Expose setDictLang method

Signed-off-by: Yukai Huang <yukaihuangtw@gmail.com>

Author: Yukaii

public/js/lib/editor/index.js

@@ -724,8 +724,7 @@ export default class Editor {
       placeholder: "← Start by entering a title here\n===\nVisit /features if you don't know what to do.\nHappy hacking :)"
     })
 
-    // eslint-disable-next-line
-    new CodeMirrorSpellChecker(CodeMirror)
+    this.spellchecker = new CodeMirrorSpellChecker(CodeMirror)
     this.tableEditor = initTableEditor(this.editor)
 
     return this.editor

public/js/lib/editor/spellcheck.js

@@ -77,13 +77,17 @@ class CodeMirrorSpellChecker {
     }
 
     this.typo = undefined
-    this.setupCM(cm, lang)
+    this.defineSpellCheckerMode(cm, lang)
   }
 
-  setupCM (cm, lang) {
+  setDictLang (lang) {
+    findOrCreateTypoInstance(lang).then(typo => { this.typo = typo })
+  }
+
+  defineSpellCheckerMode (cm, lang) {
     cm.defineMode('spell-checker', config => {
       // Load AFF/DIC data async
-      findOrCreateTypoInstance(lang).then(typo => { this.typo = typo })
+      this.setDictLang(lang)
 
       // Define what separates a word
       const regexWord = '!"#$%&()*+,-./:;<=>?@[\\]^_`{|}~ '