mark_highlight_word.js

// https://github.com/sindresorhus/is-regexp
const isRegex = input => Object.prototype.toString.call(input) === '[object RegExp]';

// https://github.com/sindresorhus/clone-regexp
const cloneRegexp = (e,n={}) =>{if(!isRegexp(e))throw new TypeError("Expected a RegExp instance");const t=Object.keys({ global: 'g', ignoreCase: 'i', multiline: 'm', dotAll: 's', sticky: 'y', unicode: 'u' }).map(t=>("boolean"==typeof n[t]?n[t]:e[t])?{ global: 'g', ignoreCase: 'i', multiline: 'm', dotAll: 's', sticky: 'y', unicode: 'u' }[t]:"").join(""),a=new RegExp(n.source||e.source,t);return a.lastIndex="number"==typeof n.lastIndex?n.lastIndex:e.lastIndex,a};

// https://github.com/andrewrk/node-diacritics
let replacementList = [{ base: ' ', chars: "\u00A0", }, { base: '0', chars: "\u07C0", }, { base: 'A', chars: "\u24B6\uFF21\u00C0\u00C1\u00C2\u1EA6\u1EA4\u1EAA\u1EA8\u00C3\u0100\u0102\u1EB0\u1EAE\u1EB4\u1EB2\u0226\u01E0\u00C4\u01DE\u1EA2\u00C5\u01FA\u01CD\u0200\u0202\u1EA0\u1EAC\u1EB6\u1E00\u0104\u023A\u2C6F", }, { base: 'AA', chars: "\uA732", }, { base: 'AE', chars: "\u00C6\u01FC\u01E2", }, { base: 'AO', chars: "\uA734", }, { base: 'AU', chars: "\uA736", }, { base: 'AV', chars: "\uA738\uA73A", }, { base: 'AY', chars: "\uA73C", }, { base: 'B', chars: "\u24B7\uFF22\u1E02\u1E04\u1E06\u0243\u0181", }, { base: 'C', chars: "\u24b8\uff23\uA73E\u1E08\u0106\u0043\u0108\u010A\u010C\u00C7\u0187\u023B", }, { base: 'D', chars: "\u24B9\uFF24\u1E0A\u010E\u1E0C\u1E10\u1E12\u1E0E\u0110\u018A\u0189\u1D05\uA779", }, { base: 'Dh', chars: "\u00D0", }, { base: 'DZ', chars: "\u01F1\u01C4", }, { base: 'Dz', chars: "\u01F2\u01C5", }, { base: 'E', chars: "\u025B\u24BA\uFF25\u00C8\u00C9\u00CA\u1EC0\u1EBE\u1EC4\u1EC2\u1EBC\u0112\u1E14\u1E16\u0114\u0116\u00CB\u1EBA\u011A\u0204\u0206\u1EB8\u1EC6\u0228\u1E1C\u0118\u1E18\u1E1A\u0190\u018E\u1D07", }, { base: 'F', chars: "\uA77C\u24BB\uFF26\u1E1E\u0191\uA77B", }, { base: 'G', chars: "\u24BC\uFF27\u01F4\u011C\u1E20\u011E\u0120\u01E6\u0122\u01E4\u0193\uA7A0\uA77D\uA77E\u0262", }, { base: 'H', chars: "\u24BD\uFF28\u0124\u1E22\u1E26\u021E\u1E24\u1E28\u1E2A\u0126\u2C67\u2C75\uA78D", }, { base: 'I', chars: "\u24BE\uFF29\xCC\xCD\xCE\u0128\u012A\u012C\u0130\xCF\u1E2E\u1EC8\u01CF\u0208\u020A\u1ECA\u012E\u1E2C\u0197", }, { base: 'J', chars: "\u24BF\uFF2A\u0134\u0248\u0237", }, { base: 'K', chars: "\u24C0\uFF2B\u1E30\u01E8\u1E32\u0136\u1E34\u0198\u2C69\uA740\uA742\uA744\uA7A2", }, { base: 'L', chars: "\u24C1\uFF2C\u013F\u0139\u013D\u1E36\u1E38\u013B\u1E3C\u1E3A\u0141\u023D\u2C62\u2C60\uA748\uA746\uA780", }, { base: 'LJ', chars: "\u01C7", }, { base: 'Lj', chars: "\u01C8", }, { base: 'M', chars: "\u24C2\uFF2D\u1E3E\u1E40\u1E42\u2C6E\u019C\u03FB", }, { base: 'N', chars: "\uA7A4\u0220\u24C3\uFF2E\u01F8\u0143\xD1\u1E44\u0147\u1E46\u0145\u1E4A\u1E48\u019D\uA790\u1D0E", }, { base: 