| 1 | /* |
| 2 | * (C) GraÅžvydas "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 | #include "xenv.h" |
| 29 | |
| 30 | #define PFX "xenv: " |
| 31 | |
| 32 | #define FPTR(f) typeof(f) * p##f |
| 33 | #define FPTR_LINK(xf, dl, f) { \ |
| 34 | xf.p##f = dlsym(dl, #f); \ |
| 35 | if (xf.p##f == NULL) { \ |
| 36 | fprintf(stderr, "missing symbol: %s\n", #f); \ |
| 37 | goto fail; \ |
| 38 | } \ |
| 39 | } |
| 40 | |
| 41 | struct xstuff { |
| 42 | Display *display; |
| 43 | Window window; |
| 44 | FPTR(XCreateBitmapFromData); |
| 45 | FPTR(XCreatePixmapCursor); |
| 46 | FPTR(XFreePixmap); |
| 47 | FPTR(XOpenDisplay); |
| 48 | FPTR(XDisplayName); |
| 49 | FPTR(XCloseDisplay); |
| 50 | FPTR(XCreateSimpleWindow); |
| 51 | FPTR(XChangeWindowAttributes); |
| 52 | FPTR(XSelectInput); |
| 53 | FPTR(XMapWindow); |
| 54 | FPTR(XNextEvent); |
| 55 | FPTR(XCheckTypedEvent); |
| 56 | FPTR(XWithdrawWindow); |
| 57 | FPTR(XGrabKeyboard); |
| 58 | FPTR(XPending); |
| 59 | FPTR(XLookupKeysym); |
| 60 | FPTR(XkbSetDetectableAutoRepeat); |
| 61 | FPTR(XStoreName); |
| 62 | FPTR(XIconifyWindow); |
| 63 | FPTR(XMoveResizeWindow); |
| 64 | FPTR(XInternAtom); |
| 65 | FPTR(XSetWMHints); |
| 66 | FPTR(XSync); |
| 67 | }; |
| 68 | |
| 69 | static struct xstuff g_xstuff; |
| 70 | |
| 71 | static Cursor transparent_cursor(struct xstuff *xf, Display *display, Window win) |
| 72 | { |
| 73 | Cursor cursor; |
| 74 | Pixmap pix; |
| 75 | XColor dummy; |
| 76 | char d = 0; |
| 77 | |
| 78 | memset(&dummy, 0, sizeof(dummy)); |
| 79 | pix = xf->pXCreateBitmapFromData(display, win, &d, 1, 1); |
| 80 | cursor = xf->pXCreatePixmapCursor(display, pix, pix, |
| 81 | &dummy, &dummy, 0, 0); |
| 82 | xf->pXFreePixmap(display, pix); |
| 83 | return cursor; |
| 84 | } |
| 85 | |
| 86 | static int x11h_init(int *xenv_flags, const char *window_title) |
| 87 | { |
| 88 | unsigned int display_width, display_height; |
| 89 | Display *display; |
| 90 | XSetWindowAttributes attributes; |
| 91 | Window win; |
| 92 | Visual *visual; |
| 93 | long evt_mask; |
| 94 | void *x11lib; |
| 95 | int screen; |
| 96 | |
| 97 | memset(&g_xstuff, 0, sizeof(g_xstuff)); |
| 98 | x11lib = dlopen("libX11.so.6", RTLD_LAZY); |
| 99 | if (x11lib == NULL) { |
| 100 | fprintf(stderr, "libX11.so load failed:\n%s\n", dlerror()); |
| 101 | goto fail; |
| 102 | } |
| 103 | FPTR_LINK(g_xstuff, x11lib, XCreateBitmapFromData); |
| 104 | FPTR_LINK(g_xstuff, x11lib, XCreatePixmapCursor); |
| 105 | FPTR_LINK(g_xstuff, x11lib, XFreePixmap); |
| 106 | FPTR_LINK(g_xstuff, x11lib, XOpenDisplay); |
| 107 | FPTR_LINK(g_xstuff, x11lib, XDisplayName); |
| 108 | FPTR_LINK(g_xstuff, x11lib, XCloseDisplay); |
| 109 | FPTR_LINK(g_xstuff, x11lib, XCreateSimpleWindow); |
| 110 | FPTR_LINK(g_xstuff, x11lib, XChangeWindowAttributes); |
| 111 | FPTR_LINK(g_xstuff, x11lib, XSelectInput); |
