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[dmenu.git] / dmenu.c
1 /* See LICENSE file for copyright and license details. */
2 #include <ctype.h>
3 #include <locale.h>
4 #include <stdarg.h>
5 #include <stdio.h>
6 #include <stdlib.h>
7 #include <string.h>
8 #include <strings.h>
9 #include <unistd.h>
10 #include <X11/keysym.h>
11 #include <X11/Xlib.h>
12 #include <X11/Xutil.h>
13 #ifdef XINERAMA
14 #include <X11/extensions/Xinerama.h>
15 #endif
16
17 /* macros */
18 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
19
20 /* enums */
21 enum { ColFG, ColBG, ColLast };
22
23 /* typedefs */
24 typedef unsigned int uint;
25 typedef unsigned long ulong;
26 typedef struct {
27 int x, y, w, h;
28 ulong norm[ColLast];
29 ulong sel[ColLast];
30 Drawable drawable;
31 GC gc;
32 struct {
33 XFontStruct *xfont;
34 XFontSet set;
35 int ascent;
36 int descent;
37 int height;
38 } font;
39 } DC; /* draw context */
40
41 typedef struct Item Item;
42 struct Item {
43 char *text;
44 Item *next; /* traverses all items */
45 Item *left, *right; /* traverses items matching current search pattern */
46 };
47
48 /* forward declarations */
49 static void appenditem(Item *i, Item **list, Item **last);
50 static void calcoffsets(void);
51 static char *cistrstr(const char *s, const char *sub);
52 static void cleanup(void);
53 static void drawmenu(void);
54 static void drawtext(const char *text, ulong col[ColLast]);
55 static void *emalloc(uint size);
56 static void eprint(const char *errstr, ...);
57 static ulong getcolor(const char *colstr);
58 static Bool grabkeyboard(void);
59 static void initfont(const char *fontstr);
60 static void kpress(XKeyEvent * e);
61 static void match(char *pattern);
62 static void readstdin(void);
63 static void run(void);
64 static void setup(Bool topbar);
65 static int textnw(const char *text, uint len);
66 static int textw(const char *text);
67
68 #include "config.h"
69
70 /* variables */
71 static char *maxname = NULL;
72 static char *prompt = NULL;
73 static char text[4096];
74 static int cmdw = 0;
75 static int promptw = 0;
76 static int ret = 0;
77 static int screen;
78 static uint mw, mh;
79 static uint numlockmask = 0;
80 static Bool running = True;
81 static Display *dpy;
82 static DC dc = {0};
83 static Item *allitems = NULL; /* first of all items */
84 static Item *item = NULL; /* first of pattern matching items */
85 static Item *sel = NULL;
86 static Item *next = NULL;
87 static Item *prev = NULL;
88 static Item *curr = NULL;
89 static Window root, win;
90 static int (*fstrncmp)(const char *, const char *, size_t n) = strncmp;
91 static char *(*fstrstr)(const char *, const char *) = strstr;
92
93 void
94 appenditem(Item *i, Item **list, Item **last) {
95 if(!(*last))
96 *list = i;
97 else
98 (*last)->right = i;
99 i->left = *last;
100 i->right = NULL;
101 *last = i;
102 }
103
104 void
105 calcoffsets(void) {
106 int tw;
107 uint w;
108
109 if(!curr)
110 return;
111 w = promptw + cmdw + 2 * spaceitem;
112 for(next = curr; next; next=next->right) {
113 tw = textw(next->text);
114 if(tw > mw / 3)
115 tw = mw / 3;
116 w += tw;
117 if(w > mw)
118 break;
119 }
120 w = promptw + cmdw + 2 * spaceitem;
121 for(prev = curr; prev && prev->left; prev=prev->left) {
122 tw = textw(prev->left->text);
123 if(tw > mw / 3)
124 tw = mw / 3;
125 w += tw;
126 if(w > mw)
127 break;
128 }
129 }
130
131 char *
132 cistrstr(const char *s, const char *sub) {
133 int c, csub;
134 uint len;
135
