diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9737674..661f200 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -60,7 +60,8 @@ set(WIDGETS_HEADER_FILES
     renamingutility/filesystemitemmodel.h
     renamingutility/filteredfilesystemitemmodel.h
     renamingutility/renamingengine.h
-    renamingutility/scriptfunctions.h
+    renamingutility/scriptdefs.h
+    renamingutility/tageditorobject.h
 )
 set(WIDGETS_SRC_FILES
     gui/attachmentsedit.cpp
@@ -77,7 +78,6 @@ set(WIDGETS_SRC_FILES
     gui/infowidgetbase.cpp
     gui/initiate.cpp
     gui/javascripthighlighter.cpp
-    gui/previousvaluehandling.cpp
     gui/renamefilesdialog.cpp
     gui/settingsdialog.cpp
     gui/tagedit.cpp
@@ -86,7 +86,7 @@ set(WIDGETS_SRC_FILES
     renamingutility/filesystemitemmodel.cpp
     renamingutility/filteredfilesystemitemmodel.cpp
     renamingutility/renamingengine.cpp
-    renamingutility/scriptfunctions.cpp
+    renamingutility/tageditorobject.h
     resources/icons.qrc
     resources/scripts.qrc
 )
diff --git a/README.md b/README.md
index b0b4e0e..e2f0fe8 100644
--- a/README.md
+++ b/README.md
@@ -113,7 +113,10 @@ Here are some Bash examples which illustrate getting and setting tag information
 ## Build instructions
 The application depends on c++utilities, qtutilities and tagparser and is built in the same way as these libaries.
 
-The following Qt 5 modules are requried: core gui script widgets webenginewidgets/webkitwidgets
+The following Qt 5 modules are requried: core gui qml/script widgets webenginewidgets/webkitwidgets
+
+If script is installed on the system, the editor will link against it. Otherwise it will link against qml.
+To force usage of qml add "CONFIG+=forcejsengine" to the qmake arguments.
 
 If webkitwidgets is installed on the system, the editor will link against it. Otherwise it will link against webenginewidgets.
 To force usage of webenginewidgets add "CONFIG+=forcewebengine" to the qmake arguments.
diff --git a/gui/filefilterproxymodel.cpp b/gui/filefilterproxymodel.cpp
index 0ce2cfd..acd08a0 100644
--- a/gui/filefilterproxymodel.cpp
+++ b/gui/filefilterproxymodel.cpp
@@ -4,11 +4,6 @@
 
 namespace QtGui {
 
-/*
-    TRANSLATOR QtGui::FileFilterProxyModel
-    Necessary for lupdate.
-*/
-
 FileFilterProxyModel::FileFilterProxyModel(QObject *parent) :
     QSortFilterProxyModel(parent),
     m_filterEnabled(true)
diff --git a/gui/infowidgetbase.cpp b/gui/infowidgetbase.cpp
index 0a6b0f2..1e63dcd 100644
--- a/gui/infowidgetbase.cpp
+++ b/gui/infowidgetbase.cpp
@@ -23,11 +23,6 @@ using namespace Media;
 
 namespace QtGui {
 
-/*
-    TRANSLATOR QtGui::InfoWidgetBase
-    Necessary for lupdate.
-*/
-
 InfoWidgetBase::InfoWidgetBase(QWidget *parent) :
     QWidget(parent),
     m_notificationModel(nullptr)
diff --git a/gui/initiate.cpp b/gui/initiate.cpp
index b6663bc..18cce35 100644
--- a/gui/initiate.cpp
+++ b/gui/initiate.cpp
@@ -5,7 +5,7 @@
 
 // include configuration from separate header file when building with CMake
 #ifndef APP_METADATA_AVAIL
-#include "resources/config.h"
+# include "resources/config.h"
 #endif
 
 #include <qtutilities/resources/qtconfigarguments.h>
diff --git a/gui/mainwindow.cpp b/gui/mainwindow.cpp
index d606a06..d4efd58 100644
--- a/gui/mainwindow.cpp
+++ b/gui/mainwindow.cpp
@@ -64,11 +64,6 @@ using namespace Widgets;
 
 namespace QtGui {
 
-/*
-    TRANSLATOR QtGui::MainWindow
-    Necessary for lupdate.
-*/
-
 /*!
  * \brief The LoadingResult enum specifies whether the file could be parsed.
  */
diff --git a/gui/notificationlabel.cpp b/gui/notificationlabel.cpp
index f32970b..988db96 100644
--- a/gui/notificationlabel.cpp
+++ b/gui/notificationlabel.cpp
@@ -27,9 +27,6 @@ NotificationLabel::NotificationLabel(QWidget *parent) :
     m_updateTimer.setInterval(80);
 }
 
-NotificationLabel::~NotificationLabel()
-{}
-
 void NotificationLabel::paintEvent(QPaintEvent *event)
 {
     QStyle *style = QWidget::style();
diff --git a/gui/notificationlabel.h b/gui/notificationlabel.h
index 72573c3..73d1396 100644
--- a/gui/notificationlabel.h
+++ b/gui/notificationlabel.h
@@ -33,7 +33,6 @@ class NotificationLabel : public QWidget
     Q_PROPERTY(int maxIconSize READ maxIconSize WRITE setMaxIconSize)
 public:
     explicit NotificationLabel(QWidget *parent = nullptr);
-    virtual ~NotificationLabel();
 
     const QString &text() const;
     NotificationType notificationType() const;
diff --git a/gui/notificationmodel.cpp b/gui/notificationmodel.cpp
index 0d1155b..aa7a8e9 100644
--- a/gui/notificationmodel.cpp
+++ b/gui/notificationmodel.cpp
@@ -12,11 +12,6 @@ using namespace Media;
 
 namespace QtGui {
 
-/*
-    TRANSLATOR QtGui::NotificationModel
-    Necessary for lupdate.
-*/
-
 NotificationModel::NotificationModel(QObject *parent) :
     QAbstractListModel(parent)
 {}
diff --git a/gui/pathlineedit.cpp b/gui/pathlineedit.cpp
index 26468f1..790368f 100644
--- a/gui/pathlineedit.cpp
+++ b/gui/pathlineedit.cpp
@@ -15,18 +15,10 @@ using namespace Widgets;
 
 namespace QtGui {
 
-/*
-    TRANSLATOR QtGui::PathLineEdit
-    Necessary for lupdate.
-*/
-
 PathLineEdit::PathLineEdit(QWidget *parent) :
     ClearLineEdit(parent)
 {}
 
-PathLineEdit::~PathLineEdit()
-{}
-
 QAbstractItemModel *PathLineEdit::completionModel() const
 {
     if(QCompleter *c = completer()) {
diff --git a/gui/pathlineedit.h b/gui/pathlineedit.h
index 87ee01e..4839991 100644
--- a/gui/pathlineedit.h
+++ b/gui/pathlineedit.h
@@ -18,7 +18,6 @@ class PathLineEdit : public Widgets::ClearLineEdit
 
 public:
     explicit PathLineEdit(QWidget *parent = nullptr);
-    virtual ~PathLineEdit();
 
     QAbstractItemModel *completionModel() const;
     void setCompletionModel(QAbstractItemModel *model);
diff --git a/gui/picturepreviewselection.cpp b/gui/picturepreviewselection.cpp
index a2c0bdd..640cb5c 100644
--- a/gui/picturepreviewselection.cpp
+++ b/gui/picturepreviewselection.cpp
@@ -35,11 +35,6 @@ using namespace Media;
 
 namespace QtGui {
 
-/*
-    TRANSLATOR QtGui::PicturePreviewSelection
-    Necessary for lupdate.
-*/
-
 /*!
  * \brief Constructs a new PicturePreviewSelection for the specified \a tag and \a field.
  */
@@ -65,7 +60,7 @@ PicturePreviewSelection::PicturePreviewSelection(Tag *tag, KnownField field, QWi
 }
 
