static IntPtr RegisterProperty(GType type, string name, string nick, string blurb, uint property_id, GType property_type, bool can_read, bool can_write)
{
IntPtr declaring_class = type.GetClassPtr();
ParamSpec pspec = new ParamSpec(name, nick, blurb, property_type, can_read, can_write);
g_object_class_install_property(declaring_class, property_id, pspec.Handle);
return(pspec.Handle);
}
static void AddProperties(GType gtype, System.Type t, bool register_instance_prop, ref bool handlers_overridden)
{
if (register_instance_prop)
{
IntPtr declaring_class = gtype.GetClassPtr();
ParamSpec pspec = new ParamSpec("gtk-sharp-managed-instance", "", "", GType.Pointer, ParamFlags.Writable | ParamFlags.ConstructOnly);
g_object_class_install_property(declaring_class, idx, pspec.Handle);
idx++;
}
foreach (PropertyInfo pinfo in t.GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly))
{
foreach (object attr in pinfo.GetCustomAttributes(typeof(PropertyAttribute), false))
{
if (pinfo.GetIndexParameters().Length > 0)
{
throw(new InvalidOperationException(String.Format("GLib.RegisterPropertyAttribute cannot be applied to property {0} of type {1} because the property expects one or more indexed parameters", pinfo.Name, t.FullName)));
}
if (!handlers_overridden)
{
IntPtr class_ptr = gtype.GetClassPtr();
GObjectClass gobject_class = (GObjectClass)Marshal.PtrToStructure(class_ptr, typeof(GObjectClass));
gobject_class.get_prop_cb = GetPropertyHandler;
gobject_class.set_prop_cb = SetPropertyHandler;
Marshal.StructureToPtr(gobject_class, class_ptr, false);
handlers_overridden = true;
}
PropertyAttribute property_attr = attr as PropertyAttribute;
try {
IntPtr param_spec = RegisterProperty(gtype, property_attr.Name, property_attr.Nickname, property_attr.Blurb, idx, (GType)pinfo.PropertyType, pinfo.CanRead, pinfo.CanWrite);
Type type = (Type)gtype;
Dictionary <IntPtr, PropertyInfo> gtype_properties;
if (!Properties.TryGetValue(type, out gtype_properties))
{
gtype_properties = new Dictionary <IntPtr, PropertyInfo> ();
Properties [type] = gtype_properties;
}
gtype_properties.Add(param_spec, pinfo);
idx++;
} catch (ArgumentException) {
throw new InvalidOperationException(String.Format("GLib.PropertyAttribute cannot be applied to property {0} of type {1} because the return type of the property is not supported", pinfo.Name, t.FullName));
}
}
}
}
void InitForProperty(GType gtype, string name)
{
IntPtr p_name = Marshaller.StringToPtrGStrdup(name);
IntPtr spec_ptr = g_object_class_find_property(gtype.GetClassPtr(), p_name);
Marshaller.Free(p_name);
if (spec_ptr == IntPtr.Zero)
{
throw new Exception(String.Format("No property with name '{0}' in type '{1}'", name, gtype.ToString()));
}
ParamSpec spec = new ParamSpec(spec_ptr);
g_value_init(ref this, spec.ValueType.Val);
}
protected internal static GType RegisterGType(System.Type t)
{
GType gtype = GType.RegisterGObjectType(t);
bool is_first_subclass = gtype.GetBaseType() == gtype.GetThresholdType();
if (is_first_subclass)
{
IntPtr class_ptr = gtype.GetClassPtr();
GObjectClass gobject_class = (GObjectClass)Marshal.PtrToStructure(class_ptr, typeof(GObjectClass));
gobject_class.constructor_cb = ConstructorHandler;
gobject_class.get_prop_cb = GetPropertyHandler;
gobject_class.set_prop_cb = SetPropertyHandler;
Marshal.StructureToPtr(gobject_class, class_ptr, false);
}
AddProperties(gtype, t, is_first_subclass);
ConnectDefaultHandlers(gtype, t);
InvokeTypeInitializers(gtype, t);
AddInterfaces(gtype, t);
return(gtype);
}
public static N BaseOverride <N>(this AbiStruct class_abi, GType gtype, string fieldname) where N : Delegate
{
N unmanaged = null;
unsafe {
IntPtr raw_ptr = IntPtr.Zero;
while (raw_ptr == IntPtr.Zero && GType.IsManaged(gtype))
{
gtype = gtype.GetThresholdType();
var abi_ptr = (IntPtr *)(((long)gtype.GetClassPtr()) + (long)class_abi.GetFieldOffset(fieldname));
raw_ptr = *abi_ptr;
}
if (raw_ptr != IntPtr.Zero)
{
unmanaged = Marshal.GetDelegateForFunctionPointer <N>(raw_ptr);
}
}
return(unmanaged);
}
static GstMiniObjectClass GetClassStruct(GLib.GType gtype, bool use_cache)
{
if (class_structs == null)
{
class_structs = new Hashtable();
}
if (use_cache && class_structs.Contains(gtype))
{
return((GstMiniObjectClass)class_structs [gtype]);
}
else
{
IntPtr class_ptr = gtype.GetClassPtr();
GstMiniObjectClass class_struct = (GstMiniObjectClass)Marshal.PtrToStructure(class_ptr, typeof(GstMiniObjectClass));
if (use_cache)
{
class_structs.Add(gtype, class_struct);
}
return(class_struct);
}
}
