My dmenu build
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  1. /* See LICENSE file for copyright and license details. */
  2. #include <ctype.h>
  3. #include <locale.h>
  4. #include <stdarg.h>
  5. #include <stdlib.h>
  6. #include <stdio.h>
  7. #include <string.h>
  8. #include <unistd.h>
  9. #include <X11/Xlib.h>
  10. #include <X11/Xutil.h>
  11. #include <X11/keysym.h>
  12. /* macros */
  13. #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
  14. /* enums */
  15. enum { ColFG, ColBG, ColLast };
  16. /* typedefs */
  17. typedef struct {
  18. int x, y, w, h;
  19. unsigned long norm[ColLast];
  20. unsigned long sel[ColLast];
  21. Drawable drawable;
  22. GC gc;
  23. struct {
  24. XFontStruct *xfont;
  25. XFontSet set;
  26. int ascent;
  27. int descent;
  28. int height;
  29. } font;
  30. } DC; /* draw context */
  31. typedef struct Item Item;
  32. struct Item {
  33. Item *next; /* traverses all items */
  34. Item *left, *right; /* traverses items matching current search pattern */
  35. char *text;
  36. };
  37. /* forward declarations */
  38. void calcoffsets(void);
  39. void cleanup(void);
  40. void drawmenu(void);
  41. void drawtext(const char *text, unsigned long col[ColLast]);
  42. void *emalloc(unsigned int size);
  43. void eprint(const char *errstr, ...);
  44. char *estrdup(const char *str);
  45. unsigned long getcolor(const char *colstr);
  46. Bool grabkeyboard(void);
  47. void initfont(const char *fontstr);
  48. void kpress(XKeyEvent * e);
  49. void match(char *pattern);
  50. void readstdin(void);
  51. void run(void);
  52. void setup(Bool bottom);
  53. int strido(const char *text, const char *pattern);
  54. unsigned int textnw(const char *text, unsigned int len);
  55. unsigned int textw(const char *text);
  56. #include "config.h"
  57. /* variables */
  58. char *font = FONT;
  59. char *maxname = NULL;
  60. char *normbg = NORMBGCOLOR;
  61. char *normfg = NORMFGCOLOR;
  62. char *prompt = NULL;
  63. char *selbg = SELBGCOLOR;
  64. char *selfg = SELFGCOLOR;
  65. char text[4096];
  66. int screen;
  67. int ret = 0;
  68. unsigned int cmdw = 0;
  69. unsigned int mw, mh;
  70. unsigned int promptw = 0;
  71. unsigned int nitem = 0;
  72. unsigned int numlockmask = 0;
  73. Bool running = True;
  74. Display *dpy;
  75. DC dc = {0};
  76. Item *allitems = NULL; /* first of all items */
  77. Item *item = NULL; /* first of pattern matching items */
  78. Item *sel = NULL;
  79. Item *next = NULL;
  80. Item *prev = NULL;
  81. Item *curr = NULL;
  82. Window root, win;
  83. void
  84. calcoffsets(void) {
  85. unsigned int tw, w;
  86. if(!curr)
  87. return;
  88. w = promptw + cmdw + 2 * SPACE;
  89. for(next = curr; next; next=next->right) {
  90. tw = textw(next->text);
  91. if(tw > mw / 3)
  92. tw = mw / 3;
  93. w += tw;
  94. if(w > mw)
  95. break;
  96. }
  97. w = promptw + cmdw + 2 * SPACE;
  98. for(prev = curr; prev && prev->left; prev=prev->left) {
  99. tw = textw(prev->left->text);
  100. if(tw > mw / 3)
  101. tw = mw / 3;
  102. w += tw;
  103. if(w > mw)
  104. break;
  105. }
  106. }
  107. void
  108. cleanup(void) {
  109. Item *itm;
  110. while(allitems) {
  111. itm = allitems->next;
  112. free(allitems->text);
  113. free(allitems);
  114. allitems = itm;
  115. }
  116. if(dc.font.set)
  117. XFreeFontSet(dpy, dc.font.set);
  118. else
  119. XFreeFont(dpy, dc.font.xfont);
  120. XFreePixmap(dpy, dc.drawable);
  121. XFreeGC(dpy, dc.gc);
  122. XDestroyWindow(dpy, win);
  123. XUngrabKeyboard(dpy, CurrentTime);
  124. }
  125. void
