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[dmenu.git] / dmenu.c
1 /* See LICENSE file for copyright and license details. */
2 #define _BSD_SOURCE
3 #include <ctype.h>
4 #include <locale.h>
5 #include <stdarg.h>
6 #include <stdio.h>
7 #include <stdlib.h>
8 #include <string.h>
9 #include <strings.h>
10 #include <unistd.h>
11 #include <X11/keysym.h>
12 #include <X11/Xlib.h>
13 #include <X11/Xutil.h>
14 #ifdef XINERAMA
15 #include <X11/extensions/Xinerama.h>
16 #endif
17
18 /* macros */
19 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
20
21 /* enums */
22 enum { ColFG, ColBG, ColLast };
23
24 /* typedefs */
25 typedef unsigned int uint;
26 typedef unsigned long ulong;
27 typedef struct {
28 int x, y, w, h;
29 ulong norm[ColLast];
30 ulong sel[ColLast];
31 Drawable drawable;
32 GC gc;
33 struct {
34 XFontStruct *xfont;
35 XFontSet set;
36 int ascent;
37 int descent;
38 int height;
39 } font;
40 } DC; /* draw context */
41
42 typedef struct Item Item;
43 struct Item {
44 char *text;
45 Item *next; /* traverses all items */
46 Item *left, *right; /* traverses items matching current search pattern */
47 };
48
49 /* forward declarations */
50 static void appenditem(Item *i, Item **list, Item **last);
51 static void calcoffsets(void);
52 static char *cistrstr(const char *s, const char *sub);
53 static void cleanup(void);
54 static void drawmenu(void);
55 static void drawtext(const char *text, ulong col[ColLast]);
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 eprint(const char *errstr, ...) {
257 va_list ap;
258
259 va_start(ap, errstr);
260 vfprintf(stderr, errstr, ap);
261 va_end(ap);
262 exit(EXIT_FAILURE);
263 }
264
265 ulong
266 getcolor(const char *colstr) {
267 Colormap cmap = DefaultColormap(dpy, screen);
268 XColor color;
269
270 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
271 eprint("error, cannot allocate color '%s'\n", colstr);
272 return color.pixel;
273 }
274
275 Bool
276 grabkeyboard(void) {
277 uint len;
278
279 for(len = 1000; len; len--) {
280 if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
281 == GrabSuccess)
282 break;
283 usleep(1000);
284 }
285 return len > 0;
286 }
287
288 void
289 initfont(const char *fontstr) {
290 char *def, **missing;
291 int i, n;
292
293 if(!fontstr || fontstr[0] == '\0')
294 eprint("error, cannot load font: '%s'\n", fontstr);
295 missing = NULL;
296 if(dc.font.set)
297 XFreeFontSet(dpy, dc.font.set);
298 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
299 if(missing)
300 XFreeStringList(missing);
301 if(dc.font.set) {
302 XFontSetExtents *font_extents;
303 XFontStruct **xfonts;
304 char **font_names;
305 dc.font.ascent = dc.font.descent = 0;
306 font_extents = XExtentsOfFontSet(dc.font.set);
307 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
308 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
309 if(dc.font.ascent < (*xfonts)->ascent)
310 dc.font.ascent = (*xfonts)->ascent;
311 if(dc.font.descent < (*xfonts)->descent)
312 dc.font.descent = (*xfonts)->descent;
313 xfonts++;
314 }
315 }
316 else {
317 if(dc.font.xfont)
318 XFreeFont(dpy, dc.font.xfont);
319 dc.font.xfont = NULL;
