diff --git a/mainwindow.cpp b/mainwindow.cpp
index 4889d67..a9beae3 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -1,355 +1,360 @@
-#include "mainwindow.h"
-
-#include "sciedit.h"
-#include "tabwidget.h"
-#include "documentmanager.h"
-#include "appsettings.h"
-#include "editorviewhelper.h"
-
-#include <QActionGroup>
-#include <QApplication>
-#include <QMenu>
-#include <QStringBuilder>
-#include <QStatusBar>
-#include <QFileDialog>
-#include <QMessageBox>
-
-#include <KActionCollection>
-#include <KStandardAction>
-#include <KActionMenu>
-#include <KConfigDialog>
-#include <KColorSchemeManager>
-#include <KColorSchemeMenu>
-#include <QSpinBox>
-
-#include <ILexer.h>
-#include <Lexilla.h>
-
-MainWindow::MainWindow(QWidget *parent)
-    : KXmlGuiWindow(parent)
-    , m_documentManager(new DocumentManager(this))
-    , m_tabWidget(new TabWidget(m_documentManager, this))
-    , m_cursorPosStatusLabel(new QLabel(QString("Ln: ?  Col: ?"), this))
-    , m_encodingStatusLabel(new QLabel(QString("UTF-8"), this))
-    , m_languageStatusLabel(new QLabel(QString("Plain Text"), this))
-{
-    setCentralWidget(m_tabWidget);
-
-    // 设置状态栏
-    statusBar()->addPermanentWidget(m_cursorPosStatusLabel);
-    statusBar()->addPermanentWidget(m_encodingStatusLabel);
-    statusBar()->addPermanentWidget(m_languageStatusLabel);
-
-    // 连接标签页信号
-    connect(m_tabWidget, &TabWidget::currentEditorChanged, this, &MainWindow::onCurrentEditorChanged);
-    
-    // 连接文档管理器信号
-    connect(m_documentManager, &DocumentManager::documentModified, this, &MainWindow::onDocumentModified);
-
-    setupActions();
-    
-    // 创建第一个标签页
-    newFile();
-}
-
-MainWindow::~MainWindow()
-{
-}
-
-void MainWindow::setupActions()
-{
-    using namespace Qt::Literals::StringLiterals;
-
-    // "File" menu
-    KStandardAction::openNew(this, &MainWindow::newFile, actionCollection());
-    KStandardAction::open(this, &MainWindow::openFile, actionCollection());
-    KStandardAction::save(this, &MainWindow::saveFile, actionCollection());
-    KStandardAction::close(this, &MainWindow::closeFile, actionCollection());
-    KStandardAction::quit(qApp, &QApplication::quit, actionCollection());
-    
-    // 添加另存为动作
-    QAction *saveAsAction = KStandardAction::saveAs(this, &MainWindow::saveAsFile, actionCollection());
-
-    // "Edit" menu
-    KStandardAction::undo(this, [this](){
-        if (SciEdit *editor = m_tabWidget->currentEditor()) {
-            editor->undo();
-        }
-    }, actionCollection());
-    KStandardAction::redo(this, [this](){
-        if (SciEdit *editor = m_tabWidget->currentEditor()) {
-            editor->redo();
-        }
-    }, actionCollection());
-    KStandardAction::cut(this, [this](){
-        if (SciEdit *editor = m_tabWidget->currentEditor()) {
-            editor->cut();
-        }
-    }, actionCollection());
-    KStandardAction::copy(this, [this](){
-        if (SciEdit *editor = m_tabWidget->currentEditor()) {
-            editor->copy();
-        }
-    }, actionCollection());
-    KStandardAction::paste(this, [this](){
-        if (SciEdit *editor = m_tabWidget->currentEditor()) {
-            editor->paste();
-        }
-    }, actionCollection());
-
-    // "Search" menu
-    KStandardAction::find(this, [](){}, actionCollection());
-    KStandardAction::findNext(this, [](){}, actionCollection());
