Merge pull request #108 from marhali/feat/next

Feat/next

CHANGELOG.md

@@ -3,6 +3,24 @@
 # easy-i18n Changelog
 
 ## [Unreleased]
+### BREAKING CHANGES
+- Configuration rework. Existing settings will be lost and must be configured via the new configuration page
+
+### Added
+- Key delimiters (namespace / section) can be configured
+- Extract translation intention
+- Full language support for Java, Kotlin, JavaScript / TypeScript, Vue and PHP
+- Expand already expanded nodes after data update
+- Experimental option to force translation key folding
+- Individual icon for tool-window and lookup items
+- Dedicated configuration file (easy-i18n.xml) inside <kbd>.idea</kbd> folder
+
+### Changed
+- Editor assistance has been reengineered. This will affect key suggestion and annotation
+- Moved configuration dialog into own page inside <kbd>IDE Settings</kbd> 
+
+### Fixed
+- AlreadyDisposedException on FileChangeListener after project dispose
 
 ## [3.2.0]
 ### Added

README.md

@@ -91,6 +91,9 @@ _For more examples, please refer to the [Examples Directory](https://github.com/
 ## Roadmap
 
 - [X] JSON5 Support
+- [X] Configurable namespace and section separators
+- [X] Define default namespace to use if none was provided
+- [X] Enhance editor code assistance
 - [ ] XML Support
 - [ ] Mark duplicate translation values
 

gradle.properties

@@ -4,7 +4,7 @@
 pluginGroup = de.marhali.easyi18n
 pluginName = easy-i18n
 # SemVer format -> https://semver.org
-pluginVersion = 3.2.0
+pluginVersion = 4.0.0-rc.1
 
 # See https://plugins.jetbrains.com/docs/intellij/build-number-ranges.html
 # for insight into build numbers and IntelliJ Platform versions.
@@ -17,7 +17,7 @@ platformVersion = 2021.3
 
 # Plugin Dependencies -> https://plugins.jetbrains.com/docs/intellij/plugin-dependencies.html
 # Example: platformPlugins = com.intellij.java, com.jetbrains.php:203.4449.22
-platformPlugins = org.jetbrains.kotlin, JavaScriptLanguage, org.jetbrains.plugins.vue:213.5744.223
+platformPlugins = org.jetbrains.kotlin, JavaScriptLanguage, org.jetbrains.plugins.vue:213.5744.223, com.jetbrains.php:213.5744.279
 
 # Java language level used to compile sources and to generate the files for - Java 11 is required since 2020.3
 javaVersion = 11

src/main/java/de/marhali/easyi18n/DataBus.java

@@ -1,9 +1,9 @@
 package de.marhali.easyi18n;
 
-import de.marhali.easyi18n.model.KeyPath;
 import de.marhali.easyi18n.model.bus.BusListener;
 import de.marhali.easyi18n.model.TranslationData;
 
+import de.marhali.easyi18n.model.KeyPath;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 

src/main/java/de/marhali/easyi18n/DataStore.java

@@ -7,10 +7,10 @@ import com.intellij.openapi.vfs.*;
 
 import de.marhali.easyi18n.exception.EmptyLocalesDirException;
 import de.marhali.easyi18n.io.IOHandler;
-import de.marhali.easyi18n.model.SettingsState;
 import de.marhali.easyi18n.model.TranslationData;
 import de.marhali.easyi18n.service.FileChangeListener;
-import de.marhali.easyi18n.service.SettingsService;
+import de.marhali.easyi18n.settings.ProjectSettings;
+import de.marhali.easyi18n.settings.ProjectSettingsService;
 import de.marhali.easyi18n.util.NotificationHelper;
 
 import org.jetbrains.annotations.NotNull;
@@ -35,7 +35,7 @@ public class DataStore {
         this.changeListener = new FileChangeListener(project);
 
         VirtualFileManager.getInstance().addAsyncFileListener(
-                this.changeListener, Disposer.newDisposable("EasyI18n"));
+                this.changeListener, Disposer.newDisposable(project, "EasyI18n"));
     }
 
     public @NotNull TranslationData getData() {
@@ -48,18 +48,18 @@ public class DataStore {
      * @param successResult Consumer will inform if operation was successful
      */
     public void loadFromPersistenceLayer(@NotNull Consumer<Boolean> successResult) {
-        SettingsState settings = SettingsService.getInstance(this.project).getState();
+        ProjectSettings settings = ProjectSettingsService.get(project).getState();
 
         ApplicationManager.getApplication().saveAll(); // Save opened files (required if new locales were added)
 
         ApplicationManager.getApplication().runReadAction(() -> {
             try {
                 this.data = new IOHandler(settings).read();
-                this.changeListener.updateLocalesPath(settings.getLocalesPath());
+                this.changeListener.updateLocalesPath(settings.getLocalesDirectory());
                 successResult.accept(true);
 
             } catch (Exception ex) {
-                this.data = new TranslationData(settings.isSortKeys());
+                this.data = new TranslationData(settings.isSorting());
                 successResult.accept(false);
 
                 if(ex instanceof EmptyLocalesDirException) {
@@ -76,7 +76,7 @@ public class DataStore {
      * @param successResult Consumer will inform if operation was successful
      */
     public void saveToPersistenceLayer(@NotNull Consumer<Boolean> successResult) {
-        SettingsState settings = SettingsService.getInstance(this.project).getState();
+        ProjectSettings settings = ProjectSettingsService.get(project).getState();
 
         ApplicationManager.getApplication().runWriteAction(() -> {
             try {

src/main/java/de/marhali/easyi18n/InstanceManager.java

@@ -3,7 +3,7 @@ package de.marhali.easyi18n;
 import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.project.Project;
 
-import de.marhali.easyi18n.model.TranslationUpdate;
+import de.marhali.easyi18n.model.action.TranslationUpdate;
 
 import org.jetbrains.annotations.NotNull;
 
@@ -52,13 +52,22 @@ public class InstanceManager {
         return this.bus;
     }
 
+    /**
+     * Reloads the plugin instance. Unsaved cached data will be deleted.
+     * Fetches data from persistence layer and notifies all endpoints via {@link DataBus}.
+     */
+    public void reload() {
+        store.loadFromPersistenceLayer((success) ->
+                bus.propagate().onUpdateData(store.getData()));
+    }
+
     public void processUpdate(TranslationUpdate update) {
         if(update.isDeletion() || update.isKeyChange()) { // Remove origin translation
             this.store.getData().setTranslation(update.getOrigin().getKey(), null);
         }
 
         if(!update.isDeletion()) { // Create or re-create translation with changed data
-            this.store.getData().setTranslation(update.getChange().getKey(), update.getChange().getTranslation());
+            this.store.getData().setTranslation(update.getChange().getKey(), update.getChange().getValue());
         }
 
         this.store.saveToPersistenceLayer(success -> {

src/main/java/de/marhali/easyi18n/action/AddAction.java

@@ -6,10 +6,10 @@ import com.intellij.openapi.actionSystem.AnActionEvent;
 import com.intellij.openapi.project.Project;
 import com.intellij.ui.content.Content;
 
-import de.marhali.easyi18n.model.KeyPath;
-import de.marhali.easyi18n.model.KeyPathConverter;
-import de.marhali.easyi18n.service.WindowManager;
 import de.marhali.easyi18n.dialog.AddDialog;
+import de.marhali.easyi18n.model.KeyPath;
+import de.marhali.easyi18n.service.WindowManager;
+import de.marhali.easyi18n.util.KeyPathConverter;
 import de.marhali.easyi18n.util.TreeUtil;
 
 import org.jetbrains.annotations.NotNull;
@@ -32,7 +32,7 @@ public class AddAction extends AnAction {
 
     @Override
     public void actionPerformed(@NotNull AnActionEvent e) {
-        new AddDialog(Objects.requireNonNull(e.getProject()), detectPreKey(e.getProject())).showAndHandle();
+        new AddDialog(Objects.requireNonNull(e.getProject()), detectPreKey(e.getProject()), null).showAndHandle();
     }
 
     private @Nullable KeyPath detectPreKey(@NotNull Project project) {
@@ -58,7 +58,7 @@ public class AddAction extends AnAction {
 
             if(row >= 0) {
                 String path = String.valueOf(window.getTableView().getTable().getValueAt(row, 0));
-                return converter.split(path);
+                return converter.fromString(path);
             }
         }
 

src/main/java/de/marhali/easyi18n/action/ReloadAction.java

@@ -8,6 +8,7 @@ import de.marhali.easyi18n.InstanceManager;
 
 import org.jetbrains.annotations.NotNull;
 
+import java.util.Objects;
 import java.util.ResourceBundle;
 
 /**
@@ -23,9 +24,6 @@ public class ReloadAction extends AnAction {
 
     @Override
     public void actionPerformed(@NotNull AnActionEvent e) {
-        InstanceManager manager = InstanceManager.get(e.getProject());
-        manager.store().loadFromPersistenceLayer((success) -> {
-            manager.bus().propagate().onUpdateData(manager.store().getData());
-        });
+        InstanceManager.get(Objects.requireNonNull(e.getProject())).reload();
     }
 }

src/main/java/de/marhali/easyi18n/action/SettingsAction.java

@@ -3,7 +3,10 @@ package de.marhali.easyi18n.action;
 import com.intellij.icons.AllIcons;
 import com.intellij.openapi.actionSystem.AnAction;
 import com.intellij.openapi.actionSystem.AnActionEvent;
-import de.marhali.easyi18n.dialog.SettingsDialog;
+import com.intellij.openapi.options.ShowSettingsUtil;
+
+import de.marhali.easyi18n.settings.ProjectSettingsConfigurable;
+
 import org.jetbrains.annotations.NotNull;
 
 import java.util.ResourceBundle;
@@ -21,6 +24,6 @@ public class SettingsAction extends AnAction {
 
     @Override
     public void actionPerformed(@NotNull AnActionEvent e) {
-        new SettingsDialog(e.getProject()).showAndHandle();
+        ShowSettingsUtil.getInstance().showSettingsDialog(e.getProject(), ProjectSettingsConfigurable.class);
     }
 }

src/main/java/de/marhali/easyi18n/assistance/OptionalAssistance.java

@@ -0,0 +1,17 @@
+package de.marhali.easyi18n.assistance;
+
+import com.intellij.openapi.project.Project;
+
+import de.marhali.easyi18n.settings.ProjectSettingsService;
+
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Used to define editor hooks as assistable.
+ * @author marhali
+ */
+public interface OptionalAssistance {
+    default boolean isAssistance(@NotNull Project project) {
+        return ProjectSettingsService.get(project).getState().isAssistance();
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/completion/JavaCompletionContributor.java

@@ -0,0 +1,17 @@
+package de.marhali.easyi18n.assistance.completion;
+
+import com.intellij.codeInsight.completion.CompletionContributor;
+import com.intellij.codeInsight.completion.CompletionType;
+import com.intellij.patterns.PlatformPatterns;
+import com.intellij.psi.PsiLiteralExpression;
+
+/**
+ * Java specific completion contributor.
+ * @author marhali
+ */
+public class JavaCompletionContributor extends CompletionContributor {
+    public JavaCompletionContributor() {
+        extend(CompletionType.BASIC, PlatformPatterns.psiElement().inside(PsiLiteralExpression.class),
+                new KeyCompletionProvider());
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/completion/JsCompletionContributor.java

@@ -0,0 +1,17 @@
+package de.marhali.easyi18n.assistance.completion;
+
+import com.intellij.codeInsight.completion.CompletionContributor;
+import com.intellij.codeInsight.completion.CompletionType;
+import com.intellij.lang.javascript.psi.JSLiteralExpression;
+import com.intellij.patterns.PlatformPatterns;
+
+/**
+ * JavaScript specific completion contributor.
+ * @author marhali
+ */
+public class JsCompletionContributor extends CompletionContributor {
+    public JsCompletionContributor() {
+        extend(CompletionType.BASIC, PlatformPatterns.psiElement().inside(JSLiteralExpression.class),
+                new KeyCompletionProvider());
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/completion/KeyCompletionProvider.java

@@ -0,0 +1,60 @@
+package de.marhali.easyi18n.assistance.completion;
+
+import com.intellij.codeInsight.completion.CompletionParameters;
+import com.intellij.codeInsight.completion.CompletionProvider;
+import com.intellij.codeInsight.completion.CompletionResultSet;
+import com.intellij.codeInsight.lookup.LookupElement;
+import com.intellij.codeInsight.lookup.LookupElementBuilder;
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.util.IconLoader;
+import com.intellij.util.ProcessingContext;
+
+import de.marhali.easyi18n.InstanceManager;
+import de.marhali.easyi18n.assistance.OptionalAssistance;
+import de.marhali.easyi18n.model.KeyPath;
+import de.marhali.easyi18n.model.Translation;
+import de.marhali.easyi18n.model.TranslationData;
+import de.marhali.easyi18n.settings.ProjectSettings;
+import de.marhali.easyi18n.settings.ProjectSettingsService;
+import de.marhali.easyi18n.util.KeyPathConverter;
+
+import org.jetbrains.annotations.NotNull;
+
+import javax.swing.*;
+import java.util.Set;
+
+/**
+ * Provides existing translation keys for code completion.
+ * @author marhali
+ */
+class KeyCompletionProvider extends CompletionProvider<CompletionParameters> implements OptionalAssistance {
+
+    private static final Icon icon = IconLoader.getIcon("/icons/translate13.svg", KeyCompletionProvider.class);
+
+    @Override
+    protected void addCompletions(@NotNull CompletionParameters parameters,
+                                  @NotNull ProcessingContext context, @NotNull CompletionResultSet result) {
+        Project project = parameters.getOriginalFile().getProject();
+
+        if(!isAssistance(project)) {
+            return;
+        }
+
+        ProjectSettings settings = ProjectSettingsService.get(project).getState();
+        TranslationData data = InstanceManager.get(project).store().getData();
+        Set<KeyPath> fullKeys = data.getFullKeys();
+
+        for (KeyPath key : fullKeys) {
+            result.addElement(constructLookup(new Translation(key, data.getTranslation(key)), settings));
+        }
+    }
+
+    private LookupElement constructLookup(Translation translation, ProjectSettings settings) {
+        KeyPathConverter converter = new KeyPathConverter(settings);
+
+        return LookupElementBuilder
+                .create(converter.toString(translation.getKey()))
+                .withTailText(" " + translation.getValue().get(settings.getPreviewLocale()), true)
+                .withIcon(icon);
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/completion/KtCompletionContributor.java

@@ -1,19 +1,16 @@
-package de.marhali.easyi18n.editor.kotlin;
+package de.marhali.easyi18n.assistance.completion;
 
 import com.intellij.codeInsight.completion.CompletionContributor;
 import com.intellij.codeInsight.completion.CompletionType;
 import com.intellij.patterns.PlatformPatterns;
-
-import de.marhali.easyi18n.editor.KeyCompletionProvider;
 import org.jetbrains.kotlin.psi.KtLiteralStringTemplateEntry;
 
 /**
- * Kotlin specific translation key completion contributor.
+ * Kotlin specific completion contributor.
  * @author marhali
  */
-public class KotlinKeyCompletionContributor  extends CompletionContributor {
-
-    public KotlinKeyCompletionContributor() {
+public class KtCompletionContributor extends CompletionContributor {
+    public KtCompletionContributor() {
         extend(CompletionType.BASIC, PlatformPatterns.psiElement().inside(KtLiteralStringTemplateEntry.class),
                 new KeyCompletionProvider());
     }

src/main/java/de/marhali/easyi18n/assistance/completion/PhpCompletionContributor.java

@@ -0,0 +1,17 @@
+package de.marhali.easyi18n.assistance.completion;
+
+import com.intellij.codeInsight.completion.CompletionContributor;
+import com.intellij.codeInsight.completion.CompletionType;
+import com.intellij.patterns.PlatformPatterns;
+import com.jetbrains.php.lang.psi.elements.StringLiteralExpression;
+
+/**
+ * Php specific completion contributor.
+ * @author marhali
+ */
+public class PhpCompletionContributor extends CompletionContributor {
+    public PhpCompletionContributor() {
+        extend(CompletionType.BASIC, PlatformPatterns.psiElement().inside(StringLiteralExpression.class),
+                new KeyCompletionProvider());
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/documentation/AbstractDocumentationProvider.java

@@ -0,0 +1,104 @@
+package de.marhali.easyi18n.assistance.documentation;
+
+import com.intellij.lang.documentation.DocumentationMarkup;
+import com.intellij.lang.documentation.DocumentationProvider;
+import com.intellij.openapi.project.Project;
+
+import de.marhali.easyi18n.InstanceManager;
+import de.marhali.easyi18n.assistance.OptionalAssistance;
+import de.marhali.easyi18n.model.KeyPath;
+import de.marhali.easyi18n.model.TranslationData;
+import de.marhali.easyi18n.model.TranslationNode;
+import de.marhali.easyi18n.settings.ProjectSettings;
+import de.marhali.easyi18n.settings.ProjectSettingsService;
+import de.marhali.easyi18n.util.KeyPathConverter;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.ResourceBundle;
+
+/**
+ * Provides locale values as documentation for translation keys.
+ * @author marhali
+ */
+abstract class AbstractDocumentationProvider implements DocumentationProvider, OptionalAssistance {
+
+    private static final ResourceBundle bundle = ResourceBundle.getBundle("messages");
+
+    /**
+     * Checks if the provided key is a valid translation-key and generates the equivalent documentation for it.
+     * @param project Opened project
+     * @param key Designated translation key
+     * @return Generated documentation or null if not responsible
+     */
+    protected @Nullable String generateDoc(@NotNull Project project, @Nullable String key) {
+        if(key == null || !isAssistance(project)) {
+            return null;
+        }
+
+        ProjectSettings settings = ProjectSettingsService.get(project).getState();
+        KeyPathConverter converter = new KeyPathConverter(settings);
+        KeyPath path = converter.fromString(key);
+
+        // So we want to take care of context and pluralization here
+        // we should check the last key section for plural / context delims and if so provide all leafs within the last node
+
+        if(path.isEmpty()) {
+            return null;
+        }
+
+        TranslationData data = InstanceManager.get(project).store().getData();
+        String leaf = path.remove(path.size() - 1);
+        TranslationNode leafNode = data.getRootNode();
+
+        for(String section : path) {
+            leafNode = leafNode.getChildren().get(section);
+            if(leafNode == null) { // Cannot resolve last node before leaf
+                return null;
+            }
+        }
+
+        Map<String, String> results = new LinkedHashMap<>();
+
+        // Filter results for matching leafs (contextual and pluralization support)
+        for (Map.Entry<String, TranslationNode> entry : leafNode.getChildren().entrySet()) {
+            if(entry.getKey().startsWith(leaf) && entry.getValue().isLeaf()) {
+                results.put(entry.getKey(), entry.getValue().getValue().get(settings.getPreviewLocale()));
+            }
+        }
+
+        if(results.isEmpty()) { // No results to show
+            return null;
+        }
+
+        StringBuilder builder = new StringBuilder();
+
+        builder.append(DocumentationMarkup.DEFINITION_START);
+        builder.append(bundle.getString("documentation"));
+        builder.append(DocumentationMarkup.DEFINITION_END);
+
+        if(results.size() == 1) { // Single value
+            builder.append(DocumentationMarkup.CONTENT_START);
+            builder.append("<strong>").append(results.values().toArray()[0]).append("</strong>");
+            builder.append(DocumentationMarkup.CONTENT_END);
+
+        } else { // Pluralization | Contextual relevant values
+            builder.append(DocumentationMarkup.SECTIONS_START);
+
+            for (Map.Entry<String, String> entry : results.entrySet()) {
+                builder.append(DocumentationMarkup.SECTION_HEADER_START);
+                builder.append(entry.getKey()).append(":");
+                builder.append(DocumentationMarkup.SECTION_SEPARATOR);
+                builder.append("<p>");
+                builder.append("<strong>").append(entry.getValue()).append("</strong>");
+            }
+
+            builder.append(DocumentationMarkup.SECTIONS_END);
+        }
+
+        return  builder.toString();
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/documentation/CommonDocumentationProvider.java

@@ -0,0 +1,26 @@
+package de.marhali.easyi18n.assistance.documentation;
+
+import com.intellij.psi.PsiElement;
+import de.marhali.easyi18n.assistance.reference.PsiKeyReference;
+import org.jetbrains.annotations.Nls;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Language unspecific documentation provider. Every supported language should register an extension to this EP.
+ * @author marhali
+ */
+public class CommonDocumentationProvider extends AbstractDocumentationProvider {
+
+    @Override
+    public @Nullable
+    @Nls String generateDoc(PsiElement element, @Nullable PsiElement originalElement) {
+        if(!(element instanceof PsiKeyReference.TranslationReference)) {
+            return null;
+        }
+
+        PsiKeyReference.TranslationReference keyReference = (PsiKeyReference.TranslationReference) element;
+        String value = keyReference.getName();
+
+        return generateDoc(element.getProject(), value);
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/folding/AbstractFoldingBuilder.java

@@ -0,0 +1,104 @@
+package de.marhali.easyi18n.assistance.folding;
+
+import com.intellij.lang.ASTNode;
+import com.intellij.lang.folding.FoldingBuilderEx;
+import com.intellij.lang.folding.FoldingDescriptor;
+import com.intellij.openapi.editor.Document;
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.util.Pair;
+import com.intellij.openapi.util.TextRange;
+import com.intellij.psi.PsiElement;
+
+import de.marhali.easyi18n.DataStore;
+import de.marhali.easyi18n.InstanceManager;
+import de.marhali.easyi18n.assistance.OptionalAssistance;
+import de.marhali.easyi18n.model.TranslationData;
+import de.marhali.easyi18n.model.TranslationValue;
+import de.marhali.easyi18n.settings.ProjectSettings;
+import de.marhali.easyi18n.settings.ProjectSettingsService;
+import de.marhali.easyi18n.util.KeyPathConverter;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * Language specific translation key folding with representative locale value.
+ * @author marhali
+ */
+abstract class AbstractFoldingBuilder extends FoldingBuilderEx implements OptionalAssistance {
+    /**
+     * Extract all relevant folding regions for the desired root element.
+     * The implementation does not need to verify if the character literal is a valid translation.
+     * @param root Root element
+     * @return found regions
+     */
+    abstract @NotNull List<Pair<String, PsiElement>> extractRegions(@NotNull PsiElement root);
+
+    /**
+     * Extract the text from the given node.
+     * @param node Node
+     * @return extracted text or null if not applicable
+     */
+    abstract @Nullable String extractText(@NotNull ASTNode node);
+
+    @Override
+    public FoldingDescriptor @NotNull [] buildFoldRegions(@NotNull PsiElement root, @NotNull Document document, boolean quick) {
+
+        if(quick || !isAssistance(root.getProject())) {
+            return FoldingDescriptor.EMPTY;
+        }
+
+        List<FoldingDescriptor> descriptors = new ArrayList<>();
+
+        ProjectSettings settings = ProjectSettingsService.get(root.getProject()).getState();
+        TranslationData data = InstanceManager.get(root.getProject()).store().getData();
+        KeyPathConverter converter = new KeyPathConverter(settings);
+
+        for(Pair<String, PsiElement> region : extractRegions(root)) {
+            if(data.getTranslation(converter.fromString(region.first)) == null) {
+                continue;
+            }
+
+            TextRange range = new TextRange(region.second.getTextRange().getStartOffset() + 1,
+                    region.second.getTextRange().getEndOffset() - 1);
+
+            // Some language implementations like [Vue Template] does not support FoldingGroup's
+            FoldingDescriptor descriptor = new FoldingDescriptor(region.second.getNode(), range,
+                    null, Set.of(), settings.isAlwaysFold());
+
+            descriptors.add(descriptor);
+        }
+
+        return descriptors.toArray(new FoldingDescriptor[0]);
+    }
+
+    @Override
+    public @Nullable String getPlaceholderText(@NotNull ASTNode node) {
+        String text = extractText(node);
+
+        if(text == null) {
+            return null;
+        }
+
+        Project project = node.getPsi().getProject();
+        DataStore store = InstanceManager.get(project).store();
+        KeyPathConverter converter = new KeyPathConverter(project);
+        TranslationValue localeValues = store.getData().getTranslation(converter.fromString(text));
+
+        if(localeValues == null) {
+            return null;
+        }
+
+        String previewLocale = ProjectSettingsService.get(project).getState().getPreviewLocale();
+        return localeValues.get(previewLocale);
+    }
+
+    @Override
+    public boolean isCollapsedByDefault(@NotNull ASTNode node) {
+        return true;
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/folding/JavaFoldingBuilder.java

