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<title>XMonad/Hooks/DebugStack.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-2"></a><span class='hs-comment'>-- |</span>
<a name="line-3"></a><span class='hs-comment'>-- Module : XMonad.Hooks.DebugStack</span>
<a name="line-4"></a><span class='hs-comment'>-- Copyright : (c) Brandon S Allbery KF8NH, 2012</span>
<a name="line-5"></a><span class='hs-comment'>-- License : BSD3-style (see LICENSE)</span>
<a name="line-6"></a><span class='hs-comment'>--</span>
<a name="line-7"></a><span class='hs-comment'>-- Maintainer : allbery.b@gmail.com</span>
<a name="line-8"></a><span class='hs-comment'>-- Stability : unstable</span>
<a name="line-9"></a><span class='hs-comment'>-- Portability : not portable</span>
<a name="line-10"></a><span class='hs-comment'>--</span>
<a name="line-11"></a><span class='hs-comment'>-- Dump the state of the 'StackSet'. A @logHook@ and @handleEventHook@ are</span>
<a name="line-12"></a><span class='hs-comment'>-- also provided.</span>
<a name="line-13"></a><span class='hs-comment'>--</span>
<a name="line-14"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-15"></a>
<a name="line-16"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Hooks</span><span class='hs-varop'>.</span><span class='hs-conid'>DebugStack</span> <span class='hs-layout'>(</span><span class='hs-varid'>debugStack</span>
<a name="line-17"></a> <span class='hs-layout'>,</span><span class='hs-varid'>debugStackString</span>
<a name="line-18"></a> <span class='hs-layout'>,</span><span class='hs-varid'>debugStackLogHook</span>
<a name="line-19"></a> <span class='hs-layout'>,</span><span class='hs-varid'>debugStackEventHook</span>
<a name="line-20"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-21"></a>
<a name="line-22"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Core</span>
<a name="line-23"></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-24"></a>
<a name="line-25"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Util</span><span class='hs-varop'>.</span><span class='hs-conid'>DebugWindow</span>
<a name="line-26"></a>
<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'>Types</span> <span class='hs-layout'>(</span><span class='hs-conid'>Window</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-conid'>Event</span><span class='hs-layout'>)</span>
<a name="line-29"></a>
<a name="line-30"></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'>foldM</span><span class='hs-layout'>)</span>
<a name="line-31"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Map</span> <span class='hs-layout'>(</span><span class='hs-varid'>toList</span><span class='hs-layout'>)</span>
<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'>Monoid</span> <span class='hs-layout'>(</span><span class='hs-conid'>All</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-33"></a>
<a name="line-34"></a><a name="debugStack"></a><span class='hs-comment'>-- | Print the state of the current window stack to @stderr@, which for most</span>
<a name="line-35"></a><span class='hs-comment'>-- installations goes to @~/.xsession-errors@. "XMonad.Util.DebugWindow"</span>
<a name="line-36"></a><span class='hs-comment'>-- is used to display the individual windows.</span>
<a name="line-37"></a><span class='hs-definition'>debugStack</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>X</span> <span class='hs-conid'>()</span>
<a name="line-38"></a><span class='hs-definition'>debugStack</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>debugStackString</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>trace</span>
<a name="line-39"></a>
<a name="line-40"></a><a name="debugStackLogHook"></a><span class='hs-comment'>-- | The above packaged as a 'logHook'. (Currently this is identical.)</span>
<a name="line-41"></a><span class='hs-definition'>debugStackLogHook</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>X</span> <span class='hs-conid'>()</span>
<a name="line-42"></a><span class='hs-definition'>debugStackLogHook</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>debugStack</span>
<a name="line-43"></a>
<a name="line-44"></a><span class='hs-comment'>-- | The above packaged as a 'handleEventHook'. You almost certainly do not</span>
<a name="line-45"></a><span class='hs-comment'>-- want to use this unconditionally, as it will cause massive amounts of</span>
<a name="line-46"></a><span class='hs-comment'>-- output and possibly slow @xmonad@ down severely.</span>
