Re: Tentative patch to keep org-babel-results-keyword when calling org-babel-remove-result

[Eric Schulte <schulte.eric@gmail.com>]

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Hi Daniele,

Thanks for the suggestion and the accompanying patch.  I've just applied
a modified version of your patch (included below).  Please let me know
if this is insufficient for your needs.

Best,


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From 136bdc0e83358fa3f6af1d8b3b0cd71cace61efe Mon Sep 17 00:00:00 2001
From: Eric Schulte <schulte.eric@gmail.com>
Date: Fri, 20 Sep 2013 15:07:15 -0600
Subject: [PATCH] org-babel-remove-result option keep result keyword

This patch is based off of a request and an initial patch supplied by
Daniele Pizzolli.

* lisp/ob-core.el (org-babel-remove-result): Added an option to keep
  the results keyword when removing the content of results.
---
 lisp/ob-core.el | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/lisp/ob-core.el b/lisp/ob-core.el
index cc6b7a9..e2404c1 100644
--- a/lisp/ob-core.el
+++ b/lisp/ob-core.el
@@ -2159,15 +2159,17 @@ code ---- the results are extracted in the syntax of the source
 	  (set-marker visible-beg nil)
 	  (set-marker visible-end nil))))))
 
-(defun org-babel-remove-result (&optional info)
+(defun org-babel-remove-result (&optional info keep-keyword)
   "Remove the result of the current source block."
   (interactive)
-  (let ((location (org-babel-where-is-src-block-result nil info)) start)
+  (let ((location (org-babel-where-is-src-block-result nil info)))
     (when location
-      (setq start (- location 1))
       (save-excursion
-        (goto-char location) (forward-line 1)
-        (delete-region start (org-babel-result-end))))))
+        (goto-char location)
+	(when (looking-at org-babel-result-regexp)
+	  (delete-region
+	   (if keep-keyword (1+ (match-end 0)) (match-beginning 0))
+	   (progn (forward-line 1) (org-babel-result-end))))))))
 
 (defun org-babel-result-end ()
   "Return the point at the end of the current set of results."
-- 
1.8.4


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Daniele Pizzolli <dan@toel.it> writes:

> Hello @ll,
>
> this is my fist post on the list.  Thanks to everybody for posting
> interesting things and keeping org-mode improving!
>
> I am seeking help because of my limited elisp knowledge.
>
> This is my incomplete patch to extend org-babel-remove-result to keep
> the org-babel-results-keyword when removing the results.
>
> I need to keep the org-babel-results-keyword because I want to commit
> to my dvcs a clean file and easily evaluate the results at any time
> later.
>
> Unfortunately running org-babel-remove-result on a snippet like the
> following:
>
> #+BEGIN_SRC octave :results value file
> % at the end produce an image
> #+END_SRC
>
> #+ATTR_LATEX: :width 3cm
> #+RESULTS:
> [[file:image_01.png]]
>
> Will output:
>
> #+BEGIN_SRC octave :results value file
> % at the end produce an image
> #+END_SRC
>
> #+ATTR_LATEX: :width 3cm
>
> And a run of org-babel-execute-buffer will produce:
>
> #+BEGIN_SRC octave :results value file
> % at the end produce an image
> #+END_SRC
>
> #+RESULTS:
> [[file:image_01.png]]
>
> #+ATTR_LATEX: :width 3cm
>
> changing the position of the LaTeX specific attribute #+ATTR_LATEX: in
> way that it becomes useless.
>
> The patch add an optional argument to org-babel-remove-result but
> relies to an hard-coded value of the length of the default
> org-babel-results-keyword plus syntax elements: "#+RESULTS:".
>
> Instead of calculating lengths I think that is better to move to next
> line.
>
> I also skipped a deletion of the last char assuming that is always a
> new line.  Is this assumption correct?  If we delete the last line
> we can end with:
>
> #+RESULTS:
> ** some other section
>
> That will cause problem in the next evaluation.
>
> I will appreciate your suggestions to improve the patch myself.  It
> would be great also if anybody can implement it properly and get it merged.
>
> Thanks in advance,
> Daniele Pizzolli
>
>
> diff --git a/lisp/ob-core.el b/lisp/ob-core.el
> index cc6b7a9..7517ebf 100644
> --- a/lisp/ob-core.el
> +++ b/lisp/ob-core.el
> @@ -2159,15 +2159,18 @@ code ---- the results are extracted in the syntax of the source
>   	  (set-marker visible-beg nil)
>   	  (set-marker visible-end nil))))))
>
> -(defun org-babel-remove-result (&optional info)
> -  "Remove the result of the current source block."
> +(defun org-babel-remove-result (&optional info keep-keyword)
> +  "Remove the result of the current source block.  Optionally
> +keep the result keyword."
>     (interactive)
>     (let ((location (org-babel-where-is-src-block-result nil info)) start)
>       (when location
> -      (setq start (- location 1))
> +      (setq start (if keep-keyword (+ location 10) (- location 1)))
>         (save-excursion
>           (goto-char location) (forward-line 1)
> -        (delete-region start (org-babel-result-end))))))
> +        (delete-region
> +	  start
> +          (if keep-keyword (- (org-babel-result-end) 1) (org-babel-result-end)))))))
>
>

-- 
Eric Schulte
https://cs.unm.edu/~eschulte
PGP: 0x614CA05D