https://bugs.documentfoundation.org/show_bug.cgi?id=104194
Bug ID: 104194
Summary: MathML <mspace width="2.0em"> not rendered by the
equation edito
Product: LibreOffice
Version: 5.1.5.2 release
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: Formula Editor
Assignee: libreoffice-bugs@lists.freedesktop.org
Reporter: denis.na...@gmail.com
Created attachment 129040
--> https://bugs.documentfoundation.org/attachment.cgi?id=129040&action=edit
Original text document with markdown markup
This is a bug similar but I think not equal to bug 76296 titled 'FILEOPEN: Open
or import of MathML file does not write ~ or ` for the <mspace>
The case originated with a formula written with TeX sintaxis in markdown markup
converted to docx and odt with Pandoc. The discussion is accesible in this
link:
https://groups.google.com/forum/?hl=es-419#!topic/pandoc-discuss/H7lXXLR3k90
Was reported by a user with LO 5.2.3.3. and by me with LO 5.1.5.2; consists in
that MS word docx represents correctly the 2 em space between the formula and
the manual number included with the formula, but LibreOffice does not.
After some tests I found two things:
a) LibreOffice receive from Pandoc conversion to odt the following
specification "<mspace width="2.0em">" within the formula's MathML but does not
express it as an space at all. Don't throw errors also.
b) Recreating the formula with LibreOffice, required me to use eight (8) "~"
to get a similar space as generated by MS.
The space used in the formula with TeX sintax is 2 em (the width of letter 'M')
using command '\qquad'.
I include four files:
a) Original markdown file (mwcado.txt).
b) MS docx file which render the space(mwcado.docx).
c) LO odt file which does not render the space (mwcado-original.odt).
d) LO odt file modified by me (mwcado-modified.odt).
Additionally, attracts my attention that the formula that I recreated includes
StarMath 5.0 markup, to recreate the space but it isn't an space specified in
terms of ems thats the space unit used.
Here I reproduce the content of my considerations that published in Pandoc's
newsgroup:
LibreOffice does not understand '<mspace width="2.0em">', comparing the
following MathML texts (copied from the unzipped odt).
Therefore, I must accept that LibreOffice does not correctly interpret \ qquad
or that at least, '<mspace width="2.0em">' is an unimplemented instruction
in LibreOffice.
## Markdown source
This is the markdown I used to produce the ecuation in question:
For example, the \qquad in the following equation is ignored:
$$ y = mx + b \qquad (1) $$
Y otra ecuación sin el espacio qquad para cotejar diferencias:
$$ y = mx + b (1) $$
## Results
This is what Pandoc produces when the ecuation has \qquad:
<?xml version='1.0' ?>
<math display="block"
xmlns="http://www.w3.org/1998/Math/MathML";><mrow><mi>y</mi><mo>=</mo><mi>m</mi><mi>x</mi><mo>+</mo><mi>b</mi><mspace
width="2.0em"></mspace><mo stretchy="false" form="prefix">(</mo><mn>1</mn><mo
stretchy="false" form="postfix">)</mo></mrow></math>
And this is what Pandoc produces without \qquad:
<?xml version='1.0' ?>
<math display="block"
xmlns="http://www.w3.org/1998/Math/MathML";><mrow><mi>y</mi><mo>=</mo><mi>m</mi><mi>x</mi><mo>+</mo><mi>b</mi><mo
stretchy="false" form="prefix">(</mo><mn>1</mn><mo stretchy="false"
form="postfix">)</mo></mrow></math>
And this is what I got using the '~' space command with LibreOffice:
<?xml version="1.0" encoding="UTF-8"?>
<math xmlns="http://www.w3.org/1998/Math/MathML";
display="block"><semantics><mrow><mrow><mi>y</mi><mo
stretchy="false">=</mo><mi>m</mi></mrow><mrow><mi>x</mi><mo
stretchy="false">+</mo><mi>b</mi></mrow><mspace width="16em"/><mo
stretchy="false">(</mo><mn>1</mn><mo stretchy="false">)</mo></mrow><annotation
encoding="StarMath 5.0">{y = m x + b ~~~~~~~~ \( 1
\)}</annotation></semantics></math>
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