--- loncom/homework/structuretags.pm	2003/06/13 14:35:24	1.184
+++ loncom/homework/structuretags.pm	2003/08/30 02:33:25	1.207
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: structuretags.pm,v 1.184 2003/06/13 14:35:24 albertel Exp $
+# $Id: structuretags.pm,v 1.207 2003/08/30 02:33:25 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -38,14 +38,15 @@ use Apache::File();
 use Apache::lonmenu;
 
 BEGIN {
-    &Apache::lonxml::register('Apache::structuretags',('block','languageblock','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext'));
+    &Apache::lonxml::register('Apache::structuretags',('block','languageblock','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext',
+'simpleeditbutton','definetag'));
 }
 
 sub start_web {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
-    if (!($target eq 'web' || $target eq 'edit' || $target eq 'modified' ||
-	  $target eq 'answer' || $target eq 'grade' || $target eq 'meta' )) {
-	my $bodytext=&Apache::lonxml::get_all_text("/web",$parser);
+    my $bodytext=&Apache::lonxml::get_all_text("/web",$parser);
+    if ($target eq 'web') {
+	return $bodytext;
     }
     return '';
 }
@@ -56,12 +57,12 @@ sub end_web {
 
 sub start_tex {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
-    if (!($target eq 'tex' || $target eq 'edit' || $target eq 'modified' ||
-	  $target eq 'answer' || $target eq 'grade' || $target eq 'meta' )) {
-	&Apache::lonxml::debug("tex 1");
-	my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser);
+    my $result='';
+    my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser);
+    if ($target eq 'tex') {
+	return $bodytext.' ';
     }
-    return '';
+    return $result;;
 }
 
 sub end_tex {
@@ -71,7 +72,7 @@ sub end_tex {
 sub page_start {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my %found;
-    foreach my $taginside ($tagstack) {
+    foreach my $taginside (@$tagstack) {
 	foreach my $taglookedfor ('html','body','form') {
 	    if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
 	}
@@ -90,6 +91,7 @@ sub page_start {
 	    'onUnload="'.&Apache::lonmenu::unloadevents().'" ';
 	my $background=&Apache::lonxml::get_param('background',$parstack,
 						  $safeeval);
+	if ($ENV{'browser.imagesuppress'} eq 'on') { $background=''; }
 	if ($background) {
 	    $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
 		$background;
@@ -97,12 +99,15 @@ sub page_start {
 	} else {
 	    my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
 						   $safeeval);
-	    if ($bgcolor) {
+	    if (($bgcolor) && ($ENV{'browser.blackwhite'} ne 'on')) {
 		$body_tag_start.='bgcolor="'.$bgcolor.'" ';
 	    } else {
 		$body_tag_start.='bgcolor="#ffffff"';
 	    }
 	}
+	if ($ENV{'browser.fontenhance'} eq 'on') {
+	    $body_tag_start.=' style="font-size: x-large;" ';
+	}
 	$body_tag_start.='>'.&Apache::lonmenu::menubuttons(undef,$target,1);
 	if ($target eq 'web' && $ENV{'request.state'} ne 'construct') {
 	    my ($symb,undef,undef,undef,$publicuser)=
@@ -125,11 +130,18 @@ sub page_start {
 #use Time::HiRes();
 sub get_resource_name {
     my ($parstack,$safeeval)=@_;
+    if (defined($Apache::lonhomework::name)) {
+	return $Apache::lonhomework::name;
+    }
     my $name=&Apache::lonnet::gettitle();
     if ($name eq '') {
 	$name=&Apache::lonnet::EXT('resource.title');
 	if ($name eq 'con_lost') { $name = ''; }
     }
+    if ($name!~/\S+/) {
+	$name=$ENV{'request.uri'};
+	$name=~s-.*/([^/]+)$-$1-;
+    }
     $Apache::lonhomework::name=$name;
     return $name;
 }
@@ -149,15 +161,15 @@ sub setup_rndseed {
 	}
 	if ($ENV{'form.resetdata'} eq 'New Problem Variation' ||
 	    $ENV{'form.newrandomization'} eq 'New Randomization') {
-	    $rndseed=time;
-	    if ($rndseed eq $ENV{'form.rndseed'}) {
-		srand($rndseed);
-		$rndseed=int(rand(1000000000));
-	    }
+	    srand(time);
+	    $rndseed=int(rand(2100000000));
 	    $ENV{'form.rndseed'}=$rndseed;
 	    delete($ENV{'form.resetdata'});
 	    delete($ENV{'form.newrandomization'});
 	}
+	if (defined($rndseed) && $rndseed ne int($rndseed)) {
+	   $rndseed=join(',',&Math::Random::random_seed_from_phrase($rndseed));
+        }
 	&Apache::lonxml::debug("Setting rndseed to $rndseed");
 	&Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
     }
@@ -263,6 +275,41 @@ credit even if done erroneously.<p />
 ENDCHECKOUT
 }
 
