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describe.lisp
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describe.lisp
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;;; -*- Mode: Lisp; Package: COMMON-LISP -*-
;;; (c) copyright 2002 by Michael McDonald (mikemac@mikemac.com)
;;; This library is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Library General Public
;;; License as published by the Free Software Foundation; either
;;; version 2 of the License, or (at your option) any later version.
;;;
;;; This library 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
;;; Library General Public License for more details.
;;;
;;; You should have received a copy of the GNU Library General Public
;;; License along with this library; if not, write to the
;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;;; Boston, MA 02111-1307 USA.
(in-package :clim-lisp)
(defun describe (thing &optional stream)
(if (null stream)
(setq stream *standard-output*)
(if (eq stream t)
(setq stream *terminal-io*)))
(describe-object thing stream)
(values))
(defgeneric describe-object (thing stream))
;;; For these methods, stream should be of type
;;; (or EXTENDED-OUTPUT-STREAM OUTPUT-RECORDING-STREAM)
;;; but CLIM-STREAM-PANE is used instead.
(clim-internals::with-system-redefinition-allowed
(defmethod describe-object ((thing t) stream)
(let ((*print-array* nil))
(clim:present thing (clim:presentation-type-of thing)
:stream stream)
(format stream " is of type ")
(clim:present (type-of thing) (clim:presentation-type-of (type-of thing))
:stream stream)
(terpri stream)))
)
(defmethod describe-object ((thing symbol) stream)
(clim:present thing (clim:presentation-type-of thing)
:stream stream)
(format stream " is of type ")
(clim:present (type-of thing) (clim:presentation-type-of (type-of thing))
:stream stream)
(terpri stream)
(cond
((not (boundp thing))
(format stream " it is unbound~%"))
(t
(format stream " it has a value of ")
(clim:present (symbol-value thing) (clim:presentation-type-of (symbol-value thing))
:stream stream)
(terpri)))
(format stream " it is in the ")
(clim:present (symbol-package thing) (clim:presentation-type-of (symbol-package thing))
:stream stream)
(format stream " package~%")
(when (fboundp thing)
(format stream " it has a function definition of ~S~%" (symbol-function thing))
(format stream " which has the argument list ")
(let ((arglist #+excl (excl:arglist (symbol-function thing))
#+cmu (kernel:%function-arglist (symbol-function thing))
#+sbcl (sb-kernel:%simple-fun-arglist (symbol-function thing))
#+clisp (ext:arglist (symbol-function thing))
#-(or excl cmu sbcl clisp) "( ??? )"))
(when arglist
(clim:present arglist
(clim:presentation-type-of arglist)
:stream stream)))
(terpri))
(format stream " it has a property list of ~S~%" (symbol-plist thing)))
(defmethod describe-object ((thing number) stream)
(clim:present thing (clim:presentation-type-of thing)
:stream stream)
(format stream " is a number of type ")
(clim:present (type-of thing) (clim:presentation-type-of (type-of thing))
:stream stream)
(terpri stream))
(defmethod describe-object ((thing string) stream)
(clim:present thing (clim:presentation-type-of thing)
:stream stream)
(format stream " is of type ")
(clim:present (type-of thing) (clim:presentation-type-of (type-of thing))
:stream stream)
(format stream " with a length of ")
(clim:present (length thing) 'clim:integer
:stream stream)
(terpri stream))
(defmethod describe-object ((thing package) stream)
(clim:present thing (clim:presentation-type-of thing)
:stream stream)
(format stream " is a package named ")
(clim:present (package-name thing) (clim:presentation-type-of (package-name thing))
:stream stream)
(terpri stream)
(format stream " it has the nicknames of ")
(clim:present (package-nicknames thing) 'clim:expression
:stream stream)
(terpri stream)
(format stream " it uses these packages: ")
(clim:present (package-use-list thing) 'clim:expression
:stream stream)
(terpri stream)
(format stream " it is used by the packages: ")
(clim:present (package-used-by-list thing) 'clim:expression
:stream stream)
(terpri stream))
(labels ((present-instance-slots-text (thing stream)
(let* ((slots (clim-mop:class-slots (class-of thing)))
(width (loop for slot in slots
maximizing (length (symbol-name (clim-mop:slot-definition-name slot))))))
(loop for slot in slots
do (cond
((slot-boundp thing (clim-mop:slot-definition-name slot))
(format stream " ~v@A: " width
(clim-mop:slot-definition-name slot))
(clim:present (slot-value thing (clim-mop:slot-definition-name slot))
'clim:expression
:stream stream)
(terpri stream))
(t
(format stream " ~v@A: <unbound>~%" width
(clim-mop:slot-definition-name slot)))))))
(present-instance-slots-clim (thing stream)
(let ((slots (clim-mop:class-slots (class-of thing))))
(clim:formatting-table (stream)
(dolist (slot slots)
(clim:formatting-row (stream)
(clim:formatting-cell (stream :align-x :right)
(clim:present (clim-mop:slot-definition-name slot)
'clim:symbol
:stream stream)
(write-char #\: stream))
(clim:formatting-cell (stream)
(if (slot-boundp thing (clim-mop:slot-definition-name slot))
(clim:present (slot-value thing (clim-mop:slot-definition-name slot))
'clim:expression
:stream stream)
(format stream "<unbound>"))))))))
(describe-instance (thing a-what stream)
(clim:present thing (clim:presentation-type-of thing)
:stream stream)
(format stream " is ~A of type " a-what)
(clim:present (type-of thing) (clim:presentation-type-of (type-of thing))
:stream stream)
(terpri stream)
(format stream " it has the following slots:~%")
(if (typep stream 'clim:output-recording-stream)
(present-instance-slots-clim thing stream)
(present-instance-slots-text thing stream))))
(defmethod describe-object ((thing standard-object) stream)
(describe-instance thing "an instance" stream))
(defmethod describe-object ((thing structure-object) stream)
(describe-instance thing "a structure" stream)))