1 ;;; m4-mode.el --- m4 code editing commands for Emacs
3 ;; Copyright (C) 1996-1997, 2001-2019 Free Software Foundation, Inc.
5 ;; Author: Andrew Csillag <drew@thecsillags.com>
6 ;; Keywords: languages, faces
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software: you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation, either version 3 of the License, or
13 ;; (at your option) any later version.
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
25 ;; A smart editing mode for m4 macro definitions. It seems to have most of the
26 ;; syntax right (sexp motion commands work, but function motion commands don't).
27 ;; It also sets the font-lock syntax stuff for colorization
31 ;; * want to make m4-m4-(buffer|region) look sorta like M-x compile look&feel ?
32 ;; * sexp motion commands don't seem to work right
35 ;;; to Akim Demaille and Terry Jones for the bug reports
36 ;;; to Simon Marshall for the regexp tip
37 ;;; to Martin Buchholz for some general fixes
42 "m4 code editing commands for Emacs."
43 :link '(custom-group-link :tag "Font Lock Faces group" font-lock-faces)
47 (defcustom m4-program "m4"
48 "File name of the m4 executable.
49 If m4 is not in your PATH, set this to an absolute file name."
55 (defcustom m4-program-options nil
56 "Options to pass to `m4-program'."
57 :type '(repeat string)
60 ;;to use --prefix-builtins, you can use
61 ;;(defconst m4-program-options '("-P"))
63 ;;(defconst m4-program-options '("--prefix-builtins"))
65 (defvar m4-font-lock-keywords
66 '(("\\(\\_<\\(m4_\\)?dnl\\_>\\).*$" (0 font-lock-comment-face t))
67 ("\\$[*#@0-9]" . font-lock-variable-name-face)
68 ("\\$@" . font-lock-variable-name-face)
69 ("\\$\\*" . font-lock-variable-name-face)
70 ("\\_<\\(m4_\\)?\\(builtin\\|change\\(com\\|quote\\|word\\)\\|d\\(e\\(bug\\(file\\|mode\\)\\|cr\\|f\\(ine\\|n\\)\\)\\|iv\\(ert\\|num\\)\\|nl\\|umpdef\\)\\|e\\(rrprint\\|syscmd\\|val\\)\\|f\\(ile\\|ormat\\)\\|gnu\\|i\\(f\\(def\\|else\\)\\|n\\(c\\(lude\\|r\\)\\|d\\(ex\\|ir\\)\\)\\)\\|l\\(en\\|ine\\)\\|m\\(4\\(exit\\|wrap\\)\\|aketemp\\)\\|p\\(atsubst\\|opdef\\|ushdef\\)\\|regexp\\|s\\(hift\\|include\\|ubstr\\|ys\\(cmd\\|val\\)\\)\\|tra\\(ceo\\(ff\\|n\\)\\|nslit\\)\\|un\\(d\\(efine\\|ivert\\)\\|ix\\)\\)\\_>" . font-lock-keyword-face))
71 "Default `font-lock-keywords' for M4 mode.")
73 (defcustom m4-mode-hook nil
74 "Hook called by `m4-mode'."
78 ;;this may still need some work
79 (defvar m4-mode-syntax-table
80 (let ((table (make-syntax-table)))
81 (modify-syntax-entry ?` "('" table)
82 (modify-syntax-entry ?' ")`" table)
83 (modify-syntax-entry ?# "<\n" table)
84 (modify-syntax-entry ?\n ">#" table)
85 (modify-syntax-entry ?{ "." table)
86 (modify-syntax-entry ?} "." table)
87 (modify-syntax-entry ?_ "_" table)
88 (modify-syntax-entry ?* "." table)
89 (modify-syntax-entry ?\" "." table)
91 "Syntax table used while in `m4-mode'.")
93 (defun m4--quoted-p (pos)
94 "Return non-nil if POS is inside a quoted string."
96 (dolist (o (nth 9 (save-excursion (syntax-ppss pos))))
97 (if (eq (char-after o) ?\`) (setq quoted t)))
100 (defconst m4-syntax-propertize
101 (syntax-propertize-rules
102 ("#" (0 (when (m4--quoted-p (match-beginning 0))
103 (string-to-syntax "."))))))
