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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 Bool out;
26 };
27
28 static void appenditem(Item *item, Item **list, Item **last);
29 static void calcoffsets(void);
30 static char *cistrstr(const char *s, const char *sub);
31 static void drawmenu(void);
32 static void grabkeyboard(void);
33 static void insert(const char *str, ssize_t n);
34 static void keypress(XKeyEvent *ev);
35 static void match(void);
36 static size_t nextrune(int inc);
37 static void paste(void);
38 static void readstdin(void);
39 static void run(void);
40 static void setup(void);
41 static void usage(void);
42
43 static char text[BUFSIZ] = "";
44 static int bh, mw, mh;
45 static int inputw, promptw;
46 static size_t cursor = 0;
47 static unsigned long normcol[ColLast];
48 static unsigned long selcol[ColLast];
49 static unsigned long outcol[ColLast];
50 static Atom clip, utf8;
51 static DC *dc;
52 static Item *items = NULL;
53 static Item *matches, *matchend;
54 static Item *prev, *curr, *next, *sel;
55 static Window win;
56 static XIC xic;
57 static int mon = -1;
58
59 #include "config.h"
60
61 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
62 static char *(*fstrstr)(const char *, const char *) = strstr;
63
64 int
65 main(int argc, char *argv[]) {
66 Bool fast = False;
67 int i;
68
69 for(i = 1; i < argc; i++)
70 /* these options take no arguments */
71 if(!strcmp(argv[i], "-v")) { /* prints version information */
72 puts("dmenu-"VERSION", © 2006-2014 dmenu engineers, see LICENSE for details");
73 exit(EXIT_SUCCESS);
74 }
75 else if(!strcmp(argv[i], "-b")) /* appears at the bottom of the screen */
76 topbar = False;
77 else if(!strcmp(argv[i], "-f")) /* grabs keyboard before reading stdin */
78 fast = True;
79 else if(!strcmp(argv[i], "-i")) { /* case-insensitive item matching */
80 fstrncmp = strncasecmp;
81 fstrstr = cistrstr;
82 }
83 else if(i+1 == argc)
84 usage();
85 /* these options take one argument */
86 else if(!strcmp(argv[i], "-l")) /* number of lines in vertical list */
87 lines = atoi(argv[++i]);
88 else if(!strcmp(argv[i], "-m"))
89 mon = atoi(argv[++i]);
90 else if(!strcmp(argv[i], "-p")) /* adds prompt to left of input field */
91 prompt = argv[++i];
92 else if(!strcmp(argv[i], "-fn")) /* font or font set */
93 font = argv[++i];
94 else if(!strcmp(argv[i], "-nb")) /* normal background color */
95 normbgcolor = argv[++i];
96 else if(!strcmp(argv[i], "-nf")) /* normal foreground color */
97 normfgcolor = argv[++i];
98 else if(!strcmp(argv[i], "-sb")) /* selected background color */
99 selbgcolor = argv[++i];
100 else if(!strcmp(argv[i], "-sf")) /* selected foreground color */
101 selfgcolor = argv[++i];
102 else
103 usage();
104
105 dc = initdc();
106 initfont(dc, font);
107
108 if(fast) {
109 grabkeyboard();
110 readstdin();
111 }
112 else {
113 readstdin();
114 grabkeyboard();
115 }
116 setup();
117 run();
118
119 return 1; /* unreachable */
120 }
121
122 void
123 appenditem(Item *item, Item **list, Item **last) {
124 if(*last)
125 (*last)->right = item;
126 else
127 *list = item;
128
129 item->left = *last;
130 item->right = NULL;
131 *last = item;
132 }
133
134 void
