tdf#142852 forward surrounding-text requests to an active drawing editengine

when present.

As we do for related CommandEventId::[StartExtTextInput/EndExtTextInput]

Change-Id: Ie5b57c8a8a1a258efc2be079a2674b1ca620dc9d
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/117465
Reviewed-by: Justin Luth <justin_luth@sil.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Justin Luth <justin_luth@sil.org>
Tested-by: Jenkins
diff --git a/sw/source/uibase/docvw/edtwin.cxx b/sw/source/uibase/docvw/edtwin.cxx
index d93c1f0..22c1c3f 100644
--- a/sw/source/uibase/docvw/edtwin.cxx
+++ b/sw/source/uibase/docvw/edtwin.cxx
@@ -6397,8 +6397,12 @@ void SwEditWin::SetUseInputLanguage( bool bNew )

OUString SwEditWin::GetSurroundingText() const
{
    OUString sReturn;
    SwWrtShell& rSh = m_rView.GetWrtShell();

    if (rSh.HasDrawView() && rSh.GetDrawView()->IsTextEdit())
        return rSh.GetDrawView()->GetTextEditOutlinerView()->GetSurroundingText();

    OUString sReturn;
    if( rSh.HasSelection() && !rSh.IsMultiSelection() && rSh.IsSelOnePara() )
        rSh.GetSelectedText( sReturn, ParaBreakType::ToOnlyCR  );
    else if( !rSh.HasSelection() )
@@ -6430,6 +6434,10 @@ OUString SwEditWin::GetSurroundingText() const
Selection SwEditWin::GetSurroundingTextSelection() const
{
    SwWrtShell& rSh = m_rView.GetWrtShell();

    if (rSh.HasDrawView() && rSh.GetDrawView()->IsTextEdit())
        return rSh.GetDrawView()->GetTextEditOutlinerView()->GetSurroundingTextSelection();

    if( rSh.HasSelection() )
    {
        OUString sReturn;
@@ -6465,6 +6473,9 @@ bool SwEditWin::DeleteSurroundingText(const Selection& rSelection)
{
    SwWrtShell& rSh = m_rView.GetWrtShell();

    if (rSh.HasDrawView() && rSh.GetDrawView()->IsTextEdit())
        return rSh.GetDrawView()->GetTextEditOutlinerView()->DeleteSurroundingText(rSelection);

    if (rSh.HasSelection())
        return false;