 /*!
- * \brief Destroys the PicturePreviewSelection.
+ * \brief Destroys the instance.
  */
 PicturePreviewSelection::~PicturePreviewSelection()
 {}
diff --git a/gui/picturepreviewselection.h b/gui/picturepreviewselection.h
index 8ec3d3a..70cd4d1 100644
--- a/gui/picturepreviewselection.h
+++ b/gui/picturepreviewselection.h
@@ -35,7 +35,7 @@ class PicturePreviewSelection : public QWidget
 
 public:
     explicit PicturePreviewSelection(Media::Tag *tag = nullptr, Media::KnownField field = Media::KnownField::Invalid, QWidget *parent = nullptr);
-    virtual ~PicturePreviewSelection();
+    ~PicturePreviewSelection();
     
     Media::Tag *tag() const;
     Media::KnownField field() const;
diff --git a/gui/previousvaluehandling.cpp b/gui/previousvaluehandling.cpp
deleted file mode 100644
index 93d17a1..0000000
--- a/gui/previousvaluehandling.cpp
+++ /dev/null
@@ -1,5 +0,0 @@
-#include "./previousvaluehandling.h"
-
-namespace QtGui {
-
-}
diff --git a/gui/renamefilesdialog.cpp b/gui/renamefilesdialog.cpp
index 49bfa3e..966f5ad 100644
--- a/gui/renamefilesdialog.cpp
+++ b/gui/renamefilesdialog.cpp
@@ -13,7 +13,6 @@
 #include <QMessageBox>
 #include <QFileDialog>
 #include <QDir>
-#include <QScriptEngine>
 #include <QItemSelectionModel>
 #include <QMenu>
 #include <QClipboard>
@@ -26,11 +25,6 @@ using namespace RenamingUtility;
 
 namespace QtGui {
 
-/*
-    TRANSLATOR QtGui::RenameFilesDialog
-    Necessary for lupdate.
-*/
-
 RenameFilesDialog::RenameFilesDialog(QWidget *parent) :
     QDialog(parent),
     m_ui(new Ui::RenameFilesDialog),
@@ -44,7 +38,7 @@ RenameFilesDialog::RenameFilesDialog(QWidget *parent) :
     setStyleSheet(dialogStyle() + QStringLiteral("QSplitter:handle { background-color: palette(base); }"));
 #endif
     // setup javascript editor and script file selection
-    QFont font("Courier", 10);
+    QFont font(QStringLiteral("Courier"), 10);
     font.setFixedPitch(true);
     m_ui->javaScriptPlainTextEdit->setFont(font);
     m_highlighter = new JavaScriptHighlighter(m_ui->javaScriptPlainTextEdit->document());
@@ -124,7 +118,6 @@ void RenameFilesDialog::startGeneratingPreview()
         QDir selectedDir(directory());
         m_ui->notificationLabel->setHidden(false);
         if(selectedDir.exists()) {
-            QScriptEngine engine;
             QString program;
             if(m_ui->sourceFileStackedWidget->currentIndex() == 0) {
                 program = m_ui->javaScriptPlainTextEdit->toPlainText();
@@ -143,18 +136,17 @@ void RenameFilesDialog::startGeneratingPreview()
                 }
             }
             if(!program.isEmpty()) {
-                QScriptSyntaxCheckResult res = engine.checkSyntax(program);
-                if(res.state() != QScriptSyntaxCheckResult::Error) {
+                if(m_engine->setProgram(program)) {
                     m_ui->notificationLabel->setText(tr("Generating preview ..."));
                     m_ui->notificationLabel->setNotificationType(NotificationType::Progress);
                     m_ui->abortClosePushButton->setText(tr("Abort"));
                     m_ui->generatePreviewPushButton->setHidden(true);
                     m_ui->applyChangingsPushButton->setHidden(true);
-                    m_engine->generatePreview(program, directory(), m_ui->includeSubdirsCheckBox->isChecked());
+                    m_engine->generatePreview(directory(), m_ui->includeSubdirsCheckBox->isChecked());
                 } else {
                     m_engine->clearPreview();
-                    m_ui->notificationLabel->setText(tr("The script is not valid.\nError in line %1 and column %2:\n %3")
-                                                    .arg(res.errorLineNumber()).arg(res.errorColumnNumber()).arg(res.errorMessage()));
+                    m_ui->notificationLabel->setText(tr("The script is not valid.\nError in line %1: %3")
+                                                    .arg(m_engine->errorLineNumber()).arg(m_engine->errorMessage()));
                     m_ui->notificationLabel->setNotificationType(NotificationType::Warning);
                 }
             } else {
@@ -191,7 +183,7 @@ void RenameFilesDialog::showPreviewProgress(int itemsProcessed, int errorsOccure
     m_errorsOccured = errorsOccured;
     QString text = tr("%1 files/directories processed", 0, itemsProcessed).arg(itemsProcessed);
     if(m_errorsOccured > 0) {
-        text.append(QStringLiteral("\n"));
+        text.append(QChar('\n'));
         text.append(tr("%1 error(s) occured", 0, errorsOccured).arg(errorsOccured));
     }
     m_ui->notificationLabel->setText(text);
diff --git a/gui/tagedit.cpp b/gui/tagedit.cpp
index cdf896a..f753c26 100644
--- a/gui/tagedit.cpp
+++ b/gui/tagedit.cpp
@@ -20,11 +20,6 @@ using namespace Media;
 
 namespace QtGui {
 
-/*
-    TRANSLATOR QtGui::TagEdit
-    Necessary for lupdate.
-*/
-
 /*!
  * \class QtGui::TagEdit
  * \brief The TagEdit widget allows the user to edit Media::Tag objects.
@@ -55,14 +50,6 @@ TagEdit::TagEdit(QWidget *parent) :
     setLayout(mainLayout);
 }
 
-/*!
- * \brief Destroys the tag edit.
- *
- * Does not destroy assigned tags.
- */
-TagEdit::~TagEdit()
-{}
-
 /*!
  * \brief Assigns the specified \a tag to the edit.
  * \param updateUi Specifies whether the UI of should be updated.
diff --git a/gui/tagedit.h b/gui/tagedit.h
index 92cdfa3..903d458 100644
--- a/gui/tagedit.h
+++ b/gui/tagedit.h
@@ -31,7 +31,6 @@ class TagEdit : public QWidget
 
 public:
     explicit TagEdit(QWidget *parent = nullptr);
-    ~TagEdit();
     const QList<Media::Tag *> &tags() const;
     void setTag(Media::Tag *tag, bool updateUi = true);
     void setTags(const QList<Media::Tag *> &tags, bool updateUi = true);
diff --git a/gui/tagfieldedit.cpp b/gui/tagfieldedit.cpp
index aeddea7..4c0c808 100644
--- a/gui/tagfieldedit.cpp
+++ b/gui/tagfieldedit.cpp
@@ -49,11 +49,6 @@ using namespace ConversionUtilities;
 
 namespace QtGui {
 
-/*
-    TRANSLATOR QtGui::TagFieldEdit
-    Necessary for lupdate.
-*/
-
 /*!
  * \class QtGui::TagFieldEdit
  * \brief The TagFieldEdit widget allows the user to edit a specified tag field.
@@ -83,14 +78,6 @@ TagFieldEdit::TagFieldEdit(const QList<Media::Tag *> &tags, Media::KnownField fi
     updateValue();
 }
 
-/*!
- * \brief Destroys the object.
- *
- * Does not destroy the assigned tags.
- */
-TagFieldEdit::~TagFieldEdit()
-{}
-
 /*!
  * \brief Assigns the specified \a tags and sets the specified \a fields using the given \a previousValueHandling.
  *
diff --git a/gui/tagfieldedit.h b/gui/tagfieldedit.h
index 5ee4996..fb95a19 100644
--- a/gui/tagfieldedit.h
+++ b/gui/tagfieldedit.h
@@ -39,7 +39,6 @@ class TagFieldEdit : public QWidget
 
 public:
     explicit TagFieldEdit(const QList<Media::Tag *> &tags, Media::KnownField field, QWidget *parent = nullptr);
-    virtual ~TagFieldEdit();
 
     const QList<Media::Tag *> &tags() const;
     Media::KnownField field() const;
diff --git a/renamingutility/filesystemitem.h b/renamingutility/filesystemitem.h
index 97061b5..c979fe2 100644
--- a/renamingutility/filesystemitem.h
+++ b/renamingutility/filesystemitem.h
@@ -7,6 +7,7 @@
 namespace RenamingUtility {
 
 enum class ActionType {
+    None,
     Rename,
     Skip
 };
diff --git a/renamingutility/renamingengine.cpp b/renamingutility/renamingengine.cpp
index 1a28b12..8a699d2 100644
--- a/renamingutility/renamingengine.cpp
+++ b/renamingutility/renamingengine.cpp
@@ -1,13 +1,12 @@
 #include "./renamingengine.h"
 #include "./filesystemitemmodel.h"
 #include "./filteredfilesystemitemmodel.h"
-#include "./scriptfunctions.h"
+#include "./tageditorobject.h"
 
