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# encoding: utf-8 -*- test-case-name:
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# FIXME: Need to add tests.
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# ipython1.frontend.wx.tests.test_wx_frontend -*-
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"""Classes to provide a Wx frontend to the
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IPython.kernel.core.interpreter.
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This class inherits from ConsoleWidget, that provides a console-like
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widget to provide a text-rendering widget suitable for a terminal.
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"""
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__docformat__ = "restructuredtext en"
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#-------------------------------------------------------------------------------
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# Copyright (C) 2008 The IPython Development Team
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#
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# Distributed under the terms of the BSD License. The full license is in
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# the file COPYING, distributed as part of this software.
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#-------------------------------------------------------------------------------
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#-------------------------------------------------------------------------------
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# Imports
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#-------------------------------------------------------------------------------
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# Major library imports
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import re
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import __builtin__
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import sys
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from threading import Lock
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import wx
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from wx import stc
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# Ipython-specific imports.
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from IPython.frontend.process import PipedProcess
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from console_widget import ConsoleWidget, _COMPLETE_BUFFER_MARKER, \
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_ERROR_MARKER, _INPUT_MARKER
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from IPython.frontend.prefilterfrontend import PrefilterFrontEnd
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#-------------------------------------------------------------------------------
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# Classes to implement the Wx frontend
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#-------------------------------------------------------------------------------
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class WxController(ConsoleWidget, PrefilterFrontEnd):
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"""Classes to provide a Wx frontend to the
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IPython.kernel.core.interpreter.
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This class inherits from ConsoleWidget, that provides a console-like
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widget to provide a text-rendering widget suitable for a terminal.
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"""
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# Print debug info on what is happening to the console.
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debug = False
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# The title of the terminal, as captured through the ANSI escape
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# sequences.
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def _set_title(self, title):
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return self.Parent.SetTitle(title)
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def _get_title(self):
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return self.Parent.GetTitle()
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title = property(_get_title, _set_title)
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# The buffer being edited.
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# We are duplicating the definition here because of multiple
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# inheritence
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def _set_input_buffer(self, string):
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ConsoleWidget._set_input_buffer(self, string)
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self._colorize_input_buffer()
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def _get_input_buffer(self):
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""" Returns the text in current edit buffer.
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"""
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return ConsoleWidget._get_input_buffer(self)
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input_buffer = property(_get_input_buffer, _set_input_buffer)
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#--------------------------------------------------------------------------
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# Private Attributes
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#--------------------------------------------------------------------------
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# A flag governing the behavior of the input. Can be:
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#
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# 'readline' for readline-like behavior with a prompt
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# and an edit buffer.
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# 'raw_input' similar to readline, but triggered by a raw-input
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# call. Can be used by subclasses to act differently.
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# 'subprocess' for sending the raw input directly to a
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# subprocess.
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# 'buffering' for buffering of the input, that will be used
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# when the input state switches back to another state.
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_input_state = 'readline'
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# Attribute to store reference to the pipes of a subprocess, if we
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# are running any.
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_running_process = False
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# A queue for writing fast streams to the screen without flooding the
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# event loop
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_out_buffer = []
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# A lock to lock the _out_buffer to make sure we don't empty it
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# while it is being swapped
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_out_buffer_lock = Lock()
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# The different line markers used to higlight the prompts.
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_markers = dict()
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#--------------------------------------------------------------------------
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# Public API
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#--------------------------------------------------------------------------
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def __init__(self, parent, id=wx.ID_ANY, pos=wx.DefaultPosition,
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size=wx.DefaultSize,
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style=wx.CLIP_CHILDREN|wx.WANTS_CHARS,
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styledef=None,
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*args, **kwds):
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""" Create Shell instance.
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Parameters
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-----------
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styledef : dict, optional
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styledef is the dictionary of options used to define the
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style.
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"""
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if styledef is not None:
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self.style = styledef
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ConsoleWidget.__init__(self, parent, id, pos, size, style)
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PrefilterFrontEnd.__init__(self, **kwds)
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# Stick in our own raw_input:
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self.ipython0.raw_input = self.raw_input
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# A time for flushing the write buffer
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BUFFER_FLUSH_TIMER_ID = 100
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self._buffer_flush_timer = wx.Timer(self, BUFFER_FLUSH_TIMER_ID)
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wx.EVT_TIMER(self, BUFFER_FLUSH_TIMER_ID, self._buffer_flush)
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if 'debug' in kwds:
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self.debug = kwds['debug']
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kwds.pop('debug')
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# Inject self in namespace, for debug
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if self.debug:
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self.shell.user_ns['self'] = self
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# Inject our own raw_input in namespace
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self.shell.user_ns['raw_input'] = self.raw_input
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def raw_input(self, prompt=''):
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""" A replacement from python's raw_input.
