[libpicofe.git] / linux / xenv.c

/*
 * (C) Gražvydas "notaz" Ignotas, 2009-2012
 *
 * This work is licensed under the terms of any of these licenses
 * (at your option):
 *  - GNU GPL, version 2 or later.
 *  - GNU LGPL, version 2.1 or later.
 * See the COPYING file in the top-level directory.
 */

#include <stdio.h>
#include <string.h>
#include <pthread.h>

#include <dlfcn.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/XKBlib.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <termios.h>
#include <linux/kd.h>

#define PFX "xenv: "

#define FPTR(f) typeof(f) * p##f
#define FPTR_LINK(xf, dl, f) { \
	xf.p##f = dlsym(dl, #f); \
	if (xf.p##f == NULL) { \
		fprintf(stderr, "missing symbol: %s\n", #f); \
		goto fail; \
	} \
}

struct xstuff {
	Display *display;
	Window window;
	FPTR(XCreateBitmapFromData);
	FPTR(XCreatePixmapCursor);
	FPTR(XFreePixmap);
	FPTR(XOpenDisplay);
	FPTR(XDisplayName);
	FPTR(XCloseDisplay);
	FPTR(XCreateSimpleWindow);
	FPTR(XChangeWindowAttributes);
	FPTR(XSelectInput);
	FPTR(XMapWindow);
	FPTR(XNextEvent);
	FPTR(XCheckTypedEvent);
	FPTR(XWithdrawWindow);
	FPTR(XGrabKeyboard);
	FPTR(XPending);
	FPTR(XLookupKeysym);
	FPTR(XkbSetDetectableAutoRepeat);
	FPTR(XStoreName);
	FPTR(XIconifyWindow);
	FPTR(XMoveResizeWindow);
	FPTR(XInternAtom);
	FPTR(XSetWMHints);
	FPTR(XSync);
};

static struct xstuff g_xstuff;

static Cursor transparent_cursor(struct xstuff *xf, Display *display, Window win)
{
	Cursor cursor;
	Pixmap pix;
	XColor dummy;
	char d = 0;

	memset(&dummy, 0, sizeof(dummy));
	pix = xf->pXCreateBitmapFromData(display, win, &d, 1, 1);
	cursor = xf->pXCreatePixmapCursor(display, pix, pix,
			&dummy, &dummy, 0, 0);
	xf->pXFreePixmap(display, pix);
	return cursor;
}

static int x11h_init(const char *window_title)
{
	unsigned int display_width, display_height;
	Display *display;
	XSetWindowAttributes attributes;
	Window win;
	Visual *visual;
	void *x11lib;
	int screen;

	memset(&g_xstuff, 0, sizeof(g_xstuff));
	x11lib = dlopen("libX11.so.6", RTLD_LAZY);
	if (x11lib == NULL) {
		fprintf(stderr, "libX11.so load failed:\n%s\n", dlerror());
		goto fail;
	}
	FPTR_LINK(g_xstuff, x11lib, XCreateBitmapFromData);
	FPTR_LINK(g_xstuff, x11lib, XCreatePixmapCursor);
	FPTR_LINK(g_xstuff, x11lib, XFreePixmap);
	FPTR_LINK(g_xstuff, x11lib, XOpenDisplay);
	FPTR_LINK(g_xstuff, x11lib, XDisplayName);
	FPTR_LINK(g_xstuff, x11lib, XCloseDisplay);
	FPTR_LINK(g_xstuff, x11lib, XCreateSimpleWindow);
	FPTR_LINK(g_xstuff, x11lib, XChangeWindowAttributes);
	FPTR_LINK(g_xstuff, x11lib, XSelectInput);
	FPTR_LINK(g_xstuff, x11lib, XMapWindow);
	FPTR_LINK(g_xstuff, x11lib, XNextEvent);
	FPTR_LINK(g_xstuff, x11lib, XCheckTypedEvent);
	FPTR_LINK(g_xstuff, x11lib, XWithdrawWindow);
	FPTR_LINK(g_xstuff, x11lib, XGrabKeyboard);
	FPTR_LINK(g_xstuff, x11lib, XPending);
	FPTR_LINK(g_xstuff, x11lib, XLookupKeysym);
	FPTR_LINK(g_xstuff, x11lib, XkbSetDetectableAutoRepeat);
	FPTR_LINK(g_xstuff, x11lib, XStoreName);
	FPTR_LINK(g_xstuff, x11lib, XIconifyWindow);
	FPTR_LINK(g_xstuff, x11lib, XMoveResizeWindow);
	FPTR_LINK(g_xstuff, x11lib, XInternAtom);
	FPTR_LINK(g_xstuff, x11lib, XSetWMHints);
	FPTR_LINK(g_xstuff, x11lib, XSync);

