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<title>XMonad/Layout/BoringWindows.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE TypeSynonymInstances, MultiParamTypeClasses, DeriveDataTypeable #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# LANGUAGE PatternGuards, FlexibleContexts, FlexibleInstances #-}</span>
<a name="line-3"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-4"></a><span class='hs-comment'>-- |</span>
<a name="line-5"></a><span class='hs-comment'>-- Module : XMonad.Layout.BoringWindows</span>
<a name="line-6"></a><span class='hs-comment'>-- Copyright : (c) 2008 David Roundy <droundy@darcs.net></span>
<a name="line-7"></a><span class='hs-comment'>-- License : BSD3-style (see LICENSE)</span>
<a name="line-8"></a><span class='hs-comment'>--</span>
<a name="line-9"></a><span class='hs-comment'>-- Maintainer : none</span>
<a name="line-10"></a><span class='hs-comment'>-- Stability : unstable</span>
<a name="line-11"></a><span class='hs-comment'>-- Portability : unportable</span>
<a name="line-12"></a><span class='hs-comment'>--</span>
<a name="line-13"></a><span class='hs-comment'>-- BoringWindows is an extension to allow windows to be marked boring</span>
<a name="line-14"></a><span class='hs-comment'>--</span>
<a name="line-15"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-16"></a>
<a name="line-17"></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'>BoringWindows</span> <span class='hs-layout'>(</span>
<a name="line-18"></a> <span class='hs-comment'>-- * Usage</span>
<a name="line-19"></a> <span class='hs-comment'>-- $usage</span>
<a name="line-20"></a> <span class='hs-varid'>boringWindows</span><span class='hs-layout'>,</span> <span class='hs-varid'>boringAuto</span><span class='hs-layout'>,</span>
<a name="line-21"></a> <span class='hs-varid'>markBoring</span><span class='hs-layout'>,</span> <span class='hs-varid'>clearBoring</span><span class='hs-layout'>,</span>
<a name="line-22"></a> <span class='hs-varid'>focusUp</span><span class='hs-layout'>,</span> <span class='hs-varid'>focusDown</span><span class='hs-layout'>,</span> <span class='hs-varid'>focusMaster</span><span class='hs-layout'>,</span>
<a name="line-23"></a>
<a name="line-24"></a> <span class='hs-conid'>UpdateBoring</span><span class='hs-layout'>(</span><span class='hs-conid'>UpdateBoring</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-25"></a> <span class='hs-conid'>BoringMessage</span><span class='hs-layout'>(</span><span class='hs-conid'>Replace</span><span class='hs-layout'>,</span><span class='hs-conid'>Merge</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-26"></a> <span class='hs-conid'>BoringWindows</span><span class='hs-conid'>()</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'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Layout</span><span class='hs-varop'>.</span><span class='hs-conid'>LayoutModifier</span><span class='hs-layout'>(</span><span class='hs-conid'>ModifiedLayout</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-30"></a> <span class='hs-conid'>LayoutModifier</span><span class='hs-layout'>(</span><span class='hs-varid'>handleMessOrMaybeModifyIt</span><span class='hs-layout'>,</span> <span class='hs-varid'>redoLayout</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-31"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span><span class='hs-layout'>(</span><span class='hs-conid'>Typeable</span><span class='hs-layout'>,</span> <span class='hs-conid'>LayoutClass</span><span class='hs-layout'>,</span> <span class='hs-conid'>Message</span><span class='hs-layout'>,</span> <span class='hs-conid'>X</span><span class='hs-layout'>,</span> <span class='hs-varid'>fromMessage</span><span class='hs-layout'>,</span>
<a name="line-32"></a> <span class='hs-varid'>sendMessage</span><span class='hs-layout'>,</span> <span class='hs-varid'>windows</span><span class='hs-layout'>,</span> <span class='hs-varid'>withFocused</span><span class='hs-layout'>,</span> <span class='hs-conid'>Window</span><span class='hs-layout'>)</span>
<a name="line-33"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Applicative</span><span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'><$></span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-34"></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-conid'>Monad</span><span class='hs-layout'>(</span><span class='hs-varid'>return</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varop'>>></span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-35"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span><span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>\\</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>union</span><span class='hs-layout'>)</span>
<a name="line-36"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Maybe</span><span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>maybe</span><span class='hs-layout'>,</span> <span class='hs-varid'>fromMaybe</span><span class='hs-layout'>,</span> <span class='hs-varid'>listToMaybe</span><span class='hs-layout'>,</span>
