Tricky minimize/maximize/restore things in rootless #1015
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I have compiled your test program. It is working fine locally, it is also working fine in a desktop NX session. In a rootless session that has been started from inside the desktop session the buttons of the testprogram seem to have no effect. However, the window manager controls for minimizing and maximizing are still working. Just to be sure: is this the problem you are describing or is this another problem? I have not checked the source yet. |
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Exactly. It is this problem that is being described. Native wm controls are left for contrast only. |
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Here's another way to reproduce the problem: In the x terminal rootless session try to operate youreself window by xclimsg. |
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Can we simulate your suggested fix with xclimsg? |
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Firstly, the fix is still only my fantasy ;) For example, the maximization case. Simulation done if command Did I answer the question or did not understand it? |
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No, I meant: can you fake a command that will send the event the same way a
fixed nxagent would do? (if fixed like you mentioned in your first post)
e.g running the command on the proxy side with the corresponding proxy side
window ids?
dimbor-ru ***@***.***> schrieb am Fr., 30. Apr. 2021, 21:50:
… Firstly, the fix is still only my fantasy ;)
For example, the maximization case. Simulation done if command xclimsg -m
-w <realx_winid> _NET_WM_STATE 1 _NET_WM_STATE_MAXIMIZED_VERT
_NET_WM_STATE_MAXIMIZED_HORZ starting on client of real x-server. On
nx-session with <nx_winid> of same window command do nothing. These client
messages a filtered by nxagent if xev not lying.
Did I answer the question or did not understand it?
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I am completely confused. !M uses the following terminology and we have the chain: local x server - local proxy (~nxcomp) - remote proxy (~nxagent) - x-client (our program). Code on local side named nx client, on remote side - nx server. I will now assume that "proxy side"==nx server side. Command |
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I use this terminology:
local ("proxy side"): real Xserver <-> nxproxy <-> (from/to nxagent
on the remote side)
remote ("agent side"): (from/to nxproxy on the local side) <-> nxagent
<-> xclient
Now, what I meant: the xclient sends a client message to the nxagent.
It uses window ids only known to the nxagent. nxagent normally
translates these window ids to the window ids that are used by the
corresponding windows on the real xserver. So by running your example
program or xclimsg inside the session you are using inside window ids
that are only known by nxagent. Looking from the nxagent's perspective
lets call them "internal" window ids. IF the nxagent passes them on to
real xserver it first needs to translate the window ids to the ones
used on the real xserver, let's call them "external" window ids.
The assumption is that nxagent will not pass on the client messages it
receives from xclimsg. So what we can try is to run xclimsg on the
real xserver side using the external window ids. Faking the client
message that was not forwarded by nxagent.
nxagent knows some helpful command line switches that can help here:
-nxrealwindowprop
set property NX_REAL_WINDOW for each X11 client inside
nxagent, providing the window XID of the corresponding window object
on the X server that nxagent runs on
-reportwids
explicitly tell nxagent to report its externally exposed
X11 window IDs to the session log (in machine readable form), so that
external parsers can obtain that information from there
-reportprivatewids
explicitly tell nxagent to report X11 window IDs of
internally created window objects to the session log (in machine
readable form), so that external parsers can obtain that information
from there; this creates a lot
of output and may affect performance
…On Sat, May 1, 2021 at 4:59 AM dimbor-ru ***@***.***> wrote:
I am completely confused. !M uses the following terminology and we have the chain: local x server - local proxy (~nxcomp) - remote proxy (~nxagent) - x-client (our program). Code on local side named nx client, on remote side - nx server. I will now assume that "proxy side"==nx server side. Command xclimsg -t <local_root_wid> -w <any_wid> ... cause error now. Error of failed request: BadWindow (invalid Window parameter) local_root_wid not known to remote.
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Ok, after reading your description again I think you have done the right thing from the beginning. I can replicate your result: (:55 is the nxagent's display number, 0x200001 is the internal window id,0xc40004e is the external id) -> nothing happens -> window is maximized |
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While playing around with this I came across this: Your source code calls XInternAtom(..., True). In a fresh rootless session this cannot work as the atoms will be missing if there's no window manager. So you should call XInternAtom() with False. |
Very good!
