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[dmenu.git] / dmenu.c
1 /* See LICENSE file for copyright and license details. */
2 #include <ctype.h>
3 #include <stdio.h>
4 #include <stdlib.h>
5 #include <string.h>
6 #include <strings.h>
7 #include <unistd.h>
8 #include <X11/Xlib.h>
9 #include <X11/Xatom.h>
10 #include <X11/Xutil.h>
11 #ifdef XINERAMA
12 #include <X11/extensions/Xinerama.h>
13 #endif
14 #include "draw.h"
15
16 #define INTERSECT(x,y,w,h,r) (MAX(0, MIN((x)+(w),(r).x_org+(r).width) - MAX((x),(r).x_org)) \
17 * MAX(0, MIN((y)+(h),(r).y_org+(r).height) - MAX((y),(r).y_org)))
18 #define MIN(a,b) ((a) < (b) ? (a) : (b))
19 #define MAX(a,b) ((a) > (b) ? (a) : (b))
20
21 typedef struct Item Item;
22 struct Item {
23 char *text;
24 Item *left, *right;
25 };
26
27 static void appenditem(Item *item, Item **list, Item **last);
28 static void calcoffsets(void);
29 static char *cistrstr(const char *s, const char *sub);
30 static void drawmenu(void);
31 static void grabkeyboard(void);
32 static void insert(const char *str, ssize_t n);
33 static void keypress(XKeyEvent *ev);
34 static void match(void);
35 static size_t nextrune(int inc);
36 static void paste(void);
37 static void readstdin(void);
38 static void run(void);
39 static void setup(void);
40 static void usage(void);
41
42 static char text[BUFSIZ] = "";
43 static int bh, mw, mh;
44 static int inputw, promptw;
45 static size_t cursor = 0;
46 static const char *font = NULL;
47 static const char *prompt = NULL;
48 static const char *normbgcolor = "#222222";
49 static const char *normfgcolor = "#bbbbbb";
50 static const char *selbgcolor = "#005577";
51 static const char *selfgcolor = "#eeeeee";
52 static unsigned int lines = 0;
53 static unsigned long normcol[ColLast];
54 static unsigned long selcol[ColLast];
55 static Atom clip, utf8;
56 static Bool topbar = True;
57 static DC *dc;
58 static Item *items = NULL;
59 static Item *matches, *matchend;
60 static Item *prev, *curr, *next, *sel;
61 static Window win;
62 static XIC xic;
63
64 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
65 static char *(*fstrstr)(const char *, const char *) = strstr;
66
67 int
68 main(int argc, char *argv[]) {
69 Bool fast = False;
70 int i;
71
72 for(i = 1; i < argc; i++)
73 /* these options take no arguments */
74 if(!strcmp(argv[i], "-v")) { /* prints version information */
75 puts("dmenu-"VERSION", © 2006-2012 dmenu engineers, see LICENSE for details");
76 exit(EXIT_SUCCESS);
77 }
78 else if(!strcmp(argv[i], "-b")) /* appears at the bottom of the screen */
79 topbar = False;
80 else if(!strcmp(argv[i], "-f")) /* grabs keyboard before reading stdin */
81 fast = True;
82 else if(!strcmp(argv[i], "-i")) { /* case-insensitive item matching */
83 fstrncmp = strncasecmp;
84 fstrstr = cistrstr;
85 }
86 else if(i+1 == argc)
87 usage();
88 /* these options take one argument */
89 else if(!strcmp(argv[i], "-l")) /* number of lines in vertical list */
90 lines = atoi(argv[++i]);
91 else if(!strcmp(argv[i], "-p")) /* adds prompt to left of input field */
92 prompt = argv[++i];
93 else if(!strcmp(argv[i], "-fn")) /* font or font set */
94 font = argv[++i];
95 else if(!strcmp(argv[i], "-nb")) /* normal background color */
96 normbgcolor = argv[++i];
97 else if(!strcmp(argv[i], "-nf")) /* normal foreground color */
