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chat_control.py

##    chat_control.py
##
## Copyright (C) 2006 Yann Le Boulanger <asterix@lagaule.org>
## Copyright (C) 2006 Nikos Kouremenos <kourem@gmail.com>
## Copyright (C) 2006 Travis Shirk <travis@pobox.com>
## Copyright (C) 2006 Dimitur Kirov <dkirov@gmail.com>
##
## This program 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 2 only.
##
## This program 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.
##

import os
import time
import gtk
import gtk.glade
import pango
import gobject
import gtkgui_helpers
import message_control
import dialogs
import history_window

from common import gajim
from common import helpers
from message_control import MessageControl
from conversation_textview import ConversationTextview
from message_textview import MessageTextView
from common.contacts import GC_Contact
from common.logger import Constants
constants = Constants()

try:
      import gtkspell
      HAS_GTK_SPELL = True
except:
      HAS_GTK_SPELL = False

####################
# FIXME: Can't this stuff happen once?
from common import i18n
_ = i18n._
APP = i18n.APP

GTKGUI_GLADE = 'gtkgui.glade'

################################################################################
00053 class ChatControlBase(MessageControl):
      '''A base class containing a banner, ConversationTextview, MessageTextView
      '''
00056       def get_font_attrs(self):
            ''' get pango font  attributes for banner from theme settings '''
            theme = gajim.config.get('roster_theme')
            bannerfont = gajim.config.get_per('themes', theme, 'bannerfont')
            bannerfontattrs = gajim.config.get_per('themes', theme, 'bannerfontattrs')
            
            if bannerfont:
                  font = pango.FontDescription(bannerfont)
            else:
                  font = pango.FontDescription('Normal')
            if bannerfontattrs:
                  # B attribute is set by default
                  if 'B' in bannerfontattrs:
                        font.set_weight(pango.WEIGHT_HEAVY)
                  if 'I' in bannerfontattrs:
                        font.set_style(pango.STYLE_ITALIC)
            
            font_attrs = 'font_desc="%s"' % font.to_string()
            
            # in case there is no font specified we use x-large font size
            if font.get_size() == 0:
                  font_attrs = '%s size="x-large"' % font_attrs
            font.set_weight(pango.WEIGHT_NORMAL)
            font_attrs_small = 'font_desc="%s" size="small"' % font.to_string()
            return (font_attrs, font_attrs_small)
                  
      def draw_banner(self):
            self._paint_banner()
            self._update_banner_state_image()
            # Derived types SHOULD implement this

      def update_ui(self):
            self.draw_banner()
            # Derived types SHOULD implement this

      def repaint_themed_widgets(self):
            self.draw_banner()
            # Derived classes MAY implement this

      def _update_banner_state_image(self):
            pass # Derived types MAY implement this

      def handle_message_textview_mykey_press(self, widget, event_keyval,
      event_keymod):
            pass # Derived should implement this rather than connecting to the event itself.

00102       def __init__(self, type_id, parent_win, widget_name, display_names, contact, acct, resource = None):
            MessageControl.__init__(self, type_id, parent_win, widget_name,
                  display_names,    contact, acct, resource = resource);
            # when/if we do XHTML we will but formatting buttons back
            widget = self.xml.get_widget('emoticons_button')
            id = widget.connect('clicked', self.on_emoticons_button_clicked)
            self.handlers[id] = widget
            
            id = self.widget.connect('key_press_event', self._on_keypress_event)
            self.handlers[id] = self.widget

            widget = self.xml.get_widget('banner_eventbox')
            id = widget.connect('button-press-event',
                  self._on_banner_eventbox_button_press_event)
            self.handlers[id] = widget
      
            # Create textviews and connect signals
            self.conv_textview = ConversationTextview(self.account)
            
            self.conv_scrolledwindow = self.xml.get_widget(
                  'conversation_scrolledwindow')
            self.conv_scrolledwindow.add(self.conv_textview.tv)
            widget = self.conv_scrolledwindow.get_vadjustment()
            id = widget.connect('value-changed',
                  self.on_conversation_vadjustment_value_changed)
            self.handlers[id] = widget
            # add MessageTextView to UI and connect signals
            self.msg_scrolledwindow = self.xml.get_widget('message_scrolledwindow')
            self.msg_textview = MessageTextView()
            id = self.msg_textview.connect('mykeypress',
                              self._on_message_textview_mykeypress_event)
            self.handlers[id] = self.msg_textview
            self.msg_scrolledwindow.add(self.msg_textview)
            id = self.msg_textview.connect('key_press_event',
                              self._on_message_textview_key_press_event)
            self.handlers[id] = self.msg_textview
            id = self.msg_textview.connect('size-request', self.size_request)
            self.handlers[id] = self.msg_textview
            self.update_font()

            # Hook up send button
            widget = self.xml.get_widget('send_button')
            id = widget.connect('clicked',
                                          self._on_send_button_clicked)
            self.handlers[id] = widget

            # the following vars are used to keep history of user's messages
            self.sent_history = []
            self.sent_history_pos = 0
            self.typing_new = False
            self.orig_msg = ''

            self.nb_unread = 0

            # Emoticons menu
            # set image no matter if user wants at this time emoticons or not
            # (so toggle works ok)
            img = self.xml.get_widget('emoticons_button_image')
            img.set_from_file(os.path.join(gajim.DATA_DIR, 'emoticons', 'static',
                  'smile.png'))
            self.toggle_emoticons()

            # Attach speller
            if gajim.config.get('use_speller') and HAS_GTK_SPELL:
                  try:
                        gtkspell.Spell(self.msg_textview)
                  except gobject.GError, msg:
                        #FIXME: add a ui for this use spell.set_language()
                        dialogs.ErrorDialog(unicode(msg), _('If that is not your language '
                              'for which you want to highlight misspelled words, then please '
                              'set your $LANG as appropriate. Eg. for French do export '
                              'LANG=fr_FR or export LANG=fr_FR.UTF-8 in ~/.bash_profile or to '
                              'make it global in /etc/profile.\n\nHighlighting misspelled '
                              'words feature will not be used'))
                        gajim.config.set('use_speller', False)

            self.style_event_id = 0
            self.conv_textview.tv.show()
      # moved from ChatControl 
00181       def _on_banner_eventbox_button_press_event(self, widget, event):
            '''If right-clicked, show popup'''
            if event.button == 3: # right click
                  self.parent_win.popup_menu(event)

00186       def _on_send_button_clicked(self, widget):
            '''When send button is pressed: send the current message'''
            if gajim.connections[self.account].connected < 2: # we are not connected
                  dialog = dialogs.ErrorDialog(_('A connection is not available'),
                        _('Your message can not be sent until you are connected.'))
                  return
            message_buffer = self.msg_textview.get_buffer()
            start_iter = message_buffer.get_start_iter()
            end_iter = message_buffer.get_end_iter()
            message = message_buffer.get_text(start_iter, end_iter, 0).decode('utf-8')

            # send the message
            self.send_message(message)

00200       def _paint_banner(self):
            '''Repaint banner with theme color'''
            theme = gajim.config.get('roster_theme')
            bgcolor = gajim.config.get_per('themes', theme, 'bannerbgcolor')
            textcolor = gajim.config.get_per('themes', theme, 'bannertextcolor')
            # the backgrounds are colored by using an eventbox by
            # setting the bg color of the eventbox and the fg of the name_label
            banner_eventbox = self.xml.get_widget('banner_eventbox')
            banner_name_label = self.xml.get_widget('banner_name_label')
            self.disconnect_style_event(banner_name_label)
            if bgcolor:
                  banner_eventbox.modify_bg(gtk.STATE_NORMAL, 
                        gtk.gdk.color_parse(bgcolor))
                  default_bg = False
            else:
                  default_bg = True
            if textcolor:
                  banner_name_label.modify_fg(gtk.STATE_NORMAL,
                        gtk.gdk.color_parse(textcolor))
                  default_fg = False
            else:
                  default_fg = True
            if default_bg or default_fg:
                  self._on_style_set_event(banner_name_label, None, default_fg,
                        default_bg)
      
      def disconnect_style_event(self, widget):
            if self.style_event_id:
                  widget.disconnect(self.style_event_id)
                  del self.handlers[self.style_event_id]
                  self.style_event_id = 0 
      
      def connect_style_event(self, widget, set_fg = False, set_bg = False):
            self.disconnect_style_event(widget)
            self.style_event_id = widget.connect('style-set',
                  self._on_style_set_event, set_fg, set_bg)
            self.handlers[self.style_event_id] = widget
      
