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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE FlexibleContexts, FlexibleInstances, MultiParamTypeClasses, UndecidableInstances, PatternGuards, DeriveDataTypeable #-}</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.LayoutBuilder</span>
<a name="line-5"></a><span class='hs-comment'>-- Copyright : (c) 2009 Anders Engstrom <ankaan@gmail.com></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 : Anders Engstrom <ankaan@gmail.com></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'>-- A layout combinator that sends a specified number of windows to one rectangle</span>
<a name="line-13"></a><span class='hs-comment'>-- and the rest to another.</span>
<a name="line-14"></a><span class='hs-comment'>--</span>
<a name="line-15"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-16"></a>
<a name="line-17"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Layout</span><span class='hs-varop'>.</span><span class='hs-conid'>LayoutBuilder</span> <span class='hs-layout'>(</span>
<a name="line-18"></a> <span class='hs-comment'>-- * Usage</span>
<a name="line-19"></a> <span class='hs-comment'>-- $usage</span>
<a name="line-20"></a> <span class='hs-varid'>layoutN</span><span class='hs-layout'>,</span>
<a name="line-21"></a> <span class='hs-varid'>layoutR</span><span class='hs-layout'>,</span>
<a name="line-22"></a> <span class='hs-varid'>layoutAll</span><span class='hs-layout'>,</span>
<a name="line-23"></a> <span class='hs-conid'>IncLayoutN</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-24"></a> <span class='hs-conid'>SubMeasure</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-25"></a> <span class='hs-conid'>SubBox</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-26"></a> <span class='hs-varid'>absBox</span><span class='hs-layout'>,</span>
<a name="line-27"></a> <span class='hs-varid'>relBox</span><span class='hs-layout'>,</span>
<a name="line-28"></a> <span class='hs-conid'>LayoutN</span><span class='hs-layout'>,</span>
<a name="line-29"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-30"></a>
<a name="line-31"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span>
<a name="line-32"></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-33"></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-34"></a>
<a name="line-35"></a><span class='hs-comment'>-- $usage</span>
<a name="line-36"></a><span class='hs-comment'>-- You can use this module with the following in your @~\/.xmonad\/xmonad.hs@:</span>
<a name="line-37"></a><span class='hs-comment'>--</span>
<a name="line-38"></a><span class='hs-comment'>-- > import XMonad.Layout.LayoutBuilder</span>
<a name="line-39"></a><span class='hs-comment'>--</span>
<a name="line-40"></a><span class='hs-comment'>-- Then edit your @layoutHook@ by adding something like:</span>
<a name="line-41"></a><span class='hs-comment'>--</span>
<a name="line-42"></a><span class='hs-comment'>-- > myLayout = ( (layoutN 1 (relBox 0 0 0.5 1) (Just $ relBox 0 0 1 1) $ simpleTabbed)</span>
<a name="line-43"></a><span class='hs-comment'>-- > $ (layoutAll (relBox 0.5 0 1 1) $ simpleTabbed)</span>
<a name="line-44"></a><span class='hs-comment'>-- > ) |||</span>
<a name="line-45"></a><span class='hs-comment'>-- > ( (layoutN 1 (relBox (1/3) 0 (1/2) 1) (Just $ relBox 0 0 1 1) $ Tall 0 0.01 0.5)</span>
<a name="line-46"></a><span class='hs-comment'>-- > $ (layoutR 0.1 0.5 (relBox (2/3) 0 1 1) Nothing $ Tall 0 0.01 0.5)</span>
<a name="line-47"></a><span class='hs-comment'>-- > $ (layoutAll (relBox 0 0 (1/3) 1) $ Tall 0 0.01 0.5)</span>
<a name="line-48"></a><span class='hs-comment'>-- > ) |||</span>
<a name="line-49"></a><span class='hs-comment'>-- > ( (layoutN 1 (absBox (-512-200) 0 512 0) (Just $ relBox 0 0 1 1) $ simpleTabbed)</span>
<a name="line-50"></a><span class='hs-comment'>-- > $ (layoutN 1 (absBox (-200) 0 0 0) Nothing $ simpleTabbed)</span>
<a name="line-51"></a><span class='hs-comment'>-- > $ (layoutAll (absBox 0 0 (-512-200) 0) $ simpleTabbed)</span>
<a name="line-52"></a><span class='hs-comment'>-- > ) ||| Full ||| etc...</span>
<a name="line-53"></a><span class='hs-comment'>-- > main = xmonad defaultConfig { layoutHook = myLayout }</span>
<a name="line-54"></a><span class='hs-comment'>--</span>
<a name="line-55"></a><span class='hs-comment'>-- This will produce a layout similar to DragPane, but with the possibility to have multiple windows in the left half</span>
<a name="line-56"></a><span class='hs-comment'>-- and tabs that show the available windows. It will also produce a layout similar to ThreeColMid and a special layout</span>
<a name="line-57"></a><span class='hs-comment'>-- created for use with a 80 columns wide Emacs window, its sidebar and a tabbed area for all other windows.</span>
<a name="line-58"></a><span class='hs-comment'>--</span>
<a name="line-59"></a><span class='hs-comment'>-- This module can be used to create many different custom layouts, but there are limitations. The primary limitation</span>
<a name="line-60"></a><span class='hs-comment'>-- can be observed in the second and third example when there are only two columns with windows in them. The leftmost</span>
<a name="line-61"></a><span class='hs-comment'>-- area is left blank. These blank areas can be avoided by placing the rectangles appropriately.</span>
<a name="line-62"></a><span class='hs-comment'>--</span>
<a name="line-63"></a><span class='hs-comment'>-- These examples require "XMonad.Layout.Tabbed".</span>
<a name="line-64"></a><span class='hs-comment'>--</span>
<a name="line-65"></a><span class='hs-comment'>-- For more detailed instructions on editing the layoutHook see:</span>
<a name="line-66"></a><span class='hs-comment'>--</span>
<a name="line-67"></a><span class='hs-comment'>-- "XMonad.Doc.Extending#Editing_the_layout_hook"</span>
<a name="line-68"></a><span class='hs-comment'>--</span>
<a name="line-69"></a><span class='hs-comment'>-- You may wish to add the following keybindings:</span>
<a name="line-70"></a><span class='hs-comment'>--</span>
<a name="line-71"></a><span class='hs-comment'>-- > , ((modm .|. shiftMask, xK_h ), sendMessage $ IncLayoutN (-1))</span>
<a name="line-72"></a><span class='hs-comment'>-- > , ((modm .|. shiftMask, xK_l ), sendMessage $ IncLayoutN 1)</span>
<a name="line-73"></a><span class='hs-comment'>--</span>
<a name="line-74"></a><span class='hs-comment'>-- For detailed instruction on editing the key binding see:</span>
