--- loncom/homework/edit.pm	2002/03/22 14:45:11	1.31
+++ loncom/homework/edit.pm	2007/10/03 00:24:48	1.112
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # edit mode helpers
 #
-# $Id: edit.pm,v 1.31 2002/03/22 14:45:11 matthew Exp $
+# $Id: edit.pm,v 1.112 2007/10/03 00:24:48 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -25,418 +25,924 @@
 #
 # http://www.lon-capa.org/
 #
-# 3/20 Guy
-# 01/10/02 Matthew
-# 03/06/02 Matthew
+
 package Apache::edit; 
 
 use strict;
 use Apache::lonnet;
+use HTML::Entities();
+use Apache::lonlocal;
+use lib '/home/httpd/lib/perl/';
+use LONCAPA;
+ 
 
 # Global Vars
 # default list of colors to use in editing
 @Apache::edit::colorlist=('#ffffff','#ff0000','#00ff00','#0000ff','#0ff000','#000ff0','#f0000f');
 # depth of nesting of edit
 $Apache::edit::colordepth=0;
+@Apache::edit::inserttag=();
+# image-type responses: active background image and curdepth at definition
+$Apache::edit::bgimgsrc='';
+$Apache::edit::bgimgsrccurdepth='';
 
 sub initialize_edit {
-  $Apache::edit::colordepth=0;
+    $Apache::edit::colordepth=0;
+    @Apache::edit::inserttag=();
 }
 
 sub tag_start {
-  my ($target,$token,$description) = @_;
-  my $result='';
-  if ($target eq "edit") {
-    my $tag=$token->[1];
-    if (!$description) {
-      $description=&Apache::lonxml::description($token);
-      if (!$description) { $description="<$tag>"; }
-    }
-    $result.= &start_table($token)."<tr><td>$description</td>
-<td>Delete".
-  &deletelist($target,$token)
-  ."</td>
-<td>".
-    &insertlist($target,$token).&end_row().&start_spanning_row();
+    my ($target,$token,$description) = @_;
+    my $result='';
+    if ($target eq "edit") {
+	my $tag=$token->[1];
+	if (!$description) {
+	    $description=&Apache::lonxml::description($token);
+	    if (!$description) { $description="&lt;$tag&gt;"; }
+	}
+	$result.= &start_table($token)."<tr><td>$description</td>
+                      <td>Delete".
+		      &deletelist($target,$token)
+		      ."</td>
+                       <td>".
+		       &insertlist($target,$token);
 #<td>". 
 #  &movebuttons($target,$token).
 #    "</tr><tr><td colspan=\"3\">\n";
-  }
-  return $result;
+	my @help = Apache::lonxml::helpinfo($token);
+	if ($help[0]) {
+	    $result .= '</td><td align="right" valign="top">' .
+		Apache::loncommon::help_open_topic(@help);
+	} else { $result .= "</td><td>&nbsp;"; }
+	$result .= &end_row().&start_spanning_row();
+    }
+    return $result;
 }
 
 sub tag_end {
-  my ($target,$token,$description) = @_;
-  my $result='';
-  if ($target eq 'edit') {
-    my $tag=$token->[1];
-    if (!defined($description)) {
-      $result.="</td></tr><tr><td>&lt;/$tag&gt;</td><td colspan=\"2\">&nbsp;</td>";
-    } else {
-      if ($description ne '') { $result.="</td></tr><tr><td>$description</td><td colspan=\"2\">&nbsp;</td>"; }
+    my ($target,$token,$description) = @_;
+    my $result='';
+    if ($target eq 'edit') {
+	$result.="</td></tr>".&end_table()."\n";
     }
-    $result.="</tr>".&end_table()."\n";
-  }
-  return $result;
+    return $result;
 }
 
 sub start_table {
-  my ($token)=@_;
-  my $tag = $token->[1];
-  my $tagnum;
-  foreach my $namespace (reverse @Apache::lonxml::namespace) {
-    my $testtag=$namespace.'::'.$tag;
-    $tagnum=$Apache::lonxml::insertlist{"$testtag.num"};
-    if (defined($tagnum)) { last; }
-  }
-  if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
-  my $color = $Apache::lonxml::insertlist{"$tagnum.color"};
-  if (!defined($color)) {
-    $color = $Apache::edit::colorlist[$Apache::edit::colordepth];
-  }
-  $Apache::edit::colordepth++;
-  my $result="<table bgcolor=\"$color\" width=\"100%\" border=\"5\">";
-  return $result;
+    my ($token)=@_;
+    my $tag = &Apache::lonxml::get_tag($token);
+    
+    my $color = $Apache::lonxml::insertlist{"$tag.color"};
+    &Apache::lonxml::debug(" $tag -- $color");
+    if (!defined($color)) {
+	$color = $Apache::edit::colorlist[$Apache::edit::colordepth];
+    }
+    $Apache::edit::colordepth++;
+    push(@Apache::edit::inserttag,$token->[1]);
+    my $result='<div align="right">';
+    $result.='<table bgcolor="'.$color.'" width="97%" border="0" cellspacing="5" cellpadding="3">';
+    return $result;
 }
 
 sub end_table {
-  $Apache::edit::colordepth--;
-  my $result="</table>";
-  return $result;
+    $Apache::edit::colordepth--;
+    my $result='</table></div>';
+    $result.='<div align="left"><table><tr><td>';
+
+    my ($tagname,$closingtag);
+    if (defined($Apache::edit::inserttag[-2])) {
+	$tagname=$Apache::edit::inserttag[-2];
+    } else {
+	if ($Apache::lonhomework::parsing_a_task) {
+	    $tagname='Task';
+	} else {
+	    $tagname='problem';
+	}
+    }
+    if (defined($Apache::edit::inserttag[-1])) {
+	$closingtag=$Apache::edit::inserttag[-1];
+    }
+    $result.=&innerinsertlist('edit',$tagname,$closingtag).
+	"</td></tr></table></div>";
+    my $last = pop(@Apache::edit::inserttag);
+    return $result;
 }
 
