698323 - MathML menclose is missing offset* properties

Status: RESOLVED INVALID

(Core :: MathML, defect)

Description

[Greg Hazel]

Attachment: foo.html

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:7.0.1) Gecko/20100101 Firefox/7.0.1
Build ID: 20110928134238

Steps to reproduce:

Tried to get the width and height of a menclose element. (demo attached)


Actual results:

Found unexpected undefined elements.


Expected results:

Should have found offset elements like other DOM elements.

Comment 1

[Boris Zbarsky [:bzbarsky]]

The offset* properties are on the HTMLElement interface.

MathML elements don't implement that interface, of course.

Similarly, offset* is not present on SVG elements, or any other non-HTML element in the DOM.

Which is fine, since the offset* properties return incorrect dimensions anyway.  If you want to get the width and height of something, use getBoundingClientRect, which _is_ on all elements.

Comment 2

[Greg Hazel]

getBoundingClientRect seems to be affected by scroll position. Are the offset orop

Comment 3

[Greg Hazel]

Nevermind, I figured out the scroll position thing.

Comment 4

[Boris Zbarsky [:bzbarsky]]

> getBoundingClientRect seems to be affected by scroll position.

The width and height (what you said you're looking for) are certainly not.

If you can explain what you're trying to do and why getBoundingClientRect doesn't work for you, I'll forward that along to the CSSOM View working group defining the specs for this.

Comment 5

[Greg Hazel]

The goal is very simple: find the exact placement and size of the menclose, and overlay a DOM element exactly on top of it.

Between scroll adjusted top and left from getBoundingClientRect and the width and height you mentioned, I was able to do it.

Comment 6

[Greg Hazel]

But man it would have been a lot easier if I could have replaced the menclose with an input field in the DOM.