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[dmenu.git] / dmenu.c
1 /* See LICENSE file for copyright and license details. */
2 #include <ctype.h>
3 #include <stdio.h>
4 #include <stdlib.h>
5 #include <string.h>
6 #include <strings.h>
7 #include <unistd.h>
8 #include <X11/Xlib.h>
9 #include <X11/Xatom.h>
10 #include <X11/Xutil.h>
11 #ifdef XINERAMA
12 #include <X11/extensions/Xinerama.h>
13 #endif
14 #include "draw.h"
15
16 #define INRECT(x,y,rx,ry,rw,rh) ((x) >= (rx) && (x) < (rx)+(rw) && (y) >= (ry) && (y) < (ry)+(rh))
17 #define MIN(a,b) ((a) < (b) ? (a) : (b))
18 #define MAX(a,b) ((a) > (b) ? (a) : (b))
19
20 typedef struct Item Item;
21 struct Item {
22 char *text;
23 Item *left, *right;
24 };
25
26 static void appenditem(Item *item, Item **list, Item **last);
27 static void calcoffsets(void);
28 static char *cistrstr(const char *s, const char *sub);
29 static void drawmenu(void);
30 static void grabkeyboard(void);
31 static void insert(const char *str, ssize_t n);
32 static void keypress(XKeyEvent *ev);
33 static void match(void);
34 static size_t nextrune(int inc);
35 static void paste(void);
36 static void readstdin(void);
37 static void run(void);
38 static void setup(void);
39 static void usage(void);
40
41 static char text[BUFSIZ] = "";
42 static int bh, mw, mh;
43 static int inputw, promptw;
44 static int lines = 0;
45 static size_t cursor = 0;
46 static const char *font = NULL;
47 static const char *prompt = NULL;
48 static const char *normbgcolor = "#cccccc";
49 static const char *normfgcolor = "#000000";
50 static const char *selbgcolor = "#0066ff";
51 static const char *selfgcolor = "#ffffff";
52 static unsigned long normcol[ColLast];
53 static unsigned long selcol[ColLast];
54 static Atom utf8;
55 static Bool topbar = True;
56 static DC *dc;
57 static Item *items = NULL;
58 static Item *matches, *matchend;
59 static Item *prev, *curr, *next, *sel;
60 static Window win;
61 static XIC xic;
62
63 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
64 static char *(*fstrstr)(const char *, const char *) = strstr;
65
66 int
67 main(int argc, char *argv[]) {
68 Bool fast = False;
69 int i;
70
71 for(i = 1; i < argc; i++)
72 /* single flags */
73 if(!strcmp(argv[i], "-v")) {
74 puts("dmenu-"VERSION", © 2006-2011 dmenu engineers, see LICENSE for details");
75 exit(EXIT_SUCCESS);
76 }
77 else if(!strcmp(argv[i], "-b"))
78 topbar = False;
79 else if(!strcmp(argv[i], "-f"))
80 fast = True;
81 else if(!strcmp(argv[i], "-i")) {
82 fstrncmp = strncasecmp;
83 fstrstr = cistrstr;
84 }
85 else if(i+1 == argc)
86 usage();
87 /* double flags */
88 else if(!strcmp(argv[i], "-l"))
89 lines = atoi(argv[++i]);
90 else if(!strcmp(argv[i], "-p"))
91 prompt = argv[++i];
92 else if(!strcmp(argv[i], "-fn"))
93 font = argv[++i];
94 else if(!strcmp(argv[i], "-nb"))
95 normbgcolor = argv[++i];
96 else if(!strcmp(argv[i], "-nf"))
97 normfgcolor = argv[++i];
98 else if(!strcmp(argv[i], "-sb"))
99 selbgcolor = argv[++i];
100 else if(!strcmp(argv[i], "-sf"))
101 selfgcolor = argv[++i];
102 else
103 usage();
104
105 dc = initdc();
106 initfont(dc, font);
107
108 if(fast) {
109 grabkeyboard();
110 readstdin();
111 }
112 else {
113 readstdin();
114 grabkeyboard();
115 }
116 setup();
117 run();
118
119 return EXIT_FAILURE; /* unreachable */
120 }
121
122 void
123 appenditem(Item *item, Item **list, Item **last) {
124 if(*last)
125 (*last)->right = item;
126 else
127 *list = item;
128
129 item->left = *last;
130 item->right = NULL;
131 *last = item;
132 }
133
134 void
135 calcoffsets(void) {
136 int i, n;
137
138 if(lines > 0)
139 n = lines * bh;
140 else
141 n = mw - (promptw + inputw + textw(dc, "<") + textw(dc, ">"));
142
143 for(i = 0, next = curr; next; next = next->right)
144 if((i += (lines > 0) ? bh : MIN(textw(dc, next->text), n)) > n)
145 break;
146 for(i = 0, prev = curr; prev && prev->left; prev = prev->left)
147 if((i += (lines > 0) ? bh : MIN(textw(dc, prev->left->text), n)) > n)
148 break;
149 }
150
151 char *
152 cistrstr(const char *s, const char *sub) {
153 size_t len;
154
155 for(len = strlen(sub); *s; s++)
156 if(!strncasecmp(s, sub, len))
157 return (char *)s;
158 return NULL;
159 }
160
161 void
162 drawmenu(void) {
163 int curpos;
164 Item *item;
165
166 dc->x = 0;
167 dc->y = 0;
168 dc->h = bh;
169 drawrect(dc, 0, 0, mw, mh, True, BG(dc, normcol));
170
171 if(prompt) {
172 dc->w = promptw;
173 drawtext(dc, prompt, selcol);
174 dc->x = dc->w;
175 }
176 dc->w = (lines > 0 || !matches) ? mw - dc->x : inputw;
177 drawtext(dc, text, normcol);
178 if((curpos = textnw(dc, text, cursor) + dc->h/2 - 2) < dc->w)
179 drawrect(dc, curpos, 2, 1, dc->h - 4, True, FG(dc, normcol));
180
181 if(lines > 0) {
182 dc->w = mw - dc->x;
183 for(item = curr; item != next; item = item->right) {
184 dc->y += dc->h;
185 drawtext(dc, item->text, (item == sel) ? selcol : normcol);
186 }
187 }
188 else if(matches) {
189 dc->x += inputw;
190 dc->w = textw(dc, "<");
191 if(curr->left)
192 drawtext(dc, "<", normcol);
193 for(item = curr; item != next; item = item->right) {
194 dc->x += dc->w;
195 dc->w = MIN(textw(dc, item->text), mw - dc->x - textw(dc, ">"));
196 drawtext(dc, item->text, (item == sel) ? selcol : normcol);
197 }
198 dc->w = textw(dc, ">");
199 dc->x = mw - dc->w;
200 if(next)
201 drawtext(dc, ">", normcol);
202 }
203 mapdc(dc, win, mw, mh);
204 }
205
206 void
207 grabkeyboard(void) {
208 int i;
209
210 for(i = 0; i < 1000; i++) {
211 if(XGrabKeyboard(dc->dpy, DefaultRootWindow(dc->dpy), True,
212 GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess)
213 return;
214 usleep(1000);
215 }
216 eprintf("cannot grab keyboard\n");
217 }
218
219 void
220 insert(const char *str, ssize_t n) {
221 if(strlen(text) + n > sizeof text - 1)
222 return;
223 memmove(&text[cursor + n], &text[cursor], sizeof text - cursor - MAX(n, 0));
224 if(n > 0)
225 memcpy(&text[cursor], str, n);
226 cursor += n;
227 match();
228 }
229
230 void
231 keypress(XKeyEvent *ev) {
232 char buf[32];
233 KeySym ksym;
234 int len;
235 Status status;
236
237 len = XmbLookupString(xic, ev, buf, sizeof(buf), &ksym, &status);
238 if(ev->state & ControlMask) {
239 KeySym lower, upper;
240
241 XConvertCase(ksym, &lower, &upper);
242 switch(lower) {
243 case XK_a: ksym = XK_Home; break;
244 case XK_b: ksym = XK_Left; break;
245 case XK_c: ksym = XK_Escape; break;
246 case XK_d: ksym = XK_Delete; break;
247 case XK_e: ksym = XK_End; break;
248 case XK_f: ksym = XK_Right; break;
249 case XK_h: ksym = XK_BackSpace; break;
250 case XK_i: ksym = XK_Tab; break;
251 case XK_j: ksym = XK_Return; break;
252 case XK_m: ksym = XK_Return; break;
253 case XK_n: ksym = XK_Up; break;
254 case XK_p: ksym = XK_Down; break;
255
256 case XK_k: /* delete right */
257 text[cursor] = '\0';
258 match();
259 break;
260 case XK_u: /* delete left */
261 insert(NULL, 0 - cursor);
262 break;
263 case XK_w: /* delete word */
264 while(cursor > 0 && text[nextrune(-1)] == ' ')
265 insert(NULL, nextrune(-1) - cursor);
266 while(cursor > 0 && text[nextrune(-1)] != ' ')
267 insert(NULL, nextrune(-1) - cursor);
268 break;
269 case XK_y: /* paste selection */
270 XConvertSelection(dc->dpy, XA_PRIMARY, utf8, utf8, win, CurrentTime);
271 return;
272 default:
273 return;
274 }
275 }
276 switch(ksym) {
277 default:
278 if(!iscntrl(*buf))
279 insert(buf, len);
280 break;
281 case XK_Delete:
282 if(text[cursor] == '\0')
283 return;
284 cursor = nextrune(+1);
285 /* fallthrough */
286 case XK_BackSpace:
287 if(cursor == 0)
288 return;
289 insert(NULL, nextrune(-1) - cursor);
290 break;
291 case XK_End:
292 if(text[cursor] != '\0') {
293 cursor = strlen(text);
294 break;
295 }
296 if(next) {
297 curr = matchend;
298 calcoffsets();
299 curr = prev;
300 calcoffsets();
301 while(next && (curr = curr->right))
302 calcoffsets();
303 }
304 sel = matchend;
305 break;
306 case XK_Escape:
307 exit(EXIT_FAILURE);
308 case XK_Home:
309 if(sel == matches) {
310 cursor = 0;
311 break;
312 }
313 sel = curr = matches;
314 calcoffsets();
315 break;
316 case XK_Left:
317 if(cursor > 0 && (!sel || !sel->left || lines > 0)) {
318 cursor = nextrune(-1);
319 break;
320 }
321 /* fallthrough */
322 case XK_Up:
323 if(sel && sel->left && (sel = sel->left)->right == curr) {
324 curr = prev;
325 calcoffsets();
326 }
327 break;
328 case XK_Next:
329 if(!next)
330 return;
331 sel = curr = next;
332 calcoffsets();
333 break;
334 case XK_Prior:
335 if(!prev)
336 return;
337 sel = curr = prev;
338 calcoffsets();
339 break;
340 case XK_Return:
341 case XK_KP_Enter:
342 puts((sel && !(ev->state & ShiftMask)) ? sel->text : text);
343 exit(EXIT_SUCCESS);
344 case XK_Right:
345 if(text[cursor] != '\0') {
346 cursor = nextrune(+1);
347 break;
348 }
349 /* fallthrough */
350 case XK_Down:
351 if(sel && sel->right && (sel = sel->right) == next) {
352 curr = next;
353 calcoffsets();
354 }
355 break;
356 case XK_Tab:
357 if(!sel)
358 return;
359 strncpy(text, sel->text, sizeof text);
360 cursor = strlen(text);
361 match();
362 break;
363 }
364 drawmenu();
365 }
366
367 void
368 match(void) {
369 static char **tokv = NULL;
370 static int tokn = 0;
371
372 char buf[sizeof text], *s;
373 int i, tokc = 0;
374 size_t len;
375 Item *item, *lprefix, *lsubstr, *prefixend, *substrend;
376
377 strcpy(buf, text);
378 for(s = strtok(buf, " "); s; tokv[tokc-1] = s, s = strtok(NULL, " "))
379 if(++tokc > tokn && !(tokv = realloc(tokv, ++tokn * sizeof *tokv)))
380 eprintf("cannot realloc %u bytes\n", tokn * sizeof *tokv);
381 len = tokc ? strlen(tokv[0]) : 0;
382
383 matches = lprefix = lsubstr = matchend = prefixend = substrend = NULL;
384 for(item = items; item && item->text; item++) {
385 for(i = 0; i < tokc; i++)
386 if(!fstrstr(item->text, tokv[i]))
387 break;
388 if(i != tokc)
389 continue;
390 if(!tokc || !fstrncmp(tokv[0], item->text, len+1))
391 appenditem(item, &matches, &matchend);
392 else if(!fstrncmp(tokv[0], item->text, len))
393 appenditem(item, &lprefix, &prefixend);
394 else
395 appenditem(item, &lsubstr, &substrend);
396 }
397 if(lprefix) {
398 if(matches) {
399 matchend->right = lprefix;
400 lprefix->left = matchend;
401 }
402 else
403 matches = lprefix;
404 matchend = prefixend;
405 }
406 if(lsubstr) {
407 if(matches) {
408 matchend->right = lsubstr;
409 lsubstr->left = matchend;
410 }
411 else
412 matches = lsubstr;
413 matchend = substrend;
414 }
415 curr = sel = matches;
416 calcoffsets();
417 }
418
419 size_t
420 nextrune(int inc) {
421 ssize_t n;
422
423 for(n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc);
424 return n;
425 }
426
427 void
428 paste(void) {
429 char *p, *q;
430 int di;
431 unsigned long dl;
432 Atom da;
433
434 XGetWindowProperty(dc->dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
435 utf8, &da, &di, &dl, &dl, (unsigned char **)&p);