-    KStandardAction::findPrev(this, [](){}, actionCollection());
-    KStandardAction::replace(this, [](){}, actionCollection());
-    qDebug() << KStandardAction::name(KStandardAction::Replace);
-    
-    // "Language" menu
-    QAction *lexerNoneAction = new QAction(this);
-    lexerNoneAction->setText("None (Normal Text)");
-    actionCollection()->addAction(u"lexer_none"_s, lexerNoneAction);
-    connect(lexerNoneAction, &QAction::triggered, this, [this](){
-        if (SciEdit *editor = m_tabWidget->currentEditor()) {
-            editor->setLexer(nullptr);
-        }
-    });
-
-    for (const QChar & group : LexerGroupActionMenu::groups()) {
-        LexerGroupActionMenu *lexerGroupMenu = new LexerGroupActionMenu(group.toUpper(), group, this);
-        actionCollection()->addAction(QStringLiteral("lexer_group_") % group, lexerGroupMenu);
-        connect(lexerGroupMenu, &LexerGroupActionMenu::lexerSelected, this, &MainWindow::applyLexer);
-    }
-
-    // Toolbar actions
-    KStandardAction::zoomIn(this, [this](){
-        if (SciEdit *editor = m_tabWidget->currentEditor()) {
-            editor->zoomIn();
-        }
-    }, actionCollection());
-    KStandardAction::zoomOut(this, [this](){
-        if (SciEdit *editor = m_tabWidget->currentEditor()) {
-            editor->zoomOut();
-        }
-    }, actionCollection());
-
-    KStandardAction::preferences(this, &MainWindow::showSettings, actionCollection());
-
-    QAction *toggleWrapModeAction = new QAction(this);
-    toggleWrapModeAction->setText("Toggle Wrap Mode");
-    toggleWrapModeAction->setIcon(QIcon::fromTheme(u"text-wrap"_s));
-    toggleWrapModeAction->setCheckable(true);
-    actionCollection()->addAction(u"toggle_wrap_mode"_s, toggleWrapModeAction);
-    connect(toggleWrapModeAction, &QAction::triggered, this, [this, toggleWrapModeAction](){
-        if (SciEdit *editor = m_tabWidget->currentEditor()) {
-            bool switchToWrapNone = editor->wrapMode() == SC_WRAP_WORD;
-            editor->setWrapMode(switchToWrapNone ? SC_WRAP_NONE : SC_WRAP_WORD);
-            toggleWrapModeAction->setChecked(!switchToWrapNone);
-        }
-    });
-
-    QAction *toggleWhitespaceVisibilityAction = new QAction(this);
-    toggleWhitespaceVisibilityAction->setText("Show All Characters");
-    toggleWhitespaceVisibilityAction->setCheckable(true);
-    // toggleWhitespaceVisibilityAction->setIcon(QIcon::fromTheme(u"text-wrap"_s));
-    actionCollection()->addAction(u"toggle_show_all_characters"_s, toggleWhitespaceVisibilityAction);
-    connect(toggleWhitespaceVisibilityAction, &QAction::triggered, this, [this, toggleWhitespaceVisibilityAction](){
-        if (SciEdit *editor = m_tabWidget->currentEditor()) {
-            bool switchToVisible = editor->viewWS() == SCWS_INVISIBLE;
-            editor->setViewWS(switchToVisible ? SCWS_VISIBLEALWAYS : SCWS_INVISIBLE);
-            editor->setViewEOL(switchToVisible);
-            toggleWhitespaceVisibilityAction->setChecked(switchToVisible);
-        }
-    });
-
-    QAction *toggleIndentGuideAction = new QAction(this);
-    toggleIndentGuideAction->setText("Toggle Indent Guide");
-    toggleIndentGuideAction->setIcon(QIcon::fromTheme(u"show-guides"_s));
-    actionCollection()->addAction(u"toggle_indent_guide"_s, toggleIndentGuideAction);
-    connect(toggleIndentGuideAction, &QAction::triggered, this, [this](){
