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"""
Abstract syntax tree renderer for mistletoe.
"""
import json
from mistletoe.base_renderer import BaseRenderer
class AstRenderer(BaseRenderer):
def render(self, token):
"""
Returns the string representation of the AST.
Overrides super().render. Delegates the logic to get_ast.
"""
return json.dumps(get_ast(token), indent=2) + '\n'
def __getattr__(self, name):
return lambda token: ''
def get_ast(token):
"""
Recursively unrolls token attributes into dictionaries (token.children
into lists).
Returns:
a dictionary of token's attributes.
"""
node = {}
# Python 3.6 uses [ordered dicts] [1].
# Put in 'type' entry first to make the final tree format somewhat
# similar to [MDAST] [2].
#
# [1]: https://docs.python.org/3/whatsnew/3.6.html
# [2]: https://github.com/syntax-tree/mdast
node['type'] = token.__class__.__name__
for attrname in ['content', 'footnotes']:
if attrname in vars(token):
node[attrname] = getattr(token, attrname)
for attrname in token.repr_attributes:
node[attrname] = getattr(token, attrname)
if 'header' in vars(token):
node['header'] = get_ast(getattr(token, 'header'))
if token.children is not None:
node['children'] = [get_ast(child) for child in token.children]
return node
ASTRenderer = AstRenderer
"""
Deprecated name of the `AstRenderer` class.
"""
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