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

"{ NameSpace: SmallSense }"

Object subclass:#Manager

	instanceVariableNames:'classes accessLock updater seqno'

	classVariableNames:'Instance'

	poolDictionaries:''

	category:'SmallSense-Smalltalk-Types-Info'

!

!Manager class methodsFor:'instance creation'!

flush

    "flushes the cached singleton"

    Instance := nil

    "

     self flushSingleton

    "

    "Created: / 16-12-2011 / 01:37:56 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

flushSingleton

    "flushes the cached singleton"

    Instance := nil

    "

     self flushSingleton

    "

!

instance

    "returns a singleton"

    Instance isNil ifTrue:[

        Instance := self basicNew initialize.

    ].

    ^ Instance.

    "Created: / 27-11-2011 / 15:30:22 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

new

    "returns a singleton"

    ^ self instance.

    "Modified: / 27-11-2011 / 15:30:31 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!Manager methodsFor:'accessing'!

infoForClass: class

    | info |

    accessLock critical:[

        info := self basicInfoForClass: class.

    ].

    ^info

    "Created: / 27-11-2011 / 16:15:00 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

infoForClassOrNil: class

    ^classes at: class name ifAbsent: nil

    "Created: / 27-11-2011 / 17:15:44 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!Manager methodsFor:'accessing-private'!

basicInfoForClass: class

    class isNil ifTrue:[^nil].

    ^classes at: class name ifAbsentPut:[

        ClassInfo new

            setManager: self

            className: class name

    ].

    "Created: / 27-11-2011 / 16:47:58 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!Manager methodsFor:'change & update'!

update:what with:param from:sender

    "Invoked when an object that I depend upon sends a change notification."

    UserPreferences current smallSenseBackgroundTypingEnabled ifFalse:[ ^ self ].

    sender ~~ Smalltalk ifTrue:[

        super update:what with:param from:sender.

        ^self.

    ].

    what == #methodInClass ifTrue:[

        "/ If this is anonymous class, do not bother...        

        | nm |

        nm := param first name.

        (nm isSymbol and:[ Smalltalk includesKey: nm ]) ifTrue:[

            self updateInfoForMethod: (param first >> param second).

        ].

        ^self.

    ].

"/    Transcript show: 'SmallSense: Smalltalk changed: ', what , ' with: ', param printString.

    "Modified: / 18-03-2014 / 12:27:19 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!Manager methodsFor:'initialization'!

initialize

    "Invoked when a new instance is created."

    classes := Dictionary new.

    accessLock := Semaphore forMutualExclusion.

    updater := BackgroundQueueProcessingJob 

                    named: 'SmallSense background updater' 

                    on: [:classOrMethod|self delayedUpdateInfoForClassOrMethod: classOrMethod].

    updater priority: Processor userBackgroundPriority - 1.

    UserPreferences current smallSenseEnabled ifTrue:[

        Smalltalk addDependent: self.

    ].

    seqno := 0

    "Modified: / 22-10-2013 / 10:56:51 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!Manager methodsFor:'updating'!

updateInfoForClass: class

    | info |

    class programmingLanguage isSmalltalk ifFalse:[ ^ self ].

    info := self infoForClassOrNil: class.

    (info isNil or:[(info seqno ? 0) < (seqno - 100)]) ifTrue:[

        updater add: class

    ].

    seqno := seqno == SmallInteger maxVal ifTrue: [1] ifFalse:[seqno + 1]

    "Created: / 27-11-2011 / 17:46:57 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 22-10-2013 / 11:38:57 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

updateInfoForMethod: method

    | info |

    method programmingLanguage isSmalltalk ifFalse:[ ^ self ].

    info := self basicInfoForClass: method mclass.

    info isNil ifTrue:[

        updater add: method mclass

    ] ifFalse:[

        updater add: method

    ]

    "Created: / 28-11-2011 / 19:30:29 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!Manager methodsFor:'updating-delayed'!

delayedUpdateInfoForClass: class

    | superclass info instVarNames instVarTypes probe nprobed |

    superclass := class superclass.

    superclass notNil ifTrue:[self updateInfoForClass: superclass].

    info := self infoForClass: class.

    info seqno: seqno.

    instVarNames := class allInstVarNames.

    instVarTypes := instVarNames collect: [:instvar | info infoForInstvar: instvar ]. 

    class methodsDo:[:mthd|updater add:mthd].

    probe := [:instance |

        instVarTypes withIndexDo: [:instVarType :i | 

            instVarType union: ((Type withClass: (instance instVarAt: i) class) type trustfullness: 70). 

        ].

        nprobed := nprobed + 1.

        nprobed > 100 ifTrue:[

            "/ Probe at most 100 instancess

            ^ self

        ].   

    ].

    nprobed := 0.

    class allInstancesDo: probe.

    "/ Maube an abstract class?

    nprobed < 100 ifTrue:[ 

        class allSubInstancesDo: probe

    ].

    "Created: / 27-11-2011 / 18:04:31 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 01-03-2014 / 00:44:03 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

delayedUpdateInfoForClassOrMethod: classOrMethod

    classOrMethod isBehavior ifTrue:[

       self delayedUpdateInfoForClass: classOrMethod.

    ].

    classOrMethod isMethod ifTrue:[

       self delayedUpdateInfoForMethod: classOrMethod.

    ]

    "Created: / 27-11-2011 / 18:01:07 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

delayedUpdateInfoForMethod: method

    | inferencer |

    method mclass isNil ifTrue:["Obsolete method" ^ self ].

    method mclass programmingLanguage isSmalltalk ifFalse: [ ^ self ].

"/    Transcript showCR: 'SmallSense: updating info for: ', method printString.

    inferencer := SmalltalkInferencer forMethod: method.

    inferencer process.

    "Created: / 27-11-2011 / 18:06:43 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 26-08-2013 / 10:20:10 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!Manager class methodsFor:'documentation'!

version_HG

    ^ '$Changeset: <not expanded> $'

!

version_SVN

    ^ '$Id: SmallSense__Manager.st,v 1.2 2014/02/12 14:49:29 sr Exp $'

! !