55ccdb93e4
1. perform deep comparison for the classes for which it makes sense in the ports where this wasn't done yet 2. remove (shallow) comparison operators for the classes for which it does not make sense (such as wxBitmap) 3. makes wxBitmap use COW on all ports 4. adds wxObject::IsRefTo() 5. centralizes and improves COW docs git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@42752 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
567 lines
20 KiB
C++
567 lines
20 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/object.h
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// Purpose: wxObject class, plus run-time type information macros
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// Author: Julian Smart
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// Modified by: Ron Lee
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// Created: 01/02/97
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// RCS-ID: $Id$
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// Copyright: (c) 1997 Julian Smart
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// (c) 2001 Ron Lee <ron@debian.org>
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_OBJECTH__
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#define _WX_OBJECTH__
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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#include "wx/memory.h"
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class WXDLLIMPEXP_BASE wxObject;
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#ifndef wxUSE_EXTENDED_RTTI
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#define wxUSE_EXTENDED_RTTI 0
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#endif
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#if wxUSE_EXTENDED_RTTI
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#include "wx/xti.h"
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#else
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// ----------------------------------------------------------------------------
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// conditional compilation
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxClassInfo;
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class WXDLLIMPEXP_BASE wxHashTable;
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class WXDLLIMPEXP_BASE wxObjectRefData;
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// ----------------------------------------------------------------------------
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// wxClassInfo
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// ----------------------------------------------------------------------------
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typedef wxObject *(*wxObjectConstructorFn)(void);
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class WXDLLIMPEXP_BASE wxClassInfo
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{
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public:
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wxClassInfo( const wxChar *className,
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const wxClassInfo *baseInfo1,
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const wxClassInfo *baseInfo2,
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int size,
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wxObjectConstructorFn ctor )
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: m_className(className)
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, m_objectSize(size)
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, m_objectConstructor(ctor)
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, m_baseInfo1(baseInfo1)
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, m_baseInfo2(baseInfo2)
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, m_next(sm_first)
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{
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sm_first = this;
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Register();
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}
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~wxClassInfo();
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wxObject *CreateObject() const { return m_objectConstructor ? (*m_objectConstructor)() : 0; }
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bool IsDynamic() const { return (NULL != m_objectConstructor); }
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const wxChar *GetClassName() const { return m_className; }
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const wxChar *GetBaseClassName1() const
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{ return m_baseInfo1 ? m_baseInfo1->GetClassName() : NULL; }
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const wxChar *GetBaseClassName2() const
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{ return m_baseInfo2 ? m_baseInfo2->GetClassName() : NULL; }
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const wxClassInfo *GetBaseClass1() const { return m_baseInfo1; }
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const wxClassInfo *GetBaseClass2() const { return m_baseInfo2; }
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int GetSize() const { return m_objectSize; }
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wxObjectConstructorFn GetConstructor() const { return m_objectConstructor; }
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static const wxClassInfo *GetFirst() { return sm_first; }
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const wxClassInfo *GetNext() const { return m_next; }
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static wxClassInfo *FindClass(const wxChar *className);
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// Climb upwards through inheritance hierarchy.
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// Dual inheritance is catered for.
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bool IsKindOf(const wxClassInfo *info) const
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{
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return info != 0 &&
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( info == this ||
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( m_baseInfo1 && m_baseInfo1->IsKindOf(info) ) ||
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( m_baseInfo2 && m_baseInfo2->IsKindOf(info) ) );
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}
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#if WXWIN_COMPATIBILITY_2_4
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// Initializes parent pointers and hash table for fast searching.
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wxDEPRECATED( static void InitializeClasses() );
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// Cleans up hash table used for fast searching.
