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130 lines
4.1 KiB
TypeScript
130 lines
4.1 KiB
TypeScript
// Copyright Joyent, Inc. and other Node contributors. MIT license.
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// Forked from Node's lib/internal/cli_table.js
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import { hasOwnProperty } from "./util.ts";
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import { stripColor } from "../colors.ts";
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const tableChars = {
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middleMiddle: "─",
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rowMiddle: "┼",
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topRight: "┐",
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topLeft: "┌",
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leftMiddle: "├",
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topMiddle: "┬",
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bottomRight: "┘",
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bottomLeft: "└",
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bottomMiddle: "┴",
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rightMiddle: "┤",
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left: "│ ",
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right: " │",
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middle: " │ ",
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};
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function isFullWidthCodePoint(code: number): boolean {
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// Code points are partially derived from:
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// http://www.unicode.org/Public/UNIDATA/EastAsianWidth.txt
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return (
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code >= 0x1100 &&
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(code <= 0x115f || // Hangul Jamo
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code === 0x2329 || // LEFT-POINTING ANGLE BRACKET
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code === 0x232a || // RIGHT-POINTING ANGLE BRACKET
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// CJK Radicals Supplement .. Enclosed CJK Letters and Months
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(code >= 0x2e80 && code <= 0x3247 && code !== 0x303f) ||
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// Enclosed CJK Letters and Months .. CJK Unified Ideographs Extension A
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(code >= 0x3250 && code <= 0x4dbf) ||
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// CJK Unified Ideographs .. Yi Radicals
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(code >= 0x4e00 && code <= 0xa4c6) ||
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// Hangul Jamo Extended-A
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(code >= 0xa960 && code <= 0xa97c) ||
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// Hangul Syllables
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(code >= 0xac00 && code <= 0xd7a3) ||
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// CJK Compatibility Ideographs
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(code >= 0xf900 && code <= 0xfaff) ||
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// Vertical Forms
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(code >= 0xfe10 && code <= 0xfe19) ||
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// CJK Compatibility Forms .. Small Form Variants
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(code >= 0xfe30 && code <= 0xfe6b) ||
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// Halfwidth and Fullwidth Forms
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(code >= 0xff01 && code <= 0xff60) ||
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(code >= 0xffe0 && code <= 0xffe6) ||
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// Kana Supplement
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(code >= 0x1b000 && code <= 0x1b001) ||
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// Enclosed Ideographic Supplement
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(code >= 0x1f200 && code <= 0x1f251) ||
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// Miscellaneous Symbols and Pictographs 0x1f300 - 0x1f5ff
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// Emoticons 0x1f600 - 0x1f64f
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(code >= 0x1f300 && code <= 0x1f64f) ||
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// CJK Unified Ideographs Extension B .. Tertiary Ideographic Plane
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(code >= 0x20000 && code <= 0x3fffd))
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);
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}
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function getStringWidth(str: string): number {
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str = stripColor(str).normalize("NFC");
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let width = 0;
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for (const ch of str) {
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width += isFullWidthCodePoint(ch.codePointAt(0)!) ? 2 : 1;
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}
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return width;
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}
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function renderRow(row: string[], columnWidths: number[]): string {
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let out = tableChars.left;
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for (let i = 0; i < row.length; i++) {
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const cell = row[i];
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const len = getStringWidth(cell);
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const needed = (columnWidths[i] - len) / 2;
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// round(needed) + ceil(needed) will always add up to the amount
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// of spaces we need while also left justifying the output.
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out += `${" ".repeat(needed)}${cell}${" ".repeat(Math.ceil(needed))}`;
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if (i !== row.length - 1) {
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out += tableChars.middle;
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}
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}
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out += tableChars.right;
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return out;
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}
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export function cliTable(head: string[], columns: string[][]): string {
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const rows: string[][] = [];
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const columnWidths = head.map((h: string): number => getStringWidth(h));
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const longestColumn = columns.reduce(
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(n: number, a: string[]): number => Math.max(n, a.length),
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0
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);
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for (let i = 0; i < head.length; i++) {
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const column = columns[i];
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for (let j = 0; j < longestColumn; j++) {
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if (rows[j] === undefined) {
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rows[j] = [];
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}
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const value = (rows[j][i] = hasOwnProperty(column, j) ? column[j] : "");
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const width = columnWidths[i] || 0;
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const counted = getStringWidth(value);
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columnWidths[i] = Math.max(width, counted);
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}
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}
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const divider = columnWidths.map((i: number): string =>
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tableChars.middleMiddle.repeat(i + 2)
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);
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let result =
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`${tableChars.topLeft}${divider.join(tableChars.topMiddle)}` +
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`${tableChars.topRight}\n${renderRow(head, columnWidths)}\n` +
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`${tableChars.leftMiddle}${divider.join(tableChars.rowMiddle)}` +
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`${tableChars.rightMiddle}\n`;
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for (const row of rows) {
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result += `${renderRow(row, columnWidths)}\n`;
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}
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result +=
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`${tableChars.bottomLeft}${divider.join(tableChars.bottomMiddle)}` +
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tableChars.bottomRight;
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return result;
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}
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