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# This file is part of the Frescobaldi project, http://www.frescobaldi.org/
#
# Copyright (c) 2008 - 2014 by Wilbert Berendsen
#
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# See http://www.gnu.org/licenses/ for more information.
"""
Helper application stuff.
"""
import os
import re
import subprocess
import sys
from PyQt5.QtCore import QSettings
from PyQt5.QtGui import QDesktopServices
from PyQt5.QtWidgets import QMessageBox
def shell_split(cmd):
"""Split a string like the UNIX shell, returning a list.
Double quoted parts are kept together with the quotes removed.
"""
# remove double quotes, keeping quoted parts together
# (because shlex does not yet work with unicode...)
return [item.replace('"', '') for item in
re.findall(r'[^\s"]*"[^"]*"[^\s"]*|[^\s"]+', cmd)]
def command(type):
"""Returns the command for the specified type as a list.
Returns None if no command was specified.
"""
cmd = QSettings().value("helper_applications/" + type, "")
if not cmd:
return
if os.path.isabs(cmd) and os.access(cmd, os.X_OK):
return [cmd]
return shell_split(cmd)
def openUrl(url, type="browser"):
"""Opens the specified QUrl, using the specified type."""
# be sure to pick a suitable type
if url.scheme() == "mailto":
type = "email"
elif type == "browser" and url.toLocalFile():
ext = os.path.splitext(url.toLocalFile())[1].lower()
if os.path.isdir(url.toLocalFile()):
type = "directory"
elif ext == '.pdf':
type = "pdf"
elif ext in ('.png', '.jpg', '.jpeg'):
type = "image"
elif ext in ('.midi', '.mid'):
type = "midi"
# get the command
cmd = command(type)
if not cmd:
if type != "shell":
QDesktopServices.openUrl(url)
return
for cmd in terminalCommands():
break # get the first
prog = cmd.pop(0)
workdir = None
if url.toLocalFile():
workdir = url.toLocalFile()
if type != "shell":
workdir = os.path.dirname(workdir)
if any('$f' in a or '$u' in a for a in cmd):
cmd = [a.replace('$u', url.toString())
if '$u' in a else a.replace('$f', url.toLocalFile())
for a in cmd]
elif type in ("browser", "email"):
cmd.append(url.toString())
elif type != "shell":
cmd.append(url.toLocalFile())
try:
subprocess.Popen([prog] + cmd, cwd=workdir)
except OSError:
QMessageBox.critical(None, _("Error"), _(
"Could not start {program}.\n"
"Please check path and permissions.").format(program=prog))
def terminalCommands():
"""Yields suitable commands to open a terminal/shell window.
There is always yielded at least one, which is suitable as default.
"""
if os.name == "nt":
yield ['cmd.exe']
elif sys.platform == 'darwin':
yield ['open', '-a', 'Terminal', '$f']
else:
# find a default linux terminal
paths = os.environ.get('PATH', os.defpath).split(os.pathsep)
for cmd in (
['lxterminal', '--working-directory=$f'],
['xfce4-terminal', '--working-directory=$f'],
['konsole', '--workdir', '$f'],
['gnome-terminal', '--working-directory=$f'],
):
for p in paths:
if p:
prog = os.path.join(p, cmd[0])
if os.access(prog, os.X_OK):
yield cmd
yield ['xterm']
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