Replace local library by CDN library

This was necessary since the library is loading other resources. As the loading
process in the extension is not designed for that, it was necessary to use the
library from a CDN.

extension.php

@@ -1,6 +1,12 @@
 <?php
 
 class LatexSupportExtension extends Minz_Extension {
+    private const MATHJAX_URL = 'https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js';
+
+    protected array $csp_policies = [
+        'default-src' => 'https://cdn.jsdelivr.net',
+    ];
+
     public function init() {
         $this->loadMathjax();
         $this->registerHook('entry_before_display', array($this, 'sanitize'));
@@ -9,22 +15,21 @@ public function init() {
     private function loadMathjax() {
         $config = 'mathjax-config.js';
         Minz_View::appendScript($this->getFileUrl($config, 'js'));
-        $lib = 'mathjax/tex-chtml.js';
-        Minz_View::appendScript($this->getFileUrl($lib, 'js'));
+        Minz_View::appendScript(self::MATHJAX_URL);
     }
 
     public function sanitize($entry) {
-        $content = str_replace(array(
+        $content = str_replace([
             '\\left⌊',
             '\\right⌋',
             '\\Complex',
             '\\Reals'
-        ), array(
+        ], [
             '\\left\\lfloor',
             '\\right\\rfloor',
             '\mathbb{C}',
             '\mathbb{R}',
-        ), $entry->content());
+        ], $entry->content());
 
         $entry->_content($content);
 

metadata.json

@@ -2,7 +2,7 @@
 	"name": "LaTeX support",
 	"author": "Alexis Degrugillier",
 	"description": "Add support for LaTeX notation rendering",
-	"version": "0.1.4",
+	"version": "0.1.5",
 	"entrypoint": "LatexSupport",
 	"type": "user"
 }

static/mathjax-config.js

@@ -1,4 +1,3 @@
-// https://github.com/mathjax/MathJax/releases/tag/3.0.5
 window.MathJax = {
   tex: {
     inlineMath: [['$', '$'], ['\\(', '\\)']]