core.py 51.9 KB
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# Copyright 2010-2011 Le Coz Florent <louiz@louiz.org>
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#
# This file is part of Poezio.
#
# Poezio is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, version 3 of the License.
#
# Poezio 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Poezio.  If not, see <http://www.gnu.org/licenses/>.

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from gettext import (bindtextdomain, textdomain, bind_textdomain_codeset,
                     gettext as _)
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from os.path import isfile
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from time import sleep

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import os
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import re
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import sys
import shlex
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import curses
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import threading
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import traceback
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from datetime import datetime
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import common
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import theme
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import logging

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from sleekxmpp.xmlstream.stanzabase import JID

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log = logging.getLogger(__name__)
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import multiuserchat as muc
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import tabs
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import windows
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from connection import connection
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from config import config
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from logger import logger
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from user import User
from room import Room
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from roster import Roster, RosterGroup, roster
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from contact import Contact, Resource
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from text_buffer import TextBuffer
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from keyboard import read_char
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# http://xmpp.org/extensions/xep-0045.html#errorstatus
ERROR_AND_STATUS_CODES = {
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    '401': _('A password is required'),
    '403': _('You are banned from the room'),
    '404': _('The room does\'nt exist'),
    '405': _('Your are not allowed to create a new room'),
    '406': _('A reserved nick must be used'),
    '407': _('You are not in the member list'),
    '409': _('This nickname is already in use or has been reserved'),
    '503': _('The maximum number of users has been reached'),
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    }

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SHOW_NAME = {
    'dnd': _('busy'),
    'away': _('away'),
    'xa': _('not available'),
    'chat': _('chatty'),
    '': _('available')
    }
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resize_lock = threading.Lock()

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class Core(object):
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    """
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    User interface using ncurses
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    """
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    def __init__(self, xmpp):
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        # All uncaught exception are given to this callback, instead
        # of being displayed on the screen and exiting the program.
        sys.excepthook = self.on_exception
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        self.running = True
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        self.stdscr = curses.initscr()
        self.init_curses(self.stdscr)
        self.xmpp = xmpp
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        # a unique buffer used to store global informations
        # that are displayed in almost all tabs, in an
        # information window.
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        self.information_buffer = TextBuffer()
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        self.information_win_size = config.get('info_win_height', 2, 'var')
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        default_tab = tabs.InfoTab(self) if self.xmpp.anon\
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            else tabs.RosterInfoTab(self)
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        default_tab.on_gain_focus()
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        self.tabs = [default_tab]
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        self.resize_timer = None
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        self.previous_tab_nb = 0
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        self.own_nick = config.get('own_nick', '') or self.xmpp.boundjid.user
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        # global commands, available from all tabs
        # a command is tuple of the form:
        # (the function executing the command. Takes a string as argument,
        #  a string representing the help message,
        #  a completion function, taking a Input as argument. Can be None)
        #  The completion function should return True if a completion was
        #  made ; False otherwise
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        self.commands = {
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            'help': (self.command_help, '\_o< KOIN KOIN KOIN', None),
            'join': (self.command_join, _("Usage: /join [room_name][@server][/nick] [password]\nJoin: Join the specified room. You can specify a nickname after a slash (/). If no nickname is specified, you will use the default_nick in the configuration file. You can omit the room name: you will then join the room you\'re looking at (useful if you were kicked). You can also provide a room_name without specifying a server, the server of the room you're currently in will be used. You can also provide a password to join the room.\nExamples:\n/join room@server.tld\n/join room@server.tld/John\n/join room2\n/join /me_again\n/join\n/join room@server.tld/my_nick password\n/join / password"), self.completion_join),
            'exit': (self.command_quit, _("Usage: /exit\nExit: Just disconnect from the server and exit poezio."), None),
            'next': (self.rotate_rooms_right, _("Usage: /next\nNext: Go to the next room."), None),
            'n': (self.rotate_rooms_right, _("Usage: /n\nN: Go to the next room."), None),
            'prev': (self.rotate_rooms_left, _("Usage: /prev\nPrev: Go to the previous room."), None),
            'p': (self.rotate_rooms_left, _("Usage: /p\nP: Go to the previous room."), None),
            'win': (self.command_win, _("Usage: /win <number>\nWin: Go to the specified room."), None),
            'w': (self.command_win, _("Usage: /w <number>\nW: Go to the specified room."), None),
            'show': (self.command_show, _("Usage: /show <availability> [status]\nShow: Change your availability and (optionaly) your status. The <availability> argument is one of \"avail, available, ok, here, chat, away, afk, dnd, busy, xa\" and the optional [status] argument will be your status message"), None),
            'away': (self.command_away, _("Usage: /away [message]\nAway: Sets your availability to away and (optional) sets your status message. This is equivalent to '/show away [message]'"), None),
            'busy': (self.command_busy, _("Usage: /busy [message]\nBusy: Sets your availability to busy and (optional) sets your status message. This is equivalent to '/show busy [message]'"), None),
            'avail': (self.command_avail, _("Usage: /avail [message]\nAvail: Sets your availability to available and (optional) sets your status message. This is equivalent to '/show available [message]'"), None),
            'available': (self.command_avail, _("Usage: /available [message]\nAvailable: Sets your availability to available and (optional) sets your status message. This is equivalent to '/show available [message]'"), None),
           'bookmark': (self.command_bookmark, _("Usage: /bookmark [roomname][/nick]\nBookmark: Bookmark the specified room (you will then auto-join it on each poezio start). This commands uses the same syntaxe as /join. Type /help join for syntaxe examples. Note that when typing \"/bookmark\" on its own, the room will be bookmarked with the nickname you\'re currently using in this room (instead of default_nick)"), None),
            'set': (self.command_set, _("Usage: /set <option> [value]\nSet: Sets the value to the option in your configuration file. You can, for example, change your default nickname by doing `/set default_nick toto` or your resource with `/set resource blabla`. You can also set an empty value (nothing) by providing no [value] after <option>."), None),
            'whois': (self.command_whois, _('Usage: /whois <nickname>\nWhois: Request many informations about the user.'), None),
            'theme': (self.command_theme, _('Usage: /theme\nTheme: Reload the theme defined in the config file.'), None),
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            'list': (self.command_list, _('Usage: /list\n/List: get the list of public chatrooms on the specified server'), self.completion_list),
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            }

