sdl_x11events.c

SDL库 在进行视频显示程序spcaview安装时必须的库文件

 	ODD_keymap[XK_dead_acute&0xFF] = SDLK_COMPOSE;
 	ODD_keymap[XK_dead_tilde&0xFF] = SDLK_COMPOSE;
 	ODD_keymap[XK_dead_macron&0xFF] = SDLK_COMPOSE;
 	ODD_keymap[XK_dead_breve&0xFF] = SDLK_COMPOSE;
 	ODD_keymap[XK_dead_abovedot&0xFF] = SDLK_COMPOSE;
 	ODD_keymap[XK_dead_diaeresis&0xFF] = SDLK_COMPOSE;
 	ODD_keymap[XK_dead_abovering&0xFF] = SDLK_COMPOSE;
 	ODD_keymap[XK_dead_doubleacute&0xFF] = SDLK_COMPOSE;
 	ODD_keymap[XK_dead_caron&0xFF] = SDLK_COMPOSE;
 	ODD_keymap[XK_dead_cedilla&0xFF] = SDLK_COMPOSE;
 	ODD_keymap[XK_dead_ogonek&0xFF] = SDLK_COMPOSE;
 	ODD_keymap[XK_dead_iota&0xFF] = SDLK_COMPOSE;
 	ODD_keymap[XK_dead_voiced_sound&0xFF] = SDLK_COMPOSE;
 	ODD_keymap[XK_dead_semivoiced_sound&0xFF] = SDLK_COMPOSE;
 	ODD_keymap[XK_dead_belowdot&0xFF] = SDLK_COMPOSE;
#ifdef XK_dead_hook
 	ODD_keymap[XK_dead_hook&0xFF] = SDLK_COMPOSE;
#endif
#ifdef XK_dead_horn
 	ODD_keymap[XK_dead_horn&0xFF] = SDLK_COMPOSE;
#endif

#ifdef XK_dead_circumflex
	/* These X keysyms have 0xFE as the high byte */
	ODD_keymap[XK_dead_circumflex&0xFF] = SDLK_CARET;
#endif
#ifdef XK_ISO_Level3_Shift
	ODD_keymap[XK_ISO_Level3_Shift&0xFF] = SDLK_MODE; /* "Alt Gr" key */
#endif

	/* Map the miscellaneous keys */
	for ( i=0; i<SDL_arraysize(MISC_keymap); ++i )
		MISC_keymap[i] = SDLK_UNKNOWN;

	/* These X keysyms have 0xFF as the high byte */
	MISC_keymap[XK_BackSpace&0xFF] = SDLK_BACKSPACE;
	MISC_keymap[XK_Tab&0xFF] = SDLK_TAB;
	MISC_keymap[XK_Clear&0xFF] = SDLK_CLEAR;
	MISC_keymap[XK_Return&0xFF] = SDLK_RETURN;
	MISC_keymap[XK_Pause&0xFF] = SDLK_PAUSE;
	MISC_keymap[XK_Escape&0xFF] = SDLK_ESCAPE;
	MISC_keymap[XK_Delete&0xFF] = SDLK_DELETE;

