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<title>XMonad/Layout/Combo.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE FlexibleContexts, FlexibleInstances, MultiParamTypeClasses,
<a name="line-2"></a> UndecidableInstances, PatternGuards #-}</span>
<a name="line-3"></a>
<a name="line-4"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-5"></a><span class='hs-comment'>-- |</span>
<a name="line-6"></a><span class='hs-comment'>-- Module : XMonad.Layout.Combo</span>
<a name="line-7"></a><span class='hs-comment'>-- Copyright : (c) David Roundy <droundy@darcs.net></span>
<a name="line-8"></a><span class='hs-comment'>-- License : BSD-style (see LICENSE)</span>
<a name="line-9"></a><span class='hs-comment'>--</span>
<a name="line-10"></a><span class='hs-comment'>-- Maintainer : none</span>
<a name="line-11"></a><span class='hs-comment'>-- Stability : unstable</span>
<a name="line-12"></a><span class='hs-comment'>-- Portability : unportable</span>
<a name="line-13"></a><span class='hs-comment'>--</span>
<a name="line-14"></a><span class='hs-comment'>-- A layout that combines multiple layouts.</span>
<a name="line-15"></a><span class='hs-comment'>--</span>
<a name="line-16"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-17"></a>
<a name="line-18"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Layout</span><span class='hs-varop'>.</span><span class='hs-conid'>Combo</span> <span class='hs-layout'>(</span>
<a name="line-19"></a> <span class='hs-comment'>-- * Usage</span>
<a name="line-20"></a> <span class='hs-comment'>-- $usage</span>
<a name="line-21"></a> <span class='hs-varid'>combineTwo</span><span class='hs-layout'>,</span>
<a name="line-22"></a> <span class='hs-conid'>CombineTwo</span>
<a name="line-23"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-24"></a>
<a name="line-25"></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-varid'>delete</span><span class='hs-layout'>,</span> <span class='hs-varid'>intersect</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-26"></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>
<a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-varid'>focus</span><span class='hs-layout'>)</span>
<a name="line-28"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>StackSet</span> <span class='hs-layout'>(</span> <span class='hs-varid'>integrate'</span><span class='hs-layout'>,</span> <span class='hs-conid'>Workspace</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>Stack</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-29"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Layout</span><span class='hs-varop'>.</span><span class='hs-conid'>WindowNavigation</span> <span class='hs-layout'>(</span> <span class='hs-conid'>MoveWindowToWindow</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-30"></a><span class='hs-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> <span class='hs-layout'>(</span> <span class='hs-varid'>differentiate</span> <span class='hs-layout'>)</span>
<a name="line-31"></a>
<a name="line-32"></a><span class='hs-comment'>-- $usage</span>
<a name="line-33"></a><span class='hs-comment'>-- You can use this module with the following in your @~\/.xmonad\/xmonad.hs@:</span>
<a name="line-34"></a><span class='hs-comment'>--</span>
<a name="line-35"></a><span class='hs-comment'>-- > import XMonad.Layout.Combo</span>
<a name="line-36"></a><span class='hs-comment'>--</span>
<a name="line-37"></a><span class='hs-comment'>-- and add something like</span>
<a name="line-38"></a><span class='hs-comment'>--</span>
<a name="line-39"></a><span class='hs-comment'>-- > combineTwo (TwoPane 0.03 0.5) (tabbed shrinkText defaultTConf) (tabbed shrinkText defaultTConf)</span>
<a name="line-40"></a><span class='hs-comment'>--</span>
<a name="line-41"></a><span class='hs-comment'>-- to your layouts.</span>
<a name="line-42"></a><span class='hs-comment'>--</span>
<a name="line-43"></a><span class='hs-comment'>-- For more detailed instructions on editing the layoutHook see:</span>
<a name="line-44"></a><span class='hs-comment'>--</span>
<a name="line-45"></a><span class='hs-comment'>-- "XMonad.Doc.Extending#Editing_the_layout_hook"</span>
<a name="line-46"></a><span class='hs-comment'>--</span>
<a name="line-47"></a><span class='hs-comment'>-- combineTwo is a new simple layout combinator. It allows the</span>
<a name="line-48"></a><span class='hs-comment'>-- combination of two layouts using a third to split the screen</span>
<a name="line-49"></a><span class='hs-comment'>-- between the two, but has the advantage of allowing you to</span>
<a name="line-50"></a><span class='hs-comment'>-- dynamically adjust the layout, in terms of the number of windows in</span>
<a name="line-51"></a><span class='hs-comment'>-- each sublayout. To do this, use "XMonad.Layout.WindowNavigation",</span>
<a name="line-52"></a><span class='hs-comment'>-- and add the following key bindings (or something similar):</span>
<a name="line-53"></a><span class='hs-comment'>--</span>
<a name="line-54"></a><span class='hs-comment'>-- > , ((modm .|. controlMask .|. shiftMask, xK_Right), sendMessage $ Move R)</span>
<a name="line-55"></a><span class='hs-comment'>-- > , ((modm .|. controlMask .|. shiftMask, xK_Left ), sendMessage $ Move L)</span>
<a name="line-56"></a><span class='hs-comment'>-- > , ((modm .|. controlMask .|. shiftMask, xK_Up ), sendMessage $ Move U)</span>
<a name="line-57"></a><span class='hs-comment'>-- > , ((modm .|. controlMask .|. shiftMask, xK_Down ), sendMessage $ Move D)</span>
<a name="line-58"></a><span class='hs-comment'>--</span>
<a name="line-59"></a><span class='hs-comment'>-- For detailed instruction on editing the key binding see</span>
<a name="line-60"></a><span class='hs-comment'>-- "XMonad.Doc.Extending#Editing_key_bindings".</span>
<a name="line-61"></a><span class='hs-comment'>--</span>
<a name="line-62"></a><span class='hs-comment'>-- These bindings will move a window into the sublayout that is</span>
<a name="line-63"></a><span class='hs-comment'>-- up\/down\/left\/right of its current position. Note that there is some</span>
<a name="line-64"></a><span class='hs-comment'>-- weirdness in combineTwo, in that the mod-tab focus order is not very closely</span>
<a name="line-65"></a><span class='hs-comment'>-- related to the layout order. This is because we're forced to keep track of</span>
<a name="line-66"></a><span class='hs-comment'>-- the window positions separately, and this is ugly. If you don't like this,</span>
<a name="line-67"></a><span class='hs-comment'>-- lobby for hierarchical stacks in core xmonad or go reimplement the core of</span>
<a name="line-68"></a><span class='hs-comment'>-- xmonad yourself.</span>
<a name="line-69"></a>
<a name="line-70"></a><a name="CombineTwo"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>CombineTwo</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C2</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-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-varid'>l</span> <span class='hs-layout'>(</span><span class='hs-varid'>l1</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>l2</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-71"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Read</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span><span class='hs-layout'>)</span>
<a name="line-72"></a>
<a name="line-73"></a><a name="combineTwo"></a><span class='hs-definition'>combineTwo</span> <span class='hs-keyglyph'>::</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'>Eq</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>LayoutClass</span> <span class='hs-varid'>super</span> <span class='hs-conid'>()</span><span class='hs-layout'>,</span> <span class='hs-conid'>LayoutClass</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>LayoutClass</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span>
<a name="line-74"></a> <span class='hs-varid'>super</span> <span class='hs-conid'>()</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>l1</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CombineTwo</span> <span class='hs-layout'>(</span><span class='hs-varid'>super</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span>
<a name="line-75"></a><span class='hs-definition'>combineTwo</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C2</span> <span class='hs-conid'>[]</span> <span class='hs-conid'>[]</span>
<a name="line-76"></a>
<a name="line-77"></a><a name="instance%20LayoutClass%20(CombineTwo%20(l%20())%20l1%20l2)%20a"></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'>()</span><span class='hs-layout'>,</span> <span class='hs-conid'>LayoutClass</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>LayoutClass</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</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'>Show</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Eq</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Typeable</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-78"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>LayoutClass</span> <span class='hs-layout'>(</span><span class='hs-conid'>CombineTwo</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>l2</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-keyword'>where</span>
<a name="line-79"></a> <span class='hs-varid'>runLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>Workspace</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>C2</span> <span class='hs-varid'>f</span> <span class='hs-varid'>w2</span> <span class='hs-varid'>super</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>l2</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varid'>rinput</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>arrange</span> <span class='hs-layout'>(</span><span class='hs-varid'>integrate'</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-80"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>arrange</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>l1'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>maybe</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>id</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>l1</span> <span class='hs-layout'>(</span><span class='hs-conid'>SomeMessage</span> <span class='hs-conid'>ReleaseResources</span><span class='hs-layout'>)</span>
<a name="line-81"></a> <span class='hs-varid'>l2'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>maybe</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>id</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>l2</span> <span class='hs-layout'>(</span><span class='hs-conid'>SomeMessage</span> <span class='hs-conid'>ReleaseResources</span><span class='hs-layout'>)</span>
<a name="line-82"></a> <span class='hs-varid'>super'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>maybe</span> <span class='hs-varid'>super</span> <span class='hs-varid'>id</span> <span class='hs-varop'>`fmap`</span>
<a name="line-83"></a> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>super</span> <span class='hs-layout'>(</span><span class='hs-conid'>SomeMessage</span> <span class='hs-conid'>ReleaseResources</span><span class='hs-layout'>)</span>
<a name="line-84"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>[]</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>C2</span> <span class='hs-conid'>[]</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>super'</span> <span class='hs-varid'>l1'</span> <span class='hs-varid'>l2'</span><span class='hs-layout'>)</span>
<a name="line-85"></a> <span class='hs-varid'>arrange</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>w</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>l1'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>maybe</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>id</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>l1</span> <span class='hs-layout'>(</span><span class='hs-conid'>SomeMessage</span> <span class='hs-conid'>ReleaseResources</span><span class='hs-layout'>)</span>
<a name="line-86"></a> <span class='hs-varid'>l2'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>maybe</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>id</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>l2</span> <span class='hs-layout'>(</span><span class='hs-conid'>SomeMessage</span> <span class='hs-conid'>ReleaseResources</span><span class='hs-layout'>)</span>
<a name="line-87"></a> <span class='hs-varid'>super'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>maybe</span> <span class='hs-varid'>super</span> <span class='hs-varid'>id</span> <span class='hs-varop'>`fmap`</span>
<a name="line-88"></a> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>super</span> <span class='hs-layout'>(</span><span class='hs-conid'>SomeMessage</span> <span class='hs-conid'>ReleaseResources</span><span class='hs-layout'>)</span>
<a name="line-89"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span><span class='hs-varid'>rinput</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>C2</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>w</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>w</span><span class='hs-keyglyph'>]</span> <span class='hs-varid'>super'</span> <span class='hs-varid'>l1'</span> <span class='hs-varid'>l2'</span><span class='hs-layout'>)</span>
<a name="line-90"></a> <span class='hs-varid'>arrange</span> <span class='hs-varid'>origws</span> <span class='hs-keyglyph'>=</span>
<a name="line-91"></a> <span class='hs-keyword'>do</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>w2'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>origws</span> <span class='hs-varop'>`intersect`</span> <span class='hs-varid'>w2</span> <span class='hs-keyword'>of</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>head</span> <span class='hs-varid'>origws</span><span class='hs-keyglyph'>]</span>
<a name="line-92"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span>
<a name="line-93"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>origws</span> <span class='hs-varop'>\\</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span>
<a name="line-94"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>init</span> <span class='hs-varid'>x</span>
<a name="line-95"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>x</span>
<a name="line-96"></a> <span class='hs-varid'>superstack</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Stack</span> <span class='hs-layout'>{</span> <span class='hs-varid'>focus</span><span class='hs-keyglyph'>=</span><span class='hs-conid'>()</span><span class='hs-layout'>,</span> <span class='hs-varid'>up</span><span class='hs-keyglyph'>=</span><span class='hs-conid'>[]</span><span class='hs-layout'>,</span> <span class='hs-varid'>down</span><span class='hs-keyglyph'>=</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>()</span><span class='hs-keyglyph'>]</span> <span class='hs-layout'>}</span>
<a name="line-97"></a> <span class='hs-varid'>s1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>differentiate</span> <span class='hs-varid'>f'</span> <span class='hs-layout'>(</span><span class='hs-varid'>origws</span> <span class='hs-varop'>\\</span> <span class='hs-varid'>w2'</span><span class='hs-layout'>)</span>
<a name="line-98"></a> <span class='hs-varid'>s2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>differentiate</span> <span class='hs-varid'>f'</span> <span class='hs-varid'>w2'</span>
<a name="line-99"></a> <span class='hs-varid'>f'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>of</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'>focus</span> <span class='hs-varid'>s'</span><span class='hs-conop'>:</span><span class='hs-varid'>delete</span> <span class='hs-layout'>(</span><span class='hs-varid'>focus</span> <span class='hs-varid'>s'</span><span class='hs-layout'>)</span> <span class='hs-varid'>f</span>
<a name="line-100"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span>
<a name="line-101"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>()</span><span class='hs-layout'>,</span><span class='hs-varid'>r1</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-layout'>(</span><span class='hs-conid'>()</span><span class='hs-layout'>,</span><span class='hs-varid'>r2</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-varid'>msuper'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>runLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>Workspace</span> <span class='hs-str'>""</span> <span class='hs-varid'>super</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>superstack</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>rinput</span>
<a name="line-102"></a> <span class='hs-layout'>(</span><span class='hs-varid'>wrs1</span><span class='hs-layout'>,</span> <span class='hs-varid'>ml1'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>runLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>Workspace</span> <span class='hs-str'>""</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>s1</span><span class='hs-layout'>)</span> <span class='hs-varid'>r1</span>
<a name="line-103"></a> <span class='hs-layout'>(</span><span class='hs-varid'>wrs2</span><span class='hs-layout'>,</span> <span class='hs-varid'>ml2'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>runLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>Workspace</span> <span class='hs-str'>""</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>s2</span><span class='hs-layout'>)</span> <span class='hs-varid'>r2</span>
<a name="line-104"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>wrs1</span><span class='hs-varop'>++</span><span class='hs-varid'>wrs2</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>C2</span> <span class='hs-varid'>f'</span> <span class='hs-varid'>w2'</span>
<a name="line-105"></a> <span class='hs-layout'>(</span><span class='hs-varid'>maybe</span> <span class='hs-varid'>super</span> <span class='hs-varid'>id</span> <span class='hs-varid'>msuper'</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>maybe</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>id</span> <span class='hs-varid'>ml1'</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>maybe</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>id</span> <span class='hs-varid'>ml2'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-106"></a> <span class='hs-varid'>handleMessage</span> <span class='hs-layout'>(</span><span class='hs-conid'>C2</span> <span class='hs-varid'>f</span> <span class='hs-varid'>ws2</span> <span class='hs-varid'>super</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>l2</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span>
<a name="line-107"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>MoveWindowToWindow</span> <span class='hs-varid'>w1</span> <span class='hs-varid'>w2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span>
<a name="line-108"></a> <span class='hs-varid'>w1</span> <span class='hs-varop'>`notElem`</span> <span class='hs-varid'>ws2</span><span class='hs-layout'>,</span>
<a name="line-109"></a> <span class='hs-varid'>w2</span> <span class='hs-varop'>`elem`</span> <span class='hs-varid'>ws2</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>l1'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>maybe</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>id</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>m</span>
<a name="line-110"></a> <span class='hs-varid'>l2'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>maybe</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>id</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>m</span>
<a name="line-111"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>C2</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>w1</span><span class='hs-conop'>:</span><span class='hs-varid'>ws2</span><span class='hs-layout'>)</span> <span class='hs-varid'>super</span> <span class='hs-varid'>l1'</span> <span class='hs-varid'>l2'</span>
<a name="line-112"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>MoveWindowToWindow</span> <span class='hs-varid'>w1</span> <span class='hs-varid'>w2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span>
<a name="line-113"></a> <span class='hs-varid'>w1</span> <span class='hs-varop'>`elem`</span> <span class='hs-varid'>ws2</span><span class='hs-layout'>,</span>
<a name="line-114"></a> <span class='hs-varid'>w2</span> <span class='hs-varop'>`notElem`</span> <span class='hs-varid'>ws2</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>l1'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>maybe</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>id</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>m</span>
<a name="line-115"></a> <span class='hs-varid'>l2'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>maybe</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>id</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>m</span>
<a name="line-116"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>ws2'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>delete</span> <span class='hs-varid'>w1</span> <span class='hs-varid'>ws2</span> <span class='hs-keyword'>of</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>w2</span><span class='hs-keyglyph'>]</span>
<a name="line-117"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>x</span>
<a name="line-118"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>C2</span> <span class='hs-varid'>f</span> <span class='hs-varid'>ws2'</span> <span class='hs-varid'>super</span> <span class='hs-varid'>l1'</span> <span class='hs-varid'>l2'</span>
<a name="line-119"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>ml1'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>broadcastPrivate</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>l1</span><span class='hs-keyglyph'>]</span>
<a name="line-120"></a> <span class='hs-varid'>ml2'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>broadcastPrivate</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>l2</span><span class='hs-keyglyph'>]</span>
<a name="line-121"></a> <span class='hs-varid'>msuper'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>broadcastPrivate</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>super</span><span class='hs-keyglyph'>]</span>
