/usr/share/doc/libghc-fgl-doc/html/src/Data-Graph-Inductive-Graphviz.html is in libghc-fgl-doc 5.4.2.4-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 | <?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>Data/Graph/Inductive/Graphviz.hs</title>
<link type='text/css' rel='stylesheet' href='hscolour.css' />
</head>
<body>
<pre><a name="line-1"></a><span class='hs-comment'>-- | Simple graphviz output.</span>
<a name="line-2"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Graph</span><span class='hs-varop'>.</span><span class='hs-conid'>Inductive</span><span class='hs-varop'>.</span><span class='hs-conid'>Graphviz</span><span class='hs-layout'>(</span>
<a name="line-3"></a> <span class='hs-conid'>Orient</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-4"></a> <span class='hs-varid'>graphviz</span><span class='hs-layout'>,</span> <span class='hs-varid'>graphviz'</span>
<a name="line-5"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-6"></a>
<a name="line-7"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Graph</span><span class='hs-varop'>.</span><span class='hs-conid'>Inductive</span><span class='hs-varop'>.</span><span class='hs-conid'>Graph</span>
<a name="line-8"></a>
<a name="line-9"></a><a name="Orient"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Orient</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Portrait</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Landscape</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span><span class='hs-layout'>)</span>
<a name="line-10"></a>
<a name="line-11"></a><a name="o2s"></a><span class='hs-definition'>o2s</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Orient</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-12"></a><span class='hs-definition'>o2s</span> <span class='hs-conid'>Portrait</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"\trotate = \"0\"\n"</span>
<a name="line-13"></a><span class='hs-definition'>o2s</span> <span class='hs-conid'>Landscape</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"\trotate = \"90\"\n"</span>
<a name="line-14"></a>
<a name="line-15"></a><a name="graphviz"></a><span class='hs-comment'>-- | Formats a graph for use in graphviz.</span>
<a name="line-16"></a><span class='hs-definition'>graphviz</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Graph</span> <span class='hs-varid'>g</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>g</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-comment'>-- ^ The graph to format</span>
<a name="line-17"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ The title of the graph</span>
<a name="line-18"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Double</span><span class='hs-layout'>,</span> <span class='hs-conid'>Double</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ The size</span>
<a name="line-19"></a> <span class='hs-comment'>-- of the page</span>
<a name="line-20"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span><span class='hs-layout'>,</span> <span class='hs-conid'>Int</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ The width and</span>
<a name="line-21"></a> <span class='hs-comment'>-- height of the page</span>
<a name="line-22"></a> <span class='hs-comment'>-- grid</span>
<a name="line-23"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Orient</span> <span class='hs-comment'>-- ^ The orientation of</span>
<a name="line-24"></a> <span class='hs-comment'>-- the graph.</span>
<a name="line-25"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-26"></a>
<a name="line-27"></a><a name="i2d"></a><span class='hs-definition'>i2d</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Double</span>
<a name="line-28"></a><span class='hs-definition'>i2d</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromInteger</span> <span class='hs-varop'>.</span> <span class='hs-varid'>toInteger</span>
<a name="line-29"></a>
<a name="line-30"></a><span class='hs-definition'>graphviz</span> <span class='hs-varid'>g</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>p</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-varid'>pw'</span><span class='hs-layout'>,</span> <span class='hs-varid'>ph'</span><span class='hs-layout'>)</span> <span class='hs-varid'>o</span> <span class='hs-keyglyph'>=</span>
<a name="line-31"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>labNodes</span> <span class='hs-varid'>g</span>
<a name="line-32"></a> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>labEdges</span> <span class='hs-varid'>g</span>
<a name="line-33"></a> <span class='hs-varid'>ns</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concatMap</span> <span class='hs-varid'>sn</span> <span class='hs-varid'>n</span>
<a name="line-34"></a> <span class='hs-varid'>es</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concatMap</span> <span class='hs-varid'>se</span> <span class='hs-varid'>e</span>
<a name="line-35"></a> <span class='hs-varid'>sz</span> <span class='hs-varid'>w'</span> <span class='hs-varid'>h'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>o</span> <span class='hs-varop'>==</span> <span class='hs-conid'>Portrait</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>show</span> <span class='hs-varid'>w'</span><span class='hs-varop'>++</span><span class='hs-str'>","</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-varid'>h'</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>show</span> <span class='hs-varid'>h'</span><span class='hs-varop'>++</span><span class='hs-str'>","</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-varid'>w'</span>
<a name="line-36"></a> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>show</span> <span class='hs-varid'>w</span><span class='hs-varop'>++</span><span class='hs-str'>","</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-varid'>h</span>
<a name="line-37"></a> <span class='hs-layout'>(</span><span class='hs-varid'>pw</span><span class='hs-layout'>,</span> <span class='hs-varid'>ph</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>o</span> <span class='hs-varop'>==</span> <span class='hs-conid'>Portrait</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>p</span> <span class='hs-keyword'>else</span> <span class='hs-layout'>(</span><span class='hs-varid'>ph'</span><span class='hs-layout'>,</span> <span class='hs-varid'>pw'</span><span class='hs-layout'>)</span>
<a name="line-38"></a> <span class='hs-comment'>--gs = show ((w*(i2d pw))-m)++","++show ((h*(i2d ph))-m)</span>
<a name="line-39"></a> <span class='hs-varid'>gs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sz</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-varop'>*</span><span class='hs-layout'>(</span><span class='hs-varid'>i2d</span> <span class='hs-varid'>pw</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>h</span><span class='hs-varop'>*</span><span class='hs-layout'>(</span><span class='hs-varid'>i2d</span> <span class='hs-varid'>ph</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-40"></a> <span class='hs-keyword'>in</span> <span class='hs-str'>"digraph "</span><span class='hs-varop'>++</span><span class='hs-varid'>t</span><span class='hs-varop'>++</span><span class='hs-str'>" {\n"</span>
<a name="line-41"></a> <span class='hs-varop'>++</span><span class='hs-str'>"\tmargin = \"0\"\n"</span>
<a name="line-42"></a> <span class='hs-varop'>++</span><span class='hs-str'>"\tpage = \""</span><span class='hs-varop'>++</span><span class='hs-varid'>ps</span><span class='hs-varop'>++</span><span class='hs-str'>"\"\n"</span>
<a name="line-43"></a> <span class='hs-varop'>++</span><span class='hs-str'>"\tsize = \""</span><span class='hs-varop'>++</span><span class='hs-varid'>gs</span><span class='hs-varop'>++</span><span class='hs-str'>"\"\n"</span>
<a name="line-44"></a> <span class='hs-varop'>++</span><span class='hs-varid'>o2s</span> <span class='hs-varid'>o</span>
<a name="line-45"></a> <span class='hs-varop'>++</span><span class='hs-str'>"\tratio = \"fill\"\n"</span>
<a name="line-46"></a> <span class='hs-varop'>++</span><span class='hs-varid'>ns</span>
<a name="line-47"></a> <span class='hs-varop'>++</span><span class='hs-varid'>es</span>
<a name="line-48"></a> <span class='hs-varop'>++</span><span class='hs-str'>"}"</span>
<a name="line-49"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>sn</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>sa</span> <span class='hs-varop'>==</span> <span class='hs-str'>""</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>""</span>
<a name="line-50"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-chr'>'\t'</span><span class='hs-conop'>:</span><span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>n</span> <span class='hs-varop'>++</span> <span class='hs-varid'>sa</span> <span class='hs-varop'>++</span> <span class='hs-str'>"\n"</span><span class='hs-layout'>)</span>
<a name="line-51"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>sa</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sl</span> <span class='hs-varid'>a</span>
<a name="line-52"></a> <span class='hs-varid'>se</span> <span class='hs-layout'>(</span><span class='hs-varid'>n1</span><span class='hs-layout'>,</span> <span class='hs-varid'>n2</span><span class='hs-layout'>,</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-chr'>'\t'</span><span class='hs-conop'>:</span><span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>n1</span> <span class='hs-varop'>++</span> <span class='hs-str'>" -> "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>n2</span> <span class='hs-varop'>++</span> <span class='hs-varid'>sl</span> <span class='hs-varid'>b</span> <span class='hs-varop'>++</span> <span class='hs-str'>"\n"</span><span class='hs-layout'>)</span>
<a name="line-53"></a>
<a name="line-54"></a><a name="graphviz'"></a><span class='hs-comment'>-- | Format a graph for graphviz with reasonable defaults: title of \"fgl\",</span>
<a name="line-55"></a><span class='hs-comment'>-- 8.5x11 pages, one page, landscape orientation</span>
<a name="line-56"></a><span class='hs-definition'>graphviz'</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Graph</span> <span class='hs-varid'>g</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>g</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-57"></a><span class='hs-definition'>graphviz'</span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>graphviz</span> <span class='hs-varid'>g</span> <span class='hs-str'>"fgl"</span> <span class='hs-layout'>(</span><span class='hs-num'>8.5</span><span class='hs-layout'>,</span><span class='hs-num'>11.0</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-num'>1</span><span class='hs-layout'>,</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-conid'>Landscape</span>
<a name="line-58"></a>
<a name="line-59"></a><a name="sq"></a><span class='hs-definition'>sq</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-60"></a><span class='hs-definition'>sq</span> <span class='hs-varid'>s</span><span class='hs-keyglyph'>@</span><span class='hs-keyglyph'>[</span><span class='hs-varid'>c</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>s</span>
<a name="line-61"></a><span class='hs-definition'>sq</span> <span class='hs-layout'>(</span><span class='hs-chr'>'"'</span><span class='hs-conop'>:</span><span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>last</span> <span class='hs-varid'>s</span> <span class='hs-varop'>==</span> <span class='hs-chr'>'"'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>init</span> <span class='hs-varid'>s</span>
<a name="line-62"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>s</span>
<a name="line-63"></a><span class='hs-definition'>sq</span> <span class='hs-layout'>(</span><span class='hs-chr'>'\''</span><span class='hs-conop'>:</span><span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>last</span> <span class='hs-varid'>s</span> <span class='hs-varop'>==</span> <span class='hs-chr'>'\''</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>init</span> <span class='hs-varid'>s</span>
<a name="line-64"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>s</span>
<a name="line-65"></a><span class='hs-definition'>sq</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>s</span>
<a name="line-66"></a>
<a name="line-67"></a><a name="sl"></a><span class='hs-definition'>sl</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-68"></a><span class='hs-definition'>sl</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span>
<a name="line-69"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sq</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-70"></a> <span class='hs-keyword'>in</span> <span class='hs-keyword'>if</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span> <span class='hs-varop'>/=</span> <span class='hs-str'>"()"</span><span class='hs-layout'>)</span> <span class='hs-keyword'>then</span> <span class='hs-layout'>(</span><span class='hs-str'>" [label = \""</span><span class='hs-varop'>++</span><span class='hs-varid'>l</span><span class='hs-varop'>++</span><span class='hs-str'>"\"]"</span><span class='hs-layout'>)</span> <span class='hs-keyword'>else</span> <span class='hs-str'>""</span>
</pre></body>
</html>
|