frink.fsp - Frink Server Pages Highlighter

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            "http://www.w3.org/TR/html4/strict.dtd">
<HTML LANG="en">
<HEAD>

  <TITLE>Frink Web-based Interface</TITLE>
  <META HTTP-EQUIV="Default-Style" CONTENT="APE Airy">
  <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=utf-8">
  <META NAME="viewport" CONTENT="width=device-width, initial-scale=1.0">
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        TYPE="text/css" TITLE="Spaceship">
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        TITLE="Compact">
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  <LINK REL="canonical" HREF="https://frinklang.org/fsp/frink.fsp">
</HEAD>
<% focusOn=lookup ? "f2.lookup" : "f1.fromVal" %>
<BODY onLoad="document.$focusOn.focus()">
  <H1>Frink Web-based Interface</H1>
  <P CLASS="CENTER">
   <A HREF="/frinkdocs/">Frink Documentation</A> *
   <A HREF="/frinkdocs/whatsnew.html">What's New</A> *
   <A HREF="/frinkdocs/faq.html">FAQ</A> *
   <A HREF="/frinkdocs/index.html#JavaWebStart">Download Frink</A> *
   <A HREF="/frinkdocs/FrinkApplet.html">Frink Applet</A> *
   <A
HREF="/frinkdocs/fspdocs.html">Frink Server Pages Docs</A> *
   <A HREF="samples.fsp">Sample Programs</A> *
   <A HREF="mailto:eliasen@mindspring.com">Contact Alan Eliasen</A> *
   <A HREF="/frinkdocs/android.html">Frink on Android</A> *
   <A HREF="/frinkdocs/donate.html">Donate</A>
  </P>

  <A NAME="calc"></A>
  <FORM ACTION="frink.fsp#calc" METHOD="GET" NAME="f1">

   <%
       prog = undef

       if fromVal
       {
          println["<TABLE BORDER=\"0\">"]
          println["<TR><TD VALIGN=\"top\" CLASS=\"noborder\"><B>From:</B><TD CLASS=\"noborderlit\">" + HTMLEncode[fromVal]]

          if (toVal)
          {
             println["<TR><TD CLASS=\"noborder\"><B>To:</B><TD CLASS=\"noborderlit\">" + HTMLEncode[toVal]]
             prog = "$fromVal -> $toVal"
          } else
              prog = fromVal

          println["<TR><TD VALIGN=TOP CLASS=\"noborder\"><B>Result:</B><TD CLASS=\"noborderlit\">"]

          result = undef

          // Evaluate and throw exceptions.  This may print output that we
          // want to format so we turn on HTML encoding.

          // THINK ABOUT:
          // Unfortunately, we can't do this in a try/catch block because
          // the try block creates a new ContextFrame which means that
          // any variables we set disappear at the end of the ContextFrame
          // and we can't do persistent calculations.
//          try
//          {
     setHTMLEncode[true]
             result = eval[prog, true]
//          }
//          finally
//          {
             setHTMLEncode[false]
//          }

  result = "$result"  // Coerce to string in all cases.
          result = HTMLEncode[result]
          result =~ %s/(\n\r?|\r\n?)/<BR>\n/g

          // Highlight undefined symbols
          result =~ %s/((\w+)\s*$undefined symbol$)/<SPAN class="warning">$1<\/SPAN>/ig
          println["<A NAME=results>$result</A>"]
          println["</TABLE>"]
      }

      if prog
      {
         toVal = toVal ? toVal : ""
         fromVal = fromVal ? fromVal : ""
         result = result ? result : ""
         println[getHints[prog, fromVal, toVal, result]]
      }
   %>

