using System;
using System.Drawing;
using System.Drawing.Printing;
using System.Reflection;
using System.Runtime.InteropServices;

namespace Wankuma.Interop
{
	/// <summary>
	/// PrinterInfo の概要の説明です。
	/// </summary>
	public class GetDeviceCapsWrapper : IDisposable
	{

		#region P/Invoke
		[DllImport("gdi32.dll")]
		private static extern int GetDeviceCaps(IntPtr hdc, int nIndex);

		[DllImport("gdi32.dll")]
		private static extern IntPtr CreateDC(string lpszDriver, string lpszDevice, string lpszOutput, IntPtr lpInitData);

		[DllImport("gdi32.dll")]
		private static extern bool DeleteDC(IntPtr hdc);

		
		#endregion
		#region メンバ
		/// <summary>
		/// プリンタハンドル
		/// </summary>
		private IntPtr _PrinterHandle;

		/// <summary>
		/// プリンタ名
		/// </summary>
		private string _PrinterName = null;
		#endregion
		#region public enum CommandIndex
		/// <summary>
		/// データ取得用コマンド番号
		/// </summary>
		public enum CommandIndex
		{
			/// <summary>
			/// Device driver version
			/// </summary>
			DRIVERVERSION = 0,     // Device driver version
			/// <summary>
			/// Device classification
			/// </summary>
			TECHNOLOGY    = 2,     // Device classification
			/// <summary>
			/// Horizontal size in millimeters
			/// </summary>
			HORZSIZE      = 4,     // Horizontal size in millimeters
			/// <summary>
			/// Vertical size in millimeters
			/// </summary>
			VERTSIZE      = 6,     // Vertical size in millimeters
			/// <summary>
			/// Horizontal width in pixels
			/// </summary>
			HORZRES       = 8,     // Horizontal width in pixels
			/// <summary>
			/// Vertical height in pixels
			/// </summary>
			VERTRES       = 10,    // Vertical height in pixels
			/// <summary>
			/// Number of bits per pixel
			/// </summary>
			BITSPIXEL     = 12,    // Number of bits per pixel
			/// <summary>
			/// Number of planes
			/// </summary>
			PLANES        = 14,    // Number of planes
			/// <summary>
			/// Number of brushes the device has
			/// </summary>
			NUMBRUSHES    = 16,    // Number of brushes the device has
			/// <summary>
			/// Number of pens the device has
			/// </summary>
			NUMPENS       = 18,    // Number of pens the device has
			/// <summary>
			/// Number of markers the device has
			/// </summary>
			NUMMARKERS    = 20,    // Number of markers the device has
			/// <summary>
			/// Number of fonts the device has
			/// </summary>
			NUMFONTS      = 22,    // Number of fonts the device has
			/// <summary>
			/// Number of colors the device supports
			/// </summary>
			NUMCOLORS     = 24,    // Number of colors the device supports
			/// <summary>
			/// Size required for device descriptor
			/// </summary>
			PDEVICESIZE   = 26,    // Size required for device descriptor
			/// <summary>
			/// Curve capabilities
			/// </summary>
			CURVECAPS     = 28,    // Curve capabilities
			/// <summary>
			/// Line capabilities
			/// </summary>
			LINECAPS      = 30,    // Line capabilities
			/// <summary>
			/// Polygonal capabilities
			/// </summary>
			POLYGONALCAPS = 32,    // Polygonal capabilities
			/// <summary>
			/// Text capabilities
			/// </summary>
			TEXTCAPS      = 34,    // Text capabilities
			/// <summary>
			/// Clipping capabilities
			/// </summary>
			CLIPCAPS      = 36,    // Clipping capabilities
			/// <summary>
			/// Bitblt capabilities
			/// </summary>
			RASTERCAPS    = 38,    // Bitblt capabilities
			/// <summary>
			/// Length of the X leg
			/// </summary>
			ASPECTX       = 40,    // Length of the X leg
			/// <summary>
			/// Length of the Y leg
			/// </summary>
			ASPECTY       = 42,    // Length of the Y leg
			/// <summary>
			/// Length of the hypotenuse
			/// </summary>
			ASPECTXY      = 44,    // Length of the hypotenuse
			/// <summary>
			/// Logical pixels/inch in X
			/// </summary>
			LOGPIXELSX    = 88,    // Logical pixels/inch in X
			/// <summary>
			/// Logical pixels/inch in Y
			/// </summary>
			LOGPIXELSY    = 90,    // Logical pixels/inch in Y
			/// <summary>
			/// Number of entries in physical palette
			/// </summary>
			SIZEPALETTE  = 104,    // Number of entries in physical palette
			/// <summary>
			/// Number of reserved entries in palette
			/// </summary>
			NUMRESERVED  = 106,    // Number of reserved entries in palette
			/// <summary>
			/// Actual color resolution
			/// </summary>
			COLORRES     = 108,    // Actual color resolution
			// Printing related DeviceCaps. These replace the appropriate Escapes
			/// <summary>
			/// Physical Width in device units
			/// </summary>
			PHYSICALWIDTH   = 110, // Physical Width in device units
			/// <summary>
			/// Physical Height in device units
			/// </summary>
			PHYSICALHEIGHT  = 111, // Physical Height in device units
			/// <summary>
			/// Physical Printable Area x margin
			/// </summary>
			PHYSICALOFFSETX = 112, // Physical Printable Area x margin
			/// <summary>
			/// Physical Printable Area y margin
			/// </summary>
			PHYSICALOFFSETY = 113, // Physical Printable Area y margin
			/// <summary>
			/// Scaling factor x
			/// </summary>
			SCALINGFACTORX  = 114, // Scaling factor x
			/// <summary>
			/// Scaling factor y
			/// </summary>
			SCALINGFACTORY  = 115, // Scaling factor y