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        self.key_func = {
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            "KEY_PPAGE": self.scroll_page_up,
            "KEY_NPAGE": self.scroll_page_down,
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            "KEY_F(5)": self.rotate_rooms_left,
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            "^P": self.rotate_rooms_left,
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            'kLFT3': self.rotate_rooms_left,
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            "KEY_F(6)": self.rotate_rooms_right,
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            "^N": self.rotate_rooms_right,
            'kRIT3': self.rotate_rooms_right,
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            "KEY_F(7)": self.shrink_information_win,
            "KEY_F(8)": self.grow_information_win,
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            "KEY_RESIZE": self.call_for_resize,
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            'M-e': self.go_to_important_room,
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            'M-r': self.go_to_roster,
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            'M-z': self.go_to_previous_tab,
            'M-v': self.move_separator,
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            '^L': self.full_screen_redraw,
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            }

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        # Add handlers
        self.xmpp.add_event_handler("session_start", self.on_connected)
        self.xmpp.add_event_handler("groupchat_presence", self.on_groupchat_presence)
        self.xmpp.add_event_handler("groupchat_message", self.on_groupchat_message)
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        self.xmpp.add_event_handler("groupchat_subject", self.on_groupchat_subject)
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        self.xmpp.add_event_handler("message", self.on_message)
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        self.xmpp.add_event_handler("got_online" , self.on_got_online)
        self.xmpp.add_event_handler("got_offline" , self.on_got_offline)
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        self.xmpp.add_event_handler("roster_update", self.on_roster_update)
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        self.xmpp.add_event_handler("changed_status", self.on_presence)
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    def on_exception(self, typ, value, trace):
        """
        When an exception in raised, open a special tab
        displaying the traceback and some instructions to
        make a bug report.
        """
        try:
            tb_tab = tabs.SimpleTextTab(self, "/!\ Oups, an error occured (this may not be fatal). /!\\\n\nPlease report this bug (by copying the present error message and explaining what you were doing) on the page http://codingteam.net/project/poezio/bugs/add\n\n%s\n\nIf Poezio does not respond anymore, kill it with Ctrl+\\, and sorry about that :(" % ''.join(traceback.format_exception(typ, value, trace)))
            self.add_tab(tb_tab, focus=True)
        except Exception:       # If an exception is raised in this code, this is
                                # this is fatal, so we exit cleanly and display the traceback
            curses.endwin()
            raise

