<?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>src/HSFM/GUI/Gtk/Callbacks/Utils.hs</title> <link type='text/css' rel='stylesheet' href='hscolour.css' /> </head> <body> <pre><a name="line-1"></a><span class='hs-comment'>{-- <a name="line-2"></a>HSFM, a filemanager written in Haskell. <a name="line-3"></a>Copyright (C) 2016 Julian Ospald <a name="line-4"></a> <a name="line-5"></a>This program is free software; you can redistribute it and/or <a name="line-6"></a>modify it under the terms of the GNU General Public License <a name="line-7"></a>version 2 as published by the Free Software Foundation. <a name="line-8"></a> <a name="line-9"></a>This program is distributed in the hope that it will be useful, <a name="line-10"></a>but WITHOUT ANY WARRANTY; without even the implied warranty of <a name="line-11"></a>MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the <a name="line-12"></a>GNU General Public License for more details. <a name="line-13"></a> <a name="line-14"></a>You should have received a copy of the GNU General Public License <a name="line-15"></a>along with this program; if not, write to the Free Software <a name="line-16"></a>Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. <a name="line-17"></a>--}</span> <a name="line-18"></a> <a name="line-19"></a><span class='hs-comment'>{-# LANGUAGE OverloadedStrings #-}</span> <a name="line-20"></a><span class='hs-comment'>{-# LANGUAGE ScopedTypeVariables #-}</span> <a name="line-21"></a><span class='hs-comment'>{-# OPTIONS_HADDOCK ignore-exports #-}</span> <a name="line-22"></a> <a name="line-23"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>HSFM</span><span class='hs-varop'>.</span><span class='hs-conid'>GUI</span><span class='hs-varop'>.</span><span class='hs-conid'>Gtk</span><span class='hs-varop'>.</span><span class='hs-conid'>Callbacks</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span> <span class='hs-keyword'>where</span> <a name="line-24"></a> <a name="line-25"></a> <a name="line-26"></a> <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-layout'>(</span> <a name="line-29"></a> <span class='hs-varid'>forM</span> <a name="line-30"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>forM_</span> <a name="line-31"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>when</span> <a name="line-32"></a> <span class='hs-layout'>)</span> <a name="line-33"></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-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Class</span> <a name="line-34"></a> <span class='hs-layout'>(</span> <a name="line-35"></a> <span class='hs-varid'>liftIO</span> <a name="line-36"></a> <span class='hs-layout'>)</span> <a name="line-37"></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-38"></a> <span class='hs-layout'>(</span> <a name="line-39"></a> <span class='hs-varid'>fromJust</span> <a name="line-40"></a> <span class='hs-layout'>)</span> <a name="line-41"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span> <a name="line-42"></a> <span class='hs-layout'>(</span> <a name="line-43"></a> <span class='hs-conid'>IOErrorType</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <a name="line-44"></a> <span class='hs-layout'>)</span> <a name="line-45"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>UI</span><span class='hs-varop'>.</span><span class='hs-conid'>Gtk</span> <a name="line-46"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>HPath</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>P</span> <a name="line-47"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>HPath</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span> <a name="line-48"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>HPath</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Errors</span> <a name="line-49"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>HSFM</span><span class='hs-varop'>.</span><span class='hs-conid'>FileSystem</span><span class='hs-varop'>.</span><span class='hs-conid'>FileType</span> <a name="line-50"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>HSFM</span><span class='hs-varop'>.</span><span class='hs-conid'>FileSystem</span><span class='hs-varop'>.</span><span class='hs-conid'>UtilTypes</span> <a name="line-51"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>HSFM</span><span class='hs-varop'>.</span><span class='hs-conid'>GUI</span><span class='hs-varop'>.</span><span class='hs-conid'>Gtk</span><span class='hs-varop'>.</span><span class='hs-conid'>Data</span> <a name="line-52"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>HSFM</span><span class='hs-varop'>.</span><span class='hs-conid'>GUI</span><span class='hs-varop'>.</span><span class='hs-conid'>Gtk</span><span class='hs-varop'>.</span><span class='hs-conid'>Dialogs</span> <a name="line-53"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>HSFM</span><span class='hs-varop'>.