--- loncom/xml/lontexconvert.pm 2006/05/17 22:08:08 1.73
+++ loncom/xml/lontexconvert.pm 2008/12/04 19:53:53 1.93
@@ -1,7 +1,7 @@
# The LearningOnline Network with CAPA
# TeX Conversion Module
#
-# $Id: lontexconvert.pm,v 1.73 2006/05/17 22:08:08 albertel Exp $
+# $Id: lontexconvert.pm,v 1.93 2008/12/04 19:53:53 riegler Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -45,24 +45,33 @@ use vars qw($errorstring);
#use Apache::lonxml();
use Apache::lonlocal;
use Apache::lonnet;
+use lib '/home/httpd/lib/perl/';
+use LONCAPA;
+use LWP::UserAgent;
+
# ====================================================================== Header
sub init_tth {
my $options=$env{'course.'.$env{'request.course.id'}.'.tthoptions'};
+ if ($options =~ /\S/) {
+ $options = ' '.$options;
+ } else {
+ undef($options);
+ }
if ($env{'browser.mathml'}) {
&tth::ttminit();
if ($env{'browser.unicode'}) {
- &tth::ttmoptions('-L -u1 '.$options);
+ &tth::ttmoptions('-L -u1'.$options);
} else {
- &tth::ttmoptions('-L -u0 '.$options);
+ &tth::ttmoptions('-L -u0'.$options);
}
} else {
&tth::tthinit();
if ($env{'browser.unicode'}) {
- &tth::tthoptions('-L -u1 '.$options);
+ &tth::tthoptions('-L -u1'.$options);
} else {
- &tth::tthoptions('-L -u0 '.$options);
+ &tth::tthoptions('-L -u0'.$options);
}
}
}
@@ -71,10 +80,7 @@ sub init_tth {
$Apache::lontexconvert::messedup=0;
-# we need this routine because &converted can get called from inside
-# of the safespace (through &xmlparse('<m>stuff</m>') which doesn't
-# allow the opcode for alarm, so we need to compile this before we get
-# into the safe space since opcode checks only occur at compile time
+
sub convert_real {
my ($texstring)=@_;
my ($xmlstring,$errorstring);
@@ -100,6 +106,14 @@ sub convert_real {
$xmlstring=~s/^\s*\<br clear\=\"all\"/\<br/s;
$xmlstring=~s/^\s*//;
$xmlstring=~s/\s*$//;
+ #
+ # \rightleftharpoons is not converted by tth but maps
+ # reasonably well to ⇔. If we get many more of these,
+ # we're going to need to have a translation sub.
+ #
+ my $lrharpoon = pack("U", 0x21cc);
+ $xmlstring=~s/\\rightleftharpoons/$lrharpoon/g;
+
&Apache::lonxml::end_alarm();
return ($xmlstring,$errorstring);
}
@@ -143,7 +157,7 @@ ENDCONV
sub clean_out_math_mode {
my ($texstring)=@_;
- $$texstring=~s/(?!\\)\$//g;
+ $$texstring=~s/(?<!\\)\$//g;
$$texstring=~s/\\[\)\(\]\[]//g;
$$texstring=~s/\\ensuremath//g;
return '';
@@ -168,35 +182,81 @@ sub jsMath_converted {
}
{
- my $jsMath_sent_header;
+ my @jsMath_sent_header;
sub jsMath_reset {
- $jsMath_sent_header=0;
+ undef(@jsMath_sent_header);
+ }
+ sub jsMath_push {
+ push(@jsMath_sent_header,0);
}
sub jsMath_header {
- return '' if $jsMath_sent_header;
- $jsMath_sent_header=1;
+ if (!@jsMath_sent_header) {
+ &Apache::lonnet::logthis("mismatched calls of jsMath_header and jsMath_process");
+ return '';
+ }
+ return '' if $jsMath_sent_header[-1];
+ $jsMath_sent_header[-1]=1;
return
'<script type="text/javascript">
function NoFontMessage () {}
+ jsMath = {Parser: {prototype: {environments: {\'eqnarray*\' :[\'Array\',null,null,\'rcl\',[5/18,5/18],3,\'D\']}}}};
</script>'."\n".
