[ESS] Font-locking

[S. McKay Curtis]

Hi David,

Here's a hack that worked for me.  It will require editing the file
"ess-cust.el".  I would prefer to have something in my ".emacs" file
to do this rather than editing an actual ess file, but I haven't been
able to get anything to work that way.  Maybe somebody else knows
how...

The tricky part to this whole hack was figuring out how to get R to
tell me all of the function names in the base package.  You can do
that with the following commands:

base.obj <- objects("package:base",all.names=TRUE)
base.obj[-grep("(^[^.[:alpha:][:digit:]]|<-|__)",base.obj)]  ## remove
the "weird" functions (like "%*%") that are already font-locked.

Once I had a list of quoted commands from the R base package (which I
"cleaned" up by using keyboard macros, etc.), I did the following:

1) Open the file ess-cust.el

2) Comment out the lines

(defvar ess-R-keywords
  '("while" "for" "in" "repeat" "if" "else" "switch" "break" "next"
    "function" "return" "message" "warning" "stop"))

3) Add the following lines to "ess-cust.el"

(defvar ess-R-keywords
  '(".Alias" ".ArgsEnv" ".AutoloadEnv" <<THE REST OF THE REALLY LONG
LIST OF QUOTED COMMAND NAMES FROM R GOES HERE>> "xpdrows.data.frame"
"zapsmall"))

Obviously, you'd need to include the whole list of R functions, but
you get the idea.

4) Restart emacs and enjoy.

I'm still hoping somebody will show me a more elegant way, but the way
above works for now.

Regards,
McKay


On Wed, Apr 1, 2009 at 7:46 PM, David Scott <d.scott at auckland.ac.nz> wrote:
>
> I had a request from a student for a more colourful font locking for ESS.
> This is for Emacs on Windows. I imagine one change which the student might
> like would be a different colour for standard functions, which is what
> Tinn-R does.
>
> Does anyone have a customization of this type?
>
> David Scott
>
> _________________________________________________________________
> David Scott     Department of Statistics
>                The University of Auckland, PB 92019
>                Auckland 1142,    NEW ZEALAND
> Phone: +64 9 373 7599 ext 85055         Fax: +64 9 373 7018
> Email:  d.scott at auckland.ac.nz
>
> Graduate Officer, Department of Statistics
> Director of Consulting, Department of Statistics
>
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