<a name="line-75"></a><span class='hs-comment'>--</span>
<a name="line-76"></a><span class='hs-comment'>-- "XMonad.Doc.Extending#Editing_key_bindings".</span>
<a name="line-77"></a>
<a name="line-78"></a><a name="WindowNum"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>WindowNum</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Either</span> <span class='hs-conid'>Int</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rational</span><span class='hs-layout'>,</span><span class='hs-conid'>Rational</span><span class='hs-layout'>)</span>
<a name="line-79"></a>
<a name="line-80"></a><a name="LayoutN"></a><span class='hs-comment'>-- | Use one layout in the specified area for a number of windows and possibly let another layout handle the rest.</span>
<a name="line-81"></a><a name="LayoutN"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>LayoutN</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span>
<a name="line-82"></a> <span class='hs-conid'>LayoutN</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-conid'>WindowNum</span> <span class='hs-conid'>SubBox</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>SubBox</span><span class='hs-layout'>)</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-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>l2</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-83"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span><span class='hs-layout'>,</span><span class='hs-conid'>Read</span><span class='hs-layout'>)</span>
<a name="line-84"></a>
<a name="line-85"></a><a name="layoutN"></a><span class='hs-comment'>-- | Use the specified layout in the described area for N windows and send the rest of the windows to the next layout in the chain.</span>
<a name="line-86"></a><span class='hs-comment'>-- It is possible to supply an alternative area that will then be used instead, if there are no windows to send to the next layout.</span>
<a name="line-87"></a><span class='hs-definition'>layoutN</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'>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'>LayoutClass</span> <span class='hs-varid'>l3</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span>
<a name="line-88"></a> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ The number of windows to handle</span>
<a name="line-89"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SubBox</span> <span class='hs-comment'>-- ^ The box to place the windows in</span>
<a name="line-90"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>SubBox</span> <span class='hs-comment'>-- ^ Possibly an alternative box that is used when this layout handles all windows that are left</span>
<a name="line-91"></a> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>l1</span> <span class='hs-varid'>a</span> <span class='hs-comment'>-- ^ The layout to use in the specified area</span>
<a name="line-92"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>LayoutN</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>l3</span> <span class='hs-varid'>a</span> <span class='hs-comment'>-- ^ Where to send the remaining windows</span>
<a name="line-93"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>LayoutN</span> <span class='hs-varid'>l1</span> <span class='hs-layout'>(</span><span class='hs-conid'>LayoutN</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>l3</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-comment'>-- ^ The resulting layout</span>
<a name="line-94"></a><span class='hs-definition'>layoutN</span> <span class='hs-varid'>num</span> <span class='hs-varid'>box</span> <span class='hs-varid'>mbox</span> <span class='hs-varid'>sub</span> <span class='hs-varid'>next</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LayoutN</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>Nothing</span> <span class='hs-layout'>(</span><span class='hs-conid'>Left</span> <span class='hs-varid'>num</span><span class='hs-layout'>)</span> <span class='hs-varid'>box</span> <span class='hs-varid'>mbox</span> <span class='hs-varid'>sub</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>next</span><span class='hs-layout'>)</span>
<a name="line-95"></a>
<a name="line-96"></a><a name="layoutR"></a><span class='hs-comment'>-- | As layoutN, but the number of windows is given relative to the total number of windows remaining to be handled. The first</span>
<a name="line-97"></a><span class='hs-comment'>-- argument is how much to change the ratio when using IncLayoutN, and the second is the initial ratio.</span>
<a name="line-98"></a><span class='hs-definition'>layoutR</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'>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'>LayoutClass</span> <span class='hs-varid'>l3</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span>
<a name="line-99"></a> <span class='hs-conid'>Rational</span> <span class='hs-comment'>-- ^ How much to change the ratio with each IncLayoutN</span>
<a name="line-100"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rational</span> <span class='hs-comment'>-- ^ The ratio of the remaining windows to handle</span>
<a name="line-101"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SubBox</span> <span class='hs-comment'>-- ^ The box to place the windows in</span>
<a name="line-102"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>SubBox</span> <span class='hs-comment'>-- ^ Possibly an alternative box that is used when this layout handles all windows that are left</span>
<a name="line-103"></a> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>l1</span> <span class='hs-varid'>a</span> <span class='hs-comment'>-- ^ The layout to use in the specified area</span>
<a name="line-104"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>LayoutN</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>l3</span> <span class='hs-varid'>a</span> <span class='hs-comment'>-- ^ Where to send the remaining windows</span>
<a name="line-105"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>LayoutN</span> <span class='hs-varid'>l1</span> <span class='hs-layout'>(</span><span class='hs-conid'>LayoutN</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>l3</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-comment'>-- ^ The resulting layout</span>
