|
|
from __future__ import print_function
|
|
|
|
|
|
# Standard library imports
|
|
|
from collections import namedtuple
|
|
|
import sys
|
|
|
|
|
|
# System library imports
|
|
|
from pygments.lexers import PythonLexer
|
|
|
from PyQt4 import QtCore, QtGui
|
|
|
|
|
|
# Local imports
|
|
|
from IPython.core.inputsplitter import InputSplitter, transform_classic_prompt
|
|
|
from IPython.frontend.qt.base_frontend_mixin import BaseFrontendMixin
|
|
|
from IPython.utils.traitlets import Bool
|
|
|
from bracket_matcher import BracketMatcher
|
|
|
from call_tip_widget import CallTipWidget
|
|
|
from completion_lexer import CompletionLexer
|
|
|
from history_console_widget import HistoryConsoleWidget
|
|
|
from pygments_highlighter import PygmentsHighlighter
|
|
|
|
|
|
|
|
|
class FrontendHighlighter(PygmentsHighlighter):
|
|
|
""" A PygmentsHighlighter that can be turned on and off and that ignores
|
|
|
prompts.
|
|
|
"""
|
|
|
|
|
|
def __init__(self, frontend):
|
|
|
super(FrontendHighlighter, self).__init__(frontend._control.document())
|
|
|
self._current_offset = 0
|
|
|
self._frontend = frontend
|
|
|
self.highlighting_on = False
|
|
|
|
|
|
def highlightBlock(self, qstring):
|
|
|
""" Highlight a block of text. Reimplemented to highlight selectively.
|
|
|
"""
|
|
|
if not self.highlighting_on:
|
|
|
return
|
|
|
|
|
|
# The input to this function is unicode string that may contain
|
|
|
# paragraph break characters, non-breaking spaces, etc. Here we acquire
|
|
|
# the string as plain text so we can compare it.
|
|
|
current_block = self.currentBlock()
|
|
|
string = self._frontend._get_block_plain_text(current_block)
|
|
|
|
|
|
# Decide whether to check for the regular or continuation prompt.
|
|
|
if current_block.contains(self._frontend._prompt_pos):
|
|
|
prompt = self._frontend._prompt
|
|
|
else:
|
|
|
prompt = self._frontend._continuation_prompt
|
|
|
|
|
|
# Don't highlight the part of the string that contains the prompt.
|
|
|
if string.startswith(prompt):
|
|
|
self._current_offset = len(prompt)
|
|
|
qstring.remove(0, len(prompt))
|
|
|
else:
|
|
|
self._current_offset = 0
|
|
|
|
|
|
PygmentsHighlighter.highlightBlock(self, qstring)
|
|
|
|
|
|
def rehighlightBlock(self, block):
|
|
|
""" Reimplemented to temporarily enable highlighting if disabled.
|
|
|
"""
|
|
|
old = self.highlighting_on
|
|
|
self.highlighting_on = True
|
|
|
super(FrontendHighlighter, self).rehighlightBlock(block)
|
|
|
self.highlighting_on = old
|
|
|
|
|
|
def setFormat(self, start, count, format):
|
|
|
""" Reimplemented to highlight selectively.
|
|
|
"""
|
|
|
start += self._current_offset
|
|
|
PygmentsHighlighter.setFormat(self, start, count, format)
|
|
|
|
|
|
|
|
|
class FrontendWidget(HistoryConsoleWidget, BaseFrontendMixin):
|
|
|
""" A Qt frontend for a generic Python kernel.
|
|
|
"""
|
|
|
|
|
|
# An option and corresponding signal for overriding the default kernel
|
|
|
# interrupt behavior.
|
|
|
custom_interrupt = Bool(False)
|
|
|
custom_interrupt_requested = QtCore.pyqtSignal()
|
|
|
|
|
|
# An option and corresponding signals for overriding the default kernel
|
|
|
# restart behavior.
|
|
|
custom_restart = Bool(False)
|
|
|
custom_restart_kernel_died = QtCore.pyqtSignal(float)
|
|
|
custom_restart_requested = QtCore.pyqtSignal()
