feat(i18n): allow selecting message XML file via file browser

- Updated the I18n settings to allow selecting the message bundle XML file directly via a file browser (TextFieldWithBrowseButton).
- Modified I18nUtils to load message files via absolute paths from project settings, improving reliability.
- Bumped plugin version to 3.2.2 and updated change notes.

build.gradle.kts

@@ -5,7 +5,7 @@ plugins {
 }
 
 group = "com.sdk.dynform.tools"
-version = "3.2.0"
+version = "3.2.2"
 
 repositories {
   mavenCentral()
@@ -39,6 +39,15 @@ intellijPlatform {
     }
 
     changeNotes = """
+        <h2>[3.2.2]</h2>
+        <ul>
+          <li><strong>UI/UX Improvement:</strong> Updated the I18n settings to allow selecting the message bundle XML file directly via a file browser, improving configuration usability.</li>
+          <li><strong>Core Enhancement:</strong> Modified I18nUtils to load message files via absolute paths from project settings, increasing reliability across different project structures.</li>
+        </ul>
+        <h2>[3.2.1]</h2>
+        <ul>
+          <li><strong>Bug Fix:</strong> Resolved a <code>ConcurrentModificationException</code> in the I18n cache mechanism caused by concurrent background thread access.</li>
+        </ul>
         <h2>[3.2.0]</h2>
         <ul>
           <li><strong>Schema Validation:</strong> Introduced project-level automatic XSD registration. Configure a target folder and namespace prefix to seamlessly map <code>.xsd</code> files to the <code>ExternalResourceManager</code>.</li>

src/main/java/com/sdk/dynform/tools/config/DynFormConfigurable.java

@@ -1,11 +1,13 @@
 package com.sdk.dynform.tools.config;
 
+import com.intellij.openapi.fileChooser.FileChooserDescriptor;
 import com.intellij.openapi.fileChooser.FileChooserDescriptorFactory;
 import com.intellij.openapi.options.Configurable;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.ui.TextComponentAccessor;
 import com.intellij.openapi.ui.TextFieldWithBrowseButton;
 import com.intellij.openapi.util.NlsContexts;
+import com.intellij.openapi.vfs.VirtualFile;
 import com.sdk.dynform.tools.dynform.DynFormXsdScanner;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -20,6 +22,7 @@ public class DynFormConfigurable implements Configurable {
     private JRadioButton inlayBtn;
     private JRadioButton disabledBtn;
     private JCheckBox showIconCheck;
+    private TextFieldWithBrowseButton i18nMessageFileField;
     private TextFieldWithBrowseButton xsdFolderField;
     private JTextField xsdPrefixField;
 
@@ -43,27 +46,58 @@ public class DynFormConfigurable implements Configurable {
         gbc.insets = new Insets(5, 5, 5, 5);
 
         // --- I18n Settings Group ---
-        JPanel i18nPanel = new JPanel();
+        JPanel i18nPanel = new JPanel(new GridBagLayout());
-        i18nPanel.setLayout(new BoxLayout(i18nPanel, BoxLayout.Y_AXIS));
         i18nPanel.setBorder(BorderFactory.createTitledBorder("Internationalization (i18n)"));
 
-        i18nPanel.add(new JLabel("Message Display Mode:"));
+        GridBagConstraints i18nGbc = new GridBagConstraints();
+        i18nGbc.fill = GridBagConstraints.HORIZONTAL;
+        i18nGbc.insets = new Insets(2, 2, 2, 2);
+        i18nGbc.gridx = 0;
+        i18nGbc.gridy = 0;
+        i18nGbc.weightx = 0.0;
+
+        i18nPanel.add(new JLabel("Message Display Mode:"), i18nGbc);
+
+        i18nGbc.gridy++;
         foldingBtn = new JRadioButton("Folding (Hide key, show translation)");
+        i18nPanel.add(foldingBtn, i18nGbc);
+
+        i18nGbc.gridy++;
         inlayBtn = new JRadioButton("Inlay Hints (Show translation next to key)");
+        i18nPanel.add(inlayBtn, i18nGbc);
+
+        i18nGbc.gridy++;
         disabledBtn = new JRadioButton("Disabled");
+        i18nPanel.add(disabledBtn, i18nGbc);
 
