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Re: [O] Usage of org-element api


From: Rasmus
Subject: Re: [O] Usage of org-element api
Date: Sat, 17 Jan 2015 01:33:01 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux)

Hi Dieter,

Dieter Van Eessen <address@hidden> writes:

> Hello Rasmus,
>
> Thank you for the fast reply, the link you've given on interpreting is very
> useful ! Also didn't know there existed such thing as the org-dp library to
> manipulate org-elements, I'll sure check it out.

I don't know org-dp myself, but Thorsten posts here regularly.

> More about question number 3:
>>> 3) How can the output of (org-element-parse-secondary-string ...) be
>>> used.
>>> When I give a heading and bit of text as input (output of
>>> buffer-substring), it looks like it returns the 'content' of the region.
>>> Though I can't seem to use it anyway as 'CONTENT' for the functions
>>> requiring this.
>
> The reason I've tried this (and the internal org-element--parse-elements)
> is because I'd prefer not having to parse the whole buffer and still get
> the contents. The local parsing functions (org-element-at-point) and
> (org-element-context) don't contain content (stated in the org-element api,
> also tried it).

But all elements contain :begin and :end and most :contens-begin
and :contents-end (maybe sans an 's').

> Now I'm not sure IF I really NEED it? I could actually get the contents
> using the  :content-begin and :content-end and other properties from
> (org-elemen-at-point)  BUT I don't know the exact syntax the content should
> have and how to merge it with the element-list I get from
> (org-element-at-point) before feeding it to the org-element-interpret-data.

Maybe it would be easier if you state plainly what your desired goal is?
It's all a bit abstract.  You can write pretty sophisticated things using
just (org-element-at-point) (e.g. I have a function that escapes
*math-su{b,per}script* on double space at appropriate places).

> [...]
> At first I thought that the things behind #  were 'content' (for example in
> the output below. These don't show up in (org-element-at-point), thus
> explaining why they returned nil when asked for content. The
> org-element-parse-secondary-string also returns all things behind #. If
> this is NOT content, then how to manipulate this data (behind the #) whilst
> assuring that syntax and position remains valid for
> org-element-interpret-data to understand?

If you want to manipulate the buffer text use the great functions.  You
can condition on the element under point or whatever you desire and then
use the regular functions you'd otherwise use.  I'm probably wrong, but it
seems as if you trying to shoot flies with canons, or however the saying
goes in English.  Also, recall there is no such thing as wrong Org-syntax
(but there is unexpected outcomes).

Check Org.el if you want.

Cheers,
Rasmus

-- 
Not everything that goes around comes back around, you know




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