On Dec 7, 2014, at 3:46 AM, sqwarqDev <[email protected]> wrote:
> As the title suggests, I'm building an AppleScript editor (Objective-C, not
> Swift). I've got reasonably far replicating the abilities of the in-built
> Script editor and have even added a few bells and whistles. However, I'm
> stuck, conceptually, on one particular hump.
> will produce something like this:
Are you aware of the OSAKit framework and the OSAScriptView and
OSAScriptController classes? I don't find documentation, but the headers seem
relatively straightforward. From the looks of it, a lot of the functionality
of Script Editor is just a thin wrapper around these classes.
>> AEDescriptor is:
>> <NSAppleEventDescriptor: 'capp'{ 'desk':'obj '{ 'form':'name',
>> 'want':'cfol', 'seld':'utxt'("Fusion:Users:sphil:Desktop:"), ..., ....
>
> To see the output I want, just run the AppleScript code in OS X's built-in
> Script Editor and look at the Results pane.
>
> I can get seld's 'utxt' easily enough with the stringValue property, but I'm
> assuming the rest require parsing the codes from the target app's dictionary
> (unless someone know's a better way).
> ii. parse the AEDescriptor result for the four-letter codes
> --> (currently, my thinking here is to turn the whole result into an
> NSString and use an NSScanner)
That's crazy. An NSAppleEventDescriptor is already a data structure.
Converting it into a string and then parsing the string into a data structure
is just redundant.
What you've shown above is just the description string of the
NSAppleEventDescriptor. It's not its native content.
You can query the descriptor for its -descriptorType. If it's typeAEList, then
you would use -numberOfItems and -descriptorAtIndex: to iterate over the
elements. Remember that -descriptorAtIndex: takes one-based indexes.
In many cases, the descriptor will be a record. The descriptor you showed
above is a record. A record can have an arbitrary descriptorType. You can use
AECheckIsRecord(anAEDescriptor.aeDesc) to test if it's a record. I don't see a
Cocoa equivalent. The descriptorType will indicate what specific type of
record it is. Here you would need to consult the scripting terminology
dictionary to figure out what class it represents. However, even without
knowing the class, you can enumerate the keywords using -numberOfItems and
-keywordForDescriptorAtIndex: (again, one-based index). For each keyword, you
can get the value descriptor using -descriptorForKeyword:. Actually, if you're
iterating by index, you can also use -descriptorAtIndex: to get the value, too.
An AERecord is a special type of AEList, so it can be accessed like a list.
Given that each value is a descriptor, you can apply the same techniques
recursively to traverse them. Obviously, you'll eventually get to leaf nodes,
which won't be lists or records. Those will have descriptorTypes of
typeUnicodeText or typeSInt32 or the like.
Regards,
Ken
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