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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE FlexibleInstances, 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.OnHost</span>
<a name="line-6"></a><span class='hs-comment'>-- Copyright : (c) Brandon S Allbery, Brent Yorgey</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 : <allbery.b@gmail.com></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'>-- Configure layouts on a per-host basis: use layouts and apply</span>
<a name="line-14"></a><span class='hs-comment'>-- layout modifiers selectively, depending on the host. Heavily based on</span>
<a name="line-15"></a><span class='hs-comment'>-- "XMonad.Layout.PerWorkspace" by Brent Yorgey.</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'>OnHost</span> <span class='hs-layout'>(</span><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-conid'>OnHost</span>
<a name="line-21"></a> <span class='hs-layout'>,</span><span class='hs-varid'>onHost</span>
<a name="line-22"></a> <span class='hs-layout'>,</span><span class='hs-varid'>onHosts</span>
<a name="line-23"></a> <span class='hs-layout'>,</span><span class='hs-varid'>modHost</span>
<a name="line-24"></a> <span class='hs-layout'>,</span><span class='hs-varid'>modHosts</span>
<a name="line-25"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-26"></a>
<a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span>
<a name="line-28"></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-29"></a>
<a name="line-30"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Layout</span><span class='hs-varop'>.</span><span class='hs-conid'>LayoutModifier</span>
<a name="line-31"></a>
<a name="line-32"></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-33"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Posix</span><span class='hs-varop'>.</span><span class='hs-conid'>Env</span> <span class='hs-layout'>(</span><span class='hs-varid'>getEnv</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 by importing it into your ~\/.xmonad\/xmonad.hs file:</span>
<a name="line-37"></a><span class='hs-comment'>--</span>
<a name="line-38"></a><span class='hs-comment'>-- > import XMonad.Layout.OnHost</span>
<a name="line-39"></a><span class='hs-comment'>--</span>
<a name="line-40"></a><span class='hs-comment'>-- and modifying your 'layoutHook' as follows (for example):</span>
<a name="line-41"></a><span class='hs-comment'>--</span>
<a name="line-42"></a><span class='hs-comment'>-- > layoutHook = modHost "baz" m1 $ -- apply layout modifier m1 to all layouts on host "baz"</span>
<a name="line-43"></a><span class='hs-comment'>-- > onHost "foo" l1 $ -- layout l1 will be used on host "foo".</span>
<a name="line-44"></a><span class='hs-comment'>-- > onHosts ["bar","quux"] l2 $ -- layout l2 will be used on hosts "bar" and "quux".</span>
<a name="line-45"></a><span class='hs-comment'>-- > l3 -- layout l3 will be used on all other hosts.</span>
<a name="line-46"></a><span class='hs-comment'>--</span>
<a name="line-47"></a><span class='hs-comment'>-- Note that @l1@, @l2@, and @l3@ can be arbitrarily complicated</span>
<a name="line-48"></a><span class='hs-comment'>-- layouts, e.g. @(Full ||| smartBorders $ tabbed shrinkText</span>
<a name="line-49"></a><span class='hs-comment'>-- defaultTConf ||| ...)@, and @m1@ can be any layout modifier, i.e. a</span>
<a name="line-50"></a><span class='hs-comment'>-- function of type @(l a -> ModifiedLayout lm l a)@.</span>
<a name="line-51"></a><span class='hs-comment'>--</span>
<a name="line-52"></a><span class='hs-comment'>-- In another scenario, suppose you wanted to have layouts A, B, and C</span>
<a name="line-53"></a><span class='hs-comment'>-- available on all hosts, except that on host foo you want</span>
<a name="line-54"></a><span class='hs-comment'>-- layout D instead of C. You could do that as follows:</span>
<a name="line-55"></a><span class='hs-comment'>--</span>
<a name="line-56"></a><span class='hs-comment'>-- > layoutHook = A ||| B ||| onHost "foo" D C</span>
<a name="line-57"></a><span class='hs-comment'>--</span>
<a name="line-58"></a><span class='hs-comment'>-- Note that we rely on '$HOST' being set in the environment, as is true on most</span>
<a name="line-59"></a><span class='hs-comment'>-- modern systems; if it's not, you may want to use a wrapper around xmonad or</span>
<a name="line-60"></a><span class='hs-comment'>-- perhaps use 'System.Posix.Env.setEnv' (or 'putEnv') to set it in 'main'.</span>
<a name="line-61"></a><span class='hs-comment'>-- This is to avoid dragging in the network package as an xmonad dependency.</span>
<a name="line-62"></a><span class='hs-comment'>-- If '$HOST' is not defined, it will behave as if the host name never matches.</span>
<a name="line-63"></a><span class='hs-comment'>--</span>
<a name="line-64"></a><span class='hs-comment'>-- Also note that '$HOST' is usually a fully qualified domain name, not a short name.</span>
<a name="line-65"></a><span class='hs-comment'>-- If you use a short name, this code will try to truncate $HOST to match; this may</span>
<a name="line-66"></a><span class='hs-comment'>-- prove too magical, though, and may change in the future.</span>
<a name="line-67"></a>
<a name="line-68"></a><a name="onHost"></a><span class='hs-comment'>-- | Specify one layout to use on a particular host, and another</span>
