More data link implementation details.

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@20850 72102866-910b-0410-8b05-ffd578937521

ChangeLog

@@ -1,3 +1,15 @@
+2005-03-05 10:53 Gregory John Casamento <greg_casamento@yahoo.com>
+
+	* Headers/AppKit/NSDataLink.h
+	* Headers/AppKit/NSDataLinkManager.h: Added some ivars
+	* Source/Functions.m: Changed the NSLinkFrameThickness() function to
+	return 1 instead of 1.5.
+	* Source/NSDataLink.m: Implemented several methods.
+	* Source/NSDataLinkManager.m: Implemented several methods.
+	* Source/NSDataLinkPanel.m: Change version from 1 to 0.
+	* Source/NSSelection.m: Change version from 1 to 0, corrected 
+	but in initWithCoder:.
+
 2005-03-03  Adam Fedor  <fedor@gnu.org>
 
 	* configure.ac: Disable gsnd on darwin

Headers/AppKit/NSDataLink.h

@@ -65,19 +65,32 @@ APPKIT_EXPORT NSString *NSDataLinkFileNameExtension;
   NSDataLinkNumber      linkNumber;
   NSDataLinkDisposition disposition;
   NSDataLinkUpdateMode  updateMode;
-  NSDataLinkManager    *manager;
 
   // info about the source.
-  NSDate               *lastUpdateTime;
+  NSDate                *lastUpdateTime;
-  NSString             *sourceApplicationName;
+  NSString              *sourceApplicationName;
-  NSString             *sourceFilename;
+  NSString              *sourceFilename;
-  NSSelection          *sourceSelection;
+  NSSelection           *sourceSelection;
-  NSArray              *types;
+  id                    sourceManager;
 
   // info about the destination
-  NSString             *destinationApplicationName;
+  NSString              *destinationApplicationName;
-  NSString             *destinationFilename;
+  NSString              *destinationFilename;
-  NSSelection          *destinationSelection;
+  NSSelection           *destinationSelection;
+  id                    destinationManager;
+  
+  // types.
+  NSArray               *types;
+
+  // other flags
+  struct __linkFlags {
+    unsigned   appVerifies:1;
+    unsigned   broken:1;
+    unsigned   canUpdateContinuously:1;
+    unsigned   isDirty:1;
+    unsigned   willOpenSource:1;
+    unsigned   willUpdate:1;
+  } _flags;
 }
 
 //
@@ -131,5 +144,8 @@ APPKIT_EXPORT NSString *NSDataLinkFileNameExtension;
 - (NSDataLinkUpdateMode)updateMode;
 @end
 
+APPKIT_EXPORT NSString *NSDataLinkFilenameExtension;
+APPKIT_EXPORT NSString *NSDataLinkPboardType;
+
 #endif // _GNUstep_H_NSDataLink
 

Headers/AppKit/NSDataLinkManager.h

@@ -33,7 +33,7 @@
 
 @class NSString;
 @class NSEnumerator;
-@class NSMutableDictionary;
+@class NSMutableArray;
 @class NSDataLink;
 @class NSSelection;
 @class NSPasteboard;
@@ -44,12 +44,16 @@
   // Attributes
   id                  delegate;
   NSString            *filename;
-  BOOL                delegateVerifiesLinks;
+  NSMutableArray      *sourceLinks;
-  BOOL                interactsWithUser;
+  NSMutableArray      *destinationLinks;
-  BOOL                isEdited;
+
-  BOOL                areLinkOutlinesVisible;
+  struct __dlmFlags {
-  NSMutableDictionary *sourceLinks;
+    unsigned areLinkOutlinesVisible:1;
-  NSMutableDictionary *destinationLinks;
+    unsigned delegateVerifiesLinks:1;
+    unsigned interactsWithUser:1;
+    unsigned isEdited:1;
+  } _flags;
+
 }
 
