[FEATURE] Introduce "from" operation

This allows for retrieving the results of a query operation starting
at a given offset.

Not yet tested with workspace compliance, but should do.

Author: robertlemke

Classes/Flowpack/ElasticSearch/ContentRepositoryAdaptor/Eel/ElasticSearchQueryBuilder.php

@@ -55,6 +55,11 @@ class ElasticSearchQueryBuilder implements \TYPO3\Eel\ProtectedContextAwareInter
 	 */
 	protected $limit;
 
+	/**
+	 * @var integer
+	 */
+	protected $from;
+
 	/**
 	 * The ElasticSearch request, as it is being built up.
 	 * @var array
@@ -209,6 +214,24 @@ public function limit($limit) {
 		return $this;
 	}
 
+	/**
+	 * output records starting at $from
+	 *
+	 *
+	 * @param integer $from
+	 * @return ElasticSearchQueryBuilder
+	 */
+	public function from($from) {
+		if (!$from) {
+			return $this;
+		}
+
+		$this->from = $from;
+		$this->request['from'] = $from;
+
+		return $this;
+	}
+
 	/**
 	 * add an exact-match query for a given property
 	 *