<a name="line-47"></a>
<a name="line-48"></a><a name="debugStackEventHook"></a><span class='hs-definition'>debugStackEventHook</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Event</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-conid'>All</span>
<a name="line-49"></a><span class='hs-definition'>debugStackEventHook</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>debugStack</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>All</span> <span class='hs-conid'>True</span><span class='hs-layout'>)</span>
<a name="line-50"></a>
<a name="line-51"></a><a name="debugStackString"></a><span class='hs-comment'>-- | Dump the state of the current 'StackSet' as a multiline 'String'.</span>
<a name="line-52"></a><span class='hs-comment'>-- @</span>
<a name="line-53"></a><span class='hs-comment'>-- stack [ mm</span>
<a name="line-54"></a><span class='hs-comment'>-- ,(*) ww</span>
<a name="line-55"></a><span class='hs-comment'>-- , ww</span>
<a name="line-56"></a><span class='hs-comment'>-- ]</span>
<a name="line-57"></a><span class='hs-comment'>-- float { ww</span>
<a name="line-58"></a><span class='hs-comment'>-- , ww</span>
<a name="line-59"></a><span class='hs-comment'>-- }</span>
<a name="line-60"></a><span class='hs-comment'>-- @</span>
<a name="line-61"></a><span class='hs-comment'>--</span>
<a name="line-62"></a><span class='hs-comment'>-- One thing I'm not sure of is where the zipper is when focus is on a</span>
<a name="line-63"></a><span class='hs-comment'>-- floating window.</span>
<a name="line-64"></a><span class='hs-definition'>debugStackString</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>X</span> <span class='hs-conid'>String</span>
<a name="line-65"></a><span class='hs-definition'>debugStackString</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withWindowSet</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>ws</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-66"></a> <span class='hs-varid'>s</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>emit</span> <span class='hs-str'>"stack"</span> <span class='hs-layout'>(</span><span class='hs-str'>"["</span><span class='hs-layout'>,</span><span class='hs-str'>"]"</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>peek</span> <span class='hs-varid'>ws</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>index</span> <span class='hs-varid'>ws</span>
<a name="line-67"></a> <span class='hs-varid'>f</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>emit</span> <span class='hs-str'>"float"</span> <span class='hs-layout'>(</span><span class='hs-str'>"{"</span><span class='hs-layout'>,</span><span class='hs-str'>"}"</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>peek</span> <span class='hs-varid'>ws</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-varid'>fst</span> <span class='hs-varop'>$</span> <span class='hs-varid'>toList</span> <span class='hs-varop'>$</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>floating</span> <span class='hs-varid'>ws</span>
<a name="line-68"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>s</span> <span class='hs-varop'>++</span> <span class='hs-varid'>f</span>
<a name="line-69"></a> <span class='hs-keyword'>where</span>
<a name="line-70"></a> <span class='hs-varid'>emit</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span><span class='hs-conid'>String</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Window</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Window</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-conid'>String</span>
<a name="line-71"></a> <span class='hs-varid'>emit</span> <span class='hs-varid'>title</span> <span class='hs-layout'>(</span><span class='hs-varid'>lb</span><span class='hs-layout'>,</span><span class='hs-varid'>rb</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>title</span> <span class='hs-varop'>++</span> <span class='hs-str'>" "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>lb</span> <span class='hs-varop'>++</span> <span class='hs-varid'>rb</span> <span class='hs-varop'>++</span> <span class='hs-str'>"]\n"</span>
