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from parsimonious.grammar import Grammar
from parsimonious.exceptions import ParseError
from .html_path_reader import read_html_path, grammar_text as html_path_grammar, read_html_path_node
from .document_matcher_reader import read_document_matcher, grammar_text as document_matcher_grammar, read_document_matcher_node
from ..styles import Style
from .. import results
__all__ = ["read_style", "read_html_path", "read_document_matcher"]
def read_style(string):
try:
style_node = _grammar.parse(string)
except ParseError:
warning = "Did not understand this style mapping, so ignored it: " + string
return results.Result(None, [results.warning(warning)])
return results.success(_read_style_node(style_node))
def _read_style_node(style_node):
document_matcher_node = style_node.children[0]
html_path_node = style_node.children[4]
document_matcher = read_document_matcher_node(document_matcher_node)
html_path = read_html_path_node(html_path_node)
return Style(document_matcher, html_path)
_grammar = Grammar("""
style = document_matcher whitespace "=>" whitespace html_path
""" + html_path_grammar + document_matcher_grammar
)
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