@@ -0,0 +1,32 @@
+package de.marhali.easyi18n.assistance.folding;
+
+import com.intellij.lang.ASTNode;
+import com.intellij.openapi.util.Pair;
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.PsiLiteralExpression;
+import com.intellij.psi.util.PsiTreeUtil;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ * Java specific translation key folding.
+ * @author marhali
+ */
+public class JavaFoldingBuilder extends AbstractFoldingBuilder {
+    @Override
+    @NotNull List<Pair<String, PsiElement>> extractRegions(@NotNull PsiElement root) {
+        return PsiTreeUtil.findChildrenOfType(root, PsiLiteralExpression.class).stream().map(literalExpression ->
+                        Pair.pair(String.valueOf(literalExpression.getValue()), (PsiElement) literalExpression))
+                .collect(Collectors.toList());
+    }
+
+    @Override
+    @Nullable String extractText(@NotNull ASTNode node) {
+        PsiLiteralExpression literalExpression = node.getPsi(PsiLiteralExpression.class);
+        return String.valueOf(literalExpression.getValue());
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/folding/JsFoldingBuilder.java

@@ -0,0 +1,32 @@
+package de.marhali.easyi18n.assistance.folding;
+
+import com.intellij.lang.ASTNode;
+import com.intellij.lang.javascript.psi.JSLiteralExpression;
+import com.intellij.openapi.util.Pair;
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.util.PsiTreeUtil;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ * JavaScript specific translation key folding.
+ * @author marhali
+ */
+public class JsFoldingBuilder extends AbstractFoldingBuilder {
+    @Override
+    @NotNull List<Pair<String, PsiElement>> extractRegions(@NotNull PsiElement root) {
+        return PsiTreeUtil.findChildrenOfType(root, JSLiteralExpression.class).stream().map(literalExpression ->
+                        Pair.pair(literalExpression.getStringValue(), (PsiElement) literalExpression))
+                .collect(Collectors.toList());
+    }
+
+    @Override
+    @Nullable String extractText(@NotNull ASTNode node) {
+        JSLiteralExpression literalExpression = node.getPsi(JSLiteralExpression.class);
+        return literalExpression.getStringValue();
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/folding/KtFoldingBuilder.java

@@ -0,0 +1,45 @@
+package de.marhali.easyi18n.assistance.folding;
+
+import com.intellij.lang.ASTNode;
+import com.intellij.openapi.util.Pair;
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.util.PsiTreeUtil;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.jetbrains.kotlin.psi.KtStringTemplateEntry;
+import org.jetbrains.kotlin.psi.KtStringTemplateExpression;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Kotlin specific translation-key folding.
+ * @author marhali
+ */
+public class KtFoldingBuilder extends AbstractFoldingBuilder {
+    @Override
+    @NotNull List<Pair<String, PsiElement>> extractRegions(@NotNull PsiElement root) {
+        List<Pair<String, PsiElement>> regions = new ArrayList<>();
+
+        for (KtStringTemplateExpression templateExpression : PsiTreeUtil.findChildrenOfType(root, KtStringTemplateExpression.class)) {
+            for (KtStringTemplateEntry entry : templateExpression.getEntries()) {
+                regions.add(Pair.pair(entry.getText(), templateExpression));
+                break;
+            }
+        }
+
+        return regions;
+    }
+
+    @Override
+    @Nullable String extractText(@NotNull ASTNode node) {
+        KtStringTemplateExpression templateExpression = node.getPsi(KtStringTemplateExpression.class);
+
+        for (KtStringTemplateEntry entry : templateExpression.getEntries()) {
+            return entry.getText();
+        }
+
+        return null;
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/folding/PhpFoldingBuilder.java

@@ -0,0 +1,31 @@
+package de.marhali.easyi18n.assistance.folding;
+
+import com.intellij.lang.ASTNode;
+import com.intellij.openapi.util.Pair;
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.util.PsiTreeUtil;
+import com.jetbrains.php.lang.psi.elements.StringLiteralExpression;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ * Php specific translation key folding.
+ * @author marhali
+ */
+public class PhpFoldingBuilder extends AbstractFoldingBuilder {
+    @Override
+    @NotNull List<Pair<String, PsiElement>> extractRegions(@NotNull PsiElement root) {
+        return PsiTreeUtil.findChildrenOfType(root, StringLiteralExpression.class).stream().map(literalExpression ->
+                        Pair.pair(literalExpression.getContents(), (PsiElement) literalExpression))
+                .collect(Collectors.toList());
+    }
+
+    @Override
+    @Nullable String extractText(@NotNull ASTNode node) {
+        StringLiteralExpression literalExpression = node.getPsi(StringLiteralExpression.class);
+        return literalExpression.getContents();
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/intention/AbstractTranslationIntention.java

@@ -0,0 +1,138 @@
+package de.marhali.easyi18n.assistance.intention;
+
+import com.intellij.codeInsight.intention.BaseElementAtCaretIntentionAction;
+import com.intellij.codeInspection.util.IntentionFamilyName;
+import com.intellij.codeInspection.util.IntentionName;
+import com.intellij.openapi.command.WriteCommandAction;
+import com.intellij.openapi.editor.Caret;
+import com.intellij.openapi.editor.Document;
+import com.intellij.openapi.editor.Editor;
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.util.TextRange;
+import com.intellij.psi.PsiElement;
+import com.intellij.util.IncorrectOperationException;
+
+import de.marhali.easyi18n.InstanceManager;
+import de.marhali.easyi18n.assistance.OptionalAssistance;
+import de.marhali.easyi18n.dialog.AddDialog;
+import de.marhali.easyi18n.dialog.EditDialog;
+import de.marhali.easyi18n.model.KeyPath;
+import de.marhali.easyi18n.model.Translation;
+import de.marhali.easyi18n.model.TranslationData;
+import de.marhali.easyi18n.model.TranslationValue;
+import de.marhali.easyi18n.settings.ProjectSettings;
+import de.marhali.easyi18n.settings.ProjectSettingsService;
+import de.marhali.easyi18n.util.KeyPathConverter;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ResourceBundle;
+
+/**
+ * Intention for translation related use-cases.
+ * Can be used to extract (create) translations or to edit existing ones.
+ * @author marhali
+ */
+abstract class AbstractTranslationIntention extends BaseElementAtCaretIntentionAction implements OptionalAssistance {
+
+    protected static final ResourceBundle bundle = ResourceBundle.getBundle("messages");
+
+    private boolean existingTranslation = false;
+
+    @Override
+    public @IntentionName @NotNull String getText() {
+        return existingTranslation
+                ? bundle.getString("action.edit")
+                : bundle.getString("action.extract");
+    }
+
+    @Override
+    public @NotNull @IntentionFamilyName String getFamilyName() {
+        return "EasyI18n";
+    }
+
+    @Override
+    public boolean startInWriteAction() {
+        return false;
+    }
+
+    /**
+     * This is the only method a language-specific translation intention needs to implement.
+     * The implementation needs to verify element type and extract the relevant key literal or value.
+     * @param element Element at caret
+     * @return extract translation key (not verified!) or null if intention is not applicable for this element
+     */
+    protected abstract @Nullable String extractText(@NotNull PsiElement element);
+
+    @NotNull TextRange convertRange(@NotNull TextRange input) {
+        return new TextRange(input.getStartOffset(), input.getEndOffset());
+    }
+
+    @Override
+    public boolean isAvailable(@NotNull Project project, Editor editor, @NotNull PsiElement element) {
+        if(!isAssistance(project)) {
+           return false;
+        }
+
+        String text = extractText(element);
+
+        if(text != null) {
+            KeyPathConverter converter = new KeyPathConverter(project);
+            existingTranslation = InstanceManager.get(project).store().getData()
+                    .getTranslation(converter.fromString(text)) != null;
+        }
+
+        return text != null;
+    }
+
+    @Override
+    public void invoke(@NotNull Project project, Editor editor, @NotNull PsiElement element)
+            throws IncorrectOperationException {
+
+        ProjectSettings settings = ProjectSettingsService.get(project).getState();
+        KeyPathConverter converter = new KeyPathConverter(settings);
+
+        String text = extractText(element);
+
+        if(text == null) {
+            throw new IncorrectOperationException("Cannot extract translation intention at caret");
+        }
+
+        TranslationData data = InstanceManager.get(project).store().getData();
+        KeyPath path = converter.fromString(text);
+        TranslationValue existingTranslation = data.getTranslation(path);
+
+        // Existing translation - edit dialog
+        if(existingTranslation != null) {
+            new EditDialog(project, new Translation(path, existingTranslation)).showAndHandle();
+            return;
+        }
+
+        // Extract translation by key
+        // We assume that a text is a translation-key if it contains section delimiters and does not end with them
+        if(text.contains(settings.getSectionDelimiter()) && !text.endsWith(settings.getSectionDelimiter())) {
+            new AddDialog(project, path, null).showAndHandle();
+            return;
+        }
+
+        // Extract translation by preview locale value
+        AddDialog dialog = new AddDialog(project, new KeyPath(), text);
+
+        dialog.registerCallback(translationUpdate -> { // Replace text at caret with chosen translation key
+            if(editor != null) {
+                Document doc = editor.getDocument();
+                Caret caret = editor.getCaretModel().getPrimaryCaret();
+                TextRange range = convertRange(element.getTextRange());
+
+                WriteCommandAction.runWriteCommandAction(project, () ->
+                        doc.replaceString(range.getStartOffset(), range.getEndOffset(),
+                                converter.toString(translationUpdate.getChange().getKey())));
+
+                caret.removeSelection();
+            }
+        });
+
+        dialog.showAndHandle();
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/intention/JavaTranslationIntention.java

@@ -0,0 +1,27 @@
+package de.marhali.easyi18n.assistance.intention;
+
+import com.intellij.openapi.util.TextRange;
+import com.intellij.psi.*;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Java specific translation intention.
+ * @author marhali
+ */
+public class JavaTranslationIntention extends AbstractTranslationIntention {
+    @Override
+    protected @Nullable String extractText(@NotNull PsiElement element) {
+        if(!(element.getParent() instanceof PsiLiteralExpression)) {
+            return null;
+        }
+
+        return String.valueOf(((PsiLiteralExpression) element.getParent()).getValue());
+    }
+
+    @Override
+    @NotNull TextRange convertRange(@NotNull TextRange input) {
+        return new TextRange(input.getStartOffset() + 1, input.getEndOffset() - 1);
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/intention/JsTranslationIntention.java

@@ -0,0 +1,28 @@
+package de.marhali.easyi18n.assistance.intention;
+
+import com.intellij.lang.javascript.psi.JSLiteralExpression;
+import com.intellij.openapi.util.TextRange;
+import com.intellij.psi.PsiElement;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * JavaScript specific translation key intention.
+ * @author marhali
+ */
+public class JsTranslationIntention extends AbstractTranslationIntention {
+    @Override
+    protected @Nullable String extractText(@NotNull PsiElement element) {
+        if(!(element.getParent() instanceof JSLiteralExpression)) {
+            return null;
+        }
+
+        return ((JSLiteralExpression) element.getParent()).getStringValue();
+    }
+
+    @Override
+    @NotNull TextRange convertRange(@NotNull TextRange input) {
+        return new TextRange(input.getStartOffset() + 1, input.getEndOffset() - 1);
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/intention/KtTranslationIntention.java

@@ -0,0 +1,23 @@
+package de.marhali.easyi18n.assistance.intention;
+
+import com.intellij.psi.PsiElement;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.jetbrains.kotlin.psi.KtLiteralStringTemplateEntry;
+
+/**
+ * Kotlin specific translation key intention.
+ * @author marhali
+ */
+public class KtTranslationIntention extends AbstractTranslationIntention {
+    @Override
+    protected @Nullable String extractText(@NotNull PsiElement element) {
+        if(!(element.getParent() instanceof KtLiteralStringTemplateEntry)) {
+            return null;
+        }
+
+        KtLiteralStringTemplateEntry expression = (KtLiteralStringTemplateEntry) element.getParent();
+        return expression.getText();
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/intention/PhpTranslationIntention.java

@@ -0,0 +1,23 @@
+package de.marhali.easyi18n.assistance.intention;
+
+import com.intellij.openapi.util.TextRange;
+import com.intellij.psi.PsiElement;
+import com.jetbrains.php.lang.psi.elements.StringLiteralExpression;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Php specific translation intention
+ * @author marhali
+ */
+public class PhpTranslationIntention extends AbstractTranslationIntention {
+    @Override
+    protected @Nullable String extractText(@NotNull PsiElement element) {
+        if(!(element.getParent() instanceof StringLiteralExpression)) {
+            return null;
+        }
+
+        return ((StringLiteralExpression) element.getParent()).getContents();
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/reference/AbstractKeyReferenceContributor.java

@@ -0,0 +1,53 @@
+package de.marhali.easyi18n.assistance.reference;
+
+import com.intellij.openapi.project.Project;
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.PsiReference;
+import com.intellij.psi.PsiReferenceContributor;
+import de.marhali.easyi18n.InstanceManager;
+import de.marhali.easyi18n.assistance.OptionalAssistance;
+import de.marhali.easyi18n.model.KeyPath;
+import de.marhali.easyi18n.model.Translation;
+import de.marhali.easyi18n.model.TranslationValue;
+import de.marhali.easyi18n.settings.ProjectSettings;
+import de.marhali.easyi18n.settings.ProjectSettingsService;
+import de.marhali.easyi18n.util.KeyPathConverter;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Language specific translation key reference contributor.
+ * @author marhali
+ */
+abstract class AbstractKeyReferenceContributor extends PsiReferenceContributor implements OptionalAssistance {
+    /**
+     * Searches for relevant translation-key references
+     * @param project Opened project
+     * @param element Targeted element
+     * @param text Designated translation key
+     * @return Matched translation-key reference(s)
+     */
+    protected @NotNull PsiReference[] getReferences(
+            @NotNull Project project, @NotNull PsiElement element, @Nullable String text) {
+
+        if(text == null || text.isEmpty() || !isAssistance(project)) {
+            return PsiReference.EMPTY_ARRAY;
+        }
+
+        ProjectSettings settings = ProjectSettingsService.get(project).getState();
+        KeyPathConverter converter = new KeyPathConverter(settings);
+
+        // TODO: We should provide multiple references if not a leaf node was provided (contextual / plurals support)
+
+        KeyPath path = converter.fromString(text);
+        TranslationValue values = InstanceManager.get(project).store().getData().getTranslation(path);
+
+        if(values == null) { // We only reference valid and existing translations
+            return PsiReference.EMPTY_ARRAY;
+        }
+
+        return new PsiReference[] {
+                new PsiKeyReference(converter, new Translation(path, values), element)
+        };
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/reference/JavaKeyReferenceContributor.java

@@ -0,0 +1,41 @@
+package de.marhali.easyi18n.assistance.reference;
+
+import com.intellij.openapi.project.Project;
+import com.intellij.patterns.PlatformPatterns;
+import com.intellij.psi.*;
+
+
+import com.intellij.util.ProcessingContext;
+
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Java specific key reference binding.
+ * @author marhali
+ */
+public class JavaKeyReferenceContributor extends AbstractKeyReferenceContributor {
+
+    @Override
+    public void registerReferenceProviders(@NotNull PsiReferenceRegistrar registrar) {
+        registrar.registerReferenceProvider(
+                PlatformPatterns.psiElement(PsiLiteralExpression.class),
+                getProvider());
+    }
+
+    private PsiReferenceProvider getProvider() {
+        return new PsiReferenceProvider() {
+            @Override
+            public PsiReference @NotNull [] getReferencesByElement(
+                    @NotNull PsiElement element, @NotNull ProcessingContext context) {
+
+                Project project = element.getProject();
+                PsiLiteralExpression literalExpression = (PsiLiteralExpression) element;
+                String value = literalExpression.getValue() instanceof String
+                        ? (String) literalExpression.getValue()
+                        : null;
+
+                return getReferences(project, element, value);
+            }
+        };
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/reference/JsKeyReferenceContributor.java

@@ -0,0 +1,39 @@
+package de.marhali.easyi18n.assistance.reference;
+
+import com.intellij.lang.javascript.psi.JSLiteralExpression;
+import com.intellij.openapi.project.Project;
+import com.intellij.patterns.PlatformPatterns;
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.PsiReference;
+import com.intellij.psi.PsiReferenceProvider;
+import com.intellij.psi.PsiReferenceRegistrar;
+import com.intellij.util.ProcessingContext;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * JavaScript specific translation-key reference binding.
+ * @author marhali
+ */
+public class JsKeyReferenceContributor extends AbstractKeyReferenceContributor {
+    @Override
+    public void registerReferenceProviders(@NotNull PsiReferenceRegistrar registrar) {
+        registrar.registerReferenceProvider(
+                PlatformPatterns.psiElement(JSLiteralExpression.class),
+                getProvider());
+    }
+
+    private PsiReferenceProvider getProvider() {
+        return new PsiReferenceProvider() {
+            @Override
+            public PsiReference @NotNull [] getReferencesByElement(
+                    @NotNull PsiElement element, @NotNull ProcessingContext context) {
+
+                Project project = element.getProject();
+                JSLiteralExpression literalExpression = (JSLiteralExpression) element;
+                String value = literalExpression.getStringValue();
+
+                return getReferences(project, element, value);
+            }
+        };
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/reference/KtKeyReferenceContributor.java

@@ -0,0 +1,46 @@
+package de.marhali.easyi18n.assistance.reference;
+
+import com.intellij.openapi.project.Project;
+import com.intellij.patterns.PlatformPatterns;
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.PsiReference;
+import com.intellij.psi.PsiReferenceProvider;
+import com.intellij.psi.PsiReferenceRegistrar;
+import com.intellij.util.ProcessingContext;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.kotlin.psi.KtLiteralStringTemplateEntry;
+import org.jetbrains.kotlin.psi.KtStringTemplateExpression;
+
+import java.util.Arrays;
+import java.util.Optional;
+
+/**
+ * Kotlin specific translation-key reference binding.
+ * @author marhali
+ */
+public class KtKeyReferenceContributor extends AbstractKeyReferenceContributor {
+    @Override
+    public void registerReferenceProviders(@NotNull PsiReferenceRegistrar registrar) {
+        registrar.registerReferenceProvider(
+                PlatformPatterns.psiElement().inside(KtStringTemplateExpression.class),
+                getProvider());
+    }
+
+    private PsiReferenceProvider getProvider() {
+        return new PsiReferenceProvider() {
+            @Override
+            public PsiReference @NotNull [] getReferencesByElement(
+                    @NotNull PsiElement element, @NotNull ProcessingContext context) {
+
+                Optional<PsiElement> targetElement = Arrays.stream(element.getChildren()).filter(child ->
+                        child instanceof KtLiteralStringTemplateEntry).findAny();
+
+                if(targetElement.isEmpty()) {
+                    return PsiReference.EMPTY_ARRAY;
+                }
+
+                return getReferences(element.getProject(), element, targetElement.get().getText());
+            }
+        };
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/reference/PhpKeyReferenceContributor.java

@@ -0,0 +1,37 @@
+package de.marhali.easyi18n.assistance.reference;
+
+import com.intellij.openapi.project.Project;
+import com.intellij.patterns.PlatformPatterns;
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.PsiReference;
+import com.intellij.psi.PsiReferenceProvider;
+import com.intellij.psi.PsiReferenceRegistrar;
+import com.intellij.util.ProcessingContext;
+import com.jetbrains.php.lang.psi.elements.StringLiteralExpression;
+
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Php specific key reference binding
+ */
+public class PhpKeyReferenceContributor extends AbstractKeyReferenceContributor {
+    @Override
+    public void registerReferenceProviders(@NotNull PsiReferenceRegistrar registrar) {
+        registrar.registerReferenceProvider(
+                PlatformPatterns.psiElement(StringLiteralExpression.class),
+                getProvider());
+    }
+
+    private PsiReferenceProvider getProvider() {
+        return new PsiReferenceProvider() {
+            @Override
+            public PsiReference @NotNull [] getReferencesByElement(
+                    @NotNull PsiElement element, @NotNull ProcessingContext context) {
+
+                Project project = element.getProject();
+                StringLiteralExpression literalExpression = (StringLiteralExpression) element;
+                return getReferences(project, element, literalExpression.getContents());
+            }
+        };
+    }
+}

src/main/java/de/marhali/easyi18n/assistance/reference/PsiKeyReference.java

@@ -0,0 +1,72 @@
+package de.marhali.easyi18n.assistance.reference;
+
+import com.intellij.navigation.ItemPresentation;
+import com.intellij.openapi.util.TextRange;
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.PsiReferenceBase;
+import com.intellij.psi.SyntheticElement;
+import com.intellij.psi.impl.FakePsiElement;
+
+import de.marhali.easyi18n.dialog.AddDialog;
+import de.marhali.easyi18n.dialog.EditDialog;
+import de.marhali.easyi18n.model.Translation;
+import de.marhali.easyi18n.util.KeyPathConverter;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * References translation keys inside editor with corresponding {@link EditDialog} / {@link AddDialog}.
+ * @author marhali
+ */
+public class PsiKeyReference extends PsiReferenceBase<PsiElement> {
+
+    private final @NotNull Translation translation;
+    private final @NotNull KeyPathConverter converter;
+
+    protected PsiKeyReference(
+            @NotNull KeyPathConverter converter, @NotNull Translation translation, @NotNull PsiElement element) {
+
+        super(element, true);
+        this.translation = translation;
+        this.converter = converter;
+    }
+
+    public @NotNull String getKey() {
+        return converter.toString(translation.getKey());
+    }
+
+    @Override
+    public @Nullable PsiElement resolve() {
+        return new TranslationReference();
+    }
+
+    public class TranslationReference extends FakePsiElement implements SyntheticElement {
+        @Override
+        public PsiElement getParent() {
+            return myElement;
+        }
+
+        @Override
+        public void navigate(boolean requestFocus) {
+            new EditDialog(getProject(), translation).showAndHandle();
+        }
+
+        @Override
+        public String getPresentableText() {
+            return getKey();
+        }
+
+        @Override
+        public String getName() {
+            return getKey();
+        }
+
+        @Override
+        public @Nullable TextRange getTextRange() {
+            TextRange rangeInElement = getRangeInElement();
+            TextRange elementRange = myElement.getTextRange();
+            return elementRange != null ? rangeInElement.shiftRight(elementRange.getStartOffset()) : rangeInElement;
+        }
+    }
+}

src/main/java/de/marhali/easyi18n/dialog/AddDialog.java

@@ -3,112 +3,65 @@ package de.marhali.easyi18n.dialog;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.ui.DialogBuilder;
 import com.intellij.openapi.ui.DialogWrapper;
-import com.intellij.ui.components.JBLabel;
-import com.intellij.ui.components.JBScrollPane;
-import com.intellij.ui.components.JBTextField;
 
-import de.marhali.easyi18n.InstanceManager;
-import de.marhali.easyi18n.model.*;
+import de.marhali.easyi18n.model.action.TranslationCreate;
+import de.marhali.easyi18n.model.KeyPath;
+import de.marhali.easyi18n.model.Translation;
+import de.marhali.easyi18n.model.TranslationValue;
+import de.marhali.easyi18n.model.action.TranslationUpdate;
+import de.marhali.easyi18n.settings.ProjectSettingsService;
 
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import javax.swing.*;
-import javax.swing.border.EtchedBorder;
-import java.awt.*;
-import java.util.HashMap;
-import java.util.Map;
-import java.util.ResourceBundle;
 
 /**
- * Create translation dialog.
+ * Dialog to create a new translation with all associated locale values.
+ * Supports optional prefill technique for translation key or locale value.
  * @author marhali
  */
-public class AddDialog {
+public class AddDialog extends TranslationDialog {
 
