/*

SDL - Simple DirectMedia Layer

This library is free software; you can redistribute it and/or

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

You should have received a copy of the GNU Lesser General Public

License along with this library; if not, write to the Free Software

Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Sam Lantinga

/* Handle the event stream, converting X11 events into SDL events */

#include <setjmp.h>

#include <X11/Xlib.h>

#include <X11/Xutil.h>

#include <X11/keysym.h>

#ifdef __SVR4

#include <X11/Sunkeysym.h>

#endif

#include "../SDL_sysvideo.h"

#include "../../events/SDL_sysevents.h"

#include "../../events/SDL_events_c.h"

#include "SDL_x11video.h"

#include "SDL_x11dga_c.h"

#include "SDL_x11modes_c.h"

#include "SDL_x11image_c.h"

#include "SDL_x11gamma_c.h"

#include "SDL_x11wm_c.h"

#include "SDL_x11mouse_c.h"

#include "SDL_x11events_c.h"

/* Define this if you want to debug X11 events */

/*#define DEBUG_XEVENTS*/

/* The translation tables from an X11 keysym to a SDL keysym */

static SDLKey ODD_keymap[256];

static SDLKey MISC_keymap[256];

SDLKey X11_TranslateKeycode(Display *display, KeyCode kc);

/*

Pending resize target for ConfigureNotify (so outdated events don't

cause inappropriate resize events)

*/

int X11_PendingConfigureNotifyWidth = -1;

int X11_PendingConfigureNotifyHeight = -1;

#ifdef X_HAVE_UTF8_STRING

Uint32 Utf8ToUcs4(const Uint8 *utf8)

{

Uint32 c;

int i = 1;

int noOctets = 0;

int firstOctetMask = 0;

unsigned char firstOctet = utf8[0];

if (firstOctet < 0x80) {

/*

Characters in the range:

00000000 to 01111111 (ASCII Range)

are stored in one octet:

0xxxxxxx (The same as its ASCII representation)

The least 6 significant bits of the first octet is the most 6 significant nonzero bits

of the UCS4 representation.

*/

noOctets = 1;

firstOctetMask = 0x7F; /* 0(1111111) - The most significant bit is ignored */

} else if ((firstOctet & 0xE0) /* get the most 3 significant bits by AND'ing with 11100000 */

== 0xC0 ) { /* see if those 3 bits are 110. If so, the char is in this range */

/*

Characters in the range:

00000000 10000000 to 00000111 11111111

are stored in two octets:

110xxxxx 10xxxxxx

The least 5 significant bits of the first octet is the most 5 significant nonzero bits

of the UCS4 representation.

*/

noOctets = 2;

firstOctetMask = 0x1F; /* 000(11111) - The most 3 significant bits are ignored */

} else if ((firstOctet & 0xF0) /* get the most 4 significant bits by AND'ing with 11110000 */

== 0xE0) { /* see if those 4 bits are 1110. If so, the char is in this range */

/*

Characters in the range:

00001000 00000000 to 11111111 11111111

are stored in three octets:

1110xxxx 10xxxxxx 10xxxxxx

The least 4 significant bits of the first octet is the most 4 significant nonzero bits

of the UCS4 representation.

*/

noOctets = 3;

firstOctetMask = 0x0F; /* 0000(1111) - The most 4 significant bits are ignored */

} else if ((firstOctet & 0xF8) /* get the most 5 significant bits by AND'ing with 11111000 */

== 0xF0) { /* see if those 5 bits are 11110. If so, the char is in this range */

/*

Characters in the range:

00000001 00000000 00000000 to 00011111 11111111 11111111

are stored in four octets:

11110xxx 10xxxxxx 10xxxxxx 10xxxxxx

The least 3 significant bits of the first octet is the most 3 significant nonzero bits

of the UCS4 representation.

