Use proxies for named images so that changes to images are nstantly reflected

when you change themes.


git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@27810 72102866-910b-0410-8b05-ffd578937521

ChangeLog

@@ -1,3 +1,12 @@
+2009-02-08 Richard Frith-Macdonald <rfm@gnu.org>
+
+	* Source/NSImage.m: WARNING ... this change may have unforseen
+	consequences.  Named images are replaced by proxies to the images
+	so that all image drawing the the gui updates instantly when the
+	theme changes.  It's possible that sme code uses the image in an
+	unexpected way that the proxy does not support ... plase look out
+	for that and report any problems so I can fix them.
+
 2009-02-08 01:17-EST Gregory John Casamento <greg_casamento@yahoo.com>
 
 	* Source/NSApplication.m: Added code to handle exceptions in 

Source/NSImage.m

@@ -35,6 +35,7 @@
 #include <Foundation/NSException.h>
 #include <Foundation/NSFileManager.h>
 #include <Foundation/NSKeyedArchiver.h>
+#include <Foundation/NSProxy.h>
 #include <Foundation/NSString.h>
 #include <Foundation/NSValue.h>
 
@@ -71,6 +72,59 @@ static double gs_max(double x, double y)
     return x;
 }
 
+@interface	GSImageProxy : NSProxy
+{
+  NSImage	*_image;
+}
+- (NSImage*) _image;
+- (void) _setImage: (NSImage*)image;
+@end
+@implementation	GSImageProxy
+- (NSImage*) _image
+{
+  return _image;
+}
+- (void) _setImage: (NSImage*)image
+{
+  ASSIGN(_image, image);
+}
+- (void) dealloc
+{
+  DESTROY(_image);
+  [super dealloc];
+}
+- (void) forwardInvocation: (NSInvocation*)anInvocation
+{
+  [anInvocation invokeWithTarget: _image];
+}
+- (NSMethodSignature*) methodSignatureForSelector: (SEL)aSelector
+{
+  if (_image != nil)
+    {
+      return [_image methodSignatureForSelector: aSelector];
+    }
+  else
+    {
+      /*
+       * Evil hack to prevent recursion - if we are asking a remote
+       * object for a method signature, we can't ask it for the
+       * signature of methodSignatureForSelector:, so we hack in
+       * the signature required manually :-(
+       */
+      if (sel_eq(aSelector, _cmd))
+	{
+	  static	NSMethodSignature	*sig = nil;
+
+	  if (sig == nil)
+	    {
+	      sig = RETAIN([NSMethodSignature signatureWithObjCTypes: "@@::"]);
+	    }
+	  return sig;
+	}
+      return nil;
+    }
+}
+@end
 
 BOOL NSImageForceCaching = NO; /* use on missmatch */
 
@@ -471,8 +525,8 @@ repd_for_rep(NSArray *_reps, NSImageRep *rep)
   RELEASE(_reps);
   /* Make sure we don't remove name from the nameDict if we are just a copy
      of the named image, not the original image */
-  if (_name && self == [nameDict objectForKey: _name]) 
-    [nameDict removeObjectForKey: _name];
+  if (_name && self == [[nameDict objectForKey: _name] _image]) 
+    [[nameDict objectForKey: _name] _setImage: nil];
   RELEASE(_name);
   TEST_RELEASE(_fileName);
   RELEASE(_color);
@@ -510,23 +564,30 @@ repd_for_rep(NSArray *_reps, NSImageRep *rep)
 
 - (BOOL) setName: (NSString *)aName
 {
+  GSImageProxy	*proxy = nil;
   BOOL retained = NO;
   
-  if (!aName || [nameDict objectForKey: aName])
+  if (!aName || [[nameDict objectForKey: aName] _image] != nil)
     return NO;
 
-  if (_name && self == [nameDict objectForKey: _name])
+  if (_name && self == [(proxy = [nameDict objectForKey: _name]) _image])
     {
       /* We retain self in case removing from the dictionary releases
          us */
       RETAIN (self);
       retained = YES;
-      [nameDict removeObjectForKey: _name];
+      [proxy _setImage: nil];
     }
   
   ASSIGN(_name, aName);
   
-  [nameDict setObject: self forKey: _name];
+  if ((proxy = [nameDict objectForKey: _name]) == nil)
+    {
+      proxy = [GSImageProxy alloc];
+      [nameDict setObject: proxy forKey: _name];
+      [proxy release]; 
+    }
+  [proxy _setImage: self];
   if (retained)
     {
       RELEASE (self);

Source/NSScrollView.m

@@ -1007,7 +1007,8 @@ static float scrollerWidth;
   contentRect = NSInsetRect(_bounds, border.width, border.height);
   if (contentRect.size.width < 0 || contentRect.size.height < 0)
     {
-      NSWarnMLog(@"given too small a size to tile", 0);
+      /* FIXME ... should we do something else when given
+       * too small a size to tile? */
       return;
     }