X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/fc6cea0f0e0f6da99fffbedbfcf3d50cc0e641a4..a91eb73064c9bef76c3a961ab662bb5f75a1543d:/src/black/lines.py diff --git a/src/black/lines.py b/src/black/lines.py index 329dfc4..71b657a 100644 --- a/src/black/lines.py +++ b/src/black/lines.py @@ -28,11 +28,13 @@ from black.nodes import ( is_multiline_string, is_one_sequence_between, is_type_comment, + is_type_ignore_comment, is_with_or_async_with_stmt, replace_child, syms, whitespace, ) +from black.strings import str_width from blib2to3.pgen2 import token from blib2to3.pytree import Leaf, Node @@ -47,7 +49,7 @@ LN = Union[Leaf, Node] class Line: """Holds leaves and comments. Can be printed with `str(line)`.""" - mode: Mode + mode: Mode = field(repr=False) depth: int = 0 leaves: List[Leaf] = field(default_factory=list) # keys ordered like `leaves` @@ -79,7 +81,9 @@ class Line: # Note: at this point leaf.prefix should be empty except for # imports, for which we only preserve newlines. leaf.prefix += whitespace( - leaf, complex_subscript=self.is_complex_subscript(leaf) + leaf, + complex_subscript=self.is_complex_subscript(leaf), + mode=self.mode, ) if self.inside_brackets or not preformatted or track_bracket: self.bracket_tracker.mark(leaf) @@ -163,6 +167,13 @@ class Line: and second_leaf.value == "def" ) + @property + def is_stub_def(self) -> bool: + """Is this line a function definition with a body consisting only of "..."?""" + return self.is_def and self.leaves[-4:] == [Leaf(token.COLON, ":")] + [ + Leaf(token.DOT, ".") for _ in range(3) + ] + @property def is_class_paren_empty(self) -> bool: """Is this a class with no base classes but using parentheses? @@ -195,6 +206,26 @@ class Line: return False return self.leaves[-1].type == token.COLON + def is_fmt_pass_converted( + self, *, first_leaf_matches: Optional[Callable[[Leaf], bool]] = None + ) -> bool: + """Is this line converted from fmt off/skip code? + + If first_leaf_matches is not None, it only returns True if the first + leaf of converted code matches. + """ + if len(self.leaves) != 1: + return False + leaf = self.leaves[0] + if ( + leaf.type != STANDALONE_COMMENT + or leaf.fmt_pass_converted_first_leaf is None + ): + return False + return first_leaf_matches is None or first_leaf_matches( + leaf.fmt_pass_converted_first_leaf + ) + def contains_standalone_comments(self, depth_limit: int = sys.maxsize) -> bool: """If so, needs to be split before emitting.""" for leaf in self.leaves: @@ -230,7 +261,7 @@ class Line: for comment in comments: if is_type_comment(comment): if comment_seen or ( - not is_type_comment(comment, " ignore") + not is_type_ignore_comment(comment) and leaf_id not in ignored_ids ): return True @@ -267,7 +298,7 @@ class Line: # line. for node in self.leaves[-2:]: for comment in self.comments.get(id(node), []): - if is_type_comment(comment, " ignore"): + if is_type_ignore_comment(comment): return True return False @@ -501,7 +532,7 @@ class EmptyLineTracker: mode: Mode previous_line: Optional[Line] = None previous_block: Optional[LinesBlock] = None - previous_defs: List[int] = field(default_factory=list) + previous_defs: List[Line] = field(default_factory=list) semantic_leading_comment: Optional[LinesBlock] = None def maybe_empty_lines(self, current_line: Line) -> LinesBlock: @@ -556,13 +587,26 @@ class EmptyLineTracker: first_leaf.prefix = "" else: before = 0 + + user_had_newline = bool(before) depth = current_line.depth - while self.previous_defs and self.previous_defs[-1] >= depth: + + previous_def = None + while self.previous_defs and self.previous_defs[-1].depth >= depth: + previous_def = self.previous_defs.pop() + + if previous_def is not None: + assert self.previous_line is not None if self.mode.is_pyi: - assert self.previous_line is not None if depth and not current_line.is_def and self.previous_line.is_def: # Empty lines between attributes and methods should be preserved. - before = min(1, before) + before = 1 if user_had_newline else 0 + elif ( + Preview.blank_line_after_nested_stub_class in self.mode + and