206696 - Double-struck identifiers are inconsistently styled in MathML

Status: RESOLVED FIXED

(Core :: MathML, defect)

Description

[steve.swanson]

When I put double-struck uppercase letters in <mi> tags, some are italic and 
some are not.  In particular, CHNPQRZ are upright and the others are italic.

This might be related to some other MathML font problem, but I didn't see 
anything obvious.

Of course, most mathematicians prefer these characters to be upright.  But 
that's not what the MathML spec wants to see.

Comment 1

[steve.swanson]

Attachment: testcase

Comment 2

[steve.swanson]

Attachment: screenshot

Comment 3

[rbs]

Yeah, there is an incomplete list in mathfont.properties. Those that are kept
insentive are those in the BMP (they are listed in mathfont.properties). Those
that are suffering from the style are the problematic chars of plane 1 which are
internally re-mapped to the PUA. If you add their re-mapped PUA code points in
the intended list in mathfont.properties, the inconsistency goes away.

Comment 4

[steve.swanson]

Attachment: more complete testcase

This one includes double-struck, fraktur and script faces, in upper- and
lowercase.

Comment 5

[steve.swanson]

Attachment: filled in some lines in mathfont.properties

This patch provides the intended style invariant chars for mathvariant.script,
mathvariant.fraktur and mathvariant.double-struck.

I just used mathml.dtd to build these lists.  There may be other Unicode
characters which deserve to be added as well (but since they're not referenced
in mathml.dtd seem less important).

Comment 6

[rbs]

Comment on attachment 124255 [details] [diff] [review]
filled in some lines in mathfont.properties

r+sr=rbs

OK to me. The other characters (if any) are equally important, but this is an
improvement. It is better to have more characters in those lists than few
anyway.

Comment 7

[rbs]

Checked in the trunk.

Want this for the 1.4 branch? If so, feel free to nominate for a=.

Comment 8

[Greg K.]

FWIW, the testcases look even worse using FizzillaMach/2003-05-25-03-trunk.

Comment 9

[rbs]

Care to attach a screenshot contrasting before-and-after the patch?

Comment 10

[Greg K.]

Attachment: Attachment 124254 as seen using FizzillaMach/2003-05-25-03-trunk (before patch)

Comment 11

[rbs]

after patch?

Comment 12

[Greg K.]

Attachment: Attachment 124254 as seen using FizzillaMach/2003-05-27-03-trunk (after patch).png