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/* valagdbusservertransformer.vala
*
* Copyright (C) 2011 Luca Bruno
*
* 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:
* Luca Bruno <lucabru@src.gnome.org>
*/
/**
* Code visitor for transforming the code tree related to DBus server.
*/
public class Vala.GDBusServerTransformer : GDBusClientTransformer {
public override void visit_class (Class cl) {
visit_object_type_symbol (cl);
base.visit_class (cl);
}
public override void visit_interface (Interface iface) {
visit_object_type_symbol (iface);
base.visit_interface (iface);
}
string generate_dbus_method_wrapper (Method m, ObjectTypeSymbol sym) {
Method wrapper;
wrapper_method (new VoidType (), "gdbus_server " + m.get_full_name (), out wrapper);
var object_type = SemanticAnalyzer.get_data_type_for_symbol (sym);
wrapper.add_parameter (new Parameter ("object", object_type));
wrapper.add_parameter (new Parameter ("arguments", data_type ("GLib.Variant", false)));
wrapper.add_parameter (new Parameter ("invocation", data_type ("GLib.DBusMethodInvocation", false)));
push_builder (new CodeBuilder.for_subroutine (wrapper));
var iter = b.add_temp_declaration (null, expression ("arguments.iterator ()"));
MethodCall call;
MethodCall finish_call;
Method ready = null;
CodeBuilder ready_builder = null;
if (m.coroutine) {
call = (MethodCall) expression (@"object.$(m.name).begin ()");
wrapper_method (new VoidType (), "gdbus_server_async_ready " + m.get_full_name (), out ready);
ready.add_parameter (new Parameter ("source_object", data_type ("GLib.Object", false)));
ready.add_parameter (new Parameter ("res", data_type ("GLib.AsyncResult", false)));
ready.add_parameter (new Parameter ("invocation", data_type ("GLib.DBusMethodInvocation", false)));
ready_builder = new CodeBuilder.for_subroutine (ready);
finish_call = (MethodCall) expression (@"(($object_type) source_object).$(m.name).end (res)");
} else {
call = finish_call = (MethodCall) expression (@"object.$(m.name) ()");
}
b.open_try ();
var out_args = new string[0];
var out_params = new Parameter[0];
var out_types = new DataType[0];
string fd_list = null;
string fd_index = null;
foreach (var param in m.get_parameters ()) {
string? type_name = null;
if (param.variable_type is ObjectType) {
type_name = param.variable_type.data_type.get_full_name ();
}
if (type_name == "GLib.Cancellable") {
call.add_argument (expression ("null"));
continue;
}
if (type_name == "GLib.BusName") {
call.add_argument (expression ("(GLib.BusName) invocation.get_sender ()"));
continue;
}
if (param.direction == ParameterDirection.IN) {
var arg = b.add_temp_declaration (copy_type (param.variable_type, true));
b.add_assignment (expression (arg), read_dbus_value (param.variable_type, get_dbus_signature (param) != null, iter, "invocation.get_message ()", ref fd_list, ref fd_index));
call.add_argument (expression (arg));
} else if (param.direction == ParameterDirection.OUT) {
if (m.coroutine) {
// declare the out argument in the ready callback
push_builder (ready_builder);
}
var arg = b.add_temp_declaration (copy_type (param.variable_type, true));
out_args += arg;
out_params += param;
out_types += param.variable_type.copy ();
finish_call.add_argument (new UnaryExpression (UnaryOperator.OUT, expression (arg), m.source_reference));
if (m.coroutine) {
pop_builder ();
}
}
}
b.add_catch_all ("_invocation_gerror_");
statements ("invocation.return_gerror (_invocation_gerror_); return;");
b.close ();
if (m.coroutine) {
call.add_argument (expression (@"(s, r) => $(ready.name) (s, r, invocation)"));
b.add_expression (call);
push_builder (ready_builder);
}
b.open_try ();
string result = null;
if (m.has_result) {
result = b.add_temp_declaration (copy_type (m.return_type));
b.add_assignment (expression (result), finish_call);
} else {
b.add_expression (finish_call);
}
b.add_catch_all ("_invocation_gerror_");
statements ("invocation.return_gerror (_invocation_gerror_); return;");
b.close ();
fd_list = null;
var reply = b.add_temp_declaration (null, expression ("new GLib.DBusMessage.method_reply (invocation.get_message ())"));