135 calcoffsets(void) {
136 int i, n;
137
138 if(lines > 0)
139 n = lines * bh;
140 else
141 n = mw - (promptw + inputw + textw(dc, "<") + textw(dc, ">"));
142 /* calculate which items will begin the next page and previous page */
143 for(i = 0, next = curr; next; next = next->right)
144 if((i += (lines > 0) ? bh : MIN(textw(dc, next->text), n)) > n)
145 break;
146 for(i = 0, prev = curr; prev && prev->left; prev = prev->left)
147 if((i += (lines > 0) ? bh : MIN(textw(dc, prev->left->text), n)) > n)
148 break;
149 }
150
151 char *
152 cistrstr(const char *s, const char *sub) {
153 size_t len;
154
155 for(len = strlen(sub); *s; s++)
156 if(!strncasecmp(s, sub, len))
157 return (char *)s;
158 return NULL;
159 }
160
161 void
162 drawmenu(void) {
163 int curpos;
164 Item *item;
165
166 dc->x = 0;
167 dc->y = 0;
168 dc->h = bh;
169 drawrect(dc, 0, 0, mw, mh, True, BG(dc, normcol));
170
171 if(prompt && *prompt) {
172 dc->w = promptw;
173 drawtext(dc, prompt, selcol);
174 dc->x = dc->w;
175 }
176 /* draw input field */
177 dc->w = (lines > 0 || !matches) ? mw - dc->x : inputw;
178 drawtext(dc, text, normcol);
179 if((curpos = textnw(dc, text, cursor) + dc->h/2 - 2) < dc->w)
180 drawrect(dc, curpos, 2, 1, dc->h - 4, True, FG(dc, normcol));
181
182 if(lines > 0) {
183 /* draw vertical list */
184 dc->w = mw - dc->x;
185 for(item = curr; item != next; item = item->right) {
186 dc->y += dc->h;
187 drawtext(dc, item->text, (item == sel) ? selcol :
188 (item->out) ? outcol : 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 :
201 (item->out) ? outcol : normcol);
202 }
203 dc->w = textw(dc, ">");
204 dc->x = mw - dc->w;
205 if(next)
206 drawtext(dc, ">", normcol);
207 }
208 mapdc(dc, win, mw, mh);
209 }
210
211 void
212 grabkeyboard(void) {
213 int i;
214
215 /* try to grab keyboard, we may have to wait for another process to ungrab */
216 for(i = 0; i < 1000; i++) {
217 if(XGrabKeyboard(dc->dpy, DefaultRootWindow(dc->dpy), True,
218 GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess)
219 return;
220 usleep(1000);
221 }
222 eprintf("cannot grab keyboard\n");
223 }
224
225 void
226 insert(const char *str, ssize_t n) {
227 if(strlen(text) + n > sizeof text - 1)
228 return;
229 /* move existing text out of the way, insert new text, and update cursor */
230 memmove(&text[cursor + n], &text[cursor], sizeof text - cursor - MAX(n, 0));
231 if(n > 0)
232 memcpy(&text[cursor], str, n);
233 cursor += n;
234 match();
235 }
236
237 void
238 keypress(XKeyEvent *ev) {
239 char buf[32];
240 int len;
241 KeySym ksym = NoSymbol;
242 Status status;
243
244 len = XmbLookupString(xic, ev, buf, sizeof buf, &ksym, &status);
245 if(status == XBufferOverflow)
246 return;
247 if(ev->state & ControlMask)
248 switch(ksym) {
249 case XK_a: ksym = XK_Home; break;
250 case XK_b: ksym = XK_Left; break;
251 case XK_c: ksym = XK_Escape; break;
252 case XK_d: ksym = XK_Delete; break;
253 case XK_e: ksym = XK_End; break;
254 case XK_f: ksym = XK_Right; break;
255 case XK_g: ksym = XK_Escape; break;
256 case XK_h: ksym = XK_BackSpace; break;
257 case XK_i: ksym = XK_Tab; break;
258 case XK_j: /* fallthrough */
259 case XK_J: ksym = XK_Return; break;
260 case XK_m: /* fallthrough */
