--- a/frontends/src/quick_frontend/quick_app.py	Tue Mar 03 06:00:23 2015 +0100
+++ b/frontends/src/quick_frontend/quick_app.py	Tue Mar 03 15:05:10 2015 +0100
@@ -22,6 +22,7 @@
 
 from sat.core.i18n import _
 from sat.core import exceptions
+from sat.tools.misc import TriggerManager
 
 from sat_frontends.tools import jid
 from sat_frontends.quick_frontend.quick_widgets import QuickWidgetsManager
@@ -219,6 +220,9 @@
         # listeners
         self._listeners = {} # key: listener type ("avatar", "selected", etc), value: list of callbacks
 
+        # triggers
+        self.trigger = TriggerManager()  # trigger are used to change the default behaviour
+
         ## bridge ##
         try:
             self.bridge = create_bridge()
@@ -453,6 +457,10 @@
     def newMessageHandler(self, from_jid_s, msg, type_, to_jid_s, extra, profile):
         from_jid = jid.JID(from_jid_s)
         to_jid = jid.JID(to_jid_s)
+
+        if not self.trigger.point("newMessageTrigger", from_jid, msg, type_, to_jid, extra, profile=profile):
+            return
+
         from_me = from_jid.bare == self.profiles[profile].whoami.bare
         target = to_jid if from_me else from_jid
 
@@ -486,7 +494,11 @@
             callback = lambda dummy=None: None # FIXME: optional argument is here because pyjamas doesn't support callback without arg with json proxy
         if errback is None:
             errback = lambda failure: self.showDialog(failure.fullname, failure.message, "error")
-        self.bridge.sendMessage(to_jid, message, subject, mess_type, extra, profile_key, callback=callback, errback=errback)
+
+        if not self.trigger.point("sendMessageTrigger", to_jid, message, subject, mess_type, extra, callback, errback, profile_key=profile_key):
+            return
+
+        self.bridge.sendMessage(unicode(to_jid), message, subject, mess_type, extra, profile_key, callback=callback, errback=errback)
 
     def newAlertHandler(self, msg, title, alert_type, profile):
         assert alert_type in ['INFO', 'ERROR']

--- a/src/tools/misc.py	Tue Mar 03 06:00:23 2015 +0100
+++ b/src/tools/misc.py	Tue Mar 03 15:05:10 2015 +0100
@@ -20,7 +20,6 @@
 """Misc usefull classes"""
 
 from sat.core.i18n import _
-import sys
 from sat.core.log import getLogger
 log = getLogger(__name__)
 
@@ -39,8 +38,13 @@
     """This class manage triggers: code which interact to change the behaviour
     of SàT"""
 
-    MIN_PRIORITY = float('-inf')
-    MAX_PRIORITY = float('+inf')
+    try:  # FIXME: to be removed when a better solution is found
+        MIN_PRIORITY = float('-inf')
+        MAX_PRIORITY = float('+inf')
+    except:  # XXX: Pyjamas will bug if you specify ValueError here
+        # Pyjamas uses the JS Float class
+        MIN_PRIORITY = Number.NEGATIVE_INFINITY
+        MAX_PRIORITY = Number.POSITIVE_INFINITY
 
     def __init__(self):
         self.__triggers = {}
@@ -81,7 +85,7 @@
         if point_name not in self.__triggers:
             return True
 
-        for priority,trigger in self.__triggers[point_name]:
+        for priority, trigger in self.__triggers[point_name]:
             try:
                 if not trigger(*args, **kwargs):
                     return False