-- Copyright (c) 1991-2002, The Numerical Algorithms Group Ltd.
-- All rights reserved.
-- Copyright (C) 2007-2008, Gabriel Dos Reis.
-- All rights reserved.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions are
-- met:
--
--     - Redistributions of source code must retain the above copyright
--       notice, this list of conditions and the following disclaimer.
--
--     - Redistributions in binary form must reproduce the above copyright
--       notice, this list of conditions and the following disclaimer in
--       the documentation and/or other materials provided with the
--       distribution.
--
--     - Neither the name of The Numerical Algorithms Group Ltd. nor the
--       names of its contributors may be used to endorse or promote products
--       derived from this software without specific prior written permission.
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-- IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
-- OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.


import '"macros"
)package "BOOT"

-- HyperTeX Utilities for generating basic Command pages

$bcParseOnly := true

-- List of issued hypertex lines
$htLineList := nil

-- pointer to the page we are currently defining
$curPage := nil

-- List of currently active window named
$activePageList := nil

htpDestroyPage(pageName) ==
  pageName in $activePageList =>
    setDynamicBinding(pageName, nil)
    $activePageList := NREMOVE($activePageList, pageName)

htpName htPage ==
-- GENSYM whose value is the page
  ELT(htPage, 0)

htpSetName(htPage, val) ==
  SETELT(htPage, 0, val)

htpDomainConditions htPage ==
-- List of Domain conditions
  ELT(htPage, 1)

htpSetDomainConditions(htPage, val) ==
  SETELT(htPage, 1, val)

htpDomainVariableAlist htPage ==
-- alist of pattern variables and conditions
  ELT(htPage, 2)

htpSetDomainVariableAlist(htPage, val) ==
  SETELT(htPage, 2, val)

htpDomainPvarSubstList htPage ==
-- alist of user pattern variables to system vars
  ELT(htPage, 3)

htpSetDomainPvarSubstList(htPage, val) ==
  SETELT(htPage, 3, val)

htpRadioButtonAlist htPage ==
-- alist of radio button group names and labels
  ELT(htPage, 4)

htpButtonValue(htPage, groupName) ==
  for buttonName in LASSOC(groupName, htpRadioButtonAlist htPage) repeat
    (stripSpaces htpLabelInputString(htPage, buttonName)) = '"t" =>
      return buttonName

htpSetRadioButtonAlist(htPage, val) ==
  SETELT(htPage, 4, val)

htpInputAreaAlist htPage ==
-- Alist of input-area labels, and default values
  ELT(htPage, 5)

htpSetInputAreaAlist(htPage, val) ==
  SETELT(htPage, 5, val)

htpAddInputAreaProp(htPage, label, prop) ==
  SETELT(htPage, 5, [[label, nil, nil, nil, :prop], :ELT(htPage, 5)])

htpPropertyList htPage ==
-- Association list of user-defined properties
  ELT(htPage, 6)

htpProperty(htPage, propName) ==
  LASSOC(propName, ELT(htPage, 6))

htpSetProperty(htPage, propName, val) ==
  pair := assoc(propName, ELT(htPage, 6))
  pair => RPLACD(pair, val)
  SETELT(htPage, 6, [[propName, :val], :ELT(htPage, 6)])

htpLabelInputString(htPage, label) ==
-- value user typed as input string on page
  props := LASSOC(label, htpInputAreaAlist htPage)
  props and STRINGP (s := ELT(props,0)) =>
    s = '"" => s
    trimString s
  nil

htpLabelFilteredInputString(htPage, label) ==
-- value user typed as input string on page
  props := LASSOC(label, htpInputAreaAlist htPage)
  props =>
    #props > 5 and ELT(props, 6) =>
      FUNCALL(SYMBOL_-FUNCTION ELT(props, 6), ELT(props, 0))
    replacePercentByDollar ELT(props, 0)
  nil