<a name="line-72"></a> <span class='hs-varid'>emit</span> <span class='hs-varid'>title</span> <span class='hs-layout'>(</span><span class='hs-varid'>lb</span><span class='hs-layout'>,</span><span class='hs-varid'>rb</span><span class='hs-layout'>)</span> <span class='hs-varid'>focused</span> <span class='hs-varid'>ws</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-73"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-varid'>ss</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>foldM</span> <span class='hs-varid'>emit'</span> <span class='hs-layout'>(</span><span class='hs-varid'>title</span><span class='hs-layout'>,</span><span class='hs-varid'>lb</span><span class='hs-layout'>,</span><span class='hs-varid'>rb</span><span class='hs-layout'>,</span><span class='hs-varid'>focused</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>)</span> <span class='hs-varid'>ws</span>
<a name="line-74"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>ss</span> <span class='hs-varop'>++</span>
<a name="line-75"></a> <span class='hs-varid'>replicate</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span> <span class='hs-varid'>title</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-chr'>' '</span> <span class='hs-varop'>++</span>
<a name="line-76"></a> <span class='hs-varid'>rb</span> <span class='hs-varop'>++</span>
<a name="line-77"></a> <span class='hs-str'>"\n"</span>
<a name="line-78"></a>
<a name="line-79"></a> <span class='hs-varid'>emit'</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>Window</span><span class='hs-layout'>,</span><span class='hs-conid'>String</span><span class='hs-layout'>)</span>
<a name="line-80"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Window</span>
<a name="line-81"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-layout'>(</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>Window</span><span class='hs-layout'>,</span><span class='hs-conid'>String</span><span class='hs-layout'>)</span>
<a name="line-82"></a> <span class='hs-varid'>emit'</span> <span class='hs-layout'>(</span><span class='hs-varid'>t</span><span class='hs-layout'>,</span><span class='hs-varid'>l</span><span class='hs-layout'>,</span><span class='hs-varid'>r</span><span class='hs-layout'>,</span><span class='hs-varid'>f</span><span class='hs-layout'>,</span><span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-83"></a> <span class='hs-varid'>w'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>emit''</span> <span class='hs-varid'>f</span> <span class='hs-varid'>w</span>
<a name="line-84"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>replicate</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-chr'>' '</span>
<a name="line-85"></a> <span class='hs-layout'>,</span><span class='hs-chr'>','</span> <span class='hs-conop'>:</span> <span class='hs-varid'>replicate</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span> <span class='hs-varid'>l</span> <span class='hs-comment'>-</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-chr'>' '</span>
<a name="line-86"></a> <span class='hs-layout'>,</span><span class='hs-varid'>r</span>
<a name="line-87"></a> <span class='hs-layout'>,</span><span class='hs-varid'>f</span>
<a name="line-88"></a> <span class='hs-layout'>,</span><span class='hs-varid'>a</span> <span class='hs-varop'>++</span> <span class='hs-varid'>t</span> <span class='hs-varop'>++</span> <span class='hs-str'>" "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>l</span> <span class='hs-varop'>++</span> <span class='hs-varid'>w'</span> <span class='hs-varop'>++</span> <span class='hs-str'>"\n"</span>
<a name="line-89"></a> <span class='hs-layout'>)</span>
<a name="line-90"></a> <span class='hs-varid'>emit''</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Window</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'>String</span>
<a name="line-91"></a> <span class='hs-varid'>emit''</span> <span class='hs-varid'>focus</span> <span class='hs-varid'>win</span> <span class='hs-keyglyph'>=</span>
<a name="line-92"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>fi</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>win</span> <span class='hs-varop'>==</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>then</span> <span class='hs-str'>"(*) "</span> <span class='hs-keyword'>else</span> <span class='hs-str'>" "</span>
<a name="line-93"></a> <span class='hs-keyword'>in</span> <span class='hs-layout'>(</span><span class='hs-varid'>maybe</span> <span class='hs-str'>" "</span> <span class='hs-varid'>fi</span> <span class='hs-varid'>focus</span> <span class='hs-varop'>++</span><span class='hs-layout'>)</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>debugWindow</span> <span class='hs-varid'>win</span>
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