136 if(!sub)
137 return (char *)s;
138 if((c = *sub++) != 0) {
139 c = tolower(c);
140 len = strlen(sub);
141 do {
142 do {
143 if((csub = *s++) == 0)
144 return (NULL);
145 }
146 while(tolower(csub) != c);
147 }
148 while(strncasecmp(s, sub, len) != 0);
149 s--;
150 }
151 return (char *)s;
152 }
153
154 void
155 cleanup(void) {
156 Item *itm;
157
158 while(allitems) {
159 itm = allitems->next;
160 free(allitems->text);
161 free(allitems);
162 allitems = itm;
163 }
164 if(dc.font.set)
165 XFreeFontSet(dpy, dc.font.set);
166 else
167 XFreeFont(dpy, dc.font.xfont);
168 XFreePixmap(dpy, dc.drawable);
169 XFreeGC(dpy, dc.gc);
170 XDestroyWindow(dpy, win);
171 XUngrabKeyboard(dpy, CurrentTime);
172 }
173
174 void
175 drawmenu(void) {
176 Item *i;
177
178 dc.x = 0;
179 dc.y = 0;
180 dc.w = mw;
181 dc.h = mh;
182 drawtext(NULL, dc.norm);
183 /* print prompt? */
184 if(promptw) {
185 dc.w = promptw;
186 drawtext(prompt, dc.sel);
187 }
188 dc.x += promptw;
189 dc.w = mw - promptw;
190 /* print command */
191 if(cmdw && item)
192 dc.w = cmdw;
193 drawtext(text[0] ? text : NULL, dc.norm);
194 dc.x += cmdw;
195 if(curr) {
196 dc.w = spaceitem;
197 drawtext((curr && curr->left) ? "<" : NULL, dc.norm);
198 dc.x += dc.w;
199 /* determine maximum items */
200 for(i = curr; i != next; i=i->right) {
201 dc.w = textw(i->text);
202 if(dc.w > mw / 3)
203 dc.w = mw / 3;
204 drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
205 dc.x += dc.w;
206 }
207 dc.x = mw - spaceitem;
208 dc.w = spaceitem;
209 drawtext(next ? ">" : NULL, dc.norm);
210 }
211 XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
212 XFlush(dpy);
213 }
214
215 void
216 drawtext(const char *text, ulong col[ColLast]) {
217 int x, y, w, h;
218 static char buf[256];
219 uint len, olen;
220 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
221
222 XSetForeground(dpy, dc.gc, col[ColBG]);
223 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
224 if(!text)
225 return;
226 w = 0;
227 olen = len = strlen(text);
228 if(len >= sizeof buf)
229 len = sizeof buf - 1;
230 memcpy(buf, text, len);
231 buf[len] = 0;
232 h = dc.font.ascent + dc.font.descent;
233 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
234 x = dc.x + (h / 2);
235 /* shorten text if necessary */
236 while(len && (w = textnw(buf, len)) > dc.w - h)
237 buf[--len] = 0;
238 if(len < olen) {
239 if(len > 1)
240 buf[len - 1] = '.';
241 if(len > 2)
242 buf[len - 2] = '.';
243 if(len > 3)
244 buf[len - 3] = '.';
245 }
246 if(w > dc.w)
247 return; /* too long */
248 XSetForeground(dpy, dc.gc, col[ColFG]);
249 if(dc.font.set)
250 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
251 else
252 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
253 }
254
255 void *
256 emalloc(uint size) {
257 void *res = malloc(size);
258
259 if(!res)
260 eprint("fatal: could not malloc() %u bytes\n", size);
261 return res;
262 }
263
264 void
265 eprint(const char *errstr, ...) {
266 va_list ap;
267
268 va_start(ap, errstr);
269 vfprintf(stderr, errstr, ap);
270 va_end(ap);
271 exit(EXIT_FAILURE);
272 }
273
274 ulong
275 getcolor(const char *colstr) {
276 Colormap cmap = DefaultColormap(dpy, screen);
277 XColor color;
278
279 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
280 eprint("error, cannot allocate color '%s'\n", colstr);
281 return color.pixel;
282 }
283
284 Bool
285 grabkeyboard(void) {
286 uint len;
287
288 for(len = 1000; len; len--) {
289 if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
