Emil Velikov authored Dec 26, 2019 and Emil Velikov committed Mar 07, 2021

The unstable wl_shell protocol has gone through number of revisions and
has been promoted as stable/xdg-shell. The old protocol is deprecated.

Add support for the new protocol alongside the existing wl_shell. This
way things will just work, for compositors supporting either and/or
both.

Initial patch from Scott Moreau and Simon Zen, with a handful of fixes
from your truly:

- Keep wl_shell alongside xdg-shell.
- Require wayland-protocols v1.12 - introduces xdg-shell
- Remove protocol hack/patching
- Coding style improvements and #include fixes
- Don't fetch symbols from libwayland-server
- cmake: Wire up the build
- meson: Keep meson_version as-is
- meson: Keep wayland-client dependency handling as-is
- meson: Ensure wayland autodetection works
- meson: Move generators into src/waffle/meson.build

v2:
- Add wayland-protocols to the CI, bump the CI tag

v3:
- meson: evaluate wayland deps, only when found

v4:
- use pkg-config variables for xml location
- rebase on top of -fno-common changes
- preserve wl_shell API
- split build specifics in prep patch
- document the old/new shell/surfaces

Co-developed-by: Scott Moreau <oreaus@gmail.com>
Co-developed-by: Simon Zeni <simon@bl4ckb0ne.ca>
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>