# The LearningOnline Network with CAPA # definition of tags that give a structure to a document # # $Id: structuretags.pm,v 1.497.2.5 2011/12/26 13:45:10 foxr Exp $ # # Copyright Michigan State University Board of Trustees # # This file is part of the LearningOnline Network with CAPA (LON-CAPA). # # LON-CAPA is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # LON-CAPA is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with LON-CAPA; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA # # /home/httpd/html/adm/gpl.txt # # http://www.lon-capa.org/ # ### =pod =head1 NAME Apache::structuretags =head1 SYNOPSIS This is part of the LearningOnline Network with CAPA project described at http://www.lon-capa.org. =head1 NOTABLE SUBROUTINES =over =item =back =cut package Apache::structuretags; use strict; use Apache::lonnet; use Apache::File(); use Apache::lonmenu; use Apache::lonlocal; use Apache::lonxml; use Apache::londefdef; use Apache::lonenc(); use Time::HiRes qw( gettimeofday tv_interval ); use lib '/home/httpd/lib/perl/'; use LONCAPA; BEGIN { &Apache::lonxml::register('Apache::structuretags',('block','languageblock','translated','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','problemtype','startpartmarker','startouttext','endpartmarker','endouttext','simpleeditbutton','definetag')); } #--------------------------------------------------------------------------------- # # This section of code deals with hyphenation management. # We must do three things: # - keep track fo the desired languages to alter the header. # - provide hyphenation selection as needed by each language that appears in the # text. # - Provide the header text needed to make available the desired hyphenations. # # # Hash whose keys are the languages encountered in the document/resource. # my %languages_required; ## # Given a language selection as input returns a chunk of LaTeX that # selects the required hyphenator. # # @param language - the language being selected. # @return string # @retval The LaTeX needed to select the hyphenation appropriate to the language. # sub select_hyphenation { my $language = shift; $language = &Apache::loncommon::latexlanguage($language); # Translate -> latex language. # If there is no latex language there's not much we can do: if ($language) { &require_language($language); my $babel_hyphenation = "\\selectlanguage{$language}"; return $babel_hyphenation; } else { return ''; } } ## # Clears the set of languages required by the document being rendered. # sub clear_required_languages { %languages_required = (); } ## # Allows an external client of this module to register a need for a language: # # @param LaTeX language required: # sub require_language { my $language = shift; $languages_required{$language} = 1; } ## # Provides the header for babel that indicates the languages # the document requires. # @return string # @retval \usepackage[lang1,lang2...]{babel} # @retval '' if there are no languages_required. sub languages_header { my $header =''; my @languages = (keys(%languages_required)); # Only generate the header if there are languages: if (scalar @languages) { my $language_list = join(',', (@languages)); $header = '\usepackage['.$language_list."]{babel}\n"; } return $header; } #---------------------------------------------------------------------------------- sub start_web { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 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 ''; } sub end_web { return ''; } sub start_tex { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result=''; if ($target ne 'edit' && $target ne 'modified') { my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser,$style); if ($target eq 'tex') { # If inside a table, occurrences of \\ must be removed; # else the table blows up. if (&Apache::londefdef::is_inside_of($tagstack, "table")) { $bodytext =~ s/\\\\//g; } return $bodytext.'{}'; } } elsif ($target eq "edit" ) { my $bodytext = &Apache::lonxml::get_all_text_unbalanced("/tex",$parser); my $result = &Apache::edit::tag_start($target,$token); $result .= &Apache::edit::editfield($token->[1],$bodytext,'',80,1); return $result; } elsif ( $target eq "modified" ) { return $token->[4].