handle empty tools::Rectangle in editeng

Change-Id: Ie59a7ee3b95eafe2a2f743a76f8feb993c0c3daa
Reviewed-on: https://gerrit.libreoffice.org/72110
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

editeng/source/editeng/impedit.cxx

@@ -647,9 +647,9 @@ void ImpEditView::SetOutputArea( const tools::Rectangle& rRect )
     tools::Rectangle aNewRect(rOutDev.LogicToPixel(rRect));
     aNewRect = rOutDev.PixelToLogic(aNewRect);
     aOutArea = aNewRect;
-    if ( aOutArea.Right() < aOutArea.Left() )
+    if ( !aOutArea.IsWidthEmpty() && aOutArea.Right() < aOutArea.Left() )
         aOutArea.SetRight( aOutArea.Left() );
-    if ( aOutArea.Bottom() < aOutArea.Top() )
+    if ( !aOutArea.IsHeightEmpty() && aOutArea.Bottom() < aOutArea.Top() )
         aOutArea.SetBottom( aOutArea.Top() );
 
     SetScrollDiffX( static_cast<sal_uInt16>(aOutArea.GetWidth()) * 2 / 10 );
@@ -867,6 +867,8 @@ void ImpEditView::CalcAnchorPoint()
 void ImpEditView::ShowCursor( bool bGotoCursor, bool bForceVisCursor )
 {
     // No ShowCursor in an empty View ...
+    if (aOutArea.IsEmpty())
+        return;
     if ( ( aOutArea.Left() >= aOutArea.Right() ) && ( aOutArea.Top() >= aOutArea.Bottom() ) )
         return;
 

editeng/source/editeng/impedit3.cxx

@@ -724,7 +724,7 @@ bool ImpEditEngine::CreateLines( sal_Int32 nPara, sal_uInt32 nStartPosY )
     if ( !nLine )
     {
         aBulletArea = GetEditEnginePtr()->GetBulletArea( GetParaPortions().GetPos( pParaPortion ) );
-        if ( aBulletArea.Right() > 0 )
+        if ( !aBulletArea.IsWidthEmpty() && aBulletArea.Right() > 0 )
             pParaPortion->SetBulletX( static_cast<sal_Int32>(GetXValue( aBulletArea.Right() )) );
         else
             pParaPortion->SetBulletX( 0 ); // if Bullet is set incorrectly
@@ -1676,7 +1676,7 @@ void ImpEditEngine::CreateAndInsertEmptyLine( ParaPortion* pParaPortion )
     else
     {
         aBulletArea = GetEditEnginePtr()->GetBulletArea( GetParaPortions().GetPos( pParaPortion ) );
-        if ( aBulletArea.Right() > 0 )
+        if ( !aBulletArea.IsEmpty() && aBulletArea.Right() > 0 )
             pParaPortion->SetBulletX( static_cast<sal_Int32>(GetXValue( aBulletArea.Right() )) );
         else
             pParaPortion->SetBulletX( 0 ); // If Bullet set incorrectly.