(FILECREATED "24-Aug-84 18:10:37" {ERIS}<LISPCORE>SOURCES>TTYIN.;5 711235Q
changes to: (VARS TTCOMPILETIME TTYINCOMS)
(FNS TTYIN1 TTBIN TTWAITFORINPUT TTYIN.SETUP TTYIN.CLEANUP TTYINENTRYFN TTYIN.READ
TTYIN.FINISH DO?CMD TTED TTYIN.PPTOFILE)
(RECORDS TTYINBUFFER TTYINWINDOWSTATE)
(MACROS REALBITS)
previous date: "13-May-84 17:37:44" {ERIS}<LISPCORE>SOURCES>TTYIN.;2)
(* Copyright (c) 1982, 1983, 1984 by Xerox Corporation. All rights reserved.)
(PRETTYCOMPRINT TTYINCOMS)
(RPAQQ TTYINCOMS [(E (RESETSAVE (RADIX 8)))
(FNS * TTYINFNS)
(FNS * TTDISPLAYFNS)
(COMS (* Mouse handling)
(FNS DO.MOUSE DO.SHIFTED.SELECTION COPY.SEGMENT DELETE.LONG.SEGMENT
DELETE.LONG.SEGMENT1 INVERT.LONG.SEGMENT INVERT.SEGMENT
BRACKET.CURRENT.WORD TTBEFOREPOS TTNEXTPOS TTRACKMOUSE))
(COMS (* Support functions. These are all macros or for debugging)
(FNS * TTSUPPORTFNS))
[COMS (* Auxiliary fns. These are outside the TTYIN block, and are provided to aid
the outside world in special interfaces to TTYIN)
(FNS SETREADFN TTYINENTRYFN TTYINREADP TTYINREAD TTYINFIX CHARMACRO?
TTYINMETA \SET.TTYINBOLDFONT TTYIN.LASTINPUT)
(FNS TTED DO.EE TTYINEDIT SIMPLETEXTEDIT SET.TTYINEDIT.WINDOW TTYIN.PPTOFILE
TTYIN.SCRATCHFILE)
(USERMACROS EE ED BUF)
(LISPXMACROS TV BUF)
(INITVARS (TTYINEDITWINDOW)
(TTYINEDIT.SCRATCH)
(TTYINEDITPROMPT T)
(TTYINAUTOCLOSEFLG)
(TTYINPRINTFN)
(TTYIN?=FN))
(ADDVARS (AFTERSYSOUTFORMS (SETQ TTYINEDIT.SCRATCH NIL]
(DECLARE: DOEVAL@COMPILE DONTCOPY (COMS * TTCOMPILETIME))
(INITVARS (TTYINBUFFER)
(?ACTIVATEFLG T)
(EDITPREFIXCHAR)
(EMACSFLG T)
(SHOWPARENFLG T)
(TTYINBSFLG T)
(TTYINCOMPLETEFLG T)
(TTYINUSERFN)
(TYPEAHEADFLG T)
(null "")
(DEFAULTPROMPT "** ")
(TTYJUSTLENGTH -8)
(\INSIDE.TTYIN)
(TTYINERRORSETFLG)
(TTYINRAISEFLG T)
(\TTYIN.RESTOREBUFCODE 194)
(\TTYIN.METASTATE)
(TTYINAUTOFILLMARGIN 8)
(TTYINFIXLIMIT 50)
(TTYINDEBUGFLG)
(HISTSTR1 "from file:")
(TTYINCOMMENTCHAR))
(P (MOVD? (QUOTE NILL)
(QUOTE GUESTUSER?))
(MOVD? (QUOTE FIXSPELL)
(QUOTE FIXSPELL!!))
(MOVD? (QUOTE HELPSYS)
(QUOTE XHELPSYS))
(PUTDQ? SPRINTT [LAMBDA (X)
(PRIN1 X])
(MOVD? (QUOTE NILL)
(QUOTE WINDOWWORLD))
(MOVD? (QUOTE LISPXFIX)
(QUOTE NONTTYINLISPXFIX)))
(ADDVARS (TTYINREADMACROS)
(TTYINRESPONSES)
(LISPXCOMS (STOP . OK)))
(PROP VARTYPE TTYINREADMACROS)
[DECLARE: DONTEVAL@LOAD DOCOPY (P [COND ((CCODEP (QUOTE TTYIN))
(CHANGENAME (QUOTE PROMPTCHAR)
(QUOTE LISPXREADP)
(QUOTE TTYINREADP))
(SETREADFN)
(MOVD (QUOTE TTYINFIX)
(QUOTE LISPXFIX]
(\SET.TTYINBOLDFONT (DEFAULTFONT (QUOTE DISPLAY]
(GLOBALRESOURCES \TTWAITBOX)
(DECLARE: DONTEVAL@LOAD DOEVAL@COMPILE DONTCOPY COMPILERVARS
(ADDVARS (NLAMA TTBOUTN TTBOUT)
(NLAML TTED CHARMACRO? CAPABILITY?)
(LAMA])
(RPAQQ TTYINFNS (TTYIN TTYIN.SETUP TTYIN.CLEANUP TTYIN1 TTYIN1RESTART TTYIN.FINISH TTYIN.READ
TTYIN.BALANCE ADDCHAR ADDCHARS.INSERTING ADDNAKEDCHAR ADDSILENTCHAR ADDTAB
ADJUSTLINE ADJUSTLINE.AND.RESTORE AT.END.OF.SCREEN AT.END.OF.TEXT AUTOCR?
BACKSKREAD BACKWARD.DELETE.TO BREAKLINE BUFCHARCOUNT BUFTAILP CHECK.MARGIN
CLEAR.LINE? CREATE.LINE CURRENT.WORD DELETE.TO.END DELETELINE DELETETO
DELETETO1 DO.EDIT.COMMAND DO.EDIT.PP DO?CMD TTYIN.PRINTARGS TTYIN.READ?=ARGS
DOTABS EDITCOLUMN EDITNUMBERP END.DELETE.MODE ENDREAD? FIND.LINE
FIND.LINE.BREAK FIND.MATCHING.QUOTE FIND.MATCHING.WORD FIND.NEXT.WORD
FIND.NON.SPACE FIND.START.OF.WORD FORWARD.DELETE.TO GO.TO.ADDRESSING
GO.TO.FREELINE GO.TO.RELATIVE INIT.CURSOR INSERT.CHAR.IN.BUF INSERT.NODE
INSERTLINE KILL.LINES KILLSEGMENT L-CASECODE MOVE.BACK.TO MOVE.FORWARD.TO
MOVE.TO.LINE MOVE.TO.NEXT.LINE MOVE.TO.START.OF.WORD MOVE.TO.WHEREVER
NTH.COLUMN.OF NTH.RELATIVE.COLUMN.OF OVERFLOW? OVERFLOWLINE? PREVLINE PREVWORD
PROPERTAILP READFROMBUF RENUMBER.LINES RESTORE.CURSOR RESTOREBUF RETYPE.BUFFER
SAVE.CURSOR SCANBACK SCANFORWARD SCRATCHCONS SEGMENT.LENGTH SEGMENT.BIT.LENGTH
SETLASTC SETTAIL? SHOW.MATCHING.PAREN SKIP/ZAP START.NEW.LINE
START.OF.PARAGRAPH? TTADJUSTWORD TTBIN TTBITWIDTH TTCOMPLETEWORD TTCRLF
TTCRLF.ACCOUNT TTDELETECHAR TTDELETELINE TTDELETEWORD TTECHO.TO.FILE
TTGIVEHELP TTGIVEHELP1 TTGIVEHELP2 TTLASTLINE TTLOADBUF TTNEXTCHAR TTNEXTLINE
TTNEXTNODE TTNLEFT TTNTH TTNTHLINE TTPRIN1 TTPRIN2 TTPROMPTCHAR TTRATOM TTREAD
TTREADLIST TTRUBOUT TTSKIPSEPR TTSKREAD TTUNREADBUF TTWAITFORINPUT TTYINSTRING
TYPE.BUFFER U-CASECODE U/L-CASE WORD.MATCHES.BUFFER))
(DEFINEQ
(TTYIN
[LAMBDA (PROMPT SPLST HELP OPTIONS ECHOTOFILE TABS UNREADBUF RDTBL)
(* bvm: "20-Mar-84 11:17")
(DECLARE (SPECVARS SPLST HELP TABS UNREADBUF RDTBL ECHOTOFILE))
(* * TTYIN is a general input function. See TTYIN.DOC for details on the arguments and use of this fn.
TTYIN was designed and implemented by Bill van Melle at Stanford.)
(* * Some implementation notes: The bulk of the code here is oriented toward smart use on display terminals,
specifically the datamedia. If on a dm, TTYIN puts the terminal in binary mode so it can read the 200q bit
supplied by the EDIT key. Most of the cursor-moving commands from TVEDIT are available or slightly modified, and a
few extra are supplied as well.)
(* The text being typed in is represented as a list of character codes, with a data structure on top of it which
partitions it by line. Thus, you can view the text as one string, or broken into lines, depending on the function
desired. \BUFFER is the pointer to the start of the buffer, \ENDBUFFER points one past the end.
TTYIN saves up cons cells between calls and reuses them; \ENDBUFFER points to this list of free cells.
TTYINBUFFER is the master record, which keeps assorted global information about where the cursor is, and saves
some state info from one call to the next, enabling the restore previous buffer command. See BUFFIELDS for
documentation of its fields; the fields are accessed by the ! construct for efficiency. One of the fields points
to the LINE records which describe the two-dimensional structure of the input. Each record points to the region of
the buffer containing the text for one line, and has fields indicating the first and last columns, and a pointer
to the next line record. \ARROW always points to the current LINE record -
\CURSOR points to where in the buffer the cursor appears. -
This representation is not terribly space-efficient for large buffers, but it is easily manipulated, and fast.
If there is a particularly long input, there will be many cons cells tied up in TTYINBUFFER, so a good thing to do
when trying to free up space is reset TTYINBUFFER to NIL to force its regeneration from scratch.)
(RESETLST (PROG ((\INSIDE.TTYIN T)
(\TTYINSTATE TTYINBUFFER)
(\DSP (TTYDISPLAYSTREAM))
(\RDTBLSA (fetch READSA of (\GTREADTABLE RDTBL)))
(\RAISEINPUT (OR TTYINRAISEFLG (fetch RAISEFLG of \PRIMTERMTABLE)))
(\FIRSTTIME T)
(TYPEAHEAD TYPEAHEADFLG)
\INITPOS \BMARG \LMARG \RMARG \CHARWIDTH \CHARHEIGHT \DESCENT \FONT
\VARIABLEFONT \TEXTURE \TTPAGELENGTH \CURSORROW \CURSORCOL \HOMEROW \HOMECOL
\PROMPT1 \PROMPT2 \FIRSTLINE \LASTAIL \LASTAILCOL \LASTAILROW \FIX \LOC.ROW.0
\LASTCHAR \SPLSTFLG VALUE \BUFFER \ENDBUFFER \CURSOR \ARROW \DELETING \INSERTING
\EDITBIT \DONTCOMPLETE \AUTOFILL \NOVALUE \NOFIXSPELL \STRINGVALUE \REPEAT
\COMMAND \READING \LISPXREADING DIRECTORY/FILE \NOPROMPT \FILLINGBUFFER
\LAST.DELETION)
(SETQ TTYINBUFFER) (* Global resource. Any ttyin calls while we are running
need to create their own)
[OR (LISTP \TTYINSTATE)
(SETQ \TTYINSTATE (create TTYINBUFFER
FIRSTLINE ←(create LINE
START ←(CONS 0)
ROW ← 0]
(TTYIN.SETUP)
[COND
((AND SPLST (NLISTP SPLST))
(SETQ SPLST (CONS SPLST]
(for OP inside OPTIONS do (SELECTQ OP
((NOFIXSPELL MUSTAPPROVE CRCOMPLETE)
(SETQ \NOFIXSPELL (SETQ \DONTCOMPLETE OP)))
(\NOVALUE (SETQ \NOVALUE OP))
(STRING (SETQ \STRINGVALUE OP))
(COMMAND (SETQ \COMMAND OP))
(REPEAT (SETQ \REPEAT OP))
(NORAISE (SETQ \RAISEINPUT))
(RAISE (SETQ \RAISEINPUT T))
(TEXT (SETQ \REPEAT (SETQ \NOVALUE
(SETQ \AUTOFILL OP)))
(SETQ \RAISEINPUT))
(FIX (SETQ \FIX OP))
(READ (SETQ \READING (SETQ \AUTOFILL OP)))
(LISPXREAD [SETQ TYPEAHEAD (SETQ \LISPXREADING
(SETQ \READING (SETQ \AUTOFILL
OP]
(SETQ \RAISEINPUT
(fetch RAISEFLG of \PRIMTERMTABLE)
))
(EVALQT
(* like LISPXREAD, but with added proviso about checking
for EVALQT right-bracket hacks)
[SETQ TYPEAHEAD (SETQ \LISPXREADING
(SETQ \READING (SETQ \AUTOFILL OP]
(SETQ \RAISEINPUT
(fetch RAISEFLG of \PRIMTERMTABLE)))
((FILE DIRECTORY USER)
(SETQ DIRECTORY/FILE OP))
(TYPEAHEAD (SETQ TYPEAHEAD OP))
(FILLBUFFER (SETQ \FILLINGBUFFER OP))
(NOPROMPT (SETQ \NOPROMPT (SETQ \FIRSTTIME OP))
)
NIL))
[COND
((EQ PROMPT T)
(SETQ \PROMPT1 (SETQ \PROMPT2)))
(T [COND
((NOT PROMPT)
(SETQ PROMPT DEFAULTPROMPT))
[(LISTP PROMPT)
(COND
((NLISTP (CDR PROMPT)) (* User has already supplied us with a dotted pair of
prompts)
(SETQ \PROMPT1 (CAR PROMPT))
(SETQ \PROMPT2 (CDR PROMPT)))
(T (SETQ PROMPT (SUBSTRING PROMPT 2 -2]
((AND (NOT (STRINGP PROMPT))
(NOT (LITATOM PROMPT)))
(SETQ PROMPT (MKSTRING PROMPT]
(COND
((NLISTP PROMPT) (* Now create 2 prompts out of one)
(SETQ \PROMPT1 PROMPT)
(SETQ \PROMPT2 (COND
((AND \LISPXREADING (LITATOM PROMPT))
NIL)
((AND (OR \REPEAT \LISPXREADING)
(ILESSP (NCHARS PROMPT)
14Q)) (* Okay to use this short prompt as a secondary prompt)
PROMPT)
(T (QUOTE ...]
(COND
((NOT SPLST)
(SETQ \DONTCOMPLETE T)))
(COND
(\READING (SETQ \REPEAT)))
(COND
((AND TTYINMAILFLG (NEQ \READING (QUOTE EVALQT))
(ILESSP \INITPOS 5))
(MAILWATCH)))
(COND
((NOT TYPEAHEAD)
(CLEARBUF T)))
LP (SETQ VALUE (NLSETQ (TTYIN1)))
(COND
((NOT VALUE) (* NLSETQ aborted. Try again.)
(COND
((OR (NOT TTYINERRORSETFLG)
\LISPXREADING) (* LISPXREAD is not errorset-protected, so why should
this be?)
(COND
(\CURSORCOL (* If this is NIL, then we haven't initialized enough to
go anywhere)
(GO.TO.FREELINE)))
(RESTOREMOD)
(COND
((NEQ \BUFFER \ENDBUFFER)
(replace OLDTAIL of \TTYINSTATE with \ENDBUFFER)))
(ERROR!)))
(GO LP)))
(SELECTQ (SYSTEMTYPE)
[D (COND
((AND (NEQ \BUFFER \ENDBUFFER)
(IGREATERP (add (fetch STORAGECOUNTER of \TTYINSTATE)
1)
12Q)) (* Release some storage, since it seems to accumulate
and fragment)
(replace STORAGECOUNTER of \TTYINSTATE with 0)
(FRPLACD \ENDBUFFER]
NIL)
(SETQ VALUE (CAR VALUE))
(POSITION T 0)
[COND
((AND CTRLUFLG (NEQ VALUE T)) (* user typed ↑U to edit input)
(SETQ CTRLUFLG)
(PROG ((\INSIDE.TTYIN))
(COND
((OR (LITATOM VALUE)
(GUESTUSER?)) (* guests may not edit)
)
((LISTP VALUE)
(EDITE VALUE))
(T (SETQ VALUE (CAR (EDITE (LIST VALUE)
(QUOTE (REPACK]
(COND
((AND TTYINMAILFLG (NEQ \READING (QUOTE EVALQT)))
(* Note time of last user input)
(MWNOTE)))
(RETURN VALUE])
(TTYIN.SETUP
[LAMBDA NIL (* bvm: "24-Aug-84 16:32")
(SELECTQ (SYSTEMTYPE)
(D (TOTOPW (TTYDISPLAYSTREAM))
(SETQ \DSP (TTYDISPLAYSTREAM)) (* Compute this afresh now in case it changed by the
creation of a new tty window)
[COND
((WINDOWWORLD) (* Disable buttons so we can do selection)
(PROG ((WINDOW (WFROMDS \DSP)))
(replace (TTYINBUFFER TTOLDRIGHTFN) of \TTYINSTATE
with (WINDOWPROP WINDOW (QUOTE RIGHTBUTTONFN)
(QUOTE TOTOPW)))
(replace (TTYINBUFFER TTOLDBUTTONFN) of \TTYINSTATE
with (WINDOWPROP WINDOW (QUOTE BUTTONEVENTFN)
(QUOTE TOTOPW)))
(replace (TTYINBUFFER TTOLDENTRYFN) of \TTYINSTATE
with (WINDOWPROP WINDOW (QUOTE WINDOWENTRYFN)
(QUOTE TTYINENTRYFN)))
(replace (TTYINBUFFER TTYINWINDOW) of \TTYINSTATE with WINDOW)
(WINDOWPROP WINDOW (QUOTE TTYINSTATE)
(fetch (TTYINBUFFER TTYINWINDOWSTATE) of \TTYINSTATE))
(RESETSAVE NIL (LIST (FUNCTION TTYIN.CLEANUP)
\TTYINSTATE]
[SETQ \CHARWIDTH (FCHARWIDTH (CHARCODE A)
(SETQ \FONT (DSPFONT NIL \DSP]
(SETQ \VARIABLEFONT (NEQ \CHARWIDTH (FCHARWIDTH (CHARCODE i)
\FONT)))
(SETQ \CHARHEIGHT (FONTPROP \FONT (QUOTE HEIGHT)))
(SETQ \DESCENT (FONTPROP \FONT (QUOTE DESCENT)))
(* How many pixels below the baseline this font goes)
(SETQ \TEXTURE (DSPTEXTURE NIL \DSP))
(SETQ \TTPAGELENGTH (PAGEHEIGHT NIL \DSP))
(SETQ \LMARG (DSPLEFTMARGIN NIL \DSP)) (* bit pos of left margin)
(SETQ \RMARG (DSPRIGHTMARGIN NIL \DSP)) (* bit pos of right margin, dsp relative)
(SETQ \INITPOS (IDIFFERENCE (DSPXPOSITION NIL \DSP)
\LMARG)))
(PROG (VALUE) (* On Twenex...)
(SETQ DISPLAYTERMFLG (DISPLAYTERMP))
(COND
([AND CHECKNIL? (SETQ VALUE (OR (CAR NIL)
(CDR NIL]
(PRIN2 (COND
((CAR NIL)
(QUOTE CAR))
(T (QUOTE CDR)))
T)
(PRIN1 " of NIL was smashed with " T)
(PRINT (SETQ CAR/CDRNIL VALUE)
T)
(SETQ VALUE (FRPLNODE NIL NIL NIL])
(TTYIN.CLEANUP
[LAMBDA (\TTYINSTATE) (* bvm: "24-Aug-84 16:32")
(PROG ((WINDOW (fetch TTYINWINDOW of \TTYINSTATE)))
(COND
(WINDOW (WINDOWPROP WINDOW (QUOTE RIGHTBUTTONFN)
(fetch (TTYINBUFFER TTOLDRIGHTFN) of \TTYINSTATE))
(WINDOWPROP WINDOW (QUOTE BUTTONEVENTFN)
(fetch (TTYINBUFFER TTOLDBUTTONFN) of \TTYINSTATE))
(WINDOWPROP WINDOW (QUOTE WINDOWENTRYFN)
(fetch (TTYINBUFFER TTOLDENTRYFN) of \TTYINSTATE))
(WINDOWPROP WINDOW (QUOTE TTYINSTATE)
NIL)))
(SETQ TTYINBUFFER \TTYINSTATE])
(TTYIN1
[LAMBDA NIL (* bvm: "24-Aug-84 15:44")
(* * The main moby subfn of TTYIN. Is errorset protected in caller)
(PROG (CHAR MATCHED RESULT STARTOFWORD X TMP (DRIBFL (DRIBBLEFILE)))
(COND
((SETQ CHAR (fetch (LINEBUFFER PEEKEDCHAR) of \LINEBUF.OFD))
(* Handle peeked char)
[COND
((AND (OR (NULL \PROMPT1)
(EQ \FIRSTTIME (QUOTE NOPROMPT)))
(OR T (fetch (LINEBUFFER PEEKEDECHOFLG) of \LINEBUF.OFD))
(IGEQ CHAR (CHARCODE SPACE))
(ILESSP CHAR (CHARCODE DEL)))
(* Want to avoid echoing peeked char twice. Only feasible to do so if we were called with no prompt, implying that
there is some hope that the preceding char on the line is the peeked char)
(SETQ X (FCHARWIDTH CHAR \FONT))
(DSPBACKUP X \DSP)
(SETQ \INITPOS (IDIFFERENCE \INITPOS X]
(replace (LINEBUFFER PEEKEDCHAR) of \LINEBUF.OFD with NIL)))
(SETQ \LASTAIL)
RESTART
PROMPT0
(TTYIN1RESTART)
(COND
((NOT \FIRSTTIME) (* Space over to where we started)
(GO.TO.ADDRESSING \INITPOS 0)))
(SETQ RESULT NIL)
PROMPT1
(INIT.CURSOR \INITPOS)
(COND
[(AND (EQ \FIRSTTIME (QUOTE NOPROMPT))
\PROMPT1) (* Prompting has already happened;
account for it)
(COND
((ILESSP (SETQ X (IDIFFERENCE \INITPOS (STRINGWIDTH \PROMPT1 \FONT)))
0) (* Caller is consfused; prompt couldn't have fit.
Typically happens when LISPXREAD is called by other than
LISPX)
(SETQ \PROMPT1))
(T (SETQ \INITPOS X]
(T (TTPROMPTCHAR \ARROW)))
(replace FIRSTCOL of \ARROW with (replace LASTCOL of \ARROW with \CURSORCOL))
[COND
([OR (NLISTP TABS)
(NOT (SMALLP (CAR TABS]
(SETQ TABS))
((NOT (IGREATERP (ITIMES (SUB1 (CAR TABS))
\CHARWIDTH)
\CURSORCOL)) (* Caller specified first tabstop as the position of the
first char; we don't treat that as a tabstop, so peel it
off)
(SETQ TABS (CDR TABS]
[COND
[UNREADBUF (* something to preload buffer with)
(COND
((FIXP UNREADBUF)
(SETQ CHAR UNREADBUF) (* interpret number as character code of something to
type ahead, usually altmode)
(SETQ UNREADBUF NIL)
(GO SELECTCHAR))
(T (TTLOADBUF (PROG1 UNREADBUF (SETQ UNREADBUF NIL]
(\FIRSTTIME
(* (for FORM in AFTERPROMPTCHARFORMS bind REFRESH when (EVAL FORM) do (SETQ REFRESH T) (* User forms to do after
prompt is printed but before we do anything more. If one returns T, means it altered the display) finally
(COND (REFRESH (SETQ \FIRSTTIME) (GO PROMPT1)))))
]
(SETQ \FIRSTTIME)
(COND
(CHAR (GO SELECTCHAR)))
CHAR(AND CHAR (SETQ \LASTCHAR CHAR))
(SETQ CHAR (TTBIN))
SELECTCHAR
[COND
([AND (SETQ X (FASSOC (COND
(\EDITBIT (LOGOR CHAR 200Q))
(T CHAR))
TTYINREADMACROS))
(OR [NLISTP (SETQ X (CDR (SETQ TMP X]
(AND (COND
((EQ (CAR X)
T)
(EMPTY.BUFFER))
((LISTP (CAR X))
(EVAL (CAR X)))
(T (* Old style macros that worked only at start of buffer)
(SETQ X TMP)
(EMPTY.BUFFER)))
(OR (NLISTP (SETQ X (CDR X)))
(SETQ X (EVAL X]
(* Simple read macros: if you type the char on a blank line, and the macro returns something, use it as the value
of the READ (or whatever))
(COND
[(FIXP X) (* Special: means pretend this CHARACTER code was typed)
(SELECTQ X
(0 (* No action)
(GO CHAR))
(-1 (* Means refresh line, (QUOTE cause) terminal control
was taken away)
(GO PROMPT1))
(PROGN [COND
((ZEROP (SETQ CHAR (LOGAND X 177Q)))
(* another way to get edit prefix)
(SETQ CHAR (TTBIN]
(SETQ \EDITBIT (NOT (ZEROP (LOGAND X 200Q]
((EMPTY.BUFFER) (* For now I'm not handling funny results in the middle)
(SETQ RESULT (OR (LISTP X)
(LIST X)))
(GO DOCRLF]
(COND
(\EDITBIT (SETQ \INSERTING) (* Edit bit on any command stops insert mode)
(COND
((NOT (SETQ CHAR (DO.EDIT.COMMAND CHAR)))
(GO CHAR))) (* Fall thru if edit char gave us something to chomp on)
))
[COND
((AND (ILESSP CHAR 400Q)
(SELECTC (fetch TERMCLASS of (\SYNCODE \PRIMTERMSA CHAR))
(CHARDELETE.TC (TTDELETECHAR)
T)
(LINEDELETE.TC (TTDELETELINE)
T)
(WORDDELETE.TC (TTDELETEWORD)
T)
(RETYPE.TC (* ↑R retype)
[RETYPE.BUFFER (COND
((OR (ON.FIRST.LINE)
(NOT (EMPTY.LINE)))
\ARROW)
(T (* If sitting on empty line, refresh the previous line)
(PREVLINE \ARROW 1]
(COND
((EQ CHAR (SETQ CHAR (TTBIN)))
(* two ↑R's means retype whole buffer)
(OR DISPLAYTERMFLG (TTCRLF))
(* set off full retype by double line)
(RETYPE.BUFFER \FIRSTLINE T))
(T (GO SELECTCHAR)))
T)
NIL)))
((AND \FILLINGBUFFER (EQ (fetch WAKEUP of (\SYNCODE \RDTBLSA CHAR))
IMMEDIATE.RMW)
(AT.END.OF.TEXT \CURSOR)) (* Immediate read macro--return now)
(GO DOCRLF))
(T (SELECTC CHAR
[(CHARCODE ESCAPE)
(COND
(SPLST (* try to complete from spelling list)
(OR (TTCOMPLETEWORD)
(BEEP)))
((TENEXCOMPLETE CHAR DIRECTORY/FILE)
(* altmode indicated file/directory completion, done in
TENEXCOMPLETE)
NIL)
((AND TTYINCOMPLETEFLG \LISPXREADING (COND
((SETQ STARTOFWORD (CURRENT.WORD))
(SETQ MATCHED (FIND.MATCHING.WORD USERWORDS STARTOFWORD)))
((AND (NEQ TTYINCOMPLETEFLG 0)
(NOT (EMPTY.BUFFER)))
(* naked altmode stands for LASTWORD.
Don't do this on empty buffer, so as not to interfere
with P.A.'s * command)
(SETQ MATCHED (FRPLACA (CONSTANT (CONS))
LASTWORD))
LASTWORD))) (* special option -- do altmode completion on USERWORDS,
a list of fns/vars referenced recently)
(SETQ CHAR (CONSTANT DIDESCAPECODE))
(* Kludge used by ? routine below)
(OR (TTCOMPLETEWORD NIL NIL MATCHED (OR STARTOFWORD \CURSOR))
(BEEP)))
(T (* no special significance)
(ADDNAKEDCHAR (CHARCODE ESCAPE]
((CHARCODE (%" *))
(ADDCHAR CHAR)
(DOTABS TABS))
((CHARCODE TAB)
(OR \DONTCOMPLETE (TTCOMPLETEWORD T))
(OR (DOTABS TABS)
(ADDTAB)))
((CHARCODE (SPACE %( , %[)) (* break or sepr: try to complete what we have)
(OR \DONTCOMPLETE (TTCOMPLETEWORD T))
(OR (AND (EQ CHAR (CHARCODE SPACE))
(AUTOCR?))
(ADDCHAR CHAR)))
[(CHARCODE (%) %])) (* Right paren/bracket. See if it terminates read)
(OR \DONTCOMPLETE (TTCOMPLETEWORD T))
(SETQ STARTOFWORD \CURSOR)
(ADDCHAR CHAR)
(COND
(\READING (COND
((ENDREAD?)
(GO DOCRLF))
((AND SHOWPARENFLG (CAPABILITY? \CURSOR)
(NOT (TYPEAHEAD?)))
(* prime conditions for hack to show which paren it
matched)
(SHOW.MATCHING.PAREN STARTOFWORD]
[(CHARCODE ?) (* supply alternative completions)
(COND
([NOT (AND ?ACTIVATEFLG (OR SPLST (EQ \LASTCHAR DIDESCAPECODE))
(AT.END.OF.BUF)
(SETQ STARTOFWORD (CURRENT.WORD))
[NOT (FMEMB (CAR (NLEFT STARTOFWORD 1 \ENDBUFFER))
(CHARCODE (? %%]
(NOT (PROGN (FRPLACA \ENDBUFFER (CHARCODE ?))
(FIND.MATCHING.WORD SPLST STARTOFWORD
(CDR \ENDBUFFER]
(* Cases where ? is not acted on: ?ACTIVATEFLG not set; no spelling list; line is a comment;
no word is in progress; previous char is also a ? (allows ?? etc.) or %%; or ? is a valid completion)
(ADDCHAR CHAR))
((NOT (SETQ MATCHED (FIND.MATCHING.WORD (OR SPLST USERWORDS)
STARTOFWORD)))
(BEEP) (* No match. Ring the bell, but accept the ? as is)
(ADDCHAR CHAR))
((TTCOMPLETEWORD NIL T MATCHED STARTOFWORD)
(* there was a unique completion)
)
(T (SAVE.CURSOR)
(GO.TO.FREELINE)
(TTPRIN1 "one of ")
[do (TTPRIN1 (INPART (CAR MATCHED)))
(COND
((SETQ MATCHED (FIND.MATCHING.WORD (CDR MATCHED)
STARTOFWORD))
(TTPRIN1 ", "))
(T (RETURN]
(COND
(DISPLAYTERMFLG (RESTORE.CURSOR))
(T (RETYPE.BUFFER \ARROW]
[(CHARCODE CR) (* terminate line)
[COND
((NOT \EDITBIT) (* i.e. not edit-CR)
[COND
((OR (AT.END.OF.LINE)
(INSERTING)) (* Check for ? and ?= macros)
(PROG ((START (fetch START of \ARROW))
TAIL)
(COND
((EQ \CURSOR START)
(RETURN)))
(SETQ TAIL (NLEFT START 1 \CURSOR))
(* Look at last char on line)
(SELCHARQ (CAR TAIL)
[? (COND
((AND (DEFINEDP (QUOTE XHELPSYS))
[OR (EQ TAIL START)
(BREAK.OR.SEPRP (CAR (NLEFT START 1
TAIL]
(DO?CMD (QUOTE ?)
TAIL))
(GO RETYPEBUFFER]
[= (COND
((AND (NEQ TAIL START)
(EQ (CAR (SETQ TAIL
(NLEFT START 1 TAIL)))
(CHARCODE ?))
[OR (EQ TAIL START)
(BREAK.OR.SEPRP (CAR (NLEFT START 1
TAIL]
(DO?CMD (QUOTE ?=)
TAIL))
(GO CHAR]
NIL]
(COND
((AND (INSERTING)
(NOT (AT.END.OF.TEXT \CURSOR)))
(COND
((OR \REPEAT \READING) (* Insert a <cr> and continue reading)
(BREAKLINE EOLCHARCODE)
(GO CHAR))
(T (* <cr> typed here would terminate, so unread what's
left)
(TTUNREADBUF)
(SETQ \INSERTING]
(COND
[(NOT (AT.END.OF.BUF))
(COND
((ON.LAST.LINE)
(SETQ \CURSOR \ENDBUFFER))
((AND \READING (NOT \PROMPT2)
(AT.END.OF.TEXT (fetch END of \ARROW)))
(* Really the same condition as previous clause: there are lines after this one, but they're blank, so it looks
like we're on the last line)
(MOVE.FORWARD.TO (fetch END of \ARROW))
(* have to make the extra stuff go away so the finishing
routines are happy)
(DELETE.TO.END))
(T (DO.EDIT.COMMAND (CHARCODE CR))
(* CR on other than last line just means go down one)
(GO CHAR]
((OR (NOT \DONTCOMPLETE)
(EQ \DONTCOMPLETE (QUOTE CRCOMPLETE)))
(TTCOMPLETEWORD T)))
(COND
((COND
(\READING (TTSKREAD \BUFFER))
[\REPEAT (AND (ON.FIRST.LINE)
(OR (EQ (CAR \BUFFER)
TTYINCOMMENTCHAR)
(AND \COMMAND (EQ (FIND.NEXT.WORD (FIND.NON.SPACE
\BUFFER))
\ENDBUFFER]
(T T)) (* Terminating conditions: no REPEAT, or first line is a
comment or has a single command on it)
(SETQ CTRLVFLG (SETQ RESULT))
(SETQ CHAR (CHARCODE EOL)) (* Lisp likes to treat cr as
(choke) EOL)
(GO DOCRLF))
(T (START.NEW.LINE EOLCHARCODE]
[(CHARCODE ↑X) (* Go to end of expression, return if parens balance)
(COND
((TTYIN.BALANCE)
(SETQ CHAR (CHARCODE EOL))
(GO DOCRLF))
(T (BEEP]
[(CHARCODE ↑V)
(COND
[\READING (* Means enter control char)
(ADDNAKEDCHAR (SETQ CHAR (SELCHARQ (SETQ CHAR (TTBIN))
((RUBOUT ?)
