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32
33 package websphinx.workbench;
34
35 import websphinx.*;
36 import java.awt.*;
37 import rcm.awt.Constrain;
38 import rcm.awt.PopupDialog;
39
40 public class CrawlerEditor extends Panel {
41
42 Crawler crawler;
43
44 Label domainLabel;
45 Choice domainChoice;
46
47 Label typeLabel;
48 Choice typeChoice;
49
50 Label urlLabel;
51 TextComponent urlField;
52
53 Label depthLabel;
54 Label depthLabel2;
55 TextComponent depthField;
56
57 Choice searchOrderChoice;
58
59 public CrawlerEditor () {
60 setLayout (new GridBagLayout ());
61
62 Constrain.add (this, domainLabel = new Label("Crawl:"), Constrain.labelLike (0, 0));
63 Constrain.add (this, domainChoice = new Choice (), Constrain.labelLike (1, 0, 2));
64 domainChoice.addItem ("the subtree");
65 domainChoice.addItem ("the server");
66 domainChoice.addItem ("the Web");
67
68 Constrain.add (this, typeLabel = new Label("Using:"), Constrain.labelLike (3, 0));
69 Constrain.add (this, typeChoice = new Choice (), Constrain.fieldLike (4, 0));
70 typeChoice.addItem ("hyperlinks");
71 typeChoice.addItem ("images+hyperlinks");
72 typeChoice.addItem ("all links");
73
74 Constrain.add (this, urlLabel = new Label ("Starting URLs:"), Constrain.labelLike (0, 1));
75 Constrain.add (this, urlField = new TextArea(3, 40), Constrain.areaLike (1, 1, 4));
76
77 Constrain.add (this, depthLabel = new Label ("Depth:"), Constrain.labelLike (0, 2));
78 Constrain.add (this, depthField = new TextField (4), Constrain.fieldLike (1, 2));
79 Constrain.add (this, depthLabel2 = new Label (" hops"), Constrain.labelLike (2, 2));
80 Constrain.add (this, searchOrderChoice = new Choice (), Constrain.fieldLike (4, 2));
81 searchOrderChoice.addItem ("Depth first");
82 searchOrderChoice.addItem ("Breadth first");
83 }
84
85 public boolean handleEvent (Event event) {
86 if (event.id == Event.ACTION_EVENT) {
87 if (event.target == domainChoice)
88 configureDomain ();
89 else if (event.target == urlField)
90 configureURL ();
91 else if (event.target == depthField)
92 configureDepth ();
93 else if (event.target == searchOrderChoice)
94 configureDepthFirst ();
95 else
96 return super.handleEvent (event);
97 }
98 else if (event.id == Event.LOST_FOCUS) {
99 if (event.target == urlField)
100 configureURL ();
101 else if (event.target == depthField)
102 configureDepth ();
103 else
104 return super.handleEvent (event);
105 }
106 else
107 return super.handleEvent (event);
108
109 return true;
110 }
111
112 public void setCrawler (Crawler crawler) {
113 this.crawler = crawler;
114
115 String  [] domain = crawler.getDomain ();
116 if (domain == Crawler.SERVER)
117 domainChoice.select (1);
118 else if (domain == Crawler.SUBTREE)
119 domainChoice.select (0);
120 else
121 domainChoice.select (2);
122
123 String [] type = crawler.getLinkType ();
124 if (type == Crawler.HYPERLINKS_AND_IMAGES)
125 typeChoice.select (1);
126 else if (type == Crawler.ALL_LINKS)
127 typeChoice.select (2);
128 else
129 typeChoice.select (0);
130
131 urlField.setText (crawler.getRootHrefs ());
132 depthField.setText (String.valueOf (crawler.getMaxDepth ()));
133 searchOrderChoice.select (crawler.getDepthFirst () ? 0 : 1);
134 }
135
136 public Crawler getCrawler () {
137 if (configureDomain ()
138 && configureType ()
139 && configureURL ()
140 && configureDepth ()
141 && configureDepthFirst ())
142 return crawler;
143 else
144 return null;
145 }
146
147 boolean configureDomain () {
148 switch (domainChoice.getSelectedIndex ()) {
149 case 2: crawler.setDomain (Crawler.WEB);
151 break;
152 case 1: crawler.setDomain (Crawler.SERVER);
154 break;
155 case 0: crawler.setDomain (Crawler.SUBTREE);
157 break;
158 default:
159 throw new RuntimeException ("unknown state " + domainChoice.getSelectedIndex ());
160 }
161 return true;
162 }
163
164 boolean configureType () {
165 switch (typeChoice.getSelectedIndex ()) {
166 case 0:
167 crawler.setLinkType (Crawler.HYPERLINKS);
168 break;
169 case 1:
170 crawler.setLinkType (Crawler.HYPERLINKS_AND_IMAGES);
171 break;
172 case 2:
173 crawler.setLinkType (Crawler.ALL_LINKS);
174 break;
175 default:
176 throw new RuntimeException ("unknown state " + typeChoice.getSelectedIndex ());
177 }
178 return true;
179 }
180
181 String lastURL = null;
182
183 boolean configureURL () {
184 String hrefs = urlField.getText();
185 try {
186 crawler.setRootHrefs (hrefs);
187 lastURL = hrefs;
188 return true;
189 } catch (java.net.MalformedURLException ex) {
190 if (lastURL == null || !lastURL.equals (hrefs)) {
191 PopupDialog.warn (this, "Error", "Improperly formed URL:\n" + hrefs);
192 urlField.selectAll ();
193 urlField.requestFocus ();
194 }
195 lastURL = hrefs;
196 return false;
197 }
198 }
199
200 String lastDepth = null;
201
202 boolean configureDepth () {
203 String depth = depthField.getText ();
204 try {
205 crawler.setMaxDepth (Integer.parseInt (depth));
206 lastDepth = depth;
207 return true;
208 } catch (NumberFormatException ex) {
209 if (lastDepth == null || !lastDepth.equals (depth)) {
210 PopupDialog.warn (this, "Error", "Depth must be an integer");
211 depthField.selectAll ();
212 depthField.requestFocus ();
213 }
214 lastDepth = depth;
215 return false;
216 }
217 }
218
219 boolean configureDepthFirst () {
220 crawler.setDepthFirst (searchOrderChoice.getSelectedIndex () == 0);
221 return true;
222 }
223 }
224 |
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