*/

noOctets = 4;

firstOctetMask = 0x07; /* 11110(111) - The most 5 significant bits are ignored */

} else if ((firstOctet & 0xFC) /* get the most 6 significant bits by AND'ing with 11111100 */

== 0xF8) { /* see if those 6 bits are 111110. If so, the char is in this range */

/*

Characters in the range:

00000000 00100000 00000000 00000000 to

00000011 11111111 11111111 11111111

are stored in five octets:

111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx

The least 2 significant bits of the first octet is the most 2 significant nonzero bits

of the UCS4 representation.

*/

noOctets = 5;

firstOctetMask = 0x03; /* 111110(11) - The most 6 significant bits are ignored */

} else if ((firstOctet & 0xFE) /* get the most 7 significant bits by AND'ing with 11111110 */

== 0xFC) { /* see if those 7 bits are 1111110. If so, the char is in this range */

/*

Characters in the range:

00000100 00000000 00000000 00000000 to

01111111 11111111 11111111 11111111

are stored in six octets:

1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx

The least significant bit of the first octet is the most significant nonzero bit

of the UCS4 representation.

*/

noOctets = 6;

firstOctetMask = 0x01; /* 1111110(1) - The most 7 significant bits are ignored */

} else

return 0; /* The given chunk is not a valid UTF-8 encoded Unicode character */

/*

The least noOctets significant bits of the first octet is the most 2 significant nonzero bits

of the UCS4 representation.

The first 6 bits of the UCS4 representation is the least 8-noOctets-1 significant bits of

firstOctet if the character is not ASCII. If so, it's the least 7 significant bits of firstOctet.

This done by AND'ing firstOctet with its mask to trim the bits used for identifying the

number of continuing octets (if any) and leave only the free bits (the x's)

Sample:

1-octet: 0xxxxxxx & 01111111 = 0xxxxxxx

2-octets: 110xxxxx & 00011111 = 000xxxxx

*/

c = firstOctet & firstOctetMask;

/* Now, start filling c.ucs4 with the bits from the continuing octets from utf8. */

for (i = 1; i < noOctets; i++) {

/* A valid continuing octet is of the form 10xxxxxx */

if ((utf8[i] & 0xC0) /* get the most 2 significant bits by AND'ing with 11000000 */

!= 0x80) /* see if those 2 bits are 10. If not, the is a malformed sequence. */

/*The given chunk is a partial sequence at the end of a string that could

begin a valid character */

return 0;

/* Make room for the next 6-bits */

c <<= 6;

/*

Take only the least 6 significance bits of the current octet (utf8[i]) and fill the created room

of c.ucs4 with them.

This done by AND'ing utf8[i] with 00111111 and the OR'ing the result with c.ucs4.

*/

c |= utf8[i] & 0x3F;

}

return c;

}

/* Given a UTF-8 encoded string pointed to by utf8 of length length in

bytes, returns the corresponding UTF-16 encoded string in the

buffer pointed to by utf16. The maximum number of UTF-16 encoding

units (i.e., Unit16s) allowed in the buffer is specified in

utf16_max_length. The return value is the number of UTF-16

encoding units placed in the output buffer pointed to by utf16.

In case of an error, -1 is returned, leaving some unusable partial

results in the output buffer.

The caller must estimate the size of utf16 buffer by itself before

calling this function. Insufficient output buffer is considered as

an error, and once an error occured, this function doesn't give any

clue how large the result will be.

The error cases include following:

- Invalid byte sequences were in the input UTF-8 bytes. The caller

has no way to know what point in the input buffer was the

errornous byte.

- The input contained a character (a valid UTF-8 byte sequence)

whose scalar value exceeded the range that UTF-16 can represent

(i.e., characters whose Unicode scalar value above 0x110000).

- The output buffer has no enough space to hold entire utf16 data.

Please note:

- '\0'-termination is not assumed both on the input UTF-8 string

and on the output UTF-16 string; any legal zero byte in the input

UTF-8 string will be converted to a 16-bit zero in output. As a

side effect, the last UTF-16 encoding unit stored in the output

buffer will have a non-zero value if the input UTF-8 was not

'\0'-terminated.

- UTF-8 aliases are *not* considered as an error. They are

converted to UTF-16. For example, 0xC0 0xA0, 0xE0 0x80 0xA0,

and 0xF0 0x80 0x80 0xA0 are all mapped to a single UTF-16

encoding unit 0x0020.

