D6047: WIP: Support XDG v6

[David Edmundson]

davidedmundson created this revision.
davidedmundson added projects: Plasma on Wayland, Frameworks.
Restricted Application edited projects, added Plasma; removed Plasma on Wayland.

REVISION SUMMARY
  To move forward faster I thought we could start reviewing the davidedmundson/xdgv6 branch for the top level
  whilst I continue the Popup stuff in a new branch.
  
  Commits are made by both me and Marco. 
  He did pings + min/max sizes I did most most the rest.
  
  The main clever part that's not just boring boiler plate is how we handle the structure change
  A surface now has an XDGSurface which then has a an Xdg TopLevel or a Xdg Popup
  
  We need to fit this into the public API which assumes a surface has a Surface or a Popup.
  The old Surface is similar to the new TopLevel.
  
  The shoehorning works by relying on the fact that a surface without a role is pretty useless.
  
  Clients create the surface implicitly with the toplevel or implicitly with the popup.
  The server only announced it has a new "XdgSurface" when it gets a new zxdg_surface_get_toplevel.
  
  Don't write comments about popup code not being implemented...

TEST PLAN
  Current test still passes.

REPOSITORY
  R127 KWayland

BRANCH
  davidedmundson/xdgv6

REVISION DETAIL
  https://phabricator.kde.org/D6047

AFFECTED FILES
  autotests/client/test_xdg_shell_v6.cpp

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