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GenBase.cs

// GtkSharp.Generation.GenBase.cs - The Generatable base class.
//
// Author: Mike Kestner <mkestner@novell.com>
//
// Copyright (c) 2001-2002 Mike Kestner
// Copyright (c) 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.IO;
      using System.Xml;

      public abstract class GenBase : IGeneratable {
            
            private XmlElement ns;
            private XmlElement elem;

            protected GenBase (XmlElement ns, XmlElement elem)
            {
                  this.ns = ns;
                  this.elem = elem;
            }

            public string CName {
                  get {
                        return elem.GetAttribute ("cname");
                  }
            }

            public XmlElement Elem {
                  get {
                        return elem;
                  }
            }

            public bool IsInternal {
                  get {
                        if (elem.HasAttribute ("internal")) {
                              string attr = elem.GetAttribute ("internal");
                              return attr == "1" || attr == "true";
                        }
                        return false;
                  }
            }

            public string LibraryName {
                  get {
                        return ns.GetAttribute ("library");
                  }
            }

            public virtual string MarshalReturnType { 
                  get {
                        return MarshalType;
                  }
            }

            public abstract string MarshalType { get; }

            public string Name {
                  get {
                        return elem.GetAttribute ("name");
                  }
            }

            public string NS {
                  get {
                        return ns.GetAttribute ("name");
                  }
            }

            public abstract string DefaultValue { get; }

            public string QualifiedName {
                  get {
                        return NS + "." + Name;
                  }
            }

            public virtual string ToNativeReturnType { 
                  get {
                        return MarshalType;
                  }
            }

            protected void AppendCustom (StreamWriter sw, string custom_dir)
            {
                  char sep = Path.DirectorySeparatorChar;
                  string custom = custom_dir + sep + Name + ".custom";
                  if (File.Exists(custom)) {
                        sw.WriteLine ("#region Customized extensions");
                        sw.WriteLine ("#line 1 \"" + Name + ".custom\"");
                        FileStream custstream = new FileStream(custom, FileMode.Open, FileAccess.Read);
                        StreamReader sr = new StreamReader(custstream);
                        sw.WriteLine (sr.ReadToEnd ());
                        sw.WriteLine ("#endregion");
                        sr.Close ();
                  }
            }

            public abstract string CallByName (string var);

            public abstract string FromNative (string var);

            public virtual string FromNativeReturn (string var)
            {
                  return FromNative (var);
            }

            public virtual string ToNativeReturn (string var)
            {
                  return CallByName (var);
            }

            public abstract bool Validate ();

            public void Generate ()
            {
                  GenerationInfo geninfo = new GenerationInfo (ns);
                  Generate (geninfo);
            }

            public abstract void Generate (GenerationInfo geninfo);
      }
}


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