Bug 31224 – [V8] Return StyleSheet object instead of HTMLStyleElement w/document.styleSheets named property getter.

• Status: RESOLVED
• Resolution: FIXED
• Component: WebCore JavaScript

[johnnyding]

In page http://soren.qzone.qq.com/cgi-bin/soren/cgi_userinfo_search?bSimple=0&ptlang=2052, it uses document.styleSheets["CssId"].rules to get style css rule list.

In safari, the page run well, but in Google Chrome, accessing document.styleSheets["CssId"].rules got "undefined".

After investigation, Safari returns a [CSSStyleSheet] object when accessing document.styleSheets["CssId"], so the "rules" can be gotten. Chrome returns a [HTMLStyleElement] object when accessing document.styleSheets["CssId"], so the "rules" can not be gotten.

I believe it's v8 binding's fault. See JS binding (JSStyleSheetListCustom.cpp, line 60), it returns stylesheet instead of returning style element.

[johnnyding]

Created attachment 42694 [details]
patch to fix this issue.

[Dimitri Glazkov (Google)]

Comment on attachment 42694 [details]
patch to fix this issue.

Thanks for tackling this! We just need a layout test and one small nit:

> Index: WebCore/ChangeLog
> ===================================================================
> --- WebCore/ChangeLog	(revision 50615)
> +++ WebCore/ChangeLog	(working copy)
> @@ -1,3 +1,16 @@
> [phone]  Johnny Ding  <[e-mail]>
> +
> +        Reviewed by NOBODY (OOPS!).
> +
> +        https://bugs.webkit.org/show_bug.cgi?id=31224
> +        Returns a StyleSheet object instead of HTMLStyleElement when using

Please update this to match the subject of the bug (including [V8] prefix).

> +        V8 engine to retrieve style sheet by a name from document.styleSheets


.
> +
> +        No new tests since it is only V8 binding issue.(JS binding is OK)

Well, this is an easily testable case, so I would say a layout test is in order, regardless
of whether it's a bindings issue for one engine and not another.

[Dimitri Glazkov (Google)]

I wonder if there's already a layout test that we're failing that tests this.

[johnnyding]

Created attachment 42696 [details]
patch v2 for fix

Thanks, patch v2 is coming:)

[johnnyding]

Created attachment 42698 [details]
patch v3 for fix

[johnnyding]

Created attachment 42699 [details]
patch v3 for fix

[Dimitri Glazkov (Google)]

Comment on attachment 42699 [details]
patch v3 for fix

Lovely. r=me.

[WebKit Commit Bot]

Comment on attachment 42699 [details]
patch v3 for fix

Clearing flags on attachment: 42699

Committed r50637: <http://trac.webkit.org/changeset/50637>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.