Needs many workarounds for the never ending API deprecation in GTK3. Many API calls now fail or return nothing: no default screen, no root window, etc. No x11 gl code, no x11 clipboard, no keyboard layout, etc
We should be able to at least run the client without xwayland:
DISPLAY="" GDK_BACKEND=wayland /usr/bin/python3 /usr/bin/xpra attach tcp://localhost:10000/
get_mouse_position: make sure the server will ignore this
(-1, -1)position if we can't get a real value
get_current_modifiers: as above - #1942 may help
get_root_size: query all monitors? Add them up? (we can still get monitors from the default display, example: https://askubuntu.com/a/1104252/14126)
I gave this a try running in Weston v5.0.0 and xpra v3.0-r23019 on Debian buster.
I found one issue with the xpra server: It fails if started with GDK_BACKEND=wayland. It must be started with GKD_BACKEND=x11 (or unset) instead.
The xpra client needs GDK_BACKEND=wayland as noted above. It starts up, but does not show a client window. The log shows an error, but the client does not terminate. The server looks like it gets a valid connection:
==> /home/lauscher/.cache/x11docker/xterm-9065ed/xpraclient.log <== 2019-06-30 14:01:04,176 Xpra GTK3 client version 3.0-r23019 64-bit 2019-06-30 14:01:04,178 running on Linux Debian 10 buster 2019-06-30 14:01:04,178 window manager is 'wayland' 2019-06-30 14:01:04,530 Error: failed to load posix keyboard bindings 2019-06-30 14:01:04,530 cannot load X11 bindings with wayland under python3 / GTK3 2019-06-30 14:01:04,564 keyboard bindings are not available, expect keyboard mapping problems 2019-06-30 14:01:04,568 OpenGL safety warning (enabled at your own risk): 2019-06-30 14:01:04,569 disabled under wayland with GTK3 (buggy) 2019-06-30 14:01:04,655 No OpenGL_accelerate module loaded: No module named 'OpenGL_accelerate' 2019-06-30 14:01:05,063 Error loading OpenGL support: 2019-06-30 14:01:05,063 no X11 display registered 2019-06-30 14:01:05,117 using default keyboard settings 2019-06-30 14:01:05,123 desktop size is 1824x984 with 1 screen: 2019-06-30 14:01:05,123 wayland-102 (482x259 mm - DPI: 96x96) 2019-06-30 14:01:05,124 weston-X11 none 2019-06-30 14:01:05,126 failed to get antialias info from xsettings: 'NoneType' object is not callable 2019-06-30 14:01:05,136 error preparing connection: 'NoneType' object is not callable Traceback (most recent call last): File "/usr/lib/python3/dist-packages/xpra/client/client_base.py", line 336, in send_hello hello.update(self.make_hello()) File "/usr/lib/python3/dist-packages/xpra/client/gtk_base/gtk_client_base.py", line 673, in make_hello capabilities = UIXpraClient.make_hello(self) File "/usr/lib/python3/dist-packages/xpra/client/ui_client_base.py", line 361, in make_hello caps.update(c.get_caps(self)) File "/usr/lib/python3/dist-packages/xpra/client/mixins/window_manager.py", line 271, in get_caps "double_click.time" : get_double_click_time(), File "/usr/lib/python3/dist-packages/xpra/platform/xposix/gui.py", line 400, in get_double_click_time return _get_xsettings_int("Net/DoubleClickTime", -1) File "/usr/lib/python3/dist-packages/xpra/platform/xposix/gui.py", line 390, in _get_xsettings_int d = _get_xsettings_dict() File "/usr/lib/python3/dist-packages/xpra/platform/xposix/gui.py", line 152, in _get_xsettings_dict v = _get_xsettings() File "/usr/lib/python3/dist-packages/xpra/platform/xposix/gui.py", line 136, in _get_xsettings X11Window = X11WindowBindings() TypeError: 'NoneType' object is not callable
==> /home/lauscher/.cache/x11docker/xterm-9065ed/xpraserver.log <== 2019-06-30 14:01:05,556 watching for applications menu changes in: 2019-06-30 14:01:05,556 '/usr/share/xfce4/applications' 2019-06-30 14:01:05,556 '/usr/local/share/applications' 2019-06-30 14:01:05,556 '/usr/share/applications' 2019-06-30 14:01:05,557 '/usr/share/applications' 2019-06-30 14:01:05,557 6.5GB of system memory 2019-06-30 14:01:06,099 New unix-domain connection received on /home/lauscher/.cache/x11docker/xterm-9065ed/buster-104 2019-06-30 14:01:06,177 New unix-domain connection received on /home/lauscher/.cache/x11docker/xterm-9065ed/buster-104
get the keymap from somewhere
/etc/default/keyboard might help.
2019-06-30 14:01:05,126 failed to get antialias info from xsettings: 'NoneType' object is not callable
Thanks for pointing that out, fixed in r23057.
get the keymap from somewhere
That's a Debian thing, it doesn't exist on other distros.. As for wayland, there is no "standard" way of doing this that I can find. Looks like every compositor is going to have its own way of configuring things: Does Wayland use XKB for keyboard layouts?: But Wayland does not define how this keymap is decided on. This decision is up to the compositor.
Note: if we cannot support the native Wayland client well enough before the 3.0 release then we will have to force it to switch to the X11 backend.
There is SirCmpwn, a developer of wlroots and Wayland compositor sway. I believe he likes to help others in Wayland development. It might be worth to contact him for questions like keyboard layouts.
Looks like every compositor is going to have its own way of configuring things
There is some work done to develop an additional standard that includes more than the core Wayland protocol, the xdg_shell interface. That might help.
I accidently found that the xpra client fails with "Cannot open display" even on x11 if
GDK_BACKEND is set but empty.
To avoid this you could unset
GDK_BACKEND if it is empty.
I'd like to test xpra Wayland client in a fedora VM. I get the slightly outdated version xpra v3.0-r23019 from winswitch beta repository with the bug mentioned in comment 3. Could you please push an update for fedora?
I've encountered issues on Debian buster with outdated Weston 5.0.0 (window decoration mismatches window content). I think it makes sense to test with more recent versions of Weston before reporting bugs here, so I want to try in a fedora 30 VM.
we have to use a drawing area to get the correct coordinates
This is as good as it is going to get for this release.
To test from an X11 desktop, run
weston then from a terminal:
GDK_BACKEND=wayland python3 /usr/bin/xpra attach
Things that are just not supported in this release: clipboard, keyboard layout, etc That's why the default remains the X11 backend.
Will follow up in #2368
We detect the keyboard layout using
localectl status as of r23321 - which is better than nothing.
As for the clipboard, we removed the GTK clipboard in #812... And that was a lot of work. Re-adding something like it would allow some sort of clipboard synchronization with wayland clients, but the big problem here is that there is no notification change support on wayland, so this would not work well at all. (removing things without providing a replacement is an improvement / feature apparently)
r23305 broke non-opengl GTK2 rendering: #2377
Missed from the refactoring: r23429.
I can confirm that xpra client on Wayland works well on Weston v5.0.0 and kwin_wayland 5.14.5. The window content now fits into the window border and the keyboard matches the system setting.
Tested on Debian bullseye with xpra v3.0-r23522
Wayland, at least when testing via Weston, is afflicted by a GTK3 CSD geometry bug: #2475 / #2457.
this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/2243