previous_def.is_class + and not previous_def.is_stub_class + ): + before = 1 elif depth: before = 0 else: @@ -572,7 +616,7 @@ class EmptyLineTracker: before = 1 elif ( not depth - and self.previous_defs[-1] + and previous_def.depth and current_line.leaves[-1].type == token.COLON and ( current_line.leaves[0].value @@ -589,14 +633,17 @@ class EmptyLineTracker: before = 1 else: before = 2 - self.previous_defs.pop() + if current_line.is_decorator or current_line.is_def or current_line.is_class: - return self._maybe_empty_lines_for_class_or_def(current_line, before) + return self._maybe_empty_lines_for_class_or_def( + current_line, before, user_had_newline + ) if ( self.previous_line and self.previous_line.is_import and not current_line.is_import + and not current_line.is_fmt_pass_converted(first_leaf_matches=is_import) and depth == self.previous_line.depth ): return (before or 1), 0 @@ -606,17 +653,19 @@ class EmptyLineTracker: and self.previous_line.is_class and current_line.is_triple_quoted_string ): + if Preview.no_blank_line_before_class_docstring in current_line.mode: + return 0, 1 return before, 1 if self.previous_line and self.previous_line.opens_block: return 0, 0 return before, 0 - def _maybe_empty_lines_for_class_or_def( - self, current_line: Line, before: int + def _maybe_empty_lines_for_class_or_def( # noqa: C901 + self, current_line: Line, before: int, user_had_newline: bool ) -> Tuple[int, int]: if not current_line.is_decorator: - self.previous_defs.append(current_line.depth) + self.previous_defs.append(current_line) if self.previous_line is None: # Don't insert empty lines before the first line in the file. return 0, 0 @@ -662,6 +711,17 @@ class EmptyLineTracker: newlines = 0 else: newlines = 1 + # Remove case `self.previous_line.depth > current_line.depth` below when + # this becomes stable. + # + # Don't inspect the previous line if it's part of the body of the previous + # statement in the same level, we always want a blank line if there's + # something with a body preceding. + elif ( + Preview.blank_line_between_nested_and_def_stub_file in current_line.mode + and self.previous_line.depth > current_line.depth + ): + newlines = 1 elif ( current_line.is_def or current_line.is_decorator ) and not self.previous_line.is_def: @@ -679,6 +739,14 @@ class EmptyLineTracker: newlines = 0 else: newlines = 1 if current_line.depth else 2 + # If a user has left no space after a dummy implementation, don't insert + # new lines. This is useful for instance for @overload or Protocols. + if ( + Preview.dummy_implementations in self.mode + and self.previous_line.is_stub_def + and not user_had_newline + ): + newlines = 0 if comment_to_add_newlines is not None: previous_block = comment_to_add_newlines.previous_block if previous_block is not None: @@ -732,9 +800,11 @@ def is_line_short_enough( # noqa: C901 if not line_str: line_str = line_to_string(line) + width = str_width if mode.preview else len + if Preview.multiline_string_handling not in mode: return ( - len(line_str) <= mode.line_length + width(line_str) <= mode.line_length and "\n" not in line_str # multiline strings and not line.contains_standalone_comments() ) @@ -743,10 +813,10 @@ def is_line_short_enough( # noqa: C901 return False if "\n" not in line_str: # No multiline strings (MLS) present - return len(line_str) <= mode.line_length + return width(line_str) <= mode.line_length first, *_, last = line_str.split("\n") - if len(first) > mode.line_length or len(last) > mode.line_length: + if width(first) > mode.line_length or width(last) > mode.line_length: return False # Traverse the AST to examine the context of the multiline string (MLS), @@ -760,7 +830,7 @@ def is_line_short_enough( # noqa: C901 # store the leaves that contain parts of the MLS multiline_string_contexts: List[LN] = [] - max_level_to_update = math.inf # track the depth of the MLS + max_level_to_update: Union[int, float] = math.inf # track the depth of the MLS for i, leaf in enumerate(line.leaves): if max_level_to_update == math.inf: had_comma: Optional[int] = None