replacePercentByDollar s == fn(s,0,MAXINDEX s) where
  fn(s,i,n) ==
    i > n => '""
    (m := charPosition(char "%",s,i)) > n => SUBSTRING(s,i,nil)
    STRCONC(SUBSTRING(s,i,m - i),'"$",fn(s,m + 1,n))

htpSetLabelInputString(htPage, label, val) ==
------------------> OBSELETE
-- value user typed as input string on page
  props := LASSOC(label, htpInputAreaAlist htPage)
  props => SETELT(props, 0, STRINGIMAGE val)
  nil

htpLabelSpadValue(htPage, label) ==
-- Scratchpad value of parsed and evaled inputString, as (type . value)
  props := LASSOC(label, htpInputAreaAlist htPage)
  props => ELT(props, 1)
  nil

htpSetLabelSpadValue(htPage, label, val) ==
-- value user typed as input string on page
  props := LASSOC(label, htpInputAreaAlist htPage)
  props => SETELT(props, 1, val)
  nil

htpLabelErrorMsg(htPage, label) ==
-- error message associated with input area
  props := LASSOC(label, htpInputAreaAlist htPage)
  props => ELT(props, 2)
  nil

htpSetLabelErrorMsg(htPage, label, val) ==
-- error message associated with input area
  props := LASSOC(label, htpInputAreaAlist htPage)
  props => SETELT(props, 2, val)
  nil

htpLabelType(htPage, label) ==
-- either 'string or 'button
  props := LASSOC(label, htpInputAreaAlist htPage)
  props => ELT(props, 3)
  nil

htpLabelDefault(htPage, label) ==
-- default value for the input area
  msg := htpLabelInputString(htPage, label) =>
    msg = '"t" => 1
    msg = '"nil" => 0
    msg
  props := LASSOC(label, htpInputAreaAlist htPage)
  props =>
    ELT(props, 4)
  nil


htpLabelSpadType(htPage, label) ==
-- pattern variable for target domain for input area
  props := LASSOC(label, htpInputAreaAlist htPage)
  props => ELT(props, 5)
  nil

htpLabelFilter(htPage, label) ==
-- string to string mapping applied to input area strings before parsing
  props := LASSOC(label, htpInputAreaAlist htPage)
  props => ELT(props, 6)
  nil

htpPageDescription htPage ==
-- a list of all the commands issued to create the basic-command page
  ELT(htPage, 7)

htpSetPageDescription(htPage, pageDescription) ==
  SETELT(htPage, 7, pageDescription)

htpAddToPageDescription(htPage, pageDescrip) ==
-------------> OBSELETE <-----------
  SETELT(htPage, 7, nconc(nreverse COPY_-LIST pageDescrip, ELT(htPage, 7)))

iht line ==
-- issue a single hyperteTeX line, or a group of lines
  $newPage => nil
  PAIRP line =>
    $htLineList := NCONC(nreverse mapStringize COPY_-LIST line, $htLineList)
  $htLineList := [basicStringize line, :$htLineList]

bcHt line ==
--line = '"\##1" => harharhar()
  iht line
  PAIRP line =>
    if $newPage then htpAddToPageDescription($curPage, [['text, :line]])
  if $newPage then htpAddToPageDescription($curPage, [['text, line]])

bcIssueHt line ==
  PAIRP line => htMakePage1 line
  iht line

mapStringize l ==
  ATOM l => l
  RPLACA(l, basicStringize CAR l)
  RPLACD(l, mapStringize CDR l)
  l

basicStringize s ==
  STRINGP s =>
    s = '"\$"      => '"\%"
    s = '"{\em $}" => '"{\em \%}"
    s
  s = '_$ => '"\%"
  PRINC_-TO_-STRING s

stringize s ==
  STRINGP s => s
  PRINC_-TO_-STRING s

htInitPage(title, propList) ==
----------------------------> OBSELETE---cannot return $curPage
-- start defining a hyperTeX page
  htInitPageNoScroll(propList, title)
  htSayStandard '"\beginscroll "
  $curPage


