3f66f6a5b3
This keyword is not expanded by Git which means it's not replaced with the correct revision value in the releases made using git-based scripts and it's confusing to have lines with unexpanded "$Id$" in the released files. As expanding them with Git is not that simple (it could be done with git archive and export-subst attribute) and there are not many benefits in having them in the first place, just remove all these lines. If nothing else, this will make an eventual transition to Git simpler. Closes #14487. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74602 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
583 lines
20 KiB
C++
583 lines
20 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/variant.h
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// Purpose: wxVariant class, container for any type
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// Author: Julian Smart
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// Modified by:
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// Created: 10/09/98
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// Copyright: (c) Julian Smart
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_VARIANT_H_
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#define _WX_VARIANT_H_
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#include "wx/defs.h"
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#if wxUSE_VARIANT
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#include "wx/object.h"
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#include "wx/string.h"
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#include "wx/arrstr.h"
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#include "wx/list.h"
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#include "wx/cpp.h"
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#include "wx/longlong.h"
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#if wxUSE_DATETIME
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#include "wx/datetime.h"
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#endif // wxUSE_DATETIME
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#include "wx/iosfwrap.h"
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class wxAny;
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/*
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* wxVariantData stores the actual data in a wxVariant object,
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* to allow it to store any type of data.
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* Derive from this to provide custom data handling.
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*
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* NB: When you construct a wxVariantData, it will have refcount
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* of one. Refcount will not be further increased when
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* it is passed to wxVariant. This simulates old common
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* scenario where wxVariant took ownership of wxVariantData
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* passed to it.
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* If you create wxVariantData for other reasons than passing
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* it to wxVariant, technically you are not required to call
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* DecRef() before deleting it.
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*
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* TODO: in order to replace wxPropertyValue, we would need
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* to consider adding constructors that take pointers to C++ variables,
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* or removing that functionality from the wxProperty library.
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* Essentially wxPropertyValue takes on some of the wxValidator functionality
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* by storing pointers and not just actual values, allowing update of C++ data
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* to be handled automatically. Perhaps there's another way of doing this without
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* overloading wxVariant with unnecessary functionality.
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*/
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class WXDLLIMPEXP_BASE wxVariantData : public wxObjectRefData
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{
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friend class wxVariant;
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public:
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wxVariantData() { }
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// Override these to provide common functionality
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virtual bool Eq(wxVariantData& data) const = 0;
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#if wxUSE_STD_IOSTREAM
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virtual bool Write(wxSTD ostream& WXUNUSED(str)) const { return false; }
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#endif
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virtual bool Write(wxString& WXUNUSED(str)) const { return false; }
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#if wxUSE_STD_IOSTREAM
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virtual bool Read(wxSTD istream& WXUNUSED(str)) { return false; }
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#endif
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virtual bool Read(wxString& WXUNUSED(str)) { return false; }
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// What type is it? Return a string name.
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virtual wxString GetType() const = 0;
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// If it based on wxObject return the ClassInfo.
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virtual wxClassInfo* GetValueClassInfo() { return NULL; }
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// Implement this to make wxVariant::UnShare work. Returns
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// a copy of the data.
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virtual wxVariantData* Clone() const { return NULL; }
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#if wxUSE_ANY
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// Converts value to wxAny, if possible. Return true if successful.
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virtual bool GetAsAny(wxAny* WXUNUSED(any)) const { return false; }
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#endif
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protected:
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// Protected dtor should make some incompatible code
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// break more louder. That is, they should do data->DecRef()
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// instead of delete data.
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virtual ~wxVariantData() { }
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};
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/*
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* wxVariant can store any kind of data, but has some basic types
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* built in.
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*/
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class WXDLLIMPEXP_FWD_BASE wxVariant;
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WX_DECLARE_LIST_WITH_DECL(wxVariant, wxVariantList, class WXDLLIMPEXP_BASE);
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class WXDLLIMPEXP_BASE wxVariant: public wxObject
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{
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public:
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wxVariant();
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wxVariant(const wxVariant& variant);
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wxVariant(wxVariantData* data, const wxString& name = wxEmptyString);
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#if wxUSE_ANY
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wxVariant(const wxAny& any);
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#endif
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virtual ~wxVariant();
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// generic assignment
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void operator= (const wxVariant& variant);
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// Assignment using data, e.g.
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// myVariant = new wxStringVariantData("hello");
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void operator= (wxVariantData* variantData);
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bool operator== (const wxVariant& variant) const;
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bool operator!= (const wxVariant& variant) const;
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// Sets/gets name
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inline void SetName(const wxString& name) { m_name = name; }
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inline const wxString& GetName() const { return m_name; }
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// Tests whether there is data
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bool IsNull() const;
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// For compatibility with wxWidgets <= 2.6, this doesn't increase
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// reference count.
