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import traceback
from io import StringIO
import yaml
from docutils.core import publish_string
from docutils.frontend import filter_settings_spec
from docutils.writers.html5_polyglot import HTMLTranslator, Writer
from js import document
from myst_parser import __version__
from myst_parser.parsers.docutils_ import Parser
class SimpleTranslator(HTMLTranslator):
def visit_literal_block(self, node):
node["classes"].append("highlight")
return super().visit_literal_block(node)
def stylesheet_call(self, *args, **kwargs):
return ""
class SimpleWriter(Writer):
settings_spec = filter_settings_spec(
Writer.settings_spec,
"template",
)
def apply_template(self):
subs = self.interpolation_dict()
return "{body}\n".format(**subs)
def __init__(self):
self.parts = {}
self.translator_class = SimpleTranslator
def convert(input_config: str, input_myst: str, writer_name: str) -> dict:
warning_stream = StringIO()
try:
settings = yaml.safe_load(input_config) if input_config else {}
assert isinstance(settings, dict), "not a dictionary"
except Exception as exc:
warning_stream.write(f"ERROR: config load: {exc}\n")
settings = {}
settings.update(
{
"output_encoding": "unicode",
"warning_stream": warning_stream,
# to mimic the sphinx parser
"doctitle_xform": False,
"sectsubtitle_xform": False,
"initial_header_level": 1,
}
)
try:
output = publish_string(
input_myst,
parser=Parser(),
settings_overrides=settings,
**(
{"writer": SimpleWriter()}
if "html" in writer_name
else {"writer_name": writer_name}
),
)
except Exception as exc:
output = f"ERROR: conversion:\n{exc}\n{traceback.format_exc()}"
return {"output": output, "warnings": warning_stream.getvalue()}
version_label = document.querySelector("span#myst-version")
config_textarea = document.querySelector("textarea#input_config")
input_textarea = document.querySelector("textarea#input_myst")
output_iframe = document.querySelector("div#output_html")
output_raw = document.querySelector("textarea#output_raw")
warnings_textarea = document.querySelector("textarea#output_warnings")
oformat_select = document.querySelector("select#output_format")
def do_convert(event=None):
result = convert(config_textarea.value, input_textarea.value, oformat_select.value)
output_raw.value = result["output"]
if "html" in oformat_select.value:
output_iframe.innerHTML = result["output"]
else:
output_iframe.innerHTML = "Change output format to HTML to see output"
warnings_textarea.value = result["warnings"]
version_label.textContent = f"myst-parser v{__version__}"
config_textarea.oninput = do_convert
input_textarea.oninput = do_convert
oformat_select.onchange = do_convert
do_convert()
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