	//XInitThreads();

	g_xstuff.display = display = g_xstuff.pXOpenDisplay(NULL);
	if (display == NULL)
	{
		fprintf(stderr, "cannot connect to X server %s, X handling disabled.\n",
				g_xstuff.pXDisplayName(NULL));
		goto fail2;
	}

	visual = DefaultVisual(display, 0);
	if (visual->class != TrueColor)
		fprintf(stderr, PFX "warning: non true color visual\n");

	printf(PFX "X vendor: %s, rel: %d, display: %s, protocol ver: %d.%d\n", ServerVendor(display),
		VendorRelease(display), DisplayString(display), ProtocolVersion(display),
		ProtocolRevision(display));

	screen = DefaultScreen(display);

	display_width = DisplayWidth(display, screen);
	display_height = DisplayHeight(display, screen);
	printf(PFX "display is %dx%d\n", display_width, display_height);

	g_xstuff.window = win = g_xstuff.pXCreateSimpleWindow(display,
		RootWindow(display, screen), 0, 0, display_width, display_height,
		0, BlackPixel(display, screen), BlackPixel(display, screen));

	attributes.override_redirect = True;
	attributes.cursor = transparent_cursor(&g_xstuff, display, win);
	g_xstuff.pXChangeWindowAttributes(display, win, CWOverrideRedirect | CWCursor, &attributes);

	g_xstuff.pXStoreName(display, win, window_title);
	g_xstuff.pXSelectInput(display, win, ExposureMask | FocusChangeMask
		| KeyPressMask | KeyReleaseMask | ButtonPressMask
		| ButtonReleaseMask | PointerMotionMask | PropertyChangeMask);
	g_xstuff.pXMapWindow(display, win);
	g_xstuff.pXGrabKeyboard(display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
	g_xstuff.pXkbSetDetectableAutoRepeat(display, 1, NULL);
	// XSetIOErrorHandler

	// we don't know when event dispatch will be called, so sync now
	g_xstuff.pXSync(display, False);

	return 0;
fail2:
	dlclose(x11lib);
fail:
	g_xstuff.display = NULL;
	fprintf(stderr, "x11 handling disabled.\n");
	return -1;
}

static void x11h_update(int (*key_cb)(void *cb_arg, int kc, int is_pressed),
			int (*mouseb_cb)(void *cb_arg, int x, int y, int button, int is_pressed),
			int (*mousem_cb)(void *cb_arg, int x, int y),
			void *cb_arg)
{
	XEvent evt;
	int keysym;

	while (g_xstuff.pXPending(g_xstuff.display))
	{
		g_xstuff.pXNextEvent(g_xstuff.display, &evt);
		switch (evt.type)
		{
		case Expose:
			while (g_xstuff.pXCheckTypedEvent(g_xstuff.display, Expose, &evt))
				;
			break;

		case KeyPress:
			keysym = g_xstuff.pXLookupKeysym(&evt.xkey, 0);
			if (key_cb != NULL)
				key_cb(cb_arg, keysym, 1);
			break;

		case KeyRelease:
			keysym = g_xstuff.pXLookupKeysym(&evt.xkey, 0);
			if (key_cb != NULL)
				key_cb(cb_arg, keysym, 0);
			break;

		case ButtonPress:
			if (mouseb_cb != NULL)
				mouseb_cb(cb_arg, evt.xbutton.x, evt.xbutton.y,
					  evt.xbutton.button, 1);
			break;