-    private final @NotNull Project project;
-    private final @NotNull KeyPathConverter converter;
-
-    private @NotNull KeyPath preKey;
-
-    private JBTextField keyTextField;
-    private Map<String, JBTextField> valueTextFields;
-
-    public AddDialog(@NotNull Project project, @Nullable KeyPath preKey) {
-        this(project);
-        this.preKey = preKey == null ? new KeyPath() : preKey;
+    /**
+     * Constructs a new create dialog with prefilled fields
+     * @param project Opened project
+     * @param prefillKey Prefill translation key
+     * @param prefillLocale  Prefill preview locale value
+     */
+    public AddDialog(@NotNull Project project, @Nullable KeyPath prefillKey, @Nullable String prefillLocale) {
+        super(project, new Translation(prefillKey != null ? prefillKey : new KeyPath(),
+                        prefillLocale != null
+                                ? new TranslationValue(ProjectSettingsService.get(project).getState().getPreviewLocale(), prefillLocale)
+                                : null)
+        );
     }
 
+    /**
+     * Constructs a new create dialog without prefilled fields.
+     * @param project Opened project
+     */
     public AddDialog(@NotNull Project project) {
-        this.project = project;
-        this.converter = new KeyPathConverter(project);
-        this.preKey = new KeyPath();
+        this(project, new KeyPath(), "");
     }
 
-    public void showAndHandle() {
-        int code = prepare().show();
-
-        if(code == DialogWrapper.OK_EXIT_CODE) {
-            saveTranslation();
-        }
-    }
-
-    private void saveTranslation() {
-        Translation translation = new Translation();
-
-        valueTextFields.forEach((k, v) -> {
-            if(!v.getText().isEmpty()) {
-                translation.put(k, v.getText());
-            }
-        });
-
-        KeyedTranslation keyedTranslation = new KeyedTranslation(converter.split(keyTextField.getText()), translation);
-        TranslationCreate creation = new TranslationCreate(keyedTranslation);
-        InstanceManager.get(project).processUpdate(creation);
-    }
-
-    private DialogBuilder prepare() {
-        JPanel rootPanel = new JPanel();
-        rootPanel.setLayout(new BoxLayout(rootPanel, BoxLayout.PAGE_AXIS));
-
-        JPanel keyPanel = new JPanel(new GridLayout(0, 1, 2, 2));
-        JBLabel keyLabel = new JBLabel(ResourceBundle.getBundle("messages").getString("translation.key"));
-        keyTextField = new JBTextField(this.converter.concat(this.preKey));
-        keyLabel.setLabelFor(keyTextField);
-        keyPanel.add(keyLabel);
-        keyPanel.setBorder(BorderFactory.createEmptyBorder(0, 0, 10, 0));
-        keyPanel.add(keyTextField);
-        rootPanel.add(keyPanel);
-
-        if(!this.preKey.isEmpty()) { // Add delimiter if pre key is defined
-            keyTextField.setText(keyTextField.getText() + KeyPath.DELIMITER);
-        }
-
-        JPanel valuePanel = new JPanel(new GridLayout(0, 1, 2, 2));
-        valueTextFields = new HashMap<>();
-
-        for(String locale : InstanceManager.get(project).store().getData().getLocales()) {
-            JBLabel localeLabel = new JBLabel(locale);
-            JBTextField localeText = new JBTextField();
-            localeLabel.setLabelFor(localeText);
-
-            valuePanel.add(localeLabel);
-            valuePanel.add(localeText);
-            valueTextFields.put(locale, localeText);
-        }
-
-        JBScrollPane valuePane = new JBScrollPane(valuePanel);
-        valuePane.setBorder(BorderFactory.createTitledBorder(new EtchedBorder(),
-                ResourceBundle.getBundle("messages").getString("translation.locales")));
-        rootPanel.add(valuePane);
 
+    @Override
+    protected @NotNull DialogBuilder configure(@NotNull JComponent centerPanel) {
         DialogBuilder builder = new DialogBuilder();
-        builder.setTitle(ResourceBundle.getBundle("messages").getString("action.add"));
+        builder.setTitle(bundle.getString("action.add"));
         builder.removeAllActions();
         builder.addOkAction();
         builder.addCancelAction();
-        builder.setCenterPanel(rootPanel);
-
+        builder.setCenterPanel(centerPanel);
         return builder;
     }
+
+    @Override
+    protected @Nullable TranslationUpdate handleExit(int exitCode) {
+        if(exitCode == DialogWrapper.OK_EXIT_CODE) {
+            return new TranslationCreate(getState());
+        }
+        return null;
+    }
 }

src/main/java/de/marhali/easyi18n/dialog/EditDialog.java

@@ -3,102 +3,53 @@ package de.marhali.easyi18n.dialog;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.ui.DialogBuilder;
 import com.intellij.openapi.ui.DialogWrapper;
-import com.intellij.ui.components.JBLabel;
-import com.intellij.ui.components.JBScrollPane;
-import com.intellij.ui.components.JBTextField;
 
-import de.marhali.easyi18n.InstanceManager;
-import de.marhali.easyi18n.model.*;
 import de.marhali.easyi18n.dialog.descriptor.DeleteActionDescriptor;
+import de.marhali.easyi18n.model.action.TranslationDelete;
+import de.marhali.easyi18n.model.action.TranslationUpdate;
+import de.marhali.easyi18n.model.Translation;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 import javax.swing.*;
-import javax.swing.border.EtchedBorder;
-import java.awt.*;
-import java.util.HashMap;
-import java.util.Map;
-import java.util.ResourceBundle;
 
 /**
- * Edit translation dialog.
+ * Dialog to edit or delete an existing translation.
  * @author marhali
  */
-public class EditDialog {
+public class EditDialog extends TranslationDialog {
 
-    private final Project project;
-    private final KeyPathConverter converter;
-
-    private final KeyedTranslation origin;
-
-    private JBTextField keyTextField;
-    private Map<String, JBTextField> valueTextFields;
-
-    public EditDialog(Project project, KeyedTranslation origin) {
-        this.project = project;
-        this.converter = new KeyPathConverter(project);
-        this.origin = origin;
+    /**
+     * Constructs a new edit dialog with the provided translation
+     * @param project Opened project
+     * @param origin Translation to edit
+     */
+    public EditDialog(@NotNull Project project, @NotNull Translation origin) {
+        super(project, origin);
     }
 
-    public void showAndHandle() {
-        int code = prepare().show();
-
-        if(code == DialogWrapper.OK_EXIT_CODE) { // Edit
-            InstanceManager.get(project).processUpdate(new TranslationUpdate(origin, getChanges()));
-        } else if(code == DeleteActionDescriptor.EXIT_CODE) { // Delete
-            InstanceManager.get(project).processUpdate(new TranslationDelete(origin));
-        }
-    }
-
-    private KeyedTranslation getChanges() {
-        Translation translation = new Translation();
-
-        valueTextFields.forEach((k, v) -> {
-            if(!v.getText().isEmpty()) {
-                translation.put(k, v.getText());
-            }
-        });
-
-        return new KeyedTranslation(converter.split(keyTextField.getText()), translation);
-    }
-
-    private DialogBuilder prepare() {
-        JPanel rootPanel = new JPanel();
-        rootPanel.setLayout(new BoxLayout(rootPanel, BoxLayout.PAGE_AXIS));
-
-        JPanel keyPanel = new JPanel(new GridLayout(0, 1, 2,2));
-        JBLabel keyLabel = new JBLabel(ResourceBundle.getBundle("messages").getString("translation.key"));
-        keyTextField = new JBTextField(this.converter.concat(this.origin.getKey()));
-        keyLabel.setLabelFor(keyTextField);
-        keyPanel.add(keyLabel);
-        keyPanel.add(keyTextField);
-        keyPanel.setBorder(BorderFactory.createEmptyBorder(0, 0, 10, 0));
-        rootPanel.add(keyPanel);
-
-        JPanel valuePanel = new JPanel(new GridLayout(0, 1, 2, 2));
-        valueTextFields = new HashMap<>();
-
-        for(String locale : InstanceManager.get(project).store().getData().getLocales()) {
-            JBLabel localeLabel = new JBLabel(locale);
-            JBTextField localeText = new JBTextField(this.origin.getTranslation().get(locale));
-            localeLabel.setLabelFor(localeText);
-
-            valuePanel.add(localeLabel);
-            valuePanel.add(localeText);
-            valueTextFields.put(locale, localeText);
-        }
-
-        JBScrollPane valuePane = new JBScrollPane(valuePanel);
-        valuePane.setBorder(BorderFactory.createTitledBorder(new EtchedBorder(),
-                ResourceBundle.getBundle("messages").getString("translation.locales")));
-        rootPanel.add(valuePane);
-
+    @Override
+    protected @NotNull DialogBuilder configure(@NotNull JComponent centerPanel) {
         DialogBuilder builder = new DialogBuilder();
-        builder.setTitle(ResourceBundle.getBundle("messages").getString("action.edit"));
+        builder.setTitle(bundle.getString("action.edit"));
         builder.removeAllActions();
         builder.addCancelAction();
         builder.addActionDescriptor(new DeleteActionDescriptor());
         builder.addOkAction();
-        builder.setCenterPanel(rootPanel);
-
+        builder.setCenterPanel(centerPanel);
         return builder;
     }
+
+    @Override
+    protected @Nullable TranslationUpdate handleExit(int exitCode) {
+        switch (exitCode) {
+            case DialogWrapper.OK_EXIT_CODE:
+                return new TranslationUpdate(origin, getState());
+            case DeleteActionDescriptor.EXIT_CODE:
+                return new TranslationDelete(origin);
+            default:
+                return null;
+        }
+    }
 }

src/main/java/de/marhali/easyi18n/dialog/SettingsDialog.java

@@ -1,173 +0,0 @@
-package de.marhali.easyi18n.dialog;
-
-import com.intellij.openapi.fileChooser.FileChooserDescriptor;
-import com.intellij.openapi.project.Project;
-import com.intellij.openapi.ui.ComboBox;
-import com.intellij.openapi.ui.DialogBuilder;
-import com.intellij.openapi.ui.DialogWrapper;
-import com.intellij.openapi.ui.TextFieldWithBrowseButton;
-import com.intellij.ui.components.JBCheckBox;
-import com.intellij.ui.components.JBLabel;
-import com.intellij.ui.components.JBPanel;
-import com.intellij.ui.components.JBTextField;
-
-import de.marhali.easyi18n.InstanceManager;
-import de.marhali.easyi18n.io.parser.ArrayMapper;
-import de.marhali.easyi18n.model.FolderStrategyType;
-import de.marhali.easyi18n.model.SettingsState;
-import de.marhali.easyi18n.io.parser.ParserStrategyType;
-import de.marhali.easyi18n.service.SettingsService;
-
-import javax.swing.*;
-import java.awt.*;
-import java.awt.event.ItemEvent;
-import java.awt.event.ItemListener;
-import java.util.ResourceBundle;
-
-/**
- * Plugin configuration dialog.
- * @author marhali
- */
-public class SettingsDialog {
-
-    private final Project project;
-
-    private TextFieldWithBrowseButton pathText;
-    private ComboBox<String> folderStrategyComboBox;
-    private ComboBox<String> parserStrategyComboBox;
-    private JBTextField filePatternText;
-    private JBTextField previewLocaleText;
-    private JBTextField pathPrefixText;
-    private JBCheckBox sortKeysCheckbox;
-    private JBCheckBox nestedKeysCheckbox;
-    private JBCheckBox codeAssistanceCheckbox;
-
-    public SettingsDialog(Project project) {
-        this.project = project;
-    }
-
-    public void showAndHandle() {
-        SettingsState state = SettingsService.getInstance(project).getState();
-
-        if(prepare(state).show() == DialogWrapper.OK_EXIT_CODE) { // Save changes
-            state.setLocalesPath(pathText.getText());
-            state.setFolderStrategy(FolderStrategyType.fromIndex(folderStrategyComboBox.getSelectedIndex()));
-            state.setParserStrategy(ParserStrategyType.fromIndex(parserStrategyComboBox.getSelectedIndex()));
-            state.setFilePattern(filePatternText.getText());
-            state.setPreviewLocale(previewLocaleText.getText());
-            state.setPathPrefix(pathPrefixText.getText());
-            state.setSortKeys(sortKeysCheckbox.isSelected());
-            state.setNestedKeys(nestedKeysCheckbox.isSelected());
-            state.setCodeAssistance(codeAssistanceCheckbox.isSelected());
-
-            // Reload instance
-            InstanceManager manager = InstanceManager.get(project);
-            manager.store().loadFromPersistenceLayer((success) ->
-                    manager.bus().propagate().onUpdateData(manager.store().getData()));
-        }
-    }
-
-    private DialogBuilder prepare(SettingsState state) {
-        ResourceBundle bundle = ResourceBundle.getBundle("messages");
-        JPanel rootPanel = new JPanel(new GridLayout(0, 1, 2, 2));
-
-        /* path */
-        JBLabel pathLabel = new JBLabel(bundle.getString("settings.path.text"));
-        pathText = new TextFieldWithBrowseButton(new JTextField(state.getLocalesPath()));
-
-        pathLabel.setLabelFor(pathText);
-        pathText.addBrowseFolderListener(bundle.getString("settings.path.title"), null, project, new FileChooserDescriptor(
-                false, true, false, false, false, false));
-
-        rootPanel.add(pathLabel);
-        rootPanel.add(pathText);
-
-        JBLabel strategyLabel = new JBLabel(bundle.getString("settings.strategy.title"));
-        rootPanel.add(strategyLabel);
-
-        JPanel strategyPanel = new JBPanel<>(new GridBagLayout());
-        rootPanel.add(strategyPanel);
-        GridBagConstraints constraints = new GridBagConstraints();
-
-        /* folder strategy */
-        folderStrategyComboBox = new ComboBox<>(bundle.getString("settings.strategy.folder").split(ArrayMapper.SPLITERATOR_REGEX));
-        folderStrategyComboBox.setSelectedIndex(state.getFolderStrategy().toIndex());
-        folderStrategyComboBox.setToolTipText(bundle.getString("settings.strategy.folder.tooltip"));
-        folderStrategyComboBox.setMinimumAndPreferredWidth(256);
-        constraints.fill = GridBagConstraints.HORIZONTAL;
-        constraints.gridx = 0;
-        constraints.gridy = 0;
-        strategyPanel.add(folderStrategyComboBox, constraints);
-
-        /* parser strategy */
-        parserStrategyComboBox = new ComboBox<>(bundle.getString("settings.strategy.parser").split(ArrayMapper.SPLITERATOR_REGEX));
-        parserStrategyComboBox.setSelectedIndex(state.getParserStrategy().toIndex());
-        parserStrategyComboBox.setToolTipText(bundle.getString("settings.strategy.parser.tooltip"));
-        parserStrategyComboBox.addItemListener(handleParserChange());
-        constraints.fill = GridBagConstraints.HORIZONTAL;
-        constraints.gridx = 1;
-        constraints.gridy = 0;
-        strategyPanel.add(parserStrategyComboBox, constraints);
-
-        /* file pattern strategy */
-        filePatternText = new JBTextField(state.getFilePattern());
-        filePatternText.setToolTipText(bundle.getString("settings.strategy.file-pattern.tooltip"));
-        constraints.fill = GridBagConstraints.HORIZONTAL;
-        constraints.gridx = 2;
-        constraints.gridy = 0;
-        constraints.weightx = 1;
-        strategyPanel.add(filePatternText, constraints);
-
-        /* preview locale */
-        JBLabel previewLocaleLabel = new JBLabel(bundle.getString("settings.preview"));
-        previewLocaleText = new JBTextField(state.getPreviewLocale());
-        previewLocaleLabel.setLabelFor(previewLocaleText);
-
-        rootPanel.add(previewLocaleLabel);
-        rootPanel.add(previewLocaleText);
-
-        /* path prefix */
-        JBLabel pathPrefixLabel = new JBLabel(bundle.getString("settings.path.prefix"));
-        pathPrefixText = new JBTextField(state.getPathPrefix());
-
-        rootPanel.add(pathPrefixLabel);
-        rootPanel.add(pathPrefixText);
-
-        /* sort keys */
-        sortKeysCheckbox = new JBCheckBox(bundle.getString("settings.keys.sort"));
-        sortKeysCheckbox.setSelected(state.isSortKeys());
-
-        rootPanel.add(sortKeysCheckbox);
-
-        /* nested keys */
-        nestedKeysCheckbox = new JBCheckBox(bundle.getString("settings.keys.nested"));
-        nestedKeysCheckbox.setSelected(state.isNestedKeys());
-
-        rootPanel.add(nestedKeysCheckbox);
-
-        /* code assistance */
-        codeAssistanceCheckbox = new JBCheckBox(bundle.getString("settings.editor.assistance"));
-        codeAssistanceCheckbox.setSelected(state.isCodeAssistance());
-
-        rootPanel.add(codeAssistanceCheckbox);
-
-        DialogBuilder builder = new DialogBuilder();
-        builder.setTitle(bundle.getString("action.settings"));
-        builder.removeAllActions();
-        builder.addCancelAction();
-        builder.addOkAction();
-        builder.setCenterPanel(rootPanel);
-
-        return builder;
-    }
-
-    private ItemListener handleParserChange() {
-        return e -> {
-          if(e.getStateChange() == ItemEvent.SELECTED) {
-              // Automatically suggest file pattern option on parser change
-              ParserStrategyType newStrategy = ParserStrategyType.fromIndex(parserStrategyComboBox.getSelectedIndex());
-              filePatternText.setText(newStrategy.getExampleFilePattern());
-          }
-        };
-    }
-}

src/main/java/de/marhali/easyi18n/dialog/TranslationDialog.java

@@ -0,0 +1,148 @@
+package de.marhali.easyi18n.dialog;
+
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.ui.DialogBuilder;
+import com.intellij.ui.components.JBScrollPane;
+import com.intellij.ui.components.JBTextField;
+import com.intellij.util.Consumer;
+import com.intellij.util.ui.FormBuilder;
+
+import de.marhali.easyi18n.InstanceManager;
+import de.marhali.easyi18n.model.KeyPath;
+import de.marhali.easyi18n.model.Translation;
+import de.marhali.easyi18n.model.TranslationValue;
+import de.marhali.easyi18n.model.action.TranslationUpdate;
+import de.marhali.easyi18n.settings.ProjectSettings;
+import de.marhali.easyi18n.settings.ProjectSettingsService;
+import de.marhali.easyi18n.util.KeyPathConverter;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import javax.swing.*;
+import javax.swing.border.EtchedBorder;
+import java.awt.*;
+import java.util.*;
+
+/**
+ * Base for add and edit translation dialogs.
+ * @author marhali
+ */
+abstract class TranslationDialog {
+
+    protected static final ResourceBundle bundle = ResourceBundle.getBundle("messages");
+
+    protected final @NotNull Project project;
+    protected final @NotNull ProjectSettings settings;
+    protected final @NotNull KeyPathConverter converter;
+    protected final @NotNull Translation origin;
+
+    protected final JTextField keyField;
+    protected final Map<String, JTextField> localeValueFields;
+
+    private final Set<Consumer<TranslationUpdate>> callbacks;
+
+    /**
+     * Constructs a new translation dialog.
+     * @param project Opened project
+     * @param origin Prefill translation
+     */
+    protected TranslationDialog(@NotNull Project project, @NotNull Translation origin) {
+        this.project = project;
+        this.settings = ProjectSettingsService.get(project).getState();
+        this.converter = new KeyPathConverter(settings);
+        this.origin = origin;
+
+        this.callbacks = new HashSet<>();
+
+        // Fields
+        TranslationValue value = origin.getValue();
+
+        this.keyField = new JBTextField(converter.toString(origin.getKey()));
+        this.localeValueFields = new HashMap<>();
+
+        for(String locale : InstanceManager.get(project).store().getData().getLocales()) {
+            localeValueFields.put(locale, new JBTextField(value != null ? value.get(locale) : null));
+        }
+    }
+
+    /**
+     * Registers a callback that is called on dialog close with the final state.
+     * If the user aborts the dialog no callback is called.
+     * @param callback Callback to register
+     */
+    public void registerCallback(Consumer<TranslationUpdate> callback) {
+        callbacks.add(callback);
+    }
+
+    /**
+     * Implementation needs to configure the dialog. E.g. title, actions, ...
+     * The implementation needs to set the provided centerPanel as the view panel.
+     * @param centerPanel GUI to set on the dialog builder
+     * @return configured dialog builder
+     */
+    protected abstract @NotNull DialogBuilder configure(@NotNull JComponent centerPanel);
+
+    /**
+     * Implementation needs to handle exit
+     * @param exitCode See {@link com.intellij.openapi.ui.DialogWrapper} for exit codes
+     * @return update conclusion, null if aborted
+     */
+    protected abstract @Nullable TranslationUpdate handleExit(int exitCode);
+
+    /**
+     * Opens the translation modal and applies the appropriate logic on modal close.
+     * Internally, the {@link #handleExit(int)} method will be called to determine finalization logic.
+     */
+    public void showAndHandle() {
+        int exitCode = createDialog().show();
+        TranslationUpdate update = handleExit(exitCode);
+
+        if(update != null) {
+            InstanceManager.get(project).processUpdate(update);
+            callbacks.forEach(callback -> callback.consume(update));
+        }
+    }
+
+    /**
+     * Retrieve current modal state.
+     * @return Translation
+     */
+    protected @NotNull Translation getState() {
+        KeyPath key = converter.fromString(keyField.getText());
+
+        TranslationValue value = new TranslationValue();
+
+        for(Map.Entry<String, JTextField> entry : localeValueFields.entrySet()) {
+            value.put(entry.getKey(), entry.getValue().getText());
+        }
+
+        return new Translation(key, value);
+    }
+
+    private DialogBuilder createDialog() {
+        JPanel panel = FormBuilder.createFormBuilder()
+                .addLabeledComponent(bundle.getString("translation.key"), keyField, true)
+                .addComponent(createLocalesPanel(), 12)
+                .getPanel();
+
+        panel.setMinimumSize(new Dimension(200, 150));
+
+        return configure(panel);
+    }
+
+    private JComponent createLocalesPanel() {
+        FormBuilder builder = FormBuilder.createFormBuilder();
+
+        for(Map.Entry<String, JTextField> localeEntry : localeValueFields.entrySet()) {
+            builder.addLabeledComponent(localeEntry.getKey(), localeEntry.getValue(), 6, true);
+        }
+
+        JScrollPane scrollPane = new JBScrollPane(builder.getPanel());
+
+        scrollPane.setBorder(BorderFactory.createTitledBorder(
+                new EtchedBorder(), bundle.getString("translation.locales")));
+
+        return scrollPane;
+    }
+}

src/main/java/de/marhali/easyi18n/editor/KeyAnnotator.java

@@ -1,59 +0,0 @@
-package de.marhali.easyi18n.editor;
-
-import com.intellij.lang.annotation.AnnotationHolder;
-import com.intellij.lang.annotation.HighlightSeverity;
-import com.intellij.openapi.project.Project;
-
-import de.marhali.easyi18n.InstanceManager;
-import de.marhali.easyi18n.model.KeyPath;
-import de.marhali.easyi18n.model.KeyPathConverter;
-import de.marhali.easyi18n.model.SettingsState;
-import de.marhali.easyi18n.model.TranslationNode;
-import de.marhali.easyi18n.service.SettingsService;
-
-import org.jetbrains.annotations.NotNull;
-
-/**
- * Superclass for managing key annotations.
- * @author marhali
- */
-public class KeyAnnotator {
-
-    /**
-     * Adds annotations for i18n keys with content preview for preferred locale.
-     * @param key I18n key extracted by psi element
-     * @param project Project instance
-     * @param holder Annotation holder
-     */
-    protected void annotate(@NotNull String key, @NotNull Project project, @NotNull AnnotationHolder holder) {
-        // Do not annotate keys if service is disabled
-        if(!SettingsService.getInstance(project).getState().isCodeAssistance()) {
-            return;
-        }
-
-        SettingsState state = SettingsService.getInstance(project).getState();
-        String pathPrefix = state.getPathPrefix();
-        String previewLocale = state.getPreviewLocale();
-
-        KeyPathConverter converter = new KeyPathConverter(project);
-
-        String searchKey = key.length() >= pathPrefix.length()
-                ? key.substring(pathPrefix.length())
-                : key;
-
-        if(searchKey.startsWith(KeyPath.DELIMITER)) {
-            searchKey = searchKey.substring(KeyPath.DELIMITER.length());
-        }
-
-        TranslationNode node = InstanceManager.get(project).store().getData().getNode(converter.split(searchKey));
-
-        if(node == null) { // Unknown translation. Just ignore it
-            return;
-        }
-
-        String tooltip = node.isLeaf() ? "I18n(" + previewLocale + ": " + node.getValue().get(previewLocale) + ")"
-                : "I18n ([])";
-
-        holder.newAnnotation(HighlightSeverity.INFORMATION, tooltip).create();
-    }
-}

