|
|
# System library imports
|
|
|
from IPython.external.qt import QtGui
|
|
|
|
|
|
# Local imports
|
|
|
from IPython.utils.py3compat import unicode_type
|
|
|
from IPython.utils.traitlets import Bool
|
|
|
from .console_widget import ConsoleWidget
|
|
|
|
|
|
|
|
|
class HistoryConsoleWidget(ConsoleWidget):
|
|
|
""" A ConsoleWidget that keeps a history of the commands that have been
|
|
|
executed and provides a readline-esque interface to this history.
|
|
|
"""
|
|
|
|
|
|
#------ Configuration ------------------------------------------------------
|
|
|
|
|
|
# If enabled, the input buffer will become "locked" to history movement when
|
|
|
# an edit is made to a multi-line input buffer. To override the lock, use
|
|
|
# Shift in conjunction with the standard history cycling keys.
|
|
|
history_lock = Bool(False, config=True)
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'object' interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def __init__(self, *args, **kw):
|
|
|
super(HistoryConsoleWidget, self).__init__(*args, **kw)
|
|
|
|
|
|
# HistoryConsoleWidget protected variables.
|
|
|
self._history = []
|
|
|
self._history_edits = {}
|
|
|
self._history_index = 0
|
|
|
self._history_prefix = ''
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'ConsoleWidget' public interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def execute(self, source=None, hidden=False, interactive=False):
|
|
|
""" Reimplemented to the store history.
|
|
|
"""
|
|
|
if not hidden:
|
|
|
history = self.input_buffer if source is None else source
|
|
|
|
|
|
executed = super(HistoryConsoleWidget, self).execute(
|
|
|
source, hidden, interactive)
|
|
|
|
|
|
if executed and not hidden:
|
|
|
# Save the command unless it was an empty string or was identical
|
|
|
# to the previous command.
|
|
|
history = history.rstrip()
|
|
|
if history and (not self._history or self._history[-1] != history):
|
|
|
self._history.append(history)
|
|
|
|
|
|
# Emulate readline: reset all history edits.
|
|
|
self._history_edits = {}
|
|
|
|
|
|
# Move the history index to the most recent item.
|
|
|
self._history_index = len(self._history)
|
|
|
|
|
|
return executed
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'ConsoleWidget' abstract interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def _up_pressed(self, shift_modifier):
|
|
|
""" Called when the up key is pressed. Returns whether to continue
|
|
|
processing the event.
|
|
|
"""
|
|
|
prompt_cursor = self._get_prompt_cursor()
|
|
|
if self._get_cursor().blockNumber() == prompt_cursor.blockNumber():
|
|
|
# Bail out if we're locked.
|
|
|
if self._history_locked() and not shift_modifier:
|
|
|
return False
|
|
|
|
|
|
# Set a search prefix based on the cursor position.
|
|
|
col = self._get_input_buffer_cursor_column()
|
|
|
input_buffer = self.input_buffer
|
|
|
# use the *shortest* of the cursor column and the history prefix
|
|
|
# to determine if the prefix has changed
|
|
|
n = min(col, len(self._history_prefix))
|
|
|
|
|
|
# prefix changed, restart search from the beginning
|
|
|
if (self._history_prefix[:n] != input_buffer[:n]):
|
|
|
self._history_index = len(self._history)
|
|
|
|
|
|
# the only time we shouldn't set the history prefix
|
|
|
# to the line up to the cursor is if we are already
|
|
|
# in a simple scroll (no prefix),
|
|
|
# and the cursor is at the end of the first line
|
|
|
|
|
|
# check if we are at the end of the first line
|
|
|
c = self._get_cursor()
|
|
|
current_pos = c.position()
|
|
|
c.movePosition(QtGui.QTextCursor.EndOfLine)
|
|
|
at_eol = (c.position() == current_pos)
|
|
|
|
|
|
if self._history_index == len(self._history) or \
|
|
|
not (self._history_prefix == '' and at_eol) or \
|
|
|
not (self._get_edited_history(self._history_index)[:col] == input_buffer[:col]):
|
|
|
self._history_prefix = input_buffer[:col]