'<script type="text/javascript" src="/adm/jsMath/jsMath.js"></script>'."\n";
}
sub jsMath_process {
- return '' if !$jsMath_sent_header;
- return '<script type="text/javascript">jsMath.Process()</script>';
+ my $state = pop(@jsMath_sent_header);
+ return '' if !$state;
+ return "\n".
+ '<script type="text/javascript">jsMath.Process()</script>'."\n";
+ }
+ sub jsMath_state {
+ my ($level) = @_;
+ return $jsMath_sent_header[$level];
}
}
+sub tex_engine {
+ if (exists($env{'form.texengine'})) {
+ if ($env{'form.texengine'} ne '') {
+ return $env{'form.texengine'};
+ }
+ }
+ if ($env{'request.course.id'}
+ && exists($env{'course.'.$env{'request.course.id'}.'.texengine'})) {
+ return $env{'course.'.$env{'request.course.id'}.'.texengine'};
+ }
+ if (exists($env{'environment.texengine'})) {
+ return $env{'environment.texengine'};
+ }
+ return 'tth';
+}
+
sub init_math_support {
+ my ($inherit_jsmath) = @_;
&init_tth();
- &Apache::lontexconvert::jsMath_reset();
- if ($env{'environment.texengine'} eq 'jsMath' ||
- $env{'form.texengine'} eq 'jsMath' ) {
+ &Apache::lontexconvert::jsMath_push();
+ if (lc(&tex_engine()) eq 'jsmath' ||
+ ($inherit_jsmath && &jsMath_state(-2))) {
return &Apache::lontexconvert::jsMath_header();
}
return;
}
+sub mimetex_valign {
+ my ($texstring)=@_;
+ my $ua = LWP::UserAgent->new; #from the perldoc of LWP::UserAgent
+ $ua->timeout(10);
+ $ua->env_proxy;
+ #header without imagedata saved to response:
+ my $response = $ua->head('http://localhost.localdomain/cgi-bin/mimetex.cgi?'.$texstring);
+ if ($response->is_success) {
+ #get the valign-value:
+ return($response->headers->{'vertical-align'});}
+ else {
+ return(0); #if (error) than continue without valign
+ }
+}
+
sub mimetex_converted {
my $texstring=shift;
my $displaystyle=&displaystyle($texstring);
@@ -206,7 +266,8 @@ sub mimetex_converted {
if ($displaystyle) {
$$texstring='\\displaystyle \\Large '.$$texstring;
}
- my $result='<img src="/cgi-bin/mimetex.cgi?'.&Apache::lonnet::escape($$texstring).'" />';
+
+ my $result='<img src="/cgi-bin/mimetex.cgi?'.&escape($$texstring).'" style="vertical-align:'.&mimetex_valign($$texstring).'px" alt="$'.$$texstring.'$" />';
if ($displaystyle) {
$result='<center>'.$result.'</center>';
}
@@ -215,7 +276,7 @@ sub mimetex_converted {
sub converted {
my ($string,$mode)=@_;
- if ($mode eq '') { $mode=$env{'environment.texengine'}; }
+ if ($mode eq '') { $mode = &tex_engine(); }
if ($mode =~ /tth/i) {
return &tth_converted($string);
} elsif ($mode =~ /jsmath/i) {
@@ -254,8 +315,8 @@ sub smiley {
'\:\-(X|\#)' => 'lipsrsealed',
'\:\-S' => 'huh');
my $iconpath=$Apache::lonnet::perlvar{'lonIconsURL'};
- foreach (keys %smileys) {
- $expression=~s/$_/\<img src="$iconpath\/$smileys{$_}.gif" \/\>/gs;
+ foreach my $smiley (keys(%smileys)) {
+ $expression=~s/$smiley/\<img src="$iconpath\/$smileys{$smiley}.gif" \/\>/gs;
}
return $expression;
}
@@ -266,27 +327,34 @@ sub msgtexconverted {
&init_tth();
my $outmessage='';
my $tex=0;
