I have an exception being thrown when an open panel is open. I can't
reproduce it yet, but I really don't see what the problem is either. I
think I'm just triggering a bug in NSOpenPanel. Here's the exception:
*** -[NSCFArray objectAtIndex:]: index (-1( or possibly larger))
beyond bounds (2)
_NSArrayRaiseBoundException (in Foundation) + 127
-[NSCFArray objectAtIndex:] (in Foundation) + 72
-[NSNavBrowserDelegate browser:willDisplayCell:atRow:column:] (in
AppKit) + 94
-[NSBrowser _sendDelegateWillDisplayCell:atRow:column:] (in AppKit) +
134
-[NSBrowser _loadCell:atRow:col:inMatrix:] (in AppKit) + 561
-[NSMatrix drawRect:] (in AppKit) + 1587
...
The open panel should only allow text files to be selected. To do
that, I'm using panel:shouldShowFilename: ....
- (BOOL)panel:(id)sender shouldShowFilename:(NSString *)filename
{
NSDictionary * attributes = [[NSFileManager defaultManager]
fileAttributesAtPath:filename traverseLink:YES];
if (!attributes) return NO;
NSString * fileType = [attributes objectForKey:NSFileType];
NSString * hfsType = NSFileTypeForHFSTypeCode((OSType)[[attributes
objectForKey:NSFileHFSTypeCode] unsignedLongValue]);
NSString * utiType = [[NSWorkspace sharedWorkspace]
typeOfFile:filename error:nil];
NSString * extension = [filename pathExtension];
if ([[NSWorkspace sharedWorkspace] isFilePackageAtPath:filename]) {
return NO;
}
if ([fileType isEqual:NSFileTypeDirectory]) {
return YES;
}
if ([hfsType isEqual:NSFileTypeForHFSTypeCode('TEXT')]) {
return YES;
}
if ([[NSWorkspace sharedWorkspace] type:utiType conformsToType:
(NSString *)kUTTypePlainText]) {
return YES;
}
if ([[NSArray arrayWithObjects:@"txt", @"text", <etcetera>, nil]
containsObject:[extension lowercaseString]]) {
return YES;
}
NSString * usrBinFileType = [[NSFileManager defaultManager]
fileTypeForFileAtPath:filename];
if ([[usrBinFileType lowercaseString] containsString:@"text" options:
0]) {
return YES;
}
return NO;
}
It works its way down to the last if statement which launches /usr/bin/
file to figure out the type of the file. It's all straight forward
simple code, which simply returns YES or NO, but it's causing an
exception apparently, and I don't see how I could do anything different.
Any thoughts?
--
Seth Willits
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