version 1.104, 2010/06/10 15:54:06
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version 1.109, 2011/12/06 16:10:53
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Line 49 use lib '/home/httpd/lib/perl/';
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Line 49 use lib '/home/httpd/lib/perl/';
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use LONCAPA; |
use LONCAPA; |
use URI::Escape; |
use URI::Escape; |
use IO::Socket::INET; |
use IO::Socket::INET; |
use IO::Socket::SSL; |
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# ====================================================================== Header |
# ====================================================================== Header |
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Line 166 sub clean_out_math_mode {
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Line 165 sub clean_out_math_mode {
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sub displaystyle { |
sub displaystyle { |
my ($texstring)=@_; |
my ($texstring)=@_; |
#has a $$ or \[ or \displaystyle in it, guessinng it's display mode |
#has a $$ or \[ or \displaystyle or eqnarray in it, guessinng it's display mode |
if ($$texstring=~/[^\\]\$\$/ || |
if ($$texstring=~/[^\\]\$\$/ || |
$$texstring=~/\\\[/ || |
$$texstring=~/\\\[/ || |
$$texstring=~/\\displaystyle/) { return 1; } |
$$texstring=~/\\displaystyle/ || |
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$$texstring=~/eqnarray/ |
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) { return 1; } |
return 0; |
return 0; |
} |
} |
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sub MathJax_converted { |
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my $texstring=shift; |
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my $tag='math/tex;'; |
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if (&displaystyle($texstring)) { $tag='math/tex; mode=display'; } |
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&clean_out_math_mode($texstring); |
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return &MathJax_header(). |
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'<script type="'.$tag.'">'.$$texstring.'</script>'; |
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} |
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{ |
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#Relies heavily on the previous jsMath installation |
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my @MathJax_sent_header; |
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sub MathJax_reset { |
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undef(@MathJax_sent_header); |
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} |
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sub MathJax_push { |
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push(@MathJax_sent_header,0); |
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} |
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sub MathJax_header { |
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if (!@MathJax_sent_header) { |
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&Apache::lonnet::logthis("mismatched calls of MathJax_header and MathJax_process"); |
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return ''; |
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} |
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return '' if $MathJax_sent_header[-1]; |
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$MathJax_sent_header[-1]=1; |
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return |
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'<script type="text/javascript" src="/adm/MathJax/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>'."\n"; |
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} |
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#sub MathJax_process { |
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# my $state = pop(@MathJax_sent_header); |
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# return '' if !$state; |
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# return "\n". |
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# '<script type="text/javascript">MathJax.Process()</script>'."\n"; |
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#} |
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#sub MathJax_state { |
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# my ($level) = @_; |
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# return $MathJax_sent_header[$level]; |
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#} |
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} |
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sub jsMath_converted { |
sub jsMath_converted { |
my $texstring=shift; |
my $texstring=shift; |
my $tag='span'; |
my $tag='span'; |
Line 240 sub init_math_support {
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Line 282 sub init_math_support {
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($inherit_jsmath && &jsMath_state(-2))) { |
($inherit_jsmath && &jsMath_state(-2))) { |
return &Apache::lontexconvert::jsMath_header(); |
return &Apache::lontexconvert::jsMath_header(); |
} |
} |
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&Apache::lontexconvert::MathJax_push(); |
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if (lc(&tex_engine()) eq 'mathjax') { # || |
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#($inherit_jsmath && &jsMath_state(-2))) { |
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return &Apache::lontexconvert::MathJax_header(); |
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} |
return; |
return; |
} |
} |
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sub mimetex_valign { |
sub mimetex_valign { |
my ($esc_texstring)=@_; |
my ($esc_texstring)=@_; |
my $valign = 0; |
my $valign = 0; |
my $lonhost = $Apache::lonnet::perlvar{'lonHostID'}; |
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my $hostname = &Apache::lonnet::hostname($lonhost); |
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my $protocol = $Apache::lonnet::protocol{$lonhost}; |
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my $path = '/cgi-bin/mimetex.cgi?'.$esc_texstring; |
my $path = '/cgi-bin/mimetex.cgi?'.$esc_texstring; |
my $socket; |
my $socket; |
&Apache::lonxml::start_alarm(); |
&Apache::lonxml::start_alarm(); |
if ($protocol eq 'https') { |
$socket = IO::Socket::INET->new(PeerAddr => 'localhost', |
$socket = IO::Socket::SSL->new(PeerAddr => $hostname, |
PeerPort => 'http(80)', |
PeerPort => 'https(443)', |
Proto => 'tcp'); |
Proto => 'tcp'); |
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} else { |
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$socket = IO::Socket::INET->new(PeerAddr => $hostname, |
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PeerPort => 'http(80)', |
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Proto => 'tcp'); |
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} |
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if ($socket) { |
if ($socket) { |
my $headreq = "HEAD $path HTTP/1.0\r\n\r\n"; |
my $headreq = "HEAD $path HTTP/1.0\r\n\r\n"; |
print $socket $headreq; |
print $socket $headreq; |
Line 269 sub mimetex_valign {
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Line 307 sub mimetex_valign {
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$valign = $1; |
$valign = $1; |
} |
} |
} |
} |
if ($protocol eq 'https') { |
$socket->close(); |
$socket->close(SSL_no_shutdown => 1, |
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SSL_ctx_free => 1); |
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} else { |
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$socket->close(); |
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} |
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} |
} |
&Apache::lonxml::end_alarm(); |
&Apache::lonxml::end_alarm(); |
return $valign; |
return $valign; |
Line 302 sub mimetex_converted {
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Line 335 sub mimetex_converted {
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my $valign = &mimetex_valign($esc_texstring); |
my $valign = &mimetex_valign($esc_texstring); |
my $result='<img src="/cgi-bin/mimetex.cgi?'.$esc_texstring.'" style="vertical-align:'.$valign.'px" alt="'.$alt_string.'" />'; |
my $result='<img src="/cgi-bin/mimetex.cgi?'.$esc_texstring.'" style="vertical-align:'.$valign.'px" alt="'.$alt_string.'" />'; |
if ($displaystyle) { |
if ($displaystyle) { |
$result='<center>'.$result.'</center>'; |
$result='<div style="text-align:center">'.$result.'</div>'; |
} |
} |
return $result; |
return $result; |
} |
} |
Line 314 sub converted {
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Line 347 sub converted {
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return &tth_converted($string); |
return &tth_converted($string); |
} elsif ($mode =~ /jsmath/i) { |
} elsif ($mode =~ /jsmath/i) { |
return &jsMath_converted($string); |
return &jsMath_converted($string); |
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} elsif ($mode =~ /mathjax/i) { |
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return &MathJax_converted($string); |
} elsif ($mode =~ /mimetex/i) { |
} elsif ($mode =~ /mimetex/i) { |
return &mimetex_converted($string); |
return &mimetex_converted($string); |
} elsif ($mode =~ /raw/i) { |
} elsif ($mode =~ /raw/i) { |
Line 522 Header
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Line 557 Header
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=item jsMath_converted() |
=item jsMath_converted() |
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=item MathJax_converted() |
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- Mimics the jsMath functionality |
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=item tex_engine() |
=item tex_engine() |
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=item init_math_support() |
=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() |
=item mimetex_converted() |
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