 #include <c++utilities/misc/memory.h>
 
 #include <QDir>
-#include <QScriptEngine>
-#include <QScriptProgram>
+#include <QStringBuilder>
 
 #include <thread>
 
@@ -15,14 +14,10 @@ using namespace std;
 
 namespace RenamingUtility {
 
-/*
-    TRANSLATOR RenamingUtility::RemamingEngine
-    Necessary for lupdate.
-*/
-
 RemamingEngine::RemamingEngine(QObject *parent) :
     QObject(parent),
-    m_go(m_engine.globalObject()),
+    m_tagEditorQObj(new TagEditorObject(&m_engine)),
+    m_tagEditorJsObj(TAGEDITOR_JS_QOBJECT(m_engine, m_tagEditorQObj)),
     m_itemsProcessed(0),
     m_errorsOccured(0),
     m_aborted(false),
@@ -31,21 +26,40 @@ RemamingEngine::RemamingEngine(QObject *parent) :
     m_currentModel(nullptr),
     m_previewModel(nullptr)
 {
+    m_engine.globalObject().setProperty(QStringLiteral("tageditor"), m_tagEditorJsObj);
     connect(this, &RemamingEngine::previewGenerated, this, &RemamingEngine::processPreviewGenerated);
     connect(this, &RemamingEngine::changingsApplied, this, &RemamingEngine::processChangingsApplied);
 }
 
-RemamingEngine::~RemamingEngine()
-{}
+bool RemamingEngine::setProgram(const TAGEDITOR_JS_VALUE &program)
+{
+    if(TAGEDITOR_JS_IS_VALID_PROG(program)) {
+        m_errorMessage.clear();
+        m_errorLineNumber = 0;
+        m_program = program;
+        return true;
+    } else if(program.isError()) {
+        m_errorMessage = program.property(QStringLiteral("message")).toString();
+        m_errorLineNumber = TAGEDITOR_JS_INT(program.property(QStringLiteral("lineNumber")));
+    } else {
+        m_errorMessage = tr("Program is not callable.");
+        m_errorLineNumber = 0;
+    }
+    return false;
+}
 
-bool RemamingEngine::generatePreview(const QScriptProgram &scriptProgram, const QDir &rootDirectory, bool includeSubdirs)
+bool RemamingEngine::setProgram(const QString &program)
+{
+    return setProgram(m_engine.evaluate(QStringLiteral("(function(){") % program % QStringLiteral("})")));
+}
+
+bool RemamingEngine::generatePreview(const QDir &rootDirectory, bool includeSubdirs)
 {
     if(!m_mutex.try_lock()) {
         return false;
     }
     lock_guard<mutex> guard(m_mutex, adopt_lock);
     setRootItem();
-    m_program = scriptProgram;
     m_includeSubdirs = includeSubdirs;
     m_dir = rootDirectory;
     auto startFunc = [this] () {
@@ -54,7 +68,6 @@ bool RemamingEngine::generatePreview(const QScriptProgram &scriptProgram, const
             m_aborted.store(false);
             m_itemsProcessed = 0;
             m_errorsOccured = 0;
-            m_go.setProperty("persistent", m_persistent = m_engine.newObject(), QScriptValue::Undeletable);
             m_newlyGeneratedRootItem = generatePreview(m_dir);
         }
         emit previewGenerated();
@@ -174,8 +187,7 @@ unique_ptr<FileSystemItem> RemamingEngine::generatePreview(const QDir &dir, File
 {
     auto item = make_unique<FileSystemItem>(ItemStatus::Current, ItemType::Dir, dir.dirName(), parent);
     item->setApplied(false);
-    QFileInfoList entries = dir.entryInfoList();
-    foreach(const QFileInfo &entry, entries) {
+    for(const QFileInfo &entry : dir.entryInfoList()) {
         if(entry.fileName() == QLatin1String("..")
                 || entry.fileName() == QLatin1String(".")) {
             continue;
@@ -280,7 +292,7 @@ void RemamingEngine::applyChangings(FileSystemItem *parentItem)
 
 void RemamingEngine::setError(const QList<FileSystemItem *> items)
 {
-    foreach(FileSystemItem *item, items) {
+    for(FileSystemItem *item : items) {
         item->setErrorOccured(true);
         item->setNote(tr("skipped due to error of superior item"));
     }
@@ -288,33 +300,30 @@ void RemamingEngine::setError(const QList<FileSystemItem *> items)
 
 void RemamingEngine::executeScriptForItem(const QFileInfo &fileInfo, FileSystemItem *item)
 {
+    // make file info for the specified item available in the script
+    m_tagEditorQObj->setFileInfo(fileInfo, item);
     // execute script
-    setupGlobalObject(fileInfo, item);
-    QScriptValue res = m_engine.evaluate(m_program);
-    if(m_engine.hasUncaughtException()) {
+    auto scriptResult = m_program.call();
+    if(scriptResult.isError()) {
         // handle error
         item->setErrorOccured(true);
-        item->setNote(res.toString());
-        m_engine.clearExceptions();
+        item->setNote(scriptResult.toString());
     } else {
         // create preview for action
-        QScriptValue newName = m_go.property("newName");
-        QScriptValue newRelativeDirectory = m_go.property("newRelativeDirectory");
-        ActionType action = ActionType::Skip;
-        if(m_go.property("action").isNumber()) {
-            action = static_cast<ActionType>(m_go.property("action").toInt32());
-        }
-        switch(action) {
+        const QString &newName = m_tagEditorQObj->newName();
+        const QString &newRelativeDirectory = m_tagEditorQObj->newRelativeDirectory();
+        switch(m_tagEditorQObj->action()) {
+        case ActionType::None:
+            item->setNote(tr("no action specified"));
+            break;
         case ActionType::Rename:
-            if(newRelativeDirectory.isString()) {
-                FileSystemItem *counterpartParent = item->root()->makeChildAvailable(newRelativeDirectory.toString());
+            if(!newRelativeDirectory.isEmpty()) {
+                FileSystemItem *counterpartParent = item->root()->makeChildAvailable(newRelativeDirectory);
                 if(counterpartParent->status() == ItemStatus::New
                         && counterpartParent->note().isEmpty()) {
                     counterpartParent->setNote(tr("will be created"));
                 }
-                QString counterpartName = newName.isString()
-                        ? newName.toString()
-                        : item->name();
+                const QString &counterpartName = newName.isEmpty() ? item->name() : newName;
                 if(counterpartParent->findChild(counterpartName, item)) {
                     item->setNote(tr("name is already used at new location"));
                     item->setErrorOccured(true);
@@ -324,8 +333,8 @@ void RemamingEngine::executeScriptForItem(const QFileInfo &fileInfo, FileSystemI
                     counterpart->setCheckable(true);
                     counterpart->setChecked(true);
                 }
-            } else if(newName.isString()) {
-                item->setNewName(newName.toString());
+            } else if(!newName.isEmpty()) {
+                item->setNewName(newName);
             }
             if(FileSystemItem *newItem = item->counterpart()) {
                 if((newItem->name().isEmpty() || newItem->name() == item->name())
@@ -347,34 +356,8 @@ void RemamingEngine::executeScriptForItem(const QFileInfo &fileInfo, FileSystemI
             break;
         default:
             item->setNote(tr("skipped"));
-            break;
         }
     }
 }
 
