[XmlCompletion] #91 - Added php class completion for source_model tag in system.xml and source_model parameter tag attribute in widget.xml

Author: bohar

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

@@ -103,6 +103,23 @@ public XmlCompletionContributor() {
             new PhpConstructorArgumentCompletionProvider()
         );
 
+        // <source_model>php class completion</source_model> in system.xml files.
+        extend(CompletionType.BASIC, psiElement(XmlTokenType.XML_DATA_CHARACTERS)
+            .inside(XmlPatterns.xmlTag().withName(ModuleSystemXml.SOURCE_MODEL_ELEMENT_NAME)
+                .withParent(XmlPatterns.xmlTag().withName(ModuleSystemXml.FIELD_ELEMENT_NAME))
+            ).inFile(xmlFile().withName(string().endsWith(ModuleSystemXml.FILE_NAME))),
+            new PhpClassCompletionProvider()
+        );
+
+        // <parameter source_model="completion">...</parameter> in widget.xml files.
+        extend(CompletionType.BASIC, psiElement(XmlTokenType.XML_ATTRIBUTE_VALUE_TOKEN)
+            .inside(XmlPatterns.xmlAttribute().withName(ModuleWidgetXml.ATTRIBUTE_SOURCE_MODEL_NAME)
+                .withParent(XmlPatterns.xmlTag().withName(ModuleWidgetXml.TAG_PARAMETER_NAME).
+                    withParent(XmlPatterns.xmlTag().withName(ModuleWidgetXml.TAG_PARAMETERS_NAME)))
+            ).inFile(xmlFile().withName(string().endsWith(ModuleWidgetXml.FILE_NAME))),
+                new PhpClassCompletionProvider()
+        );
+
         // <service method="methodName"/>
         extend(CompletionType.BASIC, psiElement(XmlTokenType.XML_ATTRIBUTE_VALUE_TOKEN)
                 .inside(XmlPatterns.xmlAttribute().withName("method")

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

@@ -0,0 +1,11 @@
+/*
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+package com.magento.idea.magento2plugin.magento.files;
+
+public class ModuleSystemXml {
+    public static final String FILE_NAME = "system.xml";
+    public static final String FIELD_ELEMENT_NAME = "field";
+    public static final String SOURCE_MODEL_ELEMENT_NAME = "source_model";
+}

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

@@ -0,0 +1,13 @@
+/*
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+package com.magento.idea.magento2plugin.magento.files;
+
+public class ModuleWidgetXml {
+    public static final String FILE_NAME = "widget.xml";
+    public static final String TAG_WIDGET_NAME = "widget";
+    public static final String TAG_PARAMETERS_NAME = "parameters";
+    public static final String TAG_PARAMETER_NAME = "parameter";
+    public static final String ATTRIBUTE_SOURCE_MODEL_NAME = "source_model";
+}