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Java > Open Source Codes > com > google > gwt > user > client > ui > impl > FocusImplIE6


1 /*
2  * Copyright 2007 Google Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not
5  * use this file except in compliance with the License. You may obtain a copy of
6  * the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
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   public native void focus(Element elem) /*-{
27     try {
28       elem.focus();
29     } catch (e) {
30       // Only trap the exception if the attempt was mostly legit
31       if (!elem || !elem.focus) {
32         // Rethrow the probable NPE or invalid type
33         throw e;
34       }
35     }
36   }-*/;
37
38 }
39
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