Persist endpoint selection to project configuration.

(cherry picked from commit ef5bed3)

Author: jimkyndemeyer

src/main/com/intellij/lang/jsgraphql/ide/endpoints/JSGraphQLEndpointsModel.java

@@ -7,14 +7,40 @@
  */
 package com.intellij.lang.jsgraphql.ide.endpoints;
 
+import com.intellij.ide.util.PropertiesComponent;
 import org.jdesktop.swingx.combobox.ListComboBoxModel;
 
+import javax.swing.event.ListDataEvent;
+import javax.swing.event.ListDataListener;
 import java.util.List;
 
 public class JSGraphQLEndpointsModel extends ListComboBoxModel<JSGraphQLEndpoint> {
 
-    public JSGraphQLEndpointsModel(List<JSGraphQLEndpoint> list) {
+    private final static String INDEX_PROPERTY_NAME = JSGraphQLEndpointsModel.class.getName() + ".index";
+
+    public JSGraphQLEndpointsModel(List<JSGraphQLEndpoint> list, PropertiesComponent propertiesComponent) {
         super(list);
+        if(!list.isEmpty()) {
+            int defaultSelectedIndex = propertiesComponent.getInt(INDEX_PROPERTY_NAME, 0);
+            if(defaultSelectedIndex >= 0 && defaultSelectedIndex < list.size()) {
+                setSelectedItem(list.get(defaultSelectedIndex));
+            }
+        }
+        this.addListDataListener(new ListDataListener() {
+            @Override
+            public void intervalAdded(ListDataEvent listDataEvent) {}
+
+            @Override
+            public void intervalRemoved(ListDataEvent listDataEvent) {}
+
+            @Override
+            public void contentsChanged(ListDataEvent listDataEvent) {
+                final JSGraphQLEndpoint selectedItem = getSelectedItem();
+                if(selectedItem != null) {
+                    propertiesComponent.setValue(INDEX_PROPERTY_NAME, list.indexOf(selectedItem), 0);
+                }
+            }
+        });
     }
 
     public void reload(List<JSGraphQLEndpoint> newEndpoints) {

src/main/com/intellij/lang/jsgraphql/ide/project/JSGraphQLLanguageUIProjectService.java

@@ -22,6 +22,7 @@
 import com.intellij.icons.AllIcons;
 import com.intellij.ide.projectView.ProjectView;
 import com.intellij.ide.projectView.impl.ProjectViewPane;
+import com.intellij.ide.util.PropertiesComponent;
 import com.intellij.json.JsonFileType;
 import com.intellij.lang.javascript.psi.JSFile;
 import com.intellij.lang.jsgraphql.JSGraphQLFileType;
@@ -339,7 +340,7 @@ private JComponent createHeaderComponent(FileEditor fileEditor, Editor editor) {
 
         // configured endpoints combo box
         final List<JSGraphQLEndpoint> endpoints = JSGraphQLConfigurationProvider.getService(myProject).getEndpoints();
-        final JSGraphQLEndpointsModel endpointsModel = new JSGraphQLEndpointsModel(endpoints);
+        final JSGraphQLEndpointsModel endpointsModel = new JSGraphQLEndpointsModel(endpoints, PropertiesComponent.getInstance(myProject));
         final ComboBox endpointComboBox = new ComboBox(endpointsModel);
         endpointComboBox.setToolTipText("GraphQL endpoint");
         editor.putUserData(JS_GRAPH_QL_ENDPOINTS_MODEL, endpointsModel);