--- loncom/homework/structuretags.pm	2006/04/20 02:05:30	1.349
+++ loncom/homework/structuretags.pm	2010/06/05 19:36:57	1.469
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: structuretags.pm,v 1.349 2006/04/20 02:05:30 albertel Exp $
+# $Id: structuretags.pm,v 1.469 2010/06/05 19:36:57 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -27,6 +27,29 @@
 #
 ###
 
+=pod
+
+=head1 NAME
+
+Apache::structuretags
+
+=head1 SYNOPSIS
+
+
+This is part of the LearningOnline Network with CAPA project
+described at http://www.lon-capa.org.
+
+
+=head1 NOTABLE SUBROUTINES
+
+=over
+
+=item 
+
+=back
+
+=cut
+
 
 package Apache::structuretags; 
 
@@ -36,17 +59,31 @@ use Apache::File();
 use Apache::lonmenu;
 use Apache::lonlocal;
 use Apache::lonxml;
+use Apache::londefdef;
 use Apache::lonenc();
 use Time::HiRes qw( gettimeofday tv_interval );
+use lib '/home/httpd/lib/perl/';
+use LONCAPA;
+ 
 BEGIN {
-    &Apache::lonxml::register('Apache::structuretags',('block','languageblock','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','problemtype','startouttext','endouttext','simpleeditbutton','definetag'));
+    &Apache::lonxml::register('Apache::structuretags',('block','languageblock','translated','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','problemtype','startpartmarker','startouttext','endpartmarker','endouttext','simpleeditbutton','definetag'));
 }
 
 sub start_web {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-    my $bodytext=&Apache::lonxml::get_all_text("/web",$parser,$style);
-    if ($target eq 'web' || $target eq 'webgrade') {
-	return $bodytext;
+    if ($target ne 'edit' && $target ne 'modified') {
+	my $bodytext=&Apache::lonxml::get_all_text("/web",$parser,$style);
+	if ($target eq 'web' || $target eq 'webgrade') {
+	    return $bodytext;
+	}
+    } elsif ($target eq "edit" ) {
+	my $bodytext = 
+	    &Apache::lonxml::get_all_text_unbalanced("/web",$parser);
+	my $result = &Apache::edit::tag_start($target,$token);
+	$result .= &Apache::edit::editfield($token->[1],$bodytext,'',80,1);
+	return $result;
+    } elsif ( $target eq "modified" ) {
+	return $token->[4].&Apache::edit::modifiedfield("/web",$parser);
     }
     return '';
 }
@@ -58,9 +95,26 @@ sub end_web {
 sub start_tex {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';
-    my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser,$style);
-    if ($target eq 'tex') {
-	return $bodytext.' ';
+    if ($target ne 'edit' && $target ne 'modified') {
+	my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser,$style);
+	if ($target eq 'tex') {
+	    
+	    # If inside a table, occurrences of \\ must be removed;
+	    # else the table blows up.
+
+	    if (&Apache::londefdef::is_inside_of($tagstack, "table")) {
+		$bodytext =~ s/\\\\//g;
+	    }
+	    return $bodytext.'{}';
+	}
+    } elsif ($target eq "edit" ) {
+	my $bodytext = 
+	    &Apache::lonxml::get_all_text_unbalanced("/tex",$parser);
+	my $result = &Apache::edit::tag_start($target,$token);
+	$result .= &Apache::edit::editfield($token->[1],$bodytext,'',80,1);
+	return $result;
+    } elsif ( $target eq "modified" ) {
+	return $token->[4].&Apache::edit::modifiedfield("/tex",$parser);
     }
     return $result;;
 }
@@ -69,6 +123,44 @@ sub end_tex {
     return '';
 }
 
+sub homework_js {
+    return &Apache::loncommon::resize_textarea_js().
+           &setmode_javascript().
+	<<'JS';
+<script type="text/javascript">
+function setSubmittedPart (part) {
+   this.document.lonhomework.submitted.value="part_"+part;
+}
+
+function image_response_click (which, e) {
+    init_geometry();
+    if (!e) { e = window.event; } //IE
+    var input_element = document.lonhomework.elements[which];
+    var token_element = document.lonhomework.elements[which+'_token'];
+    var token = token_element.value;
+    var img_element   = document.getElementById(which+'_imageresponse');
+    var x= e.clientX-getX(img_element)+Geometry.getHorizontalScroll();
+    var y= e.clientY-getY(img_element)+Geometry.getVerticalScroll();
+    var click = x+':'+y;
+    input_element.value = click;
+    img_element.src = '/adm/randomlabel.png?token='+token+'&clickdata='+click;
+}
+
+</script>
+JS
+}
+
+sub setmode_javascript {
+    return <<"ENDSCRIPT";
+<script type="text/javascript">
+function setmode(form,probmode) {
+    form.problemmode.value = probmode;
+    form.submit();
+}
+</script>
+ENDSCRIPT
+}
+
 sub page_start {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$name,
 	$extra_head)=@_;
@@ -79,13 +171,20 @@ sub page_start {
 	}
     }
 
-
     if ($target eq 'tex') {
 	return
 	    &Apache::londefdef::start_html($target,$token,$tagstack,
 					   $parstack,$parser,$safeeval);
     }
 
+    $extra_head .= &homework_js();
+
+    if ($env{'environment.wysiwygeditor'} eq 'on') {
+	$extra_head .= &Apache::lonhtmlcommon::dragmath_js("FCKEditMathPopup");
+    } else {
+        $extra_head .= &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
+    }
+
     my %body_args;
     if (defined($found{'html'})) {
 	$body_args{'skip_phases'}{'head'}=1;
@@ -93,13 +192,9 @@ sub page_start {
 	
 	$extra_head .= &Apache::lonhtmlcommon::spellheader();
 
-	my $css_href = &Apache::lonnet::EXT('resource.0.cssfile');
-	if ($css_href =~ /\S/) {
-	    &Apache::lonxml::extlink($css_href);
-	    $extra_head .= 
-		'<link rel="stylesheet" type="text/css" href="'.$css_href.'" />';
-	}
-	if ($target eq 'edit') {
+	$extra_head .= &Apache::londefdef::generate_css_links();
+
+	if ($env{'request.state'} eq 'construct') {
 	    $extra_head.=&Apache::edit::js_change_detection().
 		"<script type=\"text/javascript\">\n".
 		"if (typeof swmenu != 'undefined') {swmenu.currentURL=null;}\n".
@@ -108,12 +203,28 @@ sub page_start {
 	}
     }
 
+    my $pageheader = '';
     if (defined($found{'body'})) {
 	$body_args{'skip_phases'}{'body'}=1;
     } elsif (!defined($found{'body'}) 
 	     && $env{'request.state'} eq 'construct') {
 	if ($target eq 'web' || $target eq 'edit') {
-	    # no extra args to bodytag
+        # Breadcrumbs for Construction Space
+        &Apache::lonhtmlcommon::clear_breadcrumbs();
+        &Apache::lonhtmlcommon::add_breadcrumb({
+            'text'  => 'Construction Space',
+            'href'  => &Apache::loncommon::authorspace(),
+        });
+        # breadcrumbs (and tools) will be created 
+        # in start_page->bodytag->innerregister
+
+# FIXME Where are we?
+#        &Apache::lonhtmlcommon::add_breadcrumb({
+#            'text'  => 'Problem Editing', # 'Problem Testing'
+#            'href'  => '',
+#        });
+        $pageheader =&Apache::loncommon::head_subbox(
+                &Apache::loncommon::CSTR_pageheader());
 	}
     } elsif (!defined($found{'body'})) {
 	my %add_entries;
@@ -125,71 +236,90 @@ sub page_start {
 
 	my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
 					       $safeeval);
-       	if ($bgcolor eq '' ) { $bgcolor = '#FFFFFF'; }
+        if ($bgcolor eq '' ) { $bgcolor = '#FFFFFF'; }
 
