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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 <unistd.h>
7 #include <X11/Xatom.h>
8 #include <X11/Xlib.h>
9 #include <X11/Xutil.h>
10 #ifdef XINERAMA
11 #include <X11/extensions/Xinerama.h>
12 #endif
13 #include <draw.h>
14
15 #define INRECT(x,y,rx,ry,rw,rh) ((x) >= (rx) && (x) < (rx)+(rw) && (y) >= (ry) && (y) < (ry)+(rh))
16 #define MIN(a,b) ((a) < (b) ? (a) : (b))
17 #define MAX(a,b) ((a) > (b) ? (a) : (b))
18 #define UTF8_CODEPOINT(c) (((c) & 0xc0) != 0x80)
19
20 typedef struct Item Item;
21 struct Item {
22 char *text;
23 Item *next; /* traverses all items */
24 Item *left, *right; /* traverses matching items */
25 };
26
27 static void appenditem(Item *item, Item **list, Item **last);
28 static void calcoffsets(void);
29 static char *cistrstr(const char *s, const char *sub);
30 static void drawmenu(void);
31 static void grabkeyboard(void);
32 static void insert(const char *s, ssize_t n);
33 static void keypress(XKeyEvent *e);
34 static void match(void);
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[4096];
42 static size_t cursor = 0;
43 static const char *prompt = NULL;
44 static const char *normbgcolor = "#cccccc";
45 static const char *normfgcolor = "#000000";
46 static const char *selbgcolor = "#0066ff";
47 static const char *selfgcolor = "#ffffff";
48 static unsigned int inputw = 0;
49 static unsigned int lines = 0;
50 static unsigned int mw, mh;
51 static unsigned int promptw;
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 *allitems, *matches;
58 static Item *curr, *prev, *next, *sel;
59 static Window root, win;
60
61 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
62 static char *(*fstrstr)(const char *, const char *) = strstr;
63
64 void
65 appenditem(Item *item, Item **list, Item **last) {
66 if(!*last)
67 *list = item;
68 else
69 (*last)->right = item;
70 item->left = *last;
71 item->right = NULL;
72 *last = item;
73 }
74
75 void
76 calcoffsets(void)
77 {
78 unsigned int h, i, n;
79
80 h = dc->font.height+2;
81 if(lines > 0)
82 n = lines * h;
83 else
84 n = mw - (promptw + inputw + textw(dc, "<") + textw(dc, ">"));
85
86 prev = next = curr;
87 for(i = 0; next; next = next->right)
88 if((i += (lines > 0) ? h : MIN(textw(dc, next->text), mw/3)) > n)
89 break;
90 for(i = 0; prev && prev->left; prev = prev->left)
91 if((i += (lines > 0) ? h : MIN(textw(dc, prev->left->text), mw/3)) > n)
92 break;
93 }
94
95 char *
96 cistrstr(const char *s, const char *sub) {
97 size_t len;
98
99 for(len = strlen(sub); *s; s++)
100 if(!strncasecmp(s, sub, len))
101 return (char *)s;
102 return NULL;
103 }
104
105 void
106 drawmenu(void) {
107 Item *item;
108
109 dc->x = 0;
110 dc->y = 0;
111 drawrect(dc, 0, 0, mw, mh, BG(dc, normcol));
112
113 dc->h = dc->font.height + 2;
114 dc->y = topbar ? 0 : mh - dc->h;
115 /* print prompt? */
116 if(prompt) {
117 dc->w = promptw;
118 drawtext(dc, prompt, selcol);
119 dc->x = dc->w;
120 }
121 dc->w = mw - dc->x;
122 /* print input field */
123 if(matches && lines == 0 && textw(dc, text) <= inputw)
124 dc->w = inputw;
125 drawtext(dc, text, normcol);
126 drawrect(dc, textnw(dc, text, cursor) + dc->h/2 - 2, 2, 1, dc->h - 4, FG(dc, normcol));
127
128 if(lines > 0) {
129 dc->y = topbar ? dc->h : 0;
