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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 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
20 #define MIN(a, b) ((a) < (b) ? (a) : (b))
21 #define MAX(a, b) ((a) > (b) ? (a) : (b))
22 #define IS_UTF8_1ST_CHAR(c) ((((c) & 0xc0) == 0xc0) || !((c) & 0x80))
23
24 typedef struct Item Item;
25 struct Item {
26 char *text;
27 Item *next; /* traverses all items */
28 Item *left, *right; /* traverses items matching current search pattern */
29 };
30
31 /* forward declarations */
32 static void appenditem(Item *i, Item **list, Item **last);
33 static void calcoffsetsh(void);
34 static void calcoffsetsv(void);
35 static char *cistrstr(const char *s, const char *sub);
36 static void cleanup(void);
37 static void drawmenu(void);
38 static void drawmenuh(void);
39 static void drawmenuv(void);
40 static void eprint(const char *errstr, ...);
41 static Bool grabkeyboard(void);
42 static void kpress(XKeyEvent * e);
43 static void match(char *pattern);
44 static void readstdin(void);
45 static void run(void);
46 static void setup(Bool topbar);
47
48 #include "config.h"
49
50 /* variables */
51 static char *maxname = NULL;
52 static char *prompt = NULL;
53 static char text[4096];
54 static int cmdw = 0;
55 static int promptw = 0;
56 static int ret = 0;
57 static int screen;
58 static unsigned int mw, mh;
59 static unsigned int numlockmask = 0;
60 static Bool running = True;
61 static Display *dpy;
62 static Item *allitems = NULL; /* first of all items */
63 static Item *item = NULL; /* first of pattern matching items */
64 static Item *sel = NULL;
65 static Item *next = NULL;
66 static Item *prev = NULL;
67 static Item *curr = NULL;
68 static Window parent, win;
69 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
70 static char *(*fstrstr)(const char *, const char *) = strstr;
71 static unsigned int lines = 0;
72 static void (*calcoffsets)(void) = calcoffsetsh;
73
74 #include "draw.c"
75
76 void
77 appenditem(Item *i, Item **list, Item **last) {
78 if(!(*last))
79 *list = i;
80 else
81 (*last)->right = i;
82 i->left = *last;
83 i->right = NULL;
84 *last = i;
85 }
86
87 void
88 calcoffsetsh(void) {
89 unsigned int w;
90
91 if(!curr)
92 return;
93 w = promptw + cmdw + 2 * spaceitem;
94 for(next = curr; next && w < mw; next=next->right)
95 w += MIN(textw(next->text), mw / 3);
96 w = promptw + cmdw + 2 * spaceitem;
97 for(prev = curr; prev && prev->left && w < mw; prev=prev->left)
98 w += MIN(textw(prev->left->text), mw / 3);
99 }
100
101 void
102 calcoffsetsv(void) {
103 unsigned int h;
104
105 if(!curr)
106 return;
107 h = (dc.font.height + 2) * lines;
108 for(next = curr; next && h > 0; next = next->right)
109 h -= dc.font.height + 2;
110 h = (dc.font.height + 2) * lines;
111 for(prev = curr; prev && prev->left && h > 0; prev = prev->left)
112 h -= dc.font.height + 2;
113 }
114
115 char *
116 cistrstr(const char *s, const char *sub) {
117 int c, csub;
118 unsigned int len;
119
120 if(!sub)
121 return (char *)s;
122 if((c = tolower(*sub++)) != '\0') {
123 len = strlen(sub);
124 do {
125 do {
126 if((csub = *s++) == '\0')
127 return NULL;
128 }
129 while(tolower(csub) != c);
130 }
131 while(strncasecmp(s, sub, len) != 0);
132 s--;
133 }
134 return (char *)s;
135 }
136
137 void
138 cleanup(void) {
139 dccleanup();
140 XDestroyWindow(dpy, win);
141 XUngrabKeyboard(dpy, CurrentTime);
142 }
143
144 void
145 drawmenu(void) {
146 dc.x = 0;