'NJ', chars: "\u01CA", }, { base: 'Nj', chars: "\u01CB", }, { base: 'O', chars: "\u24C4\uFF2F\xD2\xD3\xD4\u1ED2\u1ED0\u1ED6\u1ED4\xD5\u1E4C\u022C\u1E4E\u014C\u1E50\u1E52\u014E\u022E\u0230\xD6\u022A\u1ECE\u0150\u01D1\u020C\u020E\u01A0\u1EDC\u1EDA\u1EE0\u1EDE\u1EE2\u1ECC\u1ED8\u01EA\u01EC\xD8\u01FE\u0186\u019F\uA74A\uA74C", }, { base: 'OE', chars: "\u0152", }, { base: 'OI', chars: "\u01A2", }, { base: 'OO', chars: "\uA74E", }, { base: 'OU', chars: "\u0222", }, { base: 'P', chars: "\u24C5\uFF30\u1E54\u1E56\u01A4\u2C63\uA750\uA752\uA754", }, { base: 'Q', chars: "\u24C6\uFF31\uA756\uA758\u024A", }, { base: 'R', chars: "\u24C7\uFF32\u0154\u1E58\u0158\u0210\u0212\u1E5A\u1E5C\u0156\u1E5E\u024C\u2C64\uA75A\uA7A6\uA782", }, { base: 'S', chars: "\u24C8\uFF33\u1E9E\u015A\u1E64\u015C\u1E60\u0160\u1E66\u1E62\u1E68\u0218\u015E\u2C7E\uA7A8\uA784", }, { base: 'T', chars: "\u24C9\uFF34\u1E6A\u0164\u1E6C\u021A\u0162\u1E70\u1E6E\u0166\u01AC\u01AE\u023E\uA786", }, { base: 'Th', chars: "\u00DE", }, { base: 'TZ', chars: "\uA728", }, { base: 'U', chars: "\u24CA\uFF35\xD9\xDA\xDB\u0168\u1E78\u016A\u1E7A\u016C\xDC\u01DB\u01D7\u01D5\u01D9\u1EE6\u016E\u0170\u01D3\u0214\u0216\u01AF\u1EEA\u1EE8\u1EEE\u1EEC\u1EF0\u1EE4\u1E72\u0172\u1E76\u1E74\u0244", }, { base: 'V', chars: "\u24CB\uFF36\u1E7C\u1E7E\u01B2\uA75E\u0245", }, { base: 'VY', chars: "\uA760", }, { base: 'W', chars: "\u24CC\uFF37\u1E80\u1E82\u0174\u1E86\u1E84\u1E88\u2C72", }, { base: 'X', chars: "\u24CD\uFF38\u1E8A\u1E8C", }, { base: 'Y', chars: "\u24CE\uFF39\u1EF2\xDD\u0176\u1EF8\u0232\u1E8E\u0178\u1EF6\u1EF4\u01B3\u024E\u1EFE", }, { base: 'Z', chars: "\u24CF\uFF3A\u0179\u1E90\u017B\u017D\u1E92\u1E94\u01B5\u0224\u2C7F\u2C6B\uA762", }, { base: 'a', chars: "\u24D0\uFF41\u1E9A\u00E0\u00E1\u00E2\u1EA7\u1EA5\u1EAB\u1EA9\u00E3\u0101\u0103\u1EB1\u1EAF\u1EB5\u1EB3\u0227\u01E1\u00E4\u01DF\u1EA3\u00E5\u01FB\u01CE\u0201\u0203\u1EA1\u1EAD\u1EB7\u1E01\u0105\u2C65\u0250\u0251", }, { base: 'aa', chars: "\uA733", }, { base: 'ae', chars: "\u00E6\u01FD\u01E3", }, { base: 'ao', chars: "\uA735", }, { base: 'au', chars: "\uA737", }, { base: 'av', chars: "\uA739\uA73B", }, { base: 'ay', chars: "\uA73D", }, { base: 'b', chars: "\u24D1\uFF42\u1E03\u1E05\u1E07\u0180\u0183\u0253\u0182", }, { base: 'c', chars: "\uFF43\u24D2\u0107\u0109\u010B\u010D\u00E7\u1E09\u0188\u023C\uA73F\u2184", }, { base: 'd', chars: "\u24D3\uFF44\u1E0B\u010F\u1E0D\u1E11\u1E13\u1E0F\u0111\u018C\u0256\u0257\u018B\u13E7\u0501\uA7AA", }, { base: 'dh', chars: "\u00F0", }, { base: 'dz', chars: "\u01F3\u01C6", }, { base: 'e', chars: "\u24D4\uFF45\u00E8\u00E9\u00EA\u1EC1\u1EBF\u1EC5\u1EC3\u1EBD\u0113\u1E15\u1E17\u0115\u0117\u00EB\u1EBB\u011B\u0205\u0207\u1EB9\u1EC7\u0229\u1E1D\u0119\u1E19\u1E1B\u0247\u01DD", }, { base: 'f', chars: "\u24D5\uFF46\u1E1F\u0192", }, { base: 'ff', chars: "\uFB00", }, { base: 'fi', chars: "\uFB01", }, { base: 'fl', chars: "\uFB02", }, { base: 'ffi', chars: "\uFB03", }, { base: 'ffl', chars: "\uFB04", }, { base: 'g', chars: "\u24D6\uFF47\u01F5\u011D\u1E21\u011F\u0121\u01E7\u0123\u01E5\u0260\uA7A1\uA77F\u1D79", }, { base: 'h', chars: "\u24D7\uFF48\u0125\u1E23\u1E27\u021F\u1E25\u1E29\u1E2B\u1E96\u0127\u2C68\u2C76\u0265", }, { base: 'hv', chars: "\u0195", }, { base: 'i', chars: "\u24D8\uFF49\xEC\xED\xEE\u0129\u012B\u012D\xEF\u1E2F\u1EC9\u01D0\u0209\u020B\u1ECB\u012F\u1E2D\u0268\u0131", }, { base: 'j', chars: "\u24D9\uFF4A\u0135\u01F0\u0249", }, { base: 'k', chars: "\u24DA\uFF4B\u1E31\u01E9\u1E33\u0137\u1E35\u0199\u2C6A\uA741\uA743\uA745\uA7A3", }, { base: 'l', chars: "\u24DB\uFF4C\u0140\u013A\u013E\u1E37\u1E39\u013C\u1E3D\u1E3B\u017F\u0142\u019A\u026B\u2C61\uA749\uA781\uA747\u026D", }, { base: 'lj', chars: "\u01C9", }, { base: 'm', chars: "\u24DC\uFF4D\u1E3F\u1E41\u1E43\u0271\u026F", }, { base: 'n', chars: "\u24DD\uFF4E\u01F9\u0144\xF1\u1E45\u0148\u1E47\u0146\u1E4B\u1E49\u019E\u0272\u0149\uA791\uA7A5\u043B\u0509", }, { base: 'nj', chars: "\u01CC", }, { base: 'o', chars: "\u24DE\uFF4F\xF2\xF3\xF4\u1ED3\u1ED1\u1ED7\u1ED5\xF5\u1E4D\u022D\u1E4F\u014D\u1E51\u1E53\u014F\u022F\u0231\xF6\u022B\u1ECF\u0151\u01D2\u020D\u020F\u01A1\u1EDD\u1EDB\u1EE1\u1EDF\u1EE3\u1ECD\u1ED9\u01EB\u01ED\xF8\u01FF\uA74B\uA74D\u0275\u0254\u1D11", }, { base: 'oe', chars: "\u0153", }, { base: 'oi', chars: "\u01A3", }, { base: 'oo', chars: "\uA74F", }, { base: 'ou', chars: "\u0223", }, { base: 'p', chars: "\u24DF\uFF50\u1E55\u1E57\u01A5\u1D7D\uA751\uA753\uA755\u03C1", }, { base: 'q', chars: "\u24E0\uFF51\u024B\uA757\uA759", }, { base: 'r', chars: "\u24E1\uFF52\u0155\u1E59\u0159\u0211\u0213\u1E5B\u1E5D\u0157\u1E5F\u024D\u027D\uA75B\uA7A7\uA783", }, { base: 's', chars: "\u24E2\uFF53\u015B\u1E65\u015D\u1E61\u0161\u1E67\u1E63\u1E69\u0219\u015F\u023F\uA7A9\uA785\u1E9B\u0282", }, { base: 'ss', chars: "\xDF", }, { base: 't', chars: "\u24E3\uFF54\u1E6B\u1E97\u0165\u1E6D\u021B\u0163\u1E71\u1E6F\u0167\u01AD\u0288\u2C66\uA787", }, { base: 'th', chars: "\u00FE", }, { base: 'tz', chars: "\uA729", }, { base: 'u', chars: "\u24E4\uFF55\xF9\xFA\xFB\u0169\u1E79\u016B\u1E7B\u016D\xFC\u01DC\u01D8\u01D6\u01DA\u1EE7\u016F\u0171\u01D4\u0215\u0217\u01B0\u1EEB\u1EE9\u1EEF\u1EED\u1EF1\u1EE5\u1E73\u0173\u1E77\u1E75\u0289", }, { base: 'v', chars: "\u24E5\uFF56\u1E7D\u1E7F\u028B\uA75F\u028C", }, { base: 'vy', chars: "\uA761", }, { base: 'w', chars: "\u24E6\uFF57\u1E81\u1E83\u0175\u1E87\u1E85\u1E98\u1E89\u2C73", }, { base: 'x', chars: "\u24E7\uFF58\u1E8B\u1E8D", }, { base: 'y', chars: "\u24E8\uFF59\u1EF3\xFD\u0177\u1EF9\u0233\u1E8F\xFF\u1EF7\u1E99\u1EF5\u01B4\u024F\u1EFF", }, { base: 'z', chars: "\u24E9\uFF5A\u017A\u1E91\u017C\u017E\u1E93\u1E95\u01B6\u0225\u0240\u2C6C\uA763" }];
  
