[liblouis-liblouisxml] LibLouisUTDML and tables
- From: Michael Whapples <mwhapples@xxxxxxx>
- To: liblouis-liblouisxml@xxxxxxxxxxxxx
- Date: Wed, 26 Mar 2014 11:23:49 +0000
Hello,
The last couple of commits I made relate to tables with varying number
of entries per row.
This was mainly in response to the illegal characters problem Brandon
had in BrailleBlaster, which was caused by a mtable element with mtr
elements with differing numbers of mtd elements inside them.
According to the MathML 2.0 standard, it appears that should an mtr be
short of the correct number of entries on a row then it should pad it
with empty mtd elements.
My fix does not quite do actual padding with empty mtd elements, but
rather it accepts that the row has been finished and so will start a new
row. I can put in padding to show the additional empty entries if desired.
This fix though could potentially apply to other table structures in a
document. My reason for taking this route was to try and prevent having
format specific code inside liblouisutdml (try and keep the format
details in semantic action files), so this seemed the lesser of two evils.
Whilst this does not deal with rowspan and columnspan attributes, it
does mean though that in these cases liblouisutdml will at least produce
something sensible as output as it will understand there being less than
the expected number of entries in a row.
Another possible concern I have is that if the first row of a mtable
element does not have the full set of mtd elements (IE. less than other
rows) this might upset liblouisutdml. I will look at creating a fix to
this potential issue unless someone comes back and says that it would
not be valid MathML anyway.
Michael Whapples
For a description of the software, to download it and links to
project pages go to http://www.abilitiessoft.com
Other related posts:
