##	message_control.py
##
## Copyright (C) 2006 Travis Shirk <travis@pobox.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 gtk
import gtk.glade

from common import gajim

# Derived types MUST register their type IDs here if custom behavor is required
TYPE_CHAT = 'chat'
TYPE_GC = 'gc'
TYPE_PM = 'pm'

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

GTKGUI_GLADE = 'gtkgui.glade'
####################

class MessageControl:
	'''An abstract base widget that can embed in the gtk.Notebook of a MessageWindow'''

	def __init__(self, type_id, parent_win, widget_name, display_names, contact, account, resource = None):
		'''The display_names argument is a two element tuple containing the desired
		display name (pretty string) for the control in both singular and plural form'''
		# dict { cb id : widget} 
		# keep all registered callbacks of widgets, created by self.xml
		self.handlers = {} 
		self.type_id = type_id
		self.parent_win = parent_win
		self.widget_name = widget_name
		self.display_names = display_names
		self.contact = contact
		self.account = account
		self.hide_chat_buttons_always = False
		self.hide_chat_buttons_current = False
		self.nb_unread = 0
		self.resource = resource

		gajim.last_message_time[self.account][self.get_full_jid()] = 0

		self.xml = gtk.glade.XML(GTKGUI_GLADE, widget_name, APP)
		self.widget = self.xml.get_widget(widget_name)

	def get_full_jid(self):
		fjid = self.contact.jid
		if self.resource:
			fjid += '/' + self.resource
		return fjid

	def set_control_active(self, state):
		'''Called when the control becomes active (state is True)
		or inactive (state is False)'''
		pass  # Derived types MUST implement this method

	def allow_shutdown(self):
		'''Called to check is a control is allowed to shutdown.
		If a control is not in a suitable shutdown state this method
		should return False'''
		# NOTE: Derived classes MAY implement this
		return True

	def shutdown(self):
		# NOTE: Derived classes MUST implement this
		pass

	def notify_on_new_messages(self):
		# NOTE: Derived classes MUST implement this
		return False

	def repaint_themed_widgets(self, theme):
		pass # NOTE: Derived classes SHOULD implement this

	def update_ui(self):
		pass # NOTE: Derived classes SHOULD implement this

	def toggle_emoticons(self):
		pass # NOTE: Derived classes MAY implement this

	def update_font(self):
		pass # NOTE: Derived classes SHOULD implement this

	def update_tags(self):
		pass # NOTE: Derived classes SHOULD implement this

	def get_tab_label(self, chatstate):
		'''Return a suitable the tab label string.  Returns a tuple such as:
		(label_str, color) either of which can be None
		if chatstate is given that means we have HE SENT US a chatstate and
		we want it displayed'''
		# NOTE: Derived classes MUST implement this
		# Return a markup'd label and optional gtk.Color in a tupple like:
		#return (label_str, None)
		pass

	def get_tab_image(self):
		'''Return a suitable tab image for display.  None clears any current label.'''
		return None

	def prepare_context_menu(self):
		# NOTE: Derived classes SHOULD implement this
		return None

	def chat_buttons_set_visible(self, state):
		# NOTE: Derived classes MAY implement this
		self.hide_chat_buttons_current = state

	def got_connected(self):
		pass

	def got_disconnected(self):
		pass

	def get_specific_unread(self):
		n = 0
		if gajim.awaiting_events[self.account].has_key(self.contact.jid):
			n = len(gajim.awaiting_events[self.account][self.contact.jid])
		return n

	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'''
		jid = self.contact.jid
		# Send and update history
		gajim.connections[self.account].send_message(jid, message, keyID,
						type = type, chatstate = chatstate, msg_id = msg_id,
						composing_jep = composing_jep, resource = self.resource)