   <P>

  <A NAME="lookup"></A>
  <FORM ACTION="frink.fsp#lookup" METHOD="GET" NAME="f2">
   <TABLE CLASS="back">
   <TR><TD CLASS="noborder">
   <LABEL FOR="lookup">Lookup:</LABEL>
   <INPUT TYPE="TEXT" NAME="lookup" SIZE=20 ID="lookup"  autocapitalize="none"
    autocorrect="none">
   <INPUT TYPE="CHECKBOX" NAME="exactMatch" ID="exactMatch"><LABEL FOR="exactMatch">Exact match only</LABEL>
   <TR><TD CLASS="noborder">
    <INPUT TYPE="SUBMIT" VALUE="Lookup">
   </TABLE>
   <HR>

    <%
      // Look up word
      if lookup
      {
         if (lookup =~ %r/\S+\s+\S+/)
            println["<P CLASS=\"warning\"><B>Please enter only one word (or part of a word) into the lookup field.<BR>\nFor example, if you want to find out what Frink knows about the earth, enter \"earth\" in the lookup box.  To find out what different types of cubits have been used around the world, enter \"cubit\" in the lookup box.</B></P>"]

         if (exactMatch)
            pat = regex["^$lookup\b"]
         else
            pat = regex["$lookup","i"]

         for [line] lines["file:///$FSPRoot/../../data/units.txt"]
         {
            if (line =~ pat)
            {
               line = HTMLEncode[line]
               line =~ %s/^([^ \/]+)/<B>$1<\/B>/    // Put unit name in bold
               line =~ %s/\/\/\s*(.*)/ <I>[$1]<\/I>/
               println["$line<BR>"]
            }
        }
    }
  %>

  <DIV CLASS="back">
  <P>
   If you don't know what this page is for, please look at the <A HREF="/frinkdocs/">Frink documentation</A> and some <A HREF="/frinkdocs/#SampleCalculations">sample calculations</A> first.
  </P>

  <P>
   In this web interface, you can enter any arbitrarily complex Frink
   expression (see the <A HREF="/frinkdocs/">documentation</A>) in the "From:"
   box and click "Calculate".  If you also enter a value in the "To:" box, it
   is treated as the right-hand side of a conversion expression (that is, to
   the right of the conversion operator <CODE>-></CODE> )
  </P>

  <P>
   Thus, to convert 10 meters to feet, you can enter
   <CODE CLASS="input">10 meters</CODE> in the "From" box and
   <CODE CLASS="input">feet</CODE> in the "To" box, or, equivalently, type
   <CODE CLASS="input">10 meters -> feet</CODE> in the
   "From" box and leave the "To" box empty.  It does exactly the same thing.
  </P>

  <P>
   Didn't find the unit you were looking for?  Got "undefined symbol" or other
   errors?  Try reading the <A HREF="/frinkdocs/faq.html">FAQ</A> for common
   issues.  Frink is case-sensitive.  To find the name Frink uses for an
   obscure unit, type part or all of the word in the "Lookup" box (in upper-
   <EM>or</EM> lower-case; the lookup is not case-sensitive) and click the
   "Lookup" button, or, better yet, if you're, say, looking for information
   about the moon, type <CODE CLASS="input">??moon</CODE> in the "From:" box
   and click the "Calculate" button.  See the <A
   HREF="/frinkdocs/index.html#IntegratedHelp">Integrated Help</A> section of
   the documentation for more ways to look up units.
  </P>

  <P>
   <I>Note:</I> You can now set variables in this interface that will last for
   the duration of your session.
  <P>

  <P>
   This is powered by <A HREF="/frinkdocs/fspdocs.html">Frink Server
    Pages.</A>  Can your browser handle Java 1.3.1 or later?  Try the
   <A HREF="/frinkdocs/FrinkApplet.html">applet-based Frink interface</A> or
   <A HREF="/frinkdocs/index.html#JavaWebStart">Download Frink</A> onto
   your own computer.
  </P>

  <P>
   Back to <A HREF="/frinkdocs/fspdocs.html">Frink Server Pages
    documentation.</A>
  </P>
  </DIV>
  <% } // end "if hide %>

  <P>
   Please report any comments, questions, suggestions, or errors to
   <A HREF="mailto:eliasen@mindspring.com">Alan Eliasen</A>.
  </P>

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frink.fsp - Frink Server Pages highlighter