All: Disabled Mermaid support for now

ReactNativeClient/lib/MdToHtml.js

@@ -198,7 +198,8 @@ class MdToHtml {
 			this.rendererPlugins_['mermaid'] = new MdToHtml_Mermaid();
 		}
 
-		return language in this.rendererPlugins_ ? this.rendererPlugins_[language] : null;
+		const plugin = this.rendererPlugins_[language];
+		return plugin && plugin.enabled() ? plugin : null;
 	}
 
 	parseInlineCodeLanguage_(content) {

ReactNativeClient/lib/MdToHtml_Katex.js

@@ -2,10 +2,12 @@ const { shim } = require('lib/shim');
 const katex = require('katex');
 const katexCss = require('lib/csstojs/katex.css.js');
 const Setting = require('lib/models/Setting');
+const MdToHtml_PluginBase = require('./MdToHtml_PluginBase');
 
-class MdToHtml_Katex {
+class MdToHtml_Katex extends MdToHtml_PluginBase {
 
 	constructor() {
+		super();
 		this.cache_ = {};
 		this.assetsLoaded_ = false;
 

ReactNativeClient/lib/MdToHtml_Mermaid.js

@@ -1,6 +1,12 @@
 const { shim } = require('lib/shim');
+const MdToHtml_PluginBase = require('./MdToHtml_PluginBase');
 
-class MdToHtml_Mermaid {
+class MdToHtml_Mermaid extends MdToHtml_PluginBase {
+
+	constructor() {
+		super();
+		this.setEnabled(false);
+	}
 
 	name() {
 		return 'mermaid';

ReactNativeClient/lib/MdToHtml_PluginBase.js

@@ -0,0 +1,21 @@
+class MdToHtml_PluginBase {
+
+	constructor() {
+		this.enabled_ = true;
+	}
+
+	setEnabled(v) {
+		this.enabled_ = v;
+	}
+
+	enabled() {
+		return this.enabled_;
+	}
+
+	disabled() {
+		return !this.enabled();
+	}
+
+}
+
+module.exports = MdToHtml_PluginBase;