130 dc->w = mw - dc->x;
131 for(item = curr; item != next; item = item->right) {
132 drawtext(dc, item->text, (item == sel) ? selcol : normcol);
133 dc->y += dc->h;
134 }
135 }
136 else if(curr && (dc->w == inputw || curr->next)) {
137 dc->x += inputw;
138 dc->w = textw(dc, "<");
139 if(curr->left)
140 drawtext(dc, "<", normcol);
141 for(item = curr; item != next; item = item->right) {
142 dc->x += dc->w;
143 dc->w = MIN(textw(dc, item->text), mw/3);
144 drawtext(dc, item->text, (item == sel) ? selcol : normcol);
145 }
146 dc->w = textw(dc, ">");
147 dc->x = mw - dc->w;
148 if(next)
149 drawtext(dc, ">", normcol);
150 }
151 commitdraw(dc, win);
152 }
153
154 void
155 grabkeyboard(void) {
156 int i;
157
158 for(i = 0; i < 1000; i++) {
159 if(!XGrabKeyboard(dc->dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime))
160 return;
161 usleep(1000);
162 }
163 eprintf("cannot grab keyboard\n");
164 }
165
166 void
167 insert(const char *s, ssize_t n) {
168 memmove(text + cursor + n, text + cursor, sizeof text - cursor - n);
169 if(n > 0)
170 memcpy(text + cursor, s, n);
171 cursor += n;
172 match();
173 }
174
175 void
176 keypress(XKeyEvent *e) {
177 char buf[sizeof text];
178 int n;
179 size_t len;
180 KeySym ksym;
181
182 len = strlen(text);
183 XLookupString(e, buf, sizeof buf, &ksym, NULL);
184 if(e->state & ControlMask) {
185 switch(tolower(ksym)) {
186 default:
187 return;
188 case XK_a:
189 ksym = XK_Home;
190 break;
191 case XK_b:
192 ksym = XK_Left;
193 break;
194 case XK_c:
195 ksym = XK_Escape;
196 break;
197 case XK_d:
198 ksym = XK_Delete;
199 break;
200 case XK_e:
201 ksym = XK_End;
202 break;
203 case XK_f:
204 ksym = XK_Right;
205 break;
206 case XK_h:
207 ksym = XK_BackSpace;
208 break;
209 case XK_i:
210 ksym = XK_Tab;
211 break;
212 case XK_j:
213 ksym = XK_Return;
214 break;
215 case XK_k: /* delete right */
216 text[cursor] = '\0';
217 match();
218 break;
219 case XK_n:
220 ksym = XK_Down;
221 break;
222 case XK_p:
223 ksym = XK_Up;
224 break;
225 case XK_u: /* delete left */
226 insert(NULL, -cursor);
227 break;
228 case XK_w: /* delete word */
229 if(cursor == 0)
230 return;
231 n = 0;
232 while(cursor - n++ > 0 && text[cursor - n] == ' ');
233 while(cursor - n++ > 0 && text[cursor - n] != ' ');
234 insert(NULL, 1-n);
235 break;
236 case XK_y: /* paste selection */
237 XConvertSelection(dc->dpy, XA_PRIMARY, utf8, None, win, CurrentTime);
238 /* causes SelectionNotify event */
239 return;
240 }
241 }
242 switch(ksym) {
243 default:
244 if(!iscntrl((int)*buf))
245 insert(buf, MIN(strlen(buf), sizeof text - cursor));
246 break;
247 case XK_BackSpace:
248 if(cursor == 0)
249 return;
250 for(n = 1; cursor - n > 0 && !UTF8_CODEPOINT(text[cursor - n]); n++);
251 insert(NULL, -n);
252 break;
253 case XK_Delete:
254 if(cursor == len)
255 return;
256 for(n = 1; cursor + n < len && !UTF8_CODEPOINT(text[cursor + n]); n++);
257 cursor += n;
258 insert(NULL, -n);
259 break;
260 case XK_End:
261 if(cursor < len) {
262 cursor = len;
263 break;
264 }
265 while(next) {
266 sel = curr = next;
267 calcoffsets();
268 }
269 while(sel && sel->right)
270 sel = sel->right;
271 break;
272 case XK_Escape:
273 exit(EXIT_FAILURE);
274 case XK_Home:
275 if(sel == matches) {
276 cursor = 0;
277 break;
278 }