-	$body_args{'bgcolor'}        = $bgcolor;
-	$body_args{'no_title'}       = 1;
-	$body_args{'force_register'} = 1;
-	$body_args{'add_entries'}    = \%add_entries;	
+        $body_args{'bgcolor'}        = $bgcolor;
+        # $body_args{'no_title'}       = 1;
+        $body_args{'force_register'} = 1;
+        $body_args{'add_entries'}    = \%add_entries;
+        if ( $env{'request.state'} eq   'construct') {
+            $body_args{'only_body'}  = 1;
+        }
     }
-
+    $body_args{'no_auto_mt_title'} = 1;
     my $page_start = &Apache::loncommon::start_page($name,$extra_head,
 						    \%body_args);
-
+    $page_start .= $pageheader;
     if (!defined($found{'body'}) 
 	&& $env{'request.state'} ne 'construct'
 	&& ($target eq 'web' || $target eq 'webgrade')) {
 
-	my ($symb,undef,undef,undef,$publicuser)= &Apache::lonxml::whichuser();
-	if ($symb eq '' && !$publicuser) {
-	    my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
-	    $help=&mt("Browsing resource, all submissions are temporary.")."<br />";
-	    $page_start .= $help;
-	}
+	my ($symb,undef,undef,undef,$publicuser)= &Apache::lonnet::whichuser();
+        if ($symb eq '' && !$publicuser) {
+            $page_start .= '<p class="LC_info">'
+                          .&mt('Browsing resource, all submissions are temporary.')
+                          .'</p>';
+        }
     }
 
-    if (!defined($found{'body'})) {
+    if (!defined($found{'body'}) && $env{'request.state'} ne 'construct') {
 	$page_start .= &Apache::lonxml::message_location();
     }
     
     my $form_tag_start;
     if (!defined($found{'form'})) {
 	$form_tag_start='<form name="lonhomework" enctype="multipart/form-data" method="post" action="';
-	my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
+	my $uri = &Apache::loncommon::inhibit_menu_check(
+                &Apache::lonenc::check_encrypt($env{'request.uri'}));
+        $uri = &HTML::Entities::encode($uri,'<>&"');
 	$form_tag_start.=$uri.'" ';
 	if ($target eq 'edit') {
 	    $form_tag_start.=&Apache::edit::form_change_detection();
 	}
-	$form_tag_start.='>';
-    }
+	$form_tag_start.='>'."\n";
 
+	my $symb=&Apache::lonnet::symbread();
+	if ($symb =~ /\S/) {
+	    $symb=
+		&HTML::Entities::encode(&Apache::lonenc::check_encrypt($symb));
+	    $form_tag_start.=
+		"\t".'<input type="hidden" name="symb" value="'.$symb.'" />'."\n";
+	}
+    }
     return ($page_start,$form_tag_start);
 }
 
 #use Time::HiRes();
 sub get_resource_name {
     my ($parstack,$safeeval)=@_;
+    my $name;
     if (defined($Apache::lonhomework::name)) {
-	return $Apache::lonhomework::name;
-    }
-    my ($symb)=&Apache::lonxml::whichuser();
-    my $name=&Apache::lonnet::gettitle($symb);
-    if ($name eq '') {
-	$name=&Apache::lonnet::EXT('resource.title');
-	if ($name eq 'con_lost') { $name = ''; }
-    }
-    if ($name!~/\S+/) {
-	$name=$env{'request.uri'};
-	$name=~s-.*/([^/]+)$-$1-;
+	$name = $Apache::lonhomework::name;
+    } else {
+	my ($symb)=&Apache::lonnet::whichuser();
+	$name=&Apache::lonnet::gettitle($symb);
+	if ($name eq '') {
+	    $name=&Apache::lonnet::EXT('resource.title');
+	    if ($name eq 'con_lost') { $name = ''; }
+	}
+	if ($name!~/\S+/) {
+	    $name=$env{'request.uri'};
+	    $name=~s-.*/([^/]+)$-$1-;
+	}
+	# The name has had html tags escaped:
+       
+	$name=~s/&lt;/</gs;
+	$name=~s/&gt;/>/gs;
+
+	$Apache::lonhomework::name=$name;
     }
-    $Apache::lonhomework::name=$name;
     return $name;
 }
 
 sub setup_rndseed {
     my ($safeeval)=@_;
     my $rndseed;
-    my ($symb)=&Apache::lonxml::whichuser();
+    my ($symb)=&Apache::lonnet::whichuser();
     if ($env{'request.state'} eq "construct" 
 	|| $symb eq '' 
 	|| $Apache::lonhomework::type eq 'practice'
@@ -204,7 +334,8 @@ sub setup_rndseed {
 	    }
 	    $env{'form.rndseed'}=$rndseed;
 	}
-	if ($env{'form.resetdata'} eq &mt('New Problem Variation') ||
+	if ( ($env{'form.resetdata'} eq &mt('New Problem Variation')
+	      && $env{'form.submitted'} eq 'yes')  ||
 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
 	    srand(time);
 	    $rndseed=int(rand(2100000000));
@@ -233,23 +364,44 @@ sub remember_problem_state {
        <input type="hidden" name="problemstatus" value="'.$env{'form.problemstatus'}.'" />';
 }
 
+sub problem_edit_buttons {
+   return  '
+<div class="LC_edit_problem_discards">
+       <input type="button" name="submitmode" accesskey="d" value="'.&mt('Discard Edits and View').'" '.
+       ' onclick="javscript:setmode(this.form,'."'discard'".')"  />
+       <input '.&Apache::edit::submit_ask_anyway('setmode(this.form,'."'editxml'".')').' type="button" name="submitmode" accesskey="x" value="'.&mt('EditXML').'" />
+       <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
+</div>
+<div class="LC_edit_problem_saves">
+       <input type="submit" name="submitbutton" accesskey="s" value="'.&mt('Save and Edit').'" />
+       <input type="submit" name="submitbutton" accesskey="v" value="'.&mt('Save and View').'" />
+</div>';
+}
+
 sub problem_edit_header {
-    return '<input type="hidden" name="submitted" value="edit" />'.
+    return '<input type="hidden" name="submitted" value="edit" /><input type="hidden" name="problemmode" value="edit" />'.
 	&Apache::structuretags::remember_problem_state().'
-       <input type="hidden" name="problemmode" value="'.&mt('Edit').'" />
-       <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
-       <input '.&Apache::edit::submit_ask_anyway().' type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
-       <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" /> <hr />
-       <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes and Edit').'" />
-       <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" /><table><tr><td>'.
-       &Apache::loncommon::help_open_menu('','Problem Editing Help','Problem_Editor_XML_Index','',5,'Authoring',undef,undef,undef,'Problem Editing Help')
-       .'</td></tr></table>'.
-       '<table border="0" width="100%"><tr><td bgcolor="#DDDDDD">';
+<div class="LC_edit_problem_header">
+<div class="LC_edit_problem_header_title">
+'.&mt('Problem Editing').&Apache::loncommon::help_open_menu('Problem Editing','Problem_Editor_XML_Index',5,'Authoring').'
+</div>'.
+&problem_edit_buttons().'
+<hr style="clear:both;" />
+'.&Apache::lonxml::message_location().'
+</div>
+'.
+       '<table border="0" width="100%"><tr><td bgcolor="#F8F8F8">';
 }
 
