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<title>src/Haddock/Backends/Xhtml/Themes.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 : Haddock.Backends.Html.Themes</span>
<a name="line-4"></a><span class='hs-comment'>-- Copyright : (c) Mark Lentczner 2010</span>
<a name="line-5"></a><span class='hs-comment'>-- License : BSD-like</span>
<a name="line-6"></a><span class='hs-comment'>--</span>
<a name="line-7"></a><span class='hs-comment'>-- Maintainer : haddock@projects.haskell.org</span>
<a name="line-8"></a><span class='hs-comment'>-- Stability : experimental</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-keyword'>module</span> <span class='hs-conid'>Haddock</span><span class='hs-varop'>.</span><span class='hs-conid'>Backends</span><span class='hs-varop'>.</span><span class='hs-conid'>Xhtml</span><span class='hs-varop'>.</span><span class='hs-conid'>Themes</span> <span class='hs-layout'>(</span>
<a name="line-12"></a> <span class='hs-conid'>Themes</span><span class='hs-layout'>,</span>
<a name="line-13"></a> <span class='hs-varid'>getThemes</span><span class='hs-layout'>,</span>
<a name="line-14"></a>
<a name="line-15"></a> <span class='hs-varid'>cssFiles</span><span class='hs-layout'>,</span> <span class='hs-varid'>styleSheet</span>
<a name="line-16"></a> <span class='hs-layout'>)</span>
<a name="line-17"></a> <span class='hs-keyword'>where</span>
<a name="line-18"></a>
<a name="line-19"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Haddock</span><span class='hs-varop'>.</span><span class='hs-conid'>Options</span>
<a name="line-20"></a>
<a name="line-21"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Applicative</span>
<a name="line-22"></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'>liftM</span><span class='hs-layout'>)</span>
<a name="line-23"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Char</span> <span class='hs-layout'>(</span><span class='hs-varid'>toLower</span><span class='hs-layout'>)</span>
<a name="line-24"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Either</span> <span class='hs-layout'>(</span><span class='hs-varid'>lefts</span><span class='hs-layout'>,</span> <span class='hs-varid'>rights</span><span class='hs-layout'>)</span>
<a name="line-25"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span> <span class='hs-layout'>(</span><span class='hs-varid'>nub</span><span class='hs-layout'>)</span>
<a name="line-26"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>isJust</span><span class='hs-layout'>,</span> <span class='hs-varid'>listToMaybe</span><span class='hs-layout'>)</span>
<a name="line-27"></a>
<a name="line-28"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Directory</span>
<a name="line-29"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>FilePath</span>
<a name="line-30"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>XHtml</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span> <span class='hs-varid'>name</span><span class='hs-layout'>,</span> <span class='hs-varid'>title</span><span class='hs-layout'>,</span> <span class='hs-varid'>p</span><span class='hs-layout'>,</span> <span class='hs-varid'>quote</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varop'></></span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-31"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>XHtml</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>XHtml</span>
<a name="line-32"></a>
<a name="line-33"></a>
<a name="line-34"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-35"></a><span class='hs-comment'>-- * CSS Themes</span>
<a name="line-36"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-37"></a>
<a name="line-38"></a><a name="Theme"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Theme</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Theme</span> <span class='hs-layout'>{</span>
<a name="line-39"></a> <span class='hs-varid'>themeName</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span><span class='hs-layout'>,</span>
<a name="line-40"></a> <span class='hs-varid'>themeHref</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span><span class='hs-layout'>,</span>
<a name="line-41"></a> <span class='hs-varid'>themeFiles</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>FilePath</span><span class='hs-keyglyph'>]</span>
<a name="line-42"></a> <span class='hs-layout'>}</span>
<a name="line-43"></a>
<a name="line-44"></a><a name="Themes"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Themes</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Theme</span><span class='hs-keyglyph'>]</span>
<a name="line-45"></a>
<a name="line-46"></a><a name="PossibleTheme"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>PossibleTheme</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Either</span> <span class='hs-conid'>String</span> <span class='hs-conid'>Theme</span>