-void RemamingEngine::setupGlobalObject(const QFileInfo &file, FileSystemItem *item)
-{
-    // create new global object to clean previous variables ...
-    m_go = m_engine.newObject();
-    // ... except the persistent object
-    m_go.setProperty("persistent", m_persistent, QScriptValue::Undeletable);
-    // provide properties/functions
-    m_go.setProperty("currentPath", file.absoluteFilePath(), QScriptValue::ReadOnly);
-    m_go.setProperty("currentName", item->name(), QScriptValue::ReadOnly);
-    m_go.setProperty("currentRelativeDirectory", item->relativeDir(), QScriptValue::ReadOnly);
-    m_go.setProperty("isDir", item->type() == ItemType::Dir, QScriptValue::ReadOnly);
-    m_go.setProperty("isFile", item->type() == ItemType::File, QScriptValue::ReadOnly);
-    m_go.setProperty("action", QScriptValue(static_cast<int>(ActionType::Rename)), QScriptValue::Undeletable);
-    m_go.setProperty("parseFileInfo", m_engine.newFunction(ScriptFunctions::parseFileInfo), QScriptValue::ReadOnly);
-    m_go.setProperty("parseFileName", m_engine.newFunction(ScriptFunctions::parseFileName), QScriptValue::ReadOnly);
-    m_go.setProperty("allFiles", m_engine.newFunction(ScriptFunctions::allFiles), QScriptValue::ReadOnly);
-    m_go.setProperty("firstFile", m_engine.newFunction(ScriptFunctions::firstFile), QScriptValue::ReadOnly);
-    m_go.setProperty("writeLog", m_engine.newFunction(ScriptFunctions::writeLog), QScriptValue::ReadOnly);
-    QScriptValue actionObject = m_engine.newObject();
-    actionObject.setProperty("rename", QScriptValue(static_cast<int>(ActionType::Rename)), QScriptValue::ReadOnly);
-    actionObject.setProperty("skip", QScriptValue(static_cast<int>(ActionType::Skip)), QScriptValue::ReadOnly);
-    m_go.setProperty("actionType", actionObject, QScriptValue::ReadOnly);
-    m_engine.setGlobalObject(m_go);
-}
-
 } // namespace RenamingUtility
diff --git a/renamingutility/renamingengine.h b/renamingutility/renamingengine.h
index 5253f38..e573f5b 100644
--- a/renamingutility/renamingengine.h
+++ b/renamingutility/renamingengine.h
@@ -2,26 +2,31 @@
 #define RENAMINGUTILITY_RENAMINGENGINE_H
 
 #include "./filesystemitem.h"
+#include "./scriptdefs.h"
 
 #include <QObject>
 #include <QList>
 #include <QDir>
-#include <QScriptProgram>
-#include <QScriptEngine>
-#include <QScriptValue>
+
+#if TAGEDITOR_USE_JSENGINE
+# include <QJSEngine>
+# include <QJSValue>
+#else
+# include <QScriptEngine>
+# include <QScriptValue>
+#endif
 
 #include <memory>
 #include <mutex>
 #include <atomic>
 
 QT_FORWARD_DECLARE_CLASS(QFileInfo)
-QT_FORWARD_DECLARE_CLASS(QScriptProgram)
-QT_FORWARD_DECLARE_CLASS(QScriptContext)
 
 namespace RenamingUtility {
 
 class FileSystemItemModel;
 class FilteredFileSystemItemModel;
+class TagEditorObject;
 
 class RemamingEngine : public QObject
 {
@@ -29,10 +34,11 @@ class RemamingEngine : public QObject
 
 public:
     RemamingEngine(QObject *parent = nullptr);
-    virtual ~RemamingEngine();
 
     FileSystemItem *rootItem() const;
-    const QScriptProgram &scriptProgram() const;
+    const TAGEDITOR_JS_VALUE &scriptProgram() const;
+    bool setProgram(const TAGEDITOR_JS_VALUE &program);
+    bool setProgram(const QString &program);
     const QDir &rootDirectory() const;
     bool subdirsIncluded() const;
     bool isBusy();
@@ -41,9 +47,11 @@ public:
     FileSystemItemModel *model();
     FilteredFileSystemItemModel *currentModel();
     FilteredFileSystemItemModel *previewModel();
+    const QString &errorMessage() const;
+    int errorLineNumber() const;
 
 public slots:
-    bool generatePreview(const QScriptProgram &scriptProgram, const QDir &rootDirectory, bool includeSubdirs);
+    bool generatePreview(const QDir &rootDirectory, bool includeSubdirs);
     bool applyChangings();
     void abort();
 
@@ -63,23 +71,24 @@ private:
     void applyChangings(FileSystemItem *parentItem);
     static void setError(const QList<FileSystemItem *> items);
     void executeScriptForItem(const QFileInfo &fileInfo, FileSystemItem *item);
-    void setupGlobalObject(const QFileInfo &file, FileSystemItem *item);
 
-    QScriptEngine m_engine;
-    QScriptValue m_go;
-    QScriptValue m_persistent;
+    TagEditorObject *m_tagEditorQObj;
+    TAGEDITOR_JS_ENGINE m_engine;
+    TAGEDITOR_JS_VALUE m_tagEditorJsObj;
     std::unique_ptr<FileSystemItem> m_rootItem;
     std::unique_ptr<FileSystemItem> m_newlyGeneratedRootItem;
     int m_itemsProcessed;
     int m_errorsOccured;
     std::atomic<bool> m_aborted;
-    QScriptProgram m_program;
+    TAGEDITOR_JS_VALUE m_program;
     QDir m_dir;
     bool m_includeSubdirs;
     std::mutex m_mutex;
     FileSystemItemModel *m_model;
     FilteredFileSystemItemModel *m_currentModel;
     FilteredFileSystemItemModel *m_previewModel;
+    QString m_errorMessage;
+    int m_errorLineNumber;
 };
 
 inline FileSystemItem *RemamingEngine::rootItem() const
@@ -87,7 +96,7 @@ inline FileSystemItem *RemamingEngine::rootItem() const
     return m_rootItem.get();
 }
 
-inline const QScriptProgram &RemamingEngine::scriptProgram() const
+inline const TAGEDITOR_JS_VALUE &RemamingEngine::scriptProgram() const
 {
     return m_program;
 }
@@ -102,6 +111,16 @@ inline bool RemamingEngine::subdirsIncluded() const
     return m_includeSubdirs;
 }
 
+inline const QString &RemamingEngine::errorMessage() const
+{
+    return m_errorMessage;
+}
+
+inline int RemamingEngine::errorLineNumber() const
+{
+    return m_errorLineNumber;
+}
+
 } // namespace RenamingUtility
 