		case ButtonRelease:
			if (mouseb_cb != NULL)
				mouseb_cb(cb_arg, evt.xbutton.x, evt.xbutton.y,
					  evt.xbutton.button, 0);
			break;

		case MotionNotify:
			if (mousem_cb != NULL)
				mousem_cb(cb_arg, evt.xmotion.x, evt.xmotion.y);
			break;
		}
	}
}

static void x11h_wait_vmstate(void)
{
	Atom wm_state = g_xstuff.pXInternAtom(g_xstuff.display, "WM_STATE", False);
	XEvent evt;
	int i;

	usleep(20000);

	for (i = 0; i < 20; i++) {
		while (g_xstuff.pXPending(g_xstuff.display)) {
			g_xstuff.pXNextEvent(g_xstuff.display, &evt);
			// printf("w event %d\n", evt.type);
			if (evt.type == PropertyNotify && evt.xproperty.atom == wm_state)
				return;
		}
		usleep(200000);
	}

	fprintf(stderr, PFX "timeout waiting for wm_state change\n");
}

static int x11h_minimize(void)
{
	XSetWindowAttributes attributes;
	Display *display = g_xstuff.display;
	Window window = g_xstuff.window;
	int screen = DefaultScreen(g_xstuff.display);
	int display_width, display_height;
	XWMHints wm_hints;
	XEvent evt;

	g_xstuff.pXWithdrawWindow(display, window, screen);

	attributes.override_redirect = False;
	g_xstuff.pXChangeWindowAttributes(display, window,
		CWOverrideRedirect, &attributes);

	wm_hints.flags = StateHint;
	wm_hints.initial_state = IconicState;
	g_xstuff.pXSetWMHints(display, window, &wm_hints);

	g_xstuff.pXMapWindow(display, window);

	while (g_xstuff.pXNextEvent(display, &evt) == 0)
	{
		// printf("m event %d\n", evt.type);
		switch (evt.type)
		{
			case FocusIn:
				goto out;
			default:
				break;
		}
	}

out:
	g_xstuff.pXWithdrawWindow(display, window, screen);

	// must wait for some magic vmstate property change before setting override_redirect
	x11h_wait_vmstate();

	attributes.override_redirect = True;
	g_xstuff.pXChangeWindowAttributes(display, window,
		CWOverrideRedirect, &attributes);

	// fixup window after resize on override_redirect loss
	display_width = DisplayWidth(display, screen);
	display_height = DisplayHeight(display, screen);
	g_xstuff.pXMoveResizeWindow(display, window, 0, 0, display_width, display_height);

	g_xstuff.pXMapWindow(display, window);
	g_xstuff.pXGrabKeyboard(display, window, False, GrabModeAsync, GrabModeAsync, CurrentTime);
	g_xstuff.pXkbSetDetectableAutoRepeat(display, 1, NULL);

	// we don't know when event dispatch will be called, so sync now
	g_xstuff.pXSync(display, False);

	return 0;
}

static struct termios g_kbd_termios_saved;
static int g_kbdfd = -1;

static int tty_init(void)
{
	struct termios kbd_termios;
	int mode;

	g_kbdfd = open("/dev/tty", O_RDWR);
	if (g_kbdfd == -1) {
		perror(PFX "open /dev/tty");
		return -1;
	}

	if (ioctl(g_kbdfd, KDGETMODE, &mode) == -1) {
		perror(PFX "(not hiding FB): KDGETMODE");
		goto fail;
	}

	if (tcgetattr(g_kbdfd, &kbd_termios) == -1) {
		perror(PFX "tcgetattr");
		goto fail;
	}

	g_kbd_termios_saved = kbd_termios;
	kbd_termios.c_lflag &= ~(ICANON | ECHO); // | ISIG);
	kbd_termios.c_iflag &= ~(ISTRIP | IGNCR | ICRNL | INLCR | IXOFF | IXON);
	kbd_termios.c_cc[VMIN] = 0;
	kbd_termios.c_cc[VTIME] = 0;

	if (tcsetattr(g_kbdfd, TCSAFLUSH, &kbd_termios) == -1) {
		perror(PFX "tcsetattr");
		goto fail;
	}