You're right. I tried to imitate the behavior of proprietary software only. And I can't be sure that there is not written in the same way. Thanks for all items. I will take a timeout for writing a patch. |
Ups! Because of excessive optimism, I confused the direction of the messages. This is normal for me. |
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Yes and no. You can use nxagentLocalToRemoteAtom() to map the atoms and for the window mapping stuff there are lots of nxagentWindow* macros. I have tried to implement this (in ProcSendEvent() yesterday but I failed. It send the message but the WM did not react on it. Hope the best for your approach. |
This should help with clients requesting window manager actions like maximizing or minimizing. This is a first version as it only handles messages of type WM_STATE_CHANGE and _NET_WM_STATE. But ICCCM and EWMH know some more. The other direction, setting of properties by the WM, is already implemented in Rootless.c. Fixes ArcticaProject#1015
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I have done some tests and now have a patch ready, please have a look. |
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Nuts! Everything is working. You have saved a lot of my time. Now I can add handling these messages to nxwin and its pseudo-wm. But in reality, to steal from dad-xwin creatively. |
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I have added client messages handling to nxwin multiwindow mode. There, the code is no longer "academic", but is still used in OpenNX for Windows and in NXClientCE. No problems have been noticed yet. |
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Good to hear that. So what do you think: can my patch be merged or does it
need some refinement?
…On Fri, May 7, 2021 at 12:01 PM dimbor-ru ***@***.***> wrote:
I have added client messages handling to nxwin
<http://git.etersoft.ru/people/dimbor/packages/?p=NXClient-W32.git;a=summary>
multiwindow mode. There, the code is no longer "academic", but is still
used in OpenNX for Windows
<https://unixforum.org/up/nxman/OpenNXCE-1.0.0-r15.6.exe> and in
NXClientCE <https://unixforum.org/up/nxman/NXClientCE-3.5.0-9-r15.6.exe>.
No problems have been noticed yet.
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It feels good. I do not know what to find fault with. Thanks again. |
This should help with clients requesting window manager actions like maximizing or minimizing. This is a first version as it only handles messages of type WM_STATE_CHANGE and _NET_WM_STATE. But ICCCM and EWMH know some more. The other direction, setting of properties by the WM, is already implemented in Rootless.c. Fixes ArcticaProject#1015
This should help with clients requesting window manager actions like maximizing or minimizing. This is a first version as it only handles messages of type WM_STATE_CHANGE and _NET_WM_STATE. But ICCCM and EWMH know some more. The other direction, setting of properties by the WM, is already implemented in Rootless.c. Fixes ArcticaProject#1015
This should help with clients requesting window manager actions like maximizing or minimizing. This is a first version as it only handles messages of type WM_STATE_CHANGE and _NET_WM_STATE. But ICCCM and EWMH know some more. The other direction, setting of properties by the WM, is already implemented in Rootless.c. Fixes ArcticaProject#1015
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I have come across a problem with this patch: I was trying to run xxdiff 50b1 (https://github.com/blais/xxdiff resp. https://furius.ca/xxdiff/) and ended up with a crashing nxagent I looks like pWin is unset in Events.c:4511. |
This happens because pWin is 0x0 in ForwardClientMessage. I can trigger this by running xxdiff 50b1 from https://github.com/blais/xxdiff on Rocky8.9. |
Some programs are now ashamed to use wm and its buttons to perform these operations. They at least continue to use the ICCCM and Extended WM hints specifications. Namely WM_CHANGE_STATE and _NET_WM_STATE client messages sent to root window. Attached are two green buttons to illustrate this "outrageous" behavior. It not worked in rootless on linux nx-client (naturally on nxwin too).
I started exploring ways to solve the problem. Can be forcibly replaced root window in these client messages and deliver them to real wm. The only thing that stops me is that a similar question has already been discussed here: #830
I don't want to break something globally with my future patches and I want to hear your opinions.
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