<a name="line-69"></a><span class='hs-comment'>-- to use on all others. The second layout can be another call to</span>
<a name="line-70"></a><span class='hs-comment'>-- 'onHost', and so on.</span>
<a name="line-71"></a><span class='hs-definition'>onHost</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>
<a name="line-72"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ the name of the host to match</span>
<a name="line-73"></a> <span class='hs-keyglyph'>-></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-comment'>-- ^ layout to use on the matched host</span>
<a name="line-74"></a> <span class='hs-keyglyph'>-></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-comment'>-- ^ layout to use everywhere else</span>
<a name="line-75"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>OnHost</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span>
<a name="line-76"></a><span class='hs-definition'>onHost</span> <span class='hs-varid'>host</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>onHosts</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>host</span><span class='hs-keyglyph'>]</span>
<a name="line-77"></a>
<a name="line-78"></a><a name="onHosts"></a><span class='hs-comment'>-- | Specify one layout to use on a particular set of hosts, and</span>
<a name="line-79"></a><span class='hs-comment'>-- another to use on all other hosts.</span>
<a name="line-80"></a><span class='hs-definition'>onHosts</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>
<a name="line-81"></a> <span class='hs-keyglyph'>=></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- ^ names of hosts to match</span>
<a name="line-82"></a> <span class='hs-keyglyph'>-></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-comment'>-- ^ layout to use on matched hosts</span>
<a name="line-83"></a> <span class='hs-keyglyph'>-></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-comment'>-- ^ layout to use everywhere else</span>
<a name="line-84"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>OnHost</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span>
<a name="line-85"></a><span class='hs-definition'>onHosts</span> <span class='hs-varid'>hosts</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>l2</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>OnHost</span> <span class='hs-varid'>hosts</span> <span class='hs-conid'>False</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>l2</span>
<a name="line-86"></a>
<a name="line-87"></a><a name="modHost"></a><span class='hs-comment'>-- | Specify a layout modifier to apply on a particular host; layouts</span>
<a name="line-88"></a><span class='hs-comment'>-- on all other hosts will remain unmodified.</span>
<a name="line-89"></a><span class='hs-definition'>modHost</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>LayoutClass</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-90"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ name of the host to match</span>
<a name="line-91"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ModifiedLayout</span> <span class='hs-varid'>lm</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ the modifier to apply on the matching host</span>
<a name="line-92"></a> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span> <span class='hs-comment'>-- ^ the base layout</span>
<a name="line-93"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>OnHost</span> <span class='hs-layout'>(</span><span class='hs-conid'>ModifiedLayout</span> <span class='hs-varid'>lm</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span>
<a name="line-94"></a><span class='hs-definition'>modHost</span> <span class='hs-varid'>host</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>modHosts</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>host</span><span class='hs-keyglyph'>]</span>
<a name="line-95"></a>
<a name="line-96"></a><a name="modHosts"></a><span class='hs-comment'>-- | Specify a layout modifier to apply on a particular set of</span>
<a name="line-97"></a><span class='hs-comment'>-- hosts; layouts on all other hosts will remain</span>
<a name="line-98"></a><span class='hs-comment'>-- unmodified.</span>
<a name="line-99"></a><span class='hs-definition'>modHosts</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>LayoutClass</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-100"></a> <span class='hs-keyglyph'>=></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- ^ names of the hosts to match</span>
<a name="line-101"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ModifiedLayout</span> <span class='hs-varid'>lm</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ the modifier to apply on the matching hosts</span>
<a name="line-102"></a> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span> <span class='hs-comment'>-- ^ the base layout</span>
<a name="line-103"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>OnHost</span> <span class='hs-layout'>(</span><span class='hs-conid'>ModifiedLayout</span> <span class='hs-varid'>lm</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span>
<a name="line-104"></a><span class='hs-definition'>modHosts</span> <span class='hs-varid'>hosts</span> <span class='hs-varid'>f</span> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>OnHost</span> <span class='hs-varid'>hosts</span> <span class='hs-conid'>False</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varid'>l</span>
