Bug 263640

Summary:	WebVTT Parser should treat negative percentages as invalid values
Product:	WebKit	Reporter:	Kueno <kohei.ueno119>
Component:	Media	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Kueno 2023-10-25 01:57:14 PDT

According to the WebVTT specification, percentage values must be in the range of 0 to 100, and negative percentages are not valid. https://www.w3.org/TR/webvtt1/#webvtt-percentage

The following WPTs are failing due to this issue:
https://wpt.fyi/results/webvtt/parsing/file-parsing/tests/regions-regionanchor.html?label=experimental&label=master&aligned
https://wpt.fyi/results/webvtt/parsing/file-parsing/tests/regions-viewportanchor.html?label=experimental&label=master&aligned

Comment 1 Kueno 2023-10-25 01:58:03 PDT

Pull request: https://github.com/WebKit/WebKit/pull/19527

Comment 2 EWS 2023-10-27 20:38:15 PDT

Committed 269882@main (6c997a688fcd): <https://commits.webkit.org/269882@main>

Reviewed commits have been landed. Closing PR #19527 and removing active labels.

Comment 3 Radar WebKit Bug Importer 2023-10-27 20:39:12 PDT

<rdar://problem/117615681>