</span><span class='hs-conid'>GUI</span><span class='hs-varop'>.</span><span class='hs-conid'>Gtk</span><span class='hs-varop'>.</span><span class='hs-conid'>MyView</span> <a name="line-54"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>HSFM</span><span class='hs-varop'>.</span><span class='hs-conid'>GUI</span><span class='hs-varop'>.</span><span class='hs-conid'>Gtk</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span> <a name="line-55"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>HSFM</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span> <a name="line-56"></a> <span class='hs-layout'>(</span> <a name="line-57"></a> <span class='hs-varid'>modifyTVarIO</span> <a name="line-58"></a> <span class='hs-layout'>)</span> <a name="line-59"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Prelude</span> <span class='hs-varid'>hiding</span><span class='hs-layout'>(</span><span class='hs-varid'>readFile</span><span class='hs-layout'>)</span> <a name="line-60"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Concurrent</span><span class='hs-varop'>.</span><span class='hs-conid'>STM</span><span class='hs-varop'>.</span><span class='hs-conid'>TVar</span> <a name="line-61"></a> <span class='hs-layout'>(</span> <a name="line-62"></a> <span class='hs-varid'>readTVarIO</span> <a name="line-63"></a> <span class='hs-layout'>)</span> <a name="line-64"></a> <a name="line-65"></a> <a name="line-66"></a> <a name="line-67"></a> <a name="line-68"></a><a name="doFileOperation"></a><span class='hs-comment'>-- |Carries out a file operation with the appropriate error handling</span> <a name="line-69"></a><span class='hs-comment'>-- allowing the user to react to various exceptions with further input.</span> <a name="line-70"></a><span class='hs-definition'>doFileOperation</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FileOperation</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-71"></a><span class='hs-definition'>doFileOperation</span> <span class='hs-layout'>(</span><span class='hs-conid'>FCopy</span> <span class='hs-layout'>(</span><span class='hs-conid'>Copy</span> <span class='hs-layout'>(</span><span class='hs-varid'>f'</span><span class='hs-conop'>:</span><span class='hs-varid'>fs'</span><span class='hs-layout'>)</span> <span class='hs-varid'>to</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <a name="line-72"></a> <span class='hs-sel'>_doFileOperation</span> <span class='hs-layout'>(</span><span class='hs-varid'>f'</span><span class='hs-conop'>:</span><span class='hs-varid'>fs'</span><span class='hs-layout'>)</span> <span class='hs-varid'>to</span> <span class='hs-varid'>easyCopyOverwrite</span> <span class='hs-varid'>easyCopy</span> <a name="line-73"></a> <span class='hs-varop'>$</span> <span class='hs-varid'>doFileOperation</span> <span class='hs-layout'>(</span><span class='hs-conid'>FCopy</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Copy</span> <span class='hs-varid'>fs'</span> <span class='hs-varid'>to</span><span class='hs-layout'>)</span> <a name="line-74"></a><span class='hs-definition'>doFileOperation</span> <span class='hs-layout'>(</span><span class='hs-conid'>FMove</span> <span class='hs-layout'>(</span><span class='hs-conid'>Move</span> <span class='hs-layout'>(</span><span class='hs-varid'>f'</span><span class='hs-conop'>:</span><span class='hs-varid'>fs'</span><span class='hs-layout'>)</span> <span class='hs-varid'>to</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <a name="line-75"></a> <span class='hs-sel'>_doFileOperation</span> <span class='hs-layout'>(</span><span class='hs-varid'>f'</span><span class='hs-conop'>:</span><span class='hs-varid'>fs'</span><span class='hs-layout'>)</span> <span class='hs-varid'>to</span> <span class='hs-varid'>moveFileOverwrite</span> <span class='hs-varid'>moveFile</span> <a name="line-76"></a> <span class='hs-varop'>$</span> <span class='hs-varid'>doFileOperation</span> <span class='hs-layout'>(</span><span class='hs-conid'>FMove</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Move</span> <span class='hs-varid'>fs'</span> <span class='hs-varid'>to</span><span class='hs-layout'>)</span> <a name="line-77"></a><span class='hs-definition'>doFileOperation</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span> <a name="line-78"></a> <a name="line-79"></a> <a name="line-80"></a><span class='hs-sel'>_doFileOperation</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>P</span><span class='hs-varop'>.</span><span class='hs-conid'>Path</span> <span class='hs-varid'>b1</span><span class='hs-keyglyph'>]</span> <a name="line-81"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>P</span><span class='hs-varop'>.</span><span class='hs-conid'>Path</span> <span class='hs-conid'>P</span><span class='hs-varop'>.</span><span class='hs-conid'>Abs</span> <a name="line-82"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>P</span><span class='hs-varop'>.