let diacriticsMap = {};
for (let i = 0; i < replacementList.length; i += 1) {
    let chars = replacementList[i].chars;
    for (let j = 0; j < chars.length; j += 1) {
        diacriticsMap[chars[j]] = replacementList[i].base;
    }
}
let diacritics = {};
diacritics.remove = str => str.replace(/[^\u0000-\u007e]/g, c => diacriticsMap[c] || c );

function mergeRange([...ranges]) {
    if (!ranges.length) return [];

    ranges.sort((fir, sec) => {
        if (fir[0] !== sec[0]) return fir[0] - sec[0];
        return fir[1] - sec[1];
    });

    const merged = [];

    let curStart = ranges[0][0];
    let curEnd = ranges[0][1];

    ranges.shift();

    ranges.forEach(([start, end]) => {
        if (start >= curEnd) {
            merged.push([curStart, curEnd]);
            curStart = start;
            curEnd = end;
        } else if (end > curEnd) curEnd = end;
    });

    merged.push([curStart, curEnd]);

    return merged;
}

function indicesOf(text, searchStringOrRegex, { caseSensitive = false, diacriticsSensitive = false } = {}) {
    if (searchStringOrRegex instanceof RegExp) {
        const re = cloneRegexp(searchStringOrRegex, { global: true });
        const indices = [];

        let match = re.exec(text);
        while (match) {
            const offset = match.index + match[0].length;
            indices.push([match.index, offset]);
            match = re.exec(text);
        }
        return indices;
    }
    const searchStringLen = searchStringOrRegex.length;

    if (searchStringLen === 0) {
        return [];
    }

    const indices = [];

    let strCpy = text;
    let searchStringCpy = searchStringOrRegex;
    if (!caseSensitive) {
        strCpy = text.toLocaleLowerCase();
        searchStringCpy = searchStringOrRegex.toLocaleLowerCase();
    }

    if (!diacriticsSensitive) {
        strCpy = diacritics.remove(strCpy);
        searchStringCpy = diacritics.remove(searchStringCpy);
    }

    let startIndex = 0;
    let index = strCpy.indexOf(searchStringCpy, startIndex);
    while (index > -1) {
        startIndex = index + searchStringLen;
        indices.push([index, startIndex]);

        index = strCpy.indexOf(searchStringCpy, index + 1);
    }

    return indices;
}

// USAGE 
// const highlightMatchesInArray = mark(value, this.searchInput.split(' '), { caseSensitive: false, diacriticsSensitive: false})
// return highlightMatchesInArray.map(string => string.isHighlighted ? `<mark class="bold">${string.text}</mark>` : string.text).join('')

export default function mark(text, queriesOrQuery, { caseSensitive = false, diacriticsSensitive = false } = {}) {
    let queries = queriesOrQuery;
    if (typeof queriesOrQuery === "string" ||queriesOrQuery instanceof RegExp) {
        queries = [queriesOrQuery];
    } else if (!Array.isArray(queriesOrQuery)) {
        if (process.env.NODE_ENV !== "production") {
            throw new Error(
                "queries must be either string, array of strings or regex."
            );
        } else {
            return [];
        }
    }

    const matches = [];

    queries.forEach(query => {
        matches.push(
            ...indicesOf(text, query, { caseSensitive, diacriticsSensitive })
        );
    });

    const highlights = mergeRange(matches);

    const chunks = [];
    let lastEnd = 0;

    highlights.forEach(([start, end], index) => {
        if (lastEnd !== start) {
            chunks.push({
                isHighlighted: false,
                text: text.slice(lastEnd, start)
            });
        }
        chunks.push({
            isHighlighted: true,
            text: text.slice(start, end),
            highlightIndex: index
        });

        lastEnd = end;
    });

    if (lastEnd !== text.length) {
        chunks.push({
            isHighlighted: false,
            text: text.slice(lastEnd)
        });
    }

    return chunks;
}