git.stevedylan.dev

add lots of comments 7b1493a6

Connor Lane Smith · 2011-10-26 13:20 1 file(s) · +33 −18

dmenu.c +33 −18

	int i;

	for(i = 1; i < argc; i++)
		/* single flags */
		if(!strcmp(argv[i], "-v")) {
		/* these options take no arguments */
		if(!strcmp(argv[i], "-v")) {      /* prints version information */
			puts("dmenu-"VERSION", © 2006-2011 dmenu engineers, see LICENSE for details");
			exit(EXIT_SUCCESS);
		}
		else if(!strcmp(argv[i], "-b"))
		else if(!strcmp(argv[i], "-b"))   /* appears at the bottom of the screen */
			topbar = False;
		else if(!strcmp(argv[i], "-f"))
		else if(!strcmp(argv[i], "-f"))   /* grabs keyboard before reading stdin */
			fast = True;
		else if(!strcmp(argv[i], "-i")) {
		else if(!strcmp(argv[i], "-i")) { /* case-insensitive item matching */
			fstrncmp = strncasecmp;
			fstrstr = cistrstr;
		}
		else if(i+1 == argc)
			usage();
		/* double flags */
		else if(!strcmp(argv[i], "-l"))
		/* these options take one argument */
		else if(!strcmp(argv[i], "-l"))   /* number of lines in vertical list */
			lines = atoi(argv[++i]);
		else if(!strcmp(argv[i], "-p"))
		else if(!strcmp(argv[i], "-p"))   /* adds prompt to left of input field */
			prompt = argv[++i];
		else if(!strcmp(argv[i], "-fn"))
		else if(!strcmp(argv[i], "-fn"))  /* font or font set */
			font = argv[++i];
		else if(!strcmp(argv[i], "-nb"))
		else if(!strcmp(argv[i], "-nb"))  /* normal background color */
			normbgcolor = argv[++i];
		else if(!strcmp(argv[i], "-nf"))
		else if(!strcmp(argv[i], "-nf"))  /* normal foreground color */
			normfgcolor = argv[++i];
		else if(!strcmp(argv[i], "-sb"))
		else if(!strcmp(argv[i], "-sb"))  /* selected background color */
			selbgcolor = argv[++i];
		else if(!strcmp(argv[i], "-sf"))
		else if(!strcmp(argv[i], "-sf"))  /* selected foreground color */
			selfgcolor = argv[++i];
		else
			usage();

		n = lines * bh;
	else
		n = mw - (promptw + inputw + textw(dc, "<") + textw(dc, ">"));

	/* calculate which items will begin the next page and previous page */
	for(i = 0, next = curr; next; next = next->right)
		if((i += (lines > 0) ? bh : MIN(textw(dc, next->text), n)) > n)
			break;

		drawtext(dc, prompt, selcol);
		dc->x = dc->w;
	}
	/* draw input field */
	dc->w = (lines > 0 || !matches) ? mw - dc->x : inputw;
	drawtext(dc, text, normcol);
	if((curpos = textnw(dc, text, cursor) + dc->h/2 - 2) < dc->w)
		drawrect(dc, curpos, 2, 1, dc->h - 4, True, FG(dc, normcol));

	if(lines > 0) {
		/* draw vertical list */
		dc->w = mw - dc->x;
		for(item = curr; item != next; item = item->right) {
			dc->y += dc->h;

		}
	}
	else if(matches) {
		/* draw horizontal list */
		dc->x += inputw;
		dc->w = textw(dc, "<");
		if(curr->left)

grabkeyboard(void) {
	int i;

	/* try to grab keyboard, we may have to wait for another process to ungrab */
	for(i = 0; i < 1000; i++) {
		if(XGrabKeyboard(dc->dpy, DefaultRootWindow(dc->dpy), True,
		                 GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess)

insert(const char *str, ssize_t n) {
	if(strlen(text) + n > sizeof text - 1)
		return;
	/* move existing text out of the way, insert new text, and update cursor */
	memmove(&text[cursor + n], &text[cursor], sizeof text - cursor - MAX(n, 0));
	if(n > 0)
		memcpy(&text[cursor], str, n);

			break;
		}
		if(next) {
			/* jump to end of list and position items in reverse */
			curr = matchend;
			calcoffsets();
			curr = prev;

