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presentazione/plugin/math/math.js

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/**
* A plugin which enables rendering of math equations inside
* of reveal.js slides. Essentially a thin wrapper for MathJax.
*
* @author Hakim El Hattab
*/
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var RevealMath = window.RevealMath || (function(){
var config = Reveal.getConfig().math || {};
config.host = config.host || 'http://cdn.mathjax.org/mathjax/latest/MathJax.js';
config.mode = config.mode || 'TeX-AMS_HTML-full';
loadScript( config.host + '?config=' + config.mode, function() {
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MathJax.Hub.Config({
messageStyle: 'none',
tex2jax: { inlineMath: [['$','$'],['\\(','\\)']] }
});
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// Process any math inside of the current slide when navigating,
// this is needed since it's not possible to typeset equations
// within invisible elements (far future or past).
Reveal.addEventListener( 'slidechanged', function( event ) {
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// This will only typeset equations that have not yet been
// processed, as well as equations that have change since
// last being processed.
MathJax.Hub.Update( event.currentSlide );
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} );
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} );
function loadScript( url, callback ) {
var head = document.querySelector( 'head' );
var script = document.createElement( 'script' );
script.type = 'text/javascript';
script.src = url;
// Wrapper for callback to make sure it only fires once
var finish = function() {
if( typeof callback === 'function' ) {
callback.call();
callback = null;
}
}
script.onload = finish;
// IE
script.onreadystatechange = function() {
if ( this.readyState === 'loaded' ) {
finish.call();
}
}
// Normal browsers
head.appendChild( script );
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}
})();