	if (ioctl(g_kbdfd, KDSETMODE, KD_GRAPHICS) == -1) {
		perror(PFX "KDSETMODE KD_GRAPHICS");
		tcsetattr(g_kbdfd, TCSAFLUSH, &g_kbd_termios_saved);
		goto fail;
	}

	return 0;

fail:
	close(g_kbdfd);
	g_kbdfd = -1;
	return -1;
}

static void tty_end(void)
{
	if (g_kbdfd < 0)
		return;

	if (ioctl(g_kbdfd, KDSETMODE, KD_TEXT) == -1)
		perror(PFX "KDSETMODE KD_TEXT");

	if (tcsetattr(g_kbdfd, TCSAFLUSH, &g_kbd_termios_saved) == -1)
		perror(PFX "tcsetattr");

	close(g_kbdfd);
	g_kbdfd = -1;
}

int xenv_init(int *have_mouse_events, const char *window_title)
{
	int have_mouse = 0;
	int ret;

	ret = x11h_init(window_title);
	if (ret == 0) {
		have_mouse = 1;
		goto out;
	}

	ret = tty_init();
	if (ret == 0)
		goto out;

	fprintf(stderr, PFX "error: both x11h_init and tty_init failed\n");
	ret = -1;
out:
	if (have_mouse_events != NULL)
		*have_mouse_events = have_mouse;
	return ret;
}

int xenv_update(int (*key_cb)(void *cb_arg, int kc, int is_pressed),
		int (*mouseb_cb)(void *cb_arg, int x, int y, int button, int is_pressed),
		int (*mousem_cb)(void *cb_arg, int x, int y),
		void *cb_arg)
{
	if (g_xstuff.display) {
		x11h_update(key_cb, mouseb_cb, mousem_cb, cb_arg);
		return 0;
	}

	// TODO: read tty?
	return -1;
}

/* blocking minimize until user maximizes again */
int xenv_minimize(void)
{
	int ret;

	if (g_xstuff.display) {
		xenv_update(NULL, NULL, NULL, NULL);
		ret = x11h_minimize();
		xenv_update(NULL, NULL, NULL, NULL);
		return ret;
	}

	return -1;
}

void xenv_finish(void)
{
	// TODO: cleanup X?
	tty_end();
}

#if 0
int main()
{
	int i, r, d;

	xenv_init("just a test");

	for (i = 0; i < 5; i++) {
		while ((r = xenv_update(&d)) > 0)
			printf("%d %x %d\n", d, r, r);
		sleep(1);

		if (i == 1)
			xenv_minimize();
		printf("ll %d\n", i);
	}

	printf("xenv_finish..\n");
	xenv_finish();

