gstreamer/generator/OpaqueGen.cs

237 lines
7.3 KiB
C#

// GtkSharp.Generation.OpaqueGen.cs - The Opaque Generatable.
//
// Author: Mike Kestner <mkestner@speakeasy.net>
//
// Copyright (c) 2001-2003 Mike Kestner
//
// 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 OpaqueGen : HandleBase {
public OpaqueGen (XmlElement ns, XmlElement elem) : base (ns, elem) {}
public override string FromNative(string var, bool owned)
{
return var + " == IntPtr.Zero ? null : (" + QualifiedName + ") Gst.GLib.Opaque.GetOpaque (" + var + ", typeof (" + QualifiedName + "), " + (owned ? "true" : "false") + ")";
}
private bool DisableRawCtor {
get {
return Elem.HasAttribute ("disable_raw_ctor");
}
}
public override void Generate (GenerationInfo gen_info)
{
gen_info.CurrentType = Name;
StreamWriter sw = gen_info.Writer = gen_info.OpenStream (Name);
sw.WriteLine ("namespace " + NS + " {");
sw.WriteLine ();
sw.WriteLine ("\tusing System;");
sw.WriteLine ("\tusing System.Collections;");
sw.WriteLine ("\tusing System.Runtime.InteropServices;");
sw.WriteLine ();
sw.WriteLine ("#region Autogenerated code");
SymbolTable table = SymbolTable.Table;
Method ref_, unref, dispose;
GetSpecialMethods (out ref_, out unref, out dispose);
if (IsDeprecated)
sw.WriteLine ("\t[Obsolete]");
sw.Write ("\t{0} partial {1}class " + Name, IsInternal ? "internal" : "public", IsAbstract ? "abstract " : String.Empty);
string cs_parent = table.GetCSType(Elem.GetAttribute("parent"));
if (cs_parent != "")
sw.Write (" : " + cs_parent);
else
sw.Write (" : Gst.GLib.Opaque");
foreach (string iface in managed_interfaces) {
if (Parent != null && Parent.Implements (iface))
continue;
sw.Write (", " + iface);
}
sw.WriteLine (" {");
sw.WriteLine ();
GenFields (gen_info);
GenMethods (gen_info, null, null);
GenCtors (gen_info);
if (ref_ != null) {
ref_.GenerateImport (sw);
sw.WriteLine ("\t\tprotected override void Ref (IntPtr raw)");
sw.WriteLine ("\t\t{");
sw.WriteLine ("\t\t\tif (!Owned) {");
sw.WriteLine ("\t\t\t\t" + ref_.CName + " (raw);");
sw.WriteLine ("\t\t\t\tOwned = true;");
sw.WriteLine ("\t\t\t}");
sw.WriteLine ("\t\t}");
sw.WriteLine ();
if (ref_.IsDeprecated) {
sw.WriteLine ("\t\t[Obsolete(\"" + QualifiedName + " is now refcounted automatically\")]");
if (ref_.ReturnType == "void")
sw.WriteLine ("\t\tpublic void Ref () {}");
else
sw.WriteLine ("\t\tpublic " + Name + " Ref () { return this; }");
sw.WriteLine ();
}
}
bool finalizer_needed = false;
if (unref != null) {
unref.GenerateImport (sw);
sw.WriteLine ("\t\tprotected override void Unref (IntPtr raw)");
sw.WriteLine ("\t\t{");
sw.WriteLine ("\t\t\tif (Owned) {");
sw.WriteLine ("\t\t\t\t" + unref.CName + " (raw);");
sw.WriteLine ("\t\t\t\tOwned = false;");
sw.WriteLine ("\t\t\t}");
sw.WriteLine ("\t\t}");
sw.WriteLine ();
if (unref.IsDeprecated) {
sw.WriteLine ("\t\t[Obsolete(\"" + QualifiedName + " is now refcounted automatically\")]");
sw.WriteLine ("\t\tpublic void Unref () {}");
