source: trip-planner-front/node_modules/wrap-ansi/index.js@ 84d0fbb

'use strict';
const stringWidth = require('string-width');
const stripAnsi = require('strip-ansi');
const ansiStyles = require('ansi-styles');

const ESCAPES = new Set([
        '\u001B',
        '\u009B'
]);

const END_CODE = 39;

const wrapAnsi = code => `${ESCAPES.values().next().value}[${code}m`;

// Calculate the length of words split on ' ', ignoring
// the extra characters added by ansi escape codes
const wordLengths = string => string.split(' ').map(character => stringWidth(character));

// Wrap a long word across multiple rows
// Ansi escape codes do not count towards length
const wrapWord = (rows, word, columns) => {
        const characters = [...word];

        let insideEscape = false;
        let visible = stringWidth(stripAnsi(rows[rows.length - 1]));

        for (const [index, character] of characters.entries()) {
                const characterLength = stringWidth(character);

                if (visible + characterLength <= columns) {
                        rows[rows.length - 1] += character;
                } else {
                        rows.push(character);
                        visible = 0;
                }

                if (ESCAPES.has(character)) {
                        insideEscape = true;
                } else if (insideEscape && character === 'm') {
                        insideEscape = false;
                        continue;
                }

                if (insideEscape) {
                        continue;
                }

                visible += characterLength;

                if (visible === columns && index < characters.length - 1) {
                        rows.push('');
                        visible = 0;
                }
        }

        // It's possible that the last row we copy over is only
        // ansi escape characters, handle this edge-case
        if (!visible && rows[rows.length - 1].length > 0 && rows.length > 1) {
                rows[rows.length - 2] += rows.pop();
        }
};

// Trims spaces from a string ignoring invisible sequences
const stringVisibleTrimSpacesRight = str => {
        const words = str.split(' ');
        let last = words.length;

        while (last > 0) {
                if (stringWidth(words[last - 1]) > 0) {
                        break;
                }

                last--;
        }

        if (last === words.length) {
                return str;
        }

        return words.slice(0, last).join(' ') + words.slice(last).join('');
};

// The wrap-ansi module can be invoked
// in either 'hard' or 'soft' wrap mode
//
// 'hard' will never allow a string to take up more
// than columns characters
//
// 'soft' allows long words to expand past the column length
const exec = (string, columns, options = {}) => {
        if (options.trim !== false && string.trim() === '') {
                return '';
        }

        let pre = '';
        let ret = '';
        let escapeCode;

        const lengths = wordLengths(string);
        let rows = [''];

        for (const [index, word] of string.split(' ').entries()) {
                if (options.trim !== false) {
                        rows[rows.length - 1] = rows[rows.length - 1].trimLeft();
                }

                let rowLength = stringWidth(rows[rows.length - 1]);

                if (index !== 0) {
                        if (rowLength >= columns && (options.wordWrap === false || options.trim === false)) {
                                // If we start with a new word but the current row length equals the length of the columns, add a new row
                                rows.push('');
                                rowLength = 0;
                        }

                        if (rowLength > 0 || options.trim === false) {
                                rows[rows.length - 1] += ' ';
                                rowLength++;
                        }
                }

                // In 'hard' wrap mode, the length of a line is
                // never allowed to extend past 'columns'
                if (options.hard && lengths[index] > columns) {
                        const remainingColumns = (columns - rowLength);
                        const breaksStartingThisLine = 1 + Math.floor((lengths[index] - remainingColumns - 1) / columns);
                        const breaksStartingNextLine = Math.floor((lengths[index] - 1) / columns);
                        if (breaksStartingNextLine < breaksStartingThisLine) {
                                rows.push('');
                        }

                        wrapWord(rows, word, columns);
                        continue;
                }

                if (rowLength + lengths[index] > columns && rowLength > 0 && lengths[index] > 0) {
                        if (options.wordWrap === false && rowLength < columns) {
                                wrapWord(rows, word, columns);
                                continue;
                        }

                        rows.push('');
                }

                if (rowLength + lengths[index] > columns && options.wordWrap === false) {
                        wrapWord(rows, word, columns);
                        continue;
                }

                rows[rows.length - 1] += word;
        }

        if (options.trim !== false) {
                rows = rows.map(stringVisibleTrimSpacesRight);
        }

        pre = rows.join('\n');

        for (const [index, character] of [...pre].entries()) {
                ret += character;

                if (ESCAPES.has(character)) {
                        const code = parseFloat(/\d[^m]*/.exec(pre.slice(index, index + 4)));
                        escapeCode = code === END_CODE ? null : code;
                }

                const code = ansiStyles.codes.get(Number(escapeCode));

                if (escapeCode && code) {
                        if (pre[index + 1] === '\n') {
                                ret += wrapAnsi(code);
                        } else if (character === '\n') {
                                ret += wrapAnsi(escapeCode);
                        }
                }
        }

        return ret;
};

// For each newline, invoke the method separately
module.exports = (string, columns, options) => {
        return String(string)
                .normalize()
                .split('\n')
                .map(line => exec(line, columns, options))
                .join('\n');
};