From 945d83608a0beaa714f7d9826581bde716238d70 Mon Sep 17 00:00:00 2001
From: Laurent Cozic <laurent@cozic.net>
Date: Sat, 2 Mar 2019 23:22:41 +0000
Subject: [PATCH] All: Include injected Mermaid JS only when necessary

---
 ReactNativeClient/lib/MdToHtml_Mermaid.js | 4 ++--
 ReactNativeClient/lib/shim-init-react.js  | 9 +++++++++
 ReactNativeClient/lib/shim.js             | 1 +
 3 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/ReactNativeClient/lib/MdToHtml_Mermaid.js b/ReactNativeClient/lib/MdToHtml_Mermaid.js
index e5842eefc..20efea36a 100644
--- a/ReactNativeClient/lib/MdToHtml_Mermaid.js
+++ b/ReactNativeClient/lib/MdToHtml_Mermaid.js
@@ -1,5 +1,4 @@
 const { shim } = require('lib/shim');
-const injectedJs = require('lib/rnInjectedJs/mermaid');
 
 class MdToHtml_Mermaid {
 
@@ -20,7 +19,8 @@ class MdToHtml_Mermaid {
 	}
 
 	injectedJavaScript() {
-		return injectedJs + '\n' + 'mermaid.init();';
+		const js = shim.injectedJs('mermaid');
+		return js ? js + '\n' + 'mermaid.init();' : '';
 	}
 
 	async loadAssets() {}
diff --git a/ReactNativeClient/lib/shim-init-react.js b/ReactNativeClient/lib/shim-init-react.js
index f8c9b1098..468d62f95 100644
--- a/ReactNativeClient/lib/shim-init-react.js
+++ b/ReactNativeClient/lib/shim-init-react.js
@@ -12,6 +12,10 @@ const { basename, fileExtension } = require('lib/path-utils.js');
 const { uuid } = require('lib/uuid.js');
 const Resource = require('lib/models/Resource');
 
+const injectedJs = {
+	mermaid: require('lib/rnInjectedJs/mermaid'),
+};
+
 function shimInit() {
 	shim.Geolocation = GeolocationReact;
 	shim.setInterval = PoorManIntervals.setInterval;
@@ -164,6 +168,11 @@ function shimInit() {
 		return resource;
 	}
 
+	shim.injectedJs = function(name) {
+		if (name in injectedJs) return injectedJs[name];
+		return '';
+	}
+
 }
 
 module.exports = { shimInit };
\ No newline at end of file
diff --git a/ReactNativeClient/lib/shim.js b/ReactNativeClient/lib/shim.js
index d5416ec92..f3eb0205a 100644
--- a/ReactNativeClient/lib/shim.js
+++ b/ReactNativeClient/lib/shim.js
@@ -149,5 +149,6 @@ shim.imageFromDataUrl = async function(imageDataUrl, filePath, options = null) {
 shim.Buffer = null;
 shim.openUrl = () => { throw new Error('Not implemented'); }
 shim.waitForFrame = () => { throw new Error('Not implemented'); }
+shim.injectedJs = name => '';
 
 module.exports = { shim };