<a name="line-106"></a><span class='hs-definition'>layoutR</span> <span class='hs-varid'>numdiff</span> <span class='hs-varid'>num</span> <span class='hs-varid'>box</span> <span class='hs-varid'>mbox</span> <span class='hs-varid'>sub</span> <span class='hs-varid'>next</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LayoutN</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>Nothing</span> <span class='hs-layout'>(</span><span class='hs-conid'>Right</span> <span class='hs-layout'>(</span><span class='hs-varid'>numdiff</span><span class='hs-layout'>,</span><span class='hs-varid'>num</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>box</span> <span class='hs-varid'>mbox</span> <span class='hs-varid'>sub</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>next</span><span class='hs-layout'>)</span>
<a name="line-107"></a>
<a name="line-108"></a><a name="layoutAll"></a><span class='hs-comment'>-- | Use the specified layout in the described area for all remaining windows.</span>
<a name="line-109"></a><span class='hs-definition'>layoutAll</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'>l1</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span>
<a name="line-110"></a> <span class='hs-conid'>SubBox</span> <span class='hs-comment'>-- ^ The box to place the windows in</span>
<a name="line-111"></a> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>l1</span> <span class='hs-varid'>a</span> <span class='hs-comment'>-- ^ The layout to use in the specified area</span>
<a name="line-112"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>LayoutN</span> <span class='hs-varid'>l1</span> <span class='hs-conid'>Full</span> <span class='hs-varid'>a</span> <span class='hs-comment'>-- ^ The resulting layout</span>
<a name="line-113"></a><span class='hs-definition'>layoutAll</span> <span class='hs-varid'>box</span> <span class='hs-varid'>sub</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LayoutN</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>Nothing</span> <span class='hs-layout'>(</span><span class='hs-conid'>Right</span> <span class='hs-layout'>(</span><span class='hs-num'>0</span><span class='hs-layout'>,</span><span class='hs-num'>1</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>box</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>sub</span> <span class='hs-conid'>Nothing</span>
<a name="line-114"></a>
<a name="line-115"></a><a name="IncLayoutN"></a><span class='hs-comment'>-- | Change the number of windows handled by the focused layout.</span>
<a name="line-116"></a><a name="IncLayoutN"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>IncLayoutN</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IncLayoutN</span> <span class='hs-conid'>Int</span> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Typeable</span>
<a name="line-117"></a><a name="instance%20LayoutClass%20(LayoutN%20l1%20l2)%20a"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Message</span> <span class='hs-conid'>IncLayoutN</span>
<a name="line-118"></a>
<a name="line-119"></a><a name="SubMeasure"></a><span class='hs-comment'>-- | The absolute or relative measures used to describe the area a layout should be placed in. For negative absolute values</span>
<a name="line-120"></a><a name="SubMeasure"></a><span class='hs-comment'>-- the total remaining space will be added. For sizes, the remaining space will also be added for zeroes. Relative values</span>
<a name="line-121"></a><a name="SubMeasure"></a><span class='hs-comment'>-- are applied on the remaining space after the top-left corner of the box have been removed.</span>
<a name="line-122"></a><a name="SubMeasure"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>SubMeasure</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Abs</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Rel</span> <span class='hs-conid'>Rational</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span><span class='hs-layout'>,</span><span class='hs-conid'>Read</span><span class='hs-layout'>)</span>
<a name="line-123"></a>
<a name="line-124"></a><a name="SubBox"></a><span class='hs-comment'>-- | A box to place a layout in. The stored values are xpos, ypos, width and height.</span>
<a name="line-125"></a><a name="SubBox"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>SubBox</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>SubBox</span> <span class='hs-conid'>SubMeasure</span> <span class='hs-conid'>SubMeasure</span> <span class='hs-conid'>SubMeasure</span> <span class='hs-conid'>SubMeasure</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span><span class='hs-layout'>,</span><span class='hs-conid'>Read</span><span class='hs-layout'>)</span>
<a name="line-126"></a>
<a name="line-127"></a>
<a name="line-128"></a><a name="absBox"></a><span class='hs-comment'>-- | Create a box with only absolute measurements. If the values are negative, the total remaining space will be added. For</span>
<a name="line-129"></a><span class='hs-comment'>-- sizes it will also be added for zeroes.</span>
<a name="line-130"></a><span class='hs-definition'>absBox</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ Absolute X-Position</span>
<a name="line-131"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ Absolute Y-Position</span>
<a name="line-132"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ Absolute width</span>
<a name="line-133"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ Absolute height</span>
<a name="line-134"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SubBox</span> <span class='hs-comment'>-- ^ The resulting 'SubBox' describing the area</span>
<a name="line-135"></a><span class='hs-definition'>absBox</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-keyglyph'>=</span> <span class='hs-conid'>SubBox</span> <span class='hs-layout'>(</span><span class='hs-conid'>Abs</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Abs</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Abs</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Abs</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span>
<a name="line-136"></a>
<a name="line-137"></a>
<a name="line-138"></a><a name="relBox"></a><span class='hs-comment'>-- | Create a box with only relative measurements.</span>
<a name="line-139"></a><span class='hs-definition'>relBox</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Rational</span> <span class='hs-comment'>-- ^ Relative X-Position with respect to the surrounding area</span>
<a name="line-140"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rational</span> <span class='hs-comment'>-- ^ Relative Y-Position with respect to the surrounding area</span>
