From: Carsten Dominik <dominik@uva.nl>
To: Eric Schulte <schulte.eric@gmail.com>
Cc: Paul R <paul.r.ml@gmail.com>, emacs-orgmode@gnu.org
Subject: Re: Embedded elisp formulas, was: Spreadsheet and weighted means
Date: Thu, 2 Oct 2008 13:44:06 +0200 [thread overview]
Message-ID: <83E74583-842D-472D-98BD-3F445ED64FA4@uva.nl> (raw)
In-Reply-To: <87y717uamj.fsf@gmail.com>
On Oct 2, 2008, at 2:03 AM, Eric Schulte wrote:
> Paul R <paul.r.ml@gmail.com> writes:
>
>> On Wed, 01 Oct 2008 12:45:34 -0700, "Eric Schulte" <schulte.eric@gmail.com
>> > said:
>>
>>> This raises an issue I've been running into recently, If I have
>>> a multi-line elisp function (I guess same issue would apply for
>>> multi-line shell commands) that I want to use from an org file (for
>>> example to compute table columns), is there a way to save and load
>>> the function from the org file? I've tried multiline [[elisp: ]]
>>> links but they don't work well, maybe something like...
>>
>> maybe you can use the emacs facility to load code when visiting
>> a file. For more information, read the following info node :
>> File: emacs, Node: Specifying File Variables
>
> I looked at this, but then I ran across org-eval.el in the
> org/contrib/lisp directory. With (require 'org-eval) in my .emacs I
> can
> put something like the following
>
> <lisp>
> (defun my-specific-function-for-this-file (org-tabl-cell)
> (format "%S"
> (do-something-special
> (read org-tabl-cell))))
> </lisp>
>
> in an org file and org-eval is nice enough to evaluate the code
> defining
> the function upon opening the file, to display only the name of the
> function in a special face, and to allow me to edit the function in
> the
> appropriate mode with C-' (also works for ruby/shell/python/etc...).
> Everything I could have asked for!
>
> It nice to request a feature and find it's already implemented.
Before starting to use org-eval.el, I'd like to make sure that
everyone understands that loading org-eval.el turns any org-mode file
into an executable. That means that you have to start being careful
with org-mode files you receive from others or download from the
internet. Just like you would run a program from the web only if you
trust the source, you should then only load such files into Emacs if
you trust the source. I am not saying this to keep you from using org-
eval, I am am using it myself, but please be aware of this issue.
One more remark: a <lisp> tag is evaluated by jit-lock (i.e. by the
font-lock mechanism), just before Emacs tries to make it visible. The
reason for this is that the original indent for this functionality was
to produce and display dynamic content on a page. In large files,
font locking can be delayed until the segment in question comes into
view in the Emacs window.
To be sure to get this code evaluated immediately when visiting a
file, you might want to put the snippets close to the beginning of
the file.
- Carsten
next prev parent reply other threads:[~2008-10-02 11:44 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-20 7:00 Spreadsheet and weighted means Nicolas Goaziou
2008-09-29 8:43 ` Carsten Dominik
2008-09-29 8:44 ` Carsten Dominik
2008-10-01 16:46 ` Nicolas Goaziou
2008-10-01 19:26 ` Carsten Dominik
2008-10-01 19:45 ` Embedded elisp formulas, was: " Eric Schulte
2008-10-01 20:29 ` Paul R
2008-10-02 0:03 ` Eric Schulte
2008-10-02 11:44 ` Carsten Dominik [this message]
2008-10-08 23:12 ` ANN: org-eval-light.el was: " Eric Schulte
2008-11-06 1:19 ` Eric Schulte
2008-11-09 7:02 ` Carsten Dominik
2008-11-10 19:51 ` Daniel Clemente
2008-10-04 8:49 ` Nicolas Goaziou
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