<?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/Actions/UpdatePointer.hs</title> <link type='text/css' rel='stylesheet' href='hscolour.css' /> </head> <body> <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 : XMonadContrib.UpdatePointer</span> <a name="line-4"></a><span class='hs-comment'>-- Copyright : (c) Robert Marlow <robreim@bobturf.org></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 : Robert Marlow <robreim@bobturf.org></span> <a name="line-8"></a><span class='hs-comment'>-- Stability : stable</span> <a name="line-9"></a><span class='hs-comment'>-- Portability : portable</span> <a name="line-10"></a><span class='hs-comment'>--</span> <a name="line-11"></a><span class='hs-comment'>-- Causes the pointer to follow whichever window focus changes to. Compliments</span> <a name="line-12"></a><span class='hs-comment'>-- the idea of switching focus as the mouse crosses window boundaries to</span> <a name="line-13"></a><span class='hs-comment'>-- keep the mouse near the currently focused window</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'>Actions</span><span class='hs-varop'>.</span><span class='hs-conid'>UpdatePointer</span> <a name="line-18"></a> <span class='hs-layout'>(</span> <a name="line-19"></a> <span class='hs-comment'>-- * Usage</span> <a name="line-20"></a> <span class='hs-comment'>-- $usage</span> <a name="line-21"></a> <span class='hs-varid'>updatePointer</span> <a name="line-22"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>PointerPosition</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> <a name="line-24"></a> <span class='hs-keyword'>where</span> <a name="line-25"></a> <a name="line-26"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span> <a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span> <a name="line-28"></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-layout'>(</span><span class='hs-varid'>member</span><span class='hs-layout'>,</span> <span class='hs-varid'>peek</span><span class='hs-layout'>,</span> <span class='hs-varid'>screenDetail</span><span class='hs-layout'>,</span> <span class='hs-varid'>current</span><span class='hs-layout'>)</span> <a name="line-29"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Maybe</span> <a name="line-30"></a> <a name="line-31"></a><span class='hs-comment'>-- $usage</span> <a name="line-32"></a><span class='hs-comment'>-- You can use this module with the following in your @~\/.xmonad\/xmonad.hs@:</span> <a name="line-33"></a><span class='hs-comment'>--</span> <a name="line-34"></a><span class='hs-comment'>-- > import XMonad</span> <a name="line-35"></a><span class='hs-comment'>-- > import XMonad.Actions.UpdatePointer</span> <a name="line-36"></a><span class='hs-comment'>--</span> <a name="line-37"></a><span class='hs-comment'>-- Enable it by including it in your logHook definition. Eg:</span> <a name="line-38"></a><span class='hs-comment'>--</span> <a name="line-39"></a><span class='hs-comment'>-- > logHook = updatePointer Nearest</span> <a name="line-40"></a><span class='hs-comment'>--</span> <a name="line-41"></a><span class='hs-comment'>-- which will move the pointer to the nearest point of a newly focused window, or</span> <a name="line-42"></a><span class='hs-comment'>--</span> <a name="line-43"></a><span class='hs-comment'>-- > logHook = updatePointer (Relative 0.5 0.5)</span> <a name="line-44"></a><span class='hs-comment'>--</span> <a name="line-45"></a><span class='hs-comment'>-- which will move the pointer to the center of a newly focused window.</span> <a name="line-46"></a><span class='hs-comment'>--</span> <a name="line-47"></a><span class='hs-comment'>-- To use this with an existing logHook, use >> :</span> <a name="line-48"></a><span class='hs-comment'>--</span> <a name="line-49"></a><span class='hs-comment'>-- > logHook = dynamicLog</span> <a name="line-50"></a><span class='hs-comment'>-- > >> updatePointer (Relative 1 1)</span> <a name="line-51"></a><span class='hs-comment'>--</span> <a name="line-52"></a><span class='hs-comment'>-- which moves the pointer to the bottom-right corner of the focused window.</span> <a name="line-53"></a> <a name="line-54"></a><a name="PointerPosition"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>PointerPosition</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nearest</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Relative</span> <span class='hs-conid'>Rational</span> <span class='hs-conid'>Rational</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>TowardsCentre</span> <span class='hs-conid'>Rational</span> <span class='hs-conid'>Rational</span> <a name="line-55"></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-56"></a> <a name="line-57"></a><a name="updatePointer"></a><span class='hs-comment'>-- | Update the pointer's location to the currently focused</span> <a name="line-58"></a><span class='hs-comment'>-- window or empty screen unless it's already there, or unless the user was changing</span> <a name="line-59"></a><span class='hs-comment'>-- focus with the mouse</span> <a name="line-60"></a><span class='hs-definition'>updatePointer</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PointerPosition</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-conid'>()</span> <a name="line-61"></a><span class='hs-definition'>updatePointer</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <a name="line-62"></a> <span class='hs-varid'>ws</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>gets</span> <span class='hs-varid'>windowset</span> <a name="line-63"></a> <span class='hs-varid'>dpy</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>asks</span> <span class='hs-varid'>display</span> <a name="line-64"></a> <span class='hs-varid'>rect</span> <span class='hs-keyglyph'><-</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>peek</span> <span class='hs-varid'>ws</span> <span class='hs-keyword'>of</span> <a name="line-65"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-layout'>(</span><span class='hs-varid'>screenRect</span> <span class='hs-varop'>.