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<title>XMonad/Layout/HintedGrid.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE TypeSynonymInstances, MultiParamTypeClasses #-}</span>
<a name="line-2"></a>
<a name="line-3"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-4"></a><span class='hs-comment'>-- |</span>
<a name="line-5"></a><span class='hs-comment'>-- Module : XMonad.Layout.HintedGrid</span>
<a name="line-6"></a><span class='hs-comment'>-- Copyright : (c) Lukas Mai</span>
<a name="line-7"></a><span class='hs-comment'>-- License : BSD-style (see LICENSE)</span>
<a name="line-8"></a><span class='hs-comment'>--</span>
<a name="line-9"></a><span class='hs-comment'>-- Maintainer : <l.mai@web.de></span>
<a name="line-10"></a><span class='hs-comment'>-- Stability : unstable</span>
<a name="line-11"></a><span class='hs-comment'>-- Portability : unportable</span>
<a name="line-12"></a><span class='hs-comment'>--</span>
<a name="line-13"></a><span class='hs-comment'>-- A not so simple layout that attempts to put all windows in a square grid</span>
<a name="line-14"></a><span class='hs-comment'>-- while obeying their size hints.</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'>HintedGrid</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-conid'>Grid</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>arrange</span><span class='hs-layout'>,</span> <span class='hs-varid'>defaultRatio</span>
<a name="line-22"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-23"></a>
<a name="line-24"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Prelude</span> <span class='hs-varid'>hiding</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-25"></a>
<a name="line-26"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</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'>StackSet</span>
<a name="line-28"></a>
<a name="line-29"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>State</span>
<a name="line-30"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span>
<a name="line-31"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Ord</span>
<a name="line-32"></a>
<a name="line-33"></a><span class='hs-keyword'>infixr</span> <span class='hs-num'>9</span> <span class='hs-varop'>.</span>
<a name="line-34"></a><a name="."></a><span class='hs-layout'>(</span><span class='hs-varop'>.</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Functor</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span> <span class='hs-varid'>b</span>
<a name="line-35"></a><span class='hs-layout'>(</span><span class='hs-varop'>.</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span>
<a name="line-36"></a>
<a name="line-37"></a><span class='hs-comment'>-- $usage</span>
<a name="line-38"></a><span class='hs-comment'>-- You can use this module with the following in your @~\/.xmonad\/xmonad.hs@:</span>
<a name="line-39"></a><span class='hs-comment'>--</span>
<a name="line-40"></a><span class='hs-comment'>-- > import XMonad.Layout.HintedGrid</span>
<a name="line-41"></a><span class='hs-comment'>--</span>
<a name="line-42"></a><span class='hs-comment'>-- Then edit your @layoutHook@ by adding the 'Grid' layout:</span>
<a name="line-43"></a><span class='hs-comment'>--</span>
<a name="line-44"></a><span class='hs-comment'>-- > myLayout = Grid False ||| Full ||| etc..</span>
<a name="line-45"></a><span class='hs-comment'>-- > main = xmonad defaultConfig { layoutHook = myLayout }</span>
<a name="line-46"></a><span class='hs-comment'>--</span>
<a name="line-47"></a><span class='hs-comment'>-- You can also specify an aspect ratio for Grid to strive for with the</span>
<a name="line-48"></a><span class='hs-comment'>-- GridRatio constructor:</span>
<a name="line-49"></a><span class='hs-comment'>--</span>
<a name="line-50"></a><span class='hs-comment'>-- > myLayout = GridRatio (4/3) False ||| etc.</span>
<a name="line-51"></a><span class='hs-comment'>--</span>
<a name="line-52"></a><span class='hs-comment'>-- For more detailed instructions on editing the layoutHook see</span>
<a name="line-53"></a><span class='hs-comment'>-- "XMonad.Doc.Extending#Editing_the_layout_hook".</span>
<a name="line-54"></a>
<a name="line-55"></a><a name="Grid"></a><span class='hs-comment'>-- | Automatic mirroring of hinted layouts doesn't work very well, so this</span>
<a name="line-56"></a><a name="Grid"></a><span class='hs-comment'>-- 'Grid' comes with built-in mirroring. @Grid False@ is the normal layout,</span>
<a name="line-57"></a><a name="Grid"></a><span class='hs-comment'>-- @Grid True@ is the mirrored variant (rotated by 90 degrees).</span>
<a name="line-58"></a><a name="Grid"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Grid</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Grid</span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>GridRatio</span> <span class='hs-conid'>Double</span> <span class='hs-conid'>Bool</span> <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-59"></a>
<a name="line-60"></a><a name="defaultRatio"></a><span class='hs-definition'>defaultRatio</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Double</span>
<a name="line-61"></a><span class='hs-definition'>defaultRatio</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>16</span><span class='hs-varop'>/</span><span class='hs-num'>9</span>
<a name="line-62"></a>
<a name="line-63"></a><a name="instance%20LayoutClass%20Grid%20Window"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>LayoutClass</span> <span class='hs-conid'>Grid</span> <span class='hs-conid'>Window</span> <span class='hs-keyword'>where</span>
