01: /*
02: * Copyright 2007 Google Inc.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License"); you may not
05: * use this file except in compliance with the License. You may obtain a copy of
06: * the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12: * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13: * License for the specific language governing permissions and limitations under
14: * the License.
15: */
16: package com.google.gwt.user.client.ui.impl;
17:
18: import com.google.gwt.user.client.Element;
19:
20: /**
21: * Implementation of {@link com.google.gwt.user.client.ui.impl.FocusImpl}
22: * for IE that traps invalid focus attempts to match other browsers.
23: */
24: public class FocusImplIE6 extends FocusImpl {
25:
26: @Override
27: public native void focus(Element elem) /*-{
28: try {
29: elem.focus();
30: } catch (e) {
31: // Only trap the exception if the attempt was mostly legit
32: if (!elem || !elem.focus) {
33: // Rethrow the probable NPE or invalid type
34: throw e;
35: }
36: }
37: }-*/;
38:
39: }
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