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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
58 #include "config.h"
59
60 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
61 static char *(*fstrstr)(const char *, const char *) = strstr;
62
63 int
64 main(int argc, char *argv[]) {
65 Bool fast = False;
66 int i;
67
68 for(i = 1; i < argc; i++)
69 /* these options take no arguments */
70 if(!strcmp(argv[i], "-v")) { /* prints version information */
71 puts("dmenu-"VERSION", © 2006-2012 dmenu engineers, see LICENSE for details");
72 exit(EXIT_SUCCESS);
73 }
74 else if(!strcmp(argv[i], "-b")) /* appears at the bottom of the screen */
75 topbar = False;
76 else if(!strcmp(argv[i], "-f")) /* grabs keyboard before reading stdin */
77 fast = True;
78 else if(!strcmp(argv[i], "-i")) { /* case-insensitive item matching */
79 fstrncmp = strncasecmp;
80 fstrstr = cistrstr;
81 }
82 else if(i+1 == argc)
83 usage();
84 /* these options take one argument */
85 else if(!strcmp(argv[i], "-l")) /* number of lines in vertical list */
86 lines = atoi(argv[++i]);
87 else if(!strcmp(argv[i], "-p")) /* adds prompt to left of input field */
88 prompt = argv[++i];
89 else if(!strcmp(argv[i], "-fn")) /* font or font set */
90 font = argv[++i];
91 else if(!strcmp(argv[i], "-nb")) /* normal background color */
92 normbgcolor = argv[++i];
93 else if(!strcmp(argv[i], "-nf")) /* normal foreground color */
94 normfgcolor = argv[++i];
95 else if(!strcmp(argv[i], "-sb")) /* selected background color */
96 selbgcolor = argv[++i];
97 else if(!strcmp(argv[i], "-sf")) /* selected foreground color */
98 selfgcolor = argv[++i];
99 else
100 usage();
101
102 dc = initdc();
103 initfont(dc, font);
104
105 if(fast) {
106 grabkeyboard();
107 readstdin();
108 }
109 else {
110 readstdin();
111 grabkeyboard();
112 }
113 setup();
114 run();
115
116 return 1; /* unreachable */
117 }
118
119 void
120 appenditem(Item *item, Item **list, Item **last) {
121 if(*last)
122 (*last)->right = item;
123 else
124 *list = item;
125
126 item->left = *last;
127 item->right = NULL;
128 *last = item;
129 }
130
131 void
132 calcoffsets(void) {
133 int i, n;
134
135 if(lines > 0)
136 n = lines * bh;
137 else
138 n = mw - (promptw + inputw + textw(dc, "<") + textw(dc, ">"));
139 /* calculate which items will begin the next page and previous page */
140 for(i = 0, next = curr; next; next = next->right)
141 if((i += (lines > 0) ? bh : MIN(textw(dc, next->text), n)) > n)
142 break;
143 for(i = 0, prev = curr; prev && prev->left; prev = prev->left)
144 if((i += (lines > 0) ? bh : MIN(textw(dc, prev->left->text), n)) > n)
145 break;
146 }
147
148 char *
149 cistrstr(const char *s, const char *sub) {
150 size_t len;
151
152 for(len = strlen(sub); *s; s++)
153 if(!strncasecmp(s, sub, len))
154 return (char *)s;
155 return NULL;
156 }
157
158 void
159 drawmenu(void) {
160 int curpos;
161 Item *item;
162
163 dc->x = 0;
164 dc->y = 0;
165 dc->h = bh;
166 drawrect(dc, 0, 0, mw, mh, True, BG(dc, normcol));
167
168 if(prompt && *prompt) {
169 dc->w = promptw;
170 drawtext(dc, prompt, selcol);
171 dc->x = dc->w;
172 }
173 /* draw input field */
174 dc->w = (lines > 0 || !matches) ? mw - dc->x : inputw;
175 drawtext(dc, text, normcol);
176 if((curpos = textnw(dc, text, cursor) + dc->h/2 - 2) < dc->w)
177 drawrect(dc, curpos, 2, 1, dc->h - 4, True, FG(dc, normcol));
178
179 if(lines > 0) {
180 /* draw vertical list */
181 dc->w = mw - dc->x;
182 for(item = curr; item != next; item = item->right) {
183 dc->y += dc->h;
184 drawtext(dc, item->text, (item == sel) ? selcol :
185 (item->out) ? outcol : normcol);
186 }
187 }
