"{ Package: 'stx:goodies/monticello' }"

MCDefinition subclass:#MCMethodDefinition

	instanceVariableNames:'classIsMeta source category selector className timeStamp

	classVariableNames:'Definitions'

	poolDictionaries:''

	category:'SCM-Monticello-Modeling'

!

!MCMethodDefinition class methodsFor:'as yet unclassified'!

cachedDefinitions

        Definitions ifNil: [Definitions := WeakIdentityDictionary new.  WeakArray addDependent: Definitions].

        ^ Definitions

    "Modified: / 26-08-2009 / 12:20:45 / Jaroslav Havlin <havlij6@fel.cvut.cz>"

!

className: classString

classIsMeta: metaBoolean

selector: selectorString

category: catString

timeStamp: timeString

source: sourceString

	^ self instanceLike:

		(self new initializeWithClassName: classString

					classIsMeta: metaBoolean

					selector: selectorString

					category: catString

					timeStamp: timeString

					source: sourceString)

!

className: classString

selector: selectorString

category: catString

timeStamp: timeString

source: sourceString

	^ self	className: classString

			classIsMeta: false

			selector: selectorString

			category: catString

			timeStamp: timeString

			source: sourceString

!

forMethodReference: aMethodReference

	| definition |

	definition := self cachedDefinitions at: aMethodReference compiledMethod ifAbsent: [].

	(definition isNil

		or: [definition selector ~= aMethodReference methodSymbol]

		or: [definition className ~= aMethodReference classSymbol]

		or: [definition classIsMeta ~= aMethodReference classIsMeta]

		or: [definition category ~= aMethodReference category])

			ifTrue: [definition := self 

						className: aMethodReference classSymbol

						classIsMeta: aMethodReference classIsMeta

						selector: aMethodReference methodSymbol

						category: aMethodReference category

						timeStamp: aMethodReference timeStamp

						source: aMethodReference source.

					self cachedDefinitions at: aMethodReference compiledMethod put: definition].

	^ definition

!

initialize

    "

        Smalltalk addToShutDownList: self

    "

    "Modified: / 13-10-2010 / 14:12:35 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

shutDown

	WeakArray removeWeakDependent: Definitions.

	Definitions := nil.

! !

!MCMethodDefinition methodsFor:'accessing'!

actualClass

    ^ Smalltalk 

        at:(self installedClassName ? className) asSymbol

        ifPresent: [:class | 

            classIsMeta 

                ifTrue: [class theMetaclass "classSide"] 

                ifFalse: [class]

        ]

    "Modified: / 07-09-2011 / 15:23:45 / cg"

    "Modified: / 12-08-2013 / 01:34:44 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

category

	^ category

!

category:something

    category := something.

!

classIsMeta

	^ classIsMeta

!

className

	^className

!

description

	^ Array	

		with: className

		with: selector

		with: classIsMeta

!

fullTimeStamp

	^Timestamp fromMethodTimeStamp: timeStamp

!

installedClassName

    | installedClassName |

    installedClassName :=  self objectAttributeAt: #installedClassName.

    ^ installedClassName ? className

    "Created: / 07-09-2011 / 13:36:37 / cg"

    "Modified: / 12-08-2013 / 01:37:20 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

installedClassName:aString

    self objectAttributeAt: #installedClassName put: aString.

    "Modified: / 12-08-2013 / 01:37:45 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

selector

	^selector

!

source

	^ source

!

timeStamp

	^ timeStamp

! !

!MCMethodDefinition methodsFor:'annotations'!

printAnnotations: requests on: aStream

	"Add a string for an annotation pane, trying to fulfill the annotation requests.

	These might include anything that

		Preferences defaultAnnotationRequests 

	might return. Which includes anything in

		Preferences annotationInfo

	To edit these, use:"

	"Preferences editAnnotations"

	requests do: [ :aRequest |

		aRequest == #timeStamp ifTrue: [ aStream nextPutAll: self timeStamp ].

		aRequest == #messageCategory ifTrue: [ aStream nextPutAll: self category ].

		aRequest == #requirements ifTrue: [

			self requirements do: [ :req |

				aStream nextPutAll: req ] separatedBy: [ aStream space ]].

	] separatedBy: [ aStream space ].

! !

!MCMethodDefinition methodsFor:'comparing'!

= aDefinition

        ^(super = aDefinition)

                and: [aDefinition source = self source

                and: [aDefinition category = self category

                "and: [aDefinition timeStamp = self timeStamp]"]]

    "Modified: / 18-08-2009 / 10:18:43 / Jan Vrany <vranyj1@fel.cvut.cz>"

    "Modified: / 14-09-2010 / 19:03:27 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

hash

	| hash |

	hash := String stringHash: classIsMeta asString initialHash: 0.

	hash := String stringHash: source initialHash: hash.

	hash := String stringHash: category initialHash: hash.

	hash := String stringHash: className initialHash: hash.

	^ hash

!

requirements

	^ Array with: className

!

sortKey

	^ self className, '.', (self classIsMeta ifTrue: ['meta'] ifFalse: ['nonmeta']), '.', self selector

! !

!MCMethodDefinition methodsFor:'converting'!

asChange

    ^MethodDefinitionChange new

        mcDefinition: self;

        className: className , (classIsMeta ifTrue:[' class'] ifFalse:['']);

        selector: selector;

        source: source asStringWithNativeLineEndings;

        category: category;

        yourself

    "Created: / 13-10-2010 / 17:17:37 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 08-11-2010 / 17:56:56 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!MCMethodDefinition methodsFor:'installing'!

isExtensionMethod

	^ category beginsWith: '*'

!

isOverrideMethod

	"this oughta check the package"

	^ self isExtensionMethod and: [category endsWith: '-override']

!

load

    | env package oldMethod newMethod actualClass|

    env := MCStXNamespaceQuery query ? Smalltalk.

    (env ~~ Smalltalk) ifTrue:[

        self installedClassName:(env name , '::' , className) asSymbol

    ].

    package := MCStXPackageQuery query.

    actualClass := self actualClass.

    actualClass isNil ifTrue:[

        MCCannotLoadMethodError 

            raiseRequestWith:self

            errorString:('missing class: %1' bindWith:className).

        ^ self "/ proceeded

    ].

    oldMethod := actualClass compiledMethodAt: self selector.

    (oldMethod notNil and:[oldMethod package ~= package])

        ifTrue:[Class methodRedefinitionNotification

                    raiseRequestWith: (oldMethod -> self)].

    newMethod := actualClass

                compile: source asStringWithNativeLineEndings

                classified: category

                withStamp: timeStamp

                "notifying: (SyntaxError new category: category)".

    newMethod package: package

    "Modified: / 11-09-2012 / 09:54:19 / cg"

    "Modified: / 12-08-2013 / 01:34:37 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

postloadOver: aDefinition

	super postloadOver: aDefinition.

	(self isInitializer

		and: [ self actualClass isTrait not ]

		and: [ aDefinition isNil or: [ self source ~= aDefinition source ] ]) ifTrue: [

			self actualClass theNonMetaClass initialize ]

!

scanForPreviousVersion

	| position prevPos prevFileIndex preamble tokens sourceFilesCopy stamp method file methodCategory |

	method := self actualClass compiledMethodAt: selector ifAbsent: [^ nil].

	position := method filePosition.

	sourceFilesCopy := SourceFiles collect:

		[:x | x isNil ifTrue: [ nil ]

				ifFalse: [x readOnlyCopy]].

	[method fileIndex == 0 ifTrue: [^ nil].

	file := sourceFilesCopy at: method fileIndex.

	[position notNil & file notNil]

		whileTrue:

		[file position: (0 max: position-150).  "Skip back to before the preamble"

		[file position < (position-1)]  "then pick it up from the front"

			whileTrue: [preamble := file nextChunk].

		"Preamble is likely a linked method preamble, if we're in

			a changes file (not the sources file).  Try to parse it

			for prior source position and file index"

		prevPos := nil.

		stamp := ''.

		(preamble findString: 'methodsFor:' startingAt: 1) > 0

			ifTrue: [tokens := Scanner new scanTokens: preamble]

			ifFalse: [tokens := Array new  "ie cant be back ref"].