	return 0;
}
#endif
Commit	Line	Data
	1	/*
	2	* (C) Gražvydas "notaz" Ignotas, 2009-2012
	3	*
	4	* This work is licensed under the terms of any of these licenses
	5	* (at your option):
	6	* - GNU GPL, version 2 or later.
	7	* - GNU LGPL, version 2.1 or later.
	8	* See the COPYING file in the top-level directory.
	9	*/
	10
	11	#include <stdio.h>
	12	#include <string.h>
	13	#include <pthread.h>
	14
	15	#include <dlfcn.h>
	16	#include <X11/Xlib.h>
	17	#include <X11/Xutil.h>
	18	#include <X11/XKBlib.h>
	19
	20	#include <sys/types.h>
	21	#include <sys/stat.h>
	22	#include <fcntl.h>
	23	#include <unistd.h>
	24	#include <sys/ioctl.h>
	25	#include <termios.h>
	26	#include <linux/kd.h>
	27
	28	#define PFX "xenv: "
	29
	30	#define FPTR(f) typeof(f) * p##f
	31	#define FPTR_LINK(xf, dl, f) { \
	32	xf.p##f = dlsym(dl, #f); \
	33	if (xf.p##f == NULL) { \
	34	fprintf(stderr, "missing symbol: %s\n", #f); \
	35	goto fail; \
	36	} \
	37	}
	38
	39	struct xstuff {
	40	Display *display;
	41	Window window;
	42	FPTR(XCreateBitmapFromData);
	43	FPTR(XCreatePixmapCursor);
	44	FPTR(XFreePixmap);
	45	FPTR(XOpenDisplay);
	46	FPTR(XDisplayName);
	47	FPTR(XCloseDisplay);
	48	FPTR(XCreateSimpleWindow);
	49	FPTR(XChangeWindowAttributes);
	50	FPTR(XSelectInput);
	51	FPTR(XMapWindow);
	52	FPTR(XNextEvent);
	53	FPTR(XCheckTypedEvent);
	54	FPTR(XWithdrawWindow);
	55	FPTR(XGrabKeyboard);
	56	FPTR(XPending);
	57	FPTR(XLookupKeysym);
	58	FPTR(XkbSetDetectableAutoRepeat);
	59	FPTR(XStoreName);
	60	FPTR(XIconifyWindow);
	61	FPTR(XMoveResizeWindow);
	62	FPTR(XInternAtom);
	63	FPTR(XSetWMHints);
	64	FPTR(XSync);
	65	};
	66
	67	static struct xstuff g_xstuff;
	68
	69	static Cursor transparent_cursor(struct xstuff xf, Display display, Window win)
	70	{
	71	Cursor cursor;
	72	Pixmap pix;
	73	XColor dummy;
	74	char d = 0;
	75
	76	memset(&dummy, 0, sizeof(dummy));
	77	pix = xf->pXCreateBitmapFromData(display, win, &d, 1, 1);
	78	cursor = xf->pXCreatePixmapCursor(display, pix, pix,
	79	&dummy, &dummy, 0, 0);
	80	xf->pXFreePixmap(display, pix);
	81	return cursor;
	82	}
	83
	84	static int x11h_init(const char *window_title)
	85	{
	86	unsigned int display_width, display_height;
	87	Display *display;
	88	XSetWindowAttributes attributes;
	89	Window win;
	90	Visual *visual;
	91	void *x11lib;
	92	int screen;
	93
	94	memset(&g_xstuff, 0, sizeof(g_xstuff));
	95	x11lib = dlopen("libX11.so.6", RTLD_LAZY);
	96	if (x11lib == NULL) {
	97	fprintf(stderr, "libX11.so load failed:\n%s\n", dlerror());
	98	goto fail;
	99	}
	100	FPTR_LINK(g_xstuff, x11lib, XCreateBitmapFromData);
	101	FPTR_LINK(g_xstuff, x11lib, XCreatePixmapCursor);
	102	FPTR_LINK(g_xstuff, x11lib, XFreePixmap);
	103	FPTR_LINK(g_xstuff, x11lib, XOpenDisplay);
	104	FPTR_LINK(g_xstuff, x11lib, XDisplayName);
	105	FPTR_LINK(g_xstuff, x11lib, XCloseDisplay);
	106	FPTR_LINK(g_xstuff, x11lib, XCreateSimpleWindow);
	107	FPTR_LINK(g_xstuff, x11lib, XChangeWindowAttributes);
	108	FPTR_LINK(g_xstuff, x11lib, XSelectInput);
	109	FPTR_LINK(g_xstuff, x11lib, XMapWindow);
	110	FPTR_LINK(g_xstuff, x11lib, XNextEvent);
	111	FPTR_LINK(g_xstuff, x11lib, XCheckTypedEvent);
	112	FPTR_LINK(g_xstuff, x11lib, XWithdrawWindow);
