Put auto_rewrite functionality into a method so subclasses can do the

right thing.

The zmqshell now sends the transformed inputs as a payload.
Currently our client doesn't handle this payload, but at least we
don't get the visual noise of the '> new' prompts on the screen.

We still need to implement the payload handler.

IPython/core/interactiveshell.py

@@ -1849,6 +1849,28 b' class InteractiveShell(Configurable, Magic):'
         # code out there that may rely on this).
         self.prefilter = self.prefilter_manager.prefilter_lines
 
+
+    def auto_rewrite_input(self, cmd):
+        """Print to the screen the rewritten form of the user's command.
+
+        This shows visual feedback for things like::
+        
+            In [1]: /f x
+            ------> f(x)
+
+        Which helps the user understand that the input line was transformed
+        automatically.
+        """
+        rw = self.displayhook.prompt1.auto_rewrite() + cmd
+
+        try:
+            # plain ascii works better w/ pyreadline, on some machines, so
+            # we use it and only print uncolored rewrite if we have unicode
+            rw = str(rw)
+            print >> IPython.utils.io.Term.cout, rw
+        except UnicodeEncodeError:
+            print "------> " + cmd
+            
     #-------------------------------------------------------------------------
     # Things related to extracting values/expressions from kernel and user_ns
     #-------------------------------------------------------------------------

IPython/core/prefilter.py

@@ -916,15 +916,7 b' class AutoHandler(PrefilterHandler):'
                     newcmd = '%s(%s)' % (ifun.rstrip(), the_rest)
 
         if auto_rewrite:
-            rw = self.shell.displayhook.prompt1.auto_rewrite() + newcmd
-            
-            try:
-                # plain ascii works better w/ pyreadline, on some machines, so
-                # we use it and only print uncolored rewrite if we have unicode
-                rw = str(rw)
-                print >>IPython.utils.io.Term.cout, rw
-            except UnicodeEncodeError:
-                print "-------------->" + newcmd
+            self.shell.auto_rewrite_input(newcmd)
             
         # log what is now valid Python, not the actual user input (without the
         # final newline)

IPython/core/prompts.py

@@ -385,7 +385,7 b' class Prompt1(BasePrompt):'
         return str_safe(self.p_str)
 
     def auto_rewrite(self):
-        """Print a string of the form '--->' which lines up with the previous
+        """Return a string of the form '--->' which lines up with the previous
         input string. Useful for systems which re-write the user input when
         handling automatically special syntaxes."""
 

IPython/zmq/zmqshell.py

@@ -377,7 +377,19 b' class ZMQInteractiveShell(InteractiveShell):'
     def magic_pylab(self, *args, **kwargs):
         raise NotImplementedError('pylab support must be enabled in commandl in options.')
 
+    def auto_rewrite_input(self, cmd):
+        """Called to show the auto-rewritten input for autocall and friends.
 
+        FIXME: this payload is currently not correctly processed by the
+        frontend.
+        """
+        new = self.displayhook.prompt1.auto_rewrite() + cmd
+        payload = dict(
+            source='IPython.zmq.zmqshell.ZMQInteractiveShell.auto_rewrite_input',
+            transformed_input=new,
+            )
+        self.payload_manager.write_payload(payload)
+        
     def ask_exit(self):
         """Engage the exit actions."""
         payload = dict(