Ckeditor scrollbar marker / Text Position Indicator - ckeditor

Question

I would like to implement scrollbar marker into ckeditor and i can't seem to find the right way to do it i have triyed this code
var win = new CKEDITOR.dom.window( window );
var pos = win.getScrollPosition();
console.log(pos);
but it only return the google chrome scrollbar x=0 & Y=0
var win = new CKEDITOR.dom.window( domWindow );
var pos = win.getScrollPosition();
console.log(pos);
and this give me an error domWindow is not defined
i found this example it may help: https://codepen.io/Rplus/pen/mEjWJm
(() => {
var containerQS = '.article';
var container = document.querySelector(containerQS);
var form = document.querySelector('.form');
var input = form.querySelector('input[type="text"]');
var markClass = 'mark';
var markerHeight = '2px';
var _color = 'currentColor';
var containerY = container.offsetTop;
var containerH = container.scrollHeight;
var customStyle = document.createElement('style');
container.appendChild(customStyle);
var renderScrollMarker = ($parent, posArr) => {
var _posArr = posArr.map(i => {
return `transparent ${i}, ${_color} ${i}, ${_color} calc(${i} +
${markerHeight}), transparent calc(${i} + ${markerHeight})`;
});
customStyle.innerHTML = `article::-webkit-scrollbar-track {
background-image: linear-gradient(${_posArr.join()});
}`;
};
var calcEleRelativePos = ($ele) => {
return ($ele.offsetTop - containerY) / containerH;
};
var markOpt = {
className: markClass,
done: function () {
var marks = document.querySelectorAll(`.${markClass}`);
var allY = [].map.call(marks, (mark) => {
return (calcEleRelativePos(mark) * 100).toFixed(2) + '%';
});
renderScrollMarker(container, allY);
console.log(allY);
}
};
var instance = new Mark(container);
form.addEventListener('submit', (e) => {
e.preventDefault();
var _text = input.value.trim();
console.log(_text, form.oldText);
if (_text === '') {
instance.unmark(markOpt);
return;
}
form.oldText = _text;
instance.unmark().mark(_text, markOpt);
});
// trigger
form.querySelector('input[type="submit"]').click();
})();
but as ckeditor secures a lot of element, i would love to know if any one has done this before with CKeditor

Answer 1

i just got the real editor scrollbar position, i only need to put a marker using style or any availble methode
var win=CKEDITOR.instances.editor1.document.getWindow();
var pos = win.getScrollPosition().y;
console.log(pos);

Answer 2

this worked for me :
var jqDocument = $(editor.document.$);
var documentHeight = jqDocument.height();
var scrollTo =jqDocument.scrollTop();
var docHeight = jqDocument.height();
var scrollPercent = (scroll)/(docHeight);
var scrollPercentRounded = Math.round(scrollPercent*100);
$(".ui-slider-handle").css("bottom", 100-scrollPercentRounded+"%");