-sub start_spanning_row { return '<tr><td colspan="3">';}
-sub start_row          { return '<tr><td>';            }
+sub start_spanning_row { return '<tr><td colspan="4" bgcolor="#DDDDDD">';}
+sub start_row          { return '<tr><td bgcolor="#DDDDDD">';            }
 sub end_row            { return '</td></tr>';          }
 
 sub movebuttons {
-  my ($target,$token) = @_;
-  my $result='<input type="submit" name="moveup.'.
-    $Apache::lonxml::curdepth.'" value="Move Up" />';
-  $result.='<input type="submit" name="movedown.'.
-    $Apache::lonxml::curdepth.'" value="Move Down" />';
-  return $result;
+    my ($target,$token) = @_;
+    my $result='<input type="submit" name="moveup.'.
+	$Apache::lonxml::curdepth.'" value="Move Up" />';
+    $result.='<input type="submit" name="movedown.'.
+	$Apache::lonxml::curdepth.'" value="Move Down" />';
+    return $result;
 }
 
 sub deletelist {
-  my ($target,$token) = @_;
-  my $result = "<select name=\"delete_$Apache::lonxml::curdepth\">
+    my ($target,$token) = @_;
+    my $result = "<select name=\"delete_$Apache::lonxml::curdepth\">
 <option></option>
 <option>Yes</option>
 </select>";
-  return $result;
+    return $result;
 }
 
 sub handle_delete {
-  if (!$ENV{"form.delete_$Apache::lonxml::curdepth"}) { return ''; }
-  my ($space,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-  my $result=0;
-  if ($space) {
-    my $sub1="$space\:\:delete_$token->[1]";
-    {
-      no strict 'refs';
-      if (defined &$sub1) {
-	$result=&$sub1($target,$token,$tagstack,$parstack,$parser,$safeeval,$style);
-      }
-    }
-  }
-  if (!$result) {
-    my $endtag='/'.$token->[1];
-    my $bodytext=&Apache::lonxml::get_all_text($endtag,$$parser[$#$parser]);
-    $$parser['-1']->get_token();
-    &Apache::lonxml::debug("Deleting :$bodytext: for $token->[1]");
-    &Apache::lonxml::end_tag($tagstack,$parstack,$token);
-  }
-  return 1;
+    if (!$env{"form.delete_$Apache::lonxml::curdepth"}) { return ''; }
+    my ($space,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $result=0;
+    if ($space) {
+	my $sub1="$space\:\:delete_$token->[1]";
+	{
+	    no strict 'refs';
+	    if (defined &$sub1) {
+		$result=&$sub1($target,$token,$tagstack,$parstack,$parser,$safeeval,$style);
+	    }
+	}
+    }
+    if (!$result) {
+	my $endtag='/'.$token->[1];
+	my $bodytext=&Apache::lonxml::get_all_text($endtag,$parser,$style);
+	$$parser['-1']->get_token();
+	&Apache::lonxml::debug("Deleting :$bodytext: for $token->[1]");
+	&Apache::lonxml::end_tag($tagstack,$parstack,$token);
+    }
+    return 1;
 }
 
 sub get_insert_list {
-  my ($token) = @_;
-  my $result='';
-  my @tagnums= ();
-  #&Apache::lonxml::debug("keys ".join("\n",sort(keys(%Apache::lonxml::insertlist))));
-  if ($Apache::lonxml::insertlist{"$token->[1].which"}) {
-    push (@tagnums, @{ $Apache::lonxml::insertlist{"$token->[1].which"} });
-  }
-  foreach my $namespace (@Apache::lonxml::namespace) {
-    if ($Apache::lonxml::insertlist{"$namespace".'::'."$token->[1].which"}) {
-      push (@tagnums, @{ $Apache::lonxml::insertlist{"$namespace".'::'."$token->[1].which"} });
-    }
-  }
-  if (@tagnums) {
-    foreach my $tagnum (@tagnums) {
-      $result.='<option value="'.$tagnum.'">'.$Apache::lonxml::insertlist{"$tagnum.description"}."</option>\n";
-    }
-    if ($result) { $result='<option selected="on"></option>'.$result; }
-  }
-  return $result;
+    my ($tagname) = @_;
+    my $result='';
+    my @tags= ();
+    #&Apache::lonxml::debug("keys ".join("\n",sort(keys(%Apache::lonxml::insertlist))));
+    if ($Apache::lonxml::insertlist{"$tagname.which"}) {
+	push (@tags, @{ $Apache::lonxml::insertlist{"$tagname.which"} });
+    }
+    foreach my $namespace (@Apache::lonxml::namespace) {
+	if ($Apache::lonxml::insertlist{"$namespace".'::'."$tagname.which"}) {
+	    push (@tags, @{ $Apache::lonxml::insertlist{"$namespace".'::'."$tagname.which"} });
+	}
+    }
+    if (@tags) {
+	my %options;
+	foreach my $tag (@tags) {
+	    my $descrip=$Apache::lonxml::insertlist{"$tag.description"};
+	    my $tagnum =$Apache::lonxml::insertlist{"$tag.num"};
+	    $options{$descrip} ="<option value=\"$tagnum\">".
+		$descrip."</option>\n";
+	}
+	foreach my $option (sort(keys(%options))) {$result.=$options{$option};}
+	if ($result) { $result='<option selected="selected"></option>'.$result; }
+    }
+    return $result;
 }
 
