version 1.35, 2004/03/09 15:53:18
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version 1.49, 2005/02/24 08:32:11
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Line 36
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Line 36
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# The C source of the Code may not be distributed by the Licensee |
# The C source of the Code may not be distributed by the Licensee |
# to any other parties under any circumstances. |
# to any other parties under any circumstances. |
# |
# |
# 05/29/00,05/30,10/11,10/20 Gerd Kortemeyer |
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# 5/4 Gerd Kortemeyer |
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package Apache::lontexconvert; |
package Apache::lontexconvert; |
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Line 76 sub header {
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Line 74 sub header {
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my $time=time; |
my $time=time; |
&init_tth(); |
&init_tth(); |
return &Apache::lonxml::xmlbegin(). |
return &Apache::lonxml::xmlbegin(). |
&Apache::lonxml::fontsettings(). |
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"\n<head>\n". |
"\n<head>\n". |
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&Apache::lonxml::fontsettings(). |
&Apache::lonmenu::registerurl(undef,'tex'). |
&Apache::lonmenu::registerurl(undef,'tex'). |
"\n</head>\n"; |
"\n</head>\n"; |
} |
} |
Line 85 sub header {
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Line 83 sub header {
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# ================================================================== Conversion |
# ================================================================== Conversion |
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$Apache::lontexconvert::messedup=0; |
$Apache::lontexconvert::messedup=0; |
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# we need this routine because &converted can get called from inside |
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# of the safespace (through &xmlparse('<m>stuff</m>') which doesn't |
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# allow the opcode for alarm, so we need to compile this before we get |
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# into the safe space since opcode checks only occur at compile time |
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sub convert_real { |
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my ($texstring)=@_; |
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my ($xmlstring,$errorstring); |
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local $SIG{SEGV}=sub { $Apache::lontexconvert::messedup=1; die; }; |
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local $SIG{ALRM}=sub { |
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&Apache::lonnet::logthis("ALRM"); |
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$xmlstring='['.&mt("TeX unconverted due to errors").']'; |
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$Apache::lontexconvert::messedup=1; |
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die &mt("TeX unconverted due to errors"); |
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}; |
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alarm($Apache::lonnet::perlvar{'lonScriptTimeout'}); |
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if ($ENV{'browser.mathml'}) { |
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$xmlstring=&tth::ttm($$texstring); |
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$xmlstring=~s/\<math\>/\<math xmlns=\"\&mathns\;\"\>/g; |
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$xmlstring=~s/\<br\>/\<br\/\>/g; |
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$xmlstring=~s/\<p\>/\<p\>\<\/p\>/g; |
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$errorstring.=&tth::ttmerror(); |
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} else { |
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$xmlstring=&tth::tth($$texstring); |
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$errorstring.=&tth::ttherror(); |
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$xmlstring=~s-</font(\s*)>-</font>-g; |
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} |
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$xmlstring=~s/^\s*\<br clear\=\"all\"/\<br/s; |
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$xmlstring=~s/^\s*//; |
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$xmlstring=~s/\s*$//; |
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alarm(0); |
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return ($xmlstring,$errorstring); |
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} |
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sub converted { |
sub converted { |
my $texstring=shift; |
my $texstring=shift; |
my $xmlstring='['.&mt('UNDISPLAYABLE').']'; |
my $xmlstring='['.&mt('UNDISPLAYABLE').']'; |
Line 92 sub converted {
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Line 124 sub converted {
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return '['.&mt('TeX unconverted due to previous errors').']'; |
return '['.&mt('TeX unconverted due to previous errors').']'; |
} |
} |
eval(<<'ENDCONV'); |
eval(<<'ENDCONV'); |
{ |
($xmlstring,$errorstring)=&convert_real($texstring) |
local $SIG{SEGV}=sub { $Apache::lontexconvert::messedup=1; die; }; |
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local $SIG{ALRM}=sub { |
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$xmlstring='['.&mt("TeX unconverted due to errors").']'; |
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$Apache::lontexconvert::messedup=1; |
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die &mt("TeX unconverted due to errors"); }; |
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alarm($Apache::lonnet::perlvar{'lonScriptTimeout'}); |
