|
|
# Standard library imports
|
|
|
from subprocess import Popen
|
|
|
|
|
|
# System library imports
|
|
|
from PyQt4 import QtCore, QtGui
|
|
|
|
|
|
# Local imports
|
|
|
from IPython.core.inputsplitter import IPythonInputSplitter
|
|
|
from IPython.core.usage import default_banner
|
|
|
from frontend_widget import FrontendWidget
|
|
|
|
|
|
|
|
|
class IPythonPromptBlock(object):
|
|
|
""" An internal storage object for IPythonWidget.
|
|
|
"""
|
|
|
def __init__(self, block, length, number):
|
|
|
self.block = block
|
|
|
self.length = length
|
|
|
self.number = number
|
|
|
|
|
|
|
|
|
class IPythonWidget(FrontendWidget):
|
|
|
""" A FrontendWidget for an IPython kernel.
|
|
|
"""
|
|
|
|
|
|
# Signal emitted when an editor is needed for a file and the editor has been
|
|
|
# specified as 'custom'. See 'set_editor' for more information.
|
|
|
custom_edit_requested = QtCore.pyqtSignal(object, object)
|
|
|
|
|
|
# The default stylesheet: black text on a white background.
|
|
|
default_stylesheet = """
|
|
|
.error { color: red; }
|
|
|
.in-prompt { color: navy; }
|
|
|
.in-prompt-number { font-weight: bold; }
|
|
|
.out-prompt { color: darkred; }
|
|
|
.out-prompt-number { font-weight: bold; }
|
|
|
"""
|
|
|
|
|
|
# A dark stylesheet: white text on a black background.
|
|
|
dark_stylesheet = """
|
|
|
QPlainTextEdit, QTextEdit { background-color: black; color: white }
|
|
|
QFrame { border: 1px solid grey; }
|
|
|
.error { color: red; }
|
|
|
.in-prompt { color: lime; }
|
|
|
.in-prompt-number { color: lime; font-weight: bold; }
|
|
|
.out-prompt { color: red; }
|
|
|
.out-prompt-number { color: red; font-weight: bold; }
|
|
|
"""
|
|
|
|
|
|
# Default prompts.
|
|
|
in_prompt = 'In [<span class="in-prompt-number">%i</span>]: '
|
|
|
out_prompt = 'Out[<span class="out-prompt-number">%i</span>]: '
|
|
|
|
|
|
# FrontendWidget protected class variables.
|
|
|
#_input_splitter_class = IPythonInputSplitter
|
|
|
|
|
|
# IPythonWidget protected class variables.
|
|
|
_payload_source_edit = 'IPython.zmq.zmqshell.ZMQInteractiveShell.edit_magic'
|
|
|
_payload_source_page = 'IPython.zmq.page.page'
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'object' interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def __init__(self, *args, **kw):
|
|
|
super(IPythonWidget, self).__init__(*args, **kw)
|
|
|
|
|
|
# IPythonWidget protected variables.
|
|
|
self._previous_prompt_obj = None
|
|
|
|
|
|
# Set a default editor and stylesheet.
|
|
|
self.set_editor('default')
|
|
|
self.reset_styling()
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'BaseFrontendMixin' abstract interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def _handle_pyout(self, msg):
|
|
|
""" Reimplemented for IPython-style "display hook".
|
|
|
"""
|
|
|
if not self._hidden and self._is_from_this_session(msg):
|
|
|
content = msg['content']
|
|
|
prompt_number = content['prompt_number']
|
|
|
self._append_plain_text(content['output_sep'])
|
|
|
self._append_html(self._make_out_prompt(prompt_number))
|
|
|
self._append_plain_text(content['data'] + '\n' +
|
|
|
content['output_sep2'])
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'FrontendWidget' interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def execute_file(self, path, hidden=False):
|
|
|
""" Reimplemented to use the 'run' magic.
|
|
|
"""
|
|
|
self.execute('run %s' % path, hidden=hidden)
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'FrontendWidget' protected interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def _get_banner(self):
|
|
|
""" Reimplemented to return IPython's default banner.