         ButtonGroup group = new ButtonGroup();
         group.add(foldingBtn);
         group.add(inlayBtn);
         group.add(disabledBtn);
 
-        i18nPanel.add(foldingBtn);
+        i18nGbc.gridy++;
-        i18nPanel.add(inlayBtn);
-        i18nPanel.add(disabledBtn);
-
-        i18nPanel.add(Box.createVerticalStrut(10));
         showIconCheck = new JCheckBox("Show icon in code completion");
-        i18nPanel.add(showIconCheck);
+        i18nPanel.add(showIconCheck, i18nGbc);
+
+        i18nGbc.gridy++;
+        i18nGbc.weightx = 0.0;
+        i18nPanel.add(new JLabel("Message Bundle File:"), i18nGbc);
+
+        i18nGbc.gridx = 1;
+        i18nGbc.weightx = 1.0;
+        i18nMessageFileField = new TextFieldWithBrowseButton();
+        
+        FileChooserDescriptor xmlDescriptor = new FileChooserDescriptor(true, false, false, false, false, false) {
+            @Override
+            public boolean isFileVisible(VirtualFile file, boolean showHiddenFiles) {
+                return super.isFileVisible(file, showHiddenFiles) && (file.isDirectory() || "xml".equalsIgnoreCase(file.getExtension()));
+            }
+        };
+        
+        i18nMessageFileField.addBrowseFolderListener("Select Message XML File", "Select the main message bundle XML file",
+                project, xmlDescriptor, TextComponentAccessor.TEXT_FIELD_WHOLE_TEXT);
+                
+        i18nPanel.add(i18nMessageFileField, i18nGbc);
 
         mainPanel.add(i18nPanel, gbc);
 
@@ -121,6 +155,7 @@ public class DynFormConfigurable implements Configurable {
         DynFormSettings settings = DynFormSettings.getInstance(project);
         return settings.displayMode != getCurrentModeFromUI() ||
                settings.showIcon != showIconCheck.isSelected() ||
+               !settings.i18nMessageFile.equals(i18nMessageFileField.getText()) ||
                !settings.xsdFolderPath.equals(xsdFolderField.getText()) ||
                !settings.xsdPrefix.equals(xsdPrefixField.getText());
     }
@@ -130,6 +165,7 @@ public class DynFormConfigurable implements Configurable {
         DynFormSettings settings = DynFormSettings.getInstance(project);
         settings.displayMode = getCurrentModeFromUI();
         settings.showIcon = showIconCheck.isSelected();
+        settings.i18nMessageFile = i18nMessageFileField.getText();
         settings.xsdFolderPath = xsdFolderField.getText();
         settings.xsdPrefix = xsdPrefixField.getText();
 
@@ -155,6 +191,7 @@ public class DynFormConfigurable implements Configurable {
             case DISABLED: disabledBtn.setSelected(true); break;
         }
         showIconCheck.setSelected(settings.showIcon);
+        i18nMessageFileField.setText(settings.i18nMessageFile);
         xsdFolderField.setText(settings.xsdFolderPath);
         xsdPrefixField.setText(settings.xsdPrefix);
     }

src/main/java/com/sdk/dynform/tools/config/DynFormSettings.java

@@ -22,6 +22,7 @@ public class DynFormSettings implements PersistentStateComponent<DynFormSettings
 
     public DisplayMode displayMode = DisplayMode.FOLDING;
     public boolean showIcon = true;
+    public String i18nMessageFile = "message.xml";
     public String xsdFolderPath = "";
     public String xsdPrefix = "/dynf";
 

src/main/java/com/sdk/dynform/tools/i18n/I18nUtils.java

@@ -1,6 +1,7 @@
 package com.sdk.dynform.tools.i18n;
 
