<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<!-- Generated by HsColour, http://code.haskell.org/~malcolm/hscolour/ -->
<title>XMonad/Layout/FixedColumn.hs</title>
<link type='text/css' rel='stylesheet' href='hscolour.css' />
</head>
<body>
<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE FlexibleInstances, MultiParamTypeClasses, TypeSynonymInstances #-}</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.FixedColumn</span>
<a name="line-5"></a><span class='hs-comment'>-- Copyright : (c) 2008 Justin Bogner <mail@justinbogner.com></span>
<a name="line-6"></a><span class='hs-comment'>-- License : BSD3-style (as xmonad)</span>
<a name="line-7"></a><span class='hs-comment'>--</span>
<a name="line-8"></a><span class='hs-comment'>-- Maintainer : Justin Bogner <mail@justinbogner.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 much like Tall, but using a multiple of a window's minimum</span>
<a name="line-13"></a><span class='hs-comment'>-- resize amount instead of a percentage of screen to decide where to</span>
<a name="line-14"></a><span class='hs-comment'>-- split. This is useful when you usually leave a text editor or</span>
<a name="line-15"></a><span class='hs-comment'>-- terminal in the master pane and like it to be 80 columns wide.</span>
<a name="line-16"></a><span class='hs-comment'>--</span>
<a name="line-17"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-18"></a>
<a name="line-19"></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'>FixedColumn</span> <span class='hs-layout'>(</span>
<a name="line-20"></a> <span class='hs-comment'>-- * Usage</span>
<a name="line-21"></a> <span class='hs-comment'>-- $usage</span>
<a name="line-22"></a> <span class='hs-conid'>FixedColumn</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-23"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-24"></a>
<a name="line-25"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span> <span class='hs-layout'>(</span><span class='hs-varid'>msum</span><span class='hs-layout'>)</span>
<a name="line-26"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromMaybe</span><span class='hs-layout'>)</span>
<a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>X11</span><span class='hs-varop'>.</span><span class='hs-conid'>Xlib</span> <span class='hs-layout'>(</span><span class='hs-conid'>Window</span><span class='hs-layout'>,</span> <span class='hs-varid'>rect_width</span><span class='hs-layout'>)</span>
<a name="line-28"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>X11</span><span class='hs-varop'>.</span><span class='hs-conid'>Xlib</span><span class='hs-varop'>.</span><span class='hs-conid'>Extras</span> <span class='hs-layout'>(</span> <span class='hs-varid'>getWMNormalHints</span>
<a name="line-29"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>getWindowAttributes</span>
<a name="line-30"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>sh_base_size</span>
<a name="line-31"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>sh_resize_inc</span>
<a name="line-32"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>wa_border_width</span><span class='hs-layout'>)</span>
<a name="line-33"></a>
<a name="line-34"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Core</span> <span class='hs-layout'>(</span><span class='hs-conid'>X</span><span class='hs-layout'>,</span> <span class='hs-conid'>LayoutClass</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'>fromMessage</span><span class='hs-layout'>,</span> <span class='hs-varid'>io</span><span class='hs-layout'>,</span> <span class='hs-varid'>withDisplay</span><span class='hs-layout'>)</span>
<a name="line-35"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Layout</span> <span class='hs-layout'>(</span><span class='hs-conid'>Resize</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>IncMasterN</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'>tile</span><span class='hs-layout'>)</span>
<a name="line-36"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>StackSet</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>W</span>
<a name="line-37"></a>
<a name="line-38"></a><span class='hs-comment'>-- $usage</span>
<a name="line-39"></a><span class='hs-comment'>-- You can use this module with the following in your @~\/.xmonad\/xmonad.hs@:</span>
<a name="line-40"></a><span class='hs-comment'>--</span>
<a name="line-41"></a><span class='hs-comment'>-- > import XMonad.Layout.FixedColumn</span>
<a name="line-42"></a><span class='hs-comment'>--</span>
<a name="line-43"></a><span class='hs-comment'>-- Then edit your @layoutHook@ by adding the FixedColumn layout:</span>