|
|
|
"""
|
|
|
return default_banner + '\n'
|
|
|
|
|
|
def _process_execute_error(self, msg):
|
|
|
""" Reimplemented for IPython-style traceback formatting.
|
|
|
"""
|
|
|
content = msg['content']
|
|
|
traceback_lines = content['traceback'][:]
|
|
|
traceback = ''.join(traceback_lines)
|
|
|
traceback = traceback.replace(' ', ' ')
|
|
|
traceback = traceback.replace('\n', '<br/>')
|
|
|
|
|
|
ename = content['ename']
|
|
|
ename_styled = '<span class="error">%s</span>' % ename
|
|
|
traceback = traceback.replace(ename, ename_styled)
|
|
|
|
|
|
self._append_html(traceback)
|
|
|
|
|
|
def _process_execute_payload(self, item):
|
|
|
""" Reimplemented to handle %edit and paging payloads.
|
|
|
"""
|
|
|
if item['source'] == self._payload_source_edit:
|
|
|
self.edit(item['filename'], item['line_number'])
|
|
|
return True
|
|
|
elif item['source'] == self._payload_source_page:
|
|
|
self._page(item['data'])
|
|
|
return True
|
|
|
else:
|
|
|
return False
|
|
|
|
|
|
def _show_interpreter_prompt(self, number=None, input_sep='\n'):
|
|
|
""" Reimplemented for IPython-style prompts.
|
|
|
"""
|
|
|
# TODO: If a number was not specified, make a prompt number request.
|
|
|
if number is None:
|
|
|
number = 0
|
|
|
|
|
|
# Show a new prompt and save information about it so that it can be
|
|
|
# updated later if the prompt number turns out to be wrong.
|
|
|
self._append_plain_text(input_sep)
|
|
|
self._show_prompt(self._make_in_prompt(number), html=True)
|
|
|
block = self._control.document().lastBlock()
|
|
|
length = len(self._prompt)
|
|
|
self._previous_prompt_obj = IPythonPromptBlock(block, length, number)
|
|
|
|
|
|
# Update continuation prompt to reflect (possibly) new prompt length.
|
|
|
self._set_continuation_prompt(
|
|
|
self._make_continuation_prompt(self._prompt), html=True)
|
|
|
|
|
|
def _show_interpreter_prompt_for_reply(self, msg):
|
|
|
""" Reimplemented for IPython-style prompts.
|
|
|
"""
|
|
|
# Update the old prompt number if necessary.
|
|
|
content = msg['content']
|
|
|
previous_prompt_number = content['prompt_number']
|
|
|
if self._previous_prompt_obj and \
|
|
|
self._previous_prompt_obj.number != previous_prompt_number:
|
|
|
block = self._previous_prompt_obj.block
|
|
|
if block.isValid():
|
|
|
|
|
|
# Remove the old prompt and insert a new prompt.
|
|
|
cursor = QtGui.QTextCursor(block)
|
|
|
cursor.movePosition(QtGui.QTextCursor.Right,
|
|
|
QtGui.QTextCursor.KeepAnchor,
|
|
|
self._previous_prompt_obj.length)
|
|
|
prompt = self._make_in_prompt(previous_prompt_number)
|
|
|
self._prompt = self._insert_html_fetching_plain_text(
|
|
|
cursor, prompt)
|
|
|
|
|
|
# When the HTML is inserted, Qt blows away the syntax
|
|
|
# highlighting for the line, so we need to rehighlight it.
|
|
|
self._highlighter.rehighlightBlock(cursor.block())
|
|
|
|
|
|
self._previous_prompt_obj = None
|
|
|
|
|
|
# Show a new prompt with the kernel's estimated prompt number.
|
|
|
next_prompt = content['next_prompt']
|
|
|
self._show_interpreter_prompt(next_prompt['prompt_number'],
|
|
|
next_prompt['input_sep'])
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'IPythonWidget' interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def edit(self, filename, line=None):
|
|
|
""" Opens a Python script for editing.
|
|
|
|
|
|
Parameters:
|
|
|
-----------
|
|
|
filename : str
|
|
|
A path to a local system file.
|
|
|
|
|
|
line : int, optional
|
|
|
A line of interest in the file.
