001 package org.apache.turbine.services.pull.tools; 002 003 /* 004 * Licensed to the Apache Software Foundation (ASF) under one 005 * or more contributor license agreements. See the NOTICE file 006 * distributed with this work for additional information 007 * regarding copyright ownership. The ASF licenses this file 008 * to you under the Apache License, Version 2.0 (the 009 * "License"); you may not use this file except in compliance 010 * with the License. You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, 015 * software distributed under the License is distributed on an 016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 017 * KIND, either express or implied. See the License for the 018 * specific language governing permissions and limitations 019 * under the License. 020 */ 021 022 import org.apache.commons.logging.Log; 023 import org.apache.commons.logging.LogFactory; 024 import org.apache.turbine.om.security.User; 025 import org.apache.turbine.pipeline.PipelineData; 026 import org.apache.turbine.services.pull.ApplicationTool; 027 import org.apache.turbine.services.ui.TurbineUI; 028 import org.apache.turbine.services.ui.UIService; 029 import org.apache.turbine.util.RunData; 030 import org.apache.turbine.util.ServerData; 031 032 /** 033 * Manages all UI elements for a Turbine Application. Any UI element can be 034 * accessed in any template using the $ui handle (assuming you use the default 035 * PullService configuration). So, for example, you could access the background 036 * color for your pages by using $ui.bgcolor 037 * <p> 038 * This implementation provides a single level of inheritance in that if a 039 * property does not exist in a non-default skin, the value from the default 040 * skin will be used. By only requiring values different to those stored in 041 * the default skin to appear in the non-default skins the amount of memory 042 * consumed in cases where the UserManager instance is used at a non-global 043 * scope will potentially be reduced due to the fact that a shared instance of 044 * the default skin properties can be used. Note that this inheritance only 045 * applies to property values - it does not apply to any images or stylesheets 046 * that may form part of your skins. 047 * <p> 048 * This is an application pull tool for the template system. You should not 049 * use it in a normal application! Within Java code you should use TurbineUI. 050 * <p> 051 * 052 * This is an application pull tool for the template system. You should 053 * <strong>only</strong> use it in a normal application to set the skin 054 * attribute for a user (setSkin(User user, String skin)) and to initialize it 055 * for the user, otherwise use TurbineUI is probably the way to go. 056 * 057 * @author <a href="mailto:jvanzyl@periapt.com">Jason van Zyl</a> 058 * @author <a href="mailto:james_coltman@majorband.co.uk">James Coltman</a> 059 * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a> 060 * @author <a href="mailto:seade@backstagetech.com.au">Scott Eade</a> 061 * @version $Id$ 062 * @see UIService 063 */ 064 public class UITool implements ApplicationTool 065 { 066 /** Logging */ 067 private static Log log = LogFactory.getLog(UITool.class); 068 069 /** 070 * Attribute name of skinName value in User's temp hashmap. 071 */ 072 public static final String SKIN_ATTRIBUTE = UITool.class.getName()+ ".skin"; 073 074 /** 075 * The actual skin being used for the webapp. 076 */ 077 private String skinName; 078 079 /** 080 * Refresh the tool. 081 */ 082 public void refresh() 083 { 084 TurbineUI.refresh(getSkin()); 085 log.debug("UITool refreshed for skin: " + getSkin()); 086 } 087 088 /** 089 * Provide access to the list of available skin names. 090 * 091 * @return the available skin names. 092 */ 093 public String[] getSkinNames() 094 { 095 return TurbineUI.getSkinNames(); 096 } 097 098 /** 099 * Get the name of the default skin name for the web application from the 100 * TurbineResources.properties file. If the property is not present the 101 * name of the default skin will be returned. Note that the web application 102 * skin name may be something other than default, in which case its 103 * properties will default to the skin with the name "default". 104 * 105 * @return the name of the default skin for the web application. 