- foreach (split(/(?:\<\;|\<)\/*m\s*(?:\>\;|\>)/i,$message)) {
+ foreach my $fragment (split(/(?:\<\;|\<)\/*m\s*(?:\>\;|\>)/i,$message)) {
if ($tex) {
if ($email) {
- $outmessage.='</pre><tt>'.&to_convert($_).'</tt><pre>'; $tex=0;
+ $outmessage.='</pre><tt>'.&to_convert($fragment).'</tt><pre>';
+ $tex=0;
} else {
- $outmessage.=&to_convert($_); $tex=0;
+ $outmessage.=&to_convert($fragment);
+ $tex=0;
}
} else {
- $outmessage.=&smiley($_); $tex=1;
+ $outmessage.=&smiley($fragment);
+ $tex=1;
}
}
$message=$outmessage; $outmessage=''; $tex=0;
- foreach (split(/(?:\<\;|\<)\/*algebra\s*(?:\>\;|\>)/i,$message)) {
+ foreach my $fragment (split(/(?:\<\;|\<)\/*algebra\s*(?:\>\;|\>)/i,
+ $message)) {
if ($tex) {
if ($email) {
- $outmessage.='</pre><tt>'.&algebra($_,'web').'</tt><pre>'; $tex=0;
+ $outmessage.='</pre><tt>'.&algebra($fragment,'web').'</tt><pre>';
+ $tex=0;
} else {
- $outmessage.=&algebra($_,'web'); $tex=0;
+ $outmessage.=&algebra($fragment,'web');
+ $tex=0;
}
} else {
- $outmessage.=$_; $tex=1;
+ $outmessage.=$fragment;
+ $tex=1;
}
}
if (wantarray) {
@@ -299,7 +367,7 @@ sub msgtexconverted {
sub algebra {
use AlgParser;
- my ($string,$target,$style)=@_;
+ my ($string,$target,$style,$parstack,$safeeval)=@_;
my $parser = new AlgParserWithImplicitExpand;
$string=&prepare_algebra($string);
my $ret = $parser->parse($string);
@@ -316,7 +384,9 @@ sub algebra {
$latex='\\ensuremath{'.$latex.'}';
}
if ($target eq 'web' || $target eq 'analyze') {
- $result = &converted(\$latex);
+ my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
+ $result = &converted(\$latex,$display);
+# $result = &converted(\$latex);
} else {
$result = $latex;
}
@@ -340,9 +410,6 @@ sub postprocess_algebra {
# moodle had these and I don't know why, ignoring them for now
# $string =~s/\\fun/ /g;
- # remove the extra () in the denominator of a \frac
- $string =~s/\\frac{(.+?)}{\\left\((.+?)\\right\)}/\\frac{$1}{$2}/gs;
-
# sqrt(3,4) means the 4 root of 3
$string =~s/\\sqrt{([^,]+),([^\}]+)}/\\sqrt[$2]{$1}/gs;
@@ -366,8 +433,78 @@ sub postprocess_algebra {
__END__
+=pod
+
+=head1 NAME
+
+Apache::lontexconvert;
+
+=head1 SYNOPSIS
+
+Access to tth/ttm
+
+This is part of the LearningOnline Network with CAPA project
+described at http://www.lon-capa.org.
+
+
+=head1 SUBROUTINES
+
+=over
+
+=item init_tth()
+
+Header
+
+=item convert_real()
+
+ we need this routine because &converted can get called from inside
+ of the safespace (through &xmlparse('<m>stuff</m>') which doesn't
+ allow the opcode for alarm, so we need to compile this before we get
+ into the safe space since opcode checks only occur at compile time
+
+=item tth_converted()
+
+
+=item clean_out_math_mode()
+
+
+=item displaystyle()
+
+
+=item jsMath_converted()
+
+
+=item tex_engine()
+
+
+=item init_math_support()
+
+
+=item mimetex_converted()
+
+
+=item converted()
+
+
+=item to_convert()
+
+message display
+
+=item smiley()
+
+???
+
+=item msgtexconverted()
+
+=item algebra()
+
+=item prepare_algebra()
+
+=item postprocess_algebra()
+=back
+=cut