<a name="line-47"></a><a name="PossibleThemes"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>PossibleThemes</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Either</span> <span class='hs-conid'>String</span> <span class='hs-conid'>Themes</span>
<a name="line-48"></a>
<a name="line-49"></a>
<a name="line-50"></a><a name="findTheme"></a><span class='hs-comment'>-- | Find a theme by name (case insensitive match)</span>
<a name="line-51"></a><span class='hs-definition'>findTheme</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Themes</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Theme</span>
<a name="line-52"></a><span class='hs-definition'>findTheme</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>listToMaybe</span> <span class='hs-varop'>.</span> <span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>==</span> <span class='hs-varid'>ls</span><span class='hs-layout'>)</span><span class='hs-varop'>.</span><span class='hs-varid'>lower</span><span class='hs-varop'>.</span><span class='hs-varid'>themeName</span><span class='hs-layout'>)</span>
<a name="line-53"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>lower</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-varid'>toLower</span>
<a name="line-54"></a> <span class='hs-varid'>ls</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lower</span> <span class='hs-varid'>s</span>
<a name="line-55"></a>
<a name="line-56"></a>
<a name="line-57"></a><a name="standardTheme"></a><span class='hs-comment'>-- | Standard theme used by default</span>
<a name="line-58"></a><span class='hs-definition'>standardTheme</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>PossibleThemes</span>
<a name="line-59"></a><span class='hs-definition'>standardTheme</span> <span class='hs-varid'>libDir</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftM</span> <span class='hs-layout'>(</span><span class='hs-varid'>liftEither</span> <span class='hs-layout'>(</span><span class='hs-varid'>take</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>defaultThemes</span> <span class='hs-varid'>libDir</span><span class='hs-layout'>)</span>
<a name="line-60"></a>
<a name="line-61"></a>
<a name="line-62"></a><a name="defaultThemes"></a><span class='hs-comment'>-- | Default themes that are part of Haddock; added with --default-themes</span>
<a name="line-63"></a><span class='hs-comment'>-- The first theme in this list is considered the standard theme.</span>
<a name="line-64"></a><span class='hs-comment'>-- Themes are "discovered" by scanning the html sub-dir of the libDir,</span>
<a name="line-65"></a><span class='hs-comment'>-- and looking for directories with the extension .theme or .std-theme.</span>
<a name="line-66"></a><span class='hs-comment'>-- The later is, obviously, the standard theme.</span>
<a name="line-67"></a><span class='hs-definition'>defaultThemes</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>PossibleThemes</span>
<a name="line-68"></a><span class='hs-definition'>defaultThemes</span> <span class='hs-varid'>libDir</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-69"></a> <span class='hs-varid'>themeDirs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getDirectoryItems</span> <span class='hs-layout'>(</span><span class='hs-varid'>libDir</span> <span class='hs-varop'></></span> <span class='hs-str'>"html"</span><span class='hs-layout'>)</span>
<a name="line-70"></a> <span class='hs-varid'>themes</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mapM</span> <span class='hs-varid'>directoryTheme</span> <span class='hs-varop'>$</span> <span class='hs-varid'>discoverThemes</span> <span class='hs-varid'>themeDirs</span>
<a name="line-71"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>sequenceEither</span> <span class='hs-varid'>themes</span>
<a name="line-72"></a> <span class='hs-keyword'>where</span>
<a name="line-73"></a> <span class='hs-varid'>discoverThemes</span> <span class='hs-varid'>paths</span> <span class='hs-keyglyph'>=</span>
<a name="line-74"></a> <span class='hs-varid'>filterExt</span> <span class='hs-str'>".std-theme"</span> <span class='hs-varid'>paths</span> <span class='hs-varop'>++</span> <span class='hs-varid'>filterExt</span> <span class='hs-str'>".theme"</span> <span class='hs-varid'>paths</span>
<a name="line-75"></a> <span class='hs-varid'>filterExt</span> <span class='hs-varid'>ext</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>==</span> <span class='hs-varid'>ext</span><span class='hs-layout'>)</span><span class='hs-varop'>.</span><span class='hs-varid'>takeExtension</span><span class='hs-layout'>)</span>
<a name="line-76"></a>
<a name="line-77"></a>
<a name="line-78"></a><a name="singleFileTheme"></a><span class='hs-comment'>-- | Build a theme from a single .css file</span>
<a name="line-79"></a><span class='hs-definition'>singleFileTheme</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>PossibleTheme</span>
