using System;
using System.Diagnostics;
using System.Linq;
using CPF.Drawing;
using CPF.ReoGrid.Core;
using CPF.ReoGrid.Data;
using CPF.ReoGrid.Graphics;
using CPF.ReoGrid.Main;
using CPF.ReoGrid.Outline;
using CPF.ReoGrid.Rendering;

namespace CPF.ReoGrid.Views
{
	internal class NormalViewportController : ViewportController, IFreezableViewportController, IScrollableViewportController, IScalableViewportController
	{
		public NormalViewportController(Worksheet sheet) : base(sheet)
		{
			sheet.ViewportController = this;
			this.AddView(this.rightBottomSpace = new SpaceView());
			this.AddView(this.leadHeadPart = new LeadHeaderView(this));
			this.AddView(this.colHeaderPart2 = new ColumnHeaderView(this));
			this.AddView(this.rowHeaderPart2 = new RowHeaderView(this));
			this.AddView(this.rightBottomViewport = new SheetViewport(this));
			this.rightBottomViewport.ScrollableDirections = ScrollDirection.Both;
			this.FocusView = this.rightBottomViewport;
			this.mainViewport = this.rightBottomViewport;
		}

		public override void SetViewVisible(ViewTypes viewFlag, bool visible)
		{
			base.SetViewVisible(viewFlag, visible);
			bool flag = base.IsViewVisible(ViewTypes.RowHeader);
			bool flag2 = base.IsViewVisible(ViewTypes.ColumnHeader);
			bool flag3 = base.IsViewVisible((ViewTypes)34);
			bool flag4 = base.IsViewVisible((ViewTypes)20);
			bool flag5 = (viewFlag & ViewTypes.ColumnHeader) == ViewTypes.ColumnHeader;
			if (flag5)
			{
				if (visible)
				{
					this.colHeaderPart2.Visible = true;
					this.colHeaderPart2.VisibleRegion = this.rightBottomViewport.VisibleRegion;
					bool flag6 = this.currentFreezePos.Col > 0;
					if (flag6)
					{
						this.colHeaderPart1.Visible = true;
						this.colHeaderPart1.VisibleRegion = this.frozenVisibleRegion;
					}
				}
				else
				{
					this.colHeaderPart2.Visible = false;
					bool flag7 = this.colHeaderPart1 != null;
					if (flag7)
					{
						this.colHeaderPart1.Visible = false;
					}
				}
			}
			bool flag8 = (viewFlag & ViewTypes.RowHeader) == ViewTypes.RowHeader;
			if (flag8)
			{
				if (visible)
				{
					this.rowHeaderPart2.Visible = true;
					this.rowHeaderPart2.VisibleRegion = this.rightBottomViewport.VisibleRegion;
					bool flag9 = this.currentFreezePos.Row > 0;
					if (flag9)
					{
						this.rowHeaderPart1.Visible = true;
						this.rowHeaderPart1.VisibleRegion = this.frozenVisibleRegion;
					}
				}
				else
				{
					this.rowHeaderPart2.Visible = false;
					bool flag10 = this.rowHeaderPart1 != null;
					if (flag10)
					{
						this.rowHeaderPart1.Visible = false;
					}
				}
			}
			this.leadHeadPart.Visible = base.IsViewVisible(ViewTypes.LeadHeader);
			bool flag11 = base.IsViewVisible(ViewTypes.RowOutline);
			bool flag12 = base.IsViewVisible(ViewTypes.ColOutline);
			bool flag13 = flag11;
			if (flag13)
			{
				bool flag14 = visible && this.rowOutlinePart2 == null;
				if (flag14)
				{
					this.rowOutlinePart2 = new RowOutlineView(this);
					this.rowOutlinePart2.ScrollY = this.rowHeaderPart2.ScrollY;
					this.AddView(this.rowOutlinePart2);
				}
				bool flag15 = this.rowOutlinePart2 != null;
				if (flag15)
				{
					this.rowOutlinePart2.Visible = flag11;
				}
				bool flag16 = this.rowOutlinePart1 != null;
				if (flag16)
				{
					this.rowOutlinePart1.Visible = flag11;
				}
			}
			else
			{
				bool flag17 = this.rowOutlinePart2 != null;
				if (flag17)
				{
					this.rowOutlinePart2.Visible = false;
				}
				bool flag18 = this.rowOutlinePart1 != null;
				if (flag18)
				{
					this.rowOutlinePart1.Visible = false;
				}
			}
			bool flag19 = flag3;
			if (flag19)
			{
				bool flag20 = this.rowOutlineHeadPart == null;
				if (flag20)
				{
					this.rowOutlineHeadPart = new RowOutlineHeaderView(this);
					this.AddView(this.rowOutlineHeadPart);
				}
				this.rowOutlineHeadPart.Visible = true;
			}
			else
			{
				bool flag21 = this.rowOutlineHeadPart != null;
				if (flag21)
				{
					this.rowOutlineHeadPart.Visible = false;
				}
			}
			bool flag22 = flag12;
			if (flag22)
			{
				bool flag23 = visible && this.colOutlinePart2 == null;
				if (flag23)
				{
					this.colOutlinePart2 = new ColumnOutlinePart(this);
					this.colOutlinePart2.ScrollX = this.colHeaderPart2.ScrollX;
					this.AddView(this.colOutlinePart2);
				}
				bool flag24 = this.colOutlinePart2 != null;
				if (flag24)
				{
					this.colOutlinePart2.Visible = flag12;
				}
				bool flag25 = this.colOutlinePart1 != null;
				if (flag25)
				{
					this.colOutlinePart1.Visible = flag12;
				}
			}
			else
			{
				bool flag26 = this.colOutlinePart2 != null;
				if (flag26)
				{
					this.colOutlinePart2.Visible = false;
				}
				bool flag27 = this.colOutlinePart1 != null;
				if (flag27)
				{
					this.colOutlinePart1.Visible = false;
				}
			}
			bool flag28 = flag4;
			if (flag28)
			{
				bool flag29 = this.colOutlineHeadPart == null;
				if (flag29)
				{
					this.colOutlineHeadPart = new ColumnOutlineHeadPart(this);
					this.AddView(this.colOutlineHeadPart);
				}
				this.colOutlineHeadPart.Visible = true;
			}
			else
			{
				bool flag30 = this.colOutlineHeadPart != null;
				if (flag30)
				{
					this.colOutlineHeadPart.Visible = false;
				}
			}
			bool flag31 = flag11 && flag12;
			if (flag31)
			{
				bool flag32 = this.outlineLeftTopSpace == null;
				if (flag32)
				{
					this.outlineLeftTopSpace = new OutlineLeftTopSpace(this);
					this.AddView(this.outlineLeftTopSpace);
				}
				this.outlineLeftTopSpace.Visible = visible;
			}
			else
			{
				bool flag33 = this.outlineLeftTopSpace != null;
				if (flag33)
				{
					this.outlineLeftTopSpace.Visible = false;
				}
			}
		}

