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<title>XMonad/Hooks/FadeWindows.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE FlexibleInstances, TypeSynonymInstances #-}</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.Hooks.FadeWindows</span>
<a name="line-5"></a><span class='hs-comment'>-- Copyright : Brandon S Allbery KF8NH <allbery.b@gmail.com></span>
<a name="line-6"></a><span class='hs-comment'>-- License : BSD</span>
<a name="line-7"></a><span class='hs-comment'>--</span>
<a name="line-8"></a><span class='hs-comment'>-- Maintainer : Brandon S Allbery KF8NH</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'>-- A more flexible and general compositing interface than FadeInactive.</span>
<a name="line-13"></a><span class='hs-comment'>-- Windows can be selected and opacity specified by means of FadeHooks,</span>
<a name="line-14"></a><span class='hs-comment'>-- which are very similar to ManageHooks and use the same machinery.</span>
<a name="line-15"></a><span class='hs-comment'>--</span>
<a name="line-16"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-17"></a>
<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'>Hooks</span><span class='hs-varop'>.</span><span class='hs-conid'>FadeWindows</span> <span class='hs-layout'>(</span><span class='hs-comment'>-- * Usage</span>
<a name="line-19"></a> <span class='hs-comment'>-- $usage</span>
<a name="line-20"></a>
<a name="line-21"></a> <span class='hs-comment'>-- * The 'logHook' for window fading</span>
<a name="line-22"></a> <span class='hs-varid'>fadeWindowsLogHook</span>
<a name="line-23"></a>
<a name="line-24"></a> <span class='hs-comment'>-- * The 'FadeHook'</span>
<a name="line-25"></a> <span class='hs-layout'>,</span><span class='hs-conid'>FadeHook</span>
<a name="line-26"></a> <span class='hs-layout'>,</span><span class='hs-conid'>Opacity</span>
<a name="line-27"></a> <span class='hs-layout'>,</span><span class='hs-varid'>idFadeHook</span>
<a name="line-28"></a>
<a name="line-29"></a> <span class='hs-comment'>-- * Predefined 'FadeHook's</span>
<a name="line-30"></a> <span class='hs-layout'>,</span><span class='hs-varid'>opaque</span>
<a name="line-31"></a> <span class='hs-layout'>,</span><span class='hs-varid'>solid</span>
<a name="line-32"></a> <span class='hs-layout'>,</span><span class='hs-varid'>transparent</span>
<a name="line-33"></a> <span class='hs-layout'>,</span><span class='hs-varid'>invisible</span>
<a name="line-34"></a> <span class='hs-layout'>,</span><span class='hs-varid'>transparency</span>
<a name="line-35"></a> <span class='hs-layout'>,</span><span class='hs-varid'>translucence</span>
<a name="line-36"></a> <span class='hs-layout'>,</span><span class='hs-varid'>fadeBy</span>
<a name="line-37"></a> <span class='hs-layout'>,</span><span class='hs-varid'>opacity</span>
<a name="line-38"></a> <span class='hs-layout'>,</span><span class='hs-varid'>fadeTo</span>
<a name="line-39"></a>
<a name="line-40"></a> <span class='hs-comment'>-- * 'handleEventHook' for mapped/unmapped windows</span>
<a name="line-41"></a> <span class='hs-layout'>,</span><span class='hs-varid'>fadeWindowsEventHook</span>
<a name="line-42"></a>
<a name="line-43"></a> <span class='hs-comment'>-- * 'doF' for simple hooks</span>
<a name="line-44"></a> <span class='hs-layout'>,</span><span class='hs-varid'>doS</span>
<a name="line-45"></a>
<a name="line-46"></a> <span class='hs-comment'>-- * Useful 'Query's for 'FadeHook's</span>
<a name="line-47"></a> <span class='hs-layout'>,</span><span class='hs-varid'>isFloating</span>
<a name="line-48"></a> <span class='hs-layout'>,</span><span class='hs-varid'>isUnfocused</span>
<a name="line-49"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-50"></a>
<a name="line-51"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Core</span>
<a name="line-52"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>ManageHook</span> <span class='hs-layout'>(</span><span class='hs-varid'>liftX</span><span class='hs-layout'>)</span>
<a name="line-53"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>StackSet</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>W</span>
<a name="line-54"></a>