|
|
|
|
|
|
# Emitted when an 'execute_reply' has been received from the kernel and
|
|
|
# processed by the FrontendWidget.
|
|
|
executed = QtCore.pyqtSignal(object)
|
|
|
|
|
|
# Emitted when an exit request has been received from the kernel.
|
|
|
exit_requested = QtCore.pyqtSignal()
|
|
|
|
|
|
# Protected class variables.
|
|
|
_CallTipRequest = namedtuple('_CallTipRequest', ['id', 'pos'])
|
|
|
_CompletionRequest = namedtuple('_CompletionRequest', ['id', 'pos'])
|
|
|
_ExecutionRequest = namedtuple('_ExecutionRequest', ['id', 'kind'])
|
|
|
_input_splitter_class = InputSplitter
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'object' interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def __init__(self, *args, **kw):
|
|
|
super(FrontendWidget, self).__init__(*args, **kw)
|
|
|
|
|
|
# FrontendWidget protected variables.
|
|
|
self._bracket_matcher = BracketMatcher(self._control)
|
|
|
self._call_tip_widget = CallTipWidget(self._control)
|
|
|
self._completion_lexer = CompletionLexer(PythonLexer())
|
|
|
self._copy_raw_action = QtGui.QAction('Copy (Raw Text)', None)
|
|
|
self._hidden = False
|
|
|
self._highlighter = FrontendHighlighter(self)
|
|
|
self._input_splitter = self._input_splitter_class(input_mode='cell')
|
|
|
self._kernel_manager = None
|
|
|
self._request_info = {}
|
|
|
|
|
|
# Configure the ConsoleWidget.
|
|
|
self.tab_width = 4
|
|
|
self._set_continuation_prompt('... ')
|
|
|
|
|
|
# Configure the CallTipWidget.
|
|
|
self._call_tip_widget.setFont(self.font)
|
|
|
self.font_changed.connect(self._call_tip_widget.setFont)
|
|
|
|
|
|
# Configure actions.
|
|
|
action = self._copy_raw_action
|
|
|
key = QtCore.Qt.CTRL | QtCore.Qt.SHIFT | QtCore.Qt.Key_C
|
|
|
action.setEnabled(False)
|
|
|
action.setShortcut(QtGui.QKeySequence(key))
|
|
|
action.setShortcutContext(QtCore.Qt.WidgetWithChildrenShortcut)
|
|
|
action.triggered.connect(self.copy_raw)
|
|
|
self.copy_available.connect(action.setEnabled)
|
|
|
self.addAction(action)
|
|
|
|
|
|
# Connect signal handlers.
|
|
|
document = self._control.document()
|
|
|
document.contentsChange.connect(self._document_contents_change)
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'ConsoleWidget' public interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def copy(self):
|
|
|
""" Copy the currently selected text to the clipboard, removing prompts.
|
|
|
"""
|
|
|
text = unicode(self._control.textCursor().selection().toPlainText())
|
|
|
if text:
|
|
|
lines = map(transform_classic_prompt, text.splitlines())
|
|
|
text = '\n'.join(lines)
|
|
|
QtGui.QApplication.clipboard().setText(text)
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'ConsoleWidget' abstract interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def _is_complete(self, source, interactive):
|
|
|
""" Returns whether 'source' can be completely processed and a new
|
|
|
prompt created. When triggered by an Enter/Return key press,
|
|
|
'interactive' is True; otherwise, it is False.
|
|
|
"""
|
|
|
complete = self._input_splitter.push(source)
|
|
|
if interactive:
|
|
|
complete = not self._input_splitter.push_accepts_more()
|
|
|
return complete
|
|
|
|
|
|
def _execute(self, source, hidden):
|
|
|
""" Execute 'source'. If 'hidden', do not show any output.
|
|
|
|
|
|
See parent class :meth:`execute` docstring for full details.
|
|
|
"""
|
|
|
msg_id = self.kernel_manager.xreq_channel.execute(source, hidden)
|
|
|
self._request_info['execute'] = self._ExecutionRequest(msg_id, 'user')
|
|
|
self._hidden = hidden
|
|
|
|
|
|
def _prompt_started_hook(self):
|
|
|
""" Called immediately after a new prompt is displayed.