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    def grow_information_win(self):
        """
        """
        if self.information_win_size == 14:
            return
        self.information_win_size += 1
        for tab in self.tabs:
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            tab.on_info_win_size_changed()
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        self.refresh_window()

    def shrink_information_win(self):
        """
        """
        if self.information_win_size == 0:
            return
        self.information_win_size -= 1
        for tab in self.tabs:
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            tab.on_info_win_size_changed()
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        self.refresh_window()
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    def on_got_offline(self, presence):
        jid = presence['from']
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        contact = roster.get_contact_by_jid(jid.bare)
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        if not contact:
            return
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        resource = contact.get_resource_by_fulljid(jid.full)
        assert resource
        self.information('%s is offline' % (resource.get_jid()), "Roster")
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        # Search all opened tab with this fulljid or the bare jid and add
        # an information message in all of them
        tab = self.get_tab_by_name(jid.full)
        if tab and isinstance(tab, tabs.ConversationTab):
            self.add_message_to_text_buffer(tab.get_room(), '%s is offline' % (resource.get_jid()))
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        contact.remove_resource(resource)
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        if isinstance(self.current_tab(), tabs.RosterInfoTab):
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            self.refresh_window()
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    def on_got_online(self, presence):
        jid = presence['from']
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        contact = roster.get_contact_by_jid(jid.bare)
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        if not contact:
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            # Todo, handle presence comming from contacts not in roster
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            return
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        resource = contact.get_resource_by_fulljid(jid.full)
        assert not resource
        resource = Resource(jid.full)
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        status = presence['type']
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        status_message = presence['status']
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        priority = presence.getPriority() or 0
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        resource.set_status(status_message)
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        resource.set_presence(status)
        resource.set_priority(priority)
        contact.add_resource(resource)
        self.information("%s is online (%s)" % (resource.get_jid().full, status), "Roster")
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    def on_connected(self, event):
        """
        Called when we are connected and authenticated
        """
        self.information(_("Welcome on Poezio \o/!"))
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        self.information(_("Your JID is %s") % self.xmpp.boundjid.full)
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        if not self.xmpp.anon:
            # request the roster
            self.xmpp.getRoster()
            # send initial presence
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            self.xmpp.makePresence().send()
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        rooms = config.get('rooms', '')
        if rooms == '' or not isinstance(rooms, str):
            return
        rooms = rooms.split(':')
        for room in rooms:
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            jid = JID(room)
            if jid.bare == '':
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                return
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            if jid.resource != '':
                nick = jid.resource
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            else:
                default = os.environ.get('USER') if os.environ.get('USER') else 'poezio'
                nick = config.get('default_nick', '')
                if nick == '':
                    nick = default
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            self.open_new_room(jid.bare, nick, False)
            muc.join_groupchat(self.xmpp, jid.bare, nick)
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        # if not self.xmpp.anon:
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        # Todo: SEND VCARD
        return
        if config.get('jid', '') == '': # Don't send the vcard if we're not anonymous
            self.vcard_sender.start()   # because the user ALREADY has one on the server

