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1
5 package com.tonbeller.wcf.popup;
6
7 import java.util.ArrayList  ;
8 import java.util.Iterator ;
9 import java.util.List ;
10
11 import org.w3c.dom.Document ;
12 import org.w3c.dom.Element ;
13
14 import com.tonbeller.wcf.component.Renderable;
15 import com.tonbeller.wcf.controller.RequestContext;
16 import com.tonbeller.wcf.utils.DomUtils;
17 import com.tonbeller.wcf.utils.XmlUtils;
18
19 public class PopUp implements Renderable {
20 private String label;
21 private String image;
22 private String id = DomUtils.randomId();
23
24 private List items = new ArrayList ();
25
26 public PopUp() {
27 }
28
29 public void addItem(Item item) {
30 items.add(item);
31 }
32
33
36 private abstract class Switch {
37 abstract void handleGroupItem(GroupItem g);
38
39 abstract void handleMenuItem(MenuItem m);
40
41 void handleItem(Item it) {
42 if (it == null)
43 return;
44 if (it instanceof GroupItem)
45 handleGroupItem((GroupItem) it);
46 else
47 handleMenuItem((MenuItem) it);
48 }
49
50 void handleList(List list) {
51 for (Iterator it = list.iterator(); it.hasNext();) {
52 handleItem((Item) it.next());
53 }
54 }
55
56 }
57
58 private class EmptySwitch extends Switch {
59 boolean empty = true;
60
61 void handleGroupItem(GroupItem g) {
62 handleList(g.getChildren());
63 }
64
65 void handleMenuItem(MenuItem m) {
66 empty = false;
67 }
68
69 public boolean isEmpty() {
70 return empty;
71 }
72 }
73
74 private boolean isEmpty(List list) {
75 EmptySwitch es = new EmptySwitch();
76 es.handleList(list);
77 return es.isEmpty();
78 }
79
80 private class Renderer extends Switch {
81 private Element parent;
82 private int level;
83
84 Renderer(Element parent, int level) {
85 this.parent = parent;
86 this.level = level;
87 }
88
89 void handleGroupItem(GroupItem item) {
90 if (isEmpty(item.getChildren()))
91 return;
92 Element elem = DomUtils.appendElement(parent, "popup-group");
93 setItemAttrs(elem, item);
94 Renderer r = new Renderer(elem, level + 1);
95 r.handleList(item.getChildren());
96 }
97
98 void handleMenuItem(MenuItem item) {
99 Element elem = DomUtils.appendElement(parent, "popup-item");
100 setItemAttrs(elem, item);
101 elem.setAttribute("href", item.getHref());
102 }
103
104 private void setItemAttrs(Element elem, Item item) {
105 elem.setAttribute("level", "" + level);
106 if (item.getLabel() != null)
107 elem.setAttribute("label", item.getLabel());
108 if (item.getImage() != null)
109 elem.setAttribute("image", item.getImage());
110 }
111 }
112
113 public Element render(Document factory) {
114 if (isEmpty(items))
115 return null;
116 Element popup = factory.createElement("popup-menu");
117 popup.setAttribute("id", id);
118 if (label != null)
119 popup.setAttribute("label", label);
120 if (image != null)
121 popup.setAttribute("image", image);
122 Renderer r = new Renderer(popup, 0);
123 r.handleList(items);
124 return popup;
125 }
126
127 public Document render(RequestContext context) throws Exception {
128 Document dom = XmlUtils.createDocument();
129 Element root = render(dom);
130 dom.appendChild(root);
131 return dom;
132 }
133
134 public String getImage() {
135 return image;
136 }
137
138 public void setImage(String image) {
139 this.image = image;
140 }
141
142 public String getLabel() {
143 return label;
144 }
145
146 public void setLabel(String label) {
147 this.label = label;
148 }
149
150 public String getId() {
151 return id;
152 }
153
154 public void setId(String id) {
155 this.id = id;
156 }
157 }
158 |
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