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import logging
import os
import sys
import threading
import time
import fsboot
from fsbc.paths import Paths
from fsbc.settings import Settings
from fsbc.system import windows, macosx
from fsbc.util import memoize
logger = logging.getLogger("APP")
class Application(object):
app_name = ""
app_version = ""
_instance = None
@classmethod
def instance(cls):
"""
:rtype : Application
"""
return cls._instance
@classmethod
def get_instance(cls):
"""
:deprecated
"""
return cls._instance
@classmethod
def get(cls):
"""
:deprecated
"""
return cls._instance
@classmethod
def set_instance(cls, instance):
"""
:type instance: Application
"""
if cls._instance:
raise RuntimeError("An application instance already exists")
# logger.warning("An application instance already exists")
# noinspection PyAttributeOutsideInit
cls._instance = instance
# Settings.instance().set_path(instance.get_settings_path())
def __init__(self, name="", version=""):
# if Application.instance is not None:
# raise Exception("An application instance already exists")
# Application.instance = self
self.stop_flag = False
self.name = name or Application.app_name
self.version = version or Application.app_version
self.__settings = None
self._data_dirs = None
Application.set_instance(self)
def __del__(self):
self.destroy()
def destroy(self):
self.stop()
if self == Application._instance:
Application._instance = None
def set_stop_flag(self):
self.stop_flag = True
def stop(self):
self.set_stop_flag()
def wait(self):
self.wait_for_threads()
@classmethod
def wait_for_threads(cls):
logger.debug("Application.wait_for_threads")
def get_threads():
result = []
for thread in threading.enumerate():
if thread.daemon:
continue
if not thread.is_alive():
continue
result.append(repr(thread))
return result
t_list = get_threads()
logger.debug(repr(t_list))
while len(t_list) > 1:
t_list_2 = get_threads()
if t_list_2 != t_list:
t_list = t_list_2
logger.debug(repr(t_list))
time.sleep(0.1)
def stopping(self):
return self.stop_flag
def run_in_main(self, function, *args, **kwargs):
raise NotImplementedError("Application.run_in_main")
# def timer(self, timeout, function, *args, **kwargs):
# raise NotImplementedError("Application.call_later")
@staticmethod
@memoize
def executable_dir():
return fsboot.executable_dir()
def cache_dir(self):
# FIXME:
return os.path.join(Paths.get_base_dir(), "Cache")
@memoize
def data_dirs(self):
if self._data_dirs is not None:
return self._data_dirs
data_dirs = []
base_dirs = []
if len(sys.argv) > 0:
script_dir = os.path.dirname(sys.argv[0])
base_dirs.append(os.path.join(script_dir, "share"))
data_dirs.append(self.executable_dir())
if windows:
base_dirs.append(os.path.join(self.executable_dir(), "share"))
elif macosx:
base_dirs.append(
os.path.join(self.executable_dir(), "..", "Resources", "share")
)
else:
# FIXME: $XDG_DATA_DIRS, $XDG_DATA_HOME
base_dirs.append(
os.path.normpath(
os.path.join(self.executable_dir(), "..", "share")
)
)
for dir_name in base_dirs:
data_dir = os.path.join(dir_name, self.name)
logger.debug("* checking for data dir %s", data_dir)
if os.path.exists(data_dir):
data_dirs.append(data_dir)
if macosx:
data_dir = os.path.join(self.executable_dir(), "..", "Resources", "Data")
if os.path.exists(data_dir):
data_dirs.append(data_dir)
self._data_dirs = data_dirs
logger.debug("data dirs: %s", repr(data_dirs))
return data_dirs
@memoize
def data_file(self, name):
"""Looks up an application data file in several places depending on
platform.
"""
for data_dir in self.data_dirs():
path = os.path.join(data_dir, name)
# print("- checking", path)
if os.path.exists(path):
return path
raise LookupError(name)
def get_settings_path(self):
logger.warning("Application.get_settings_path not implemented")
@property
def settings(self):
return Settings.instance()
def call_after(func, *args, **kwargs):
return Application.instance().run_in_main(func, *args, **kwargs)
class ApplicationInstanceProxy(object):
def __getattr__(self, name):
return getattr(Application.instance(), name)
def __setattr__(self, name, value):
raise Exception("not currently allowed to set attributes on app")
# return setattr(Application.instance(), name, value)
app = ApplicationInstanceProxy()
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