		private Rect GetGridScaleBounds(CellPosition pos)
		{
			return this.GetGridScaleBounds(pos.Row, pos.Col);
		}

		private Rect GetGridScaleBounds(int row, int col)
		{
			CellPosition freezePos = this.worksheet.FreezePos;
			RowHeader rowHeader = this.worksheet.rows[freezePos.Row];
			ColumnHeader columnHeader = this.worksheet.cols[freezePos.Col];
			float num = (float)columnHeader.Left * this.ScaleFactor;
			float num2 = (float)rowHeader.Top * this.ScaleFactor;
			float num3 = (float)columnHeader.InnerWidth * this.ScaleFactor + 1f;
			float num4 = (float)rowHeader.InnerHeight * this.ScaleFactor + 1f;
			return new Rect(ref num, ref num2, ref num3, ref num4);
		}

		private Rect GetRangeScaledBounds(GridRegion region)
		{
			RowHeader rowHeader = this.worksheet.rows[region.startRow];
			ColumnHeader columnHeader = this.worksheet.cols[region.startCol];
			RowHeader rowHeader2 = this.worksheet.rows[region.endRow];
			ColumnHeader columnHeader2 = this.worksheet.cols[region.endCol];
			float num = (float)columnHeader.Left * this.ScaleFactor;
			float num2 = (float)rowHeader.Top * this.ScaleFactor;
			float num3 = (float)columnHeader2.Right * this.ScaleFactor;
			float num4 = (float)rowHeader2.Bottom * this.ScaleFactor;
			float num5 = num3 - num;
			float num6 = num4 - num2;
			return new Rect(ref num, ref num2, ref num5, ref num6);
		}

		public override IView FocusView
		{
			get
			{
				return base.FocusView;
			}
			set
			{
				base.FocusView = value;
				bool flag = value == null;
				if (flag)
				{
					base.FocusView = this.rightBottomViewport;
				}
			}
		}

		protected virtual void UpdateVisibleRegion()
		{
			this.UpdateViewportVisibleRegion(this.rightBottomViewport, NormalViewportController.GetVisibleRegion(this.rightBottomViewport));
			CellPosition freezePos = this.worksheet.FreezePos;
			bool flag = freezePos.Row > 0 || freezePos.Col > 0;
			if (flag)
			{
				this.UpdateViewportVisibleRegion(this.topLeftViewport, NormalViewportController.GetVisibleRegion(this.topLeftViewport));
				this.UpdateViewportVisibleRegion(this.leftBottomViewport, new GridRegion(this.rightBottomViewport.VisibleRegion.startRow, this.topLeftViewport.VisibleRegion.startCol, this.rightBottomViewport.VisibleRegion.endRow, this.topLeftViewport.VisibleRegion.endCol));
				this.UpdateViewportVisibleRegion(this.rightTopViewport, new GridRegion(this.topLeftViewport.VisibleRegion.startRow, this.rightBottomViewport.VisibleRegion.startCol, this.topLeftViewport.VisibleRegion.endRow, this.rightBottomViewport.VisibleRegion.endCol));
			}
			bool flag2 = this.topLeftViewport != null;
			if (flag2)
			{
				this.colHeaderPart1.VisibleRegion = this.topLeftViewport.VisibleRegion;
				this.rowHeaderPart1.VisibleRegion = this.topLeftViewport.VisibleRegion;
			}
			this.colHeaderPart2.VisibleRegion = this.rightBottomViewport.VisibleRegion;
			this.rowHeaderPart2.VisibleRegion = this.rightBottomViewport.VisibleRegion;
		}

		private void UpdateViewportVisibleRegion(Viewport viewport, GridRegion range)
		{
			GridRegion visibleRegion = viewport.VisibleRegion;
			viewport.VisibleRegion = range;
			this.UpdateNewVisibleRegionTexts(viewport.VisibleRegion, visibleRegion);
		}

		private void UpdateNewVisibleRegionTexts(GridRegion region, GridRegion oldVisibleRegion)
		{
			Stopwatch stopwatch = Stopwatch.StartNew();
			this.worksheet.cells.Iterate(region.startRow, region.startCol, region.Rows, region.Cols, true, delegate(int r, int c, Cell cell)
			{
				RowHeader rowHeader = this.worksheet.rows[r];
				bool flag2 = rowHeader.InnerHeight <= 0;
				int result;
				if (flag2)
				{
					result = region.Cols;
				}
				else
				{
					int colspan = (int)cell.Colspan;
					bool flag3 = colspan <= 0;
					if (flag3)
					{
						result = 1;
					}
					else
					{
						bool flag4 = cell.RenderScaleFactor != this.ScaleFactor && !string.IsNullOrEmpty(cell.DisplayText);
						if (flag4)
						{
							this.worksheet.UpdateCellFont(cell, UpdateFontReason.ScaleChanged);
							cell.RenderScaleFactor = this.ScaleFactor;
						}
						result = ((colspan <= 0) ? 1 : colspan);
					}
				}
				return result;
			});
			stopwatch.Stop();
			long elapsedMilliseconds = stopwatch.ElapsedMilliseconds;
			bool flag = elapsedMilliseconds > 10L;
			if (flag)
			{
				Debug.WriteLine("update new visible region text takes " + elapsedMilliseconds.ToString() + " ms.");
			}
		}