<a name="line-37"></a> <span class='hs-varid'>maybeToList</span><span class='hs-layout'>)</span>
<a name="line-38"></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-39"></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-40"></a>
<a name="line-41"></a><span class='hs-comment'>-- $usage</span>
<a name="line-42"></a><span class='hs-comment'>-- You can use this module with the following in your</span>
<a name="line-43"></a><span class='hs-comment'>-- @~\/.xmonad\/xmonad.hs@:</span>
<a name="line-44"></a><span class='hs-comment'>--</span>
<a name="line-45"></a><span class='hs-comment'>-- > import XMonad.Layout.BoringWindows</span>
<a name="line-46"></a><span class='hs-comment'>--</span>
<a name="line-47"></a><span class='hs-comment'>-- Then edit your @layoutHook@ by adding the layout modifier:</span>
<a name="line-48"></a><span class='hs-comment'>--</span>
<a name="line-49"></a><span class='hs-comment'>-- > myLayout = boringWindows (Full ||| etc..)</span>
<a name="line-50"></a><span class='hs-comment'>-- > main = xmonad defaultConfig { layoutHook = myLayout }</span>
<a name="line-51"></a><span class='hs-comment'>--</span>
<a name="line-52"></a><span class='hs-comment'>-- Then to your keybindings, add:</span>
<a name="line-53"></a><span class='hs-comment'>--</span>
<a name="line-54"></a><span class='hs-comment'>-- > , ((modm, xK_j), focusUp)</span>
<a name="line-55"></a><span class='hs-comment'>-- > , ((modm, xK_k), focusDown)</span>
<a name="line-56"></a><span class='hs-comment'>-- > , ((modm, xK_m), focusMaster)</span>
<a name="line-57"></a><span class='hs-comment'>--</span>
<a name="line-58"></a><span class='hs-comment'>-- For more detailed instructions on editing the layoutHook see:</span>
<a name="line-59"></a><span class='hs-comment'>--</span>
<a name="line-60"></a><span class='hs-comment'>-- "XMonad.Doc.Extending#Editing_the_layout_hook"</span>
<a name="line-61"></a>
<a name="line-62"></a>
<a name="line-63"></a><a name="BoringMessage"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>BoringMessage</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FocusUp</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>FocusDown</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>FocusMaster</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>IsBoring</span> <span class='hs-conid'>Window</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ClearBoring</span>
<a name="line-64"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Replace</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Window</span><span class='hs-keyglyph'>]</span>
<a name="line-65"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Merge</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Window</span><span class='hs-keyglyph'>]</span>
<a name="line-66"></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'>Typeable</span> <span class='hs-layout'>)</span>
<a name="line-67"></a>
<a name="line-68"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Message</span> <span class='hs-conid'>BoringMessage</span>
<a name="line-69"></a>
<a name="line-70"></a><a name="UpdateBoring"></a><span class='hs-comment'>-- | UpdateBoring is sent before attempting to view another boring window, so</span>
<a name="line-71"></a><a name="UpdateBoring"></a><span class='hs-comment'>-- that layouts have a chance to mark boring windows.</span>
<a name="line-72"></a><a name="UpdateBoring"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>UpdateBoring</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>UpdateBoring</span>
<a name="line-73"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Typeable</span><span class='hs-layout'>)</span>
<a name="line-74"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Message</span> <span class='hs-conid'>UpdateBoring</span>
<a name="line-75"></a>
<a name="line-76"></a><a name="markBoring"></a><span class='hs-definition'>markBoring</span><span class='hs-layout'>,</span> <span class='hs-varid'>clearBoring</span><span class='hs-layout'>,</span> <span class='hs-varid'>focusUp</span><span class='hs-layout'>,</span> <span class='hs-varid'>focusDown</span><span class='hs-layout'>,</span> <span class='hs-varid'>focusMaster</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>X</span> <span class='hs-conid'>()</span>
<a name="line-77"></a><span class='hs-definition'>markBoring</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withFocused</span> <span class='hs-layout'>(</span><span class='hs-varid'>sendMessage</span> <span class='hs-varop'>.</span> <span class='hs-conid'>IsBoring</span><span class='hs-layout'>)</span>
<a name="line-78"></a><a name="clearBoring"></a><span class='hs-definition'>clearBoring</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sendMessage</span> <span class='hs-conid'>ClearBoring</span>
