Cleanup code - purge use of "::screen" global

[Alan Griffiths]

Classes that need to refer to CompScreen should be provided a pointer via their constructor and keep it.

[Daniel van Vugt (vanvugt)]

I thought about this too. However my experience with plugin code tells me that too many plugins need fixing. And that's a risky long-term task.

[Alan Griffiths (alan-griffiths)]

Agree it isn't short term. First step would be to put mechanisms in place and remove the use in compiz-core (without removing the global). That by itself removes some of the painful coupling that hinders the current drive to get code under test.

Once core is clean, the plugins can be updated and only then remove the global entirely.