dmenu/dmenu.c

683 lines
17 KiB
C

/* See LICENSE file for copyright and license details. */
#include <ctype.h>
#include <locale.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <time.h>
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <X11/Xutil.h>
#ifdef XINERAMA
#include <X11/extensions/Xinerama.h>
#endif
#include <X11/Xft/Xft.h>
#include "drw.h"
#include "util.h"
/* macros */
#define INTERSECT(x,y,w,h,r) (MAX(0, MIN((x)+(w),(r).x_org+(r).width) - MAX((x),(r).x_org)) \
* MAX(0, MIN((y)+(h),(r).y_org+(r).height) - MAX((y),(r).y_org)))
#define LENGTH(X) (sizeof X / sizeof X[0])
#define TEXTNW(X,N) (drw_font_getexts_width(drw->fonts[0], (X), (N)))
#define TEXTW(X) (drw_text(drw, 0, 0, 0, 0, (X), 0) + drw->fonts[0]->h)
/* enums */
enum { SchemeNorm, SchemeSel, SchemeOut, SchemeLast }; /* color schemes */
struct item {
char *text;
struct item *left, *right;
bool out;
};
static char text[BUFSIZ] = "";
static int bh, mw, mh;
static int sw, sh; /* X display screen geometry width, height */
static int inputw, promptw;
static size_t cursor;
static struct item *items = NULL;
static struct item *matches, *matchend;
static struct item *prev, *curr, *next, *sel;
static int mon = -1, screen;
static Atom clip, utf8;
static Display *dpy;
static Window root, win;
static XIC xic;
static ClrScheme scheme[SchemeLast];
static Drw *drw;
#include "config.h"
static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
static char *(*fstrstr)(const char *, const char *) = strstr;
static void
appenditem(struct item *item, struct item **list, struct item **last)
{
if (*last)
(*last)->right = item;
else
*list = item;
item->left = *last;
item->right = NULL;
*last = item;
}
static void
calcoffsets(void)
{
int i, n;
if (lines > 0)
n = lines * bh;
else
n = mw - (promptw + inputw + TEXTW("<") + TEXTW(">"));
/* 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(next->text), n)) > n)
break;
for (i = 0, prev = curr; prev && prev->left; prev = prev->left)
if ((i += (lines > 0) ? bh : MIN(TEXTW(prev->left->text), n)) > n)
break;
}
static void
cleanup(void)
{
size_t i;
XUngrabKey(dpy, AnyKey, AnyModifier, root);
for (i = 0; i < SchemeLast; i++) {
drw_clr_free(scheme[i].bg);
drw_clr_free(scheme[i].fg);
}
drw_free(drw);
XSync(dpy, False);
XCloseDisplay(dpy);
}
static char *
cistrstr(const char *s, const char *sub)
{
size_t len;
for (len = strlen(sub); *s; s++)
if (!strncasecmp(s, sub, len))
return (char *)s;
return NULL;
}
static void
drawmenu(void)
{
int curpos;
struct item *item;
int x = 0, y = 0, h = bh, w;
drw_setscheme(drw, &scheme[SchemeNorm]);
drw_rect(drw, 0, 0, mw, mh, 1, 1, 1);
if (prompt && *prompt) {
drw_setscheme(drw, &scheme[SchemeSel]);
drw_text(drw, x, 0, promptw, bh, prompt, 0);
x += promptw;
}
/* draw input field */
w = (lines > 0 || !matches) ? mw - x : inputw;
drw_setscheme(drw, &scheme[SchemeNorm]);
drw_text(drw, x, 0, w, bh, text, 0);
if ((curpos = TEXTNW(text, cursor) + bh / 2 - 2) < w) {
drw_setscheme(drw, &scheme[SchemeNorm]);
drw_rect(drw, x + curpos + 2, 2, 1, bh - 4, 1, 1, 0);
}
if (lines > 0) {
/* draw vertical list */
w = mw - x;
for (item = curr; item != next; item = item->right) {
y += h;
if (item == sel)
drw_setscheme(drw, &scheme[SchemeSel]);
else if (item->out)
drw_setscheme(drw, &scheme[SchemeOut]);
else
drw_setscheme(drw, &scheme[SchemeNorm]);
drw_text(drw, x, y, w, bh, item->text, 0);
}
} else if (matches) {
/* draw horizontal list */
x += inputw;
w = TEXTW("<");
if (curr->left) {
drw_setscheme(drw, &scheme[SchemeNorm]);
