Add dialog and action for creating new autoconfig files

src/main/java/de/gebit/intellij/autoconfig/create/CreateAutoconfigFileAction.java

@@ -0,0 +1,81 @@
+package de.gebit.intellij.autoconfig.create;
+
+import com.intellij.ide.IdeView;
+import com.intellij.ide.actions.CreateInDirectoryActionBase;
+import com.intellij.ide.actions.OpenFileAction;
+import com.intellij.openapi.actionSystem.ActionManager;
+import com.intellij.openapi.actionSystem.AnAction;
+import com.intellij.openapi.actionSystem.AnActionEvent;
+import com.intellij.openapi.actionSystem.LangDataKeys;
+import com.intellij.openapi.application.WriteAction;
+import com.intellij.openapi.diagnostic.Logger;
+import com.intellij.openapi.editor.Document;
+import com.intellij.openapi.fileEditor.FileDocumentManager;
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.psi.PsiDocumentManager;
+import com.intellij.psi.PsiFile;
+import de.gebit.intellij.autoconfig.UpdateHandler;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.IOException;
+import java.util.Optional;
+
+/**
+ * An action to create/open an Autoconfig file for a specific handler/plugin
+ */
+public class CreateAutoconfigFileAction extends CreateInDirectoryActionBase {
+	private static final @NotNull Logger LOGGER = Logger.getInstance(CreateAutoconfigFileAction.class);
+
+	@Override
+	public void actionPerformed(@NotNull AnActionEvent e) {
+		Project project = e.getProject();
+		if (project != null) {
+			CreateAutoconfigFileDialog autoconfigFileDialog = new CreateAutoconfigFileDialog();
+			if (!autoconfigFileDialog.showAndGet()) {
+				// the dialog has been canceled
+				return;
+			}
+			// the update handler selected in the dialogs form
+			Optional<UpdateHandler<?>> optionalUpdateHandler = autoconfigFileDialog.getSelectedHandler();
+			if (optionalUpdateHandler.isEmpty()) {
+				return;
+			}
+			UpdateHandler<?> updateHandler = optionalUpdateHandler.get();
+			VirtualFile projectFile = project.getProjectFile();
+			if (projectFile == null) {
+				LOGGER.warn("No project file? This is unusual. We can't automatically create a new Autoconfig file then. Please create it yourself.");
+				return;
+			}
+			try {
+				VirtualFile updateHandlerFile = WriteAction.compute(() -> {
+					VirtualFile autoconfigDirectory = projectFile.getParent().findChild("autoconfig");
+					if (autoconfigDirectory == null) {
+						// no ".idea/autoconfig" directory found. We're going to create it.
+						autoconfigDirectory = projectFile.getParent().createChildDirectory(this, "autoconfig");
+					}
+					return autoconfigDirectory.findOrCreateChildData(this, updateHandler.getFileName());
+				});
+				if (updateHandlerFile != null) {
+					// we open the file
+					OpenFileAction.openFile(updateHandlerFile, project);
+					Document document = FileDocumentManager.getInstance().getDocument(updateHandlerFile);
+					PsiFile psiFile = PsiDocumentManager.getInstance(project).getPsiFile(document);
+					IdeView ideView = e.getData(LangDataKeys.IDE_VIEW);
+					if (psiFile != null && ideView != null) {
+						// and then focus the project/file view on the file
+						ideView.selectElement(psiFile);
+					}
+					ActionManager actionManager = ActionManager.getInstance();
+					AnAction codeCompletion = actionManager.getAction("CodeCompletion");
+					// and then we invoke code-completion on the possibly newly created opened file.
+					// now=false because otherwise it might get executed before other IDE actions are done,
+					// which would result in it losing its focus right away
+					actionManager.tryToExecute(codeCompletion, null, null, null, false);
+				}
+			} catch (IOException ex) {
+				LOGGER.error("Couldn't create Autoconfig file!", ex);
+			}
+		}
+	}
+}

src/main/java/de/gebit/intellij/autoconfig/create/CreateAutoconfigFileDialog.java

