178 lines
23 KiB
HTML
178 lines
23 KiB
HTML
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<!-- Generated by HsColour, http://code.haskell.org/~malcolm/hscolour/ -->
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<title>src/HSFM/GUI/Gtk/Utils.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{--
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<a name="line-2"></a>HSFM, a filemanager written in Haskell.
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<a name="line-3"></a>Copyright (C) 2016 Julian Ospald
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<a name="line-4"></a>
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<a name="line-5"></a>This program is free software; you can redistribute it and/or
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<a name="line-6"></a>modify it under the terms of the GNU General Public License
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<a name="line-7"></a>version 2 as published by the Free Software Foundation.
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<a name="line-8"></a>
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<a name="line-9"></a>This program is distributed in the hope that it will be useful,
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<a name="line-10"></a>but WITHOUT ANY WARRANTY; without even the implied warranty of
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<a name="line-11"></a>MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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<a name="line-12"></a>GNU General Public License for more details.
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<a name="line-13"></a>
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<a name="line-14"></a>You should have received a copy of the GNU General Public License
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<a name="line-15"></a>along with this program; if not, write to the Free Software
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<a name="line-16"></a>Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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<a name="line-17"></a>--}</span>
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<a name="line-18"></a>
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<a name="line-19"></a><span class='hs-comment'>{-# OPTIONS_HADDOCK ignore-exports #-}</span>
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<a name="line-20"></a>
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<a name="line-21"></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'>Utils</span> <span class='hs-keyword'>where</span>
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<a name="line-22"></a>
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<a name="line-23"></a>
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<a name="line-24"></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'>MVar</span>
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<a name="line-25"></a> <span class='hs-layout'>(</span>
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<a name="line-26"></a> <span class='hs-varid'>readMVar</span>
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<a name="line-27"></a> <span class='hs-layout'>)</span>
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<a name="line-28"></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>
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<a name="line-29"></a> <span class='hs-layout'>(</span>
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<a name="line-30"></a> <span class='hs-varid'>readTVarIO</span>
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<a name="line-31"></a> <span class='hs-layout'>)</span>
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<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>
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<a name="line-33"></a> <span class='hs-layout'>(</span>
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<a name="line-34"></a> <span class='hs-varid'>catMaybes</span>
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<a name="line-35"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>fromJust</span>
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<a name="line-36"></a> <span class='hs-layout'>)</span>
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<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'>Traversable</span>
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<a name="line-38"></a> <span class='hs-layout'>(</span>
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<a name="line-39"></a> <span class='hs-varid'>forM</span>
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<a name="line-40"></a> <span class='hs-layout'>)</span>
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<a name="line-41"></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>
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<a name="line-42"></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>
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<a name="line-43"></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>
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<a name="line-44"></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'>getContents</span><span class='hs-layout'>)</span>
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<a name="line-45"></a>
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<a name="line-46"></a>
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<a name="line-47"></a>
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<a name="line-48"></a> <span class='hs-comment'>-----------------</span>
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<a name="line-49"></a> <span class='hs-comment'>--[ Utilities ]--</span>
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<a name="line-50"></a> <span class='hs-comment'>-----------------</span>
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<a name="line-51"></a>
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<a name="line-52"></a>
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<a name="line-53"></a><a name="getSelectedTreePaths"></a><span class='hs-definition'>getSelectedTreePaths</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MyGUI</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>MyView</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>TreePath</span><span class='hs-keyglyph'>]</span>
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<a name="line-54"></a><span class='hs-definition'>getSelectedTreePaths</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>myview</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
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<a name="line-55"></a> <span class='hs-varid'>view'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readTVarIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>view</span> <span class='hs-varid'>myview</span>
