VSEDebug - VS.NET Debugging Enhancement

using System;
using SynapticEffect.Forms;
using System.Runtime.InteropServices;

namespace vsedebug
{
	public class VSEUtil
	{
		
		
		[DllImport("user32.dll", CharSet=CharSet.Auto)]
		public static extern int SendMessage(
			IntPtr hWnd,
			System.UInt32 Msg,
			System.Int32 wParam,
			System.Int32 lParam);

		public enum DelayMode
		{
			none = 0,
			manualupdate = 1,
			delay = 2
		}

		public static EnvDTE._DTE ApplicationObject;
		public static EnvDTE.Debugger VSDebugger;
		public static int ElementsPerDivision = 10;
		public static int UpdateDelay = 275;
		public static DelayMode delaymode = DelayMode.manualupdate;
		public static int AutosLinesBefore = 1;
		public static int AutosLinesAfter = 0;
		public static System.Drawing.Font DisplayFont;

		/*
		 * Searches for a command in the commands collection that matches the key press event args that were
		 */

		/*
		 * Reads the settings file and sets the statics
		 */
		public static void ReadSettingsFile(string filepath)
		{
			String line;
			string[] halves;
			System.IO.StreamReader filereader = new System.IO.StreamReader(filepath);

			string familyname;
			float size;
			System.Drawing.FontStyle style;

			line = filereader.ReadLine();
			halves = line.Split(new char[]{'='}, 2);
			ElementsPerDivision = System.Convert.ToInt32(halves[1]);
			line = filereader.ReadLine();
			halves = line.Split(new char[]{'='}, 2);
			delaymode = (DelayMode)System.Convert.ToInt32(halves[1]);
			line = filereader.ReadLine();
			halves = line.Split(new char[]{'='}, 2);
			UpdateDelay = System.Convert.ToInt32(halves[1]);
			line = filereader.ReadLine();
			halves = line.Split(new char[]{'='}, 2);
			AutosLinesBefore = System.Convert.ToInt32(halves[1]);
			line = filereader.ReadLine();
			halves = line.Split(new char[]{'='}, 2);
			AutosLinesAfter = System.Convert.ToInt32(halves[1]);
			line = filereader.ReadLine();
			halves = line.Split(new char[]{'='}, 2);
			familyname = halves[1];
			line = filereader.ReadLine();
			halves = line.Split(new char[]{'='}, 2);
			size = (float)System.Convert.ToDouble(halves[1]);
			line = filereader.ReadLine();
			halves = line.Split(new char[]{'='}, 2);
			style = (System.Drawing.FontStyle)System.Convert.ToInt32(halves[1]);

			DisplayFont = new System.Drawing.Font(familyname, size, style);
		}
		/*
		 * Writes the settings file
		 */
		public static void WriteSettingsFile(string filepath)
		{
			System.IO.StreamWriter filewriter = new System.IO.StreamWriter(filepath, false);
			filewriter.WriteLine("ItemsPerDivision=" + ElementsPerDivision.ToString());
			filewriter.WriteLine("DelayMode=" + ((int)delaymode).ToString());
			filewriter.WriteLine("UpdateDelay=" + UpdateDelay.ToString());
			filewriter.WriteLine("AutosLinesBefore=" + AutosLinesBefore.ToString());
			filewriter.WriteLine("AutosLinesAfter=" + AutosLinesAfter.ToString());
			filewriter.WriteLine("FontFamily=" + DisplayFont.FontFamily.Name);
			filewriter.WriteLine("FontSize=" + DisplayFont.Size.ToString());
			filewriter.WriteLine("FontStyle=" + ((int)DisplayFont.Style).ToString());
			filewriter.Close();
		}
		/*
		 *	Rounds an integer up to the nearest multiple of nearestmult
		 */
		public static int RoundUp(int val, int nearestmult)
		{
			int mult = (val/nearestmult) + 1;
			return mult * nearestmult;
		}
		/*
		 *	Rounds an integer down to the nearest multiple of nearestmult
		 */
		public static int RoundDown(int val, int nearestmult)
		{
			int mult = (val/nearestmult);
			return mult * nearestmult;
		}

		/*
		 *	Generates a path to a variable.  For convenience
		 */
		public static String GenerateVariablePath(TreeListNode currentnode)
		{
			String path = currentnode.ExpressionText;
			//first, make sure we're not dealing with an array, which should not have .
			if(currentnode.Type.IndexOf("[") != -1)
			{
				return path;
			}
			//check to see what we need to put on the end...a . or a ->
			if(currentnode.Type.EndsWith("*") || currentnode.Name == "this")
			{
				path += "->";
			}
			else
			{
				path += ".";
			}
			return path;
		}
		/*
		 *	Deteremines whether the two expressions are equal up to a given depth
		 */
		public static bool ExpressionsAreEqual(EnvDTE.Expressions a, EnvDTE.Expressions b, int levels)
		{
			if(levels == 0) 
			{
				return true;
			}
			if(a == null || b == null)
			{
				return false;
			}
			//we're just checking the indicated number of levels of the expressions tree, to see whether the top level expressions are equal
			if(a.Count != b.Count)
			{
				return false;
			}

			for(int i = 1; i <= a.Count; i++) 
			{
				if(!ExpressionsAreEqual(a.Item(i), b.Item(i), levels))
				{
					return false;
				}
			}
			return true;
		}

		public static bool ExpressionsAreEqual(EnvDTE.Expression a, EnvDTE.Expression b, int levels)
		{
			if(levels == 0)
			{
				return true;
			}

			if(a == null || b == null)
			{
				return false;
			}
			if(a.Name != b.Name || a.Type != b.Type || a.Value != b.Value)
			{
				return false;
			}

			//we're just checking the indicated number of levels of the expressions tree, to see whether the top level expressions are equal
			if(a.DataMembers.Count != b.DataMembers.Count)
			{
				return false;
			}

			for(int i = 1; i <= a.DataMembers.Count; i++) 
			{
				//recurse
				if(!VSEUtil.ExpressionsAreEqual(a.DataMembers.Item(i).DataMembers, b.DataMembers.Item(i).DataMembers, levels-1))
				{
					return false;
				}
			}
			return true;
		}

	}
}