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update XSelection.hs; apparently the utf8-string library has updated

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Note that this does not fix the apparent problems with actually using getSelection, even though it works fine from a GHCi prompt...
This commit is contained in:
gwern0
2007-11-30 16:14:29 +00:00
parent dcd3bc5324
commit e5c50cd0c8
1 changed files with 24 additions and 24 deletions
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48
XMonad/Util/XSelection.hs
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@@ -23,24 +23,24 @@ module XMonad.Util.XSelection (
safePromptSelection,
putSelection) where
import Graphics.X11.Xlib.Extras (Event(ev_event_display,
ev_time, ev_property, ev_target, ev_selection,
ev_requestor, ev_event_type),
xConvertSelection, xGetSelectionOwner, xSetSelectionOwner, getEvent,
currentTime, setSelectionNotify, getWindowProperty8, changeProperty8,
propModeReplace)
import Graphics.X11.Xlib (destroyWindow, createSimpleWindow, Display, XEventPtr,
sendEvent, nextEvent, sync, allocaXEvent, openDisplay, rootWindow,
defaultScreen, internAtom, Atom, selectionNotify, selectionRequest, noEventMask)
import Control.Concurrent (forkIO)
import Control.Exception as E (catch)
import Control.Monad(Monad (return, (>>)), Functor(..), liftM, join)
import Data.Bits (shiftL, (.&.), (.|.))
import Data.Char (chr, ord)
import Data.Maybe (fromMaybe)
import Foreign.C.Types (CChar)
import Data.Bits (shiftL, (.&.), (.|.))
import XMonad.Util.Run (safeSpawn, unsafeSpawn)
import Data.Word (Word8)
import Graphics.X11.Xlib.Extras (Event(ev_event_display,
ev_time, ev_property, ev_target, ev_selection,
ev_requestor, ev_event_type),
xConvertSelection, xGetSelectionOwner, xSetSelectionOwner, getEvent,
currentTime, setSelectionNotify, getWindowProperty8, changeProperty8,
propModeReplace)
import Graphics.X11.Xlib (destroyWindow, createSimpleWindow, Display, XEventPtr,
sendEvent, nextEvent, sync, allocaXEvent, openDisplay, rootWindow,
defaultScreen, internAtom, Atom, selectionNotify, selectionRequest, noEventMask)
import XMonad (X, io)
import XMonad.Util.Run (safeSpawn, unsafeSpawn)
{- $usage
Add 'import XMonad.Util.XSelection' to the top of Config.hs
@@ -52,7 +52,6 @@ import XMonad (X, io)
> , ((modMask .|. shiftMask, xK_b ), promptSelection "firefox")
TODO:
* Fix Unicode handling. Currently it's still better than calling
'chr' to translate to ASCII, though.
As near as I can tell, the mangling happens when the String is
@@ -63,8 +62,7 @@ import XMonad (X, io)
<http://www.haskell.org/pipermail/xmonad/2007-September/001967.html>
and <http://www.haskell.org/pipermail/xmonad/2007-September/001966.html>.
* Possibly add some more elaborate functionality: Emacs' registers are nice.
-}
* Possibly add some more elaborate functionality: Emacs' registers are nice. -}
-- | Returns a String corresponding to the current mouse selection in X; if there is none, an empty string is returned. Note that this is
-- really only reliable for ASCII text and currently escapes or otherwise mangles more complex UTF-8 characters.
@@ -87,7 +85,7 @@ getSelection = do
ev <- getEvent e
if ev_event_type ev == selectionNotify
then do res <- getWindowProperty8 dpy clp win
return $ decode . fromMaybe [] $ res
return $ decode . map fromIntegral . fromMaybe [] $ res
else destroyWindow dpy win >> return ""
-- | Set the current X Selection to a given String.
@@ -112,9 +110,6 @@ putSelection text = do
ev <- getEvent e
if ev_event_type ev == selectionRequest
then do print ev
-- selection == eg PRIMARY
-- target == type eg UTF8
-- property == property name or None
allocaXEvent $ \replyPtr -> do
changeProperty8 (ev_event_display ev)
(ev_requestor ev)
@@ -122,7 +117,8 @@ putSelection text = do
ty
propModeReplace
(map (fromIntegral . ord) txt)
setSelectionNotify replyPtr (ev_requestor ev) (ev_selection ev) (ev_target ev) (ev_property ev) (ev_time ev)
setSelectionNotify replyPtr (ev_requestor ev) (ev_selection ev)
(ev_target ev) (ev_property ev) (ev_time ev)
sendEvent dpy (ev_requestor ev) False noEventMask replyPtr
sync dpy False
else do putStrLn "Unexpected Message Received"
@@ -142,11 +138,13 @@ promptSelection = unsafePromptSelection
safePromptSelection app = join $ io $ liftM (safeSpawn app) (getSelection)
unsafePromptSelection app = join $ io $ liftM unsafeSpawn $ fmap (\x -> app ++ " " ++ x) getSelection
{- UTF-8 decoding for internal use in getSelection. This code is copied from Eric Mertens's utf-string library
{- | Decode a UTF8 string packed into a list of Word8 values, directly to
String; does not deal with CChar, hence you will want the counter-intuitive 'map fromIntegral'.
UTF-8 decoding for internal use in getSelection. This code is copied from Eric Mertens's utf-string library
<http://code.haskell.org/utf8-string/> (version 0.1), which is BSD-3 licensed, as is this module.
It'd be better to just import Codec.Binary.UTF8.String (decode), but then users of this would need to install it; Xmonad has enough
dependencies already. -}
decode :: [CChar] -> String
decode :: [Word8] -> String
decode [ ] = ""
decode (c:cs)
| c < 0x80 = chr (fromEnum c) : decode cs
@@ -158,19 +156,21 @@ decode (c:cs)
| c < 0xfe = multi_byte 5 0x1 0x4000000
| otherwise = replacement_character : decode cs
where
replacement_character :: Char
replacement_character = '\xfffd'
multi_byte :: Int -> CChar -> Int -> [Char]
multi_byte :: Int -> Word8 -> Int -> [Char]
multi_byte i mask overlong = aux i cs (fromEnum (c .&. mask))
where
aux :: Int -> [CChar] -> Int -> [Char]
aux 0 rs acc
| overlong <= acc && acc <= 0x10ffff &&
(acc < 0xd800 || 0xdfff < acc) &&
(acc < 0xfffe || 0xffff < acc) = chr acc : decode rs
| otherwise = replacement_character : decode rs
aux n (r:rs) acc
| r .&. 0xc0 == 0x80 = aux (n-1) rs
$ shiftL acc 6 .|. fromEnum (r .&. 0x3f)
aux _ rs _ = replacement_character : decode rs