1638583 - [wpt-sync] Sync PR 23657 - Fix missing borders on narrow elements

Status: RESOLVED FIXED

(Core :: CSS Parsing and Computation, task, P4)

Description

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

Sync web-platform-tests PR 23657 into mozilla-central (this bug is closed when the sync is complete).

PR: https://github.com/web-platform-tests/wpt/pull/23657
Details from upstream follow.

Stephen Chenney <[e-mail]> wrote:

Fix missing borders on narrow elements

A recent change for painting narrow elements whose widths falls below 0.5
under zoom has caused problems when such elements have a single pixel border.
In such cases, the element size, including the border, is greater than
1 and snaps normally, but the inner border rect has non zero size below
0.5 and snaps up to size 1, instead of zero. As a result the inner border
rects is the same as the out border rect and the border is clipped out.

Here we change the rounding for inner border rect to not enforce the
non-zero-width constraint, as it is inappropriate in this case.

Bug: 1070091
Change-Id: Ia368ca00375fe5d8a060b88c2d9e314f25679b07
Reviewed-on: https://chromium-review.googlesource.com/2204362
WPT-Export-Revision: ed39981d4af747ed5c4a770f90bdc90dd43c1bb2

Comment 1

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

Pushed to try (stability) https://treeherder.mozilla.org/#/jobs?repo=try&revision=d2c8a2c3e85fd9f1c545f7e40414d792cb50864d

Comment 2

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

CI Results

Ran 12 Firefox configurations based on mozilla-central, and Firefox, Chrome, and Safari on GitHub CI

Total 1 tests

Status Summary

Firefox

PASS: 1

Chrome

FAIL: 1

Safari

PASS: 1

Links

Gecko CI (Treeherder)
GitHub PR Head
GitHub PR Base

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/b40e6d32a17f
[wpt PR 23657] - Fix missing borders on narrow elements, a=testonly

Comment 4

[Andreea Pavel [:apavel]]

https://hg.mozilla.org/mozilla-central/rev/b40e6d32a17f