This is MiscDistributor.m in view mode; [Download] [Up]
//
// MiscDistributor.m -- An object which will pass a message on to any of
// the objects connected to it, even across .nib file boundaries.
//
// Written by Don Yacktman. Copyright 1994 by Don Yacktman.
// Version 1.0 All rights reserved.
//
// This notice may not be removed from this source code.
//
// This object is included in the MiscKit by permission from the author
// and its use is governed by the MiscKit license, found in the file
// "LICENSE.rtf" in the MiscKit distribution. Please refer to that file
// for a list of all applicable permissions and restrictions.
//
#import <appkit/appkit.h>
#import "MiscDistributor.h"
#define INSUBPROJ
#import "../_MiscDistributorConnection.h"
#import "../MiscDistributorPrivate.h"
static id distributors = nil; // to be a HashTable
#define CURRENT_VERSION 1
#define STARTINGCAPACITY 512 // you may need this a lot larger.
@implementation MiscDistributor(private)
- _connectionList { return connections; }
- _makeConnections
{
int i;
for (i=0; i<[connections count]; i++) {
id aConnection = [connections objectAt:i];
[self connectToDistributorNamed:[aConnection connectionName]
direction:[aConnection direction]];
}
return self;
}
@end
@implementation MiscDistributor
+ initialize
{
// set up class version number and set up the waiting list and
// distributors dictionary
if (self == [MiscDistributor class]) {
[MiscDistributor setVersion:CURRENT_VERSION];
if (!distributors) distributors = [[HashTable alloc]
initKeyDesc:"%" valueDesc:"@" capacity:STARTINGCAPACITY];
}
return self;
}
+ findDistributorNamed:(const char *)aString
{
// extract object from the hash table, creating if needed.
id theDistributor; NXAtom key;
if (!aString) return nil;
if (!strlen(aString)) return nil;
if (!distributors) distributors = [[HashTable alloc]
initKeyDesc:"%" valueDesc:"@" capacity:STARTINGCAPACITY];
key = NXUniqueString(aString);
// OK, have a name. Is it in the table?
theDistributor = [distributors valueForKey:key];
if (!theDistributor) {
theDistributor = [[MiscTee alloc] init];
[distributors insertKey:key value:theDistributor];
}
return theDistributor;
}
- init
{
[super init];
connections = [[List alloc] init];
return self;
}
- connectToDistributorNamed:(const char *)aString
direction:(MiscDCDirection)direction
{ // sets up an actual connection
id theTee = [[self class] findDistributorNamed:aString];
BOOL doIn = NO; BOOL doOut = NO;
switch (direction) {
case MiscIn : { doIn = YES; break; }
case MiscOut : { doOut = YES; break; }
case MiscInout : { doIn = YES; doOut = YES; break; }
default : { break; }
}
if (doIn) [theTee addConnection:self with:@selector(ping:)];
if (doOut) [self addConnection:theTee with:@selector(ping:)];
return self;
}
- awakeFromNib
{
[self _makeConnections];
return self;
}
- read:(NXTypedStream *)stream
{
int version;
[super read:stream];
version = NXTypedStreamClassVersion(stream,"MiscDistributor");
if (version == CURRENT_VERSION) {
connections = NXReadObject(stream);
}
if (!connections) connections = [[List alloc] init];
return self;
}
- write:(NXTypedStream *)stream
{
[super write:stream];
NXWriteObject(stream, connections);
return self;
}
@end
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.