    -- Copyright (C) 2003 David Roundy
    --
    -- This program is free software; you can redistribute it and/or modify
    -- it under the terms of the GNU General Public License as published by
    -- the Free Software Foundation; either version 2, or (at your option)
    -- any later version.
    --
    -- This program is distributed in the hope that it will be useful,
    -- but WITHOUT ANY WARRANTY; without even the implied warranty of
    -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    -- GNU General Public License for more details.
    --
    -- You should have received a copy of the GNU General Public License
    -- along with this program; see the file COPYING.  If not, write to
    -- the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    -- Boston, MA 02110-1301, USA.

    {-# OPTIONS_GHC -cpp #-}
    {-# LANGUAGE CPP #-}

    #include "gadts.h"

    module Darcs.PrintPatch ( printPatch, contextualPrintPatch,
                              printPatchPager, printFriendly ) where

    import Darcs.Patch ( Patchy, showContextPatch, showPatch )
    import Storage.Hashed.Tree( Tree )
    import Storage.Hashed.Monad( virtualTreeIO )
    import Darcs.Arguments ( DarcsFlag, showFriendly )
    import Printer ( putDocLnWith )
    import Darcs.ColorPrinter ( fancyPrinters )
    import Darcs.External ( viewDocWith )

    -- | @'printFriendly' opts patch@ prints @patch@ in accordance with the
    -- flags in opts, ie, whether @--verbose@ or @--summary@ were passed at
    -- the command-line.
    printFriendly :: Patchy p => [DarcsFlag] -> p C(x y) -> IO ()
    printFriendly opts p = putDocLnWith fancyPrinters $ showFriendly opts p

    -- | 'printPatch' prints a patch on standard output.
    printPatch :: Patchy p => p C(x y) -> IO ()
    printPatch p = putDocLnWith fancyPrinters $ showPatch p

    -- | 'printPatchPager' runs '$PAGER' and shows a patch in it.
    printPatchPager :: Patchy p => p C(x y) -> IO ()
    printPatchPager p = viewDocWith fancyPrinters $ showPatch p

    -- | 'contextualPrintPatch' prints a patch, together with its context,
    -- on standard output.
    contextualPrintPatch :: Patchy p => Tree IO -> p C(x y) -> IO ()
    contextualPrintPatch s p = virtualTreeIO (showContextPatch p) s >>= putDocLnWith fancyPrinters . fst