261 case XK_M: ksym = XK_Return; break;
262 case XK_n: ksym = XK_Down; break;
263 case XK_p: ksym = XK_Up; break;
264
265 case XK_k: /* delete right */
266 text[cursor] = '\0';
267 match();
268 break;
269 case XK_u: /* delete left */
270 insert(NULL, 0 - cursor);
271 break;
272 case XK_w: /* delete word */
273 while(cursor > 0 && text[nextrune(-1)] == ' ')
274 insert(NULL, nextrune(-1) - cursor);
275 while(cursor > 0 && text[nextrune(-1)] != ' ')
276 insert(NULL, nextrune(-1) - cursor);
277 break;
278 case XK_y: /* paste selection */
279 XConvertSelection(dc->dpy, (ev->state & ShiftMask) ? clip : XA_PRIMARY,
280 utf8, utf8, win, CurrentTime);
281 return;
282 case XK_Return:
283 case XK_KP_Enter:
284 break;
285 case XK_bracketleft:
286 exit(EXIT_FAILURE);
287 default:
288 return;
289 }
290 else if(ev->state & Mod1Mask)
291 switch(ksym) {
292 case XK_g: ksym = XK_Home; break;
293 case XK_G: ksym = XK_End; break;
294 case XK_h: ksym = XK_Up; break;
295 case XK_j: ksym = XK_Next; break;
296 case XK_k: ksym = XK_Prior; break;
297 case XK_l: ksym = XK_Down; break;
298 default:
299 return;
300 }
301 switch(ksym) {
302 default:
303 if(!iscntrl(*buf))
304 insert(buf, len);
305 break;
306 case XK_Delete:
307 if(text[cursor] == '\0')
308 return;
309 cursor = nextrune(+1);
310 /* fallthrough */
311 case XK_BackSpace:
312 if(cursor == 0)
313 return;
314 insert(NULL, nextrune(-1) - cursor);
315 break;
316 case XK_End:
317 if(text[cursor] != '\0') {
318 cursor = strlen(text);
319 break;
320 }
321 if(next) {
322 /* jump to end of list and position items in reverse */
323 curr = matchend;
324 calcoffsets();
325 curr = prev;
326 calcoffsets();
327 while(next && (curr = curr->right))
328 calcoffsets();
329 }
330 sel = matchend;
331 break;
332 case XK_Escape:
333 exit(EXIT_FAILURE);
334 case XK_Home:
335 if(sel == matches) {
336 cursor = 0;
337 break;
338 }
339 sel = curr = matches;
340 calcoffsets();
341 break;
342 case XK_Left:
343 if(cursor > 0 && (!sel || !sel->left || lines > 0)) {
344 cursor = nextrune(-1);
345 break;
346 }
347 if(lines > 0)
348 return;
349 /* fallthrough */
350 case XK_Up:
351 if(sel && sel->left && (sel = sel->left)->right == curr) {
352 curr = prev;
353 calcoffsets();
354 }
355 break;
356 case XK_Next:
357 if(!next)
358 return;
359 sel = curr = next;
360 calcoffsets();
361 break;
362 case XK_Prior:
363 if(!prev)
364 return;
365 sel = curr = prev;
366 calcoffsets();
367 break;
368 case XK_Return:
369 case XK_KP_Enter:
370 puts((sel && !(ev->state & ShiftMask)) ? sel->text : text);
371 if(!(ev->state & ControlMask))
372 exit(EXIT_SUCCESS);
373 if(sel)
374 sel->out = True;
375 break;
376 case XK_Right:
377 if(text[cursor] != '\0') {
378 cursor = nextrune(+1);
379 break;
380 }
381 if(lines > 0)
382 return;
383 /* fallthrough */
384 case XK_Down:
385 if(sel && sel->right && (sel = sel->right) == next) {
386 curr = next;
387 calcoffsets();
388 }
389 break;
390 case XK_Tab:
391 if(!sel)
392 return;
393 strncpy(text, sel->text, sizeof text - 1);
394 text[sizeof text - 1] = '\0';
395 cursor = strlen(text);
396 match();
397 break;
398 }
399 drawmenu();
400 }
401
402 void
403 match(void) {
404 static char **tokv = NULL;
