[gnome-shell] ibusManager: Use Map to store engines

[Florian Müllner <fmuellner src gnome org>]

commit e95f3febd6398fa56d363a1e13bc17af3de1f5d1
Author: Florian Müllner <fmuellner gnome org>
Date:   Sun Jun 30 01:02:34 2019 +0200

    ibusManager: Use Map to store engines
    
    This is a clear case of key->value mapping, so using the corresponding
    data type makes sense.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/612

 js/misc/ibusManager.js | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)
---
diff --git a/js/misc/ibusManager.js b/js/misc/ibusManager.js
index 338542a13..5a0d2906a 100644
--- a/js/misc/ibusManager.js
+++ b/js/misc/ibusManager.js
@@ -42,7 +42,7 @@ var IBusManager = class {
         this._candidatePopup = new IBusCandidatePopup.CandidatePopup();
 
         this._panelService = null;
-        this._engines = {};
+        this._engines = new Map();
         this._ready = false;
         this._registerPropertiesId = 0;
         this._currentEngineName = null;
@@ -73,7 +73,7 @@ var IBusManager = class {
 
         this._panelService = null;
         this._candidatePopup.setPanelService(null);
-        this._engines = {};
+        this._engines.clear();
         this._ready = false;
         this._registerPropertiesId = 0;
         this._currentEngineName = null;
@@ -96,7 +96,7 @@ var IBusManager = class {
         if (enginesList) {
             for (let i = 0; i < enginesList.length; ++i) {
                 let name = enginesList[i].get_name();
-                this._engines[name] = enginesList[i];
+                this._engines.set(name, enginesList[i]);
             }
             this._updateReadiness();
         } else {
@@ -150,8 +150,7 @@ var IBusManager = class {
     }
 
     _updateReadiness() {
-        this._ready = (Object.keys(this._engines).length > 0 &&
-                       this._panelService != null);
+        this._ready = this._engines.size > 0 && this._panelService != null;
         this.emit('ready', this._ready);
     }
 
@@ -189,10 +188,10 @@ var IBusManager = class {
     }
 
     getEngineDesc(id) {
-        if (!this._ready || !this._engines.hasOwnProperty(id))
+        if (!this._ready || !this._engines.has(id))
             return null;
 
-        return this._engines[id];
+        return this._engines.get(id);
     }
 
     setEngine(id, callback) {