		internal static GridRegion GetVisibleRegion(Viewport viewport)
		{
			Stopwatch stopwatch = Stopwatch.StartNew();
			Worksheet sheet = viewport.Worksheet;
			float renderScaleFactor = sheet.renderScaleFactor;
			GridRegion region = GridRegion.Empty;
			float scaledViewLeft = viewport.ScrollViewLeft;
			float scaledViewTop = viewport.ScrollViewTop;
			float scaledViewRight = viewport.ScrollViewLeft + viewport.Width / renderScaleFactor;
			float scaledViewBottom = viewport.ScrollViewTop + viewport.Height / renderScaleFactor;
			bool flag = viewport.Height > 0f && sheet.rows.Count > 0;
			if (flag)
			{
				float num = (float)sheet.rows.Last<RowHeader>().Bottom;
				bool flag2 = scaledViewTop > num;
				if (flag2)
				{
					region.startRow = sheet.RowCount - 1;
				}
				else
				{
					int split = sheet.rows.Count / 2;
					ArrayHelper.QuickFind(split, 0, sheet.rows.Count, delegate(int rindex)
					{
						RowHeader rowHeader = sheet.rows[rindex];
						float num3 = (float)rowHeader.Top;
						float num4 = (float)rowHeader.Bottom;
						bool flag9 = scaledViewTop >= num3 && scaledViewTop <= num4;
						int result;
						if (flag9)
						{
							region.startRow = rindex;
							result = 0;
						}
						else
						{
							bool flag10 = scaledViewTop < num3;
							if (flag10)
							{
								result = -1;
							}
							else
							{
								bool flag11 = scaledViewTop > num4;
								if (!flag11)
								{
									throw new InvalidOperationException();
								}
								result = 1;
							}
						}
						return result;
					});
				}
				bool flag3 = scaledViewBottom > num;
				if (flag3)
				{
					region.endRow = sheet.rows.Count - 1;
				}
				else
				{
					int split2 = sheet.rows.Count / 2;
					ArrayHelper.QuickFind(split2, 0, sheet.rows.Count, delegate(int rindex)
					{
						RowHeader rowHeader = sheet.rows[rindex];
						float num3 = (float)rowHeader.Top;
						float num4 = (float)rowHeader.Bottom;
						bool flag9 = scaledViewBottom >= num3 && scaledViewBottom <= num4;
						int result;
						if (flag9)
						{
							region.endRow = rindex;
							result = 0;
						}
						else
						{
							bool flag10 = scaledViewBottom < num3;
							if (flag10)
							{
								result = -1;
							}
							else
							{
								bool flag11 = scaledViewBottom > num4;
								if (!flag11)
								{
									throw new InvalidOperationException();
								}
								result = 1;
							}
						}
						return result;
					});
				}
			}
			bool flag4 = viewport.Width > 0f && sheet.cols.Count > 0;
			if (flag4)
			{
				float num2 = (float)sheet.cols.Last<ColumnHeader>().Right;
				bool flag5 = scaledViewLeft > num2;
				if (flag5)
				{
					region.startCol = sheet.cols.Count - 1;
				}
				else
				{
					int split3 = sheet.cols.Count / 2;
					ArrayHelper.QuickFind(split3, 0, sheet.cols.Count, delegate(int cindex)
					{
						ColumnHeader columnHeader = sheet.cols[cindex];
						float num3 = (float)columnHeader.Left;
						float num4 = (float)columnHeader.Right;
						bool flag9 = scaledViewLeft >= num3 && scaledViewLeft <= num4;
						int result;
						if (flag9)
						{
							region.startCol = cindex;
							result = 0;
						}
						else
						{
							bool flag10 = scaledViewLeft < num3;
							if (flag10)
							{
								result = -1;
							}
							else
							{
								bool flag11 = scaledViewLeft > num4;
								if (!flag11)
								{
									throw new InvalidOperationException();
								}
								result = 1;
							}
						}
						return result;
					});
				}
				bool flag6 = scaledViewRight > num2;
				if (flag6)
				{
					region.endCol = sheet.cols.Count - 1;
				}
				else
				{
					int split4 = sheet.cols.Count / 2;
					ArrayHelper.QuickFind(split4, 0, sheet.cols.Count, delegate(int cindex)
					{
						ColumnHeader columnHeader = sheet.cols[cindex];
						float num3 = (float)columnHeader.Left;
						float num4 = (float)columnHeader.Right;
						bool flag9 = scaledViewRight >= num3 && scaledViewRight <= num4;
						int result;
						if (flag9)
						{
							region.endCol = cindex;
							result = 0;
						}
						else
						{
							bool flag10 = scaledViewRight < num3;
							if (flag10)
							{
								result = -1;
							}
							else
							{
								bool flag11 = scaledViewRight > num4;
								if (!flag11)
								{
									throw new InvalidOperationException();
								}
								result = 1;
							}
						}
						return result;
					});
				}
			}
			Debug.Assert(region.endRow >= region.startRow);
			Debug.Assert(region.endCol >= region.startCol);
			stopwatch.Stop();
			bool flag7 = region.Rows > 200 || region.Cols > 200;
			if (flag7)
			{
				Debug.WriteLine(string.Format("unusual visible region detected: [row: {0} - {1}, col: {2} - {3}]: {4} ms.", new object[]
				{
					region.startRow,
					region.endRow,
					region.startCol,
					region.endCol,
					stopwatch.ElapsedMilliseconds
				}));
			}
			bool flag8 = stopwatch.ElapsedMilliseconds > 15L;
			if (flag8)
			{
				Debug.WriteLine("update visible region takes " + stopwatch.ElapsedMilliseconds.ToString() + " ms.");
			}
			return region;
		}

