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<pre><a name="line-1"></a><span class='hs-comment'>{-# OPTIONS_GHC -fno-warn-name-shadowing -fno-warn-unused-binds #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# LANGUAGE StandaloneDeriving, FlexibleContexts, DeriveDataTypeable
<a name="line-3"></a> , UndecidableInstances, FlexibleInstances, MultiParamTypeClasses
<a name="line-4"></a> , PatternGuards, Rank2Types, TypeSynonymInstances #-}</span>
<a name="line-5"></a>
<a name="line-6"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-7"></a><span class='hs-comment'>-- |</span>
<a name="line-8"></a><span class='hs-comment'>-- Module : XMonad.Layout.Groups</span>
<a name="line-9"></a><span class='hs-comment'>-- Copyright : Quentin Moser <moserq@gmail.com></span>
<a name="line-10"></a><span class='hs-comment'>-- License : BSD-style (see LICENSE)</span>
<a name="line-11"></a><span class='hs-comment'>--</span>
<a name="line-12"></a><span class='hs-comment'>-- Maintainer : orphaned</span>
<a name="line-13"></a><span class='hs-comment'>-- Stability : unstable</span>
<a name="line-14"></a><span class='hs-comment'>-- Portability : unportable</span>
<a name="line-15"></a><span class='hs-comment'>--</span>
<a name="line-16"></a><span class='hs-comment'>-- Two-level layout with windows split in individual layout groups,</span>
<a name="line-17"></a><span class='hs-comment'>-- themselves managed by a user-provided layout.</span>
<a name="line-18"></a><span class='hs-comment'>--</span>
<a name="line-19"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-20"></a>
<a name="line-21"></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'>Groups</span> <span class='hs-layout'>(</span> <span class='hs-comment'>-- * Usage</span>
<a name="line-22"></a> <span class='hs-comment'>-- $usage</span>
<a name="line-23"></a> <span class='hs-comment'>-- * Creation</span>
<a name="line-24"></a> <span class='hs-varid'>group</span>
<a name="line-25"></a> <span class='hs-comment'>-- * Messages</span>
<a name="line-26"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>GroupsMessage</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-27"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>ModifySpec</span>
<a name="line-28"></a> <span class='hs-comment'>-- ** Useful 'ModifySpec's</span>
<a name="line-29"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>swapUp</span>
<a name="line-30"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>swapDown</span>
<a name="line-31"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>swapMaster</span>
<a name="line-32"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>focusUp</span>
<a name="line-33"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>focusDown</span>
<a name="line-34"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>focusMaster</span>
<a name="line-35"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>swapGroupUp</span>
<a name="line-36"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>swapGroupDown</span>
<a name="line-37"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>swapGroupMaster</span>
<a name="line-38"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>focusGroupUp</span>
<a name="line-39"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>focusGroupDown</span>
<a name="line-40"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>focusGroupMaster</span>
<a name="line-41"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>moveToGroupUp</span>
<a name="line-42"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>moveToGroupDown</span>
<a name="line-43"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>moveToNewGroupUp</span>
<a name="line-44"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>moveToNewGroupDown</span>
<a name="line-45"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>splitGroup</span>
<a name="line-46"></a> <span class='hs-comment'>-- * Types</span>
<a name="line-47"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Groups</span>
<a name="line-48"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Group</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-49"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>onZipper</span>
<a name="line-50"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>onLayout</span>
<a name="line-51"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>WithID</span>
<a name="line-52"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>sameID</span>
<a name="line-53"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-54"></a>
<a name="line-55"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span>
<a name="line-56"></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-57"></a>
<a name="line-58"></a><span class='hs-keyword'>import</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'>Stack</span>
<a name="line-59"></a>
<a name="line-60"></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-varid'>isJust</span><span class='hs-layout'>,</span> <span class='hs-varid'>isNothing</span><span class='hs-layout'>,</span> <span class='hs-varid'>fromMaybe</span><span class='hs-layout'>,</span> <span class='hs-varid'>catMaybes</span><span class='hs-layout'>,</span> <span class='hs-varid'>fromJust</span><span class='hs-layout'>)</span>
<a name="line-61"></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>
<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'>Arrow</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-63"></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-64"></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-65"></a>
<a name="line-66"></a><span class='hs-comment'>-- $usage</span>
<a name="line-67"></a><span class='hs-comment'>-- This module provides a layout combinator that allows you</span>
<a name="line-68"></a><span class='hs-comment'>-- to manage your windows in independent groups. You can provide</span>
<a name="line-69"></a><span class='hs-comment'>-- both the layout with which to arrange the windows inside each</span>
<a name="line-70"></a><span class='hs-comment'>-- group, and the layout with which the groups themselves will</span>
<a name="line-71"></a><span class='hs-comment'>-- be arranged on the screen.</span>
<a name="line-72"></a><span class='hs-comment'>--</span>
<a name="line-73"></a><span class='hs-comment'>-- The "XMonad.Layout.Groups.Examples" and "XMonad.Layout.Groups.Wmii"</span>
<a name="line-74"></a><span class='hs-comment'>-- modules contain examples of layouts that can be defined with this</span>
<a name="line-75"></a><span class='hs-comment'>-- combinator. They're also the recommended starting point</span>
<a name="line-76"></a><span class='hs-comment'>-- if you are a beginner and looking for something you can use easily.</span>
<a name="line-77"></a><span class='hs-comment'>--</span>
<a name="line-78"></a><span class='hs-comment'>-- One thing to note is that 'Groups'-based layout have their own</span>
<a name="line-79"></a><span class='hs-comment'>-- notion of the order of windows, which is completely separate</span>
<a name="line-80"></a><span class='hs-comment'>-- from XMonad's. For this reason, operations like 'XMonad.StackSet.SwapUp'</span>
<a name="line-81"></a><span class='hs-comment'>-- will have no visible effect, and those like 'XMonad.StackSet.focusUp'</span>
<a name="line-82"></a><span class='hs-comment'>-- will focus the windows in an unpredictable order. For a better way of</span>
<a name="line-83"></a><span class='hs-comment'>-- rearranging windows and moving focus in such a layout, see the</span>
<a name="line-84"></a><span class='hs-comment'>-- example 'ModifySpec's (to be passed to the 'Modify' message) provided</span>
<a name="line-85"></a><span class='hs-comment'>-- by this module.</span>
<a name="line-86"></a><span class='hs-comment'>--</span>
<a name="line-87"></a><span class='hs-comment'>-- If you use both 'Groups'-based and other layouts, The "XMonad.Layout.Groups.Helpers"</span>
<a name="line-88"></a><span class='hs-comment'>-- module provides actions that can work correctly with both, defined using</span>
<a name="line-89"></a><span class='hs-comment'>-- functions from "XMonad.Actions.MessageFeedback".</span>
<a name="line-90"></a>
<a name="line-91"></a><a name="group"></a><span class='hs-comment'>-- | Create a 'Groups' layout.</span>
<a name="line-92"></a><span class='hs-comment'>--</span>
<a name="line-93"></a><span class='hs-comment'>-- Note that the second parameter (the layout for arranging the</span>
<a name="line-94"></a><span class='hs-comment'>-- groups) is not used on 'Windows', but on 'Group's. For this</span>
<a name="line-95"></a><span class='hs-comment'>-- reason, you can only use layouts that don't specifically</span>
<a name="line-96"></a><span class='hs-comment'>-- need to manage 'Window's. This is obvious, when you think</span>
<a name="line-97"></a><span class='hs-comment'>-- about it.</span>
<a name="line-98"></a><span class='hs-definition'>group</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>l</span> <span class='hs-conid'>Window</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>l2</span> <span class='hs-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-conid'>Window</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Groups</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l2</span> <span class='hs-conid'>Window</span>
<a name="line-99"></a><span class='hs-definition'>group</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l2</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Groups</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>startingGroups</span> <span class='hs-layout'>(</span><span class='hs-conid'>U</span> <span class='hs-num'>1</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span>
<a name="line-100"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>startingGroups</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromJust</span> <span class='hs-varop'>$</span> <span class='hs-varid'>singletonZ</span> <span class='hs-varop'>$</span> <span class='hs-conid'>G</span> <span class='hs-layout'>(</span><span class='hs-conid'>ID</span> <span class='hs-layout'>(</span><span class='hs-conid'>U</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varid'>emptyZ</span>
<a name="line-101"></a>
<a name="line-102"></a>
<a name="line-103"></a><span class='hs-comment'>-- * Stuff with unique keys</span>
<a name="line-104"></a>
<a name="line-105"></a><a name="Uniq"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Uniq</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>U</span> <span class='hs-conid'>Integer</span> <span class='hs-conid'>Integer</span>
<a name="line-106"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</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>
<a name="line-107"></a>
<a name="line-108"></a><a name="gen"></a><span class='hs-comment'>-- | From a seed, generate an infinite list of keys and a new</span>