src/main/java/de/marhali/easyi18n/editor/KeyCompletionProvider.java

@@ -1,62 +0,0 @@
-package de.marhali.easyi18n.editor;
-
-import com.intellij.codeInsight.completion.*;
-import com.intellij.codeInsight.lookup.*;
-import com.intellij.icons.AllIcons;
-import com.intellij.openapi.project.*;
-import com.intellij.util.*;
-
-import de.marhali.easyi18n.DataStore;
-import de.marhali.easyi18n.InstanceManager;
-import de.marhali.easyi18n.model.KeyPath;
-import de.marhali.easyi18n.model.Translation;
-import de.marhali.easyi18n.service.*;
-
-import org.jetbrains.annotations.*;
-
-import java.util.*;
-
-/**
- * I18n translation key completion provider.
- * @author marhali
- */
-public class KeyCompletionProvider extends CompletionProvider<CompletionParameters> {
-
-    @Override
-    protected void addCompletions(@NotNull CompletionParameters parameters,
-                                  @NotNull ProcessingContext context, @NotNull CompletionResultSet result) {
-
-        Project project = parameters.getOriginalFile().getProject();
-
-        // Do not annotate keys if service is disabled
-        if(!SettingsService.getInstance(project).getState().isCodeAssistance()) {
-            return;
-        }
-
-        DataStore store = InstanceManager.get(project).store();
-
-        String previewLocale = SettingsService.getInstance(project).getState().getPreviewLocale();
-        String pathPrefix = SettingsService.getInstance(project).getState().getPathPrefix();
-
-        if(pathPrefix.length() > 0 && !pathPrefix.endsWith(KeyPath.DELIMITER)) {
-            pathPrefix += KeyPath.DELIMITER;
-        }
-
-        Set<KeyPath> fullKeys = store.getData().getFullKeys();
-
-        for(KeyPath currentKey :  fullKeys) {
-            result.addElement(createElement(
-                    pathPrefix,
-                    currentKey,
-                    previewLocale,
-                    Objects.requireNonNull(store.getData().getTranslation(currentKey))
-            ));
-        }
-    }
-
-    private LookupElement createElement(String prefix, KeyPath path, String locale, Translation translation) {
-        return LookupElementBuilder.create(prefix + path.toSimpleString())
-                .withIcon(AllIcons.Actions.PreserveCaseHover)
-                .appendTailText(" I18n(" + locale + ": " + translation.get(locale) + ")", true);
-    }
-}

src/main/java/de/marhali/easyi18n/editor/KeyReference.java

@@ -1,93 +0,0 @@
-package de.marhali.easyi18n.editor;
-
-import com.intellij.openapi.util.TextRange;
-import com.intellij.psi.*;
-import com.intellij.psi.impl.FakePsiElement;
-
-import de.marhali.easyi18n.InstanceManager;
-import de.marhali.easyi18n.dialog.AddDialog;
-import de.marhali.easyi18n.dialog.EditDialog;
-import de.marhali.easyi18n.model.KeyPath;
-import de.marhali.easyi18n.model.KeyPathConverter;
-import de.marhali.easyi18n.model.KeyedTranslation;
-import de.marhali.easyi18n.model.Translation;
-
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
-
-/**
- * Go to declaration reference for i18n keys.
- * @author marhali
- */
-public class KeyReference extends PsiReferenceBase<PsiElement> {
-
-    @Nullable private final String myKey;
-
-    public KeyReference(@NotNull final PsiElement element) {
-        this(element, (String)null);
-    }
-
-    public KeyReference(@NotNull final PsiElement element, @Nullable final String myKey) {
-        super(element, true);
-        this.myKey = myKey;
-    }
-
-    public KeyReference(@NotNull final PsiElement element, @NotNull TextRange textRange) {
-        this(element, textRange, null);
-    }
-
-    public KeyReference(@NotNull PsiElement element, TextRange textRange, @Nullable String myKey) {
-        super(element, textRange, true);
-        this.myKey = myKey;
-    }
-
-    @Override
-    public @Nullable PsiElement resolve() {
-        return new TranslationKey();
-    }
-
-    public String getKey() {
-        return myKey != null ? myKey : getValue();
-    }
-
-    class TranslationKey extends FakePsiElement implements SyntheticElement {
-        @Override
-        public PsiElement getParent() {
-            return myElement;
-        }
-
-        @Override
-        public void navigate(boolean requestFocus) {
-            KeyPathConverter converter = new KeyPathConverter(getProject());
-            KeyPath path = converter.split(getKey());
-            Translation translation = InstanceManager.get(getProject()).store().getData().getTranslation(path);
-
-            if(translation != null) {
-                new EditDialog(getProject(), new KeyedTranslation(path, translation)).showAndHandle();
-            } else {
-                new AddDialog(getProject(), path).showAndHandle();
-            }
-        }
-
-        @Override
-        public String getPresentableText() {
-            return getKey();
-        }
-
-        @Override
-        public String getName() {
-            return getKey();
-        }
-
-        @Override
-        public @Nullable TextRange getTextRange() {
-            final TextRange rangeInElement = getRangeInElement();
-            final TextRange elementRange = myElement.getTextRange();
-            return elementRange != null ? rangeInElement.shiftRight(elementRange.getStartOffset()) : rangeInElement;
-        }
-    }
-
-    public static boolean isReferencable(String value) {
-        return value.matches("^[^\\s:/]+$");
-    }
-}

src/main/java/de/marhali/easyi18n/editor/generic/GenericFoldingBuilder.java

@@ -1,87 +0,0 @@
-package de.marhali.easyi18n.editor.generic;
-
-import com.intellij.lang.ASTNode;
-import com.intellij.lang.folding.FoldingBuilderEx;
-import com.intellij.lang.folding.FoldingDescriptor;
-import com.intellij.openapi.editor.Document;
-import com.intellij.openapi.util.TextRange;
-import com.intellij.psi.PsiElement;
-import com.intellij.psi.PsiLiteralValue;
-import com.intellij.psi.util.PsiTreeUtil;
-
-import de.marhali.easyi18n.DataStore;
-import de.marhali.easyi18n.InstanceManager;
-import de.marhali.easyi18n.model.KeyPathConverter;
-import de.marhali.easyi18n.model.Translation;
-import de.marhali.easyi18n.service.SettingsService;
-
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
-
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.List;
-
-/**
- * Translation key folding with actual value based on i18n instance.
- * @author marhali
- */
-public class GenericFoldingBuilder extends FoldingBuilderEx {
-
-    @Override
-    public FoldingDescriptor @NotNull [] buildFoldRegions(@NotNull PsiElement root, @NotNull Document document, boolean quick) {
-        Collection<PsiLiteralValue> literalValues = PsiTreeUtil.findChildrenOfType(root, PsiLiteralValue.class);
-        List<FoldingDescriptor> descriptors = new ArrayList<>();
-
-        if(!SettingsService.getInstance(root.getProject()).getState().isCodeAssistance()) {
-            return FoldingDescriptor.EMPTY;
-        }
-
-        DataStore store = InstanceManager.get(root.getProject()).store();
-        KeyPathConverter converter = new KeyPathConverter(root.getProject());
-
-        for(final PsiLiteralValue literalValue : literalValues) {
-            String value = literalValue.getValue() instanceof String ? (String) literalValue.getValue() : null;
-
-            // Undefined string literal or not a translation
-            if(value == null || store.getData().getTranslation(converter.split(value)) == null) {
-                continue;
-            }
-
-            descriptors.add(new FoldingDescriptor(literalValue.getNode(),
-                    new TextRange(literalValue.getTextRange().getStartOffset() + 1,
-                            literalValue.getTextRange().getEndOffset() - 1)));
-        }
-
-        return descriptors.toArray(new FoldingDescriptor[0]);
-    }
-
-    @Nullable
-    @Override
-    public String getPlaceholderText(@NotNull ASTNode node) {
-        PsiLiteralValue literalValue = node.getPsi(PsiLiteralValue.class);
-        String value = literalValue.getValue() instanceof String ? (String) literalValue.getValue() : null;
-
-        if(value == null) {
-            return null;
-        }
-
-        DataStore store = InstanceManager.get(literalValue.getProject()).store();
-        KeyPathConverter converter = new KeyPathConverter(literalValue.getProject());
-
-        Translation translation = store.getData().getTranslation(converter.split(value));
-
-        if(translation == null) {
-            return null;
-        }
-
-        String previewLocale = SettingsService.getInstance(literalValue.getProject()).getState().getPreviewLocale();
-
-        return translation.get(previewLocale);
-    }
-
-    @Override
-    public boolean isCollapsedByDefault(@NotNull ASTNode node) {
-        return true;
-    }
-}

src/main/java/de/marhali/easyi18n/editor/generic/GenericKeyAnnotator.java

@@ -1,33 +0,0 @@
-package de.marhali.easyi18n.editor.generic;
-
-import com.intellij.lang.annotation.AnnotationHolder;
-import com.intellij.lang.annotation.Annotator;
-import com.intellij.psi.PsiElement;
-import com.intellij.psi.PsiLiteralValue;
-
-import de.marhali.easyi18n.editor.KeyAnnotator;
-
-import org.jetbrains.annotations.NotNull;
-
-/**
- * Translation key annotator for generic languages which support {@link PsiLiteralValue}.
- * @author marhali
- */
-public class GenericKeyAnnotator extends KeyAnnotator implements Annotator {
-
-    @Override
-    public void annotate(@NotNull PsiElement element, @NotNull AnnotationHolder holder) {
-        if(!(element instanceof PsiLiteralValue)) {
-            return;
-        }
-
-        PsiLiteralValue literalValue = (PsiLiteralValue) element;
-        String value = literalValue.getValue() instanceof String ? (String) literalValue.getValue() : null;
-
-        if(value == null) {
-            return;
-        }
-
-        annotate(value, element.getProject(), holder);
-    }
-}

src/main/java/de/marhali/easyi18n/editor/generic/GenericKeyCompletionContributor.java

@@ -1,24 +0,0 @@
-package de.marhali.easyi18n.editor.generic;
-
-import com.intellij.codeInsight.completion.CompletionContributor;
-import com.intellij.codeInsight.completion.CompletionType;
-import com.intellij.patterns.*;
-import com.intellij.psi.*;
-import com.intellij.psi.xml.*;
-import de.marhali.easyi18n.editor.KeyCompletionProvider;
-
-/**
- * Translation key completion for generic languages which support {@link PsiLiteralValue}.
- * @author marhali
- */
-public class GenericKeyCompletionContributor extends CompletionContributor {
-
-    public GenericKeyCompletionContributor() {
-        extend(CompletionType.BASIC, PlatformPatterns.psiElement(PlainTextTokenTypes.PLAIN_TEXT),
-                new KeyCompletionProvider());
-        extend(CompletionType.BASIC, PlatformPatterns.psiElement().inside(XmlElement.class),
-                new KeyCompletionProvider());
-        extend(CompletionType.BASIC, PlatformPatterns.psiElement().inside(PsiLiteralValue.class),
-                new KeyCompletionProvider());
-    }
-}

src/main/java/de/marhali/easyi18n/editor/generic/GenericKeyReferenceContributor.java

@@ -1,54 +0,0 @@
-package de.marhali.easyi18n.editor.generic;
-
-import com.intellij.patterns.PlatformPatterns;
-import com.intellij.psi.*;
-import com.intellij.util.ProcessingContext;
-
-import de.marhali.easyi18n.InstanceManager;
-import de.marhali.easyi18n.editor.KeyReference;
-import de.marhali.easyi18n.model.KeyPathConverter;
-import de.marhali.easyi18n.service.SettingsService;
-
-import org.jetbrains.annotations.NotNull;
-
-/**
- * Generic translation key reference contributor.
- * @author marhali
- */
-public class GenericKeyReferenceContributor extends PsiReferenceContributor {
-    @Override
-    public void registerReferenceProviders(@NotNull PsiReferenceRegistrar registrar) {
-        registrar.registerReferenceProvider(PlatformPatterns.psiElement(PsiLiteralValue.class), getProvider());
-    }
-
-    private PsiReferenceProvider getProvider() {
-        return new PsiReferenceProvider() {
-            @Override
-            public PsiReference @NotNull [] getReferencesByElement(
-                    @NotNull PsiElement element, @NotNull ProcessingContext context) {
-
-                PsiLiteralValue literalValue = (PsiLiteralValue) element;
-                String value = literalValue.getValue() instanceof String ? (String) literalValue.getValue() : null;
-
-                if(value == null) {
-                    return PsiReference.EMPTY_ARRAY;
-                }
-
-                // Do not reference keys if service is disabled
-                if(!SettingsService.getInstance(element.getProject()).getState().isCodeAssistance()) {
-                    return PsiReference.EMPTY_ARRAY;
-                }
-
-                KeyPathConverter converter = new KeyPathConverter(element.getProject());
-
-                if(InstanceManager.get(element.getProject()).store().getData().getTranslation(converter.split(value)) == null) {
-                    if(!KeyReference.isReferencable(value)) { // Creation policy
-                        return PsiReference.EMPTY_ARRAY;
-                    }
-                }
-
-                return new PsiReference[] { new KeyReference(element, value) };
-            }
-        };
-    }
-}

src/main/java/de/marhali/easyi18n/editor/kotlin/KotlinKeyAnnotator.java

@@ -1,31 +0,0 @@
-package de.marhali.easyi18n.editor.kotlin;
-
-import com.intellij.lang.annotation.AnnotationHolder;
-import com.intellij.lang.annotation.Annotator;
-import com.intellij.psi.PsiElement;
-
-import de.marhali.easyi18n.editor.KeyAnnotator;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.kotlin.psi.KtLiteralStringTemplateEntry;
-
-/**
- * Kotlin specific translation key annotator
- * @author marhali
- */
-public class KotlinKeyAnnotator extends KeyAnnotator implements Annotator {
-
-    @Override
-    public void annotate(@NotNull PsiElement element, @NotNull AnnotationHolder holder) {
-        if(!(element instanceof KtLiteralStringTemplateEntry)) {
-            return;
-        }
-
-        String value = element.getText();
-
-        if(value == null) {
-            return;
-        }
-
-        annotate(value, element.getProject(), holder);
-    }
-}

src/main/java/de/marhali/easyi18n/editor/kotlin/KotlinKeyReferenceContributor.java

@@ -1,59 +0,0 @@
-package de.marhali.easyi18n.editor.kotlin;
-
-import com.intellij.patterns.PlatformPatterns;
-import com.intellij.psi.*;
-
-import com.intellij.util.ProcessingContext;
-
-import de.marhali.easyi18n.InstanceManager;
-import de.marhali.easyi18n.editor.KeyReference;
-import de.marhali.easyi18n.model.KeyPathConverter;
-import de.marhali.easyi18n.service.SettingsService;
-
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.kotlin.psi.KtLiteralStringTemplateEntry;
-import org.jetbrains.kotlin.psi.KtStringTemplateExpression;
-
-/**
- * Kotlin translation key reference contributor.
- * @author marhali
- */
-public class KotlinKeyReferenceContributor extends PsiReferenceContributor {
-
-    @Override
-    public void registerReferenceProviders(@NotNull PsiReferenceRegistrar registrar) {
-        registrar.registerReferenceProvider(PlatformPatterns.psiElement().inside(KtStringTemplateExpression.class), getProvider());
-    }
-
-    private PsiReferenceProvider getProvider() {
-        return new PsiReferenceProvider() {
-            @Override
-            public PsiReference @NotNull [] getReferencesByElement(@NotNull PsiElement element, @NotNull ProcessingContext context) {
-                String value = null;
-
-                for (PsiElement child : element.getChildren()) {
-                    if(child instanceof KtLiteralStringTemplateEntry) {
-                        value = child.getText();
-                    }
-                }
-
-                if(value == null) {
-                    return PsiReference.EMPTY_ARRAY;
-                }
-
-                // Do not reference keys if service is disabled
-                if(!SettingsService.getInstance(element.getProject()).getState().isCodeAssistance()) {
-                    return PsiReference.EMPTY_ARRAY;
-                }
-
-                KeyPathConverter converter = new KeyPathConverter(element.getProject());
-
-                if(InstanceManager.get(element.getProject()).store().getData().getNode(converter.split(value)) == null) {
-                    return PsiReference.EMPTY_ARRAY;
-                }
-
-                return new PsiReference[] { new KeyReference(element, value) };
-            }
-        };
-    }
-}

src/main/java/de/marhali/easyi18n/io/IOHandler.java

@@ -9,6 +9,7 @@ import de.marhali.easyi18n.io.parser.ParserStrategy;
 import de.marhali.easyi18n.io.parser.ParserStrategyType;
 import de.marhali.easyi18n.model.*;
 
+import de.marhali.easyi18n.settings.ProjectSettings;
 import org.jetbrains.annotations.NotNull;
 
 import java.io.File;
@@ -21,23 +22,23 @@ import java.util.List;
  */
 public class IOHandler {
 
-    private final @NotNull SettingsState settings;
+    private final @NotNull ProjectSettings settings;
 
     private final @NotNull FolderStrategy folderStrategy;
 
     private final @NotNull ParserStrategyType parserStrategyType;
     private final @NotNull ParserStrategy parserStrategy;
 
-    public IOHandler(@NotNull SettingsState settings) throws Exception {
+    public IOHandler(@NotNull ProjectSettings settings) throws Exception {
 
         this.settings = settings;
 
         this.folderStrategy = settings.getFolderStrategy().getStrategy()
-                .getDeclaredConstructor(SettingsState.class).newInstance(settings);
+                .getDeclaredConstructor(ProjectSettings.class).newInstance(settings);
 
         this.parserStrategyType = settings.getParserStrategy();
         this.parserStrategy = parserStrategyType.getStrategy()
-                .getDeclaredConstructor(SettingsState.class).newInstance(settings);
+                .getDeclaredConstructor(ProjectSettings.class).newInstance(settings);
     }
 
     /**
@@ -47,7 +48,7 @@ public class IOHandler {
      * @throws IOException Could not read translation data
      */
     public @NotNull TranslationData read() throws IOException {
-        String localesPath = this.settings.getLocalesPath();
+        String localesPath = this.settings.getLocalesDirectory();
 
         if(localesPath == null || localesPath.isEmpty()) {
             throw new EmptyLocalesDirException("Locales path must not be empty");
@@ -59,7 +60,7 @@ public class IOHandler {
             throw new IllegalArgumentException("Specified locales path is invalid (" + localesPath + ")");
         }
 
-        TranslationData data = new TranslationData(this.settings.isSortKeys());
+        TranslationData data = new TranslationData(this.settings.isSorting());
         List<TranslationFile> translationFiles = this.folderStrategy.analyzeFolderStructure(localesDirectory);
 
         for(TranslationFile file : translationFiles) {
@@ -80,7 +81,7 @@ public class IOHandler {
      * @throws IOException Write action failed
      */
     public void write(@NotNull TranslationData data) throws IOException {
-        String localesPath = this.settings.getLocalesPath();
+        String localesPath = this.settings.getLocalesDirectory();
 
         if(localesPath == null || localesPath.isEmpty()) {
             throw new EmptyLocalesDirException("Locales path must not be empty");

src/main/java/de/marhali/easyi18n/io/folder/FolderStrategy.java

@@ -4,10 +4,10 @@ import com.intellij.openapi.vfs.LocalFileSystem;
 import com.intellij.openapi.vfs.VirtualFile;
 
 import de.marhali.easyi18n.io.parser.ParserStrategyType;
-import de.marhali.easyi18n.model.SettingsState;
 import de.marhali.easyi18n.model.TranslationData;
 import de.marhali.easyi18n.model.TranslationFile;
 
+import de.marhali.easyi18n.settings.ProjectSettings;
 import org.apache.commons.io.FilenameUtils;
 import org.jetbrains.annotations.NotNull;
 
@@ -22,9 +22,9 @@ import java.util.Objects;
  */
 public abstract class FolderStrategy {
 
-    protected final @NotNull SettingsState settings;
+    protected final @NotNull ProjectSettings settings;
 
-    public FolderStrategy(@NotNull SettingsState settings) {
+    public FolderStrategy(@NotNull ProjectSettings settings) {
         this.settings = settings;
     }
 

src/main/java/de/marhali/easyi18n/io/folder/FolderStrategyType.java

@@ -1,23 +1,24 @@
-package de.marhali.easyi18n.model;
-
-import de.marhali.easyi18n.io.folder.FolderStrategy;
-import de.marhali.easyi18n.io.folder.ModularLocaleFolderStrategy;
-import de.marhali.easyi18n.io.folder.ModularNamespaceFolderStrategy;
-import de.marhali.easyi18n.io.folder.SingleFolderStrategy;
+package de.marhali.easyi18n.io.folder;
 
 /**
  * Represents all supported folder strategies.
  * @author marhali
  */
 public enum FolderStrategyType {
-    SINGLE(SingleFolderStrategy.class),
-    MODULARIZED_LOCALE(ModularLocaleFolderStrategy.class),
-    MODULARIZED_NAMESPACE(ModularNamespaceFolderStrategy.class);
+    SINGLE(SingleFolderStrategy.class, false),
+    MODULARIZED_LOCALE(ModularLocaleFolderStrategy.class, true),
+    MODULARIZED_NAMESPACE(ModularNamespaceFolderStrategy.class, true);
 
     private final Class<? extends FolderStrategy> strategy;
+    private final boolean namespaceMode;
 
-    FolderStrategyType(Class<? extends FolderStrategy> strategy) {
+    /**
+     * @param strategy Strategy implementation
+     * @param namespaceMode Does this strategy use namespaces?
+     */
+    FolderStrategyType(Class<? extends FolderStrategy> strategy, boolean namespaceMode) {
         this.strategy = strategy;
+        this.namespaceMode = namespaceMode;
     }
 
     public Class<? extends FolderStrategy> getStrategy() {
@@ -38,6 +39,10 @@ public enum FolderStrategyType {
         throw new NullPointerException();
     }
 
+    public boolean isNamespaceMode() {
+        return namespaceMode;
+    }
+
     public static FolderStrategyType fromIndex(int index) {
         return values()[index];
     }

src/main/java/de/marhali/easyi18n/io/folder/ModularLocaleFolderStrategy.java

@@ -3,9 +3,9 @@ package de.marhali.easyi18n.io.folder;
 import com.intellij.openapi.vfs.VirtualFile;
 
 import de.marhali.easyi18n.io.parser.ParserStrategyType;
-import de.marhali.easyi18n.model.SettingsState;
 import de.marhali.easyi18n.model.TranslationData;
 import de.marhali.easyi18n.model.TranslationFile;
+import de.marhali.easyi18n.settings.ProjectSettings;
 
 import org.jetbrains.annotations.NotNull;
 
@@ -20,7 +20,7 @@ import java.util.List;
  */
 public class ModularLocaleFolderStrategy extends FolderStrategy {
 
-    public ModularLocaleFolderStrategy(@NotNull SettingsState settings) {
+    public ModularLocaleFolderStrategy(@NotNull ProjectSettings settings) {
         super(settings);
     }
 

src/main/java/de/marhali/easyi18n/io/folder/ModularNamespaceFolderStrategy.java

@@ -3,9 +3,9 @@ package de.marhali.easyi18n.io.folder;
 import com.intellij.openapi.vfs.VirtualFile;
 
 import de.marhali.easyi18n.io.parser.ParserStrategyType;
-import de.marhali.easyi18n.model.SettingsState;
 import de.marhali.easyi18n.model.TranslationData;
 import de.marhali.easyi18n.model.TranslationFile;
+import de.marhali.easyi18n.settings.ProjectSettings;
 
 import org.jetbrains.annotations.NotNull;
 
@@ -20,7 +20,7 @@ import java.util.List;
  */
 public class ModularNamespaceFolderStrategy extends FolderStrategy {
 
-    public ModularNamespaceFolderStrategy(@NotNull SettingsState settings) {
+    public ModularNamespaceFolderStrategy(@NotNull ProjectSettings settings) {
         super(settings);
     }
 

src/main/java/de/marhali/easyi18n/io/folder/SingleFolderStrategy.java

@@ -3,9 +3,9 @@ package de.marhali.easyi18n.io.folder;
 import com.intellij.openapi.vfs.VirtualFile;
 
 import de.marhali.easyi18n.io.parser.ParserStrategyType;
-import de.marhali.easyi18n.model.SettingsState;
 import de.marhali.easyi18n.model.TranslationData;
 import de.marhali.easyi18n.model.TranslationFile;
+import de.marhali.easyi18n.settings.ProjectSettings;
 
 import org.jetbrains.annotations.NotNull;
 
