C:/work/OMMR/OCHHP_OMMR_OMMR/Code/Assemblies/SharpSSH/Source/SharpSSH-1.1.1.13.src/SharpSSH/jsch/examples/util/ConsoleProgressBar.cs

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/*
 * Based on: http://www.dotnet247.com/247reference/msgs/45/225703.aspx
 * 20/9/2005
 * */
using System;
using System.Text;
using System.Threading;
using System.Runtime.InteropServices;

namespace Tamir.SharpSsh.jsch.examples
{
        public class ConsoleProgressBar
        {
                private const int STD_OUTPUT_HANDLE = -11;
                private int mHConsoleHandle;
                COORD barCoord;

                [StructLayout(LayoutKind.Sequential)]
                        public struct COORD
                {
                        public short X;
                        public short Y;
                        public COORD(short x, short y)
                        {
                                X = x;
                                Y = y;
                        }
                }

                [StructLayout(LayoutKind.Sequential)]
                        struct SMALL_RECT
                {
                        public short Left;
                        public short Top;
                        public short Right;
                        public short Bottom;
                }

                [StructLayout(LayoutKind.Sequential)]
                        struct CONSOLE_SCREEN_BUFFER_INFO
                {
                        public COORD dwSize;
                        public COORD dwCursorPosition;
                        public int wAttributes;
                        public SMALL_RECT srWindow;
                        public COORD dwMaximumWindowSize;
                }

                [DllImport("kernel32.dll", EntryPoint="GetStdHandle", SetLastError=true, CharSet=CharSet.Auto, CallingConvention=CallingConvention.StdCall)]
                private static extern int GetStdHandle(int nStdHandle);

                [DllImport("kernel32.dll", EntryPoint="GetConsoleScreenBufferInfo", SetLastError=true, CharSet=CharSet.Auto, CallingConvention=CallingConvention.StdCall)]
                private static extern int GetConsoleScreenBufferInfo(int hConsoleOutput, out CONSOLE_SCREEN_BUFFER_INFO lpConsoleScreenBufferInfo);

                [DllImport("kernel32.dll", EntryPoint="SetConsoleCursorPosition", SetLastError=true, CharSet=CharSet.Auto, CallingConvention=CallingConvention.StdCall)]
                private static extern int SetConsoleCursorPosition(int hConsoleOutput, COORD dwCursorPosition);

                public ConsoleProgressBar()
                {
                        //
                        // TODO: Add constructor logic here.
                        //
                        mHConsoleHandle = GetStdHandle(STD_OUTPUT_HANDLE);
                        
                        barCoord = this.GetCursorPos();
                        Console.WriteLine();
                        Console.WriteLine();
                        Console.WriteLine();
                }

                public void SetCursorPos(short x, short y)
                {
                        SetConsoleCursorPosition(mHConsoleHandle, new COORD(x, y));
                }

                public COORD GetCursorPos()
                {
                        CONSOLE_SCREEN_BUFFER_INFO res;
                        GetConsoleScreenBufferInfo(mHConsoleHandle, out res);
                        return res.dwCursorPosition;
                }
                
                StringBuilder progressBar = new StringBuilder();
                public void Update(int transferredBytes, int totalBytes, string message)
                {
                        COORD cur = this.GetCursorPos();
                        this.SetCursorPos(barCoord.X, barCoord.Y);
                        
                        int progress;
                        if(totalBytes!=0)
                                progress = (int)(transferredBytes*100.0/totalBytes);
                        else
                                progress = 0;

                        progressBar.Length=0;
                        progressBar.Append( progress );
                        progressBar.Append( "% [" );

                        for(double i=0; i<50; i++)
                        {
                                if (i*2<progress) progressBar.Append( "#" );
                                else progressBar.Append( "-" );
                        }

                        progressBar.Append( "] ");
                        
                        if(totalBytes!=0)
                        {
                                int transferredKB = (int)(transferredBytes/1000.0);
                                int totalKB = (int)(totalBytes/1000.0);
                                progressBar.Append( (comma(transferredKB)+"K/"+comma(totalKB)+"K\n") );
                        }
                        else
                        {
                                progressBar.Append( "0.0K\n" );
                        }
                        progressBar.Append( message );
                        progressBar.Append( "                        \n");

                        Console.Write(progressBar);
                        this.SetCursorPos(cur.X, cur.Y);
                }

                private string comma(int n)
                {
                        string s = n.ToString();
                        for(int i=s.Length-3; i>0; i=i-3)
                        {
                                s = s.Insert(i, ",");
                        }
                        return s;
                }
        }
}

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