<a name="line-109"></a><span class='hs-comment'>-- seed. All keys generated with this method will be different</span>
<a name="line-110"></a><span class='hs-comment'>-- provided you don't use 'gen' again with a key from the list.</span>
<a name="line-111"></a><span class='hs-comment'>-- (if you need to do that, see 'split' instead)</span>
<a name="line-112"></a><span class='hs-definition'>gen</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Uniq</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Uniq</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Uniq</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-113"></a><span class='hs-definition'>gen</span> <span class='hs-layout'>(</span><span class='hs-conid'>U</span> <span class='hs-varid'>i1</span> <span class='hs-varid'>i2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>U</span> <span class='hs-layout'>(</span><span class='hs-varid'>i1</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>i2</span><span class='hs-layout'>,</span> <span class='hs-varid'>zipWith</span> <span class='hs-conid'>U</span> <span class='hs-layout'>(</span><span class='hs-varid'>repeat</span> <span class='hs-varid'>i1</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>i2</span><span class='hs-keyglyph'>..</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-114"></a>
<a name="line-115"></a><span class='hs-comment'>-- | Split an infinite list into two. I ended up not</span>
<a name="line-116"></a><span class='hs-comment'>-- needing this, but let's keep it just in case.</span>
<a name="line-117"></a><span class='hs-comment'>-- split :: [a] -> ([a], [a])</span>
<a name="line-118"></a><span class='hs-comment'>-- split as = snd $ foldr step (True, ([], [])) as</span>
<a name="line-119"></a><span class='hs-comment'>-- where step a (True, (as1, as2)) = (False, (a:as1, as2))</span>
<a name="line-120"></a><span class='hs-comment'>-- step a (False, (as1, as2)) = (True, (as1, a:as2))</span>
<a name="line-121"></a>
<a name="line-122"></a><a name="WithID"></a><span class='hs-comment'>-- | Add a unique identity to a layout so we can</span>
<a name="line-123"></a><a name="WithID"></a><span class='hs-comment'>-- follow it around.</span>
<a name="line-124"></a><a name="WithID"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>WithID</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ID</span> <span class='hs-layout'>{</span> <span class='hs-varid'>getID</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Uniq</span>
<a name="line-125"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>unID</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>}</span>
<a name="line-126"></a> <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>
<a name="line-127"></a>
<a name="line-128"></a><a name="sameID"></a><span class='hs-comment'>-- | Compare the ids of two 'WithID' values</span>
<a name="line-129"></a><span class='hs-definition'>sameID</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>WithID</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>WithID</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-130"></a><span class='hs-definition'>sameID</span> <span class='hs-layout'>(</span><span class='hs-conid'>ID</span> <span class='hs-varid'>id1</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>ID</span> <span class='hs-varid'>id2</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>id1</span> <span class='hs-varop'>==</span> <span class='hs-varid'>id2</span>
<a name="line-131"></a>
<a name="line-132"></a><a name="instance%20Eq%20(WithID%20l%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Eq</span> <span class='hs-layout'>(</span><span class='hs-conid'>WithID</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-133"></a> <span class='hs-conid'>ID</span> <span class='hs-varid'>id1</span> <span class='hs-keyword'>_</span> <span class='hs-varop'>==</span> <span class='hs-conid'>ID</span> <span class='hs-varid'>id2</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>id1</span> <span class='hs-varop'>==</span> <span class='hs-varid'>id2</span>
<a name="line-134"></a>
<a name="line-135"></a><a name="instance%20LayoutClass%20(WithID%20l)%20a"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>LayoutClass</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>LayoutClass</span> <span class='hs-layout'>(</span><span class='hs-conid'>WithID</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-keyword'>where</span>
<a name="line-136"></a> <span class='hs-varid'>runLayout</span> <span class='hs-varid'>ws</span><span class='hs-keyglyph'>@</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'>layout</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ID</span> <span class='hs-varid'>id</span> <span class='hs-varid'>l</span> <span class='hs-layout'>}</span> <span class='hs-varid'>r</span>
<a name="line-137"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-layout'>(</span><span class='hs-varid'>placements</span><span class='hs-layout'>,</span> <span class='hs-varid'>ml'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>flip</span> <span class='hs-varid'>runLayout</span> <span class='hs-varid'>r</span>
<a name="line-138"></a> <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'>layout</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>l</span><span class='hs-layout'>}</span>
<a name="line-139"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>placements</span><span class='hs-layout'>,</span> <span class='hs-conid'>ID</span> <span class='hs-varid'>id</span> <span class='hs-varop'><$></span> <span class='hs-varid'>ml'</span><span class='hs-layout'>)</span>
<a name="line-140"></a> <span class='hs-varid'>handleMessage</span> <span class='hs-layout'>(</span><span class='hs-conid'>ID</span> <span class='hs-varid'>id</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varid'>sm</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>ml'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>l</span> <span class='hs-varid'>sm</span>
<a name="line-141"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>ID</span> <span class='hs-varid'>id</span> <span class='hs-varop'><$></span> <span class='hs-varid'>ml'</span>
<a name="line-142"></a> <span class='hs-varid'>description</span> <span class='hs-layout'>(</span><span class='hs-conid'>ID</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>description</span> <span class='hs-varid'>l</span>
<a name="line-143"></a>
<a name="line-144"></a>
<a name="line-145"></a>
<a name="line-146"></a><span class='hs-comment'>-- * The 'Groups' layout</span>
<a name="line-147"></a>
<a name="line-148"></a>
<a name="line-149"></a><span class='hs-comment'>-- ** Datatypes</span>
<a name="line-150"></a>
<a name="line-151"></a><a name="Group"></a><span class='hs-comment'>-- | A group of windows and its layout algorithm.</span>
<a name="line-152"></a><a name="Group"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>G</span> <span class='hs-layout'>{</span> <span class='hs-varid'>gLayout</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>WithID</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span>
<a name="line-153"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>gZipper</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Zipper</span> <span class='hs-varid'>a</span> <span class='hs-layout'>}</span>
<a name="line-154"></a> <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'>Eq</span><span class='hs-layout'>)</span>
<a name="line-155"></a>
<a name="line-156"></a><a name="onLayout"></a><span class='hs-definition'>onLayout</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>WithID</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>WithID</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span>
<a name="line-157"></a><span class='hs-definition'>onLayout</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>g</span> <span class='hs-layout'>{</span> <span class='hs-varid'>gLayout</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varop'>$</span> <span class='hs-varid'>gLayout</span> <span class='hs-varid'>g</span> <span class='hs-layout'>}</span>
<a name="line-158"></a>
<a name="line-159"></a><a name="onZipper"></a><span class='hs-definition'>onZipper</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Zipper</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Zipper</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span>
<a name="line-160"></a><span class='hs-definition'>onZipper</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>g</span> <span class='hs-layout'>{</span> <span class='hs-varid'>gZipper</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varop'>$</span> <span class='hs-varid'>gZipper</span> <span class='hs-varid'>g</span> <span class='hs-layout'>}</span>
<a name="line-161"></a>
<a name="line-162"></a><a name="Groups"></a><span class='hs-comment'>-- | The type of our layouts.</span>
<a name="line-163"></a><a name="Groups"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Groups</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Groups</span> <span class='hs-layout'>{</span> <span class='hs-comment'>-- | The starting layout for new groups</span>
<a name="line-164"></a> <span class='hs-varid'>baseLayout</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span>
<a name="line-165"></a> <span class='hs-comment'>-- | The layout for placing each group on the screen</span>
<a name="line-166"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>partitioner</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>l2</span> <span class='hs-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-167"></a> <span class='hs-comment'>-- | The window groups</span>
<a name="line-168"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>groups</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-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-169"></a> <span class='hs-comment'>-- | A seed for generating unique ids</span>
<a name="line-170"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>seed</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Uniq</span>
<a name="line-171"></a> <span class='hs-layout'>}</span>
<a name="line-172"></a>
<a name="line-173"></a><span class='hs-keyword'>deriving</span> <span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span> <span class='hs-layout'>(</span><span class='hs-varid'>l2</span> <span class='hs-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Show</span> <span class='hs-layout'>(</span><span class='hs-conid'>Groups</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-174"></a><span class='hs-keyword'>deriving</span> <span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Read</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Read</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>Read</span> <span class='hs-layout'>(</span><span class='hs-varid'>l2</span> <span class='hs-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Read</span> <span class='hs-layout'>(</span><span class='hs-conid'>Groups</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-175"></a>