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<a name="line-56"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>view'</span> <span class='hs-keyword'>of</span>
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<a name="line-57"></a> <span class='hs-conid'>FMTreeView</span> <span class='hs-varid'>treeView</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
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<a name="line-58"></a> <span class='hs-varid'>tvs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>treeViewGetSelection</span> <span class='hs-varid'>treeView</span>
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<a name="line-59"></a> <span class='hs-varid'>treeSelectionGetSelectedRows</span> <span class='hs-varid'>tvs</span>
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<a name="line-60"></a> <span class='hs-conid'>FMIconView</span> <span class='hs-varid'>iconView</span> <span class='hs-keyglyph'>-></span>
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<a name="line-61"></a> <span class='hs-varid'>iconViewGetSelectedItems</span> <span class='hs-varid'>iconView</span>
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<a name="line-62"></a>
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<a name="line-63"></a>
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<a name="line-64"></a><a name="getSelectedItems"></a><span class='hs-comment'>-- |Gets the currently selected item of the treeView, if any.</span>
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<a name="line-65"></a><span class='hs-definition'>getSelectedItems</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MyGUI</span>
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<a name="line-66"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>MyView</span>
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<a name="line-67"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Item</span><span class='hs-keyglyph'>]</span>
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<a name="line-68"></a><span class='hs-definition'>getSelectedItems</span> <span class='hs-varid'>mygui</span> <span class='hs-varid'>myview</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
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<a name="line-69"></a> <span class='hs-varid'>tps</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getSelectedTreePaths</span> <span class='hs-varid'>mygui</span> <span class='hs-varid'>myview</span>
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<a name="line-70"></a> <span class='hs-varid'>catMaybes</span> <span class='hs-varop'><$></span> <span class='hs-varid'>mapM</span> <span class='hs-layout'>(</span><span class='hs-varid'>rawPathToItem</span> <span class='hs-varid'>myview</span><span class='hs-layout'>)</span> <span class='hs-varid'>tps</span>
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<a name="line-71"></a>
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<a name="line-72"></a>
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<a name="line-73"></a><a name="withItems"></a><span class='hs-comment'>-- |Carry out an action on the currently selected item.</span>
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<a name="line-74"></a><span class='hs-comment'>--</span>
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<a name="line-75"></a><span class='hs-comment'>-- If there is no item selected, does nothing.</span>
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<a name="line-76"></a><span class='hs-definition'>withItems</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MyGUI</span>
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<a name="line-77"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>MyView</span>
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<a name="line-78"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Item</span><span class='hs-keyglyph'>]</span>
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<a name="line-79"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>MyGUI</span>
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<a name="line-80"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>MyView</span>
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<a name="line-81"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ action to carry out</span>
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<a name="line-82"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
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<a name="line-83"></a><span class='hs-definition'>withItems</span> <span class='hs-varid'>mygui</span> <span class='hs-varid'>myview</span> <span class='hs-varid'>io</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
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<a name="line-84"></a> <span class='hs-varid'>items</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getSelectedItems</span> <span class='hs-varid'>mygui</span> <span class='hs-varid'>myview</span>
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<a name="line-85"></a> <span class='hs-varid'>io</span> <span class='hs-varid'>items</span> <span class='hs-varid'>mygui</span> <span class='hs-varid'>myview</span>
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<a name="line-86"></a>
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<a name="line-87"></a>
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<a name="line-88"></a><a name="fileListStore"></a><span class='hs-comment'>-- |Create the 'ListStore' of files/directories from the current directory.</span>
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<a name="line-89"></a><span class='hs-comment'>-- This is the function which maps the Data.DirTree data structures</span>
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<a name="line-90"></a><span class='hs-comment'>-- into the GTK+ data structures.</span>
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<a name="line-91"></a><span class='hs-definition'>fileListStore</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Item</span> <span class='hs-comment'>-- ^ current dir</span>
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<a name="line-92"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>MyView</span>
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<a name="line-93"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>ListStore</span> <span class='hs-conid'>Item</span><span class='hs-layout'>)</span>
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<a name="line-94"></a><span class='hs-definition'>fileListStore</span> <span class='hs-varid'>dt</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
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<a name="line-95"></a> <span class='hs-varid'>cs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getContents</span> <span class='hs-varid'>getFileInfo</span> <span class='hs-varid'>dt</span>
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<a name="line-96"></a> <span class='hs-varid'>listStoreNew</span> <span class='hs-varid'>cs</span>