00238       def _on_style_set_event(self, widget, style, *opts):
            '''set style of widget from style class *.Frame.Eventbox 
                  opts[0] == True -> set fg color
                  opts[1] == True -> set bg color'''
            banner_eventbox = self.xml.get_widget('banner_eventbox')
            self.disconnect_style_event(widget)
            if opts[1]:
                  bg_color = widget.style.bg[gtk.STATE_SELECTED]
                  banner_eventbox.modify_bg(gtk.STATE_NORMAL, bg_color)
            if opts[0]:
                  fg_color = widget.style.fg[gtk.STATE_SELECTED]
                  widget.modify_fg(gtk.STATE_NORMAL, fg_color)
            self.connect_style_event(widget, opts[0], opts[1])
      
      def _on_keypress_event(self, widget, event):
            if event.state & gtk.gdk.CONTROL_MASK:
                  # CTRL + l|L: clear conv_textview
                  if event.keyval == gtk.keysyms.l or event.keyval == gtk.keysyms.L:
                        self.conv_textview.tv.get_buffer().set_text('')
                        return True
                  # CTRL + v: Paste into msg_textview
                  elif event.keyval == gtk.keysyms.v:
                        if not self.msg_textview.is_focus():
                              self.msg_textview.grab_focus()
                        # Paste into the msg textview
                        self.msg_textview.emit('key_press_event', event)
                  # CTRL + u: emacs style clear line
                  elif event.keyval == gtk.keysyms.u:
                        self.clear(self.msg_textview) # clear message textview too
                  elif event.keyval == gtk.keysyms.ISO_Left_Tab: # CTRL + SHIFT + TAB
                        self.parent_win.move_to_next_unread_tab(False)
                        return True
                  elif event.keyval == gtk.keysyms.Tab: # CTRL + TAB
                        self.parent_win.move_to_next_unread_tab(True)
                        return True
                  # CTRL + PAGE_[UP|DOWN]: send to parent notebook
                  elif event.keyval == gtk.keysyms.Page_Down or \
                              event.keyval == gtk.keysyms.Page_Up:
                        self.parent_win.notebook.emit('key_press_event', event)
                        return True
            elif event.keyval == gtk.keysyms.m and \
                  (event.state & gtk.gdk.MOD1_MASK): # alt + m opens emoticons menu
                  if gajim.config.get('emoticons_theme'):
                        msg_tv = self.msg_textview
                        def set_emoticons_menu_position(w, msg_tv = self.msg_textview):
                              window = msg_tv.get_window(gtk.TEXT_WINDOW_WIDGET)
                              # get the window position
                              origin = window.get_origin()
                              size = window.get_size()
                              buf = msg_tv.get_buffer()
                              # get the cursor position
                              cursor = msg_tv.get_iter_location(buf.get_iter_at_mark(
                                    buf.get_insert()))
                              cursor =  msg_tv.buffer_to_window_coords(gtk.TEXT_WINDOW_TEXT,
                                    cursor.x, cursor.y)
                              x = origin[0] + cursor[0]
                              y = origin[1] + size[1]
                              menu_width, menu_height = \
                                    gajim.interface.emoticons_menu.size_request()
                              #FIXME: get_line_count is not so good
                              #get the iter of cursor, then tv.get_line_yrange
                              # so we know in which y we are typing (not how many lines we have
                              # then go show just above the current cursor line for up
                              # or just below the current cursor line for down
                              #TEST with having 3 lines and writing in the 2nd
                              if y + menu_height > gtk.gdk.screen_height():
                                    # move menu just above cursor
                                    y -= menu_height +\
                                          (msg_tv.allocation.height / buf.get_line_count())
                              #else: # move menu just below cursor
                              #     y -= (msg_tv.allocation.height / buf.get_line_count())
                              return (x, y, True) # push_in True
                        gajim.interface.emoticon_menuitem_clicked = self.append_emoticon
                        gajim.interface.emoticons_menu.popup(None, None,
                              set_emoticons_menu_position, 1, 0)
            return False

      def _on_message_textview_key_press_event(self, widget, event):
            if self.widget_name == 'muc_child_vbox':
                  if event.keyval not in (gtk.keysyms.ISO_Left_Tab, gtk.keysyms.Tab):
                        self.last_key_tabs = False
            if event.state & gtk.gdk.SHIFT_MASK:
                  # CTRL + SHIFT + TAB
                  if event.state & gtk.gdk.CONTROL_MASK and \
                              event.keyval == gtk.keysyms.ISO_Left_Tab:
                        self.parent_win.move_to_next_unread_tab(False)
                        return True
                  # SHIFT + PAGE_[UP|DOWN]: send to conv_textview
                  elif event.keyval == gtk.keysyms.Page_Down or \
                              event.keyval == gtk.keysyms.Page_Up:
                        self.conv_textview.tv.emit('key_press_event', event)
                        return True
            elif event.state & gtk.gdk.CONTROL_MASK:
                  if event.keyval == gtk.keysyms.Tab: # CTRL + TAB
                        self.parent_win.move_to_next_unread_tab(True)
                        return True
                  # CTRL + PAGE_[UP|DOWN]: send to parent notebook
                  elif event.keyval == gtk.keysyms.Page_Down or \
                              event.keyval == gtk.keysyms.Page_Up:
                        self.parent_win.notebook.emit('key_press_event', event)
                        return True
                  # we pressed a control key or ctrl+sth: we don't block
                  # the event in order to let ctrl+c (copy text) and
                  # others do their default work
                  self.conv_textview.tv.emit('key_press_event', event)
            return False

00345       def _on_message_textview_mykeypress_event(self, widget, event_keyval,
            event_keymod):
            '''When a key is pressed:
            if enter is pressed without the shift key, message (if not empty) is sent
            and printed in the conversation'''

            # NOTE: handles mykeypress which is custom signal connected to this
            # CB in new_tab(). for this singal see message_textview.py
            message_textview = widget
            message_buffer = message_textview.get_buffer()
            start_iter, end_iter = message_buffer.get_bounds()
            message = message_buffer.get_text(start_iter, end_iter, False).decode('utf-8')

            # construct event instance from binding
            event = gtk.gdk.Event(gtk.gdk.KEY_PRESS) # it's always a key-press here
            event.keyval = event_keyval
            event.state = event_keymod
            event.time = 0 # assign current time

            if event.keyval == gtk.keysyms.Up:
                  if event.state & gtk.gdk.CONTROL_MASK: # Ctrl+UP
                        self.sent_messages_scroll('up', widget.get_buffer())
            elif event.keyval == gtk.keysyms.Down:
                  if event.state & gtk.gdk.CONTROL_MASK: # Ctrl+Down
                        self.sent_messages_scroll('down', widget.get_buffer())
            elif event.keyval == gtk.keysyms.Return or \
                  event.keyval == gtk.keysyms.KP_Enter: # ENTER
                  # NOTE: SHIFT + ENTER is not needed to be emulated as it is not
                  # binding at all (textview's default action is newline)

                  if gajim.config.get('send_on_ctrl_enter'):
                        # here, we emulate GTK default action on ENTER (add new line)
                        # normally I would add in keypress but it gets way to complex
                        # to get instant result on changing this advanced setting
                        if event.state == 0: # no ctrl, no shift just ENTER add newline
                              end_iter = message_buffer.get_end_iter()
                              message_buffer.insert_at_cursor('\n')
                              send_message = False
                        elif event.state & gtk.gdk.CONTROL_MASK: # CTRL + ENTER
                              send_message = True
                  else: # send on Enter, do newline on Ctrl Enter
                        if event.state & gtk.gdk.CONTROL_MASK: # Ctrl + ENTER
                              end_iter = message_buffer.get_end_iter()
                              message_buffer.insert_at_cursor('\n')
                              send_message = False
                        else: # ENTER
                              send_message = True
                        
                  if gajim.connections[self.account].connected < 2: # we are not connected
                        dialog = dialogs.ErrorDialog(_('A connection is not available'),
                              _('Your message can not be sent until you are connected.'))
                        send_message = False

                  if send_message:
                        self.send_message(message) # send the message
            else:
                  # Give the control itself a chance to process
                  self.handle_message_textview_mykey_press(widget, event_keyval, event_keymod)

      def _process_command(self, message):
            if not message:
                  return False

            message = message[1:]
            message_array = message.split(' ', 1)
            command = message_array.pop(0).lower()
            if message_array == ['']:
                  message_array = []

            if command == 'clear' and not len(message_array):
                  self.conv_textview.clear() # clear conversation
                  self.clear(self.msg_textview) # clear message textview too
                  return True
            elif message == 'compact' and not len(message_array):
                  self.chat_buttons_set_visible(not self.hide_chat_buttons_current)
                  self.clear(self.msg_textview)
                  return True
            return False

