17567 - no visual indication of missing characters

Status: VERIFIED DUPLICATE of bug 6585

(Core :: Internationalization, defect, P2)

Description

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

DESCRIPTION:  There is currently no visual indication of characters that could
not be displayed.  This is a serious problem because the user could be unaware
that he is missing anything.

STEPS TO REPRODUCE:
 * load attached test case

ACTUAL RESULTS:
 * there should be five characters after the ":" at the end of the paragraph.
They don't need to be the right ones, but there should be something there.

EXPECTED RESULTS:
 * There's nothing after the ":".

DOES NOT WORK CORRECTLY ON:
 * Linux, apprunner, 1999-10-28-08-M11
 * Linux, viewer, build of 1999-10-29 09:30PDT

Comment 1

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Attachment: attachment described in bug

Comment 2

[Frank Tang]

reassign this to erik.

Comment 3

[Erik van der Poel]

I wrote some code to handle "symbol" fonts on Windows. That design was also
intended to be able to handle the case where none of the system fonts have any
glyphs for the current character. The code is currently in Roger Sidje's hands,
and will be checked in for MathML at some point. We can then extend it to
handle this bug report and also to cover the other platforms.

Comment 4

[bobj]

Moved post sabbatical...

Comment 5

[rbs]

I have now landed the code. Builds from now on display symbols
on Windows. Shyjan Mahamud <[e-mail]> did some
MathML work to enable the symbol font on Linux. The code
was landed as well, but it is in #ifdef MOZ_MATHML. Back to
you to make the appropriate bit part of the default build.

Comment 6

[Hixie (not reading bugmail)]

*** This bug has been marked as a duplicate of 6585 ***

Comment 7

[Jeremy Misavage]

Definitely duplicates.  Both deal with what should be done if a character in the
current font does not exist.