Xinqi Bao's Git

projects / dmenu.git / blob


54a3a12ca91adff4f06e8d633478283a0e314cec
[dmenu.git] / main.c
1 /* (C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
2 * (C)opyright MMVI-MMVII Sander van Dijk <a dot h dot vandijk at gmail dot com>
3 * See LICENSE file for license details.
4 */
5 #include "dmenu.h"
6
7 #include <ctype.h>
8 #include <locale.h>
9 #include <stdlib.h>
10 #include <stdio.h>
11 #include <string.h>
12 #include <unistd.h>
13 #include <X11/Xutil.h>
14 #include <X11/keysym.h>
15
16 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
17
18 typedef struct Item Item;
19 struct Item {
20 Item *next; /* traverses all items */
21 Item *left, *right; /* traverses items matching current search pattern */
22 char *text;
23 };
24
25 /* static */
26
27 static char text[4096];
28 static char *prompt = NULL;
29 static int mw, mh;
30 static int ret = 0;
31 static int nitem = 0;
32 static unsigned int cmdw = 0;
33 static unsigned int promptw = 0;
34 static unsigned int numlockmask = 0;
35 static Bool running = True;
36 static Item *allitems = NULL; /* first of all items */
37 static Item *item = NULL; /* first of pattern matching items */
38 static Item *sel = NULL;
39 static Item *next = NULL;
40 static Item *prev = NULL;
41 static Item *curr = NULL;
42 static Window root;
43 static Window win;
44
45 static unsigned int
46 textnw(const char *text, unsigned int len) {
47 XRectangle r;
48
49 if(dc.font.set) {
50 XmbTextExtents(dc.font.set, text, len, NULL, &r);
51 return r.width;
52 }
53 return XTextWidth(dc.font.xfont, text, len);
54 }
55
56 static unsigned int
57 textw(const char *text) {
58 return textnw(text, strlen(text)) + dc.font.height;
59 }
60
61 static void
62 calcoffsets(void) {
63 unsigned int tw, w;
64
65 if(!curr)
66 return;
67 w = promptw + cmdw + 2 * SPACE;
68 for(next = curr; next; next=next->right) {
69 tw = textw(next->text);
70 if(tw > mw / 3)
71 tw = mw / 3;
72 w += tw;
73 if(w > mw)
74 break;
75 }
76 w = promptw + cmdw + 2 * SPACE;
77 for(prev = curr; prev && prev->left; prev=prev->left) {
78 tw = textw(prev->left->text);
79 if(tw > mw / 3)
80 tw = mw / 3;
81 w += tw;
82 if(w > mw)
83 break;
84 }
85 }
86
87 static void
88 drawtext(const char *text, unsigned long col[ColLast]) {
89 int x, y, w, h;
90 static char buf[256];
91 unsigned int len, olen;
92 XGCValues gcv;
93 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
94
95 XSetForeground(dpy, dc.gc, col[ColBG]);
96 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
97 if(!text)
98 return;
99 w = 0;
100 olen = len = strlen(text);
101 if(len >= sizeof buf)
102 len = sizeof buf - 1;
103 memcpy(buf, text, len);
104 buf[len] = 0;
105 h = dc.font.ascent + dc.font.descent;
106 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
107 x = dc.x + (h / 2);
108 /* shorten text if necessary */
109 while(len && (w = textnw(buf, len)) > dc.w - h)
110 buf[--len] = 0;
111 if(len < olen) {
112 if(len > 1)
113 buf[len - 1] = '.';
114 if(len > 2)
115 buf[len - 2] = '.';
116 if(len > 3)
117 buf[len - 3] = '.';
118 }
119 if(w > dc.w)
120 return; /* too long */
121 gcv.foreground = col[ColFG];
122 if(dc.font.set) {
123 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
124 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc,
125 x, y, buf, len);
126 }
127 else {
128 gcv.font = dc.font.xfont->fid;
129 XChangeGC(dpy, dc.gc, GCForeground | GCFont, &gcv);
130 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
131 }
132 }
133
134 static void
135 drawmenu(void) {
136 Item *i;
137
138 dc.x = 0;
139 dc.y = 0;
