version 1.100, 2009/12/22 05:08:04
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version 1.116, 2014/06/18 06:48:03
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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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# |
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# Table of substitutions to unicode characters. |
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# |
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my %unicode_harpoons = ( |
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'\rightleftharpoons' => 0x21cc, |
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); |
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my %unicode_translations = ( |
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# Brackets - unicode for browsers/OS which support it. |
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'' => 0x23a1, |
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'' => 0x23a2, |
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'' => 0x23a3, |
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'' => 0x23a4, |
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'' => 0x23a5, |
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'' => 0x23a6, |
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# Parens - unicode for browsers/OS which support it |
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'' => 0x239b, |
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'' => 0x239c, |
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'' => 0x239d, |
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'' => 0x239e, |
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'' => 0x239f, |
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'' => 0x23a0, |
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); |
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my %ascii_8bit_translations = ( |
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# Brackets - pure 8-bit ascii ugliness for browsers/OS which can't handle unicode |
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'' => 0x5b, |
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'' => 0x5b, # '[' |
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'' => 0x5b, |
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'' => 0x5d, # ']' |
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'' => 0x5d, |
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'' => 0x5d, |
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# Parens - pure 8-bit ascii ugliness for browsers/OS which can't handle unicode |
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'' => 0x28, |
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'' => 0x28, # '(' |
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'' => 0x28, |
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'' => 0x29, |
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'' => 0x29, # '(' |
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'' => 0x29, |
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); |
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## |
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# Utility to convert elements of a string to unicode: |
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# |
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# @param input - Input string |
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# @param pattern - Pattern to convert |
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# @param unicode - Unicode to substitute for pattern. |
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# |
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# @return string - resulting string. |
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# |
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sub unicode_subst { |
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my ($input, $pattern, $unicode) = @_; |
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my $char = pack('U', $unicode); |
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$input =~ s/$pattern/$char/g; |
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return $input; |
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} |
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# ====================================================================== Header |
# ====================================================================== Header |
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Line 107 sub convert_real {
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Line 178 sub convert_real {
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$xmlstring=~s/^\s*\<br clear\=\"all\"/\<br/s; |
$xmlstring=~s/^\s*\<br clear\=\"all\"/\<br/s; |
$xmlstring=~s/^\s*//; |
$xmlstring=~s/^\s*//; |
$xmlstring=~s/\s*$//; |
$xmlstring=~s/\s*$//; |
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&Apache::lonxml::end_alarm(); |
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# |
# |
# \rightleftharpoons is not converted by tth but maps |
# Several strings produced by tth require |
# reasonably well to ⇔. If we get many more of these, |
# transliteration -> unicode equivalents to render reliably |
# we're going to need to have a translation sub. |
# in browsers. %unicode_translations and %unicode_harpoons are tables of |
# |
# string->substitution which we now apply. (%ascii_8bit_translations used |
my $lrharpoon = pack("U", 0x21cc); |
# instead for Windows XP and mobile devices. |
$xmlstring=~s/\\rightleftharpoons/$lrharpoon/g; |
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my $use_ascii; |
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if ($env{'browser.os'} eq 'win') { |
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if (($env{'browser.osversion'}) && ($env{'browser.osversion'} < 6.0)) { |
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$use_ascii = 1; |
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} |
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} |
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if ($env{'browser.mobile'}) { |
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$use_ascii = 1; |
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} |
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foreach my $pattern (keys(%unicode_translations)) { |
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my $unicode = $unicode_translations{$pattern}; |
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if ($use_ascii) { |
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$unicode = $ascii_8bit_translations{$pattern}; |
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} |
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$xmlstring = &unicode_subst($xmlstring, $pattern, $unicode); |
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} |
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foreach my $pattern (keys(%unicode_harpoons)) { |
