Thiago Macieira wrote:
The only detail is that this extension doesn't exist yet, so the compositor needs to check whether the client acknowledged the message. If it didn't, then the compositor must assume the client is decorating itself.
I think it will be ok for the compositor to assume it worked. In a lot of cases (such as the fullscreen one) there is little it can do to fix things.
In any case I was under the impression that this is being proposed for the new xdg_shell. In that one "fullscreen" and "maximized" have been added to the configure request in the current proposal. I would get rid of these and put in a set of bitflags, which indicate when to turn things off. There would be a flag for each of the 4 edges, and another flag for the "titlebar" (which is the part at the top of a typical window if you remove any top edge above it). It may be necessary to add more flags to turn the "shadow" off independent of the "edges", I am unsure about that.
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