@@ -0,0 +1,33 @@
+package de.gebit.intellij.autoconfig.create;
+
+import com.intellij.openapi.ui.DialogWrapper;
+import de.gebit.intellij.autoconfig.AutoconfigStartup;
+import de.gebit.intellij.autoconfig.UpdateHandler;
+import org.jetbrains.annotations.Nullable;
+
+import javax.swing.*;
+import java.util.Optional;
+
+/**
+ * DialogWrapper for {@link CreateAutoconfigFileForm}, creating the form with all available configuration updaters.
+ */
+public class CreateAutoconfigFileDialog extends DialogWrapper {
+
+	private CreateAutoconfigFileForm autoconfigFileForm;
+
+	protected CreateAutoconfigFileDialog() {
+		super(false);
+		init();
+		setTitle("Create Autoconfig File");
+	}
+
+	@Override
+	protected @Nullable JComponent createCenterPanel() {
+		autoconfigFileForm = new CreateAutoconfigFileForm(AutoconfigStartup.EP_NAME.getExtensionList());
+		return autoconfigFileForm.getForm();
+	}
+
+	public Optional<UpdateHandler<?>> getSelectedHandler() {
+		return autoconfigFileForm.getSelectedHandler();
+	}
+}

src/main/java/de/gebit/intellij/autoconfig/create/CreateAutoconfigFileForm.form

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<form xmlns="http://www.intellij.com/uidesigner/form/" version="1" bind-to-class="de.gebit.intellij.autoconfig.create.CreateAutoconfigFileForm">
+  <grid id="27dc6" binding="form" layout-manager="GridLayoutManager" row-count="3" column-count="1" same-size-horizontally="false" same-size-vertically="false" hgap="-1" vgap="-1">
+    <margin top="0" left="0" bottom="0" right="0"/>
+    <constraints>
+      <xy x="20" y="20" width="500" height="400"/>
+    </constraints>
+    <properties/>
+    <border type="none"/>
+    <children>
+      <component id="d216" class="javax.swing.JComboBox" binding="handlerSelection">
+        <constraints>
+          <grid row="1" column="0" row-span="1" col-span="1" vsize-policy="0" hsize-policy="2" anchor="8" fill="1" indent="0" use-parent-layout="false"/>
+        </constraints>
+        <properties/>
+      </component>
+      <component id="42ea1" class="javax.swing.JLabel">
+        <constraints>
+          <grid row="0" column="0" row-span="1" col-span="1" vsize-policy="0" hsize-policy="0" anchor="8" fill="0" indent="0" use-parent-layout="false"/>
+        </constraints>
+        <properties>
+          <text value="Select which Plugin to create the Autoconfig File for"/>
+        </properties>
+      </component>
+      <vspacer id="56603">
+        <constraints>
+          <grid row="2" column="0" row-span="1" col-span="1" vsize-policy="6" hsize-policy="1" anchor="0" fill="2" indent="0" use-parent-layout="false"/>
+        </constraints>
+      </vspacer>
+    </children>
+  </grid>
+</form>

