summaryrefslogtreecommitdiff
path: root/lisp/erc/erc-replace.el
blob: e1c495c903610dcf419c39178e638167f9b0ca16 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
;; erc-replace.el -- wash and massage messages inserted into the buffer

;; Copyright (C) 2001-2002, 2004, 2006-2019 Free Software Foundation,
;; Inc.

;; Author: Andreas Fuchs <asf@void.at>
;; Keywords: IRC, client, Internet

;; This file is part of GNU Emacs.

;; GNU Emacs 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 3 of the License, or
;; (at your option) any later version.

;; GNU Emacs 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 GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;; This module allows you to systematically replace text in incoming
;; messages.  Load erc-replace, and customize `erc-replace-alist'.
;; Then add to your init file:

;; (require 'erc-replace)
;; (erc-replace-mode 1)

;;; Code:

(require 'erc)

(defgroup erc-replace nil
  "Replace text from incoming messages"
  :group 'erc)

(defcustom erc-replace-alist nil
  "Alist describing text to be replaced in incoming messages.
This is useful for filters.

The alist has elements of the form (FROM . TO).  FROM can be a regular
expression or a variable, or any sexp, TO can be a string or a
function to call, or any sexp.  If a function, it will be called with
one argument, the string to be replaced, and it should return a
replacement string."
  :group 'erc-replace
  :type '(repeat (cons :tag "Search & Replace"
		       (choice :tag "From"
			       regexp
			       variable
			       sexp)
		       (choice :tag "To"
			       string
			       function
			       sexp))))

(defun erc-replace-insert ()
  "Function to run from `erc-insert-modify-hook'.
It replaces text according to `erc-replace-alist'."
  (mapcar (lambda (elt)
	    (goto-char (point-min))
	    (let ((from (car elt))
		  (to (cdr elt)))
	      (unless (stringp from)
		(setq from (eval from)))
	      (while (re-search-forward from nil t)
		(cond ((stringp to)
		       (replace-match to))
		      ((and (symbolp to) (fboundp to))
		       (replace-match (funcall to (match-string 0))))
		      (t
		       (eval to))))))
	  erc-replace-alist))

;;;###autoload(autoload 'erc-replace-mode "erc-replace")
(define-erc-module replace nil
  "This mode replaces incoming text according to `erc-replace-alist'."
  ((add-hook 'erc-insert-modify-hook
	     'erc-replace-insert))
  ((remove-hook 'erc-insert-modify-hook
		'erc-replace-insert)))

(provide 'erc-replace)

;;; erc-replace.el ends here
;;
;; Local Variables:
;; generated-autoload-file: "erc-loaddefs.el"
;; indent-tabs-mode: t
;; tab-width: 8
;; End: