errwin.icl 19.7 KB
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implementation module errwin

import StdBool, StdFunc, StdMisc, StdChar, StdArray
import StdPSt, StdWindow, StdControlClass, StdControlReceiver, StdMenuElement
import StdClipboard, colourclip, StdPathname
import FilteredListBox

import morecontrols, colorpickcontrol, ioutil

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from	IDE			import OpenModule
from	IdeState	import :: General, getErrInfo, setErrInfo, :: ErrorInfo, :: MenuIds, getMenuIds, :: ErrPrefs
from	IdeState	import :: SearchMenuIds, :: PLMMessage, :: PLMReply, :: MIn, :: EditMenuLS, getInteract, writeLog
from	EdClient	import lineSelection
import EdClient
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import UtilObjectIO
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/*
ADD:
- error type selection...
- sort by error type...
- find...
- copy...

Means we should really build a custom window for this...
*/

sr_find_err :: !Bool !*(PSt *General) -> *PSt *General
sr_find_err forward ps
	# (errinfo,ps)	= getErrInfo ps
	= exec_next_filtered forward errinfo.infoId fifi ps
where
	fifi errmsg ps
		| not_empty = OpenModule path (lineSelection (inc lnr)) ps
		= ps
	where
		(path,lnr)	= ParseErrorMsg errmsg
		not_empty	= path <> EmptyPathname

//--- Error window handling

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countnums [message:messages] (e,w,i)
	| IsErrorMsg message
		= countnums (dropWhile first_char_is_space messages) (inc e,w,i)
	| IsWarningMsg message
		= countnums messages (e,inc w,i)
		= countnums messages (e,w,inc i)
countnums [] nums
	= nums
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checkWindowExistence id io
	# (st,io)	= getWindowsStack io
	= (isMember id st,io)

updateErrorWindow :: !([String]) !*(PSt *General) -> *PSt *General;
updateErrorWindow messages ps
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	# (interact, ps) = getInteract ps
	| not interact
		=	seq (map writeLog messages) ps
	// interact
		=	updateErrorWindowInteractive messages ps

updateErrorWindowInteractive :: !([String]) !*(PSt *General) -> *PSt *General;
updateErrorWindowInteractive [] ps = ps	// or should we always show it?
updateErrorWindowInteractive messages ps
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	#! (errinfo,ps)	= getErrInfo ps
	#! (isOpen,ps)	= accPIO (checkWindowExistence errinfo.errorId) ps
	#! ps			= case isOpen of
						True	-> ps
						_		-> err_open errinfo ps
	#! ps			= appendFilteredListBoxItems errinfo.infoId messages ps
	#! (numerr,numwrn,numinf)
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					= countnums messages (errinfo.err_count,errinfo.wrn_count,errinfo.inf_count)
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	# err			= (errinfo.err_countId,toString numerr)
	# wrn			= (errinfo.wrn_countId,toString numwrn)
	# inf			= (errinfo.inf_countId,toString numinf)
	#! cts			= case (numerr==errinfo.err_count,numwrn==errinfo.wrn_count,numinf==errinfo.inf_count) of
						(False,False,False)	-> [err,wrn,inf]
						(False,False,True)	-> [err,wrn]
						(False,True,False)	-> [err,inf]
						(False,True,True)	-> [err]
						(True,False,False)	-> [wrn,inf]
						(True,False,True)	-> [wrn]
						(True,True,False)	-> [inf]
						(True,True,True)	-> []
	#! ps			= appPIO (setControlTexts cts) ps
	#! errinfo		= {errinfo & err_count = numerr, wrn_count = numwrn, inf_count = numinf}
	#! ps			= setErrInfo errinfo ps
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	= ps
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err_open :: !(ErrorInfo (PSt *General)) !*(PSt *General) -> *PSt *General
err_open errinfo ps
	#! (menuIds=:{searchIds},ps)	= getMenuIds ps
	#! (inf_size,ps)				= controlSize (infobar errinfo) True Nothing Nothing Nothing ps
	# (elb)							= FilteredListBoxControl [] [] errinfo.infoId
					[ ControlOuterSize errinfo.err_size
					, ControlResize (err_resize inf_size.Size.h)
					, ControlPen
						[ PenColour errinfo.err_forg
						, PenBack errinfo.err_back
						, PenFont errinfo.err_font
						]
					, ControlPos (Fix,OffsetVector {zero & vy = inf_size.Size.h})
					, (flbMouse fifi)
					, (flbKeyboard fifi)
					]
	#! (win_size,ps)				= controlSize elb True Nothing Nothing Nothing ps
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	# (dback,ps) = GetDialogBackgroundColour ps
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	#! wdef							= Window "Errors & Warnings"
					( infobar errinfo :+: elb
					)
					[ WindowId errinfo.errorId
					, WindowClose (noLS(err_close` o ew_deactivate))
					, WindowPos (LeftTop,OffsetVector errinfo.err_offset)
					, WindowViewSize win_size
					, WindowInitActive errinfo.infoId.fcontrolId
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					, WindowPen [PenBack dback]
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					, WindowActivate (noLS (ew_activate errinfo.infoId.fcontrolId))
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					, WindowDeactivate (noLS ew_deactivate)
					]
	#! ldef							= (errinfo.err,errinfo.wrn,errinfo.inf)
	#! (err,ps)						= openWindow ldef wdef ps
	| err == NoError
		# ps = appPIO (enableMenuElements [searchIds.nextIds!!1]) ps
		= setFilter errinfo.infoId (makeFilter errinfo.err errinfo.wrn errinfo.inf) ps
	= ps
where
	fifi errmsg ps
		| not_empty = OpenModule path (lineSelection (inc lnr)) ps
		= ps
	where
		(path,lnr)	= ParseErrorMsg errmsg
		not_empty	= path <> EmptyPathname

	infobar {err,err_buttonId,err_count,err_countId,wrn,wrn_buttonId,wrn_count,wrn_countId,inf,inf_buttonId,inf_count,inf_countId}
		= LayoutControl
			(	errButton err err_buttonId
			:+: errCount err_count err_countId
			:+: wrnButton wrn wrn_buttonId
			:+: wrnCount wrn_count wrn_countId
			:+: infButton inf inf_buttonId
			:+: infCount inf_count inf_countId
			)
			[ ControlResize inf_resize
			, ControlPos (Fix,zero)
			]
	wrnButton button buttonId
		= CheckControl [("Warnings:",Nothing,toMark button,wrnFun)] (Rows 1)
			[ControlId buttonId
			]
	wrnCount count countId
//		= EditControl (toString count) (ContentWidth "8888") 1
//			[ ControlSelectState Unable
		= TextControl (toString count)
			[ ControlWidth (ContentWidth "8888")
			, ControlId countId
			]
	errButton button buttonId
		= CheckControl [("Errors:",Nothing,toMark button,errFun)] (Rows 1)
			[ControlId buttonId
			]
	errCount count countId
//		= EditControl (toString count) (ContentWidth "8888") 1
//			[ ControlSelectState Unable
		= TextControl (toString count)
			[ ControlWidth (ContentWidth "8888")
			, ControlId countId
			]
	infButton button buttonId
		= CheckControl [("Info:",Nothing,toMark button,infFun)] (Rows 1)
			[ControlId buttonId
			]
	infCount count countId
//		= EditControl (toString count) (ContentWidth "8888") 1
//			[ ControlSelectState Unable
		= TextControl (toString count)
			[ ControlWidth (ContentWidth "8888")
			, ControlId countId
			]
	wrnFun ((err,wrn,inf),ps)
		# wrn = not wrn
		# (ei,ps) = getErrInfo ps
		# ps = setErrInfo {ei & wrn = wrn} ps
		# ps = setFilter ei.infoId (makeFilter err wrn inf) ps
		= ((err,wrn,inf),ps)
	errFun ((err,wrn,inf),ps)
		# err = not err
		# (ei,ps) = getErrInfo ps
		# ps = setErrInfo {ei & err = err} ps
		# ps = setFilter ei.infoId (makeFilter err wrn inf) ps
		= ((err,wrn,inf),ps)
	infFun ((err,wrn,inf),ps)
		# inf = not inf
		# (ei,ps) = getErrInfo ps
		# ps = setErrInfo {ei & inf = inf} ps
		# ps = setFilter ei.infoId (makeFilter err wrn inf) ps
		= ((err,wrn,inf),ps)
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	makeFilter err wrn inf [str:strings]
		| IsErrorMsg str
			| err
				# (error_strings,strings) = span first_char_is_space strings
				= [str:error_strings++makeFilter err wrn inf strings]
				= makeFilter err wrn inf (dropWhile first_char_is_space strings)
		| IsWarningMsg str
			| wrn
				= [str:makeFilter err wrn inf strings]
				= makeFilter err wrn inf strings
			| inf
				= [str:makeFilter err wrn inf strings]
				= makeFilter err wrn inf strings
	makeFilter err wrn inf []
		= []

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	err_resize ih oc ow nw
		= {w = nw.w, h = nw.Size.h - ih}
	inf_resize oc ow nw
		= {oc & w = nw.w}

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first_char_is_space s = size s>0 && s.[0]==' '

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ew_activate cId ps
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	# ({mn_cut,mn_cpy,mn_pst,mn_clr,mg_edt,searchIds},ps=:{io})
			= getMenuIds ps
	// disable Edit menu stuff
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	# io = disableMenuElements [mn_cut/*,mn_cpy*/,mn_pst,mn_clr:mg_edt] io
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	// disable Search menu stuff
	# io = disableMenuElements searchIds.findIds io
	# io = disableMenuElements searchIds.gotoIds io
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	# ps = {ps & io = io}
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//	# ps = setActiveControl cId ps
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	= ps
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ew_deactivate ps
	# ({mn_cut,mn_cpy,mn_pst,mn_clr,mg_edt,searchIds},ps=:{io})
			= getMenuIds ps
	// enable Edit menu stuff
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	# io = enableMenuElements [mn_cut/*,mn_cpy*/,mn_pst,mn_clr:mg_edt] io
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	// enable Search menu stuff
	# io = enableMenuElements searchIds.findIds io
	# io = enableMenuElements searchIds.gotoIds io
	= {ps & io = io}

err_close` ps
	# (errinf,ps)		= getErrInfo ps
	= err_close errinf ps

err_close :: !(ErrorInfo (PSt *General)) !*(PSt *General) -> *PSt *General
err_close errinf ps
	# (errinf,ps)		= err_close_info errinf ps
	# ({searchIds},ps)	= getMenuIds ps
	# ps				= appPIO (disableMenuElements [searchIds.nextIds!!1]) ps
	= setErrInfo errinf ps

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ew_is_active :: !*(PSt *General) -> (!Bool,!*PSt *General)
ew_is_active ps
	# (win,ps)		= accPIO getActiveWindow ps
	# (errInf,ps)	= getErrInfo ps
	| isNothing win
		= (False,ps)
	# win			= fromJust win
	| win == errInf.errorId
		= (True,ps)
	= (False,ps)

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ew_safe_close			:: !*(PSt *General) -> *PSt *General
ew_safe_close ps
	# (win,ps)		= accPIO getActiveWindow ps
	# (errInf,ps)	= getErrInfo ps
	| isNothing win
		= err_close errInf ps
	# win			= fromJust win
	| win == errInf.errorId
		# ps		= ew_deactivate ps
		= err_close errInf ps
	= err_close errInf ps

ew_maybe_close :: !Id !*(PSt *General) -> (Bool,*PSt *General)
ew_maybe_close win ps
	# (errInf,ps) = getErrInfo ps
	| win == errInf.errorId
		# ps				= ew_deactivate ps
		# ps = err_close errInf ps
		= (True,ps)
	= (False,ps)

err_close_info :: (ErrorInfo .a) *(PSt .b) -> ((ErrorInfo .a),*PSt .b)
err_close_info errinfo ps
	# (err_pos,ps)		= accPIO (getWindowPos errinfo.errorId) ps
	# (wdef,ps)			= accPIO (getWindow errinfo.errorId) ps
	# wdef				= fromJust wdef
	# (ok,err_siz)		= getControlOuterSize errinfo.infoId.fcontrolId wdef
	# errinfo			= if (isNothing err_pos || not ok) errinfo {errinfo & err_offset = fromJust err_pos, err_size = err_siz}
	# errinfo			= {errinfo & err_count = 0, wrn_count = 0, inf_count = 0}
	# ps				= closeWindow errinfo.errorId ps
	= (errinfo,ps)

// error window options

:: EWO =
	{ fn	:: !String		// font name
	, fs	:: !Int			// font size
	, fc	:: !Colour		// foreground colour
	, bc	:: !Colour		// background colour
	, cur	:: !EWO_LS
	}

:: EWO_LS = TXT | BCK

instance == EWO_LS
where
	(==) TXT TXT = True
	(==) BCK BCK = True
	(==) _ _ = False


err_options :: !*(PSt *General) -> *PSt *General;
err_options ps
    # (dialogId,ps)	= openId ps
    # (okId,ps)		= openId ps
    # (cancelId,ps)	= openId ps
	# (fcid,ps)		= openId  ps
	# (bcid,ps)		= openId  ps
	# (rgbid,ps)	= openRGBId ps
	# (fontNames, ps) = accPIO (accScreenPicture getFontNames) ps
	// no fixed width filtering for error-window...!
	# fontSizes		= [7,8,9,10,11,12]
	# (errinf,ps)	= getErrInfo ps
	# font			= errinf.err_font
	# fdef			= getFontDef font
	# inifn			= fdef.fName
	# inifs			= fdef.fSize
	# inifc			= errinf.err_forg
	# inibc			= errinf.err_back
	# (lsid,ps)		= openRId ps
	# inistate		= {fn = inifn, fs = inifs, fc = inifc, bc = inibc, cur = TXT}
    # controls		=
    	(LayoutControl 
		(	FontNameSizeControl inifn inifs fontNames fontSizes fontfun sizefun [ left ]
		:+:	RGBColourPickControl` rgbid inifc fcid (Just (Left, zero))
		) []

		:+: LayoutControl
		(	TextControl "Text:" [ left , ControlWidth (ContentWidth "Background: ")]
		:+: ColourBoxControl` (toRGBColour inifc) fcid (mfilter,mfun rgbid lsid fcid bcid TXT) Nothing
		:+: TextControl "Background:" [ left, ControlWidth (ContentWidth "Background: ")]
		:+: ColourBoxControl` (toRGBColour inibc) bcid (mfilter,mfun rgbid lsid fcid bcid BCK) Nothing
		) []
		
	   	:+:	ButtonControl "Ok"
  			[ ControlId okId
  			, ControlFunction (okFun rgbid lsid dialogId) 
  			, ControlPos (Right, zero)
  			, ControlWidth (ContentWidth "Cancel")
  			]
    	:+:	ButtonControl "Cancel"
  			[ ControlPos (LeftOfPrev, zero) 
  			, ControlFunction (cancelFun inistate dialogId)
  			, ControlId cancelId
  			] 
		:+: ButtonControl "Apply"
			[ ControlPos (LeftOfPrev,zero)
			, ControlFunction (applyFun rgbid lsid)
			]
  		:+: ButtonControl "Paste"
  			[ ControlPos (LeftOfPrev,zero)
  			, ControlFunction (pasteFun rgbid fcid bcid)
  			]
  		:+: ButtonControl "Copy"
  			[ ControlPos (LeftOfPrev,zero)
  			, ControlFunction (copyFun rgbid)
  			]

  		:+: Receiver lsid lsfun []
		)
	# dialog		=
		Dialog "Error Window..." controls 
  		[ WindowId		dialogId 
  		, WindowOk		okId
  		, WindowCancel	cancelId
  		, WindowClose	(cancelFun inistate dialogId)
		, WindowInit	(setBoxCol fcid bcid)
  		]
	# (_,ps) = openModalDialog inistate dialog ps
	= ps
where
	lsfun f (ls,ps)
		= f (ls,ps)
	okFun rgbid lsid dialogId (ls,ps)
		# ps = getColourBoxColour rgbid cont ps
		= (ls,ps)
	where
		cont col ps
			| isNothing col
				= ps
			# col = fromJust col
			# (_,ps) = asyncSend lsid (cont2 col) ps
			= ps
		cont2 col (ls=:{cur},ps)
			# ls	= case cur of
						TXT -> {ls & fc = col}
						BCK -> {ls & bc = col}
			# (ls,ps)= apply (ls,ps)
			= (ls,closeWindow dialogId ps)
	cancelFun inistate dialogId (ls,ps)
		# ls		= inistate
		# (ls,ps)	= apply (ls,ps)
		= (ls,closeWindow dialogId ps)
	applyFun rgbid lsid (ls,ps)
		# ps = getColourBoxColour rgbid cont ps
		= (ls,ps)
	where
		cont col ps
			| isNothing col
				= ps
			# col = fromJust col
			# (_,ps) = asyncSend lsid (cont2 col) ps
			= ps
		cont2 col (ls=:{cur},ps)
			# ls	= case cur of
						TXT -> {ls & fc = col}
						BCK -> {ls & bc = col}
			= apply (ls,ps)
	toStringC :: !Colour -> String
	toStringC c = toString c
	copyFun rgbid (ls,ps)
		# ps = getColourBoxColour rgbid cont ps
		= (ls,ps)
	where
		cont col ps
			| isNothing col
				= ps
			# col = fromJust col
			# ps	= setClipboard [toClipboard (toString col)] ps
			= ps
	pasteFun rgbId fcid bcid (ls=:{cur},ps)
		// get clipboard
		// and put in active colour control
		# (its,ps)	= getClipboard ps
		| isEmpty its
			= (ls,ps)
		# its		= map fromClipboard its
		# its		= filter isJust its
		| isEmpty its
			= (ls,ps)
		# it		= fromJust (hd its)
		| it <> toStringC (fromString it)
			= (ls,ps)
		# col		= fromString it
		# ls		= case cur of
						TXT -> {ls & fc = col}
						BCK -> {ls & bc = col}
		# (ls,ps)	= setBoxCol fcid bcid (ls,ps)
		# ps		= setColourBoxColour` rgbId col ps
		= (ls,ps)
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	setBoxCol fcid bcid (ls=:{cur,fc,bc},ps)
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		# (cId,col) = case cur of
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						TXT	-> (fcid,fc)
						BCK	-> (bcid,bc)
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		# ps = appPIO (SetColourBox` cId (toRGBColour col)) ps
		= (ls,ps)
	mfilter (MouseDown _ _ _) = True
	mfilter _ = False
	mfun rgbid lsid fcid bcid act _ (ls=:{cur,fc,bc},ps)
		| act == cur = (ls,ps)
		# ps = getColourBoxColour rgbid cont ps
		= (ls,ps)
	where
		cont col ps
			| isNothing col = ps
			# col = fromJust col
			# ps	= appPIO (case act of
								TXT	-> SetColourBox` fcid (case cur of
									TXT	-> toRGBColour col
									_	-> toRGBColour fc
									)
								_	-> SetColourBox fcid (case cur of
									TXT	-> toRGBColour col
									_	-> toRGBColour fc
									)
							) ps
			# ps	= appPIO (case act of
								BCK	-> SetColourBox` bcid (case cur of
									BCK	-> toRGBColour col
									_	-> toRGBColour bc
									)
								_	-> SetColourBox bcid (case cur of
									BCK	-> toRGBColour col
									_	-> toRGBColour bc
									)
							) ps
			# cId = case act of
						TXT -> fcid
						BCK -> bcid
			# col` = case act of
						TXT -> fc
						BCK -> bc
			# ps	= setColourBoxId rgbid cId ps
			# ps	= setColourBoxColour` rgbid col` ps
			# (_,ps) = asyncSend lsid (cont2 col) ps
			= ps
		cont2 col (ls=:{cur},ps)
			# ls	= case cur of
						TXT -> {ls & fc = col, cur = act}
						BCK -> {ls & bc = col, cur = act}
			= (ls,ps)
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	apply (ls=:{fc,bc,fn,fs},ps)
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		# (errinf,ps)	= getErrInfo ps
		# lbId			= errinf.infoId
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		# (fnt,ps)	= accScreenPicture (safeOpenFixedFont {fName = fn, fSize = fs, fStyles = []}) ps
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		# pen		= [PenFont fnt, PenColour fc, PenBack bc] 
		# ps		= setFilteredListBoxPen lbId pen ps
		# errinf	= {errinf & err_font = fnt, err_forg = fc, err_back = bc}
		# ps		= setErrInfo errinf ps
		= (ls,ps)
    left = ControlPos (Left, zero)
	fontfun name (ls,ps)
		# ls		= {EWO | ls & fn = name}
		= (ls,ps)
	sizefun size (ls,ps)
		# ls		= {EWO | ls & fs = size}
		= (ls,ps)


err_init :: !ErrPrefs *World -> *(.ErrorInfo .c,*World)
err_init {err_pos, err_siz, err_forc, err_bacc, err_fname, err_fsize, err_err, err_wrn, err_inf} w
	# (errorId,w)	= openId w
	# (infoId,w)	= openFilteredListBoxId w
	# (ebId,w) = openId w
	# (ecId,w) = openId w
	# (wbId,w) = openId w
	# (wcId,w) = openId w
	# (ibId,w) = openId w
	# (icId,w) = openId w
	# fdef			= {fName = err_fname, fSize = err_fsize, fStyles = []}
	# (efnt,w) = accScreenPicture (safeOpenFixedFont fdef) w
	# errinfo		=
		{ errorId		= errorId
		, infoId		= infoId
		, err_offset	= err_pos
		, err_font		= efnt			// now start using font in ExtListBox
		, err_size		= err_siz
		, err_forg		= err_forc
		, err_back		= err_bacc
		, err_buttonId	= ebId
		, err_countId	= ecId
		, err_count		= 0
		, err			= err_err
		, wrn_buttonId	= wbId
		, wrn_countId	= wcId
		, wrn_count		= 0
		, wrn			= err_wrn
		, inf_buttonId	= ibId
		, inf_countId	= icId
		, inf_count		= 0
		, inf			= err_inf
		}
	= (errinfo,w)

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err_shut :: !(ErrorInfo .a) -> ErrPrefs
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err_shut info
	# fdef					= getFontDef info.err_font
	# prefs					=
						 		{ err_pos		= info.err_offset
						 		, err_siz		= info.err_size
						 		, err_fname		= fdef.fName
						 		, err_fsize		= fdef.fSize
						 		, err_forc		= info.err_forg
						 		, err_bacc		= info.err_back
						 		, err_err		= info.err
						 		, err_wrn		= info.wrn
						 		, err_inf		= info.inf
						 		}
	= prefs

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IsErrorMsg	:: !String -> Bool
IsErrorMsg msg = type
where
	msglen	= size msg
	type
		| msglen > 5 && msg%(0,4)	== "Error"				= True
		| msglen > 12 && msg%(0,11)	== "Syntax error"		= True
		| msglen > 11 && msg%(0,10)	== "Parse error"		= True
		| msglen > 11 && msg%(0,10)	== "Check error"		= True
		| msglen > 11 && msg%(0,10)	== "Check Error"		= True
		| msglen > 10 && msg%(0,9)	== "Type error"			= True
		| msglen > 10 && msg%(0,9)	== "Link error"			= True
		| msglen > 12 && msg%(0,11)	== "Linker error"		= True
		| msglen > 16 && msg%(0,15)	== "Uniqueness error"	= True
		| msglen > 16 && msg%(0,15)	== "Undefined symbol"	= True
		| msglen > 17 && msg%(0,16)	== "Overloading error"	= True
															= False
IsWarningMsg	:: !String -> Bool
IsWarningMsg msg = type
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where
	msglen	= size msg
	type
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		| msglen > 7 && msg%(0,6)	== "Warning"			= True
		| msglen > 12 && msg%(0,11)	== "Type warning"		= True
		| msglen > 13 && msg%(0,12)	== "Parse warning"		= True
		| msglen > 12 && msg%(0,11)	== "Link warning"		= True
		| msglen > 14 && msg%(0,13)	== "Linker warning"		= True
															= False
//
// Extract module name and line number from error message.
//
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ParseErrorMsg	:: !String -> (!Modulename, !Int);
ParseErrorMsg msg
	|	open < msglen	&& comma1 < msglen	&& comma2 < msglen	=  (path, linenr2);
	|	open < msglen	&& comma1 < msglen	&& close1 < msglen	=  (path, linenr1);
	|	open < msglen	&& close2 < msglen						=  (path, 0); 	
																=  (EmptyPathname, 0);
where 
	path	= msg % (inc open, dec comma1);
	linenr1	= dec` (SubStringToInt 0 (inc comma1) (dec comma2) msg);
	linenr2	= dec` (SubStringToInt 0 (inc comma1) (dec close1) msg);
	msglen	= size msg;
	open	= FindOpenChar msg msglen 0;
	close1	= FindCloseChar msg msglen (inc comma1);
	close2	= FindCloseChar msg msglen (inc open);
	comma1	= FindCommaChar msg msglen (inc open);
	comma2	= FindCommaChar msg msglen (inc comma1);
	
	dec`	:: !Int -> Int;
	dec` n | n == 0	= 0;
					= dec n;
	
//	FindOpenChar	:: !String !Int !Int -> Int;
FindOpenChar str len pos	:==  FindChar '[' str len pos;

//	FindCloseChar	:: !String !Int !Int -> Int;
FindCloseChar str len pos	:==  FindChar ']' str len pos;

//	FindCommaChar	:: !String !Int !Int -> Int;
FindCommaChar str len pos	:==  FindChar ',' str len pos;

//	FindQuoteChar	:: !String !Int !Int -> Int;
FindQuoteChar str len pos	:== FindChar '\"' str len pos;
	
//	FindColonChar	:: !String !Int !Int -> Int;
FindColonChar str len pos	:== FindChar ':' str len pos;
	
FindChar	:: !Char !String !Int !Int -> Int;
FindChar c line linelen pos
	| pos >= linelen		=  pos;
	| c ==  line.[pos]		=  pos;
							=  FindChar c line linelen (inc pos);
		
SubStringToInt :: !Int !Int !Int String -> Int;
SubStringToInt acc start stop str
	| start > stop	= acc;
	# curc	= str.[start];
	| isDigit curc
		# acc`	= 10 * acc + toInt curc - toInt '0';
		= SubStringToInt acc` (inc start) stop str;
	= acc;