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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
22 /* enums */
23 enum { ColFG, ColBG, ColLast };
24
25 /* typedefs */
26 typedef struct {
27 int x, y, w, h;
28 unsigned long norm[ColLast];
29 unsigned long 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, unsigned long col[ColLast]);
55 static void eprint(const char *errstr, ...);
56 static unsigned long getcolor(const char *colstr);
57 static Bool grabkeyboard(void);
58 static void initfont(const char *fontstr);
59 static void kpress(XKeyEvent * e);
60 static void match(char *pattern);
61 static void readstdin(void);
62 static void run(void);
63 static void setup(Bool topbar);
64 static int textnw(const char *text, unsigned int len);
65 static int textw(const char *text);
66
67 #include "config.h"
68
69 /* variables */
70 static char *maxname = NULL;
71 static char *prompt = NULL;
72 static char text[4096];
73 static int cmdw = 0;
74 static int promptw = 0;
75 static int ret = 0;
76 static int screen;
77 static unsigned int mw, mh;
78 static unsigned int numlockmask = 0;
79 static Bool running = True;
80 static Display *dpy;
81 static DC dc = {0};
82 static Item *allitems = NULL; /* first of all items */
83 static Item *item = NULL; /* first of pattern matching items */
84 static Item *sel = NULL;
85 static Item *next = NULL;
86 static Item *prev = NULL;
87 static Item *curr = NULL;
88 static Window root, win;
89 static int (*fstrncmp)(const char *, const char *, size_t n) = strncmp;
90 static char *(*fstrstr)(const char *, const char *) = strstr;
91
92 void
93 appenditem(Item *i, Item **list, Item **last) {
94 if(!(*last))
95 *list = i;
96 else
97 (*last)->right = i;
98 i->left = *last;
99 i->right = NULL;
100 *last = i;
101 }
102
103 void
104 calcoffsets(void) {
105 int tw;
106 unsigned int w;
107
108 if(!curr)
109 return;
110 w = promptw + cmdw + 2 * spaceitem;
111 for(next = curr; next; next=next->right) {
112 tw = textw(next->text);
113 if(tw > mw / 3)
114 tw = mw / 3;
115 w += tw;
116 if(w > mw)
117 break;
118 }
119 w = promptw + cmdw + 2 * spaceitem;
120 for(prev = curr; prev && prev->left; prev=prev->left) {
121 tw = textw(prev->left->text);
122 if(tw > mw / 3)
123 tw = mw / 3;
124 w += tw;
125 if(w > mw)
126 break;
127 }
128 }
129
130 char *
131 cistrstr(const char *s, const char *sub) {
132 int c, csub;
133 unsigned int len;
134
135 if(!sub)
136 return (char *)s;
137 if((c = *sub++) != 0) {
138 c = tolower(c);
139 len = strlen(sub);
140 do {
141 do {
142 if((csub = *s++) == 0)
143 return (NULL);
144 }
145 while(tolower(csub) != c);
146 }
147 while(strncasecmp(s, sub, len) != 0);
148 s--;
149 }
150 return (char *)s;
151 }
152
153 void
154 cleanup(void) {
155 Item *itm;
156
157 while(allitems) {
158 itm = allitems->next;
159 free(allitems->text);
160 free(allitems);
161 allitems = itm;
162 }
163 if(dc.font.set)
164 XFreeFontSet(dpy, dc.font.set);
165 else
166 XFreeFont(dpy, dc.font.xfont);
167 XFreePixmap(dpy, dc.drawable);
168 XFreeGC(dpy, dc.gc);
169 XDestroyWindow(dpy, win);
170 XUngrabKeyboard(dpy, CurrentTime);
171 }
172
173 void
174 drawmenu(void) {
175 Item *i;
176
177 dc.x = 0;
178 dc.y = 0;
179 dc.w = mw;
180 dc.h = mh;
181 drawtext(NULL, dc.norm);
182 /* print prompt? */
183 if(promptw) {
