dmenu/dmenu.c

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C
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/* See LICENSE file for copyright and license details. */
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#include <ctype.h>
#include <locale.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <strings.h>
#include <time.h>
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#include <X11/Xlib.h>
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#include <X11/Xatom.h>
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#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 TEXTW(X) (drw_fontset_getwidth(drw, (X)) + lrpad)
/* enums */
enum { SchemeNorm, SchemeSel, SchemeOut, SchemeLast }; /* color schemes */
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struct item {
char *text;
struct item *left, *right;
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int out;
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};
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static char text[BUFSIZ] = "";
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static char *embed;
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static int bh, mw, mh;
static int inputw = 0, promptw;
static int lrpad; /* sum of left and right padding */
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;
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static Window root, parentwin, win;
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static XIC xic;
static Drw *drw;
static Clr *scheme[SchemeLast];
#include "config.h"
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static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
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static char *(*fstrstr)(const char *, const char *) = strstr;
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static void
appenditem(struct item *item, struct item **list, struct item **last)
{
if (*last)
(*last)->right = item;
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else
*list = item;
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item->left = *last;
item->right = NULL;
*last = item;
}
static void
calcoffsets(void)
{
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int i, n;
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if (lines > 0)
n = lines * bh;
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else
n = mw - (promptw + inputw + TEXTW("<") + TEXTW(">"));
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/* 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)
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break;
for (i = 0, prev = curr; prev && prev->left; prev = prev->left)
if ((i += (lines > 0) ? bh : MIN(TEXTW(prev->left->text), n)) > n)
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break;
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}
static void
cleanup(void)
{
size_t i;
XUngrabKey(dpy, AnyKey, AnyModifier, root);
for (i = 0; i < SchemeLast; i++)
free(scheme[i]);
drw_free(drw);
XSync(dpy, False);
XCloseDisplay(dpy);
}
static char *
cistrstr(const char *s, const char *sub)
{
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size_t len;
for (len = strlen(sub); *s; s++)
if (!strncasecmp(s, sub, len))
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return (char *)s;
return NULL;
}
static int
drawitem(struct item *item, int x, int y, int w)
{
if (item == sel)
drw_setscheme(drw, scheme[SchemeSel]);
else if (item->out)
drw_setscheme(drw, scheme[SchemeOut]);
else
drw_setscheme(drw, scheme[SchemeNorm]);
return drw_text(drw, x, y, w, bh, lrpad / 2, item->text, 0);
}
static void
drawmenu(void)
{
unsigned int curpos;
struct item *item;
int x = 0, y = 0, w;
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drw_setscheme(drw, scheme[SchemeNorm]);
drw_rect(drw, 0, 0, mw, mh, 1, 1);
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if (prompt && *prompt) {
drw_setscheme(drw, scheme[SchemeSel]);
x = drw_text(drw, x, 0, promptw, bh, lrpad / 2, prompt, 0);
}
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/* draw input field */
w = (lines > 0 || !matches) ? mw - x : inputw;
drw_setscheme(drw, scheme[SchemeNorm]);
drw_text(drw, x, 0, w, bh, lrpad / 2, text, 0);
drw_font_getexts(drw->fonts, text, cursor, &curpos, NULL);
if ((curpos += lrpad / 2 - 1) < w) {
drw_setscheme(drw, scheme[SchemeNorm]);
drw_rect(drw, x + curpos, 2, 2, bh - 4, 1, 0);
}
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if (lines > 0) {
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/* draw vertical list */
for (item = curr; item != next; item = item->right)
drawitem(item, x, y += bh, mw - x);
} else if (matches) {
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/* draw horizontal list */
x += inputw;
w = TEXTW("<");
if (curr->left) {
drw_setscheme(drw, scheme[SchemeNorm]);
drw_text(drw, x, 0, w, bh, lrpad / 2, "<", 0);
}
x += w;
for (item = curr; item != next; item = item->right)
x = drawitem(item, x, 0, MIN(TEXTW(item->text), mw - x - TEXTW(">")));
if (next) {
w = TEXTW(">");
drw_setscheme(drw, scheme[SchemeNorm]);
