muctab.py 74.7 KB
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"""
Module for the MucTab

A MucTab is a tab for multi-user chats as defined in XEP-0045.

It keeps track of many things such as part/joins, maintains an
user list, and updates private tabs when necessary.
"""

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import logging
log = logging.getLogger(__name__)

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import bisect
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import curses
import os
import random
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import re
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from datetime import datetime
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from poezio.tabs import ChatTab, Tab, SHOW_NAME
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from poezio import common
from poezio import fixes
from poezio import multiuserchat as muc
from poezio import timed_events
from poezio import windows
from poezio import xhtml
from poezio.common import safeJID
from poezio.config import config
from poezio.decorators import refresh_wrapper, command_args_parser
from poezio.logger import logger
from poezio.roster import roster
from poezio.theming import get_theme, dump_tuple
from poezio.user import User
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from poezio.core.structs import Completion, Status
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NS_MUC_USER = 'http://jabber.org/protocol/muc#user'
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STATUS_XPATH = '{%s}x/{%s}status' % (NS_MUC_USER, NS_MUC_USER)
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class MucTab(ChatTab):
    """
    The tab containing a multi-user-chat room.
    It contains an userlist, an input, a topic, an information and a chat zone
    """
    message_type = 'groupchat'
    plugin_commands = {}
    plugin_keys = {}
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    def __init__(self, core, jid, nick, password=None):
        ChatTab.__init__(self, core, jid)
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        self.joined = False
        self._state = 'disconnected'
        # our nick in the MUC
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        self.own_nick = nick
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        # self User object
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        self.own_user = None
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        self.name = jid
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        self.password = password
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        # buffered presences
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        self.presence_buffer = []
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        # userlist
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        self.users = []
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        # private conversations
        self.privates = []
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        self.topic = ''
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        self.topic_from = ''
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        # We send active, composing and paused states to the MUC because
        # the chatstate may or may not be filtered by the MUC,
        # that’s not our problem.
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        self.remote_wants_chatstates = True
        # Self ping event, so we can cancel it when we leave the room
        self.self_ping_event = None
        # UI stuff
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        self.topic_win = windows.Topic()
        self.text_win = windows.TextWin()
        self._text_buffer.add_window(self.text_win)
        self.v_separator = windows.VerticalSeparator()
        self.user_win = windows.UserList()
        self.info_header = windows.MucInfoWin()
        self.input = windows.MessageInput()
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        # List of ignored users
        self.ignores = []
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        # keys
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        self.register_keys()
        self.update_keys()
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        # commands
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        self.register_commands()
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        self.update_commands()
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        self.resize()
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    @property
    def general_jid(self):
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        return self.name
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    def check_send_chat_state(self):
        "If we should send a chat state"
        return self.joined

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    @property
    def last_connection(self):
        last_message = self._text_buffer.last_message
        if last_message:
            return last_message.time
        return None

    def scroll_user_list_down(self):
        self.user_win.scroll_down()
        self.user_win.refresh(self.users)
        self.input.refresh()

    def cancel_config(self, form):
        """
        The user do not want to send his/her config, send an iq cancel
        """
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        muc.cancel_config(self.core.xmpp, self.name)
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        self.core.close_tab()

    def send_config(self, form):
        """
        The user sends his/her config to the server
        """
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        muc.configure_room(self.core.xmpp, self.name, form)
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        self.core.close_tab()

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    def join(self):
        """
        Join the room
        """
        status = self.core.get_status()
        if self.last_connection:
            delta = datetime.now() - self.last_connection
            seconds = delta.seconds + delta.days * 24 * 3600
        else:
            seconds = 0
        muc.join_groupchat(self.core, self.name, self.own_nick,
                           self.password,
                           status=status.message,
                           show=status.show,
                           seconds=seconds)
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    def leave_room(self, message):
        if self.joined:
            info_col = dump_tuple(get_theme().COLOR_INFORMATION_TEXT)
            char_quit = get_theme().CHAR_QUIT
            spec_col = dump_tuple(get_theme().COLOR_QUIT_CHAR)
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            if config.get_by_tabname('display_user_color_in_join_part',
                                     self.general_jid):
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                color = dump_tuple(get_theme().COLOR_OWN_NICK)
            else:
                color = 3

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            if message:
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                msg = ('\x19%(color_spec)s}%(spec)s\x19%(info_col)s} '
                       'You (\x19%(color)s}%(nick)s\x19%(info_col)s})'
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                       ' left the room'
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                       ' (\x19o%(reason)s\x19%(info_col)s})') % {
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                           'info_col': info_col, 'reason': message,
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                           'spec': char_quit, 'color': color,
                           'color_spec': spec_col,
                           'nick': self.own_nick,
                       }
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            else:
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                msg = ('\x19%(color_spec)s}%(spec)s\x19%(info_col)s} '
                       'You (\x19%(color)s}%(nick)s\x19%(info_col)s})'
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                       ' left the room') % {
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                           'info_col': info_col,
                           'spec': char_quit, 'color': color,
                           'color_spec': spec_col,
                           'nick': self.own_nick,
                       }
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            self.add_message(msg, typ=2)
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            self.disconnect()
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            muc.leave_groupchat(self.core.xmpp, self.name, self.own_nick, message)
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            self.core.disable_private_tabs(self.name, reason=msg)
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        else:
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            muc.leave_groupchat(self.core.xmpp, self.name, self.own_nick, message)

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    def change_affiliation(self, nick_or_jid, affiliation, reason=''):
        """
        Change the affiliation of a nick or JID
        """
        def callback(iq):
            if iq['type'] == 'error':
                self.core.information("Could not set affiliation '%s' for '%s'." % (
                    affiliation, nick_or_jid), "Warning")
        if not self.joined:
            return

        valid_affiliations = ('outcast', 'none', 'member', 'admin', 'owner')
        if affiliation not in valid_affiliations:
            return self.core.information('The affiliation must be one of ' + ', '.join(valid_affiliations),
                                         'Error')
        if nick_or_jid in [user.nick for user in self.users]:
            res = muc.set_user_affiliation(self.core.xmpp, self.name,
                                           affiliation, nick=nick_or_jid,
                                           callback=callback, reason=reason)
        else:
            res = muc.set_user_affiliation(self.core.xmpp, self.name,
                                           affiliation, jid=safeJID(nick_or_jid),
                                           callback=callback, reason=reason)

    def change_role(self, nick, role, reason=''):
        """
        Change the role of a nick
        """
        def callback(iq):
            if iq['type'] == 'error':
                self.core.information("Could not set role '%s' for '%s'." % (
                    role, nick), "Warning")
        valid_roles = ('none', 'visitor', 'participant', 'moderator')

        if not self.joined or role not in valid_roles:
            return self.core.information('The role must be one of ' + ', '.join(valid_roles),
                                         'Error')

        if not safeJID(self.name + '/' + nick):
            return self.core.information('Invalid nick', 'Info')
        muc.set_user_role(self.core.xmpp, self.name, nick, reason, role,
                          callback=callback)

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    @refresh_wrapper.conditional
    def print_info(self, nick):
        """Print information about a user"""
        user = self.get_user_by_name(nick)
        if not user:
            return False

        theme = get_theme()
        inf = '\x19' + dump_tuple(theme.COLOR_INFORMATION_TEXT) + '}'
        if user.jid:
            user_jid = '%s (\x19%s}%s\x19o%s)' % (
                            inf,
                            dump_tuple(theme.COLOR_MUC_JID),
                            user.jid,
                            inf)
        else:
            user_jid = ''
        info = ('\x19%(user_col)s}%(nick)s\x19o%(jid)s%(info)s: show: '
                '\x19%(show_col)s}%(show)s\x19o%(info)s, affiliation: '
                '\x19%(role_col)s}%(affiliation)s\x19o%(info)s, role: '
                '\x19%(role_col)s}%(role)s\x19o%(status)s') % {
                        'user_col': dump_tuple(user.color),
                        'nick': nick,
                        'jid': user_jid,
                        'info': inf,
                        'show_col': dump_tuple(theme.color_show(user.show)),
                        'show': user.show or 'Available',
                        'role_col': dump_tuple(theme.color_role(user.role)),
                        'affiliation': user.affiliation or 'None',
                        'role': user.role or 'None',
                        'status': '\n%s' % user.status if user.status else ''}
        self.add_message(info, typ=0)
        return True

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    def on_input(self, key, raw):
        if not raw and key in self.key_func:
            self.key_func[key]()
            return False
        self.input.do_command(key, raw=raw)
        empty_after = self.input.get_text() == ''
        empty_after = empty_after or (self.input.get_text().startswith('/')
                                      and not
                                      self.input.get_text().startswith('//'))
        self.send_composing_chat_state(empty_after)
        return False
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    def get_nick(self):
        if not config.get('show_muc_jid'):
            return safeJID(self.name).user
        return self.name
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    def get_text_window(self):
        return self.text_win
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    def on_lose_focus(self):
        if self.joined:
            if self.input.text:
                self.state = 'nonempty'
            else:
                self.state = 'normal'
        else:
            self.state = 'disconnected'
        self.text_win.remove_line_separator()
        self.text_win.add_line_separator(self._text_buffer)
        if config.get_by_tabname('send_chat_states', self.general_jid):
            self.send_chat_state('inactive')
        self.check_scrolled()

    def on_gain_focus(self):
        self.state = 'current'
        if (self.text_win.built_lines and self.text_win.built_lines[-1] is None
                and not config.get('show_useless_separator')):
            self.text_win.remove_line_separator()
        curses.curs_set(1)
        if self.joined and config.get_by_tabname('send_chat_states',
                self.general_jid) and not self.input.get_text():
            self.send_chat_state('active')