 sub insertlist {
-  my ($target,$token) = @_;
-  my $result;
-  if ($target eq 'edit') {
-    my $optionlist= &get_insert_list($token);
-    if ($optionlist) {
-      $result = "Insert:
-<select name=\"insert_$Apache::lonxml::curdepth\">
-$optionlist
-</select>"
-    } else {
-      $result="&nbsp;";
+    my ($target,$token) = @_;
+    return &innerinsertlist($target,$token->[1]);
+}
+
+sub innerinsertlist {
+    my ($target,$tagname,$closingtag) = @_;
+    my $result;
+    my $after='';
+    if ($closingtag) {
+	$after='_after_'.$closingtag; 
+    }
+    if ($target eq 'edit') {
+	my $optionlist= &get_insert_list($tagname);
+	if ($optionlist) {
+	    $result = "Insert:
+            <select name=\"insert$after\_$Apache::lonxml::curdepth\">
+                  $optionlist
+            </select>"
+	} else {
+	    $result="&nbsp;";
+	}
     }
-  }
-  return $result;
+    return $result;
 }
 
 sub handle_insert {
-  if ($ENV{"form.insert_$Apache::lonxml::curdepth"} eq '') { return ''; }
-  my $result;
-  my $tagnum = $ENV{"form.insert_$Apache::lonxml::curdepth"};
-  my $func=$Apache::lonxml::insertlist{"$tagnum.function"};
-  if ($func eq 'default') {
-    my $newtag=$Apache::lonxml::insertlist{"$tagnum.tag"};
-    my $namespace;
-    if ($newtag =~ /::/) { ($namespace,$newtag) = split(/::/,$newtag); }
-    $result.="\n<$newtag>\n</$newtag>";
-  } else {
-    if (defined(&$func)) {
-      {
-	no strict 'refs';
-	$result.=&$func();
-      }
+    if ($env{"form.insert_$Apache::lonxml::curdepth"} eq '') { return ''; }
+    my $tagnum = $env{"form.insert_$Apache::lonxml::curdepth"};
+    return &do_insert($tagnum);
+}
+
+sub handle_insertafter {
+    my $tagname=shift;
+    if ($env{"form.insert_after_$tagname\_$Apache::lonxml::curdepth"} eq '') {
+	return '';
+    }
+    my $tagnum =$env{"form.insert_after_$tagname\_$Apache::lonxml::curdepth"};
+    return &do_insert($tagnum,1);
+}
+
+sub do_insert {
+    my ($tagnum,$after) = @_;
+    my $result;
+
+    my $newtag = $Apache::lonxml::insertlist{"$tagnum.tag"};
+    my $func   = $Apache::lonxml::insertlist{"$newtag.function"};
+    if ($func eq 'default') {
+	my $namespace;
+	if ($newtag =~ /::/) { ($namespace,$newtag) = split(/::/,$newtag); }
+	my $depth = scalar(@Apache::lonxml::depthcounter);
+	$depth -- if ($after);
+	my $inset = "\t"x$depth;
+	$result.="\n$inset<$newtag>\n$inset</$newtag>";
     } else {
-      my $newtag=$Apache::lonxml::insertlist{"$tagnum.tag"};
-      &Apache::lonxml::error("Unable to insert tag $newtag, $func was not defined.");
+	if (defined(&$func)) {
+	    {
+		no strict 'refs';
+		$result.=&$func();
+	    }
+	} else {
+	    &Apache::lonxml::error("Unable to insert tag $newtag, $func was not defined. ($tagnum)");
+	}
     }
-  }
-  return $result;
+    return $result;
+}
+
+sub insert_img {
+    return '
+    <img />';
 }
 
 sub insert_responseparam {
-  return '
+    return '
     <responseparam />';
 }
 
+sub insert_parameter {
+    return '
+    <parameter />';
+}
+
 sub insert_formularesponse {
-  return '
+    return '
 <formularesponse answer="" samples="">
-    <textline />
+    <responseparam description="Numerical Tolerance" type="tolerance" default="0.00001" name="tol" />
+    <textline size="25"/>
     <hintgroup>
+    <startouttext /><endouttext />
     </hintgroup>
 </formularesponse>';
 }
 
 sub insert_numericalresponse {
-  return '
+    return '
 <numericalresponse answer="">
+<responseparam type="tolerance" default="5%" name="tol" description="Numerical Tolerance" />
+<responseparam name="sig" type="int_range,0-16" default="0,15" description="Significant Figures" />
     <textline />
     <hintgroup>
+    <startouttext /><endouttext />
     </hintgroup>
 </numericalresponse>';
 }
 