 import com.intellij.openapi.project.Project;
+import com.intellij.openapi.vfs.LocalFileSystem;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.PsiElement;
 import com.intellij.psi.PsiFile;
@@ -9,31 +10,50 @@ import com.intellij.psi.search.FilenameIndex;
 import com.intellij.psi.search.GlobalSearchScope;
 import com.intellij.psi.xml.XmlFile;
 import com.intellij.psi.xml.XmlTag;
+import com.sdk.dynform.tools.config.DynFormSettings;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.*;
+import java.util.concurrent.ConcurrentHashMap;
 
 public class I18nUtils {
 
-    private static final List<String> MESSAGE_FILENAMES = Arrays.asList("message.xml", "message_th.xml", "message_en.xml");
-
     @NotNull
     public static List<XmlFile> findMessageFiles(@NotNull Project project) {
+        DynFormSettings settings = DynFormSettings.getInstance(project);
+        String filePath = settings.i18nMessageFile.trim();
+
         List<XmlFile> result = new ArrayList<>();
-        for (String filename : MESSAGE_FILENAMES) {
+        if (filePath.isEmpty()) {
+            return result;
+        }
+
+        // Try to find the file using its absolute path
+        VirtualFile file = LocalFileSystem.getInstance().findFileByPath(filePath);
+        
+        // If not found by absolute path, fallback to searching by filename in the project
+        if (file == null) {
+            String filename = new java.io.File(filePath).getName();
             Collection<VirtualFile> files = FilenameIndex.getVirtualFilesByName(filename, GlobalSearchScope.everythingScope(project));
-            for (VirtualFile file : files) {
+            for (VirtualFile vFile : files) {
-                PsiFile psiFile = PsiManager.getInstance(project).findFile(file);
+                addXmlFile(project, vFile, result);
+            }
+        } else {
+            addXmlFile(project, file, result);
+        }
+
+        return result;
+    }
+
+    private static void addXmlFile(Project project, VirtualFile virtualFile, List<XmlFile> result) {
+        PsiFile psiFile = PsiManager.getInstance(project).findFile(virtualFile);
         if (psiFile instanceof XmlFile) {
             result.add((XmlFile) psiFile);
         }
     }
-        }
-        return result;
-    }
 
-    private static final Map<String, Map<String, String>> cache = new LinkedHashMap<>();
+    private static final Map<String, Map<String, String>> cache = new ConcurrentHashMap<>();
     private static long lastCacheUpdate = 0;
     private static final long CACHE_TIMEOUT = 5000; // 5 seconds
 
@@ -138,7 +158,7 @@ public class I18nUtils {
         return result.toString().trim();
     }
 
-    private static void updateCache(@NotNull Project project) {
+    private static synchronized void updateCache(@NotNull Project project) {
         long currentTime = System.currentTimeMillis();
         if (currentTime - lastCacheUpdate < CACHE_TIMEOUT && !cache.isEmpty()) {
             return;

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

@@ -34,6 +34,15 @@
     ]]></description>
 
     <change-notes><![CDATA[
+      <h2>[3.2.2]</h2>
+        <ul>
+          <li><strong>UI/UX Improvement:</strong> Updated the I18n settings to allow selecting the message bundle XML file directly via a file browser, improving configuration usability.</li>
+          <li><strong>Core Enhancement:</strong> Modified I18nUtils to load message files via absolute paths from project settings, increasing reliability across different project structures.</li>
+        </ul>
+      <h2>[3.2.1]</h2>
+        <ul>
+          <li><strong>Bug Fix:</strong> Resolved a <code>ConcurrentModificationException</code> in the I18n cache mechanism caused by concurrent background thread access.</li>
+        </ul>
       <h2>[3.2.0]</h2>
         <ul>
           <li><strong>Schema Validation:</strong> Introduced project-level automatic XSD registration. Configure a target folder and namespace prefix to seamlessly map <code>.xsd</code> files to the <code>ExternalResourceManager</code>.</li>