147 dc.y = 0;
148 dc.w = mw;
149 dc.h = mh;
150 drawtext(NULL, dc.norm);
151 /* print prompt? */
152 if(prompt) {
153 dc.w = promptw;
154 drawtext(prompt, dc.sel);
155 dc.x += dc.w;
156 }
157 dc.w = mw - dc.x;
158 /* print command */
159 if(cmdw && item && lines == 0)
160 dc.w = cmdw;
161 drawtext(*text ? text : NULL, dc.norm);
162 if(curr) {
163 if(lines > 0)
164 drawmenuv();
165 else
166 drawmenuh();
167 }
168 XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
169 XFlush(dpy);
170 }
171
172 void
173 drawmenuh(void) {
174 Item *i;
175
176 dc.x += cmdw;
177 dc.w = spaceitem;
178 drawtext(curr->left ? "<" : NULL, dc.norm);
179 dc.x += dc.w;
180 for(i = curr; i != next; i=i->right) {
181 dc.w = MIN(textw(i->text), mw / 3);
182 drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
183 dc.x += dc.w;
184 }
185 dc.w = spaceitem;
186 dc.x = mw - dc.w;
187 drawtext(next ? ">" : NULL, dc.norm);
188 }
189
190 void
191 drawmenuv(void) {
192 Item *i;
193
194 dc.w = mw - dc.x;
195 dc.h = dc.font.height + 2;
196 dc.y = dc.h;
197 for(i = curr; i != next; i=i->right) {
198 drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
199 dc.y += dc.h;
200 }
201 dc.h = mh - dc.y;
202 drawtext(NULL, dc.norm);
203 }
204
205 void
206 eprint(const char *errstr, ...) {
207 va_list ap;
208
209 va_start(ap, errstr);
210 vfprintf(stderr, errstr, ap);
211 va_end(ap);
212 exit(EXIT_FAILURE);
213 }
214
215 Bool
216 grabkeyboard(void) {
217 unsigned int len;
218
219 for(len = 1000; len; len--) {
220 if(XGrabKeyboard(dpy, parent, True, GrabModeAsync, GrabModeAsync, CurrentTime)
221 == GrabSuccess)
222 break;
223 usleep(1000);
224 }
225 return len > 0;
226 }
227
228 void
229 kpress(XKeyEvent * e) {
230 char buf[sizeof text];
231 int num;
232 unsigned int i, len;
233 KeySym ksym;
234
235 len = strlen(text);
236 num = XLookupString(e, buf, sizeof buf, &ksym, NULL);
237 if(ksym == XK_KP_Enter)
238 ksym = XK_Return;
239 else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
240 ksym = (ksym - XK_KP_0) + XK_0;
241 else if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
242 || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
243 || IsPrivateKeypadKey(ksym))
244 return;
245 /* first check if a control mask is omitted */
246 if(e->state & ControlMask) {
247 switch(tolower(ksym)) {
248 default:
249 return;
250 case XK_a:
251 ksym = XK_Home;
252 break;
253 case XK_b:
254 ksym = XK_Left;
255 break;
256 case XK_c:
257 ksym = XK_Escape;
258 break;
259 case XK_e:
260 ksym = XK_End;
261 break;
262 case XK_f:
263 ksym = XK_Right;
264 break;
265 case XK_h:
266 ksym = XK_BackSpace;
267 break;
268 case XK_i:
269 ksym = XK_Tab;
270 break;
271 case XK_j:
272 ksym = XK_Return;
273 break;
274 case XK_n:
275 ksym = XK_Down;
276 break;
277 case XK_p:
278 ksym = XK_Up;
279 break;
280 case XK_u:
281 text[0] = '\0';
282 match(text);
283 break;
284 case XK_w:
285 if(len == 0)
286 return;
287 i = len;
288 while(i-- > 0 && text[i] == ' ');
289 while(i-- > 0 && text[i] != ' ');
290 text[++i] = '\0';
291 match(text);
292 break;
293 case XK_x:
294 execlp("dinput", "dinput", text, NULL); /* todo: argv */
295 eprint("dmenu: cannot exec dinput:");
296 break;
297 }
298 }
299 switch(ksym) {
300 default:
301 num = MIN(num, sizeof text);
302 if(num && !iscntrl((int) buf[0])) {
303 memcpy(text + len, buf, num + 1);
304 len += num;
305 match(text);
306 }
307 break;
308 case XK_BackSpace:
309 if(len == 0)
310 return;
311 for(i = 1; len - i > 0 && !IS_UTF8_1ST_CHAR(text[len - i]); i++);
