[GTK] Fix windows not showing topmost on desktop

When showing the main_window, Add dialog or file manager windows they
would not appear at the top of the display stack, always one below.

This is due to needing the windowing timestamp to be passed when making
these calls. The recommended Gtk solution to use present_with_time and
use an event.time timestamp. However, this does not always work so
instead used the lower level Gdk set_user_time and fetch timestamp from
X11 server.

Notes:
- Using int(time.time()) for timestamp is not correct as the
  windowing timestamp is different.
- Gtk.get_current_event_time only works when there is an event being
  processed.
- It might be useful for non-X11 windowing systems to store event
  timestamps so that we have a value to use instead of 0.

deluge/ui/gtk3/addtorrentdialog.py

@@ -155,14 +155,17 @@ class AddTorrentDialog(component.Component):
         self.update_core_config(True, focus)
 
     def _show(self, focus=False):
-        if component.get('MainWindow').is_on_active_workspace():
-            self.dialog.set_transient_for(component.get('MainWindow').window)
+        main_window = component.get('MainWindow')
+        if main_window.is_on_active_workspace():
+            self.dialog.set_transient_for(main_window.window)
         else:
             self.dialog.set_transient_for(None)
+            self.dialog.set_position(Gtk.WindowPosition.CENTER)
 
         self.dialog.present()
         if focus:
-            self.dialog.window.focus()
+            timestamp = main_window.get_timestamp()
+            self.dialog.get_window().set_user_time(timestamp)
 
     def hide(self):
         self.dialog.hide()

deluge/ui/gtk3/files_tab.py

@@ -321,7 +321,7 @@ class FilesTab(Tab):
             path = self.get_file_path(select).split('/')
             filepath = os.path.join(status['download_location'], *path)
             log.debug('Open file: %s', filepath)
-            timestamp = Gtk.get_current_event_time()
+            timestamp = component.get('MainWindow').get_timestamp()
             open_file(filepath, timestamp=timestamp)
 
     def _on_show_file(self, status):
@@ -334,7 +334,7 @@ class FilesTab(Tab):
             path = self.get_file_path(select).split('/')
             filepath = os.path.join(status['download_location'], *path)
             log.debug('Show file: %s', filepath)
-            timestamp = Gtk.get_current_event_time()
+            timestamp = component.get('MainWindow').get_timestamp()
             show_file(filepath, timestamp=timestamp)
 
     # The following 3 methods create the folder/file view in the treeview

deluge/ui/gtk3/mainwindow.py

@@ -13,7 +13,7 @@ import logging
 import os.path
 from hashlib import sha1 as sha
 
-from gi.repository import Gtk
+from gi.repository import GdkX11, Gtk
 from gi.repository.Gdk import DragAction, WindowState
 from twisted.internet import reactor
 from twisted.internet.error import ReactorNotRunning
@@ -173,6 +173,7 @@ class MainWindow(component.Component):
             # Restore the proper x,y coords for the window prior to showing it
             component.resume(self.child_components)
             self.window.present()
+            self.window.get_window().set_user_time(self.get_timestamp())
             self.load_window_state()
 
         if self.config['lock_tray'] and not self.visible():
@@ -190,6 +191,14 @@ class MainWindow(component.Component):
         else:
             restore()
 
+    def get_timestamp(self):
+        """Returns the timestamp for the windowing server."""
+        timestamp = 0
+        gdk_window = self.window.get_window()
+        if isinstance(gdk_window, GdkX11.X11Window):
+            timestamp = GdkX11.x11_get_server_time(gdk_window)
+        return timestamp
+
     def active(self):
         """Returns True if the window is active, False if not."""
         return self.window.is_active()
@@ -351,8 +360,6 @@ class MainWindow(component.Component):
 
         if Wnck:
             self.screen.force_update()
-            from gi.repository import GdkX11  # NOQA
-
             win = Wnck.Window.get(self.window.get_window().get_xid())
             if win:
                 active_wksp = win.get_screen().get_active_workspace()

deluge/ui/gtk3/menubar.py

@@ -313,7 +313,7 @@ class MenuBar(component.Component):
         log.debug('on_menuitem_open_folder')
 
         def _on_torrent_status(status):
-            timestamp = Gtk.get_current_event_time()
+            timestamp = component.get('MainWindow').get_timestamp()
             path = os.path.join(
                 status['download_location'], status['files'][0]['path'].split('/')[0]
             )