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1
11
12 package org.eclipse.help.internal.webapp.servlet;
13
14 import java.io.*;
15 import java.util.*;
16
17 import javax.servlet.http.*;
18
19 import org.eclipse.help.internal.base.HelpBasePlugin;
20 import org.eclipse.help.internal.webapp.data.*;
21
22 public class HighlightFilter implements IFilter {
23 private static final String  HIGHLIGHT_ON = "highlight-on";
25 private static final String scriptPart1 = "\n<script language=\"JavaScript\">\n<!--\nvar keywords = new Array ("; private static final String scriptPart2 = ");\nvar pluginDefault = "; private static final String scriptPart3 = ";\n-->\n</script>\n<script language=\"JavaScript\" SRC=\""; private static final String scriptPart5 = "advanced/highlight.js\"></script>\n";
30 private static final String sheetRefPart1 = "<link id=\"highlightStyle\" rel=\"STYLESHEET\" HREF=\""; private static final String sheetRefPart3 = "advanced/highlight.css\" charset=\"ISO-8859-1\" type=\"text/css\"></link>\n";
33 private static final String noHighlightScript1 = "<script language=\"JavaScript\">\n<!--\nif (parent.ContentToolbarFrame) parent.ContentToolbarFrame.setButtonState(\"toggle_highlight\",\"hidden\");\n-->\n</script>\n";
37 public OutputStream filter(HttpServletRequest req, OutputStream out) {
38 String uri = req.getRequestURI();
39 if (uri == null) {
40 return out;
41 }
42 if (!(UrlUtil.isIE(req) || UrlUtil.isMozilla(req))) {
43 return out;
44 }
45
46 Collection keywords = getWords(req);
47 if (keywords.size() == 0) {
48 try {
49 return new FilterHTMLHeadOutputStream(out, noHighlightScript1.getBytes("ASCII")); } catch (UnsupportedEncodingException uee) {
51 return out;
52 }
53 }
54 keywords = removeWildCards(keywords);
55 keywords = encodeKeyWords(keywords);
56 byte[] script = createJScript(req, keywords);
57 if (script == null) {
58 return out;
59 }
60
61 return new FilterHTMLHeadOutputStream(out, script);
62 }
63
64
70 private byte[] createJScript(HttpServletRequest req, Collection keywords) {
71 StringBuffer buf = new StringBuffer (scriptPart1);
72 StringBuffer buf2 = new StringBuffer (sheetRefPart1);
73 Iterator it = keywords.iterator();
75 if (!it.hasNext())
76 return null;
77 String keyword = (String ) it.next();
78 buf.append("\"").append(keyword).append("\""); while (it.hasNext()) {
80 keyword = (String ) it.next();
81 buf.append(", \"").append(keyword).append("\""); }
83 buf.append(scriptPart2);
84 buf.append(HelpBasePlugin.getDefault().getPluginPreferences().getBoolean(HIGHLIGHT_ON));
85 buf.append(scriptPart3);
86 String path = getPathLength(req);
88 buf.append(path);
89 buf2.append(path);
90
91 buf.append(scriptPart5);
92 buf.append(buf2.toString());
93 buf.append(sheetRefPart3);
94 try {
95 return buf.toString().getBytes("ASCII"); } catch (UnsupportedEncodingException uee) {
97 return new byte[0];
98 }
99 }
100
101 private String getPathLength(HttpServletRequest req) {
102 StringBuffer result = new StringBuffer (""); String path = req.getPathInfo();
105 if (path != null) {
106 for (int i; 0 <= (i = path.indexOf('/')); path = path
107 .substring(i + 1)) {
108 result.append("../"); }
110 }
111 return result.toString();
112 }
113
119 private Collection getWords(HttpServletRequest req) {
120 Collection tokens = new ArrayList();
122
123 String searchWord = req.getParameter("resultof"); if (searchWord == null) {
125 return tokens;
126 }
127 StringTokenizer qTokenizer = new StringTokenizer(searchWord.trim(),
129 "\"", true); boolean withinQuotation = false;
131 String quotedString = ""; while (qTokenizer.hasMoreTokens()) {
133 String curToken = qTokenizer.nextToken();
134 if (curToken.equals("\"")) { if (!withinQuotation) {
136 quotedString = ""; } else {
139 tokens.add(quotedString);
141 }
142 withinQuotation = !withinQuotation;
143 continue;
144 }
145 if (withinQuotation) {
146 tokens.add(curToken);
147 }
148 }
149
150 return tokens;
151
152 }
153
158 private Collection encodeKeyWords(Collection col) {
159 if (col == null)
160 return col;
161 Collection result = new ArrayList();
162 for (Iterator it = col.iterator(); it.hasNext();) {
163 String word = (String ) it.next();
164 int l = word.length();
165 if (l < 1)
166 continue;
167 result.add(UrlUtil.JavaScriptEncode(word));
168 }
169 return result;
170 }
171
172
178 private Collection removeWildCards(Collection col) {
179 if (col == null)
180 return col;
181
182 Collection resultPass1 = new ArrayList();
184 for (Iterator it = col.iterator(); it.hasNext();) {
185 String word = (String ) it.next();
186 int index;
187 while ((index = word.indexOf("*")) >= 0) { if (index > 0)
189 resultPass1.add(word.substring(0, index));
190 if (word.length() > index)
191 word = word.substring(index + 1);
192 }
193 if (word.length() > 0)
194 resultPass1.add(word);
195 }
196
197 Collection resultPass2 = new ArrayList();
199 for (Iterator it = resultPass1.iterator(); it.hasNext();) {
200 String word = (String ) it.next();
201 int index;
202 while ((index = word.indexOf("?")) >= 0) { if (index > 0)
204 resultPass2.add(word.substring(0, index));
205 if (word.length() > index)
206 word = word.substring(index + 1);
207 }
208 if (word.length() > 0)
209 resultPass2.add(word);
210 }
211
212 return resultPass2;
213 }
214 }
215 |
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