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TerminalView subclass:#VT52TerminalView
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956
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instanceVariableNames:'state param1 param2'
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914
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classVariableNames:''
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poolDictionaries:''
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category:'Views-TerminalViews'
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!
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!VT52TerminalView class methodsFor:'documentation'!
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documentation
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"
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VT52 terminal
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[start with:]
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916
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VT52TerminalView openShell
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"
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! !
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!VT52TerminalView methodsFor:'defaults'!
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vt52KeyCodes
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^ IdentityDictionary withKeysAndValues:
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#(
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#CursorUp '\eA'
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#CursorDown '\eB'
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927
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#CursorRight '\eC'
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#CursorLeft '\eD'
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#Home '\eH'
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#Escape '\e'
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927
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#BackSpace '\b'
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#Return '\r'
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976
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#Delete '\0177'
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)
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927
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976
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"Modified: / 20.6.1998 / 17:36:39 / cg"
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! !
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956
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!VT52TerminalView methodsFor:'events'!
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defineWindowSize
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super defineWindowSize.
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rangeEndLine := numberOfLines - 1
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"Created: / 13.6.1998 / 18:15:43 / cg"
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! !
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!VT52TerminalView methodsFor:'initialization'!
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initialize
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super initialize.
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self endOfSequence.
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rangeStartLine := 1.
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rangeEndLine := numberOfLines-1.
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"Modified: / 13.6.1998 / 18:14:41 / cg"
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!
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initializeKeyboardSequences
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kbdSequences := (self vt52KeyCodes)
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! !
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!VT52TerminalView methodsFor:'processing - input'!
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doNothing
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self endOfSequence
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"Created: / 12.6.1998 / 20:40:43 / cg"
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!
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endOfSequence
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state := 0.
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"Created: / 12.6.1998 / 20:39:52 / cg"
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!
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nextPut:char
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"process a character (i.e. the shells output)"
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"/ Transcript show:state; show:' '; showCR:char storeString.
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state == #gotReturn ifTrue:[
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state := 0.
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char == Character nl ifTrue:[
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"/ cr-nl
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"/ stay in buffering mode.
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super nextPut:Character cr.
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^ self.
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].
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self endEntry.
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self cursorToBeginOfLine.
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"/ continue in initial state
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].
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state == 0 ifTrue:[
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"/ Currently, we are in initial state.
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"/ Decide what to do on the basis of the parameter char.
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(char == Character esc) ifTrue:[
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self endEntry.
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state := #gotESC.
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^ self
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].
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(char == Character nl) ifTrue:[
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self doCursorDown:1.
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^ self endEntry.
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].
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(char == Character return) ifTrue:[
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rangeEndLine ~~ numberOfLines ifTrue:[
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self endEntry.
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self cursorToBeginOfLine.
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] ifFalse:[
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state := #gotReturn.
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].
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^ self.
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].
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(char == Character backspace) ifTrue:[
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self doCursorLeft. "/ doBackspace
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^ self endEntry.
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].
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(char == Character bell) ifTrue:[
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self beep.
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^ self
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].
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char asciiValue < 32 ifTrue:[
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char ~~ Character tab ifTrue:[
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Transcript show:'unhandled control key: '; showCR:char storeString.
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]
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].
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^ super nextPut:char
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].
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state == #gotESC ifTrue:[
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"/ Currently, we are in ESC state.
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"/ Decide what to do on the basis of the parameter char.
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char == $A ifTrue:[
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"/ ESC-A
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self doCursorUp:1.
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^ self endOfSequence
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].
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char == $B ifTrue:[
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"/ ESC-B
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self doCursorDown:1.
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^ self endOfSequence
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].
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char == $C ifTrue:[
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"/ ESC-C
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self doCursorRight:1.
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^ self endOfSequence
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].
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char == $D ifTrue:[
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"/ ESC-D
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self doCursorLeft:1.
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^ self endOfSequence
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].
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char == $H ifTrue: [
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"/ ESC-H
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self doCursorHome.
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^ self endOfSequence
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].
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char == $J ifTrue: [
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"/ ESC-J
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self doClearToEnd.
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^ self endOfSequence
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].
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char == $K ifTrue: [
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"/ ESC-J
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self doClearToEndOfLine.
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^ self endOfSequence
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].
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char == $Y ifTrue: [
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"/ ESC-Y - cursor positioning
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state := #motion1.
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^ self
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].
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Transcript show:'unhandled esc-key: '; showCR:char storeString.
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].
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state == #motion1 ifTrue:[
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"/ char-value - 32 is line
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param1 := (char asciiValue - 32).
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state := #motion2.
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^ self.
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].
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state == #motion2 ifTrue:[
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"/ char-value - 32 is col
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param2 := (char asciiValue - 32).
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"/ Transcript show:'motion '; show:param1+1; show:' '; showCR:param2+1.
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self cursorVisibleLine:param1+1 col:param2+1.
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^ self endOfSequence
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].
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self doNothing
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"Modified: / 13.6.1998 / 18:18:29 / cg"
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! !
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!VT52TerminalView methodsFor:'queries'!
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terminalType
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^ #vt52
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"Created: / 10.6.1998 / 16:22:46 / cg"
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! !
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!VT52TerminalView class methodsFor:'documentation'!
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version
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^ '$Header: /cvs/stx/stx/libwidg2/VT52TerminalView.st,v 1.8 1998-06-20 15:37:02 cg Exp $'
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! !
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