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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE DeriveDataTypeable #-}</span>
<a name="line-2"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-3"></a><span class='hs-comment'>-- |</span>
<a name="line-4"></a><span class='hs-comment'>-- Module : XMonad.Util.Replace</span>
<a name="line-5"></a><span class='hs-comment'>-- Copyright : (c) Jan Vornberger 2009</span>
<a name="line-6"></a><span class='hs-comment'>-- License : BSD3-style (see LICENSE)</span>
<a name="line-7"></a><span class='hs-comment'>--</span>
<a name="line-8"></a><span class='hs-comment'>-- Maintainer : Adam Vogt <vogt.adam@gmail.com></span>
<a name="line-9"></a><span class='hs-comment'>-- Stability : unstable</span>
<a name="line-10"></a><span class='hs-comment'>-- Portability : unportable</span>
<a name="line-11"></a><span class='hs-comment'>--</span>
<a name="line-12"></a><span class='hs-comment'>-- Implements a @--replace@ behavior outside of core.</span>
<a name="line-13"></a><span class='hs-comment'>--</span>
<a name="line-14"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-15"></a>
<a name="line-16"></a><span class='hs-comment'>-- refer to core patches:</span>
<a name="line-17"></a><span class='hs-comment'>-- <a href="http://article.gmane.org/gmane.comp.lang.haskell.xmonad/8358">http://article.gmane.org/gmane.comp.lang.haskell.xmonad/8358</a></span>
<a name="line-18"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Util</span><span class='hs-varop'>.</span><span class='hs-conid'>Replace</span>
<a name="line-19"></a> <span class='hs-layout'>(</span> <span class='hs-comment'>-- * Usage</span>
<a name="line-20"></a> <span class='hs-comment'>-- $usage</span>
<a name="line-21"></a> <span class='hs-varid'>replace</span>
<a name="line-22"></a>
<a name="line-23"></a> <span class='hs-comment'>-- * Notes</span>
<a name="line-24"></a> <span class='hs-comment'>-- $shortcomings</span>
<a name="line-25"></a>
<a name="line-26"></a> <span class='hs-comment'>-- ** Implementing a @--replace@ flag</span>
<a name="line-27"></a> <span class='hs-comment'>-- $getArgs</span>
<a name="line-28"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-29"></a>
<a name="line-30"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span>
<a name="line-31"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Function</span>
<a name="line-32"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span>
<a name="line-33"></a>
<a name="line-34"></a><span class='hs-comment'>-- $usage</span>
<a name="line-35"></a><span class='hs-comment'>-- You must run the 'replace' action before starting xmonad proper, this</span>
<a name="line-36"></a><span class='hs-comment'>-- results in xmonad replacing the currently running WM regardless of the</span>
<a name="line-37"></a><span class='hs-comment'>-- arguments it is run with:</span>
<a name="line-38"></a><span class='hs-comment'>--</span>
<a name="line-39"></a><span class='hs-comment'>-- > import XMonad</span>
<a name="line-40"></a><span class='hs-comment'>-- > import XMonad.Util.Replace</span>
<a name="line-41"></a><span class='hs-comment'>-- > main = do</span>
<a name="line-42"></a><span class='hs-comment'>-- > replace</span>
<a name="line-43"></a><span class='hs-comment'>-- > xmonad $ defaultConfig { .... }</span>
<a name="line-44"></a><span class='hs-comment'>--</span>
<a name="line-45"></a>
<a name="line-46"></a><span class='hs-comment'>-- $shortcomings</span>
<a name="line-47"></a><span class='hs-comment'>-- This doesn't seem to work for replacing WMs that have been started</span>
<a name="line-48"></a><span class='hs-comment'>-- from within xmonad, such as with @'restart' "openbox" False@, but no other</span>
<a name="line-49"></a><span class='hs-comment'>-- WMs that implements --replace manage this either. 'replace' works for</span>
<a name="line-50"></a><span class='hs-comment'>-- replacing metacity when the full gnome-session is started at least.</span>
<a name="line-51"></a>
<a name="line-52"></a><span class='hs-comment'>-- $getArgs</span>
<a name="line-53"></a><span class='hs-comment'>-- You can use 'System.Environment.getArgs' to watch for an explicit</span>
<a name="line-54"></a><span class='hs-comment'>-- @--replace@ flag:</span>
<a name="line-55"></a><span class='hs-comment'>-- </span>
<a name="line-56"></a><span class='hs-comment'>-- > import XMonad</span>
<a name="line-57"></a><span class='hs-comment'>-- > import XMonad.Util.Replace (replace)</span>
<a name="line-58"></a><span class='hs-comment'>-- > import Control.Monad (when)</span>
<a name="line-59"></a><span class='hs-comment'>-- > import System.Environment (getArgs)</span>
<a name="line-60"></a><span class='hs-comment'>-- ></span>
<a name="line-61"></a><span class='hs-comment'>-- > main = do</span>
<a name="line-62"></a><span class='hs-comment'>-- > args <- getArgs</span>
<a name="line-63"></a><span class='hs-comment'>-- > when ("--replace" `elem` args) replace</span>
<a name="line-64"></a><span class='hs-comment'>-- > xmonad $ defaultConfig { .... }</span>
<a name="line-65"></a><span class='hs-comment'>--</span>
<a name="line-66"></a><span class='hs-comment'>--</span>
<a name="line-67"></a><span class='hs-comment'>-- Note that your @~\/.xmonad/xmonad-$arch-$os@ binary is not run with the same</span>
<a name="line-68"></a><span class='hs-comment'>-- flags as the @xmonad@ binary that calls it. You may be able to work around</span>
<a name="line-69"></a><span class='hs-comment'>-- this by running your @~\/.xmonad/xmonad-$arch-$os@ binary directly, which is</span>
<a name="line-70"></a><span class='hs-comment'>-- otherwise not recommended.</span>
<a name="line-71"></a>
<a name="line-72"></a><a name="replace"></a><span class='hs-comment'>-- | @replace@ must be run before xmonad starts to signals to compliant window</span>
<a name="line-73"></a><span class='hs-comment'>-- managers that they must exit and let xmonad take over.</span>
<a name="line-74"></a><span class='hs-definition'>replace</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-75"></a><span class='hs-definition'>replace</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-76"></a> <span class='hs-varid'>dpy</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>openDisplay</span> <span class='hs-str'>""</span>