<a name="line-55"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Hooks</span><span class='hs-varop'>.</span><span class='hs-conid'>FadeInactive</span> <span class='hs-layout'>(</span><span class='hs-varid'>setOpacity</span>
<a name="line-56"></a> <span class='hs-layout'>,</span><span class='hs-varid'>isUnfocused</span>
<a name="line-57"></a> <span class='hs-layout'>)</span>
<a name="line-58"></a>
<a name="line-59"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span> <span class='hs-layout'>(</span><span class='hs-varid'>forM_</span><span class='hs-layout'>)</span>
<a name="line-60"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>Reader</span> <span class='hs-layout'>(</span><span class='hs-varid'>ask</span>
<a name="line-61"></a> <span class='hs-layout'>,</span><span class='hs-varid'>asks</span><span class='hs-layout'>)</span>
<a name="line-62"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>State</span> <span class='hs-layout'>(</span><span class='hs-varid'>gets</span><span class='hs-layout'>)</span>
<a name="line-63"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Map</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>M</span>
<a name="line-64"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Monoid</span>
<a name="line-65"></a>
<a name="line-66"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>X11</span><span class='hs-varop'>.</span><span class='hs-conid'>Xlib</span><span class='hs-varop'>.</span><span class='hs-conid'>Extras</span> <span class='hs-layout'>(</span><span class='hs-conid'>Event</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-67"></a>
<a name="line-68"></a><span class='hs-comment'>-- $usage</span>
<a name="line-69"></a><span class='hs-comment'>-- To use this module, make sure your @xmonad@ core supports generalized</span>
<a name="line-70"></a><span class='hs-comment'>-- 'ManageHook's (check the type of 'idHook'; if it's @ManageHook@ then</span>
<a name="line-71"></a><span class='hs-comment'>-- your @xmonad@ is too old) and then add @fadeWindowsLogHook@ to your</span>
<a name="line-72"></a><span class='hs-comment'>-- 'logHook' and @fadeWindowsEventHook@ to your 'handleEventHook':</span>
<a name="line-73"></a><span class='hs-comment'>--</span>
<a name="line-74"></a><span class='hs-comment'>-- > , logHook = fadeWindowsLogHook myFadeHook</span>
<a name="line-75"></a><span class='hs-comment'>-- > , handleEventHook = fadeWindowsEventHook</span>
<a name="line-76"></a><span class='hs-comment'>-- > {- ... -}</span>
<a name="line-77"></a><span class='hs-comment'>-- ></span>
<a name="line-78"></a><span class='hs-comment'>-- > myFadeHook = composeAll [isUnfocused --> transparency 0.2</span>
<a name="line-79"></a><span class='hs-comment'>-- > , opaque</span>
<a name="line-80"></a><span class='hs-comment'>-- > ]</span>
<a name="line-81"></a><span class='hs-comment'>--</span>
<a name="line-82"></a><span class='hs-comment'>-- The above is like FadeInactive with a fade value of 0.2.</span>
<a name="line-83"></a><span class='hs-comment'>--</span>
<a name="line-84"></a><span class='hs-comment'>-- FadeHooks do not accumulate; instead, they compose from right to</span>
<a name="line-85"></a><span class='hs-comment'>-- left like 'ManageHook's, so the above example @myFadeHook@ will</span>
<a name="line-86"></a><span class='hs-comment'>-- render unfocused windows at 4/5 opacity and the focused window</span>
<a name="line-87"></a><span class='hs-comment'>-- as opaque. The 'opaque' hook above is optional, by the way, as any</span>
<a name="line-88"></a><span class='hs-comment'>-- unmatched window will be opaque by default.</span>
<a name="line-89"></a><span class='hs-comment'>--</span>
<a name="line-90"></a><span class='hs-comment'>-- This module is best used with "XMonad.Hooks.MoreManageHelpers", which</span>
<a name="line-91"></a><span class='hs-comment'>-- exports a number of Queries that can be used in either @ManageHook@</span>
<a name="line-92"></a><span class='hs-comment'>-- or @FadeHook@.</span>
<a name="line-93"></a><span class='hs-comment'>--</span>
<a name="line-94"></a><span class='hs-comment'>-- Note that you need a compositing manager such as @xcompmgr@,</span>
<a name="line-95"></a><span class='hs-comment'>-- @dcompmgr@, or @cairo-compmgr@ for window fading to work. If you</span>
<a name="line-96"></a><span class='hs-comment'>-- aren't running a compositing manager, the opacity will be recorded</span>
