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/*
* tkMacOSXKeyboard.c --
*
* Routines to support keyboard events on the Macintosh.
*
* Copyright (c) 1995-1997 Sun Microsystems, Inc.
* Copyright 2001, Apple Computer, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* RCS: @(#) $Id: tkMacOSXKeyboard.c,v 1.9 2003/12/15 16:37:39 cc_benny Exp $
*/
#include "tkInt.h"
#include "X11/Xlib.h"
#include "X11/keysym.h"
#include <Carbon/Carbon.h>
#include "tkMacOSXInt.h"
#include "tkMacOSXEvent.h" /* TkMacOSXKeycodeToUnicode() FIXME: That
* function should probably move here. */
/*
* A couple of simple definitions to make code a bit more self-explaining.
*
* For the assignments of Mod1==alt==command and Mod2==meta==option, see also
* tkMacOSXMouseEvent.c.
*/
#define LATIN1_MAX 255
#define MAC_KEYCODE_MAX 0x7F
#define ALT_MASK Mod1Mask
#define OPTION_MASK Mod2Mask
/*
* Tables enumerating the special keys defined on Mac keyboards. These are
* necessary for correct keysym mappings for all keys where the keysyms are
* not identical with their ASCII or Latin-1 code points.
*/
typedef struct {
int keycode; /* Macintosh keycode. */
KeySym keysym; /* X windows keysym. */
} KeyInfo;
/*
* Notes on keyArray:
*
* 0x34, XK_Return - Powerbooks use this and some keymaps define it.
*
* 0x4C, XK_Return - XFree86 and Apple's X11 call this one XK_KP_Enter.
*
* 0x47, XK_Clear - This key is NumLock when used on PCs, but Mac
* applications don't use it like that, nor does Apple's X11.
*
* All other keycodes are taken from the published ADB keyboard layouts.
*/
static KeyInfo keyArray[] = {
{0x24, XK_Return},
{0x30, XK_Tab},
{0x33, XK_BackSpace},
{0x34, XK_Return},
{0x35, XK_Escape},
{0x47, XK_Clear},
{0x4C, XK_Return},
{0x72, XK_Help},
{0x73, XK_Home},
{0x74, XK_Page_Up},
{0x75, XK_Delete},
{0x77, XK_End},
{0x79, XK_Page_Down},
{0x7B, XK_Left},
{0x7C, XK_Right},
{0x7D, XK_Down},
{0x7E, XK_Up},
{0, 0}
};
static KeyInfo virtualkeyArray[] = {
{122, XK_F1},
{120, XK_F2},
{99, XK_F3},
{118, XK_F4},
{96, XK_F5},
{97, XK_F6},
{98, XK_F7},
{100, XK_F8},
{101, XK_F9},
{109, XK_F10},
{103, XK_F11},
{111, XK_F12},
{105, XK_F13},
{107, XK_F14},
{113, XK_F15},
{0, 0}
};
static int initialized = 0;
static Tcl_HashTable keycodeTable; /* keyArray hashed by keycode value. */
static Tcl_HashTable vkeyTable; /* virtualkeyArray hashed by virtual
* keycode value. */
/*
* Prototypes for static functions used in this file.
*/
static void InitKeyMaps (void);
/*
*----------------------------------------------------------------------
*
* InitKeyMaps --
*
* Creates hash tables used by some of the functions in this file.
*
* FIXME: As keycodes are defined to be in the limited range 0-127, it
* would be easier and more efficient to use directly initialized plain
* arrays and drop this function.
*
* Results:
* None.
*
* Side effects:
* Allocates memory & creates some hash tables.
*
*----------------------------------------------------------------------
*/
static void
InitKeyMaps()
{
Tcl_HashEntry *hPtr;
KeyInfo *kPtr;
int dummy;
Tcl_InitHashTable(&keycodeTable, TCL_ONE_WORD_KEYS);
for (kPtr = keyArray; kPtr->keycode != 0; kPtr++) {
hPtr = Tcl_CreateHashEntry(&keycodeTable, (char *) kPtr->keycode,
&dummy);
Tcl_SetHashValue(hPtr, kPtr->keysym);
}
Tcl_InitHashTable(&vkeyTable, TCL_ONE_WORD_KEYS);
for (kPtr = virtualkeyArray; kPtr->keycode != 0; kPtr++) {
hPtr = Tcl_CreateHashEntry(&vkeyTable, (char *) kPtr->keycode,
&dummy);
Tcl_SetHashValue(hPtr, kPtr->keysym);
}
initialized = 1;
}
/*
*----------------------------------------------------------------------
*
* XKeycodeToKeysym --
*
* Translate from a system-dependent keycode to a system-independent
* keysym.
