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dmenu.c
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/* See LICENSE file for copyright and license details. */
#include <ctype.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <time.h>
#include <unistd.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 <X11/Xresource.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)
/* define opaqueness */
#define OPAQUE 0xFFU
/* enums */
enum
{
SchemeNorm,
SchemeSel,
SchemeOut,
SchemeLast
}; /* color schemes */
struct item
{
char *text;
struct item *left, *right;
int out;
};
static char text[BUFSIZ] = "";
static char *embed;
static int bh, mw, mh;
static int inputw = 0, promptw, passwd = 0;
static int lrpad; /* sum of left and right padding */
static int reject_no_match = 0;
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, parentwin, win;
static XIC xic;
static Drw *drw;
static int usergb = 0;
static Visual *visual;
static int depth;
static Colormap cmap;
static Clr *scheme[SchemeLast];
#include "config.h"
static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
static char *(*fstrstr)(const char *, const char *) = strstr;
static void
xinitvisual()
{
XVisualInfo *infos;
XRenderPictFormat *fmt;
int nitems;
int i;
XVisualInfo tpl = {
.screen = screen,
.depth = 32,
.class = TrueColor};
long masks = VisualScreenMask | VisualDepthMask | VisualClassMask;
infos = XGetVisualInfo(dpy, masks, &tpl, &nitems);
visual = NULL;
for (i = 0; i < nitems; i++)
{
fmt = XRenderFindVisualFormat(dpy, infos[i].visual);
if (fmt->type == PictTypeDirect && fmt->direct.alphaMask)
{
visual = infos[i].visual;
depth = infos[i].depth;
cmap = XCreateColormap(dpy, root, visual, AllocNone);
usergb = 1;
break;
}
}
XFree(infos);
if (!visual)
{
visual = DefaultVisual(dpy, screen);
depth = DefaultDepth(dpy, screen);
cmap = DefaultColormap(dpy, screen);
}
}
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++)
free(scheme[i]);
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 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;
char *censort;
drw_setscheme(drw, scheme[SchemeNorm]);
drw_rect(drw, 0, 0, mw, mh, 1, 1);
if (prompt && *prompt)
{
drw_setscheme(drw, scheme[SchemeSel]);
x = drw_text(drw, x, 0, promptw, bh, lrpad / 2, prompt, 0);
}
/* draw input field */
w = (lines > 0 || !matches) ? mw - x : inputw;
drw_setscheme(drw, scheme[SchemeNorm]);
if (passwd)
{
censort = ecalloc(1, sizeof(text));
memset(censort, '.', strlen(text));
drw_text(drw, x, 0, w, bh, lrpad / 2, censort, 0);
free(censort);
}
else
drw_text(drw, x, 0, w, bh, lrpad / 2, text, 0);
curpos = TEXTW(text) - TEXTW(&text[cursor]);
if ((curpos += lrpad / 2 - 1) < w)
{
drw_setscheme(drw, scheme[SchemeNorm]);
drw_rect(drw, x + curpos, 2, 2, bh - 4, 1, 0);
}
if (lines > 0)
{
/* draw vertical list */
for (item = curr; item != next; item = item->right)
drawitem(item, x, y += bh, mw - x);
}
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, 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);
}
}
drw_map(drw, win, 0, 0, mw, mh);
}
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;
if (embed)
return;
/* 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");
}
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:", 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)
return;
static char last[BUFSIZ] = "";
if (reject_no_match)
{
/* store last text value in case we need to revert it */
memcpy(last, text, BUFSIZ);
}
/* 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();