00424       def send_message(self, message, keyID = '', type = 'chat', chatstate = None,
      msg_id = None, composing_jep = None, resource = None):
            '''Send the given message to the active tab'''
            if not message or message == '\n':
                  return

            if not self._process_command(message):
                  MessageControl.send_message(self, message, keyID, type = type,
                        chatstate = chatstate, msg_id = msg_id,
                        composing_jep = composing_jep, resource = resource)
                  # Record message history
                  self.save_sent_message(message)

            # Clear msg input
            message_buffer = self.msg_textview.get_buffer()
            message_buffer.set_text('') # clear message buffer (and tv of course)

      def save_sent_message(self, message):
            #save the message, so user can scroll though the list with key up/down
            size = len(self.sent_history)
            #we don't want size of the buffer to grow indefinately
            max_size = gajim.config.get('key_up_lines')
            if size >= max_size:
                  for i in xrange(0, size - 1): 
                        self.sent_history[i] = self.sent_history[i + 1]
                  self.sent_history[max_size - 1] = message
            else:
                  self.sent_history.append(message)
                  self.sent_history_pos = size + 1

            self.typing_new = True
            self.orig_msg = ''

00457       def print_conversation_line(self, text, kind, name, tim,
            other_tags_for_name = [], other_tags_for_time = [], 
            other_tags_for_text = [], count_as_new = True, subject = None):
            '''prints 'chat' type messages'''
            jid = self.contact.jid
            full_jid = self.get_full_jid()
            textview = self.conv_textview
            end = False
            if textview.at_the_end() or kind == 'outgoing':
                  end = True
            textview.print_conversation_line(text, jid, kind, name, tim,
                  other_tags_for_name, other_tags_for_time, other_tags_for_text, subject)

            if not count_as_new:
                  return
            if kind == 'incoming':
                  gajim.last_message_time[self.account][full_jid] = time.time()
            urgent = True
            if (not self.parent_win.get_active_jid() or \
                        full_jid != self.parent_win.get_active_jid() or \
                        not self.parent_win.is_active() or not end) and \
                        kind in ('incoming', 'incoming_queue'):
                  self.nb_unread += 1
                  if gajim.interface.systray_enabled and self.notify_on_new_messages():
                        gajim.interface.systray.add_jid(full_jid, self.account, self.type_id)
                  self.parent_win.redraw_tab(self)
                  if not self.parent_win.is_active():
                        ctrl = gajim.interface.msg_win_mgr.get_control(full_jid,
                              self.account)
                        self.parent_win.show_title(urgent, ctrl)

00488       def toggle_emoticons(self):
            '''hide show emoticons_button and make sure emoticons_menu is always there
            when needed'''
            emoticons_button = self.xml.get_widget('emoticons_button')
            if gajim.config.get('emoticons_theme'):
                  emoticons_button.show()
                  emoticons_button.set_no_show_all(False)
            else:
                  emoticons_button.hide()
                  emoticons_button.set_no_show_all(True)

      def append_emoticon(self, str_):
            buffer = self.msg_textview.get_buffer()
            if buffer.get_char_count():
                  buffer.insert_at_cursor(' %s ' % str_)
            else: # we are the beginning of buffer
                  buffer.insert_at_cursor('%s ' % str_)
            self.msg_textview.grab_focus()
00506       def on_emoticons_button_clicked(self, widget):
            '''popup emoticons menu'''
            gajim.interface.emoticon_menuitem_clicked = self.append_emoticon
            gajim.interface.popup_emoticons_under_button(widget, self.parent_win)

00511       def on_actions_button_clicked(self, widget):
            '''popup action menu'''
            #FIXME: BUG http://bugs.gnome.org/show_bug.cgi?id=316786
            self.button_clicked = widget
            
            menu = self.prepare_context_menu()
            menu.show_all()
            gtkgui_helpers.popup_emoticons_under_button(menu, widget, self.parent_win)

      def update_font(self):
            font = pango.FontDescription(gajim.config.get('conversation_font'))
            self.conv_textview.tv.modify_font(font)
            self.msg_textview.modify_font(font)

      def update_tags(self):
            self.conv_textview.update_tags()

      def clear(self, tv):
            buffer = tv.get_buffer()
            start, end = buffer.get_bounds()
            buffer.delete(start, end)

00533       def _on_history_menuitem_activate(self, widget = None, jid = None):
            '''When history menuitem is pressed: call history window'''
            if not jid:
                  jid = self.contact.jid

            if gajim.interface.instances['logs'].has_key(jid):
                  gajim.interface.instances['logs'][jid].window.present()
            else:
                  gajim.interface.instances['logs'][jid] = \
                        history_window.HistoryWindow(jid, self.account)

      def _on_compact_view_menuitem_activate(self, widget):
            isactive = widget.get_active()
            self.chat_buttons_set_visible(isactive)

00548       def set_control_active(self, state):
            if state:
                  jid = self.contact.jid
                  if self.conv_textview.at_the_end():
                        #we are at the end
                        if self.nb_unread > 0:
                              self.nb_unread = self.get_specific_unread()
                              self.parent_win.redraw_tab(self)
                              self.parent_win.show_title()
                              if gajim.interface.systray_enabled:
                                    gajim.interface.systray.remove_jid(self.get_full_jid(),
                                                            self.account,
                                                            self.type_id)
                  self.msg_textview.grab_focus()
                  # Note, we send None chatstate to preserve current
                  self.parent_win.redraw_tab(self)

00565       def bring_scroll_to_end(self, textview, diff_y = 0):
            ''' scrolls to the end of textview if end is not visible '''
            buffer = textview.get_buffer()
            end_iter = buffer.get_end_iter()
            end_rect = textview.get_iter_location(end_iter)
            visible_rect = textview.get_visible_rect()
            # scroll only if expected end is not visible
            if end_rect.y >= (visible_rect.y + visible_rect.height + diff_y):
                  gobject.idle_add(self.scroll_to_end_iter, textview)

      def scroll_to_end_iter(self, textview):
            buffer = textview.get_buffer()
            end_iter = buffer.get_end_iter()
            textview.scroll_to_iter(end_iter, 0, False, 1, 1)
            return False

00581       def size_request(self, msg_textview , requisition):
            ''' When message_textview changes its size. If the new height
            will enlarge the window, enable the scrollbar automatic policy
            Also enable scrollbar automatic policy for horizontal scrollbar
            if message we have in message_textview is too big'''
            if msg_textview.window is None:
                  return

            min_height = self.conv_scrolledwindow.get_property('height-request')
            conversation_height = self.conv_textview.tv.window.get_size()[1]
            message_height = msg_textview.window.get_size()[1]
            message_width = msg_textview.window.get_size()[0]
            # new tab is not exposed yet
            if conversation_height < 2:
                  return

            if conversation_height < min_height:
                  min_height = conversation_height

