# 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 ConfigParser

from i18n import gettext as _

from demandload import *

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

class ui(object):

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

                 interactive=True, parentui=None):

        self.overlay = {}

        if parentui is None:

            # this is the parent of all ui children

            self.parentui = None

            self.cdata = ConfigParser.SafeConfigParser()

            self.readconfig(util.rcpath)

            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.updateopts(verbose, debug, quiet, interactive)

            self.diffcache = None

        else:

            # parentui may point to an ui object which is already a child

            self.parentui = parentui.parentui or parentui

            parent_cdata = self.parentui.cdata

            self.cdata = ConfigParser.SafeConfigParser(parent_cdata.defaults())

            # make interpolation work

            for section in parent_cdata.sections():

                self.cdata.add_section(section)

                for name, value in parent_cdata.items(section, raw=True):

                    self.cdata.set(section, name, value)

    def __getattr__(self, key):

        return getattr(self.parentui, key)

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

                 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, fn, root=None):

        if isinstance(fn, basestring):

            fn = [fn]

        for f in fn:

            try:

                self.cdata.read(f)

            except ConfigParser.ParsingError, inst:

                raise util.Abort(_("Failed to parse %s\n%s") % (f, inst))

        # translate paths relative to root (or home) into absolute paths

        if root is None:

            root = os.path.expanduser('~')

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

            if path and path.find("://") == -1 and not os.path.isabs(path):

                self.cdata.set("paths", name, os.path.join(root, path))

    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):

            try:

                return self.cdata.get(section, name)

            except ConfigParser.InterpolationError, inst:

                raise util.Abort(_("Error in configuration:\n%s") % inst)

        if self.parentui is None:

            return default

        else:

            return self.parentui.config(section, name, 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):

            try:

                return self.cdata.getboolean(section, name)

            except ConfigParser.InterpolationError, inst:

                raise util.Abort(_("Error in configuration:\n%s") % inst)

        if self.parentui is None:

            return default

        else:

            return self.parentui.configbool(section, name, default)

    def configitems(self, section):

        items = {}

        if self.parentui is not None:

            items = dict(self.parentui.configitems(section))

        if self.cdata.has_section(section):

            try:

                items.update(dict(self.cdata.items(section)))

            except ConfigParser.InterpolationError, inst:

                raise util.Abort(_("Error in configuration:\n%s") % inst)

        x = items.items()

        x.sort()

        return x

    def walkconfig(self, seen=None):

        if seen is None:

            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

        if self.parentui is not None:

            for parent in self.parentui.walkconfig(seen):

                yield parent

    def extensions(self):

        return self.configitems("extensions")

    def diffopts(self):

        if self.diffcache:

            return self.diffcache

        ret = { 'showfunc' : True, 'ignorews' : False}

        for x in self.configitems("diff"):

            k = x[0].lower()

            v = x[1]

            if v:

                v = v.lower()

                if v == 'true':

                    value = True

                else:

                    value = False

                ret[k] = value

        self.diffcache = ret

        return ret

    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 shortuser(self, user):

        """Return a short representation of a user name or email address."""

        if not self.verbose: user = util.shortuser(user)

        return user

    def expandpath(self, loc):

        """Return repository location relative to cwd or from [paths]"""

        if loc.find("://") != -1 or os.path.exists(loc):

            return loc

        return self.config("paths", loc, loc)

    def write(self, *args):

        for a in args:

            sys.stdout.write(str(a))

    def write_err(self, *args):

        if not sys.stdout.closed: sys.stdout.flush()

        for a in args:

            sys.stderr.write(str(a))

    def flush(self):

        try:

            sys.stdout.flush()

        finally:

            sys.stderr.flush()

    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),

                    environ={'HGUSER': self.username()},

                    onerr=util.Abort, errprefix=_("edit failed"))

        t = open(name).read()

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

        os.unlink(name)

        return t