+sub insert_customresponse {
+    return '
+<customresponse>
+    <answer type="loncapa/perl">
+    </answer>
+    <textline />
+    <hintgroup>
+    <startouttext /><endouttext />
+    </hintgroup>
+</customresponse>';
+}
+
+sub insert_customresponse_answer {
+    return '
+    <answer type="loncapa/perl">
+    </answer>
+';
+}
+
+sub insert_customhint {
+    return '
+        <customhint>
+            <answer type="loncapa/perl">
+            </answer>
+        </customhint>';
+}
+
+sub insert_customhint_answer {
+    return '
+            <answer type="loncapa/perl">
+            </answer>
+';
+}
+
+sub insert_mathresponse {
+    return '
+<mathresponse>
+    <answer>
+    </answer>
+    <textline />
+    <hintgroup>
+        <startouttext />
+        <endouttext />
+    </hintgroup>
+</mathresponse>';
+}
+
+sub insert_mathresponse_answer {
+    return '
+    <answer>
+    </answer>
+';
+}
+
+sub insert_mathhint {
+    return '
+        <mathhint>
+            <answer>
+            </answer>
+        </mathhint>';
+}
+
+sub insert_mathhint_answer {
+    return '
+            <answer>
+            </answer>
+';
+}
+
 sub insert_stringresponse {
-  return '
+    return '
 <stringresponse answer="" type="">
     <textline />
     <hintgroup>
+    <startouttext /><endouttext />
     </hintgroup>
 </stringresponse>';
 }
 
+sub insert_essayresponse {
+    return '
+<essayresponse>
+    <textfield></textfield>
+</essayresponse>';
+}
+
+sub insert_imageresponse {
+    return '
+<imageresponse max="1">
+    <foilgroup>
+      <foil>
+      </foil>
+    </foilgroup>
+    <hintgroup>
+    <startouttext /><endouttext />
+    </hintgroup>
+</imageresponse>';
+}
+
 sub insert_optionresponse {
-  return '
+    return '
 <optionresponse max="10">
     <foilgroup options="">
+      <foil>
+         <startouttext /><endouttext />
+      </foil>
     </foilgroup>
     <hintgroup>
+    <startouttext /><endouttext />
     </hintgroup>
 </optionresponse>';
 }
 
+sub insert_organicresponse {
+    return '
+<organicresponse>
+    <textline />
+    <hintgroup>
+    <startouttext /><endouttext />
+    </hintgroup>
+</organicresponse>';
+}
+
+sub insert_organicstructure {
+    return '
+<organicstructure />
+';
+}
+
 sub insert_radiobuttonresponse {
-  return '
+    return '
 <radiobuttonresponse max="10">
     <foilgroup>
+      <foil>
+         <startouttext /><endouttext />
+      </foil>
     </foilgroup>
     <hintgroup>
+    <startouttext /><endouttext />
     </hintgroup>
 </radiobuttonresponse>';
 }
 
+sub insert_reactionresponse {
+    return '
+<reactionresponse>
+    <textline />
+    <hintgroup>
+    <startouttext /><endouttext />
+    </hintgroup>
+</reactionresponse>';
+}
+
+sub insert_rankresponse {
+    return '
+<rankresponse max="10">
+    <foilgroup options="">
+      <foil>
+         <startouttext /><endouttext />
+      </foil>
+    </foilgroup>
+    <hintgroup>
+    <startouttext /><endouttext />
+    </hintgroup>
+</rankresponse>';
+}
+
+sub insert_matchresponse {
+    return '
+<matchresponse max="10">
+    <foilgroup options="">
+      <itemgroup>
+      </itemgroup>
+      <foil>
+         <startouttext /><endouttext />
+      </foil>
+    </foilgroup>
+    <hintgroup>
+    <startouttext /><endouttext />
+    </hintgroup>
+</matchresponse>';
+}
+
 sub insert_displayduedate { return '<displayduedate />'; }
 sub insert_displaytitle   { return '<displaytitle />'; }
 sub insert_hintpart {
-  return '
+    return '
 <hintpart on="default">
-    <startouttext/>
-    <endouttext />
+    <startouttext/><endouttext />
 </hintpart>';
 }
 
-sub insert_numericalhint {
+sub insert_hintgroup {
   return '
+<hintgroup>
+    <startouttext /><endouttext />
+</hintgroup>';
+}
+
+sub insert_numericalhint {
+    return '
 <numericalhint>
 </numericalhint>';
 }
 
+sub insert_stringhint {
+    return '
+<stringhint>
+</stringhint>';
+}
+
+sub insert_formulahint {
+    return '
+<formulahint>
+</formulahint>';
+}
+
+sub insert_radiobuttonhint {
+    return '
+<radiobuttonhint>
+</radiobuttonhint>';
+}
+
+sub insert_optionhint {
+    return '
+<optionhint>
+</optionhint>';
+}
+
 sub insert_startouttext {
-  return "<startouttext />\n<endouttext />";
+    return "<startouttext /><endouttext />";
 }
 
 sub insert_script {
-  return "\n<script type=\"loncapa/perl\">\n</script>";
+    return "\n<script type=\"loncapa/perl\"></script>";
+}
+
+sub js_change_detection {
+    my $unsaved=&mt("There are unsaved changes");
+    return (<<SCRIPT);
+<script type="text/javascript">
+var clean = true;
+var is_submit = false;
+var still_ask = false;
+function compareForm(event_) {
+        if (!event_ && window.event) {
+          event_ = window.event;
+        }
+	if ((!is_submit || (is_submit && still_ask)) && !clean) {
+	    still_ask = false;
+	    is_submit = false;
+            event_.returnValue = "$unsaved";
+            return "$unsaved";
+        }
+}
+function unClean() {
+     clean=false;
+}
+window.onbeforeunload = compareForm;
+</script>
+SCRIPT
+}
+
+sub form_change_detection {
+    return ' onsubmit="is_submit=true;" ';
+}
+
+sub element_change_detection {
+    return ' onchange="unClean();" ';
+}
+
+sub submit_ask_anyway {
+    return ' onclick="still_ask=true;" ';
 }
 
