version 1.80, 2006/10/24 01:28:47
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version 1.105, 2011/02/10 19:28:29
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Line 47 use Apache::lonlocal;
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Line 47 use Apache::lonlocal;
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use Apache::lonnet; |
use Apache::lonnet; |
use lib '/home/httpd/lib/perl/'; |
use lib '/home/httpd/lib/perl/'; |
use LONCAPA; |
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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Line 79 sub init_tth {
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Line 80 sub init_tth {
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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,$errorstring); |
Line 108 sub convert_real {
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Line 106 sub convert_real {
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$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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# |
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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/$lrharpoon/g; |
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&Apache::lonxml::end_alarm(); |
&Apache::lonxml::end_alarm(); |
return ($xmlstring,$errorstring); |
return ($xmlstring,$errorstring); |
} |
} |
Line 151 ENDCONV
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Line 157 ENDCONV
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sub clean_out_math_mode { |
sub clean_out_math_mode { |
my ($texstring)=@_; |
my ($texstring)=@_; |
$$texstring=~s/(?!\\)\$//g; |
$$texstring=~s/(?<!\\)\$//g; |
$$texstring=~s/\\[\)\(\]\[]//g; |
$$texstring=~s/\\[\)\(\]\[]//g; |
$$texstring=~s/\\ensuremath//g; |
$$texstring=~s/\\ensuremath//g; |
return ''; |
return ''; |
Line 200 sub jsMath_converted {
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Line 206 sub jsMath_converted {
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sub jsMath_process { |
sub jsMath_process { |
my $state = pop(@jsMath_sent_header); |
my $state = pop(@jsMath_sent_header); |
return '' if !$state; |
return '' if !$state; |
return '<script type="text/javascript">jsMath.Process()</script>'; |
return "\n". |
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'<script type="text/javascript">jsMath.Process()</script>'."\n"; |
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} |
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sub jsMath_state { |
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my ($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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if (exists($env{'environment.texengine'})) { |
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return $env{'environment.texengine'}; |
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} |
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return 'tth'; |
} |
} |
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sub init_math_support { |
sub init_math_support { |
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my ($inherit_jsmath) = @_; |
&init_tth(); |
&init_tth(); |
&Apache::lontexconvert::jsMath_push(); |
&Apache::lontexconvert::jsMath_push(); |
if ($env{'environment.texengine'} eq 'jsMath' || |
if (lc(&tex_engine()) eq 'jsmath' || |
$env{'form.texengine'} eq 'jsMath' ) { |
($inherit_jsmath && &jsMath_state(-2))) { |
return &Apache::lontexconvert::jsMath_header(); |
return &Apache::lontexconvert::jsMath_header(); |
} |
} |
return; |
return; |
} |
} |
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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 { |
sub mimetex_converted { |
my $texstring=shift; |
my $texstring=shift; |
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# Alt-Argument for screen readers |
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my $alt_string=$$texstring; |
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$alt_string=~s/\"/\'\'/g; |
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# Is this displaystyle? |
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my $displaystyle=&displaystyle($texstring); |
my $displaystyle=&displaystyle($texstring); |
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# Remove math environment delimiters |
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&clean_out_math_mode($texstring); |
&clean_out_math_mode($texstring); |
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if ($displaystyle) { |
if ($displaystyle) { |
$$texstring='\\displaystyle \\Large '.$$texstring; |
$$texstring='\\displaystyle \\Large '.$$texstring; |
} |
} |
my $result='<img src="/cgi-bin/mimetex.cgi?'.&escape($$texstring).'" />'; |
my $esc_texstring = &uri_escape($$texstring); |
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my $valign = &mimetex_valign($esc_texstring); |
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my $result='<img src="/cgi-bin/mimetex.cgi?'.$esc_texstring.'" style="vertical-align:'.$valign.'px" alt="'.$alt_string.'" />'; |
if ($displaystyle) { |
if ($displaystyle) { |
$result='<center>'.$result.'</center>'; |
$result='<center>'.$result.'</center>'; |
} |
} |
Line 232 sub mimetex_converted {
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Line 296 sub mimetex_converted {
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sub converted { |
sub converted { |
my ($string,$mode)=@_; |
my ($string,$mode)=@_; |
if ($mode eq '') { $mode=$env{'environment.texengine'}; } |
if ($mode eq '') { $mode = &tex_engine(); } |
if ($mode =~ /tth/i) { |
if ($mode =~ /tth/i) { |
return &tth_converted($string); |
return &tth_converted($string); |
} elsif ($mode =~ /jsmath/i) { |
} elsif ($mode =~ /jsmath/i) { |
return &jsMath_converted($string); |
return &jsMath_converted($string); |
} elsif ($mode =~ /mimetex/i) { |
} elsif ($mode =~ /mimetex/i) { |
return &mimetex_converted($string); |
return &mimetex_converted($string); |
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} elsif ($mode =~ /raw/i) { |
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return $$string; |
} |
} |
return &tth_converted($string); |
return &tth_converted($string); |
} |
} |
Line 247 sub converted {
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Line 313 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 255 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 my $smiley (keys(%smileys)) { |
foreach my $smiley (keys(%smileys)) { |
$expression=~s/$smiley/\<img src="$iconpath\/$smileys{$smiley}.gif" \/\>/gs; |
$expression=~s/$smiley/\<img src="$iconpath\/$smileys{$smiley}" \/\>/gs; |
} |
} |
return $expression; |
return $expression; |
} |
} |
Line 280 sub smiley {
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Line 360 sub smiley {
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sub msgtexconverted { |
sub msgtexconverted { |
my ($message,$email) = @_; |
my ($message,$email) = @_; |
$errorstring=''; |
$errorstring=''; |
&init_tth(); |
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my $outmessage=''; |
my $outmessage=''; |
my $tex=0; |
my $tex=0; |
foreach my $fragment (split(/(?:\<\;|\<)\/*m\s*(?:\>\;|\>)/i,$message)) { |
foreach my $fragment (split(/(?:\<\;|\<)\/*m\s*(?:\>\;|\>)/i,$message)) { |
Line 301 sub msgtexconverted {
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Line 380 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, 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; |
$tex=1; |
} |
} |
} |
} |
Line 322 sub msgtexconverted {
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Line 402 sub msgtexconverted {
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sub algebra { |
sub algebra { |
use AlgParser; |
use AlgParser; |
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my ($string,$target,$style,$parstack,$safeeval,$tth)=@_; |
my ($string,$target,$style)=@_; |
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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 $result='['.&mt('Algebra unconverted due to previous errors').']'; |
Line 340 sub algebra {
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Line 420 sub algebra {
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$latex='\\ensuremath{'.$latex.'}'; |
$latex='\\ensuremath{'.$latex.'}'; |
} |
} |
if ($target eq 'web' || $target eq 'analyze') { |
if ($target eq 'web' || $target eq 'analyze') { |
$result = &converted(\$latex); |
my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval); |
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$result = &converted(\$latex,$display); |
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# $result = &converted(\$latex); |
} else { |
} else { |
$result = $latex; |
$result = $latex; |
} |
} |
Line 387 sub postprocess_algebra {
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Line 469 sub postprocess_algebra {
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__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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Header |
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=item convert_real() |
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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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=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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