 #endif // RENAMINGUTILITY_RENAMINGENGINE_H
diff --git a/renamingutility/scriptdefs.h b/renamingutility/scriptdefs.h
new file mode 100644
index 0000000..5bebbe1
--- /dev/null
+++ b/renamingutility/scriptdefs.h
@@ -0,0 +1,28 @@
+#ifndef SCRIPTDEFS_H
+#define SCRIPTDEFS_H
+
+#include <QtGlobal>
+
+#if TAGEDITOR_USE_JSENGINE
+# define TAGEDITOR_JS_ENGINE QJSEngine
+# define TAGEDITOR_JS_VALUE QJSValue
+# define TAGEDITOR_JS_READONLY
+# define TAGEDITOR_JS_UNDELETABLE
+# define TAGEDITOR_JS_QOBJECT(engine, obj) engine.newQObject(obj)
+# define TAGEDITOR_JS_INT(value) value.toInt()
+# define TAGEDITOR_JS_IS_VALID_PROG(program) (!program.isError() && program.isCallable())
+QT_FORWARD_DECLARE_CLASS(QJSValue)
+QT_FORWARD_DECLARE_CLASS(QJSEngine)
+#else
+# define TAGEDITOR_JS_ENGINE QScriptEngine
+# define TAGEDITOR_JS_VALUE QScriptValue
+# define TAGEDITOR_JS_READONLY ,QScriptValue::ReadOnly
+# define TAGEDITOR_JS_UNDELETABLE ,QScriptValue::Undeletable
+# define TAGEDITOR_JS_QOBJECT(engine, obj) engine.newQObject(obj, QScriptEngine::ScriptOwnership)
+# define TAGEDITOR_JS_INT(value) value.toInt32()
+# define TAGEDITOR_JS_IS_VALID_PROG(program) (!program.isError() && program.isFunction())
+QT_FORWARD_DECLARE_CLASS(QScriptValue)
+QT_FORWARD_DECLARE_CLASS(QScriptEngine)
+#endif
+
+#endif // SCRIPTDEFS_H
diff --git a/renamingutility/scriptfunctions.cpp b/renamingutility/scriptfunctions.cpp
deleted file mode 100644
index b44105f..0000000
--- a/renamingutility/scriptfunctions.cpp
+++ /dev/null
@@ -1,200 +0,0 @@
-#include "./scriptfunctions.h"
-
-#include "../misc/utility.h"
-
-#include <tagparser/mediafileinfo.h>
-#include <tagparser/tag.h>
-#include <tagparser/tagvalue.h>
-#include <tagparser/exceptions.h>
-
-#include <c++utilities/conversion/conversionexception.h>
-
-#include <QDir>
-#include <QScriptEngine>
-#include <QScriptContext>
-#include <QScriptValue>
-
-#include <iostream>
-
-using namespace ConversionUtilities;
-using namespace Utility;
-using namespace Media;
-using namespace std;
-
-namespace RenamingUtility {
-
-/*
-    TRANSLATOR RenamingUtility::ScriptFunctions
-    Necessary for lupdate.
-*/
-
-QScriptValue &operator <<(QScriptValue &notificationsObject, const StatusProvider &statusProvider)
-{
-    quint32 counter = 0;
-    for(const auto &notification : statusProvider.notifications()) {
-        QScriptValue val;
-        val.setProperty("msg", QString::fromLocal8Bit(notification.message().data()), QScriptValue::ReadOnly);
-        val.setProperty("critical", notification.type() == NotificationType::Critical, QScriptValue::ReadOnly);
-        notificationsObject.setProperty(counter, val);
-        ++counter;
-    }
-    return notificationsObject;
-}
-
-QScriptValue &operator <<(QScriptValue &tagObject, const Tag &tag)
-{
-    // text fields
-    tagObject.setProperty("title", tagValueToQString(tag.value(KnownField::Title)), QScriptValue::ReadOnly);
-    tagObject.setProperty("artist", tagValueToQString(tag.value(KnownField::Artist)), QScriptValue::ReadOnly);
-    tagObject.setProperty("album", tagValueToQString(tag.value(KnownField::Album)), QScriptValue::ReadOnly);
-    tagObject.setProperty("year", tagValueToQString(tag.value(KnownField::Year)), QScriptValue::ReadOnly);
-    tagObject.setProperty("comment", tagValueToQString(tag.value(KnownField::Comment)), QScriptValue::ReadOnly);
-    tagObject.setProperty("genre", tagValueToQString(tag.value(KnownField::Genre)), QScriptValue::ReadOnly);
-    tagObject.setProperty("encoder", tagValueToQString(tag.value(KnownField::Encoder)), QScriptValue::ReadOnly);
-    tagObject.setProperty("language", tagValueToQString(tag.value(KnownField::Language)), QScriptValue::ReadOnly);
-    tagObject.setProperty("descriptions", tagValueToQString(tag.value(KnownField::Description)), QScriptValue::ReadOnly);
-    // numeric fields
-    try {
-        tagObject.setProperty("partNumber", tag.value(KnownField::PartNumber).toInteger(), QScriptValue::ReadOnly);
-    } catch(ConversionException &) {}
-    try {
-        tagObject.setProperty("totalParts", tag.value(KnownField::TotalParts).toInteger(), QScriptValue::ReadOnly);
-    } catch(ConversionException &) {}
-    PositionInSet pos;
-    try {
-        pos = tag.value(KnownField::TrackPosition).toPositionIntSet();
-    } catch(ConversionException &) {}
-    tagObject.setProperty("trackPos", pos.position(), QScriptValue::ReadOnly);
-    tagObject.setProperty("trackTotal", pos.total(), QScriptValue::ReadOnly);
-    pos = PositionInSet();
-    try {
-        pos = tag.value(KnownField::DiskPosition).toPositionIntSet();
-    } catch(ConversionException &) {}
-    tagObject.setProperty("diskPos", pos.position(), QScriptValue::ReadOnly);
-    tagObject.setProperty("diskTotal", pos.total(), QScriptValue::ReadOnly);
-    // notifications
-    tagObject.setProperty("hasCriticalNotifications", tag.hasCriticalNotifications(), QScriptValue::ReadOnly);
-    return tagObject;
-}
-
-QScriptValue ScriptFunctions::parseFileInfo(QScriptContext *context, QScriptEngine *engine)
-{
-    if(context->argumentCount() != 1 && !context->argument(0).isString()) {
-        return QScriptValue();
-    }
-    auto fileName = context->argument(0).toString();
-    MediaFileInfo fileInfo(fileName.toLocal8Bit().data());
-
-    QScriptValue fileInfoObject = engine->newObject();
-    fileInfoObject.setProperty("currentName", QString::fromLocal8Bit(fileInfo.fileName(false).data()));
-    fileInfoObject.setProperty("currentBaseName", QString::fromLocal8Bit(fileInfo.fileName(true).data()));
-    QString suffix = QString::fromLocal8Bit(fileInfo.extension().data());
-    if(suffix.startsWith('.')) {
-        suffix.remove(0, 1);
-    }
-    fileInfoObject.setProperty("currentSuffix", suffix, QScriptValue::ReadOnly);
-    bool critical = false;
-    try {
-        fileInfo.parseEverything();
-    } catch(Failure &) {
-        // parsing notifications will be addded anyways
-        critical = true;
-    } catch(ios_base::failure &) {
-        critical = true;
-    }
-
-    QScriptValue mainNotificationObject = engine->newArray(fileInfo.notifications().size());
-    mainNotificationObject << fileInfo;
-    critical |= fileInfo.hasCriticalNotifications();
-    fileInfoObject.setProperty("hasCriticalNotifications", critical);
-    fileInfoObject.setProperty("notifications", mainNotificationObject);
-
-    fileInfoObject.setProperty("mimeType", QString::fromLocal8Bit(fileInfo.mimeType()), QScriptValue::ReadOnly);
-    fileInfoObject.setProperty("suitableSuffix", QString::fromLocal8Bit(fileInfo.containerFormatAbbreviation()), QScriptValue::ReadOnly);
-
-    vector<Tag *> tags;
-    fileInfo.tags(tags);
-    QScriptValue combinedTagObject = engine->newObject();
-    QScriptValue combinedTagNotifications = engine->newArray();
-    QScriptValue tagsObject = engine->newArray(tags.size());
-    uint32 tagIndex = 0;
-
-    for(auto tagIterator = tags.cbegin(), end = tags.cend(); tagIterator != end; ++tagIterator, ++tagIndex) {
-        const Tag &tag = **tagIterator;
-        QScriptValue tagObject = engine->newObject();
-        combinedTagObject << tag;
-        combinedTagNotifications << tag;
-        tagObject << tag;
-        QScriptValue tagNotificationsObject = engine->newArray(tag.notifications().size());
-        tagNotificationsObject << tag;
-        tagObject.setProperty("notifications", tagNotificationsObject, QScriptValue::ReadOnly);
-        tagsObject.setProperty(tagIndex, tagObject, QScriptValue::ReadOnly);
-    }
-    combinedTagObject.setProperty("notifications", combinedTagNotifications, QScriptValue::ReadOnly);
-    fileInfoObject.setProperty("tag", combinedTagObject, QScriptValue::ReadOnly);
