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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 area */
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_e:
198 ksym = XK_End;
199 break;
200 case XK_f:
201 ksym = XK_Right;
202 break;
203 case XK_h:
204 ksym = XK_BackSpace;
205 break;
206 case XK_i:
207 ksym = XK_Tab;
208 break;
209 case XK_j:
210 case XK_m:
211 ksym = XK_Return;
212 break;
213 case XK_k: /* delete right */
214 text[cursor] = '\0';
215 match();
216 break;
217 case XK_n:
218 ksym = XK_Down;
219 break;
220 case XK_p:
221 ksym = XK_Up;
222 break;
223 case XK_u: /* delete left */
224 insert(NULL, -cursor);
225 break;
226 case XK_w: /* delete word */
227 if(cursor == 0)
228 return;
229 n = 0;
230 while(cursor - n++ > 0 && text[cursor - n] == ' ');
231 while(cursor - n++ > 0 && text[cursor - n] != ' ');
232 insert(NULL, 1-n);
233 break;
234 case XK_y: /* paste selection */
235 XConvertSelection(dc->dpy, XA_PRIMARY, utf8, None, win, CurrentTime);
236 /* causes SelectionNotify event */
237 return;
238 }
239 }
240 switch(ksym) {
241 default:
242 if(!iscntrl((int)*buf))
243 insert(buf, MIN(strlen(buf), sizeof text - cursor));
244 break;
245 case XK_BackSpace:
246 if(cursor == 0)
247 return;
248 for(n = 1; cursor - n > 0 && !UTF8_CODEPOINT(text[cursor - n]); n++);
249 insert(NULL, -n);
250 break;
251 case XK_Delete:
252 if(cursor == len)
253 return;
254 for(n = 1; cursor + n < len && !UTF8_CODEPOINT(text[cursor + n]); n++);
255 cursor += n;
256 insert(NULL, -n);
257 break;
258 case XK_End:
259 if(cursor < len) {
260 cursor = len;
261 break;
262 }
263 while(next) {
264 sel = curr = next;
265 calcoffsets();
266 }
267 while(sel && sel->right)
268 sel = sel->right;
269 break;
270 case XK_Escape:
271 exit(EXIT_FAILURE);
272 case XK_Home:
273 if(sel == matches) {
274 cursor = 0;
275 break;
276 }
277 sel = curr = matches;
278 calcoffsets();
279 break;
280 case XK_Left:
281 if(cursor > 0 && (!sel || !sel->left || lines > 0)) {
282 while(cursor-- > 0 && !UTF8_CODEPOINT(text[cursor]));
283 break;
284 }
285 else if(lines > 0)
286 return;
287 case XK_Up:
288 if(!sel || !sel->left)
289 return;
290 sel = sel->left;
291 if(sel->right == curr) {
292 curr = prev;
293 calcoffsets();
294 }
295 break;
296 case XK_Next:
297 if(!next)
298 return;
299 sel = curr = next;
300 calcoffsets();
301 break;
302 case XK_Prior:
303 if(!prev)
304 return;
305 sel = curr = prev;
306 calcoffsets();
307 break;
308 case XK_Return:
309 case XK_KP_Enter:
310 fputs((sel && !(e->state & ShiftMask)) ? sel->text : text, stdout);
311 fflush(stdout);
312 exit(EXIT_SUCCESS);
313 case XK_Right:
314 if(cursor < len) {
315 while(cursor++ < len && !UTF8_CODEPOINT(text[cursor]));
316 break;
317 }
318 else if(lines > 0)
319 return;
320 case XK_Down:
321 if(!sel || !sel->right)
322 return;
323 sel = sel->right;
324 if(sel == next) {
325 curr = next;
326 calcoffsets();
327 }
328 break;
329 case XK_Tab:
330 if(!sel)
331 return;
332 strncpy(text, sel->text, sizeof text);
333 cursor = strlen(text);
334 match();
335 break;
336 }
337 drawmenu();
338 }
339
340 void
341 match(void) {
342 unsigned int len;
343 Item *item, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
344
345 len = strlen(text);
346 matches = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
347 for(item = allitems; item; item = item->next)
348 if(!fstrncmp(text, item->text, len + 1))
349 appenditem(item, &lexact, &exactend);
350 else if(!fstrncmp(text, item->text, len))
351 appenditem(item, &lprefix, &prefixend);
352 else if(fstrstr(item->text, text))
353 appenditem(item, &lsubstr, &substrend);
354 if(lexact) {
355 matches = lexact;
356 itemend = exactend;
357 }
358 if(lprefix) {
359 if(itemend) {
360 itemend->right = lprefix;
361 lprefix->left = itemend;
362 }
363 else
364 matches = lprefix;
365 itemend = prefixend;
366 }
367 if(lsubstr) {
368 if(itemend) {
369 itemend->right = lsubstr;
370 lsubstr->left = itemend;
371 }
372 else
373 matches = lsubstr;
374 }
375 curr = prev = next = sel = matches;
376 calcoffsets();
377 }
378
379 void
380 paste(void) {
381 char *p, *q;
382 int di;
383 unsigned long dl;
384 Atom da;
385
386 XGetWindowProperty(dc->dpy, win, utf8, 0, sizeof text - cursor, True,