		public override void UpdateController()
		{
			Stopwatch stopwatch = Stopwatch.StartNew();
			bool flag = base.IsViewVisible(ViewTypes.ColOutline);
			bool flag2 = base.IsViewVisible(ViewTypes.RowOutline);
			bool flag3 = base.IsViewVisible(ViewTypes.ColumnHeader);
			bool flag4 = base.IsViewVisible(ViewTypes.RowHeader);
			bool flag5 = base.IsViewVisible(ViewTypes.LeadHeader);
			CellPosition freezePos = this.worksheet.FreezePos;
			bool flag6 = freezePos.Row > 0 || freezePos.Col > 0;
			float num = base.Bounds.X;
			float num2 = base.Bounds.Y;
			float num3 = 0f;
			float num4 = 0f;
			Rect bounds = new Rect(ref num, ref num2, ref num3, ref num4);
			num = 0f;
			num2 = 0f;
			num3 = 0f;
			num4 = 0f;
			Rect bounds2 = new Rect(ref num, ref num2, ref num3, ref num4);
			num = 0f;
			num2 = 0f;
			num3 = 0f;
			num4 = 0f;
			Rect rect = new Rect(ref num, ref num2, ref num3, ref num4);
			float scaleFactor = this.ScaleFactor;
			bool flag7 = flag3;
			if (flag7)
			{
				bounds2.Height = (float)((int)Math.Round((double)((float)this.worksheet.colHeaderHeight * scaleFactor)));
			}
			bool flag8 = flag4;
			if (flag8)
			{
				bounds2.Width = (float)((int)Math.Round((double)((float)this.worksheet.rowHeaderWidth * scaleFactor)));
			}
			float num5 = 16f * Math.Min(scaleFactor, 1f);
			bool flag9 = flag;
			if (flag9)
			{
				OutlineCollection<ReoGridOutline> outlineCollection = this.worksheet.outlines[RowOrColumn.Column];
				bool flag10 = outlineCollection != null;
				if (flag10)
				{
					bounds.Height = (float)((int)Math.Round((double)((float)outlineCollection.Count * num5)));
				}
				else
				{
					flag = false;
				}
			}
			bool flag11 = flag2;
			if (flag11)
			{
				OutlineCollection<ReoGridOutline> outlineCollection2 = this.worksheet.outlines[RowOrColumn.Row];
				bool flag12 = outlineCollection2 != null;
				if (flag12)
				{
					bounds.Width = (float)((int)Math.Round((double)((float)outlineCollection2.Count * num5)));
				}
				else
				{
					flag2 = false;
				}
			}
			bounds2.X = this.view.Left + bounds.Width;
			bounds2.Y = this.view.Top + bounds.Height;
			bool flag13 = flag5;
			if (flag13)
			{
				this.leadHeadPart.Bounds = bounds2;
			}
			float num6 = this.view.Right - bounds2.Right;
			float num7 = this.view.Bottom - bounds2.Bottom;
			bool flag14 = num6 < 0f;
			if (flag14)
			{
				num6 = 0f;
			}
			bool flag15 = num7 < 0f;
			if (flag15)
			{
				num7 = 0f;
			}
			num = bounds2.Right;
			num2 = bounds2.Bottom;
			rect = new Rect(ref num, ref num2, ref num6, ref num7);
			bool flag16 = flag;
			if (flag16)
			{
				bool flag17 = flag4;
				if (flag17)
				{
					View view = this.colOutlineHeadPart;
					num = bounds2.X;
					num2 = bounds.Y;
					num3 = bounds2.Width;
					num4 = bounds.Height;
					view.Bounds = new Rect(ref num, ref num2, ref num3, ref num4);
				}
				View view2 = this.colOutlinePart2;
				num = bounds2.Right;
				num2 = bounds.Y;
				num3 = rect.Width;
				num4 = bounds.Height;
				view2.Bounds = new Rect(ref num, ref num2, ref num3, ref num4);
			}
			bool flag18 = flag2;
			if (flag18)
			{
				bool flag19 = flag3;
				if (flag19)
				{
					View view3 = this.rowOutlineHeadPart;
					num = bounds.X;
					num2 = bounds.Bottom;
					num3 = bounds.Width;
					num4 = bounds2.Height;
					view3.Bounds = new Rect(ref num, ref num2, ref num3, ref num4);
				}
			}
			num = 0f;
			num2 = 0f;
			num3 = 0f;
			num4 = 0f;
			Rect bounds3 = new Rect(ref num, ref num2, ref num3, ref num4);
			bool flag20 = flag6;
			if (flag20)
			{
				num = 0f;
				num2 = 0f;
				Point point = new Point(ref num, ref num2);
				num = 0f;
				num2 = 0f;
				num3 = 0f;
				num4 = 0f;
				Rect bounds4 = new Rect(ref num, ref num2, ref num3, ref num4);
				switch (this.worksheet.FreezeArea)
				{
				default:
				{
					Rect gridScaleBounds = this.GetGridScaleBounds(freezePos);
					num = rect.X + gridScaleBounds.X;
					num2 = rect.Y + gridScaleBounds.Y;
					point = new Point(ref num, ref num2);
					break;
				}
				case FreezeArea.LeftBottom:
				{
					Rect rangeScaledBounds = this.GetRangeScaledBounds(new GridRegion(freezePos.Row, freezePos.Col, this.worksheet.RowCount - 1, this.worksheet.ColumnCount - 1));
					num = rect.X + rangeScaledBounds.X;
					num2 = rect.Bottom - rangeScaledBounds.Height;
					point = new Point(ref num, ref num2);
					break;
				}
				case FreezeArea.RightTop:
				{
					Rect rangeScaledBounds = this.GetRangeScaledBounds(new GridRegion(freezePos.Row, freezePos.Col, this.worksheet.RowCount - 1, this.worksheet.ColumnCount - 1));
					num = rect.Right - rangeScaledBounds.Width;
					num2 = rect.Y + rangeScaledBounds.Y;
					point = new Point(ref num, ref num2);
					break;
				}
				case FreezeArea.RightBottom:
				{
					Rect rangeScaledBounds = this.GetRangeScaledBounds(new GridRegion(freezePos.Row, freezePos.Col, this.worksheet.RowCount - 1, this.worksheet.ColumnCount - 1));
					num = rect.Right - rangeScaledBounds.Width;
					num2 = rect.Bottom - rangeScaledBounds.Height;
					point = new Point(ref num, ref num2);
					break;
				}
				}
				bool flag21 = point.X < rect.X;
				if (flag21)
				{
					point.X = rect.X;
				}
				bool flag22 = point.Y < rect.Y;
				if (flag22)
				{
					point.Y = rect.Y;
				}
				bool flag23 = point.X > rect.Right;
				if (flag23)
				{
					point.X = rect.Right;
				}
				bool flag24 = point.Y > rect.Bottom;
				if (flag24)
				{
					point.Y = rect.Bottom;
				}
				num = rect.X;
				num2 = rect.Y;
				num3 = point.X - rect.X;
				num4 = point.Y - rect.Y;
				bounds4 = new Rect(ref num, ref num2, ref num3, ref num4);
				num = bounds4.Right;
				num2 = bounds4.Bottom;
				num3 = rect.Width - bounds4.Width;
				num4 = rect.Height - bounds4.Height;
				bounds3 = new Rect(ref num, ref num2, ref num3, ref num4);
				this.topLeftViewport.Bounds = bounds4;
				View view4 = this.leftBottomViewport;
				num = bounds4.X;
				num2 = bounds3.Y;
				num3 = bounds4.Width;
				num4 = bounds3.Height;
				view4.Bounds = new Rect(ref num, ref num2, ref num3, ref num4);
				View view5 = this.rightTopViewport;
				num = bounds3.X;
				num2 = bounds4.Y;
				num3 = bounds3.Width;
				num4 = bounds4.Height;
				view5.Bounds = new Rect(ref num, ref num2, ref num3, ref num4);
				View view6 = this.colHeaderPart1;
				num = this.topLeftViewport.Left;
				num2 = this.leadHeadPart.Top;
				num3 = this.topLeftViewport.Width;
				num4 = (float)this.worksheet.colHeaderHeight * scaleFactor;
				view6.Bounds = new Rect(ref num, ref num2, ref num3, ref num4);
				View view7 = this.rowHeaderPart1;
				num = this.leadHeadPart.Left;
				num2 = this.topLeftViewport.Top;
				num3 = (float)this.worksheet.rowHeaderWidth * scaleFactor;
				num4 = this.topLeftViewport.Height;
				view7.Bounds = new Rect(ref num, ref num2, ref num3, ref num4);
				this.CreateOutlineHeaderViewIfNotExist();
				bool flag25 = flag;
				if (flag25)
				{
					View view8 = this.colOutlinePart1;
					num = bounds4.X;
					num2 = bounds.Y;
					num3 = bounds4.Width;
					num4 = bounds.Height;
					view8.Bounds = new Rect(ref num, ref num2, ref num3, ref num4);
				}
				bool flag26 = flag2;
				if (flag26)
				{
					View view9 = this.rowOutlinePart1;
					num = bounds.X;
					num2 = bounds4.Y;
					num3 = bounds.Width;
					num4 = bounds4.Height;
					view9.Bounds = new Rect(ref num, ref num2, ref num3, ref num4);
				}
			}
			else
			{
				bounds3 = rect;
			}
			this.rightBottomViewport.Bounds = bounds3;
			View view10 = this.colHeaderPart2;
			num = bounds3.X;
			num2 = bounds2.Y;
			num3 = bounds3.Width;
			num4 = bounds2.Height;
			view10.Bounds = new Rect(ref num, ref num2, ref num3, ref num4);
			View view11 = this.rowHeaderPart2;
			num = bounds2.X;
			num2 = bounds3.Y;
			num3 = bounds2.Width;
			num4 = bounds3.Height;
			view11.Bounds = new Rect(ref num, ref num2, ref num3, ref num4);
			bool flag27 = flag2;
			if (flag27)
			{
				View view12 = this.rowOutlinePart2;
				num = bounds.X;
				num2 = bounds3.Y;
				num3 = bounds.Width;
				num4 = bounds3.Height;
				view12.Bounds = new Rect(ref num, ref num2, ref num3, ref num4);
			}
			bool flag28 = flag;
			if (flag28)
			{
				View view13 = this.colOutlinePart2;
				num = bounds3.X;
				num2 = bounds.Y;
				num3 = bounds3.Width;
				num4 = bounds.Height;
				view13.Bounds = new Rect(ref num, ref num2, ref num3, ref num4);
			}
			bool flag29 = flag2 && flag;
			if (flag29)
			{
				this.outlineLeftTopSpace.Bounds = bounds;
			}
			IScrollableControlAdapter controlAdapter = this.worksheet.controlAdapter;
			num = (this.scrollHorLarge = this.view.Width);
			controlAdapter.ScrollBarHorizontalLargeChange = num;
			IScrollableControlAdapter controlAdapter2 = this.worksheet.controlAdapter;
			num = (this.scrollVerLarge = this.view.Height);
			controlAdapter2.ScrollBarVerticalLargeChange = num;
			this.UpdateVisibleRegion();
			this.UpdateScrollBarSize();
			IView view14 = this.View;
			bool flag30 = ((view14 != null) ? view14.Children : null) != null;
			if (flag30)
			{
				foreach (IView view15 in this.View.Children)
				{
					view15.ScaleFactor = this.View.ScaleFactor;
				}
			}
			this.view.UpdateView();
			this.worksheet.RequestInvalidate();
			stopwatch.Stop();
			long elapsedMilliseconds = stopwatch.ElapsedMilliseconds;
			bool flag31 = elapsedMilliseconds > 0L;
			if (flag31)
			{
				Debug.WriteLine("update viewport bounds done: " + elapsedMilliseconds.ToString() + " ms.");
			}
		}

