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+<?php
+/**
+ * TThemeManager class
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link https://github.com/pradosoft/prado
+ * @copyright Copyright &copy; 2005-2015 The PRADO Group
+ * @license https://github.com/pradosoft/prado/blob/master/COPYRIGHT
+ * @package System.Web.UI
+ */
+
+Prado::using('System.Web.Services.TPageService');
+
+/**
+ * TThemeManager class
+ *
+ * TThemeManager manages the themes used in a Prado application.
+ *
+ * Themes are stored under the directory specified by the
+ * {@link setBasePath BasePath} property. The themes can be accessed
+ * via URL {@link setBaseUrl BaseUrl}. Each theme is represented by a subdirectory
+ * and all the files under that directory. The name of a theme is the name
+ * of the corresponding subdirectory.
+ * By default, the base path of all themes is a directory named "themes"
+ * under the directory containing the application entry script.
+ * To get a theme (normally you do not need to), call {@link getTheme}.
+ *
+ * TThemeManager may be configured within page service tag in application
+ * configuration file as follows,
+ * <module id="themes" class="System.Web.UI.TThemeManager"
+ * BasePath="Application.themes" BaseUrl="/themes" />
+ * where {@link getCacheExpire CacheExpire}, {@link getCacheControl CacheControl}
+ * and {@link getBufferOutput BufferOutput} are configurable properties of THttpResponse.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @package System.Web.UI
+ * @since 3.0
+ */
+class TThemeManager extends TModule
+{
+ /**
+ * default themes base path
+ */
+ const DEFAULT_BASEPATH='themes';
+
+ /**
+ * default theme class
+ */
+ const DEFAULT_THEMECLASS = 'TTheme';
+
+ /**
+ * @var string
+ */
+ private $_themeClass=self::DEFAULT_THEMECLASS;
+
+ /**
+ * @var boolean whether this module has been initialized
+ */
+ private $_initialized=false;
+ /**
+ * @var string the directory containing all themes
+ */
+ private $_basePath=null;
+ /**
+ * @var string the base URL for all themes
+ */
+ private $_baseUrl=null;
+
+ /**
+ * Initializes the module.
+ * This method is required by IModule and is invoked by application.
+ * @param TXmlElement module configuration
+ */
+ public function init($config)
+ {
+ $this->_initialized=true;
+ $service=$this->getService();
+ if($service instanceof TPageService)
+ $service->setThemeManager($this);
+ else
+ throw new TConfigurationException('thememanager_service_unavailable');
+ }
+
+ /**
+ * @param string name of the theme to be retrieved
+ * @return TTheme the theme retrieved
+ */
+ public function getTheme($name)
+ {
+ $themePath=$this->getBasePath().DIRECTORY_SEPARATOR.$name;
+ $themeUrl=rtrim($this->getBaseUrl(),'/').'/'.$name;
+ return Prado::createComponent($this->getThemeClass(), $themePath, $themeUrl);
+ }
+
+ /**
+ * @param string|null $class Theme class name in namespace format
+ */
+ public function setThemeClass($class) {
+ $this->_themeClass = $class===null ? self::DEFAULT_THEMECLASS : (string)$class;
+ }
+
+ /**
+ * @return string Theme class name in namespace format. Defaults to {@link TThemeManager::DEFAULT_THEMECLASS DEFAULT_THEMECLASS}.
+ */
+ public function getThemeClass() {
+ return $this->_themeClass;
+ }
+
+ /**
+ * @return array list of available theme names
+ */
+ public function getAvailableThemes()
+ {
+ $themes=array();
+ $basePath=$this->getBasePath();
+ $folder=@opendir($basePath);
+ while($file=@readdir($folder))
+ {
+ if($file!=='.' && $file!=='..' && $file!=='.svn' && is_dir($basePath.DIRECTORY_SEPARATOR.$file))
+ $themes[]=$file;
+ }
+ closedir($folder);
+ return $themes;
+ }
+
+ /**
+ * @return string the base path for all themes. It is returned as an absolute path.
+ * @throws TConfigurationException if base path is not set and "themes" directory does not exist.