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<a name="line-97"></a>
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<a name="line-98"></a>
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<a name="line-99"></a><a name="getFirstItem"></a><span class='hs-comment'>-- |Currently unsafe. This is used to obtain any item, which will</span>
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<a name="line-100"></a><span class='hs-comment'>-- fail if there is none.</span>
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<a name="line-101"></a><span class='hs-definition'>getFirstItem</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MyView</span>
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<a name="line-102"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Item</span>
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<a name="line-103"></a><span class='hs-definition'>getFirstItem</span> <span class='hs-varid'>myview</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
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<a name="line-104"></a> <span class='hs-varid'>rawModel'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readTVarIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>rawModel</span> <span class='hs-varid'>myview</span>
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<a name="line-105"></a> <span class='hs-varid'>iter</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromJust</span> <span class='hs-varop'><$></span> <span class='hs-varid'>treeModelGetIterFirst</span> <span class='hs-varid'>rawModel'</span>
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<a name="line-106"></a> <span class='hs-varid'>treeModelGetRow</span> <span class='hs-varid'>rawModel'</span> <span class='hs-varid'>iter</span>
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<a name="line-107"></a>
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<a name="line-108"></a>
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<a name="line-109"></a><a name="getCurrentDir"></a><span class='hs-comment'>-- |Reads the current directory from MyView.</span>
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<a name="line-110"></a><span class='hs-comment'>--</span>
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<a name="line-111"></a><span class='hs-comment'>-- This reads the MVar and may block the main thread if it's</span>
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<a name="line-112"></a><span class='hs-comment'>-- empty.</span>
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<a name="line-113"></a><span class='hs-definition'>getCurrentDir</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MyView</span>
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<a name="line-114"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Item</span>
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<a name="line-115"></a><span class='hs-definition'>getCurrentDir</span> <span class='hs-varid'>myview</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>readMVar</span> <span class='hs-layout'>(</span><span class='hs-varid'>cwd</span> <span class='hs-varid'>myview</span><span class='hs-layout'>)</span>
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<a name="line-116"></a>
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<a name="line-117"></a>
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<a name="line-118"></a><a name="pushStatusBar"></a><span class='hs-comment'>-- |Push a message to the status bar.</span>
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<a name="line-119"></a><span class='hs-definition'>pushStatusBar</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MyGUI</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>ContextId</span><span class='hs-layout'>,</span> <span class='hs-conid'>MessageId</span><span class='hs-layout'>)</span>
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<a name="line-120"></a><span class='hs-definition'>pushStatusBar</span> <span class='hs-varid'>mygui</span> <span class='hs-varid'>str</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
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<a name="line-121"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>sb</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>statusBar</span> <span class='hs-varid'>mygui</span>
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<a name="line-122"></a> <span class='hs-varid'>cid</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>statusbarGetContextId</span> <span class='hs-varid'>sb</span> <span class='hs-str'>"FM Status"</span>
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<a name="line-123"></a> <span class='hs-varid'>mid</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>statusbarPush</span> <span class='hs-varid'>sb</span> <span class='hs-varid'>cid</span> <span class='hs-varid'>str</span>
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<a name="line-124"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>cid</span><span class='hs-layout'>,</span> <span class='hs-varid'>mid</span><span class='hs-layout'>)</span>
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<a name="line-125"></a>
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<a name="line-126"></a>
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<a name="line-127"></a><a name="popStatusbar"></a><span class='hs-comment'>-- |Pop a message from the status bar.</span>
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<a name="line-128"></a><span class='hs-definition'>popStatusbar</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MyGUI</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
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<a name="line-129"></a><span class='hs-definition'>popStatusbar</span> <span class='hs-varid'>mygui</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
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<a name="line-130"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>sb</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>statusBar</span> <span class='hs-varid'>mygui</span>
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<a name="line-131"></a> <span class='hs-varid'>cid</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>statusbarGetContextId</span> <span class='hs-varid'>sb</span> <span class='hs-str'>"FM Status"</span>
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<a name="line-132"></a> <span class='hs-varid'>statusbarPop</span> <span class='hs-varid'>sb</span> <span class='hs-varid'>cid</span>
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<a name="line-133"></a>
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<a name="line-134"></a>
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<a name="line-135"></a><a name="rawPathToIter"></a><span class='hs-comment'>-- |Turn a path on the rawModel into a path that we can</span>
