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      1 /*
      2     SDL - Simple DirectMedia Layer
      3     Copyright (C) 1997-2012 Sam Lantinga
      4 
      5     This library is free software; you can redistribute it and/or
      6     modify it under the terms of the GNU Lesser General Public
      7     License as published by the Free Software Foundation; either
      8     version 2.1 of the License, or (at your option) any later version.
      9 
     10     This library is distributed in the hope that it will be useful,
     11     but WITHOUT ANY WARRANTY; without even the implied warranty of
     12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13     Lesser General Public License for more details.
     14 
     15     You should have received a copy of the GNU Lesser General Public
     16     License along with this library; if not, write to the Free Software
     17     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
     18 
     19     Sam Lantinga
     20     slouken (at) libsdl.org
     21 */
     22 #include "SDL_config.h"
     23 
     24 /* Handle the event stream, converting DGA events into SDL events */
     25 
     26 #include <stdio.h>
     27 #include <X11/Xlib.h>
     28 #include "../Xext/extensions/xf86dga.h"
     29 
     30 #include "SDL_timer.h"
     31 #include "../SDL_sysvideo.h"
     32 #include "../../events/SDL_events_c.h"
     33 #include "SDL_dgavideo.h"
     34 #include "SDL_dgaevents_c.h"
     35 
     36 /* get function pointers... */
     37 #include "../x11/SDL_x11dyn.h"
     38 
     39 /* Heheh we're using X11 event code */
     40 extern int X11_Pending(Display *display);
     41 extern void X11_InitKeymap(void);
     42 extern SDLKey X11_TranslateKeycode(Display *display, KeyCode kc);
     43 
     44 static int DGA_DispatchEvent(_THIS)
     45 {
     46 	int posted;
     47 	SDL_NAME(XDGAEvent) xevent;
     48 
     49 	XNextEvent(DGA_Display, (XEvent *)&xevent);
     50 
     51 	posted = 0;
     52 	xevent.type -= DGA_event_base;
     53 	switch (xevent.type) {
     54 
     55 	    /* Mouse motion? */
     56 	    case MotionNotify: {
     57 		if ( SDL_VideoSurface ) {
     58 			posted = SDL_PrivateMouseMotion(0, 1,
     59 					xevent.xmotion.dx, xevent.xmotion.dy);
     60 		}
     61 	    }
     62 	    break;
     63 
     64 	    /* Mouse button press? */
     65 	    case ButtonPress: {
     66 		posted = SDL_PrivateMouseButton(SDL_PRESSED,
     67 					xevent.xbutton.button, 0, 0);
     68 	    }
     69 	    break;
     70 
     71 	    /* Mouse button release? */
     72 	    case ButtonRelease: {
     73 		posted = SDL_PrivateMouseButton(SDL_RELEASED,
     74 					xevent.xbutton.button, 0, 0);
     75 	    }
     76 	    break;
     77 
     78 	    /* Key press? */
     79 	    case KeyPress: {
     80 		SDL_keysym keysym;
     81 		KeyCode keycode;
     82 		XKeyEvent xkey;
     83 
     84 		SDL_NAME(XDGAKeyEventToXKeyEvent)(&xevent.xkey, &xkey);
     85 		keycode = xkey.keycode;
     86 #ifdef DEBUG_XEVENTS
     87 printf("KeyPress (X11 keycode = 0x%X)\n", xkey.keycode);
     88 #endif
     89 		/* Get the translated SDL virtual keysym */
     90 		keysym.scancode = keycode;
     91 		keysym.sym = X11_TranslateKeycode(DGA_Display, keycode);
     92 		keysym.mod = KMOD_NONE;
     93 		keysym.unicode = 0;
     94 
     95 		/* Look up the translated value for the key event */
     96 		if ( SDL_TranslateUNICODE ) {
     97 			static XComposeStatus state;
     98 			char keybuf[32];
     99 
    100 			if ( XLookupString(&xkey, keybuf, sizeof(keybuf), NULL, &state) ) {
    101 				/*
    102 				* FIXME: XLookupString() may yield more than one
    103 				* character, so we need a mechanism to allow for
    104 				* this (perhaps null keypress events with a
    105 				* unicode value)
    106 				*/
    107 				keysym.unicode = (Uint8)keybuf[0];
    108 			}
    109 		}
    110 		posted = SDL_PrivateKeyboard(SDL_PRESSED, &keysym);
    111 	    }
    112 	    break;
    113 
    114 	    /* Key release? */
    115 	    case KeyRelease: {
    116 		SDL_keysym keysym;
    117 		KeyCode keycode;
    118 		XKeyEvent xkey;
    119 
    120 		SDL_NAME(XDGAKeyEventToXKeyEvent)(&xevent.xkey, &xkey);
    121 		keycode = xkey.keycode;
    122 #ifdef DEBUG_XEVENTS
    123 printf("KeyRelease (X11 keycode = 0x%X)\n", xkey.keycode);
    124 #endif
    125 		/* Get the translated SDL virtual keysym */
    126 		keysym.scancode = keycode;
    127 		keysym.sym = X11_TranslateKeycode(DGA_Display, keycode);
    128 		keysym.mod = KMOD_NONE;
    129 		keysym.unicode = 0;
    130 		posted = SDL_PrivateKeyboard(SDL_RELEASED, &keysym);
    131 	    }
    132 	    break;
    133 	}
    134 	return(posted);
    135 }
    136 
    137 void DGA_PumpEvents(_THIS)
    138 {
    139 	/* Keep processing pending events */
    140 	LOCK_DISPLAY();
    141 
    142 	/* Update activity every five seconds to prevent screensaver. --ryan. */
    143 	if (!allow_screensaver) {
    144 		static Uint32 screensaverTicks;
    145 		Uint32 nowTicks = SDL_GetTicks();
    146 		if ((nowTicks - screensaverTicks) > 5000) {
    147 			XResetScreenSaver(DGA_Display);
    148 			screensaverTicks = nowTicks;
    149 		}
    150 	}
    151 
    152 	while ( X11_Pending(DGA_Display) ) {
    153 		DGA_DispatchEvent(this);
    154 	}
    155 
    156 	UNLOCK_DISPLAY();
    157 }
    158 
    159 void DGA_InitOSKeymap(_THIS)
    160 {
    161 	X11_InitKeymap();
    162 }
    163 
    164