X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/4ebf14d17ed544be893be5706c02116fd8b83b4c..5d0d5936db2ed7a01c50a374e32753e1afe9cc71:/src/black/lines.py diff --git a/src/black/lines.py b/src/black/lines.py index 3062265..2aa675c 100644 --- a/src/black/lines.py +++ b/src/black/lines.py @@ -53,7 +53,9 @@ class Line: 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 @@ -75,7 +77,7 @@ class Line: 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): @@ -448,6 +450,28 @@ class Line: 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 @@ -458,33 +482,56 @@ class EmptyLineTracker: 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 ) - self.previous_after = after + block = LinesBlock( + mode=self.mode, + previous_block=self.previous_block, + original_line=current_line, + before=before, + 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] @@ -495,7 +542,7 @@ class EmptyLineTracker: 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. @@ -563,7 +610,7 @@ class EmptyLineTracker: 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 @@ -574,14 +621,27 @@ class EmptyLineTracker: ): 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 ( + Preview.empty_lines_before_class_or_def_with_leading_comments + in current_line.mode + and 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 @@ -609,6 +669,13 @@ class EmptyLineTracker: 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