|
|
|
|
|
|
Raises:
|
|
|
-------
|
|
|
OSError
|
|
|
If the editor command cannot be executed.
|
|
|
"""
|
|
|
if self._editor == 'default':
|
|
|
url = QtCore.QUrl.fromLocalFile(filename)
|
|
|
if not QtGui.QDesktopServices.openUrl(url):
|
|
|
message = 'Failed to open %s with the default application'
|
|
|
raise OSError(message % repr(filename))
|
|
|
elif self._editor is None:
|
|
|
self.custom_edit_requested.emit(filename, line)
|
|
|
else:
|
|
|
Popen(self._editor + [filename])
|
|
|
|
|
|
def reset_styling(self):
|
|
|
""" Restores the default IPythonWidget styling.
|
|
|
"""
|
|
|
self.set_styling(self.default_stylesheet, syntax_style='default')
|
|
|
#self.set_styling(self.dark_stylesheet, syntax_style='monokai')
|
|
|
|
|
|
def set_editor(self, editor):
|
|
|
""" Sets the editor to use with the %edit magic.
|
|
|
|
|
|
Parameters:
|
|
|
-----------
|
|
|
editor : str or sequence of str
|
|
|
A command suitable for use with Popen. This command will be executed
|
|
|
with a single argument--a filename--when editing is requested.
|
|
|
|
|
|
This parameter also takes two special values:
|
|
|
'default' : Files will be edited with the system default
|
|
|
application for Python files.
|
|
|
'custom' : Emit a 'custom_edit_requested(str, int)' signal
|
|
|
instead of opening an editor.
|
|
|
"""
|
|
|
if editor == 'default':
|
|
|
self._editor = 'default'
|
|
|
elif editor == 'custom':
|
|
|
self._editor = None
|
|
|
elif isinstance(editor, basestring):
|
|
|
self._editor = [ editor ]
|
|
|
else:
|
|
|
self._editor = list(editor)
|
|
|
|
|
|
def set_styling(self, stylesheet, syntax_style=None):
|
|
|
""" Sets the IPythonWidget styling.
|
|
|
|
|
|
Parameters:
|
|
|
-----------
|
|
|
stylesheet : str
|
|
|
A CSS stylesheet. The stylesheet can contain classes for:
|
|
|
1. Qt: QPlainTextEdit, QFrame, QWidget, etc
|
|
|
2. Pygments: .c, .k, .o, etc (see PygmentsHighlighter)
|
|
|
3. IPython: .error, .in-prompt, .out-prompt, etc.
|
|
|
|
|
|
syntax_style : str or None [default None]
|
|
|
If specified, use the Pygments style with given name. Otherwise,
|
|
|
the stylesheet is queried for Pygments style information.
|
|
|
"""
|
|
|
self.setStyleSheet(stylesheet)
|
|
|
self._control.document().setDefaultStyleSheet(stylesheet)
|
|
|
if self._page_control:
|
|
|
self._page_control.document().setDefaultStyleSheet(stylesheet)
|
|
|
|
|
|
if syntax_style is None:
|
|
|
self._highlighter.set_style_sheet(stylesheet)
|
|
|
else:
|
|
|
self._highlighter.set_style(syntax_style)
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'IPythonWidget' protected interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def _make_in_prompt(self, number):
|
|
|
""" Given a prompt number, returns an HTML In prompt.
|
|
|
"""
|
|
|
body = self.in_prompt % number
|
|
|
return '<span class="in-prompt">%s</span>' % body
|
|
|
|
|
|
def _make_continuation_prompt(self, prompt):
|
|
|
""" Given a plain text version of an In prompt, returns an HTML
|
|
|
continuation prompt.
|
|
|
"""
|
|
|
end_chars = '...: '
|
|
|
space_count = len(prompt.lstrip('\n')) - len(end_chars)
|
|
|
body = ' ' * space_count + end_chars
|
|
|
return '<span class="in-prompt">%s</span>' % body
|
|
|
|
|
|
def _make_out_prompt(self, number):
|
|
|
""" Given a prompt number, returns an HTML Out prompt.
|
|
|
"""
|
|
|
body = self.out_prompt % number
|
|
|
return '<span class="out-prompt">%s</span>' % body
|
|
|
|