188 else if(matches) {
189 /* draw horizontal list */
190 dc->x += inputw;
191 dc->w = textw(dc, "<");
192 if(curr->left)
193 drawtext(dc, "<", normcol);
194 for(item = curr; item != next; item = item->right) {
195 dc->x += dc->w;
196 dc->w = MIN(textw(dc, item->text), mw - dc->x - textw(dc, ">"));
197 drawtext(dc, item->text, (item == sel) ? selcol :
198 (item->out) ? outcol : normcol);
199 }
200 dc->w = textw(dc, ">");
201 dc->x = mw - dc->w;
202 if(next)
203 drawtext(dc, ">", normcol);
204 }
205 mapdc(dc, win, mw, mh);
206 }
207
208 void
209 grabkeyboard(void) {
210 int i;
211
212 /* try to grab keyboard, we may have to wait for another process to ungrab */
213 for(i = 0; i < 1000; i++) {
214 if(XGrabKeyboard(dc->dpy, DefaultRootWindow(dc->dpy), True,
215 GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess)
216 return;
217 usleep(1000);
218 }
219 eprintf("cannot grab keyboard\n");
220 }
221
222 void
223 insert(const char *str, ssize_t n) {
224 if(strlen(text) + n > sizeof text - 1)
225 return;
226 /* move existing text out of the way, insert new text, and update cursor */
227 memmove(&text[cursor + n], &text[cursor], sizeof text - cursor - MAX(n, 0));
228 if(n > 0)
229 memcpy(&text[cursor], str, n);
230 cursor += n;
231 match();
232 }
233
234 void
235 keypress(XKeyEvent *ev) {
236 char buf[32];
237 int len;
238 KeySym ksym = NoSymbol;
239 Status status;
240
241 len = XmbLookupString(xic, ev, buf, sizeof buf, &ksym, &status);
242 if(status == XBufferOverflow)
243 return;
244 if(ev->state & ControlMask)
245 switch(ksym) {
246 case XK_a: ksym = XK_Home; break;
247 case XK_b: ksym = XK_Left; break;
248 case XK_c: ksym = XK_Escape; break;
249 case XK_d: ksym = XK_Delete; break;
250 case XK_e: ksym = XK_End; break;
251 case XK_f: ksym = XK_Right; break;
252 case XK_g: ksym = XK_Escape; break;
253 case XK_h: ksym = XK_BackSpace; break;
254 case XK_i: ksym = XK_Tab; break;
255 case XK_j: /* fallthrough */
256 case XK_J: ksym = XK_Return; break;
257 case XK_m: /* fallthrough */
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 case XK_Return:
280 case XK_KP_Enter:
281 break;
282 case XK_bracketleft:
283 exit(EXIT_FAILURE);
284 default:
285 return;
286 }
287 else if(ev->state & Mod1Mask)
288 switch(ksym) {
289 case XK_g: ksym = XK_Home; break;
290 case XK_G: ksym = XK_End; break;
291 case XK_h: ksym = XK_Up; break;
292 case XK_j: ksym = XK_Next; break;
293 case XK_k: ksym = XK_Prior; break;
294 case XK_l: ksym = XK_Down; break;
295 default:
296 return;
297 }
298 switch(ksym) {
299 default:
300 if(!iscntrl(*buf))
301 insert(buf, len);
302 break;
303 case XK_Delete:
304 if(text[cursor] == '\0')
305 return;
306 cursor = nextrune(+1);
307 /* fallthrough */
308 case XK_BackSpace:
309 if(cursor == 0)
310 return;
311 insert(NULL, nextrune(-1) - cursor);
312 break;
313 case XK_End:
314 if(text[cursor] != '\0') {
315 cursor = strlen(text);
316 break;
317 }
318 if(next) {
319 /* jump to end of list and position items in reverse */
320 curr = matchend;
321 calcoffsets();
322 curr = prev;
323 calcoffsets();
324 while(next && (curr = curr->right))
325 calcoffsets();
326 }
327 sel = matchend;
328 break;
329 case XK_Escape:
330 exit(EXIT_FAILURE);
331 case XK_Home:
332 if(sel == matches) {
333 cursor = 0;
334 break;
335 }
336 sel = curr = matches;
337 calcoffsets();
338 break;
339 case XK_Left:
340 if(cursor > 0 && (!sel || !sel->left || lines > 0)) {
341 cursor = nextrune(-1);
342 break;
343 }
344 if(lines > 0)
345 return;
346 /* fallthrough */
347 case XK_Up:
348 if(sel && sel->left && (sel = sel->left)->right == curr) {
349 curr = prev;
350 calcoffsets();
351 }