<a name="line-64"></a> <span class='hs-varid'>doLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>Grid</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>GridRatio</span> <span class='hs-varid'>defaultRatio</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span> <span class='hs-varid'>w</span>
<a name="line-65"></a> <span class='hs-varid'>doLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>GridRatio</span> <span class='hs-varid'>d</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>flip</span> <span class='hs-conid'>(,)</span> <span class='hs-conid'>Nothing</span> <span class='hs-varop'>.</span> <span class='hs-varid'>arrange</span> <span class='hs-varid'>d</span> <span class='hs-varid'>m</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-varid'>integrate</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span>
<a name="line-66"></a>
<a name="line-67"></a><a name="replicateS"></a><span class='hs-definition'>replicateS</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>b</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-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-varid'>b</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-68"></a><span class='hs-definition'>replicateS</span> <span class='hs-varid'>n</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>runState</span> <span class='hs-varop'>.</span> <span class='hs-varid'>replicateM</span> <span class='hs-varid'>n</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>gets</span> <span class='hs-varid'>f</span><span class='hs-layout'>;</span> <span class='hs-varid'>put</span> <span class='hs-varid'>s</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-varid'>a</span>
<a name="line-69"></a>
<a name="line-70"></a><a name="doColumn"></a><span class='hs-definition'>doColumn</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Dimension</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Dimension</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Dimension</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>D</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>D</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>D</span><span class='hs-keyglyph'>]</span>
<a name="line-71"></a><span class='hs-definition'>doColumn</span> <span class='hs-varid'>width</span> <span class='hs-varid'>height</span> <span class='hs-varid'>k</span> <span class='hs-varid'>adjs</span> <span class='hs-keyglyph'>=</span>
<a name="line-72"></a> <span class='hs-keyword'>let</span>
<a name="line-73"></a> <span class='hs-layout'>(</span><span class='hs-varid'>ind</span><span class='hs-layout'>,</span> <span class='hs-varid'>fs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unzip</span> <span class='hs-varop'>.</span> <span class='hs-varid'>sortBy</span> <span class='hs-layout'>(</span><span class='hs-varid'>comparing</span> <span class='hs-varop'>$</span> <span class='hs-varid'>snd</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-varop'>$</span> <span class='hs-layout'>(</span><span class='hs-varid'>width</span><span class='hs-layout'>,</span> <span class='hs-varid'>height</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>snd</span><span class='hs-layout'>)</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-conid'>Int</span> <span class='hs-keyglyph'>..</span><span class='hs-keyglyph'>]</span> <span class='hs-varop'>$</span> <span class='hs-varid'>adjs</span>
<a name="line-74"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-varid'>ds</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doC</span> <span class='hs-varid'>height</span> <span class='hs-varid'>k</span> <span class='hs-varid'>fs</span>
<a name="line-75"></a> <span class='hs-keyword'>in</span>
<a name="line-76"></a> <span class='hs-varid'>map</span> <span class='hs-varid'>snd</span> <span class='hs-varop'>.</span> <span class='hs-varid'>sortBy</span> <span class='hs-layout'>(</span><span class='hs-varid'>comparing</span> <span class='hs-varid'>fst</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>zip</span> <span class='hs-varid'>ind</span> <span class='hs-varop'>$</span> <span class='hs-varid'>ds</span>
<a name="line-77"></a> <span class='hs-keyword'>where</span>
<a name="line-78"></a> <span class='hs-varid'>doC</span> <span class='hs-varid'>h</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>h</span><span class='hs-layout'>,</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span>
<a name="line-79"></a> <span class='hs-varid'>doC</span> <span class='hs-varid'>h</span> <span class='hs-varid'>n</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-conop'>:</span> <span class='hs-varid'>fs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>adj</span> <span class='hs-conop'>:</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>doC</span> <span class='hs-layout'>(</span><span class='hs-varid'>h</span> <span class='hs-comment'>-</span> <span class='hs-varid'>h'</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span> <span class='hs-comment'>-</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>fs</span>
<a name="line-80"></a> <span class='hs-keyword'>where</span>
<a name="line-81"></a> <span class='hs-varid'>adj</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-varid'>h'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>width</span><span class='hs-layout'>,</span> <span class='hs-varid'>h</span> <span class='hs-varop'>`div`</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span>
<a name="line-82"></a>
