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<title>XMonad/Layout/TrackFloating.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE MultiParamTypeClasses, PatternGuards, TypeSynonymInstances #-}</span>
<a name="line-2"></a><span class='hs-comment'>{- |
<a name="line-3"></a>
<a name="line-4"></a>Module : XMonad.Layout.TrackFloating
<a name="line-5"></a>Copyright : (c) 2010 Adam Vogt
<a name="line-6"></a>License : BSD-style (see xmonad/LICENSE)
<a name="line-7"></a>
<a name="line-8"></a>Maintainer : vogt.adam@gmail.com
<a name="line-9"></a>Stability : unstable
<a name="line-10"></a>Portability : unportable
<a name="line-11"></a>
<a name="line-12"></a>Layout modifier that tracks focus in the tiled layer while the floating layer
<a name="line-13"></a>is in use. This is particularly helpful for tiled layouts where the focus
<a name="line-14"></a>determines what is visible.
<a name="line-15"></a>
<a name="line-16"></a>The relevant bug is Issue 4
<a name="line-17"></a><<a href="http://code.google.com/p/xmonad/issues/detail?id=4">http://code.google.com/p/xmonad/issues/detail?id=4</a>>.
<a name="line-18"></a>-}</span>
<a name="line-19"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Layout</span><span class='hs-varop'>.</span><span class='hs-conid'>TrackFloating</span>
<a name="line-20"></a> <span class='hs-layout'>(</span><span class='hs-comment'>-- * Usage</span>
<a name="line-21"></a> <span class='hs-comment'>-- $usage</span>
<a name="line-22"></a>
<a name="line-23"></a> <span class='hs-comment'>-- ** For other layout modifiers</span>
<a name="line-24"></a> <span class='hs-comment'>-- $layoutModifier</span>
<a name="line-25"></a> <span class='hs-varid'>trackFloating</span><span class='hs-layout'>,</span>
<a name="line-26"></a> <span class='hs-conid'>TrackFloating</span><span class='hs-layout'>,</span>
<a name="line-27"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-28"></a>
<a name="line-29"></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-30"></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-31"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span>
<a name="line-32"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Maybe</span>
<a name="line-33"></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-34"></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'>Set</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>S</span>
<a name="line-35"></a>
<a name="line-36"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span>
<a name="line-37"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Layout</span><span class='hs-varop'>.</span><span class='hs-conid'>LayoutModifier</span>
<a name="line-38"></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-39"></a>
<a name="line-40"></a>
<a name="line-41"></a><a name="TrackFloating"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>TrackFloating</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TrackFloating</span>
<a name="line-42"></a> <span class='hs-layout'>{</span> <span class='hs-sel'>_wasFloating</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span><span class='hs-layout'>,</span>
<a name="line-43"></a> <span class='hs-sel'>_tiledFocus</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Window</span> <span class='hs-layout'>}</span>
<a name="line-44"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Read</span><span class='hs-layout'>,</span><span class='hs-conid'>Show</span><span class='hs-layout'>,</span><span class='hs-conid'>Eq</span><span class='hs-layout'>)</span>
<a name="line-45"></a>
<a name="line-46"></a>
<a name="line-47"></a><a name="instance%20LayoutModifier%20TrackFloating%20Window"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>LayoutModifier</span> <span class='hs-conid'>TrackFloating</span> <span class='hs-conid'>Window</span> <span class='hs-keyword'>where</span>
<a name="line-48"></a> <span class='hs-varid'>modifyLayoutWithUpdate</span> <span class='hs-varid'>os</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>TrackFloating</span> <span class='hs-sel'>_wasF</span> <span class='hs-varid'>mw</span><span class='hs-layout'>)</span> <span class='hs-varid'>ws</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-conid'>Workspace</span><span class='hs-layout'>{</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>stack</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ms</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span>
<a name="line-49"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-50"></a> <span class='hs-varid'>winset</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>gets</span> <span class='hs-varid'>windowset</span>
<a name="line-51"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>xCur</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>focus</span> <span class='hs-varid'>xStack</span>
<a name="line-52"></a> <span class='hs-varid'>xStack</span> <span class='hs-keyglyph'>=</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-varid'>winset</span>
<a name="line-53"></a> <span class='hs-varid'>isF</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>x</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-varop'>`</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>floating</span> <span class='hs-varid'>winset</span> <span class='hs-varop'>||</span>
<a name="line-54"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varop'>\\\</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>S</span><span class='hs-varop'>.\\</span><span class='hs-layout'>)</span> <span class='hs-varop'>`on`</span> <span class='hs-layout'>(</span><span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>fromList</span> <span class='hs-varop'>.</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>integrate'</span><span class='hs-layout'>)</span>
<a name="line-55"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>x</span> <span class='hs-varop'>`</span><span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>member</span><span class='hs-varop'>`</span> <span class='hs-layout'>(</span><span class='hs-varid'>xStack</span> <span class='hs-varop'>\\\</span> <span class='hs-varid'>ms</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-56"></a> <span class='hs-varid'>xCur</span>
