X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/87f351de6c8d4cf2af78e36b3ceccf21bc8ec937..736fe67c66e0f5a552f3b45e13d288f5c650c46e:/include/wx/arrstr.h diff --git a/include/wx/arrstr.h b/include/wx/arrstr.h index ac59ff6483..a78d09e9dd 100644 --- a/include/wx/arrstr.h +++ b/include/wx/arrstr.h @@ -362,4 +362,81 @@ WXDLLIMPEXP_BASE wxArrayString wxSplit(const wxString& str, const wxChar sep, const wxChar escape = wxT('\\')); + +// ---------------------------------------------------------------------------- +// This helper class allows to pass both C array of wxStrings or wxArrayString +// using the same interface. +// +// Use it when you have two methods taking wxArrayString or (int, wxString[]), +// that do the same thing. This class lets you iterate over input data in the +// same way whether it is a raw array of strings or wxArrayString. +// +// The object does not take ownership of the data -- internally it keeps +// pointers to the data, therefore the data must be disposed of by user +// and only after this object is destroyed. Usually it is not a problem as +// only temporary objects of this class are used. +// ---------------------------------------------------------------------------- + +class wxArrayStringsAdapter +{ +public: + // construct an adapter from a wxArrayString + wxArrayStringsAdapter(const wxArrayString& strings) + : m_type(wxSTRING_ARRAY), m_size(strings.size()) + { + m_data.array = &strings; + } + + // construct an adapter from a wxString[] + wxArrayStringsAdapter(unsigned int n, const wxString *strings) + : m_type(wxSTRING_POINTER), m_size(n) + { + m_data.ptr = strings; + } + + // construct an adapter from a single wxString + wxArrayStringsAdapter(const wxString& s) + : m_type(wxSTRING_POINTER), m_size(1) + { + m_data.ptr = &s; + } + + // default copy constructor is ok + + // iteration interface + unsigned int GetCount() const { return m_size; } + bool IsEmpty() const { return GetCount() == 0; } + const wxString& operator[] (unsigned int i) const + { + wxASSERT_MSG( i < GetCount(), wxT("index out of bounds") ); + if(m_type == wxSTRING_POINTER) + return m_data.ptr[i]; + return m_data.array->Item(i); + } + wxArrayString AsArrayString() const + { + if(m_type == wxSTRING_ARRAY) + return *m_data.array; + return wxArrayString(GetCount(), m_data.ptr); + } + +private: + // type of the data being held + enum wxStringContainerType + { + wxSTRING_ARRAY, // wxArrayString + wxSTRING_POINTER // wxString[] + }; + + wxStringContainerType m_type; + unsigned int m_size; + union + { + const wxString * ptr; + const wxArrayString * array; + } m_data; + + DECLARE_NO_ASSIGN_CLASS(wxArrayStringsAdapter) +}; + #endif // _WX_ARRSTR_H