140 dc.w = mw;
141 dc.h = mh;
142 drawtext(NULL, dc.norm);
143 /* print prompt? */
144 if(promptw) {
145 dc.w = promptw;
146 drawtext(prompt, dc.sel);
147 }
148 dc.x += promptw;
149 dc.w = mw - promptw;
150 /* print command */
151 if(cmdw && item)
152 dc.w = cmdw;
153 drawtext(text[0] ? text : NULL, dc.norm);
154 dc.x += cmdw;
155 if(curr) {
156 dc.w = SPACE;
157 drawtext((curr && curr->left) ? "<" : NULL, dc.norm);
158 dc.x += dc.w;
159 /* determine maximum items */
160 for(i = curr; i != next; i=i->right) {
161 dc.w = textw(i->text);
162 if(dc.w > mw / 3)
163 dc.w = mw / 3;
164 drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
165 dc.x += dc.w;
166 }
167 dc.x = mw - SPACE;
168 dc.w = SPACE;
169 drawtext(next ? ">" : NULL, dc.norm);
170 }
171 XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
172 XFlush(dpy);
173 }
174
175 static unsigned long
176 getcolor(const char *colstr) {
177 Colormap cmap = DefaultColormap(dpy, screen);
178 XColor color;
179
180 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
181 eprint("error, cannot allocate color '%s'\n", colstr);
182 return color.pixel;
183 }
184
185 static void
186 setfont(const char *fontstr) {
187 char *def, **missing;
188 int i, n;
189
190 missing = NULL;
191 if(dc.font.set)
192 XFreeFontSet(dpy, dc.font.set);
193 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
194 if(missing)
195 XFreeStringList(missing);
196 if(dc.font.set) {
197 XFontSetExtents *font_extents;
198 XFontStruct **xfonts;
199 char **font_names;
200 dc.font.ascent = dc.font.descent = 0;
201 font_extents = XExtentsOfFontSet(dc.font.set);
202 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
203 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
204 if(dc.font.ascent < (*xfonts)->ascent)
205 dc.font.ascent = (*xfonts)->ascent;
206 if(dc.font.descent < (*xfonts)->descent)
207 dc.font.descent = (*xfonts)->descent;
208 xfonts++;
209 }
210 }
211 else {
212 if(dc.font.xfont)
213 XFreeFont(dpy, dc.font.xfont);
214 dc.font.xfont = NULL;
215 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr)))
216 eprint("error, cannot load font: '%s'\n", fontstr);
217 dc.font.ascent = dc.font.xfont->ascent;
218 dc.font.descent = dc.font.xfont->descent;
219 }
220 dc.font.height = dc.font.ascent + dc.font.descent;
221 }
222
223 static void
224 match(char *pattern) {
225 unsigned int plen;
226 Item *i, *j;
227
228 if(!pattern)
229 return;
230 plen = strlen(pattern);
231 item = j = NULL;
232 nitem = 0;
233 for(i = allitems; i; i=i->next)
234 if(!plen || !strncmp(pattern, i->text, plen)) {
235 if(!j)
236 item = i;
237 else
238 j->right = i;
239 i->left = j;
240 i->right = NULL;
241 j = i;
242 nitem++;
243 }
244 for(i = allitems; i; i=i->next)
245 if(plen && strncmp(pattern, i->text, plen)
246 && strstr(i->text, pattern)) {
247 if(!j)
248 item = i;
249 else
250 j->right = i;
251 i->left = j;
252 i->right = NULL;
253 j = i;
254 nitem++;
255 }
256 curr = prev = next = sel = item;
257 calcoffsets();
258 }
259
260 static void
261 kpress(XKeyEvent * e) {
262 char buf[32];
263 int i, num, prev_nitem;
264 unsigned int len;
265 KeySym ksym;
266
267 len = strlen(text);
268 buf[0] = 0;
269 num = XLookupString(e, buf, sizeof buf, &ksym, 0);
270 if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
271 || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
272 || IsPrivateKeypadKey(ksym))
273 return;
274 /* first check if a control mask is omitted */
275 if(e->state & ControlMask) {
276 switch (ksym) {
277 default: /* ignore other control sequences */
278 return;
279 case XK_bracketleft:
280 ksym = XK_Escape;
281 break;
282 case XK_h:
283 case XK_H:
284 ksym = XK_BackSpace;
285 break;
286 case XK_i:
287 case XK_I:
288 ksym = XK_Tab;
289 break;
290 case XK_j:
291 case XK_J:
292 ksym = XK_Return;
293 break;
294 case XK_u:
295 case XK_U:
296 text[0] = 0;
297 match(text);
298 drawmenu();
299 return;
300 case XK_w:
301 case XK_W:
302 if(len) {
303 i = len - 1;
304 while(i >= 0 && text[i] == ' ')
305 text[i--] = 0;
306 while(i >= 0 && text[i] != ' ')
307 text[i--] = 0;
308 match(text);
309 drawmenu();
310 }
311 return;
312 }
313 }
314 if(CLEANMASK(e->state) & Mod1Mask) {
315 switch(ksym) {
316 default: return;
317 case XK_h:
318 ksym = XK_Left;
319 break;
320 case XK_l:
321 ksym = XK_Right;
322 break;
323 case XK_j:
324 ksym = XK_Next;
325 break;
326 case XK_k:
327 ksym = XK_Prior;
328 break;
329 case XK_g:
330 ksym = XK_Home;
331 break;
332 case XK_G:
333 ksym = XK_End;
334 break;
335 }
336 }
337 switch(ksym) {
338 default:
339 if(num && !iscntrl((int) buf[0])) {
340 buf[num] = 0;
341 if(len > 0)
342 strncat(text, buf, sizeof text);
343 else
344 strncpy(text, buf, sizeof text);
345 match(text);
346 }
347 break;
348 case XK_BackSpace:
349 if((i = len)) {
350 prev_nitem = nitem;
351 do {
352 text[--i] = 0;
353 match(text);
354 } while(i && nitem && prev_nitem == nitem);
355 match(text);
356 }
357 break;
358 case XK_End:
359 if(!item)
360 return;
361 while(next) {
362 sel = curr = next;
363 calcoffsets();
364 }
365 while(sel && sel->right)
366 sel = sel->right;
367 break;
368 case XK_Escape:
369 ret = 1;
370 running = False;
371 break;
372 case XK_Home:
373 if(!item)
374 return;
375 sel = curr = item;
376 calcoffsets();
377 break;
378 case XK_Left:
379 if(!(sel && sel->left))
380 return;
381 sel=sel->left;
382 if(sel->right == curr) {
383 curr = prev;
384 calcoffsets();
385 }
386 break;
387 case XK_Next:
388 if(!next)
389 return;
390 sel = curr = next;
391 calcoffsets();
392 break;
393 case XK_Prior:
394 if(!prev)
395 return;
396 sel = curr = prev;
397 calcoffsets();
398 break;
399 case XK_Return:
400 if((e->state & ShiftMask) && text)
401 fprintf(stdout, "%s", text);
402 else if(sel)
403 fprintf(stdout, "%s", sel->text);
404 else if(text)
405 fprintf(stdout, "%s", text);
406 fflush(stdout);
407 running = False;
408 break;
409 case XK_Right:
410 if(!(sel && sel->right))
411 return;
412 sel=sel->right;
413 if(sel == next) {
414 curr = next;
415 calcoffsets();
416 }
417 break;
418 case XK_Tab:
419 if(!sel)
420 return;
421 strncpy(text, sel->text, sizeof text);
422 match(text);
423 break;
424 }
425 drawmenu();
426 }
427
428 static char *
429 readstdin(void) {
430 static char *maxname = NULL;
431 char *p, buf[1024];
432 unsigned int len = 0, max = 0;
433 Item *i, *new;
434
435 i = 0;
436 while(fgets(buf, sizeof buf, stdin)) {
437 len = strlen(buf);
438 if (buf[len - 1] == '\n')
439 buf[len - 1] = 0;
440 p = estrdup(buf);
441 if(max < len) {
442 maxname = p;
443 max = len;
444 }
445 new = emalloc(sizeof(Item));
446 new->next = new->left = new->right = NULL;
447 new->text = p;
448 if(!i)
449 allitems = new;
450 else
451 i->next = new;
452 i = new;
453 }
454
455 return maxname;
456 }
457
458 static void
459 usage(void) {
460 eprint("usage: dmenu [-b] [-fn <font>] [-nb <color>] [-nf <color>]\n"
461 " [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
462 }
463
464 /* extern */
465
466 int screen;
467 Display *dpy;
468 DC dc = {0};
469
470 int
471 main(int argc, char *argv[]) {
472 Bool bottom = False;
473 char *font = FONT;
474 char *maxname;
475 char *normbg = NORMBGCOLOR;