<a name="line-141"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rational</span> <span class='hs-comment'>-- ^ Relative width with respect to the remaining width</span>
<a name="line-142"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rational</span> <span class='hs-comment'>-- ^ Relative height with respect to the remaining height</span>
<a name="line-143"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SubBox</span> <span class='hs-comment'>-- ^ The resulting 'SubBox' describing the area</span>
<a name="line-144"></a><span class='hs-definition'>relBox</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-keyglyph'>=</span> <span class='hs-conid'>SubBox</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rel</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rel</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rel</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rel</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span>
<a name="line-145"></a>
<a name="line-146"></a>
<a name="line-147"></a><a name="instance%20LayoutClass%20(LayoutN%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'>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> <span class='hs-keyglyph'>=></span>
<a name="line-148"></a> <span class='hs-conid'>LayoutClass</span> <span class='hs-layout'>(</span><span class='hs-conid'>LayoutN</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-149"></a>
<a name="line-150"></a> <span class='hs-comment'>-- | Update window locations.</span>
<a name="line-151"></a> <span class='hs-varid'>runLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Workspace</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>LayoutN</span> <span class='hs-varid'>subf</span> <span class='hs-varid'>nextf</span> <span class='hs-varid'>num</span> <span class='hs-varid'>box</span> <span class='hs-varid'>mbox</span> <span class='hs-varid'>sub</span> <span class='hs-varid'>next</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varid'>rect</span>
<a name="line-152"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>subs</span><span class='hs-layout'>,</span><span class='hs-varid'>nexts</span><span class='hs-layout'>,</span><span class='hs-varid'>subf'</span><span class='hs-layout'>,</span><span class='hs-varid'>nextf'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitStack</span> <span class='hs-varid'>s</span> <span class='hs-varid'>num</span> <span class='hs-varid'>subf</span> <span class='hs-varid'>nextf</span>
<a name="line-153"></a> <span class='hs-varid'>selBox</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>isJust</span> <span class='hs-varid'>nextf'</span>
<a name="line-154"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>box</span>
<a name="line-155"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>maybe</span> <span class='hs-varid'>box</span> <span class='hs-varid'>id</span> <span class='hs-varid'>mbox</span>
<a name="line-156"></a>
<a name="line-157"></a> <span class='hs-layout'>(</span><span class='hs-varid'>sublist</span><span class='hs-layout'>,</span><span class='hs-varid'>sub'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>handle</span> <span class='hs-varid'>sub</span> <span class='hs-varid'>subs</span> <span class='hs-varop'>$</span> <span class='hs-varid'>calcArea</span> <span class='hs-varid'>selBox</span> <span class='hs-varid'>rect</span>
<a name="line-158"></a>
<a name="line-159"></a> <span class='hs-layout'>(</span><span class='hs-varid'>nextlist</span><span class='hs-layout'>,</span><span class='hs-varid'>next'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>next</span> <span class='hs-keyword'>of</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>[]</span><span class='hs-layout'>,</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-160"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <span class='hs-layout'>(</span><span class='hs-varid'>res</span><span class='hs-layout'>,</span><span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>handle</span> <span class='hs-varid'>n</span> <span class='hs-varid'>nexts</span> <span class='hs-varid'>rect</span>
<a name="line-161"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>res</span><span class='hs-layout'>,</span><span class='hs-conid'>Just</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span>
<a name="line-162"></a>
<a name="line-163"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>sublist</span><span class='hs-varop'>++</span><span class='hs-varid'>nextlist</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>LayoutN</span> <span class='hs-varid'>subf'</span> <span class='hs-varid'>nextf'</span> <span class='hs-varid'>num</span> <span class='hs-varid'>box</span> <span class='hs-varid'>mbox</span> <span class='hs-varid'>sub'</span> <span class='hs-varid'>next'</span> <span class='hs-layout'>)</span>
<a name="line-164"></a> <span class='hs-keyword'>where</span>
<a name="line-165"></a> <span class='hs-varid'>handle</span> <span class='hs-varid'>l</span> <span class='hs-varid'>s'</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-layout'>(</span><span class='hs-varid'>res</span><span class='hs-layout'>,</span><span class='hs-varid'>ml</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>runLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Workspace</span> <span class='hs-str'>""</span> <span class='hs-varid'>l</span> <span class='hs-varid'>s'</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span>
<a name="line-166"></a> <span class='hs-varid'>l'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>maybe</span> <span class='hs-varid'>l</span> <span class='hs-varid'>id</span> <span class='hs-varid'>ml</span>
<a name="line-167"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>res</span><span class='hs-layout'>,</span><span class='hs-varid'>l'</span><span class='hs-layout'>)</span>
<a name="line-168"></a>
<a name="line-169"></a> <span class='hs-comment'>-- | Propagate messages.</span>
<a name="line-170"></a> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>l</span> <span class='hs-varid'>m</span>
<a name="line-171"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>IncLayoutN</span> <span class='hs-keyword'>_</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-keyglyph'>=</span> <span class='hs-varid'>windowNum</span> <span class='hs-varid'>l</span> <span class='hs-varid'>m</span>
