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gecko-dev/modules/libnls/headers/locid.h
tague f3731166a5 added libnls headers to public build
1998-05-27 02:02:27 +00:00

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/*
*****************************************************************************************
* *
* COPYRIGHT: *
* (C) Copyright Taligent, Inc., 1996 *
* (C) Copyright International Business Machines Corporation, 1996 *
* Licensed Material - Program-Property of IBM - All Rights Reserved. *
* US Government Users Restricted Rights - Use, duplication, or disclosure *
* restricted by GSA ADP Schedule Contract with IBM Corp. *
* *
*****************************************************************************************
*
* File locid.h
*
* Created by: Helena Shih
*
* Modification History:
*
* Date Name Description
* 02/11/97 aliu Changed gLocPath to fgLocPath and added methods to
* get and set it.
* 04/02/97 aliu Made operator!= inline; fixed return value of getName().
* 04/15/97 aliu Cleanup for AIX/Win32.
* 04/24/97 aliu Numerous changes per code review.
*****************************************************************************************
*/
#ifndef _LOCID
#define _LOCID
#ifndef _UNISTRING
#include "unistring.h"
#endif
/**
*
* A <code>Locale</code> object represents a specific geographical, political,
* or cultural region. An operation that requires a <code>Locale</code> to perform
* its task is called <em>locale-sensitive</em> and uses the <code>Locale</code>
* to tailor information for the user. For example, displaying a number
* is a locale-sensitive operation--the number should be formatted
* according to the customs/conventions of the user's native country,
* region, or culture.
*
* <P>
* You create a <code>Locale</code> object using one of the two constructors in
* this class:
* <blockquote>
* <pre>
* . Locale(String language, String country)
* . Locale(String language, String country, String variant)
* </pre>
* </blockquote>
* The first argument to both constructors is a valid <STRONG>ISO
* Language Code.</STRONG> These codes are the lower-case two-letter
* codes as defined by ISO-639.
* You can find a full list of these codes at a number of sites, such as:
* <BR><a href ="http://www.ics.uci.edu/pub/ietf/http/related/iso639.txt">
* <code>http://www.ics.uci.edu/pub/ietf/http/related/iso639.txt</code></a>
*
* <P>
* The second argument to both constructors is a valid <STRONG>ISO Country
* Code.</STRONG> These codes are the upper-case two-letter codes
* as defined by ISO-3166.
* You can find a full list of these codes at a number of sites, such as:
* <BR><a href="http://www.chemie.fu-berlin.de/diverse/doc/ISO_3166.html">
* <code>http://www.chemie.fu-berlin.de/diverse/doc/ISO_3166.html</code></a>
*
* <P>
* The second constructor requires a third argument--the <STRONG>Variant.</STRONG>
* The Variant codes are vendor and browser-specific.
* For example, use WIN for Windows, MAC for Macintosh, and POSIX for POSIX.
* Where there are two variants, separate them with an underscore, and
* put the most important one first. For
* example, a Traditional Spanish collation might be referenced, with
* "ES", "ES", "Traditional_WIN".
*
* <P>
* Because a <code>Locale</code> object is just an identifier for a region,
* no validity check is performed when you construct a <code>Locale</code>.
* If you want to see whether particular resources are available for the
* <code>Locale</code> you construct, you must query those resources. For
* example, ask the <code>NumberFormat</code> for the locales it supports
* using its <code>getAvailableLocales</code> method.
* <BR><STRONG>Note:</STRONG> When you ask for a resource for a particular
* locale, you get back the best available match, not necessarily
* precisely what you asked for. For more information, look at
* <a href="java.util.ResourceBundle.html"><code>ResourceBundle</code></a>.
*
* <P>
* The <code>Locale</code> class provides a number of convenient constants
* that you can use to create <code>Locale</code> objects for commonly used
* locales. For example, the following refers to a <code>Locale</code> object
* for the United States:
* <blockquote>
* <pre>
* . Locale::US
* </pre>
* </blockquote>
*
* <P>
* Once you've created a <code>Locale</code> you can query it for information about
* itself. Use <code>getCountry</code> to get the ISO Country Code and
* <code>getLanguage</code> to get the ISO Language Code. You can
* use <code>getDisplayCountry</code> to get the
* name of the country suitable for displaying to the user. Similarly,
* you can use <code>getDisplayLanguage</code> to get the name of
* the language suitable for displaying to the user. Interestingly,
* the <code>getDisplayXXX</code> methods are themselves locale-sensitive
* and have two versions: one that uses the default locale and one
* that takes a locale as an argument and displays the name or country in
* a language appropriate to that locale.