352 break;
353 case XK_Next:
354 if(!next)
355 return;
356 sel = curr = next;
357 calcoffsets();
358 break;
359 case XK_Prior:
360 if(!prev)
361 return;
362 sel = curr = prev;
363 calcoffsets();
364 break;
365 case XK_Return:
366 case XK_KP_Enter:
367 puts((sel && !(ev->state & ShiftMask)) ? sel->text : text);
368 if(!(ev->state & ControlMask))
369 exit(EXIT_SUCCESS);
370 sel->out = True;
371 break;
372 case XK_Right:
373 if(text[cursor] != '\0') {
374 cursor = nextrune(+1);
375 break;
376 }
377 if(lines > 0)
378 return;
379 /* fallthrough */
380 case XK_Down:
381 if(sel && sel->right && (sel = sel->right) == next) {
382 curr = next;
383 calcoffsets();
384 }
385 break;
386 case XK_Tab:
387 if(!sel)
388 return;
389 strncpy(text, sel->text, sizeof text - 1);
390 text[sizeof text - 1] = '\0';
391 cursor = strlen(text);
392 match();
393 break;
394 }
395 drawmenu();
396 }
397
398 void
399 match(void) {
400 static char **tokv = NULL;
401 static int tokn = 0;
402
403 char buf[sizeof text], *s;
404 int i, tokc = 0;
405 size_t len;
406 Item *item, *lprefix, *lsubstr, *prefixend, *substrend;
407
408 strcpy(buf, text);
409 /* separate input text into tokens to be matched individually */
410 for(s = strtok(buf, " "); s; tokv[tokc-1] = s, s = strtok(NULL, " "))
411 if(++tokc > tokn && !(tokv = realloc(tokv, ++tokn * sizeof *tokv)))
412 eprintf("cannot realloc %u bytes\n", tokn * sizeof *tokv);
413 len = tokc ? strlen(tokv[0]) : 0;
414
415 matches = lprefix = lsubstr = matchend = prefixend = substrend = NULL;
416 for(item = items; item && item->text; item++) {
417 for(i = 0; i < tokc; i++)
418 if(!fstrstr(item->text, tokv[i]))
419 break;
420 if(i != tokc) /* not all tokens match */
421 continue;
422 /* exact matches go first, then prefixes, then substrings */
423 if(!tokc || !fstrncmp(tokv[0], item->text, len+1))
424 appenditem(item, &matches, &matchend);
425 else if(!fstrncmp(tokv[0], item->text, len))
426 appenditem(item, &lprefix, &prefixend);
427 else
428 appenditem(item, &lsubstr, &substrend);
429 }
430 if(lprefix) {
431 if(matches) {
432 matchend->right = lprefix;
433 lprefix->left = matchend;
434 }
435 else
436 matches = lprefix;
437 matchend = prefixend;
438 }
439 if(lsubstr) {
440 if(matches) {
441 matchend->right = lsubstr;
442 lsubstr->left = matchend;
443 }
444 else
445 matches = lsubstr;
446 matchend = substrend;
447 }
448 curr = sel = matches;
449 calcoffsets();
450 }
451
452 size_t
453 nextrune(int inc) {
454 ssize_t n;
455
456 /* return location of next utf8 rune in the given direction (+1 or -1) */
457 for(n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc);
458 return n;
459 }
460
461 void
462 paste(void) {
463 char *p, *q;
464 int di;
465 unsigned long dl;
466 Atom da;
467
468 /* we have been given the current selection, now insert it into input */
469 XGetWindowProperty(dc->dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
470 utf8, &da, &di, &dl, &dl, (unsigned char **)&p);
471 insert(p, (q = strchr(p, '\n')) ? q-p : (ssize_t)strlen(p));
472 XFree(p);
473 drawmenu();
474 }
475
476 void
477 readstdin(void) {
478 char buf[sizeof text], *p, *maxstr = NULL;
479 size_t i, max = 0, size = 0;
480
481 /* read each line from stdin and add it to the item list */
482 for(i = 0; fgets(buf, sizeof buf, stdin); i++) {
483 if(i+1 >= size / sizeof *items)
484 if(!(items = realloc(items, (size += BUFSIZ))))
485 eprintf("cannot realloc %u bytes:", size);
486 if((p = strchr(buf, '\n')))
487 *p = '\0';
488 if(!(items[i].text = strdup(buf)))
489 eprintf("cannot strdup %u bytes:", strlen(buf)+1);
490 items[i].out = False;
491 if(strlen(items[i].text) > max)