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$xmlstring = &unicode_subst($xmlstring, $pattern, $unicode_harpoons{$pattern}); |
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} |
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&Apache::lonxml::end_alarm(); |
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return ($xmlstring,$errorstring); |
return ($xmlstring,$errorstring); |
} |
} |
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Line 166 sub clean_out_math_mode {
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Line 259 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 $tag='span'; |
Line 240 sub init_math_support {
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Line 376 sub init_math_support {
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($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 $headreq; |
Line 269 sub mimetex_valign {
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Line 401 sub mimetex_valign {
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$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 429 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 $result; |
} |
} |
Line 314 sub converted {
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Line 441 sub converted {
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return &tth_converted($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 ($mode =~ /raw/i) { |
Line 326 sub converted {
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Line 455 sub converted {
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sub to_convert { |
sub to_convert { |
my ($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 334 sub to_convert {
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Line 464 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; } |
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my %smileys=( |
my %smileys=( |
'\:\-*\)' => 'face-smile.png', |
'\:\-*\)' => 'face-smile.png', |
'8\-\)' => 'face-cool.png', |
'8\-\)' => 'face-cool.png', |
'8\-(I|\|)' => 'face-glasses.png', |
'8\-(I|\|)' => 'face-glasses.png', |
':\-*(I|\|)' => 'face-plain.png', |
'\:\-(I|\|)' => 'face-plain.png', |
'\:\-(o|O|\(\))' => 'face-surprise.png', |
'\:\-(o|O|\(\))' => 'face-surprise.png', |
':\-*\(' => 'face-sad.png', |
':\-\(' => 'face-sad.png', |
'\;\-*\)' => 'face-wink.png', |
'\;\-\)' => 'face-wink.png', |
'\:\-*(P|p)' => 'face-raspberry.png', |
'\:\-(P|p)' => 'face-raspberry.png', |
'\:\-(\\\|\\/)' => 'face-uncertain.png', |
'\:\-(\\\|\\/)' => 'face-uncertain.png', |
'\:\-*D' => 'face-smile-big.png', |
'\:\-D' => 'face-smile-big.png', |
'\:\-*(C|\@)' => 'face-angry.png', |
'\:\-(C|\@)' => 'face-angry.png', |
'\:(\'|\`)\-*\(' => 'face-crying.png', |
'\:(\'|\`)\-*\(' => 'face-crying.png', |
'\:\-*(X|x|\#)' => 'face-quiet.png', |
'\:\-(X|x|\#)' => 'face-quiet.png', |
'\:\-*(s|S)' => 'face-uncertain.png', |
'\:\-(s|S)' => 'face-uncertain.png', |
'\:\-*\$' => 'face-embarrassed.png', |
'\:\-\$' => 'face-embarrassed.png', |
'\:\-*\*' => 'face-kiss.png', |
'\:\-\*' => 'face-kiss.png', |
'\+O\(' => 'face-sick.png', |
'\+O\(' => 'face-sick.png', |
'(\<\;3|\(heart\))' => 'heart.png', |
'(\<\;3|\(heart\))' => 'heart.png', |
'\(rose\)' => 'rose.png', |
'\(rose\)' => 'rose.png', |
Line 361 sub smiley {
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Line 490 sub smiley {
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'\(pirate\)' => 'face-pirate.png', |
'\(pirate\)' => 'face-pirate.png', |
'\((agree|yes)\)' => 'opinion-agree.png', |
'\((agree|yes)\)' => 'opinion-agree.png', |
'\((disagree|nay)\)' => 'opinion-disagree.png', |
'\((disagree|nay)\)' => 'opinion-disagree.png', |
'(o|O)\-*\)' => 'face-angel.png', |
'(o|O)\-\)' => 'face-angel.png', |
); |
); |
my $iconpath=$Apache::lonnet::perlvar{'lonIconsURL'}; |
my $iconpath=$Apache::lonnet::perlvar{'lonIconsURL'}; |
foreach my $smiley (keys(%smileys)) { |
foreach my $smiley (keys(%smileys)) { |
Line 373 sub smiley {
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Line 502 sub smiley {
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sub msgtexconverted { |
sub msgtexconverted { |
my ($message,$email) = @_; |
my ($message,$email) = @_; |
$errorstring=''; |
$errorstring=''; |
&init_tth(); |
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my $outmessage=''; |
my $outmessage=''; |
my $tex=0; |
my $tex=0; |
foreach my $fragment (split(/(?:\<\;|\<)\/*m\s*(?:\>\;|\>)/i,$message)) { |
foreach my $fragment (split(/(?:\<\;|\<)\/*m\s*(?:\>\;|\>)/i,$message)) { |
Line 394 sub msgtexconverted {
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Line 522 sub msgtexconverted {
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foreach my $fragment (split(/(?:\<\;|\<)\/*algebra\s*(?:\>\;|\>)/i, |
foreach my $fragment (split(/(?:\<\;|\<)\/*algebra\s*(?:\>\;|\>)/i, |
$message)) { |
$message)) { |
if ($tex) { |
if ($tex) { |
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my $algebra = &algebra($fragment, 'web', undef, undef, undef, 'tth'); |
if ($email) { |
if ($email) { |
$outmessage.='</pre><tt>'.&algebra($fragment,'web').'</tt><pre>'; |
$outmessage.='</pre><tt>'.$algebra.'</tt><pre>'; |
$tex=0; |
$tex=0; |
} else { |
} else { |
$outmessage.=&algebra($fragment,'web'); |
$outmessage.=$algebra; |
$tex=0; |
$tex=0; |
} |
} |
} else { |
} else { |
$outmessage.=$fragment; |
$outmessage.=$fragment; |
$tex=1; |
$tex=1; |
} |
} |
} |
} |
Line 415 sub msgtexconverted {
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Line 544 sub msgtexconverted {
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sub algebra { |
sub algebra { |
use AlgParser; |
use AlgParser; |
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my ($string,$target,$style,$parstack,$safeeval,$tth)=@_; |
my ($string,$target,$style,$parstack,$safeeval)=@_; |
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my $parser = new AlgParserWithImplicitExpand; |
my $parser = new AlgParserWithImplicitExpand; |
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if ($tth eq 'tth') {&init_tth();} |
$string=&prepare_algebra($string); |
$string=&prepare_algebra($string); |
my $ret = $parser->parse($string); |
my $ret = $parser->parse($string); |
my $result='['.&mt('Algebra unconverted due to previous errors').']'; |
my $result='['.&mt('Algebra unconverted due to previous errors').']'; |
Line 478 sub postprocess_algebra {
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Line 607 sub postprocess_algebra {
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$string =~s/\\lim\\left\((.+?),(.+?),(.+?)\\right\)/\\lim_{$2\\to $3}$1/gs; |
$string =~s/\\lim\\left\((.+?),(.+?),(.+?)\\right\)/\\lim_{$2\\to $3}$1/gs; |
return $string; |
return $string; |
} |
} |
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1; |
1; |
__END__ |
__END__ |
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Line 522 Header
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Line 653 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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