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//
// Beagle
//
// FilterMan.cs : Trivial implementation of a man-page filter.
//
// Author :
// Michael Levy <mlevy@wardium.homeip.net>
//
// Copyright (C) 2004 Michael levy
//
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
using System;
using System.IO;
using System.Text;
using System.Text.RegularExpressions;
using Beagle.Daemon;
namespace Beagle.Filters {
public class FilterMan : Beagle.Daemon.Filter {
StreamReader reader;
public FilterMan ()
{
// Make this a general troff filter.
AddSupportedFlavor (FilterFlavor.NewFromMimeType ("application/x-troff-man"));
AddSupportedFlavor (FilterFlavor.NewFromMimeType ("text/x-troff-man"));
AddSupportedFlavor (FilterFlavor.NewFromMimeType ("application/x-troff"));
AddSupportedFlavor (FilterFlavor.NewFromMimeType ("text/x-troff"));
}
/*
FIXME:
Right now we don't handle pages with just one line like:
.so man3/strcpy.3
Which is in strncpy.3.gz and points to strcpy.3.gz
*/
protected void ParseManFile (StreamReader reader)
{
string str;
/*
The regular expression for a complete man header line is built to allow a suite of
non-spaces, or words separated by spaces which are encompassed in quotes
The regexp should be :
Regex headerRE = new Regex (@"^\.TH\s+" +
@"(?<title>(\S+|(""(\S+\s*)+"")))\s+" +
@"(?<section>\d+)\s+" +
@"(?<date>(\S+|(""(\S+\s*)+"")))\s+" +
@"(?<source>(\S+|(""(\S+\s*)+"")))\s+" +
@"(?<manual>(\S+|(""(\S+\s*)+"")))\s*" +
"$");
But there seem to be a number of broken man pages, and the current filter can be used
for general troff pages.
*/
Regex headerRE = new Regex (@"^\.TH\s+" +
@"(?<title>(\S+|(""(\S+\s*)+"")))\s*");
while ((str = reader.ReadLine ()) != null) {
if (str.StartsWith (".\"")) {
/* Comment in man page */
continue;
} else if (str.StartsWith (".TH ")) {
MatchCollection matches = headerRE.Matches (str);
if (matches.Count != 1) {
Console.Error.WriteLine ("In title Expected 1 match but found {0} matches in '{1}'",
matches.Count, str);
continue;
}
foreach (Match theMatch in matches) {
AddProperty (Beagle.Property.New ("dc:title",
theMatch.Groups ["title"].ToString ()));
}
} else {
// A "regular" string
// FIXME: We need to strip out other macros
// (.SH for example)
AppendText (str);
}
}
Finished ();
}
override protected void DoOpen (FileInfo info)
{
Stream stream;
stream = new FileStream (info.FullName,
FileMode.Open,
FileAccess.Read,
FileShare.Read);
reader = new StreamReader (stream);
}
override protected void DoPull ()
{
ParseManFile (reader);
}
}
}
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