716 lines
27 KiB
Python
716 lines
27 KiB
Python
# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:
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# Copyright 2014 Florian Bruhin (The Compiler) <mail@qutebrowser.org>
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#
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# This file is part of qutebrowser.
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#
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# qutebrowser is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# qutebrowser is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with qutebrowser. If not, see <http://www.gnu.org/licenses/>.
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"""Initialization of qutebrowser and application-wide things."""
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import os
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import sys
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import subprocess
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import configparser
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import signal
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import warnings
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import bdb
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import base64
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import functools
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import traceback
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from PyQt5.QtWidgets import QApplication, QDialog
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from PyQt5.QtCore import (pyqtSlot, qInstallMessageHandler, QTimer, QUrl,
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QStandardPaths, QObject, Qt)
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import qutebrowser
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from qutebrowser.commands import cmdutils, runners
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from qutebrowser.config import style, config, websettings
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from qutebrowser.network import qutescheme, proxy
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from qutebrowser.browser import quickmarks, cookies, downloads, cache
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from qutebrowser.widgets import mainwindow, crash
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from qutebrowser.keyinput import modeman
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from qutebrowser.utils import (log, version, message, readline, utils, qtutils,
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urlutils, debug, objreg, usertypes, standarddir,
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ipc, earlyinit)
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# We import utilcmds to run the cmdutils.register decorators.
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from qutebrowser.utils import utilcmds # pylint: disable=unused-import
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class Application(QApplication):
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"""Main application instance.
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Attributes:
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_args: ArgumentParser instance.
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_shutting_down: True if we're currently shutting down.
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_quit_status: The current quitting status.
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_crashdlg: The crash dialog currently open.
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_crashlogfile: A file handler to the fatal crash logfile.
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_event_filter: The EventFilter for the application.
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geometry: The geometry of the last closed main window.
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"""
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def __init__(self, args):
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"""Constructor.
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Args:
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Argument namespace from argparse.
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"""
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self._quit_status = {
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'crash': True,
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'tabs': False,
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'main': False,
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}
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self.geometry = None
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self._shutting_down = False
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self._crashdlg = None
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self._crashlogfile = None
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if args.debug:
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# We don't enable this earlier because some imports trigger
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# warnings (which are not our fault).
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warnings.simplefilter('default')
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qt_args = qtutils.get_args(args)
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log.init.debug("Qt arguments: {}, based on {}".format(qt_args, args))
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super().__init__(qt_args)
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sys.excepthook = self._exception_hook
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self._args = args
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objreg.register('args', args)
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objreg.register('app', self)
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if self._args.version:
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print(version.version())
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print()
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print()
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print(qutebrowser.__copyright__)
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print()
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print(version.GPL_BOILERPLATE.strip())
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sys.exit(0)
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sent = ipc.send_to_running_instance(self._args.command)
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if sent:
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sys.exit(0)
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log.init.debug("Starting init...")
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self.setQuitOnLastWindowClosed(False)
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self.setOrganizationName("qutebrowser")
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self.setApplicationName("qutebrowser")
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self.setApplicationVersion(qutebrowser.__version__)
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utils.actute_warning()
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self._init_modules()
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QTimer.singleShot(0, self._open_pages)
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log.init.debug("Initializing eventfilter...")
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self._event_filter = modeman.EventFilter(self)
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self.installEventFilter(self._event_filter)
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log.init.debug("Connecting signals...")
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self._connect_signals()
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log.init.debug("Applying python hacks...")
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self._python_hacks()
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log.init.debug("Starting IPC server...")
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ipc.init()
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log.init.debug("Init done!")
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if self._crashdlg is not None:
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self._crashdlg.raise_()
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def __repr__(self):
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return utils.get_repr(self)
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def _init_modules(self):
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"""Initialize all 'modules' which need to be initialized."""
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log.init.debug("Initializing readline-bridge...")
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readline_bridge = readline.ReadlineBridge()
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objreg.register('readline-bridge', readline_bridge)
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log.init.debug("Initializing directories...")
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standarddir.init()
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log.init.debug("Initializing config...")
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config.init(self._args)
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log.init.debug("Initializing crashlog...")
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self._handle_segfault()
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log.init.debug("Initializing websettings...")
