--- loncom/homework/structuretags.pm	2003/06/19 20:04:16	1.187
+++ loncom/homework/structuretags.pm	2003/08/13 17:54:12	1.203
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: structuretags.pm,v 1.187 2003/06/19 20:04:16 albertel Exp $
+# $Id: structuretags.pm,v 1.203 2003/08/13 17:54:12 sakharuk 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 {
@@ -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,$publicuser)=
@@ -149,11 +154,8 @@ sub setup_rndseed {
 	}
 	if ($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'});
@@ -409,7 +411,7 @@ 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);
@@ -441,14 +443,19 @@ sub start_problem {
 	    my $due_file_content = $due_file_content[$#due_file_content];
 	    chomp $due_file_content;
 	    my $name_of_resourse= &get_resource_name($parstack,$safeeval);
+	    if (not $name_of_resourse=~/\S+/) {
+		$name_of_resourse=$ENV{'request.uri'};
+		$name_of_resourse=~/\/([^\/]+)$/;
+		$name_of_resourse=$1;
+	    }
 	    if ($due_file_content ne $duedate) {
 		$temp_file = Apache::File->new('>'.$filename);
 		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>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND}\addcontentsline{toc}{subsection}{'.$name_of_resourse.'} \noindent\textit{Due date: '.$duedate.'} \vskip 1 mm\noindent '.$startminipage;	
 		    } 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>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND}\addcontentsline{toc}{subsection}{'.$name_of_resourse.'} \noindent \vskip 1 mm \noindent'.$startminipage;
 			if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
 		    }
 		} else {
@@ -456,7 +463,7 @@ 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>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND}\addcontentsline{toc}{subsection}{'.$name_of_resourse.'} \noindent \vskip 1 mm\noindent'.$startminipage;	
 		    if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
 		} else {
 		    $result .= '\vskip 1mm \\\\\\\\';
@@ -507,7 +514,8 @@ sub end_problem {
 		}
 	    } elsif ($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";
 		}
 	    }
@@ -515,7 +523,7 @@ 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}';
@@ -597,15 +605,39 @@ sub end_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);
 	    }
@@ -615,7 +647,7 @@ 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='';
@@ -642,13 +674,33 @@ sub end_block {
 }
 
 sub start_languageblock {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    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') {
-	&Apache::lonxml::startredirection();
+	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'; }
+            }
+	}
+	if ( ! $result ) {
+	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
+						   $style);
+	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
+	}
+	$result='';
     } elsif ($target eq 'edit') {
 	$result .=&Apache::edit::tag_start($target,$token);
 	$result .=&Apache::edit::text_arg('Include Language:','include',
@@ -668,38 +720,14 @@ sub start_languageblock {
 sub end_languageblock {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $result;
-
-    if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
-	$target eq 'tex' || $target eq 'analyze') {
-	my $text=&Apache::lonxml::endredirection();
-	my $include= &Apache::lonxml::get_param('include',$parstack,$safeeval);
-	my $exclude= &Apache::lonxml::get_param('exclude',$parstack,$safeeval);
-	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'; }
-	    }
-	}
-	if ( ! $result ) {
-	    $result='';
-	} else {
-	    $result=$text;
-	}
-    } elsif ($target eq "edit") {
+    if ($target eq "edit") {
 	$result.= &Apache::edit::tag_end($target,$token,'');
     }
     return $result;
 }
 
 sub start_instructorcomment {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
 
     my $result;
 
@@ -707,7 +735,8 @@ 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='';
@@ -903,11 +932,17 @@ 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}}';}
 		}
@@ -1040,15 +1075,7 @@ 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') {
@@ -1092,5 +1119,23 @@ 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__