 //
@@ -108,9 +112,7 @@
 // Methods Implemented by the Delegate
 //
 @interface NSObject (NSDataLinkManagerDelegate)
-- (BOOL)copyToPasteboard:(NSPasteboard *)pasteboard 
+// data link management methods.
-		      at:(NSSelection *)selection
-	cheapCopyAllowed:(BOOL)flag;
 - (void)dataLinkManager:(NSDataLinkManager *)sender 
 	   didBreakLink:(NSDataLink *)link;
 - (BOOL)dataLinkManager:(NSDataLinkManager *)sender 
@@ -123,6 +125,11 @@
 - (void)dataLinkManagerDidEditLinks:(NSDataLinkManager *)sender;
 - (void)dataLinkManagerRedrawLinkOutlines:(NSDataLinkManager *)sender;
 - (BOOL)dataLinkManagerTracksLinksIndividually:(NSDataLinkManager *)sender;
+
+// selection management methods.
+- (BOOL)copyToPasteboard:(NSPasteboard *)pasteboard 
+		      at:(NSSelection *)selection
+	cheapCopyAllowed:(BOOL)flag;
 - (BOOL)importFile:(NSString *)filename
 		at:(NSSelection *)selection;
 - (BOOL)pasteFromPasteboard:(NSPasteboard *)pasteboard 

Source/Functions.m

@@ -779,7 +779,7 @@ NSDrawWindowBackground(NSRect aRect)
 float 
 NSLinkFrameThickness(void)
 {
-  return 1.5;
+  return 1;
 }
 
 void 

Source/NSDataLink.m

@@ -1,7 +1,9 @@
 /** <title>NSDataLink</title>
 
-   Copyright (C) 1996 Free Software Foundation, Inc.
+   Copyright (C) 1996, 2005 Free Software Foundation, Inc.
 
+   Author: Gregory John Casamento <greg_casamento@yahoo.com>
+   Date: 2005
    Author: Scott Christley <scottc@net-community.com>
    Date: 1996
    
@@ -24,29 +26,17 @@
 */ 
 
 #include "config.h"
+#include <Foundation/NSFileManager.h>
+#include <Foundation/NSArchiver.h>
+#include <Foundation/NSData.h>
 #include "AppKit/NSDataLink.h"
 #include "AppKit/NSDataLinkManager.h"
+#include "AppKit/NSPasteboard.h"
+#include "AppKit/NSSavePanel.h"
+#include "AppKit/NSSelection.h"
 
-@interface NSDataLink (Private)
+// constants
-- (void) setLastUpdateTime: (NSDate *)date;
+NSString *NSDataLinkFilenameExtension = @"dlink";
-- (void) setSourceFilename: (NSString *)src;
-- (void) setDestinationFilename: (NSString *)src;
-@end
-
-@implementation NSDataLink (Private)
-- (void) setLastUpdateTime: (NSDate *)date
-{
-  ASSIGN(lastUpdateTime, date);
-}
-- (void) setSourceFilename: (NSString *)src
-{
-  ASSIGN(sourceFilename,src);
-}
-- (void) setDestinationFilename: (NSString *)dst
-{
-  ASSIGN(destinationFilename, dst);
-}
-@end
 
 @implementation NSDataLink
 
@@ -58,7 +48,7 @@
   if (self == [NSDataLink class])
     {
       // Initial version
-      [self setVersion: 1];
+      [self setVersion: 0];
     }
 }
 
@@ -70,6 +60,12 @@
 //
 - (id)initLinkedToFile:(NSString *)filename
 {
+  if((self = [self init]) != nil)
+    {
+      NSData *data = [NSData dataWithBytes: [filename cString] length: [filename cStringLength]];
+      NSSelection *selection = [NSSelection selectionWithDescriptionData: data];
+      ASSIGN(sourceSelection, selection);
+    }
   return nil;
 }
 
@@ -80,7 +76,7 @@
   if((self = [self init]) != nil)
     {
       ASSIGN(sourceSelection,selection);
-      ASSIGN(manager,linkManager);
+      ASSIGN(sourceManager,linkManager);
       ASSIGN(types,newTypes);
     }
   return self;
@@ -88,12 +84,18 @@
 
 - (id)initWithContentsOfFile:(NSString *)filename
 {
-  return nil;
+  NSData *data = AUTORELEASE([[NSData alloc] initWithContentsOfFile: filename]);
+  id object = [NSUnarchiver unarchiveObjectWithData: data];
+  RELEASE(self);
+  return object;
 }
 
 - (id)initWithPasteboard:(NSPasteboard *)pasteboard
 {
-  return nil;
+  NSData *data = [pasteboard dataForType: NSDataLinkPboardType];
+  id object = [NSUnarchiver unarchiveObjectWithData: data];
+  RELEASE(self);
+  return object;
 }
 
