836977 - inIDOMUtils.getCSSStyleRules() should accept a CSS3 style pseudo-element

Status: NEW

(Core :: CSS Parsing and Computation, defect)

Description

[Tetsuharu OHZEKI [:tetsuharu] (UTC+9)]

There is no way to get the style of ::(-moz-)selection pseudo-element with  inIDOMUtils.getCSSStyleRules() or other methods.

This need to implement the feature of inspect pseudo-element (bug 694019).

Comment 1

[Boris Zbarsky [:bzbarsky]]

Seems to work fine for me.  Do make sure you're passing ":-moz-selection" as the pseudo name to getCSSStyleRules?

Comment 2

[Tetsuharu OHZEKI [:tetsuharu] (UTC+9)]

(In reply to Boris Zbarsky (:bz) from comment #1)
> Seems to work fine for me.  Do make sure you're passing ":-moz-selection" as
> the pseudo name to getCSSStyleRules?

Thank you. getCSSStyleRules works as my expecting.
However, this behavior is a little strange, isn't it? I hope that it also works fine if we passed "::foo" strings like selector level 3, not only CSS2 styles.

Comment 3

[Boris Zbarsky [:bzbarsky]]

Sure.  Might be worth factoring out the code at http://hg.mozilla.org/mozilla-central/file/50cf5bbcb180/layout/style/nsComputedDOMStyle.cpp#l116 and reusing it here or something.  I didn't worry about it too much for an internal API; what's really being passed in is not the pseudo-element name but the internal Gecko atom naming it, which always has a single ':'.