279 sel = curr = matches;
280 calcoffsets();
281 break;
282 case XK_Left:
283 if(cursor > 0 && (!sel || !sel->left || lines > 0)) {
284 while(cursor-- > 0 && !UTF8_CODEPOINT(text[cursor]));
285 break;
286 }
287 else if(lines > 0)
288 return;
289 case XK_Up:
290 if(!sel || !sel->left)
291 return;
292 sel = sel->left;
293 if(sel->right == curr) {
294 curr = prev;
295 calcoffsets();
296 }
297 break;
298 case XK_Next:
299 if(!next)
300 return;
301 sel = curr = next;
302 calcoffsets();
303 break;
304 case XK_Prior:
305 if(!prev)
306 return;
307 sel = curr = prev;
308 calcoffsets();
309 break;
310 case XK_Return:
311 case XK_KP_Enter:
312 fputs((sel && !(e->state & ShiftMask)) ? sel->text : text, stdout);
313 fflush(stdout);
314 exit(EXIT_SUCCESS);
315 case XK_Right:
316 if(cursor < len) {
317 while(cursor++ < len && !UTF8_CODEPOINT(text[cursor]));
318 break;
319 }
320 else if(lines > 0)
321 return;
322 case XK_Down:
323 if(!sel || !sel->right)
324 return;
325 sel = sel->right;
326 if(sel == next) {
327 curr = next;
328 calcoffsets();
329 }
330 break;
331 case XK_Tab:
332 if(!sel)
333 return;
334 strncpy(text, sel->text, sizeof text);
335 cursor = strlen(text);
336 match();
337 break;
338 }
339 drawmenu();
340 }
341
342 void
343 match(void) {
344 size_t len;
345 Item *item, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
346
347 len = strlen(text);
348 matches = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
349 for(item = allitems; item; item = item->next)
350 if(!fstrncmp(text, item->text, len + 1))
351 appenditem(item, &lexact, &exactend);
352 else if(!fstrncmp(text, item->text, len))
353 appenditem(item, &lprefix, &prefixend);
354 else if(fstrstr(item->text, text))
355 appenditem(item, &lsubstr, &substrend);
356 if(lexact) {
357 matches = lexact;
358 itemend = exactend;
359 }
360 if(lprefix) {
361 if(itemend) {
362 itemend->right = lprefix;
363 lprefix->left = itemend;
364 }
365 else
366 matches = lprefix;
367 itemend = prefixend;
368 }
369 if(lsubstr) {
370 if(itemend) {
371 itemend->right = lsubstr;
372 lsubstr->left = itemend;
373 }
374 else
375 matches = lsubstr;
376 }
377 curr = prev = next = sel = matches;
378 calcoffsets();
379 }
380
381 void
382 paste(void) {
383 char *p, *q;
384 int di;
385 unsigned long dl;
386 Atom da;
387
388 XGetWindowProperty(dc->dpy, win, utf8, 0, sizeof text - cursor, True,
389 utf8, &da, &di, &dl, &dl, (unsigned char **)&p);
390 insert(p, (q = strchr(p, '\n')) ? q-p : strlen(p));
391 XFree(p);
392 drawmenu();
393 }
394
395 void
396 readstdin(void) {
397 char buf[sizeof text], *p;
398 Item *item, *new;
399
400 allitems = NULL;
401 for(item = NULL; fgets(buf, sizeof buf, stdin); item = new) {
402 if((p = strchr(buf, '\n')))
403 *p = '\0';
404 if(!(new = malloc(sizeof *new)))
405 eprintf("cannot malloc %u bytes\n", sizeof *new);
406 if(!(new->text = strdup(buf)))
407 eprintf("cannot strdup %u bytes\n", strlen(buf));
408 inputw = MAX(inputw, textw(dc, new->text));
409 new->next = new->left = new->right = NULL;
410 if(item)
411 item->next = new;
412 else
413 allitems = new;
414 }
415 }
416
417 void
418 run(void) {
419 XEvent ev;
420
421 while(!XNextEvent(dc->dpy, &ev))
422 switch(ev.type) {
423 case Expose:
424 if(ev.xexpose.count == 0)
425 drawmenu();
426 break;
427 case KeyPress:
428 keypress(&ev.xkey);
429 break;
430 case SelectionNotify:
431 if(ev.xselection.property == utf8)
432 paste();
433 break;
434 case VisibilityNotify:
435 if(ev.xvisibility.state != VisibilityUnobscured)
436 XRaiseWindow(dc->dpy, win);
437 break;
438 }
439 }
440
441 void
442 setup(void) {
443 int x, y, screen;
444 XSetWindowAttributes wa;
445 #ifdef XINERAMA
446 int n;
447 XineramaScreenInfo *info;
448 #endif
449
450 screen = DefaultScreen(dc->dpy);
451 root = RootWindow(dc->dpy, screen);
452 utf8 = XInternAtom(dc->dpy, "UTF8_STRING", False);
453
454 normcol[ColBG] = getcolor(dc, normbgcolor);
455 normcol[ColFG] = getcolor(dc, normfgcolor);
456 selcol[ColBG] = getcolor(dc, selbgcolor);
457 selcol[ColFG] = getcolor(dc, selfgcolor);
458
459 /* menu geometry */
460 mh = (dc->font.height + 2) * (lines + 1);
461 #ifdef XINERAMA
462 if((info = XineramaQueryScreens(dc->dpy, &n))) {
463 int i, di;
464 unsigned int du;
465 Window dw;
466
467 XQueryPointer(dc->dpy, root, &dw, &dw, &x, &y, &di, &di, &du);
468 for(i = 0; i < n; i++)
469 if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
470 break;
471 x = info[i].x_org;
472 y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
473 mw = info[i].width;
474 XFree(info);
475 }
476 else
477 #endif
478 {
479 x = 0;
480 y = topbar ? 0 : DisplayHeight(dc->dpy, screen) - mh;
481 mw = DisplayWidth(dc->dpy, screen);
482 }
483 /* menu window */
484 wa.override_redirect = True;
485 wa.background_pixmap = ParentRelative;
486 wa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
487 win = XCreateWindow(dc->dpy, root, x, y, mw, mh, 0,
488 DefaultDepth(dc->dpy, screen), CopyFromParent,
489 DefaultVisual(dc->dpy, screen),
490 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
491
492 grabkeyboard();
493 setcanvas(dc, mw, mh);
494 inputw = MIN(inputw, mw/3);
495 promptw = prompt ? MIN(textw(dc, prompt), mw/5) : 0;
496 XMapRaised(dc->dpy, win);
497 text[0] = '\0';
498 match();
499 }
500
501 void
502 usage(void) {
503 fputs("usage: dmenu [-b] [-i] [-l lines] [-p prompt] [-fn font] [-nb color]\n"
504 " [-nf color] [-sb color] [-sf color] [-v]\n", stderr);
505 exit(EXIT_FAILURE);
506 }
507
508 int
509 main(int argc, char *argv[]) {
510 int i;
511
512 progname = "dmenu";
513 dc = initdraw();
514
515 for(i = 1; i < argc; i++)
516 /* single flags */
517 if(!strcmp(argv[i], "-v")) {
518 fputs("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n", stdout);
519 exit(EXIT_SUCCESS);
520 }
521 else if(!strcmp(argv[i], "-b"))
522 topbar = False;
523 else if(!strcmp(argv[i], "-i")) {
524 fstrncmp = strncasecmp;
525 fstrstr = cistrstr;
526 }
527 else if(i == argc-1)
528 usage();
529 /* double flags */
530 else if(!strcmp(argv[i], "-l"))
531 lines = atoi(argv[++i]);
532 else if(!strcmp(argv[i], "-p"))
533 prompt = argv[++i];
534 else if(!strcmp(argv[i], "-fn"))
535 initfont(dc, argv[++i]);
536 else if(!strcmp(argv[i], "-nb"))
537 normbgcolor = argv[++i];
538 else if(!strcmp(argv[i], "-nf"))
539 normfgcolor = argv[++i];
540 else if(!strcmp(argv[i], "-sb"))
541 selbgcolor = argv[++i];
542 else if(!strcmp(argv[i], "-sf"))
543 selfgcolor = argv[++i];
544 else
545 usage();
546
547 readstdin();
548 setup();
549 run();
550
551 return EXIT_FAILURE; /* should not reach */
552 }