MirBSD manpage: XmbLookupString(3), Xutf8LookupString(3), XwcLookupString(3)

XmbLookupString(3X11)    XLIB FUNCTIONS     XmbLookupString(3X11)


     XmbLookupString, XwcLookupString, Xutf8LookupString - obtain
     composed input from an input method


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

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

     int Xutf8LookupString(XIC ic, XKeyPressedEvent *event, char
          *buffer_return, int bytes_buffer, KeySym
          *keysym_return, Status *status_return);


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

               Specifies space available in the return buffer.

     event     Specifies the key event to be used.

     ic        Specifies the input context.

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

               Returns a value indicating what kind of data is


     The XmbLookupString, XwcLookupString and Xutf8LookupString
     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

XFree86                   Version 4.5.0                         1

XmbLookupString(3X11)    XLIB FUNCTIONS     XmbLookupString(3X11)

     XmbLookupString and Xutf8LookupString return the length of
     the string in bytes, and XwcLookupString returns the length
     of the string in characters. Both XmbLookupString and
     XwcLookupString return text in the encoding of the locale
     bound to the input method of the specified input context,
     and Xutf8LookupString returns text in UTF-8 encoding.

     Each string returned by XmbLookupString and XwcLookupString
     begins in the initial state of the encoding of the locale
     (if the encoding of the locale is state-dependent).


          (Reg.)To ensure proper input processing, it is
          essential that the client pass only KeyPress
          events to XmbLookupString, XwcLookupString and
          Xutf8LookupString. Their behavior when a client
          passes a KeyRelease event is undefined.

     Clients should check the status_return argument before using
     the other returned values. These three functions each return
     a value to status_return that indicates what has been
     returned in the other arguments. The possible values
     returned are:
     XBufferOverflow   The input string to be returned is too
                       large for the supplied buffer_return. The
                       required size (for XmbLookupString,
                       Xutf8LookupString in bytes; for XwcLookup-
                       String 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 to obtain the string.
     XLookupNone       No consistent input has been composed so
                       far. The contents of buffer_return and
                       keysym_return are not modified, and the
                       function returns zero.
     XLookupChars      Some input characters have been composed.
                       They are placed in the buffer_return argu-
                       ment, using the encoding described above,
                       and the string length is returned as the
                       value of the function. The content of the
                       keysym_return argument is not modified.
     XLookupKeySym     A KeySym has been returned instead of a
                       string and is returned in keysym_return.
                       The content of the buffer_return argument
                       is not modified, and the function returns

XFree86                   Version 4.5.0                         2

XmbLookupString(3X11)    XLIB FUNCTIONS     XmbLookupString(3X11)

     XLookupBoth       Both a KeySym and a string are returned;
                       XLookupChars and XLookupKeySym occur simul-

     It does not make any difference if the input context passed
     as an argument to XmbLookupString, XwcLookupString and
     Xutf8LookupString 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 XmbLookupString, XwcLookup-
     String or Xutf8LookupString even though it does not have any
     more keyboard focus.

     The function Xutf8LookupString is an XFree86 extension
     introduced in XFree86 4.0.2. Its presence is indicated by
     the macro X_HAVE_UTF8_STRING.


     Xlib - C Language X Interface

XFree86                   Version 4.5.0                         3

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