1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.help;
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3 |
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4 | import java.awt.Component;
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5 | import java.util.Locale;
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6 |
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7 | import javax.swing.AbstractButton;
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8 | import javax.swing.Action;
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9 | import javax.swing.JComponent;
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10 | import javax.swing.JMenu;
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11 | import javax.swing.KeyStroke;
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12 |
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13 | import org.openstreetmap.josm.Main;
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14 | import org.openstreetmap.josm.actions.HelpAction;
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15 | import org.openstreetmap.josm.tools.LanguageInfo;
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16 |
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17 | public class HelpUtil {
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18 |
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19 | /**
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20 | * Replies the base wiki URL.
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21 | *
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22 | * @return the base wiki URL
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23 | */
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24 | static public String getWikiBaseUrl() {
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25 | return Main.pref.get("help.baseurl", "http://josm.openstreetmap.de");
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26 | }
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27 |
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28 | /**
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29 | * Replies the base wiki URL for help pages
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30 | *
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31 | * @return the base wiki URL for help pages
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32 | */
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33 | static public String getWikiBaseHelpUrl() {
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34 | return getWikiBaseUrl() + "/wiki";
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35 | }
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36 |
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37 | /**
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38 | * Replies the URL on the wiki for an absolute help topic. The URL is encoded in UTF-8.
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39 | *
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40 | * @param absoluteHelpTopic the absolute help topic
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41 | * @return the url
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42 | * @see #buildAbsoluteHelpTopic(String)
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43 | * @see #buildAbsoluteHelpTopic(String, Locale)
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44 | */
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45 | static public String getHelpTopicUrl(String absoluteHelpTopic) {
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46 | String ret = getWikiBaseHelpUrl();
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47 | ret = ret.replaceAll("\\/+$", "");
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48 | absoluteHelpTopic =absoluteHelpTopic.replace(" ", "%20");
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49 | absoluteHelpTopic = absoluteHelpTopic.replaceAll("^\\/+", "/");
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50 | return ret + absoluteHelpTopic;
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51 | }
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52 |
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53 | /**
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54 | * Replies the URL to the edit page for the absolute help topic.
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55 | *
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56 | * @param absoluteHelpTopic the absolute help topic
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57 | * @return the URL to the edit page
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58 | */
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59 | static public String getHelpTopicEditUrl(String absoluteHelpTopic) {
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60 | String topicUrl = getHelpTopicUrl(absoluteHelpTopic);
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61 | topicUrl = topicUrl.replaceAll("#[^#]*$", ""); // remove optional fragment
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62 | return topicUrl + "?action=edit";
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63 | }
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64 |
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65 | /**
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66 | * Extracts the relative help topic from an URL. Replies null, if
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67 | * no relative help topic is found.
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68 | *
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69 | * @param url the url
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70 | * @return the relative help topic in the URL, i.e. "/Action/New"
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71 | */
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72 | static public String extractRelativeHelpTopic(String url) {
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73 | String topic = extractAbsoluteHelpTopic(url);
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74 | if (topic == null) return null;
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75 | String pattern = "/[A-Z][a-z]:" + getHelpTopicPrefix(Locale.ENGLISH).replaceAll("^\\/+", "");
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76 | if (url.matches(pattern))
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77 | return topic.substring(pattern.length());
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78 | return null;
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79 | }
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80 |
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81 | /**
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82 | * Extracts the absolute help topic from an URL. Replies null, if
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83 | * no absolute help topic is found.
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84 | *
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85 | * @param url the url
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86 | * @return the absolute help topic in the URL, i.e. "/De:Help/Action/New"
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87 | */
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88 | static public String extractAbsoluteHelpTopic(String url) {
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89 | if (!url.startsWith(getWikiBaseHelpUrl())) return null;
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90 | url = url.substring(getWikiBaseHelpUrl().length());
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91 | String prefix = getHelpTopicPrefix(Locale.ENGLISH);
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92 | if (url.startsWith(prefix))
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93 | return url;
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94 |
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95 | String pattern = "/[A-Z][a-z]:" + prefix.replaceAll("^\\/+", "");
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96 | if (url.matches(pattern))
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97 | return url;
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98 |
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99 | return null;
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100 | }
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101 |
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102 | /**
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103 | * Replies the help topic prefix for the current locale. Examples:
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104 | * <ul>
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105 | * <li>/Help if the current locale is a locale with language "en"</li>
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106 | * <li>/De:Help if the current locale is a locale with language "de"</li>
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107 | * </ul>
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108 | *
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109 | * @return the help topic prefix
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110 | * @see #getHelpTopicPrefix(Locale)
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111 | */
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112 | static public String getHelpTopicPrefix() {
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113 | return getHelpTopicPrefix(Locale.getDefault());
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114 | }
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115 |
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116 | /**
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117 | * Replies the help topic prefix for the given locale. Examples:
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118 | * <ul>
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119 | * <li>/Help if the locale is a locale with language "en"</li>
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120 | * <li>/De:Help if the locale is a locale with language "de"</li>
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121 | * </ul>
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122 | *
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123 | * @param locale the locale. {@see Locale#ENGLISH} assumed, if null.