 sub textarea_sizes {
-  my ($data)=@_;
-  my $count=0;
-  my $maxlength=-1;
-  foreach (split ("\n", $$data)) { $count++;
+    my ($data)=@_;
+    my $count=0;
+    my $maxlength=-1;
+    foreach (split ("\n", $$data)) {
+	$count+=int(length($_)/79);
+	$count++;
 	if (length($_) > $maxlength) { $maxlength = length($_); }
-      }
-  my $rows = $count;
-  my $cols = $maxlength;
-  return ($rows,$cols);
+    }
+    my $rows = $count;
+    my $cols = $maxlength;
+    return ($rows,$cols);
 }
 
-sub textfield {
+sub editline {
     my ($tag,$data,$description,$size)=@_;
-    if ($description) { $description="<br />".$description."<br />"; }
+    $data=&HTML::Entities::encode($data,'<>&"');
+    if ($description) { $description=$description."<br />"; }
+    my $change_code = &element_change_detection();
     my $result = <<"END";
 $description
 <input type="text" name="homework_edit_$Apache::lonxml::curdepth" 
-       value="$data" size="$size" />
+       value="$data" size="$size" $change_code />
 END
     return $result;
 }
 
 sub editfield {
-  my ($tag,$data,$description,$minwidth,$minheight)=@_;
+    my ($tag,$data,$description,$minwidth,$minheight,$usehtmlarea)=@_;
 
-  my ($rows,$cols)=&textarea_sizes(\$data);
-  if ($cols > 80) { $cols = 80; }
-  if ($cols < $minwidth ) { $cols = $minwidth; }
-  if ($rows < $minheight) { $rows = $minheight; }
-  if ($description) { $description="<br />".$description."<br />"; }
-  return "$description\n&nbsp;&nbsp;&nbsp;<textarea rows=\"$rows\" cols=\"$cols\" name=\"homework_edit_".$Apache::lonxml::curdepth."\">$data</textarea>\n";
+    my ($rows,$cols)=&textarea_sizes(\$data);
+    if (&Apache::lonhtmlcommon::htmlareabrowser() &&
+	!&Apache::lonhtmlcommon::htmlareablocked()) {
+	$rows+=7;      # make room for HTMLarea
+	$minheight+=7; # make room for HTMLarea
+    }
+    if ($cols > 80) { $cols = 80; }
+    if ($cols < $minwidth ) { $cols = $minwidth; }
+    if ($rows < $minheight) { $rows = $minheight; }
+    if ($description) { $description=$description."<br />"; }
+    if ($usehtmlarea) {
+	&Apache::lonhtmlcommon::add_htmlareafields('homework_edit_'.
+						   $Apache::lonxml::curdepth);
+    }
+    # remove typesetting whitespace from between data and the end tag
+    # to make the edit look prettier
+    $data =~ s/\n?[ \t]*$//;
+
+    return $description."\n".'<textarea style="width:100%" rows="'.$rows.
+	'" cols="'.$cols.'" name="homework_edit_'.
+	$Apache::lonxml::curdepth.'" id="homework_edit_'.
+	$Apache::lonxml::curdepth.'" '.&element_change_detection().'>'.
+	&HTML::Entities::encode($data,'<>&"').'</textarea>'.
+	($usehtmlarea?&Apache::lonhtmlcommon::spelllink('lonhomework',
+			 'homework_edit_'.$Apache::lonxml::curdepth):'')."\n";
 }
 
 sub modifiedfield {
-  my ($token) = @_;
-  my $result;
-#  foreach my $envkey (sort keys %ENV) {
-#    &Apache::lonxml::debug("$envkey ---- $ENV{$envkey}");
-#  }
-#  &Apache::lonxml::debug("I want homework_edit_$Apache::lonxml::curdepth");
-#  &Apache::lonxml::debug($ENV{"form.homework_edit_$Apache::lonxml::curdepth"});
-  $result=$ENV{"form.homework_edit_$Apache::lonxml::curdepth"};
-  return $result;
+    my ($endtag,$parser) = @_;
+    my $result;
+    $result=$env{"form.homework_edit_$Apache::lonxml::curdepth"};
+    my $bodytext=&Apache::lonxml::get_all_text($endtag,$parser);
+    # textareas throw away intial \n 
+    if ($bodytext=~/^\n/) {
+	$result="\n".$result;
+    }
+    # if there is typesetting whitespace from between the data and the end tag
+    # restore to keep the source looking pretty
+    if ($bodytext =~ /(\n?[ \t]*)$/) {
+	$result .= $1;
+    }
+    return $result;
 }
 
