XSetLocaleModifiers(3)

NAME

   XSupportsLocale, XSetLocaleModifiers - determine locale support and
   configure locale modifiers

SYNTAX

   Bool XSupportsLocale(void);

   char *XSetLocaleModifiers(char *modifier_list);

ARGUMENTS

   modifier_list
             Specifies the modifiers.

DESCRIPTION

   The XSupportsLocale function returns True if Xlib functions are capable
   of operating under the current locale.  If it returns False, Xlib
   locale-dependent functions for which the XLocaleNotSupported return
   status is defined will return XLocaleNotSupported.  Other Xlib locale-
   dependent routines will operate in the ``C'' locale.

   The XSetLocaleModifiers function sets the X modifiers for the current
   locale setting.  The modifier_list argument is a null-terminated string
   of the form ``{@category=value}'', that is, having zero or more
   concatenated ``@category=value'' entries, where category is a category
   name and value is the (possibly empty) setting for that category.  The
   values are encoded in the current locale.  Category names are
   restricted to the POSIX Portable Filename Character Set.

   The local host X locale modifiers announcer (on POSIX-compliant
   systems, the XMODIFIERS environment variable) is appended to the
   modifier_list to provide default values on the local host.  If a given
   category appears more than once in the list, the first setting in the
   list is used.  If a given category is not included in the full modifier
   list, the category is set to an implementation-dependent default for
   the current locale.  An empty value for a category explicitly specifies
   the implementation-dependent default.

   If the function is successful, it returns a pointer to a string.  The
   contents of the string are such that a subsequent call with that string
   (in the same locale) will restore the modifiers to the same settings.
   If modifier_list is a NULL pointer, XSetLocaleModifiers also returns a
   pointer to such a string, and the current locale modifiers are not
   changed.

   If invalid values are given for one or more modifier categories
   supported by the locale, a NULL pointer is returned, and none of the
   current modifiers are changed.

   At program startup, the modifiers that are in effect are unspecified
   until the first successful call to set them.  Whenever the locale is
   changed, the modifiers that are in effect become unspecified until the
   next successful call to set them.  Clients should always call
   XSetLocaleModifiers with a non-NULL modifier_list after setting the
   locale before they call any locale-dependent Xlib routine.

   The only standard modifier category currently defined is ``im'', which
   identifies the desired input method.  The values for input method are
   not standardized.  A single locale may use multiple input methods,
   switching input method under user control.  The modifier may specify
   the initial input method in effect or an ordered list of input methods.
   Multiple input methods may be specified in a single im value string in
   an implementation-dependent manner.

   The returned modifiers string is owned by Xlib and should not be
   modified or freed by the client.  It may be freed by Xlib after the
   current locale or modifiers are changed.  Until freed, it will not be
   modified by Xlib.

SEE ALSO

   Xlib - C Language X Interface

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