X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/ff53fc1b97b98075f92fcc954ed81b9252e7c9c1..35722dff623f3cdf5018e3f1183cd4e02e91caa8:/src/black/trans.py diff --git a/src/black/trans.py b/src/black/trans.py index a6a416e..1e28ed0 100644 --- a/src/black/trans.py +++ b/src/black/trans.py @@ -48,9 +48,11 @@ from black.nodes import ( from black.rusty import Err, Ok, Result from black.strings import ( assert_is_leaf_string, + count_chars_in_width, get_string_prefix, has_triple_quotes, normalize_string_quotes, + str_width, ) from blib2to3.pgen2 import token from blib2to3.pytree import Leaf, Node @@ -71,6 +73,8 @@ StringID = int TResult = Result[T, CannotTransform] # (T)ransform Result TMatchResult = TResult[List[Index]] +SPLIT_SAFE_CHARS = frozenset(["\u3001", "\u3002", "\uff0c"]) # East Asian stops + def TErr(err_msg: str) -> Err[CannotTransform]: """(T)ransform Err @@ -1164,7 +1168,7 @@ class BaseStringSplitter(StringTransformer): # WMA4 the length of the inline comment. offset += len(comment_leaf.value) - max_string_length = self.line_length - offset + max_string_length = count_chars_in_width(str(line), self.line_length - offset) return max_string_length @staticmethod @@ -1182,19 +1186,33 @@ class BaseStringSplitter(StringTransformer): if LL[0].type != token.STRING: return None - # If the string is surrounded by commas (or is the first/last child)... - prev_sibling = LL[0].prev_sibling - next_sibling = LL[0].next_sibling - if not prev_sibling and not next_sibling and parent_type(LL[0]) == syms.atom: - # If it's an atom string, we need to check the parent atom's siblings. - parent = LL[0].parent - assert parent is not None # For type checkers. - prev_sibling = parent.prev_sibling - next_sibling = parent.next_sibling - if (not prev_sibling or prev_sibling.type == token.COMMA) and ( - not next_sibling or next_sibling.type == token.COMMA + matching_nodes = [ + syms.listmaker, + syms.dictsetmaker, + syms.testlist_gexp, + ] + # If the string is an immediate child of a list/set/tuple literal... + if ( + parent_type(LL[0]) in matching_nodes + or parent_type(LL[0].parent) in matching_nodes ): - return 0 + # And the string is surrounded by commas (or is the first/last child)... + prev_sibling = LL[0].prev_sibling + next_sibling = LL[0].next_sibling + if ( + not prev_sibling + and not next_sibling + and parent_type(LL[0]) == syms.atom + ): + # If it's an atom string, we need to check the parent atom's siblings. + parent = LL[0].parent + assert parent is not None # For type checkers. + prev_sibling = parent.prev_sibling + next_sibling = parent.next_sibling + if (not prev_sibling or prev_sibling.type == token.COMMA) and ( + not next_sibling or next_sibling.type == token.COMMA + ): + return 0 return None @@ -1419,11 +1437,13 @@ class StringSplitter(BaseStringSplitter, CustomSplitMapMixin): is_valid_index(string_idx + 1) and LL[string_idx + 1].type == token.COMMA ) - def max_last_string() -> int: + def max_last_string_column() -> int: """ Returns: - The max allowed length of the string value used for the last - line we will construct. + The max allowed width of the string value used for the last + line we will construct. Note that this value means the width + rather than the number of characters (e.g., many East Asian + characters expand to two columns). """ result = self.line_length result -= line.depth * 4 @@ -1431,14 +1451,14 @@ class StringSplitter(BaseStringSplitter, CustomSplitMapMixin): result -= string_op_leaves_length return result - # --- Calculate Max Break Index (for string value) + # --- Calculate Max Break Width (for string value) # We start with the line length limit - max_break_idx = self.line_length + max_break_width = self.line_length # The last index of a string of length N is