-    fileInfoObject.setProperty("tags", tagsObject, QScriptValue::ReadOnly);
-    return fileInfoObject;
-}
-
-QScriptValue ScriptFunctions::parseFileName(QScriptContext *context, QScriptEngine *engine)
-{
-    if(context->argumentCount() != 1 && !context->argument(0).isString()) {
-        return QScriptValue();
-    }
-    QString fileName = context->argument(0).toString();
-    QString title;
-    int trackNumber = 0;
-    Utility::parseFileName(fileName, title, trackNumber);
-    QScriptValue result = engine->newObject();
-    result.setProperty("title", QScriptValue(title), QScriptValue::ReadOnly);
-    result.setProperty("trackPos", QScriptValue(trackNumber), QScriptValue::ReadOnly);
-    return result;
-}
-
-QScriptValue ScriptFunctions::allFiles(QScriptContext *context, QScriptEngine *engine)
-{
-    if(context->argumentCount() != 1 && !context->argument(0).isString()) {
-        return QScriptValue();
-    }
-    QString dirName = context->argument(0).toString();
-    QDir dir(dirName);
-    if(dir.exists()) {
-        QStringList files = dir.entryList(QDir::Files);
-        QScriptValue entriesObj = engine->newArray(files.length());
-        quint32 counter = 0;
-        foreach(const QString &file, files) {
-            entriesObj.setProperty(counter, file, QScriptValue::ReadOnly);
-            ++counter;
-        }
-        return entriesObj;
-    } else {
-        return QScriptValue();
-    }
-}
-
-QScriptValue ScriptFunctions::firstFile(QScriptContext *context, QScriptEngine *engine)
-{
-    if(context->argumentCount() != 1 && !context->argument(0).isString()) {
-        return QScriptValue();
-    }
-    QString dirName = context->argument(0).toString();
-    QDir dir(dirName);
-    if(dir.exists()) {
-        QStringList files = dir.entryList(QDir::Files);
-        if(files.length() > 0) {
-            return engine->newVariant(files.first());
-        }
-    }
-    return QScriptValue();
-}
-
-QScriptValue ScriptFunctions::writeLog(QScriptContext *context, QScriptEngine *)
-{
-    if(context->argumentCount() != 1 && !context->argument(0).isString()) {
-        return QScriptValue();
-    }
-    cout << context->argument(0).toString().toStdString() << endl;
-    return QScriptValue();
-}
-
-} // namespace RenamingUtility
diff --git a/renamingutility/scriptfunctions.h b/renamingutility/scriptfunctions.h
deleted file mode 100644
index 6ab501d..0000000
--- a/renamingutility/scriptfunctions.h
+++ /dev/null
@@ -1,26 +0,0 @@
-#ifndef RENAMINGUTILITY_SCRIPTFUNCTIONS_H
-#define RENAMINGUTILITY_SCRIPTFUNCTIONS_H
-
-#include <QtGlobal>
-
-QT_BEGIN_NAMESPACE
-class QScriptValue;
-class QScriptContext;
-class QScriptEngine;
-QT_END_NAMESPACE
-
-namespace RenamingUtility {
-
-class ScriptFunctions
-{
-public:
-    static QScriptValue parseFileInfo(QScriptContext *context, QScriptEngine *engine);
-    static QScriptValue parseFileName(QScriptContext *context, QScriptEngine *engine);
-    static QScriptValue allFiles(QScriptContext *context, QScriptEngine *engine);
-    static QScriptValue firstFile(QScriptContext *context, QScriptEngine *engine);
-    static QScriptValue writeLog(QScriptContext *context, QScriptEngine *);
-};
-
-} // namespace RenamingUtility
-
-#endif // RENAMINGUTILITY_SCRIPTFUNCTIONS_H
diff --git a/renamingutility/tageditorobject.cpp b/renamingutility/tageditorobject.cpp
new file mode 100644
index 0000000..1dc6478
--- /dev/null
+++ b/renamingutility/tageditorobject.cpp
@@ -0,0 +1,250 @@
+#include "./tageditorobject.h"
+#include "./filesystemitem.h"
+
+#include "../misc/utility.h"
+
+#include <tagparser/mediafileinfo.h>
+#include <tagparser/tag.h>
+#include <tagparser/tagvalue.h>
+#include <tagparser/exceptions.h>
+
+#include <c++utilities/conversion/conversionexception.h>
+
+#include <QDir>
+
+#ifdef TAGEDITOR_USE_JSENGINE
+# include <QJSEngine>
+# include <QJSValue>
+#else
+# include <QScriptEngine>
+# include <QScriptValue>
+#endif
+
+#include <iostream>
+
+using namespace ConversionUtilities;
+using namespace Utility;
+using namespace Media;
+using namespace std;
+
+namespace RenamingUtility {
+
+TAGEDITOR_JS_VALUE &operator <<(TAGEDITOR_JS_VALUE &notificationsObject, const StatusProvider &statusProvider)
+{
+    quint32 counter = 0;
+    for(const auto &notification : statusProvider.notifications()) {
+        TAGEDITOR_JS_VALUE val;
+        val.setProperty("msg", QString::fromLocal8Bit(notification.message().data()) TAGEDITOR_JS_READONLY);
+        val.setProperty("critical", notification.type() == NotificationType::Critical TAGEDITOR_JS_READONLY);
+        notificationsObject.setProperty(counter, val);
+        ++counter;
+    }
+    return notificationsObject;
+}
+
+TAGEDITOR_JS_VALUE &operator <<(TAGEDITOR_JS_VALUE &tagObject, const Tag &tag)
+{
+    // text fields
+    tagObject.setProperty("title", tagValueToQString(tag.value(KnownField::Title)) TAGEDITOR_JS_READONLY);
+    tagObject.setProperty("artist", tagValueToQString(tag.value(KnownField::Artist)) TAGEDITOR_JS_READONLY);
+    tagObject.setProperty("album", tagValueToQString(tag.value(KnownField::Album)) TAGEDITOR_JS_READONLY);
+    tagObject.setProperty("year", tagValueToQString(tag.value(KnownField::Year)) TAGEDITOR_JS_READONLY);
+    tagObject.setProperty("comment", tagValueToQString(tag.value(KnownField::Comment)) TAGEDITOR_JS_READONLY);
+    tagObject.setProperty("genre", tagValueToQString(tag.value(KnownField::Genre)) TAGEDITOR_JS_READONLY);
+    tagObject.setProperty("encoder", tagValueToQString(tag.value(KnownField::Encoder)) TAGEDITOR_JS_READONLY);
+    tagObject.setProperty("language", tagValueToQString(tag.value(KnownField::Language)) TAGEDITOR_JS_READONLY);
+    tagObject.setProperty("descriptions", tagValueToQString(tag.value(KnownField::Description)) TAGEDITOR_JS_READONLY);
+    // numeric fields
+    try {
+        tagObject.setProperty("partNumber", tag.value(KnownField::PartNumber).toInteger() TAGEDITOR_JS_READONLY);
+    } catch(ConversionException &) {}
+    try {
+        tagObject.setProperty("totalParts", tag.value(KnownField::TotalParts).toInteger() TAGEDITOR_JS_READONLY);
+    } catch(ConversionException &) {}
+    PositionInSet pos;
+    try {
+        pos = tag.value(KnownField::TrackPosition).toPositionIntSet();
+    } catch(ConversionException &) {}
+    tagObject.setProperty("trackPos", pos.position() TAGEDITOR_JS_READONLY);
+    tagObject.setProperty("trackTotal", pos.total() TAGEDITOR_JS_READONLY);
+    pos = PositionInSet();
+    try {
+        pos = tag.value(KnownField::DiskPosition).toPositionIntSet();
+    } catch(ConversionException &) {}
+    tagObject.setProperty("diskPos", pos.position() TAGEDITOR_JS_READONLY);
+    tagObject.setProperty("diskTotal", pos.total() TAGEDITOR_JS_READONLY);
+    // notifications
+    tagObject.setProperty("hasCriticalNotifications", tag.hasCriticalNotifications() TAGEDITOR_JS_READONLY);
+    return tagObject;
+}
+
+TagEditorObject::TagEditorObject(TAGEDITOR_JS_ENGINE *engine) :
+    m_engine(engine),
+    m_currentType(ItemType::Dir),
+    m_action(ActionType::None)
+{}
+
+void TagEditorObject::setFileInfo(const QFileInfo &file, FileSystemItem *item)
+{
+    m_currentPath = file.absoluteFilePath();
+    m_currentName = file.fileName();
+    m_currentRelativeDirectory = item->relativeDir();
+    m_currentType = item->type();
+    m_action = ActionType::None;
+    m_newName.clear();
+    m_newRelativeDirectory.clear();
+}
+
+const QString &TagEditorObject::currentPath() const
+{
+    return m_currentPath;
+}
+
+const QString &TagEditorObject::currentName() const
+{
+    return m_currentName;
+}
+
+const QString &TagEditorObject::currentRelativeDirectory() const
