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/*
* tkUnixKey.c --
*
* This file contains routines for dealing with international keyboard
* input.
*
* Copyright (c) 1997 by Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* RCS: @(#) $Id: tkUnixKey.c,v 1.3 1999/12/16 21:59:13 hobbs Exp $
*/
#include "tkInt.h"
/*
*----------------------------------------------------------------------
*
* TkpGetString --
*
* Retrieve the UTF string associated with a keyboard event.
*
* Results:
* Returns the UTF string.
*
* Side effects:
* Stores the input string in the specified Tcl_DString. Modifies
* the internal input state. This routine can only be called
* once for a given event.
*
*----------------------------------------------------------------------
*/
char *
TkpGetString(winPtr, eventPtr, dsPtr)
TkWindow *winPtr; /* Window where event occurred: needed to
* get input context. */
XEvent *eventPtr; /* X keyboard event. */
Tcl_DString *dsPtr; /* Uninitialized or empty string to hold
* result. */
{
int len;
Tcl_DString buf;
Status status;
/*
* Overallocate the dstring to the maximum stack amount.
*/
Tcl_DStringInit(&buf);
Tcl_DStringSetLength(&buf, TCL_DSTRING_STATIC_SIZE-1);
#ifdef TK_USE_INPUT_METHODS
if (winPtr->dispPtr->useInputMethods
&& (winPtr->inputContext != NULL)
&& (eventPtr->type == KeyPress)) {
len = XmbLookupString(winPtr->inputContext, &eventPtr->xkey,
Tcl_DStringValue(&buf), Tcl_DStringLength(&buf),
(KeySym *) NULL, &status);
/*
* If the buffer wasn't big enough, grow the buffer and try again.
*/
if (status == XBufferOverflow) {
Tcl_DStringSetLength(&buf, len);
len = XmbLookupString(winPtr->inputContext, &eventPtr->xkey,
Tcl_DStringValue(&buf), len, (KeySym *) NULL, &status);
}
if ((status != XLookupChars) && (status != XLookupBoth)) {
len = 0;
}
} else {
len = XLookupString(&eventPtr->xkey, Tcl_DStringValue(&buf),
Tcl_DStringLength(&buf), (KeySym *) NULL,
(XComposeStatus *) NULL);
}
#else /* TK_USE_INPUT_METHODS */
len = XLookupString(&eventPtr->xkey, Tcl_DStringValue(&buf),
Tcl_DStringLength(&buf), (KeySym *) NULL,
(XComposeStatus *) NULL);
#endif /* TK_USE_INPUT_METHODS */
Tcl_DStringSetLength(&buf, len);
Tcl_ExternalToUtfDString(NULL, Tcl_DStringValue(&buf), len, dsPtr);
Tcl_DStringFree(&buf);
return Tcl_DStringValue(dsPtr);
}
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