<a name="line-83"></a><a name="doRect"></a><span class='hs-definition'>doRect</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Dimension</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Dimension</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Dimension</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>D</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>D</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Rectangle</span><span class='hs-keyglyph'>]</span>
<a name="line-84"></a><span class='hs-definition'>doRect</span> <span class='hs-varid'>height</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doR</span>
<a name="line-85"></a> <span class='hs-keyword'>where</span>
<a name="line-86"></a> <span class='hs-varid'>doR</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-87"></a> <span class='hs-varid'>doR</span> <span class='hs-varid'>width</span> <span class='hs-varid'>n</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span> <span class='hs-conop'>:</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-88"></a> <span class='hs-keyword'>let</span>
<a name="line-89"></a> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varop'>$</span> <span class='hs-varid'>length</span> <span class='hs-varid'>c</span>
<a name="line-90"></a> <span class='hs-varid'>c'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doColumn</span> <span class='hs-layout'>(</span><span class='hs-varid'>width</span> <span class='hs-varop'>`div`</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>height</span> <span class='hs-varid'>v</span> <span class='hs-varid'>c</span>
<a name="line-91"></a> <span class='hs-layout'>(</span><span class='hs-varid'>ws</span><span class='hs-layout'>,</span> <span class='hs-varid'>hs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unzip</span> <span class='hs-varid'>c'</span>
<a name="line-92"></a> <span class='hs-varid'>maxw</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>maximum</span> <span class='hs-varid'>ws</span>
<a name="line-93"></a> <span class='hs-varid'>height'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sum</span> <span class='hs-varid'>hs</span>
<a name="line-94"></a> <span class='hs-varid'>hbonus</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>height</span> <span class='hs-comment'>-</span> <span class='hs-varid'>height'</span>
<a name="line-95"></a> <span class='hs-varid'>hsingle</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hbonus</span> <span class='hs-varop'>`div`</span> <span class='hs-varid'>v</span>
<a name="line-96"></a> <span class='hs-varid'>hoffset</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hsingle</span> <span class='hs-varop'>`div`</span> <span class='hs-num'>2</span>
<a name="line-97"></a> <span class='hs-varid'>width'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>width</span> <span class='hs-comment'>-</span> <span class='hs-varid'>maxw</span>
<a name="line-98"></a> <span class='hs-varid'>ys</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>height</span> <span class='hs-comment'>-</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>subtract</span> <span class='hs-varid'>hoffset</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>scanl1</span> <span class='hs-layout'>(</span><span class='hs-varop'>+</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'>hsingle</span> <span class='hs-varop'>+</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>hs</span>
<a name="line-99"></a> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>width'</span> <span class='hs-varop'>+</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-varop'>`div`</span> <span class='hs-num'>2</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-varid'>maxw</span> <span class='hs-comment'>-</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>ws</span>
<a name="line-100"></a> <span class='hs-keyword'>in</span>
<a name="line-101"></a> <span class='hs-varid'>zipWith3</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</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'>fromIntegral</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>ys</span> <span class='hs-varid'>c'</span> <span class='hs-varop'>++</span> <span class='hs-varid'>doR</span> <span class='hs-varid'>width'</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span> <span class='hs-comment'>-</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>cs</span>
<a name="line-102"></a>
<a name="line-103"></a><a name="arrange"></a><span class='hs-comment'>-- | The internal function for computing the grid layout.</span>
<a name="line-104"></a><span class='hs-definition'>arrange</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Double</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</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-conid'>Window</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>Window</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-105"></a><span class='hs-definition'>arrange</span> <span class='hs-varid'>aspectRatio</span> <span class='hs-varid'>mirror</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rectangle</span> <span class='hs-varid'>rx</span> <span class='hs-varid'>ry</span> <span class='hs-varid'>rw</span> <span class='hs-varid'>rh</span><span class='hs-layout'>)</span> <span class='hs-varid'>wins</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-106"></a> <span class='hs-varid'>proto</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mapM</span> <span class='hs-varid'>mkAdjust</span> <span class='hs-varid'>wins</span>
<a name="line-107"></a> <span class='hs-keyword'>let</span>
<a name="line-108"></a> <span class='hs-varid'>adjs</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-varid'>f</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>twist</span> <span class='hs-varop'>.</span> <span class='hs-varid'>f</span> <span class='hs-varop'>.</span> <span class='hs-varid'>twist</span><span class='hs-layout'>)</span> <span class='hs-varid'>proto</span>
