diff --git a/src/plugins/qmldesigner/designercore/include/textmodifier.h b/src/plugins/qmldesigner/designercore/include/textmodifier.h
index 98a9d671a77..c5d494e0e56 100644
--- a/src/plugins/qmldesigner/designercore/include/textmodifier.h
+++ b/src/plugins/qmldesigner/designercore/include/textmodifier.h
@@ -74,6 +74,7 @@ public:
     virtual QTextDocument *textDocument() const = 0;
     virtual QString text() const = 0;
     virtual QTextCursor textCursor() const = 0;
+    static int getLineInDocument(QTextDocument* document, int offset);
 
     virtual void deactivateChangeSignals() = 0;
     virtual void reactivateChangeSignals() = 0;
diff --git a/src/plugins/qmldesigner/designercore/model/textmodifier.cpp b/src/plugins/qmldesigner/designercore/model/textmodifier.cpp
index 3434b21497f..8b5ea35ff1c 100644
--- a/src/plugins/qmldesigner/designercore/model/textmodifier.cpp
+++ b/src/plugins/qmldesigner/designercore/model/textmodifier.cpp
@@ -26,6 +26,7 @@
 #include "textmodifier.h"
 
 #include <qmljs/qmljsmodelmanagerinterface.h>
+#include <texteditor/convenience.h>
 
 using namespace QmlDesigner;
 
@@ -33,6 +34,14 @@ TextModifier::~TextModifier()
 {
 }
 
+int TextModifier::getLineInDocument(QTextDocument *document, int offset)
+{
+    int line = -1;
+    int column = -1;
+    TextEditor::Convenience::convertPosition(document, offset, &line, &column);
+    return line;
+}
+
 QmlJS::Snapshot TextModifier::qmljsSnapshot()
 {
     QmlJS::ModelManagerInterface *modelManager = QmlJS::ModelManagerInterface::instance();