API: Add default setting for OpenSearch limit parameter

This is done as part of a GCI 2013 task.

Bug: 30089
Change-Id: I4c1a850520976a5b8b433feee4807c5f6960e3ac

RELEASE-NOTES-1.23

@@ -37,6 +37,8 @@ production.
 * (bug 56033) Add content model to the page information.
 * Added Article::MissingArticleConditions hook to give extensions a chance to
   hide their (unrelated) log entries.
+* Added $wgOpenSearchDefaultLimit defining the default number of entries to show
+  on action=opensearch API call.
 
 === Bug fixes in 1.23 ===
 * (bug 41759) The "updated since last visit" markers (on history pages, recent

includes/DefaultSettings.php

@@ -5236,6 +5236,12 @@ $wgOpenSearchTemplate = false;
  */
 $wgEnableOpenSearchSuggest = true;
 
+/**
+ * Integer defining default number of entries to show on
+ * OpenSearch call.
+ */
+$wgOpenSearchDefaultLimit = 10;
+
 /**
  * Expiry time for search suggestion responses
  */

includes/api/ApiOpenSearch.php

@@ -90,10 +90,12 @@ class ApiOpenSearch extends ApiBase {
 	}
 
 	public function getAllowedParams() {
+		global $wgOpenSearchDefaultLimit;
+
 		return array(
 			'search' => null,
 			'limit' => array(
-				ApiBase::PARAM_DFLT => 10,
+				ApiBase::PARAM_DFLT => $wgOpenSearchDefaultLimit,
 				ApiBase::PARAM_TYPE => 'limit',
 				ApiBase::PARAM_MIN => 1,
 				ApiBase::PARAM_MAX => 100,