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1
11 package org.eclipse.help.internal.webapp.data;
12
13 import java.io.BufferedReader  ;
14 import java.io.IOException ;
15 import java.io.InputStream ;
16 import java.io.InputStreamReader ;
17 import java.io.Reader ;
18 import java.io.Writer ;
19 import java.util.StringTokenizer ;
20 import java.util.regex.Matcher ;
21 import java.util.regex.Pattern ;
22
23 import javax.servlet.ServletContext ;
24 import javax.servlet.http.HttpServletRequest ;
25 import javax.servlet.http.HttpServletResponse ;
26
27 import org.eclipse.help.HelpSystem;
28 import org.eclipse.help.IToc;
29 import org.eclipse.help.ITopic;
30 import org.eclipse.help.internal.HelpPlugin;
31 import org.eclipse.help.internal.search.HTMLDocParser;
32 import org.eclipse.help.internal.webapp.HelpWebappPlugin;
33
34
37 public class PrintData extends RequestData {
38
39 private static final Pattern PATTERN_HEADING = Pattern.compile("<body.*?>[\\s]*?([\\w])", Pattern.MULTILINE | Pattern.DOTALL | Pattern.CASE_INSENSITIVE);
42 private static final Pattern PATTERN_LINK = Pattern.compile("(src|href)=\"(.*?\")", Pattern.MULTILINE | Pattern.DOTALL | Pattern.CASE_INSENSITIVE);
45
48 public PrintData(ServletContext context, HttpServletRequest request, HttpServletResponse response) {
49 super(context, request, response);
50 }
51
52
55 public String getTitle() {
56 return getTopic().getLabel();
57 }
58
59
62 public String getTocHref() {
63 return getToc().getHref();
64 }
65
66
69 public String getTopicHref() {
70 return getTopic().getHref();
71 }
72
73
76 public void generateToc(Writer out) throws IOException {
77 out.write("<div id=\"toc\">"); out.write("<h1>"); out.write(getTitle());
80 out.write("</h1>"); out.write("<h2>"); out.write(ServletResources.getString("TocHeading", request)); out.write("</h2>"); out.write("<div id=\"toc_content\">"); ITopic topic = getTopic();
86 ITopic[] subtopics = topic.getSubtopics();
87 for (int i=0;i<subtopics.length;++i) {
88 generateToc(subtopics[i], String.valueOf(i + 1), out);
89 }
90 out.write("</div>"); out.write("</div>"); }
93
94
97 private void generateToc(ITopic topic, String sectionId, Writer out) throws IOException {
98 out.write("<div class=\"toc_" + (sectionId.length() > 2 ? "sub" : "") + "entry\">"); out.write(sectionId + ". " + "<a HREF=\"#section" + sectionId + "\">" + topic.getLabel() + "</a>"); ITopic[] subtopics = topic.getSubtopics();
101 for (int i=0;i<subtopics.length;++i) {
102 String subsectionId = sectionId + "." + (i + 1); generateToc(subtopics[i], subsectionId, out);
104 }
105 out.write("</div>"); }
107
108
111 public void generateContent(Writer out) throws IOException {
112 generateContent(getTopic(), null, out);
113 }
114
115
118 private void generateContent(ITopic topic, String sectionId, Writer out) throws IOException {
119 String href = topic.getHref();
120 if (href != null) {
121 String pathHref = href.substring(0, href.lastIndexOf('/') + 1);
123 String baseHref = "http://" + request.getServerName() + ":" + request.getServerPort() + request.getContextPath() + "/topic" + pathHref; String content = getContent(href, locale);
125
126 if (sectionId != null) {
128 content = injectHeading(content, sectionId);
129 }
130 content = normalizeHrefs(content, baseHref);
131 out.write(content);
132 }
133 ITopic[] subtopics = topic.getSubtopics();
134 for (int i=0;i<subtopics.length;++i) {
135 String subsectionId = (sectionId != null ? sectionId + "." : "") + (i + 1); generateContent(subtopics[i], subsectionId, out);