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websettings.init()
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log.init.debug("Initializing quickmarks...")
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quickmark_manager = quickmarks.QuickmarkManager()
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objreg.register('quickmark-manager', quickmark_manager)
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log.init.debug("Initializing proxy...")
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proxy.init()
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log.init.debug("Initializing cookies...")
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cookie_jar = cookies.CookieJar(self)
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objreg.register('cookie-jar', cookie_jar)
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log.init.debug("Initializing cache...")
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diskcache = cache.DiskCache(self)
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objreg.register('cache', diskcache)
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log.init.debug("Initializing downloads...")
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download_manager = downloads.DownloadManager(self)
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objreg.register('download-manager', download_manager)
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log.init.debug("Initializing main window...")
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win_id = mainwindow.MainWindow.spawn(
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False if self._args.nowindow else True)
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main_window = objreg.get('main-window', scope='window', window=win_id)
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self.setActiveWindow(main_window)
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def _handle_segfault(self):
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"""Handle a segfault from a previous run."""
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path = standarddir.get(QStandardPaths.DataLocation)
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logname = os.path.join(path, 'crash.log')
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# First check if an old logfile exists.
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if os.path.exists(logname):
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with open(logname, 'r', encoding='ascii') as f:
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data = f.read()
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try:
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os.remove(logname)
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except PermissionError:
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log.init.warning("Could not remove crash log!")
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else:
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self._init_crashlogfile()
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if data:
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# Crashlog exists and has data in it, so something crashed
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# previously.
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self._crashdlg = crash.FatalCrashDialog(data)
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self._crashdlg.show()
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else:
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# There's no log file, so we can use this to display crashes to the
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# user on the next start.
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self._init_crashlogfile()
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def _init_crashlogfile(self):
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"""Start a new logfile and redirect faulthandler to it."""
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path = standarddir.get(QStandardPaths.DataLocation)
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logname = os.path.join(path, 'crash.log')
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self._crashlogfile = open(logname, 'w', encoding='ascii')
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earlyinit.init_faulthandler(self._crashlogfile)
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def _open_pages(self):
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"""Open startpage etc. and process commandline args."""
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self.process_args(self._args.command)
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self._open_startpage()
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self._open_quickstart()
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def _get_window(self, via_ipc, args):
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"""Helper function for process_args to get a window id.
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Args:
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via_ipc: Whether the request was made via IPC.
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args: The argument list.
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"""
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if not via_ipc:
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# Initial main window
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return 0
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window_to_raise = None
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open_target = config.get('general', 'new-instance-open-target')
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if open_target == 'window' or not args:
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win_id = mainwindow.MainWindow.spawn()
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window = objreg.get('main-window', scope='window', window=win_id)
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window_to_raise = window
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else:
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try:
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window = objreg.get('last-main-window')
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except KeyError:
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# We can't display an error here because... duh, there is no
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# window.
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log.ipc.error("No main window found!")
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return None
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win_id = window.win_id
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if open_target != 'tab-silent':
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window_to_raise = window
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if window_to_raise is not None:
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window_to_raise.setWindowState(window.windowState() &
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~Qt.WindowMinimized |
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Qt.WindowActive)
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window_to_raise.raise_()
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window_to_raise.activateWindow()
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self.alert(window_to_raise)
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return win_id
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def process_args(self, args, via_ipc=False):
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"""Process commandline args.
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URLs to open have no prefix, commands to execute begin with a colon.
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Args:
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args: A list of arguments to process.
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via_ipc: Whether the arguments were transmitted over IPC.
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"""
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win_id = self._get_window(via_ipc, args)
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if win_id is None:
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return
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if ipc and not args:
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self._open_startpage(win_id)
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for cmd in args:
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if cmd.startswith(':'):
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log.init.debug("Startup cmd {}".format(cmd))
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commandrunner = runners.CommandRunner(win_id)
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commandrunner.run_safely_init(cmd.lstrip(':'))
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elif not cmd:
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log.init.debug("Empty argument")
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win_id = mainwindow.MainWindow.spawn()
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else:
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tabbed_browser = objreg.get('tabbed-browser', scope='window',
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window=win_id)
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log.init.debug("Startup URL {}".format(cmd))
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try:
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url = urlutils.fuzzy_url(cmd)
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except urlutils.FuzzyUrlError as e:
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message.error(0, "Error in startup argument '{}': "
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"{}".format(cmd, e))
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else:
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tabbed_browser.tabopen(url)
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def _open_startpage(self, win_id=None):
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"""Open startpage.
