X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/dba3c2695c59fdb11825dbdf8f3b0ab6e0b368b2..213cb655188fd56c548be3f0d9191c30595407ca:/src/black/lines.py diff --git a/src/black/lines.py b/src/black/lines.py index fb5933e..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? @@ -250,7 +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 @@ -287,7 +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 @@ -576,17 +587,24 @@ class EmptyLineTracker: first_leaf.prefix = "" else: before = 0 + + user_had_newline = bool(before) depth = current_line.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 self.previous_defs[-1].is_class - and not self.previous_defs[-1].is_stub_class + and previous_def.is_class + and not previous_def.is_stub_class ): before = 1 elif depth: @@ -598,7 +616,7 @@ class EmptyLineTracker: before = 1 elif ( not depth - and self.previous_defs[-1].depth + and previous_def.depth and current_line.leaves[-1].type == token.COLON and ( current_line.leaves[0].value @@ -615,9 +633,11 @@ 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 @@ -633,14 +653,16 @@ 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) @@ -689,6 +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: @@ -706,6 +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: @@ -759,9 +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() ) @@ -770,10 +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), @@ -787,7 +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