@@ -22,7 +22,7 @@ import java.util.List;
  */
 public class SingleFolderStrategy extends FolderStrategy {
 
-    public SingleFolderStrategy(@NotNull SettingsState settings) {
+    public SingleFolderStrategy(@NotNull ProjectSettings settings) {
         super(settings);
     }
 

src/main/java/de/marhali/easyi18n/io/parser/ParserStrategy.java

@@ -2,6 +2,8 @@ package de.marhali.easyi18n.io.parser;
 
 import de.marhali.easyi18n.model.*;
 
+import de.marhali.easyi18n.model.KeyPath;
+import de.marhali.easyi18n.settings.ProjectSettings;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.Objects;
@@ -12,9 +14,9 @@ import java.util.Objects;
  */
 public abstract class ParserStrategy {
 
-    protected final @NotNull SettingsState settings;
+    protected final @NotNull ProjectSettings settings;
 
-    public ParserStrategy(@NotNull SettingsState settings) {
+    public ParserStrategy(@NotNull ProjectSettings settings) {
         this.settings = settings;
     }
 
@@ -45,10 +47,10 @@ public abstract class ParserStrategy {
 
         if(file.getNamespace() != null) {
             String moduleName = file.getNamespace();
-            TranslationNode moduleNode = data.getNode(KeyPath.of(moduleName));
+            TranslationNode moduleNode = data.getNode(new KeyPath(moduleName));
 
             if(moduleNode == null) {
-                moduleNode = new TranslationNode(this.settings.isSortKeys());
+                moduleNode = new TranslationNode(this.settings.isSorting());
                 data.getRootNode().setChildren(moduleName, moduleNode);
             }
 
@@ -68,7 +70,7 @@ public abstract class ParserStrategy {
         TranslationNode targetNode = data.getRootNode();
 
         if(file.getNamespace() != null) {
-            targetNode = data.getNode(KeyPath.of(file.getNamespace()));
+            targetNode = data.getNode(new KeyPath(file.getNamespace()));
         }
 
         return Objects.requireNonNull(targetNode);

src/main/java/de/marhali/easyi18n/io/parser/json/JsonMapper.java

@@ -4,8 +4,8 @@ import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonPrimitive;
 
-import de.marhali.easyi18n.model.Translation;
 import de.marhali.easyi18n.model.TranslationNode;
+import de.marhali.easyi18n.model.TranslationValue;
 import de.marhali.easyi18n.util.StringUtil;
 
 import org.apache.commons.lang.StringEscapeUtils;
@@ -30,7 +30,7 @@ public class JsonMapper {
                 // Nested element - run recursively
                 read(locale, value.getAsJsonObject(), childNode);
             } else {
-                Translation translation = childNode.getValue();
+                TranslationValue translation = childNode.getValue();
 
                 String content = entry.getValue().isJsonArray()
                         ? JsonArrayMapper.read(value.getAsJsonArray())
@@ -55,7 +55,7 @@ public class JsonMapper {
                     json.add(key, childJson);
                 }
             } else {
-                Translation translation = childNode.getValue();
+                TranslationValue translation = childNode.getValue();
                 String content = translation.get(locale);
 
                 if(content != null) {

src/main/java/de/marhali/easyi18n/io/parser/json/JsonParserStrategy.java

@@ -3,14 +3,15 @@ package de.marhali.easyi18n.io.parser.json;
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
 import com.google.gson.JsonObject;
+
 import com.intellij.openapi.vfs.VirtualFile;
 
 import de.marhali.easyi18n.io.parser.ParserStrategy;
 import de.marhali.easyi18n.model.*;
+import de.marhali.easyi18n.settings.ProjectSettings;
 
 import org.jetbrains.annotations.NotNull;
 
-import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.Reader;
 import java.util.Objects;
@@ -23,7 +24,7 @@ public class JsonParserStrategy extends ParserStrategy {
 
     private static final Gson GSON = new GsonBuilder().setPrettyPrinting().disableHtmlEscaping().create();
 
-    public JsonParserStrategy(@NotNull SettingsState settings) {
+    public JsonParserStrategy(@NotNull ProjectSettings settings) {
         super(settings);
     }
 

src/main/java/de/marhali/easyi18n/io/parser/json5/Json5Mapper.java

@@ -1,12 +1,12 @@
 package de.marhali.easyi18n.io.parser.json5;
 
-import de.marhali.easyi18n.model.Translation;
 import de.marhali.easyi18n.model.TranslationNode;
+import de.marhali.easyi18n.model.TranslationValue;
 import de.marhali.easyi18n.util.StringUtil;
-
 import de.marhali.json5.Json5Element;
 import de.marhali.json5.Json5Object;
 import de.marhali.json5.Json5Primitive;
+
 import org.apache.commons.lang.StringEscapeUtils;
 import org.apache.commons.lang.math.NumberUtils;
 
@@ -28,7 +28,7 @@ public class Json5Mapper {
                 // Nested element - run recursively
                 read(locale, value.getAsJson5Object(), childNode);
             } else {
-                Translation translation = childNode.getValue();
+                TranslationValue translation = childNode.getValue();
 
                 String content = value.isJson5Array()
                         ? Json5ArrayMapper.read(value.getAsJson5Array())
@@ -54,7 +54,7 @@ public class Json5Mapper {
                 }
 
             } else {
-                Translation translation = childNode.getValue();
+                TranslationValue translation = childNode.getValue();
                 String content = translation.get(locale);
                 if(content != null) {
                     if(Json5ArrayMapper.isArray(content)) {

src/main/java/de/marhali/easyi18n/io/parser/json5/Json5ParserStrategy.java

@@ -3,10 +3,10 @@ package de.marhali.easyi18n.io.parser.json5;
 import com.intellij.openapi.vfs.VirtualFile;
 
 import de.marhali.easyi18n.io.parser.ParserStrategy;
-import de.marhali.easyi18n.model.SettingsState;
 import de.marhali.easyi18n.model.TranslationData;
 import de.marhali.easyi18n.model.TranslationFile;
 import de.marhali.easyi18n.model.TranslationNode;
+import de.marhali.easyi18n.settings.ProjectSettings;
 import de.marhali.json5.Json5;
 import de.marhali.json5.Json5Element;
 import de.marhali.json5.Json5Object;
@@ -26,7 +26,7 @@ public class Json5ParserStrategy extends ParserStrategy {
     private static final Json5 JSON5 = Json5.builder(builder ->
             builder.allowInvalidSurrogate().trailingComma().indentFactor(4).build());
 
-    public Json5ParserStrategy(@NotNull SettingsState settings) {
+    public Json5ParserStrategy(@NotNull ProjectSettings settings) {
         super(settings);
     }
 

src/main/java/de/marhali/easyi18n/io/parser/properties/PropertiesMapper.java

@@ -1,8 +1,9 @@
 package de.marhali.easyi18n.io.parser.properties;
 
-import de.marhali.easyi18n.model.KeyPath;
-import de.marhali.easyi18n.model.Translation;
 import de.marhali.easyi18n.model.TranslationData;
+import de.marhali.easyi18n.model.KeyPath;
+import de.marhali.easyi18n.model.TranslationValue;
+import de.marhali.easyi18n.util.KeyPathConverter;
 import de.marhali.easyi18n.util.StringUtil;
 
 import org.apache.commons.lang.StringEscapeUtils;
@@ -16,15 +17,17 @@ import java.util.Map;
  */
 public class PropertiesMapper {
 
-    public static void read(String locale, SortableProperties properties, TranslationData data) {
+    public static void read(String locale, SortableProperties properties,
+                            TranslationData data, KeyPathConverter converter) {
+
         for(Map.Entry<Object, Object> entry : properties.entrySet()) {
-            KeyPath key = new KeyPath(String.valueOf(entry.getKey()));
+            KeyPath key = converter.fromString(String.valueOf(entry.getKey()));
             Object value = entry.getValue();
 
-            Translation translation = data.getTranslation(key);
+            TranslationValue translation = data.getTranslation(key);
 
             if(translation == null) {
-                translation = new Translation();
+                translation = new TranslationValue();
             }
 
             String content = value instanceof String[]
@@ -36,12 +39,14 @@ public class PropertiesMapper {
         }
     }
 
-    public static void write(String locale, SortableProperties properties, TranslationData data) {
-        for(KeyPath key : data.getFullKeys()) {
-            Translation translation = data.getTranslation(key);
+    public static void write(String locale, SortableProperties properties,
+                             TranslationData data, KeyPathConverter converter) {
 
-            if(translation != null && translation.containsKey(locale)) {
-                String simpleKey = key.toSimpleString();
+        for(KeyPath key : data.getFullKeys()) {
+            TranslationValue translation = data.getTranslation(key);
+
+            if(translation != null && translation.containsLocale(locale)) {
+                String simpleKey = converter.toString(key);
                 String content = translation.get(locale);
 
                 if(PropertiesArrayMapper.isArray(content)) {

src/main/java/de/marhali/easyi18n/io/parser/properties/PropertiesParserStrategy.java

@@ -3,10 +3,11 @@ package de.marhali.easyi18n.io.parser.properties;
 import com.intellij.openapi.vfs.VirtualFile;
 
 import de.marhali.easyi18n.io.parser.ParserStrategy;
-import de.marhali.easyi18n.model.SettingsState;
 import de.marhali.easyi18n.model.TranslationData;
 import de.marhali.easyi18n.model.TranslationFile;
 import de.marhali.easyi18n.model.TranslationNode;
+import de.marhali.easyi18n.settings.ProjectSettings;
+import de.marhali.easyi18n.util.KeyPathConverter;
 
 import org.jetbrains.annotations.NotNull;
 
@@ -20,8 +21,11 @@ import java.io.StringWriter;
  */
 public class PropertiesParserStrategy extends ParserStrategy {
 
-    public PropertiesParserStrategy(@NotNull SettingsState settings) {
+    private final @NotNull KeyPathConverter converter;
+
+    public PropertiesParserStrategy(@NotNull ProjectSettings settings) {
         super(settings);
+        this.converter = new KeyPathConverter(settings);
     }
 
     @Override
@@ -33,9 +37,9 @@ public class PropertiesParserStrategy extends ParserStrategy {
         TranslationData targetData = new TranslationData(data.getLocales(), targetNode);
 
         try(Reader reader = new InputStreamReader(vf.getInputStream(), vf.getCharset())) {
-            SortableProperties input = new SortableProperties(this.settings.isSortKeys());
+            SortableProperties input = new SortableProperties(this.settings.isSorting());
             input.load(reader);
-            PropertiesMapper.read(file.getLocale(), input, targetData);
+            PropertiesMapper.read(file.getLocale(), input, targetData, converter);
         }
     }
 
@@ -44,8 +48,8 @@ public class PropertiesParserStrategy extends ParserStrategy {
         TranslationNode targetNode = super.getTargetNode(data, file);
         TranslationData targetData = new TranslationData(data.getLocales(), targetNode);
 
-        SortableProperties output = new SortableProperties(this.settings.isSortKeys());
-        PropertiesMapper.write(file.getLocale(), output, targetData);
+        SortableProperties output = new SortableProperties(this.settings.isSorting());
+        PropertiesMapper.write(file.getLocale(), output, targetData, converter);
 
         try(StringWriter writer = new StringWriter()) {
             output.store(writer, null);

src/main/java/de/marhali/easyi18n/io/parser/yaml/YamlMapper.java

@@ -1,7 +1,7 @@
 package de.marhali.easyi18n.io.parser.yaml;
 
-import de.marhali.easyi18n.model.Translation;
 import de.marhali.easyi18n.model.TranslationNode;
+import de.marhali.easyi18n.model.TranslationValue;
 import de.marhali.easyi18n.util.StringUtil;
 
 import org.apache.commons.lang.StringEscapeUtils;
@@ -28,7 +28,7 @@ public class YamlMapper {
                 // Nested element - run recursively
                 read(locale, (MapSection) value, childNode);
             } else {
-                Translation translation = childNode.getValue();
+                TranslationValue translation = childNode.getValue();
 
                 String content = value instanceof ListSection
                         ? YamlArrayMapper.read((ListSection) value)
@@ -53,7 +53,7 @@ public class YamlMapper {
                     section.setInScope(key, childSection);
                 }
             } else {
-                Translation translation = childNode.getValue();
+                TranslationValue translation = childNode.getValue();
                 String content = translation.get(locale);
 
                 if(content != null) {

src/main/java/de/marhali/easyi18n/io/parser/yaml/YamlParserStrategy.java

@@ -3,10 +3,10 @@ package de.marhali.easyi18n.io.parser.yaml;
 import com.intellij.openapi.vfs.VirtualFile;
 
 import de.marhali.easyi18n.io.parser.ParserStrategy;
-import de.marhali.easyi18n.model.SettingsState;
 import de.marhali.easyi18n.model.TranslationData;
 import de.marhali.easyi18n.model.TranslationFile;
 import de.marhali.easyi18n.model.TranslationNode;
+import de.marhali.easyi18n.settings.ProjectSettings;
 
 import org.jetbrains.annotations.NotNull;
 
@@ -22,7 +22,7 @@ import java.io.Reader;
  */
 public class YamlParserStrategy extends ParserStrategy {
 
-    public YamlParserStrategy(@NotNull SettingsState settings) {
+    public YamlParserStrategy(@NotNull ProjectSettings settings) {
         super(settings);
     }
 

src/main/java/de/marhali/easyi18n/model/KeyPath.java

@@ -1,58 +1,37 @@
 package de.marhali.easyi18n.model;
 
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 import java.util.ArrayList;
-import java.util.Collection;
 import java.util.List;
-import java.util.regex.Pattern;
 
 /**
- * Represents a full translation key with all sections.
- * Implementations can use single section or variable section length variants.
- * The respective layer (io, presentation) is responsible for using the correct mapping mechanism.
+ * Represents the absolute key path for a desired translation.
+ * The key could be based one or many sections.
+ * Classes implementing this structure need to take care on how to layer translations paths.
  * @author marhali
  */
 public class KeyPath extends ArrayList<String> {
 
-    public static final String DELIMITER = ".";
+    public KeyPath() {}
 
-    public static KeyPath of(@NotNull String... path) {
-        return new KeyPath(List.of(path));
+    public KeyPath(@Nullable String... path) {
+        super.addAll(List.of(path));
     }
 
-    public KeyPath() {
-        super();
+    public KeyPath(@NotNull List<String> path) {
+        super(path);
     }
 
-    public KeyPath(@NotNull KeyPath path, String... pathToAppend) {
+    public KeyPath(@NotNull KeyPath path, @Nullable String... pathToAppend) {
         this(path);
-        this.addAll(List.of(pathToAppend));
+        super.addAll(List.of(pathToAppend));
     }
 
-    public KeyPath(@NotNull Collection<? extends String> c) {
-        super(c);
-    }
-
-    public KeyPath(@NotNull String simplePath) {
-        this(List.of(simplePath.split(Pattern.quote(DELIMITER))));
-    }
-
-    /**
-     * <b>Note: </b>Use {@link KeyPathConverter} if you want to keep hierarchy.
-     * @return simple path representation by adding delimiter between the secton nodes
-     */
-    public String toSimpleString() {
-        StringBuilder builder = new StringBuilder();
-
-        for(String section : this) {
-            if(builder.length() > 0) {
-                builder.append(DELIMITER);
-            }
-
-            builder.append(section);
-        }
-
-        return builder.toString();
+    @Override
+    public String toString() {
+        // Just a simple array view (e.g. [first, second]) - use KeyPathConverter to properly convert a key path
+        return super.toString();
     }
 }

src/main/java/de/marhali/easyi18n/model/KeyPathConverter.java

@@ -1,69 +0,0 @@
-package de.marhali.easyi18n.model;
-
-import com.intellij.openapi.project.Project;
-
-import de.marhali.easyi18n.service.SettingsService;
-
-import org.jetbrains.annotations.NotNull;
-
-import java.util.regex.Pattern;
-
-/**
- * Responsible for mapping {@link KeyPath} into single string and backwards.
- * If nesting is enabled the delimiter within a section is escaped otherwise the delimiter between the key sections.
- * @author marhali
- */
-public class KeyPathConverter {
-
-    private final boolean nestKeys;
-
-    public KeyPathConverter(boolean nestKeys) {
-        this.nestKeys = nestKeys;
-    }
-
-    public KeyPathConverter(@NotNull Project project) {
-        this(SettingsService.getInstance(project).getState().isNestedKeys());
-    }
-
-    public @NotNull String concat(@NotNull KeyPath path) {
-        StringBuilder builder = new StringBuilder();
-
-        for(String section : path) {
-            if(builder.length() > 0) {
-                if(!this.nestKeys) {
-                    builder.append("\\\\");
-                }
-
-                builder.append(KeyPath.DELIMITER);
-            }
-
-            if(this.nestKeys) {
-                builder.append(section.replace(KeyPath.DELIMITER, "\\\\" + KeyPath.DELIMITER));
-            } else {
-                builder.append(section);
-            }
-        }
-
-        return builder.toString();
-    }
-
-    public @NotNull KeyPath split(@NotNull String concatPath) {
-        String[] sections = concatPath.split(this.nestKeys ?
-                "(?<!\\\\)" + Pattern.quote(KeyPath.DELIMITER) : Pattern.quote("\\\\" + KeyPath.DELIMITER));
-
-        KeyPath path = new KeyPath();
-
-        for(String section : sections) {
-            path.add(section.replace("\\\\" + KeyPath.DELIMITER, KeyPath.DELIMITER));
-        }
-
-        return path;
-    }
-
-    @Override
-    public String toString() {
-        return "KeyPathConverter{" +
-                "nestKeys=" + nestKeys +
-                '}';
-    }
-}

src/main/java/de/marhali/easyi18n/model/KeyedTranslation.java

@@ -1,43 +0,0 @@
-package de.marhali.easyi18n.model;
-
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
-
-/**
- * I18n translation with associated key path (full-key).
- * @author marhali
- */
-public class KeyedTranslation {
-
-    private @NotNull KeyPath key;
-    private @Nullable Translation translation;
-
-    public KeyedTranslation(@NotNull KeyPath key, @Nullable Translation translation) {
-        this.key = key;
-        this.translation = translation;
-    }
-
-    public KeyPath getKey() {
-        return key;
-    }
-
-    public void setKey(KeyPath key) {
-        this.key = key;
-    }
-
-    public @Nullable Translation getTranslation() {
-        return translation;
-    }
-
-    public void setTranslation(@NotNull Translation translation) {
-        this.translation = translation;
-    }
-
-    @Override
-    public String toString() {
-        return "KeyedTranslation{" +
-                "key='" + key + '\'' +
-                ", translation=" + translation +
-                '}';
-    }
-}

src/main/java/de/marhali/easyi18n/model/SettingsState.java

@@ -1,105 +0,0 @@
-package de.marhali.easyi18n.model;
-
-import de.marhali.easyi18n.io.parser.ParserStrategyType;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
-
-/**
- * Represents the persistent settings which can be configured.
- * @author marhali
- */
-public class SettingsState {
-
-    public static final String DEFAULT_PREVIEW_LOCALE = "en";
-    public static final FolderStrategyType DEFAULT_FOLDER_STRATEGY = FolderStrategyType.SINGLE;
-    public static final ParserStrategyType DEFAULT_PARSER_STRATEGY = ParserStrategyType.JSON;
-    public static final String DEFAULT_FILE_PATTERN = "*.*";
-    public static final String DEFAULT_PATH_PREFIX = "";
-    public static final boolean DEFAULT_SORT_KEYS = true;
-    public static final boolean DEFAULT_NESTED_KEYS = true;
-    public static final boolean DEFAULT_CODE_ASSISTANCE = true;
-
-    private String localesPath;
-    private FolderStrategyType folderStrategy;
-    private ParserStrategyType parserStrategy;
-    private String filePattern;
-    private String previewLocale;
-    private String pathPrefix;
-    private Boolean sortKeys;
-    private Boolean nestedKeys;
-    private Boolean codeAssistance;
-
-    public SettingsState() {}
-
-    public @Nullable String getLocalesPath() {
-        return localesPath;
-    }
-
-    public void setLocalesPath(String localesPath) {
-        this.localesPath = localesPath;
-    }
-
-    public @NotNull FolderStrategyType getFolderStrategy() {
-        return folderStrategy != null ? folderStrategy : DEFAULT_FOLDER_STRATEGY;
-    }
-
-    public void setFolderStrategy(FolderStrategyType folderStrategy) {
-        this.folderStrategy = folderStrategy;
-    }
-
-    public @NotNull ParserStrategyType getParserStrategy() {
-        return parserStrategy != null ? parserStrategy : DEFAULT_PARSER_STRATEGY;
-    }
-
-    public void setParserStrategy(ParserStrategyType parserStrategy) {
-        this.parserStrategy = parserStrategy;
-    }
-
-    public @NotNull String getFilePattern() {
-        return filePattern != null ? filePattern : DEFAULT_FILE_PATTERN;
-    }
-
-    public void setFilePattern(String filePattern) {
-        this.filePattern = filePattern;
-    }
-
-    public @NotNull String getPreviewLocale() {
-        return previewLocale != null ? previewLocale : DEFAULT_PREVIEW_LOCALE;
-    }
-
-    public void setPreviewLocale(String previewLocale) {
-        this.previewLocale = previewLocale;
-    }
-
-    public @NotNull String getPathPrefix() {
-        return pathPrefix != null ? pathPrefix : DEFAULT_PATH_PREFIX;
-    }
-
-    public void setPathPrefix(String pathPrefix) {
-        this.pathPrefix = pathPrefix;
-    }
-
-    public boolean isSortKeys() {
-        return sortKeys == null ? DEFAULT_SORT_KEYS : sortKeys;
-    }
-
-    public void setSortKeys(boolean sortKeys) {
-        this.sortKeys = sortKeys;
-    }
-
-    public boolean isNestedKeys() {
-        return nestedKeys == null ? DEFAULT_NESTED_KEYS : nestedKeys;
-    }
-
-    public void setNestedKeys(boolean nestedKeys) {
-        this.nestedKeys = nestedKeys;
-    }
-
-    public boolean isCodeAssistance() {
-        return codeAssistance == null ? DEFAULT_CODE_ASSISTANCE : codeAssistance;
-    }
-
-    public void setCodeAssistance(boolean codeAssistance) {
-        this.codeAssistance = codeAssistance;
-    }
-}

src/main/java/de/marhali/easyi18n/model/Translation.java

@@ -1,29 +1,54 @@
 package de.marhali.easyi18n.model;
 
-import java.util.HashMap;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 /**
- * Represents all translations for an element. The assignment to an element is done in the using class.
- * This class contains only the translations for this unspecific element.
+ * Represents a translation with defined key and locale values.
+ *
  * @author marhali
  */
-public class Translation extends HashMap<String, String> {
-    public Translation() {
-        super();
+public class Translation {
+
+    private final @NotNull KeyPath key;
+    private @Nullable TranslationValue value;
+
+    /**
+     * Constructs a new translation instance.
+     * @param key Absolute key path
+     * @param value Values to set - nullable to indicate removal
+     */
+    public Translation(@NotNull KeyPath key, @Nullable TranslationValue value) {
+        this.key = key;
+        this.value = value;
     }
 
-    public Translation(String locale, String content) {
-        this();
-        super.put(locale, content);
+    /**
+     * @return Absolute key path
+     */
+    public @NotNull KeyPath getKey() {
+        return key;
     }
 
-    public Translation add(String locale, String content) {
-        super.put(locale, content);
-        return this;
+    /**
+     * @return values - nullable to indicate removal
+     */
+    public @Nullable TranslationValue getValue() {
+        return value;
+    }
+
+    /**
+     * @param value Values to set - nullable to indicate removal
+     */
+    public void setValue(@Nullable TranslationValue value) {
+        this.value = value;
     }
 