-        // m_editor->setIndentationGuides(!m_editor->indentationGuides());
-    });
-
-    QAction *toggleEditorDarkThemeAction = new QAction(this);
-    toggleEditorDarkThemeAction->setText("Editor Dark Theme");
-    toggleEditorDarkThemeAction->setCheckable(true);
-    toggleEditorDarkThemeAction->setChecked(AppSettings::editorDarkTheme());
-    actionCollection()->addAction(u"toggle_editor_dark_theme"_s, toggleEditorDarkThemeAction);
-    connect(toggleEditorDarkThemeAction, &QAction::toggled, this, [this](bool checked){
-        AppSettings::setEditorDarkTheme(checked);
-        AppSettings::self()->save();
-        applySettingsToAllEditors();
-    });
-
-    // Load themes
-    KColorSchemeManager *manager = KColorSchemeManager::instance();
-    auto *colorSelectionMenu = KColorSchemeMenu::createMenu(manager, this);
-    colorSelectionMenu->menu()->setTitle("&Window Color Scheme");
-    actionCollection()->addAction(QStringLiteral("colorscheme_menu"), colorSelectionMenu);
-
-    setupGUI();
-}
-
-void MainWindow::showSettings()
-{
-    if (KConfigDialog::showDialog(QStringLiteral("settings"))) {
-        return;
-    }
-    KConfigDialog *dialog = new KConfigDialog(this, QStringLiteral("settings"), AppSettings::self());
-    dialog->setFaceType(KPageDialog::FlatList);
-    dialog->addPage(new SettingsPage<Ui::GeneralSettings>(dialog), "Appearance", "preferences-desktop-theme-global");
-
-    connect(dialog, &KConfigDialog::settingsChanged, this, [this](const QString &dialogName){
-        Q_UNUSED(dialogName)
-        applySettingsToAllEditors();
-        if (QAction *action = actionCollection()->action(QStringLiteral("toggle_editor_dark_theme"))) {
-            action->setChecked(AppSettings::editorDarkTheme());
-        }
-    });
-
-    dialog->show();
-}
-
-void MainWindow::applyLexer(const QString &lexerName)
-{
-    if (SciEdit *editor = m_tabWidget->currentEditor()) {
-        Scintilla::ILexer5 * lexer = CreateLexer(lexerName.toStdString().c_str());
-        editor->setLexer(lexer);
-    }
-}
-
-void MainWindow::newFile()
-{
-    m_tabWidget->newDocument();
-}
-
-void MainWindow::openFile()
-{
-    QString fileName = QFileDialog::getOpenFileName(this, 
-        tr("Open File"), 
-        QString(), 
-        tr("All Files (*.*)"));
-    
-    if (!fileName.isEmpty()) {
-        m_tabWidget->openDocument(fileName);
-    }
-}
-
-void MainWindow::saveFile()
-{
-    m_tabWidget->saveCurrentDocument();
-}
-
-void MainWindow::saveAsFile()
-{
-    m_tabWidget->saveCurrentDocumentAs();
-}
-
-void MainWindow::closeFile()
-{
-    m_tabWidget->closeCurrentTab();
-}
-
-void MainWindow::onCurrentTabChanged()
-{
-    updateWindowTitle();
-    updateStatusBar();
-    updateActions();
-}
-
-void MainWindow::onCurrentEditorChanged(SciEdit *editor)
-{
-    Q_UNUSED(editor)
-    updateWindowTitle();
-    updateStatusBar();
-    updateActions();
-    
-    // 连接当前编辑器的光标位置变化信号
-    if (editor) {
-        applySettingsToEditor(editor);
-        connect(editor, &SciEdit::cursorPosChanged, this, [this](int line, int column) {
-            m_cursorPosStatusLabel->setText(QString("Ln: %1  Col: %2").arg(line).arg(column));
-        });
-    }
-}
-
-void MainWindow::applySettingsToEditor(SciEdit *editor)
-{
-    if (!editor) {
-        return;
-    }
-    editor->setTabWidth(AppSettings::tabWidth());
-    editor->setEditorFont(AppSettings::editorFont());
