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/* valaccodeinterfacebinding.vala
*
* Copyright (C) 2006-2008 Jürg Billeter, Raffaele Sandrini
*
* 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>
* Raffaele Sandrini <raffaele@sandrini.ch>
*/
using GLib;
public class Vala.CCodeInterfaceBinding : CCodeObjectTypeSymbolBinding {
public Interface iface { get; set; }
public CCodeInterfaceBinding (CCodeGenerator codegen, Interface iface) {
this.iface = iface;
this.codegen = codegen;
}
public override void emit () {
codegen.current_symbol = iface;
codegen.current_type_symbol = iface;
if (iface.get_cname().len () < 3) {
iface.error = true;
Report.error (iface.source_reference, "Interface name `%s' is too short".printf (iface.get_cname ()));
return;
}
CCodeFragment decl_frag;
CCodeFragment def_frag;
if (iface.access != SymbolAccessibility.PRIVATE) {
decl_frag = codegen.header_type_declaration;
def_frag = codegen.header_type_definition;
} else {
decl_frag = codegen.source_type_declaration;
def_frag = codegen.source_type_definition;
}
if (!iface.is_static) {
codegen.type_struct = new CCodeStruct ("_%s".printf (iface.get_type_cname ()));
decl_frag.append (new CCodeNewline ());
var macro = "(%s_get_type ())".printf (iface.get_lower_case_cname (null));
decl_frag.append (new CCodeMacroReplacement (iface.get_type_id (), macro));
macro = "(G_TYPE_CHECK_INSTANCE_CAST ((obj), %s, %s))".printf (iface.get_type_id (), iface.get_cname ());
decl_frag.append (new CCodeMacroReplacement ("%s(obj)".printf (iface.get_upper_case_cname (null)), macro));
macro = "(G_TYPE_CHECK_INSTANCE_TYPE ((obj), %s))".printf (iface.get_type_id ());
decl_frag.append (new CCodeMacroReplacement ("%s(obj)".printf (iface.get_upper_case_cname ("IS_")), macro));
macro = "(G_TYPE_INSTANCE_GET_INTERFACE ((obj), %s, %s))".printf (iface.get_type_id (), iface.get_type_cname ());
decl_frag.append (new CCodeMacroReplacement ("%s_GET_INTERFACE(obj)".printf (iface.get_upper_case_cname (null)), macro));
decl_frag.append (new CCodeNewline ());
if (iface.source_reference.file.cycle == null) {
decl_frag.append (new CCodeTypeDefinition ("struct _%s".printf (iface.get_cname ()), new CCodeVariableDeclarator (iface.get_cname ())));
decl_frag.append (new CCodeTypeDefinition ("struct %s".printf (codegen.type_struct.name), new CCodeVariableDeclarator (iface.get_type_cname ())));
}
codegen.type_struct.add_field ("GTypeInterface", "parent_iface");
if (iface.source_reference.comment != null) {
def_frag.append (new CCodeComment (iface.source_reference.comment));
}
def_frag.append (codegen.type_struct);
}
iface.accept_children (codegen);
if (!iface.is_static) {
add_interface_base_init_function (iface);
var type_fun = new InterfaceRegisterFunction (iface);
type_fun.init_from_type ();
if (iface.access != SymbolAccessibility.PRIVATE) {
codegen.header_type_member_declaration.append (type_fun.get_declaration ());
} else {
codegen.source_type_member_declaration.append (type_fun.get_declaration ());
}
codegen.source_type_member_definition.append (type_fun.get_definition ());
}
codegen.current_type_symbol = null;
}
private void add_interface_base_init_function (Interface iface) {
var base_init = new CCodeFunction ("%s_base_init".printf (iface.get_lower_case_cname (null)), "void");
base_init.add_parameter (new CCodeFormalParameter ("iface", "%sIface *".printf (iface.get_cname ())));
base_init.modifiers = CCodeModifiers.STATIC;
var init_block = new CCodeBlock ();
/* make sure not to run the initialization code twice */
base_init.block = new CCodeBlock ();
var decl = new CCodeDeclaration (codegen.bool_type.get_cname ());
decl.modifiers |= CCodeModifiers.STATIC;
decl.add_declarator (new CCodeVariableDeclarator.with_initializer ("initialized", new CCodeConstant ("FALSE")));
base_init.block.add_statement (decl);
var cif = new CCodeIfStatement (new CCodeUnaryExpression (CCodeUnaryOperator.LOGICAL_NEGATION, new CCodeIdentifier ("initialized")), init_block);
base_init.block.add_statement (cif);
init_block.add_statement (new CCodeExpressionStatement (new CCodeAssignment (new CCodeIdentifier ("initialized"), new CCodeConstant ("TRUE"))));
if (iface.is_subtype_of (codegen.gobject_type)) {
/* create properties */
var props = iface.get_properties ();
foreach (Property prop in props) {
var cinst = new CCodeFunctionCall (new CCodeIdentifier ("g_object_interface_install_property"));
cinst.add_argument (new CCodeIdentifier ("iface"));
cinst.add_argument (get_param_spec (prop));
init_block.add_statement (new CCodeExpressionStatement (cinst));
}
}
/* create signals */
foreach (Signal sig in iface.get_signals ()) {
init_block.add_statement (new CCodeExpressionStatement (get_signal_creation (sig, iface)));
}
// connect default implementations
foreach (Method m in iface.get_methods ()) {
if (m.is_virtual) {
var ciface = new CCodeIdentifier ("iface");
var cname = m.get_real_cname ();
base_init.block.add_statement (new CCodeExpressionStatement (new CCodeAssignment (new CCodeMemberAccess.pointer (ciface, m.vfunc_name), new CCodeIdentifier (cname))));
}
}
init_block.add_statement (register_dbus_info (iface));
codegen.source_type_member_definition.append (base_init);
}
}
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