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"""
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self.new_prompt(prompt)
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self._input_state = 'raw_input'
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if hasattr(self, '_cursor'):
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del self._cursor
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self.SetCursor(wx.StockCursor(wx.CURSOR_CROSS))
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self.__old_on_enter = self._on_enter
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event_loop = wx.EventLoop()
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def my_on_enter():
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event_loop.Exit()
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self._on_enter = my_on_enter
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# XXX: Running a separate event_loop. Ugly.
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event_loop.Run()
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self._on_enter = self.__old_on_enter
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self._input_state = 'buffering'
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self._cursor = wx.BusyCursor()
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return self.input_buffer.rstrip('\n')
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def system_call(self, command_string):
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self._input_state = 'subprocess'
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event_loop = wx.EventLoop()
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def _end_system_call():
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self._input_state = 'buffering'
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self._running_process = False
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event_loop.Exit()
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self._running_process = PipedProcess(command_string,
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out_callback=self.buffered_write,
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end_callback = _end_system_call)
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self._running_process.start()
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# XXX: Running a separate event_loop. Ugly.
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event_loop.Run()
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# Be sure to flush the buffer.
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self._buffer_flush(event=None)
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def do_calltip(self):
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""" Analyse current and displays useful calltip for it.
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"""
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if self.debug:
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print >>sys.__stdout__, "do_calltip"
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separators = re.compile('[\s\{\}\[\]\(\)\= ,:]')
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symbol = self.input_buffer
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symbol_string = separators.split(symbol)[-1]
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base_symbol_string = symbol_string.split('.')[0]
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if base_symbol_string in self.shell.user_ns:
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symbol = self.shell.user_ns[base_symbol_string]
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elif base_symbol_string in self.shell.user_global_ns:
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symbol = self.shell.user_global_ns[base_symbol_string]
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elif base_symbol_string in __builtin__.__dict__:
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symbol = __builtin__.__dict__[base_symbol_string]
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else:
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return False
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try:
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for name in symbol_string.split('.')[1:] + ['__doc__']:
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symbol = getattr(symbol, name)
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self.AutoCompCancel()
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# Check that the symbol can indeed be converted to a string:
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symbol += ''
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wx.CallAfter(self.CallTipShow, self.GetCurrentPos(), symbol)
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except:
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# The retrieve symbol couldn't be converted to a string
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pass
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def _popup_completion(self, create=False):
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""" Updates the popup completion menu if it exists. If create is
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true, open the menu.
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"""
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if self.debug:
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print >>sys.__stdout__, "_popup_completion"
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line = self.input_buffer
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if (self.AutoCompActive() and line and not line[-1] == '.') \
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or create==True:
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suggestion, completions = self.complete(line)
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if completions:
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offset = len(self._get_completion_text(line))
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self.pop_completion(completions, offset=offset)
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if self.debug:
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print >>sys.__stdout__, completions
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def buffered_write(self, text):
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""" A write method for streams, that caches the stream in order
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to avoid flooding the event loop.
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This can be called outside of the main loop, in separate
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threads.
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"""
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self._out_buffer_lock.acquire()
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self._out_buffer.append(text)
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self._out_buffer_lock.release()
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if not self._buffer_flush_timer.IsRunning():
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wx.CallAfter(self._buffer_flush_timer.Start,
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milliseconds=100, oneShot=True)
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def clear_screen(self):
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""" Empty completely the widget.
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"""
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self.ClearAll()
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self.new_prompt(self.input_prompt_template.substitute(
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number=(self.last_result['number'] + 1)))
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#--------------------------------------------------------------------------
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# LineFrontEnd interface
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#--------------------------------------------------------------------------
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def execute(self, python_string, raw_string=None):
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self._input_state = 'buffering'
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self.CallTipCancel()
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self._cursor = wx.BusyCursor()
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if raw_string is None:
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raw_string = python_string
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end_line = self.current_prompt_line \
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+ max(1, len(raw_string.split('\n'))-1)
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for i in range(self.current_prompt_line, end_line):
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if i in self._markers:
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self.MarkerDeleteHandle(self._markers[i])
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self._markers[i] = self.MarkerAdd(i, _COMPLETE_BUFFER_MARKER)
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# Use a callafter to update the display robustly under windows
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def callback():
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self.GotoPos(self.GetLength())
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PrefilterFrontEnd.execute(self, python_string,
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raw_string=raw_string)
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wx.CallAfter(callback)
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def execute_command(self, command, hidden=False):
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""" Execute a command, not only in the model, but also in the
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view.
