PHP class completion for frontend model tag

Author: konarshankar07

src/com/magento/idea/magento2plugin/completion/xml/XmlCompletionContributor.java

@@ -71,6 +71,13 @@ public XmlCompletionContributor() {
                 new PhpClassCompletionProvider()
         );
 
+        // <frontend_model>completion</frontend_model>
+        extend(CompletionType.BASIC,
+                psiElement(XmlTokenType.XML_DATA_CHARACTERS)
+                        .inside(XmlPatterns.xmlTag().withName(SystemXml.XML_TAG_FRONTEND_MODEL)),
+                new PhpClassCompletionProvider()
+        );
+
         /* File Path Completion provider */
         extend(CompletionType.BASIC, psiElement(XmlTokenType.XML_ATTRIBUTE_VALUE_TOKEN)
                         .inside(XmlPatterns.xmlAttribute().withName(LayoutXml.XML_ATTRIBUTE_TEMPLATE)),

src/com/magento/idea/magento2plugin/magento/files/SystemXml.java

@@ -0,0 +1,9 @@
+/*
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+package com.magento.idea.magento2plugin.magento.files;
+
+public class SystemXml {
+    public static String XML_TAG_FRONTEND_MODEL = "frontend_model";
+}