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<title>XMonad/Layout/AutoMaster.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE FlexibleInstances, MultiParamTypeClasses, TypeSynonymInstances, FlexibleContexts #-}</span>
<a name="line-2"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-3"></a><span class='hs-comment'>-- |</span>
<a name="line-4"></a><span class='hs-comment'>-- Module : XMonad.Layout.AutoMaster</span>
<a name="line-5"></a><span class='hs-comment'>-- Copyright : (c) 2009 Ilya Portnov</span>
<a name="line-6"></a><span class='hs-comment'>-- License : BSD3-style (see LICENSE)</span>
<a name="line-7"></a><span class='hs-comment'>--</span>
<a name="line-8"></a><span class='hs-comment'>-- Maintainer : Ilya Portnov <portnov84@rambler.ru></span>
<a name="line-9"></a><span class='hs-comment'>-- Stability : unstable</span>
<a name="line-10"></a><span class='hs-comment'>-- Portability : unportable</span>
<a name="line-11"></a><span class='hs-comment'>--</span>
<a name="line-12"></a><span class='hs-comment'>-- Provides layout modifier AutoMaster. It separates screen in two parts -</span>
<a name="line-13"></a><span class='hs-comment'>-- master and slave. Size of slave area automatically changes depending on</span>
<a name="line-14"></a><span class='hs-comment'>-- number of slave windows.</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'>AutoMaster</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'>autoMaster</span><span class='hs-layout'>,</span> <span class='hs-conid'>AutoMaster</span>
<a name="line-22"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-23"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span>
<a name="line-24"></a>
<a name="line-25"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span>
<a name="line-26"></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-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Layout</span><span class='hs-varop'>.</span><span class='hs-conid'>LayoutModifier</span>
<a name="line-28"></a>
<a name="line-29"></a><span class='hs-comment'>-- $usage</span>
<a name="line-30"></a><span class='hs-comment'>-- This module defines layout modifier named autoMaster. It separates</span>
<a name="line-31"></a><span class='hs-comment'>-- screen in two parts - master and slave. Master windows are arranged</span>
<a name="line-32"></a><span class='hs-comment'>-- in one row, in slave area underlying layout is run. Size of slave area</span>
<a name="line-33"></a><span class='hs-comment'>-- automatically increases when number of slave windows is increasing.</span>
<a name="line-34"></a><span class='hs-comment'>--</span>
<a name="line-35"></a><span class='hs-comment'>-- You can use this module by adding folowing in your @xmonad.hs@:</span>
<a name="line-36"></a><span class='hs-comment'>--</span>
<a name="line-37"></a><span class='hs-comment'>-- > import XMonad.Layout.AutoMaster</span>
<a name="line-38"></a><span class='hs-comment'>--</span>
<a name="line-39"></a><span class='hs-comment'>-- Then add layouts to your layoutHook:</span>
<a name="line-40"></a><span class='hs-comment'>--</span>
<a name="line-41"></a><span class='hs-comment'>-- > myLayoutHook = autoMaster 1 (1/100) Grid ||| ...</span>
<a name="line-42"></a><span class='hs-comment'>--</span>
<a name="line-43"></a><span class='hs-comment'>-- In this example, master area by default contains 1 window (you can</span>
<a name="line-44"></a><span class='hs-comment'>-- change this number in runtime with usual IncMasterN message), changing</span>
<a name="line-45"></a><span class='hs-comment'>-- slave area size with 1/100 on each Shrink/Expand message.</span>
<a name="line-46"></a>
<a name="line-47"></a><a name="AutoMaster"></a><span class='hs-comment'>-- | Data type for layout modifier</span>
<a name="line-48"></a><a name="AutoMaster"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>AutoMaster</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>AutoMaster</span> <span class='hs-conid'>Int</span> <span class='hs-conid'>Float</span> <span class='hs-conid'>Float</span>
<a name="line-49"></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-50"></a>
<a name="line-51"></a><a name="instance%20LayoutModifier%20AutoMaster%20w"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>LayoutModifier</span> <span class='hs-conid'>AutoMaster</span> <span class='hs-varid'>w</span> <span class='hs-keyword'>where</span>
<a name="line-52"></a> <span class='hs-varid'>modifyLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>AutoMaster</span> <span class='hs-varid'>k</span> <span class='hs-varid'>bias</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>autoLayout</span> <span class='hs-varid'>k</span> <span class='hs-varid'>bias</span>
<a name="line-53"></a> <span class='hs-varid'>pureMess</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>autoMess</span>
<a name="line-54"></a>
<a name="line-55"></a><a name="autoMess"></a><span class='hs-comment'>-- | Handle Shrink/Expand and IncMasterN messages</span>
<a name="line-56"></a><span class='hs-definition'>autoMess</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>AutoMaster</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SomeMessage</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>AutoMaster</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-57"></a><span class='hs-definition'>autoMess</span> <span class='hs-layout'>(</span><span class='hs-conid'>AutoMaster</span> <span class='hs-varid'>k</span> <span class='hs-varid'>bias</span> <span class='hs-varid'>delta</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>msum</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>resize</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromMessage</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-58"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>incmastern</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromMessage</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-59"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>incmastern</span> <span class='hs-layout'>(</span><span class='hs-conid'>IncMasterN</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>AutoMaster</span> <span class='hs-layout'>(</span><span class='hs-varid'>max</span> <span class='hs-num'>1</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span><span class='hs-varop'>+</span><span class='hs-varid'>d</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>bias</span> <span class='hs-varid'>delta</span>
<a name="line-60"></a> <span class='hs-varid'>resize</span> <span class='hs-conid'>Expand</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>AutoMaster</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-varid'>min</span> <span class='hs-layout'>(</span> <span class='hs-num'>0.4</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>bias</span><span class='hs-varop'>+</span><span class='hs-varid'>delta</span><span class='hs-layout'>)</span> <span class='hs-varid'>delta</span>
<a name="line-61"></a> <span class='hs-varid'>resize</span> <span class='hs-conid'>Shrink</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>AutoMaster</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-varid'>max</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-num'>0.4</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>bias</span><span class='hs-comment'>-</span><span class='hs-varid'>delta</span><span class='hs-layout'>)</span> <span class='hs-varid'>delta</span>
<a name="line-62"></a>
<a name="line-63"></a><a name="autoLayout"></a><span class='hs-comment'>-- | Main layout function</span>
<a name="line-64"></a><span class='hs-definition'>autoLayout</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span> <span class='hs-varid'>w</span><span class='hs-layout'>,</span> <span class='hs-conid'>LayoutClass</span> <span class='hs-varid'>l</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span>
<a name="line-65"></a> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span>
<a name="line-66"></a> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span>
<a name="line-67"></a> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Workspace</span> <span class='hs-conid'>WorkspaceId</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-varid'>w</span>
<a name="line-68"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rectangle</span>
<a name="line-69"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</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-conid'>Rectangle</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-70"></a><span class='hs-definition'>autoLayout</span> <span class='hs-varid'>k</span> <span class='hs-varid'>bias</span> <span class='hs-varid'>wksp</span> <span class='hs-varid'>rect</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-71"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>stack</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>stack</span> <span class='hs-varid'>wksp</span>
<a name="line-72"></a> <span class='hs-keyword'>let</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-varid'>integrate'</span> <span class='hs-varid'>stack</span>
<a name="line-73"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>length</span> <span class='hs-varid'>ws</span>
<a name="line-74"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-varid'>ws</span> <span class='hs-keyword'>then</span>
<a name="line-75"></a> <span class='hs-varid'>runLayout</span> <span class='hs-varid'>wksp</span> <span class='hs-varid'>rect</span>
<a name="line-76"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span>
<a name="line-77"></a> <span class='hs-keyword'>if</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-varop'><=</span><span class='hs-varid'>k</span><span class='hs-layout'>)</span> <span class='hs-keyword'>then</span>
<a name="line-78"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>divideRow</span> <span class='hs-varid'>rect</span> <span class='hs-varid'>ws</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-79"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span>
<a name="line-80"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>master</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>take</span> <span class='hs-varid'>k</span> <span class='hs-varid'>ws</span>