drw_text(drw, x, 0, w, bh, "<", 0);
}
for (item = curr; item != next; item = item->right) {
x += w;
w = MIN(TEXTW(item->text), mw - x - TEXTW(">"));
if (item == sel)
drw_setscheme(drw, &scheme[SchemeSel]);
else if (item->out)
drw_setscheme(drw, &scheme[SchemeOut]);
else
drw_setscheme(drw, &scheme[SchemeNorm]);
drw_text(drw, x, 0, w, bh, item->text, 0);
}
w = TEXTW(">");
x = mw - w;
if (next) {
drw_setscheme(drw, &scheme[SchemeNorm]);
drw_text(drw, x, 0, w, bh, ">", 0);
}
}
drw_map(drw, win, 0, 0, mw, mh);
}
static void
grabkeyboard(void)
{
struct timespec ts = { .tv_sec = 0, .tv_nsec = 1000000 };
int i;
/* try to grab keyboard, we may have to wait for another process to ungrab */
for (i = 0; i < 1000; i++) {
if (XGrabKeyboard(dpy, DefaultRootWindow(dpy), True,
GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess)
return;
nanosleep(&ts, NULL);
}
die("cannot grab keyboard\n");
}
static void
match(void)
{
static char **tokv = NULL;
static int tokn = 0;
char buf[sizeof text], *s;
int i, tokc = 0;
size_t len, textsize;
struct 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)))
die("cannot realloc %u bytes\n", tokn * sizeof *tokv);
len = tokc ? strlen(tokv[0]) : 0;
matches = lprefix = lsubstr = matchend = prefixend = substrend = NULL;
textsize = strlen(text);
for (item = items; item && item->text; item++) {
for (i = 0; i < tokc; i++)
if (!fstrstr(item->text, tokv[i]))
break;
if (i != tokc) /* not all tokens match */
continue;
/* exact matches go first, then prefixes, then substrings */
if (!tokc || !fstrncmp(text, item->text, textsize))
appenditem(item, &matches, &matchend);
else if (!fstrncmp(tokv[0], item->text, len))
appenditem(item, &lprefix, &prefixend);
else
appenditem(item, &lsubstr, &substrend);
}
if (lprefix) {
if (matches) {
matchend->right = lprefix;
lprefix->left = matchend;
} else
matches = lprefix;
matchend = prefixend;
}
if (lsubstr) {
if (matches) {
matchend->right = lsubstr;
lsubstr->left = matchend;
} else
matches = lsubstr;
matchend = substrend;
}
curr = sel = matches;
calcoffsets();
}
static 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);
cursor += n;
match();
}
static 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;
}
static void
keypress(XKeyEvent *ev)
{
char buf[32];
int len;
KeySym ksym = NoSymbol;
Status status;
len = XmbLookupString(xic, ev, buf, sizeof buf, &ksym, &status);
if (status == XBufferOverflow)
return;
if (ev->state & ControlMask)
switch(ksym) {
case XK_a: ksym = XK_Home; break;
case XK_b: ksym = XK_Left; break;
case XK_c: ksym = XK_Escape; break;
case XK_d: ksym = XK_Delete; break;
case XK_e: ksym = XK_End; break;
case XK_f: ksym = XK_Right; break;
case XK_g: ksym = XK_Escape; break;
case XK_h: ksym = XK_BackSpace; break;
case XK_i: ksym = XK_Tab; break;
case XK_j: /* fallthrough */
case XK_J: /* fallthrough */
case XK_m: /* fallthrough */
case XK_M: ksym = XK_Return; ev->state &= ~ControlMask; break;
case XK_n: ksym = XK_Down; break;
case XK_p: ksym = XK_Up; break;
case XK_k: /* delete right */
text[cursor] = '\0';
match();
break;
case XK_u: /* delete left */
insert(NULL, 0 - cursor);
break;
case XK_w: /* delete word */
while (cursor > 0 && text[nextrune(-1)] == ' ')
insert(NULL, nextrune(-1) - cursor);
while (cursor > 0 && text[nextrune(-1)] != ' ')
insert(NULL, nextrune(-1) - cursor);
break;
case XK_y: /* paste selection */
case XK_Y:
XConvertSelection(dpy, (ev->state & ShiftMask) ? clip : XA_PRIMARY,
utf8, utf8, win, CurrentTime);
return;
case XK_Return:
case XK_KP_Enter:
break;
case XK_bracketleft:
cleanup();
exit(1);
default:
return;
}
else if (ev->state & Mod1Mask)
switch(ksym) {
case XK_g: ksym = XK_Home; break;
case XK_G: ksym = XK_End; break;
case XK_h: ksym = XK_Up; break;
case XK_j: ksym = XK_Next; break;
case XK_k: ksym = XK_Prior; break;
case XK_l: ksym = XK_Down; break;
default:
return;
}
switch(ksym) {
default:
if (!iscntrl(*buf))
insert(buf, len);
break;
case XK_Delete:
if (text[cursor] == '\0')
return;
cursor = nextrune(+1);
/* fallthrough */
case XK_BackSpace:
if (cursor == 0)
return;
insert(NULL, nextrune(-1) - cursor);
break;
case XK_End:
if (text[cursor] != '\0') {
cursor = strlen(text);
break;
}
if (next) {
/* jump to end of list and position items in reverse */
curr = matchend;
calcoffsets();
curr = prev;
calcoffsets();
while (next && (curr = curr->right))
calcoffsets();
}
sel = matchend;
break;
case XK_Escape:
cleanup();
exit(1);
case XK_Home:
if (sel == matches) {
cursor = 0;
break;
}
sel = curr = matches;
calcoffsets();
break;
case XK_Left:
if (cursor > 0 && (!sel || !sel->left || lines > 0)) {
cursor = nextrune(-1);
break;
}
if (lines > 0)
return;
/* fallthrough */
case XK_Up:
if (sel && sel->left && (sel = sel->left)->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:
case XK_KP_Enter:
puts((sel && !(ev->state & ShiftMask)) ? sel->text : text);
if (!(ev->state & ControlMask)) {
cleanup();
exit(0);
}
if (sel)
sel->out = true;
break;
case XK_Right:
if (text[cursor] != '\0') {
cursor = nextrune(+1);
break;
}
if (lines > 0)
return;
/* fallthrough */
case XK_Down:
if (sel && sel->right && (sel = sel->right) == next) {
curr = next;
calcoffsets();
}
break;
case XK_Tab:
if (!sel)
return;
strncpy(text, sel->text, sizeof text - 1);
text[sizeof text - 1] = '\0';
cursor = strlen(text);
match();
break;
}
drawmenu();
}
static void
paste(void)
{
char *p, *q;
int di;
unsigned long dl;
Atom da;
/* we have been given the current selection, now insert it into input */
XGetWindowProperty(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));
XFree(p);
drawmenu();
}
static void
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))))
die("cannot realloc %u bytes:", size);
if ((p = strchr(buf, '\n')))
*p = '\0';
if (!(items[i].text = strdup(buf)))
die("cannot strdup %u bytes:", strlen(buf) + 1);
items[i].out = false;
if (strlen(items[i].text) > max)
max = strlen(maxstr = items[i].text);
}
if (items)
items[i].text = NULL;
inputw = maxstr ? TEXTW(maxstr) : 0;
lines = MIN(lines, i);
}
static void
run(void)
{
XEvent ev;
while (!XNextEvent(dpy, &ev)) {
if (XFilterEvent(&ev, win))
continue;
switch(ev.type) {
case Expose:
if (ev.xexpose.count == 0)
drw_map(drw, win, 0, 0, mw, mh);
break;
case KeyPress:
keypress(&ev.xkey);
break;
case SelectionNotify:
if (ev.xselection.property == utf8)
paste();
break;
case VisibilityNotify:
if (ev.xvisibility.state != VisibilityUnobscured)
XRaiseWindow(dpy, win);
break;
}
}
}
static void
setup(void)
{
int x, y;
XSetWindowAttributes swa;
XIM xim;
#ifdef XINERAMA
XineramaScreenInfo *info;
Window w, pw, dw, *dws;
XWindowAttributes wa;
int a, j, di, n, i = 0, area = 0;
unsigned int du;
#endif
/* init appearance */
scheme[SchemeNorm].bg = drw_clr_create(drw, normbgcolor);
scheme[SchemeNorm].fg = drw_clr_create(drw, normfgcolor);
scheme[SchemeSel].bg = drw_clr_create(drw, selbgcolor);
scheme[SchemeSel].fg = drw_clr_create(drw, selfgcolor);
scheme[SchemeOut].bg = drw_clr_create(drw, outbgcolor);
scheme[SchemeOut].fg = drw_clr_create(drw, outfgcolor);