--htInitPageNoHeading(propList) ==
-----------------------> replaced by htInitPageNoScroll
-- start defining a hyperTeX page
--  $curPage := htpMakeEmptyPage(propList)
--  if $saturn then $saturnPage := htpMakeEmptyPage(propList)
--  $newPage := true
--  $htLineList := nil
--  $curPage

htAddHeading(title) ==
------------------------> OBSELETE
  htNewPage title
  $curPage

htShowPage() ==
-- show the page which has been computed
  htSayStandard '"\endscroll"
  htShowPageNoScroll()

htShowPageNoScroll() ==
------------------------> OBSELETE
-- show the page which has been computed
  htSayStandard '"\autobuttons"
  htpSetPageDescription($curPage, nreverse htpPageDescription $curPage)
  $newPage := false
  $htLineList := nil
  htMakePage htpPageDescription $curPage
  line := APPLY(function CONCAT, nreverse $htLineList)
  issueHT line
  endHTPage()

htMakePage itemList ==
------------------------> OBSELETE
-- make a page given the description in itemList
  if $newPage then htpAddToPageDescription($curPage, itemList)
  htMakePage1 itemList

htMakePage1 itemList ==
-- make a page given the description in itemList
  for [itemType, :items] in itemList repeat
    itemType = 'text              => iht items
    itemType = 'lispLinks         => htLispLinks items
    itemType = 'lispmemoLinks     => htLispMemoLinks items
    itemType = 'bcLinks           => htBcLinks items               --->
    itemType = 'bcLinksNS         => htBcLinks(items,true)
    itemType = 'bcLispLinks       => htBcLispLinks items           --->
    itemType = 'radioButtons      => htRadioButtons items
    itemType = 'bcRadioButtons    => htBcRadioButtons items
    itemType = 'inputStrings      => htInputStrings items
    itemType = 'domainConditions  => htProcessDomainConditions items
    itemType = 'bcStrings         => htProcessBcStrings items
    itemType = 'toggleButtons     => htProcessToggleButtons items
    itemType = 'bcButtons         => htProcessBcButtons items
    itemType = 'doneButton        => htProcessDoneButton items
    itemType = 'doitButton        => htProcessDoitButton items
    systemError ['"unknown itemType", itemType]

htMakeErrorPage htPage ==
------------------> OBSELETE
  $newPage := false
  $htLineList := nil
  $curPage := htPage
  htMakePage htpPageDescription htPage
  line := APPLY(function CONCAT, nreverse $htLineList)
  issueHT line
  endHTPage()

htQuote s ==
-- wrap quotes around a piece of hyperTeX
  iht '"_""
  iht s
  iht '"_""

htProcessToggleButtons buttons ==
  iht '"\newline\indent{5}\beginitems "
  for [message, info, defaultValue, buttonName] in buttons repeat
    if NULL LASSOC(buttonName, htpInputAreaAlist $curPage) then
      setUpDefault(buttonName, ['button, defaultValue])
    iht ['"\item{\em\inputbox[", htpLabelDefault($curPage, buttonName), '"]{",
         buttonName, '"}{\htbmfile{pick}}{\htbmfile{unpick}}\space{}"]
    bcIssueHt message
    iht '"\space{}}"
    bcIssueHt info
  iht '"\enditems\indent{0} "

htProcessBcButtons buttons ==
  for [defaultValue, buttonName] in buttons repeat
    if NULL LASSOC(buttonName, htpInputAreaAlist $curPage) then
      setUpDefault(buttonName, ['button, defaultValue])
    k := htpLabelDefault($curPage,buttonName)
    k = 0 => iht ['"\off{",buttonName,'"}"]
    k = 1 => iht ['"\on{", buttonName,'"}"]
    iht ['"\inputbox[", htpLabelDefault($curPage, buttonName), '"]{",
         buttonName, '"}{\htbmfile{pick}}{\htbmfile{unpick}}"]

