tdf#121606: displaying Mail Merge toolbar shouldn't activate connection

At least I think so. Thus now the code that queries the state of the
toolbar controls only queries dataset if connection is active.

Operating the navigation buttons (next/prev) will, naturally, activate
connection if not yet active. This should also enable the other controls
that may be initially disabled: create/save/print/email documents. Thus,
the navigation controls also check if they have activated the connection,
and invalidate said document creation controls state. Possibly there's a
better place for the invalidation of the controls, but I was unable to
find one.

Regression after commit 5c2c5ff01c23e4f7a8947746afc13a46cbef5bec

Change-Id: I76f895c871718c9c761339ba03963baf6837b592
Reviewed-on: https://gerrit.libreoffice.org/64738
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
diff --git a/sw/source/uibase/app/apphdl.cxx b/sw/source/uibase/app/apphdl.cxx
index b041a53..7ee90e3 100644
--- a/sw/source/uibase/app/apphdl.cxx
+++ b/sw/source/uibase/app/apphdl.cxx
@@ -156,7 +156,8 @@ void SwModule::StateOther(SfxItemSet &rSet)
                    xConfigItem = pView->GetMailMergeConfigItem();
                if (!xConfigItem)
                    rSet.DisableItem(nWhich);
                else
                else if (xConfigItem->GetConnection().is()
                         && !xConfigItem->GetConnection()->isClosed())
                {
                    bool bFirst, bLast;
                    bool bValid = xConfigItem->IsResultSetFirstLast(bFirst, bLast);
@@ -209,6 +210,8 @@ void SwModule::StateOther(SfxItemSet &rSet)
                // #i51949# hide e-Mail option if e-Mail is not supported
                // #i63267# printing might be disabled
                if (!xConfigItem ||
                    !xConfigItem->GetConnection().is() ||
                    xConfigItem->GetConnection()->isClosed() ||
                    !xConfigItem->GetResultSet().is() ||
                    xConfigItem->GetCurrentDBData().sDataSource.isEmpty() ||
                    xConfigItem->GetCurrentDBData().sCommand.isEmpty() ||
@@ -729,6 +732,9 @@ void SwModule::ExecOther(SfxRequest& rReq)
            if (!xConfigItem)
                return;

            const bool bHadConnection
                = xConfigItem->GetConnection().is() && !xConfigItem->GetConnection()->isClosed();

            sal_Int32 nPos = xConfigItem->GetResultSetPosition();
            switch (nWhich)
            {
@@ -766,6 +772,15 @@ void SwModule::ExecOther(SfxRequest& rReq)
            rBindings.Invalidate(FN_MAILMERGE_LAST_ENTRY);
            rBindings.Invalidate(FN_MAILMERGE_CURRENT_ENTRY);
            rBindings.Invalidate(FN_MAILMERGE_EXCLUDE_ENTRY);
            if (!bHadConnection && xConfigItem->GetConnection().is()
                && !xConfigItem->GetConnection()->isClosed())
            {
                // The connection has been activated. Update controls that were disabled
                rBindings.Invalidate(FN_MAILMERGE_CREATE_DOCUMENTS);
                rBindings.Invalidate(FN_MAILMERGE_SAVE_DOCUMENTS);
                rBindings.Invalidate(FN_MAILMERGE_PRINT_DOCUMENTS);
                rBindings.Invalidate(FN_MAILMERGE_EMAIL_DOCUMENTS);
            }
            rBindings.Update();
        }
        break;