-    editor->applyTheme(AppSettings::editorDarkTheme());
-}
-
-void MainWindow::applySettingsToAllEditors()
-{
-    for (int i = 0; i < m_tabWidget->count(); ++i) {
-        applySettingsToEditor(m_tabWidget->editorAt(i));
-    }
-}
-
-void MainWindow::onDocumentModified(int docIndex, bool modified)
-{
-    Q_UNUSED(docIndex)
-    Q_UNUSED(modified)
-    updateWindowTitle();
-}
-
-void MainWindow::updateWindowTitle()
-{
-    QString title = "Pineapple Notepad";
-    
-    if (SciEdit *editor = m_tabWidget->currentEditor()) {
-        int docId = m_tabWidget->currentDocumentId();
-        if (docId >= 0) {
-            QString fileName = m_documentManager->getDocumentTitle(docId);
-            bool isModified = m_documentManager->isDocumentModified(docId);
-            
-            title = QString("%1%2")
-                    .arg(fileName)
-                    .arg(isModified ? "*" : "");
-        }
-    }
-    
-    setWindowTitle(title);
-}
-
-void MainWindow::updateStatusBar()
-{
-    if (SciEdit *editor = m_tabWidget->currentEditor()) {
-        int docId = m_tabWidget->currentDocumentId();
-        if (docId >= 0) {
-            QString encoding = m_documentManager->getDocumentEncoding(docId);
-            QString language = m_documentManager->getDocumentLanguage(docId);
-            
-            m_encodingStatusLabel->setText(encoding);
-            m_languageStatusLabel->setText(language);
-        }
-    } else {
-        m_encodingStatusLabel->setText("UTF-8");
-        m_languageStatusLabel->setText("Plain Text");
-    }
-}
-
-void MainWindow::updateActions()
-{
-    bool hasEditor = (m_tabWidget->currentEditor() != nullptr);
-    
-    // 更新编辑相关的动作状态
-    if (QAction *undoAction = actionCollection()->action(KStandardAction::name(KStandardAction::Undo))) {
-        undoAction->setEnabled(hasEditor);
-    }
-    if (QAction *redoAction = actionCollection()->action(KStandardAction::name(KStandardAction::Redo))) {
-        redoAction->setEnabled(hasEditor);
-    }
-    if (QAction *cutAction = actionCollection()->action(KStandardAction::name(KStandardAction::Cut))) {
-        cutAction->setEnabled(hasEditor);
-    }
-    if (QAction *copyAction = actionCollection()->action(KStandardAction::name(KStandardAction::Copy))) {
-        copyAction->setEnabled(hasEditor);
-    }
-    if (QAction *pasteAction = actionCollection()->action(KStandardAction::name(KStandardAction::Paste))) {
-        pasteAction->setEnabled(hasEditor);
-    }
-}
+#include "mainwindow.h"
+
+#include "sciedit.h"
+#include "tabwidget.h"
+#include "documentmanager.h"
+#include "appsettings.h"
+#include "editorviewhelper.h"
+
+#include <QActionGroup>
+#include <QApplication>
+#include <QMenu>
+#include <QStringBuilder>
+#include <QStatusBar>
+#include <QFileDialog>
+#include <QMessageBox>
+
+#include <KActionCollection>
+#include <KStandardAction>
+#include <KActionMenu>
+#include <KConfigDialog>
+#include <KColorSchemeManager>
+#include <KColorSchemeMenu>
+#include <QSpinBox>
+
+#include <ILexer.h>
+#include <Lexilla.h>
+
+MainWindow::MainWindow(QWidget *parent)
+    : KXmlGuiWindow(parent)
+    , m_documentManager(new DocumentManager(this))
+    , m_tabWidget(new TabWidget(m_documentManager, this))
+    , m_cursorPosStatusLabel(new QLabel(QString("Ln: ?  Col: ?"), this))
+    , m_encodingStatusLabel(new QLabel(QString("UTF-8"), this))
