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Use weakref for config.on_change. Fixes #156.

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This commit is contained in:
Florian Bruhin 2014-10-08 10:40:46 +02:00
parent 7956f2b8e2
commit b7f2a6d143
1 changed files with 18 additions and 10 deletions
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28
qutebrowser/config/config.py
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@ -29,6 +29,7 @@ import sys
import os.path
import inspect
import functools
import weakref
import configparser
import collections
import collections.abc
@ -43,8 +44,8 @@ from qutebrowser.utils import message, objreg, utils, standarddir, log
from qutebrowser.utils.usertypes import Completion
ChangeHandler = collections.namedtuple('ChangeHandler', ['func', 'section',
'option'])
ChangeHandler = collections.namedtuple(
'ChangeHandler', ['func_ref', 'section', 'option'])
change_handlers = []
@ -67,7 +68,7 @@ def on_change(func, sectname=None, optname=None):
if optname is not None and optname not in configdata.DATA[sectname]:
raise NoOptionError("Option '{}' does not exist in section "
"'{}'!".format(optname, sectname))
change_handlers.append(ChangeHandler(func, sectname, optname))
change_handlers.append(ChangeHandler(weakref.ref(func), sectname, optname))
def get(*args, **kwargs):
@ -315,21 +316,28 @@ class ConfigManager(QObject):
sectname, optname))
if sectname in ('colors', 'fonts'):
self.style_changed.emit(sectname, optname)
to_delete = []
for handler in change_handlers:
if handler.section is not None and handler.section != sectname:
func = handler.func_ref()
if func is None:
to_delete.append(handler)
continue
if handler.option is not None and handler.option != optname:
elif handler.section is not None and handler.section != sectname:
continue
param_count = len(inspect.signature(handler.func).parameters)
elif handler.option is not None and handler.option != optname:
continue
param_count = len(inspect.signature(func).parameters)
if param_count == 2:
handler.func(sectname, optname)
func(sectname, optname)
elif param_count == 1:
handler.func(sectname)
func(sectname)
elif param_count == 0:
handler.func()
func()
else:
raise TypeError("Handler {} has invalid signature.".format(
handler.func.__qualname__))
func.__qualname__))
for handler in to_delete:
change_handlers.remove(handler)
def _after_set(self, changed_sect, changed_opt):
"""Clean up caches and emit signals after an option has been set."""