(* DELETE is ↑?)
177Q)
(LOGAND CHAR 37Q]
((AND (EQ \REPEAT (QUOTE TEXT))
(AT.END.OF.BUF)) (* terminate multiline input and sets special flag)
(SETQ CTRLVFLG T)
(TTBOUT ↑ V)
(GO DOCRLF))
(T (BEEP]
[(CHARCODE ↑Z) (* ↑Z terminates multiline input)
(COND
((AND \REPEAT (AT.END.OF.BUF))
(TTBOUT ↑ Z)
(SETQ CTRLVFLG)
(GO DOCRLF))
(T (BEEP]
[(CHARCODE ↑Y) (* ↑Y invokes user exec)
(COND
((AND \READING (NOT \EDITBIT)) (* let ↑Y read macro work instead)
(ADDNAKEDCHAR CHAR))
((GUESTUSER?)
(BEEP))
(T (SETTAIL?)
(SAVE.CURSOR)
(GO.TO.FREELINE)
(COND
(DRIBFL (* Make typescript understandable)
(AND \PROMPT1 (PRIN1 \PROMPT1 DRIBFL))
(PRINT (QUOTE ↑Y)
DRIBFL)))
(PRIN1 "lisp:
" T)
(COND
(TTYINMAILFLG (MWNOTE)))
(RESTOREMOD)
(PROG ((\INSIDE.TTYIN))
(USEREXEC (QUOTE ←←)))
(GO RETYPEBUFFER]
(0 (* ignore NULL))
((CHARCODE (↑A BS RUBOUT))
(TTDELETECHAR))
((CHARCODE (↑Q ↑U)) (* ↑Q delete line; ↑U on tops20)
(TTDELETELINE))
((CHARCODE ↑W) (* ↑W delete last word)
(TTDELETEWORD))
(COND
((EQ CHAR \TTYIN.RESTOREBUFCODE) (* Blank middle: restore buffer's previous contents.
\TTYIN.RESTOREBUFCODE is dynamic, since code on that key
may change)
(RESTOREBUF))
((IGREATERP CHAR 177Q) (* a funny char. I don't know how to handle)
(BEEP))
[(IGREATERP CHAR 40Q) (* not a control char)
(ADDCHAR (COND
(\RAISEINPUT (U-CASECODE CHAR))
(T CHAR]
(\READING (ADDNAKEDCHAR CHAR))
(T (* object to control chars)
(BEEP]
(GO CHAR)
RETYPEBUFFER
(SETQ \INSERTING)
(RETYPE.BUFFER \FIRSTLINE T T)
(GO CHAR)
DOCRLF
(* * Come here when it is time to terminate line)
(COND
((EQ (SETQ RESULT (TTYIN.FINISH CHAR DRIBFL RESULT))
(QUOTE ABORT)) (* Aborted, try again)
(GO PROMPT0))
(T (RETURN RESULT])
(TTYIN1RESTART
[LAMBDA NIL (* bvm: " 2-APR-82 14:19")
(\RESETLINE) (* clear some terminal-related stuff, including the info
about where to hold scroll)
(\SETEOFPTR \LINEBUF.OFD 0) (* Clear the line buffer)
(SETQ \ARROW (SETQ \FIRSTLINE (fetch FIRSTLINE of \TTYINSTATE)))
[replace END of \ARROW with (SETQ \CURSOR (SETQ \BUFFER (SETQ \ENDBUFFER (fetch START
of \ARROW]
[PROG ((MORELINES (fetch NEXTLINE of \ARROW)))
(COND
(MORELINES (* Return old line records to cons pool)
(replace NEXTLINE of \ARROW with NIL)
(KILL.LINES MORELINES]
(SETQ \INSERTING (SETQ \DELETING])
(TTYIN.FINISH
[LAMBDA (FINALCHAR DRIBFL RESULT) (* bvm: "24-Aug-84 17:40")
(PROG (WORD X ORIGBUFFER)
(SELECTQ (SYSTEMTYPE)
(TOPS20 (* Save this for funny tops20 check at end)
(SETQ \LASTCHAR FINALCHAR))
NIL)
(TTCRLF)
(CLEAR.LINE? T)
[COND
((EQ FINALCHAR (CHARCODE EOL))
(bind TAIL (START ←(fetch START of \ARROW))
while (AND (NEQ START \ENDBUFFER)
(EQ (CAR (SETQ TAIL (TTNLEFT \ENDBUFFER 1 START)))
(CHARCODE SPACE))
(NEQ (CAR (TTNLEFT TAIL 1 START))
(CHARCODE %%)))
do
(* Strip blanks, e.g., resulting from escape completion, so that Lispx does not do its silly ...
thing. Be careful not to strip a quoted space)
(SETQ \ENDBUFFER TAIL]
(COND
(DRIBFL (* print answer on typescript file)
(TTECHO.TO.FILE DRIBFL T)))
(for X inside ECHOTOFILE do (TTECHO.TO.FILE X))
(COND
[(EMPTY.BUFFER) (* blank line. RESULT is NIL unless set above by a read
macro)
(COND
((OR RESULT (EQ FINALCHAR (CHARCODE EOL)))
(SETLASTC (CHARCODE EOL))
(RETURN RESULT]
((EQ (CAR \BUFFER)
TTYINCOMMENTCHAR) (* comment)
(RETURN (QUOTE ABORT)))
((AND (EQ (CDR \BUFFER)
\ENDBUFFER)
(EQ (CAR \BUFFER)
(CHARCODE ?))
(OR HELP (AND \NOVALUE \REPEAT))) (* a bare ?)
(TTGIVEHELP (OR HELP "Terminate text with control-Z."))
(RETURN (QUOTE ABORT)))
(T (* Save last buffer position for posterity)
(replace OLDTAIL of \TTYINSTATE with \ENDBUFFER)))
[COND
[\READING (SELECTQ (SYSTEMTYPE)
[D (SETQ RESULT (if \FILLINGBUFFER
then (TTYIN.READ FINALCHAR T \LINEBUF.OFD)
else (TTYIN.READ FINALCHAR NIL (TTYIN.SCRATCHFILE]
(PROGN (* This is the old way)
(SETQ RESULT (TTREADLIST))
[COND
((NEQ \BUFFER \ENDBUFFER)
(* Line terminated with unbalanced right paren.
If there was only one thing on line, read the terminator
as a NIL)
[COND
((AND (EQ \READING (QUOTE EVALQT))
[NOT (CDR (SETQ X (COND
((EQ (CAR RESULT)
(QUOTE E))
(* A hack on a hack: this is probably the editor's E
command, and CDR is the real input)
(CDR RESULT))
(T RESULT]
(NLISTP (CAR X)))
(SETQ RESULT (NCONC1 RESULT NIL]
(SETQ \BUFFER (CDR \BUFFER))
(TTSKIPSEPR)
(while [AND (NEQ \BUFFER \ENDBUFFER)
(FMEMB (CAR \BUFFER)
(CHARCODE (%) %]]
do (SETQ \BUFFER (CDR \BUFFER)))
(* skip over any extra right parens or brackets)
(COND
((NEQ \BUFFER \ENDBUFFER)
(MOVE.TO.WHEREVER \BUFFER)
(* There was stuff after the read terminated, probably because user deleted or added a paren somewhere in the
middle. Probably didn't want to throw it away, so unread it so user can see it)
(TTUNREADBUF)
(TTCRLF]
(COND
((AND (EQ FINALCHAR (CHARCODE TENEXEOL))
(NOT (CDR RESULT))
(LISTP (CAR RESULT)))
(* User terminated with <cr>, but read a list.
Pretend he terminated with a "]" to be consistent with
lisp READ conventions)
(SETLASTC (CHARCODE %]]
(T
(SETQ ORIGBUFFER \BUFFER)
(SETQ WORD (TTRATOM))
[COND
((EQ (TTSKIPSEPR)
\ENDBUFFER) (* this was the only word in buffer)
(COND
((SELECTQ WORD
((? HELP) (* Only special if HELP provided)
(AND HELP (TTGIVEHELP HELP)))
NIL) (* special response handled; restart now)
(TERPRI T)
(RETURN (QUOTE ABORT]
[for RESPONSE in TTYINRESPONSES when (AND (EQMEMB WORD (CAR RESPONSE))
(OR (EQ \BUFFER \ENDBUFFER)
(CADDR RESPONSE)))
do
(* Process global user option. RESPONSE is a triple (commands response-form rest-of-line-arg); if user gives one
of the commands, the response form is evaluated with \COMMAND set to the command and LINE set to the remainder of
the line; the third component says how to compute LINE: as a STRING or as a LIST; if NIL, means there should be
nothing else on the line. If the response form returns the atom IGNORE, the input is not considered to be a
special response and the normal computation proceeds; otherwise it is assumed the response has been processed, and
we return to the original TTYIN prompt for more input. Response-form may be an atom, in which case it is APPLYed
to \COMMAND and LINE.)
(COND
((NEQ [PROG [(\COMMAND WORD)
(\BUFFER \BUFFER)
(LINE (COND
((EQ \BUFFER \ENDBUFFER)
NIL)
((EQ (CADDR RESPONSE)
(QUOTE STRING))
(TTYINSTRING \BUFFER))
(T (TTREADLIST]
(DECLARE (SPECVARS \COMMAND \BUFFER LINE))
(RETURN (COND
((LITATOM (CADR RESPONSE))
(APPLY* (CADR RESPONSE)
\COMMAND LINE))
(T (EVAL (CADR RESPONSE]
(QUOTE IGNORE))
(RETFROM (QUOTE TTYIN.FINISH)
(QUOTE ABORT)))
(T
(* That response was ignored. We could quit the iteration now, but continue in case there is another entry with
the same command. I.e. user can "redefine" special responses this way, but still let the old definition happen if
the input looks wrong)
]
[SETQ WORD (OR (TTADJUSTWORD WORD)
(RETURN (QUOTE ABORT]
[SETQ RESULT (COND
[(EQ \BUFFER \ENDBUFFER)
(COND
(\COMMAND (LIST WORD))
(\NOVALUE T)
(\STRINGVALUE
(* Can't just MKSTRING WORD here, since in the process of making the atom we might have changed something, e.g.
stripped leading zeros from a number, or changed radix)
(TTYINSTRING ORIGBUFFER))
(T (LIST WORD]
[\STRINGVALUE (COND
(\COMMAND (CONS WORD (TTYINSTRING \BUFFER)))
(T (TTYINSTRING ORIGBUFFER]
(\NOVALUE (COND
(\COMMAND (CONS WORD T))
(T T)))
(T (bind NEXTWORD while (NEQ (TTSKIPSEPR)
\ENDBUFFER)
collect (SETQ NEXTWORD (TTRATOM)) (* go back for more)
[COND
(\COMMAND (* only check first word typed)
NEXTWORD)
((TTADJUSTWORD NEXTWORD))
(T (RETURN (QUOTE ABORT]
finally (RETURN (CONS WORD $$VAL]
(SETLASTC FINALCHAR)
(PROGN (* All this nonsense is just to convince prettyprint to
keep the indentation down to a reasonable amount)
(PROGN
(PROGN
(PROGN
(PROGN
(PROGN
(PROGN
(PROGN (PROGN (PROGN (PROGN (PROGN (PROGN (PROGN (PROGN (PROGN NIL]
(* * We have now processed the line, with the relevant value being RESULT...)
[COND
((AND TTYINUSERFN (LISTP RESULT))
(COND
((EQ (SETQ X (APPLY* TTYINUSERFN RESULT))
T) (* Special response has been processed;
try again)
(RETURN (QUOTE ABORT)))
(X (* this is what we should return)
(RETURN X]
(SETQ \CURRENTDISPLAYLINE 0) (* get scrolling right (again))
(* see system \CLOSELINE)
(RETURN RESULT])
(TTYIN.READ
[LAMBDA (FINALCHAR DONTREAD STREAM) (* bvm: "24-Aug-84 17:33")
(PROG (LASTC HERE)
(* (COND ((NOT DONTREAD) (* We are doing our own READ, so surround user's input with parens before we stuff it
away) (\BOUT STREAM (CHARCODE %[)))))
(while (NEQ \BUFFER \ENDBUFFER)
do [\BOUT STREAM (SETQ LASTC (REALBITS (CAR \BUFFER]
(SETQ \BUFFER (TTNEXTCHAR \BUFFER))) (* Fill the buffer)
(COND
[(NOT DONTREAD) (* (\BOUT STREAM (CHARCODE %])))
(* Close with two right brackets: one may be needed to
match a user open bracket, the other matches ours)
(* (\BOUT STREAM (CHARCODE %])))
]
((SELCHARQ FINALCHAR
(EOL (SELCHARQ LASTC
((%) %])
(COND
((ILESSP (SETQ HERE (\GETFILEPTR STREAM))
2))
((EQ (PROGN (\SETFILEPTR STREAM (IDIFFERENCE HERE 2))
(\BIN STREAM))
(CHARCODE %%))
(* If it ended in a quoted right paren, then it's just
like any other character)
(\BIN STREAM))
(T (* Line ended in paren. Change to right bracket so
READLINE doesn't get confused)
(\BOUT STREAM (CHARCODE %]))
NIL)))
T))
((%) %])
NIL)
T)
(\BOUT STREAM FINALCHAR)))
(\SETEOFPTR STREAM (\GETFILEPTR STREAM))
(\SETFILEPTR STREAM 0)
(RETURN (COND
(DONTREAD (* STREAM = \LINEBUF.OFD and caller will take care of
reading buf)
(AND (EQ STREAM \LINEBUF.OFD)
(replace (LINEBUFFER LINEBUFSTATE) of STREAM with READING.LBS))
T)
(T (* Read from buffer until it's empty)
(PROG1 (bind TERM while [AND (SKIPSEPRS STREAM RDTBL)
(SETQ TERM (NLSETQ (READ STREAM RDTBL]
collect (CAR TERM))
(\SETFILEPTR STREAM 0) (* Now clear the stream so nobody reads extra garbage
after us)
(\SETEOFPTR STREAM 0])
(TTYIN.BALANCE
[LAMBDA NIL (* bvm: "23-MAR-82 23:09")
(PROG ((X (TTSKREAD \BUFFER)))
(RETURN (PROG1 [OR (EQ X \ENDBUFFER)
(AND (EQ (CAR X)
(CHARCODE %]))
(AT.END.OF.TEXT (CDR X]
(MOVE.TO.WHEREVER (OR X \ENDBUFFER])
(ADDCHAR
[LAMBDA (CHAR)
(DECLARE (USEDFREE \ARROW \CURSORCOL \AUTOFILL \CURSOR))
(* bvm: " 1-JUN-82 22:39")
(* * Add CHAR to buffer and print it, advancing cursor position appropriately)
(PROG ((WIDTH (TTBITWIDTH CHAR)))
(END.DELETE.MODE)
[COND
((AT.END.OF.LINE)
(OVERFLOW? WIDTH)
(TTBOUT CHAR)
(INSERT.CHAR.IN.BUF CHAR) (* i.e. inserting at end of line)
(add \CURSORCOL WIDTH)
(replace LASTCOL of \ARROW with \CURSORCOL))
[(INSERTING)
(INSERTNCHARS 1 CHAR)
(INSERT.CHAR.IN.BUF CHAR) (* Wedge char into the buffer, and advance the final
column)
(add \CURSORCOL WIDTH)
(PROG ((OVFL (IDIFFERENCE (add (fetch LASTCOL of \ARROW)
WIDTH)
\RMARG)))
(COND
((OR (IGREATERP OVFL 0)
(AND (ZEROP OVFL)
\AUTOFILL))
(ADJUSTLINE (AND \AUTOFILL 1))
(MOVE.TO.WHEREVER \CURSOR]
(T [COND
((PREFIXCHAR (CAR \CURSOR)) (* Overwriting a multi-position char, so need to flush
the extra garbage)
(SELCHARQ (REALBITS (CAR \CURSOR))
[(TAB SPACE) (* tab or pseudo-tab: change the padding spaces to
ordinary spaces)
(KILLSEGMENT \CURSOR (CDR \CURSOR))
(* flush the tab itself, leaving only its spaces)
(for (BUF ← \CURSOR) by (CDR BUF) while (EQ (CAR BUF)
(PADCHARCODE SPACE))
do (FRPLACA BUF (CHARCODE SPACE]
(PROGN (* Delete all but one of the printing chars)
(FORWARD.DELETE.TO (NLEFT \CURSOR 1 (TTNEXTCHAR \CURSOR]
(TTBOUT CHAR)
(add \CURSORCOL WIDTH)
(FRPLACA \CURSOR CHAR)
(SETQ \CURSOR (CDR \CURSOR]
(OVERFLOW? 0)
NIL])
(ADDCHARS.INSERTING
[LAMBDA (N CHAR) (* bvm: " 1-JUN-82 22:49")
(* * Inserts CHAR N times. Works independent of setting of \INSERTING)
(PROG [(WIDTH (ITIMES N (TTBITWIDTH CHAR]
(OVERFLOW? WIDTH)
(COND
((AT.END.OF.LINE)
(TTBOUTN N CHAR))
(T (INSERTNCHARS N CHAR)))
(FRPTQ N (INSERT.CHAR.IN.BUF CHAR))
(add \CURSORCOL WIDTH)
(* * Now clean up any resulting overflow. Could have done this character by character in ADDCHAR, but if N gt 1
that can be slow.)
(COND
((IGREATERP (replace LASTCOL of \ARROW with (IPLUS WIDTH (fetch LASTCOL of \ARROW)))
\RMARG)
(ADJUSTLINE.AND.RESTORE))
(T (OVERFLOW? 0])
(ADDNAKEDCHAR
[LAMBDA (CHAR NOAUTOFILL) (* bvm: "20-FEB-82 22:34")
(* * Adds CHAR with no special processing, e.g. most control chars (except cr and lf, which I can't figure out
yet) go thru ok.)
(COND
((AND (IGREATERP CHAR 40Q)
(NEQ CHAR 177Q))
(ADDCHAR CHAR))
(T (SELCHARQ CHAR
[CR (* CR can be attempted if at end)
(COND
((AT.END.OF.BUF)
(START.NEW.LINE EOLCHARCODE))
(T (BEEP]
[SPACE (OR (AND (NOT NOAUTOFILL)
(AUTOCR?))
(ADDCHAR (CHARCODE SPACE]
(ESCAPE (INSERT.CHAR.IN.BUF (PREFIXCHARCODE ESCAPE))
(* Altmode will echo as $)
(ADDCHAR (PADCHARCODE $)))
(TAB (ADDTAB))
(PROGN (OVERFLOW? 1)
(INSERT.CHAR.IN.BUF (LOGOR CHAR (CONSTANT PREFIXCODE)))
(* Insert naked char with prefix bit)
(ADDCHAR (PADCHARCODE ↑))
(ADDCHARS.INSERTING 1 (COND
((EQ CHAR (CHARCODE DEL))
(* DELETE is represented as ↑?)
(PADCHARCODE ?))
(T (LOGOR CHAR 100Q (CONSTANT PADCODE])
(ADDSILENTCHAR
[LAMBDA (CHAR) (* bvm: " 1-JUN-82 18:22")
(* Like ADDCHAR, but doesn't echo the char, assuming that echoing has already been done. Assumes we are at end of
line so we don't have to do any messiness)
(COND
[(ILESSP CHAR (CHARCODE SPACE)) (* bleah. do a control char. The line is probably
screwed up, but at least let ↑R do the right thing)
(INSERT.CHAR.IN.BUF (LOGOR CHAR (CONSTANT PREFIXCODE)))
(* Prefix bit on)
(COND
((EQ CHAR (CHARCODE ESCAPE))
(INSERT.CHAR.IN.BUF (PADCHARCODE $)))
(T (INSERT.CHAR.IN.BUF (PADCHARCODE ↑))
(INSERT.CHAR.IN.BUF (LOGOR (SETQ CHAR (LOGOR CHAR 100Q))
(CONSTANT PADCODE)))
(* controlified letter)
(ADD1POS (CHARCODE ↑]
(T (INSERT.CHAR.IN.BUF CHAR)))
(ADD1POS CHAR)
(COND
((NOT (ILESSP (replace LASTCOL of \ARROW with \CURSORCOL)
\RMARG))
(START.NEW.LINE)))
NIL])
(ADDTAB
[LAMBDA NIL (* bvm: " 1-JUN-82 22:49")
(COND
((AND (NOT (AT.END.OF.BUF))
(NOT \INSERTING)
(EQ (CAR \CURSOR)
(PREFIXCHARCODE TAB))) (* We're on a tab. Unless we're explicitly inserting,
just move cursor over it)
(MOVE.FORWARD.TO (TTNEXTCHAR \CURSOR)))
(T
(* Represent <tab> in buffer as a tab with 200Q bit on, followed by the appropriate number of spaces, each with
400Q bit on. Tab is always self-inserting, i.e. it never overwrites anything (except itself, as above))
(INSERT.CHAR.IN.BUF (PREFIXCHARCODE TAB)) (* the actual tab)
(ADDCHARS.INSERTING (IDIFFERENCE 10Q (LOGAND (IQUOTIENT (IDIFFERENCE \CURSORCOL
(fetch FIRSTCOL
of \ARROW))
\CHARWIDTH)
7))
(PADCHARCODE SPACE])
(ADJUSTLINE
[LAMBDA (JUSTIFYING LINE) (* bvm: " 1-JUN-82 22:08")
(* Handles patching up lines that are too long or short. Assures that the current line, ARROW, is correct with
regard to overflows. If JUSTIFYING is true, it is a number specifying how many lines to "justify", by which we
mean moving text around so that each line has as many words as possible for the linelength, but does not overflow.
We don't do anything very fancy with that, like take care of deleting extra spaces.)
(PROG [#BITS BREAK LASTCOL NEWENDLINE NEXTLINE OLDENDLINE OVFL START USECR ROW
(IDEALLENGTH (COND
((IGREATERP TTYJUSTLENGTH 0)
(IMIN \RMARG (ITIMES TTYJUSTLENGTH \CHARWIDTH)))
(T (* Relative to right margin)
(IMAX (IDIFFERENCE \RMARG (ITIMES (IMINUS TTYJUSTLENGTH)
\CHARWIDTH))
(LRSH \RMARG 1]
(OR LINE (SETQ LINE \ARROW))
(SETQ ROW (fetch ROW of LINE))
LP (SETQ NEXTLINE (fetch NEXTLINE of LINE))
(SETQ OVFL (OVERFLOWLINE? LINE))
(SETQ #BITS (IDIFFERENCE \RMARG (fetch LASTCOL of LINE)))
(SETQ USECR (SETQ BREAK NIL))
(SETQ START (fetch START of LINE))
(COND
((ILESSP #BITS 0)
(* Too much on line; need to break it somewhere, preferably at a space if permissible. If justifying, try to break
at the appropriate length)
(COND
([OR (AND JUSTIFYING (ILESSP (IPLUS (fetch FIRSTCOL of LINE)
IDEALLENGTH)
\RMARG)
(SETQ BREAK (FIND.LINE.BREAK START (NTH.RELATIVE.COLUMN.OF LINE IDEALLENGTH)
T)))
(PROGN (SETQ NEWENDLINE (NTH.COLUMN.OF LINE \RMARG))
(AND (OR JUSTIFYING \AUTOFILL)
(SETQ BREAK (FIND.LINE.BREAK START NEWENDLINE T]
(SETQ USECR T))
(T (SETQ BREAK NEWENDLINE)))
(GO DOBREAK))
[(AND OVFL (NEQ #BITS 0)
(NEQ (SETQ NEWENDLINE (NTH.RELATIVE.COLUMN.OF NEXTLINE #BITS))
(fetch START of NEXTLINE)))
(* Line is too short, but is an overflow line, so text MUST be moved to fill the gap; alternatively, if we are
justifying, we could break the line sooner)
(* NEWENDLINE = where the line should end, based on
linelength)
(COND
([OR (EQ (fetch END of LINE)
NEWENDLINE)
(AND (OR \AUTOFILL JUSTIFYING)
(SETQ BREAK (FIND.LINE.BREAK (fetch END of LINE)
NEWENDLINE JUSTIFYING))
(SETQ NEWENDLINE BREAK))
(NOT JUSTIFYING)
(NOT (SETQ BREAK (FIND.LINE.BREAK START (fetch END of LINE)
T]
(GO DOJOIN))
(T (SETQ USECR T)
(GO DOBREAK]
((NOT JUSTIFYING)
(RETURN))
[(OR OVFL (AND (NEQ JUSTIFYING T)
(IGREATERP (IDIFFERENCE (fetch LASTCOL of LINE)
(fetch FIRSTCOL of LINE))
IDEALLENGTH))) (* line is longer than we'd like)
(COND
((SETQ BREAK (FIND.LINE.BREAK START (NTH.RELATIVE.COLUMN.OF LINE IDEALLENGTH)
T))
(SETQ USECR T)
(GO DOBREAK]
[(AND (NOT (EMPTY.LINE LINE))
(NOT (START.OF.PARAGRAPH? NEXTLINE))
(OR (NEQ JUSTIFYING T)
(EQ (CAR (fetch END of LINE))
PSEUDOCRCODE))) (* Don't move up text from next line if it is blank or
starts with tab -- treat those as paragraph breaks)
(COND
((OR (EQ [SETQ BREAK (NTH.RELATIVE.COLUMN.OF
NEXTLINE
(SUB1 (IMIN (IDIFFERENCE (IPLUS IDEALLENGTH (fetch FIRSTCOL
of LINE))
(fetch LASTCOL of LINE))
#BITS]
(fetch END of NEXTLINE))
(SETQ BREAK (FIND.LINE.BREAK (fetch START of NEXTLINE)
BREAK T)))
(SETQ NEWENDLINE BREAK) (* At least one more word from next line will fit up
here)
(GO DOJOIN))
(T (* No text movement, but if there was a real <cr>, make
it pseudo now)
(FRPLACA (fetch END of LINE)
(CONSTANT PSEUDOCRCODE]
((EQ JUSTIFYING T) (* If this line is fine, quit)
))
(SETQ LINE NEXTLINE)
(GO BOTTOM)
DOJOIN
(* * Move text from next line up to this one. NEWENDLINE is where line should end when done.
BREAK=NEWENDLINE if this new end line is a pseudo-cr break)
(COND
((EQ (SETQ OLDENDLINE (fetch END of LINE))
NEWENDLINE)
(SETQ #BITS 0))
(T (GO.TO.RELATIVE (fetch LASTCOL of LINE)
ROW)
(SETQ #BITS (SEGMENT.BIT.LENGTH OLDENDLINE NEWENDLINE))
(* # chars to delete from next line)
[COND
((NOT OVFL) (* Joining toa non-overflow line: turn its cr into a
space)
(FRPLACA OLDENDLINE (CHARCODE SPACE))
(while (AND (NEQ (CDR OLDENDLINE)
NEWENDLINE)
(EQ (CADR OLDENDLINE)
(CHARCODE SPACE)))
do (* strip leading spaces from next line)
(KILLSEGMENT OLDENDLINE (CDR OLDENDLINE)))
(COND
((EQ (CAR (NLEFT (fetch START of LINE)
1 OLDENDLINE))
(CHARCODE %.)) (* LINE ends in period, so space twice)
(FRPLACA (INSERT.NODE OLDENDLINE)
(CHARCODE SPACE]
(TYPE.BUFFER OLDENDLINE NEWENDLINE)
(replace END of LINE with NEWENDLINE)
(replace LASTCOL of LINE with \CURSORCOL)))
(GO.TO.RELATIVE (QUOTE LINE)
NEXTLINE)
(replace START of NEXTLINE with (COND
(BREAK (FRPLACA BREAK (CONSTANT PSEUDOCRCODE))
(* Turn BREAK's space into a pseudo-cr, if anyone cares)
(COND
(OVFL (add #BITS (TTBITWIDTH (CHARCODE SPACE)))
(* will delete space also)
))
(CDR NEWENDLINE))
(T NEWENDLINE)))
(COND
((EQ (fetch END of NEXTLINE)
NEWENDLINE)
(DELETELINE NEXTLINE T) (* Nothing left here, so kill it)
[COND
(JUSTIFYING (* maybe we can move from next line, too)
(COND
([AND (NEQ JUSTIFYING T)
(NOT (ZEROP (SUB1VAR JUSTIFYING]
(GO LP))
(T (RETURN]
(SETQ LINE (fetch NEXTLINE of LINE)))
(T (TTDELSECTION #BITS)
(replace LASTCOL of NEXTLINE with (IDIFFERENCE (fetch LASTCOL of NEXTLINE)
#BITS))
(SETQ LINE NEXTLINE)))
(GO BOTTOM)
DOBREAK
(* Break line at BREAK, moving excess down to next line or a new line. USECR is true if break is a cr break;
otherwise we are breaking a too-long line at the right margin)
[replace LASTCOL of LINE with (SETQ LASTCOL (IPLUS (SEGMENT.BIT.LENGTH (fetch START
of LINE)
BREAK)
(fetch FIRSTCOL of LINE]
(* Column where break will occur)
[SETQ #BITS (SEGMENT.BIT.LENGTH BREAK (SETQ OLDENDLINE (fetch END of LINE]
(* length of segment being moved)
(COND
((NEQ LASTCOL \RMARG)
(GO.TO.RELATIVE LASTCOL ROW) (* Go wipe out what was there.
Don't need to do this if the break is right at the
margin)
(ERASE.TO.END.OF.LINE)))
(replace END of LINE with BREAK)
[COND
(USECR (FRPLACA BREAK (CONSTANT PSEUDOCRCODE)) (* Turn break space into pseudo-cr.
Of course, that means we have counted one char too many
above...)
[SETQ #BITS (IDIFFERENCE #BITS (TTBITWIDTH (CHARCODE SPACE]
(SETQ BREAK (CDR BREAK]
(COND
[[AND NEXTLINE (OR OVFL (AND (OR JUSTIFYING (AND (EQ (CAR OLDENDLINE)
(CONSTANT PSEUDOCRCODE))
(ILESSP (IPLUS (fetch LASTCOL
of NEXTLINE)
#BITS)
\RMARG)))
(NOT (START.OF.PARAGRAPH? NEXTLINE]
(* Insert the text on the next line, rather than starting new line, if justifying, overflow
(forced), or the text will fit, i.e. not cause anything to be bumped off the next line)
(GO.TO.RELATIVE (QUOTE LINE)
(SETQ LINE NEXTLINE))
(COND
((NOT OVFL) (* Turn the terminating <cr> into ordinary space;
this space also needs to be inserted and counted, of
course)
(add #BITS (TTBITWIDTH (CHARCODE SPACE)))
(SETQ OLDENDLINE (CDR (FRPLACA OLDENDLINE (CHARCODE SPACE]
(T (SETQ LINE (INSERTLINE LINE))
(replace END of LINE with OLDENDLINE)))
(replace START of LINE with BREAK)
(INSERT.TEXT BREAK OLDENDLINE (fetch END of LINE))
(add (fetch LASTCOL of LINE)
#BITS)
BOTTOM
(COND
(LINE (ADD1VAR ROW)
(COND
((AND JUSTIFYING (NEQ JUSTIFYING T)
(ZEROP (SUB1VAR JUSTIFYING)))
(SETQ JUSTIFYING NIL)))
(GO LP])
(ADJUSTLINE.AND.RESTORE
[LAMBDA (JUSTIFYING) (* bvm: "19-MAR-81 11:55")
(SAVE.CURSOR)
(ADJUSTLINE JUSTIFYING)
(COND
((IGREATERP \HOMECOL (fetch LASTCOL of \ARROW))
(* Oops, cursor must have moved)
(MOVE.TO.WHEREVER \CURSOR))
(T (RESTORE.CURSOR])
(AT.END.OF.SCREEN
[LAMBDA NIL (* bvm: " 1-JUN-82 18:09")
(OR (AT.END.OF.LINE)
(IGREATERP (IPLUS \CURSORCOL (TTBITWIDTH (REALBITS (CAR \CURSOR)))
\CHARWIDTH)
\RMARG])
(AT.END.OF.TEXT
[LAMBDA (BUF) (* bvm: "19-MAR-81 11:55")
(* Checks that this is the last printing char in buffer. Fancier than just checking that BUF = ENDBUFFER, since that
would mess up if user deletes a line and decides to terminate on previous line)
(for X←BUF by (CDR X) until (EQ X \ENDBUFFER) always (SPACEP (CAR X])
(AUTOCR?
[LAMBDA NIL (* bvm: " 4-JUN-82 13:59")
(* Terminates line if near edge of screen and in
autofill mode)
(COND
((AND \AUTOFILL (IGREATERP (IPLUS \CURSORCOL TTYINAUTOFILLMARGIN)
\RMARG))
[COND
((AT.END.OF.LINE)
(START.NEW.LINE (CONSTANT PSEUDOCRCODE)))
(T (BREAKLINE (CONSTANT PSEUDOCRCODE]
T])
(BACKSKREAD
[LAMBDA (BUF NOTIFQUOTED) (* bvm: "20-FEB-82 22:36")
(* Returns buffer position of start of list containing cursor position BUF, or start of buffer.
