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32
33 package websphinx.workbench;
34
35 import java.awt.*;
36 import websphinx.*;
37 import rcm.awt.Constrain;
38
39 public class LinkPredicateEditor extends Panel {
41 LinkFeatureChoice choice;
42
43
46 public LinkPredicateEditor () {
47 setLayout (new GridBagLayout ());
48 choice = new LinkFeatureChoice ();
49 Constrain.add (this, choice, Constrain.labelLike (0, 0));
50 Constrain.add (this, choice.getArgs(), Constrain.areaLike (0, 1));
51 setLinkPredicate (null);
52 }
53
54 public void setLinkPredicate (LinkPredicate pred) {
55 choice.setLinkPredicate (pred);
56 }
57
58 public LinkPredicate getLinkPredicate () {
59 return choice.getLinkPredicate ();
60 }
61
62 }
63
64 class LinkFeatureChoice extends FeatureChoice {
65 LinkFeatureArgs args = new LinkFeatureArgs ();
66
67 final static String  NULL_FEATURE = "all links";
68 final static String URL_FEATURE = "URL";
69 final static String HTML_FEATURE = "HTML tag";
70 final static String TEXT_FEATURE = "anchor text";
71 final static String LABEL_FEATURE = "labels";
72 final static String SCRIPT_FEATURE = "script";
73
74 public LinkFeatureChoice () {
75 addItem (NULL_FEATURE);
76 addItem (LABEL_FEATURE);
77 addItem (URL_FEATURE);
78 addItem (TEXT_FEATURE);
79 addItem (HTML_FEATURE);
80 addItem (SCRIPT_FEATURE);
81 }
82
83 public Panel getArgs () {
84 return args;
85 }
86
87 public void setLinkPredicate (LinkPredicate pred) {
88 LinkPredicate neg = null;
89 if (pred instanceof DualPredicate) {
90 neg = (LinkPredicate)((DualPredicate)pred).getNegativePredicate ();
91 pred = (LinkPredicate)((DualPredicate)pred).getPositivePredicate ();
92 }
93
94 if (pred == null) {
95 select (NULL_FEATURE);
96 }
97 else if (pred instanceof URLPredicate) {
98 URLPredicate urlpred = (URLPredicate)pred;
99 URLPredicate urlneg = (URLPredicate)neg;
100 select (URL_FEATURE);
101 args.setURLPattern (urlpred.getPattern ().toString());
102 args.setURLNegPattern (urlneg != null
103 ? urlneg.getPattern ().toString ()
104 : "");
105 }
106 else if (pred instanceof ContentPredicate) {
107 ContentPredicate contpred = (ContentPredicate)pred;
108 ContentPredicate contneg = (ContentPredicate)neg;
109 if (contpred.getOverHTML()) {
110 select (HTML_FEATURE);
111 args.setHTMLPattern (contpred.getPattern ().toString());
112 args.setHTMLNegPattern (contneg != null
113 ? contneg.getPattern ().toString ()
114 : "");
115 }
116 else {
117 select (TEXT_FEATURE);
118 args.setTextPattern (contpred.getPattern ().toString());
119 args.setTextNegPattern (contneg != null
120 ? contneg.getPattern ().toString ()
121 : "");
122 }
123 }
124 else if (pred instanceof LabelPredicate) {
125 LabelPredicate labelpred = (LabelPredicate)pred;
126 select (LABEL_FEATURE);
127 args.setOrTerms (labelpred.getOrTerms());
128 args.setLabels (labelpred.getLabels());
129 }
130 else if (pred instanceof Script) {
131 Script script = (Script)pred;
132 select (SCRIPT_FEATURE);
133 args.setScript (script.getScript ());
134 }
135 else {
136 select (NULL_FEATURE);
137 }
138 }
139
140 public LinkPredicate getLinkPredicate () {
141 String feat = getSelectedItem ();
142 if (feat.equals (URL_FEATURE))
143 return makeSingleOrDual (new URLPredicate (new Wildcard (args.getURLPattern())),
144 args.getURLNegPattern().length() == 0
145 ? null
146 : new URLPredicate (new Wildcard (args.getURLNegPattern())));
147 else if (feat.equals (HTML_FEATURE))
148 return makeSingleOrDual (new ContentPredicate (new Tagexp (args.getHTMLPattern()), true),
149 args.getHTMLNegPattern().length() == 0
150 ? null
151 : new ContentPredicate (new Tagexp (args.getHTMLNegPattern()), true));
152 else if (feat.equals (TEXT_FEATURE))
153 return makeSingleOrDual (new ContentPredicate (new Regexp (args.getTextPattern()), false),
154 args.getTextNegPattern().length() == 0
155 ? null
156 : new ContentPredicate (new Regexp (args.getTextNegPattern()), false));
157 else if (feat.equals (LABEL_FEATURE))
158 return new LabelPredicate (args.getLabels(), args.getOrTerms());
159 else if (feat.equals (SCRIPT_FEATURE))
160 return new Script (args.getScript (), true);
161 else
162 return null;
163 }
164
165 private static LinkPredicate makeSingleOrDual (LinkPredicate positive,
166 LinkPredicate negative) {
167 return negative == null
168 ? positive
169 : new DualPredicate (positive, negative);
170 }
171 }
172
173 class LinkFeatureArgs extends Panel {
174
175 final static String ANY_TERMS = "any";
176 final static String ALL_TERMS = "all";
177
178 TextField urlPattern;
179 TextField urlNegPattern;
180 TextField textPattern;
181 TextField textNegPattern;
