String search + unlatinize

strSearch + unlatinize

{
    "terms": {
        "search": "tração",
        "text": "Concentração prévia tração centrado"
    },
    "found": true,
    "result": [
        {
            "str": "Concen",
            "isMatch": false
        },
        {
            "str": "tração",
            "isMatch": true
        },
        {
            "str": " prévia ",
            "isMatch": false
        },
        {
            "str": "tração",
            "isMatch": true
        },
        {
            "str": " centrado",
            "isMatch": false
        }
    ]
}

strSearch.js

(function(window, document, undefined){
    var strSearch = function() {
            var originalSearch = 'tração',
                search = unlatinize(originalSearch),
                originalText = 'Concentração prévia tração centrado',
                text = unlatinize(originalText),
                searchResult = {
                    terms: {
                        search: originalSearch,
                        text: originalText
                    },
                    found: !!~text.indexOf(search),
                    result: [] //{str: '...', match: true|false}
                },
                findMatch = function(lastpos){
                    var result = text.split(search);
                    
                    result.forEach(function(item, i, arr){
                        
                        searchResult.result.push({
                            str: originalText.substr(arr.slice(0,i).join('').length + i*search.length, item.length),
                            isMatch: false
                        });
                        if (i < arr.length-1) {
                            searchResult.result.push({
                                str: originalSearch,
                                isMatch: true
                            });    
                        }
                    });
                    
                    return searchResult;
                };
            
            
            
            log(findMatch());
        },
        log = function(result){
            if (document.getElementById('log')) {
                document.getElementById('log').textContent = JSON.stringify(result, false, '    ');
            }
            console.log(result);
        },
        unlatinize = function(text){
            var k, l,
                maps = [
                    [/[àáâãäå]/g, 'a'],
                    [/[ç]/g, 'c'],
                    [/[èéêë]/g, 'e'],
                    [/[ìíîï]/g, 'i'],
                    [/[ñ]/g, 'n'],
                    [/[òóôõö]/g, 'o'],
                    [/[ùúûü]/g, 'u']
                ];
            
            for (k = 0, l = maps.length; k < l; k++) {
                text = text.replace(maps[k][0], maps[k][1]);
            }
            
            return text;
        };

    strSearch();
})(window, document);