systray: Cleanups and improvements for --show-systray

- Add UI coverage
- Drop redundant systray_instance caching
- Tweaks help test and docs
- Show an error if the systray doesn't embed

Signed-off-by: Cole Robinson <crobinso@redhat.com>

man/virt-manager.rst

@@ -88,6 +88,7 @@ URI.
 ``--show-host-summary``
     Display the host/connection details window.
 
+
 SYSTEM TRAY OPTION
 ==================
 
@@ -95,7 +96,8 @@ Connection autostart will not be disabled and thus don't require specifying a
 manual ``--connect`` URI. But it supports ``--connect`` URI as well:
 
 ``--show-systray``
-    Launch virt-manager in system tray
+    Launch virt-manager only in system tray
+
 
 BUGS
 ====

tests/uitests/test_cli.py

@@ -80,6 +80,19 @@ def testShowDelete(app):
     app.wait_for_exit()
 
 
+def testShowSystray(app):
+    opts = ["--test-options=fake-systray", "--show-systray"]
+    app.open(use_uri=False,
+             extra_opts=opts,
+             window_name="vmm-fake-systray")
+    app.sleep(1)
+    app.stop()
+
+    app.open(uri="test:///default",
+             extra_opts=opts,
+             window_name="vmm-fake-systray")
+
+
 def testShowRemoteDBusConnect(app):
     """
     Test the remote app dbus connection

virtManager/engine.py

@@ -64,8 +64,6 @@ class vmmEngine(vmmGObject):
 
         self._exiting = False
 
-        self.systray_instance = None
-
         self._window_count = 0
         self._gtkapplication = None
         self._init_gtk_application()
@@ -98,7 +96,7 @@ class vmmEngine(vmmGObject):
         """
         Actual startup routines if we are running a new instance of the app
         """
-        self.systray_instance = vmmSystray.get_instance()
+        vmmSystray.get_instance()
         vmmInspection.get_instance()
 
         self.add_gsettings_handle(
@@ -335,6 +333,30 @@ class vmmEngine(vmmGObject):
         """
         return vmmSystray.get_instance().is_embedded()
 
+    def _show_systray_from_cli(self):
+        """
+        Handler for --show-systray from CLI.
+        We force show the systray, and wait for a timeout to report if
+        its embedded. If not we raise an error and exit the app
+        """
+        vmmSystray.get_instance().show_from_cli()
+
+        @_show_startup_error
+        def check(self, count):
+            count -= 1
+            if self._systray_is_embedded():
+                log.debug("systray embedded")
+                return
+            if count <= 0:  # pragma: no cover
+                raise RuntimeError("systray did not show up")
+            self.timeout_add(1000, check, self, count)  # pragma: no cover
+
+        startcount = 5
+        timeout = 1000
+        if self.config.CLITestOptions.fake_systray:
+            timeout = 1
+        self.timeout_add(timeout, check, self, startcount)
+
     def _can_exit(self):
         return (self._window_count <= 0 and not
                 self._systray_is_embedded())
@@ -445,8 +467,8 @@ class vmmEngine(vmmGObject):
                               self.CLI_SHOW_DOMAIN_DELETE]):
             self._cli_show_vm_helper(uri, clistr, show_window)
         elif show_window == self.CLI_SHOW_SYSTEM_TRAY:
-            log.debug("Showing in the system tray")
-            self.systray_instance._show_systray()
+            # Handled elsewhere
+            pass
         else:  # pragma: no cover
             raise RuntimeError("Unknown cli window command '%s'" %
                 show_window)
@@ -466,12 +488,13 @@ class vmmEngine(vmmGObject):
 
         log.debug("processing cli command uri=%s show_window=%s domain=%s",
             uri, show_window, domain)
-        if not uri:
-            if show_window == self.CLI_SHOW_SYSTEM_TRAY:
-                log.debug("Launching in the system tray without --connect")
-                self.systray_instance._show_systray()
-                return
 
+        if show_window == self.CLI_SHOW_SYSTEM_TRAY:
+            log.debug("Launching only in the system tray")
+            self._show_systray_from_cli()
+            if not uri:
+                return
+        elif not uri:
             log.debug("No cli action requested, launching default window")
             self._get_manager().show()
             return

virtManager/systray.py

@@ -434,6 +434,9 @@ class vmmSystray(vmmGObject):
     def is_embedded(self):
         return self._systray and self._systray.is_embedded()
 
+    def show_from_cli(self):
+        self._show_systray()
+
     def _cleanup(self):
         self._hide_systray()
         self._systray = None

virtManager/virtmanager.py

@@ -156,7 +156,7 @@ def parse_commandline():
     parser.add_argument("--show-host-summary", action="store_true",
         help="Show connection details window")
     parser.add_argument("--show-systray", action="store_true",
-        help="Launch virt-manager in system tray")
+        help="Launch virt-manager only in system tray")
 
     return parser.parse_known_args()