context: // GtkSharp.Generation.Method.cs - The Method Generatable.
  //
  // Author: Mike Kestner <mkestner@speakeasy.net>
  //
  // Copyright (c) 2001-2003 Mike Kestner
  // Copyright (c) 2003-2004 Novell, Inc.
  //
  // This program is free software; you can redistribute it and/or
  // modify it under the terms of version 2 of the GNU General Public
  // License as published by the Free Software Foundation.
  //
  // This program is distributed in the hope that it will be useful,
  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  // General Public License for more details.
  //
  // You should have received a copy of the GNU General Public
  // License along with this program; if not, write to the
  // Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  // Boston, MA 02111-1307, USA.
  
  
  namespace GtkSharp.Generation {
  
  	using System;
  	using System.Collections;
  	using System.IO;
  	using System.Xml;
  
  	public class Method : MethodBase  {
  		
  		private ReturnValue retval;
  
  		private string call;
  		private bool is_get, is_set;
  		private bool deprecated = false;
  		private bool win32_utf8_variant = false;
  
  		public Method (XmlElement elem, ClassBase container_type) : base (elem, container_type)
  		{
  			this.retval = new ReturnValue (elem["return-type"]);
  			
  			if (!container_type.IsDeprecated && elem.HasAttribute ("deprecated")) {
  				string attr = elem.GetAttribute ("deprecated");
  				deprecated = attr == "1" || attr == "true";
  			}
  			
  			if (elem.HasAttribute ("win32_utf8_variant")) {
  				string attr = elem.GetAttribute ("win32_utf8_variant");
  				win32_utf8_variant = attr == "1" || attr.ToLower () == "true";
  			}
  
  			if (Name == "GetType")
  				Name = "GetGType";
  		}
  
  		public bool HasWin32Utf8Variant {
  			get { return win32_utf8_variant; }
  		}
  
  		public bool IsDeprecated {
  			get {
  				return deprecated;
  			}
  		}
  
  		public bool IsGetter {
  			get {
  				return is_get;
  			}
  		}
  
  		public bool IsSetter {
  			get {
  				return is_set;
  			}
  		}
  
  		public string ReturnType {
  			get {
  				return retval.CSType;
  			}
  		}
  
  		public override bool Validate (LogWriter log)
  		{
  			log.Member = Name;
  			if (!retval.Validate (log) || !base.Validate (log))
  				return false;
  
  			Parameters parms = Parameters;
  			is_get = ((((parms.IsAccessor && retval.IsVoid) || (parms.Count == 0 && !retval.IsVoid)) || (parms.Count == 0 && !retval.IsVoid)) && HasGetterName);
  			is_set = ((parms.IsAccessor || (parms.VisibleCount == 1 && retval.IsVoid)) && HasSetterName);
  
  			call = "(" + (IsStatic ? "" : container_type.CallByName () + (parms.Count > 0 ? ", " : "")) + Body.GetCallString (is_set) + ")";
  
  			return true;
  		}
  		
  		private Method GetComplement ()
  		{
  			char complement;
  			if (is_get)
  				complement = 'S';
  			else
  				complement = 'G';
  			
  			return container_type.GetMethod (complement + BaseName.Substring (1));
  		}
  		
  		public string Declaration {
  			get {
  				return retval.CSType + " " + Name + " (" + (Signature != null ? Signature.ToString() : "") + ");";
  			}
  		}
  
  		private void GenerateDeclCommon (StreamWriter sw, ClassBase implementor)
  		{
  			if (IsStatic)
  				sw.Write("static ");
  			sw.Write (Safety);
  			Method dup = null;
  			if (container_type != null)
  				dup = container_type.GetMethodRecursively (Name);
  			if (implementor != null)
  				dup = implementor.GetMethodRecursively (Name);
  
  			if (Name == "ToString" && Parameters.Count == 0 && (!(container_type is InterfaceGen)|| implementor != null))
  				sw.Write("override ");
  			else if (Name == "GetGType" && (container_type is ObjectGen || container_type is MiniObjectGen))
  				sw.Write("new ");
  			else if (Modifiers == "new " || (dup != null && ((dup.Signature != null && Signature != null && dup.Signature.ToString() == Signature.ToString()) || (dup.Signature == null && Signature == null))))
  				sw.Write("new ");
  