+sub init_problem_globals {
+    my ($type)=@_;
+    #initialize globals
+    if ($type eq 'problem') {
+	$Apache::inputtags::part='0';
+	@Apache::inputtags::partlist=('0');
+	$Apache::lonhomework::problemstatus=
+	    &Apache::lonnet::EXT('resource.0.problemstatus');
+    } else {
+	$Apache::inputtags::part='';
+	@Apache::inputtags::partlist=();
+	$Apache::lonhomework::problemstatus='';	
+    }
+    @Apache::inputtags::responselist = ();
+    @Apache::inputtags::importlist = ();
+    @Apache::inputtags::previous=();
+    @Apache::inputtags::previous_version=();
+    $Apache::structuretags::printanswer='No';
+    @Apache::structuretags::whileconds=();
+    @Apache::structuretags::whilebody=();
+    @Apache::structuretags::whileline=();
+    $Apache::lonhomework::scantronmode=0;
+    undef($Apache::lonhomework::name);
+
+}
+
+sub reset_problem_globals {
+    my ($type)=@_;
+    undef(%Apache::lonhomework::history);
+    undef(%Apache::lonhomework::results);
+    undef($Apache::inputtags::part);
+    undef($Apache::lonhomework::parsing_a_problem);
+    undef($Apache::lonhomework::name);
+}
+
 sub start_problem {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
 
@@ -274,20 +321,7 @@ sub start_problem {
     }
 
     $Apache::lonhomework::parsing_a_problem=1;
-#initialize globals
-    $Apache::inputtags::part='0';
-    @Apache::inputtags::partlist=('0');
-    @Apache::inputtags::responselist = ();
-    @Apache::inputtags::importlist = ();
-    @Apache::inputtags::previous=();
-    @Apache::inputtags::previous_version=();
-    $Apache::structuretags::printanswer='No';
-    @Apache::structuretags::whileconds=();
-    @Apache::structuretags::whilebody=();
-    @Apache::structuretags::whileline=();
-    $Apache::lonhomework::scantronmode=0;
-    $Apache::lonhomework::problemstatus=
-	&Apache::lonnet::EXT('resource.0.problemstatus');
+    &init_problem_globals('problem');
 