    def on_groupchat_presence(self, presence):
        """
        Triggered whenever a presence stanza is received from a user in a multi-user chat room.
        Display the presence on the room window and update the
        presence information of the concerned user
        """
        from_nick = presence['from'].resource
        from_room = presence['from'].bare
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        room = self.get_room_by_name(from_room)
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        code = presence.find('{jabber:client}status')
        status_codes = set([s.attrib['code'] for s in presence.findall('{http://jabber.org/protocol/muc#user}x/{http://jabber.org/protocol/muc#user}status')])
        # Check if it's not an error presence.
        if presence['type'] == 'error':
            return self.room_error(presence, from_room)
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        if not room:
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            return
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        msg = None
        affiliation = presence['muc']['affiliation']
        show = presence['show']
        status = presence['status']
        role = presence['muc']['role']
        jid = presence['muc']['jid']
        typ = presence['type']
        if not room.joined:     # user in the room BEFORE us.
            # ignore redondant presence message, see bug #1509
            if from_nick not in [user.nick for user in room.users]:
                new_user = User(from_nick, affiliation, show, status, role)
                room.users.append(new_user)
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                if from_nick == room.own_nick:
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                    room.joined = True
                    new_user.color = theme.COLOR_OWN_NICK
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                    self.add_message_to_text_buffer(room, _("Your nickname is %s") % (from_nick))
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                    if '170' in status_codes:
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                        self.add_message_to_text_buffer(room, 'Warning: this room is publicly logged')
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        else:
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            change_nick = '303' in status_codes
            kick = '307' in status_codes and typ == 'unavailable'
            user = room.get_user_by_name(from_nick)
            # New user
            if not user:
                self.on_user_join(room, from_nick, affiliation, show, status, role, jid)
            # nick change
            elif change_nick:
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                self.on_user_nick_change(room, presence, user, from_nick, from_room)
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            # kick
            elif kick:
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                self.on_user_kicked(room, presence, user, from_nick)
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            # user quit
            elif typ == 'unavailable':
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                self.on_user_leave_groupchat(room, user, jid, status, from_nick, from_room)
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            # status change
            else:
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                self.on_user_change_status(room, user, from_nick, from_room, affiliation, role, show, status)
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        self.refresh_window()
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        self.doupdate()
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    def on_user_join(self, room, from_nick, affiliation, show, status, role, jid):
        """
        When a new user joins a groupchat
        """
        room.users.append(User(from_nick, affiliation,
                               show, status, role))
        hide_exit_join = config.get('hide_exit_join', -1)
        if hide_exit_join != 0:
            if not jid.full:
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                self.add_message_to_text_buffer(room, _('%(spec)s "[%(nick)s]" joined the room') % {'nick':from_nick.replace('"', '\\"'), 'spec':theme.CHAR_JOIN.replace('"', '\\"')}, colorized=True)
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            else:
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                self.add_message_to_text_buffer(room, _('%(spec)s "[%(nick)s]" "(%(jid)s)" joined the room') % {'spec':theme.CHAR_JOIN.replace('"', '\\"'), 'nick':from_nick.replace('"', '\\"'), 'jid':jid.full}, colorized=True)
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    def on_user_nick_change(self, room, presence, user, from_nick, from_room):
        new_nick = presence.find('{http://jabber.org/protocol/muc#user}x/{http://jabber.org/protocol/muc#user}item').attrib['nick']
        if user.nick == room.own_nick:
            room.own_nick = new_nick
            # also change our nick in all private discussion of this room
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            for _tab in self.tabs:
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                if isinstance(_tab, tabs.PrivateTab) and JID(_tab.get_name()).bare == room.name:
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                    _tab.get_room().own_nick = new_nick
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        user.change_nick(new_nick)
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        self.add_message_to_text_buffer(room, _('"[%(old)s]" is now known as "[%(new)s]"') % {'old':from_nick.replace('"', '\\"'), 'new':new_nick.replace('"', '\\"')}, colorized=True)
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        # rename the private tabs if needed
        private_room = self.get_room_by_name('%s/%s' % (from_room, from_nick))
        if private_room:
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            self.add_message_to_text_buffer(private_room, _('"[%(old_nick)s]" is now known as "[%(new_nick)s]"') % {'old_nick':from_nick.replace('"', '\\"'), 'new_nick':new_nick.replace('"', '\\"')}, colorized=True)
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            new_jid = JID(private_room.name).bare+'/'+new_nick
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            private_room.name = new_jid
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    def on_user_kicked(self, room, presence, user, from_nick):
        """
        When someone is kicked
        """
        room.users.remove(user)
        by = presence.find('{http://jabber.org/protocol/muc#user}x/{http://jabber.org/protocol/muc#user}item/{http://jabber.org/protocol/muc#user}actor')
        reason = presence.find('{http://jabber.org/protocol/muc#user}x/{http://jabber.org/protocol/muc#user}item/{http://jabber.org/protocol/muc#user}reason')
