scroll/demo/colors.ts

/**
 * This is a test file and a terminal color table program
 */
import Ansi, { Ground } from '../src/common/ansi.ts';
// ----------------------------------------------------------------------------
// Display table of the 256 type color console escape codes
// ----------------------------------------------------------------------------
function print16colorTable(): void {
	let colorTable = '';

	[30, 90].forEach((start) => {
		let i = 0;
		let end = start + 8;
		for (i = start; i < end; i++) {
			colorTable += Ansi.color(i);
			colorTable += String(i).padStart(3, ' ').padEnd(4, ' ');
			colorTable += Ansi.ResetFormatting;
		}

		colorTable += ' '.repeat(5);

		start += 10;
		end += 10;
		for (i = start; i < end; i++) {
			colorTable += Ansi.color(i);
			colorTable += String(i).padStart(4, ' ').padEnd(5, ' ');
			colorTable += Ansi.ResetFormatting;
		}

		colorTable += '\n';
	});

	colorTable += '\n';

	console.log(colorTable);
}
function print256colorTable(): void {
	let colorTable = '';
	// deno-fmt-ignore
	const breaks = [
		7, 15, 
		21, 27, 33, 39, 45, 51, 
		57, 63, 69, 75, 81, 87, 
		93, 99, 105, 111, 117, 123, 
		129, 135, 141, 147, 153, 159, 
		165, 171, 177, 183, 189, 195, 
		201, 207, 213, 219, 225, 231, 
		237, 243, 249, 255,
	];
	const doubleBreaks = [15, 51, 87, 123, 159, 195, 231, 255];

	breaks.forEach((line, n) => {
		const start = (n > 0) ? breaks[n - 1] + 1 : 0;
		const end = line + 1;

		let i = 0;

		for (i = start; i < end; i++) {
			colorTable += Ansi.color256(i, Ground.Fore);
			colorTable += String(i).padStart(4, ' ').padEnd(5, ' ');
			colorTable += Ansi.ResetFormatting;
		}

		colorTable += ' '.repeat(5);

		for (i = start; i < end; i++) {
			colorTable += Ansi.color256(i, Ground.Back);
			colorTable += String(i).padStart(4, ' ').padEnd(5, ' ');
			colorTable += Ansi.ResetFormatting;
		}

		colorTable += '\n';

		if (doubleBreaks.includes(line)) {
			colorTable += '\n';
		}
	});

	console.log(colorTable);
}

print16colorTable();
print256colorTable();

/**
 * Test code for highlighting
 */
const decimal: number[] = [0, 117];
const bigDecimal = 123456789123456789n;
const octal: number[] = [0o15, 0o1];
const bigOctal = 0o777777777777n;
const hexadecimal: number[] = [0x1123, 0x00111];
const bigHex = 0x123456789ABCDEFn;
const binary: number[] = [0b11, 0b0011];
const bigBinary = 0b11101001010101010101n;