<a name="line-77"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>dflt</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>defaultScreen</span> <span class='hs-varid'>dpy</span>
<a name="line-78"></a>
<a name="line-79"></a> <span class='hs-varid'>rootw</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>rootWindow</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>dflt</span>
<a name="line-80"></a>
<a name="line-81"></a> <span class='hs-comment'>-- check for other WM</span>
<a name="line-82"></a> <span class='hs-varid'>wmSnAtom</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>internAtom</span> <span class='hs-varid'>dpy</span> <span class='hs-layout'>(</span><span class='hs-str'>"WM_S"</span> <span class='hs-varop'>++</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>dflt</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-conid'>False</span>
<a name="line-83"></a> <span class='hs-varid'>currentWmSnOwner</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>xGetSelectionOwner</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>wmSnAtom</span>
<a name="line-84"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>currentWmSnOwner</span> <span class='hs-varop'>/=</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-85"></a> <span class='hs-varid'>putStrLn</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Screen "</span> <span class='hs-varop'>++</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>dflt</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span> <span class='hs-str'>" on display \""</span>
<a name="line-86"></a> <span class='hs-varop'>++</span> <span class='hs-layout'>(</span><span class='hs-varid'>displayString</span> <span class='hs-varid'>dpy</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span> <span class='hs-str'>"\" already has a window manager."</span>
<a name="line-87"></a>
<a name="line-88"></a> <span class='hs-comment'>-- prepare to receive destroyNotify for old WM</span>
<a name="line-89"></a> <span class='hs-varid'>selectInput</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>currentWmSnOwner</span> <span class='hs-varid'>structureNotifyMask</span>
<a name="line-90"></a>
<a name="line-91"></a> <span class='hs-comment'>-- create off-screen window</span>
<a name="line-92"></a> <span class='hs-varid'>netWmSnOwner</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>allocaSetWindowAttributes</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>attributes</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-93"></a> <span class='hs-varid'>set_override_redirect</span> <span class='hs-varid'>attributes</span> <span class='hs-conid'>True</span>
<a name="line-94"></a> <span class='hs-varid'>set_event_mask</span> <span class='hs-varid'>attributes</span> <span class='hs-varid'>propertyChangeMask</span>
<a name="line-95"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>screen</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>defaultScreenOfDisplay</span> <span class='hs-varid'>dpy</span>
<a name="line-96"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>visual</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>defaultVisualOfScreen</span> <span class='hs-varid'>screen</span>
<a name="line-97"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>attrmask</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cWOverrideRedirect</span> <span class='hs-varop'>.|.</span> <span class='hs-varid'>cWEventMask</span>
<a name="line-98"></a> <span class='hs-varid'>createWindow</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>rootw</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-num'>100</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-num'>100</span><span class='hs-layout'>)</span> <span class='hs-num'>1</span> <span class='hs-num'>1</span> <span class='hs-num'>0</span> <span class='hs-varid'>copyFromParent</span> <span class='hs-varid'>copyFromParent</span> <span class='hs-varid'>visual</span> <span class='hs-varid'>attrmask</span> <span class='hs-varid'>attributes</span>
<a name="line-99"></a>
<a name="line-100"></a> <span class='hs-comment'>-- try to acquire wmSnAtom, this should signal the old WM to terminate</span>
<a name="line-101"></a> <span class='hs-varid'>putStrLn</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Replacing existing window manager..."</span>
<a name="line-102"></a> <span class='hs-varid'>xSetSelectionOwner</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>wmSnAtom</span> <span class='hs-varid'>netWmSnOwner</span> <span class='hs-varid'>currentTime</span>
<a name="line-103"></a>
<a name="line-104"></a> <span class='hs-comment'>-- SKIPPED: check if we acquired the selection</span>
<a name="line-105"></a> <span class='hs-comment'>-- SKIPPED: send client message indicating that we are now the WM</span>
<a name="line-106"></a>
<a name="line-107"></a> <span class='hs-comment'>-- wait for old WM to go away</span>
<a name="line-108"></a> <span class='hs-varid'>putStr</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Waiting for other window manager to terminate... "</span>
<a name="line-109"></a> <span class='hs-varid'>fix</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>again</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-110"></a> <span class='hs-varid'>evt</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>allocaXEvent</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>event</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-111"></a> <span class='hs-varid'>windowEvent</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>currentWmSnOwner</span> <span class='hs-varid'>structureNotifyMask</span> <span class='hs-varid'>event</span>
<a name="line-112"></a> <span class='hs-varid'>get_EventType</span> <span class='hs-varid'>event</span>
<a name="line-113"></a>
<a name="line-114"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>evt</span> <span class='hs-varop'>/=</span> <span class='hs-varid'>destroyNotify</span><span class='hs-layout'>)</span> <span class='hs-varid'>again</span>
<a name="line-115"></a> <span class='hs-varid'>putStrLn</span> <span class='hs-varop'>$</span> <span class='hs-str'>"done"</span>
<a name="line-116"></a> <span class='hs-varid'>closeDisplay</span> <span class='hs-varid'>dpy</span>
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