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# -*- coding:utf-8 -*-
#
# Copyright © 2011-2012 Pierre Raybaut
# Licensed under the terms of the MIT License
# (see spyderlib/__init__.py for details)
"""
IPython v0.13+ client's widget
"""
# IPython imports
try: # 1.0
from IPython.qt.console.rich_ipython_widget import RichIPythonWidget
except ImportError: # 0.13
from IPython.frontend.qt.console.rich_ipython_widget import RichIPythonWidget
# Qt imports
from spyderlib.qt.QtGui import QTextEdit, QKeySequence, QShortcut
from spyderlib.qt.QtCore import SIGNAL, Qt
from spyderlib.utils.qthelpers import restore_keyevent
# Local imports
from spyderlib.config import CONF
from spyderlib.utils import programs
from spyderlib.widgets.mixins import (BaseEditMixin, InspectObjectMixin,
TracebackLinksMixin)
class IPythonControlWidget(TracebackLinksMixin, InspectObjectMixin, QTextEdit,
BaseEditMixin):
"""
Subclass of QTextEdit with features from Spyder's mixins to use as the
control widget for IPython widgets
"""
QT_CLASS = QTextEdit
def __init__(self, parent=None):
QTextEdit.__init__(self, parent)
BaseEditMixin.__init__(self)
TracebackLinksMixin.__init__(self)
InspectObjectMixin.__init__(self)
self.calltips = False # To not use Spyder calltips
self.found_results = []
def showEvent(self, event):
"""Reimplement Qt Method"""
self.emit(SIGNAL("visibility_changed(bool)"), True)
def _key_question(self, text):
""" Action for '?' and '(' """
parent = self.parentWidget()
self.current_prompt_pos = parent._prompt_pos
if self.get_current_line_to_cursor():
last_obj = self.get_last_obj()
if last_obj and not last_obj.isdigit():
self.show_docstring(last_obj)
self.insert_text(text)
def keyPressEvent(self, event):
"""Reimplement Qt Method - Basic keypress event handler"""
event, text, key, ctrl, shift = restore_keyevent(event)
if key == Qt.Key_Question and not self.has_selected_text() and \
self.set_inspector_enabled:
self._key_question(text)
elif key == Qt.Key_ParenLeft and not self.has_selected_text() \
and self.set_inspector_enabled:
self._key_question(text)
else:
# Let the parent widget handle the key press event
QTextEdit.keyPressEvent(self, event)
def focusInEvent(self, event):
"""Reimplement Qt method to send focus change notification"""
self.emit(SIGNAL('focus_changed()'))
return super(IPythonControlWidget, self).focusInEvent(event)
def focusOutEvent(self, event):
"""Reimplement Qt method to send focus change notification"""
self.emit(SIGNAL('focus_changed()'))
return super(IPythonControlWidget, self).focusOutEvent(event)
class IPythonPageControlWidget(QTextEdit, BaseEditMixin):
"""
Subclass of QTextEdit with features from Spyder's mixins.BaseEditMixin to
use as the paging widget for IPython widgets
"""
QT_CLASS = QTextEdit
def __init__(self, parent=None):
QTextEdit.__init__(self, parent)
BaseEditMixin.__init__(self)
self.found_results = []
def showEvent(self, event):
"""Reimplement Qt Method"""
self.emit(SIGNAL("visibility_changed(bool)"), True)
def keyPressEvent(self, event):
"""Reimplement Qt Method - Basic keypress event handler"""
event, text, key, ctrl, shift = restore_keyevent(event)
if key == Qt.Key_Slash and self.isVisible():
self.emit(SIGNAL("show_find_widget()"))
def focusInEvent(self, event):
"""Reimplement Qt method to send focus change notification"""
self.emit(SIGNAL('focus_changed()'))
return super(IPythonPageControlWidget, self).focusInEvent(event)
def focusOutEvent(self, event):
"""Reimplement Qt method to send focus change notification"""
self.emit(SIGNAL('focus_changed()'))
return super(IPythonPageControlWidget, self).focusOutEvent(event)
class SpyderIPythonWidget(RichIPythonWidget):
"""
Spyder's IPython widget
This class has custom control and page_control widgets, additional methods
to provide missing functionality and a couple more keyboard shortcuts.
