added carousel widget

framework/yii/bootstrap/Carousel.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;
+use yii\base\InvalidConfigException;
+use yii\base\Model;
+use yii\helpers\base\ArrayHelper;
+use yii\helpers\Html;
+
+/**
+ * Carousel renders a carousel bootstrap javascript component.
+ *
+ * For example,
+ *
+ * ```php
+ * echo Carousel::widget(array(
+ *     'items' => array(
+ *         array(
+ *             'src' => 'http://twitter.github.io/bootstrap/assets/img/bootstrap-mdo-sfmoma-01.jpg',
+ *         ),
+ *         array(
+ *             'src' => 'http://twitter.github.io/bootstrap/assets/img/bootstrap-mdo-sfmoma-02.jpg',
+ *             'captionLabel' => 'This is the caption label',
+ *             'captionText' => 'This is the caption text'
+ *         ),
+ *     )
+ * ));
+ * ```
+ *
+ * @see http://twitter.github.io/bootstrap/javascript.html#carousel
+ * @author Antonio Ramirez <amigo.cobos@gmail.com>
+ * @since 2.0
+ */
+class Carousel extends Widget
+{
+	/**
+	 * @var string the previous button label. Defaults to '&lsaquo;'.
+	 */
+	public $previousLabel = '&lsaquo;';
+	/**
+	 * @var string the next button label. Defaults to '&rsaquo;'.
+	 */
+	public $nextLabel = '&rsaquo;';
+	/**
+	 * @var boolean indicates whether the carousel should slide items.
+	 */
+	public $slide = true;
+	/**
+	 * @var boolean indicates whether to display the previous and next links.
+	 */
+	public $displayPreviousAndNext = true;
+	/**
+	 * @var array list of images to appear in the carousel. If this property is empty,
+	 * the widget will not render anything. Each array element represents a single image in the carousel
+	 * with the following structure:
+	 *
+	 * ```php
+	 * array(
+	 *     'src' => 'src of the image',  // required
+	 *     'options' => ['html attributes of the item'], // optional
+	 *     'imageOptions'=> ['html attributes of the image'] // optional
+	 *     'captionLabel' => 'Title of the caption', // optional
+	 *     'captionOptions' => ['html attributes of the caption'], // optional
+	 *     'captionText' => 'Caption text, long description', // optional
+	 *     'visible' => 'boolean', // optional, whether to display the item or not
+	 * )
+	 * ```
+	 */
+	public $items = array();
+
+
+	/**
+	 * Initializes the widget.
+	 */
+	public function init()
+	{
+		parent::init();
+		$this->getView()->registerAssetBundle('yii/bootstrap/carousel');
+		$this->initOptions();
+	}
+
+	/**
+	 * Renders the widget.
+	 */
+	public function run()
+	{
+		if (empty($this->items)) {
+			return;
+		}
+
+		echo Html::beginTag('div', $this->options) . "\n";
+		$this->renderIndicators() . "\n";
+		$this->renderItems() . "\n";
+		$this->renderPreviousAndNext() . "\n";
+		echo Html::endTag('div') . "\n";
+	}
+
+	/**
+	 * Renders carousel indicators
+	 */
+	public function renderIndicators()
+	{
+		echo Html::beginTag('ol', array('class' => 'carousel-indicators')) . "\n";
+		for ($i = 0, $ln = count($this->items); $i < $ln; $i++) {
+			$options = array('data-target' => '#' . $this->options['id'], 'data-slide-to' => $i);
+			if ($i === 0) {
+				$this->addCssClass($options, 'active');
+			}
+			echo Html::tag('li', '', $options) . "\n";
+		}
+		echo Html::endTag('ol') . "\n";
+	}
+
+	/**
+	 * Renders carousel items as specified on [[items]]
+	 */
+	public function renderItems()
+	{
+		echo Html::beginTag('div', array('class' => 'carousel-inner')) . "\n";
+		for ($i = 0, $ln = count($this->items); $i < $ln; $i++) {
+			echo $this->renderItem($this->items[$i], $i);
+		}
+		echo Html::endTag('div') . "\n";
+	}
+
+	/**
+	 * Renders a single carousel item
+	 * @param array $item a single item from [[items]]
+	 * @param integer $index the item index as the first item should be set to `active`
+	 */
+	public function renderItem($item, $index)
+	{
+		$itemOptions = ArrayHelper::getValue($item, 'options', array());
+		$this->addCssClass($itemOptions, 'item');
+		if ($index === 0) {
+			$this->addCssClass($itemOptions, 'active');
+		}
+		echo Html::beginTag('div', $itemOptions) . "\n";
+		echo Html::img($item['src'], ArrayHelper::getValue($item, 'imageOptions', array())) . "\n";
+
+		if (ArrayHelper::getValue($item, 'captionLabel')) {
+			$this->renderCaptioN($item);
+		}
+
+		echo Html::endTag('div') . "\n";
+
+	}
+
+	/**
+	 * Renders the caption of an item
+	 * @param array $item a single item from [[items]]
+	 */
+	public function renderCaption($item)
+	{
+		$captionOptions = ArrayHelper::getValue($item, 'captionOptions', array());
+		$this->addCssClass($captionOptions, 'carousel-caption');
+
+		echo Html::beginTag('div', $captionOptions) . "\n";
+		echo Html::tag('h4', ArrayHelper::getValue($item, 'captionLabel')) . "\n";
+		echo Html::tag('p', ArrayHelper::getValue($item, 'captionText', '')) . "\n";
+		echo Html::endTag('div');
+	}
+
+	/**
+	 * Renders previous and next button if [[displayPreviousAndNext]] is set to `true`
+	 */
+	public function renderPreviousAndNext()
+	{
+		if (!$this->displayPreviousAndNext) {
+			return;
+		}
+		echo Html::a($this->previousLabel, '#' . $this->options['id'], array(
+				'class' => 'left carousel-control',
+				'data-slide' => 'prev'
+			)) .
+			"\n" .
+			Html::a($this->nextLabel, '#' . $this->options['id'], array(
+				'class' => 'right carousel-control',
+				'data-slide' => 'next'
+			)) .
+			"\n";
+	}
+
+	/**
+	 * Initializes the widget options.
+	 * This method sets the default values for various options.
+	 */
+	public function initOptions()
+	{
+		$this->addCssClass($this->options, 'carousel');
+		if ($this->slide) {
+			$this->addCssClass($this->options, 'slide');
+		}
+	}
+}
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