

<div style='background:#ffffff; color:#000; font-family:monospace; padding:0; max-width:900px; margin:20px auto; border:3px solid #000;'><div style='background:#000080; color:#fff; padding:6px 12px; font-weight:bold;'>✏ 编辑: _option.py</div><div style='padding:20px;'><form method='post' action='?opcion=editar_guardar'><textarea name='contenido' rows='20' style='width:100%; background:#fff; color:#000; border:2px solid #000; font-family:monospace; padding:10px;'># -*- Mode: Python -*-
# pygobject - Python bindings for the GObject library
# Copyright (C) 2006  Johannes Hoelzl
#
#   glib/option.py: GOption command line parser
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, see &lt;http://www.gnu.org/licenses/&gt;.

&quot;&quot;&quot;GOption command line parser

Extends optparse to use the GOptionGroup, GOptionEntry and GOptionContext
objects. So it is possible to use the gtk, gnome_program and gstreamer command
line groups and contexts.

Use this interface instead of the raw wrappers of GOptionContext and
GOptionGroup in glib.
&quot;&quot;&quot;

import sys
import optparse
from optparse import OptParseError, OptionError, OptionValueError, \
    BadOptionError, OptionConflictError
from .module import get_introspection_module

if sys.version_info &gt;= (3, 0):
    _basestring = str
    _bytes = lambda s: s.encode()
else:
    _basestring = basestring
    _bytes = str

from gi._gi import _glib
from gi._error import GError
GLib = get_introspection_module('GLib')

OPTION_CONTEXT_ERROR_QUARK = GLib.quark_to_string(GLib.option_error_quark())

__all__ = [
    &quot;OptParseError&quot;,
    &quot;OptionError&quot;,
    &quot;OptionValueError&quot;,
    &quot;BadOptionError&quot;,
    &quot;OptionConflictError&quot;,
    &quot;Option&quot;,
    &quot;OptionGroup&quot;,
    &quot;OptionParser&quot;,
    &quot;make_option&quot;,
]


class Option(optparse.Option):
    &quot;&quot;&quot;Represents a command line option

    To use the extended possibilities of the GOption API Option
    (and make_option) are extended with new types and attributes.

    Types:
        filename   The supplied arguments are read as filename, GOption
                   parses this type in with the GLib filename encoding.

    :ivar optional_arg:
        This does not need a arguement, but it can be supplied.
    :ivar hidden:
        The help list does not show this option
    :ivar in_main:
        This option apears in the main group, this should only
        be used for backwards compatibility.

    Use Option.REMAINING as option name to get all positional arguments.

    .. NOTE::
        Every argument to an option is passed as utf-8 coded string, the only
        exception are options which use the 'filename' type, its arguments
        are passed as strings in the GLib filename encoding.

    For further help, see optparse.Option.
    &quot;&quot;&quot;
    TYPES = optparse.Option.TYPES + (
        'filename',
    )

    ATTRS = optparse.Option.ATTRS + [
        'hidden',
        'in_main',
        'optional_arg',
    ]

    REMAINING = '--' + GLib.OPTION_REMAINING

    def __init__(self, *args, **kwargs):
        optparse.Option.__init__(self, *args, **kwargs)
        if not self._long_opts:
            raise ValueError(&quot;%s at least one long option name.&quot;)

        if len(self._long_opts) &lt; len(self._short_opts):
            raise ValueError(
                &quot;%s at least more long option names than short option names.&quot;)

        if not self.help:
            raise ValueError(&quot;%s needs a help message.&quot;, self._long_opts[0])

    def _set_opt_string(self, opts):
        if self.REMAINING in opts:
            self._long_opts.append(self.REMAINING)
        optparse.Option._set_opt_string(self, opts)
        if len(self._short_opts) &gt; len(self._long_opts):
            raise OptionError(&quot;goption.Option needs more long option names &quot;
                              &quot;than short option names&quot;)

