[=', '/\\{\\$(.*?)\\$\\}/', 'MathJaxInlineCallback');
function MathJaxEquationCallback($m) {
return ProcessLatexEquation(PSS($m[1]));
}
Markup('{$$', '<{$', '/\\{\\$\\$(.*?)\\$\$\\}/s', 'MathJaxEquationCallback');
# PmWiki rule for processing eqrefs.
function MathJaxLatexeqrefCallback($m) {
return ProcessEqref($m[1]);
}
Markup('latexeqref', '>{$$', '/\\\\eqref\\{([^\\}]+)\\}/', 'MathJaxLatexeqrefCallback');
# $MathJaxConfigJS is the MathJax configuration block.
global $MathJaxConfigJS;
SDV($MathJaxConfigJS, 'MathJax.Hub.Config({
extensions: [
"tex2jax.js",
"TeX/AMSmath.js",
"TeX/AMSsymbols.js"
],
jax: [
"input/TeX",
"output/HTML-CSS"
],
tex2jax: {
inlineMath: [ [ "{$", "$}" ] ],
displayMath: [ [ "{$$", "$$}" ] ]
}
});');
# $MathJaxUseCDN, if true, uses a CDN (content distribution network) to load
# MathJax from the cloud, making it unnecessary to install MathJax locally in
# your wiki.'
global $MathJaxUseCDN;
SDV($MathJaxUseCDN, false);
# $MathJaxCDNURL is the URL of the MathJax distribution from the CDN.
global $MathJaxCDNURL;
SDV($MathJaxCDNURL, "https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/latest.js?config=TeX-MML-AM_CHTML");
# Inject the JavaScript into .
global $HTMLHeaderFmt;
if ($MathJaxUseCDN == true) {
$HTMLHeaderFmt['MathJax'] =
'' . "\n" .
'';
} else {
$HTMLHeaderFmt['MathJax'] =
'';
}
# The graphic is available from
# http://www.pmichaud.com/pmwiki/pub/guiedit/math.gif .
SDV($GUIButtons['math'], array(1000, '{$ ', ' $}', '\\\\sqrt{n}',
'$GUIButtonDirUrlFmt/math.gif"$[Math formula (LaTeX/MimeTeX)]"'));
# The map from reference name to the equation number.
$mathjax_refarray = array();
# The current highest equation number.
$mathjax_cur_ref = 1;
# Process Latex DisplayEquations
#
# This handles equation cross-referencing, by extracting \labels and
# inserting \tag's for explicit numbering. MathJax will only handle
# one tag per equation, so this assign's the same number to all labels.
function ProcessLatexEquation($equation) {
global $mathjax_refarray, $mathjax_cur_ref;
# Find all \label tags (especially the label names).
preg_match_all('/\\\\label\\{(.*?)\\}/', $equation, $labelarray);
# Remove all labels from the equation source.
$eq = preg_replace('/\\\\label\\{.*?\\}/', '', $equation);
# Store the equation number corresponding to every label.
foreach ($labelarray[1] as $label) {
$mathjax_refarray[$label] = $mathjax_cur_ref;
}
# Write out final equation source (including a single \tag, and html
# anchor to it, if there were any labels found).
if(count($labelarray[1]) == 0) {
$retstr = Keep('{$$'.$eq.'$$}');
}
else {
$retstr = '[[#tag'.$mathjax_cur_ref.']]'.Keep('{$$ \\tag{'.$mathjax_cur_ref.'}'.$eq.'$$}');
$mathjax_cur_ref += 1;
}
return $retstr;
}
# Process \eqref's. This looks up the label to fetch the equation
# number, and returns the formatted number, with a link to the actual
# equation.
function ProcessEqref($label) {
global $mathjax_refarray;
if(array_key_exists($label, $mathjax_refarray)) {
$tagnum = $mathjax_refarray[$label];
return '([[#tag'.$tagnum.'|'.$tagnum.']])';
}
else {
return '(label '.$label.' undefined)';
}
}