[webkit-dev] window.internals abuse

Ryosuke Niwa rniwa at webkit.org
Wed Mar 13 10:07:30 PDT 2013

On Wed, Mar 13, 2013 at 10:04 AM, Ryosuke Niwa <rniwa at webkit.org> wrote:

> On Wed, Mar 13, 2013 at 9:59 AM, Simon Fraser <simon.fraser at apple.com>wrote:
>> On Mar 13, 2013, at 9:48 AM, Ryosuke Niwa <rniwa at webkit.org> wrote:
>> On Wed, Mar 13, 2013 at 9:42 AM, Simon Fraser <simon.fraser at apple.com>wrote:
>>> https://bugs.webkit.org/show_bug.cgi?id=80046 (landed in
>>> http://trac.webkit.org/changeset/114081) added
>>> internals. setBackgroundBlurOnNode().
>>> I consider this to be abuse of the Internals object. As shown by the
>>> location of the files (Source/WebCore/*testing*/Internals.*), the
>>> Internals interface is intended for testing, not adding API to toggle
>>> features in WebCore for non-test code.
>> Sorry, I don't follow. setBackgroundBlurOnNode appears to be only called
>> in a layout test as far as I read the patch.  Where is this function called
>> for non-testing purposes?
>> Background blur (or background filters in general) are not a web-exposed
>> feature, so it seems odd that Internals has a switch for some
>> non-web-exposed feature that is only implemented by one port. It feels like
>> this was something added for a UI feature in Chromium, in which case
>> Internals isn't an appropriate way to toggle it.
> What is the rule of thumb here?  Are you specifically objecting to testing
> features that are not Web-exposed?  e.g. would you object to testing
> features only available in dashboard?

Or perhaps you're opposed to adding variables, toggles, etc... to WebCore
just for the sake of testing via internals?

- R. Niwa
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