"

 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.

"

"{ Package: 'stx:libbasic' }"

Object subclass:#ClassCategoryReader

	instanceVariableNames:'myClass myCategory privacy ignore primSpec'

	classVariableNames:'KeepSource SourceMode SkipUnchangedMethods'

	poolDictionaries:''

	category:'Kernel-Support'

!

!ClassCategoryReader 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.

"

!

documentation

"

    a helper class for fileIn - keeps track of class and category to filein for.

    Instances of this are created by the #methodsFor: methods in Class, to

    read the next chunk(s) from a stream.

    ClassCategoryReaders allow different ways of keeping the sourceCode of its

    loaded code. This is controlled by the SourceMode class variable which may be:

        #discard         - forget the source code; no browsing/recompilation is possible

        #keep            - keep the source code as a string.

                           any saved image will later be fully independent of any

                           source files.

        #reference       - keep a reference to the loaded files basename

                           In order to be browsable, the original sourcefile should be

                           found along the sourcePath 

                           (i.e. typically a link in the source directory should be present)

        #absReference    - keep a reference to the loaded files absolute pathname

                           but only if the file ends with .st.

                           (this is ok in multiUser configurations, where all sourcefiles are mounted

                           on a common path; typically automounted systems)

        #forceAbsReference 

                         - like above, but also do it for files not ending with .st.

                           Must be used with care - NEVER ever reference sources from the changes

                           file, because the changesBrowser does not adjust methods sources

                           when it compresses or removes changes.

        #sourceReference - append source to the `st.src' file,

                           and keep a reference to that file.

                           if the image is later moved to another location,

                           this file should be moved along with it.

    [author:]

        Claus Gittinger

    [see also:]

        Class PositionableStream

"

! !

!ClassCategoryReader class methodsFor:'initialization'!

initialize

    KeepSource := true.

    SourceMode := #keep.

    SkipUnchangedMethods := true.

    "

     ClassCategoryReader initialize

    "

    "Modified: 14.2.1997 / 18:26:52 / cg"

! !

!ClassCategoryReader class methodsFor:'instance creation'!

class:aClass category:aCategory

    "return a new ClassCategoryReader to read methods for aClass with

     methodCategory aCategory"

    ^ self new class:aClass category:aCategory

!

class:aClass primitiveSpec:which

    "return a ClassCategoryReader to read a primitiveSpec chunk"

    ^ self new class:aClass primitiveSpec:which

! !

!ClassCategoryReader class methodsFor:'defaults'!

keepSource

    ^ KeepSource

    "Created: 9.9.1995 / 15:22:27 / claus"

!

keepSource:aBoolean

    KeepSource := aBoolean.

    SourceMode := (aBoolean ifTrue:[#keep] ifFalse:[#reference])

    "Created: 9.9.1995 / 15:22:26 / claus"

    "Modified: 9.2.1996 / 17:23:04 / cg"

!

skipUnchangedMethods

    "return true, if the default for unchanged methods is to skip them.

     The default is true."

    ^ SkipUnchangedMethods

    "Created: 14.2.1997 / 18:27:49 / cg"

    "Modified: 14.2.1997 / 18:28:13 / cg"

!

skipUnchangedMethods:aBoolean

    "return true, if the default for unchanged methods is to skip them.

     The default is true. Can be temporarily changed to false, if

     a forced fileIn is required."

    SkipUnchangedMethods := aBoolean

    "Created: 14.2.1997 / 18:27:43 / cg"

    "Modified: 14.2.1997 / 18:28:42 / cg"

!

sourceMode 

    "return the sourceMode, which controls how sources are to be handled.

     Read #documentation for more info"

    ^ SourceMode

    "Created: 9.2.1996 / 17:22:58 / cg"

!

sourceMode:aSymbol 

    "set the sourceMode, which controls how sources are to be handled.

     Read #documentation for more info"

    SourceMode := aSymbol

    "Created: 9.2.1996 / 17:23:00 / cg"

! !

