Wt::WLocalizedStrings Class Reference

An abstract class that provides support for localized strings. More...

#include <Wt/WLocalizedStrings>

Inheritance diagram for Wt::WLocalizedStrings:

Public Member Functions
virtual	~WLocalizedStrings ()
	Destructor.
virtual void	refresh ()
	Rereads the message resources. More...
virtual void	hibernate ()
	Purges memory resources, if possible. More...
virtual bool	resolveKey (const std::string &key, std::string &result)=0
	Resolves a key in the current locale. More...
virtual bool	resolvePluralKey (const std::string &key, std::string &result,::uint64_t amount)
	Resolves the plural form of a key in the current locale. More...

Static Public Member Functions
static int	evaluatePluralExpression (const std::string &expression,::uint64_t n)
	Utility method to evaluate a plural expression. More...

Detailed Description

An abstract class that provides support for localized strings.

This abstract class provides the content to localized WStrings, by resolving the key to a string using the current application locale.

See also

WString::tr(), WApplication::setLocalizedStrings()

Member Function Documentation

int Wt::WLocalizedStrings::evaluatePluralExpression ( const std::string &  expression, ::uint64_t  n  )

static

Utility method to evaluate a plural expression.

This evaluates C expressions such as used by ngettext for a particular value, which can be useful to implement plural key resolution.

See also

resolvePluralKey()

void Wt::WLocalizedStrings::hibernate ( )

virtual

Purges memory resources, if possible.

This is called afer event handling, and is an opportunity to conserve memory inbetween events, by freeing memory used for cached key/value bindings, if applicable.

The default implementation does nothing.

Reimplemented in Wt::WMessageResourceBundle, and Wt::WCombinedLocalizedStrings.

void Wt::WLocalizedStrings::refresh ( )

virtual

Rereads the message resources.

Purge any cached key/values, if applicable.

The default implementation does nothing.

Reimplemented in Wt::WMessageResourceBundle, and Wt::WCombinedLocalizedStrings.

virtual bool Wt::WLocalizedStrings::resolveKey ( const std::string &  key, std::string &  result  )

pure virtual

Resolves a key in the current locale.

This method is used by WString to obtain the UTF8 value corresponding to a key in the current locale.

Returns true if the key could be resolved. The value is written in result, encoded using UTF8.

See also

WApplication::locale(), WString::tr()

Implemented in Wt::WMessageResourceBundle, and Wt::WCombinedLocalizedStrings.

bool Wt::WLocalizedStrings::resolvePluralKey ( const std::string &  key, std::string &  result, ::uint64_t  amount  )

virtual

Resolves the plural form of a key in the current locale.

This method is used by WString to obtain the UTF8 value corresponding to a key in the current locale, taking into account the possibility of multiple plural forms, and chosing the right plural form based on the amount passed.

Throws a std::logic_error if the underlying implementation does not provide support for plural internationalized strings.

Returns true if the key could be resolved. The value is written in result, encoded as UTF8.

See also

WApplication::locale(), WString::trn()

Reimplemented in Wt::WMessageResourceBundle, and Wt::WCombinedLocalizedStrings.