diff --git a/src/plugins/cmakeprojectmanager/cmakeeditor.cpp b/src/plugins/cmakeprojectmanager/cmakeeditor.cpp
index 805b865adb1..760c4d32a04 100644
--- a/src/plugins/cmakeprojectmanager/cmakeeditor.cpp
+++ b/src/plugins/cmakeprojectmanager/cmakeeditor.cpp
@@ -66,9 +66,8 @@ CMakeEditor::CMakeEditor(CMakeEditorWidget *editor)
 
 Core::IEditor *CMakeEditor::duplicate()
 {
-    CMakeEditorWidget *w = qobject_cast<CMakeEditorWidget*>(widget());
-    CMakeEditorWidget *ret = new CMakeEditorWidget();
-    ret->duplicateFrom(w);
+    CMakeEditorWidget *ret = new CMakeEditorWidget(
+                qobject_cast<CMakeEditorWidget *>(editorWidget()));
     TextEditor::TextEditorSettings::initializeEditor(ret);
     return ret->editor();
 }
@@ -118,8 +117,18 @@ void CMakeEditor::build()
 CMakeEditorWidget::CMakeEditorWidget(QWidget *parent)
     : BaseTextEditorWidget(new CMakeDocument(), parent)
 {
-    baseTextDocument()->setSyntaxHighlighter(new CMakeHighlighter);
+    ctor();
+}
 
+CMakeEditorWidget::CMakeEditorWidget(CMakeEditorWidget *other)
+    : BaseTextEditorWidget(other)
+{
+    ctor();
+}
+
+void CMakeEditorWidget::ctor()
+{
+    baseTextDocument()->setSyntaxHighlighter(new CMakeHighlighter);
     m_commentDefinition.clearCommentStyles();
     m_commentDefinition.singleLine = QLatin1Char('#');
 }
diff --git a/src/plugins/cmakeprojectmanager/cmakeeditor.h b/src/plugins/cmakeprojectmanager/cmakeeditor.h
index 2dfe50b9d04..dffc1e95d8c 100644
--- a/src/plugins/cmakeprojectmanager/cmakeeditor.h
+++ b/src/plugins/cmakeprojectmanager/cmakeeditor.h
@@ -70,6 +70,7 @@ class CMakeEditorWidget : public TextEditor::BaseTextEditorWidget
 
 public:
     CMakeEditorWidget(QWidget *parent = 0);
+    CMakeEditorWidget(CMakeEditorWidget *other);
 
     bool save(const QString &fileName = QString());
 
@@ -83,6 +84,8 @@ public slots:
     void unCommentSelection();
 
 private:
+    CMakeEditorWidget(TextEditor::BaseTextEditorWidget *); // avoid stupidity
+    void ctor();
     Utils::CommentDefinition m_commentDefinition;
 };
 
diff --git a/src/plugins/cppeditor/cppeditor.cpp b/src/plugins/cppeditor/cppeditor.cpp
index 850e4bce64a..f7c2ab987e1 100644
--- a/src/plugins/cppeditor/cppeditor.cpp
+++ b/src/plugins/cppeditor/cppeditor.cpp
@@ -513,15 +513,27 @@ Q_GLOBAL_STATIC(CppTools::SymbolFinder, symbolFinder)
 
 CPPEditorWidget::CPPEditorWidget(QWidget *parent)
     : TextEditor::BaseTextEditorWidget(parent)
-    , m_currentRenameSelection(NoCurrentRenameSelection)
-    , m_inRename(false)
-    , m_inRenameChanged(false)
-    , m_firstRenameChange(false)
-    , m_objcEnabled(false)
-    , m_commentsSettings(CppTools::CppToolsSettings::instance()->commentsSettings())
-    , m_followSymbolUnderCursor(new FollowSymbolUnderCursor(this))
-    , m_preprocessorButton(0)
 {
+    ctor();
+}
+
+CPPEditorWidget::CPPEditorWidget(CPPEditorWidget *other)
+    : TextEditor::BaseTextEditorWidget(other)
+{
+    ctor();
+}
+
+void CPPEditorWidget::ctor()
+{
+    m_currentRenameSelection = NoCurrentRenameSelection;
+    m_inRename = false;
+    m_inRenameChanged = false;
+    m_firstRenameChange = false;
+    m_objcEnabled = false;
+    m_commentsSettings = CppTools::CppToolsSettings::instance()->commentsSettings();
+    m_followSymbolUnderCursor.reset(new FollowSymbolUnderCursor(this));
+    m_preprocessorButton = 0;
+
     qRegisterMetaType<SemanticInfo>("CppTools::SemanticInfo");
 
     setParenthesesMatchingEnabled(true);
@@ -640,7 +652,8 @@ void CPPEditorWidget::createToolBar(CPPEditor *editor)
     connect(m_outlineCombo, SIGNAL(currentIndexChanged(int)), this, SLOT(updateOutlineToolTip()));
 