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<a name="line-136"></a><span class='hs-comment'>-- use at the outermost model layer.</span>
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<a name="line-137"></a><span class='hs-definition'>rawPathToIter</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MyView</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TreePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>TreeIter</span><span class='hs-layout'>)</span>
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<a name="line-138"></a><span class='hs-definition'>rawPathToIter</span> <span class='hs-varid'>myview</span> <span class='hs-varid'>tp</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
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<a name="line-139"></a> <span class='hs-varid'>fmodel</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readTVarIO</span> <span class='hs-layout'>(</span><span class='hs-varid'>filteredModel</span> <span class='hs-varid'>myview</span><span class='hs-layout'>)</span>
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<a name="line-140"></a> <span class='hs-varid'>smodel</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readTVarIO</span> <span class='hs-layout'>(</span><span class='hs-varid'>sortedModel</span> <span class='hs-varid'>myview</span><span class='hs-layout'>)</span>
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<a name="line-141"></a> <span class='hs-varid'>msiter</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>treeModelGetIter</span> <span class='hs-varid'>smodel</span> <span class='hs-varid'>tp</span>
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<a name="line-142"></a> <span class='hs-varid'>forM</span> <span class='hs-varid'>msiter</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>siter</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
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<a name="line-143"></a> <span class='hs-varid'>cIter</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>treeModelSortConvertIterToChildIter</span> <span class='hs-varid'>smodel</span> <span class='hs-varid'>siter</span>
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<a name="line-144"></a> <span class='hs-varid'>treeModelFilterConvertIterToChildIter</span> <span class='hs-varid'>fmodel</span> <span class='hs-varid'>cIter</span>
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<a name="line-145"></a>
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<a name="line-146"></a>
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<a name="line-147"></a><a name="rawPathToItem"></a><span class='hs-comment'>-- |Turn a path on the rawModel into the corresponding item</span>
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<a name="line-148"></a><span class='hs-comment'>-- that we can use at the outermost model layer.</span>
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<a name="line-149"></a><span class='hs-definition'>rawPathToItem</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MyView</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TreePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>Item</span><span class='hs-layout'>)</span>
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<a name="line-150"></a><span class='hs-definition'>rawPathToItem</span> <span class='hs-varid'>myview</span> <span class='hs-varid'>tp</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
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<a name="line-151"></a> <span class='hs-varid'>rawModel'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readTVarIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>rawModel</span> <span class='hs-varid'>myview</span>
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<a name="line-152"></a> <span class='hs-varid'>miter</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>rawPathToIter</span> <span class='hs-varid'>myview</span> <span class='hs-varid'>tp</span>
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<a name="line-153"></a> <span class='hs-varid'>forM</span> <span class='hs-varid'>miter</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>iter</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>treeModelGetRow</span> <span class='hs-varid'>rawModel'</span> <span class='hs-varid'>iter</span>
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<a name="line-154"></a>
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<a name="line-155"></a>
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<a name="line-156"></a><a name="addHistory"></a><span class='hs-comment'>-- |Makes sure the list is max 5. This is probably not very efficient</span>
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<a name="line-157"></a><span class='hs-comment'>-- but we don't care, since it's a small list anyway.</span>
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<a name="line-158"></a><span class='hs-definition'>addHistory</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Eq</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-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span>
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<a name="line-159"></a><span class='hs-definition'>addHistory</span> <span class='hs-varid'>i</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>i</span><span class='hs-keyglyph'>]</span>
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<a name="line-160"></a><span class='hs-definition'>addHistory</span> <span class='hs-varid'>i</span> <span class='hs-varid'>xs</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span>
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<a name="line-161"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>i</span> <span class='hs-varop'>==</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>xs</span>
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<a name="line-162"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>length</span> <span class='hs-varid'>xs</span> <span class='hs-varop'>==</span> <span class='hs-varid'>maxLength</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-conop'>:</span> <span class='hs-varid'>take</span> <span class='hs-layout'>(</span><span class='hs-varid'>maxLength</span> <span class='hs-comment'>-</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span>
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<a name="line-163"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-conop'>:</span> <span class='hs-varid'>xs</span>
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<a name="line-164"></a> <span class='hs-keyword'>where</span>
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<a name="line-165"></a> <span class='hs-varid'>maxLength</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>10</span>
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<a name="line-166"></a>
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</pre></body>
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</html>
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