# Problems printing MathML when @font-face is used

RESOLVED WORKSFORME

## Status

### ()

Core
MathML
P5
normal
RESOLVED WORKSFORME
6 years ago
4 years ago

## Tracking

### (Blocks: 1 bug)

Trunk
---
Points:
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Dependency tree / graph

## Attachments

### (1 attachment)

 298 bytes, text/html Details
(Reporter)

### Description

6 years ago
Created attachment 569323 [details]
testcase

If you try to print the testcase, the "+" symbol disappear.

See https://github.com/mathjax/MathJax/issues/137

### Comment 1

6 years ago
Is this mathml-specific?  I seem to recall there being general issues with @font-face and printing...
(Reporter)

### Comment 2

6 years ago
MathJax devs reported another issue:
https://github.com/mathjax/MathJax/issues/172

which corresponds to that Bugzilla entry:
https://bugzilla.mozilla.org/show_bug.cgi?id=468568

but web-fonts do not seem to be involved in the present bug.

I would say this bug has something to do with the <mo> operators, which are treated in a specific way.

### Comment 3

6 years ago
I ran out of time yesterday but I was beginning to think there was a connection with characters that were centred (+, -, &ge; &le;) as they were the _single_ characters that I could get to fail.

[In particular I was looking at those mentioned at http://mxr.mozilla.org/mozilla-central/source/layout/mathml/nsMathMLmoFrame.cpp#220 ]
(Reporter)

### Comment 4

6 years ago
(In reply to John P Baker from comment #3)
> I ran out of time yesterday but I was beginning to think there was a
> connection with characters that were centred (+, -, &ge; &le;) as they were
> the _single_ characters that I could get to fail.
>
> [In particular I was looking at those mentioned at
> http://mxr.mozilla.org/mozilla-central/source/layout/mathml/nsMathMLmoFrame.
> cpp#220 ]

I'm able to reproduce the problem with "[" too. It disappears when I use for example <mtext> instead of <mo> or if I use character outside the operator dictionary ("a" for example)

I think it's an issue with <mo> operators for which nsMathMLmoFrame::UseMathMLChar returns true i.e. those drawn in nsMathMLChar.
(Reporter)

### Comment 5

5 years ago
This bug may depend on bug 736010.
(Reporter)

### Updated

5 years ago
Depends on: 468568
(Reporter)

### Comment 6

5 years ago
I still see the bug even after bug 468568 is fixed.

### Comment 7

5 years ago
Oddly, I have 2 Windows 7 64-bit laptops.  I see the issue on one and not the other.  Trying to figure out what the difference is.
(Reporter)

### Updated

5 years ago
Priority: -- → P5
(Reporter)

### Comment 8

4 years ago
I no longer see this bug on Linux, with Firefox 18. Bill, are you able to reproduce the bug on one of your Windows machine?

### Comment 9

4 years ago
(In reply to Frédéric Wang (:fredw) from comment #8)
> I no longer see this bug on Linux, with Firefox 18. Bill, are you able to
> reproduce the bug on one of your Windows machine?

Printing of the attached testcase works correctly on all of my windows machines using Firefox 18.0.1.
(Reporter)

### Updated

4 years ago
Status: NEW → RESOLVED
Last Resolved: 4 years ago
Resolution: --- → WORKSFORME
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