     // set up slots to document changes
-    updateContentsChangedSignal();
+    connect(document(), SIGNAL(contentsChange(int,int,int)),
+            this, SLOT(onContentsChanged(int,int,int)));
 
     // set up function declaration - definition link
     connect(this, SIGNAL(cursorPositionChanged()), this, SLOT(updateFunctionDeclDefLink()));
@@ -1501,10 +1514,8 @@ void CPPEditorWidget::keyPressEvent(QKeyEvent *e)
 
 Core::IEditor *CPPEditor::duplicate()
 {
-    CPPEditorWidget *newEditor = new CPPEditorWidget();
-    newEditor->duplicateFrom(editorWidget());
-    // A new QTextDocument was set, so update our signal/slot connection to the new document
-    newEditor->updateContentsChangedSignal();
+    CPPEditorWidget *newEditor = new CPPEditorWidget(
+                qobject_cast<CPPEditorWidget *>(editorWidget()));
     CppEditorPlugin::instance()->initializeEditor(newEditor);
     return newEditor->editor();
 }
@@ -1860,12 +1871,6 @@ void CPPEditorWidget::applyDeclDefLinkChanges(bool jumpToMatch)
     updateFunctionDeclDefLink();
 }
 
-void CPPEditorWidget::updateContentsChangedSignal()
-{
-    connect(document(), SIGNAL(contentsChange(int,int,int)),
-            this, SLOT(onContentsChanged(int,int,int)));
-}
-
 FollowSymbolUnderCursor *CPPEditorWidget::followSymbolUnderCursorDelegate()
 {
     return m_followSymbolUnderCursor.data();
diff --git a/src/plugins/cppeditor/cppeditor.h b/src/plugins/cppeditor/cppeditor.h
index 7a08c6c1a91..057f9784234 100644
--- a/src/plugins/cppeditor/cppeditor.h
+++ b/src/plugins/cppeditor/cppeditor.h
@@ -98,6 +98,7 @@ public:
     typedef TextEditor::TabSettings TabSettings;
 
     CPPEditorWidget(QWidget *parent = 0);
+    CPPEditorWidget(CPPEditorWidget *other);
     ~CPPEditorWidget();
     void unCommentSelection();
 
@@ -130,8 +131,6 @@ public:
     QSharedPointer<FunctionDeclDefLink> declDefLink() const;
     void applyDeclDefLinkChanges(bool jumpToMatch);
 
-    void updateContentsChangedSignal();
-
     FollowSymbolUnderCursor *followSymbolUnderCursorDelegate(); // exposed for tests
 
 Q_SIGNALS:
@@ -191,6 +190,8 @@ private Q_SLOTS:
     void onCommentsSettingsChanged(const CppTools::CommentsSettings &settings);
 
 private:
+    CPPEditorWidget(TextEditor::BaseTextEditorWidget *); // avoid stupidity
+    void ctor();
     void markSymbols(const QTextCursor &tc, const CppTools::SemanticInfo &info);
     bool sortedOutline() const;
 
diff --git a/src/plugins/genericprojectmanager/genericprojectfileseditor.cpp b/src/plugins/genericprojectmanager/genericprojectfileseditor.cpp
index 6ef0c59eb0d..958b6c40635 100644
--- a/src/plugins/genericprojectmanager/genericprojectfileseditor.cpp
+++ b/src/plugins/genericprojectmanager/genericprojectfileseditor.cpp
@@ -93,9 +93,8 @@ bool ProjectFilesEditor::duplicateSupported() const
 