!ClassCategoryReader methodsFor:'fileIn'!

fileInFrom:aStream

    "read method-chunks from the input stream, aStream; compile them

     and add the methods to the class defined by the class-instance var"

    ^ self 

        fileInFrom:aStream 

        notifying:nil 

        passChunk:false

        single:false

        silent:nil

    "Modified: / 17.5.1998 / 19:58:33 / cg"

!

fileInFrom:aStream notifying:requestor passChunk:passChunk

    "read method-chunks from the input stream, aStream; compile them

     and add the methods to the class defined by the class-instance var;

     errors and notifications are passed to requestor.

     If passChunk is true, chunks are given to the requestor,

     via a #source: message, allowing it to open a view showing any

     arronous source code."

    ^ self

        fileInFrom:aStream 

        notifying:requestor 

        passChunk:passChunk 

        single:false

        silent:nil

    "Modified: / 17.5.1998 / 19:58:15 / cg"

!

fileInFrom:aStream notifying:requestor passChunk:passChunk single:oneChunkOnly

    "read method-chunks from the input stream, aStream; compile them

     and add the methods to the class defined by the class-instance var;

     errors and notifications are passed to requestor.

     If passChunk is true, chunks are given to the requestor,

     via a #source: message, allowing it to open a view showing any

     erronous source code.

     If oneChunkOnly is true, the fileIn is finished after the first chunk."

    ^ self

        fileInFrom:aStream 

        notifying:requestor 

        passChunk:passChunk 

        single:oneChunkOnly 

        silent:nil

    "Modified: / 17.5.1998 / 19:58:05 / cg"

!

fileInFrom:aStream notifying:requestor passChunk:passChunk single:oneChunkOnly silent:beSilent

    "read method-chunks from the input stream, aStream; compile them

     and add the methods to the class defined by the class-instance var;

     errors and notifications are passed to requestor.

     If passChunk is true, chunks are given to the requestor,

     via a #source: message, allowing it to open a view showing any

     erronous source code.

     If oneChunkOnly is true, the fileIn is finished after the first chunk.

     The beSilent argument controls output to the transcript, if its true or

     false. If its nil, output is controlled by the Smalltalk>>silenLoading setting."

    |aString done method compiler canMakeSourceRef sourceFile pos nm src s silent|

    silent == true ifFalse:[

        myClass isNil ifTrue:[

            nm := '** UndefinedClass **'

        ] ifFalse:[

            nm := myClass name

        ].

        Transcript show:'  '; show:nm; show:' -> '; show:myCategory.

        ignore ifTrue:[

            Transcript show:' (** ignored **)'.

        ] ifFalse:[

            privacy notNil ifTrue:[

                Transcript show:' (** '; show:privacy; show:' **)'

            ]

        ].

        Transcript cr.

    ].

    canMakeSourceRef := false.

    "/

    "/ SourceMode controls if

    "/ the sourceString should be kept or

    "/ a reference to the fileStream should be placed into the

    "/ method instead.

    "/

    ((SourceMode ~~ #keep) 

    and:[SourceMode ~~ #discard]) ifTrue:[

        aStream isFileStream ifTrue:[

            sourceFile := aStream pathName.

            "/

            "/ only do it, if the sourceFiles name

            "/ ends with '.st'

            "/ this prevents methods from referencing the changes file.

            "/

            ((SourceMode == #forceAbsReference)

            or:[sourceFile asFilename hasSuffix:'st']) ifTrue:[

                canMakeSourceRef := true.

                (SourceMode ~~ #absReference

                and:[SourceMode ~~ #forceAbsReference]) ifTrue:[

                    SourceMode == #sourceReference ifTrue:[

                        sourceFile := 'st.src'.

                    ] ifFalse:[

                        sourceFile := aStream pathName asFilename baseName

                    ]

                ]

            ]

        ]

    ].

    done := false.

