ui.py 文件源码

def _treat_unused_bl_classes():
    """Treat (rewire or unregister) unused Blender bpy.types"""
    for bt_name in dir(bpy.types):
        # Init
        bt_cls = getattr(bpy.types, bt_name, None)
        bt_bl_space_type = getattr(bt_cls, "bl_space_type", None)
        # Surely used bts
        if bt_bl_space_type in _used_bl_space_type: continue
        # Other Headers and Panels
        # Panels
        if issubclass(bt_cls, Panel):
            if bt_name in _used_panels: continue
            if bt_name not in _unused_panels and bt_bl_space_type in _used_panel_by_bl_space_type:
                bt_bl_category = getattr(bt_cls, "bl_category", None)
                if bt_bl_category and bt_bl_category in _used_panel_by_bl_category: continue
                bt_bl_region_type = getattr(bt_cls, "bl_region_type", None)
                if bt_bl_region_type and bt_bl_region_type in _used_panel_by_bl_region_type: continue
            # If nothing else applies, unregister the Panel
            if DEBUG: print("BFDS: Unregister Panel:", bt_name)
            bpy.utils.unregister_class(bt_cls)
            continue
        # Headers
        if issubclass(bt_cls, Header):
            if bt_name in _used_headers: continue
            if DEBUG: print("BFDS: Rewire Header:", bt_name)
            bt_cls.draw = _unused_header_draw # Unused header, rewire its draw function
            continue