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;; geiser-log.el -- logging utilities
;; Copyright (C) 2009, 2010 Jose Antonio Ortega Ruiz
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the Modified BSD License. You should
;; have received a copy of the license along with this program. If
;; not, see <http://www.xfree86.org/3.3.6/COPYRIGHT2.html#5>.
;; Start date: Sat Feb 07, 2009 12:07
;; Some utilities for maintaining a simple log buffer, mainly for
;; debugging purposes.
(require 'geiser-popup)
(require 'geiser-base)
(require 'comint)
;;; 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 2048
"Maximum size of individual Geiser log messages.")
(defvar geiser-log-verbose-p nil
"Log purely informational messages. Useful for debugging.")
(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."
(buffer-disable-undo)
(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
(goto-char (point-max))
(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 (&optional arg)
"Show Geiser log messages.
With prefix, activates all logging levels."
(interactive "P")
(when arg (setq geiser-log-verbose-p t))
(geiser-log--pop-to-buffer))
(defun geiser-log-clear ()
"Clean all logs."
(interactive)
(geiser-log--with-buffer (delete-region (point-min) (point-max))))
(defun geiser-log-toggle-verbose ()
"Toggle verbose logs"
(interactive)
(setq geiser-log-verbose-p (not geiser-log-verbose-p))
(message "Geiser verbose logs %s"
(if geiser-log-verbose-p "enabled" "disabled")))
(defun geiser-log--deactivate ()
(interactive)
(setq geiser-log-verbose-p nil)
(when (eq (current-buffer) (geiser-log--buffer)) (View-quit)))
(define-key geiser-messages-mode-map "c" 'geiser-log-clear)
(define-key geiser-messages-mode-map "Q" 'geiser-log--deactivate)
(provide 'geiser-log)
;;; geiser-log.el ends here
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