/////////////////////////////////////////////////////////////////////////////
// Name: wx/object.h
// Purpose: wxObject class, plus run-time type information macros
// Author: Julian Smart
// Modified by: Ron Lee
// Created: 01/02/97
// Copyright: (c) 1997 Julian Smart
// (c) 2001 Ron Lee <ron@debian.org>
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_OBJECTH__
#define _WX_OBJECTH__
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
// This really shouldn't be done here, but keep including this header for
// compatibility as it used to be included from here in the previous versions
// of wx and a lot of code would be broken by removing it.
#ifndef WXBUILDING
#include "wx/string.h"
#endif
// based on the value of wxUSE_EXTENDED_RTTI symbol,
// only one of the RTTI system will be compiled:
// - the "old" one (defined by rtti.h) or
// - the "new" one (defined by xti.h)
#include "wx/xti.h"
#include "wx/rtti.h"
#define wxIMPLEMENT_CLASS(name, basename) \
wxIMPLEMENT_ABSTRACT_CLASS(name, basename)
#define wxIMPLEMENT_CLASS2(name, basename1, basename2) \
wxIMPLEMENT_ABSTRACT_CLASS2(name, basename1, basename2)
// -----------------------------------
// for pluggable classes
// -----------------------------------
// NOTE: this should probably be the very first statement
// in the class declaration so wxPluginSentinel is
// the first member initialised and the last destroyed.
// _DECLARE_DL_SENTINEL(name) wxPluginSentinel m_pluginsentinel;
#if wxUSE_NESTED_CLASSES
#define _DECLARE_DL_SENTINEL(name, exportdecl) \
class exportdecl name##PluginSentinel { \
private: \
static const wxString sm_className; \
public: \
name##PluginSentinel(); \
~name##PluginSentinel(); \
}; \
name##PluginSentinel m_pluginsentinel
#define _IMPLEMENT_DL_SENTINEL(name) \
const wxString name::name##PluginSentinel::sm_className(#name); \
name::name##PluginSentinel::name##PluginSentinel() { \
wxPluginLibrary *e = (wxPluginLibrary*) wxPluginLibrary::ms_classes.Get(#name); \
if( e != 0 ) { e->RefObj(); } \
} \
name::name##PluginSentinel::~name##PluginSentinel() { \
wxPluginLibrary *e = (wxPluginLibrary*) wxPluginLibrary::ms_classes.Get(#name); \
if( e != 0 ) { e->UnrefObj(); } \
}
#else
#define _DECLARE_DL_SENTINEL(name)
#define _IMPLEMENT_DL_SENTINEL(name)
#endif // wxUSE_NESTED_CLASSES
#define wxDECLARE_PLUGGABLE_CLASS(name) \
wxDECLARE_DYNAMIC_CLASS(name); _DECLARE_DL_SENTINEL(name, WXDLLIMPEXP_CORE)
#define wxDECLARE_ABSTRACT_PLUGGABLE_CLASS(name) \
wxDECLARE_ABSTRACT_CLASS(name); _DECLARE_DL_SENTINEL(name, WXDLLIMPEXP_CORE)
#define wxDECLARE_USER_EXPORTED_PLUGGABLE_CLASS(name, usergoo) \
wxDECLARE_DYNAMIC_CLASS(name); _DECLARE_DL_SENTINEL(name, usergoo)
#define wxDECLARE_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, usergoo) \
wxDECLARE_ABSTRACT_CLASS(name); _DECLARE_DL_SENTINEL(name, usergoo)
#define wxIMPLEMENT_PLUGGABLE_CLASS(name, basename) \
wxIMPLEMENT_DYNAMIC_CLASS(name, basename) _IMPLEMENT_DL_SENTINEL(name)
#define wxIMPLEMENT_PLUGGABLE_CLASS2(name, basename1, basename2) \
wxIMPLEMENT_DYNAMIC_CLASS2(name, basename1, basename2) _IMPLEMENT_DL_SENTINEL(name)
#define wxIMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(name, basename) \
wxIMPLEMENT_ABSTRACT_CLASS(name, basename) _IMPLEMENT_DL_SENTINEL(name)
#define wxIMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2) \
wxIMPLEMENT_ABSTRACT_CLASS2(name, basename1, basename2) _IMPLEMENT_DL_SENTINEL(name)
#define wxIMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS(name, basename) \
wxIMPLEMENT_PLUGGABLE_CLASS(name, basename)