+ */
+ public function getBasePath()
+ {
+ if($this->_basePath===null)
+ {
+ $this->_basePath=dirname($this->getRequest()->getApplicationFilePath()).DIRECTORY_SEPARATOR.self::DEFAULT_BASEPATH;
+ if(($basePath=realpath($this->_basePath))===false || !is_dir($basePath))
+ throw new TConfigurationException('thememanager_basepath_invalid2',$this->_basePath);
+ $this->_basePath=$basePath;
+ }
+ return $this->_basePath;
+ }
+
+ /**
+ * @param string the base path for all themes. It must be in the format of a namespace.
+ * @throws TInvalidDataValueException if the base path is not a proper namespace.
+ */
+ public function setBasePath($value)
+ {
+ if($this->_initialized)
+ throw new TInvalidOperationException('thememanager_basepath_unchangeable');
+ else
+ {
+ $this->_basePath=Prado::getPathOfNamespace($value);
+ if($this->_basePath===null || !is_dir($this->_basePath))
+ throw new TInvalidDataValueException('thememanager_basepath_invalid',$value);
+ }
+ }
+
+ /**
+ * @return string the base URL for all themes.
+ * @throws TConfigurationException If base URL is not set and a correct one cannot be determined by Prado.
+ */
+ public function getBaseUrl()
+ {
+ if($this->_baseUrl===null)
+ {
+ $appPath=dirname($this->getRequest()->getApplicationFilePath());
+ $basePath=$this->getBasePath();
+ if(strpos($basePath,$appPath)===false)
+ throw new TConfigurationException('thememanager_baseurl_required');
+ $appUrl=rtrim(dirname($this->getRequest()->getApplicationUrl()),'/\\');
+ $this->_baseUrl=$appUrl.strtr(substr($basePath,strlen($appPath)),'\\','/');
+ }
+ return $this->_baseUrl;
+ }
+
+ /**
+ * @param string the base URL for all themes.
+ */
+ public function setBaseUrl($value)
+ {
+ $this->_baseUrl=rtrim($value,'/');
+ }
+}
+
+/**
+ * TTheme class
+ *
+ * TTheme represents a particular theme. It is merely a collection of skins
+ * that are applicable to the corresponding controls.
+ *
+ * Each theme is stored as a directory and files under that directory.
+ * The theme name is the directory name. When TTheme is created, the files
+ * whose name has the extension ".skin" are parsed and saved as controls skins.
+ *
+ * A skin is essentially a list of initial property values that are to be applied
+ * to a control when the skin is applied.
+ * Each type of control can have multiple skins identified by the SkinID.
+ * If a skin does not have SkinID, it is the default skin that will be applied
+ * to controls that do not specify particular SkinID.
+ *
+ * Whenever possible, TTheme will try to make use of available cache to save
+ * the parsing time.
+ *
+ * To apply a theme to a particular control, call {@link applySkin}.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @package System.Web.UI
+ * @since 3.0
+ */
+class TTheme extends TApplicationComponent implements ITheme
+{
+ /**
+ * prefix for cache variable name used to store parsed themes
+ */
+ const THEME_CACHE_PREFIX='prado:theme:';
+ /**
+ * Extension name of skin files
+ */
+ const SKIN_FILE_EXT='.skin';
+ /**
+ * @var string theme path
+ */
+ private $_themePath;
+ /**
+ * @var string theme url
+ */
+ private $_themeUrl;
+ /**
+ * @var array list of skins for the theme
+ */
+ private $_skins=null;
+ /**
+ * @var string theme name
+ */
+ private $_name='';
+ /**
+ * @var array list of css files
+ */
+ private $_cssFiles=array();
+ /**
+ * @var array list of js files
+ */
+ private $_jsFiles=array();
+
+ /**
+ * Constructor.
