80 lines
2.2 KiB
Python
80 lines
2.2 KiB
Python
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"""Module with some functions for MathML, like transforming MathML
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content in MathML presentation.
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To use this module, you will need lxml.
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"""
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from sympy.utilities.pkgdata import get_resource
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from sympy.utilities.decorator import doctest_depends_on
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__doctest_requires__ = {('apply_xsl', 'c2p'): ['lxml']}
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def add_mathml_headers(s):
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return """<math xmlns:mml="http://www.w3.org/1998/Math/MathML"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://www.w3.org/1998/Math/MathML
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http://www.w3.org/Math/XMLSchema/mathml2/mathml2.xsd">""" + s + "</math>"
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@doctest_depends_on(modules=('lxml',))
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def apply_xsl(mml, xsl):
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"""Apply a xsl to a MathML string.
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Parameters
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==========
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mml
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A string with MathML code.
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xsl
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A string representing a path to a xsl (xml stylesheet) file.
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This file name is relative to the PYTHONPATH.
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Examples
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========
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>>> from sympy.utilities.mathml import apply_xsl
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>>> xsl = 'mathml/data/simple_mmlctop.xsl'
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>>> mml = '<apply> <plus/> <ci>a</ci> <ci>b</ci> </apply>'
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>>> res = apply_xsl(mml,xsl)
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>>> ''.join(res.splitlines())
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'<?xml version="1.0"?><mrow xmlns="http://www.w3.org/1998/Math/MathML"> <mi>a</mi> <mo> + </mo> <mi>b</mi></mrow>'
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"""
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from lxml import etree
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parser = etree.XMLParser(resolve_entities=False)
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ac = etree.XSLTAccessControl.DENY_ALL
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s = etree.XML(get_resource(xsl).read(), parser=parser)
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transform = etree.XSLT(s, access_control=ac)
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doc = etree.XML(mml, parser=parser)
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result = transform(doc)
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s = str(result)
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return s
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@doctest_depends_on(modules=('lxml',))
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def c2p(mml, simple=False):
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"""Transforms a document in MathML content (like the one that sympy produces)
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in one document in MathML presentation, more suitable for printing, and more
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widely accepted
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Examples
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========
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>>> from sympy.utilities.mathml import c2p
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>>> mml = '<apply> <exp/> <cn>2</cn> </apply>'
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>>> c2p(mml,simple=True) != c2p(mml,simple=False)
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True
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"""
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if not mml.startswith('<math'):
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mml = add_mathml_headers(mml)
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if simple:
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return apply_xsl(mml, 'mathml/data/simple_mmlctop.xsl')
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return apply_xsl(mml, 'mathml/data/mmlctop.xsl')
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