		public override void Reset()
		{
			IViewport viewport = this.view as IViewport;
			bool flag = viewport != null;
			if (flag)
			{
				IViewport viewport2 = viewport;
				float num = 0f;
				float num2 = 0f;
				viewport2.ViewStart = new Point(ref num, ref num2);
				viewport.ScrollX = 0f;
				viewport.ScrollY = 0f;
			}
			this.view.UpdateView();
			this.mainVisibleRegion = GridRegion.Empty;
			this.frozenVisibleRegion = GridRegion.Empty;
			IControlAdapter controlAdapter = this.worksheet.controlAdapter;
			controlAdapter.ScrollBarHorizontalMinimum = 0f;
			controlAdapter.ScrollBarVerticalMinimum = 0f;
			controlAdapter.ScrollBarHorizontalValue = 0f;
			controlAdapter.ScrollBarVerticalValue = 0f;
		}

		public void HorizontalScroll(float value)
		{
			this.ScrollViews(ScrollDirection.Horizontal, value, -1f);
		}

		public void VerticalScroll(float value)
		{
			this.ScrollViews(ScrollDirection.Vertical, -1f, value);
		}

		public virtual void ScrollOffsetViews(ScrollDirection dir, float offsetX, float offsetY)
		{
			this.ScrollViews(dir, ((dir & ScrollDirection.Horizontal) == ScrollDirection.Horizontal) ? (this.scrollHorValue + offsetX) : -1f, ((dir & ScrollDirection.Vertical) == ScrollDirection.Vertical) ? (this.scrollVerValue + offsetY) : -1f);
			this.SynchronizeScrollBar();
		}