<a name="line-172"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>IncMasterN</span> <span class='hs-keyword'>_</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-keyglyph'>=</span> <span class='hs-varid'>sendFocus</span> <span class='hs-varid'>l</span> <span class='hs-varid'>m</span>
<a name="line-173"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Shrink</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-keyglyph'>=</span> <span class='hs-varid'>sendFocus</span> <span class='hs-varid'>l</span> <span class='hs-varid'>m</span>
<a name="line-174"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Expand</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-keyglyph'>=</span> <span class='hs-varid'>sendFocus</span> <span class='hs-varid'>l</span> <span class='hs-varid'>m</span>
<a name="line-175"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sendBoth</span> <span class='hs-varid'>l</span> <span class='hs-varid'>m</span>
<a name="line-176"></a>
<a name="line-177"></a> <span class='hs-comment'>-- | Descriptive name for layout.</span>
<a name="line-178"></a> <span class='hs-varid'>description</span> <span class='hs-layout'>(</span><span class='hs-conid'>LayoutN</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>sub</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"layoutAll "</span><span class='hs-varop'>++</span> <span class='hs-varid'>description</span> <span class='hs-varid'>sub</span>
<a name="line-179"></a> <span class='hs-varid'>description</span> <span class='hs-layout'>(</span><span class='hs-conid'>LayoutN</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Left</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>sub</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>next</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"layoutN "</span><span class='hs-varop'>++</span> <span class='hs-varid'>description</span> <span class='hs-varid'>sub</span> <span class='hs-varop'>++</span><span class='hs-str'>" "</span><span class='hs-varop'>++</span> <span class='hs-varid'>description</span> <span class='hs-varid'>next</span>
<a name="line-180"></a> <span class='hs-varid'>description</span> <span class='hs-layout'>(</span><span class='hs-conid'>LayoutN</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Right</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>sub</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>next</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"layoutR "</span><span class='hs-varop'>++</span> <span class='hs-varid'>description</span> <span class='hs-varid'>sub</span> <span class='hs-varop'>++</span><span class='hs-str'>" "</span><span class='hs-varop'>++</span> <span class='hs-varid'>description</span> <span class='hs-varid'>next</span>
<a name="line-181"></a>
<a name="line-182"></a>
<a name="line-183"></a><a name="windowNum"></a><span class='hs-definition'>windowNum</span> <span class='hs-keyglyph'>::</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> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>LayoutN</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'>SomeMessage</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-layout'>(</span><span class='hs-conid'>LayoutN</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-184"></a><span class='hs-definition'>windowNum</span> <span class='hs-varid'>l</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>LayoutN</span> <span class='hs-varid'>subf</span> <span class='hs-varid'>nextf</span> <span class='hs-varid'>num</span> <span class='hs-varid'>box</span> <span class='hs-varid'>mbox</span> <span class='hs-varid'>subl</span> <span class='hs-varid'>nextl</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>|</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>IncLayoutN</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</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-keyglyph'>=</span>
<a name="line-185"></a> <span class='hs-keyword'>do</span> <span class='hs-varid'>foc</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>isFocus</span> <span class='hs-varid'>subf</span>
<a name="line-186"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>foc</span> <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>newnum</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>num</span> <span class='hs-keyword'>of</span>
<a name="line-187"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Left</span> <span class='hs-varid'>oldnum</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Left</span> <span class='hs-varop'>$</span> <span class='hs-varid'>max</span> <span class='hs-num'>1</span> <span class='hs-varop'>$</span> <span class='hs-varid'>oldnum</span> <span class='hs-varop'>+</span> <span class='hs-varid'>n</span>
<a name="line-188"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Right</span> <span class='hs-layout'>(</span><span class='hs-varid'>diff</span><span class='hs-layout'>,</span><span class='hs-varid'>oldnum</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Right</span> <span class='hs-layout'>(</span><span class='hs-varid'>diff</span><span class='hs-layout'>,</span> <span class='hs-varid'>min</span> <span class='hs-num'>1</span> <span class='hs-varop'>$</span> <span class='hs-varid'>max</span> <span class='hs-num'>0</span> <span class='hs-varop'>$</span> <span class='hs-varid'>oldnum</span> <span class='hs-varop'>+</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span><span class='hs-varop'>*</span><span class='hs-varid'>diff</span><span class='hs-layout'>)</span>
<a name="line-189"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>LayoutN</span> <span class='hs-varid'>subf</span> <span class='hs-varid'>nextf</span> <span class='hs-varid'>newnum</span> <span class='hs-varid'>box</span> <span class='hs-varid'>mbox</span> <span class='hs-varid'>subl</span> <span class='hs-varid'>nextl</span>
<a name="line-190"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>sendNext</span> <span class='hs-varid'>l</span> <span class='hs-varid'>m</span>
<a name="line-191"></a><span class='hs-definition'>windowNum</span> <span class='hs-varid'>l</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sendNext</span> <span class='hs-varid'>l</span> <span class='hs-varid'>m</span>
<a name="line-192"></a>