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"""
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# XXX: This method needs to be integrated in the base fronted
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# interface
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if hidden:
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return self.shell.execute(command)
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else:
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# XXX: we are not storing the input buffer previous to the
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# execution, as this forces us to run the execution
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# input_buffer a yield, which is not good.
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##current_buffer = self.shell.control.input_buffer
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command = command.rstrip()
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if len(command.split('\n')) > 1:
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# The input command is several lines long, we need to
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# force the execution to happen
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command += '\n'
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cleaned_command = self.prefilter_input(command)
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self.input_buffer = command
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# Do not use wx.Yield() (aka GUI.process_events()) to avoid
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# recursive yields.
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self.ProcessEvent(wx.PaintEvent())
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self.write('\n')
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if not self.is_complete(cleaned_command + '\n'):
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self._colorize_input_buffer()
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self.render_error('Incomplete or invalid input')
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self.new_prompt(self.input_prompt_template.substitute(
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number=(self.last_result['number'] + 1)))
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return False
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self._on_enter()
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return True
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def save_output_hooks(self):
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self.__old_raw_input = __builtin__.raw_input
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PrefilterFrontEnd.save_output_hooks(self)
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def capture_output(self):
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self.SetLexer(stc.STC_LEX_NULL)
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PrefilterFrontEnd.capture_output(self)
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__builtin__.raw_input = self.raw_input
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def release_output(self):
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__builtin__.raw_input = self.__old_raw_input
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PrefilterFrontEnd.release_output(self)
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self.SetLexer(stc.STC_LEX_PYTHON)
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def after_execute(self):
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PrefilterFrontEnd.after_execute(self)
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# Clear the wait cursor
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if hasattr(self, '_cursor'):
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del self._cursor
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self.SetCursor(wx.StockCursor(wx.CURSOR_CHAR))
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def show_traceback(self):
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start_line = self.GetCurrentLine()
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PrefilterFrontEnd.show_traceback(self)
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self.ProcessEvent(wx.PaintEvent())
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#wx.Yield()
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for i in range(start_line, self.GetCurrentLine()):
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self._markers[i] = self.MarkerAdd(i, _ERROR_MARKER)
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#--------------------------------------------------------------------------
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# FrontEndBase interface
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#--------------------------------------------------------------------------
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def render_error(self, e):
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start_line = self.GetCurrentLine()
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self.write('\n' + e + '\n')
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for i in range(start_line, self.GetCurrentLine()):
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self._markers[i] = self.MarkerAdd(i, _ERROR_MARKER)
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#--------------------------------------------------------------------------
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# ConsoleWidget interface
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#--------------------------------------------------------------------------
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def new_prompt(self, prompt):
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""" Display a new prompt, and start a new input buffer.
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"""
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self._input_state = 'readline'
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ConsoleWidget.new_prompt(self, prompt)
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i = self.current_prompt_line
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self._markers[i] = self.MarkerAdd(i, _INPUT_MARKER)
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def continuation_prompt(self, *args, **kwargs):
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# Avoid multiple inheritence, be explicit about which
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# parent method class gets called
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return ConsoleWidget.continuation_prompt(self, *args, **kwargs)
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def write(self, *args, **kwargs):
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# Avoid multiple inheritence, be explicit about which
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# parent method class gets called
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return ConsoleWidget.write(self, *args, **kwargs)
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def _on_key_down(self, event, skip=True):
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""" Capture the character events, let the parent
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widget handle them, and put our logic afterward.
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"""
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# FIXME: This method needs to be broken down in smaller ones.
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current_line_num = self.GetCurrentLine()
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if event.KeyCode in (ord('c'), ord('C')) and event.ControlDown():
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# Capture Control-C
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if self._input_state == 'subprocess':
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if self.debug:
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print >>sys.__stderr__, 'Killing running process'
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if hasattr(self._running_process, 'process'):
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self._running_process.process.kill()
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elif self._input_state == 'buffering':
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if self.debug:
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print >>sys.__stderr__, 'Raising KeyboardInterrupt'
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raise KeyboardInterrupt
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# XXX: We need to make really sure we
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# get back to a prompt.