*
* <P>
* The TIFC provides a number of classes that perform locale-sensitive
* operations. For example, the <code>NumberFormat</code> class formats
* numbers, currency, or percentages in a locale-sensitive manner. Classes
* such as <code>NumberFormat</code> have a number of convenience methods
* for creating a default object of that type. For example, the
* <code>NumberFormat</code> class provides these three convenience methods
* for creating a default <code>NumberFormat</code> object:
* <blockquote>
* <pre>
* . NumberFormat.getInstance()
* . NumberFormat.getCurrencyInstance()
* . NumberFormat.getPercentInstance()
* </pre>
* </blockquote>
* Each of these methods has two variants; one with an explicit locale
* and one without; the latter using the default locale.
* <blockquote>
* <pre>
* . NumberFormat.getInstance(myLocale)
* . NumberFormat.getCurrencyInstance(myLocale)
* . NumberFormat.getPercentInstance(myLocale)
* </pre>
* </blockquote>
* A <code>Locale</code> is the mechanism for identifying the kind of object
* (<code>NumberFormat</code>) that you would like to get. The locale is
* <STRONG>just</STRONG> a mechanism for identifying objects,
* <STRONG>not</STRONG> a container for the objects themselves.
*
* <P>
* Each class that performs locale-sensitive operations allows you
* to get all the available objects of that type. You can sift
* through these objects by language, country, or variant,
* and use the display names to present a menu to the user.
* For example, you can create a menu of all the collation objects
* suitable for a given language. Such classes implement these
* three class methods:
* <blockquote>
* <pre>
* . static Locale* getAvailableLocales(t_int32& numLocales)
* . static UnicodeString& getDisplayName(const Locale& objectLocale,
* . const Locale& displayLocale,
* . UnicodeString& displayName)
* . static UnicodeString& getDisplayName(const Locale& objectLocale,
* . UnicodeString& displayName)
* </pre>
* </blockquote>
*/
#ifdef NLS_MAC
#pragma export on
#endif
class T_UTILITY_API Locale
{
public:
/**
* Useful constants for language.
*/
static const Locale ENGLISH;
static const Locale FRENCH;
static const Locale GERMAN;
static const Locale ITALIAN;
static const Locale JAPANESE;
static const Locale KOREAN;
static const Locale CHINESE;
static const Locale SCHINESE; // Simplified Chinese
static const Locale TCHINESE; // Traditional Chinese
/**
* Useful constants for country.
*/
static const Locale FRANCE;
static const Locale GERMANY;
static const Locale ITALY;
static const Locale JAPAN;
static const Locale KOREA;
static const Locale CHINA; // Alias for PRC
static const Locale PRC; // People's Republic of China
static const Locale TAIWAN; // Republic of China
static const Locale UK;
static const Locale US;
static const Locale CANADA;
static const Locale CANADA_FRENCH;
/**
* Construct an empty locale. It's only used when a fill-in parameter is
* needed.
*/
Locale();
/**
* Construct an locale from language.
*
* @param language Lowercase two-letter ISO-639 code.
*/
Locale( const UnicodeString& newLanguage);
/**
* Construct a locale from language, country.
*
* @param language Uppercase two-letter ISO-639 code.
* @param country Uppercase two-letter ISO-3166 code.
*/
Locale( const UnicodeString& language,
const UnicodeString& country);
/**
* Construct a locale from language, country, variant.
*
* @param language Lowercase two-letter ISO-639 code.
* @param country Uppercase two-letter ISO-3166 code.
* @param variant Uppercase vendor and browser specific code. See class
* description.
*/
Locale( const UnicodeString& language,
const UnicodeString& country,
const UnicodeString& variant);
/**
* Initializes an Locale object from another Locale object.
*
* @param other The Locale object being copied in.
*/
Locale(const Locale& other);
/**
* Initializes an Locale object from char*
*
* lang can be any one of lang, lang_co, or lang_co_variant
*/
Locale(const char *loc_id);
/**
* Destructor
*/
~Locale() { }
/**
* Replaces the entire contents of *this with the specified value.
*
* @param other The Locale object being copied in.
* @return *this
*/
Locale& operator=(const Locale& other);
/**
* Checks if two locale keys are the same.
*
* @param other The locale key object to be compared with this.
* @return True if the two locale keys are the same, false otherwise.
*/
t_bool operator==(const Locale& other) const;
/**
* Checks if two locale keys are not the same.