<a name="line-81"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>filtStack</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>stack</span> <span class='hs-varop'>>>=</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>w</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>not</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span> <span class='hs-varop'>`elem`</span> <span class='hs-varid'>master</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-82"></a> <span class='hs-varid'>wrs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>runLayout</span> <span class='hs-layout'>(</span><span class='hs-varid'>wksp</span> <span class='hs-layout'>{</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>stack</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>filtStack</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>slaveRect</span> <span class='hs-varid'>rect</span> <span class='hs-varid'>n</span> <span class='hs-varid'>bias</span><span class='hs-layout'>)</span>
<a name="line-83"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>divideRow</span> <span class='hs-layout'>(</span><span class='hs-varid'>masterRect</span> <span class='hs-varid'>rect</span> <span class='hs-varid'>n</span> <span class='hs-varid'>bias</span><span class='hs-layout'>)</span> <span class='hs-varid'>master</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span> <span class='hs-layout'>(</span><span class='hs-varid'>fst</span> <span class='hs-varid'>wrs</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-84"></a> <span class='hs-varid'>snd</span> <span class='hs-varid'>wrs</span><span class='hs-layout'>)</span>
<a name="line-85"></a>
<a name="line-86"></a><a name="masterHeight"></a><span class='hs-comment'>-- | Calculates height of master area, depending on number of windows.</span>
<a name="line-87"></a><span class='hs-definition'>masterHeight</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span>
<a name="line-88"></a><span class='hs-definition'>masterHeight</span> <span class='hs-varid'>n</span> <span class='hs-varid'>bias</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>calcHeight</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varop'>+</span> <span class='hs-varid'>bias</span>
<a name="line-89"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>calcHeight</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span>
<a name="line-90"></a> <span class='hs-varid'>calcHeight</span> <span class='hs-num'>1</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>1.0</span>
<a name="line-91"></a> <span class='hs-varid'>calcHeight</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-layout'>(</span><span class='hs-varid'>m</span><span class='hs-varop'><</span><span class='hs-num'>9</span><span class='hs-layout'>)</span> <span class='hs-keyword'>then</span> <span class='hs-layout'>(</span><span class='hs-num'>43</span><span class='hs-varop'>/</span><span class='hs-num'>45</span><span class='hs-layout'>)</span> <span class='hs-comment'>-</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span><span class='hs-varop'>*</span><span class='hs-layout'>(</span><span class='hs-num'>7</span><span class='hs-varop'>/</span><span class='hs-num'>90</span><span class='hs-layout'>)</span> <span class='hs-keyword'>else</span> <span class='hs-layout'>(</span><span class='hs-num'>1</span><span class='hs-varop'>/</span><span class='hs-num'>3</span><span class='hs-layout'>)</span>
<a name="line-92"></a>
<a name="line-93"></a><a name="masterRect"></a><span class='hs-comment'>-- | Rectangle for master area</span>
<a name="line-94"></a><span class='hs-definition'>masterRect</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Rectangle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rectangle</span>
<a name="line-95"></a><span class='hs-definition'>masterRect</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rectangle</span> <span class='hs-varid'>sx</span> <span class='hs-varid'>sy</span> <span class='hs-varid'>sw</span> <span class='hs-varid'>sh</span><span class='hs-layout'>)</span> <span class='hs-varid'>n</span> <span class='hs-varid'>bias</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Rectangle</span> <span class='hs-varid'>sx</span> <span class='hs-varid'>sy</span> <span class='hs-varid'>sw</span> <span class='hs-varid'>h</span>
<a name="line-96"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>round</span> <span class='hs-varop'>$</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>sh</span><span class='hs-layout'>)</span><span class='hs-varop'>*</span><span class='hs-layout'>(</span><span class='hs-varid'>masterHeight</span> <span class='hs-varid'>n</span> <span class='hs-varid'>bias</span><span class='hs-layout'>)</span>
<a name="line-97"></a>
<a name="line-98"></a><a name="slaveRect"></a><span class='hs-comment'>-- | Rectangle for slave area</span>
<a name="line-99"></a><span class='hs-definition'>slaveRect</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Rectangle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rectangle</span>
