# 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, ConfigParser

from demandload import *

demandload(globals(), "re socket sys util")

class ui:

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

                 interactive=True):

        self.overlay = {}

        self.cdata = ConfigParser.SafeConfigParser()

        self.cdata.read([os.path.normpath(hgrc) for hgrc in

                         "/etc/mercurial/hgrc", os.path.expanduser("~/.hgrc")])

        self.quiet = self.configbool("ui", "quiet")

        self.verbose = self.configbool("ui", "verbose")

        self.debugflag = self.configbool("ui", "debug")

        self.interactive = self.configbool("ui", "interactive", True)

        self.quiet = (self.quiet or quiet) and not verbose and not debug

        self.verbose = (self.verbose or verbose) or debug

        self.debugflag = (self.debugflag or debug)

        self.interactive = (self.interactive and interactive)

    def readconfig(self, fp):

        self.cdata.readfp(fp)

    def setconfig(self, section, name, val):

        self.overlay[(section, name)] = val

    def config(self, section, name, default=None):

        if self.overlay.has_key((section, name)):

            return self.overlay[(section, name)]

        if self.cdata.has_option(section, name):

            return self.cdata.get(section, name)

        return default

    def configbool(self, section, name, default=False):

        if self.overlay.has_key((section, name)):

            return self.overlay[(section, name)]

        if self.cdata.has_option(section, name):

            return self.cdata.getboolean(section, name)

        return default

    def configitems(self, section):

        if self.cdata.has_section(section):

            return self.cdata.items(section)

        return []

    def walkconfig(self):

        seen = {}

        for (section, name), value in self.overlay.iteritems():

            yield section, name, value

            seen[section, name] = 1

        for section in self.cdata.sections():

            for name, value in self.cdata.items(section):

                if (section, name) in seen: continue

                yield section, name, value.replace('\n', '\\n')

                seen[section, name] = 1

    def username(self):

        return (os.environ.get("HGUSER") or

                self.config("ui", "username") or

                os.environ.get("EMAIL") or

                (os.environ.get("LOGNAME",

                                os.environ.get("USERNAME", "unknown"))

                 + '@' + socket.getfqdn()))

    def expandpath(self, loc):

        paths = {}

        for name, path in self.configitems("paths"):

            paths[name] = path

        return paths.get(loc, loc)

    def write(self, *args):

        for a in args:

            sys.stdout.write(str(a))

    def write_err(self, *args):

        sys.stdout.flush()

        for a in args:

            sys.stderr.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_err(*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):

        import tempfile

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

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

        f.write(text)

        f.close()

        editor = (os.environ.get("HGEDITOR") or

                  self.config("ui", "editor") or

                  os.environ.get("EDITOR", "vi"))

        os.environ["HGUSER"] = self.username()

        util.system("%s %s" % (editor, name), errprefix="edit failed")

        t = open(name).read()

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

        os.unlink(name)

        return t