Farious fixes

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@29513 72102866-910b-0410-8b05-ffd578937521

ChangeLog

@@ -1,7 +1,18 @@
+2010-02-08 Richard Frith-Macdonald <rfm@gnu.org>
+
+	* Source/NSAttributedString.m: minor cosmetic change
+	* Source/GSAttributedString.m: Re-introduce proxy for -string
+	and comment to try to avoid it being accidentally removed again.
+	* Source/GSString.m: Fixups to work properly with string proxies.
+	* Source/NSException.m: Re-instate correct behavior and make the
+	comment about it more emphatic.
+
 2010-02-08 Jonathan Gillaspie <jonathan.gillaspie@testplant.com>
+
 	* Source/NSException.m
-	* Removed redundant call to _NSFoundationUncaughtExceptionHandler and added else blocks
-	to allow a set uncaught exception handler to NOT exit if capable of recovering.
+	* Removed redundant call to _NSFoundationUncaughtExceptionHandler
+	and added else blocks to allow a set uncaught exception handler
+	to NOT exit if capable of recovering.
 
 2010-02-08 Richard Frith-Macdonald <rfm@gnu.org>
 

Headers/Foundation/NSAttributedString.h

@@ -72,6 +72,11 @@ extern "C" {
 
 //Retrieving character information
 - (NSUInteger) length;
+/** Returns the string content of the receiver.<br />
+ * NB. this is actually a proxy to the internal content (which may change)
+ * so if you need an immutable instance yu should copy the returned value,
+ * not jhust retain it.
+ */
 - (NSString*) string;					//Primitive method!
 
 //Retrieving attribute information

Source/GSAttributedString.m

@@ -52,7 +52,9 @@
 #import "Foundation/NSRange.h"
 #import "Foundation/NSDebug.h"
 #import "Foundation/NSArray.h"
+#import "Foundation/NSInvocation.h"
 #import "Foundation/NSLock.h"
+#import "Foundation/NSProxy.h"
 #import "Foundation/NSThread.h"
 #import "Foundation/NSNotification.h"
 #import "Foundation/NSZone.h"
@@ -61,6 +63,103 @@
 
 static	NSDictionary	*blank;
 
+@interface GSAttributedStringProxy : NSProxy
+{
+  NSString	*string;
+}
+- (id) _initWithString: (NSString*)s;
+@end
+
+@implementation	GSAttributedStringProxy
+
+static Class NSObjectClass = nil;
+static Class NSStringClass = nil;
+
++ (void) initialize
+{
+  NSObjectClass = [NSObject class];
+  NSStringClass = [NSString class];
+}
+
+- (Class) class
+{
+  return NSStringClass;
+}
+
+- (void) dealloc
+{
+  [string release];
+  [super dealloc];
+}
+
+- (void) forwardInvocation: (NSInvocation*)anInvocation
+{
+  SEL	aSel = [anInvocation selector];
+
+  if (YES == [NSStringClass instancesRespondToSelector: aSel])
+    {
+      [anInvocation invokeWithTarget: string];
+    }
+  else
+    {
+      [NSException raise: NSGenericException
+	          format: @"NSString(instance) does not recognize %s",
+	aSel ? GSNameFromSelector(aSel) : "(null)"];
+    }
+}
+
+- (NSUInteger) hash
+{
+  return [string hash];
+}
+
+- (id) _initWithString: (NSString*)s
+{
+  string = [s retain];
+  return self;
+}
+
+- (BOOL) isEqual: (id)other
+{
+  return [string isEqual: other];
+}
+
+- (BOOL) isMemberOfClass: (Class)c
+{
+  return (c == NSStringClass) ? YES : NO;
+}
+
+- (BOOL) isKindOfClass: (Class)c
+{
+  return (c == NSStringClass || c == NSObjectClass) ? YES : NO;
+}
+
+- (NSMethodSignature*) methodSignatureForSelector: (SEL)aSelector
+{
+  NSMethodSignature	*sig;
+
+  if (YES == [NSStringClass instancesRespondToSelector: aSelector])
+    {
+      sig = [string methodSignatureForSelector: aSelector];
+    }
+  else
+    {
+      sig = [super methodSignatureForSelector: aSelector];
+    }
+  return sig;
+}
+
+- (BOOL) respondsToSelector: (SEL)aSelector
+{
+  if (YES == [NSStringClass instancesRespondToSelector: aSelector])
+    {
+      return YES;
+    }
+  return [super respondsToSelector: aSelector];
+}
+
+@end
+
 @interface GSAttributedString : NSAttributedString
 {
   NSString		*_textChars;
@@ -79,6 +178,7 @@ static	NSDictionary	*blank;
 {
   NSMutableString	*_textChars;
   NSMutableArray	*_infoArray;
+  NSString		*_proxy;
 }
 
 - (id) initWithString: (NSString*)aString
@@ -591,7 +691,14 @@ SANITY();
 
 - (NSString*) string
 {
-  return AUTORELEASE([_textChars copy]);
+  /* NB. This method is SUPPOSED to return a proxy to the mutable string!
+   * This is a performance feature documented ifor OSX.
+   */
+  if (_proxy == nil)
+    {
+      _proxy = [[GSAttributedStringProxy alloc] _initWithString: _textChars];
+    }
+  return _proxy;
 }
 
