--- loncom/xml/lonxml.pm 2008/03/07 20:49:17 1.472 +++ loncom/xml/lonxml.pm 2010/09/29 15:53:07 1.516 @@ -1,7 +1,7 @@ # The LearningOnline Network with CAPA # XML Parser Module # -# $Id: lonxml.pm,v 1.472 2008/03/07 20:49:17 www Exp $ +# $Id: lonxml.pm,v 1.516 2010/09/29 15:53:07 raeburn Exp $ # # Copyright Michigan State University Board of Trustees # @@ -37,6 +37,25 @@ # to any other parties under any circumstances. # +=pod + +=head1 NAME + +Apache::lonxml + +=head1 SYNOPSIS + +XML Parsing Module + +This is part of the LearningOnline Network with CAPA project +described at http://www.lon-capa.org. + + +=head1 SUBROUTINES + +=cut + + package Apache::lonxml; use vars @@ -90,7 +109,9 @@ use Apache::lonfeedback(); use Apache::lonmsg(); use Apache::loncacc(); use Apache::lonmaxima(); +use Apache::lonr(); use Apache::lonlocal; +use Apache::lonhtmlcommon(); #==================================== Main subroutine: xmlparse @@ -201,101 +222,6 @@ sub xmlend { return $discussion; } -sub tokeninputfield { - my $defhost=$Apache::lonnet::perlvar{'lonHostID'}; - $defhost=~tr/a-z/A-Z/; - return (< - function updatetoken() { - var comp=new Array; - var barcode=unescape(document.tokeninput.barcode.value); - comp=barcode.split('*'); - if (typeof(comp[0])!="undefined") { - document.tokeninput.codeone.value=comp[0]; - } - if (typeof(comp[1])!="undefined") { - document.tokeninput.codetwo.value=comp[1]; - } - if (typeof(comp[2])!="undefined") { - comp[2]=comp[2].toUpperCase(); - document.tokeninput.codethree.value=comp[2]; - } - document.tokeninput.barcode.value=''; - } - -
- - - - -
DocID Checkin
- - - - - - - -
Scan in Barcode
or Type in DocID - -* - -* - -
-
-
-ENDINPUTFIELD -} - -sub maketoken { - my ($symb,$tuname,$tudom,$tcrsid)=@_; - unless ($symb) { - $symb=&Apache::lonnet::symbread(); - } - unless ($tuname) { - $tuname=$env{'user.name'}; - $tudom=$env{'user.domain'}; - $tcrsid=$env{'request.course.id'}; - } - - return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid); -} - -sub printtokenheader { - my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_; - unless ($token) { return ''; } - - my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser(); - unless ($tsymb) { - $tsymb=$symb; - } - unless ($tuname) { - $tuname=$name; - $tudom=$domain; - $tcrsid=$courseid; - } - - my $plainname=&Apache::loncommon::plainname($tuname,$tudom); - - if ($target eq 'web') { - my %idhash=&Apache::lonnet::idrget($tudom,($tuname)); - return - ''. - &mt('Checked out for').' '.$plainname. - '
'.&mt('User').': '.$tuname.' at '.$tudom. - '
'.&mt('ID').': '.$idhash{$tuname}. - '
'.&mt('CourseID').': '.$tcrsid. - '
'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}. - '
'.&mt('DocID').': '.$token. - '
'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'