     if (defined($ENV{'scantron.maxquest'})) {
 	$Apache::lonhomework::scantronmode=1;
@@ -347,7 +381,7 @@ sub start_problem {
 		    '<input type="submit" name="resetdata"
                              value="New Problem Variation" />'.
 		    '<input type="hidden" name="username"
-                             value="'.$ENV{'form.username'}.'" />';
+                             value="'.$ENV{'form.username'}.'" /> <br />';
 	}
 	($status,$accessmsg) = &Apache::lonhomework::check_access('0');
 	push (@Apache::inputtags::status,$status);
@@ -390,7 +424,7 @@ sub start_problem {
               $body_tag_start \n $form_tag_start".	
 		  '<input type="hidden" name="submitted" value="yes" />';
 		if ($ENV{'request.state'} eq "construct") {
-		    $result.= &problem_web_to_edit_header($rndseed);
+		    $result.= &problem_web_to_edit_header($ENV{'form.rndseed'});
 		}
 		# if we are viewing someone else preserve that info
 		if (defined $ENV{'form.grade_symb'}) {
@@ -406,15 +440,9 @@ sub start_problem {
 	    }
 	} elsif ($target eq 'tex') {
 	    my $startminipage = '';
-	    if ($ENV{'form.problem_split'} ne 'yes') {
+	    if (not $ENV{'form.problem_split'}=~/yes/) {
 		$startminipage = '\begin{minipage}{\textwidth}';
 	    }
-	    my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
-	    if ($name eq '') {
-		$name=&Apache::lonnet::EXT('resource.title');
-		if ($name eq 'con_lost') { $name = ''; }
-	    }
-	    $Apache::lonhomework::name=$name;
 	    my $id = $Apache::inputtags::part;
 	    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
 	    my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'keys');
@@ -443,9 +471,9 @@ sub start_problem {
 		print $temp_file "$duedate\n";
 		if (not $ENV{'request.symb'} =~ m/\.page_/) {
 		    if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
-			$result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent\textit{Due date: '.$duedate.'} \vskip 1 mm\noindent '.$startminipage;	
+			$result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent\textit{Due date: '.$duedate.'} \vskip 1 mm\noindent '.$startminipage.'\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';	
 		    } else {
-			$result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm \noindent'.$startminipage;
+			$result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm \noindent'.$startminipage.'\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
 			if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
 		    }
 		} else {
@@ -453,7 +481,7 @@ sub start_problem {
 		}
 	    } else {
 		if (not $ENV{'request.symb'} =~ m/\.page_/) {
-		    $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm\noindent'.$startminipage;	
+		    $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm\noindent'.$startminipage.'\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';	
 		    if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
 		} else {
 		    $result .= '\vskip 1mm \\\\\\\\';
@@ -504,7 +532,8 @@ sub end_problem {
 		}
 	    } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
 		     $status eq 'UNCHECKEDOUT' ) {
-		if ($target ne 'tex') {
+		if ($target ne 'tex' &&
+		    $ENV{'form.answer_output_mode'} ne 'tex') {
 		    $result.="</body>\n";
 		}
 	    }
@@ -512,7 +541,7 @@ sub end_problem {
 		$result.=&Apache::lonxml::xmlend();
 	    } elsif ($target eq 'tex') {
 		my $endminipage = '';
-		if ($ENV{'form.problem_split'} ne 'yes') {
+		if (not $ENV{'form.problem_split'}=~/yes/) {
 		    $endminipage = '\end{minipage}';
 		}
 		$result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
@@ -545,10 +574,8 @@ sub end_problem {
     if ($ENV{'request.state'} eq 'construct' && $target eq 'web') {
 	&Apache::inputtags::check_for_duplicate_ids();
     }
-    undef(%Apache::lonhomework::history);
-    undef(%Apache::lonhomework::results);
-    undef($Apache::inputtags::part);
-    undef($Apache::lonhomework::parsing_a_problem);
+
+    &reset_problem_globals('problem');
 
     return $result;
 }
@@ -557,7 +584,7 @@ sub end_problem {
 sub start_library {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
-
+    if ($$tagstack[0] eq 'library') { &init_problem_globals('library') };
     if ($target eq 'edit') {
 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
@@ -591,18 +618,43 @@ sub end_library {
 	     $ENV{'request.state'} eq "construct") {
 	$result.='</form></body>'.&Apache::lonxml::xmlend();
     }
+    if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };
     return $result;
 }
 
-sub start_block {
+sub start_definetag {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
 
     my $result;
 
