On 6 Nov 2007, at 9:17 PM, Major Domo wrote: On Nov 6, 2007, at 11:52 AM, Daniel Jalkut wrote: It sounds like you're in the unenviable zone of "something's messed in your sdef."
If I had to guess, I guess it's trying to evaluate the "set" command (implemented by NSSetCommand), but somehow it's gotten the notion that a different cocoa class (empty string?) has been configured as the handler for that type.
Daniel
The ways of AppleScript remain dark and mysterious. After implementing add <object> to <container> and remove <object> from <container> I noticed that if <object> was a singular medium, it would ignore the implementation class named for the command and only call the implementation method for medium's respond-to. However, if <object> was a plural (i.e. list of) media it would only call the class and not the method.
To put it another way: tell libraryDocument to add someMedium to someShelf calls: someMedium -implementationMethod:
while: tell libraryDocument to add someMedia to someShelf calls: ImplementationScriptCommand -performDefaultImplementation
I kind of expected one or the other to be called on the object receiving the tell, but in fact, not only is that not the case, I can't figure out a way to figure out who received the tell at all. I had thought: tell someShelf to add someMedium would be a good alternate form, but I could see no way to get someShelf out of the resulting NSScriptCommand.
Mike Lee, Major-domo Delicious Monster Software, LLC
It's very simple: the direct parameter of the command receives the command. In the first case, this is a medium. As it implements it's own specialized handler, that handler is called. In the second case, it is an array. The array does not implement a specialized handler, so the generic handler is called (performDefaultImplementation). The tell block here is not relevant (apart from giving a context for the medium and the shelf) because you have supplied an explicit direct parameter (otherwise the subject of the tell block would be implicitly substituted).
I advice you to carefully read the documentation about script command handlers.
Christiaan
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