405 static int tokn = 0;
406
407 char buf[sizeof text], *s;
408 int i, tokc = 0;
409 size_t len;
410 Item *item, *lprefix, *lsubstr, *prefixend, *substrend;
411
412 strcpy(buf, text);
413 /* separate input text into tokens to be matched individually */
414 for(s = strtok(buf, " "); s; tokv[tokc-1] = s, s = strtok(NULL, " "))
415 if(++tokc > tokn && !(tokv = realloc(tokv, ++tokn * sizeof *tokv)))
416 eprintf("cannot realloc %u bytes\n", tokn * sizeof *tokv);
417 len = tokc ? strlen(tokv[0]) : 0;
418
419 matches = lprefix = lsubstr = matchend = prefixend = substrend = NULL;
420 for(item = items; item && item->text; item++) {
421 for(i = 0; i < tokc; i++)
422 if(!fstrstr(item->text, tokv[i]))
423 break;
424 if(i != tokc) /* not all tokens match */
425 continue;
426 /* exact matches go first, then prefixes, then substrings */
427 if(!tokc || !fstrncmp(tokv[0], item->text, len+1))
428 appenditem(item, &matches, &matchend);
429 else if(!fstrncmp(tokv[0], item->text, len))
430 appenditem(item, &lprefix, &prefixend);
431 else
432 appenditem(item, &lsubstr, &substrend);
433 }
434 if(lprefix) {
435 if(matches) {
436 matchend->right = lprefix;
437 lprefix->left = matchend;
438 }
439 else
440 matches = lprefix;
441 matchend = prefixend;
442 }
443 if(lsubstr) {
444 if(matches) {
445 matchend->right = lsubstr;
446 lsubstr->left = matchend;
447 }
448 else
449 matches = lsubstr;
450 matchend = substrend;
451 }
452 curr = sel = matches;
453 calcoffsets();
454 }
455
456 size_t
457 nextrune(int inc) {
458 ssize_t n;
459
460 /* return location of next utf8 rune in the given direction (+1 or -1) */
461 for(n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc);
462 return n;
463 }
464
465 void
466 paste(void) {
467 char *p, *q;
468 int di;
469 unsigned long dl;
470 Atom da;
471
472 /* we have been given the current selection, now insert it into input */
473 XGetWindowProperty(dc->dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
474 utf8, &da, &di, &dl, &dl, (unsigned char **)&p);
475 insert(p, (q = strchr(p, '\n')) ? q-p : (ssize_t)strlen(p));
476 XFree(p);
477 drawmenu();
478 }
479
480 void
481 readstdin(void) {
482 char buf[sizeof text], *p, *maxstr = NULL;
483 size_t i, max = 0, size = 0;
484
485 /* read each line from stdin and add it to the item list */
486 for(i = 0; fgets(buf, sizeof buf, stdin); i++) {
487 if(i+1 >= size / sizeof *items)
488 if(!(items = realloc(items, (size += BUFSIZ))))
489 eprintf("cannot realloc %u bytes:", size);
490 if((p = strchr(buf, '\n')))
491 *p = '\0';
492 if(!(items[i].text = strdup(buf)))
493 eprintf("cannot strdup %u bytes:", strlen(buf)+1);
494 items[i].out = False;
495 if(strlen(items[i].text) > max)
496 max = strlen(maxstr = items[i].text);
497 }
498 if(items)
499 items[i].text = NULL;
500 inputw = maxstr ? textw(dc, maxstr) : 0;
501 lines = MIN(lines, i);
502 }
503
504 void
505 run(void) {
506 XEvent ev;
507
508 while(!XNextEvent(dc->dpy, &ev)) {
509 if(XFilterEvent(&ev, win))
510 continue;
511 switch(ev.type) {
512 case Expose:
513 if(ev.xexpose.count == 0)
514 mapdc(dc, win, mw, mh);
515 break;
516 case KeyPress:
517 keypress(&ev.xkey);
518 break;
519 case SelectionNotify:
520 if(ev.xselection.property == utf8)
