editeng tiled rendering: implement drag of the middle selection handle

With this, it's possible to drag the middle selection handle of editeng
text (e.g. Writer shape text) and the cursor position will be updated
accordingly.

Change-Id: I2b03c8543efca477f2e377f3bb93732cd1775f81

editeng/source/editeng/editview.cxx

@@ -1320,4 +1320,9 @@ Selection EditView::GetSurroundingTextSelection() const
     }
 }
 
+void EditView::SetCursorLogicPosition(const Point& rPosition, bool /*bPoint*/, bool /*bClearMark*/)
+{
+    pImpEditView->SetCursorAtPoint(rPosition);
+}
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

include/editeng/editview.hxx

@@ -250,6 +250,8 @@ public:
                             com::sun::star::uno::Reference< com::sun::star::linguistic2::XSpellChecker1 > xSpell,
                             com::sun::star::uno::Reference< com::sun::star::linguistic2::XLanguageGuessing > xLangGuess,
                             bool bIsParaText );
+    /// Allows adjusting the point or mark of the selection to a document coordinate.
+    void SetCursorLogicPosition(const Point& rPosition, bool bPoint, bool bClearMark);
 };
 
 #endif // INCLUDED_EDITENG_EDITVIEW_HXX

sw/source/uibase/docvw/edtwin.cxx

@@ -54,6 +54,7 @@
 #include <svx/svdhdl.hxx>
 #include <svx/svdoutl.hxx>
 #include <editeng/editeng.hxx>
+#include <editeng/editview.hxx>
 #include <editeng/svxacorr.hxx>
 #include <editeng/scripttypeitem.hxx>
 #include <editeng/flditem.hxx>
@@ -6268,6 +6269,17 @@ void SwEditWin::LogicMouseButtonUp(const MouseEvent& rMouseEvent)
 
 void SwEditWin::SetCursorLogicPosition(const Point& rPosition, bool bPoint, bool bClearMark)
 {
+    if (SdrView* pSdrView = m_rView.GetWrtShell().GetDrawView())
+    {
+        // Editing shape text, then route the call to editeng.
+        if (pSdrView->GetTextEditObject())
+        {
+            EditView& rEditView = pSdrView->GetTextEditOutlinerView()->GetEditView();
+            rEditView.SetCursorLogicPosition(rPosition, bPoint, bClearMark);
+            return;
+        }
+    }
+
     // Not an SwWrtShell, as that would make SwCrsrShell::GetCrsr() inaccessible.
     SwEditShell& rShell = m_rView.GetWrtShell();
     SwMvContext aMvContext(&rShell);