->_size );
else
return( MyMakeIntegerSize(0,0) );
}
// Actions
- (BOOL) lockSize
{
BOOL ret = YES;
int cnt = [_sizeList count];
if ( cnt == 0 || cnt == 1 )
_locked = YES;
else
ret = NO;
return ret;
}
- (void) unlockSize
{
_locked = NO;
}
- (BOOL) addSize :(MyIntegerSize)size
{
BOOL ret = YES;
NSEnumerator *iter = [_sizeList objectEnumerator];
MySizeCount* obj;
// Find the size in the list
while ( (obj = [iter nextObject]) != nil &&
obj->_size.width != size.width && obj->_size.height != size.height )
;
// If found, count one more
if ( obj != nil )
obj->_count++;
else
{
// Otherwise, adding a new size is allowed only if not locked
if ( _locked && [_sizeList count] != 0 )
ret = NO;
else
[_sizeList addObject:[MySizeCount sizeCountWithSize:size]];
}
return( ret );
}
- (void) removeSize :(MyIntegerSize)size
{
NSEnumerator *iter = [_sizeList objectEnumerator];
MySizeCount* obj;
// Find the size in the list
while ( (obj = [iter nextObject]) != nil &&
obj->_size.width != size.width && obj->_size.height != size.height )
;
NSAssert( obj != nil, @"Cannot remove inexistent size" );
obj->_count--;
NSAssert( obj->_count >= 0, @"Size count becomes negative" );
if ( obj->_count == 0 )
[_sizeList removeObject :obj];
}
// Constructors
- (id) init
{
[super init];
_locked = NO;
_sizeList = [[NSMutableArray array] retain];
return( self );
}
+ (id) sizeLock
{
return( [[[self alloc] init] autorelease] );
}
@end
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