| 1 | #include <err.h> |
| 2 | #include <stdio.h> |
| 3 | #include <stdlib.h> |
| 4 | #include <string.h> |
| 5 | #include <unistd.h> |
| 6 | #include <X11/Xlib.h> |
| 7 | #include <X11/Xutil.h> |
| 8 | |
| 9 | /* macros */ |
| 10 | #define LEN(x) (sizeof (x) / sizeof (x[0])) |
| 11 | |
| 12 | /* color enum */ |
| 13 | enum {ColorFG, ColorBG, ColorLast}; |
| 14 | |
| 15 | /* draw context structure */ |
| 16 | struct DC { |
| 17 | unsigned long unpressed[ColorLast]; |
| 18 | unsigned long pressed[ColorLast]; |
| 19 | unsigned long decoration[ColorLast]; |
| 20 | |
| 21 | Drawable d; |
| 22 | GC gc; |
| 23 | XFontStruct *font; |
| 24 | int fonth; |
| 25 | }; |
| 26 | |
| 27 | /* menu geometry structure */ |
| 28 | struct Geometry { |
| 29 | int itemb; /* item border */ |
| 30 | int itemw; /* item width */ |
| 31 | int itemh; /* item height */ |
| 32 | int border; /* window border width */ |
| 33 | int separator; /* menu separator width */ |
| 34 | }; |
| 35 | |
| 36 | /* screen geometry structure */ |
| 37 | struct ScreenGeometry { |
| 38 | int cursx, cursy; /* cursor position */ |
| 39 | int screenw, screenh; /* screen width and height */ |
| 40 | }; |
| 41 | |
| 42 | /* menu item structure */ |
| 43 | struct Item { |
| 44 | char *label; |
| 45 | char *output; |
| 46 | int y; |
| 47 | int h; |
| 48 | struct Item *next; |
| 49 | struct Menu *submenu; |
| 50 | }; |
| 51 | |
| 52 | /* menu structure */ |
| 53 | struct Menu { |
| 54 | struct Menu *parent; |
| 55 | struct Item *list; |
| 56 | struct Item *selected; |
| 57 | int x, y, w, h; |
| 58 | unsigned level; |
| 59 | Window win; |
| 60 | }; |
| 61 | |
| 62 | /* function declarations */ |
| 63 | static unsigned long getcolor(const char *s); |
| 64 | static void setupdc(void); |
| 65 | static void setupgeom(void); |
| 66 | static void setupgrab(void); |
| 67 | static struct Item *allocitem(const char *label, const char *output); |
| 68 | static struct Menu *allocmenu(struct Menu *parent, struct Item *list, unsigned level); |
| 69 | static void getmenuitem(Window win, int y, |
| 70 | struct Menu **menu_ret, struct Item **item_ret); |
| 71 | static void drawmenu(void); |
| 72 | static void calcscreengeom(void); |
| 73 | static void calcmenu(struct Menu *menu); |
| 74 | static void setcurrmenu(struct Menu *currmenu_new); |
| 75 | static void parsestdin(void); |
| 76 | static void run(void); |
| 77 | static void cleanupexit(void); |
| 78 | static void usage(void); |
| 79 | |
| 80 | /* X variables */ |
| 81 | static Colormap colormap; |
| 82 | static Display *dpy; |
| 83 | static Window rootwin; |
| 84 | static int screen; |
| 85 | static struct DC dc; |
| 86 | |
| 87 | /* menu variables */ |
| 88 | static struct Menu *rootmenu = NULL; |
| 89 | static struct Menu *currmenu = NULL; |
| 90 | |
| 91 | /* geometry variables */ |
| 92 | static struct Geometry geom; |
| 93 | static struct ScreenGeometry screengeom; |
| 94 | |
| 95 | /* flag variables */ |
| 96 | static Bool override_redirect = True; |
| 97 | |
| 98 | #include "config.h" |
| 99 | |
| 100 | int |
