Merge pull request #1271 from mslourens/utf8-uml

convert uml to utf8 before converting to base64

browser/lib/markdown.js

@@ -76,7 +76,17 @@ md.use(require('markdown-it-named-headers'), {
   }
 })
 md.use(require('markdown-it-kbd'))
-md.use(require('markdown-it-plantuml'))
+
+const deflate = require('markdown-it-plantuml/lib/deflate')
+md.use(require('markdown-it-plantuml'), '', {
+  generateSource: function (umlCode) {
+    const s = unescape(encodeURIComponent(umlCode))
+    const zippedCode = deflate.encode64(
+      deflate.zip_deflate(`@startuml\n${s}\n@enduml`, 9)
+    )
+    return `http://www.plantuml.com/plantuml/svg/${zippedCode}`
+  }
+})
 
 // Override task item
 md.block.ruler.at('paragraph', function (state, startLine/*, endLine */) {