     @Override
     public String toString() {
-        return super.toString();
+        return "Translation{" +
+                "key=" + key +
+                ", value=" + value +
+                '}';
     }
 }

src/main/java/de/marhali/easyi18n/model/TranslationData.java

@@ -93,7 +93,7 @@ public class TranslationData {
      * @param fullPath Absolute translation key path
      * @return Found translation. Can be null if path is empty or is not a leaf element
      */
-    public @Nullable Translation getTranslation(@NotNull KeyPath fullPath) {
+    public @Nullable TranslationValue getTranslation(@NotNull KeyPath fullPath) {
         TranslationNode node = this.getNode(fullPath);
 
         if(node == null || !node.isLeaf()) {
@@ -109,7 +109,7 @@ public class TranslationData {
      * @param fullPath Absolute translation key path
      * @param translation Translation to set. Can be null to delete the corresponding node
      */
-    public void setTranslation(@NotNull KeyPath fullPath, @Nullable Translation translation) {
+    public void setTranslation(@NotNull KeyPath fullPath, @Nullable TranslationValue translation) {
         if(fullPath.isEmpty()) {
             throw new IllegalArgumentException("Key path cannot be empty");
         }

src/main/java/de/marhali/easyi18n/model/TranslationNode.java

@@ -27,7 +27,7 @@ public class TranslationNode {
     private Map<String, TranslationNode> children;
 
     @NotNull
-    private Translation value;
+    private TranslationValue value;
 
     public TranslationNode(boolean sort) {
         this(sort ? new TreeMap<>() : new LinkedHashMap<>());
@@ -40,7 +40,7 @@ public class TranslationNode {
     public TranslationNode(@NotNull Map<String, TranslationNode> children) {
         this.parent = null;
         this.children = children;
-        this.value = new Translation();
+        this.value = new TranslationValue();
     }
 
     /**
@@ -62,11 +62,11 @@ public class TranslationNode {
         this.parent = parent;
     }
 
-    public @NotNull Translation getValue() {
+    public @NotNull TranslationValue getValue() {
         return value;
     }
 
-    public void setValue(@NotNull Translation value) {
+    public void setValue(@NotNull TranslationValue value) {
         this.children.clear();
         this.value = value;
     }
@@ -93,7 +93,7 @@ public class TranslationNode {
         }
     }
 
-    public void setChildren(@NotNull String key, @NotNull Translation translation) {
+    public void setChildren(@NotNull String key, @NotNull TranslationValue translation) {
         this.setChildren(key).setValue(translation);
     }
 

src/main/java/de/marhali/easyi18n/model/TranslationValue.java

@@ -0,0 +1,70 @@
+package de.marhali.easyi18n.model;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * Represents the set values behind a specific translation.
+ * @author marhali
+ */
+public class TranslationValue {
+
+    private @NotNull Map<String, String> localeValues;
+
+    public TranslationValue() {
+        this.localeValues = new HashMap<>();
+    }
+
+    public TranslationValue(@NotNull String locale, @NotNull String content) {
+        this();
+        localeValues.put(locale, content);
+    }
+
+    public Set<Map.Entry<String, String>> getEntries() {
+        return this.localeValues.entrySet();
+    }
+
+    public Collection<String> getLocaleContents() {
+        return this.localeValues.values();
+    }
+
+    public void setLocaleValues(@NotNull Map<String, String> localeValues) {
+        this.localeValues = localeValues;
+    }
+
+    public @Nullable String get(@NotNull String locale) {
+        return this.localeValues.get(locale);
+    }
+
+    public void put(@NotNull String locale, @NotNull String content) {
+        this.localeValues.put(locale, content);
+    }
+
+    public void remove(@NotNull String locale) {
+        this.localeValues.remove(locale);
+    }
+
+    public boolean containsLocale(@NotNull String locale) {
+        return this.localeValues.containsKey(locale);
+    }
+
+    public int size() {
+        return this.localeValues.size();
+    }
+
+    public void clear() {
+        this.localeValues.clear();
+    }
+
+    @Override
+    public String toString() {
+        return "TranslationValue{" +
+                "localeValues=" + localeValues +
+                '}';
+    }
+}

src/main/java/de/marhali/easyi18n/model/action/TranslationCreate.java

@@ -1,4 +1,6 @@
-package de.marhali.easyi18n.model;
+package de.marhali.easyi18n.model.action;
+
+import de.marhali.easyi18n.model.Translation;
 
 import org.jetbrains.annotations.NotNull;
 
@@ -7,7 +9,7 @@ import org.jetbrains.annotations.NotNull;
  * @author marhali
  */
 public class TranslationCreate extends TranslationUpdate {
-    public TranslationCreate(@NotNull KeyedTranslation translation) {
+    public TranslationCreate(@NotNull Translation translation) {
         super(null, translation);
     }
 }

src/main/java/de/marhali/easyi18n/model/action/TranslationDelete.java

@@ -1,4 +1,6 @@
-package de.marhali.easyi18n.model;
+package de.marhali.easyi18n.model.action;
+
+import de.marhali.easyi18n.model.Translation;
 
 import org.jetbrains.annotations.NotNull;
 
@@ -7,7 +9,7 @@ import org.jetbrains.annotations.NotNull;
  * @author marhali
  */
 public class TranslationDelete extends TranslationUpdate {
-    public TranslationDelete(@NotNull KeyedTranslation translation) {
+    public TranslationDelete(@NotNull Translation translation) {
         super(translation, null);
     }
 }

src/main/java/de/marhali/easyi18n/model/action/TranslationUpdate.java

@@ -1,5 +1,6 @@
-package de.marhali.easyi18n.model;
+package de.marhali.easyi18n.model.action;
 
+import de.marhali.easyi18n.model.Translation;
 import org.jetbrains.annotations.Nullable;
 
 /**
@@ -10,19 +11,19 @@ import org.jetbrains.annotations.Nullable;
  */
 public class TranslationUpdate {
 
-    private final @Nullable KeyedTranslation origin;
-    private final @Nullable KeyedTranslation change;
+    private final @Nullable Translation origin;
+    private final @Nullable Translation change;
 
-    public TranslationUpdate(@Nullable KeyedTranslation origin, @Nullable KeyedTranslation change) {
+    public TranslationUpdate(@Nullable Translation origin, @Nullable Translation change) {
         this.origin = origin;
         this.change = change;
     }
 
-    public @Nullable KeyedTranslation getOrigin() {
+    public @Nullable Translation getOrigin() {
         return origin;
     }
 
-    public @Nullable KeyedTranslation getChange() {
+    public @Nullable Translation getChange() {
         return change;
     }
 

src/main/java/de/marhali/easyi18n/service/SettingsService.java

@@ -1,37 +0,0 @@
-package de.marhali.easyi18n.service;
-
-import com.intellij.openapi.components.PersistentStateComponent;
-import com.intellij.openapi.components.State;
-import com.intellij.openapi.project.Project;
-
-import de.marhali.easyi18n.model.SettingsState;
-
-import org.jetbrains.annotations.NotNull;
-
-/**
- * Persistent settings storage at project level.
- * @author marhali
- */
-@State(name = "EasyI18nSettings")
-public class SettingsService implements PersistentStateComponent<SettingsState> {
-
-    public static SettingsService getInstance(Project project) {
-        return project.getService(SettingsService.class);
-    }
-
-    private SettingsState state;
-
-    public SettingsService() {
-        this.state = new SettingsState();
-    }
-
-    @Override
-    public @NotNull SettingsState getState() {
-        return state;
-    }
-
-    @Override
-    public void loadState(@NotNull SettingsState state) {
-        this.state = state;
-    }
-}

src/main/java/de/marhali/easyi18n/settings/ProjectSettings.java

@@ -0,0 +1,35 @@
+package de.marhali.easyi18n.settings;
+
+import de.marhali.easyi18n.io.parser.ParserStrategyType;
+import de.marhali.easyi18n.io.folder.FolderStrategyType;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * API to access the project-specific configuration for this plugin.
+ * @author marhaliu
+ */
+public interface ProjectSettings {
+    // Resource Configuration
+    @Nullable String getLocalesDirectory();
+    @NotNull FolderStrategyType getFolderStrategy();
+    @NotNull ParserStrategyType getParserStrategy();
+    @NotNull String getFilePattern();
+
+    boolean isSorting();
+
+    // Editor Configuration
+    @Nullable String getNamespaceDelimiter();
+    @NotNull String getSectionDelimiter();
+    @Nullable String getContextDelimiter();
+    @Nullable String getPluralDelimiter();
+    @Nullable String getDefaultNamespace();
+    @NotNull String getPreviewLocale();
+
+    boolean isNestedKeys();
+    boolean isAssistance();
+
+    // Experimental Configuration
+    boolean isAlwaysFold();
+}

src/main/java/de/marhali/easyi18n/settings/ProjectSettingsComponent.java

@@ -0,0 +1,228 @@
+package de.marhali.easyi18n.settings;
+
+import com.intellij.ide.BrowserUtil;
+import com.intellij.openapi.fileChooser.FileChooserDescriptor;
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.ui.ComboBox;
+import com.intellij.openapi.ui.TextFieldWithBrowseButton;
+import com.intellij.ui.JBColor;
+import com.intellij.ui.TitledSeparator;
+import com.intellij.ui.components.*;
+import com.intellij.ui.components.fields.ExtendableTextField;
+import com.intellij.util.ui.FormBuilder;
+
+import de.marhali.easyi18n.io.parser.ArrayMapper;
+import de.marhali.easyi18n.io.parser.ParserStrategyType;
+import de.marhali.easyi18n.settings.presets.Preset;
+
+import javax.swing.*;
+import javax.swing.event.DocumentEvent;
+import javax.swing.event.DocumentListener;
+import java.awt.*;
+import java.awt.event.ActionListener;
+import java.awt.event.ItemEvent;
+import java.awt.event.ItemListener;
+import java.util.ResourceBundle;
+
+/**
+ * Configuration panel with all possible options for this plugin.
+ * @author marhali
+ */
+public class ProjectSettingsComponent extends ProjectSettingsComponentState {
+
+    private final Project project;
+    private final ResourceBundle bundle;
+    private final JPanel mainPanel;
+
+    // Data fields are provided by the underlying state class
+
+    public ProjectSettingsComponent(Project project) {
+        this.project = project;
+        this.bundle = ResourceBundle.getBundle("messages");
+
+        this.mainPanel = FormBuilder.createFormBuilder()
+                .addComponent(new JBLabel(bundle.getString("settings.hint.text")))
+                .addComponent(new ActionLink(bundle.getString("settings.hint.action"),
+                        (ActionListener) (var) -> BrowserUtil.browse("https://github.com/marhali/easy-i18n")))
+                .addVerticalGap(24)
+                .addLabeledComponent(bundle.getString("settings.preset.title"), constructPresetField(), 1, false)
+                .addVerticalGap(12)
+                .addComponent(new TitledSeparator(bundle.getString("settings.resource.title")))
+                .addLabeledComponent(bundle.getString("settings.resource.path.title"), constructLocalesDirectoryField(), 1, false)
+                .addLabeledComponent(bundle.getString("settings.resource.strategy"), constructFileStrategyPanel(), 1, false)
+                .addVerticalGap(12)
+                .addComponent(constructSortingField())
+                .addVerticalGap(24)
+                .addComponent(new TitledSeparator(bundle.getString("settings.editor.title")))
+                .addLabeledComponent(bundle.getString("settings.editor.key.title"), constructKeyStrategyPanel(), 1, false)
+                .addLabeledComponent(bundle.getString("settings.editor.default-namespace.title"), constructDefaultNamespaceField(), 1, false)
+                .addLabeledComponent(bundle.getString("settings.editor.preview.title"), constructPreviewLocaleField(), 1, false)
+                .addVerticalGap(12)
+                .addComponent(constructNestedKeysField())
+                .addComponent(constructAssistanceField())
+                .addVerticalGap(24)
+                .addComponent(new TitledSeparator(bundle.getString("settings.experimental.title")))
+                .addComponent(constructAlwaysFoldField())
+                .addComponentFillVertically(new JPanel(), 0)
+                .getPanel();
+    }
+
+    private JComponent constructPresetField() {
+        preset = new ComboBox<>(Preset.values());
+        preset.setToolTipText(bundle.getString("settings.preset.tooltip"));
+        preset.setMinimumAndPreferredWidth(196);
+        preset.addActionListener(e -> setState(preset.getItem().config())); // Listen to selection change
+        return preset;
+    }
+
+    private JComponent constructLocalesDirectoryField() {
+        localesDirectory = new TextFieldWithBrowseButton();
+        localesDirectory.setToolTipText(bundle.getString("settings.resource.path.tooltip"));
+        localesDirectory.addBrowseFolderListener(bundle.getString("settings.resource.path.window"),
+                bundle.getString("settings.resource.path.tooltip"), project,
+                new FileChooserDescriptor(false, true,
+                        false, false, false, false));
+
+        // Listen to value change
+        localesDirectory.getTextField().getDocument().addDocumentListener(new DocumentListener() {
+            @Override
+            public void insertUpdate(DocumentEvent e) {
+                validateLocalesDirectory();
+            }
+
+            @Override
+            public void removeUpdate(DocumentEvent e) {
+                validateLocalesDirectory();
+            }
+
+            @Override
+            public void changedUpdate(DocumentEvent e) {
+                validateLocalesDirectory();
+            }
+        });
+
+        validateLocalesDirectory();
+        return localesDirectory;
+    }
+
+    private void validateLocalesDirectory() {
+        // Paint red border to indicate missing value
+        localesDirectory.setBorder(localesDirectory.getText().isEmpty()
+                ? BorderFactory.createLineBorder(JBColor.red) : null);
+    }
+
+    private JPanel constructFileStrategyPanel() {
+        JPanel panel = new JBPanel<>(new GridBagLayout());
+        GridBagConstraints constraints = new GridBagConstraints();
+
+        /* folder strategy */
+        folderStrategy = new ComboBox<>(bundle.getString("settings.resource.folder.items").split(ArrayMapper.SPLITERATOR_REGEX));
+        folderStrategy.setToolTipText(bundle.getString("settings.resource.folder.tooltip"));
+        folderStrategy.setMinimumAndPreferredWidth(256);
+        constraints.fill = GridBagConstraints.HORIZONTAL;
+        constraints.gridx = 0;
+        constraints.gridy = 0;
+        panel.add(folderStrategy, constraints);
+
+        /* parser strategy */
+        parserStrategy = new ComboBox<>(bundle.getString("settings.resource.parser.items").split(ArrayMapper.SPLITERATOR_REGEX));
+        parserStrategy.setToolTipText(bundle.getString("settings.resource.parser.tooltip"));
+        parserStrategy.addItemListener(handleParserChange());
+        parserStrategy.setMinimumAndPreferredWidth(128);
+        constraints.fill = GridBagConstraints.HORIZONTAL;
+        constraints.gridx = 1;
+        constraints.gridy = 0;
+        panel.add(parserStrategy, constraints);
+
+        /* file pattern strategy */
+        filePattern = new JBTextField();
+        filePattern.setToolTipText(bundle.getString("settings.resource.file-pattern.tooltip"));
+        constraints.fill = GridBagConstraints.HORIZONTAL;
+        constraints.gridx = 2;
+        constraints.gridy = 0;
+        constraints.weightx = 1;
+        panel.add(filePattern, constraints);
+
+        return panel;
+    }
+
+    private JComponent constructSortingField() {
+        sorting = new JBCheckBox(bundle.getString("settings.resource.sorting.title"));
+        sorting.setToolTipText(bundle.getString("settings.resource.sorting.tooltip"));
+        return sorting;
+    }
+
+    private JPanel constructKeyStrategyPanel() {
+        JPanel panel = new JBPanel<>(new FlowLayout(FlowLayout.LEFT));
+
+        panel.add(new JBLabel(bundle.getString("settings.editor.key.namespace.title")));
+        panel.add(namespaceDelimiter = createDelimiterField(bundle.getString("settings.editor.key.namespace.tooltip")));
+        panel.add(new JBLabel(bundle.getString("settings.editor.key.section.title")));
+        panel.add(sectionDelimiter = createDelimiterField(bundle.getString("settings.editor.key.section.tooltip")));
+        panel.add(createBoldLabel(bundle.getString("settings.editor.key.leaf.title")));
+        panel.add(contextDelimiter = createDelimiterField(bundle.getString("settings.editor.key.context.tooltip")));
+        panel.add(createBoldLabel(bundle.getString("settings.editor.key.context.title")));
+        panel.add(pluralDelimiter = createDelimiterField(bundle.getString("settings.editor.key.plural.tooltip")));
+        panel.add(createBoldLabel(bundle.getString("settings.editor.key.plural.title")));
+
+        return panel;
+    }
+
+    private JLabel createBoldLabel(String title) {
+        JBLabel label = new JBLabel(title);
+        Font font = label.getFont();
+        label.setFont(font.deriveFont(font.getStyle() | Font.BOLD));
+        return label;
+    }
+
+    private JTextField createDelimiterField(String tooltip) {
+        JBTextField field = new JBTextField();
+        field.setHorizontalAlignment(JTextField.CENTER);
+        field.setToolTipText(tooltip);
+        return field;
+    }
+
+    private JComponent constructDefaultNamespaceField() {
+        defaultNamespace = new ExtendableTextField(20);
+        defaultNamespace.setToolTipText(bundle.getString("settings.editor.default-namespace.tooltip"));
+        return defaultNamespace;
+    }
+
+    private JComponent constructPreviewLocaleField() {
+        previewLocale = new ExtendableTextField(12);
+        previewLocale.setToolTipText(bundle.getString("settings.editor.preview.tooltip"));
+        return previewLocale;
+    }
+
+    private JComponent constructNestedKeysField() {
+        nestedKeys = new JBCheckBox(bundle.getString("settings.editor.key.nesting.title"));
+        nestedKeys.setToolTipText(bundle.getString("settings.editor.key.nesting.tooltip"));
+        return nestedKeys;
+    }
+
+    private JComponent constructAssistanceField() {
+        assistance = new JBCheckBox(bundle.getString("settings.editor.assistance.title"));
+        assistance.setToolTipText(bundle.getString("settings.editor.assistance.tooltip"));
+        return assistance;
+    }
+
+    private JComponent constructAlwaysFoldField() {
+        alwaysFold = new JBCheckBox(bundle.getString("settings.experimental.always-fold.title"));
+        alwaysFold.setToolTipText(bundle.getString("settings.experimental.always-fold.tooltip"));
+        return alwaysFold;
+    }
+
+    private ItemListener handleParserChange() {
+        return e -> {
+            if(e.getStateChange() == ItemEvent.SELECTED) {
+                // Automatically suggest file pattern option on parser change
+                ParserStrategyType newStrategy = ParserStrategyType.fromIndex(parserStrategy.getSelectedIndex());
+                filePattern.setText(newStrategy.getExampleFilePattern());
+            }
+        };
+    }
+
+    public JPanel getMainPanel() {
+        return mainPanel;
+    }
+}

src/main/java/de/marhali/easyi18n/settings/ProjectSettingsComponentState.java

@@ -0,0 +1,89 @@
+package de.marhali.easyi18n.settings;
+
+import com.intellij.openapi.ui.ComboBox;
+import com.intellij.openapi.ui.TextFieldWithBrowseButton;
+
+import de.marhali.easyi18n.io.parser.ParserStrategyType;
+import de.marhali.easyi18n.io.folder.FolderStrategyType;
+import de.marhali.easyi18n.settings.presets.Preset;
+
+import javax.swing.*;
+
+/**
+ * Mandatory for state management for the project settings component.
+ * @author marhali
+ */
+public class ProjectSettingsComponentState {
+
+    protected ComboBox<Preset> preset;
+
+    // Resource Configuration
+    protected TextFieldWithBrowseButton localesDirectory;
+    protected ComboBox<String> folderStrategy;
+    protected ComboBox<String> parserStrategy;
+    protected JTextField filePattern;
+
+    protected JCheckBox sorting;
+
+    // Editor configuration
+    protected JTextField namespaceDelimiter;
+    protected JTextField sectionDelimiter;
+    protected JTextField contextDelimiter;
+    protected JTextField pluralDelimiter;
+    protected JTextField defaultNamespace;
+    protected JTextField previewLocale;
+
+    protected JCheckBox nestedKeys;
+    protected JCheckBox assistance;
+
+    // Experimental configuration
+    protected JCheckBox alwaysFold;
+
+    protected ProjectSettingsState getState() {
+        // Every field needs to provide its state
+        ProjectSettingsState state = new ProjectSettingsState();
+
+        state.setLocalesDirectory(localesDirectory.getText());
+        state.setFolderStrategy(FolderStrategyType.fromIndex(folderStrategy.getSelectedIndex()));
+        state.setParserStrategy(ParserStrategyType.fromIndex(parserStrategy.getSelectedIndex()));
+        state.setFilePattern(filePattern.getText());
+
+        state.setSorting(sorting.isSelected());
+
+        state.setNamespaceDelimiter(namespaceDelimiter.getText());
+        state.setSectionDelimiter(sectionDelimiter.getText());
+        state.setContextDelimiter(contextDelimiter.getText());
+        state.setPluralDelimiter(pluralDelimiter.getText());
+        state.setDefaultNamespace(defaultNamespace.getText());
+        state.setPreviewLocale(previewLocale.getText());
+
+        state.setNestedKeys(nestedKeys.isSelected());
+        state.setAssistance(assistance.isSelected());
+
+        state.setAlwaysFold(alwaysFold.isSelected());
+
+        return state;
+    }
+
+    protected void setState(ProjectSettings state) {
+        // Update every field with the new state
+        localesDirectory.setText(state.getLocalesDirectory());
+        folderStrategy.setSelectedIndex(state.getFolderStrategy().toIndex());
+        parserStrategy.setSelectedIndex((state.getParserStrategy().toIndex()));
+        filePattern.setText(state.getFilePattern());
+
+        sorting.setSelected(state.isSorting());
+
+        namespaceDelimiter.setText(state.getNamespaceDelimiter());
+        sectionDelimiter.setText(state.getSectionDelimiter());
+        contextDelimiter.setText(state.getContextDelimiter());
+        pluralDelimiter.setText(state.getPluralDelimiter());
+        defaultNamespace.setText(state.getDefaultNamespace());
+        previewLocale.setText(state.getPreviewLocale());
+
+        nestedKeys.setSelected(state.isNestedKeys());
+        assistance.setSelected(state.isAssistance());
+
+        alwaysFold.setSelected(state.isAlwaysFold());
+    }
+}

src/main/java/de/marhali/easyi18n/settings/ProjectSettingsConfigurable.java

@@ -0,0 +1,59 @@
+package de.marhali.easyi18n.settings;
+
+import com.intellij.openapi.options.Configurable;
+import com.intellij.openapi.project.Project;
+
+import de.marhali.easyi18n.InstanceManager;
+
+import org.jetbrains.annotations.Nullable;
+
+import javax.swing.*;
+
+/**
+ * IDE settings panel for this plugin
+ * @author marhali
+ */
+public class ProjectSettingsConfigurable implements Configurable {
+
+    private final Project project;
+
+    private ProjectSettingsComponent component;
+
+    public ProjectSettingsConfigurable(Project project) {
+        this.project = project;
+    }
+
+    @Override
+    public String getDisplayName() {
+        return "Easy I18n";
+    }
+
+    @Override
+    public @Nullable JComponent createComponent() {
+        component = new ProjectSettingsComponent(project);
+        component.setState(ProjectSettingsService.get(project).getState());
+        return component.getMainPanel();
+    }
+
+    @Override
+    public boolean isModified() {
+        ProjectSettingsState originState = ProjectSettingsService.get(project).getState();
+        return !originState.equals(component.getState());
+    }
+
+    @Override
+    public void apply() {
+        ProjectSettingsService.get(project).setState(component.getState());
+        InstanceManager.get(project).reload();
+    }
+
+    @Override
+    public void reset() {
+        component.setState(ProjectSettingsService.get(project).getState());
+    }
+
+    @Override
+    public void disposeUIResources() {
+        component = null;
+    }
+}

