javascript - Get parent element of a selected text

Question

Is it possible to get the parent element of a selected text in the page? For example:

<div class="someparent">

Selection of this text should refer to the 'someparent' class.

<span class="spanparent">If this is selected, the parent should be this span</span>

</div>

Because when getting the selected text, it normally gets it from the window or the document (depending on the browser) but is it that possible to get the parent element of the selected text?

Answer 1

Here's a function that will get you the innermost element that contains the whole of the user selection in all major browsers (except when multiple ranges are selected, which is only supported in Firefox. If this is important, I can expand the example to deal with that case too):

function getSelectionParentElement() {
    var parentEl = null, sel;
    if (window.getSelection) {
        sel = window.getSelection();
        if (sel.rangeCount) {
            parentEl = sel.getRangeAt(0).commonAncestorContainer;
            if (parentEl.nodeType != 1) {
                parentEl = parentEl.parentNode;
            }
        }
    } else if ( (sel = document.selection) && sel.type != "Control") {
        parentEl = sel.createRange().parentElement();
    }
    return parentEl;
}