<a name="line-176"></a><a name="GroupsMessage"></a><span class='hs-comment'>-- | Messages accepted by 'Groups'-based layouts.</span>
<a name="line-177"></a><a name="GroupsMessage"></a><span class='hs-comment'>-- All other messages are forwarded to the layout of the currently</span>
<a name="line-178"></a><a name="GroupsMessage"></a><span class='hs-comment'>-- focused subgroup (as if they had been wrapped in 'ToFocused').</span>
<a name="line-179"></a><a name="GroupsMessage"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>GroupsMessage</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ToEnclosing</span> <span class='hs-conid'>SomeMessage</span> <span class='hs-comment'>-- ^ Send a message to the enclosing layout</span>
<a name="line-180"></a> <span class='hs-comment'>-- (the one that places the groups themselves)</span>
<a name="line-181"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ToGroup</span> <span class='hs-conid'>Int</span> <span class='hs-conid'>SomeMessage</span> <span class='hs-comment'>-- ^ Send a message to the layout for nth group</span>
<a name="line-182"></a> <span class='hs-comment'>-- (starting at 0)</span>
<a name="line-183"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ToFocused</span> <span class='hs-conid'>SomeMessage</span> <span class='hs-comment'>-- ^ Send a message to the layout for the focused</span>
<a name="line-184"></a> <span class='hs-comment'>-- group</span>
<a name="line-185"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ToAll</span> <span class='hs-conid'>SomeMessage</span> <span class='hs-comment'>-- ^ Send a message to all the sub-layouts</span>
<a name="line-186"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Refocus</span> <span class='hs-comment'>-- ^ Refocus the window which should be focused according</span>
<a name="line-187"></a> <span class='hs-comment'>-- to the layout.</span>
<a name="line-188"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Modify</span> <span class='hs-conid'>ModifySpec</span> <span class='hs-comment'>-- ^ Modify the ordering\/grouping\/focusing</span>
<a name="line-189"></a> <span class='hs-comment'>-- of windows according to a 'ModifySpec'</span>
<a name="line-190"></a> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Typeable</span>
<a name="line-191"></a>
<a name="line-192"></a><a name="instance%20Show%20GroupsMessage"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-conid'>GroupsMessage</span> <span class='hs-keyword'>where</span>
<a name="line-193"></a> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-conid'>ToEnclosing</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"ToEnclosing {...}"</span>
<a name="line-194"></a> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-conid'>ToGroup</span> <span class='hs-varid'>i</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"ToGroup "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-varid'>i</span><span class='hs-varop'>++</span><span class='hs-str'>" {...}"</span>
<a name="line-195"></a> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-conid'>ToFocused</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"ToFocused {...}"</span>
<a name="line-196"></a> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-conid'>ToAll</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"ToAll {...}"</span>
<a name="line-197"></a> <span class='hs-varid'>show</span> <span class='hs-conid'>Refocus</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"Refocus"</span>
<a name="line-198"></a> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-conid'>Modify</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"Modify {...}"</span>
<a name="line-199"></a>
<a name="line-200"></a><a name="instance%20Zipper%20a%20-%3e%20Groups%20l%20l2%20a%20-%3e%20Groups%20l%20l2%20a%20readapt%20z%20g%20=%20let%20mf%20=%20getFocusZ%20z%20(seed',%20id:_)%20=%20gen%20$%20seed%20g%20g'%20=%20g%20%7b%20seed%20=%20seed'%20%7d%20in%20flip%20modifyGroups%20g'%20$%20mapZ_%20(onZipper%20$%20removeDeleted%20z)%20%3e%3e%3e%20filterKeepLast%20(isJust%20.%20gZipper)%20%3e%3e%3e%20findNewWindows%20(W.integrate'%20z)%20%3e%3e%3e%20addWindows%20(ID%20id%20$%20baseLayout%20g)%20%3e%3e%3e%20focusGroup%20mf%20%3e%3e%3e%20onFocusedZ%20(onZipper%20$%20focusWindow%20mf)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Message</span> <span class='hs-conid'>GroupsMessage</span>
<a name="line-201"></a>
<a name="line-202"></a><a name="modifyGroups"></a><span class='hs-definition'>modifyGroups</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Zipper</span> <span class='hs-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Zipper</span> <span class='hs-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-203"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Groups</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Groups</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span>
<a name="line-204"></a><span class='hs-definition'>modifyGroups</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>seed'</span><span class='hs-layout'>,</span> <span class='hs-varid'>id</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>gen</span> <span class='hs-layout'>(</span><span class='hs-varid'>seed</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span>
<a name="line-205"></a> <span class='hs-varid'>defaultGroups</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromJust</span> <span class='hs-varop'>$</span> <span class='hs-varid'>singletonZ</span> <span class='hs-varop'>$</span> <span class='hs-conid'>G</span> <span class='hs-layout'>(</span><span class='hs-conid'>ID</span> <span class='hs-varid'>id</span> <span class='hs-varop'>$</span> <span class='hs-varid'>baseLayout</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>emptyZ</span>
<a name="line-206"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>g</span> <span class='hs-layout'>{</span> <span class='hs-varid'>groups</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromMaybe</span> <span class='hs-varid'>defaultGroups</span> <span class='hs-varop'>.</span> <span class='hs-varid'>f</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>groups</span> <span class='hs-varid'>g</span>
<a name="line-207"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>seed</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>seed'</span> <span class='hs-layout'>}</span>
<a name="line-208"></a>
<a name="line-209"></a>
<a name="line-210"></a><span class='hs-comment'>-- ** Readaptation</span>
<a name="line-211"></a>
<a name="line-212"></a><a name="readapt"></a><span class='hs-comment'>-- | Adapt our groups to a new stack.</span>
<a name="line-213"></a><span class='hs-comment'>-- This algorithm handles window additions and deletions correctly,</span>
<a name="line-214"></a><span class='hs-comment'>-- ignores changes in window ordering, and tries to react to any</span>
<a name="line-215"></a><span class='hs-comment'>-- other stack changes as gracefully as possible.</span>
<a name="line-216"></a><span class='hs-definition'>readapt</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Eq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Zipper</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Groups</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Groups</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span>
<a name="line-217"></a><span class='hs-definition'>readapt</span> <span class='hs-varid'>z</span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>mf</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>getFocusZ</span> <span class='hs-varid'>z</span>
<a name="line-218"></a> <span class='hs-layout'>(</span><span class='hs-varid'>seed'</span><span class='hs-layout'>,</span> <span class='hs-varid'>id</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>gen</span> <span class='hs-varop'>$</span> <span class='hs-varid'>seed</span> <span class='hs-varid'>g</span>
<a name="line-219"></a> <span class='hs-varid'>g'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>g</span> <span class='hs-layout'>{</span> <span class='hs-varid'>seed</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>seed'</span> <span class='hs-layout'>}</span>
<a name="line-220"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>flip</span> <span class='hs-varid'>modifyGroups</span> <span class='hs-varid'>g'</span> <span class='hs-varop'>$</span> <span class='hs-varid'>mapZ_</span> <span class='hs-layout'>(</span><span class='hs-varid'>onZipper</span> <span class='hs-varop'>$</span> <span class='hs-varid'>removeDeleted</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span>
<a name="line-221"></a> <span class='hs-varop'>>>></span> <span class='hs-varid'>filterKeepLast</span> <span class='hs-layout'>(</span><span class='hs-varid'>isJust</span> <span class='hs-varop'>.</span> <span class='hs-varid'>gZipper</span><span class='hs-layout'>)</span>
<a name="line-222"></a> <span class='hs-varop'>>>></span> <span class='hs-varid'>findNewWindows</span> <span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>integrate'</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span>
<a name="line-223"></a> <span class='hs-varop'>>>></span> <span class='hs-varid'>addWindows</span> <span class='hs-layout'>(</span><span class='hs-conid'>ID</span> <span class='hs-varid'>id</span> <span class='hs-varop'>$</span> <span class='hs-varid'>baseLayout</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span>
<a name="line-224"></a> <span class='hs-varop'>>>></span> <span class='hs-varid'>focusGroup</span> <span class='hs-varid'>mf</span>
<a name="line-225"></a> <span class='hs-varop'>>>></span> <span class='hs-varid'>onFocusedZ</span> <span class='hs-layout'>(</span><span class='hs-varid'>onZipper</span> <span class='hs-varop'>$</span> <span class='hs-varid'>focusWindow</span> <span class='hs-varid'>mf</span><span class='hs-layout'>)</span>
<a name="line-226"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>filterKeepLast</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-227"></a> <span class='hs-varid'>filterKeepLast</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>singletonZ</span> <span class='hs-varop'>$</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>focus</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-conid'>Just</span>
<a name="line-228"></a> <span class='hs-varop'>$</span> <span class='hs-varid'>filterZ_</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span>
<a name="line-229"></a>
<a name="line-230"></a><a name="removeDeleted"></a><span class='hs-comment'>-- | Remove the windows from a group which are no longer present in</span>
<a name="line-231"></a><span class='hs-comment'>-- the stack.</span>
<a name="line-232"></a><span class='hs-definition'>removeDeleted</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Eq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Zipper</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Zipper</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Zipper</span> <span class='hs-varid'>a</span>