320 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
321 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
322 eprint("error, cannot load font: '%s'\n", fontstr);
323 dc.font.ascent = dc.font.xfont->ascent;
324 dc.font.descent = dc.font.xfont->descent;
325 }
326 dc.font.height = dc.font.ascent + dc.font.descent;
327 }
328
329 void
330 kpress(XKeyEvent * e) {
331 char buf[32];
332 int i, num;
333 uint len;
334 KeySym ksym;
335
336 len = strlen(text);
337 buf[0] = 0;
338 num = XLookupString(e, buf, sizeof buf, &ksym, 0);
339 if(IsKeypadKey(ksym)) {
340 if(ksym == XK_KP_Enter)
341 ksym = XK_Return;
342 else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
343 ksym = (ksym - XK_KP_0) + XK_0;
344 }
345 if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
346 || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
347 || IsPrivateKeypadKey(ksym))
348 return;
349 /* first check if a control mask is omitted */
350 if(e->state & ControlMask) {
351 switch (ksym) {
352 default: /* ignore other control sequences */
353 return;
354 case XK_bracketleft:
355 ksym = XK_Escape;
356 break;
357 case XK_h:
358 case XK_H:
359 ksym = XK_BackSpace;
360 break;
361 case XK_i:
362 case XK_I:
363 ksym = XK_Tab;
364 break;
365 case XK_j:
366 case XK_J:
367 ksym = XK_Return;
368 break;
369 case XK_u:
370 case XK_U:
371 text[0] = 0;
372 match(text);
373 drawmenu();
374 return;
375 case XK_w:
376 case XK_W:
377 if(len) {
378 i = len - 1;
379 while(i >= 0 && text[i] == ' ')
380 text[i--] = 0;
381 while(i >= 0 && text[i] != ' ')
382 text[i--] = 0;
383 match(text);
384 drawmenu();
385 }
386 return;
387 }
388 }
389 if(CLEANMASK(e->state) & Mod1Mask) {
390 switch(ksym) {
391 default: return;
392 case XK_h:
393 ksym = XK_Left;
394 break;
395 case XK_l:
396 ksym = XK_Right;
397 break;
398 case XK_j:
399 ksym = XK_Next;
400 break;
401 case XK_k:
402 ksym = XK_Prior;
403 break;
404 case XK_g:
405 ksym = XK_Home;
406 break;
407 case XK_G:
408 ksym = XK_End;
409 break;
410 }
411 }
412 switch(ksym) {
413 default:
414 if(num && !iscntrl((int) buf[0])) {
415 buf[num] = 0;
416 if(len > 0)
417 strncat(text, buf, sizeof text);
418 else
419 strncpy(text, buf, sizeof text);
420 match(text);
421 }
422 break;
423 case XK_BackSpace:
424 if(len) {
425 text[--len] = 0;
426 match(text);
427 }
428 break;
429 case XK_End:
430 if(!item)
431 return;
432 while(next) {
433 sel = curr = next;
434 calcoffsets();
435 }
436 while(sel && sel->right)
437 sel = sel->right;
438 break;
439 case XK_Escape:
440 ret = 1;
441 running = False;
442 break;
443 case XK_Home:
444 if(!item)
445 return;
446 sel = curr = item;
447 calcoffsets();
448 break;
449 case XK_Left:
450 if(!(sel && sel->left))
451 return;
452 sel=sel->left;
453 if(sel->right == curr) {
454 curr = prev;
455 calcoffsets();
456 }
457 break;
458 case XK_Next:
459 if(!next)
460 return;
461 sel = curr = next;
462 calcoffsets();
463 break;
464 case XK_Prior:
465 if(!prev)
466 return;
467 sel = curr = prev;
468 calcoffsets();
469 break;
470 case XK_Return:
471 if((e->state & ShiftMask) && *text)
472 fprintf(stdout, "%s", text);
473 else if(sel)
474 fprintf(stdout, "%s", sel->text);
475 else if(*text)
