//
// System.Drawing.FontConverter.cs
//
// Authors:
//	Dennis Hayes (dennish@Raytek.com)
//	Gonzalo Paniagua Javier (gonzalo@ximian.com)
//	Ravindra (rkumar@novell.com)
//
// Copyright (C) 2002,2003 Ximian, Inc.  http://www.ximian.com
//
// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System;
using System.Text;
using System.Collections;
using System.ComponentModel;
using System.Globalization;
using System.Drawing.Text;
using System.ComponentModel.Design.Serialization;
using System.Reflection;

namespace System.Drawing
{
	public class FontConverter : TypeConverter
	{
		public FontConverter ()
		{
		}

		public override bool CanConvertFrom (ITypeDescriptorContext context, Type sourceType)
		{
			if (sourceType == typeof (string))
				return true;

			return base.CanConvertFrom (context, sourceType);
		}

		public override bool CanConvertTo (ITypeDescriptorContext context, Type destinationType)
		{
			if (destinationType == typeof (String))
				return true;

			if (destinationType == typeof (InstanceDescriptor))
				return true;

			return base.CanConvertTo (context, destinationType);
		}

		public override object ConvertTo (ITypeDescriptorContext context,
			CultureInfo culture,
			object value,
			Type destinationType)
		{
			if ((destinationType == typeof (string)) && (value is Font)) {
				Font font = (Font) value;
				StringBuilder sb = new StringBuilder ();
				sb.Append (font.Name).Append (", ");
				sb.Append (font.Size);

				switch (font.Unit) {
					// MS throws ArgumentException, if unit is set 
					// to GraphicsUnit.Display
					// Don't know what to append for GraphicsUnit.Display
				case GraphicsUnit.Display:
					sb.Append ("display"); break;

				case GraphicsUnit.Document:
					sb.Append ("doc"); break;

				case GraphicsUnit.Point:
					sb.Append ("pt"); break;

				case GraphicsUnit.Inch:
					sb.Append ("in"); break;

				case GraphicsUnit.Millimeter:
					sb.Append ("mm"); break;

				case GraphicsUnit.Pixel:
					sb.Append ("px"); break;

				case GraphicsUnit.World:
					sb.Append ("world"); break;
				}

				if (font.Style != FontStyle.Regular)
					sb.Append (", style=").Append (font.Style);

				return sb.ToString ();
			}

			if ((destinationType == typeof (InstanceDescriptor)) && (value is Font)) {
				Font font = (Font) value;
				ConstructorInfo met = typeof(Font).GetConstructor (new Type[] {typeof(string), typeof(float), typeof(FontStyle), typeof(GraphicsUnit)});
				object[] args = new object[4];
				args [0] = font.Name;
				args [1] = font.Size;
				args [2] = font.Style;
				args [3] = font.Unit;
				return new InstanceDescriptor (met, args);
			}
			
			return base.ConvertTo (context, culture, value, destinationType);
		}

		public override object ConvertFrom (ITypeDescriptorContext context,
			CultureInfo culture,
			object value)
		{
			string fontFamily = value as string;
			if (fontFamily == null)
				return base.ConvertFrom (context, culture, value);

			// MS creates a font from the given family with
			// emSize = 8.
			return new Font (fontFamily, 8);
		}

		public override object CreateInstance (ITypeDescriptorContext context,
			IDictionary propertyValues)
		{
			Object value;
			byte charSet = 1;
			float size = 8;
			String name = null;
			bool vertical = false;
			FontStyle style = FontStyle.Regular;
			FontFamily fontFamily = null;
			GraphicsUnit unit = GraphicsUnit.Point;

			if ((value = propertyValues ["GdiCharSet"]) != null)
				charSet = (byte) value;

			if ((value = propertyValues ["Size"]) != null)
				size = (float) value;

			if ((value = propertyValues ["Unit"]) != null)
				unit = (GraphicsUnit) value;

			if ((value = propertyValues ["Name"]) != null)
				name = (String) value;

			if ((value = propertyValues ["GdiVerticalFont"]) != null)
				vertical = (bool) value;

			if ((value = propertyValues ["Bold"]) != null) {
				bool bold = (bool) value;
				if (bold == true)
					style |= FontStyle.Bold;
			}

			if ((value = propertyValues ["Italic"]) != null) {
				bool italic = (bool) value;
				if (italic == true)
					style |= FontStyle.Italic;
			}

			if ((value = propertyValues ["Strikeout"]) != null) {
				bool strike = (bool) value;
				if (strike == true)
					style |= FontStyle.Strikeout;
			}

			if ((value = propertyValues ["Underline"]) != null) {
				bool underline = (bool) value;
				if (underline == true)
					style |= FontStyle.Underline;
			}

			/* ?? Should default font be culture dependent ?? */
			if (name == null)
				fontFamily = new FontFamily ("Tahoma");
			else {
				name = name.ToLower ();
				FontCollection collection = new InstalledFontCollection ();
				FontFamily [] installedFontList = collection.Families;
				foreach (FontFamily font in installedFontList) {
					if (name == font.Name.ToLower ()) {
						fontFamily = font;
						break;
					}
				}

				// font family not found in installed fonts
				if (fontFamily == null) {
					collection = new PrivateFontCollection ();
					FontFamily [] privateFontList = collection.Families;
					foreach (FontFamily font in privateFontList) {
						if (name == font.Name.ToLower ()) {
							fontFamily = font;
							break;
						}
					}
				}

				// font family not found in private fonts also
				if (fontFamily == null)
					fontFamily = FontFamily.GenericSansSerif;
			}

			return new Font (fontFamily, size, style, unit, charSet, vertical);
		}

		public override bool GetCreateInstanceSupported (ITypeDescriptorContext context)
		{
			return true;
		}

		public override PropertyDescriptorCollection GetProperties
			(ITypeDescriptorContext context,
			object value, Attribute [] attributes)
		{
			if (value is Font)
				return TypeDescriptor.GetProperties (value, attributes);

			return base.GetProperties (context, value, attributes);
		}

		public override bool GetPropertiesSupported (ITypeDescriptorContext context)
		{
			return true;
		}

		public sealed class FontNameConverter : TypeConverter
		{
			public FontNameConverter ()
			{
			}

			public override bool CanConvertFrom (ITypeDescriptorContext context, Type sourceType)
			{
				if (sourceType == typeof (string))
					return true;

				return base.CanConvertFrom (context, sourceType);
			}

			[MonoTODO]
			public override object ConvertFrom (ITypeDescriptorContext context,
				CultureInfo culture,
				object value)
			{
				throw new NotImplementedException ();
			}

			[MonoTODO]
			public override StandardValuesCollection GetStandardValues (ITypeDescriptorContext context)
			{
				throw new NotImplementedException ();
			}

			[MonoTODO]
			public override bool GetStandardValuesExclusive (ITypeDescriptorContext context)
			{
				throw new NotImplementedException ();
			}

			public override bool GetStandardValuesSupported (ITypeDescriptorContext context)
			{
				return true;
			}
		}

		public class FontUnitConverter : EnumConverter
		{
			public FontUnitConverter () : base (typeof (GraphicsUnit))
			{
			}

			[MonoTODO]
			public override TypeConverter.StandardValuesCollection GetStandardValues (ITypeDescriptorContext context)
			{
				throw new NotImplementedException ();
			}
		}
	}
}