*
* Results:
* Returns the translated keysym, or NoSymbol on failure.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
KeySym
XKeycodeToKeysym(
Display* display,
KeyCode keycode,
int index)
{
register Tcl_HashEntry *hPtr;
int c;
int virtualKey;
int newKeycode;
UniChar newChar;
(void) display; /*unused*/
if (!initialized) {
InitKeyMaps();
}
if (keycode == 0) {
/*
* This means we had a pure modifier keypress or something similar
* which is a TO DO.
*/
return NoSymbol;
}
virtualKey = keycode >> 16;
c = keycode & 0xFFFF;
if (c > MAC_KEYCODE_MAX) {
return NoSymbol;
}
/*
* When determining what keysym to produce we first check to see if the
* key is a function key. We then check to see if the character is
* another non-printing key. Finally, we return the key syms for all
* ASCII and Latin-1 chars.
*/
if (c == 0x10) {
hPtr = Tcl_FindHashEntry(&vkeyTable, (char *) virtualKey);
if (hPtr != NULL) {
return (KeySym) Tcl_GetHashValue(hPtr);
}
}
hPtr = Tcl_FindHashEntry(&keycodeTable, (char *) virtualKey);
if (hPtr != NULL) {
return (KeySym) Tcl_GetHashValue(hPtr);
}
/*
* Add in the Mac modifier flags for shift and option.
*/
newKeycode = virtualKey;
if (index & 1) {
newKeycode |= shiftKey;
}
if (index & 2) {
newKeycode |= optionKey;
}
newChar = 0;
TkMacOSXKeycodeToUnicode(
&newChar, 1, kEventRawKeyDown,
newKeycode & 0x00FF, newKeycode & 0xFF00, NULL);
/*
* X11 keysyms are identical to Unicode for ASCII and Latin-1. Give up
* for other characters for now.
*/
if ((newChar >= XK_space) && (newChar <= LATIN1_MAX)) {
return newChar;
}
return NoSymbol;
}
/*
*----------------------------------------------------------------------
*
* TkpGetString --
*
* Retrieve the string equivalent for the given keyboard event.
*
* Results:
* Returns the UTF string.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
char *
TkpGetString(
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. */
{
(void) winPtr; /*unused*/
Tcl_DStringInit(dsPtr);
return Tcl_DStringAppend(dsPtr, eventPtr->xkey.trans_chars, -1);
}
/*
*----------------------------------------------------------------------
*
* XGetModifierMapping --
*
* Fetch the current keycodes used as modifiers.
*
* Results:
* Returns a new modifier map.
*
* Side effects:
* Allocates a new modifier map data structure.
*
*----------------------------------------------------------------------
*/
XModifierKeymap *
XGetModifierMapping(
Display* display)
{
XModifierKeymap * modmap;
(void) display; /*unused*/
/*
* MacOSX doesn't use the key codes for the modifiers for anything, and
* we don't generate them either. So there is no modifier map.
*/
modmap = (XModifierKeymap *) ckalloc(sizeof(XModifierKeymap));
modmap->max_keypermod = 0;
modmap->modifiermap = NULL;
return modmap;
}
/*
*----------------------------------------------------------------------
*
* XFreeModifiermap --
*
* Deallocate a modifier map that was created by XGetModifierMapping.
*
* Results:
* None.
*
* Side effects:
* Frees the datastructure referenced by modmap.
*
*----------------------------------------------------------------------
*/
void
XFreeModifiermap(
XModifierKeymap *modmap)
{
if (modmap->modifiermap != NULL) {
ckfree((char *) modmap->modifiermap);
}
ckfree((char *) modmap);
}
/*
*----------------------------------------------------------------------
*
* XKeysymToString, XStringToKeysym --
*
* These X window functions map keysyms to strings & strings to keysyms.
* However, Tk already does this for the most common keysyms.
* Therefore, these functions only need to support keysyms that will be
* specific to the Macintosh. Currently, there are none.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
char *
XKeysymToString(
KeySym keysym)
{
return NULL;
}
KeySym
XStringToKeysym(
const char* string)
{
return NoSymbol;
}
/*
*----------------------------------------------------------------------
*
* XKeysymToKeycode --
*
* The function XKeysymToKeycode takes an X11 keysym and converts it
* into a Mac keycode. It is in the stubs table for compatibility but
* not used anywhere in the core.