htProcessBcStrings strings ==
---------------------> OBSELETE <------------------------
  for [numChars, default, stringName, spadType, :filter] in strings repeat
    mess2 := '""
    if NULL LASSOC(stringName, htpInputAreaAlist $curPage) then
      setUpDefault(stringName, ['string, default, spadType, filter])
    if htpLabelErrorMsg($curPage, stringName) then
      iht ['"\centerline{{\em ", htpLabelErrorMsg($curPage, stringName), '"}}"]
      mess2 := CONCAT(mess2, bcSadFaces())
      htpSetLabelErrorMsg($curPage, stringName, nil)
    iht ['"\inputstring{", stringName, '"}{",
         numChars, '"}{", htpLabelDefault($curPage,stringName), '"} ", mess2]

bcSadFaces() ==
  '"\space{1}{\em\htbitmap{error}\htbitmap{error}\htbitmap{error}}"

htLispLinks(links,:option) ==
  [links,options] := beforeAfter('options,links)
  indent := LASSOC('indent,options) or 5
  iht '"\newline\indent{"
  iht stringize indent
  iht '"}\beginitems"
  for [message, info, func, :value] in links repeat
    iht '"\item["
    call := (IFCAR option => '"\lispmemolink"; '"\lispdownlink")
    htMakeButton(call,message, mkCurryFun(func, value))
    iht ['"]\space{}"]
    bcIssueHt info
  iht '"\enditems\indent{0} "

htLispMemoLinks(links) == htLispLinks(links,true)

htBcLinks(links,:options) ==
-------------------------> OBSELETE
  skipStateInfo? := IFCAR options
  [links,options] := beforeAfter('options,links)
  for [message, info, func, :value] in links repeat
    htMakeButton('"\lispdownlink",message,
                   mkCurryFun(func, value),skipStateInfo?)
    bcIssueHt info

htBcLispLinks links ==
-------------------------> OBSELETE
  [links,options] := beforeAfter('options,links)
  for [message, info, func, :value] in links repeat
    htMakeButton('"\lisplink",message, mkCurryFun(func, value))
    bcIssueHt info

beforeAfter(x,u) == [[y for [y,:r] in tails u while x ^= y],r]

mkCurryFun(fun, val) ==
  name := GENSYM()
  code :=
    ['DEFUN, name, '(arg), ['APPLY, MKQ fun, ['CONS, 'arg, MKQ val]]]
  EVAL code
  name

htRadioButtons [groupName, :buttons] ==
  htpSetRadioButtonAlist($curPage, [[groupName, :buttonNames buttons],
                                    : htpRadioButtonAlist $curPage])
  boxesName := GENSYM()
  iht ['"\newline\indent{5}\radioboxes{", boxesName,
     '"}{\htbmfile{pick}}{\htbmfile{unpick}}\beginitems "]
  defaultValue := '"1"
  for [message, info, buttonName] in buttons repeat
    if NULL LASSOC(buttonName, htpInputAreaAlist $curPage) then
      setUpDefault(buttonName, ['button, defaultValue])
      defaultValue := '"0"
    iht ['"\item{\em\radiobox[", htpLabelDefault($curPage, buttonName), '"]{",
         buttonName, '"}{",boxesName, '"}\space{}"]
    bcIssueHt message
    iht '"\space{}}"
    bcIssueHt info
  iht '"\enditems\indent{0} "

htBcRadioButtons [groupName, :buttons] ==
  htpSetRadioButtonAlist($curPage, [[groupName, :buttonNames buttons],
                                    : htpRadioButtonAlist $curPage])
  boxesName := GENSYM()
  iht ['"\radioboxes{", boxesName,
     '"}{\htbmfile{pick}}{\htbmfile{unpick}} "]
  defaultValue := '"1"
  for [message, info, buttonName] in buttons repeat
    if NULL LASSOC(buttonName, htpInputAreaAlist $curPage) then
      setUpDefault(buttonName, ['button, defaultValue])
      defaultValue := '"0"
    iht ['"{\em\radiobox[", htpLabelDefault($curPage, buttonName), '"]{",
         buttonName, '"}{",boxesName, '"}"]
    bcIssueHt message
    iht '"\space{}}"
    bcIssueHt info