'; - } else { - return $token; - } -} - sub printalltags { my $temp; foreach $temp (sort keys %Apache::lonxml::alltags) { @@ -361,8 +287,8 @@ sub xmlparse { $safeeval,\%style_for_target,1); if (@stack) { - &warning("At end of file some tags were still left unclosed, ". - '<'.join('>, <',reverse(@stack)). + &warning(&mt('At end of file some tags were still left unclosed:'). + ' <'.join('>, <',reverse(@stack)). '>'); } if ($env{'request.uri'}) { @@ -379,6 +305,10 @@ sub xmlparse { } &init_state(); if ($env{'form.return_only_error_and_warning_counts'}) { + if ($env{'request.filename'}=~/\.(html|htm|xml)$/i) { + my $error=&verify_html($content_file_string); + if ($error) { $errorcount++; } + } return "$errorcount:$warningcount"; } return $finaloutput; @@ -482,10 +412,10 @@ sub inner_xmlparse { while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) { my $lasttag=$$stack[-1]; if ($token->[1] =~ /^\Q$lasttag\E$/i) { - &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>'); + &Apache::lonxml::warning(&mt('Using tag [_1] on line [_2] as end tag to [_3]','</'.$token->[1].'>','.$token->[3].','<'.$$stack[-1].'>')); last; } else { - &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file'); + &Apache::lonxml::warning(&mt('Found tag [_1] on line [_2] when looking for [_3] in file.','</'.$token->[1].'>',$token->[3],'</'.$$stack[-1].'>')); &end_tag($stack,$parstack,$token); } } @@ -501,11 +431,11 @@ sub inner_xmlparse { if (!$Apache::lonxml::usestyle) { $extras=$Apache::lonxml::style_values; } - if ( $#$parstack > -1 ) { - $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]); - } else { - $result= &Apache::run::evaluate($result,$safeeval,$extras); - } + if ( $#$parstack > -1 ) { + $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]); + } else { + $result= &Apache::run::evaluate($result,$safeeval,$extras); + } } $Apache::lonxml::post_evaluate=1; @@ -546,6 +476,10 @@ sub inner_xmlparse { } if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) { $finaloutput=&afterburn($finaloutput); + } + if ($target eq 'modified') { +# if modfied, handle startpart and endpart + $finaloutput=~s/\]*\>(.*)\]*\>/$1<\/part>/gs; } return $finaloutput; } @@ -654,6 +588,7 @@ sub setup_globals { $Apache::lonxml::request=$request; $errorcount=0; $warningcount=0; + $Apache::lonxml::internal_error=0; $Apache::lonxml::default_homework_loaded=0; $Apache::lonxml::usestyle=1; &init_counter(); @@ -707,13 +642,15 @@ sub setup_globals { sub init_safespace { my ($target,$safeeval,$safehole,$safeinit) = @_; - $safeeval->deny_only(':dangerous'); $safeeval->reval('use Math::Complex;'); + $safeeval->reval('use LaTeX::Table;'); + $safeeval->deny_only(':dangerous'); $safeeval->permit_only(":default"); $safeeval->permit("entereval"); $safeeval->permit(":base_math"); $safeeval->permit("sort"); $safeeval->permit("time"); + $safeeval->permit("caller"); $safeeval->deny("rand"); $safeeval->deny("srand"); $safeeval->deny(":base_io"); @@ -730,9 +667,19 @@ sub init_safespace { $safehole->wrap(\&Apache::lonmaxima::maxima_cas_formula_fix,$safeeval, '&maxima_cas_formula_fix'); + $safehole->wrap(\&Apache::lonr::r_eval,$safeeval,'&r_eval'); + $safehole->wrap(\&Apache::lonr::Rentry,$safeeval,'&Rentry'); + $safehole->wrap(\&Apache::lonr::Rarray,$safeeval,'&Rarray'); + $safehole->wrap(\&Apache::lonr::r_check,$safeeval,'&r_check'); + $safehole->wrap(\&Apache::lonr::r_cas_formula_fix,$safeeval, + '&r_cas_formula_fix'); + $safehole->wrap(\&Apache::caparesponse::capa_formula_fix,$safeeval, '&capa_formula_fix'); + $safehole->wrap(\&Apache::lonlocal::locallocaltime,$safeeval, + '&locallocaltime'); + $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin'); $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos'); $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan'); @@ -1007,7 +954,7 @@ sub get_id { my ($parstack,$safeeval)=@_; my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval); if ($env{'request.state'} eq 'construct' && $id =~ /([._]|[^\w\d\s[:punct:]])/) { - &error(&mt("ID "[_1]" contains invalid characters, IDs are only allowed to contain letters, numbers, spaces and -",''.