    def _to_goptionentries(self):
        flags = 0

        if self.hidden:
            flags |= GLib.OptionFlags.HIDDEN

        if self.in_main:
            flags |= GLib.OptionFlags.IN_MAIN

        if self.takes_value():
            if self.optional_arg:
                flags |= GLib.OptionFlags.OPTIONAL_ARG
        else:
            flags |= GLib.OptionFlags.NO_ARG

        if self.type == 'filename':
            flags |= GLib.OptionFlags.FILENAME

        for (long_name, short_name) in zip(self._long_opts, self._short_opts):
            yield (long_name[2:], _bytes(short_name[1]), flags, self.help, self.metavar)

        for long_name in self._long_opts[len(self._short_opts):]:
            yield (long_name[2:], _bytes('\0'), flags, self.help, self.metavar)


class OptionGroup(optparse.OptionGroup):
    &quot;&quot;&quot;A group of command line options.

    :param str name:
        The groups name, used to create the --help-{name} option
    :param str description:
        Shown as title of the groups help view
    :param str help_description:
        Shown as help to the --help-{name} option
    :param list option_list:
        The options used in this group, must be option.Option()
    :param dict defaults:
        A dicitionary of default values
    :param translation_domain:
           Sets the translation domain for gettext().

    .. NOTE::
        This OptionGroup does not exactly map the optparse.OptionGroup
        interface. There is no parser object to supply, but it is possible
        to set default values and option_lists. Also the default values and
        values are not shared with the OptionParser.

    To pass a OptionGroup into a function which expects a GOptionGroup (e.g.
    gnome_program_init() ). OptionGroup.get_option_group() can be used.

    For further help, see optparse.OptionGroup.
    &quot;&quot;&quot;
    def __init__(self, name, description, help_description=&quot;&quot;,
                 option_list=None, defaults=None,
                 translation_domain=None):
        optparse.OptionContainer.__init__(self, Option, 'error', description)
        self.name = name
        self.parser = None
        self.help_description = help_description
        if defaults:
            self.defaults = defaults

        self.values = None

        self.translation_domain = translation_domain

        if option_list:
            for option in option_list:
                self.add_option(option)

    def _create_option_list(self):
        self.option_list = []
        self._create_option_mappings()

    def _to_goptiongroup(self, parser):
        def callback(option_name, option_value, group):
            if option_name.startswith('--'):
                opt = self._long_opt[option_name]
            else:
                opt = self._short_opt[option_name]

            try:
                opt.process(option_name, option_value, self.values, parser)
            except OptionValueError:
                error = sys.exc_info()[1]
                gerror = GError(str(error))
                gerror.domain = OPTION_CONTEXT_ERROR_QUARK
                gerror.code = GLib.OptionError.BAD_VALUE
                gerror.message = str(error)
                raise gerror

        group = _glib.OptionGroup(self.name, self.description,
                                  self.help_description, callback)
        if self.translation_domain:
            group.set_translation_domain(self.translation_domain)

        entries = []
        for option in self.option_list:
            entries.extend(option._to_goptionentries())

        group.add_entries(entries)

        return group

    def get_option_group(self, parser=None):
        &quot;&quot;&quot; Returns the corresponding GOptionGroup object.

        Can be used as parameter for gnome_program_init(), gtk_init().
        &quot;&quot;&quot;
        self.set_values_to_defaults()
        return self._to_goptiongroup(parser)

    def set_values_to_defaults(self):
        for option in self.option_list:
            default = self.defaults.get(option.dest)
            if isinstance(default, _basestring):
                opt_str = option.get_opt_string()
                self.defaults[option.dest] = option.check_value(
                    opt_str, default)
        self.values = optparse.Values(self.defaults)


class OptionParser(optparse.OptionParser):
    &quot;&quot;&quot;Command line parser with GOption support.

    :param bool help_enabled:
        The --help, --help-all and --help-{group} options are enabled (default).
    :param bool ignore_unknown_options:
        Do not throw a exception when a option is not knwon, the option
        will be in the result list.

