"

 COPYRIGHT (c) 1989 by Claus Gittinger

	      All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

Object subclass:#MiniInspector

       instanceVariableNames:'inspectedObject'

       classVariableNames:   ''

       poolDictionaries:''

       category:'System-Debugging-Support'

!

!MiniInspector class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 1989 by Claus Gittinger

	      All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

!

version

    ^ '$Header: /cvs/stx/stx/libbasic/MiniInspector.st,v 1.11 1995-11-11 15:24:31 cg Exp $'

!

documentation

"

    a primitive (non graphical) inspector for use on systems without

    graphics or when the real inspector dies.

"

! !

!MiniInspector class methodsFor:'instance creation'!

openOn:anObject

    |anInspector|

    anInspector := (self new) initializeFor:anObject.

    anInspector enter

! !

!MiniInspector methodsFor:'private'!

initializeFor:anObject

    inspectedObject := anObject.

    ^self

!

enter

    self commandLoop.

    ^ nil

!

commandLoop

    |cmd done valid|

    'Inspector:' printNewline.

    ' ' printNewline.

    done := false.

    [done] whileFalse:[

	valid := false.

	cmd := self getCommand.

	(cmd == $0) ifTrue:[

	    valid := true.

	    self inspectInstvar:0 of:inspectedObject

	].

	(cmd == $1) ifTrue:[

	    valid := true.

	    self inspectInstvar:1 of:inspectedObject

	].

	(cmd == $2) ifTrue:[

	    valid := true.

	    self inspectInstvar:2 of:inspectedObject

	].

	(cmd == $3) ifTrue:[

	    valid := true.

	    self inspectInstvar:3 of:inspectedObject

	].

	(cmd == $i) ifTrue:[

	    valid := true.

	    self printInstVarsOf:inspectedObject

	].

	(cmd == $p) ifTrue:[

	    valid := true.

	    inspectedObject printNewline

	].

	(cmd == $q) ifTrue:[valid := true. done := true ].

	valid ifFalse: [

	    'valid commands:

   (i)nstvars

   (p)rint

   (1-9) inspect instvar

   (q)uit'       errorPrintNewline

	]

    ].

    ^ cmd

!

getCommand

    |cmd c|

    'inspector> ' print.

    cmd := Character fromUser.

    c := cmd.

    [ c isEndOfLineCharacter ] whileFalse: [

	c := Character fromUser

    ].

    ^ cmd

!

printInstVarsOf:anObject

    |n|

    n := anObject class instSize.

    'number of instvars: ' print. n printNewline.

    1 to:n do:[:i |

	'  ' print. i print. ': ' print.

	(anObject instVarAt:i) printNewline

    ]

!

inspectInstvar:which of:anObject

    which > (anObject class instSize) ifTrue:[

	'invalid instvar' printNewline

    ] ifFalse: [

	(anObject instVarAt:which) inspect

    ]

! !