    def handle_presence(self, presence):
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        """
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        Handle MUC presence
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        """
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        status_codes = set()
        for status_code in presence.xml.findall(STATUS_XPATH):
            status_codes.add(status_code.attrib['code'])
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        if presence['type'] == 'error':
            self.core.room_error(presence, self.name)
        elif not self.joined:
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            if '110' in status_codes:
               self.process_presence_buffer(presence)
            else:
                self.presence_buffer.append(presence)
                return
        else:
            try:
                self.handle_presence_joined(presence, status_codes)
            except PresenceError:
                self.core.room_error(presence, presence['from'].bare)
        if self.core.current_tab() is self:
            self.text_win.refresh()
            self.user_win.refresh_if_changed(self.users)
            self.info_header.refresh(self, self.text_win, user=self.own_user)
            self.input.refresh()
            self.core.doupdate()
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    def process_presence_buffer(self, last_presence):
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        """
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        Batch-process all the initial presences
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        """
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        deterministic = config.get_by_tabname('deterministic_nick_colors', self.name)
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        for stanza in self.presence_buffer:
            try:
                self.handle_presence_unjoined(stanza, deterministic)
            except PresenceError:
                self.core.room_error(stanza, stanza['from'].bare)
        self.handle_presence_unjoined(last_presence, deterministic, own=True)
        self.users.sort()
        # Enable the self ping event, to regularly check if we
        # are still in the room.
        self.enable_self_ping_event()
        if self.core.current_tab() is not self:
            self.refresh_tab_win()
            self.core.current_tab().input.refresh()
            self.core.doupdate()
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    def handle_presence_unjoined(self, presence, deterministic, own=False):
        """
        Presence received while we are not in the room (before code=110)
        """
        from_nick, from_room, affiliation, show, status, role, jid, typ = dissect_presence(presence)
        user_color = self.search_for_color(from_nick)
        new_user = User(from_nick, affiliation, show,
                        status, role, jid, deterministic, user_color)
        self.users.append(new_user)
        self.core.events.trigger('muc_join', presence, self)
        if own:
            status_codes = set()
            for status_code in presence.xml.findall(STATUS_XPATH):
                status_codes.add(status_code.attrib['code'])
            self.own_join(from_nick, new_user, status_codes)
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    def own_join(self, from_nick, new_user, status_codes):
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        """
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        Handle the last presence we received, entering the room
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        """
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        self.own_nick = from_nick
        self.own_user = new_user
        self.joined = True
        if self.name in self.core.initial_joins:
            self.core.initial_joins.remove(self.name)
            self._state = 'normal'
        elif self != self.core.current_tab():
            self._state = 'joined'
        if (self.core.current_tab() is self
                and self.core.status.show not in ('xa', 'away')):
            self.send_chat_state('active')
        new_user.color = get_theme().COLOR_OWN_NICK
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        if config.get_by_tabname('display_user_color_in_join_part',
                                 self.general_jid):
            color = dump_tuple(new_user.color)
        else:
            color = 3
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        info_col = dump_tuple(get_theme().COLOR_INFORMATION_TEXT)
        warn_col = dump_tuple(get_theme().COLOR_WARNING_TEXT)
        spec_col = dump_tuple(get_theme().COLOR_JOIN_CHAR)
        enable_message = (
            '\x19%(color_spec)s}%(spec)s\x19%(info_col)s} You '
            '(\x19%(nick_col)s}%(nick)s\x19%(info_col)s}) joined'
            ' the room') % {
                'nick': from_nick,
                'spec': get_theme().CHAR_JOIN,
                'color_spec': spec_col,
                'nick_col': color,
                'info_col': info_col,
                }
        self.add_message(enable_message, typ=2)
        self.core.enable_private_tabs(self.name, enable_message)
        if '201' in status_codes:
            self.add_message(
                    '\x19%(info_col)s}Info: The room '
                    'has been created' %
                       {'info_col': info_col},
                typ=0)
        if '170' in status_codes:
            self.add_message(
                    '\x19%(warn_col)s}Warning:\x19%(info_col)s}'
                    ' This room is publicly logged' %
                        {'info_col': info_col,
                         'warn_col': warn_col},
                typ=0)
        if '100' in status_codes:
            self.add_message(
                    '\x19%(warn_col)s}Warning:\x19%(info_col)s}'
                    ' This room is not anonymous.' %
                        {'info_col': info_col,
                         'warn_col': warn_col},
                typ=0)
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    def handle_presence_joined(self, presence, status_codes):
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        """
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        Handle new presences when we are already in the room
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        """
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        from_nick, from_room, affiliation, show, status, role, jid, typ = dissect_presence(presence)
        change_nick = '303' in status_codes
        kick = '307' in status_codes and typ == 'unavailable'
        ban = '301' in status_codes and typ == 'unavailable'
        shutdown = '332' in status_codes and typ == 'unavailable'
        non_member = '322' in status_codes and typ == 'unavailable'
        user = self.get_user_by_name(from_nick)
        # New user
        if not user and typ != "unavailable":
            user_color = self.search_for_color(from_nick)
            self.core.events.trigger('muc_join', presence, self)
            self.on_user_join(from_nick, affiliation, show, status, role,
                              jid, user_color)
        elif user is None:
            log.error('BUG: User %s in %s is None', from_nick, self.name)
            return
        elif change_nick:
            self.core.events.trigger('muc_nickchange', presence, self)
            self.on_user_nick_change(presence, user, from_nick, from_room)
        elif ban:
            self.core.events.trigger('muc_ban', presence, self)
            self.core.on_user_left_private_conversation(from_room,
                                                        user, status)
            self.on_user_banned(presence, user, from_nick)
        elif kick:
            self.core.events.trigger('muc_kick', presence, self)
            self.core.on_user_left_private_conversation(from_room,
                                                        user, status)
            self.on_user_kicked(presence, user, from_nick)
        elif shutdown:
            self.core.events.trigger('muc_shutdown', presence, self)
            self.on_muc_shutdown()
        elif non_member:
            self.core.events.trigger('muc_shutdown', presence, self)
            self.on_non_member_kicked()
        # user quit
        elif typ == 'unavailable':
            self.on_user_leave_groupchat(user, jid, status,
                                         from_nick, from_room)
        # status change
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        else:
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            self.on_user_change_status(user, from_nick, from_room,
                                       affiliation, role, show, status)
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    def on_non_member_kicked(self):
        """We have been kicked because the MUC is members-only"""
        self.add_message(
                '\x19%(info_col)s}You have been kicked because you '
                'are not a member and the room is now members-only.' % {
            'info_col': dump_tuple(get_theme().COLOR_INFORMATION_TEXT)},
            typ=2)
        self.disconnect()

    def on_muc_shutdown(self):
        """We have been kicked because the MUC service is shutting down"""
        self.add_message(
                '\x19%(info_col)s}You have been kicked because the'
                ' MUC service is shutting down.' % {
            'info_col': dump_tuple(get_theme().COLOR_INFORMATION_TEXT)},
            typ=2)
        self.disconnect()

    def on_user_join(self, from_nick, affiliation, show, status, role, jid, color):
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        """
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        When a new user joins the groupchat
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        """
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        deterministic = config.get_by_tabname('deterministic_nick_colors', self.name)
        user = User(from_nick, affiliation,
                    show, status, role, jid, deterministic, color)
        bisect.insort_left(self.users, user)
        hide_exit_join = config.get_by_tabname('hide_exit_join',
                                               self.general_jid)
        if hide_exit_join != 0:
            if config.get_by_tabname('display_user_color_in_join_part',
                                     self.general_jid):
                color = dump_tuple(user.color)
            else:
                color = 3
            info_col = dump_tuple(get_theme().COLOR_INFORMATION_TEXT)
            spec_col = dump_tuple(get_theme().COLOR_JOIN_CHAR)
            char_join = get_theme().CHAR_JOIN
            if not jid.full:
                msg = ('\x19%(color_spec)s}%(spec)s \x19%(color)s}%(nick)s'
                       '\x19%(info_col)s} joined the room') % {
                            'nick': from_nick, 'spec': char_join,
                            'color': color,
                            'info_col': info_col,
                            'color_spec': spec_col,
                            }
            else:
                msg = ('\x19%(color_spec)s}%(spec)s \x19%(color)s}%(nick)s'
                       '\x19%(info_col)s} (\x19%(jid_color)s}%(jid)s\x19'
                       '%(info_col)s}) joined the room') % {
                            'spec': char_join, 'nick': from_nick,
                            'color':color, 'jid':jid.full,
                            'info_col': info_col,
                            'jid_color': dump_tuple(get_theme().COLOR_MUC_JID),
                            'color_spec': spec_col,
                            }
            self.add_message(msg, typ=2)
        self.core.on_user_rejoined_private_conversation(self.name, from_nick)

