New configuration option "persistent"

When persistent is set to True then xmobar will always be mapped
(revealed) and never be hidden.

The flag is checked in eventLoop and operation to map/unmap windows is
not carried out if persistence is desired.

3 files changed, 21 insertions, 9 deletions

diff --git a/src/Config.hs b/src/Config.hs
index 712687d..47358b0 100644
--- a/src/Config.hs
+++ b/src/Config.hs
@@ -57,6 +57,8 @@ data Config =
            , borderColor    :: String     -- ^ Border color
            , lowerOnStart   :: Bool       -- ^ Lower to the bottom of the
                                           --   window stack on initialization
+           , persistent     :: Bool       -- ^ Whether automatic hiding should
+                                          --   be enabled or disabled
            , commands       :: [Runnable] -- ^ For setting the command, the command arguments
                                           --   and refresh rate for the programs to run (optional)
            , sepChar        :: String     -- ^ The character to be used for indicating
@@ -96,6 +98,7 @@ defaultConfig =
            , border = NoBorder
            , borderColor  = "#BFBFBF"
            , lowerOnStart = True
+           , persistent   = False
            , commands = [ Run $ Date "%a %b %_d %Y * %H:%M:%S" "theDate" 10
                         , Run StdinReader]
            , sepChar  = "%"
diff --git a/src/Parsers.hs b/src/Parsers.hs
index f5f00a9..c92480e 100644
--- a/src/Parsers.hs
+++ b/src/Parsers.hs
@@ -131,13 +131,15 @@ parseConfig = runParser parseConf fields "Config" . stripComments
               <$?> pFont         <|?> pBgColor
               <|?> pFgColor      <|?> pPosition
               <|?> pBorder       <|?> pBdColor
-              <|?> pLowerOnStart <|?> pCommands
-              <|?> pSepChar      <|?> pAlignSep
-              <|?> pTemplate
+              <|?> pLowerOnStart <|?> pPersistent
+              <|?> pCommands     <|?> pSepChar
+              <|?> pAlignSep     <|?> pTemplate
 
       fields    = [ "font", "bgColor", "fgColor", "sepChar", "alignSep"
                   , "border", "borderColor" ,"template", "position"
-                  , "lowerOnStart", "commands"]
+                  , "lowerOnStart", "persistent", "commands"
+                  ]
+
       pFont     = strField font     "font"
       pBgColor  = strField bgColor  "bgColor"
       pFgColor  = strField fgColor  "fgColor"
@@ -148,6 +150,7 @@ parseConfig = runParser parseConf fields "Config" . stripComments
 
       pPosition     = field position     "position"     $ tillFieldEnd >>= read' "position"
       pLowerOnStart = field lowerOnStart "lowerOnStart" $ tillFieldEnd >>= read' "lowerOnStart"
+      pPersistent   = field persistent   "persistent"   $ tillFieldEnd >>= read' "persistent"
       pBorder       = field border       "border"       $ tillFieldEnd >>= read' "border"
       pCommands     = field commands     "commands"     $ readCommands
 
diff --git a/src/Xmobar.hs b/src/Xmobar.hs
index a65a236..1ae55bb 100644
--- a/src/Xmobar.hs
+++ b/src/Xmobar.hs
@@ -145,11 +145,17 @@ eventLoop tv xc@(XConf d _ w fs cfg) signal = do
          Toggle -> toggle
 
     where
-        hide   = hideWindow d w >> eventLoop tv xc signal
-        reveal = do
-            r' <- repositionWin d w fs cfg
-            showWindow d w
-            eventLoop tv (XConf d r' w fs cfg) signal
+        isPersistent = not $ persistent cfg
+
+        hide   = when isPersistent (hideWindow d w) >> eventLoop tv xc signal
+
+        reveal = if isPersistent
+            then do
+                r' <- repositionWin d w fs cfg
+                showWindow d w
+                eventLoop tv (XConf d r' w fs cfg) signal
+            else eventLoop tv xc signal
+
         toggle = isMapped d w >>= \b -> if b then hide else reveal
 
         reposWindow rcfg = do