var builder = b.add_temp_declaration (null, expression ("new GLib.VariantBuilder (GLib.VariantType.TUPLE)"));
for (int i = 0; i < out_args.length; i++) {
write_dbus_value (out_types[i], get_dbus_signature (out_params[i]) != null, builder, out_args[i], ref fd_list);
}
if (result != null) {
write_dbus_value (m.return_type.copy (), get_dbus_signature (m) != null, builder, result, ref fd_list);
}
statements (@"$reply.set_body ($builder.end ());");
if (fd_list != null) {
statements (@"$reply.set_unix_fd_list ($fd_list);");
}
b.open_try ();
statements (@"invocation.get_connection ().send_message ($reply, GLib.DBusSendMessageFlags.NONE, null);");
b.add_catch_uncaught_error ();
b.close ();
if (m.coroutine) {
pop_builder ();
check (ready);
}
pop_builder ();
check (wrapper);
return wrapper.name;
}
public static bool is_dbus_visible (CodeNode node) {
var dbus_attribute = node.get_attribute ("DBus");
if (dbus_attribute != null
&& dbus_attribute.has_argument ("visible")
&& !dbus_attribute.get_bool ("visible")) {
return false;
}
return true;
}
void generate_interface_method_call (ObjectTypeSymbol sym) {
if (sym.scope.lookup ("dbus_interface_method_call") != null) {
return;
}
var im = new Method ("dbus_interface_method_call", new VoidType (), sym.source_reference);
im.access = SymbolAccessibility.PRIVATE;
im.binding = MemberBinding.STATIC;
im.add_parameter (new Parameter ("connection", data_type ("GLib.DBusConnection", false)));
im.add_parameter (new Parameter ("sender", data_type ("string", false)));
im.add_parameter (new Parameter ("object_path", data_type ("string", false)));
im.add_parameter (new Parameter ("interface_name", data_type ("string", false)));
im.add_parameter (new Parameter ("method_name", data_type ("string", false)));
im.add_parameter (new Parameter ("_parameters_", data_type ("GLib.Variant", false)));
im.add_parameter (new Parameter ("invocation", data_type ("GLib.DBusMethodInvocation", false)));
im.add_parameter (new Parameter ("user_data", new PointerType (new VoidType ())));
sym.add_method (im);
push_builder (new CodeBuilder.for_subroutine (im));
var object_type = SemanticAnalyzer.get_data_type_for_symbol (sym);
var object = b.add_temp_declaration (data_type (@"$object_type", false), expression (@"($object_type) (((GLib.Object[]) user_data)[0])"));
b.open_switch (expression ("method_name"), null);
b.add_return ();
foreach (var m in sym.get_methods ()) {
if (m is CreationMethod || m.binding != MemberBinding.INSTANCE
|| m.overrides || m.access != SymbolAccessibility.PUBLIC
|| !is_dbus_visible (m)) {
continue;
}
b.add_section (expression (@"\"$(get_dbus_name_for_member (m))\""));
var wrapper = generate_dbus_method_wrapper (m, sym);
statements (@"$wrapper ($object, _parameters_, invocation);");
b.add_break ();
}
b.close ();
pop_builder ();
check (im);
}
void generate_interface_get_property (ObjectTypeSymbol sym) {
if (sym.scope.lookup ("dbus_interface_get_property") != null) {
return;
}
var m = new Method ("dbus_interface_get_property", data_type ("GLib.Variant", true, true), sym.source_reference);
m.access = SymbolAccessibility.PRIVATE;
m.binding = MemberBinding.STATIC;
m.add_parameter (new Parameter ("connection", data_type ("GLib.DBusConnection", false)));
m.add_parameter (new Parameter ("sender", data_type ("string", false)));
m.add_parameter (new Parameter ("object_path", data_type ("string", false)));
m.add_parameter (new Parameter ("interface_name", data_type ("string", false)));
m.add_parameter (new Parameter ("property_name", data_type ("string", false)));
m.add_parameter (new Parameter ("error", new PointerType (new ErrorType (null, null))));
m.add_parameter (new Parameter ("user_data", new PointerType (new VoidType ())));
sym.add_method (m);
push_builder (new CodeBuilder.for_subroutine (m));
var object_type = SemanticAnalyzer.get_data_type_for_symbol (sym);
var object = b.add_temp_declaration (data_type (@"$object_type", false), expression (@"($object_type) (((GLib.Object[]) user_data)[0])"));
b.open_switch (expression ("property_name"), null);
statements ("return null;");
foreach (var prop in sym.get_properties ()) {
