sdl_quartzevents.m

网络MPEG4IP流媒体开发源代码

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002    Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    [e-mail]
*/
#include <stdlib.h>	// For getenv()
#include "SDL_QuartzKeys.h"

static void     QZ_InitOSKeymap (_THIS) {
    const void *KCHRPtr;
    UInt32 state;
    UInt32 value;
    int i;
    int world = SDLK_WORLD_0;

    for ( i=0; i<SDL_TABLESIZE(keymap); ++i )
        keymap[i] = SDLK_UNKNOWN;

    /* This keymap is almost exactly the same as the OS 9 one */
    keymap[QZ_ESCAPE] = SDLK_ESCAPE;
    keymap[QZ_F1] = SDLK_F1;
    keymap[QZ_F2] = SDLK_F2;
    keymap[QZ_F3] = SDLK_F3;
    keymap[QZ_F4] = SDLK_F4;
    keymap[QZ_F5] = SDLK_F5;
    keymap[QZ_F6] = SDLK_F6;
    keymap[QZ_F7] = SDLK_F7;
    keymap[QZ_F8] = SDLK_F8;
    keymap[QZ_F9] = SDLK_F9;
    keymap[QZ_F10] = SDLK_F10;
    keymap[QZ_F11] = SDLK_F11;
    keymap[QZ_F12] = SDLK_F12;
    keymap[QZ_PRINT] = SDLK_PRINT;
    keymap[QZ_SCROLLOCK] = SDLK_SCROLLOCK;
    keymap[QZ_PAUSE] = SDLK_PAUSE;
    keymap[QZ_POWER] = SDLK_POWER;
    keymap[QZ_BACKQUOTE] = SDLK_BACKQUOTE;
    keymap[QZ_1] = SDLK_1;
    keymap[QZ_2] = SDLK_2;
    keymap[QZ_3] = SDLK_3;
    keymap[QZ_4] = SDLK_4;
    keymap[QZ_5] = SDLK_5;
    keymap[QZ_6] = SDLK_6;
    keymap[QZ_7] = SDLK_7;
    keymap[QZ_8] = SDLK_8;
    keymap[QZ_9] = SDLK_9;
    keymap[QZ_0] = SDLK_0;
    keymap[QZ_MINUS] = SDLK_MINUS;
    keymap[QZ_EQUALS] = SDLK_EQUALS;
    keymap[QZ_BACKSPACE] = SDLK_BACKSPACE;
    keymap[QZ_INSERT] = SDLK_INSERT;
    keymap[QZ_HOME] = SDLK_HOME;
    keymap[QZ_PAGEUP] = SDLK_PAGEUP;
    keymap[QZ_NUMLOCK] = SDLK_NUMLOCK;
    keymap[QZ_KP_EQUALS] = SDLK_KP_EQUALS;
    keymap[QZ_KP_DIVIDE] = SDLK_KP_DIVIDE;
    keymap[QZ_KP_MULTIPLY] = SDLK_KP_MULTIPLY;
    keymap[QZ_TAB] = SDLK_TAB;
    keymap[QZ_q] = SDLK_q;
    keymap[QZ_w] = SDLK_w;
    keymap[QZ_e] = SDLK_e;
    keymap[QZ_r] = SDLK_r;
    keymap[QZ_t] = SDLK_t;
    keymap[QZ_y] = SDLK_y;
    keymap[QZ_u] = SDLK_u;
