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287
node_modules/cliui/build/lib/index.js
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287
node_modules/cliui/build/lib/index.js
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'use strict';
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const align = {
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right: alignRight,
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center: alignCenter
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};
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const top = 0;
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const right = 1;
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const bottom = 2;
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const left = 3;
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export class UI {
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constructor(opts) {
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var _a;
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this.width = opts.width;
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this.wrap = (_a = opts.wrap) !== null && _a !== void 0 ? _a : true;
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this.rows = [];
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}
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span(...args) {
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const cols = this.div(...args);
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cols.span = true;
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}
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resetOutput() {
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this.rows = [];
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}
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div(...args) {
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if (args.length === 0) {
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this.div('');
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}
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if (this.wrap && this.shouldApplyLayoutDSL(...args) && typeof args[0] === 'string') {
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return this.applyLayoutDSL(args[0]);
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}
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const cols = args.map(arg => {
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if (typeof arg === 'string') {
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return this.colFromString(arg);
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}
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return arg;
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});
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this.rows.push(cols);
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return cols;
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}
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shouldApplyLayoutDSL(...args) {
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return args.length === 1 && typeof args[0] === 'string' &&
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/[\t\n]/.test(args[0]);
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}
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applyLayoutDSL(str) {
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const rows = str.split('\n').map(row => row.split('\t'));
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let leftColumnWidth = 0;
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// simple heuristic for layout, make sure the
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// second column lines up along the left-hand.
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// don't allow the first column to take up more
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// than 50% of the screen.
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rows.forEach(columns => {
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if (columns.length > 1 && mixin.stringWidth(columns[0]) > leftColumnWidth) {
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leftColumnWidth = Math.min(Math.floor(this.width * 0.5), mixin.stringWidth(columns[0]));
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}
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});
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// generate a table:
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// replacing ' ' with padding calculations.
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// using the algorithmically generated width.
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rows.forEach(columns => {
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this.div(...columns.map((r, i) => {
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return {
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text: r.trim(),
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padding: this.measurePadding(r),
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width: (i === 0 && columns.length > 1) ? leftColumnWidth : undefined
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};
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}));
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});
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return this.rows[this.rows.length - 1];
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}
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colFromString(text) {
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return {
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text,
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padding: this.measurePadding(text)
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};
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}
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measurePadding(str) {
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// measure padding without ansi escape codes
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const noAnsi = mixin.stripAnsi(str);
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return [0, noAnsi.match(/\s*$/)[0].length, 0, noAnsi.match(/^\s*/)[0].length];
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}
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toString() {
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const lines = [];
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this.rows.forEach(row => {
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this.rowToString(row, lines);
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});
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// don't display any lines with the
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// hidden flag set.
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return lines
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.filter(line => !line.hidden)
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.map(line => line.text)
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.join('\n');
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}
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rowToString(row, lines) {
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this.rasterize(row).forEach((rrow, r) => {
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let str = '';
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rrow.forEach((col, c) => {
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const { width } = row[c]; // the width with padding.
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const wrapWidth = this.negatePadding(row[c]); // the width without padding.
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let ts = col; // temporary string used during alignment/padding.
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if (wrapWidth > mixin.stringWidth(col)) {
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ts += ' '.repeat(wrapWidth - mixin.stringWidth(col));
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}
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// align the string within its column.
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if (row[c].align && row[c].align !== 'left' && this.wrap) {
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const fn = align[row[c].align];
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ts = fn(ts, wrapWidth);
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if (mixin.stringWidth(ts) < wrapWidth) {
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ts += ' '.repeat((width || 0) - mixin.stringWidth(ts) - 1);
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}
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}
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// apply border and padding to string.
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const padding = row[c].padding || [0, 0, 0, 0];
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if (padding[left]) {
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str += ' '.repeat(padding[left]);
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}
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str += addBorder(row[c], ts, '| ');
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str += ts;
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str += addBorder(row[c], ts, ' |');
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if (padding[right]) {
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str += ' '.repeat(padding[right]);
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}
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// if prior row is span, try to render the
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// current row on the prior line.
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if (r === 0 && lines.length > 0) {
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str = this.renderInline(str, lines[lines.length - 1]);
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}
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});
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// remove trailing whitespace.
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lines.push({
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text: str.replace(/ +$/, ''),
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span: row.span
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});
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});
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return lines;
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}
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// if the full 'source' can render in
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// the target line, do so.
