[Webkit-unassigned] [Bug 16483] SVG should allow clicks to "fall through" to XHTML content when transparent

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Tue Dec 18 16:11:18 PST 2007


http://bugs.webkit.org/show_bug.cgi?id=16483





------- Comment #1 from eric at webkit.org  2007-12-18 16:11 PDT -------
Ok, I think this test is wrong.

http://www.w3.org/2004/CDF/TestSuite/WICD_CDR_WP1/test-focusable-points.xhtml

The event should dispatch to the front-most element under that mouse location. 
(I'm sure there is a spec which says this.)

In this case, that's the SVG <rect> element which is semi-transparent.  Since
pointer-events defaults to  "visiblePainted" the <rect> element can actually
accept events, and thus the hit testing stops.  An event is dispatched up the
tree to the <rect> element, through the <object> and <svg> elements, but NOT
touching the <html:a> elements which are not in the ancestor tree for the
<rect>.  Then the event bubbles back down through the same tree, again, never
touching the <html:a> elements.

If the <rect> had pointer-events="none" specified, then it would fail to
hit-test and the <html:a> element should actually be clickable.

We still fail this test with pointer-events="none", not sure why.  That might
be  real bug on our part, or I might be misinterpreting how hit testing should
actually work.


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