		public virtual void ScrollViews(ScrollDirection dir, float x, float y)
		{
			bool flag = float.IsNaN(x) || float.IsNaN(y);
			if (!flag)
			{
				bool flag2 = (dir & ScrollDirection.Horizontal) != ScrollDirection.Horizontal;
				if (flag2)
				{
					x = this.scrollHorValue;
				}
				bool flag3 = (dir & ScrollDirection.Vertical) != ScrollDirection.Vertical;
				if (flag3)
				{
					y = this.scrollVerValue;
				}
				bool flag4 = x == this.mainViewport.ScrollX && y == this.mainViewport.ScrollY;
				if (!flag4)
				{
					bool flag5 = x > this.scrollHorMax;
					if (flag5)
					{
						x = this.scrollHorMax;
					}
					else
					{
						bool flag6 = x < 0f;
						if (flag6)
						{
							x = 0f;
						}
					}
					bool flag7 = y > this.scrollVerMax;
					if (flag7)
					{
						y = this.scrollVerMax;
					}
					else
					{
						bool flag8 = y < 0f;
						if (flag8)
						{
							y = 0f;
						}
					}
					bool isEditing = this.worksheet.IsEditing;
					if (isEditing)
					{
						this.worksheet.EndEdit(EndEditReason.NormalFinish);
					}
					foreach (IView view in this.view.Children)
					{
						IViewport viewport = view as IViewport;
						bool flag9 = viewport != null;
						if (flag9)
						{
							viewport.ScrollTo(x, y);
						}
					}
					this.UpdateVisibleRegion();
					this.view.UpdateView();
					this.worksheet.RequestInvalidate();
					this.scrollHorValue = this.mainViewport.ScrollX;
					this.scrollVerValue = this.mainViewport.ScrollY;
					Workbook workbook = this.worksheet.workbook;
					if (workbook != null)
					{
						workbook.RaiseWorksheetScrolledEvent(this.worksheet, x, y);
					}
				}
			}
		}

		public virtual void ScrollToRange(RangePosition range, CellPosition basePos)
		{
			Viewport viewport = this.FocusView as Viewport;
			bool flag = viewport != null;
			if (flag)
			{
				Rect scaledRangeBounds = this.worksheet.GetScaledRangeBounds(range);
				float scaleFactor = this.ScaleFactor;
				double num = (double)(viewport.ScrollViewTop * scaleFactor);
				double num2 = (double)(viewport.ScrollViewTop * scaleFactor + viewport.Height);
				double num3 = (double)(viewport.ScrollViewLeft * scaleFactor);
				double num4 = (double)(viewport.ScrollViewLeft * scaleFactor + viewport.Width);
				double num5 = 0.0;
				double num6 = 0.0;
				bool flag2 = scaledRangeBounds.Height < viewport.Height && (viewport.ScrollableDirections & ScrollDirection.Vertical) == ScrollDirection.Vertical;
				if (flag2)
				{
					bool flag3 = range.Rows < this.worksheet.rows.Count;
					if (flag3)
					{
						bool flag4 = (double)scaledRangeBounds.Y < num;
						if (flag4)
						{
							num6 = ((double)scaledRangeBounds.Y - num) / (double)this.ScaleFactor;
						}
						else
						{
							bool flag5 = (double)scaledRangeBounds.Bottom >= num2;
							if (flag5)
							{
								num6 = ((double)scaledRangeBounds.Bottom - num2) / (double)this.ScaleFactor + 1.0;
							}
						}
					}
				}
				bool flag6 = scaledRangeBounds.Width < viewport.Width && (viewport.ScrollableDirections & ScrollDirection.Horizontal) == ScrollDirection.Horizontal;
				if (flag6)
				{
					bool flag7 = range.Cols < this.worksheet.cols.Count;
					if (flag7)
					{
						bool flag8 = (double)scaledRangeBounds.X < num3;
						if (flag8)
						{
							num5 = ((double)scaledRangeBounds.X - num3) / (double)this.ScaleFactor;
						}
						else
						{
							bool flag9 = (double)scaledRangeBounds.Right >= num4;
							if (flag9)
							{
								num5 = ((double)scaledRangeBounds.Right - num4) / (double)this.ScaleFactor + 1.0;
							}
						}
					}
				}
				bool flag10 = num5 != 0.0 || num6 != 0.0;
				if (flag10)
				{
					this.ScrollOffsetViews(ScrollDirection.Both, (float)Math.Round(num5), (float)Math.Round(num6));
				}
			}
		}

		private void UpdateScrollBarSize()
		{
			float scaleFactor = this.ScaleFactor;
			float num = 0f;
			float num2 = 0f;
			bool flag = this.worksheet.cols.Count > 0;
			if (flag)
			{
				num = (float)this.worksheet.cols[this.worksheet.cols.Count - 1].Right * scaleFactor + this.mainViewport.Left;
				num -= this.scrollHorLarge;
			}
			bool flag2 = this.worksheet.rows.Count > 0;
			if (flag2)
			{
				num2 = (float)this.worksheet.rows[this.worksheet.rows.Count - 1].Bottom * scaleFactor + this.mainViewport.Top;
				num2 -= this.scrollVerLarge;
			}
			int num3 = Math.Max(0, (int)Math.Ceiling((double)num)) + 1;
			int num4 = Math.Max(0, (int)Math.Ceiling((double)num2)) + 1;
			this.scrollHorMax = (float)num3;
			this.scrollVerMax = (float)num4;
			this.SynchronizeScrollBar();
		}

		public void SynchronizeScrollBar()
		{
			bool flag = this.worksheet == null || this.worksheet.controlAdapter == null;
			if (!flag)
			{
				bool flag2 = this.scrollHorValue < this.scrollHorMin;
				if (flag2)
				{
					this.scrollHorValue = this.scrollHorMin;
				}
				else
				{
					bool flag3 = this.scrollHorValue > this.scrollHorMax;
					if (flag3)
					{
						this.scrollHorValue = this.scrollHorMax;
					}
				}
				bool flag4 = this.scrollVerValue < this.scrollVerMin;
				if (flag4)
				{
					this.scrollVerValue = this.scrollVerMin;
				}
				else
				{
					bool flag5 = this.scrollVerValue > this.scrollVerMax;
					if (flag5)
					{
						this.scrollVerValue = this.scrollVerMax;
					}
				}
				this.worksheet.controlAdapter.ScrollBarHorizontalMaximum = this.scrollHorMax;
				this.worksheet.controlAdapter.ScrollBarVerticalMaximum = this.scrollVerMax;
				this.worksheet.controlAdapter.ScrollBarHorizontalMinimum = this.scrollHorMin;
				this.worksheet.controlAdapter.ScrollBarVerticalMinimum = this.scrollVerMin;
				this.worksheet.controlAdapter.ScrollBarHorizontalLargeChange = this.scrollHorLarge;
				this.worksheet.controlAdapter.ScrollBarVerticalLargeChange = this.scrollVerLarge;
				this.worksheet.controlAdapter.ScrollBarHorizontalValue = this.scrollHorValue;
				this.worksheet.controlAdapter.ScrollBarVerticalValue = this.scrollVerValue;
			}
		}