387 utf8, &da, &di, &dl, &dl, (unsigned char **)&p);
388 insert(p, (q = strchr(p, '\n')) ? q-p : strlen(p));
389 XFree(p);
390 drawmenu();
391 }
392
393 void
394 readstdin(void) {
395 char buf[sizeof text], *p;
396 Item *item, *new;
397
398 allitems = NULL;
399 for(item = NULL; fgets(buf, sizeof buf, stdin); item = new) {
400 if((p = strchr(buf, '\n')))
401 *p = '\0';
402 if(!(new = malloc(sizeof *new)))
403 eprintf("cannot malloc %u bytes\n", sizeof *new);
404 if(!(new->text = strdup(buf)))
405 eprintf("cannot strdup %u bytes\n", strlen(buf));
406 inputw = MAX(inputw, textw(dc, new->text));
407 new->next = new->left = new->right = NULL;
408 if(item)
409 item->next = new;
410 else
411 allitems = new;
412 }
413 }
414
415 void
416 run(void) {
417 XEvent ev;
418
419 while(!XNextEvent(dc->dpy, &ev))
420 switch(ev.type) {
421 case Expose:
422 if(ev.xexpose.count == 0)
423 drawmenu();
424 break;
425 case KeyPress:
426 keypress(&ev.xkey);
427 break;
428 case SelectionNotify:
429 if(ev.xselection.property == utf8)
430 paste();
431 break;
432 case VisibilityNotify:
433 if(ev.xvisibility.state != VisibilityUnobscured)
434 XRaiseWindow(dc->dpy, win);
435 break;
436 }
437 }
438
439 void
440 setup(void) {
441 int x, y, screen;
442 XSetWindowAttributes wa;
443 #ifdef XINERAMA
444 int n;
445 XineramaScreenInfo *info;
446 #endif
447
448 screen = DefaultScreen(dc->dpy);
449 root = RootWindow(dc->dpy, screen);
450 utf8 = XInternAtom(dc->dpy, "UTF8_STRING", False);
451
452 normcol[ColBG] = getcolor(dc, normbgcolor);
453 normcol[ColFG] = getcolor(dc, normfgcolor);
454 selcol[ColBG] = getcolor(dc, selbgcolor);
455 selcol[ColFG] = getcolor(dc, selfgcolor);
456
457 /* input window geometry */
458 mh = (dc->font.height + 2) * (lines + 1);
459 #ifdef XINERAMA
460 if((info = XineramaQueryScreens(dc->dpy, &n))) {
461 int i, di;
462 unsigned int du;
463 Window dw;
464
465 XQueryPointer(dc->dpy, root, &dw, &dw, &x, &y, &di, &di, &du);
466 for(i = 0; i < n; i++)
467 if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
468 break;
469 x = info[i].x_org;
470 y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
471 mw = info[i].width;
472 XFree(info);
473 }
474 else
475 #endif
476 {
477 x = 0;
478 y = topbar ? 0 : DisplayHeight(dc->dpy, screen) - mh;
479 mw = DisplayWidth(dc->dpy, screen);
480 }
481 /* input window */
482 wa.override_redirect = True;
483 wa.background_pixmap = ParentRelative;
484 wa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
485 win = XCreateWindow(dc->dpy, root, x, y, mw, mh, 0,
486 DefaultDepth(dc->dpy, screen), CopyFromParent,
487 DefaultVisual(dc->dpy, screen),
488 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
489
490 grabkeyboard();
491 setcanvas(dc, win, mw, mh);
492 inputw = MIN(inputw, mw/3);
493 promptw = prompt ? MIN(textw(dc, prompt), mw/5) : 0;
494 XMapRaised(dc->dpy, win);
495 text[0] = '\0';
496 match();
497 }
498
499 void
500 usage(void) {
501 fputs("usage: dmenu [-b] [-i] [-l lines] [-p prompt] [-fn font] [-nb color]\n"
502 " [-nf color] [-sb color] [-sf color] [-v]\n", stderr);
503 exit(EXIT_FAILURE);
504 }
505
506 int
507 main(int argc, char *argv[]) {
508 int i;
509
510 progname = "dmenu";
511 dc = initdraw();
512
513 for(i = 1; i < argc; i++)
514 /* single flags */
515 if(!strcmp(argv[i], "-v")) {
516 fputs("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n", stdout);
517 exit(EXIT_SUCCESS);
518 }
519 else if(!strcmp(argv[i], "-b"))
520 topbar = False;
521 else if(!strcmp(argv[i], "-i")) {
522 fstrncmp = strncasecmp;
523 fstrstr = cistrstr;
524 }
525 else if(i == argc-1)
526 usage();
527 /* double flags */
528 else if(!strcmp(argv[i], "-l"))
529 lines = atoi(argv[++i]);
530 else if(!strcmp(argv[i], "-p"))
531 prompt = argv[++i];
532 else if(!strcmp(argv[i], "-fn"))
533 initfont(dc, argv[++i]);
534 else if(!strcmp(argv[i], "-nb"))
535 normbgcolor = argv[++i];
536 else if(!strcmp(argv[i], "-nf"))
537 normfgcolor = argv[++i];
538 else if(!strcmp(argv[i], "-sb"))
539 selbgcolor = argv[++i];
540 else if(!strcmp(argv[i], "-sf"))
541 selfgcolor = argv[++i];
542 else
543 usage();
544
545 readstdin();
546 setup();
547 run();
548
549 return EXIT_FAILURE; /* should not reach */
550 }