[1235] allow the adding of trackers with leading and trailing whitespace

macosx/CreatorWindowController.m

@@ -311,6 +311,8 @@
 {
     NSString * tracker = (NSString *)object;
     
+    tracker = [tracker stringByTrimmingWhitespace];
+    
     if ([tracker rangeOfString: @"://"].location == NSNotFound)
         tracker = [@"http://" stringByAppendingString: tracker];
     

macosx/NSStringAdditions.h

@@ -29,6 +29,8 @@
 + (NSString *) ellipsis;
 - (NSString *) stringByAppendingEllipsis;
 
+- (NSString *) stringByTrimmingWhitespace;
+
 + (NSString *) stringForFileSize: (uint64_t) size;
 
 + (NSString *) stringForSpeed: (float) speed;

macosx/NSStringAdditions.m

@@ -38,6 +38,19 @@
 	return [self stringByAppendingString: [NSString ellipsis]];
 }
 
+- (NSString *) stringByTrimmingWhitespace
+{
+    NSString * newString = self;
+    while ([newString length] > 0 && [[NSCharacterSet whitespaceAndNewlineCharacterSet] characterIsMember:
+                                        [newString characterAtIndex: [newString length] - 1]])
+        newString = [newString substringToIndex: [newString length] - 1];
+    while ([newString length] > 0 && [[NSCharacterSet whitespaceAndNewlineCharacterSet] characterIsMember:
+                                        [newString characterAtIndex: 0]])
+        newString = [newString substringFromIndex: 1];
+    
+    return newString;
+}
+
 + (NSString *) stringForFileSize: (uint64_t) size
 {
     if (size < 1024)

macosx/Torrent.m

@@ -808,6 +808,9 @@ void completenessChangeCallback(tr_torrent * torrent, cp_status_t status, void *
     i--;
     
     NSString * tracker = [trackers objectAtIndex: i];
+    
+    tracker = [tracker stringByTrimmingWhitespace];
+    
     if ([tracker rangeOfString: @"://"].location == NSNotFound)
     {
         tracker = [@"http://" stringByAppendingString: tracker];