 Core::IEditor *ProjectFilesEditor::duplicate()
 {
-    ProjectFilesEditorWidget *parentEditor = qobject_cast<ProjectFilesEditorWidget *>(editorWidget());
-    ProjectFilesEditorWidget *editor = new ProjectFilesEditorWidget();
-    editor->duplicateFrom(parentEditor);
+    ProjectFilesEditorWidget *editor = new ProjectFilesEditorWidget(
+                qobject_cast<ProjectFilesEditorWidget *>(editorWidget()));
     TextEditorSettings::initializeEditor(editor);
     return editor->editor();
 }
@@ -111,6 +110,11 @@ ProjectFilesEditorWidget::ProjectFilesEditorWidget(QWidget *parent)
 {
 }
 
+ProjectFilesEditorWidget::ProjectFilesEditorWidget(ProjectFilesEditorWidget *other)
+    : BaseTextEditorWidget(other)
+{
+}
+
 BaseTextEditor *ProjectFilesEditorWidget::createEditor()
 {
     return new ProjectFilesEditor(this);
diff --git a/src/plugins/genericprojectmanager/genericprojectfileseditor.h b/src/plugins/genericprojectmanager/genericprojectfileseditor.h
index c81b87a4659..1236a8a9241 100644
--- a/src/plugins/genericprojectmanager/genericprojectfileseditor.h
+++ b/src/plugins/genericprojectmanager/genericprojectfileseditor.h
@@ -70,8 +70,12 @@ class ProjectFilesEditorWidget : public TextEditor::BaseTextEditorWidget
 
 public:
     ProjectFilesEditorWidget(QWidget *parent = 0);
+    ProjectFilesEditorWidget(ProjectFilesEditorWidget *other);
 
     TextEditor::BaseTextEditor *createEditor();
+
+private:
+    ProjectFilesEditorWidget(TextEditor::BaseTextEditorWidget *); // avoid stupidity
 };
 
 } // namespace Internal
diff --git a/src/plugins/glsleditor/glsleditor.cpp b/src/plugins/glsleditor/glsleditor.cpp
index 471da951580..0aca114e5fa 100644
--- a/src/plugins/glsleditor/glsleditor.cpp
+++ b/src/plugins/glsleditor/glsleditor.cpp
@@ -140,10 +140,21 @@ void Document::addRange(const QTextCursor &cursor, GLSL::Scope *scope)
     _cursors.append(c);
 }
 
-GLSLTextEditorWidget::GLSLTextEditorWidget(QWidget *parent) :
-    TextEditor::BaseTextEditorWidget(parent),
-    m_outlineCombo(0)
+GLSLTextEditorWidget::GLSLTextEditorWidget(QWidget *parent)
+    : TextEditor::BaseTextEditorWidget(parent)
 {
+    ctor();
+}
+
+GLSLTextEditorWidget::GLSLTextEditorWidget(GLSLTextEditorWidget *other)
+    : TextEditor::BaseTextEditorWidget(other)
+{
+    ctor();
+}
+
+void GLSLTextEditorWidget::ctor()
+{
+    m_outlineCombo = 0;
     setParenthesesMatchingEnabled(true);
     setMarksVisible(true);
     setCodeFoldingSupported(true);
@@ -189,8 +200,8 @@ bool GLSLTextEditorWidget::isOutdated() const
 
 Core::IEditor *GLSLEditorEditable::duplicate()
 {
-    GLSLTextEditorWidget *newEditor = new GLSLTextEditorWidget();
-    newEditor->duplicateFrom(editorWidget());
+    GLSLTextEditorWidget *newEditor = new GLSLTextEditorWidget(
+                qobject_cast<GLSLTextEditorWidget *>(editorWidget()));
     TextEditor::TextEditorSettings::initializeEditor(newEditor);
     return newEditor->editor();
 }
diff --git a/src/plugins/glsleditor/glsleditor.h b/src/plugins/glsleditor/glsleditor.h
index 5d1b9306a97..831b6e7d04c 100644
--- a/src/plugins/glsleditor/glsleditor.h
+++ b/src/plugins/glsleditor/glsleditor.h
@@ -87,6 +87,7 @@ class GLSLTextEditorWidget : public TextEditor::BaseTextEditorWidget
 
 public:
     GLSLTextEditorWidget(QWidget *parent = 0);
+    GLSLTextEditorWidget(GLSLTextEditorWidget *other);
     ~GLSLTextEditorWidget();
 