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wxVariantData* GetData() const
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{
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return (wxVariantData*) m_refData;
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}
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void SetData(wxVariantData* data) ;
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// make a 'clone' of the object
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void Ref(const wxVariant& clone) { wxObject::Ref(clone); }
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// ensure that the data is exclusive to this variant, and not shared
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bool Unshare();
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// Make NULL (i.e. delete the data)
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void MakeNull();
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// Delete data and name
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void Clear();
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// Returns a string representing the type of the variant,
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// e.g. "string", "bool", "stringlist", "list", "double", "long"
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wxString GetType() const;
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bool IsType(const wxString& type) const;
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bool IsValueKindOf(const wxClassInfo* type) const;
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// write contents to a string (e.g. for debugging)
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wxString MakeString() const;
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#if wxUSE_ANY
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wxAny GetAny() const;
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#endif
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// double
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wxVariant(double val, const wxString& name = wxEmptyString);
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bool operator== (double value) const;
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bool operator!= (double value) const;
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void operator= (double value) ;
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inline operator double () const { return GetDouble(); }
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inline double GetReal() const { return GetDouble(); }
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double GetDouble() const;
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// long
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wxVariant(long val, const wxString& name = wxEmptyString);
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wxVariant(int val, const wxString& name = wxEmptyString);
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wxVariant(short val, const wxString& name = wxEmptyString);
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bool operator== (long value) const;
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bool operator!= (long value) const;
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void operator= (long value) ;
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inline operator long () const { return GetLong(); }
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inline long GetInteger() const { return GetLong(); }
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long GetLong() const;
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// bool
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wxVariant(bool val, const wxString& name = wxEmptyString);
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bool operator== (bool value) const;
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bool operator!= (bool value) const;
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void operator= (bool value) ;
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inline operator bool () const { return GetBool(); }
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bool GetBool() const ;
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// wxDateTime
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#if wxUSE_DATETIME
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wxVariant(const wxDateTime& val, const wxString& name = wxEmptyString);
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bool operator== (const wxDateTime& value) const;
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bool operator!= (const wxDateTime& value) const;
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void operator= (const wxDateTime& value) ;
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inline operator wxDateTime () const { return GetDateTime(); }
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wxDateTime GetDateTime() const;
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#endif
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// wxString
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wxVariant(const wxString& val, const wxString& name = wxEmptyString);
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// these overloads are necessary to prevent the compiler from using bool
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// version instead of wxString one:
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wxVariant(const char* val, const wxString& name = wxEmptyString);
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wxVariant(const wchar_t* val, const wxString& name = wxEmptyString);
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wxVariant(const wxCStrData& val, const wxString& name = wxEmptyString);
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wxVariant(const wxScopedCharBuffer& val, const wxString& name = wxEmptyString);
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wxVariant(const wxScopedWCharBuffer& val, const wxString& name = wxEmptyString);
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bool operator== (const wxString& value) const;
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bool operator!= (const wxString& value) const;
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wxVariant& operator=(const wxString& value);
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// these overloads are necessary to prevent the compiler from using bool
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// version instead of wxString one:
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wxVariant& operator=(const char* value)
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{ return *this = wxString(value); }
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wxVariant& operator=(const wchar_t* value)
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{ return *this = wxString(value); }
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wxVariant& operator=(const wxCStrData& value)
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{ return *this = value.AsString(); }
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template<typename T>
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wxVariant& operator=(const wxScopedCharTypeBuffer<T>& value)
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{ return *this = value.data(); }
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inline operator wxString () const { return MakeString(); }
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wxString GetString() const;
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#if wxUSE_STD_STRING
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wxVariant(const std::string& val, const wxString& name = wxEmptyString);
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bool operator==(const std::string& value) const
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{ return operator==(wxString(value)); }
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bool operator!=(const std::string& value) const
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{ return operator!=(wxString(value)); }
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wxVariant& operator=(const std::string& value)
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{ return operator=(wxString(value)); }
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operator std::string() const { return (operator wxString()).ToStdString(); }
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wxVariant(const wxStdWideString& val, const wxString& name = wxEmptyString);
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bool operator==(const wxStdWideString& value) const
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{ return operator==(wxString(value)); }
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bool operator!=(const wxStdWideString& value) const
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{ return operator!=(wxString(value)); }
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wxVariant& operator=(const wxStdWideString& value)
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{ return operator=(wxString(value)); }
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operator wxStdWideString() const { return (operator wxString()).ToStdWstring(); }
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#endif // wxUSE_STD_STRING
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// wxUniChar
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wxVariant(const wxUniChar& val, const wxString& name = wxEmptyString);
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wxVariant(const wxUniCharRef& val, const wxString& name = wxEmptyString);
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wxVariant(char val, const wxString& name = wxEmptyString);
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wxVariant(wchar_t val, const wxString& name = wxEmptyString);
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bool operator==(const wxUniChar& value) const;
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bool operator==(const wxUniCharRef& value) const { return *this == wxUniChar(value); }
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bool operator==(char value) const { return *this == wxUniChar(value); }
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bool operator==(wchar_t value) const { return *this == wxUniChar(value); }
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bool operator!=(const wxUniChar& value) const { return !(*this == value); }
