1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19
20 package org.apache.myfaces.tobago.internal.component;
21
22 import org.apache.myfaces.tobago.util.FacesVersion;
23
24 import javax.faces.component.UIComponentBase;
25 import javax.faces.component.UIViewRoot;
26 import javax.faces.context.FacesContext;
27 import javax.faces.event.ComponentSystemEvent;
28 import javax.faces.event.ListenerFor;
29 import javax.faces.event.PostAddToViewEvent;
30 import javax.faces.event.PreRenderViewEvent;
31
32 /**
33 * {@link org.apache.myfaces.tobago.internal.taglib.component.ScriptTagDeclaration}
34 *
35 * @since 3.0.0
36 */
37 @ListenerFor(systemEventClass = PostAddToViewEvent.class)
38 public abstract class AbstractUIScript extends UIComponentBase {
39
40 @Override
41 public void processEvent(final ComponentSystemEvent event) {
42
43 super.processEvent(event);
44
45 if (event instanceof PreRenderViewEvent) {
46 addComponentResource();
47 } else if (event instanceof PostAddToViewEvent) {
48 if (FacesVersion.supports21() || !FacesVersion.isMyfaces()) {
49 // MyFaces core is removing the component resources in head if the view will be recreated before rendering.
50 // The view will be recreated because of expressions. For example expressins in the ui:include src attribute
51 // The PostAddToViewEvent will not be broadcasted in this case again.
52 // A subscription to the PreRenderViewEvent avoids this problem
53 // NOTE: PreRenderViewEvent can not used in myfaces prior 2.0.3 using PostAddToView for all myfaces 2.0 versions
54 getFacesContext().getViewRoot().subscribeToEvent(PreRenderViewEvent.class, this);
55 } else {
56 addComponentResource();
57 }
58 }
59 }
60
61 private void addComponentResource() {
62 final FacesContext facesContext = getFacesContext();
63 final UIViewRoot root = facesContext.getViewRoot();
64 root.addComponentResource(facesContext, this);
65 }
66
67 public abstract String getFile();
68 public abstract void setFile(String file);
69
70 public abstract String getType();
71 public abstract void setType(String type);
72 }