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1 | /* |
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2 | * (C) GraÅžvydas "notaz" Ignotas, 2009-2012 |
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3 | * |
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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. |
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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> |
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18 | #include <X11/XKBlib.h> |
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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 | |
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28 | #include "xenv.h" |
29 | |
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30 | #define PFX "xenv: " |
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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 | |
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41 | struct xstuff { |
42 | Display *display; |
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43 | Window window; |
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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); |
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56 | FPTR(XWithdrawWindow); |
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57 | FPTR(XGrabKeyboard); |
58 | FPTR(XPending); |
59 | FPTR(XLookupKeysym); |
60 | FPTR(XkbSetDetectableAutoRepeat); |
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61 | FPTR(XkbKeycodeToKeysym); |
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62 | FPTR(XStoreName); |
63 | FPTR(XIconifyWindow); |
64 | FPTR(XMoveResizeWindow); |
65 | FPTR(XInternAtom); |
66 | FPTR(XSetWMHints); |
67 | FPTR(XSync); |
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68 | }; |
69 | |
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70 | static struct xstuff g_xstuff; |
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71 | |
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72 | static Cursor transparent_cursor(struct xstuff *xf, Display *display, Window win) |
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73 | { |
74 | Cursor cursor; |
75 | Pixmap pix; |
76 | XColor dummy; |
77 | char d = 0; |
78 | |
79 | memset(&dummy, 0, sizeof(dummy)); |
80 | pix = xf->pXCreateBitmapFromData(display, win, &d, 1, 1); |
81 | cursor = xf->pXCreatePixmapCursor(display, pix, pix, |
82 | &dummy, &dummy, 0, 0); |
83 | xf->pXFreePixmap(display, pix); |
84 | return cursor; |
85 | } |
86 | |
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87 | static int x11h_init(int *xenv_flags, const char *window_title) |
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88 | { |
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89 | unsigned int display_width, display_height; |
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90 | Display *display; |
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91 | XSetWindowAttributes attributes; |
92 | Window win; |
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93 | Visual *visual; |
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94 | long evt_mask; |
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95 | void *x11lib; |
96 | int screen; |
97 | |
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98 | memset(&g_xstuff, 0, sizeof(g_xstuff)); |
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99 | x11lib = dlopen("libX11.so.6", RTLD_LAZY); |
100 | if (x11lib == NULL) { |
101 | fprintf(stderr, "libX11.so load failed:\n%s\n", dlerror()); |
102 | goto fail; |
103 | } |
f9b3f440 |
104 | FPTR_LINK(g_xstuff, x11lib, XCreateBitmapFromData); |
105 | FPTR_LINK(g_xstuff, x11lib, XCreatePixmapCursor); |
106 | FPTR_LINK(g_xstuff, x11lib, XFreePixmap); |
107 | FPTR_LINK(g_xstuff, x11lib, XOpenDisplay); |
108 | FPTR_LINK(g_xstuff, x11lib, XDisplayName); |
109 | FPTR_LINK(g_xstuff, x11lib, XCloseDisplay); |
110 | FPTR_LINK(g_xstuff, x11lib, XCreateSimpleWindow); |
111 | FPTR_LINK(g_xstuff, x11lib, XChangeWindowAttributes); |
112 | FPTR_LINK(g_xstuff, x11lib, XSelectInput); |
113 | FPTR_LINK(g_xstuff, x11lib, XMapWindow); |
114 | FPTR_LINK(g_xstuff, x11lib, XNextEvent); |
115 | FPTR_LINK(g_xstuff, x11lib, XCheckTypedEvent); |
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116 | FPTR_LINK(g_xstuff, x11lib, XWithdrawWindow); |
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117 | FPTR_LINK(g_xstuff, x11lib, XGrabKeyboard); |
118 | FPTR_LINK(g_xstuff, x11lib, XPending); |
119 | FPTR_LINK(g_xstuff, x11lib, XLookupKeysym); |
120 | FPTR_LINK(g_xstuff, x11lib, XkbSetDetectableAutoRepeat); |
