Implement simple spellchecker

src/browser/js/contextMenu.js

@@ -0,0 +1,26 @@
+const {ipcRenderer} = require('electron');
+const electronContextMenu = require('electron-context-menu');
+
+function getSuggestionsMenus(win, suggestions) {
+  return suggestions.map((s) => ({
+    label: s,
+    click() {
+      (win.webContents || win.getWebContents()).replaceMisspelling(s);
+    }
+  }));
+}
+
+module.exports = {
+  setup(win) {
+    electronContextMenu({
+      window: win,
+      prepend(params) {
+        if (params.isEditable && params.misspelledWord !== '') {
+          const suggestions = ipcRenderer.sendSync('get-spelling-suggestions', params.misspelledWord);
+          return getSuggestionsMenus(win, suggestions);
+        }
+        return [];
+      }
+    });
+  }
+};