184 dc.w = promptw;
185 drawtext(prompt, dc.sel);
186 }
187 dc.x += promptw;
188 dc.w = mw - promptw;
189 /* print command */
190 if(cmdw && item)
191 dc.w = cmdw;
192 drawtext(text[0] ? text : NULL, dc.norm);
193 dc.x += cmdw;
194 if(curr) {
195 dc.w = spaceitem;
196 drawtext((curr && curr->left) ? "<" : NULL, dc.norm);
197 dc.x += dc.w;
198 /* determine maximum items */
199 for(i = curr; i != next; i=i->right) {
200 dc.w = textw(i->text);
201 if(dc.w > mw / 3)
202 dc.w = mw / 3;
203 drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
204 dc.x += dc.w;
205 }
206 dc.x = mw - spaceitem;
207 dc.w = spaceitem;
208 drawtext(next ? ">" : NULL, dc.norm);
209 }
210 XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
211 XFlush(dpy);
212 }
213
214 void
215 drawtext(const char *text, unsigned long col[ColLast]) {
216 int x, y, w, h;
217 static char buf[256];
218 unsigned int 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 w = 0;
226 olen = len = strlen(text);
227 if(len >= sizeof buf)
228 len = sizeof buf - 1;
229 memcpy(buf, text, len);
230 buf[len] = 0;
231 h = dc.font.ascent + dc.font.descent;
232 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
233 x = dc.x + (h / 2);
234 /* shorten text if necessary */
235 while(len && (w = textnw(buf, len)) > dc.w - h)
236 buf[--len] = 0;
237 if(len < olen) {
238 if(len > 1)
239 buf[len - 1] = '.';
240 if(len > 2)
241 buf[len - 2] = '.';
242 if(len > 3)
243 buf[len - 3] = '.';
244 }
245 if(w > dc.w)
246 return; /* too long */
247 XSetForeground(dpy, dc.gc, col[ColFG]);
248 if(dc.font.set)
249 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
250 else
251 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
252 }
253
254 void
255 eprint(const char *errstr, ...) {
256 va_list ap;
257
258 va_start(ap, errstr);
259 vfprintf(stderr, errstr, ap);
260 va_end(ap);
261 exit(EXIT_FAILURE);
262 }
263
264 unsigned long
265 getcolor(const char *colstr) {
266 Colormap cmap = DefaultColormap(dpy, screen);
267 XColor color;
268
269 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
270 eprint("error, cannot allocate color '%s'\n", colstr);
271 return color.pixel;
272 }
273
274 Bool
275 grabkeyboard(void) {
276 unsigned int len;
277
278 for(len = 1000; len; len--) {
279 if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
280 == GrabSuccess)
281 break;
282 usleep(1000);
283 }
284 return len > 0;
285 }
286
287 void
288 initfont(const char *fontstr) {
289 char *def, **missing;
290 int i, n;
291
292 if(!fontstr || fontstr[0] == '\0')
293 eprint("error, cannot load font: '%s'\n", fontstr);
294 missing = NULL;
295 if(dc.font.set)
296 XFreeFontSet(dpy, dc.font.set);
297 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
298 if(missing)
299 XFreeStringList(missing);
300 if(dc.font.set) {
301 XFontSetExtents *font_extents;
302 XFontStruct **xfonts;
303 char **font_names;
304 dc.font.ascent = dc.font.descent = 0;
305 font_extents = XExtentsOfFontSet(dc.font.set);
306 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
307 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
308 if(dc.font.ascent < (*xfonts)->ascent)
309 dc.font.ascent = (*xfonts)->ascent;
310 if(dc.font.descent < (*xfonts)->descent)
311 dc.font.descent = (*xfonts)->descent;
312 xfonts++;
313 }
314 }
315 else {