	MISC_keymap[XK_KP_0&0xFF] = SDLK_KP0;		/* Keypad 0-9 */
	MISC_keymap[XK_KP_1&0xFF] = SDLK_KP1;
	MISC_keymap[XK_KP_2&0xFF] = SDLK_KP2;
	MISC_keymap[XK_KP_3&0xFF] = SDLK_KP3;
	MISC_keymap[XK_KP_4&0xFF] = SDLK_KP4;
	MISC_keymap[XK_KP_5&0xFF] = SDLK_KP5;
	MISC_keymap[XK_KP_6&0xFF] = SDLK_KP6;
	MISC_keymap[XK_KP_7&0xFF] = SDLK_KP7;
	MISC_keymap[XK_KP_8&0xFF] = SDLK_KP8;
	MISC_keymap[XK_KP_9&0xFF] = SDLK_KP9;
	MISC_keymap[XK_KP_Insert&0xFF] = SDLK_KP0;
	MISC_keymap[XK_KP_End&0xFF] = SDLK_KP1;	
	MISC_keymap[XK_KP_Down&0xFF] = SDLK_KP2;
	MISC_keymap[XK_KP_Page_Down&0xFF] = SDLK_KP3;
	MISC_keymap[XK_KP_Left&0xFF] = SDLK_KP4;
	MISC_keymap[XK_KP_Begin&0xFF] = SDLK_KP5;
	MISC_keymap[XK_KP_Right&0xFF] = SDLK_KP6;
	MISC_keymap[XK_KP_Home&0xFF] = SDLK_KP7;
	MISC_keymap[XK_KP_Up&0xFF] = SDLK_KP8;
	MISC_keymap[XK_KP_Page_Up&0xFF] = SDLK_KP9;
	MISC_keymap[XK_KP_Delete&0xFF] = SDLK_KP_PERIOD;
	MISC_keymap[XK_KP_Decimal&0xFF] = SDLK_KP_PERIOD;
	MISC_keymap[XK_KP_Divide&0xFF] = SDLK_KP_DIVIDE;
	MISC_keymap[XK_KP_Multiply&0xFF] = SDLK_KP_MULTIPLY;
	MISC_keymap[XK_KP_Subtract&0xFF] = SDLK_KP_MINUS;
	MISC_keymap[XK_KP_Add&0xFF] = SDLK_KP_PLUS;
	MISC_keymap[XK_KP_Enter&0xFF] = SDLK_KP_ENTER;
	MISC_keymap[XK_KP_Equal&0xFF] = SDLK_KP_EQUALS;

	MISC_keymap[XK_Up&0xFF] = SDLK_UP;
	MISC_keymap[XK_Down&0xFF] = SDLK_DOWN;
	MISC_keymap[XK_Right&0xFF] = SDLK_RIGHT;
	MISC_keymap[XK_Left&0xFF] = SDLK_LEFT;
	MISC_keymap[XK_Insert&0xFF] = SDLK_INSERT;
	MISC_keymap[XK_Home&0xFF] = SDLK_HOME;
	MISC_keymap[XK_End&0xFF] = SDLK_END;
	MISC_keymap[XK_Page_Up&0xFF] = SDLK_PAGEUP;
	MISC_keymap[XK_Page_Down&0xFF] = SDLK_PAGEDOWN;

	MISC_keymap[XK_F1&0xFF] = SDLK_F1;
	MISC_keymap[XK_F2&0xFF] = SDLK_F2;
	MISC_keymap[XK_F3&0xFF] = SDLK_F3;
	MISC_keymap[XK_F4&0xFF] = SDLK_F4;
	MISC_keymap[XK_F5&0xFF] = SDLK_F5;
	MISC_keymap[XK_F6&0xFF] = SDLK_F6;
	MISC_keymap[XK_F7&0xFF] = SDLK_F7;
	MISC_keymap[XK_F8&0xFF] = SDLK_F8;
	MISC_keymap[XK_F9&0xFF] = SDLK_F9;
	MISC_keymap[XK_F10&0xFF] = SDLK_F10;
	MISC_keymap[XK_F11&0xFF] = SDLK_F11;
	MISC_keymap[XK_F12&0xFF] = SDLK_F12;
	MISC_keymap[XK_F13&0xFF] = SDLK_F13;
	MISC_keymap[XK_F14&0xFF] = SDLK_F14;
	MISC_keymap[XK_F15&0xFF] = SDLK_F15;

	MISC_keymap[XK_Num_Lock&0xFF] = SDLK_NUMLOCK;
	MISC_keymap[XK_Caps_Lock&0xFF] = SDLK_CAPSLOCK;
	MISC_keymap[XK_Scroll_Lock&0xFF] = SDLK_SCROLLOCK;
	MISC_keymap[XK_Shift_R&0xFF] = SDLK_RSHIFT;
	MISC_keymap[XK_Shift_L&0xFF] = SDLK_LSHIFT;
	MISC_keymap[XK_Control_R&0xFF] = SDLK_RCTRL;
	MISC_keymap[XK_Control_L&0xFF] = SDLK_LCTRL;
	MISC_keymap[XK_Alt_R&0xFF] = SDLK_RALT;
	MISC_keymap[XK_Alt_L&0xFF] = SDLK_LALT;
	MISC_keymap[XK_Meta_R&0xFF] = SDLK_RMETA;
	MISC_keymap[XK_Meta_L&0xFF] = SDLK_LMETA;
	MISC_keymap[XK_Super_L&0xFF] = SDLK_LSUPER; /* Left "Windows" */
	MISC_keymap[XK_Super_R&0xFF] = SDLK_RSUPER; /* Right "Windows */
	MISC_keymap[XK_Mode_switch&0xFF] = SDLK_MODE; /* "Alt Gr" key */
	MISC_keymap[XK_Multi_key&0xFF] = SDLK_COMPOSE; /* Multi-key compose */