<a name="line-233"></a><span class='hs-definition'>removeDeleted</span> <span class='hs-varid'>z</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>filterZ_</span> <span class='hs-layout'>(</span><span class='hs-varid'>flip</span> <span class='hs-varid'>elemZ</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span>
<a name="line-234"></a>
<a name="line-235"></a><a name="findNewWindows"></a><span class='hs-comment'>-- | Identify the windows not already in a group.</span>
<a name="line-236"></a><span class='hs-definition'>findNewWindows</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Eq</span> <span class='hs-varid'>a</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-keyglyph'>-></span> <span class='hs-conid'>Zipper</span> <span class='hs-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-237"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Zipper</span> <span class='hs-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-238"></a><span class='hs-definition'>findNewWindows</span> <span class='hs-keyword'>as</span> <span class='hs-varid'>gs</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>gs</span><span class='hs-layout'>,</span> <span class='hs-varid'>foldrZ_</span> <span class='hs-varid'>removePresent</span> <span class='hs-keyword'>as</span> <span class='hs-varid'>gs</span><span class='hs-layout'>)</span>
<a name="line-239"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>removePresent</span> <span class='hs-varid'>g</span> <span class='hs-varid'>as'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-varop'>.</span> <span class='hs-varid'>flip</span> <span class='hs-varid'>elemZ</span> <span class='hs-layout'>(</span><span class='hs-varid'>gZipper</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>as'</span>
<a name="line-240"></a>
<a name="line-241"></a><a name="addWindows"></a><span class='hs-comment'>-- | Add windows to the focused group. If you need to create one,</span>
<a name="line-242"></a><span class='hs-comment'>-- use the given layout and an id from the given list.</span>
<a name="line-243"></a><span class='hs-definition'>addWindows</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>WithID</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Zipper</span> <span class='hs-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Zipper</span> <span class='hs-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-244"></a><span class='hs-definition'>addWindows</span> <span class='hs-varid'>l</span> <span class='hs-layout'>(</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>,</span> <span class='hs-keyword'>as</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>singletonZ</span> <span class='hs-varop'>$</span> <span class='hs-conid'>G</span> <span class='hs-varid'>l</span> <span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>differentiate</span> <span class='hs-keyword'>as</span><span class='hs-layout'>)</span>
<a name="line-245"></a><span class='hs-definition'>addWindows</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-varid'>z</span><span class='hs-layout'>,</span> <span class='hs-keyword'>as</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>onFocusedZ</span> <span class='hs-layout'>(</span><span class='hs-varid'>onZipper</span> <span class='hs-varid'>add</span><span class='hs-layout'>)</span> <span class='hs-varid'>z</span>
<a name="line-246"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>add</span> <span class='hs-varid'>z</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldl</span> <span class='hs-layout'>(</span><span class='hs-varid'>flip</span> <span class='hs-varid'>insertUpZ</span><span class='hs-layout'>)</span> <span class='hs-varid'>z</span> <span class='hs-keyword'>as</span>
<a name="line-247"></a>
<a name="line-248"></a><a name="focusGroup"></a><span class='hs-comment'>-- | Focus the group containing the given window</span>
<a name="line-249"></a><span class='hs-definition'>focusGroup</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Eq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Maybe</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Zipper</span> <span class='hs-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Zipper</span> <span class='hs-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-250"></a><span class='hs-definition'>focusGroup</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>id</span>
<a name="line-251"></a><span class='hs-definition'>focusGroup</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromTags</span> <span class='hs-varop'>.</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>tagBy</span> <span class='hs-varop'>$</span> <span class='hs-varid'>elemZ</span> <span class='hs-varid'>a</span> <span class='hs-varop'>.</span> <span class='hs-varid'>gZipper</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'>integrate'</span>
<a name="line-252"></a>
<a name="line-253"></a><a name="focusWindow"></a><span class='hs-comment'>-- | Focus the given window</span>
<a name="line-254"></a><span class='hs-definition'>focusWindow</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Eq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Maybe</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Zipper</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Zipper</span> <span class='hs-varid'>a</span>
<a name="line-255"></a><span class='hs-definition'>focusWindow</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>id</span>
<a name="line-256"></a><span class='hs-definition'>focusWindow</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromTags</span> <span class='hs-varop'>.</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>tagBy</span> <span class='hs-layout'>(</span><span class='hs-varop'>==</span><span class='hs-varid'>a</span><span class='hs-layout'>)</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'>integrate'</span>
<a name="line-257"></a>
<a name="line-258"></a>
<a name="line-259"></a><span class='hs-comment'>-- * Interface</span>
<a name="line-260"></a>
<a name="line-261"></a><span class='hs-comment'>-- ** Layout instance</span>
<a name="line-262"></a>
<a name="line-263"></a><a name="instance%20LayoutClass%20(Groups%20l%20l2)%20Window"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>LayoutClass</span> <span class='hs-varid'>l</span> <span class='hs-conid'>Window</span><span class='hs-layout'>,</span> <span class='hs-conid'>LayoutClass</span> <span class='hs-varid'>l2</span> <span class='hs-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-conid'>Window</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-264"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>LayoutClass</span> <span class='hs-layout'>(</span><span class='hs-conid'>Groups</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l2</span><span class='hs-layout'>)</span> <span class='hs-conid'>Window</span> <span class='hs-keyword'>where</span>
<a name="line-265"></a>
<a name="line-266"></a> <span class='hs-varid'>description</span> <span class='hs-layout'>(</span><span class='hs-conid'>Groups</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>p</span> <span class='hs-varid'>gs</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>s1</span><span class='hs-varop'>++</span><span class='hs-str'>" by "</span><span class='hs-varop'>++</span><span class='hs-varid'>s2</span>
<a name="line-267"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>s1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>description</span> <span class='hs-varop'>$</span> <span class='hs-varid'>gLayout</span> <span class='hs-varop'>$</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>focus</span> <span class='hs-varid'>gs</span>
<a name="line-268"></a> <span class='hs-varid'>s2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>description</span> <span class='hs-varid'>p</span>
<a name="line-269"></a>
<a name="line-270"></a> <span class='hs-varid'>runLayout</span> <span class='hs-varid'>ws</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Workspace</span> <span class='hs-keyword'>_</span> <span class='hs-sel'>_l</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>readapt</span> <span class='hs-varid'>z</span> <span class='hs-sel'>_l</span> <span class='hs-keyword'>in</span>
<a name="line-271"></a> <span class='hs-keyword'>do</span> <span class='hs-layout'>(</span><span class='hs-varid'>areas</span><span class='hs-layout'>,</span> <span class='hs-varid'>mpart'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>runLayout</span> <span class='hs-varid'>ws</span> <span class='hs-layout'>{</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>layout</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>partitioner</span> <span class='hs-varid'>l</span>
<a name="line-272"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>stack</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>groups</span> <span class='hs-varid'>l</span> <span class='hs-layout'>}</span> <span class='hs-varid'>r</span>
<a name="line-273"></a>
<a name="line-274"></a> <span class='hs-varid'>results</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>forM</span> <span class='hs-varid'>areas</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>g</span><span class='hs-layout'>,</span> <span class='hs-varid'>r'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>runLayout</span> <span class='hs-varid'>ws</span> <span class='hs-layout'>{</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>layout</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>gLayout</span> <span class='hs-varid'>g</span>
<a name="line-275"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>stack</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>gZipper</span> <span class='hs-varid'>g</span> <span class='hs-layout'>}</span> <span class='hs-varid'>r'</span>
<a name="line-276"></a>
<a name="line-277"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>hidden</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-varid'>gLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>integrate</span> <span class='hs-varop'>$</span> <span class='hs-varid'>groups</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varop'>\\</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>gLayout</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fst</span><span class='hs-layout'>)</span> <span class='hs-varid'>areas</span>
<a name="line-278"></a> <span class='hs-varid'>hidden'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mapM</span> <span class='hs-layout'>(</span><span class='hs-varid'>flip</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varop'>$</span> <span class='hs-conid'>SomeMessage</span> <span class='hs-conid'>Hide</span><span class='hs-layout'>)</span> <span class='hs-varid'>hidden</span>
<a name="line-279"></a>
