Add ValidatableDialog class

src/main/java/com/redhat/devtools/lsp4ij/launching/ui/NewLanguageServerDialog.java

@@ -12,7 +12,6 @@
 
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.ui.ComboBox;
-import com.intellij.openapi.ui.DialogWrapper;
 import com.intellij.openapi.ui.ValidationInfo;
 import com.intellij.ui.DocumentAdapter;
 import com.intellij.ui.SimpleListCellRenderer;
@@ -25,6 +24,7 @@
 import com.redhat.devtools.lsp4ij.launching.templates.LanguageServerTemplateManager;
 import com.redhat.devtools.lsp4ij.server.definition.launching.UserDefinedLanguageServerDefinition;
 import com.redhat.devtools.lsp4ij.settings.ui.LanguageServerPanel;
+import com.redhat.devtools.lsp4ij.settings.ui.ValidatableDialog;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -39,7 +39,7 @@
 /**
  * New language server dialog.
  */
-public class NewLanguageServerDialog extends DialogWrapper {
+public class NewLanguageServerDialog extends ValidatableDialog {
 
     private final ComboBox<LanguageServerTemplate> templateCombo = new ComboBox<>(new DefaultComboBoxModel<>(getLanguageServerTemplates()));
     private final Project project;
@@ -69,7 +69,7 @@ public NewLanguageServerDialog(@NotNull Project project) {
         // Template combo
         createTemplateCombo(builder);
         // Create server name,  command line, mappings, configuration UI
-        this.languageServerPanel = new LanguageServerPanel(builder, null, LanguageServerPanel.EditionMode.NEW_USER_DEFINED);
+        this.languageServerPanel = new LanguageServerPanel(builder, null, LanguageServerPanel.EditionMode.NEW_USER_DEFINED, this);
 
         // Add validation
         addValidator(this.languageServerPanel.getServerName());
@@ -164,20 +164,9 @@ public JComponent getPreferredFocusedComponent() {
 
     @Override
     protected @NotNull List<ValidationInfo> doValidateAll() {
-        List<ValidationInfo> validations = new ArrayList<>();
-        addValidationInfo(this.languageServerPanel.getCommandLine().getValidationInfo(), validations);
-        addValidationInfo(this.languageServerPanel.getServerName().getValidationInfo(), validations);
-        return validations;
+        return languageServerPanel.doValidateAll();
     }
 
-    private void addValidationInfo(ValidationInfo validationInfo, List<ValidationInfo> validations) {
-        if (validationInfo == null) {
-            return;
-        }
-        validations.add((validationInfo));
-    }
-
-
     @Override
     protected void doOKAction() {
         super.doOKAction();

src/main/java/com/redhat/devtools/lsp4ij/settings/LanguageServerView.java

@@ -33,6 +33,7 @@
 import com.redhat.devtools.lsp4ij.server.definition.launching.UserDefinedLanguageServerDefinition;
 import com.redhat.devtools.lsp4ij.settings.ui.LanguageServerPanel;
 import com.redhat.devtools.lsp4ij.settings.ui.ServerMappingsPanel;
+import com.redhat.devtools.lsp4ij.settings.ui.ValidatableDialog;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -51,7 +52,7 @@
  *     <li>Suspend and wait for a debugger?</li>
  * </ul>
  */
-public class LanguageServerView extends DialogWrapper implements Disposable {
+public class LanguageServerView extends ValidatableDialog implements Disposable {
 
     private final LanguageServerNameProvider languageServerNameProvider;
 
