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