clip = XInternAtom(dpy, "CLIPBOARD", False);
utf8 = XInternAtom(dpy, "UTF8_STRING", False);
/* calculate menu geometry */
bh = drw->fonts[0]->h + 2;
lines = MAX(lines, 0);
mh = (lines + 1) * bh;
#ifdef XINERAMA
if ((info = XineramaQueryScreens(dpy, &n))) {
XGetInputFocus(dpy, &w, &di);
if (mon != -1 && mon < n)
i = mon;
else if (w != root && w != PointerRoot && w != None) {
/* find top-level window containing current input focus */
do {
if (XQueryTree(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(dpy, pw, &wa))
for (j = 0; j < n; j++)
if ((a = INTERSECT(wa.x, wa.y, wa.width, wa.height, info[j])) > area) {
area = a;
i = j;
}
}
/* no focused window is on screen, so use pointer location instead */
if (mon == -1 && !area && XQueryPointer(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;
XFree(info);
} else
#endif
{
x = 0;
y = topbar ? 0 : sh - mh;
mw = sw;
}
promptw = (prompt && *prompt) ? TEXTW(prompt) : 0;
inputw = MIN(inputw, mw/3);
match();
/* create menu window */
swa.override_redirect = True;
swa.background_pixel = scheme[SchemeNorm].bg->pix;
swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
win = XCreateWindow(dpy, root, x, y, mw, mh, 0,
DefaultDepth(dpy, screen), CopyFromParent,
DefaultVisual(dpy, screen),
CWOverrideRedirect | CWBackPixel | CWEventMask, &swa);
/* open input methods */
xim = XOpenIM(dpy, NULL, NULL, NULL);
xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
XNClientWindow, win, XNFocusWindow, win, NULL);
XMapRaised(dpy, win);
drw_resize(drw, mw, mh);
drawmenu();
}
static void
usage(void)
{
fputs("usage: dmenu [-b] [-f] [-i] [-l lines] [-p prompt] [-fn font] [-m monitor]\n"
" [-nb color] [-nf color] [-sb color] [-sf color] [-v]\n", stderr);
exit(1);
}
int
main(int argc, char *argv[])
{
bool fast = false;
int i;
for (i = 1; i < argc; i++)
/* these options take no arguments */
if (!strcmp(argv[i], "-v")) { /* prints version information */
puts("dmenu-"VERSION);
exit(0);
} else if (!strcmp(argv[i], "-b")) /* appears at the bottom of the screen */
topbar = false;
else if (!strcmp(argv[i], "-f")) /* grabs keyboard before reading stdin */
fast = true;
else if (!strcmp(argv[i], "-i")) { /* case-insensitive item matching */
fstrncmp = strncasecmp;
fstrstr = cistrstr;
} else if (i + 1 == argc)
usage();
/* 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], "-m"))
mon = atoi(argv[++i]);
else if (!strcmp(argv[i], "-p")) /* adds prompt to left of input field */
prompt = argv[++i];
else if (!strcmp(argv[i], "-fn")) /* font or font set */
fonts[0] = argv[++i];
else if (!strcmp(argv[i], "-nb")) /* normal background color */
normbgcolor = argv[++i];
else if (!strcmp(argv[i], "-nf")) /* normal foreground color */
normfgcolor = argv[++i];
else if (!strcmp(argv[i], "-sb")) /* selected background color */
selbgcolor = argv[++i];
else if (!strcmp(argv[i], "-sf")) /* selected foreground color */
selfgcolor = argv[++i];
else
usage();
if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
fputs("warning: no locale support\n", stderr);
if (!(dpy = XOpenDisplay(NULL)))
die("cannot open display\n");
screen = DefaultScreen(dpy);
root = RootWindow(dpy, screen);
sw = DisplayWidth(dpy, screen);
sh = DisplayHeight(dpy, screen);
drw = drw_create(dpy, screen, root, sw, sh);
drw_load_fonts(drw, fonts, LENGTH(fonts));
if (!drw->fontcount)
die("no fonts could be loaded.\n");
drw_setscheme(drw, &scheme[SchemeNorm]);
if (fast) {
grabkeyboard();
readstdin();
} else {
readstdin();
grabkeyboard();
}
setup();
run();
return 1; /* unreachable */
}