<a name="line-193"></a><a name="sendSub"></a><span class='hs-definition'>sendSub</span> <span class='hs-keyglyph'>::</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> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>LayoutN</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'>SomeMessage</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-layout'>(</span><span class='hs-conid'>LayoutN</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-194"></a><span class='hs-definition'>sendSub</span> <span class='hs-layout'>(</span><span class='hs-conid'>LayoutN</span> <span class='hs-varid'>subf</span> <span class='hs-varid'>nextf</span> <span class='hs-varid'>num</span> <span class='hs-varid'>box</span> <span class='hs-varid'>mbox</span> <span class='hs-varid'>sub</span> <span class='hs-varid'>next</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span>
<a name="line-195"></a> <span class='hs-keyword'>do</span> <span class='hs-varid'>sub'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>sub</span> <span class='hs-varid'>m</span>
<a name="line-196"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>isJust</span> <span class='hs-varid'>sub'</span>
<a name="line-197"></a> <span class='hs-keyword'>then</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>LayoutN</span> <span class='hs-varid'>subf</span> <span class='hs-varid'>nextf</span> <span class='hs-varid'>num</span> <span class='hs-varid'>box</span> <span class='hs-varid'>mbox</span> <span class='hs-layout'>(</span><span class='hs-varid'>maybe</span> <span class='hs-varid'>sub</span> <span class='hs-varid'>id</span> <span class='hs-varid'>sub'</span><span class='hs-layout'>)</span> <span class='hs-varid'>next</span>
<a name="line-198"></a> <span class='hs-keyword'>else</span> <span class='hs-conid'>Nothing</span>
<a name="line-199"></a>
<a name="line-200"></a><a name="sendBoth"></a><span class='hs-definition'>sendBoth</span> <span class='hs-keyglyph'>::</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> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>LayoutN</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'>SomeMessage</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-layout'>(</span><span class='hs-conid'>LayoutN</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-201"></a><span class='hs-definition'>sendBoth</span> <span class='hs-varid'>l</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>LayoutN</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sendSub</span> <span class='hs-varid'>l</span> <span class='hs-varid'>m</span>
<a name="line-202"></a><span class='hs-definition'>sendBoth</span> <span class='hs-layout'>(</span><span class='hs-conid'>LayoutN</span> <span class='hs-varid'>subf</span> <span class='hs-varid'>nextf</span> <span class='hs-varid'>num</span> <span class='hs-varid'>box</span> <span class='hs-varid'>mbox</span> <span class='hs-varid'>sub</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>next</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span>
<a name="line-203"></a> <span class='hs-keyword'>do</span> <span class='hs-varid'>sub'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>sub</span> <span class='hs-varid'>m</span>
<a name="line-204"></a> <span class='hs-varid'>next'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>next</span> <span class='hs-varid'>m</span>
<a name="line-205"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>isJust</span> <span class='hs-varid'>sub'</span> <span class='hs-varop'>||</span> <span class='hs-varid'>isJust</span> <span class='hs-varid'>next'</span>
<a name="line-206"></a> <span class='hs-keyword'>then</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>LayoutN</span> <span class='hs-varid'>subf</span> <span class='hs-varid'>nextf</span> <span class='hs-varid'>num</span> <span class='hs-varid'>box</span> <span class='hs-varid'>mbox</span> <span class='hs-layout'>(</span><span class='hs-varid'>maybe</span> <span class='hs-varid'>sub</span> <span class='hs-varid'>id</span> <span class='hs-varid'>sub'</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>maybe</span> <span class='hs-varid'>next</span> <span class='hs-varid'>id</span> <span class='hs-varid'>next'</span><span class='hs-layout'>)</span>
<a name="line-207"></a> <span class='hs-keyword'>else</span> <span class='hs-conid'>Nothing</span>
<a name="line-208"></a>
<a name="line-209"></a><a name="sendNext"></a><span class='hs-definition'>sendNext</span> <span class='hs-keyglyph'>::</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> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>LayoutN</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'>SomeMessage</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-layout'>(</span><span class='hs-conid'>LayoutN</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-210"></a><span class='hs-definition'>sendNext</span> <span class='hs-layout'>(</span><span class='hs-conid'>LayoutN</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-211"></a><span class='hs-definition'>sendNext</span> <span class='hs-layout'>(</span><span class='hs-conid'>LayoutN</span> <span class='hs-varid'>subf</span> <span class='hs-varid'>nextf</span> <span class='hs-varid'>num</span> <span class='hs-varid'>box</span> <span class='hs-varid'>mbox</span> <span class='hs-varid'>sub</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>next</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span>
<a name="line-212"></a> <span class='hs-keyword'>do</span> <span class='hs-varid'>next'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>next</span> <span class='hs-varid'>m</span>
<a name="line-213"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>isJust</span> <span class='hs-varid'>next'</span>
<a name="line-214"></a> <span class='hs-keyword'>then</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>LayoutN</span> <span class='hs-varid'>subf</span> <span class='hs-varid'>nextf</span> <span class='hs-varid'>num</span> <span class='hs-varid'>box</span> <span class='hs-varid'>mbox</span> <span class='hs-varid'>sub</span> <span class='hs-varid'>next'</span>
<a name="line-215"></a> <span class='hs-keyword'>else</span> <span class='hs-conid'>Nothing</span>
<a name="line-216"></a>
<a name="line-217"></a><a name="sendFocus"></a><span class='hs-definition'>sendFocus</span> <span class='hs-keyglyph'>::</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> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>LayoutN</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'>SomeMessage</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-layout'>(</span><span class='hs-conid'>LayoutN</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-218"></a><span class='hs-definition'>sendFocus</span> <span class='hs-varid'>l</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>LayoutN</span> <span class='hs-varid'>subf</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>foc</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>isFocus</span> <span class='hs-varid'>subf</span>
