def visit_kernel_render()

in sphinx/kfigure.py [0:0]

• 27 lines of code
• 5 McCabe index (conditional complexity)

def visit_kernel_render(self, node):
    """Visitor of the ``kernel_render`` Node.

    If rendering tools available, save the markup of the ``literal_block`` child
    node into a file and replace the ``literal_block`` node with a new created
    ``image`` node, pointing to the saved markup file. Afterwards, handle the
    image child-node with the ``convert_image(...)``.
    """
    app = self.builder.app
    srclang = node.get('srclang')

    kernellog.verbose(app, 'visit kernel-render node lang: "%s"' % (srclang))

    tmp_ext = RENDER_MARKUP_EXT.get(srclang, None)
    if tmp_ext is None:
        kernellog.warn(app, 'kernel-render: "%s" unknown / include raw.' % (srclang))
        return

    if not dot_cmd and tmp_ext == '.dot':
        kernellog.verbose(app, "dot from graphviz not available / include raw.")
        return

    literal_block = node[0]

    code      = literal_block.astext()
    hashobj   = code.encode('utf-8') #  str(node.attributes)
    fname     = path.join('%s-%s' % (srclang, sha1(hashobj).hexdigest()))

    tmp_fname = path.join(
        self.builder.outdir, self.builder.imagedir, fname + tmp_ext)

    if not path.isfile(tmp_fname):
        mkdir(path.dirname(tmp_fname))
        with open(tmp_fname, "w") as out:
            out.write(code)

    img_node = nodes.image(node.rawsource, **node.attributes)
    img_node['uri'] = path.join(self.builder.imgpath, fname + tmp_ext)
    img_node['candidates'] = {
        '*': path.join(self.builder.imgpath, fname + tmp_ext)}

    literal_block.replace_self(img_node)
    convert_image(img_node, self, tmp_fname)