 - (NSDictionary*) attributesAtIndex: (unsigned)index
@@ -881,6 +988,7 @@ SANITY();
 
 - (void) dealloc
 {
+  [_proxy release];
   RELEASE(_textChars);
   RELEASE(_infoArray);
   [super dealloc];

Source/GSString.m

@@ -831,11 +831,11 @@ fixBOM(unsigned char **bytes, NSUInteger*length, BOOL *owned,
   if (string == nil)
     [NSException raise: NSInvalidArgumentException
 		format: @"-initWithString: given nil string"];
-  c = GSObjCClass(string);
-  if (GSObjCIsKindOf(c, NSStringClass) == NO)
+  if (NO == [string isKindOfClass: NSStringClass])	// may be proxy
     [NSException raise: NSInvalidArgumentException
 		format: @"-initWithString: given non-string object"];
 
+  c = GSObjCClass(string);
   length = [string length];
   if (GSObjCIsKindOf(c, GSCStringClass) == YES || c == NSConstantStringClass
     || (GSObjCIsKindOf(c, GSMutableStringClass) == YES
@@ -2144,7 +2144,7 @@ isEqual_c(GSStr self, id anObject)
 	}
       return NO;
     }
-  else if (GSObjCIsKindOf(c, NSStringClass))
+  else if (YES == [anObject isKindOfClass: NSStringClass]) // may be proxy
     {
       return (*equalImp)((id)self, equalSel, anObject);
     }
@@ -2211,7 +2211,7 @@ isEqual_u(GSStr self, id anObject)
 	}
       return NO;
     }
-  else if (GSObjCIsKindOf(c, NSStringClass))
+  else if (YES == [anObject isKindOfClass: NSStringClass]) // may be proxy
     {
       return (*equalImp)((id)self, equalSel, anObject);
     }
@@ -4767,7 +4767,7 @@ NSAssert(_flags.owned == 1 && _zone != 0, NSInternalInconsistencyException);
 	}
       return NO;
     }
-  else if (GSObjCIsKindOf(c, NSStringClass))
+  else if (YES == [anObject isKindOfClass: NSStringClass]) // may be proxy
     {
       return (*equalImp)(self, equalSel, anObject);
     }
@@ -4817,7 +4817,7 @@ NSAssert(_flags.owned == 1 && _zone != 0, NSInternalInconsistencyException);
 	}
       return NO;
     }
-  else if (GSObjCIsKindOf(c, NSStringClass))
+  else if (YES == [anObject isKindOfClass: NSStringClass]) // may be proxy
     {
       return (*equalImp)(self, equalSel, anObject);
     }

Source/NSAttributedString.m

@@ -157,7 +157,9 @@ static Class GSMutableAttributedStringClass;
       [aCoder  encodeObject: [self string] forKey: @"NSString"];
       if ([self length] > 0) 
 	{
-	  NSDictionary* attrs = [self attributesAtIndex: 0 effectiveRange: NULL];
+	  NSDictionary	*attrs;
+
+	  attrs = [self attributesAtIndex: 0 effectiveRange: NULL];
 
 	  [aCoder  encodeObject: attrs forKey: @"NSAttributes"];
 	}
@@ -523,7 +525,7 @@ static Class GSMutableAttributedStringClass;
     return NO;
 
   length = [otherString length];
-  if (length<=0)
+  if (length == 0)
     return YES;
 
   ownDictionary = [self attributesAtIndex: 0

Source/NSException.m

@@ -774,9 +774,7 @@ callUncaughtHandler(id value)
     {
       (*_NSUncaughtExceptionHandler)(value);
     }
-  else {
-    _NSFoundationUncaughtExceptionHandler(value);
-  }
+  _NSFoundationUncaughtExceptionHandler(value);
 }
 
 @implementation NSException
@@ -924,19 +922,20 @@ callUncaughtHandler(id value)
        */
       callUncaughtHandler(self);
 
-      /*
-       * The uncaught exception handler which is set has not
-       * exited, so we call the builtin handler, (undocumented
-       * behavior of MacOS-X).
-       * The standard handler is guaranteed to exit/abort.
+      /* The uncaught exception handler which is set has not exited,
+       * so we MUST call the builtin handler, (normal behavior of MacOS-X).
+       * The standard handler is guaranteed to exit/abort, which is the
+       * required behavioru for OSX compatibility.
+       * NB Cocoa's Exception Handling framework bypasses this behavior
+       * somehow ... if anyone contributes an implementation we could
+       * integrate it here.
        */
-      //_NSFoundationUncaughtExceptionHandler(self);
+      _NSFoundationUncaughtExceptionHandler(self);
     }
-  else {
-	thread->_exception_handler = handler->next;
-	handler->exception = self;
-	longjmp(handler->jumpState, 1);
-  }
+
+  thread->_exception_handler = handler->next;
+  handler->exception = self;
+  longjmp(handler->jumpState, 1);
 #endif
 }