From cd29967c2ece4e5569bbc5e11752e415ab971fda Mon Sep 17 00:00:00 2001
From: Marco Pesenti Gritti <marco@localhost.localdomain>
Date: Thu, 19 Oct 2006 15:22:42 +0200
Subject: [PATCH] Refactor a bit to keep host independent from the shell

---
 shell/view/ActivityHost.py | 18 ++++++------------
 shell/view/Shell.py        | 26 +++++++++++++++++++++-----
 sugar/chat/ActivityChat.py |  3 ++-
 3 files changed, 29 insertions(+), 18 deletions(-)

diff --git a/shell/view/ActivityHost.py b/shell/view/ActivityHost.py
index eacb30ff..61b7078d 100644
--- a/shell/view/ActivityHost.py
+++ b/shell/view/ActivityHost.py
@@ -42,9 +42,7 @@ class ActivityChatWindow(gtk.Window):
 		self.add(chat_widget)
 
 class ActivityHost:
-	def __init__(self, shell, window):
-		self._shell = shell
-
+	def __init__(self, window):
 		self._window = window
 		self._xid = window.get_xid()
 		self._pservice = PresenceService.get_instance()
@@ -73,8 +71,6 @@ class ActivityHost:
 		self._chat_window = ActivityChatWindow(win, self._chat_widget)
 
 		self._frame_was_visible = False
-		self._shell.connect('activity-changed', self._activity_changed_cb)
-		self._shell.connect('activity-closed', self._activity_closed_cb)
 
 	def get_id(self):
 		return self._id
@@ -143,13 +139,11 @@ class ActivityHost:
 	def is_chat_visible(self):
 		return self._chat_window.get_property('visible')
 
-	def _activity_changed_cb(self, shell, activity):
-		if activity != self:
+	def set_active(self, active):
+		if not active:
 			self.chat_hide()
 			self._frame_was_visible = False
 
-	def _activity_closed_cb(self, shell, activity):
-		if activity == self:
-			self._chat_window.destroy()
-			self._frame_was_visible = False
-
+	def destroy(self):
+		self._chat_window.destroy()
+		self._frame_was_visible = False
diff --git a/shell/view/Shell.py b/shell/view/Shell.py
index b2d9d738..29305cd5 100644
--- a/shell/view/Shell.py
+++ b/shell/view/Shell.py
@@ -45,6 +45,7 @@ class Shell(gobject.GObject):
 		self._model = model
 		self._hosts = {}
 		self._screen = wnck.screen_get_default()
+		self._current_host = None
 
 		style.load_stylesheet(view.stylesheet)
 
@@ -95,7 +96,7 @@ class Shell(gobject.GObject):
 
 	def __window_opened_cb(self, screen, window):
 		if window.get_window_type() == wnck.WINDOW_NORMAL:
-			activity_host = ActivityHost(self, window)
+			activity_host = ActivityHost(window)
 			self._hosts[activity_host.get_xid()] = activity_host
 			self.emit('activity-opened', activity_host)
 
@@ -104,24 +105,39 @@ class Shell(gobject.GObject):
 
 		if window and window.get_window_type() == wnck.WINDOW_NORMAL:
 			activity_host = self._hosts[window.get_xid()]
-
 			current = self._model.get_current_activity()
 			if activity_host.get_id() == current:
 				return
 
-			self._model.set_current_activity(activity_host.get_id())
-			self.emit('activity-changed', activity_host)
+			self._set_current_activity(activity_host)
 
 	def __window_closed_cb(self, screen, window):
 		if window.get_window_type() == wnck.WINDOW_NORMAL:
 			if self._hosts.has_key(window.get_xid()):
 				host = self._hosts[window.get_xid()]
+				host.destroy()
+
 				self.emit('activity-closed', host)
 				del self._hosts[window.get_xid()]
 
 		if len(self._hosts) == 0:
+			self._set_current_activity(None)
+
+	def _set_current_activity(self, host):
+		if host:
+			self._model.set_current_activity(host.get_id())
+		else:
 			self._model.set_current_activity(None)
-			self.emit('activity-changed', None)
+
+		if self._current_host:
+			self._current_host.set_active(False)
+
+		self._current_host = host
+
+		if self._current_host:
+			self._current_host.set_active(True)
+
+		self.emit('activity-changed', host)
 
 	def get_model(self):
 		return self._model
diff --git a/sugar/chat/ActivityChat.py b/sugar/chat/ActivityChat.py
index a426abc2..18926721 100644
--- a/sugar/chat/ActivityChat.py
+++ b/sugar/chat/ActivityChat.py
@@ -63,4 +63,5 @@ class ActivityChat(GroupChat):
 		self._setup_stream(self._chat_service)
 
 	def _destroy_cb(self, widget):
-		self._pservice.unregister_service(self._chat_service)
+		if self._chat_service:
+			self._pservice.unregister_service(self._chat_service)