Init rofi_process before dbus GetLayout, then pipe menuKeys in after

[Zren]

This way rofi captures key presses to filter while still loading all the menu items. A user might lose a few keystrokes if typed quickly after hitting Alt before the rofi window appears.

I need to make sure this optimization doesn't steal focus when it shouldn't.

diff --git a/usr/lib/plasma-hud/plasma-hud b/usr/lib/plasma-hud/plasma-hud
index 7b53fa5..3e74812 100755
--- a/usr/lib/plasma-hud/plasma-hud
+++ b/usr/lib/plasma-hud/plasma-hud
@@ -207,19 +207,9 @@ class PlasmaHudConfig(KdeConfig):

 ### Implementation
-def get_menu(menuKeys):
-    """
-    Generate menu of available menu items.
-    """
+def init_rofi():
     global rofi_process, shortcut_fg_color

-    if not menuKeys:
-        return ''
-
-    menu_string, *menu_items = menuKeys
-    for menu_item in menu_items:
-        menu_string += '\n' + menu_item
-
     # Get the currently active font.
     font_name = 'Sans 10'

@@ -313,11 +303,30 @@ def get_menu(menuKeys):
         '-color-active', bg_color +", " + fg_color + ", " + bg_color + ", " + info_bg_color + ", " + info_fg_color,
         '-color-urgent', bg_color +", " + fg_color + ", " + bg_color + ", " + error_bg_color + ", " + error_fg_color],
         stdout=subprocess.PIPE, stdin=subprocess.PIPE)
-    rofi_process.stdin.write(menu_string.encode('utf-8'))
-    menu_result = rofi_process.communicate()[0].decode('utf8').rstrip()
-    rofi_process.stdin.close()

-    return menu_result
+
+def get_menu(menuKeys):
+    """
+    Generate menu of available menu items.
+    """
+
+    if not menuKeys:
+        if rofi_process and rofi_process.poll() is None:
+            rofi_process.terminate()
+        return ''
+
+    menu_string, *menu_items = menuKeys
+    for menu_item in menu_items:
+        menu_string += '\n' + menu_item
+
+    if rofi_process and rofi_process.poll() is None:
+        rofi_process.stdin.write(menu_string.encode('utf-8'))
+        menu_result = rofi_process.communicate()[0].decode('utf8').rstrip()
+        rofi_process.stdin.close()
+        return menu_result
+    else:
+        return ''
+

 """
   try_appmenu_interface
@@ -359,6 +368,8 @@ def try_dbusmenu_interface(dbusmenu_bus, dbusmenu_object_path):
         logging.info('Unable to access dbusmenu items.')
         return False

+    init_rofi()
+
     dbusmenu_root_item = dbusmenu_object_iface.GetLayout(0, 0, ["label", "children-display"])
     dbusmenu_item_dict = dict()