Bug 126337 – Implement `CSS.escape` as per CSSOM

• Component: CSS
• Status: RESOLVED FIXED

[Mathias Bynens]

Spec: http://dev.w3.org/csswg/cssom/#the-css.escape%28%29-method
Polyfill: http://mths.be/cssescape
Tests: https://github.com/mathiasbynens/CSS.escape/blob/master/tests/tests.js

[Mathias Bynens]

FWIW, this recently landed in Chromium.

[Nikita Vasilyev]

*** Bug 149175 has been marked as a duplicate of this bug. ***

[Joseph Pecoraro]

We are considering using the polyfill in Web Inspector at the moment on bug 151378.

[Joseph Pecoraro]

The Blink commit that included this looks quite small. It would probably be trivial to port it over to WebKit:
<https://chromium.googlesource.com/chromium/blink/+/c1a5ffdc924b089e70cd33ad2726b58cc8312abe%5E!/>

[Mathias Bynens]

(In reply to comment #4)
> The Blink commit that included this looks quite small. It would probably be
> trivial to port it over to WebKit:
> <https://chromium.googlesource.com/chromium/blink/+/
> c1a5ffdc924b089e70cd33ad2726b58cc8312abe%5E!/>

Keep in mind that various follow-up fixes were committed separately, so be sure to base any ports on the latest code in Blink rather than that individual commit.

[Joseph Pecoraro]

I'll take this.

[Joseph Pecoraro]

Created attachment 286768 [details]
[PATCH] Proposed Fix

[Joseph Pecoraro]

Comment on attachment 286768 [details]
[PATCH] Proposed Fix

View in context: https://bugs.webkit.org/attachment.cgi?id=286768&action=review

> Source/WebCore/ChangeLog:14
> +        (WebCore::serializeIdentifier):
> +        Update serialization to match the latest version of the spec:
> +        <https://drafts.csswg.org/cssom/#serialize-an-identifier>
> +        New handling for 0x0, 0x7f, just "-", and "--" is now allowed.

Note: WebCore::serializeString can use the same handling updates for 0x0 and 0x7f but I was unsure how to test those.

[WebKit Commit Bot]

Comment on attachment 286768 [details]
[PATCH] Proposed Fix

Clearing flags on attachment: 286768

Committed r204952: <http://trac.webkit.org/changeset/204952>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Darin Adler]

Comment on attachment 286768 [details]
[PATCH] Proposed Fix

The characterStartingAt plus U16_LENGTH idiom is ugly. I suggest we use StringView::codePoints instead.

[Darin Adler]

In some other tests like this I changed the tests so we could see non-trivial characters in hex. This made it easier to see the tests were correct for unusual characters.