version 1.40, 2004/10/12 22:55:22
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version 1.105, 2011/02/10 19:28:29
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Line 36
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Line 36
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# The C source of the Code may not be distributed by the Licensee |
# The C source of the Code may not be distributed by the Licensee |
# to any other parties under any circumstances. |
# to any other parties under any circumstances. |
# |
# |
# 05/29/00,05/30,10/11,10/20 Gerd Kortemeyer |
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# 5/4 Gerd Kortemeyer |
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package Apache::lontexconvert; |
package Apache::lontexconvert; |
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use strict; |
use strict; |
use tth(); |
use tth(); |
use vars qw($errorstring); |
use vars qw($errorstring); |
use Apache(); |
#use Apache::lonxml(); |
use Apache::lonmsg(); |
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use Apache::lonxml(); |
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use Apache::lonmenu(); |
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use Apache::lonlocal; |
use Apache::lonlocal; |
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use Apache::lonnet; |
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use lib '/home/httpd/lib/perl/'; |
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use LONCAPA; |
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use URI::Escape; |
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use IO::Socket::INET; |
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# ====================================================================== Header |
# ====================================================================== Header |
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sub init_tth { |
sub init_tth { |
my $options=$ENV{'course.'.$ENV{'request.course.id'}.'.tthoptions'}; |
my $options=$env{'course.'.$env{'request.course.id'}.'.tthoptions'}; |
if ($ENV{'browser.mathml'}) { |
if ($options =~ /\S/) { |
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$options = ' '.$options; |
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} else { |
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undef($options); |
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} |
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if ($env{'browser.mathml'}) { |
&tth::ttminit(); |
&tth::ttminit(); |
if ($ENV{'browser.unicode'}) { |
if ($env{'browser.unicode'}) { |
&tth::ttmoptions('-L -u1 '.$options); |
&tth::ttmoptions('-L -u1'.$options); |
} else { |
} else { |
&tth::ttmoptions('-L -u0 '.$options); |
&tth::ttmoptions('-L -u0'.$options); |
} |
} |
} else { |
} else { |
&tth::tthinit(); |
&tth::tthinit(); |
if ($ENV{'browser.unicode'}) { |
if ($env{'browser.unicode'}) { |
&tth::tthoptions('-L -u1 '.$options); |
&tth::tthoptions('-L -u1'.$options); |
} else { |
} else { |
&tth::tthoptions('-L -u0 '.$options); |
&tth::tthoptions('-L -u0'.$options); |
} |
} |
} |
} |
} |
} |
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sub header { |
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$errorstring=''; |
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my $time=time; |
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&init_tth(); |
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return &Apache::lonxml::xmlbegin(). |
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"\n<head>\n". |
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&Apache::lonxml::fontsettings(). |
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&Apache::lonmenu::registerurl(undef,'tex'). |
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"\n</head>\n"; |
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} |
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# ================================================================== Conversion |
# ================================================================== Conversion |
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$Apache::lontexconvert::messedup=0; |
$Apache::lontexconvert::messedup=0; |
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# we need this routine because &converted can get called from inside |
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# of the safespace (through &xmlparse('<m>stuff</m>') which doesn't |
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# allow the opcode for alarm, so we need to compile this before we get |
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# into the safe space since opcode checks only occur at compile time |
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sub convert_real { |
sub convert_real { |
my ($texstring)=@_; |
my ($texstring)=@_; |
my ($xmlstring,$errorstring); |
my ($xmlstring,$errorstring); |
Line 100 sub convert_real {
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Line 91 sub convert_real {
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$Apache::lontexconvert::messedup=1; |
$Apache::lontexconvert::messedup=1; |
die &mt("TeX unconverted due to errors"); |
die &mt("TeX unconverted due to errors"); |
}; |
}; |
alarm($Apache::lonnet::perlvar{'lonScriptTimeout'}); |
&Apache::lonxml::start_alarm(); |
if ($ENV{'browser.mathml'}) { |
if ($env{'browser.mathml'}) { |
$xmlstring=&tth::ttm($$texstring); |
$xmlstring=&tth::ttm($$texstring); |
$xmlstring=~s/\<math\>/\<math xmlns=\"\&mathns\;\"\>/g; |
$xmlstring=~s/\<math\>/\<math xmlns=\"\&mathns\;\"\>/g; |
$xmlstring=~s/\<br\>/\<br\/\>/g; |
$xmlstring=~s/\<br\>/\<br\/\>/g; |
Line 112 sub convert_real {
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Line 103 sub convert_real {
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$errorstring.=&tth::ttherror(); |
$errorstring.=&tth::ttherror(); |
$xmlstring=~s-</font(\s*)>-</font>-g; |
$xmlstring=~s-</font(\s*)>-</font>-g; |
} |
} |
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$xmlstring=~s/^\s*\<br clear\=\"all\"/\<br/s; |
$xmlstring=~s/^\s*//; |
$xmlstring=~s/^\s*//; |
$xmlstring=~s/\s*$//; |
$xmlstring=~s/\s*$//; |
alarm(0); |
