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<?php
class TThemeManager extends TComponent implements IModule
{
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 $_application;
/**
* Initializes the module.
* This method is required by IModule and is invoked by application.
* @param IApplication application
* @param TXmlElement module configuration
*/
public function init($application,$config)
{
$this->_application=$application;
if($this->_themePath===null)
$this->_themePath=dirname($application->getConfigurationFile()).'/'.self::DEFAULT_THEME_PATH;
$this->_initialized=true;
}
/**
* @return string id of this module
*/
public function getID()
{
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
{
$themeFile=$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;
}
}
public function getThemePath()
{
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))
{
$theme=&$this->parse(file_get_contents($themeFile));
foreach($theme as $skin)
{
if($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];
}
}
else
throw new TIOException('theme_themefile_invalid',$themeFile);
}
public function applySkin($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)
{
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 false;
}
}
?>
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