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The startpage is never opened if the given windows are not empty.
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Args:
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win_id: If None, open startpage in all empty windows.
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If set, open the startpage in the given window.
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"""
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if win_id is not None:
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window_ids = [win_id]
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else:
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window_ids = objreg.window_registry
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for cur_win_id in window_ids:
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tabbed_browser = objreg.get('tabbed-browser', scope='window',
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window=cur_win_id)
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if tabbed_browser.count() == 0:
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log.init.debug("Opening startpage")
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for urlstr in config.get('general', 'startpage'):
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try:
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url = urlutils.fuzzy_url(urlstr)
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except urlutils.FuzzyUrlError as e:
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message.error(0, "Error when opening startpage: "
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"{}".format(e))
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tabbed_browser.tabopen(QUrl('about:blank'))
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else:
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tabbed_browser.tabopen(url)
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def _open_quickstart(self):
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"""Open quickstart if it's the first start."""
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state_config = objreg.get('state-config')
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try:
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quickstart_done = state_config['general']['quickstart-done'] == '1'
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except KeyError:
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quickstart_done = False
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if not quickstart_done:
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tabbed_browser = objreg.get('tabbed-browser', scope='window',
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window='current')
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tabbed_browser.tabopen(
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QUrl('http://www.qutebrowser.org/quickstart.html'))
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try:
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state_config.add_section('general')
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except configparser.DuplicateSectionError:
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pass
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state_config['general']['quickstart-done'] = '1'
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def _python_hacks(self):
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"""Get around some PyQt-oddities by evil hacks.
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This sets up the uncaught exception hook, quits with an appropriate
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exit status, and handles Ctrl+C properly by passing control to the
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Python interpreter once all 500ms.
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"""
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signal.signal(signal.SIGINT, self.interrupt)
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signal.signal(signal.SIGTERM, self.interrupt)
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timer = usertypes.Timer(self, 'python_hacks')
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timer.start(500)
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timer.timeout.connect(lambda: None)
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objreg.register('python-hack-timer', timer)
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def _connect_signals(self):
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"""Connect all signals to their slots."""
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config_obj = objreg.get('config')
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self.lastWindowClosed.connect(self.shutdown)
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config_obj.style_changed.connect(style.get_stylesheet.cache_clear)
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def _get_widgets(self):
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"""Get a string list of all widgets."""
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widgets = self.allWidgets()
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widgets.sort(key=lambda e: repr(e))
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return [repr(w) for w in widgets]
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def _get_pyqt_objects(self, lines, obj, depth=0):
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"""Recursive method for get_all_objects to get Qt objects."""
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for kid in obj.findChildren(QObject):
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lines.append(' ' * depth + repr(kid))
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self._get_pyqt_objects(lines, kid, depth + 1)
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def get_all_objects(self):
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"""Get all children of an object recursively as a string."""
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output = ['']
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widget_lines = self._get_widgets()
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widget_lines = [' ' + e for e in widget_lines]
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widget_lines.insert(0, "Qt widgets - {} objects".format(
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len(widget_lines)))
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output += widget_lines
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pyqt_lines = []
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self._get_pyqt_objects(pyqt_lines, self)
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pyqt_lines = [' ' + e for e in pyqt_lines]
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pyqt_lines.insert(0, 'Qt objects - {} objects:'.format(
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len(pyqt_lines)))
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output += pyqt_lines
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output += ['']
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output += objreg.dump_objects()
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return '\n'.join(output)
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def _recover_pages(self, forgiving=False):
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"""Try to recover all open pages.
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Called from _exception_hook, so as forgiving as possible.
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Args:
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forgiving: Whether to ignore exceptions.
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Return:
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A list containing a list for each window, which in turn contain the
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opened URLs.
