Drag and slide camera

Hi!

I'm trying to allow user to move camera around with simple pull and drag. So user click somewhere and pulls and camera move in other direction. So it works fine, but i would like that when user stop draging(release mouse button or finger) camera slides for some time in the direction it was heading. Also when it comes to the borders it should do nice affect like on mobile when u pull to the end.

I was wondering if something like that is out there, or any guides on how to do it. I havent found anything yet but I managed to do some code by myself.

That allows only pull and drag and does nothing when u release touch, Also no cool effect on borders, it jsut stops.

 void Update () {
         if(canMove){
             if (Input.GetMouseButtonDown(0))        
             {        
                 dragOrigin = Input.mousePosition; 
                 return;    
             }
 
             else if (Input.GetMouseButton(0)){
                 Vector3 pos = Camera.main.ScreenToViewportPoint(Input.mousePosition - dragOrigin);        
                 Vector3 move = new Vector3(-pos.x * dragSpeed, -pos.y * dragSpeed, 0);
                 transform.Translate(move, Space.World); 
                 pos=transform.localPosition;
                 dragOrigin = Input.mousePosition;
                 if(pos.x>maxx){
                     pos.x=maxx;
                     transform.localPosition=pos;
                 }
                 else if(pos.x<minx){
                     pos.x=minx;
                     transform.localPosition=pos;
                 }
                 if(pos.y>maxy){
                     pos.y=maxy;
                     transform.localPosition=pos;
                 }
                 else if(pos.y<miny){
                     pos.y=miny;
                     transform.localPosition=pos;
                 }
 
             }
 
             else if(Input.GetMouseButtonUp(0)){
                 Debug.Log("origin"+dragOrigin); 
                 Debug.Log("finish"+Input.mousePosition); 
             }
         }
     }