  126. drawmenu(void) {
  127. Item *i;
  128. dc.x = 0;
  129. dc.y = 0;
  130. dc.w = mw;
  131. dc.h = mh;
  132. drawtext(NULL, dc.norm);
  133. /* print prompt? */
  134. if(promptw) {
  135. dc.w = promptw;
  136. drawtext(prompt, dc.sel);
  137. }
  138. dc.x += promptw;
  139. dc.w = mw - promptw;
  140. /* print command */
  141. if(cmdw && item)
  142. dc.w = cmdw;
  143. drawtext(text[0] ? text : NULL, dc.norm);
  144. dc.x += cmdw;
  145. if(curr) {
  146. dc.w = SPACE;
  147. drawtext((curr && curr->left) ? "<" : NULL, dc.norm);
  148. dc.x += dc.w;
  149. /* determine maximum items */
  150. for(i = curr; i != next; i=i->right) {
  151. dc.w = textw(i->text);
  152. if(dc.w > mw / 3)
  153. dc.w = mw / 3;
  154. drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
  155. dc.x += dc.w;
  156. }
  157. dc.x = mw - SPACE;
  158. dc.w = SPACE;
  159. drawtext(next ? ">" : NULL, dc.norm);
  160. }
  161. XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
  162. XFlush(dpy);
  163. }
  164. void
  165. drawtext(const char *text, unsigned long col[ColLast]) {
  166. int x, y, w, h;
  167. static char buf[256];
  168. unsigned int len, olen;
  169. XRectangle r = { dc.x, dc.y, dc.w, dc.h };
  170. XSetForeground(dpy, dc.gc, col[ColBG]);
  171. XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  172. if(!text)
  173. return;
  174. w = 0;
  175. olen = len = strlen(text);
  176. if(len >= sizeof buf)
  177. len = sizeof buf - 1;
  178. memcpy(buf, text, len);
  179. buf[len] = 0;
  180. h = dc.font.ascent + dc.font.descent;
  181. y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
  182. x = dc.x + (h / 2);
  183. /* shorten text if necessary */
  184. while(len && (w = textnw(buf, len)) > dc.w - h)
  185. buf[--len] = 0;
  186. if(len < olen) {
  187. if(len > 1)
  188. buf[len - 1] = '.';
  189. if(len > 2)
  190. buf[len - 2] = '.';
  191. if(len > 3)
  192. buf[len - 3] = '.';
  193. }
  194. if(w > dc.w)
  195. return; /* too long */
  196. XSetForeground(dpy, dc.gc, col[ColFG]);
  197. if(dc.font.set)
  198. XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
  199. else
  200. XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
  201. }
  202. void *
  203. emalloc(unsigned int size) {
  204. void *res = malloc(size);
  205. if(!res)
  206. eprint("fatal: could not malloc() %u bytes\n", size);
  207. return res;
  208. }
  209. void
  210. eprint(const char *errstr, ...) {
  211. va_list ap;
  212. va_start(ap, errstr);
  213. vfprintf(stderr, errstr, ap);
  214. va_end(ap);
  215. exit(EXIT_FAILURE);
  216. }
  217. char *
  218. estrdup(const char *str) {
  219. void *res = strdup(str);
  220. if(!res)
  221. eprint("fatal: could not malloc() %u bytes\n", strlen(str));
  222. return res;
  223. }
  224. unsigned long
  225. getcolor(const char *colstr) {
  226. Colormap cmap = DefaultColormap(dpy, screen);
  227. XColor color;
  228. if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
  229. eprint("error, cannot allocate color '%s'\n", colstr);
  230. return color.pixel;
  231. }
  232. Bool
  233. grabkeyboard(void) {
  234. unsigned int len;
  235. for(len = 1000; len; len--) {
  236. if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
  237. == GrabSuccess)
  238. break;
  239. usleep(1000);
  240. }
  241. return len > 0;
  242. }
  243. void
  244. initfont(const char *fontstr) {
  245. char *def, **missing;
  246. int i, n;
  247. if(!fontstr || fontstr[0] == '\0')
  248. eprint("error, cannot load font: '%s'\n", fontstr);
  249. missing = NULL;
  250. if(dc.font.set)
  251. XFreeFontSet(dpy, dc.font.set);
