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# -*- coding: utf-8 -*-
"""
sphinx.util.math
~~~~~~~~~~~~~~~~
Utility functions for math.
:copyright: Copyright 2007-2018 by the Sphinx team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
if False:
# For type annotation
from docutils import nodes # NOQA
from sphinx.builders.html import HTMLTranslator # NOQA
def get_node_equation_number(writer, node):
# type: (HTMLTranslator, nodes.Node) -> unicode
if writer.builder.config.math_numfig and writer.builder.config.numfig:
figtype = 'displaymath'
if writer.builder.name == 'singlehtml':
key = u"%s/%s" % (writer.docnames[-1], figtype)
else:
key = figtype
id = node['ids'][0]
number = writer.builder.fignumbers.get(key, {}).get(id, ())
return '.'.join(map(str, number))
else:
return node['number']
def wrap_displaymath(text, label, numbering):
# type: (unicode, unicode, bool) -> unicode
def is_equation(part):
# type: (unicode) -> unicode
return part.strip()
if label is None:
labeldef = ''
else:
labeldef = r'\label{%s}' % label
numbering = True
parts = list(filter(is_equation, text.split('\n\n')))
equations = []
if len(parts) == 0:
return ''
elif len(parts) == 1:
if numbering:
begin = r'\begin{equation}' + labeldef
end = r'\end{equation}'
else:
begin = r'\begin{equation*}' + labeldef
end = r'\end{equation*}'
equations.append('\\begin{split}%s\\end{split}\n' % parts[0])
else:
if numbering:
begin = r'\begin{align}%s\!\begin{aligned}' % labeldef
end = r'\end{aligned}\end{align}'
else:
begin = r'\begin{align*}%s\!\begin{aligned}' % labeldef
end = r'\end{aligned}\end{align*}'
for part in parts:
equations.append('%s\\\\\n' % part.strip())
return '%s\n%s%s' % (begin, ''.join(equations), end)
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