#define wxIMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS2(name, basename1, basename2) \
wxIMPLEMENT_PLUGGABLE_CLASS2(name, basename1, basename2)
#define wxIMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, basename) \
wxIMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(name, basename)
#define wxIMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2) \
wxIMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2)
#define wxCLASSINFO(name) (&name::ms_classInfo)
#define wxIS_KIND_OF(obj, className) obj->IsKindOf(&className::ms_classInfo)
// Just seems a bit nicer-looking (pretend it's not a macro)
#define wxIsKindOf(obj, className) obj->IsKindOf(&className::ms_classInfo)
// this cast does some more checks at compile time as it uses static_cast
// internally
//
// note that it still has different semantics from dynamic_cast<> and so can't
// be replaced by it as long as there are any compilers not supporting it
#define wxDynamicCast(obj, className) \
(static_cast<className*>(wxCheckDynamicCast( \
const_cast<wxObject *>(static_cast<const wxObject *>(obj)), \
&className::ms_classInfo)))
// The 'this' pointer is always true, so use this version
// to cast the this pointer and avoid compiler warnings.
#define wxDynamicCastThis(className) \
(IsKindOf(&className::ms_classInfo) ? (className*)this : nullptr)
template <class T>
inline T *wxCheckCast(const void *ptr)
{
wxASSERT_MSG( wxDynamicCast(ptr, T), "wxStaticCast() used incorrectly" );
return const_cast<T *>(static_cast<const T *>(ptr));
}
#define wxStaticCast(obj, className) wxCheckCast<className>(obj)
// ----------------------------------------------------------------------------
// Compatibility macro aliases DECLARE group
// ----------------------------------------------------------------------------
// deprecated variants _not_ requiring a semicolon after them and without wx prefix.
// (note that also some wx-prefixed macro do _not_ require a semicolon because
// it's not always possible to force the compiler to require it)
#define DECLARE_ABSTRACT_CLASS(n) wxDECLARE_ABSTRACT_CLASS(n);
#define DECLARE_DYNAMIC_CLASS_NO_ASSIGN(n) wxDECLARE_DYNAMIC_CLASS_NO_ASSIGN(n);
#define DECLARE_DYNAMIC_CLASS_NO_COPY(n) wxDECLARE_DYNAMIC_CLASS_NO_COPY(n);
#define DECLARE_DYNAMIC_CLASS(n) wxDECLARE_DYNAMIC_CLASS(n);
#define DECLARE_CLASS(n) wxDECLARE_CLASS(n);
#define DECLARE_PLUGGABLE_CLASS(n) wxDECLARE_PLUGGABLE_CLASS(n);
#define DECLARE_ABSTRACT_PLUGGABLE_CLASS(n) wxDECLARE_ABSTRACT_PLUGGABLE_CLASS(n);
#define DECLARE_USER_EXPORTED_PLUGGABLE_CLASS(n,u) wxDECLARE_USER_EXPORTED_PLUGGABLE_CLASS(n,u);
#define DECLARE_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(n,u) wxDECLARE_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(n,u);
// ----------------------------------------------------------------------------
// wxRefCounter: ref counted data "manager"
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_BASE wxRefCounter
{
public:
wxRefCounter() { m_count = 1; }
int GetRefCount() const { return m_count; }
void IncRef() { m_count++; }
void DecRef();
protected:
// this object should never be destroyed directly but only as a
// result of a DecRef() call:
virtual ~wxRefCounter() = default;
private:
// our refcount:
int m_count;
// It doesn't make sense to copy the reference counted objects, a new ref
// counter should be created for a new object instead and compilation
// errors in the code using wxRefCounter due to the lack of copy ctor often
// indicate a problem, e.g. a forgotten copy ctor implementation somewhere.
