For a project of mine I would love to provide auto completion for a specific textarea. Similar to how intellisense/omnicomplete works. For that however I have to find out the absolute cursor position so that I know where the DIV should appear.
Turns out: that's (nearly I hope) impossible to achieve. Does anyone has some neat ideas how to solve that problem?
How about appending a span element to the cloning div and setting the fake cursor based on this span's offsets? I have updated your fiddle here. Also here's the JS bit only
// http://stackoverflow.com/questions/263743/how-to-get-caret-position-in-textarea
var map = [];
var pan = '<span>|</span>'
//found @ http://davidwalsh.name/detect-scrollbar-width
function getScrollbarWidth() {
var scrollDiv = document.createElement("div");
scrollDiv.className = "scrollbar-measure";
document.body.appendChild(scrollDiv);
// Get the scrollbar width
var scrollbarWidth = scrollDiv.offsetWidth - scrollDiv.clientWidth;
// Delete the DIV
document.body.removeChild(scrollDiv);
return scrollbarWidth;
}
function getCaret(el) {
if (el.selectionStart) {
return el.selectionStart;
} else if (document.selection) {
el.focus();
var r = document.selection.createRange();
if (r == null) {
return 0;
}
var re = el.createTextRange(),
rc = re.duplicate();
re.moveToBookmark(r.getBookmark());
rc.setEndPoint('EndToStart', re);
return rc.text.length;
}
return 0;
}
$(function() {
var span = $('#pos span');
var textarea = $('textarea');
var note = $('#note');
css = getComputedStyle(document.getElementById('textarea'));
try {
for (i in css) note.css(css[i]) && (css[i] != 'width' && css[i] != 'height') && note.css(css[i], css.getPropertyValue(css[i]));
} catch (e) {}
note.css('max-width', '300px');
document.getElementById('note').style.visibility = 'hidden';
var height = note.height();
var fakeCursor, hidePrompt;
textarea.on('keyup click', function(e) {
if (document.getElementById('textarea').scrollHeight > 100) {
note.css('max-width', 300 -