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        by = by.attrib['jid'] if by is not None else None
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        reason = reason.text if reason else ''
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        if from_nick == room.own_nick: # we are kicked
            room.disconnect()
            if by:
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                kick_msg = _('%(spec)s [You] have been kicked by "[%(by)s]"') % {'spec': theme.CHAR_KICK.replace('"', '\\"'), 'by':by}
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            else:
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                kick_msg = _('%(spec)s [You] have been kicked.') % {'spec':theme.CHAR_KICK.replace('"', '\\"')}
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            # try to auto-rejoin
            if config.get('autorejoin', 'false') == 'true':
                muc.join_groupchat(self.xmpp, room.name, room.own_nick)
        else:
            if by:
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                kick_msg = _('%(spec)s "[%(nick)s]" has been kicked by "[%(by)s]"') % {'spec':theme.CHAR_KICK.replace('"', '\\"'), 'nick':from_nick.replace('"', '\\"'), 'by':by.replace('"', '\\"')}
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            else:
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                kick_msg = _('%(spec)s "[%(nick)s]" has been kicked') % {'spec':theme.CHAR_KICK, 'nick':from_nick.replace('"', '\\"')}
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        if reason:
            kick_msg += _(' Reason: %(reason)s') % {'reason': reason}
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        self.add_message_to_text_buffer(room, kick_msg, colorized=True)
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    def on_user_leave_groupchat(self, room, user, jid, status, from_nick, from_room):
        """
        When an user leaves a groupchat
        """
        room.users.remove(user)
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        if room.own_nick == user.nick:
            # We are now out of the room. Happens with some buggy (? not sure) servers
            room.disconnect()
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        hide_exit_join = config.get('hide_exit_join', -1) if config.get('hide_exit_join', -1) >= -1 else -1
        if hide_exit_join == -1 or user.has_talked_since(hide_exit_join):
            if not jid.full:
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                leave_msg = _('%(spec)s "[%(nick)s]" has left the room') % {'nick':from_nick.replace('"', '\\"'), 'spec':theme.CHAR_QUIT.replace('"', '\\"')}
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            else:
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                leave_msg = _('%(spec)s "[%(nick)s]" "(%(jid)s)" has left the room') % {'spec':theme.CHAR_QUIT.replace('"', '\\"'), 'nick':from_nick.replace('"', '\\"'), 'jid':jid.full.replace('"', '\\"')}
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            if status:
                leave_msg += ' (%s)' % status
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            self.add_message_to_text_buffer(room, leave_msg, colorized=True)
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        private_room = self.get_room_by_name('%s/%s' % (from_room, from_nick))
        if private_room:
            if not status:
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                self.add_message_to_text_buffer(private_room, _('%(spec)s "[%(nick)s]" has left the room') % {'nick':from_nick.replace('"', '\\"'), 'spec':theme.CHAR_QUIT.replace('"', '\\"')}, colorized=True)
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            else:
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                self.add_message_to_text_buffer(private_room, _('%(spec)s "[%(nick)s]" has left the room "(%(status)s)"') % {'nick':from_nick.replace('"', '\\"'), 'spec':theme.CHAR_QUIT, 'status': status.replace('"', '\\"')}, colorized=True)
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    def on_user_change_status(self, room, user, from_nick, from_room, affiliation, role, show, status):
        """
        When an user changes her status
        """
        # build the message
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        display_message = False # flag to know if something significant enough
        # to be displayed has changed
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        msg = _('"%s" changed: ')% from_nick.replace('"', '\\"')
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        if affiliation != user.affiliation:
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            msg += _('affiliation: %s, ') % affiliation
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            display_message = True
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        if role != user.role:
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            msg += _('role: %s, ') % role
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            display_message = True
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        if show != user.show and show in list(SHOW_NAME.keys()):
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            msg += _('show: %s, ') % SHOW_NAME[show]
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            display_message = True
        if status and status != user.status:
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            msg += _('status: %s, ') % status
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            display_message = True
        if not display_message:
            return
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        msg = msg[:-2] # remove the last ", "
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        hide_status_change = config.get('hide_status_change', -1) if config.get('hide_status_change', -1) >= -1 else -1
        if (hide_status_change == -1 or \
                user.has_talked_since(hide_status_change) or\
                user.nick == room.own_nick)\
                and\
                (affiliation != user.affiliation or\
                    role != user.role or\
                    show != user.show or\
                    status != user.status):
            # display the message in the room
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            self.add_message_to_text_buffer(room, msg, colorized=True)
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        private_room = self.get_room_by_name('%s/%s' % (from_room, from_nick))
        if private_room: # display the message in private
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            self.add_message_to_text_buffer(private_room, msg, colorized=True)
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        # finally, effectively change the user status
        user.update(affiliation, show, status, role)