<a name="line-44"></a><span class='hs-comment'>--</span>
<a name="line-45"></a><span class='hs-comment'>-- > myLayout = FixedColumn 1 20 80 10 ||| Full ||| etc..</span>
<a name="line-46"></a><span class='hs-comment'>-- > main = xmonad defaultConfig { layoutHook = myLayout }</span>
<a name="line-47"></a><span class='hs-comment'>--</span>
<a name="line-48"></a><span class='hs-comment'>-- For more detailed instructions on editing the layoutHook see:</span>
<a name="line-49"></a><span class='hs-comment'>--</span>
<a name="line-50"></a><span class='hs-comment'>-- "XMonad.Doc.Extending#Editing_the_layout_hook"</span>
<a name="line-51"></a>
<a name="line-52"></a><a name="FixedColumn"></a><span class='hs-comment'>-- | A tiling mode based on preserving a nice fixed width</span>
<a name="line-53"></a><a name="FixedColumn"></a><span class='hs-comment'>-- window. Supports 'Shrink', 'Expand' and 'IncMasterN'.</span>
<a name="line-54"></a><a name="FixedColumn"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>FixedColumn</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FixedColumn</span> <span class='hs-varop'>!</span><span class='hs-conid'>Int</span> <span class='hs-comment'>-- Number of windows in the master pane</span>
<a name="line-55"></a> <span class='hs-varop'>!</span><span class='hs-conid'>Int</span> <span class='hs-comment'>-- Number to increment by when resizing</span>
<a name="line-56"></a> <span class='hs-varop'>!</span><span class='hs-conid'>Int</span> <span class='hs-comment'>-- Default width of master pane</span>
<a name="line-57"></a> <span class='hs-varop'>!</span><span class='hs-conid'>Int</span> <span class='hs-comment'>-- Column width for normal windows</span>
<a name="line-58"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Read</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span><span class='hs-layout'>)</span>
<a name="line-59"></a>
<a name="line-60"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>LayoutClass</span> <span class='hs-conid'>FixedColumn</span> <span class='hs-conid'>Window</span> <span class='hs-keyword'>where</span>
<a name="line-61"></a> <span class='hs-varid'>doLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>FixedColumn</span> <span class='hs-varid'>nmaster</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>ncol</span> <span class='hs-varid'>fallback</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-62"></a> <span class='hs-varid'>fws</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mapM</span> <span class='hs-layout'>(</span><span class='hs-varid'>widthCols</span> <span class='hs-varid'>fallback</span> <span class='hs-varid'>ncol</span><span class='hs-layout'>)</span> <span class='hs-varid'>ws</span>
<a name="line-63"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>frac</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>maximum</span> <span class='hs-layout'>(</span><span class='hs-varid'>take</span> <span class='hs-varid'>nmaster</span> <span class='hs-varid'>fws</span><span class='hs-layout'>)</span> <span class='hs-varop'>//</span> <span class='hs-varid'>rect_width</span> <span class='hs-varid'>r</span>
<a name="line-64"></a> <span class='hs-varid'>rs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>tile</span> <span class='hs-varid'>frac</span> <span class='hs-varid'>r</span> <span class='hs-varid'>nmaster</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span> <span class='hs-varid'>ws</span><span class='hs-layout'>)</span>
<a name="line-65"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-layout'>(</span><span class='hs-varid'>zip</span> <span class='hs-varid'>ws</span> <span class='hs-varid'>rs</span><span class='hs-layout'>,</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-66"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>ws</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>integrate</span> <span class='hs-varid'>s</span>
<a name="line-67"></a> <span class='hs-varid'>x</span> <span class='hs-varop'>//</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>x</span> <span class='hs-varop'>/</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>y</span>
<a name="line-68"></a>
<a name="line-69"></a> <span class='hs-varid'>pureMessage</span> <span class='hs-layout'>(</span><span class='hs-conid'>FixedColumn</span> <span class='hs-varid'>nmaster</span> <span class='hs-varid'>delta</span> <span class='hs-varid'>ncol</span> <span class='hs-varid'>fallback</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span>