<a name="line-79"></a><a name="focusUp"></a><span class='hs-definition'>focusUp</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sendMessage</span> <span class='hs-conid'>UpdateBoring</span> <span class='hs-varop'>>></span> <span class='hs-varid'>sendMessage</span> <span class='hs-conid'>FocusUp</span>
<a name="line-80"></a><a name="focusDown"></a><span class='hs-definition'>focusDown</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sendMessage</span> <span class='hs-conid'>UpdateBoring</span> <span class='hs-varop'>>></span> <span class='hs-varid'>sendMessage</span> <span class='hs-conid'>FocusDown</span>
<a name="line-81"></a><a name="focusMaster"></a><span class='hs-definition'>focusMaster</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sendMessage</span> <span class='hs-conid'>UpdateBoring</span> <span class='hs-varop'>>></span> <span class='hs-varid'>sendMessage</span> <span class='hs-conid'>FocusMaster</span>
<a name="line-82"></a>
<a name="line-83"></a><a name="BoringWindows"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>BoringWindows</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BoringWindows</span>
<a name="line-84"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>namedBoring</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>M</span><span class='hs-varop'>.</span><span class='hs-conid'>Map</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- ^ store borings with a specific source</span>
<a name="line-85"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>chosenBoring</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- ^ user-chosen borings</span>
<a name="line-86"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>hiddenBoring</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Maybe</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- ^ maybe mark hidden windows</span>
<a name="line-87"></a> <span class='hs-layout'>}</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span><span class='hs-layout'>,</span><span class='hs-conid'>Read</span><span class='hs-layout'>,</span><span class='hs-conid'>Typeable</span><span class='hs-layout'>)</span>
<a name="line-88"></a>
<a name="line-89"></a><a name="boringWindows"></a><span class='hs-definition'>boringWindows</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>LayoutClass</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Eq</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</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'>BoringWindows</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span>
<a name="line-90"></a><span class='hs-definition'>boringWindows</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ModifiedLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>BoringWindows</span> <span class='hs-conid'>M</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span> <span class='hs-conid'>[]</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-91"></a>
<a name="line-92"></a><a name="boringAuto"></a><span class='hs-comment'>-- | Mark windows that are not given rectangles as boring</span>
<a name="line-93"></a><span class='hs-definition'>boringAuto</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>LayoutClass</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Eq</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</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'>BoringWindows</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span>
<a name="line-94"></a><span class='hs-definition'>boringAuto</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ModifiedLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>BoringWindows</span> <span class='hs-conid'>M</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span> <span class='hs-conid'>[]</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-95"></a>
<a name="line-96"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>LayoutModifier</span> <span class='hs-conid'>BoringWindows</span> <span class='hs-conid'>Window</span> <span class='hs-keyword'>where</span>
<a name="line-97"></a> <span class='hs-varid'>redoLayout</span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span><span class='hs-keyglyph'>@</span><span class='hs-conid'>BoringWindows</span> <span class='hs-layout'>{</span> <span class='hs-varid'>hiddenBoring</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>bs</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-sel'>_r</span> <span class='hs-varid'>mst</span> <span class='hs-varid'>arrs</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-98"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>bs'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>integrate'</span> <span class='hs-varid'>mst</span> <span class='hs-varop'>\\</span> <span class='hs-varid'>map</span> <span class='hs-varid'>fst</span> <span class='hs-varid'>arrs</span>