    keymap[QZ_i] = SDLK_i;
    keymap[QZ_o] = SDLK_o;
    keymap[QZ_p] = SDLK_p;
    keymap[QZ_LEFTBRACKET] = SDLK_LEFTBRACKET;
    keymap[QZ_RIGHTBRACKET] = SDLK_RIGHTBRACKET;
    keymap[QZ_BACKSLASH] = SDLK_BACKSLASH;
    keymap[QZ_DELETE] = SDLK_DELETE;
    keymap[QZ_END] = SDLK_END;
    keymap[QZ_PAGEDOWN] = SDLK_PAGEDOWN;
    keymap[QZ_KP7] = SDLK_KP7;
    keymap[QZ_KP8] = SDLK_KP8;
    keymap[QZ_KP9] = SDLK_KP9;
    keymap[QZ_KP_MINUS] = SDLK_KP_MINUS;
    keymap[QZ_CAPSLOCK] = SDLK_CAPSLOCK;
    keymap[QZ_a] = SDLK_a;
    keymap[QZ_s] = SDLK_s;
    keymap[QZ_d] = SDLK_d;
    keymap[QZ_f] = SDLK_f;
    keymap[QZ_g] = SDLK_g;
    keymap[QZ_h] = SDLK_h;
    keymap[QZ_j] = SDLK_j;
    keymap[QZ_k] = SDLK_k;
    keymap[QZ_l] = SDLK_l;
    keymap[QZ_SEMICOLON] = SDLK_SEMICOLON;
    keymap[QZ_QUOTE] = SDLK_QUOTE;
    keymap[QZ_RETURN] = SDLK_RETURN;
    keymap[QZ_KP4] = SDLK_KP4;
    keymap[QZ_KP5] = SDLK_KP5;
    keymap[QZ_KP6] = SDLK_KP6;
    keymap[QZ_KP_PLUS] = SDLK_KP_PLUS;
    keymap[QZ_LSHIFT] = SDLK_LSHIFT;
    keymap[QZ_z] = SDLK_z;
    keymap[QZ_x] = SDLK_x;
    keymap[QZ_c] = SDLK_c;
    keymap[QZ_v] = SDLK_v;
    keymap[QZ_b] = SDLK_b;
    keymap[QZ_n] = SDLK_n;
    keymap[QZ_m] = SDLK_m;
    keymap[QZ_COMMA] = SDLK_COMMA;
    keymap[QZ_PERIOD] = SDLK_PERIOD;
    keymap[QZ_SLASH] = SDLK_SLASH;
    keymap[QZ_UP] = SDLK_UP;
    keymap[QZ_KP1] = SDLK_KP1;
    keymap[QZ_KP2] = SDLK_KP2;
    keymap[QZ_KP3] = SDLK_KP3;
    keymap[QZ_KP_ENTER] = SDLK_KP_ENTER;
    keymap[QZ_LCTRL] = SDLK_LCTRL;
    keymap[QZ_LALT] = SDLK_LALT;
    keymap[QZ_LMETA] = SDLK_LMETA;
    keymap[QZ_SPACE] = SDLK_SPACE;
    keymap[QZ_LEFT] = SDLK_LEFT;
    keymap[QZ_DOWN] = SDLK_DOWN;
    keymap[QZ_RIGHT] = SDLK_RIGHT;
    keymap[QZ_KP0] = SDLK_KP0;
    keymap[QZ_KP_PERIOD] = SDLK_KP_PERIOD;
    keymap[QZ_IBOOK_ENTER] = SDLK_KP_ENTER;
    keymap[QZ_IBOOK_RIGHT] = SDLK_RIGHT;
    keymap[QZ_IBOOK_DOWN] = SDLK_DOWN;
    keymap[QZ_IBOOK_UP]      = SDLK_UP;
    keymap[QZ_IBOOK_LEFT] = SDLK_LEFT;