<a name="line-80"></a><span class='hs-definition'>singleFileTheme</span> <span class='hs-varid'>path</span> <span class='hs-keyglyph'>=</span>
<a name="line-81"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>isCssFilePath</span> <span class='hs-varid'>path</span>
<a name="line-82"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>retRight</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Theme</span> <span class='hs-varid'>name</span> <span class='hs-varid'>file</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>path</span><span class='hs-keyglyph'>]</span>
<a name="line-83"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>errMessage</span> <span class='hs-str'>"File extension isn't .css"</span> <span class='hs-varid'>path</span>
<a name="line-84"></a> <span class='hs-keyword'>where</span>
<a name="line-85"></a> <span class='hs-varid'>name</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>takeBaseName</span> <span class='hs-varid'>path</span>
<a name="line-86"></a> <span class='hs-varid'>file</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>takeFileName</span> <span class='hs-varid'>path</span>
<a name="line-87"></a>
<a name="line-88"></a>
<a name="line-89"></a><a name="directoryTheme"></a><span class='hs-comment'>-- | Build a theme from a directory</span>
<a name="line-90"></a><span class='hs-definition'>directoryTheme</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>PossibleTheme</span>
<a name="line-91"></a><span class='hs-definition'>directoryTheme</span> <span class='hs-varid'>path</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-92"></a> <span class='hs-varid'>items</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getDirectoryItems</span> <span class='hs-varid'>path</span>
<a name="line-93"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>filter</span> <span class='hs-varid'>isCssFilePath</span> <span class='hs-varid'>items</span> <span class='hs-keyword'>of</span>
<a name="line-94"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>cf</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>retRight</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Theme</span> <span class='hs-layout'>(</span><span class='hs-varid'>takeBaseName</span> <span class='hs-varid'>path</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>takeFileName</span> <span class='hs-varid'>cf</span><span class='hs-layout'>)</span> <span class='hs-varid'>items</span>
<a name="line-95"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>errMessage</span> <span class='hs-str'>"No .css file in theme directory"</span> <span class='hs-varid'>path</span>
<a name="line-96"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>errMessage</span> <span class='hs-str'>"More than one .css file in theme directory"</span> <span class='hs-varid'>path</span>
<a name="line-97"></a>
<a name="line-98"></a>
<a name="line-99"></a><a name="doesBuiltInExist"></a><span class='hs-comment'>-- | Check if we have a built in theme</span>
<a name="line-100"></a><span class='hs-definition'>doesBuiltInExist</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>PossibleThemes</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-conid'>Bool</span>
<a name="line-101"></a><span class='hs-definition'>doesBuiltInExist</span> <span class='hs-varid'>pts</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>either</span> <span class='hs-layout'>(</span><span class='hs-varid'>const</span> <span class='hs-conid'>False</span><span class='hs-layout'>)</span> <span class='hs-varid'>test</span><span class='hs-layout'>)</span> <span class='hs-varid'>pts</span>
<a name="line-102"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>test</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>isJust</span> <span class='hs-varop'>.</span> <span class='hs-varid'>findTheme</span> <span class='hs-varid'>s</span>
<a name="line-103"></a>
<a name="line-104"></a>
<a name="line-105"></a><a name="builtInTheme"></a><span class='hs-comment'>-- | Find a built in theme</span>
<a name="line-106"></a><span class='hs-definition'>builtInTheme</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>PossibleThemes</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-conid'>PossibleTheme</span>
<a name="line-107"></a><span class='hs-definition'>builtInTheme</span> <span class='hs-varid'>pts</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>either</span> <span class='hs-conid'>Left</span> <span class='hs-varid'>fetch</span> <span class='hs-varop'><$></span> <span class='hs-varid'>pts</span>
<a name="line-108"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>fetch</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Left</span> <span class='hs-layout'>(</span><span class='hs-str'>"Unknown theme: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-conid'>Right</span> <span class='hs-varop'>.</span> <span class='hs-varid'>findTheme</span> <span class='hs-varid'>s</span>