 # Returns a 1 if the token has been modified and you should rebuild the tag
 # side-effects, will modify the $token if new values are found
 sub get_new_args {
-  my ($token,$parstack,$safeeval,@args)=@_;
-  my $rebuild=0;
-  foreach my $arg (@args) {
-    #just want the string that it was set to
-    my $value=$token->[2]->{$arg};
-    my $newvalue=$ENV{"form.$Apache::lonxml::curdepth.$arg"};
-    &Apache::lonxml::debug(" for:$arg: cur is :$value: new is :$newvalue:");
-    if ($value ne $newvalue) {
-      $token->[2]->{$arg}=$newvalue;
-      $rebuild=1;
+    my ($token,$parstack,$safeeval,@args)=@_;
+    my $rebuild=0;
+    foreach my $arg (@args) {
+	#just want the string that it was set to
+	my $value=$token->[2]->{$arg};
+	my $element=&html_element_name($arg);
+	my $newvalue=$env{"form.$element"};
+	&Apache::lonxml::debug("for:$arg: cur is :$value: new is :$newvalue:");
+	if (defined($newvalue) && $value ne $newvalue) {
+	    if (ref($newvalue) eq 'ARRAY') {
+		$token->[2]->{$arg}=join(',',@$newvalue);
+	    } else {
+		$token->[2]->{$arg}=$newvalue;
+	    }
+	    $rebuild=1;
+	    # add new attributes to the of the attribute seq
+	    if (!grep { $arg eq $_ } (@{ $token->[3] })) {
+		push(@{ $token->[3] },$arg);
+	    }
+	} elsif (!defined($newvalue) && defined($value)) {
+	    delete($token->[2]->{$arg});
+	    $rebuild=1;
+	}
     }
-  }
-  return $rebuild;
+    return $rebuild;
 }
 
 # looks for /> on start tags
 sub rebuild_tag {
-  my ($token) = @_;
-  my $result;
-  if ($token->[0] eq 'S') {
-    $result = '<'.$token->[1];
-    while (my ($key,$val)= each(%{$token->[2]})) {
-      $val=~s:^\s+|\s+$::g;
-      $val=~s:"::g; #"
-      &Apache::lonxml::debug("setting :$key: to  :$val:");
-      $result.=' '.$key.'="'.$val.'"';
+    my ($token) = @_;
+    my $result;
+    if ($token->[0] eq 'S') {
+	$result = '<'.$token->[1];
+	foreach my $attribute (@{ $token->[3] }) {
+	    my $value = $token->[2]{$attribute};
+	    next if ($value eq '');
+	    $value =~s/^\s+|\s+$//g;
+	    $value =~s/\"//g;
+	    &Apache::lonxml::debug("setting :$attribute: to  :$value:");
+	    $result.=' '.$attribute.'="'.$value.'"';
+	}
+	if ($token->[4] =~ m:/>$:) {
+	    $result.=' />';
+	} else {
+	    $result.='>';
+	}
+    } elsif ( $token->[0] eq 'E' ) {
+	$result = '</'.$token->[1].'>';
     }
-    if ($token->[4] =~ m:/>$:) {
-      $result.=' />';
-    } else {
-      $result.='>';
+    return $result;
+}
+
+sub html_element_name {
+    my ($name) = @_;
+    return $name.'_'.$Apache::lonxml::curdepth;
+}
+
+sub hidden_arg {
+    my ($name,$token) = @_;
+    my $result;
+    my $arg=$token->[2]{$name};
+    $result='<input name="'.&html_element_name($name).
+	'" type="hidden" value="'.$arg.'" />';
+    return $result;
+}
+
+sub checked_arg {
+    my ($description,$name,$list,$token) = @_;
+    my $result;
+    my $optionlist="";
+    my $allselected=$token->[2]{$name};
+    $result=&mt($description);
+    foreach my $option (@$list) {
+	my ($value,$text);
+	if ( ref($option) eq 'ARRAY') {
+	    $value='value="'.$$option[0].'"';
+	    $text=$$option[1];
+	    $option=$$option[0];
+	} else {
+	    $text=$option;
+	    $value='value="'.$option.'"';
+	}
+	$result.="<nobr><label><input type='checkbox' $value name='".
+	    &html_element_name($name)."'";
+	foreach my $selected (split(/,/,$allselected)) {
+	    if ( $selected eq $option ) {
+		$result.=" checked='checked' ";
+		last;
+	    }
+	}
+	$result.=&element_change_detection()." />$text</label></nobr>\n";
     }
-  } elsif ( $token->[0] eq 'E' ) {
-    $result = '</'.$token->[1].'>';
-  }
-  return $result;
+    return $result;
 }
 
 sub text_arg {
-  my ($description,$name,$token,$size) = @_;
-  my $result;
-  if (!defined $size) { $size=20; }
-  my $arg=$token->[2]{$name};
-  $result=$description.'<input name="'."$Apache::lonxml::curdepth.$name".
-    '" type="text" value="'.$arg.'" size="'.$size.'" />';
-  return $result;
+    my ($description,$name,$token,$size) = @_;
+    my $result;
+    if (!defined $size) { $size=20; }
+    my $arg=$token->[2]{$name};
+    $result=&mt($description).'&nbsp;<input name="'.&html_element_name($name).
+	'" type="text" value="'.$arg.'" size="'.$size.'" '.
+	&element_change_detection().'/>';
+    return '<nobr>'.$result.'</nobr>';
 }
 