| 101 | main(int argc, char *argv[]) |
| 102 | { |
| 103 | int ch; |
| 104 | |
| 105 | while ((ch = getopt(argc, argv, "w")) != -1) { |
| 106 | switch (ch) { |
| 107 | case 'w': |
| 108 | override_redirect = False; |
| 109 | break; |
| 110 | default: |
| 111 | usage(); |
| 112 | break; |
| 113 | } |
| 114 | } |
| 115 | argc -= optind; |
| 116 | argv += optind; |
| 117 | |
| 118 | /* open connection to server and set X variables */ |
| 119 | if ((dpy = XOpenDisplay(NULL)) == NULL) |
| 120 | errx(1, "cannot open display"); |
| 121 | screen = DefaultScreen(dpy); |
| 122 | rootwin = RootWindow(dpy, screen); |
| 123 | colormap = DefaultColormap(dpy, screen); |
| 124 | |
| 125 | /* setup */ |
| 126 | setupdc(); |
| 127 | setupgeom(); |
| 128 | setupgrab(); |
| 129 | |
| 130 | /* generate menus and recalculate them */ |
| 131 | parsestdin(); |
| 132 | if (rootmenu == NULL) |
| 133 | errx(1, "no menu generated"); |
| 134 | calcscreengeom(); |
| 135 | calcmenu(rootmenu); |
| 136 | |
| 137 | /* run event loop */ |
| 138 | run(); |
| 139 | |
| 140 | return 1; /* UNREACHABLE */ |
| 141 | } |
| 142 | |
| 143 | /* get color from color string */ |
| 144 | static unsigned long |
| 145 | getcolor(const char *s) |
| 146 | { |
| 147 | XColor color; |
| 148 | |
| 149 | if(!XAllocNamedColor(dpy, colormap, s, &color, &color)) |
| 150 | errx(1, "cannot allocate color: %s", s); |
| 151 | return color.pixel; |
| 152 | } |
| 153 | |
| 154 | /* init draw context */ |
| 155 | static void |
| 156 | setupdc(void) |
| 157 | { |
| 158 | /* get color pixels */ |
| 159 | dc.unpressed[ColorBG] = getcolor(UNPRESSEDBG); |
| 160 | dc.unpressed[ColorFG] = getcolor(UNPRESSEDFG); |
| 161 | dc.pressed[ColorBG] = getcolor(PRESSEDBG); |
| 162 | dc.pressed[ColorFG] = getcolor(PRESSEDFG); |
| 163 | dc.decoration[ColorBG] = getcolor(DECORATIONBG); |
| 164 | dc.decoration[ColorFG] = getcolor(DECORATIONFG); |
| 165 | |
| 166 | /* try to get font */ |
| 167 | if ((dc.font = XLoadQueryFont(dpy, FONT)) == NULL) |
| 168 | errx(1, "cannot load font"); |
| 169 | dc.fonth = dc.font->ascent + dc.font->descent; |
| 170 | |
| 171 | /* create GC and set its font */ |
| 172 | dc.gc = XCreateGC(dpy, rootwin, 0, NULL); |
| 173 | XSetFont(dpy, dc.gc, dc.font->fid); |
| 174 | } |
| 175 | |
| 176 | /* init menu geometry values */ |
| 177 | static void |
| 178 | setupgeom(void) |
| 179 | { |
| 180 | geom.itemb = ITEMB; |
| 181 | geom.itemh = dc.fonth + ITEMB * 2; |
| 182 | geom.itemw = ITEMW; |
| 183 | geom.border = BORDER; |
| 184 | geom.separator = SEPARATOR; |
| 185 | } |
| 186 | |
| 187 | /* grab pointer */ |
| 188 | static void |
| 189 | setupgrab(void) |
| 190 | { |
| 191 | XGrabPointer(dpy, rootwin, True, ButtonPressMask | ButtonReleaseMask, |
| 192 | GrabModeAsync, GrabModeAsync, None, None, CurrentTime); |
| 193 | } |
| 194 | |
| 195 | /* allocate an item */ |
| 196 | static struct Item * |
| 197 | allocitem(const char *label, const char *output) |
| 198 | { |
| 199 | struct Item *item; |
| 200 | |
| 201 | if ((item = malloc(sizeof *item)) == NULL) |
| 202 | err(1, "malloc"); |