106 (let ((map (make-sparse-keymap))
107 (menu-map (make-sparse-keymap)))
108 (define-key map "\C-c\C-b" 'm4-m4-buffer)
109 (define-key map "\C-c\C-r" 'm4-m4-region)
110 (define-key map "\C-c\C-c" 'comment-region)
111 (define-key map [menu-bar m4-mode] (cons "M4" menu-map))
112 (define-key menu-map [m4c]
113 '(menu-item "Comment Region" comment-region
114 :help "Comment Region"))
115 (define-key menu-map [m4b]
116 '(menu-item "M4 Buffer" m4-m4-buffer
117 :help "Send contents of the current buffer to m4"))
118 (define-key menu-map [m4r]
119 '(menu-item "M4 Region" m4-m4-region
120 :help "Send contents of the current region to m4"))
123 (defun m4-m4-buffer ()
124 "Send contents of the current buffer to m4."
126 (shell-command-on-region
127 (point-min) (point-max)
128 (mapconcat 'identity (cons m4-program m4-program-options) "\s")
130 (switch-to-buffer-other-window "*m4-output*"))
132 (defun m4-m4-region ()
133 "Send contents of the current region to m4."
135 (shell-command-on-region
137 (mapconcat 'identity (cons m4-program m4-program-options) "\s")
139 (switch-to-buffer-other-window "*m4-output*"))
141 (defun m4-current-defun-name ()
142 "Return the name of the M4 function at point, or nil."
144 (if (re-search-backward
145 "^\\(\\(m4_\\)?define\\|A._DEFUN\\)(\\[?\\([A-Za-z0-9_]+\\)" nil t)
146 (match-string-no-properties 3))))
149 (define-derived-mode m4-mode prog-mode "m4"
150 "A major mode to edit m4 macro files."
151 (setq-local comment-start "#")
152 (setq-local parse-sexp-ignore-comments t)
153 (setq-local add-log-current-defun-function #'m4-current-defun-name)
154 (setq-local syntax-propertize-function m4-syntax-propertize)
155 (setq-local font-lock-defaults '(m4-font-lock-keywords nil)))
158 ;;stuff to play with for debugging
159 ;(char-to-string (char-syntax ?`))
161 ;;;how I generate the nasty looking regexps at the top
162 ;;;(make-regexp '("builtin" "changecom" "changequote" "changeword" "debugfile"
163 ;;; "debugmode" "decr" "define" "defn" "divert" "divnum" "dnl"
164 ;;; "dumpdef" "errprint" "esyscmd" "eval" "file" "format" "gnu"
165 ;;; "ifdef" "ifelse" "include" "incr" "index" "indir" "len" "line"
166 ;;; "m4exit" "m4wrap" "maketemp" "patsubst" "popdef" "pushdef" "regexp"
167 ;;; "shift" "sinclude" "substr" "syscmd" "sysval" "traceoff" "traceon"
168 ;;; "translit" "undefine" "undivert" "unix"))
169 ;;;(make-regexp '("m4_builtin" "m4_changecom" "m4_changequote" "m4_changeword"
170 ;;; "m4_debugfile" "m4_debugmode" "m4_decr" "m4_define" "m4_defn"
171 ;;; "m4_divert" "m4_divnum" "m4_dnl" "m4_dumpdef" "m4_errprint"
172 ;;; "m4_esyscmd" "m4_eval" "m4_file" "m4_format" "m4_ifdef" "m4_ifelse"
173 ;;; "m4_include" "m4_incr" "m4_index" "m4_indir" "m4_len" "m4_line"
174 ;;; "m4_m4exit" "m4_m4wrap" "m4_maketemp" "m4_patsubst" "m4_popdef"
175 ;;; "m4_pushdef" "m4_regexp" "m4_shift" "m4_sinclude" "m4_substr"
176 ;;; "m4_syscmd" "m4_sysval" "m4_traceoff" "m4_traceon" "m4_translit"
177 ;;; "m4_m4_undefine" "m4_undivert"))
179 ;;; m4-mode.el ends here