| 112 | FPTR_LINK(g_xstuff, x11lib, XMapWindow); |
| 113 | FPTR_LINK(g_xstuff, x11lib, XNextEvent); |
| 114 | FPTR_LINK(g_xstuff, x11lib, XCheckTypedEvent); |
| 115 | FPTR_LINK(g_xstuff, x11lib, XWithdrawWindow); |
| 116 | FPTR_LINK(g_xstuff, x11lib, XGrabKeyboard); |
| 117 | FPTR_LINK(g_xstuff, x11lib, XPending); |
| 118 | FPTR_LINK(g_xstuff, x11lib, XLookupKeysym); |
| 119 | FPTR_LINK(g_xstuff, x11lib, XkbSetDetectableAutoRepeat); |
| 120 | FPTR_LINK(g_xstuff, x11lib, XStoreName); |
| 121 | FPTR_LINK(g_xstuff, x11lib, XIconifyWindow); |
| 122 | FPTR_LINK(g_xstuff, x11lib, XMoveResizeWindow); |
| 123 | FPTR_LINK(g_xstuff, x11lib, XInternAtom); |
| 124 | FPTR_LINK(g_xstuff, x11lib, XSetWMHints); |
| 125 | FPTR_LINK(g_xstuff, x11lib, XSync); |
| 126 | |
| 127 | //XInitThreads(); |
| 128 | |
| 129 | g_xstuff.display = display = g_xstuff.pXOpenDisplay(NULL); |
| 130 | if (display == NULL) |
| 131 | { |
| 132 | fprintf(stderr, "cannot connect to X server %s, X handling disabled.\n", |
| 133 | g_xstuff.pXDisplayName(NULL)); |
| 134 | goto fail2; |
| 135 | } |
| 136 | |
| 137 | visual = DefaultVisual(display, 0); |
| 138 | if (visual->class != TrueColor) |
| 139 | fprintf(stderr, PFX "warning: non true color visual\n"); |
| 140 | |
| 141 | printf(PFX "X vendor: %s, rel: %d, display: %s, protocol ver: %d.%d\n", ServerVendor(display), |
| 142 | VendorRelease(display), DisplayString(display), ProtocolVersion(display), |
| 143 | ProtocolRevision(display)); |
| 144 | |
| 145 | screen = DefaultScreen(display); |
| 146 | |
| 147 | display_width = DisplayWidth(display, screen); |
| 148 | display_height = DisplayHeight(display, screen); |
| 149 | printf(PFX "display is %dx%d\n", display_width, display_height); |
| 150 | |
| 151 | g_xstuff.window = win = g_xstuff.pXCreateSimpleWindow(display, |
| 152 | RootWindow(display, screen), 0, 0, display_width, display_height, |
| 153 | 0, BlackPixel(display, screen), BlackPixel(display, screen)); |
| 154 | |
| 155 | attributes.override_redirect = True; |
| 156 | attributes.cursor = transparent_cursor(&g_xstuff, display, win); |
| 157 | g_xstuff.pXChangeWindowAttributes(display, win, CWOverrideRedirect | CWCursor, &attributes); |
| 158 | |
| 159 | if (window_title != NULL) |
| 160 | g_xstuff.pXStoreName(display, win, window_title); |
| 161 | evt_mask = ExposureMask | FocusChangeMask | PropertyChangeMask; |
| 162 | if (xenv_flags && (*xenv_flags & XENV_CAP_KEYS)) |
| 163 | evt_mask |= KeyPressMask | KeyReleaseMask; |
| 164 | if (xenv_flags && (*xenv_flags & XENV_CAP_MOUSE)) |
| 165 | evt_mask |= ButtonPressMask | ButtonReleaseMask | PointerMotionMask; |
| 166 | g_xstuff.pXSelectInput(display, win, evt_mask); |
| 167 | g_xstuff.pXMapWindow(display, win); |
| 168 | g_xstuff.pXGrabKeyboard(display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime); |
| 169 | g_xstuff.pXkbSetDetectableAutoRepeat(display, 1, NULL); |