| 203 | if (*label == '\0') { |
| 204 | item->label = NULL; |
| 205 | item->output = NULL; |
| 206 | } else { |
| 207 | if ((item->label = strdup(label)) == NULL) |
| 208 | err(1, "strdup"); |
| 209 | if ((item->output = strdup(output)) == NULL) |
| 210 | err(1, "strdup"); |
| 211 | } |
| 212 | item->y = 0; |
| 213 | item->h = item->label ? geom.itemh : geom.separator; |
| 214 | item->next = NULL; |
| 215 | item->submenu = NULL; |
| 216 | |
| 217 | return item; |
| 218 | } |
| 219 | |
| 220 | /* allocate a menu */ |
| 221 | static struct Menu * |
| 222 | allocmenu(struct Menu *parent, struct Item *list, unsigned level) |
| 223 | { |
| 224 | XSetWindowAttributes swa; |
| 225 | struct Menu *menu; |
| 226 | |
| 227 | if ((menu = malloc(sizeof *menu)) == NULL) |
| 228 | err(1, "malloc"); |
| 229 | menu->parent = parent; |
| 230 | menu->list = list; |
| 231 | menu->selected = NULL; |
| 232 | menu->w = geom.itemw; |
| 233 | menu->h = 0; /* calculated by calcmenu() */ |
| 234 | menu->x = 0; /* calculated by calcmenu() */ |
| 235 | menu->y = 0; /* calculated by calcmenu() */ |
| 236 | menu->level = level; |
| 237 | |
| 238 | swa.override_redirect = override_redirect; |
| 239 | swa.background_pixel = dc.decoration[ColorBG]; |
| 240 | swa.border_pixel = dc.decoration[ColorFG]; |
| 241 | swa.event_mask = ExposureMask | KeyPressMask | ButtonPressMask | ButtonReleaseMask |
| 242 | | PointerMotionMask; |
| 243 | menu->win = XCreateWindow(dpy, rootwin, 0, 0, geom.itemw, geom.itemh, geom.border, |
| 244 | CopyFromParent, CopyFromParent, CopyFromParent, |
| 245 | CWOverrideRedirect | CWBackPixel | CWBorderPixel | CWEventMask, |
| 246 | &swa); |
| 247 | |
| 248 | return menu; |
| 249 | } |
| 250 | |
| 251 | /* create menus and items from the stdin */ |
| 252 | static void |
| 253 | parsestdin(void) |
| 254 | { |
| 255 | char *s, buf[BUFSIZ]; |
| 256 | char *label, *output; |
| 257 | unsigned level = 0; |
| 258 | unsigned i; |
| 259 | struct Item *curritem = NULL; /* item currently being read */ |
| 260 | struct Menu *prevmenu = NULL; /* menu the previous item was added to */ |
| 261 | struct Item *item; /* dummy item for for loops */ |
| 262 | struct Menu *menu; /* dummy menu for for loops */ |
| 263 | size_t count = 0; /* number of items in the current menu */ |
| 264 | |
| 265 | while (fgets(buf, BUFSIZ, stdin) != NULL) { |
| 266 | level = 0; |
| 267 | s = buf; |
| 268 | |
| 269 | while (*s == '\t') { |
| 270 | level++; |
| 271 | s++; |
| 272 | } |
| 273 | |
| 274 | label = output = s; |
| 275 | |
| 276 | while (*s != '\0' && *s != '\t' && *s != '\n') |
| 277 | s++; |
| 278 | |
| 279 | while (*s == '\t') |
| 280 | *s++ = '\0'; |
| 281 | |
| 282 | if (*s != '\0' && *s != '\n') |
| 283 | output = s; |
| 284 | |
| 285 | while (*s != '\0' && *s != '\n') |
| 286 | s++; |
| 287 | |
| 288 | if (*s == '\n') |
| 289 | *s = '\0'; |
| 290 | |
| 291 | curritem = allocitem(label, output); |
| 292 | |
| 293 | if (prevmenu == NULL) { /* there is no menu yet */ |
| 294 | menu = allocmenu(NULL, curritem, level); |
| 295 | rootmenu = menu; |