|
|
|
"""
|
|
|
if not self._reading:
|
|
|
self._highlighter.highlighting_on = True
|
|
|
|
|
|
def _prompt_finished_hook(self):
|
|
|
""" Called immediately after a prompt is finished, i.e. when some input
|
|
|
will be processed and a new prompt displayed.
|
|
|
"""
|
|
|
if not self._reading:
|
|
|
self._highlighter.highlighting_on = False
|
|
|
|
|
|
def _tab_pressed(self):
|
|
|
""" Called when the tab key is pressed. Returns whether to continue
|
|
|
processing the event.
|
|
|
"""
|
|
|
# Perform tab completion if:
|
|
|
# 1) The cursor is in the input buffer.
|
|
|
# 2) There is a non-whitespace character before the cursor.
|
|
|
text = self._get_input_buffer_cursor_line()
|
|
|
if text is None:
|
|
|
return False
|
|
|
complete = bool(text[:self._get_input_buffer_cursor_column()].strip())
|
|
|
if complete:
|
|
|
self._complete()
|
|
|
return not complete
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'ConsoleWidget' protected interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def _context_menu_make(self, pos):
|
|
|
""" Reimplemented to add an action for raw copy.
|
|
|
"""
|
|
|
menu = super(FrontendWidget, self)._context_menu_make(pos)
|
|
|
for before_action in menu.actions():
|
|
|
if before_action.shortcut().matches(QtGui.QKeySequence.Paste) == \
|
|
|
QtGui.QKeySequence.ExactMatch:
|
|
|
menu.insertAction(before_action, self._copy_raw_action)
|
|
|
break
|
|
|
return menu
|
|
|
|
|
|
def _event_filter_console_keypress(self, event):
|
|
|
""" Reimplemented for execution interruption and smart backspace.
|
|
|
"""
|
|
|
key = event.key()
|
|
|
if self._control_key_down(event.modifiers(), include_command=False):
|
|
|
|
|
|
if key == QtCore.Qt.Key_C and self._executing:
|
|
|
self.interrupt_kernel()
|
|
|
return True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Period:
|
|
|
message = 'Are you sure you want to restart the kernel?'
|
|
|
self.restart_kernel(message, now=False)
|
|
|
return True
|
|
|
|
|
|
elif not event.modifiers() & QtCore.Qt.AltModifier:
|
|
|
|
|
|
# Smart backspace: remove four characters in one backspace if:
|
|
|
# 1) everything left of the cursor is whitespace
|
|
|
# 2) the four characters immediately left of the cursor are spaces
|
|
|
if key == QtCore.Qt.Key_Backspace:
|
|
|
col = self._get_input_buffer_cursor_column()
|
|
|
cursor = self._control.textCursor()
|
|
|
if col > 3 and not cursor.hasSelection():
|
|
|
text = self._get_input_buffer_cursor_line()[:col]
|
|
|
if text.endswith(' ') and not text.strip():
|
|
|
cursor.movePosition(QtGui.QTextCursor.Left,
|
|
|
QtGui.QTextCursor.KeepAnchor, 4)
|
|
|
cursor.removeSelectedText()
|
|
|
return True
|
|
|
|
|
|
return super(FrontendWidget, self)._event_filter_console_keypress(event)
|
|
|
|
|
|
def _insert_continuation_prompt(self, cursor):
|
|
|
""" Reimplemented for auto-indentation.
|
|
|
"""
|
|
|
super(FrontendWidget, self)._insert_continuation_prompt(cursor)
|
|
|
cursor.insertText(' ' * self._input_splitter.indent_spaces)
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'BaseFrontendMixin' abstract interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def _handle_complete_reply(self, rep):
|
|
|
""" Handle replies for tab completion.
|
|
|
"""
|
|
|
cursor = self._get_cursor()
|
|
|
info = self._request_info.get('complete')
|
|
|
if info and info.id == rep['parent_header']['msg_id'] and \
|
|
|
info.pos == cursor.position():
|
|
|
text = '.'.join(self._get_context())
|
|
|
cursor.movePosition(QtGui.QTextCursor.Left, n=len(text))
|
|
|
self._complete_with_items(cursor, rep['content']['matches'])
|
|
|
|
|
|
def _handle_execute_reply(self, msg):
|
|
|
""" Handles replies for code execution.