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wxDEPRECATED( static void CleanUpClasses() );
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#endif
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public:
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const wxChar *m_className;
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int m_objectSize;
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wxObjectConstructorFn m_objectConstructor;
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// Pointers to base wxClassInfos: set in InitializeClasses
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const wxClassInfo *m_baseInfo1;
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const wxClassInfo *m_baseInfo2;
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// class info object live in a linked list:
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// pointers to its head and the next element in it
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static wxClassInfo *sm_first;
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wxClassInfo *m_next;
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// FIXME: this should be private (currently used directly by way too
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// many clients)
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static wxHashTable *sm_classTable;
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private:
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// InitializeClasses() helper
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static wxClassInfo *GetBaseByName(const wxChar *name);
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DECLARE_NO_COPY_CLASS(wxClassInfo)
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protected:
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// registers the class
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void Register();
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void Unregister();
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};
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WXDLLIMPEXP_BASE wxObject *wxCreateDynamicObject(const wxChar *name);
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#if WXWIN_COMPATIBILITY_2_4
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inline void wxClassInfo::InitializeClasses() {}
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inline void wxClassInfo::CleanUpClasses() {}
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#endif
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// ----------------------------------------------------------------------------
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// Dynamic class macros
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// ----------------------------------------------------------------------------
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#define DECLARE_ABSTRACT_CLASS(name) \
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public: \
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static wxClassInfo ms_classInfo; \
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virtual wxClassInfo *GetClassInfo() const;
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#define DECLARE_DYNAMIC_CLASS_NO_ASSIGN(name) \
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DECLARE_NO_ASSIGN_CLASS(name) \
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DECLARE_DYNAMIC_CLASS(name)
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#define DECLARE_DYNAMIC_CLASS_NO_COPY(name) \
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DECLARE_NO_COPY_CLASS(name) \
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DECLARE_DYNAMIC_CLASS(name)
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#define DECLARE_DYNAMIC_CLASS(name) \
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DECLARE_ABSTRACT_CLASS(name) \
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static wxObject* wxCreateObject();
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#define DECLARE_CLASS(name) DECLARE_DYNAMIC_CLASS(name)
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// common part of the macros below
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#define wxIMPLEMENT_CLASS_COMMON(name, basename, baseclsinfo2, func) \
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wxClassInfo name::ms_classInfo(wxT(#name), \
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&basename::ms_classInfo, \
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baseclsinfo2, \
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(int) sizeof(name), \
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(wxObjectConstructorFn) func); \
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\
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wxClassInfo *name::GetClassInfo() const \
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{ return &name::ms_classInfo; }
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#define wxIMPLEMENT_CLASS_COMMON1(name, basename, func) \
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wxIMPLEMENT_CLASS_COMMON(name, basename, NULL, func)
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#define wxIMPLEMENT_CLASS_COMMON2(name, basename1, basename2, func) \
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wxIMPLEMENT_CLASS_COMMON(name, basename1, &basename2::ms_classInfo, func)
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// -----------------------------------
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// for concrete classes
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// -----------------------------------
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// Single inheritance with one base class
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#define IMPLEMENT_DYNAMIC_CLASS(name, basename) \
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wxIMPLEMENT_CLASS_COMMON1(name, basename, name::wxCreateObject) \
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wxObject* name::wxCreateObject() \
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{ return new name; }
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// Multiple inheritance with two base classes
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#define IMPLEMENT_DYNAMIC_CLASS2(name, basename1, basename2) \
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wxIMPLEMENT_CLASS_COMMON2(name, basename1, basename2, \
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name::wxCreateObject) \
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wxObject* name::wxCreateObject() \
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{ return new name; }
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// -----------------------------------
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// for abstract classes
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// -----------------------------------
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// Single inheritance with one base class
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#define IMPLEMENT_ABSTRACT_CLASS(name, basename) \
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wxIMPLEMENT_CLASS_COMMON1(name, basename, NULL)
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// Multiple inheritance with two base classes
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#define IMPLEMENT_ABSTRACT_CLASS2(name, basename1, basename2) \
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wxIMPLEMENT_CLASS_COMMON2(name, basename1, basename2, NULL)
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#define IMPLEMENT_CLASS IMPLEMENT_ABSTRACT_CLASS
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#define IMPLEMENT_CLASS2 IMPLEMENT_ABSTRACT_CLASS2
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#endif // !wxUSE_EXTENDED_RTTI
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// -----------------------------------
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// for pluggable classes
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// -----------------------------------
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// NOTE: this should probably be the very first statement
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// in the class declaration so wxPluginSentinel is
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// the first member initialised and the last destroyed.