    [done] whileFalse:[

        done := aStream atEnd.

        done ifFalse:[

            canMakeSourceRef ifTrue:[

                pos := aStream position

            ].

            aString := aStream nextChunk.

            done := aString size == 0.

            done ifFalse:[

                primSpec notNil ifTrue:[

                    ignore ifFalse:[

                        myClass perform:primSpec with:aString.

                        "

                         ignore rest

                        "

                        ignore := true

                    ]

                ] ifFalse:[

                    passChunk ifTrue:[

                        requestor source:aString

                    ].

                    compiler := myClass compilerClass.

                    "/

                    "/ kludge - for now;

                    "/ have to make ST/X's compiler protocol be compatible to ST-80's

                    "/ for other compilers to work ... (TGEN for example)

                    "/

                    (compiler respondsTo:#compile:forClass:inCategory:notifying:install:skipIfSame:)

                    ifTrue:[

                        "/ ST/X's compiler

                        method :=compiler

                                     compile:aString

                                     forClass:myClass

                                     inCategory:myCategory

                                     notifying:requestor

                                     install:true

                                     skipIfSame:SkipUnchangedMethods.

                        (method notNil and:[method ~~ #Error]) ifTrue:[

                            canMakeSourceRef ifTrue:[

                                (src := method getSource) = aString ifTrue:[

                                    "/ it was not corrected ...

                                    SourceMode == #sourceReference ifTrue:[

                                        s := sourceFile asFilename appendingWriteStream.

                                        s setToEnd.     

                                        pos := s position.

                                        s nextChunkPut:src.

                                        s close.

                                    ].

                                    method sourceFilename:sourceFile position:pos 

                                ]

                            ] ifFalse:[

                                SourceMode == #discard ifTrue:[

                                    method sourceFilename:nil position:nil

                                ]

                            ]

                        ]

                    ] ifFalse:[

                        "/ some generated (TGEN) compiler

                        method := compiler new

                                      compile:aString 

                                      in:myClass 

                                      notifying:requestor 

                                      ifFail:nil

                    ].

                    ignore ifTrue:[

                        method setPrivacy:#ignore

                    ] ifFalse:[

                        privacy notNil ifTrue:[

                            method setPrivacy:privacy

                        ]

                    ]

                ]

            ].

            oneChunkOnly ifTrue:[done := true].

        ]

    ]

    "Modified: / 9.9.1995 / 15:29:08 / claus"

    "Modified: / 23.1.1998 / 15:25:01 / stefan"

    "Created: / 17.5.1998 / 19:56:32 / cg"

    "Modified: / 29.10.1998 / 21:34:59 / cg"

!

fileInFrom:aStream silent:beSilent

    "read method-chunks from the input stream, aStream; compile them

     and add the methods to the class defined by the class-instance var.

     The beSilent argument controls if a message is to be sent to the Transcript."

    ^ self 

        fileInFrom:aStream 

        notifying:nil 

        passChunk:false

        single:false

        silent:beSilent

    "Created: / 17.5.1998 / 19:59:08 / cg"

    "Modified: / 17.5.1998 / 19:59:57 / cg"

! !

!ClassCategoryReader methodsFor:'private'!

class:aClass category:aCategory

    "set the instance variables"

    myClass := aClass.

    "/ ensure that the class is loaded.

    myClass autoload.

    myCategory := aCategory.

    ignore := false

!

class:aClass primitiveSpec:which

    "set the instance variables"

    myClass := aClass.

    "/ ensure that the class is loaded.

    myClass autoload.

    primSpec := which.

    ignore := false

! !

!ClassCategoryReader methodsFor:'special'!

ignoredProtocol 

    ignore := true

    "Created: 10.2.1996 / 12:54:15 / cg"

!

privateProtocol

    privacy := #private

!

protectedProtocol

    privacy := #protected

! !

!ClassCategoryReader class methodsFor:'documentation'!

version

! !

ClassCategoryReader initialize!