setUpDefault(name, props) ==
---------------> OBSELETE <----------------
  htpAddInputAreaProp($curPage, name, props)

buttonNames buttons ==
  [buttonName for [.,., buttonName] in buttons]

htInputStrings strings ==
  iht '"\newline\indent{5}\beginitems "
  for [mess1, mess2, numChars, default, stringName, spadType, :filter]
   in strings repeat
    if NULL LASSOC(stringName, htpInputAreaAlist $curPage) then
      setUpDefault(stringName, ['string, default, spadType, filter])
    if htpLabelErrorMsg($curPage, stringName) then
      iht ['"\centerline{{\em ", htpLabelErrorMsg($curPage, stringName), '"}}"]

      mess2 := CONCAT(mess2, bcSadFaces())
      htpSetLabelErrorMsg($curPage, stringName, nil)
    iht '"\item "
    bcIssueHt mess1
    iht ['"\inputstring{", stringName, '"}{",
         numChars, '"}{", htpLabelDefault($curPage,stringName), '"} "]
    bcIssueHt mess2
  iht '"\enditems\indent{0}\newline "

htProcessDomainConditions condList ==
  htpSetDomainConditions($curPage, renamePatternVariables condList)
  htpSetDomainVariableAlist($curPage, computeDomainVariableAlist())

renamePatternVariables condList ==
  htpSetDomainPvarSubstList($curPage,
    renamePatternVariables1(condList, nil, $PatternVariableList))
  substFromAlist(condList, htpDomainPvarSubstList $curPage)

renamePatternVariables1(condList, substList, patVars) ==
  null condList => substList
  [cond, :restConds] := condList
  cond is ['isDomain, pv, pattern] or cond is ['ofCategory, pv, pattern]
    or cond is ['Satisfies, pv, cond] =>
      if pv = $EmptyMode then nsubst := substList
      else nsubst := [[pv, :car patVars], :substList]
      renamePatternVariables1(restConds, nsubst, rest patVars)
  substList

substFromAlist(l, substAlist) ==
  for [pvar, :replace] in substAlist repeat
    l := SUBST(replace, pvar, l)
  l

computeDomainVariableAlist() ==
  [[pvar, :pvarCondList pvar] for [., :pvar] in
    htpDomainPvarSubstList $curPage]

pvarCondList pvar ==
  nreverse pvarCondList1([pvar], nil, htpDomainConditions $curPage)

pvarCondList1(pvarList, activeConds, condList) ==
  null condList => activeConds
  [cond, : restConds] := condList
  cond is [., pv, pattern] and pv in pvarList =>
    pvarCondList1(nconc(pvarList, pvarsOfPattern pattern),
                  [cond, :activeConds], restConds)
  pvarCondList1(pvarList, activeConds, restConds)

pvarsOfPattern pattern ==
  NULL LISTP pattern => nil
  [pvar for pvar in rest pattern | pvar in $PatternVariableList]

htMakeTemplates(templateList, numLabels) ==
  templateList := [templateParts template for template in templateList]
  [[substLabel(i, template) for template in templateList]
    for i in 1..numLabels] where substLabel(i, template) ==
      PAIRP template =>
        INTERN CONCAT(first template, PRINC_-TO_-STRING i, rest template)
      template

templateParts template ==
  NULL STRINGP template => template
  i := SEARCH('"%l", template)
  null i => template
  [SUBSEQ(template, 0, i), : SUBSEQ(template, i+2)]