if (!matches && reject_no_match)
{
/* revert to last text value if theres no match */
memcpy(text, last, BUFSIZ);
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
movewordedge(int dir)
{
if (dir < 0)
{ /* move cursor to the start of the word*/
while (cursor > 0 && strchr(worddelimiters, text[nextrune(-1)]))
cursor = nextrune(-1);
while (cursor > 0 && !strchr(worddelimiters, text[nextrune(-1)]))
cursor = nextrune(-1);
}
else
{ /* move cursor to the end of the word */
while (text[cursor] && strchr(worddelimiters, text[cursor]))
cursor = nextrune(+1);
while (text[cursor] && !strchr(worddelimiters, text[cursor]))
cursor = nextrune(+1);
}
}
static void
keypress(XKeyEvent *ev)
{
char buf[32];
int len;
KeySym ksym;
Status status;
len = XmbLookupString(xic, ev, buf, sizeof buf, &ksym, &status);
switch (status)
{
default: /* XLookupNone, XBufferOverflow */
return;
case XLookupChars:
goto insert;
case XLookupKeySym:
case XLookupBoth:
break;
}
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 && strchr(worddelimiters, text[nextrune(-1)]))
insert(NULL, nextrune(-1) - cursor);
while (cursor > 0 && !strchr(worddelimiters, 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_Left:
movewordedge(-1);
goto draw;
case XK_Right:
movewordedge(+1);
goto draw;
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_b:
movewordedge(-1);
goto draw;
case XK_f:
movewordedge(+1);
goto draw;
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:
insert:
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 = 1;
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;
}
draw:
drawmenu();
}
static void
buttonpress(XEvent *e)
{
struct item *item;
XButtonPressedEvent *ev = &e->xbutton;
int x = 0, y = 0, h = bh, w;
if (ev->window != win)
return;
/* right-click: exit */
if (ev->button == Button3)
exit(1);
if (prompt && *prompt)
x += promptw;
/* input field */
w = (lines > 0 || !matches) ? mw - x : inputw;
/* left-click on input: clear input,
* NOTE: if there is no left-arrow the space for < is reserved so
* add that to the input width */
if (ev->button == Button1 &&
((lines <= 0 && ev->x >= 0 && ev->x <= x + w + ((!prev || !curr->left) ? TEXTW("<") : 0)) ||
(lines > 0 && ev->y >= y && ev->y <= y + h)))
{
insert(NULL, -cursor);
drawmenu();
return;
}
/* middle-mouse click: paste selection */
if (ev->button == Button2)
{
XConvertSelection(dpy, (ev->state & ShiftMask) ? clip : XA_PRIMARY,
utf8, utf8, win, CurrentTime);
drawmenu();
return;
}
/* scroll up */
if (ev->button == Button4 && prev)
{
sel = curr = prev;
calcoffsets();
drawmenu();
return;
}
/* scroll down */
if (ev->button == Button5 && next)
{
sel = curr = next;
calcoffsets();
drawmenu();
return;
}
if (ev->button != Button1)
return;
if (ev->state & ~ControlMask)
return;
if (lines > 0)
{
/* vertical list: (ctrl)left-click on item */
w = mw - x;
for (item = curr; item != next; item = item->right)
{
y += h;
if (ev->y >= y && ev->y <= (y + h))
{
puts(item->text);
if (!(ev->state & ControlMask))
exit(0);
sel = item;
if (sel)
{
sel->out = 1;
drawmenu();
}
return;
}
}
}
else if (matches)
{
/* left-click on left arrow */
x += inputw;
w = TEXTW("<");
if (prev && curr->left)
{
if (ev->x >= x && ev->x <= x + w)
{
sel = curr = prev;
calcoffsets();
drawmenu();
return;
}
}
/* horizontal list: (ctrl)left-click on item */
for (item = curr; item != next; item = item->right)
{
x += w;
w = MIN(TEXTW(item->text), mw - x - TEXTW(">"));
if (ev->x >= x && ev->x <= x + w)
{
puts(item->text);
if (!(ev->state & ControlMask))
exit(0);
