HsColour: A Haskell source-code colouriser.
-------------------------------------------
Copyright:  2003-2010, Malcolm Wallace, University of York
Licence:    GPL

Building:
    hmake HsColour
or
    ghc --make HsColour

Usage:
    HsColour [-Ofile]
             [ -tty | -html | -css | -icss | -latex | -mirc ]
             [ -lit | -lit-tex | -anchor  | -partial ]
             [ -nolit          | -noanchor| -nopartial ]
             [file.hs]

The program can colourise a Haskell source file for either terminal
output (option -tty), or HTML 3.2 output with font tags (option -html),
or HTML 4.01 output with CSS (option -css), or XHTML 1.0 output with
inline styling (option -icss) or LaTeX output (option -latex), or IRC
chat client (option -mirc).  The default is for terminal output, which
uses standard ANSI screen codes for the colours.

If no file argument is given, it reads standard input.  Output is
written to the file specified by the -O option, or by default, stdout.

HsColour can add named anchors in HTML or CSS or ICSS (option -anchor) to
top-level definitions in the source file (functions, datatypes,
classes).  This enables you to make links to a specific location in the
generated file with the standard "file.html#anchor" notation.

If an input file is literate, that is, it has a suffix ".lhs" or ".ly"
or ".lx", then only the code fragments will be colourised, leaving the
commentary untouched.  You can explicitly override this
filename-guessing of literate status: use the -lit option to
force literate colouring, or -nolit to force all text to be
colourised.  (-lit-tex is an obsolete synonym for -lit)

For more advanced usage, if you are building documents in parts, and you
want to embed several individually colourised fragments into a larger
document, use the <tt>-partial</tt> option with each fragment, to omit
the HTML DOCTYPE header, CSS stylesheet link, or LaTeX prologue.

You can configure the colours for different lexical entities by
editing a configuration file called .hscolour in the current directory.
(An example is included in the distribution.)  The file format is as
a simple Haskell value of type ColourPrefs, constructed using named
fields, as follows:

  data ColourPrefs = ColourPrefs
    { keyword, keyglyph, layout, comment
    , conid, varid, conop, varop
    , string, char, number, cpp
    , selection, variantselection :: [Highlight]
    }

  data Colour = Black | Red | Green | Yellow | Blue | Magenta | Cyan | White

  data Highlight =
      Normal
    | Bold
    | Dim
    | Underscore
    | Blink
    | ReverseVideo
    | Concealed
    | Foreground Colour
    | Background Colour
    | Italic

For CSS output, it is sufficient to edit the hscolour.css file, also in
the distribution.