/*
* Copyright (c) 2008-2021 Jonathan Schleifer <js@nil.im>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#import "OFObject.h"
#import "OFString.h"
OF_ASSUME_NONNULL_BEGIN
/** @file */
/**
* @def OF_LOCALIZED
*
* @brief Returns the localized string for the specified ID with the specified
* arguments inserted.
*
* @param ID The ID of the localized string to retrieve
* @return The localized string with the specified arguments replaced
*/
#define OF_LOCALIZED(ID, ...) \
[[OFLocale currentLocale] localizedStringForID: ID \
fallback: __VA_ARGS__, nil]
@class OFMutableArray OF_GENERIC(ObjectType);
@class OFDictionary OF_GENERIC(KeyType, ObjectType);
/**
* @class OFLocale OFLocale.h ObjFW/OFLocale.h
*
* @brief A class for querying the locale and retrieving localized strings.
*/
OF_SUBCLASSING_RESTRICTED
@interface OFLocale: OFObject
{
OFString *_Nullable _language, *_Nullable _territory;
OFStringEncoding _encoding;
OFString *_decimalPoint;
OFMutableArray OF_GENERIC(OFDictionary OF_GENERIC(OFString *, id) *)
*_localizedStrings;
}
#ifdef OF_HAVE_CLASS_PROPERTIES
@property (class, readonly, nullable, nonatomic) OFLocale *currentLocale;
@property (class, readonly, nullable, nonatomic) OFString *language;
@property (class, readonly, nullable, nonatomic) OFString *territory;
@property (class, readonly, nonatomic) OFStringEncoding encoding;
@property (class, readonly, nullable, nonatomic) OFString *decimalPoint;
#endif
/**
* @brief The language of the locale for messages.
*
* If the language is unknown, it is `nil`.
*/
@property OF_NULLABLE_PROPERTY (readonly, nonatomic) OFString *language;
/**
* @brief The territory of the locale for messages.
*
* If the territory is unknown, it is `nil`.
*/
@property OF_NULLABLE_PROPERTY (readonly, nonatomic) OFString *territory;
/**
* @brief The native 8-bit string encoding of the locale for messages.
*
* This is useful to encode strings correctly for passing them to operating
* system calls.
*
* If the native 8-bit encoding is unknown, UTF-8 is assumed.
*/
@property (readonly, nonatomic) OFStringEncoding encoding;
/**
* @brief The decimal point of the system's locale.
*/
@property (readonly, nonatomic) OFString *decimalPoint;
/**
* @brief Returns the current OFLocale.
*
* @warning If you don't use @ref OFApplication, this might be `nil`! In this
* case, you need to manually allocate an instance and call
* @ref init once.
*
* @return The current OFLocale instance
*/
+ (nullable OFLocale *)currentLocale;
/**
* @brief Returns the language of the locale.
*
* If the language is unknown, `nil` is returned.
*
* @return The language of the locale.
*/
+ (nullable OFString *)language;
/**
* @brief Returns the territory of the locale.
*
* If the territory is unknown, `nil` is returned.
*
* @return The territory of the locale.
*/
+ (nullable OFString *)territory;
/**
* @brief Returns the native 8-bit string encoding for the locale.
*
* This is useful to encode strings correctly for passing them to operating
* system calls.
*
* If the native 8-bit encoding is unknown, UTF-8 is assumed.
*
* @return The native 8-bit string encoding for the locale
*/
+ (OFStringEncoding)encoding;
/**
* @brief Returns the decimal point of the system's locale.
*
* @return The decimal point of the system's locale
*/
+ (nullable OFString *)decimalPoint;
#ifdef OF_HAVE_FILES
/**
* @brief Adds a directory to scan for language files.
*
* @param path The path to the directory to scan for language files
*/
+ (void)addLanguageDirectory: (OFString *)path;
#endif
/**
* @brief Initializes the current OFLocale.
*
* @warning This sets the locale via `setlocale()`!
*
* @warning You should never call this yourself, except if you do not use
* @ref OFApplication. In this case, you need to allocate exactly one
* instance of OFLocale, which will be come the current locale, and
* call this method.
*/
- (instancetype)init;
#ifdef OF_HAVE_FILES
/**
* @brief Adds a directory to scan for language files.
*
* @param path The path to the directory to scan for language files
*/
- (void)addLanguageDirectory: (OFString *)path;
#endif
/**
* @brief Returns the localized string for the specified ID, using the fallback
* string if it cannot be looked up or is missing.
*
* @note This takes a variadic argument, terminated by `nil`, that consists of
* pairs of variable names and variable values, which will be replaced
* inside the localized string. For example, you can pass
* `@"name", @"foo", nil`, causing `%[name]` to be replaced with `foo` in
* the localized string.
*
* @note Generally, you want to use @ref OF_LOCALIZED instead, which also takes
* care of the `nil` sentinel automatically.
*
* @param ID The ID for the localized string
* @param fallback The fallback to use in case the localized string cannot be
* looked up or is missing. This can also be an array and use
* plural scripting, just like with the JSON language files.
* @return The localized string
*/
- (OFString *)localizedStringForID: (OFConstantString *)ID
fallback: (id)fallback, ... OF_SENTINEL;
/**
* @brief Returns the localized string for the specified ID, using the fallback
* string if it cannot be looked up or is missing.
*
* @note This takes a variadic argument, terminated by `nil` and passed as
* va_list, that consists of pairs of variable names and variable values,
* which will be replaced inside the localized string. For example, you
* can pass `@"name", @"foo", nil`, causing `%[name]` to be replaced with
* `foo` in the localized string.
*
* @note Generally, you want to use @ref OF_LOCALIZED instead, which also takes
* care of the `nil` sentinel automatically.
*
* @param ID The ID for the localized string
* @param fallback The fallback to use in case the localized string cannot be
* looked up or is missing. This can also be an array and use
* plural scripting, just like with the JSON language files.
* @param arguments A va_list of arguments, consisting of pairs of variable
* names and values to replace in the localized string,
* terminated with `nil`
* @return The localized string
*/
- (OFString *)localizedStringForID: (OFConstantString *)ID
fallback: (id)fallback
arguments: (va_list)arguments;
@end
OF_ASSUME_NONNULL_END