106 */ 107 public String getWebappSkinName() 108 { 109 return TurbineUI.getWebappSkinName(); 110 } 111 112 /** 113 * Retrieve a skin property. If the property is not defined in the current 114 * skin the value for the default skin will be provided. If the current 115 * skin does not exist then the skin configured for the webapp will be used. 116 * If the webapp skin does not exist the default skin will be used. If the 117 * default skin does not exist then <code>null</code> will be returned. 118 * 119 * @param key the key to retrieve from the skin. 120 * @return the value of the property for the named skin (defaulting to the 121 * default skin), the webapp skin, the default skin or <code>null</code>, 122 * depending on whether or not the property or skins exist. 123 */ 124 public String get(String key) 125 { 126 return TurbineUI.get(getSkin(), key); 127 } 128 129 /** 130 * Retrieve the skin name. 131 */ 132 public String getSkin() 133 { 134 return skinName; 135 } 136 137 /** 138 * Set the skin name to the skin from the TurbineResources.properties file. 139 * If the property is not present use the "default" skin. 140 */ 141 public void setSkin() 142 { 143 skinName = TurbineUI.getWebappSkinName(); 144 } 145 146 /** 147 * Set the skin name to the specified skin. 148 * 149 * @param skinName the skin name to use. 150 */ 151 public void setSkin(String skinName) 152 { 153 this.skinName = skinName; 154 } 155 156 /** 157 * Set the skin name when the tool is configured to be loaded on a 158 * per-request basis. By default it calls getSkin to return the skin 159 * specified in TurbineResources.properties. Developers can write a subclass 160 * of UITool that overrides this method to determine the skin to use based 161 * on information held in the request. 162 * 163 * @param data a RunData instance 164 */ 165 protected void setSkin(RunData data) 166 { 167 setSkin(); 168 } 169 170 /** 171 * Set the skin name when the tool is configured to be loaded on a 172 * per-session basis. If the user's temp hashmap contains a value in the 173 * attribute specified by the String constant SKIN_ATTRIBUTE then that is 174 * returned. Otherwise it calls getSkin to return the skin specified in 175 * TurbineResources.properties. 176 * 177 * @param user a User instance 178 */ 179 protected void setSkin(User user) 180 { 181 if (user.getTemp(SKIN_ATTRIBUTE) == null) 182 { 183 setSkin(); 184 } 185 else 186 { 187 setSkin((String) user.getTemp(SKIN_ATTRIBUTE)); 188 } 189 } 190 191 /** 192 * Set the skin name in the user's temp hashmap for the current session. 193 * 194 * @param user a User instance 195 * @param skin the skin name for the session 196 */ 197 public static void setSkin(User user, String skin) 198 { 199 user.setTemp(SKIN_ATTRIBUTE, skin); 200 } 201 202 /** 203 * Retrieve the URL for an image that is part of the skin. The images are 204 * stored in the WEBAPP/resources/ui/skins/[SKIN]/images directory. 205 * 206 * <p>Use this if for some reason your server name, server scheme, or server 207 * port change on a per request basis. I'm not sure if this would happen in 208 * a load balanced situation. I think in most cases the image(String image) 209 * method would probably be enough, but I'm not absolutely positive. 210 * 211 * @param imageId the id of the image whose URL will be generated. 212 * @param data the RunDate to use as the source of the ServerData to use as 213 * the basis for the URL. 214 */ 215 public String image(String imageId, RunData data) 216 { 217 return image(imageId, data.getServerData()); 218 } 219 220 /** 221 * Retrieve the URL for an image that is part of the skin. The images are 222 * stored in the WEBAPP/resources/ui/skins/[SKIN]/images directory. 223 * 224 * <p>Use this if for some reason your server name, server scheme, or server 225 * port change on a per request basis. I'm not sure if this would happen in 226 * a load balanced situation. I think in most cases the image(String image) 227 * method would probably be enough, but I'm not absolutely positive. 228 * 229 * @param imageId the id of the image whose URL will be generated. 230 * @param serverData the serverData to use as the basis for the URL. 231 */ 232 public String image(String imageId, ServerData serverData) 233 { 234 return TurbineUI.image(getSkin(), imageId, serverData); 235 } 236 237 /** 238 * Retrieve the URL for an image that is part of the skin. The images are 239 * stored in the WEBAPP/resources/ui/skins/[SKIN]/images directory. 240 * 241 * @param imageId the id of the image whose URL will be generated. 