	Item *item, *lprefix, *lsubstr, *prefixend, *substrend;

	strcpy(buf, text);
	/* separate input text into tokens to be matched individually */
	for(s = strtok(buf, " "); s; tokv[tokc-1] = s, s = strtok(NULL, " "))
		if(++tokc > tokn && !(tokv = realloc(tokv, ++tokn * sizeof *tokv)))
			eprintf("cannot realloc %u bytes\n", tokn * sizeof *tokv);

		for(i = 0; i < tokc; i++)
			if(!fstrstr(item->text, tokv[i]))
				break;
		if(i != tokc)
		if(i != tokc) /* not all tokens match */
			continue;
		/* exact matches go first, then prefixes, then substrings */
		if(!tokc || !fstrncmp(tokv[0], item->text, len+1))
			appenditem(item, &matches, &matchend);
		else if(!fstrncmp(tokv[0], item->text, len))

nextrune(int inc) {
	ssize_t n;

	/* return location of next utf8 rune in the given direction (+1 or -1) */
	for(n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc);
	return n;
}

	unsigned long dl;
	Atom da;

	/* we have been given the current selection, now insert it into input */
	XGetWindowProperty(dc->dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
	                   utf8, &da, &di, &dl, &dl, (unsigned char **)&p);
	insert(p, (q = strchr(p, '\n')) ? q-p : (ssize_t)strlen(p));

	char buf[sizeof text], *p, *maxstr = NULL;
	size_t i, max = 0, size = 0;

	/* read each line from stdin and add it to the item list */
	for(i = 0; fgets(buf, sizeof buf, stdin); i++) {
		if(i+1 >= size / sizeof *items)
			if(!(items = realloc(items, (size += BUFSIZ))))


	utf8 = XInternAtom(dc->dpy, "UTF8_STRING", False);

	/* menu geometry */
	/* calculate menu geometry */
	bh = dc->font.height + 2;
	lines = MAX(lines, 0);
	mh = (lines + 1) * bh;


		XGetInputFocus(dc->dpy, &w, &di);
		if(w != root && w != PointerRoot && w != None) {
			/* find top-level window containing current input focus */
			do {
				if(XQueryTree(dc->dpy, (pw = w), &dw, &w, &dws, &du) && dws)
					XFree(dws);
			} while(w != root && w != pw);
			/* find xinerama screen with which the window intersects most */
			if(XGetWindowAttributes(dc->dpy, pw, &wa))
				for(j = 0; j < n; j++)
					if((a = INTERSECT(wa.x, wa.y, wa.width, wa.height, info[j])) > area) {

						i = j;
					}
		}
		/* no focused window is on screen, so use pointer location instead */
		if(!area && XQueryPointer(dc->dpy, root, &dw, &dw, &x, &y, &di, &di, &du))
			for(i = 0; i < n; i++)
				if(INTERSECT(x, y, 1, 1, info[i]))
					break;

		x = info[i].x_org;
		y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
		mw = info[i].width;

	inputw = MIN(inputw, mw/3);
	match();

	/* menu window */
	/* create menu window */
	swa.override_redirect = True;
	swa.background_pixmap = ParentRelative;
	swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;

	                    DefaultVisual(dc->dpy, screen),
	                    CWOverrideRedirect | CWBackPixmap | CWEventMask, &swa);

	/* input methods */
	/* open input methods */
	xim = XOpenIM(dc->dpy, NULL, NULL, NULL);
	xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
	                XNClientWindow, win, XNFocusWindow, win, NULL);

