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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