--- loncom/homework/structuretags.pm	2006/06/26 22:33:22	1.359
+++ loncom/homework/structuretags.pm	2007/10/31 17:40:01	1.409
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: structuretags.pm,v 1.359 2006/06/26 22:33:22 albertel Exp $
+# $Id: structuretags.pm,v 1.409 2007/10/31 17:40:01 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -42,14 +42,24 @@ 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','startouttext','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 '';
 }
@@ -61,9 +71,19 @@ 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') {
+	    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;;
 }
@@ -72,6 +92,31 @@ sub end_tex {
     return '';
 }
 
+sub homework_js {
+    return &Apache::loncommon::resize_textarea_js().
+	<<'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 page_start {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$name,
 	$extra_head)=@_;
@@ -88,6 +133,8 @@ sub page_start {
 					   $parstack,$parser,$safeeval);
     }
 
+    $extra_head .= &homework_js();
+
     my %body_args;
     if (defined($found{'html'})) {
 	$body_args{'skip_phases'}{'head'}=1;
@@ -95,13 +142,9 @@ 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') {
 	    $extra_head.=&Apache::edit::js_change_detection().
 		"<script type=\"text/javascript\">\n".
 		"if (typeof swmenu != 'undefined') {swmenu.currentURL=null;}\n".
@@ -115,7 +158,9 @@ sub page_start {
     } elsif (!defined($found{'body'}) 
 	     && $env{'request.state'} eq 'construct') {
 	if ($target eq 'web' || $target eq 'edit') {
-	    # no extra args to bodytag
+	    if ($env{'environment.remote'} ne 'off') {
+		$body_args{'only_body'}  = 1;
+	    }
 	}
     } elsif (!defined($found{'body'})) {
 	my %add_entries;
@@ -133,8 +178,12 @@ sub page_start {
 	$body_args{'no_title'}       = 1;
 	$body_args{'force_register'} = 1;
 	$body_args{'add_entries'}    = \%add_entries;	
+	if ($env{'environment.remote'} eq 'off'
+	    && $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);
 
@@ -142,7 +191,7 @@ sub page_start {
 	&& $env{'request.state'} ne 'construct'
 	&& ($target eq 'web' || $target eq 'webgrade')) {
 
-	my ($symb,undef,undef,undef,$publicuser)= &Apache::lonxml::whichuser();
+	my ($symb,undef,undef,undef,$publicuser)= &Apache::lonnet::whichuser();
 	if ($symb eq '' && !$publicuser) {
 	    my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
 	    $help=&mt("Browsing resource, all submissions are temporary.")."<br />";
@@ -150,7 +199,7 @@ sub page_start {
 	}
     }
 
-    if (!defined($found{'body'})) {
+    if (!defined($found{'body'}) && $env{'request.state'} ne 'construct') {
 	$page_start .= &Apache::lonxml::message_location();
     }
     
@@ -162,14 +211,14 @@ sub page_start {
 	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));
 	    $form_tag_start.=
-		'<input type="hidden" name="symb" value="'.$symb.'" />';
+		"\t".'<input type="hidden" name="symb" value="'.$symb.'" />'."\n";
 	}
     }
     return ($page_start,$form_tag_start);
@@ -178,27 +227,34 @@ sub page_start {
 #use Time::HiRes();
 sub get_resource_name {
     my ($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'
@@ -213,7 +269,8 @@ 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));
@@ -245,14 +302,24 @@ sub remember_problem_state {
 sub problem_edit_header {
     return '<input type="hidden" name="submitted" value="edit" />'.
 	&Apache::structuretags::remember_problem_state().'
+<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>
+<div class="LC_edit_problem_discards">
        <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>'.
+       <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
+</div>
+<div class="LC_edit_problem_saves">
+       <input type="submit" name="submit" accesskey="s" value="'.&mt('Save and Edit').'" />
+       <input type="submit" name="submit" accesskey="v" value="'.&mt('Save and View').'" />
+  </div>
+<hr class="LC_edit_problem_divide" />
+'.&Apache::lonxml::message_location().'
+</div>
+'.
        '<table border="0" width="100%"><tr><td bgcolor="#DDDDDD">';
 }
 