 sub problem_edit_footer {
-    return '</td></tr></table><br /><input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />
-    <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />'.
+    return '</td></tr></table><br />
+<div class="LC_edit_problem_footer">
+  <hr />'.
+&problem_edit_buttons().'
+  <hr style="clear:both;" />
+</div>
+'.
+
     &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields()).
     "\n</form>\n".&Apache::loncommon::end_page();
 }
@@ -266,31 +418,40 @@ sub option {
 
 sub problem_web_to_edit_header {
     my ($rndseed)=@_;
-    my $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />';
+    my $result .= '<div class="LC_edit_problem_header">';
+
     if (!$Apache::lonhomework::parsing_a_task) {
-	$result .= '<input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />';
+	$result .= 
+	    '<div class="LC_edit_problem_header_title">'.
+	    &mt('Problem Testing').
+	    &Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area').
+	    '</div>';
+    } else {
+	$result .= 
+	    '<div class="LC_edit_problem_header_title">'.
+	    &mt('Task Testing').
+	    '</div>';
     }
-    $result .= '<input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
-             <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
-             <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
-             <nobr><input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
-              <input type="text" name="rndseed" size="10" value="'.
-	       $rndseed.'"
-           onchange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
-             <label><input type="checkbox" name="showallfoils" ';
+    
     my $show_all_foils_text = 
 	($Apache::lonhomework::parsing_a_task) ?
-	&mt('&nbsp;Show&nbsp;All&nbsp;Instances')
-	: &mt('&nbsp;Show&nbsp;All&nbsp;Foils');
+	&mt('Show All Instances')
+	: &mt('Show All Foils');
+
+    my $show_all= '<span class="LC_nobreak"><label for="showallfoils">'
+                 .'<input type="checkbox" name="showallfoils"';
+    if (defined($env{'form.showallfoils'})) { $show_all.=' checked="checked"'; }
+    $show_all.= ' /> '.$show_all_foils_text
+               .'</label></span>';
 
-    if (defined($env{'form.showallfoils'})) { $result.='checked="on"'; }
-    $result.= ' />'.$show_all_foils_text.
-	&Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area','Testing Problems').
-	'</label><hr />';
+
+
+    $result .= '<div class="LC_edit_problem_header_status_row">';
     if (!$Apache::lonhomework::parsing_a_task) {
 	$result.="
-<nobr>
-Problem Status:
+<div class='LC_edit_problem_header_row1'>
+<span class=\"LC_nobreak\">
+".&mt("Problem Status:")."
 <select name='problemstate'>
   <option value=''></option>
   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
@@ -299,50 +460,124 @@ Problem Status:
   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
 </select>
-</nobr>
-<nobr>
-Problem Type:
+</span>
+<span class=\"LC_nobreak\">
+".&mt("Problem Type:")."
 <select name='problemtype'>
   <option value=''></option>
   ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
-  ".&option('problem','problemtype').&mt("Homework problem")."</option>
+  ".&option('problem','problemtype').&mt("Homework Problem")."</option>
   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
+  ".&option('surveycred' ,'problemtype').&mt("Survey Question (with credit)")."</option>
+  ".&option('anonsurvey' ,'problemtype').&mt("Anonymous Survey Question")."</option>
+  ".&option('anonsurveycred' ,'problemtype').&mt("Anonymous Survey Question (with credit)")."</option>
+  ".&option('practice' ,'problemtype').&mt("Practice Problem")."</option>
 </select>
-</nobr>
-<nobr>
-Feedback Mode:
+</span>
+$show_all
+</div>
+<div class='LC_edit_problem_header_row2'>
+<span class=\"LC_nobreak\">
+".&mt("Feedback Mode:")."
 <select name='problemstatus'>
   <option value=''></option>
   ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
-  ".&option('no', 'problemstatus').&mt("Don't Show Feedback")."</option>
+  ".&option('no', 'problemstatus').&mt("Don't Show Incorect/Correct Feedback")."</option>
+  ".&option('no_feedback_ever', 'problemstatus').&mt("Don't Show Any Feedback")."</option>
 </select>
-</nobr>
-<input type='submit' name='changeproblemmode' value='".&mt("Change")."' />
-<hr />";
+</span>
+";
+
+    } elsif ($Apache::lonhomework::parsing_a_task) {
+	$result.="
+<div class='LC_edit_problem_header_row1'>
+<span class=\"LC_nobreak\">
+".&mt("Problem Status:")."
+<select name='problemstate'>
+  <option value=''></option>
+  ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
+  ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
+  ".&option('WEB_GRADE'            ,'problemstate').&mt("Criteria Grading")."</option>
+  ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Feedback")."</option>
+</select>
+</span>
+$show_all
+";
+    }
+    $result.='
+       <span class="LC_nobreak">
+       '.&mt('Apply style file: ').'
+         <input type="text" name="style_file" value="'.&HTML::Entities::encode($env{'construct.style'},'"<>&').'" />
+         <a href="javascript:openbrowser(\'lonhomework\',\'style_file\',\'sty\')">'.&mt('Select').'</a>
+       </span>
+     </div>
+     <div class="LC_edit_problem_header_row1">'.
+       &Apache::lonxml::renderingoptions().'
+     </div>
+     <input type="submit" name="changeproblemmode" value="'.&mt("Change View").'" />
+     <input type="submit" name="clear_style_file" accesskey="d" value="'.&mt('Show Default View').'" />
+     <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
+   </div>
+   <hr />
+   <div class="LC_edit_problem_header_randomize_row">
+     <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
+     <input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
+     <input type="text" name="rndseed" size="10" value="'.
+	       $rndseed.'"
+             onchange="javascript:document.lonhomework.changerandseed.click()" />';
+
+    if (!$Apache::lonhomework::parsing_a_task) {
 	my $numtoanalyze=$env{'form.numtoanalyze'};
 	if (!$numtoanalyze) { $numtoanalyze=20; }
-	$result.= '<input type="submit" name="problemmode" value='.
-	    &mt('"Calculate answers').'" /> for
-             <input type="text" name="numtoanalyze" value="'.
-	     $numtoanalyze.'" size="5" /> '.&mt('versions of this problem').
-	     '.'.&Apache::loncommon::help_open_topic("Analyze_Problem",
-						     '',undef,undef,300).
-						     '<hr />';
-    }
+	$result .= '<span class="LC_nobreak">'.
+	    &mt('[_1] for [_2] versions.',
+		'<input type="button" name="submitmode" value="'.&mt('Calculate answers').'" '.
+                'onclick="javascript:setmode(this.form,'."'calcanswers'".')" />'
+               ,'<input type="text" name="numtoanalyze" value="'.
+		$numtoanalyze.'" size="5" />').
+		&Apache::loncommon::help_open_topic("Analyze_Problem",'',undef,undef,300).
+		'</span>';
+						    
+    }
+
+    $result.='
+   </div>
+   <hr />
+   <div>';
+    $result.='<input type="hidden" name="problemmode" value="view" />';
+    $result .= '<input type="button" name="submitmode" accesskey="e" value="'.&mt('Edit').'" '.
+               'onclick="javascript:setmode(this.form,'."'edit'".')" />';
+    $result .= '<input type="button" name="submitmode" accesskey="x" value="'.&mt('EditXML').'" '.
+               'onclick="javascript:setmode(this.form,'."'editxml'".')" />';
+    $result.='
+   </div>
+   <hr />
+   '.&Apache::lonxml::message_location().'
+</div>';
     return $result;
 }
 