</span><span class='hs-conid'>Path</span> <span class='hs-varid'>b1</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>P</span><span class='hs-varop'>.</span><span class='hs-conid'>Path</span> <span class='hs-conid'>P</span><span class='hs-varop'>.</span><span class='hs-conid'>Abs</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <a name="line-83"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>P</span><span class='hs-varop'>.</span><span class='hs-conid'>Path</span> <span class='hs-varid'>b1</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>P</span><span class='hs-varop'>.</span><span class='hs-conid'>Path</span> <span class='hs-conid'>P</span><span class='hs-varop'>.</span><span class='hs-conid'>Abs</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <a name="line-84"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-85"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-86"></a><span class='hs-sel'>_doFileOperation</span> <span class='hs-conid'>[]</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span> <a name="line-87"></a><span class='hs-sel'>_doFileOperation</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span><span class='hs-conop'>:</span><span class='hs-varid'>fs</span><span class='hs-layout'>)</span> <span class='hs-varid'>to</span> <span class='hs-varid'>mcOverwrite</span> <span class='hs-varid'>mc</span> <span class='hs-varid'>rest</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <a name="line-88"></a> <span class='hs-varid'>toname</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>P</span><span class='hs-varop'>.</span><span class='hs-varid'>basename</span> <span class='hs-varid'>f</span> <a name="line-89"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>topath</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>to</span> <span class='hs-conid'>P</span><span class='hs-varop'>.</></span> <span class='hs-varid'>toname</span> <a name="line-90"></a> <span class='hs-varid'>reactOnError</span> <span class='hs-layout'>(</span><span class='hs-varid'>mc</span> <span class='hs-varid'>f</span> <span class='hs-varid'>topath</span> <span class='hs-varop'>>></span> <span class='hs-varid'>rest</span><span class='hs-layout'>)</span> <a name="line-91"></a> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>AlreadyExists</span> <span class='hs-layout'>,</span> <span class='hs-varid'>collisionAction</span> <span class='hs-varid'>fileCollisionDialog</span> <span class='hs-varid'>topath</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <a name="line-92"></a> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>FileDoesExist</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span><span class='hs-layout'>,</span> <span class='hs-varid'>collisionAction</span> <span class='hs-varid'>fileCollisionDialog</span> <span class='hs-varid'>topath</span><span class='hs-layout'>)</span> <a name="line-93"></a> <span class='hs-layout'>,</span><span class='hs-layout'>(</span><span class='hs-conid'>DirDoesExist</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-layout'>,</span> <span class='hs-varid'>collisionAction</span> <span class='hs-varid'>fileCollisionDialog</span> <span class='hs-varid'>topath</span><span class='hs-layout'>)</span> <a name="line-94"></a> <span class='hs-layout'>,</span><span class='hs-layout'>(</span><span class='hs-conid'>SameFile</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-layout'>,</span> <span class='hs-varid'>collisionAction</span> <span class='hs-varid'>renameDialog</span> <span class='hs-varid'>topath</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <a name="line-95"></a> <span class='hs-keyword'>where</span> <a name="line-96"></a> <span class='hs-varid'>collisionAction</span> <span class='hs-varid'>diag</span> <span class='hs-varid'>topath</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <a name="line-97"></a> <span class='hs-varid'>mcm</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>diag</span> <span class='hs-varop'>.</span> <span class='hs-conid'>P</span><span class='hs-varop'>.</span><span class='hs-varid'>fromAbs</span> <span class='hs-varop'>$</span> <span class='hs-varid'>topath</span> <a name="line-98"></a> <span class='hs-varid'>forM_</span> <span class='hs-varid'>mcm</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>cm</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>cm</span> <span class='hs-keyword'>of</span> <a name="line-99"></a> <span class='hs-conid'>Overwrite</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>mcOverwrite</span> <span class='hs-varid'>f</span> <span class='hs-varid'>topath</span> <span class='hs-varop'>>></span> <span class='hs-varid'>rest</span> <a name="line-100"></a> <span class='hs-conid'>OverwriteAll</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>forM_</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span><span class='hs-conop'>:</span><span class='hs-varid'>fs</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-101"></a> <span class='hs-varid'>toname'</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>P</span><span class='hs-varop'>.