     virtual void unCommentSelection();
@@ -110,6 +111,8 @@ protected:
     void createToolBar(Internal::GLSLEditorEditable *editable);
 
 private:
+    GLSLTextEditorWidget(TextEditor::BaseTextEditorWidget *); // avoid stupidity
+    void ctor();
     void setSelectedElements();
     QString wordUnderCursor() const;
 
diff --git a/src/plugins/pythoneditor/pythoneditor.cpp b/src/plugins/pythoneditor/pythoneditor.cpp
index 26f9b5ffd0d..a75c324ba2d 100644
--- a/src/plugins/pythoneditor/pythoneditor.cpp
+++ b/src/plugins/pythoneditor/pythoneditor.cpp
@@ -60,10 +60,8 @@ PythonEditor::~PythonEditor()
 
 Core::IEditor *PythonEditor::duplicate()
 {
-    EditorWidget *widget = new EditorWidget();
-    widget->duplicateFrom(editorWidget());
+    EditorWidget *widget = new EditorWidget(qobject_cast<EditorWidget *>(editorWidget()));
     TextEditor::TextEditorSettings::initializeEditor(widget);
-
     return widget->editor();
 }
 
diff --git a/src/plugins/pythoneditor/pythoneditorwidget.cpp b/src/plugins/pythoneditor/pythoneditorwidget.cpp
index 8c37ab7be5a..4e5b119f3ed 100644
--- a/src/plugins/pythoneditor/pythoneditorwidget.cpp
+++ b/src/plugins/pythoneditor/pythoneditorwidget.cpp
@@ -48,7 +48,18 @@ namespace PythonEditor {
 namespace Internal {
 
 EditorWidget::EditorWidget(QWidget *parent)
-    :TextEditor::BaseTextEditorWidget(parent)
+    : TextEditor::BaseTextEditorWidget(parent)
+{
+    ctor();
+}
+
+EditorWidget::EditorWidget(EditorWidget *other)
+    : TextEditor::BaseTextEditorWidget(other)
+{
+    ctor();
+}
+
+void EditorWidget::ctor()
 {
     m_commentDefinition.multiLineStart.clear();
     m_commentDefinition.multiLineEnd.clear();
diff --git a/src/plugins/pythoneditor/pythoneditorwidget.h b/src/plugins/pythoneditor/pythoneditorwidget.h
index ebb76626cda..272eb3c8a48 100644
--- a/src/plugins/pythoneditor/pythoneditorwidget.h
+++ b/src/plugins/pythoneditor/pythoneditorwidget.h
@@ -42,6 +42,7 @@ class EditorWidget : public TextEditor::BaseTextEditorWidget
 
 public:
     EditorWidget(QWidget *parent = 0);
+    EditorWidget(EditorWidget *other);
     virtual ~EditorWidget();
 
     virtual void unCommentSelection();
@@ -53,6 +54,8 @@ protected:
     TextEditor::BaseTextEditor *createEditor();
 
 private:
+    EditorWidget(TextEditor::BaseTextEditorWidget *); // avoid stupidity
+    void ctor();
     Utils::CommentDefinition m_commentDefinition;
 };
 
diff --git a/src/plugins/qmakeprojectmanager/profileeditor.cpp b/src/plugins/qmakeprojectmanager/profileeditor.cpp
index 55c4cfb8016..c9428cb4b97 100644
--- a/src/plugins/qmakeprojectmanager/profileeditor.cpp
+++ b/src/plugins/qmakeprojectmanager/profileeditor.cpp
@@ -61,8 +61,8 @@ ProFileEditor::ProFileEditor(ProFileEditorWidget *editor)
 
 Core::IEditor *ProFileEditor::duplicate()
 {
-    ProFileEditorWidget *ret = new ProFileEditorWidget();
-    ret->duplicateFrom(editorWidget());
+    ProFileEditorWidget *ret = new ProFileEditorWidget(
+                qobject_cast<ProFileEditorWidget*>(editorWidget()));
     TextEditor::TextEditorSettings::initializeEditor(ret);
     return ret->editor();
 }
@@ -83,6 +83,17 @@ TextEditor::CompletionAssistProvider *ProFileEditor::completionAssistProvider()
 