| 170 | // XSetIOErrorHandler |
| 171 | |
| 172 | // we don't know when event dispatch will be called, so sync now |
| 173 | g_xstuff.pXSync(display, False); |
| 174 | |
| 175 | return 0; |
| 176 | fail2: |
| 177 | dlclose(x11lib); |
| 178 | fail: |
| 179 | g_xstuff.display = NULL; |
| 180 | fprintf(stderr, "x11 handling disabled.\n"); |
| 181 | return -1; |
| 182 | } |
| 183 | |
| 184 | static void x11h_update(int (*key_cb)(void *cb_arg, int kc, int is_pressed), |
| 185 | int (*mouseb_cb)(void *cb_arg, int x, int y, int button, int is_pressed), |
| 186 | int (*mousem_cb)(void *cb_arg, int x, int y), |
| 187 | void *cb_arg) |
| 188 | { |
| 189 | XEvent evt; |
| 190 | int keysym; |
| 191 | |
| 192 | while (g_xstuff.pXPending(g_xstuff.display)) |
| 193 | { |
| 194 | g_xstuff.pXNextEvent(g_xstuff.display, &evt); |
| 195 | switch (evt.type) |
| 196 | { |
| 197 | case Expose: |
| 198 | while (g_xstuff.pXCheckTypedEvent(g_xstuff.display, Expose, &evt)) |
| 199 | ; |
| 200 | break; |
| 201 | |
| 202 | case KeyPress: |
| 203 | keysym = g_xstuff.pXLookupKeysym(&evt.xkey, 0); |
| 204 | if (key_cb != NULL) |
| 205 | key_cb(cb_arg, keysym, 1); |
| 206 | break; |
| 207 | |
| 208 | case KeyRelease: |
| 209 | keysym = g_xstuff.pXLookupKeysym(&evt.xkey, 0); |
| 210 | if (key_cb != NULL) |
| 211 | key_cb(cb_arg, keysym, 0); |
| 212 | break; |
| 213 | |
| 214 | case ButtonPress: |
| 215 | if (mouseb_cb != NULL) |
| 216 | mouseb_cb(cb_arg, evt.xbutton.x, evt.xbutton.y, |
| 217 | evt.xbutton.button, 1); |
| 218 | break; |
| 219 | |
| 220 | case ButtonRelease: |
| 221 | if (mouseb_cb != NULL) |
| 222 | mouseb_cb(cb_arg, evt.xbutton.x, evt.xbutton.y, |
| 223 | evt.xbutton.button, 0); |
| 224 | break; |
| 225 | |
| 226 | case MotionNotify: |
| 227 | if (mousem_cb != NULL) |
| 228 | mousem_cb(cb_arg, evt.xmotion.x, evt.xmotion.y); |
| 229 | break; |
| 230 | } |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | static void x11h_wait_vmstate(void) |
| 235 | { |
| 236 | Atom wm_state = g_xstuff.pXInternAtom(g_xstuff.display, "WM_STATE", False); |
| 237 | XEvent evt; |
| 238 | int i; |
| 239 | |
| 240 | usleep(20000); |
| 241 | |
| 242 | for (i = 0; i < 20; i++) { |
| 243 | while (g_xstuff.pXPending(g_xstuff.display)) { |
| 244 | g_xstuff.pXNextEvent(g_xstuff.display, &evt); |
| 245 | // printf("w event %d\n", evt.type); |
| 246 | if (evt.type == PropertyNotify && evt.xproperty.atom == wm_state) |
| 247 | return; |
| 248 | } |
| 249 | usleep(200000); |
| 250 | } |
| 251 | |
| 252 | fprintf(stderr, PFX "timeout waiting for wm_state change\n"); |
| 253 | } |
| 254 | |
| 255 | static int x11h_minimize(void) |
| 256 | { |
| 257 | XSetWindowAttributes attributes; |
| 258 | Display *display = g_xstuff.display; |
| 259 | Window window = g_xstuff.window; |
| 260 | int screen = DefaultScreen(g_xstuff.display); |
| 261 | int display_width, display_height; |