<a name="line-100"></a><span class='hs-definition'>slaveRect</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rectangle</span> <span class='hs-varid'>sx</span> <span class='hs-varid'>sy</span> <span class='hs-varid'>sw</span> <span class='hs-varid'>sh</span><span class='hs-layout'>)</span> <span class='hs-varid'>n</span> <span class='hs-varid'>bias</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Rectangle</span> <span class='hs-varid'>sx</span> <span class='hs-layout'>(</span><span class='hs-varid'>sy</span><span class='hs-varop'>+</span><span class='hs-varid'>mh</span><span class='hs-layout'>)</span> <span class='hs-varid'>sw</span> <span class='hs-varid'>h</span>
<a name="line-101"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>mh</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>round</span> <span class='hs-varop'>$</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>sh</span><span class='hs-layout'>)</span><span class='hs-varop'>*</span><span class='hs-layout'>(</span><span class='hs-varid'>masterHeight</span> <span class='hs-varid'>n</span> <span class='hs-varid'>bias</span><span class='hs-layout'>)</span>
<a name="line-102"></a> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>round</span> <span class='hs-varop'>$</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>sh</span><span class='hs-layout'>)</span><span class='hs-varop'>*</span><span class='hs-layout'>(</span><span class='hs-num'>1</span><span class='hs-comment'>-</span><span class='hs-varid'>masterHeight</span> <span class='hs-varid'>n</span> <span class='hs-varid'>bias</span><span class='hs-layout'>)</span>
<a name="line-103"></a>
<a name="line-104"></a><a name="divideRow"></a><span class='hs-comment'>-- | Divide rectangle between windows</span>
<a name="line-105"></a><span class='hs-definition'>divideRow</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Rectangle</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-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Rectangle</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-106"></a><span class='hs-definition'>divideRow</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rectangle</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>ws</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>zip</span> <span class='hs-varid'>ws</span> <span class='hs-varid'>rects</span>
<a name="line-107"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>length</span> <span class='hs-varid'>ws</span>
<a name="line-108"></a> <span class='hs-varid'>oneW</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>w</span> <span class='hs-varop'>`div`</span> <span class='hs-varid'>n</span>
<a name="line-109"></a> <span class='hs-varid'>oneRect</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Rectangle</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>oneW</span><span class='hs-layout'>)</span> <span class='hs-varid'>h</span>
<a name="line-110"></a> <span class='hs-varid'>rects</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>take</span> <span class='hs-varid'>n</span> <span class='hs-varop'>$</span> <span class='hs-varid'>iterate</span> <span class='hs-layout'>(</span><span class='hs-varid'>shiftR</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>oneW</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>oneRect</span>
<a name="line-111"></a>
<a name="line-112"></a><a name="shiftR"></a><span class='hs-comment'>-- | Shift rectangle right</span>
<a name="line-113"></a><span class='hs-definition'>shiftR</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Position</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rectangle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rectangle</span>
<a name="line-114"></a><span class='hs-definition'>shiftR</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rectangle</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Rectangle</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-varop'>+</span><span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varid'>y</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span>
<a name="line-115"></a>
<a name="line-116"></a><a name="autoMaster"></a><span class='hs-comment'>-- | User interface function</span>
<a name="line-117"></a><span class='hs-definition'>autoMaster</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>LayoutClass</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span>
<a name="line-118"></a> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-comment'>-- Number of master windows</span>
<a name="line-119"></a> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-comment'>-- Step for which to increment/decrement master area size with Shrink/Expand</span>
<a name="line-120"></a> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span>
<a name="line-121"></a> <span class='hs-conid'>ModifiedLayout</span> <span class='hs-conid'>AutoMaster</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span>
<a name="line-122"></a><span class='hs-definition'>autoMaster</span> <span class='hs-varid'>nmaster</span> <span class='hs-varid'>delta</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ModifiedLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>AutoMaster</span> <span class='hs-varid'>nmaster</span> <span class='hs-num'>0</span> <span class='hs-varid'>delta</span><span class='hs-layout'>)</span>
<a name="line-123"></a>
</pre></body>
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