If NOTIFQUOTED is true, then returns NIL if the paren/bracket at BUF is quoted with the escape char or is inside a
string. Strategy: start at beginning of buffer and TTSKREAD forward (much easier); if read ends at BUF, we win;
if ends before BUF, then resume reading there (we skipped an internal list); otherwise if read did not end, BUF
must be inside a list, so scan ahead for start of an inner list, and repeat)
(PROG ((B \BUFFER)
(INNERMOSTLIST \BUFFER)
BRACKETFLG X)
LP (COND
((EQ B BUF) (* No list in buffer at all)
(RETURN INNERMOSTLIST)))
(SELCHARQ (CAR B)
[(%( %[) (* open paren or bracket. Try scanning this new internal
list)
(COND
((EQ (SETQ X (TTSKREAD (CDR B)
BUF))
BUF)
(RETURN (OR BRACKETFLG B)))
(X (* Skip over internal list just scanned)
(SETQ B X))
(T
(* The TTSKREAD failed, so BUF must be at least this deeply nested. Save pointer here in case we abort inside a
string or such)
(SETQ INNERMOSTLIST B)
(COND
((AND (EQ (CAR B)
(CHARCODE %[))
(EQ (CAR BUF)
(CHARCODE %]))) (* Brackets may match; save position of this open
bracket. Otherwise we'll return the innermost list,
rather than the start of the bracket expression)
(SETQ BRACKETFLG B]
[%% (* % to quote the next char)
(COND
((EQ (CDR B)
BUF) (* The char at BUF is quoted.
This is why TTSKREAD failed here.
Just return the list we're now inside)
(RETURN (AND (NOT NOTIFQUOTED)
INNERMOSTLIST)))
(T (* skip over escape char)
(SETQ B (CDR B]
[%" (* double-quote)
(COND
((NOT (SETQ B (FIND.MATCHING.QUOTE (CDR B)
BUF)))
(* Termination analogous to previous case)
(RETURN (AND (NOT NOTIFQUOTED)
INNERMOSTLIST]
NIL)
(SETQ B (CDR B))
(GO LP])
(BACKWARD.DELETE.TO
[LAMBDA (BUF) (* bvm: "19-MAR-81 11:55")
(FORWARD.DELETE.TO (PROG1 \CURSOR (MOVE.BACK.TO BUF])
(BREAKLINE
[LAMBDA (USECR STAY)
(DECLARE (USEDFREE \CURSOR \ARROW \CURSORCOL \CURSOR)) (* bvm: "16-SEP-82 11:52")
(* * Break current line at \CURSOR position, inserting a suitable <cr> if USECR is given. If STAY is true, \CURSOR
does not move; otherwise cursor moves to first position of new line.)
(PROG ((OLDLINE \ARROW)
(OLDEND (fetch END of \ARROW)))
(replace END of \ARROW with \CURSOR) (* terminate current line at \CURSOR position)
(replace LASTCOL of \ARROW with \CURSORCOL)
(ERASE.TO.END.OF.LINE)
(COND
(STAY (SAVE.CURSOR)))
(SETQ \ARROW (INSERTLINE \ARROW USECR))
(COND
((NOT STAY)
(SAVE.CURSOR)))
(replace END of \ARROW with OLDEND)
[COND
[(EQ \CURSOR OLDEND) (* cr was inserted at end of line.
Maybe this never happens)
(replace END of \ARROW with (SETQ \CURSOR (CDR OLDEND]
(T (TYPE.BUFFER (SETQ \CURSOR (fetch START of \ARROW))
OLDEND) (* Restore to screen what we erased above)
(replace LASTCOL of \ARROW with \CURSORCOL)
(COND
((OVERFLOWLINE? \ARROW) (* the previous line overflowed, but when we inserted a
cr we added more space on the line, so go fix it up)
(ADJUSTLINE]
[COND
(STAY (* Oh well, undo what we did to poor \CURSOR)
(SETQ \CURSOR (fetch END of (SETQ \ARROW OLDLINE]
(RESTORE.CURSOR])
(BUFCHARCOUNT
[LAMBDA (BUF TAIL PRIN2CNT) (* bvm: "20-FEB-82 22:34")
(* returns the number of real chars from BUF to TAIL. If PRIN2CNT is true, pays attention to
(i.e. does not count) the escape char (%%))
(for X←BUF by (TTNEXTCHAR X) until (EQ X TAIL) sum [COND
((AND PRIN2CNT (EQ (CAR X)
(CHARCODE %%)))
(* % to quote next char)
(SETQ X (CDR X]
1])
(BUFTAILP
[LAMBDA (TAIL START END) (* bvm: "23-JUN-81 15:48")
(do (COND
((EQ TAIL START)
(RETURN TAIL))
((OR (NOT START)
(EQ START END))
(RETURN)))
(SETQ START (CDR START])
(CHECK.MARGIN
[LAMBDA (BUF LINE) (* bvm: " 1-JUN-82 17:09")
(* * If BUF is the pseudo-cr at the end of this LINE, then back it up one, since you can't let the cursor sit on
it)
(COND
((AND (EQ (fetch END of LINE)
BUF)
(OR (EQ (fetch LASTCOL of LINE)
\RMARG)
(EQ (fetch START of (fetch NEXTLINE of LINE))
BUF)))
(TTNLEFT BUF 1 (fetch START of LINE)))
(T BUF])
(CLEAR.LINE?
[LAMBDA (FLG) (* bvm: "15-JUN-82 17:49")
(* If FLG true, erase lots)
(COND
((CAPABILITY? ERASE.TO.END)
(COND
(FLG (ERASE.TO.END.OF.PAGE))
(T (ERASE.TO.END.OF.LINE])
(CREATE.LINE
[LAMBDA (START END COL1 LASTCOL ROW NEXT) (* bvm: " 1-JUN-82 18:45")
(FRPLNODE (SCRATCHCONS)
START
(FRPLNODE (SCRATCHCONS)
END
(FRPLNODE (SCRATCHCONS)
COL1
(FRPLNODE (SCRATCHCONS)
LASTCOL
(FRPLNODE (SCRATCHCONS)
ROW NEXT])
(CURRENT.WORD
[LAMBDA NIL (* bvm: " 5-SEP-83 18:21")
(* Used by word-completion routines. Returns position in buffer of the start of the current word, or NIL if no
word is in progress, or \COMMAND is true and this is not the first word, or the line is a comment)
(COND
((AND (NOT (AT.START.OF.LINE))
(NEQ (CAR (fetch START of \ARROW))
(CHARCODE ;)))
(for (X ←(fetch START of \ARROW)) by (CDR X) until (EQ X \CURSOR) bind NEW←T
do (* NEW is true after we scan a break character)
[SELECTC (REALBITS (CAR X))
(SEPRCODES (* mark that we've seen this space)
(SETQ NEW T))
(BREAKCODES (SETQ NEW T)
(SETQ $$VAL X))
(COND
(NEW (* This is the start of a new word;
note it)
(COND
((AND $$VAL \COMMAND) (* Means this is second word)
(RETURN)))
(SETQ $$VAL X)
(SETQ NEW NIL]
finally (RETURN (COND
((AND (NOT NEW)
(OR (NOT \READING)
[NOT (FMEMB (CAR $$VAL)
(CHARCODE (%" ' ↑Y]
(NEQ (SETQ $$VAL (CDR $$VAL))
\CURSOR)))
(* Start of word seen, and not yet ended. Check for starting ' or %" in a list input, since those probably don't
start this word, i.e. atom)
$$VAL])
(DELETE.TO.END
[LAMBDA NIL (* bvm: "19-MAR-81 11:56")
(* * Kills buffer from \CURSOR onward)
(SETTAIL? T)
(COND
(DISPLAYTERMFLG (ERASE.TO.END.OF.PAGE)))
(COND
((fetch NEXTLINE of \ARROW) (* There are lines after this, so return them to garbage
heap)
(KILL.LINES (fetch NEXTLINE of \ARROW))
(replace NEXTLINE of \ARROW with NIL)))
(replace END of \ARROW with (SETQ \ENDBUFFER \CURSOR))
(replace LASTCOL of \ARROW with \CURSORCOL])
(DELETELINE
[LAMBDA (LINE EMPTYLINE?) (* bvm: "20-FEB-82 22:20")
(* Deletes this LINE from buffer and screen; assumes cursor is currently positioned somewhere on the line.
EMPTYLINE? is true on calls from ADJUSTLINE where the line is naked and hence no text in the buffer needs to be
killed.)
(PROG ((NEXTLINE (fetch NEXTLINE of LINE))
OLDSTART NEWSTART PREVLINE)
[COND
((AND (EQ LINE \ARROW)
(ON.FIRST.LINE))
(COND
((NOT NEXTLINE) (* Can't delete the only line)
(RETURN (BEEP)))
((NEQ \PROMPT1 \PROMPT2) (* tricky to delete first line, since the correct prompt
should be displayed)
(MOVE.BACK.TO \BUFFER)
(RETURN (FORWARD.DELETE.TO (fetch END of \ARROW]
(COND
(DISPLAYTERMFLG (DO.DELETE.LINES 1)))
(RENUMBER.LINES NEXTLINE (fetch ROW of LINE))
(replace NEXTLINE of (SETQ PREVLINE (PREVLINE LINE 1)) with NEXTLINE)
[COND
((NOT NEXTLINE) (* deleting last line: need to worry about \ENDBUFFER
and such)
(SETQ \ENDBUFFER (fetch END of PREVLINE)))
(T (replace NEXTLINE of LINE with NIL) (* in preparation for KILL.LINES below)
(COND
((NOT EMPTYLINE?)
(KILLSEGMENT (SETQ OLDSTART (fetch START of LINE))
(SETQ NEWSTART (fetch START of NEXTLINE)))
(* flush anything on the line.
PREVLINE pointers remain valid)
(COND
((EQ (fetch END of NEXTLINE)
NEWSTART)
(replace END of NEXTLINE with OLDSTART)))
(replace START of NEXTLINE with OLDSTART]
(KILL.LINES LINE) (* return to heap)
(COND
((EQ \ARROW LINE) (* if this is our home position, adjust appropriately)
(SETQ \ARROW (SETQ LINE (OR NEXTLINE PREVLINE)))
(SETQ \CURSOR (fetch START of LINE))
(GO.TO.RELATIVE (QUOTE LINE)
LINE])
(DELETETO
[LAMBDA (TAIL) (* bvm: " 6-OCT-83 15:33")
(SETTAIL?)
(COND
((NEQ \CURSOR \ENDBUFFER) (* On other terminals also when Cursor capable)
(BACKWARD.DELETE.TO TAIL))
(T [COND
[(NOT DISPLAYTERMFLG)
(COND
((NOT \DELETING) (* prefix deletions with backslash)
(COND
((NOT TTYINBSFLG) (* unless we are going to physically backspace)
(TTBOUT \)))
(SETQ \DELETING 0)))
(DELETETO1 TAIL)
(COND
((EQ TAIL \BUFFER)
(END.DELETE.MODE]
(T (PROG ((N (SEGMENT.BIT.LENGTH TAIL \ENDBUFFER)))
(* need to kill the previous N chars)
(* (COND ((CAPABILITY? ERASE.TO.END T) (* Ah, all we need do is go back N and erase to end)
(DO.BACK N) (ERASE.TO.END.OF.LINE)) (T (* laborious technique for glass ttys: go back and wipe out each char one
at a time) (FRPTQ N (PROGN (DO.BACK 1) (* back up) (TTBOUT SPACE) (* overwrite with space)
(DO.BACK 1) (* and back up again))))))
(DSPBACKUP N \DSP)
(SETQ \CURSORCOL (IDIFFERENCE \CURSORCOL N]
(replace END of \ARROW with (SETQ \CURSOR (SETQ \ENDBUFFER TAIL)))
(replace LASTCOL of \ARROW with \CURSORCOL])
(DELETETO1
[LAMBDA (TAIL) (* bvm: " 1-JUN-82 18:27")
(* * Not used in Interlisp-D)
(* * on non-DMs: delete chars until we reach TAIL; since we echo deleted chars in reverse order, this is most
easily done recursively)
[COND
((NEQ (CDR TAIL)
\ENDBUFFER)
(DELETETO1 (CDR TAIL]
[COND
((NOT (PREFIXCHAR (CAR TAIL)))
(SELECTQ TTYINBSFLG
(NIL (TTBOUT (CAR TAIL)))
(LF
(* physically backspace, crossing out character. LF means we will do a LF when ENDELETE happens.
If we don't LF, then best not to cross out chars)
(TTBOUT BS \ BS)
(ADD1VAR \DELETING))
(TTBOUT BS] (* echo deleted char)
(SETQ \CURSORCOL (SUB1 \CURSORCOL])
(DO.EDIT.COMMAND
[LAMBDA (CHAR EDITARG) (* bvm: "15-JUN-82 16:51")
(* * Handles the various edit commands, which mostly move the cursor around in the buffer, or kill pieces of it.
CHAR is the character stripped of its editbit. EDITARG is the argument, if any (not set by type-in, but by program
asking for a particular edit function). If this routine returns something, it means process it like ordinary
character (this is how we can invoke non-editbit routines))
(PROG (EDITMINUS L X LASTSKIP)
[COND
((NOT EDITARG)
(SETQ EDITARG 1))
((MINUSP EDITARG)
(SETQ EDITMINUS T)
(SETQ EDITARG (IABS EDITARG]
LP [SELCHARQ (SETQ CHAR (U-CASECODE CHAR))
[CR
(* <edit>CR on empty buffer means get back last buffer; in the middle of a buffer it is the same as normal CR, but
also ends insert mode)
(COND
((EMPTY.BUFFER)
(RESTOREBUF))
((ON.LAST.LINE)
(RETURN CHAR))
(T (MOVE.TO.LINE (TTNEXTLINE \ARROW EDITARG]
[(SPACE >) (* move right)
(COND
(EDITMINUS (SETQ CHAR (CHARCODE DEL))
(* backward space is delete)
(GO NOMINUS))
((AT.END.OF.BUF)
(BEEP))
((AT.END.OF.SCREEN)
(MOVE.TO.NEXT.LINE))
(T (MOVE.FORWARD.TO (TTNTH \CURSOR EDITARG]
[(DEL ↑A BS <) (* back up)
(COND
(EDITMINUS (SETQ CHAR (CHARCODE SPACE))
(* backward delete is space)
(GO NOMINUS))
((AT.START.OF.BUF)
(BEEP))
((AT.START.OF.LINE)
(MOVE.TO.LINE (SETQ X (PREVLINE \ARROW 1))
(fetch END of X)))
(T (MOVE.BACK.TO (TTNLEFT \CURSOR EDITARG]
[%( (* backs up one word)
(COND
(EDITMINUS (SETQ CHAR (CHARCODE %)))
(GO NOMINUS))
(T (MOVE.BACK.TO (PREVWORD \CURSOR EDITARG]
[%) (* moves ahead one word)
(COND
(EDITMINUS (SETQ CHAR (CHARCODE %())
(GO NOMINUS))
((AT.END.OF.SCREEN)
(BEEP))
(T (MOVE.FORWARD.TO (FIND.NEXT.WORD \CURSOR EDITARG]
(TAB (* go to end of line)
(MOVE.TO.LINE (SETQ X (TTNEXTLINE \ARROW (SUB1VAR EDITARG)))
(fetch END of X)))
[↑L (* go to start of line)
(MOVE.TO.LINE (PREVLINE \ARROW (SUB1VAR EDITARG]
({ (* { goes to start of buffer, like infinite FF)
(MOVE.TO.LINE \FIRSTLINE))
(} (* } goes to end of buffer, like infinite TAB)
(MOVE.TO.LINE (SETQ X (TTLASTLINE))
(fetch END of X)))
[LF (* moves down)
(COND
(EDITMINUS (SETQ CHAR (CHARCODE ↑))
(GO NOMINUS))
[(ON.LAST.LINE)
(COND
((EMPTY.BUFFER) (* Treat this the same as regular linefeed, i.e. restore
buffer)
(RETURN (CHARCODE LF)))
(T (BEEP]
(T (MOVE.TO.LINE (SETQ X (TTNEXTLINE \ARROW EDITARG))
(NTH.COLUMN.OF X (EDITCOLUMN]
[↑ (* moves up)
(COND
(EDITMINUS (SETQ CHAR (CHARCODE LF))
(GO NOMINUS))
((ON.FIRST.LINE)
(BEEP))
(T (MOVE.TO.LINE (SETQ X (PREVLINE \ARROW (IMIN (IPLUS \LOC.ROW.0 \CURSORROW)
EDITARG)))
(NTH.COLUMN.OF X (EDITCOLUMN]
[K (* kills one char)
(COND
((AT.END.OF.LINE)
(BEEP))
(T (FORWARD.DELETE.TO (TTNTH \CURSOR EDITARG]
[I (* insert)
[COND
((NEQ EDITARG 1750Q)
(* $$I inserts line on any terminal; on EDIT-key terminals, we also allow TV's silly method of saying $I<cr>, so
have to peek at the next char)
(COND
((OR (NOT (CAPABILITY? EDIT))
(NOT (PROGN (SETQ CHAR (TTBIN))
\EDITBIT)))
(OR (AT.END.OF.LINE)
(SETQ \INSERTING T))
(RETURN CHAR))
((NEQ CHAR (CHARCODE CR)) (* editbit shuts off insert mode)
(SETQ EDITARG 1)
(GO NOMINUS] (* I<cr> means insert blank line IN FRONT OF this line
and stay on it)
(COND
((ON.FIRST.LINE) (* Difficult to insert line in front of first, so use
plan b)
(MOVE.BACK.TO \BUFFER)
(BREAKLINE EOLCHARCODE)
(MOVE.TO.LINE \FIRSTLINE))
(T (GO.TO.RELATIVE NIL (SUB1 \CURSORROW))
(* Since INSERTLINE thinks you're on the previous line)
(INSERTLINE (PREVLINE \ARROW 1)
EOLCHARCODE)
(SETQ \CURSOR (fetch START of (SETQ \ARROW (PREVLINE \ARROW 1]
((S Z B) (* various skip or zap commands)
(SKIP/ZAP CHAR (TTBIN)
EDITARG EDITMINUS))
[A (* repeat last S or Z)
(COND
((SETQ LASTSKIP (fetch LASTSKIP of \TTYINSTATE))
(SKIP/ZAP LASTSKIP (fetch LASTSKIPCHAR of \TTYINSTATE)
EDITARG EDITMINUS))
(T (BEEP]
(L (* lowercase word)
(U/L-CASE EDITARG))
(U (* uppercase word)
(U/L-CASE EDITARG T))
(C (* capitalize word)
(U/L-CASE EDITARG 1))
[G (* grab a copy of Nth previous line)
(COND
((OR (ON.FIRST.LINE)
(NOT (AT.END.OF.LINE))
(EQ (SETQ X (NTH.COLUMN.OF (SETQ L (PREVLINE \ARROW EDITARG))
\CURSORCOL))
(fetch END of L))) (* nothing to copy)
(BEEP))
(T (READFROMBUF X (fetch END of L)
T]
[%] (* Move to end of current expression)
(COND
((AT.END.OF.BUF)
(BEEP))
(T (MOVE.TO.WHEREVER (OR (TTSKREAD (TTNEXTCHAR \CURSOR))
\ENDBUFFER]
[%[ (* Move to start of current list expression)
(COND
((AT.START.OF.BUF)
(BEEP))
(T (MOVE.TO.WHEREVER (BACKSKREAD \CURSOR]
[↑W (* delete current word)
(COND
((EMPTY.LINE) (* empty buffer)
(BEEP))
((INSERTING) (* Don't want to delete whole word, just what's before
the cursor)
(BACKWARD.DELETE.TO (PREVWORD \CURSOR EDITARG)))
(T (SETQ X (OR (AT.END.OF.LINE)
(SELCHARQ (CAR \CURSOR)
((%( %) %[ %])
NIL)
T)))
(* X is true if not sitting on a paren, in which case we want to treat parens as spaces; if on a paren, then allow
below to delete parens as well)
(MOVE.TO.START.OF.WORD)
(FORWARD.DELETE.TO (FIND.NEXT.WORD \CURSOR EDITARG X]
(↑Y (* gets userexec)
(COND
((AND (EQ EDITARG 1750Q)
(NEQ \CURSOR \ENDBUFFER))
(TTUNREADBUF) (* Stuff what's ahead of cursor into input buffer)
))
(SETQ \EDITBIT T)
(RETURN CHAR))
[(↑Q ↑U) (* Delete line; ↑U for tops20 folk)
(COND
((EQ EDITARG 1750Q)
(DELETE.TO.END))
(T (DELETELINE \ARROW]
[D (COND
[EMACSFLG (* EMACS interpretation is delete to end of word)
(COND
((AT.END.OF.LINE)
(BEEP))
(T (COND
((AND (NEQ (SETQ X (FIND.NEXT.WORD \CURSOR EDITARG T))
(fetch END of \ARROW))
(NOT (AT.START.OF.LINE))
[NOT (WORDSEPRP (CAR (TTNLEFT \CURSOR 1]
[SPACEP (CAR (SETQ L (TTNLEFT X 1 \CURSOR]
(NEQ L \CURSOR))
(* Don't want to delete all the way to start of new word, since we'd like a little space in between.
Simulating EMACS would probably be easier if we just made FIND.NEXT.WORD stop at the intervening spaces rather
than at the end)
(SETQ X L)))
(FORWARD.DELETE.TO X]
(T (* D is TVEDIT's delete command -- convert it to
appropriate cmd)
(SELCHARQ (TTBIN)
(CR (SETQ CHAR (CHARCODE ↑Q))
(GO LP))
(DEL (SETQ CHAR (CHARCODE ↑W))
(GO LP))
(BEEP]
[F (* accept tvedit's $$F to finish)
(COND
[(EQ EDITARG 1750Q)
(MOVE.TO.WHEREVER \ENDBUFFER)
(COND
((NEQ \CURSOR \ENDBUFFER) (* This is because the cursor mover refuses to put me in
column 120Q of a line, due to certain anomalies)
(add \CURSORCOL (SEGMENT.BIT.LENGTH \CURSOR \ENDBUFFER))
(SETQ \CURSOR \ENDBUFFER)
(OVERFLOW? 0)))
(RETURN (COND
(\REPEAT (* End with ↑Z)
(CHARCODE ↑Z))
(\READING (* End read with "]"; of course, this doesn't always
"finish", but it's simple enough to remember what this
is)
(CHARCODE %]))
(T (CHARCODE CR]
(T (BEEP]
(J (* Justify/fill line)
(ADJUSTLINE.AND.RESTORE EDITARG))
(- (* minus sign negates arg)
(SETQ EDITARG 0)
(SETQ EDITMINUS T)
(GO DONUMBERS))
(ESCAPE (* ESCAPE may modify next command)
[COND
((AND (EQ EDITARG 1750Q)
(EQ EDITPREFIXCHAR (CHARCODE ESCAPE)))
(* 3 escapes in a row is the way to type a regular Escape when Escape is the edit prefix. Better ways might be
forthcoming)
(RETURN (CHARCODE ESCAPE]
(SETQ EDITARG 1750Q) (* 1750Q is an adequate infinity for these purposes)
(SETQ EDITMINUS)
(SETQ CHAR (TTBIN))
(GO LP))
[(N ↑R) (* refresh n lines, or whole buffer for $$N)
(COND
((EQ EDITARG 1750Q)
(RETYPE.BUFFER \FIRSTLINE T))
(EDITMINUS (RETYPE.BUFFER (PREVLINE \ARROW EDITARG)
\ARROW))
(T (RETYPE.BUFFER \ARROW (TTNEXTLINE \ARROW EDITARG]
[T (* transpose chars. If at end of line, do preceding two,
else do the ones before and after the cursor.)
[SETQ L (TTNLEFT \CURSOR (SETQ X (COND
((AT.END.OF.LINE)
2)
(T 1] (* start of swap)
(COND
((OR (EQ L \CURSOR)
(PREFIXCHAR (CAR L))
(AND (EQ X 2)
(EQ (CDR L)
\CURSOR))
(PREFIXCHAR (CADR L))) (* Complain if not enough chars to swap, or one of them
is a funny multiple char (I'm lazy))
(BEEP))
(T [GO.TO.RELATIVE (IDIFFERENCE \CURSORCOL (SEGMENT.BIT.LENGTH
L
(NTH L (ADD1 X]
(* Back up to start of segment)
[FRPLACA L (PROG1 (CADR L)
(FRPLACA (CDR L)
(CAR L]
(* Do the swap in the buffer)
(TYPE.BUFFER L (CDDR L)) (* Fix the display)
(COND
((EQ X 1) (* Were between two chars, so get back there)
(GO.TO.RELATIVE (IDIFFERENCE \CURSORCOL (TTBITWIDTH
(REALBITS (CADR L]
(O (* Open line, i.e. insert <cr> but stay here)
(BREAKLINE EOLCHARCODE T))
[← (* Special hack: says to add the word before the cursor
to USERWORDS, so I can use altmode completion on it)
(COND
[(AND TTYINCOMPLETEFLG (SETQ X (CURRENT.WORD))
[SETQ X (PROG ((\BUFFER X))
(RETURN (TTRATOM]
(LITATOM X))
(COND
((ZEROP EDITARG) (* Means to remove! I don't know if there's an
"official" way to do this)
(DREMOVE X USERWORDS))
(T (ADDSPELL X 0]
(T (BEEP]
(P (DO.EDIT.PP))
(COND
((SETQ CHAR (EDITNUMBERP CHAR))
(SETQ EDITARG CHAR)
(GO DONUMBERS))
(T (BEEP]
(SETQ \LASTCHAR CHAR)
(RETURN)
NOMINUS
(SETQ EDITMINUS)
(GO LP)
DONUMBERS
(* * scanning a numeric arg. EDITARG is its magnitude; EDITMINUS set if negative. <edit>escape is treated as 1000,
which is probably big enough. Doesn't matter if any of the next chars has edit bit on, since once we start a
number, any other digits must be part of it, since numbers aren't themselves commands)
(COND
([SETQ X (EDITNUMBERP (SETQ CHAR (TTBIN]
[SETQ EDITARG (COND
((IGREATERP EDITARG 144Q) (* Limit numeric args to 1750Q so small number stuff
works)
1750Q)
(T (IPLUS (ITIMES EDITARG 12Q)
X]
(GO DONUMBERS)))
(COND
((AND EDITMINUS (ZEROP EDITARG)) (* Happens if we get a "-" followed by no number)
(SETQ EDITARG 1)))
(GO LP])
(DO.EDIT.PP
[LAMBDA NIL (* bvm: "18-OCT-82 12:38")
(COND
[\READING (PROG (LEFTOVER EXPRS (\BUFFER \BUFFER))
[COND
((NOT (TTYIN.BALANCE))
(COND
((NEQ \CURSOR \ENDBUFFER)
(SETQ LEFTOVER (COPY.SEGMENT \CURSOR \ENDBUFFER))
(SETQ \ENDBUFFER \CURSOR]
(SETQ \CURSOR \BUFFER)
[COND
((NEQ (TTSKIPSEPR)
\ENDBUFFER)
(SETQ EXPRS (CAR (OR (NLSETQ (TTYIN.READ 0 NIL (TTYIN.SCRATCHFILE)))
(PROGN (* Read failed, punt)
(TTYIN.BALANCE)
(RETURN (BEEP]
(MOVE.TO.LINE \FIRSTLINE)
(ERASE.TO.END.OF.PAGE)
(TTYIN1RESTART)
(replace FIRSTCOL of \ARROW with (replace LASTCOL of \ARROW with \CURSORCOL))
[COND
(EXPRS (TTLOADBUF (LIST HISTSTR1 (TTYIN.PPTOFILE EXPRS]
(COND
(LEFTOVER (BREAKLINE (CHARCODE EOL))
(READFROMBUF LEFTOVER]
(T (RETYPE.BUFFER \FIRSTLINE T])
(DO?CMD
[LAMBDA (CMD \?TAIL)
(DECLARE (SPECVARS \?TAIL \?PARAMS \BUFFER)) (* bvm: "23-Aug-84 13:34")
(* * Handles "read macros" ? and ?=. CMD is one of those. Returns NIL if thinks it isn't. Saves current cursor
location for later restoration)
(PROG ((\BUFFER \BUFFER)
(START (BACKSKREAD \CURSOR))
FN)
(SELCHARQ (CAR START)
[(%( %[)
(COND
((AND (EQ (SCANFORWARD (CAR START)
\BUFFER)
START)
(PROGN (* START is the first paren in buffer, so check and see
if there's an atom before it)
(SETQ FN (TTRATOM))
[COND
((OR (EQ FN (QUOTE E))
(AND (EQ \PROMPT1 (QUOTE *))
(FMEMB FN EDITCOMSL)))
(* What looks like a fn in apply format is really a
command, either E or an editor command)
(SETQ FN (TTRATOM]
(EQ (TTSKIPSEPR)
START))) (* This is first list on line, preceded by FN in evalqt
format)
)
(T (SETQ \BUFFER (CDR START)) (* EVAL form: read fn)
(COND
((EQ (SETQ FN (TTRATOM))
CMD) (* Hasn't typed the fn name yet!)
(RETURN]
(PROGN (* Not inside a list now, so no macro)
(RETURN)))
(SAVE.CURSOR)
(COND
[(NLSETQ (PROG ((\?PARAMS null)
STUFF)
(COND
((EQ CMD (QUOTE ?))
(TERPRI T)
(XHELPSYS FN)
(TAB 0 0 T))
(T (GO.TO.FREELINE)
[COND
((EQ \BUFFER START) (* Apply format, skip over paren)
(SETQ \BUFFER (CDR START]
(COND
([OR (NOT TTYIN?=FN)
(NOT (SETQ STUFF (APPLY* TTYIN?=FN FN]
(TTYIN.PRINTARGS FN (SMARTARGLIST FN T)
T))
((EQ (CAR (LISTP STUFF))
(QUOTE ARGS))
(TTYIN.PRINTARGS FN (CDR STUFF)
T))
((LISTP STUFF)
(TTPRIN2 STUFF))
((NEQ STUFF T)
(TTPRIN1 STUFF]
((EQ CMD (QUOTE ?=))
(* error occurred, probably undefined fn. This used to cause the cursor to be down further, in which case we did
TTCRLF.ACCOUNT, but now it is quiet)
(BEEP)))
(SELECTQ CMD
(? (* restore buffer after help is given, and now delete
the ?)
(TTRUBOUT)
(SAVE.CURSOR))
[?= (COND
((CAPABILITY? MOVEMENT)
(RESTORE.CURSOR)
(BACKWARD.DELETE.TO \?TAIL))
(T (BACKWARD.DELETE.TO \?TAIL) (* Delete BEFORE retyping, since we can't erase ?= as
above)
(RETYPE.BUFFER \ARROW]
NIL)
(RETURN T])
(TTYIN.PRINTARGS
[LAMBDA (FN ARGS ACTUALS ARGTYPE) (* bvm: " 6-OCT-83 15:46")
(PROG (TYPE)
(* Prints args to fn, mastching up with ACTUALS, if supplied. Do this in a way that lets us keep track of where we
are)
(TTPRIN1 (SELECTQ (SYSTEMTYPE)
(D (QUOTE %())
(QUOTE %[)))
(DSPFONT (PROG1 (DSPFONT [CDR (COND
((EQ (CAR TTYINBOLDFONT)
\FONT)
TTYINBOLDFONT)
(T (\SET.TTYINBOLDFONT \FONT]
\DSP) (* Make fn name boldface)
(TTPRIN1 FN))
\DSP)
[COND
((NOT ARGS))
((NLISTP ARGS)
(TTPRIN1 (QUOTE % ))
(TTPRIN1 ARGS)
(TTPRIN1 (QUOTE ...)))
(T [COND
((COND
((EQ ACTUALS T)
(SETQ ACTUALS (TTYIN.READ?=ARGS)))
(T ACTUALS))
[COND
((CDR ACTUALS)
(TTCRLF))
(T (TTPRIN1 (QUOTE % ]
(while ACTUALS
do [TTPRIN2 (COND
(ARGS (OR (CAR (LISTP ARGS))
ARGS))
(T (QUOTE extra]
(TTPRIN1 " = ")
[COND
((LISTP ARGS)
(TTPRIN2 (CAR ACTUALS)
2 4)
(SETQ ARGS (CDR ARGS))
(SETQ ACTUALS (CDR ACTUALS)))
(T (TTPRIN2 ACTUALS 2 4)
(SETQ ARGS (SETQ ACTUALS]
(TTCRLF]
(while ARGS do (COND
((LISTP ARGS)
(TTPRIN1 (QUOTE % ))
(TTPRIN2 (CAR ARGS))
(SETQ ARGS (CDR ARGS)))
(T (TTPRIN1 " . ")
(TTPRIN2 ARGS)
(RETURN]
(TTPRIN1 (SELECTQ (SYSTEMTYPE)
(D (QUOTE %)))
(QUOTE %])))
(COND
((SETQ TYPE (SELECTQ (OR ARGTYPE (ARGTYPE FN))
(1 (QUOTE NL))
(3 (QUOTE NL*))
(2 (QUOTE L*))
NIL)) (* indicate arg type)
(TTPRIN1 " {")
(TTPRIN1 TYPE)
(TTPRIN1 (QUOTE }])
(TTYIN.READ?=ARGS
[LAMBDA NIL (* bvm: "22-SEP-82 15:18")
(COND
[(EQ \?PARAMS null)
(SETQ \?PARAMS (COND
((NEQ (TTSKIPSEPR \?TAIL)
\?TAIL)
(PROG [(FILE (\GETOFD (TTYIN.SCRATCHFILE)
(QUOTE INPUT]
(\BOUT FILE (CHARCODE %())
[for (BUF ← \BUFFER) by (TTNEXTCHAR BUF) until (EQ BUF \?TAIL)
do (\BOUT FILE (REALBITS (CAR BUF]
(\BOUT FILE (CHARCODE %)))
(SETFILEPTR FILE 0)
(RETURN (READ FILE RDTBL]
(T (LISTP \?PARAMS])
(DOTABS
[LAMBDA (TABS) (* bvm: " 1-JUN-82 18:06")
(* Tab to next tabstop in TABS, if any.