    /* 
        Up there we setup a static scancode->keysym map. However, it will not
        work very well on international keyboard. Hence we now query MacOS
        for its own keymap to adjust our own mapping table. However, this is
        basically only useful for ascii char keys. This is also the reason
        why we keep the static table, too.
     */

    /* Get a pointer to the systems cached KCHR */
    KCHRPtr = (void *)GetScriptManagerVariable(smKCHRCache);
    if (KCHRPtr)
    {
        /* Loop over all 127 possible scan codes */
        for (i = 0; i < 0x7F; i++)
        {
            /* We pretend a clean start to begin with (i.e. no dead keys active */
            state = 0;

            /* Now translate the key code to a key value */
            value = KeyTranslate(KCHRPtr, i, &state) & 0xff;

            /* If the state become 0, it was a dead key. We need to translate again,
                passing in the new state, to get the actual key value */
            if (state != 0)
                value = KeyTranslate(KCHRPtr, i, &state) & 0xff;

            /* Now we should have an ascii value, or 0. Try to figure out to which SDL symbol it maps */
            if (value >= 128)     /* Some non-ASCII char, map it to SDLK_WORLD_* */
                keymap[i] = world++;
            else if (value >= 32)     /* non-control ASCII char */
                keymap[i] = value;
        }
    }

    /* 
        The keypad codes are re-setup here, because the loop above cannot
        distinguish between a key on the keypad and a regular key. We maybe
        could get around this problem in another fashion: NSEvent's flags
        include a "NSNumericPadKeyMask" bit; we could check that and modify
        the symbol we return on the fly. However, this flag seems to exhibit
        some weird behaviour related to the num lock key
    */
    keymap[QZ_KP0] = SDLK_KP0;
    keymap[QZ_KP1] = SDLK_KP1;
    keymap[QZ_KP2] = SDLK_KP2;
    keymap[QZ_KP3] = SDLK_KP3;
    keymap[QZ_KP4] = SDLK_KP4;
    keymap[QZ_KP5] = SDLK_KP5;
    keymap[QZ_KP6] = SDLK_KP6;
    keymap[QZ_KP7] = SDLK_KP7;
    keymap[QZ_KP8] = SDLK_KP8;
    keymap[QZ_KP9] = SDLK_KP9;
    keymap[QZ_KP_MINUS] = SDLK_KP_MINUS;
    keymap[QZ_KP_PLUS] = SDLK_KP_PLUS;
    keymap[QZ_KP_PERIOD] = SDLK_KP_PERIOD;
    keymap[QZ_KP_EQUALS] = SDLK_KP_EQUALS;
    keymap[QZ_KP_DIVIDE] = SDLK_KP_DIVIDE;
    keymap[QZ_KP_MULTIPLY] = SDLK_KP_MULTIPLY;
    keymap[QZ_KP_ENTER] = SDLK_KP_ENTER;
}

static void QZ_DoKey (_THIS, int state, NSEvent *event) {

    NSString *chars;
    int i;
    SDL_keysym key;

    /* 
        An event can contain multiple characters
        I'll ignore this fact for now, since there 
        is only one virtual key code per event, so
        no good way to handle this.
    */
    chars = [ event characters ];
    for (i =0; i < 1 /*[ chars length ] */; i++) {

        key.scancode = [ event keyCode ];
        key.sym         = keymap [ key.scancode ];
        key.unicode     = [ chars characterAtIndex:i];
        key.mod         = KMOD_NONE;

        SDL_PrivateKeyboard (state, &key);
    }
}

static void QZ_DoModifiers (_THIS, unsigned int newMods) {

    const int mapping[] = { SDLK_CAPSLOCK, SDLK_LSHIFT, SDLK_LCTRL, SDLK_LALT, SDLK_LMETA } ;

    int i;
    int bit;
    SDL_keysym key;

    key.scancode = 0;
    key.sym         = SDLK_UNKNOWN;
    key.unicode     = 0;
    key.mod         = KMOD_NONE;

    /* Iterate through the bits, testing each against the current modifiers */
    for (i = 0, bit = NSAlphaShiftKeyMask; bit <= NSCommandKeyMask; bit <<= 1, ++i) {

        unsigned int currentMask, newMask;

        currentMask = current_mods & bit;
        newMask     = newMods & bit;

        if ( currentMask &&
             currentMask != newMask ) {     /* modifier up event */

             key.sym = mapping[i];
             /* If this was Caps Lock, we need some additional voodoo to make SDL happy */
             if (bit == NSAlphaShiftKeyMask)
             SDL_PrivateKeyboard (SDL_PRESSED, &key);
             SDL_PrivateKeyboard (SDL_RELEASED, &key);
        }
        else if ( newMask &&
                  currentMask != newMask ) {     /* modifier down event */
        
             key.sym = mapping[i];