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"""
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pages = []
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for win_id in objreg.window_registry:
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win_pages = []
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tabbed_browser = objreg.get('tabbed-browser', scope='window',
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window=win_id)
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for tab in tabbed_browser.widgets():
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try:
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urlstr = tab.cur_url.toString(
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QUrl.RemovePassword | QUrl.FullyEncoded)
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if urlstr:
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win_pages.append(urlstr)
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except Exception: # pylint: disable=broad-except
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if forgiving:
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log.destroy.exception("Error while recovering tab")
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else:
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raise
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pages.append(win_pages)
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return pages
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def _save_geometry(self):
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"""Save the window geometry to the state config."""
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if self.geometry is not None:
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state_config = objreg.get('state-config')
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geom = base64.b64encode(self.geometry).decode('ASCII')
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try:
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state_config.add_section('geometry')
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except configparser.DuplicateSectionError:
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pass
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state_config['geometry']['mainwindow'] = geom
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def _exception_hook(self, exctype, excvalue, tb):
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"""Handle uncaught python exceptions.
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It'll try very hard to write all open tabs to a file, and then exit
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gracefully.
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"""
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# pylint: disable=broad-except
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if exctype is bdb.BdbQuit or not issubclass(exctype, Exception):
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# pdb exit, KeyboardInterrupt, ...
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try:
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self.shutdown()
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return
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except Exception:
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log.init.exception("Error while shutting down")
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self.quit()
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return
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exc = (exctype, excvalue, tb)
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sys.__excepthook__(*exc)
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if not self._quit_status['crash']:
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log.misc.error("ARGH, there was an exception while the crash "
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"dialog is already shown:", exc_info=exc)
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return
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self._quit_status['crash'] = False
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try:
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pages = self._recover_pages(forgiving=True)
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except Exception:
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log.destroy.exception("Error while recovering pages")
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pages = []
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try:
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history = objreg.get('command-history')[-5:]
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except Exception:
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log.destroy.exception("Error while getting history: {}")
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history = []
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try:
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objects = self.get_all_objects()
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except Exception:
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log.destroy.exception("Error while getting objects")
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objects = ""
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try:
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self.lastWindowClosed.disconnect(self.shutdown)
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except TypeError:
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log.destroy.exception("Error while preventing shutdown")
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QApplication.closeAllWindows()
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self._crashdlg = crash.ExceptionCrashDialog(pages, history, exc,
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objects)
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ret = self._crashdlg.exec_()
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if ret == QDialog.Accepted: # restore
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self.restart(shutdown=False, pages=pages)
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# We might risk a segfault here, but that's better than continuing to
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# run in some undefined state, so we only do the most needed shutdown
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# here.
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qInstallMessageHandler(None)
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sys.exit(1)
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@cmdutils.register(instance='app', name=['quit', 'q'])
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def quit(self):
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"""Quit qutebrowser."""
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QApplication.closeAllWindows()
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@cmdutils.register(instance='app', ignore_args=True)
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def restart(self, shutdown=True, pages=None):
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"""Restart qutebrowser while keeping existing tabs open."""
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if pages is None:
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pages = self._recover_pages()
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log.destroy.debug("sys.executable: {}".format(sys.executable))
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log.destroy.debug("sys.path: {}".format(sys.path))
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log.destroy.debug("sys.argv: {}".format(sys.argv))
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log.destroy.debug("frozen: {}".format(hasattr(sys, 'frozen')))
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if os.path.basename(sys.argv[0]) == 'qutebrowser':
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# Launched via launcher script
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args = [sys.argv[0]]
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cwd = None
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elif hasattr(sys, 'frozen'):
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args = [sys.executable]
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cwd = os.path.abspath(os.path.dirname(sys.executable))
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else:
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args = [sys.executable, '-m', 'qutebrowser']
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cwd = os.path.join(os.path.abspath(os.path.dirname(
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qutebrowser.__file__)), '..')