@@ -275,31 +342,38 @@ 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');
 
-    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 />';
+    my $show_all= '<span class="LC_nobreak"><label><input type="checkbox" name="showallfoils" ';
+    if (defined($env{'form.showallfoils'})) { $show_all.='checked="checked"'; }
+    $show_all.= ' />'.$show_all_foils_text.'</label></span>';
+
+
+
+    $result .= '<div class="LC_edit_problem_header_status_row">';
     if (!$Apache::lonhomework::parsing_a_task) {
 	$result.="
-<nobr>
-Problem Status:
+<div class='LC_edit_problem_header_row1'>
+<span class=\"LC_nobreak\">
+".&mt("Problem Status:")."
 <select name='problemstate'>
   <option value=''></option>
   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
@@ -308,36 +382,89 @@ Problem Status:
   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
 </select>
-</nobr>
-<nobr>
-Problem Type:
+</span>
+<span class=\"LC_nobreak\">
+".&mt("Problem Type:")."
 <select name='problemtype'>
   <option value=''></option>
   ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
   ".&option('problem','problemtype').&mt("Homework problem")."</option>
   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
 </select>
-</nobr>
-<nobr>
-Feedback Mode:
+</span>
+$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>
+</span>
+";
+
+    } elsif ($Apache::lonhomework::parsing_a_task) {
+	$result.="
+<div class='LC_edit_problem_header_row1'>
+<span class=\"LC_nobreak\">
+".&mt("Problem Status:")."
+<select name='problemstate'>
+  <option value=''></option>
+  ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
+  ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
+  ".&option('WEB_GRADE'            ,'problemstate').&mt("Criteria Grading")."</option>
+  ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Feedback")."</option>
 </select>
-</nobr>
-<input type='submit' name='changeproblemmode' value='".&mt("Change")."' />
-<hr />";
+</span>
+$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>
+     <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 class="LC_edit_problem_divide" />
+   <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="submit" name="problemmode" value='.&mt('"Calculate answers').'" />',
+		'<input type="text" name="numtoanalyze" value="'.
+		$numtoanalyze.'" size="5" />').
+		&Apache::loncommon::help_open_topic("Analyze_Problem",'',undef,undef,300).
+		'</span>';
+						    
+    }
+
+    $result.='
+   </div>
+   <div class="LC_edit_problem_header_edit_row">';
+    $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />';
+    $result .= '<input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />';
+    $result .= '<input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />';
+    $result.='
+   </div>
+   '.&Apache::lonxml::message_location().'
+</div>';
     return $result;
 }
 
@@ -346,7 +473,7 @@ sub initialize_storage {
     undef(%Apache::lonhomework::results);
     undef(%Apache::lonhomework::history);
     my ($symb,$courseid,$domain,$name) = 
-	&Apache::lonxml::whichuser($given_symb);
+	&Apache::lonnet::whichuser($given_symb);
     
     # anonymous users (CODEd exams) have no data
     if ($name eq 'anonymous' 
@@ -360,7 +487,8 @@ sub initialize_storage {
 	
 	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");
@@ -392,7 +520,7 @@ sub finalize_storage {
 	my @remove = grep(/^INTERNAL_/,keys(%Apache::lonhomework::results));
 	delete(@Apache::lonhomework::results{@remove});
 	my ($symb,$courseid,$domain,$name) = 
-	    &Apache::lonxml::whichuser($given_symb);
+	    &Apache::lonnet::whichuser($given_symb);
 	if ($env{'request.state'} eq 'construct' 
 	    || $symb eq ''
 	    || $Apache::lonhomework::type eq 'practice') {
@@ -414,7 +542,6 @@ sub finalize_storage {
     }
     return $result;
 }
-use Data::Dumper;
 