<a name="line-109"></a>
<a name="line-110"></a>
<a name="line-111"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-112"></a><span class='hs-comment'>-- * CSS Theme Arguments</span>
<a name="line-113"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-114"></a>
<a name="line-115"></a><a name="getThemes"></a><span class='hs-comment'>-- | Process input flags for CSS Theme arguments</span>
<a name="line-116"></a><span class='hs-definition'>getThemes</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Flag</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>PossibleThemes</span>
<a name="line-117"></a><span class='hs-definition'>getThemes</span> <span class='hs-varid'>libDir</span> <span class='hs-varid'>flags</span> <span class='hs-keyglyph'>=</span>
<a name="line-118"></a> <span class='hs-varid'>liftM</span> <span class='hs-varid'>concatEither</span> <span class='hs-layout'>(</span><span class='hs-varid'>mapM</span> <span class='hs-varid'>themeFlag</span> <span class='hs-varid'>flags</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>someTheme</span>
<a name="line-119"></a> <span class='hs-keyword'>where</span>
<a name="line-120"></a> <span class='hs-varid'>themeFlag</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Flag</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Either</span> <span class='hs-conid'>String</span> <span class='hs-conid'>Themes</span><span class='hs-layout'>)</span>
<a name="line-121"></a> <span class='hs-varid'>themeFlag</span> <span class='hs-layout'>(</span><span class='hs-conid'>Flag_CSS</span> <span class='hs-varid'>path</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>liftM</span> <span class='hs-varop'>.</span> <span class='hs-varid'>liftEither</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conop'>:</span><span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>theme</span> <span class='hs-varid'>path</span><span class='hs-layout'>)</span>
<a name="line-122"></a> <span class='hs-varid'>themeFlag</span> <span class='hs-layout'>(</span><span class='hs-conid'>Flag_BuiltInThemes</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>builtIns</span>
<a name="line-123"></a> <span class='hs-varid'>themeFlag</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>retRight</span> <span class='hs-conid'>[]</span>
<a name="line-124"></a>
<a name="line-125"></a> <span class='hs-varid'>theme</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>PossibleTheme</span>
<a name="line-126"></a> <span class='hs-varid'>theme</span> <span class='hs-varid'>path</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pick</span> <span class='hs-varid'>path</span>
<a name="line-127"></a> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>doesFileExist</span><span class='hs-layout'>,</span> <span class='hs-varid'>singleFileTheme</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-128"></a> <span class='hs-layout'>(</span><span class='hs-varid'>doesDirectoryExist</span><span class='hs-layout'>,</span> <span class='hs-varid'>directoryTheme</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-129"></a> <span class='hs-layout'>(</span><span class='hs-varid'>doesBuiltInExist</span> <span class='hs-varid'>builtIns</span><span class='hs-layout'>,</span> <span class='hs-varid'>builtInTheme</span> <span class='hs-varid'>builtIns</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-130"></a> <span class='hs-str'>"Theme not found"</span>
<a name="line-131"></a>
<a name="line-132"></a> <span class='hs-varid'>pick</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span>
<a name="line-133"></a> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Bool</span><span class='hs-layout'>,</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>PossibleTheme</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-134"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>PossibleTheme</span>
<a name="line-135"></a> <span class='hs-varid'>pick</span> <span class='hs-varid'>path</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>msg</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>errMessage</span> <span class='hs-varid'>msg</span> <span class='hs-varid'>path</span>
<a name="line-136"></a> <span class='hs-varid'>pick</span> <span class='hs-varid'>path</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>test</span><span class='hs-layout'>,</span><span class='hs-varid'>build</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-varid'>opts</span><span class='hs-layout'>)</span> <span class='hs-varid'>msg</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-137"></a> <span class='hs-varid'>pass</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>test</span> <span class='hs-varid'>path</span>
<a name="line-138"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>pass</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>build</span> <span class='hs-varid'>path</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>pick</span> <span class='hs-varid'>path</span> <span class='hs-varid'>opts</span> <span class='hs-varid'>msg</span>
