[FEAT] Render remote server cursor in gaming mode (fullscreen pointer lock)

[ehfd]

Is this a new feature request?

• I have searched the existing issues

Wanted change

Current approach: absolute position of cursor is recorded and sent to the X11 server.
Issue: applications only using relative cursors receive absolute cursor positions and lead to rapid mouse movement.

New approach: Use an option like KasmVNC's game cursor mode and relative cursor mode to send relative position of cursor instead of absolute position.

Reason for change

Improve compatibility between various applications.

Proposed code change

Previous code in legacy Selkies:

selkies-project/selkies#97
selkies-project/selkies#142

[thelamer]

there is gaming mode in the sidebar that does exactly this, fullscreen plus pointerlock api.

[ehfd]

@thelamer OK, so I have checked with the latest chromium container.

First issue: relative cursor with Ctrl+Shift+LtClk without fullscreen is available, but the visible cursor is static while there is an invisible relative cursor that acts on its own.

Second issue: I am unable to figure out how there is gaming mode in the sidebar that does exactly this works, yet.

[thelamer]

If you are using a touch device for obvious reasons we swap the icon with the trackpad mode.

[ehfd]

If you are using a touch device for obvious reasons we swap the icon with the trackpad mode. This is a similar issue with the show keyboard option; it has to detect the keyboard and choose priorities.

1. There are devices with keyboards/trackpads + touch screens.
2. If so, the local cursor is supposed to disappear and remote cursor is supposed to appear. The local cursor keeps in appeared state (but doesn't move), and the invisible remote cursor is what works.

[thelamer]

I agree that we should render the local cursor when we activate this mode especially because we have all the logic and switches for it already (trackpad mode uses this)

I do not agree fully with the need for this mode to be accessible on a device where the user has physically touched the screen. The touch mode flags all only get activated (softkeys softkeyboard trackpad mode) if the user physically touches the screen.

The situation where someone with a touch laptop lands on this and touches their screen for some reason while having a mouse and keyboard plugged in to play first person shooters seems so miniscule is does not seem worth supporting.