<a name="line-99"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>arrs</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>b</span> <span class='hs-layout'>{</span> <span class='hs-varid'>hiddenBoring</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>const</span> <span class='hs-varid'>bs'</span> <span class='hs-varop'><$></span> <span class='hs-varid'>bs</span> <span class='hs-layout'>}</span> <span class='hs-layout'>)</span>
<a name="line-100"></a>
<a name="line-101"></a> <span class='hs-varid'>handleMessOrMaybeModifyIt</span> <span class='hs-varid'>bst</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>BoringWindows</span> <span class='hs-varid'>nbs</span> <span class='hs-varid'>cbs</span> <span class='hs-varid'>lbs</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span>
<a name="line-102"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Replace</span> <span class='hs-varid'>k</span> <span class='hs-varid'>ws</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>m</span>
<a name="line-103"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>maybe</span> <span class='hs-conid'>True</span> <span class='hs-layout'>(</span><span class='hs-varid'>ws</span><span class='hs-varop'>/=</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>M</span><span class='hs-varop'>.</span><span class='hs-varid'>lookup</span> <span class='hs-varid'>k</span> <span class='hs-varid'>nbs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-104"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>nnb</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-varid'>ws</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>M</span><span class='hs-varop'>.</span><span class='hs-varid'>delete</span> <span class='hs-varid'>k</span> <span class='hs-varid'>nbs</span>
<a name="line-105"></a> <span class='hs-keyword'>else</span> <span class='hs-conid'>M</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span> <span class='hs-varid'>k</span> <span class='hs-varid'>ws</span> <span class='hs-varid'>nbs</span>
<a name="line-106"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>rjl</span> <span class='hs-varid'>bst</span> <span class='hs-layout'>{</span> <span class='hs-varid'>namedBoring</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>nnb</span> <span class='hs-layout'>}</span>
<a name="line-107"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Merge</span> <span class='hs-varid'>k</span> <span class='hs-varid'>ws</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>m</span>
<a name="line-108"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>maybe</span> <span class='hs-conid'>True</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-varop'>.</span> <span class='hs-varid'>null</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-varid'>ws</span> <span class='hs-varop'>\\</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>M</span><span class='hs-varop'>.</span><span class='hs-varid'>lookup</span> <span class='hs-varid'>k</span> <span class='hs-varid'>nbs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-109"></a> <span class='hs-varid'>rjl</span> <span class='hs-varid'>bst</span> <span class='hs-layout'>{</span> <span class='hs-varid'>namedBoring</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>M</span><span class='hs-varop'>.</span><span class='hs-varid'>insertWith</span> <span class='hs-varid'>union</span> <span class='hs-varid'>k</span> <span class='hs-varid'>ws</span> <span class='hs-varid'>nbs</span> <span class='hs-layout'>}</span>
<a name="line-110"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>IsBoring</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>m</span> <span class='hs-layout'>,</span> <span class='hs-varid'>w</span> <span class='hs-varop'>`notElem`</span> <span class='hs-varid'>cbs</span> <span class='hs-keyglyph'>=</span>
<a name="line-111"></a> <span class='hs-varid'>rjl</span> <span class='hs-varid'>bst</span> <span class='hs-layout'>{</span> <span class='hs-varid'>chosenBoring</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>w</span><span class='hs-conop'>:</span><span class='hs-varid'>cbs</span> <span class='hs-layout'>}</span>
<a name="line-112"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-conid'>ClearBoring</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-varid'>not</span> <span class='hs-layout'>(</span><span class='hs-varid'>null</span> <span class='hs-varid'>cbs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-113"></a> <span class='hs-varid'>rjl</span> <span class='hs-varid'>bst</span> <span class='hs-layout'>{</span> <span class='hs-varid'>namedBoring</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>M</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span><span class='hs-layout'>,</span> <span class='hs-varid'>chosenBoring</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span><span class='hs-layout'>}</span>
<a name="line-114"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-conid'>FocusUp</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span>
