add lots of comments
This commit is contained in:
Connor Lane Smith
parent
dd29c5d480
commit
7b1493a631
51
dmenu.c
51
dmenu.c
|
|
@ -70,35 +70,35 @@ main(int argc, char *argv[]) {
|
|||
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();
|
||||
|
|
@ -140,7 +140,7 @@ calcoffsets(void) {
|
|||
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;
|
||||
|
|
@ -174,12 +174,14 @@ drawmenu(void) {
|
|||
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;
|
||||
|
|
@ -187,6 +189,7 @@ drawmenu(void) {
|
|||
}
|
||||
}
|
||||
else if(matches) {
|
||||
/* draw horizontal list */
|
||||
dc->x += inputw;
|
||||
dc->w = textw(dc, "<");
|
||||
if(curr->left)
|
||||
|
|
@ -208,6 +211,7 @@ void
|
|||
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)
|
||||
|
|
@ -221,6 +225,7 @@ void
|
|||
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);
|
||||
|
|
@ -297,6 +302,7 @@ keypress(XKeyEvent *ev) {
|
|||
break;
|
||||
}
|
||||
if(next) {
|
||||
/* jump to end of list and position items in reverse */
|
||||
curr = matchend;
|
||||
calcoffsets();
|
||||
curr = prev;
|
||||
|
|
@ -378,6 +384,7 @@ match(void) {
|
|||
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);
|
||||
|
|
@ -388,8 +395,9 @@ match(void) {
|
|||
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))
|
||||
|
|
@ -423,6 +431,7 @@ size_t
|
|||
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;
|
||||
}
|
||||
|
|
@ -434,6 +443,7 @@ paste(void) {
|
|||
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));
|
||||
|
|
@ -446,6 +456,7 @@ readstdin(void) {
|
|||
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))))
|
||||
|
|
@ -508,7 +519,7 @@ setup(void) {
|
|||
|
||||
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;
|
||||
|
|
@ -521,10 +532,12 @@ setup(void) {
|
|||
|
||||
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) {
|
||||
|
|
@ -532,10 +545,12 @@ setup(void) {
|
|||
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;
|
||||
|
|
@ -552,7 +567,7 @@ setup(void) {
|
|||
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;
|
||||
|
|
@ -561,7 +576,7 @@ setup(void) {
|
|||
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);
|
||||
|
|
|
|||
Loading…
Reference in a new issue