Changes to facilitate XIB loading in IB/Gorm. Added customClassNames to IBObjectContainer and skipped instantiation of custom classes in GSXib5KeyedUnarchiver if we are currently loading as a model in IB/Gorm.

ChangeLog

@@ -1,3 +1,16 @@
+2021-04-25 Gregory John Casamento <greg.casamento@gmail.com>
+
+	* Headers/Additions/GNUstepGUI/GSXibLoading.h: Add declaration
+        for customClassNames so that we can use that to collect the names
+        of all of the custom classes and their associations.
+	* Source/GNUmakefile: Remove classes which are not used.
+	* Source/GSXib5KeyedUnarchiver.m: In parserDidStartElement...
+        call isInInterfaceBuilder to determine if we should allocate
+        custom classes.
+	* Source/GSXibLoading.m: Add in code in nibInstantiate which uses
+        [NSClassSwapper isInInterfaceBuilder] to prevent connections
+        from being established if the XIB is being loaded in IB/Gorm.
+
 2021-04-23 Gregory John Casamento <greg.casamento@gmail.com>
 
 	* Source/Functions.m: QuickFix. Remove unecessary warning

Headers/Additions/GNUstepGUI/GSXibLoading.h

@@ -159,6 +159,7 @@
 - (id) nibInstantiate;
 - (NSEnumerator *) connectionRecordEnumerator;
 - (NSEnumerator *) objectRecordEnumerator;
+- (NSDictionary *) customClassNames;
 @end
 
 @interface IBUserDefinedRuntimeAttributesPlaceholder : NSObject <NSCoding>

Source/GSXib5KeyedUnarchiver.m

@@ -760,11 +760,16 @@ didStartElement: (NSString*)elementName
       NSString            *className   = nil;
       NSString            *elementType = elementName;
 
-      if (([@"window" isEqualToString: elementName] == NO) &&
-          ([@"customView" isEqualToString: elementName] == NO) &&
-          ([@"customObject" isEqualToString: elementName] == NO))
+      // If we are in IB we don't want to handle custom classes since they are
+      // not linked into the application.
+      if ([NSClassSwapper isInInterfaceBuilder] == NO)
         {
-          className = [attributes objectForKey: @"customClass"];
+          if (([@"window" isEqualToString: elementName] == NO) &&
+              ([@"customView" isEqualToString: elementName] == NO) &&
+              ([@"customObject" isEqualToString: elementName] == NO))
+            {
+              className = [attributes objectForKey: @"customClass"];
+            }
         }
 
       if (nil == className)

Source/GSXibLoading.m

@@ -1039,6 +1039,12 @@
   NSEnumerator *en;
   id obj;
 
+  // If we are currently in IB, then don't do anything.
+  if ([NSClassSwapper isInInterfaceBuilder])
+    {
+      return self;
+    }
+
   // iterate over connections, instantiate, and then establish them.
   en = [connectionRecords objectEnumerator];
   while ((obj = [en nextObject]) != nil)