Re: Math whitespace commands and docx output

[John MacFarlane <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org>]

If OpenDocument (the XML format used in ODT) uses MathML,
then pandoc can create that instead of "faking it with
unicode" as it does now for OpenDocument.



+++ Denis José Navas Vega [Nov 25 16 20:25 ]:
>   I made some tests that I wish to share with the group.
>   This is the ecuation in docx as readed by LibreOffice:
>       {y =m x +b  none  none  \( 1  \)}
>   You can observe that LibreOffice can't interprete the quad spaces and
>   translates
>   it as 'none'.
>   The same equation generated by Pandoc from markdown to odt, lacks the
>   space.
>   If made directly with the LibreOffice suite, its equation editor
>   provides a tilde
>   '~' character with provides a 'large space' according to LibreOffice
>   MathGuide.
>   It is necessary to use four tildes to equal the space of an quad as
>   viewed in
>   MS Office. For a qquad are necesary 8 tildes ('~~~~~~~~') to represent
>   that
>   space. Thats is explained in the following text:
>       From Math-guide (pag 38):
>       Space at the end of a formula
>       The grave accent ` inserts a small additional space into the
>   formula; the
>       tilde ~ inserts a larger one. In the basic installation, these
>   symbols are
>       ignored when they occur at the end of a formula. However, when
>   working with
>       running text, it may be necessary to include spacing at the end of
>   formulas
>       as well. This customization is only available when you are working
>   with a
>       Math document, and not when you are embedding a Math object.
>   The next code is an export of LibreOffice Math as MathML 1.01, of the
>   equation written in 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>
>       ~~~
>   I verified with
>   [Wolfram
>   Research](http://www.mathmlcentral.com/Tools/ValidateMathML.jsp)
>   and reports that "The input is valid MathML".
>   Pandoc's manual states (p46, pdf):
>       Docx It will be rendered using OMML math markup.
>       RTF, OpenDocument, ODT It will be rendered, if possible, using
>   unicode
>       characters, and will otherwise appear verbatim.
>   LibreOffice MathGuide informs that are some limitations converting math
>   objects
>   from docx to odt; therefore its preferable the direct route markdown
>   --> odt.
>   But my test shows that what Pandoc's generate is not understood as
>   spaces
>    by LibreOffice.
>   Here I reproduce the manual aboout conversion by LibreOffice from docx
>   to odt
>   (pag 42), that confirms the restrictions from docx to odt.
>       Microsoft file formats
>       The options in Tools > Options > Load/Save > Microsoft Office [in
>   LibreOffice]
>       control how the import and export of Microsoft Office file formats
>   is
>       carried out in regard to formulas.
>       Loading
>       If [L] is checked, LibreOffice converts Microsoft formulas into
>   native
>       format when a document is loaded. This is possible if the formulas
>       were created with MathType 4 (up to version 3.1) or with the
>   Microsoft
>       Equation Editor. The latter is a reduced, older version of MathType
>       licensed by Microsoft and included in the Microsoft Office package.
>       Formulas created by newer versions of MathType or by the new
>   Microsoft
>       formula editor “OMML 5 Equation Editor” (Microsoft Office Suite
>   2010
>       and to some extent 2007) cannot be converted.
>       If a document created in Microsoft Office 2010 and containing an
>   OMML
>       formula is saved into a .doc file format, Microsoft Office converts
>       the formula into a graphic. Only this graphic is then accessible to
>       LibreOffice.
>       If you load a .docx document that contains OMML formulas, these
>   fail
>       in conversion whether [L] is checked or not.
>       Inside Microsoft Office, formulas created with MathType or
>   Microsoft
>       Equation Editor are treated as OLE objects. If [L] is not checked,
>       LibreOffice maintains this. Double-clicking on the object launches
>       MathType and new formulas can be inserted using Insert > Object >
>   OLE
>       Object. This setup is to be recommended if you have MathType
>   installed
>       and wish to use it to create and edit formulas.
>   Therefore, is preferable the direct route 'markdown --> odt' and look
>   by
>   mechanisms to get the \qquad spaces. Its preferable to settle on math
>   expressed with TeX commands, because is a referent on the field.
>   El viernes, 25 de noviembre de 2016, 4:35:47 (UTC-6), John MacFarlane
>   escribió:
>
>     You can see how pandoc handles whitespace here (using the
>     texmath executable from texmath):
>     % echo "\\qquad" | texmath -t omml
>     <m:oMathPara>
>       <m:oMathParaPr>
>         <m:jc m:val="center" />
>       </m:oMathParaPr>
>       <m:oMath>
>         <m:r>
>           <m:t>  </m:t>
>         </m:r>
>       </m:oMath>
>     </m:oMathPara>
>     It uses a "text" node with an appropriate combination of unicode
>     whitespaces.  I don't know if there's a better way to do this,
>     but I can say that the results look fine in Word, so this may be
>     a LibreOffice issue.
>     +++ Thomas J. Duck [Nov 24 16 07:52 ]:
>     >   Hi there,
>     >   Pandoc seems to ignore math whitespace commands when the output
>     format
>     >   is docx (as viewed with LibreOffice 5.2.3.3).  For example, the
>     \qquad
>     >   in the following equation is ignored:
>     >   $$ y = mx + b \qquad (1) $$
>     >   It works for LaTeX and html output.
>     >   This is a simple example: Whitespace is used for many purposes
>     in
>     >   writing equations.
>     >   Is this a bug, or am I missing something?  Is there a
>     workaround?
>     >   Thanks,
>     >   Tom
>     >
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