| 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.net.URL;
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| 7 |
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| 8 | import org.openstreetmap.josm.Main;
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| 9 | import org.openstreetmap.josm.tools.LanguageInfo.LocaleType;
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| 10 |
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| 11 | /**
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| 12 | * Read a trac-wiki page.
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| 13 | *
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| 14 | * @author imi
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| 15 | */
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| 16 | public class WikiReader {
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| 17 |
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| 18 | private final String baseurl;
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| 19 |
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| 20 | public WikiReader(String baseurl) {
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| 21 | this.baseurl = baseurl;
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| 22 | }
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| 23 |
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| 24 | /**
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| 25 | * Constructs a new {@code WikiReader}.
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| 26 | */
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| 27 | public WikiReader() {
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| 28 | this.baseurl = Main.pref.get("help.baseurl", Main.JOSM_WEBSITE);
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| 29 | }
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| 30 |
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| 31 | /**
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| 32 | * Read the page specified by the url and return the content.
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| 33 | *
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| 34 | * If the url is within the baseurl path, parse it as an trac wikipage and replace relative
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| 35 | * pathes etc..
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| 36 | *
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| 37 | * @throws IOException Throws, if the page could not be loaded.
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| 38 | */
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| 39 | public String read(String url) throws IOException {
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| 40 | URL u = new URL(url);
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| 41 | BufferedReader in = Utils.openURLReader(u);
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| 42 | try {
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| 43 | if (url.startsWith(baseurl) && !url.endsWith("?format=txt"))
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| 44 | return readFromTrac(in, u);
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| 45 | return readNormal(in);
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| 46 | } finally {
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| 47 | Utils.close(in);
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| 48 | }
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| 49 | }
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| 50 |
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| 51 | public String readLang(String text) throws IOException {
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| 52 | String languageCode;
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| 53 | String res = "";
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| 54 |
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| 55 | languageCode = LanguageInfo.getWikiLanguagePrefix(LocaleType.DEFAULTNOTENGLISH);
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| 56 | if(languageCode != null) {
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| 57 | res = readLang(new URL(baseurl + "/wiki/" + languageCode + text));
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| 58 | }
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| 59 |
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| 60 | if(res.isEmpty()) {
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| 61 | languageCode = LanguageInfo.getWikiLanguagePrefix(LocaleType.BASELANGUAGE);
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| 62 | if(languageCode != null) {
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| 63 | res = readLang(new URL(baseurl + "/wiki/" + languageCode + text));
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| 64 | }
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| 65 | }
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| 66 |
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| 67 | if(res.isEmpty()) {
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| 68 | languageCode = LanguageInfo.getWikiLanguagePrefix(LocaleType.ENGLISH);
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| 69 | if(languageCode != null) {
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| 70 | res = readLang(new URL(baseurl + "/wiki/" + languageCode + text));
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| 71 | }
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| 72 | }
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| 73 |
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| 74 | if(res.isEmpty()) {
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| 75 | throw new IOException(text + " does not exist");
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| 76 | } else {
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| 77 | return res;
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| 78 | }
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| 79 | }
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| 80 |
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| 81 | private String readLang(URL url) throws IOException {
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| 82 | BufferedReader in = Utils.openURLReader(url);
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| 83 | try {
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| 84 | return readFromTrac(in, url);
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| 85 | } finally {
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| 86 | Utils.close(in);
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| 87 | }
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| 88 | }
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| 89 |
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| 90 | private String readNormal(BufferedReader in) throws IOException {
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| 91 | StringBuilder b = new StringBuilder();
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| 92 | for (String line = in.readLine(); line != null; line = in.readLine()) {
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| 93 | if (!line.contains("[[TranslatedPages]]")) {
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| 94 | b.append(line.replaceAll(" />", ">")).append("\n");
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| 95 | }
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| 96 | }
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| 97 | return "<html>" + b + "</html>";
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| 98 | }
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| 99 |
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| 100 | protected String readFromTrac(BufferedReader in, URL url) throws IOException {
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| 101 | boolean inside = false;
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| 102 | boolean transl = false;
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| 103 | boolean skip = false;
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| 104 | String b = "";
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| 105 | String full = "";
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| 106 | for (String line = in.readLine(); line != null; line = in.readLine()) {
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| 107 | full += line;
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| 108 | if (line.contains("<div id=\"searchable\">")) {
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| 109 | inside = true;
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| 110 | } else if (line.contains("<div class=\"wiki-toc trac-nav\"")) {
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| 111 | transl = true;
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| 112 | } else if (line.contains("<div class=\"wikipage searchable\">")) {
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| 113 | inside = true;
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| 114 | } else if (line.contains("<div class=\"buttons\">")) {
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| 115 | inside = false;
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| 116 | } else if (line.contains("<h3>Attachments</h3>")) {
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| 117 | inside = false;
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| 118 | } else if (line.contains("<div id=\"attachments\">")) {
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| 119 | inside = false;
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| 120 | } else if (line.contains("<div class=\"trac-modifiedby\">")) {
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| 121 | skip = true;
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| 122 | }
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| 123 | if (inside && !transl && !skip) {
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| 124 | // add a border="0" attribute to images, otherwise the internal help browser
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| 125 | // will render a thick border around images inside an <a> element
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| 126 | //
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| 127 | b += line.replaceAll("<img ", "<img border=\"0\" ")
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| 128 | .replaceAll("<span class=\"icon\">.</span>", "")
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| 129 | .replaceAll("href=\"/", "href=\"" + baseurl + "/")
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| 130 | .replaceAll(" />", ">")
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| 131 | + "\n";
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| 132 | } else if (transl && line.contains("</div>")) {
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| 133 | transl = false;
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| 134 | }
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| 135 | if (line.contains("</div>")) {
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| 136 | skip = false;
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| 137 | }
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| 138 | }
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| 139 | if (b.indexOf(" Describe ") >= 0
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| 140 | || b.indexOf(" does not exist. You can create it here.</p>") >= 0)
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| 141 | return "";
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| 142 | if(b.isEmpty())
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| 143 | b = full;
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| 144 | return "<html><base href=\""+url.toExternalForm() +"\"> " + b + "</html>";
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| 145 | }
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| 146 | }
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