wxDECLARE_NO_COPY_CLASS(wxRefCounter);
};
// ----------------------------------------------------------------------------
// wxObjectRefData: ref counted data meant to be stored in wxObject
// ----------------------------------------------------------------------------
typedef wxRefCounter wxObjectRefData;
// ----------------------------------------------------------------------------
// wxObjectDataPtr: helper class to avoid memleaks because of missing calls
// to wxObjectRefData::DecRef
// ----------------------------------------------------------------------------
template <class T>
class wxObjectDataPtr
{
public:
typedef T element_type;
explicit wxObjectDataPtr(T *ptr = nullptr) : m_ptr(ptr) {}
// copy ctor
wxObjectDataPtr(const wxObjectDataPtr<T> &tocopy)
: m_ptr(tocopy.m_ptr)
{
if (m_ptr)
m_ptr->IncRef();
}
// generalized copy ctor: U must be convertible to T
template <typename U>
wxObjectDataPtr(const wxObjectDataPtr<U> &tocopy)
: m_ptr(tocopy.get())
{
if (m_ptr)
m_ptr->IncRef();
}
~wxObjectDataPtr()
{
if (m_ptr)
m_ptr->DecRef();
}
T *get() const { return m_ptr; }
bool operator==(const wxObjectDataPtr<T>& other) const
{
return m_ptr == other.m_ptr;
}
bool operator!=(const wxObjectDataPtr<T>& other) const
{
return !(*this == other);
}
// test for pointer validity: defining conversion to unspecified_bool_type
// and not more obvious bool to avoid implicit conversions to integer types
typedef T *(wxObjectDataPtr<T>::*unspecified_bool_type)() const;
operator unspecified_bool_type() const
{
return m_ptr ? &wxObjectDataPtr<T>::get : nullptr;
}
T& operator*() const
{
wxASSERT(m_ptr != nullptr);
return *(m_ptr);
}
T *operator->() const
{
wxASSERT(m_ptr != nullptr);
return get();
}
void reset(T *ptr)
{
if (m_ptr)
m_ptr->DecRef();
m_ptr = ptr;
}
T* release()
{
T* const ptr = m_ptr;
m_ptr = nullptr;
return ptr;
}
wxObjectDataPtr& operator=(const wxObjectDataPtr &tocopy)
{
// Take care to increment the reference first to ensure correct
// behaviour in case of self-assignment.
T* const ptr = tocopy.m_ptr;
if (ptr)
ptr->IncRef();
if (m_ptr)
m_ptr->DecRef();
m_ptr = ptr;
return *this;
}
template <typename U>
wxObjectDataPtr& operator=(const wxObjectDataPtr<U> &tocopy)
{
T* const ptr = tocopy.get();
if (ptr)
ptr->IncRef();
if (m_ptr)
m_ptr->DecRef();
m_ptr = ptr;
return *this;
}
wxObjectDataPtr& operator=(T *ptr)
{
if (m_ptr)
m_ptr->DecRef();
m_ptr = ptr;
return *this;
}
private:
T *m_ptr;
};
// ----------------------------------------------------------------------------
// wxObject: the root class of wxWidgets object hierarchy
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_BASE wxObject
{
#if wxUSE_EXTENDED_RTTI
wxDECLARE_DYNAMIC_CLASS(wxObject);
#endif
public:
wxObject() { m_refData = nullptr; }
virtual ~wxObject() { UnRef(); }
wxObject(const wxObject& other)
{
m_refData = other.m_refData;
if (m_refData)
m_refData->IncRef();
}
wxObject& operator=(const wxObject& other)
{
if ( this != &other )
{
Ref(other);
}
return *this;
}
bool IsKindOf(const wxClassInfo *info) const;
// Turn on the correct set of new and delete operators
#ifdef _WX_WANT_NEW_SIZET_WXCHAR_INT
void *operator new ( size_t size, const wxChar *fileName = nullptr, int lineNum = 0 );
#endif
#ifdef _WX_WANT_DELETE_VOID
void operator delete ( void * buf );
#endif
#ifdef _WX_WANT_DELETE_VOID_WXCHAR_INT
void operator delete ( void *buf, const wxChar*, int );
#endif
#ifdef _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT
void *operator new[] ( size_t size, const wxChar *fileName = nullptr, int lineNum = 0 );
#endif
#ifdef _WX_WANT_ARRAY_DELETE_VOID
void operator delete[] ( void *buf );
