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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 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
21 #define MIN(a, b) ((a) < (b) ? (a) : (b))
22
23 /* enums */
24 enum { ColFG, ColBG, ColLast };
25
26 /* typedefs */
27 typedef struct {
28 int x, y, w, h;
29 unsigned long norm[ColLast];
30 unsigned long 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, unsigned long col[ColLast]);
56 static void eprint(const char *errstr, ...);
57 static unsigned long 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, unsigned int 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 unsigned int mw, mh;
79 static unsigned int 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 unsigned int 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 unsigned int 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, unsigned long col[ColLast]) {
217 char buf[256];
218 int i, x, y, h, len, olen;
219 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
220
221 XSetForeground(dpy, dc.gc, col[ColBG]);
222 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
223 if(!text)
224 return;
225 olen = strlen(text);
226 h = dc.font.ascent + dc.font.descent;
227 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
228 x = dc.x + (h / 2);
229 /* shorten text if necessary */
230 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
231 if(!len)
232 return;
233 memcpy(buf, text, len);
234 if(len < olen)
235 for(i = len; i && i > len - 3; buf[--i] = '.');
236 XSetForeground(dpy, dc.gc, col[ColFG]);
237 if(dc.font.set)
238 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
239 else
240 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
241 }
242
243 void
244 eprint(const char *errstr, ...) {
245 va_list ap;
246
247 va_start(ap, errstr);
248 vfprintf(stderr, errstr, ap);
249 va_end(ap);
250 exit(EXIT_FAILURE);
251 }
252
253 unsigned long
254 getcolor(const char *colstr) {
255 Colormap cmap = DefaultColormap(dpy, screen);
256 XColor color;
257
258 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
259 eprint("error, cannot allocate color '%s'\n", colstr);
260 return color.pixel;
261 }
262
263 Bool
264 grabkeyboard(void) {
265 unsigned int len;
266
267 for(len = 1000; len; len--) {
268 if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
269 == GrabSuccess)
270 break;
271 usleep(1000);
272 }
273 return len > 0;
274 }
275
276 void
277 initfont(const char *fontstr) {
278 char *def, **missing;
279 int i, n;
280
281 if(!fontstr || fontstr[0] == '\0')
282 eprint("error, cannot load font: '%s'\n", fontstr);
283 missing = NULL;
284 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
285 if(missing)
286 XFreeStringList(missing);
287 if(dc.font.set) {
288 XFontSetExtents *font_extents;
289 XFontStruct **xfonts;
290 char **font_names;
291 dc.font.ascent = dc.font.descent = 0;
292 font_extents = XExtentsOfFontSet(dc.font.set);
293 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
294 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
295 if(dc.font.ascent < (*xfonts)->ascent)
296 dc.font.ascent = (*xfonts)->ascent;
297 if(dc.font.descent < (*xfonts)->descent)
298 dc.font.descent = (*xfonts)->descent;
299 xfonts++;
300 }
301 }
302 else {
303 if(dc.font.xfont)
304 XFreeFont(dpy, dc.font.xfont);
305 dc.font.xfont = NULL;
306 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
307 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
308 eprint("error, cannot load font: '%s'\n", fontstr);
309 dc.font.ascent = dc.font.xfont->ascent;
310 dc.font.descent = dc.font.xfont->descent;
311 }
312 dc.font.height = dc.font.ascent + dc.font.descent;
313 }
314
315 void
316 kpress(XKeyEvent * e) {
317 char buf[32];
318 int i, num;
319 unsigned int len;
320 KeySym ksym;
321
322 len = strlen(text);
323 buf[0] = 0;
324 num = XLookupString(e, buf, sizeof buf, &ksym, 0);
325 if(IsKeypadKey(ksym)) {
326 if(ksym == XK_KP_Enter)
327 ksym = XK_Return;
328 else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
329 ksym = (ksym - XK_KP_0) + XK_0;
330 }
331 if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
332 || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
333 || IsPrivateKeypadKey(ksym))
334 return;
335 /* first check if a control mask is omitted */
336 if(e->state & ControlMask) {
337 switch (ksym) {
338 default: /* ignore other control sequences */