</span> <span class='hs-varid'>screenDetail</span> <span class='hs-varop'>.</span><span class='hs-varid'>current</span><span class='hs-layout'>)</span> <span class='hs-varid'>ws</span> <a name="line-66"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>windowAttributesToRectangle</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>io</span> <span class='hs-layout'>(</span><span class='hs-varid'>getWindowAttributes</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <a name="line-67"></a> <span class='hs-varid'>root</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>asks</span> <span class='hs-varid'>theRoot</span> <a name="line-68"></a> <span class='hs-varid'>mouseIsMoving</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>asks</span> <span class='hs-varid'>mouseFocused</span> <a name="line-69"></a> <span class='hs-layout'>(</span><span class='hs-sel'>_sameRoot</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-varid'>currentWindow</span><span class='hs-layout'>,</span><span class='hs-varid'>rootx</span><span class='hs-layout'>,</span><span class='hs-varid'>rooty</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-keyglyph'><-</span> <span class='hs-varid'>io</span> <span class='hs-varop'>$</span> <span class='hs-varid'>queryPointer</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>root</span> <a name="line-70"></a> <span class='hs-varid'>drag</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>gets</span> <span class='hs-varid'>dragging</span> <a name="line-71"></a> <span class='hs-varid'>unless</span> <span class='hs-layout'>(</span><span class='hs-varid'>pointWithin</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-varid'>rootx</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-varid'>rooty</span><span class='hs-layout'>)</span> <span class='hs-varid'>rect</span> <a name="line-72"></a> <span class='hs-varop'>||</span> <span class='hs-varid'>mouseIsMoving</span> <a name="line-73"></a> <span class='hs-varop'>||</span> <span class='hs-varid'>isJust</span> <span class='hs-varid'>drag</span> <a name="line-74"></a> <span class='hs-varop'>||</span> <span class='hs-varid'>not</span> <span class='hs-layout'>(</span><span class='hs-varid'>currentWindow</span> <span class='hs-varop'>`member`</span> <span class='hs-varid'>ws</span> <span class='hs-varop'>||</span> <span class='hs-varid'>currentWindow</span> <span class='hs-varop'>==</span> <span class='hs-varid'>none</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <a name="line-75"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>p</span> <span class='hs-keyword'>of</span> <a name="line-76"></a> <span class='hs-conid'>Nearest</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-77"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>moveWithin</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-varid'>rootx</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>rect_x</span> <span class='hs-varid'>rect</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-layout'>(</span><span class='hs-varid'>rect_x</span> <span class='hs-varid'>rect</span><span class='hs-layout'>)</span> <span class='hs-varop'>+</span> <span class='hs-varid'>fi</span> <span class='hs-layout'>(</span><span class='hs-varid'>rect_width</span> <span class='hs-varid'>rect</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-78"></a> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>moveWithin</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-varid'>rooty</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-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-layout'>(</span><span class='hs-varid'>rect_y</span> <span class='hs-varid'>rect</span><span class='hs-layout'>)</span> <span class='hs-varop'>+</span> <span class='hs-varid'>fi</span> <span class='hs-layout'>(</span><span class='hs-varid'>rect_height</span> <span class='hs-varid'>rect</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-79"></a> <span class='hs-varid'>io</span> <span class='hs-varop'>$</span> <span class='hs-varid'>warpPointer</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>none</span> <span class='hs-varid'>root</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <a name="line-80"></a> <span class='hs-conid'>TowardsCentre</span> <span class='hs-varid'>xfrc</span> <span class='hs-varid'>yfrc</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-81"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>cx</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fi</span> <span class='hs-layout'>(</span><span class='hs-varid'>rect_width</span> <span class='hs-varid'>rect</span><span class='hs-layout'>)</span> <span class='hs-varop'>/</span> <span class='hs-num'>2</span> <span class='hs-varop'>+</span> <span class='hs-varid'>fi</span> <span class='hs-layout'>(</span><span class='hs-varid'>rect_x</span> <span class='hs-varid'>rect</span><span class='hs-layout'>)</span> <a name="line-82"></a> <span class='hs-varid'>cy</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fi</span> <span class='hs-layout'>(</span><span class='hs-varid'>rect_height</span> <span class='hs-varid'>rect</span><span class='hs-layout'>)</span> <span class='hs-varop'>/</span> <span class='hs-num'>2</span> <span class='hs-varop'>+</span> <span class='hs-varid'>fi</span> <span class='hs-layout'>(</span><span class='hs-varid'>rect_y</span> <span class='hs-varid'>rect</span><span class='hs-layout'>)</span> <a name="line-83"></a> <span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-varid'>cx</span><span class='hs-layout'>,</span><span class='hs-varid'>cy</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Rational</span> <a name="line-84"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>moveWithin</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-varid'>rootx</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-varop'>$</span> <span