    def on_user_nick_change(self, presence, user, from_nick, from_room):
        new_nick = presence.xml.find('{%s}x/{%s}item' % (NS_MUC_USER, NS_MUC_USER)
                                     ).attrib['nick']
        if user.nick == self.own_nick:
            self.own_nick = new_nick
            # also change our nick in all private discussions of this room
            self.core.handler.on_muc_own_nickchange(self)
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        else:
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            color = config.get_by_tabname(new_nick, 'muc_colors')
            if color != '':
                deterministic = config.get_by_tabname('deterministic_nick_colors',
                                                      self.name)
                user.change_color(color, deterministic)
        user.change_nick(new_nick)
        self.users.remove(user)
        bisect.insort_left(self.users, user)
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        if config.get_by_tabname('display_user_color_in_join_part',
                                 self.general_jid):
            color = dump_tuple(user.color)
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        else:
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            color = 3
        info_col = dump_tuple(get_theme().COLOR_INFORMATION_TEXT)
        self.add_message('\x19%(color)s}%(old)s\x19%(info_col)s} is'
                         ' now known as \x19%(color)s}%(new)s' % {
                              'old':from_nick, 'new':new_nick,
                              'color':color, 'info_col': info_col},
                         typ=2)
        # rename the private tabs if needed
        self.core.rename_private_tabs(self.name, from_nick, user)
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    def on_user_banned(self, presence, user, from_nick):
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        """
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        When someone is banned from a muc
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        """
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        self.users.remove(user)
        by = presence.xml.find('{%s}x/{%s}item/{%s}actor' %
                               (NS_MUC_USER, NS_MUC_USER, NS_MUC_USER))
        reason = presence.xml.find('{%s}x/{%s}item/{%s}reason' %
                                   (NS_MUC_USER, NS_MUC_USER, NS_MUC_USER))
        if by:
            by = by.get('jid') or by.get('nick') or None
        else:
            by = None
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        info_col = dump_tuple(get_theme().COLOR_INFORMATION_TEXT)
        char_kick = get_theme().CHAR_KICK
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        if from_nick == self.own_nick: # we are banned
            if by:
                kick_msg = ('\x191}%(spec)s \x193}You\x19%(info_col)s}'
                            ' have been banned by \x194}%(by)s') % {
                                'spec': char_kick, 'by': by,
                                'info_col': info_col}
            else:
                kick_msg = ('\x191}%(spec)s \x193}You\x19'
                            '%(info_col)s} have been banned.') % {
                                'spec': char_kick, 'info_col': info_col}
            self.core.disable_private_tabs(self.name, reason=kick_msg)
            self.disconnect()
            self.refresh_tab_win()
            self.core.current_tab().input.refresh()
            self.core.doupdate()
            if config.get_by_tabname('autorejoin', self.general_jid):
                delay = config.get_by_tabname('autorejoin_delay',
                                              self.general_jid)
                delay = common.parse_str_to_secs(delay)
                if delay <= 0:
                    muc.join_groupchat(self.core, self.name, self.own_nick)
                else:
                    self.core.add_timed_event(timed_events.DelayedEvent(
                                                  delay,
                                                  muc.join_groupchat,
                                                  self.core,
                                                  self.name,
                                                  self.own_nick))
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        else:
            if config.get_by_tabname('display_user_color_in_join_part',
                                     self.general_jid):
                color = dump_tuple(user.color)
            else:
                color = 3

            if by:
                kick_msg = ('\x191}%(spec)s \x19%(color)s}'
                            '%(nick)s\x19%(info_col)s} '
                            'has been banned by \x194}%(by)s') % {
                                'spec': char_kick, 'nick': from_nick,
                                'color': color, 'by': by,
                                'info_col': info_col}
            else:
                kick_msg = ('\x191}%(spec)s \x19%(color)s}%(nick)s'
                            '\x19%(info_col)s} has been banned') % {
                                'spec': char_kick, 'nick': from_nick,
                                'color': color, 'info_col': info_col}
        if reason is not None and reason.text:
            kick_msg += ('\x19%(info_col)s} Reason: \x196}'
                         '%(reason)s\x19%(info_col)s}') % {
                            'reason': reason.text, 'info_col': info_col}
        self.add_message(kick_msg, typ=2)

