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[elisp/lemi.git] / mime / signature.el

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+;;; signature.el --- a signature utility for GNU Emacs
+
+;; Copyright (C) 1994,1995,1996,1997,2000 Free Software Foundation, Inc.
+
+;; Author: MORIOKA Tomohiko <tomo@m17n.org>
+;;         OKABE Yasuo <okabe@kudpc.kyoto-u.ac.jp>
+;;         Shuhei KOBAYASHI <shuhei@aqua.ocn.ne.jp>
+;; Maintainer: Shuhei KOBAYASHI <shuhei@aqua.ocn.ne.jp>
+;; Created: 1994/7/11
+;; Keywords: mail, news, signature
+
+;; This file is part of SEMI (SEMI is Emacs MIME Interfaces).
+
+;; This program is free software; you can redistribute it and/or
+;; modify it under the terms of the GNU General Public License as
+;; published by the Free Software Foundation; either version 2, or (at
+;; your option) any later version.
+
+;; This program is distributed in the hope that it will be useful, but
+;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;; General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program; see the file COPYING.  If not, write to
+;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Code:
+
+(require 'std11)
+
+
+;;; @ valiables
+;;;
+
+(defvar signature-insert-at-eof nil
+  "*If non-nil, insert signature at the end of file.")
+
+(defvar signature-delete-blank-lines-at-eof nil
+  "*If non-nil, signature-insert-at-eof deletes blank lines at the end
+of file.")
+
+(defvar signature-load-hook nil
+  "*List of functions called after signature.el is loaded.")
+
+(defvar signature-separator "-- \n"
+  "*String to separate contents and signature.
+It is inserted when signature is inserted at end of file.")
+
+(defvar signature-file-name "~/.signature"
+  "*Name of file containing the user's signature.")
+
+(defvar signature-file-alist nil
+  "*Alist of the form:
+    (((FIELD . PATTERN) . FILENAME)
+     ...)
+PATTERN is a string or list of string. If PATTERN matches the contents of
+FIELD, the contents of FILENAME is inserted.")
+
+(defvar signature-file-prefix nil
+  "*String containing optional prefix for the signature file names")
+
+(defvar signature-insert-hook nil
+  "*List of functions called before inserting a signature.")
+
+(defvar signature-use-bbdb nil
+  "*If non-nil, Register sigtype to BBDB.")
+
+(autoload 'signature/get-sigtype-from-bbdb "mime-bbdb")
+
+(defun signature/get-sigtype-interactively (&optional default)
+  (read-file-name "Insert your signature: "
+                  (or default (concat signature-file-name "-"))
+                  (or default signature-file-name)
+                  nil))
+
+(defun signature/get-signature-file-name ()
+  (save-excursion
+    (save-restriction
+      (narrow-to-region
+       (goto-char (point-min))
+       (if (re-search-forward
+            (concat "^" (regexp-quote mail-header-separator) "$")
+            nil t)
+           (match-beginning 0)
+         (point-max)
+         ))
+      (catch 'found
+        (let ((alist signature-file-alist) cell field value)
+          (while alist
+            (setq cell  (car alist)
+                  field (std11-field-body (car (car cell)))
+                  value (cdr (car cell)))
+            (cond ((functionp value)
+                  (let ((name (apply value field (cdr cell))))
+                    (if name
+                        (throw 'found
+                               (concat signature-file-prefix name))
+                      )))
+                 ((stringp field)
+                  (cond ((consp value)
+                         (while value
+                           (if (string-match (car value) field)
+                               (throw 'found
+                                      (concat
+                                       signature-file-prefix (cdr cell)))
+                             (setq value (cdr value))
+                             )))
+                        ((stringp value)
+                         (if (string-match value field)
+                             (throw 'found
+                                    (concat
+                                     signature-file-prefix (cdr cell)))
+                           )))))
+            (setq alist (cdr alist))
+            ))
+        signature-file-name))))
+
+(defun insert-signature (&optional arg)
+  "Insert the file named by signature-file-name.
+It is inserted at the end of file if signature-insert-at-eof is non-nil,
+and otherwise at the current point.  A prefix argument enables user to
+specify a file named <signature-file-name>-DISTRIBUTION interactively."
+  (interactive "P")
+  (let ((signature-file-name
+         (expand-file-name
+          (or (and signature-use-bbdb
+                   (signature/get-sigtype-from-bbdb arg))
+              (and arg
+                   (signature/get-sigtype-interactively))
+              (signature/get-signature-file-name))
+          )))
+    (or (file-readable-p signature-file-name)
+        (error "Cannot open signature file: %s" signature-file-name))
+    (if signature-insert-at-eof
+        (progn
+          (goto-char (point-max))
+          (or (bolp) (insert "\n"))
+          (if signature-delete-blank-lines-at-eof (delete-blank-lines))
+          ))
+    (run-hooks 'signature-insert-hook)
+    (if (= (point)(point-max))
+       (insert signature-separator)
+      )
+    (insert-file-contents signature-file-name)
+    (force-mode-line-update)
+    signature-file-name))
+
+
+;;; @ end
+;;;
+
+(provide 'signature)
+
+(run-hooks 'signature-load-hook)
+
+;;; signature.el ends here