KeySym
TkpGetKeySym(
TkDisplay *dispPtr, /* Display in which to map keycode. */
XEvent *eventPtr) /* Description of X event. */
{
KeySym sym;
int index;
TkKeyEvent* kePtr = (TkKeyEvent*) eventPtr;
#ifdef TK_USE_INPUT_METHODS
/*
* If input methods are active, we may already have determined a keysym.
* Return it.
*/
if (eventPtr->type == KeyPress && dispPtr
&& (dispPtr->flags & TK_DISPLAY_USE_IM)) {
if (kePtr->charValuePtr == NULL) {
Tcl_DString ds;
TkWindow *winPtr = (TkWindow *)
Tk_IdToWindow(eventPtr->xany.display, eventPtr->xany.window);
Tcl_DStringInit(&ds);
(void) TkpGetString(winPtr, eventPtr, &ds);
Tcl_DStringFree(&ds);
}
if (kePtr->charValuePtr != NULL) {
return kePtr->keysym;
}
}
#endif
/*
* Refresh the mapping information if it's stale
*/
if (dispPtr->bindInfoStale) {
TkpInitKeymapInfo(dispPtr);
}
/*
* Figure out which of the four slots in the keymap vector to use for this
* key. Refer to Xlib documentation for more info on how this computation
* works.
*/
index = 0;
if (eventPtr->xkey.state & dispPtr->modeModMask) {
index = 2;
}
if ((eventPtr->xkey.state & ShiftMask)
|| ((dispPtr->lockUsage != LU_IGNORE)
&& (eventPtr->xkey.state & LockMask))) {
index += 1;
}
sym = XkbKeycodeToKeysym(dispPtr->display, eventPtr->xkey.keycode, 0,
index);
/*
* Special handling: if the key was shifted because of Lock, but lock is
* only caps lock, not shift lock, and the shifted keysym isn't upper-case
* alphabetic, then switch back to the unshifted keysym.
*/
if ((index & 1) && !(eventPtr->xkey.state & ShiftMask)
&& (dispPtr->lockUsage == LU_CAPS)) {
if (!(((sym >= XK_A) && (sym <= XK_Z))
|| ((sym >= XK_Agrave) && (sym <= XK_Odiaeresis))
|| ((sym >= XK_Ooblique) && (sym <= XK_Thorn)))) {
index &= ~1;
sym = XkbKeycodeToKeysym(dispPtr->display, eventPtr->xkey.keycode,
0, index);
}
}
/*
* Another bit of special handling: if this is a shifted key and there is
* no keysym defined, then use the keysym for the unshifted key.
*/
if ((index & 1) && (sym == NoSymbol)) {
sym = XkbKeycodeToKeysym(dispPtr->display, eventPtr->xkey.keycode,
0, index & ~1);
}
return sym;
}
KeySym
TkpGetKeySym(
TkDisplay *dispPtr, /* Display in which to map keycode. */
XEvent *eventPtr) /* Description of X event. */
{
KeySym sym;
int index;
/*
* Refresh the mapping information if it's stale.
*/
if (dispPtr->bindInfoStale) {
TkpInitKeymapInfo(dispPtr);
}
/*
* Handle pure modifier keys specially. We use -1 as a signal for
* this.
*/
if (eventPtr->xany.send_event == -1) {
int modifier = eventPtr->xkey.keycode;
if (modifier == cmdKey) {
return XK_Alt_L;
} else if (modifier == shiftKey) {
return XK_Shift_L;
} else if (modifier == alphaLock) {
return XK_Caps_Lock;
} else if (modifier == optionKey) {
return XK_Meta_L;
} else if (modifier == controlKey) {
return XK_Control_L;
} else if (modifier == rightShiftKey) {
return XK_Shift_R;
} else if (modifier == rightOptionKey) {
return XK_Meta_R;
} else if (modifier == rightControlKey) {
return XK_Control_R;
} else {
/*
* If we get here, we probably need to implement something new.
*/
return NoSymbol;
}
}
/*
* Figure out which of the four slots in the keymap vector to use for
* this key. Refer to Xlib documentation for more info on how this
* computation works. (Note: We use "Option" in keymap columns 2 and 3
* where other implementations have "Mode_switch".)
*/
index = 0;
/*
* We want Option key combinations to use their base chars as keysyms, so
* we ignore the option modifier here.
*/
#if 0
if (eventPtr->xkey.state & OPTION_MASK) {
index |= 2;
}
#endif
if ((eventPtr->xkey.state & ShiftMask)
|| (/* (dispPtr->lockUsage != LU_IGNORE)
&& */ (eventPtr->xkey.state & LockMask))) {
index |= 1;
}
/*
* First try of the actual translation.
*/
sym = XKeycodeToKeysym(dispPtr->display, eventPtr->xkey.keycode, index);
/*
* Special handling: If the key was shifted because of Lock, but lock is
* only caps lock, not shift lock, and the shifted keysym isn't
* upper-case alphabetic, then switch back to the unshifted keysym.
*/
if ((index & 1) && !(eventPtr->xkey.state & ShiftMask)
/*&& (dispPtr->lockUsage == LU_CAPS)*/ ) {
/*
* FIXME: Keysyms are only identical to Unicode for ASCII and
* Latin-1, so we can't use Tcl_UniCharIsUpper() for keysyms outside
* that range. This may be a serious problem here.
*/
if ((sym == NoSymbol) || (sym > LATIN1_MAX)
|| !Tcl_UniCharIsUpper(sym)) {
index &= ~1;
sym = XKeycodeToKeysym(dispPtr->display, eventPtr->xkey.keycode,
index);
}
}
/*
* Another bit of special handling: If this is a shifted key and there is
* no keysym defined, then use the keysym for the unshifted key.
*/
if ((index & 1) && (sym == NoSymbol)) {
sym = XKeycodeToKeysym(dispPtr->display, eventPtr->xkey.keycode,
index & ~1);
}
return sym;
}