+    my $name = $token->[2]->{'name'};
+    my $skip=&Apache::lonxml::get_all_text("/definetag",$parser);
+    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>';
+    }
+    $skip=~s/\</\&lt\;/gs;
+    $skip=~s/\>/\&gt\;/gs;
+    $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
+    return $result;
+}
+
+sub end_definetag {
+    return '';
+}
+
+sub start_block {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+
+    my $result;
+
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
 	$target eq 'tex' || $target eq 'analyze') {
 	my $code = $token->[2]->{'condition'};
-	if ($code) {
+	if (defined($code)) {
 	    if (!$Apache::lonxml::default_homework_loaded) {
 		&Apache::lonxml::default_homework_load($safeeval);
 	    }
@@ -612,7 +664,7 @@ sub start_block {
 	    $result='1';
 	}
 	if ( ! $result ) {
-	    my $skip=&Apache::lonxml::get_all_text("/block",$parser);
+	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
 	}
 	$result='';
@@ -639,7 +691,7 @@ sub end_block {
 }
 
 sub start_languageblock {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
 
     my $result;
 
@@ -661,7 +713,8 @@ sub start_languageblock {
             }
 	}
 	if ( ! $result ) {
-	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser);
+	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
+						   $style);
 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
 	}
 	$result='';
@@ -691,7 +744,7 @@ sub end_languageblock {
 }
 
 sub start_instructorcomment {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
 
     my $result;
 
@@ -699,7 +752,8 @@ sub start_instructorcomment {
 	$target eq 'tex' || $target eq 'analyze') {
         $result=($ENV{'request.role'}=~/^(in|cc|au|ca|li)/);
 	if ( ! $result ) {
-	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",$parser);
+	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
+						   $parser,$style);
 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
 	}
 	$result='';
@@ -895,11 +949,17 @@ sub start_part {
 		if ( $target eq "web" ) {
 		    $result="<br />Part is not open to be viewed. It $accessmsg<br />";
 		} elsif ( $target eq 'tex' ) {
-		    $result="\\end{minipage}\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\\\begin{minipage}{\\textwidth}";
+		    if (not $ENV{'form.problem_split'}=~/yes/) {
+			$result="\\end{minipage}\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\\\begin{minipage}{\\textwidth}";
+		    } else {
+			$result="\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\";
+		    }
 		}
 	    } else {
 		if ($target eq 'tex') {
-		    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
+		    if (not $ENV{'form.problem_split'}=~/yes/) {
+			$result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
+		    }
 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
 		    if ($Apache::lonhomework::type eq 'exam') { $result .= '\fbox{\textit{'.$weight.' pt}}';}
 		}
@@ -1032,15 +1092,7 @@ sub end_startouttext {
                  &Apache::edit::insertlist($target,$token).
 		 &Apache::edit::end_row().
                  &Apache::edit::start_spanning_row()."\n"
-		 .'<table><tr><td>'.
-		 &Apache::loncommon::help_open_topic("Greek_Symbols",
-						     'Greek Symbols',
-						     undef,undef,600)
-		 .'</td><td>'.
-		 &Apache::loncommon::help_open_topic("Other_Symbols",
-						     'Other Symbols',
-						     undef,undef,600)
-		 .'</td></tr></table>'.
+		 . &Apache::loncommon::helpLatexCheatsheet () .
 		 &Apache::edit::editfield($token->[1],$text,"",80,4);
     }
     if ($target eq 'modified') {
@@ -1084,5 +1136,23 @@ sub delete_startouttext {
     return 1;
 }
 
+sub start_simpleeditbutton {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $result='';
+    if (($target eq 'web') &&
+        (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'}))) {
+        my $url=$ENV{'REQUEST_URI'};
+        $url=~s/\?.*$//;
+	$result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
+                '<a href="'.$url.'/smpedit">Simple Problem Editor</a> - 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 />';
+    }
+    return $result;
+}
+
+sub end_simpleeditbutton {
+    return '';
+}
+
 1;
 __END__