drw_text(drw, mw - w, 0, w, bh, lrpad / 2, ">", 0);
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}
}
drw_map(drw, win, 0, 0, mw, mh);
}
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static void
grabfocus(void)
{
struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 };
Window focuswin;
int i, revertwin;
for (i = 0; i < 100; ++i) {
XGetInputFocus(dpy, &focuswin, &revertwin);
if (focuswin == win)
return;
XSetInputFocus(dpy, win, RevertToParent, CurrentTime);
nanosleep(&ts, NULL);
}
die("cannot grab focus");
}
static void
grabkeyboard(void)
{
struct timespec ts = { .tv_sec = 0, .tv_nsec = 1000000 };
int i;
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if (embed)
return;
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/* 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);
}
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die("cannot grab keyboard");
}
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)))
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die("cannot realloc %u bytes:", tokn * sizeof *tokv);
len = tokc ? strlen(tokv[0]) : 0;
matches = lprefix = lsubstr = matchend = prefixend = substrend = NULL;
textsize = strlen(text) + 1;
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)
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return;
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/* move existing text out of the way, insert new text, and update cursor */
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memmove(&text[cursor + n], &text[cursor], sizeof text - cursor - MAX(n, 0));
if (n > 0)
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memcpy(&text[cursor], str, n);
cursor += n;
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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)
{
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char buf[32];
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int len;
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KeySym ksym = NoSymbol;
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Status status;
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len = XmbLookupString(xic, ev, buf, sizeof buf, &ksym, &status);
if (status == XBufferOverflow)
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return;
if (ev->state & ControlMask)
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switch(ksym) {
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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;
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case XK_g: ksym = XK_Escape; break;
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case XK_h: ksym = XK_BackSpace; break;
case XK_i: ksym = XK_Tab; break;
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case XK_j: /* fallthrough */
case XK_J: /* fallthrough */
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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;
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case XK_k: /* delete right */
text[cursor] = '\0';
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match();
break;
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case XK_u: /* delete left */
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insert(NULL, 0 - cursor);
break;
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case XK_w: /* delete word */
while (cursor > 0 && strchr(worddelimiters, text[nextrune(-1)]))
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insert(NULL, nextrune(-1) - cursor);
while (cursor > 0 && !strchr(worddelimiters, text[nextrune(-1)]))
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insert(NULL, nextrune(-1) - cursor);
break;
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case XK_y: /* paste selection */
case XK_Y:
XConvertSelection(dpy, (ev->state & ShiftMask) ? clip : XA_PRIMARY,
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utf8, utf8, win, CurrentTime);
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return;
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case XK_Return:
case XK_KP_Enter:
break;
case XK_bracketleft:
cleanup();
exit(1);
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default:
return;
}
else if (ev->state & Mod1Mask)
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switch(ksym) {
case XK_g: ksym = XK_Home; break;
case XK_G: ksym = XK_End; break;
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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;
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default:
return;
}
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switch(ksym) {
default:
if (!iscntrl(*buf))
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insert(buf, len);
break;
case XK_Delete:
if (text[cursor] == '\0')
return;
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cursor = nextrune(+1);
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/* fallthrough */
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case XK_BackSpace:
if (cursor == 0)
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return;
insert(NULL, nextrune(-1) - cursor);
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break;