+{
+    return m_currentRelativeDirectory;
+}
+
+bool TagEditorObject::isDir() const
+{
+    return m_currentType == ItemType::Dir;
+}
+
+bool TagEditorObject::isFile() const
+{
+    return m_currentType == ItemType::File;
+}
+
+const QString &TagEditorObject::newName() const
+{
+    return m_newName;
+}
+
+const QString &TagEditorObject::newRelativeDirectory() const
+{
+    return m_newRelativeDirectory;
+}
+
+TAGEDITOR_JS_VALUE TagEditorObject::parseFileInfo(const QString &fileName)
+{
+    MediaFileInfo fileInfo(fileName.toLocal8Bit().data());
+
+    auto fileInfoObject = m_engine->newObject();
+    fileInfoObject.setProperty(QStringLiteral("currentName"), QString::fromLocal8Bit(fileInfo.fileName(false).data()));
+    fileInfoObject.setProperty(QStringLiteral("currentBaseName"), QString::fromLocal8Bit(fileInfo.fileName(true).data()));
+    QString suffix = QString::fromLocal8Bit(fileInfo.extension().data());
+    if(suffix.startsWith('.')) {
+        suffix.remove(0, 1);
+    }
+    fileInfoObject.setProperty(QStringLiteral("currentSuffix"), suffix TAGEDITOR_JS_READONLY);
+    bool critical = false;
+    try {
+        fileInfo.parseEverything();
+    } catch(Failure &) {
+        // parsing notifications will be addded anyways
+        critical = true;
+    } catch(ios_base::failure &) {
+        critical = true;
+    }
+
+    auto mainNotificationObject = m_engine->newArray(fileInfo.notifications().size());
+    mainNotificationObject << fileInfo;
+    critical |= fileInfo.hasCriticalNotifications();
+    fileInfoObject.setProperty(QStringLiteral("hasCriticalNotifications"), critical);
+    fileInfoObject.setProperty(QStringLiteral("notifications"), mainNotificationObject);
+
+    fileInfoObject.setProperty(QStringLiteral("mimeType"), QString::fromLocal8Bit(fileInfo.mimeType()) TAGEDITOR_JS_READONLY);
+    fileInfoObject.setProperty(QStringLiteral("suitableSuffix"), QString::fromLocal8Bit(fileInfo.containerFormatAbbreviation()) TAGEDITOR_JS_READONLY);
+
+    vector<Tag *> tags;
+    fileInfo.tags(tags);
+    auto combinedTagObject = m_engine->newObject();
+    auto combinedTagNotifications = m_engine->newArray();
+    auto tagsObject = m_engine->newArray(tags.size());
+    uint32 tagIndex = 0;
+
+    for(auto tagIterator = tags.cbegin(), end = tags.cend(); tagIterator != end; ++tagIterator, ++tagIndex) {
+        const Tag &tag = **tagIterator;
+        auto tagObject = m_engine->newObject();
+        combinedTagObject << tag;
+        combinedTagNotifications << tag;
+        tagObject << tag;
+        auto tagNotificationsObject = m_engine->newArray(tag.notifications().size());
+        tagNotificationsObject << tag;
+        tagObject.setProperty(QStringLiteral("notifications"), tagNotificationsObject TAGEDITOR_JS_READONLY);
+        tagsObject.setProperty(tagIndex, tagObject TAGEDITOR_JS_READONLY);
+    }
+    combinedTagObject.setProperty(QStringLiteral("notifications"), combinedTagNotifications TAGEDITOR_JS_READONLY);
+    fileInfoObject.setProperty(QStringLiteral("tag"), combinedTagObject TAGEDITOR_JS_READONLY);
+    fileInfoObject.setProperty(QStringLiteral("tags"), tagsObject TAGEDITOR_JS_READONLY);
+    return fileInfoObject;
+}
+
+TAGEDITOR_JS_VALUE TagEditorObject::parseFileName(const QString &fileName)
+{
+    QString title;
+    int trackNumber = 0;
+    Utility::parseFileName(fileName, title, trackNumber);
+    auto result = m_engine->newObject();
+    result.setProperty(QStringLiteral("title"), TAGEDITOR_JS_VALUE(title) TAGEDITOR_JS_READONLY);
+    result.setProperty(QStringLiteral("trackPos"), TAGEDITOR_JS_VALUE(trackNumber) TAGEDITOR_JS_READONLY);
+    return result;
+}
+
+TAGEDITOR_JS_VALUE TagEditorObject::allFiles(const QString &dirName)
+{
+    QDir dir(dirName);
+    if(dir.exists()) {
+        QStringList files = dir.entryList(QDir::Files);
+        auto entriesObj = m_engine->newArray(files.length());
+        quint32 counter = 0;
+        foreach(const QString &file, files) {
+            entriesObj.setProperty(counter, file TAGEDITOR_JS_READONLY);
+            ++counter;
+        }
+        return entriesObj;
+    } else {
+        return TAGEDITOR_JS_VALUE();
+    }
+}
+
+TAGEDITOR_JS_VALUE TagEditorObject::firstFile(const QString &dirName)
+{
+    QDir dir(dirName);
+    if(dir.exists()) {
+        QStringList files = dir.entryList(QDir::Files);
+        if(!files.empty()) {
+            return TAGEDITOR_JS_VALUE(files.first());
+        }
+    }
+    return TAGEDITOR_JS_VALUE();
+}
+
+void TagEditorObject::writeLog(const QString &message)
+{
+    cout << message.toStdString() << endl;
+}
+
+void TagEditorObject::rename(const QString &newName)
+{
+    m_newName = newName;
+    m_action = ActionType::Rename;
+}
+
+void TagEditorObject::move(const QString &newRelativeDirectory)
+{
+    m_newRelativeDirectory = newRelativeDirectory;
+    m_action = ActionType::Rename;
+}
+
+void TagEditorObject::skip()
+{
+    m_action = ActionType::Skip;
+}
+
+} // namespace RenamingUtility
diff --git a/renamingutility/tageditorobject.h b/renamingutility/tageditorobject.h
new file mode 100644
index 0000000..8d6c2e2
--- /dev/null
+++ b/renamingutility/tageditorobject.h
@@ -0,0 +1,75 @@
+#ifndef RENAMINGUTILITY_SCRIPTFUNCTIONS_H
+#define RENAMINGUTILITY_SCRIPTFUNCTIONS_H
+
+#include "./scriptdefs.h"
+
+#include <QObject>
+#ifdef TAGEDITOR_USE_JSENGINE
+# include <QJSValue>
+#else
+# include <QScriptValue>
+#endif
+
+QT_FORWARD_DECLARE_CLASS(QFileInfo)
+
+namespace RenamingUtility {
+
+class FileSystemItem;
+enum class ItemType;
+enum class ActionType;
+
+class TagEditorObject : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(QString currentPath READ currentPath)
+    Q_PROPERTY(QString currentName READ currentName)
+    Q_PROPERTY(QString currentRelativeDirectory READ currentRelativeDirectory)
+    Q_PROPERTY(bool isDir READ isDir)
+    Q_PROPERTY(bool isFile READ isFile)
+    Q_PROPERTY(QString newName READ newName WRITE rename)
+    Q_PROPERTY(QString newRelativeDirectory READ newRelativeDirectory WRITE move)
+
+public:
+    TagEditorObject(TAGEDITOR_JS_ENGINE *engine);
+
+    ActionType action() const;
+    void setFileInfo(const QFileInfo &file, FileSystemItem *item);
+
+    const QString &currentPath() const;
+    const QString &currentName() const;
+    const QString &currentRelativeDirectory() const;
+    bool isDir() const;
+    bool isFile() const;
+    const QString &newName() const;
+    const QString &newRelativeDirectory() const;
+
+public slots:
+    TAGEDITOR_JS_VALUE parseFileInfo(const QString &fileName);
+    TAGEDITOR_JS_VALUE parseFileName(const QString &fileName);
+    TAGEDITOR_JS_VALUE allFiles(const QString &dirName);
+    TAGEDITOR_JS_VALUE firstFile(const QString &dirName);
+    void writeLog(const QString &message);
+    void rename(const QString &newName);
+    void move(const QString &newRelativeDirectory);
+    void skip();
+
+
+private:
+    TAGEDITOR_JS_ENGINE *m_engine;
+    QString m_currentPath;
+    QString m_currentName;
+    QString m_currentRelativeDirectory;
+    ItemType m_currentType;
+    ActionType m_action;
+    QString m_newName;
+    QString m_newRelativeDirectory;
+};
+
+inline ActionType TagEditorObject::action() const
+{
+    return m_action;
+}
+
+} // namespace RenamingUtility
+
+#endif // RENAMINGUTILITY_SCRIPTFUNCTIONS_H
diff --git a/resources/scripts/renamefiles/example1.js b/resources/scripts/renamefiles/example1.js
index 9e8547b..6c91860 100644
--- a/resources/scripts/renamefiles/example1.js
+++ b/resources/scripts/renamefiles/example1.js
@@ -21,27 +21,27 @@ var distDir = false;
 // string used for "miscellaneous" category
 var misc = "misc";
 
