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denoland-deno/ext/node/polyfills/internal/cli_table.ts
Bartek Iwańczuk 72fe9bb470
refactor: rename InternalModuleLoader to ExtModuleLoader, use ext: scheme for snapshotted modules (#18041)
This commit renames "deno_core::InternalModuleLoader" to
"ExtModuleLoader" and changes the specifiers used by the 
modules loaded from this loader to "ext:".

"internal:" scheme was really ambiguous and it's more characters than
"ext:", which should result in slightly smaller snapshot size.

Closes https://github.com/denoland/deno/issues/18020
2023-03-08 12:44:54 +01:00

85 lines
2.6 KiB
TypeScript

// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
// Copyright Joyent and Node contributors. All rights reserved. MIT license.
import { getStringWidth } from "ext: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;