 ProFileEditorWidget::ProFileEditorWidget(QWidget *parent)
     : BaseTextEditorWidget(new ProFileDocument(), parent)
+{
+    ctor();
+}
+
+ProFileEditorWidget::ProFileEditorWidget(ProFileEditorWidget *other)
+    : BaseTextEditorWidget(other)
+{
+    ctor();
+}
+
+void ProFileEditorWidget::ctor()
 {
     baseTextDocument()->setSyntaxHighlighter(new ProFileHighlighter);
     m_commentDefinition.clearCommentStyles();
diff --git a/src/plugins/qmakeprojectmanager/profileeditor.h b/src/plugins/qmakeprojectmanager/profileeditor.h
index b13826e3dd6..a45e83075b7 100644
--- a/src/plugins/qmakeprojectmanager/profileeditor.h
+++ b/src/plugins/qmakeprojectmanager/profileeditor.h
@@ -59,6 +59,7 @@ class ProFileEditorWidget : public TextEditor::BaseTextEditorWidget
 
 public:
     ProFileEditorWidget(QWidget *parent = 0);
+    ProFileEditorWidget(ProFileEditorWidget *other);
 
     void unCommentSelection();
 
@@ -69,6 +70,8 @@ protected:
     void contextMenuEvent(QContextMenuEvent *);
 
 private:
+    ProFileEditorWidget(BaseTextEditorWidget *); // avoid stupidity
+    void ctor();
     Utils::CommentDefinition m_commentDefinition;
 };
 
diff --git a/src/plugins/qmljseditor/qmljseditor.cpp b/src/plugins/qmljseditor/qmljseditor.cpp
index 061bf76054d..1ed5aa94681 100644
--- a/src/plugins/qmljseditor/qmljseditor.cpp
+++ b/src/plugins/qmljseditor/qmljseditor.cpp
@@ -450,15 +450,26 @@ protected:
 
 
 QmlJSTextEditorWidget::QmlJSTextEditorWidget(QWidget *parent) :
-    TextEditor::BaseTextEditorWidget(parent),
-    m_outlineCombo(0),
-    m_outlineModel(new QmlOutlineModel(this)),
-    m_modelManager(0),
-    m_futureSemanticInfoRevision(0),
-    m_contextPane(0),
-    m_findReferences(new FindReferences(this)),
-    m_semanticHighlighter(new SemanticHighlighter(this))
+    TextEditor::BaseTextEditorWidget(parent)
 {
+    ctor();
+}
+
+QmlJSTextEditorWidget::QmlJSTextEditorWidget(QmlJSTextEditorWidget *other)
+    : TextEditor::BaseTextEditorWidget(other)
+{
+    ctor();
+}
+
+void QmlJSTextEditorWidget::ctor()
+{
+    m_outlineCombo = 0;
+    m_outlineModel = new QmlOutlineModel(this);
+    m_futureSemanticInfoRevision = 0;
+    m_contextPane = 0;
+    m_findReferences = new FindReferences(this);
+    m_semanticHighlighter = new SemanticHighlighter(this);
+
     m_semanticInfoUpdater = new SemanticInfoUpdater(this);
     m_semanticInfoUpdater->start();
 
@@ -583,8 +594,8 @@ QModelIndex QmlJSTextEditorWidget::outlineModelIndex()
 
 IEditor *QmlJSEditor::duplicate()
 {
-    QmlJSTextEditorWidget *newEditor = new QmlJSTextEditorWidget();
-    newEditor->duplicateFrom(editorWidget());
+    QmlJSTextEditorWidget *newEditor = new QmlJSTextEditorWidget(
+                qobject_cast<QmlJSTextEditorWidget *>(editorWidget()));
     TextEditor::TextEditorSettings::initializeEditor(newEditor);
     return newEditor->editor();
 }
diff --git a/src/plugins/qmljseditor/qmljseditor.h b/src/plugins/qmljseditor/qmljseditor.h
index 6b9981ded71..4880ab0988b 100644
--- a/src/plugins/qmljseditor/qmljseditor.h
+++ b/src/plugins/qmljseditor/qmljseditor.h
@@ -100,6 +100,7 @@ class QMLJSEDITOR_EXPORT QmlJSTextEditorWidget : public TextEditor::BaseTextEdit
 