+    , m_languageStatusLabel(new QLabel(QString("Plain Text"), this))
+{
+    setCentralWidget(m_tabWidget);
+
+    // 设置状态栏
+    statusBar()->addPermanentWidget(m_cursorPosStatusLabel);
+    statusBar()->addPermanentWidget(m_encodingStatusLabel);
+    statusBar()->addPermanentWidget(m_languageStatusLabel);
+
+    // 连接标签页信号
+    connect(m_tabWidget, &TabWidget::currentEditorChanged, this, &MainWindow::onCurrentEditorChanged);
+    
+    // 连接文档管理器信号
+    connect(m_documentManager, &DocumentManager::documentModified, this, &MainWindow::onDocumentModified);
+
+    setupActions();
+    
+    // 创建第一个标签页
+    newFile();
+}
+
+MainWindow::~MainWindow()
+{
+}
+
+void MainWindow::setupActions()
+{
+    using namespace Qt::Literals::StringLiterals;
+
+    // "File" menu
+    KStandardAction::openNew(this, &MainWindow::newFile, actionCollection());
+    KStandardAction::open(this, &MainWindow::openFile, actionCollection());
+    KStandardAction::save(this, &MainWindow::saveFile, actionCollection());
+    KStandardAction::close(this, &MainWindow::closeFile, actionCollection());
+    KStandardAction::quit(qApp, &QApplication::quit, actionCollection());
+    
+    // 添加另存为动作
+    QAction *saveAsAction = KStandardAction::saveAs(this, &MainWindow::saveAsFile, actionCollection());
+
+    // "Edit" menu
+    KStandardAction::undo(this, [this](){
+        if (SciEdit *editor = m_tabWidget->currentEditor()) {
+            editor->undo();
+        }
+    }, actionCollection());
+    KStandardAction::redo(this, [this](){
+        if (SciEdit *editor = m_tabWidget->currentEditor()) {
+            editor->redo();
+        }
+    }, actionCollection());
+    KStandardAction::cut(this, [this](){
+        if (SciEdit *editor = m_tabWidget->currentEditor()) {
+            editor->cut();
+        }
+    }, actionCollection());
+    KStandardAction::copy(this, [this](){
+        if (SciEdit *editor = m_tabWidget->currentEditor()) {
+            editor->copy();
+        }
+    }, actionCollection());
+    KStandardAction::paste(this, [this](){
+        if (SciEdit *editor = m_tabWidget->currentEditor()) {
+            editor->paste();
+        }
+    }, actionCollection());
+
+    // "Search" menu
+    KStandardAction::find(this, [](){}, actionCollection());
+    KStandardAction::findNext(this, [](){}, actionCollection());
+    KStandardAction::findPrev(this, [](){}, actionCollection());
+    KStandardAction::replace(this, [](){}, actionCollection());
+    qDebug() << KStandardAction::name(KStandardAction::Replace);
+    
+    // "Language" menu
+    QAction *lexerNoneAction = new QAction(this);
+    lexerNoneAction->setText("None (Normal Text)");
+    actionCollection()->addAction(u"lexer_none"_s, lexerNoneAction);
+    connect(lexerNoneAction, &QAction::triggered, this, [this](){
+        if (SciEdit *editor = m_tabWidget->currentEditor()) {
+            editor->setLexer(nullptr);
+        }
+    });
+
+    QMetaObject::invokeMethod(this, [this](){
+        auto lexerGroupListActions = QList<QAction*>();
+        for (const QChar &group : LexerGroupActionMenu::groups()) {
+            auto *lexerGroupMenu = new LexerGroupActionMenu(group.toUpper(), group, this);
+            connect(lexerGroupMenu, &LexerGroupActionMenu::lexerSelected, this, &MainWindow::applyLexer);
+            lexerGroupListActions.append(lexerGroupMenu);
+        }
+        unplugActionList("lexer_group_list");