316 if(dc.font.xfont)
317 XFreeFont(dpy, dc.font.xfont);
318 dc.font.xfont = NULL;
319 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
320 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
321 eprint("error, cannot load font: '%s'\n", fontstr);
322 dc.font.ascent = dc.font.xfont->ascent;
323 dc.font.descent = dc.font.xfont->descent;
324 }
325 dc.font.height = dc.font.ascent + dc.font.descent;
326 }
327
328 void
329 kpress(XKeyEvent * e) {
330 char buf[32];
331 int i, num;
332 unsigned int len;
333 KeySym ksym;
334
335 len = strlen(text);
336 buf[0] = 0;
337 num = XLookupString(e, buf, sizeof buf, &ksym, 0);
338 if(IsKeypadKey(ksym)) {
339 if(ksym == XK_KP_Enter)
340 ksym = XK_Return;
341 else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
342 ksym = (ksym - XK_KP_0) + XK_0;
343 }
344 if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
345 || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
346 || IsPrivateKeypadKey(ksym))
347 return;
348 /* first check if a control mask is omitted */
349 if(e->state & ControlMask) {
350 switch (ksym) {
351 default: /* ignore other control sequences */
352 return;
353 case XK_bracketleft:
354 ksym = XK_Escape;
355 break;
356 case XK_h:
357 case XK_H:
358 ksym = XK_BackSpace;
359 break;
360 case XK_i:
361 case XK_I:
362 ksym = XK_Tab;
363 break;
364 case XK_j:
365 case XK_J:
366 ksym = XK_Return;
367 break;
368 case XK_u:
369 case XK_U:
370 text[0] = 0;
371 match(text);
372 drawmenu();
373 return;
374 case XK_w:
375 case XK_W:
376 if(len) {
377 i = len - 1;
378 while(i >= 0 && text[i] == ' ')
379 text[i--] = 0;
380 while(i >= 0 && text[i] != ' ')
381 text[i--] = 0;
382 match(text);
383 drawmenu();
384 }
385 return;
386 }
387 }
388 if(CLEANMASK(e->state) & Mod1Mask) {
389 switch(ksym) {
390 default: return;
391 case XK_h:
392 ksym = XK_Left;
393 break;
394 case XK_l:
395 ksym = XK_Right;
396 break;
397 case XK_j:
398 ksym = XK_Next;
399 break;
400 case XK_k:
401 ksym = XK_Prior;
402 break;
403 case XK_g:
404 ksym = XK_Home;
405 break;
406 case XK_G:
407 ksym = XK_End;
408 break;
409 }
410 }
411 switch(ksym) {
412 default:
413 if(num && !iscntrl((int) buf[0])) {
414 buf[num] = 0;
415 if(len > 0)
416 strncat(text, buf, sizeof text);
417 else
418 strncpy(text, buf, sizeof text);
419 match(text);
420 }
421 break;
422 case XK_BackSpace:
423 if(len) {
424 text[--len] = 0;
425 match(text);
426 }
427 break;
428 case XK_End:
429 if(!item)
430 return;
431 while(next) {
432 sel = curr = next;
433 calcoffsets();
434 }
435 while(sel && sel->right)
436 sel = sel->right;
437 break;
438 case XK_Escape:
439 ret = 1;
440 running = False;
441 break;
442 case XK_Home:
443 if(!item)
444 return;
445 sel = curr = item;
446 calcoffsets();
447 break;
448 case XK_Left:
449 if(!(sel && sel->left))
450 return;
451 sel=sel->left;
452 if(sel->right == curr) {
453 curr = prev;
454 calcoffsets();
455 }
456 break;
457 case XK_Next:
458 if(!next)
459 return;
460 sel = curr = next;
461 calcoffsets();
462 break;
463 case XK_Prior:
464 if(!prev)
465 return;
466 sel = curr = prev;
467 calcoffsets();
468 break;
469 case XK_Return:
470 if((e->state & ShiftMask) && *text)
471 fprintf(stdout, "%s", text);
472 else if(sel)
473 fprintf(stdout, "%s", sel->text);
474 else if(*text)
475 fprintf(stdout, "%s", text);