<a name="line-219"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>foc</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>sendSub</span> <span class='hs-varid'>l</span> <span class='hs-varid'>m</span>
<a name="line-220"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>sendNext</span> <span class='hs-varid'>l</span> <span class='hs-varid'>m</span>
<a name="line-221"></a>
<a name="line-222"></a><a name="isFocus"></a><span class='hs-definition'>isFocus</span> <span class='hs-keyglyph'>::</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-keyglyph'>=></span> <span class='hs-conid'>Maybe</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-conid'>Bool</span>
<a name="line-223"></a><span class='hs-definition'>isFocus</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>False</span>
<a name="line-224"></a><span class='hs-definition'>isFocus</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>ms</span> <span class='hs-keyglyph'><-</span> <span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>stack</span> <span class='hs-varop'>.</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>workspace</span> <span class='hs-varop'>.</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>current</span><span class='hs-layout'>)</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>gets</span> <span class='hs-varid'>windowset</span>
<a name="line-225"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>maybe</span> <span class='hs-conid'>False</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>show</span> <span class='hs-varid'>w</span> <span class='hs-varop'>==</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varop'>$</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>focus</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>ms</span>
<a name="line-226"></a>
<a name="line-227"></a>
<a name="line-228"></a><a name="calcNum"></a><span class='hs-definition'>calcNum</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>WindowNum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span>
<a name="line-229"></a><span class='hs-definition'>calcNum</span> <span class='hs-varid'>tot</span> <span class='hs-varid'>num</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>max</span> <span class='hs-num'>1</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>num</span> <span class='hs-keyword'>of</span> <span class='hs-conid'>Left</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>i</span>
<a name="line-230"></a> <span class='hs-conid'>Right</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>ceiling</span> <span class='hs-varop'>$</span> <span class='hs-varid'>r</span> <span class='hs-varop'>*</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>tot</span>
<a name="line-231"></a>
<a name="line-232"></a><a name="splitStack"></a><span class='hs-definition'>splitStack</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Eq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Stack</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>WindowNum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-varid'>a</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-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Stack</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Stack</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>Maybe</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-conid'>Maybe</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-233"></a><span class='hs-definition'>splitStack</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>,</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>,</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>,</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-234"></a><span class='hs-definition'>splitStack</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-varid'>num</span> <span class='hs-varid'>subf</span> <span class='hs-varid'>nextf</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span> <span class='hs-varid'>differentiate'</span> <span class='hs-varid'>subf'</span> <span class='hs-varid'>subl</span>
<a name="line-235"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>differentiate'</span> <span class='hs-varid'>nextf'</span> <span class='hs-varid'>nextl</span>
<a name="line-236"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>subf'</span>
<a name="line-237"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>nextf'</span>
<a name="line-238"></a> <span class='hs-layout'>)</span>
<a name="line-239"></a> <span class='hs-keyword'>where</span>
<a name="line-240"></a> <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'>s</span>
<a name="line-241"></a> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>calcNum</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span> <span class='hs-varid'>ws</span><span class='hs-layout'>)</span> <span class='hs-varid'>num</span>
<a name="line-242"></a> <span class='hs-varid'>subl</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>take</span> <span class='hs-varid'>n</span> <span class='hs-varid'>ws</span>
<a name="line-243"></a> <span class='hs-varid'>nextl</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>drop</span> <span class='hs-varid'>n</span> <span class='hs-varid'>ws</span>
<a name="line-244"></a> <span class='hs-varid'>subf'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foc</span> <span class='hs-varid'>subl</span> <span class='hs-varid'>subf</span>
<a name="line-245"></a> <span class='hs-varid'>nextf'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foc</span> <span class='hs-varid'>nextl</span> <span class='hs-varid'>nextf</span>
<a name="line-246"></a> <span class='hs-varid'>foc</span> <span class='hs-conid'>[]</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-247"></a> <span class='hs-varid'>foc</span> <span class='hs-varid'>l</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>focus</span> <span class='hs-varid'>s</span> <span class='hs-varop'>`elem`</span> <span class='hs-varid'>l</span>
<a name="line-248"></a> <span class='hs-keyword'>then</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>focus</span> <span class='hs-varid'>s</span>
