Merge deno_cli_snapshots into deno_cli (#3064)

cli/js/console_table.ts

@@ -0,0 +1,94 @@
+// Copyright Joyent, Inc. and other Node contributors. MIT license.
+// Forked from Node's lib/internal/cli_table.js
+
+import { TextEncoder } from "./text_encoding.ts";
+import { hasOwnProperty } from "./util.ts";
+
+const encoder = new TextEncoder();
+
+const tableChars = {
+  middleMiddle: "─",
+  rowMiddle: "┼",
+  topRight: "┐",
+  topLeft: "┌",
+  leftMiddle: "├",
+  topMiddle: "┬",
+  bottomRight: "┘",
+  bottomLeft: "└",
+  bottomMiddle: "┴",
+  rightMiddle: "┤",
+  left: "│ ",
+  right: " │",
+  middle: " │ "
+};
+
+const colorRegExp = /\u001b\[\d\d?m/g;
+
+function removeColors(str: string): string {
+  return str.replace(colorRegExp, "");
+}
+
+function countBytes(str: string): number {
+  const normalized = removeColors(String(str)).normalize("NFC");
+
+  return encoder.encode(normalized).byteLength;
+}
+
+function renderRow(row: string[], columnWidths: number[]): string {
+  let out = tableChars.left;
+  for (let i = 0; i < row.length; i++) {
+    const cell = row[i];
+    const len = countBytes(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}${" ".repeat(Math.ceil(needed))}`;
+    if (i !== row.length - 1) {
+      out += tableChars.middle;
+    }
+  }
+  out += tableChars.right;
+  return out;
+}
+
+export function cliTable(head: string[], columns: string[][]): string {
+  const rows: string[][] = [];
+  const columnWidths = head.map((h: string): number => countBytes(h));
+  const longestColumn = columns.reduce(
+    (n: number, a: string[]): number => Math.max(n, a.length),
+    0
+  );
+
+  for (let i = 0; i < head.length; i++) {
+    const column = columns[i];
+    for (let j = 0; j < longestColumn; j++) {
+      if (rows[j] === undefined) {
+        rows[j] = [];
+      }
+      const value = (rows[j][i] = hasOwnProperty(column, j) ? column[j] : "");
+      const width = columnWidths[i] || 0;
+      const counted = countBytes(value);
+      columnWidths[i] = Math.max(width, counted);
+    }
+  }
+
+  const divider = columnWidths.map(
+    (i: number): string => tableChars.middleMiddle.repeat(i + 2)
+  );
+
+  let result =
+    `${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;
+}