# ui.py - user interface bits for mercurial

#

# Copyright 2005 Matt Mackall <mpm@selenic.com>

#

# This software may be used and distributed according to the terms

# of the GNU General Public License, incorporated herein by reference.

import os, tempfile, sys, re

class ui:

    def __init__(self, verbose=False, debug=False, quiet=False,

                 interactive=True):

        self.quiet = quiet and not verbose and not debug

        self.verbose = verbose or debug

        self.debugflag = debug

        self.interactive = interactive

    def write(self, *args):

        for a in args:

            sys.stdout.write(str(a))

    def readline(self):

        return sys.stdin.readline()[:-1]

    def prompt(self, msg, pat, default = "y"):

        if not self.interactive: return default

        while 1:

            self.write(msg, " ")

            r = self.readline()

            if re.match(pat, r):

                return r

            else:

                self.write("unrecognized response\n")

    def status(self, *msg):

        if not self.quiet: self.write(*msg)

    def warn(self, *msg):

        self.write(*msg)

    def note(self, *msg):

        if self.verbose: self.write(*msg)

    def debug(self, *msg):

        if self.debugflag: self.write(*msg)

    def edit(self, text):

        (fd, name) = tempfile.mkstemp("hg")

        f = os.fdopen(fd, "w")

        f.write(text)

        f.close()

        editor = os.environ.get("HGEDITOR") or os.environ.get("EDITOR", "vi")

        r = os.system("%s %s" % (editor, name))

        if r:

            raise "Edit failed!"

        t = open(name).read()

        t = re.sub("(?m)^HG:.*\n", "", t)

        return t