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121 | FPTR_LINK(g_xstuff, x11lib, XkbKeycodeToKeysym); |
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122 | FPTR_LINK(g_xstuff, x11lib, XStoreName); |
123 | FPTR_LINK(g_xstuff, x11lib, XIconifyWindow); |
124 | FPTR_LINK(g_xstuff, x11lib, XMoveResizeWindow); |
125 | FPTR_LINK(g_xstuff, x11lib, XInternAtom); |
126 | FPTR_LINK(g_xstuff, x11lib, XSetWMHints); |
127 | FPTR_LINK(g_xstuff, x11lib, XSync); |
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128 | |
129 | //XInitThreads(); |
130 | |
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131 | g_xstuff.display = display = g_xstuff.pXOpenDisplay(NULL); |
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132 | if (display == NULL) |
133 | { |
134 | fprintf(stderr, "cannot connect to X server %s, X handling disabled.\n", |
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135 | g_xstuff.pXDisplayName(NULL)); |
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136 | goto fail2; |
137 | } |
138 | |
139 | visual = DefaultVisual(display, 0); |
140 | if (visual->class != TrueColor) |
141 | fprintf(stderr, PFX "warning: non true color visual\n"); |
142 | |
143 | printf(PFX "X vendor: %s, rel: %d, display: %s, protocol ver: %d.%d\n", ServerVendor(display), |
144 | VendorRelease(display), DisplayString(display), ProtocolVersion(display), |
145 | ProtocolRevision(display)); |
146 | |
147 | screen = DefaultScreen(display); |
148 | |
149 | display_width = DisplayWidth(display, screen); |
150 | display_height = DisplayHeight(display, screen); |
151 | printf(PFX "display is %dx%d\n", display_width, display_height); |
152 | |
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153 | g_xstuff.window = win = g_xstuff.pXCreateSimpleWindow(display, |
154 | RootWindow(display, screen), 0, 0, display_width, display_height, |
155 | 0, BlackPixel(display, screen), BlackPixel(display, screen)); |
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156 | |
157 | attributes.override_redirect = True; |
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158 | attributes.cursor = transparent_cursor(&g_xstuff, display, win); |
159 | g_xstuff.pXChangeWindowAttributes(display, win, CWOverrideRedirect | CWCursor, &attributes); |
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160 | |
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161 | if (window_title != NULL) |
162 | g_xstuff.pXStoreName(display, win, window_title); |
163 | evt_mask = ExposureMask | FocusChangeMask | PropertyChangeMask; |
164 | if (xenv_flags && (*xenv_flags & XENV_CAP_KEYS)) |
165 | evt_mask |= KeyPressMask | KeyReleaseMask; |
166 | if (xenv_flags && (*xenv_flags & XENV_CAP_MOUSE)) |
167 | evt_mask |= ButtonPressMask | ButtonReleaseMask | PointerMotionMask; |
168 | g_xstuff.pXSelectInput(display, win, evt_mask); |
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169 | g_xstuff.pXMapWindow(display, win); |
170 | g_xstuff.pXGrabKeyboard(display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime); |
171 | g_xstuff.pXkbSetDetectableAutoRepeat(display, 1, NULL); |
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172 | // XSetIOErrorHandler |
173 | |
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174 | // we don't know when event dispatch will be called, so sync now |
175 | g_xstuff.pXSync(display, False); |
176 | |
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177 | return 0; |
178 | fail2: |
179 | dlclose(x11lib); |
180 | fail: |
181 | g_xstuff.display = NULL; |
182 | fprintf(stderr, "x11 handling disabled.\n"); |
183 | return -1; |
184 | } |
185 | |
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186 | static void x11h_update(int (*key_cb)(void *cb_arg, int kc, int is_pressed), |
187 | int (*mouseb_cb)(void *cb_arg, int x, int y, int button, int is_pressed), |
188 | int (*mousem_cb)(void *cb_arg, int x, int y), |
189 | void *cb_arg) |
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190 | { |
191 | XEvent evt; |
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192 | int keysym; |
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193 | |
194 | while (g_xstuff.pXPending(g_xstuff.display)) |
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195 | { |
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196 | g_xstuff.pXNextEvent(g_xstuff.display, &evt); |
197 | switch (evt.type) |
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198 | { |
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199 | case Expose: |
200 | while (g_xstuff.pXCheckTypedEvent(g_xstuff.display, Expose, &evt)) |
201 | ; |
202 | break; |
203 | |
204 | case KeyPress: |
205 | keysym = g_xstuff.pXLookupKeysym(&evt.xkey, 0); |