+        plugActionList(QStringLiteral("lexer_group_list"), lexerGroupListActions);
+    }, Qt::QueuedConnection);
+
+    // Toolbar actions
+    KStandardAction::zoomIn(this, [this](){
+        if (SciEdit *editor = m_tabWidget->currentEditor()) {
+            editor->zoomIn();
+        }
+    }, actionCollection());
+    KStandardAction::zoomOut(this, [this](){
+        if (SciEdit *editor = m_tabWidget->currentEditor()) {
+            editor->zoomOut();
+        }
+    }, actionCollection());
+
+    KStandardAction::preferences(this, &MainWindow::showSettings, actionCollection());
+
+    QAction *toggleWrapModeAction = new QAction(this);
+    toggleWrapModeAction->setText("Toggle Wrap Mode");
+    toggleWrapModeAction->setIcon(QIcon::fromTheme(u"text-wrap"_s));
+    toggleWrapModeAction->setCheckable(true);
+    actionCollection()->addAction(u"toggle_wrap_mode"_s, toggleWrapModeAction);
+    connect(toggleWrapModeAction, &QAction::triggered, this, [this, toggleWrapModeAction](){
+        if (SciEdit *editor = m_tabWidget->currentEditor()) {
+            bool switchToWrapNone = editor->wrapMode() == SC_WRAP_WORD;
+            editor->setWrapMode(switchToWrapNone ? SC_WRAP_NONE : SC_WRAP_WORD);
+            toggleWrapModeAction->setChecked(!switchToWrapNone);
+        }
+    });
+
+    QAction *toggleWhitespaceVisibilityAction = new QAction(this);
+    toggleWhitespaceVisibilityAction->setText("Show All Characters");
+    toggleWhitespaceVisibilityAction->setCheckable(true);
+    // toggleWhitespaceVisibilityAction->setIcon(QIcon::fromTheme(u"text-wrap"_s));
+    actionCollection()->addAction(u"toggle_show_all_characters"_s, toggleWhitespaceVisibilityAction);
+    connect(toggleWhitespaceVisibilityAction, &QAction::triggered, this, [this, toggleWhitespaceVisibilityAction](){
+        if (SciEdit *editor = m_tabWidget->currentEditor()) {
+            bool switchToVisible = editor->viewWS() == SCWS_INVISIBLE;
+            editor->setViewWS(switchToVisible ? SCWS_VISIBLEALWAYS : SCWS_INVISIBLE);
+            editor->setViewEOL(switchToVisible);
+            toggleWhitespaceVisibilityAction->setChecked(switchToVisible);
+        }
+    });
+
+    QAction *toggleIndentGuideAction = new QAction(this);
+    toggleIndentGuideAction->setText("Toggle Indent Guide");
+    toggleIndentGuideAction->setIcon(QIcon::fromTheme(u"show-guides"_s));
+    actionCollection()->addAction(u"toggle_indent_guide"_s, toggleIndentGuideAction);
+    connect(toggleIndentGuideAction, &QAction::triggered, this, [this](){
+        // m_editor->setIndentationGuides(!m_editor->indentationGuides());
+    });
+
+    QAction *toggleEditorDarkThemeAction = new QAction(this);
+    toggleEditorDarkThemeAction->setText("Editor Dark Theme");
+    toggleEditorDarkThemeAction->setCheckable(true);
+    toggleEditorDarkThemeAction->setChecked(AppSettings::editorDarkTheme());
+    actionCollection()->addAction(u"toggle_editor_dark_theme"_s, toggleEditorDarkThemeAction);
+    connect(toggleEditorDarkThemeAction, &QAction::toggled, this, [this](bool checked){
+        AppSettings::setEditorDarkTheme(checked);
+        AppSettings::self()->save();
+        applySettingsToAllEditors();
+    });
+
+    // Load themes
+    KColorSchemeManager *manager = KColorSchemeManager::instance();
+    auto *colorSelectionMenu = KColorSchemeMenu::createMenu(manager, this);
