[Libreoffice-ux-advise] [Bug 65808] punctuation in formulas ought to have uniform style

https://bugs.documentfoundation.org/show_bug.cgi?id=65808

V Stuart Foote <vstuart.foote@utsa.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW
                 CC|                            |tabe@fixedpoint.jp,
                   |                            |vstuart.foote@utsa.edu
          Component|ux-advise                   |Formula Editor

--- Comment #5 from V Stuart Foote <vstuart.foote@utsa.edu> ---
Confirming.

On Windows 8.1 Ent 64-bit en-US with
Version: 5.1.4.2 (x64)
Build ID: f99d75f39f1c57ebdd7ffc5f42867c12031db97a
CPU Threads: 8; OS Version: Windows 6.29; UI Render: GL; 
Locale: en-US (en_US)

and on 
Version: 5.3.0.0.alpha0+
Build ID: 4a6329badc9c8679945d1a1ec225e26e15d7bfd2
CPU Threads: 8; OS Version: Windows 6.2; UI Render: GL; 
TinderBox: Win-x86@62-merge-TDF, Branch:MASTER, Time: 2016-07-30_10:25:39
Locale: en-US (en_US); Calc: CL

In the Math formula editor it seems the range of Unicode codepoints that are
treated as "variables" and so receiving default "italic" styling is *too*
broad.

For a simple demonstration enter the following in the formula editor:

U+2039...U+203a U+2329...U+232a U+00ab...U+00bb U+221e U+2225
newline
U+27e6 { 2cdot %ipi r } over { %DELTA %imu } U+27e7

Then convert each Unicode point to its glyph (i.e. position at end of each and
<alt>+x)

The default "Liberation Serif, Italic" assigned to variables renders the entire
string except the Greek characters as variables and so receives an italic
styling.

Modifying the Math menu value for Format -> Fonts: "Variables" dialog and
unchecking Italic renders the strings more reasonably--showing the left and
right angle brackets vertical, and the parallel without a slant.

Suspect the Unicode points classified as variables need to be more constrained.

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