add BoostCakeHtml::image() for holder.js

Test/Case/View/Helper/BoostCakeHtmlHelperTest.php

@@ -26,4 +26,16 @@ public function testUseTag() {
 		));
 	}
 
+	public function testImage() {
+		$result = $this->Html->image('', array('data-src' => 'holder.js/24x24'));
+		$this->assertTags($result, array(
+			'img' => array('src' => '/', 'data-src' => 'holder.js/24x24', 'alt' => '')
+		));
+
+		$result = $this->Html->image('some.jpg', array('data-src' => 'holder.js/24x24'));
+		$this->assertTags($result, array(
+			'img' => array('src' => '/img/some.jpg', 'alt' => '')
+		));
+	}
+
 }

View/Helper/BoostCakeHtmlHelper.php

@@ -26,4 +26,43 @@ public function useTag($tag) {
 		return $html;
 	}
 
+/**
+ * Creates a formatted IMG element.
+ *
+ * This method will set an empty alt attribute if one is not supplied.
+ *
+ * ### Usage:
+ *
+ * Create a regular image:
+ *
+ * `echo $this->Html->image('cake_icon.png', array('alt' => 'CakePHP'));`
+ *
+ * Create an image link:
+ *
+ * `echo $this->Html->image('cake_icon.png', array('alt' => 'CakePHP', 'url' => 'http://cakephp.org'));`
+ *
+ * ### Options:
+ *
+ * - `url` If provided an image link will be generated and the link will point at
+ *   `$options['url']`.
+ * - `fullBase` If true the src attribute will get a full address for the image file.
+ * - `plugin` False value will prevent parsing path as a plugin
+ * - `data-src` For holder.js options. If `$path` is not empty, then unset `$options['data-src']`.
+ *
+ * @param string $path Path to the image file, relative to the app/webroot/img/ directory.
+ * @param array $options Array of HTML attributes. See above for special options.
+ * @return string completed img tag
+ * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/html.html#HtmlHelper::image
+ */
+	public function image($path, $options = array()) {
+		if (empty($path)) {
+			$path = '/';
+		} else {
+			if (isset($options['data-src'])) {
+				unset($options['data-src']);
+			}
+		}
+		return parent::image($path, $options);
+	}
+
 }