	113	FPTR_LINK(g_xstuff, x11lib, XGrabKeyboard);
	114	FPTR_LINK(g_xstuff, x11lib, XPending);
	115	FPTR_LINK(g_xstuff, x11lib, XLookupKeysym);
	116	FPTR_LINK(g_xstuff, x11lib, XkbSetDetectableAutoRepeat);
	117	FPTR_LINK(g_xstuff, x11lib, XStoreName);
	118	FPTR_LINK(g_xstuff, x11lib, XIconifyWindow);
	119	FPTR_LINK(g_xstuff, x11lib, XMoveResizeWindow);
	120	FPTR_LINK(g_xstuff, x11lib, XInternAtom);
	121	FPTR_LINK(g_xstuff, x11lib, XSetWMHints);
	122	FPTR_LINK(g_xstuff, x11lib, XSync);
	123
	124	//XInitThreads();
	125
	126	g_xstuff.display = display = g_xstuff.pXOpenDisplay(NULL);
	127	if (display == NULL)
	128	{
	129	fprintf(stderr, "cannot connect to X server %s, X handling disabled.\n",
	130	g_xstuff.pXDisplayName(NULL));
	131	goto fail2;
	132	}
	133
	134	visual = DefaultVisual(display, 0);
	135	if (visual->class != TrueColor)
	136	fprintf(stderr, PFX "warning: non true color visual\n");
	137
	138	printf(PFX "X vendor: %s, rel: %d, display: %s, protocol ver: %d.%d\n", ServerVendor(display),
	139	VendorRelease(display), DisplayString(display), ProtocolVersion(display),
	140	ProtocolRevision(display));
	141
	142	screen = DefaultScreen(display);
	143
	144	display_width = DisplayWidth(display, screen);
	145	display_height = DisplayHeight(display, screen);
	146	printf(PFX "display is %dx%d\n", display_width, display_height);
	147
	148	g_xstuff.window = win = g_xstuff.pXCreateSimpleWindow(display,
	149	RootWindow(display, screen), 0, 0, display_width, display_height,
	150	0, BlackPixel(display, screen), BlackPixel(display, screen));
	151
	152	attributes.override_redirect = True;
	153	attributes.cursor = transparent_cursor(&g_xstuff, display, win);
	154	g_xstuff.pXChangeWindowAttributes(display, win, CWOverrideRedirect \| CWCursor, &attributes);
	155
	156	g_xstuff.pXStoreName(display, win, window_title);
	157	g_xstuff.pXSelectInput(display, win, ExposureMask \| FocusChangeMask
	158	\| KeyPressMask \| KeyReleaseMask \| ButtonPressMask
	159	\| ButtonReleaseMask \| PointerMotionMask \| PropertyChangeMask);
	160	g_xstuff.pXMapWindow(display, win);
	161	g_xstuff.pXGrabKeyboard(display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
	162	g_xstuff.pXkbSetDetectableAutoRepeat(display, 1, NULL);
	163	// XSetIOErrorHandler
	164
	165	// we don't know when event dispatch will be called, so sync now
	166	g_xstuff.pXSync(display, False);
	167
	168	return 0;
	169	fail2:
	170	dlclose(x11lib);
	171	fail:
	172	g_xstuff.display = NULL;
	173	fprintf(stderr, "x11 handling disabled.\n");
	174	return -1;
	175	}
	176
	177	static void x11h_update(int (key_cb)(void cb_arg, int kc, int is_pressed),
	178	int (mouseb_cb)(void cb_arg, int x, int y, int button, int is_pressed),
	179	int (mousem_cb)(void cb_arg, int x, int y),
	180	void *cb_arg)
	181	{
	182	XEvent evt;
	183	int keysym;
	184
	185	while (g_xstuff.pXPending(g_xstuff.display))
	186	{
	187	g_xstuff.pXNextEvent(g_xstuff.display, &evt);
	188	switch (evt.type)
	189	{
	190	case Expose:
	191	while (g_xstuff.pXCheckTypedEvent(g_xstuff.display, Expose, &evt))
	192	;
	193	break;
	194
	195	case KeyPress:
	196	keysym = g_xstuff.pXLookupKeysym(&evt.xkey, 0);
