aboutsummaryrefslogtreecommitdiff
path: root/dmenu.c
blob: 895bdc503b18b9761ed86823178e9c8faececae7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
/* See LICENSE file for copyright and license details. */
#define _BSD_SOURCE
#include <ctype.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <unistd.h>
#include <X11/keysym.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#ifdef XINERAMA
#include <X11/extensions/Xinerama.h>
#endif

/* macros */
#define CLEANMASK(mask)         (mask & ~(numlockmask | LockMask))
#define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))

/* enums */
enum { ColFG, ColBG, ColLast };

/* typedefs */
typedef struct {
	int x, y, w, h;
	unsigned long norm[ColLast];
	unsigned long sel[ColLast];
	Drawable drawable;
	GC gc;
	struct {
		XFontStruct *xfont;
		XFontSet set;
		int ascent;
		int descent;
		int height;
	} font;
} DC; /* draw context */

typedef struct Item Item;
struct Item {
	char *text;
	Item *next;		/* traverses all items */
	Item *left, *right;	/* traverses items matching current search pattern */
};

/* forward declarations */
static void appenditem(Item *i, Item **list, Item **last);
static void calcoffsets(void);
static char *cistrstr(const char *s, const char *sub);
static void cleanup(void);
static void drawmenu(void);
static void drawtext(const char *text, unsigned long col[ColLast]);
static void eprint(const char *errstr, ...);
static unsigned long getcolor(const char *colstr);
static Bool grabkeyboard(void);
static void initfont(const char *fontstr);
static void kpress(XKeyEvent * e);
static void match(char *pattern);
static void readstdin(void);
static void run(void);
static void setup(Bool topbar);
static int textnw(const char *text, unsigned int len);
static int textw(const char *text);

#include "config.h"

/* variables */
static char *maxname = NULL;
static char *prompt = NULL;
static char text[4096];
static int cmdw = 0;
static int promptw = 0;
static int ret = 0;
static int screen;
static unsigned int mw, mh;
static unsigned int numlockmask = 0;
static Bool running = True;
static Display *dpy;
static DC dc = {0};
static Item *allitems = NULL;	/* first of all items */
static Item *item = NULL;	/* first of pattern matching items */
static Item *sel = NULL;
static Item *next = NULL;
static Item *prev = NULL;
static Item *curr = NULL;
static Window root, win;
static int (*fstrncmp)(const char *, const char *, size_t n) = strncmp;
static char *(*fstrstr)(const char *, const char *) = strstr;

void
appenditem(Item *i, Item **list, Item **last) {
	if(!(*last))
		*list = i;
	else
		(*last)->right = i;
	i->left = *last;
	i->right = NULL;
	*last = i;
}

void
calcoffsets(void) {
	int tw;
	unsigned int w;

	if(!curr)
		return;
	w = promptw + cmdw + 2 * spaceitem;
	for(next = curr; next; next=next->right) {
		tw = textw(next->text);
		if(tw > mw / 3)
			tw = mw / 3;
		w += tw;
		if(w > mw)
			break;
	}
	w = promptw + cmdw + 2 * spaceitem;
	for(prev = curr; prev && prev->left; prev=prev->left) {
		tw = textw(prev->left->text);
		if(tw > mw / 3)
			tw = mw / 3;
		w += tw;
		if(w > mw)
			break;
	}
}

char *
cistrstr(const char *s, const char *sub) {
	int c, csub;
	unsigned int len;

	if(!sub)
		return (char *)s;
	if((c = *sub++) != 0) {
		c = tolower(c);
		len = strlen(sub);
		do {
			do {
				if((csub = *s++) == 0)
					return (NULL);
			}
			while(tolower(csub) != c);
		}
		while(strncasecmp(s, sub, len) != 0);
		s--;
	}
	return (char *)s;
}

void
cleanup(void) {
	Item *itm;