<a name="line-139"></a>
<a name="line-140"></a>
<a name="line-141"></a> <span class='hs-varid'>someTheme</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Either</span> <span class='hs-conid'>String</span> <span class='hs-conid'>Themes</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Either</span> <span class='hs-conid'>String</span> <span class='hs-conid'>Themes</span><span class='hs-layout'>)</span>
<a name="line-142"></a> <span class='hs-varid'>someTheme</span> <span class='hs-layout'>(</span><span class='hs-conid'>Right</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>standardTheme</span> <span class='hs-varid'>libDir</span>
<a name="line-143"></a> <span class='hs-varid'>someTheme</span> <span class='hs-varid'>est</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varid'>est</span>
<a name="line-144"></a>
<a name="line-145"></a> <span class='hs-varid'>builtIns</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>defaultThemes</span> <span class='hs-varid'>libDir</span>
<a name="line-146"></a>
<a name="line-147"></a>
<a name="line-148"></a><a name="errMessage"></a><span class='hs-definition'>errMessage</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Either</span> <span class='hs-conid'>String</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-149"></a><span class='hs-definition'>errMessage</span> <span class='hs-varid'>msg</span> <span class='hs-varid'>path</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Left</span> <span class='hs-varid'>msg'</span><span class='hs-layout'>)</span>
<a name="line-150"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>msg'</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"Error: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>msg</span> <span class='hs-varop'>++</span> <span class='hs-str'>": \""</span> <span class='hs-varop'>++</span> <span class='hs-varid'>path</span> <span class='hs-varop'>++</span> <span class='hs-str'>"\"\n"</span>
<a name="line-151"></a>
<a name="line-152"></a>
<a name="line-153"></a><a name="retRight"></a><span class='hs-definition'>retRight</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Either</span> <span class='hs-conid'>String</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-154"></a><span class='hs-definition'>retRight</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Right</span>
<a name="line-155"></a>
<a name="line-156"></a>
<a name="line-157"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-158"></a><span class='hs-comment'>-- * File Utilities</span>
<a name="line-159"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-160"></a>
<a name="line-161"></a>
<a name="line-162"></a><a name="getDirectoryItems"></a><span class='hs-definition'>getDirectoryItems</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>FilePath</span><span class='hs-keyglyph'>]</span>
<a name="line-163"></a><span class='hs-definition'>getDirectoryItems</span> <span class='hs-varid'>path</span> <span class='hs-keyglyph'>=</span>
<a name="line-164"></a> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>combine</span> <span class='hs-varid'>path</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>filter</span> <span class='hs-varid'>notDot</span> <span class='hs-varop'><$></span> <span class='hs-varid'>getDirectoryContents</span> <span class='hs-varid'>path</span>
<a name="line-165"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>notDot</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>s</span> <span class='hs-varop'>/=</span> <span class='hs-str'>"."</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>s</span> <span class='hs-varop'>/=</span> <span class='hs-str'>".."</span>
<a name="line-166"></a>
<a name="line-167"></a>
<a name="line-168"></a><a name="isCssFilePath"></a><span class='hs-definition'>isCssFilePath</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-169"></a><span class='hs-definition'>isCssFilePath</span> <span class='hs-varid'>path</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>takeExtension</span> <span class='hs-varid'>path</span> <span class='hs-varop'>==</span> <span class='hs-str'>".css"</span>
<a name="line-170"></a>
<a name="line-171"></a>
<a name="line-172"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-173"></a><span class='hs-comment'>-- * Style Sheet Utilities</span>
<a name="line-174"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-175"></a>
<a name="line-176"></a><a name="cssFiles"></a><span class='hs-definition'>cssFiles</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Themes</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span>
<a name="line-177"></a><span class='hs-definition'>cssFiles</span> <span class='hs-varid'>ts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>nub</span> <span class='hs-varop'>$</span> <span class='hs-varid'>concatMap</span> <span class='hs-varid'>themeFiles</span> <span class='hs-varid'>ts</span>