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renderInline(source, previousLine) {
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const match = source.match(/^ */);
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const leadingWhitespace = match ? match[0].length : 0;
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const target = previousLine.text;
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const targetTextWidth = mixin.stringWidth(target.trimRight());
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if (!previousLine.span) {
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return source;
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}
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// if we're not applying wrapping logic,
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// just always append to the span.
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if (!this.wrap) {
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previousLine.hidden = true;
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return target + source;
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}
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if (leadingWhitespace < targetTextWidth) {
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return source;
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}
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previousLine.hidden = true;
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return target.trimRight() + ' '.repeat(leadingWhitespace - targetTextWidth) + source.trimLeft();
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}
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rasterize(row) {
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const rrows = [];
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const widths = this.columnWidths(row);
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let wrapped;
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// word wrap all columns, and create
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// a data-structure that is easy to rasterize.
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row.forEach((col, c) => {
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// leave room for left and right padding.
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col.width = widths[c];
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if (this.wrap) {
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wrapped = mixin.wrap(col.text, this.negatePadding(col), { hard: true }).split('\n');
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}
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else {
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wrapped = col.text.split('\n');
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}
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if (col.border) {
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wrapped.unshift('.' + '-'.repeat(this.negatePadding(col) + 2) + '.');
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wrapped.push("'" + '-'.repeat(this.negatePadding(col) + 2) + "'");
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}
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// add top and bottom padding.
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if (col.padding) {
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wrapped.unshift(...new Array(col.padding[top] || 0).fill(''));
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wrapped.push(...new Array(col.padding[bottom] || 0).fill(''));
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}
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wrapped.forEach((str, r) => {
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if (!rrows[r]) {
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rrows.push([]);
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}
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const rrow = rrows[r];
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for (let i = 0; i < c; i++) {
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if (rrow[i] === undefined) {
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rrow.push('');
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}
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}
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rrow.push(str);
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});
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});
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return rrows;
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}
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negatePadding(col) {
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let wrapWidth = col.width || 0;
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if (col.padding) {
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wrapWidth -= (col.padding[left] || 0) + (col.padding[right] || 0);
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}
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if (col.border) {
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wrapWidth -= 4;
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}
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return wrapWidth;
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}
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columnWidths(row) {
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if (!this.wrap) {
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return row.map(col => {
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return col.width || mixin.stringWidth(col.text);
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});
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}
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let unset = row.length;
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let remainingWidth = this.width;
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// column widths can be set in config.
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const widths = row.map(col => {
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if (col.width) {
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unset--;
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remainingWidth -= col.width;
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return col.width;
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}
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return undefined;
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});
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// any unset widths should be calculated.
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const unsetWidth = unset ? Math.floor(remainingWidth / unset) : 0;
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return widths.map((w, i) => {
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if (w === undefined) {
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return Math.max(unsetWidth, _minWidth(row[i]));
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}
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return w;
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});
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}
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}
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function addBorder(col, ts, style) {
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if (col.border) {
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if (/[.']-+[.']/.test(ts)) {
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return '';
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}
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if (ts.trim().length !== 0) {
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return style;
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}
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return ' ';
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}
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return '';
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}
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// calculates the minimum width of
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// a column, based on padding preferences.
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function _minWidth(col) {
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const padding = col.padding || [];
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const minWidth = 1 + (padding[left] || 0) + (padding[right] || 0);
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if (col.border) {
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return minWidth + 4;
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}
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return minWidth;
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}
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function getWindowWidth() {
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/* istanbul ignore next: depends on terminal */
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if (typeof process === 'object' && process.stdout && process.stdout.columns) {
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return process.stdout.columns;
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}
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return 80;
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}
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function alignRight(str, width) {
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str = str.trim();
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const strWidth = mixin.stringWidth(str);
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if (strWidth < width) {
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return ' '.repeat(width - strWidth) + str;
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}
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return str;
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}
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function alignCenter(str, width) {
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str = str.trim();
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const strWidth = mixin.stringWidth(str);
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/* istanbul ignore next */
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if (strWidth >= width) {
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return str;
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}
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return ' '.repeat((width - strWidth) >> 1) + str;
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}
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let mixin;
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export function cliui(opts, _mixin) {
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mixin = _mixin;
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return new UI({
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width: (opts === null || opts === void 0 ? void 0 : opts.width) || getWindowWidth(),
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wrap: opts === null || opts === void 0 ? void 0 : opts.wrap
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});
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}
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