 sub initialize_storage {
-    %Apache::lonhomework::results=();
-    %Apache::lonhomework::history=();
-    my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
+    my ($given_symb) = @_;
+    undef(%Apache::lonhomework::results);
+    undef(%Apache::lonhomework::history);
+    my ($symb,$courseid,$domain,$name) = 
+	&Apache::lonnet::whichuser($given_symb);
+    
+    # anonymous users (CODEd exams) have no data
+    if ($name eq 'anonymous' 
+	&& !defined($domain)) {
+	return;
+    }
+
     if ($env{'request.state'} eq 'construct' 
 	|| $symb eq ''
 	|| $Apache::lonhomework::type eq 'practice') {
 	
 	my $namespace = $symb || $env{'request.uri'};
 	if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
-	    $env{'form.resetdata'} eq &mt('New Problem Variation') ||
+	    ($env{'form.resetdata'} eq &mt('New Problem Variation')
+	     && $env{'form.submitted'} eq 'yes') ||
 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
 	    &Apache::lonnet::tmpreset($namespace,'',$domain,$name);
 	    &Apache::lonxml::debug("Attempt reset");
@@ -355,23 +590,33 @@ sub initialize_storage {
 	%Apache::lonhomework::history=
 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
     }
+
     #ignore error conditions
     my ($temp)=keys %Apache::lonhomework::history ;
     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
 }
 
-# -------------------------------------------------------------finalize_storage
-# Stores away the result has to a student's environment
-# checks form.grade_ for specific values, other wises stores
-# to the running users environment
-# Will increment totals for attempts, students, and corrects
-# if running user has student role.  
+=pod
+
+=item finalize_storage()
+
+	Stores away the result has to a student's environment
+	checks form.grade_ for specific values, other wises stores
+	to the running users environment
+	Will increment totals for attempts, students, and corrects
+	if running user has student role.
+	
+=cut
+
+
 sub finalize_storage {
+    my ($given_symb) = @_;
     my $result;
     if (%Apache::lonhomework::results) {
 	my @remove = grep(/^INTERNAL_/,keys(%Apache::lonhomework::results));
 	delete(@Apache::lonhomework::results{@remove});
-	my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
+	my ($symb,$courseid,$domain,$name) = 
+	    &Apache::lonnet::whichuser($given_symb);
 	if ($env{'request.state'} eq 'construct' 
 	    || $symb eq ''
 	    || $Apache::lonhomework::type eq 'practice') {
@@ -393,12 +638,17 @@ sub finalize_storage {
     }
     return $result;
 }
-use Data::Dumper;
 
-# -------------------------------------------------------------store_aggregates
-# Sends hash of values to be incremented in nohist_resourcetracker.db
-# for the course. Increments total number of attempts, unique students 
-# and corrects for each part for an instance of a problem, as appropriate.
+=pod
+
+item store_aggregates()
+
+	Sends hash of values to be incremented in nohist_resourcetracker.db
+	for the course. Increments total number of attempts, unique students 
+	and corrects for each part for an instance of a problem, as appropriate.
+	
+=cut
+
 sub store_aggregates {
     my ($symb,$courseid) = @_;
     my %aggregate;
@@ -442,13 +692,12 @@ sub checkout_msg {
                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                 'checkout'=>'Check out Exam for Viewing',
 		'checkout?'=>'Check out Exam?');
+    my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
     return (<<ENDCHECKOUT);
 <h2>$lt{'resource'}</h2>
     <p>$lt{'id_expln'}</p>
-<font color="red">
-<p>$lt{'warning'}</p>
-</font>
-<form name="checkout" method="POST" action="$env{'request.uri'}">
+<p class="LC_warning">$lt{'warning'}</p>
+<form name="checkout" method="post" action="$uri">
 <input type="hidden" name="doescheckout" value="yes" />
 <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
 </form>
@@ -457,16 +706,37 @@ ENDCHECKOUT
 
 sub firstaccess_msg {
     my ($time,$symb)=@_;
-    my ($map)=&Apache::lonnet::decode_symb($symb);
-    my $foldertitle=&Apache::lonnet::gettitle($map);
-    &Apache::lonxml::debug("map is $map title is $foldertitle");
-    return (<<ENDCHECKOUT);
-<h2>The resources in "$foldertitle" are open for a limited time. Once you click the 'Show Resource' button below you have $time to complete all resources "$foldertitle".</h2>
-<form name="markaccess" method="POST" action="$env{'request.uri'}">
+    my $result;
+    my @interval=&Apache::lonnet::EXT("resource.0.interval");
+    if ($interval[1] eq 'map') {
+	my ($map)=&Apache::lonnet::decode_symb($symb);
+	my $foldertitle=&Apache::lonnet::gettitle($map);
+    
+	&Apache::lonxml::debug("map is $map title is $foldertitle");
+	$result .= "<h2>".&mt('The resources in "[_1]" are open for a limited time.'
+                             .' Once you click the "Show Resource" button below you have [_2] to complete all resources "[_1]".'
+                             ,$foldertitle,$time)."</h2>";
+    } elsif ($interval[1] eq 'course') {
+	my $course = $env{'course.'.$env{'request.course.id'}.'.description'};
+        $result .= "<h2>".&mt('The resources in "[_1]" are open for a limited time.'
+                             .' Once you click the "Show Resource" button below you have [_2] to complete all resources "[_1]".'
+                             ,$course,$time)."</h2>";
+    } else {
+	my $title=&Apache::lonnet::gettitle($symb);
+        $result .= "<h2>".&mt('This resource "[_1]" is open for a limited time.'
+                             .' Once you click the "Show Resource" button below you have [_2] to complete this resource "[_1]".'
+                             ,$title,$time)."</h2>";
+    }
+    my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
+    my $buttontext = &mt('Show Resource');
+    my $timertext = &mt('Start Timer?');
+    $result .= (<<ENDCHECKOUT);
+<form name="markaccess" method="post" action="$uri">
 <input type="hidden" name="markaccess" value="yes" />
-<input type="button" name="accessbutton" value="Show Resource" onClick="javascript:if (confirm('Start Timer?')) { document.markaccess.submit(); }" />
+<input type="button" name="accessbutton" value="$buttontext" onClick="javascript:if (confirm('$timertext')) { document.markaccess.submit(); }" />
 </form>
 ENDCHECKOUT
+    return $result;
 }
 
 sub init_problem_globals {
@@ -478,19 +748,19 @@ sub init_problem_globals {
     if ($type eq 'problem') {
 	$Apache::inputtags::part='0';
 	@Apache::inputtags::partlist=('0');
-	$Apache::lonhomework::problemstatus=&get_problem_status('0');
+	&Apache::lonhomework::set_show_problem_status(&get_problem_status('0'));
 	$Apache::lonhomework::ignore_response_errors=0;
 
