| author | Jan Vrany <jan.vrany@fit.cvut.cz> |
| Thu, 07 Jul 2011 23:08:07 +0100 | |
| branch | jv |
| changeset 17845 | 7e0cfaac936d |
| parent 17841 | 7abcc4aef871 |
| child 17846 | 24edc476ac18 |
| permissions | -rw-r--r-- |
| 17732 | 1 |
"{ Package: 'stx:libbasic' }"
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Object subclass:#SystemChangeNotifier |
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instanceVariableNames:'silenceLevel' |
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classVariableNames:'UniqueInstance' |
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poolDictionaries:'' |
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category:'Kernel-Classes' |
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! |
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!SystemChangeNotifier class methodsFor:'documentation'! |
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documentation |
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" |
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For now, this implementation is mostly for squeak compatibility. |
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However, over time, we will move the change notification code from ClassDescription to here, |
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to make things easier to understand, and classDescription a little bit more lightweight. |
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" |
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! ! |
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!SystemChangeNotifier class methodsFor:'instance creation'! |
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uniqueInstance |
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"I am a singleton" |
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UniqueInstance isNil ifTrue: [UniqueInstance := self basicNew initialize]. |
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^ UniqueInstance |
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" |
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UniqueInstance releaseAll. |
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UniqueInstance := nil |
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" |
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! ! |
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!SystemChangeNotifier methodsFor:'change notifications'! |
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class: trait recategorizedFrom: oldCategory to:newCategory |
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"dummy for now - will write a change record eventually" |
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! |
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classAdded:aClass inCategory:aCategoryString |
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"dummy for now - will write a change record eventually" |
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! |
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traitDefinitionChangedFrom:oldTrait to:newTrait |
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"dummy for now - will write a change record eventually" |
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! ! |
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!SystemChangeNotifier methodsFor:'initialization'! |
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initialize |
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"/ eventSource := SystemEventManager new. |
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silenceLevel := 0. |
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! ! |
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!SystemChangeNotifier methodsFor:'public'! |
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doSilently: aBlock |
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"Perform the block, and ensure that no system notification are broadcasted while doing so." |
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|result| |
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silenceLevel := silenceLevel + 1. |
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[ |
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"/ temporary hack: |
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Class withoutUpdatingChangesDo:[ |
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result := aBlock value |
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] |
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] ensure: [ |
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silenceLevel > 0 ifTrue: [ |
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silenceLevel := silenceLevel - 1 |
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] |
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]. |
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^ result. |
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! |
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isBroadcasting |
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^ silenceLevel = 0 |
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17734
406b1590afe8
Merged with trunk r10476
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17732
diff
changeset
|
78 |
! |
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406b1590afe8
Merged with trunk r10476
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17732
diff
changeset
|
79 |
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406b1590afe8
Merged with trunk r10476
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17732
diff
changeset
|
80 |
noMoreNotificationsFor: aStakeHolder |
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406b1590afe8
Merged with trunk r10476
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17732
diff
changeset
|
81 |
"dummy for now " |
|
406b1590afe8
Merged with trunk r10476
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17732
diff
changeset
|
82 |
! |
|
406b1590afe8
Merged with trunk r10476
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17732
diff
changeset
|
83 |
|
|
406b1590afe8
Merged with trunk r10476
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17732
diff
changeset
|
84 |
notify:aStakeHolder ofSystemChangesOfItem:anItemSymbol change: changeTypeSymbol using: changeMessage |
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406b1590afe8
Merged with trunk r10476
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17732
diff
changeset
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"dummy for now " |
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! ! |
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!SystemChangeNotifier class methodsFor:'documentation'! |
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version_CVS |
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^ '§Header: /cvs/stx/stx/libbasic/SystemChangeNotifier.st,v 1.4 2010/04/14 16:13:57 cg Exp §' |
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! ! |