            # we don't want to always resize in height the message_textview
            # so we have minimum on conversation_textview's scrolled window
            # but we also want to avoid window resizing so if we reach that 
            # minimum for conversation_textview and maximum for message_textview
            # we set to automatic the scrollbar policy
            diff_y =  message_height - requisition.height
            if diff_y != 0:
                  if conversation_height + diff_y < min_height:
                        if message_height + conversation_height - min_height > min_height:
                              self.msg_scrolledwindow.set_property('vscrollbar-policy', 
                                    gtk.POLICY_AUTOMATIC)
                              self.msg_scrolledwindow.set_property('height-request', 
                                    message_height + conversation_height - min_height)
                              self.bring_scroll_to_end(msg_textview)
                  else:
                        self.msg_scrolledwindow.set_property('vscrollbar-policy', 
                              gtk.POLICY_NEVER)
                        self.msg_scrolledwindow.set_property('height-request', -1)

            self.conv_textview.bring_scroll_to_end(diff_y - 18)
            
            # enable scrollbar automatic policy for horizontal scrollbar
            # if message we have in message_textview is too big
            if requisition.width > message_width:
                  self.msg_scrolledwindow.set_property('hscrollbar-policy', 
                        gtk.POLICY_AUTOMATIC)
            else:
                  self.msg_scrolledwindow.set_property('hscrollbar-policy', 
                        gtk.POLICY_NEVER)

            return True

      def on_conversation_vadjustment_value_changed(self, widget):
            if not self.nb_unread:
                  return
            jid = self.contact.jid
            if self.conv_textview.at_the_end() and \
                        self.parent_win.get_active_control() == self and \
                        self.parent_win.window.is_active():
                  #we are at the end
                  self.nb_unread = self.get_specific_unread()
                  self.parent_win.redraw_tab(self)
                  self.parent_win.show_title()
                  if gajim.interface.systray_enabled:
                        gajim.interface.systray.remove_jid(jid, self.account,
                              self.type_id)

      def sent_messages_scroll(self, direction, conv_buf):
            size = len(self.sent_history) 
            if self.typing_new:
                  #user was typing something and then went into history, so save
                  #whatever is already typed
                  start_iter = conv_buf.get_start_iter()
                  end_iter = conv_buf.get_end_iter()
                  self.orig_msg = conv_buf.get_text(start_iter, end_iter, 0).decode('utf-8')
                  self.typing_new = False
            if direction == 'up':
                  if self.sent_history_pos == 0:
                        return
                  self.sent_history_pos = self.sent_history_pos - 1
                  conv_buf.set_text(self.sent_history[self.sent_history_pos])
            elif direction == 'down':
                  if self.sent_history_pos >= size - 1:
                        conv_buf.set_text(self.orig_msg);
                        self.typing_new = True
                        self.sent_history_pos = size
                        return

                  self.sent_history_pos = self.sent_history_pos + 1
                  conv_buf.set_text(self.sent_history[self.sent_history_pos])

      def lighten_color(self, color):
            p = 0.4
            mask = 0
            color.red = int((color.red * p) + (mask * (1 - p)))
            color.green = int((color.green * p) + (mask * (1 - p)))
            color.blue = int((color.blue * p) + (mask * (1 - p)))
            return color

00679       def widget_set_visible(self, widget, state):
            '''Show or hide a widget. state is bool'''
            # make the last message visible, when changing to "full view"
            if not state:
                  gobject.idle_add(self.conv_textview.scroll_to_end_iter)

            widget.set_no_show_all(state)
            if state:
                  widget.hide()
            else:
                  widget.show_all()

00691       def chat_buttons_set_visible(self, state):
            '''Toggle chat buttons. state is bool'''
            MessageControl.chat_buttons_set_visible(self, state)
            self.widget_set_visible(self.xml.get_widget('actions_hbox'), state)

      def got_connected(self):
            self.msg_textview.set_sensitive(True)
            self.msg_textview.set_editable(True)
            self.xml.get_widget('send_button').set_sensitive(True)

      def got_disconnected(self):
            self.msg_textview.set_sensitive(False)
            self.msg_textview.set_editable(False)
            self.xml.get_widget('send_button').set_sensitive(False)

################################################################################
00707 class ChatControl(ChatControlBase):
      '''A control for standard 1-1 chat'''
      TYPE_ID = message_control.TYPE_CHAT

      def __init__(self, parent_win, contact, acct, resource = None):
            ChatControlBase.__init__(self, self.TYPE_ID, parent_win, 'chat_child_vbox',
                  (_('Chat'), _('Chats')), contact, acct, resource)
                  
            # for muc use:
            # widget = self.xml.get_widget('muc_window_actions_button')
            widget = self.xml.get_widget('message_window_actions_button')
            id = widget.connect('clicked', self.on_actions_button_clicked)
            self.handlers[id] = widget

            self.hide_chat_buttons_always = gajim.config.get('always_hide_chat_buttons')
            self.chat_buttons_set_visible(self.hide_chat_buttons_always)
            self.widget_set_visible(self.xml.get_widget('banner_eventbox'), gajim.config.get('hide_chat_banner'))
            # Initialize drag-n-drop
            self.TARGET_TYPE_URI_LIST = 80
            self.dnd_list = [ ( 'text/uri-list', 0, self.TARGET_TYPE_URI_LIST ) ]
            id = self.widget.connect('drag_data_received', self._on_drag_data_received)
            self.handlers[id] = self.widget
            self.widget.drag_dest_set(gtk.DEST_DEFAULT_MOTION |
                  gtk.DEST_DEFAULT_HIGHLIGHT |
                  gtk.DEST_DEFAULT_DROP,
                  self.dnd_list, gtk.gdk.ACTION_COPY)

            # keep timeout id and window obj for possible big avatar
            # it is on enter-notify and leave-notify so no need to be per jid
            self.show_bigger_avatar_timeout_id = None
            self.bigger_avatar_window = None
            self.show_avatar(self.contact.resource)               

            # chatstate timers and state
            self.reset_kbd_mouse_timeout_vars()
            self._schedule_activity_timers()

            # Hook up signals
            id = self.parent_win.window.connect('motion-notify-event',
                  self._on_window_motion_notify)
            self.handlers[id] = self.parent_win.window
            message_tv_buffer = self.msg_textview.get_buffer()
            id = message_tv_buffer.connect('changed', self._on_message_tv_buffer_changed)
            self.handlers[id] = message_tv_buffer
            
            widget = self.xml.get_widget('avatar_eventbox')
            id = widget.connect('enter-notify-event', self.on_avatar_eventbox_enter_notify_event)
            self.handlers[id] = widget

            widget = self.xml.get_widget('avatar_eventbox')
            id = widget.connect('leave-notify-event', self.on_avatar_eventbox_leave_notify_event)
            self.handlers[id] = widget

            widget = self.xml.get_widget('gpg_togglebutton')
            id = widget.connect('clicked', self.on_toggle_gpg_togglebutton)
            self.handlers[id] = widget

            if self.contact.jid in gajim.encrypted_chats[self.account]:
                  self.xml.get_widget('gpg_togglebutton').set_active(True)
            
            self.status_tooltip = gtk.Tooltips()
            self.update_ui()
            # restore previous conversation
            self.restore_conversation()

      def notify_on_new_messages(self):
            return gajim.config.get('trayicon_notification_on_new_messages')
      
00775       def on_avatar_eventbox_enter_notify_event(self, widget, event):
            '''we enter the eventbox area so we under conditions add a timeout
            to show a bigger avatar after 0.5 sec'''
            jid = self.contact.jid
            is_fake = False
            if self.type_id == message_control.TYPE_PM:
                  is_fake = True
            avatar_pixbuf = gtkgui_helpers.get_avatar_pixbuf_from_cache(jid,
                  is_fake)
            if avatar_pixbuf in ('ask', None):
                  return
            avatar_w = avatar_pixbuf.get_width()
            avatar_h = avatar_pixbuf.get_height()
            
            scaled_buf = self.xml.get_widget('avatar_image').get_pixbuf()
            scaled_buf_w = scaled_buf.get_width()
            scaled_buf_h = scaled_buf.get_height()
            
            # do we have something bigger to show?
            if avatar_w > scaled_buf_w or avatar_h > scaled_buf_h:
                  # wait for 0.5 sec in case we leave earlier
                  self.show_bigger_avatar_timeout_id = gobject.timeout_add(500,
                        self.show_bigger_avatar, widget)
            