|
|
|
"""
|
|
|
info = self._request_info.get('execute')
|
|
|
if info and info.id == msg['parent_header']['msg_id'] and \
|
|
|
info.kind == 'user' and not self._hidden:
|
|
|
# Make sure that all output from the SUB channel has been processed
|
|
|
# before writing a new prompt.
|
|
|
self.kernel_manager.sub_channel.flush()
|
|
|
|
|
|
# Reset the ANSI style information to prevent bad text in stdout
|
|
|
# from messing up our colors. We're not a true terminal so we're
|
|
|
# allowed to do this.
|
|
|
if self.ansi_codes:
|
|
|
self._ansi_processor.reset_sgr()
|
|
|
|
|
|
content = msg['content']
|
|
|
status = content['status']
|
|
|
if status == 'ok':
|
|
|
self._process_execute_ok(msg)
|
|
|
elif status == 'error':
|
|
|
self._process_execute_error(msg)
|
|
|
elif status == 'abort':
|
|
|
self._process_execute_abort(msg)
|
|
|
|
|
|
self._show_interpreter_prompt_for_reply(msg)
|
|
|
self.executed.emit(msg)
|
|
|
|
|
|
def _handle_input_request(self, msg):
|
|
|
""" Handle requests for raw_input.
|
|
|
"""
|
|
|
if self._hidden:
|
|
|
raise RuntimeError('Request for raw input during hidden execution.')
|
|
|
|
|
|
# Make sure that all output from the SUB channel has been processed
|
|
|
# before entering readline mode.
|
|
|
self.kernel_manager.sub_channel.flush()
|
|
|
|
|
|
def callback(line):
|
|
|
self.kernel_manager.rep_channel.input(line)
|
|
|
self._readline(msg['content']['prompt'], callback=callback)
|
|
|
|
|
|
def _handle_kernel_died(self, since_last_heartbeat):
|
|
|
""" Handle the kernel's death by asking if the user wants to restart.
|
|
|
"""
|
|
|
if self.custom_restart:
|
|
|
self.custom_restart_kernel_died.emit(since_last_heartbeat)
|
|
|
else:
|
|
|
message = 'The kernel heartbeat has been inactive for %.2f ' \
|
|
|
'seconds. Do you want to restart the kernel? You may ' \
|
|
|
'first want to check the network connection.' % \
|
|
|
since_last_heartbeat
|
|
|
self.restart_kernel(message, now=True)
|
|
|
|
|
|
def _handle_object_info_reply(self, rep):
|
|
|
""" Handle replies for call tips.
|
|
|
"""
|
|
|
cursor = self._get_cursor()
|
|
|
info = self._request_info.get('call_tip')
|
|
|
if info and info.id == rep['parent_header']['msg_id'] and \
|
|
|
info.pos == cursor.position():
|
|
|
doc = rep['content']['docstring']
|
|
|
if doc:
|
|
|
self._call_tip_widget.show_docstring(doc)
|
|
|
|
|
|
def _handle_pyout(self, msg):
|
|
|
""" Handle display hook output.
|
|
|
"""
|
|
|
if not self._hidden and self._is_from_this_session(msg):
|
|
|
self._append_plain_text(msg['content']['data'] + '\n')
|
|
|
|
|
|
def _handle_stream(self, msg):
|
|
|
""" Handle stdout, stderr, and stdin.
|
|
|
"""
|
|
|
if not self._hidden and self._is_from_this_session(msg):
|
|
|
# Most consoles treat tabs as being 8 space characters. Convert tabs
|
|
|
# to spaces so that output looks as expected regardless of this
|
|
|
# widget's tab width.
|
|
|
text = msg['content']['data'].expandtabs(8)
|
|
|
|
|
|
self._append_plain_text(text)
|
|
|
self._control.moveCursor(QtGui.QTextCursor.End)
|
|
|
|
|
|
def _started_channels(self):
|
|
|
""" Called when the KernelManager channels have started listening or
|
|
|
when the frontend is assigned an already listening KernelManager.