- Three byte UTF-8 sequences whose value corresponds to a surrogate

code or other reserved scalar value are not considered as an

error either. They may cause an invalid UTF-16 data (e.g., those

containing unpaired surrogates).

*/

static int Utf8ToUtf16(const Uint8 *utf8, const int utf8_length, Uint16 *utf16, const int utf16_max_length) {

/* p moves over the output buffer. max_ptr points to the next to the last slot of the buffer. */

Uint16 *p = utf16;

Uint16 const *const max_ptr = utf16 + utf16_max_length;

/* end_of_input points to the last byte of input as opposed to the next to the last byte. */

Uint8 const *const end_of_input = utf8 + utf8_length - 1;

while (utf8 <= end_of_input) {

if (p >= max_ptr) {

/* No more output space. */

return -1;

}

if (c < 0x80) {

/* One byte ASCII. */

*p++ = c;

utf8 += 1;

} else if (c < 0xC0) {

/* Follower byte without preceeding leader bytes. */

return -1;

} else if (c < 0xE0) {

/* Two byte sequence. We need one follower byte. */

if (end_of_input - utf8 < 1 || (((utf8[1] ^ 0x80)) & 0xC0)) {

return -1;

}

*p++ = (Uint16)(0xCF80 + (c << 6) + utf8[1]);

utf8 += 2;

} else if (c < 0xF0) {

/* Three byte sequence. We need two follower byte. */

if (end_of_input - utf8 < 2 || (((utf8[1] ^ 0x80) | (utf8[2] ^ 0x80)) & 0xC0)) {

return -1;

}

*p++ = (Uint16)(0xDF80 + (c << 12) + (utf8[1] << 6) + utf8[2]);

utf8 += 3;

} else if (c < 0xF8) {

int plane;

/* Four byte sequence. We need three follower bytes. */

if (end_of_input - utf8 < 3 || (((utf8[1] ^ 0x80) | (utf8[2] ^0x80) | (utf8[3] ^ 0x80)) & 0xC0)) {

return -1;

}

plane = (-0xC8 + (c << 2) + (utf8[1] >> 4));

if (plane == 0) {

/* This four byte sequence is an alias that

corresponds to a Unicode scalar value in BMP.

It fits in an UTF-16 encoding unit. */

*p++ = (Uint16)(0xDF80 + (utf8[1] << 12) + (utf8[2] << 6) + utf8[3]);

} else if (plane <= 16) {

/* This is a legal four byte sequence that corresponds to a surrogate pair. */

if (p + 1 >= max_ptr) {

/* No enough space on the output buffer for the pair. */

return -1;

}

*p++ = (Uint16)(0xE5B8 + (c << 8) + (utf8[1] << 2) + (utf8[2] >> 4));

*p++ = (Uint16)(0xDB80 + ((utf8[2] & 0x0F) << 6) + utf8[3]);

} else {

/* This four byte sequence is out of UTF-16 code space. */

return -1;

}

utf8 += 4;

} else {

/* Longer sequence or unused byte. */

return -1;

}

}

return p - utf16;

}

/* Check to see if this is a repeated key.

(idea shamelessly lifted from GII -- thanks guys! :)

*/

static int X11_KeyRepeat(Display *display, XEvent *event)

{

XEvent peekevent;

int repeated;

repeated = 0;

if ( XPending(display) ) {

XPeekEvent(display, &peekevent);

if ( (peekevent.type == KeyPress) &&

(peekevent.xkey.keycode == event->xkey.keycode) &&

}

}

return(repeated);

}

/* Note: The X server buffers and accumulates mouse motion events, so

the motion event generated by the warp may not appear exactly as we

expect it to. We work around this (and improve performance) by only

warping the pointer when it reaches the edge, and then wait for it.

