// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

part of html;
$ANNOTATIONS
class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
  factory $CLASSNAME(String type, Window view, int detail, int screenX,
      int screenY, int clientX, int clientY, int button, [bool canBubble = true,
      bool cancelable = true, bool ctrlKey = false, bool altKey = false,
      bool shiftKey = false, bool metaKey = false,
      EventTarget relatedTarget = null]) =>
      _$(CLASSNAME)FactoryProvider.create$CLASSNAME(
          type, view, detail, screenX, screenY,
          clientX, clientY, button, canBubble, cancelable,
          ctrlKey, altKey, shiftKey, metaKey,
          relatedTarget);
$!MEMBERS

  int get offsetX {
  if (JS('bool', '!!#.offsetX', this)) {
      return JS('int', '#.offsetX', this);
    } else {
      // Firefox does not support offsetX.
      var target = this.target;
      if (!(target is Element)) {
        throw new UnsupportedError(
            'offsetX is only supported on elements');
      }
      return this.clientX - this.target.getBoundingClientRect().left;
    }
  }

  int get offsetY {
    if (JS('bool', '!!#.offsetY', this)) {
      return JS('int', '#.offsetY', this);
    } else {
      // Firefox does not support offsetY.
      var target = this.target;
      if (!(target is Element)) {
        throw new UnsupportedError(
            'offsetY is only supported on elements');
      }
      return this.clientY - this.target.getBoundingClientRect().top;
    }
  }
}