Method _merge_bindings

src/textual/dom.py:671–695

Merge bindings from base classes. Returns: Merged bindings.

(cls)

    @classmethod
    def _merge_bindings(cls) -> BindingsMap:
        """Merge bindings from base classes.

        Returns:
            Merged bindings.
        """
        bindings: list[BindingsMap] = []

        for base in reversed(cls.__mro__):
            if issubclass(base, DOMNode):
                if not base._inherit_bindings:
                    bindings.clear()
                bindings.append(
                    BindingsMap(
                        base.__dict__.get("BINDINGS", []),
                    )
                )

        keys: dict[str, list[Binding]] = {}
        for bindings_ in bindings:
            for key, key_bindings in bindings_.key_to_bindings.items():
                keys[key] = key_bindings

        new_bindings = BindingsMap.from_keys(keys)
        return new_bindings

    def _post_register(self, app: App) -> None:
        """Called when the widget is registered