<a name="line-280"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>placements</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concatMap</span> <span class='hs-varid'>fst</span> <span class='hs-varid'>results</span>
<a name="line-281"></a> <span class='hs-varid'>newL</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>justMakeNew</span> <span class='hs-varid'>l</span> <span class='hs-varid'>mpart'</span> <span class='hs-layout'>(</span><span class='hs-varid'>map</span> <span class='hs-varid'>snd</span> <span class='hs-varid'>results</span> <span class='hs-varop'>++</span> <span class='hs-varid'>hidden'</span><span class='hs-layout'>)</span>
<a name="line-282"></a>
<a name="line-283"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-layout'>(</span><span class='hs-varid'>placements</span><span class='hs-layout'>,</span> <span class='hs-varid'>newL</span><span class='hs-layout'>)</span>
<a name="line-284"></a>
<a name="line-285"></a> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>l</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Groups</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>p</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-varid'>sm</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>ToEnclosing</span> <span class='hs-varid'>sm'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>sm</span>
<a name="line-286"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>mp'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>p</span> <span class='hs-varid'>sm'</span>
<a name="line-287"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>maybeMakeNew</span> <span class='hs-varid'>l</span> <span class='hs-varid'>mp'</span> <span class='hs-conid'>[]</span>
<a name="line-288"></a>
<a name="line-289"></a> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>l</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Groups</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>p</span> <span class='hs-varid'>gs</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-varid'>sm</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>ToAll</span> <span class='hs-varid'>sm'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>sm</span>
<a name="line-290"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>mp'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>p</span> <span class='hs-varid'>sm'</span>
<a name="line-291"></a> <span class='hs-varid'>mg's</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mapZM_</span> <span class='hs-layout'>(</span><span class='hs-varid'>handle</span> <span class='hs-varid'>sm'</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>gs</span>
<a name="line-292"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>maybeMakeNew</span> <span class='hs-varid'>l</span> <span class='hs-varid'>mp'</span> <span class='hs-varop'>$</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>integrate'</span> <span class='hs-varid'>mg's</span>
<a name="line-293"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>handle</span> <span class='hs-varid'>sm</span> <span class='hs-layout'>(</span><span class='hs-conid'>G</span> <span class='hs-varid'>l</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>l</span> <span class='hs-varid'>sm</span>
<a name="line-294"></a>
<a name="line-295"></a> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>l</span> <span class='hs-varid'>sm</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>sm</span>
<a name="line-296"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-sel'>_rightType</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span> <span class='hs-varop'>==</span> <span class='hs-conid'>Hide</span> <span class='hs-comment'>-- Is there a better-looking way</span>
<a name="line-297"></a> <span class='hs-comment'>-- of doing this?</span>
<a name="line-298"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>l</span> <span class='hs-varop'>$</span> <span class='hs-conid'>SomeMessage</span> <span class='hs-varop'>$</span> <span class='hs-conid'>ToAll</span> <span class='hs-varid'>sm</span>
<a name="line-299"></a>
<a name="line-300"></a> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>l</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Groups</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>z</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-varid'>sm</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>sm</span> <span class='hs-keyword'>of</span>
<a name="line-301"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>ToFocused</span> <span class='hs-varid'>sm'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <span class='hs-varid'>mg's</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-varop'><$></span> <span class='hs-varid'>handleOnFocused</span> <span class='hs-varid'>sm'</span> <span class='hs-varid'>z</span>
<a name="line-302"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>maybeMakeNew</span> <span class='hs-varid'>l</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>mg's</span>
<a name="line-303"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>ToGroup</span> <span class='hs-varid'>i</span> <span class='hs-varid'>sm'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <span class='hs-varid'>mg's</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>handleOnIndex</span> <span class='hs-varid'>i</span> <span class='hs-varid'>sm'</span> <span class='hs-varid'>z</span>
<a name="line-304"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>maybeMakeNew</span> <span class='hs-varid'>l</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>mg's</span>
<a name="line-305"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Modify</span> <span class='hs-varid'>spec</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>applySpec</span> <span class='hs-varid'>spec</span> <span class='hs-varid'>l</span> <span class='hs-keyword'>of</span>
<a name="line-306"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>l'</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>refocus</span> <span class='hs-varid'>l'</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>l'</span><span class='hs-layout'>)</span>
<a name="line-307"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>l</span>
<a name="line-308"></a> <span class='hs-conid'>Just</span> <span class='hs-conid'>Refocus</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>refocus</span> <span class='hs-varid'>l</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span>
<a name="line-309"></a> <span class='hs-conid'>Just</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-310"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>l</span> <span class='hs-varop'>$</span> <span class='hs-conid'>SomeMessage</span> <span class='hs-layout'>(</span><span class='hs-conid'>ToFocused</span> <span class='hs-varid'>sm</span><span class='hs-layout'>)</span>
<a name="line-311"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>handleOnFocused</span> <span class='hs-varid'>sm</span> <span class='hs-varid'>z</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapZM</span> <span class='hs-varid'>step</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>z</span>
<a name="line-312"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>step</span> <span class='hs-conid'>True</span> <span class='hs-layout'>(</span><span class='hs-conid'>G</span> <span class='hs-varid'>l</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>l</span> <span class='hs-varid'>sm</span>
<a name="line-313"></a> <span class='hs-varid'>step</span> <span class='hs-conid'>False</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-314"></a> <span class='hs-varid'>handleOnIndex</span> <span class='hs-varid'>i</span> <span class='hs-varid'>sm</span> <span class='hs-varid'>z</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapM</span> <span class='hs-varid'>step</span> <span class='hs-varop'>$</span> <span class='hs-varid'>zip</span> <span class='hs-keyglyph'>[</span><span class='hs-num'>0</span><span class='hs-keyglyph'>..</span><span class='hs-keyglyph'>]</span> <span class='hs-varop'>$</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>integrate</span> <span class='hs-varid'>z</span>
<a name="line-315"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>step</span> <span class='hs-layout'>(</span><span class='hs-varid'>j</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conid'>G</span> <span class='hs-varid'>l</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>i</span> <span class='hs-varop'>==</span> <span class='hs-varid'>j</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>l</span> <span class='hs-varid'>sm</span>
<a name="line-316"></a> <span class='hs-varid'>step</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-317"></a>
<a name="line-318"></a>
<a name="line-319"></a><a name="justMakeNew"></a><span class='hs-definition'>justMakeNew</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Groups</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>l2</span> <span class='hs-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>WithID</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-320"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Groups</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-321"></a><span class='hs-definition'>justMakeNew</span> <span class='hs-varid'>g</span> <span class='hs-varid'>mpart'</span> <span class='hs-varid'>ml's</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>g</span> <span class='hs-layout'>{</span> <span class='hs-varid'>partitioner</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromMaybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>partitioner</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>mpart'</span>
<a name="line-322"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>groups</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>combine</span> <span class='hs-layout'>(</span><span class='hs-varid'>groups</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>ml's</span> <span class='hs-layout'>}</span>
<a name="line-323"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>combine</span> <span class='hs-varid'>z</span> <span class='hs-varid'>ml's</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>table</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>ID</span> <span class='hs-varid'>id</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>id</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>catMaybes</span> <span class='hs-varid'>ml's</span>
<a name="line-324"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>flip</span> <span class='hs-varid'>mapS_</span> <span class='hs-varid'>z</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>G</span> <span class='hs-layout'>(</span><span class='hs-conid'>ID</span> <span class='hs-varid'>id</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varid'>ws</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>lookup</span> <span class='hs-varid'>id</span> <span class='hs-varid'>table</span> <span class='hs-keyword'>of</span>
