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Diffstat (limited to 'lib/Graphics/X11/Xlib/Display/Extra.hs')
| -rw-r--r-- | lib/Graphics/X11/Xlib/Display/Extra.hs | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/lib/Graphics/X11/Xlib/Display/Extra.hs b/lib/Graphics/X11/Xlib/Display/Extra.hs new file mode 100644 index 0000000..16b1a74 --- /dev/null +++ b/lib/Graphics/X11/Xlib/Display/Extra.hs @@ -0,0 +1,20 @@ +module Graphics.X11.Xlib.Display.Extra where + +import Control.Exception (bracket) +import System.Environment (getEnv) +import System.IO.Unsafe (unsafePerformIO) +import Graphics.X11.Xlib.Types (Display) +import Graphics.X11.Xlib.Display (closeDisplay, openDisplay) + + +defaultDisplayName :: String +defaultDisplayName = + unsafePerformIO (getEnv "DISPLAY") + +withDisplay :: String -> (Display -> IO a) -> IO a +withDisplay display = + bracket (openDisplay display) closeDisplay + +withDefaultDisplay :: (Display -> IO a) -> IO a +withDefaultDisplay = + withDisplay defaultDisplayName |