  			if (is_get || is_set) {
  				if (retval.IsVoid)
  					sw.Write (Parameters.AccessorReturnType);
  				else
  					sw.Write(retval.CSType);
  				sw.Write(" ");
  				if (Name.StartsWith ("Get") || Name.StartsWith ("Set"))
  					sw.Write (Name.Substring (3));
  				else {
  					int dot = Name.LastIndexOf ('.');
  					if (dot != -1 && (Name.Substring (dot + 1, 3) == "Get" || Name.Substring (dot + 1, 3) == "Set"))
  						sw.Write (Name.Substring (0, dot + 1) + Name.Substring (dot + 4));
  					else
  						sw.Write (Name);
  				}
  				sw.WriteLine(" { ");
  			} else if (IsAccessor) {
  				sw.Write (Signature.AccessorType + " " + Name + "(" + Signature.AsAccessor + ")");
  			} else {
  				sw.Write(retval.CSType + " " + Name + "(" + (Signature != null ? Signature.ToString() : "") + ")");
  			}
  		}
  
  		public void GenerateDecl (StreamWriter sw)
  		{
  			if (IsStatic)
  				return;
  
  			if (is_get || is_set)
  			{
  				Method comp = GetComplement ();
  				if (comp != null && is_set)
  					return;
  			
  				sw.Write("\t\t");
  				GenerateDeclCommon (sw, null);
  
  				sw.Write("\t\t\t");
  				sw.Write ((is_get) ? "get;" : "set;");
  
  				if (comp != null && comp.is_set)
  					sw.WriteLine (" set;");
  				else
  					sw.WriteLine ();
  
  				sw.WriteLine ("\t\t}");
  			}
  			else
  			{
  				sw.Write("\t\t");
  				GenerateDeclCommon (sw, null);
  				sw.WriteLine (";");
  			}
  
  			Statistics.MethodCount++;
  		}
  
  		public void GenerateImport (StreamWriter sw)
  		{
  			string import_sig = IsStatic ? "" : container_type.MarshalType + " raw";
  			import_sig += !IsStatic && Parameters.Count > 0 ? ", " : "";
  			import_sig += Parameters.ImportSignature.ToString();
  			sw.WriteLine("\t\t[DllImport(\"" + LibraryName + "\", CallingConvention = CallingConvention.Cdecl)]");
  			if (retval.MarshalType.StartsWith ("[return:"))
  				sw.WriteLine("\t\t" + retval.MarshalType + " static extern " + Safety + retval.CSType + " " + CName + "(" + import_sig + ");");
  			else
  				sw.WriteLine("\t\tstatic extern " + Safety + retval.MarshalType + " " + CName + "(" + import_sig + ");");
  			sw.WriteLine();
  
  			if (HasWin32Utf8Variant) {
  				sw.WriteLine("\t\t[DllImport(\"" + LibraryName + "\")]");
  				if (retval.MarshalType.StartsWith ("[return:"))
  					sw.WriteLine("\t\t" + retval.MarshalType + " static extern " + Safety + retval.CSType + " " + CName + "_utf8(" + import_sig + ");");
  				else
  					sw.WriteLine("\t\tstatic extern " + Safety + retval.MarshalType + " " + CName + "_utf8(" + import_sig + ");");
  				sw.WriteLine();
  			}
  		}
  
  		public void Generate (GenerationInfo gen_info, ClassBase implementor)
  		{
  			Method comp = null;
  
  			gen_info.CurrentMember = Name;
  
  			/* we are generated by the get Method, if there is one */
  			if (is_set || is_get)
  			{
  				if (Modifiers != "new " && container_type.GetPropertyRecursively (Name.Substring (3)) != null)
  					return;
  				comp = GetComplement ();
  				if (comp != null && is_set) {
  
gt: 					if (Parameters.AccessorReturnType == comp.ReturnType)