//Mcmdov.bcpl
//	Last edited: 25 October 1979

get "mdecl.d"
get "streams.d"
get "altofilesys.d"

//This file interfaces the command menu to the various procedures which
//carry out actions

external [
// OS
	DoubleAdd; Timer; TruncateDiskStream
	Resets; Puts; Closes; FileLength; PositionPage

// MASM
	@WssCSS; DoubleNeg; ErrorProtect; Wss

// MIOC
	SimpleTexttoDVec

// MTXTBUF
	TxtBNewChar; ClearInText; InputTextBuffer

// MSYM
	TVtoString; StreamFromTextName

// MDISP
	SetDisplay

// MRGN
	AddToEveryTimeList; ErrorFlag; ScreenTV; ControlV

// MMENU
	DoTextAction; CommandCount; SkipName; SkipCommandCount; CFileStream
	AbortingCFile

// MCMD
	TimeOutEveryTime; TEveryTime; FormCmdMenu; ShowActionForm
	DisplayError; ErrorAbort; EndError; CFOutStream
	Confirmed; ConfirmAct

// xxACTIONS
	TimeTimeOut

// Machine dependent
	@ScreenHeight

// Defined here
	TextCmdOutStream

// Defined here for init only
	CmdConfirm; CmdReturn; CmdAbortCFile; CmdSkipCmd
	CmdTimeOut; CmdShowError; CmdStartWC; CmdStopWC; CmdShowCmds
	CmdOpenOutput; CmdCloseOutput; CmdWriteMessage; CmdDumpDisplay
]

static	[
	TextCmdOutStream = 0
]

let CmdShowCmds(Pred,nil,nil) be
[	ShowActionForm = Pred; FormCmdMenu()
]
	

and CmdStartWC(nil,nil,nil) be
[	if InputTextBuffer!0 eq 0 then ErrorAbort("Type file name first")
	if not ConfirmAct("Write commands on ",InputTextBuffer)
		then return
	TextCmdOutStream = StreamFromTextName(InputTextBuffer,".MIDAS",
		ksTypeWriteOnly,charItem)
	ClearInText(); FormCmdMenu()
]


and CmdStopWC(nil,nil,nil) be
[	if TextCmdOutStream ne 0 do
	[ TruncateDiskStream(TextCmdOutStream); Closes(TextCmdOutStream)
	  WssCSS("Closed output file"); TextCmdOutStream = 0; FormCmdMenu()
	]
]


and CmdConfirm(nil,nil,nil) be Confirmed = true


and CmdTimeOut(nil,nil,nil) be
[	SetDisplay(false)	//Turn on display (to execute EveryTime stuff)
	Timer(TimeTimeOut)
	let TimeOut = vec 1
	unless SimpleTexttoDVec(InputTextBuffer,32,TimeOut) do
		ErrorAbort("Bad arg for TimeOut")
	CommandCount = 2
	DoubleAdd(TimeTimeOut,TimeOut); DoubleNeg(TimeTimeOut)
	if TEveryTime eq 0 then
		TEveryTime = AddToEveryTimeList(TimeOutEveryTime)
]


//"L X Skip 3" or "L X Skip .FOO" are legal
and CmdSkipCmd(Backward,MBunion,nil) be
[	let SC = vec 0
	if Backward then Resets(CFileStream)
	if InputTextBuffer!1 eq $. then
	[ let len = InputTextBuffer!0
	  if (len ge 2) & (len le 20) do
	  [ for I = 2 to len do SkipName>>CV^(I-1) = InputTextBuffer!I
	    SkipName>>lh = len -1; return
	  ]
	]
	unless SimpleTexttoDVec(InputTextBuffer,16,SC) do
		ErrorAbort("Bad arg for Skip")
	SkipCommandCount = SC!0
]


and CmdReturn(nil,nil,nil) be
[	let SC = vec 0
	unless SimpleTexttoDVec(InputTextBuffer,16,SC) do
		ErrorAbort("Bad arg for Return")
	AbortingCFile = SC!0+1
]


//This action can be initated by control-Z as well as by the
//"Abort-CFile" menu item put up by DisplayError.
//If executing a cfile, then set flag to abort it.
//Then execute, if doing DisplayError the "Abort" action, else
//the control-C action.
and CmdAbortCFile(C,nil,nil) be
[	if CFileStream ne 0 then AbortingCFile = C
	if ErrorFlag then EndError(false,nil,nil)
	DoTextAction($C-100B)
]


and CmdShowError(nil,nil,nil) be
[	AbortingCFile = -1
	let S = TVtoString(InputTextBuffer); TxtBNewChar(177B)
	DisplayError(S,"Continue")
	AbortingCFile = 0
]


and CmdOpenOutput(appendF,nil,nil) be
[	if CFOutStream ne 0 then Closes(CFOutStream)
	let ksType,verArg = nil,nil
	test appendF
	ifso
	[ ksType,verArg = ksTypeReadWrite,verLatestCreate
	]
	ifnot
	[ ksType,verArg = ksTypeWriteOnly,verNew
	]
	CFOutStream = StreamFromTextName(InputTextBuffer,
		".REPORT",ksType,charItem,verArg)
	if appendF then FileLength(CFOutStream)
]


and CmdCloseOutput(nil,nil,nil) be
[	if CFOutStream ne 0 then
	[ Closes(CFOutStream); CFOutStream = 0
	]
]


//Substitute <cr> for ~ and <space> for \
and CmdWriteMessage(nil,nil,nil) be
[	if CFOutStream eq 0 then ErrorAbort("No output file for WriteMessage")
	for I = 1 to InputTextBuffer!0 do Puts(CFOutStream,
		(InputTextBuffer!I eq $~ ? $*N,
		(InputTextBuffer!I eq $\ ? $ ,InputTextBuffer!I)))
]


and CmdDumpDisplay(nil,nil,nil) be
[	if CFOutStream eq 0 then ErrorAbort("No output file for DumpDisplay")
	Puts(CFOutStream,$*N)
	for I = 1 to ScreenHeight do
	[ if ControlV!I ne 0 do Wss(CFOutStream,ScreenTV!I)
	  Puts(CFOutStream,$*N)
	]
	Puts(CFOutStream,$*N)
]