htMakeDoneButton(message, func) ==
  bcHt '"\newline\vspace{1}\centerline{"
  if message = '"Continue" then
    bchtMakeButton('"\lispdownlink", "\ContinueBitmap", func)
  else
    bchtMakeButton('"\lispdownlink",CONCAT('"\box{", message, '"}"), func)
  bcHt '"} "

htProcessDoneButton [label , func] ==
  iht '"\newline\vspace{1}\centerline{"

  if label = '"Continue" then
    htMakeButton('"\lispdownlink", "\ContinueBitmap", func)
  else if label = '"Push to enter names" then
    htMakeButton('"\lispdownlink",'"\ControlBitmap{ClickToSet}", func)
  else
    htMakeButton('"\lispdownlink", CONCAT('"\box{", label, '"}"), func)

  iht '"} "

htMakeButton(htCommand, message, func,:options) ==
----------> OBSELETE <----------------------------------
  skipStateInfo? := IFCAR options
  iht [htCommand, '"{"]
  bcIssueHt message
  skipStateInfo? =>
    iht ['"}{(|htDoneButton| '|", func, '"| ",htpName $curPage, '")}"]
  iht ['"}{(|htDoneButton| '|", func, '"| (PROGN "]
  for [id, ., ., ., type, :.] in htpInputAreaAlist $curPage repeat
    iht ['"(|htpSetLabelInputString| ", htpName $curPage, '"'|", id, '"| "]
    if type = 'string then
      iht ['"_"\stringvalue{", id, '"}_""]
    else
      iht ['"_"\boxvalue{", id, '"}_""]
    iht '") "
  iht [htpName $curPage, '"))}"]

bchtMakeButton(htCommand, message, func) ==
  bcHt [htCommand, '"{", message,
       '"}{(|htDoneButton| '|", func, '"| (PROGN "]
  for [id, ., ., ., type, :.] in htpInputAreaAlist $curPage repeat
    bcHt ['"(|htpSetLabelInputString| ", htpName $curPage, '"'|", id, '"| "]
    if type = 'string then
      bcHt ['"_"\stringvalue{", id, '"}_""]
    else
      bcHt ['"_"\boxvalue{", id, '"}_""]
    bcHt '") "
  bcHt [htpName $curPage, '"))} "]

htProcessDoitButton [label, command, func] ==
  fun := mkCurryFun(func, [command])
  iht '"\newline\vspace{1}\centerline{"
  htMakeButton('"\lispcommand", CONCAT('"\box{", label, '"}"), fun)
  iht '"} "
  iht '"\vspace{2}{Select \  \UpButton{} \  to go back one page.}"
  iht '"\newline{Select \  \ExitButton{QuitPage} \  to remove this window.}"

htMakeDoitButton(label, command) ==
  -- use bitmap button if just plain old "Do It"
  if label = '"Do It" then
    bcHt '"\newline\vspace{1}\centerline{\lispcommand{\DoItBitmap}{(|doDoitButton| "
  else
    bcHt ['"\newline\vspace{1}\centerline{\lispcommand{\box{", label,
       '"}}{(|doDoitButton| "]
  bcHt htpName $curPage
  bcHt ['" _"", htEscapeString command, '"_""]
  bcHt '")}}"

  bcHt '"\vspace{2}{Select \  \UpButton{} \  to go back one page.}"
  bcHt '"\newline{Select \  \ExitButton{QuitPage} \  to remove this window.}"

doDoitButton(htPage, command) ==
  executeInterpreterCommand command

executeInterpreterCommand command ==
  PRINC command
  TERPRI()
  ncSetCurrentLine(command)
  CATCH('SPAD__READER, parseAndInterpret command)
  PRINC MKPROMPT()
  FINISH_-OUTPUT()

htDoneButton(func, htPage) ==
  typeCheckInputAreas htPage =>
    htMakeErrorPage htPage
  NULL FBOUNDP func =>
    systemError ['"unknown function", func]
  FUNCALL(SYMBOL_-FUNCTION func, htPage)