*
* Results:
* A 32 bit keycode with the the mac keycode but without modifiers in
* the higher 16 bits and the keysym in the lower 16 bits.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
KeyCode
XKeysymToKeycode(
Display* display,
KeySym keysym)
{
KeyCode keycode = 0;
char virtualKeyCode = 0;
(void) display; /*unused*/
if ((keysym >= XK_space) && (XK_asciitilde)) {
if (keysym == 'a') {
virtualKeyCode = 0x00;
} else if (keysym == 'b' || keysym == 'B') {
virtualKeyCode = 0x0B;
} else if (keysym == 'c') {
virtualKeyCode = 0x08;
} else if (keysym == 'x' || keysym == 'X') {
virtualKeyCode = 0x07;
} else if (keysym == 'z') {
virtualKeyCode = 0x06;
} else if (keysym == ' ') {
virtualKeyCode = 0x31;
} else if (keysym == XK_Return) {
virtualKeyCode = 0x24;
keysym = '\r';
}
keycode = keysym + (virtualKeyCode <<16);
}
return keycode;
}
/*
*----------------------------------------------------------------------
*
* TkpSetKeycodeAndState --
*
* The function TkpSetKeycodeAndState takes a keysym and fills in the
* appropriate members of an XEvent. It is similar to XKeysymToKeycode,
* but it also sets the modifier mask in the XEvent. It is used by
* [event generate] and it is in the stubs table.
*
* Results:
* Fills an XEvent, sets the member xkey.keycode with a keycode
* formatted the same as XKeysymToKeycode and the member xkey.state with
* the modifiers implied by the keysym.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
TkpSetKeycodeAndState(
Tk_Window tkwin,
KeySym keysym,
XEvent *eventPtr)
{
Display *display;
int state;
KeyCode keycode;
display = Tk_Display(tkwin);
if (keysym == NoSymbol) {
keycode = 0;
} else {
keycode = XKeysymToKeycode(display, keysym);
}
if (keycode != 0) {
for (state = 0; state < 4; state++) {
if (XKeycodeToKeysym(display, keycode, state) == keysym) {
if (state & 1) {
eventPtr->xkey.state |= ShiftMask;
}
if (state & 2) {
eventPtr->xkey.state |= OPTION_MASK;
}
break;
}
}
}
eventPtr->xkey.keycode = keycode;
}
/*
*----------------------------------------------------------------------
*
* TkpGetKeySym --
*
* Given an X KeyPress or KeyRelease event, map the keycode in the event
* into a keysym.
*
* Results:
* The return value is the keysym corresponding to eventPtr, or NoSymbol
* if no matching keysym could be found.
*
* Side effects:
* In the first call for a given display, keycode-to-keysym maps get
* loaded.
*
*----------------------------------------------------------------------
*/
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;
if (eventPtr->xkey.state & OPTION_MASK) {
index |= 2;
}
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;
}
/*
*--------------------------------------------------------------
*
* TkpInitKeymapInfo --
*
* This procedure is invoked to scan keymap information to recompute
* stuff that's important for binding, such as the modifier key (if any)
* that corresponds to the "Mode_switch" keysym.
*
* Results:
* None.
*
* Side effects:
* Keymap-related information in dispPtr is updated.
*
*--------------------------------------------------------------
*/
void
TkpInitKeymapInfo(
TkDisplay *dispPtr) /* Display for which to recompute keymap
* information. */
{
dispPtr->bindInfoStale = 0;
/*
* Behaviours that are variable on X11 are defined constant on MacOSX.
* lockUsage is only used above in TkpGetKeySym(), nowhere else
* currently. There is no offical "Mode_switch" key.
*/
dispPtr->lockUsage = LU_CAPS;
dispPtr->modeModMask = 0;
dispPtr->altModMask = ALT_MASK;
dispPtr->metaModMask = OPTION_MASK;
/*
* MacOSX doesn't use the keycodes for the modifiers for anything, and we
* don't generate them either (the keycodes actually given in the
* simulated modifier events are bogus). So there is no modifier map.
* If we ever want to simulate real modifier keycodes, the list will be
* constant on Carbon.
*/
if (dispPtr->modKeyCodes != NULL) {
ckfree((char *) dispPtr->modKeyCodes);
}
dispPtr->numModKeyCodes = 0;
dispPtr->modKeyCodes = NULL;
}
|