<a name="line-97"></a><span class='hs-comment'>-- but won't take effect until a compositing manager is started.</span>
<a name="line-98"></a><span class='hs-comment'>--</span>
<a name="line-99"></a><span class='hs-comment'>-- For more detailed instructions on editing the 'logHook' see:</span>
<a name="line-100"></a><span class='hs-comment'>--</span>
<a name="line-101"></a><span class='hs-comment'>-- "XMonad.Doc.Extending#The_log_hook_and_external_status_bars"</span>
<a name="line-102"></a><span class='hs-comment'>--</span>
<a name="line-103"></a><span class='hs-comment'>-- For more detailed instructions on editing the 'handleEventHook',</span>
<a name="line-104"></a><span class='hs-comment'>-- see:</span>
<a name="line-105"></a><span class='hs-comment'>--</span>
<a name="line-106"></a><span class='hs-comment'>-- "XMonad.Doc.Extending#Editing_the_event_hook"</span>
<a name="line-107"></a><span class='hs-comment'>-- (which sadly doesnt exist at the time of writing...)</span>
<a name="line-108"></a><span class='hs-comment'>--</span>
<a name="line-109"></a><span class='hs-comment'>-- /WARNING:/ This module is very good at triggering bugs in</span>
<a name="line-110"></a><span class='hs-comment'>-- compositing managers. Symptoms range from windows not being</span>
<a name="line-111"></a><span class='hs-comment'>-- repainted until the compositing manager is restarted or the</span>
<a name="line-112"></a><span class='hs-comment'>-- window is unmapped and remapped, to the machine becoming sluggish</span>
<a name="line-113"></a><span class='hs-comment'>-- until the compositing manager is restarted (at which point a</span>
<a name="line-114"></a><span class='hs-comment'>-- popup/dialog will suddenly appear; apparently it's getting into</span>
<a name="line-115"></a><span class='hs-comment'>-- a tight loop trying to fade the popup in). I find it useful to</span>
<a name="line-116"></a><span class='hs-comment'>-- have a key binding to restart the compositing manager; for example,</span>
<a name="line-117"></a><span class='hs-comment'>--</span>
<a name="line-118"></a><span class='hs-comment'>-- main = xmonad $ defaultConfig {</span>
<a name="line-119"></a><span class='hs-comment'>-- {- ... -}</span>
<a name="line-120"></a><span class='hs-comment'>-- }</span>
<a name="line-121"></a><span class='hs-comment'>-- `additionalKeysP`</span>
<a name="line-122"></a><span class='hs-comment'>-- [("M-S-4",spawn "killall xcompmgr; sleep 1; xcompmgr -cCfF &")]</span>
<a name="line-123"></a><span class='hs-comment'>-- {- ... -}</span>
<a name="line-124"></a><span class='hs-comment'>-- ]</span>
<a name="line-125"></a><span class='hs-comment'>--</span>
<a name="line-126"></a><span class='hs-comment'>-- (See "XMonad.Util.EZConfig" for 'additionalKeysP'.)</span>
<a name="line-127"></a>
<a name="line-128"></a><a name="Opacity"></a><span class='hs-comment'>-- a window opacity to be carried in a Query. OEmpty is sort of a hack</span>
<a name="line-129"></a><a name="Opacity"></a><span class='hs-comment'>-- to make it obay the monoid laws</span>
<a name="line-130"></a><a name="Opacity"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Opacity</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Opacity</span> <span class='hs-conid'>Rational</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>OEmpty</span>
<a name="line-131"></a>
<a name="line-132"></a><a name="instance%20Monoid%20Opacity"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Monoid</span> <span class='hs-conid'>Opacity</span> <span class='hs-keyword'>where</span>
<a name="line-133"></a> <span class='hs-varid'>mempty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>OEmpty</span>
<a name="line-134"></a> <span class='hs-varid'>r</span> <span class='hs-varop'>`mappend`</span> <span class='hs-conid'>OEmpty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>r</span>
<a name="line-135"></a> <span class='hs-keyword'>_</span> <span class='hs-varop'>`mappend`</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>r</span>
<a name="line-136"></a>
<a name="line-137"></a><a name="FadeHook"></a><span class='hs-comment'>-- | A FadeHook is similar to a ManageHook, but records window opacity.</span>
