##// END OF EJS Templates
ENH: Deal with multiline input.
ENH: Deal with multiline input.

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wx_frontend.py
180 lines | 5.6 KiB | text/x-python | PythonLexer
# encoding: utf-8
# -*- test-case-name: ipython1.frontend.cocoa.tests.test_cocoa_frontend -*-
"""Classes to provide a Wx frontend to the
ipython1.kernel.engineservice.EngineService.
"""
__docformat__ = "restructuredtext en"
#-------------------------------------------------------------------------------
# Copyright (C) 2008 The IPython Development Team
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
#-------------------------------------------------------------------------------
#-------------------------------------------------------------------------------
# Imports
#-------------------------------------------------------------------------------
import wx
from console_widget import ConsoleWidget
import re
import IPython
from IPython.kernel.engineservice import EngineService
from IPython.frontend.frontendbase import FrontEndBase
#-------------------------------------------------------------------------------
# Classes to implement the Wx frontend
#-------------------------------------------------------------------------------
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
#--------------------------------------------------------------------------
def __init__(self, parent, id=wx.ID_ANY, pos=wx.DefaultPosition,
size=wx.DefaultSize, style=wx.CLIP_CHILDREN,
*args, **kwds):
""" Create Shell instance.
"""
ConsoleWidget.__init__(self, parent, id, pos, size, style)
FrontEndBase.__init__(self, engine=EngineService())
self.lines = {}
# Start the IPython engine
self.engine.startService()
# Capture Character keys
self.Bind(wx.EVT_KEY_UP, self._on_key_up)
#FIXME: print banner.
banner = """IPython1 %s -- An enhanced Interactive Python.""" \
% IPython.__version__
def appWillTerminate_(self, notification):
"""appWillTerminate"""
self.engine.stopService()
def complete(self, token):
"""Complete token in engine's user_ns
Parameters
----------
token : string
Result
------
Deferred result of
IPython.kernel.engineservice.IEngineBase.complete
"""
return self.engine.complete(token)
def render_result(self, result):
if 'stdout' in result:
self.write(result['stdout'])
if 'display' in result:
self.write(self.output_prompt % result['number']
+ result['display']['pprint'])
def render_error(self, failure):
self.insert_text('\n\n'+str(failure)+'\n\n')
return failure
#--------------------------------------------------------------------------
# Private API
#--------------------------------------------------------------------------
def _on_key_up(self, event, skip=True):
""" Capture the character events, let the parent
widget handle them, and put our logic afterward.
"""
event.Skip()
# Capture enter
if event.KeyCode == 13 and \
event.Modifiers in (wx.MOD_NONE, wx.MOD_WIN):
self._on_enter()
def _on_enter(self):
""" Called when the return key is pressed in a line editing
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__':
class MainWindow(wx.Frame):
def __init__(self, parent, id, title):
wx.Frame.__init__(self, parent, id, title, size=(300,250))
self._sizer = wx.BoxSizer(wx.VERTICAL)
self.shell = IPythonWxController(self)
self._sizer.Add(self.shell, 1, wx.EXPAND)
self.SetSizer(self._sizer)
self.SetAutoLayout(1)
self.Show(True)
app = wx.PySimpleApp()
frame = MainWindow(None, wx.ID_ANY, 'Ipython')
frame.shell.SetFocus()
frame.SetSize((780, 460))
shell = frame.shell
# app.MainLoop()