XSupportsLocale(3) XLIB FUNCTIONS XSupportsLocale(3)

NAME


XSupportsLocale, XSetLocaleModifiers - determine locale support and
configure 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 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

X Version 11 libX11 1.8.10 XSupportsLocale(3)

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