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for arg in sys.argv[1:]:
|
|
if arg.startswith('-'):
|
|
# We only want to preserve options on a restart.
|
|
args.append(arg)
|
|
# Add all open pages so they get reopened.
|
|
page_args = []
|
|
for win in pages:
|
|
page_args.extend(win)
|
|
page_args.append('')
|
|
if page_args:
|
|
args.extend(page_args[:-1])
|
|
log.destroy.debug("args: {}".format(args))
|
|
log.destroy.debug("cwd: {}".format(cwd))
|
|
# Open a new process and immediately shutdown the existing one
|
|
if cwd is None:
|
|
subprocess.Popen(args)
|
|
else:
|
|
subprocess.Popen(args, cwd=cwd)
|
|
if shutdown:
|
|
self.shutdown()
|
|
|
|
@cmdutils.register(instance='app', split=False, debug=True)
|
|
def debug_pyeval(self, s):
|
|
"""Evaluate a python string and display the results as a webpage.
|
|
|
|
//
|
|
|
|
We have this here rather in utils.debug so the context of eval makes
|
|
more sense and because we don't want to import much stuff in the utils.
|
|
|
|
Args:
|
|
s: The string to evaluate.
|
|
"""
|
|
try:
|
|
r = eval(s) # pylint: disable=eval-used
|
|
out = repr(r)
|
|
except Exception: # pylint: disable=broad-except
|
|
out = traceback.format_exc()
|
|
qutescheme.pyeval_output = out
|
|
tabbed_browser = objreg.get('tabbed-browser', scope='window',
|
|
window='current')
|
|
tabbed_browser.openurl(QUrl('qute:pyeval'), newtab=True)
|
|
|
|
@cmdutils.register(instance='app')
|
|
def report(self):
|
|
"""Report a bug in qutebrowser."""
|
|
pages = self._recover_pages()
|
|
history = objreg.get('command-history')[-5:]
|
|
objects = self.get_all_objects()
|
|
self._crashdlg = crash.ReportDialog(pages, history, objects)
|
|
self._crashdlg.show()
|
|
|
|
def interrupt(self, signum, _frame):
|
|
"""Handler for signals to gracefully shutdown (SIGINT/SIGTERM).
|
|
|
|
This calls self.shutdown and remaps the signal to call
|
|
self.interrupt_forcefully the next time.
|
|
"""
|
|
log.destroy.info("SIGINT/SIGTERM received, shutting down!")
|
|
log.destroy.info("Do the same again to forcefully quit.")
|
|
signal.signal(signal.SIGINT, self.interrupt_forcefully)
|
|
signal.signal(signal.SIGTERM, self.interrupt_forcefully)
|
|
# If we call shutdown directly here, we get a segfault.
|
|
QTimer.singleShot(0, functools.partial(self.shutdown, 128 + signum))
|
|
|
|
def interrupt_forcefully(self, signum, _frame):
|
|
"""Interrupt forcefully on the second SIGINT/SIGTERM request.
|
|
|
|
This skips our shutdown routine and calls QApplication:exit instead.
|
|
It then remaps the signals to call self.interrupt_really_forcefully the
|
|
next time.
|
|
"""
|
|
log.destroy.info("Forceful quit requested, goodbye cruel world!")
|
|
log.destroy.info("Do the same again to quit with even more force.")
|
|
signal.signal(signal.SIGINT, self.interrupt_really_forcefully)
|
|
signal.signal(signal.SIGTERM, self.interrupt_really_forcefully)
|
|
# This *should* work without a QTimer, but because of the trouble in
|
|
# self.interrupt we're better safe than sorry.
|
|
QTimer.singleShot(0, functools.partial(self.exit, 128 + signum))
|
|
|
|
def interrupt_really_forcefully(self, signum, _frame):
|
|
"""Interrupt with even more force on the third SIGINT/SIGTERM request.
|
|
|
|
This doesn't run *any* Qt cleanup and simply exits via Python.
|
|
It will most likely lead to a segfault.
|
|
"""
|
|
log.destroy.info("WHY ARE YOU DOING THIS TO ME? :(")
|
|
sys.exit(128 + signum)
|
|
|
|
@pyqtSlot()
|
|
def shutdown(self, status=0):
|
|
"""Try to shutdown everything cleanly.
|
|
|
|
For some reason lastWindowClosing sometimes seem to get emitted twice,
|
|
so we make sure we only run once here.
|
|
|
|
Args:
|
|
status: The status code to exit with.