			// Display driver specific

			/// <summary>
			/// Current vertical refresh rate of the display device (for displays only) in Hz
			/// </summary>
			VREFRESH        = 116,  // Current vertical refresh rate of the display device (for displays only) in Hz
			/// <summary>
			/// Horizontal width of entire desktop in pixels
			/// </summary>
			DESKTOPVERTRES  = 117,  // Horizontal width of entire desktop in pixels
			/// <summary>
			/// Vertical height of entire desktop in pixels
			/// </summary>
			DESKTOPHORZRES  = 118,  // Vertical height of entire desktop in pixels
			/// <summary>
			/// Preferred blt alignment
			/// </summary>
			BLTALIGNMENT    = 119,  // Preferred blt alignment

			/// <summary>
			/// Shading and blending caps
			/// </summary>
			SHADEBLENDCAPS  = 120,  // Shading and blending caps
			/// <summary>
			/// Color Management caps
			/// </summary>
			COLORMGMTCAPS   = 121,  // Color Management caps
		}

		#endregion
		#region public GetDeviceCapsWrapper()
		/// <summary>
		/// コンストラクタ
		/// </summary>
		public GetDeviceCapsWrapper()
		{
		}
		#endregion
		#region public bool Init(string PrinterName)
		/// <summary>
		/// 初期化処理
		/// </summary>
		/// <param name="PrinterName">情報を取得するプリンタ名を設定</param>
		/// <returns>true = 取得成功, false = 取得失敗</returns>
		public bool Init(string PrinterName)
		{
			if ( PrinterName == null || PrinterName == "" )
			{
				throw new ArgumentNullException("PrinterName");
			}

			this._PrinterName = PrinterName;
			return this.InitPrinter();
		}
		#endregion
		#region public bool Init(PrinterSettings ps)
		/// <summary>
		/// 初期化処理
		/// </summary>
		/// <param name="ps">情報を取得するプリンタ設定</param>
		/// <returns>true = 取得成功, false = 取得失敗</returns>
		public bool Init(PrinterSettings ps)
		{
			if ( ps == null )
			{
				throw new ArgumentNullException("ps");
			}

			this._PrinterName = ps.PrinterName;
			return this.InitPrinter();
		}
		#endregion
		#region private bool InitPrinter()
		/// <summary>
		/// プリンタハンドルを取得する
		/// </summary>
		/// <returns>true=成功, false=失敗</returns>
		private bool InitPrinter()
		{
			IntPtr PrinterHandle;
			PrinterHandle = CreateDC(@"WINSPOOL", this._PrinterName, null, IntPtr.Zero );
			if ( PrinterHandle == IntPtr.Zero )
			{
				//失敗
				return false;
			}
			else
			{
				this._PrinterHandle = PrinterHandle;
				return true;
			}
		}
		#endregion
		#region public int GetData(CommandIndex ci)
		/// <summary>
		/// データ取得
		/// </summary>
		/// <param name="ci">コマンド番号</param>
		/// <returns>取得した値</returns>
		public int GetData(CommandIndex ci)
		{
			if ( this._PrinterHandle == IntPtr.Zero )
			{
				throw new Exception("手続きミス");
			}
			return GetDeviceCaps(this._PrinterHandle, (int)ci);
		}
		#endregion
		#region IDisposable メンバ

		/// <summary>
		/// Dispose処理
		/// プリンタを開放します。
		/// </summary>
		public void Dispose()
		{
			// TODO:  PrinterInfo.Dispose 実装を追加します。
			if ( this._PrinterHandle != IntPtr.Zero )
			{
				DeleteDC(this._PrinterHandle);
			}
		}

		#endregion
	}//class
}//namespace