<a name="line-70"></a> <span class='hs-varid'>msum</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>resize</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromMessage</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-71"></a> <span class='hs-layout'>,</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>incmastern</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromMessage</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-72"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>resize</span> <span class='hs-conid'>Shrink</span>
<a name="line-73"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FixedColumn</span> <span class='hs-varid'>nmaster</span> <span class='hs-varid'>delta</span> <span class='hs-layout'>(</span><span class='hs-varid'>max</span> <span class='hs-num'>0</span> <span class='hs-varop'>$</span> <span class='hs-varid'>ncol</span> <span class='hs-comment'>-</span> <span class='hs-varid'>delta</span><span class='hs-layout'>)</span> <span class='hs-varid'>fallback</span>
<a name="line-74"></a> <span class='hs-varid'>resize</span> <span class='hs-conid'>Expand</span>
<a name="line-75"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FixedColumn</span> <span class='hs-varid'>nmaster</span> <span class='hs-varid'>delta</span> <span class='hs-layout'>(</span><span class='hs-varid'>ncol</span> <span class='hs-varop'>+</span> <span class='hs-varid'>delta</span><span class='hs-layout'>)</span> <span class='hs-varid'>fallback</span>
<a name="line-76"></a> <span class='hs-varid'>incmastern</span> <span class='hs-layout'>(</span><span class='hs-conid'>IncMasterN</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-77"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FixedColumn</span> <span class='hs-layout'>(</span><span class='hs-varid'>max</span> <span class='hs-num'>0</span> <span class='hs-layout'>(</span><span class='hs-varid'>nmaster</span><span class='hs-varop'>+</span><span class='hs-varid'>d</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>delta</span> <span class='hs-varid'>ncol</span> <span class='hs-varid'>fallback</span>
<a name="line-78"></a>
<a name="line-79"></a> <span class='hs-varid'>description</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"FixedColumn"</span>
<a name="line-80"></a>
<a name="line-81"></a><a name="widthCols"></a><span class='hs-comment'>-- | Determine the width of @w@ given that we would like it to be @n@</span>
<a name="line-82"></a><span class='hs-comment'>-- columns wide, using @inc@ as a resize increment for windows that</span>
<a name="line-83"></a><span class='hs-comment'>-- don't have one</span>
<a name="line-84"></a><span class='hs-definition'>widthCols</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Window</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-conid'>Int</span>
<a name="line-85"></a><span class='hs-definition'>widthCols</span> <span class='hs-varid'>inc</span> <span class='hs-varid'>n</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withDisplay</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>d</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>io</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-86"></a> <span class='hs-varid'>sh</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getWMNormalHints</span> <span class='hs-varid'>d</span> <span class='hs-varid'>w</span>
<a name="line-87"></a> <span class='hs-varid'>bw</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varop'>.</span> <span class='hs-varid'>wa_border_width</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>getWindowAttributes</span> <span class='hs-varid'>d</span> <span class='hs-varid'>w</span>
<a name="line-88"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>widthHint</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>sh</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fst</span>
<a name="line-89"></a> <span class='hs-varid'>oneCol</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromMaybe</span> <span class='hs-varid'>inc</span> <span class='hs-varop'>$</span> <span class='hs-varid'>widthHint</span> <span class='hs-varid'>sh_resize_inc</span>
<a name="line-90"></a> <span class='hs-varid'>base</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromMaybe</span> <span class='hs-num'>0</span> <span class='hs-varop'>$</span> <span class='hs-varid'>widthHint</span> <span class='hs-varid'>sh_base_size</span>
<a name="line-91"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-num'>2</span> <span class='hs-varop'>*</span> <span class='hs-varid'>bw</span> <span class='hs-varop'>+</span> <span class='hs-varid'>base</span> <span class='hs-varop'>+</span> <span class='hs-varid'>n</span> <span class='hs-varop'>*</span> <span class='hs-varid'>oneCol</span>
</pre></body>
</html>