src/main/java/de/gebit/intellij/autoconfig/create/CreateAutoconfigFileForm.java

@@ -0,0 +1,74 @@
+package de.gebit.intellij.autoconfig.create;
+
+import com.intellij.uiDesigner.core.GridConstraints;
+import com.intellij.uiDesigner.core.GridLayoutManager;
+import com.intellij.uiDesigner.core.Spacer;
+import de.gebit.intellij.autoconfig.UpdateHandler;
+import lombok.Getter;
+
+import javax.swing.*;
+import java.awt.*;
+import java.util.List;
+import java.util.Optional;
+
+/**
+ * Form displaying a dropdown with {@link UpdateHandler}s to choose from
+ */
+public class CreateAutoconfigFileForm {
+
+	private JComboBox<HandlerComboBoxWrapper> handlerSelection;
+	@Getter
+	private JPanel form;
+
+	public CreateAutoconfigFileForm(List<UpdateHandler<?>> handlers) {
+		ComboBoxModel<HandlerComboBoxWrapper> comboBoxModel = new DefaultComboBoxModel<HandlerComboBoxWrapper>(handlers.stream().map(HandlerComboBoxWrapper::new).toArray(HandlerComboBoxWrapper[]::new));
+		handlerSelection.setModel(comboBoxModel);
+	}
+
+	{
+// GUI initializer generated by IntelliJ IDEA GUI Designer
+// >>> IMPORTANT!! <<<
+// DO NOT EDIT OR ADD ANY CODE HERE!
+		$$$setupUI$$$();
+	}
+
+	/**
+	 * Method generated by IntelliJ IDEA GUI Designer >>> IMPORTANT!! <<< DO NOT edit this method OR call it in your code!
+	 *
+	 * @noinspection ALL
+	 */
+	private void $$$setupUI$$$() {
+		form = new JPanel();
+		form.setLayout(new GridLayoutManager(3, 1, new Insets(0, 0, 0, 0), -1, -1));
+		handlerSelection = new JComboBox();
+		form.add(handlerSelection, new GridConstraints(1, 0, 1, 1, GridConstraints.ANCHOR_WEST, GridConstraints.FILL_HORIZONTAL, GridConstraints.SIZEPOLICY_CAN_GROW, GridConstraints.SIZEPOLICY_FIXED, null, null, null, 0, false));
+		final JLabel label1 = new JLabel();
+		label1.setText("Select which Plugin to create the Autoconfig File for");
+		form.add(label1, new GridConstraints(0, 0, 1, 1, GridConstraints.ANCHOR_WEST, GridConstraints.FILL_NONE, GridConstraints.SIZEPOLICY_FIXED, GridConstraints.SIZEPOLICY_FIXED, null, null, null, 0, false));
+		final Spacer spacer1 = new Spacer();
+		form.add(spacer1, new GridConstraints(2, 0, 1, 1, GridConstraints.ANCHOR_CENTER, GridConstraints.FILL_VERTICAL, 1, GridConstraints.SIZEPOLICY_WANT_GROW, null, null, null, 0, false));
+	}
+
+	/**
+	 * @noinspection ALL
+	 */
+	public JComponent $$$getRootComponent$$$() {
+		return form;
+	}
+
+	private record HandlerComboBoxWrapper(UpdateHandler<?> handler) {
+		@Override
+		public String toString() {
+			return handler.getUpdaterName();
+		}
+	}
+
+	public Optional<UpdateHandler<?>> getSelectedHandler() {
+		if (handlerSelection.getSelectedItem() instanceof HandlerComboBoxWrapper handlerComboBoxWrapper) {
+			return Optional.of(handlerComboBoxWrapper.handler());
+		} else {
+			return Optional.empty();
+		}
+	}
+
+}

src/main/resources/META-INF/plugin.xml

@@ -39,4 +39,10 @@
     <extensions defaultExtensionNs="de.gebit.intellij.autoconfig">
         <configurationUpdater implementation="de.gebit.intellij.autoconfig.handlers.CommonConfigurationHandler"/>
     </extensions>
+    <actions>
+        <group id="AutoConfigGroup" popup="true" text="Autoconfig">
+            <action id="CreateAutoconfigFileAction" class="de.gebit.intellij.autoconfig.create.CreateAutoconfigFileAction" text="Create Autoconfig File" description="Create a new Autoconfig File"/>
+            <add-to-group group-id="ToolsMenu" anchor="after" relative-to-action="ExternalToolsGroup"/>
+        </group>
+    </actions>
 </idea-plugin>

src/main/resources/schema/config.schema.json

@@ -77,7 +77,7 @@
         },
         "mode": {
           "type": "string",
-          "description": "Reload on any changes or only reload on external changes e.g. from version control?",
+          "description": "Reload on any changes or only reload on external changes/from version control?",
           "enum": [
             "any-changes",
             "external-changes"