 sub select_arg {
-  my ($description,$name,$list,$token) = @_;
-  my $result;
-  my $optionlist="";
-  my $selected=$token->[2]{$name};
-  foreach my $option (@$list) {
-    if ( $selected eq $option ) {
-      $optionlist.="<option selected=\"on\">$option</option>\n";
-    } else {
-      $optionlist.="<option>$option</option>\n";
+    my ($description,$name,$list,$token) = @_;
+    my $result;
+    my $optionlist="";
+    my $selected=$token->[2]{$name};
+    foreach my $option (@$list) {
+	my ($text,$value);
+	if ( ref($option) eq 'ARRAY') {
+	    $value='value="'.&HTML::Entities::encode($$option[0]).'"';
+	    $text=$$option[1];
+	    $option=$$option[0];
+	} else {
+	    $text=$option;
+	    $value='value="'.&HTML::Entities::encode($option,'\'"&<>').'"';
+	}
+	if ( $selected eq $option ) {
+	    $optionlist.="<option $value selected=\"selected\">$text</option>\n";
+	} else {
+	    $optionlist.="<option $value >$text</option>\n";
+	}
     }
-  }
-  $result.=$description.'<select name="'."$Apache::lonxml::curdepth.$name".'">
+    $result.='<nobr>'.$description.'&nbsp;<select name="'.
+	&html_element_name($name).'" '.&element_change_detection().' >
        '.$optionlist.'
-      </select>';
-  return $result;
+      </select></nobr>';
+    return $result;
 }
 
 sub select_or_text_arg {
-  my ($description,$name,$list,$token,$size) = @_;
-  my $result;
-  my $optionlist="";
-  my $found=0;
-  my $selected=$token->[2]{$name};
-  foreach my $option (@$list) {
-    if ( $selected eq $option ) {
-      $optionlist.="<option selected=\"on\">$option</option>\n";
-      $found=1;
-    } else {
-      $optionlist.="<option>$option</option>\n";
+    my ($description,$name,$list,$token,$size) = @_;
+    my $result;
+    my $optionlist="";
+    my $found=0;
+    my $selected=$token->[2]{$name};
+    foreach my $option (@$list) {
+	my ($text,$value);
+	if ( ref($option) eq 'ARRAY') {
+	    $value='value="'.&HTML::Entities::encode($$option[0]).'"';
+	    $text=$$option[1];
+	    $option=$$option[0];
+	} else {
+	    $text=$option;
+	    $value='value="'.&HTML::Entities::encode($option,'\'"&<>').'"';
+	}
+	if ( $selected eq $option ) {
+	    $optionlist.="<option $value selected=\"selected\">$text</option>\n";
+	    $found=1;
+	} else {
+	    $optionlist.="<option $value>$text</option>\n";
+	}
     }
-  }
-  $optionlist.="<option value=\"TYPEDINVALUE\">Type in value</option>\n";
-  if ($found) {
-    $result.=$description.'<select name="'."$Apache::lonxml::curdepth.$name".'">
-       '.$optionlist.'
-      </select>';
-  } else {
-    $result.=&text_arg($description,$name,$token,$size);
-  }
-  return $result;
+    $optionlist.="<option value=\"TYPEDINVALUE\"".
+ 	((!$found)?' selected="selected"':'').
+ 	">".&mt('Type-in value')."</option>\n";
+#
+    my $change_code=&element_change_detection();
+    my $element=&html_element_name($name);
+    my $selectelement='select_list_'.$element;
+    my $typeinelement='type_in_'.$element;
+    my $typeinvalue=($found?'':$selected);
+#
+    my $hiddenvalue='this.form.'.$element.'.value';
+    my $selectedindex='this.form.'.$selectelement.'.selectedIndex';
+    my $selectedvalue='this.form.'.$selectelement.
+	     '.options['.$selectedindex.'].value';
+    my $typedinvalue='this.form.'.$typeinelement.'.value';
+    my $selecttypeinindex='this.form.'.$selectelement.'.options.length';
+    $description=&mt($description);
+#
+    return (<<ENDSELECTORTYPE);
+<nobr>
+$description
+&nbsp;<select name="$selectelement"
+onChange="if ($selectedvalue!='TYPEDINVALUE') { $hiddenvalue=$selectedvalue; $typedinvalue=''; }" >
+$optionlist
+</select>
+<input type="text" size="$size" name="$typeinelement"
+       value="$typeinvalue" 
+onChange="$hiddenvalue=$typedinvalue;"
+onFocus="$selectedindex=$selecttypeinindex-1;" />
+<input type="hidden" name="$element" value="$selected" $change_code />
+</nobr>
+ENDSELECTORTYPE
+}
+
+#----------------------------------------------------- image coordinates
+# single image coordinates, x, y 
+sub entercoords {
+    my ($idx,$idy,$mode,$width,$height) = @_;
+    unless ($Apache::edit::bgimgsrc) { return ''; }
+    if ($idx) { $idx.='_'; }
+    if ($idy) { $idy.='_'; }
+    my $bgfile=&escape(&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$Apache::edit::bgimgsrc));
+    my $form    = 'lonhomework';
+    my $element;
+    if (! defined($mode) || $mode eq 'attribute') {
+        $element = &escape("$Apache::lonxml::curdepth");
+    } elsif ($mode eq 'textnode') {  # for data between <tag> ... </tag>
+        $element = &escape('homework_edit_'.
+                                           $Apache::lonxml::curdepth);
+    }
+    my $id=$Apache::lonxml::curdepth;
+    my %data=("imagechoice.$id.type"      =>'point',
+	      "imagechoice.$id.formname"  =>$form,
+	      "imagechoice.$id.formx"     =>"$idx$element",
+	      "imagechoice.$id.formy"     =>"$idy$element",
+	      "imagechoice.$id.file"      =>$bgfile,
+	      "imagechoice.$id.formcoord" =>$element);
+    if ($height) {
+	$data{"imagechoice.$id.formheight"}=$height.'_'.
+	    $Apache::edit::bgimgsrccurdepth;
+    }
+    if ($width) {
+	$data{"imagechoice.$id.formwidth"}=$width.'_'.
+	    $Apache::edit::bgimgsrccurdepth;
+    }
+    &Apache::lonnet::appenv(%data);
+    my $text="Click Coordinates";
+    my $result='<a href="/adm/imagechoice?token='.$id.'" target="imagechoice">'.$text.'</a>';
+    return $result;
+}
+
+# coordinates (x1,y1)-(x2,y2)...
+# mode can be either box, or polygon
+sub entercoord {
+    my ($idx,$mode,$width,$height,$type) = @_;
+    unless ($Apache::edit::bgimgsrc) { return ''; }
+    my $bgfile=&escape(&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$Apache::edit::bgimgsrc));
+    my $form    = 'lonhomework';
+    my $element;
+    if (! defined($mode) || $mode eq 'attribute') {
+        $element = &escape("$idx\_$Apache::lonxml::curdepth");
+    } elsif ($mode eq 'textnode') {  # for data between <tag> ... </tag>
+        $element = &escape('homework_edit_'.
+                                           $Apache::lonxml::curdepth);
+    }
+    my $id=$Apache::lonxml::curdepth;
+    my %data=("imagechoice.$id.type"      =>$type,
+	      "imagechoice.$id.formname"  =>$form,
+	      "imagechoice.$id.file"      =>$bgfile,
+	      "imagechoice.$id.formcoord" =>$element);
+    if ($height) {
+	$data{"imagechoice.$id.formheight"}=$height.'_'.
+	    $Apache::edit::bgimgsrccurdepth;
+    }
+    if ($width) {
+	$data{"imagechoice.$id.formwidth"}=$width.'_'.
+	    $Apache::edit::bgimgsrccurdepth;
+    }
+    &Apache::lonnet::appenv(%data);
+    my $text="Enter Coordinates";
+    if ($type eq 'polygon') { $text='Create Polygon Data'; }
+    my $result='<a href="/adm/imagechoice?token='.$id.'" target="imagechoice">'.$text.'</a>';
+    return $result;
+}
+
+sub deletecoorddata {
+    &Apache::lonnet::delenv("imagechoice\\.");
 }
 