476 char *normfg = NORMFGCOLOR;
477 char *selbg = SELBGCOLOR;
478 char *selfg = SELFGCOLOR;
479 int i, j;
480 Item *itm;
481 XEvent ev;
482 XModifierKeymap *modmap;
483 XSetWindowAttributes wa;
484
485 if(isatty(STDIN_FILENO)) {
486 fputs("error: dmenu can't run in an interactive shell\n", stdout);
487 usage();
488 }
489 /* command line args */
490 for(i = 1; i < argc; i++)
491 if(!strncmp(argv[i], "-b", 3)) {
492 bottom = True;
493 }
494 else if(!strncmp(argv[i], "-fn", 4)) {
495 if(++i < argc) font = argv[i];
496 }
497 else if(!strncmp(argv[i], "-nb", 4)) {
498 if(++i < argc) normbg = argv[i];
499 }
500 else if(!strncmp(argv[i], "-nf", 4)) {
501 if(++i < argc) normfg = argv[i];
502 }
503 else if(!strncmp(argv[i], "-p", 3)) {
504 if(++i < argc) prompt = argv[i];
505 }
506 else if(!strncmp(argv[i], "-sb", 4)) {
507 if(++i < argc) selbg = argv[i];
508 }
509 else if(!strncmp(argv[i], "-sf", 4)) {
510 if(++i < argc) selfg = argv[i];
511 }
512 else if(!strncmp(argv[i], "-v", 3))
513 eprint("dmenu-"VERSION", (C)opyright MMVI-MMVII Anselm R. Garbe\n");
514 else
515 usage();
516 setlocale(LC_CTYPE, "");
517 dpy = XOpenDisplay(0);
518 if(!dpy)
519 eprint("dmenu: cannot open display\n");
520 screen = DefaultScreen(dpy);
521 root = RootWindow(dpy, screen);
522 while(XGrabKeyboard(dpy, root, True, GrabModeAsync,
523 GrabModeAsync, CurrentTime) != GrabSuccess)
524 usleep(1000);
525 maxname = readstdin();
526 /* init modifier map */
527 modmap = XGetModifierMapping(dpy);
528 for (i = 0; i < 8; i++) {
529 for (j = 0; j < modmap->max_keypermod; j++) {
530 if(modmap->modifiermap[i * modmap->max_keypermod + j]
531 == XKeysymToKeycode(dpy, XK_Num_Lock))
532 numlockmask = (1 << i);
533 }
534 }
535 XFreeModifiermap(modmap);
536 /* style */
537 dc.norm[ColBG] = getcolor(normbg);
538 dc.norm[ColFG] = getcolor(normfg);
539 dc.sel[ColBG] = getcolor(selbg);
540 dc.sel[ColFG] = getcolor(selfg);
541 setfont(font);
542 /* menu window */
543 wa.override_redirect = 1;
544 wa.background_pixmap = ParentRelative;
545 wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask;
546 mw = DisplayWidth(dpy, screen);
547 mh = dc.font.height + 2;
548 win = XCreateWindow(dpy, root, 0,
549 bottom ? DisplayHeight(dpy, screen) - mh : 0, mw, mh, 0,
550 DefaultDepth(dpy, screen), CopyFromParent,
551 DefaultVisual(dpy, screen),
552 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
553 /* pixmap */
554 dc.drawable = XCreatePixmap(dpy, root, mw, mh, DefaultDepth(dpy, screen));
555 dc.gc = XCreateGC(dpy, root, 0, 0);
556 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
557 if(maxname)
558 cmdw = textw(maxname);
559 if(cmdw > mw / 3)
560 cmdw = mw / 3;
561 if(prompt)
562 promptw = textw(prompt);
563 if(promptw > mw / 5)
564 promptw = mw / 5;
565 text[0] = 0;
566 match(text);
567 XMapRaised(dpy, win);
568 drawmenu();
569 XSync(dpy, False);
570
571 /* main event loop */
572 while(running && !XNextEvent(dpy, &ev))
573 switch (ev.type) {
574 default: /* ignore all crap */
575 break;
576 case KeyPress:
577 kpress(&ev.xkey);
578 break;
579 case Expose:
580 if(ev.xexpose.count == 0)
581 drawmenu();
582 break;
583 }
584
585 /* cleanup */
586 while(allitems) {
587 itm = allitems->next;
588 free(allitems->text);
589 free(allitems);
590 allitems = itm;
591 }
592 if(dc.font.set)
593 XFreeFontSet(dpy, dc.font.set);
594 else
595 XFreeFont(dpy, dc.font.xfont);
596 XFreePixmap(dpy, dc.drawable);
597 XFreeGC(dpy, dc.gc);
598 XDestroyWindow(dpy, win);
599 XUngrabKeyboard(dpy, CurrentTime);
600 XCloseDisplay(dpy);
601 return ret;
602 }