forked from amazingfate/loongoffice
This is similar to the existing LOK callback, the difference is that the existing one assumes there is only one SfxViewShell instance at the same time. This newer callback is precisely per-view, so model notifications can invoke all view callbacks, while view notifications can invoke only the callback of the relevant view. This is just the framework, all actual client code has to be still ported over (and then the existing callback can be removed). Change-Id: I3d8f27740c69fcf6ffbbdce12db2ea088321493d