521 paste();
522 break;
523 case VisibilityNotify:
524 if(ev.xvisibility.state != VisibilityUnobscured)
525 XRaiseWindow(dc->dpy, win);
526 break;
527 }
528 }
529 }
530
531 void
532 setup(void) {
533 int x, y, screen = DefaultScreen(dc->dpy);
534 Window root = RootWindow(dc->dpy, screen);
535 XSetWindowAttributes swa;
536 XIM xim;
537 #ifdef XINERAMA
538 int n;
539 XineramaScreenInfo *info;
540 #endif
541
542 normcol[ColBG] = getcolor(dc, normbgcolor);
543 normcol[ColFG] = getcolor(dc, normfgcolor);
544 selcol[ColBG] = getcolor(dc, selbgcolor);
545 selcol[ColFG] = getcolor(dc, selfgcolor);
546 outcol[ColBG] = getcolor(dc, outbgcolor);
547 outcol[ColFG] = getcolor(dc, outfgcolor);
548
549 clip = XInternAtom(dc->dpy, "CLIPBOARD", False);
550 utf8 = XInternAtom(dc->dpy, "UTF8_STRING", False);
551
552 /* calculate menu geometry */
553 bh = dc->font.height + 2;
554 lines = MAX(lines, 0);
555 mh = (lines + 1) * bh;
556 #ifdef XINERAMA
557 if((info = XineramaQueryScreens(dc->dpy, &n))) {
558 int a, j, di, i = 0, area = 0;
559 unsigned int du;
560 Window w, pw, dw, *dws;
561 XWindowAttributes wa;
562
563 XGetInputFocus(dc->dpy, &w, &di);
564 if(mon != -1 && mon < n)
565 i = mon;
566 if(!i && w != root && w != PointerRoot && w != None) {
567 /* find top-level window containing current input focus */
568 do {
569 if(XQueryTree(dc->dpy, (pw = w), &dw, &w, &dws, &du) && dws)
570 XFree(dws);
571 } while(w != root && w != pw);
572 /* find xinerama screen with which the window intersects most */
573 if(XGetWindowAttributes(dc->dpy, pw, &wa))
574 for(j = 0; j < n; j++)
575 if((a = INTERSECT(wa.x, wa.y, wa.width, wa.height, info[j])) > area) {
576 area = a;
577 i = j;
578 }
579 }
580 /* no focused window is on screen, so use pointer location instead */
581 if(mon == -1 && !area && XQueryPointer(dc->dpy, root, &dw, &dw, &x, &y, &di, &di, &du))
582 for(i = 0; i < n; i++)
583 if(INTERSECT(x, y, 1, 1, info[i]))
584 break;
585
586 x = info[i].x_org;
587 y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
588 mw = info[i].width;
589 XFree(info);
590 }
591 else
592 #endif
593 {
594 x = 0;
595 y = topbar ? 0 : DisplayHeight(dc->dpy, screen) - mh;
596 mw = DisplayWidth(dc->dpy, screen);
597 }
598 promptw = (prompt && *prompt) ? textw(dc, prompt) : 0;
599 inputw = MIN(inputw, mw/3);
600 match();
601
602 /* create menu window */
603 swa.override_redirect = True;
604 swa.background_pixel = normcol[ColBG];
605 swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
606 win = XCreateWindow(dc->dpy, root, x, y, mw, mh, 0,
607 DefaultDepth(dc->dpy, screen), CopyFromParent,
608 DefaultVisual(dc->dpy, screen),
609 CWOverrideRedirect | CWBackPixel | CWEventMask, &swa);
610
611 /* open input methods */
612 xim = XOpenIM(dc->dpy, NULL, NULL, NULL);
613 xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
614 XNClientWindow, win, XNFocusWindow, win, NULL);
615
616 XMapRaised(dc->dpy, win);
617 resizedc(dc, mw, mh);
618 drawmenu();
619 }
620
621 void
622 usage(void) {
623 fputs("usage: dmenu [-b] [-f] [-i] [-l lines] [-p prompt] [-fn font] [-m monitor]\n"
624 " [-nb color] [-nf color] [-sb color] [-sf color] [-v]\n", stderr);
625 exit(EXIT_FAILURE);
626 }