*/

#define MOUSE_FUDGE_FACTOR 8

static __inline__ int X11_WarpedMotion(_THIS, XEvent *xevent)

{

int w, h, i;

int deltax, deltay;

int posted;

w = SDL_VideoSurface->w;

h = SDL_VideoSurface->h;

deltax = xevent->xmotion.x - mouse_last.x;

deltay = xevent->xmotion.y - mouse_last.y;

#ifdef DEBUG_MOTION

printf("Warped mouse motion: %d,%d\n", deltax, deltay);

#endif

mouse_last.x = xevent->xmotion.x;

mouse_last.y = xevent->xmotion.y;

posted = SDL_PrivateMouseMotion(0, 1, deltax, deltay);

if ( (xevent->xmotion.x < MOUSE_FUDGE_FACTOR) ||

(xevent->xmotion.x > (w-MOUSE_FUDGE_FACTOR)) ||

(xevent->xmotion.y < MOUSE_FUDGE_FACTOR) ||

(xevent->xmotion.y > (h-MOUSE_FUDGE_FACTOR)) ) {

/* Get the events that have accumulated */

deltax = xevent->xmotion.x - mouse_last.x;

deltay = xevent->xmotion.y - mouse_last.y;

#ifdef DEBUG_MOTION

printf("Extra mouse motion: %d,%d\n", deltax, deltay);

#endif

mouse_last.x = xevent->xmotion.x;

mouse_last.y = xevent->xmotion.y;

posted += SDL_PrivateMouseMotion(0, 1, deltax, deltay);

}

mouse_last.x = w/2;

mouse_last.y = h/2;

mouse_last.x, mouse_last.y);

for ( i=0; i<10; ++i ) {

if ( (xevent->xmotion.x >

(mouse_last.x-MOUSE_FUDGE_FACTOR)) &&

(xevent->xmotion.x <

(mouse_last.x+MOUSE_FUDGE_FACTOR)) &&

(xevent->xmotion.y >

(mouse_last.y-MOUSE_FUDGE_FACTOR)) &&

(xevent->xmotion.y <

(mouse_last.y+MOUSE_FUDGE_FACTOR)) ) {

break;

}

#ifdef DEBUG_XEVENTS

printf("Lost mouse motion: %d,%d\n", xevent->xmotion.x, xevent->xmotion.y);

#endif

}

#ifdef DEBUG_XEVENTS

if ( i == 10 ) {

printf("Warning: didn't detect mouse warp motion\n");

}

#endif

}

return(posted);

}

static int X11_DispatchEvent(_THIS)

{

int posted;

XEvent xevent;

/* Discard KeyRelease and KeyPress events generated by auto-repeat.

We need to do it before passing event to XFilterEvent. Otherwise,

KeyRelease aware IMs are confused... */

if ( xevent.type == KeyRelease

&& X11_KeyRepeat(SDL_Display, &xevent) ) {

return 0;

}

#ifdef X_HAVE_UTF8_STRING

/* If we are translating with IM, we need to pass all events

to XFilterEvent, and discard those filtered events immediately. */

if ( SDL_TranslateUNICODE

&& SDL_IM != NULL

&& XFilterEvent(&xevent, None) ) {

return 0;

}

#endif

posted = 0;

switch (xevent.type) {

/* Gaining mouse coverage? */

case EnterNotify: {

#ifdef DEBUG_XEVENTS

if ( xevent.xcrossing.mode == NotifyGrab )

printf("Mode: NotifyGrab\n");

if ( xevent.xcrossing.mode == NotifyUngrab )

printf("Mode: NotifyUngrab\n");

#endif

if ( this->input_grab == SDL_GRAB_OFF ) {

posted = SDL_PrivateAppActive(1, SDL_APPMOUSEFOCUS);

posted = SDL_PrivateMouseMotion(0, 0,

xevent.xcrossing.x,

xevent.xcrossing.y);

}

break;

/* Losing mouse coverage? */

case LeaveNotify: {

#ifdef DEBUG_XEVENTS

if ( xevent.xcrossing.mode == NotifyGrab )

printf("Mode: NotifyGrab\n");

if ( xevent.xcrossing.mode == NotifyUngrab )

printf("Mode: NotifyUngrab\n");

