Highlight paragraph by line

Question

Is it possible to select only the line on which the mouse cursor hovers? Say I have this paragraph:

<p>
    Lorem ipsum dolor sit amet, consectetur adipiscing elit. 
    Nam in nisi eleifend, efficitur ligula vel, scelerisque risus. 
    Interdum et malesuada fames ac ante ipsum primis in faucibus. 
    Nam semper diam sodales eros dictum euismod. Duis ut hendrerit leo. Sed iaculis sem ac est porttitor facilisis. 
    In convallis facilisis libero ut interdum. Phasellus scelerisque ex in lacus tempus mollis. Integer scelerisque viverra elit id fringilla. Proin nibh arcu, imperdiet a lacus ac, feugiat interdum sapien. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Suspendisse ultrices vestibulum orci, a varius quam cursus ut. Nulla ut suscipit sapien. Morbi et urna elementum, pretium augue non, tristique nulla. Nulla massa tellus, facilisis at fringilla et, rutrum ac libero.
</p>

Is it possible to select the first line if I am plying on it, the second line if I hover over it, etc. etc.?

Illustration: Source: http://www.crossboweducation.us/

I am looking for a solution that will apply to multi-line paragraphs. One where I do not need to add span to each word manually.

EDIT (21.06.2016): - ( )
Rory McCrossan , Wordpress, , , . , , -, hover.css hvr-fade <p>... , , , css hover. , -...

Answer 1

. , , p span. span , offset().top. - :

$('p').html(function() {
    return $(this).text().replace(/\w+[,.]?\s+?/g, "<span>$&</span>")
});

$('p').on('mouseenter', 'span', function() {
    var $span = $(this);
    $('p span').filter(function() {
        return $(this).offset().top == $span.offset().top;
    }).toggleClass('hover');
}).on('mouseleave', 'span', function() {
    $('p span').removeClass('hover');
})

div p, p :

$('.text-block')
    .append('<div class="line-marker">&nbsp;</div>')
    .on('mousemove', function(e) {
        $(this).find('.line-marker').css('top', e.clientY);
    })

.line-marker {
    display: none;
}

.text-block:hover .line-marker {
    position: absolute;
    width: 100%;
    background-color: #CC0;
    display: block;
    z-index: -1;
}