01f953efb2
Implement preferred language selection on modern systems (OS X, Windows Vista+). User settings for locale (aka "regional settings") and UI language are independent there and the UI language shouldn't be determined from the locale. Moreover, the OS provides a list of preferred languages, not a single value (as with locale), so we should use the best language given user's preferences and available translations. A Czech user may prefer Slovak UI over English, for example, and we should use Slovak translation in absence of Czech one in that case instead of falling back to English. On Unix, locale is language and so things remain as before. Notice that calling wxLocale::Init(wxLANGUAGE_DEFAULT) does the right thing now: it sets the locale to whatever the user has configured in regional settings and loads translations corresponding to default wxTranslations language, which is determined as described above. Previously, UI would be translated using a language corresponding to the regional settings. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72430 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
497 lines
16 KiB
Objective-C
497 lines
16 KiB
Objective-C
/////////////////////////////////////////////////////////////////////////////
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// Name: intl.h
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// Purpose: interface of wxLocale
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// Author: wxWidgets team
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// RCS-ID: $Id$
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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/**
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This is the layout direction stored in wxLanguageInfo and returned by
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wxApp::GetLayoutDirection(), wxWindow::GetLayoutDirection(),
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wxDC::GetLayoutDirection() for RTL (right-to-left) languages support.
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*/
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enum wxLayoutDirection
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{
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wxLayout_Default,
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wxLayout_LeftToRight,
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wxLayout_RightToLeft
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};
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/**
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Encapsulates a ::wxLanguage identifier together with OS-specific information
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related to that language.
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@beginWxPerlOnly
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In wxPerl @c Wx::LanguageInfo has only one method:
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- Wx::LanguageInfo->new(language, canonicalName, WinLang, WinSubLang, Description)
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@endWxPerlOnly
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*/
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struct wxLanguageInfo
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{
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/// ::wxLanguage id.
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/// It should be greater than @c wxLANGUAGE_USER_DEFINED when defining your own
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/// language info structure.
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int Language;
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/// Canonical name of the language, e.g. @c fr_FR.
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wxString CanonicalName;
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//@{
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/**
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Win32 language identifiers (LANG_xxxx, SUBLANG_xxxx).
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@onlyfor{wxmsw}
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*/
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wxUint32 WinLang, WinSublang;
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//@}
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/// Human-readable name of the language.
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wxString Description;
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/// The layout direction used for this language.
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wxLayoutDirection LayoutDirection;
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/// Return the LCID corresponding to this language.
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/// @onlyfor{wxmsw}
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wxUint32 GetLCID() const;
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/// Return the locale name corresponding to this language usable with
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/// @c setlocale() on the current system.
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wxString GetLocaleName() const;
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};
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/**
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The category of locale settings.
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@see wxLocale::GetInfo()
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*/
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enum wxLocaleCategory
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{
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/// Number formatting.
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wxLOCALE_CAT_NUMBER,
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/// Date/time formatting.
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wxLOCALE_CAT_DATE,
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/// Monetary values formatting.
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wxLOCALE_CAT_MONEY,
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/**
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Default category for the wxLocaleInfo value.
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This category can be used for values which only make sense for a single
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category, e.g. wxLOCALE_SHORT_DATE_FMT which can only be used with
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wxLOCALE_CAT_DATE. As this is the default value of the second parameter
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of wxLocale::GetInfo(), wxLOCALE_CAT_DATE can be omitted when asking
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for wxLOCALE_SHORT_DATE_FMT value.
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@since 2.9.0
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*/
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wxLOCALE_CAT_DEFAULT
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};
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/**
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The values understood by wxLocale::GetInfo().
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Note that for the @c wxLOCALE_*_FMT constants (the date and time formats),
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the strings returned by wxLocale::GetInfo() use strftime() or,
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equivalently, wxDateTime::Format() format. If the relevant format
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couldn't be determined, an empty string is returned -- there is no
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fallback value so that the application could determine the best course
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of actions itself in such case.
