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Java > Open Source Codes > com > google > gwt > core > client > Impl


1 /*
2  * Copyright 2006 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.core.client;
17
18 final class Impl {
19
20   private static int sNextHashId = 0;
21
22   protected static int getNextHashId() {
23     return ++sNextHashId;
24   }
25
26   /*
27    * We need a separate overload for JavaScriptObject, so that the hosted mode
28    * JSNI invocation system will know to unwrap the Java object back to its
29    * underlying JavaScript object.
30    */
31   static native int getHashCode(JavaScriptObject o) /*-{
32     return (o == null) ? 0 :
33      (o.$H ? o.$H : (o.$H = @com.google.gwt.core.client.Impl::getNextHashId()()));
34   }-*/;
35
36   static native int getHashCode(Object JavaDoc o) /*-{
37     return (o == null) ? 0 :
38      (o.$H ? o.$H : (o.$H = @com.google.gwt.core.client.Impl::getNextHashId()()));
39   }-*/;
40
41   static native String JavaDoc getHostPageBaseURL() /*-{
42     var s = $doc.location.href;
43
44     // Pull off any hash.
45     var i = s.indexOf('#');
46     if (i != -1)
47       s = s.substring(0, i);
48
49     // Pull off any query string.
50     i = s.indexOf('?');
51     if (i != -1)
52       s = s.substring(0, i);
53
54     // Rip off everything after the last slash.
55     i = s.lastIndexOf('/');
56     if (i != -1)
57       s = s.substring(0, i);
58       
59     // Ensure a final slash if non-empty.
60     return s.length > 0 ? s + "/" : "";
61   }-*/;
62
63   static native String JavaDoc getModuleBaseURL() /*-{
64     return $moduleBase;
65   }-*/;
66
67   static native String JavaDoc getModuleName() /*-{
68     return $moduleName;
69   }-*/;
70 }
71
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