99 lines
3.1 KiB
EmacsLisp
99 lines
3.1 KiB
EmacsLisp
;;; logito.el --- logging library for Emacs
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;; Copyright (C) 2012 Yann Hodique
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;; Author: Yann Hodique <yann.hodique@gmail.com>
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;; Keywords: lisp, tool
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;; Package-Version: 20120225.1255
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;; Version: 0.1
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;; Package-Requires: ((eieio "1.3"))
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;; This file is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; This file is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; This module provides logging facility for Emacs
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;;; Code:
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(eval-when-compile
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(require 'cl))
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(require 'eieio)
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(defclass logito-object ()
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((level :initarg :level :initform nil)))
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(defmethod logito-insert-log ((log logito-object) format &rest objects)
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"Base implementation, do nothing")
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(defmethod logito-should-log ((log logito-object) level)
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(let ((l (oref log :level)))
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(and (integerp l)
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(<= level l))))
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(defmethod logito-log ((log logito-object) level tag string &rest objects)
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(when (logito-should-log log level)
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(apply 'logito-insert-log log (format "[%s] %s" tag string) objects)))
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(defmethod logito-log (log level tag string &rest objects)
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"Fallback implementation, do nothing. This allows in particular
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to pass nil as the log object."
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nil)
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(defclass logito-message-object (logito-object)
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())
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(defmethod logito-insert-log ((log logito-message-object) format &rest objects)
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(apply 'message format objects))
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(defclass logito-buffer-object (logito-object)
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((buffer :initarg :buffer :initform nil)))
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(defmethod logito-should-log ((log logito-buffer-object) level)
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(and (oref log :buffer)
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(call-next-method)))
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(defmethod logito-insert-log ((log logito-buffer-object) format &rest objects)
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(let ((buffer (get-buffer-create (oref log :buffer))))
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(with-current-buffer buffer
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(goto-char (point-max))
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(insert (apply 'format format objects) "\n\n"))))
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(defmacro logito-def-level (sym val &optional pkg)
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"Define a constant logito-<SYM>-level and a macro logito:<SYM>
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associated with this level."
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(let* ((pkg (or pkg 'logito))
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(const (intern (format "%s:%s-level"
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(symbol-name pkg) (symbol-name sym))))
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(mac (intern (format "%s:%s"
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(symbol-name pkg) (symbol-name sym)))))
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`(progn
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(defconst ,const ,val)
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(defmacro ,mac (log string &rest objects)
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(append
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(list 'logito-log log ,const '',sym string)
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objects)))))
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;; built-in log levels
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(logito-def-level error 0)
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(logito-def-level info 5)
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(logito-def-level verbose 10)
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(logito-def-level debug 15)
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(provide 'logito)
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;;; logito.el ends here
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