Bug 275148 – [GTK] MouseEvent movementX/Y incorrect with USE_GTK4=OFF

• Component: WebKitGTK
• Status: RESOLVED FIXED

[Roope Salmi]

Created attachment 471586 [details]
HTML demonstrating the issue

Ubuntu 22.04.4

Either:
- WebKitGTK 2.44.0-0ubuntu0.22.04.1
- Local build @ webkitgtk-2.45.2 with -DUSE_GTK4=OFF

This HTML (attached), opened in MiniBrowser or Epiphany:

<script>
    document.addEventListener("mousemove", (e) => {
        document.body.innerText = `${e.screenX} ${e.screenY} ${e.movementX} ${e.movementY}`;
    });
</script>

always shows the same values for screenX & movementX, as well as screenY & movementY respectively. E.g.:

464 291 464 291
491 200 491 200
1152 556 1152 556

movementX/Y should be delta values from the previous event to the current one, but instead
they are the same absolute values as screenX/Y.

Works correctly when compiled with -DUSE_GTK4=ON.

[Carlos Garcia Campos]

Pull request: https://github.com/WebKit/WebKit/pull/29892

[EWS]

Committed 280110@main (763d3dd18daf): <https://commits.webkit.org/280110@main>

Reviewed commits have been landed. Closing PR #29892 and removing active labels.