&Apache::edit::modifiedfield("/tex",$parser); } return $result;; } sub end_tex { return ''; } sub homework_js { return &Apache::loncommon::resize_textarea_js(). &setmode_javascript(). <<'JS'; JS } sub setmode_javascript { return <<"ENDSCRIPT"; ENDSCRIPT } sub page_start { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$name, $extra_head)=@_; my %found; foreach my $taginside (@$tagstack) { foreach my $taglookedfor ('html','body','form') { if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;} } } if ($target eq 'tex') { return &Apache::londefdef::start_html($target,$token,$tagstack, $parstack,$parser,$safeeval); } $extra_head .= &homework_js(). &Apache::lonhtmlcommon::dragmath_js("EditMathPopup"); if (&Apache::lonhtmlcommon::htmlareabrowser()) { my %textarea_args = ( dragmath => 'math', ); $extra_head .= &Apache::lonhtmlcommon::htmlareaselectactive(\%textarea_args); } my $is_task = ($env{'request.uri'} =~ /\.task$/); my $needs_upload; my ($symb)= &Apache::lonnet::whichuser(); my ($map,$resid,$resurl)=&Apache::lonnet::decode_symb($symb); if ($is_task) { $extra_head .= &Apache::lonhtmlcommon::file_submissionchk_js(); } else { if (&Apache::lonnet::EXT("resource.$Apache::inputtags::part.uploadedfiletypes") ne '') { unless ($env{'request.state'} eq 'construct') { my $navmap = Apache::lonnavmaps::navmap->new(); if (ref($navmap)) { my $mapres = $navmap->getResourceByUrl($map); my $is_page; if (ref($mapres)) { $is_page = $mapres->is_page(); } unless ($is_page) { $needs_upload = 1; } } } } else { unless ($env{'request.state'} eq 'construct') { my $navmap = Apache::lonnavmaps::navmap->new(); if (ref($navmap)) { my $mapres = $navmap->getResourceByUrl($map); my $is_page; if (ref($mapres)) { $is_page = $mapres->is_page(); } unless ($is_page) { my $res = $navmap->getBySymb($symb); if (ref($res)) { my $partlist = $res->parts(); if (ref($partlist) eq 'ARRAY') { foreach my $part (@{$partlist}) { my @types = $res->responseType($part); my @ids = $res->responseIds($part); for (my $i=0; $i < scalar(@ids); $i++) { if ($types[$i] eq 'essay') { my $partid = $part.'_'.$ids[$i]; if (&Apache::lonnet::EXT("resource.$partid.uploadedfiletypes") ne '') { $needs_upload = 1; last; } } } } } } } } } } if ($needs_upload) { $extra_head .= &Apache::lonhtmlcommon::file_submissionchk_js(); } } my %body_args; if (defined($found{'html'})) { $body_args{'skip_phases'}{'head'}=1; } else { $extra_head .= &Apache::lonhtmlcommon::spellheader(); $extra_head .= &Apache::londefdef::generate_css_links(); if ($env{'request.state'} eq 'construct') { $extra_head.=&Apache::edit::js_change_detection(). "\n"; } } my $pageheader = ''; if (defined($found{'body'})) { $body_args{'skip_phases'}{'body'}=1; } elsif (!defined($found{'body'}) && $env{'request.state'} eq 'construct') { if ($target eq 'web' || $target eq 'edit') { # Breadcrumbs for Construction Space &Apache::lonhtmlcommon::clear_breadcrumbs(); &Apache::lonhtmlcommon::add_breadcrumb({ 'text' => 'Construction Space', 'href' => &Apache::loncommon::authorspace($env{'request.uri'}), }); # breadcrumbs (and tools) will be created # in start_page->bodytag->innerregister # FIXME Where are we? # &Apache::lonhtmlcommon::add_breadcrumb({ # 'text' => 'Problem Editing', # 'Problem Testing' # 'href' => '', # }); $pageheader =&Apache::loncommon::head_subbox( &Apache::loncommon::CSTR_pageheader()); } } elsif (!defined($found{'body'})) { my %add_entries; my $background=&Apache::lonxml::get_param('background',$parstack, $safeeval); if ($background ne '' ) { $add_entries{'background'} = $background; } my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack, $safeeval); if ($bgcolor eq '' ) { $bgcolor = '#FFFFFF'; } $body_args{'bgcolor'} = $bgcolor; # $body_args{'no_title'} = 1; $body_args{'force_register'} = 1; $body_args{'add_entries'} = \%add_entries; if ( $env{'request.state'} eq 'construct') { $body_args{'only_body'} = 1; } } $body_args{'no_auto_mt_title'} = 1; my $page_start = &Apache::loncommon::start_page($name,$extra_head, \%body_args); $page_start .= $pageheader; if (!defined($found{'body'}) && $env{'request.state'} ne 'construct' && ($target eq 'web' || $target eq 'webgrade')) { my ($symb,undef,undef,undef,$publicuser)= &Apache::lonnet::whichuser(); if ($symb eq '' && !$publicuser) { $page_start .= '

' .&mt('Browsing resource, all submissions are temporary.') .'