	while(allitems) {
		itm = allitems->next;
		free(allitems->text);
		free(allitems);
		allitems = itm;
	}
	if(dc.font.set)
		XFreeFontSet(dpy, dc.font.set);
	else
		XFreeFont(dpy, dc.font.xfont);
	XFreePixmap(dpy, dc.drawable);
	XFreeGC(dpy, dc.gc);
	XDestroyWindow(dpy, win);
	XUngrabKeyboard(dpy, CurrentTime);
}

void
drawmenu(void) {
	Item *i;

	dc.x = 0;
	dc.y = 0;
	dc.w = mw;
	dc.h = mh;
	drawtext(NULL, dc.norm);
	/* print prompt? */
	if(promptw) {
		dc.w = promptw;
		drawtext(prompt, dc.sel);
	}
	dc.x += promptw;
	dc.w = mw - promptw;
	/* print command */
	if(cmdw && item)
		dc.w = cmdw;
	drawtext(text[0] ? text : NULL, dc.norm);
	dc.x += cmdw;
	if(curr) {
		dc.w = spaceitem;
		drawtext((curr && curr->left) ? "<" : NULL, dc.norm);
		dc.x += dc.w;
		/* determine maximum items */
		for(i = curr; i != next; i=i->right) {
			dc.w = textw(i->text);
			if(dc.w > mw / 3)
				dc.w = mw / 3;
			drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
			dc.x += dc.w;
		}
		dc.x = mw - spaceitem;
		dc.w = spaceitem;
		drawtext(next ? ">" : NULL, dc.norm);
	}
	XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
	XFlush(dpy);
}

void
drawtext(const char *text, unsigned long col[ColLast]) {
	int x, y, w, h;
	static char buf[256];
	unsigned int len, olen;
	XRectangle r = { dc.x, dc.y, dc.w, dc.h };

	XSetForeground(dpy, dc.gc, col[ColBG]);
	XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
	if(!text)
		return;
	w = 0;
	olen = len = strlen(text);
	if(len >= sizeof buf)
		len = sizeof buf - 1;
	memcpy(buf, text, len);
	buf[len] = 0;
	h = dc.font.ascent + dc.font.descent;
	y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
	x = dc.x + (h / 2);
	/* shorten text if necessary */
	while(len && (w = textnw(buf, len)) > dc.w - h)
		buf[--len] = 0;
	if(len < olen) {
		if(len > 1)
			buf[len - 1] = '.';
		if(len > 2)
			buf[len - 2] = '.';
		if(len > 3)
			buf[len - 3] = '.';
	}
	if(w > dc.w)
		return; /* too long */
	XSetForeground(dpy, dc.gc, col[ColFG]);
	if(dc.font.set)
		XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
	else
		XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
}

void
eprint(const char *errstr, ...) {
	va_list ap;

	va_start(ap, errstr);
	vfprintf(stderr, errstr, ap);
	va_end(ap);
	exit(EXIT_FAILURE);
}

unsigned long
getcolor(const char *colstr) {
	Colormap cmap = DefaultColormap(dpy, screen);
	XColor color;

	if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
		eprint("error, cannot allocate color '%s'\n", colstr);
	return color.pixel;
}

Bool
grabkeyboard(void) {
	unsigned int len;

	for(len = 1000; len; len--) {
		if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
		== GrabSuccess)
			break;
		usleep(1000);
	}
	return len > 0;
}

void
initfont(const char *fontstr) {
	char *def, **missing;
	int i, n;

