/usr/lib/x86_64-linux-gnu/glibmm-2.4/proc/m4/class_interface.m4 is in libglibmm-2.4-dev 2.42.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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define(`_CLASS_INTERFACE',`dnl
_PUSH()
dnl
dnl Define the args for later macros
define(`__CPPNAME__',`$1')
define(`__CNAME__',`$2')
define(`__CCAST__',`$3')
define(`__CCLASS__',`$4') dnl SomethingIface or SomethingClass, both suffixes are used.
define(`__BASE__',_LOWER(__CPPNAME__))
define(`__CPPPARENT__',m4_ifelse($5,`',`Glib::Interface',$5)) #Optional parameter.
define(`__CPARENT__',m4_ifelse($6,`',`GObject',$6)) #Optional parameter.
define(`__PCAST__',`(__CPARENT__`'*)')
define(`__BOOL_IS_INTERFACE__',`1')
dnl For classes that need custom code in their cast constructor.
define(`_CUSTOM_CTOR_CAST',`dnl
_PUSH()
dnl Define this macro to be tested for later.
define(`__BOOL_CUSTOM_CTOR_CAST__',`$1')
_POP()
')
_POP()
_SECTION(SECTION_CLASS2)
') dnl end of _CLASS_INTERFACE
dnl Some of the Gdk types are actually direct typedefs of their base type.
dnl This means that 2 wrap functions would have the same argument.
dnl define(`_NO_WRAP_FUNCTION',`dnl
dnl _PUSH()
dnl Define this macro to be tested for later.
dnl define(`__BOOL_NO_WRAP_FUNCTION__',`$1')
dnl _POP()
dnl ')
dnl
dnl
dnl
define(`_PH_CLASS_DECLARATION_INTERFACE',`dnl
class __CPPNAME__`'_Class : public __CPPPARENT__`'_Class
{
public:
typedef __CPPNAME__ CppObjectType;
typedef __CNAME__ BaseObjectType;
typedef __CCLASS__ BaseClassType;
typedef __CPPPARENT__`'_Class CppClassParent;
friend class __CPPNAME__;
const Glib::Interface_Class& init();
static void iface_init_function(void* g_iface, void* iface_data);
static Glib::ObjectBase* wrap_new(GObject*);
protected:
//Callbacks (default signal handlers):
//These will call the *_impl member methods, which will then call the existing default signal callbacks, if any.
//You could prevent the original default signal handlers being called by overriding the *_impl method.
_IMPORT(SECTION_PH_DEFAULT_SIGNAL_HANDLERS)
//Callbacks (virtual functions):
_IMPORT(SECTION_PH_VFUNCS)
};
')
dnl
dnl
dnl
define(`_PCC_CLASS_IMPLEMENTATION_INTERFACE',`dnl
const Glib::Interface_Class& __CPPNAME__`'_Class::init()
{
if(!gtype_) // create the GType if necessary
{
// Glib::Interface_Class has to know the interface init function
// in order to add interfaces to implementing types.
class_init_func_ = &__CPPNAME__`'_Class::iface_init_function;
// We can not derive from another interface, and it is not necessary anyway.
gtype_ = _LOWER(__CCAST__)_get_type();
}
return *this;
}
void __CPPNAME__`'_Class::iface_init_function(void* g_iface, void*)
{
BaseClassType *const klass = static_cast<BaseClassType*>(g_iface);
//This is just to avoid an "unused variable" warning when there are no vfuncs or signal handlers to connect.
//This is a temporary fix until I find out why I can not seem to derive a GtkFileChooser interface. murrayc
g_assert(klass != 0);
_IMPORT(SECTION_PCC_CLASS_INIT_VFUNCS)
_IMPORT(SECTION_PCC_CLASS_INIT_DEFAULT_SIGNAL_HANDLERS)
}
_IMPORT(SECTION_PCC_VFUNCS)
_IMPORT(SECTION_PCC_DEFAULT_SIGNAL_HANDLERS)
')
dnl
dnl _END_CLASS_INTERFACE()
dnl denotes the end of a class
dnl
define(`_END_CLASS_INTERFACE',`
_SECTION(SECTION_HEADER1)
_STRUCT_PROTOTYPE()
__NAMESPACE_BEGIN__ class __CPPNAME__`'_Class; __NAMESPACE_END__
_SECTION(SECTION_HEADER3)
ifdef(`__BOOL_NO_WRAP_FUNCTION__',`dnl
',`dnl
namespace Glib
{
/** A Glib::wrap() method for this object.
*
* @param object The C instance.
* @param take_copy False if the result should take ownership of the C instance. True if it should take a new copy or ref.
