js/tinymce/tinymce.jquery.js
function (editor, clientX, clientY) {
      var bodyElm = Element.fromDom(editor.getBody());
      var targetElm = editor.inline ? bodyElm : Traverse.documentElement(bodyElm);
      var transposedPoint = transpose(editor.inline, targetElm, clientX, clientY);

      return isInsideElementContentArea(targetElm, transposedPoint.x, transposedPoint.y);
    }
function (editor, clientX, clientY) {
      var bodyElm = Element.fromDom(editor.getBody());
      var targetElm = editor.inline ? bodyElm : Traverse.documentElement(bodyElm);
      var transposedPoint = transpose(editor.inline, targetElm, clientX, clientY);

      return isInsideElementContentArea(targetElm, transposedPoint.x, transposedPoint.y);
    }
function ( editor , clientX , clientY ) { var bodyElm = Element . fromDom ( editor . getBody ( ) ) ; var targetElm = editor . inline ? bodyElm : Traverse . documentElement ( bodyElm ) ; var transposedPoint = transpose ( editor . inline , targetElm , clientX , clientY ) ; return isInsideElementContentArea ( targetElm , transposedPoint . x , transposedPoint . y ) ; }
Checks if the specified coordinate is within the visual content area excluding the scrollbars
Checks if the specified coordinate is within the visual content area excluding the scrollbars