ENH: Deal with multiline input.

IPython/frontend/wx/console_widget.py

@@ -22,6 +22,8 b' __docformat__ = "restructuredtext en"'
 import wx
 import wx.stc  as  stc
 
+from wx.py import editwindow
+
 import re
 
 # FIXME: Need to provide an API for non user-generated display on the
@@ -64,7 +66,7 b' _TRACE_STYLE = 17'
 #-------------------------------------------------------------------------------
 # The console widget class
 #-------------------------------------------------------------------------------
-class ConsoleWidget(stc.StyledTextCtrl):
+class ConsoleWidget(editwindow.EditWindow):
     """ Specialized styled text control view for console-like workflow.
 
         This widget is mainly interested in dealing with the prompt and
@@ -100,7 +102,8 b' class ConsoleWidget(stc.StyledTextCtrl):'
             'IPYTHON' show autocompletion the ipython way
             'STC" show it scintilla text control way
         """
-        stc.StyledTextCtrl.__init__(self, parent, id, pos, size, style)
+        #stc.StyledTextCtrl.__init__(self, parent, id, pos, size, style)
+        editwindow.EditWindow.__init__(self, parent, id, pos, size, style)
         self.configure_scintilla()
 
         # FIXME: we need to retrieve this from the interpreter.

IPython/frontend/wx/wx_frontend.py

@@ -22,7 +22,7 b' __docformat__ = "restructuredtext en"'
 
 import wx
 from console_widget import ConsoleWidget
-
+import re
 
 import IPython
 from IPython.kernel.engineservice import EngineService
@@ -41,6 +41,14 b' class IPythonWxController(FrontEndBase, ConsoleWidget):'
     output_prompt = \
     '\n\x01\x1b[0;31m\x02Out[\x01\x1b[1;31m\x02%i\x01\x1b[0;31m\x02]: \x01\x1b[0m\x02'
    
+    # Are we entering multi line input?
+    multi_line_input = False
+
+    # The added tab stop to the string. It may, for instance, come from 
+    # copy and pasting something with tabs.
+    tab_stop = 0
+    # FIXME: We still have to deal with this.
+
     #--------------------------------------------------------------------------
     # Public API
     #--------------------------------------------------------------------------
@@ -121,9 +129,34 b' class IPythonWxController(FrontEndBase, ConsoleWidget):'
         """ Called when the return key is pressed in a line editing
             buffer.
         """
-        result = self.engine.shell.execute(self.get_current_edit_buffer())
+        current_buffer = self.get_current_edit_buffer()
+        current_buffer = current_buffer.replace('\r\n', '\n')
+        current_buffer = current_buffer.replace('\t', 4*' ')
+        if (    not self.multi_line_input
+                or re.findall(r"\n[\t ]*\n[\t ]*$", current_buffer)):
+            if self.is_complete(current_buffer):
+                result = self.engine.shell.execute(current_buffer)
         self.render_result(result)
         self.new_prompt(self.prompt % result['number'])
+                self.multi_line_input = False
+            else:
+                if self.multi_line_input:
+                    self.write(self._get_indent_string(current_buffer[:-1]))
+                else:
+                    self.multi_line_input = True
+                    self.write('\t')
+        else:
+            self.write(self._get_indent_string(current_buffer[:-1]))
+
+
+    def _get_indent_string(self, string):
+        string = string.split('\n')[-1]
+        indent_chars = len(string) - len(string.lstrip())
+        indent_string = '\t'*(indent_chars // 4) + \
+                            ' '*(indent_chars % 4)
+
+        return indent_string
+ 
 
 
 if __name__ == '__main__':