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    def on_message(self, message):
        """
        When receiving private message from a muc OR a normal message
        (from one of our contacts)
        """
        if message['type'] == 'groupchat':
447
            return
448 449
        # Differentiate both type of messages, and call the appropriate handler.
        jid_from = message['from']
450
        for tab in self.tabs:
451
            if tab.get_name() == jid_from.bare and isinstance(tab, tabs.MucTab):
452
                if message['type'] == 'error':
453
                    return self.room_error(message, tab.get_room().name)
454 455
                else:
                    return self.on_groupchat_private_message(message)
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        return self.on_normal_message(message)

    def on_groupchat_private_message(self, message):
        """
        We received a Private Message (from someone in a Muc)
        """
        jid = message['from']
463
        nick_from = jid.resource
464
        room_from = jid.bare
465 466
        room = self.get_room_by_name(jid.full) # get the tab with the private conversation
        if not room: # It's the first message we receive: create the tab
467
            room = self.open_private_window(room_from, nick_from, False)
468 469 470
            if not room:
                return
        body = message['body']
471 472 473
        room.add_message(body, time=None, nickname=nick_from,
                         colorized=False,
                         forced_user=self.get_room_by_name(room_from).get_user_by_name(nick_from))
474
        self.refresh_window()
475
        self.doupdate()
476

477 478 479 480 481
    def focus_tab_named(self, tab_name):
        for tab in self.tabs:
            if tab.get_name() == tab_name:
                self.command_win('%s' % (tab.nb,))

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    def on_normal_message(self, message):
        """
        When receiving "normal" messages (from someone in our roster)
        """
486
        jid = message['from']
487 488 489
        body = message['body']
        if not body:
            return
490 491 492 493 494 495 496 497
        # We first check if we have a conversation opened with this precise resource
        conversation = self.get_tab_by_name(jid.full)
        if not conversation:
            # If not, we search for a conversation with the bare jid
            conversation = self.get_tab_by_name(jid.bare)
            if not conversation:
                # We create the conversation with the bare Jid if nothing was found
                conversation = self.open_conversation_window(jid.bare, False)
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        if roster.get_contact_by_jid(jid.bare):
            remote_nick = roster.get_contact_by_jid(jid.bare).get_name()
        else:
            remote_nick = jid.full
        conversation.get_room().add_message(body, None, remote_nick, False, theme.COLOR_REMOTE_USER)
503 504
        if self.current_tab() is not conversation:
            conversation.set_color_state(theme.COLOR_TAB_PRIVATE)
505
        self.refresh_window()
506 507 508 509

    def on_presence(self, presence):
        """
        """
510
        jid = presence['from']
511
        contact = roster.get_contact_by_jid(jid.bare)
512 513 514 515 516 517
        if not contact:
            return
        resource = contact.get_resource_by_fulljid(jid.full)
        if not resource:
            return
        status = presence['type']
518
        status_message = presence['status']
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        priority = presence.getPriority() or 0
        resource.set_presence(status)
        resource.set_priority(priority)
522
        resource.set_status(status_message)
523
        if isinstance(self.current_tab(), tabs.RosterInfoTab):
524
            self.refresh_window()
525

526 527 528 529 530
    def on_roster_update(self, iq):
        """
        A subscription changed, or we received a roster item
        after a roster request, etc
        """
531 532
        for item in iq.findall('{jabber:iq:roster}query/{jabber:iq:roster}item'):
            jid = item.attrib['jid']
533
            contact = roster.get_contact_by_jid(jid)
534 535
            if not contact:
                contact = Contact(jid)
536
                roster.add_contact(contact, jid)
537 538 539 540
            if 'ask' in item.attrib:
                contact.set_ask(item.attrib['ask'])
            else:
                contact.set_ask(None)
541 542 543 544
            if 'name' in item.attrib:
                contact.set_name(item.attrib['name'])
            else:
                contact.set_name(None)
545 546 547
            if item.attrib['subscription']:
                contact.set_subscription(item.attrib['subscription'])
            groups = item.findall('{jabber:iq:roster}group')
548
            roster.edit_groups_of_contact(contact, [group.text for group in groups])
549
        if isinstance(self.current_tab(), tabs.RosterInfoTab):
550
            self.refresh_window()
551