"""
def __init__(self, *args, **kw):
# To override the Qt widget used by RichIPythonWidget
self.custom_control = IPythonControlWidget
self.custom_page_control = IPythonPageControlWidget
super(SpyderIPythonWidget, self).__init__(*args, **kw)
# --- Spyder variables ---
self.ipyclient = None
# --- Keyboard shortcuts ---
inspectsc = QShortcut(QKeySequence("Ctrl+I"), self,
self._control.inspect_current_object)
inspectsc.setContext(Qt.WidgetWithChildrenShortcut)
clear_consolesc = QShortcut(QKeySequence("Ctrl+L"), self,
self.clear_console)
clear_consolesc.setContext(Qt.WidgetWithChildrenShortcut)
# --- IPython variables ---
# To send an interrupt signal to the Spyder kernel
self.custom_interrupt = True
# To restart the Spyder kernel in case it dies
self.custom_restart = True
#---- Public API ----------------------------------------------------------
def set_ipyclient(self, ipyclient):
"""Bind this IPython widget to an IPython client widget
(see spyderlib/plugins/ipythonconsole.py)"""
self.ipyclient = ipyclient
self.exit_requested.connect(ipyclient.exit_callback)
def show_banner(self):
"""Banner for IPython widgets with pylab message"""
from IPython.core.usage import default_gui_banner
banner = default_gui_banner
pylab_o = CONF.get('ipython_console', 'pylab', True)
autoload_pylab_o = CONF.get('ipython_console', 'pylab/autoload', True)
mpl_installed = programs.is_module_installed('matplotlib')
if mpl_installed and (pylab_o and autoload_pylab_o):
backend_o = CONF.get('ipython_console', 'pylab/backend', 0)
backends = {0: 'module://IPython.zmq.pylab.backend_inline',
1: 'Qt4Agg', 2: 'Qt4Agg', 3: 'MacOSX', 4: 'GTKAgg',
5: 'WXAgg', 6: 'TKAgg'}
pylab_message = """
Welcome to pylab, a matplotlib-based Python environment [backend: %s].
For more information, type 'help(pylab)'.\n""" % backends[backend_o]
banner = banner + pylab_message
sympy_o = CONF.get('ipython_console', 'symbolic_math', True)
if sympy_o:
lines = """
These commands were executed:
>>> from __future__ import division
>>> from sympy import *
>>> x, y, z, t = symbols('x y z t')
>>> k, m, n = symbols('k m n', integer=True)
>>> f, g, h = symbols('f g h', cls=Function)
"""
banner = banner + lines
return banner
def clear_console(self):
self.execute("%clear")
def write_to_stdin(self, line):
"""
Send raw characters to the IPython kernel through stdin
but only if the kernel is currently looking for raw input.
"""
if self._reading:
if programs.is_module_installed('IPython', '>=1.0'):
self.kernel_client.stdin_channel.input(line)
else:
self.kernel_manager.stdin_channel.input(line)
#---- IPython private methods ---------------------------------------------
def _context_menu_make(self, pos):
"""Reimplement the IPython context menu"""
menu = super(SpyderIPythonWidget, self)._context_menu_make(pos)
return self.ipyclient.add_actions_to_context_menu(menu)
def _banner_default(self):
"""
Reimplement banner creation to let the user decide if he wants a
banner or not
"""
banner_o = CONF.get('ipython_console', 'show_banner', True)
if banner_o:
return self.show_banner()
else:
return ''
#---- Qt methods ----------------------------------------------------------
def focusInEvent(self, event):
"""Reimplement Qt method to send focus change notification"""
self.emit(SIGNAL('focus_changed()'))
return super(SpyderIPythonWidget, self).focusInEvent(event)
def focusOutEvent(self, event):
"""Reimplement Qt method to send focus change notification"""
self.emit(SIGNAL('focus_changed()'))
return super(SpyderIPythonWidget, self).focusOutEvent(event)
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