/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017
* Jonathan Schleifer <js@heap.zone>
*
* 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 */
#define OF_LOCALIZED(ID, ...) \
[[OFLocalization sharedLocalization] \
localizedStringForID: ID \
fallback: __VA_ARGS__, nil]
@class OFMutableArray OF_GENERIC(ObjectType);
@class OFDictionary OF_GENERIC(KeyType, ObjectType);
/*!
* @class OFLocalization OFLocalization.h ObjFW/OFLocalization.h
*
* @brief A class for querying the locale and retrieving localized strings.
*/
@interface OFLocalization: OFObject
{
OFString *_language;
OFString *_territory;
of_string_encoding_t _encoding;
OFString *_decimalPoint;
OFMutableArray OF_GENERIC(OFDictionary OF_GENERIC(OFString *, id) *)
*_localizedStrings;
}
/**
* The language of the locale for messages.
*
* If the language is unknown, it is `nil`.
*/
@property OF_NULLABLE_PROPERTY (readonly, nonatomic) OFString *language;
/*!
* The territory of the locale for messages.
*
* If the territory is unknown, it is `nil`.
*/
@property OF_NULLABLE_PROPERTY (readonly, nonatomic) OFString *territory;
/*!
* 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) of_string_encoding_t encoding;
/*!
* The decimal point of the system's locale.
*/
@property (readonly, nonatomic) OFString *decimalPoint;
/*!
* @brief Returns the shared OFLocalization instance.
*
* @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 shared OFLocalization instance
*/
+ (instancetype)sharedLocalization;
/**
* @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
*/
+ (of_string_encoding_t)encoding;
/*!
* @brief Returns the decimal point of the system's locale.
*
* @return The decimal point of the system's locale
*/
+ (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 OFLocalization singleton with the specified locale.
*
* @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 OFLocalization, which will be come the singleton, and
* call this method.
*/
- 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
* @return The localized string
*/
- (OFString *)localizedStringForID: (OFConstantString *)ID
fallback: (OFConstantString *)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
* @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: (OFConstantString *)fallback
arguments: (va_list)arguments;
@end
OF_ASSUME_NONNULL_END