• Martin Flöser's avatar
    Announce output changes to Wayland for platforms not handling outputs · d0c488f4
    Martin Flöser authored
    Summary:
    Most platforms like the nested and virtual do not handle the outputs
    themselves and WaylandServer announces the Outputs to Wayland.
    
    So far this was static: at startup it got announced once to Wayland
    and any changes were not catched.
    
    This change makes WaylandServer listen to changes to the Screens and
    sync them to Wayland.
    
    Unfortunately KWin's internal Screen information is not sufficient to
    properly synchronize this to Wayland and also Wayland by not supporting
    adding/removing modes does not help.
    
    Thus the solution implemented here is to add new outputs reflecting the
    changes and then removing the old ones. This creates situations with more
    outputs being present than actually there, but prevents that there are
    no outputs at all.
    
    Test Plan: Auto test added which verifies this for the virtual platform
    
    Reviewers: #kwin, #plasma_on_wayland
    
    Subscribers: plasma-devel, kwin
    
    Tags: #plasma_on_wayland, #kwin
    
    Differential Revision: https://phabricator.kde.org/D2233
    d0c488f4
wayland_server.cpp 21.1 KB