Represent pseudotabs as prefix chars 240Q.
Return T if anything done)
(AND TABS (AT.END.OF.BUF)
(for TB in TABS bind SPACES when (AND (SMALLP TB)
(IGREATERP (SETQ SPACES (IDIFFERENCE (ITIMES TB
\CHARWIDTH)
\CURSORCOL))
\CHARWIDTH))
do (OVERFLOW? (SETQ SPACES (IQUOTIENT SPACES \CHARWIDTH)))
(INSERT.CHAR.IN.BUF (PREFIXCHARCODE SPACE))
(* Stick in a pseudo-tab)
(FRPTQ SPACES (ADDCHAR (PADCHARCODE SPACE)))
(* Echo as spaces)
(RETURN T])
(EDITCOLUMN
[LAMBDA NIL (* bvm: "24-AUG-81 23:17")
(* If last edit command moved up/down, then return the same column we were using then; else use current cursor
column, and record it as the "goal" column for any future such commands)
(OR (SELCHARQ \LASTCHAR
((LF ↑)
\HOMECOL)
NIL)
(SETQ \HOMECOL \CURSORCOL])
(EDITNUMBERP
[LAMBDA (CHAR) (* bvm: "11-MAR-81 22:05")
(AND [NOT (MINUSP (SETQ CHAR (IDIFFERENCE CHAR (CONSTANT (CHCON1 0]
(NOT (IGREATERP CHAR 11Q))
CHAR])
(END.DELETE.MODE
[LAMBDA NIL (* bvm: "19-MAR-81 11:59")
(COND
(\DELETING (SELECTQ TTYINBSFLG
(NIL (TTBOUT \))
[LF (COND
((IGREATERP \DELETING 1) (* if more than one char x'd out, lf to new line)
(DO.LF]
NIL)
(SETQ \DELETING NIL])
(ENDREAD?
[LAMBDA NIL (* bvm: " 2-MAR-82 12:36")
(* Return true if the paren/bracket just typed terminates the input. It does if the right paren
(or even one earlier in buffer) is in excess, i.e unbalanced, or just balances and this is the only list on the
line, or we are doing a LISPX input and the input is in EVALQT form, with no space after the first atom)
(PROG (X)
(RETURN
(AND
(AT.END.OF.TEXT \CURSOR)
(SETQ X (TTSKREAD \BUFFER))
(OR
(NEQ X \ENDBUFFER)
(AND
[SELCHARQ
(CAR (SETQ X (FIND.NON.SPACE \BUFFER)))
((%( %[) (* OK, line started with paren/bracket)
T)
(AND
(EQ \READING (QUOTE EVALQT))
(NEQ \PROMPT1 (QUOTE *))
(while (NEQ X \ENDBUFFER)
do
(* Skip over this first atom, to see if input is in EVALQT form. Prompt check is so we don't do this in the
editor)
(SELCHARQ
(REALBITS (CAR X))
((SPACE TAB ↑Z %") (* Space, etc: probably wants more on line)
(RETURN NIL))
[(%( %[) (* Open paren/bracket: looks good)
(RETURN (PROGN (PROGN (PROGN (PROGN (PROGN (PROGN (PROGN
(* Prettyprint sucks again!)
T]
(%% (* Skip over % )
(SETQ X (CDR X)))
NIL)
(SETQ X (CDR X]
(EQ (CDR (TTSKREAD (CDR X)))
\CURSOR])
(FIND.LINE
[LAMBDA (BUF)
(DECLARE (USEDFREE \FIRSTLINE)) (* bvm: "20-Mar-84 11:23")
(* * Returns the buffer LINE on which BUF, a cursor position, occurs)
(for (LINE ←(PROGN \FIRSTLINE))
do (COND
[(EQ BUF (fetch END of LINE)) (* Check this separately so next BUFTAILP doesn't catch
it)
(RETURN (COND
((OVERFLOWLINE? LINE)
(fetch NEXTLINE of LINE))
(T LINE]
((BUFTAILP BUF (fetch START of LINE)
(fetch END of LINE))
(RETURN LINE)))
(OR (SETQ LINE (fetch NEXTLINE of LINE))
(SHOULDNT])
(FIND.LINE.BREAK
[LAMBDA (START END USELAST) (* bvm: "20-FEB-82 22:35")
(* * Locates a place between START and END where line can be broken. If USELAST is true, returns last such place,
else first)
(while (NEQ START END) do [COND
((EQ (CAR START)
(CHARCODE SPACE))
(COND
(USELAST (SETQ $$VAL START))
(T (RETURN START]
(SETQ START (TTNEXTCHAR START])
(FIND.MATCHING.QUOTE
[LAMBDA (BUF END) (* bvm: "24-AUG-81 23:57")
(* * Searches BUF until END for a closing double-quote)
(while (NEQ BUF END) do (SELCHARQ (CAR BUF)
(%" (RETURN BUF))
[%% (* "%%" quotes next char)
(COND
((EQ (SETQ BUF (CDR BUF))
END)
(RETURN]
NIL)
(SETQ BUF (CDR BUF])
(FIND.MATCHING.WORD
[LAMBDA (WORDS START BUFTAIL) (* bvm: "20-FEB-82 22:34")
(* Find the first word in spelling list WORDS which matches the characters in the buffer from START to BUFTAIL
(or current cursor position), and return the corresponding tail of WORDS)
(OR BUFTAIL (SETQ BUFTAIL \CURSOR))
(find TAIL on WORDS suchthat (WORD.MATCHES.BUFFER (INPART (CAR TAIL))
START BUFTAIL])
(FIND.NEXT.WORD
[LAMBDA (BUFTAIL N BACKUPFLG) (* bvm: "25-FEB-82 22:39")
(* * Return start of Nth word after BUFTAIL, or end of line if none. BACKUPFLG means if you cross a paren getting
to the Nth word, return the paren rather than the word (used for smart word-delete))
(PROG ((END (fetch END of \ARROW)))
(COND
((EQ BUFTAIL END)
(RETURN END)))
(SETQ BUFTAIL (CDR BUFTAIL))
LP [COND
((EQ BUFTAIL END)
(RETURN END))
((WORDSEPRP (CAR BUFTAIL)) (* Found a space. Now scan for first non-space, and
return there)
[COND
(BACKUPFLG (SETQ BUFTAIL (SETQ BACKUPFLG (FIND.START.OF.WORD BUFTAIL END]
(while (AND (NEQ BUFTAIL END)
(WORDSEPRP (CAR BUFTAIL)))
do (SETQ BUFTAIL (CDR BUFTAIL)))
(COND
((OR (NOT N)
(ZEROP (SUB1VAR N))
(EQ BUFTAIL END))
(RETURN (OR BACKUPFLG BUFTAIL]
(SETQ BUFTAIL (CDR BUFTAIL))
(GO LP])
(FIND.NON.SPACE
[LAMBDA (BUF END) (* bvm: " 2-MAR-82 12:35")
(OR END (SETQ END \ENDBUFFER))
(while (AND (NEQ BUF END)
(SPACEP (CAR BUF)))
do (SETQ BUF (CDR BUF)))
BUF])
(FIND.START.OF.WORD
[LAMBDA (BUF END) (* bvm: "25-FEB-82 22:46")
(* * Returns position of first word, i.e. non-space, in BUF before END)
(OR END (SETQ END \ENDBUFFER))
(while (AND (NEQ BUF END)
(WORDSEPRP (CAR BUF)))
do (SETQ BUF (CDR BUF)))
BUF])
(FORWARD.DELETE.TO
[LAMBDA (BUFTAIL) (* bvm: " 1-JUN-82 17:16")
(* * Delete from \CURSOR to BUFTAIL. Cursor does not move)
[COND
((EQ BUFTAIL \CURSOR) (* Nothing to do)
)
((EQ BUFTAIL \ENDBUFFER) (* deleting to end is simple)
(ERASE.TO.END.OF.LINE)
(replace END of \ARROW with (SETQ \ENDBUFFER \CURSOR))
(replace LASTCOL of \ARROW with \CURSORCOL))
(T (PROG ((DELETEDWIDTH (SEGMENT.BIT.LENGTH \CURSOR BUFTAIL))
L)
(COND
((EQ BUFTAIL (fetch END of \ARROW)) (* End pointer is about to disappear into free list, so
move it back here)
(replace END of \ARROW with \CURSOR)
[COND
((EQ (fetch START of (SETQ L (fetch NEXTLINE of \ARROW)))
BUFTAIL)
(replace START of L with \CURSOR)
(COND
((EQ (fetch END of L)
BUFTAIL)
(replace END of L with \CURSOR]
(ERASE.TO.END.OF.LINE))
(T (TTDELSECTION DELETEDWIDTH)))
(KILLSEGMENT \CURSOR BUFTAIL)
(replace LASTCOL of \ARROW with (IDIFFERENCE (fetch LASTCOL of \ARROW)
DELETEDWIDTH))
(COND
((OVERFLOWLINE? \ARROW)
(ADJUSTLINE.AND.RESTORE]
\CURSOR])
(GO.TO.ADDRESSING
[LAMBDA (COL ROW) (* bvm: "20-Mar-84 14:50")
(* Regardless of where we are now, go to logical
position COL,ROW using cursor addressing)
(PROG ((ABSROW (IPLUS \LOC.ROW.0 ROW)))
(TTSETCURSOR COL ABSROW)
(* Used to prohibit going above top, but that is ugly. Better to go up there and be clipped out of existence by
the display code. Formerly: (COND ((ILESSP ABSROW 0) (* trying to go beyond top of screen;
ideally we should scroll, but for now just forbid it) (SETQ ROW (IDIFFERENCE ROW ABSROW)) 0)
((NOT (ILESSP ABSROW \TTPAGELENGTH)) (* This shouldn't happen at all until we can scroll!)
(SETQ ROW (IPLUS (IDIFFERENCE ROW ABSROW) \TTPAGELENGTH -1)) (SUB1 \TTPAGELENGTH)) (T ABSROW)))
(SETQ \CURSORROW ROW)
(SETQ \CURSORCOL COL])
(GO.TO.FREELINE
[LAMBDA NIL (* bvm: "30-MAR-82 14:54")
(* * Moves cursor to the first free line after the buffer, and clears it)
(GO.TO.RELATIVE NIL (fetch ROW of (TTLASTLINE))) (* Put the cursor on the last row of buffer)
(TTCRLF) (* And down one more)
(COND
((CAPABILITY? ERASE.TO.END)
(ERASE.TO.END.OF.PAGE])
(GO.TO.RELATIVE
[LAMBDA (COL ROW) (* bvm: "21-APR-83 11:42")
(* * Moves cursor to indicated row/col. ROW arg may be omitted if the movement is on the same row.
If COL=LINE then ROW is interpreted as a LINE record, and destination is the start of that line)
[PROG ((FROMROW \CURSORROW)
(FROMCOL \CURSORCOL))
(COND
((EQ COL (QUOTE LINE))
(SETQ COL (fetch FIRSTCOL of ROW))
(SETQ ROW (fetch ROW of ROW)))
((NOT COL)
(SETQ COL FROMCOL))
((NOT ROW)
(SETQ ROW FROMROW)))
(* (COND ((EQ FROMCOL \TTLINELENGTH) (SETQ FROMCOL 0) (* Cursor is logically at the end of the line, but on a dm,
an auto crlf has occurred, so cursor is really at start of next line) (DO.CRLF) (* This is supposed to work
(i.e. autocr means a crlf now is ignored), but what if something was sent between then and now?)
(ADD1VAR FROMROW))) (COND ((EQ COL \TTLINELENGTH) (* This shouldn't happen, but it can if there is a line that
fills the screen line but ends in a cr) (SETQ COL 0) (ADD1VAR ROW))))
(RETURN (MOVETO (IPLUS COL \LMARG)
(IPLUS (ITIMES (SUB1 (IDIFFERENCE \TTPAGELENGTH (IPLUS \LOC.ROW.0 ROW)))
\CHARHEIGHT)
\BMARG)
\DSP))
(* (COND ((NOT DISPLAYTERMFLG) (* Can't actually move cursor) (RETURN)) ((AND (CAPABILITY? \CURSOR T)
(COND ((EQ ROW FROMROW) (IGREATERP (IABS (IDIFFERENCE COL FROMCOL)) 1)) ((EQ COL FROMCOL)
(IGREATERP (IABS (IDIFFERENCE ROW FROMROW)) 1)) (T T))) (* If moving very far, use cursor addressing)
(RETURN (GO.TO.ADDRESSING COL ROW))) ((ILESSP FROMCOL COL) (* Only way to move forward is one position at a time)
(DO.FORWARD (IDIFFERENCE COL FROMCOL))) ((ILESSP (IPLUS COL 2) (IDIFFERENCE FROMCOL COL))
(* Moving backward to a position which is closer to left margin than to the current position, so do it by a CR
first. Note: this assumes that moving backward and moving forward are equally expensive; probably
terminal-dependent) (COND ((ILESSP FROMROW ROW) (* Already above where we are going, so CR will take us down 1 row
as well as putting us in col 0) (ADD1VAR FROMROW)) (T (DO.UP 1))) (DO.CRLF) (* actually, CR alone suffices, except
that if the next char we output is a LF, it will be ignored, so do the LF anyway to avoid confusion.
Besides, some clowns tried to simulate a datamedia and forgot this not very desirable feature, and thus we will be
able to work on those terminals, too) (DO.FORWARD COL)) (T (DO.BACK (IDIFFERENCE FROMCOL COL))))
(COND ((EQ FROMROW ROW) (* No row adjustment)) ((IGREATERP FROMROW ROW) (DO.UP (IDIFFERENCE FROMROW ROW)))
(T (DO.DOWN (IDIFFERENCE ROW FROMROW)))))
]
(SETQ \CURSORROW ROW)
(SETQ \CURSORCOL COL])
(INIT.CURSOR
[LAMBDA (COL) (* bvm: "23-MAR-83 15:31")
(* * Initializes cursor accounting; in Interlisp-10, this assumed/forced the cursor to be in column COL of the
bottom row of the screen)
(PROG ((YBOT (fetch (REGION BOTTOM) of (DSPCLIPPINGREGION NIL \DSP)))
INITY)
(SETQ INITY (IDIFFERENCE (DSPYPOSITION NIL \DSP)
YBOT))
[SETQ \LOC.ROW.0 (SUB1 (IDIFFERENCE \TTPAGELENGTH (IQUOTIENT INITY \CHARHEIGHT]
(* \LOC.ROW.0 is the number of the "line" of the first line of text, counting from the top of the window.
Instead, we really should count from the bottom and fix everyone who cares)
(SETQ \BMARG (IPLUS YBOT (IREMAINDER INITY \CHARHEIGHT)))
(SETQ \CURSORROW 0)
(SETQ \CURSORCOL COL])
(INSERT.CHAR.IN.BUF
[LAMBDA (CHAR) (* bvm: "20-FEB-82 22:22")
(* * Inserts CHAR in buffer at \CURSOR and advances \CURSOR appropriately)
(INSERT.NODE \CURSOR)
(FRPLACA \CURSOR CHAR)
[COND
((AT.END.OF.LINE)
(replace END of \ARROW with (CDR \CURSOR]
(SETQ \CURSOR (CDR \CURSOR])
(INSERT.NODE
[LAMBDA (BUF) (* bvm: "20-FEB-82 22:34")
(* * Effectively does (ATTACH garbage BUF), but reuses from the garbage heap)
(COND
((EQ BUF \ENDBUFFER) (* Already at end, just push pointer)
(SETQ \ENDBUFFER (TTNEXTNODE \ENDBUFFER)))
(T (FRPLACD BUF (FRPLNODE2 (SCRATCHCONS)
BUF])
(INSERTLINE
[LAMBDA (OLDLINE USECR) (* bvm: " 1-JUN-82 18:45")
(* Inserts a new line between OLDLINE and the next line, whose START is the END of LINE; caller must fill in END
if line is non-empty (defaults to start); USECR, if supplied, is the <cr> char to end the previous line with)
(PROG ((OLDEND (fetch END of OLDLINE))
(ROW (ADD1 (fetch ROW of OLDLINE)))
X NEWLINE)
[COND
(USECR (INSERT.NODE OLDEND)
(FRPLACA OLDEND USECR)
(SETQ OLDEND (CDR OLDEND]
(TTCRLF)
(COND
((NEQ OLDEND \ENDBUFFER) (* Not last line, so insert a line on screen.)
(DO.INSERT.LINE 1)))
(TTPROMPTCHAR)
[replace NEXTLINE of OLDLINE with (SETQ NEWLINE (CREATE.LINE OLDEND OLDEND (SETQ X
\CURSORCOL)
X ROW (fetch NEXTLINE
of OLDLINE]
(RENUMBER.LINES NEWLINE ROW)
(RETURN NEWLINE])
(KILL.LINES
[LAMBDA (FIRSTLINE) (* bvm: " 2-JUN-82 15:46")
(* * Returns line records from FIRSTLINE onward to the heap)
[PROG NIL
LP (COND
(FIRSTLINE (SETQ FIRSTLINE (CDR (FRPLACA FIRSTLINE 0)))
(* Remove some of the circularity in the buffer)
(GO LP]
(FRPLACD (FLAST \ENDBUFFER)
FIRSTLINE])
(KILLSEGMENT
[LAMBDA (START END) (* bvm: "25-AUG-81 17:25")
(* * Removes segment from START up to, but not including END. When done, START contains the contents of former
cell END. I.e. any pointer to START is still valid; any pointer to END should be reset to START.)
(COND
((EQ END \ENDBUFFER)
(SETQ \ENDBUFFER START))
(T (replace OLDTAIL of \TTYINSTATE with (SETQ \LASTAIL))
(* kill last buffer markers, as they may be trashed)
(FRPLNODE START (CAR END)
(PROG1 (CDR END)
(FRPLACD END (CDR \ENDBUFFER)) (* Cell at END will point to free list)
(FRPLACD \ENDBUFFER (CDR START)) (* And this segment now is start of free list)
])
(L-CASECODE
[LAMBDA (CHAR) (* bvm: "11-MAR-81 22:06")
(COND
([AND [NOT (ILESSP CHAR (CONSTANT (CHCON1 (QUOTE A]
(NOT (IGREATERP CHAR (CONSTANT (CHCON1 (QUOTE Z]
(LOGOR CHAR 40Q))
(T CHAR])
(MOVE.BACK.TO
[LAMBDA (BUFTAIL) (* bvm: " 1-JUN-82 18:10")
(GO.TO.RELATIVE (IDIFFERENCE \CURSORCOL (SEGMENT.BIT.LENGTH BUFTAIL \CURSOR)))
(SETQ \CURSOR BUFTAIL])
(MOVE.FORWARD.TO
[LAMBDA (BUFTAIL) (* bvm: " 1-JUN-82 18:03")
[GO.TO.RELATIVE (IPLUS \CURSORCOL (SEGMENT.BIT.LENGTH \CURSOR (SETQ BUFTAIL (CHECK.MARGIN BUFTAIL
\ARROW]
(SETQ \CURSOR BUFTAIL])
(MOVE.TO.LINE
[LAMBDA (NEWLINE BUFTAIL) (* bvm: " 1-JUN-82 17:56")
(* * Moves to indicated line at indicate buffer position (default is START), resetting \ARROW etc appropriately.)
(PROG ((RELATIVE.POSITION 0))
[COND
[BUFTAIL (SETQ RELATIVE.POSITION (SEGMENT.BIT.LENGTH (fetch START of NEWLINE)
(SETQ BUFTAIL (CHECK.MARGIN BUFTAIL
NEWLINE]
(T (SETQ BUFTAIL (fetch START of NEWLINE]
(GO.TO.RELATIVE (IPLUS (fetch FIRSTCOL of NEWLINE)
RELATIVE.POSITION)
(fetch ROW of NEWLINE))
(SETQ \CURSOR BUFTAIL)
(RETURN (SETQ \ARROW NEWLINE])
(MOVE.TO.NEXT.LINE
[LAMBDA NIL (* bvm: "20-FEB-82 22:20")
(GO.TO.RELATIVE (QUOTE LINE)
(SETQ \ARROW (fetch NEXTLINE of \ARROW)))
(SETQ \CURSOR (fetch START of \ARROW])
(MOVE.TO.START.OF.WORD
[LAMBDA NIL (* bvm: "20-FEB-82 22:34")
[COND
((AT.END.OF.LINE)
(MOVE.BACK.TO (PREVWORD \CURSOR)))
((SELCHARQ (CAR \CURSOR)
((%( %[)
NIL)
T)
(* Do nothing if sitting under an open paren/bracket, since otherwise the PREVWORD below will go to the previous
word, rather than selecting the "word" which begins with the paren; in all other cases the PREVWORD will do the
right thing: if under the word, goes to its start (ignoring parens), or if under a space goes to the start of the
word before the space)
(MOVE.BACK.TO (PREVWORD (TTNEXTCHAR \CURSOR]
NIL])
(MOVE.TO.WHEREVER
[LAMBDA (BUF) (* bvm: "24-Feb-80 00:28")
(* * Moves to BUF, wherever it may be.)
(MOVE.TO.LINE (FIND.LINE BUF)
BUF])
(NTH.COLUMN.OF
[LAMBDA (LINE N) (* bvm: "11-MAR-81 22:00")
(* * Returns buffer tail of LINE record which best approximates the Nth printing column of that line)
(NTH.RELATIVE.COLUMN.OF LINE (IDIFFERENCE N (fetch FIRSTCOL of LINE])
(NTH.RELATIVE.COLUMN.OF
[LAMBDA (LINE N) (* bvm: " 1-JUN-82 22:23")
(* Returns buffer tail in LINE which represents the Nth printing character on the line. Returns start or end of
buffer if out of range. If the nth char is a pad char, returns the start of the pad char sequence)
(COND
((NOT (IGREATERP N 0))
(fetch START of LINE))
(T (for WIDTH (BUF ←(fetch START of LINE))
(END ←(fetch END of LINE)) do [COND
((EQ BUF END)
(* Ran off the end, so quit)
(RETURN END))
((PREFIXCHAR (CAR BUF))
(* Does not print, but this is a safe place to return)
(SETQ $$VAL BUF))
(T [COND
([ILESSP N (SETQ WIDTH (TTBITWIDTH
(REALBITS (CAR BUF]
(RETURN (COND
((AND (NEQ BUF END)
(PADCHAR (CAR BUF)))
(* Can't return in the middle of a multichar, so go back
to its prefixchar)
$$VAL)
(T BUF]
(SETQ N (IDIFFERENCE N WIDTH]
(SETQ BUF (CDR BUF])
(OVERFLOW?
[LAMBDA (WIDTH) (* bvm: " 1-JUN-82 18:01")
(* If typing WIDTH more chars would cause this line to
overflow, starts new line (or simply goes to next line
when N=0))
(COND
((NOT (ILESSP (IPLUS \CURSORCOL WIDTH)
\RMARG))
(COND
[(AT.END.OF.LINE)
(PROG ((OLDLINE \ARROW))
(START.NEW.LINE)
(COND
((AND \AUTOFILL DISPLAYTERMFLG) (* Hit the margin in the middle of a word.
Try to move that word intact to the new line)
(ADJUSTLINE 1 OLDLINE)
(GO.TO.RELATIVE (fetch LASTCOL of \ARROW)
(fetch ROW of \ARROW]
((ZEROP WIDTH)
(MOVE.TO.NEXT.LINE))
(T (BREAKLINE])
(OVERFLOWLINE?
[LAMBDA (LINE) (* bvm: " 4-Aug-78 18:18")
(* * True if LINE overflows into next line, rather than ending in a cr)
(EQ (fetch END of LINE)
(fetch START of (fetch NEXTLINE of LINE])
(PREVLINE
[LAMBDA (LINE N) (* bvm: "11-MAR-81 21:39")
(* * Backs up N lines in buffer before LINE, as far as start of buffer. i.e. an NLEFT on line records.)
(PROG ((X \FIRSTLINE)
(L \FIRSTLINE))
LP (* Advance X by N chars)
(COND
((ZEROP N)
(GO LP1))
((OR (EQ X LINE)
(NULL X)) (* The NULL case should never happen, but better be safe)
(RETURN L)))
(SETQ X (fetch NEXTLINE of X))
(SUB1VAR N)
(GO LP)
LP1 (* Now advance X and L in parallel until X reaches LINE, at
which point L is N before it)
(COND
((OR (EQ X LINE)
(NULL X))
(RETURN L)))
(SETQ X (fetch NEXTLINE of X))
(SETQ L (fetch NEXTLINE of L))
(GO LP1])
(PREVWORD
[LAMBDA (BUF N START) (* bvm: " 5-SEP-83 18:21")
(OR START (SETQ START (fetch START of \ARROW)))
(for X←START
NEW←T
#HITS←0 by (TTNEXTCHAR X) until (EQ X BUF)
do
(* * Return start of the Nth word in line before BUF, or beginning of line if no such word)
(COND
((WORDSEPRP (CAR X)) (* Space between words)
(SETQ NEW T))
(NEW (SETQ $$VAL X) (* Start of new word)
(SETQ NEW NIL)
(ADD1VAR #HITS)))
finally (RETURN (COND
((OR (NOT N)
(EQ N 1)
(ZEROP #HITS))
(OR $$VAL START))
((ILESSP (SETQ N (IDIFFERENCE #HITS N))
0) (* N was greater than #words in buffer)
START)
((ZEROP N)
(FIND.START.OF.WORD START))
(T (FIND.NEXT.WORD (FIND.START.OF.WORD START)
N])
(PROPERTAILP
[LAMBDA (X Y) (* bvm: " 4-Aug-78 12:03")
(* * true if X is a PROPER tail of Y)
(AND X (NEQ X Y)
(BUFTAILP X Y])
(READFROMBUF
[LAMBDA (START END COPYFLG) (* bvm: "15-JUN-82 18:02")
(* Unreads the chars in the buffer from START to END. The cells are returned to the free pool as they are used to
reduce the storage demands on large unreads. Multichar sequences in buffer are unread as just their "real"
characters)
(PROG (FIXUP)
[COND
([AND (NOT (AT.END.OF.LINE))
(for (BUF ← START) by (CDR BUF) until (EQ BUF END) thereis (EQ (CAR BUF)
(CHARCODE EOL]
(* An insertion that contains a cr. This will look awful if we have to keep shoving text in front of us, so break
the line first, then unbreak it at end)
(BREAKLINE PSEUDOCRCODE (SETQ FIXUP T]
[until (EQ START END) do [COND
((NOT (PADCHAR (CAR START)))
(* Don't include pad chars)
(COND
((NEQ (CAR START)
EOLCHARCODE)
(ADDNAKEDCHAR (REALBITS (CAR START))
T))
((NOT (AT.END.OF.LINE))
(* Insert EOL in middle of line)
(BREAKLINE EOLCHARCODE))
((OR (NEQ (CDR START)
END)
(NOT (AT.END.OF.TEXT \CURSOR)))
(* EOL. Start new line. Ignore it if this is a
terminating eol)
(START.NEW.LINE EOLCHARCODE]
(SETQ START (PROG1 (CDR START)
(SELECTQ (SYSTEMTYPE)
(D
(* Don't bother reclaiming)
NIL)
(OR COPYFLG
(FRPLACD \ENDBUFFER
(FRPLACD START
(CDR \ENDBUFFER]
(COND
(FIXUP (* Kill the cr we inserted)
(MOVE.TO.WHEREVER (PROG1 \CURSOR (DELETE.LONG.SEGMENT1 \ARROW \CURSOR
(fetch NEXTLINE
of \ARROW)
(TTNEXTCHAR \CURSOR])
(RENUMBER.LINES
[LAMBDA (LINE ROW) (* bvm: " 4-Aug-78 18:18")
(* * Renumbers lines from LINE onward, giving LINE the value ROW)
(while LINE do (replace ROW of LINE with ROW)
(ADD1VAR ROW)
(SETQ LINE (fetch NEXTLINE of LINE])
(RESTORE.CURSOR
[LAMBDA NIL (* bvm: "20-FEB-82 22:21")
(COND
((CAPABILITY? MOVEMENT)
(GO.TO.RELATIVE \HOMECOL \HOMEROW])
(RESTOREBUF
[LAMBDA NIL (* bvm: "27-JUL-82 14:50")
(* recover previous buffer, which extends to either our current LASTAIL, if user has done deletions on this line,
or previous LASTAIL, stored in the front of the buffer. If neither, then recover last thing zapped with the mouse)
(PROG (TAIL)
(COND
([AND (AT.END.OF.BUF)
(SETQ TAIL (OR (AND \LASTAIL (IGEQ \LASTAILROW (fetch ROW of \ARROW))
(OR (IGREATERP \LASTAILCOL \CURSORCOL)
(IGREATERP \LASTAILROW (fetch ROW of \ARROW)))
(PROPERTAILP \LASTAIL \ENDBUFFER))
(PROPERTAILP (fetch OLDTAIL of \TTYINSTATE)
\ENDBUFFER]
(END.DELETE.MODE)
(READFROMBUF [CONS (CAR \ENDBUFFER)
(PROG1 (CDR \ENDBUFFER) (* now detach buffer from here to TAIL to avoid
conflict)
(FRPLNODE \ENDBUFFER 0 (CDR TAIL]
TAIL)
(SETQ \LASTAIL \ENDBUFFER)
(SETQ \LASTAILCOL \CURSORCOL)
(SETQ \LASTAILROW (fetch ROW of \ARROW))
(replace OLDTAIL of \TTYINSTATE with NIL))
(\LAST.DELETION (READFROMBUF \LAST.DELETION NIL T)
(ADJUSTLINE.AND.RESTORE T))
(T (* Can't find where buffer ended;
perhaps we have written past it)
(BEEP])
(RETYPE.BUFFER
[LAMBDA (LINE LASTLINE FROM.HERE) (* bvm: " 9-NOV-82 14:51")
(* Refreshes buffer starting with LINE for one line, or going to LASTLINE, where LASTLINE=T means end of buffer.
Moves cursor to start of LINE (based on where we think we might be now) unless FROM.HERE is set.
FROM.HERE is set when retyping whole buffer with the current cursor position defined as 0,0;
in this case, the cursor is restored on completion to wherever it was last saved, rather than its current
position)
(PROG (L (ROW (fetch ROW of LINE)))
(SETQ \DELETING)
(BINARY.MODE)
[COND
(FROM.HERE (INIT.CURSOR 0))
(T (SAVE.CURSOR)
(COND
[(CAPABILITY? MOVEMENT) (* position cursor at start of line)
(CANCEL.MODES) (* in case an funny terminal setting occurred, say
because of noise)
(COND
((CAPABILITY? \CURSOR T)
(GO.TO.ADDRESSING 0 ROW))
(T (DO.UP 1) (* Goto start of line by going up a line and doing a
crlf)
(DO.CRLF)
(SETQ \CURSORCOL 0]
(T (TTCRLF]
[COND
((ZEROP ROW) (* First line might be indented)
(SELECTQ (SYSTEMTYPE)
(D (RELMOVETO \INITPOS 0 \DSP))
(TTBOUTN (SETQ \CURSORCOL \INITPOS)
SPACE]
LP (TTPROMPTCHAR LINE)
(TYPE.BUFFER (fetch START of LINE)
(fetch END of LINE))
(COND
((AND LASTLINE (SETQ L (fetch NEXTLINE of LINE))
(NEQ L LASTLINE))
(SETQ LINE L)
(TTCRLF)
(ADD1VAR ROW)
(GO LP)))
(COND
((EQ LASTLINE T) (* kill any text that might be below bottom line)
(ERASE.TO.END.OF.PAGE)))
(RESTORE.CURSOR])
(SAVE.CURSOR
[LAMBDA NIL (* bvm: "11-MAR-81 21:40")
(SETQ \HOMEROW \CURSORROW)
(SETQ \HOMECOL \CURSORCOL])
(SCANBACK
[LAMBDA (CHAR BUF N START) (* bvm: "20-FEB-82 22:34")
(* * Searches back for Nth previous occurrence of CHAR in buffer before BUF, returning NIL if there are no
occurrences. Scan terminates at START, default is start of line; default N is 1; if there are fewer than N
occurrences, returns the earliest one it can)
(for [X ←(OR START (SETQ START (fetch START of \ARROW]
#HITS←0 by (TTNEXTCHAR X) until (EQ X BUF) do (COND
((EQ (U-CASECODE (REALBITS (CAR X)))
CHAR)
(SETQ $$VAL X)
(ADD1VAR #HITS)))
finally (RETURN (COND
((OR (NOT N)
(EQ N 1)
(ZEROP #HITS)
(EQ #HITS 1))
$$VAL)
(T (* There are #HITS occurrences of CHAR, and we want the
Nth from the end)
(SCANFORWARD CHAR START (ADD1 (IMAX (IDIFFERENCE #HITS N)
0))
BUF])
(SCANFORWARD
[LAMBDA (CHAR BUF N END) (* bvm: "20-FEB-82 22:34")
(* * Finds Nth occurrence of CHAR in BUF before END. Default END is end of current line; default N is 1;
CHAR should be uppercase if a letter)
(OR N (SETQ N 1))
(OR END (SETQ END (fetch END of \ARROW)))
(while (NEQ BUF END) do [COND
((EQ (U-CASECODE (REALBITS (CAR BUF)))
CHAR)
(COND
((ZEROP (SUB1VAR N))
(RETURN BUF))
(T (SETQ $$VAL BUF]
(SETQ BUF (TTNEXTCHAR BUF])
(SCRATCHCONS
[LAMBDA NIL (* bvm: "25-AUG-81 17:27")
(* * Returns a garbage cons from the heap at the end of the buffer, or a fresh cons if none available)
(replace OLDTAIL of \TTYINSTATE with (SETQ \LASTAIL)) (* Wipe out last buffer ptrs, as this may trash them)
(PROG1 (OR (CDR \ENDBUFFER)
(CONS))
(FRPLACD \ENDBUFFER (CDDR \ENDBUFFER])
(SEGMENT.LENGTH
[LAMBDA (START END) (* bvm: "25-Jul-78 23:07")
(* * Returns number of print positions in buffer from START to END)
(PROG ((N 0))
LP (COND
((EQ START END)
(RETURN N)))
(COND
((NOT (PREFIXCHAR (CAR START)))
(ADD1VAR N)))
(SETQ START (CDR START))
(GO LP])
(SEGMENT.BIT.LENGTH
[LAMBDA (START END) (* bvm: " 6-JUN-82 18:06")
(* * Returns number of print positions in bits in buffer from START to END)
(COND
(\VARIABLEFONT (PROG ((N 0))
LP (COND
((EQ START END)
(RETURN N)))
[COND
((NOT (PREFIXCHAR (CAR START)))
(add N (FCHARWIDTH (REALBITS (CAR START))
\FONT]
(SETQ START (CDR START))
(GO LP)))
(T (PROG ((N 0))
LP (COND
((EQ START END)
(RETURN N)))
(COND
((NOT (PREFIXCHAR (CAR START)))
(add N \CHARWIDTH)))
(SETQ START (CDR START))
(GO LP])
(SETLASTC
[LAMBDA (CHAR) (* bvm: "10-APR-81 23:28")
(* Makes CHAR be LASTC for T. This is a kludge;
I should be interfacing better with \LINEBUF.OFD at a more
fundamental level.)