| 296 | prevmenu = menu; |
| 297 | count = 1; |
| 298 | } else if (level < prevmenu->level) { /* item is continuation of a parent menu*/ |
| 299 | for (menu = prevmenu, i = level; |
| 300 | menu != NULL && i < prevmenu->level; |
| 301 | menu = menu->parent, i++) |
| 302 | ; |
| 303 | |
| 304 | if (menu == NULL) |
| 305 | errx(1, "reached NULL menu"); |
| 306 | |
| 307 | for (item = menu->list; item->next != NULL; item = item->next) |
| 308 | ; |
| 309 | |
| 310 | item->next = curritem; |
| 311 | prevmenu = menu; |
| 312 | } else if (level == prevmenu->level) { /* item is a continuation of current menu */ |
| 313 | for (item = prevmenu->list; item->next != NULL; item = item->next) |
| 314 | ; |
| 315 | item->next = curritem; |
| 316 | } else if (level > prevmenu->level) { /* item begins a new menu */ |
| 317 | menu = allocmenu(prevmenu, curritem, level); |
| 318 | |
| 319 | for (item = prevmenu->list; item->next != NULL; item = item->next) |
| 320 | ; |
| 321 | |
| 322 | item->submenu = menu; |
| 323 | |
| 324 | prevmenu = menu; |
| 325 | } |
| 326 | count++; |
| 327 | } |
| 328 | } |
| 329 | |
| 330 | /* calculate screen geometry */ |
| 331 | static void |
| 332 | calcscreengeom(void) |
| 333 | { |
| 334 | Window w1, w2; /* unused variables */ |
| 335 | int a, b; /* unused variables */ |
| 336 | unsigned mask; /* unused variable */ |
| 337 | |
| 338 | XQueryPointer(dpy, rootwin, &w1, &w2, &screengeom.cursx, &screengeom.cursy, &a, &b, &mask); |
| 339 | screengeom.screenw = DisplayWidth(dpy, screen); |
| 340 | screengeom.screenh = DisplayHeight(dpy, screen); |
| 341 | } |
| 342 | |
| 343 | /* recursivelly calculate height and position of the menus */ |
| 344 | static void |
| 345 | calcmenu(struct Menu *menu) |
| 346 | { |
| 347 | XWindowChanges changes; |
| 348 | XSizeHints sizeh; |
| 349 | struct Item *item; |
| 350 | |
| 351 | /* calculate items positions and menu height */ |
| 352 | for (item = menu->list; item != NULL; item = item->next) { |
| 353 | item->y = menu->h; |
| 354 | if (item->label == NULL) /* height for separator item */ |
| 355 | menu->h += geom.separator; |
| 356 | else |
| 357 | menu->h += geom.itemh; |
| 358 | } |
| 359 | |
| 360 | /* calculate menu's x and y positions */ |
| 361 | if (menu->parent == NULL) { /* if root menu, calculate in respect to cursor */ |
| 362 | if (screengeom.screenw - screengeom.cursx >= menu->w) |
| 363 | menu->x = screengeom.cursx; |
| 364 | else if (screengeom.cursx > menu->w) |
| 365 | menu->x = screengeom.cursx - menu->w; |
| 366 | |
| 367 | if (screengeom.screenh - screengeom.cursy >= menu->h) |
| 368 | menu->y = screengeom.cursy; |
| 369 | else if (screengeom.screenh > menu->h) |
| 370 | menu->y = screengeom.screenh - menu->h; |
| 371 | } else { /* else, calculate in respect to parent menu */ |
| 372 | |
| 373 | /* search for the item in parent menu that generates this menu */ |
| 374 | for (item = menu->parent->list; item->submenu != menu; item = item->next) |
| 375 | ; |
| 376 | |
| 377 | if (screengeom.screenw - (menu->parent->x + menu->parent->w) >= menu->w) |