sw.WriteLine ();
}
finalizer_needed = true;
}
if (dispose != null) {
dispose.GenerateImport (sw);
sw.WriteLine ("\t\tprotected override void Free (IntPtr raw)");
sw.WriteLine ("\t\t{");
sw.WriteLine ("\t\t\t" + dispose.CName + " (raw);");
sw.WriteLine ("\t\t}");
sw.WriteLine ();
if (dispose.IsDeprecated) {
sw.WriteLine ("\t\t[Obsolete(\"" + QualifiedName + " is now freed automatically\")]");
sw.WriteLine ("\t\tpublic void " + dispose.Name + " () {}");
sw.WriteLine ();
}
finalizer_needed = true;
}
if (finalizer_needed) {
sw.WriteLine ("\t\tclass FinalizerInfo {");
sw.WriteLine ("\t\t\tIntPtr handle;");
sw.WriteLine ();
sw.WriteLine ("\t\t\tpublic FinalizerInfo (IntPtr handle)");
sw.WriteLine ("\t\t\t{");
sw.WriteLine ("\t\t\t\tthis.handle = handle;");
sw.WriteLine ("\t\t\t}");
sw.WriteLine ();
sw.WriteLine ("\t\t\tpublic bool Handler ()");
sw.WriteLine ("\t\t\t{");
if (dispose != null)
sw.WriteLine ("\t\t\t\t{0} (handle);", dispose.CName);
else if (unref != null)
sw.WriteLine ("\t\t\t\t{0} (handle);", unref.CName);
sw.WriteLine ("\t\t\t\treturn false;");
sw.WriteLine ("\t\t\t}");
sw.WriteLine ("\t\t}");
sw.WriteLine ();
sw.WriteLine ("\t\t~{0} ()", Name);
sw.WriteLine ("\t\t{");
sw.WriteLine ("\t\t\tif (!Owned)");
sw.WriteLine ("\t\t\t\treturn;");
sw.WriteLine ("\t\t\tFinalizerInfo info = new FinalizerInfo (Handle);");
sw.WriteLine ("\t\t\tGst.GLib.Timeout.Add (50, new Gst.GLib.TimeoutHandler (info.Handler));");
sw.WriteLine ("\t\t}");
sw.WriteLine ();
}
#if false
Method copy = Methods ["Copy"] as Method;
if (copy != null && copy.Parameters.Count == 0) {
sw.WriteLine ("\t\tprotected override Gst.GLib.Opaque Copy (IntPtr raw)");
sw.WriteLine ("\t\t{");
sw.WriteLine ("\t\t\tGst.GLib.Opaque result = new " + QualifiedName + " (" + copy.CName + " (raw));");
sw.WriteLine ("\t\t\tresult.Owned = true;");
sw.WriteLine ("\t\t\treturn result;");
sw.WriteLine ("\t\t}");
sw.WriteLine ();
}
#endif
sw.WriteLine ("#endregion");
AppendCustom(sw, gen_info.CustomDir);
sw.WriteLine ("\t}");
sw.WriteLine ("}");
sw.Close ();
gen_info.Writer = null;
Statistics.OpaqueCount++;
}
void GetSpecialMethods (out Method ref_, out Method unref, out Method dispose)
{
ref_ = CheckSpecialMethod (GetMethod ("Ref"));
unref = CheckSpecialMethod (GetMethod ("Unref"));
dispose = GetMethod ("Free");
if (dispose == null) {
dispose = GetMethod ("Destroy");
if (dispose == null)
dispose = GetMethod ("Dispose");
}
dispose = CheckSpecialMethod (dispose);
}
Method CheckSpecialMethod (Method method)
{
if (method == null)
return null;
if (method.ReturnType != "void" &&
method.ReturnType != QualifiedName)
return null;
if (method.Signature.ToString () != "")
return null;
methods.Remove (method.Name);
return method;
}
protected override void GenCtors (GenerationInfo gen_info)
{
if (!DisableRawCtor) {
gen_info.Writer.WriteLine("\t\tpublic " + Name + "(IntPtr raw) : base(raw) {}");
gen_info.Writer.WriteLine();
}
base.GenCtors (gen_info);
}
}
}