From 99b820a5bf36158405208f140cf48f8aedf91fff Mon Sep 17 00:00:00 2001
From: xue <>
Date: Mon, 14 Nov 2005 00:29:41 +0000
Subject: Added theme support.

---
 framework/Web/UI/TTheme.php | 160 ++++++++++++++++++++++++++++++++++++--------
 1 file changed, 132 insertions(+), 28 deletions(-)

(limited to 'framework/Web/UI/TTheme.php')

diff --git a/framework/Web/UI/TTheme.php b/framework/Web/UI/TTheme.php
index 3d4d4e5d..452c473c 100644
--- a/framework/Web/UI/TTheme.php
+++ b/framework/Web/UI/TTheme.php
@@ -1,46 +1,129 @@
 <?php
 
-class TTheme extends TComponent
+class TThemeManager extends TComponent implements IModule
 {
-	private $_themePath;
-	private $_skins=array();
+	const THEME_CACHE_PREFIX='prado:theme:';
+	const DEFAULT_THEME_PATH='themes';
+	const THEME_FILE='theme.tpl';
+	/**
+	 * @var string module ID
+	 */
+	private $_id;
+	/**
+	 * @var boolean whether this module has been initialized
+	 */
+	private $_initialized=false;
+	/**
+	 * @var string the directory containing all themes
+	 */
+	private $_themePath=null;
+	/**
+	 * @var IApplication application
+	 */
+	private $_application;
 
-	public function __construct($name)
+	/**
+	 * Initializes the module.
+	 * This method is required by IModule and is invoked by application.
+	 * @param IApplication application
+	 * @param TXmlElement module configuration
+	 */
+	public function init($application,$config)
 	{
-		$this->_themePath=$name;
-		$this->initialize();
+		$this->_application=$application;
+		if($this->_themePath===null)
+			$this->_themePath=dirname($application->getConfigurationFile()).'/'.self::DEFAULT_THEME_PATH;
+
+		$this->_initialized=true;
 	}
 
-	private function initialize()
+	/**
+	 * @return string id of this module
+	 */
+	public function getID()
 	{
-		if(($theme=opendir($this->_themePath))===false)
-			throw new Exception("Invalid theme ".$this->_themePath);
-		while(($file=readdir($theme))!==false)
+		return $this->_id;
+	}
+
+	/**
+	 * @param string id of this module
+	 */
+	public function setID($value)
+	{
+		$this->_id=$value;
+	}
+
+	public function getTheme($name)
+	{
+		$themePath=realpath($this->_themePath.'/'.$name);
+		if($themePath===false || !is_dir($this->_themePath))
+			throw new TConfigurationException('thememanager_themepath_invalid',$themePath);
+		if(($cache=$this->_application->getCache())===null)
+			return new TTheme($themePath.'/'.self::THEME_FILE);
+		else
 		{
-			if(basename($file,'.skin')!==$file)
-				$this->parseSkinFile($this->_themePath.'/'.$file);
+			$themeFile=$themePath.'/'.self::THEME_FILE;
+			$array=$cache->get(self::THEME_CACHE_PREFIX.$themePath);
+			if(is_array($array))
+			{
+				list($theme,$timestamp)=$array;
+				if(filemtime($themeFile)<$timestamp)
+					return $theme;
+			}
+			$theme=new TTheme($themeFile);
+			$cache->set(self::THEME_CACHE_PREFIX.$themePath,array($theme,time()));
+			return $theme;
 		}
-		closedir($theme);
 	}
 
-	private function parseSkinFile($fileName)
+	public function getThemePath()
 	{
-		if(($skin=simplexml_load_file($fileName))===false)
-			throw new Exception("Parsing $fileName failed.");
-		foreach($skin->children() as $type=>$control)
+		return $this->_themePath;
+	}
+
+	public function setThemePath($value)
+	{
+		if($this->_initialized)
+			throw new TInvalidOperationException('thememanager_themepath_unchangeable');
+		else
+			$this->_themePath=$value;
+	}
+}
+
+class TTheme extends TTemplate
+{
+	private $_themePath;
+	private $_themeFile;
+	private $_skins=array();
+
+	public function __construct($themeFile)
+	{
+		$this->_themeFile=$themeFile;
+		$this->_themePath=dirname($themeFile);
+		if(is_file($themeFile) && is_readable($themeFile))
 		{
-			$attributes=array();
-			foreach($control->attributes() as $name=>$value)
+			$theme=&$this->parse(file_get_contents($themeFile));
+			foreach($theme as $skin)
 			{
-				$attributes[strtolower($name)]=(string)$value;
+				if($skin[0]!==0)
+					throw new TConfigurationException('theme_control_nested',$skin[1]);
+				else if(!isset($skin[2]))  // a text string, ignored
+					continue;
+				$type=$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,$id);
+				foreach($skin[2] as $name=>$value)
+				{
+					if(is_array($value) && $value[0]===0)
+						throw new TConfigurationException('theme_databind_unsupported',$type,$id,$name);
+				}
+				$this->_skins[$type][$id]=$skin[2];
 			}
-			$skinID=isset($attributes['skinid'])?(string)$attributes['skinid']:0;
-			unset($attributes['skinid']);
-			if(isset($this->_skins[$type][$skinID]))
-				throw new Exception("Duplicated skin $type.$skinID");
-			else
-				$this->_skins[$type][$skinID]=$attributes;
 		}
+		else
+			throw new TIOException('theme_themefile_invalid',$themeFile);
 	}
 
 	public function applySkin($control)
@@ -52,11 +135,32 @@ class TTheme extends TComponent
 		{
 			foreach($this->_skins[$type][$id] as $name=>$value)
 			{
-				$control->setSubProperty($name,$value);
+				if(is_array($value))
+					$value=$this->evaluateExpression($value);
+				if(strpos($name,'.')===false)	// is simple property or custom attribute
+				{
+					if($control->hasProperty($name))
+					{
+						if($control->canSetProperty($name))
+						{
+							$setter='set'.$name;
+							$control->$setter($value);
+						}
+						else
+							throw new TConfigurationException('theme_property_readonly',get_class($control),$name);
+					}
+					else if($control->getAllowCustomAttributes())
+						$control->getAttributes()->add($name,$value);
+					else
+						throw new TConfigurationException('theme_property_undefined',get_class($control),$name);
+				}
+				else	// complex property
+					$control->setSubProperty($name,$value);
 			}
+			return true;
 		}
 		else
-			return;
+			return false;
 	}
 }
 
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