552 553 554 555 556 557 558
    def full_screen_redraw(self):
        """
        Completely erase and redraw the screen
        """
        self.stdscr.clear()
        self.call_for_resize()

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    def call_for_resize(self):
        """
        Starts a very short timer. If no other terminal resize
        occured in this delay then poezio is REALLY resize.
        This is to avoid multiple unnecessary software resizes (this
        can be heavy on resource on slow computers or networks)
        """
566 567 568 569 570 571 572 573 574
        with resize_lock:
            if self.resize_timer:
                # a recent terminal resize occured.
                # Cancel the programmed software resize
                self.resize_timer.cancel()
            # add the new timer
            self.resize_timer = threading.Timer(0.1, self.resize_window)
            self.resize_timer.start()
        # self.resize_window()
575

576 577 578 579
    def resize_window(self):
        """
        Resize the whole screen
        """
580 581
        with resize_lock:
            for tab in self.tabs:
582
                tab.resize()
583
            self.refresh_window()
584

585
    def main_loop(self):
586 587 588
        """
        main loop waiting for the user to press a key
        """
589
        self.refresh_window()
590
        while self.running:
591
            self.doupdate()
592
            char=read_char(self.stdscr)
593
            # search for keyboard shortcut
594
            if char in list(self.key_func.keys()):
595
                self.key_func[char]()
596
            else:
597
                self.do_command(char)
598

599
    def current_tab(self):
600 601 602
        """
        returns the current room, the one we are viewing
        """
603
        return self.tabs[0]
604

605 606 607 608 609
    def get_conversation_by_jid(self, jid):
        """
        Return the room of the ConversationTab with the given jid
        """
        for tab in self.tabs:
610
            if isinstance(tab, tabs.ConversationTab):
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                if tab.get_name() == jid:
                    return tab.get_room()
        return None

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    def get_tab_by_name(self, name):
        """
        Get the tab with the given name.
        """
        for tab in self.tabs:
            if tab.get_name() == name:
                return tab
        return None

624
    def get_room_by_name(self, name):
625 626 627
        """
        returns the room that has this name
        """
628
        for tab in self.tabs:
629
            if (isinstance(tab, tabs.MucTab) or
630
                isinstance(tab, tabs.PrivateTab)) and tab.get_name() == name:
631
                return tab.get_room()
632
        return None
633

634
    def init_curses(self, stdscr):
635 636 637
        """
        ncurses initialization
        """
638
        curses.curs_set(1)
639
        curses.noecho()
640 641
        # curses.raw()
        theme.init_colors()
642
        stdscr.keypad(True)
643

644
    def reset_curses(self):
645 646 647 648 649
        """
        Reset terminal capabilities to what they were before ncurses
        init
        """
        curses.echo()
650
        curses.nocbreak()
651
        curses.endwin()
652

653 654 655 656
    def refresh_window(self):
        """
        Refresh everything
        """
657
        self.current_tab().set_color_state(theme.COLOR_TAB_CURRENT)
658
        self.current_tab().refresh(self.tabs, self.information_buffer, roster)
659
        self.doupdate()
660

661
    def add_tab(self, new_tab, focus=False):
662
        """
663 664
        Appends the new_tab in the tab list and
        focus it if focus==True
665
        """
666 667
        if self.current_tab().nb == 0:
            self.tabs.append(new_tab)
668
        else:
669 670 671
            for ta in self.tabs:
                if ta.nb == 0:
                    self.tabs.insert(self.tabs.index(ta), new_tab)
672
                    break
673
        if focus:
674
            self.command_win("%s" % new_tab.nb)
675 676 677 678 679 680 681 682

    def open_new_room(self, room, nick, focus=True):
        """
        Open a new tab.MucTab containing a muc Room, using the specified nick
        """
        r = Room(room, nick)
        new_tab = tabs.MucTab(self, r)
        self.add_tab(new_tab, focus)
683
        self.refresh_window()
684

685 686 687 688 689 690
    def go_to_roster(self):
        self.command_win('0')

    def go_to_previous_tab(self):
        self.command_win('%s' % (self.previous_tab_nb,))