#endif

if ( (xevent.xcrossing.mode != NotifyGrab) &&

(xevent.xcrossing.mode != NotifyUngrab) &&

(xevent.xcrossing.detail != NotifyInferior) ) {

if ( this->input_grab == SDL_GRAB_OFF ) {

posted = SDL_PrivateAppActive(0, SDL_APPMOUSEFOCUS);

} else {

posted = SDL_PrivateMouseMotion(0, 0,

xevent.xcrossing.x,

xevent.xcrossing.y);

}

}

}

break;

/* Gaining input focus? */

case FocusIn: {

#ifdef DEBUG_XEVENTS

printf("FocusIn!\n");

#endif

posted = SDL_PrivateAppActive(1, SDL_APPINPUTFOCUS);

/* Queue entry into fullscreen mode */

switch_waiting = 0x01 | SDL_FULLSCREEN;

switch_time = SDL_GetTicks() + 1500;

}

break;

/* Losing input focus? */

case FocusOut: {

#ifdef DEBUG_XEVENTS

printf("FocusOut!\n");

#endif

posted = SDL_PrivateAppActive(0, SDL_APPINPUTFOCUS);

/* Queue leaving fullscreen mode */

switch_waiting = 0x01;

switch_time = SDL_GetTicks() + 200;

}

break;

/* Some IM requires MappingNotify to be passed to

XRefreshKeyboardMapping by the app. */

case MappingNotify: {

XRefreshKeyboardMapping(&xevent.xmapping);

}

break;

/* Generated upon EnterWindow and FocusIn */

case KeymapNotify: {

#ifdef DEBUG_XEVENTS

printf("KeymapNotify!\n");

#endif

}

break;

/* Mouse motion? */

case MotionNotify: {

if ( SDL_VideoSurface ) {

if ( mouse_relative ) {

if ( using_dga & DGA_MOUSE ) {

#ifdef DEBUG_MOTION

printf("DGA motion: %d,%d\n", xevent.xmotion.x_root, xevent.xmotion.y_root);

#endif

posted = SDL_PrivateMouseMotion(0, 1,

xevent.xmotion.x_root,

xevent.xmotion.y_root);

} else {

posted = X11_WarpedMotion(this,&xevent);

}

} else {

#ifdef DEBUG_MOTION

printf("X11 motion: %d,%d\n", xevent.xmotion.x, xevent.xmotion.y);

#endif

posted = SDL_PrivateMouseMotion(0, 0,

xevent.xmotion.x,

xevent.xmotion.y);

}

}

}

break;

/* Mouse button press? */

case ButtonPress: {

posted = SDL_PrivateMouseButton(SDL_PRESSED,

xevent.xbutton.button, 0, 0);

}

break;

/* Mouse button release? */

case ButtonRelease: {

posted = SDL_PrivateMouseButton(SDL_RELEASED,

xevent.xbutton.button, 0, 0);

}

break;

/* Key press? */

case KeyPress: {

SDL_keysym keysym;

#ifdef DEBUG_XEVENTS

printf("KeyPress (X11 keycode = 0x%X)\n", xevent.xkey.keycode);

#endif

/* If we're not doing translation, we're done! */

if ( !SDL_TranslateUNICODE ) {

/* Get the translated SDL virtual keysym and put it on the queue.*/

keysym.scancode = keycode;

keysym.sym = X11_TranslateKeycode(SDL_Display, keycode);

keysym.mod = KMOD_NONE;

keysym.unicode = 0;

posted = SDL_PrivateKeyboard(SDL_PRESSED, &keysym);

break;

}

/* Look up the translated value for the key event */

#ifdef X_HAVE_UTF8_STRING

if ( SDL_IC != NULL ) {

Status status;

KeySym xkeysym;

int i;

/* ... It's true, but Xutf8LookupString can

return more than one characters. Moreover,

the spec. put no upper bound, so we should

be ready for longer strings. */

char keybuf[32];

char *keydata = keybuf;

int count;

Uint16 utf16buf[32];