98 normfgcolor = argv[++i];
99 else if(!strcmp(argv[i], "-sb")) /* selected background color */
100 selbgcolor = argv[++i];
101 else if(!strcmp(argv[i], "-sf")) /* selected foreground color */
102 selfgcolor = argv[++i];
103 else
104 usage();
105
106 dc = initdc();
107 initfont(dc, font);
108
109 if(fast) {
110 grabkeyboard();
111 readstdin();
112 }
113 else {
114 readstdin();
115 grabkeyboard();
116 }
117 setup();
118 run();
119
120 return 1; /* unreachable */
121 }
122
123 void
124 appenditem(Item *item, Item **list, Item **last) {
125 if(*last)
126 (*last)->right = item;
127 else
128 *list = item;
129
130 item->left = *last;
131 item->right = NULL;
132 *last = item;
133 }
134
135 void
136 calcoffsets(void) {
137 int i, n;
138
139 if(lines > 0)
140 n = lines * bh;
141 else
142 n = mw - (promptw + inputw + textw(dc, "<") + textw(dc, ">"));
143 /* calculate which items will begin the next page and previous page */
144 for(i = 0, next = curr; next; next = next->right)
145 if((i += (lines > 0) ? bh : MIN(textw(dc, next->text), n)) > n)
146 break;
147 for(i = 0, prev = curr; prev && prev->left; prev = prev->left)
148 if((i += (lines > 0) ? bh : MIN(textw(dc, prev->left->text), n)) > n)
149 break;
150 }
151
152 char *
153 cistrstr(const char *s, const char *sub) {
154 size_t len;
155
156 for(len = strlen(sub); *s; s++)
157 if(!strncasecmp(s, sub, len))
158 return (char *)s;
159 return NULL;
160 }
161
162 void
163 drawmenu(void) {
164 int curpos;
165 Item *item;
166
167 dc->x = 0;
168 dc->y = 0;
169 dc->h = bh;
170 drawrect(dc, 0, 0, mw, mh, True, BG(dc, normcol));
171
172 if(prompt) {
173 dc->w = promptw;
174 drawtext(dc, prompt, selcol);
175 dc->x = dc->w;
176 }
177 /* draw input field */
178 dc->w = (lines > 0 || !matches) ? mw - dc->x : inputw;
179 drawtext(dc, text, normcol);
180 if((curpos = textnw(dc, text, cursor) + dc->h/2 - 2) < dc->w)
181 drawrect(dc, curpos, 2, 1, dc->h - 4, True, FG(dc, normcol));
182
183 if(lines > 0) {
184 /* draw vertical list */
185 dc->w = mw - dc->x;
186 for(item = curr; item != next; item = item->right) {
187 dc->y += dc->h;
188 drawtext(dc, item->text, (item == sel) ? selcol : normcol);
189 }
190 }
191 else if(matches) {
192 /* draw horizontal list */
193 dc->x += inputw;
194 dc->w = textw(dc, "<");
195 if(curr->left)
196 drawtext(dc, "<", normcol);
197 for(item = curr; item != next; item = item->right) {
198 dc->x += dc->w;
199 dc->w = MIN(textw(dc, item->text), mw - dc->x - textw(dc, ">"));
200 drawtext(dc, item->text, (item == sel) ? selcol : normcol);
201 }
202 dc->w = textw(dc, ">");
203 dc->x = mw - dc->w;
204 if(next)
205 drawtext(dc, ">", normcol);
206 }
207 mapdc(dc, win, mw, mh);
208 }
209
210 void
211 grabkeyboard(void) {
212 int i;
213
214 /* try to grab keyboard, we may have to wait for another process to ungrab */
215 for(i = 0; i < 1000; i++) {
216 if(XGrabKeyboard(dc->dpy, DefaultRootWindow(dc->dpy), True,
217 GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess)
218 return;
219 usleep(1000);
220 }
221 eprintf("cannot grab keyboard\n");
222 }
223
224 void
225 insert(const char *str, ssize_t n) {
226 if(strlen(text) + n > sizeof text - 1)
227 return;
228 /* move existing text out of the way, insert new text, and update cursor */
229 memmove(&text[cursor + n], &text[cursor], sizeof text - cursor - MAX(n, 0));