	if(!fontstr || fontstr[0] == '\0')
		eprint("error, cannot load font: '%s'\n", fontstr);
	missing = NULL;
	if(dc.font.set)
		XFreeFontSet(dpy, dc.font.set);
	dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
	if(missing)
		XFreeStringList(missing);
	if(dc.font.set) {
		XFontSetExtents *font_extents;
		XFontStruct **xfonts;
		char **font_names;
		dc.font.ascent = dc.font.descent = 0;
		font_extents = XExtentsOfFontSet(dc.font.set);
		n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
		for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
			if(dc.font.ascent < (*xfonts)->ascent)
				dc.font.ascent = (*xfonts)->ascent;
			if(dc.font.descent < (*xfonts)->descent)
				dc.font.descent = (*xfonts)->descent;
			xfonts++;
		}
	}
	else {
		if(dc.font.xfont)
			XFreeFont(dpy, dc.font.xfont);
		dc.font.xfont = NULL;
		if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
		&& !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
			eprint("error, cannot load font: '%s'\n", fontstr);
		dc.font.ascent = dc.font.xfont->ascent;
		dc.font.descent = dc.font.xfont->descent;
	}
	dc.font.height = dc.font.ascent + dc.font.descent;
}

void
kpress(XKeyEvent * e) {
	char buf[32];
	int i, num;
	unsigned int len;
	KeySym ksym;

	len = strlen(text);
	buf[0] = 0;
	num = XLookupString(e, buf, sizeof buf, &ksym, 0);
	if(IsKeypadKey(ksym)) {
		if(ksym == XK_KP_Enter)
			ksym = XK_Return;
		else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
			ksym = (ksym - XK_KP_0) + XK_0;
	}
	if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
	   || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
	   || IsPrivateKeypadKey(ksym))
		return;
	/* first check if a control mask is omitted */
	if(e->state & ControlMask) {
		switch (ksym) {
		default:	/* ignore other control sequences */
			return;
		case XK_bracketleft:
			ksym = XK_Escape;
			break;
		case XK_h:
		case XK_H:
			ksym = XK_BackSpace;
			break;
		case XK_i:
		case XK_I:
			ksym = XK_Tab;
			break;
		case XK_j:
		case XK_J:
			ksym = XK_Return;
			break;
		case XK_u:
		case XK_U:
			text[0] = 0;
			match(text);
			drawmenu();
			return;
		case XK_w:
		case XK_W:
			if(len) {
				i = len - 1;
				while(i >= 0 && text[i] == ' ')
					text[i--] = 0;
				while(i >= 0 && text[i] != ' ')
					text[i--] = 0;
				match(text);
				drawmenu();
			}
			return;
		}
	}
	if(CLEANMASK(e->state) & Mod1Mask) {
		switch(ksym) {
		default: return;
		case XK_h:
			ksym = XK_Left;
			break;
		case XK_l:
			ksym = XK_Right;
			break;
		case XK_j:
			ksym = XK_Next;
			break;
		case XK_k:
			ksym = XK_Prior;
			break;
		case XK_g:
			ksym = XK_Home;
			break;
		case XK_G:
			ksym = XK_End;
			break;
		}
	}
	switch(ksym) {
	default:
		if(num && !iscntrl((int) buf[0])) {
			buf[num] = 0;
			if(len > 0)
				strncat(text, buf, sizeof text);
			else
				strncpy(text, buf, sizeof text);
			match(text);
		}
		break;
	case XK_BackSpace:
		if(len) {
			text[--len] = 0;
			match(text);
		}
		break;
	case XK_End:
		if(!item)
			return;
		while(next) {
			sel = curr = next;
			calcoffsets();
		}
		while(sel && sel->right)
			sel = sel->right;
		break;
	case XK_Escape:
		ret = 1;
		running = False;
		break;
	case XK_Home:
		if(!item)
			return;
		sel = curr = item;
		calcoffsets();
		break;
	case XK_Left:
		if(!(sel && sel->left))
			return;
		sel=sel->left;
		if(sel->right == curr) {
			curr = prev;
			calcoffsets();
		}
		break;
	case XK_Next:
		if(!next)
			return;
		sel = curr = next;
		calcoffsets();
		break;
	case XK_Prior:
		if(!prev)
			return;
		sel = curr = prev;
		calcoffsets();
		break;
	case XK_Return:
		if((e->state & ShiftMask) && *text)
			fprintf(stdout, "%s", text);
		else if(sel)
			fprintf(stdout, "%s", sel->text);
		else if(*text)
			fprintf(stdout, "%s", text);
		fflush(stdout);
		running = False;
		break;
	case XK_Right:
		if(!(sel && sel->right))
			return;
		sel=sel->right;
		if(sel == next) {
			curr = next;
			calcoffsets();
		}
		break;
	case XK_Tab:
		if(!sel)
			return;
		strncpy(text, sel->text, sizeof text);
		match(text);
		break;
	}
	drawmenu();
}