Uint16 *utf16data = utf16buf;

int utf16size;

int utf16length;

count = Xutf8LookupString(SDL_IC, &xevent.xkey, keydata, sizeof(keybuf), &xkeysym, &status);

if (XBufferOverflow == status) {

/* The IM has just generated somewhat long

string. We need a longer buffer in this

case. */

keydata = SDL_malloc(count);

if ( keydata == NULL ) {

SDL_OutOfMemory();

break;

}

count = Xutf8LookupString(SDL_IC, &xevent.xkey, keydata, count, &xkeysym, &status);

}

switch (status) {

case XBufferOverflow: {

/* Oops! We have allocated the bytes as

requested by Xutf8LookupString, so the

length of the buffer must be

sufficient. This case should never

happen! */

SDL_SetError("Xutf8LookupString indicated a double buffer overflow!");

break;

}

case XLookupChars:

case XLookupBoth: {

if (0 == count) {

break;

}

/* We got a converted string from IM. Make

sure to deliver all characters to the

application as SDL events. Note that

an SDL event can only carry one UTF-16

encoding unit, and a surrogate pair is

delivered as two SDL events. I guess

this behaviour is probably _imported_

from Windows or MacOS. To do so, we need

to convert the UTF-8 data into UTF-16

data (not UCS4/UTF-32!). We need an

estimate of the number of UTF-16 encoding

units here. The worst case is pure ASCII

string. Assume so. */

/* In 1.3 SDL may have a text event instead, that

carries the whole UTF-8 string with it. */

utf16size = count * sizeof(Uint16);

if (utf16size > sizeof(utf16buf)) {

utf16data = (Uint16 *) SDL_malloc(utf16size);

if (utf16data == NULL) {

SDL_OutOfMemory();

break;

}

}

utf16length = Utf8ToUtf16((Uint8 *)keydata, count, utf16data, utf16size);

if (utf16length < 0) {

/* The keydata contained an invalid byte

sequence. It should be a bug of the IM

or Xlib... */

SDL_SetError("Oops! Xutf8LookupString returned an invalid UTF-8 sequence!");

break;

}

/* Deliver all UTF-16 encoding units. At

this moment, SDL event queue has a

fixed size (128 events), and an SDL

event can hold just one UTF-16 encoding

unit. So, if we receive more than 128

UTF-16 encoding units from a commit,

exceeded characters will be lost. */

for (i = 0; i < utf16length - 1; i++) {

keysym.scancode = 0;

keysym.sym = SDLK_UNKNOWN;

keysym.mod = KMOD_NONE;

keysym.unicode = utf16data[i];

posted = SDL_PrivateKeyboard(SDL_PRESSED, &keysym);

}

/* The keysym for the last character carries the

scancode and symbol that corresponds to the X11

keycode. */

if (utf16length > 0) {

keysym.scancode = keycode;

keysym.sym = (keycode ? X11_TranslateKeycode(SDL_Display, keycode) : 0);

keysym.mod = KMOD_NONE;

keysym.unicode = utf16data[utf16length - 1];

posted = SDL_PrivateKeyboard(SDL_PRESSED, &keysym);

}

break;

}

case XLookupKeySym: {

/* I'm not sure whether it is possible that

a zero keycode makes XLookupKeySym

status. What I'm sure is that a

combination of a zero scan code and a non

zero sym makes SDL_PrivateKeyboard

strange state... So, just discard it.

If this doesn't work, I'm receiving bug

reports, and I can know under what

condition this case happens. */

if (keycode) {

keysym.scancode = keycode;

keysym.sym = X11_TranslateKeycode(SDL_Display, keycode);

keysym.mod = KMOD_NONE;

keysym.unicode = 0;

posted = SDL_PrivateKeyboard(SDL_PRESSED, &keysym);

}

break;

}

case XLookupNone: {

/* IM has eaten the event. */

break;

}

default:

/* An unknown status from Xutf8LookupString. */

SDL_SetError("Oops! Xutf8LookupStringreturned an unknown status");

}

/* Release dynamic buffers if allocated. */

if (keydata != NULL && keybuf != keydata) {

SDL_free(keydata);

}

if (utf16data != NULL && utf16buf != utf16data) {

SDL_free(utf16data);