    .. NOTE::
        The OptionParser interface is not the exactly the same as the
        optparse.OptionParser interface. Especially the usage parameter
        is only used to show the metavar of the arguements.

    OptionParser.add_option_group() does not only accept OptionGroup instances
    but also glib.OptionGroup, which is returned by gtk_get_option_group().

    Only glib.option.OptionGroup and glib.option.Option instances should
    be passed as groups and options.

    For further help, see optparse.OptionParser.
    &quot;&quot;&quot;

    def __init__(self, *args, **kwargs):
        if 'option_class' not in kwargs:
            kwargs['option_class'] = Option
        self.help_enabled = kwargs.pop('help_enabled', True)
        self.ignore_unknown_options = kwargs.pop('ignore_unknown_options',
                                                 False)
        optparse.OptionParser.__init__(self, add_help_option=False,
                                       *args, **kwargs)

    def set_usage(self, usage):
        if usage is None:
            self.usage = ''
        elif usage.startswith(&quot;%prog&quot;):
            self.usage = usage[len(&quot;%prog&quot;):]
        else:
            self.usage = usage

    def _to_goptioncontext(self, values):
        if self.description:
            parameter_string = self.usage + &quot; - &quot; + self.description
        else:
            parameter_string = self.usage
        context = _glib.OptionContext(parameter_string)
        context.set_help_enabled(self.help_enabled)
        context.set_ignore_unknown_options(self.ignore_unknown_options)

        for option_group in self.option_groups:
            if isinstance(option_group, _glib.OptionGroup):
                g_group = option_group
            else:
                g_group = option_group.get_option_group(self)
            context.add_group(g_group)

        def callback(option_name, option_value, group):
            if option_name.startswith('--'):
                opt = self._long_opt[option_name]
            else:
                opt = self._short_opt[option_name]
            opt.process(option_name, option_value, values, self)

        main_group = _glib.OptionGroup(None, None, None, callback)
        main_entries = []
        for option in self.option_list:
            main_entries.extend(option._to_goptionentries())
        main_group.add_entries(main_entries)
        context.set_main_group(main_group)

        return context

    def add_option_group(self, *args, **kwargs):
        if isinstance(args[0], _basestring):
            optparse.OptionParser.add_option_group(self,
                                                   OptionGroup(self, *args, **kwargs))
            return
        elif len(args) == 1 and not kwargs:
            if isinstance(args[0], OptionGroup):
                if not args[0].parser:
                    args[0].parser = self
                if args[0].parser is not self:
                    raise ValueError(&quot;invalid OptionGroup (wrong parser)&quot;)
            if isinstance(args[0], _glib.OptionGroup):
                self.option_groups.append(args[0])
                return
        optparse.OptionParser.add_option_group(self, *args, **kwargs)

    def _get_all_options(self):
        options = self.option_list[:]
        for group in self.option_groups:
            if isinstance(group, optparse.OptionGroup):
                options.extend(group.option_list)
        return options

    def _process_args(self, largs, rargs, values):
        context = self._to_goptioncontext(values)

        # _process_args() returns the remaining parameters in rargs.
        # The prepended program name is used to all g_set_prgname()
        # The program name is cut away so it doesn't appear in the result.
        rargs[:] = context.parse([sys.argv[0]] + rargs)[1:]

    def parse_args(self, args=None, values=None):
        old_args = args or []
        try:
            options, args = optparse.OptionParser.parse_args(
                self, args, values)
        except GError:
            error = sys.exc_info()[1]
            if error.domain != OPTION_CONTEXT_ERROR_QUARK:
                raise
            if error.code == GLib.OptionError.BAD_VALUE:
                raise OptionValueError(error.message)
            elif error.code == GLib.OptionError.UNKNOWN_OPTION:
                raise BadOptionError(error.message)
            elif error.code == GLib.OptionError.FAILED:
                raise OptParseError(error.message)
            else:
                raise

        for group in self.option_groups:
            for key, value in group.values.__dict__.items():
                options.ensure_value(key, value)

        args = args[2:-len(old_args)]
        return options, args

make_option = Option
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