|
|
|
"""
|
|
|
self.reset()
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'FrontendWidget' public interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def copy_raw(self):
|
|
|
""" Copy the currently selected text to the clipboard without attempting
|
|
|
to remove prompts or otherwise alter the text.
|
|
|
"""
|
|
|
self._control.copy()
|
|
|
|
|
|
def execute_file(self, path, hidden=False):
|
|
|
""" Attempts to execute file with 'path'. If 'hidden', no output is
|
|
|
shown.
|
|
|
"""
|
|
|
self.execute('execfile("%s")' % path, hidden=hidden)
|
|
|
|
|
|
def interrupt_kernel(self):
|
|
|
""" Attempts to interrupt the running kernel.
|
|
|
"""
|
|
|
if self.custom_interrupt:
|
|
|
self.custom_interrupt_requested.emit()
|
|
|
elif self.kernel_manager.has_kernel:
|
|
|
self.kernel_manager.interrupt_kernel()
|
|
|
else:
|
|
|
self._append_plain_text('Kernel process is either remote or '
|
|
|
'unspecified. Cannot interrupt.\n')
|
|
|
|
|
|
def reset(self):
|
|
|
""" Resets the widget to its initial state. Similar to ``clear``, but
|
|
|
also re-writes the banner and aborts execution if necessary.
|
|
|
"""
|
|
|
if self._executing:
|
|
|
self._executing = False
|
|
|
self._request_info['execute'] = None
|
|
|
self._reading = False
|
|
|
self._highlighter.highlighting_on = False
|
|
|
|
|
|
self._control.clear()
|
|
|
self._append_plain_text(self._get_banner())
|
|
|
self._show_interpreter_prompt()
|
|
|
|
|
|
def restart_kernel(self, message, now=False):
|
|
|
""" Attempts to restart the running kernel.
|
|
|
"""
|
|
|
# FIXME: now should be configurable via a checkbox in the dialog. Right
|
|
|
# now at least the heartbeat path sets it to True and the manual restart
|
|
|
# to False. But those should just be the pre-selected states of a
|
|
|
# checkbox that the user could override if so desired. But I don't know
|
|
|
# enough Qt to go implementing the checkbox now.
|
|
|
|
|
|
if self.custom_restart:
|
|
|
self.custom_restart_requested.emit()
|
|
|
|
|
|
elif self.kernel_manager.has_kernel:
|
|
|
# Pause the heart beat channel to prevent further warnings.
|
|
|
self.kernel_manager.hb_channel.pause()
|
|
|
|
|
|
# Prompt the user to restart the kernel. Un-pause the heartbeat if
|
|
|
# they decline. (If they accept, the heartbeat will be un-paused
|
|
|
# automatically when the kernel is restarted.)
|
|
|
buttons = QtGui.QMessageBox.Yes | QtGui.QMessageBox.No
|
|
|
result = QtGui.QMessageBox.question(self, 'Restart kernel?',
|
|
|
message, buttons)
|
|
|
if result == QtGui.QMessageBox.Yes:
|
|
|
try:
|
|
|
self.kernel_manager.restart_kernel(now=now)
|
|
|
except RuntimeError:
|
|
|
self._append_plain_text('Kernel started externally. '
|
|
|
'Cannot restart.\n')
|
|
|
else:
|
|
|
self.reset()
|
|
|
else:
|
|
|
self.kernel_manager.hb_channel.unpause()
|
|
|
|
|
|
else:
|
|
|
self._append_plain_text('Kernel process is either remote or '
|
|
|
'unspecified. Cannot restart.\n')
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'FrontendWidget' protected interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def _call_tip(self):
|
|
|
""" Shows a call tip, if appropriate, at the current cursor location.
|
|
|
"""
|
|
|
# Decide if it makes sense to show a call tip
|
|
|
cursor = self._get_cursor()
|
|
|
cursor.movePosition(QtGui.QTextCursor.Left)
|
|
|
if cursor.document().characterAt(cursor.position()).toAscii() != '(':
|
|
|
return False
|
|
|
context = self._get_context(cursor)
|
|
|
if not context:
|
|
|
return False
|
|
|
|
|
|
# Send the metadata request to the kernel
|
|
|
name = '.'.join(context)
|
|
|
msg_id = self.kernel_manager.xreq_channel.object_info(name)
|
|
|
pos = self._get_cursor().position()
|
|
|
self._request_info['call_tip'] = self._CallTipRequest(msg_id, pos)
|
|
|
return True
|
|
|
|
|
|
def _complete(self):
|
|
|
""" Performs completion at the current cursor location.