| 262 | XWMHints wm_hints; |
| 263 | XEvent evt; |
| 264 | |
| 265 | g_xstuff.pXWithdrawWindow(display, window, screen); |
| 266 | |
| 267 | attributes.override_redirect = False; |
| 268 | g_xstuff.pXChangeWindowAttributes(display, window, |
| 269 | CWOverrideRedirect, &attributes); |
| 270 | |
| 271 | wm_hints.flags = StateHint; |
| 272 | wm_hints.initial_state = IconicState; |
| 273 | g_xstuff.pXSetWMHints(display, window, &wm_hints); |
| 274 | |
| 275 | g_xstuff.pXMapWindow(display, window); |
| 276 | |
| 277 | while (g_xstuff.pXNextEvent(display, &evt) == 0) |
| 278 | { |
| 279 | // printf("m event %d\n", evt.type); |
| 280 | switch (evt.type) |
| 281 | { |
| 282 | case FocusIn: |
| 283 | goto out; |
| 284 | default: |
| 285 | break; |
| 286 | } |
| 287 | } |
| 288 | |
| 289 | out: |
| 290 | g_xstuff.pXWithdrawWindow(display, window, screen); |
| 291 | |
| 292 | // must wait for some magic vmstate property change before setting override_redirect |
| 293 | x11h_wait_vmstate(); |
| 294 | |
| 295 | attributes.override_redirect = True; |
| 296 | g_xstuff.pXChangeWindowAttributes(display, window, |
| 297 | CWOverrideRedirect, &attributes); |
| 298 | |
| 299 | // fixup window after resize on override_redirect loss |
| 300 | display_width = DisplayWidth(display, screen); |
| 301 | display_height = DisplayHeight(display, screen); |
| 302 | g_xstuff.pXMoveResizeWindow(display, window, 0, 0, display_width, display_height); |
| 303 | |
| 304 | g_xstuff.pXMapWindow(display, window); |
| 305 | g_xstuff.pXGrabKeyboard(display, window, False, GrabModeAsync, GrabModeAsync, CurrentTime); |
| 306 | g_xstuff.pXkbSetDetectableAutoRepeat(display, 1, NULL); |
| 307 | |
| 308 | // we don't know when event dispatch will be called, so sync now |
| 309 | g_xstuff.pXSync(display, False); |
| 310 | |
| 311 | return 0; |
| 312 | } |
| 313 | |
| 314 | static struct termios g_kbd_termios_saved; |
| 315 | static int g_kbdfd = -1; |
| 316 | |
| 317 | static int tty_init(void) |
| 318 | { |
| 319 | struct termios kbd_termios; |
| 320 | int mode; |
| 321 | |
| 322 | g_kbdfd = open("/dev/tty", O_RDWR); |
| 323 | if (g_kbdfd == -1) { |
| 324 | perror(PFX "open /dev/tty"); |
| 325 | return -1; |
| 326 | } |
| 327 | |
| 328 | if (ioctl(g_kbdfd, KDGETMODE, &mode) == -1) { |
| 329 | perror(PFX "(not hiding FB): KDGETMODE"); |
| 330 | goto fail; |
| 331 | } |
| 332 | |
| 333 | if (tcgetattr(g_kbdfd, &kbd_termios) == -1) { |
| 334 | perror(PFX "tcgetattr"); |
| 335 | goto fail; |
| 336 | } |
| 337 | |
| 338 | g_kbd_termios_saved = kbd_termios; |
| 339 | kbd_termios.c_lflag &= ~(ICANON | ECHO); // | ISIG); |
| 340 | kbd_termios.c_iflag &= ~(ISTRIP | IGNCR | ICRNL | INLCR | IXOFF | IXON); |
| 341 | kbd_termios.c_cc[VMIN] = 0; |
| 342 | kbd_termios.c_cc[VTIME] = 0; |
| 343 | |
| 344 | if (tcsetattr(g_kbdfd, TCSAFLUSH, &kbd_termios) == -1) { |
