/* * 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 1.16 2004/02/14 16:32:39 cc_benny Exp $ */ #include "tkInt.h" #include "X11/Xlib.h" #include "X11/keysym.h" #include #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 MAC_KEYCODE_MASK 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. */ static int latin1Table[LATIN1_MAX+1]; /* Reverse mapping table for * controls, ASCII and Latin-1. */ /* * Prototypes for static functions used in this file. */ static void InitKeyMaps (void); static void InitLatin1Table(Display *display); static int XKeysymToMacKeycode(Display *display, KeySym keysym); /* *---------------------------------------------------------------------- * * 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; } /* *---------------------------------------------------------------------- * * InitLatin1Table -- * * Creates a simple table to be used for mapping from keysyms to * keycodes. Always needs to be called before using latin1Table, * because the keyboard layout may have changed, and than the table must * be re-computed. * * Results: * None. * * Side effects: * Sets the global latin1Table. * *---------------------------------------------------------------------- */ static void InitLatin1Table( Display *display) { static Boolean latin1_initialized = false; static SInt16 lastKeyLayoutID = -1; SInt16 keyScript; SInt16 keyLayoutID; keyScript = GetScriptManagerVariable(smKeyScript); keyLayoutID = GetScriptVariable(keyScript,smScriptKeys); if (!latin1_initialized || (lastKeyLayoutID != keyLayoutID)) { int keycode; KeySym keysym; int state; int modifiers; latin1_initialized = true; lastKeyLayoutID = keyLayoutID; memset(latin1Table, 0, sizeof(latin1Table)); /* * In the common X11 implementations, a keymap has four columns * "plain", "Shift", "Mode_switch" and "Mode_switch + Shift". We * don't use "Mode_switch", but we use "Option" instead. (This is * similar to Apple's X11 implementation, where "Mode_switch" is used * as an alias for "Option".) * * So here we go through all 4 columns of the keymap and find all * Latin-1 compatible keycodes. We go through the columns * back-to-front from the more exotic columns to the more simple, so * that simple keycode-modifier combinations are preferred in the * resulting table. */ for (state = 3; state >= 0; state--) { modifiers = 0; if (state & 1) { modifiers |= shiftKey; } if (state & 2) { modifiers |= optionKey; } for (keycode = 0; keycode <= MAC_KEYCODE_MAX; keycode++) { keysym = XKeycodeToKeysym(display,keycode<<16,state); if (keysym <= LATIN1_MAX) { latin1Table[keysym] = keycode | modifiers; } } } } } /* *---------------------------------------------------------------------- * * 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 newKeycode; UniChar newChar; (void) display; /*unused*/ if (!initialized) { InitKeyMaps(); } /* * 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. */ newKeycode = keycode >> 16; if ((keycode & 0xFFFF) == 0x10) { hPtr = Tcl_FindHashEntry(&vkeyTable, (char *) newKeycode); if (hPtr != NULL) { return (KeySym) Tcl_GetHashValue(hPtr); } } hPtr = Tcl_FindHashEntry(&keycodeTable, (char *) newKeycode); if (hPtr != NULL) { return (KeySym) Tcl_GetHashValue(hPtr); } /* * Add in the Mac modifier flags for shift and option. */ 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; } /* *---------------------------------------------------------------------- * * XKeysymToMacKeycode -- * * An internal function like XKeysymToKeycode but only generating the * Mac specific keycode plus the modifiers Shift and Option. * * Results: * A Mac keycode with the actual keycode in the low byte and Mac-style * modifier bits in the high byte. * * Side effects: * None. * *---------------------------------------------------------------------- */ static int XKeysymToMacKeycode( Display *display, KeySym keysym) { if (keysym <= LATIN1_MAX) { /* * Handle keysyms in the Latin-1 range where keysym and Unicode * character code point are the same. */ InitLatin1Table(display); return latin1Table[keysym]; } else { /* * Handle special keys from our exception tables. Don't mind if this * is slow, neither the test suite nor [event generate] need to be * optimized (we hope). */ KeyInfo *kPtr; for (kPtr = keyArray; kPtr->keycode != 0; kPtr++) { if (kPtr->keysym == keysym) { return kPtr->keycode; } } for (kPtr = virtualkeyArray; kPtr->keycode != 0; kPtr++) { if (kPtr->keysym == keysym) { return kPtr->keycode; } } /* * For other keysyms (not Latin-1 and not special keys), we'd need a * generic keysym-to-unicode table. We don't have that, so we give * up here. */ return 0; } } /* *---------------------------------------------------------------------- * * 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 (without modifiers) in the * higher 16 bits of the keycode and the ASCII or Latin-1 code in the * lower 8 bits of the keycode. * * Side effects: * None. * *---------------------------------------------------------------------- */ KeyCode XKeysymToKeycode( Display* display, KeySym keysym) { int macKeycode = XKeysymToMacKeycode(display, keysym); KeyCode result; /* * See also TkpSetKeycodeAndState. The 0x0010 magic is used in * XKeycodeToKeysym. For special keys like XK_Return the lower 8 bits of * the keysym are usually a related ASCII control code. */ if ((keysym >= XK_F1) && (keysym <= XK_F35)) { result = 0x0010; } else { result = 0x00FF & keysym; } result |= (macKeycode & MAC_KEYCODE_MASK) << 16; return result; } /* NB: Keep this commented code for a moment for reference. 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. Also fills in xkey.trans_chars, * so that the actual characters can be retrieved later. * * Side effects: * None. * *---------------------------------------------------------------------- */ void TkpSetKeycodeAndState( Tk_Window tkwin, KeySym keysym, XEvent *eventPtr) { if (keysym == NoSymbol) { eventPtr->xkey.keycode = 0; } else { Display *display = Tk_Display(tkwin); int macKeycode = XKeysymToMacKeycode(display, keysym); /* * See also XKeysymToKeycode. */ if ((keysym >= XK_F1) && (keysym <= XK_F35)) { eventPtr->xkey.keycode = 0x0010; } else { eventPtr->xkey.keycode = 0x00FF & keysym; } eventPtr->xkey.keycode |= (macKeycode & MAC_KEYCODE_MASK) << 16; if (shiftKey & macKeycode) { eventPtr->xkey.state |= ShiftMask; } if (optionKey & macKeycode) { eventPtr->xkey.state |= OPTION_MASK; } if (keysym <= LATIN1_MAX) { int done; done = Tcl_UniCharToUtf(keysym,eventPtr->xkey.trans_chars); eventPtr->xkey.trans_chars[done] = 0; } else { eventPtr->xkey.trans_chars[0] = 0; } } } /* *---------------------------------------------------------------------- * * 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; /* * 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; } /* *-------------------------------------------------------------- * * 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 in the Carbon implementation. */ if (dispPtr->modKeyCodes != NULL) { ckfree((char *) dispPtr->modKeyCodes); } dispPtr->numModKeyCodes = 0; dispPtr->modKeyCodes = NULL; }