Bug 214865 – [WPE] Make Touchpoint ID unique

• Component: WPE WebKit
• Status: RESOLVED FIXED

[Marco Felsch]

[WPE] Make Touchpoint ID unique

[Marco Felsch]

Created attachment 405347 [details]
Patch

[Zan Dobersek]

Comment on attachment 405347 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=405347&action=review

> Source/WebKit/ChangeLog:13
> +        The web uses a unique touch point id. A few touch controllers reporting
> +        a unique ID by ABS_MT_TRACKING_ID [1] but libinput and the wayland-protocol
> +        don't take this information into account. Fix this within webkit to be
> +        independent of libinput, the wayland-protocol and a wayland-compositor.

Can you please elaborate in more detail what failures in the libinput/wayland infrastructure this change tries to work around?

[Marco Felsch]

Comment on attachment 405347 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=405347&action=review

>> Source/WebKit/ChangeLog:13
>> +        independent of libinput, the wayland-protocol and a wayland-compositor.
> 
> Can you please elaborate in more detail what failures in the libinput/wayland infrastructure this change tries to work around?

As I wrote a few input event devices delivering a unique ID but this gets ignored by libinput and isn't covered by the wayland-protocol at all.
Currently we are using the non unique touchpoint number to fill the web.touchpointID event. This is forbidden by the Spec if I got it correctly.
You can see the different behavior if you call your test page: https://people.igalia.com/clopez/wkbug/pointer-events/test.html on an iOS-Port Safari browser or on an WPE-Port cog (embedded device with touch is required).

[Marco Felsch]

Ping

[Bastian Krause]

Updated version of the patch: https://github.com/WebKit/WebKit/pull/9599

[EWS]

Committed 263237@main (057b735cbf91): <https://commits.webkit.org/263237@main>

Reviewed commits have been landed. Closing PR #9599 and removing active labels.