// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license. // Copyright Joyent and Node contributors. All rights reserved. MIT license. import { getStringWidth } from "internal:deno_node/internal/util/inspect.mjs"; // The use of Unicode characters below is the only non-comment use of non-ASCII // Unicode characters in Node.js built-in modules. If they are ever removed or // rewritten with \u escapes, then a test will need to be (re-)added to Node.js // core to verify that Unicode characters work in built-ins. // Refs: https://github.com/nodejs/node/issues/10673 const tableChars = { middleMiddle: "─", rowMiddle: "┼", topRight: "┐", topLeft: "┌", leftMiddle: "├", topMiddle: "┬", bottomRight: "┘", bottomLeft: "└", bottomMiddle: "┴", rightMiddle: "┤", left: "│ ", right: " │", middle: " │ ", }; const renderRow = (row: string[], columnWidths: number[]) => { let out = tableChars.left; for (let i = 0; i < row.length; i++) { const cell = row[i]; const len = getStringWidth(cell); const needed = (columnWidths[i] - len) / 2; // round(needed) + ceil(needed) will always add up to the amount // of spaces we need while also left justifying the output. out += " ".repeat(needed) + cell + " ".repeat(Math.ceil(needed)); if (i !== row.length - 1) { out += tableChars.middle; } } out += tableChars.right; return out; }; const table = (head: string[], columns: string[][]) => { const rows: string[][] = []; const columnWidths = head.map((h) => getStringWidth(h)); const longestColumn = Math.max(...columns.map((a) => a.length)); for (let i = 0; i < head.length; i++) { const column = columns[i]; for (let j = 0; j < longestColumn; j++) { if (rows[j] === undefined) { rows[j] = []; } const value = rows[j][i] = Object.hasOwn(column, j) ? column[j] : ""; const width = columnWidths[i] || 0; const counted = getStringWidth(value); columnWidths[i] = Math.max(width, counted); } } const divider = columnWidths.map((i) => tableChars.middleMiddle.repeat(i + 2) ); let result = tableChars.topLeft + divider.join(tableChars.topMiddle) + tableChars.topRight + "\n" + renderRow(head, columnWidths) + "\n" + tableChars.leftMiddle + divider.join(tableChars.rowMiddle) + tableChars.rightMiddle + "\n"; for (const row of rows) { result += `${renderRow(row, columnWidths)}\n`; } result += tableChars.bottomLeft + divider.join(tableChars.bottomMiddle) + tableChars.bottomRight; return result; }; export default table;