 public:
     QmlJSTextEditorWidget(QWidget *parent = 0);
+    QmlJSTextEditorWidget(QmlJSTextEditorWidget *other);
     ~QmlJSTextEditorWidget();
 
     virtual void unCommentSelection();
@@ -166,6 +167,8 @@ protected:
     QString foldReplacementText(const QTextBlock &block) const;
 
 private:
+    QmlJSTextEditorWidget(TextEditor::BaseTextEditorWidget *); // avoid stupidity
+    void ctor();
     bool isClosingBrace(const QList<QmlJS::Token> &tokens) const;
 
     void setSelectedElements();
diff --git a/src/plugins/texteditor/basetexteditor.cpp b/src/plugins/texteditor/basetexteditor.cpp
index 167a436c579..c374fa1775f 100644
--- a/src/plugins/texteditor/basetexteditor.cpp
+++ b/src/plugins/texteditor/basetexteditor.cpp
@@ -200,6 +200,12 @@ BaseTextEditorWidget::BaseTextEditorWidget(BaseTextDocument *doc, QWidget *paren
     ctor(QSharedPointer<BaseTextDocument>(doc));
 }
 
+BaseTextEditorWidget::BaseTextEditorWidget(BaseTextEditorWidget *other)
+{
+    ctor(other->d->m_document);
+    d->m_revisionsVisible = other->d->m_revisionsVisible;
+}
+
 void BaseTextEditorWidget::ctor(const QSharedPointer<BaseTextDocument> &doc)
 {
     d = new BaseTextEditorWidgetPrivate;
@@ -214,7 +220,7 @@ void BaseTextEditorWidget::ctor(const QSharedPointer<BaseTextDocument> &doc)
     d->m_refactorOverlay = new RefactorOverlay(this);
 
     d->m_document = doc;
-    d->setupDocumentSignals(d->m_document);
+    d->setupDocumentSignals();
 
     d->m_lastScrollPos = -1;
 
@@ -2079,17 +2085,6 @@ bool BaseTextEditorWidget::event(QEvent *e)
     return QPlainTextEdit::event(e);
 }
 
-void BaseTextEditorWidget::duplicateFrom(BaseTextEditorWidget *widget)
-{
-    if (this == widget)
-        return;
-    d->m_revisionsVisible = widget->d->m_revisionsVisible;
-    if (d->m_document == widget->d->m_document)
-        return;
-    d->setupDocumentSignals(widget->d->m_document);
-    d->m_document = widget->d->m_document;
-}
-
 void BaseTextEditorWidget::documentAboutToBeReloaded()
 {
     //memorize cursor position
@@ -2456,16 +2451,9 @@ BaseTextEditorWidgetPrivate::~BaseTextEditorWidgetPrivate()
 {
 }
 
-void BaseTextEditorWidgetPrivate::setupDocumentSignals(const QSharedPointer<BaseTextDocument> &document)
+void BaseTextEditorWidgetPrivate::setupDocumentSignals()
 {
-    BaseTextDocument *oldDocument = q->baseTextDocument();
-    if (oldDocument) {
-        q->disconnect(oldDocument->document(), 0, q, 0);
-        q->disconnect(oldDocument, 0, q, 0);
-        q->disconnect(q, 0, oldDocument, 0);
-    }
-
-    QTextDocument *doc = document->document();
+    QTextDocument *doc = m_document->document();
     q->setDocument(doc);
     q->setCursorWidth(2); // Applies to the document layout
 
@@ -2477,8 +2465,8 @@ void BaseTextEditorWidgetPrivate::setupDocumentSignals(const QSharedPointer<Base
     QObject::connect(doc, SIGNAL(modificationChanged(bool)), q, SIGNAL(changed()));
     QObject::connect(doc, SIGNAL(contentsChange(int,int,int)), q,
         SLOT(editorContentsChange(int,int,int)), Qt::DirectConnection);
-    QObject::connect(document.data(), SIGNAL(aboutToReload()), q, SLOT(documentAboutToBeReloaded()));
-    QObject::connect(document.data(), SIGNAL(reloadFinished(bool)), q, SLOT(documentReloadFinished(bool)));
+    QObject::connect(m_document.data(), SIGNAL(aboutToReload()), q, SLOT(documentAboutToBeReloaded()));
+    QObject::connect(m_document.data(), SIGNAL(reloadFinished(bool)), q, SLOT(documentReloadFinished(bool)));
     q->slotUpdateExtraAreaWidth();
 }
 
