Split Modules into Library & Executable Structure

Move the Main module to a new `app` directory. All other modules have
been nested under the `Xmobar` name. Lots of module headers & imports
were updated.

1 files changed, 148 insertions, 0 deletions

diff --git a/src/Xmobar/Plugins/Monitors/Mpris.hs b/src/Xmobar/Plugins/Monitors/Mpris.hs
new file mode 100644
index 0000000..3556649
--- /dev/null
+++ b/src/Xmobar/Plugins/Monitors/Mpris.hs
@@ -0,0 +1,148 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+----------------------------------------------------------------------------
+-- |
+-- Module      :  Plugins.Monitors.Mpris
+-- Copyright   :  (c) Artem Tarasov
+-- License     :  BSD-style (see LICENSE)
+--
+-- Maintainer  :  Artem Tarasov <lomereiter@gmail.com>
+-- Stability   :  unstable
+-- Portability :  unportable
+--
+--   MPRIS song info
+--
+----------------------------------------------------------------------------
+
+module Xmobar.Plugins.Monitors.Mpris ( mprisConfig, runMPRIS1, runMPRIS2 ) where
+
+-- TODO: listen to signals
+
+import Xmobar.Plugins.Monitors.Common
+
+import Text.Printf (printf)
+
+import DBus
+import qualified DBus.Client as DC
+
+import Control.Arrow ((***))
+import Data.Maybe ( fromJust )
+import Data.Int ( Int32, Int64 )
+import System.IO.Unsafe (unsafePerformIO)
+
+import Control.Exception (try)
+
+class MprisVersion a where
+    getMethodCall :: a -> String -> MethodCall
+    getMetadataReply :: a -> DC.Client -> String -> IO [Variant]
+    getMetadataReply mv c p = fmap methodReturnBody (DC.call_ c $ getMethodCall mv p)
+    fieldsList :: a -> [String]
+
+data MprisVersion1 = MprisVersion1
+instance MprisVersion MprisVersion1 where
+    getMethodCall MprisVersion1 p = (methodCall objectPath interfaceName memberName)
+        { methodCallDestination = Just busName
+        }
+        where
+        busName       = busName_     $ "org.mpris." ++ p
+        objectPath    = objectPath_    "/Player"
+        interfaceName = interfaceName_ "org.freedesktop.MediaPlayer"
+        memberName    = memberName_    "GetMetadata"
+
+    fieldsList MprisVersion1 = [ "album", "artist", "arturl", "mtime", "title"
+                               , "tracknumber" ]
+
+data MprisVersion2 = MprisVersion2
+instance MprisVersion MprisVersion2 where
+    getMethodCall MprisVersion2 p = (methodCall objectPath interfaceName memberName)
+        { methodCallDestination = Just busName
+        , methodCallBody = arguments
+        }
+        where
+        busName       = busName_     $ "org.mpris.MediaPlayer2." ++ p
+        objectPath    = objectPath_    "/org/mpris/MediaPlayer2"
+        interfaceName = interfaceName_ "org.freedesktop.DBus.Properties"
+        memberName    = memberName_    "Get"
+        arguments     = map (toVariant::String -> Variant)
+                            ["org.mpris.MediaPlayer2.Player", "Metadata"]
+
+    fieldsList MprisVersion2 = [ "xesam:album", "xesam:artist", "mpris:artUrl"
+                               , "mpris:length", "xesam:title",
+                                 "xesam:trackNumber", "xesam:composer",
+                                 "xesam:genre"
+                               ]
+
+mprisConfig :: IO MConfig
+mprisConfig = mkMConfig "<artist> - <title>"
+                [ "album", "artist", "arturl", "length"
+                , "title", "tracknumber" , "composer", "genre"
+                ]
+
+{-# NOINLINE dbusClient #-}
+dbusClient :: DC.Client
+dbusClient = unsafePerformIO DC.connectSession
+
+runMPRIS :: (MprisVersion a) => a -> String -> [String] -> Monitor String
+runMPRIS version playerName _ = do
+    metadata <- io $ getMetadata version dbusClient playerName
+    if [] == metadata then
+      getConfigValue naString
+      else mapM showWithPadding (makeList version metadata) >>= parseTemplate
+
+runMPRIS1 :: String -> [String] -> Monitor String
+runMPRIS1 = runMPRIS MprisVersion1
+
+runMPRIS2 :: String -> [String] -> Monitor String
+runMPRIS2 = runMPRIS MprisVersion2
+
+---------------------------------------------------------------------------
+
+fromVar :: (IsVariant a) => Variant -> a
+fromVar = fromJust . fromVariant
+
+unpackMetadata :: [Variant] -> [(String, Variant)]
+unpackMetadata [] = []
+unpackMetadata xs =
+  (map (fromVar *** fromVar) . unpack . head) xs where
+    unpack v = case variantType v of
+                 TypeDictionary _ _ -> dictionaryItems $ fromVar v
+                 TypeVariant -> unpack $ fromVar v
+                 TypeStructure _ ->
+                   let x = structureItems (fromVar v) in
+                     if null x then [] else unpack (head x)
+                 _ -> []
+
+getMetadata :: (MprisVersion a) => a -> DC.Client -> String -> IO [(String, Variant)]
+getMetadata version client player = do
+    reply <- try (getMetadataReply version client player) ::
+                            IO (Either DC.ClientError [Variant])
+    return $ case reply of
+                  Right metadata -> unpackMetadata metadata;
+                  Left _ -> []
+
+makeList :: (MprisVersion a) => a -> [(String, Variant)] -> [String]
+makeList version md = map getStr (fieldsList version) where
+            formatTime n = (if hh == 0 then printf "%02d:%02d"
+                                       else printf "%d:%02d:%02d" hh) mm ss
+                           where hh = (n `div` 60) `div` 60
+                                 mm = (n `div` 60) `mod` 60
+                                 ss = n `mod` 60
+            getStr str = case lookup str md of
+                Nothing -> ""
+                Just v -> case variantType v of
+                            TypeString -> fromVar v
+                            TypeInt32 -> let num = fromVar v in
+                                          case str of
+                                           "mtime" -> formatTime (num `div` 1000)
+                                           "tracknumber" -> printf "%02d" num
+                                           "mpris:length" -> formatTime (num `div` 1000000)
+                                           "xesam:trackNumber" -> printf "%02d" num
+                                           _ -> (show::Int32 -> String) num
+                            TypeInt64 -> let num = fromVar v in
+                                          case str of
+                                           "mpris:length" -> formatTime (num `div` 1000000)
+                                           _ -> (show::Int64 -> String) num
+                            TypeArray TypeString ->
+                              let x = arrayItems (fromVar v) in
+                                if null x then "" else fromVar (head x)
+                            _ -> ""