fix: sync vendored xf86-input-neko scroll support - #23
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The vendored driver here has no scroll support: a NEKO_SCROLL (0x80) message falls through to xf86PostTouchEvent. The copy that kernel-images builds and ships registers XI2 scroll valuators for it, and Dockerfile.tmpl builds this copy into the base image, so a standalone base-image deployment with the driver enabled gets a driver that cannot scroll. Take src/neko.c verbatim from kernel-images at 18e75774 (kernel-images PR m1k1o#196): scroll valuators 3 and 4 registered with SCROLL_INCREMENT 120, NEKO_SCROLL posted through xf86PostMotionEventM, the touch class held at its three axes, and the device announced as XI_MOUSE rather than XI_TOUCHSCREEN so Chromium honours the scroll valuators. Document the message and the unit in the README. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
…Xorg Preserve the kernel-images driver source while testing its XI2 scroll and touch protocol on Debian bullseye and bookworm.
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Related to #17 (the vendored driver part).
What changed
Sync
utils/xorg-deps/xf86-input-neko/src/neko.cwith the scroll-capable driver from kernel-images #196, pinned to 18e75774. The driver source is byte-for-byte identical.This handles NEKO_SCROLL (0x80), registers relative vertical/horizontal scroll valuators with a 120-unit increment, and keeps touch events on their original three axes. The README documents the wire message.
Verification
Bullseye CI uses Debian's signed final-LTS snapshot because the regular security package URLs currently return 404s. The tests document inherited limitations around idle-server wakeups, fragmented socket messages, modifier ordering, and thread lifecycle. A complete application/base image and Chromium rendering test were not run.
The XTest fallback conversion discussed in #17 is a separate patch. This PR deliberately does not close the multi-part issue.