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-rw-r--r--lisp/files-x.el41
1 files changed, 31 insertions, 10 deletions
diff --git a/lisp/files-x.el b/lisp/files-x.el
index 0ba245d423a..2ae1a0e4045 100644
--- a/lisp/files-x.el
+++ b/lisp/files-x.el
@@ -256,19 +256,40 @@ from the -*- line ignoring the input argument VALUE."
(goto-char (point-min))
- ;; Skip interpreter magic line "#!"
- (when (looking-at "^\\(#!\\|'\\\\\"\\)")
+ ;; Skip interpreter magic line "#!" or XML declaration.
+ (when (or (looking-at file-auto-mode-skip)
+ (looking-at "<\\?xml[^>\n]*>$"))
(forward-line 1))
+ (comment-normalize-vars)
(let ((comment-style 'plain)
- (comment-start (or comment-start ";;; ")))
- (comment-region
- (prog1 (point)
- (insert "-*-")
- (setq beg (point-marker))
- (setq end (point-marker))
- (insert "-*-\n"))
- (point))))
+ (comment-start (or comment-start ";;; "))
+ (line-beg (line-beginning-position))
+ (ce nil))
+ ;; If the first line contains a comment.
+ (if (save-excursion
+ (and (looking-at comment-start-skip)
+ (goto-char (match-end 0))
+ (re-search-forward comment-end-skip)
+ (goto-char (match-beginning 0))
+ ;; Still on the same line?
+ (equal line-beg (line-beginning-position))
+ (setq ce (point))))
+ ;; Add local variables to the end of the existing comment.
+ (progn
+ (goto-char ce)
+ (insert " -*-")
+ (setq beg (point-marker))
+ (setq end (point-marker))
+ (insert "-*-"))
+ ;; Otherwise, add a new comment before the first line.
+ (comment-region
+ (prog1 (point)
+ (insert "-*-")
+ (setq beg (point-marker))
+ (setq end (point-marker))
+ (insert "-*-\n"))
+ (point)))))
(cond
((looking-at "[ \t]*\\([^ \t\n\r:;]+\\)\\([ \t]*-\\*-\\)")