476 fprintf(stdout, "%s", text);
477 fflush(stdout);
478 running = False;
479 break;
480 case XK_Right:
481 if(!(sel && sel->right))
482 return;
483 sel=sel->right;
484 if(sel == next) {
485 curr = next;
486 calcoffsets();
487 }
488 break;
489 case XK_Tab:
490 if(!sel)
491 return;
492 strncpy(text, sel->text, sizeof text);
493 match(text);
494 break;
495 }
496 drawmenu();
497 }
498
499 void
500 match(char *pattern) {
501 uint plen;
502 Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
503
504 if(!pattern)
505 return;
506 plen = strlen(pattern);
507 item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
508 for(i = allitems; i; i = i->next)
509 if(!fstrncmp(pattern, i->text, plen + 1))
510 appenditem(i, &lexact, &exactend);
511 else if(!fstrncmp(pattern, i->text, plen))
512 appenditem(i, &lprefix, &prefixend);
513 else if(fstrstr(i->text, pattern))
514 appenditem(i, &lsubstr, &substrend);
515 if(lexact) {
516 item = lexact;
517 itemend = exactend;
518 }
519 if(lprefix) {
520 if(itemend) {
521 itemend->right = lprefix;
522 lprefix->left = itemend;
523 }
524 else
525 item = lprefix;
526 itemend = prefixend;
527 }
528 if(lsubstr) {
529 if(itemend) {
530 itemend->right = lsubstr;
531 lsubstr->left = itemend;
532 }
533 else
534 item = lsubstr;
535 }
536 curr = prev = next = sel = item;
537 calcoffsets();
538 }
539
540 void
541 readstdin(void) {
542 char *p, buf[1024];
543 uint len = 0, max = 0;
544 Item *i, *new;
545
546 i = 0;
547 while(fgets(buf, sizeof buf, stdin)) {
548 len = strlen(buf);
549 if (buf[len - 1] == '\n')
550 buf[len - 1] = 0;
551 if(!(p = strdup(buf)))
552 eprint("fatal: could not strdup() %u bytes\n", strlen(buf));
553 if(max < len) {
554 maxname = p;
555 max = len;
556 }
557 if((new = (Item *)malloc(sizeof(Item))) == NULL)
558 eprint("fatal: could not malloc() %u bytes\n", sizeof(Item));
559 new->next = new->left = new->right = NULL;
560 new->text = p;
561 if(!i)
562 allitems = new;
563 else
564 i->next = new;
565 i = new;
566 }
567 }
568
569 void
570 run(void) {
571 XEvent ev;
572
573 /* main event loop */
574 while(running && !XNextEvent(dpy, &ev))
575 switch (ev.type) {
576 default: /* ignore all crap */
577 break;
578 case KeyPress:
579 kpress(&ev.xkey);
580 break;
581 case Expose:
582 if(ev.xexpose.count == 0)
583 drawmenu();
584 break;
585 }
586 }
587
588 void
589 setup(Bool topbar) {
590 int i, j, x, y;
591 XModifierKeymap *modmap;
592 XSetWindowAttributes wa;
593 #if XINERAMA
594 XineramaScreenInfo *info = NULL;
595 #endif
596
597 /* init modifier map */
598 modmap = XGetModifierMapping(dpy);
599 for(i = 0; i < 8; i++)
600 for(j = 0; j < modmap->max_keypermod; j++) {
601 if(modmap->modifiermap[i * modmap->max_keypermod + j]
602 == XKeysymToKeycode(dpy, XK_Num_Lock))
603 numlockmask = (1 << i);
604 }
605 XFreeModifiermap(modmap);
606
607 /* style */
608 dc.norm[ColBG] = getcolor(normbgcolor);
609 dc.norm[ColFG] = getcolor(normfgcolor);
610 dc.sel[ColBG] = getcolor(selbgcolor);
611 dc.sel[ColFG] = getcolor(selfgcolor);
612 initfont(font);
613
614 /* menu window */
615 wa.override_redirect = 1;
616 wa.background_pixmap = ParentRelative;
617 wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask;