'; } } if (!defined($found{'body'}) && $env{'request.state'} ne 'construct') { $page_start .= &Apache::lonxml::message_location(); } my $form_tag_start; if (!defined($found{'form'})) { $form_tag_start='
'."\n"; } } return ($page_start,$form_tag_start); } #use Time::HiRes(); sub get_resource_name { my ($parstack,$safeeval)=@_; my $name; if (defined($Apache::lonhomework::name)) { $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/<//gs; $Apache::lonhomework::name=$name; } return $name; } sub setup_rndseed { my ($safeeval,$target)=@_; my ($symb)=&Apache::lonnet::whichuser(); my ($questiontype,$set_safespace,$rndseed); if ($target eq 'analyze') { $questiontype = $env{'form.grade_questiontype'}; } unless (defined($questiontype)) { $questiontype = $Apache::lonhomework::type; } if ($env{'request.state'} eq "construct" || $symb eq '' || $Apache::lonhomework::type eq 'practice' || $Apache::lonhomework::history{'resource.CODE'}) { &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'}, ['rndseed']); $rndseed=$env{'form.rndseed'}; if (!$rndseed) { $rndseed=$Apache::lonhomework::history{'rndseed'}; if (!$rndseed) { $rndseed=time; } $env{'form.rndseed'}=$rndseed; } if (($env{'request.state'} eq "construct") && ($Apache::lonhomework::type eq 'randomizetry')) { my $tries = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.tries"}; if ($tries) { $rndseed += $tries; } $env{'form.'.$Apache::inputtags::part.'.rndseed'}=$rndseed; } if ( ($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)); $env{'form.rndseed'}=$rndseed; delete($env{'form.resetdata'}); delete($env{'form.newrandomization'}); } $rndseed=~s/\,/\:/g; $rndseed=~s/[^\w\d\:\-]//g; if (defined($rndseed)) { my ($c1,$c2)=split(/\:/,$rndseed); unless ($c2) { $c2=0; } unless (($c1==int($c1)) && ($c2==int($c2))) { $rndseed=join(':',&Apache::lonnet::digest($rndseed)); } } if ($Apache::lonhomework::history{'resource.CODE'}) { $rndseed=&Apache::lonnet::rndseed(); } $set_safespace = 1; } elsif ($questiontype eq 'randomizetry') { if ($target eq 'analyze') { if (defined($env{'form.grade_rndseed'})) { $rndseed = $env{'form.grade_rndseed'}; } } unless (($target eq 'analyze') && (defined($rndseed))) { $rndseed=&Apache::lonnet::rndseed(); my $curr_try = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.tries"}; if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') { $curr_try ++; } if ($rndseed =~/^(\d+)[,:](\d+)$/) { $rndseed = $1; } if ($curr_try) { my $reqtries = &Apache::lonnet::EXT("resource.$Apache::inputtags::part.randomizeontries"); if (($reqtries =~ /^\d+$/) && ($reqtries > 1)) { my $inc = int(($curr_try-1)/$reqtries); $rndseed += $inc; } else { $rndseed += $curr_try; } } } $set_safespace = 1; } if ($set_safespace) { if ($safeeval) { &Apache::lonxml::debug("Setting rndseed to $rndseed"); &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval); } } unless (($env{'request.state'} eq "construct") || ($symb eq '')) { $env{'form.'.$Apache::inputtags::part.'.rndseed'}=$rndseed; } return $rndseed; } sub remember_problem_state { return ' '; } sub problem_edit_action_button { my ($name,$action,$accesskey,$text,$flag)=@_; my $actionscript="setmode(this.form,'$action')"; return "\n"; } sub problem_edit_buttons { my ($mode)=@_; # Buttons that do not save my $result='
'. &problem_edit_action_button('subdiscview','discard','d','Discard Edits and View',1); if ($mode eq 'editxml') { $result.=&problem_edit_action_button('subedit','edit','e','Edit',1); $result.=&problem_edit_action_button('subundo','undoxml','u','Undo',1); $result.=&Apache::lonhtmlcommon::dragmath_button("LC_editxmltext",1); } else { $result.=&problem_edit_action_button('subeditxml','editxml','x','EditXML',1); $result.=&problem_edit_action_button('subundo','undo','u','Undo',1); } $result.="\n
"; # Buttons that save $result.='
'; if ($mode eq 'editxml') { $result.=&problem_edit_action_button('subsaveedit','saveeditxml','s','Save and EditXML'); $result.=&problem_edit_action_button('subsaveview','saveviewxml','v','Save and View'); } else { $result.=&problem_edit_action_button('subsaveedit','saveedit','s','Save and Edit'); $result.=&problem_edit_action_button('subsaveview','saveview','v','Save and View'); } $result.="\n
\n"; return $result; } sub problem_edit_header { return ''. &remember_problem_state('edit').'
'.&mt('Problem Editing').&Apache::loncommon::help_open_menu('Problem Editing','Problem_Editor_XML_Index',5,'Authoring').'
'. ''. &problem_edit_buttons().'
'.&Apache::lonxml::message_location().'
'. '
'; } sub problem_edit_footer { return '

'. "\n
\n".&Apache::loncommon::end_page(); } sub option { my ($value,$name) = @_; my $result ="