Don't process desktop entries if they won't show

If for any reason the desktop entry won't be shown (for example if
NoDisplay is set), then don't process the desktop entry any further as
there is no need to. Should make processing a tiny bit faster.

src/xdgmenumaker

@@ -232,6 +232,21 @@ def icon_full_path(icon):
 def get_entry_info(desktopfile):
     show = True
     de = dentry.DesktopEntry(filename=desktopfile)
+
+    # skip processing the rest of the desktop entry if the item is to not be
+    # displayed anyway 
+    onlyshowin = de.getOnlyShowIn()
+    notshowin = de.getNotShowIn()
+    hidden = de.getHidden()
+    nodisplay = de.getNoDisplay()
+    # none of the freedesktop registered environments are supported by
+    # OnlyShowIn anyway:
+    # http://standards.freedesktop.org/menu-spec/latest/apb.html
+    # So if OnlyShowIn is set, it certainly isn't for any of the WMs
+    # xdgmenumaker supports.
+    if (onlyshowin != []) or (desktop in notshowin) or hidden or nodisplay:
+        return None
+
     name = de.getName().encode('utf-8')
 
     if seticon:
@@ -241,12 +256,6 @@ def get_entry_info(desktopfile):
     else:
         icon = None
 
-    hidden = de.getHidden()
-    if hidden:
-        show = False
-    nodisplay = de.getNoDisplay()
-    if nodisplay:
-        show = False
 
     # removing any %U or %F from the exec line
     command = de.getExec().partition('%')[0]
@@ -289,20 +298,9 @@ def get_entry_info(desktopfile):
     else:
         category = other
 
-    onlyshowin = de.getOnlyShowIn()
-    notshowin = de.getNotShowIn()
-    # none of the freedesktop registered environments are supported by this anyway
-    # http://standards.freedesktop.org/menu-spec/latest/apb.html
-    if onlyshowin != []:
-        show = False
-    if desktop in notshowin:
-        show = False
-    if show:
-        app = App(name, icon, command, path)
-        mentry = MenuEntry(category, app)
-        return mentry
-    else:
-        return None
+    app = App(name, icon, command, path)
+    mentry = MenuEntry(category, app)
+    return mentry
 
 
 def sortedcategories(applist):