[gnome-shell] lookingGlass: Use resultsArea to keep track of results

[Florian Müllner <fmuellner src gnome org>]

commit 4dea1f801ae130b2a5c80537c4e05189dab0f6df
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Mon May 20 23:25:14 2019 +0200

    lookingGlass: Use resultsArea to keep track of results
    
    Now that results are actors we can just use their container to keep
    track of them
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/559

 js/ui/lookingGlass.js | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)
---
diff --git a/js/ui/lookingGlass.js b/js/ui/lookingGlass.js
index 85e8874b19..38e45edb45 100644
--- a/js/ui/lookingGlass.js
+++ b/js/ui/lookingGlass.js
@@ -793,7 +793,6 @@ class LookingGlass extends St.BoxLayout {
 
         this._it = null;
         this._offset = 0;
-        this._results = [];
 
         // Sort of magic, but...eh.
         this._maxItems = 150;
@@ -937,17 +936,14 @@ class LookingGlass extends St.BoxLayout {
     }
 
     _pushResult(command, obj) {
-        let index = this._results.length + this._offset;
+        let index = this._resultsArea.get_n_children() + this._offset;
         let result = new Result(this, CHEVRON + command, obj, index);
-        this._results.push(result);
         this._resultsArea.add(result);
         if (obj instanceof Clutter.Actor)
             this.setBorderPaintTarget(obj);
 
-        let children = this._resultsArea.get_children();
-        if (children.length > this._maxItems) {
-            this._results.shift();
-            children[0].destroy();
+        if (this._resultsArea.get_n_children() > this._maxItems) {
+            this._resultsArea.get_first_child().destroy();
             this._offset++;
         }
         this._it = obj;
@@ -1034,7 +1030,7 @@ class LookingGlass extends St.BoxLayout {
 
     getResult(idx) {
         try {
-            return this._results[idx - this._offset].o;
+            return this._resultsArea.get_child_at_index(idx - this._offset).o;
         } catch (e) {
             throw new Error(`Unknown result at index ${idx}`);
         }