Cleaner icon caching

macosx/NameCell.h

@@ -36,8 +36,7 @@
     NSString * fTimeString;
     NSString * fPeersString;
 
-    NSMutableArray * fFileTypes;
+    NSMutableDictionary * fIcons;
-    NSMutableArray * fIcons;
     NSImage             * fCurrentIcon;
 }
 - (void) setStat: (tr_stat_t *) stat whiteText: (BOOL) w;

macosx/NameCell.m

@@ -28,34 +28,31 @@
 
 - (id) init
 {
-    [super init];
+    if ((self = [super init]))
-
+        fIcons = [[NSMutableDictionary alloc] initWithCapacity: 10];
-    fFileTypes = [[NSMutableArray alloc] initWithCapacity: 10];
-    fIcons     = [[NSMutableArray alloc] initWithCapacity: 10];
 
     return self;
 }
 
-- (NSImage *) iconForFileType: (NSString *) type
+- (void) dealloc
 {
-    unsigned i;
+    [fIcons release];
-
+    [super dealloc];
-    /* See if we have this icon cached */
-    for( i = 0; i < [fFileTypes count]; i++ )
-        if( [[fFileTypes objectAtIndex: i] isEqualToString: type] )
-            break;
-
-    if( i == [fFileTypes count] )
-    {
-        /* Unknown file type, get its icon and cache it */
-        NSImage * icon;
-        icon = [[NSWorkspace sharedWorkspace] iconForFileType: type];
-        [icon setFlipped: YES];
-        [fFileTypes addObject: type];
-        [fIcons     addObject: icon];
 }
 
-    return [fIcons objectAtIndex: i];
+- (NSImage *) iconForFileType: (NSString *) type
+{
+    NSImage * icon;
+    if (!(icon = [fIcons objectForKey: type]))
+    {
+        /* Unknown file type, get its icon and cache it */
+        icon = [[NSWorkspace sharedWorkspace] iconForFileType: type];
+        [icon setFlipped: YES];
+
+        [fIcons setObject: icon forKey: type];
+    }
+
+    return icon;
 }
 
 - (void) setStat: (tr_stat_t *) stat whiteText: (BOOL) w