getCaretPosition

by jrweinb

HTML

<p>Lorem ipsum dolor sit amet, consetetur sadipscing elitr,
sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat,
sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum.
Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.</p>
<div id="caretPos"></div>

JavaScript

function getCaretCharacterOffsetWithin(element) {
    var caretOffset = 0;
    var doc = element.ownerDocument || element.document;
    var win = doc.defaultView || doc.parentWindow;
    var sel;
    if (typeof win.getSelection != "undefined") {
        var range = win.getSelection().getRangeAt(0);
        var preCaretRange = range.cloneRange();
        preCaretRange.selectNodeContents(element);
        preCaretRange.setEnd(range.endContainer, range.endOffset);
        caretOffset = preCaretRange.toString().length;
    } else if ( (sel = doc.selection) && sel.type != "Control") {
        var textRange = sel.createRange();
        var preCaretTextRange = doc.body.createTextRange();
        preCaretTextRange.moveToElementText(element);
        preCaretTextRange.setEndPoint("EndToEnd", textRange);
        caretOffset = preCaretTextRange.text.length;
    }
    return caretOffset;
}


function insertBreakAtPoint(e) {

    var range;
    var textNode;
    var offset;

    // standard
    if (document.caretPositionFromPoint) {
        range = document.caretPositionFromPoint(e.pageX, e.pageY);
        textNode = range.offsetNode;
        offset = range.offset;
        console.log(e);
        console.log(e.pageX);
        
    // WebKit
    } else if (document.caretRangeFromPoint) {
        range = document.caretRangeFromPoint(e.pageX, e.pageY);
        textNode = range.startContainer;
        offset = range.startOffset;
        console.log(e);
        console.log(e.pageX);
        
    }

    // only split TEXT_NODEs
    if (textNode.nodeType == 3) {
         console.log($(textNode));
        var replacement = textNode.splitText(offset);
        var br = document.createElement('br');
        textNode.parentNode.insertBefore(br, replacement);
       
    }
    var caretPosEl = document.getElementById("caretPos");
    caretPosEl.innerHTML = "Range: " + range + " | textNode: " + textNode.nodeType + " | offset: " + offset;
}

var paragraphs =...