(\BOUT \LINEBUF.OFD CHAR])
(SETTAIL?
[LAMBDA (EVEN.IF.NOT.THERE) (* bvm: "27-JUL-82 14:52")
(* If \ENDBUFFER is farther than we've been before, save this position on LASTAIL. If EVEN.IF.NOT.THERE is set, do
this even if cursor is not currently at the end)
(COND
([AND (NOT \DELETING)
(NOT (EMPTY.BUFFER))
(OR EVEN.IF.NOT.THERE (EQ \CURSOR \ENDBUFFER))
(OR (NOT \LASTAIL)
(OR (ILESSP \LASTAILROW (fetch ROW of \ARROW))
(AND (ILESSP \LASTAILCOL \CURSORCOL)
(ILEQ \LASTAILROW (fetch ROW of \ARROW]
(SETQ \LASTAIL \ENDBUFFER)
(SETQ \LASTAILCOL \CURSORCOL)
(SETQ \LASTAILROW (fetch ROW of \ARROW])
(SHOW.MATCHING.PAREN
[LAMBDA (BUF) (* lmm " 3-May-84 10:32")
(* * Indicates parenthesis nesting by briefly moving the cursor to the paren that matches the paren at BUF, if
that position is still on the screen. The cursor stays there for SHOWPARENFLG seconds, or until there is input
from the user. Assumes terminal has cursor addressability)
(PROG ((MATCHING (BACKSKREAD BUF T))
LINE ROW COL) (* MATCHING is the buffer position that matches BUF, or
NIL if this paren was quoted somehow.)
(OR MATCHING (RETURN))
(SETQ LINE (FIND.LINE MATCHING)) (* The buffer LINE on which it appears)
(COND
((ILESSP (IPLUS (SETQ ROW (fetch ROW of LINE))
\LOC.ROW.0)
0) (* Not on screen, so forget it)
(RETURN)))
(SETQ COL (IPLUS (SEGMENT.BIT.LENGTH (fetch START of LINE)
MATCHING)
(fetch FIRSTCOL of LINE))) (* The absolute column position)
(COND
((TYPEAHEAD?)
(* After all this computation, there is now input waiting, so don't do anything. Didn't do this earlier, since the
SIBE itself takes time, and is likely to fail when done immediately after reading the closing paren)
(RETURN)))
(SAVE.CURSOR)
(GO.TO.ADDRESSING COL ROW) (* Go to absolute coordinates of matching paren)
(TTWAITFORINPUT (COND
((FIXP SHOWPARENFLG)
(ITIMES SHOWPARENFLG 1750Q))
(T 1750Q))) (* Wait a while to let user see it)
(\CHECKCARET \DSP) (* Tell background we moved the cursor)
(RESTORE.CURSOR) (* Put cursor back where it belongs)
])
(SKIP/ZAP
[LAMBDA (CMD CHAR N MINUS) (* bvm: "20-FEB-82 22:34")
(* Performs <edit>S or <edit>Z, i.e. skip or zap to character. CMD is S, Z, B, or -Z (latter two are backward
versions of the first two); CHAR is the target character, N is a repeat arg and MINUS is its sign.
Last such operation is saved on LASTSKIP so that <edit>A can repeat it)
(SETQ CHAR (U-CASECODE CHAR)) (* Ignore case differences)
[COND
(MINUS (* invert command)
(SETQ CMD (SELECTC CMD
((CHARCODE S)
(CHARCODE B))
((CHARCODE B)
(CHARCODE S))
((CHARCODE Z)
(IMINUS (CHARCODE Z)))
((IMINUS (CHARCODE Z))
(CHARCODE Z))
(SHOULDNT]
(COND
([SETQ N (SELECTC CMD
((CHARCODE B)
(SCANBACK CHAR \CURSOR N))
((IMINUS (CHARCODE Z))
(SCANBACK CHAR (TTNLEFT \CURSOR 1)
N))
(AND (NOT (AT.END.OF.LINE))
(SCANFORWARD CHAR (TTNEXTCHAR \CURSOR)
N]
(SELECTC CMD
((CHARCODE S) (* S)
(MOVE.FORWARD.TO N))
((CHARCODE Z) (* Z)
(FORWARD.DELETE.TO N))
((CHARCODE B) (* B)
(MOVE.BACK.TO N))
[(IMINUS (CHARCODE Z)) (* -Z)
(FORWARD.DELETE.TO (PROG1 (COND
((AT.END.OF.LINE)
\CURSOR)
(T (TTNEXTCHAR \CURSOR)))
(MOVE.BACK.TO (TTNEXTCHAR N]
(SHOULDNT)))
(T (BEEP)))
(replace LASTSKIP of \TTYINSTATE with CMD)
(replace LASTSKIPCHAR of \TTYINSTATE with CHAR])
(START.NEW.LINE
[LAMBDA (USECR) (* bvm: "16-SEP-82 11:53")
(* * Handles moving to new line. USECR, if set, is the <cr> character that should terminate current line)
(SETQ \CURSOR (fetch START of (SETQ \ARROW (INSERTLINE \ARROW USECR])
(START.OF.PARAGRAPH?
[LAMBDA (LINE) (* bvm: "25-AUG-81 00:06")
(OR (EQ (fetch END of LINE)
(SETQ LINE (fetch START of LINE)))
(EQ (CAR LINE)
(PREFIXCHARCODE TAB])
(TTADJUSTWORD
[LAMBDA (WORD) (* bvm: "16-SEP-82 12:14")
(* * Returns WORD, possibly corrected, according to the spelling list, if any. Returns NIL if FIX was specified
and the word fails.)
(PROG (X)
(RETURN (COND
((OR (NULL SPLST)
(FMEMB WORD (QUOTE (%( %) %[ %] %" ,)))
(FMEMB WORD SPLST))
WORD)
((AND WORD (SETQ X (FASSOC WORD SPLST)))
(* Is synonym. FASSOC assumes car of atom is NIL)
(CDR X))
([AND SPLST (LITATOM WORD)
(NEQ \NOFIXSPELL (QUOTE NOFIXSPELL))
(SETQ X (FIXSPELL WORD 106Q SPLST (AND \NOFIXSPELL T)
NIL NIL NIL (NOT \SPLSTFLG]
(* respelled okay)
X)
(\FIX (TTPRIN1 WORD)
(TTPRIN1 (QUOTE ?))
(COND
(HELP (TTGIVEHELP HELP))
(T (TTPRIN1 " please try again.")))
(TTCRLF)
NIL)
(T WORD])
(TTBIN
[LAMBDA NIL (* bvm: "24-Aug-84 15:45")
(* * Read the next char from terminal, return its character code. Sets \EDITBIT true or false according to state
of the edit bit (200Q).)
(PROG ((CHAR (TTWAITFORINPUT NIL T)))
(COND
[(EQ CHAR EDITPREFIXCHAR) (* edit prefix)
(SETQ \EDITBIT T)
(SETQ CHAR (\GETKEY))
(COND
((EQ CHAR EDITPREFIXCHAR) (* Two edits in a row = Edit-Escape)
(SETQ CHAR 33Q]
((AND (IGREATERP CHAR 177Q)
(NEQ CHAR \TTYIN.RESTOREBUFCODE)
\TTYIN.METASTATE) (* Had meta key down, probably)
(SETQ \EDITBIT T)
(SETQ CHAR (LOGAND CHAR 177Q)))
(T (SETQ \EDITBIT NIL)))
(\CHECKCARET \DSP) (* Turn off the caret, since we will probably move)
(RETURN CHAR])
(TTBITWIDTH
[LAMBDA (CHAR) (* bvm: " 6-JUN-82 18:06")
(COND
(\VARIABLEFONT (FCHARWIDTH CHAR \FONT))
(T \CHARWIDTH])
(TTCOMPLETEWORD
[LAMBDA (CAUTIOUS MUST.BE.UNIQUE FIRSTMATCH FIRSTCHAR) (* bvm: " 4-JUN-82 18:23")
(* Tries to complete the current word from members of SPLST. Does nothing if no word in progress, or this is a
comment line. Returns true if some completion done. If CAUTIOUS, only complete if can do so uniquely and caller
permits fixspell; if MUST.BE.UNIQUE set, only do unique completion. FIRSTMATCH, if supplied, is the first match in
SPLST, and FIRSTCHAR the start of the current word being worked on)
(PROG (TAIL FIRSTMATCHCHARS SUFFIXCHARS LASTCHAR NEXTCHAR I WORD (UNIQUE T))
(RETURN (COND
([AND [OR FIRSTCHAR (SETQ FIRSTCHAR (COND
((AT.START.OF.BUF) (* Empty buffer. Allow altmode completion on one-word
splst here)
(AND (NOT CAUTIOUS)
\BUFFER))
(T (CURRENT.WORD]
(OR FIRSTMATCH (SETQ FIRSTMATCH (FIND.MATCHING.WORD SPLST FIRSTCHAR]
(* Completion may be possible. (CAR MATCH) is the first match in SPLST; FIRSTCHAR is buffer tail where current
word starts; NEXTCHAR is the relative position of cursor in current word, i.e. #chars in word + 1;
LASTCHAR is the last char position in common among all words which match. Now run through all other possible
matches with the current word, reducing LASTCHAR to indicate the largest segment in common.)
(SETQ NEXTCHAR (ADD1 (SEGMENT.LENGTH FIRSTCHAR \CURSOR)))
[SETQ LASTCHAR (NCHARS (SETQ FIRSTMATCH (INPART (CAR (SETQ TAIL FIRSTMATCH]
(COND
((OR CAUTIOUS (EQ (SUB1 NEXTCHAR)
LASTCHAR))
(* The latter case happens if the current word is exactly MATCH. In this case, if there are any other matches they
are with words containing MATCH as initial substring, and thus no further completion is possible)
(SETQ MUST.BE.UNIQUE T)))
(SETQ SUFFIXCHARS (FNTH (SETQ FIRSTMATCHCHARS (DCHCON FIRSTMATCH CHCONLST1))
NEXTCHAR))
(* unpack FIRSTMATCH for faster tests below. CHCONLST1 is Dwim's scratch list. If user often uses very long words,
may want to lengthen this list to reduce cons usage.)
(while (SETQ TAIL (FIND.MATCHING.WORD (CDR TAIL)
FIRSTCHAR \CURSOR))
do (COND
(MUST.BE.UNIQUE (RETURN)))
(SETQ UNIQUE)
(SETQ WORD (INPART (CAR TAIL)))
[COND
((find old I from NEXTCHAR to LASTCHAR as REFERENCE in SUFFIXCHARS
suchthat (NEQ (NTHCHARCODE WORD I)
REFERENCE))
(COND
((EQ I NEXTCHAR) (* No characters in common, so give up)
(RETURN))
(T (* reset LASTCHAR to last common character)
(SETQ LASTCHAR (SUB1 I]
finally
(* * chars from NEXTCHAR to LASTCHAR are uniquely determined by prefix so far)
(END.DELETE.MODE)
[PROG ((BUF FIRSTCHAR)
RETYPEIT OLDLENGTH NEEDADJUST)
(SETQ I 1)
LP1
(* * Scan old part of string (part user has typed already) to make sure case is correct)
(COND
[(EQ I NEXTCHAR) (* Done with first part now. Before we go on, retype
anything that needed it)
[COND
((AND RETYPEIT DISPLAYTERMFLG)
(* If we're capable of backspacing, go back and write
over input with correct case)
(GO.TO.RELATIVE (IDIFFERENCE \CURSORCOL OLDLENGTH))
[COND
(\VARIABLEFONT (SETQ NEEDADJUST
(TTADJUSTWIDTH (IDIFFERENCE
(SEGMENT.BIT.LENGTH
RETYPEIT \CURSOR)
OLDLENGTH)
\CURSOR]
(TYPE.BUFFER RETYPEIT \CURSOR)
(COND
(NEEDADJUST (ADJUSTLINE.AND.RESTORE]
(COND
((IGREATERP I LASTCHAR)
(* Happens when entire word is complete as stands)
(RETURN]
(T [COND
((NEQ (CAR FIRSTMATCHCHARS)
(CAR BUF))
(* Case mismatch, want to fix)
(FRPLACA BUF (CAR FIRSTMATCHCHARS))
(COND
((NOT RETYPEIT)
(SETQ RETYPEIT BUF)
(SETQ OLDLENGTH (SEGMENT.BIT.LENGTH RETYPEIT
\CURSOR]
(SETQ FIRSTMATCHCHARS (CDR FIRSTMATCHCHARS))
(SETQ BUF (CDR BUF))
(ADD1VAR I)
(GO LP1)))
LP2 (* Now do second half, the completion part: add new
chars from NEXTCHAR thru LASTCHAR)
(ADDCHAR (CAR FIRSTMATCHCHARS))
(COND
((NEQ I LASTCHAR)
(SETQ FIRSTMATCHCHARS (CDR FIRSTMATCHCHARS))
(ADD1VAR I)
(GO LP2]
[COND
((AND UNIQUE (NOT CAUTIOUS))
(* word is unique, so delimit as well)
(ADDCHAR (CHARCODE SPACE))
(COND
((AND \SPLSTFLG (NEQ NEXTCHAR 1))
(* Spelling list maintenance: user completed on this word, so move to front of spelling list.
Don't do it in the trivial case of filling in the entire word uniquely (as when doing LASTWORD))
(MOVETOP FIRSTMATCH (OR SPLST USERWORDS]
(RETURN (OR (AND UNIQUE FIRSTMATCH)
T])
(TTCRLF
[LAMBDA NIL (* bvm: "12-MAR-81 16:35")
(* * Prints a crlf, updating cursor appropriately)
(DO.CRLF)
(TTCRLF.ACCOUNT])
(TTCRLF.ACCOUNT
[LAMBDA NIL (* bvm: "28-JUL-83 00:58")
(SETQ \CURSORROW (ADD1 \CURSORROW))
[COND
((EQ (IPLUS \LOC.ROW.0 \CURSORROW)
\TTPAGELENGTH) (* This crlf glitched the screen, so row 0 has moved up
one)
(COND
((ILESSP (SETQ \LOC.ROW.0 (SUB1 \LOC.ROW.0))
0)
(* tty scrolling is such that if the window had been a non-integral height, the scroll was less than one full
line. Adjust \BMARG appropriately)
(SETQ \BMARG (DSPYPOSITION NIL \DSP]
(SETQ \CURSORCOL 0])
(TTDELETECHAR
[LAMBDA NIL (* bvm: "20-FEB-82 22:36")
(COND
((AT.START.OF.BUF)
(BEEP))
[(AT.END.OF.LINE)
(COND
[(AT.START.OF.LINE) (* empty line: need to delete to previous line)
(PROG ((PREV (PREVLINE \ARROW 1))
DODELETE)
(SETQ DODELETE (OVERFLOWLINE? PREV))
(DELETELINE \ARROW) (* get rid of this line)
(MOVE.TO.LINE PREV (fetch END of PREV)) (* go to end of previous line)
(COND
(DODELETE (* We were on overflow line, so have to delete the last
char, too)
(DELETETO (TTNLEFT \CURSOR 1)))
((NOT (CAPABILITY? MOVEMENT))
(RETYPE.BUFFER \ARROW]
(T (DELETETO (TTNLEFT \CURSOR 1]
((INSERTING)
(TTRUBOUT))
(T (* DELETE inside line is like <edit>DELETE.)
(DO.EDIT.COMMAND 177Q])
(TTDELETELINE
[LAMBDA NIL (* bvm: "20-FEB-82 22:36")
(COND
((EMPTY.BUFFER)
(BEEP))
[(EMPTY.LINE) (* Empty line: delete previous line if at end)
(COND
((AT.END.OF.BUF)
(MOVE.TO.LINE (PREVLINE \ARROW 1))
(COND
((NOT DISPLAYTERMFLG)
(TTBOUT ←)
(DO.CRLF)))
(DELETE.TO.END))
(T (BEEP]
(T (SETQ \INSERTING)
(SETTAIL? T)
(COND
((NOT DISPLAYTERMFLG)
(TTBOUT # #) (* On non-display just print ## and return to initial
position)
[replace END of \ARROW with (SETQ \CURSOR (SETQ \ENDBUFFER (fetch START of \ARROW]
(replace LASTCOL of \ARROW with (fetch FIRSTCOL of \ARROW))
(RETYPE.BUFFER \ARROW))
((AT.END.OF.LINE) (* kill back to start of line.
This can work on glass tty, too, whereas next clause
doesn't)
(DELETETO (fetch START of \ARROW)))
(T (* We're inside line, so go back to start and then zap
whole line)
(MOVE.BACK.TO (fetch START of \ARROW))
(FORWARD.DELETE.TO (fetch END of \ARROW])
(TTDELETEWORD
[LAMBDA NIL (* bvm: "20-FEB-82 22:21")
(COND
((NOT (AT.END.OF.LINE)) (* Somewhere inside line, so do this as fancy edit
command)
(DO.EDIT.COMMAND (CHARCODE ↑W)))
((EMPTY.LINE)
(BEEP))
(T (DELETETO (PREVWORD \CURSOR])
(TTECHO.TO.FILE
[LAMBDA (FILE DRIBBLING)
(DECLARE (USEDFREE \FIRSTLINE \PROMPT1 \PROMPT2 \ENDBUFFER))
(* bvm: " 5-SEP-83 18:23")
(* * Echos input to FILE. If DRIBBLING is true, the prompts are also echoed)
(for (OFD ←(GETOFD FILE))
(LINE ← \FIRSTLINE)
(FIRSTIME ← T)
X END
do (COND
([AND DRIBBLING (SETQ X (COND
(FIRSTIME (SETQ FIRSTIME NIL)
(AND (NOT \NOPROMPT)
\PROMPT1))
(T \PROMPT2]
(PRIN1 X FILE)))
(SETQ END (fetch END of LINE))
(SETQ X (fetch START of LINE))
(until (EQ X END)
do [COND
((EQ (CAR X)
(PREFIXCHARCODE SPACE)) (* pseudo-tab kludge: instead of printing the "real"
character, ignore it and print only its padding spaces)
(SETQ X (CDR X]
(BOUT OFD (LOGAND (CAR X)
177Q))
(SETQ X (TTNEXTCHAR X)))
(SETQ LINE (fetch NEXTLINE of LINE))
(COND
((OR DRIBBLING (NEQ (fetch START of LINE)
END)) (* Don't terpri on overflow line, since user didn't;
except always do it to dribblefile, since that's what's
on the screen)
(TERPRI FILE)))
repeatwhile (AND LINE (OR (EQ END \ENDBUFFER)
(PROGN (* Avoid echoing the terminating empty line, except when
it is an empty overflow line)
(NEQ (fetch START of LINE)
\ENDBUFFER])
(TTGIVEHELP
[LAMBDA (HELPKEY) (* bvm: "20-FEB-82 22:22")
(RESETLST (PROG ((CTRLO! CTRLO!))
(RESETSAVE (OUTPUT T))
(COND
((AND (NOT CTRLO!)
(FGETD (QUOTE CTRLO!))) (* Enable ↑O interrupt unless already done)
(RESETSAVE (INTERRUPTCHAR 17Q (QUOTE (CTRLO!))
T))
(SETQ CTRLO! T)))
(TERPRI)
(COND
((EQ HELPKEY T)
(TTGIVEHELP1))
[(LISTP HELPKEY)
(COND
((EQ (CAR HELPKEY)
T) (* List SPLST first, then subsequent blurb)
(TTGIVEHELP1 T)
(PRIN1 (QUOTE % ))
(TTGIVEHELP2 (CDR HELPKEY)
T))
((EQ (CDR HELPKEY)
T) (* Similar, but blurb first)
(TTGIVEHELP2 (CAR HELPKEY)
T)
[COND
((NOT (ZEROP (POSITION)))
(PRIN1 (QUOTE % ]
(TTGIVEHELP1 T T))
(T (TTGIVEHELP2 HELPKEY]
(T (TTGIVEHELP2 HELPKEY)))
(COND
((NOT (ZEROP (POSITION)))
(TERPRI)))
(TERPRI)
(RETURN T])
(TTGIVEHELP1
[LAMBDA (NO.OTHER NO.INTRO) (* bvm: "11-MAR-81 21:36")
(COND
(SPLST (OR NO.INTRO (PRIN1 "Please select from among "))
(for X on SPLST unless (OR (EQ X SPELLSTR1)
(EQ X SPELLSTR2))
do (PRIN1 (INPART (CAR X)))
(AND (CDR X)
(PRIN1 ", ")))
(COND
((NOT NO.OTHER)
(OR \FIX (PRIN1 ", or other"))
(TERPRI])
(TTGIVEHELP2
[LAMBDA (HELPKEY MIXED) (* bvm: " 8-Aug-80 00:14")
(COND
[[OR (LITATOM HELPKEY)
(AND (STRINGP HELPKEY)
(NOT (STRPOS (QUOTE % )
HELPKEY] (* Atom or spaceless string is a hashfile key)
(COND
((NOT (DISPLAYHELP HELPKEY))
(OR MIXED (PRIN1 "Sorry, no help available."]
(T (SPRINTT HELPKEY (COND
(MIXED (* no extra space)
0)
(T 4))
4 0])
(TTLASTLINE
[LAMBDA NIL (* bvm: "11-MAR-81 21:37")
(* * Returns last LINE record in buffer)
(PROG ((LINE \FIRSTLINE)
L)
LP (COND
((SETQ L (fetch NEXTLINE of LINE))
(SETQ LINE L)
(GO LP)))
(RETURN LINE])
(TTLOADBUF
[LAMBDA (BUF) (* bvm: "20-Mar-84 13:31")
(* BUF is a list, a la READBUF, which is loaded into our character buffer, using DCHCON to convert the
s-expressions therein to char codes. If we are READING, then uses PRIN2 pnames, i.e. includes escape chars and
such stuff. Alternatively, BUF may be a string, in which case its contents are also loaded into the buffer, a la
BKSYSBUF, and the setting of \READING is irrelevant)
(COND
[(EQ (CAR (LISTP BUF))
HISTSTR1) (* read from file. BUF is (<histstr1>
(file start . end)))
(SETQ BUF (CADR BUF))
(SETFILEPTR (CAR BUF)
(CADR BUF))
(bind CHAR NEXTCH (STREAM ←(GETSTREAM (CAR BUF)))
(#CHARS ←(IDIFFERENCE (CDDR BUF)
(CADR BUF)))
while (IGREATERP #CHARS 0)
do (add #CHARS -1)
(COND
((NEQ (SETQ CHAR (BIN STREAM))
(CHARCODE CR))
(ADDNAKEDCHAR CHAR T))
(T (* eat up the lf after the cr)
(COND
([OR (ZEROP #CHARS)
(PROGN (SETQ NEXTCH (BIN STREAM))
(AND (ILEQ (add #CHARS -1)
0)
(EQ NEXTCH (CHARCODE LF]
(* Ignore final CR)
(RETURN)))
(ADDNAKEDCHAR CHAR)
(COND
((NEQ NEXTCH (CHARCODE LF))
(ADDNAKEDCHAR NEXTCH]
(T (PROG (START END)
[COND
((AND (LISTP BUF)
(SETQ START (FMEMB HISTSTR0 BUF))) (* HISTSTR0 is a marker used by lispx to denote end of
line)
(FRPLACD (NLEFT BUF 1 START]
(SETQ START (DCHCON BUF (CDR \ENDBUFFER)
(AND (LISTP BUF)
\READING)
T)) (* Use our own buffer as a scratchlist for DCHCON as
long as it's lying around anyway.)
[COND
((LISTP BUF) (* Remove the surrounding parens from the outer list)
(SETQ END (NLEFT (SETQ START (CDR START))
1]
(* now detach the result from our buffer to avoid conflict of interest. If DCHCON found our scratchlist
inadequate, START will not be a tail of \ENDBUFFER so the NLEFT below comes out NIL, which is also fine)
(FRPLACD (NLEFT \ENDBUFFER 1 START)) (* Now unread the CHCON list.)
(READFROMBUF START END])
(TTNEXTCHAR
[LAMBDA (BUF) (* bvm: " 2-MAY-81 16:14")
(* Returns next true tail of BUF. Chars that take up more than one element of buf are represented as <real char
with 200Q bit on> followed by the chars in the print representation, each with the 400Q bit on.
Since TTNEXTCHAR is called from lots of places and wants to look like CDR, it is hand-coded here.)
(COND
((ZEROP (LOGAND (CAR BUF)
200Q)) (* normal situation, take cdr)
(CDR BUF))
(T
(* Was a prefix char (200Q bit on). Skip now over pad chars (400Q bit on). Need to also test for ENDBUFFER, since
buffer could coincidentally contain random garbage with the pad bit on)
[do (SETQ BUF (CDR BUF)) repeatuntil (OR (EQ BUF \ENDBUFFER)
(ZEROP (LOGAND (CAR BUF)
400Q]
BUF])
(TTNEXTLINE
[LAMBDA (LINE N) (* bvm: "20-FEB-82 23:25")
(bind L while (AND (NOT (ZEROP N))
(SETQ L (fetch NEXTLINE of LINE)))
do (SETQ LINE L)
(SUB1VAR N)
finally (RETURN LINE])
(TTNEXTNODE
[LAMBDA (BUF) (* bvm: " 2-JUN-82 15:44")
(* * Returns cdr of BUF, tacking on a new cons if the cdr was NIL)
(OR (CDR BUF)
(CDR (FRPLACD BUF (CONS 0])
(TTNLEFT
[LAMBDA (BUF N START) (* bvm: "20-FEB-82 22:34")
(* * Backs up N real characters in this line before BUF as far as START, default being the current start of the
line. Assumes BUF is a tail of line and N is small)
(OR START (SETQ START (fetch START of \ARROW)))
(PROG ((X START)
(B START))
LP (* Advance X by N chars)
(COND
((ZEROP N)
(GO LP1))
((OR (EQ X BUF)
(NULL X)) (* The NULL case should never happen, but better be
safe)
(RETURN B)))
(SETQ X (TTNEXTCHAR X))
(SUB1VAR N)
(GO LP)
LP1 (* Now advance X and B in parallel until X reaches BUF,
at which point B is N before it)
(COND
((OR (EQ X BUF)
(NULL X))
(RETURN B)))
(SETQ X (TTNEXTCHAR X))
(SETQ B (TTNEXTCHAR B))
(GO LP1])
(TTNTH
[LAMBDA (BUF N) (* bvm: "20-FEB-82 22:34")
(* * Advances N real characters in BUF as far as the end of the line)
(bind (END ←(fetch END of \ARROW)) while (AND (NOT (ZEROP N))
(NEQ BUF END))
do (SETQ BUF (TTNEXTCHAR BUF))
(SUB1VAR N)
finally (RETURN BUF])
(TTNTHLINE
[LAMBDA (N)
(DECLARE (USEDFREE \FIRSTLINE)) (* bvm: " 1-JUN-82 14:29")
(for (LINE ← \FIRSTLINE) do (COND
((ILEQ N 0)
(RETURN LINE))
(T (SETQ N (SUB1 N))
(SETQ LINE (OR (fetch NEXTLINE of LINE)
(RETURN LINE])
(TTPRIN1
[LAMBDA (STR) (* bvm: " 2-JUN-82 00:41")
(* * PRIN1 of STR, atom or string, directly to the terminal, bypassing any dribble file)
(PROG [(N (COND
(\VARIABLEFONT (STRINGWIDTH STR \FONT))
(T (ITIMES (NCHARS STR)
\CHARWIDTH]
(COND
((IGEQ (IPLUS \CURSORCOL N)
\RMARG)
(TTCRLF)))
[for I from 1 do (TTBOUT (OR (NTHCHARCODE STR I)
(RETURN]
(add \CURSORCOL N])
(TTPRIN2
[LAMBDA (EXPR CARLVL CDRLVL) (* bvm: "26-SEP-83 12:38")
(SELECTQ (TYPENAME EXPR)
(STRINGP (TTPRIN1 (QUOTE %"))
(TTPRIN1 EXPR)
(TTPRIN1 (QUOTE %")))
(LITATOM (TTPRIN1 EXPR))
[LISTP (OR CARLVL (SETQ CARLVL 12Q))
(OR CDRLVL (SETQ CDRLVL 12Q))
(COND
((ILEQ CARLVL 0)
(TTPRIN1 (QUOTE &)))
(T (TTPRIN1 (QUOTE %())
[do (TTPRIN2 (CAR EXPR)
(SUB1 CARLVL)
(SUB1 CDRLVL))
(COND
((NLISTP (SETQ EXPR (CDR EXPR)))
(COND
(EXPR (TTPRIN1 " . ")
(TTPRIN2 EXPR)))
(RETURN))
(T (TTPRIN1 (QUOTE % ))
(COND
((ILEQ (SETQ CDRLVL (SUB1 CDRLVL))
0)
(TTPRIN1 "--")
(RETURN]
(TTPRIN1 (QUOTE %)]
(MAPC (UNPACK EXPR T RDTBL)
(QUOTE TTPRIN1])
(TTPROMPTCHAR
[LAMBDA (LINE) (* bvm: "11-MAR-81 21:43")
(* * Prints the prompt for indicated LINE)
(CLEAR.LINE?)
(COND
((SETQ LINE (COND
((EQ LINE \FIRSTLINE)
\PROMPT1)
(T \PROMPT2)))
(TTPRIN1 LINE])
(TTRATOM
[LAMBDA NIL (* bvm: "20-FEB-82 22:34")
(* * Reads next atom from BUFFER, advancing it suitably)
(COND
((EQ (TTSKIPSEPR)
\ENDBUFFER)
null)
(T (PROG ((PACKBUF \ENDBUFFER)
PREVBUF CH) (* PACKBUF is where we will build up the chars of the
atom)
LP (COND
((EQ \BUFFER \ENDBUFFER)
(GO DONE)))
(SELECTC (SETQ CH (REALBITS (CAR \BUFFER)))
[BREAKCODES (* Break chars: parens, brackets, quote)
(COND
((AND (EQ CH (CHARCODE ,))
\READING) (* Comma does not break a read)
)
[(EQ PACKBUF \ENDBUFFER)
(* No atom read yet, so the break char is it)
(RETURN (PROG1 (FCHARACTER CH)
(SETQ \BUFFER (CDR \BUFFER]
(T (GO DONE]
(SEPRCODES (* separators terminate scan)
(GO DONE))
[(CHARCODE %%) (* escape to quote next char)
(COND
([OR \READING (AND (NEQ (CDR \BUFFER)
\ENDBUFFER)
(EQ (CADR \BUFFER)
(CHARCODE ?]