* @result A C++ instance that wraps this C instance.
*
* @relates __NAMESPACE__::__CPPNAME__
*/
Glib::RefPtr<__NAMESPACE__::__CPPNAME__> wrap(__CNAME__`'* object, bool take_copy = false);
} // namespace Glib
')dnl
dnl
dnl
_SECTION(SECTION_PHEADER)
#include <glibmm/private/interface_p.h>
__NAMESPACE_BEGIN__
_PH_CLASS_DECLARATION_INTERFACE()
__NAMESPACE_END__
_SECTION(SECTION_SRC_GENERATED)
ifdef(`__BOOL_NO_WRAP_FUNCTION__',`dnl
',`dnl else
namespace Glib
{
Glib::RefPtr<__NAMESPACE__::__CPPNAME__> wrap(__CNAME__`'* object, bool take_copy)
{
return Glib::RefPtr<__NAMESPACE__::__CPPNAME__>( dynamic_cast<__NAMESPACE__::__CPPNAME__*> (Glib::wrap_auto_interface<__NAMESPACE__::__CPPNAME__> ((GObject*)(object), take_copy)) );
//We use dynamic_cast<> in case of multiple inheritance.
}
} // namespace Glib
')dnl endif
__NAMESPACE_BEGIN__
/* The *_Class implementation: */
_PCC_CLASS_IMPLEMENTATION_INTERFACE()
Glib::ObjectBase* __CPPNAME__`'_Class::wrap_new(GObject* object)
{
return new __CPPNAME__`'((__CNAME__*)`'(object));
}
/* The implementation: */
__CPPNAME__::__CPPNAME__`'()
:
__CPPPARENT__`'(__BASE__`'_class_.init())
{}
ifdef(`__BOOL_CUSTOM_CTOR_CAST__',`dnl
',`dnl
__CPPNAME__::__CPPNAME__`'(__CNAME__* castitem)
:
__CPPPARENT__`'(__PCAST__`'(castitem))
{}
')dnl
__CPPNAME__::__CPPNAME__`'(const Glib::Interface_Class& interface_class)
: __CPPPARENT__`'(interface_class)
{
}
__CPPNAME__::~__CPPNAME__`'()
{}
// static
void __CPPNAME__`'::add_interface(GType gtype_implementer)
{
__BASE__`'_class_.init().add_interface(gtype_implementer);
}
_CC_CLASS_IMPLEMENTATION()
__NAMESPACE_END__
dnl
dnl
dnl
dnl
_POP()
dnl
dnl The actual class, e.g. Gtk::Widget, declaration:
dnl _IMPORT(SECTION_H_SIGNALPROXIES_CUSTOM)
_IMPORT(SECTION_CLASS1)
#ifndef DOXYGEN_SHOULD_SKIP_THIS
public:
typedef __CPPNAME__ CppObjectType;
typedef __CPPNAME__`'_Class CppClassType;
typedef __CNAME__ BaseObjectType;
typedef __CCLASS__ BaseClassType;
private:
friend class __CPPNAME__`'_Class;
static CppClassType `'__BASE__`'_class_;
// noncopyable
__CPPNAME__`'(const __CPPNAME__&);
__CPPNAME__& operator=(const __CPPNAME__&);
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
protected:
/**
* You should derive from this class to use it.
*/
__CPPNAME__`'();
#ifndef DOXYGEN_SHOULD_SKIP_THIS
/** Called by constructors of derived classes. Provide the result of
* the Class init() function to ensure that it is properly
* initialized.
*
* @param interface_class The Class object for the derived type.
*/
explicit __CPPNAME__`'(const Glib::Interface_Class& interface_class);
public:
// This is public so that C++ wrapper instances can be
// created for C instances of unwrapped types.
// For instance, if an unexpected C type implements the C interface.
explicit __CPPNAME__`'(__CNAME__* castitem);
protected:
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
public:
_IMPORT(SECTION_DTOR_DOCUMENTATION)
virtual ~__CPPNAME__`'();
static void add_interface(GType gtype_implementer);
/** Get the GType for this class, for use with the underlying GObject type system.
*/
static GType get_type() G_GNUC_CONST;
#ifndef DOXYGEN_SHOULD_SKIP_THIS
static GType get_base_type() G_GNUC_CONST;
#endif
///Provides access to the underlying C GObject.
__CNAME__* gobj() { return reinterpret_cast<__CNAME__*>(gobject_); }
///Provides access to the underlying C GObject.
const __CNAME__* gobj() const { return reinterpret_cast<__CNAME__*>(gobject_); }
private:
_IMPORT(SECTION_CLASS2)
public:
_H_VFUNCS_AND_SIGNALS()
')
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