$id.'')); + &error(&mt('ID [_1] contains invalid characters. IDs are only allowed to contain letters, numbers, spaces and -','"'.$id.'"')); } if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; } return $id; @@ -1076,6 +1023,7 @@ Optional Arguments: sub increment_counter { my ($increment, $part_response) = @_; + if ($env{'form.grade_noincrement'}) { return; } if (!defined($increment) || $increment le 0) { $increment = 1; } @@ -1117,7 +1065,7 @@ sub init_counter { } sub store_counter { - &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter)); + &Apache::lonnet::appenv({'form.counter' => $Apache::lonxml::counter}); $Apache::lonxml::counter_changed=0; return ''; } @@ -1138,7 +1086,7 @@ sub store_counter { sub restore_problem_counter { if (defined($state)) { - &Apache::lonnet::appenv(('form.counter' => $state)); + &Apache::lonnet::appenv({'form.counter' => $state}); } } sub get_problem_counter { @@ -1375,7 +1323,7 @@ sub writeallows { &Apache::lonnet::hreflocation($thisdir,&unescape($_))}=$thisurl; } @extlinks=(); - &Apache::lonnet::appenv(%httpref); + &Apache::lonnet::appenv(\%httpref); } sub register_ssi { @@ -1442,7 +1390,7 @@ sub storefile { $fh->close(); return 1; } else { - &warning("Unable to save file $file"); + &warning(&mt('Unable to save file [_1]',''.$file.'')); return 0; } } @@ -1475,68 +1423,104 @@ SIMPLECONTENT return $filecontents; } +sub createnewjs { + my $filecontents=(< + + +SIMPLECONTENT + return $filecontents; +} + sub verify_html { my ($filecontents)=@_; - if ($filecontents!~/(?:\<|\<\;)(?:html|xml)[^\<]*(?:\>|\>\;)/is) { - return &mt('File does not have [_1] or [_2] starting tag','<html>','<xml>'); - } - if ($filecontents!~/(?:\<|\<\;)\/(?:html|xml)(?:\>|\>\;)/is) { - return &mt('File does not have [_1] or [_2] ending tag','<html>','<xml>'); - } - if ($filecontents!~/(?:\<|\<\;)(?:body|frameset)[^\<]*(?:\>|\>\;)/is) { - return &mt('File does not have [_1] or [_2] starting tag','<body>','<frameset>'); - } - if ($filecontents!~/(?:\<|\<\;)\/(?:body|frameset)[^\<]*(?:\>|\>\;)/is) { - return &mt('File does not have [_1] or [_2] ending tag','<body>','<frameset>'); + my ($is_html,$is_xml); + if ($filecontents =~/(?:\<|\<\;)\?xml[^\<]*\?(?:\>|\>\;)/is) { + $is_xml = 1; + } elsif ($filecontents =~/(?:\<|\<\;)html(?:\s+[^\<]+|\s*)[^\<]*(?:\>|\>\;)/is) { + $is_html = 1; + } + unless ($is_xml || $is_html) { + return &mt('File does not have [_1] or [_2] starting tag','<html>','<?xml ?>'); + } + if ($is_html) { + if ($filecontents!~/(?:\<|\<\;)\/html(?:\>|\>\;)/is) { + return &mt('File does not have [_1] ending tag','<html>'); + } + if ($filecontents!~/(?:\<|\<\;)(?:body|frameset)[^\<]*(?:\>|\>\;)/is) { + return &mt('File does not have [_1] or [_2] starting tag','<body>','<frameset>'); + } + if ($filecontents!