void
match(char *pattern) {
	unsigned int plen;
	Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;

	if(!pattern)
		return;
	plen = strlen(pattern);
	item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
	for(i = allitems; i; i = i->next)
		if(!fstrncmp(pattern, i->text, plen + 1))
			appenditem(i, &lexact, &exactend);
		else if(!fstrncmp(pattern, i->text, plen))
			appenditem(i, &lprefix, &prefixend);
		else if(fstrstr(i->text, pattern))
			appenditem(i, &lsubstr, &substrend);
	if(lexact) {
		item = lexact;
		itemend = exactend;
	}
	if(lprefix) {
		if(itemend) {
			itemend->right = lprefix;
			lprefix->left = itemend;
		}
		else
			item = lprefix;
		itemend = prefixend;
	}
	if(lsubstr) {
		if(itemend) {
			itemend->right = lsubstr;
			lsubstr->left = itemend;
		}
		else
			item = lsubstr;
	}
	curr = prev = next = sel = item;
	calcoffsets();
}

void
readstdin(void) {
	char *p, buf[1024];
	unsigned int len = 0, max = 0;
	Item *i, *new;

	i = 0;
	while(fgets(buf, sizeof buf, stdin)) {
		len = strlen(buf);
		if (buf[len - 1] == '\n')
			buf[len - 1] = 0;
		if(!(p = strdup(buf)))
			eprint("fatal: could not strdup() %u bytes\n", strlen(buf));
		if(max < len) {
			maxname = p;
			max = len;
		}
		if((new = (Item *)malloc(sizeof(Item))) == NULL)
			eprint("fatal: could not malloc() %u bytes\n", sizeof(Item));
		new->next = new->left = new->right = NULL;
		new->text = p;
		if(!i)
			allitems = new;
		else 
			i->next = new;
		i = new;
	}
}

void
run(void) {
	XEvent ev;

	/* main event loop */
	while(running && !XNextEvent(dpy, &ev))
		switch (ev.type) {
		default:	/* ignore all crap */
			break;
		case KeyPress:
			kpress(&ev.xkey);
			break;
		case Expose:
			if(ev.xexpose.count == 0)
				drawmenu();
			break;
		}
}

void
setup(Bool topbar) {
	int i, j, x, y;
#if XINERAMA
	int n;
	XineramaScreenInfo *info = NULL;
#endif
	XModifierKeymap *modmap;
	XSetWindowAttributes wa;

	/* init modifier map */
	modmap = XGetModifierMapping(dpy);
	for(i = 0; i < 8; i++)
		for(j = 0; j < modmap->max_keypermod; j++) {
			if(modmap->modifiermap[i * modmap->max_keypermod + j]
			== XKeysymToKeycode(dpy, XK_Num_Lock))
				numlockmask = (1 << i);
		}
	XFreeModifiermap(modmap);

	/* style */
	dc.norm[ColBG] = getcolor(normbgcolor);
	dc.norm[ColFG] = getcolor(normfgcolor);
	dc.sel[ColBG] = getcolor(selbgcolor);
	dc.sel[ColFG] = getcolor(selfgcolor);
	initfont(font);

	/* menu window */
	wa.override_redirect = 1;
	wa.background_pixmap = ParentRelative;
	wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask;

