From mboxrd@z Thu Jan  1 00:00:00 1970
From: Federico Beffa <beffa@ieee.org>
Subject: [PATCH] org.el: make org-paragraph-fill ignore \[...\] regions
 starting and ending a line
Date: Thu, 7 Aug 2014 15:56:13 +0200
Message-ID: <CAKrPhPMB+wmQCfX11nP+dR5Wb19_=m4d7QXTqUdfuOOLNUw90Q@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Return-path: <emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org>
Received: from eggs.gnu.org ([2001:4830:134:3::10]:49189)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <federico.beffa@gmail.com>) id 1XFOAy-0001cm-LN
	for emacs-orgmode@gnu.org; Thu, 07 Aug 2014 09:56:20 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <federico.beffa@gmail.com>) id 1XFOAx-0003Io-M5
	for emacs-orgmode@gnu.org; Thu, 07 Aug 2014 09:56:16 -0400
Received: from mail-la0-x22e.google.com ([2a00:1450:4010:c03::22e]:41959)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <federico.beffa@gmail.com>) id 1XFOAx-0003IS-Dz
	for emacs-orgmode@gnu.org; Thu, 07 Aug 2014 09:56:15 -0400
Received: by mail-la0-f46.google.com with SMTP id b8so3554690lan.19
	for <emacs-orgmode@gnu.org>; Thu, 07 Aug 2014 06:56:13 -0700 (PDT)
List-Id: "General discussions about Org-mode." <emacs-orgmode.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/emacs-orgmode>
List-Post: <mailto:emacs-orgmode@gnu.org>
List-Help: <mailto:emacs-orgmode-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=subscribe>
Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
Sender: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
To: emacs-orgmode@gnu.org

> Attached you find a patch with the proposed modification. I would
> greatly appreciate if you could consider it for inclusion in org-mode
> and provide feedback.

Here a more lispy version of the function
`org-fill-paragraph-construct-regions' used in the patch.I guess it
could be more appealing to people on this list :-)

(defun org-fill-paragraph-construct-regions (lbl dmrl)
  "Construct paragraph regions to be filled.

This function takes an ordered list LBL with the positions of org
`line-break' objects and an ordered list DMRL with the start and
end positions of \\=\\[...\\=\\] LaTeX macros beginning and
ending a line.  It returns a list of the form ((r1-beg r1-end)
... (rN-beg rN-end)) with the start end end positions of the
paragraph regions to be filled."
  (let ((lbl-len (length lbl))) ; compute only once length of lbl
    (or
     ;; elementary case 1: no display math regions and 2 entries in lbl
     (and (not dmrl)
      (eq lbl-len 2)
      (list lbl))
     ;; elementary case 2: 1 remaining line break (end of paragraph) and
     ;; 1 remaining display math region.
     (and (eq (length dmrl) 1)
      (eq lbl-len 1)
      (list (list (nth 1 dmrl) (car lbl))))
     ;; remove line-breaks within display math regions
     (and dmrl (>= (nth 1 lbl) (caar dmrl))
      (<= (nth 1 lbl) (nth 1 (car dmrl)))
      (if (> lbl-len 2)
          (org-fill-paragraph-construct-regions2
           (cons (car lbl) (cddr lbl))
           dmrl)
        ;; a displayed math region finished the paragraph
        (org-fill-paragraph-construct-regions2
         (cons (car lbl) (list (caar dmrl)))
         nil)))
     ;; non elementary cases:
     (if (and dmrl (> (nth 1 lbl) (caar dmrl)))
     (cons (list (car lbl) (caar dmrl))
           (org-fill-paragraph-construct-regions2
        (cons (nth 1 (car dmrl)) (cdr lbl))
        (cdr dmrl)))
       (cons (list (car lbl) (nth 1 lbl))
         (org-fill-paragraph-construct-regions2
          (cdr lbl)
          dmrl))))))

Regards,
Federico