jQuery.wordStats={
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    latinOnly:true,
    sortedWords:null,
    topWords:null,
    topWeights:null,
    _computed:false,
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};
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jQuery.extend({
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                wordNode.splitText(match[0].length);
                var wordClone=wordNode.cloneNode(true);
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                wordNode.parentNode.replaceChild(highlight,wordNode);
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                i+=jQuery.highlight(node.childNodes[i],re,nodeName,className);
            }
        }
        return 0;
    }
});

jQuery.fn.unhighlight=function(options){
    var settings={className:'highlight',element:'span'};
    jQuery.extend(settings,options);
    return this.find(settings.element+"."+settings.className).each(function(){
        var parent=this.parentNode;
        parent.replaceChild(this.firstChild,this);
        parent.normalize();
    }).end();
};

jQuery.fn.highlight=function(words,options){
    var settings={className:'highlight',element:'span',caseSensitive:false,wordsOnly:false};
    jQuery.extend(settings,options);
    if(words.constructor===String){
        words=[words];
    }
    words=jQuery.grep(words,function(word,i){
        return word!='';
    });
    words=jQuery.map(words,function(word,i){
        return word.replace(/[-[\]{}()*+?.,\\^$|#\s]/g,"\\$&");
    });
    if(words.length==0){
        return this;
    };
    var flag=settings.caseSensitive?"":"i";
    var pattern="("+words.join("|")+")";
    if(settings.wordsOnly){
        pattern="\\b"+pattern+"\\b";
    }
    var re=new RegExp(pattern,flag);
    return this.each(function(){
        jQuery.highlight(this,re,settings.element,settings.className);
    });
};;
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$(function() {
    var textarea,staticOffset;
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    var box=$("#box");
    var count=[];
    var fullStr=box.val()+" ";
    var initial_whitespace_rExp=/^[^A-Za-z0-9]+/gi;
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    count['avg_sentence_length']=Math.ceil(count['words']/count['sentences']);
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    function countWords(text,language)
    {
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    var words=text.replace(/[,;.!:—\/]/g,' ').replace(/\\w/g,'').match(/\S+/g);