N-1. - max_break_idx -= 1 + max_break_width -= 1 # Leading whitespace is not present in the string value (e.g. Leaf.value). - max_break_idx -= line.depth * 4 - if max_break_idx < 0: + max_break_width -= line.depth * 4 + if max_break_width < 0: yield TErr( f"Unable to split {LL[string_idx].value} at such high of a line depth:" f" {line.depth}" @@ -1451,7 +1471,7 @@ class StringSplitter(BaseStringSplitter, CustomSplitMapMixin): # line limit. use_custom_breakpoints = bool( custom_splits - and all(csplit.break_idx <= max_break_idx for csplit in custom_splits) + and all(csplit.break_idx <= max_break_width for csplit in custom_splits) ) # Temporary storage for the remaining chunk of the string line that @@ -1467,7 +1487,7 @@ class StringSplitter(BaseStringSplitter, CustomSplitMapMixin): if use_custom_breakpoints: return len(custom_splits) > 1 else: - return len(rest_value) > max_last_string() + return str_width(rest_value) > max_last_string_column() string_line_results: List[Ok[Line]] = [] while more_splits_should_be_made(): @@ -1477,7 +1497,10 @@ class StringSplitter(BaseStringSplitter, CustomSplitMapMixin): break_idx = csplit.break_idx else: # Algorithmic Split (automatic) - max_bidx = max_break_idx - string_op_leaves_length + max_bidx = ( + count_chars_in_width(rest_value, max_break_width) + - string_op_leaves_length + ) maybe_break_idx = self._get_break_idx(rest_value, max_bidx) if maybe_break_idx is None: # If we are unable to algorithmically determine a good split @@ -1574,7 +1597,7 @@ class StringSplitter(BaseStringSplitter, CustomSplitMapMixin): # Try to fit them all on the same line with the last substring... if ( - len(temp_value) <= max_last_string() + str_width(temp_value) <= max_last_string_column() or LL[string_idx + 1].type == token.COMMA ): last_line.append(rest_leaf) @@ -1694,6 +1717,7 @@ class StringSplitter(BaseStringSplitter, CustomSplitMapMixin): section of this classes' docstring would be be met by returning @i. """ is_space = string[i] == " " + is_split_safe = is_valid_index(i - 1) and string[i - 1] in SPLIT_SAFE_CHARS is_not_escaped = True j = i - 1 @@ -1706,7 +1730,7 @@ class StringSplitter(BaseStringSplitter, CustomSplitMapMixin): and len(string[:i]) >= self.MIN_SUBSTR_SIZE ) return ( - is_space + (is_space or is_split_safe) and is_not_escaped and is_big_enough and not breaks_unsplittable_expression(i) @@ -1801,8 +1825,9 @@ class StringParenWrapper(BaseStringSplitter, CustomSplitMapMixin): * The line is an lambda expression and the value is a string. OR * The line starts with an "atom" string that prefers to be wrapped in - parens. It's preferred to be wrapped when the string is surrounded by - commas (or is the first/last child). + parens. It's preferred to be wrapped when it's is an immediate child of + a list/set/tuple literal, AND the string is surrounded by commas (or is + the first/last child). Transformations: The chosen string is wrapped in parentheses and then split at the LPAR. @@ -1851,11 +1876,13 @@ class StringParenWrapper(BaseStringSplitter, CustomSplitMapMixin): if string_idx is not None: string_value = line.leaves[string_idx].value - # If the string has no spaces... - if " " not in string_value: + # If the string has neither spaces nor East Asian stops... + if not any( + char == " " or char in SPLIT_SAFE_CHARS for char in string_value + ): # And will still violate the line length limit when split... - max_string_length = self.line_length - ((line.depth + 1) * 4) - if len(string_value) > max_string_length: + max_string_width = self.line_length - ((line.depth + 1) * 4) + if str_width(string_value) > max_string_width: # And has no associated custom splits... if not self.has_custom_splits(string_value): # Then we should NOT put this string on its own line.