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/* valasignaltype.vala
*
* Copyright (C) 2007-2011 Jürg Billeter
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library 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
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Author:
* Jürg Billeter <j@bitron.ch>
*/
using GLib;
/**
* The type of a signal referencea.
*/
public class Vala.SignalType : CallableType {
public weak Signal signal_symbol {
get {
return (Signal) symbol;
}
}
Method? connect_method;
Method? connect_after_method;
Method? disconnect_method;
Method? emit_method;
public SignalType (Signal signal_symbol, SourceReference? source_reference = null) {
base (signal_symbol, source_reference);
}
public override DataType copy () {
return new SignalType (signal_symbol, source_reference);
}
public override bool compatible (DataType target_type) {
return false;
}
public override string to_qualified_string (Scope? scope) {
return signal_symbol.get_full_name ();
}
public DelegateType get_handler_type () {
var type_sym = (ObjectTypeSymbol) signal_symbol.parent_symbol;
var sender_type = SemanticAnalyzer.get_data_type_for_symbol (type_sym);
var result = new DelegateType (signal_symbol.get_delegate (sender_type, this), source_reference);
result.value_owned = true;
if (result.delegate_symbol.has_type_parameters ()) {
foreach (var type_param in type_sym.get_type_parameters ()) {
var type_arg = new GenericType (type_param, source_reference);
type_arg.value_owned = true;
result.add_type_argument (type_arg);
}
}
return result;
}
unowned Method get_connect_method () {
if (connect_method == null) {
var ulong_type = CodeContext.get ().analyzer.ulong_type.copy ();
connect_method = new Method ("connect", ulong_type, source_reference);
connect_method.access = SymbolAccessibility.PUBLIC;
connect_method.external = true;
connect_method.owner = signal_symbol.scope;
connect_method.add_parameter (new Parameter ("handler", get_handler_type (), source_reference));
}
return connect_method;
}
unowned Method get_connect_after_method () {
if (connect_after_method == null) {
var ulong_type = CodeContext.get ().analyzer.ulong_type.copy ();
connect_after_method = new Method ("connect_after", ulong_type, source_reference);
connect_after_method.access = SymbolAccessibility.PUBLIC;
connect_after_method.external = true;
connect_after_method.owner = signal_symbol.scope;
connect_after_method.add_parameter (new Parameter ("handler", get_handler_type (), source_reference));
}
return connect_after_method;
}
unowned Method get_disconnect_method () {
if (disconnect_method == null) {
disconnect_method = new Method ("disconnect", new VoidType (), source_reference);
disconnect_method.access = SymbolAccessibility.PUBLIC;
disconnect_method.external = true;
disconnect_method.owner = signal_symbol.scope;
disconnect_method.add_parameter (new Parameter ("handler", get_handler_type (), source_reference));
}
return disconnect_method;
}
unowned Method get_emit_method () {
if (emit_method == null) {
emit_method = new Method ("emit", signal_symbol.return_type, source_reference);
emit_method.access = SymbolAccessibility.PUBLIC;
emit_method.external = true;
emit_method.owner = signal_symbol.scope;
}
return emit_method;
}
public override Symbol? get_member (string member_name) {
if (member_name == "connect") {
return get_connect_method ();
} else if (member_name == "connect_after") {
return get_connect_after_method ();
} else if (member_name == "disconnect") {
return get_disconnect_method ();
} else if (member_name == "emit") {
return get_emit_method ();
}
return null;
}
public override bool is_accessible (Symbol sym) {
return signal_symbol.is_accessible (sym);
}
}
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