00799       def on_avatar_eventbox_leave_notify_event(self, widget, event):
            '''we left the eventbox area that holds the avatar img'''
            # did we add a timeout? if yes remove it
            if self.show_bigger_avatar_timeout_id is not None:
                  gobject.source_remove(self.show_bigger_avatar_timeout_id)

00805       def _on_window_motion_notify(self, widget, event):
            '''it gets called no matter if it is the active window or not'''
            if self.parent_win.get_active_jid() == self.contact.jid:
                  # if window is the active one, change vars assisting chatstate
                  self.mouse_over_in_last_5_secs = True
                  self.mouse_over_in_last_30_secs = True

      def _schedule_activity_timers(self):
            self.possible_paused_timeout_id = gobject.timeout_add(5000,
                  self.check_for_possible_paused_chatstate, None)
            self.possible_inactive_timeout_id = gobject.timeout_add(30000,
                  self.check_for_possible_inactive_chatstate, None)

      def update_ui(self):
            # The name banner is drawn here
            ChatControlBase.update_ui(self)

      def _update_banner_state_image(self):
            contact = gajim.contacts.get_contact_with_highest_priority(self.account,
                  self.contact.jid)
            if not contact or self.resource:
                  # For transient contacts
                  contact = self.contact
            show = contact.show
            jid = contact.jid

            # Set banner image
            img_32 = gajim.interface.roster.get_appropriate_state_images(jid,
                  size = '32', icon_name = show)
            img_16 = gajim.interface.roster.get_appropriate_state_images(jid,
                  icon_name = show)
            if img_32.has_key(show) and img_32[show].get_pixbuf():
                  # we have 32x32! use it!
                  banner_image = img_32[show]
                  use_size_32 = True
            else:
                  banner_image = img_16[show]
                  use_size_32 = False

            banner_status_img = self.xml.get_widget('banner_status_image')
            if banner_image.get_storage_type() == gtk.IMAGE_ANIMATION:
                  banner_status_img.set_from_animation(banner_image.get_animation())
            else:
                  pix = banner_image.get_pixbuf()
                  if pix is not None:
                        if use_size_32:
                              banner_status_img.set_from_pixbuf(pix)
                        else: # we need to scale 16x16 to 32x32
                              scaled_pix = pix.scale_simple(32, 32,
                                                      gtk.gdk.INTERP_BILINEAR)
                              banner_status_img.set_from_pixbuf(scaled_pix)

            self._update_gpg()

00859       def draw_banner(self, chatstate = None):
            '''Draw the fat line at the top of the window that 
            houses the status icon, name, jid.  The chatstate arg should
            only be used if the control's chatstate member is NOT to be use, such as
            composing, paused, etc.
            '''
            ChatControlBase.draw_banner(self)

            contact = self.contact
            jid = contact.jid

            banner_name_label = self.xml.get_widget('banner_name_label')
            name = contact.get_shown_name()
            avoid_showing_account_too = False
            if self.resource:
                  name += '/' + self.resource
                  avoid_showing_account_too = True
            name = gtkgui_helpers.escape_for_pango_markup(name)

            # We know our contacts nick, but if there are any other controls 
            # with the same nick we need to also display the account
            # except if we are talking to two different resources of the same contact
            acct_info = ''
            for ctrl in self.parent_win.controls():
                  if ctrl == self:
                        continue
                  if self.contact.get_shown_name() == ctrl.contact.get_shown_name()\
                  and not avoid_showing_account_too:
                        acct_info = ' (%s)' % \
                                    gtkgui_helpers.escape_for_pango_markup(self.account)
                        break

            status = contact.status
            if status is not None:
                  banner_name_label.set_ellipsize(pango.ELLIPSIZE_END)
                  status = gtkgui_helpers.reduce_chars_newlines(status, max_lines = 2)
            status_escaped = gtkgui_helpers.escape_for_pango_markup(status)

            font_attrs, font_attrs_small = self.get_font_attrs()
            st = gajim.config.get('chat_state_notifications')
            cs = contact.chatstate
            if cs and st in ('composing_only', 'all'):
                  if contact.show == 'offline':
                        chatstate = ''
                  elif st == 'all' and contact.composing_jep == 'JEP-0085':
                        chatstate = helpers.get_uf_chatstate(cs)
                  elif st == 'composing_only' or contact.composing_jep == 'JEP-0022':
                        if cs in ('composing', 'paused'):
                              # only print composing, paused
                              chatstate = helpers.get_uf_chatstate(cs)
                        else:
                              chatstate = ''
                  elif chatstate is None:
                        chatstate = helpers.get_uf_chatstate(cs)
                  
                  label_text = '<span %s>%s</span><span %s>%s %s</span>' % \
                                          (font_attrs, name, font_attrs_small, acct_info, chatstate)
            else:
                  # weight="heavy" size="x-large"
                  label_text = '<span %s>%s</span><span %s>%s</span>' % \
                                                            (font_attrs, name, font_attrs_small, acct_info)
            if status_escaped:
                  label_text += '\n<span %s>%s</span>' %\
                                                                  (font_attrs_small, status_escaped)
                  banner_eventbox = self.xml.get_widget('banner_eventbox')
                  self.status_tooltip.set_tip(banner_eventbox, status)
                  self.status_tooltip.enable()
            else:
                  self.status_tooltip.disable()
            # setup the label that holds name and jid
            banner_name_label.set_markup(label_text)
      
      def on_toggle_gpg_togglebutton(self, widget):
            gajim.config.set_per('contacts', self.contact.get_full_jid(),
                  'gpg_enabled', widget.get_active())

      def _update_gpg(self):
            tb = self.xml.get_widget('gpg_togglebutton')
            # we can do gpg
            # if self.contact is our own contact info (transports), 
            # don't enable pgp
            if self.contact.keyID and not gajim.jid_is_transport(self.contact.jid): 
                  tb.set_sensitive(True)
                  tt = _('OpenPGP Encryption')

                  # restore gpg pref
                  gpg_pref = gajim.config.get_per('contacts',
                        self.contact.get_full_jid(), 'gpg_enabled')
                  if gpg_pref == None:
                        gajim.config.add_per('contacts', self.contact.get_full_jid())
                        gpg_pref = gajim.config.get_per('contacts',
                              self.contact.get_full_jid(), 'gpg_enabled')
                  tb.set_active(gpg_pref)

            else:
                  tb.set_sensitive(False)
                  #we talk about a contact here
                  tt = _('%s has not broadcast an OpenPGP key, nor has one been assigned') %\
                              self.contact.get_shown_name()
            gtk.Tooltips().set_tip(self.xml.get_widget('gpg_eventbox'), tt)

00960       def send_message(self, message, keyID = '', chatstate = None):
            '''Send a message to contact'''
            if message in ('', None, '\n') or self._process_command(message):
                  return

            # refresh timers
            self.reset_kbd_mouse_timeout_vars()

            contact = self.contact
            jid = self.contact.jid

            keyID = ''
            encrypted = False
            if self.xml.get_widget('gpg_togglebutton').get_active():
                  keyID = contact.keyID
                  encrypted = True


            chatstates_on = gajim.config.get('chat_state_notifications') != 'disabled'
            chatstate_to_send = None
            if chatstates_on and contact is not None:
                  if contact.composing_jep is None:
                        # no info about peer
                        # send active to discover chat state capabilities
                        # this is here (and not in send_chatstate)
                        # because we want it sent with REAL message
                        # (not standlone) eg. one that has body
                        chatstate_to_send = 'active'
                        contact.our_chatstate = 'ask' # pseudo state
                  # if peer supports jep85 and we are not 'ask', send 'active'
                  # NOTE: first active and 'ask' is set in gajim.py
                  elif contact.composing_jep is not False:
                        #send active chatstate on every message (as JEP says)
                        chatstate_to_send = 'active'
                        contact.our_chatstate = 'active'

                        gobject.source_remove(self.possible_paused_timeout_id)
                        gobject.source_remove(self.possible_inactive_timeout_id)
                        self._schedule_activity_timers()
                        
            ChatControlBase.send_message(self, message, keyID, type = 'chat',
                  chatstate = chatstate_to_send,
                  composing_jep = contact.composing_jep)
            self.print_conversation(message, self.contact.jid, encrypted = encrypted)

