[gnome-shell/wip/fmuellner/fix-mount-operations] automountManager: Explicitly track active operations

[Florian Müllner <fmuellner src gnome org>]

commit 5594a1ee0b4cd66be1729286b3c34ca519909366
Author: Florian Müllner <fmuellner gnome org>
Date:   Fri Oct 5 19:09:28 2018 +0200

    automountManager: Explicitly track active operations
    
    As a mount operation's UI may be reused (for example after mistyping
    the password), we only close the operation once the mount has finished
    (successfully or with error).
    
    We therefore need to track ongoing operations, which we currently do
    by monkey-patching the corresponding volume object. However while the
    underlying GVolume object indeed remains the same through-out the
    operation, the JS wrapper object isn't referenced anywhere and may
    thus be garbage collected, resulting in a stuck dialog.
    
    Fix this issue by tracking active operations explicitly, so that all
    involved objects are referenced until the end of the operation.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/issues/565

 js/ui/components/automountManager.js | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)
---
diff --git a/js/ui/components/automountManager.js b/js/ui/components/automountManager.js
index a6cd85792..3e2dcd923 100644
--- a/js/ui/components/automountManager.js
+++ b/js/ui/components/automountManager.js
@@ -25,6 +25,7 @@ var AutomountManager = new Lang.Class({
     _init() {
         this._settings = new Gio.Settings({ schema_id: SETTINGS_SCHEMA });
         this._volumeQueue = [];
+        this._activeOperations = new Map();
         this._session = new GnomeSession.SessionManager();
         this._session.connectSignal('InhibitorAdded',
                                     this._InhibitorsChanged.bind(this));
@@ -182,7 +183,7 @@ var AutomountManager = new Lang.Class({
             this._allowAutorun(volume);
 
         let mountOp = operation ? operation.mountOp : null;
-        volume._operation = operation;
+        this._activeOperations.set(volume, operation);
 
         volume.mount(0, mountOp, null,
                      this._onVolumeMounted.bind(this));
@@ -219,7 +220,8 @@ var AutomountManager = new Lang.Class({
     },
 
     _reaskPassword(volume) {
-        let existingDialog = volume._operation ? volume._operation.borrowDialog() : null;
+        let prevOperation = this._activeOperations.get(volume);
+        let existingDialog = prevOperation ? prevOperation.borrowDialog() : null;
         let operation = 
             new ShellMountOperation.ShellMountOperation(volume,
                                                         { existingDialog: existingDialog });
@@ -227,8 +229,11 @@ var AutomountManager = new Lang.Class({
     },
 
     _closeOperation(volume) {
-        if (volume._operation)
-            volume._operation.close();
+        let operation = this._activeOperations.get(volume);
+        if (!operation)
+            return;
+        operation.close();
+        this._activeOperations.delete(volume);
     },
 
     _allowAutorun(volume) {