|
|
|
"""
|
|
|
context = self._get_context()
|
|
|
if context:
|
|
|
# Send the completion request to the kernel
|
|
|
msg_id = self.kernel_manager.xreq_channel.complete(
|
|
|
'.'.join(context), # text
|
|
|
self._get_input_buffer_cursor_line(), # line
|
|
|
self._get_input_buffer_cursor_column(), # cursor_pos
|
|
|
self.input_buffer) # block
|
|
|
pos = self._get_cursor().position()
|
|
|
info = self._CompletionRequest(msg_id, pos)
|
|
|
self._request_info['complete'] = info
|
|
|
|
|
|
def _get_banner(self):
|
|
|
""" Gets a banner to display at the beginning of a session.
|
|
|
"""
|
|
|
banner = 'Python %s on %s\nType "help", "copyright", "credits" or ' \
|
|
|
'"license" for more information.'
|
|
|
return banner % (sys.version, sys.platform)
|
|
|
|
|
|
def _get_context(self, cursor=None):
|
|
|
""" Gets the context for the specified cursor (or the current cursor
|
|
|
if none is specified).
|
|
|
"""
|
|
|
if cursor is None:
|
|
|
cursor = self._get_cursor()
|
|
|
cursor.movePosition(QtGui.QTextCursor.StartOfBlock,
|
|
|
QtGui.QTextCursor.KeepAnchor)
|
|
|
text = unicode(cursor.selection().toPlainText())
|
|
|
return self._completion_lexer.get_context(text)
|
|
|
|
|
|
def _process_execute_abort(self, msg):
|
|
|
""" Process a reply for an aborted execution request.
|
|
|
"""
|
|
|
self._append_plain_text("ERROR: execution aborted\n")
|
|
|
|
|
|
def _process_execute_error(self, msg):
|
|
|
""" Process a reply for an execution request that resulted in an error.
|
|
|
"""
|
|
|
content = msg['content']
|
|
|
traceback = ''.join(content['traceback'])
|
|
|
self._append_plain_text(traceback)
|
|
|
|
|
|
def _process_execute_ok(self, msg):
|
|
|
""" Process a reply for a successful execution equest.
|
|
|
"""
|
|
|
payload = msg['content']['payload']
|
|
|
for item in payload:
|
|
|
if not self._process_execute_payload(item):
|
|
|
warning = 'Warning: received unknown payload of type %s'
|
|
|
print(warning % repr(item['source']))
|
|
|
|
|
|
def _process_execute_payload(self, item):
|
|
|
""" Process a single payload item from the list of payload items in an
|
|
|
execution reply. Returns whether the payload was handled.
|
|
|
"""
|
|
|
# The basic FrontendWidget doesn't handle payloads, as they are a
|
|
|
# mechanism for going beyond the standard Python interpreter model.
|
|
|
return False
|
|
|
|
|
|
def _show_interpreter_prompt(self):
|
|
|
""" Shows a prompt for the interpreter.
|
|
|
"""
|
|
|
self._show_prompt('>>> ')
|
|
|
|
|
|
def _show_interpreter_prompt_for_reply(self, msg):
|
|
|
""" Shows a prompt for the interpreter given an 'execute_reply' message.
|
|
|
"""
|
|
|
self._show_interpreter_prompt()
|
|
|
|
|
|
#------ Signal handlers ----------------------------------------------------
|
|
|
|
|
|
def _document_contents_change(self, position, removed, added):
|
|
|
""" Called whenever the document's content changes. Display a call tip
|
|
|
if appropriate.
|
|
|
"""
|
|
|
# Calculate where the cursor should be *after* the change:
|
|
|
position += added
|
|
|
|
|
|
document = self._control.document()
|
|
|
if position == self._get_cursor().position():
|
|
|
self._call_tip()
|
|
|
|
