1 ;;; fuel-log.el -- logging utilities
3 ;; Copyright (C) 2008, 2009 Jose Antonio Ortega Ruiz
4 ;; See http://factorcode.org/license.txt for BSD license.
6 ;; Author: Jose Antonio Ortega Ruiz <jao@gnu.org>
7 ;; Keywords: languages, fuel, factor
8 ;; Start date: Sun Dec 14, 2008 01:00
12 ;; Some utilities for maintaining a simple log buffer, mainly for
13 ;; debugging purposes.
22 (defvar fuel-log--buffer-name "*fuel messages*"
23 "Name of the log buffer")
25 (defvar fuel-log--max-buffer-size 32000
26 "Maximum size of the Factor messages log")
28 (defvar fuel-log--max-message-size 512
29 "Maximum size of individual log messages")
31 (defvar fuel-log--verbose-p t
32 "Log level for Factor messages")
34 (defvar fuel-log--inhibit-p nil
35 "Set this to t to inhibit all log messages")
37 (defvar fuel-log--debug-p nil
38 "If t, all messages are logged no matter what")
41 (define-derived-mode factor-messages-mode fundamental-mode "FUEL Messages"
42 "Simple mode to log interactions with the factor listener"
44 (setq-local comint-redirect-subvert-readonly t)
45 (add-hook 'after-change-functions
47 (let ((inhibit-read-only t))
48 (when (> b fuel-log--max-buffer-size)
49 (delete-region (point-min) b))))
51 (setq buffer-read-only t))
53 (defun fuel-log--buffer ()
54 (or (get-buffer fuel-log--buffer-name)
55 (with-current-buffer (get-buffer-create fuel-log--buffer-name)
56 (factor-messages-mode)
59 (defun fuel-log--msg (type &rest args)
60 (when (or fuel-log--debug-p (not fuel-log--inhibit-p))
61 (with-current-buffer (fuel-log--buffer)
62 (let ((inhibit-read-only t))
64 (fuel-shorten-str (format "\n%s: %s\n" type (apply 'format args))
65 fuel-log--max-message-size))))))
67 (defsubst fuel-log--warn (&rest args)
68 (apply 'fuel-log--msg 'WARNING args))
70 (defsubst fuel-log--error (&rest args)
71 (apply 'fuel-log--msg 'ERROR args))
73 (defsubst fuel-log--info (&rest args)
74 (when fuel-log--verbose-p
75 (apply 'fuel-log--msg 'INFO args) ""))
80 ;;; fuel-log.el ends here