230 if(n > 0)
231 memcpy(&text[cursor], str, n);
232 cursor += n;
233 match();
234 }
235
236 void
237 keypress(XKeyEvent *ev) {
238 char buf[32];
239 int len;
240 KeySym ksym = NoSymbol;
241 Status status;
242
243 len = XmbLookupString(xic, ev, buf, sizeof buf, &ksym, &status);
244 if(status == XBufferOverflow)
245 return;
246 if(ev->state & ControlMask)
247 switch(ksym) {
248 case XK_a: ksym = XK_Home; break;
249 case XK_b: ksym = XK_Left; break;
250 case XK_c: ksym = XK_Escape; break;
251 case XK_d: ksym = XK_Delete; break;
252 case XK_e: ksym = XK_End; break;
253 case XK_f: ksym = XK_Right; break;
254 case XK_g: ksym = XK_Escape; break;
255 case XK_h: ksym = XK_BackSpace; break;
256 case XK_i: ksym = XK_Tab; break;
257 case XK_j: ksym = XK_Return; break;
258 case XK_m: ksym = XK_Return; break;
259 case XK_n: ksym = XK_Down; break;
260 case XK_p: ksym = XK_Up; break;
261
262 case XK_k: /* delete right */
263 text[cursor] = '\0';
264 match();
265 break;
266 case XK_u: /* delete left */
267 insert(NULL, 0 - cursor);
268 break;
269 case XK_w: /* delete word */
270 while(cursor > 0 && text[nextrune(-1)] == ' ')
271 insert(NULL, nextrune(-1) - cursor);
272 while(cursor > 0 && text[nextrune(-1)] != ' ')
273 insert(NULL, nextrune(-1) - cursor);
274 break;
275 case XK_y: /* paste selection */
276 XConvertSelection(dc->dpy, (ev->state & ShiftMask) ? clip : XA_PRIMARY,
277 utf8, utf8, win, CurrentTime);
278 return;
279 default:
280 return;
281 }
282 else if(ev->state & Mod1Mask)
283 switch(ksym) {
284 case XK_g: ksym = XK_Home; break;
285 case XK_G: ksym = XK_End; break;
286 case XK_h: ksym = XK_Up; break;
287 case XK_j: ksym = XK_Next; break;
288 case XK_k: ksym = XK_Prior; break;
289 case XK_l: ksym = XK_Down; break;
290 default:
291 return;
292 }
293 switch(ksym) {
294 default:
295 if(!iscntrl(*buf))
296 insert(buf, len);
297 break;
298 case XK_Delete:
299 if(text[cursor] == '\0')
300 return;
301 cursor = nextrune(+1);
302 /* fallthrough */
303 case XK_BackSpace:
304 if(cursor == 0)
305 return;
306 insert(NULL, nextrune(-1) - cursor);
307 break;
308 case XK_End:
309 if(text[cursor] != '\0') {
310 cursor = strlen(text);
311 break;
312 }
313 if(next) {
314 /* jump to end of list and position items in reverse */
315 curr = matchend;
316 calcoffsets();
317 curr = prev;
318 calcoffsets();
319 while(next && (curr = curr->right))
320 calcoffsets();
321 }
322 sel = matchend;
323 break;
324 case XK_Escape:
325 exit(EXIT_FAILURE);
326 case XK_Home:
327 if(sel == matches) {
328 cursor = 0;
329 break;
330 }
331 sel = curr = matches;
332 calcoffsets();
333 break;
334 case XK_Left:
335 if(cursor > 0 && (!sel || !sel->left || lines > 0)) {
336 cursor = nextrune(-1);
337 break;
338 }
339 if(lines > 0)
340 return;
341 /* fallthrough */
342 case XK_Up:
343 if(sel && sel->left && (sel = sel->left)->right == curr) {
344 curr = prev;
345 calcoffsets();
346 }
347 break;
348 case XK_Next:
349 if(!next)
350 return;
351 sel = curr = next;
352 calcoffsets();
353 break;
354 case XK_Prior:
355 if(!prev)
356 return;
357 sel = curr = prev;
358 calcoffsets();
359 break;
360 case XK_Return:
361 case XK_KP_Enter:
362 puts((sel && !(ev->state & ShiftMask)) ? sel->text : text);
363 exit(EXIT_SUCCESS);
364 case XK_Right:
365 if(text[cursor] != '\0') {
366 cursor = nextrune(+1);