206 | if (key_cb != NULL) |
207 | key_cb(cb_arg, keysym, 1); |
208 | break; |
209 | |
210 | case KeyRelease: |
211 | keysym = g_xstuff.pXLookupKeysym(&evt.xkey, 0); |
212 | if (key_cb != NULL) |
213 | key_cb(cb_arg, keysym, 0); |
214 | break; |
215 | |
216 | case ButtonPress: |
217 | if (mouseb_cb != NULL) |
218 | mouseb_cb(cb_arg, evt.xbutton.x, evt.xbutton.y, |
219 | evt.xbutton.button, 1); |
220 | break; |
221 | |
222 | case ButtonRelease: |
223 | if (mouseb_cb != NULL) |
224 | mouseb_cb(cb_arg, evt.xbutton.x, evt.xbutton.y, |
225 | evt.xbutton.button, 0); |
226 | break; |
227 | |
228 | case MotionNotify: |
229 | if (mousem_cb != NULL) |
230 | mousem_cb(cb_arg, evt.xmotion.x, evt.xmotion.y); |
231 | break; |
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232 | } |
233 | } |
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234 | } |
235 | |
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236 | static void x11h_wait_vmstate(void) |
237 | { |
238 | Atom wm_state = g_xstuff.pXInternAtom(g_xstuff.display, "WM_STATE", False); |
239 | XEvent evt; |
240 | int i; |
241 | |
242 | usleep(20000); |
243 | |
244 | for (i = 0; i < 20; i++) { |
245 | while (g_xstuff.pXPending(g_xstuff.display)) { |
246 | g_xstuff.pXNextEvent(g_xstuff.display, &evt); |
247 | // printf("w event %d\n", evt.type); |
248 | if (evt.type == PropertyNotify && evt.xproperty.atom == wm_state) |
249 | return; |
250 | } |
251 | usleep(200000); |
252 | } |
253 | |
254 | fprintf(stderr, PFX "timeout waiting for wm_state change\n"); |
255 | } |
256 | |
257 | static int x11h_minimize(void) |
258 | { |
259 | XSetWindowAttributes attributes; |
260 | Display *display = g_xstuff.display; |
261 | Window window = g_xstuff.window; |
262 | int screen = DefaultScreen(g_xstuff.display); |
263 | int display_width, display_height; |
264 | XWMHints wm_hints; |
265 | XEvent evt; |
266 | |
267 | g_xstuff.pXWithdrawWindow(display, window, screen); |
268 | |
269 | attributes.override_redirect = False; |
270 | g_xstuff.pXChangeWindowAttributes(display, window, |
271 | CWOverrideRedirect, &attributes); |
272 | |
273 | wm_hints.flags = StateHint; |
274 | wm_hints.initial_state = IconicState; |
275 | g_xstuff.pXSetWMHints(display, window, &wm_hints); |
276 | |
277 | g_xstuff.pXMapWindow(display, window); |
278 | |
279 | while (g_xstuff.pXNextEvent(display, &evt) == 0) |
280 | { |
281 | // printf("m event %d\n", evt.type); |
282 | switch (evt.type) |
283 | { |
284 | case FocusIn: |
285 | goto out; |
286 | default: |
287 | break; |
288 | } |
289 | } |
290 | |
291 | out: |
292 | g_xstuff.pXWithdrawWindow(display, window, screen); |
293 | |
294 | // must wait for some magic vmstate property change before setting override_redirect |
295 | x11h_wait_vmstate(); |
296 | |
297 | attributes.override_redirect = True; |
298 | g_xstuff.pXChangeWindowAttributes(display, window, |
299 | CWOverrideRedirect, &attributes); |
300 | |
301 | // fixup window after resize on override_redirect loss |
302 | display_width = DisplayWidth(display, screen); |
303 | display_height = DisplayHeight(display, screen); |
304 | g_xstuff.pXMoveResizeWindow(display, window, 0, 0, display_width, display_height); |
305 | |
306 | g_xstuff.pXMapWindow(display, window); |
307 | g_xstuff.pXGrabKeyboard(display, window, False, GrabModeAsync, GrabModeAsync, CurrentTime); |
308 | g_xstuff.pXkbSetDetectableAutoRepeat(display, 1, NULL); |
309 | |
310 | // we don't know when event dispatch will be called, so sync now |
311 | g_xstuff.pXSync(display, False); |
312 | |
313 | return 0; |
314 | } |
315 | |
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316 | static struct termios g_kbd_termios_saved; |
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317 | static int g_kbdfd = -1; |
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318 | |
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319 | static int tty_init(void) |
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320 | { |
321 | struct termios kbd_termios; |
322 | int mode; |
323 | |
324 | g_kbdfd = open("/dev/tty", O_RDWR); |
325 | if (g_kbdfd == -1) { |
326 | perror(PFX "open /dev/tty"); |
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327 | return -1; |
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328 | } |
329 | |
330 | if (ioctl(g_kbdfd, KDGETMODE, &mode) == -1) { |
331 | perror(PFX "(not hiding FB): KDGETMODE"); |
332 | goto fail; |
333 | } |
334 | |
335 | if (tcgetattr(g_kbdfd, &kbd_termios) == -1) { |
336 | perror(PFX "tcgetattr"); |
337 | goto fail; |
338 | } |
339 | |
340 | g_kbd_termios_saved = kbd_termios; |
341 | kbd_termios.c_lflag &= ~(ICANON | ECHO); // | ISIG); |