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bool operator!=(const wxUniCharRef& value) const { return !(*this == value); }
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bool operator!=(char value) const { return !(*this == value); }
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bool operator!=(wchar_t value) const { return !(*this == value); }
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wxVariant& operator=(const wxUniChar& value);
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wxVariant& operator=(const wxUniCharRef& value) { return *this = wxUniChar(value); }
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wxVariant& operator=(char value) { return *this = wxUniChar(value); }
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wxVariant& operator=(wchar_t value) { return *this = wxUniChar(value); }
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operator wxUniChar() const { return GetChar(); }
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operator char() const { return GetChar(); }
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operator wchar_t() const { return GetChar(); }
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wxUniChar GetChar() const;
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// wxArrayString
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wxVariant(const wxArrayString& val, const wxString& name = wxEmptyString);
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bool operator== (const wxArrayString& value) const;
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bool operator!= (const wxArrayString& value) const;
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void operator= (const wxArrayString& value);
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operator wxArrayString () const { return GetArrayString(); }
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wxArrayString GetArrayString() const;
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// void*
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wxVariant(void* ptr, const wxString& name = wxEmptyString);
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bool operator== (void* value) const;
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bool operator!= (void* value) const;
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void operator= (void* value);
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operator void* () const { return GetVoidPtr(); }
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void* GetVoidPtr() const;
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// wxObject*
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wxVariant(wxObject* ptr, const wxString& name = wxEmptyString);
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bool operator== (wxObject* value) const;
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bool operator!= (wxObject* value) const;
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void operator= (wxObject* value);
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wxObject* GetWxObjectPtr() const;
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#if wxUSE_LONGLONG
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// wxLongLong
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wxVariant(wxLongLong, const wxString& name = wxEmptyString);
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bool operator==(wxLongLong value) const;
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bool operator!=(wxLongLong value) const;
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void operator=(wxLongLong value);
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operator wxLongLong() const { return GetLongLong(); }
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wxLongLong GetLongLong() const;
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// wxULongLong
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wxVariant(wxULongLong, const wxString& name = wxEmptyString);
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bool operator==(wxULongLong value) const;
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bool operator!=(wxULongLong value) const;
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void operator=(wxULongLong value);
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operator wxULongLong() const { return GetULongLong(); }
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wxULongLong GetULongLong() const;
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#endif
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// ------------------------------
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// list operations
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// ------------------------------
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wxVariant(const wxVariantList& val, const wxString& name = wxEmptyString); // List of variants
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bool operator== (const wxVariantList& value) const;
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bool operator!= (const wxVariantList& value) const;
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void operator= (const wxVariantList& value) ;
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// Treat a list variant as an array
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wxVariant operator[] (size_t idx) const;
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wxVariant& operator[] (size_t idx) ;
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wxVariantList& GetList() const ;
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// Return the number of elements in a list
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size_t GetCount() const;
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// Make empty list
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void NullList();
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// Append to list
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void Append(const wxVariant& value);
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// Insert at front of list
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void Insert(const wxVariant& value);
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// Returns true if the variant is a member of the list
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bool Member(const wxVariant& value) const;
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// Deletes the nth element of the list
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bool Delete(size_t item);
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// Clear list
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void ClearList();
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public:
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// Type conversion
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bool Convert(long* value) const;
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bool Convert(bool* value) const;
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bool Convert(double* value) const;
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bool Convert(wxString* value) const;
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bool Convert(wxUniChar* value) const;
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bool Convert(char* value) const;
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bool Convert(wchar_t* value) const;
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#if wxUSE_DATETIME
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bool Convert(wxDateTime* value) const;
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#endif // wxUSE_DATETIME
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#if wxUSE_LONGLONG
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bool Convert(wxLongLong* value) const;
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bool Convert(wxULongLong* value) const;
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#ifdef wxLongLong_t
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bool Convert(wxLongLong_t* value) const
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{
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wxLongLong temp;
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if ( !Convert(&temp) )
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return false;
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*value = temp.GetValue();
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return true;
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}
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bool Convert(wxULongLong_t* value) const
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{
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wxULongLong temp;
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if ( !Convert(&temp) )
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return false;
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*value = temp.GetValue();
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return true;
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}
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#endif // wxLongLong_t
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#endif // wxUSE_LONGLONG
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// Attributes
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protected:
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virtual wxObjectRefData *CreateRefData() const;
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virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const;
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wxString m_name;
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private:
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DECLARE_DYNAMIC_CLASS(wxVariant)
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};
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//
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// wxVariant <-> wxAny conversion code
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//
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#if wxUSE_ANY
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#include "wx/any.h"
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// In order to convert wxAny to wxVariant, we need to be able to associate
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// wxAnyValueType with a wxVariantData factory function.
