From 4b03365723a61dcad79e6df3052621382702f0b3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20Ankarstr=C3=B6m?= <john@ankarstrom.se>
Date: Mon, 13 Jun 2022 23:48:27 +0200
Subject: xroff.el: Clean up.

---
 xroff.el | 55 ++++++++++++++++++++++++++++++++++++++++---------------
 1 file changed, 40 insertions(+), 15 deletions(-)

diff --git a/xroff.el b/xroff.el
index 54ae981..38272fd 100644
--- a/xroff.el
+++ b/xroff.el
@@ -1,10 +1,30 @@
+;;; xroff.el --- major mode for xroff  -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2022 John Ankarström
+
+;; Author: John Ankarström <john@ankarstrom.se>
+;; Created: 10 Jul 2022
+;; Version: 0.1
+
+;; Keywords: troff groff
+;; URL: http://ankarstrom.se/~john/etc/xroff
+
+;; This file is not part of GNU Emacs.
+
+;; Permission to use, copy, modify and/or distribute this software for
+;; any purpose with or without fee is hereby granted.
+
+;;; Commentary:
+
+;; Major mode for xroff, an alternative, XML-like syntax for troff.
+
+;;; Code:
+
 (defvar xroff--request-regexp
   (rx "<"
-	 (group (+ (or "\\>"
-		       (not (in "> ")))))
-	 (group (* (or "\\>"
-		       (not ?>))))
-	 ">"))
+      (group (+ (or "\\>" (not (in "> ")))))
+      (group (* (or "\\>" (not ?>))))
+      ">"))
 
 (defvar xroff--single-escape-regexp
   (rx "\\" any))
@@ -23,34 +43,42 @@
       "'" (* (not "'")) "'"))
 
 (defconst xroff-font-lock-keywords
-  `(("<!--.*-->"
+  `(;; Comment.
+    ("<!--.*-->"
      (0 font-lock-comment-face))
+    ;; Request.
     (,(concat xroff--request-regexp)
-     (1 font-lock-keyword-face)
-     (2 font-lock-string-face))
+     (1 font-lock-keyword-face keep)
+     (2 font-lock-string-face keep))
     (,(concat "\\\\" xroff--request-regexp)
      (1 nil t)
      (2 nil t))
+    ;; Parameter escape (e.g., \l'...').
     (,xroff--parameter-escape-regexp
      (0 xroff-escape-face))
     (,(concat "\\\\" xroff--parameter-escape-regexp)
      (0 nil t))
+    ;; Identifier escape (e.g., \n(PI).
     (,xroff--identifier-escape-regexp
      (0 xroff-escape-face))
     (,(concat "\\\\" xroff--identifier-escape-regexp)
      (0 nil t))
+    ;; Single escape (e.g., \%).
     (,xroff--single-escape-regexp
      (0 xroff-escape-face))
     (,(concat "\\\\" xroff--single-escape-regexp)
      (0 nil t))
+    ;; Escaped backslash.
     (,"\\\\\\\\"
      (0 xroff-escape-face t))))
 
 (defface xroff-escape
   '((t (:foreground "gray")))
-  "`xroff-mode' face used to highlight backslash escapes.")
+  "`xroff-mode' face used to highlight backslash escapes."
+  :group 'xroff)
 (defvar xroff-escape-face 'xroff-escape)
 
+;;;###autoload
 (define-derived-mode xroff-mode text-mode "Xroff"
   "Major mode for editing documents with xroff syntax."
   ;; A start or end tag by itself on a line separates a paragraph.
@@ -65,14 +93,11 @@
   (setq-local comment-end " -->")
   ;; (setq-local comment-indent-function 'sgml-comment-indent)
   ;; (setq-local comment-line-break-function 'sgml-comment-indent-new-line)
-  (setq-local skeleton-further-elements '((completion-ignore-case t)))
-  (setq-local skeleton-end-hook
-	      (lambda ()
-		(or (eolp)
-		    (not (or (eq v2 '\n) (eq (car-safe v2) '\n)))
-		    (newline-and-indent))))
   (setq-local font-lock-defaults '((xroff-font-lock-keywords)))
   ;; (setq-local font-lock-multiline t)
   (setq-local comment-start-skip "<!--[ \t]*")
   (setq-local comment-end-skip "[ \t]*--[ \t\n]*>")
   (visual-line-mode 1))
+
+(provide 'xroff)
+;;; xroff.el ends here
-- 
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