1791375 - [resize-observer] Support multiple fragments in ResizeObserver

Status: RESOLVED FIXED

(Core :: Layout, enhancement)

Description

[Oriol Brufau [:Oriol]]

In https://github.com/w3c/csswg-drafts/issues/3673#issuecomment-467221565 the CSSWG resolved that ResizeObserver should expose an array of fragment sizes.

Right now the arrays always has a single size.

Let's just populate it behind a pref.

Comment 1

[Oriol Brufau [:Oriol]]

Attachment: Bug 1791375 - Switch ResizeObserver APIs from gfx::Size to LogicalPixelSize. r?emilio

This is in preparation of supporting multiple fragments, since we want
to track the logical sizes, and fragments might potentially have
different writing modes (but not sure if it can happen in practice).

This patch should have no observable effect.

Depends on D157633

Comment 2

[Oriol Brufau [:Oriol]]

Attachment: Bug 1791375 - Switch ResizeObserver APIs to using an array of sizes. r?emilio

This is in preparation of supporting multiple fragments, since we should
track each fragment size separately.

This patch should have no observable effect.

Depends on D157639

Comment 3

[Oriol Brufau [:Oriol]]

Attachment: Bug 1791375 - Handle multiple fragments in ResizeObserver. r?emilio

As per CSSWG resolution: https://github.com/w3c/csswg-drafts/issues/3673

Some details are not clear, so implement it behind a pref, disabled by
default.

Depends on D157640

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/b6566510caed
Switch ResizeObserver APIs from gfx::Size to LogicalPixelSize. r=emilio
https://hg.mozilla.org/integration/autoland/rev/2ffdf43d7cbb
Switch ResizeObserver APIs to using an array of sizes. r=emilio
https://hg.mozilla.org/integration/autoland/rev/05ef9b63051c
Handle multiple fragments in ResizeObserver. r=emilio

Comment 5

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

Created web-platform-tests PR https://github.com/web-platform-tests/wpt/pull/36000 for changes under testing/web-platform/tests

Comment 6

[Marian-Vasile Laza]

https://hg.mozilla.org/mozilla-central/rev/b6566510caed
https://hg.mozilla.org/mozilla-central/rev/2ffdf43d7cbb
https://hg.mozilla.org/mozilla-central/rev/05ef9b63051c

Comment 7

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

Upstream PR merged by moz-wptsync-bot