Abstract out repeated code into lambdas

...to silence a clang-analyzer-deadcode.DeadStores on the last update of nLeft
and nRight, each.  Also, adding a gap of 3 to nRight in case no further buttons
will be layed out next to maDockRect resp. maHideRect is irrelevant, as nRight
will not be used for any further layout computations in those cases.

Change-Id: I251d4470099b1f98782ebdfd0c776d881bb7fae5

vcl/source/window/brdwin.cxx

@@ -1431,74 +1431,60 @@ void ImplStdBorderWindowView::Init( OutputDevice* pDev, long nWidth, long nHeigh
 
         if ( pData->mnTitleType & (BORDERWINDOW_TITLE_NORMAL | BORDERWINDOW_TITLE_SMALL) )
         {
-            long nLeft          = pData->maTitleRect.Left();
-            long nRight         = pData->maTitleRect.Right();
-            long nItemTop       = pData->maTitleRect.Top();
-            long nItemBottom    = pData->maTitleRect.Bottom();
-            nLeft              += 1;
-            nRight             -= 3;
-            nItemTop           += 2;
-            nItemBottom        -= 2;
+            long nLeft          = pData->maTitleRect.Left() + 1;
+            long nRight         = pData->maTitleRect.Right() - 3;
+            long const nItemTop = pData->maTitleRect.Top() + 2;
+            long const nItemBottom = pData->maTitleRect.Bottom() - 2;
+
+            auto addOnLeft = [&nLeft, nItemTop, nItemBottom](
+                Rectangle & rect, long width, long gap)
+            {
+                rect.Top() = nItemTop;
+                rect.Bottom() = nItemBottom;
+                rect.Left() = nLeft;
+                rect.Right() = rect.Left() + width;
+                nLeft += rect.GetWidth() + gap;
+            };
+            auto addSquareOnRight = [&nRight, nItemTop, nItemBottom](
+                Rectangle & rect, long gap)
+            {
+                rect.Top() = nItemTop;
+                rect.Bottom() = nItemBottom;
+                rect.Right() = nRight;
+                rect.Left() = rect.Right() - rect.GetHeight() + 1;
+                nRight -= rect.GetWidth() + gap;
+            };
 
             if ( pBorderWindow->GetStyle() & WB_PINABLE )
             {
                 Image aImage;
                 ImplGetPinImage( DrawButtonFlags::NONE, false, aImage );
-                pData->maPinRect.Top()    = nItemTop;
-                pData->maPinRect.Bottom() = nItemBottom;
-                pData->maPinRect.Left()   = nLeft;
-                pData->maPinRect.Right()  = pData->maPinRect.Left()+aImage.GetSizePixel().Width();
-                nLeft += pData->maPinRect.GetWidth()+3;
+                addOnLeft(pData->maPinRect, aImage.GetSizePixel().Width(), 3);
             }
 
             if ( pBorderWindow->GetStyle() & WB_CLOSEABLE )
             {
-                pData->maCloseRect.Top()    = nItemTop;
-                pData->maCloseRect.Bottom() = nItemBottom;
-                pData->maCloseRect.Right()  = nRight;
-                pData->maCloseRect.Left()   = pData->maCloseRect.Right()-pData->maCloseRect.GetHeight()+1;
-                nRight -= pData->maCloseRect.GetWidth()+3;
+                addSquareOnRight(pData->maCloseRect, 3);
             }
 
             if ( pBorderWindow->mbMenuBtn )
             {
-                pData->maMenuRect.Top()    = nItemTop;
-                pData->maMenuRect.Bottom() = nItemBottom;
-                pData->maMenuRect.Right()  = nRight;
-                pData->maMenuRect.Left()   = pData->maMenuRect.Right()-pData->maMenuRect.GetHeight()+1;
-                nRight -= pData->maMenuRect.GetWidth();
+                addSquareOnRight(pData->maMenuRect, 0);
             }
 
             if ( pBorderWindow->mbDockBtn )
             {
-                pData->maDockRect.Top()    = nItemTop;
-                pData->maDockRect.Bottom() = nItemBottom;
-                pData->maDockRect.Right()  = nRight;
-                pData->maDockRect.Left()   = pData->maDockRect.Right()-pData->maDockRect.GetHeight()+1;
-                nRight -= pData->maDockRect.GetWidth();
-                if ( !pBorderWindow->mbHideBtn &&
-                     !(pBorderWindow->GetStyle() & WB_ROLLABLE) )
-                    nRight -= 3;
+                addSquareOnRight(pData->maDockRect, 0);
             }
 
             if ( pBorderWindow->mbHideBtn )
             {
-                pData->maHideRect.Top()    = nItemTop;
-                pData->maHideRect.Bottom() = nItemBottom;
-                pData->maHideRect.Right()  = nRight;
-                pData->maHideRect.Left()   = pData->maHideRect.Right()-pData->maHideRect.GetHeight()+1;
-                nRight -= pData->maHideRect.GetWidth();
-                if ( !(pBorderWindow->GetStyle() & WB_ROLLABLE) )
-                    nRight -= 3;
+                addSquareOnRight(pData->maHideRect, 0);
             }
 
             if ( pBorderWindow->GetStyle() & WB_ROLLABLE )
             {
-                pData->maRollRect.Top()    = nItemTop;
-                pData->maRollRect.Bottom() = nItemBottom;
-                pData->maRollRect.Right()  = nRight;
-                pData->maRollRect.Left()   = pData->maRollRect.Right()-pData->maRollRect.GetHeight()+1;
-                nRight -= pData->maRollRect.GetWidth();
+                addSquareOnRight(pData->maRollRect, 0);
             }
         }
         else