<a name="line-325"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>G</span> <span class='hs-layout'>(</span><span class='hs-conid'>ID</span> <span class='hs-varid'>id</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varid'>ws</span>
<a name="line-326"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>l'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>G</span> <span class='hs-layout'>(</span><span class='hs-conid'>ID</span> <span class='hs-varid'>id</span> <span class='hs-varid'>l'</span><span class='hs-layout'>)</span> <span class='hs-varid'>ws</span>
<a name="line-327"></a> <span class='hs-varid'>mapS_</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromJust</span> <span class='hs-varop'>.</span> <span class='hs-varid'>mapZ_</span> <span class='hs-varid'>f</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Just</span>
<a name="line-328"></a>
<a name="line-329"></a>
<a name="line-330"></a><a name="maybeMakeNew"></a><span class='hs-definition'>maybeMakeNew</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Groups</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>l2</span> <span class='hs-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>WithID</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-331"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Groups</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-332"></a><span class='hs-definition'>maybeMakeNew</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>ml's</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>all</span> <span class='hs-varid'>isNothing</span> <span class='hs-varid'>ml's</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-333"></a><span class='hs-definition'>maybeMakeNew</span> <span class='hs-varid'>g</span> <span class='hs-varid'>mpart'</span> <span class='hs-varid'>ml's</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>justMakeNew</span> <span class='hs-varid'>g</span> <span class='hs-varid'>mpart'</span> <span class='hs-varid'>ml's</span>
<a name="line-334"></a>
<a name="line-335"></a><a name="refocus"></a><span class='hs-definition'>refocus</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Groups</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l2</span> <span class='hs-conid'>Window</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-conid'>()</span>
<a name="line-336"></a><span class='hs-definition'>refocus</span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>getFocusZ</span> <span class='hs-varop'>$</span> <span class='hs-varid'>gZipper</span> <span class='hs-varop'>$</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>focus</span> <span class='hs-varop'>$</span> <span class='hs-varid'>groups</span> <span class='hs-varid'>g</span>
<a name="line-337"></a> <span class='hs-keyword'>of</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>focus</span> <span class='hs-varid'>w</span>
<a name="line-338"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-339"></a>
<a name="line-340"></a><span class='hs-comment'>-- ** ModifySpec type</span>
<a name="line-341"></a>
<a name="line-342"></a><a name="ModifySpec"></a><span class='hs-comment'>-- | Type of functions describing modifications to a 'Groups' layout. They</span>
<a name="line-343"></a><a name="ModifySpec"></a><span class='hs-comment'>-- are transformations on 'Zipper's of groups.</span>
<a name="line-344"></a><a name="ModifySpec"></a><span class='hs-comment'>--</span>
<a name="line-345"></a><a name="ModifySpec"></a><span class='hs-comment'>-- Things you shouldn't do:</span>
<a name="line-346"></a><a name="ModifySpec"></a><span class='hs-comment'>--</span>
<a name="line-347"></a><a name="ModifySpec"></a><span class='hs-comment'>-- * Forge new windows (they will be ignored)</span>
<a name="line-348"></a><a name="ModifySpec"></a><span class='hs-comment'>--</span>
<a name="line-349"></a><a name="ModifySpec"></a><span class='hs-comment'>-- * Duplicate windows (whatever happens is your problem)</span>
<a name="line-350"></a><a name="ModifySpec"></a><span class='hs-comment'>--</span>
<a name="line-351"></a><a name="ModifySpec"></a><span class='hs-comment'>-- * Remove windows (they will be added again)</span>
<a name="line-352"></a><a name="ModifySpec"></a><span class='hs-comment'>--</span>
<a name="line-353"></a><a name="ModifySpec"></a><span class='hs-comment'>-- * Duplicate layouts (only one will be kept, the rest will</span>
<a name="line-354"></a><a name="ModifySpec"></a><span class='hs-comment'>-- get the base layout)</span>
<a name="line-355"></a><a name="ModifySpec"></a><span class='hs-comment'>--</span>
<a name="line-356"></a><a name="ModifySpec"></a><span class='hs-comment'>-- Note that 'ModifySpec' is a rank-2 type (indicating that 'ModifySpec's must</span>
<a name="line-357"></a><a name="ModifySpec"></a><span class='hs-comment'>-- be polymorphic in the layout type), so if you define functions taking</span>
<a name="line-358"></a><a name="ModifySpec"></a><span class='hs-comment'>-- 'ModifySpec's as arguments, or returning them, you'll need to write a type</span>
<a name="line-359"></a><a name="ModifySpec"></a><span class='hs-comment'>-- signature and add @{-# LANGUAGE Rank2Types #-}@ at the beginning</span>
<a name="line-360"></a><a name="ModifySpec"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>ModifySpec</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>l</span><span class='hs-varop'>.</span> <span class='hs-conid'>WithID</span> <span class='hs-varid'>l</span> <span class='hs-conid'>Window</span>
<a name="line-361"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Zipper</span> <span class='hs-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-conid'>Window</span><span class='hs-layout'>)</span>
<a name="line-362"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Zipper</span> <span class='hs-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-conid'>Window</span><span class='hs-layout'>)</span>
<a name="line-363"></a>
<a name="line-364"></a><a name="applySpec"></a><span class='hs-comment'>-- | Apply a ModifySpec.</span>
<a name="line-365"></a><span class='hs-definition'>applySpec</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModifySpec</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Groups</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l2</span> <span class='hs-conid'>Window</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Groups</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l2</span> <span class='hs-conid'>Window</span><span class='hs-layout'>)</span>
<a name="line-366"></a><span class='hs-definition'>applySpec</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>seed'</span><span class='hs-layout'>,</span> <span class='hs-varid'>id</span><span class='hs-conop'>:</span><span class='hs-varid'>ids</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>gen</span> <span class='hs-varop'>$</span> <span class='hs-varid'>seed</span> <span class='hs-varid'>g</span>
<a name="line-367"></a> <span class='hs-varid'>g'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>flip</span> <span class='hs-varid'>modifyGroups</span> <span class='hs-varid'>g</span> <span class='hs-varop'>$</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>ID</span> <span class='hs-varid'>id</span> <span class='hs-varop'>$</span> <span class='hs-varid'>baseLayout</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span>
<a name="line-368"></a> <span class='hs-varop'>>>></span> <span class='hs-varid'>toTags</span>
<a name="line-369"></a> <span class='hs-varop'>>>></span> <span class='hs-varid'>foldr</span> <span class='hs-varid'>reID</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>ids</span><span class='hs-layout'>,</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span>
<a name="line-370"></a> <span class='hs-varop'>>>></span> <span class='hs-varid'>snd</span>
<a name="line-371"></a> <span class='hs-varop'>>>></span> <span class='hs-varid'>fromTags</span>
<a name="line-372"></a> <span class='hs-keyword'>in</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>groups</span> <span class='hs-varid'>g</span> <span class='hs-varop'>==</span> <span class='hs-varid'>groups</span> <span class='hs-varid'>g'</span> <span class='hs-keyword'>of</span>
<a name="line-373"></a> <span class='hs-conid'>True</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Nothing</span>
<a name="line-374"></a> <span class='hs-conid'>False</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-varid'>g'</span> <span class='hs-layout'>{</span> <span class='hs-varid'>seed</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>seed'</span> <span class='hs-layout'>}</span>
<a name="line-375"></a>
<a name="line-376"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>reID</span> <span class='hs-varid'>eg</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>id</span><span class='hs-conop'>:</span><span class='hs-varid'>ids</span><span class='hs-layout'>,</span> <span class='hs-varid'>seen</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>egs</span><span class='hs-layout'>)</span>
<a name="line-377"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>myID</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>getID</span> <span class='hs-varop'>$</span> <span class='hs-varid'>gLayout</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fromE</span> <span class='hs-varid'>eg</span>
<a name="line-378"></a> <span class='hs-keyword'>in</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>elem</span> <span class='hs-varid'>myID</span> <span class='hs-varid'>seen</span> <span class='hs-keyword'>of</span>
<a name="line-379"></a> <span class='hs-conid'>False</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>id</span><span class='hs-conop'>:</span><span class='hs-varid'>ids</span><span class='hs-layout'>,</span> <span class='hs-varid'>myID</span><span class='hs-conop'>:</span><span class='hs-varid'>seen</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>eg</span><span class='hs-conop'>:</span><span class='hs-varid'>egs</span><span class='hs-layout'>)</span>
<a name="line-380"></a> <span class='hs-conid'>True</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>ids</span><span class='hs-layout'>,</span> <span class='hs-varid'>seen</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>mapE_</span> <span class='hs-layout'>(</span><span class='hs-varid'>setID</span> <span class='hs-varid'>id</span><span class='hs-layout'>)</span> <span class='hs-varid'>eg</span><span class='hs-conop'>:</span><span class='hs-varid'>egs</span><span class='hs-layout'>)</span>
<a name="line-381"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>setID</span> <span class='hs-varid'>id</span> <span class='hs-layout'>(</span><span class='hs-conid'>G</span> <span class='hs-layout'>(</span><span class='hs-conid'>ID</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>G</span> <span class='hs-layout'>(</span><span class='hs-conid'>ID</span> <span class='hs-varid'>id</span> <span class='hs-varop'>$</span> <span class='hs-varid'>baseLayout</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>z</span>