 # -------------------------------------------------------------store_aggregates
 # Sends hash of values to be incremented in nohist_resourcetracker.db
@@ -501,19 +628,19 @@ 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();
 	$Apache::lonhomework::ignore_response_errors=1;
     }
     @Apache::inputtags::responselist = ();
@@ -528,7 +655,6 @@ sub init_problem_globals {
     undef($Apache::lonhomework::name);
     undef($Apache::lonhomework::default_type);
     undef($Apache::lonhomework::type);
-    undef($Apache::lonhomework::problemstatus);
 }
 
 sub reset_problem_globals {
@@ -543,8 +669,8 @@ sub reset_problem_globals {
     undef($Apache::lonhomework::default_type);
     undef($Apache::lonhomework::type);
     undef($Apache::lonhomework::scantronmode);
-    undef($Apache::lonhomework::problemstatus);
     undef($Apache::lonhomework::ignore_response_errors);
+    &Apache::lonhomework::reset_show_problem_status();
 }
 
 sub set_problem_state {
@@ -594,12 +720,7 @@ 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'); }
 	$Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
 	if (($env{'request.state'} eq 'construct') &&
 	    defined($env{'form.problemtype'})) {
@@ -619,6 +740,17 @@ 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.'\';';
@@ -656,7 +788,7 @@ sub start_problem {
 	}
 	#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="'.
@@ -706,7 +838,7 @@ sub start_problem {
 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
 		}
 		if ($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') {
@@ -730,13 +862,21 @@ 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") {
@@ -761,7 +901,6 @@ 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 = '';
@@ -779,7 +918,6 @@ sub end_problem {
     }
 
     if ($target eq 'tex') {
-
 	# Figure out the front matter and replace the
 	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
 	# this in end_problem because whether or not we display due
@@ -855,14 +993,14 @@ sub end_problem {
 		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
 		}
 	    } else {
-		$frontmatter .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
+		$frontmatter .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\'.$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}}';}
 	    } else {
-		$frontmatter .= '\vskip 1mm \\\\\\\\';
+		$frontmatter .= '\vskip 1mm \\\\\\\\'.$startminipage;
 	    }
 	}
 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
@@ -912,7 +1050,7 @@ sub end_problem {
 		    if (not $env{'request.symb'} =~ m/\.page_/) {
 			$result .= $endminipage.'\end{document} ';
 		    } else {
-			$result .= '';
+			$result .= $endminipage;
 		    }
 		}
 	    }
@@ -939,7 +1077,6 @@ 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' && $target eq 'web') {
@@ -955,7 +1092,7 @@ sub end_problem {
 sub start_library {
     my ($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';
     }
@@ -968,9 +1105,8 @@ 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)=
@@ -989,11 +1125,14 @@ 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;
 }
 
@@ -1004,16 +1143,19 @@ 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;
 }
 
@@ -1029,7 +1171,7 @@ 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);
 	    }
@@ -1074,19 +1216,38 @@ 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{$_}) { $result='0'; }
-            }
-	}
+        my @preferred_languages=&Apache::loncommon::preferred_languages();
+# This should not even happen, since we should at least have the server language
+        if (!$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);
@@ -1118,6 +1279,56 @@ 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);
+	    $available_texts{$which} = $result;
+	}
+	return '';
+    }
+}
+
 sub start_instructorcomment {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
 
@@ -1196,9 +1407,16 @@ 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) {
@@ -1316,14 +1534,15 @@ 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; }
@@ -1370,7 +1589,7 @@ 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';
 			}
@@ -1412,7 +1631,6 @@ 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;
@@ -1450,7 +1668,6 @@ 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='';
@@ -1477,15 +1694,21 @@ 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 '';
 }
@@ -1576,6 +1799,13 @@ 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);
 }
 
@@ -1592,9 +1822,10 @@ sub end_startouttext {
 		 ."</td>
 <td>".
                  &Apache::edit::insertlist($target,$token).
+		 '</td><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 ($target eq 'modified') {
@@ -1612,7 +1843,16 @@ sub start_endouttext {
     if ($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;
 }
 
@@ -1645,7 +1885,7 @@ sub start_simpleeditbutton {
         (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
         my $url=$env{'request.noversionuri'};
         $url=~s/\?.*$//;
-	my ($symb) = &Apache::lonxml::whichuser();
+	my ($symb) = &Apache::lonnet::whichuser();
 	$result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
                 '<a href="'.$url.'/smpedit?symb='.&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 />';