    def on_user_kicked(self, presence, user, from_nick):
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        """
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        When someone is kicked from a muc
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        """
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        self.users.remove(user)
        actor_elem = presence.xml.find('{%s}x/{%s}item/{%s}actor' %
                                       (NS_MUC_USER, NS_MUC_USER, NS_MUC_USER))
        reason = presence.xml.find('{%s}x/{%s}item/{%s}reason' %
                                   (NS_MUC_USER, NS_MUC_USER, NS_MUC_USER))
        by = None
        info_col = dump_tuple(get_theme().COLOR_INFORMATION_TEXT)
        char_kick = get_theme().CHAR_KICK
        if actor_elem is not None:
            by = actor_elem.get('nick') or actor_elem.get('jid')
        if from_nick == self.own_nick: # we are kicked
            if by:
                kick_msg = ('\x191}%(spec)s \x193}You\x19'
                            '%(info_col)s} have been kicked'
                            ' by \x193}%(by)s') % {
                                 'spec': char_kick, 'by': by,
                                 'info_col': info_col}
            else:
                kick_msg = ('\x191}%(spec)s \x193}You\x19%(info_col)s}'
                            ' have been kicked.') % {
                                 'spec': char_kick,
                                 'info_col': info_col}
            self.core.disable_private_tabs(self.name, reason=kick_msg)
            self.disconnect()
            self.refresh_tab_win()
            self.core.current_tab().input.refresh()
            self.core.doupdate()
            # try to auto-rejoin
            if config.get_by_tabname('autorejoin', self.general_jid):
                delay = config.get_by_tabname('autorejoin_delay',
                                              self.general_jid)
                delay = common.parse_str_to_secs(delay)
                if delay <= 0:
                    muc.join_groupchat(self.core, self.name, self.own_nick)
                else:
                    self.core.add_timed_event(timed_events.DelayedEvent(
                        delay,
                        muc.join_groupchat,
                        self.core,
                        self.name,
                        self.own_nick))
        else:
            if config.get_by_tabname('display_user_color_in_join_part',
                                     self.general_jid):
                color = dump_tuple(user.color)
            else:
                color = 3
            if by:
                kick_msg = ('\x191}%(spec)s \x19%(color)s}%(nick)s'
                            '\x19%(info_col)s} has been kicked by '
                            '\x193}%(by)s') % {
                                'spec': char_kick, 'nick':from_nick,
                                'color':color, 'by':by, 'info_col': info_col}
            else:
                kick_msg = ('\x191}%(spec)s \x19%(color)s}%(nick)s'
                            '\x19%(info_col)s} has been kicked') % {
                                'spec': char_kick, 'nick': from_nick,
                                'color':color, 'info_col': info_col}
        if reason is not None and reason.text:
            kick_msg += ('\x19%(info_col)s} Reason: \x196}'
                         '%(reason)s') % {
                            'reason': reason.text, 'info_col': info_col}
        self.add_message(kick_msg, typ=2)

    def on_user_leave_groupchat(self, user, jid, status, from_nick, from_room):
        """
        When an user leaves a groupchat
        """
        self.users.remove(user)
        if self.own_nick == user.nick:
            # We are now out of the room.
            # Happens with some buggy (? not sure) servers
            self.disconnect()
            self.core.disable_private_tabs(from_room)
            self.refresh_tab_win()

        hide_exit_join = config.get_by_tabname('hide_exit_join',
                                               self.general_jid)

        if hide_exit_join <= -1 or user.has_talked_since(hide_exit_join):
            if config.get_by_tabname('display_user_color_in_join_part',
                                     self.general_jid):
                color = dump_tuple(user.color)
            else:
                color = 3
            info_col = dump_tuple(get_theme().COLOR_INFORMATION_TEXT)
            spec_col = dump_tuple(get_theme().COLOR_QUIT_CHAR)

            if not jid.full:
                leave_msg = ('\x19%(color_spec)s}%(spec)s \x19%(color)s}'
                             '%(nick)s\x19%(info_col)s} has left the '
                             'room') % {
                                  'nick':from_nick, 'color':color,
                                  'spec':get_theme().CHAR_QUIT,
                                  'info_col': info_col,
                                  'color_spec': spec_col}
            else:
                jid_col = dump_tuple(get_theme().COLOR_MUC_JID)
                leave_msg = ('\x19%(color_spec)s}%(spec)s \x19%(color)s}'
                             '%(nick)s\x19%(info_col)s} (\x19%(jid_col)s}'
                             '%(jid)s\x19%(info_col)s}) has left the '
                             'room') % {
                                  'spec':get_theme().CHAR_QUIT,
                                  'nick':from_nick, 'color':color,
                                  'jid':jid.full, 'info_col': info_col,
                                  'color_spec': spec_col,
                                  'jid_col': jid_col}
            if status:
                leave_msg += ' (\x19o%s\x19%s})' % (status, info_col)
            self.add_message(leave_msg, typ=2)
        self.core.on_user_left_private_conversation(from_room, user,
                                                    status)

    def on_user_change_status(
            self, user, from_nick, from_room, affiliation, role, show, status):
        """
        When an user changes her status
        """
        # build the message
        display_message = False # flag to know if something significant enough
                                # to be displayed has changed
        if config.get_by_tabname('display_user_color_in_join_part',
                                 self.general_jid):
            color = dump_tuple(user.color)
        else:
            color = 3
        if from_nick == self.own_nick:
            msg = '\x19%(color)s}You\x19%(info_col)s} changed: ' % {
                  'info_col': dump_tuple(get_theme().COLOR_INFORMATION_TEXT),
                  'color': color}
        else:
            msg = '\x19%(color)s}%(nick)s\x19%(info_col)s} changed: ' % {
                  'nick': from_nick, 'color': color,
                  'info_col': dump_tuple(get_theme().COLOR_INFORMATION_TEXT)}
        if affiliation != user.affiliation:
            msg += 'affiliation: %s, ' % affiliation
            display_message = True
        if role != user.role:
            msg += 'role: %s, ' % role
            display_message = True
        if show != user.show and show in SHOW_NAME:
            msg += 'show: %s, ' % SHOW_NAME[show]
            display_message = True
        if status != user.status:
            # if the user sets his status to nothing
            if status:
                msg += 'status: %s, ' % status
                display_message = True
            elif show in SHOW_NAME and show == user.show:
                msg += 'show: %s, ' % SHOW_NAME[show]
                display_message = True
        if not display_message:
            return
        msg = msg[:-2] # remove the last ", "
        hide_status_change = config.get_by_tabname('hide_status_change',
                                                   self.general_jid)
        if hide_status_change < -1:
            hide_status_change = -1
        if ((hide_status_change == -1 or \
                user.has_talked_since(hide_status_change) or\
                user.nick == self.own_nick)\
                and\
                (affiliation != user.affiliation or\
                    role != user.role or\
                    show != user.show or\
                    status != user.status))\
                      or\
                        (affiliation != user.affiliation or\
                          role != user.role):
            # display the message in the room
            self._text_buffer.add_message(msg)
        self.core.on_user_changed_status_in_private('%s/%s' %
                                                      (from_room, from_nick),
                                                    Status(show, status))
        self.users.remove(user)
        # finally, effectively change the user status
        user.update(affiliation, show, status, role)
        bisect.insort_left(self.users, user)

