On 7/16/07, Michael Droettboom <[EMAIL PROTECTED]> wrote:
> I'm working on some improvements to the mathtext engine on a branch.
> Feel free to join in if curious, but I expect to break lots of things as
> I go.
>
> https://matplotlib.svn.sourceforge.net/svnroot/matplotlib/branches/mathtext_mgd/
>
> I've collected a bunch of math expressions from the source tree for use
> in regression testing. If you have any math strings of your own that
> you want to make sure I don't break, please send them to me (probably
> should be off-list to conserve noise).
>
> Here's the preliminary TODO list I'm working with in no particular order
> (compiled from the TODO list in mathtext.py and the list of improvements
> in mathtext2.py):
>
> 1. Deal with nested sub/superscripts, such as $x_i_j$, equivalent to
> $x_{i_j}$
Hmm, I thought that already worked -- it's been a long time since I
touched that code. What is the problem here?
> 2. Make the font change tags (\cal, \tt, \rm etc.) behave more like TeX,
> e.g. use ${\rm sin}$ instead of $\rm{sin}$
> 3. Support roman function names, e.g. $\sin$ as a shortcut for ${\rm sin}$
> 4. Implement \frac
> 5. Other layout commands, like large \sqrt (I suspect there's a very
> large list of these things and they will have to be prioritized.)
You will probably want to implement some primitive drawing in the
ft2font pixel buffer, to support things like a \frac bar (\frac would
be nice BTW)
> 6. Support kerning (probably best put off until we have good fonts with
> kerning information to use, e.g. STIX fonts)
Ha, STIX, never made a deadline they could keep. Given their response
to Eric's inquiry, we could be waiting quite a while.
> (1 and 2 are already implemented in the branch.)
>
> I don't want to start a long thread about all the desired features for
> mathtext -- I'm sure there are lots of them. There will need to be some
How about a short one :-) I think one of the most important
enhancements will be to support embedded mathtext expressions, eg
r'some text $\sigma=1$ some more text'
Currently we have to do something like
r'$\rm{some text\ }\sigma=1\rm{\ some more text}$'
which is pretty bad. This might require some changes to how mathtext
is identified -- the presence of an even number of dollar signs is
probably sufficient, but in some corner cases might give the wrong
results, requiring a flag to overrride, etc. THat or we simply adopt
the TeX standard and require all literal $ to be quoted. THe latter
wil break some code but is probably better than anything else.
JDH
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