     } elsif ($type eq 'library') {
 	$Apache::inputtags::part='';
 	@Apache::inputtags::partlist=();
-	$Apache::lonhomework::problemstatus='';	
+	&Apache::lonhomework::reset_show_problem_status();
 	$Apache::lonhomework::ignore_response_errors=1;
 
     } elsif ($type eq 'Task') {
 	$Apache::inputtags::part='0';
 	@Apache::inputtags::partlist=('0');
-	$Apache::lonhomework::problemstatus='';	
+	&Apache::lonhomework::reset_show_problem_status();
 	$Apache::lonhomework::ignore_response_errors=1;
     }
     @Apache::inputtags::responselist = ();
@@ -503,7 +773,8 @@ sub init_problem_globals {
     @Apache::structuretags::whileline=();
     $Apache::lonhomework::scantronmode=0;
     undef($Apache::lonhomework::name);
-
+    undef($Apache::lonhomework::default_type);
+    undef($Apache::lonhomework::type);
 }
 
 sub reset_problem_globals {
@@ -515,6 +786,11 @@ sub reset_problem_globals {
 #detect if we try to do 2 problems in one file
 #   undef($Apache::lonhomework::parsing_a_problem);
     undef($Apache::lonhomework::name);
+    undef($Apache::lonhomework::default_type);
+    undef($Apache::lonhomework::type);
+    undef($Apache::lonhomework::scantronmode);
+    undef($Apache::lonhomework::ignore_response_errors);
+    &Apache::lonhomework::reset_show_problem_status();
 }
 
 sub set_problem_state {
@@ -564,15 +840,11 @@ sub start_problem {
 	$Apache::lonhomework::scantronmode=1;
     }
 
-    &initialize_storage();
     if ($target ne 'analyze') {
-	if ($target eq 'web') {
-	    &Apache::lonhomework::showhash(%Apache::lonhomework::history);
-	}
-       	if ($env{'request.state'} eq 'construct') { &set_problem_state('0'); }
-	$Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
+        my $type = &Apache::lonnet::EXT('resource.0.type');
+	$Apache::lonhomework::type=$type;
 	if (($env{'request.state'} eq 'construct') &&
-	    defined($env{'form.problemtype'})) {
+	    $env{'form.problemtype'} =~ /\S/) {
 	    $Apache::lonhomework::type=$env{'form.problemtype'};
 	}
 	&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
@@ -589,6 +861,17 @@ sub start_problem {
     }
     $Apache::lonhomework::default_type = $Apache::lonhomework::type;
 
+    &initialize_storage();
+    if ($target ne 'analyze'
+       	&& $env{'request.state'} eq 'construct') {
+	&set_problem_state('0');
+    }
+
+    if ($target eq 'web') {
+	&Apache::lonxml::debug(" grading history ");
+	&Apache::lonhomework::showhash(%Apache::lonhomework::history);
+    }
+
     #added vars to the scripting enviroment
     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
@@ -597,31 +880,26 @@ sub start_problem {
     my $accessmsg;
 
     my $name= &get_resource_name($parstack,$safeeval);
-    my ($result,$form_tag_start)=
-	&page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
-		    $name);
+    my ($result,$form_tag_start);
+    if ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex'
+	|| $target eq 'edit') {
+	($result,$form_tag_start) =
+	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
+			$name);
+    }
+
     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
 
     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
 	$target eq 'tex') {
-	#handle exam checkout
-	if ($Apache::lonhomework::type eq 'exam') {
-	    my $token=
-		$Apache::lonhomework::history{"resource.0.outtoken"};
-	    if (($env{'form.doescheckout'}) && (!$token)) {
-		$token=&Apache::lonxml::maketoken();
-		$Apache::lonhomework::history{"resource.0.outtoken"}=
-		    $token;
-	    }
-	    $result.=&Apache::lonxml::printtokenheader($target,$token);
-	}
 	if ($env{'form.markaccess'}) {
-	    &Apache::lonnet::set_first_access('map');
+	    my @interval=&Apache::lonnet::EXT("resource.0.interval");
+	    &Apache::lonnet::set_first_access($interval[1]);
 	}
 	#handle rand seed in construction space
 	my $rndseed=&setup_rndseed($safeeval);
-	my ($symb)=&Apache::lonxml::whichuser();
+	my ($symb)=&Apache::lonnet::whichuser();
 	if ($env{'request.state'} ne "construct" && 
 	    ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
@@ -634,14 +912,18 @@ sub start_problem {
                              value="'.$env{'form.username'}.'" />';
 	    }
 	    if ($env{'request.role.adv'}) {
-		$form_tag_start.=
-		    ' <label><input type="checkbox" name="showallfoils" ';
+		$form_tag_start.= ' <label class="LC_nobreak">'
+                         .'<input type="checkbox" name="showallfoils"';
 		if (defined($env{'form.showallfoils'})) {
-		    $form_tag_start.='checked="on"';
+		    $form_tag_start.=' checked="checked"';
 		}
-		$form_tag_start.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
-		    '</label>';
+                $form_tag_start.= ' /> '
+                                 .&mt('Show All Foils')
+                                 .'</label>';
 	    }
+            if ($Apache::lonhomework::type eq 'practice') {
+                $form_tag_start.=&practice_problem_header();
+            }
 	    $form_tag_start.='<hr />';
 	}
 
@@ -667,23 +949,25 @@ sub start_problem {
 		my $msg;
 		if ($status eq 'UNAVAILABLE') {
 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
+                } elsif ($status eq 'NOT_IN_A_SLOT') {
+                    $msg.='<h1>'.&mt('You are not currently signed up to work at this time and/or place.').'</h1>';
 		} elsif ($status ne 'NOT_YET_VIEWED') {
 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
 		}
 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
-		    $msg.='The problem '.$accessmsg;
+		    $msg.=&mt('The problem ').$accessmsg;
 		} elsif ($status eq 'UNCHECKEDOUT') {
 		    $msg.=&checkout_msg();
 		} elsif ($status eq 'NOT_YET_VIEWED') {
 		    $msg.=&firstaccess_msg($accessmsg,$symb);
 		} elsif ($status eq 'NOT_IN_A_SLOT') {
-		    $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work.");
+		    $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work");
 		}
 		$result.=$msg.'<br />';
 	    } elsif ($target eq 'tex') {
 		my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
 		                    : '\begin{minipage}{\textwidth}';
-		$result.='\begin{document}\noindent \vskip 1 mm '.
+		$result.='\noindent \vskip 1 mm '.
 		    $startminipage.'\vskip 0 mm';
 		if ($status eq 'UNAVAILABLE') {
 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
@@ -695,17 +979,30 @@ sub start_problem {
 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
 						       $style);
 	    if ($target eq 'web') {
-		$result .= &Apache::bridgetask::proctor_validation_screen();
+		$result .= 
+		    &Apache::bridgetask::proctor_validation_screen($slot);
 	    } elsif ($target eq 'grade') {
 		&Apache::bridgetask::proctor_check_auth($slot_name,$slot,
 							'problem');
 	    }
 	} elsif ($target eq 'web') {
-	    $result.="\n $form_tag_start".	
+	    if ($status eq 'CAN_ANSWER' 
+		&& $slot_name ne ''
+		&& $Apache::lonhomework::history{'resource.0.checkedin'} eq '') {
+		# unproctored slot access, self checkin
+		&Apache::bridgetask::check_in('problem',undef,undef,
+					      $slot_name);
+	    }
+	    $result.="\n $form_tag_start \t".	
 	      '<input type="hidden" name="submitted" value="yes" />';
 	    # create a page header and exit
 	    if ($env{'request.state'} eq "construct") {
 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
+                if ($Apache::lonhomework::type eq 'practice') {
+                    $result.= '<input type="submit" name="resetdata" '.
+                              'value="'.&mt('New Problem Variation').'" />'.
+                              &practice_problem_header().'<hr />';
+                }
 	    }
 	    # if we are viewing someone else preserve that info
 	    if (defined $env{'form.grade_symb'}) {
@@ -726,7 +1023,6 @@ sub start_problem {
 	$result.=$temp;
     } elsif ($target eq 'modified') {
 	$result=$token->[4];
-	$result.=&Apache::edit::handle_insert();
     } else {
 	# page_start returned a starting result, delete it if we don't need it
 	$result = '';
@@ -744,7 +1040,6 @@ sub end_problem {
     }
 
