From 5ad23234d6988b65a4b71ecb10d1570facf84ea2 Mon Sep 17 00:00:00 2001
From: Roland Winkler <Roland.Winkler@physik.uni-erlangen.de>
Date: Sun, 9 Apr 2006 18:29:19 +0000
Subject: [PATCH] (bibtex-entry-update): New optional arg entry-type.  Add
 field delimiters to numerical fields if they are not present.

---
 lisp/textmodes/bibtex.el | 50 +++++++++++++++++++++++++++++++++---------------
 1 file changed, 35 insertions(+), 15 deletions(-)

diff --git a/lisp/textmodes/bibtex.el b/lisp/textmodes/bibtex.el
index a70ab1591ca..ff1c1e48eb0 100644
--- a/lisp/textmodes/bibtex.el
+++ b/lisp/textmodes/bibtex.el
@@ -2856,25 +2856,45 @@ is non-nil."
 	(bibtex-autofill-entry))
     (run-hooks 'bibtex-add-entry-hook)))
 
-(defun bibtex-entry-update ()
+(defun bibtex-entry-update (&optional entry-type)
   "Update an existing BibTeX entry.
 In the BibTeX entry at point, make new fields for those items that may occur
-according to `bibtex-field-list', but are not yet present."
-  (interactive)
+according to `bibtex-field-list', but are not yet present.
+Also, add field delimiters to numerical fields if they are not present.
+If ENTRY-TYPE is non-nil, change first the entry type to ENTRY-TYPE.
+When called interactively with a prefix arg, query for a value of ENTRY-TYPE."
+  (interactive
+   (list (if current-prefix-arg
+             (let ((completion-ignore-case t))
+               (completing-read "New entry type: " bibtex-entry-field-alist
+                                nil t nil 'bibtex-entry-type-history)))))
   (save-excursion
     (bibtex-beginning-of-entry)
-    ;; For inserting new fields, we use the fact that
-    ;; `bibtex-parse-entry' moves point to the end of the last field.
-    (let* ((fields-alist (bibtex-parse-entry))
-           (field-list (bibtex-field-list
-                        (cdr (assoc "=type=" fields-alist)))))
-      (skip-chars-backward " \t\n")
-      (dolist (field (car field-list))
-        (unless (assoc-string (car field) fields-alist t)
-          (bibtex-make-field field)))
-      (dolist (field (cdr field-list))
-        (unless (assoc-string (car field) fields-alist t)
-          (bibtex-make-optional-field field))))))
+    (when (looking-at bibtex-entry-maybe-empty-head)
+      (goto-char (match-end 0))
+      (if entry-type
+          (save-excursion
+            (replace-match (concat "@" entry-type) nil nil nil 1))
+        (setq entry-type (bibtex-type-in-head)))
+      (let* ((field-list (bibtex-field-list entry-type))
+             (required (copy-tree (car field-list)))
+             (optional (copy-tree (cdr field-list)))
+             bounds)
+        (while (setq bounds (bibtex-parse-field))
+          (let ((fname (bibtex-name-in-field bounds t))
+                (end (copy-marker (bibtex-end-of-field bounds) t)))
+            (setq required (delete (assoc-string fname required t) required)
+                  optional (delete (assoc-string fname optional t) optional))
+            (when (string-match "\\`[0-9]+\\'"
+                                (bibtex-text-in-field-bounds bounds))
+              (goto-char (bibtex-end-of-text-in-field bounds))
+              (insert (bibtex-field-right-delimiter))
+              (goto-char (bibtex-start-of-text-in-field bounds))
+              (insert (bibtex-field-left-delimiter)))
+            (goto-char end)))
+        (skip-chars-backward " \t\n")
+        (dolist (field required) (bibtex-make-field field))
+        (dolist (field optional) (bibtex-make-optional-field field))))))
 
 (defun bibtex-parse-entry (&optional content)
   "Parse entry at point, return an alist.
-- 
2.11.4.GIT