137 }
138 }
139
140
143 private String injectHeading(String content, String sectionId) {
144 Matcher matcher = PATTERN_HEADING.matcher(content);
145 if (matcher.find()) {
146 String heading = "<a id=\"section" + sectionId + "\">" + sectionId + ". </a>"; return content.substring(0, matcher.start(1)) + heading + content.substring(matcher.start(1));
148 }
149 return content;
150 }
151
152
156 private String normalizeHrefs(String content, String baseHref) {
157 StringBuffer buf = new StringBuffer ();
158 Matcher matcher = PATTERN_LINK.matcher(content);
159 int prev = 0;
160 while (matcher.find()) {
161 buf.append(content.substring(prev, matcher.start(2)));
162 buf.append(baseHref);
163 buf.append(matcher.group(2));
164 prev = matcher.end();
165 }
166 buf.append(content.substring(prev));
167 return buf.toString();
168 }
169
170
173 private String getContent(String href, String locale) {
174 InputStream in = HelpSystem.getHelpContent(href, locale);
175 StringBuffer buf = new StringBuffer ();
176 if (in != null) {
177 try {
178 String charset = HTMLDocParser.getCharsetFromHTML(in);
179 if (charset == null) {
180 charset = "UTF-8"; }
182 in = HelpSystem.getHelpContent(href, locale);
183 Reader reader = new BufferedReader (new InputStreamReader (in, charset));
184 char[] cbuf = new char[4096];
185 int num;
186 while ((num = reader.read(cbuf)) > 0) {
187 buf.append(cbuf, 0, num);
188 }
189 }
190 catch (Exception e) {
191 String msg = "Error retrieving print preview content for " + href; HelpWebappPlugin.logError(msg, e);
193 }
194 finally {
195 try {
196 in.close();
197 }
198 catch (Exception e) {}
199 }
200 }
201 return buf.toString();
202 }
203
204
207 private IToc getToc() {
208 String tocParam = request.getParameter("toc"); if (tocParam != null && tocParam.length() > 0) {
210 return HelpPlugin.getTocManager().getToc(tocParam, getLocale());
211 }
212 String topicParam = request.getParameter("topic"); if (topicParam != null && topicParam.length() > 0) {
214 if (topicParam.startsWith("/../nav/")) { String navPath = topicParam.substring(8);
216 StringTokenizer tok = new StringTokenizer (navPath, "_"); int index = Integer.parseInt(tok.nextToken());
218 return HelpPlugin.getTocManager().getTocs(getLocale())[index];
219 }
220 IToc[] tocs = HelpPlugin.getTocManager().getTocs(getLocale());
221 for (int i=0;i<tocs.length;++i) {
222 if (tocs[i].getTopic(topicParam) != null) {
223 return tocs[i];
224 }
225 }
226 }
227 return null;
228 }
229
230
233 private ITopic getTopic() {
234 String topicParam = request.getParameter("topic"); if (topicParam != null && topicParam.length() > 0) {
236 if (topicParam.startsWith("/../nav/")) { String navPath = topicParam.substring(8);
238 StringTokenizer tok = new StringTokenizer (navPath, "_"); int index = Integer.parseInt(tok.nextToken());
240 ITopic topic = HelpPlugin.getTocManager().getTocs(getLocale())[index].getTopic(null);
241 while (tok.hasMoreTokens()) {
242 index = Integer.parseInt(tok.nextToken());
243 topic = topic.getSubtopics()[index];
244 }
245 return topic;
246 }
247 else {
248 IToc[] tocs = HelpPlugin.getTocManager().getTocs(getLocale());
249 for (int i=0;i<tocs.length;++i) {
250 ITopic topic = tocs[i].getTopic(topicParam);
251 if (topic != null) {
252 return topic;
253 }
254 topic = tocs[i].getTopic(null);
256 if (topicParam.equals(topic.getHref())) {
257 return topic;
258 }
259 }
260 }
261 return null;
262 }
263 return getToc().getTopic(null);
264 }
265 }
266 |
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