[gnome-shell] messageTray: Hide from picks during DND operations

[Florian Müllner <fmuellner src gnome org>]

commit d56411729b8f41738b6d54a00ebe944f6f85c76f
Author: Florian Müllner <fmuellner gnome org>
Date:   Sat Feb 21 09:05:58 2015 +0100

    messageTray: Hide from picks during DND operations
    
    As it is impossible to interact with notification banners while a DND
    operation is ongoing, we can temporarily hide the banner container from
    picks so that DND works as expected even while a banner is showing.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=744912

 js/ui/messageTray.js |   27 +++++++++++++++++++++++++++
 1 files changed, 27 insertions(+), 0 deletions(-)
---
diff --git a/js/ui/messageTray.js b/js/ui/messageTray.js
index 84408f8..f4b4f88 100644
--- a/js/ui/messageTray.js
+++ b/js/ui/messageTray.js
@@ -1555,6 +1555,25 @@ const MessageTray = new Lang.Class({
 
         Main.sessionMode.connect('updated', Lang.bind(this, this._sessionUpdated));
 
+        Main.overview.connect('window-drag-begin',
+                              Lang.bind(this, this._onDragBegin));
+        Main.overview.connect('window-drag-cancelled',
+                              Lang.bind(this, this._onDragEnd));
+        Main.overview.connect('window-drag-end',
+                              Lang.bind(this, this._onDragEnd));
+
+        Main.overview.connect('item-drag-begin',
+                              Lang.bind(this, this._onDragBegin));
+        Main.overview.connect('item-drag-cancelled',
+                              Lang.bind(this, this._onDragEnd));
+        Main.overview.connect('item-drag-end',
+                              Lang.bind(this, this._onDragEnd));
+
+        Main.xdndHandler.connect('drag-begin',
+                                 Lang.bind(this, this._onDragBegin));
+        Main.xdndHandler.connect('drag-end',
+                                 Lang.bind(this, this._onDragEnd));
+
         Main.wm.addKeybinding('focus-active-notification',
                               new Gio.Settings({ schema_id: SHELL_KEYBINDINGS_SCHEMA }),
                               Meta.KeyBindingFlags.NONE,
@@ -1571,6 +1590,14 @@ const MessageTray = new Lang.Class({
         this._updateState();
     },
 
+    _onDragBegin: function() {
+        Shell.util_set_hidden_from_pick(this.actor, true);
+    },
+
+    _onDragEnd: function() {
+        Shell.util_set_hidden_from_pick(this.actor, false);
+    },
+
     _onNotificationKeyRelease: function(actor, event) {
         if (event.get_key_symbol() == Clutter.KEY_Escape && event.get_state() == 0) {
             this._expireNotification();