| 378 | menu->x = menu->parent->x + menu->parent->w; |
| 379 | else if (menu->parent->x > menu->w) |
| 380 | menu->x = menu->parent->x - menu->w; |
| 381 | |
| 382 | if (screengeom.screenh - (item->y + menu->parent->y) > menu->h) |
| 383 | menu->y = item->y + menu->parent->y; |
| 384 | else if (screengeom.screenh - menu->parent->y > menu->h) |
| 385 | menu->y = menu->parent->y; |
| 386 | else if (screengeom.screenh > menu->h) |
| 387 | menu->y = screengeom.screenh - menu->h; |
| 388 | } |
| 389 | |
| 390 | /* update menu geometry */ |
| 391 | changes.height = menu->h; |
| 392 | changes.x = menu->x; |
| 393 | changes.y = menu->y; |
| 394 | XConfigureWindow(dpy, menu->win, CWHeight | CWX | CWY, &changes); |
| 395 | |
| 396 | /* set window manager size hints */ |
| 397 | sizeh.flags = PMaxSize | PMinSize; |
| 398 | sizeh.min_width = sizeh.max_width = menu->w; |
| 399 | sizeh.min_height = sizeh.max_height = menu->h; |
| 400 | XSetWMNormalHints(dpy, menu->win, &sizeh); |
| 401 | |
| 402 | /* calculate positions of submenus */ |
| 403 | for (item = menu->list; item != NULL; item = item->next) { |
| 404 | if (item->submenu != NULL) |
| 405 | calcmenu(item->submenu); |
| 406 | } |
| 407 | } |
| 408 | |
| 409 | /* get menu and item of given window and position */ |
| 410 | static void |
| 411 | getmenuitem(Window win, int y, |
| 412 | struct Menu **menu_ret, struct Item **item_ret) |
| 413 | { |
| 414 | struct Menu *menu = NULL; |
| 415 | struct Item *item = NULL; |
| 416 | |
| 417 | for (menu = currmenu; menu != NULL; menu = menu->parent) { |
| 418 | if (menu->win == win) { |
| 419 | for (item = menu->list; item != NULL; item = item->next) { |
| 420 | if (y >= item->y && y <= item->y + item->h) { |
| 421 | goto done; |
| 422 | } |
| 423 | } |
| 424 | } |
| 425 | } |
| 426 | |
| 427 | |
| 428 | done: |
| 429 | *menu_ret = menu; |
| 430 | *item_ret = item; |
| 431 | } |
| 432 | |
| 433 | /* set currentmenu to menu, umap previous menus and map current menu and its parents */ |
| 434 | static void |
| 435 | setcurrmenu(struct Menu *currmenu_new) |
| 436 | { |
| 437 | struct Menu *menu; |
| 438 | |
| 439 | if (currmenu_new == currmenu) |
| 440 | return; |
| 441 | |
| 442 | for (menu = currmenu; menu != NULL; menu = menu->parent) { |
| 443 | XUnmapWindow(dpy, menu->win); |
| 444 | } |
| 445 | |
| 446 | currmenu = currmenu_new; |
| 447 | |
| 448 | for (menu = currmenu; menu != NULL; menu = menu->parent) |
| 449 | XMapWindow(dpy, menu->win); |
| 450 | } |
| 451 | |
| 452 | /* draw items of the current menu and of its ancestors */ |
| 453 | static void |
| 454 | drawmenu(void) |
| 455 | { |
| 456 | struct Menu *menu; |
| 457 | struct Item *item; |
| 458 | |
| 459 | for (menu = currmenu; menu != NULL; menu = menu->parent) { |
| 460 | for (item = menu->list; item != NULL; item = item->next) { |
| 461 | unsigned long *color; |
| 462 | size_t labellen; |
| 463 | int labelx, labely; |
| 464 | |
| 465 | /* determine item color */ |
| 466 | if (item->label == NULL) |
| 467 | color = dc.decoration; |
