[TxMt] Obj-C: goto method declaration

[Allan Odgaard]

On 3. Oct 2006, at 20:54, Pierre Bernard wrote:

> I am just getting started with TextMate. I don't know yet what is  
> needed to write my own command.
>
> There are however a few features that should be closely related:
> - ctrl-H for documentation lookup must be able to parse the current  
> selection so it knows where to head in the documentation

When you run a command you can access both current selection and  
current word/line/etc. as environment variables (and you can also get  
it from stdin).

So this is pretty easy, e.g. if the header is in the same directory,  
and you do not have a space after the return type and name of the  
function, you could likely find it using:

     grep -n "\)${TM_SELECTED_TEXT:-$TM_CURRENT_WORD}" *.h

If e.g. I have my caret on the ‘stringByDeletingPathExtensions’ word  
and run that command, the result is:

     CocoaExtensions.h:63:- (NSString*)stringByDeletingPathExtensions;

So this gives file name + line number of match. If you do this from a  
scripting language (instead of bash) it should be easy to parse that  
line. You can use the mate shell command to then open ‘--line 63  
CocoaExtensions.h’.

A twist is that Objective-C method names are actually split in  
multiple parts, so to be more robust you would need to merge that --  
in the Objective-C bundle there is a (Format) Method Call command.  
This has ‘meta.bracketed.objc’ set as scope selector and as input it  
takes ‘Current Scope’ -- the ‘meta.bracketed.objc’-scope refers to  
stuff inside brackets (see about Scope Selectors in the manual).

The command will then need to parse out the actual method name from  
this.