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124 | * @return the help topic prefix
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125 | * @see #getHelpTopicPrefix(Locale)
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126 | */
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127 | static public String getHelpTopicPrefix(Locale locale) {
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128 | if (locale == null) {
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129 | locale = Locale.ENGLISH;
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130 | }
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131 | String ret = Main.pref.get("help.pathhelp", "/Help");
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132 | ret = ret.replaceAll("^\\/+", ""); // remove leading /
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133 | ret = "/" + LanguageInfo.getWikiLanguagePrefix(locale) + ret;
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134 | return ret;
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135 | }
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136 |
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137 | /**
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138 | * Replies the absolute, localized help topic for the given topic.
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139 | *
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140 | * Example: for a topic "/Dialog/RelationEditor" and the locale "de", this method
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141 | * replies "/De:Help/Dialog/RelationEditor"
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142 | *
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143 | * @param topic the relative help topic. Home help topic assumed, if null.
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144 | * @param locale the locale. {@see Locale#ENGLISH} assumed, if null.
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145 | * @return the absolute, localized help topic
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146 | */
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147 | static public String buildAbsoluteHelpTopic(String topic, Locale locale) {
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148 | if (locale == null) {
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149 | locale = Locale.ENGLISH;
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150 | }
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151 | if (topic == null || topic.trim().length() == 0 || topic.trim().equals("/"))
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152 | return getHelpTopicPrefix(locale);
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153 | String ret = getHelpTopicPrefix(locale);
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154 | if (topic.startsWith("/")) {
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155 | ret += topic;
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156 | } else {
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157 | ret += "/" + topic;
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158 | }
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159 | ret = ret.replaceAll("\\/+", "\\/"); // just in case, collapse sequences of //
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160 | return ret;
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161 | }
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162 |
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163 | /**
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164 | * Replies the absolute, localized help topic for the given topic and the
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165 | * current locale.
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166 | *
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167 | * @param topic the relative help topic. Home help topic assumed, if null.
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168 | * @return the absolute, localized help topic
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169 | * @see Locale#getDefault()
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170 | * @see #buildAbsoluteHelpTopic(String, Locale)
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171 | */
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172 | static public String buildAbsoluteHelpTopic(String topic) {
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173 | return buildAbsoluteHelpTopic(topic, Locale.getDefault());
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174 | }
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175 |
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176 | /**
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177 | * Replies the context specific help topic configured for <code>context</code>.
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178 | *
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179 | * @return the help topic. null, if no context specific help topic is found
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180 | */
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181 | static public String getContextSpecificHelpTopic(Object context) {
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182 | if (context == null)
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183 | return null;
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184 | if (context instanceof Helpful)
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185 | return ((Helpful)context).helpTopic();
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186 | if (context instanceof JMenu) {
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187 | JMenu b = (JMenu)context;
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188 | if (b.getClientProperty("help") != null)
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189 | return (String)b.getClientProperty("help");
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190 | return null;
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191 | }
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192 | if (context instanceof AbstractButton) {
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193 | AbstractButton b = (AbstractButton)context;
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194 | if (b.getClientProperty("help") != null)
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195 | return (String)b.getClientProperty("help");
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196 | return getContextSpecificHelpTopic(b.getAction());
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197 | }
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198 | if (context instanceof Action)
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199 | return (String)((Action)context).getValue("help");
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200 | if (context instanceof JComponent && ((JComponent)context).getClientProperty("help") != null)
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201 | return (String)((JComponent)context).getClientProperty("help");
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202 | if (context instanceof Component)
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203 | return getContextSpecificHelpTopic(((Component)context).getParent());
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204 | return null;
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205 | }
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206 |
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207 | /**
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208 | * Replies the global help action, if available. Otherwise, creates an instance
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209 | * of {@see HelpAction}.
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210 | *
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211 | * @return
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212 | */
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213 | static private Action getHelpAction() {
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214 | try {
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215 | return Main.main.menu.help;
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216 | } catch(NullPointerException e) {
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217 | return new HelpAction();
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218 | }
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219 | }
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220 |
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221 | /**
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222 | * Makes a component aware of context sensitive help.
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223 | *
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224 | * A relative help topic doesn't start with /Help and doesn't include a locale
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225 | * code. Example: /Dialog/RelationEditor is a relative help topic, /De:Help/Dialog/RelationEditor
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226 | * is not.
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227 | *
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228 | * @param component the component the component
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229 | * @param topic the help topic. Set to the default help topic if null.
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230 | */
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231 | static public void setHelpContext(JComponent component, String relativeHelpTopic) {
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232 | if (relativeHelpTopic == null) {
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233 | relativeHelpTopic = "/";
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234 | }
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235 | component.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke("F1"), "help");
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236 | component.getActionMap().put("help", getHelpAction());
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237 | component.putClientProperty("help", relativeHelpTopic);
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238 | }
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239 |
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240 | /**
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241 | * This is a simple marker method for help topic literals. If you declare a help
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242 | * topic literal in the source you should enclose it in ht(...).
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243 | *
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244 | * <strong>Example</strong>
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245 | * <pre>
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246 | * String helpTopic = ht("/Dialog/RelationEditor");
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247 | * or
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248 | * putValue("help", ht("/Dialog/RelationEditor"));
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249 | * </pre>
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250 | *
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251 | *
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252 | * @param helpTopic
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253 | */
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254 | static public String ht(String helpTopic) {
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255 | // this is just a marker method
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256 | return helpTopic;
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257 | }
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258 | }
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