    def disconnect(self):
        """
        Set the state of the room as not joined, so
        we can know if we can join it, send messages to it, etc
        """
        self.presence_buffer = []
        self.users = []
        if self is not self.core.current_tab():
            self.state = 'disconnected'
        self.joined = False
        self.disable_self_ping_event()

    def get_single_line_topic(self):
        """
        Return the topic as a single-line string (for the window header)
        """
        return self.topic.replace('\n', '|')

    def log_message(self, txt, nickname, time=None, typ=1):
        """
        Log the messages in the archives, if it needs
        to be
        """
        if time is None and self.joined:    # don't log the history messages
            if not logger.log_message(self.name, nickname, txt, typ=typ):
                self.core.information('Unable to write in the log file',
                                      'Error')

    def get_user_by_name(self, nick):
        """
        Gets the user associated with the given nick, or None if not found
        """
        for user in self.users:
            if user.nick == nick:
                return user
        return None

    def add_message(self, txt, time=None, nickname=None, **kwargs):
        """
        Note that user can be None even if nickname is not None. It happens
        when we receive an history message said by someone who is not
        in the room anymore
        Return True if the message highlighted us. False otherwise.
        """

        # reset self-ping interval
        if self.self_ping_event:
            self.enable_self_ping_event()

        self.log_message(txt, nickname, time=time, typ=kwargs.get('typ', 1))
        args = dict()
        for key, value in kwargs.items():
            if key not in ('typ', 'forced_user'):
                args[key] = value
        if nickname is not None:
            user = self.get_user_by_name(nickname)
        else:
            user = None

        if user:
            user.set_last_talked(datetime.now())
            args['user'] = user
        if not user and kwargs.get('forced_user'):
            args['user'] = kwargs['forced_user']

        if (not time and nickname and nickname != self.own_nick
                    and self.state != 'current'):
            if (self.state != 'highlight' and
                    config.get_by_tabname('notify_messages', self.name)):
                self.state = 'message'
        if time and not txt.startswith('/me'):
            txt = '\x19%(info_col)s}%(txt)s' % {
                    'txt': txt,
                    'info_col': dump_tuple(get_theme().COLOR_LOG_MSG)}
        elif not nickname:
            txt = '\x19%(info_col)s}%(txt)s' % {
                    'txt': txt,
                    'info_col': dump_tuple(get_theme().COLOR_INFORMATION_TEXT)}
        elif not kwargs.get('highlight'):                   # TODO
            args['highlight'] = self.do_highlight(txt, time, nickname)
        time = time or datetime.now()
        self._text_buffer.add_message(txt, time, nickname, **args)
        return args.get('highlight', False)
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    def modify_message(self, txt, old_id, new_id,
                       time=None, nickname=None, user=None, jid=None):
        self.log_message(txt, nickname, time=time, typ=1)
        highlight = self.do_highlight(txt, time, nickname, corrected=True)
        message = self._text_buffer.modify_message(txt, old_id, new_id,
                                                   highlight=highlight,
                                                   time=time, user=user,
                                                   jid=jid)
        if message:
            self.text_win.modify_message(old_id, message)
            return highlight
        return False
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    def matching_names(self):
        return [(1, safeJID(self.name).user), (3, self.name)]
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    def enable_self_ping_event(self):
        delay = config.get_by_tabname("self_ping_delay", self.general_jid, default=0)
        if delay <= 0:          # use 0 or some negative value to disable it
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            return
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        self.disable_self_ping_event()
        self.self_ping_event = timed_events.DelayedEvent(delay, self.send_self_ping)
        self.core.add_timed_event(self.self_ping_event)
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    def disable_self_ping_event(self):
        if self.self_ping_event is not None:
            self.core.remove_timed_event(self.self_ping_event)
            self.self_ping_event = None
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    def send_self_ping(self):
        to = self.name + "/" + self.own_nick
        self.core.xmpp.plugin['xep_0199'].send_ping(jid=to,
                                                    callback=self.on_self_ping_result,
                                                    timeout_callback=self.on_self_ping_failed,
                                                    timeout=60)
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    def on_self_ping_result(self, iq):
        if iq["type"] == "error" and iq["error"]["condition"] != "feature-not-implemented":
            self.command_cycle(iq["error"]["text"] or "not in this room")
            self.core.refresh_window()
        else:                   # Re-send a self-ping in a few seconds
            self.enable_self_ping_event()

    def search_for_color(self, nick):
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        """
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        Search for the color of a nick in the config file.
        Also, look at the colors of its possible aliases if nick_color_aliases
        is set.
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        """
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        color = config.get_by_tabname(nick, 'muc_colors')
        if color != '':
            return color
        nick_color_aliases = config.get_by_tabname('nick_color_aliases', self.name)
        if nick_color_aliases:
            nick_alias = re.sub('^_*(.*?)_*$', '\\1', nick)
            color = config.get_by_tabname(nick_alias, 'muc_colors')
        return color
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    def on_self_ping_failed(self, iq):
        self.command_cycle("the MUC server is not responding")
        self.core.refresh_window()
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########################## UI ONLY #####################################

    @refresh_wrapper.always
    def go_to_next_hl(self):
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        """
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        Go to the next HL in the room, or the last
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        """
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        self.text_win.next_highlight()
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    @refresh_wrapper.always
    def go_to_prev_hl(self):
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        """
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        Go to the previous HL in the room, or the first
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        """
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        self.text_win.previous_highlight()
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    def scroll_user_list_up(self):
        self.user_win.scroll_up()
        self.user_win.refresh(self.users)
        self.input.refresh()
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    def resize(self):
        """
        Resize the whole window. i.e. all its sub-windows
        """
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        self.need_resize = False
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        if config.get('hide_user_list') or self.size.tab_degrade_x:
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            text_width = self.width
        else:
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            text_width = (self.width // 10) * 9
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        if self.size.tab_degrade_y:
            tab_win_height = 0
            info_win_height = 0
        else:
            tab_win_height = Tab.tab_win_height()
            info_win_height = self.core.information_win_size
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        self.user_win.resize(self.height - 3 - info_win_height
                                - tab_win_height,
                             self.width - (self.width // 10) * 9 - 1,
                             1,
                             (self.width // 10) * 9 + 1)
        self.v_separator.resize(self.height - 3 - info_win_height - tab_win_height,
                                1, 1, 9 * (self.width // 10))