-// define helper functions
+// define some helper functions
 
 /*!
- * \brief Returns whether the specified \a value is not undefined
-          and not an empty string.
+ * Returns whether the specified \a value is not undefined
+ * and not an empty string.
  */
 function notEmpty(value) {
     return value !== undefined && value !== "";
 }
  
 /*!
- * \brief Returns whether the specified \a value is not undefined
-          and not zero.
+ * Returns whether the specified \a value is not undefined
+ * and not zero.
  */
 function notNull(value) {
     return value !== undefined && value !== 0;
 }
 
 /*!
- * \brief Returns the string representation of \a pos using at least as
-          many digits as \a total has.
+ * Returns the string representation of \a pos using at least as
+ * many digits as \a total has.
  */
 function appropriateDigitCount(pos, total) {
     var res = pos + "";
@@ -53,8 +53,8 @@ function appropriateDigitCount(pos, total) {
 }
 
 /*!
- * \brief Returns a copy of the specified \a name with characters that might be
-          avoided in file names striped out.
+ * Returns a copy of the specified \a name with characters that might be
+ * avoided in file names striped out.
  */
 function validFileName(name) {
     if(name !== undefined) {
@@ -65,8 +65,8 @@ function validFileName(name) {
 }
 
 /*!
- * \brief Returns a copy of the specified \a name with characters that might be
-          avoided in directory names striped out.
+ * Returns a copy of the specified \a name with characters that might be
+ * avoided in directory names striped out.
  */
 function validDirectoryName(name) {
     if(name !== undefined) {
@@ -79,21 +79,21 @@ function validDirectoryName(name) {
 // the actual script
 
 // check whether we have to deal with a file or a directory
-if(isFile) {
+if(tageditor.isFile) {
     // parse file using the built-in parseFileInfo function
-    var fileInfo = parseFileInfo(currentPath);
+    var fileInfo = tageditor.parseFileInfo(tageditor.currentPath);
     var tag = fileInfo.tag; // get the tag information
     // read title and track number from the file name using the built-in parseFileName function
-    var infoFromFileName = parseFileName(fileInfo.currentBaseName);
+    var infoFromFileName = tageditor.parseFileName(fileInfo.currentBaseName);
     // read the suffix from the file info object to filter backup and temporary files
     if(fileInfo.currentName === "desktop.ini") {
-        action = actionType.skip; // skip these files
+        tageditor.skip(); // skip these files
     } else if(fileInfo.currentSuffix === "bak") {
-        // filter backup files by setting newRelativeDirectory to put them in a separate directory
-        newRelativeDirectory = "backups";
+        // filter backup by putting them in a separate directory
+        tageditor.move("backups");
     } else if(fileInfo.currentSuffix === "tmp") {
         // filter temporary files in the same way as backup files
-        newRelativeDirectory = "temp";
+        tageditor.move("temp");
     } else {
         // define an array for the fields; will be joined later
         var fields = [];
@@ -135,7 +135,7 @@ if(isFile) {
             fields.push(appropriateDigitCount(infoFromFileName.trackPos, 10));
         }
         // join the first part of the new name
-        newName = fields.join(separator);
+        var newName = fields.join(separator);
         // get the title
         var title = validFileName(tag.title);
         // append the title (if configured and present)
@@ -163,6 +163,8 @@ if(isFile) {
         if(notEmpty(suffix)) {
             newName = newName.concat(".", suffix);
         }
+        // apply new name
+        tageditor.rename(newName);
         // set the distribution directory
         if(distDir) {
             var path = [distDir];
@@ -185,13 +187,11 @@ if(isFile) {
             if(tag.diskTotal >= 2) {
                 path.push("Disk " + appropriateDigitCount(tag.diskPos, tag.diskTotal));
             }
-            newRelativeDirectory = path.join("/");
+            // apply new relative directory
+            tageditor.move(path.join("/"));
         }
     }
-    // set the action to "actionType.renaming"
-    // (this is the default action, actually there is no need to set it explicitly)
-    action = actionType.rename;
-} else if(isDir) {
-    // skip directories in this example script by setting the action to "actionType.skip"
-    action = actionType.skip;
+} else if(tageditor.isDir) {
+    // skip directories in this example script
+    tageditor.skip();
 }
diff --git a/tageditor.pro b/tageditor.pro
index 7b8ccb9..1f1fb83 100644
--- a/tageditor.pro
+++ b/tageditor.pro
@@ -15,7 +15,7 @@ VERSION = 1.3.0
 
 # basic configuration: application
 TEMPLATE = app
-QT += core gui widgets script
+QT += core gui widgets
 # use webkitwidgets if available; otherwise use webenginewidgets
 !forcewebengine:qtHaveModule(webkitwidgets) {
     QT += webkitwidgets
@@ -23,9 +23,17 @@ QT += core gui widgets script
     QT += webenginewidgets
     DEFINES += TAGEDITOR_USE_WEBENGINE
 }
+# use script if available; otherwise use qml
+!forcejsengine:qtHaveModule(script) {
+    QT += script
+} else {
+    QT += qml
+    DEFINES += TAGEDITOR_USE_JSENGINE
+}
 
 # add project files
-HEADERS += application/main.h \
+HEADERS += \
+    application/main.h \
     application/knownfieldmodel.h \
     application/settings.h \
     gui/filefilterproxymodel.h \
@@ -44,7 +52,8 @@ HEADERS += application/main.h \
     renamingutility/filesystemitemmodel.h \
     renamingutility/filteredfilesystemitemmodel.h \
     renamingutility/renamingengine.h \
-    renamingutility/scriptfunctions.h \
+    renamingutility/scriptdefs.h \
+    renamingutility/tageditorobject.h \
     misc/htmlinfo.h \
     gui/previousvaluehandling.h \
     gui/initiate.h \
@@ -55,7 +64,8 @@ HEADERS += application/main.h \
     gui/attachmentsedit.h \
     gui/codeedit.h
 
-SOURCES += application/main.cpp \
+SOURCES += \
+    application/main.cpp \
     application/knownfieldmodel.cpp \
     application/settings.cpp \
     gui/filefilterproxymodel.cpp \
@@ -74,9 +84,8 @@ SOURCES += application/main.cpp \
     renamingutility/filesystemitemmodel.cpp \
     renamingutility/filteredfilesystemitemmodel.cpp \
     renamingutility/renamingengine.cpp \
-    renamingutility/scriptfunctions.cpp \
+    renamingutility/tageditorobject.cpp \
     misc/htmlinfo.cpp \
-    gui/previousvaluehandling.cpp \
     gui/initiate.cpp \
     cli/mainfeatures.cpp \
     misc/utility.cpp \