#!@TERMUX_PREFIX@/bin/env python

# openbox-xdg-autostart runs things based on the XDG autostart specification
# Copyright (C) 2008       Dana Jansens
#
# XDG autostart specification can be found here:
# http://standards.freedesktop.org/autostart-spec/
#
#
#
# LICENSE:
#   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.

ME="openbox-xdg-autostart"
VERSION="1.1"

import os, glob, sys
try:
    from xdg import BaseDirectory
    from xdg.DesktopEntry import DesktopEntry
    from xdg.Exceptions import ParsingError
except ImportError:
    print()
    print("ERROR:", ME, "requires PyXDG to be installed", file=sys.stderr)
    print()
    sys.exit(1)

def main(argv=sys.argv):
    if "--help" in argv[1:]:
        show_help()
        return 0
    if "--version" in argv[1:]:
        show_version()
        return 0

    # get the autostart directories
    autodirs = BaseDirectory.load_config_paths("autostart")

    # find all the autostart files
    files = []
    for dir in autodirs:
        for path in glob.glob(os.path.join(dir, '*.desktop')):
            try:
                autofile = AutostartFile(path)
            except ParsingError:
                print("Invalid .desktop file: " + path)
            else:
                if not autofile in files:
                    files.append(autofile)

    list = False
    if "--list" in argv[1:]:
        list = True
        argv.remove("--list")

    # run them !
    environments = argv[1:]
    for autofile in files:
        if list: autofile.display(environments)
        else: autofile.run(environments)

class AutostartFile:
    def __init__(self, path):
        self.path = path
        self.filename = os.path.basename(path)
        self.dirname = os.path.dirname(path)
        self.de = DesktopEntry(path)

    def __eq__(self, other):
        return self.filename == other.filename

    def __str__(self):
        return self.path + " : " + self.de.getName()

    def _isexecfile(self, path):
        return os.access(path, os.X_OK)

    def _findFile(self, path, search, match_func):
        # check empty path
        if not path: return None
        # check absolute path
        if path[0] == '/':
            if match_func(path): return path
            else: return None
        else:
            # check relative path
            for dirname in search.split(os.pathsep):
                if dirname != "":
                    candidate = os.path.join(dirname, path)
                    if (match_func(candidate)): return candidate

    def _alert(self, str, info=False):
        if info:
            print("\t ", str)
        else:
            print("\t*", str)

    def _showInEnvironment(self, envs, verbose=False):
        default = not self.de.getOnlyShowIn()
        noshow = False
        force = False
        for i in self.de.getOnlyShowIn():
            if i in envs: force = True
        for i in self.de.getNotShowIn():
            if i in envs: noshow = True

        if verbose:
            if not default and not force:
                s = ""
                for i in self.de.getOnlyShowIn():
                    if s: s += ", "
                    s += i
                self._alert("Excluded by: OnlyShowIn (" + s + ")")
            if default and noshow and not force:
                s = ""
                for i in self.de.getNotShowIn():
                    if s: s += ", "
                    s += i
                self._alert("Excluded by: NotShowIn (" + s + ")")
        return (default and not noshow) or force

    def _shouldRun(self, envs, verbose=False):
        if not self.de.getExec():
            if verbose: self._alert("Excluded by: Missing Exec field")
            return False
        if self.de.getHidden():
            if verbose: self._alert("Excluded by: Hidden")
            return False
        if self.de.getTryExec():
            if not self._findFile(self.de.getTryExec(), os.getenv("PATH"),
                                  self._isexecfile):
                if verbose: self._alert("Excluded by: TryExec (" +
                                        self.de.getTryExec() + ")")
                return False
        if not self._showInEnvironment(envs, verbose):
            return False
        return True

    def display(self, envs):
        if self._shouldRun(envs):
            print("[*] " + self.de.getName())
        else:
            print("[ ] " + self.de.getName())
        self._alert("File: " + self.path, info=True)
        if self.de.getExec():
            self._alert("Executes: " + self.de.getExec(), info=True)
        self._shouldRun(envs, True)
        print()

    def run(self, envs):
        here = os.getcwd()
        if self.de.getPath():
            os.chdir(self.de.getPath())
        if self._shouldRun(envs):
            args = ["/bin/sh", "-c", "exec " + self.de.getExec()]
            os.spawnv(os.P_NOWAIT, args[0], args);
        os.chdir(here)

def show_help():
    print("Usage:", ME, "[OPTION]... [ENVIRONMENT]...")
    print()
    print("This tool will run xdg autostart .desktop files")
    print()
    print("OPTIONS")
    print("  --list        Show a list of the files which would be run")
    print("                Files which would be run are marked with an asterix")
    print("                symbol [*].  For files which would not be run,")
    print("                information is given for why they are excluded")
    print("  --help        Show this help and exit")
    print("  --version     Show version and copyright information")
    print()
    print("ENVIRONMENT specifies a list of environments for which to run autostart")
    print("applications.  If none are specified, only applications which do not ")
    print("limit themselves to certain environments will be run.")
    print()
    print("ENVIRONMENT can be one or more of:")
    print("  GNOME         Gnome Desktop")
    print("  KDE           KDE Desktop")
    print("  ROX           ROX Desktop")
    print("  XFCE          XFCE Desktop")
    print("  Old           Legacy systems")
    print()

def show_version():
    print(ME, VERSION)
    print("Copyright (c) 2008        Dana Jansens")
    print()

if __name__ == "__main__":
        sys.exit(main())
