Bug 106600 – Bad spacing inside MathML formulas when text-indent is specified

• Component: MathML
• Status: RESOLVED FIXED

[Frédéric Wang (:fredw)]

Created attachment 182201 [details]
Testcase

See the testcase, where I use the CSS rule

p { text-indent: 2em; }

There are large gaps inside the formulas in Chrome 24. This seems similar to this old Gecko's bug: https://bugzilla.mozilla.org/show_bug.cgi?id=454085 and could be fixed the same way. Interestingly, if you uncomment the <script> and let MathJax process the <math>, then the page renders correctly.

[Frédéric Wang (:fredw)]

Fixing this bug should just be a matter of adding "text-indent: 0" rules in

Source/WebCore/css/mathml.css

[Frédéric Wang (:fredw)]

So it seems that the bug appears with the latest LaTeXML version (with new CSS style). See for instance my blog:

http://www.maths-informatique-jeux.com/blog/frederic/?post/2013/04/04/Suslin%E2%80%99s-Problem

[Frédéric Wang (:fredw)]

Created attachment 200640 [details]
Patch V1

[Frédéric Wang (:fredw)]

Can someone please review the patch?

[Martin Robinson]

(In reply to comment #4)
> Can someone please review the patch?

This patch doesn't change any test results or include any new tests?

[Frédéric Wang (:fredw)]

(In reply to comment #5)
> This patch doesn't change any test results or include any new tests?

This only resets the text-indent value on the <math> element. So this only has an effect on pages that modify text-indent and contain a <math> element. I thought it was a trivial change so didn't need tests. Apparently, everything is green above.

[Martin Robinson]

(In reply to comment #6)
> (In reply to comment #5)
> > This patch doesn't change any test results or include any new tests?
> 
> This only resets the text-indent value on the <math> element. So this only has an effect on pages that modify text-indent and contain a <math> element. I thought it was a trivial change so didn't need tests. Apparently, everything is green above.

[Martin Robinson]

(In reply to comment #
> (In reply to comment #
> This patch doesn't change any test results or include any new tests?
> 
> This only resets the text-indent value on the <math> element. So this only has an effect on pages that modify text-indent and contain a <math> element. I thought it was a trivial change so didn't need tests. Apparently, everything is green above.

I think it could be useful for this to have a test so that we don't regress here. It seems that a reference test could be fairly trivial in this case actually. In general, changes to WebCore need tests and I'd say doubly so for changes to layout.

[Frédéric Wang (:fredw)]

Created attachment 201981 [details]
Patch V2

[WebKit Commit Bot]

Comment on attachment 201981 [details]
Patch V2

Clearing flags on attachment: 201981

Committed r150264: <http://trac.webkit.org/changeset/150264>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.