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All of these values are used with @c wxLOCALE_CAT_DATE in wxLocale::GetInfo() or,
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more typically, with @c wxLOCALE_CAT_DEFAULT as they only apply to a single category.
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*/
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enum wxLocaleInfo
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{
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/**
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The thousands separator.
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This value can be used with either wxLOCALE_CAT_NUMBER or
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wxLOCALE_CAT_MONEY categories.
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*/
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wxLOCALE_THOUSANDS_SEP,
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/**
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The character used as decimal point.
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This value can be used with either wxLOCALE_CAT_NUMBER or
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wxLOCALE_CAT_MONEY categories.
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*/
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wxLOCALE_DECIMAL_POINT,
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/**
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Short date format.
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Notice that short and long date formats may be the same under POSIX
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systems currently but may, and typically are, different under MSW or OS X.
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@since 2.9.0
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*/
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wxLOCALE_SHORT_DATE_FMT,
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/**
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Long date format.
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@since 2.9.0
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*/
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wxLOCALE_LONG_DATE_FMT,
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/**
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Date and time format.
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@since 2.9.0
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*/
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wxLOCALE_DATE_TIME_FMT,
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/**
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Time format.
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@since 2.9.0
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*/
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wxLOCALE_TIME_FMT
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};
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/**
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@class wxLocale
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wxLocale class encapsulates all language-dependent settings and is a
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generalization of the C locale concept.
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In wxWidgets this class manages current locale. It also initializes and
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activates wxTranslations object that manages message catalogs.
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For a list of the supported languages, please see ::wxLanguage enum values.
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These constants may be used to specify the language in wxLocale::Init and
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are returned by wxLocale::GetSystemLanguage.
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@beginWxPerlOnly
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In wxPerl you can't use the '_' function name, so
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the @c Wx::Locale module can export the @c gettext and
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@c gettext_noop under any given name.
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@code
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# this imports gettext ( equivalent to Wx::GetTranslation
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# and gettext_noop ( a noop )
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# into your module
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use Wx::Locale qw(:default);
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# ....
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# use the functions
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print gettext( "Panic!" );
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button = Wx::Button-new( window, -1, gettext( "Label" ) );
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@endcode
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If you need to translate a lot of strings, then adding gettext( ) around
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each one is a long task ( that is why _( ) was introduced ), so just choose
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a shorter name for gettext:
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@code
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use Wx::Locale 'gettext' = 't',
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'gettext_noop' = 'gettext_noop';
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# ...
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# use the functions
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print t( "Panic!!" );
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# ...
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@endcode
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@endWxPerlOnly
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@library{wxbase}
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@category{cfg}
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@see @ref overview_i18n, @ref page_samples_internat, wxXLocale, wxTranslations
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*/
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class wxLocale
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{
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public:
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/**
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This is the default constructor and it does nothing to initialize the object:
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Init() must be used to do that.
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*/
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wxLocale();
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/**
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See Init() for parameters description.
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*/
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wxLocale(int language, int flags = wxLOCALE_LOAD_DEFAULT);
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/**
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See Init() for parameters description.
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The call of this function has several global side effects which you should
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understand: first of all, the application locale is changed - note that this
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will affect many of standard C library functions such as printf() or strftime().
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Second, this wxLocale object becomes the new current global locale for the
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application and so all subsequent calls to ::wxGetTranslation() will try to
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translate the messages using the message catalogs for this locale.
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*/
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wxLocale(const wxString& name,
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const wxString& shortName = wxEmptyString,
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const wxString& locale = wxEmptyString,
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bool bLoadDefault = true);
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/**
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The destructor, like the constructor, also has global side effects: the
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previously set locale is restored and so the changes described in
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Init() documentation are rolled back.
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*/
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virtual ~wxLocale();
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/**
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Calls wxTranslations::AddCatalog(const wxString&).
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*/
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bool AddCatalog(const wxString& domain);
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/**
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Calls wxTranslations::AddCatalog(const wxString&, wxLanguage).