182 TextField htmlPattern;
183 TextField htmlNegPattern;
184 TextField labels;
185 Choice orTerms;
186 TextArea script;
187
188 public LinkFeatureArgs () {
189 Panel panel;
190
191 setLayout (new CardLayout ());
192
193 add (LinkFeatureChoice.NULL_FEATURE, panel = new Panel ());
194
195 add (LinkFeatureChoice.URL_FEATURE, panel = Constrain.makeConstrainedPanel (1, 4));
196 Constrain.add (panel, new Label (" matches the wildcard expression "), Constrain.labelLike (0, 0));
197 Constrain.add (panel, urlPattern = new TextField (), Constrain.fieldLike (0, 1));
198 Constrain.add (panel, new Label (" but not the expression "), Constrain.labelLike (0, 2));
199 Constrain.add (panel, urlNegPattern = new TextField (), Constrain.fieldLike (0, 3));
200
201 add (LinkFeatureChoice.HTML_FEATURE, panel = Constrain.makeConstrainedPanel (1, 4));
202 Constrain.add (panel, new Label (" matches the HTML tag expression "), Constrain.labelLike (0, 0));
203 Constrain.add (panel, htmlPattern = new TextField (), Constrain.fieldLike (0, 1));
204 Constrain.add (panel, new Label (" but not the expression "), Constrain.labelLike (0, 2));
205 Constrain.add (panel, htmlNegPattern = new TextField (), Constrain.fieldLike (0, 3));
206
207 add (LinkFeatureChoice.TEXT_FEATURE, panel = Constrain.makeConstrainedPanel (1, 4));
208 Constrain.add (panel, new Label (" matches the regular expression "), Constrain.labelLike (0, 0));
209 Constrain.add (panel, textPattern = new TextField (), Constrain.fieldLike (0, 1));
210 Constrain.add (panel, new Label (" but not the expression "), Constrain.labelLike (0, 2));
211 Constrain.add (panel, textNegPattern = new TextField (), Constrain.fieldLike (0, 3));
212
213 add (LinkFeatureChoice.LABEL_FEATURE, panel = Constrain.makeConstrainedPanel (3, 2));
214 Constrain.add (panel, new Label (" include "), Constrain.labelLike (0, 0));
215 Constrain.add (panel, orTerms = new Choice (), Constrain.labelLike (1, 0));
216 orTerms.addItem (ANY_TERMS);
217 orTerms.addItem (ALL_TERMS);
218 orTerms.select (ANY_TERMS);
219 Constrain.add (panel, new Label (" of the labels "), Constrain.labelLike (2, 0));
220 Constrain.add (panel, labels = new TextField (), Constrain.fieldLike (0, 1, 3));
221
222 ScriptInterpreter interp = Context.getScriptInterpreter ();
223 if (interp != null) {
224 add (LinkFeatureChoice.SCRIPT_FEATURE,
225 panel = Constrain.makeConstrainedPanel (1, 2));
226 Constrain.add (panel, new Label (interp.getLanguage() + " Function (crawler, link)"),
227 Constrain.labelLike (0, 0));
228 Constrain.add (panel, script = new TextArea ("return true;\n"),
229 Constrain.areaLike (0, 1));
230 }
231 else {
232 add (LinkFeatureChoice.SCRIPT_FEATURE,
233 panel = Constrain.makeConstrainedPanel (1, 1));
234 Constrain.add (panel, new Label ("No scripting language is available."),
235 Constrain.labelLike (0, 0));
236 }
237 }
238
239 public void setURLPattern (String pattern) {
240 urlPattern.setText (pattern);
241 }
242
243 public String getURLPattern () {
244 return urlPattern.getText ();
245 }
246
247 public void setURLNegPattern (String pattern) {
248 urlNegPattern.setText (pattern);
249 }
250
251 public String getURLNegPattern () {
252 return urlNegPattern.getText ();
253 }
254
255 public void setTextPattern (String pattern) {
256 textPattern.setText (pattern);
257 }
258
259 public String getTextPattern () {
260 return textPattern.getText ();
261 }
262
263 public void setTextNegPattern (String pattern) {
264 textNegPattern.setText (pattern);
265 }
266
267 public String getTextNegPattern () {
268 return textNegPattern.getText ();
269 }
270
271 public void setHTMLPattern (String pattern) {
272 htmlPattern.setText (pattern);
273 }
274
275 public String getHTMLPattern () {
276 return htmlPattern.getText ();
277 }
278
279 public void setHTMLNegPattern (String pattern) {
280 htmlNegPattern.setText (pattern);
281 }
282
283 public String getHTMLNegPattern () {
284 return htmlNegPattern.getText ();
285 }
286
287 public void setLabels (String pattern) {
288 labels.setText (pattern);
289 }
290
291 public String getLabels () {
292 return labels.getText ();
293 }
294
295 public void setOrTerms (boolean orTerms) {
296 this.orTerms.select (orTerms ? ANY_TERMS : ALL_TERMS);
297 }
298
299 public boolean getOrTerms () {
300 return orTerms.getSelectedItem ().equals (ANY_TERMS);
301 }
302
303 public void setScript (String script) {
304 this.script.setText (script);
305 }
306
307 public String getScript () {
308 return script != null ? script.getText () : null;
309 }
310
311 }
312 |
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