typeCheckInputAreas htPage ==
  -- This needs to be severly beefed up
  inputAlist := nil
  errorCondition := false
  for entry in htpInputAreaAlist htPage
   | entry is [stringName, ., ., ., 'string, ., spadType, filter] repeat
    condList :=
      LASSOC(LASSOC(spadType,htpDomainPvarSubstList htPage),
             htpDomainVariableAlist htPage)
    string := htpLabelFilteredInputString(htPage, stringName)
    $bcParseOnly =>
      null ncParseFromString string =>
        htpSetLabelErrorMsg(htPage, '"Syntax Error", '"Syntax Error")
      nil
    val := checkCondition(htpLabelInputString(htPage, stringName),
                          string, condList)
    STRINGP val =>
      errorCondition := true
      htpSetLabelErrorMsg(htPage, stringName, val)
    htpSetLabelSpadValue(htPage, stringName, val)
  errorCondition

checkCondition(s1, string, condList) ==
  condList is [['Satisfies, pvar, pred]] =>
    val := FUNCALL(pred, string)
    STRINGP val => val
    ['(String), :wrap s1]
  condList isnt [['isDomain, pvar, pattern]] =>
    systemError '"currently invalid domain condition"
  pattern is '(String) => ['(String), :wrap s1]
  val := parseAndEval string
  STRINGP val =>
    val = '"Syntax Error " => '"Error: Syntax Error "
    condErrorMsg pattern
  [type, : data] := val
  newType := CATCH('SPAD__READER, resolveTM(type, pattern))
  null newType =>
    condErrorMsg pattern
  coerceInt(val, newType)

condErrorMsg type ==
  typeString := form2String type
  if PAIRP typeString then typeString := APPLY(function CONCAT, typeString)
  CONCAT('"Error: Could not make your input into a ", typeString)

parseAndEval string ==
  $InteractiveMode :fluid := true
  $BOOT: fluid := NIL
  $SPAD: fluid := true
  $e:fluid := $InteractiveFrame
  $QuietCommand:local := true
  parseAndEval1 string

parseAndEval1 string ==
  syntaxError := false
  pform :=
    v := applyWithOutputToString('ncParseFromString, [string])
    CAR v => CAR v
    syntaxError := true
    CDR v
  syntaxError =>
     '"Syntax Error "
  pform =>
    val := applyWithOutputToString('processInteractive, [pform, nil])
    CAR val => CAR val
    '"Type Analysis Error"
  nil

oldParseString string ==
  tree := applyWithOutputToString('string2SpadTree, [string])
  CAR tree => parseTransform postTransform CAR tree
  CDR tree

makeSpadCommand(:l) ==
  opForm := CONCAT(first l, '"(")
  lastArg := last l
  l := rest l
  argList := nil
  for arg in l while arg ^= lastArg repeat
    argList := [CONCAT(arg, '", "), :argList]
  argList := nreverse [lastArg, :argList]
  CONCAT(opForm, APPLY(function CONCAT, argList), '")")

htMakeInputList stringList ==
-- makes an input form for constructing a list
  lastArg := last stringList
  argList := nil
  for arg in stringList while arg ^= lastArg repeat
    argList := [CONCAT(arg, '", "), :argList]
  argList := nreverse [lastArg, :argList]
  bracketString APPLY(function CONCAT, argList)


-- predefined filter strings
bracketString string == CONCAT('"[",string,'"]")

quoteString string == CONCAT('"_"", string, '"_"")

$funnyQuote := char 127
$funnyBacks := char 128

htEscapeString str ==
  str := SUBSTITUTE($funnyQuote, char '_", str)
  SUBSTITUTE($funnyBacks, char '_\, str)

unescapeStringsInForm form ==
  STRINGP form =>
    str := NSUBSTITUTE(char '_", $funnyQuote, form)
    NSUBSTITUTE(char '_\, $funnyBacks, str)
  CONSP form =>
    unescapeStringsInForm CAR form
    unescapeStringsInForm CDR form
    form
  form