~/(?:\<|\<\;)\/(?:body|frameset)[^\<]*(?:\>|\>\;)/is) { + return &mt('File does not have [_1] or [_2] ending tag','<body>','<frameset>'); + } } return ''; } +sub renderingoptions { + my %langchoices=('' => ''); + foreach (&Apache::loncommon::languageids()) { + if (&Apache::loncommon::supportedlanguagecode($_)) { + $langchoices{&Apache::loncommon::supportedlanguagecode($_)} + = &Apache::loncommon::plainlanguagedescription($_); + } + } + my $output; + unless ($env{'form.forceedit'}) { + $output .= + ''. + &mt('Language:').' '. + &Apache::loncommon::select_form( + $env{'form.languages'}, + 'languages', + {&Apache::lonlocal::texthash(%langchoices)}). + ''; + } + $output .= + ' '. + &mt('Math Rendering:').' '. + &Apache::loncommon::select_form( + $env{'form.texengine'}, + 'texengine', + {&Apache::lonlocal::texthash + ('' => '', + 'tth' => 'tth (TeX to HTML)', + 'jsMath' => 'jsMath', + 'mimetex' => 'mimetex (Convert to Images)')}). + ''; + return $output; +} + sub inserteditinfo { my ($filecontents, $filetype, $filename)=@_; $filecontents = &HTML::Entities::encode($filecontents,'<>&"'); my $xml_help = ''; my $initialize=''; my $textarea_id = 'filecont'; + my $dragmath_button; my ($add_to_onload, $add_to_onresize); $initialize=&Apache::lonhtmlcommon::spellheader(); - if ($filetype eq 'html' - && (!&Apache::lonhtmlcommon::htmlareablocked() && - &Apache::lonhtmlcommon::htmlareabrowser())) { - $textarea_id .= '___Frame'; + if (($filetype eq 'html') && (&Apache::lonhtmlcommon::htmlareabrowser())) { my $lang = &Apache::lonhtmlcommon::htmlarea_lang(); - $initialize.=(< -lonca - function initDocument() { - var oFCKeditor = new FCKeditor('filecont'); - oFCKeditor.Config['CustomConfigurationsPath'] = '/fckeditor/loncapaconfig.js' ; - oFCKeditor.Config['FullPage'] = true - oFCKeditor.Config['AutoDetectLanguage'] = false; - oFCKeditor.Config['DefaultLanguage'] = "$lang"; - oFCKeditor.ReplaceTextarea(); - } - function check_if_dirty(editor) { - if (editor.IsDirty()) { - unClean(); - } - } - function FCKeditor_OnComplete(editor) { - editor.Events.AttachEvent("OnSelectionChange",check_if_dirty); - resize_textarea('$textarea_id','LC_aftertextarea'); - } - -FULLPAGE - } else { - $initialize.=(< 'true', + dragmath => 'math', + ); + $initialize .= &Apache::lonhtmlcommon::htmlareaselectactive(\%textarea_args); + } + $initialize .= (< +// FULLPAGE + if ($filetype eq 'html') { + $dragmath_button = ''.&Apache::lonhtmlcommon::dragmath_button('filecont',1).''; + $initialize .= "\n".&Apache::lonhtmlcommon::dragmath_js('EditMathPopup'); } - $add_to_onload = 'initDocument();'; $add_to_onresize = "resize_textarea('$textarea_id','LC_aftertextarea');"; @@ -1545,17 +1529,24 @@ FULLPAGE } my $titledisplay=&display_title(); + my $textareaclass; my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit', 'vi' => 'Save and View', 'dv' => 'Discard Edits and View', 'un' => 'undo', 'ed' => 'Edit'); - my $spelllink .=&Apache::lonhtmlcommon::spelllink('xmledit','filecont'); + my $spelllink = &Apache::lonhtmlcommon::spelllink('xmledit','filecont'); my $textarea_events = &Apache::edit::element_change_detection(); my $form_events = &Apache::edit::form_change_detection(); - my $htmlerror=&verify_html($filecontents); - if ($htmlerror) { - $htmlerror=''.$htmlerror.'

'; + my $htmlerror; + if ($filetype eq 'html') { + $htmlerror=&verify_html($filecontents); + if ($htmlerror) { + $htmlerror=''.$htmlerror.''; + } + if (&Apache::lonhtmlcommon::htmlareabrowser()) { + $textareaclass = 'class="LC_richDefaultOff"'; + } } my $editfooter=(< - $spelllink $htmlerror + $htmlerror $dragmath_button
- +
$spelllink

$titledisplay @@ -1618,9 +1609,8 @@ sub get_target { sub handler { my $request=shift; - + my $target=&get_target(); - $Apache::lonxml::debug=$env{'user.debug'}; &Apache::loncommon::content_type($request,'text/html'); @@ -1629,18 +1619,47 @@ sub handler { $request->set_last_modified(&Apache::lonnet::metadata($request->uri, 'lastrevisiondate')); } + # Embedded Flash movies from Camtasia served from https will not display in IE + # if XML config file has expired from cache. + if ($ENV{'SERVER_PORT'} == 443) { + if ($request->uri =~ /\.xml$/) { + my ($httpbrowser,$clientbrowser) = + &Apache::loncommon::decode_user_agent($request); + if ($clientbrowser =~ /^explorer$/i) { + delete $request->headers_out->{'Cache-control'}; + delete $request->headers_out->{'Pragma'}; + my $expiration = time + 60; + my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime($expiration)); + $request->headers_out->set("Expires" => $date); + } + } + } $request->send_http_header; return OK if $request->header_only; my $file=&Apache::lonnet::filelocation("",$request->uri); - my $filetype; - if ($file =~ /\.sty$/) { - $filetype='sty'; + my ($filetype,$breadcrumbtext); + if ($file =~ /\.(sty|css|js|txt|tex)$/) { + $filetype=$1; } else { $filetype='html'; } + if ($filetype eq 'sty') { + $breadcrumbtext = 'Style File Editor'; + } elsif ($filetype eq 'js') { + $breadcrumbtext = 'Javascript Editor'; + } elsif ($filetype eq 'css') { + $breadcrumbtext = 'CSS Editor'; + } elsif ($filetype eq 'txt') { + $breadcrumbtext = 'Text Editor'; + } elsif ($filetype eq 'tex') { + $breadcrumbtext = 'TeX Editor'; + } else { + $breadcrumbtext = 'HTML Editor'; + } + # # Edit action? Save file. # @@ -1659,17 +1678,22 @@ sub handler { if ($filecontents eq -1) { my $start_page=&Apache::loncommon::start_page('File Error'); my $end_page=&Apache::loncommon::end_page(); - my $fnf=&mt('File not found'); + my $errormsg='

' + .&mt('File not found: [_1]' + ,''.$file.'') + .'

'; $result=(<$fnf: $file +$errormsg $end_page ENDNOTFOUND $filecontents=''; if ($env{'request.state'} ne 'published') { if ($filetype eq 'sty') { $filecontents=&createnewsty(); - } else { + } elsif ($filetype eq 'js') { + $filecontents=&createnewjs(); + } elsif ($filetype ne 'css' && $filetype ne 'txt' && $filetype ne 'tex') { $filecontents=&createnewhtml(); } $env{'form.editmode'}='Edit'; #force edit mode @@ -1685,28 +1709,63 @@ ENDNOTFOUND ['editmode']); } if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) { - &Apache::structuretags::reset_problem_globals(); - $result = &Apache::lonxml::xmlparse($request,$target,$filecontents, - '',%mystyle); + if ($filetype eq 'html' || $filetype eq 'sty') { + &Apache::structuretags::reset_problem_globals(); + $result = &Apache::lonxml::xmlparse($request,$target, + $filecontents,'',%mystyle); # .html files may contain or need to clean # up if it did - &Apache::structuretags::reset_problem_globals(); - &Apache::lonhomework::finished_parsing(); + &Apache::structuretags::reset_problem_globals(); + &Apache::lonhomework::finished_parsing(); + } elsif ($filetype eq 'tex') { + $result = &Apache::lontexconvert::converted(\$filecontents, + $env{'form.texengine'}); + if ($env{'form.return_only_error_and_warning_counts'}) { + if (&verify_html(''.$result.'')) { + $errorcount++; + } + $result = "$errorcount:$warningcount"; + } + } else { + $result = $filecontents; + } &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'}, ['rawmode']); if ($env{'form.rawmode'}) { $result = $filecontents; } - if ($filetype eq 'sty') { - my $controls = - ($env{'request.state'} eq 'construct') ? &Apache::londefdef::edit_controls() - : ''; - my %options = ('bgcolor' => '#FFFFFF'); - $result = - &Apache::loncommon::start_page(undef,undef,\%options). - $controls. - $result. - &Apache::loncommon::end_page(); - } - } + if (($filetype ne 'html') && + (!$env{'form.return_only_error_and_warning_counts'})) { + my $nochgview = 1; + my $controls = ''; + if ($env{'request.state'} eq 'construct') { + $controls = &Apache::loncommon::head_subbox( + &Apache::loncommon::CSTR_pageheader() + .&Apache::londefdef::edit_controls($nochgview)); + } + if ($filetype ne 'sty' && $filetype ne 'tex') { + $result =~ s//>/g; + $result = ''. + '
'.$result.