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elif self._input_state == 'subprocess' and (
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( event.KeyCode<256 and
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not event.ControlDown() )
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or
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( event.KeyCode in (ord('d'), ord('D')) and
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event.ControlDown())):
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# We are running a process, we redirect keys.
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ConsoleWidget._on_key_down(self, event, skip=skip)
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char = chr(event.KeyCode)
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# Deal with some inconsistency in wx keycodes:
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if char == '\r':
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char = '\n'
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elif not event.ShiftDown():
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char = char.lower()
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if event.ControlDown() and event.KeyCode in (ord('d'), ord('D')):
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char = '\04'
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self._running_process.process.stdin.write(char)
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self._running_process.process.stdin.flush()
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elif event.KeyCode in (ord('('), 57, 53):
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# Calltips
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event.Skip()
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self.do_calltip()
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|
elif self.AutoCompActive() and not event.KeyCode == ord('\t'):
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event.Skip()
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|
if event.KeyCode in (wx.WXK_BACK, wx.WXK_DELETE):
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|
|
wx.CallAfter(self._popup_completion, create=True)
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|
|
elif not event.KeyCode in (wx.WXK_UP, wx.WXK_DOWN, wx.WXK_LEFT,
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|
|
wx.WXK_RIGHT, wx.WXK_ESCAPE):
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|
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wx.CallAfter(self._popup_completion)
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|
else:
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|
# Up history
|
|
|
if event.KeyCode == wx.WXK_UP and (
|
|
|
( current_line_num == self.current_prompt_line and
|
|
|
event.Modifiers in (wx.MOD_NONE, wx.MOD_WIN) )
|
|
|
or event.ControlDown() ):
|
|
|
new_buffer = self.get_history_previous(
|
|
|
self.input_buffer)
|
|
|
if new_buffer is not None:
|
|
|
self.input_buffer = new_buffer
|
|
|
if self.GetCurrentLine() > self.current_prompt_line:
|
|
|
# Go to first line, for seemless history up.
|
|
|
self.GotoPos(self.current_prompt_pos)
|
|
|
# Down history
|
|
|
elif event.KeyCode == wx.WXK_DOWN and (
|
|
|
( current_line_num == self.LineCount -1 and
|
|
|
event.Modifiers in (wx.MOD_NONE, wx.MOD_WIN) )
|
|
|
or event.ControlDown() ):
|
|
|
new_buffer = self.get_history_next()
|
|
|
if new_buffer is not None:
|
|
|
self.input_buffer = new_buffer
|
|
|
# Tab-completion
|
|
|
elif event.KeyCode == ord('\t'):
|
|
|
current_line, current_line_num = self.CurLine
|
|
|
if not re.match(r'^\s*$', current_line):
|
|
|
self.complete_current_input()
|
|
|
if self.AutoCompActive():
|
|
|
wx.CallAfter(self._popup_completion, create=True)
|
|
|
else:
|
|
|
event.Skip()
|
|
|
elif event.KeyCode == wx.WXK_BACK:
|
|
|
# If characters where erased, check if we have to
|
|
|
# remove a line.
|
|
|
# XXX: What about DEL?
|
|
|
# FIXME: This logics should be in ConsoleWidget, as it is
|
|
|
# independant of IPython
|
|
|
current_line, _ = self.CurLine
|
|
|
current_pos = self.GetCurrentPos()
|
|
|
current_line_num = self.LineFromPosition(current_pos)
|
|
|
current_col = self.GetColumn(current_pos)
|
|
|
len_prompt = len(self.continuation_prompt())
|
|
|
if ( current_line.startswith(self.continuation_prompt())
|
|
|
and current_col == len_prompt):
|
|
|
new_lines = []
|
|
|
for line_num, line in enumerate(
|
|
|
self.input_buffer.split('\n')):
|
|
|
if (line_num + self.current_prompt_line ==
|
|
|
current_line_num):
|
|
|
new_lines.append(line[len_prompt:])
|
|
|
else:
|
|
|
new_lines.append('\n'+line)
|
|
|
# The first character is '\n', due to the above
|
|
|
# code:
|
|
|
self.input_buffer = ''.join(new_lines)[1:]
|
|
|
self.GotoPos(current_pos - 1 - len_prompt)
|
|
|
else:
|
|
|
ConsoleWidget._on_key_down(self, event, skip=skip)
|
|
|
else:
|
|
|
ConsoleWidget._on_key_down(self, event, skip=skip)
|
|
|
|
|
|
|
|
|
|
|
|
def _on_key_up(self, event, skip=True):
|
|
|
""" Called when any key is released.
