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author | cyfraeviolae <cyfraeviolae> | 2024-04-03 03:10:44 -0400 |
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committer | cyfraeviolae <cyfraeviolae> | 2024-04-03 03:10:44 -0400 |
commit | 6d7ba58f880be618ade07f8ea080fe8c4bf8a896 (patch) | |
tree | b1c931051ffcebd2bd9d61d98d6233ffa289bbce /venv/lib/python3.11/site-packages/rich/markup.py | |
parent | 4f884c9abc32990b4061a1bb6997b4b37e58ea0b (diff) |
venv
Diffstat (limited to 'venv/lib/python3.11/site-packages/rich/markup.py')
-rw-r--r-- | venv/lib/python3.11/site-packages/rich/markup.py | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/venv/lib/python3.11/site-packages/rich/markup.py b/venv/lib/python3.11/site-packages/rich/markup.py new file mode 100644 index 0000000..bd9c05a --- /dev/null +++ b/venv/lib/python3.11/site-packages/rich/markup.py @@ -0,0 +1,251 @@ +import re +from ast import literal_eval +from operator import attrgetter +from typing import Callable, Iterable, List, Match, NamedTuple, Optional, Tuple, Union + +from ._emoji_replace import _emoji_replace +from .emoji import EmojiVariant +from .errors import MarkupError +from .style import Style +from .text import Span, Text + +RE_TAGS = re.compile( + r"""((\\*)\[([a-z#/@][^[]*?)])""", + re.VERBOSE, +) + +RE_HANDLER = re.compile(r"^([\w.]*?)(\(.*?\))?$") + + +class Tag(NamedTuple): + """A tag in console markup.""" + + name: str + """The tag name. e.g. 'bold'.""" + parameters: Optional[str] + """Any additional parameters after the name.""" + + def __str__(self) -> str: + return ( + self.name if self.parameters is None else f"{self.name} {self.parameters}" + ) + + @property + def markup(self) -> str: + """Get the string representation of this tag.""" + return ( + f"[{self.name}]" + if self.parameters is None + else f"[{self.name}={self.parameters}]" + ) + + +_ReStringMatch = Match[str] # regex match object +_ReSubCallable = Callable[[_ReStringMatch], str] # Callable invoked by re.sub +_EscapeSubMethod = Callable[[_ReSubCallable, str], str] # Sub method of a compiled re + + +def escape( + markup: str, + _escape: _EscapeSubMethod = re.compile(r"(\\*)(\[[a-z#/@][^[]*?])").sub, +) -> str: + """Escapes text so that it won't be interpreted as markup. + + Args: + markup (str): Content to be inserted in to markup. + + Returns: + str: Markup with square brackets escaped. + """ + + def escape_backslashes(match: Match[str]) -> str: + """Called by re.sub replace matches.""" + backslashes, text = match.groups() + return f"{backslashes}{backslashes}\\{text}" + + markup = _escape(escape_backslashes, markup) + if markup.endswith("\\") and not markup.endswith("\\\\"): + return markup + "\\" + + return markup + + +def _parse(markup: str) -> Iterable[Tuple[int, Optional[str], Optional[Tag]]]: + """Parse markup in to an iterable of tuples of (position, text, tag). + + Args: + markup (str): A string containing console markup + + """ + position = 0 + _divmod = divmod + _Tag = Tag + for match in RE_TAGS.finditer(markup): + full_text, escapes, tag_text = match.groups() + start, end = match.span() + if start > position: + yield start, markup[position:start], None + if escapes: + backslashes, escaped = _divmod(len(escapes), 2) + if backslashes: + # Literal backslashes + yield start, "\\" * backslashes, None + start += backslashes * 2 + if escaped: + # Escape of tag + yield start, full_text[len(escapes) :], None + position = end + continue + text, equals, parameters = tag_text.partition("=") + yield start, None, _Tag(text, parameters if equals else None) + position = end + if position < len(markup): + yield position, markup[position:], None + + +def render( + markup: str, + style: Union[str, Style] = "", + emoji: bool = True, + emoji_variant: Optional[EmojiVariant] = None, +) -> Text: + """Render console markup in to a Text instance. + + Args: + markup (str): A string containing console markup. + style: (Union[str, Style]): The style to use. + emoji (bool, optional): Also render emoji code. Defaults to True. + emoji_variant (str, optional): Optional emoji variant, either "text" or "emoji". Defaults to None. + + + Raises: + MarkupError: If there is a syntax error in the markup. + + Returns: + Text: A test instance. + """ + emoji_replace = _emoji_replace + if "[" not in markup: + return Text( + emoji_replace(markup, default_variant=emoji_variant) if emoji else markup, + style=style, + ) + text = Text(style=style) + append = text.append + normalize = Style.normalize + + style_stack: List[Tuple[int, Tag]] = [] + pop = style_stack.pop + + spans: List[Span] = [] + append_span = spans.append + + _Span = Span + _Tag = Tag + + def pop_style(style_name: str) -> Tuple[int, Tag]: + """Pop tag matching given style name.""" + for index, (_, tag) in enumerate(reversed(style_stack), 1): + if tag.name == style_name: + return pop(-index) + raise KeyError(style_name) + + for position, plain_text, tag in _parse(markup): + if plain_text is not None: + # Handle open brace escapes, where the brace is not part of a tag. + plain_text = plain_text.replace("\\[", "[") + append(emoji_replace(plain_text) if emoji else plain_text) + elif tag is not None: + if tag.name.startswith("/"): # Closing tag + style_name = tag.name[1:].strip() + + if style_name: # explicit close + style_name = normalize(style_name) + try: + start, open_tag = pop_style(style_name) + except KeyError: + raise MarkupError( + f"closing tag '{tag.markup}' at position {position} doesn't match any open tag" + ) from None + else: # implicit close + try: + start, open_tag = pop() + except IndexError: + raise MarkupError( + f"closing tag '[/]' at position {position} has nothing to close" + ) from None + + if open_tag.name.startswith("@"): + if open_tag.parameters: + handler_name = "" + parameters = open_tag.parameters.strip() + handler_match = RE_HANDLER.match(parameters) + if handler_match is not None: + handler_name, match_parameters = handler_match.groups() + parameters = ( + "()" if match_parameters is None else match_parameters + ) + + try: + meta_params = literal_eval(parameters) + except SyntaxError as error: + raise MarkupError( + f"error parsing {parameters!r} in {open_tag.parameters!r}; {error.msg}" + ) + except Exception as error: + raise MarkupError( + f"error parsing {open_tag.parameters!r}; {error}" + ) from None + + if handler_name: + meta_params = ( + handler_name, + meta_params + if isinstance(meta_params, tuple) + else (meta_params,), + ) + + else: + meta_params = () + + append_span( + _Span( + start, len(text), Style(meta={open_tag.name: meta_params}) + ) + ) + else: + append_span(_Span(start, len(text), str(open_tag))) + + else: # Opening tag + normalized_tag = _Tag(normalize(tag.name), tag.parameters) + style_stack.append((len(text), normalized_tag)) + + text_length = len(text) + while style_stack: + start, tag = style_stack.pop() + style = str(tag) + if style: + append_span(_Span(start, text_length, style)) + + text.spans = sorted(spans[::-1], key=attrgetter("start")) + return text + + +if __name__ == "__main__": # pragma: no cover + MARKUP = [ + "[red]Hello World[/red]", + "[magenta]Hello [b]World[/b]", + "[bold]Bold[italic] bold and italic [/bold]italic[/italic]", + "Click [link=https://www.willmcgugan.com]here[/link] to visit my Blog", + ":warning-emoji: [bold red blink] DANGER![/]", + ] + + from rich import print + from rich.table import Table + + grid = Table("Markup", "Result", padding=(0, 1)) + + for markup in MARKUP: + grid.add_row(Text(markup), markup) + + print(grid) |