+                              '
'; + } + my $brcrum; + if ($env{'request.state'} eq 'construct') { + $brcrum = [{'href' => &Apache::loncommon::authorspace(), + 'text' => 'Construction Space'}, + {'href' => '', + 'text' => $breadcrumbtext}]; + } else { + $brcrum = ''; # FIXME: Where are we? + } + my %options = ('bread_crumbs' => $brcrum, + 'bgcolor' => '#FFFFFF'); + $result = + &Apache::loncommon::start_page(undef,undef,\%options) + .$controls + .$result + .&Apache::loncommon::end_page(); + } + } } # @@ -1723,26 +1782,32 @@ ENDNOTFOUND my %options = ('add_entries' => - {'onresize' => $add_to_onresize, - 'onload' => $add_to_onload, }); - - if ($env{'environment.remote'} ne 'off') { - $options{'bgcolor'} = '#FFFFFF'; - $options{'only_body'} = 1; - } + {'onresize' => $add_to_onresize, + 'onload' => $add_to_onload, }); + my $header; + if ($env{'request.state'} eq 'construct') { + $options{'bread_crumbs'} = [{ + 'href' => &Apache::loncommon::authorspace(), + 'text' => 'Construction Space'}, + {'href' => '', + 'text' => $breadcrumbtext}]; + $header = &Apache::loncommon::head_subbox( + &Apache::loncommon::CSTR_pageheader()); + } my $js = &Apache::edit::js_change_detection(). &Apache::loncommon::resize_textarea_js(); my $start_page = &Apache::loncommon::start_page(undef,$js, \%options); - $result=$start_page. - &Apache::lonxml::message_location(). - $edit_info. - &Apache::loncommon::end_page(); - } + $result = $start_page + .$header + .&Apache::lonxml::message_location() + .$edit_info + .&Apache::loncommon::end_page(); + } } if ($filetype eq 'html') { &writeallows($request->uri); } - + &Apache::lonxml::add_messages(\$result); $request->print($result); @@ -1757,7 +1822,8 @@ sub display_title { $title = $env{'request.filename'}; $title = substr($title, rindex($title, '/') + 1); } - $result = ""; + $result = ""; } return $result; } @@ -1794,6 +1860,8 @@ sub error { $errorcount++; + $Apache::lonxml::internal_error=1; + if (defined($Apache::inputtags::part)) { if ( @Apache::inputtags::response ) { push(@errors, @@ -1810,18 +1878,22 @@ sub error { if ( &show_error_warn_msg() ) { # If printing in construction space, put the error inside 

 	push(@Apache::lonxml::error_messages,
-	     $Apache::lonxml::warnings_error_header.
-	     "ERROR:".join("
\n",@errors)."
\n");
+	     $Apache::lonxml::warnings_error_header
+             .'
'
+             .''.&mt('ERROR:').' '.join("
\n",@errors)
+             ."