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typedef wxVariantData* (*wxVariantDataFactory)(const wxAny& any);
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// Actual Any-to-Variant registration must be postponed to a time when all
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// global variables have been initialized. Hence this arrangement.
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// wxAnyToVariantRegistration instances are kept in global scope and
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// wxAnyValueTypeGlobals in any.cpp will use their data when the time is
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// right.
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class WXDLLIMPEXP_BASE wxAnyToVariantRegistration
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{
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public:
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wxAnyToVariantRegistration(wxVariantDataFactory factory);
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virtual ~wxAnyToVariantRegistration();
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virtual wxAnyValueType* GetAssociatedType() = 0;
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wxVariantDataFactory GetFactory() const { return m_factory; }
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private:
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wxVariantDataFactory m_factory;
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};
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template<typename T>
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class wxAnyToVariantRegistrationImpl : public wxAnyToVariantRegistration
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{
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public:
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wxAnyToVariantRegistrationImpl(wxVariantDataFactory factory)
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: wxAnyToVariantRegistration(factory)
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{
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}
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virtual wxAnyValueType* GetAssociatedType()
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{
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return wxAnyValueTypeImpl<T>::GetInstance();
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}
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private:
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};
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#define DECLARE_WXANY_CONVERSION() \
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virtual bool GetAsAny(wxAny* any) const; \
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static wxVariantData* VariantDataFactory(const wxAny& any);
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#define _REGISTER_WXANY_CONVERSION(T, CLASSNAME, FUNC) \
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static wxAnyToVariantRegistrationImpl<T> \
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gs_##CLASSNAME##AnyToVariantRegistration = \
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wxAnyToVariantRegistrationImpl<T>(&FUNC);
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#define REGISTER_WXANY_CONVERSION(T, CLASSNAME) \
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_REGISTER_WXANY_CONVERSION(T, CLASSNAME, CLASSNAME::VariantDataFactory)
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#define IMPLEMENT_TRIVIAL_WXANY_CONVERSION(T, CLASSNAME) \
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bool CLASSNAME::GetAsAny(wxAny* any) const \
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{ \
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*any = m_value; \
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return true; \
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} \
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wxVariantData* CLASSNAME::VariantDataFactory(const wxAny& any) \
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{ \
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return new CLASSNAME(wxANY_AS(any, T)); \
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} \
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REGISTER_WXANY_CONVERSION(T, CLASSNAME)
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#else // if !wxUSE_ANY
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#define DECLARE_WXANY_CONVERSION()
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#define REGISTER_WXANY_CONVERSION(T, CLASSNAME)
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#define IMPLEMENT_TRIVIAL_WXANY_CONVERSION(T, CLASSNAME)