+ * @param string theme path
+ * @param string theme URL
+ * @throws TConfigurationException if theme path does not exist or any parsing error of the skin files
+ */
+ public function __construct($themePath,$themeUrl)
+ {
+ $this->_themeUrl=$themeUrl;
+ $this->_themePath=realpath($themePath);
+ $this->_name=basename($themePath);
+ $cacheValid=false;
+ // TODO: the following needs to be cleaned up (Qiang)
+ if(($cache=$this->getApplication()->getCache())!==null)
+ {
+ $array=$cache->get(self::THEME_CACHE_PREFIX.$themePath);
+ if(is_array($array))
+ {
+ list($skins,$cssFiles,$jsFiles,$timestamp)=$array;
+ if($this->getApplication()->getMode()!==TApplicationMode::Performance)
+ {
+ if(($dir=opendir($themePath))===false)
+ throw new TIOException('theme_path_inexistent',$themePath);
+ $cacheValid=true;
+ while(($file=readdir($dir))!==false)
+ {
+ if($file==='.' || $file==='..')
+ continue;
+ else if(basename($file,'.css')!==$file)
+ $this->_cssFiles[]=$themeUrl.'/'.$file;
+ else if(basename($file,'.js')!==$file)
+ $this->_jsFiles[]=$themeUrl.'/'.$file;
+ else if(basename($file,self::SKIN_FILE_EXT)!==$file && filemtime($themePath.DIRECTORY_SEPARATOR.$file)>$timestamp)
+ {
+ $cacheValid=false;
+ break;
+ }
+ }
+ closedir($dir);
+ if($cacheValid)
+ $this->_skins=$skins;
+ }
+ else
+ {
+ $cacheValid=true;
+ $this->_cssFiles=$cssFiles;
+ $this->_jsFiles=$jsFiles;
+ $this->_skins=$skins;
+ }
+ }
+ }
+ if(!$cacheValid)
+ {
+ $this->_cssFiles=array();
+ $this->_jsFiles=array();
+ $this->_skins=array();
+ if(($dir=opendir($themePath))===false)
+ throw new TIOException('theme_path_inexistent',$themePath);
+ while(($file=readdir($dir))!==false)
+ {
+ if($file==='.' || $file==='..')
+ continue;
+ else if(basename($file,'.css')!==$file)
+ $this->_cssFiles[]=$themeUrl.'/'.$file;
+ else if(basename($file,'.js')!==$file)
+ $this->_jsFiles[]=$themeUrl.'/'.$file;
+ else if(basename($file,self::SKIN_FILE_EXT)!==$file)
+ {
+ $template=new TTemplate(file_get_contents($themePath.'/'.$file),$themePath,$themePath.'/'.$file);
+ foreach($template->getItems() as $skin)
+ {
+ if(!isset($skin[2])) // a text string, ignored
+ continue;
+ else if($skin[0]!==-1)
+ throw new TConfigurationException('theme_control_nested',$skin[1],dirname($themePath));
+ $type=$skin[1];
+ $id=isset($skin[2]['skinid'])?$skin[2]['skinid']:0;
+ unset($skin[2]['skinid']);
+ if(isset($this->_skins[$type][$id]))
+ throw new TConfigurationException('theme_skinid_duplicated',$type,$id,dirname($themePath));
+ /*
+ foreach($skin[2] as $name=>$value)
+ {
+ if(is_array($value) && ($value[0]===TTemplate::CONFIG_DATABIND || $value[0]===TTemplate::CONFIG_PARAMETER))
+ throw new TConfigurationException('theme_databind_forbidden',dirname($themePath),$type,$id);
+ }
+ */
+ $this->_skins[$type][$id]=$skin[2];
+ }
+ }
+ }
+ closedir($dir);
+ sort($this->_cssFiles);
+ sort($this->_jsFiles);
+ if($cache!==null)
+ $cache->set(self::THEME_CACHE_PREFIX.$themePath,array($this->_skins,$this->_cssFiles,$this->_jsFiles,time()));
+ }
+ }
+
+ /**
+ * @return string theme name
+ */
+ public function getName()
+ {
+ return $this->_name;
+ }
+
+ /**
+ * @param string theme name
+ */
+ protected function setName($value)
+ {
+ $this->_name = $value;
+ }
+
+ /**
+ * @return string the URL to the theme folder (without ending slash)
+ */
+ public function getBaseUrl()
+ {
+ return $this->_themeUrl;
+ }
+
+ /**
+ * @param string the URL to the theme folder
+ */
+ protected function setBaseUrl($value)
+ {
+ $this->_themeUrl=rtrim($value,'/');
+ }
+
+ /**
+ * @return string the file path to the theme folder
+ */
+ public function getBasePath()
+ {
+ return $this->_themePath;
+ }
+
+ /**
+ * @param string tthe file path to the theme folder
+ */
+ protected function setBasePath($value)
+ {
+ $this->_themePath=$value;
+ }
+
+ /**
+ * @return array list of skins for the theme
+ */
+ public function getSkins()
+ {
+ return $this->_skins;
+ }
+
+ /**
+ * @param array list of skins for the theme
+ */
+ protected function setSkins($value)
+ {
+ $this->_skins = $value;
+ }
+
+ /**
+ * Applies the theme to a particular control.