339 return;
340 case XK_bracketleft:
341 ksym = XK_Escape;
342 break;
343 case XK_h:
344 case XK_H:
345 ksym = XK_BackSpace;
346 break;
347 case XK_i:
348 case XK_I:
349 ksym = XK_Tab;
350 break;
351 case XK_j:
352 case XK_J:
353 ksym = XK_Return;
354 break;
355 case XK_u:
356 case XK_U:
357 text[0] = 0;
358 match(text);
359 drawmenu();
360 return;
361 case XK_w:
362 case XK_W:
363 if(len) {
364 i = len - 1;
365 while(i >= 0 && text[i] == ' ')
366 text[i--] = 0;
367 while(i >= 0 && text[i] != ' ')
368 text[i--] = 0;
369 match(text);
370 drawmenu();
371 }
372 return;
373 }
374 }
375 if(CLEANMASK(e->state) & Mod1Mask) {
376 switch(ksym) {
377 default: return;
378 case XK_h:
379 ksym = XK_Left;
380 break;
381 case XK_l:
382 ksym = XK_Right;
383 break;
384 case XK_j:
385 ksym = XK_Next;
386 break;
387 case XK_k:
388 ksym = XK_Prior;
389 break;
390 case XK_g:
391 ksym = XK_Home;
392 break;
393 case XK_G:
394 ksym = XK_End;
395 break;
396 }
397 }
398 switch(ksym) {
399 default:
400 if(num && !iscntrl((int) buf[0])) {
401 buf[num] = 0;
402 if(len > 0)
403 strncat(text, buf, sizeof text);
404 else
405 strncpy(text, buf, sizeof text);
406 match(text);
407 }
408 break;
409 case XK_BackSpace:
410 if(len) {
411 text[--len] = 0;
412 match(text);
413 }
414 break;
415 case XK_End:
416 if(!item)
417 return;
418 while(next) {
419 sel = curr = next;
420 calcoffsets();
421 }
422 while(sel && sel->right)
423 sel = sel->right;
424 break;
425 case XK_Escape:
426 ret = 1;
427 running = False;
428 break;
429 case XK_Home:
430 if(!item)
431 return;
432 sel = curr = item;
433 calcoffsets();
434 break;
435 case XK_Left:
436 if(!(sel && sel->left))
437 return;
438 sel=sel->left;
439 if(sel->right == curr) {
440 curr = prev;
441 calcoffsets();
442 }
443 break;
444 case XK_Next:
445 if(!next)
446 return;
447 sel = curr = next;
448 calcoffsets();
449 break;
450 case XK_Prior:
451 if(!prev)
452 return;
453 sel = curr = prev;
454 calcoffsets();
455 break;
456 case XK_Return:
457 if((e->state & ShiftMask) && *text)
458 fprintf(stdout, "%s", text);
459 else if(sel)
460 fprintf(stdout, "%s", sel->text);
461 else if(*text)
462 fprintf(stdout, "%s", text);
463 fflush(stdout);
464 running = False;
465 break;
466 case XK_Right:
467 if(!(sel && sel->right))
468 return;
469 sel=sel->right;
470 if(sel == next) {
471 curr = next;
472 calcoffsets();
473 }
474 break;
475 case XK_Tab:
476 if(!sel)
477 return;
478 strncpy(text, sel->text, sizeof text);
479 match(text);
480 break;
481 }
482 drawmenu();
483 }
484
485 void
486 match(char *pattern) {
487 unsigned int plen;
488 Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
489
490 if(!pattern)
491 return;
492 plen = strlen(pattern);
493 item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
494 for(i = allitems; i; i = i->next)
495 if(!fstrncmp(pattern, i->text, plen + 1))
496 appenditem(i, &lexact, &exactend);
497 else if(!fstrncmp(pattern, i->text, plen))
498 appenditem(i, &lprefix, &prefixend);
499 else if(fstrstr(i->text, pattern))
500 appenditem(i, &lsubstr, &substrend);
501 if(lexact) {
502 item = lexact;
503 itemend = exactend;
504 }
505 if(lprefix) {
506 if(itemend) {
507 itemend->right = lprefix;
508 lprefix->left = itemend;
509 }
510 else
511 item = lprefix;
512 itemend = prefixend;
513 }
514 if(lsubstr) {
515 if(itemend) {
516 itemend->right = lsubstr;
517 lsubstr->left = itemend;
518 }
519 else
520 item = lsubstr;
521 }
522 curr = prev = next = sel = item;
523 calcoffsets();
524 }
525
526 void
527 readstdin(void) {
528 char *p, buf[1024];
529 unsigned int len = 0, max = 0;
530 Item *i, *new;
531
532 i = 0;
533 while(fgets(buf, sizeof buf, stdin)) {
534 len = strlen(buf);
535 if (buf[len - 1] == '\n')
536 buf[len - 1] = 0;
537 if(!(p = strdup(buf)))
538 eprint("fatal: could not strdup() %u bytes\n", strlen(buf));
539 if(max < len) {
540 maxname = p;
541 max = len;
542 }
543 if((new = (Item *)malloc(sizeof(Item))) == NULL)
544 eprint("fatal: could not malloc() %u bytes\n", sizeof(Item));
545 new->next = new->left = new->right = NULL;
546 new->text = p;
547 if(!i)
548 allitems = new;
549 else
550 i->next = new;
551 i = new;
552 }
553 }
554
555 void
556 run(void) {
557 XEvent ev;
558
559 /* main event loop */
560 while(running && !XNextEvent(dpy, &ev))
561 switch (ev.type) {
562 default: /* ignore all crap */
563 break;
564 case KeyPress:
565 kpress(&ev.xkey);
566 break;
567 case Expose:
568 if(ev.xexpose.count == 0)
569 drawmenu();
570 break;
571 }
572 }
573
574 void
575 setup(Bool topbar) {
576 int i, j, x, y;
577 #if XINERAMA
578 int n;
579 XineramaScreenInfo *info = NULL;
580 #endif
581 XModifierKeymap *modmap;
582 XSetWindowAttributes wa;
583
584 /* init modifier map */
585 modmap = XGetModifierMapping(dpy);
586 for(i = 0; i < 8; i++)
587 for(j = 0; j < modmap->max_keypermod; j++) {
588 if(modmap->modifiermap[i * modmap->max_keypermod + j]
589 == XKeysymToKeycode(dpy, XK_Num_Lock))
590 numlockmask = (1 << i);
591 }
592 XFreeModifiermap(modmap);
593
594 /* style */
595 dc.norm[ColBG] = getcolor(normbgcolor);
596 dc.norm[ColFG] = getcolor(normfgcolor);
597 dc.sel[ColBG] = getcolor(selbgcolor);
598 dc.sel[ColFG] = getcolor(selfgcolor);
599 initfont(font);
600
601 /* menu window */
602 wa.override_redirect = 1;
603 wa.background_pixmap = ParentRelative;
604 wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask;
605
606 /* menu window geometry */
607 mh = dc.font.height + 2;
608 #if XINERAMA
609 if(XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
610 i = 0;
611 if(n > 1) {
612 int di;
613 unsigned int dui;
614 Window dummy;
615 if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
616 for(i = 0; i < n; i++)
617 if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
618 break;
619 }
620 x = info[i].x_org;
621 y = topbar ? info[i].y_org : info[i].y_org + info[i].height - mh;
622 mw = info[i].width;
623 XFree(info);
624 }
625 else
626 #endif
627 {
628 x = 0;
629 y = topbar ? 0 : DisplayHeight(dpy, screen) - mh;
630 mw = DisplayWidth(dpy, screen);
631 }
632
633 win = XCreateWindow(dpy, root, x, y, mw, mh, 0,
634 DefaultDepth(dpy, screen), CopyFromParent,
635 DefaultVisual(dpy, screen),
636 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
637
638 /* pixmap */
639 dc.drawable = XCreatePixmap(dpy, root, mw, mh, DefaultDepth(dpy, screen));
640 dc.gc = XCreateGC(dpy, root, 0, 0);
641 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
642 if(!dc.font.set)
643 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
644 if(maxname)
645 cmdw = textw(maxname);
646 if(cmdw > mw / 3)
647 cmdw = mw / 3;
648 if(prompt)
649 promptw = textw(prompt);
650 if(promptw > mw / 5)
651 promptw = mw / 5;
652 text[0] = 0;
653 match(text);
654 XMapRaised(dpy, win);
655 }
656
657 int
658 textnw(const char *text, unsigned int len) {
659 XRectangle r;
660
661 if(dc.font.set) {
662 XmbTextExtents(dc.font.set, text, len, NULL, &r);
663 return r.width;
664 }
665 return XTextWidth(dc.font.xfont, text, len);
666 }
667
668 int
669 textw(const char *text) {
670 return textnw(text, strlen(text)) + dc.font.height;
671 }
672
673 int
674 main(int argc, char *argv[]) {
675 unsigned int i;
676 Bool topbar = True;
677
678 /* command line args */
679 for(i = 1; i < argc; i++)
680 if(!strcmp(argv[i], "-i")) {
681 fstrncmp = strncasecmp;
682 fstrstr = cistrstr;
683 }
684 else if(!strcmp(argv[i], "-b"))
685 topbar = False;
686 else if(!strcmp(argv[i], "-fn")) {
687 if(++i < argc) font = argv[i];
688 }
689 else if(!strcmp(argv[i], "-nb")) {
690 if(++i < argc) normbgcolor = argv[i];
691 }
692 else if(!strcmp(argv[i], "-nf")) {
693 if(++i < argc) normfgcolor = argv[i];
694 }
695 else if(!strcmp(argv[i], "-p")) {
696 if(++i < argc) prompt = argv[i];
697 }
698 else if(!strcmp(argv[i], "-sb")) {
699 if(++i < argc) selbgcolor = argv[i];
700 }
701 else if(!strcmp(argv[i], "-sf")) {
702 if(++i < argc) selfgcolor = argv[i];
703 }
704 else if(!strcmp(argv[i], "-v"))
705 eprint("dmenu-"VERSION", © 2006-2008 dmenu engineers, see LICENSE for details\n");
706 else
707 eprint("usage: dmenu [-i] [-b] [-fn <font>] [-nb <color>] [-nf <color>]\n"
708 " [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
709 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
710 fprintf(stderr, "warning: no locale support\n");
711 if(!(dpy = XOpenDisplay(0)))
712 eprint("dmenu: cannot open display\n");
713 screen = DefaultScreen(dpy);
714 root = RootWindow(dpy, screen);
715
716 if(isatty(STDIN_FILENO)) {
717 readstdin();
718 running = grabkeyboard();
719 }
720 else { /* prevent keypress loss */
721 running = grabkeyboard();
722 readstdin();
723 }
724
725 setup(topbar);
726 drawmenu();
727 XSync(dpy, False);
728 run();
729 cleanup();
730 XCloseDisplay(dpy);
731 return ret;
732 }