	/* menu window geometry */
	mh = dc.font.height + 2;
#if XINERAMA
	if(XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
		i = 0;
		if(n > 1) {
			int di;
			unsigned int dui;
			Window dummy;
			if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
				for(i = 0; i < n; i++)
					if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
						break;
		}
		x = info[i].x_org;
		y = topbar ? info[i].y_org : info[i].y_org + info[i].height - mh;
		mw = info[i].width;
		XFree(info);
	}
	else
#endif
	{
		x = 0;
		y = topbar ? 0 : DisplayHeight(dpy, screen) - mh;
		mw = DisplayWidth(dpy, screen);
	}

	win = XCreateWindow(dpy, root, x, y, mw, mh, 0,
			DefaultDepth(dpy, screen), CopyFromParent,
			DefaultVisual(dpy, screen),
			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);

	/* pixmap */
	dc.drawable = XCreatePixmap(dpy, root, mw, mh, DefaultDepth(dpy, screen));
	dc.gc = XCreateGC(dpy, root, 0, 0);
	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
	if(!dc.font.set)
		XSetFont(dpy, dc.gc, dc.font.xfont->fid);
	if(maxname)
		cmdw = textw(maxname);
	if(cmdw > mw / 3)
		cmdw = mw / 3;
	if(prompt)
		promptw = textw(prompt);
	if(promptw > mw / 5)
		promptw = mw / 5;
	text[0] = 0;
	match(text);
	XMapRaised(dpy, win);
}

int
textnw(const char *text, unsigned int len) {
	XRectangle r;

	if(dc.font.set) {
		XmbTextExtents(dc.font.set, text, len, NULL, &r);
		return r.width;
	}
	return XTextWidth(dc.font.xfont, text, len);
}

int
textw(const char *text) {
	return textnw(text, strlen(text)) + dc.font.height;
}

int
main(int argc, char *argv[]) {
	unsigned int i;
	Bool topbar = True;

	/* command line args */
	for(i = 1; i < argc; i++)
		if(!strcmp(argv[i], "-i")) {
			fstrncmp = strncasecmp;
			fstrstr = cistrstr;
		}
		else if(!strcmp(argv[i], "-b"))
			topbar = False;
		else if(!strcmp(argv[i], "-fn")) {
			if(++i < argc) font = argv[i];
		}
		else if(!strcmp(argv[i], "-nb")) {
			if(++i < argc) normbgcolor = argv[i];
		}
		else if(!strcmp(argv[i], "-nf")) {
			if(++i < argc) normfgcolor = argv[i];
		}
		else if(!strcmp(argv[i], "-p")) {
			if(++i < argc) prompt = argv[i];
		}
		else if(!strcmp(argv[i], "-sb")) {
			if(++i < argc) selbgcolor = argv[i];
		}
		else if(!strcmp(argv[i], "-sf")) {
			if(++i < argc) selfgcolor = argv[i];
		}
		else if(!strcmp(argv[i], "-v"))
			eprint("dmenu-"VERSION", © 2006-2008 dmenu engineers, see LICENSE for details\n");
		else
			eprint("usage: dmenu [-i] [-b] [-fn <font>] [-nb <color>] [-nf <color>]\n"
			       "             [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
	if(!XSupportsLocale())
		fprintf(stderr, "warning: no locale support\n");
	if(!(dpy = XOpenDisplay(0)))
		eprint("dmenu: cannot open display\n");
	screen = DefaultScreen(dpy);
	root = RootWindow(dpy, screen);

	if(isatty(STDIN_FILENO)) {
		readstdin();
		running = grabkeyboard();
	}
	else { /* prevent keypress loss */
		running = grabkeyboard();
		readstdin();
	}

	setup(topbar);
	drawmenu();
	XSync(dpy, False);
	run();
	cleanup();
	XCloseDisplay(dpy);
	return ret;
}