476 fflush(stdout);
477 running = False;
478 break;
479 case XK_Right:
480 if(!(sel && sel->right))
481 return;
482 sel=sel->right;
483 if(sel == next) {
484 curr = next;
485 calcoffsets();
486 }
487 break;
488 case XK_Tab:
489 if(!sel)
490 return;
491 strncpy(text, sel->text, sizeof text);
492 match(text);
493 break;
494 }
495 drawmenu();
496 }
497
498 void
499 match(char *pattern) {
500 unsigned int plen;
501 Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
502
503 if(!pattern)
504 return;
505 plen = strlen(pattern);
506 item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
507 for(i = allitems; i; i = i->next)
508 if(!fstrncmp(pattern, i->text, plen + 1))
509 appenditem(i, &lexact, &exactend);
510 else if(!fstrncmp(pattern, i->text, plen))
511 appenditem(i, &lprefix, &prefixend);
512 else if(fstrstr(i->text, pattern))
513 appenditem(i, &lsubstr, &substrend);
514 if(lexact) {
515 item = lexact;
516 itemend = exactend;
517 }
518 if(lprefix) {
519 if(itemend) {
520 itemend->right = lprefix;
521 lprefix->left = itemend;
522 }
523 else
524 item = lprefix;
525 itemend = prefixend;
526 }
527 if(lsubstr) {
528 if(itemend) {
529 itemend->right = lsubstr;
530 lsubstr->left = itemend;
531 }
532 else
533 item = lsubstr;
534 }
535 curr = prev = next = sel = item;
536 calcoffsets();
537 }
538
539 void
540 readstdin(void) {
541 char *p, buf[1024];
542 unsigned int len = 0, max = 0;
543 Item *i, *new;
544
545 i = 0;
546 while(fgets(buf, sizeof buf, stdin)) {
547 len = strlen(buf);
548 if (buf[len - 1] == '\n')
549 buf[len - 1] = 0;
550 if(!(p = strdup(buf)))
551 eprint("fatal: could not strdup() %u bytes\n", strlen(buf));
552 if(max < len) {
553 maxname = p;
554 max = len;
555 }
556 if((new = (Item *)malloc(sizeof(Item))) == NULL)
557 eprint("fatal: could not malloc() %u bytes\n", sizeof(Item));
558 new->next = new->left = new->right = NULL;
559 new->text = p;
560 if(!i)
561 allitems = new;
562 else
563 i->next = new;
564 i = new;
565 }
566 }
567
568 void
569 run(void) {
570 XEvent ev;
571
572 /* main event loop */
573 while(running && !XNextEvent(dpy, &ev))
574 switch (ev.type) {
575 default: /* ignore all crap */
576 break;
577 case KeyPress:
578 kpress(&ev.xkey);
579 break;
580 case Expose:
581 if(ev.xexpose.count == 0)
582 drawmenu();
583 break;
584 }
585 }
586
587 void
588 setup(Bool topbar) {
589 int i, j, x, y;
590 XModifierKeymap *modmap;
591 XSetWindowAttributes wa;
592 #if XINERAMA
593 XineramaScreenInfo *info = NULL;
594 #endif
595
596 /* init modifier map */
597 modmap = XGetModifierMapping(dpy);
598 for(i = 0; i < 8; i++)
599 for(j = 0; j < modmap->max_keypermod; j++) {
600 if(modmap->modifiermap[i * modmap->max_keypermod + j]
601 == XKeysymToKeycode(dpy, XK_Num_Lock))
602 numlockmask = (1 << i);
603 }
604 XFreeModifiermap(modmap);
605
606 /* style */
607 dc.norm[ColBG] = getcolor(normbgcolor);
608 dc.norm[ColFG] = getcolor(normfgcolor);
609 dc.sel[ColBG] = getcolor(selbgcolor);
610 dc.sel[ColFG] = getcolor(selfgcolor);
611 initfont(font);
612
613 /* menu window */
614 wa.override_redirect = 1;
615 wa.background_pixmap = ParentRelative;
616 wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask;
617
618 /* menu window geometry */
619 mh = dc.font.height + 2;
620 #if XINERAMA
621 if(XineramaIsActive(dpy)) {