367 break;
368 }
369 if(lines > 0)
370 return;
371 /* fallthrough */
372 case XK_Down:
373 if(sel && sel->right && (sel = sel->right) == next) {
374 curr = next;
375 calcoffsets();
376 }
377 break;
378 case XK_Tab:
379 if(!sel)
380 return;
381 strncpy(text, sel->text, sizeof text);
382 cursor = strlen(text);
383 match();
384 break;
385 }
386 drawmenu();
387 }
388
389 void
390 match(void) {
391 static char **tokv = NULL;
392 static int tokn = 0;
393
394 char buf[sizeof text], *s;
395 int i, tokc = 0;
396 size_t len;
397 Item *item, *lprefix, *lsubstr, *prefixend, *substrend;
398
399 strcpy(buf, text);
400 /* separate input text into tokens to be matched individually */
401 for(s = strtok(buf, " "); s; tokv[tokc-1] = s, s = strtok(NULL, " "))
402 if(++tokc > tokn && !(tokv = realloc(tokv, ++tokn * sizeof *tokv)))
403 eprintf("cannot realloc %u bytes\n", tokn * sizeof *tokv);
404 len = tokc ? strlen(tokv[0]) : 0;
405
406 matches = lprefix = lsubstr = matchend = prefixend = substrend = NULL;
407 for(item = items; item && item->text; item++) {
408 for(i = 0; i < tokc; i++)
409 if(!fstrstr(item->text, tokv[i]))
410 break;
411 if(i != tokc) /* not all tokens match */
412 continue;
413 /* exact matches go first, then prefixes, then substrings */
414 if(!tokc || !fstrncmp(tokv[0], item->text, len+1))
415 appenditem(item, &matches, &matchend);
416 else if(!fstrncmp(tokv[0], item->text, len))
417 appenditem(item, &lprefix, &prefixend);
418 else
419 appenditem(item, &lsubstr, &substrend);
420 }
421 if(lprefix) {
422 if(matches) {
423 matchend->right = lprefix;
424 lprefix->left = matchend;
425 }
426 else
427 matches = lprefix;
428 matchend = prefixend;
429 }
430 if(lsubstr) {
431 if(matches) {
432 matchend->right = lsubstr;
433 lsubstr->left = matchend;
434 }
435 else
436 matches = lsubstr;
437 matchend = substrend;
438 }
439 curr = sel = matches;
440 calcoffsets();
441 }
442
443 size_t
444 nextrune(int inc) {
445 ssize_t n;
446
447 /* return location of next utf8 rune in the given direction (+1 or -1) */
448 for(n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc);
449 return n;
450 }
451
452 void
453 paste(void) {
454 char *p, *q;
455 int di;
456 unsigned long dl;
457 Atom da;
458
459 /* we have been given the current selection, now insert it into input */
460 XGetWindowProperty(dc->dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
461 utf8, &da, &di, &dl, &dl, (unsigned char **)&p);
462 insert(p, (q = strchr(p, '\n')) ? q-p : (ssize_t)strlen(p));
463 XFree(p);
464 drawmenu();
465 }
466
467 void
468 readstdin(void) {
469 char buf[sizeof text], *p, *maxstr = NULL;
470 size_t i, max = 0, size = 0;
471
472 /* read each line from stdin and add it to the item list */
473 for(i = 0; fgets(buf, sizeof buf, stdin); i++) {
474 if(i+1 >= size / sizeof *items)
475 if(!(items = realloc(items, (size += BUFSIZ))))
476 eprintf("cannot realloc %u bytes:", size);
477 if((p = strchr(buf, '\n')))
478 *p = '\0';
479 if(!(items[i].text = strdup(buf)))
480 eprintf("cannot strdup %u bytes:", strlen(buf)+1);
481 if(strlen(items[i].text) > max)
482 max = strlen(maxstr = items[i].text);
483 }
484 if(items)
485 items[i].text = NULL;
486 inputw = maxstr ? textw(dc, maxstr) : 0;
487 lines = MIN(lines, i);
488 }
489
490 void
491 run(void) {
492 XEvent ev;
493