436 insert(p, (q = strchr(p, '\n')) ? q-p : (ssize_t)strlen(p));
437 XFree(p);
438 drawmenu();
439 }
440
441 void
442 readstdin(void) {
443 char buf[sizeof text], *p, *maxstr = NULL;
444 size_t i, max = 0, size = 0;
445
446 for(i = 0; fgets(buf, sizeof buf, stdin); i++) {
447 if(i+1 >= size / sizeof *items)
448 if(!(items = realloc(items, (size += BUFSIZ))))
449 eprintf("cannot realloc %u bytes:", size);
450 if((p = strchr(buf, '\n')))
451 *p = '\0';
452 if(!(items[i].text = strdup(buf)))
453 eprintf("cannot strdup %u bytes:", strlen(buf)+1);
454 if(strlen(items[i].text) > max)
455 max = strlen(maxstr = items[i].text);
456 }
457 if(items)
458 items[i].text = NULL;
459 inputw = maxstr ? textw(dc, maxstr) : 0;
460 lines = MIN(lines, i);
461 }
462
463 void
464 run(void) {
465 XEvent ev;
466
467 while(!XNextEvent(dc->dpy, &ev)) {
468 if(XFilterEvent(&ev, win))
469 continue;
470 switch(ev.type) {
471 case Expose:
472 if(ev.xexpose.count == 0)
473 mapdc(dc, win, mw, mh);
474 break;
475 case KeyPress:
476 keypress(&ev.xkey);
477 break;
478 case SelectionNotify:
479 if(ev.xselection.property == utf8)
480 paste();
481 break;
482 case VisibilityNotify:
483 if(ev.xvisibility.state != VisibilityUnobscured)
484 XRaiseWindow(dc->dpy, win);
485 break;
486 }
487 }
488 }
489
490 void
491 setup(void) {
492 int x, y, screen = DefaultScreen(dc->dpy);
493 Window root = RootWindow(dc->dpy, screen);
494 XSetWindowAttributes swa;
495 XIM xim;
496 #ifdef XINERAMA
497 int n;
498 XineramaScreenInfo *info;
499 #endif
500
501 normcol[ColBG] = getcolor(dc, normbgcolor);
502 normcol[ColFG] = getcolor(dc, normfgcolor);
503 selcol[ColBG] = getcolor(dc, selbgcolor);
504 selcol[ColFG] = getcolor(dc, selfgcolor);
505
506 utf8 = XInternAtom(dc->dpy, "UTF8_STRING", False);
507
508 /* menu geometry */
509 bh = dc->font.height + 2;
510 lines = MAX(lines, 0);
511 mh = (lines + 1) * bh;
512 #ifdef XINERAMA
513 if((info = XineramaQueryScreens(dc->dpy, &n))) {
514 int i, di;
515 unsigned int du;
516 Window w, dw;
517 XWindowAttributes wa;
518
519 XGetInputFocus(dc->dpy, &w, &di);
520 if(w != root && w != PointerRoot && w != None && XGetWindowAttributes(dc->dpy, w, &wa))
521 XTranslateCoordinates(dc->dpy, w, root, wa.x, wa.y, &x, &y, &dw);
522 else
523 XQueryPointer(dc->dpy, root, &dw, &dw, &x, &y, &di, &di, &du);
524 for(i = 0; i < n-1; i++)
525 if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
526 break;
527 x = info[i].x_org;
528 y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
529 mw = info[i].width;
530 XFree(info);
531 }
532 else
533 #endif
534 {
535 x = 0;
536 y = topbar ? 0 : DisplayHeight(dc->dpy, screen) - mh;
537 mw = DisplayWidth(dc->dpy, screen);
538 }
539 promptw = prompt ? textw(dc, prompt) : 0;
540 inputw = MIN(inputw, mw/3);
541 match();
542
543 /* menu window */
544 swa.override_redirect = True;
545 swa.background_pixmap = ParentRelative;
546 swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
547 win = XCreateWindow(dc->dpy, root, x, y, mw, mh, 0,
548 DefaultDepth(dc->dpy, screen), CopyFromParent,
549 DefaultVisual(dc->dpy, screen),
550 CWOverrideRedirect | CWBackPixmap | CWEventMask, &swa);
551
552 /* input methods */
553 xim = XOpenIM(dc->dpy, NULL, NULL, NULL);
554 xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
555 XNClientWindow, win, XNFocusWindow, win, NULL);
556
557 XMapRaised(dc->dpy, win);
558 resizedc(dc, mw, mh);
559 drawmenu();
560 }
561
562 void
563 usage(void) {
564 fputs("usage: dmenu [-b] [-f] [-i] [-l lines] [-p prompt] [-fn font]\n"
565 " [-nb color] [-nf color] [-sb color] [-sf color] [-v]\n", stderr);
566 exit(EXIT_FAILURE);
567 }