     if ($target eq 'tex') {
-
 	# Figure out the front matter and replace the
 	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
 	# this in end_problem because whether or not we display due
@@ -773,7 +1068,7 @@ sub end_problem {
 	    $allow_print_points=0;
 	}
 	my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
-	my $begin_doc='\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$env{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent ';
+	my $begin_doc=' \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$env{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent ';
 	my $toc_line='\vskip 1 mm\noindent '.$startminipage.
 	    '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
 	
@@ -783,6 +1078,8 @@ sub end_problem {
 	
 	my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
 	my $duedate = POSIX::strftime("%c",localtime($duetime));
+        my $duedate_text = &mt('Due date: [_1]'
+                              ,&Apache::lonlocal::locallocaltime($duetime));
 	my $temp_file;
 	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
 	
@@ -814,20 +1111,24 @@ sub end_problem {
 	    if (not $env{'request.symb'} =~ m/\.page_/) {
 		if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
 		    $frontmatter .= $begin_doc.
-			'\textit{Due date: '.$duedate.'} '.$toc_line;
+			'\textit{'.$duedate_text.'} '.$toc_line;
 		} else {
 		    $frontmatter.= $begin_doc.$toc_line;
-		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
+		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { 
+			$frontmatter .= '\fbox{\textit{'.$weight.' pt}}';
+		    }
 		}
 	    } else {
-		$frontmatter .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
+		$frontmatter .= '\vskip 1mm\textit{'.$duedate_text.'} \\\\\\\\'.$startminipage;
 	    }
 	} else {
 	    if (not $env{'request.symb'} =~ m/\.page_/) {
 		$frontmatter .= $begin_doc.$toc_line;
-		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
+		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { 
+		    $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';
+		}
 	    } else {
-		$frontmatter .= '\vskip 1mm \\\\\\\\';
+		$frontmatter .= '\vskip 1mm \\\\\\\\'.$startminipage;
 	    }
 	}
 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
@@ -877,7 +1178,7 @@ sub end_problem {
 		    if (not $env{'request.symb'} =~ m/\.page_/) {
 			$result .= $endminipage.'\end{document} ';
 		    } else {
-			$result .= '';
+			$result .= $endminipage;
 		    }
 		}
 	    }
@@ -904,7 +1205,6 @@ sub end_problem {
 	$result .= &problem_edit_footer();
     } elsif ($target eq 'modified') {
 	 $result .= $token->[2];
-	 $result.=&Apache::edit::handle_insertafter($token->[1]);
     }
 
     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
@@ -920,7 +1220,7 @@ sub end_problem {
 sub start_library {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my ($result,$form_tag_start);
-    if ($$tagstack[0] eq 'library') {
+    if ($#$tagstack eq 0 && $$tagstack[0] eq 'library') {
 	&init_problem_globals('library');
 	$Apache::lonhomework::type='problem';
     }
@@ -933,9 +1233,8 @@ sub start_library {
 	$result.=$temp;
     } elsif ($target eq 'modified') {
 	$result=$token->[4];
-	$result.=&Apache::edit::handle_insert();
     } elsif (($target eq 'web' || $target eq 'webgrade')
-	     && $$tagstack[0] eq 'library' 
+	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library')
 	     && $env{'request.state'} eq "construct" ) {
 	my $name=&get_resource_name($parstack,$safeeval);
 	($result,$form_tag_start)=
@@ -945,6 +1244,11 @@ sub start_library {
 	$result.=" \n $form_tag_start".	
 		  '<input type="hidden" name="submitted" value="yes" />';
 	$result.=&problem_web_to_edit_header($rndseed);
+        if ($Apache::lonhomework::type eq 'practice') {
+            $result.= '<input type="submit" name="resetdata" '.
+                      'value="'.&mt('New Problem Variation').'" />'.
+                      &practice_problem_header().'<hr />';
+        }
     }
     return $result;
 }
@@ -954,11 +1258,14 @@ sub end_library {
     my $result='';
     if ($target eq 'edit') {
 	$result=&problem_edit_footer();
-    } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
-	     $env{'request.state'} eq "construct") {
+    } elsif ($target eq 'web' 
+	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library') 
+	     && $env{'request.state'} eq "construct") {
 	$result.='</form>'.&Apache::loncommon::end_page({'discussion' => 1});
     }
-    if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };
+    if ( $#$tagstack eq 0 && $$tagstack[0] eq 'library') {
+	&reset_problem_globals('library');
+    }
     return $result;
 }
 
@@ -969,16 +1276,19 @@ sub start_definetag {
 
     my $name = $token->[2]->{'name'};
     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser,$style);
-    if ($name=~/^\//) {
-	$result=
- '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
-    } else {
-	$result=
- '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
+    if ($target eq 'web') {
+	if ($name=~/^\//) {
+	    $result=
+		'<br /><table class="LC_sty_end"><tr><th>'.
+		&mt('END [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
+	} else {
+	    $result=
+		'<br /><table class="LC_sty_begin"><tr><th>'.
+		&mt('BEGIN [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
+	}
+	$skip = &HTML::Entities::encode($skip, '<>&"');
+	$result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
     }
-    $skip=~s/\</\&lt\;/gs;
-    $skip=~s/\>/\&gt\;/gs;
-    $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
     return $result;
 }
 
