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"
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COPYRIGHT (c) 1996 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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WriteStream subclass:#TextStream
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instanceVariableNames:'runs currentEmphasis'
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classVariableNames:''
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poolDictionaries:''
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category:'Streams'
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!
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!TextStream class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1996 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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562
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a textStream is much like a regular writeStream;
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however, in addition to collecting characters, it keeps
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track of any change of the emphasis, and returns a Text instance
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as its contents (in contrast to a String instance).
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Can be used to collect up attributed text.
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[author:]
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Claus Gittinger
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[see also:]
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WriteStream
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Text String
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"
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!
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examples
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"
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[exBegin]
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|s|
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s := TextStream on:''.
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s emphasis:#italic;
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nextPutAll:'hello';
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emphasis:nil;
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space;
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emphasis:#bold;
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nextPutAll:'world'.
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s contents inspect
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[exEnd]
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[exBegin]
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|s|
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s := TextStream on:''.
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s emphasis:#italic;
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nextPutAll:'hello';
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emphasis:nil;
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space;
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emphasis:#bold;
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nextPutAll:'world'.
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Transcript nextPutAll:(s contents)
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[exEnd]
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[exBegin]
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|s|
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s := TextStream on:''.
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s emphasis:#italic;
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nextPutAll:'hello';
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emphasis:nil;
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space;
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emphasis:#bold;
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nextPutAll:'world'.
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Dialog
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warn:(s contents)
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[exEnd]
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[exBegin]
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|s1 s2 flipFlop|
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s1 := PipeStream readingFrom:'ls -l'.
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s2 := TextStream on:''.
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flipFlop := true.
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[s1 atEnd] whileFalse:[
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flipFlop ifTrue:[
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s2 emphasis:(#color->Color red)
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] ifFalse:[
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s2 emphasis:nil
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].
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flipFlop := flipFlop not.
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s2 nextPutAll:(s1 nextLine).
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s2 cr.
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].
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s1 close.
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(EditTextView new contents:s2 contents) open
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[exEnd]
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"
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! !
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!TextStream methodsFor:'accessing'!
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contents
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"return the streams collected contents"
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self closeRun.
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^ Text string:super contents emphasisCollection:runs
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"
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|s|
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s := TextStream on:String new.
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s emphasis:#italic.
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s nextPutAll:'hello'.
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s emphasis:nil.
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s space.
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s emphasis:#bold.
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s nextPutAll:'world'.
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s contents
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"
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!
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emphasis:aSymbol
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"change the emphasis; all followup elements are appended with
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that emphasis in effect"
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position ~~ 1 ifTrue:[
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self closeRun.
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].
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currentEmphasis := aSymbol
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"
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|s|
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s := TextStream on:String new.
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s emphasis:#italic;
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nextPutAll:'hello';
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emphasis:nil;
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space;
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emphasis:#bold;
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nextPutAll:'world'.
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340
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s contents
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"
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! !
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!TextStream methodsFor:'private'!
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closeRun
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position ~~ 1 ifTrue:[
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runs isNil ifTrue:[
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runs := RunArray new:position-1 withAll:currentEmphasis
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] ifFalse:[
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runs add:currentEmphasis withOccurrences:(position - runs size - 1)
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]
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]
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! !
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!TextStream class methodsFor:'documentation'!
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version
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562
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184 |
^ '$Header: /cvs/stx/stx/libbasic2/TextStream.st,v 1.3 1997-08-22 13:16:15 cg Exp $'
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! !
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