691 692 693 694 695 696 697
    def go_to_important_room(self):
        """
        Go to the next room with activity, in this order:
        - A personal conversation with a new message
        - A Muc with an highlight
        - A Muc with any new message
        """
698 699 700
        for tab in self.tabs:
            if tab.get_color_state() == theme.COLOR_TAB_PRIVATE:
                self.command_win('%s' % tab.nb)
701
                return
702 703 704
        for tab in self.tabs:
            if tab.get_color_state() == theme.COLOR_TAB_HIGHLIGHT:
                self.command_win('%s' % tab.nb)
705
                return
706 707 708
        for tab in self.tabs:
            if tab.get_color_state() == theme.COLOR_TAB_NEW_MESSAGE:
                self.command_win('%s' % tab.nb)
709
                return
710 711 712 713
        for tab in self.tabs:
            if isinstance(tab, tabs.ChatTab) and not tab.input.is_empty():
                self.command_win('%s' % tab.nb)
                return
714

715
    def rotate_rooms_right(self, args=None):
716 717 718
        """
        rotate the rooms list to the right
        """
719 720 721
        self.current_tab().on_lose_focus()
        self.tabs.append(self.tabs.pop(0))
        self.current_tab().on_gain_focus()
722
        self.refresh_window()
723

724
    def rotate_rooms_left(self, args=None):
725 726 727
        """
        rotate the rooms list to the right
        """
728 729 730
        self.current_tab().on_lose_focus()
        self.tabs.insert(0, self.tabs.pop())
        self.current_tab().on_gain_focus()
731
        self.refresh_window()
732

733
    def scroll_page_down(self, args=None):
734
        self.current_tab().on_scroll_down()
735
        self.refresh_window()
736 737

    def scroll_page_up(self, args=None):
738
        self.current_tab().on_scroll_up()
739
        self.refresh_window()
740

741
    def room_error(self, error, room_name):
742 743 744
        """
        Display the error on the room window
        """
745 746 747 748 749 750
        room = self.get_room_by_name(room_name)
        msg = error['error']['type']
        condition = error['error']['condition']
        code = error['error']['code']
        body = error['error']['text']
        if not body:
751
            if code in list(ERROR_AND_STATUS_CODES.keys()):
752 753
                body = ERROR_AND_STATUS_CODES[code]
            else:
754 755
                body = condition or _('Unknown error')
        if code:
756 757
            msg = _('Error: %(code)s - %(msg)s: %(body)s') % {'msg':msg, 'body':body, 'code':code}
            self.add_message_to_text_buffer(room, msg)
758
        else:
759 760
            msg = _('Error: %(msg)s: %(body)s') % {'msg':msg, 'body':body}
            self.add_message_to_text_buffer(room, msg)
761
        if code == '401':
762 763
            msg = _('To provide a password in order to join the room, type "/join / password" (replace "password" by the real password)')
            self.add_message_to_text_buffer(room, msg)
764
        if code == '409':
765 766 767
            if config.get('alternative_nickname', '') != '':
                self.command_join('%s/%s'% (room.name, room.own_nick+config.get('alternative_nickname', '')))
            else:
768
                self.add_message_to_text_buffer(room, _('You can join the room with an other nick, by typing "/join /other_nick"'))
769
        self.refresh_window()
770

771
    def open_conversation_window(self, jid, focus=True):
772 773 774
        """
        open a new conversation tab and focus it if needed
        """
775
        new_tab = tabs.ConversationTab(self, jid)
776
        # insert it in the rooms
777
        self.add_tab(new_tab, focus)
778
        self.refresh_window()
779
        return new_tab
780

781
    def open_private_window(self, room_name, user_nick, focus=True):
782
        complete_jid = room_name+'/'+user_nick
783
        for tab in self.tabs: # if the room exists, focus it and return
784
            if isinstance(tab, tabs.PrivateTab):
785 786
                if tab.get_name() == complete_jid:
                    self.command_win('%s' % tab.nb)
787
                    return tab.get_room()
788
        # create the new tab
789
        room = self.get_room_by_name(room_name)
790 791 792
        if not room:
            return None
        own_nick = room.own_nick
793
        r = Room(complete_jid, own_nick) # PrivateRoom here
794
        new_tab = tabs.PrivateTab(self, r)
795
        # insert it in the tabs
796
        self.add_tab(new_tab, focus)
797
        # self.window.new_room(r)
798
        self.refresh_window()