(SETQ \BUFFER (CDR \BUFFER]
NIL)
(FRPLACA PACKBUF (REALBITS (CAR \BUFFER)))
(SETQ PACKBUF (TTNEXTNODE (SETQ PREVBUF PACKBUF)))
(SETQ \BUFFER (TTNEXTCHAR \BUFFER))
(GO LP)
DONE(RETURN (COND
((EQ PACKBUF (CDR \ENDBUFFER))
(FCHARACTER (CAR \ENDBUFFER)))
(T (FRPLACD PREVBUF)
(PROG1 (PACKC \ENDBUFFER)
(FRPLACD PREVBUF PACKBUF])
(TTREAD
[LAMBDA NIL (* bvm: "20-FEB-82 22:36")
(* Reads starting at BUFFER, advancing \BUFFER past what is read. If unmatched paren/bracket encountered, leaves
it. Returns the distinguished value null, a null string, if there is nothing to read)
(PROG (X)
(TTSKIPSEPR)
(RETURN (COND
((NEQ \BUFFER \ENDBUFFER)
(SELCHARQ (REALBITS (CAR \BUFFER))
[(%( %[)
(TTREADLIST (PROG1 (CAR \BUFFER)
(SETQ \BUFFER (CDR \BUFFER]
((%) %])
null)
[%" (SETQ X (OR (FIND.MATCHING.QUOTE (SETQ \BUFFER (CDR \BUFFER))
\ENDBUFFER)
\ENDBUFFER))
(PROG1 (TTYINSTRING \BUFFER X)
(SETQ \BUFFER (CDR X]
[' (* Do QUOTE readmacro)
(SETQ \BUFFER (CDR \BUFFER))
(COND
((AND (NOT (SPACEP (CAR \BUFFER)))
(NEQ (SETQ X (TTREAD))
null))
(LIST (QUOTE QUOTE)
X))
(T (* The quote was followed by "space", right
paren/bracket, or end of line)
(QUOTE ']
[↑Y (* ↑Y evaluates next thing in input)
(SETQ \BUFFER (TTNEXTCHAR \BUFFER))
(COND
((NEQ (SETQ X (TTREAD))
null)
(STKEVAL (QUOTE TTYIN)
X))
(T (FCHARACTER (CHARCODE ↑Y]
(TTRATOM)))
(T null])
(TTREADLIST
[LAMBDA (OPENCHAR) (* bvm: "25-AUG-81 00:15")
(* * Read a list of elements. OPENCHAR is the character that started the list (paren or bracket) or NIL if none.)
(PROG (RESULT TAIL X)
LP (COND
((EQ (TTSKIPSEPR)
\ENDBUFFER)
(RETURN RESULT)))
LP2 (SELCHARQ (CAR \BUFFER)
(%) (* right paren terminates list;
eat it up to match open paren)
[COND
(OPENCHAR (SETQ \BUFFER (CDR \BUFFER]
(RETURN RESULT))
(%] (* right bracket. Only eat it if started with bracket)
[COND
((EQ OPENCHAR (CHARCODE %[))
(SETQ \BUFFER (CDR \BUFFER]
(RETURN RESULT))
[%. (* dot. if isolated and followed by one element, denotes
dotted cdr)
(COND
((AND RESULT OPENCHAR (NEQ (CDR \BUFFER)
\ENDBUFFER)
(SPACEP (CADR \BUFFER)))
(SETQ \BUFFER (CDDR \BUFFER)) (* Looks good so far; skip over dot)
(COND
((EQ (SETQ X (TTREAD))
null) (* nothing there)
(SETQ X (QUOTE %.))
(GO ADDELT))
((AND (NEQ (TTSKIPSEPR)
\ENDBUFFER)
(SELCHARQ (CAR \BUFFER)
((%) %])
T)
NIL)) (* terminated correctly on closing paren.
do it)
(FRPLACD TAIL X)
(GO LP2))
(T (* There's more there, so treat the dot as ordinary
atom)
[FRPLACD TAIL (SETQ TAIL (CONS (QUOTE %.]
(GO ADDELT]
NIL)
(SETQ X (TTREAD)) (* scan next element)
ADDELT
(SETQ X (CONS X)) (* Now tack onto end of RESULT, doing open NCONC1 here)
(COND
(RESULT (FRPLACD TAIL X))
(T (SETQ RESULT X)))
(SETQ TAIL X)
(GO LP])
(TTRUBOUT
[LAMBDA NIL (* bvm: "19-MAR-81 12:02")
(* * Delete the previous character -- this is the interpretation of DELETE while inserting)
(COND
((AT.START.OF.LINE)
(BEEP))
(T (BACKWARD.DELETE.TO (TTNLEFT \CURSOR 1])
(TTSKIPSEPR
[LAMBDA (END) (* bvm: "16-SEP-82 15:38")
(* * Skip \BUFFER over any separator chars, returning new value)
(while (AND (NEQ \BUFFER \ENDBUFFER)
(NEQ \BUFFER END)
(SPACEP (CAR \BUFFER)))
do (SETQ \BUFFER (CDR \BUFFER)))
\BUFFER])
(TTSKREAD
[LAMBDA (BUF END) (* bvm: " 5-SEP-83 18:23")
(OR END (SETQ END \ENDBUFFER))
(bind X while (NEQ BUF END)
do
(* * Simulates READLINE starting at BUF, returning tail of BUF where the read would terminate, or NIL if the read
does not terminate before END (default \ENDBUFFER))
(SELCHARQ (CAR BUF)
[(%( %[) (* open paren/bracket)
(SETQ X (CAR BUF))
(COND
((OR (NOT (SETQ BUF (TTSKREAD (CDR BUF)
END)))
(EQ BUF END)) (* paren/bracket not closed)
(RETURN))
((AND (EQ (CAR BUF)
135Q)
(NEQ X (CHARCODE %[))) (* left paren terminated by right bracket)
(RETURN BUF]
((%) %]) (* closing paren/bracket)
(RETURN BUF))
[%" (COND
((NOT (SETQ BUF (FIND.MATCHING.QUOTE (CDR BUF)
END)))
(RETURN]
[%% (* % skip over without looking)
(COND
((EQ (SETQ BUF (CDR BUF))
END)
(RETURN]
NIL)
(SETQ BUF (CDR BUF))
finally (RETURN BUF])
(TTUNREADBUF
[LAMBDA NIL
(DECLARE (USEDFREE \CURSOR \ENDBUFFER)) (* bvm: "20-FEB-82 22:34")
(* * Takes contents of buffer from \CURSOR onward and "unreads" it, i.e. erases it and simulates terminal input, a
la BKSYSBUF)
[for X←\CURSOR by (TTNEXTCHAR X) until (EQ X \ENDBUFFER) do (BKSYSCHAR0 (REALBITS (CAR X]
(DELETE.TO.END])
(TTWAITFORINPUT
[LAMBDA (MSECS RETKEYFLG) (* bvm: "24-Aug-84 16:03")
(* Waits for mouse or keystroke. If MSECS is non-NIL, waits a maximum of that many milliseconds.
If RETKEYFLG is true, returns the input (if there is some), otherwise just T without reading input.
Mouse buttons are returned as funny codes)
(GLOBALRESOURCE (\TTWAITBOX)
(PROG ((NOW (\CLOCK0 \TTWAITBOX))
(REG (DSPCLIPPINGREGION NIL \DSP))
X Y FN ABSY W)
LP [COND
((\SYSBUFP)
(\BOXIPLUS (LOCF (fetch KEYBOARDWAITTIME of \MISCSTATS))
(CLOCKDIFFERENCE NOW))
(RETURN (COND
(RETKEYFLG (\GETKEY))
(T T]
(GETMOUSESTATE)
[COND
((AND (LASTMOUSESTATE (OR RED YELLOW BLUE))
(IGEQ (SETQ X (LASTMOUSEX \DSP))
0)
(ILESSP X (fetch WIDTH of REG))
(IGEQ (SETQ Y (IDIFFERENCE (SETQ ABSY (LASTMOUSEY \DSP))
(fetch BOTTOM of REG)))
0)
(ILESSP Y (IPLUS (fetch HEIGHT of REG)
\CHARHEIGHT))
(SETQ W (WHICHW LASTMOUSEX LASTMOUSEY))
(EQ (WINDOWPROP W (QUOTE DSP))
\DSP)) (* Bugged inside this window)
(* The IPLUS is a grotesque kludge to include the title bar. Problem is that REG needs to be the clipping region,
not the window region, because we get mouse coordinates in DSP terms, not window terms. Damn Dedit typein buffer)
(* * The WHICHW test is so that we don't fight the scrollbar handler, or anyone else who happens to be on top of
this window. Really should have monitorlock on mouse)
(COND
[(AND (NOT (EMPTY.BUFFER))
(ILESSP ABSY (IPLUS \BMARG (ITIMES (IDIFFERENCE \TTPAGELENGTH
\LOC.ROW.0)
\CHARHEIGHT)))
(ILESSP Y (fetch HEIGHT of REG))
(IGEQ Y (IDIFFERENCE (ITIMES (IDIFFERENCE
\TTPAGELENGTH
(IPLUS \LOC.ROW.0
(fetch ROW
of (TTLASTLINE))
1))
\CHARHEIGHT)
4)))
(* Pointing inside text region. The second ILESSP is in case the text region overflows the window, we still want
title bar to be for menu)
(\BOXIPLUS (LOCF (fetch KEYBOARDWAITTIME of \MISCSTATS))
(CLOCKDIFFERENCE NOW))
(COND
((NOT RETKEYFLG)
(RETURN T))
(T (DO.MOUSE)
(GO LP]
([AND (WINDOWWORLD)
(SETQ FN (COND
((LASTMOUSESTATE (ONLY BLUE))
(OR (fetch (TTYINBUFFER TTOLDRIGHTFN) of \TTYINSTATE)
(FUNCTION DOWINDOWCOM)))
(T (fetch (TTYINBUFFER TTOLDBUTTONFN) of \TTYINSTATE]
(* Pointing in our window, but outside text--do regular
button stuff)
(ERSETQ (APPLY* FN (WHICHW)))
(COND
((NEQ \RMARG (SETQ \RMARG (DSPRIGHTMARGIN NIL \DSP)))
(* Window was reshaped)
(DO.EDIT.PP)
(SETQ REG (DSPCLIPPINGREGION NIL \DSP]
(COND
((AND (FIXP MSECS)
(IGREATERP (CLOCKDIFFERENCE NOW)
MSECS))
(\BOXIPLUS (LOCF (fetch KEYBOARDWAITTIME of \MISCSTATS))
(CLOCKDIFFERENCE NOW))
(RETURN NIL)))
(\TTYBACKGROUND)
(GO LP])
(TTYINSTRING
[LAMBDA (BUF TAIL) (* bvm: "20-FEB-82 22:34")
(* * Returns a string consisting of the "real" chars in buffer from BUF to TAIL or end of buffer.
If BUF = TAIL returns a null string)
(OR TAIL (SETQ TAIL \ENDBUFFER))
(bind ($$VAL ←(ALLOCSTRING (BUFCHARCOUNT BUF TAIL \READING))) for X←BUF by (TTNEXTCHAR X)
as I from 1 until (EQ X TAIL) do [COND
((AND \READING (EQ (CAR X)
(CHARCODE %%)))
(* % to quote next char)
(SETQ X (CDR X]
(RPLCHARCODE $$VAL I (REALBITS (CAR X])
(TYPE.BUFFER
[LAMBDA (START END) (* bvm: " 1-JUN-82 18:23")
(* * Types buffer from START to END, returning number of chars typed. Assumes no CR's)
(bind ($$VAL ← 0)
WIDTH while (NEQ START END) do (COND
((NOT (PREFIXCHAR (CAR START)))
(TTBOUT (CAR START))
[add \CURSORCOL (SETQ WIDTH (TTBITWIDTH
(REALBITS (CAR START]
(add $$VAL WIDTH)))
(SETQ START (CDR START])
(U-CASECODE
[LAMBDA (CHAR) (* bvm: "11-MAR-81 22:06")
(COND
([AND [NOT (ILESSP CHAR (CONSTANT (CHCON1 (QUOTE a]
(NOT (IGREATERP CHAR (CONSTANT (CHCON1 (QUOTE z]
(LOGAND CHAR 137Q))
(T CHAR])
(U/L-CASE
[LAMBDA (N CAPFLG)
(DECLARE (USEDFREE \CURSOR \ARROW)) (* bvm: "20-Mar-84 11:21")
(* * UPPER or lower-case N words. CAPFLG=T for uppercase; CAPFLG=1 for just capitalization)
(COND
((AND (EQ N 1750Q)
(AT.END.OF.LINE))
(* $U or $L at end of line means do it to the whole line. This handles the common situation where you have typed
several words in the wrong case and want to fix them without backing up to the beginning)
(MOVE.BACK.TO (fetch START of \ARROW)))
(T (MOVE.TO.START.OF.WORD))) (* Go to start of current word)
(PROG ((NEXTWD (CHECK.MARGIN (FIND.NEXT.WORD \CURSOR N)))
NEEDADJUST OLDLENGTH)
[COND
(\VARIABLEFONT (* Notice how long it is now)
(SETQ OLDLENGTH (SEGMENT.BIT.LENGTH \CURSOR NEXTWD]
(for (BUF ←(PROGN \CURSOR))
CHAR until (EQ BUF NEXTWD)
do [COND
((AND [NOT (PREFIXCHAR (SETQ CHAR (CAR BUF]
(IGREATERP CHAR 100Q))
(FRPLACA BUF (COND
(CAPFLG (COND
((EQ CAPFLG 1) (* only raise first char of word)
(SETQ CAPFLG NIL)))
(U-CASECODE CHAR))
(T (L-CASECODE CHAR]
(SETQ BUF (TTNEXTCHAR BUF)))
[COND
(\VARIABLEFONT (SETQ NEEDADJUST (TTADJUSTWIDTH (IDIFFERENCE (SEGMENT.BIT.LENGTH \CURSOR
NEXTWD)
OLDLENGTH)
NEXTWD]
(TYPE.BUFFER \CURSOR (SETQ \CURSOR NEXTWD))
(COND
(NEEDADJUST (ADJUSTLINE.AND.RESTORE])
(WORD.MATCHES.BUFFER
[LAMBDA (WORD START BUFTAIL) (* bvm: "20-FEB-82 22:35")
(* * True if WORD matches chars in buffer from START to BUFTAIL)
(for I from 1 as BTAIL←START by (TTNEXTCHAR BTAIL) bind CHAR until (EQ BTAIL BUFTAIL)
always (OR (EQ (SETQ CHAR (NTHCHARCODE WORD I))
(CAR BTAIL))
(AND CHAR (EQ (LOGXOR CHAR 40Q)
(CAR BTAIL))
(IGEQ CHAR (CHARCODE A))
(ILEQ CHAR (CHARCODE z])
)
(RPAQQ TTDISPLAYFNS (&DISPLAYCOMMENT CAPABILITY? BEEP BITBLT.DELETE BITBLT.ERASE BITBLT.INSERT
DO.CRLF DO.DELETE.LINES DO.DOWN DO.INSERT.LINE DO.LF DO.UP
ERASE.SCREEN ERASE.TO.END.OF.LINE ERASE.TO.END.OF.PAGE
INSERT.TEXT INSERTNCHARS TTDELSECTION TTADJUSTWIDTH
TTINSERTSECTION TTSETCURSOR))
(DEFINEQ
(&DISPLAYCOMMENT
[LAMBDA NIL (* bvm: " 8-Mar-80 16:37")
(* The display-dependent functions follow. These are the functions to change to add new terminal types.
You'll probably also want to change DISPLAYTERMP to include the new type, or at least set DISPLAYTYPES correctly.
The types that TTYIN currently knows about, together with their internal codes (the value of DISPLAYTERMFLG) are -
1: Datamedia -- can do anything asked in this package -
2: Heath -- can display anything, but has no edit key -
0: glass tty -- any terminal capable of at least backspacing and overprinting, so that the sequence BS, SPACE, BS
will delete a character.)
(* * The main body of TTYIN relies only on certain primitive operations, encoded according to terminal type in the
functions that follow. It uses the function CAPABILITY? to decide whether the terminal can perform a function it is
considering)
(* * The functions included herein assume you are running no faster than 2400-baud. Some functions need considerably
more padding at 9600-baud, although if you're on tops20 in page mode the Heath will send ↑S and ↑Q to survive
anyway. The main thing that taxes the Heath is ADJUSTLINE trying to justify several lines at once.
DM has biggest problem with Insert Line)
])
(CAPABILITY?
[NLAMBDA (TYPE ON.DISPLAY.FLG) (* bvm: "19-MAR-81 12:06")
(* * true if terminal has the indicated capability. This is a compiler macro that tests for appropriate values of
DISPLAYTERMFLG; if ON.DISPLAY.FLG is true, the macro may assume that DISPLAYTERMFLG is already non-NIL.
TYPE may be -
ERASE.TO.END -- terminal can erase to end of line -
\CURSOR -- terminal has addressable cursor -
MOVEMENT -- terminal permits cursor to move freely about page (up, down, left, right); \CURSOR is assumed to imply
MOVEMENT -
EDIT -- terminal can send EDIT bit (200Q) -
I/D.CHAR -- terminal has insert/delete character ability -
-
This package currently assumes that if the terminal can "edit", i.e. get into the edit-character routines, then it
has ERASE.TO.END, as well as insert/delete line, and preferably \CURSOR as well. For just "glass tty" operation,
existence of ERASE.TO.END and \CURSOR are the only relevant things; they may optimize large deletes
(↑Q and ↑W). Minimal display requirement is physical backspace; otherwise DISPLAYTERMFLG must be NIL.)
(SELECTQ TYPE
(MOVEMENT T)
(ERASE.TO.END T)
(I/D.CHAR T)
(\CURSOR T)
NIL])
(BEEP
[LAMBDA (DS) (* bvm: "27-JUL-83 23:20")
(RESETFORM (VIDEOCOLOR (NOT (VIDEOCOLOR)))
(DISMISS 310Q])
(BITBLT.DELETE
[LAMBDA (X Y WIDTH) (* bvm: " 1-JUN-82 16:34")
(PROG ((MOVEDWIDTH (IDIFFERENCE (IDIFFERENCE \RMARG X)
WIDTH))) (* First move everything from the right over to cursor
pos)
(BITBLT \DSP (IPLUS X WIDTH)
Y \DSP X Y MOVEDWIDTH \CHARHEIGHT (QUOTE INPUT)
(QUOTE REPLACE)) (* then delete the last WIDTH positions on the line.
May be unnecessary if they were already blank, might
want to check LASTCOL)
(BITBLT.ERASE (IPLUS X MOVEDWIDTH)
Y WIDTH \CHARHEIGHT])
(BITBLT.ERASE
[LAMBDA (LEFT BOTTOM WIDTH HEIGHT) (* bvm: " 1-JUN-82 15:10")
(BITBLT NIL NIL NIL \DSP LEFT BOTTOM WIDTH HEIGHT (QUOTE TEXTURE)
(QUOTE REPLACE)
\TEXTURE])
(BITBLT.INSERT
[LAMBDA (X Y WIDTH) (* bvm: " 5-SEP-83 17:41")
(BITBLT \DSP X Y \DSP (IPLUS X WIDTH)
Y
(IDIFFERENCE (IDIFFERENCE \RMARG X)
WIDTH)
\CHARHEIGHT
(QUOTE INPUT)
(QUOTE REPLACE))
(BITBLT.ERASE X Y WIDTH \CHARHEIGHT])
(DO.CRLF
[LAMBDA NIL (* bvm: " 2-MAR-82 22:38")
(SETQ \CURRENTDISPLAYLINE 0) (* Avoid stop scroll nonsense)
(\DSPPRINTCR/LF (CHARCODE CR)
\DSP])
(DO.DELETE.LINES
[LAMBDA (#LINES) (* bvm: "20-Mar-84 13:53")
(PROG ((TOTALHEIGHT (IDIFFERENCE (IPLUS (IDIFFERENCE (DSPYPOSITION NIL \DSP)
\DESCENT)
\CHARHEIGHT)
\BMARG))
(DELHEIGHT (ITIMES #LINES \CHARHEIGHT))) (* TOTALHEIGHT is distance from top of current line to
bottom of window. DELHEIGHT is height of lines being
removed.)
[COND
((IGREATERP DELHEIGHT TOTALHEIGHT) (* Delete everything from here down)
(SETQ DELHEIGHT TOTALHEIGHT))
(T (BITBLT \DSP 0 \BMARG \DSP 0 (IPLUS \BMARG DELHEIGHT)
\RMARG
(IDIFFERENCE TOTALHEIGHT DELHEIGHT)
(QUOTE INPUT)
(QUOTE REPLACE]
(BITBLT.ERASE 0 \BMARG \RMARG DELHEIGHT])
(DO.DOWN
[LAMBDA (#LINES) (* bvm: "25-AUG-81 00:24")
(* LF works on all terminals I know about)
(RELMOVETO 0 (IMINUS (ITIMES #LINES \CHARHEIGHT))
\DSP])
(DO.INSERT.LINE
[LAMBDA NIL (* bvm: "20-Mar-84 14:35")
(* * Inserts a new line on screen in front of current cursor row. The trickiness here is that unless there are
some blank lines at the bottom of the screen, we actually have to scroll upwards before we can insert downwards,
lest we lose the bottom line. Leaves cursor at start of new blank line.)
(PROG ((DY (IDIFFERENCE (DSPYPOSITION NIL \DSP)
\DESCENT)))
[COND
((EQ (IPLUS \LOC.ROW.0 (fetch ROW of (TTLASTLINE))
1)
\TTPAGELENGTH) (* Bottom line is occupied, so scroll stuff above us
upward)
(add DY \CHARHEIGHT)
(MOVETO (DSPXPOSITION NIL \DSP)
(IPLUS DY \DESCENT)
\DSP)
(BITBLT \DSP 0 DY \DSP 0 (IPLUS DY \CHARHEIGHT)
\RMARG
(IDIFFERENCE (fetch (REGION TOP) of (DSPCLIPPINGREGION NIL \DSP))
(IPLUS DY \CHARHEIGHT))
(QUOTE INPUT)
(QUOTE REPLACE))
(SETQ \LOC.ROW.0 (SUB1 \LOC.ROW.0)) (* Top line of buffer has moved up one)
)
(T (* Shove everything at or below current line down one)
(BITBLT \DSP 0 (IPLUS \BMARG \CHARHEIGHT)
\DSP 0 \BMARG \RMARG (IDIFFERENCE DY \BMARG)
(QUOTE INPUT)
(QUOTE REPLACE] (* and clear this line)
(BITBLT.ERASE 0 DY \RMARG \CHARHEIGHT])
(DO.LF
[LAMBDA NIL (* bvm: "25-AUG-81 00:25")
(\DSPPRINTCR/LF (CHARCODE LF)
\DSP])
(DO.UP
[LAMBDA (#LINES) (* bvm: "25-AUG-81 00:25")
(RELMOVETO 0 (ITIMES #LINES \CHARHEIGHT)
\DSP])
(ERASE.SCREEN
[LAMBDA NIL (* bvm: "30-JUN-81 16:08")
(DSPRESET \DSP])
(ERASE.TO.END.OF.LINE
[LAMBDA NIL (* bvm: "25-AUG-81 00:27")
(PROG ((X (DSPXPOSITION NIL \DSP)))
(BITBLT.ERASE X (IDIFFERENCE (DSPYPOSITION NIL \DSP)
\DESCENT)
(IDIFFERENCE \RMARG X)
\CHARHEIGHT])
(ERASE.TO.END.OF.PAGE
[LAMBDA NIL (* bvm: "20-Mar-84 13:44")
(* * Erases from current cursor position to end of page.)
(ERASE.TO.END.OF.LINE)
(PROG ((BELOW (IDIFFERENCE (IDIFFERENCE (DSPYPOSITION NIL \DSP)
\DESCENT)
\BMARG)))
(COND
((IGREATERP BELOW 0)
(BITBLT.ERASE 0 \BMARG \RMARG BELOW])
(INSERT.TEXT
[LAMBDA (START END ENDOFLINE) (* bvm: " 4-JUN-82 13:43")
(* * Inserts on screen the contents of buffer from START to END. Text from END to ENDOFLINE is the remainder of
the line, in case it's more economical to just retype the line than do the insertion)
(COND
((EQ END ENDOFLINE)
(TYPE.BUFFER START ENDOFLINE))
(T (TTINSERTSECTION (SEGMENT.BIT.LENGTH START END))
(TYPE.BUFFER START END])
(INSERTNCHARS
[LAMBDA (N CHAR) (* bvm: " 4-JUN-82 13:43")
(* * Inserts N copies of CHAR in front of existing text)
(TTINSERTSECTION (ITIMES N (TTBITWIDTH CHAR)))
(TTBOUTN N CHAR])
(TTDELSECTION
[LAMBDA (WIDTH) (* bvm: " 1-JUN-82 16:43")
(* * Deletes WIDTH bits at current pos)
(BITBLT.DELETE (DSPXPOSITION NIL \DSP)
(IDIFFERENCE (DSPYPOSITION NIL \DSP)
\DESCENT)
WIDTH])
(TTADJUSTWIDTH
[LAMBDA (DELTA END) (* bvm: " 4-JUN-82 18:15")
(* Expand or shrink line at current cursorpos by DELTA. END, if supplied, is the end of the section being
adjusted; if it is the end of the current line, then it is assumed that expansion is cheap.
Returns true if anything was done)
(COND
((NOT (ZEROP DELTA))
(COND
((ILESSP DELTA 0) (* Line has shrunk)
(TTDELSECTION (IMINUS DELTA)))
((NEQ END (fetch END of \ARROW)) (* Line has expanded, so need to spread it if not at the
end)
(TTINSERTSECTION DELTA)))
(add (fetch LASTCOL of \ARROW)
DELTA)
T])
(TTINSERTSECTION
[LAMBDA (WIDTH) (* bvm: " 1-JUN-82 14:15")
(* * Inserts WIDTH character positions, leaving cursor at start of insertion)
(BITBLT.INSERT (DSPXPOSITION NIL \DSP)
(IDIFFERENCE (DSPYPOSITION NIL \DSP)
\DESCENT)
WIDTH])
(TTSETCURSOR
[LAMBDA (COL ROW) (* bvm: " 1-JUN-82 22:56")
(* * Sets cursor to absolute screen position COL,ROW)
(MOVETO (IPLUS COL \LMARG)
(IPLUS (ITIMES (SUB1 (IDIFFERENCE \TTPAGELENGTH ROW))
\CHARHEIGHT)
\BMARG)
\DSP])
)
(* Mouse handling)
(DEFINEQ
(DO.MOUSE
[LAMBDA NIL (* lmm " 3-May-84 10:32")
(* Called when mouse is clicked down inside of our region; performs it as an edit command, returning T, or returns
NIL if it is not a legal mouse call. The commands that actually change something display their intent while the
button is down and are not actually executed until button is released.)
(COND
([NOT (ZEROP (LOGAND LASTKEYBOARD (LOGOR \SHIFTKEYS \CTRLKEY]
(DO.SHIFTED.SELECTION))
[(LASTMOUSESTATE (ONLY RED)) (* Position cursor)
(bind ROW/COL while (SETQ ROW/COL (TTRACKMOUSE ROW/COL)) when (LISTP ROW/COL)
do (\CHECKCARET \DSP)
(MOVE.TO.LINE (CAR ROW/COL)
(CDR ROW/COL]
[(LASTMOUSESTATE (ONLY YELLOW)) (* Position cursor by word)
(bind NEWPOS BUF COL LINE while (SETQ NEWPOS (TTRACKMOUSE NEWPOS)) when (LISTP NEWPOS)
do (\CHECKCARET \DSP)
[SETQ BUF (BRACKET.CURRENT.WORD (SETQ LINE (fetch ROWPOS of NEWPOS))
(SETQ COL (fetch COLPOS of NEWPOS]
(MOVE.TO.LINE LINE (COND
((IGREATERP (SEGMENT.BIT.LENGTH (CAR BUF)
COL)
(SEGMENT.BIT.LENGTH COL (CDR BUF)))
(CDR BUF))
(T (CAR BUF]
((LASTMOUSESTATE (ONLY BLUE)) (* zap from cursor to mouse location.)