		public void Freeze(CellPosition freezePos, FreezeArea area = FreezeArea.LeftTop)
		{
			Rect cellBounds = this.worksheet.GetCellBounds(freezePos);
			bool flag = freezePos == CellPosition.Zero;
			if (flag)
			{
				this.mainViewport = this.rightBottomViewport;
				Viewport viewport = this.rightBottomViewport;
				float num = 0f;
				float num2 = 0f;
				viewport.ViewStart = new Point(ref num, ref num2);
				this.rowHeaderPart2.ScrollableDirections = ScrollDirection.Vertical;
				this.colHeaderPart2.ScrollableDirections = ScrollDirection.Horizontal;
				bool flag2 = this.topLeftViewport != null;
				if (flag2)
				{
					this.topLeftViewport.Visible = (this.leftBottomViewport.Visible = (this.rightTopViewport.Visible = false));
				}
				bool flag3 = this.rowHeaderPart1 != null;
				if (flag3)
				{
					this.rowHeaderPart1.Visible = false;
				}
				bool flag4 = this.colHeaderPart1 != null;
				if (flag4)
				{
					this.colHeaderPart1.Visible = false;
				}
				bool flag5 = this.rowOutlinePart1 != null;
				if (flag5)
				{
					this.rowOutlinePart1.Visible = false;
				}
				bool flag6 = this.colOutlinePart1 != null;
				if (flag6)
				{
					this.colOutlinePart1.Visible = false;
				}
			}
			else
			{
				bool flag7 = this.rightTopViewport == null;
				if (flag7)
				{
					this.AddView(this.rightTopViewport = new SheetViewport(this));
				}
				bool flag8 = this.leftBottomViewport == null;
				if (flag8)
				{
					this.AddView(this.leftBottomViewport = new SheetViewport(this));
				}
				bool flag9 = this.colHeaderPart1 == null;
				if (flag9)
				{
					this.AddView(this.colHeaderPart1 = new ColumnHeaderView(this));
				}
				bool flag10 = this.rowHeaderPart1 == null;
				if (flag10)
				{
					this.AddView(this.rowHeaderPart1 = new RowHeaderView(this));
				}
				this.CreateOutlineHeaderViewIfNotExist();
				bool flag11 = this.topLeftViewport == null;
				if (flag11)
				{
					this.AddView(this.topLeftViewport = new SheetViewport(this));
				}
				Viewport viewport2 = this.topLeftViewport;
				float num = 0f;
				float num2 = 0f;
				viewport2.ViewStart = new Point(ref num, ref num2);
				Viewport viewport3 = this.leftBottomViewport;
				num = 0f;
				num2 = cellBounds.Y;
				viewport3.ViewStart = new Point(ref num, ref num2);
				Viewport viewport4 = this.rightTopViewport;
				num = cellBounds.X;
				num2 = 0f;
				viewport4.ViewStart = new Point(ref num, ref num2);
				Viewport viewport5 = this.rightBottomViewport;
				num = cellBounds.X;
				num2 = cellBounds.Y;
				viewport5.ViewStart = new Point(ref num, ref num2);
				switch (this.worksheet.FreezeArea)
				{
				default:
					this.topLeftViewport.ScrollableDirections = ScrollDirection.None;
					this.leftBottomViewport.ScrollableDirections = ScrollDirection.Vertical;
					this.rightTopViewport.ScrollableDirections = ScrollDirection.Horizontal;
					this.colHeaderPart1.ScrollableDirections = ScrollDirection.None;
					this.rowHeaderPart1.ScrollableDirections = ScrollDirection.None;
					this.colHeaderPart2.ScrollableDirections = ScrollDirection.Horizontal;
					this.rowHeaderPart2.ScrollableDirections = ScrollDirection.Vertical;
					this.mainViewport = this.rightBottomViewport;
					break;
				case FreezeArea.LeftBottom:
					this.topLeftViewport.ScrollableDirections = ScrollDirection.Vertical;
					this.leftBottomViewport.ScrollableDirections = ScrollDirection.None;
					this.rightBottomViewport.ScrollableDirections = ScrollDirection.Horizontal;
					this.colHeaderPart1.ScrollableDirections = ScrollDirection.None;
					this.rowHeaderPart1.ScrollableDirections = ScrollDirection.Vertical;
					this.colHeaderPart2.ScrollableDirections = ScrollDirection.Horizontal;
					this.rowHeaderPart2.ScrollableDirections = ScrollDirection.None;
					this.mainViewport = this.rightTopViewport;
					break;
				case FreezeArea.RightTop:
					this.topLeftViewport.ScrollableDirections = ScrollDirection.Horizontal;
					this.rightTopViewport.ScrollableDirections = ScrollDirection.None;
					this.rightBottomViewport.ScrollableDirections = ScrollDirection.Vertical;
					this.colHeaderPart1.ScrollableDirections = ScrollDirection.Horizontal;
					this.rowHeaderPart1.ScrollableDirections = ScrollDirection.None;
					this.colHeaderPart2.ScrollableDirections = ScrollDirection.None;
					this.rowHeaderPart2.ScrollableDirections = ScrollDirection.Vertical;
					this.mainViewport = this.leftBottomViewport;
					break;
				case FreezeArea.RightBottom:
					this.leftBottomViewport.ScrollableDirections = ScrollDirection.Horizontal;
					this.rightTopViewport.ScrollableDirections = ScrollDirection.Vertical;
					this.rightBottomViewport.ScrollableDirections = ScrollDirection.None;
					this.colHeaderPart1.ScrollableDirections = ScrollDirection.Horizontal;
					this.rowHeaderPart1.ScrollableDirections = ScrollDirection.Vertical;
					this.colHeaderPart2.ScrollableDirections = ScrollDirection.None;
					this.rowHeaderPart2.ScrollableDirections = ScrollDirection.None;
					this.mainViewport = this.topLeftViewport;
					break;
				}
				this.topLeftViewport.Visible = (this.leftBottomViewport.Visible = (this.rightTopViewport.Visible = true));
				this.colHeaderPart1.Visible = this.colHeaderPart2.Visible;
				this.rowHeaderPart1.Visible = this.rowHeaderPart2.Visible;
				bool flag12 = this.colOutlinePart1 != null && this.colOutlinePart2 != null;
				if (flag12)
				{
					this.colOutlinePart1.Visible = this.colOutlinePart2.Visible;
				}
				bool flag13 = this.rowOutlinePart1 != null && this.rowOutlinePart2 != null;
				if (flag13)
				{
					this.rowOutlinePart1.Visible = this.rowOutlinePart2.Visible;
				}
			}
			this.mainViewport.ScrollableDirections = ScrollDirection.Both;
			bool flag14 = this.rowHeaderPart1 != null;
			if (flag14)
			{
				this.rowHeaderPart1.ViewTop = this.topLeftViewport.ViewTop;
			}
			bool flag15 = this.colHeaderPart1 != null;
			if (flag15)
			{
				this.colHeaderPart1.ViewLeft = this.topLeftViewport.ViewLeft;
			}
			this.colHeaderPart2.ViewLeft = this.rightBottomViewport.ViewLeft;
			this.rowHeaderPart2.ViewTop = this.rightBottomViewport.ViewTop;
			bool flag16 = this.colOutlinePart2 != null;
			if (flag16)
			{
				this.colOutlinePart2.ViewLeft = this.rightBottomViewport.ViewLeft;
				this.colOutlinePart2.ScrollableDirections = this.colHeaderPart2.ScrollableDirections;
				bool flag17 = this.colOutlinePart1 != null;
				if (flag17)
				{
					this.colOutlinePart1.ViewStart = this.colHeaderPart1.ViewStart;
					this.colOutlinePart1.ScrollableDirections = this.colHeaderPart1.ScrollableDirections;
				}
			}
			bool flag18 = this.rowOutlinePart2 != null;
			if (flag18)
			{
				this.rowOutlinePart2.ViewTop = this.rightBottomViewport.ViewTop;
				this.rowOutlinePart2.ScrollableDirections = this.rowHeaderPart2.ScrollableDirections;
				bool flag19 = this.rowOutlinePart1 != null;
				if (flag19)
				{
					this.rowOutlinePart1.ViewStart = this.rowHeaderPart1.ViewStart;
					this.rowOutlinePart1.ScrollableDirections = this.rowHeaderPart1.ScrollableDirections;
				}
			}
			this.worksheet.controlAdapter.ScrollBarHorizontalMinimum = 0f;
			this.worksheet.controlAdapter.ScrollBarVerticalMinimum = 0f;
			this.worksheet.controlAdapter.ScrollBarHorizontalLargeChange = (float)Math.Round((double)this.mainViewport.Width);
			this.worksheet.controlAdapter.ScrollBarVerticalLargeChange = (float)Math.Round((double)this.mainViewport.Height);
			this.currentFreezePos = freezePos;
			this.currentFrozenArea = area;
			this.UpdateController();
		}