	197	if (key_cb != NULL)
	198	key_cb(cb_arg, keysym, 1);
	199	break;
	200
	201	case KeyRelease:
	202	keysym = g_xstuff.pXLookupKeysym(&evt.xkey, 0);
	203	if (key_cb != NULL)
	204	key_cb(cb_arg, keysym, 0);
	205	break;
	206
	207	case ButtonPress:
	208	if (mouseb_cb != NULL)
	209	mouseb_cb(cb_arg, evt.xbutton.x, evt.xbutton.y,
	210	evt.xbutton.button, 1);
	211	break;
	212
	213	case ButtonRelease:
	214	if (mouseb_cb != NULL)
	215	mouseb_cb(cb_arg, evt.xbutton.x, evt.xbutton.y,
	216	evt.xbutton.button, 0);
	217	break;
	218
	219	case MotionNotify:
	220	if (mousem_cb != NULL)
	221	mousem_cb(cb_arg, evt.xmotion.x, evt.xmotion.y);
	222	break;
	223	}
	224	}
	225	}
	226
	227	static void x11h_wait_vmstate(void)
	228	{
	229	Atom wm_state = g_xstuff.pXInternAtom(g_xstuff.display, "WM_STATE", False);
	230	XEvent evt;
	231	int i;
	232
	233	usleep(20000);
	234
	235	for (i = 0; i < 20; i++) {
	236	while (g_xstuff.pXPending(g_xstuff.display)) {
	237	g_xstuff.pXNextEvent(g_xstuff.display, &evt);
	238	// printf("w event %d\n", evt.type);
	239	if (evt.type == PropertyNotify && evt.xproperty.atom == wm_state)
	240	return;
	241	}
	242	usleep(200000);
	243	}
	244
	245	fprintf(stderr, PFX "timeout waiting for wm_state change\n");
	246	}
	247
	248	static int x11h_minimize(void)
	249	{
	250	XSetWindowAttributes attributes;
	251	Display *display = g_xstuff.display;
	252	Window window = g_xstuff.window;
	253	int screen = DefaultScreen(g_xstuff.display);
	254	int display_width, display_height;
	255	XWMHints wm_hints;
	256	XEvent evt;
	257
	258	g_xstuff.pXWithdrawWindow(display, window, screen);
	259
	260	attributes.override_redirect = False;
	261	g_xstuff.pXChangeWindowAttributes(display, window,
	262	CWOverrideRedirect, &attributes);
	263
	264	wm_hints.flags = StateHint;
	265	wm_hints.initial_state = IconicState;
	266	g_xstuff.pXSetWMHints(display, window, &wm_hints);
	267
	268	g_xstuff.pXMapWindow(display, window);
	269
	270	while (g_xstuff.pXNextEvent(display, &evt) == 0)
	271	{
	272	// printf("m event %d\n", evt.type);
	273	switch (evt.type)
	274	{
	275	case FocusIn:
	276	goto out;
	277	default:
	278	break;
	279	}
	280	}
	281
	282	out:
	283	g_xstuff.pXWithdrawWindow(display, window, screen);
	284
	285	// must wait for some magic vmstate property change before setting override_redirect
	286	x11h_wait_vmstate();
	287
	288	attributes.override_redirect = True;
	289	g_xstuff.pXChangeWindowAttributes(display, window,
	290	CWOverrideRedirect, &attributes);
	291
	292	// fixup window after resize on override_redirect loss
	293	display_width = DisplayWidth(display, screen);
	294	display_height = DisplayHeight(display, screen);
	295	g_xstuff.pXMoveResizeWindow(display, window, 0, 0, display_width, display_height);
	296
	297	g_xstuff.pXMapWindow(display, window);
	298	g_xstuff.pXGrabKeyboard(display, window, False, GrabModeAsync, GrabModeAsync, CurrentTime);
	299	g_xstuff.pXkbSetDetectableAutoRepeat(display, 1, NULL);
	300
	301	// we don't know when event dispatch will be called, so sync now
	302	g_xstuff.pXSync(display, False);
	303
	304	return 0;
	305	}
	306
	307	static struct termios g_kbd_termios_saved;