\n");
 	$Apache::lonxml::warnings_error_header='';
     } else {
 	my $errormsg;
 	my ($symb)=&Apache::lonnet::symbread();
 	if ( !$symb ) {
 	    #public or browsers
-	    $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
+	    $errormsg=&mt("An error occurred while processing this resource. The author has been notified.");
 	}
 	my $host=$Apache::lonnet::perlvar{'lonHostID'};
-	push(@errors, "The error occurred on host $host");
+	push(@errors,
+        &mt("The error occurred on host [_1]",
+             "$host"));
 
 	my $msg = join('
', @errors);
 
@@ -1855,9 +1927,9 @@ sub error {
 		}
 	    }
 	    if ($env{'request.role.adv'}) {
-		$errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
+		$errormsg=&mt("An error occurred while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
 	    } else {
-		$errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
+		$errormsg=&mt("An error occurred while processing this resource. The instructor has been notified.");
 	    }
 	}
 	push(@Apache::lonxml::error_messages,"$errormsg 
");
@@ -1870,8 +1942,11 @@ sub warning {
     if ($env{'form.grade_target'} ne 'tex') {
 	if ( &show_error_warn_msg() ) {
 	    push(@Apache::lonxml::warning_messages,
-		 $Apache::lonxml::warnings_error_header.
-		 "WARNING:".join('
',@_)."
\n");
+		 $Apache::lonxml::warnings_error_header
+                .'
'
+                .&mt('[_1]W[_2]ARNING','','').": ".join('
',@_)
+                ."
\n"
+                );
 	    $Apache::lonxml::warnings_error_header='';
 	}
     }
@@ -2096,7 +2171,105 @@ sub get_tag {
     return $insertlist{"$tagnum.tag"};
 }
 
+############################################################
+#                                           PDF-FORM-METHODS
+
+=pod
+
+=item &print_pdf_radiobutton(fieldname, value)
+
+Returns a latexline to generate a PDF-Form-Radiobutton.
+Note: Radiobuttons with equal names are automaticly grouped 
+      in a selection-group.
+
+$fieldname: PDF internalname of the radiobutton(group)
+$value:     Value of radiobutton
+
+=cut
+sub print_pdf_radiobutton {
+    my ($fieldname, $value) = @_;
+    return '\radioButton[\symbolchoice{circle}]{'
+           .$fieldname.'}{10bp}{10bp}{'.$value.'}';
+}
+
+
+=pod
+
+=item &print_pdf_start_combobox(fieldname)
+
+Starts a latexline to generate a PDF-Form-Combobox with text.
+
+$fieldname: PDF internal name of the Combobox
+
+=cut
+sub print_pdf_start_combobox {
+    my $result;
+    my ($fieldName) = @_;
+    $result .= '\begin{tabularx}{\textwidth}{p{2.5cm}X}'."\n";
+    $result .= '\comboBox[]{'.$fieldName.'}{2.3cm}{14bp}{'; # 
+
+    return $result;
+}
+
+
+=pod
+
+=item &print_pdf_add_combobox_option(options)
+
+Generates a latexline to add Options to a PDF-Form-ComboBox.
+
+$option: PDF internal name of the Combobox-Option
+
+=cut
+sub print_pdf_add_combobox_option {
+
+    my $result;
+    my ($option) = @_;  
+
+    $result .= '('.$option.')';
+    
+    return $result;
+}
+
+
+=pod
+
+=item &print_pdf_end_combobox(text) {
+
+Returns latexcode to end a PDF-Form-Combobox with text.
+
+=cut
+sub print_pdf_end_combobox {
+    my $result;
+    my ($text) = @_;
+
+    $result .= '}&'.$text."\\\\\n";
+    $result .= '\end{tabularx}' . "\n";
+    $result .= '\hspace{2mm}' . "\n";
+    return $result;
+}
+
+
+=pod
+
+=item &print_pdf_hiddenField(fieldname, user, domain)
+
+Returns a latexline to generate a PDF-Form-hiddenField with userdata.
+
+$fieldname label for hiddentextfield
+$user:    name of user
+$domain:  domain of user
+
+=cut
+sub print_pdf_hiddenfield {
+    my $result;
+    my ($fieldname, $user, $domain) = @_;
+
+    $result .= '\textField [\F{\FHidden}\F{-\FPrint}\V{'.$domain.'&'.$user.'}]{'.$fieldname.'}{0in}{0in}'."\n";
+
+    return $result;
+}
+
 1;
 __END__
 
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