pngmath.py 文件源码

def html_visit_displaymath(self, node):
    if node['nowrap']:
        latex = node['latex']
    else:
        latex = wrap_displaymath(node['latex'], None)
    try:
        fname, depth = render_math(self, latex)
    except MathExtError as exc:
        sm = nodes.system_message(str(exc), type='WARNING', level=2,
                                  backrefs=[], source=node['latex'])
        sm.walkabout(self)
        self.builder.warn('inline latex %r: ' % node['latex'] + str(exc))
        raise nodes.SkipNode
    self.body.append(self.starttag(node, 'div', CLASS='math'))
    self.body.append('<p>')
    if node['number']:
        self.body.append('<span class="eqno">(%s)</span>' % node['number'])
    if fname is None:
        # something failed -- use text-only as a bad substitute
        self.body.append('<span class="math">%s</span></p>\n</div>' %
                         self.encode(node['latex']).strip())
    else:
        self.body.append(('<img src="%s"' % fname) + get_tooltip(self, node) +
                         '/></p>\n</div>')
    raise nodes.SkipNode