        self.topic_win.resize(1, self.width, 0, 0)

        self.text_win.resize(self.height - 3 - info_win_height
                                - tab_win_height,
                             text_width, 1, 0)
        self.text_win.rebuild_everything(self._text_buffer)
        self.info_header.resize(1, self.width,
                                self.height - 2 - info_win_height
                                    - tab_win_height,
                                0)
        self.input.resize(1, self.width, self.height-1, 0)

    def refresh(self):
        if self.need_resize:
            self.resize()
        log.debug('  TAB   Refresh: %s', self.__class__.__name__)
        if config.get('hide_user_list') or self.size.tab_degrade_x:
            display_user_list = False
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        else:
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            display_user_list = True
        display_info_win = not self.size.tab_degrade_y
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        self.topic_win.refresh(self.get_single_line_topic())
        self.text_win.refresh()
        if display_user_list:
            self.v_separator.refresh()
            self.user_win.refresh(self.users)
        self.info_header.refresh(self, self.text_win, user=self.own_user)
        self.refresh_tab_win()
        if display_info_win:
            self.info_win.refresh()
        self.input.refresh()
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    def on_info_win_size_changed(self):
        if self.core.information_win_size >= self.height-3:
            return
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        if config.get("hide_user_list"):
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            text_width = self.width
        else:
            text_width = (self.width//10)*9
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        self.user_win.resize(self.height - 3 - self.core.information_win_size
                                - Tab.tab_win_height(),
                             self.width - (self.width // 10) * 9 - 1,
                             1,
                             (self.width // 10) * 9 + 1)
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        self.v_separator.resize(self.height - 3 - self.core.information_win_size - Tab.tab_win_height(),
                                1, 1, 9 * (self.width // 10))
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        self.text_win.resize(self.height - 3 - self.core.information_win_size
                                - Tab.tab_win_height(),
                             text_width, 1, 0)
        self.info_header.resize(1, self.width,
                                self.height-2-self.core.information_win_size
                                    - Tab.tab_win_height(),
                                0)
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    def do_highlight(self, txt, time, nickname, corrected=False):
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        """
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        Set the tab color and returns the nick color
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        """
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        highlighted = False
        if (not time or corrected) and nickname and nickname != self.own_nick and self.joined:

            if re.search(r'\b' + self.own_nick.lower() + r'\b', txt.lower()):
                if self.state != 'current':
                    self.state = 'highlight'
                highlighted = True
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            else:
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                highlight_words = config.get_by_tabname('highlight_on',
                                                        self.general_jid)
                highlight_words = highlight_words.split(':')
                for word in highlight_words:
                    if word and word.lower() in txt.lower():
                        if self.state != 'current':
                            self.state = 'highlight'
                        highlighted = True
                        break
        if highlighted:
            beep_on = config.get('beep_on').split()
            if 'highlight' in beep_on and 'message' not in beep_on:
                if not config.get_by_tabname('disable_beep', self.name):
                    curses.beep()
        return highlighted

########################## COMMANDS ####################################

    @command_args_parser.quoted(1, 1, [''])
    def command_invite(self, args):
        """/invite <jid> [reason]"""
        if args is None:
            return self.core.command.help('invite')
        jid, reason = args
        self.core.command.invite('%s %s "%s"' % (jid, self.name, reason))

    @command_args_parser.quoted(1)
    def command_info(self, args):
        """
        /info <nick>
        """
        if args is None:
            return self.core.command.help('info')
        nick = args[0]
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        if not self.print_info(nick):
            self.core.information("Unknown user: %s" % nick, "Error")
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    @command_args_parser.quoted(0)
    def command_configure(self, ignored):
        """
        /configure
        """
        def on_form_received(form):
            if not form:
                self.core.information(
                    'Could not retrieve the configuration form',
                    'Error')
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                return
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            self.core.open_new_form(form, self.cancel_config, self.send_config)

        fixes.get_room_form(self.core.xmpp, self.name, on_form_received)

    @command_args_parser.raw
    def command_cycle(self, msg):
        """/cycle [reason]"""
        self.leave_room(msg)
        self.join()

    @command_args_parser.quoted(0, 1, [''])
    def command_recolor(self, args):
        """
        /recolor [random]
        Re-assign color to the participants of the room
        """
        deterministic = config.get_by_tabname('deterministic_nick_colors', self.name)
        if deterministic:
            for user in self.users:
                if user.nick == self.own_nick:
                    continue
                color = self.search_for_color(user.nick)
                if color != '':
                    continue
                user.set_deterministic_color()
            if args[0] == 'random':
                self.core.information('"random" was provided, but poezio is '
                                      'configured to use deterministic colors',
                                      'Warning')
            self.user_win.refresh(self.users)
            self.input.refresh()
            return
        compare_users = lambda x: x.last_talked
        users = list(self.users)
        sorted_users = sorted(users, key=compare_users, reverse=True)
        full_sorted_users = sorted_users[:]
        # search our own user, to remove it from the list
        # Also remove users whose color is fixed
        for user in full_sorted_users:
            color = self.search_for_color(user.nick)
            if user.nick == self.own_nick:
                sorted_users.remove(user)
                user.color = get_theme().COLOR_OWN_NICK
            elif color != '':
                sorted_users.remove(user)
                user.change_color(color, deterministic)
        colors = list(get_theme().LIST_COLOR_NICKNAMES)
        if args[0] == 'random':
            random.shuffle(colors)
        for i, user in enumerate(sorted_users):
            user.color = colors[i % len(colors)]
        self.text_win.rebuild_everything(self._text_buffer)
        self.user_win.refresh(self.users)
        self.text_win.refresh()
        self.input.refresh()