+    colorSelectionMenu->menu()->setTitle("&Window Color Scheme");
+    actionCollection()->addAction(QStringLiteral("colorscheme_menu"), colorSelectionMenu);
+
+    setupGUI();
+}
+
+void MainWindow::showSettings()
+{
+    if (KConfigDialog::showDialog(QStringLiteral("settings"))) {
+        return;
+    }
+    KConfigDialog *dialog = new KConfigDialog(this, QStringLiteral("settings"), AppSettings::self());
+    dialog->setFaceType(KPageDialog::FlatList);
+    dialog->addPage(new SettingsPage<Ui::GeneralSettings>(dialog), "Appearance", "preferences-desktop-theme-global");
+
+    connect(dialog, &KConfigDialog::settingsChanged, this, [this](const QString &dialogName){
+        Q_UNUSED(dialogName)
+        applySettingsToAllEditors();
+        if (QAction *action = actionCollection()->action(QStringLiteral("toggle_editor_dark_theme"))) {
+            action->setChecked(AppSettings::editorDarkTheme());
+        }
+    });
+
+    dialog->show();
+}
+
+void MainWindow::applyLexer(const QString &lexerName)
+{
+    if (SciEdit *editor = m_tabWidget->currentEditor()) {
+        Scintilla::ILexer5 * lexer = CreateLexer(lexerName.toStdString().c_str());
+        editor->setLexer(lexer);
+    }
+}
+
+void MainWindow::newFile()
+{
+    m_tabWidget->newDocument();
+}
+
+void MainWindow::openFile()
+{
+    QString fileName = QFileDialog::getOpenFileName(this, 
+        tr("Open File"), 
+        QString(), 
+        tr("All Files (*.*)"));
+    
+    if (!fileName.isEmpty()) {
+        m_tabWidget->openDocument(fileName);
+    }
+}
+
+void MainWindow::saveFile()
+{
+    m_tabWidget->saveCurrentDocument();
+}
+
+void MainWindow::saveAsFile()
+{
+    m_tabWidget->saveCurrentDocumentAs();
+}
+
+void MainWindow::closeFile()
+{
+    m_tabWidget->closeCurrentTab();
+}
+
+void MainWindow::onCurrentTabChanged()
+{
+    updateWindowTitle();
+    updateStatusBar();
+    updateActions();
+}
+
+void MainWindow::onCurrentEditorChanged(SciEdit *editor)
+{
+    Q_UNUSED(editor)
+    updateWindowTitle();
+    updateStatusBar();
+    updateActions();
+    
+    // 连接当前编辑器的光标位置变化信号
+    if (editor) {
+        applySettingsToEditor(editor);
+        connect(editor, &SciEdit::cursorPosChanged, this, [this](int line, int column) {
+            m_cursorPosStatusLabel->setText(QString("Ln: %1  Col: %2").arg(line).arg(column));
+        });
+    }
+}
+
+void MainWindow::applySettingsToEditor(SciEdit *editor)
+{
+    if (!editor) {
+        return;
+    }
+    editor->setTabWidth(AppSettings::tabWidth());
+    editor->setEditorFont(AppSettings::editorFont());
+    editor->applyTheme(AppSettings::editorDarkTheme());
+}
+
+void MainWindow::applySettingsToAllEditors()
+{
+    for (int i = 0; i < m_tabWidget->count(); ++i) {
+        applySettingsToEditor(m_tabWidget->editorAt(i));
+    }
+}
+
+void MainWindow::onDocumentModified(int docIndex, bool modified)
+{
+    Q_UNUSED(docIndex)
+    Q_UNUSED(modified)
+    updateWindowTitle();
+}
+
+void MainWindow::updateWindowTitle()
+{
+    QString title = "Pineapple Notepad";
+    
+    if (SciEdit *editor = m_tabWidget->currentEditor()) {
+        int docId = m_tabWidget->currentDocumentId();
+        if (docId >= 0) {
+            QString fileName = m_documentManager->getDocumentTitle(docId);
+            bool isModified = m_documentManager->isDocumentModified(docId);
+            
+            title = QString("%1%2")
