pngmath.py 文件源码

def html_visit_math(self, node):
    try:
        fname, depth = render_math(self, '$'+node['latex']+'$')
    except MathExtError as exc:
        msg = text_type(exc)
        sm = nodes.system_message(msg, type='WARNING', level=2,
                                  backrefs=[], source=node['latex'])
        sm.walkabout(self)
        self.builder.warn('display latex %r: ' % node['latex'] + msg)
        raise nodes.SkipNode
    if fname is None:
        # something failed -- use text-only as a bad substitute
        self.body.append('<span class="math">%s</span>' %
                         self.encode(node['latex']).strip())
    else:
        c = ('<img class="math" src="%s"' % fname) + get_tooltip(self, node)
        if depth is not None:
            c += ' style="vertical-align: %dpx"' % (-depth)
        self.body.append(c + '/>')
    raise nodes.SkipNode