70	70		int i;
71	71
72	72		for(i = 1; i < argc; i++)
73		-	/* single flags */
74		-	if(!strcmp(argv[i], "-v")) {
	73	+	/* these options take no arguments */
	74	+	if(!strcmp(argv[i], "-v")) { /* prints version information */
75	75		puts("dmenu-"VERSION", © 2006-2011 dmenu engineers, see LICENSE for details");
76	76		exit(EXIT_SUCCESS);
77	77		}
78		-	else if(!strcmp(argv[i], "-b"))
	78	+	else if(!strcmp(argv[i], "-b")) /* appears at the bottom of the screen */
79	79		topbar = False;
80		-	else if(!strcmp(argv[i], "-f"))
	80	+	else if(!strcmp(argv[i], "-f")) /* grabs keyboard before reading stdin */
81	81		fast = True;
82		-	else if(!strcmp(argv[i], "-i")) {
	82	+	else if(!strcmp(argv[i], "-i")) { /* case-insensitive item matching */
83	83		fstrncmp = strncasecmp;
84	84		fstrstr = cistrstr;
85	85		}
86	86		else if(i+1 == argc)
87	87		usage();
88		-	/* double flags */
89		-	else if(!strcmp(argv[i], "-l"))
	88	+	/* these options take one argument */
	89	+	else if(!strcmp(argv[i], "-l")) /* number of lines in vertical list */
90	90		lines = atoi(argv[++i]);
91		-	else if(!strcmp(argv[i], "-p"))
	91	+	else if(!strcmp(argv[i], "-p")) /* adds prompt to left of input field */
92	92		prompt = argv[++i];
93		-	else if(!strcmp(argv[i], "-fn"))
	93	+	else if(!strcmp(argv[i], "-fn")) /* font or font set */
94	94		font = argv[++i];
95		-	else if(!strcmp(argv[i], "-nb"))
	95	+	else if(!strcmp(argv[i], "-nb")) /* normal background color */
96	96		normbgcolor = argv[++i];
97		-	else if(!strcmp(argv[i], "-nf"))
	97	+	else if(!strcmp(argv[i], "-nf")) /* normal foreground color */
98	98		normfgcolor = argv[++i];
99		-	else if(!strcmp(argv[i], "-sb"))
	99	+	else if(!strcmp(argv[i], "-sb")) /* selected background color */
100	100		selbgcolor = argv[++i];
101		-	else if(!strcmp(argv[i], "-sf"))
	101	+	else if(!strcmp(argv[i], "-sf")) /* selected foreground color */
102	102		selfgcolor = argv[++i];
103	103		else
104	104		usage();

140	140		n = lines * bh;
141	141		else
142	142		n = mw - (promptw + inputw + textw(dc, "<") + textw(dc, ">"));
143		-
	143	+	/* calculate which items will begin the next page and previous page */
144	144		for(i = 0, next = curr; next; next = next->right)
145	145		if((i += (lines > 0) ? bh : MIN(textw(dc, next->text), n)) > n)
146	146		break;

174	174		drawtext(dc, prompt, selcol);
175	175		dc->x = dc->w;
176	176		}
	177	+	/* draw input field */
177	178		dc->w = (lines > 0 \|\| !matches) ? mw - dc->x : inputw;
178	179		drawtext(dc, text, normcol);
179	180		if((curpos = textnw(dc, text, cursor) + dc->h/2 - 2) < dc->w)
180	181		drawrect(dc, curpos, 2, 1, dc->h - 4, True, FG(dc, normcol));
181	182
182	183		if(lines > 0) {
	184	+	/* draw vertical list */
183	185		dc->w = mw - dc->x;
184	186		for(item = curr; item != next; item = item->right) {
185	187		dc->y += dc->h;

187	189		}
188	190		}
189	191		else if(matches) {
	192	+	/* draw horizontal list */
190	193		dc->x += inputw;
191	194		dc->w = textw(dc, "<");
192	195		if(curr->left)

208	211		grabkeyboard(void) {
209	212		int i;
210	213
	214	+	/* try to grab keyboard, we may have to wait for another process to ungrab */
211	215		for(i = 0; i < 1000; i++) {
212	216		if(XGrabKeyboard(dc->dpy, DefaultRootWindow(dc->dpy), True,
213	217		GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess)

221	225		insert(const char *str, ssize_t n) {
222	226		if(strlen(text) + n > sizeof text - 1)
223	227		return;
	228	+	/* move existing text out of the way, insert new text, and update cursor */
224	229		memmove(&text[cursor + n], &text[cursor], sizeof text - cursor - MAX(n, 0));
225	230		if(n > 0)
226	231		memcpy(&text[cursor], str, n);

297	302		break;
298	303		}
299	304		if(next) {
	305	+	/* jump to end of list and position items in reverse */
300	306		curr = matchend;
301	307		calcoffsets();
302	308		curr = prev;

