280 lines
7.8 KiB
JavaScript
280 lines
7.8 KiB
JavaScript
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'use strict';
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const stringWidth = require('string-width');
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const chalk = require('chalk');
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const widestLine = require('widest-line');
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const cliBoxes = require('cli-boxes');
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const camelCase = require('camelcase');
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const ansiAlign = require('ansi-align');
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const wrapAnsi = require('wrap-ansi');
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const NL = '\n';
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const PAD = ' ';
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const terminalColumns = () => {
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const {env, stdout, stderr} = process;
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if (stdout && stdout.columns) {
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return stdout.columns;
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}
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if (stderr && stderr.columns) {
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return stderr.columns;
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}
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if (env.COLUMNS) {
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return Number.parseInt(env.COLUMNS, 10);
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}
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return 80;
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};
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const getObject = detail => {
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return typeof detail === 'number' ? {
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top: detail,
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right: detail * 3,
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bottom: detail,
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left: detail * 3
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} : {
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top: 0,
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right: 0,
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bottom: 0,
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left: 0,
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...detail
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};
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};
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const getBorderChars = borderStyle => {
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const sides = [
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'topLeft',
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'topRight',
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'bottomRight',
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'bottomLeft',
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'vertical',
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'horizontal'
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];
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let chararacters;
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if (typeof borderStyle === 'string') {
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chararacters = cliBoxes[borderStyle];
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if (!chararacters) {
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throw new TypeError(`Invalid border style: ${borderStyle}`);
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}
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} else {
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for (const side of sides) {
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if (!borderStyle[side] || typeof borderStyle[side] !== 'string') {
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throw new TypeError(`Invalid border style: ${side}`);
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}
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}
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chararacters = borderStyle;
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}
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return chararacters;
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};
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const makeTitle = (text, horizontal, alignement) => {
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let title = '';
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const textWidth = stringWidth(text);
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switch (alignement) {
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case 'left':
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title = text + horizontal.slice(textWidth);
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break;
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case 'right':
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title = horizontal.slice(textWidth) + text;
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break;
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default:
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horizontal = horizontal.slice(textWidth);
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if (horizontal.length % 2 === 1) { // This is needed in case the length is odd
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horizontal = horizontal.slice(Math.floor(horizontal.length / 2));
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title = horizontal.slice(1) + text + horizontal; // We reduce the left part of one character to avoid the bar to go beyond its limit
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} else {
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horizontal = horizontal.slice(horizontal.length / 2);
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title = horizontal + text + horizontal;
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}
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break;
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}
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return title;
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};
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const makeContentText = (text, padding, columns, align) => {
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text = ansiAlign(text, {align});
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let lines = text.split(NL);
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const textWidth = widestLine(text);
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const max = columns - padding.left - padding.right;
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if (textWidth > max) {
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const newLines = [];
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for (const line of lines) {
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const createdLines = wrapAnsi(line, max, {hard: true});
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const alignedLines = ansiAlign(createdLines, {align});
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const alignedLinesArray = alignedLines.split('\n');
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const longestLength = Math.max(...alignedLinesArray.map(s => stringWidth(s)));
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for (const alignedLine of alignedLinesArray) {
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let paddedLine;
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switch (align) {
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case 'center':
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paddedLine = PAD.repeat((max - longestLength) / 2) + alignedLine;
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break;
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case 'right':
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paddedLine = PAD.repeat(max - longestLength) + alignedLine;
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break;
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default:
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paddedLine = alignedLine;
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break;
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}
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newLines.push(paddedLine);
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}
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}
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lines = newLines;
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}
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if (align === 'center' && textWidth < max) {
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lines = lines.map(line => PAD.repeat((max - textWidth) / 2) + line);
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} else if (align === 'right' && textWidth < max) {
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lines = lines.map(line => PAD.repeat(max - textWidth) + line);
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}
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const paddingLeft = PAD.repeat(padding.left);
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const paddingRight = PAD.repeat(padding.right);
