Hello, I'm updating some code in which images get added to text as symbolic links, and I'm a little confused about some differences I am seeing in code I thought should act the same.
Specifically, in 10.6, NSFileWrapper's -initSymbolicLinkWithDestination: method has been replaced with -iniSymbolicLinkWithDestinationURL:. I use this method to add an image to text as a symbolic link along these lines: NSFileWrapper *wrapper = [[NSFileWrapper alloc] initSymbolicLinkWithDestination:@"/users/mypath/myimg.jpg"]; NSTextAttachment *attachment = [[NSTextAttachment alloc] initWithFileWrapper:wrapper]; NSAttributedString *aStr = [NSAttributedString attributedStringWithAttachment:attachment]; [[textView textStorage] replaceCharactersInRange:imgRange withAttributedString:aStr]; [attachment release]; [wrapper release]; This result of this is that you end up with an image in the text, and if you double-click on the image it opens the image from file in its default editor - exactly the same as if you held down the Control key while dropping an image into TextEdit, for instance. So, I assumed that just replacing the deprecated method with -initSymbolicLinkWithDestinationURL: would do the same thing, given that the only difference is that one takes an NSString and the other takes an NSURL: NSFileWrapper *wrapper = [[NSFileWrapper alloc] initSymbolicLinkWithDestinationURL:[NSURL fileURLWithPath:@"/users/mypath/myimg.jpg"]]; // ...rest of the code the same. However, it doesn't. The image doesn't get set automatically - instead you see the default symbolic link icon (a blank document icon) where the image appears if you use the deprecated file wrapper method instead. (Note that I've checked the created NSURL exactly matches the -symbolicLinkDestinationURL returned when creating the wrapper using the deprecated method, so it doesn't seem to be a problem with the URL itself.) It's easy enough to set the image myself, of course, with a few extra lines of code: NSURL *fileURL = [NSURL fileURLWithPath:@"/users/mypath/myimg.jpg"]; NSFileWrapper *wrapper = [[NSFileWrapper alloc] initSymbolicLinkWithDestinationURL:fileURL]; NSTextAttachment *attachment = [[NSTextAttachment alloc] initWithFileWrapper:wrapper]; // Add the image explicitly given that NSTextAttachment doesn't do it automatically in this instance. NSImage *image = [[NSImage alloc] initWithContentsOfURL:fileURL]; [(NSTextAttachmentCell *)[attachment attachmentCell] setImage:image]; [image release]; NSAttributedString *aStr = [NSAttributedString attributedStringWithAttachment:attachment]; [[textView textStorage] replaceCharactersInRange:NSMakeRange(0,0) withAttributedString:aStr]; [attachment release]; [wrapper release]; But my understanding from the NSTextAttachment docs is that this should be automatic: -- Discussion This method is the designated initializer for the NSTextAttachment class. If aWrapper contains an image file that the receiver can interpret as an NSImage object, sets the attachment cell’s image to the NSImage rather than to the icon of aWrapper. -- My guess is that this is a bug in NSTextAttachment - that NSTextAttachment hasn't been updated to grab the image from a destination URL; but then, this doesn't make sense as NSLogging reveals that -initSymbolicLinkWithDestinationURL: sets the NSString -symbolicLinkDestination as well as the URL form. So, before I report this as a possible bug: 1) Am I making a bad assumption - should I have always been setting the NSTextAttachment cell image manually anyway? 2) Am I making some other mistake in the code above that would cause the difference between using -initSymbolicLinkWithDestination: and -initSymbolicLinkWithDestinationURL: Not a big deal, obviously, as it's easy to fix with three lines of code, I'm just curious as to why there is a difference in case I'm missing something. Thanks and all the best, Keith _______________________________________________ Cocoa-dev mailing list ([email protected]) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [email protected]