618
619 /* menu window geometry */
620 mh = dc.font.height + 2;
621 #if XINERAMA
622 if(XineramaIsActive(dpy)) {
623 info = XineramaQueryScreens(dpy, &i);
624 x = info[xidx].x_org;
625 y = topbar ? info[xidx].y_org : info[xidx].y_org + info[xidx].height - mh;
626 mw = info[xidx].width;
627 XFree(info);
628 }
629 else
630 #endif
631 {
632 x = 0;
633 y = topbar ? 0 : DisplayHeight(dpy, screen) - mh;
634 mw = DisplayWidth(dpy, screen);
635 }
636
637 win = XCreateWindow(dpy, root, x, y, mw, mh, 0,
638 DefaultDepth(dpy, screen), CopyFromParent,
639 DefaultVisual(dpy, screen),
640 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
641
642 /* pixmap */
643 dc.drawable = XCreatePixmap(dpy, root, mw, mh, DefaultDepth(dpy, screen));
644 dc.gc = XCreateGC(dpy, root, 0, 0);
645 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
646 if(!dc.font.set)
647 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
648 if(maxname)
649 cmdw = textw(maxname);
650 if(cmdw > mw / 3)
651 cmdw = mw / 3;
652 if(prompt)
653 promptw = textw(prompt);
654 if(promptw > mw / 5)
655 promptw = mw / 5;
656 text[0] = 0;
657 match(text);
658 XMapRaised(dpy, win);
659 }
660
661 int
662 textnw(const char *text, uint len) {
663 XRectangle r;
664
665 if(dc.font.set) {
666 XmbTextExtents(dc.font.set, text, len, NULL, &r);
667 return r.width;
668 }
669 return XTextWidth(dc.font.xfont, text, len);
670 }
671
672 int
673 textw(const char *text) {
674 return textnw(text, strlen(text)) + dc.font.height;
675 }
676
677 int
678 main(int argc, char *argv[]) {
679 uint i;
680 Bool topbar = True;
681
682 /* command line args */
683 for(i = 1; i < argc; i++)
684 if(!strcmp(argv[i], "-i")) {
685 fstrncmp = strncasecmp;
686 fstrstr = cistrstr;
687 }
688 else if(!strcmp(argv[i], "-b"))
689 topbar = False;
690 else if(!strcmp(argv[i], "-fn")) {
691 if(++i < argc) font = argv[i];
692 }
693 else if(!strcmp(argv[i], "-nb")) {
694 if(++i < argc) normbgcolor = argv[i];
695 }
696 else if(!strcmp(argv[i], "-nf")) {
697 if(++i < argc) normfgcolor = argv[i];
698 }
699 else if(!strcmp(argv[i], "-p")) {
700 if(++i < argc) prompt = argv[i];
701 }
702 else if(!strcmp(argv[i], "-sb")) {
703 if(++i < argc) selbgcolor = argv[i];
704 }
705 else if(!strcmp(argv[i], "-sf")) {
706 if(++i < argc) selfgcolor = argv[i];
707 }
708 else if(!strcmp(argv[i], "-v"))
709 eprint("dmenu-"VERSION", © 2006-2008 dmenu engineers, see LICENSE for details\n");
710 else
711 eprint("usage: dmenu [-i] [-b] [-fn <font>] [-nb <color>] [-nf <color>]\n"
712 " [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
713 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
714 fprintf(stderr, "warning: no locale support\n");
715 if(!(dpy = XOpenDisplay(0)))
716 eprint("dmenu: cannot open display\n");
717 screen = DefaultScreen(dpy);
718 root = RootWindow(dpy, screen);
719
720 if(isatty(STDIN_FILENO)) {
721 readstdin();
722 running = grabkeyboard();
723 }
724 else { /* prevent keypress loss */
725 running = grabkeyboard();
726 readstdin();
727 }
728
729 setup(topbar);
730 drawmenu();
731 XSync(dpy, False);
732 run();
733 cleanup();
734 XCloseDisplay(dpy);
735 return ret;
736 }