1880594 - `touchend` does not cause mouse events if synthesized without APZ (test.events.async.enabled=false)

Status: RESOLVED FIXED

(Core :: DOM: UI Events & Focus Handling, defect)

Description

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

Currently, mouse events for compatibility are not fired if a touch is synthesized without APZ because they are dispatched by APZCCallbackHelper, and it's currently default. Therefore, touch tests for pointer events do not work. PresShell::EventHandler should have a fallback path for it.

Comment 1

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

Attachment: Bug 1880594 - Make `PresShell::EventHandler` dispatch mouse events as a default action of `eTouchEnd` if it's dispatched without APZ r=smaug!,#dom-core

The mouse events for eTouchEnd is currently dispatched by
APZCCallbackHelper [1] and currently we don't support async event dispatching
in WPT (bug 1773393). Therefore, tests of Pointer Events for touch won't work.
This blocks our further work to improve Pointer Events. Therefore,
PresShell::EventHandler should have a fallback path for it.

1. https://searchfox.org/mozilla-central/rev/a7809ff8b0a6d98e6df3183d3ca99c77ef2f983e/gfx/layers/apz/util/APZCCallbackHelper.cpp#553,562-567

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/555336283b32
Make `PresShell::EventHandler` dispatch mouse events as a default action of `eTouchEnd` if it's dispatched without APZ r=smaug

Comment 3

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Created web-platform-tests PR https://github.com/web-platform-tests/wpt/pull/44802 for changes under testing/web-platform/tests

Comment 4

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

https://hg.mozilla.org/mozilla-central/rev/555336283b32

Comment 5

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Upstream PR merged by moz-wptsync-bot