01005       def check_for_possible_paused_chatstate(self, arg):
            ''' did we move mouse of that window or write something in message
            textview in the last 5 seconds?
            if yes we go active for mouse, composing for kbd
            if no we go paused if we were previously composing '''
            contact = self.contact
            jid = contact.jid
            current_state = contact.our_chatstate
            if current_state is False: # jid doesn't support chatstates
                  return False # stop looping

            message_buffer = self.msg_textview.get_buffer()
            if self.kbd_activity_in_last_5_secs and message_buffer.get_char_count():
                  # Only composing if the keyboard activity was in text entry
                  self.send_chatstate('composing')
            elif self.mouse_over_in_last_5_secs and\
                  jid == self.parent_win.get_active_jid():
                  self.send_chatstate('active')
            else:
                  if current_state == 'composing':
                        self.send_chatstate('paused') # pause composing

            # assume no activity and let the motion-notify or 'insert-text' make them True
            # refresh 30 seconds vars too or else it's 30 - 5 = 25 seconds!
            self.reset_kbd_mouse_timeout_vars()
            return True # loop forever          

01032       def check_for_possible_inactive_chatstate(self, arg):
            ''' did we move mouse over that window or wrote something in message
            textview in the last 30 seconds?
            if yes we go active
            if no we go inactive '''
            contact = self.contact
            jid = contact.jid

            current_state = contact.our_chatstate
            if current_state is False: # jid doesn't support chatstates
                  return False # stop looping

            if self.mouse_over_in_last_5_secs or self.kbd_activity_in_last_5_secs:
                  return True # loop forever

            if not self.mouse_over_in_last_30_secs or self.kbd_activity_in_last_30_secs:
                  self.send_chatstate('inactive', contact)

            # assume no activity and let the motion-notify or 'insert-text' make them True
            # refresh 30 seconds too or else it's 30 - 5 = 25 seconds!
            self.reset_kbd_mouse_timeout_vars()
            return True # loop forever

      def reset_kbd_mouse_timeout_vars(self):
            self.kbd_activity_in_last_5_secs = False
            self.mouse_over_in_last_5_secs = False
            self.mouse_over_in_last_30_secs = False
            self.kbd_activity_in_last_30_secs = False

01061       def print_conversation(self, text, frm = '', tim = None,
            encrypted = False, subject = None):
            '''Print a line in the conversation:
            if contact is set to status: it's a status message
            if contact is set to another value: it's an outgoing message
            if contact is set to print_queue: it is incomming from queue
            if contact is not set: it's an incomming message'''
            contact = self.contact
            jid = contact.jid

            if frm == 'status':
                  kind = 'status'
                  name = ''
            elif frm == 'info':
                  kind = 'info'
                  name = ''
            else:
                  ec = gajim.encrypted_chats[self.account]
                  if encrypted and jid not in ec:
                        msg = _('Encryption enabled')
                        ChatControlBase.print_conversation_line(self, msg, 
                              'status', '', tim)
                        ec.append(jid)
                  elif not encrypted and jid in ec:
                        msg = _('Encryption disabled')
                        ChatControlBase.print_conversation_line(self, msg,
                              'status', '', tim)
                        ec.remove(jid)
                  self.xml.get_widget('gpg_togglebutton').set_active(encrypted)
                  if not frm:
                        kind = 'incoming'
                        name = contact.get_shown_name()
                  elif frm == 'print_queue': # incoming message, but do not update time
                        kind = 'incoming_queue'
                        name = contact.get_shown_name()
                  else:
                        kind = 'outgoing'
                        name = gajim.nicks[self.account] 
            ChatControlBase.print_conversation_line(self, text, kind, name, tim,
                  subject = subject)

01102       def get_tab_label(self, chatstate):
            unread = ''
            num_unread = self.nb_unread
            if num_unread == 1 and not gajim.config.get('show_unread_tab_icon'):
                  unread = '*'
            elif num_unread > 1:
                  unread = '[' + unicode(num_unread) + ']'

            # Draw tab label using chatstate 
            theme = gajim.config.get('roster_theme')
            color = None
            if chatstate is not None:
                  if chatstate == 'composing':
                        color = gajim.config.get_per('themes', theme,
                                    'state_composing_color')
                  elif chatstate == 'inactive':
                        color = gajim.config.get_per('themes', theme,
                                    'state_inactive_color')
                  elif chatstate == 'gone':
                        color = gajim.config.get_per('themes', theme,
                                    'state_gone_color')
                  elif chatstate == 'paused':
                        color = gajim.config.get_per('themes', theme,
                                    'state_paused_color')
                  else:
                        color = gajim.config.get_per('themes', theme,
                                    'state_active_color')
            if color:
                  # We set the color for when it's the current tab or not
                  color = gtk.gdk.colormap_get_system().alloc_color(color)
                  # In inactive tab color to be lighter against the darker inactive
                  # background
                  if chatstate in ('inactive', 'gone') and\
                  self.parent_win.get_active_control() != self:
                        color = self.lighten_color(color)

            name = self.contact.get_shown_name()
            if self.resource:
                  name += '/' + self.resource
            label_str = gtkgui_helpers.escape_for_pango_markup(name)
            if num_unread: # if unread, text in the label becomes bold
                  label_str = '<b>' + unread + label_str + '</b>'
            return (label_str, color)

01146       def get_tab_image(self):
            num_unread = self.nb_unread
            # Set tab image (always 16x16); unread messages show the 'message' image
            tab_img = None
            
            if num_unread and gajim.config.get('show_unread_tab_icon'):
                  img_16 = gajim.interface.roster.get_appropriate_state_images(
                        self.contact.jid, icon_name = 'message')
                  tab_img = img_16['message']
            else:
                  contact = gajim.contacts.get_contact_with_highest_priority(self.account,
                        self.contact.jid)
                  if not contact or self.resource:
                        # For transient contacts
                        contact = self.contact
                  img_16 = gajim.interface.roster.get_appropriate_state_images(
                        self.contact.jid, icon_name = contact.show)
                  tab_img = img_16[contact.show]

            return tab_img

01167       def prepare_context_menu(self):
            '''sets compact view menuitem active state
            sets active and sensitivity state for toggle_gpg_menuitem
            sets sensitivity for history_menuitem (False for tranasports)
            and file_transfer_menuitem
            and hide()/show() for add_to_roster_menuitem
            '''
            xml = gtk.glade.XML(GTKGUI_GLADE, 'chat_control_popup_menu', APP)
            menu = xml.get_widget('chat_control_popup_menu')
            
            history_menuitem = xml.get_widget('history_menuitem')
            toggle_gpg_menuitem = xml.get_widget('toggle_gpg_menuitem')
            add_to_roster_menuitem = xml.get_widget('add_to_roster_menuitem')
            send_file_menuitem = xml.get_widget('send_file_menuitem')
            compact_view_menuitem = xml.get_widget('compact_view_menuitem')
            information_menuitem = xml.get_widget('information_menuitem')
            
            contact = self.parent_win.get_active_contact()
            jid = contact.jid
            
            # history_menuitem
            if gajim.jid_is_transport(jid):
                  history_menuitem.set_sensitive(False)
            
            # check if gpg capabitlies or else make gpg toggle insensitive
            gpg_btn = self.xml.get_widget('gpg_togglebutton')
            isactive = gpg_btn.get_active()
            is_sensitive = gpg_btn.get_property('sensitive')
            toggle_gpg_menuitem.set_active(isactive)
            toggle_gpg_menuitem.set_property('sensitive', is_sensitive)
            
            # If we don't have resource, we can't do file transfer
            # in transports, contact holds our info we need to disable it too
            if contact.resource and contact.jid.find('@') != -1:
                  send_file_menuitem.set_sensitive(True)
            else:
                  send_file_menuitem.set_sensitive(False)
            
            # compact_view_menuitem
            compact_view_menuitem.set_active(self.hide_chat_buttons_current)
            
            # add_to_roster_menuitem
            if _('Not in Roster') in contact.groups:
                  add_to_roster_menuitem.show()
                  add_to_roster_menuitem.set_no_show_all(False)
            else:
                  add_to_roster_menuitem.hide()
                  add_to_roster_menuitem.set_no_show_all(True)
            