	MISC_keymap[XK_Help&0xFF] = SDLK_HELP;
	MISC_keymap[XK_Print&0xFF] = SDLK_PRINT;
	MISC_keymap[XK_Sys_Req&0xFF] = SDLK_SYSREQ;
	MISC_keymap[XK_Break&0xFF] = SDLK_BREAK;
	MISC_keymap[XK_Menu&0xFF] = SDLK_MENU;
	MISC_keymap[XK_Hyper_R&0xFF] = SDLK_MENU;   /* Windows "Menu" key */
}

/* Get the translated SDL virtual keysym */
SDLKey X11_TranslateKeycode(Display *display, KeyCode kc)
{
	KeySym xsym;
	SDLKey key;

	xsym = XKeycodeToKeysym(display, kc, 0);
#ifdef DEBUG_KEYS
	fprintf(stderr, "Translating key code %d -> 0x%.4x\n", kc, xsym);
#endif
	key = SDLK_UNKNOWN;
	if ( xsym ) {
		switch (xsym>>8) {
		    case 0x1005FF:
#ifdef SunXK_F36
			if ( xsym == SunXK_F36 )
				key = SDLK_F11;
#endif
#ifdef SunXK_F37
			if ( xsym == SunXK_F37 )
				key = SDLK_F12;
#endif
			break;
		    case 0x00:	/* Latin 1 */
			key = (SDLKey)(xsym & 0xFF);
			break;
		    case 0x01:	/* Latin 2 */
		    case 0x02:	/* Latin 3 */
		    case 0x03:	/* Latin 4 */
		    case 0x04:	/* Katakana */
		    case 0x05:	/* Arabic */
		    case 0x06:	/* Cyrillic */
		    case 0x07:	/* Greek */
		    case 0x08:	/* Technical */
		    case 0x0A:	/* Publishing */
		    case 0x0C:	/* Hebrew */
		    case 0x0D:	/* Thai */
			/* These are wrong, but it's better than nothing */
			key = (SDLKey)(xsym & 0xFF);
			break;
		    case 0xFE:
			key = ODD_keymap[xsym&0xFF];
			break;
		    case 0xFF:
			key = MISC_keymap[xsym&0xFF];
			break;
		    default:
			/*
			fprintf(stderr, "X11: Unhandled xsym, sym = 0x%04x\n",
					(unsigned int)xsym);
			*/
			break;
		}
	} else {
		/* X11 doesn't know how to translate the key! */
		switch (kc) {
		    /* Caution:
		       These keycodes are from the Microsoft Keyboard
		     */
		    case 115:
			key = SDLK_LSUPER;
			break;
		    case 116:
			key = SDLK_RSUPER;
			break;
		    case 117:
			key = SDLK_MENU;
			break;
		    default:
			/*
			 * no point in an error message; happens for
			 * several keys when we get a keymap notify
			 */
			break;
		}
	}
	return key;
}

/* X11 modifier masks for various keys */
static unsigned meta_l_mask, meta_r_mask, alt_l_mask, alt_r_mask;
static unsigned num_mask, mode_switch_mask;

static void get_modifier_masks(Display *display)
{
	static unsigned got_masks;
	int i, j;
	XModifierKeymap *xmods;
	unsigned n;

	if(got_masks)
		return;

	xmods = XGetModifierMapping(display);
	n = xmods->max_keypermod;
	for(i = 3; i < 8; i++) {
		for(j = 0; j < n; j++) {
			KeyCode kc = xmods->modifiermap[i * n + j];
			KeySym ks = XKeycodeToKeysym(display, kc, 0);
			unsigned mask = 1 << i;
			switch(ks) {
			case XK_Num_Lock:
				num_mask = mask; break;
			case XK_Alt_L:
				alt_l_mask = mask; break;
			case XK_Alt_R:
				alt_r_mask = mask; break;
			case XK_Meta_L:
				meta_l_mask = mask; break;
			case XK_Meta_R:
				meta_r_mask = mask; break;
			case XK_Mode_switch:
				mode_switch_mask = mask; break;
			}
		}
	}
	XFreeModifiermap(xmods);
	got_masks = 1;
}


