| 1 | // License: GPL. Copyright 2007 by Immanuel Scholz and others |
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| 2 | package org.openstreetmap.josm.tools; |
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| 3 | |
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| 4 | import java.io.BufferedReader; |
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| 5 | import java.io.IOException; |
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| 6 | import java.io.InputStream; |
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| 7 | import java.io.InputStreamReader; |
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| 8 | import java.net.URL; |
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| 9 | |
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| 10 | import org.openstreetmap.josm.Main; |
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| 11 | |
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| 12 | /** |
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| 13 | * Read a trac-wiki page. |
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| 14 | * |
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| 15 | * @author imi |
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| 16 | */ |
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| 17 | public class WikiReader { |
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| 18 | |
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| 19 | private final String baseurl; |
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| 20 | |
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| 21 | public WikiReader(String baseurl) { |
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| 22 | this.baseurl = baseurl; |
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| 23 | } |
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| 24 | |
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| 25 | public WikiReader() { |
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| 26 | this.baseurl = Main.pref.get("help.baseurl", "http://josm.openstreetmap.de"); |
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| 27 | } |
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| 28 | |
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| 29 | /** |
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| 30 | * Read the page specified by the url and return the content. |
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| 31 | * |
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| 32 | * If the url is within the baseurl path, parse it as an trac wikipage and replace relative |
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| 33 | * pathes etc.. |
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| 34 | * |
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| 35 | * @return |
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| 36 | * @throws IOException Throws, if the page could not be loaded. |
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| 37 | */ |
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| 38 | public String read(String url) throws IOException { |
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| 39 | BufferedReader in = new BufferedReader(new InputStreamReader(new URL(url).openStream(), "utf-8")); |
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| 40 | if (url.startsWith(baseurl) && !url.endsWith("?format=txt")) |
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| 41 | return readFromTrac(in); |
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| 42 | return readNormal(in); |
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| 43 | } |
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| 44 | |
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| 45 | public String readLang(String text) throws IOException { |
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| 46 | String languageCode = LanguageInfo.getWikiLanguagePrefix(); |
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| 47 | String res = readLang(new URL(baseurl + "/wiki/" + languageCode + text)); |
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| 48 | if (res.isEmpty() && !languageCode.isEmpty()) { |
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| 49 | res = readLang(new URL(baseurl + "/wiki/" + text)); |
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| 50 | } |
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| 51 | if (res.isEmpty()) { |
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| 52 | throw new IOException(text + " does not exist"); |
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| 53 | } else { |
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| 54 | return res; |
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| 55 | } |
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| 56 | } |
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| 57 | |
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| 58 | private String readLang(URL url) throws IOException { |
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| 59 | InputStream in = url.openStream(); |
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| 60 | return readFromTrac(new BufferedReader(new InputStreamReader(in, "utf-8"))); |
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| 61 | } |
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| 62 | |
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| 63 | private String readNormal(BufferedReader in) throws IOException { |
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| 64 | String b = ""; |
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| 65 | for (String line = in.readLine(); line != null; line = in.readLine()) { |
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| 66 | if (!line.contains("[[TranslatedPages]]")) { |
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| 67 | b += line.replaceAll(" />", ">") + "\n"; |
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| 68 | } |
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| 69 | } |
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| 70 | return "<html>" + b + "</html>"; |
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| 71 | } |
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| 72 | |
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| 73 | private String readFromTrac(BufferedReader in) throws IOException { |
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| 74 | boolean inside = false; |
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| 75 | boolean transl = false; |
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| 76 | boolean skip = false; |
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| 77 | String b = ""; |
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| 78 | for (String line = in.readLine(); line != null; line = in.readLine()) { |
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| 79 | if (line.contains("<div id=\"searchable\">")) { |
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| 80 | inside = true; |
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| 81 | } else if (line.contains("<div class=\"wiki-toc trac-nav\"")) { |
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| 82 | transl = true; |
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| 83 | } else if (line.contains("<div class=\"wikipage searchable\">")) { |
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| 84 | inside = true; |
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| 85 | } else if (line.contains("<div class=\"buttons\">")) { |
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| 86 | inside = false; |
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| 87 | } else if (line.contains("<h3>Attachments</h3>")) { |
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| 88 | inside = false; |
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| 89 | } else if (line.contains("<div id=\"attachments\">")) { |
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| 90 | inside = false; |
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| 91 | } else if (line.contains("<div class=\"trac-modifiedby\">")) { |
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| 92 | skip = true; |
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| 93 | } |
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| 94 | if (inside && !transl && !skip) { |
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| 95 | // add a border="0" attribute to images, otherwise the internal help browser |
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| 96 | // will render a thick border around images inside an <a> element |
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| 97 | // |
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| 98 | b += line.replaceAll("<img src=\"/", "<img border=\"0\" src=\"" + baseurl + "/").replaceAll("href=\"/", |
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| 99 | "href=\"" + baseurl + "/").replaceAll(" />", ">") |
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| 100 | + "\n"; |
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| 101 | } else if (transl && line.contains("</div>")) { |
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| 102 | transl = false; |
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| 103 | } |
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| 104 | if (line.contains("</div>")) { |
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| 105 | skip = false; |
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| 106 | } |
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| 107 | } |
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| 108 | if (b.indexOf(" Describe ") >= 0 |
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| 109 | || b.indexOf(" does not exist. You can create it here.</p>") >= 0) |
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| 110 | return ""; |
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| 111 | return "<html>" + b + "</html>"; |
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| 112 | } |
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| 113 | } |
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