312 len -= i;
313 text[len] = '\0';
314 match(text);
315 break;
316 case XK_End:
317 while(next) {
318 sel = curr = next;
319 calcoffsets();
320 }
321 while(sel && sel->right)
322 sel = sel->right;
323 break;
324 case XK_Escape:
325 ret = 1;
326 running = False;
327 return;
328 case XK_Home:
329 sel = curr = item;
330 calcoffsets();
331 break;
332 case XK_Left:
333 case XK_Up:
334 if(!sel || !sel->left)
335 return;
336 sel = sel->left;
337 if(sel->right == curr) {
338 curr = prev;
339 calcoffsets();
340 }
341 break;
342 case XK_Next:
343 if(!next)
344 return;
345 sel = curr = next;
346 calcoffsets();
347 break;
348 case XK_Prior:
349 if(!prev)
350 return;
351 sel = curr = prev;
352 calcoffsets();
353 break;
354 case XK_Return:
355 if((e->state & ShiftMask) || !sel)
356 fprintf(stdout, "%s", text);
357 else
358 fprintf(stdout, "%s", sel->text);
359 fflush(stdout);
360 running = False;
361 return;
362 case XK_Right:
363 case XK_Down:
364 if(!sel || !sel->right)
365 return;
366 sel = sel->right;
367 if(sel == next) {
368 curr = next;
369 calcoffsets();
370 }
371 break;
372 case XK_Tab:
373 if(!sel)
374 return;
375 strncpy(text, sel->text, sizeof text);
376 match(text);
377 break;
378 }
379 drawmenu();
380 }
381
382 void
383 match(char *pattern) {
384 unsigned int plen;
385 Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
386
387 if(!pattern)
388 return;
389 plen = strlen(pattern);
390 item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
391 for(i = allitems; i; i = i->next)
392 if(!fstrncmp(pattern, i->text, plen + 1))
393 appenditem(i, &lexact, &exactend);
394 else if(!fstrncmp(pattern, i->text, plen))
395 appenditem(i, &lprefix, &prefixend);
396 else if(fstrstr(i->text, pattern))
397 appenditem(i, &lsubstr, &substrend);
398 if(lexact) {
399 item = lexact;
400 itemend = exactend;
401 }
402 if(lprefix) {
403 if(itemend) {
404 itemend->right = lprefix;
405 lprefix->left = itemend;
406 }
407 else
408 item = lprefix;
409 itemend = prefixend;
410 }
411 if(lsubstr) {
412 if(itemend) {
413 itemend->right = lsubstr;
414 lsubstr->left = itemend;
415 }
416 else
417 item = lsubstr;
418 }
419 curr = prev = next = sel = item;
420 calcoffsets();
421 }
422
423 void
424 readstdin(void) {
425 char *p, buf[sizeof text];
426 unsigned int len = 0, max = 0;
427 Item *i, *new;
428
429 i = NULL;
430 while(fgets(buf, sizeof buf, stdin)) {
431 len = strlen(buf);
432 if(buf[len-1] == '\n')
433 buf[--len] = '\0';
434 if(!(p = strdup(buf)))
435 eprint("dmenu: cannot strdup %u bytes\n", len);
436 if((max = MAX(max, len)) == len)
437 maxname = p;
438 if(!(new = malloc(sizeof *new)))
439 eprint("dmenu: cannot malloc %u bytes\n", sizeof *new);
440 new->next = new->left = new->right = NULL;
441 new->text = p;
442 if(!i)
443 allitems = new;
444 else
445 i->next = new;
446 i = new;
447 }
448 }
449
450 void
451 run(void) {
452 XEvent ev;
453
454 /* main event loop */
455 while(running && !XNextEvent(dpy, &ev))
456 switch (ev.type) {
457 case KeyPress:
458 kpress(&ev.xkey);
459 break;
460 case Expose:
461 if(ev.xexpose.count == 0)
462 drawmenu();
463 break;
464 case VisibilityNotify:
465 if (ev.xvisibility.state != VisibilityUnobscured)
466 XRaiseWindow(dpy, win);
467 break;
468 }
469 }
470
471 void
472 setup(Bool topbar) {
473 int i, j, x, y;
474 #if XINERAMA
475 int n;
476 XineramaScreenInfo *info = NULL;
477 #endif
478 XModifierKeymap *modmap;
479 XSetWindowAttributes wa;