<a name="line-138"></a><a name="FadeHook"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>FadeHook</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Query</span> <span class='hs-conid'>Opacity</span>
<a name="line-139"></a>
<a name="line-140"></a><a name="opaque"></a><span class='hs-comment'>-- | Render a window fully opaque.</span>
<a name="line-141"></a><span class='hs-definition'>opaque</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FadeHook</span>
<a name="line-142"></a><span class='hs-definition'>opaque</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doS</span> <span class='hs-layout'>(</span><span class='hs-conid'>Opacity</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span>
<a name="line-143"></a>
<a name="line-144"></a><a name="transparent"></a><span class='hs-comment'>-- | Render a window fully transparent.</span>
<a name="line-145"></a><span class='hs-definition'>transparent</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FadeHook</span>
<a name="line-146"></a><span class='hs-definition'>transparent</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doS</span> <span class='hs-layout'>(</span><span class='hs-conid'>Opacity</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span>
<a name="line-147"></a>
<a name="line-148"></a><a name="transparency"></a><span class='hs-comment'>-- | Specify a window's transparency.</span>
<a name="line-149"></a><span class='hs-definition'>transparency</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Rational</span> <span class='hs-comment'>-- ^ The window's transparency as a fraction.</span>
<a name="line-150"></a> <span class='hs-comment'>-- @transparency 1@ is the same as 'transparent',</span>
<a name="line-151"></a> <span class='hs-comment'>-- whereas @transparency 0@ is the same as 'opaque'.</span>
<a name="line-152"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FadeHook</span>
<a name="line-153"></a><span class='hs-definition'>transparency</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doS</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Opacity</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-num'>1</span><span class='hs-comment'>-</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>clampRatio</span>
<a name="line-154"></a>
<a name="line-155"></a><a name="opacity"></a><span class='hs-comment'>-- | Specify a window's opacity; this is the inverse of 'transparency'.</span>
<a name="line-156"></a><span class='hs-definition'>opacity</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Rational</span> <span class='hs-comment'>-- ^ The opacity of a window as a fraction.</span>
<a name="line-157"></a> <span class='hs-comment'>-- @opacity 1@ is the same as 'opaque',</span>
<a name="line-158"></a> <span class='hs-comment'>-- whereas @opacity 0@ is the same as 'transparent'.</span>
<a name="line-159"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FadeHook</span>
<a name="line-160"></a><span class='hs-definition'>opacity</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doS</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Opacity</span> <span class='hs-varop'>.</span> <span class='hs-varid'>clampRatio</span>
<a name="line-161"></a>
<a name="line-162"></a><a name="fadeTo"></a><span class='hs-definition'>fadeTo</span><span class='hs-layout'>,</span> <span class='hs-varid'>translucence</span><span class='hs-layout'>,</span> <span class='hs-varid'>fadeBy</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Rational</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FadeHook</span>
<a name="line-163"></a><span class='hs-comment'>-- ^ An alias for 'transparency'.</span>
<a name="line-164"></a><span class='hs-definition'>fadeTo</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>transparency</span>
<a name="line-165"></a><a name="translucence"></a><span class='hs-comment'>-- ^ An alias for 'transparency'.</span>
<a name="line-166"></a><span class='hs-definition'>translucence</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>transparency</span>
<a name="line-167"></a><a name="fadeBy"></a><span class='hs-comment'>-- ^ An alias for 'transparency'.</span>
<a name="line-168"></a><span class='hs-definition'>fadeBy</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>opacity</span>
<a name="line-169"></a>
