libs-gui/Model/IMLoading.m

/*
   IMLoading.m

   Copyright (C) 1996 Free Software Foundation, Inc.

   Author: Ovidiu Predescu <ovidiu@net-community.com>
   Date: November 1997
   
   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 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.
*/

#import <Foundation/NSDictionary.h>
#import <Foundation/NSArray.h>
#include <extensions/GMArchiver.h>
#include "IMLoading.h"
#include "IMCustomObject.h"

void __dummy_IMLoading_functionForLinking()
{
  __dummy_IMLoading_functionForLinking();
}

@implementation NSBundle (IMLoading)

+ (BOOL)loadIMFile:(NSString*)path owner:(id)owner
{
  return [GMModel loadIMFile:path owner:owner];
}

@end /* NSBundle(IMLoading) */


@implementation GMModel

id _nibOwner = nil;
BOOL _fileOwnerDecoded = NO;

+ (void)initialize
{
  /* Force linking of AppKit GModel categories */
  extern void __dummy_GMAppKit_functionForLinking();
  __dummy_GMAppKit_functionForLinking ();
}

+ (BOOL)loadIMFile:(NSString*)path owner:(id)owner
{
  GMUnarchiver* unarchiver = [GMUnarchiver unarchiverWithContentsOfFile:path];
  id previousNibOwner = _nibOwner;
  GMModel* decoded;

  if (!unarchiver)
    return NO;

  /* Set the _nibOwner to `owner' so that the first decoded custom object
     replaces itself with `owner'. Also set _fileOwnerDecoded so that the
     first custom object knows it's the first. */
  _nibOwner = owner;
  _fileOwnerDecoded = NO;

  decoded = [unarchiver decodeObjectWithName:@"RootObject"];
  [decoded _makeConnections];

  /* Restore the previous nib owner. We do this because loadIMFile:owner: can
     be invoked recursively. */
  _nibOwner = previousNibOwner;

  return YES;
}

- (void)_makeConnections
{
  int i, count;

  [connections makeObjectsPerform:@selector(establishConnection)];

  /* Send the -awakeFromModel method */
  for (i = 0, count = [objects count]; i < count; i++) {
    id object = [[objects objectAtIndex:i] nibInstantiate];

    if ([object respondsToSelector:@selector(awakeFromModel)])
      [object awakeFromModel];
  }
}

- (void)dealloc
{
  [objects release];
  [connections release];
  [super dealloc];
}

- (void)_setObjects:_objects connections:_connections
{
  objects = [_objects retain];
  connections = [_connections retain];
}

- (void)encodeWithModelArchiver:(GMArchiver*)archiver
{
  [archiver encodeObject:objects withName:@"Objects"];
  [archiver encodeObject:connections withName:@"Connections"];
}

- (id)initWithModelUnarchiver:(GMUnarchiver*)unarchiver
{
  objects = [[unarchiver decodeObjectWithName:@"Objects"] retain];
  connections = [[unarchiver decodeObjectWithName:@"Connections"] retain];
  return self;
}

@end /* GMModel */


#if GNU_RUNTIME
#import "IMConnectors.h"

static void __dummyFunctionForLinking (void)
{
  [IMCustomObject new];
  [IMConnector new];

  __dummyFunctionForLinking();
}

#endif