	308	static int g_kbdfd = -1;
	309
	310	static int tty_init(void)
	311	{
	312	struct termios kbd_termios;
	313	int mode;
	314
	315	g_kbdfd = open("/dev/tty", O_RDWR);
	316	if (g_kbdfd == -1) {
	317	perror(PFX "open /dev/tty");
	318	return -1;
	319	}
	320
	321	if (ioctl(g_kbdfd, KDGETMODE, &mode) == -1) {
	322	perror(PFX "(not hiding FB): KDGETMODE");
	323	goto fail;
	324	}
	325
	326	if (tcgetattr(g_kbdfd, &kbd_termios) == -1) {
	327	perror(PFX "tcgetattr");
	328	goto fail;
	329	}
	330
	331	g_kbd_termios_saved = kbd_termios;
	332	kbd_termios.c_lflag &= ~(ICANON \| ECHO); // \| ISIG);
	333	kbd_termios.c_iflag &= ~(ISTRIP \| IGNCR \| ICRNL \| INLCR \| IXOFF \| IXON);
	334	kbd_termios.c_cc[VMIN] = 0;
	335	kbd_termios.c_cc[VTIME] = 0;
	336
	337	if (tcsetattr(g_kbdfd, TCSAFLUSH, &kbd_termios) == -1) {
	338	perror(PFX "tcsetattr");
	339	goto fail;
	340	}
	341
	342	if (ioctl(g_kbdfd, KDSETMODE, KD_GRAPHICS) == -1) {
	343	perror(PFX "KDSETMODE KD_GRAPHICS");
	344	tcsetattr(g_kbdfd, TCSAFLUSH, &g_kbd_termios_saved);
	345	goto fail;
	346	}
	347
	348	return 0;
	349
	350	fail:
	351	close(g_kbdfd);
	352	g_kbdfd = -1;
	353	return -1;
	354	}
	355
	356	static void tty_end(void)
	357	{
	358	if (g_kbdfd < 0)
	359	return;
	360
	361	if (ioctl(g_kbdfd, KDSETMODE, KD_TEXT) == -1)
	362	perror(PFX "KDSETMODE KD_TEXT");
	363
	364	if (tcsetattr(g_kbdfd, TCSAFLUSH, &g_kbd_termios_saved) == -1)
	365	perror(PFX "tcsetattr");
	366
	367	close(g_kbdfd);
	368	g_kbdfd = -1;
	369	}
	370
	371	int xenv_init(int have_mouse_events, const char window_title)
	372	{
	373	int have_mouse = 0;
	374	int ret;
	375
	376	ret = x11h_init(window_title);
	377	if (ret == 0) {
	378	have_mouse = 1;
	379	goto out;
	380	}
	381
	382	ret = tty_init();
	383	if (ret == 0)
	384	goto out;
	385
	386	fprintf(stderr, PFX "error: both x11h_init and tty_init failed\n");
	387	ret = -1;
	388	out:
	389	if (have_mouse_events != NULL)
	390	*have_mouse_events = have_mouse;
	391	return ret;
	392	}
	393
	394	int xenv_update(int (key_cb)(void cb_arg, int kc, int is_pressed),
	395	int (mouseb_cb)(void cb_arg, int x, int y, int button, int is_pressed),
	396	int (mousem_cb)(void cb_arg, int x, int y),
	397	void *cb_arg)
	398	{
	399	if (g_xstuff.display) {
	400	x11h_update(key_cb, mouseb_cb, mousem_cb, cb_arg);
	401	return 0;
	402	}
	403
	404	// TODO: read tty?
	405	return -1;
	406	}
	407
	408	/* blocking minimize until user maximizes again */
	409	int xenv_minimize(void)
	410	{
	411	int ret;
	412
	413	if (g_xstuff.display) {
	414	xenv_update(NULL, NULL, NULL, NULL);
	415	ret = x11h_minimize();
	416	xenv_update(NULL, NULL, NULL, NULL);
	417	return ret;
	418	}
	419
	420	return -1;
	421	}
	422
	423	void xenv_finish(void)
	424	{
	425	// TODO: cleanup X?
	426	tty_end();
	427	}
	428
	429	#if 0
	430	int main()
	431	{
	432	int i, r, d;
	433
	434	xenv_init("just a test");
	435
	436	for (i = 0; i < 5; i++) {
	437	while ((r = xenv_update(&d)) > 0)
	438	printf("%d %x %d\n", d, r, r);
	439	sleep(1);
	440
	441	if (i == 1)
	442	xenv_minimize();
	443	printf("ll %d\n", i);
	444	}
	445
	446	printf("xenv_finish..\n");
	447	xenv_finish();
	448
	449	return 0;
	450	}
	451	#endif