From b39925decd0e5ee5a0ce88b3fcea3a9647d35001 Mon Sep 17 00:00:00 2001
Message-Id: <b39925decd0e5ee5a0ce88b3fcea3a9647d35001.1648036699.git.yantar92@gmail.com>
From: Ihor Radchenko <yantar92@gmail.com>
Date: Sun, 20 Mar 2022 20:15:21 +0800
Subject: [PATCH] Auto-Upcase/downcase #+begin/#+end in structure templates

* lisp/org-tempo.el (org-tempo-add-block):
* lisp/org.el (org-insert-structure-template): When inserting
 #+begin_type/#+end_type, follow type's case.  TYPE will become
 #+BEGIN_TYPE and type will become #+bein_type.

(org-insert-structure-template): Make sure that we use
case-insensitive match even when user changes case-fold-search value.

(org-structure-template-alist): Clarify selection of #+BEGIN/END
vs. #+begin/end in the docstring.
---
 lisp/org-tempo.el | 13 ++++++++++---
 lisp/org.el       | 23 +++++++++++++++--------
 2 files changed, 25 insertions(+), 11 deletions(-)

diff --git a/lisp/org-tempo.el b/lisp/org-tempo.el
index b34007bf7..cd5ef9e8e 100644
--- a/lisp/org-tempo.el
+++ b/lisp/org-tempo.el
@@ -119,11 +119,18 @@ (defun org-tempo-add-block (entry)
   "Add block entry from `org-structure-template-alist'."
   (let* ((key (format "<%s" (car entry)))
 	 (name (cdr entry))
-	 (special (member name '("src" "export"))))
+	 (special (member name '("src" "export")))
+         (upcase? (string= (car (split-string name))
+                           (upcase (car (split-string name))))))
     (tempo-define-template (format "org-%s" (replace-regexp-in-string " " "-" name))
-			   `(,(format "#+begin_%s%s" name (if special " " ""))
+			   `(,(format "#+%s_%s%s"
+                                      (if upcase? "BEGIN" "begin")
+                                      name
+                                      (if special " " ""))
 			     ,(when special 'p) '> n ,(unless special 'p) n
-			     ,(format "#+end_%s" (car (split-string name " ")))
+			     ,(format "#+%s_%s"
+                                      (if upcase? "END" "end")
+                                      (car (split-string name " ")))
 			     >)
 			   key
 			   (format "Insert a %s block" name)
diff --git a/lisp/org.el b/lisp/org.el
index 9455c15c8..529146097 100644
--- a/lisp/org.el
+++ b/lisp/org.el
@@ -9490,9 +9490,11 @@ (defcustom org-structure-template-alist
     ("s" . "src")
     ("v" . "verse"))
   "An alist of keys and block types.
-`org-insert-structure-template' will display a menu with this
-list of templates to choose from.  The block type is inserted,
-with \"#+BEGIN_\" and \"#+END_\" added automatically.
+`org-insert-structure-template' will display a menu with this list of
+templates to choose from.  The block type is inserted, with
+\"#+begin_\" and \"#+end_\" added automatically.  If the block type
+consists of just uppercase letters, \"#+BEGIN_\" and \"#+END_\" are
+added instead.
 
 The menu keys are defined by the car of each entry in this alist.
 If two entries have the keys \"a\" and \"aa\" respectively, the
@@ -9624,18 +9626,23 @@ (defun org-insert-structure-template (type)
 Select a block from `org-structure-template-alist' then type
 either RET, TAB or SPC to write the block type.  With an active
 region, wrap the region in the block.  Otherwise, insert an empty
-block."
+block.
+
+When foo is written as FOO, upcase the #+BEGIN/END as well."
   (interactive
    (list (pcase (org--insert-structure-template-mks)
 	   (`("\t" . ,_) (read-string "Structure type: "))
 	   (`(,_ ,choice . ,_) choice))))
-  (let* ((region? (use-region-p))
+  (let* ((case-fold-search t) ; Make sure that matches are case-insensitive.
+         (region? (use-region-p))
 	 (region-start (and region? (region-beginning)))
 	 (region-end (and region? (copy-marker (region-end))))
 	 (extended? (string-match-p "\\`\\(src\\|export\\)\\'" type))
 	 (verbatim? (string-match-p
 		     (concat "\\`" (regexp-opt '("example" "export" "src")))
-		     type)))
+		     type))
+         (upcase? (string= (car (split-string type))
+                           (upcase (car (split-string type))))))
     (when region? (goto-char region-start))
     (let ((column (current-indentation)))
       (if (save-excursion (skip-chars-backward " \t") (bolp))
@@ -9643,7 +9650,7 @@ (defun org-insert-structure-template (type)
 	(insert "\n"))
       (save-excursion
 	(indent-to column)
-	(insert (format "#+begin_%s%s\n" type (if extended? " " "")))
+	(insert (format "#+%s_%s%s\n" (if upcase? "BEGIN" "begin") type (if extended? " " "")))
 	(when region?
 	  (when verbatim? (org-escape-code-in-region (point) region-end))
 	  (goto-char region-end)
@@ -9652,7 +9659,7 @@ (defun org-insert-structure-template (type)
 	  (end-of-line))
 	(unless (bolp) (insert "\n"))
 	(indent-to column)
-	(insert (format "#+end_%s" (car (split-string type))))
+	(insert (format "#+%s_%s" (if upcase? "END" "end") (car (split-string type))))
 	(if (looking-at "[ \t]*$") (replace-match "")
 	  (insert "\n"))
 	(when (and (eobp) (not (bolp))) (insert "\n")))
-- 
2.34.1