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"
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COPYRIGHT (c) 1993 by Claus Gittinger
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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nil subclass:#VariableString
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instanceVariableNames:'contents'
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classVariableNames:''
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poolDictionaries:''
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category:'Collections-Text'
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!
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!VariableString class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1993 by Claus Gittinger
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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!
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documentation
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"
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VariableStrings can grow and shrink - in contrast to Strings which are
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fixed in size - this may change in the future.
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WARNING: This class is a historic leftover and will vanish soon.
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Dont use it.
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"
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!
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version
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^ '$Header: /cvs/stx/stx/libbasic2/VariableString.st,v 1.14 1995-11-23 01:22:07 cg Exp $'
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! !
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!VariableString class methodsFor:'initialization'!
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initialize
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1
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"clear my superclass - this makes all messages be misunderstood"
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self setSuperclass: nil
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! !
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!VariableString class methodsFor:'instance creation'!
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copyFrom:aString
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"return a new VariableString with contents copied from the argument"
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^ self basicNew setContents:(String copyFrom:aString)
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!
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new
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"return a new VariableString - with size 0"
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^ self new:0
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!
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new:size
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"return a new VariableString"
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^ (self basicNew) setContents:(String new:size)
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! !
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!VariableString methodsFor:'accessing'!
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at:index
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"return the element at index"
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^ contents at:index
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!
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at:index put:anObject
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"set the element at index"
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^ contents at:index put:anObject
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! !
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!VariableString methodsFor:'converting'!
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asStringCollection
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^ contents asStringCollection
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! !
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!VariableString methodsFor:'copying'!
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postCopy
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contents := contents copy
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! !
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!VariableString methodsFor:'error handling'!
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doesNotUnderstand:aMessage
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"this is funny: all message we do not understand, are passed
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on to the string - so we do not have to care for all
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possible messages ...(thanks to the Message class)"
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^ contents perform:(aMessage selector)
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withArguments:(aMessage arguments)
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! !
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!VariableString methodsFor:'filling & replacing'!
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replaceFrom:start to:stop with:aCollection startingAt:repStart
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"reimplemented for speed
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- can use Strings fast replace if aCollection
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is String or VariableString"
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|col|
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col := aCollection.
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(aCollection isKindOf:VariableString) ifTrue:[
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((stop - start + repStart) <= aCollection size) ifTrue:[
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col := aCollection getContents
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]
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].
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(col isMemberOf:String) ifTrue:[
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(stop <= (contents size)) ifTrue:[
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contents replaceFrom:start to:stop with:col startingAt:repStart.
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^ self
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]
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].
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^ super replaceFrom:start to:stop with:aCollection startingAt:repStart
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! !
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!VariableString methodsFor:'grow & shrink'!
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grow:newSize
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|old oldSize|
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oldSize := contents size.
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(newSize < oldSize) ifTrue:[
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contents := contents copyTo:newSize
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] ifFalse:[
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(newSize > oldSize) ifTrue:[
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old := contents.
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(newSize > (oldSize * 2)) ifTrue:[
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contents := String new:newSize
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] ifFalse:[
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contents := String new:(oldSize * 2)
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].
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contents replaceFrom:1 to:oldSize
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with:old startingAt:1
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]
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]
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! !
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!VariableString methodsFor:'private'!
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getContents
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"return the contents array"
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^ contents
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!
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setContents:aString
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"set the contents"
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contents := aString
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! !
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!VariableString methodsFor:'queries'!
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isFixedSize
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"return true if the receiver cannot grow - this will vanish once
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Arrays and Strings learn how to grow ..."
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^ false
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!
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size
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^ contents size
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! !
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VariableString initialize!
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