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"
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COPYRIGHT (c) 1990 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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PipeStream subclass:#PrinterStream
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instanceVariableNames:''
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classVariableNames:'PrintCommand LeftMargin'
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poolDictionaries:''
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category:'Streams-External'
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!
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!PrinterStream class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1990 by Claus Gittinger
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84
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All Rights Reserved
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0
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31
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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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a stream for printing; this (concrete or abstract) class can handle only
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very dumb printers. More intelligence is added by subclasses (see
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PostscriptPrinterStream among others.)
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"
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!
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version
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^ '$Header: /cvs/stx/stx/libbasic2/PrinterStream.st,v 1.12 1995-11-23 01:51:39 cg Exp $'
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! !
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!PrinterStream class methodsFor:'initialization'!
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initialize
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"this is usually redefined by the startup-file"
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PrintCommand isNil ifTrue:[
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OperatingSystem isBSDlike ifTrue:[
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PrintCommand := 'lpr'
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] ifFalse:[
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PrintCommand := 'lp'
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]
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].
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LeftMargin isNil ifTrue:[
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LeftMargin := 0
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]
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! !
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!PrinterStream class methodsFor:'instance creation'!
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new
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"return a new stream for printing"
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^ self basicNew startPrint
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! !
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!PrinterStream class methodsFor:'accessing'!
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leftMargin:aNumber
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"set the number of blanks for the left margin"
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LeftMargin := aNumber
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!
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printCommand
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"return the command for printing (usually lp or lpr)"
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^ PrintCommand
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!
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printCommand:aString
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"set the command for printing (usually lp or lpr)"
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PrintCommand := aString
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! !
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!PrinterStream methodsFor:'access writing'!
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bold
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"set font to bold
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- ignore here, since this class does not know anything about the printer"
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^ self
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!
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courier
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"set font to courier
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- ignore here, since this class does not know anything about the printer"
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^ self
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!
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cr
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"send a carriage-return to the printer"
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super nextPut:(Character cr).
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self spaces:LeftMargin
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!
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helvetica
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"set font to helvetic
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- ignore here, since this class does not know anything about the printer"
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^ self
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!
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italic
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"set font to italic
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- ignore here, since this class does not know anything about the printer"
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^ self
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!
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lineLength
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"the printer pages width (in characters)"
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^ 80
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!
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nextPut:aCharacter
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"send some characters to the printer - translate as needed"
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(aCharacter == Character cr) ifTrue:[
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super nextPut:(Character cr).
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self spaces:LeftMargin
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] ifFalse:[
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super nextPut:aCharacter
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]
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!
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nextPutAll:aCollection
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"send some characters to the printer - translate as needed"
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aCollection do:[:aChar |
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self nextPut:aChar
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]
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!
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nextPutAllUntranslated:aCollection
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"send some raw characters to the printer"
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super nextPutAll:aCollection
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!
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nextPutUntranslated:aCharacter
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"send a raw character to the printer"
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super nextPut:aCharacter
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!
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normal
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"set font to normal (non-bold, non-italic)
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- ignore here, since this class does not know anything about the printer"
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^ self
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!
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spaces:aNumber
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"send some spaces to the printer"
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aNumber timesRepeat:[
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super nextPut:(Character space)
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]
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!
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times
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"set font to times
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- ignore here, since this class does not know anything about the printer"
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^ self
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! !
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!PrinterStream methodsFor:'open/close'!
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close
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self endPrint.
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super close
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!
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endPrint
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^ self
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!
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startPrint
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super writingTo:PrintCommand.
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self spaces:LeftMargin
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! !
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PrinterStream initialize!
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