From 9ca0e83cc39d67c240ea89a2395d3bdb170fb4f7 Mon Sep 17 00:00:00 2001
From: xue <>
Date: Tue, 17 Jul 2007 11:54:59 +0000
Subject: Added THead requirement check

---
 framework/Exceptions/messages.txt         |  1 +
 framework/Web/UI/TClientScriptManager.php | 10 ++++++++++
 framework/Web/UI/TPage.php                |  3 +++
 3 files changed, 14 insertions(+)

(limited to 'framework')

diff --git a/framework/Exceptions/messages.txt b/framework/Exceptions/messages.txt
index baddb754..c9607f00 100644
--- a/framework/Exceptions/messages.txt
+++ b/framework/Exceptions/messages.txt
@@ -193,6 +193,7 @@ page_isvalid_unknown					= TPage.IsValid has not been evaluated yet.
 page_postbackcontrol_invalid			= Unable to determine postback control '{0}'.
 page_control_outofform					= {0} '{1}' must be enclosed within TForm.
 page_head_duplicated					= A page can contain at most one THead.
+page_head_required						= A THead control is needed in page template in order to render CSS and js in the HTML head section.
 page_statepersister_invalid				= Page state persister must implement IPageStatePersister interface.
 
 csmanager_pradoscript_invalid			= Unknown Prado script library name '{0}'.
diff --git a/framework/Web/UI/TClientScriptManager.php b/framework/Web/UI/TClientScriptManager.php
index efb8ec17..5f924397 100644
--- a/framework/Web/UI/TClientScriptManager.php
+++ b/framework/Web/UI/TClientScriptManager.php
@@ -86,6 +86,16 @@ class TClientScriptManager extends TApplicationComponent
 		$this->_page=$owner;
 	}
 
+	/**
+	 * @return boolean whether THead is required in order to render CSS and js within head
+	 * @since 3.1.1
+	 */
+	public function getRequiresHead()
+	{
+		return count($this->_styleSheetFiles) || count($this->_styleSheets)
+			|| count($this->_headScriptFiles) || count($this->_headScripts);
+	}
+
 	/**
 	 * Registers Prado javascript by library name. See "Web/Javascripts/source/packages.php"
 	 * for library names.
diff --git a/framework/Web/UI/TPage.php b/framework/Web/UI/TPage.php
index 1a9f45c6..f368bc60 100644
--- a/framework/Web/UI/TPage.php
+++ b/framework/Web/UI/TPage.php
@@ -659,6 +659,9 @@ class TPage extends TTemplateControl
 			foreach($this->_styleSheet->getJavaScriptFiles() as $url)
 				$cs->registerHeadScriptFile($url,$url);
 		}
+
+		if($cs->getRequiresHead() && $this->getHead()===null)
+			throw new TConfigurationException('page_head_required');
 	}
 
 	/**
-- 
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