175 lines
8.5 KiB
C++
175 lines
8.5 KiB
C++
/*
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* moocpp/gobjref.h
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*
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* Copyright (C) 2004-2016 by Yevgen Muntyan <emuntyan@users.sourceforge.net>
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*
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* This file is part of medit. medit is free software; you can
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* redistribute it and/or modify it under the terms of the
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* GNU Lesser General Public License as published by the
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* Free Software Foundation; either version 2.1 of the License,
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* or (at your option) any later version.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with medit. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "moocpp/gobjinfo.h"
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namespace moo {
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template<typename Object>
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class gobj_ref;
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template<typename Object>
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class gobj_ptr;
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template<typename Object>
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class gobj_raw_ptr;
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template<typename CObject, typename CppObject>
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class gobj_wrapper;
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///////////////////////////////////////////////////////////////////////////////////////////
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//
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// gobj_ref
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//
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class gobj_ref_base
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{
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protected:
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gobj_ref_base() : m_gobj(nullptr) {}
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using object_type = GObject;
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public:
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gobj_ref_base(const gobj_ref_base&) = default;
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gobj_ref_base& operator=(const gobj_ref_base&) = default;
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gobj_ref_base(gobj_ref_base&& other)
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: m_gobj(other.m_gobj)
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{
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other.m_gobj = nullptr;
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}
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gobj_ref_base& operator=(gobj_ref_base&& other)
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{
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m_gobj = other.m_gobj;
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other.m_gobj = nullptr;
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return *this;
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}
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GObject* gobj() const { return m_gobj; }
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operator GObject&() const { return *m_gobj; }
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operator GTypeInstance&() const { return *reinterpret_cast<GTypeInstance*>(m_gobj); }
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protected:
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GObject* raw_gobj() const { return const_cast<GObject*>(m_gobj); }
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void** _pp ()
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{
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g_return_val_if_fail(m_gobj == nullptr, nullptr);
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return reinterpret_cast<void**>(&m_gobj);
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}
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private:
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template<typename Object> friend class gobj_ptr;
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template<typename Object> friend class gobj_raw_ptr;
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template<typename Object> friend class gobj_ref;
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template<typename CObject, typename CppObject> friend class gobj_wrapper;
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void _set_gobj(gpointer gobj) { m_gobj = reinterpret_cast<GObject*>(gobj); }
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private:
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GObject* m_gobj;
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};
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template<>
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class gobj_ref<GObject>; // : public gobj_ref_base
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#define MOO_DEFINE_GOBJREF_METHODS_IMPL(Object, Super) \
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using super = Super; \
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using object_type = Object; \
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using ptrtype = gobj_ptr<object_type>; \
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\
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protected: \
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friend class gobj_ptr<object_type>; \
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friend class gobj_raw_ptr<object_type>; \
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\
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gobj_ref() {} \
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\
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object_type** _pp () \
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{ \
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return reinterpret_cast<object_type**>(gobj_ref_base::_pp()); \
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} \
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\
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public: \
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gobj_ref(object_type& gobj) \
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{ \
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super::_set_gobj(&gobj); \
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} \
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\
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object_type* gobj() const \
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{ \
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return reinterpret_cast<object_type*>(super::raw_gobj()); \
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} \
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\
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template<typename X> \
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X* gobj() const \
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{ \
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return nc_gobj<X>(); \
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} \
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\
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object_type* nc_gobj() const \
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{ \
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return const_cast<object_type*>(gobj()); \
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} \
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\
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template<typename X> \
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X* nc_gobj() const \
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{ \
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object_type* o = const_cast<object_type*>(gobj()); \
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return gobj_is_subclass<Object, X>::down_cast(o); \
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} \
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\
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gobj_ref* self() { return this; } \
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const gobj_ref* self() const { return this; } \
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\
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operator object_type&() const { return *gobj(); } \
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gobj_raw_ptr<object_type> operator&() const { return nc_gobj(); } \
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\
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gobj_ref(const gobj_ref&) = default; \
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gobj_ref& operator=(const gobj_ref&) = default; \
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\
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gobj_ref(gobj_ref&& other) \
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: super(std::move(static_cast<super&&>(other))) \
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{ \
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} \
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\
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gobj_ref& operator=(gobj_ref&& other) \
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{ \
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super::operator=(std::move(static_cast<super&&>(other))); \
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return *this; \
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}
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#define MOO_DEFINE_GOBJREF_METHODS(Object) \
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MOO_DEFINE_GOBJREF_METHODS_IMPL(Object, gobj_ref<gobj_parent_type<Object>>)
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template<typename Object>
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using gobj_ref_parent = gobj_ref<gobj_parent_type<Object>>;
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// Generic implementation, falls back to the parent type's gobj_ref implementation
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// if that's known, or to GObject's one, coming from the generic gobjinfo.
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template<typename Object>
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class gobj_ref : public virtual gobj_ref_parent<Object>
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{
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public:
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MOO_DEFINE_GOBJREF_METHODS(Object)
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};
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} // namespace moo
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// Make sure these aren't called in code ported from pure glib C
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template<typename X>
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void g_object_unref(const moo::gobj_ref<X>*) = delete;
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template<typename X>
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void g_free(const moo::gobj_ref<X>*) = delete;
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