Ichthyostega
aecef2a8f4
It seems more adequate to push the somewhat intricate mechanics for the "fall back" onto generic commands down into the implementation level of CommandInstanceManager. The point is, we know the standard usage situation is to rely on the instance manager, and thus we want to avoid redundant table lookups, only to support the rare case of fallback to global commands. The latter is currently used only from unit-tests, but might in future also be used by scripts. Due to thread safety considerations, I have refrained from handing out a direct reference to the command token sitting in the registry, even while not doing so incurs a small runtime penalty (accessing the shared ref-count for creating a copy of the smart-handle). This is the typical situation where you'd be tempted to sacrifice sanity for the sake of an imaginary performance benefit, which in fact is dwarfed by all the machinery of UI-Bus and argument passing via GenNode. |
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