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*/
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bool AddCatalog(const wxString& domain, wxLanguage msgIdLanguage);
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/**
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Calls wxTranslations::AddCatalog(const wxString&, wxLanguage, const wxString&).
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*/
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bool AddCatalog(const wxString& domain, wxLanguage msgIdLanguage,
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const wxString& msgIdCharset);
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/**
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Calls wxFileTranslationsLoader::AddCatalogLookupPathPrefix().
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*/
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static void AddCatalogLookupPathPrefix(const wxString& prefix);
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/**
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Adds custom, user-defined language to the database of known languages.
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This database is used in conjunction with the first form of Init().
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*/
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static void AddLanguage(const wxLanguageInfo& info);
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/**
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This function may be used to find the language description structure for the
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given locale, specified either as a two letter ISO language code (for example,
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"pt"), a language code followed by the country code ("pt_BR") or a full, human
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readable, language description ("Portuguese-Brazil").
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Returns the information for the given language or @NULL if this language
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is unknown. Note that even if the returned pointer is valid, the caller
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should @e not delete it.
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@see GetLanguageInfo()
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*/
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static const wxLanguageInfo* FindLanguageInfo(const wxString& locale);
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/**
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Returns the canonical form of current locale name. Canonical form is the
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one that is used on UNIX systems: it is a two- or five-letter string in xx or
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xx_YY format, where xx is ISO 639 code of language and YY is ISO 3166 code of
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the country. Examples are "en", "en_GB", "en_US" or "fr_FR".
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This form is internally used when looking up message catalogs.
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Compare GetSysName().
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*/
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wxString GetCanonicalName() const;
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/**
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Calls wxTranslations::GetHeaderValue().
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*/
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wxString GetHeaderValue(const wxString& header,
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const wxString& domain = wxEmptyString) const;
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/**
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Returns the ::wxLanguage constant of current language.
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Note that you can call this function only if you used the form of
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Init() that takes ::wxLanguage argument.
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*/
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int GetLanguage() const;
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/**
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Returns a pointer to wxLanguageInfo structure containing information about
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the given language or @NULL if this language is unknown. Note that even if
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the returned pointer is valid, the caller should @e not delete it.
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See AddLanguage() for the wxLanguageInfo description.
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As with Init(), @c wxLANGUAGE_DEFAULT has the special meaning if passed
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as an argument to this function and in this case the result of
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GetSystemLanguage() is used.
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*/
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static const wxLanguageInfo* GetLanguageInfo(int lang);
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/**
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Returns English name of the given language or empty string if this
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language is unknown.
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See GetLanguageInfo() for a remark about special meaning of @c wxLANGUAGE_DEFAULT.
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*/
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static wxString GetLanguageName(int lang);
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/**
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Returns canonical name (see GetCanonicalName()) of the given language
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or empty string if this language is unknown.
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See GetLanguageInfo() for a remark about special meaning of @c wxLANGUAGE_DEFAULT.
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@since 2.9.1
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*/
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static wxString GetLanguageCanonicalName(int lang);
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/**
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Returns the locale name as passed to the constructor or Init().
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This is a full, human-readable name, e.g. "English" or "French".
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*/
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const wxString& GetLocale() const;
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/**
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Returns the current short name for the locale (as given to the constructor or
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the Init() function).
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*/
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const wxString& GetName() const;
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/**
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Calls wxTranslations::GetString(const wxString&, const wxString&) const.
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*/
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virtual const wxString& GetString(const wxString& origString,
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const wxString& domain = wxEmptyString) const;
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/**
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Calls wxTranslations::GetString(const wxString&, const wxString&, unsigned, const wxString&) const.
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*/
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virtual const wxString& GetString(const wxString& origString,
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const wxString& origString2, unsigned n,
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const wxString& domain = wxEmptyString) const;
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/**
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Returns current platform-specific locale name as passed to setlocale().
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Compare GetCanonicalName().
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*/
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wxString GetSysName() const;
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/**
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Tries to detect the user's default font encoding.
