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Copy pathpatches_here.py
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50 lines (40 loc) · 1.69 KB
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"""Monkey patching Kivy @('_')@."""
import kivy.uix.widget
from kivy.factory import Factory
from kivy.lang.builder import BuilderBase
_original_factory_register = Factory.register
_original_builderbase_match = BuilderBase.match
# pylint: disable=protected-access
_original_widget_destructor = kivy.uix.widget._widget_destructor
def _patched_factory_register(classname, *args, **kwargs):
"""Register a new classname, even if it was already registered."""
if classname in Factory.classes:
Factory.classes.pop(classname)
return _original_factory_register(classname, *args, **kwargs)
def _patched_builderbase_match(self, widget):
"""Return a list of rules matching the widget,
with no duplicates for rules created with the `%there kv`.
"""
rules = _original_builderbase_match(self, widget)
pythonhere_rules = {
rule.name: rule for rule in rules if (rule.ctx.filename or "").isdigit()
}
if pythonhere_rules:
rules = [
rule for rule in rules if not (rule.ctx.filename or "").isdigit()
] + list(pythonhere_rules.values())
return rules
def _patched_widget_destructor(*args, **kwargs):
"""Internal method called when a widget is deleted from memory.
Call the original method, and ignore KeyError
when uid is not found in `_widget_destructors`.
"""
try:
return _original_widget_destructor(*args, **kwargs)
except KeyError:
pass
def monkeypatch_kivy():
"""Apply patches to Kivy classes."""
Factory.register = _patched_factory_register # pylint: disable=assigning-non-slot
BuilderBase.match = _patched_builderbase_match
kivy.uix.widget._widget_destructor = _patched_widget_destructor