</span><span class='hs-varid'>basename</span> <span class='hs-varid'>x</span> <a name="line-102"></a> <span class='hs-varid'>mcOverwrite</span> <span class='hs-varid'>x</span> <span class='hs-layout'>(</span><span class='hs-varid'>to</span> <span class='hs-conid'>P</span><span class='hs-varop'>.</></span> <span class='hs-varid'>toname'</span><span class='hs-layout'>)</span> <a name="line-103"></a> <span class='hs-conid'>Skip</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>rest</span> <a name="line-104"></a> <span class='hs-conid'>Rename</span> <span class='hs-varid'>newn</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>mc</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>to</span> <span class='hs-conid'>P</span><span class='hs-varop'>.</></span> <span class='hs-varid'>newn</span><span class='hs-layout'>)</span> <span class='hs-varop'>>></span> <span class='hs-varid'>rest</span> <a name="line-105"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span> <a name="line-106"></a> <a name="line-107"></a> <a name="line-108"></a><a name="goDir"></a><span class='hs-comment'>-- |Helper that is invoked for any directory change operations.</span> <a name="line-109"></a><span class='hs-definition'>goDir</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span> <span class='hs-comment'>-- ^ whether to update the history</span> <a name="line-110"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>MyGUI</span> <a name="line-111"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>MyView</span> <a name="line-112"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Item</span> <a name="line-113"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-114"></a><span class='hs-definition'>goDir</span> <span class='hs-varid'>bhis</span> <span class='hs-varid'>mygui</span> <span class='hs-varid'>myview</span> <span class='hs-varid'>item</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <a name="line-115"></a> <span class='hs-varid'>cdir</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getCurrentDir</span> <span class='hs-varid'>myview</span> <a name="line-116"></a> <span class='hs-varid'>when</span> <span class='hs-varid'>bhis</span> <span class='hs-varop'>$</span> <span class='hs-varid'>modifyTVarIO</span> <span class='hs-layout'>(</span><span class='hs-varid'>history</span> <span class='hs-varid'>myview</span><span class='hs-layout'>)</span> <a name="line-117"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>p</span><span class='hs-layout'>,</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>path</span> <span class='hs-varid'>cdir</span> <span class='hs-varop'>`addHistory`</span> <span class='hs-varid'>p</span><span class='hs-layout'>,</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-118"></a> <span class='hs-varid'>refreshView'</span> <span class='hs-varid'>mygui</span> <span class='hs-varid'>myview</span> <span class='hs-varid'>item</span> <a name="line-119"></a> <a name="line-120"></a> <span class='hs-comment'>-- set notebook tab label</span> <a name="line-121"></a> <span class='hs-varid'>page</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>notebookGetCurrentPage</span> <span class='hs-layout'>(</span><span class='hs-varid'>notebook</span> <span class='hs-varid'>mygui</span><span class='hs-layout'>)</span> <a name="line-122"></a> <span class='hs-varid'>child</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromJust</span> <span class='hs-varop'><$></span> <span class='hs-varid'>notebookGetNthPage</span> <span class='hs-layout'>(</span><span class='hs-varid'>notebook</span> <span class='hs-varid'>mygui</span><span class='hs-layout'>)</span> <span class='hs-varid'>page</span> <a name="line-123"></a> <span class='hs-varid'>notebookSetTabLabelText</span> <span class='hs-layout'>(</span><span class='hs-varid'>notebook</span> <span class='hs-varid'>mygui</span><span class='hs-layout'>)</span> <span class='hs-varid'>child</span> <a name="line-124"></a> <span class='hs-layout'>(</span><span class='hs-varid'>maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>P</span><span class='hs-varop'>.</span><span class='hs-varid'>fromAbs</span> <span class='hs-varop'>$</span> <span class='hs-varid'>path</span> <span class='hs-varid'>item</span><span class='hs-layout'>)</span> <span class='hs-conid'>P</span><span class='hs-varop'>.</span><span class='hs-varid'>fromRel</span> <span class='hs-varop'>$</span> <span class='hs-conid'>P</span><span class='hs-varop'>.</span><span class='hs-varid'>basename</span> <span class='hs-varop'>.</span> <span class='hs-varid'>path</span> <span class='hs-varop'>$</span> <span class='hs-varid'>item</span><span class='hs-layout'>)</span> <a name="line-125"></a> </pre></body> </html>