*
* @param other The locale key object to be compared with this.
* @return True if the two locale keys are not the same, false
* otherwise.
*/
t_bool operator!=(const Locale& other) const;
/**
* Common methods of getting the current default Locale. Used for the
* presentation: menus, dialogs, etc. Generally set once when your applet or
* application is initialized, then never reset. (If you do reset the
* default locale, you probably want to reload your GUI, so that the change
* is reflected in your interface.)
*
* More advanced programs will allow users to use different locales for
* different fields, e.g. in a spreadsheet.
*
* Note that the initial setting will match the host system.
*/
static const Locale& getDefault();
/**
* Sets the default. Normally set once at the beginning of applet or
* application, then never reset. setDefault does NOT reset the host locale.
*
* @param newLocale Locale to set to.
*/
static void setDefault(const Locale& newLocale,
ErrorCode& success);
/**
* Fills in "lang" with the locale's two-letter ISO-639 language code.
* @param lang Receives the language code.
* @return A reference to "lang".
*/
UnicodeString& getLanguage( UnicodeString& lang) const;
/**
* Fills in "cntry" with the locale's two-letter ISO-3166 country code.
* @param cntry Receives the country code.
* @return A reference to "cntry".
*/
UnicodeString& getCountry( UnicodeString& cntry) const;
/**
* Fills in "var" with the locale's variant code.
* @param var Receives the variant code.
* @return A reference to "var".
*/
UnicodeString& getVariant( UnicodeString& var) const;
/**
* Fills in "name" the programmatic name of the entire locale, with the language,
* country and variant separated by underbars. If a field is missing, at
* most one underbar will occur. Example: "en", "de_DE", "en_US_WIN",
* "de_POSIX", "fr_MAC"
* @param var Receives the programmatic locale name.
* @return A reference to "name".
*/
UnicodeString& getName( UnicodeString& name) const;
/**
* Fills in "name" with the locale's three-letter language code, as specified
* in ISO draft standard ISO-639-2..
* @param name Receives the three-letter language code.
* @return A reference to "name".
*/
UnicodeString& getISO3Language(UnicodeString& name) const;
/**
* Fills in "name" with the locale's three-letter ISO-3166 country code.
* @param name Receives the three-letter country code.
* @return A reference to "name".
*/
UnicodeString& getISO3Country( UnicodeString& name) const;
/**
* Returns the Windows LCID value corresponding to this locale.
* This value is stored in the resource data for the locale as a one-to-four-digit
* hexadecimal number. If the resource is missing, in the wrong format, or
* there is no Windows LCID value that corresponds to this locale, returns 0.
*/
t_uint32 getLCID() const;
/**
* Fills in "dispLang" with the name of this locale's language in a format suitable for
* user display in the default locale. For example, if the locale's language code is
* "fr" and the default locale's language code is "en", this function would set
* dispLang to "French".
* @param dispLang Receives the language's display name.
* @return A reference to "dispLang".
*/
UnicodeString& getDisplayLanguage(UnicodeString& dispLang) const;
/**
* Fills in "dispLang" with the name of this locale's language in a format suitable for
* user display in the locale specified by "inLocale". For example, if the locale's
* language code is "en" and inLocale's language code is "fr", this function would set
* dispLang to "Anglais".
* @param inLocale Specifies the locale to be used to display the name. In other words,
* if the locale's language code is "en", passing Locale::FRENCH for
* inLocale would result in "Anglais", while passing Locale::GERMAN
* for inLocale would result in "Englisch".
* @param dispLang Receives the language's display name.
* @return A reference to "dispLang".
*/
UnicodeString& getDisplayLanguage( const Locale& inLocale,
UnicodeString& dispLang) const;
/**
* Fills in "dispCountry" with the name of this locale's country in a format suitable
* for user display in the default locale. For example, if the locale's country code
* is "FR" and the default locale's language code is "en", this function would set
* dispCountry to "France".
* @param dispCountry Receives the country's display name.
* @return A reference to "dispCountry".
*/
UnicodeString& getDisplayCountry( UnicodeString& dispCountry) const;
/**
* Fills in "dispCountry" with the name of this locale's country in a format suitable
* for user display in the locale specified by "inLocale". For example, if the locale's
* country code is "US" and inLocale's language code is "fr", this function would set
* dispCountry to "Etats-Unis".
* @param inLocale Specifies the locale to be used to display the name. In other
* words, if the locale's country code is "US", passing
* Locale::FRENCH for inLocale would result in "<22>tats-Unis", while
* passing Locale::GERMAN for inLocale would result in
* "Vereinigte Staaten".