<a name="line-178"></a>
<a name="line-179"></a>
<a name="line-180"></a><a name="styleSheet"></a><span class='hs-definition'>styleSheet</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Themes</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Html</span>
<a name="line-181"></a><span class='hs-definition'>styleSheet</span> <span class='hs-varid'>ts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toHtml</span> <span class='hs-varop'>$</span> <span class='hs-varid'>zipWith</span> <span class='hs-varid'>mkLink</span> <span class='hs-varid'>rels</span> <span class='hs-varid'>ts</span>
<a name="line-182"></a> <span class='hs-keyword'>where</span>
<a name="line-183"></a> <span class='hs-varid'>rels</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"stylesheet"</span> <span class='hs-conop'>:</span> <span class='hs-varid'>repeat</span> <span class='hs-str'>"alternate stylesheet"</span>
<a name="line-184"></a> <span class='hs-varid'>mkLink</span> <span class='hs-varid'>aRel</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span>
<a name="line-185"></a> <span class='hs-varid'>thelink</span>
<a name="line-186"></a> <span class='hs-varop'>!</span> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>href</span> <span class='hs-layout'>(</span><span class='hs-varid'>themeHref</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>rel</span> <span class='hs-varid'>aRel</span><span class='hs-layout'>,</span> <span class='hs-varid'>thetype</span> <span class='hs-str'>"text/css"</span><span class='hs-layout'>,</span>
<a name="line-187"></a> <span class='hs-conid'>XHtml</span><span class='hs-varop'>.</span><span class='hs-varid'>title</span> <span class='hs-layout'>(</span><span class='hs-varid'>themeName</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-188"></a> <span class='hs-keyglyph'>]</span>
<a name="line-189"></a> <span class='hs-varop'><<</span> <span class='hs-varid'>noHtml</span>
<a name="line-190"></a>
<a name="line-191"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-192"></a><span class='hs-comment'>-- * Either Utilities</span>
<a name="line-193"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-194"></a>
<a name="line-195"></a><span class='hs-comment'>-- These three routines are here because Haddock does not have access to the</span>
<a name="line-196"></a><span class='hs-comment'>-- Control.Monad.Error module which supplies the Functor and Monad instances</span>
<a name="line-197"></a><span class='hs-comment'>-- for Either String.</span>
<a name="line-198"></a>
<a name="line-199"></a><a name="sequenceEither"></a><span class='hs-definition'>sequenceEither</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Either</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Either</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>b</span><span class='hs-keyglyph'>]</span>
<a name="line-200"></a><span class='hs-definition'>sequenceEither</span> <span class='hs-varid'>es</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Right</span> <span class='hs-varop'>$</span> <span class='hs-varid'>rights</span> <span class='hs-varid'>es</span><span class='hs-layout'>)</span> <span class='hs-conid'>Left</span> <span class='hs-layout'>(</span><span class='hs-varid'>listToMaybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>lefts</span> <span class='hs-varid'>es</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-201"></a>
<a name="line-202"></a>
<a name="line-203"></a><a name="liftEither"></a><span class='hs-definition'>liftEither</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Either</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Either</span> <span class='hs-varid'>a</span> <span class='hs-varid'>c</span>
<a name="line-204"></a><span class='hs-definition'>liftEither</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>either</span> <span class='hs-conid'>Left</span> <span class='hs-layout'>(</span><span class='hs-conid'>Right</span> <span class='hs-varop'>.</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span>
<a name="line-205"></a>
<a name="line-206"></a>
<a name="line-207"></a><a name="concatEither"></a><span class='hs-definition'>concatEither</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Either</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>b</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Either</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>b</span><span class='hs-keyglyph'>]</span>
<a name="line-208"></a><span class='hs-definition'>concatEither</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftEither</span> <span class='hs-varid'>concat</span> <span class='hs-varop'>.</span> <span class='hs-varid'>sequenceEither</span>
<a name="line-209"></a>
</pre></body>
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