version 1.109, 2011/12/06 16:10:53
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version 1.116, 2014/06/18 06:48:03
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Line 50 use LONCAPA;
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Line 50 use LONCAPA;
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use URI::Escape; |
use URI::Escape; |
use IO::Socket::INET; |
use IO::Socket::INET; |
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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 $input; |
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} |
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# ====================================================================== Header |
# ====================================================================== Header |
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sub init_tth { |
sub init_tth { |
Line 106 sub convert_real {
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Line 178 sub convert_real {
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$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 428 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) { |
my $algebra = &algebra($fragment, 'web', undef, undef, undef, undef, 'tth'); |
my $algebra = &algebra($fragment, 'web', undef, undef, undef, 'tth'); |
if ($email) { |
if ($email) { |
$outmessage.='</pre><tt>'.$algebra.'</tt><pre>'; |
$outmessage.='</pre><tt>'.$algebra.'</tt><pre>'; |
$tex=0; |
$tex=0; |
Line 513 sub postprocess_algebra {
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Line 607 sub postprocess_algebra {
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$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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