<a name="line-109"></a> <span class='hs-varid'>rs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>arrange'</span> <span class='hs-varid'>aspectRatio</span> <span class='hs-layout'>(</span><span class='hs-varid'>twist</span> <span class='hs-layout'>(</span><span class='hs-varid'>rw</span><span class='hs-layout'>,</span> <span class='hs-varid'>rh</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>adjs</span>
<a name="line-110"></a> <span class='hs-varid'>rs'</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'>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-varid'>uncurry</span> <span class='hs-layout'>(</span><span class='hs-varid'>uncurry</span> <span class='hs-conid'>Rectangle</span> <span class='hs-layout'>(</span><span class='hs-varid'>twist</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>twist</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>rs</span>
<a name="line-111"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>zip</span> <span class='hs-varid'>wins</span> <span class='hs-varop'>.</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>r</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>r</span><span class='hs-layout'>{</span> <span class='hs-varid'>rect_x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>rect_x</span> <span class='hs-varid'>r</span> <span class='hs-varop'>+</span> <span class='hs-varid'>rx</span><span class='hs-layout'>,</span> <span class='hs-varid'>rect_y</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>rect_y</span> <span class='hs-varid'>r</span> <span class='hs-varop'>+</span> <span class='hs-varid'>ry</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>rs'</span>
<a name="line-112"></a> <span class='hs-keyword'>where</span>
<a name="line-113"></a> <span class='hs-varid'>twist</span>
<a name="line-114"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>mirror</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-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-115"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>id</span>
<a name="line-116"></a>
<a name="line-117"></a><a name="arrange'"></a><span class='hs-definition'>arrange'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Double</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>D</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>D</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>D</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Rectangle</span><span class='hs-keyglyph'>]</span>
<a name="line-118"></a><span class='hs-definition'>arrange'</span> <span class='hs-varid'>aspectRatio</span> <span class='hs-layout'>(</span><span class='hs-varid'>rw</span><span class='hs-layout'>,</span> <span class='hs-varid'>rh</span><span class='hs-layout'>)</span> <span class='hs-varid'>adjs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>reverse</span> <span class='hs-varop'>$</span> <span class='hs-varid'>doRect</span> <span class='hs-varid'>rh</span> <span class='hs-varid'>rw</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>ncolumns</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>ecols</span> <span class='hs-varop'>++</span> <span class='hs-varid'>cols</span><span class='hs-layout'>)</span>
<a name="line-119"></a> <span class='hs-keyword'>where</span>
<a name="line-120"></a> <span class='hs-varid'>nwindows</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>length</span> <span class='hs-varid'>adjs</span>
<a name="line-121"></a> <span class='hs-varid'>ncolumns</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>max</span> <span class='hs-num'>1</span> <span class='hs-varop'>.</span> <span class='hs-varid'>round</span> <span class='hs-varop'>.</span> <span class='hs-varid'>sqrt</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>nwindows</span> <span class='hs-varop'>*</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>rw</span> <span class='hs-varop'>/</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>rh</span> <span class='hs-varop'>*</span> <span class='hs-varid'>aspectRatio</span><span class='hs-layout'>)</span>
<a name="line-122"></a> <span class='hs-varid'>nrows</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>nwindows</span> <span class='hs-varop'>`div`</span> <span class='hs-varid'>ncolumns</span>
<a name="line-123"></a> <span class='hs-varid'>nextras</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>nwindows</span> <span class='hs-comment'>-</span> <span class='hs-varid'>ncolumns</span> <span class='hs-varop'>*</span> <span class='hs-varid'>nrows</span>
<a name="line-124"></a> <span class='hs-layout'>(</span><span class='hs-varid'>ecols</span><span class='hs-layout'>,</span> <span class='hs-varid'>adjs'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>replicateS</span> <span class='hs-varid'>nextras</span> <span class='hs-layout'>(</span><span class='hs-varid'>splitAt</span> <span class='hs-layout'>(</span><span class='hs-varid'>nrows</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>reverse</span> <span class='hs-varid'>adjs</span>
<a name="line-125"></a> <span class='hs-layout'>(</span><span class='hs-varid'>cols</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'>replicateS</span> <span class='hs-layout'>(</span><span class='hs-varid'>ncolumns</span> <span class='hs-comment'>-</span> <span class='hs-varid'>nextras</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>splitAt</span> <span class='hs-varid'>nrows</span><span class='hs-layout'>)</span> <span class='hs-varid'>adjs'</span>
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