/*
 * This function is semi-official; it is not officially exported and should
 * not be considered part of the SDL API, but may be used by client code
 * that *really* needs it (including legacy code).
 * It is slow, though, and should be avoided if possible.
 *
 * Note that it isn't completely accurate either; in particular, multi-key
 * sequences (dead accents, compose key sequences) will not work since the
 * state has been irrevocably lost.
 */
Uint16 X11_KeyToUnicode(SDLKey keysym, SDLMod modifiers)
{
	struct SDL_VideoDevice *this = current_video;
	char keybuf[32];
	int i;
	KeySym xsym = 0;
	XKeyEvent xkey;
	Uint16 unicode;

	if ( !this || !SDL_Display ) {
		return 0;
	}

	SDL_memset(&xkey, 0, sizeof(xkey));
	xkey.display = SDL_Display;

	xsym = keysym;		/* last resort if not found */
	for (i = 0; i < 256; ++i) {
		if ( MISC_keymap[i] == keysym ) {
			xsym = 0xFF00 | i;
			break;
		} else if ( ODD_keymap[i] == keysym ) {
			xsym = 0xFE00 | i;
			break;
		}
	}

	xkey.keycode = XKeysymToKeycode(xkey.display, xsym);

	get_modifier_masks(SDL_Display);
	if(modifiers & KMOD_SHIFT)
		xkey.state |= ShiftMask;
	if(modifiers & KMOD_CAPS)
		xkey.state |= LockMask;
	if(modifiers & KMOD_CTRL)
		xkey.state |= ControlMask;
	if(modifiers & KMOD_MODE)
		xkey.state |= mode_switch_mask;
	if(modifiers & KMOD_LALT)
		xkey.state |= alt_l_mask;
	if(modifiers & KMOD_RALT)
		xkey.state |= alt_r_mask;
	if(modifiers & KMOD_LMETA)
		xkey.state |= meta_l_mask;
	if(modifiers & KMOD_RMETA)
		xkey.state |= meta_r_mask;
	if(modifiers & KMOD_NUM)
		xkey.state |= num_mask;

	unicode = 0;
	if ( XLookupString(&xkey, keybuf, sizeof(keybuf), NULL, NULL) )
		unicode = (unsigned char)keybuf[0];
	return(unicode);
}


/*
 * Called when focus is regained, to read the keyboard state and generate
 * synthetic keypress/release events.
 * key_vec is a bit vector of keycodes (256 bits)
 */
void X11_SetKeyboardState(Display *display, const char *key_vec)
{
	char keys_return[32];
	int i;
	Uint8 *kstate = SDL_GetKeyState(NULL);
	SDLMod modstate;
	Window junk_window;
	int x, y;
	unsigned int mask;

	/* The first time the window is mapped, we initialize key state */
	if ( ! key_vec ) {
		XQueryKeymap(display, keys_return);
		key_vec = keys_return;
	}

	/* Get the keyboard modifier state */
	modstate = 0;
	get_modifier_masks(display);
	if ( XQueryPointer(display, DefaultRootWindow(display),
		&junk_window, &junk_window, &x, &y, &x, &y, &mask) ) {
		if ( mask & LockMask ) {
			modstate |= KMOD_CAPS;
		}
		if ( mask & mode_switch_mask ) {
			modstate |= KMOD_MODE;
		}
		if ( mask & num_mask ) {
			modstate |= KMOD_NUM;
		}
	}