| 468 | else if (item == menu->selected) |
| 469 | color = dc.pressed; |
| 470 | else |
| 471 | color = dc.unpressed; |
| 472 | |
| 473 | /* draw item box */ |
| 474 | XSetForeground(dpy, dc.gc, color[ColorBG]); |
| 475 | XFillRectangle(dpy, menu->win, dc.gc, 0, item->y, |
| 476 | geom.itemw, item->h); |
| 477 | |
| 478 | /* continue if item is a separator */ |
| 479 | if (item->label == NULL) |
| 480 | continue; |
| 481 | |
| 482 | /* draw item label */ |
| 483 | labellen = strlen(item->label); |
| 484 | labelx = 0 + dc.fonth; |
| 485 | labely = item->y + dc.fonth + geom.itemb; |
| 486 | XSetForeground(dpy, dc.gc, color[ColorFG]); |
| 487 | XDrawString(dpy, menu->win, dc.gc, labelx, labely, item->label, labellen); |
| 488 | |
| 489 | /* draw triangle, if item contains a submenu */ |
| 490 | if (item->submenu != NULL) { |
| 491 | int trianglex = geom.itemw - (geom.itemb + dc.fonth); |
| 492 | int triangley = item->y + geom.itemb; |
| 493 | |
| 494 | XPoint triangle[] = { |
| 495 | {trianglex, triangley}, |
| 496 | {trianglex + dc.fonth, triangley + dc.fonth/2}, |
| 497 | {trianglex, triangley + dc.fonth}, |
| 498 | {trianglex, triangley} |
| 499 | }; |
| 500 | |
| 501 | XFillPolygon(dpy, menu->win, dc.gc, triangle, LEN(triangle), |
| 502 | Convex, CoordModeOrigin); |
| 503 | } |
| 504 | } |
| 505 | } |
| 506 | } |
| 507 | |
| 508 | /* run event loop */ |
| 509 | static void |
| 510 | run(void) |
| 511 | { |
| 512 | struct Menu *menu; |
| 513 | struct Item *item; |
| 514 | struct Item *previtem = NULL; |
| 515 | XEvent ev; |
| 516 | |
| 517 | setcurrmenu(rootmenu); |
| 518 | |
| 519 | while (!XNextEvent(dpy, &ev)) { |
| 520 | switch(ev.type) { |
| 521 | case Expose: |
| 522 | drawmenu(); |
| 523 | break; |
| 524 | case MotionNotify: |
| 525 | getmenuitem(ev.xbutton.window, ev.xbutton.y, &menu, &item); |
| 526 | if (menu != NULL && item != NULL) { |
| 527 | if (previtem != item) { |
| 528 | if (item->submenu != NULL) |
| 529 | setcurrmenu(item->submenu); |
| 530 | else |
| 531 | setcurrmenu(menu); |
| 532 | previtem = item; |
| 533 | } else if (menu->selected != item) |
| 534 | menu->selected = item; |
| 535 | } |
| 536 | drawmenu(); |
| 537 | break; |
| 538 | case ButtonRelease: |
| 539 | getmenuitem(ev.xbutton.window, ev.xbutton.y, &menu, &item); |
| 540 | if (menu != NULL && item != NULL) { |
| 541 | if (item->label == NULL) |
| 542 | break; /* ignore separators */ |
| 543 | if (item->submenu != NULL) { |
| 544 | setcurrmenu(item->submenu); |
| 545 | } else { |
| 546 | printf("%s\n", item->output); |
| 547 | cleanupexit(); |
| 548 | } |
| 549 | drawmenu(); |
| 550 | } else { |
| 551 | cleanupexit(); |
| 552 | } |
| 553 | break; |
| 554 | } |
| 555 | } |
| 556 | } |
| 557 | |
| 558 | /* cleanup and exit */ |
| 559 | static void |
| 560 | cleanupexit(void) |
| 561 | { |
| 562 | XCloseDisplay(dpy); |
| 563 | exit(0); |
| 564 | } |
| 565 | |
| 566 | /* show usage */ |
| 567 | static void |
| 568 | usage(void) |
| 569 | { |
| 570 | (void)fprintf(stderr, "usage: xmenu [-w] menuname\n"); |
| 571 | exit(1); |
| 572 | } |