selecting objects in hierarchy without menu

In outliner...

• click a collection : active the collection

• double-click a collection : active the collection and select the objects in the collection

• shift + double-click a collection : add objects in the collection to selection

• ctrl + double-click the collection : subtract objects in the collection from selection

• click parent object : select object

• double-click a parent object : select the parent and children

• shift + double-click a parent object : add the parent and it's children to selection

• ctrl + double-click a parent object : subtract the parent and it's children from ​selection

• double-click objects with number after the parent :select objects wiout their paren

• press uparrow key :select selected object's parent

• hold shift and press uparrow key :add selected object's parent to selection

I just feel selection rule needs to be unified, I have not thought well yet.