	/* Zero the new keyboard state and generate it */
	SDL_memset(kstate, 0, SDLK_LAST);
	/*
	 * An obvious optimisation is to check entire longwords at a time in
	 * both loops, but we can't be sure the arrays are aligned so it's not
	 * worth the extra complexity
	 */
	for ( i = 0; i < 32; i++ ) {
		int j;
		if ( !key_vec[i] )
			continue;
		for ( j = 0; j < 8; j++ ) {
			if ( key_vec[i] & (1 << j) ) {
				SDLKey key;
				KeyCode kc = (i << 3 | j);
				key = X11_TranslateKeycode(display, kc);
				if ( key == SDLK_UNKNOWN ) {
					continue;
				}
				kstate[key] = SDL_PRESSED;
				switch (key) {
				    case SDLK_LSHIFT:
					modstate |= KMOD_LSHIFT;
					break;
				    case SDLK_RSHIFT:
					modstate |= KMOD_RSHIFT;
					break;
				    case SDLK_LCTRL:
					modstate |= KMOD_LCTRL;
					break;
				    case SDLK_RCTRL:
					modstate |= KMOD_RCTRL;
					break;
				    case SDLK_LALT:
					modstate |= KMOD_LALT;
					break;
				    case SDLK_RALT:
					modstate |= KMOD_RALT;
					break;
				    case SDLK_LMETA:
					modstate |= KMOD_LMETA;
					break;
				    case SDLK_RMETA:
					modstate |= KMOD_RMETA;
					break;
				    default:
					break;
				}
			}
		}
	}

	/* Hack - set toggle key state */
	if ( modstate & KMOD_CAPS ) {
		kstate[SDLK_CAPSLOCK] = SDL_PRESSED;
	} else {
		kstate[SDLK_CAPSLOCK] = SDL_RELEASED;
	}
	if ( modstate & KMOD_NUM ) {
		kstate[SDLK_NUMLOCK] = SDL_PRESSED;
	} else {
		kstate[SDLK_NUMLOCK] = SDL_RELEASED;
	}

	/* Set the final modifier state */
	SDL_SetModState(modstate);
}

void X11_InitOSKeymap(_THIS)
{
	X11_InitKeymap();
}

void X11_SaveScreenSaver(Display *display, int *saved_timeout, BOOL *dpms)
{
	int timeout, interval, prefer_blank, allow_exp;
	XGetScreenSaver(display, &timeout, &interval, &prefer_blank, &allow_exp);
	*saved_timeout = timeout;

#if SDL_VIDEO_DRIVER_X11_DPMS
	if ( SDL_X11_HAVE_DPMS ) {
		int dummy;
	  	if ( DPMSQueryExtension(display, &dummy, &dummy) ) {
			CARD16 state;
			DPMSInfo(display, &state, dpms);
		}
	}
#else
	*dpms = 0;
#endif /* SDL_VIDEO_DRIVER_X11_DPMS */
}

void X11_DisableScreenSaver(_THIS, Display *display)
{
	int timeout, interval, prefer_blank, allow_exp;

	if (this->hidden->allow_screensaver) {
		return;
	}

	XGetScreenSaver(display, &timeout, &interval, &prefer_blank, &allow_exp);
	timeout = 0;
	XSetScreenSaver(display, timeout, interval, prefer_blank, allow_exp);

#if SDL_VIDEO_DRIVER_X11_DPMS
	if ( SDL_X11_HAVE_DPMS ) {
		int dummy;
	  	if ( DPMSQueryExtension(display, &dummy, &dummy) ) {
			DPMSDisable(display);
		}
	}
#endif /* SDL_VIDEO_DRIVER_X11_DPMS */
}

void X11_RestoreScreenSaver(_THIS, Display *display, int saved_timeout, BOOL dpms)
{
	int timeout, interval, prefer_blank, allow_exp;

	if (this->hidden->allow_screensaver) {
		return;
	}

	XGetScreenSaver(display, &timeout, &interval, &prefer_blank, &allow_exp);
	timeout = saved_timeout;
	XSetScreenSaver(display, timeout, interval, prefer_blank, allow_exp);

#if SDL_VIDEO_DRIVER_X11_DPMS
	if ( SDL_X11_HAVE_DPMS ) {
		int dummy;
	  	if ( DPMSQueryExtension(display, &dummy, &dummy) ) {
			if ( dpms ) {
				DPMSEnable(display);
			}
		}
	}
#endif /* SDL_VIDEO_DRIVER_X11_DPMS */
}