<a name="line-170"></a><a name="invisible"></a><span class='hs-definition'>invisible</span><span class='hs-layout'>,</span> <span class='hs-varid'>solid</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FadeHook</span>
<a name="line-171"></a><span class='hs-comment'>-- ^ An alias for 'transparent'.</span>
<a name="line-172"></a><span class='hs-definition'>invisible</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>transparent</span>
<a name="line-173"></a><a name="solid"></a><span class='hs-comment'>-- ^ An alias for 'opaque'.</span>
<a name="line-174"></a><span class='hs-definition'>solid</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>opaque</span>
<a name="line-175"></a>
<a name="line-176"></a><a name="doS"></a><span class='hs-comment'>-- | Like 'doF', but usable with 'ManageHook'-like hooks that</span>
<a name="line-177"></a><span class='hs-comment'>-- aren't 'Query' wrapped around transforming functions ('Endo').</span>
<a name="line-178"></a><span class='hs-definition'>doS</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monoid</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Query</span> <span class='hs-varid'>m</span>
<a name="line-179"></a><span class='hs-definition'>doS</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span>
<a name="line-180"></a>
<a name="line-181"></a><a name="idFadeHook"></a><span class='hs-comment'>-- | The identity 'FadeHook', which renders windows 'opaque'.</span>
<a name="line-182"></a><span class='hs-definition'>idFadeHook</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FadeHook</span>
<a name="line-183"></a><span class='hs-definition'>idFadeHook</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>opaque</span>
<a name="line-184"></a>
<a name="line-185"></a><a name="isFloating"></a><span class='hs-comment'>-- | A Query to determine if a window is floating.</span>
<a name="line-186"></a><span class='hs-definition'>isFloating</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Query</span> <span class='hs-conid'>Bool</span>
<a name="line-187"></a><span class='hs-definition'>isFloating</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ask</span> <span class='hs-varop'>>>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>w</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>liftX</span> <span class='hs-varop'>.</span> <span class='hs-varid'>gets</span> <span class='hs-varop'>$</span> <span class='hs-conid'>M</span><span class='hs-varop'>.</span><span class='hs-varid'>member</span> <span class='hs-varid'>w</span> <span class='hs-varop'>.</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>floating</span> <span class='hs-varop'>.</span> <span class='hs-varid'>windowset</span>
<a name="line-188"></a>
<a name="line-189"></a><span class='hs-comment'>-- boring windows can't be seen outside of a layout, so we watch messages with</span>
<a name="line-190"></a><span class='hs-comment'>-- a dummy LayoutModifier and stow them in a persistent bucket. this is not</span>
<a name="line-191"></a><span class='hs-comment'>-- entirely reliable given that boringAuto still isn't observable; we just hope</span>
<a name="line-192"></a><span class='hs-comment'>-- those aren't visible and won;t be affected anyway</span>
<a name="line-193"></a><span class='hs-comment'>-- @@@ punted for now, will be a separate module. it's still slimy, though</span>
<a name="line-194"></a>
<a name="line-195"></a><a name="fadeWindowsLogHook"></a><span class='hs-comment'>-- | A 'logHook' to fade windows under control of a 'FadeHook', which is</span>
<a name="line-196"></a><span class='hs-comment'>-- similar to but not identical to 'ManageHook'.</span>
<a name="line-197"></a><span class='hs-definition'>fadeWindowsLogHook</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FadeHook</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-conid'>()</span>
<a name="line-198"></a><span class='hs-definition'>fadeWindowsLogHook</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withWindowSet</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-199"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>visibleWins</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>integrate'</span> <span class='hs-varop'>.</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>stack</span> <span class='hs-varop'>.</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>workspace</span> <span class='hs-varop'>.</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>current</span> <span class='hs-varop'>$</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span>
