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