# |
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# \rightleftharpoons is not converted by tth but maps |
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# reasonably well to ⇔. If we get many more of these, |
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# we're going to need to have a translation sub. |
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# |
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my $lrharpoon = pack("U", 0x21cc); |
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$xmlstring=~s/\\rightleftharpoons/$lrharpoon/g; |
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&Apache::lonxml::end_alarm(); |
return ($xmlstring,$errorstring); |
return ($xmlstring,$errorstring); |
} |
} |
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sub converted { |
sub tth_converted { |
my $texstring=shift; |
my $texstring=shift; |
my $xmlstring='['.&mt('UNDISPLAYABLE').']'; |
my $xmlstring='['.&mt('UNDISPLAYABLE').']'; |
if ($Apache::lontexconvert::messedup) { |
if ($Apache::lontexconvert::messedup) { |
return '['.&mt('TeX unconverted due to previous errors').']'; |
return '['.&mt('TeX unconverted due to previous errors').']'; |
} |
} |
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$$texstring ='\\documentstyle{article}'.$$texstring; |
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eval(<<'ENDCONV'); |
eval(<<'ENDCONV'); |
($xmlstring,$errorstring)=&convert_real($texstring) |
($xmlstring,$errorstring)=&convert_real($texstring) |
ENDCONV |
ENDCONV |
Line 135 ENDCONV
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Line 137 ENDCONV
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$errorstring) { |
$errorstring) { |
&Apache::lonnet::logthis("Trying to kill myself"); |
&Apache::lonnet::logthis("Trying to kill myself"); |
$Apache::lontexconvert::messedup=1; |
$Apache::lontexconvert::messedup=1; |
my $request=Apache->request(); |
if (ref($Apache::lonxml::request)) { |
$request->child_terminate(); |
$Apache::lonxml::request->child_terminate(); |
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} else { |
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my $request; |
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eval { $request=Apache->request; }; |
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if (!$request) { |
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eval { $request=Apache2::RequestUtil->request; }; |
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} |
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if ($request) { |
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$request->child_terminate(); |
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} else { |
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&Apache::lonnet::logthis("Unable to find a request to do child_terminate on"); |
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} |
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} |
} |
} |
return $xmlstring; |
return $xmlstring; |
} |
} |
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# ====================================================================== Footer |
sub clean_out_math_mode { |
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my ($texstring)=@_; |
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$$texstring=~s/(?<!\\)\$//g; |
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$$texstring=~s/\\[\)\(\]\[]//g; |
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$$texstring=~s/\\ensuremath//g; |
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return ''; |
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} |
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sub displaystyle { |
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my ($texstring)=@_; |
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#has a $$ or \[ or \displaystyle in it, guessinng it's display mode |
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if ($$texstring=~/[^\\]\$\$/ || |
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$$texstring=~/\\\[/ || |
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$$texstring=~/\\displaystyle/) { return 1; } |
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return 0; |
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} |
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sub jsMath_converted { |
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my $texstring=shift; |
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my $tag='span'; |
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if (&displaystyle($texstring)) { $tag='div'; } |
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&clean_out_math_mode($texstring); |
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return &jsMath_header(). |
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'<'.$tag.' class="math">'.$$texstring.'</'.$tag.'>'; |
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} |
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{ |
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my @jsMath_sent_header; |
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sub jsMath_reset { |
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undef(@jsMath_sent_header); |
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} |
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sub jsMath_push { |
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push(@jsMath_sent_header,0); |
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} |
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sub jsMath_header { |
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if (!@jsMath_sent_header) { |
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&Apache::lonnet::logthis("mismatched calls of jsMath_header and jsMath_process"); |
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return ''; |
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} |
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return '' if $jsMath_sent_header[-1]; |
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$jsMath_sent_header[-1]=1; |
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return |
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'<script type="text/javascript"> |
