From ccf0cd0f8d6480238db531f46ae1c70554d0e90d Mon Sep 17 00:00:00 2001
From: xue <>
Date: Sat, 8 Apr 2006 17:00:05 +0000
Subject: Added TOutputCache.

---
 framework/Web/UI/WebControls/TOutputCache.php | 160 ++++++++++++++++++++++++++
 1 file changed, 160 insertions(+)
 create mode 100644 framework/Web/UI/WebControls/TOutputCache.php

(limited to 'framework/Web/UI/WebControls/TOutputCache.php')

diff --git a/framework/Web/UI/WebControls/TOutputCache.php b/framework/Web/UI/WebControls/TOutputCache.php
new file mode 100644
index 00000000..9708c033
--- /dev/null
+++ b/framework/Web/UI/WebControls/TOutputCache.php
@@ -0,0 +1,160 @@
+<?php
+
+class TOutputCache extends TControl implements INamingContainer
+{
+	const CACHE_ID_PREFIX='prado:outputcache';
+	private $_useCache=false;
+	private $_cacheReady=false;
+	private $_cacheChecked=false;
+	private $_expiry=60;
+	private $_cache=null;
+	private $_contents;
+	private $_state;
+	private $_enableCaching=true;
+	private $_actions=array();
+
+	protected function initRecursive($namingContainer=null)
+	{
+		if($this->_cacheReady && !$this->_useCache)
+		{
+			$stack=$this->getPage()->getCachingStack();
+			$stack->push($this);
+			parent::initRecursive($namingContainer);
+			$stack->pop();
+		}
+		else
+			parent::initRecursive($namingContainer);
+	}
+
+	protected function loadRecursive()
+	{
+		if($this->_cacheReady && !$this->_useCache)
+		{
+			$stack=$this->getPage()->getCachingStack();
+			$stack->push($this);
+			parent::loadRecursive();
+			$stack->pop();
+		}
+		else
+		{
+			if($this->_useCache)
+			{
+				$cs=$this->getPage()->getClientScript();
+				foreach($this->_actions as $action)
+				{
+					if($action[0]==='registerRequiresPostData')
+						$this->getPage()->registerRequiresPostData($action[1]);
+					else
+						call_user_func_array(array($cs,$action[0]),$action[1]);
+				}
+			}
+			parent::loadRecursive();
+		}
+	}
+
+	protected function preRenderRecursive()
+	{
+		if($this->_cacheReady && !$this->_useCache)
+		{
+			$stack=$this->getPage()->getCachingStack();
+			$stack->push($this);
+			parent::preRenderRecursive();
+			$stack->pop();
+		}
+		else
+			parent::preRenderRecursive();
+	}
+
+	public function registerAction($funcName,$funcParams)
+	{
+		$this->_actions[]=array($funcName,$funcParams);
+	}
+
+	public function getAllowChildControls()
+	{
+		if(!$this->_cacheChecked)
+		{
+			$this->_cacheChecked=true;
+			if(!$this->getPage()->getIsPostBack() && ($this->_cache=$this->getApplication()->getCache())!==null && $this->getEnableCaching())
+			{
+				$this->_cacheReady=true;
+				$data=$this->_cache->get($this->getCacheKey());
+				if(($this->_useCache=($data!==false)))
+					list($this->_contents,$this->_state,$this->_actions)=$data;
+			}
+		}
+		return !$this->_useCache;
+	}
+
+	public function getEnableCaching()
+	{
+		return $this->_enableCaching;
+	}
+
+	public function setEnableCaching($value)
+	{
+		$this->_enableCaching=TPropertyValue::ensureBoolean($value);
+	}
+
+	protected function loadStateRecursive(&$state,$needViewState=true)
+	{
+		if($this->_useCache)
+			parent::loadStateRecursive($this->_state,$needViewState);
+		else
+			parent::loadStateRecursive($state,$needViewState);
+	}
+
+	protected function &saveStateRecursive($needViewState=true)
+	{
+		if($this->_useCache)
+			return $this->_state;
+		else if($this->_cacheReady)
+		{
+			$this->_state=parent::saveStateRecursive($needViewState);
+			return $this->_state;
+		}
+		else
+			return parent::saveStateRecursive($needViewState);
+	}
+
+	protected function getCacheKey()
+	{
+		return self::CACHE_ID_PREFIX.$this->getUniqueID();
+	}
+
+	public function getExpiry()
+	{
+		return $this->_expiry;
+	}
+
+	public function setExpiry($value)
+	{
+		if(($value=TPropertyValue::ensureInteger($value))<0)
+			throw new TInvalidDataValueException('outputcache_expiry_invalid');
+		$this->_expiry=$value;
+	}
+
+	public function render($writer)
+	{
+		if($this->_useCache)
+			$writer->write($this->_contents);
+		else if($this->_cacheReady)
+		{
+			$textWriter=new TTextWriter;
+
+			$stack=$this->getPage()->getCachingStack();
+			$stack->push($this);
+			parent::render(new THtmlWriter($textWriter));
+			$stack->pop();
+
+			$content=$textWriter->flush();
+			$data=array($content,$this->_state,$this->_actions);
+			$this->_cache->set($this->getCacheKey(),$data,$this->getExpiry());
+			$writer->write($content);
+		}
+		else
+			parent::render($writer);
+	}
+}
+
+?>
\ No newline at end of file
-- 
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