added tabs

framework/yii/bootstrap/Tabs.php

+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\bootstrap;
+
+use yii\base\InvalidConfigException;
+use yii\helpers\base\ArrayHelper;
+use yii\helpers\Html;
+
+/**
+ * Tabs renders a Tab bootstrap javascript component.
+ *
+ * For example:
+ *
+ * ```php
+ * echo Tabs::widget(array(
+ *     'options' => array('class'=>'nav-tabs'),
+ *     'items' => array(
+ *         array(
+ *             'header' => 'One',
+ *             'content' => 'Anim pariatur cliche...',
+ *         ),
+ *         array(
+ *             'header' => 'Two',
+ *             'headerOptions' => array(...),
+ *             'content' => 'Anim pariatur cliche...',
+ *             'options' => array('id'=>'myveryownID'),
+ *         ),
+ *         array(
+ *             'header' => 'Dropdown',
+ *             'items' => array(
+ *                  array(
+ *                      'header' => '@Dropdown1',
+ *                      'content' => 'Anim pariatur cliche...',
+ *                  ),
+ *             ),
+ *         ),
+ *     ),
+ * ));
+ * ```
+ *
+ * @see http://twitter.github.io/bootstrap/javascript.html#tabs
+ * @author Antonio Ramirez <amigo.cobos@gmail.com>
+ * @since 2.0
+ */
+class Tabs extends Widget
+{
+	/**
+	 * @var array list of tabs in the tabs widget. Each array element represents a single
+	 * tab with the following structure:
+	 *
+	 * ```php
+	 * array(
+	 *     // required, the header (HTML) of the tab
+	 *     'header' => 'Tab label',
+	 *     // optional the HTML attributes of the tab header `LI` tag container
+	 *     'headerOptions'=> array(...),
+	 *     // required, the content (HTML) of the tab
+	 *     'content' => 'Mauris mauris ante, blandit et, ultrices a, suscipit eget...',
+	 *     // optional the HTML attributes of the tab content container
+	 *     'options'=> array(...),
+	 *     // optional, an array of items so to dipslay a dropdown menu on the tab header
+	 *     // ***Important*** if `items` is set, then `content` will be ignored
+	 *     'items'=> array(...)
+	 * )
+	 * ```
+	 */
+	public $items = array();
+	/**
+	 * @var int keeps track of the tabs count so to provide a correct id in case it has not been specified.
+	 */
+	protected $counter = 0;
+
+
+	/**
+	 * Initializes the widget.
+	 */
+	public function init()
+	{
+		parent::init();
+		$this->addCssClass($this->options, 'nav');
+	}
+
+	/**
+	 * Renders the widget.
+	 */
+	public function run()
+	{
+		echo $this->renderHeaders($this->items, $this->options) . "\n";
+		$this->counter = 0; // reset tab counter
+		echo Html::beginTag('div', array('class' => 'tab-content')) . "\n";
+		echo $this->renderContents($this->items) . "\n";
+		echo Html::endTag('div') . "\n";
+		$this->registerPlugin('tab');
+	}
+
+	/**
+	 * @param array $items the items to render in the header.
+	 * @param array $options the HTML attributes of the menu container.
+	 * @return string the rendering result.
+	 * @throws InvalidConfigException
+	 */
+	protected function renderHeaders($items, $options = array())
+	{
+		$headers = array();
+
+		for ($i = 0, $count = count($items); $i < $count; $i++) {
+			$item = $items[$i];
+			if (!isset($item['header'])) {
+				throw new InvalidConfigException("The 'header' option is required.");
+			}
+			$headerOptions = ArrayHelper::getValue($item, 'headerOptions', array());
+			if ($this->counter === 0) {
+				$this->addCssClass($headerOptions, 'active');
+			}
+			if (isset($item['items'])) {
+				$this->getView()->registerAssetBundle("yii/bootstrap/dropdown");
+				$this->addCssClass($headerOptions, 'dropdown');
+				$headers[] = Html::tag(
+					'li',
+					Html::a($item['header'] . ' <b class="caret"></b>', "#", array(
+						'class' => 'dropdown-toggle',
+						'data-toggle' => 'dropdown'
+					)) .
+					$this->renderHeaders($item['items'], array('class' => 'dropdown-menu')),
+					$headerOptions
+				);
+			} else {
+				$contentOptions = ArrayHelper::getValue($item, 'options', array());
+				$id = ArrayHelper::getValue($contentOptions, 'id', $this->options['id'] . '-tab' . $this->counter++);
+				$headers[] = Html::tag('li', Html::a($item['header'], "#$id", array('data-toggle' => 'tab')), $headerOptions);
+			}
+		}
+
+		return Html::tag('ul', implode("\n", $headers), $options);
+	}
+
+	/**
+	 * Renders tabs contents as specified on [[items]].
+	 * @param array $items the items to get the contents from.
+	 * @return string the rendering result.
+	 * @throws InvalidConfigException
+	 */
+	protected function renderContents($items)
+	{
+		$contents = array();
+		foreach ($items as $item) {
+			if (!isset($item['content']) && !isset($item['items'])) {
+				throw new InvalidConfigException("The 'content' option is required.");
+			}
+			$options = ArrayHelper::getValue($item, 'options', array());
+			$this->addCssClass($options, 'tab-pane');
+
+			if ($this->counter === 0) {
+				$this->addCssClass($options, 'active');
+			}
+			if (isset($item['items'])) {
+				$contents[] = $this->renderContents($item['items']);
+			} else {
+				$options['id'] = ArrayHelper::getValue($options, 'id', $this->options['id'] . '-tab' . $this->counter++);
+				$contents[] = Html::tag('div', $item['content'], $options);
+			}
+		}
+
+		return implode("\n", $contents);
+	}
+}
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