+ * The control's class name and SkinID value will be used to
+ * identify which skin to be applied. If the control's SkinID is empty,
+ * the default skin will be applied.
+ * @param TControl the control to be applied with a skin
+ * @return boolean if a skin is successfully applied
+ * @throws TConfigurationException if any error happened during the skin application
+ */
+ public function applySkin($control)
+ {
+ $type=get_class($control);
+ if(($id=$control->getSkinID())==='')
+ $id=0;
+ if(isset($this->_skins[$type][$id]))
+ {
+ foreach($this->_skins[$type][$id] as $name=>$value)
+ {
+ Prado::trace("Applying skin $name to $type",'System.Web.UI.TThemeManager');
+ if(is_array($value))
+ {
+ switch($value[0])
+ {
+ case TTemplate::CONFIG_EXPRESSION:
+ $value=$this->evaluateExpression($value[1]);
+ break;
+ case TTemplate::CONFIG_ASSET:
+ $value=$this->_themeUrl.'/'.ltrim($value[1],'/');
+ break;
+ case TTemplate::CONFIG_DATABIND:
+ $control->bindProperty($name,$value[1]);
+ break;
+ case TTemplate::CONFIG_PARAMETER:
+ $control->setSubProperty($name,$this->getApplication()->getParameters()->itemAt($value[1]));
+ break;
+ case TTemplate::CONFIG_TEMPLATE:
+ $control->setSubProperty($name,$value[1]);
+ break;
+ case TTemplate::CONFIG_LOCALIZATION:
+ $control->setSubProperty($name,Prado::localize($value[1]));
+ break;
+ default:
+ throw new TConfigurationException('theme_tag_unexpected',$name,$value[0]);
+ break;
+ }
+ }
+ if(!is_array($value))
+ {
+ if(strpos($name,'.')===false) // is simple property or custom attribute
+ {
+ if($control->hasProperty($name))
+ {
+ if($control->canSetProperty($name))
+ {
+ $setter='set'.$name;
+ $control->$setter($value);
+ }
+ else
+ throw new TConfigurationException('theme_property_readonly',$type,$name);
+ }
+ else
+ throw new TConfigurationException('theme_property_undefined',$type,$name);
+ }
+ else // complex property
+ $control->setSubProperty($name,$value);
+ }
+ }
+ return true;
+ }
+ else
+ return false;
+ }
+
+ /**
+ * @return array list of CSS files (URL) in the theme
+ */
+ public function getStyleSheetFiles()
+ {
+ return $this->_cssFiles;
+ }
+
+ /**
+ * @param array list of CSS files (URL) in the theme
+ */
+ protected function setStyleSheetFiles($value)
+ {
+ $this->_cssFiles=$value;
+ }
+
+ /**
+ * @return array list of Javascript files (URL) in the theme
+ */
+ public function getJavaScriptFiles()
+ {
+ return $this->_jsFiles;
+ }
+
+ /**
+ * @param array list of Javascript files (URL) in the theme
+ */
+ protected function setJavaScriptFiles($value)
+ {
+ $this->_jsFiles=$value;
+ }
+}
+
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