[Webkit-unassigned] [Bug 32580] JS Event listeners should not call Document::updateStyleForAllDocuments()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=32580





--- Comment #13 from James Robinson <jamesr at chromium.org>  2010-02-14 20:00:13 PST ---
No, because recalcStyle() has side effects other than updating styles.  For
instance. HTMLFormControl::recalcStyle() enqueues a call to the virtual
RenderObject::updateFromElement() function.  Several overrides of this
(RenderMenuList::updateFromElement, RenderListBox::updateFromElement) cause
updates within the DOM like updating selected state, etc.

What happens in most tests currently is:

1.) The parser creates some DOM structure
2.) DOMContentLoaded fires, which calls Document::updateStyleForAllDocuments(),
which forces pending updates to occur.
3.) The test code runs in the body's onload handler.
4.) The style time fires.

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