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/* See LICENSE file for copyright and license details. */
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.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 "draw.h"
#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 MIN(a,b) ((a) < (b) ? (a) : (b))
#define MAX(a,b) ((a) > (b) ? (a) : (b))
typedef struct Item Item;
struct Item {
char *text;
Item *left, *right;
Bool out;
};
static void appenditem(Item *item, Item **list, Item **last);
static void calcoffsets(void);
static char *cistrstr(const char *s, const char *sub);
static void drawmenu(void);
static void grabkeyboard(void);
static void insert(const char *str, ssize_t n);
static void keypress(XKeyEvent *ev);
static void match(void);
static size_t nextrune(int inc);
static void paste(void);
static void readstdin(void);
static void run(void);
static void setup(void);
static void usage(void);
static char text[BUFSIZ] = "";
static int bh, mw, mh;
static int inputw, promptw;
static size_t cursor = 0;
static unsigned long normcol[ColLast];
static unsigned long selcol[ColLast];
static unsigned long outcol[ColLast];
static Atom clip, utf8;
static DC *dc;
static Item *items = NULL;
static Item *matches, *matchend;
static Item *prev, *curr, *next, *sel;
static Window win;
static XIC xic;
#include "config.h"
static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
static char *(*fstrstr)(const char *, const char *) = strstr;
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", © 2006-2012 dmenu engineers, see LICENSE for details");
exit(EXIT_SUCCESS);
}
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], "-p")) /* adds prompt to left of input field */
prompt = argv[++i];
else if(!strcmp(argv[i], "-fn")) /* font or font set */
font = 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();
dc = initdc();
initfont(dc, font);
if(fast) {
grabkeyboard();
readstdin();
}
else {
readstdin();
grabkeyboard();
}
setup();
run();
return 1; /* unreachable */
}
void
appenditem(Item *item, Item **list, Item **last) {
if(*last)
(*last)->right = item;
else
*list = item;
item->left = *last;
item->right = NULL;
*last = item;
}
void
calcoffsets(void) {
int i, n;
if(lines > 0)
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;
for(i = 0, prev = curr; prev && prev->left; prev = prev->left)
if((i += (lines > 0) ? bh : MIN(textw(dc, prev->left->text), n)) > n)
break;
}
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;
}
void
drawmenu(void) {
int curpos;
Item *item;
dc->x = 0;
dc->y = 0;
dc->h = bh;
drawrect(dc, 0, 0, mw, mh, True, BG(dc, normcol));
if(prompt && *prompt) {
dc->w = promptw;
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;
drawtext(dc, item->text, (item == sel) ? selcol :
(item->out) ? outcol : normcol);
}
}
else if(matches) {
/* draw horizontal list */
dc->x += inputw;
dc->w = textw(dc, "<");
if(curr->left)
drawtext(dc, "<", normcol);
for(item = curr; item != next; item = item->right) {
dc->x += dc->w;
dc->w = MIN(textw(dc, item->text), mw - dc->x - textw(dc, ">"));
drawtext(dc, item->text, (item == sel) ? selcol :
(item->out) ? outcol : normcol);
}
dc->w = textw(dc, ">");
dc->x = mw - dc->w;
if(next)
drawtext(dc, ">", normcol);
}
mapdc(dc, win, mw, mh);
}
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)
return;
usleep(1000);
}
eprintf("cannot grab keyboard\n");
}
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();
}
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_c: ksym = XK_Escape; break;
case XK_e: ksym = XK_End; break;
case XK_g: ksym = XK_Escape; break;
case XK_m: ksym = XK_BackSpace; break;
case XK_i: ksym = XK_Up; break;
case XK_j: ksym = XK_Left; break;
case XK_k: ksym = XK_Down; break;
case XK_l: ksym = XK_Right; break;
case XK_period: ksym = XK_Delete; break;
case XK_o: /* 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 */
XConvertSelection(dc->dpy, (ev->state & ShiftMask) ? clip : XA_PRIMARY,
utf8, utf8, win, CurrentTime);
return;
case XK_Return:
case XK_KP_Enter:
break;
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:
exit(EXIT_FAILURE);
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))
exit(EXIT_SUCCESS);
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();
}
void
match(void) {
static char **tokv = NULL;
static int tokn = 0;
char buf[sizeof text], *s;
int i, tokc = 0;
size_t len;
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);
len = tokc ? strlen(tokv[0]) : 0;
matches = lprefix = lsubstr = matchend = prefixend = substrend = NULL;
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(tokv[0], item->text, len+1))
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();
}
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;
}
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(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));
XFree(p);
drawmenu();
}
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))))
eprintf("cannot realloc %u bytes:", size);
if((p = strchr(buf, '\n')))
*p = '\0';
if(!(items[i].text = strdup(buf)))
eprintf("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(dc, maxstr) : 0;
lines = MIN(lines, i);
}
void
run(void) {
XEvent ev;
while(!XNextEvent(dc->dpy, &ev)) {
if(XFilterEvent(&ev, win))
continue;
switch(ev.type) {
case Expose:
if(ev.xexpose.count == 0)
mapdc(dc, win, 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(dc->dpy, win);
break;
}
}
}
void
setup(void) {
int x, y, screen = DefaultScreen(dc->dpy);
Window root = RootWindow(dc->dpy, screen);
XSetWindowAttributes swa;
XIM xim;
#ifdef XINERAMA
int n;
XineramaScreenInfo *info;
#endif
normcol[ColBG] = getcolor(dc, normbgcolor);
normcol[ColFG] = getcolor(dc, normfgcolor);
selcol[ColBG] = getcolor(dc, selbgcolor);
selcol[ColFG] = getcolor(dc, selfgcolor);
outcol[ColBG] = getcolor(dc, outbgcolor);
outcol[ColFG] = getcolor(dc, outfgcolor);
clip = XInternAtom(dc->dpy, "CLIPBOARD", False);
utf8 = XInternAtom(dc->dpy, "UTF8_STRING", False);
/* calculate menu geometry */
bh = dc->font.height + 2;
lines = MAX(lines, 0);
mh = (lines + 1) * bh;
#ifdef XINERAMA
if((info = XineramaQueryScreens(dc->dpy, &n))) {
int a, j, di, i = 0, area = 0;
unsigned int du;
Window w, pw, dw, *dws;
XWindowAttributes wa;
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) {
area = a;
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;
XFree(info);
}
else
#endif
{
x = 0;
y = topbar ? 0 : DisplayHeight(dc->dpy, screen) - mh;
mw = DisplayWidth(dc->dpy, screen);
}
promptw = (prompt && *prompt) ? textw(dc, prompt) : 0;
inputw = MIN(inputw, mw/3);
match();
/* create menu window */
swa.override_redirect = True;
swa.background_pixel = normcol[ColBG];
swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
win = XCreateWindow(dc->dpy, root, x, y, mw, mh, 0,
DefaultDepth(dc->dpy, screen), CopyFromParent,
DefaultVisual(dc->dpy, screen),
CWOverrideRedirect | CWBackPixel | CWEventMask, &swa);
/* open input methods */
xim = XOpenIM(dc->dpy, NULL, NULL, NULL);
xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
XNClientWindow, win, XNFocusWindow, win, NULL);
XMapRaised(dc->dpy, win);
resizedc(dc, mw, mh);
drawmenu();
}
void
usage(void) {
fputs("usage: dmenu [-b] [-f] [-i] [-l lines] [-p prompt] [-fn font]\n"
" [-nb color] [-nf color] [-sb color] [-sf color] [-v]\n", stderr);
exit(EXIT_FAILURE);
}
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