            
            # connect signals
            id = history_menuitem.connect('activate', 
                  self._on_history_menuitem_activate)
            self.handlers[id] = history_menuitem
            id = send_file_menuitem.connect('activate', 
                  self._on_send_file_menuitem_activate)
            self.handlers[id] = send_file_menuitem 
            id = compact_view_menuitem.connect('activate', 
                  self._on_compact_view_menuitem_activate)
            self.handlers[id] = compact_view_menuitem 
            id = add_to_roster_menuitem.connect('activate', 
                  self._on_add_to_roster_menuitem_activate)
            self.handlers[id] = add_to_roster_menuitem 
            id = toggle_gpg_menuitem.connect('activate', 
                  self._on_toggle_gpg_menuitem_activate)
            self.handlers[id] = toggle_gpg_menuitem 
            id = information_menuitem.connect('activate', 
                  self._on_contact_information_menuitem_activate)
            self.handlers[id] = information_menuitem
            menu.connect('selection-done', lambda w:w.destroy())  
            return menu

01239       def send_chatstate(self, state, contact = None):
            ''' sends OUR chatstate as STANDLONE chat state message (eg. no body)
            to contact only if new chatstate is different from the previous one
            if jid is not specified, send to active tab'''
            # JEP 85 does not allow resending the same chatstate
            # this function checks for that and just returns so it's safe to call it
            # with same state.
            
            # This functions also checks for violation in state transitions
            # and raises RuntimeException with appropriate message
            # more on that http://www.jabber.org/jeps/jep-0085.html#statechart

            # do not send nothing if we have chat state notifications disabled
            # that means we won't reply to the <active/> from other peer
            # so we do not broadcast jep85 capabalities
            chatstate_setting = gajim.config.get('chat_state_notifications')
            if chatstate_setting == 'disabled':
                  return
            elif chatstate_setting == 'composing_only' and state != 'active' and\
                  state != 'composing':
                  return

            if contact is None:
                  contact = self.parent_win.get_active_contact()
                  if contact is None:
                        # contact was from pm in MUC, and left the room so contact is None
                        # so we cannot send chatstate anymore
                        return
            jid = contact.jid

            # Don't send chatstates to offline contacts
            if contact.show == 'offline':
                  return

            if contact.composing_jep is False: # jid cannot do jep85 nor jep22
                  return

            # if the new state we wanna send (state) equals 
            # the current state (contact.our_chatstate) then return
            if contact.our_chatstate == state:
                  return

            if contact.composing_jep is None:
                  # we don't know anything about jid, so return
                  # NOTE:
                  # send 'active', set current state to 'ask' and return is done
                  # in self.send_message() because we need REAL message (with <body>)
                  # for that procedure so return to make sure we send only once
                  # 'active' until we know peer supports jep85
                  return 

            if contact.our_chatstate == 'ask':
                  return

            # in JEP22, when we already sent stop composing
            # notification on paused, don't resend it
            if contact.composing_jep == 'JEP-0022' and \
            contact.our_chatstate in ('paused', 'active', 'inactive') and \
            state is not 'composing': # not composing == in (active, inactive, gone)
                  contact.our_chatstate = 'active'
                  self.reset_kbd_mouse_timeout_vars()
                  return

            # prevent going paused if we we were not composing (JEP violation)
            if state == 'paused' and not contact.our_chatstate == 'composing':
                  MessageControl.send_message(self, None, chatstate = 'active') # go active before
                  contact.our_chatstate = 'active'
                  self.reset_kbd_mouse_timeout_vars()
            
            # if we're inactive prevent composing (JEP violation)
            elif contact.our_chatstate == 'inactive' and state == 'composing':
                  MessageControl.send_message(self, None, chatstate = 'active') # go active before
                  contact.our_chatstate = 'active'
                  self.reset_kbd_mouse_timeout_vars()

            MessageControl.send_message(self, None, chatstate = state, msg_id = contact.msg_id,
                                                      composing_jep = contact.composing_jep)
            contact.our_chatstate = state
            if contact.our_chatstate == 'active':
                  self.reset_kbd_mouse_timeout_vars()

      def shutdown(self):
            # destroy banner tooltip - bug #pygtk for that!
            self.status_tooltip.destroy()
            # Send 'gone' chatstate
            self.send_chatstate('gone', self.contact)
            self.contact.chatstate = None
            self.contact.our_chatstate = None
            # Disconnect timer callbacks
            gobject.source_remove(self.possible_paused_timeout_id)
            gobject.source_remove(self.possible_inactive_timeout_id)
            # Clean up systray
            if gajim.interface.systray_enabled and self.nb_unread > 0:
                  gajim.interface.systray.remove_jid(self.contact.jid, self.account,
                                                self.type_id)
            # remove all register handlers on wigets, created by self.xml
            # to prevent circular references among objects
            for i in self.handlers.keys():
                  if self.handlers[i].handler_is_connected(i):
                        self.handlers[i].disconnect(i)
                  del self.handlers[i]
            self.conv_textview.del_handlers()
            self.msg_textview.destroy()
            

01344       def allow_shutdown(self):
            if time.time() - gajim.last_message_time[self.account]\
            [self.get_full_jid()] < 2:
                  # 2 seconds
                  dialog = dialogs.ConfirmationDialog(
                        #%s is being replaced in the code with JID
                        _('You just received a new message from "%s"' % self.contact.jid),
                        _('If you close this tab and you have history disabled, '\
                        'this message will be lost.'))
                  if dialog.get_response() != gtk.RESPONSE_OK:
                        return False #stop the propagation of the event
            return True

01357       def handle_incoming_chatstate(self):
            ''' handle incoming chatstate that jid SENT TO us '''
            self.draw_banner()
            # update chatstate in tab for this chat
            self.parent_win.redraw_tab(self, self.contact.chatstate)

01363       def set_control_active(self, state):
            ChatControlBase.set_control_active(self, state)
            # send chatstate inactive to the one we're leaving
            # and active to the one we visit
            if state:
                  self.send_chatstate('active', self.contact)
            else:
                  self.send_chatstate('inactive', self.contact)

      def show_avatar(self, resource = None):
            if not gajim.config.get('show_avatar_in_chat'):
                  return

            jid = self.contact.jid
            jid_with_resource = jid
            if resource:
                  jid_with_resource += '/' + resource

            # we assume contact has no avatar
            scaled_pixbuf = None

            pixbuf = None
            is_fake = False
            if gajim.contacts.is_pm_from_jid(self.account, jid):
                  is_fake = True
            pixbuf = gtkgui_helpers.get_avatar_pixbuf_from_cache(jid_with_resource,
                  is_fake)
            if pixbuf == 'ask':
                  # we don't have the vcard
                  gajim.connections[self.account].request_vcard(jid_with_resource,
                        is_fake)
                  return
            if pixbuf is not None:
                  scaled_pixbuf = gtkgui_helpers.get_scaled_pixbuf(pixbuf, 'chat')

            image = self.xml.get_widget('avatar_image')
            image.set_from_pixbuf(scaled_pixbuf)
            image.show_all()

      def _on_drag_data_received(self, widget, context, x, y, selection,
            target_type, timestamp):
            # If not resource, we can't send file
            if not self.contact.resource:
                  return
            if target_type == self.TARGET_TYPE_URI_LIST:
                  uri = selection.data.strip()
                  uri_splitted = uri.split() # we may have more than one file dropped
                  for uri in uri_splitted:
                        path = helpers.get_file_path_from_dnd_dropped_uri(uri)
                        if os.path.isfile(path): # is it file?
                              ft = gajim.interface.instances['file_transfers']
                              ft.send_file(self.account, self.contact, path)

      def _on_message_tv_buffer_changed(self, textbuffer):
            self.kbd_activity_in_last_5_secs = True
            self.kbd_activity_in_last_30_secs = True
            if textbuffer.get_char_count():
                  self.send_chatstate('composing', self.contact)
            else:
                  self.send_chatstate('active', self.contact)

      def restore_conversation(self):
            jid = self.contact.jid
            # don't restore lines if it's a transport
            if gajim.jid_is_transport(jid):
                  return