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function NoFontMessage () {} |
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jsMath = {Parser: {prototype: {environments: {\'eqnarray*\' :[\'Array\',null,null,\'rcl\',[5/18,5/18],3,\'D\']}}}}; |
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</script>'."\n". |
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'<script type="text/javascript" src="/adm/jsMath/jsMath.js"></script>'."\n"; |
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} |
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sub jsMath_process { |
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my $state = pop(@jsMath_sent_header); |
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return '' if !$state; |
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return "\n". |
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'<script type="text/javascript">jsMath.Process()</script>'."\n"; |
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} |
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sub jsMath_state { |
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my ($level) = @_; |
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return $jsMath_sent_header[$level]; |
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} |
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} |
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sub tex_engine { |
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if (exists($env{'form.texengine'})) { |
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if ($env{'form.texengine'} ne '') { |
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return $env{'form.texengine'}; |
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} |
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} |
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if ($env{'request.course.id'} |
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&& exists($env{'course.'.$env{'request.course.id'}.'.texengine'})) { |
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return $env{'course.'.$env{'request.course.id'}.'.texengine'}; |
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} |
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if (exists($env{'environment.texengine'})) { |
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return $env{'environment.texengine'}; |
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} |
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return 'tth'; |
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} |
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sub init_math_support { |
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my ($inherit_jsmath) = @_; |
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&init_tth(); |
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&Apache::lontexconvert::jsMath_push(); |
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if (lc(&tex_engine()) eq 'jsmath' || |
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($inherit_jsmath && &jsMath_state(-2))) { |
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return &Apache::lontexconvert::jsMath_header(); |
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} |
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return; |
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} |
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sub mimetex_valign { |
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my ($esc_texstring)=@_; |
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my $valign = 0; |
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my $lonhost = $Apache::lonnet::perlvar{'lonHostID'}; |
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my $hostname = &Apache::lonnet::hostname($lonhost); |
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my $path = '/cgi-bin/mimetex.cgi?'.$esc_texstring; |
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my $socket; |
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&Apache::lonxml::start_alarm(); |
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my $socket = IO::Socket::INET->new(PeerAddr => $hostname, |
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PeerPort => 'http(80)', |
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Proto => 'tcp'); |
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if ($socket) { |
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my $headreq = "HEAD $path HTTP/1.0\r\n\r\n"; |
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print $socket $headreq; |
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while (<$socket>) { |
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if (/Vertical\-Align\:\s*?([\-\d]+)/) { |
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$valign = $1; |
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} |
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} |
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$socket->close(); |
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} |
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&Apache::lonxml::end_alarm(); |
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return $valign; |
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} |
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sub mimetex_converted { |
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my $texstring=shift; |
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# Alt-Argument for screen readers |
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my $alt_string=$$texstring; |
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$alt_string=~s/\"/\'\'/g; |
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sub footer { |
# Is this displaystyle? |
my $xmlstring=''; |
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if ($ENV{'request.state'} eq 'construct') { |
my $displaystyle=&displaystyle($texstring); |
$xmlstring.='<address>'.$errorstring.'</address>'; |
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} else { |
# Remove math environment delimiters |
&Apache::lonmsg::author_res_msg($ENV{'request.filename'},$errorstring); |