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#endif // wxUSE_ANY/!wxUSE_ANY
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#define DECLARE_VARIANT_OBJECT(classname) \
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DECLARE_VARIANT_OBJECT_EXPORTED(classname, wxEMPTY_PARAMETER_VALUE)
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#define DECLARE_VARIANT_OBJECT_EXPORTED(classname,expdecl) \
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expdecl classname& operator << ( classname &object, const wxVariant &variant ); \
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expdecl wxVariant& operator << ( wxVariant &variant, const classname &object );
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#define IMPLEMENT_VARIANT_OBJECT(classname) \
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IMPLEMENT_VARIANT_OBJECT_EXPORTED(classname, wxEMPTY_PARAMETER_VALUE)
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#define IMPLEMENT_VARIANT_OBJECT_EXPORTED_NO_EQ(classname,expdecl) \
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class classname##VariantData: public wxVariantData \
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{ \
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public:\
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classname##VariantData() {} \
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classname##VariantData( const classname &value ) { m_value = value; } \
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\
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classname &GetValue() { return m_value; } \
|
|
\
|
|
virtual bool Eq(wxVariantData& data) const; \
|
|
\
|
|
virtual wxString GetType() const; \
|
|
virtual wxClassInfo* GetValueClassInfo(); \
|
|
\
|
|
virtual wxVariantData* Clone() const { return new classname##VariantData(m_value); } \
|
|
\
|
|
DECLARE_WXANY_CONVERSION() \
|
|
protected:\
|
|
classname m_value; \
|
|
};\
|
|
\
|
|
wxString classname##VariantData::GetType() const\
|
|
{\
|
|
return m_value.GetClassInfo()->GetClassName();\
|
|
}\
|
|
\
|
|
wxClassInfo* classname##VariantData::GetValueClassInfo()\
|
|
{\
|
|
return m_value.GetClassInfo();\
|
|
}\
|
|
\
|
|
expdecl classname& operator << ( classname &value, const wxVariant &variant )\
|
|
{\
|
|
wxASSERT( variant.GetType() == #classname );\
|
|
\
|
|
classname##VariantData *data = (classname##VariantData*) variant.GetData();\
|
|
value = data->GetValue();\
|
|
return value;\
|
|
}\
|
|
\
|
|
expdecl wxVariant& operator << ( wxVariant &variant, const classname &value )\
|
|
{\
|
|
classname##VariantData *data = new classname##VariantData( value );\
|
|
variant.SetData( data );\
|
|
return variant;\
|
|
} \
|
|
IMPLEMENT_TRIVIAL_WXANY_CONVERSION(classname, classname##VariantData)
|
|
|
|
// implements a wxVariantData-derived class using for the Eq() method the
|
|
// operator== which must have been provided by "classname"
|
|
#define IMPLEMENT_VARIANT_OBJECT_EXPORTED(classname,expdecl) \
|
|
IMPLEMENT_VARIANT_OBJECT_EXPORTED_NO_EQ(classname,wxEMPTY_PARAMETER_VALUE expdecl) \
|
|
\
|
|
bool classname##VariantData::Eq(wxVariantData& data) const \
|
|
{\
|
|
wxASSERT( GetType() == data.GetType() );\
|
|
\
|
|
classname##VariantData & otherData = (classname##VariantData &) data;\
|
|
\
|
|
return otherData.m_value == m_value;\
|
|
}\
|
|
|
|
|
|
// implements a wxVariantData-derived class using for the Eq() method a shallow
|
|
// comparison (through wxObject::IsSameAs function)
|
|
#define IMPLEMENT_VARIANT_OBJECT_SHALLOWCMP(classname) \
|
|
IMPLEMENT_VARIANT_OBJECT_EXPORTED_SHALLOWCMP(classname, wxEMPTY_PARAMETER_VALUE)
|
|
#define IMPLEMENT_VARIANT_OBJECT_EXPORTED_SHALLOWCMP(classname,expdecl) \
|
|
IMPLEMENT_VARIANT_OBJECT_EXPORTED_NO_EQ(classname,wxEMPTY_PARAMETER_VALUE expdecl) \
|
|
\
|
|
bool classname##VariantData::Eq(wxVariantData& data) const \
|
|
{\
|
|
wxASSERT( GetType() == data.GetType() );\
|
|
\
|
|
classname##VariantData & otherData = (classname##VariantData &) data;\
|
|
\
|
|
return (otherData.m_value.IsSameAs(m_value));\
|
|
}\
|
|
|
|
|
|
// Since we want type safety wxVariant we need to fetch and dynamic_cast
|
|
// in a seemingly safe way so the compiler can check, so we define
|
|
// a dynamic_cast /wxDynamicCast analogue.
|
|
|
|
#define wxGetVariantCast(var,classname) \
|
|
((classname*)(var.IsValueKindOf(&classname::ms_classInfo) ?\
|
|
var.GetWxObjectPtr() : NULL));
|
|
|
|
// Replacement for using wxDynamicCast on a wxVariantData object
|
|
#ifndef wxNO_RTTI
|
|
#define wxDynamicCastVariantData(data, classname) dynamic_cast<classname*>(data)
|
|
#endif
|
|
|
|
#define wxStaticCastVariantData(data, classname) static_cast<classname*>(data)
|
|
|
|
extern wxVariant WXDLLIMPEXP_BASE wxNullVariant;
|
|
|
|
#endif // wxUSE_VARIANT
|
|
|
|
#endif // _WX_VARIANT_H_
|