[Webkit-unassigned] [Bug 257615] Fix getBBox() returning (0, 0) bug when width or height is zero

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=257615

--- Comment #2 from Karl Dubost <karlcow at apple.com> ---
In addition to what Alex mentioned
there are a number of issues around
https://wpt.fyi/results/svg/types/scripted?label=master&label=experimental&aligned&q=getbbox

Also 
https://bugs.webkit.org/buglist.cgi?quicksearch=getbbox

Probably it would be worth to open an issue on 
https://github.com/w3c/svgwg/issues?q=is%3Aissue+is%3Aopen+getbbox

with a pointer to the thread Alex found.
https://lists.w3.org/Archives/Public/www-svg/2012Aug/thread.html#msg14

Gecko/WebKit at the time were aligned on ignoring the shape and consider it as a display: none.

The state of implementations was described in 
https://lists.w3.org/Archives/Public/www-svg/2012Aug/0043.html


On SVG 2 current Editor Draft
https://svgwg.org/svg2-draft/types.html#__svg__SVGGraphicsElement__getBBox


> The getBBox method is used to compute the bounding box of 
> the current element. When the getBBox(options) method is 
> called, the bounding box algorithm is invoked for the 
> current element, with fill, stroke, markers and clipped 
> members of the options dictionary argument used to control 
> which parts of the element are included in the bounding 
> box, using the element's user coordinate system as the 
> coordinate system to return the bounding box in. A newly 
> created DOMRect object that defines the computed bounding 
> box is returned. 

And the paragraph ends with:

> If getBBox gets called on a non-rendered element, and 
> the UA is not able to compute the geometry of the element, 
> then throw an InvalidStateError.

So at least it should throw an InvalidStateError.


(If I understood correctly.)

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