}

}

else

#endif

{

static XComposeStatus state;

char keybuf[32];

keysym.scancode = keycode;

keysym.sym = X11_TranslateKeycode(SDL_Display, keycode);

keysym.mod = KMOD_NONE;

keysym.unicode = 0;

keybuf, sizeof(keybuf),

NULL, &state) ) {

/*

* FIXME: XLookupString() may yield more than one

* character, so we need a mechanism to allow for

* this (perhaps null keypress events with a

* unicode value)

*/

keysym.unicode = (Uint8)keybuf[0];

}

posted = SDL_PrivateKeyboard(SDL_PRESSED, &keysym);

}

break;

/* Key release? */

case KeyRelease: {

SDL_keysym keysym;

if (keycode == 0) {

/* There should be no KeyRelease for keycode == 0,

since it is a notification from IM but a real

keystroke. */

/* We need to emit some diagnostic message here. */

break;

}

#ifdef DEBUG_XEVENTS

printf("KeyRelease (X11 keycode = 0x%X)\n", xevent.xkey.keycode);

#endif

/* Get the translated SDL virtual keysym */

keysym.scancode = keycode;

keysym.sym = X11_TranslateKeycode(SDL_Display, keycode);

keysym.mod = KMOD_NONE;

keysym.unicode = 0;

posted = SDL_PrivateKeyboard(SDL_RELEASED, &keysym);

}

break;

/* Have we been iconified? */

case UnmapNotify: {

#ifdef DEBUG_XEVENTS

printf("UnmapNotify!\n");

#endif

/* If we're active, make ourselves inactive */

if ( SDL_GetAppState() & SDL_APPACTIVE ) {

/* Swap out the gamma before we go inactive */

X11_SwapVidModeGamma(this);

/* Send an internal deactivate event */

posted = SDL_PrivateAppActive(0,

SDL_APPACTIVE|SDL_APPINPUTFOCUS);

}

}

break;

/* Have we been restored? */

case MapNotify: {

#ifdef DEBUG_XEVENTS

printf("MapNotify!\n");

#endif

/* If we're not active, make ourselves active */

if ( !(SDL_GetAppState() & SDL_APPACTIVE) ) {

/* Send an internal activate event */

posted = SDL_PrivateAppActive(1, SDL_APPACTIVE);

/* Now that we're active, swap the gamma back */

X11_SwapVidModeGamma(this);

}

if ( SDL_VideoSurface &&

(SDL_VideoSurface->flags & SDL_FULLSCREEN) ) {

X11_EnterFullScreen(this);

} else {

X11_GrabInputNoLock(this, this->input_grab);

}

X11_CheckMouseModeNoLock(this);

if ( SDL_VideoSurface ) {

X11_RefreshDisplay(this);

}

}

break;

/* Have we been resized or moved? */

case ConfigureNotify: {

#ifdef DEBUG_XEVENTS

printf("ConfigureNotify! (resize: %dx%d)\n", xevent.xconfigure.width, xevent.xconfigure.height);

#endif

if ((X11_PendingConfigureNotifyWidth != -1) &&

(X11_PendingConfigureNotifyHeight != -1)) {

if ((xevent.xconfigure.width != X11_PendingConfigureNotifyWidth) &&

(xevent.xconfigure.height != X11_PendingConfigureNotifyHeight)) {

/* Event is from before the resize, so ignore. */

break;

}

X11_PendingConfigureNotifyWidth = -1;

X11_PendingConfigureNotifyHeight = -1;

}

if ( SDL_VideoSurface ) {

if ((xevent.xconfigure.width != SDL_VideoSurface->w) ||

(xevent.xconfigure.height != SDL_VideoSurface->h)) {

/* FIXME: Find a better fix for the bug with KDE 1.2 */

if ( ! ((xevent.xconfigure.width == 32) &&

(xevent.xconfigure.height == 32)) ) {

SDL_PrivateResize(xevent.xconfigure.width,

xevent.xconfigure.height);

}

} else {

/* OpenGL windows need to know about the change */

if ( SDL_VideoSurface->flags & SDL_OPENGL ) {

SDL_PrivateExpose();