@@ -994,7 +1304,7 @@ sub start_block {
     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer'  ||
 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
 	my $code = $token->[2]->{'condition'};
-	if (defined($code)) {
+	if (defined($code) && $code ne '') {
 	    if (!$Apache::lonxml::default_homework_loaded) {
 		&Apache::lonxml::default_homework_load($safeeval);
 	    }
@@ -1039,19 +1349,38 @@ sub start_languageblock {
 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
 	my $include = $token->[2]->{'include'};
 	my $exclude = $token->[2]->{'exclude'};
-        my %languages=&Apache::loncommon::display_languages();
-        $result='1';
-	if ($include) {
-            $result='';
-            foreach (split(/\,/,$include)) {
-                if ($languages{$_}) { $result='1'; }
-            }
-	}
-        if ($exclude) {
-            foreach (split(/\,/,$exclude)) {
-                if ($languages{$_}) { $result='0'; }
-            }
-	}
+        my @preferred_languages=&Apache::lonlocal::preferred_languages();
+# This should not even happen, since we should at least have the server language
+        if (!$preferred_languages[0]) { $preferred_languages[0]='en'; }
+# Now loop over all languages in order of preference
+        foreach my $preferred_language (@preferred_languages) {
+# If the languageblock has no arguments, show the contents
+           $result=1;
+           my $found=0;
+# Do we have an include argument?
+	   if ($include) {
+# If include is specified, by default, don't render the block
+              $result=0;
+              foreach my $included_language (split(/\,/,$include)) {
+# ... but if my preferred language is included, render it
+                 if ($included_language eq $preferred_language) {
+                    $result=1; 
+                    $found=1; 
+                 }
+              }
+	   }
+# Do we have an exclude argument?
+           if ($exclude) {
+              $result=1;
+              foreach my $excluded_language (split(/\,/,$exclude)) {
+                 if ($excluded_language eq $preferred_language) {
+                    $result=0;
+                    $found=1;
+                 }
+              }
+	   }
+           if ($found) { last; }
+        }
 	if ( ! $result ) {
 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
 						   $style);
@@ -1083,6 +1412,66 @@ sub end_languageblock {
     return $result;
 }
 
+{
+    my %available_texts;
+    sub start_translated {
+	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+	&Apache::lonxml::register('Apache::structuretags',('lang'));
+	undef(%available_texts);
+    }
+    
+    sub end_translated {
+	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+	my $result;
+	#show the translation on viewable targets
+	if ($target eq 'web'     || $target eq 'tex' || $target eq 'webgrade'||
+	    # or non-viewable targets, if it's embedded in something that
+	    # wants the output
+	    (($target eq 'answer' || $target eq 'analyze'|| $target eq 'grade')
+	     && &Apache::lonxml::in_redirection() ) ) {
+	    my @possibilities = keys(%available_texts);
+	    my $which = 
+		&Apache::loncommon::languages(\@possibilities) || 'default';
+	    $result = $available_texts{$which};
+	}
+	undef(%available_texts);
+	&Apache::lonxml::deregister('Apache::structuretags',('lang'));
+	return $result;
+    }
+
+
+    sub start_lang {
+	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
+	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
+	    &Apache::lonxml::startredirection();
+	}
+	return '';
+    }
+
+    sub end_lang {
+	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
+	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
+	    my $result = &Apache::lonxml::endredirection();
+	    my $which = &Apache::lonxml::get_param('which',$parstack,
+						   $safeeval);
+            if ($which=~/\w/) {
+                $available_texts{$which} = $result;
+            }
+            my $otherlangs = &Apache::lonxml::get_param('other',$parstack,
+                                                        $safeeval);
+            foreach my $language (split(/\s*\,\s*/,$otherlangs)) {
+                if ($language=~/\w/) {
+                    $available_texts{$language} = $result;
+                }
+            }
+
+	}
+	return '';
+    }
+}
+
 sub start_instructorcomment {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
 
@@ -1090,7 +1479,7 @@ sub start_instructorcomment {
 
     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
-        $result=($env{'request.role'}=~/^(in|cc|au|ca|li)/);
+        $result=($env{'request.role'}=~/^(in|cc|co|au|ca|li)/);
 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
 						   $parser,$style);
@@ -1161,13 +1550,20 @@ sub end_while {
 	while ($return) {
 	    if (time-$starttime >
 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
-		#$return = 0; $error=1; next;
+		$return = 0; $error=1; next;
 	    }
 	    $result.=&Apache::scripttag::xmlparse($bodytext);
+	    if ($target eq 'grade' || $target eq 'answer' ||
+		$target eq 'analyze') {
+		# grade/answer/analyze should produce no output but if we
+		# are redirecting, the redirecter should know what to do
+		# with the output
+		if (!$Apache::lonxml::redirection) { undef($result); }
+	    }
 	    $return = &Apache::run::run($code,$safeeval);
 	}
 	if ($error) {
-	    &Apache::lonxml::error('<pre>'.&mt('Code ran too long. It ran for more than').' '.$Apache::lonnet::perlvar{'lonScriptTimeout'}.' '.&mt('seconds occured while running &lt;while&gt; on line').' '.$line.'</pre>');
+	    &Apache::lonxml::error('<pre>'.&mt('Code ran too long. It ran for more than').' '.$Apache::lonnet::perlvar{'lonScriptTimeout'}.' '.&mt('seconds occurred while running &lt;while&gt; on line').' '.$line.'</pre>');
 	}
     } elsif ($target eq "edit") {
 	$result.= &Apache::edit::tag_end($target,$token,'');
@@ -1221,6 +1617,20 @@ sub start_randomlist {
 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
 	    $showarg--;
 	    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
+            if (($target eq 'analyze') && ($env{'form.check_parts_withrandomlist'})) {
+                my @currlist;
+                my $part = $Apache::inputtags::part;
+                if ($part ne '') {
+                    if (ref($Apache::lonhomework::analyze{'parts_withrandomlist'}) eq 'ARRAY') {
+                        my @currlist = @{$Apache::lonhomework::analyze{'parts_withrandomlist'}};
+                        if (!(grep(/^\Q$part\E$/,@currlist))) {
+                            push(@{$Apache::lonhomework::analyze{'parts_withrandomlist'}},$part);
+                        }
+                    } else {
+                        push(@{$Apache::lonhomework::analyze{'parts_withrandomlist'}},$part);
+                    }
+                }
+            }
 	    for(0 .. $show) {
 		$bodytext .= "$randomlist[ $idx_arr[$_] ]";
 	    }
@@ -1274,6 +1684,49 @@ sub ordered_show_check {
     return $in_order_show;
 }
 
