Current File : //usr/lib/python3/dist-packages/DistUpgrade/QUrlOpener.py
# QUrlOpener.py
# -*- Mode: Python; indent-tabs-mode: nil; tab-width: 4; coding: utf-8 -*-
#
# Copyright (c) 2014-2018 Harald Sitter <apachelogger@kubuntu.org>
#
# This program 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 2 of the
# License, or (at your option) any later version.
#
# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
try:
# 14.04 has a broken pyqt5, so don't even try to import it and require
# pyqt4.
# In 14.04 various signals in pyqt5 can not be connected because it thinks
# the signal does not exist or has an incompatible signature. Since this
# potentially renders the GUI entirely broken and pyqt5 was not actively
# used back then it is fair to simply require qt4 on trusty systems.
from .utils import get_dist
if get_dist() == 'trusty':
raise ImportError
from PyQt5.QtCore import QObject, QCoreApplication, pyqtSlot, QUrl
from PyQt5.QtGui import QDesktopServices
except ImportError:
from PyQt4.QtCore import QObject, QCoreApplication, pyqtSlot, QUrl
from PyQt4.QtGui import QDesktopServices
import os
import subprocess
def singleton(class_):
instances = {}
def instance(*args, **kwargs):
if class_ not in instances:
instances[class_] = class_(*args, **kwargs)
return instances[class_]
return instance
@singleton
class QUrlOpener(QObject):
def __init__(self):
QObject.__init__(self)
self.setParent(QCoreApplication.instance())
def setupUrlHandles(self):
# Make sure we don't run a root browser.
# NOTE: Qt native API can set an openUrl handler from a QObject
# function, pyqt in theory also allows an arbitrary callable. Latter
# has been observed to be non-functional so rely on the native handling
QDesktopServices.setUrlHandler('http', self, 'openUrl')
QDesktopServices.setUrlHandler('https', self, 'openUrl')
# NOTE: largely code copy from ReleaseNotesViewer which imports GTK.
@pyqtSlot(QUrl)
def openUrl(self, url):
url = url.toString()
"""Open the specified URL in a browser"""
# Find an appropiate browser
if os.path.exists("/usr/bin/xdg-open"):
command = ["xdg-open", url]
elif os.path.exists("/usr/bin/kde-open"):
command = ["kde-open", url]
elif os.path.exists("/usr/bin/exo-open"):
command = ["exo-open", url]
elif os.path.exists('/usr/bin/gnome-open'):
command = ['gnome-open', url]
else:
command = ['x-www-browser', url]
# Avoid to run the browser as user root
if os.getuid() == 0 and 'SUDO_USER' in os.environ:
command = ['sudo',
'--set-home',
'-u', os.environ['SUDO_USER']] + command
subprocess.Popen(command)
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