            # How many lines to restore and when to time them out
            restore_how_many = gajim.config.get('restore_lines')
            if restore_how_many <= 0:
                  return
            timeout = gajim.config.get('restore_timeout') # in minutes
            # number of messages that are in queue and are already logged
            pending_how_many = 0 # we want to avoid duplication

            if gajim.awaiting_events[self.account].has_key(jid):
                  events = gajim.awaiting_events[self.account][jid]
                  for event in events:
                        if event[0] == 'chat':
                              pending_how_many += 1

            rows = gajim.logger.get_last_conversation_lines(jid, restore_how_many,
                  pending_how_many, timeout)
            
            for row in rows: # row[0] time, row[1] has kind, row[2] the message
                  if not row[2]: # message is empty, we don't print it
                        continue
                  if row[1] in (constants.KIND_CHAT_MSG_SENT,
                              constants.KIND_SINGLE_MSG_SENT):
                        kind = 'outgoing'
                        name = gajim.nicks[self.account]
                  elif row[1] in (constants.KIND_SINGLE_MSG_RECV,
                              constants.KIND_CHAT_MSG_RECV):
                        kind = 'incoming'
                        name = self.contact.get_shown_name()

                  tim = time.localtime(float(row[0]))

                  ChatControlBase.print_conversation_line(self, row[2], kind, name, tim,
                                                ['small'],
                                                ['small', 'restored_message'],
                                                ['small', 'restored_message'],
                                                False)
            if len(rows):
                  self.conv_textview.print_empty_line()

01469       def read_queue(self):
            '''read queue and print messages containted in it'''
            jid = self.contact.jid
            jid_with_resource = jid
            if self.resource:
                  jid_with_resource += '/' + self.resource
            l = gajim.awaiting_events[self.account][jid_with_resource]

            # Is it a pm ?
            is_pm = False
            room_jid, nick = gajim.get_room_and_nick_from_fjid(jid)
            control = gajim.interface.msg_win_mgr.get_control(room_jid, self.account)
            if control and control.type_id == message_control.TYPE_GC:
                  is_pm = True
            events_to_keep = []
            # list of message ids which should be marked as read
            message_ids = []
            for event in l:
                  typ = event[0]
                  if typ != 'chat':
                        events_to_keep.append(event)
                        continue
                  data = event[1]
                  kind = data[2]
                  if kind == 'error':
                        kind = 'info'
                  else:
                        kind = 'print_queue'
                  self.print_conversation(data[0], kind, tim = data[3],
                                    encrypted = data[4], subject = data[1])
                  if len(data) > 6 and isinstance(data[6], int):
                        message_ids.append(data[6])
                  # remove from gc nb_unread if it's pm or from roster
                  if is_pm:
                        control.nb_unread -= 1
                  else:
                        gajim.interface.roster.nb_unread -= 1
            if message_ids:
                  gajim.logger.set_read_messages(message_ids)
            if is_pm:
                  control.parent_win.show_title()
            else:
                  gajim.interface.roster.show_title()
            # Keep only non-messages events
            if len(events_to_keep):
                  gajim.awaiting_events[self.account][jid_with_resource] = events_to_keep
            else:
                  del gajim.awaiting_events[self.account][jid_with_resource]
            typ = 'chat' # Is it a normal chat or a pm ?
            # reset to status image in gc if it is a pm
            if is_pm:
                  control.update_ui()
                  typ = 'pm'

            gajim.interface.roster.draw_contact(jid, self.account)
            # Redraw parent too
            gajim.interface.roster.draw_parent_contact(jid, self.account)
            if gajim.interface.systray_enabled:
                  gajim.interface.systray.remove_jid(jid_with_resource, self.account, typ)
            if (self.contact.show == 'offline' or self.contact.show == 'error'):
                  showOffline = gajim.config.get('showoffline')
                  if not showOffline and typ == 'chat' and \
                  len(gajim.contacts.get_contact(self.account, jid)) < 2:
                        gajim.interface.roster.really_remove_contact(self.contact,
                              self.account)
                  elif typ == 'pm':
                        control.remove_contact(nick)

01537       def show_bigger_avatar(self, small_avatar):
            '''resizes the avatar, if needed, so it has at max half the screen size
            and shows it'''
            is_fake = False
            if self.type_id == message_control.TYPE_PM:
                  is_fake = True
            avatar_pixbuf = gtkgui_helpers.get_avatar_pixbuf_from_cache(
                  self.contact.jid, is_fake)
            if avatar_pixbuf in ('ask', None):
                  return
            # Hide the small avatar
            # this code hides the small avatar when we show a bigger one in case
            # the avatar has a transparency hole in the middle
            # so when we show the big one we avoid seeing the small one behind.
            # It's why I set it transparent.
            image = self.xml.get_widget('avatar_image')
            pixbuf = image.get_pixbuf()
            pixbuf.fill(0xffffff00) # RGBA
            image.queue_draw()

            screen_w = gtk.gdk.screen_width()
            screen_h = gtk.gdk.screen_height()
            avatar_w = avatar_pixbuf.get_width()
            avatar_h = avatar_pixbuf.get_height()
            half_scr_w = screen_w / 2
            half_scr_h = screen_h / 2
            if avatar_w > half_scr_w:
                  avatar_w = half_scr_w
            if avatar_h > half_scr_h:
                  avatar_h = half_scr_h
            window = gtk.Window(gtk.WINDOW_POPUP)
            self.bigger_avatar_window = window
            pixmap, mask = avatar_pixbuf.render_pixmap_and_mask()
            window.set_size_request(avatar_w, avatar_h)
            # we should make the cursor visible
            # gtk+ doesn't make use of the motion notify on gtkwindow by default
            # so this line adds that
            window.set_events(gtk.gdk.POINTER_MOTION_MASK)
            window.set_app_paintable(True)
            
            window.realize()
            window.window.set_back_pixmap(pixmap, False) # make it transparent
            window.window.shape_combine_mask(mask, 0, 0)

            # make the bigger avatar window show up centered 
            x0, y0 = small_avatar.window.get_origin()
            x0 += small_avatar.allocation.x
            y0 += small_avatar.allocation.y
            center_x= x0 + (small_avatar.allocation.width / 2)
            center_y = y0 + (small_avatar.allocation.height / 2)
            pos_x, pos_y = center_x - (avatar_w / 2), center_y - (avatar_h / 2) 
            window.move(pos_x, pos_y)
            # make the cursor invisible so we can see the image
            invisible_cursor = gtkgui_helpers.get_invisible_cursor()
            window.window.set_cursor(invisible_cursor)

            # we should hide the window
            window.connect('leave_notify_event',
                  self._on_window_avatar_leave_notify_event)
            window.connect('motion-notify-event',
                  self._on_window_motion_notify_event)

            window.show_all()

01601       def _on_window_avatar_leave_notify_event(self, widget, event):
            '''we just left the popup window that holds avatar'''
            self.bigger_avatar_window.destroy()
            # Re-show the small avatar
            self.show_avatar()

01607       def _on_window_motion_notify_event(self, widget, event):
            '''we just moved the mouse so show the cursor'''
            cursor = gtk.gdk.Cursor(gtk.gdk.LEFT_PTR)
            self.bigger_avatar_window.window.set_cursor(cursor)

      def _on_send_file_menuitem_activate(self, widget):
            gajim.interface.instances['file_transfers'].show_file_send_request( 
                  self.account, self.contact)

      def _on_add_to_roster_menuitem_activate(self, widget):
            dialogs.AddNewContactWindow(self.account, self.contact.jid)

      def _on_contact_information_menuitem_activate(self, widget):
            gajim.interface.roster.on_info(widget, self.contact, self.account)

      def _on_toggle_gpg_menuitem_activate(self, widget):
            # update the button
            # this is reverse logic, as we are on 'activate' (before change happens)
            tb = self.xml.get_widget('gpg_togglebutton')
            tb.set_active(not tb.get_active())

      def got_connected(self):
            ChatControlBase.got_connected(self)
            # Refreshing contact
            contact = gajim.contacts.get_contact_with_highest_priority(
                  self.account, self.contact.jid)
            if isinstance(contact, GC_Contact):
                  contact = gajim.contacts.contact_from_gc_contact(contact)
            if contact:
                  self.contact = contact
            self.draw_banner()

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