<a name="line-249"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>maybe</span> <span class='hs-conid'>False</span> <span class='hs-layout'>(</span><span class='hs-varop'>`elem`</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varid'>f</span>
<a name="line-250"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>f</span>
<a name="line-251"></a> <span class='hs-keyword'>else</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>head</span> <span class='hs-varid'>l</span>
<a name="line-252"></a>
<a name="line-253"></a><a name="calcArea"></a><span class='hs-definition'>calcArea</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SubBox</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-254"></a><span class='hs-definition'>calcArea</span> <span class='hs-layout'>(</span><span class='hs-conid'>SubBox</span> <span class='hs-varid'>xpos</span> <span class='hs-varid'>ypos</span> <span class='hs-varid'>width</span> <span class='hs-varid'>height</span><span class='hs-layout'>)</span> <span class='hs-varid'>rect</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Rectangle</span> <span class='hs-layout'>(</span><span class='hs-varid'>rect_x</span> <span class='hs-varid'>rect</span> <span class='hs-varop'>+</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>xpos'</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>rect_y</span> <span class='hs-varid'>rect</span> <span class='hs-varop'>+</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>ypos'</span><span class='hs-layout'>)</span> <span class='hs-varid'>width'</span> <span class='hs-varid'>height'</span>
<a name="line-255"></a> <span class='hs-keyword'>where</span>
<a name="line-256"></a> <span class='hs-varid'>xpos'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>calc</span> <span class='hs-conid'>False</span> <span class='hs-varid'>xpos</span> <span class='hs-varop'>$</span> <span class='hs-varid'>rect_width</span> <span class='hs-varid'>rect</span>
<a name="line-257"></a> <span class='hs-varid'>ypos'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>calc</span> <span class='hs-conid'>False</span> <span class='hs-varid'>ypos</span> <span class='hs-varop'>$</span> <span class='hs-varid'>rect_height</span> <span class='hs-varid'>rect</span>
<a name="line-258"></a> <span class='hs-varid'>width'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>calc</span> <span class='hs-conid'>True</span> <span class='hs-varid'>width</span> <span class='hs-varop'>$</span> <span class='hs-varid'>rect_width</span> <span class='hs-varid'>rect</span> <span class='hs-comment'>-</span> <span class='hs-varid'>xpos'</span>
<a name="line-259"></a> <span class='hs-varid'>height'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>calc</span> <span class='hs-conid'>True</span> <span class='hs-varid'>height</span> <span class='hs-varop'>$</span> <span class='hs-varid'>rect_height</span> <span class='hs-varid'>rect</span> <span class='hs-comment'>-</span> <span class='hs-varid'>ypos'</span>
<a name="line-260"></a>
<a name="line-261"></a> <span class='hs-varid'>calc</span> <span class='hs-varid'>zneg</span> <span class='hs-varid'>val</span> <span class='hs-varid'>tot</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varop'>$</span> <span class='hs-varid'>min</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>tot</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>max</span> <span class='hs-num'>0</span> <span class='hs-varop'>$</span>
<a name="line-262"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>val</span> <span class='hs-keyword'>of</span> <span class='hs-conid'>Rel</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>floor</span> <span class='hs-varop'>$</span> <span class='hs-varid'>v</span> <span class='hs-varop'>*</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>tot</span>
<a name="line-263"></a> <span class='hs-conid'>Abs</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>if</span> <span class='hs-varid'>v</span><span class='hs-varop'><</span><span class='hs-num'>0</span> <span class='hs-varop'>||</span> <span class='hs-layout'>(</span><span class='hs-varid'>zneg</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>v</span><span class='hs-varop'>==</span><span class='hs-num'>0</span><span class='hs-layout'>)</span>
<a name="line-264"></a> <span class='hs-keyword'>then</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>tot</span><span class='hs-layout'>)</span><span class='hs-varop'>+</span><span class='hs-varid'>v</span>
<a name="line-265"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>v</span>
<a name="line-266"></a>
<a name="line-267"></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-conid'>Maybe</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-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Stack</span> <span class='hs-varid'>q</span><span class='hs-layout'>)</span>
<a name="line-268"></a><span class='hs-definition'>differentiate'</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-269"></a><span class='hs-definition'>differentiate'</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>w</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'>w</span>
<a name="line-270"></a><span class='hs-definition'>differentiate'</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>w</span>
<a name="line-271"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>f</span> <span class='hs-varop'>`elem`</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Stack</span> <span class='hs-layout'>{</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>focus</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span>
<a name="line-272"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>up</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>reverse</span> <span class='hs-varop'>$</span> <span class='hs-varid'>takeWhile</span> <span class='hs-layout'>(</span><span class='hs-varop'>/=</span><span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>w</span>
<a name="line-273"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>down</span> <span class='hs-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'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>w</span>
<a name="line-274"></a> <span class='hs-layout'>}</span>
<a name="line-275"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</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'>w</span>
</pre></body>
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