XSupportsLocale(3) XLIB FUNCTIONS XSupportsLocale(3)
NAME
XSupportsLocale, XSetLocaleModifiers - determine locale support and con-
figure locale modifiers
SYNTAX
Bool XSupportsLocale(void);
char *XSetLocaleModifiers(_Xconst 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 lo-
cale-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 concate-
nated “@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 sup-
ported by the locale, a NULL pointer is returned, and none of the cur-
rent modifiers are changed.
At program startup, the modifiers that are in effect are unspecified un-
til 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 XSetLo-
caleModifiers with a non-NULL modifier_list after setting the locale be-
fore 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 modi-
fied 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
X Version 11 libX11 1.8.12 XSupportsLocale(3)
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