// GtkSharp.Generation.SymbolTable.cs - The Symbol Table Class.
//
// Author: Mike Kestner <mkestner@speakeasy.net>
//
// (c) 2001 Mike Kestner

namespace GtkSharp.Generation {

	using System;
	using System.Collections;

	public class SymbolTable {
		
		private Hashtable complex_types = new Hashtable ();
		private Hashtable simple_types;
		private Hashtable dlls;
		
		public SymbolTable ()
		{
			simple_types = new Hashtable ();
			simple_types.Add ("void", "void");
			simple_types.Add ("gboolean", "bool");
			simple_types.Add ("gint", "int");
			simple_types.Add ("guint", "uint");
			simple_types.Add ("glong", "long");
			simple_types.Add ("gshort", "short");
			simple_types.Add ("guint32", "uint");
			simple_types.Add ("const-gchar", "String");
			simple_types.Add ("gchar", "String");
			simple_types.Add ("GObject", "GLib.Object");
			simple_types.Add ("gfloat", "float");
			simple_types.Add ("gdouble", "double");
			simple_types.Add ("gint8", "byte");
			simple_types.Add ("guint8", "byte");
			simple_types.Add ("gint16", "short");
			simple_types.Add ("gint32", "int");
			simple_types.Add ("guint16", "ushort");
			simple_types.Add ("guint1", "bool");
			simple_types.Add ("gpointer", "IntPtr");
			simple_types.Add ("guchar", "byte");
			simple_types.Add ("GValue", "GLib.Value");
			simple_types.Add ("GtkType", "int");
			simple_types.Add ("long", "long");
			simple_types.Add ("gulong", "ulong");
			simple_types.Add ("GQuark", "int");
			simple_types.Add ("int", "int");
			simple_types.Add ("char", "char");
			simple_types.Add ("double", "double");
			simple_types.Add ("float", "float");
			simple_types.Add ("gunichar", "String");
			simple_types.Add ("uint1", "bool");
			simple_types.Add ("GPtrArray", "IntPtr[]");
			simple_types.Add ("GType", "int");
			
			// FIXME: These ought to be handled properly.
			simple_types.Add ("GList", "IntPtr");
			simple_types.Add ("GMemChunk", "IntPtr");
			simple_types.Add ("GTimeVal", "IntPtr");
			simple_types.Add ("GClosure", "IntPtr");
			simple_types.Add ("GArray", "IntPtr");
			simple_types.Add ("GData", "IntPtr");
			simple_types.Add ("GTypeModule", "GLib.Object");
			simple_types.Add ("GSList", "GLib.SList");
			simple_types.Add ("GHashTable", "IntPtr");
			simple_types.Add ("va_list", "IntPtr");
			simple_types.Add ("GParamSpec", "IntPtr");
			
			dlls = new Hashtable();
			dlls.Add("Pango", "pango");
			dlls.Add("Atk", "atk");
			dlls.Add("Gdk", "gdk-x11-1.3");
			dlls.Add("Gtk", "gtk-x11-1.3");
		}
		
		public void AddType (IGeneratable gen)
		{
			complex_types [gen.CName] = gen;
		}
		
		public int Count {
			get
			{
				return complex_types.Count;
			}
		}
		
		public IEnumerable Generatables {
			get {
				return complex_types.Values;
			}
		}
		
		private String Trim(String type)
		{
			char[] ast = {'*'};
			String trim_type = type.TrimEnd(ast);
			if (trim_type.StartsWith("const-")) return trim_type.Substring(6);
			return trim_type;
		}

		public String FromNative(String c_type, String val)
		{
			c_type = Trim(c_type);
			if (simple_types.ContainsKey(c_type)) {
				return val;
			} else if (complex_types.ContainsKey(c_type)) {
				IGeneratable gen = (IGeneratable) complex_types[c_type];
				return gen.FromNative(val);
			} else {
				return "";
			}
		}
		
		public String GetCSType(String c_type)
		{
			c_type = Trim(c_type);
			if (simple_types.ContainsKey(c_type)) {
				return (String) simple_types[c_type];
			} else if (complex_types.ContainsKey(c_type)) {
				IGeneratable gen = (IGeneratable) complex_types[c_type];
				return gen.QualifiedName;
			} else {
				return "";
			}
		}
		
		public String GetName(String c_type)
		{
			c_type = Trim(c_type);
			if (simple_types.ContainsKey(c_type)) {
				String stype = (String) simple_types[c_type];
				int dotidx = stype.IndexOf(".");
				if (dotidx == -1) {
					return stype;
				} else {
					return stype.Substring(dotidx+1);
				}
			} else if (complex_types.ContainsKey(c_type)) {
				IGeneratable gen = (IGeneratable) complex_types[c_type];
				return gen.Name;
			} else {
				return "";
			}
		}
		
		public String GetDllName(String ns)
		{
			return (String) dlls[ns];
		}
		
		public String GetMarshalType(String c_type)
		{
			c_type = Trim(c_type);
			if (simple_types.ContainsKey(c_type)) {
				return (String) simple_types[c_type];
			} else if (complex_types.ContainsKey(c_type)) {
				IGeneratable gen = (IGeneratable) complex_types[c_type];
				return gen.MarshalType;
			} else {
				return "";
			}
		}
		
		public String CallByName(String c_type, String var_name)
		{
			c_type = Trim(c_type);
			if (simple_types.ContainsKey(c_type)) {
				return var_name;
			} else if (complex_types.ContainsKey(c_type)) {
				IGeneratable gen = (IGeneratable) complex_types[c_type];
				return gen.CallByName(var_name);
			} else {
				return "";
			}
		}
		
		public bool IsBoxed(String c_type)
		{
			c_type = Trim(c_type);
			if (complex_types.ContainsKey(c_type)) {
				IGeneratable gen = (IGeneratable) complex_types[c_type];
				if (gen is BoxedGen) {
					return true;
				}
			}
			return false;
		}
		
		public bool IsInterface(String c_type)
		{
			c_type = Trim(c_type);
			if (complex_types.ContainsKey(c_type)) {
				IGeneratable gen = (IGeneratable) complex_types[c_type];
				if (gen is InterfaceGen) {
					return true;
				}
			}
			return false;
		}
		
		public bool IsObject(String c_type)
		{
			c_type = Trim(c_type);
			if (complex_types.ContainsKey(c_type)) {
				IGeneratable gen = (IGeneratable) complex_types[c_type];
				if (gen is ObjectGen) {
					return true;
				}
			}
			return false;
		}
	}
}