/usr/lib/python3/dist-packages/libertine/AppDiscovery.py is in python3-libertine 1.0.0+16.04.20160411-0ubuntu1.
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#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 3, as published
# by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranties of
# MERCHANTABILITY, SATISFACTORY QUALITY, 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/>.
from . import utils
from xdg.BaseDirectory import xdg_data_dirs
import configparser
import glob
import io
import json
import os
import re
import sys
class IconCache(object):
"""
Caches the names of all icon files available in the standard places (possibly
in a container) and provides a search function to deliver icon file names
matching a given icon name.
See the `Freedesktop.org icon theme specification
<http://standards.freedesktop.org/icon-theme-spec/icon-theme-spec-latest.html>`_
for the detailed specification.
"""
def __init__(self, root_path, file_loader=None):
"""
:param root_path: Where to start the file scan.
:type root_path: A valid filesystem path string.
:param file_loader: A function that builds a cache of filenames.
:type file_loader: Function returning a list of filenames.
"""
if file_loader:
self._icon_cache = file_loader(root_path)
else:
self._icon_cache = self._file_loader(root_path)
def _get_icon_search_paths(self, root_path):
"""
Gets a list of paths on which to search for icons.
:param root_path: Where to start the file scan.
:type root_path: A valid filesystem path string.
:rtype: A list of filesystem patch to serarch for qualifying icon files.
"""
icon_search_paths = []
icon_search_paths.append(os.path.join(root_path, os.environ['HOME'], ".icons"))
for d in reversed(xdg_data_dirs):
icon_search_paths.append(os.path.join(root_path, d.lstrip('/'), "icons"))
icon_search_paths.append(os.path.join(root_path, "usr/share/pixmaps"))
return icon_search_paths
def _file_loader(self, root_path):
"""
Loads a cache of file names by scanning the filesystem rooted at
``root_path``.
:param root_path: Where to start the file scan.
:type root_path: A valid filesystem path.
:rtype: A list of fully-qualified file paths.
"""
file_names = []
pattern = re.compile(r".*\.(png|svg|xpm)")
for path in self._get_icon_search_paths(root_path):
for base, dirs, files in os.walk(path):
for file in files:
if pattern.match(file):
file_names.append(os.path.join(base, file))
return file_names
def _find_icon_files(self, icon_name):
"""
Finds a list of file name strings matching the given icon name.
:param icon_name: An icon name, pobably from a .desktop file.
:rtype: A list of filename strings matching the icon name.
"""
icon_file_names = []
match_string = r"/" + os.path.splitext(icon_name)[0] + r"\....$"
pattern = re.compile(match_string)
for icon_file in self._icon_cache:
if pattern.search(icon_file):
icon_file_names.append(icon_file)
return icon_file_names
def expand_icons(self, desktop_icon_list):
"""
Expands a string containing a list of icon names into a list of matching
file names.
:param desktop_icon_list: A string containing a list of icon names
separated by semicolons.
:rtype: A list of filename stings matching the icon names passed in.
See `the Freedesktop.org desktop file specification
<http://standards.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html#recognized-keys>`_
for more information.
"""
if desktop_icon_list:
icon_list = desktop_icon_list.split(';')
if icon_list[0][0] == '/':
return icon_list
icon_files = []
for i in icon_list:
icon_files += self._find_icon_files(i)
return icon_files
return []
def expand_mime_types(desktop_mime_types):
if desktop_mime_types:
return desktop_mime_types.split(';')
return []
class AppInfo(object):
def __init__(self, desktop_file_name, config_entry, icon_cache):
self.desktop_file_name = desktop_file_name
self.name = config_entry.get('Name')
if not self.name:
raise RuntimeError("required Name attribute is missing")
d = config_entry.get('NoDisplay')
self.no_display = (d != None and d == 'true')
self.exec_line = config_entry.get('Exec')
if not self.exec_line:
raise RuntimeError("required Exec attribute is missing")
self.icons = icon_cache.expand_icons(config_entry.get('Icon'))
self.mime_types = expand_mime_types(config_entry.get('MimeType'))
def __str__(self):
with io.StringIO() as ostr:
print(self.name, file=ostr)
print(" desktop_file={}".format(self.desktop_file_name), file=ostr)
print(" no-display={}".format(self.no_display), file=ostr)
print(" exec='{}'".format(self.exec_line), file=ostr)
for icon in self.icons:
print(" icon: {}".format(icon), file=ostr)
for mime in self.mime_types:
print(" mime: {}".format(mime), file=ostr)
return ostr.getvalue()
def to_json(self):
return json.dumps(self.__dict__)
def desktop_file_is_showable(desktop_entry):
"""
Determines if a particular application entry should be reported: the entry
can not be hidden and must be showable in Unity.
"""
t = desktop_entry.get('Type')
if t != 'Application':
return False
n = desktop_entry.get('Hidden')
if n and n == 'true':
return False
n = desktop_entry.get('NoShowIn')
if n:
targets = n.split(';')
if 'Unity' in targets:
return False
n = desktop_entry.get('OnlyShowIn')
if n:
targets = n.split(';')
if 'Unity' not in targets:
return False
return True
def get_app_info(desktop_path, icon_cache):
for desktop_file_name in glob.glob(desktop_path):
desktop_file = configparser.ConfigParser(strict=False, interpolation=None)
try:
desktop_file.read(desktop_file_name)
desktop_entry = desktop_file['Desktop Entry']
if desktop_file_is_showable(desktop_entry):
yield AppInfo(desktop_file_name, desktop_entry, icon_cache)
except Exception as ex:
print("error processing {}: {}".format(desktop_file_name, ex), file=sys.stderr)
class AppLauncherCache(object):
"""
Caches a list of application launcher information (derived from .desktop
files installed in a container.
"""
def __init__(self, name, root_path):
self.name = name
self.app_launchers = []
icon_cache = IconCache(root_path)
for dir in reversed(xdg_data_dirs):
path = os.path.join(root_path, dir.lstrip('/'), "applications")
for app_info in get_app_info(os.path.join(path, "*.desktop"), icon_cache):
self.app_launchers.append(app_info)
def __str__(self):
with io.StringIO() as ostr:
print("{}\n".format(self.name), file=ostr)
for app_info in self.app_launchers:
print(" {}".format(app_info), file=ostr)
return ostr.getvalue()
def to_json(self):
return json.dumps(self,
default=lambda o: o.__dict__,
sort_keys=True,
indent=4)
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