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// _DECLARE_DL_SENTINEL(name) wxPluginSentinel m_pluginsentinel;
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#if wxUSE_NESTED_CLASSES
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#define _DECLARE_DL_SENTINEL(name, exportdecl) \
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class exportdecl name##PluginSentinel { \
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private: \
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static const wxString sm_className; \
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public: \
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name##PluginSentinel(); \
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~name##PluginSentinel(); \
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}; \
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name##PluginSentinel m_pluginsentinel;
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#define _IMPLEMENT_DL_SENTINEL(name) \
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const wxString name::name##PluginSentinel::sm_className(#name); \
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name::name##PluginSentinel::name##PluginSentinel() { \
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wxPluginLibrary *e = (wxPluginLibrary*) wxPluginLibrary::ms_classes.Get(#name); \
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if( e != 0 ) { e->RefObj(); } \
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} \
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name::name##PluginSentinel::~name##PluginSentinel() { \
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wxPluginLibrary *e = (wxPluginLibrary*) wxPluginLibrary::ms_classes.Get(#name); \
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if( e != 0 ) { e->UnrefObj(); } \
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}
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#else
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#define _DECLARE_DL_SENTINEL(name)
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#define _IMPLEMENT_DL_SENTINEL(name)
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#endif // wxUSE_NESTED_CLASSES
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#define DECLARE_PLUGGABLE_CLASS(name) \
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DECLARE_DYNAMIC_CLASS(name) _DECLARE_DL_SENTINEL(name, WXDLLEXPORT)
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#define DECLARE_ABSTRACT_PLUGGABLE_CLASS(name) \
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DECLARE_ABSTRACT_CLASS(name) _DECLARE_DL_SENTINEL(name, WXDLLEXPORT)
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#define DECLARE_USER_EXPORTED_PLUGGABLE_CLASS(name, usergoo) \
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DECLARE_DYNAMIC_CLASS(name) _DECLARE_DL_SENTINEL(name, usergoo)
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#define DECLARE_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, usergoo) \
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DECLARE_ABSTRACT_CLASS(name) _DECLARE_DL_SENTINEL(name, usergoo)
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#define IMPLEMENT_PLUGGABLE_CLASS(name, basename) \
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IMPLEMENT_DYNAMIC_CLASS(name, basename) _IMPLEMENT_DL_SENTINEL(name)
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#define IMPLEMENT_PLUGGABLE_CLASS2(name, basename1, basename2) \
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IMPLEMENT_DYNAMIC_CLASS2(name, basename1, basename2) _IMPLEMENT_DL_SENTINEL(name)
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#define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(name, basename) \
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IMPLEMENT_ABSTRACT_CLASS(name, basename) _IMPLEMENT_DL_SENTINEL(name)
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#define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2) \
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IMPLEMENT_ABSTRACT_CLASS2(name, basename1, basename2) _IMPLEMENT_DL_SENTINEL(name)
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#define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS(name, basename) \
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IMPLEMENT_PLUGGABLE_CLASS(name, basename)
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#define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS2(name, basename1, basename2) \
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IMPLEMENT_PLUGGABLE_CLASS2(name, basename1, basename2)
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#define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, basename) \
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IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(name, basename)
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#define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2) \
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IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2)
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#define CLASSINFO(name) (&name::ms_classInfo)
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#define wxIS_KIND_OF(obj, className) obj->IsKindOf(&className::ms_classInfo)
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// Just seems a bit nicer-looking (pretend it's not a macro)
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#define wxIsKindOf(obj, className) obj->IsKindOf(&className::ms_classInfo)
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// this cast does some more checks at compile time as it uses static_cast
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// internally
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//
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// note that it still has different semantics from dynamic_cast<> and so can't
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// be replaced by it as long as there are any compilers not supporting it
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#define wxDynamicCast(obj, className) \
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((className *) wxCheckDynamicCast( \
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wx_const_cast(wxObject *, wx_static_cast(const wxObject *, \
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wx_const_cast(className *, wx_static_cast(const className *, obj)))), \
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&className::ms_classInfo))
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// The 'this' pointer is always true, so use this version
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// to cast the this pointer and avoid compiler warnings.
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#define wxDynamicCastThis(className) \
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(IsKindOf(&className::ms_classInfo) ? (className *)(this) : (className *)0)
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#ifdef __WXDEBUG__
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inline void* wxCheckCast(void *ptr)
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{
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wxASSERT_MSG( ptr, _T("wxStaticCast() used incorrectly") );
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return ptr;
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}
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#define wxStaticCast(obj, className) \
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((className *)wxCheckCast(wxDynamicCast(obj, className)))
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#else // !__WXDEBUG__
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#define wxStaticCast(obj, className) \
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wx_const_cast(className *, wx_static_cast(const className *, obj))
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#endif // __WXDEBUG__
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// ----------------------------------------------------------------------------
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// set up memory debugging macros
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// ----------------------------------------------------------------------------
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/*
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Which new/delete operator variants do we want?
