)
from black.brackets import DOT_PRIORITY, BracketTracker
-from black.mode import Mode, Preview
+from black.mode import Mode
from black.nodes import (
BRACKETS,
CLOSING_BRACKETS,
should_split_rhs: bool = False
magic_trailing_comma: Optional[Leaf] = None
- def append(self, leaf: Leaf, preformatted: bool = False) -> None:
+ def append(
+ self, leaf: Leaf, preformatted: bool = False, track_bracket: bool = False
+ ) -> None:
"""Add a new `leaf` to the end of the line.
Unless `preformatted` is True, the `leaf` will receive a new consistent
leaf.prefix += whitespace(
leaf, complex_subscript=self.is_complex_subscript(leaf)
)
- if self.inside_brackets or not preformatted:
+ if self.inside_brackets or not preformatted or track_bracket:
self.bracket_tracker.mark(leaf)
if self.mode.magic_trailing_comma:
if self.has_magic_trailing_comma(leaf):
- it's not a single-element subscript
Additionally, if ensure_removable:
- it's not from square bracket indexing
- (specifically, single-element square bracket indexing with
- Preview.skip_magic_trailing_comma_in_subscript)
+ (specifically, single-element square bracket indexing)
"""
if not (
closing.type in CLOSING_BRACKETS
if closing.type == token.RSQB:
if (
- Preview.one_element_subscript in self.mode
- and closing.parent
+ closing.parent
and closing.parent.type == syms.trailer
and closing.opening_bracket
and is_one_sequence_between(
comma = self.leaves[-1]
if comma.parent is None:
return False
- if Preview.skip_magic_trailing_comma_in_subscript in self.mode:
- return (
- comma.parent.type != syms.subscriptlist
- or closing.opening_bracket is None
- or not is_one_sequence_between(
- closing.opening_bracket,
- closing,
- self.leaves,
- brackets=(token.LSQB, token.RSQB),
- )
+ return (
+ comma.parent.type != syms.subscriptlist
+ or closing.opening_bracket is None
+ or not is_one_sequence_between(
+ closing.opening_bracket,
+ closing,
+ self.leaves,
+ brackets=(token.LSQB, token.RSQB),
)
- return comma.parent.type == syms.listmaker
+ )
if self.is_import:
return True
return bool(self.leaves or self.comments)
+@dataclass
+class LinesBlock:
+ """Class that holds information about a block of formatted lines.
+
+ This is introduced so that the EmptyLineTracker can look behind the standalone
+ comments and adjust their empty lines for class or def lines.
+ """
+
+ mode: Mode
+ previous_block: Optional["LinesBlock"]
+ original_line: Line
+ before: int = 0
+ content_lines: List[str] = field(default_factory=list)
+ after: int = 0
+
+ def all_lines(self) -> List[str]:
+ empty_line = str(Line(mode=self.mode))
+ return (
+ [empty_line * self.before] + self.content_lines + [empty_line * self.after]
+ )
+
+
@dataclass
class EmptyLineTracker:
"""Provides a stateful method that returns the number of potential extra
are consumed by `maybe_empty_lines()` and included in the computation.
"""
- is_pyi: bool = False
+ mode: Mode
previous_line: Optional[Line] = None
- previous_after: int = 0
+ previous_block: Optional[LinesBlock] = None
previous_defs: List[int] = field(default_factory=list)
+ semantic_leading_comment: Optional[LinesBlock] = None
- def maybe_empty_lines(self, current_line: Line) -> Tuple[int, int]:
+ def maybe_empty_lines(self, current_line: Line) -> LinesBlock:
"""Return the number of extra empty lines before and after the `current_line`.
This is for separating `def`, `async def` and `class` with extra empty
lines (two on module-level).
"""
before, after = self._maybe_empty_lines(current_line)
+ previous_after = self.previous_block.after if self.previous_block else 0
before = (
# Black should not insert empty lines at the beginning
# of the file
0
if self.previous_line is None
- else before - self.previous_after
+ else before - previous_after
+ )
+ block = LinesBlock(
+ mode=self.mode,
+ previous_block=self.previous_block,
+ original_line=current_line,
+ before=before,
+ after=after,
)
- self.previous_after = after
+
+ # Maintain the semantic_leading_comment state.
+ if current_line.is_comment:
+ if self.previous_line is None or (
+ not self.previous_line.is_decorator
+ # `or before` means this comment already has an empty line before
+ and (not self.previous_line.is_comment or before)
+ and (self.semantic_leading_comment is None or before)
+ ):
+ self.semantic_leading_comment = block
+ # `or before` means this decorator already has an empty line before
+ elif not current_line.is_decorator or before:
+ self.semantic_leading_comment = None
+
self.previous_line = current_line
- return before, after
+ self.previous_block = block
+ return block
def _maybe_empty_lines(self, current_line: Line) -> Tuple[int, int]:
max_allowed = 1
if current_line.depth == 0:
- max_allowed = 1 if self.is_pyi else 2
+ max_allowed = 1 if self.mode.is_pyi else 2
if current_line.leaves:
# Consume the first leaf's extra newlines.
first_leaf = current_line.leaves[0]
before = 0
depth = current_line.depth
while self.previous_defs and self.previous_defs[-1] >= depth:
- if self.is_pyi:
+ 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.
):
return before, 1
- if (
- Preview.remove_block_trailing_newline in current_line.mode
- and self.previous_line
- and self.previous_line.opens_block
- ):
+ if self.previous_line and self.previous_line.opens_block:
return 0, 0
return before, 0
return 0, 0
if self.previous_line.is_decorator:
- if self.is_pyi and current_line.is_stub_class:
+ if self.mode.is_pyi and current_line.is_stub_class:
# Insert an empty line after a decorated stub class
return 0, 1
):
return 0, 0
+ comment_to_add_newlines: Optional[LinesBlock] = None
if (
self.previous_line.is_comment
and self.previous_line.depth == current_line.depth
and before == 0
):
- return 0, 0
+ slc = self.semantic_leading_comment
+ if (
+ slc is not None
+ and slc.previous_block is not None
+ and not slc.previous_block.original_line.is_class
+ and not slc.previous_block.original_line.opens_block
+ and slc.before <= 1
+ ):
+ comment_to_add_newlines = slc
+ else:
+ return 0, 0
- if self.is_pyi:
+ if self.mode.is_pyi:
if current_line.is_class or self.previous_line.is_class:
if self.previous_line.depth < current_line.depth:
newlines = 0
newlines = 0
else:
newlines = 1 if current_line.depth else 2
+ if comment_to_add_newlines is not None:
+ previous_block = comment_to_add_newlines.previous_block
+ if previous_block is not None:
+ comment_to_add_newlines.before = (
+ max(comment_to_add_newlines.before, newlines) - previous_block.after
+ )
+ newlines = 0
return newlines, 0
projects / etc / vim.git / blobdiff