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} |
&clean_out_math_mode($texstring); |
# -------------------------------------------------------------------- End Body |
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$xmlstring.=&Apache::lonxml::xmlend(); |
if ($displaystyle) { |
return $xmlstring; |
$$texstring='\\displaystyle \\Large '.$$texstring; |
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} |
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my $esc_texstring = &uri_escape($$texstring); |
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my $valign = &mimetex_valign($esc_texstring); |
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my $result='<img src="/cgi-bin/mimetex.cgi?'.$esc_texstring.'" style="vertical-align:'.$valign.'px" alt="'.$alt_string.'" />'; |
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if ($displaystyle) { |
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$result='<center>'.$result.'</center>'; |
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} |
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return $result; |
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} |
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sub converted { |
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my ($string,$mode)=@_; |
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if ($mode eq '') { $mode = &tex_engine(); } |
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if ($mode =~ /tth/i) { |
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return &tth_converted($string); |
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} elsif ($mode =~ /jsmath/i) { |
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return &jsMath_converted($string); |
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} elsif ($mode =~ /mimetex/i) { |
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return &mimetex_converted($string); |
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} elsif ($mode =~ /raw/i) { |
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return $$string; |
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} |
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return &tth_converted($string); |
} |
} |
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# ------------------------------------------------------------ Message display |
# ------------------------------------------------------------ Message display |
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sub to_convert { |
sub to_convert { |
my ($string) = @_; |
my ($string) = @_; |
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&init_tth(); |
$string=~s/\<br\s*\/?\>/ /gs; |
$string=~s/\<br\s*\/?\>/ /gs; |
# $string=~s/\s/ /gs; |
# $string=~s/\s/ /gs; |
$string=&HTML::Entities::decode($string); |
$string=&HTML::Entities::decode($string); |
Line 167 sub to_convert {
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Line 322 sub to_convert {
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sub smiley { |
sub smiley { |
my $expression=shift; |
my $expression=shift; |
if ($ENV{'browser.imagesuppress'} eq 'on') { return $expression; } |
my %smileys=( |
my %smileys=('\:\-\)' => 'smiley', |
'\:\-*\)' => 'face-smile.png', |
'8\-\)' => 'coolsmile', |
'8\-\)' => 'face-cool.png', |
'8\-(I|\|)' => 'coolindiff', |
'8\-(I|\|)' => 'face-glasses.png', |
':\-(I|\|)' => 'neutral', |
'\:\-(I|\|)' => 'face-plain.png', |
'\:\-(o|O|\(\))' => 'shocked', |
'\:\-(o|O|\(\))' => 'face-surprise.png', |
':\-\(' => 'frowny', |
':\-\(' => 'face-sad.png', |
'\;\-\)' => 'wink', |
'\;\-\)' => 'face-wink.png', |
'\:\-P' => 'baeh', |
'\:\-(P|p)' => 'face-raspberry.png', |
'\:\-(\\\|\\/)' => 'hrrm', |
'\:\-(\\\|\\/)' => 'face-uncertain.png', |
'\:\-D' => 'bigsmile', |
'\:\-D' => 'face-smile-big.png', |
'\:\-C' => 'angry', |
'\:\-(C|\@)' => 'face-angry.png', |
'\:(\'|\`)\-\(' => 'cry', |
'\:(\'|\`)\-*\(' => 'face-crying.png', |
'\:\-(X|\#)' => 'lipsrsealed', |
'\:\-(X|x|\#)' => 'face-quiet.png', |
'\:\-S' => 'huh'); |
'\:\-(s|S)' => 'face-uncertain.png', |
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'\:\-\$' => 'face-embarrassed.png', |
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'\:\-\*' => 'face-kiss.png', |
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'\+O\(' => 'face-sick.png', |
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'(\<\;3|\(heart\))' => 'heart.png', |
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'\(rose\)' => 'rose.png', |
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'\(pizza\)' => 'food-pizza.png', |
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'\(cake\)' => 'food-cake.png', |
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'\(ninja\)' => 'face-ninja.png', |
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'\(pirate\)' => 'face-pirate.png', |
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'\((agree|yes)\)' => 'opinion-agree.png', |
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'\((disagree|nay)\)' => 'opinion-disagree.png', |
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'(o|O)\-\)' => 'face-angel.png', |
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); |
my $iconpath=$Apache::lonnet::perlvar{'lonIconsURL'}; |
my $iconpath=$Apache::lonnet::perlvar{'lonIconsURL'}; |
foreach (keys %smileys) { |
foreach my $smiley (keys(%smileys)) { |
$expression=~s/$_/\<img src="$iconpath\/$smileys{$_}.gif" \/\>/gs; |
$expression=~s/$smiley/\<img src="$iconpath\/$smileys{$smiley}" \/\>/gs; |
} |
} |
return $expression; |
return $expression; |
} |
} |
Line 192 sub smiley {
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Line 360 sub smiley {
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sub msgtexconverted { |
sub msgtexconverted { |
my ($message,$email) = @_; |
my ($message,$email) = @_; |
$errorstring=''; |
$errorstring=''; |
&init_tth(); |
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my $outmessage=''; |
my $outmessage=''; |
my $tex=0; |
my $tex=0; |
foreach (split(/(?:\<\;|\<)\/*m\s*(?:\>\;|\>)/i,$message)) { |
foreach my $fragment (split(/(?:\<\;|\<)\/*m\s*(?:\>\;|\>)/i,$message)) { |
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if ($tex) { |