|
|
|
|
|
|
# Perform the search.
|
|
|
self.history_previous(self._history_prefix,
|
|
|
as_prefix=not shift_modifier)
|
|
|
|
|
|
# Go to the first line of the prompt for seemless history scrolling.
|
|
|
# Emulate readline: keep the cursor position fixed for a prefix
|
|
|
# search.
|
|
|
cursor = self._get_prompt_cursor()
|
|
|
if self._history_prefix:
|
|
|
cursor.movePosition(QtGui.QTextCursor.Right,
|
|
|
n=len(self._history_prefix))
|
|
|
else:
|
|
|
cursor.movePosition(QtGui.QTextCursor.EndOfLine)
|
|
|
self._set_cursor(cursor)
|
|
|
|
|
|
return False
|
|
|
|
|
|
return True
|
|
|
|
|
|
def _down_pressed(self, shift_modifier):
|
|
|
""" Called when the down key is pressed. Returns whether to continue
|
|
|
processing the event.
|
|
|
"""
|
|
|
end_cursor = self._get_end_cursor()
|
|
|
if self._get_cursor().blockNumber() == end_cursor.blockNumber():
|
|
|
# Bail out if we're locked.
|
|
|
if self._history_locked() and not shift_modifier:
|
|
|
return False
|
|
|
|
|
|
# Perform the search.
|
|
|
replaced = self.history_next(self._history_prefix,
|
|
|
as_prefix=not shift_modifier)
|
|
|
|
|
|
# Emulate readline: keep the cursor position fixed for a prefix
|
|
|
# search. (We don't need to move the cursor to the end of the buffer
|
|
|
# in the other case because this happens automatically when the
|
|
|
# input buffer is set.)
|
|
|
if self._history_prefix and replaced:
|
|
|
cursor = self._get_prompt_cursor()
|
|
|
cursor.movePosition(QtGui.QTextCursor.Right,
|
|
|
n=len(self._history_prefix))
|
|
|
self._set_cursor(cursor)
|
|
|
|
|
|
return False
|
|
|
|
|
|
return True
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'HistoryConsoleWidget' public interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def history_previous(self, substring='', as_prefix=True):
|
|
|
""" If possible, set the input buffer to a previous history item.
|
|
|
|
|
|
Parameters:
|
|
|
-----------
|
|
|
substring : str, optional
|
|
|
If specified, search for an item with this substring.
|
|
|
as_prefix : bool, optional
|
|
|
If True, the substring must match at the beginning (default).
|
|
|
|
|
|
Returns:
|
|
|
--------
|
|
|
Whether the input buffer was changed.
|
|
|
"""
|
|
|
index = self._history_index
|
|
|
replace = False
|
|
|
while index > 0:
|
|
|
index -= 1
|
|
|
history = self._get_edited_history(index)
|
|
|
if (as_prefix and history.startswith(substring)) \
|
|
|
or (not as_prefix and substring in history):
|
|
|
replace = True
|
|
|
break
|
|
|
|
|
|
if replace:
|
|
|
self._store_edits()
|
|
|
self._history_index = index
|
|
|
self.input_buffer = history
|
|
|
|
|
|
return replace
|
|
|
|
|
|
def history_next(self, substring='', as_prefix=True):
|
|
|
""" If possible, set the input buffer to a subsequent history item.
|
|
|
|
|
|
Parameters:
|
|
|
-----------
|
|
|
substring : str, optional
|
|
|
If specified, search for an item with this substring.
|
|
|
as_prefix : bool, optional
|
|
|
If True, the substring must match at the beginning (default).
|
|
|
|
|
|
Returns:
|
|
|
--------
|
|
|
Whether the input buffer was changed.