342 | kbd_termios.c_iflag &= ~(ISTRIP | IGNCR | ICRNL | INLCR | IXOFF | IXON); |
343 | kbd_termios.c_cc[VMIN] = 0; |
344 | kbd_termios.c_cc[VTIME] = 0; |
345 | |
346 | if (tcsetattr(g_kbdfd, TCSAFLUSH, &kbd_termios) == -1) { |
347 | perror(PFX "tcsetattr"); |
348 | goto fail; |
349 | } |
350 | |
351 | if (ioctl(g_kbdfd, KDSETMODE, KD_GRAPHICS) == -1) { |
352 | perror(PFX "KDSETMODE KD_GRAPHICS"); |
353 | tcsetattr(g_kbdfd, TCSAFLUSH, &g_kbd_termios_saved); |
354 | goto fail; |
355 | } |
356 | |
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357 | return 0; |
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358 | |
359 | fail: |
360 | close(g_kbdfd); |
361 | g_kbdfd = -1; |
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362 | return -1; |
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363 | } |
364 | |
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365 | static void tty_end(void) |
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366 | { |
367 | if (g_kbdfd < 0) |
368 | return; |
369 | |
370 | if (ioctl(g_kbdfd, KDSETMODE, KD_TEXT) == -1) |
371 | perror(PFX "KDSETMODE KD_TEXT"); |
372 | |
373 | if (tcsetattr(g_kbdfd, TCSAFLUSH, &g_kbd_termios_saved) == -1) |
374 | perror(PFX "tcsetattr"); |
375 | |
376 | close(g_kbdfd); |
377 | g_kbdfd = -1; |
378 | } |
379 | |
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380 | int xenv_init(int *xenv_flags, const char *window_title) |
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381 | { |
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382 | int ret; |
383 | |
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384 | ret = x11h_init(xenv_flags, window_title); |
385 | if (ret == 0) |
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386 | goto out; |
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387 | |
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388 | if (xenv_flags != NULL) |
389 | *xenv_flags &= ~(XENV_CAP_KEYS | XENV_CAP_MOUSE); /* TODO? */ |
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390 | ret = tty_init(); |
391 | if (ret == 0) |
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392 | goto out; |
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393 | |
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394 | fprintf(stderr, PFX "error: both x11h_init and tty_init failed\n"); |
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395 | ret = -1; |
396 | out: |
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397 | return ret; |
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398 | } |
399 | |
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400 | int xenv_update(int (*key_cb)(void *cb_arg, int kc, int is_pressed), |
401 | int (*mouseb_cb)(void *cb_arg, int x, int y, int button, int is_pressed), |
402 | int (*mousem_cb)(void *cb_arg, int x, int y), |
403 | void *cb_arg) |
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404 | { |
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405 | if (g_xstuff.display) { |
406 | x11h_update(key_cb, mouseb_cb, mousem_cb, cb_arg); |
407 | return 0; |
408 | } |
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409 | |
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410 | // TODO: read tty? |
411 | return -1; |
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412 | } |
413 | |
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414 | /* blocking minimize until user maximizes again */ |
415 | int xenv_minimize(void) |
416 | { |
417 | int ret; |
418 | |
419 | if (g_xstuff.display) { |
420 | xenv_update(NULL, NULL, NULL, NULL); |
421 | ret = x11h_minimize(); |
422 | xenv_update(NULL, NULL, NULL, NULL); |
423 | return ret; |
424 | } |
425 | |
426 | return -1; |
427 | } |
428 | |
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429 | int xenv_keycode_to_keysym(int kc, int shift) |
430 | { |
431 | if (g_xstuff.display) |
432 | return g_xstuff.pXkbKeycodeToKeysym(g_xstuff.display, |
433 | kc, 0, shift); |
434 | |
435 | return -1; |
436 | } |
437 | |
f9b3f440 |
438 | void xenv_finish(void) |
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439 | { |
f9b3f440 |
440 | // TODO: cleanup X? |
441 | tty_end(); |
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442 | } |
090bcb85 |
443 | |
444 | #if 0 |
445 | int main() |
446 | { |
447 | int i, r, d; |
448 | |
449 | xenv_init("just a test"); |
450 | |
451 | for (i = 0; i < 5; i++) { |
452 | while ((r = xenv_update(&d)) > 0) |
453 | printf("%d %x %d\n", d, r, r); |
454 | sleep(1); |
455 | |
456 | if (i == 1) |
457 | xenv_minimize(); |
458 | printf("ll %d\n", i); |
459 | } |
460 | |
461 | printf("xenv_finish..\n"); |
462 | xenv_finish(); |
463 | |
464 | return 0; |
465 | } |
466 | #endif |