<a name="line-115"></a> <span class='hs-keyword'>do</span> <span class='hs-varid'>windows</span> <span class='hs-varop'>$</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>modify'</span> <span class='hs-varop'>$</span> <span class='hs-varid'>skipBoring</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>focusUp'</span>
<a name="line-116"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-117"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-conid'>FocusDown</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span>
<a name="line-118"></a> <span class='hs-keyword'>do</span> <span class='hs-varid'>windows</span> <span class='hs-varop'>$</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>modify'</span> <span class='hs-varop'>$</span> <span class='hs-varid'>skipBoring</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>focusDown'</span>
<a name="line-119"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-120"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-conid'>FocusMaster</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span>
<a name="line-121"></a> <span class='hs-keyword'>do</span> <span class='hs-varid'>windows</span> <span class='hs-varop'>$</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>modify'</span>
<a name="line-122"></a> <span class='hs-varop'>$</span> <span class='hs-varid'>skipBoring</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>focusDown'</span> <span class='hs-comment'>-- wiggle focus to make sure</span>
<a name="line-123"></a> <span class='hs-varop'>.</span> <span class='hs-varid'>skipBoring</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>focusUp'</span> <span class='hs-comment'>-- no boring window gets the focus</span>
<a name="line-124"></a> <span class='hs-varop'>.</span> <span class='hs-varid'>focusMaster'</span>
<a name="line-125"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-126"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>skipBoring</span> <span class='hs-varid'>f</span> <span class='hs-varid'>st</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromMaybe</span> <span class='hs-varid'>st</span> <span class='hs-varop'>$</span> <span class='hs-varid'>listToMaybe</span>
<a name="line-127"></a> <span class='hs-varop'>$</span> <span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>`notElem`</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>focus</span> <span class='hs-varid'>st</span><span class='hs-conop'>:</span><span class='hs-varid'>bs</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>focus</span><span class='hs-layout'>)</span>
<a name="line-128"></a> <span class='hs-varop'>$</span> <span class='hs-varid'>take</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span> <span class='hs-varop'>$</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>integrate</span> <span class='hs-varid'>st</span><span class='hs-layout'>)</span>
<a name="line-129"></a> <span class='hs-varop'>$</span> <span class='hs-varid'>iterate</span> <span class='hs-varid'>f</span> <span class='hs-varid'>st</span>
<a name="line-130"></a> <span class='hs-varid'>bs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concat</span> <span class='hs-varop'>$</span> <span class='hs-varid'>cbs</span><span class='hs-conop'>:</span><span class='hs-varid'>maybeToList</span> <span class='hs-varid'>lbs</span> <span class='hs-varop'>++</span> <span class='hs-conid'>M</span><span class='hs-varop'>.</span><span class='hs-varid'>elems</span> <span class='hs-varid'>nbs</span>
<a name="line-131"></a> <span class='hs-varid'>rjl</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Left</span>
<a name="line-132"></a> <span class='hs-varid'>handleMessOrMaybeModifyIt</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-133"></a>
<a name="line-134"></a><a name="focusMaster'"></a><span class='hs-comment'>-- | Variant of 'focusMaster' that works on a</span>
<a name="line-135"></a><span class='hs-comment'>-- 'Stack' rather than an entire 'StackSet'.</span>
<a name="line-136"></a><span class='hs-definition'>focusMaster'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Stack</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Stack</span> <span class='hs-varid'>a</span>
<a name="line-137"></a><span class='hs-definition'>focusMaster'</span> <span class='hs-varid'>c</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'>Stack</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>c</span>
<a name="line-138"></a><span class='hs-definition'>focusMaster'</span> <span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Stack</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ls</span> <span class='hs-varid'>rs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Stack</span> <span class='hs-varid'>x</span> <span class='hs-conid'>[]</span> <span class='hs-layout'>(</span><span class='hs-varid'>xs</span> <span class='hs-varop'>++</span> <span class='hs-varid'>t</span> <span class='hs-conop'>:</span> <span class='hs-varid'>rs</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>reverse</span> <span class='hs-varid'>ls</span>
</pre></body>
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