<a name="line-122"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>isJust</span> <span class='hs-varid'>msuper'</span> <span class='hs-varop'>||</span> <span class='hs-varid'>isJust</span> <span class='hs-varid'>ml1'</span> <span class='hs-varop'>||</span> <span class='hs-varid'>isJust</span> <span class='hs-varid'>ml2'</span>
<a name="line-123"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>C2</span> <span class='hs-varid'>f</span> <span class='hs-varid'>ws2</span>
<a name="line-124"></a> <span class='hs-layout'>(</span><span class='hs-varid'>maybe</span> <span class='hs-varid'>super</span> <span class='hs-varid'>head</span> <span class='hs-varid'>msuper'</span><span class='hs-layout'>)</span>
<a name="line-125"></a> <span class='hs-layout'>(</span><span class='hs-varid'>maybe</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>head</span> <span class='hs-varid'>ml1'</span><span class='hs-layout'>)</span>
<a name="line-126"></a> <span class='hs-layout'>(</span><span class='hs-varid'>maybe</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>head</span> <span class='hs-varid'>ml2'</span><span class='hs-layout'>)</span>
<a name="line-127"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-128"></a> <span class='hs-varid'>description</span> <span class='hs-layout'>(</span><span class='hs-conid'>C2</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>super</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>l2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"combining "</span><span class='hs-varop'>++</span> <span class='hs-varid'>description</span> <span class='hs-varid'>l1</span> <span class='hs-varop'>++</span><span class='hs-str'>" and "</span><span class='hs-varop'>++</span>
<a name="line-129"></a> <span class='hs-varid'>description</span> <span class='hs-varid'>l2</span> <span class='hs-varop'>++</span><span class='hs-str'>" with "</span><span class='hs-varop'>++</span> <span class='hs-varid'>description</span> <span class='hs-varid'>super</span>
<a name="line-130"></a>
<a name="line-131"></a>
<a name="line-132"></a><a name="differentiate"></a><span class='hs-definition'>differentiate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Eq</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'>=></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>q</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>q</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'>Stack</span> <span class='hs-varid'>q</span><span class='hs-layout'>)</span>
<a name="line-133"></a><span class='hs-definition'>differentiate</span> <span class='hs-layout'>(</span><span class='hs-varid'>z</span><span class='hs-conop'>:</span><span class='hs-varid'>zs</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>z</span> <span class='hs-varop'>`elem`</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Stack</span> <span class='hs-layout'>{</span> <span class='hs-varid'>focus</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>z</span>
<a name="line-134"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>up</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>reverse</span> <span class='hs-varop'>$</span> <span class='hs-varid'>takeWhile</span> <span class='hs-layout'>(</span><span class='hs-varop'>/=</span><span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span>
<a name="line-135"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>down</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>tail</span> <span class='hs-varop'>$</span> <span class='hs-varid'>dropWhile</span> <span class='hs-layout'>(</span><span class='hs-varop'>/=</span><span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span> <span class='hs-layout'>}</span>
<a name="line-136"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>differentiate</span> <span class='hs-varid'>zs</span> <span class='hs-varid'>xs</span>
<a name="line-137"></a><span class='hs-definition'>differentiate</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>differentiate</span> <span class='hs-varid'>xs</span>
<a name="line-138"></a>
<a name="line-139"></a><a name="broadcastPrivate"></a><span class='hs-definition'>broadcastPrivate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>LayoutClass</span> <span class='hs-varid'>l</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>SomeMessage</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>l</span> <span class='hs-varid'>b</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>l</span> <span class='hs-varid'>b</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-140"></a><span class='hs-definition'>broadcastPrivate</span> <span class='hs-varid'>a</span> <span class='hs-varid'>ol</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>nml</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mapM</span> <span class='hs-varid'>f</span> <span class='hs-varid'>ol</span>
<a name="line-141"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>any</span> <span class='hs-varid'>isJust</span> <span class='hs-varid'>nml</span>
<a name="line-142"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>zipWith</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>flip</span> <span class='hs-varid'>maybe</span><span class='hs-layout'>)</span> <span class='hs-varid'>id</span><span class='hs-layout'>)</span> <span class='hs-varid'>ol</span> <span class='hs-varid'>nml</span>
<a name="line-143"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-144"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>f</span> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`catchX`</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
</pre></body>
</html>