@@ -71,7 +72,7 @@ public LanguageServerView(@NotNull LanguageServerDefinition languageServerDefini
                               @Nullable LanguageServerNameProvider languageServerNameProvider,
                               @NotNull Project project
     ) {
-        super(true);
+        super(project);
         this.languageServerDefinition = languageServerDefinition;
         this.languageServerNameProvider = languageServerNameProvider;
         this.project = project;
@@ -288,7 +289,7 @@ private JPanel createSettings(JComponent description, boolean launchingServerDef
         this.languageServerPanel = new LanguageServerPanel(builder,
                 description,
                 launchingServerDefinition ? LanguageServerPanel.EditionMode.EDIT_USER_DEFINED :
-                        LanguageServerPanel.EditionMode.EDIT_EXTENSION);
+                        LanguageServerPanel.EditionMode.EDIT_EXTENSION, this);
         this.mappingPanel = languageServerPanel.getMappingsPanel();
         return builder
                 .addComponentFillVertically(new JPanel(), 50)

src/main/java/com/redhat/devtools/lsp4ij/settings/ui/LanguageServerPanel.java

@@ -12,6 +12,7 @@
 
 import com.intellij.ide.BrowserUtil;
 import com.intellij.openapi.ui.ComboBox;
+import com.intellij.openapi.ui.ValidationInfo;
 import com.intellij.ui.*;
 import com.intellij.ui.components.JBCheckBox;
 import com.intellij.ui.components.JBScrollPane;
@@ -25,7 +26,11 @@
 import org.jetbrains.annotations.NotNull;
 
 import javax.swing.*;
+import javax.swing.event.DocumentEvent;
+import javax.swing.text.JTextComponent;
 import java.awt.*;
+import java.util.ArrayList;
+import java.util.List;
 
 /**
  * Language server panel which show information about language server in several tabs:
@@ -56,8 +61,10 @@ public enum EditionMode {
     private LanguageServerConfigurationWidget configurationWidget;
 
     private LanguageServerInitializationOptionsWidget initializationOptionsWidget;
+    private final ValidatableDialog dialogWrapper;
 
-    public LanguageServerPanel(FormBuilder builder, JComponent description, EditionMode mode) {
+    public LanguageServerPanel(FormBuilder builder, JComponent description, EditionMode mode, ValidatableDialog dialogWrapper) {
+        this.dialogWrapper = dialogWrapper;
         createUI(builder, description, mode);
     }
 
@@ -75,6 +82,13 @@ private void createUI(FormBuilder builder, JComponent description, EditionMode m
         }
         // Debug tab
         addDebugTab(tabbedPane, mode);
+
+        // Add validation
+        var serverName = getServerName();
+        if (serverName != null) {
+            addValidator(serverName);
+        }
+        addValidator(getCommandLine());
     }
 
     private void addServerTab(JBTabbedPane tabbedPane, JComponent description, EditionMode mode) {
@@ -229,4 +243,34 @@ public ComboBox<ServerTrace> getServerTraceComboBox() {
     public ComboBox<ErrorReportingKind> getErrorReportingKindCombo() {
         return errorReportingKindCombo;
     }
+
+    public @NotNull List<ValidationInfo> doValidateAll() {
+        List<ValidationInfo> validations = new ArrayList<>();
+        var serverName = getServerName();
+        if (serverName != null) {
+            addValidationInfo(serverName.getValidationInfo(), validations);
+        }
+        var commandLine = getCommandLine();
+        if (commandLine != null) {
+            addValidationInfo(commandLine.getValidationInfo(), validations);
+        }
+        return validations;
+    }
+
+    private void addValidationInfo(ValidationInfo validationInfo, List<ValidationInfo> validations) {
+        if (validationInfo == null) {
+            return;
+        }
+        validations.add((validationInfo));
+    }
+
+
+    private void addValidator(JTextComponent textComponent) {
+        textComponent.getDocument().addDocumentListener(new DocumentAdapter() {
+            @Override
+            protected void textChanged(@NotNull DocumentEvent e) {
+                dialogWrapper.refreshValidation();
+            }
+        });
+    }
 }

src/main/java/com/redhat/devtools/lsp4ij/settings/ui/ValidatableDialog.java

@@ -0,0 +1,19 @@
+package com.redhat.devtools.lsp4ij.settings.ui;
+
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.ui.DialogWrapper;
+
+public abstract class ValidatableDialog extends DialogWrapper {
+    public ValidatableDialog(Project project) {
+        super(project);
+    }
+
+    public void refreshValidation() {
+        super.initValidation();
+    }
+
+    @Override
+    protected boolean continuousValidation() {
+        return false;
+    }
+}