 #----------------------------------------------------- browse
 sub browse {
     # insert a link to call up the filesystem browser (lonindexer)
-    $_ = shift;
+    my ($id, $mode, $titleid, $only) = @_;
     my $form    = 'lonhomework';
-    my $element = &Apache::lonnet::escape("$Apache::lonxml::curdepth.$_");
+    my $element;
+    if (! defined($mode) || $mode eq 'attribute') {
+        $element = &escape("$id\_$Apache::lonxml::curdepth");
+    } elsif ($mode eq 'textnode') {  # for data between <tag> ... </tag>
+        $element = &escape('homework_edit_'.
+                                           $Apache::lonxml::curdepth);	
+    }
+    my $titleelement;
+    if ($titleid) {
+	$titleelement=",'$only','','".&escape("$titleid\_$Apache::lonxml::curdepth")."'";
+    } else {
+        $titleelement=",'$only'";
+    }
     my $result = <<"ENDBUTTON";
-<a href=\"javascript:openbrowser('$form','$element')\"\>Browse</a>
+<a href=\"javascript:openbrowser('$form','$element'$titleelement)\"\>Select</a>
 ENDBUTTON
     return $result;
 }
@@ -444,11 +950,21 @@ ENDBUTTON
 #----------------------------------------------------- browse
 sub search {
     # insert a link to call up the filesystem browser (lonindexer)
-    $_ = shift;
+    my ($id, $mode, $titleid) = @_;
     my $form    = 'lonhomework';
-    my $element = &Apache::lonnet::escape("$Apache::lonxml::curdepth.$_");
+    my $element;
+    if (! defined($mode) || $mode eq 'attribute') {
+        $element = &escape("$id\_$Apache::lonxml::curdepth");
+    } elsif ($mode eq 'textnode') {  # for data between <tag> ... </tag>
+        $element = &escape('homework_edit_'.
+                                           $Apache::lonxml::curdepth);
+    }
+    my $titleelement;
+    if ($titleid) {
+	$titleelement=",'".&escape("$titleid\_$Apache::lonxml::curdepth")."'";
+    }
     my $result = <<"ENDBUTTON";
-<a href=\"javascript:opensearcher('$form','$element')\"\>Search</a>
+<a href=\"javascript:opensearcher('$form','$element'$titleelement)\"\>Search</a>
 ENDBUTTON
     return $result;
 }
@@ -563,8 +1079,8 @@ search($elementname) : provide a link wh
 searcher (lonsearchcat) and, once a file is selected, place the result in
 the form element $elementname.
 
-= item *
-textfield(tag,data,description,size): Provide a <input type="text" ../> for
+=item *
+editline(tag,data,description,size): Provide a <input type="text" ../> for
 single-line text entry.  This is to be used for text enclosed by tags, not
 arguements/parameters associated with a tag.
 
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>500 Internal Server Error</title>
</head><body>
<h1>Internal Server Error</h1>
<p>The server encountered an internal error or
misconfiguration and was unable to complete
your request.</p>
<p>Please contact the server administrator at 
 root@localhost to inform them of the time this error occurred,
 and the actions you performed just before this error.</p>
<p>More information about this error may be available
in the server error log.</p>
</body></html>