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;; geiser-log.el -- logging utilities
;; Copyright (C) 2009 Jose Antonio Ortega Ruiz
;; Author: Jose Antonio Ortega Ruiz <jao@gnu.org>
;; Start date: Sat Feb 07, 2009 12:07
;; This file 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.
;; This file 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. If not, see <http://www.gnu.org/licenses/>.
;;; Comentary:
;; Some utilities for maintaining a simple log buffer, mainly for
;; debugging purposes.
;;; Code:
(require 'geiser-popup)
(require 'geiser-base)
;;; Customization:
(defvar geiser-log--buffer-name "*geiser messages*"
"Name of the Geiser log buffer.")
(defvar geiser-log--max-buffer-size 32000
"Maximum size of the Geiser messages log.")
(defvar geiser-log--max-message-size 512
"Maximum size of individual Geiser log messages.")
(defvar geiser-log--verbose-p t
"Log level for Geiser messages")
(defvar geiser-log--inhibit-p nil
"Set this to t to inhibit all log messages")
;;; Log buffer and mode:
(define-derived-mode geiser-messages-mode fundamental-mode "Geiser Messages"
"Simple mode for Geiser log messages buffer."
(kill-all-local-variables)
(buffer-disable-undo)
(set (make-local-variable 'comint-redirect-subvert-readonly) t)
(add-hook 'after-change-functions
'(lambda (b e len)
(let ((inhibit-read-only t))
(when (> b geiser-log--max-buffer-size)
(delete-region (point-min) b))))
nil t)
(setq buffer-read-only t))
(geiser-popup--define log geiser-log--buffer-name geiser-messages-mode)
;;; Logging functions:
(defun geiser-log--msg (type &rest args)
(unless geiser-log--inhibit-p
(geiser-log--with-buffer
(insert (geiser--shorten-str (format "\n%s: %s\n" type (apply 'format args))
geiser-log--max-message-size)))))
(defsubst geiser-log--warn (&rest args)
(apply 'geiser-log--msg 'WARNING args))
(defsubst geiser-log--error (&rest args)
(apply 'geiser-log--msg 'ERROR args))
(defsubst geiser-log--info (&rest args)
(when geiser-log--verbose-p
(apply 'geiser-log--msg 'INFO args) ""))
;;; User commands:
(defun geiser-show-logs ()
"Show Geiser log messages."
(interactive)
(geiser-log--pop-to-buffer))
(provide 'geiser-log)
;;; geiser-log.el ends here
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