#endif
#ifdef _WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT
void operator delete[] (void* buf, const wxChar*, int );
#endif
// ref counted data handling methods
// get/set
wxObjectRefData *GetRefData() const { return m_refData; }
void SetRefData(wxObjectRefData *data) { m_refData = data; }
// make a 'clone' of the object
void Ref(const wxObject& clone);
// destroy a reference
void UnRef();
// Make sure this object has only one reference
void UnShare() { AllocExclusive(); }
// check if this object references the same data as the other one
bool IsSameAs(const wxObject& o) const { return m_refData == o.m_refData; }
#if !wxUSE_EXTENDED_RTTI
virtual wxClassInfo* GetClassInfo() const;
// RTTI information, usually declared by wxDECLARE_DYNAMIC_CLASS() or
// similar, but done manually for the hierarchy root. Note that it's public
// for compatibility reasons, but shouldn't be accessed directly.
static wxClassInfo ms_classInfo;
#endif
protected:
// ensure that our data is not shared with anybody else: if we have no
// data, it is created using CreateRefData() below, if we have shared data
// it is copied using CloneRefData(), otherwise nothing is done
void AllocExclusive();
// both methods must be implemented if AllocExclusive() is used, not pure
// virtual only because of the backwards compatibility reasons
// create a new m_refData
virtual wxObjectRefData *CreateRefData() const;
// create a new m_refData initialized with the given one
wxNODISCARD virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const;
wxObjectRefData *m_refData;
};
inline wxObject *wxCheckDynamicCast(wxObject *obj, wxClassInfo *classInfo)
{
return obj && obj->GetClassInfo()->IsKindOf(classInfo) ? obj : nullptr;
}
#include "wx/xti2.h"
// ----------------------------------------------------------------------------
// Compatibility macro aliases IMPLEMENT group
// ----------------------------------------------------------------------------
// deprecated variants _not_ requiring a semicolon after them and without wx prefix.
// (note that also some wx-prefixed macro do _not_ require a semicolon because
// it's not always possible to force the compiler to require it)
#define IMPLEMENT_DYNAMIC_CLASS(n,b) wxIMPLEMENT_DYNAMIC_CLASS(n,b)
#define IMPLEMENT_DYNAMIC_CLASS2(n,b1,b2) wxIMPLEMENT_DYNAMIC_CLASS2(n,b1,b2)
#define IMPLEMENT_ABSTRACT_CLASS(n,b) wxIMPLEMENT_ABSTRACT_CLASS(n,b)
#define IMPLEMENT_ABSTRACT_CLASS2(n,b1,b2) wxIMPLEMENT_ABSTRACT_CLASS2(n,b1,b2)
#define IMPLEMENT_CLASS(n,b) wxIMPLEMENT_CLASS(n,b)
#define IMPLEMENT_CLASS2(n,b1,b2) wxIMPLEMENT_CLASS2(n,b1,b2)
#define IMPLEMENT_PLUGGABLE_CLASS(n,b) wxIMPLEMENT_PLUGGABLE_CLASS(n,b)
#define IMPLEMENT_PLUGGABLE_CLASS2(n,b,b2) wxIMPLEMENT_PLUGGABLE_CLASS2(n,b,b2)
#define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(n,b) wxIMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(n,b)
#define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(n,b,b2) wxIMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(n,b,b2)
#define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS(n,b) wxIMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS(n,b)
#define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS2(n,b,b2) wxIMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS2(n,b,b2)
#define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(n,b) wxIMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(n,b)
#define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS2(n,b,b2) wxIMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS2(n,b,b2)
#define CLASSINFO(n) wxCLASSINFO(n)
#endif // _WX_OBJECTH__
