Dynamo.Controls.DynamoView.SlideWindowToIncludeTab C# (CSharp) Method

        private void SlideWindowToIncludeTab(int tabSelected)
        {
            int newSlidingWindowSize = GetSlidingWindowSize();

            if (newSlidingWindowSize == 0)
            {
                tabSlidingWindowStart = tabSlidingWindowEnd = 0;
                return;
            }

            if (tabSelected != 0)
            {
                // Selection is not home tab
                if (tabSelected < tabSlidingWindowStart)
                {
                    // Slide window towards the front
                    tabSlidingWindowStart = tabSelected;
                    tabSlidingWindowEnd = tabSlidingWindowStart + (newSlidingWindowSize - 1);
                }
                else if (tabSelected > tabSlidingWindowEnd)
                {
                    // Slide window towards the end
                    tabSlidingWindowEnd = tabSelected;
                    tabSlidingWindowStart = tabSlidingWindowEnd - (newSlidingWindowSize - 1);
                }
                else
                {
                    int currentSlidingWindowSize = tabSlidingWindowEnd - tabSlidingWindowStart + 1;
                    int windowDiff = Math.Abs(currentSlidingWindowSize - newSlidingWindowSize);

                    // Handles sliding window size change caused by window resizing
                    if (currentSlidingWindowSize > newSlidingWindowSize)
                    {
                        // Trim window
                        while (windowDiff > 0)
                        {
                            if (tabSelected == tabSlidingWindowEnd)
                                tabSlidingWindowStart++; // Trim from front
                            else
                                tabSlidingWindowEnd--; // Trim from end

                            windowDiff--;
                        }
                    }
                    else if (currentSlidingWindowSize < newSlidingWindowSize)
                    {
                        // Expand window
                        int lastTab = WorkspaceTabs.Items.Count - 1;

                        while (windowDiff > 0)
                        {
                            if (tabSlidingWindowEnd == lastTab)
                                tabSlidingWindowStart--;
                            else
                                tabSlidingWindowEnd++;

                            windowDiff--;
                        }
                    }
                    else
                    {
                        // Handle tab closing

                    }
                }
            }
            else
            {
                // Selection is home tab
                int currentSlidingWindowSize = tabSlidingWindowEnd - tabSlidingWindowStart + 1;
                int windowDiff = Math.Abs(currentSlidingWindowSize - newSlidingWindowSize);

                int lastTab = WorkspaceTabs.Items.Count - 1;

                // Handles sliding window size change caused by window resizing and tab close
                if (currentSlidingWindowSize > newSlidingWindowSize)
                {
                    // Trim window
                    while (windowDiff > 0)
                    {
                        tabSlidingWindowEnd--; // Trim from end

                        windowDiff--;
                    }
                }
                else if (currentSlidingWindowSize < newSlidingWindowSize)
                {
                    // Expand window due to window resize
                    while (windowDiff > 0)
                    {
                        if (tabSlidingWindowEnd == lastTab)
                            tabSlidingWindowStart--;
                        else
                            tabSlidingWindowEnd++;

                        windowDiff--;
                    }
                }
                else
                {
                    // Handle tab closing with no change in window size
                    // Shift window
                    if (tabSlidingWindowEnd > lastTab)
                    {
                        tabSlidingWindowStart--;
                        tabSlidingWindowEnd--;
                    }
                    // Handle case that selected tab is still 0 and 
                    // a new tab is created. 
                    else if (tabSlidingWindowEnd < lastTab)
                    {
                        tabSlidingWindowEnd++;
                    }
                }
            }
        }