(DO.SHIFTED.SELECTION (QUOTE DELETE])
(DO.SHIFTED.SELECTION
[LAMBDA (INITMODE) (* lmm " 3-May-84 10:33")
(bind START END SAVE EXTENDING MODE NEWSTART NEWEND COL NEWROW NEWMODE BUF NEWPOS WORDLEVEL
ENDLINE
while (OR (NEQ (LOGAND LASTKEYBOARD (LOGOR \SHIFTKEYS \CTRLKEY))
0)
(LASTMOUSESTATE (NOT UP)))
do (SETQ NEWPOS (TTRACKMOUSE NEWPOS))
(\TTYBACKGROUND) (* Flash caret)
(COND
[(LASTMOUSESTATE (OR RED YELLOW)) (* Start new selection)
(COND
[(AND (LISTP NEWPOS)
(NEQ (SETQ COL (fetch COLPOS of NEWPOS))
\ENDBUFFER)) (* There is a selection)
(SETQ NEWSTART (create MOUSEPOS using NEWPOS))
(SETQ NEWROW (fetch ROWPOS of NEWPOS))
(COND
((OR (LASTMOUSESTATE (ONLY RED))
(EQ COL (fetch END of NEWROW))) (* Selection extends to next char)
(SETQ NEWEND (TTNEXTPOS NEWROW COL))
(SETQ WORDLEVEL NIL))
(T (* Selection is current "word")
(SETQ BUF (BRACKET.CURRENT.WORD NEWROW (fetch COLPOS of NEWSTART)))
(replace COLPOS of NEWSTART with (CAR BUF))
(* Start of previous word)
(SETQ NEWEND (create MOUSEPOS
ROWPOS ← NEWROW
COLPOS ←(CDR BUF)))
(SETQ WORDLEVEL T)))
(SETQ NEWMODE (COND
((ZEROP (LOGAND LASTKEYBOARD \CTRLKEY))
(QUOTE SELECT))
((ZEROP (LOGAND LASTKEYBOARD \SHIFTKEYS))
(QUOTE DELETE))
(T (QUOTE MOVE]
(T (SETQ NEWSTART NIL)))
(COND
((OR (NEQPOS START NEWSTART)
(NEQPOS END NEWEND)
(NEQ MODE NEWMODE))
(COND
(START (* turn off old selection)
(INVERT.LONG.SEGMENT START END MODE)))
(COND
((SETQ START NEWSTART)
(INVERT.LONG.SEGMENT START (SETQ END NEWEND)
(SETQ MODE NEWMODE]
[(LASTMOUSESTATE (ONLY BLUE)) (* Extend selection)
[COND
((NOT START) (* No selection, extend from cursor)
[SETQ NEWSTART (SETQ NEWEND (SETQ START
(SETQ END (create MOUSEPOS
ROWPOS ← \ARROW
COLPOS ← \CURSOR]
(SETQ WORDLEVEL (SETQ EXTENDING NIL))
(COND
(INITMODE (SETQ MODE INITMODE) (* E.g. in DO.MOUSE on BLUE)
(SETQ INITMODE))
(T (SETQ MODE (COND
((ZEROP (LOGAND LASTKEYBOARD \CTRLKEY))
(QUOTE SELECT))
((ZEROP (LOGAND LASTKEYBOARD \SHIFTKEYS))
(QUOTE DELETE))
(T (QUOTE MOVE]
(SETQ NEWROW (fetch ROWPOS of NEWPOS))
(COND
[(NLISTP NEWPOS) (* No selection; cancel any existing extension)
(COND
(EXTENDING (COND
((NEQPOS START NEWSTART)
(INVERT.LONG.SEGMENT NEWSTART START MODE)
(SETQ NEWSTART START))
((NEQPOS END NEWEND)
(INVERT.LONG.SEGMENT END NEWEND MODE)
(SETQ NEWEND END)))
(SETQ EXTENDING NIL]
(T (COND
((TTBEFOREPOS NEWPOS START) (* Extending to left of original selection)
(COND
((AND EXTENDING (NEQPOS END NEWEND))
(* We were extending to right, so switch)
(INVERT.LONG.SEGMENT END NEWEND MODE)
(SETQ NEWEND END)))
(INVERT.LONG.SEGMENT NEWSTART (SETQ NEWSTART (create MOUSEPOS using NEWPOS))
MODE))
(T (* Extending to right)
(COND
((AND EXTENDING (NEQPOS START NEWSTART))
(* We were extending to left, so switch)
(INVERT.LONG.SEGMENT START NEWSTART MODE)
(SETQ NEWSTART START)))
(INVERT.LONG.SEGMENT NEWEND (SETQ NEWEND (TTNEXTPOS NEWROW
(fetch COLPOS
of NEWPOS)))
MODE)))
(SETQ EXTENDING T]
(EXTENDING (* End of extension, make NEWSTART/END permanent)
(SETQ START NEWSTART)
(SETQ END NEWEND)
(SETQ EXTENDING NIL)))
finally (COND
(START (* There is a selection, so do it)
(\CHECKCARET \DSP)
(PROG ((STARTBUF (fetch COLPOS of START))
(ENDBUF (fetch COLPOS of END)))
(COND
[(EQ MODE (QUOTE SELECT))
(INVERT.LONG.SEGMENT START END MODE)
(* Take it as typein)
(COND
((BEFOREBUF STARTBUF \CURSOR ENDBUF)
(* Can't just unread, because structure will change as
we do so)
(READFROMBUF (COPY.SEGMENT STARTBUF ENDBUF)))
(T (READFROMBUF STARTBUF ENDBUF T]
((AND (EQ MODE (QUOTE MOVE))
(BEFOREBUF STARTBUF \CURSOR ENDBUF))
(* Action overlaps cursor, so effect is just to move
cursor)
(INVERT.LONG.SEGMENT START END MODE)
(MOVE.TO.LINE (fetch ROWPOS of END)
ENDBUF))
(T
(* Delete or move selection, insert it as typein at cursor for the latter. We save away the selection in
\LAST.DELETION to be restored later if desired)
(SETQ SAVE (COND
((BEFOREBUF STARTBUF \CURSOR ENDBUF)
(* The delete will move \CURSOR into trash heap)
STARTBUF)
(T \CURSOR)))
(SETQ \LAST.DELETION (SETQ BUF (COPY.SEGMENT STARTBUF ENDBUF)))
(* Save selection)
(DELETE.LONG.SEGMENT START END)
(MOVE.TO.WHEREVER SAVE) (* Come back to where cursor is
(may have moved))
(AND (EQ MODE (QUOTE MOVE))
(READFROMBUF BUF NIL T])
(COPY.SEGMENT
[LAMBDA (START END) (* bvm: " 4-DEC-81 17:04")
(for TAIL←START by (CDR TAIL) until (EQ TAIL END) collect (CAR TAIL])
(DELETE.LONG.SEGMENT
[LAMBDA (START END) (* bvm: "15-JUN-82 17:59")
(DELETE.LONG.SEGMENT1 (fetch ROWPOS of START)
(fetch COLPOS of START)
(fetch ROWPOS of END)
(fetch COLPOS of END])
(DELETE.LONG.SEGMENT1
[LAMBDA (STARTLINE STARTCOL ENDLINE ENDCOL) (* bvm: "15-JUN-82 17:58")
(PROG (FIRSTLINE NEXTLINE NROWS)
(COND
([ZEROP (SETQ NROWS (IDIFFERENCE (fetch ROW of ENDLINE)
(fetch ROW of STARTLINE]
(* All on one line)
(MOVE.TO.LINE STARTLINE STARTCOL)
(FORWARD.DELETE.TO ENDCOL))
(T (MOVE.TO.LINE (SETQ FIRSTLINE (fetch NEXTLINE of STARTLINE)))
(DO.DELETE.LINES NROWS) (* Delete excess lines)
(SETQ NEXTLINE (fetch NEXTLINE of ENDLINE))
(replace NEXTLINE of STARTLINE with NEXTLINE)
(RENUMBER.LINES NEXTLINE (ADD1 (fetch ROW of STARTLINE)))
[add (fetch LASTCOL of STARTLINE)
(IDIFFERENCE (SEGMENT.BIT.LENGTH ENDCOL (fetch END of ENDLINE))
(SEGMENT.BIT.LENGTH STARTCOL (fetch END of STARTLINE]
(replace END of STARTLINE with (fetch END of ENDLINE))
(COND
((EQ ENDCOL (fetch END of STARTLINE))
(replace END of STARTLINE with STARTCOL)))
(KILLSEGMENT STARTCOL ENDCOL)
(replace NEXTLINE of ENDLINE with NIL)
(KILL.LINES FIRSTLINE)
(MOVE.TO.LINE STARTLINE STARTCOL)
(ERASE.TO.END.OF.LINE)
(COND
((ILESSP (fetch LASTCOL of STARTLINE)
\RMARG)
(TYPE.BUFFER STARTCOL (fetch END of STARTLINE)))
(T (TYPE.BUFFER STARTCOL (NTH.COLUMN.OF STARTLINE \RMARG))
(ADJUSTLINE NIL STARTLINE])
(INVERT.LONG.SEGMENT
[LAMBDA (START END MODE) (* bvm: "25-FEB-82 15:57")
(COND
((NOT (EQPOS START END))
(OR (TTBEFOREPOS START END)
(swap START END))
(PROG ((COL (fetch COLPOS of START))
(ROW (fetch ROWPOS of START)))
(while (NEQ ROW (fetch ROWPOS of END)) do (INVERT.SEGMENT COL
(fetch START
of (fetch NEXTLINE
of ROW))
ROW MODE T)
(SETQ ROW (fetch NEXTLINE of ROW))
(SETQ COL (fetch START of ROW)))
(INVERT.SEGMENT COL (fetch COLPOS of END)
ROW MODE T])
(INVERT.SEGMENT
[LAMBDA (START END LINE MODE NOSWAP)
(DECLARE (USEDFREE \ARROW \CHARWIDTH \LOC.ROW.0 \CHARHEIGHT \BMARG \LMARG))
(* bvm: " 1-JUN-82 18:36")
(COND
((NEQ START END)
(OR LINE (SETQ LINE \ARROW))
(OR MODE (SETQ MODE (QUOTE DELETE)))
(OR NOSWAP (BEFOREBUF START END (fetch END of LINE))
(swap START END))
(PROG ((LEFT (IPLUS (fetch FIRSTCOL of LINE)
(SEGMENT.BIT.LENGTH (fetch START of LINE)
START)
\LMARG))
(BOTTOM (IPLUS (ITIMES (SUB1 (IDIFFERENCE (IDIFFERENCE \TTPAGELENGTH \LOC.ROW.0)
(fetch ROW of LINE)))
\CHARHEIGHT)
\BMARG
(IMINUS \DESCENT)))
(WIDTH (SEGMENT.BIT.LENGTH START END)))
(BITBLT NIL NIL NIL \DSP LEFT BOTTOM WIDTH (COND
((NEQ MODE (QUOTE SELECT))
\CHARHEIGHT)
(T 2))
(QUOTE TEXTURE)
(QUOTE INVERT)
(COND
((NEQ MODE (QUOTE SELECT))
BLACKSHADE)
(T DOTSHADE)))
(COND
((EQ MODE (QUOTE MOVE))
(BITBLT NIL NIL NIL \DSP LEFT BOTTOM WIDTH 2 (QUOTE TEXTURE)
(QUOTE INVERT)
DOTSHADE])
(BRACKET.CURRENT.WORD
[LAMBDA (LINE COL) (* bvm: "26-FEB-82 17:03")
(* * Return dotted pair of columns indicating start and end of "word" containing buffer position COL of LINE)
(PROG ((INSPACES T)
(ENDLINE (fetch END of LINE))
(WSTART (fetch START of LINE))
FIRSTCOL LASTCOL)
(for BUF←WSTART by (TTNEXTCHAR BUF) until (EQ BUF ENDLINE)
do [COND
([NEQ INSPACES (SETQ INSPACES (WORDSEPRP (CAR BUF]
(* Change of state)
(COND
(FIRSTCOL (* Done)
(RETURN (SETQ LASTCOL BUF)))
(T (* Still looking for COL, note start of word)
(SETQ WSTART BUF]
(COND
((EQ BUF COL)
(SETQ FIRSTCOL WSTART)))
finally (* Got to end before word ended)
(SETQ LASTCOL ENDLINE)
(OR FIRSTCOL (SETQ FIRSTCOL LASTCOL)))
(OR (BEFOREBUF FIRSTCOL COL LASTCOL)
(HELP))
(RETURN (CONS FIRSTCOL LASTCOL])
(TTBEFOREPOS
[LAMBDA (X Y) (* bvm: " 2-MAR-82 13:18")
(COND
[(EQ (fetch ROWPOS of X)
(fetch ROWPOS of Y))
(AND (NEQ (fetch COLPOS of X)
(fetch COLPOS of Y))
(BEFOREBUF (fetch COLPOS of X)
(fetch COLPOS of Y)
(fetch END of (fetch ROWPOS of X]
(T (ILESSP (fetch ROW of (fetch ROWPOS of X))
(fetch ROW of (fetch ROWPOS of Y])
(TTNEXTPOS
[LAMBDA (LINE COL) (* bvm: "25-FEB-82 16:04")
(* * Makes a MOUSEPOS out of the position, if any, immediately after COL of LINE)
(COND
((AND (EQ COL (fetch END of LINE))
(NEQ COL \ENDBUFFER))
(create MOUSEPOS
ROWPOS ←(SETQ LINE (fetch NEXTLINE of LINE))
COLPOS ←(fetch START of LINE)))
(T (create MOUSEPOS
ROWPOS ← LINE
COLPOS ←(COND
((EQ COL \ENDBUFFER)
COL)
(T (TTNEXTCHAR COL])
(TTRACKMOUSE
[LAMBDA (OLDROW/COL) (* bvm: "23-MAR-83 15:37")
(DECLARE (USEDFREE \VARIABLEFONT \DSP \TTPAGELENGTH \LOC.ROW.0 \BMARG \CHARHEIGHT \LMARG \RMARG
\FONT))
(* Follows the mouse, returning whenever its row/col changes or the user lets up the mouse buttons.
Converts mouse coordinates into a dotted pair (LINE . BUFPOS) indicating what char is being pointed at, or T if
outside range of text. Returns NIL when user lets go. OLDROW/COL is the previous value of this routine, which we
may smash.)
(PROG (OLDX OLDY ROW COL OLDROW OLDCOL CURSORPOS)
[COND
((LISTP OLDROW/COL)
(SETQ OLDROW (CAR OLDROW/COL))
(SETQ OLDCOL (CDR OLDROW/COL]
LP (COND
((MOUSESTATE UP) (* everything up)
(RETURN)))
(SETQ CURSORPOS (CURSORPOSITION NIL \DSP CURSORPOS))
[COND
((OR (NEQ (CAR CURSORPOS)
OLDX)
(NEQ (CDR CURSORPOS)
OLDY)) (* Cursor moved)
[SETQ ROW (SUB1 (IDIFFERENCE (IDIFFERENCE \TTPAGELENGTH \LOC.ROW.0)
(IQUOTIENT (IDIFFERENCE (SETQ OLDY (CDR CURSORPOS))
\BMARG)
\CHARHEIGHT]
(SETQ OLDX (CAR CURSORPOS))
(COND
[(AND (IGEQ OLDX \LMARG)
(ILESSP OLDX \RMARG)
(IGEQ ROW 0))
(SETQ ROW (TTNTHLINE ROW))
[SETQ COL (COND
(\VARIABLEFONT (SETQ COL (IDIFFERENCE (IDIFFERENCE OLDX \LMARG)
(fetch FIRSTCOL of ROW)))
(bind WIDTH (BUF ←(fetch START of ROW))
(END ←(fetch END of ROW)) while (NEQ BUF END)
do [SETQ WIDTH (COND
((NOT (PREFIXCHAR (CAR BUF)))
(FCHARWIDTH (CAR BUF)
\FONT))
(T (SEGMENT.BIT.LENGTH BUF (TTNEXTCHAR BUF]
(COND
((ILESSP COL (LRSH WIDTH 1))
(RETURN BUF)))
(SETQ COL (IDIFFERENCE COL WIDTH))
(SETQ BUF (TTNEXTCHAR BUF))
finally (RETURN BUF)))
(T (NTH.COLUMN.OF ROW (IDIFFERENCE OLDX \LMARG]
(COND
((OR (NEQ ROW OLDROW)
(NEQ COL OLDCOL))
(RETURN (COND
((LISTP OLDROW/COL)
(FRPLNODE OLDROW/COL ROW COL))
(T (CONS ROW COL]
(T (COND
((NEQ OLDROW/COL T)
(RETURN T]
(\TTYBACKGROUND)
(GO LP])
)
(* Support functions. These are all macros or for debugging)
(RPAQQ TTSUPPORTFNS (ADD1POS INPART INSERTING TTBOUT TTBOUTN PR! PRALL PRBUF PRLINE))
(DEFINEQ
(ADD1POS
[LAMBDA (CHAR) (* bvm: " 1-JUN-82 17:12")
(add \CURSORCOL (TTBITWIDTH CHAR])
(INPART
[LAMBDA (X) (* bvm: " 3-Jul-78 12:27")
(* Given a "word" from the spelling list, returns that which would be input to TTYIN, i.e. if a dotted synonym pair,
its CAR, else the word itself)
(COND
((LISTP X)
(CAR X))
(T X])
(INSERTING
[LAMBDA NIL (* bvm: "19-MAR-81 12:09")
(* * True if explicitly in INSERT mode, or if we are in EMACS mode, where most characters self-insert)
(OR \INSERTING EMACSFLG])
(TTBOUT
[NLAMBDA CHARS (* bvm: "25-AUG-81 00:31")
(* Prints one or more characters to the terminal. Arguments may be: a number, an atom on DMCHARCODES, or a single
character; any other arg is simply evaluated)
(for $CH in CHARS do (BLTCHAR (LOGAND (COND
((FIXP $CH)
$CH)
((CDR (FASSOC $CH DMCHARCODES)))
((EQ (NCHARS $CH)
1)
(CHCON1 $CH))
(T (EVAL $CH)))
177Q)
\DSP)
(COND
((FIXP TTCLOCK) (* Slows down transmission rate for debugging)
(DISMISS TTCLOCK])
(TTBOUTN
[NLAMBDA $NCHARS (* bvm: " 4-Mar-80 01:35")
(FRPTQ (EVAL (CAR $NCHARS))
(APPLY (QUOTE TTBOUT)
(CDR $NCHARS])
(PR!
[LAMBDA NIL (* bvm: "17-Aug-78 01:23")
(for X in BUFFIELDS do (SPACES 2)
(PRIN1 (SETQ X (CAR X)))
(PRIN1 ": ")
(COND
((NLISTP (SETQ X (APPLY* (QUOTE !)
X)))
(PRINT X))
((SMALLP (CAR X))
(PRBUF X))
((LISTP (CAR X))
(PRLINE X))
(T (PRINT X)))
when (IGREATERP (CADR X)
2])
(PRALL
[LAMBDA NIL
(DECLARE (USEDFREE \FIRSTLINE)) (* bvm: "19-MAR-81 12:45")
(for (LINE ← \FIRSTLINE) by (fetch NEXTLINE of LINE) while LINE do (PRLINE LINE)
(TERPRI])
(PRBUF
[LAMBDA (BUF END N) (* bvm: "11-MAR-81 22:06")
[OR N (SETQ N (COND
(END 122Q)
(T 17Q]
(PRIN1 (QUOTE {))
(for I from 1 to N while (AND BUF (NEQ BUF END)) bind X do [COND
((NOT (SMALLP (CAR BUF)))
(RETURN (PRINT (QUOTE garbage]
[COND
((PREFIXCHAR (CAR BUF))
(PRIN1 (QUOTE ')))
((PADCHAR (CAR BUF))
(PRIN1 (QUOTE %"]
[COND
((ILESSP (SETQ X
(REALBITS (CAR BUF)))
40Q)
(PRIN1 (QUOTE ↑))
(SETQ X (LOGOR X 100Q]
(PRIN1 (FCHARACTER X))
(SETQ BUF (CDR BUF))
finally [COND
((AND BUF (NEQ BUF END))
(PRIN1 (QUOTE --]
(PRIN1 (QUOTE }))
(TERPRI])
(PRLINE
[LAMBDA (LINE) (* bvm: "25-AUG-81 17:29")
(PROG ((POS (POSITION T)))
(COND
((NOT LINE)
(SETQ LINE \ARROW)
(PRIN1 "(defaulting)
")))
(TAB POS T)
[PRIN1 (COND
((EQ LINE (EVALV (QUOTE \ARROW)))
(QUOTE ←))
(T (QUOTE % ]
(PRIN1 "Start: ")
(PRBUF (fetch START of LINE)
(fetch END of LINE))
(TAB POS T)
(PRIN1 " End: ")
(PRBUF (fetch END of LINE))
(TAB POS T)
(PRIN1 " First, last: ")
(PRIN2 (fetch FIRSTCOL of LINE))
(PRIN1 ", ")
(PRINT (fetch LASTCOL of LINE))
(TAB POS T)
(PRIN1 " Row: ")
(PRINT (fetch ROW of LINE))
(COND
((NEQ (fetch END of LINE)
(OR (LISTP (EVALV (QUOTE \ENDBUFFER)))
(fetch OLDTAIL of TTYINBUFFER)))
(TAB POS T)
(PRIN1 " Nextline: ")
(PRBUF (fetch START of (fetch NEXTLINE of LINE))
NIL 10Q])
)
(* Auxiliary fns. These are outside the TTYIN block, and are provided to aid the outside world
in special interfaces to TTYIN)
(DEFINEQ
(SETREADFN
[LAMBDA (FLG) (* bvm: "10-MAR-83 21:46")
(/SETATOMVAL (QUOTE LISPXREADFN)
(COND
((AND (NEQ FLG (QUOTE READ))
(OR FLG TTYINBSFLG (DISPLAYTERMP))
(FGETD (QUOTE TTYINREAD))
(DISPLAYSTARTEDP))
(QUOTE TTYINREAD))
(T (QUOTE READ])
(TTYINENTRYFN
[LAMBDA (WINDOW) (* bvm: "24-Aug-84 16:31")
(if (LASTMOUSESTATE (ONLY RIGHT))
then (PROG [(STATE (WINDOWPROP WINDOW (QUOTE TTYINSTATE]
(APPLY* (OR (AND STATE (fetch (TTYINWINDOWSTATE TTOLDRIGHTFN) of STATE))
(FUNCTION DOWINDOWCOM))
WINDOW))
else (GIVE.TTY.PROCESS WINDOW])
(TTYINREADP
[LAMBDA (FLG) (* bvm: "12-JUL-82 12:34")
(* * Intended to replace LISPXREADP. Does the right thing when READBUF has just a <cr> in it)
(COND
(READBUF (OR (NEQ (CAR READBUF)
HISTSTR0)
FLG))
((NOT (EOFP \LINEBUF.OFD))
(OR FLG (NEQ (\PEEKBIN \LINEBUF.OFD)
(CHARCODE EOL])
(TTYINREAD
[LAMBDA (FILE RDTBL) (* bvm: "20-Mar-84 11:27")
(COND
((AND TTYINDEBUGFLG \INSIDE.TTYIN) (* If debugging and TTYIN breaks, don't want to die)
(READ FILE RDTBL))
(T (PROG (X)
(RETURN (COND
((OR [do (COND
((EOFP \LINEBUF.OFD) (* Nothing in buffer)
(RETURN))
((NEQ (\PEEKBIN \LINEBUF.OFD)
(CHARCODE EOL)) (* significant stuff)
(RETURN T))
(T (\BIN \LINEBUF.OFD]
(EQ (SETQ X (TTYIN LISPXID NIL NIL (QUOTE (EVALQT FILLBUFFER NOPROMPT))
NIL NIL NIL RDTBL))
T))
(READ \LINEBUF.OFD RDTBL))
(T (* indicate null input)
(SETQ READBUF (NCONC1 (CDR X)
HISTSTR0))
(CAR X])
(TTYINFIX
[LAMBDA (INPUT COMS) (* bvm: "13-May-84 17:16")
(PROG (TAIL)
(RETURN (COND
([OR COMS (NEQ LISPXREADFN (QUOTE TTYINREAD))
(IGEQ (COUNT INPUT)
TTYINFIXLIMIT)
(CDR (SETQ TAIL (MEMB HISTSTR0 INPUT]
(NONTTYINLISPXFIX INPUT COMS))
((for X in [COND
((EQ TAIL (CDR INPUT))
(CAR INPUT))
(T (OR (LISTP (CADR INPUT))
(CDR INPUT]
thereis (LISTP X))
(TTYINEDIT (COND
(TAIL (LDIFF INPUT TAIL))
(T INPUT))
T
(QUOTE PRETTY)
LISPXID))
(T (TTYIN LISPXID NIL NIL (QUOTE EVALQT)
NIL NIL INPUT T])
(CHARMACRO?
[NLAMBDA (MACRO)
(DECLARE (USEDFREE \READING LISPXID)) (* bvm: "19-MAR-81 12:15")
(* * For use in a TTYINREADMACRO. If we are reading inside the editor, clear the output buffer and return MACRO)
(COND
((AND (EQ \READING (QUOTE EVALQT))
(EQ LISPXID (QUOTE *)))
(COND
((LISTP MACRO) (* a list of edit commands; we'd better copy)
(APPEND MACRO))
(T MACRO])
(TTYINMETA
[LAMBDA (FLG) (* bvm: " 4-NOV-83 20:28")
(PROG1 \TTYIN.METASTATE (COND
((AND FLG (DEFINEDP (QUOTE PEEKKEYS))) (* Non-wind, can't do)
(\ILLEGAL.ARG FLG)))
(METASHIFT FLG)
[COND
[FLG (SETQ \TTYIN.RESTOREBUFCODE 200Q)
[KEYACTION (QUOTE BLANK-MIDDLE)
(QUOTE ((200Q 200Q]
(COND
((EQ [CAAR (KEYACTION (QUOTE BLANK-TOP)
(QUOTE ((0 0]
EDITPREFIXCHAR)
(SETQ EDITPREFIXCHAR 0]
(T (SETQ \TTYIN.RESTOREBUFCODE 302Q)
[KEYACTION (QUOTE BLANK-MIDDLE)
(QUOTE ((302Q 302Q]
(COND
((EQ [CAAR (KEYACTION (QUOTE BLANK-TOP)
(QUOTE ((301Q 301Q]
EDITPREFIXCHAR)
(SETQ EDITPREFIXCHAR 301Q]
(SETQ \TTYIN.METASTATE FLG])
(\SET.TTYINBOLDFONT
[LAMBDA (PLAINFONT) (* bvm: "17-AUG-83 12:31")
(SETQ TTYINBOLDFONT (CONS PLAINFONT (OR [CAR (NLSETQ (COND
((EQ (FONTPROP PLAINFONT (QUOTE WEIGHT))
(QUOTE BOLD))
(FONTCOPY PLAINFONT (QUOTE WEIGHT)
(QUOTE NORMAL)))
(T (FONTCOPY PLAINFONT (QUOTE WEIGHT)
(QUOTE BOLD]
PLAINFONT])
(TTYIN.LASTINPUT
[LAMBDA NIL (* bvm: " 9-NOV-82 14:56")
(PROG [(BUF (AND (LISTP TTYINBUFFER)
(fetch OLDTAIL of TTYINBUFFER]
(RETURN (AND BUF (TTYINSTRING (fetch START of (fetch FIRSTLINE of TTYINBUFFER))
BUF])
)
(DEFINEQ
(TTED
[NLAMBDA (FN C)
(DECLARE (USEDFREE COM)) (* bvm: "22-Aug-84 16:36")
(* Does the ED macro, returning a com to execute if there is any change to be made. Can also be used for other
types of editor escapes if FN is supplied. FN{exprlist,com} is called to edit a list of expressions.
C is com)
(PROG ((EXPR (##))
(TOP (## ↑))
UP NEW N)
(SETQ COM (OR C (QUOTE ED)))
[COND
((NEQ TOP EXPR) (* would generate error if at top)
(SETQ UP (## UP] (* in case of error, will print ED ?, instead of some
long edit macro body)
[COND
((NEQ UP EXPR) (* If current expression is not a tail, pretend it is a
list of one expression)
(SETQ EXPR (LIST (COND
((AND (EQ (CAR (LISTP EXPR))
COMMENTFLG)
(LISTP (CADR EXPR))
(FIXP (CADDR EXPR))
(DEFINEDP (QUOTE GETCOMMENT)))
(* EXPR is a comment pointer, so get the real comment to
edit)
(GETCOMMENT EXPR))
(T EXPR]
(RETURN (COND
([NOT (SETQ NEW (COND
(FN (APPLY* FN EXPR C))
(T (TTYIN "** " NIL NIL (QUOTE LISPXREAD)
NIL NIL EXPR] (* Replace with nothing?)
(ERROR!))
((EQUAL NEW EXPR)
(PRIN1 "(not changed)
" T)
NIL)
[(OR (EQ EXPR UP)
(AND (EQ (CAR EXPR)
TOP)
(PROGN [COND
((CDR NEW) (* Replacing the top-level expression with more than one
expression. That is really an error, but this way we at
least avoid losing data)
(PRIN1
"(Note: replaced one expression with a list of several)
"
T))
(T (SETQ NEW (CAR NEW]
T))) (* Current expression is the top or a tail;
can't use simple : command.)
(CONS (QUOTE REPLACE)
(CONS (QUOTE (1 TO))
(CONS (QUOTE WITH)
NEW]
([AND (LISTP (CAR NEW))
(NOT (CDR NEW))
(SETQ N (MEMB (CAR EXPR)
(SETQ UP (## 0]
(* replacing an element with a list: if we did a : command, the editor would then be positioned at a tail, and
even if we did a (1 --) there would still be a tail in the edit chain. Better way to do this is thus to go up a
level and do the appropriate (n --) command and come back down. I wish the editor had a command to do this.)
(LIST (QUOTE COMSQ)
0
(CONS [SETQ N (for $$VAL←1 while (NEQ N UP)
do (ADD1VAR $$VAL)
(SETQ UP (CDR UP]
NEW)
N))
(T
(* Simple replacement of one element. Could be fancier and leave the current expression being the one just typed,
but that seems like a lot of bother)
(COND
((AND (CDR NEW)
(NOT (CDR EXPR))) (* Warn that one expression became several)
(PRIN1 "(new expressions spliced into parent)
" T)))
(CONS (QUOTE :)
NEW])
(DO.EE
[LAMBDA (EXPRS COM W) (* bvm: " 2-APR-82 14:31")
(TTYINEDIT EXPRS W])
(TTYINEDIT
[LAMBDA (EXPRS WINDOW PRINTFN PROMPT) (* bvm: "13-May-84 17:19")
(OR PRINTFN (SETQ PRINTFN TTYINPRINTFN))
(RESETLST (SET.TTYINEDIT.WINDOW WINDOW)
(RESETSAVE (CURSOR DEFAULTCURSOR)) (* Make sure we have something to point with)
(PROG1 (TTYIN (OR PROMPT TTYINEDITPROMPT)
NIL NIL (QUOTE LISPXREAD)
NIL NIL [COND
([OR (EQ PRINTFN T)
(AND (NULL PRINTFN)
(NULL (CDR EXPRS))
(STRINGP (CAR EXPRS]
(* Don't prettyprint it)
EXPRS)
(T (LIST HISTSTR1 (TTYIN.PPTOFILE EXPRS PRINTFN]
EDITRDTBL)
(COND
((AND TTYINAUTOCLOSEFLG WINDOW)
(CLOSEW WINDOW])
(SIMPLETEXTEDIT
[LAMBDA (FILE WINDOW) (* bvm: "18-JUN-82 14:29")
(RESETLST (PROG ([INPUTFILE (AND FILE (OPENFILE FILE (QUOTE INPUT]
SCRATCHOUT MAINOUTPUT)
(AND INPUTFILE (RESETSAVE NIL (LIST (QUOTE CLOSEF)
INPUTFILE)))
(SETQ SCRATCHOUT (TTYIN.SCRATCHFILE))
(SET.TTYINEDIT.WINDOW WINDOW)
(RETURN (COND
([TTYIN TTYINEDITPROMPT NIL NIL (QUOTE (TEXT NOVALUE))
SCRATCHOUT NIL (AND INPUTFILE
(LIST HISTSTR1 (CONS INPUTFILE
(CONS 0 (GETEOFPTR
INPUTFILE]
[repeatuntil (PROGN [SETQ MAINOUTPUT
(COND
(INPUTFILE (PROG1 (PACKFILENAME (QUOTE
VERSION)
NIL
(QUOTE BODY)
INPUTFILE)
(SETQ INPUTFILE)))
(T (CAR (TTYIN "Output file: " NIL
"Name of file for edited output"
(QUOTE (NORAISE READ]
(NLSETQ (SETQ MAINOUTPUT (OPENFILE MAINOUTPUT
(QUOTE OUTPUT]
(COPYBYTES SCRATCHOUT MAINOUTPUT 0 (GETFILEPTR SCRATCHOUT))
(CLOSEF MAINOUTPUT])
(SET.TTYINEDIT.WINDOW
[LAMBDA (WINDOW) (* bvm: " 2-JUN-82 16:11")
(* Changes output to WINDOW, or the TTYIN edit window, returning the resulting WINDOW, or NIL if there is no
window change. Caller must have RESETLST)
(COND
((EQ WINDOW T) (* Use current window)
NIL)
(T (SELECTQ (SYSTEMTYPE)
((ALTO D)
[OR WINDOW (SETQ WINDOW (OR TTYINEDITWINDOW (SETQ TTYINEDITWINDOW
(CREATEW NIL "Edit Work Area"]
(CLEARW WINDOW)
[PROG [(OFFSET (IREMAINDER (WINDOWPROP WINDOW (QUOTE HEIGHT))
(IMINUS (DSPLINEFEED NIL WINDOW]
(COND
((NEQ OFFSET 0)
(* Window is not an integral number of lines, so start down a little, so that bottom line will be correctly
aligned (we count from bottom of screen))
(RELMOVETO 0 (IMINUS OFFSET)
WINDOW]
(RESETSAVE (TTYDISPLAYSTREAM WINDOW))
WINDOW)
NIL])
(TTYIN.PPTOFILE
[LAMBDA (EXPRS PRINTFN) (* bvm: "22-Aug-84 16:39")
(DECLARE (GLOBALVARS TTYINEDIT.SCRATCH))
(* * Prettyprint each of EXPRS to a scratch file, returning (scratchfile start . end), as TTYIN would like)
(TTYIN.SCRATCHFILE)
[RESETLST (RESETSAVE (OUTPUT TTYINEDIT.SCRATCH))
(PROG [(LL (IDIFFERENCE (LINELENGTH NIL T)
(ADD1 (NCHARS TTYINEDITPROMPT]
(LINELENGTH LL TTYINEDIT.SCRATCH) (* Try to make comments print in middle when linelength
short)
(RESETSAVE PRETTYLCOM (IQUOTIENT LL 5)))
(RESETSAVE FONTCHANGEFLG NIL)
(COND
((AND PRINTFN (NEQ PRINTFN (QUOTE PRETTY)))
(APPLY* (COND
((EQ PRINTFN T)
(QUOTE PRINT))
(T PRINTFN))
EXPRS
(OUTPUT)))
(T (AND CHANGESARRAY (RESETSAVE CHANGESARRAY))
[COND
((AND (NEQ NORMALCOMMENTSFLG T)
(DEFINEDP (QUOTE GETCOMMENT))) (* If there are comments, force them to be prettyprinted
afresh at the new linelength;
ordinarily this won't happen with file output)
(RESETSAVE PRETTYPRINTMACROS (CONS (QUOTE (* . GETCOMMENT))
PRETTYPRINTMACROS]
(PRINTDEF EXPRS NIL T T]
(CONS TTYINEDIT.SCRATCH (CONS 0 (GETFILEPTR TTYINEDIT.SCRATCH])
(TTYIN.SCRATCHFILE
[LAMBDA NIL
(DECLARE (GLOBALVARS TTYINEDIT.SCRATCH)) (* bvm: "20-Mar-84 13:25")
[COND
([OR (NOT TTYINEDIT.SCRATCH)
(NOT (OPENP TTYINEDIT.SCRATCH (QUOTE BOTH]
(SELECTQ (SYSTEMTYPE)
[D (SETQ TTYINEDIT.SCRATCH (OPENSTREAM (QUOTE {NODIRCORE})
(QUOTE BOTH)
(QUOTE OLD/NEW]
(PROGN (SETQ TTYINEDIT.SCRATCH (OPENFILE (QUOTE TTYINEDIT.SCRATCH;S)
(QUOTE BOTH)
(QUOTE OLD/NEW)))
(WHENCLOSE TTYINEDIT.SCRATCH (QUOTE CLOSEALL)
(QUOTE NO)
(QUOTE BEFORE)
(FUNCTION [LAMBDA NIL
(SETQ TTYINEDIT.SCRATCH NIL])
(QUOTE AFTER)
(QUOTE DELFILE]
(SETFILEPTR TTYINEDIT.SCRATCH 0)
TTYINEDIT.SCRATCH])
)
(ADDTOVAR USERMACROS (EE (DUMMY)
(COMS (TTED DO.EE EE)))
(EE NIL (COMS (TTED DO.EE EE)))
(ED NIL (COMS (TTED)))
(BUF NIL (E [LISPXUNREAD (TTYIN (QUOTE *)
NIL NIL (QUOTE LISPXREAD)
NIL NIL (LIST (QUOTE E)
(##]
T)))
(ADDTOVAR EDITCOMSA EE ED BUF)
(ADDTOVAR EDITCOMSL EE)
(ADDTOVAR LISPXHISTORYMACROS [BUF NIL (TTYIN LISPXID NIL NIL (QUOTE EVALQT)
NIL NIL (LIST (COND (LISPXLINE (VALUOF LISPXLINE))
(T (CADDR (CAAR LISPXHISTORY])
(ADDTOVAR LISPXMACROS (TV (APPLY* (QUOTE EDITV)
(CAR LISPXLINE)
(QUOTE ED))))
(RPAQ? TTYINEDITWINDOW )
(RPAQ? TTYINEDIT.SCRATCH )
(RPAQ? TTYINEDITPROMPT T)
(RPAQ? TTYINAUTOCLOSEFLG )
(RPAQ? TTYINPRINTFN )
(RPAQ? TTYIN?=FN )
(ADDTOVAR AFTERSYSOUTFORMS (SETQ TTYINEDIT.SCRATCH NIL))
(DECLARE: DOEVAL@COMPILE DONTCOPY
(RPAQQ TTCOMPILETIME [(VARS TTYINBLOCKS)
(LOCALVARS . T)
(SPECVARS CTRLO! HELP SPLST \ARROW \AUTOFILL \BMARG \BUFFER \CHARHEIGHT \CHARWIDTH \COMMAND
\CURSOR \CURSORCOL \CURSORROW \DELETING \DESCENT \DSP \EDITBIT \ENDBUFFER
\FIRSTLINE \FIX \HOMECOL \HOMEROW \INITPOS \INSERTING \LASTAIL \LASTCHAR \LMARG
\LOC.ROW.0 \NOFIXSPELL \PROMPT1 \PROMPT2 \READING \REPEAT \RMARG \SPLSTFLG
\INSIDE.TTYIN \TTYINSTATE \TTPAGELENGTH \RAISEINPUT \FIRSTTIME \DONTCOMPLETE
\NOVALUE \STRINGVALUE \LISPXREADING \FILLINGBUFFER \RDTBLSA DIRECTORY/FILE
\LAST.DELETION \NOPROMPT \FONT \VARIABLEFONT \TEXTURE \LASTAILROW \LASTAILCOL)
(GLOBALVARS ?ACTIVATEFLG AFTERPROMPTCHARFORMS BLACKSHADE BUFFIELDS CAR/CDRNIL CHANGESARRAY
CHCONLST1 COMMENTFLG CTRLUFLG CTRLVFLG DISPLAYTYPES DMCHARCODES EDITCOMSL
EDITPREFIXCHAR EDITRDTBL EMACSFLG EOLCHARCODE FONTCHANGEFLG HISTSTR0 HISTSTR1
LASTKEYBOARD LASTMOUSEBUTTONS LASTWORD LISPXREADFN PROMPTCHARFORMS SHOWPARENFLG
SPELLSTR1 SPELLSTR2 TTCLOCK TTYINAUTOCLOSEFLG TTYINBOLDFONT TTYINBSFLG
TTYINBUFFER TTYINCOMMENTCHAR TTYINCOMPLETEFLG TTYINEDIT.SCRATCH TTYINEDITPROMPT
TTYINEDITWINDOW TTYINERRORSETFLG TTYINRAISEFLG TTYINREADMACROS TTYINRESPONSES
TTYINUSERFN TTYJUSTLENGTH TYPEAHEADFLG USERWORDS WHITESHADE \FIXP \MISCSTATS
\TTWAITBOX \TTYIN.EDITPREFIXCODE \TTYIN.METASTATE \TTYIN.RESTOREBUFCODE null
TTYINAUTOFILLMARGIN TTYINPRINTFN TTYIN?=FN TTYINFIXLIMIT TTYINDEBUGFLG)
(MACROS * TTYINMACROS)
(RECORDS LINE TTYINBUFFER TTYINWINDOWSTATE MOUSEPOS)
(VARS (TTCLOCK)
(CHANGESARRAY)
DMCHARCODES TTSUPPORTFNS)
(ADDVARS (DONTCOMPILEFNS &DISPLAYCOMMENT DELETETO1 DELNCHARS DO.BACK DO.DOWN DO.FORWARD
ADDSILENTCHAR INSERTSPACES))
(CONSTANTS (DISPLAYTERMFLG T)
(DIDESCAPECODE 433Q)
(PREFIXCODE 200Q)
(PADCODE 400Q)
(PSEUDOCRCODE 1040Q)
(CHECKNIL?)
