Add options for zoom and accessibility (#6)

* Add files via upload

* Add files via upload

* Add files via upload

* Add files via upload

* Add files via upload

* Add files via upload

assets/javascripts/initializers/discourse-math.js.es6

@@ -2,18 +2,27 @@ import { withPluginApi } from 'discourse/lib/plugin-api';
 import loadScript from 'discourse/lib/load-script';
 
 let initializedMathJax = false;
+let zoom_on_hover, enable_accessibility;
 
 function initMathJax() {
   if (initializedMathJax) { return; }
 
-  window.MathJax = {
+  var extensions = ["toMathML.js", "Safe.js"];
+  if(enable_accessibility) {
+    extensions.push("[a11y]/accessibility-menu.js")
+  }
+  var settings = {
     jax: ['input/TeX', 'input/AsciiMath', 'input/MathML', 'output/CommonHTML'],
     TeX: {extensions: ["AMSmath.js", "AMSsymbols.js", "autoload-all.js"]},
-    extensions: ["toMathML.js"],
+    extensions: extensions,
     showProcessingMessages: false,
     root: '/plugins/discourse-math/mathjax'
-  };
-
+  }
+  if(zoom_on_hover) {
+    settings.menuSettings = {zoom: "Hover"};
+    settings.MathEvents = {hover: 750};
+  }
+  window.MathJax = settings;
   initializedMathJax = true;
 }
 
@@ -72,6 +81,8 @@ export default {
   name: "apply-math",
   initialize(container) {
     const siteSettings = container.lookup('site-settings:main');
+    zoom_on_hover = siteSettings.discourse_math_zoom_on_hover;
+    enable_accessibility = siteSettings.discourse_math_enable_accessibility;
     if (siteSettings.discourse_math_enabled) {
       withPluginApi('0.5', initializeMath);
     }

config/locales/server.en.yml

@@ -4,3 +4,5 @@
 en:
   site_settings:
     discourse_math_enabled: 'Enable Discourse Math plugin (will add special processing to $ and $$ blocks)'
+    discourse_math_zoom_on_hover: 'Zoom 200% on hover'
+    discourse_math_enable_accessibility: 'Enable accessibility features'

config/locales/server.es.yml

@@ -4,3 +4,5 @@
 es:
   site_settings:
     discourse_math_enabled: 'Habilitar plugin Discourse Math (agregará procesamiento especial para los bloques con $ y $$)'
+    discourse_math_zoom_on_hover: 'Zoom 200% en hover'
+    discourse_math_enable_accessibility: 'Habilitar las funciones de accesibilidad'

config/locales/server.fi.yml

@@ -4,3 +4,5 @@
 fi:
   site_settings:
     discourse_math_enabled: 'Ota käyttöön Discoursen matematiikkalisäosa ($ ja $$ blokit käsitellään erityisellä tavalla)'
+    discourse_math_zoom_on_click: 'Zoomaa 200% hoverissa'
+    discourse_math_enable_accessibility: 'Ota käyttöön esteettömyysominaisuudet'

config/settings.yml

@@ -2,3 +2,9 @@ plugins:
   discourse_math_enabled:
     default: false
     client: true
+  discourse_math_zoom_on_hover:
+    default: false
+    client: true
+  discourse_math_enable_accessibility:
+    default: false
+    client: true