How to add math formulas in odt document?

[zimakim]

I need to add mathematical formulas in document. I have not found an example of how to do it

[zimakim]

I've solved this problem by writing a few functions. Is it possible to include these functions in opfpy in the next release?

#!/usr/bin/env python
# -*- coding: utf-8 -*-

from xml.dom.minidom import parseString
from xml.dom import Node
import odf
import odf.opendocument
import odf.text
from odf.element import Element
from namespaces import MATHNS

math_templ = u'\
<math xmlns="http://www.w3.org/1998/Math/MathML">\
<semantics>\
<annotation encoding="StarMath 5.0">%s</annotation>\
</semantics></math>'

def gen_odf_math_(parent):
    elem = Element(qname = (MATHNS,parent.tagName))
    if parent.attributes:
        for attr, value in parent.attributes.items():
            elem.setAttribute((MATHNS,attr), value, check_grammar=False)

    for child in parent.childNodes:
        if child.nodeType == Node.TEXT_NODE:
            text = child.nodeValue
            elem.addText(text, check_grammar=False)
        else:
            elem.addElement(gen_odf_math_(child), check_grammar=False)
    return elem

def gen_odf_math(starmath_string):
    u'''
    Generating odf.math.Math element
    '''
    mathml = math_templ % (starmath_string)
    math_ = parseString(mathml.encode('utf-8'))
    math_ = math_.documentElement
    odf_math = gen_odf_math_(math_)
    return odf_math


def main():
    doc = odf.opendocument.OpenDocumentText()
    p = odf.text.P(text=u'text')
    df = odf.draw.Frame( zindex=0, anchortype='as-char')
    p.addElement(df)
    doc.text.addElement(p)

    formula = 'c = sqrt(a^2+b_2) + %ialpha over %ibeta'
    math = gen_odf_math(formula)
    do = odf.draw.Object()
    do.addElement(math)
    df.addElement(do)

    outputfile = u'result'
    doc.save(outputfile, True)

if __name__ == '__main__':
    main()

[zimakim]

A more convenient way

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import odf
from odf.opendocument import OpenDocumentText
from odf.element import Element
from odf.text import P
from odf.math import Math
from namespaces import MATHNS


def main():
    doc = OpenDocumentText()
    p = P(text=u'text')
    df = odf.draw.Frame( zindex=0, anchortype='as-char')
    p.addElement(df)
    doc.text.addElement(p)

    formula =u'c=sqrt(a^2+b^2)'
    math = Math()
    annot = Element(qname = (MATHNS,u'annotation'))
    annot.addText(formula, check_grammar=False)
    annot.setAttribute((MATHNS,'encoding'), 'StarMath 5.0', check_grammar=False)
    math.addElement(annot)
    do = odf.draw.Object()
    do.addElement(math)
    df.addElement(do)

    outputfile = u'result'
    doc.save(outputfile, True)

if __name__ == '__main__':
    main()

[ntala]

I tried the solutions given but a problem remains : in the document "result.odt", the formula is a little frame and its content is invisible. I must edit it by double-clicking on it to see it.
Is the behavior the same with you ?

[scizers]

Hello @ntala ,
Its showing me the same problem, did you solve it ?

[zimakim]

@scizers This is bug in openoffice https://forum.openoffice.org/en/forum/viewtopic.php?p=35596

[scizers]

@zimakim
I guess the only was to handle it is to give height and width mannualy while defining the frame

df = odf.draw.Frame( zindex=0, anchortype='as-char' , width=100 , height=50)

[zimakim]

@scizers
I use this macro in openoffice for force update math formulas

sub ForceUpdate
dim oCurrentController as variant: oCurrentController = ThisComponent.getCurrentController()
dim oDoc as variant: oDoc=ThisComponent
if not(oCurrentController.supportsService("com.sun.star.text.TextDocumentView")) then
'	msgbox("Macro works only in text documents.")
	exit sub
end if
dim oModelTextDocument as variant: oModelTextDocument = oCurrentController.Model
dim oEmbeddedObjects as variant: oEmbeddedObjects = oModelTextDocument.EmbeddedObjects
dim nIndex as long
dim nEndIndex as long: nEndIndex = oEmbeddedObjects.Count-1
dim oEmbeddedObject as variant: rem like green handle status
dim oModel as variant: rem like edit status
dim oXCOEO as variant: rem oExtendedControlOverEmbeddedObject
for nIndex=0 to nEndIndex
	oEmbeddedObject = oEmbeddedObjects.getByIndex(nIndex)
	oModel = oEmbeddedObject.Model: rem might be empty; css.comp.math.FormulaDocument
	if Not(isEmpty(oModel)) then
		if oModel.supportsService("com.sun.star.formula.FormulaProperties") then
			rem It is a formula object.
			oXCOEO = oEmbeddedObject.ExtendedControlOverEmbeddedObject
			oXCOEO.update()
		end if	
	end if
next nIndex
end sub