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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.// Ported from unicode_width rust crate, Copyright (c) 2015 The Rust Project Developers. MIT license.
import data from "./_data.json" assert { type: "json" };import { runLengthDecode } from "./_rle.ts";
let tables: Uint8Array[] | null = null;function lookupWidth(cp: number) {  if (!tables) tables = data.tables.map(runLengthDecode);
  const t1Offset = tables[0][(cp >> 13) & 0xff];  const t2Offset = tables[1][128 * t1Offset + ((cp >> 6) & 0x7f)];  const packedWidths = tables[2][16 * t2Offset + ((cp >> 2) & 0xf)];
  const width = (packedWidths >> (2 * (cp & 0b11))) & 0b11;
  return width === 3 ? 1 : width;}
const cache = new Map<string, number | null>();function charWidth(ch: string) {  if (cache.has(ch)) return cache.get(ch)!;
  const cp = ch.codePointAt(0)!;  let v: number | null = null;
  if (cp < 0x7f) {    v = cp >= 0x20 ? 1 : cp === 0 ? 0 : null;  } else if (cp >= 0xa0) {    v = lookupWidth(cp);  } else {    v = null;  }
  cache.set(ch, v);  return v;}
/** * Get the width of a string's constituent characters in columns in TTY-like * environments. * * Combine with `stripColor` from `fmt/colors.ts` to get the expected physical * width of a string in the console. * * @example * ```ts * import { unicodeWidth } from "https://deno.land/std@$STD_VERSION/console/unicode_width.ts"; * import { assertEquals } from "https://deno.land/std@$STD_VERSION/assert/assert_equals.ts"; * import { stripColor } from "https://deno.land/std@$STD_VERSION/fmt/colors.ts"; * * assertEquals(unicodeWidth("hello world"), 11); * assertEquals(unicodeWidth("天地玄黃宇宙洪荒"), 16); * assertEquals(unicodeWidth("ｆｕｌｌｗｉｄｔｈ"), 18); * assertEquals(unicodeWidth(stripColor("\x1b[36mголубой\x1b[39m")), 7); * assertEquals(unicodeWidth(stripColor("\x1b[31m紅色\x1b[39m")), 4); * assertEquals(unicodeWidth(stripColor("\x1B]8;;https://deno.land\x07🦕\x1B]8;;\x07")), 2); * ``` */export function unicodeWidth(str: string) {  return [...str].map((ch) => charWidth(ch) ?? 0).reduce((a, b) => a + b, 0);}