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if ($email) { |
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$outmessage.='</pre><tt>'.&to_convert($fragment).'</tt><pre>'; |
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$tex=0; |
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} else { |
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$outmessage.=&to_convert($fragment); |
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$tex=0; |
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} |
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} else { |
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$outmessage.=&smiley($fragment); |
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$tex=1; |
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} |
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} |
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$message=$outmessage; $outmessage=''; $tex=0; |
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foreach my $fragment (split(/(?:\<\;|\<)\/*algebra\s*(?:\>\;|\>)/i, |
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$message)) { |
if ($tex) { |
if ($tex) { |
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my $algebra = &algebra($fragment, 'web', undef, undef, undef, undef, 'tth'); |
if ($email) { |
if ($email) { |
$outmessage.='</pre><tt>'.&to_convert($_).'</tt><pre>'; $tex=0; |
$outmessage.='</pre><tt>'.$algebra.'</tt><pre>'; |
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$tex=0; |
} else { |
} else { |
$outmessage.=&to_convert($_); $tex=0; |
$outmessage.=$algebra; |
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$tex=0; |
} |
} |
} else { |
} else { |
$outmessage.=&smiley($_); $tex=1; |
$outmessage.=$fragment; |
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$tex=1; |
} |
} |
} |
} |
if (wantarray) { |
if (wantarray) { |
Line 213 sub msgtexconverted {
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Line 400 sub msgtexconverted {
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} |
} |
} |
} |
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sub algebra { |
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use AlgParser; |
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my ($string,$target,$style,$parstack,$safeeval,$tth)=@_; |
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my $parser = new AlgParserWithImplicitExpand; |
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if ($tth eq 'tth') {&init_tth();} |
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$string=&prepare_algebra($string); |
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my $ret = $parser->parse($string); |
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my $result='['.&mt('Algebra unconverted due to previous errors').']'; |
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if ( ref($ret) ) { |
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#$parser->tostring(); |
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$parser->normalize(); |
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my $latex=$parser->tolatex(); |
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$latex=&postprocess_algebra($latex); |
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if ($style eq 'display') { |
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$latex='$$'.$latex.'$$x'; |
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} else { |
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# style is 'inline' |
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$latex='\\ensuremath{'.$latex.'}'; |
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} |
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if ($target eq 'web' || $target eq 'analyze') { |
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my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval); |
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$result = &converted(\$latex,$display); |
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# $result = &converted(\$latex); |
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} else { |
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$result = $latex; |
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} |
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} else { |
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&Apache::lonxml::error($parser->{'htmlerror'}); |
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} |
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} |
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sub prepare_algebra { |
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my ($string)=@_; |
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# makes the decision about what is a minus sign easier supposedly |
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$string =~ s/(\<\>|\<\=|\>\=[\=\>\<] *)-/$1 zeroplace -/g; |
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return $string; |
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} |
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sub postprocess_algebra { |
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my ($string)=@_; |
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# moodle had these and I don't know why, ignoring them for now |
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# $string =~s/\\fun/ /g; |
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# sqrt(3,4) means the 4 root of 3 |
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$string =~s/\\sqrt{([^,]+),([^\}]+)}/\\sqrt[$2]{$1}/gs; |
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# log(3,4) means the log base 4 of 3 |
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$string =~s/\\log\\left\((.+?),(.+?)\\right\)/\\log_{$2}\\left($1\\right)/gs; |
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# log(3,4) means the log base 4 of 3 |
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$string =~s/\\((?:sin|cos|tan|sec|csc|cot)(?:h)?)\\left\((.+?),(.+?)\\right\)/\\$1^{$3}\\left($2\\right)/gs; |
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# int(3,a,b) integral from a to b of 3 |
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$string =~s/\\int\\left\((.+?),(.+?),(.+?)\\right\)/\\int_{$2}^{$3}\\left($1\\right)/gs; |
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# int( ... dx) -> ... |
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$string =~s/\\int\\left\((.+?)d[a-z]\\right\)/$1/gs; |
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# |
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$string =~s/\\lim\\left\((.+?),(.+?),(.+?)\\right\)/\\lim_{$2\\to $3}$1/gs; |
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return $string; |
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} |
1; |
1; |
__END__ |
__END__ |
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=pod |
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=head1 NAME |
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Apache::lontexconvert; |
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=head1 SYNOPSIS |
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Access to tth/ttm |
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This is part of the LearningOnline Network with CAPA project |
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described at http://www.lon-capa.org. |
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=head1 SUBROUTINES |
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=over |
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=item init_tth() |
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|
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Header |
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|
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=item convert_real() |
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|
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we need this routine because &converted can get called from inside |
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of the safespace (through &xmlparse('<m>stuff</m>') which doesn't |
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allow the opcode for alarm, so we need to compile this before we get |
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into the safe space since opcode checks only occur at compile time |
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|
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=item tth_converted() |
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=item clean_out_math_mode() |
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=item displaystyle() |
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=item jsMath_converted() |
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=item tex_engine() |
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=item init_math_support() |
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=item mimetex_valign() |
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Makes a HEAD call to /cgi-bin/mimetex.cgi via IO:: to retrieve the |
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vertical alignment, before the subsequent call to mimetex_converted() |
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which generates the <img> tag and the corresponding image. |
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Input: 1. $esc_texstring (escaped TeX to be rendered by mimetex). |
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Output: 1. $valign - number of pixels: positive or negative integer |
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which will be included in <img> tag for mimetex image to |
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support vertical alignment of image within a line of text. |
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If a server is running SSL, and Apache rewrite rules are in place |
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to rewrite requests for http to https, modification will most likely |
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be needed for pass through for HEAD requests for /cgi-bin/mimetex.cgi. |
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Example rewrite rules which rewrite all http traffic to https, |
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except HEAD requests for /cgi-bin/mimetex.cgi are: |
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<IfModule mod_rewrite.c> |
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RewriteEngine On |
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RewriteLogLevel 0 |
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RewriteCond %{HTTPS} off |
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RewriteCond %{HTTP:Host} (.*) |
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RewriteCond %{REQUEST_METHOD} !HEAD |
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RewriteRule ^/(.*) https://%1/$1 [R=301,L] |
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RewriteCond %{HTTPS} off |
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RewriteCond %{HTTP:Host} (.*) |
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RewriteCond %{REQUEST_METHOD} HEAD |
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RewriteCond %{REQUEST_URI} !^/cgi-bin/mimetex.cgi |
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RewriteRule ^/(.*) https://%1/$1 [R=301,L] |
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</IfModule> |
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=item mimetex_converted() |
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=item converted() |
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=item to_convert() |
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message display |
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=item smiley() |
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??? |
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=item msgtexconverted() |
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=item algebra() |
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=item prepare_algebra() |
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=item postprocess_algebra() |
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=back |
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=cut |
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