 //
@@ -101,16 +103,48 @@
 //
 - (BOOL)saveLinkIn:(NSString *)directoryName
 {
+  NSSavePanel		*sp;
+  int			result;
+
+  sp = [NSSavePanel savePanel];
+  [sp setRequiredFileType: NSDataLinkFilenameExtension];
+  result = [sp runModalForDirectory: directoryName file: @""];
+  if (result == NSOKButton)
+    {
+      NSFileManager	*mgr = [NSFileManager defaultManager];
+      NSString		*path = [sp filename];
+
+      if ([mgr fileExistsAtPath: path] == YES)
+	{
+	  /* NSSavePanel has already asked if it's ok to replace */
+	  NSString	*bPath = [path stringByAppendingString: @"~"];
+	  
+	  [mgr removeFileAtPath: bPath handler: nil];
+	  [mgr movePath: path toPath: bPath handler: nil];
+	}
+
+      // save it.
+      return [self writeToFile: path];
+    }
   return NO;
 }
 
 - (BOOL)writeToFile:(NSString *)filename
 {
-  return NO;
+  NSString *path = filename;
+
+  if([[path pathExtension] isEqual: NSDataLinkFilenameExtension] == NO)
+    {
+      path = [filename stringByAppendingPathExtension: NSDataLinkFilenameExtension];
+    }
+
+  return [NSArchiver archiveRootObject: self toFile: path];
 }
 
 - (void)writeToPasteboard:(NSPasteboard *)pasteboard
 {
+  NSData *data = [NSArchiver archivedDataWithRootObject: self];
+  [pasteboard setData: data forType: NSDataLinkPboardType];
 }
 
 //
@@ -128,7 +162,7 @@
 
 - (NSDataLinkManager *)manager
 {
-  return manager;
+  return sourceManager;
 }
 
 //
@@ -187,11 +221,34 @@
 //
 - (BOOL)break
 {
-  return NO;
+  id srcDelegate = [sourceManager delegate];
+  id dstDelegate = [destinationManager delegate];
+
+  // The spec is quite vague here.  I don't know under what 
+  // circumstances a link cannot be broken, so this method 
+  // always returns YES.
+
+  if([srcDelegate respondsToSelector: @selector(dataLinkManager:didBreakLink:)])
+    {
+      [srcDelegate dataLinkManager: sourceManager didBreakLink: self];
+    }
+
+  if([dstDelegate respondsToSelector: @selector(dataLinkManager:didBreakLink:)])
+    {
+      [dstDelegate dataLinkManager: destinationManager didBreakLink: self];
+    }
+
+  return (_flags.broken = YES);
 }
 
 - (void)noteSourceEdited
 {
+  _flags.isDirty = YES;
+
+  if(updateMode != NSUpdateNever)
+    {
+      [sourceManager noteDocumentEdited];
+    }
 }
 
 - (void)setUpdateMode:(NSDataLinkUpdateMode)mode
@@ -214,42 +271,80 @@
 //
 - (void) encodeWithCoder: (NSCoder*)aCoder
 {
+  BOOL flag = NO;
+
   [aCoder encodeValueOfObjCType: @encode(int) at: &linkNumber];
   [aCoder encodeValueOfObjCType: @encode(int) at: &disposition];
   [aCoder encodeValueOfObjCType: @encode(int) at: &updateMode];
-  [aCoder encodeValueOfObjCType: @encode(id)  at: &manager];
   [aCoder encodeValueOfObjCType: @encode(id)  at: &lastUpdateTime];
+
   [aCoder encodeValueOfObjCType: @encode(id)  at: &sourceApplicationName];
   [aCoder encodeValueOfObjCType: @encode(id)  at: &sourceFilename];
   [aCoder encodeValueOfObjCType: @encode(id)  at: &sourceSelection];
-  [aCoder encodeValueOfObjCType: @encode(id)  at: &types];
+  [aCoder encodeValueOfObjCType: @encode(id)  at: &sourceManager];
+
   [aCoder encodeValueOfObjCType: @encode(id)  at: &destinationApplicationName];
   [aCoder encodeValueOfObjCType: @encode(id)  at: &destinationFilename];
   [aCoder encodeValueOfObjCType: @encode(id)  at: &destinationSelection];
+  [aCoder encodeValueOfObjCType: @encode(id)  at: &destinationManager];
+
+  [aCoder encodeValueOfObjCType: @encode(id)  at: &types];
+
+  // flags...
+  flag = _flags.appVerifies;
+  [aCoder encodeValueOfObjCType: @encode(BOOL)  at: &flag];
+  flag = _flags.canUpdateContinuously;
+  [aCoder encodeValueOfObjCType: @encode(BOOL)  at: &flag];
+  flag = _flags.isDirty;
+  [aCoder encodeValueOfObjCType: @encode(BOOL)  at: &flag];
+  flag = _flags.willOpenSource;
+  [aCoder encodeValueOfObjCType: @encode(BOOL)  at: &flag];
+  flag = _flags.willUpdate;
+  [aCoder encodeValueOfObjCType: @encode(BOOL)  at: &flag];
 }
 