src/main/java/de/marhali/easyi18n/settings/ProjectSettingsService.java

@@ -0,0 +1,47 @@
+package de.marhali.easyi18n.settings;
+
+import com.intellij.openapi.components.PersistentStateComponent;
+import com.intellij.openapi.components.State;
+import com.intellij.openapi.components.Storage;
+import com.intellij.openapi.project.Project;
+
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Persistent storage for project-specific settings.
+ * @author marhali
+ */
+@State(
+        name = "ProjectSettingsService",
+        storages = @Storage("easy-i18n.xml")
+)
+public class ProjectSettingsService implements PersistentStateComponent<ProjectSettingsState> {
+
+    public static @NotNull ProjectSettingsService get(@NotNull Project project) {
+        return project.getService(ProjectSettingsService.class);
+    }
+
+    private ProjectSettingsState state;
+
+    public ProjectSettingsService() {
+        this.state = new ProjectSettingsState();
+    }
+
+    /**
+     * Sets the provided configuration and invalidates the merged state.
+     * @param state New configuration
+     */
+    protected void setState(@NotNull ProjectSettingsState state) {
+        this.state = state;
+    }
+
+    @Override
+    public @NotNull ProjectSettingsState getState() {
+        return state;
+    }
+
+    @Override
+    public void loadState(@NotNull ProjectSettingsState state) {
+        this.state = state;
+    }
+}

src/main/java/de/marhali/easyi18n/settings/ProjectSettingsState.java

@@ -0,0 +1,168 @@
+package de.marhali.easyi18n.settings;
+
+import de.marhali.easyi18n.io.parser.ParserStrategyType;
+import de.marhali.easyi18n.io.folder.FolderStrategyType;
+import de.marhali.easyi18n.settings.presets.DefaultPreset;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Represents the project-specific configuration of this plugin.
+ * @author marhali
+ */
+public class ProjectSettingsState implements ProjectSettings {
+
+    private static final ProjectSettings defaults = new DefaultPreset();
+
+    // Resource Configuration
+    private String localesDirectory;
+    private FolderStrategyType folderStrategy;
+    private ParserStrategyType parserStrategy;
+    private String filePattern;
+
+    private Boolean sorting;
+
+    // Editor configuration
+    private String namespaceDelimiter;
+    private String sectionDelimiter;
+    private String contextDelimiter;
+    private String pluralDelimiter;
+    private String defaultNamespace;
+    private String previewLocale;
+
+    private Boolean nestedKeys;
+    private Boolean assistance;
+
+    // Experimental configuration
+    private Boolean alwaysFold;
+
+    public ProjectSettingsState() {}
+
+    @Override
+    public @Nullable String getLocalesDirectory() {
+        return localesDirectory != null ? localesDirectory : defaults.getLocalesDirectory();
+    }
+
+    @Override
+    public @NotNull FolderStrategyType getFolderStrategy() {
+        return folderStrategy != null ? folderStrategy : defaults.getFolderStrategy();
+    }
+
+    @Override
+    public @NotNull ParserStrategyType getParserStrategy() {
+        return parserStrategy != null ? parserStrategy : defaults.getParserStrategy();
+    }
+
+    @Override
+    public @NotNull String getFilePattern() {
+        return filePattern != null ? filePattern : defaults.getFilePattern();
+    }
+
+    @Override
+    public boolean isSorting() {
+        return sorting != null ? sorting : defaults.isSorting();
+    }
+
+    @Override
+    public @Nullable String getNamespaceDelimiter() {
+        return namespaceDelimiter != null ? namespaceDelimiter : defaults.getNamespaceDelimiter();
+    }
+
+    @Override
+    public @NotNull String getSectionDelimiter() {
+        return sectionDelimiter != null ? sectionDelimiter : defaults.getSectionDelimiter();
+    }
+
+    @Override
+    public @Nullable String getContextDelimiter() {
+        return contextDelimiter != null ? contextDelimiter : defaults.getContextDelimiter();
+    }
+
+    @Override
+    public @Nullable String getPluralDelimiter() {
+        return pluralDelimiter != null ? pluralDelimiter : defaults.getPluralDelimiter();
+    }
+
+    @Nullable
+    @Override
+    public String getDefaultNamespace() {
+        return defaultNamespace;
+    }
+
+    @Override
+    public @NotNull String getPreviewLocale() {
+        return previewLocale != null ? previewLocale : defaults.getPreviewLocale();
+    }
+
+    @Override
+    public boolean isNestedKeys() {
+        return nestedKeys != null ? nestedKeys : defaults.isNestedKeys();
+    }
+
+    @Override
+    public boolean isAssistance() {
+        return assistance != null ? assistance : defaults.isAssistance();
+    }
+
+    @Override
+    public boolean isAlwaysFold() {
+        return alwaysFold != null ? alwaysFold : defaults.isAlwaysFold();
+    }
+
+    public void setLocalesDirectory(String localesDirectory) {
+        this.localesDirectory = localesDirectory;
+    }
+
+    public void setFolderStrategy(FolderStrategyType folderStrategy) {
+        this.folderStrategy = folderStrategy;
+    }
+
+    public void setParserStrategy(ParserStrategyType parserStrategy) {
+        this.parserStrategy = parserStrategy;
+    }
+
+    public void setFilePattern(String filePattern) {
+        this.filePattern = filePattern;
+    }
+
+    public void setSorting(Boolean sorting) {
+        this.sorting = sorting;
+    }
+
+    public void setNamespaceDelimiter(String namespaceDelimiter) {
+        this.namespaceDelimiter = namespaceDelimiter;
+    }
+
+    public void setSectionDelimiter(String sectionDelimiter) {
+        this.sectionDelimiter = sectionDelimiter;
+    }
+
+    public void setContextDelimiter(String contextDelimiter) {
+        this.contextDelimiter = contextDelimiter;
+    }
+
+    public void setPluralDelimiter(String pluralDelimiter) {
+        this.pluralDelimiter = pluralDelimiter;
+    }
+
+    public void setDefaultNamespace(String defaultNamespace) {
+        this.defaultNamespace = defaultNamespace;
+    }
+
+    public void setPreviewLocale(String previewLocale) {
+        this.previewLocale = previewLocale;
+    }
+
+    public void setNestedKeys(Boolean nestedKeys) {
+        this.nestedKeys = nestedKeys;
+    }
+
+    public void setAssistance(Boolean assistance) {
+        this.assistance = assistance;
+    }
+
+    public void setAlwaysFold(Boolean alwaysFold) {
+        this.alwaysFold = alwaysFold;
+    }
+}

src/main/java/de/marhali/easyi18n/settings/presets/DefaultPreset.java

@@ -0,0 +1,84 @@
+package de.marhali.easyi18n.settings.presets;
+
+import de.marhali.easyi18n.io.parser.ParserStrategyType;
+import de.marhali.easyi18n.io.folder.FolderStrategyType;
+import de.marhali.easyi18n.settings.ProjectSettings;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Default preset. Used if none has been defined.
+ * @author marhali
+ */
+public class DefaultPreset implements ProjectSettings {
+    @Override
+    public String getLocalesDirectory() {
+        return null;
+    }
+
+    @Override
+    public @NotNull FolderStrategyType getFolderStrategy() {
+        return FolderStrategyType.SINGLE;
+    }
+
+    @Override
+    public @NotNull ParserStrategyType getParserStrategy() {
+        return ParserStrategyType.JSON;
+    }
+
+    @Override
+    public @NotNull String getFilePattern() {
+        return "*.*";
+    }
+
+    @Override
+    public boolean isSorting() {
+        return true;
+    }
+
+    @Override
+    public String getNamespaceDelimiter() {
+        return ":";
+    }
+
+    @Override
+    public @NotNull String getSectionDelimiter() {
+        return ".";
+    }
+
+    @Override
+    public String getContextDelimiter() {
+        return "_";
+    }
+
+    @Override
+    public String getPluralDelimiter() {
+        return "_";
+    }
+
+    @Override
+    public @Nullable String getDefaultNamespace() {
+        return null;
+    }
+
+    @Override
+    public @NotNull String getPreviewLocale() {
+        return "en";
+    }
+
+    @Override
+    public boolean isNestedKeys() {
+        return true;
+    }
+
+    @Override
+    public boolean isAssistance() {
+        return true;
+    }
+
+    @Override
+    public boolean isAlwaysFold() {
+        return false;
+    }
+}

src/main/java/de/marhali/easyi18n/settings/presets/Preset.java

@@ -0,0 +1,33 @@
+package de.marhali.easyi18n.settings.presets;
+
+import de.marhali.easyi18n.settings.ProjectSettings;
+
+/**
+ * Enumeration of all available configuration presets.
+ * Every preset needs to be registered here to be properly recognized.
+ * @author marhali
+ */
+public enum Preset {
+    DEFAULT(DefaultPreset.class),
+    VUE_I18N(VueI18nPreset.class),
+    REACT_I18NEXT(ReactI18NextPreset.class);
+
+    private final Class<? extends ProjectSettings> clazz;
+
+    Preset(Class<? extends ProjectSettings> clazz) {
+        this.clazz = clazz;
+    }
+
+    public ProjectSettings config() {
+        try {
+            return this.clazz.getDeclaredConstructor().newInstance();
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    @Override
+    public String toString() {
+        return super.name().toLowerCase();
+    }
+}

src/main/java/de/marhali/easyi18n/settings/presets/ReactI18NextPreset.java

@@ -0,0 +1,84 @@
+package de.marhali.easyi18n.settings.presets;
+
+import de.marhali.easyi18n.io.parser.ParserStrategyType;
+import de.marhali.easyi18n.io.folder.FolderStrategyType;
+import de.marhali.easyi18n.settings.ProjectSettings;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Preset for React - i18n-next
+ * @author marhali
+ */
+public class ReactI18NextPreset implements ProjectSettings {
+    @Override
+    public @Nullable String getLocalesDirectory() {
+        return null;
+    }
+
+    @Override
+    public @NotNull FolderStrategyType getFolderStrategy() {
+        return FolderStrategyType.MODULARIZED_NAMESPACE;
+    }
+
+    @Override
+    public @NotNull ParserStrategyType getParserStrategy() {
+        return ParserStrategyType.JSON;
+    }
+
+    @Override
+    public @NotNull String getFilePattern() {
+        return "*.json";
+    }
+
+    @Override
+    public boolean isSorting() {
+        return true;
+    }
+
+    @Override
+    public @Nullable String getNamespaceDelimiter() {
+        return ":";
+    }
+
+    @Override
+    public @NotNull String getSectionDelimiter() {
+        return ".";
+    }
+
+    @Override
+    public @Nullable String getContextDelimiter() {
+        return "_";
+    }
+
+    @Override
+    public @Nullable String getPluralDelimiter() {
+        return "_";
+    }
+
+    @Override
+    public @Nullable String getDefaultNamespace() {
+        return "common";
+    }
+
+    @Override
+    public @NotNull String getPreviewLocale() {
+        return "en";
+    }
+
+    @Override
+    public boolean isNestedKeys() {
+        return false;
+    }
+
+    @Override
+    public boolean isAssistance() {
+        return true;
+    }
+
+    @Override
+    public boolean isAlwaysFold() {
+        return false;
+    }
+}

src/main/java/de/marhali/easyi18n/settings/presets/VueI18nPreset.java

@@ -0,0 +1,83 @@
+package de.marhali.easyi18n.settings.presets;
+
+import de.marhali.easyi18n.io.parser.ParserStrategyType;
+import de.marhali.easyi18n.io.folder.FolderStrategyType;
+import de.marhali.easyi18n.settings.ProjectSettings;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Preset for Vue.js - vue-i18n
+ * @author marhali
+ */
+public class VueI18nPreset implements ProjectSettings {
+    @Override
+    public @Nullable String getLocalesDirectory() {
+        return null;
+    }
+
+    @Override
+    public @NotNull FolderStrategyType getFolderStrategy() {
+        return FolderStrategyType.SINGLE;
+    }
+
+    @Override
+    public @NotNull ParserStrategyType getParserStrategy() {
+        return ParserStrategyType.JSON;
+    }
+
+    @Override
+    public @NotNull String getFilePattern() {
+        return "*.json";
+    }
+
+    @Override
+    public boolean isSorting() {
+        return true;
+    }
+
+    @Override
+    public @Nullable String getNamespaceDelimiter() {
+        return null;
+    }
+
+    @Override
+    public @NotNull String getSectionDelimiter() {
+        return ".";
+    }
+
+    @Override
+    public @Nullable String getContextDelimiter() {
+        return null;
+    }
+
+    @Override
+    public @Nullable String getPluralDelimiter() {
+        return null;
+    }
+
+    @Override
+    public @Nullable String getDefaultNamespace() {
+        return null;
+    }
+
+    @Override
+    public @NotNull String getPreviewLocale() {
+        return "en";
+    }
+
+    @Override
+    public boolean isNestedKeys() {
+        return true;
+    }
+
+    @Override
+    public boolean isAssistance() {
+        return true;
+    }
+
+    @Override
+    public boolean isAlwaysFold() {
+        return false;
+    }
+}

src/main/java/de/marhali/easyi18n/tabs/TableView.java

@@ -5,14 +5,19 @@ import com.intellij.ui.components.JBScrollPane;
 import com.intellij.ui.table.JBTable;
 
 import de.marhali.easyi18n.InstanceManager;
-import de.marhali.easyi18n.listener.ReturnKeyListener;
-import de.marhali.easyi18n.model.*;
 import de.marhali.easyi18n.dialog.EditDialog;
+import de.marhali.easyi18n.listener.ReturnKeyListener;
 import de.marhali.easyi18n.listener.DeleteKeyListener;
 import de.marhali.easyi18n.listener.PopupClickListener;
+import de.marhali.easyi18n.model.TranslationData;
+import de.marhali.easyi18n.model.action.TranslationDelete;
 import de.marhali.easyi18n.model.bus.BusListener;
+import de.marhali.easyi18n.model.KeyPath;
+import de.marhali.easyi18n.model.Translation;
+import de.marhali.easyi18n.model.TranslationValue;
 import de.marhali.easyi18n.renderer.TableRenderer;
 import de.marhali.easyi18n.tabs.mapper.TableModelMapper;
+import de.marhali.easyi18n.util.KeyPathConverter;
 
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -56,20 +61,20 @@ public class TableView implements BusListener {
             return;
         }
 
-        KeyPath fullPath = this.converter.split(String.valueOf(this.table.getValueAt(row, 0)));
-        Translation translation = InstanceManager.get(project).store().getData().getTranslation(fullPath);
+        KeyPath fullPath = this.converter.fromString(String.valueOf(this.table.getValueAt(row, 0)));
+        TranslationValue value = InstanceManager.get(project).store().getData().getTranslation(fullPath);
 
-        if (translation != null) {
-            new EditDialog(project, new KeyedTranslation(fullPath, translation)).showAndHandle();
+        if (value != null) {
+            new EditDialog(project, new Translation(fullPath, value)).showAndHandle();
         }
     }
 
     private void deleteSelectedRows() {
         for (int selectedRow : table.getSelectedRows()) {
-            KeyPath fullPath = this.converter.split(String.valueOf(table.getValueAt(selectedRow, 0)));
+            KeyPath fullPath = this.converter.fromString(String.valueOf(table.getValueAt(selectedRow, 0)));
 
             InstanceManager.get(project).processUpdate(
-                    new TranslationDelete(new KeyedTranslation(fullPath, null))
+                    new TranslationDelete(new Translation(fullPath, null))
             );
         }
     }
@@ -84,7 +89,7 @@ public class TableView implements BusListener {
 
     @Override
     public void onFocusKey(@NotNull KeyPath key) {
-        String concatKey = this.converter.concat(key);
+        String concatKey = this.converter.toString(key);
         int row = -1;
 
         for (int i = 0; i < table.getRowCount(); i++) {

src/main/java/de/marhali/easyi18n/tabs/TreeView.java

@@ -9,16 +9,20 @@ import com.intellij.ui.components.JBScrollPane;
 import com.intellij.ui.treeStructure.Tree;
 
 import de.marhali.easyi18n.InstanceManager;
+import de.marhali.easyi18n.dialog.EditDialog;
 import de.marhali.easyi18n.listener.ReturnKeyListener;
-import de.marhali.easyi18n.model.*;
+import de.marhali.easyi18n.model.TranslationData;
+import de.marhali.easyi18n.model.action.TranslationDelete;
 import de.marhali.easyi18n.model.bus.BusListener;
 import de.marhali.easyi18n.action.treeview.CollapseTreeViewAction;
 import de.marhali.easyi18n.action.treeview.ExpandTreeViewAction;
-import de.marhali.easyi18n.dialog.EditDialog;
 import de.marhali.easyi18n.listener.DeleteKeyListener;
 import de.marhali.easyi18n.listener.PopupClickListener;
+import de.marhali.easyi18n.model.KeyPath;
+import de.marhali.easyi18n.model.Translation;
+import de.marhali.easyi18n.model.TranslationValue;
 import de.marhali.easyi18n.renderer.TreeRenderer;
-import de.marhali.easyi18n.service.SettingsService;
+import de.marhali.easyi18n.settings.ProjectSettingsService;
 import de.marhali.easyi18n.tabs.mapper.TreeModelMapper;
 import de.marhali.easyi18n.util.TreeUtil;
 
@@ -28,6 +32,8 @@ import org.jetbrains.annotations.Nullable;
 import javax.swing.*;
 import javax.swing.tree.DefaultMutableTreeNode;
 import javax.swing.tree.TreePath;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.ResourceBundle;
 
 /**
@@ -80,7 +86,21 @@ public class TreeView implements BusListener {
 
     @Override
     public void onUpdateData(@NotNull TranslationData data) {
-        tree.setModel(this.currentMapper = new TreeModelMapper(data, SettingsService.getInstance(project).getState()));
+        List<Integer> expanded = getExpandedRows();
+        tree.setModel(this.currentMapper = new TreeModelMapper(data, ProjectSettingsService.get(project).getState()));
+        expanded.forEach(tree::expandRow);
+    }
+
+    private List<Integer> getExpandedRows() {
+        List<Integer> expanded = new ArrayList<>();
+
+        for(int i = 0; i < tree.getRowCount(); i++) {
+            if(tree.isExpanded(i)) {
+                expanded.add(i);
+            }
+        }
+
+        return expanded;
     }
 
     @Override
@@ -127,13 +147,13 @@ public class TreeView implements BusListener {
         }
 
         KeyPath fullPath = TreeUtil.getFullPath(path);
-        Translation translation = InstanceManager.get(project).store().getData().getTranslation(fullPath);
+        TranslationValue value = InstanceManager.get(project).store().getData().getTranslation(fullPath);
 
-        if (translation == null) {
+        if (value == null) {
             return;
         }
 
-        new EditDialog(project, new KeyedTranslation(fullPath, translation)).showAndHandle();
+        new EditDialog(project, new Translation(fullPath, value)).showAndHandle();
     }
 
     private void deleteSelectedNodes() {
@@ -147,7 +167,7 @@ public class TreeView implements BusListener {
             KeyPath fullPath = TreeUtil.getFullPath(path);
 
             InstanceManager.get(project).processUpdate(
-                    new TranslationDelete(new KeyedTranslation(fullPath, null))
+                    new TranslationDelete(new Translation(fullPath, null))
             );
         }
     }

src/main/java/de/marhali/easyi18n/tabs/mapper/TableModelMapper.java

@@ -1,8 +1,13 @@
 package de.marhali.easyi18n.tabs.mapper;
 
-import de.marhali.easyi18n.model.*;
+import de.marhali.easyi18n.model.TranslationData;
+import de.marhali.easyi18n.model.action.TranslationUpdate;
 import de.marhali.easyi18n.model.bus.FilterMissingTranslationsListener;
 import de.marhali.easyi18n.model.bus.SearchQueryListener;
+import de.marhali.easyi18n.model.KeyPath;
+import de.marhali.easyi18n.model.Translation;
+import de.marhali.easyi18n.model.TranslationValue;
+import de.marhali.easyi18n.util.KeyPathConverter;
 
 import org.jetbrains.annotations.Nls;
 import org.jetbrains.annotations.NotNull;
@@ -50,10 +55,10 @@ public class TableModelMapper implements TableModel, SearchQueryListener, Filter
         List<KeyPath> matches = new ArrayList<>();
 
         for(KeyPath key : this.data.getFullKeys()) {
-            if(this.converter.concat(key).toLowerCase().contains(query)) {
+            if(this.converter.toString(key).toLowerCase().contains(query)) {
                 matches.add(key);
             } else {
-                for(String content : this.data.getTranslation(key).values()) {
+                for(String content : this.data.getTranslation(key).getLocaleContents()) {
                     if(content.toLowerCase().contains(query)) {
                         matches.add(key);
                     }
@@ -74,7 +79,7 @@ public class TableModelMapper implements TableModel, SearchQueryListener, Filter
         List<KeyPath> matches = new ArrayList<>();
 
         for(KeyPath key : this.data.getFullKeys()) {
-            if(this.data.getTranslation(key).values().size() != this.locales.size()) {
+            if(this.data.getTranslation(key).getLocaleContents().size() != this.locales.size()) {
                 matches.add(key);
             }
         }
@@ -117,25 +122,25 @@ public class TableModelMapper implements TableModel, SearchQueryListener, Filter
         KeyPath key = this.fullKeys.get(rowIndex);
 
         if(columnIndex == 0) { // Keys
-            return this.converter.concat(key);
+            return this.converter.toString(key);
         }
 
         String locale = this.locales.get(columnIndex -  1);
-        Translation translation = this.data.getTranslation(key);
+        TranslationValue value = this.data.getTranslation(key);
 
-        return translation == null ? null : translation.get(locale);
+        return value == null ? null : value.get(locale);
     }
 
     @Override
     public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
         KeyPath key = this.fullKeys.get(rowIndex);
-        Translation translation = this.data.getTranslation(key);
+        TranslationValue translation = this.data.getTranslation(key);
 
         if(translation == null) { // Unknown cell
             return;
         }
 
-        KeyPath newKey = columnIndex == 0 ? this.converter.split(String.valueOf(aValue)) : key;
+        KeyPath newKey = columnIndex == 0 ? this.converter.fromString(String.valueOf(aValue)) : key;
 
         // Translation content update
         if(columnIndex > 0) {
@@ -146,8 +151,8 @@ public class TableModelMapper implements TableModel, SearchQueryListener, Filter
             }
         }
 
-        TranslationUpdate update = new TranslationUpdate(new KeyedTranslation(key, translation),
-                new KeyedTranslation(newKey, translation));
+        TranslationUpdate update = new TranslationUpdate(new Translation(key, translation),
+                new Translation(newKey, translation));
 
         this.updater.accept(update);
     }

src/main/java/de/marhali/easyi18n/tabs/mapper/TreeModelMapper.java

@@ -3,9 +3,14 @@ package de.marhali.easyi18n.tabs.mapper;
 import com.intellij.ide.projectView.PresentationData;
 import com.intellij.ui.JBColor;
 
-import de.marhali.easyi18n.model.*;
+import de.marhali.easyi18n.model.TranslationData;
+import de.marhali.easyi18n.model.TranslationNode;
 import de.marhali.easyi18n.model.bus.FilterMissingTranslationsListener;
 import de.marhali.easyi18n.model.bus.SearchQueryListener;
+import de.marhali.easyi18n.model.KeyPath;
+import de.marhali.easyi18n.model.TranslationValue;
+import de.marhali.easyi18n.settings.ProjectSettings;
+import de.marhali.easyi18n.util.KeyPathConverter;
 import de.marhali.easyi18n.util.UiUtil;
 
 import org.jetbrains.annotations.NotNull;
@@ -24,13 +29,13 @@ public class TreeModelMapper extends DefaultTreeModel implements SearchQueryList
 
     private final TranslationData data;
     private final KeyPathConverter converter;
-    private final SettingsState state;
+    private final ProjectSettings state;
 
-    public TreeModelMapper(TranslationData data, SettingsState state) {
+    public TreeModelMapper(TranslationData data, ProjectSettings state) {
         super(null);
 
         this.data = data;
-        this.converter = new KeyPathConverter(state.isNestedKeys());
+        this.converter = new KeyPathConverter(state);
         this.state = state;
 
         DefaultMutableTreeNode rootNode = new DefaultMutableTreeNode();
@@ -41,7 +46,7 @@ public class TreeModelMapper extends DefaultTreeModel implements SearchQueryList
     @Override
     public void onSearchQuery(@Nullable String query) {
         DefaultMutableTreeNode rootNode = new DefaultMutableTreeNode();
-        TranslationData shadow = new TranslationData(this.state.isSortKeys());
+        TranslationData shadow = new TranslationData(this.state.isSorting());
 
         if(query == null) { // Reset
             this.generateNodes(rootNode, this.data.getRootNode());
@@ -52,15 +57,15 @@ public class TreeModelMapper extends DefaultTreeModel implements SearchQueryList
         query = query.toLowerCase();
 
         for(KeyPath currentKey : this.data.getFullKeys()) {
-            Translation translation = this.data.getTranslation(currentKey);
-            String loweredKey = this.converter.concat(currentKey).toLowerCase();
+            TranslationValue translation = this.data.getTranslation(currentKey);
+            String loweredKey = this.converter.toString(currentKey).toLowerCase();
 
             if(query.contains(loweredKey) || loweredKey.contains(query)) {
                 shadow.setTranslation(currentKey, translation);
                 continue;
             }
 