<a name="line-57"></a> <span class='hs-varid'>newStack</span>
<a name="line-58"></a> <span class='hs-comment'>-- focus is floating, so use the remembered focus point</span>
<a name="line-59"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>isF'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>isF</span><span class='hs-layout'>,</span>
<a name="line-60"></a> <span class='hs-varid'>isF'</span><span class='hs-layout'>,</span>
<a name="line-61"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mw</span><span class='hs-layout'>,</span>
<a name="line-62"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ms</span><span class='hs-layout'>,</span>
<a name="line-63"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>ns</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>find</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>==</span><span class='hs-layout'>)</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'>focus</span><span class='hs-layout'>)</span>
<a name="line-64"></a> <span class='hs-varop'>$</span> <span class='hs-varid'>zipWith</span> <span class='hs-varid'>const</span> <span class='hs-layout'>(</span><span class='hs-varid'>iterate</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>focusDown'</span> <span class='hs-varid'>s</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'>integrate</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-65"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>ns</span>
<a name="line-66"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span>
<a name="line-67"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ms</span>
<a name="line-68"></a> <span class='hs-varid'>newState</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>isF</span> <span class='hs-keyword'>of</span>
<a name="line-69"></a> <span class='hs-conid'>Just</span> <span class='hs-conid'>True</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>mw</span>
<a name="line-70"></a> <span class='hs-conid'>Just</span> <span class='hs-conid'>False</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>xCur</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-varid'>f</span>
<a name="line-71"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Nothing</span>
<a name="line-72"></a> <span class='hs-varid'>ran</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>runLayout</span> <span class='hs-varid'>ws</span><span class='hs-layout'>{</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>stack</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>newStack</span> <span class='hs-layout'>}</span> <span class='hs-varid'>r</span>
<a name="line-73"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>ran</span><span class='hs-layout'>,</span>
<a name="line-74"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TrackFloating</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromMaybe</span> <span class='hs-conid'>False</span> <span class='hs-varid'>isF</span><span class='hs-layout'>)</span> <span class='hs-varid'>newState</span>
<a name="line-75"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>guard</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span> <span class='hs-varop'>/=</span> <span class='hs-varid'>os</span><span class='hs-layout'>)</span> <span class='hs-varop'>>></span> <span class='hs-conid'>Just</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span>
<a name="line-76"></a>
<a name="line-77"></a>
<a name="line-78"></a><span class='hs-comment'>{- $usage
<a name="line-79"></a>
<a name="line-80"></a>Apply to your layout in a config like:
<a name="line-81"></a>
<a name="line-82"></a>> main = xmonad (defaultConfig{
<a name="line-83"></a>> layoutHook = trackFloating
<a name="line-84"></a>> (noBorders Full ||| Tall 1 0.3 0.5),
<a name="line-85"></a>> ...
<a name="line-86"></a>> })
<a name="line-87"></a>
<a name="line-88"></a>-}</span>
<a name="line-89"></a>
<a name="line-90"></a><a name="trackFloating"></a><span class='hs-comment'>{- | Runs another layout with a remembered focus, provided:
<a name="line-91"></a>
<a name="line-92"></a>* the subset of windows doesn't include the focus in XState
<a name="line-93"></a>
<a name="line-94"></a>* it was previously run with a subset that included the XState focus
<a name="line-95"></a>
<a name="line-96"></a>* the remembered focus hasn't since been killed
<a name="line-97"></a>
<a name="line-98"></a>-}</span>
<a name="line-99"></a><span class='hs-definition'>trackFloating</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ModifiedLayout</span> <span class='hs-conid'>TrackFloating</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span>
<a name="line-100"></a><span class='hs-definition'>trackFloating</span> <span class='hs-varid'>layout</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ModifiedLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>TrackFloating</span> <span class='hs-conid'>False</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-varid'>layout</span>
<a name="line-101"></a>
<a name="line-102"></a><span class='hs-comment'>{- $layoutModifier
<a name="line-103"></a>It also corrects focus issues for full-like layouts inside other layout
<a name="line-104"></a>modifiers:
<a name="line-105"></a>
<a name="line-106"></a>> import XMonad.Layout.IM
<a name="line-107"></a>> import XMonad.Layout.Tabbed
<a name="line-108"></a>> import XMonad.Layout.TrackFloating
<a name="line-109"></a>> import XMonad.Layout.Reflect
<a name="line-110"></a>
<a name="line-111"></a>> gimpLayout = withIM 0.11 (Role "gimp-toolbox") $ reflectHoriz
<a name="line-112"></a>> $ withIM 0.15 (Role "gimp-dock") (trackFloating simpleTabbed)
<a name="line-113"></a>
<a name="line-114"></a>Interactions with some layout modifiers (ex. decorations, minimizing) are
<a name="line-115"></a>unknown but likely unpleasant.
<a name="line-116"></a>-}</span>
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