Add wx headers and ext

wxheaders/wx/private/uilocale.h

@@ -0,0 +1,90 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/private/uilocale.h
+// Purpose:     wxUILocaleImpl class declaration
+// Author:      Vadim Zeitlin
+// Created:     2021-08-01
+// Copyright:   (c) 2021 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_PRIVATE_UILOCALE_H_
+#define _WX_PRIVATE_UILOCALE_H_
+
+#include "wx/localedefs.h"
+#include "wx/object.h"
+#include "wx/string.h"
+#include "wx/vector.h"
+
+typedef wxVector<wxLanguageInfo> wxLanguageInfos;
+
+// Return the vector of all languages known to wx.
+const wxLanguageInfos& wxGetLanguageInfos();
+
+// Function returning hard-coded values for the "C" locale.
+wxString wxGetStdCLocaleInfo(wxLocaleInfo index, wxLocaleCategory cat);
+
+// ----------------------------------------------------------------------------
+// wxUILocaleImpl provides the implementation of public wxUILocale functions
+// ----------------------------------------------------------------------------
+
+class wxUILocaleImpl : public wxRefCounter
+{
+public:
+    // This function is implemented in platform-specific code and returns the
+    // object used by default, i.e. if wxUILocale::UseDefault() is not called.
+    // This object corresponds to the traditional "C" locale.
+    //
+    // It should never return NULL.
+    static wxUILocaleImpl* CreateStdC();
+
+    // Similarly, this one returns the object corresponding to the default user
+    // locale settings which is used if wxUILocale::UseDefault() was called.
+    //
+    // It may return NULL in case of failure.
+    static wxUILocaleImpl* CreateUserDefault();
+
+    // Create locale object for the given locale.
+    //
+    // It may return NULL in case of failure.
+    static wxUILocaleImpl* CreateForLocale(const wxLocaleIdent& locId);
+
+    // This function exists only for wxLocale compatibility and creates the
+    // locale corresponding to the given language. It shouldn't be used
+    // anywhere else.
+    //
+    // It is implemented in terms of CreateForLocale() for non-MSW platforms,
+    // but under MSW it is different for compatibility reasons.
+    //
+    // The language passed to this function is a valid language, i.e. neither
+    // wxLANGUAGE_UNKNOWN nor wxLANGUAGE_DEFAULT.
+    //
+    // It may return NULL in case of failure, but never does so for English
+    // languages because wxLocale(wxLANGUAGE_ENGLISH) is always supposed to
+    // work, so it just falls back on CreateStdC() if it fails to create it.
+    static wxUILocaleImpl* CreateForLanguage(const wxLanguageInfo& info);
+
+    // This function retrieves a list of preferred UI languages.
+    // The list is in the order of preference, if it has more than one entry.
+    // The entries contain platform-dependent identifiers.
+    static wxVector<wxString> GetPreferredUILanguages();
+
+    // Use this locale in the UI.
+    //
+    // This is not implemented for all platforms, notably not for Mac where the
+    // UI locale is determined at application startup, but we can't do anything
+    // about it anyhow, so we don't even bother returning an error code from it.
+    virtual void Use() = 0;
+
+    // Functions corresponding to wxUILocale ones.
+    virtual wxString GetName() const = 0;
+    virtual wxLocaleIdent GetLocaleId() const = 0;
+    virtual wxString GetInfo(wxLocaleInfo index, wxLocaleCategory cat) const = 0;
+    virtual wxString GetLocalizedName(wxLocaleName name, wxLocaleForm form) const = 0;
+    virtual wxLayoutDirection GetLayoutDirection() const = 0;
+    virtual int CompareStrings(const wxString& lhs, const wxString& rhs,
+                               int flags) const = 0;
+
+    virtual ~wxUILocaleImpl() { }
+};
+
+#endif // _WX_PRIVATE_UILOCALE_H_