    @command_args_parser.quoted(2, 2, [''])
    def command_color(self, args):
        """
        /color <nick> <color>
        Fix a color for a nick.
        Use "unset" instead of a color to remove the attribution.
        User "random" to attribute a random color.
        """
        if args is None:
            return self.core.command.help('color')
        nick = args[0]
        color = args[1].lower()
        user = self.get_user_by_name(nick)
        if color not in xhtml.colors and color not in ('unset', 'random'):
            return self.core.information("Unknown color: %s" % color, 'Error')
        if user and user.nick == self.own_nick:
            return self.core.information("You cannot change the color of your"
                                         " own nick.", 'Error')
        if color == 'unset':
            if config.remove_and_save(nick, 'muc_colors'):
                self.core.information('Color for nick %s unset' % (nick))
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        else:
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            if color == 'random':
                color = random.choice(list(xhtml.colors))
            if user:
                user.change_color(color)
            config.set_and_save(nick, color, 'muc_colors')
            nick_color_aliases = config.get_by_tabname('nick_color_aliases', self.name)
            if nick_color_aliases:
                # if any user in the room has a nick which is an alias of the
                # nick, update its color
                for tab in self.core.get_tabs(MucTab):
                    for u in tab.users:
                        nick_alias = re.sub('^_*', '', u.nick)
                        nick_alias = re.sub('_*$', '', nick_alias)
                        if nick_alias == nick:
                            u.change_color(color)
            self.text_win.rebuild_everything(self._text_buffer)
            self.user_win.refresh(self.users)
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            self.text_win.refresh()
            self.input.refresh()

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    @command_args_parser.quoted(1)
    def command_version(self, args):
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        """
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        /version <jid or nick>
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        """
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        def callback(res):
            if not res:
                return self.core.information('Could not get the software '
                                             'version from %s' % (jid,),
                                             'Warning')
            version = '%s is running %s version %s on %s' % (
                         jid,
                         res.get('name') or 'an unknown software',
                         res.get('version') or 'unknown',
                         res.get('os') or 'an unknown platform')
            self.core.information(version, 'Info')
        if args is None:
            return self.core.command.help('version')
        nick = args[0]
        if nick in [user.nick for user in self.users]:
            jid = safeJID(self.name).bare
            jid = safeJID(jid + '/' + nick)
        else:
            jid = safeJID(nick)
        fixes.get_version(self.core.xmpp, jid,
                          callback=callback)
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    @command_args_parser.quoted(1)
    def command_nick(self, args):
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        """
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        /nick <nickname>
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        """
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        if args is None:
            return self.core.command.help('nick')
        nick = args[0]
        if not self.joined:
            return self.core.information('/nick only works in joined rooms',
                                         'Info')
        current_status = self.core.get_status()
        if not safeJID(self.name + '/' + nick):
            return self.core.information('Invalid nick', 'Info')
        muc.change_nick(self.core, self.name, nick,
                        current_status.message,
                        current_status.show)
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    @command_args_parser.quoted(0, 1, [''])
    def command_part(self, args):
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        """
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        /part [msg]
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        """
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        message = args[0]
        self.leave_room(message)
        if self == self.core.current_tab():
            self.refresh()
        self.core.doupdate()
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    @command_args_parser.raw
    def command_close(self, msg):
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        """
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        /close [msg]
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        """
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        self.command_part(msg)
        self.core.close_tab(self)
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    def on_close(self):
        super().on_close()
        self.command_part('')
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    @command_args_parser.quoted(1, 1)
    def command_query(self, args):
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        """
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        /query <nick> [message]
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        """
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        if args is None:
            return  self.core.command.help('query')
        nick = args[0]
        r = None
        for user in self.users:
            if user.nick == nick:
                r = self.core.open_private_window(self.name, user.nick)
        if r and len(args) == 2:
            msg = args[1]
            self.core.current_tab().command_say(
                    xhtml.convert_simple_to_full_colors(msg))
        if not r:
            self.core.information("Cannot find user: %s" % nick, 'Error')

    @command_args_parser.raw
    def command_topic(self, subject):
        """
        /topic [new topic]
        """
        if not subject:
            info_text = dump_tuple(get_theme().COLOR_INFORMATION_TEXT)
            norm_text = dump_tuple(get_theme().COLOR_NORMAL_TEXT)
            if self.topic_from:
                user = self.get_user_by_name(self.topic_from)
                if user:
                    user_text = dump_tuple(user.color)
                    user_string = '\x19%s}(set by \x19%s}%s\x19%s})' % (
                            info_text, user_text, user.nick, info_text)
                else:
                    user_string = self.topic_from
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            else:
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                user_string = ''
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            self._text_buffer.add_message(
                    "\x19%s}The subject of the room is: \x19%s}%s %s" %
                        (info_text, norm_text, self.topic, user_string))
            self.refresh()
            return
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        muc.change_subject(self.core.xmpp, self.name, subject)
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    @command_args_parser.quoted(0)
    def command_names(self, args):
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        """
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        /names
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        """
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        if not self.joined:
            return
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        aff = {
                'owner': get_theme().CHAR_AFFILIATION_OWNER,
                'admin': get_theme().CHAR_AFFILIATION_ADMIN,
                'member': get_theme().CHAR_AFFILIATION_MEMBER,
                'none': get_theme().CHAR_AFFILIATION_NONE,
                }
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        colors = {}
        colors["visitor"] = dump_tuple(get_theme().COLOR_USER_VISITOR)
        colors["moderator"] = dump_tuple(get_theme().COLOR_USER_MODERATOR)
        colors["participant"] = dump_tuple(get_theme().COLOR_USER_PARTICIPANT)
        color_other = dump_tuple(get_theme().COLOR_USER_NONE)
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        buff = ['Users: %s \n' % len(self.users)]
        for user in self.users:
            affiliation = aff.get(user.affiliation,
                                  get_theme().CHAR_AFFILIATION_NONE)
            color = colors.get(user.role, color_other)
            buff.append('\x19%s}%s\x19o\x19%s}%s\x19o' % (
                color, affiliation, dump_tuple(user.color), user.nick))
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        buff.append('\n')
        message = ' '.join(buff)
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