 - (id) initWithCoder: (NSCoder*)aCoder
 {
   int version = [aCoder versionForClassName: @"NSDataLink"];
 
-  if(version == 1)
+  if(version == 0)
     {
+      BOOL flag = NO;
+
       [aCoder decodeValueOfObjCType: @encode(int) at: &linkNumber];
       [aCoder decodeValueOfObjCType: @encode(int) at: &disposition];
       [aCoder decodeValueOfObjCType: @encode(int) at: &updateMode];
-      [aCoder decodeValueOfObjCType: @encode(id)  at: &manager];
+      [aCoder decodeValueOfObjCType: @encode(id)  at: &sourceManager];
+      [aCoder encodeValueOfObjCType: @encode(id)  at: &destinationManager];
       [aCoder decodeValueOfObjCType: @encode(id)  at: &lastUpdateTime];
+
       [aCoder decodeValueOfObjCType: @encode(id)  at: &sourceApplicationName];
       [aCoder decodeValueOfObjCType: @encode(id)  at: &sourceFilename];
       [aCoder decodeValueOfObjCType: @encode(id)  at: &sourceSelection];
-      [aCoder decodeValueOfObjCType: @encode(id)  at: &types];
+      [aCoder decodeValueOfObjCType: @encode(id)  at: &sourceManager];
+
       [aCoder decodeValueOfObjCType: @encode(id)  at: &destinationApplicationName];
       [aCoder decodeValueOfObjCType: @encode(id)  at: &destinationFilename];
       [aCoder decodeValueOfObjCType: @encode(id)  at: &destinationSelection];
+      [aCoder decodeValueOfObjCType: @encode(id)  at: &destinationManager];
+
+      [aCoder decodeValueOfObjCType: @encode(id)  at: &types];
+
+      // flags...
+      [aCoder decodeValueOfObjCType: @encode(BOOL)  at: &flag];
+      _flags.appVerifies = flag;
+      [aCoder decodeValueOfObjCType: @encode(BOOL)  at: &flag];
+      _flags.canUpdateContinuously = flag;
+      [aCoder decodeValueOfObjCType: @encode(BOOL)  at: &flag];
+      _flags.isDirty = flag;
+      [aCoder decodeValueOfObjCType: @encode(BOOL)  at: &flag];
+      _flags.willOpenSource = flag;
+      [aCoder decodeValueOfObjCType: @encode(BOOL)  at: &flag];
+      _flags.willUpdate = flag;
     }
   else
     {
-      NSLog(@"No decoder for NSDataLink version #%d",version);
+      return nil;
     }
 
   return self;

Source/NSDataLinkManager.m

@@ -1,7 +1,9 @@
 /** <title>NSDataLinkManager</title>
 
-   Copyright (C) 1996 Free Software Foundation, Inc.
+   Copyright (C) 1996, 2005 Free Software Foundation, Inc.
 
+   Author: Gregory John Casamento <greg_casamento@yahoo.com>
+   Date: 2005
    Author: Scott Christley <scottc@net-community.com>
    Date: 1996
    
@@ -26,9 +28,58 @@
 #include "config.h"
 #include <Foundation/NSDictionary.h>
 #include <Foundation/NSEnumerator.h>
+#include <Foundation/NSArray.h>
 #include <AppKit/NSDataLinkManager.h>
 #include <AppKit/NSDataLink.h>
 
