Bug 212341 – open-quote / close-quote content doesn’t fallback to language when region not understood

• Component: Layout and Rendering
• Status: NEW

[Robin Whittleton]

Created attachment 400187 [details]
Quote testcase

Webkit attempts to provide automatic quote styles, based on quotesDataLanguageMap (https://trac.webkit.org/browser/webkit/trunk/Source/WebCore/rendering/RenderQuote.cpp?rev=125476#L55 / https://html.spec.whatwg.org/multipage/rendering.html#quotes). This works for the specific languages in the map, but fails when a language-region pair is found that isn’t in the map.

For example (and see the testcase), if you have <q lang="de"> then correct German quotes will be applied, but if you have <q lang="de-AT"> then it just uses straight typographical quotes. <q lang="de-DE"> also fails.

In the case of an unknown region, the quotes displayed should be based on the fallback root language. As I understand it, this is specified in the WhatWG spec by the sentence “The quotes are derived from the delimiter blocks, with fallback handled as specified in the CLDR documentation.”.

This is also a problem in Chromium, but works as expected in Firefox.

[Robin Whittleton]

Chromium bug for the same issue: https://bugs.chromium.org/p/chromium/issues/detail?id=1086115

[Radar WebKit Bug Importer]

<rdar://problem/63603756>

[Robin Whittleton]

Reported as fixed in Chrome, to appear in production in 85.

[Ahmad Saleem]

Blink Commit: https://chromium.googlesource.com/chromium/src.git/+/ef734f74199250e3a40e74884036485fc7fa35f0