//
// System.Drawing.FontFamily.cs
//
// (C) 2005 Mainsoft Corporation (http://www.mainsoft.com)
// Author: Konstantin Triger (kostat@mainsoft.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.Drawing.Text;
using System.Text;
using System.Runtime.InteropServices;
using System.Globalization;
using awt = java.awt;
using geom = java.awt.geom;
using font = java.awt.font;
using TextAttribute = java.awt.font.TextAttribute;

namespace System.Drawing {

	public sealed class FontFamily : MarshalByRefObject, IDisposable {
		
		static readonly FontFamily _genericMonospace;
		static readonly FontFamily _genericSansSerif;
		static readonly FontFamily _genericSerif;
		static readonly FontCollection _installedFonts;
		internal static readonly awt.Container Container;

		static FontFamily() {
			Container = new awt.Container();
			_installedFonts = new InstalledFontCollection();
			_genericMonospace = new FontFamily(GenericFontFamilies.Monospace);
			_genericSansSerif = new FontFamily(GenericFontFamilies.SansSerif);
			_genericSerif = new FontFamily(GenericFontFamilies.Serif);
		}
		
		private readonly string _name;

		private awt.FontMetrics _fontMetrics = null;
		private FontStyle _lastStyle = FontStyle.Regular;
		private readonly awt.Font _font;

		// this is unavailable through Java API, usually 2048 for TT fonts
		const int UnitsPerEm = 2048;
		// the margin for text drawing
		const int DrawMargin = 571;

		#region ctors
		
		// dummy ctors to work around convertor problems
		internal FontFamily() {}
		internal FontFamily(IntPtr family) {}

		static string ToGenericFontName(GenericFontFamilies genericFamily) {
			switch(genericFamily) {
				case GenericFontFamilies.SansSerif:
					return "SansSerif";
				case GenericFontFamilies.Serif:
					return "Serif";
				default:
					return "Monospaced";
			}
		}
		
		public FontFamily(string familyName) : this(familyName, null) {
		}

		public FontFamily(string name, FontCollection fontCollection) {
			if (name == null)
				throw new ArgumentNullException("name");

			if (fontCollection == null)
				fontCollection = _installedFonts;

			if (fontCollection.Contains(name))
				_name = name;
			else {
				_name = ToGenericFontName(GenericFontFamilies.SansSerif);
				fontCollection = _installedFonts;
			}

			_font = fontCollection.GetInitialFont( _name );
		}

		public FontFamily(GenericFontFamilies genericFamily) : this(ToGenericFontName(genericFamily)) {
		}
		
		#endregion

		public string Name {
			get {
				return _name;
			}
		}

		internal int GetDrawMargin(FontStyle style) {
			return DrawMargin;
		}

		awt.FontMetrics GetMetrics(FontStyle style) {
			if ((_lastStyle != style) || (_fontMetrics == null)) {	
				java.util.Map attrib = Font.DeriveStyle( FamilyFont.getAttributes(), style, true);
				attrib.put(TextAttribute.SIZE, new java.lang.Float((float)(UnitsPerEm<<1)));
				_fontMetrics = Container.getFontMetrics( FamilyFont.deriveFont( attrib ) );
			}
			return _fontMetrics;
		}

		public int GetCellAscent(FontStyle style) {
			return GetMetrics(style).getMaxAscent()>>1;
		}

		public int GetCellDescent(FontStyle style) {
			return GetMetrics(style).getMaxDecent()>>1;
		}

		public int GetEmHeight(FontStyle style) {
			return UnitsPerEm;
		}

		public int GetLineSpacing(FontStyle style) {
			return GetMetrics(style).getHeight()>>1;
		}

		public string GetName(int language) {
			try {
				CultureInfo culture = new CultureInfo(language, false);
				java.util.Locale locale = vmw.@internal.EnvironmentUtils.getLocaleFromCultureInfo( culture );

				return FamilyFont.getFamily( locale );
			}
			catch {
				return Name;
			}
		}

		public bool IsStyleAvailable(FontStyle style) {
			//unable to get this infromation from java
			return true;
		}

		#region static members

		public static FontFamily[] Families {
			get {
				return _installedFonts.Families;
			}
		}
		
		public static FontFamily GenericMonospace {
			get {
				return (FontFamily)_genericMonospace.MemberwiseClone();
			}
		}
		
		public static FontFamily GenericSansSerif {
			get {
				return (FontFamily)_genericSansSerif.MemberwiseClone();
			}
		}
		
		public static FontFamily GenericSerif {
			get {
				return (FontFamily)_genericSerif.MemberwiseClone();
			}
		}		

		public static FontFamily[] GetFamilies(Graphics graphics) {
			if (graphics == null) {
				throw new ArgumentNullException("graphics");
			}
			return _installedFonts.Families;
		}

		#endregion

		#region Object members

		public override bool Equals(object obj) {
			if (this == obj)
				return true;

			if (!(obj is FontFamily))
				return false;

			return string.Compare(Name, ((FontFamily)obj).Name, true) == 0;
		}

		public override int GetHashCode() {
			return Name.ToLower().GetHashCode();
		}

		public override string ToString() {
			return string.Format("[{0}: Name={1}]", GetType().Name, Name);
		}

		#endregion

		#region IDisposable Members

		public void Dispose() {
		}

		#endregion

		internal awt.Font FamilyFont {
			get {
				return _font;
			}
		}
	}
}