494 while(!XNextEvent(dc->dpy, &ev)) {
495 if(XFilterEvent(&ev, win))
496 continue;
497 switch(ev.type) {
498 case Expose:
499 if(ev.xexpose.count == 0)
500 mapdc(dc, win, mw, mh);
501 break;
502 case KeyPress:
503 keypress(&ev.xkey);
504 break;
505 case SelectionNotify:
506 if(ev.xselection.property == utf8)
507 paste();
508 break;
509 case VisibilityNotify:
510 if(ev.xvisibility.state != VisibilityUnobscured)
511 XRaiseWindow(dc->dpy, win);
512 break;
513 }
514 }
515 }
516
517 void
518 setup(void) {
519 int x, y, screen = DefaultScreen(dc->dpy);
520 Window root = RootWindow(dc->dpy, screen);
521 XSetWindowAttributes swa;
522 XIM xim;
523 #ifdef XINERAMA
524 int n;
525 XineramaScreenInfo *info;
526 #endif
527
528 normcol[ColBG] = getcolor(dc, normbgcolor);
529 normcol[ColFG] = getcolor(dc, normfgcolor);
530 selcol[ColBG] = getcolor(dc, selbgcolor);
531 selcol[ColFG] = getcolor(dc, selfgcolor);
532
533 clip = XInternAtom(dc->dpy, "CLIPBOARD", False);
534 utf8 = XInternAtom(dc->dpy, "UTF8_STRING", False);
535
536 /* calculate menu geometry */
537 bh = dc->font.height + 2;
538 lines = MAX(lines, 0);
539 mh = (lines + 1) * bh;
540 #ifdef XINERAMA
541 if((info = XineramaQueryScreens(dc->dpy, &n))) {
542 int a, j, di, i = 0, area = 0;
543 unsigned int du;
544 Window w, pw, dw, *dws;
545 XWindowAttributes wa;
546
547 XGetInputFocus(dc->dpy, &w, &di);
548 if(w != root && w != PointerRoot && w != None) {
549 /* find top-level window containing current input focus */
550 do {
551 if(XQueryTree(dc->dpy, (pw = w), &dw, &w, &dws, &du) && dws)
552 XFree(dws);
553 } while(w != root && w != pw);
554 /* find xinerama screen with which the window intersects most */
555 if(XGetWindowAttributes(dc->dpy, pw, &wa))
556 for(j = 0; j < n; j++)
557 if((a = INTERSECT(wa.x, wa.y, wa.width, wa.height, info[j])) > area) {
558 area = a;
559 i = j;
560 }
561 }
562 /* no focused window is on screen, so use pointer location instead */
563 if(!area && XQueryPointer(dc->dpy, root, &dw, &dw, &x, &y, &di, &di, &du))
564 for(i = 0; i < n; i++)
565 if(INTERSECT(x, y, 1, 1, info[i]))
566 break;
567
568 x = info[i].x_org;
569 y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
570 mw = info[i].width;
571 XFree(info);
572 }
573 else
574 #endif
575 {
576 x = 0;
577 y = topbar ? 0 : DisplayHeight(dc->dpy, screen) - mh;
578 mw = DisplayWidth(dc->dpy, screen);
579 }
580 promptw = prompt ? textw(dc, prompt) : 0;
581 inputw = MIN(inputw, mw/3);
582 match();
583
584 /* create menu window */
585 swa.override_redirect = True;
586 swa.background_pixel = normcol[ColBG];
587 swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
588 win = XCreateWindow(dc->dpy, root, x, y, mw, mh, 0,
589 DefaultDepth(dc->dpy, screen), CopyFromParent,
590 DefaultVisual(dc->dpy, screen),
591 CWOverrideRedirect | CWBackPixel | CWEventMask, &swa);
592
593 /* open input methods */
594 xim = XOpenIM(dc->dpy, NULL, NULL, NULL);
595 xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
596 XNClientWindow, win, XNFocusWindow, win, NULL);
597
598 XMapRaised(dc->dpy, win);
599 resizedc(dc, mw, mh);
600 drawmenu();
601 }
602
603 void
604 usage(void) {
605 fputs("usage: dmenu [-b] [-f] [-i] [-l lines] [-p prompt] [-fn font]\n"
606 " [-nb color] [-nf color] [-sb color] [-sf color] [-v]\n", stderr);
607 exit(EXIT_FAILURE);
608 }