|
1
14
15 package com.sun.facelets.tag.ui;
16
17 import java.io.IOException  ;
18 import java.util.ArrayList ;
19 import java.util.LinkedHashMap ;
20 import java.util.List ;
21 import java.util.Map ;
22 import java.util.Map.Entry;
23
24 import javax.faces.component.UIComponentBase;
25 import javax.faces.context.FacesContext;
26 import javax.faces.context.ResponseWriter;
27 import javax.servlet.http.HttpServletResponse ;
28
29 import com.sun.facelets.util.DevTools;
30 import com.sun.facelets.util.FastWriter;
31
32
36 public final class UIDebug extends UIComponentBase {
37
38 public final static String COMPONENT_TYPE = "facelets.ui.Debug";
39 public final static String COMPONENT_FAMILY = "facelets";
40 private static long nextId = System.currentTimeMillis();
41 private final static String KEY = "facelets.ui.DebugOutput";
42 public final static String DEFAULT_HOTKEY = "D";
43 private String hotkey = DEFAULT_HOTKEY;
44
45 public UIDebug() {
46 super();
47 this.setTransient(true);
48 this.setRendered(true);
49 this.setRendererType(null);
50 }
51
52 public String getFamily() {
53 return COMPONENT_FAMILY;
54 }
55
56 public List getChildren() {
57 return new ArrayList () {
58 public boolean add(Object o) {
59 throw new IllegalStateException ("<ui:debug> does not support children");
60 }
61
62 public void add(int index, Object o) {
63 throw new IllegalStateException ("<ui:debug> does not support children");
64 }
65 };
66 }
67
68 public void encodeBegin(FacesContext faces) throws IOException {
69
70 String actionId = faces.getApplication().getViewHandler().getActionURL(faces, faces.getViewRoot().getViewId());
71
72 StringBuffer sb = new StringBuffer (512);
73 sb.append("<script language=\"javascript\" type=\"text/javascript\">\n");
74 sb.append("//<![CDATA[\n");
75 sb.append("function faceletsDebug(URL) { day = new Date(); id = day.getTime(); eval(\"page\" + id + \" = window.open(URL, '\" + id + \"', 'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=1,width=800,height=600,left = 240,top = 212');\"); };");
76 sb.append("var faceletsOrigKeyup = document.onkeyup; document.onkeyup = function(e) { if (window.event) e = window.event; if (String.fromCharCode(e.keyCode) == '" + this.getHotkey() + "' & e.shiftKey & e.ctrlKey) faceletsDebug('");
77 sb.append(actionId);
78 sb.append('?');
79 sb.append(KEY);
80 sb.append('=');
81 sb.append(writeDebugOutput(faces));
82 sb.append("'); else if (faceletsOrigKeyup) faceletsOrigKeyup(e); };\n");
83 sb.append("//]]>\n");
84 sb.append("</script>\n");
85
86 ResponseWriter writer = faces.getResponseWriter();
87 writer.write(sb.toString());
88 }
89
90 private static String writeDebugOutput(FacesContext faces) throws IOException {
91 FastWriter fw = new FastWriter();
92 DevTools.debugHtml(fw, faces);
93
94 Map session = faces.getExternalContext().getSessionMap();
95 Map debugs = (Map ) session.get(KEY);
96 if (debugs == null) {
97 debugs = new LinkedHashMap () {
98 protected boolean removeEldestEntry(Entry eldest) {
99 return (this.size() > 5);
100 }
101 };
102 session.put(KEY, debugs);
103 }
104 String id = "" + nextId++;
105 debugs.put(id, fw.toString());
106 return id;
107 }
108
109 private static String fetchDebugOutput(FacesContext faces, String id) {
110 Map session = faces.getExternalContext().getSessionMap();
111 Map debugs = (Map ) session.get(KEY);
112 if (debugs != null) {
113 return (String ) debugs.get(id);
114 }
115 return null;
116 }
117
118 public static boolean debugRequest(FacesContext faces) {
119 String id = (String ) faces.getExternalContext().getRequestParameterMap().get(KEY);
120 if (id != null) {
121 Object resp = faces.getExternalContext().getResponse();
122 if (!faces.getResponseComplete()
123 && resp instanceof HttpServletResponse ) {
124 try {
125 HttpServletResponse httpResp = (HttpServletResponse ) resp;
126 String page = fetchDebugOutput(faces, id);
127 if (page != null) {
128 httpResp.setContentType("text/html");
129 httpResp.getWriter().write(page);
130 } else {
131 httpResp.setContentType("text/plain");
132 httpResp.getWriter().write("No Debug Output Available");
133 }
134 httpResp.flushBuffer();
135 faces.responseComplete();
136 } catch (IOException e) {
137 return false;
138 }
139 return true;
140 }
141 }
142 return false;
143 }
144
145 public String getHotkey() {
146 return this.hotkey;
147 }
148
149 public void setHotkey(String hotkey) {
150 this.hotkey = (hotkey != null) ? hotkey.toUpperCase() : "";
151 }
152
153 }
154 |
Popular Tags |
Java API By Example, From Geeks To Geeks.