290 == GrabSuccess)
291 break;
292 usleep(1000);
293 }
294 return len > 0;
295 }
296
297 void
298 initfont(const char *fontstr) {
299 char *def, **missing;
300 int i, n;
301
302 if(!fontstr || fontstr[0] == '\0')
303 eprint("error, cannot load font: '%s'\n", fontstr);
304 missing = NULL;
305 if(dc.font.set)
306 XFreeFontSet(dpy, dc.font.set);
307 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
308 if(missing)
309 XFreeStringList(missing);
310 if(dc.font.set) {
311 XFontSetExtents *font_extents;
312 XFontStruct **xfonts;
313 char **font_names;
314 dc.font.ascent = dc.font.descent = 0;
315 font_extents = XExtentsOfFontSet(dc.font.set);
316 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
317 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
318 if(dc.font.ascent < (*xfonts)->ascent)
319 dc.font.ascent = (*xfonts)->ascent;
320 if(dc.font.descent < (*xfonts)->descent)
321 dc.font.descent = (*xfonts)->descent;
322 xfonts++;
323 }
324 }
325 else {
326 if(dc.font.xfont)
327 XFreeFont(dpy, dc.font.xfont);
328 dc.font.xfont = NULL;
329 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
330 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
331 eprint("error, cannot load font: '%s'\n", fontstr);
332 dc.font.ascent = dc.font.xfont->ascent;
333 dc.font.descent = dc.font.xfont->descent;
334 }
335 dc.font.height = dc.font.ascent + dc.font.descent;
336 }
337
338 void
339 kpress(XKeyEvent * e) {
340 char buf[32];
341 int i, num;
342 uint len;
343 KeySym ksym;
344
345 len = strlen(text);
346 buf[0] = 0;
347 num = XLookupString(e, buf, sizeof buf, &ksym, 0);
348 if(IsKeypadKey(ksym)) {
349 if(ksym == XK_KP_Enter)
350 ksym = XK_Return;
351 else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
352 ksym = (ksym - XK_KP_0) + XK_0;
353 }
354 if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
355 || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
356 || IsPrivateKeypadKey(ksym))
357 return;
358 /* first check if a control mask is omitted */
359 if(e->state & ControlMask) {
360 switch (ksym) {
361 default: /* ignore other control sequences */
362 return;
363 case XK_bracketleft:
364 ksym = XK_Escape;
365 break;
366 case XK_h:
367 case XK_H:
368 ksym = XK_BackSpace;
369 break;
370 case XK_i:
371 case XK_I:
372 ksym = XK_Tab;
373 break;
374 case XK_j:
375 case XK_J:
376 ksym = XK_Return;
377 break;
378 case XK_u:
379 case XK_U:
380 text[0] = 0;
381 match(text);
382 drawmenu();
383 return;
384 case XK_w:
385 case XK_W:
386 if(len) {
387 i = len - 1;
388 while(i >= 0 && text[i] == ' ')
389 text[i--] = 0;
390 while(i >= 0 && text[i] != ' ')
391 text[i--] = 0;
392 match(text);
393 drawmenu();
394 }
395 return;
396 }
397 }
398 if(CLEANMASK(e->state) & Mod1Mask) {
399 switch(ksym) {
400 default: return;
401 case XK_h:
402 ksym = XK_Left;
403 break;
404 case XK_l:
405 ksym = XK_Right;
406 break;
407 case XK_j:
408 ksym = XK_Next;
409 break;
410 case XK_k:
411 ksym = XK_Prior;
412 break;
413 case XK_g:
414 ksym = XK_Home;
415 break;
416 case XK_G:
417 ksym = XK_End;
418 break;
419 }
420 }
421 switch(ksym) {
422 default:
423 if(num && !iscntrl((int) buf[0])) {
424 buf[num] = 0;
425 if(len > 0)
426 strncat(text, buf, sizeof text);
427 else
428 strncpy(text, buf, sizeof text);
429 match(text);
430 }
431 break;
432 case XK_BackSpace:
433 if(len) {
434 text[--len] = 0;
435 match(text);
436 }
437 break;
438 case XK_End:
439 if(!item)
440 return;
441 while(next) {
442 sel = curr = next;
