Revised the view helper calls and optimized them. Added option to move JS to the page footer.

Classes/ViewHelpers/AddCssJsViewHelper.php

+<?php
+
+/***************************************************************
+ *  Copyright notice
+ *
+ *  (c) 2012 Andy Hausmann <hi@andy-hausmann.de>
+ *
+ *  All rights reserved
+ *
+ *  This script is part of the TYPO3 project. The TYPO3 project is
+ *  free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  The GNU General Public License can be found at
+ *  http://www.gnu.org/copyleft/gpl.html.
+ *
+ *  This script is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  This copyright notice MUST APPEAR in all copies of the script!
+ ***************************************************************/
+
+/**
+ *
+ * A view helper for adding CSS and JS files to teh frontend.
+ *
+ * This helper needs to be called once per file.
+ * It is not possible to add multiple files via array or such, yet.
+ *
+ * = Examples =
+ *
+ * <code title="Single argument">
+ * <fs:AddCssJs file="path/to/file.ext" />
+ * </code>
+ * <output>
+ * </output>
+ *
+ * @package flexslider
+ * @license http://www.gnu.org/licenses/gpl.html GNU General Public License, version 3 or later
+ */
+class Tx_Flexslider_ViewHelpers_AddCssJsViewHelper extends Tx_Fluid_Core_ViewHelper_AbstractTagBasedViewHelper {
+
+	/**
+	 * Adds JS and CSS to the frontend
+	 *
+	 * @param string $file
+	 * @param bool $moveToFooter
+	 * @return void Flag to include file into footer - doesn't work for CSS files
+	 */
+
+	public function render($file = NULL, $moveToFooter = FALSE)
+	{
+		if ($file) {
+			// Get file extension (after last occurance of a dot)
+			$mediaTypeSplit = strrchr($file, '.');
+
+			Tx_Flexslider_Utility_Div::addCssJsFile(
+				$file,
+				($mediaTypeSplit == '.js') ? 'flexSliderJs' : 'flexSliderCss',
+				$moveToFooter
+			);
+		}
+	}
+}
+?>
\ No newline at end of file

Classes/ViewHelpers/AddFileViewHelper.php

-<?php
-
-class Tx_Flexslider_ViewHelpers_AddFileViewHelper extends Tx_Fluid_Core_ViewHelper_AbstractTagBasedViewHelper {
-
-	/**
-	 * Adds JS
-	 *
-	 * @param string $file
-	 * @return void
-	 */
-
-	public function render($file = NULL) {
-
-		$mediaTypeSplit = strrchr($file, '.');
-		$fileRef = $GLOBALS['TSFE']->tmpl->getFileName($file);
-
-		if ($fileRef) {
-			if ($mediaTypeSplit == '.js') {
-				$GLOBALS['TSFE']->additionalHeaderData['flexSliderJs'] = '<script src="' . $fileRef . '" type="text/javascript"></script>';
-			}
-			elseif ($mediaTypeSplit == '.css') {
-				$GLOBALS['TSFE']->additionalHeaderData['flexSliderCss'] =
-					'<link rel="stylesheet" type="text/css" media="all" href="' . $fileRef . '" />';
-			}
-		}
-	}
-}
-?>
\ No newline at end of file

Classes/ViewHelpers/AddJQueryViewHelper.php

 <?php
 
-class Tx_Flexslider_ViewHelpers_AddJQueryViewHelper extends Tx_Fluid_Core_ViewHelper_AbstractTagBasedViewHelper {
+/***************************************************************
+ *  Copyright notice
+ *
+ *  (c) 2012 Andy Hausmann <hi@andy-hausmann.de>
+ *
+ *  All rights reserved
+ *
+ *  This script is part of the TYPO3 project. The TYPO3 project is
+ *  free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  The GNU General Public License can be found at
+ *  http://www.gnu.org/copyleft/gpl.html.
+ *
+ *  This script is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  This copyright notice MUST APPEAR in all copies of the script!
+ ***************************************************************/
+
+/**
+ *
+ * A view helper for adding jQuery to the frontend.
+ *
+ * = Examples =
+ *
+ * <code title="Single argument">
+ * <fs:AddJQuery altJQueryFile="path/to/alternativeJQueryFile.js" />
+ * </code>
+ * <output>
+ * </output>
+ *
+ * @package flexslider
+ * @license http://www.gnu.org/licenses/gpl.html GNU General Public License, version 3 or later
+ */
+class Tx_Flexslider_ViewHelpers_AddJQueryViewHelper extends Tx_Fluid_Core_ViewHelper_AbstractTagBasedViewHelper
+{
 
 	/**
 	 * Adds T3Jquery as Lib
@@ -11,7 +51,6 @@ class Tx_Flexslider_ViewHelpers_AddJQueryViewHelper extends Tx_Fluid_Core_ViewHe
 	 * @param string $altJQueryFile
 	 * @return void
 	 */
-
 	public function render($altJQueryFile = NULL) {
 		// checks if t3jquery is loaded
 		if (t3lib_extMgm::isLoaded('t3jquery')) {
@@ -23,9 +62,16 @@ class Tx_Flexslider_ViewHelpers_AddJQueryViewHelper extends Tx_Fluid_Core_ViewHe
 
 		} else {
 			if ($altJQueryFile) {
-				$fileRef = $GLOBALS['TSFE']->tmpl->getFileName($altJQueryFile);
-				$GLOBALS['TSFE']->additionalHeaderData['flexSliderJQuery'] =
-					'<script src="' . $fileRef . '" type="text/javascript"></script>';
+				Tx_Flexslider_Utility_Div::addCssJsFile(
+					$altJQueryFile,
+					'flexSliderJQuery'
+				);
+			} else {
+				Tx_Flexslider_Utility_Div::renderFlashMessage(
+					'jQuery not loaded',
+					'jQuery could not be loaded. Please check the path to the alternative jQuery library or simply use the Extension t3jquery.',
+					t3lib_FlashMessage::ERROR
+				);
 			}
 		}
 	}

Configuration/TypoScript/constants.txt

@@ -19,6 +19,8 @@ plugin.tx_flexslider {
  			jQuery = EXT:flexslider/Resources/Public/Js/jquery-min.js
  			# String: File reference to flexslider library
  			flexslider = EXT:flexslider/Resources/Public/Js/jquery.flexslider-min.js
+ 			# Bool: Flag to define whether the script shoul be moved to the footer or not
+ 			moveToFooter = 0
  		}
 	}
 }
\ No newline at end of file

Configuration/TypoScript/setup.txt

@@ -12,6 +12,7 @@ plugin.tx_flexslider {
  		lib {
  			jQuery = {$plugin.tx_flexslider.settings.lib.jQuery}
  			flexslider = {$plugin.tx_flexslider.settings.lib.flexslider}
+ 			moveToFooter = {$plugin.tx_flexslider.settings.lib.moveToFooter}
  		}
 		# String: Select your animation type, "fade" or "slide"
 		animation = fade

Resources/Private/Templates/FlexSlider/List.html

@@ -7,8 +7,8 @@
 <f:flashMessages />
 
 <fs:AddJQuery altJQueryFile="{settings.lib.jQuery}" />
-<fs:AddFile file="{settings.lib.flexslider}" />
-<fs:AddFile file="{settings.css}" />
+<fs:AddCssJs file="{settings.lib.flexslider}" moveToFooter="{settings.lib.moveToFooter}" />
+<fs:AddCssJs file="{settings.css}" />
 
 <script type="text/javascript">
 <![CDATA[