Воркед

venv/Lib/site-packages/pip/_vendor/rich/cells.py

@@ -1,11 +1,33 @@
-import re
+from __future__ import annotations
+
 from functools import lru_cache
-from typing import Callable, List
+from typing import Callable
 
 from ._cell_widths import CELL_WIDTHS
 
-# Regex to match sequence of the most common character ranges
-_is_single_cell_widths = re.compile("^[\u0020-\u006f\u00a0\u02ff\u0370-\u0482]*$").match
+# Ranges of unicode ordinals that produce a 1-cell wide character
+# This is non-exhaustive, but covers most common Western characters
+_SINGLE_CELL_UNICODE_RANGES: list[tuple[int, int]] = [
+    (0x20, 0x7E),  # Latin (excluding non-printable)
+    (0xA0, 0xAC),
+    (0xAE, 0x002FF),
+    (0x00370, 0x00482),  # Greek / Cyrillic
+    (0x02500, 0x025FC),  # Box drawing, box elements, geometric shapes
+    (0x02800, 0x028FF),  # Braille
+]
+
+# A set of characters that are a single cell wide
+_SINGLE_CELLS = frozenset(
+    [
+        character
+        for _start, _end in _SINGLE_CELL_UNICODE_RANGES
+        for character in map(chr, range(_start, _end + 1))
+    ]
+)
+
+# When called with a string this will return True if all
+# characters are single-cell, otherwise False
+_is_single_cell_widths: Callable[[str], bool] = _SINGLE_CELLS.issuperset
 
 
 @lru_cache(4096)
@@ -21,9 +43,9 @@ def cached_cell_len(text: str) -> int:
     Returns:
         int: Get the number of cells required to display text.
     """
-    _get_size = get_character_cell_size
-    total_size = sum(_get_size(character) for character in text)
-    return total_size
+    if _is_single_cell_widths(text):
+        return len(text)
+    return sum(map(get_character_cell_size, text))
 
 
 def cell_len(text: str, _cell_len: Callable[[str], int] = cached_cell_len) -> int:
@@ -37,9 +59,9 @@ def cell_len(text: str, _cell_len: Callable[[str], int] = cached_cell_len) -> in
     """
     if len(text) < 512:
         return _cell_len(text)
-    _get_size = get_character_cell_size
-    total_size = sum(_get_size(character) for character in text)
-    return total_size
+    if _is_single_cell_widths(text):
+        return len(text)
+    return sum(map(get_character_cell_size, text))
 
 
 @lru_cache(maxsize=4096)
@@ -52,20 +74,7 @@ def get_character_cell_size(character: str) -> int:
     Returns:
         int: Number of cells (0, 1 or 2) occupied by that character.
     """
-    return _get_codepoint_cell_size(ord(character))
-
-
-@lru_cache(maxsize=4096)
-def _get_codepoint_cell_size(codepoint: int) -> int:
-    """Get the cell size of a character.
-
-    Args:
-        character (str): A single character.
-
-    Returns:
-        int: Number of cells (0, 1 or 2) occupied by that character.
-    """
-
+    codepoint = ord(character)
     _table = CELL_WIDTHS
     lower_bound = 0
     upper_bound = len(_table) - 1
@@ -119,33 +128,44 @@ def set_cell_size(text: str, total: int) -> str:
             start = pos
 
 
-# TODO: This is inefficient
-# TODO: This might not work with CWJ type characters
-def chop_cells(text: str, max_size: int, position: int = 0) -> List[str]:
-    """Break text in to equal (cell) length strings, returning the characters in reverse
-    order"""
-    _get_character_cell_size = get_character_cell_size
-    characters = [
-        (character, _get_character_cell_size(character)) for character in text
-    ]
-    total_size = position
-    lines: List[List[str]] = [[]]
-    append = lines[-1].append
+def chop_cells(
+    text: str,
+    width: int,
+) -> list[str]:
+    """Split text into lines such that each line fits within the available (cell) width.
 
-    for character, size in reversed(characters):
-        if total_size + size > max_size:
-            lines.append([character])
-            append = lines[-1].append
-            total_size = size
+    Args:
+        text: The text to fold such that it fits in the given width.
+        width: The width available (number of cells).
+
+    Returns:
+        A list of strings such that each string in the list has cell width
+        less than or equal to the available width.
+    """
+    _get_character_cell_size = get_character_cell_size
+    lines: list[list[str]] = [[]]
+
+    append_new_line = lines.append
+    append_to_last_line = lines[-1].append
+
+    total_width = 0
+
+    for character in text:
+        cell_width = _get_character_cell_size(character)
+        char_doesnt_fit = total_width + cell_width > width
+
+        if char_doesnt_fit:
+            append_new_line([character])
+            append_to_last_line = lines[-1].append
+            total_width = cell_width
         else:
-            total_size += size
-            append(character)
+            append_to_last_line(character)
+            total_width += cell_width
 
     return ["".join(line) for line in lines]
 
 
 if __name__ == "__main__":  # pragma: no cover
-
     print(get_character_cell_size("😽"))
     for line in chop_cells("""这是对亚洲语言支持的测试。面对模棱两可的想法，拒绝猜测的诱惑。""", 8):
         print(line)