  252. dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
  253. if(missing)
  254. XFreeStringList(missing);
  255. if(dc.font.set) {
  256. XFontSetExtents *font_extents;
  257. XFontStruct **xfonts;
  258. char **font_names;
  259. dc.font.ascent = dc.font.descent = 0;
  260. font_extents = XExtentsOfFontSet(dc.font.set);
  261. n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
  262. for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
  263. if(dc.font.ascent < (*xfonts)->ascent)
  264. dc.font.ascent = (*xfonts)->ascent;
  265. if(dc.font.descent < (*xfonts)->descent)
  266. dc.font.descent = (*xfonts)->descent;
  267. xfonts++;
  268. }
  269. }
  270. else {
  271. if(dc.font.xfont)
  272. XFreeFont(dpy, dc.font.xfont);
  273. dc.font.xfont = NULL;
  274. if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))) {
  275. if(!(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
  276. eprint("error, cannot load font: '%s'\n", fontstr);
  277. }
  278. dc.font.ascent = dc.font.xfont->ascent;
  279. dc.font.descent = dc.font.xfont->descent;
  280. }
  281. dc.font.height = dc.font.ascent + dc.font.descent;
  282. }
  283. void
  284. kpress(XKeyEvent * e) {
  285. char buf[32];
  286. int i, num;
  287. unsigned int len;
  288. KeySym ksym;
  289. len = strlen(text);
  290. buf[0] = 0;
  291. num = XLookupString(e, buf, sizeof buf, &ksym, 0);
  292. if(IsKeypadKey(ksym)) {
  293. if(ksym == XK_KP_Enter) {
  294. ksym = XK_Return;
  295. } else if(ksym >= XK_KP_0 && ksym <= XK_KP_9) {
  296. ksym = (ksym - XK_KP_0) + XK_0;
  297. }
  298. }
  299. if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
  300. || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
  301. || IsPrivateKeypadKey(ksym))
  302. return;
  303. /* first check if a control mask is omitted */
  304. if(e->state & ControlMask) {
  305. switch (ksym) {
  306. default: /* ignore other control sequences */
  307. return;
  308. case XK_bracketleft:
  309. ksym = XK_Escape;
  310. break;
  311. case XK_h:
  312. case XK_H:
  313. ksym = XK_BackSpace;
  314. break;
  315. case XK_i:
  316. case XK_I:
  317. ksym = XK_Tab;
  318. break;
  319. case XK_j:
  320. case XK_J:
  321. ksym = XK_Return;
  322. break;
  323. case XK_u:
  324. case XK_U:
  325. text[0] = 0;
  326. match(text);
  327. drawmenu();
  328. return;
  329. case XK_w:
  330. case XK_W:
  331. if(len) {
  332. i = len - 1;
  333. while(i >= 0 && text[i] == ' ')
  334. text[i--] = 0;
  335. while(i >= 0 && text[i] != ' ')
  336. text[i--] = 0;
  337. match(text);
  338. drawmenu();
  339. }
  340. return;
  341. }
  342. }
  343. if(CLEANMASK(e->state) & Mod1Mask) {
  344. switch(ksym) {
  345. default: return;
  346. case XK_h:
  347. ksym = XK_Left;
  348. break;
  349. case XK_l:
  350. ksym = XK_Right;
  351. break;
  352. case XK_j:
  353. ksym = XK_Next;
  354. break;
  355. case XK_k:
  356. ksym = XK_Prior;
  357. break;
  358. case XK_g:
  359. ksym = XK_Home;
  360. break;
  361. case XK_G:
  362. ksym = XK_End;
  363. break;
  364. }
  365. }
  366. switch(ksym) {
  367. default:
  368. if(num && !iscntrl((int) buf[0])) {
  369. buf[num] = 0;
  370. if(len > 0)
  371. strncat(text, buf, sizeof text);
  372. else
  373. strncpy(text, buf, sizeof text);
  374. match(text);
  375. }
  376. break;
  377. case XK_BackSpace:
  378. if(len) {
  379. text[--len] = 0;
  380. match(text);
  381. }
  382. break;
  383. case XK_End:
  384. if(!item)
  385. return;
  386. while(next) {
  387. sel = curr = next;
  388. calcoffsets();
  389. }
  390. while(sel && sel->right)