case XK_End:
if (text[cursor] != '\0') {
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cursor = strlen(text);
break;
}
if (next) {
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/* jump to end of list and position items in reverse */
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curr = matchend;
calcoffsets();
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curr = prev;
calcoffsets();
while (next && (curr = curr->right))
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calcoffsets();
}
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sel = matchend;
break;
case XK_Escape:
cleanup();
exit(1);
case XK_Home:
if (sel == matches) {
cursor = 0;
break;
}
sel = curr = matches;
calcoffsets();
break;
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case XK_Left:
if (cursor > 0 && (!sel || !sel->left || lines > 0)) {
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cursor = nextrune(-1);
break;
}
if (lines > 0)
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return;
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/* fallthrough */
case XK_Up:
if (sel && sel->left && (sel = sel->left)->right == curr) {
curr = prev;
calcoffsets();
}
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break;
case XK_Next:
if (!next)
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return;
sel = curr = next;
calcoffsets();
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break;
case XK_Prior:
if (!prev)
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return;
sel = curr = prev;
calcoffsets();
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break;
case XK_Return:
case XK_KP_Enter:
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puts((sel && !(ev->state & ShiftMask)) ? sel->text : text);
if (!(ev->state & ControlMask)) {
cleanup();
exit(0);
}
if (sel)
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sel->out = 1;
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break;
case XK_Right:
if (text[cursor] != '\0') {
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cursor = nextrune(+1);
break;
}
if (lines > 0)
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return;
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/* fallthrough */
case XK_Down:
if (sel && sel->right && (sel = sel->right) == next) {
curr = next;
calcoffsets();
}
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break;
case XK_Tab:
if (!sel)
return;
strncpy(text, sel->text, sizeof text - 1);
text[sizeof text - 1] = '\0';
cursor = strlen(text);
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match();
break;
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}
drawmenu();
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}
static void
paste(void)
{
char *p, *q;
int di;
unsigned long dl;
Atom da;
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/* 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;
size_t i, imax = 0, size = 0;
unsigned int tmpmax = 0;
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/* 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);
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items[i].out = 0;
drw_font_getexts(drw->fonts, buf, strlen(buf), &tmpmax, NULL);
if (tmpmax > inputw) {
inputw = tmpmax;
imax = i;
}
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}
if (items)
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items[i].text = NULL;
inputw = items ? TEXTW(items[imax].text) : 0;
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lines = MIN(lines, i);
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}
static void
run(void)
{
XEvent ev;
while (!XNextEvent(dpy, &ev)) {
if (XFilterEvent(&ev, win))
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continue;
switch(ev.type) {
case Expose:
if (ev.xexpose.count == 0)
drw_map(drw, win, 0, 0, mw, mh);
break;
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case FocusIn:
/* regrab focus from parent window */
if (ev.xfocus.window != win)
grabfocus();
break;
case KeyPress:
keypress(&ev.xkey);
break;
case SelectionNotify:
if (ev.xselection.property == utf8)
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paste();
break;
case VisibilityNotify:
if (ev.xvisibility.state != VisibilityUnobscured)
XRaiseWindow(dpy, win);
break;
}
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}
}
static void
setup(void)
{
int x, y, i = 0;
unsigned int du;
XSetWindowAttributes swa;
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XIM xim;
Window w, dw, *dws;
XWindowAttributes wa;
#ifdef XINERAMA
XineramaScreenInfo *info;
Window pw;
int a, j, di, n, area = 0;
#endif
/* init appearance */
scheme[SchemeNorm] = drw_scm_create(drw, colors[SchemeNorm], 2);
scheme[SchemeSel] = drw_scm_create(drw, colors[SchemeSel], 2);
scheme[SchemeOut] = drw_scm_create(drw, colors[SchemeOut], 2);
clip = XInternAtom(dpy, "CLIPBOARD", False);
utf8 = XInternAtom(dpy, "UTF8_STRING", False);
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/* calculate menu geometry */
bh = drw->fonts->h + 2;
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lines = MAX(lines, 0);
mh = (lines + 1) * bh;
