[Webkit-unassigned] [Bug 50126] Fallback content in canvas element not focusable

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=50126





--- Comment #29 from Dave Hyatt <hyatt at apple.com>  2011-02-28 13:48:32 PST ---
The other option would be to turn RenderHTMLCanvas into a RenderBlock subclass.  Then it acts as a proper container (and containing block), and you have a lots of control over what you can do to the children.

For example:

(1) You can set overflow:hidden when fallback content is present to prevent layout overflow.
(2) You can make the canvas block act as a containing block for all children regardless of their positioning by patching container() and containingBlock().
(3) You can make the canvas have a layer and establish a stacking context when fallback content is present.
(4) Force visibility:hidden down the descendant tree and you don't even have to patch painting and hit testing.

canvas * { visibility:hidden !important }

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