if (prop.binding != MemberBinding.INSTANCE
|| prop.overrides || prop.access != SymbolAccessibility.PUBLIC
|| !is_dbus_visible (prop)
|| prop.get_accessor == null) {
continue;
}
b.add_section (expression (@"\"$(get_dbus_name_for_member (prop))\""));
statements (@"return $object.$(prop.name);");
}
pop_builder ();
check (m);
}
void generate_interface_set_property (ObjectTypeSymbol sym) {
if (sym.scope.lookup ("dbus_interface_set_property") != null) {
return;
}
var m = new Method ("dbus_interface_set_property", data_type ("bool"), sym.source_reference);
m.access = SymbolAccessibility.PRIVATE;
m.binding = MemberBinding.STATIC;
m.add_parameter (new Parameter ("connection", data_type ("GLib.DBusConnection", false)));
m.add_parameter (new Parameter ("sender", data_type ("string", false)));
m.add_parameter (new Parameter ("object_path", data_type ("string", false)));
m.add_parameter (new Parameter ("interface_name", data_type ("string", false)));
m.add_parameter (new Parameter ("property_name", data_type ("string", false)));
m.add_parameter (new Parameter ("value", data_type ("GLib.Variant", false)));
m.add_parameter (new Parameter ("error", new PointerType (new ErrorType (null, null))));
m.add_parameter (new Parameter ("user_data", new PointerType (new VoidType ())));
sym.add_method (m);
push_builder (new CodeBuilder.for_subroutine (m));
var object_type = SemanticAnalyzer.get_data_type_for_symbol (sym);
var object = b.add_temp_declaration (data_type (@"$object_type", false), expression (@"($object_type) (((GLib.Object[]) user_data)[0])"));
b.open_switch (expression ("property_name"), null);
statements ("return false;");
foreach (var prop in sym.get_properties ()) {
if (prop.binding != MemberBinding.INSTANCE
|| prop.overrides || prop.access != SymbolAccessibility.PUBLIC
|| !is_dbus_visible (prop)
|| prop.set_accessor == null) {
continue;
}
b.add_section (expression (@"\"$(get_dbus_name_for_member (prop))\""));
statements (@"$object.$(prop.name) = ($(prop.property_type)) value;
return true;");
}
pop_builder ();
check (m);
}
void generate_interface_signal_emitter (Signal sig, ObjectTypeSymbol sym, string dbus_iface_name) {
var wrapper_name = "_dbus_%s_%s".printf (get_ccode_lower_case_name (sym), get_ccode_lower_case_name (sig));
if (context.root.scope.lookup (wrapper_name) != null) {
return;
}
var m = new Method (wrapper_name, new VoidType (), sym.source_reference);
context.root.add_method (m);
m.access = SymbolAccessibility.PRIVATE;
m.binding = MemberBinding.STATIC;
m.add_parameter (new Parameter ("_sender", data_type ("GLib.Object", false)));
foreach (var param in sig.get_parameters ()) {
m.add_parameter (param.copy ());
}
m.add_parameter (new Parameter ("_data", new PointerType (new PointerType (new VoidType ()))));
push_builder (new CodeBuilder.for_subroutine (m));
var builder = b.add_temp_declaration (null, expression ("new GLib.VariantBuilder (GLib.VariantType.TUPLE)"));
foreach (var param in sig.get_parameters ()) {
if (get_dbus_signature (param) != null) {
statements (@"$builder.add_value ($(param.name));");
} else if (is_gvariant_type (param.variable_type)) {
statements (@"$builder.add (\"v\", $(param.name));");
} else {
statements (@"$builder.add_value ($(param.name));");
}
}
statements (@"((GLib.DBusConnection) _data[1]).emit_signal (null, (string) _data[2], \"$dbus_iface_name\", \"$(get_dbus_name_for_member (sig))\", $builder.end ());");
pop_builder ();
check (m);
}
void visit_object_type_symbol (ObjectTypeSymbol sym) {
string dbus_iface_name = get_dbus_name (sym);
if (dbus_iface_name == null) {
return;
}
if (!context.has_package ("gio-2.0")) {
if (!sym.error) {
Report.error (sym.source_reference, "gio-2.0 package required for dbus type symbols");
sym.error = true;
}
return;
}
generate_interface_method_call (sym);
generate_interface_get_property (sym);
generate_interface_set_property (sym);
foreach (var sig in sym.get_signals ()) {
if (sig.access != SymbolAccessibility.PUBLIC || !is_dbus_visible (sig)) {
continue;
}
generate_interface_signal_emitter (sig, sym, dbus_iface_name);
}
}
}
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