| 345 | perror(PFX "tcsetattr"); |
| 346 | goto fail; |
| 347 | } |
| 348 | |
| 349 | if (ioctl(g_kbdfd, KDSETMODE, KD_GRAPHICS) == -1) { |
| 350 | perror(PFX "KDSETMODE KD_GRAPHICS"); |
| 351 | tcsetattr(g_kbdfd, TCSAFLUSH, &g_kbd_termios_saved); |
| 352 | goto fail; |
| 353 | } |
| 354 | |
| 355 | return 0; |
| 356 | |
| 357 | fail: |
| 358 | close(g_kbdfd); |
| 359 | g_kbdfd = -1; |
| 360 | return -1; |
| 361 | } |
| 362 | |
| 363 | static void tty_end(void) |
| 364 | { |
| 365 | if (g_kbdfd < 0) |
| 366 | return; |
| 367 | |
| 368 | if (ioctl(g_kbdfd, KDSETMODE, KD_TEXT) == -1) |
| 369 | perror(PFX "KDSETMODE KD_TEXT"); |
| 370 | |
| 371 | if (tcsetattr(g_kbdfd, TCSAFLUSH, &g_kbd_termios_saved) == -1) |
| 372 | perror(PFX "tcsetattr"); |
| 373 | |
| 374 | close(g_kbdfd); |
| 375 | g_kbdfd = -1; |
| 376 | } |
| 377 | |
| 378 | int xenv_init(int *xenv_flags, const char *window_title) |
| 379 | { |
| 380 | int ret; |
| 381 | |
| 382 | ret = x11h_init(xenv_flags, window_title); |
| 383 | if (ret == 0) |
| 384 | goto out; |
| 385 | |
| 386 | if (xenv_flags != NULL) |
| 387 | *xenv_flags &= ~(XENV_CAP_KEYS | XENV_CAP_MOUSE); /* TODO? */ |
| 388 | ret = tty_init(); |
| 389 | if (ret == 0) |
| 390 | goto out; |
| 391 | |
| 392 | fprintf(stderr, PFX "error: both x11h_init and tty_init failed\n"); |
| 393 | ret = -1; |
| 394 | out: |
| 395 | return ret; |
| 396 | } |
| 397 | |
| 398 | int xenv_update(int (*key_cb)(void *cb_arg, int kc, int is_pressed), |
| 399 | int (*mouseb_cb)(void *cb_arg, int x, int y, int button, int is_pressed), |
| 400 | int (*mousem_cb)(void *cb_arg, int x, int y), |
| 401 | void *cb_arg) |
| 402 | { |
| 403 | if (g_xstuff.display) { |
| 404 | x11h_update(key_cb, mouseb_cb, mousem_cb, cb_arg); |
| 405 | return 0; |
| 406 | } |
| 407 | |
| 408 | // TODO: read tty? |
| 409 | return -1; |
| 410 | } |
| 411 | |
| 412 | /* blocking minimize until user maximizes again */ |
| 413 | int xenv_minimize(void) |
| 414 | { |
| 415 | int ret; |
| 416 | |
| 417 | if (g_xstuff.display) { |
| 418 | xenv_update(NULL, NULL, NULL, NULL); |
| 419 | ret = x11h_minimize(); |
| 420 | xenv_update(NULL, NULL, NULL, NULL); |
| 421 | return ret; |
| 422 | } |
| 423 | |
| 424 | return -1; |
| 425 | } |
| 426 | |
| 427 | void xenv_finish(void) |
| 428 | { |
| 429 | // TODO: cleanup X? |
| 430 | tty_end(); |
| 431 | } |
| 432 | |
| 433 | #if 0 |
| 434 | int main() |
| 435 | { |
| 436 | int i, r, d; |
| 437 | |
| 438 | xenv_init("just a test"); |
| 439 | |
| 440 | for (i = 0; i < 5; i++) { |
| 441 | while ((r = xenv_update(&d)) > 0) |
| 442 | printf("%d %x %d\n", d, r, r); |
| 443 | sleep(1); |
| 444 | |
| 445 | if (i == 1) |
| 446 | xenv_minimize(); |
| 447 | printf("ll %d\n", i); |
| 448 | } |
| 449 | |
| 450 | printf("xenv_finish..\n"); |
| 451 | xenv_finish(); |
| 452 | |
| 453 | return 0; |
| 454 | } |
| 455 | #endif |