+@interface NSDataLink (Private)
+- (void) setLastUpdateTime: (NSDate *)date;
+- (void) setSourceFilename: (NSString *)src;
+- (void) setDestinationFilename: (NSString *)dst;
+- (void) setSourceManager: (id)src;
+- (void) setDestinationManager: (id)dst;
+- (void) setSourceSelection: (id)src;
+- (void) setDestinationSelection: (id)dst;
+@end
+
+@implementation NSDataLink (Private)
+- (void) setLastUpdateTime: (NSDate *)date
+{
+  ASSIGN(lastUpdateTime, date);
+}
+
+- (void) setSourceFilename: (NSString *)src
+{
+  ASSIGN(sourceFilename,src);
+}
+
+- (void) setDestinationFilename: (NSString *)dst
+{
+  ASSIGN(destinationFilename, dst);
+}
+
+- (void) setSourceManager: (id)src
+{
+  ASSIGN(sourceManager,src);
+}
+
+- (void) setDestinationManager: (id)dst
+{
+  ASSIGN(destinationManager,dst);
+}
+
+- (void) setSourceSelection: (id)src
+{
+  ASSIGN(sourceSelection,src);
+}
+
+- (void) setDestinationSelection: (id)dst
+{
+  ASSIGN(destinationSelection,dst);
+}
+@end
+
+
 @implementation NSDataLinkManager
 
 //
@@ -39,7 +90,7 @@
   if (self == [NSDataLinkManager class])
     {
       // Initial version
-      [self setVersion:1];
+      [self setVersion: 0];
     }
 }
 
@@ -53,12 +104,15 @@
 {
   self = [super init];
 
-  ASSIGN(delegate,anObject);
+  if(self != nil)
-  filename = nil;
+    {
-  delegateVerifiesLinks = NO;
+      ASSIGN(delegate,anObject);
-  interactsWithUser = NO;
+      filename = nil;
-  isEdited = NO;
+      _flags.delegateVerifiesLinks = NO;
-  areLinkOutlinesVisible = NO;
+      _flags.interactsWithUser = NO;
+      _flags.isEdited = NO;
+      _flags.areLinkOutlinesVisible = NO;
+    }
 
   return self;
 }
@@ -68,12 +122,15 @@
 {
   self = [super init];
 
-  ASSIGN(delegate,anObject);
+  if(self != nil)
-  ASSIGN(filename,path);
+    {
-  delegateVerifiesLinks = NO;
+      ASSIGN(delegate,anObject);
-  interactsWithUser = NO;
+      ASSIGN(filename,path);
-  isEdited = NO;
+      _flags.delegateVerifiesLinks = NO;
-  areLinkOutlinesVisible = NO;
+      _flags.interactsWithUser = NO;
+      _flags.isEdited = NO;
+      _flags.areLinkOutlinesVisible = NO;
+    }
 
   return self;
 }
@@ -84,7 +141,18 @@
 - (BOOL)addLink:(NSDataLink *)link
 	     at:(NSSelection *)selection
 {
-  return NO;
+  BOOL result = NO;
+
+  [link setDestinationSelection: selection];
+  [link setDestinationManager: self];
+
+  if([destinationLinks containsObject: link] == NO)
+    {
+      [destinationLinks addObject: link];
+      result = YES;
+    }
+
+  return result;
 }
 
 - (BOOL)addLinkAsMarker:(NSDataLink *)link
@@ -102,23 +170,26 @@
 
 - (void)breakAllLinks
 {
-  NSEnumerator *en = [self destinationLinkEnumerator];
+  NSArray *allLinks = [sourceLinks arrayByAddingObjectsFromArray: destinationLinks];
+  NSEnumerator *en = [allLinks objectEnumerator];
   id obj = nil;
 
   while((obj = [en nextObject]) != nil)
     {
       [obj break];
     }
-
-  en = [self sourceLinkEnumerator];
-  while((obj = [en nextObject]) != nil)
-    {
-      [obj break];
-    }
 }
 
 - (void)writeLinksToPasteboard:(NSPasteboard *)pasteboard
 {
+  NSArray *allLinks = [sourceLinks arrayByAddingObjectsFromArray: destinationLinks];
+  NSEnumerator *en = [allLinks objectEnumerator];
+  id obj = nil;
+
+  while((obj = [en nextObject]) != nil)
+    {
+      [obj writeToPasteboard: pasteboard];
+    }
 }
 
 //
@@ -158,7 +229,7 @@
 
 - (BOOL)delegateVerifiesLinks
 {
-  return delegateVerifiesLinks;
+  return _flags.delegateVerifiesLinks;
 }
 
 - (NSString *)filename
@@ -168,22 +239,22 @@
 
 - (BOOL)interactsWithUser
 {
-  return interactsWithUser;
+  return _flags.interactsWithUser;
 }
 
 - (BOOL)isEdited
 {
-  return isEdited;
+  return _flags.isEdited;
 }
 
 - (void)setDelegateVerifiesLinks:(BOOL)flag
 {
-  delegateVerifiesLinks = flag;
+  _flags.delegateVerifiesLinks = flag;
 }
 
