ARCed.UI.VS2005DockPaneStrip.CalculateTabs_Document C# (CSharp) Method

        private void CalculateTabs_Document()
        {
            if (this.m_startDisplayingTab >= Tabs.Count)
                this.m_startDisplayingTab = 0;

            Rectangle rectTabStrip = this.TabsRectangle;

            int x = rectTabStrip.X + rectTabStrip.Height / 2;
            bool overflow = false;

            // Originally all new documents that were considered overflow
            // (not enough pane strip space to show all tabs) were added to
            // the far left (assuming not right to left) and the tabs on the
            // right were dropped from view. If StartDisplayingTab is not 0
            // then we are dealing with making sure a specific tab is kept in focus.
            if (this.m_startDisplayingTab > 0)
            {
                int tempX = x;
                var tab = Tabs[this.m_startDisplayingTab] as TabVS2005;
                tab.MaxWidth = this.GetMaxTabWidth(this.m_startDisplayingTab);

                // Add the active tab and tabs to the left
                for (int i = this.StartDisplayingTab; i >= 0; i--)
                    this.CalculateDocumentTab(rectTabStrip, ref tempX, i);

                // Store which tab is the first one displayed so that it
                // will be drawn correctly (without part of the tab cut off)
                this.FirstDisplayingTab = this.EndDisplayingTab;

                tempX = x; // Reset X location because we are starting over

                // Start with the first tab displayed - name is a little misleading.
                // Loop through each tab and set its location. If there is not enough
                // room for all of them overflow will be returned.
                for (int i = this.EndDisplayingTab; i < Tabs.Count; i++)
                    overflow = this.CalculateDocumentTab(rectTabStrip, ref tempX, i);

                // If not all tabs are shown then we have an overflow.
                if (this.FirstDisplayingTab != 0)
                    overflow = true;
            }
            else
            {
                for (int i = this.StartDisplayingTab; i < Tabs.Count; i++)
                    overflow = this.CalculateDocumentTab(rectTabStrip, ref x, i);
                for (int i = 0; i < this.StartDisplayingTab; i++)
                    overflow = this.CalculateDocumentTab(rectTabStrip, ref x, i);

                this.FirstDisplayingTab = this.StartDisplayingTab;
            }

            if (!overflow)
            {
                this.m_startDisplayingTab = 0;
                this.FirstDisplayingTab = 0;
                x = rectTabStrip.X + rectTabStrip.Height / 2;
                foreach (TabVS2005 tab in Tabs)
                {
                    tab.TabX = x;
                    x += tab.TabWidth;
                }
            }
            this.DocumentTabsOverflow = overflow;
        }