622 int n;
623 i = 0;
624 info = XineramaQueryScreens(dpy, &n);
625 if(n > 1) {
626 int di;
627 unsigned int dui;
628 Window dummy;
629 if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
630 for(i = 0; i < n; i++)
631 if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
632 break;
633 }
634 x = info[i].x_org;
635 y = topbar ? info[i].y_org : info[i].y_org + info[i].height - mh;
636 mw = info[i].width;
637 XFree(info);
638 }
639 else
640 #endif
641 {
642 x = 0;
643 y = topbar ? 0 : DisplayHeight(dpy, screen) - mh;
644 mw = DisplayWidth(dpy, screen);
645 }
646
647 win = XCreateWindow(dpy, root, x, y, mw, mh, 0,
648 DefaultDepth(dpy, screen), CopyFromParent,
649 DefaultVisual(dpy, screen),
650 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
651
652 /* pixmap */
653 dc.drawable = XCreatePixmap(dpy, root, mw, mh, DefaultDepth(dpy, screen));
654 dc.gc = XCreateGC(dpy, root, 0, 0);
655 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
656 if(!dc.font.set)
657 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
658 if(maxname)
659 cmdw = textw(maxname);
660 if(cmdw > mw / 3)
661 cmdw = mw / 3;
662 if(prompt)
663 promptw = textw(prompt);
664 if(promptw > mw / 5)
665 promptw = mw / 5;
666 text[0] = 0;
667 match(text);
668 XMapRaised(dpy, win);
669 }
670
671 int
672 textnw(const char *text, unsigned int len) {
673 XRectangle r;
674
675 if(dc.font.set) {
676 XmbTextExtents(dc.font.set, text, len, NULL, &r);
677 return r.width;
678 }
679 return XTextWidth(dc.font.xfont, text, len);
680 }
681
682 int
683 textw(const char *text) {
684 return textnw(text, strlen(text)) + dc.font.height;
685 }
686
687 int
688 main(int argc, char *argv[]) {
689 unsigned int i;
690 Bool topbar = True;
691
692 /* command line args */
693 for(i = 1; i < argc; i++)
694 if(!strcmp(argv[i], "-i")) {
695 fstrncmp = strncasecmp;
696 fstrstr = cistrstr;
697 }
698 else if(!strcmp(argv[i], "-b"))
699 topbar = False;
700 else if(!strcmp(argv[i], "-fn")) {
701 if(++i < argc) font = argv[i];
702 }
703 else if(!strcmp(argv[i], "-nb")) {
704 if(++i < argc) normbgcolor = argv[i];
705 }
706 else if(!strcmp(argv[i], "-nf")) {
707 if(++i < argc) normfgcolor = argv[i];
708 }
709 else if(!strcmp(argv[i], "-p")) {
710 if(++i < argc) prompt = argv[i];
711 }
712 else if(!strcmp(argv[i], "-sb")) {
713 if(++i < argc) selbgcolor = argv[i];
714 }
715 else if(!strcmp(argv[i], "-sf")) {
716 if(++i < argc) selfgcolor = argv[i];
717 }
718 else if(!strcmp(argv[i], "-v"))
719 eprint("dmenu-"VERSION", © 2006-2008 dmenu engineers, see LICENSE for details\n");
720 else
721 eprint("usage: dmenu [-i] [-b] [-fn <font>] [-nb <color>] [-nf <color>]\n"
722 " [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
723 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
724 fprintf(stderr, "warning: no locale support\n");
725 if(!(dpy = XOpenDisplay(0)))
726 eprint("dmenu: cannot open display\n");
727 screen = DefaultScreen(dpy);
728 root = RootWindow(dpy, screen);
729
730 if(isatty(STDIN_FILENO)) {
731 readstdin();
732 running = grabkeyboard();
733 }
734 else { /* prevent keypress loss */
735 running = grabkeyboard();
736 readstdin();
737 }
738
739 setup(topbar);
740 drawmenu();
741 XSync(dpy, False);
742 run();
743 cleanup();
744 XCloseDisplay(dpy);
745 return ret;
746 }