<a name="line-382"></a> <span class='hs-varid'>reID</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>[]</span><span class='hs-layout'>,</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>undefined</span> <span class='hs-comment'>-- The list of ids is infinite</span>
<a name="line-383"></a>
<a name="line-384"></a>
<a name="line-385"></a>
<a name="line-386"></a>
<a name="line-387"></a>
<a name="line-388"></a><span class='hs-comment'>-- ** Misc. ModifySpecs</span>
<a name="line-389"></a>
<a name="line-390"></a><a name="onFocused"></a><span class='hs-comment'>-- | helper</span>
<a name="line-391"></a><span class='hs-definition'>onFocused</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Zipper</span> <span class='hs-conid'>Window</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Zipper</span> <span class='hs-conid'>Window</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ModifySpec</span>
<a name="line-392"></a><span class='hs-definition'>onFocused</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>gs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>onFocusedZ</span> <span class='hs-layout'>(</span><span class='hs-varid'>onZipper</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>gs</span>
<a name="line-393"></a>
<a name="line-394"></a><a name="swapUp"></a><span class='hs-comment'>-- | Swap the focused window with the previous one.</span>
<a name="line-395"></a><span class='hs-definition'>swapUp</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModifySpec</span>
<a name="line-396"></a><span class='hs-definition'>swapUp</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>onFocused</span> <span class='hs-varid'>swapUpZ</span>
<a name="line-397"></a>
<a name="line-398"></a><a name="swapDown"></a><span class='hs-comment'>-- | Swap the focused window with the next one.</span>
<a name="line-399"></a><span class='hs-definition'>swapDown</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModifySpec</span>
<a name="line-400"></a><span class='hs-definition'>swapDown</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>onFocused</span> <span class='hs-varid'>swapDownZ</span>
<a name="line-401"></a>
<a name="line-402"></a><a name="swapMaster"></a><span class='hs-comment'>-- | Swap the focused window with the (group's) master</span>
<a name="line-403"></a><span class='hs-comment'>-- window.</span>
<a name="line-404"></a><span class='hs-definition'>swapMaster</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModifySpec</span>
<a name="line-405"></a><span class='hs-definition'>swapMaster</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>onFocused</span> <span class='hs-varid'>swapMasterZ</span>
<a name="line-406"></a>
<a name="line-407"></a><a name="swapGroupUp"></a><span class='hs-comment'>-- | Swap the focused group with the previous one.</span>
<a name="line-408"></a><span class='hs-definition'>swapGroupUp</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModifySpec</span>
<a name="line-409"></a><span class='hs-definition'>swapGroupUp</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>swapUpZ</span>
<a name="line-410"></a>
<a name="line-411"></a><a name="swapGroupDown"></a><span class='hs-comment'>-- | Swap the focused group with the next one.</span>
<a name="line-412"></a><span class='hs-definition'>swapGroupDown</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModifySpec</span>
<a name="line-413"></a><span class='hs-definition'>swapGroupDown</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>swapDownZ</span>
<a name="line-414"></a>
<a name="line-415"></a><a name="swapGroupMaster"></a><span class='hs-comment'>-- | Swap the focused group with the master group.</span>
<a name="line-416"></a><span class='hs-definition'>swapGroupMaster</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModifySpec</span>
<a name="line-417"></a><span class='hs-definition'>swapGroupMaster</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>swapMasterZ</span>
<a name="line-418"></a>
<a name="line-419"></a><a name="focusUp"></a><span class='hs-comment'>-- | Move focus to the previous window in the group.</span>
<a name="line-420"></a><span class='hs-definition'>focusUp</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModifySpec</span>
<a name="line-421"></a><span class='hs-definition'>focusUp</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>onFocused</span> <span class='hs-varid'>focusUpZ</span>
<a name="line-422"></a>
<a name="line-423"></a><a name="focusDown"></a><span class='hs-comment'>-- | Move focus to the next window in the group.</span>
<a name="line-424"></a><span class='hs-definition'>focusDown</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModifySpec</span>
<a name="line-425"></a><span class='hs-definition'>focusDown</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>onFocused</span> <span class='hs-varid'>focusDownZ</span>
<a name="line-426"></a>
<a name="line-427"></a><a name="focusMaster"></a><span class='hs-comment'>-- | Move focus to the group's master window.</span>
<a name="line-428"></a><span class='hs-definition'>focusMaster</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModifySpec</span>
<a name="line-429"></a><span class='hs-definition'>focusMaster</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>onFocused</span> <span class='hs-varid'>focusMasterZ</span>
<a name="line-430"></a>
<a name="line-431"></a><a name="focusGroupUp"></a><span class='hs-comment'>-- | Move focus to the previous group.</span>
<a name="line-432"></a><span class='hs-definition'>focusGroupUp</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModifySpec</span>
<a name="line-433"></a><span class='hs-definition'>focusGroupUp</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>focusUpZ</span>
<a name="line-434"></a>
<a name="line-435"></a><a name="focusGroupDown"></a><span class='hs-comment'>-- | Move focus to the next group.</span>
<a name="line-436"></a><span class='hs-definition'>focusGroupDown</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModifySpec</span>
<a name="line-437"></a><span class='hs-definition'>focusGroupDown</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>focusDownZ</span>
<a name="line-438"></a>
<a name="line-439"></a><a name="focusGroupMaster"></a><span class='hs-comment'>-- | Move focus to the master group.</span>
<a name="line-440"></a><span class='hs-definition'>focusGroupMaster</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModifySpec</span>
<a name="line-441"></a><span class='hs-definition'>focusGroupMaster</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>focusMasterZ</span>
<a name="line-442"></a>
<a name="line-443"></a><span class='hs-comment'>-- | helper</span>
<a name="line-444"></a><span class='hs-sel'>_removeFocused</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-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Zipper</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-445"></a><span class='hs-sel'>_removeFocused</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'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>u</span><span class='hs-conop'>:</span><span class='hs-varid'>up</span><span class='hs-layout'>)</span> <span class='hs-varid'>down</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Stack</span> <span class='hs-varid'>u</span> <span class='hs-varid'>up</span> <span class='hs-varid'>down</span><span class='hs-layout'>)</span>
<a name="line-446"></a><span class='hs-sel'>_removeFocused</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'>f</span> <span class='hs-conid'>[]</span> <span class='hs-layout'>(</span><span class='hs-varid'>d</span><span class='hs-conop'>:</span><span class='hs-varid'>down</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Stack</span> <span class='hs-varid'>d</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>down</span><span class='hs-layout'>)</span>
<a name="line-447"></a><span class='hs-sel'>_removeFocused</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'>f</span> <span class='hs-conid'>[]</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span><span class='hs-layout'>,</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-448"></a>
<a name="line-449"></a><span class='hs-comment'>-- helper</span>
<a name="line-450"></a><span class='hs-sel'>_moveToNewGroup</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>WithID</span> <span class='hs-varid'>l</span> <span class='hs-conid'>Window</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-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-conid'>Window</span><span class='hs-layout'>)</span>
<a name="line-451"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-conid'>Window</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Zipper</span> <span class='hs-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-conid'>Window</span><span class='hs-layout'>)</span>
<a name="line-452"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Zipper</span> <span class='hs-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-conid'>Window</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-453"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Zipper</span> <span class='hs-layout'>(</span><span class='hs-conid'>Group</span> <span class='hs-varid'>l</span> <span class='hs-conid'>Window</span><span class='hs-layout'>)</span>
<a name="line-454"></a><span class='hs-sel'>_moveToNewGroup</span> <span class='hs-varid'>l0</span> <span class='hs-varid'>s</span> <span class='hs-varid'>insertX</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>G</span> <span class='hs-varid'>l</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>f</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-varid'>focus</span> <span class='hs-varid'>s</span>
<a name="line-455"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span> <span class='hs-varid'>f'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>_removeFocused</span> <span class='hs-varid'>f</span>
<a name="line-456"></a> <span class='hs-varid'>s'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>s</span> <span class='hs-layout'>{</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>focus</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>G</span> <span class='hs-varid'>l</span> <span class='hs-varid'>f'</span> <span class='hs-layout'>}</span>
<a name="line-457"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>insertX</span> <span class='hs-layout'>(</span><span class='hs-conid'>G</span> <span class='hs-varid'>l0</span> <span class='hs-varop'>$</span> <span class='hs-varid'>singletonZ</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>s'</span>
<a name="line-458"></a><span class='hs-sel'>_moveToNewGroup</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>s</span>