-            for(String currentContent : translation.values()) {
+            for(String currentContent : translation.getLocaleContents()) {
                 if(currentContent.toLowerCase().contains(query)) {
                     shadow.setTranslation(currentKey, translation);
                     break;
@@ -75,7 +80,7 @@ public class TreeModelMapper extends DefaultTreeModel implements SearchQueryList
     @Override
     public void onFilterMissingTranslations(boolean filter) {
         DefaultMutableTreeNode rootNode = new DefaultMutableTreeNode();
-        TranslationData shadow = new TranslationData(this.state.isSortKeys());
+        TranslationData shadow = new TranslationData(this.state.isSorting());
 
         if(!filter) { // Reset
             this.generateNodes(rootNode, this.data.getRootNode());
@@ -84,9 +89,9 @@ public class TreeModelMapper extends DefaultTreeModel implements SearchQueryList
         }
 
         for(KeyPath currentKey : this.data.getFullKeys()) {
-            Translation translation = this.data.getTranslation(currentKey);
+            TranslationValue translation = this.data.getTranslation(currentKey);
 
-            if(translation.values().size() != this.data.getLocales().size()) {
+            if(translation.getLocaleContents().size() != this.data.getLocales().size()) {
                 shadow.setTranslation(currentKey, translation);
             }
         }
@@ -124,7 +129,7 @@ public class TreeModelMapper extends DefaultTreeModel implements SearchQueryList
             } else {
                 String previewLocale = this.state.getPreviewLocale();
                 String sub = "(" + previewLocale + ": " + childTranslationNode.getValue().get(previewLocale) + ")";
-                String tooltip = UiUtil.generateHtmlTooltip(childTranslationNode.getValue());
+                String tooltip = UiUtil.generateHtmlTooltip(childTranslationNode.getValue().getEntries());
 
                 PresentationData data = new PresentationData(key, sub, null, null);
                 data.setTooltip(tooltip);

src/main/java/de/marhali/easyi18n/util/KeyPathConverter.java

@@ -0,0 +1,159 @@
+package de.marhali.easyi18n.util;
+
+import com.intellij.openapi.project.Project;
+
+import de.marhali.easyi18n.model.KeyPath;
+import de.marhali.easyi18n.settings.ProjectSettings;
+import de.marhali.easyi18n.settings.ProjectSettingsService;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Objects;
+import java.util.regex.Pattern;
+
+/**
+ * Stateful utility to transform absolute translation keys into their character literal representation and backwards.
+ * @author marhali
+ */
+public class KeyPathConverter {
+
+    private final ProjectSettings settings;
+
+    /**
+     * Constructs a new converter instance
+     * @param settings Delimiter configuration
+     */
+    public KeyPathConverter(@NotNull ProjectSettings settings) {
+        this.settings = settings;
+    }
+
+    /**
+     * @see #KeyPathConverter(ProjectSettings)
+     * @param project Opened project
+     */
+    public KeyPathConverter(@NotNull Project project) {
+        this(ProjectSettingsService.get(project).getState());
+    }
+
+    /**
+     * Transform to character literal representation
+     * @param path Absolute key path
+     * @return Character literal
+     */
+    public @NotNull String toString(@NotNull KeyPath path) {
+        StringBuilder builder = new StringBuilder();
+
+        for(int i = 0; i < path.size(); i++) {
+            if(i > 0) { // Delimiters
+                if(i == 1 && settings.getFolderStrategy().isNamespaceMode() && settings.getNamespaceDelimiter() != null) {
+                    builder.append(quoteDelimiter(settings.getNamespaceDelimiter()));
+                } else {
+                    builder.append(quoteDelimiter(settings.getSectionDelimiter()));
+                }
+            }
+
+            // Section content
+            builder.append(quoteSection(path.get(i)));
+        }
+
+        return builder.toString();
+    }
+
+    /**
+     * Splits provided character literal into key path sections.
+     * If namespace mode is activated and none was provided, the default namespace will be added.
+     * @return Layered key path sections
+     */
+    public @NotNull KeyPath fromString(@NotNull String literalPath) {
+        KeyPath path = new KeyPath();
+
+        int i = 0;
+        for(String section : literalPath.split(getSplitRegex())) {
+
+            // Missing namespace
+            if(i == 0 && settings.getFolderStrategy().isNamespaceMode() && hasDefaultNamespace()) {
+                String namespaceDelim = (settings.isNestedKeys() ? "" : "\\") + settings.getNamespaceDelimiter();
+                if(section.length() == literalPath.length() || !literalPath.substring(section.length()).startsWith(namespaceDelim)) {
+                    path.add(settings.getDefaultNamespace());
+                }
+            }
+
+            path.add(unquoteSection(section));
+
+            i++;
+        }
+
+        return path;
+    }
+
+    @Override
+    public String toString() {
+        return "KeyPathConverter{" +
+                "settings=" + settings +
+                '}';
+    }
+
+    /*
+     * INTERNAL METHODS
+     */
+
+    private boolean hasDefaultNamespace() {
+        return settings.getDefaultNamespace() != null && !settings.getDefaultNamespace().isEmpty();
+    }
+
+    private String getSplitRegex() {
+       return settings.isNestedKeys()
+                ? ("(?<!" + Pattern.quote("\\") + ")" + getSplitCharsRegex())
+                : Pattern.quote("\\") + getSplitCharsRegex();
+    }
+
+    private String getSplitCharsRegex() {
+        StringBuilder builder = new StringBuilder();
+
+        builder.append("(");
+        builder.append(Pattern.quote(settings.getSectionDelimiter()));
+
+        // Add optional namespace delimiter if present
+        if(settings.getNamespaceDelimiter() != null && !settings.getNamespaceDelimiter().isEmpty()) {
+            builder.append("|");
+            builder.append(Pattern.quote(Objects.requireNonNull(settings.getNamespaceDelimiter())));
+        }
+
+        builder.append(")");
+        return builder.toString();
+    }
+
+    /**
+     * Securely escape found delimiters inside provided section according to the configured policy.
+     */
+    private String quoteSection(String section) {
+        String quoted = section;
+        if(!settings.isNestedKeys()) {
+            return quoted;
+        }
+
+        if(hasDefaultNamespace()) {
+            quoted = quoted.replace(settings.getNamespaceDelimiter(), "\\" + settings.getNamespaceDelimiter());
+        }
+
+        quoted = quoted.replace(settings.getSectionDelimiter(), "\\" + settings.getSectionDelimiter());
+        return quoted;
+    }
+
+    private String unquoteSection(String section) {
+        String unquoted = section;
+        if(hasDefaultNamespace()) {
+            unquoted = unquoted.replace("\\" + settings.getNamespaceDelimiter(), settings.getNamespaceDelimiter());
+        }
+
+        unquoted = unquoted.replace("\\" + settings.getSectionDelimiter(), settings.getSectionDelimiter());
+        return unquoted;
+    }
+
+    /**
+     * Securely escape provided delimiter according to the configured policy.
+     */
+    private String quoteDelimiter(String delimiter) {
+        return settings.isNestedKeys() ? delimiter :  delimiter.replace(delimiter, "\\" + delimiter);
+    }
+}

src/main/java/de/marhali/easyi18n/util/NotificationHelper.java

@@ -5,7 +5,7 @@ import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.project.Project;
 import de.marhali.easyi18n.action.SettingsAction;
 import de.marhali.easyi18n.io.IOHandler;
-import de.marhali.easyi18n.model.SettingsState;
+import de.marhali.easyi18n.settings.ProjectSettings;
 import org.jetbrains.annotations.NotNull;
 
 import java.text.MessageFormat;
@@ -17,11 +17,11 @@ import java.util.ResourceBundle;
  */
 public class NotificationHelper {
 
-    public static void createIOError(@NotNull SettingsState state, Exception ex) {
+    public static void createIOError(@NotNull ProjectSettings state, Exception ex) {
         ResourceBundle bundle = ResourceBundle.getBundle("messages");
 
         String message = MessageFormat.format(bundle.getString("error.io"),
-                state.getFolderStrategy(), state.getParserStrategy(), state.getFilePattern(), state.getLocalesPath());
+                state.getFolderStrategy(), state.getParserStrategy(), state.getFilePattern(), state.getLocalesDirectory());
 
         Logger.getInstance(IOHandler.class).error(message, ex);
     }

src/main/java/de/marhali/easyi18n/util/UiUtil.java

@@ -1,6 +1,7 @@
 package de.marhali.easyi18n.util;
 
 import java.util.Map;
+import java.util.Set;
 
 /**
  * User interface utilities.
@@ -13,12 +14,12 @@ public class UiUtil {
      * @param messages Contains locales with desired translation
      * @return String with html format
      */
-    public static String generateHtmlTooltip(Map<String, String> messages) {
+    public static String generateHtmlTooltip(Set<Map.Entry<String, String>> messages) {
         StringBuilder builder = new StringBuilder();
 
         builder.append("<html>");
 
-        for(Map.Entry<String, String> entry : messages.entrySet()) {
+        for(Map.Entry<String, String> entry : messages) {
             builder.append("<b>");
             builder.append(entry.getKey()).append(":");
             builder.append("</b> ");

src/main/resources/META-INF/de.marhali.easyi18n-java.xml

@@ -1,5 +1,27 @@
 <idea-plugin>
     <extensions defaultExtensionNs="com.intellij">
-        <lang.foldingBuilder language="JAVA" implementationClass="de.marhali.easyi18n.editor.generic.GenericFoldingBuilder" />
+        <intentionAction>
+            <className>de.marhali.easyi18n.assistance.intention.JavaTranslationIntention</className>
+        </intentionAction>
+
+        <psi.referenceContributor
+                language="JAVA"
+                implementation="de.marhali.easyi18n.assistance.reference.JavaKeyReferenceContributor"
+        />
+
+        <lang.foldingBuilder
+                language="JAVA"
+                implementationClass="de.marhali.easyi18n.assistance.folding.JavaFoldingBuilder"
+        />
+
+        <lang.documentationProvider
+                language="JAVA"
+                implementationClass="de.marhali.easyi18n.assistance.documentation.CommonDocumentationProvider"
+        />
+
+        <completion.contributor
+                language="JAVA"
+                implementationClass="de.marhali.easyi18n.assistance.completion.JavaCompletionContributor"
+        />
     </extensions>
 </idea-plugin>

src/main/resources/META-INF/de.marhali.easyi18n-javascript.xml

@@ -1,6 +1,45 @@
 <idea-plugin>
     <extensions defaultExtensionNs="com.intellij">
-        <lang.foldingBuilder language="JavaScript" implementationClass="de.marhali.easyi18n.editor.generic.GenericFoldingBuilder" />
-        <lang.foldingBuilder language="TypeScript" implementationClass="de.marhali.easyi18n.editor.generic.GenericFoldingBuilder" />
+        <psi.referenceContributor
+                language="JavaScript"
+                implementation="de.marhali.easyi18n.assistance.reference.JsKeyReferenceContributor"
+        />
+
+        <lang.documentationProvider
+                language="JavaScript"
+                implementationClass="de.marhali.easyi18n.assistance.documentation.CommonDocumentationProvider"
+        />
+
+        <!-- JavaScript plugin also includes TypeScript -->
+        <lang.documentationProvider
+                language="TypeScript"
+                implementationClass="de.marhali.easyi18n.assistance.documentation.CommonDocumentationProvider"
+        />
+
+        <!-- JavaScript plugin also includes TypeScript -->
+        <lang.foldingBuilder
+                language="TypeScript"
+                implementationClass="de.marhali.easyi18n.assistance.folding.JsFoldingBuilder"
+        />
+
+        <!-- JavaScript plugin also includes TypeScript JSX -->
+        <lang.foldingBuilder
+                language="TypeScript JSX"
+                implementationClass="de.marhali.easyi18n.assistance.folding.JsFoldingBuilder"
+        />
+
+        <lang.foldingBuilder
+                language="JavaScript"
+                implementationClass="de.marhali.easyi18n.assistance.folding.JsFoldingBuilder"
+        />
+
+        <intentionAction>
+            <className>de.marhali.easyi18n.assistance.intention.JsTranslationIntention</className>
+        </intentionAction>
+
+        <completion.contributor
+                language="JavaScript"
+                implementationClass="de.marhali.easyi18n.assistance.completion.JsCompletionContributor"
+        />
     </extensions>
 </idea-plugin>

src/main/resources/META-INF/de.marhali.easyi18n-kotlin.xml

@@ -1,11 +1,27 @@
 <idea-plugin>
     <extensions defaultExtensionNs="com.intellij">
-        <annotator language="kotlin" implementationClass="de.marhali.easyi18n.editor.kotlin.KotlinKeyAnnotator" />
+        <intentionAction>
+            <className>de.marhali.easyi18n.assistance.intention.KtTranslationIntention</className>
+        </intentionAction>
 
-        <completion.contributor language="kotlin"
-                                implementationClass="de.marhali.easyi18n.editor.kotlin.KotlinKeyCompletionContributor" />
+        <psi.referenceContributor
+                language="kotlin"
+                implementation="de.marhali.easyi18n.assistance.reference.KtKeyReferenceContributor"
+        />
 
-        <psi.referenceContributor language="kotlin"
-                                  implementation="de.marhali.easyi18n.editor.kotlin.KotlinKeyReferenceContributor" />
+        <lang.documentationProvider
+                language="kotlin"
+                implementationClass="de.marhali.easyi18n.assistance.documentation.CommonDocumentationProvider"
+        />
+
+        <completion.contributor
+                language="kotlin"
+                implementationClass="de.marhali.easyi18n.assistance.completion.KtCompletionContributor"
+        />
+
+        <lang.foldingBuilder
+                language="kotlin"
+                implementationClass="de.marhali.easyi18n.assistance.folding.KtFoldingBuilder"
+        />
     </extensions>
 </idea-plugin>

src/main/resources/META-INF/de.marhali.easyi18n-php.xml

@@ -0,0 +1,27 @@
+<idea-plugin>
+    <extensions defaultExtensionNs="com.intellij">
+        <intentionAction>
+            <className>de.marhali.easyi18n.assistance.intention.PhpTranslationIntention</className>
+        </intentionAction>
+
+        <psi.referenceContributor
+                language="PHP"
+                implementation="de.marhali.easyi18n.assistance.reference.PhpKeyReferenceContributor"
+        />
+
+        <lang.foldingBuilder
+                language="PHP"
+                implementationClass="de.marhali.easyi18n.assistance.folding.PhpFoldingBuilder"
+        />
+
+        <lang.documentationProvider
+                language="PHP"
+                implementationClass="de.marhali.easyi18n.assistance.documentation.CommonDocumentationProvider"
+        />
+
+        <completion.contributor
+                language="PHP"
+                implementationClass="de.marhali.easyi18n.assistance.completion.PhpCompletionContributor"
+        />
+    </extensions>
+</idea-plugin>

src/main/resources/META-INF/de.marhali.easyi18n-vue.xml

@@ -1,6 +1,15 @@
 <idea-plugin>
     <extensions defaultExtensionNs="com.intellij">
-        <lang.foldingBuilder language="HTML"
-                             implementationClass="de.marhali.easyi18n.editor.generic.GenericFoldingBuilder" />
+        <lang.foldingBuilder language="VueJS" implementationClass="de.marhali.easyi18n.assistance.folding.JsFoldingBuilder" />
+
+        <lang.documentationProvider
+                language="VueJS"
+                implementationClass="de.marhali.easyi18n.assistance.documentation.CommonDocumentationProvider"
+        />
+
+        <lang.documentationProvider
+                language="Vue"
+                implementationClass="de.marhali.easyi18n.assistance.documentation.CommonDocumentationProvider"
+        />
     </extensions>
 </idea-plugin>

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

@@ -13,6 +13,7 @@
     <depends optional="true" config-file="de.marhali.easyi18n-javascript.xml">JavaScript</depends>
     <depends optional="true" config-file="de.marhali.easyi18n-java.xml">com.intellij.java</depends>
     <depends optional="true" config-file="de.marhali.easyi18n-vue.xml">org.jetbrains.plugins.vue</depends>
+    <depends optional="true" config-file="de.marhali.easyi18n-php.xml">com.jetbrains.php</depends>
 
     <actions>
         <action
@@ -24,18 +25,15 @@
     </actions>
 
     <extensions defaultExtensionNs="com.intellij">
-        <toolWindow id="Easy I18n" anchor="bottom" factoryClass="de.marhali.easyi18n.service.TranslatorToolWindowFactory" />
+        <toolWindow id="Easy I18n" anchor="bottom"
+                    factoryClass="de.marhali.easyi18n.service.TranslatorToolWindowFactory"
+                    icon="/icons/translate13.svg"/>
 
-        <projectService serviceImplementation="de.marhali.easyi18n.service.SettingsService" />
+        <projectService serviceImplementation="de.marhali.easyi18n.settings.ProjectSettingsService"/>
 
-        <completion.contributor language="any"
-                                implementationClass="de.marhali.easyi18n.editor.generic.GenericKeyCompletionContributor" />
-
-        <annotator language=""
-                   implementationClass="de.marhali.easyi18n.editor.generic.GenericKeyAnnotator" />
-
-        <psi.referenceContributor
-                implementation="de.marhali.easyi18n.editor.generic.GenericKeyReferenceContributor" />
+        <projectConfigurable parentId="tools" instance="de.marhali.easyi18n.settings.ProjectSettingsConfigurable"
+                             id="de.marhali.easyi18n.service.AppSettingsConfigurable"
+                             displayName="Easy I18n" nonDefaultProject="true"/>
 
         <notificationGroup displayType="BALLOON" id="Easy I18n Notification Group"/>
 

src/main/resources/META-INF/toolWindowIcon.svg

@@ -1,9 +0,0 @@
-<svg width="13" height="13" xmlns="http://www.w3.org/2000/svg">
- <!-- Created with Method Draw - http://github.com/duopixel/Method-Draw/ -->
- <g id="Layer_1">
-  <title>Layer 1</title>
-  <line stroke-linecap="null" stroke-linejoin="null" id="svg_16" y2="10.12481" x2="3.98555" y1="3.34971" x1="3.98555" opacity="undefined" fill-opacity="null" stroke-opacity="null" stroke-dasharray="null" stroke-width="null" stroke="#000000" fill="none"/>
-  <line stroke-linecap="null" stroke-linejoin="null" id="svg_17" y2="3.69653" x2="1.32659" y1="3.69653" x1="6.76012" opacity="undefined" fill-opacity="null" stroke-opacity="null" stroke-dasharray="null" stroke-width="null" stroke="#000000" fill="none"/>
-  <line stroke-linecap="null" stroke-linejoin="null" id="svg_21" y2="9.53468" x2="10.97977" y1="9.53468" x1="6.4711" opacity="undefined" fill-opacity="null" stroke-opacity="null" stroke-dasharray="null" stroke-width="null" stroke="#000000" fill="none"/>
- </g>
-</svg>

src/main/resources/icons/translate13.svg

@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="13" height="13" viewBox="0 0 13 13">
+    <path stroke="#6E6E6E" stroke-width="2" stroke-linecap="undefined" stroke-linejoin="undefined" fill="none"
+          d="M4.457 2.992v8.995M8.064 2.027H1.006M7.939 10.987h4.047"/>
+</svg>

src/main/resources/icons/translate13_dark.svg

@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="13" height="13" viewBox="0 0 13 13">
+    <path stroke="#AFB1B3" stroke-width="2" stroke-linecap="undefined" stroke-linejoin="undefined" fill="none"
+          d="M4.457 2.992v8.995M8.064 2.027H1.006M7.939 10.987h4.047"/>
+</svg>

src/main/resources/messages.properties

@@ -1,3 +1,4 @@
+documentation=EasyI18n Translation
 view.tree.title=Tree View
 view.tree.collapse=Collapse Tree
 view.tree.expand=Expand Tree
@@ -10,21 +11,51 @@ action.reload=Reload From Disk
 action.settings=Settings
 action.search=Search...
 action.delete=Delete
+action.extract=Extract translation
 translation.key=Key
 translation.locales=Locales
-settings.path.title=Locales Directory
-settings.path.text=Locales directory
-settings.strategy.title=Translation file structure
-settings.strategy.folder=Single Directory;Modularized: Locale / Namespace;Modularized: Namespace / Locale
-settings.strategy.folder.tooltip=What is the folder structure of your translation files?
-settings.strategy.parser=JSON;JSON5;YAML;YML;Properties;ARB
-settings.strategy.parser.tooltip=Which file parser should be used to process your translation files?
-settings.strategy.file-pattern.tooltip=Defines a wildcard matcher to filter relevant translation files. For example *.json, *.???.
-settings.preview=Preview locale
-settings.path.prefix=Path prefix
-settings.keys.sort=Sort translation keys alphabetically
-settings.keys.nested=Escape delimiter character within a section layer.
-settings.editor.assistance=I18n key completion, annotation and reference inside editor
+# Settings
+settings.hint.text=Project-specific configuration. For an easy start, you can use one of the existing presets.
+settings.hint.action=Fore more information, see the documentation
+settings.preset.title=Preset
+settings.preset.tooltip=Choose a configuration template that best fits your project. After that you can make further changes.
+# Resource Configuration
+settings.resource.title=Resource Configuration
+settings.resource.path.window=Locales Directory
+settings.resource.path.title=Locales directory
+settings.resource.path.tooltip=Define the folder which contains all translation files. For nested folders, use the top folder.
+settings.resource.strategy=File structure
+settings.resource.folder.items=Single Directory;Modularized: Locale / Namespace;Modularized: Namespace / Locale
+settings.resource.folder.tooltip=What is the folder structure of your translation files?
+settings.resource.parser.items=JSON;JSON5;YAML;YML;Properties;ARB
+settings.resource.parser.tooltip=Which file parser should be used to process your translation files?
+settings.resource.file-pattern.tooltip=Defines a wildcard matcher to filter relevant translation files. For example *.json, *.??? or *.*.
+settings.resource.sorting.title=Sort translation keys alphabetically
+settings.resource.sorting.tooltip=Sorts all translation keys alphabetically. If disabled, the original key-order in the files is kept.
+# Editor Configuration
+settings.editor.title=Editor Configuration
+settings.editor.key.title=Key delimiters
+settings.editor.key.namespace.title=[namespace]
+settings.editor.key.namespace.tooltip=Sets the separator used between namespace and key path.
+settings.editor.key.section.title=[section]
+settings.editor.key.section.tooltip=Sets the separator used between section nodes of the key path.
+settings.editor.key.leaf.title=[leaf
+settings.editor.key.context.title=context
+settings.editor.key.context.tooltip=Sets the separator used to define context-specific variants of a translation.
+settings.editor.key.plural.title=pluralization]
+settings.editor.key.plural.tooltip=Sets the separator used to define different pluralization's of a translation.
+settings.editor.default-namespace.title=Default namespace
+settings.editor.default-namespace.tooltip=Specifies the namespace to use by default if none is specified in a translation key. The field can be left blank to ignore this feature.
+settings.editor.preview.title=Preview locale
+settings.editor.preview.tooltip=Defines the language to be displayed in editor previews.
+settings.editor.key.nesting.title=Escape section delimiter within a section layer
+settings.editor.key.nesting.tooltip=Escapes the section delimiter within a section to properly reconstruct nested key sections. Disable this feature if nested key sections are the exception rather than the rule in your translation file.
+settings.editor.assistance.title=Editor code assistance for translations
+settings.editor.assistance.tooltip=Activates editor support to reference, auto-complete and folding of existing translations.
+# Experimental configuration
+settings.experimental.title=Experimental Configuration
+settings.experimental.always-fold.title=Always fold translation keys
+settings.experimental.always-fold.tooltip=Forces the editor to always display the value behind a translation key. The value cannot be unfolded when this function is active.
 error.io=An error occurred while processing translation files. \n\
   Config: {0} => {1} ({2}) \n\
   Path: {3} \n\