diff --git a/src/plugins/texteditor/basetexteditor.h b/src/plugins/texteditor/basetexteditor.h
index 0f01d11ea12..be0dbae9184 100644
--- a/src/plugins/texteditor/basetexteditor.h
+++ b/src/plugins/texteditor/basetexteditor.h
@@ -132,6 +132,7 @@ class TEXTEDITOR_EXPORT BaseTextEditorWidget : public QPlainTextEdit
 public:
     BaseTextEditorWidget(QWidget *parent = 0);
     BaseTextEditorWidget(BaseTextDocument *doc, QWidget *parent = 0);
+    BaseTextEditorWidget(BaseTextEditorWidget *other);
     ~BaseTextEditorWidget();
 
     const Utils::ChangeSet &changeSet() const;
@@ -356,9 +357,6 @@ private:
     void updateCannotDecodeInfo();
     void collectToCircularClipboard();
 
-public:
-    void duplicateFrom(BaseTextEditorWidget *editor);
-
 protected:
     void setDefaultPath(const QString &defaultPath);
 
diff --git a/src/plugins/texteditor/basetexteditor_p.h b/src/plugins/texteditor/basetexteditor_p.h
index be90639735e..8d476bab311 100644
--- a/src/plugins/texteditor/basetexteditor_p.h
+++ b/src/plugins/texteditor/basetexteditor_p.h
@@ -102,7 +102,7 @@ public:
     BaseTextEditorWidgetPrivate();
     ~BaseTextEditorWidgetPrivate();
 
-    void setupDocumentSignals(const QSharedPointer<BaseTextDocument> &document);
+    void setupDocumentSignals();
     void updateLineSelectionColor();
 
     void print(QPrinter *printer);
diff --git a/src/plugins/texteditor/plaintexteditor.cpp b/src/plugins/texteditor/plaintexteditor.cpp
index 5d618d2c4db..09d0f5b7bec 100644
--- a/src/plugins/texteditor/plaintexteditor.cpp
+++ b/src/plugins/texteditor/plaintexteditor.cpp
@@ -69,6 +69,12 @@ PlainTextEditorWidget::PlainTextEditorWidget(BaseTextDocument *doc, QWidget *par
     ctor();
 }
 
+PlainTextEditorWidget::PlainTextEditorWidget(PlainTextEditorWidget *other)
+    : BaseTextEditorWidget(other)
+{
+    ctor();
+}
+
 void PlainTextEditorWidget::ctor()
 {
     m_isMissingSyntaxDefinition = false;
@@ -88,8 +94,8 @@ void PlainTextEditorWidget::ctor()
 
 IEditor *PlainTextEditor::duplicate()
 {
-    PlainTextEditorWidget *newWidget = new PlainTextEditorWidget();
-    newWidget->duplicateFrom(editorWidget());
+    PlainTextEditorWidget *newWidget = new PlainTextEditorWidget(
+                qobject_cast<PlainTextEditorWidget *>(editorWidget()));
     TextEditorSettings::initializeEditor(newWidget);
     return newWidget->editor();
 }
diff --git a/src/plugins/texteditor/plaintexteditor.h b/src/plugins/texteditor/plaintexteditor.h
index 88118054e00..e56b552bd63 100644
--- a/src/plugins/texteditor/plaintexteditor.h
+++ b/src/plugins/texteditor/plaintexteditor.h
@@ -61,6 +61,7 @@ class TEXTEDITOR_EXPORT PlainTextEditorWidget : public BaseTextEditorWidget
 public:
     PlainTextEditorWidget(QWidget *parent = 0);
     PlainTextEditorWidget(BaseTextDocument *doc, QWidget *parent = 0);
+    PlainTextEditorWidget(PlainTextEditorWidget *other);
 
     void configure(const QString& mimeType);
     void configure(const Core::MimeType &mimeType);
@@ -81,6 +82,7 @@ protected:
     virtual BaseTextEditor *createEditor() { return new PlainTextEditor(this); }
 
 private:
+    PlainTextEditorWidget(TextEditor::BaseTextEditorWidget *); // avoid stupidity
     void ctor();
 
     bool m_isMissingSyntaxDefinition;