		private void CreateOutlineHeaderViewIfNotExist()
		{
			bool flag = this.rowOutlinePart1 == null && this.rowOutlinePart2 != null;
			if (flag)
			{
				this.AddView(this.rowOutlinePart1 = new RowOutlineView(this));
				this.RemoveView(this.rowOutlineHeadPart);
				this.AddView(this.rowOutlineHeadPart);
			}
			bool flag2 = this.colOutlinePart1 == null && this.colOutlinePart2 != null;
			if (flag2)
			{
				this.AddView(this.colOutlinePart1 = new ColumnOutlinePart(this));
				this.RemoveView(this.colOutlineHeadPart);
				this.AddView(this.colOutlineHeadPart);
				bool flag3 = this.outlineLeftTopSpace != null;
				if (flag3)
				{
					this.RemoveView(this.outlineLeftTopSpace);
					this.AddView(this.outlineLeftTopSpace);
				}
			}
		}

		public override void Draw(CellDrawingContext dc)
		{
			base.Draw(dc);
			IGraphics graphics = dc.Graphics;
			bool flag = this.view != null && this.worksheet.HasSettings(WorksheetSettings.View_ShowFrozenLine);
			if (flag)
			{
				CellPosition freezePos = this.worksheet.FreezePos;
				bool flag2 = freezePos.Col > 0;
				if (flag2)
				{
					graphics.DrawLine(this.leftBottomViewport.Right, this.view.Top, this.leftBottomViewport.Right, this.view.Bottom, Color.Gray);
				}
				bool flag3 = freezePos.Row > 0;
				if (flag3)
				{
					graphics.DrawLine(this.view.Left, this.rightTopViewport.Bottom, this.view.Right, this.rightTopViewport.Bottom, Color.Gray);
				}
			}
		}

		private LeadHeaderView leadHeadPart;

		private RowHeaderView rowHeaderPart1 = null;

		private RowHeaderView rowHeaderPart2 = null;

		private ColumnHeaderView colHeaderPart2 = null;

		private ColumnHeaderView colHeaderPart1 = null;

		private SheetViewport topLeftViewport = null;

		private SheetViewport leftBottomViewport = null;

		private SheetViewport rightBottomViewport = null;

		private SheetViewport rightTopViewport = null;

		internal SheetViewport mainViewport = null;

		private SpaceView rightBottomSpace;

		private GridRegion frozenVisibleRegion = GridRegion.Empty;

		private GridRegion mainVisibleRegion = GridRegion.Empty;

		private float scrollHorMin = 0f;

		private float scrollHorMax;

		private float scrollHorLarge;

		private float scrollHorValue;

		private float scrollVerMin = 0f;

		private float scrollVerMax;

		private float scrollVerLarge;

		private float scrollVerValue;

		private CellPosition currentFreezePos = new CellPosition(0, 0);

		private FreezeArea currentFrozenArea = FreezeArea.None;

		private RowOutlineView rowOutlinePart2;

		private RowOutlineView rowOutlinePart1;

		private RowOutlineHeaderView rowOutlineHeadPart;

		private ColumnOutlinePart colOutlinePart2;

		private ColumnOutlinePart colOutlinePart1;

		private ColumnOutlineHeadPart colOutlineHeadPart;

		private OutlineLeftTopSpace outlineLeftTopSpace;
	}
}