BREAKCODES SEPRCODES (TTYINMAILFLG)
\CTRLKEY \SHIFTKEYS DOTSHADE)
(VARS TTNILFNS)
(P (FOR FN IN TTNILFNS DO (MOVD (QUOTE NILL)
FN)))
(MACROS * TTNILFNS)
(DECLARE: DONTEVAL@COMPILE
(TEMPLATES AT.END.OF.BUF AT.END.OF.LINE AT.START.OF.BUF AT.START.OF.LINE
EMPTY.BUFFER EMPTY.LINE INSERTING ON.FIRST.LINE ON.LAST.LINE PADCHAR
PADCHARCODE PREFIXCHAR PREFIXCHARCODE REALBITS SPACEP TTBOUT TTBOUTN
MOUSESTATE LASTMOUSESTATE CAPABILITY?)
(P (RADIX 10Q))
(LISPXMACROS ← ←B)
DONTEVAL@LOAD EVAL@COMPILE (VARS (DONTCOMPILEFNS (UNION (UNION TTYINMACROS
TTSUPPORTFNS)
DONTCOMPILEFNS])
(RPAQQ TTYINBLOCKS ((TTYIN TTYIN TTBIN TTCRLF TTCRLF.ACCOUNT SCANFORWARD TTNLEFT TTNTH TTPRIN1
TTPROMPTCHAR TTRATOM TTREAD TTREADLIST TTSKIPSEPR TTSKREAD TTYINSTRING
ADDCHAR ADDNAKEDCHAR AUTOCR? BACKWARD.DELETE.TO BEEP BUFTAILP CLEAR.LINE?
CREATE.LINE DELETE.TO.END DELETETO DELETETO1 DELNCHARS TTECHO.TO.FILE
END.DELETE.MODE ENDREAD? AT.END.OF.TEXT FIND.START.OF.WORD TTADJUSTWORD
FORWARD.DELETE.TO GO.TO.RELATIVE GO.TO.ADDRESSING GO.TO.FREELINE
INIT.CURSOR INSERT.CHAR.IN.BUF ADDCHARS.INSERTING INSERT.NODE TTRUBOUT
KILL.LINES KILLSEGMENT MOVE.BACK.TO MOVE.FORWARD.TO MOVE.TO.NEXT.LINE
START.NEW.LINE TTNEXTCHAR TTNEXTNODE OVERFLOW? PROPERTAILP RESTORE.CURSOR
SAVE.CURSOR SCRATCHCONS SETLASTC SETTAIL? SPACE/PARENP DO.EDIT.COMMAND
ADDSILENTCHAR ADDTAB AT.END.OF.SCREEN SCANBACK BACKSKREAD BREAKLINE
SEGMENT.LENGTH CHECK.MARGIN TTCOMPLETEWORD FIND.MATCHING.WORD NTHCHARCODE
DELETELINE DO?CMD DOTABS EDITCOLUMN FIND.LINE FIND.LINE.BREAK ADJUSTLINE
START.OF.PARAGRAPH? ADJUSTLINE.AND.RESTORE TTGIVEHELP TTGIVEHELP1
TTGIVEHELP2 INSERTLINE TTLASTLINE TTLOADBUF MOVE.TO.LINE
MOVE.TO.START.OF.WORD MOVE.TO.WHEREVER TTNEXTLINE FIND.MATCHING.QUOTE
FIND.NEXT.WORD NTH.COLUMN.OF NTH.RELATIVE.COLUMN.OF OVERFLOWLINE? PREVLINE
PREVWORD READFROMBUF RENUMBER.LINES RESTOREBUF RETYPE.BUFFER
SHOW.MATCHING.PAREN SKIP/ZAP SLEEP CURRENT.WORD TYPE.BUFFER U/L-CASE
TTUNREADBUF DO.BACK DO.DELETE.LINES DO.DOWN DO.FORWARD DO.INSERT.LINE
DO.UP ERASE.SCREEN ERASE.TO.END.OF.LINE ERASE.TO.END.OF.PAGE INSERT.TEXT
INSERTNCHARS TTSETCURSOR
(LOCALFREEVARS ARROW AUTOFILL BUFFER COMMAND CURSOR DELETING EDITBIT
ENDBUFFER INITPOS INSERTING NOFIXSPELL READING REPEAT)
(SPECVARS CTRLO!)
(LINKFNS . T)
(NOLINKFNS DISPLAYHELP DISPLAYTERMP EDITE ERROR! FIXSPELL!! GRIPE
GUESTUSER? MAILWATCH MWNOTE SETBACKSPACE SHOULDNT SMARTARGLIST
SPRINTT STKEVAL STRPOS USEREXEC XHELPSYS)
(BLKLIBRARY NLEFT))
(NIL TTYINREAD (LOCALVARS . T)
(LINKFNS TTYIN))
(NIL DISPLAYTERMP SETREADFN TTECHOMODE TTED TTYINPEEKC TTYINREADP TTYINREADPREP CHARMACRO?
(LOCALVARS . T))))
(DECLARE: DOEVAL@COMPILE DONTCOPY
(LOCALVARS . T)
)
(DECLARE: DOEVAL@COMPILE DONTCOPY
(SPECVARS CTRLO! HELP SPLST \ARROW \AUTOFILL \BMARG \BUFFER \CHARHEIGHT \CHARWIDTH \COMMAND \CURSOR
\CURSORCOL \CURSORROW \DELETING \DESCENT \DSP \EDITBIT \ENDBUFFER \FIRSTLINE \FIX \HOMECOL
\HOMEROW \INITPOS \INSERTING \LASTAIL \LASTCHAR \LMARG \LOC.ROW.0 \NOFIXSPELL \PROMPT1
\PROMPT2 \READING \REPEAT \RMARG \SPLSTFLG \INSIDE.TTYIN \TTYINSTATE \TTPAGELENGTH
\RAISEINPUT \FIRSTTIME \DONTCOMPLETE \NOVALUE \STRINGVALUE \LISPXREADING \FILLINGBUFFER
\RDTBLSA DIRECTORY/FILE \LAST.DELETION \NOPROMPT \FONT \VARIABLEFONT \TEXTURE \LASTAILROW
\LASTAILCOL)
)
(DECLARE: DOEVAL@COMPILE DONTCOPY
(ADDTOVAR GLOBALVARS ?ACTIVATEFLG AFTERPROMPTCHARFORMS BLACKSHADE BUFFIELDS CAR/CDRNIL CHANGESARRAY
CHCONLST1 COMMENTFLG CTRLUFLG CTRLVFLG DISPLAYTYPES DMCHARCODES EDITCOMSL EDITPREFIXCHAR
EDITRDTBL EMACSFLG EOLCHARCODE FONTCHANGEFLG HISTSTR0 HISTSTR1 LASTKEYBOARD
LASTMOUSEBUTTONS LASTWORD LISPXREADFN PROMPTCHARFORMS SHOWPARENFLG SPELLSTR1 SPELLSTR2
TTCLOCK TTYINAUTOCLOSEFLG TTYINBOLDFONT TTYINBSFLG TTYINBUFFER TTYINCOMMENTCHAR
TTYINCOMPLETEFLG TTYINEDIT.SCRATCH TTYINEDITPROMPT TTYINEDITWINDOW TTYINERRORSETFLG
TTYINRAISEFLG TTYINREADMACROS TTYINRESPONSES TTYINUSERFN TTYJUSTLENGTH TYPEAHEADFLG
USERWORDS WHITESHADE \FIXP \MISCSTATS \TTWAITBOX \TTYIN.EDITPREFIXCODE \TTYIN.METASTATE
\TTYIN.RESTOREBUFCODE null TTYINAUTOFILLMARGIN TTYINPRINTFN TTYIN?=FN TTYINFIXLIMIT
TTYINDEBUGFLG)
)
(RPAQQ TTYINMACROS (TYPEAHEAD? ADD1POS AT.END.OF.BUF AT.END.OF.LINE AT.START.OF.BUF AT.START.OF.LINE
BEFOREBUF BREAK.OR.SEPRP CAPABILITY? DISPLAYTERMP EMPTY.BUFFER
EMPTY.LINE EQPOS NEQPOS IABS INPART INSERTING ON.FIRST.LINE
ON.LAST.LINE PADCHAR PADCHARCODE PREFIXCHAR PREFIXCHARCODE REALBITS
SPACEP TTBOUT TTBOUTN WORDSEPRP FCHARWIDTH))
(DECLARE: EVAL@COMPILE
(PUTPROPS TYPEAHEAD? MACRO (NIL (\SYSBUFP)))
(PUTPROPS ADD1POS MACRO ((CHAR)
(add \CURSORCOL (TTBITWIDTH CHAR))))
(PUTPROPS AT.END.OF.BUF MACRO (NIL (EQ \CURSOR \ENDBUFFER)))
(PUTPROPS AT.END.OF.LINE MACRO (NIL (EQ (fetch END of \ARROW)
\CURSOR)))
(PUTPROPS AT.START.OF.BUF MACRO (NIL (EQ \CURSOR \BUFFER)))
(PUTPROPS AT.START.OF.LINE MACRO (NIL (EQ (fetch START of \ARROW)
\CURSOR)))
(PUTPROPS BEFOREBUF MACRO ((THIS THAT END)
(BUFTAILP THAT THIS END)))
(PUTPROPS BREAK.OR.SEPRP MACRO ((C)
(SELECTC (REALBITS C)
((APPEND SEPRCODES BREAKCODES)
T)
NIL)))
(PUTPROPS CAPABILITY? MACRO ((X Y)
T))
(PUTPROPS DISPLAYTERMP ALTOMACRO (NIL T))
(PUTPROPS EMPTY.BUFFER MACRO (NIL (EQ \BUFFER \ENDBUFFER)))
(PUTPROPS EMPTY.LINE MACRO [X (SUBST (OR (CAR X)
(QUOTE \ARROW))
(QUOTE \ARROW)
(QUOTE (EQ (fetch START of \ARROW)
(fetch END of \ARROW])
(PUTPROPS EQPOS MACRO [(X Y)
(AND (EQ (fetch COLPOS of X)
(fetch COLPOS of Y))
(EQ (fetch ROWPOS of X)
(fetch ROWPOS of Y])
(PUTPROPS NEQPOS MACRO ((X Y)
(NOT (EQPOS X Y))))
(PUTPROPS IABS MACRO [OPENLAMBDA (A)
(COND
((IGEQ A 0)
A)
(T (IMINUS A])
(PUTPROPS INPART MACRO (OPENLAMBDA (X)
(COND
((LISTP X)
(CAR X))
(T X))))
(PUTPROPS INSERTING MACRO (NIL (OR EMACSFLG \INSERTING)))
(PUTPROPS ON.FIRST.LINE MACRO (NIL (EQ \FIRSTLINE \ARROW)))
(PUTPROPS ON.LAST.LINE MACRO (NIL (EQ (fetch END of \ARROW)
\ENDBUFFER)))
(PUTPROPS PADCHAR MACRO [(CHAR)
(NOT (ZEROP (LOGAND CHAR 400Q])
(PUTPROPS PADCHARCODE MACRO [(CHAR)
(CONSTANT (IPLUS PADCODE (CHARCODE CHAR])
(PUTPROPS PREFIXCHAR MACRO [(CHAR)
(NOT (ZEROP (LOGAND CHAR 200Q])
(PUTPROPS PREFIXCHARCODE MACRO [(CHAR)
(CONSTANT (IPLUS PREFIXCODE (CHARCODE CHAR])
(PUTPROPS REALBITS MACRO ((X)
(LOGAND X 177Q)))
(PUTPROPS SPACEP MACRO [(CHAR)
(FMEMB (REALBITS CHAR)
(QUOTE (40Q 11Q 15Q])
(PUTPROPS TTBOUT MACRO [X (CONS (QUOTE PROGN)
(for ARG in X collect (LIST (QUOTE BLTCHAR)
(OR (FIXP ARG)
(CDR (ASSOC ARG DMCHARCODES))
(AND (EQ (NCHARS ARG)
1)
(CHCON1 ARG))
(LIST (QUOTE REALBITS)
ARG))
(QUOTE \DSP])
(PUTPROPS TTBOUTN MACRO ((X . Y)
(FRPTQ X (TTBOUT . Y))))
(PUTPROPS WORDSEPRP DMACRO [(X)
(OR (EQ (\SYNCODE \PRIMTERMSA (REALBITS X))
WORDSEPR.TC)
(PROGN (* Temporary)
(SELCHARQ (REALBITS X)
((TAB CR %( %) %[ %])
T)
NIL])
(PUTPROPS FCHARWIDTH MACRO ((CHAR FONT)
(\FGETWIDTH [ffetch (ARRAYP BASE) of (ffetch \SFWidths
of (\DTEST FONT (QUOTE
FONTDESCRIPTOR]
(LOGAND CHAR \CHARMASK))))
)
[DECLARE: EVAL@COMPILE
(RECORD LINE (START END FIRSTCOL LASTCOL ROW . NEXTLINE))
(RECORD TTYINBUFFER (FIRSTLINE OLDTAIL LASTSKIP LASTSKIPCHAR STORAGECOUNTER TTYINWINDOW .
TTYINWINDOWSTATE)
STORAGECOUNTER ← 0)
(RECORD TTYINWINDOWSTATE (TTOLDBUTTONFN TTOLDRIGHTFN TTOLDENTRYFN))
(RECORD MOUSEPOS (ROWPOS . COLPOS))
]
(RPAQQ TTCLOCK NIL)
(RPAQQ CHANGESARRAY NIL)
(RPAQQ DMCHARCODES ((HOME . 2)
(BELL . 7)
(DELCH . 10Q)
(BS . 10Q)
(DOWN . 12Q)
(INSERT.LINE . 12Q)
(LF . 12Q)
(ADDR . 14Q)
(CR . 15Q)
(BLINKON . 16Q)
(INSERT/DELETE . 20Q)
(DLE . 20Q)
(ERASE.TO.END . 27Q)
(CANCEL . 30Q)
(UP . 32Q)
(DELETE.LINE . 32Q)
(ESC . 33Q)
(FORWARD . 34Q)
(ROLL . 35Q)
(ERASE . 36Q)
(CLEAR . 36Q)
(US . 37Q)
(SPACE . 40Q)))
(RPAQQ TTSUPPORTFNS (ADD1POS INPART INSERTING TTBOUT TTBOUTN PR! PRALL PRBUF PRLINE))
(ADDTOVAR DONTCOMPILEFNS &DISPLAYCOMMENT DELETETO1 DELNCHARS DO.BACK DO.DOWN DO.FORWARD ADDSILENTCHAR
INSERTSPACES)
(DECLARE: EVAL@COMPILE
(RPAQQ DISPLAYTERMFLG T)
(RPAQQ DIDESCAPECODE 433Q)
(RPAQQ PREFIXCODE 200Q)
(RPAQQ PADCODE 400Q)
(RPAQQ PSEUDOCRCODE 1040Q)
(RPAQQ CHECKNIL? NIL)
(RPAQQ BREAKCODES (50Q 51Q 54Q 133Q 135Q 42Q))
(RPAQQ SEPRCODES (40Q 11Q 15Q 37Q))
(RPAQQ TTYINMAILFLG NIL)
(RPAQQ \CTRLKEY 40Q)
(RPAQQ \SHIFTKEYS 110Q)
(RPAQQ DOTSHADE 31714Q)
(CONSTANTS (DISPLAYTERMFLG T)
(DIDESCAPECODE 433Q)
(PREFIXCODE 200Q)
(PADCODE 400Q)
(PSEUDOCRCODE 1040Q)
(CHECKNIL?)
BREAKCODES SEPRCODES (TTYINMAILFLG)
\CTRLKEY \SHIFTKEYS DOTSHADE)
)
(RPAQQ TTNILFNS (BINARY.MODE RESTOREMOD CANCEL.MODES TENEXCOMPLETE GUESTUSER?))
(FOR FN IN TTNILFNS DO (MOVD (QUOTE NILL)
FN))
(DECLARE: EVAL@COMPILE
(PUTPROPS BINARY.MODE MACRO (NIL NIL))
(PUTPROPS RESTOREMOD MACRO (NIL NIL))
(PUTPROPS CANCEL.MODES MACRO (NIL NIL))
(PUTPROPS TENEXCOMPLETE MACRO (X NIL))
(PUTPROPS GUESTUSER? MACRO (NIL NIL))
)
(DECLARE: DONTEVAL@COMPILE
(SETTEMPLATE (QUOTE AT.END.OF.BUF)
(QUOTE MACRO))
(SETTEMPLATE (QUOTE AT.END.OF.LINE)
(QUOTE MACRO))
(SETTEMPLATE (QUOTE AT.START.OF.BUF)
(QUOTE MACRO))
(SETTEMPLATE (QUOTE AT.START.OF.LINE)
(QUOTE MACRO))
(SETTEMPLATE (QUOTE EMPTY.BUFFER)
(QUOTE MACRO))
(SETTEMPLATE (QUOTE EMPTY.LINE)
(QUOTE MACRO))
(SETTEMPLATE (QUOTE INSERTING)
(QUOTE MACRO))
(SETTEMPLATE (QUOTE ON.FIRST.LINE)
(QUOTE MACRO))
(SETTEMPLATE (QUOTE ON.LAST.LINE)
(QUOTE MACRO))
(SETTEMPLATE (QUOTE PADCHAR)
(QUOTE MACRO))
(SETTEMPLATE (QUOTE PADCHARCODE)
(QUOTE MACRO))
(SETTEMPLATE (QUOTE PREFIXCHAR)
(QUOTE MACRO))
(SETTEMPLATE (QUOTE PREFIXCHARCODE)
(QUOTE MACRO))
(SETTEMPLATE (QUOTE REALBITS)
(QUOTE MACRO))
(SETTEMPLATE (QUOTE SPACEP)
(QUOTE MACRO))
[SETTEMPLATE (QUOTE TTBOUT)
(QUOTE (CALL CALL .. (IF [OR (LISTP EXPR)
(AND (NTHCHAR EXPR 2)
(NOT (ASSOC EXPR DMCHARCODES]
EVAL NIL]
[SETTEMPLATE (QUOTE TTBOUTN)
(QUOTE (MACRO (X . Y)
(FRPTQ X (TTBOUT . Y]
(SETTEMPLATE (QUOTE MOUSESTATE)
(QUOTE (CALL CALL)))
(SETTEMPLATE (QUOTE LASTMOUSESTATE)
(QUOTE (CALL CALL)))
(SETTEMPLATE (QUOTE CAPABILITY?)
(QUOTE (CALL CALL)))
(RADIX 10Q)
DONTEVAL@LOAD EVAL@COMPILE
(RPAQ DONTCOMPILEFNS (UNION (UNION TTYINMACROS TTSUPPORTFNS)
DONTCOMPILEFNS))
)
)
(RPAQ? TTYINBUFFER )
(RPAQ? ?ACTIVATEFLG T)
(RPAQ? EDITPREFIXCHAR )
(RPAQ? EMACSFLG T)
(RPAQ? SHOWPARENFLG T)
(RPAQ? TTYINBSFLG T)
(RPAQ? TTYINCOMPLETEFLG T)
(RPAQ? TTYINUSERFN )
(RPAQ? TYPEAHEADFLG T)
(RPAQ? null "")
(RPAQ? DEFAULTPROMPT "** ")
(RPAQ? TTYJUSTLENGTH -10Q)
(RPAQ? \INSIDE.TTYIN )
(RPAQ? TTYINERRORSETFLG )
(RPAQ? TTYINRAISEFLG T)
(RPAQ? \TTYIN.RESTOREBUFCODE 302Q)
(RPAQ? \TTYIN.METASTATE )
(RPAQ? TTYINAUTOFILLMARGIN 10Q)
(RPAQ? TTYINFIXLIMIT 62Q)
(RPAQ? TTYINDEBUGFLG )
(RPAQ? HISTSTR1 "from file:")
(RPAQ? TTYINCOMMENTCHAR )
(MOVD? (QUOTE NILL)
(QUOTE GUESTUSER?))
(MOVD? (QUOTE FIXSPELL)
(QUOTE FIXSPELL!!))
(MOVD? (QUOTE HELPSYS)
(QUOTE XHELPSYS))
(PUTDQ? SPRINTT [LAMBDA (X)
(PRIN1 X])
(MOVD? (QUOTE NILL)
(QUOTE WINDOWWORLD))
(MOVD? (QUOTE LISPXFIX)
(QUOTE NONTTYINLISPXFIX))
(ADDTOVAR TTYINREADMACROS )
(ADDTOVAR TTYINRESPONSES )
(ADDTOVAR LISPXCOMS (STOP . OK))
(PUTPROPS TTYINREADMACROS VARTYPE ALIST)
(DECLARE: DONTEVAL@LOAD DOCOPY
[COND ((CCODEP (QUOTE TTYIN))
(CHANGENAME (QUOTE PROMPTCHAR)
(QUOTE LISPXREADP)
(QUOTE TTYINREADP))
(SETREADFN)
(MOVD (QUOTE TTYINFIX)
(QUOTE LISPXFIX]
(\SET.TTYINBOLDFONT (DEFAULTFONT (QUOTE DISPLAY)))
)
(DECLARE: DONTCOPY
(DECLARE: EVAL@COMPILE
[PUTDEF (QUOTE \TTWAITBOX)
(QUOTE RESOURCES)
(QUOTE (NEW (CREATECELL \FIXP]
)
)
(/SETTOPVAL (QUOTE \\TTWAITBOX.GLOBALRESOURCE))
(DECLARE: DONTEVAL@LOAD DOEVAL@COMPILE DONTCOPY COMPILERVARS
(ADDTOVAR NLAMA TTBOUTN TTBOUT)
(ADDTOVAR NLAML TTED CHARMACRO? CAPABILITY?)
(ADDTOVAR LAMA )
)
(PUTPROPS TTYIN COPYRIGHT ("Xerox Corporation" 3676Q 3677Q 3700Q))
(DECLARE: DONTCOPY
(FILEMAP (NIL (11620Q 521711Q (TTYIN 11632Q . 31242Q) (TTYIN.SETUP 31244Q . 35777Q) (TTYIN.CLEANUP
36001Q . 37162Q) (TTYIN1 37164Q . 76673Q) (TTYIN1RESTART 76675Q . 100460Q) (TTYIN.FINISH 100462Q .
120654Q) (TTYIN.READ 120656Q . 125376Q) (TTYIN.BALANCE 125400Q . 126105Q) (ADDCHAR 126107Q . 132203Q)
(ADDCHARS.INSERTING 132205Q . 133706Q) (ADDNAKEDCHAR 133710Q . 136400Q) (ADDSILENTCHAR 136402Q .
140632Q) (ADDTAB 140634Q . 142503Q) (ADJUSTLINE 142505Q . 165570Q) (ADJUSTLINE.AND.RESTORE 165572Q .
166403Q) (AT.END.OF.SCREEN 166405Q . 166766Q) (AT.END.OF.TEXT 166770Q . 167626Q) (AUTOCR? 167630Q .
170563Q) (BACKSKREAD 170565Q . 175617Q) (BACKWARD.DELETE.TO 175621Q . 176076Q) (BREAKLINE 176100Q .
201413Q) (BUFCHARCOUNT 201415Q . 202463Q) (BUFTAILP 202465Q . 203050Q) (CHECK.MARGIN 203052Q . 204055Q
) (CLEAR.LINE? 204057Q . 204565Q) (CREATE.LINE 204567Q . 205323Q) (CURRENT.WORD 205325Q . 210311Q) (
DELETE.TO.END 210313Q . 211507Q) (DELETELINE 211511Q . 216112Q) (DELETETO 216114Q . 220737Q) (
DELETETO1 220741Q . 222454Q) (DO.EDIT.COMMAND 222456Q . 256201Q) (DO.EDIT.PP 256203Q . 260266Q) (
DO?CMD 260270Q . 266043Q) (TTYIN.PRINTARGS 266045Q . 271673Q) (TTYIN.READ?=ARGS 271675Q . 272776Q) (
DOTABS 273000Q . 274641Q) (EDITCOLUMN 274643Q . 275475Q) (EDITNUMBERP 275477Q . 276021Q) (
END.DELETE.MODE 276023Q . 276547Q) (ENDREAD? 276551Q . 301700Q) (FIND.LINE 301702Q . 303201Q) (
FIND.LINE.BREAK 303203Q . 304136Q) (FIND.MATCHING.QUOTE 304140Q . 305053Q) (FIND.MATCHING.WORD 305055Q
. 306024Q) (FIND.NEXT.WORD 306026Q . 310075Q) (FIND.NON.SPACE 310077Q . 310467Q) (FIND.START.OF.WORD
310471Q . 311221Q) (FORWARD.DELETE.TO 311223Q . 314065Q) (GO.TO.ADDRESSING 314067Q . 315774Q) (
GO.TO.FREELINE 315776Q . 316756Q) (GO.TO.RELATIVE 316760Q . 324515Q) (INIT.CURSOR 324517Q . 326256Q) (
INSERT.CHAR.IN.BUF 326260Q . 327062Q) (INSERT.NODE 327064Q . 327736Q) (INSERTLINE 327740Q . 332000Q) (
KILL.LINES 332002Q . 332713Q) (KILLSEGMENT 332715Q . 334414Q) (L-CASECODE 334416Q . 335016Q) (
MOVE.BACK.TO 335020Q . 335364Q) (MOVE.FORWARD.TO 335366Q . 336013Q) (MOVE.TO.LINE 336015Q . 337335Q) (
MOVE.TO.NEXT.LINE 337337Q . 337741Q) (MOVE.TO.START.OF.WORD 337743Q . 341271Q) (MOVE.TO.WHEREVER
341273Q . 341621Q) (NTH.COLUMN.OF 341623Q . 342306Q) (NTH.RELATIVE.COLUMN.OF 342310Q . 344747Q) (
OVERFLOW? 344751Q . 346514Q) (OVERFLOWLINE? 346516Q . 347154Q) (PREVLINE 347156Q . 351111Q) (PREVWORD
351113Q . 353037Q) (PROPERTAILP 353041Q . 353347Q) (READFROMBUF 353351Q . 357500Q) (RENUMBER.LINES
357502Q . 360207Q) (RESTORE.CURSOR 360211Q . 360515Q) (RESTOREBUF 360517Q . 363352Q) (RETYPE.BUFFER
363354Q . 367305Q) (SAVE.CURSOR 367307Q . 367552Q) (SCANBACK 367554Q . 371543Q) (SCANFORWARD 371545Q
. 372653Q) (SCRATCHCONS 372655Q . 373557Q) (SEGMENT.LENGTH 373561Q . 374400Q) (SEGMENT.BIT.LENGTH
374402Q . 375713Q) (SETLASTC 375715Q . 376452Q) (SETTAIL? 376454Q . 377742Q) (SHOW.MATCHING.PAREN
377744Q . 403677Q) (SKIP/ZAP 403701Q . 407253Q) (START.NEW.LINE 407255Q . 407755Q) (
START.OF.PARAGRAPH? 407757Q . 410346Q) (TTADJUSTWORD 410350Q . 412407Q) (TTBIN 412411Q . 414316Q) (
TTBITWIDTH 414320Q . 414611Q) (TTCOMPLETEWORD 414613Q . 427377Q) (TTCRLF 427401Q . 427720Q) (
TTCRLF.ACCOUNT 427722Q . 431120Q) (TTDELETECHAR 431122Q . 433226Q) (TTDELETELINE 433230Q . 436032Q) (
TTDELETEWORD 436034Q . 436627Q) (TTECHO.TO.FILE 436631Q . 441673Q) (TTGIVEHELP 441675Q . 444027Q) (
TTGIVEHELP1 444031Q . 444700Q) (TTGIVEHELP2 444702Q . 445705Q) (TTLASTLINE 445707Q . 446417Q) (
TTLOADBUF 446421Q . 453320Q) (TTNEXTCHAR 453322Q . 455164Q) (TTNEXTLINE 455166Q . 455621Q) (TTNEXTNODE
455623Q . 456201Q) (TTNLEFT 456203Q . 460331Q) (TTNTH 460333Q . 461137Q) (TTNTHLINE 461141Q . 461641Q
) (TTPRIN1 461643Q . 462664Q) (TTPRIN2 462666Q . 464507Q) (TTPROMPTCHAR 464511Q . 465167Q) (TTRATOM
465171Q . 470401Q) (TTREAD 470403Q . 473302Q) (TTREADLIST 473304Q . 477271Q) (TTRUBOUT 477273Q .
477774Q) (TTSKIPSEPR 477776Q . 500520Q) (TTSKREAD 500522Q . 503063Q) (TTUNREADBUF 503065Q . 503726Q) (
TTWAITFORINPUT 503730Q . 512566Q) (TTYINSTRING 512570Q . 514067Q) (TYPE.BUFFER 514071Q . 515077Q) (
U-CASECODE 515101Q . 515503Q) (U/L-CASE 515505Q . 520700Q) (WORD.MATCHES.BUFFER 520702Q . 521707Q)) (
522432Q 547342Q (&DISPLAYCOMMENT 522444Q . 525303Q) (CAPABILITY? 525305Q . 527746Q) (BEEP 527750Q .
530224Q) (BITBLT.DELETE 530226Q . 531453Q) (BITBLT.ERASE 531455Q . 532005Q) (BITBLT.INSERT 532007Q .
532502Q) (DO.CRLF 532504Q . 533073Q) (DO.DELETE.LINES 533075Q . 534601Q) (DO.DOWN 534603Q . 535234Q) (
DO.INSERT.LINE 535236Q . 540254Q) (DO.LF 540256Q . 540503Q) (DO.UP 540505Q . 540747Q) (ERASE.SCREEN
540751Q . 541153Q) (ERASE.TO.END.OF.LINE 541155Q . 541615Q) (ERASE.TO.END.OF.PAGE 541617Q . 542464Q) (
INSERT.TEXT 542466Q . 543452Q) (INSERTNCHARS 543454Q . 544070Q) (TTDELSECTION 544072Q . 544524Q) (
TTADJUSTWIDTH 544526Q . 546140Q) (TTINSERTSECTION 546142Q . 546645Q) (TTSETCURSOR 546647Q . 547340Q))
(547376Q 607515Q (DO.MOUSE 547410Q . 552371Q) (DO.SHIFTED.SELECTION 552373Q . 566451Q) (COPY.SEGMENT
566453Q . 566762Q) (DELETE.LONG.SEGMENT 566764Q . 567422Q) (DELETE.LONG.SEGMENT1 567424Q . 572673Q) (
INVERT.LONG.SEGMENT 572675Q . 574157Q) (INVERT.SEGMENT 574161Q . 576434Q) (BRACKET.CURRENT.WORD
576436Q . 600666Q) (TTBEFOREPOS 600670Q . 601671Q) (TTNEXTPOS 601673Q . 602731Q) (TTRACKMOUSE 602733Q
. 607513Q)) (607756Q 620215Q (ADD1POS 607770Q . 610217Q) (INPART 610221Q . 610716Q) (INSERTING
610720Q . 611310Q) (TTBOUT 611312Q . 612545Q) (TTBOUTN 612547Q . 613024Q) (PR! 613026Q . 613741Q) (
PRALL 613743Q . 614345Q) (PRBUF 614347Q . 616050Q) (PRLINE 616052Q . 620213Q)) (620426Q 631511Q (
SETREADFN 620440Q . 621146Q) (TTYINENTRYFN 621150Q . 621765Q) (TTYINREADP 621767Q . 622567Q) (
TTYINREAD 622571Q . 624274Q) (TTYINFIX 624276Q . 625555Q) (CHARMACRO? 625557Q . 626507Q) (TTYINMETA
626511Q . 630136Q) (\SET.TTYINBOLDFONT 630140Q . 631005Q) (TTYIN.LASTINPUT 631007Q . 631507Q)) (
631512Q 652040Q (TTED 631524Q . 637771Q) (DO.EE 637773Q . 640176Q) (TTYINEDIT 640200Q . 641604Q) (
SIMPLETEXTEDIT 641606Q . 643764Q) (SET.TTYINEDIT.WINDOW 643766Q . 645766Q) (TTYIN.PPTOFILE 645770Q .
650473Q) (TTYIN.SCRATCHFILE 650475Q . 652036Q)))))
STOP