  391. sel = sel->right;
  392. break;
  393. case XK_Escape:
  394. ret = 1;
  395. running = False;
  396. break;
  397. case XK_Home:
  398. if(!item)
  399. return;
  400. sel = curr = item;
  401. calcoffsets();
  402. break;
  403. case XK_Left:
  404. if(!(sel && sel->left))
  405. return;
  406. sel=sel->left;
  407. if(sel->right == curr) {
  408. curr = prev;
  409. calcoffsets();
  410. }
  411. break;
  412. case XK_Next:
  413. if(!next)
  414. return;
  415. sel = curr = next;
  416. calcoffsets();
  417. break;
  418. case XK_Prior:
  419. if(!prev)
  420. return;
  421. sel = curr = prev;
  422. calcoffsets();
  423. break;
  424. case XK_Return:
  425. if((e->state & ShiftMask) && text)
  426. fprintf(stdout, "%s", text);
  427. else if(sel)
  428. fprintf(stdout, "%s", sel->text);
  429. else if(text)
  430. fprintf(stdout, "%s", text);
  431. fflush(stdout);
  432. running = False;
  433. break;
  434. case XK_Right:
  435. if(!(sel && sel->right))
  436. return;
  437. sel=sel->right;
  438. if(sel == next) {
  439. curr = next;
  440. calcoffsets();
  441. }
  442. break;
  443. case XK_Tab:
  444. if(!sel)
  445. return;
  446. strncpy(text, sel->text, sizeof text);
  447. match(text);
  448. break;
  449. }
  450. drawmenu();
  451. }
  452. void
  453. match(char *pattern) {
  454. unsigned int plen;
  455. Item *i, *j;
  456. if(!pattern)
  457. return;
  458. plen = strlen(pattern);
  459. item = j = NULL;
  460. nitem = 0;
  461. for(i = allitems; i; i=i->next)
  462. if(!plen || !strncmp(pattern, i->text, plen)) {
  463. if(!j)
  464. item = i;
  465. else
  466. j->right = i;
  467. i->left = j;
  468. i->right = NULL;
  469. j = i;
  470. nitem++;
  471. }
  472. for(i = allitems; i; i=i->next)
  473. if(plen && strncmp(pattern, i->text, plen)
  474. && strstr(i->text, pattern)) {
  475. if(!j)
  476. item = i;
  477. else
  478. j->right = i;
  479. i->left = j;
  480. i->right = NULL;
  481. j = i;
  482. nitem++;
  483. }
  484. for(i = allitems; i; i=i->next)
  485. if(plen && strncmp(pattern, i->text, plen)
  486. && !strstr(i->text, pattern)
  487. && strido(i->text,pattern)) {
  488. if(!j)
  489. item = i;
  490. else
  491. j->right = i;
  492. i->left = j;
  493. i->right = NULL;
  494. j = i;
  495. nitem++;
  496. }
  497. curr = prev = next = sel = item;
  498. calcoffsets();
  499. }
  500. void
  501. readstdin(void) {
  502. char *p, buf[1024];
  503. unsigned int len = 0, max = 0;
  504. Item *i, *new;
  505. i = 0;
  506. while(fgets(buf, sizeof buf, stdin)) {
  507. len = strlen(buf);
  508. if (buf[len - 1] == '\n')
  509. buf[len - 1] = 0;
  510. p = estrdup(buf);
  511. if(max < len) {
  512. maxname = p;
  513. max = len;
  514. }
  515. new = emalloc(sizeof(Item));
  516. new->next = new->left = new->right = NULL;
  517. new->text = p;
  518. if(!i)
  519. allitems = new;
  520. else
  521. i->next = new;
  522. i = new;
  523. }
  524. }
  525. void
  526. run(void) {
  527. XEvent ev;
  528. /* main event loop */
  529. while(running && !XNextEvent(dpy, &ev))
  530. switch (ev.type) {
  531. default: /* ignore all crap */
  532. break;
  533. case KeyPress:
  534. kpress(&ev.xkey);
  535. break;
  536. case Expose:
  537. if(ev.xexpose.count == 0)
  538. drawmenu();
  539. break;
  540. }
  541. }
  542. void
  543. setup(Bool bottom) {
  544. unsigned int i, j;
  545. XModifierKeymap *modmap;
  546. XSetWindowAttributes wa;
  547. /* init modifier map */
  548. modmap = XGetModifierMapping(dpy);
  549. for(i = 0; i < 8; i++)
  550. for(j = 0; j < modmap->max_keypermod; j++) {