<a name="line-459"></a>
<a name="line-460"></a><a name="moveToNewGroupUp"></a><span class='hs-comment'>-- | Move the focused window to a new group before the current one.</span>
<a name="line-461"></a><span class='hs-definition'>moveToNewGroupUp</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModifySpec</span>
<a name="line-462"></a><span class='hs-definition'>moveToNewGroupUp</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-463"></a><span class='hs-definition'>moveToNewGroupUp</span> <span class='hs-varid'>l0</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>_moveToNewGroup</span> <span class='hs-varid'>l0</span> <span class='hs-varid'>s</span> <span class='hs-varid'>insertUpZ</span>
<a name="line-464"></a>
<a name="line-465"></a><a name="moveToNewGroupDown"></a><span class='hs-comment'>-- | Move the focused window to a new group after the current one.</span>
<a name="line-466"></a><span class='hs-definition'>moveToNewGroupDown</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModifySpec</span>
<a name="line-467"></a><span class='hs-definition'>moveToNewGroupDown</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-468"></a><span class='hs-definition'>moveToNewGroupDown</span> <span class='hs-varid'>l0</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>_moveToNewGroup</span> <span class='hs-varid'>l0</span> <span class='hs-varid'>s</span> <span class='hs-varid'>insertDownZ</span>
<a name="line-469"></a>
<a name="line-470"></a>
<a name="line-471"></a><a name="moveToGroupUp"></a><span class='hs-comment'>-- | Move the focused window to the previous group.</span>
<a name="line-472"></a><span class='hs-comment'>-- If 'True', when in the first group, wrap around to the last one.</span>
<a name="line-473"></a><span class='hs-comment'>-- If 'False', create a new group before it.</span>
<a name="line-474"></a><span class='hs-definition'>moveToGroupUp</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ModifySpec</span>
<a name="line-475"></a><span class='hs-definition'>moveToGroupUp</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-476"></a><span class='hs-definition'>moveToGroupUp</span> <span class='hs-conid'>False</span> <span class='hs-varid'>l0</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>up</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>moveToNewGroupUp</span> <span class='hs-varid'>l0</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-477"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>moveToGroupUp</span> <span class='hs-conid'>True</span> <span class='hs-varid'>l0</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-478"></a><span class='hs-definition'>moveToGroupUp</span> <span class='hs-conid'>True</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>s</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-conid'>[]</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>s</span>
<a name="line-479"></a><span class='hs-definition'>moveToGroupUp</span> <span class='hs-conid'>True</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>s</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-layout'>(</span><span class='hs-conid'>G</span> <span class='hs-varid'>l</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-480"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span> <span class='hs-varid'>f'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>_removeFocused</span> <span class='hs-varid'>f</span>
<a name="line-481"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>onFocusedZ</span> <span class='hs-layout'>(</span><span class='hs-varid'>onZipper</span> <span class='hs-varop'>$</span> <span class='hs-varid'>insertUpZ</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>focusUpZ</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>s</span> <span class='hs-layout'>{</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>focus</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>G</span> <span class='hs-varid'>l</span> <span class='hs-varid'>f'</span> <span class='hs-layout'>}</span>
<a name="line-482"></a><span class='hs-definition'>moveToGroupUp</span> <span class='hs-conid'>True</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>gs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>gs</span>
<a name="line-483"></a>
<a name="line-484"></a><a name="moveToGroupDown"></a><span class='hs-comment'>-- | Move the focused window to the next group.</span>
<a name="line-485"></a><span class='hs-comment'>-- If 'True', when in the last group, wrap around to the first one.</span>
<a name="line-486"></a><span class='hs-comment'>-- If 'False', create a new group after it.</span>
<a name="line-487"></a><span class='hs-definition'>moveToGroupDown</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ModifySpec</span>
<a name="line-488"></a><span class='hs-definition'>moveToGroupDown</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-489"></a><span class='hs-definition'>moveToGroupDown</span> <span class='hs-conid'>False</span> <span class='hs-varid'>l0</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>down</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>moveToNewGroupDown</span> <span class='hs-varid'>l0</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-490"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>moveToGroupDown</span> <span class='hs-conid'>True</span> <span class='hs-varid'>l0</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-491"></a><span class='hs-definition'>moveToGroupDown</span> <span class='hs-conid'>True</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>s</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-conid'>[]</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>s</span>
<a name="line-492"></a><span class='hs-definition'>moveToGroupDown</span> <span class='hs-conid'>True</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>s</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-layout'>(</span><span class='hs-conid'>G</span> <span class='hs-varid'>l</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-493"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span> <span class='hs-varid'>f'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>_removeFocused</span> <span class='hs-varid'>f</span>
<a name="line-494"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>onFocusedZ</span> <span class='hs-layout'>(</span><span class='hs-varid'>onZipper</span> <span class='hs-varop'>$</span> <span class='hs-varid'>insertUpZ</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>focusDownZ</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>s</span> <span class='hs-layout'>{</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>focus</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>G</span> <span class='hs-varid'>l</span> <span class='hs-varid'>f'</span> <span class='hs-layout'>}</span>
<a name="line-495"></a><span class='hs-definition'>moveToGroupDown</span> <span class='hs-conid'>True</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>gs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>gs</span>
<a name="line-496"></a>
<a name="line-497"></a><a name="splitGroup"></a><span class='hs-comment'>-- | Split the focused group into two at the position of the focused window (below it,</span>
<a name="line-498"></a><span class='hs-comment'>-- unless it's the last window - in that case, above it).</span>
<a name="line-499"></a><span class='hs-definition'>splitGroup</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModifySpec</span>
<a name="line-500"></a><span class='hs-definition'>splitGroup</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-501"></a><span class='hs-definition'>splitGroup</span> <span class='hs-varid'>l0</span> <span class='hs-varid'>z</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>G</span> <span class='hs-varid'>l</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>ws</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-varid'>focus</span> <span class='hs-varid'>s</span>
<a name="line-502"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>ws</span> <span class='hs-keyword'>of</span>
<a name="line-503"></a> <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-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>z</span>
<a name="line-504"></a> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Stack</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>u</span><span class='hs-conop'>:</span><span class='hs-varid'>up</span><span class='hs-layout'>)</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>let</span> <span class='hs-varid'>g1</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>G</span> <span class='hs-varid'>l</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Stack</span> <span class='hs-varid'>f</span> <span class='hs-conid'>[]</span> <span class='hs-conid'>[]</span>
<a name="line-505"></a> <span class='hs-varid'>g2</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>G</span> <span class='hs-varid'>l0</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Stack</span> <span class='hs-varid'>u</span> <span class='hs-varid'>up</span> <span class='hs-conid'>[]</span>
<a name="line-506"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>insertDownZ</span> <span class='hs-varid'>g1</span> <span class='hs-varop'>$</span> <span class='hs-varid'>onFocusedZ</span> <span class='hs-layout'>(</span><span class='hs-varid'>const</span> <span class='hs-varid'>g2</span><span class='hs-layout'>)</span> <span class='hs-varid'>z</span>
<a name="line-507"></a> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Stack</span> <span class='hs-varid'>f</span> <span class='hs-varid'>up</span> <span class='hs-layout'>(</span><span class='hs-varid'>d</span><span class='hs-conop'>:</span><span class='hs-varid'>down</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>let</span> <span class='hs-varid'>g1</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>G</span> <span class='hs-varid'>l</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Stack</span> <span class='hs-varid'>f</span> <span class='hs-varid'>up</span> <span class='hs-conid'>[]</span>
<a name="line-508"></a> <span class='hs-varid'>g2</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>G</span> <span class='hs-varid'>l0</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Stack</span> <span class='hs-varid'>d</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>down</span>
<a name="line-509"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>insertUpZ</span> <span class='hs-varid'>g1</span> <span class='hs-varop'>$</span> <span class='hs-varid'>onFocusedZ</span> <span class='hs-layout'>(</span><span class='hs-varid'>const</span> <span class='hs-varid'>g2</span><span class='hs-layout'>)</span> <span class='hs-varid'>z</span>
<a name="line-510"></a><span class='hs-definition'>splitGroup</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
</pre></body>
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