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_WX_WANT_NEW_SIZET_WXCHAR_INT = void *operator new (size_t size, wxChar *fileName = 0, int lineNum = 0)
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_WX_WANT_DELETE_VOID = void operator delete (void * buf)
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_WX_WANT_DELETE_VOID_CONSTCHAR_SIZET = void operator delete (void *buf, const char *_fname, size_t _line)
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_WX_WANT_DELETE_VOID_WXCHAR_INT = void operator delete(void *buf, wxChar*, int)
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_WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT = void *operator new[] (size_t size, wxChar *fileName , int lineNum = 0)
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_WX_WANT_ARRAY_DELETE_VOID = void operator delete[] (void *buf)
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_WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT = void operator delete[] (void* buf, wxChar*, int )
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*/
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#if defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING
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// All compilers get this one
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#define _WX_WANT_NEW_SIZET_WXCHAR_INT
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// Everyone except Visage gets the next one
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#ifndef __VISAGECPP__
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#define _WX_WANT_DELETE_VOID
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#endif
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// Only visage gets this one under the correct circumstances
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#if defined(__VISAGECPP__) && __DEBUG_ALLOC__
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#define _WX_WANT_DELETE_VOID_CONSTCHAR_SIZET
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#endif
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// Only VC++ 6.0 and CodeWarrior compilers get overloaded delete that matches new
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#if ( defined(__VISUALC__) && (__VISUALC__ >= 1200) ) || (defined(__MWERKS__) && (__MWERKS__ >= 0x2400))
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#define _WX_WANT_DELETE_VOID_WXCHAR_INT
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#endif
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// Now see who (if anyone) gets the array memory operators
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#if wxUSE_ARRAY_MEMORY_OPERATORS
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// Everyone except Visual C++ (cause problems for VC++ - crashes)
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#if !defined(__VISUALC__)
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#define _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT
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#endif
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// Everyone except Visual C++ (cause problems for VC++ - crashes)
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#if !defined(__VISUALC__)
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#define _WX_WANT_ARRAY_DELETE_VOID
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#endif
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// Only CodeWarrior 6 or higher
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#if defined(__MWERKS__) && (__MWERKS__ >= 0x2400)
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#define _WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT
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#endif
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#endif // wxUSE_ARRAY_MEMORY_OPERATORS
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#endif // __WXDEBUG__ && wxUSE_MEMORY_TRACING
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// ----------------------------------------------------------------------------
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// wxObjectRefData: ref counted data meant to be stored in wxObject
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxObjectRefData
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{
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friend class WXDLLIMPEXP_BASE wxObject;
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public:
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wxObjectRefData() : m_count(1) { }
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virtual ~wxObjectRefData() { }
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int GetRefCount() const { return m_count; }
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private:
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int m_count;
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};
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// ----------------------------------------------------------------------------
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// wxObject: the root class of wxWidgets object hierarchy
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxObject
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{
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DECLARE_ABSTRACT_CLASS(wxObject)
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public:
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wxObject() { m_refData = NULL; }
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virtual ~wxObject() { UnRef(); }
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wxObject(const wxObject& other)
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{
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m_refData = other.m_refData;
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if (m_refData)
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m_refData->m_count++;
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}
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wxObject& operator=(const wxObject& other)
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{
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if ( this != &other )
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{