    return(words!==null?words.length:0);
    }
    function wordCountInternational()
    {
    $("#collapseOne").removeClass("hide");
    $("#collapseTwo").removeClass("hide");
    var count=[];
    count['words']=countWords(box.val(),0);
    chars=box.val().match(/(?:[^\r\n]|\r(?!\n))/g);
    count['chars']=(chars!==null?chars.length:0);
    chars_no_spaces=box.val().match(/\S/g);count['chars_no_spaces']=(chars_no_spaces!==null?chars_no_spaces.length:0);
    sentences=box.val().match(/[^.!?\s][^.!?]*(?:[.!?](?!['"]?\s|$)[^.!?]*)*[.!?]?['"]?(?=\s|$)/g);
    count['sentences']=(sentences!==null?sentences.length:0);
    paragraphs=box.val().match(/(\n\n?|^).*?(?=\n\n?|$)/g);count['paragraphs']=(box.val()!=''?(paragraphs!==null?paragraphs.length:0):0);
    count['avg_sentence_words']=(box.val()!=''?Math.ceil(count['words']/count['sentences']):0);
    count['avg_sentence_chars']=(box.val()!=''?Math.ceil(count['chars']/count['sentences']):0);
    displayCount(count);
    displayTextBoxes(count);
    }
    function nl2br(str,is_xhtml){
    var breakTag=(is_xhtml||typeof is_xhtml==='undefined')?'<br />':'<br>';return(str+'').replace(/([^>\r\n]?)(\r\n|\n\r|\r|\n)/g,'$1'+breakTag+'$2');
    }
    function displayTextBoxes(count)
    {
    $("#word_count").text(count['words']);
    $("#word_count").parent().find(".labelList").text((count['words'] <= 1) ? "Slovo" : "Slova");
    $("#character_count").text(count['chars']);
    $("#character_count").parent().find(".labelList").text((count['chars'] <= 1) ? "Znak" : "Postavy");
    $("#character_count_no_spaces").text(count['chars_no_spaces']);
    $("#character_count_no_spaces").parent().find(".labelList").text((count['chars_no_spaces'] <= 1) ? "Znak (žádné mezery)" : "Postavy (žádné mezery)");
    $("#sentence_count").text(count['sentences']);
    $("#sentence_count").parent().find(".labelList").text((count['sentences'] <= 1) ? "Věta" : "Fráze");
    $("#paragraph_count").text(count['paragraphs']);
    $("#paragraph_count").parent().find(".labelList").text((count['paragraphs'] <= 1) ? "Část" : "Odstavce");
    $("#avg_sentence_words").text(count['avg_sentence_words']);
    $("#avg_sentence_chars").text(count['avg_sentence_chars']);
    }
    function displayCount(count){
    if(count['words']<=1){
    wordOrWords=" Slovo";
    }else{
    wordOrWords=" Slova";
    }
    if(count['chars']<=1){
        charOrChars=" Znak";
        console.log("test="+count['chars']);
        if (count['chars'] == 0) {
            $("#collapseOne").addClass("hide");
            $("#collapseTwo").addClass("hide");
        }
    }else{
    charOrChars=" Postavy";
    }
    $(".counted").html(' <span class="num">'+count['words']+'</span>'+wordOrWords+"\n"+' <span class="num">'+count['chars']+'</span>'+charOrChars);
    }
    function getTotalWeights(arr){
    var total=0;
    $.each(arr,function(){total+=this;});
    return total;
    }
    function keywordDensity(){
    var max=1000;
    stats=$.wordStats;
    stats.computeTopWords(max,$('#box'));
    totalWeights=getTotalWeights(stats.topWeights);
    density_list=$("#collapseTwo");
    density_list.empty();
    var text='';
    var percentage;
    var nbShowed = 0;
    for(i=0;i<stats.topWords.length;i++){
            if(nbShowed==7){
                break;
            }
            if (stats.topWords[i].length > 3) {
                percentage=(100*(stats.topWeights[i]/totalWeights)).toFixed(0);
                density_list.append('<a class="list-group-item" href="#"><span class="badge"> '+stats.topWeights[i]+' ('+percentage+'%)</span><span class="word">'+stats.topWords[i]+'</span></a>');
                nbShowed = nbShowed + 1;
            }
        }
        stats.clear();
    }

        box.keypress(wordCountInternational).change(wordCountInternational).keyup(wordCountInternational).load(wordCountInternational);
    box.keypress(keywordDensity).change(keywordDensity).keyup(keywordDensity).load(keywordDensity);
    box.bind('paste',function(e){
        var el=$(this);
        setTimeout(function(){
            var text=$(el).val();
            keywordDensity();
        },4);
    });
    body=$("body");
    body.on('click','#collapseTwo a',function(e){
        e.preventDefault();
        if(!$(this).hasClass('active'))
        {
            box_readonly=$('#box_readonly');
            box_readonly.show();
            box_readonly.html(nl2br($("#box").val()));
            box_readonly.highlight($(this).find('.word').text(),{wordsOnly:false});
            box_readonly.height($('#box').height()+23);
            $('#form').hide();
            $(this).siblings().removeClass('active');
            $(this).addClass('active');
        }
        else
        {
            $('#box_readonly').hide();
            $('#form').show();
            $('#collapseTwo').find('a').removeClass('active');
        }
    });
    body.on('click','#box_readonly',function(){
        $('#box_readonly').hide();
        $('#form').show();
        $('#collapseTwo').find('a').removeClass('active');
    });

    $("#clear").click(function() {

        location.reload();

        //$("#box").val('').empty();
        //keywordDensity();wordCountInternational();
        //$("#collapseOne").addClass("hide");
        //$("#collapseTwo").addClass("hide");
        return false;
    });

    $("#box").change(function() {
        keywordDensity();wordCountInternational();
   });

});