378	384		Item item, lprefix, lsubstr, prefixend, *substrend;
379	385
380	386		strcpy(buf, text);
	387	+	/* separate input text into tokens to be matched individually */
381	388		for(s = strtok(buf, " "); s; tokv[tokc-1] = s, s = strtok(NULL, " "))
382	389		if(++tokc > tokn && !(tokv = realloc(tokv, ++tokn * sizeof *tokv)))
383	390		eprintf("cannot realloc %u bytes\n", tokn * sizeof *tokv);

388	395		for(i = 0; i < tokc; i++)
389	396		if(!fstrstr(item->text, tokv[i]))
390	397		break;
391		-	if(i != tokc)
	398	+	if(i != tokc) /* not all tokens match */
392	399		continue;
	400	+	/* exact matches go first, then prefixes, then substrings */
393	401		if(!tokc \|\| !fstrncmp(tokv[0], item->text, len+1))
394	402		appenditem(item, &matches, &matchend);
395	403		else if(!fstrncmp(tokv[0], item->text, len))

423	431		nextrune(int inc) {
424	432		ssize_t n;
425	433
	434	+	/* return location of next utf8 rune in the given direction (+1 or -1) */
426	435		for(n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc);
427	436		return n;
428	437		}

434	443		unsigned long dl;
435	444		Atom da;
436	445
	446	+	/* we have been given the current selection, now insert it into input */
437	447		XGetWindowProperty(dc->dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
438	448		utf8, &da, &di, &dl, &dl, (unsigned char **)&p);
439	449		insert(p, (q = strchr(p, '\n')) ? q-p : (ssize_t)strlen(p));

446	456		char buf[sizeof text], p, maxstr = NULL;
447	457		size_t i, max = 0, size = 0;
448	458
	459	+	/* read each line from stdin and add it to the item list */
449	460		for(i = 0; fgets(buf, sizeof buf, stdin); i++) {
450	461		if(i+1 >= size / sizeof *items)
451	462		if(!(items = realloc(items, (size += BUFSIZ))))

508	519
509	520		utf8 = XInternAtom(dc->dpy, "UTF8_STRING", False);
510	521
511		-	/* menu geometry */
	522	+	/* calculate menu geometry */
512	523		bh = dc->font.height + 2;
513	524		lines = MAX(lines, 0);
514	525		mh = (lines + 1) * bh;

521	532
522	533		XGetInputFocus(dc->dpy, &w, &di);
523	534		if(w != root && w != PointerRoot && w != None) {
	535	+	/* find top-level window containing current input focus */
524	536		do {
525	537		if(XQueryTree(dc->dpy, (pw = w), &dw, &w, &dws, &du) && dws)
526	538		XFree(dws);
527	539		} while(w != root && w != pw);
	540	+	/* find xinerama screen with which the window intersects most */
528	541		if(XGetWindowAttributes(dc->dpy, pw, &wa))
529	542		for(j = 0; j < n; j++)
530	543		if((a = INTERSECT(wa.x, wa.y, wa.width, wa.height, info[j])) > area) {

532	545		i = j;
533	546		}
534	547		}
	548	+	/* no focused window is on screen, so use pointer location instead */
535	549		if(!area && XQueryPointer(dc->dpy, root, &dw, &dw, &x, &y, &di, &di, &du))
536	550		for(i = 0; i < n; i++)
537	551		if(INTERSECT(x, y, 1, 1, info[i]))
538	552		break;
	553	+
539	554		x = info[i].x_org;
540	555		y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
541	556		mw = info[i].width;

552	567		inputw = MIN(inputw, mw/3);
553	568		match();
554	569
555		-	/* menu window */
	570	+	/* create menu window */
556	571		swa.override_redirect = True;
557	572		swa.background_pixmap = ParentRelative;
558	573		swa.event_mask = ExposureMask \| KeyPressMask \| VisibilityChangeMask;

561	576		DefaultVisual(dc->dpy, screen),
562	577		CWOverrideRedirect \| CWBackPixmap \| CWEventMask, &swa);
563	578
564		-	/* input methods */
	579	+	/* open input methods */
565	580		xim = XOpenIM(dc->dpy, NULL, NULL, NULL);
566	581		xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing \| XIMStatusNothing,
567	582		XNClientWindow, win, XNFocusWindow, win, NULL);