Showing content from http://svn.python.org/projects/doctools/trunk/sphinx/ext/mathbase.py below:
# -*- coding: utf-8 -*- """ sphinx.ext.mathbase ~~~~~~~~~~~~~~~~~~~ Set up math support in source files and LaTeX/text output. :copyright: Copyright 2007-2009 by the Sphinx team, see AUTHORS. :license: BSD, see LICENSE for details. """ from docutils import nodes, utils from docutils.parsers.rst import directives class math(nodes.Inline, nodes.TextElement): pass class displaymath(nodes.Part, nodes.Element): pass class eqref(nodes.Inline, nodes.TextElement): pass def wrap_displaymath(math, label): parts = math.split('\n\n') ret = [] for i, part in enumerate(parts): if label is not None and i == 0: ret.append('\\begin{split}%s\\end{split}' % part + (label and '\\label{'+label+'}' or '')) else: ret.append('\\begin{split}%s\\end{split}\\notag' % part) return '\\begin{gather}\n' + '\\\\'.join(ret) + '\n\\end{gather}' def math_role(role, rawtext, text, lineno, inliner, options={}, content=[]): latex = utils.unescape(text, restore_backslashes=True) return [math(latex=latex)], [] def eq_role(role, rawtext, text, lineno, inliner, options={}, content=[]): text = utils.unescape(text) node = eqref('(?)', '(?)', target=text) node['docname'] = inliner.document.settings.env.docname return [node], [] def math_directive(name, arguments, options, content, lineno, content_offset, block_text, state, state_machine): latex = '\n'.join(content) if arguments and arguments[0]: latex = arguments[0] + '\n\n' + latex node = displaymath() node['latex'] = latex node['label'] = options.get('label', None) node['nowrap'] = 'nowrap' in options node['docname'] = state.document.settings.env.docname ret = [node] if node['label']: tnode = nodes.target('', '', ids=['equation-' + node['label']]) state.document.note_explicit_target(tnode) ret.insert(0, tnode) return ret def latex_visit_math(self, node): self.body.append('$' + node['latex'] + '$') raise nodes.SkipNode def latex_visit_displaymath(self, node): if node['nowrap']: self.body.append(node['latex']) else: label = node['label'] and node['docname'] + '-' + node['label'] or None self.body.append(wrap_displaymath(node['latex'], label)) raise nodes.SkipNode def latex_visit_eqref(self, node): self.body.append('\\eqref{%s-%s}' % (node['docname'], node['target'])) raise nodes.SkipNode def text_visit_math(self, node): self.add_text(node['latex']) raise nodes.SkipNode def text_visit_displaymath(self, node): self.new_state() self.add_text(node['latex']) self.end_state() raise nodes.SkipNode def text_visit_eqref(self, node): self.add_text(node['target']) raise nodes.SkipNode def html_visit_eqref(self, node): self.body.append('' % node['target']) def html_depart_eqref(self, node): self.body.append('') def number_equations(app, doctree, docname): num = 0 numbers = {} for node in doctree.traverse(displaymath): if node['label'] is not None: num += 1 node['number'] = num numbers[node['label']] = num else: node['number'] = None for node in doctree.traverse(eqref): if node['target'] not in numbers: continue num = '(%d)' % numbers[node['target']] node[0] = nodes.Text(num, num) def setup(app, htmlinlinevisitors, htmldisplayvisitors): app.add_node(math, latex=(latex_visit_math, None), text=(text_visit_math, None), html=htmlinlinevisitors) app.add_node(displaymath, latex=(latex_visit_displaymath, None), text=(text_visit_displaymath, None), html=htmldisplayvisitors) app.add_node(eqref, latex=(latex_visit_eqref, None), text=(text_visit_eqref, None), html=(html_visit_eqref, html_depart_eqref)) app.add_role('math', math_role) app.add_role('eq', eq_role) app.add_directive('math', math_directive, 1, (0, 1, 1), label=directives.unchanged, nowrap=directives.flag) app.connect('doctree-resolved', number_equations)
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