  551. if(modmap->modifiermap[i * modmap->max_keypermod + j]
  552. == XKeysymToKeycode(dpy, XK_Num_Lock))
  553. numlockmask = (1 << i);
  554. }
  555. XFreeModifiermap(modmap);
  556. /* style */
  557. dc.norm[ColBG] = getcolor(normbg);
  558. dc.norm[ColFG] = getcolor(normfg);
  559. dc.sel[ColBG] = getcolor(selbg);
  560. dc.sel[ColFG] = getcolor(selfg);
  561. initfont(font);
  562. /* menu window */
  563. wa.override_redirect = 1;
  564. wa.background_pixmap = ParentRelative;
  565. wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask;
  566. mw = DisplayWidth(dpy, screen);
  567. mh = dc.font.height + 2;
  568. win = XCreateWindow(dpy, root, 0,
  569. bottom ? DisplayHeight(dpy, screen) - mh : 0, mw, mh, 0,
  570. DefaultDepth(dpy, screen), CopyFromParent,
  571. DefaultVisual(dpy, screen),
  572. CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
  573. /* pixmap */
  574. dc.drawable = XCreatePixmap(dpy, root, mw, mh, DefaultDepth(dpy, screen));
  575. dc.gc = XCreateGC(dpy, root, 0, 0);
  576. XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
  577. if(!dc.font.set)
  578. XSetFont(dpy, dc.gc, dc.font.xfont->fid);
  579. if(maxname)
  580. cmdw = textw(maxname);
  581. if(cmdw > mw / 3)
  582. cmdw = mw / 3;
  583. if(prompt)
  584. promptw = textw(prompt);
  585. if(promptw > mw / 5)
  586. promptw = mw / 5;
  587. text[0] = 0;
  588. match(text);
  589. XMapRaised(dpy, win);
  590. }
  591. int
  592. strido(const char *text, const char *pattern) {
  593. for(; *text && *pattern; text++)
  594. if (*text == *pattern)
  595. pattern++;
  596. return !*pattern;
  597. }
  598. unsigned int
  599. textnw(const char *text, unsigned int len) {
  600. XRectangle r;
  601. if(dc.font.set) {
  602. XmbTextExtents(dc.font.set, text, len, NULL, &r);
  603. return r.width;
  604. }
  605. return XTextWidth(dc.font.xfont, text, len);
  606. }
  607. unsigned int
  608. textw(const char *text) {
  609. return textnw(text, strlen(text)) + dc.font.height;
  610. }
  611. int
  612. main(int argc, char *argv[]) {
  613. Bool bottom = False;
  614. unsigned int i;
  615. /* command line args */
  616. for(i = 1; i < argc; i++)
  617. if(!strcmp(argv[i], "-b")) {
  618. bottom = True;
  619. }
  620. else if(!strcmp(argv[i], "-fn")) {
  621. if(++i < argc) font = argv[i];
  622. }
  623. else if(!strcmp(argv[i], "-nb")) {
  624. if(++i < argc) normbg = argv[i];
  625. }
  626. else if(!strcmp(argv[i], "-nf")) {
  627. if(++i < argc) normfg = argv[i];
  628. }
  629. else if(!strcmp(argv[i], "-p")) {
  630. if(++i < argc) prompt = argv[i];
  631. }
  632. else if(!strcmp(argv[i], "-sb")) {
  633. if(++i < argc) selbg = argv[i];
  634. }
  635. else if(!strcmp(argv[i], "-sf")) {
  636. if(++i < argc) selfg = argv[i];
  637. }
  638. else if(!strcmp(argv[i], "-v"))
  639. eprint("dmenu-"VERSION", © 2006-2007 Anselm R. Garbe, Sander van Dijk\n");
  640. else
  641. eprint("usage: dmenu [-b] [-fn <font>] [-nb <color>] [-nf <color>]\n"
  642. " [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
  643. setlocale(LC_CTYPE, "");
  644. dpy = XOpenDisplay(0);
  645. if(!dpy)
  646. eprint("dmenu: cannot open display\n");
  647. screen = DefaultScreen(dpy);
  648. root = RootWindow(dpy, screen);
  649. if(isatty(STDIN_FILENO)) {
  650. readstdin();
  651. running = grabkeyboard();
  652. }
  653. else { /* prevent keypress loss */
  654. running = grabkeyboard();
  655. readstdin();
  656. }
  657. setup(bottom);
  658. drawmenu();
  659. XSync(dpy, False);
  660. run();
  661. cleanup();
  662. XCloseDisplay(dpy);
  663. return ret;
  664. }