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XSupportsLocale(3) XLIB FUNCTIONS XSupportsLocale(3)
NAME
XSupportsLocale, XSetLocaleModifiers - determine locale support and configure locale modi-
fiers
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 cat-
egory 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 File-
name 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 cat-
egory 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, XSetLocaleModi-
fiers 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 suc-
cessful 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. Mul-
tiple 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
X Version 11 libX11 1.2.1 XSupportsLocale(3) |
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