 - (void)setInteractsWithUser:(BOOL)flag
 {
-  interactsWithUser = flag;
+  _flags.interactsWithUser = flag;
 }
 
 //
@@ -191,12 +262,12 @@
 //
 - (BOOL)areLinkOutlinesVisible
 {
-  return areLinkOutlinesVisible;
+  return _flags.areLinkOutlinesVisible;
 }
 
 - (NSEnumerator *)destinationLinkEnumerator
 {
-  return [destinationLinks keyEnumerator];
+  return [destinationLinks objectEnumerator];
 }
 
 - (NSDataLink *)destinationLinkWithSelection:(NSSelection *)destSel
@@ -217,12 +288,12 @@
 
 - (void)setLinkOutlinesVisible:(BOOL)flag
 {
-  areLinkOutlinesVisible = flag;
+  _flags.areLinkOutlinesVisible = flag;
 }
 
 - (NSEnumerator *)sourceLinkEnumerator
 {
-  return [sourceLinks keyEnumerator];
+  return [sourceLinks objectEnumerator];
 }
 
 //
@@ -230,10 +301,48 @@
 //
 - (void) encodeWithCoder: (NSCoder*)aCoder
 {
+  BOOL flag = NO;
+
+  [aCoder encodeValueOfObjCType: @encode(id)  at: &filename];
+  [aCoder encodeValueOfObjCType: @encode(id)  at: &sourceLinks];
+  [aCoder encodeValueOfObjCType: @encode(id)  at: &destinationLinks];
+
+  flag = _flags.areLinkOutlinesVisible;
+  [aCoder encodeValueOfObjCType: @encode(BOOL)  at: &flag];
+  flag = _flags.delegateVerifiesLinks;
+  [aCoder encodeValueOfObjCType: @encode(BOOL)  at: &flag];
+  flag = _flags.interactsWithUser;
+  [aCoder encodeValueOfObjCType: @encode(BOOL)  at: &flag];
+  flag = _flags.isEdited;
+  [aCoder encodeValueOfObjCType: @encode(BOOL)  at: &flag];
 }
 
-- (id) initWithCoder: (NSCoder*)aDecoder
+- (id) initWithCoder: (NSCoder*)aCoder
 {
+  int version = [aCoder versionForClassName: @"NSDataLinkManager"];
+
+  if(version == 0)
+    {
+      BOOL flag = NO;
+      
+      [aCoder decodeValueOfObjCType: @encode(id)  at: &filename];
+      [aCoder decodeValueOfObjCType: @encode(id)  at: &sourceLinks];
+      [aCoder decodeValueOfObjCType: @encode(id)  at: &destinationLinks];
+      
+      [aCoder decodeValueOfObjCType: @encode(BOOL)  at: &flag];
+      _flags.areLinkOutlinesVisible = flag;
+      [aCoder decodeValueOfObjCType: @encode(BOOL)  at: &flag];
+      _flags.delegateVerifiesLinks = flag;
+      [aCoder decodeValueOfObjCType: @encode(BOOL)  at: &flag];
+      _flags.interactsWithUser = flag;
+      [aCoder decodeValueOfObjCType: @encode(BOOL)  at: &flag];
+      _flags.isEdited = flag;
+    }
+  else
+    {
+      return nil;
+    }
+
   return self;
 }
 

Source/NSDataLinkPanel.m

@@ -104,7 +104,7 @@ static NSDataLinkPanel *_sharedDataLinkPanel;
   if (self == [NSDataLinkPanel class])
     {
       // Initial version
-      [self setVersion:1];
+      [self setVersion: 0];
     }
 }
 

Source/NSSelection.m

@@ -96,7 +96,7 @@ typedef enum
   if (self == [NSSelection class])
     {
       // Initial version
-      [self setVersion:1];
+      [self setVersion: 0];
     }
 }
 
@@ -226,6 +226,8 @@ typedef enum
 	    at: &_isWellKnownSelection];
   [aDecoder decodeValueOfObjCType: @encode(int)
 	    at: &_selectionType];
+  [aDecoder decodeValueOfObjCType: @encode(id)
+	    at: _descriptionData];
 
   // if it's a well known selection then determine which one it is.
   if(_isWellKnownSelection)
@@ -249,11 +251,6 @@ typedef enum
 	  break;
 	}
     }
-  else
-    {
-      [aDecoder decodeValueOfObjCType: @encode(id)
-		at: _descriptionData];
-    }
 
   return self;
 }