graphviz.py 文件源码

def run(self):
        if self.arguments:
            document = self.state.document
            if self.content:
                return [document.reporter.warning(
                    'Graphviz directive cannot have both content and '
                    'a filename argument', line=self.lineno)]
            env = self.state.document.settings.env
            rel_filename, filename = env.relfn2path(self.arguments[0])
            env.note_dependency(rel_filename)
            try:
                fp = codecs.open(filename, 'r', 'utf-8')
                try:
                    dotcode = fp.read()
                finally:
                    fp.close()
            except (IOError, OSError):
                return [document.reporter.warning(
                    'External Graphviz file %r not found or reading '
                    'it failed' % filename, line=self.lineno)]
        else:
            dotcode = '\n'.join(self.content)
            if not dotcode.strip():
                return [self.state_machine.reporter.warning(
                    'Ignoring "graphviz" directive without content.',
                    line=self.lineno)]
        node = graphviz()
        node['code'] = dotcode
        node['options'] = []
        if 'alt' in self.options:
            node['alt'] = self.options['alt']
        node['inline'] = 'inline' in self.options

        caption = self.options.get('caption')
        if caption and not node['inline']:
            node = figure_wrapper(self, node, caption)

        return [node]