}

}

}

}

break;

/* Have we been requested to quit (or another client message?) */

case ClientMessage: {

if ( (xevent.xclient.format == 32) &&

(xevent.xclient.data.l[0] == WM_DELETE_WINDOW) )

{

posted = SDL_PrivateQuit();

} else

if ( SDL_ProcessEvents[SDL_SYSWMEVENT] == SDL_ENABLE ) {

SDL_SysWMmsg wmmsg;

SDL_VERSION(&wmmsg.version);

wmmsg.subsystem = SDL_SYSWM_X11;

wmmsg.event.xevent = xevent;

posted = SDL_PrivateSysWMEvent(&wmmsg);

}

}

break;

/* Do we need to refresh ourselves? */

case Expose: {

#ifdef DEBUG_XEVENTS

printf("Expose (count = %d)\n", xevent.xexpose.count);

#endif

if ( SDL_VideoSurface && (xevent.xexpose.count == 0) ) {

}

}

break;

default: {

#ifdef DEBUG_XEVENTS

printf("Unhandled event %d\n", xevent.type);

#endif

/* Only post the event if we're watching for it */

if ( SDL_ProcessEvents[SDL_SYSWMEVENT] == SDL_ENABLE ) {

SDL_SysWMmsg wmmsg;

SDL_VERSION(&wmmsg.version);

wmmsg.subsystem = SDL_SYSWM_X11;

wmmsg.event.xevent = xevent;

posted = SDL_PrivateSysWMEvent(&wmmsg);

}

}

break;

}

return(posted);

}

/* Ack! XPending() actually performs a blocking read if no events available */

int X11_Pending(Display *display)

{

/* Flush the display connection and look to see if events are queued */

XFlush(display);

if ( XEventsQueued(display, QueuedAlready) ) {

return(1);

}

/* More drastic measures are required -- see if X is ready to talk */

{

static struct timeval zero_time; /* static == 0 */

int x11_fd;

fd_set fdset;

x11_fd = ConnectionNumber(display);

FD_ZERO(&fdset);

FD_SET(x11_fd, &fdset);

if ( select(x11_fd+1, &fdset, NULL, NULL, &zero_time) == 1 ) {

}

}

/* Oh well, nothing is ready .. */

return(0);

}

void X11_PumpEvents(_THIS)

{

int pending;

/* Update activity every five seconds to prevent screensaver. --ryan. */

if (!allow_screensaver) {

static Uint32 screensaverTicks;

Uint32 nowTicks = SDL_GetTicks();

if ((nowTicks - screensaverTicks) > 5000) {

XResetScreenSaver(SDL_Display);

screensaverTicks = nowTicks;

}

}

/* Keep processing pending events */

pending = 0;

while ( X11_Pending(SDL_Display) ) {

X11_DispatchEvent(this);

++pending;

}

if ( switch_waiting ) {

Uint32 now;

now = SDL_GetTicks();

if ( pending || !SDL_VideoSurface ) {

/* Try again later... */

if ( switch_waiting & SDL_FULLSCREEN ) {

switch_time = now + 1500;

} else {

switch_time = now + 200;

}

Uint32 go_fullscreen;

go_fullscreen = switch_waiting & SDL_FULLSCREEN;

switch_waiting = 0;

if ( SDL_VideoSurface->flags & SDL_FULLSCREEN ) {

if ( go_fullscreen ) {

X11_EnterFullScreen(this);

} else {

X11_LeaveFullScreen(this);

}

}

/* Handle focus in/out when grabbed */

if ( go_fullscreen ) {

X11_GrabInputNoLock(this, this->input_grab);

} else {

X11_GrabInputNoLock(this, SDL_GRAB_OFF);

}

X11_CheckMouseModeNoLock(this);

}

}

}

void X11_InitKeymap(void)

{

int i;

/* Odd keys used in international keyboards */

ODD_keymap[i] = SDLK_UNKNOWN;

/* Some of these might be mappable to an existing SDLK_ code */

ODD_keymap[XK_dead_grave&0xFF] = SDLK_COMPOSE;

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;