139213 - text-decoration: underline with <msup></msup> produces (mathematical) wrong results

Status: RESOLVED FIXED

(Core :: MathML, defect)

Description

[Jochen Eisinger]

Hi,

Using css text-decoration: underline with MathML and <msup></musp> produces
mathematical wrong results, i.e. not the whole term is underlined but every
single character, thus looking like something known as "falling factorial".

Here is what I want: $\underline{\mathbb{R}^n}$, this is what it is in MathML:

<div class="underlined"><msup><mi>&Ropf;</mi><mi>n</mi></msup></div>

with stylesheet div.underlined { text-decoration: underline; }

and I get $\underline{\mathbb{R}}^{\underline{\mathbb{R}}$ which is, at least at
our university here, defined as "falling factorial" (M^{\underline{n}} := M
\cdot (M-1)\cdots (M-n)).

regards
-- jochen

Comment 1

[Hixie (not reading bugmail)]

test case? I'm afraid I don't understand the (LaTeX?) markup description.

Comment 2

[Jochen Eisinger]

A test case is available from pinguin-zuechter.de/test.xml. I would have
attached it to the bug, if bugzilla would have accepted my file (instead it
asked my tons of times for my password an claimed no file was selected for
upload... well).

The fact that the "n" gets underlined seperatly changes the meaning of the term
(and looks ugly...).

regards
-- jochen

Comment 3

[Boris Zbarsky [:bzbarsky]]

Attachment: image for testcase

Comment 4

[Boris Zbarsky [:bzbarsky]]

Attachment: style for testcase

Comment 5

[Boris Zbarsky [:bzbarsky]]

Attachment: Testcase (load this attachment)

Comment 6

[Boris Zbarsky [:bzbarsky]]

confirmed.

Ian, you should really learn LaTeX one of these days... :)

Comment 7

[rbs]

Fixed via bug 1777.