+                    .arg(fileName)
+                    .arg(isModified ? "*" : "");
+        }
+    }
+    
+    setWindowTitle(title);
+}
+
+void MainWindow::updateStatusBar()
+{
+    if (SciEdit *editor = m_tabWidget->currentEditor()) {
+        int docId = m_tabWidget->currentDocumentId();
+        if (docId >= 0) {
+            QString encoding = m_documentManager->getDocumentEncoding(docId);
+            QString language = m_documentManager->getDocumentLanguage(docId);
+            
+            m_encodingStatusLabel->setText(encoding);
+            m_languageStatusLabel->setText(language);
+        }
+    } else {
+        m_encodingStatusLabel->setText("UTF-8");
+        m_languageStatusLabel->setText("Plain Text");
+    }
+}
+
+void MainWindow::updateActions()
+{
+    bool hasEditor = (m_tabWidget->currentEditor() != nullptr);
+    
+    // 更新编辑相关的动作状态
+    if (QAction *undoAction = actionCollection()->action(KStandardAction::name(KStandardAction::Undo))) {
+        undoAction->setEnabled(hasEditor);
+    }
+    if (QAction *redoAction = actionCollection()->action(KStandardAction::name(KStandardAction::Redo))) {
+        redoAction->setEnabled(hasEditor);
+    }
+    if (QAction *cutAction = actionCollection()->action(KStandardAction::name(KStandardAction::Cut))) {
+        cutAction->setEnabled(hasEditor);
+    }
+    if (QAction *copyAction = actionCollection()->action(KStandardAction::name(KStandardAction::Copy))) {
+        copyAction->setEnabled(hasEditor);
+    }
+    if (QAction *pasteAction = actionCollection()->action(KStandardAction::name(KStandardAction::Paste))) {
+        pasteAction->setEnabled(hasEditor);
+    }
+}
diff --git a/pineapple-notepadui.rc b/pineapple-notepadui.rc
index 105d443..3b67a27 100644
--- a/pineapple-notepadui.rc
+++ b/pineapple-notepadui.rc
@@ -26,36 +26,14 @@ Template: https://github.com/KDE/kxmlgui/blob/master/src/ui_standards.rc
         <Action name="view_zoom_out"/>
       </Menu>-->
       <Action name="toggle_wrap_mode" />
-      <Action name="toggle_editor_dark_theme" />
+      <Action name="toggle_editor_dark_theme" />
     </Menu>
     <Menu name="encoding"><text>E&amp;ncoding</text>
     </Menu>
     <Menu name="language"><text>&amp;Language</text>
       <Action name="lexer_none" />
       <Separator/>
-      <!-- FIXME: those lexer_group_ actions should be exclude from Edit ToolBar dialog -->
-      <Action name="lexer_group_a" />
-      <Action name="lexer_group_b" />
-      <Action name="lexer_group_c" />
-      <Action name="lexer_group_d" />
-      <Action name="lexer_group_e" />
-      <Action name="lexer_group_f" />
-      <Action name="lexer_group_g" />
-      <Action name="lexer_group_h" />
-      <Action name="lexer_group_i" />
-      <Action name="lexer_group_j" />
-      <Action name="lexer_group_k" />
-      <Action name="lexer_group_l" />
-      <Action name="lexer_group_m" />
-      <Action name="lexer_group_n" />
-      <Action name="lexer_group_o" />
-      <Action name="lexer_group_p" />
-      <Action name="lexer_group_r" />
-      <Action name="lexer_group_s" />
-      <Action name="lexer_group_t" />
-      <Action name="lexer_group_v" />
-      <Action name="lexer_group_x" />
-      <Action name="lexer_group_y" />
+      <ActionList name="lexer_group_list" />
     </Menu>
     <Menu name="settings">
       <Action name="colorscheme_menu"/>