480 XWindowAttributes pwa;
481
482 /* init modifier map */
483 modmap = XGetModifierMapping(dpy);
484 for(i = 0; i < 8; i++)
485 for(j = 0; j < modmap->max_keypermod; j++) {
486 if(modmap->modifiermap[i * modmap->max_keypermod + j]
487 == XKeysymToKeycode(dpy, XK_Num_Lock))
488 numlockmask = (1 << i);
489 }
490 XFreeModifiermap(modmap);
491
492 initfont(font);
493
494 /* menu window */
495 wa.override_redirect = True;
496 wa.background_pixmap = ParentRelative;
497 wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask | VisibilityChangeMask;
498
499 /* menu window geometry */
500 mh = (dc.font.height + 2) * (lines + 1);
501 #if XINERAMA
502 if(parent == RootWindow(dpy, screen) && XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
503 i = 0;
504 if(n > 1) {
505 int di;
506 unsigned int dui;
507 Window dummy;
508 if(XQueryPointer(dpy, parent, &dummy, &dummy, &x, &y, &di, &di, &dui))
509 for(i = 0; i < n; i++)
510 if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
511 break;
512 }
513 x = info[i].x_org;
514 y = topbar ? info[i].y_org : info[i].y_org + info[i].height - mh;
515 mw = info[i].width;
516 XFree(info);
517 }
518 else
519 #endif
520 {
521 XGetWindowAttributes(dpy, parent, &pwa);
522 x = 0;
523 y = topbar ? 0 : pwa.height - mh;
524 mw = pwa.width;
525 }
526
527 win = XCreateWindow(dpy, parent, x, y, mw, mh, 0,
528 DefaultDepth(dpy, screen), CopyFromParent,
529 DefaultVisual(dpy, screen),
530 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
531
532 dcsetup();
533 if(maxname)
534 cmdw = MIN(textw(maxname), mw / 3);
535 if(prompt)
536 promptw = MIN(textw(prompt), mw / 5);
537 text[0] = '\0';
538 match(text);
539 XMapRaised(dpy, win);
540 }
541
542 int
543 main(int argc, char *argv[]) {
544 unsigned int i;
545 Bool topbar = True;
546
547 /* command line args */
548 for(i = 1; i < argc; i++)
549 if(!strcmp(argv[i], "-i")) {
550 fstrncmp = strncasecmp;
551 fstrstr = cistrstr;
552 }
553 else if(!strcmp(argv[i], "-b"))
554 topbar = False;
555 else if(!strcmp(argv[i], "-e")) {
556 if(++i < argc) parent = atoi(argv[i]);
557 }
558 else if(!strcmp(argv[i], "-l")) {
559 if(++i < argc) lines = atoi(argv[i]);
560 if(lines > 0)
561 calcoffsets = calcoffsetsv;
562 }
563 else if(!strcmp(argv[i], "-fn")) {
564 if(++i < argc) font = argv[i];
565 }
566 else if(!strcmp(argv[i], "-nb")) {
567 if(++i < argc) normbgcolor = argv[i];
568 }
569 else if(!strcmp(argv[i], "-nf")) {
570 if(++i < argc) normfgcolor = argv[i];
571 }
572 else if(!strcmp(argv[i], "-p")) {
573 if(++i < argc) prompt = argv[i];
574 }
575 else if(!strcmp(argv[i], "-sb")) {
576 if(++i < argc) selbgcolor = argv[i];
577 }
578 else if(!strcmp(argv[i], "-sf")) {
579 if(++i < argc) selfgcolor = argv[i];
580 }
581 else if(!strcmp(argv[i], "-v"))
582 eprint("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n");
583 else
584 eprint("usage: dmenu [-i] [-b] [-e <xid>] [-l <lines>] [-fn <font>] [-nb <color>]\n"
585 " [-nf <color>] [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
586 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
587 fprintf(stderr, "dmenu: warning: no locale support\n");
588 if(!(dpy = XOpenDisplay(NULL)))
589 eprint("dmenu: cannot open display\n");
590 screen = DefaultScreen(dpy);
591 if(!parent)
592 parent = RootWindow(dpy, screen);
593
594 readstdin();
595 running = grabkeyboard();
596
597 setup(topbar);
598 drawmenu();
599 XSync(dpy, False);
600 run();
601 cleanup();
602 XCloseDisplay(dpy);
603 return ret;
604 }