player jump on mousedown and swipe

hello,

My requirement is like this. Player should jump on mousedown. Player should jump on swipe up side. Player should come down on swipe down side.

The problem is that, when i swipe down side my mouse down code is executed and player jumps.

can anybody help me?

here is my code.

 private void DetectTouch()
     {
         if (Input.GetMouseButtonDown(0))  
     {
         Jump();
             startPosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
     }
      
 
         if (Input.GetMouseButton(0))
     {
             endPosition = Camera.main.ScreenToWorldPoint(Input.mousePosition)
     }
 
 
         if (Input.GetMouseButtonUp(0) && !isJumping)
         {
             if ((startPosition.y - endPosition.y) < 0)
                 Jump();
             else if (startPosition.y - endPosition.y > 0)
                 Down();
         }
     }