From 7a53a9f683ad6d681c57574df6228a9f3bb167ff Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rodrigo=20Gir=C3=A3o=20Serr=C3=A3o?=
 <5621605+rodrigogiraoserrao@users.noreply.github.com>
Date: Mon, 11 Mar 2024 11:56:01 +0000
Subject: [PATCH] Revert back to old CELL_WIDTHS format.

Ideally we'd use the parameter `key` of `bisect_right` with `itemgetter(0)` but that's +3.10 only.
So, instead we build the tuple `(cp,)`.
This means that the tuple `(2,)` will be placed to the right of the range `(1, 31, -1)`, and we can do the calculations as before.
However, this will codepoints at the start of their ranges on the wrong side of the range.
E.g., `(1,)` would be placed to the left of `(1, 31, -1)` instead of to the right.
To fix this, we add a second element to the tuple that is larger than any second element in the ranges, which ensures that whenever the first element of the tuples (the codepoint and the range start) match, the tuple with the codepoint is always placed on the right.

Relevant review comment: https://github.com/Textualize/rich/pull/3300#issuecomment-1987269715
---
 rich/_cell_widths.py          | 1808 ++++++++-------------------------
 rich/cells.py                 |   18 +-
 tools/make_terminal_widths.py |   39 +-
 3 files changed, 473 insertions(+), 1392 deletions(-)

diff --git a/rich/_cell_widths.py b/rich/_cell_widths.py
index 10a71436..608ae3a7 100644
--- a/rich/_cell_widths.py
+++ b/rich/_cell_widths.py
@@ -1,1362 +1,454 @@
 # Auto generated by make_terminal_widths.py
 
-CELL_WIDTH_RANGE_STARTS = [
-    0,
-    1,
-    127,
-    173,
-    768,
-    1155,
-    1425,
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-]
-
-
-CELL_WIDTH_RANGE_ENDS = [
-    0,
-    31,
-    159,
-    173,
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-]
-
-
 CELL_WIDTHS = [
-    0,
-    -1,
-    -1,
-    0,
-    0,
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 ]
diff --git a/rich/cells.py b/rich/cells.py
index ef1eb223..307b6812 100644
--- a/rich/cells.py
+++ b/rich/cells.py
@@ -2,15 +2,12 @@ from __future__ import annotations
 
 import bisect
 import re
+import sys
 from functools import lru_cache
 from itertools import accumulate
 from typing import Callable
 
-from ._cell_widths import (
-    CELL_WIDTH_RANGE_ENDS,
-    CELL_WIDTH_RANGE_STARTS,
-    CELL_WIDTHS,
-)
+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
@@ -73,10 +70,13 @@ def _get_codepoint_cell_size(codepoint: int) -> int:
     Returns:
         int: Number of cells (0, 1 or 2) occupied by that character.
     """
-
-    idx = bisect.bisect_right(CELL_WIDTH_RANGE_STARTS, codepoint)
-    if codepoint <= CELL_WIDTH_RANGE_ENDS[idx - 1]:
-        width = CELL_WIDTHS[idx - 1]
+    # We create the tuple as `(cp, sys.maxunicode + 2)` instead of just (cp,)
+    # because we want the index to always be on the right of the range that
+    # `cp` belongs to. E.g., `(1,)` won't be placed to the right of `(1, 31, -1)`
+    # but `(1, sys.maxunicode + 2)` will.
+    idx = bisect.bisect_right(CELL_WIDTHS, (codepoint, sys.maxunicode + 2))
+    _start, end, width = CELL_WIDTHS[idx - 1]
+    if codepoint <= end:
         return 0 if width == -1 else width
     else:
         return 1
diff --git a/tools/make_terminal_widths.py b/tools/make_terminal_widths.py
index dd262342..35c9fe10 100644
--- a/tools/make_terminal_widths.py
+++ b/tools/make_terminal_widths.py
@@ -13,10 +13,8 @@ from wcwidth import wcwidth
 progress = Progress()
 
 
-def make_widths_lists() -> Tuple[List[int], List[int], List[int]]:
-    starts: List[int] = []
-    ends: List[int] = []
-    widths: List[int] = []
+def make_widths_table() -> List[Tuple[int, int, int]]:
+    widths: List[Tuple[int, int, int]] = []
 
     make_table_task = progress.add_task("Calculating table...")
 
@@ -32,16 +30,12 @@ def make_widths_lists() -> Tuple[List[int], List[int], List[int]]:
         progress.advance(make_table_task, len(cp_list))
         if width == 1:
             continue
-        starts.append(cp_list[0][0])
-        ends.append(cp_list[-1][0])
-        widths.append(width)
-    return starts, ends, widths
+        widths.append((cp_list[0][0], cp_list[-1][0], width))
+    return widths
 
 
 def get_cell_size(
-    starts: List[int],
-    ends: List[int],
-    widths: List[int],
+    widths: List[Tuple[int, int, int]],
     codepoint: int,
 ) -> int:
     """Get the cell size of a character.
@@ -53,37 +47,32 @@ def get_cell_size(
         int: Number of cells (0, 1 or 2) occupied by that character.
     """
 
-    idx = bisect.bisect_right(starts, codepoint)
-    if codepoint <= ends[idx - 1]:
-        return widths[idx - 1]
+    idx = bisect.bisect_right(widths, (codepoint, sys.maxunicode + 2))
+    _start, end, width = widths[idx - 1]
+    if codepoint <= end:
+        return width
     else:
         return 1
 
 
-def test(starts: List[int], ends: List[int], widths: List[int]) -> None:
+def test(widths: List[Tuple[int, int, int]]) -> None:
     for codepoint in progress.track(
         range(0, sys.maxunicode + 1), description="Testing..."
     ):
         character = chr(codepoint)
-        width1 = get_cell_size(starts, ends, widths, codepoint)
+        width1 = get_cell_size(widths, codepoint)
         width2 = wcwidth(character)
         if width1 != width2:
-            print(f"{width1} != {width2}")
+            print(f"{codepoint}: {width1} != {width2}")
             break
 
 
 def run() -> None:
     with progress:
-        starts, ends, widths = make_widths_lists()
-        test(starts, ends, widths)
+        widths = make_widths_table()
+        test(widths)
     table_file = f"""# Auto generated by make_terminal_widths.py
 
-CELL_WIDTH_RANGE_STARTS = {starts!r}
-
-
-CELL_WIDTH_RANGE_ENDS = {ends!r}
-
-
 CELL_WIDTHS = {widths!r}
 """
     with open("../rich/_cell_widths.py", "wt") as fh: