closeDialog: Periodically check for window to become responsive againwip/fmuellner/ping-frozen-windows

The close dialog for non-responding windows is closed automatically
when we detect that the window is responding again. However as we
currently only ping the window in response to certain user actions
(like focusing the window or opening the window menu), this can
easily go undetected.

Address this by periodically pinging the window while the close
dialog is shown.

https://gitlab.gnome.org/GNOME/gnome-shell/issues/298

1 files changed, 12 insertions, 0 deletions

diff --git a/js/ui/closeDialog.js b/js/ui/closeDialog.js
index 821480a9c..7943880d8 100644
--- a/js/ui/closeDialog.js
+++ b/js/ui/closeDialog.js
@@ -2,6 +2,7 @@
 
 const Clutter = imports.gi.Clutter;
 const Gio = imports.gi.Gio;
+const GLib = imports.gi.GLib;
 const GObject = imports.gi.GObject;
 const Lang = imports.lang;
 const Meta = imports.gi.Meta;
@@ -13,6 +14,7 @@ const Tweener = imports.ui.tweener;
 
 var FROZEN_WINDOW_BRIGHTNESS = -0.3
 var DIALOG_TRANSITION_TIME = 0.15
+var ALIVE_TIMEOUT = 5000;
 
 var CloseDialog = new Lang.Class({
     Name: 'CloseDialog',
@@ -26,6 +28,7 @@ var CloseDialog = new Lang.Class({
         this.parent();
         this._window = window;
         this._dialog = null;
+        this._timeoutId = 0;
     },
 
     get window() {
@@ -99,6 +102,12 @@ var CloseDialog = new Lang.Class({
 
         Meta.disable_unredirect_for_screen(global.screen);
 
+        this._timeoutId = GLib.timeout_add(GLib.PRIORITY_DEFAULT, ALIVE_TIMEOUT,
+            () => {
+                this._window.check_alive(global.display.get_current_time_roundtrip());
+                return GLib.SOURCE_CONTINUE;
+            });
+
         this._addWindowEffect();
         this._initDialog();
 
@@ -121,6 +130,9 @@ var CloseDialog = new Lang.Class({
 
         Meta.enable_unredirect_for_screen(global.screen);
 
+        GLib.source_remove(this._timeoutId);
+        this._timeoutId = 0;
+
         let dialog = this._dialog;
         this._dialog = null;
         this._removeWindowEffect();