libs-gui/Source/NSController.m

/** <title>NSController</title>

   <abstract>abstract base class for controllers</abstract>

   Copyright <copy>(C) 2006 Free Software Foundation, Inc.</copy>

   Author: Fred Kiefer <fredkiefer@gmx.de>
   Date: June 2006

   This file is part of the GNUstep GUI Library.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with this library; see the file COPYING.LIB.
   If not, see <http://www.gnu.org/licenses/> or write to the 
   Free Software Foundation, 51 Franklin Street, Fifth Floor, 
   Boston, MA 02110-1301, USA.
*/

#import <Foundation/NSArray.h>
#import <Foundation/NSArchiver.h>
#import <Foundation/NSKeyedArchiver.h>
#import "AppKit/NSController.h"

@implementation NSController

- (id) init
{
  if((self = [super init]) != nil)
    {
      _editors = [[NSMutableArray alloc] init];
      _declared_keys = [[NSMutableArray alloc] init];
    }
  
  return self;
}

- (void) dealloc
{
  RELEASE(_editors);
  RELEASE(_declared_keys);
  [super dealloc];
}

- (void) encodeWithCoder: (NSCoder *)aCoder
{ 
  if([aCoder allowsKeyedCoding])
    {
      [aCoder encodeObject: _declared_keys forKey: @"NSDeclaredKeys"];
    }
  else
    {
      [aCoder encodeObject: _declared_keys];
    }
}

- (id) initWithCoder: (NSCoder *)aDecoder
{ 
  if((self = [super init]) != nil)
    {
      if([aDecoder allowsKeyedCoding])
        {
          ASSIGN(_declared_keys,[aDecoder decodeObjectForKey: @"NSDeclaredKeys"]);
        }
      else
        {
          ASSIGN(_declared_keys,[aDecoder decodeObject]);
        }
    }
  return self; 
}

- (BOOL) isEditing
{
  return [_editors count] > 0;
}

- (BOOL) commitEditing
{
  unsigned c = [_editors count];
  unsigned i;

  for (i = 0; i < c; i++)
    {
      if (![[_editors objectAtIndex: i] commitEditing])
        {
          return NO;
        }
    }

  return YES;
}

- (void) commitEditingWithDelegate: (id)delegate
                 didCommitSelector: (SEL)didCommitSelector
                       contextInfo: (void*)contextInfo
{
  unsigned c = [_editors count];
  unsigned i;

  for (i = 0; i < c; i++)
    {
      BOOL didCommit = [[_editors objectAtIndex: i] commitEditing];
      if (delegate != nil && didCommitSelector != NULL)
        {
          void (*meth)(id, SEL, id, BOOL, void*);
          meth = (void (*)(id, SEL, id, BOOL, void*))[delegate methodForSelector: 
                                                                   didCommitSelector];
          if (meth)
            meth(delegate, didCommitSelector, self, didCommit, contextInfo);
        }
    }
}

- (void) discardEditing
{
  [_editors makeObjectsPerformSelector: @selector(discardEditing)];
}

- (void) objectDidBeginEditing: (id)editor
{
  [_editors addObject: editor];
}

- (void) objectDidEndEditing: (id)editor
{
  [_editors removeObject: editor];
}

@end