<a name="line-200"></a> <span class='hs-varid'>concatMap</span> <span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>integrate'</span> <span class='hs-varop'>.</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>stack</span> <span class='hs-varop'>.</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>workspace</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>visible</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-201"></a> <span class='hs-varid'>forM_</span> <span class='hs-varid'>visibleWins</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>w</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-202"></a> <span class='hs-varid'>o</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>userCodeDef</span> <span class='hs-layout'>(</span><span class='hs-conid'>Opacity</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>runQuery</span> <span class='hs-varid'>h</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span>
<a name="line-203"></a> <span class='hs-varid'>setOpacity</span> <span class='hs-varid'>w</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>o</span> <span class='hs-keyword'>of</span>
<a name="line-204"></a> <span class='hs-conid'>OEmpty</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0.93</span>
<a name="line-205"></a> <span class='hs-conid'>Opacity</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>r</span>
<a name="line-206"></a>
<a name="line-207"></a><a name="fadeWindowsEventHook"></a><span class='hs-comment'>-- | A 'handleEventHook' to handle fading and unfading of newly mapped</span>
<a name="line-208"></a><span class='hs-comment'>-- or unmapped windows; this avoids problems with layouts such as</span>
<a name="line-209"></a><span class='hs-comment'>-- "XMonad.Layout.Full" or "XMonad.Layout.Tabbed". This hook may</span>
<a name="line-210"></a><span class='hs-comment'>-- also be useful with "XMonad.Hooks.FadeInactive".</span>
<a name="line-211"></a><span class='hs-definition'>fadeWindowsEventHook</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Event</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-conid'>All</span>
<a name="line-212"></a><span class='hs-definition'>fadeWindowsEventHook</span> <span class='hs-layout'>(</span><span class='hs-conid'>MapNotifyEvent</span> <span class='hs-layout'>{</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-213"></a> <span class='hs-comment'>-- we need to run the fadeWindowsLogHook. only one way...</span>
<a name="line-214"></a> <span class='hs-varid'>asks</span> <span class='hs-varid'>config</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>logHook</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>All</span> <span class='hs-conid'>True</span><span class='hs-layout'>)</span>
<a name="line-215"></a><span class='hs-definition'>fadeWindowsEventHook</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>All</span> <span class='hs-conid'>True</span><span class='hs-layout'>)</span>
<a name="line-216"></a>
<a name="line-217"></a><a name="clampRatio"></a><span class='hs-comment'>-- A utility to clamp opacity fractions to the range (0,1)</span>
<a name="line-218"></a><span class='hs-definition'>clampRatio</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Rational</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rational</span>
<a name="line-219"></a><span class='hs-definition'>clampRatio</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>r</span> <span class='hs-varop'>>=</span> <span class='hs-num'>0</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>r</span> <span class='hs-varop'><=</span> <span class='hs-num'>1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>r</span>
<a name="line-220"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>r</span> <span class='hs-varop'><</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span>
<a name="line-221"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>1</span>
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