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Re: [O] Help with fixing an org-mode multicolumn implementation - LaTeX


From: mcg
Subject: Re: [O] Help with fixing an org-mode multicolumn implementation - LaTeX special characters
Date: Thu, 25 Feb 2016 12:33:21 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Icedove/38.5.0

Hello Aaron,
[I noticed I did not answer to the list; just writing again to add it to the list]

this fix works perfect!  Thank you very much.
Never mind about multirow...

Michael


On 22/02/16 16:48, Aaron Ecay wrote:
Hi mcg,

2016ko otsailak 21an, mcg-ek idatzi zuen:
I found a very nice implementation of LaTeX multicolumn functionality in
this thread:
https://lists.gnu.org/archive/html/emacs-orgmode/2013-02/msg00736.html
[...]

However, using any of the characters of the left column of my example
table in the merged <2colc> column, I get:
"setq: Invalid use of `\' in replacement text"
I think the function should be written (untested):

(defun my-latex-multicolumn-filter (row backend info)
   (when (org-export-derived-backend-p backend 'latex)
     (while (string-match 
"\\(<\\([0-9]+\\)col\\([lrc]\\)?>[[:blank:]]*\\([^&]+\\)\\)" row)
       (let ((columns (string-to-number (match-string 2 row)))
             (start (match-end 0))
             (contents (replace-regexp-in-string "[[:blank:]]*$" "" 
(match-string 4 row)))
             (algn (or (match-string 3 row) "l")))
         (setq row (replace-match
                    (format "\\multicolumn{%d}{%s}{%s}" columns algn contents)
                    nil t row 1))
         (while (and (> columns 1) (string-match "&" row start))
           (setq row (replace-match "" nil nil row))
           (decf columns))))
     row))

The change is setting the third argument (‘literal’) to ‘replace-match’
to t, and deleting an extra backslash in the "\\multicolumn..." string.


Questions:
- How to escape the special characters in the left column properly to be
able to use them? (tried everything I could think of)
or
- How to modify the code above so that it allows for such characters.

- If anyone likes the implementation and is more capable than I am, then
the same for multirow would be really nice...
Unfortunately I think that’s more complicated, since it would necessitate
examining/modifying the whole table in one go, rather than operating one
row at a time.





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