443 calcoffsets();
444 }
445 while(sel && sel->right)
446 sel = sel->right;
447 break;
448 case XK_Escape:
449 ret = 1;
450 running = False;
451 break;
452 case XK_Home:
453 if(!item)
454 return;
455 sel = curr = item;
456 calcoffsets();
457 break;
458 case XK_Left:
459 if(!(sel && sel->left))
460 return;
461 sel=sel->left;
462 if(sel->right == curr) {
463 curr = prev;
464 calcoffsets();
465 }
466 break;
467 case XK_Next:
468 if(!next)
469 return;
470 sel = curr = next;
471 calcoffsets();
472 break;
473 case XK_Prior:
474 if(!prev)
475 return;
476 sel = curr = prev;
477 calcoffsets();
478 break;
479 case XK_Return:
480 if((e->state & ShiftMask) && *text)
481 fprintf(stdout, "%s", text);
482 else if(sel)
483 fprintf(stdout, "%s", sel->text);
484 else if(*text)
485 fprintf(stdout, "%s", text);
486 fflush(stdout);
487 running = False;
488 break;
489 case XK_Right:
490 if(!(sel && sel->right))
491 return;
492 sel=sel->right;
493 if(sel == next) {
494 curr = next;
495 calcoffsets();
496 }
497 break;
498 case XK_Tab:
499 if(!sel)
500 return;
501 strncpy(text, sel->text, sizeof text);
502 match(text);
503 break;
504 }
505 drawmenu();
506 }
507
508 void
509 match(char *pattern) {
510 uint plen;
511 Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
512
513 if(!pattern)
514 return;
515 plen = strlen(pattern);
516 item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
517 for(i = allitems; i; i = i->next)
518 if(!fstrncmp(pattern, i->text, plen + 1))
519 appenditem(i, &lexact, &exactend);
520 else if(!fstrncmp(pattern, i->text, plen))
521 appenditem(i, &lprefix, &prefixend);
522 else if(fstrstr(i->text, pattern))
523 appenditem(i, &lsubstr, &substrend);
524 if(lexact) {
525 item = lexact;
526 itemend = exactend;
527 }
528 if(lprefix) {
529 if(itemend) {
530 itemend->right = lprefix;
531 lprefix->left = itemend;
532 }
533 else
534 item = lprefix;
535 itemend = prefixend;
536 }
537 if(lsubstr) {
538 if(itemend) {
539 itemend->right = lsubstr;
540 lsubstr->left = itemend;
541 }
542 else
543 item = lsubstr;
544 }
545 curr = prev = next = sel = item;
546 calcoffsets();
547 }
548
549 void
550 readstdin(void) {
551 char *p, buf[1024];
552 uint len = 0, max = 0;
553 Item *i, *new;
554
555 i = 0;
556 while(fgets(buf, sizeof buf, stdin)) {
557 len = strlen(buf);
558 if (buf[len - 1] == '\n')
559 buf[len - 1] = 0;
560 if(!(p = strdup(buf)))
561 eprint("fatal: could not strdup() %u bytes\n", strlen(buf));
562 if(max < len) {
563 maxname = p;
564 max = len;
565 }
566 new = emalloc(sizeof(Item));
567 new->next = new->left = new->right = NULL;
568 new->text = p;
569 if(!i)
570 allitems = new;
571 else
572 i->next = new;
573 i = new;
574 }
575 }
576
577 void
578 run(void) {
579 XEvent ev;
580
581 /* main event loop */
582 while(running && !XNextEvent(dpy, &ev))
583 switch (ev.type) {
584 default: /* ignore all crap */
585 break;
586 case KeyPress:
587 kpress(&ev.xkey);
588 break;
589 case Expose:
590 if(ev.xexpose.count == 0)
591 drawmenu();
592 break;
593 }
594 }
595
596 void
597 setup(Bool topbar) {
598 int i, j, x, y;
599 XModifierKeymap *modmap;
600 XSetWindowAttributes wa;
601 #if XINERAMA
602 XineramaScreenInfo *info = NULL;
603 #endif
604
605 /* init modifier map */
606 modmap = XGetModifierMapping(dpy);
607 for(i = 0; i < 8; i++)
608 for(j = 0; j < modmap->max_keypermod; j++) {
609 if(modmap->modifiermap[i * modmap->max_keypermod + j]
610 == XKeysymToKeycode(dpy, XK_Num_Lock))
611 numlockmask = (1 << i);