#ifdef XINERAMA
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if (parentwin == root && (info = XineramaQueryScreens(dpy, &n))) {
XGetInputFocus(dpy, &w, &di);
if (mon >= 0 && mon < n)
i = mon;
else if (w != root && w != PointerRoot && w != None) {
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/* 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);
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/* 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;
}
}
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/* no focused window is on screen, so use pointer location instead */
if (mon < 0 && !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;
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x = info[i].x_org;
y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
mw = info[i].width;
XFree(info);
} else
#endif
{
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if (!XGetWindowAttributes(dpy, parentwin, &wa))
die("could not get embedding window attributes: 0x%lx",
parentwin);
x = 0;
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y = topbar ? 0 : wa.height - mh;
mw = wa.width;
}
promptw = (prompt && *prompt) ? TEXTW(prompt) - lrpad / 4 : 0;
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inputw = MIN(inputw, mw/3);
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match();
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/* create menu window */
swa.override_redirect = True;
swa.background_pixel = scheme[SchemeNorm][ColBg].pixel;
swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
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win = XCreateWindow(dpy, parentwin, x, y, mw, mh, 0,
CopyFromParent, CopyFromParent, CopyFromParent,
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CWOverrideRedirect | CWBackPixel | CWEventMask, &swa);
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/* open input methods */
xim = XOpenIM(dpy, NULL, NULL, NULL);
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xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
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XNClientWindow, win, XNFocusWindow, win, NULL);
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XMapRaised(dpy, win);
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if (embed) {
XSelectInput(dpy, parentwin, FocusChangeMask);
if (XQueryTree(dpy, parentwin, &dw, &w, &dws, &du) && dws) {
for (i = 0; i < du && dws[i] != win; ++i)
XSelectInput(dpy, dws[i], FocusChangeMask);
XFree(dws);
}
grabfocus();
}
drw_resize(drw, mw, mh);
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drawmenu();
}
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static void
usage(void)
{
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fputs("usage: dmenu [-bfiv] [-l lines] [-p prompt] [-fn font] [-m monitor]\n"
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" [-nb color] [-nf color] [-sb color] [-sf color] [-w windowid]\n", stderr);
exit(1);
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}
int
main(int argc, char *argv[])
{
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XWindowAttributes wa;
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int i, fast = 0;
for (i = 1; i < argc; i++)
/* these options take no arguments */
if (!strcmp(argv[i], "-v")) { /* prints version information */
puts("dmenu-"VERSION);
exit(0);
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} else if (!strcmp(argv[i], "-b")) /* appears at the bottom of the screen */
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topbar = 0;
else if (!strcmp(argv[i], "-f")) /* grabs keyboard before reading stdin */
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fast = 1;
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 */
colors[SchemeNorm][ColBg] = argv[++i];
else if (!strcmp(argv[i], "-nf")) /* normal foreground color */
colors[SchemeNorm][ColFg] = argv[++i];
else if (!strcmp(argv[i], "-sb")) /* selected background color */
colors[SchemeSel][ColBg] = argv[++i];
else if (!strcmp(argv[i], "-sf")) /* selected foreground color */
colors[SchemeSel][ColFg] = argv[++i];
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else if (!strcmp(argv[i], "-w")) /* embedding window id */
embed = argv[++i];
else
usage();
if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
fputs("warning: no locale support\n", stderr);
if (!(dpy = XOpenDisplay(NULL)))
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die("cannot open display");
screen = DefaultScreen(dpy);
root = RootWindow(dpy, screen);
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if (!embed || !(parentwin = strtol(embed, NULL, 0)))
parentwin = root;
if (!XGetWindowAttributes(dpy, parentwin, &wa))
die("could not get embedding window attributes: 0x%lx",
parentwin);
drw = drw_create(dpy, screen, root, wa.width, wa.height);
if (!drw_fontset_create(drw, fonts, LENGTH(fonts)))
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die("no fonts could be loaded.");
lrpad = drw->fonts->h;
if (fast) {
grabkeyboard();
readstdin();
} else {
readstdin();
grabkeyboard();
}
setup();
run();
return 1; /* unreachable */
}