492 max = strlen(maxstr = items[i].text);
493 }
494 if(items)
495 items[i].text = NULL;
496 inputw = maxstr ? textw(dc, maxstr) : 0;
497 lines = MIN(lines, i);
498 }
499
500 void
501 run(void) {
502 XEvent ev;
503
504 while(!XNextEvent(dc->dpy, &ev)) {
505 if(XFilterEvent(&ev, win))
506 continue;
507 switch(ev.type) {
508 case Expose:
509 if(ev.xexpose.count == 0)
510 mapdc(dc, win, mw, mh);
511 break;
512 case KeyPress:
513 keypress(&ev.xkey);
514 break;
515 case SelectionNotify:
516 if(ev.xselection.property == utf8)
517 paste();
518 break;
519 case VisibilityNotify:
520 if(ev.xvisibility.state != VisibilityUnobscured)
521 XRaiseWindow(dc->dpy, win);
522 break;
523 }
524 }
525 }
526
527 void
528 setup(void) {
529 int x, y, screen = DefaultScreen(dc->dpy);
530 Window root = RootWindow(dc->dpy, screen);
531 XSetWindowAttributes swa;
532 XIM xim;
533 #ifdef XINERAMA
534 int n;
535 XineramaScreenInfo *info;
536 #endif
537
538 normcol[ColBG] = getcolor(dc, normbgcolor);
539 normcol[ColFG] = getcolor(dc, normfgcolor);
540 selcol[ColBG] = getcolor(dc, selbgcolor);
541 selcol[ColFG] = getcolor(dc, selfgcolor);
542 outcol[ColBG] = getcolor(dc, outbgcolor);
543 outcol[ColFG] = getcolor(dc, outfgcolor);
544
545 clip = XInternAtom(dc->dpy, "CLIPBOARD", False);
546 utf8 = XInternAtom(dc->dpy, "UTF8_STRING", False);
547
548 /* calculate menu geometry */
549 bh = dc->font.height + 2;
550 lines = MAX(lines, 0);
551 mh = (lines + 1) * bh;
552 #ifdef XINERAMA
553 if((info = XineramaQueryScreens(dc->dpy, &n))) {
554 int a, j, di, i = 0, area = 0;
555 unsigned int du;
556 Window w, pw, dw, *dws;
557 XWindowAttributes wa;
558
559 XGetInputFocus(dc->dpy, &w, &di);
560 if(w != root && w != PointerRoot && w != None) {
561 /* find top-level window containing current input focus */
562 do {
563 if(XQueryTree(dc->dpy, (pw = w), &dw, &w, &dws, &du) && dws)
564 XFree(dws);
565 } while(w != root && w != pw);
566 /* find xinerama screen with which the window intersects most */
567 if(XGetWindowAttributes(dc->dpy, pw, &wa))
568 for(j = 0; j < n; j++)
569 if((a = INTERSECT(wa.x, wa.y, wa.width, wa.height, info[j])) > area) {
570 area = a;
571 i = j;
572 }
573 }
574 /* no focused window is on screen, so use pointer location instead */
575 if(!area && XQueryPointer(dc->dpy, root, &dw, &dw, &x, &y, &di, &di, &du))
576 for(i = 0; i < n; i++)
577 if(INTERSECT(x, y, 1, 1, info[i]))
578 break;
579
580 x = info[i].x_org;
581 y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
582 mw = info[i].width;
583 XFree(info);
584 }
585 else
586 #endif
587 {
588 x = 0;
589 y = topbar ? 0 : DisplayHeight(dc->dpy, screen) - mh;
590 mw = DisplayWidth(dc->dpy, screen);
591 }
592 promptw = (prompt && *prompt) ? textw(dc, prompt) : 0;
593 inputw = MIN(inputw, mw/3);
594 match();
595
596 /* create menu window */
597 swa.override_redirect = True;
598 swa.background_pixel = normcol[ColBG];
599 swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
600 win = XCreateWindow(dc->dpy, root, x, y, mw, mh, 0,
601 DefaultDepth(dc->dpy, screen), CopyFromParent,
602 DefaultVisual(dc->dpy, screen),
603 CWOverrideRedirect | CWBackPixel | CWEventMask, &swa);
604
605 /* open input methods */
606 xim = XOpenIM(dc->dpy, NULL, NULL, NULL);
607 xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
608 XNClientWindow, win, XNFocusWindow, win, NULL);
609
610 XMapRaised(dc->dpy, win);
611 resizedc(dc, mw, mh);
612 drawmenu();
613 }
614
615 void
616 usage(void) {
617 fputs("usage: dmenu [-b] [-f] [-i] [-l lines] [-p prompt] [-fn font]\n"
618 " [-nb color] [-nf color] [-sb color] [-sf color] [-v]\n", stderr);
619 exit(EXIT_FAILURE);
620 }