"

 COPYRIGHT (c) 1993 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.

"

"{ Package: 'stx:libbasic3' }"

Change subclass:#ClassChange

	instanceVariableNames:'className package'

	classVariableNames:''

	poolDictionaries:''

	category:'System-Changes'

!

!ClassChange class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 1993 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.

"

!

documentation

"

    Abstract superclass for class related changes

    They are typically held in a ChangeSet.

    [author:]

        Claus Gittinger

"

! !

!ClassChange class methodsFor:'instance creation'!

class:aClass

    ^ self new class:aClass

    "Created: 3.12.1995 / 14:01:32 / cg"

!

class:aClass source:source

    ^ self new class:aClass source:source

    "Created: 3.12.1995 / 14:01:32 / cg"

! !

!ClassChange methodsFor:'accessing'!

changeClass

    "the class of the change (nil if not present)"

    |cls|

    cls := Smalltalk classNamed:(self className).

"/    |className ns cls|

"/

"/    className := self className.

"/    className isNil ifTrue:[^ nil].

"/

"/    ns := (Class nameSpaceQuerySignal query) ? Smalltalk.

"/    ns isNameSpace ifFalse:[

"/        ns := Smalltalk

"/    ].

"/

"/    cls := ns classNamed:className.

"/    cls isNil ifTrue:[

"/        ns ~~ Smalltalk ifTrue:[

"/            cls := Smalltalk classNamed:className

"/        ].

"/    ].

    ^ cls

!

changeClass:aClass

    "set the class of the change"

    className := aClass name.

!

class:aClass

    "set the class of the change"

    className := aClass name.

    "Created: 3.12.1995 / 14:01:45 / cg"

    "Modified: 15.7.1996 / 09:28:26 / cg"

!

class:aClass source:newSource

    "set both class and source of the change"

    self className:(aClass name) source:newSource

!

classBaseName 

    "return the className of the change"

    ^ self cutNameSpaceOf:className

    "Modified: 15.7.1996 / 09:28:35 / cg"

!

className:aString 

    "set the className of the change"

    className := aString

    "Modified: / 15.7.1996 / 09:28:35 / cg"

    "Created: / 16.2.1998 / 13:05:36 / cg"

!

className:newClassName source:newSource

    "set both className and source of the change"

    className := newClassName.

    source := newSource.

    "Created: 3.12.1995 / 14:01:45 / cg"

    "Modified: 15.7.1996 / 09:28:26 / cg"

!

classNameWithoutNamespace

    "return the className of the change"

    ^ self cutNameSpaceOf:className

    "Modified: 15.7.1996 / 09:28:35 / cg"

!

package

    "return the value of the instance variable 'package' (automatically generated)"

    ^ package

!

package:something

    "set the value of the instance variable 'package' (automatically generated)"

    package := something.

! !

!ClassChange methodsFor:'applying'!

apply

    "apply the change"

    Parser evaluate:(self source)

"/    |ns|

"/

"/    ns := Class nameSpaceQuerySignal isHandled 

"/            ifTrue:[ Class nameSpaceQuerySignal query ]

"/            ifFalse:[ self nameSpace ].

"/

"/    Class nameSpaceQuerySignal answer:ns do:[

"/        Parser evaluate:(self source)

"/    ].

!

className

    |ns|

    "/ used to be ^ className;

    "/

    "/ now include a translation from vw namespace to stx nameSpace

    ns := self nameSpaceName.

    (ns isNil or:[ns = 'Smalltalk']) ifTrue:[^ className].

    ^ ns , '::' , (self classNameWithoutNamespace)

!

fullClassName

    |ns|

    "/ used to be ^ className;

    "/

    "/ now include a translation from vw namespace to stx nameSpace

    ns := self nameSpaceName.

    (ns isNil or:[ns = 'Smalltalk']) ifTrue:[^ self className].

    ^ ns , '::' , self className

!

nameSpace

    |nsName nameSpace|

    (nsName := self nameSpaceName) notNil ifTrue:[

        ^ NameSpace name:nsName.

    ].

    ^ Smalltalk

!

nameSpaceName

    |ns cnm idx|

    (className includes:$:) ifTrue:[

        "/ in a namespace

        ^ className upTo:$:.

    ].

    (idx := className indexOf:$.) ~~ 0 ifTrue:[

        "/ in a namespace

        ns := className copyTo:(idx - 1).

        cnm := className copyFrom:(idx + 1).

        "cheat: VW namespaces"

        ^ self nameSpaceForVWNamespace:ns class:cnm ifAbsent:ns

    ].

    ^ nil

! !

!ClassChange methodsFor:'printing & storing'!

printOn:aStream

    "append a user printed representation of the receiver to aStream.

     The format is suitable for a human - not meant to be read back."

    source isNil ifTrue:[

        aStream nextPutAll:'an empty change'.

        ^ self

    ].

! !

!ClassChange methodsFor:'queries'!

cutNameSpaceOf:aString

    |dotIndex colonIndex|

    aString notNil ifTrue:[

        dotIndex := aString indexOf:$..

        dotIndex ~~ 0 ifTrue:[

            ^ aString copyFrom:dotIndex+1

        ].

        colonIndex := aString indexOf:$:.

        colonIndex ~~ 0 ifTrue:[

            ^ aString copyFrom:colonIndex+2

        ].

    ].

    ^ aString

!

isClassChange

    ^ true

!

nameSpaceForVWNamespace:ns class:className ifAbsent:default

    "map the namespace for a given class"

    ns = 'Core' ifTrue:[^ 'Smalltalk'].

    ns = 'Kernel' ifTrue:[^ 'Smalltalk'].

    ns = 'Graphics' ifTrue:[^ 'Smalltalk'].

    ns = 'OS' ifTrue:[^ 'Smalltalk'].

    ns = 'Smalltalk' ifTrue:[^ 'Smalltalk'].

    ns = 'UI' ifTrue:[^ 'Smalltalk'].

    ^ default value

! !

!ClassChange class methodsFor:'documentation'!

version

! !