D6727: Destroy all kwayland objects created by registry when it is destroyed

[David Edmundson]

davidedmundson created this revision.
Restricted Application added subscribers: Frameworks, plasma-devel.
Restricted Application added projects: Plasma on Wayland, Frameworks.

REVISION SUMMARY
  Currently one has to connect every object manually to connectionDied,
  which is something we can do for them.
  
  If the user also has a connection, the second will just no-op.
  
  Will add some awesome docs / unit tests if you're into the idea.

TEST PLAN
  Commit 2:
  Emit connectionDied if the QPA owns the connection and is destroyed.
  
  We have a few objects that linger longer than the qApp. 
  I've got a crash in plasmashell, and I've had a crash with breeze wrapping
  a dangly menu in konversation. This should fix those.

REPOSITORY
  R127 KWayland

BRANCH
  davidedmundson/xdgv6

REVISION DETAIL
  https://phabricator.kde.org/D6727

AFFECTED FILES
  src/client/connection_thread.cpp
  src/client/output.cpp
  src/client/output.h
  src/client/outputdevice.cpp
  src/client/outputdevice.h
  src/client/registry.cpp
  src/client/registry.h

To: davidedmundson
Cc: plasma-devel, #frameworks, ZrenBot, progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, eliasp, sebas, apol, mart, hein, lukas
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