Ghost + LaTex #24
Description
Ghost v0.7.0
LaTex - MathJax v2.6.1
1. Code Injection
Add following codes to {{ghost_foot}} tag:
<script type="text/x-mathjax-config">
MathJax.Hub.Config({
jax: ["input/TeX", "output/SVG"],
tex2jax: {inlineMath: [['$$', '$$']],displayMath : [['$$$$','$$$$']]},
});
</script>
<script src="//cdn.bootcss.com/mathjax/2.6.1/MathJax.js?config=TeX-AMS_HTML"></script>2. Escape a_i, b_i
$a_i, b_i$ like LaTex equations might be parsed into $a<em>i, b</em>i. We need a custom extension of Showdown to escape this transition:
cd $BLOG/core/server/models
# create new file
vim ghostLatex.js(function () {
var ghostLatex = function(){
return [
{
type : 'lang',
filter : function (text) {
return text.replace(/([^\\\\])~D([^$]+[^\\])~D/g, function(match, g1, g2) {
res = g1 + '~D' + g2.replace(/\\([^\d\w\s])/g, function (match, g) {
if (g == '\\')
g = '\\\\'
return '\\\\' + g;
}).replace(/_/g, '\\_').replace(/\*/g, '\\*') + '~D';
return res;
});
}
}
]
};
// Server-side export
if (typeof module !== 'undefined') {
module.exports = ghostLatex;
}
}());Edit $BLOG/core/server/models/post.js:
/* Add to the top */
var ghostLatex = require('./ghostLatex');
/*
Update
converter = new Showdown.converter({extensions: ['ghostgfm', 'footnotes', 'highlight']}),
to
*/
converter = new Showdown.converter({extensions: [ghostLatex, 'ghostgfm', 'footnotes', 'highlight']}),Only new posts will be affected after Ghost server is restarted, if you want to update all your published posts, you might need to edit and update them.