HTML Editor for Google Drive

function _dragElement20220124_init_(){
	var a=document.getElementsByTagName("DIV");
	if(!a || a.length==0)return;
	for(var i = 0; i < a.length; i++){    
		if(a[i].id && a[i].id.indexOf("_textbox20220124_")==0){
			_dragElement20220124_(a[i]);
		}
	}
}
function _dragElement20220124_(elmnt){
  if(!elmnt)return;
  elmnt.onmousedown=dragMouseDown;
  function dragMouseDown(e) {
    e = e || window.event; if(!e)return;
	//console.log(e);
	var b2=e.target || e.srcElement;
	//console.log(b2.tagName, b2.className);
	if(!b2 || !/^(div|span)$/i.test(b2.tagName) || (b2.className || '').indexOf('resizer')>=0)return;			
	if(e.button==1 || (e.button==2 && (e.ctrlKey || e.altKey))){
		var answer=confirm("Do you want to remove this textbox?");
		if(!answer)return;
		document.onmousemove=null;
		if(elmnt.parentNode) elmnt.parentNode.removeChild(elmnt);
		return;
	}else if(e.button!=0){
		return;
	}
    //e.preventDefault();
    pos3 = e.clientX;
    pos4 = e.clientY;
    document.onmouseup = closeDragElement;
    document.onmousemove = elementDrag;
	elmnt.style.cursor="move";
  }
  function elementDrag(e) {
    e = e || window.event;
    e.preventDefault();
    pos1 = pos3 - e.clientX;
    pos2 = pos4 - e.clientY;
    pos3 = e.clientX;
    pos4 = e.clientY;
    elmnt.style.top = (elmnt.offsetTop - pos2) + "px";
    elmnt.style.left = (elmnt.offsetLeft - pos1) + "px";
	elmnt.style.cursor="move";
 }
  function closeDragElement() {
    document.onmouseup = null;
    document.onmousemove = null;
	elmnt.style.cursor="";
  }
}

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