242 */ 243 public String image(String imageId) 244 { 245 return TurbineUI.image(getSkin(), imageId); 246 } 247 248 /** 249 * Retrieve the URL for the style sheet that is part of the skin. The style 250 * is stored in the WEBAPP/resources/ui/skins/[SKIN] directory with the 251 * filename skin.css 252 * 253 * <p>Use this if for some reason your server name, server scheme, or server 254 * port change on a per request basis. I'm not sure if this would happen in 255 * a load balanced situation. I think in most cases the style() method would 256 * probably be enough, but I'm not absolutely positive. 257 * 258 * @param data the RunDate to use as the source of the ServerData to use as 259 * the basis for the URL. 260 */ 261 public String getStylecss(RunData data) 262 { 263 return getStylecss(data.getServerData()); 264 } 265 266 /** 267 * Retrieve the URL for the style sheet that is part of the skin. The style 268 * is stored in the WEBAPP/resources/ui/skins/[SKIN] directory with the 269 * filename skin.css 270 * 271 * <p>Use this if for some reason your server name, server scheme, or server 272 * port change on a per request basis. I'm not sure if this would happen in 273 * a load balanced situation. I think in most cases the style() method would 274 * probably be enough, but I'm not absolutely positive. 275 * 276 * @param serverData the serverData to use as the basis for the URL. 277 */ 278 public String getStylecss(ServerData serverData) 279 { 280 return TurbineUI.getStylecss(getSkin(), serverData); 281 } 282 283 /** 284 * Retrieve the URL for the style sheet that is part of the skin. The style 285 * is stored in the WEBAPP/resources/ui/skins/[SKIN] directory with the 286 * filename skin.css 287 */ 288 public String getStylecss() 289 { 290 return TurbineUI.getStylecss(getSkin()); 291 } 292 293 /** 294 * Retrieve the URL for a given script that is part of the skin. The script 295 * is stored in the WEBAPP/resources/ui/skins/[SKIN] directory. 296 * 297 * <p>Use this if for some reason your server name, server scheme, or server 298 * port change on a per request basis. I'm not sure if this would happen in 299 * a load balanced situation. I think in most cases the image(String image) 300 * method would probably be enough, but I'm not absolutely positive. 301 * 302 * @param filename the name of the script file whose URL will be generated. 303 * @param data the RunDate to use as the source of the ServerData to use as 304 * the basis for the URL. 305 */ 306 public String getScript(String filename, RunData data) 307 { 308 return getScript(filename, data.getServerData()); 309 } 310 311 /** 312 * Retrieve the URL for a given script that is part of the skin. The script 313 * is stored in the WEBAPP/resources/ui/skins/[SKIN] directory. 314 * 315 * <p>Use this if for some reason your server name, server scheme, or server 316 * port change on a per request basis. I'm not sure if this would happen in 317 * a load balanced situation. I think in most cases the image(String image) 318 * method would probably be enough, but I'm not absolutely positive. 319 * 320 * @param filename the name of the script file whose URL will be generated. 321 * @param serverData the serverData to use as the basis for the URL. 322 */ 323 public String getScript(String filename, ServerData serverData) 324 { 325 return TurbineUI.getScript(getSkin(), filename, serverData); 326 } 327 328 /** 329 * Retrieve the URL for a given script that is part of the skin. The script 330 * is stored in the WEBAPP/resources/ui/skins/[SKIN] directory. 331 * 332 * @param filename the name of the script file whose URL will be generated. 333 */ 334 public String getScript(String filename) 335 { 336 return TurbineUI.getScript(getSkin(), filename); 337 } 338 339 /** 340 * Initialize the UITool object. 341 * 342 * @param data This is null, RunData or User depending upon specified tool 343 * scope. 344 */ 345 public void init(Object data) 346 { 347 if (data == null) 348 { 349 log.debug("UITool scope is global"); 350 setSkin(); 351 } 352 else if (data instanceof RunData) 353 { 354 log.debug("UITool scope is request"); 355 setSkin((RunData) data); 356 } 357 else if (data instanceof PipelineData) 358 { 359 PipelineData pipelineData = (PipelineData) data; 360 RunData runData = (RunData)pipelineData; 361 log.debug("UITool scope is request"); 362 setSkin(runData); 363 } 364 else if (data instanceof User) 365 { 366 log.debug("UITool scope is session"); 367 setSkin((User) data); 368 } 369 } 370 371 }