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plugins/editors-xtd/readmore/readmore.php

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+<?php
+/**
+ * @package     Joomla.Plugin
+ * @subpackage  Editors-xtd.readmore
+ *
+ * @copyright   Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+defined('_JEXEC') or die;
+
+/**
+ * Editor Readmore buton
+ *
+ * @package     Joomla.Plugin
+ * @subpackage  Editors-xtd.readmore
+ * @since       1.5
+ */
+class PlgButtonReadmore extends JPlugin
+{
+	/**
+	 * Load the language file on instantiation.
+	 *
+	 * @var    boolean
+	 * @since  3.1
+	 */
+	protected $autoloadLanguage = true;
+
+	/**
+	 * Readmore button
+	 *
+	 * @param   string  $name  The name of the button to add
+	 *
+	 * @return array A two element array of (imageName, textToInsert)
+	 */
+	public function onDisplay($name)
+	{
+		$doc = JFactory::getDocument();
+
+		// Button is not active in specific content components
+
+		$getContent = $this->_subject->getContent($name);
+		$present = JText::_('PLG_READMORE_ALREADY_EXISTS', true);
+		$js = "
+			function insertReadmore(editor)
+			{
+				var content = $getContent
+				if (content.match(/<hr\s+id=(\"|')system-readmore(\"|')\s*\/*>/i))
+				{
+					alert('$present');
+					return false;
+				} else {
+					jInsertEditorText('<hr id=\"system-readmore\" />', editor);
+				}
+			}
+			";
+
+		$doc->addScriptDeclaration($js);
+
+		$button = new JObject;
+		$button->modal = false;
+		$button->class = 'btn';
+		$button->onclick = 'insertReadmore(\'' . $name . '\');return false;';
+		$button->text = JText::_('PLG_READMORE_BUTTON_READMORE');
+		$button->name = 'arrow-down';
+
+		// @TODO: The button writer needs to take into account the javascript directive
+		// $button->link', 'javascript:void(0)');
+		$button->link = '#';
+
+		return $button;
+	}
+}