XmbLookupString(3X11)

NAME
XmbLookupString, XwcLookupString - obtain composed input from an input method

SYNTAX
int XmbLookupString(ic, event, buffer_return, bytes_buffer, keysym_return, status_return)
      XIC ic;
      XKeyPressedEvent *event;
      char *buffer_return;
      int bytes_buffer;
      KeySym *keysym_return;
      Status *status_return;

int XwcLookupString(ic, event, buffer_return, bytes_buffer, keysym_return, status_return)
      XIC ic;
      XKeyPressedEvent *event;
      wchar_t *buffer_return;
      int wchars_buffer;
      KeySym *keysym_return;
      Status *status_return;

ARGUMENTS

buffer_return
    Returns a multibyte string or wide character string (if any) from the input method.

bytes_buffer

wchars_buffer
    Specifies space available in return buffer.

event
    Specifies the key event to be used.

ic  Specifies the input context.

keysym_return
    Returns the KeySym computed from the event if this argument is not NULL.

status_return
    Returns a value indicating what kind of data is returned.

DESCRIPTION
The and functions return the string from the input method specified in the buffer_return argument. If no string is returned, the buffer_return argument is unchanged.

The KeySym into which the KeyCode from the event was mapped is returned in the keysym_return argument if it is non-NULL and the status_return argument indicates that a KeySym was returned. If both a string and a KeySym are returned, the KeySym value does not necessarily correspond to the string returned.

Note that returns the length of the string in bytes and that returns the length of the string in characters.

and return text in the encoding of the locale bound to the input method of the specified input context.

Note that each string returned by and begins in the initial state of the encoding of the locale (if the encoding of the locale is state-dependent). In order to insure proper input processing, it is essential that the client pass only events to and Their behavior when a client passes a event is undefined.

Clients should check the status_return argument before using the other returned values. These two functions both return a value to status_return that indicates what has been returned in the other arguments. The possible values returned are:
 | The input string to be returned is too large for the supplied buffer_return. The required size in bytes; in characters) is returned as the value of the function, and the contents of buffer_return and keysym_return are not modified. The client should recall the function with the same event and a buffer of adequate size in order to obtain the string.
 | No consistent input has been composed so far. The contents of buffer_return and keysym_return are not modified, and the function returns zero.
 | Some input characters have been composed. They are placed in the buffer_return argument, and the string length is returned as the value of the function. The string is encoded in the locale bound to the input context. The contents of the keysym_return argument is not modified.
 | A KeySym has been returned instead of a string and is returned in keysym_return. The contents of the buffer_return argument is not modified, and the function returns zero.
 | Both a KeySym and a string are returned; and occur simultaneously.

It does not make any difference if the input context passed as an argument to and is the one currently in possession of the focus or not. Input may have been composed within an input context before it lost the focus, and that input may be returned on subsequent calls to or even though it does not have any more keyboard focus.

SEE ALSO
XLookupKeysym(3X11)
Xlib - C Language X Interface