'.$result.'
';
}
return $result;
}
sub converted {
- if ($env{'environment.texengine'} eq 'tth') {
- return &tth_converted;
- } elsif ($env{'environment.texengine'} eq 'jsMath') {
- return &jsMath_converted;
- } elsif ($env{'environment.texengine'} eq 'mimetex') {
- return &mimetex_converted;
- }
- return &tth_converted;
-}
-
-# ====================================================================== Footer
-
-sub footer {
- my $xmlstring='';
- if ($env{'request.state'} eq 'construct') {
- $xmlstring.=''.$errorstring.'';
- } else {
- &Apache::lonmsg::author_res_msg($env{'request.filename'},$errorstring);
- }
-# -------------------------------------------------------------------- End Body
- $xmlstring.=&Apache::lonxml::xmlend();
- return $xmlstring;
+ my ($string,$mode)=@_;
+ if ($mode eq '') { $mode = &tex_engine(); }
+ if ($mode =~ /tth/i) {
+ return &tth_converted($string);
+ } elsif ($mode =~ /jsmath/i) {
+ return &MathJax_converted($string);
+ } elsif ($mode =~ /mathjax/i) {
+ return &MathJax_converted($string);
+ } elsif ($mode =~ /mimetex/i) {
+ return &mimetex_converted($string);
+ } elsif ($mode =~ /raw/i) {
+ return $$string;
+ }
+ return &tth_converted($string);
}
# ------------------------------------------------------------ Message display
sub to_convert {
my ($string) = @_;
+ &init_tth();
$string=~s/\
/gs;
+ foreach my $smiley (keys(%smileys)) {
+ $expression=~s/$smiley/\'; $tex=0; + $outmessage.=''.&to_convert($fragment).'
';
+ $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) {
+ my $algebra = &algebra($fragment, 'web', undef, undef, undef, 'tth');
if ($email) {
- $outmessage.=''.&algebra($_,'web').''; $tex=0; + $outmessage.=''.$algebra.'
';
+ $tex=0;
} else {
- $outmessage.=&algebra($_,'web'); $tex=0;
+ $outmessage.=$algebra;
+ $tex=0;
}
} else {
- $outmessage.=$_; $tex=1;
+ $outmessage.=$fragment;
+ $tex=1;
}
}
if (wantarray) {
@@ -281,9 +516,9 @@ sub msgtexconverted {
sub algebra {
use AlgParser;
-
- my ($string,$target,$style)=@_;
+ my ($string,$target,$style,$parstack,$safeeval,$tth)=@_;
my $parser = new AlgParserWithImplicitExpand;
+ if ($tth eq 'tth') {&init_tth();}
$string=&prepare_algebra($string);
my $ret = $parser->parse($string);
my $result='['.&mt('Algebra unconverted due to previous errors').']';
@@ -299,7 +534,9 @@ 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;
}
@@ -323,11 +560,8 @@ 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;
+ $string =~s/\\sqrt\{([^,]+),([^\}]+)}/\\sqrt[$2]{$1}/gs;
# log(3,4) means the log base 4 of 3
$string =~s/\\log\\left\((.+?),(.+?)\\right\)/\\log_{$2}\\left($1\\right)/gs;
@@ -345,12 +579,115 @@ sub postprocess_algebra {
$string =~s/\\lim\\left\((.+?),(.+?),(.+?)\\right\)/\\lim_{$2\\to $3}$1/gs;
return $string;
}
+
+
1;
__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('stuff ') 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 MathJax_converted()
+
+=item tex_engine()
+
+=item init_math_support()
+
+=item mimetex_valign()
+
+ Makes a HEAD call to /cgi-bin/mimetex.cgi via IO:: to retrieve the
+ vertical alignment, before the subsequent call to mimetex_converted()
+ which generates the ![]()
tag and the corresponding image.
+
+ Input: 1. $esc_texstring (escaped TeX to be rendered by mimetex).
+ Output: 1. $valign - number of pixels: positive or negative integer
+ which will be included in ![]()
tag for mimetex image to
+ support vertical alignment of image within a line of text.
+
+ If a server is running SSL, and Apache rewrite rules are in place
+ to rewrite requests for http to https, modification will most likely
+ be needed for pass through for HEAD requests for /cgi-bin/mimetex.cgi.
+
+ Example rewrite rules which rewrite all http traffic to https,
+ except HEAD requests for /cgi-bin/mimetex.cgi are:
+
+
+ RewriteEngine On
+ RewriteLogLevel 0
+
+ RewriteCond %{HTTPS} off
+ RewriteCond %{HTTP:Host} (.*)
+ RewriteCond %{REQUEST_METHOD} !HEAD
+ RewriteRule ^/(.*) https://%1/$1 [R=301,L]
+
+ RewriteCond %{HTTPS} off
+ RewriteCond %{HTTP:Host} (.*)
+ RewriteCond %{REQUEST_METHOD} HEAD
+ RewriteCond %{REQUEST_URI} !^/cgi-bin/mimetex.cgi
+ RewriteRule ^/(.*) https://%1/$1 [R=301,L]
+
+
+=item mimetex_converted()
+
+
+=item converted()
+
+
+=item to_convert()
+
+message display
+
+=item smiley()
+
+???
+
+=item msgtexconverted()
+
+=item algebra()
+
+=item prepare_algebra()
+
+=item postprocess_algebra()
+=back
+=cut