		((tokens size between: 7 and: 8)

			and: [(tokens at: tokens size-5) = #methodsFor:])

			ifTrue:

				[(tokens at: tokens size-3) = #stamp:

				ifTrue: ["New format gives change stamp and unified prior pointer"

						stamp := tokens at: tokens size-2.

						prevPos := tokens last.

						prevFileIndex := sourceFilesCopy fileIndexFromSourcePointer: prevPos.

						prevPos := sourceFilesCopy filePositionFromSourcePointer: prevPos]

				ifFalse: ["Old format gives no stamp; prior pointer in two parts"

						prevPos := tokens at: tokens size-2.

						prevFileIndex := tokens last].

				(prevPos = 0 or: [prevFileIndex = 0]) ifTrue: [prevPos := nil]].

		((tokens size between: 5 and: 6)

			and: [(tokens at: tokens size-3) = #methodsFor:])

			ifTrue:

				[(tokens at: tokens size-1) = #stamp:

				ifTrue: ["New format gives change stamp and unified prior pointer"

						stamp := tokens at: tokens size]].

		methodCategory := tokens after: #methodsFor: ifAbsent: ['as yet unclassifed'].

		methodCategory = category ifFalse:

			[methodCategory = (Smalltalk 

									at: #Categorizer 

									ifAbsent: [Smalltalk at: #ClassOrganizer]) 

										default ifTrue: [methodCategory := methodCategory, ' '].

			^ ChangeRecord new file: file position: position type: #method

						class: className category: methodCategory meta: classIsMeta stamp: stamp].

		position := prevPos.

		prevPos notNil ifTrue:

			[file := sourceFilesCopy at: prevFileIndex]].

		^ nil]

			ensure: [sourceFilesCopy do: [:x | x notNil ifTrue: [x close]]]

!

unload

        | previousVersion class |

        (class := self actualClass) ifNotNil: [class removeSelector: selector].

        ^self.

        "Original stuff"

        self todo:'cg: why was the code below removed? see browsers previous versions code'.

        self isOverrideMethod ifTrue: [previousVersion := self scanForPreviousVersion].

        previousVersion

                ifNil: [(class := self actualClass) ifNotNil: [class removeSelector: selector]]

                ifNotNil: [previousVersion fileIn]

    "Modified: / 11-09-2010 / 18:44:56 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 07-09-2011 / 13:39:38 / cg"

! !

!MCMethodDefinition methodsFor:'printing'!

fullClassName

	"Using #class selector for classes for backwards compatibility"

	^ self classIsMeta

		ifFalse: [self className]

		ifTrue: [

			(self actualClass isNil or: [ self actualClass isTrait ])

				ifFalse: [self className, ' class']

				ifTrue: [self className, ' classSide']]

!

summary

	^ self fullClassName , '>>' , selector

! !

!MCMethodDefinition methodsFor:'private'!

existingMethodOrNil

    | actualClass |

    actualClass := self actualClass.

    ^actualClass 

        ifNil:[nil]

        ifNotNil: [actualClass compiledMethodAt:self selector]

    "Modified: / 08-11-2010 / 17:41:10 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!MCMethodDefinition methodsFor:'serializing'!

initializeWithClassName: classString

classIsMeta: metaBoolean

selector: selectorString

category: catString

timeStamp: timeString

source: sourceString 

        className := classString asSymbol.

        selector := selectorString asSymbol.

        category := catString asSymbol.

        timeStamp := timeString.

        classIsMeta := metaBoolean.

        source := sourceString asStringWithSqueakLineEndings.

    "Modified: / 12-09-2010 / 16:02:05 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!MCMethodDefinition methodsFor:'testing'!

isCodeDefinition

	^ true

!

isInitializer

	^ selector = #initialize and: [classIsMeta]

!

isMethodDefinition

	^true

!

isOverrideDefinition

    | oldMethod |

    oldMethod := self existingMethodOrNil.

    ^oldMethod 

        ifNil:[false]

        ifNotNil:[oldMethod package ~= MCStXPackageQuery query]

    "Created: / 08-11-2010 / 17:29:36 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!MCMethodDefinition methodsFor:'visiting'!

accept: aVisitor

	^ aVisitor visitMethodDefinition: self

! !

!MCMethodDefinition class methodsFor:'documentation'!

version

!

version_CVS

!

version_SVN

! !

MCMethodDefinition initialize!