|
|
|
"""
|
|
|
index = self._history_index
|
|
|
replace = False
|
|
|
while index < len(self._history):
|
|
|
index += 1
|
|
|
history = self._get_edited_history(index)
|
|
|
if (as_prefix and history.startswith(substring)) \
|
|
|
or (not as_prefix and substring in history):
|
|
|
replace = True
|
|
|
break
|
|
|
|
|
|
if replace:
|
|
|
self._store_edits()
|
|
|
self._history_index = index
|
|
|
self.input_buffer = history
|
|
|
|
|
|
return replace
|
|
|
|
|
|
def history_tail(self, n=10):
|
|
|
""" Get the local history list.
|
|
|
|
|
|
Parameters:
|
|
|
-----------
|
|
|
n : int
|
|
|
The (maximum) number of history items to get.
|
|
|
"""
|
|
|
return self._history[-n:]
|
|
|
|
|
|
def _request_update_session_history_length(self):
|
|
|
msg_id = self.kernel_client.shell_channel.execute('',
|
|
|
silent=True,
|
|
|
user_expressions={
|
|
|
'hlen':'len(get_ipython().history_manager.input_hist_raw)',
|
|
|
}
|
|
|
)
|
|
|
self._request_info['execute'][msg_id] = self._ExecutionRequest(msg_id, 'save_magic')
|
|
|
|
|
|
def _handle_execute_reply(self, msg):
|
|
|
""" Handles replies for code execution, here only session history length
|
|
|
"""
|
|
|
msg_id = msg['parent_header']['msg_id']
|
|
|
info = self._request_info['execute'].pop(msg_id,None)
|
|
|
if info and info.kind == 'save_magic' and not self._hidden:
|
|
|
content = msg['content']
|
|
|
status = content['status']
|
|
|
if status == 'ok':
|
|
|
self._max_session_history = int(
|
|
|
content['user_expressions']['hlen']['data']['text/plain']
|
|
|
)
|
|
|
|
|
|
def save_magic(self):
|
|
|
# update the session history length
|
|
|
self._request_update_session_history_length()
|
|
|
|
|
|
file_name,extFilter = QtGui.QFileDialog.getSaveFileName(self,
|
|
|
"Enter A filename",
|
|
|
filter='Python File (*.py);; All files (*.*)'
|
|
|
)
|
|
|
|
|
|
# let's the user search/type for a file name, while the history length
|
|
|
# is fetched
|
|
|
|
|
|
if file_name:
|
|
|
hist_range, ok = QtGui.QInputDialog.getText(self,
|
|
|
'Please enter an interval of command to save',
|
|
|
'Saving commands:',
|
|
|
text=str('1-'+str(self._max_session_history))
|
|
|
)
|
|
|
if ok:
|
|
|
self.execute("%save"+" "+file_name+" "+str(hist_range))
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'HistoryConsoleWidget' protected interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def _history_locked(self):
|
|
|
""" Returns whether history movement is locked.
|
|
|
"""
|
|
|
return (self.history_lock and
|
|
|
(self._get_edited_history(self._history_index) !=
|
|
|
self.input_buffer) and
|
|
|
(self._get_prompt_cursor().blockNumber() !=
|
|
|
self._get_end_cursor().blockNumber()))
|
|
|
|
|
|
def _get_edited_history(self, index):
|
|
|
""" Retrieves a history item, possibly with temporary edits.
|
|
|
"""
|
|
|
if index in self._history_edits:
|
|
|
return self._history_edits[index]
|
|
|
elif index == len(self._history):
|
|
|
return unicode_type()
|
|
|
return self._history[index]
|
|
|
|
|
|
def _set_history(self, history):
|
|
|
""" Replace the current history with a sequence of history items.
|
|
|
"""
|
|
|
self._history = list(history)
|
|
|
self._history_edits = {}
|
|
|
self._history_index = len(self._history)
|
|
|
|
|
|
def _store_edits(self):
|
|
|
""" If there are edits to the current input buffer, store them.
|
|
|
"""
|
|
|
current = self.input_buffer
|
|
|
if self._history_index == len(self._history) or \
|
|
|
self._history[self._history_index] != current:
|
|
|
self._history_edits[self._history_index] = current
|
|
|
|