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Returns wxFontEncoding() value or @c wxFONTENCODING_SYSTEM if it
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couldn't be determined.
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*/
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static wxFontEncoding GetSystemEncoding();
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/**
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Tries to detect the name of the user's default font encoding.
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This string isn't particularly useful for the application as its form is
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platform-dependent and so you should probably use GetSystemEncoding() instead.
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Returns a user-readable string value or an empty string if it couldn't be
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determined.
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*/
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static wxString GetSystemEncodingName();
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/**
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Tries to detect the user's default locale setting.
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Returns the ::wxLanguage value or @c wxLANGUAGE_UNKNOWN if the language-guessing
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algorithm failed.
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@note This function works with @em locales and returns the user's default
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locale. This may be, and usually is, the same as their preferred UI
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language, but it's not the same thing. Use wxTranslation to obtain
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@em language information.
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@see wxTranslations::GetBestTranslation().
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*/
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static int GetSystemLanguage();
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/**
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Get the values of the given locale-dependent datum.
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This function returns the value of the locale-specific option specified
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by the given @a index.
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@param index
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One of the elements of wxLocaleInfo enum.
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@param cat
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The category to use with the given index or wxLOCALE_CAT_DEFAULT if
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the index can only apply to a single category.
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@return
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The option value or empty string if the function failed.
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*/
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static wxString GetInfo(wxLocaleInfo index,
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wxLocaleCategory cat = wxLOCALE_CAT_DEFAULT);
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/**
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Initializes the wxLocale instance.
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The call of this function has several global side effects which you should
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understand: first of all, the application locale is changed - note that
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this will affect many of standard C library functions such as printf()
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or strftime().
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Second, this wxLocale object becomes the new current global locale for
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the application and so all subsequent calls to wxGetTranslation() will
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try to translate the messages using the message catalogs for this locale.
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@param language
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::wxLanguage identifier of the locale.
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@c wxLANGUAGE_DEFAULT has special meaning -- wxLocale will use system's
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default language (see GetSystemLanguage()).
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@param flags
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Combination of the following:
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- wxLOCALE_LOAD_DEFAULT: Load the message catalog for the given locale
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containing the translations of standard wxWidgets messages
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automatically.
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- wxLOCALE_DONT_LOAD_DEFAULT: Negation of wxLOCALE_LOAD_DEFAULT.
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@return @true on success or @false if the given locale couldn't be set.
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*/
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bool Init(int language = wxLANGUAGE_DEFAULT,
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int flags = wxLOCALE_LOAD_DEFAULT);
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/**
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@deprecated
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This form is deprecated, use the other one unless you know what you are doing.
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@param name
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The name of the locale. Only used in diagnostic messages.
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@param short
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The standard 2 letter locale abbreviation; it is used as the
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directory prefix when looking for the message catalog files.
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@param locale
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The parameter for the call to setlocale().
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Note that it is platform-specific.
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@param bLoadDefault
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May be set to @false to prevent loading of the message catalog for the
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given locale containing the translations of standard wxWidgets messages.
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This parameter would be rarely used in normal circumstances.
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*/
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bool Init(const wxString& name, const wxString& shortName = wxEmptyString,
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const wxString& locale = wxEmptyString, bool bLoadDefault = true);
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/**
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Check whether the operating system and/or C run time environment supports
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this locale. For example in Windows 2000 and Windows XP, support for many
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locales is not installed by default. Returns @true if the locale is
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supported.
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The argument @a lang is the ::wxLanguage identifier. To obtain this for a
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given a two letter ISO language code, use FindLanguageInfo() to obtain its
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wxLanguageInfo structure.
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See AddLanguage() for the wxLanguageInfo description.
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@since 2.7.1.
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*/
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static bool IsAvailable(int lang);
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/**
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Calls wxTranslations::IsLoaded().
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*/
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bool IsLoaded(const wxString& domain) const;
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/**
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Returns @true if the locale could be set successfully.
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*/
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bool IsOk() const;
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};
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