|
|
|
"""
|
|
|
if event.KeyCode in (59, ord('.')):
|
|
|
# Intercepting '.'
|
|
|
event.Skip()
|
|
|
wx.CallAfter(self._popup_completion, create=True)
|
|
|
else:
|
|
|
ConsoleWidget._on_key_up(self, event, skip=skip)
|
|
|
# Make sure the continuation_prompts are always followed by a
|
|
|
# whitespace
|
|
|
new_lines = []
|
|
|
if self._input_state == 'readline':
|
|
|
position = self.GetCurrentPos()
|
|
|
continuation_prompt = self.continuation_prompt()[:-1]
|
|
|
for line in self.input_buffer.split('\n'):
|
|
|
if not line == continuation_prompt:
|
|
|
new_lines.append(line)
|
|
|
self.input_buffer = '\n'.join(new_lines)
|
|
|
self.GotoPos(position)
|
|
|
|
|
|
|
|
|
def _on_enter(self):
|
|
|
""" Called on return key down, in readline input_state.
|
|
|
"""
|
|
|
last_line_num = self.LineFromPosition(self.GetLength())
|
|
|
current_line_num = self.LineFromPosition(self.GetCurrentPos())
|
|
|
new_line_pos = (last_line_num - current_line_num)
|
|
|
if self.debug:
|
|
|
print >>sys.__stdout__, repr(self.input_buffer)
|
|
|
self.write('\n', refresh=False)
|
|
|
# Under windows scintilla seems to be doing funny
|
|
|
# stuff to the line returns here, but the getter for
|
|
|
# input_buffer filters this out.
|
|
|
if sys.platform == 'win32':
|
|
|
self.input_buffer = self.input_buffer
|
|
|
old_prompt_num = self.current_prompt_pos
|
|
|
has_executed = PrefilterFrontEnd._on_enter(self,
|
|
|
new_line_pos=new_line_pos)
|
|
|
if old_prompt_num == self.current_prompt_pos:
|
|
|
# No execution has happened
|
|
|
self.GotoPos(self.GetLineEndPosition(current_line_num + 1))
|
|
|
return has_executed
|
|
|
|
|
|
|
|
|
#--------------------------------------------------------------------------
|
|
|
# EditWindow API
|
|
|
#--------------------------------------------------------------------------
|
|
|
|
|
|
def OnUpdateUI(self, event):
|
|
|
""" Override the OnUpdateUI of the EditWindow class, to prevent
|
|
|
syntax highlighting both for faster redraw, and for more
|
|
|
consistent look and feel.
|
|
|
"""
|
|
|
if not self._input_state == 'readline':
|
|
|
ConsoleWidget.OnUpdateUI(self, event)
|
|
|
|
|
|
#--------------------------------------------------------------------------
|
|
|
# Private API
|
|
|
#--------------------------------------------------------------------------
|
|
|
|
|
|
def _buffer_flush(self, event):
|
|
|
""" Called by the timer to flush the write buffer.
|
|
|
|
|
|
This is always called in the mainloop, by the wx timer.
|
|
|
"""
|
|
|
self._out_buffer_lock.acquire()
|
|
|
_out_buffer = self._out_buffer
|
|
|
self._out_buffer = []
|
|
|
self._out_buffer_lock.release()
|
|
|
self.write(''.join(_out_buffer), refresh=False)
|
|
|
|
|
|
|
|
|
def _colorize_input_buffer(self):
|
|
|
""" Keep the input buffer lines at a bright color.
|
|
|
"""
|
|
|
if not self._input_state in ('readline', 'raw_input'):
|
|
|
return
|
|
|
end_line = self.GetCurrentLine()
|
|
|
if not sys.platform == 'win32':
|
|
|
end_line += 1
|
|
|
for i in range(self.current_prompt_line, end_line):
|
|
|
if i in self._markers:
|
|
|
self.MarkerDeleteHandle(self._markers[i])
|
|
|
self._markers[i] = self.MarkerAdd(i, _INPUT_MARKER)
|
|
|
|
|
|
|
|
|
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 = WxController(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((680, 460))
|
|
|
self = frame.shell
|
|
|
|
|
|
app.MainLoop()
|
|
|
|
|
|
|