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Ref(other);
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}
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return *this;
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}
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bool IsKindOf(wxClassInfo *info) const;
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// Turn on the correct set of new and delete operators
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#ifdef _WX_WANT_NEW_SIZET_WXCHAR_INT
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void *operator new ( size_t size, const wxChar *fileName = NULL, int lineNum = 0 );
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#endif
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#ifdef _WX_WANT_DELETE_VOID
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void operator delete ( void * buf );
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#endif
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#ifdef _WX_WANT_DELETE_VOID_CONSTCHAR_SIZET
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void operator delete ( void *buf, const char *_fname, size_t _line );
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#endif
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#ifdef _WX_WANT_DELETE_VOID_WXCHAR_INT
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void operator delete ( void *buf, const wxChar*, int );
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#endif
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#ifdef _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT
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void *operator new[] ( size_t size, const wxChar *fileName = NULL, int lineNum = 0 );
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#endif
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#ifdef _WX_WANT_ARRAY_DELETE_VOID
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void operator delete[] ( void *buf );
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#endif
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#ifdef _WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT
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void operator delete[] (void* buf, const wxChar*, int );
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#endif
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// ref counted data handling methods
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// get/set
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wxObjectRefData *GetRefData() const { return m_refData; }
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void SetRefData(wxObjectRefData *data) { m_refData = data; }
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// make a 'clone' of the object
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void Ref(const wxObject& clone);
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// destroy a reference
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void UnRef();
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// Make sure this object has only one reference
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void UnShare() { AllocExclusive(); }
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// Do a shallow comparison of our referenced data with the given object's refdata
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bool IsRefTo(const wxObject *p) const { return m_refData == p->m_refData; }
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protected:
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// ensure that our data is not shared with anybody else: if we have no
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// data, it is created using CreateRefData() below, if we have shared data
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// 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
|
|
virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const;
|
|
|
|
wxObjectRefData *m_refData;
|
|
};
|
|
|
|
inline wxObject *wxCheckDynamicCast(wxObject *obj, wxClassInfo *classInfo)
|
|
{
|
|
return obj && obj->GetClassInfo()->IsKindOf(classInfo) ? obj : NULL;
|
|
}
|
|
|
|
#if wxUSE_EXTENDED_RTTI
|
|
class WXDLLIMPEXP_BASE wxDynamicObject : public wxObject
|
|
{
|
|
friend class WXDLLIMPEXP_BASE wxDynamicClassInfo ;
|
|
public:
|
|
// instantiates this object with an instance of its superclass
|
|
wxDynamicObject(wxObject* superClassInstance, const wxDynamicClassInfo *info) ;
|
|
virtual ~wxDynamicObject();
|
|
|
|
void SetProperty (const wxChar *propertyName, const wxxVariant &value);
|
|
wxxVariant GetProperty (const wxChar *propertyName) const ;
|
|
|
|
// get the runtime identity of this object
|
|
wxClassInfo *GetClassInfo() const
|
|
{
|
|
#ifdef _MSC_VER
|
|
return (wxClassInfo*) m_classInfo;
|
|
#else
|
|
return wx_const_cast(wxClassInfo *, m_classInfo);
|
|
#endif
|
|
}
|
|
|
|
wxObject* GetSuperClassInstance() const
|
|
{
|
|
return m_superClassInstance ;
|
|
}
|
|
private :
|
|
// removes an existing runtime-property
|
|
void RemoveProperty( const wxChar *propertyName ) ;
|
|
|
|
// renames an existing runtime-property
|
|
void RenameProperty( const wxChar *oldPropertyName , const wxChar *newPropertyName ) ;
|
|
|
|
wxObject *m_superClassInstance ;
|
|
const wxDynamicClassInfo *m_classInfo;
|
|
struct wxDynamicObjectInternal;
|
|
wxDynamicObjectInternal *m_data;
|
|
};
|
|
#endif
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// more debugging macros
|
|
// ----------------------------------------------------------------------------
|
|
|
|
// Redefine new to be the debugging version. This doesn't work with all
|
|
// compilers, in which case you need to use WXDEBUG_NEW explicitly if you wish
|
|
// to use the debugging version.
|
|
|
|
#ifdef __WXDEBUG__
|
|
#define WXDEBUG_NEW new(__TFILE__,__LINE__)
|
|
|
|
#if wxUSE_DEBUG_NEW_ALWAYS
|
|
#if wxUSE_GLOBAL_MEMORY_OPERATORS
|
|
#define new WXDEBUG_NEW
|
|
#elif defined(__VISUALC__)
|
|
// Including this file redefines new and allows leak reports to
|
|
// contain line numbers
|
|
#include "wx/msw/msvcrt.h"
|
|
#endif
|
|
#endif // wxUSE_DEBUG_NEW_ALWAYS
|
|
#else // !__WXDEBUG__
|
|
#define WXDEBUG_NEW new
|
|
#endif // __WXDEBUG__/!__WXDEBUG__
|
|
|
|
#endif // _WX_OBJECTH__
|