|
|
"""
|
|
if self._shutting_down:
|
|
return
|
|
self._shutting_down = True
|
|
log.destroy.debug("Shutting down with status {}...".format(status))
|
|
deferrer = False
|
|
for win_id in objreg.window_registry:
|
|
prompter = objreg.get('prompter', None, scope='window',
|
|
window=win_id)
|
|
if prompter is not None and prompter.shutdown():
|
|
deferrer = True
|
|
if deferrer:
|
|
# If shutdown was called while we were asking a question, we're in
|
|
# a still sub-eventloop (which gets quitted now) and not in the
|
|
# main one.
|
|
# This means we need to defer the real shutdown to when we're back
|
|
# in the real main event loop, or we'll get a segfault.
|
|
log.destroy.debug("Deferring real shutdown because question was "
|
|
"active.")
|
|
QTimer.singleShot(0, functools.partial(self._shutdown, status))
|
|
else:
|
|
# If we have no questions to shut down, we are already in the real
|
|
# event loop, so we can shut down immediately.
|
|
self._shutdown(status)
|
|
|
|
def _shutdown(self, status): # noqa
|
|
"""Second stage of shutdown."""
|
|
# pylint: disable=too-many-branches, too-many-statements
|
|
# FIXME refactor this
|
|
# https://github.com/The-Compiler/qutebrowser/issues/113
|
|
log.destroy.debug("Stage 2 of shutting down...")
|
|
# Remove eventfilter
|
|
try:
|
|
log.destroy.debug("Removing eventfilter...")
|
|
self.removeEventFilter(self._event_filter)
|
|
except AttributeError:
|
|
pass
|
|
# Close all tabs
|
|
for win_id in objreg.window_registry:
|
|
log.destroy.debug("Closing tabs in window {}...".format(win_id))
|
|
tabbed_browser = objreg.get('tabbed-browser', scope='window',
|
|
window=win_id)
|
|
tabbed_browser.shutdown()
|
|
# Shut down IPC
|
|
try:
|
|
objreg.get('ipc-server').shutdown()
|
|
except KeyError:
|
|
pass
|
|
# Save everything
|
|
try:
|
|
config_obj = objreg.get('config')
|
|
except KeyError:
|
|
log.destroy.debug("Config not initialized yet, so not saving "
|
|
"anything.")
|
|
else:
|
|
to_save = []
|
|
if config.get('general', 'auto-save-config'):
|
|
to_save.append(("config", config_obj.save))
|
|
try:
|
|
key_config = objreg.get('key-config')
|
|
except KeyError:
|
|
pass
|
|
else:
|
|
to_save.append(("keyconfig", key_config.save))
|
|
to_save += [("window geometry", self._save_geometry)]
|
|
try:
|
|
command_history = objreg.get('command-history')
|
|
except KeyError:
|
|
pass
|
|
else:
|
|
to_save.append(("command history", command_history.save))
|
|
try:
|
|
quickmark_manager = objreg.get('quickmark-manager')
|
|
except KeyError:
|
|
pass
|
|
else:
|
|
to_save.append(("command history", quickmark_manager.save))
|
|
try:
|
|
state_config = objreg.get('state-config')
|
|
except KeyError:
|
|
pass
|
|
else:
|
|
to_save.append(("window geometry", state_config.save))
|
|
try:
|
|
cookie_jar = objreg.get('cookie-jar')
|
|
except KeyError:
|
|
pass
|
|
else:
|
|
to_save.append(("cookies", cookie_jar.save))
|
|
for what, handler in to_save:
|
|
log.destroy.debug("Saving {} (handler: {})".format(
|
|
what, utils.qualname(handler)))
|
|
try:
|
|
handler()
|
|
except AttributeError as e:
|
|
log.destroy.warning("Could not save {}.".format(what))
|
|
log.destroy.debug(e)
|
|
# If we don't kill our custom handler here we might get segfaults
|
|
log.destroy.debug("Deactiving message handler...")
|
|
qInstallMessageHandler(None)
|
|
# Now we can hopefully quit without segfaults
|
|
log.destroy.debug("Deferring QApplication::exit...")
|
|
# We use a singleshot timer to exit here to minimize the likelyhood of
|
|
# segfaults.
|
|
QTimer.singleShot(0, functools.partial(self.exit, status))
|
|
|
|
def exit(self, status):
|
|
"""Extend QApplication::exit to log the event."""
|
|
log.destroy.debug("Now calling QApplication::exit.")
|
|
if self._args.debug_exit:
|
|
print("Now logging late shutdown.", file=sys.stderr)
|
|
debug.trace_lines(True)
|
|
super().exit(status)
|