private void OverrideHandlers(bool ctor, bool properties)
{
OverrideHandlers(gtype.GetClassPtr(), ctor, properties);
}
static IntPtr RegisterProperty(GType type, string name, string nick, string blurb, uint property_id, GType property_type, bool can_read, bool can_write)
{
IntPtr declaring_class = type.GetClassPtr ();
ParamSpec pspec = new ParamSpec (name, nick, blurb, property_type, can_read, can_write);
g_object_class_install_property (declaring_class, property_id, pspec.Handle);
return pspec.Handle;
}
static void AddProperties(GType gtype, System.Type t, bool register_instance_prop, ref bool handlers_overridden)
{
if (register_instance_prop) {
IntPtr declaring_class = gtype.GetClassPtr ();
ParamSpec pspec = new ParamSpec ("gtk-sharp-managed-instance", "", "", GType.Pointer, ParamFlags.Writable | ParamFlags.ConstructOnly);
g_object_class_install_property (declaring_class, idx, pspec.Handle);
idx++;
}
foreach (PropertyInfo pinfo in t.GetProperties (BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly)) {
foreach (object attr in pinfo.GetCustomAttributes (typeof (PropertyAttribute), false)) {
if(pinfo.GetIndexParameters().Length > 0)
throw(new InvalidOperationException(String.Format("GLib.RegisterPropertyAttribute cannot be applied to property {0} of type {1} because the property expects one or more indexed parameters", pinfo.Name, t.FullName)));
if (!handlers_overridden) {
IntPtr class_ptr = gtype.GetClassPtr ();
GObjectClass gobject_class = (GObjectClass) Marshal.PtrToStructure (class_ptr, typeof (GObjectClass));
gobject_class.get_prop_cb = GetPropertyHandler;
gobject_class.set_prop_cb = SetPropertyHandler;
Marshal.StructureToPtr (gobject_class, class_ptr, false);
handlers_overridden = true;
}
PropertyAttribute property_attr = attr as PropertyAttribute;
try {
IntPtr param_spec = RegisterProperty (gtype, property_attr.Name, property_attr.Nickname, property_attr.Blurb, idx, (GType) pinfo.PropertyType, pinfo.CanRead, pinfo.CanWrite);
Properties.Add (param_spec, pinfo);
idx++;
} catch (ArgumentException) {
throw new InvalidOperationException (String.Format ("GLib.PropertyAttribute cannot be applied to property {0} of type {1} because the return type of the property is not supported", pinfo.Name, t.FullName));
}
}
}
}
static void AddInterfaces(GType gtype, Type t, ref bool handlers_overridden)
{
foreach (Type iface in t.GetInterfaces ()) {
if (!iface.IsDefined (typeof (GInterfaceAttribute), true))
continue;
GInterfaceAttribute attr = iface.GetCustomAttributes (typeof (GInterfaceAttribute), false) [0] as GInterfaceAttribute;
GInterfaceAdapter adapter = Activator.CreateInstance (attr.AdapterType, null) as GInterfaceAdapter;
if (!handlers_overridden) {
IntPtr class_ptr = gtype.GetClassPtr ();
GObjectClass gobject_class = (GObjectClass) Marshal.PtrToStructure (class_ptr, typeof (GObjectClass));
gobject_class.get_prop_cb = GetPropertyHandler;
gobject_class.set_prop_cb = SetPropertyHandler;
Marshal.StructureToPtr (gobject_class, class_ptr, false);
handlers_overridden = true;
}
if (!iface.IsAssignableFrom (t.BaseType)) {
GInterfaceInfo info = adapter.Info;
info.Data = gtype.GetClassPtr ();
//FIXME: overiding prop is done inside the init of interface adapter
// not sure that it is the good solution but
// it is the only one I found without exception or loop
g_type_add_interface_static (gtype.Val, adapter.GType.Val, ref info);
}
foreach (PropertyInfo p in iface.GetProperties ()) {
PropertyAttribute[] attrs = p.GetCustomAttributes (typeof (PropertyAttribute), true) as PropertyAttribute [];
if (attrs.Length == 0)
continue;
PropertyAttribute property_attr = attrs [0];
PropertyInfo declared_prop = t.GetProperty (p.Name, BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.Instance);
if (declared_prop == null)
continue;
IntPtr param_spec = FindInterfaceProperty (adapter.GType, property_attr.Name);
Properties [param_spec] = declared_prop;
}
}
}
void InitForProperty (GType gtype, string name)
{
IntPtr p_name = Marshaller.StringToPtrGStrdup (name);
IntPtr spec_ptr = g_object_class_find_property (gtype.GetClassPtr (), p_name);
Marshaller.Free (p_name);
if (spec_ptr == IntPtr.Zero)
throw new Exception (String.Format ("No property with name '{0}' in type '{1}'", name, gtype.ToString()));
ParamSpec spec = new ParamSpec (spec_ptr);
g_value_init (ref this, spec.ValueType.Val);
}
static void OverrideClassStruct(GLib.GType gtype, GstMiniObjectClass class_struct)
{
IntPtr class_ptr = gtype.GetClassPtr();
Marshal.StructureToPtr(class_struct, class_ptr, false);
}
