This category to NSWorkspace adds the method “isInvisibleFileAtPath:” which checks wether the file at a given path is invisible or not. On Mac OS X there are many ways of making a file invisible, this method will check all, and has some hardcoded paths, it reflects visibility in Finder.app.

NSWorkspace (BSInvisibility) source preview

#import "NSWorkspace+BSInvisibility.h"


@implementation NSWorkspace (BSInvisibility)

- (BOOL)isInvisibleFileAtPath:(NSString *)path
{
  BOOL isHidden = NO; 
  
  LSItemInfoRecord itemInfo;
  LSCopyItemInfoForURL((CFURLRef)[NSURL URLWithString:path], kLSRequestAllFlags, &itemInfo);
  isHidden |= (itemInfo.flags & kLSItemInfoIsInvisible);
  
  FSRef possibleInvisibleFile; 
  FSCatalogInfo catalogInfo;
  FSPathMakeRef((unsigned const char *)[path fileSystemRepresentation], &possibleInvisibleFile, nil); 
  FSGetCatalogInfo(&possibleInvisibleFile, kFSCatInfoFinderInfo, &catalogInfo,  nil, nil, nil); 
  isHidden |= (((FileInfo*)catalogInfo.finderInfo)->finderFlags & kIsInvisible) ? 1 : 0;
  
  isHidden |= [path isEqualToString:@"/Network"];
  isHidden |= [path isEqualToString:@"/mach"];
  isHidden |= [path isEqualToString:@"/mach.sym"];
  isHidden |= [path isEqualToString:@"/dev"];
  
  return isHidden;
}

@end

NSWorkspace (BSInvisibility) header preview

#import <Cocoa/Cocoa.h>
#include <sys/param.h>
#include <sys/mount.h>

@interface NSWorkspace (BSInvisibility)

- (BOOL)isInvisibleFileAtPath:(NSString *)path;

@end

Compatible with:

• Mac OS X 10.0
• Mac OS X 10.1
• Mac OS X 10.2
• Mac OS X 10.3
• Mac OS X 10.4 PPC
• Mac OS X 10.4 Intel
• Mac OS X 10.5 PPC
• Mac OS X 10.5 Intel

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