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if ($ENV{'browser.mathml'}) { |
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$xmlstring=&tth::ttm($$texstring); |
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$xmlstring=~s/\<math\>/\<math xmlns=\"\&mathns\;\"\>/g; |
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$xmlstring=~s/\<br\>/\<br\/\>/g; |
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$xmlstring=~s/\<p\>/\<p\>\<\/p\>/g; |
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$errorstring.=&tth::ttmerror(); |
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} else { |
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$xmlstring=&tth::tth($$texstring); |
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$errorstring.=&tth::ttherror(); |
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$xmlstring=~s-</font(\s*)>-</font>-g; |
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} |
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$xmlstring=~s/^\s*//; |
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$xmlstring=~s/\s*$//; |
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alarm(0); |
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} |
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ENDCONV |
ENDCONV |
if ($@) { |
if ($@) { |
$errorstring.=&mt("Evaluation Error: ").$@; |
$errorstring.=&mt("Evaluation Error: ").$@; |
$Apache::lontexconvert::messedup=1; |
$Apache::lontexconvert::messedup=1; |
} |
} |
if ($Apache::lontexconvert::messedup || &tth::tthmessedup()) { |
if ($Apache::lontexconvert::messedup || &tth::tthmessedup() || |
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$errorstring) { |
&Apache::lonnet::logthis("Trying to kill myself"); |
&Apache::lonnet::logthis("Trying to kill myself"); |
$Apache::lontexconvert::messedup=1; |
$Apache::lontexconvert::messedup=1; |
my $request=Apache->request(); |
my $request=Apache->request(); |
Line 177 sub smiley {
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Line 189 sub smiley {
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} |
} |
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sub msgtexconverted { |
sub msgtexconverted { |
my $message=shift; |
my ($message,$email) = @_; |
my $email=shift; |
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$errorstring=''; |
$errorstring=''; |
&init_tth(); |
&init_tth(); |
my $outmessage=''; |
my $outmessage=''; |
Line 201 sub msgtexconverted {
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Line 212 sub msgtexconverted {
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} |
} |
} |
} |
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sub algebra { |
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use AlgParser; |
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my ($string,$target)=@_; |
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my $parser = new AlgParserWithImplicitExpand; |
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$string=&prepare_algebra($string); |
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my $ret = $parser->parse($string); |
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my $result='['.&mt('Algebra unconverted due to previous errors').']'; |
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if ( ref($ret) ) { |
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$parser->tostring(); |
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$parser->normalize(); |
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my $latex=$parser->tolatex(); |
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$latex=&postprocess_algebra($latex); |
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$latex='$'.$latex.'$'; |
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if ($target eq 'web' || $target eq 'analyze') { |
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$result = &converted(\$latex); |
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} else { |
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$result = $latex; |
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} |
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} else { |
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&Apache::lonxml::error($parser->{'htmlerror'}); |
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} |
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} |
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sub prepare_algebra { |
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my ($string)=@_; |
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# change some multi character operators into single character operators |
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$string =~ s/<>/\#/g; |
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$string =~ s/<\=/\%/g; |
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$string =~ s/>\=/\!/g; |
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# makes the decision about what is a minus sign easier |
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$string =~ s/([\=\>\<\%\!\#] *)-/$1 zeroplace -/g; |
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return $string; |
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} |
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sub postprocess_algebra { |
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my ($string)=@_; |
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# exapnd out some operators |
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$string =~ s/\#/\\not= /g; |
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$string =~ s/\%/\\leq /g; |
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$string =~ s/\!/\\geq /g; |
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return $string; |
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} |
1; |
1; |
__END__ |
__END__ |
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