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authorjao <jao@gnu.org>2018-11-25 03:21:57 +0000
committerjao <jao@gnu.org>2018-11-25 03:21:57 +0000
commitb909762b396932bf6d768c1f4beae5bbcb50f95a (patch)
treeac532dd46a8c21125e618e9d8fdedb82172e3e65 /src/lib/Xmobar/X11
parent658dd00771852286bb9ce007d11db869c237d934 (diff)
downloadxmobar-b909762b396932bf6d768c1f4beae5bbcb50f95a.tar.gz
xmobar-b909762b396932bf6d768c1f4beae5bbcb50f95a.tar.bz2
XPMFile also in Xmobar.X11
Diffstat (limited to 'src/lib/Xmobar/X11')
-rw-r--r--src/lib/Xmobar/X11/Bitmap.hs2
-rw-r--r--src/lib/Xmobar/X11/XPMFile.hsc60
2 files changed, 61 insertions, 1 deletions
diff --git a/src/lib/Xmobar/X11/Bitmap.hs b/src/lib/Xmobar/X11/Bitmap.hs
index 7b7afeb..dee3966 100644
--- a/src/lib/Xmobar/X11/Bitmap.hs
+++ b/src/lib/Xmobar/X11/Bitmap.hs
@@ -28,7 +28,7 @@ import Xmobar.Parsers (Widget(..))
import Xmobar.Actions (Action)
#ifdef XPM
-import Xmobar.XPMFile(readXPMFile)
+import Xmobar.X11.XPMFile(readXPMFile)
import Control.Applicative((<|>))
#endif
diff --git a/src/lib/Xmobar/X11/XPMFile.hsc b/src/lib/Xmobar/X11/XPMFile.hsc
new file mode 100644
index 0000000..2daffac
--- /dev/null
+++ b/src/lib/Xmobar/X11/XPMFile.hsc
@@ -0,0 +1,60 @@
+{-# LANGUAGE FlexibleContexts, ForeignFunctionInterface #-}
+-----------------------------------------------------------------------------
+-- |
+-- Module : XPMFile
+-- Copyright : (C) 2014, 2018 Alexander Shabalin
+-- License : BSD3
+--
+-- Maintainer : jao@gnu.org
+-- Stability : unstable
+-- Portability : unportable
+--
+-----------------------------------------------------------------------------
+
+module Xmobar.X11.XPMFile(readXPMFile) where
+
+#if MIN_VERSION_mtl(2, 2, 1)
+import Control.Monad.Except(MonadError(..))
+#else
+import Control.Monad.Error(MonadError(..))
+#endif
+import Control.Monad.Trans(MonadIO(..))
+import Graphics.X11.Xlib(Dimension, Display(..), Drawable, Pixmap)
+import Foreign.C.String(CString, withCString)
+import Foreign.C.Types(CInt(..), CLong)
+import Foreign.Ptr(Ptr)
+import Foreign.Marshal.Alloc(alloca, allocaBytes)
+import Foreign.Storable(peek, peekByteOff, pokeByteOff)
+
+#include <X11/xpm.h>
+
+foreign import ccall "XpmReadFileToPixmap"
+ xpmReadFileToPixmap :: Display -> Drawable -> CString -> Ptr Pixmap -> Ptr Pixmap -> Ptr () -> IO CInt
+
+readXPMFile
+ :: (MonadError String m, MonadIO m)
+ => Display
+ -> Drawable
+ -> String
+ -> m (Dimension, Dimension, Pixmap, Maybe Pixmap)
+readXPMFile display d filename =
+ toError $ withCString filename $ \c_filename ->
+ alloca $ \pixmap_return ->
+ alloca $ \shapemask_return ->
+ allocaBytes (#size XpmAttributes) $ \attributes -> do
+ (#poke XpmAttributes, valuemask) attributes ((#const XpmReturnAllocPixels) :: CLong)
+ res <- xpmReadFileToPixmap display d c_filename pixmap_return shapemask_return attributes
+ case res of
+ 0 -> do
+ width <- (#peek XpmAttributes, width) attributes
+ height <- (#peek XpmAttributes, height) attributes
+ pixmap <- peek pixmap_return
+ shapemask <- peek shapemask_return
+ return $ Right (width, height, pixmap, if shapemask == 0 then Nothing else Just shapemask)
+ 1 -> return $ Left "readXPMFile: XpmColorError"
+ -1 -> return $ Left "readXPMFile: XpmOpenFailed"
+ -2 -> return $ Left "readXPMFile: XpmFileInvalid"
+ -3 -> return $ Left "readXPMFile: XpmNoMemory"
+ -4 -> return $ Left "readXPMFile: XpmColorFailed"
+ _ -> return $ Left "readXPMFile: Unknown error"
+ where toError m = either throwError return =<< liftIO m