From: Dr Rainer M Krug <r.m.krug@gmail.com>
To: Eric Schulte <schulte.eric@gmail.com>
Cc: emacs-orgmode <emacs-orgmode@gnu.org>
Subject: Re: [BABEL] tangling with leaving non-source code lines as empty lines?
Date: Tue, 13 Jul 2010 10:10:14 +0200 [thread overview]
Message-ID: <4C3C1F66.1070604@googlemail.com> (raw)
In-Reply-To: <874og4qkdy.fsf@gmail.com>
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On 13/07/2010 02:46, Eric Schulte wrote:
> Hi Rainer,
>
> With the tangling comments generated by the latest Org-mode, the
> following function should be able to jump from any code in a tangled
> code file back to the relevant block in the original Org-mode file.
Wow - that was quick.
Thanks.
>
> --8<---------------cut here---------------start------------->8---
> (defun org-babel-tangle-jump-to-org ()
> "Jump from a tangled code file to the related Org-mode file."
> (interactive)
> (let ((mid (point))
> target-buffer target-char
> start end link path block-name)
> (save-window-excursion
> (save-excursion
> (unless (and (re-search-backward org-bracket-link-analytic-regexp nil t)
> (setq start (point))
> (setq link (match-string 0))
> (setq path (match-string 3))
> (setq block-name (match-string 5))
> (re-search-forward (concat " " (regexp-quote block-name)
> " ends here[\n\r]") nil t)
> (setq end (point))
> (< start mid) (< mid end))
> (error "not in tangled code")))
> (when (string-match "::" path)
> (setq path (substring path 0 (match-beginning 0))))
> (find-file path) (setq target-buffer (current-buffer))
> (goto-char start) (org-open-link-from-string link)
> (if (string-match "[^ \t\n\r]:\\([[:digit:]]+\\)" block-name)
> (org-babel-next-src-block
> (string-to-int (match-string 1 block-name)))
> (org-babel-goto-named-src-block block-name))
> (setq target-char (point)))
> (pop-to-buffer target-buffer)
> (goto-char target-char)))
> --8<---------------cut here---------------end--------------->8---
>
I tried it out, and realised that one needs to name the blocks
(#+srcname:) to be able to use it. Then it jumps to the code block in
the org file.
Two more things (As pointed out in the other email) would be nice:
1) it would be nice to jump to the line of code in the Org-mode file
which corresponds to the line in the code file
2) It would be brilliant, if one could call the function from the
Org-file buffer and enter the line number and then jump to the block /
line in the block.
In addition:
3) it would be very useful, if this function could be used with
non-named source blocks.
But that function is already quite usefull.
Thanks,
Rainer
> This is too large of a block of untested code to push into Org-mode now,
> however please give it a try, and let me know if you think this could be
> generally useful. Hopefully after the feature-freeze we can fold
> something like this into Babel to ease navigation between Org files and
> their tangled offspring.
>
> Cheers -- Eric
>
> "Eric Schulte" <schulte.eric@gmail.com> writes:
>
>> Hi Rainer,
>>
>> If I'm understand you correctly you want the absolute position (by LOC)
>> of the lines of R code to be the same in both the original org file and
>> the tangled file or R code. I don't think this is possible. It is
>> possible to tangle code blocks in any order (not just the order in which
>> they appear in the original org file), so there are many valid tangling
>> scenarios in which this feature could not work.
>>
>> Rather, I think that it may make sense to have a function for jumping
>> back and forth between tangled code blocks and the related Org file. In
>> that case the R errors could be followed to the tangled R code file,
>> from which you could easily jump to the relevant line in the relevant
>> code block in the Org file. If you are tangling with comments, then it
>> should be possible to have a function called from a line in a tangled
>> code file which when called
>>
>> 1) finds it's enclosing comments
>> 2) remembers it's offset from the comments (which would then be it's
>> offset in the code block in the Org file)
>> 3) read the comment to learn which code block in which Org file it's
>> tangled from
>> 4) jump to the relevant line, in the relevant block, in the relevant
>> file
>>
>> Similarly when called form within a code block in an Org file the
>> function could
>>
>> 1) read it's header argument to find the relevant tangled code file
>> 2) jump to that file
>> 3) use the comments in that file to move to the appropriate section of
>> code and related line
>>
>> I'll think about such a function, and if it makes sense to implement it
>> apart from a more general "activate org-mode links in comments" minor
>> mode. Any ideas or suggestions would be welcome!
>>
>> Thanks -- Eric
>>
>> Rainer M Krug <r.m.krug@gmail.com> writes:
>>
>>> Hi Eric,
>>>
>>> would it be possible, when tangling, to leave lines without source code in
>>> the resulting code file as empty lines? The reasoning would be that error
>>> messages (at least in R) give the line in which the error occurred. If the
>>> line numbers in which the code sits would be preserved (by leaving empty
>>> lines where no code is in the .org file), debugging would be much easier.
>>>
>>> By the way: I am using the after tangle hook and it works absolutely
>>> perfectly.
>>>
>>> Thanks and cheers,
>>>
>>> Rainer
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next prev parent reply other threads:[~2010-07-13 8:10 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-12 15:19 [BABEL] tangling with leaving non-source code lines as empty lines? Rainer M Krug
2010-07-12 18:04 ` Eric Schulte
2010-07-13 0:46 ` Eric Schulte
2010-07-13 8:10 ` Dr Rainer M Krug [this message]
2010-07-13 17:22 ` Eric Schulte
2010-07-15 8:00 ` Rainer M Krug
2010-07-13 7:47 ` Dr Rainer M Krug
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