sel = item;
if (sel)
{
sel->out = 1;
drawmenu();
}
return;
}
}
/* left-click on right arrow */
w = TEXTW(">");
x = mw - w;
if (next && ev->x >= x && ev->x <= x + w)
{
sel = curr = next;
calcoffsets();
drawmenu();
return;
}
}
}
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 */
if (XGetWindowProperty(dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
utf8, &da, &di, &dl, &dl, (unsigned char **)&p) == Success &&
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;
if (passwd)
{
inputw = lines = 0;
return;
}
/* 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 = 0;
drw_font_getexts(drw->fonts, buf, strlen(buf), &tmpmax, NULL);
if (tmpmax > inputw)
{
inputw = tmpmax;
imax = i;
}
}
if (items)
items[i].text = NULL;
inputw = items ? TEXTW(items[imax].text) : 0;
lines = MIN(lines, i);
}
static void
run(void)
{
XEvent ev;
while (!XNextEvent(dpy, &ev))
{
if (XFilterEvent(&ev, win))
continue;
switch (ev.type)
{
case ButtonPress:
buttonpress(&ev);
break;
case DestroyNotify:
if (ev.xdestroywindow.window != win)
break;
cleanup();
exit(1);
case Expose:
if (ev.xexpose.count == 0)
drw_map(drw, win, 0, 0, mw, mh);
break;
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)
paste();
break;
case VisibilityNotify:
if (ev.xvisibility.state != VisibilityUnobscured)
XRaiseWindow(dpy, win);
break;
}
}
}
static void
setup(void)
{
int x, y, i, j;
unsigned int du;
XSetWindowAttributes swa;
XIM xim;
Window w, dw, *dws;
XWindowAttributes wa;
XClassHint ch = {"dmenu", "dmenu"};
#ifdef XINERAMA
XineramaScreenInfo *info;
Window pw;
int a, di, n, area = 0;
#endif
/* init appearance */
for (j = 0; j < SchemeLast; j++)
scheme[j] = drw_scm_create(drw, colors[j], alphas[j], 2);
clip = XInternAtom(dpy, "CLIPBOARD", False);
utf8 = XInternAtom(dpy, "UTF8_STRING", False);
/* calculate menu geometry */
bh = drw->fonts->h + 2;
lines = MAX(lines, 0);
mh = (lines + 1) * bh;
#ifdef XINERAMA
i = 0;
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)
{
/* 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 < 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;
x = info[i].x_org;
y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
mw = info[i].width;
XFree(info);
}
else
#endif
{
if (!XGetWindowAttributes(dpy, parentwin, &wa))
die("could not get embedding window attributes: 0x%lx",
parentwin);
x = 0;
y = topbar ? 0 : wa.height - mh;
mw = wa.width;
}
promptw = (prompt && *prompt) ? TEXTW(prompt) - lrpad / 4 : 0;
inputw = MIN(inputw, mw / 3);
match();
/* create menu window */
swa.override_redirect = True;
swa.background_pixel = scheme[SchemeNorm][ColBg].pixel;
swa.border_pixel = 0;
swa.colormap = cmap;
swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask |
ButtonPressMask;
win = XCreateWindow(dpy, parentwin, x, y, mw, mh, 0,
depth, InputOutput, visual,
CWOverrideRedirect | CWBackPixel | CWColormap | CWEventMask | CWBorderPixel, &swa);
XSetClassHint(dpy, win, &ch);
/* input methods */
if ((xim = XOpenIM(dpy, NULL, NULL, NULL)) == NULL)
die("XOpenIM failed: could not open input device");
xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
XNClientWindow, win, XNFocusWindow, win, NULL);
XMapRaised(dpy, win);
if (embed)
{
XSelectInput(dpy, parentwin, FocusChangeMask | SubstructureNotifyMask);
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);
drawmenu();
}
static void
usage(void)
{
fputs("usage: dmenu [-bfiPrv] [-l lines] [-p prompt] [-fn font] [-m monitor]\n"
" [-nb color] [-nf color] [-sb color] [-sf color] [-w windowid]\n",
stderr);
exit(1);
}