* @param dispCountry Receives the country's display name.
* @return A reference to "dispCountry".
*/
UnicodeString& getDisplayCountry( const Locale& inLocale,
UnicodeString& dispCountry) const;
/**
* Fills in "dispVar" with the name of this locale's variant code in a format suitable
* for user display in the default locale.
* @param dispVar Receives the variant's name.
* @return A reference to "dispVar".
*/
UnicodeString& getDisplayVariant( UnicodeString& dispVar) const;
/**
* Fills in "dispVar" with the name of this locale's variant code in a format
* suitable for user display in the locale specified by "inLocale".
* @param inLocale Specifies the locale to be used to display the name.
* @param dispVar Receives the variant's display name.
* @return A reference to "dispVar".
*/
UnicodeString& getDisplayVariant( const Locale& inLocale,
UnicodeString& dispVar) const;
/**
* Fills in "name" with the name of this locale in a format suitable for user display
* in the default locale. This function uses getDisplayLanguage(), getDisplayCountry(),
* and getDisplayVariant() to do its work, and outputs the display name in the format
* "language (country[,variant])". For example, if the default locale is en_US, then
* fr_FR's display name would be "French (France)", and es_MX_Traditional's display name
* would be "Spanish (Mexico,Traditional)".
* @param name Receives the locale's display name.
* @return A reference to "name".
*/
UnicodeString& getDisplayName( UnicodeString& name) const;
/**
* Fills in "name" with the name of this locale in a format suitable for user display
* in the locale specfied by "inLocale". This function uses getDisplayLanguage(),
* getDisplayCountry(), and getDisplayVariant() to do its work, and outputs the display
* name in the format "language (country[,variant])". For example, if inLocale is
* fr_FR, then en_US's display name would be "Anglais (<28>tats-Unis)", and no_NO_NY's
* display name would be "norv<72>gien (Norv<72>ge,NY)".
* @param inLocale Specifies the locale to be used to display the name.
* @param name Receives the locale's display name.
* @return A reference to "name".
*/
UnicodeString& getDisplayName( const Locale& inLocale,
UnicodeString& name) const;
/**
* Generates a hash code for the locale. Since Locales are often used in hashtables,
* caches the value for speed.
*/
t_int32 hashCode() const;
/**
* Retuns a list of all installed locales.
* @param count Receives the number of locales in the list.
* @return A pointer to an array of Locale objects. This array is the list
* of all locales with installed resource files. The called does NOT
* get ownership of this list, and must NOT delete it.
*/
static const Locale* getAvailableLocales(t_int32& count);
/**
* Get the path to the ResourceBundle locale files. This path will be a
* platform-specific path name ending in a directory separator, so that file
* names may be concatenated to it. This path may be changed by calling
* setDataDirectory(). If setDataDirectory() has not been called yet,
* getDataDirectory() will return a platform-dependent default path as
* specified by TPlatformUtilities::getDefaultDataDirectory().
*
* @return Current data path.
*/
static const char* getDataDirectory();
/**
* Set the path to the ResourceBundle locale files. After making this call,
* all objects in the Unicode Analytics package will read ResourceBundle
* data files in the specified directory in order to obtain locale data.
*
* @param path The new data path to be set to.
*/
static void setDataDirectory(const char* path);
/**
* Performs the functions necessary to terminate the library.
*/
static void terminateLibrary(void);
private:
enum EPOSIXPortion {
LANGUAGE,
COUNTRY,
VARIANT
};
static void parsePOSIXID(const UnicodeString& str,
UnicodeString& result,
EPOSIXPortion part);
private:
// These strings describe the resources we attempt to load from
// the locale ResourceBundle data file.
static const char* kLocaleString;
static const char* kShortLanguage;
static const char* kShortCountry;
static const char* kLocaleID;
static const char* kLanguages;
static const char* kCountries;
// The default locale we use if we can't get one from the host.
static const char* kDefaultLocaleOfLastResort;
static Locale defaultLocale;
static Locale* localeList;
static t_int32 localeListCount;
static char* fgDataDirectory;
UnicodeString id;
};
#ifdef NLS_MAC
#pragma export off
#endif
inline t_int32
Locale::hashCode() const
{
return( id.hashCode() );
}
inline t_bool
Locale::operator==( const Locale& other) const
{
return (this == &other || id == other.id);
}
inline t_bool
Locale::operator!=(const Locale& other) const
{
return !operator==(other);
}
#endif
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