Sorry, attached wrong version of the patch. Here is the right one
>From 0acb961d916d4bfde505c9f5eb16d1e8851b6c8f Mon Sep 17 00:00:00 2001 From: Ihor Radchenko <yanta...@gmail.com> Date: Sat, 13 Mar 2021 13:16:06 +0800 Subject: [PATCH] Improve org-link-plain-re * lisp/ol.el (org-link-make-regexps): Allow URLs with up to two levels of nested brackets. Now, URLs like [1] can be matched. The new regexp is taken from [2]. [1] https://doi.org/10.1016/0160-791x(79)90023-x [2] https://daringfireball.net/2010/07/improved_regex_for_matching_urls --- lisp/ol.el | 55 +++++++++++++++++++++++++++++++++++------------------- 1 file changed, 36 insertions(+), 19 deletions(-) diff --git a/lisp/ol.el b/lisp/ol.el index 8b9755b51..7ce7a4798 100644 --- a/lisp/ol.el +++ b/lisp/ol.el @@ -829,26 +829,43 @@ This should be called after the variable `org-link-parameters' has changed." (format "<%s:\\([^>\n]*\\(?:\n[ \t]*[^> \t\n][^>\n]*\\)*\\)>" types-re) org-link-plain-re - (concat - "\\<" types-re ":" - "\\([^][ \t\n()<>]+\\(?:([[:word:]0-9_]+)\\|\\([^[:punct:] \t\n]\\|/\\)\\)\\)") - ;; "\\([^]\t\n\r<>() ]+[^]\t\n\r<>,.;() ]\\)") - org-link-bracket-re - (rx (seq "[[" - ;; URI part: match group 1. - (group - (one-or-more + (let ((non-space-bracket "[^][ \t\n()<>]+")) + ;; Heiristics for an URL link. Source: + ;; https://daringfireball.net/2010/07/improved_regex_for_matching_urls + (rx-to-string + `(seq (regexp "\\<") + (regexp ,types-re) + ":" + (1+ (or (regex ,non-space-bracket) + (seq "(" + (* (or (regex ,non-space-bracket) + (seq "(" + (regex ,non-space-bracket) + ")"))) + ")"))) + (or (seq "(" + (* (or (regex ,non-space-bracket) + (seq "(" + (regex ,non-space-bracket) + ")"))) + ")") + (regexp "\\([^[:punct:] \t\n]\\|/\\)"))))) + org-link-bracket-re + (rx (seq "[[" + ;; URI part: match group 1. + (group + (one-or-more (or (not (any "[]\\")) - (and "\\" (zero-or-more "\\\\") (any "[]")) - (and (one-or-more "\\") (not (any "[]")))))) - "]" - ;; Description (optional): match group 2. - (opt "[" (group (+? anything)) "]") - "]")) - org-link-any-re - (concat "\\(" org-link-bracket-re "\\)\\|\\(" - org-link-angle-re "\\)\\|\\(" - org-link-plain-re "\\)")))) + (and "\\" (zero-or-more "\\\\") (any "[]")) + (and (one-or-more "\\") (not (any "[]")))))) + "]" + ;; Description (optional): match group 2. + (opt "[" (group (+? anything)) "]") + "]")) + org-link-any-re + (concat "\\(" org-link-bracket-re "\\)\\|\\(" + org-link-angle-re "\\)\\|\\(" + org-link-plain-re "\\)")))) (defun org-link-complete-file (&optional arg) "Create a file link using completion." -- 2.26.2
