125 lines
3.4 KiB
Python
125 lines
3.4 KiB
Python
# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:
|
|
|
|
# Copyright 2014 Florian Bruhin (The Compiler) <mail@qutebrowser.org>
|
|
#
|
|
# This file is part of qutebrowser.
|
|
#
|
|
# qutebrowser is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# qutebrowser is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with qutebrowser. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
"""Command history for the status bar."""
|
|
|
|
from PyQt5.QtCore import pyqtSlot
|
|
|
|
from qutebrowser.utils import usertypes, log
|
|
|
|
|
|
class HistoryEmptyError(Exception):
|
|
|
|
"""Raised when the history is empty."""
|
|
|
|
pass
|
|
|
|
|
|
class HistoryEndReachedError(Exception):
|
|
|
|
"""Raised when the end of the history is reached."""
|
|
|
|
pass
|
|
|
|
|
|
class History:
|
|
|
|
"""Command history.
|
|
|
|
Attributes:
|
|
history: A list of executed commands, with newer commands at the end.
|
|
_tmphist: Temporary history for history browsing (as NeighborList)
|
|
"""
|
|
|
|
def __init__(self, history=None):
|
|
"""Constructor.
|
|
|
|
Args:
|
|
history: The initial history to set.
|
|
"""
|
|
self._tmphist = None
|
|
if history is None:
|
|
self.history = []
|
|
else:
|
|
self.history = history
|
|
|
|
def __getitem__(self, idx):
|
|
return self.history[idx]
|
|
|
|
def is_browsing(self):
|
|
"""Check _tmphist to see if we're browsing."""
|
|
return self._tmphist is not None
|
|
|
|
def start(self, text):
|
|
"""Start browsing to the history.
|
|
|
|
Called when the user presses the up/down key and wasn't browsing the
|
|
history already.
|
|
|
|
Args:
|
|
text: The preset text.
|
|
"""
|
|
log.misc.debug("Preset text: '{}'".format(text))
|
|
if text:
|
|
items = [e for e in self.history if e.startswith(text)]
|
|
else:
|
|
items = self.history
|
|
if not items:
|
|
raise HistoryEmptyError
|
|
self._tmphist = usertypes.NeighborList(items)
|
|
return self._tmphist.lastitem()
|
|
|
|
@pyqtSlot()
|
|
def stop(self):
|
|
"""Stop browsing the history."""
|
|
self._tmphist = None
|
|
|
|
def previtem(self):
|
|
"""Get the previous item in the temp history.
|
|
|
|
start() needs to be called before calling this.
|
|
"""
|
|
if not self.is_browsing():
|
|
raise ValueError("Currently not browsing history")
|
|
try:
|
|
return self._tmphist.previtem()
|
|
except IndexError:
|
|
raise HistoryEndReachedError
|
|
|
|
def nextitem(self):
|
|
"""Get the next item in the temp history.
|
|
|
|
start() needs to be called before calling this.
|
|
"""
|
|
if not self.is_browsing():
|
|
raise ValueError("Currently not browsing history")
|
|
try:
|
|
return self._tmphist.nextitem()
|
|
except IndexError:
|
|
raise HistoryEndReachedError
|
|
|
|
def append(self, text):
|
|
"""Append a new item to the history.
|
|
|
|
Args:
|
|
text: The text to append.
|
|
"""
|
|
if not self.history or text != self.history[-1]:
|
|
self.history.append(text)
|