1 /**
2 * This file Copyright (c) 2012-2014 Magnolia International
3 * Ltd. (http://www.magnolia-cms.com). All rights reserved.
4 *
5 *
6 * This file is dual-licensed under both the Magnolia
7 * Network Agreement and the GNU General Public License.
8 * You may elect to use one or the other of these licenses.
9 *
10 * This file is distributed in the hope that it will be
11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12 * implied warranty of MERCHANTABILITY or FITNESS FOR A
13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14 * Redistribution, except as permitted by whichever of the GPL
15 * or MNA you select, is prohibited.
16 *
17 * 1. For the GPL license (GPL), you can redistribute and/or
18 * modify this file under the terms of the GNU General
19 * Public License, Version 3, as published by the Free Software
20 * Foundation. You should have received a copy of the GNU
21 * General Public License, Version 3 along with this program;
22 * if not, write to the Free Software Foundation, Inc., 51
23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24 *
25 * 2. For the Magnolia Network Agreement (MNA), this file
26 * and the accompanying materials are made available under the
27 * terms of the MNA which accompanies this distribution, and
28 * is available at http://www.magnolia-cms.com/mna.html
29 *
30 * Any modifications to this file must keep this entire header
31 * intact.
32 *
33 */
34 package info.magnolia.ui.vaadin.gwt.client.editor.jsni;
35
36 import com.google.gwt.dom.client.IFrameElement;
37 import com.google.gwt.event.logical.shared.ValueChangeEvent;
38 import com.google.gwt.event.logical.shared.ValueChangeHandler;
39 import com.google.gwt.event.shared.HandlerRegistration;
40 import com.google.gwt.user.client.ui.Frame;
41
42 /**
43 * ReadyStateWatch. Unused, maybe usable for IE.
44 */
45 public class ReadyStateWatch {
46 /**
47 * Enum.
48 */
49 public static enum ReadyState {
50 COMPLETE {
51 @Override
52 public String toString() {
53 return "complete";
54 }
55 },
56 LOADING {
57 @Override
58 public String toString() {
59 return "loading";
60 }
61 },
62 INTERACTIVE {
63 @Override
64 public String toString() {
65 return "interactive";
66 }
67 },
68 UNINITIALIZED {
69 @Override
70 public String toString() {
71 return "uninitialized";
72 }
73 }
74 }
75
76 Frame iframe;
77
78 public ReadyStateWatch(Frame iframe) {
79 this.iframe = iframe;
80 addNativeReadyStateWatch(this, iframe.getElement().<IFrameElement>cast());
81 }
82
83 public HandlerRegistration addReadyStateChangeHandler(ValueChangeHandler<ReadyState> handler) {
84 return iframe.addHandler(handler, ValueChangeEvent.getType());
85 }
86
87 public ReadyState getReadyState() {
88 try {
89 return ReadyState.valueOf(iframe.getElement().getPropertyString("readyState"));
90 } catch (Exception e) {
91 return null;
92 }
93 }
94
95 // used in native function
96 private void fireReadyStateChange() {
97 iframe.fireEvent(new ValueChangeEvent<ReadyState>(getReadyState()) {
98 });
99 }
100
101 private static native void addNativeReadyStateWatch(ReadyStateWatch self, IFrameElement e) /*-{
102
103 var element = e;
104 var handleStateChange = function(){
105 self.@info.magnolia.ui.vaadin.gwt.client.editor.jsni.ReadyStateWatch::fireReadyStateChange()();
106 };
107 if (element.addEventListener) {
108 element.addEventListener("onreadystatechange", handleStateChange, false);
109 }else if (element.attachEvent) {
110 element.attachEvent("onreadystatechange",handleStateChange);
111 }else{
112 element.onreadystatechange=handleStateChange;
113 }
114 }-*/;
115 }