612 }
613 XFreeModifiermap(modmap);
614
615 /* style */
616 dc.norm[ColBG] = getcolor(normbgcolor);
617 dc.norm[ColFG] = getcolor(normfgcolor);
618 dc.sel[ColBG] = getcolor(selbgcolor);
619 dc.sel[ColFG] = getcolor(selfgcolor);
620 initfont(font);
621
622 /* menu window */
623 wa.override_redirect = 1;
624 wa.background_pixmap = ParentRelative;
625 wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask;
626
627 /* menu window geometry */
628 mh = dc.font.height + 2;
629 #if XINERAMA
630 if(XineramaIsActive(dpy)) {
631 info = XineramaQueryScreens(dpy, &i);
632 x = info[xidx].x_org;
633 y = topbar ? info[xidx].y_org : info[xidx].y_org + info[xidx].height - mh;
634 mw = info[xidx].width;
635 XFree(info);
636 }
637 else
638 #endif
639 {
640 x = 0;
641 y = topbar ? 0 : DisplayHeight(dpy, screen) - mh;
642 mw = DisplayWidth(dpy, screen);
643 }
644
645 win = XCreateWindow(dpy, root, x, y, mw, mh, 0,
646 DefaultDepth(dpy, screen), CopyFromParent,
647 DefaultVisual(dpy, screen),
648 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
649
650 /* pixmap */
651 dc.drawable = XCreatePixmap(dpy, root, mw, mh, DefaultDepth(dpy, screen));
652 dc.gc = XCreateGC(dpy, root, 0, 0);
653 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
654 if(!dc.font.set)
655 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
656 if(maxname)
657 cmdw = textw(maxname);
658 if(cmdw > mw / 3)
659 cmdw = mw / 3;
660 if(prompt)
661 promptw = textw(prompt);
662 if(promptw > mw / 5)
663 promptw = mw / 5;
664 text[0] = 0;
665 match(text);
666 XMapRaised(dpy, win);
667 }
668
669 int
670 textnw(const char *text, uint len) {
671 XRectangle r;
672
673 if(dc.font.set) {
674 XmbTextExtents(dc.font.set, text, len, NULL, &r);
675 return r.width;
676 }
677 return XTextWidth(dc.font.xfont, text, len);
678 }
679
680 int
681 textw(const char *text) {
682 return textnw(text, strlen(text)) + dc.font.height;
683 }
684
685 int
686 main(int argc, char *argv[]) {
687 uint i;
688 Bool topbar = True;
689
690 /* command line args */
691 for(i = 1; i < argc; i++)
692 if(!strcmp(argv[i], "-i")) {
693 fstrncmp = strncasecmp;
694 fstrstr = cistrstr;
695 }
696 else if(!strcmp(argv[i], "-b"))
697 topbar = False;
698 else if(!strcmp(argv[i], "-fn")) {
699 if(++i < argc) font = argv[i];
700 }
701 else if(!strcmp(argv[i], "-nb")) {
702 if(++i < argc) normbgcolor = argv[i];
703 }
704 else if(!strcmp(argv[i], "-nf")) {
705 if(++i < argc) normfgcolor = argv[i];
706 }
707 else if(!strcmp(argv[i], "-p")) {
708 if(++i < argc) prompt = argv[i];
709 }
710 else if(!strcmp(argv[i], "-sb")) {
711 if(++i < argc) selbgcolor = argv[i];
712 }
713 else if(!strcmp(argv[i], "-sf")) {
714 if(++i < argc) selfgcolor = argv[i];
715 }
716 else if(!strcmp(argv[i], "-v"))
717 eprint("dmenu-"VERSION", © 2006-2008 dmenu engineers, see LICENSE for details\n");
718 else
719 eprint("usage: dmenu [-i] [-b] [-fn <font>] [-nb <color>] [-nf <color>]\n"
720 " [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
721 setlocale(LC_CTYPE, "");
722 if(!(dpy = XOpenDisplay(0)))
723 eprint("dmenu: cannot open display\n");
724 screen = DefaultScreen(dpy);
725 root = RootWindow(dpy, screen);
726
727 if(isatty(STDIN_FILENO)) {
728 readstdin();
729 running = grabkeyboard();
730 }
731 else { /* prevent keypress loss */
732 running = grabkeyboard();
733 readstdin();
734 }
735
736 setup(topbar);
737 drawmenu();
738 XSync(dpy, False);
739 run();
740 cleanup();
741 XCloseDisplay(dpy);
742 return ret;
743 }