<a name="line-105"></a>
<a name="line-106"></a><a name="OnHost"></a><span class='hs-comment'>-- | Structure for representing a host-specific layout along with</span>
<a name="line-107"></a><a name="OnHost"></a><span class='hs-comment'>-- a layout for all other hosts. We store the names of hosts</span>
<a name="line-108"></a><a name="OnHost"></a><span class='hs-comment'>-- to be matched, and the two layouts. We save the layout choice in</span>
<a name="line-109"></a><a name="OnHost"></a><span class='hs-comment'>-- the Bool, to be used to implement description.</span>
<a name="line-110"></a><a name="OnHost"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>OnHost</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'>OnHost</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span>
<a name="line-111"></a> <span class='hs-conid'>Bool</span>
<a name="line-112"></a> <span class='hs-layout'>(</span><span class='hs-varid'>l1</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-113"></a> <span class='hs-layout'>(</span><span class='hs-varid'>l2</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-114"></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-115"></a>
<a name="line-116"></a><a name="instance%20LayoutClass%20(OnHost%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'>Show</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>LayoutClass</span> <span class='hs-layout'>(</span><span class='hs-conid'>OnHost</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-117"></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-varid'>i</span> <span class='hs-varid'>p</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>OnHost</span> <span class='hs-varid'>hosts</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>lt</span> <span class='hs-varid'>lf</span><span class='hs-layout'>)</span> <span class='hs-varid'>ms</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-118"></a> <span class='hs-varid'>h</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>io</span> <span class='hs-varop'>$</span> <span class='hs-varid'>getEnv</span> <span class='hs-str'>"HOST"</span>
<a name="line-119"></a> <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'>`elemFQDN`</span> <span class='hs-varid'>hosts</span><span class='hs-layout'>)</span> <span class='hs-varid'>h</span>
<a name="line-120"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span> <span class='hs-layout'>(</span><span class='hs-varid'>wrs</span><span class='hs-layout'>,</span> <span class='hs-varid'>mlt'</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-varid'>i</span> <span class='hs-varid'>lt</span> <span class='hs-varid'>ms</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span>
<a name="line-121"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>wrs</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>mkNewOnHostT</span> <span class='hs-varid'>p</span> <span class='hs-varid'>mlt'</span><span class='hs-layout'>)</span>
<a name="line-122"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span> <span class='hs-layout'>(</span><span class='hs-varid'>wrs</span><span class='hs-layout'>,</span> <span class='hs-varid'>mlt'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>runLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Workspace</span> <span class='hs-varid'>i</span> <span class='hs-varid'>lf</span> <span class='hs-varid'>ms</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span>
<a name="line-123"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>wrs</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>mkNewOnHostF</span> <span class='hs-varid'>p</span> <span class='hs-varid'>mlt'</span><span class='hs-layout'>)</span>
<a name="line-124"></a>
<a name="line-125"></a> <span class='hs-varid'>handleMessage</span> <span class='hs-layout'>(</span><span class='hs-conid'>OnHost</span> <span class='hs-varid'>hosts</span> <span class='hs-varid'>bool</span> <span class='hs-varid'>lt</span> <span class='hs-varid'>lf</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span>
<a name="line-126"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>bool</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>lt</span> <span class='hs-varid'>m</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>nt</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>OnHost</span> <span class='hs-varid'>hosts</span> <span class='hs-varid'>bool</span> <span class='hs-varid'>nt</span> <span class='hs-varid'>lf</span><span class='hs-layout'>)</span>
<a name="line-127"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>handleMessage</span> <span class='hs-varid'>lf</span> <span class='hs-varid'>m</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>nf</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>OnHost</span> <span class='hs-varid'>hosts</span> <span class='hs-varid'>bool</span> <span class='hs-varid'>lt</span> <span class='hs-varid'>nf</span><span class='hs-layout'>)</span>
<a name="line-128"></a>
<a name="line-129"></a> <span class='hs-varid'>description</span> <span class='hs-layout'>(</span><span class='hs-conid'>OnHost</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>True</span> <span class='hs-varid'>l1</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>description</span> <span class='hs-varid'>l1</span>
<a name="line-130"></a> <span class='hs-varid'>description</span> <span class='hs-layout'>(</span><span class='hs-conid'>OnHost</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>l2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>description</span> <span class='hs-varid'>l2</span>
<a name="line-131"></a>
<a name="line-132"></a><a name="mkNewOnHostT"></a><span class='hs-comment'>-- | Construct new OnHost values with possibly modified layouts.</span>
<a name="line-133"></a><span class='hs-definition'>mkNewOnHostT</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>OnHost</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'>Maybe</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-keyglyph'>-></span> <span class='hs-conid'>OnHost</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span>
<a name="line-134"></a><span class='hs-definition'>mkNewOnHostT</span> <span class='hs-layout'>(</span><span class='hs-conid'>OnHost</span> <span class='hs-varid'>hosts</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>lt</span> <span class='hs-varid'>lf</span><span class='hs-layout'>)</span> <span class='hs-varid'>mlt'</span> <span class='hs-keyglyph'>=</span>
<a name="line-135"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>lt'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>OnHost</span> <span class='hs-varid'>hosts</span> <span class='hs-conid'>True</span> <span class='hs-varid'>lt'</span> <span class='hs-varid'>lf</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fromMaybe</span> <span class='hs-varid'>lt</span> <span class='hs-varid'>mlt'</span>
<a name="line-136"></a>
<a name="line-137"></a><a name="mkNewOnHostF"></a><span class='hs-definition'>mkNewOnHostF</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>OnHost</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>l2</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>OnHost</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>l2</span> <span class='hs-varid'>a</span>
<a name="line-138"></a><span class='hs-definition'>mkNewOnHostF</span> <span class='hs-layout'>(</span><span class='hs-conid'>OnHost</span> <span class='hs-varid'>hosts</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>lt</span> <span class='hs-varid'>lf</span><span class='hs-layout'>)</span> <span class='hs-varid'>mlf'</span> <span class='hs-keyglyph'>=</span>
<a name="line-139"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>lf'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>OnHost</span> <span class='hs-varid'>hosts</span> <span class='hs-conid'>False</span> <span class='hs-varid'>lt</span> <span class='hs-varid'>lf'</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fromMaybe</span> <span class='hs-varid'>lf</span> <span class='hs-varid'>mlf'</span>
<a name="line-140"></a>
<a name="line-141"></a><a name="elemFQDN"></a><span class='hs-comment'>-- | 'Data.List.elem' except that if one side has a dot and the other doesn't, we truncate</span>
<a name="line-142"></a><span class='hs-comment'>-- the one that does at the dot.</span>
<a name="line-143"></a><span class='hs-definition'>elemFQDN</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-144"></a><span class='hs-definition'>elemFQDN</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-145"></a><span class='hs-definition'>elemFQDN</span> <span class='hs-varid'>h0</span> <span class='hs-layout'>(</span><span class='hs-varid'>h</span><span class='hs-conop'>:</span><span class='hs-varid'>hs</span><span class='hs-layout'>)</span>
<a name="line-146"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>h0</span> <span class='hs-varop'>`eqFQDN`</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-147"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>elemFQDN</span> <span class='hs-varid'>h0</span> <span class='hs-varid'>hs</span>
<a name="line-148"></a>
<a name="line-149"></a><a name="eqFQDN"></a><span class='hs-comment'>-- | String equality, possibly truncating one side at a dot.</span>
<a name="line-150"></a><span class='hs-definition'>eqFQDN</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-151"></a><span class='hs-definition'>eqFQDN</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span>
<a name="line-152"></a> <span class='hs-keyglyph'>|</span> <span class='hs-chr'>'.'</span> <span class='hs-varop'>`elem`</span> <span class='hs-varid'>a</span> <span class='hs-varop'>&&</span> <span class='hs-chr'>'.'</span> <span class='hs-varop'>`elem`</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span> <span class='hs-varop'>==</span> <span class='hs-varid'>b</span>
<a name="line-153"></a> <span class='hs-keyglyph'>|</span> <span class='hs-chr'>'.'</span> <span class='hs-varop'>`elem`</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>takeWhile</span> <span class='hs-layout'>(</span><span class='hs-varop'>/=</span> <span class='hs-chr'>'.'</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-varop'>==</span> <span class='hs-varid'>b</span>
<a name="line-154"></a> <span class='hs-keyglyph'>|</span> <span class='hs-chr'>'.'</span> <span class='hs-varop'>`elem`</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</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-chr'>'.'</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span>
<a name="line-155"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span> <span class='hs-varop'>==</span> <span class='hs-varid'>b</span>
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