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lines = lines.map(line => paddingLeft + line + paddingRight);
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lines = lines.map(line => {
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if (columns - stringWidth(line) > 0) {
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switch (align) {
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case 'center':
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return line + PAD.repeat(columns - stringWidth(line));
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case 'right':
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return line + PAD.repeat(columns - stringWidth(line));
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default:
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return line + PAD.repeat(columns - stringWidth(line));
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}
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}
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return line;
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});
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if (padding.top > 0) {
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lines = new Array(padding.top).fill(PAD.repeat(columns)).concat(lines);
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}
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if (padding.bottom > 0) {
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lines = lines.concat(new Array(padding.bottom).fill(PAD.repeat(columns)));
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}
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return lines.join(NL);
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};
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const isHex = color => color.match(/^#(?:[0-f]{3}){1,2}$/i);
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const isColorValid = color => typeof color === 'string' && ((chalk[color]) || isHex(color));
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const getColorFn = color => isHex(color) ? chalk.hex(color) : chalk[color];
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const getBGColorFn = color => isHex(color) ? chalk.bgHex(color) : chalk[camelCase(['bg', color])];
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module.exports = (text, options) => {
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options = {
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padding: 0,
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borderStyle: 'single',
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dimBorder: false,
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textAlignment: 'left',
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float: 'left',
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titleAlignment: 'left',
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...options
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};
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// This option is deprecated
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if (options.align) {
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options.textAlignment = options.align;
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}
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const BORDERS_WIDTH = 2;
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if (options.borderColor && !isColorValid(options.borderColor)) {
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throw new Error(`${options.borderColor} is not a valid borderColor`);
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}
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if (options.backgroundColor && !isColorValid(options.backgroundColor)) {
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throw new Error(`${options.backgroundColor} is not a valid backgroundColor`);
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}
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const chars = getBorderChars(options.borderStyle);
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const padding = getObject(options.padding);
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const margin = getObject(options.margin);
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const colorizeBorder = border => {
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const newBorder = options.borderColor ? getColorFn(options.borderColor)(border) : border;
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return options.dimBorder ? chalk.dim(newBorder) : newBorder;
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};
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const colorizeContent = content => options.backgroundColor ? getBGColorFn(options.backgroundColor)(content) : content;
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const columns = terminalColumns();
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let contentWidth = widestLine(wrapAnsi(text, columns - BORDERS_WIDTH, {hard: true, trim: false})) + padding.left + padding.right;
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// This prevents the title bar to exceed the console's width
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let title = options.title && options.title.slice(0, columns - 4 - margin.left - margin.right);
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if (title) {
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title = ` ${title} `;
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// Make the box larger to fit a larger title
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if (stringWidth(title) > contentWidth) {
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contentWidth = stringWidth(title);
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}
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}
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if ((margin.left && margin.right) && contentWidth + BORDERS_WIDTH + margin.left + margin.right > columns) {
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// Let's assume we have margins: left = 3, right = 5, in total = 8
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const spaceForMargins = columns - contentWidth - BORDERS_WIDTH;
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// Let's assume we have space = 4
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const multiplier = spaceForMargins / (margin.left + margin.right);
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// Here: multiplier = 4/8 = 0.5
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margin.left = Math.max(0, Math.floor(margin.left * multiplier));
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margin.right = Math.max(0, Math.floor(margin.right * multiplier));
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// Left: 3 * 0.5 = 1.5 -> 1
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// Right: 6 * 0.5 = 3
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}
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// Prevent content from exceeding the console's width
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contentWidth = Math.min(contentWidth, columns - BORDERS_WIDTH - margin.left - margin.right);
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text = makeContentText(text, padding, contentWidth, options.textAlignment);
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let marginLeft = PAD.repeat(margin.left);
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if (options.float === 'center') {
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const marginWidth = Math.max((columns - contentWidth - BORDERS_WIDTH) / 2, 0);
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marginLeft = PAD.repeat(marginWidth);
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} else if (options.float === 'right') {
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const marginWidth = Math.max(columns - contentWidth - margin.right - BORDERS_WIDTH, 0);
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marginLeft = PAD.repeat(marginWidth);
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}
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const horizontal = chars.horizontal.repeat(contentWidth);
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const top = colorizeBorder(NL.repeat(margin.top) + marginLeft + chars.topLeft + (title ? makeTitle(title, horizontal, options.titleAlignment) : horizontal) + chars.topRight);
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const bottom = colorizeBorder(marginLeft + chars.bottomLeft + horizontal + chars.bottomRight + NL.repeat(margin.bottom));
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const side = colorizeBorder(chars.vertical);
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const LINE_SEPARATOR = (contentWidth + BORDERS_WIDTH + margin.left >= columns) ? '' : NL;
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const lines = text.split(NL);
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const middle = lines.map(line => {
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return marginLeft + side + colorizeContent(line) + side;
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}).join(LINE_SEPARATOR);
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return top + LINE_SEPARATOR + middle + LINE_SEPARATOR + bottom;
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};
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module.exports._borderStyles = cliBoxes;
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