class='hs-varid'>rect_x</span> <span class='hs-varid'>rect</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-layout'>(</span><span class='hs-varid'>rect_x</span> <span class='hs-varid'>rect</span><span class='hs-layout'>)</span> <span class='hs-varop'>+</span> <span class='hs-varid'>fi</span> <span class='hs-layout'>(</span><span class='hs-varid'>rect_width</span> <span class='hs-varid'>rect</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-85"></a> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>moveWithin</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-varid'>rooty</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-varop'>$</span> <span class='hs-varid'>rect_y</span> <span class='hs-varid'>rect</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-layout'>(</span><span class='hs-varid'>rect_y</span> <span class='hs-varid'>rect</span><span class='hs-layout'>)</span> <span class='hs-varop'>+</span> <span class='hs-varid'>fi</span> <span class='hs-layout'>(</span><span class='hs-varid'>rect_height</span> <span class='hs-varid'>rect</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-86"></a> <span class='hs-varid'>io</span> <span class='hs-varop'>$</span> <span class='hs-varid'>warpPointer</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>none</span> <span class='hs-varid'>root</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span> <span class='hs-layout'>(</span><span class='hs-varid'>round</span> <span class='hs-varop'>$</span> <span class='hs-varid'>x</span> <span class='hs-varop'>+</span> <span class='hs-varid'>xfrc</span><span class='hs-varop'>*</span><span class='hs-layout'>(</span><span class='hs-varid'>cx</span><span class='hs-comment'>-</span><span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>round</span> <span class='hs-varop'>$</span> <span class='hs-varid'>y</span> <span class='hs-varop'>+</span> <span class='hs-varid'>yfrc</span><span class='hs-varop'>*</span><span class='hs-layout'>(</span><span class='hs-varid'>cy</span><span class='hs-comment'>-</span><span class='hs-varid'>y</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-87"></a> <span class='hs-conid'>Relative</span> <span class='hs-varid'>h</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>-></span> <a name="line-88"></a> <span class='hs-varid'>io</span> <span class='hs-varop'>$</span> <span class='hs-varid'>warpPointer</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>none</span> <span class='hs-varid'>root</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span> <a name="line-89"></a> <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'>fraction</span> <span class='hs-varid'>h</span> <span class='hs-layout'>(</span><span class='hs-varid'>rect_width</span> <span class='hs-varid'>rect</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-90"></a> <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'>fraction</span> <span class='hs-varid'>v</span> <span class='hs-layout'>(</span><span class='hs-varid'>rect_height</span> <span class='hs-varid'>rect</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-91"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>fraction</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>floor</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-varop'>*</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <a name="line-92"></a> <a name="line-93"></a><a name="windowAttributesToRectangle"></a><span class='hs-definition'>windowAttributesToRectangle</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>WindowAttributes</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rectangle</span> <a name="line-94"></a><span class='hs-definition'>windowAttributesToRectangle</span> <span class='hs-varid'>wa</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Rectangle</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-layout'>(</span><span class='hs-varid'>wa_x</span> <span class='hs-varid'>wa</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-layout'>(</span><span class='hs-varid'>wa_y</span> <span class='hs-varid'>wa</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-95"></a> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-layout'>(</span><span class='hs-varid'>wa_width</span> <span class='hs-varid'>wa</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-layout'>(</span><span class='hs-varid'>wa_height</span> <span class='hs-varid'>wa</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-96"></a><a name="moveWithin"></a><span class='hs-definition'>moveWithin</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ord</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <a name="line-97"></a><span class='hs-definition'>moveWithin</span> <span class='hs-varid'>now</span> <span class='hs-varid'>lower</span> <span class='hs-varid'>upper</span> <span class='hs-keyglyph'>=</span> <a name="line-98"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>now</span> <span class='hs-varop'><</span> <span class='hs-varid'>lower</span> <a name="line-99"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>lower</span> <a name="line-100"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>now</span> <span class='hs-varop'>></span> <span class='hs-varid'>upper</span> <a name="line-101"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>upper</span> <a name="line-102"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>now</span> <a name="line-103"></a> <a name="line-104"></a><a name="fi"></a><span class='hs-definition'>fi</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Num</span> <span class='hs-varid'>b</span><span class='hs-layout'>,</span> <span class='hs-conid'>Integral</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <a name="line-105"></a><span class='hs-definition'>fi</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span> </pre></body> </html>