+
+sub start_startpartmarker {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $result='';
+    if ($target eq 'edit') {
+        $result=&Apache::edit::tag_start($target,$token);
+        $result.=&mt('Marker for the start of a part. Place end marker below to wrap in-between tags into a new part.').'</td></tr>';
+        $result.=&Apache::edit::end_table();
+
+    } 
+    return $result;
+}
+
+sub end_startpartmarker {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my @result;
+    if ($target eq 'edit') { $result[1]='no'; }
+    return @result;
+}
+
+sub start_endpartmarker {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $result='';
+    if ($target eq 'edit') {
+        $result=&Apache::edit::tag_start($target,$token);
+        $result.=&mt('Marker for the end of a part. Place start marker above to wrap in-between tags into a new part.').'</td></tr>';
+        $result.=&Apache::edit::end_table();
+
+    }
+    return $result;
+}
+
+sub end_endpartmarker {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my @result;
+    if ($target eq 'edit') { $result[1]='no'; }
+    return @result;
+}
+
+
+
+
+
 sub start_part {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     if (!$Apache::lonxml::metamode) {
@@ -1281,14 +1734,15 @@ sub start_part {
 	                                     # duedates.
     }
     my $result='';
-    my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
-    if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
+    my $id= &Apache::lonxml::get_id($parstack,$safeeval);
     $Apache::inputtags::part=$id;
     push(@Apache::inputtags::partlist,$id);
     @Apache::inputtags::response=();
     @Apache::inputtags::previous=();
     @Apache::inputtags::previous_version=();
-    $Apache::lonhomework::problemstatus=&get_problem_status($id);
+    &Apache::lonhomework::set_show_problem_status(&get_problem_status($id));
+    &Apache::response::reset_params();
+
     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
     if ($newtype) { $Apache::lonhomework::type=$newtype; }
@@ -1335,7 +1789,7 @@ sub start_part {
 		if ($target eq 'tex') {
 		    if (not $env{'form.problem_split'}=~/yes/) {
 			if ($$tagstack[-2] eq 'td') {
-			    $result.='\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
+			    $result.='\noindent \begin{minipage}{\textwidth}\noindent';
 			} else {
 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
 			}
@@ -1357,9 +1811,12 @@ sub start_part {
 				    '.disableexampointprint'}) eq 'yes') {
 			$allow_print_points=0;
 		    }
-		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
+		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { 
+			$result .= '\vskip 10mm\fbox{\textit{'.$weight.' pt}}';
+
+		    }
 		} elsif ($target eq 'web') {
-		    $result.='<a name="'.&Apache::lonnet::escape($Apache::inputtags::part).'" />';
+		    $result.='<a name="'.&escape($Apache::inputtags::part).'" />';
 		}
 	    }
 	}
@@ -1377,7 +1834,6 @@ sub start_part {
 	    #limiting ids to only letters numbers, and space
 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
 	    $result = &Apache::edit::rebuild_tag($token);
-	    $result.=&Apache::edit::handle_insert();
 	}
     }
     return $result;
@@ -1415,7 +1871,6 @@ sub end_part {
 	$result.=&Apache::edit::end_table();
     } elsif ($target eq 'modified') {
 	 $result .= $token->[2];
-	 $result.=&Apache::edit::handle_insertafter($token->[1]);
     }
     pop @Apache::inputtags::status;
     $Apache::inputtags::part='';
@@ -1442,15 +1897,21 @@ sub end_preduedate {
     return '';
 }
 
+# In all the modes where <postanswerdate> text is 
+# displayable,  all we do is eat up the text between the start/stop
+# tags if the conditions are not right to display it.
 sub start_postanswerdate {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-    if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade') {
+    my $pav = &Apache::lonnet::allowed('pav', $env{'request.course.id'}) ||
+	&Apache::lonnet::allowed('pav',
+			   $env{'request.course.id'}.'/'.$env{'request.course.sec'});
+    if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade' ||
+	$target eq 'tex' ) {
 	if ($Apache::lonhomework::scantronmode ||
-	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
+	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER' ||
+	    (($target eq 'tex') && !$pav)) {
 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
 	}
-    } elsif ($target eq 'tex') {
-	&Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
     }
     return '';
 }
@@ -1522,7 +1983,11 @@ sub start_problemtype {
 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
 					     [ ['exam','Exam/Quiz Problem'],
 					       ['survey','Survey'],
-					       ['problem','Homework Problem'] ]
+                                               ['surveycred','Survey (with credit)'],
+                                               ['anonsurvey','Anonymous Survey'],
+                                               ['anonsurveycred','Anonymous Survey (with credit)'],
+					       ['problem','Homework Problem'],
+                                               ['practice','Practice Problem'] ]
 					     ,$token);
 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
     } elsif ($target eq 'modified') {
@@ -1541,6 +2006,13 @@ sub start_startouttext {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my @result=(''.'');
     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
+    
+    my $nesting = 
+	&Apache::lonxml::set_state('outtext',
+				   &Apache::lonxml::get_state('outtext')+1);
+    if ($nesting > 1 && $env{'request.state'} eq 'construct') {
+	&Apache::lonxml::error("Nesting of &lt;startouttext /&gt; not allowed, on line ".$token->[5]);
+    }
     return (@result);
 }
 
@@ -1548,18 +2020,25 @@ sub end_startouttext {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';
     my $text='';
-
     if ($target eq 'edit') {
+	my $areaid = 'homework_edit_'.$Apache::lonxml::curdepth;
 	$text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
-	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
-<td>".&mt('Delete:').
-                 &Apache::edit::deletelist($target,$token)
-		 ."</td>
-<td>".
-                 &Apache::edit::insertlist($target,$token).
+	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>"
+                 .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
+                 .&Apache::edit::deletelist($target,$token)
+                 .'</span></td>';
+        unless ($env{'environment.wysiwygeditor'} eq 'on') {
+	    $result .= '<td align="left">'
+		.&Apache::lonhtmlcommon::dragmath_button($areaid,1)
+		.'</td>'
+		.'<td>'
+		.&Apache::edit::insertlist($target,$token)
+		.'</td>';
+	}
+	$result.='<td align="right" valign="top">' .
+	    &Apache::loncommon::helpLatexCheatsheet().
 		 &Apache::edit::end_row().
-                 &Apache::edit::start_spanning_row()."\n"
-		 . &Apache::loncommon::helpLatexCheatsheet () .
+                 &Apache::edit::start_spanning_row()."\n".
 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
     }
     if ($target eq 'modified') {
@@ -1577,7 +2056,16 @@ sub start_endouttext {
     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
     if ($target eq "modified") {
 	$result='<endouttext />'.
-	    &Apache::edit::handle_insertafter('startouttext'); }
+	    &Apache::edit::handle_insertafter('startouttext');
+    }
+
+    my $nesting = 
+	&Apache::lonxml::set_state('outtext',
+				   &Apache::lonxml::get_state('outtext')-1);
+    if ($nesting < 0 && $env{'request.state'} eq 'construct') {
+	&Apache::lonxml::error(" Extraneous &lt;endouttext /&gt; not allowed on line ".$token->[5]);
+	&Apache::lonxml::set_state('outtext', 0);
+    }
     return $result;
 }
 
@@ -1610,10 +2098,18 @@ sub start_simpleeditbutton {
         (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
         my $url=$env{'request.noversionuri'};
         $url=~s/\?.*$//;
-	my ($symb) = &Apache::lonxml::whichuser();
-	$result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
-                '<a href="'.$url.'/smpedit?symb='.&Apache::lonnet::escape($symb).'">'.&mt('Edit').'</a> - '.&mt('Note: it can take up to 10 minutes for changes to take effect for all users.').
-&Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
+	my ($symb) = &Apache::lonnet::whichuser();
+#       Warning makes more sense and is more important on edit screen
+#       $result='<p class="LC_warning">'
+#              .&mt('Note: it can take up to 10 minutes for changes to take effect for all users.')
+#              .&Apache::loncommon::help_open_topic('Caching')
+#              .'</p>';
+        $result.=&Apache::lonhtmlcommon::start_funclist()
+                .&Apache::lonhtmlcommon::add_item_funclist(
+                     '<a href="'.$url.'/smpedit?symb='.&escape($symb).'">'
+                    .&mt('Edit').'</a>')
+                .&Apache::lonhtmlcommon::end_funclist();
+
     }
     return $result;
 }
@@ -1622,5 +2118,17 @@ sub end_simpleeditbutton {
     return '';
 }
 
+sub practice_problem_header {
+    return '<span class="LC_info"><h3>'.&mt('Practice Problem').'</h3></span>'.
+           '<span class="LC_info">'.&mt('Submissions are not permanently recorded').
+           '</span>';
+}
+
 1;
 __END__
+
+=pod
+
+=back
+
+=cut