dmenu for lunch applications in dwm
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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 <unistd.h>
#include <X11/keysym.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#ifdef XINERAMA
#include <X11/extensions/Xinerama.h>
#endif
#include <draw.h>
/* macros */
#define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define IS_UTF8_1ST_CHAR(c) ((((c) & 0xc0) == 0xc0) || !((c) & 0x80))
typedef struct Item Item;
struct Item {
char *text;
Item *next; /* traverses all items */
Item *left, *right; /* traverses items matching current search pattern */
};
/* forward declarations */
static void appenditem(Item *i, Item **list, Item **last);
static void calcoffsetsh(void);
static void calcoffsetsv(void);
static char *cistrstr(const char *s, const char *sub);
static void cleanup(void);
static void dinput(void);
static void drawmenu(void);
static void drawmenuh(void);
static void drawmenuv(void);
static void grabkeyboard(void);
static void kpress(XKeyEvent *e);
static void match(char *pattern);
static void readstdin(void);
static void run(void);
static void setup(void);
#include "config.h"
/* variables */
static char **argp = NULL;
static char *maxname = NULL;
static char *prompt = NULL;
static char text[4096];
static int cmdw = 0;
static int promptw = 0;
static int screen;
static unsigned int lines = 0;
static unsigned int numlockmask = 0;
static unsigned int mw, mh;
static unsigned long normcol[ColLast];
static unsigned long selcol[ColLast];
static Bool topbar = True;
static DC dc;
static Display *dpy;
static Item *allitems = NULL; /* first of all items */
static Item *item = NULL; /* first of pattern matching items */
static Item *sel = NULL;
static Item *next = NULL;
static Item *prev = NULL;
static Item *curr = NULL;
static Window win, root;
static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
static char *(*fstrstr)(const char *, const char *) = strstr;
static void (*calcoffsets)(void) = calcoffsetsh;
void
appenditem(Item *i, Item **list, Item **last) {
if(!(*last))
*list = i;
else
(*last)->right = i;
i->left = *last;
i->right = NULL;
*last = i;
}
void
calcoffsetsh(void) {
unsigned int x;
x = promptw + cmdw + (2 * spaceitem);
for(next = curr; next; next = next->right)
if((x += MIN(textw(&dc, next->text), mw / 3)) > mw)
break;
x = promptw + cmdw + (2 * spaceitem);
for(prev = curr; prev && prev->left; prev = prev->left)
if((x += MIN(textw(&dc, prev->left->text), mw / 3)) > mw)
break;
}
void
calcoffsetsv(void) {
unsigned int i;
next = prev = curr;
for(i = 0; i < lines && next; i++)
next = next->right;
mh = (dc.font.height + 2) * (i + 1);
for(i = 0; i < lines && prev && prev->left; i++)
prev = prev->left;
}
char *
cistrstr(const char *s, const char *sub) {
int c, csub;
unsigned int len;
if(!sub)
return (char *)s;
if((c = tolower(*sub++)) != '\0') {
len = strlen(sub);
do {
do {
if((csub = *s++) == '\0')
return NULL;
}
while(tolower(csub) != c);
}
while(strncasecmp(s, sub, len) != 0);
s--;
}
return (char *)s;
}
void
cleanup(void) {
Item *itm;
while(allitems) {
itm = allitems->next;
free(allitems->text);
free(allitems);
allitems = itm;
}
cleanupdraw(&dc);
XDestroyWindow(dpy, win);
XUngrabKeyboard(dpy, CurrentTime);
XCloseDisplay(dpy);
}
void
dinput(void) {
cleanup();
argp[0] = "dinput";
argp[1] = text;
execvp("dinput", argp);
eprint("cannot exec dinput\n");
}
void
drawmenu(void) {
dc.x = 0;
dc.y = 0;
dc.w = mw;
dc.h = mh;
drawtext(&dc, NULL, normcol, False);
dc.h = dc.font.height + 2;
dc.y = topbar ? 0 : mh - dc.h;
/* print prompt? */
if(prompt) {
dc.w = promptw;
drawtext(&dc, prompt, selcol, False);
dc.x += dc.w;
}
dc.w = mw - dc.x;
/* print command */
if(cmdw && item && lines == 0)
dc.w = cmdw;
drawtext(&dc, *text ? text : NULL, normcol, False);
if(lines > 0)
drawmenuv();
else if(curr)
drawmenuh();
XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
}
void
drawmenuh(void) {
Item *i;
dc.x += cmdw;
dc.w = spaceitem;
drawtext(&dc, curr->left ? "<" : NULL, normcol, False);
dc.x += dc.w;
for(i = curr; i != next; i = i->right) {
dc.w = MIN(textw(&dc, i->text), mw / 3);
drawtext(&dc, i->text, (sel == i) ? selcol : normcol, False);
dc.x += dc.w;
}
dc.w = spaceitem;
dc.x = mw - dc.w;
drawtext(&dc, next ? ">" : NULL, normcol, False);
}
void
drawmenuv(void) {
Item *i;
XWindowAttributes wa;
dc.y = topbar ? dc.h : 0;
dc.w = mw - dc.x;
for(i = curr; i != next; i = i->right) {
drawtext(&dc, i->text, (sel == i) ? selcol : normcol, False);
dc.y += dc.h;
}
if(!XGetWindowAttributes(dpy, win, &wa))
eprint("cannot get window attributes");
XMoveResizeWindow(dpy, win, wa.x, wa.y + (topbar ? 0 : wa.height - mh), mw, mh);
}
void
grabkeyboard(void) {
unsigned int len;
for(len = 1000; len; len--) {
if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
== GrabSuccess)
break;
usleep(1000);
}
if(!len)
exit(EXIT_FAILURE);
}
void
kpress(XKeyEvent *e) {
char buf[sizeof text];
int num;
unsigned int i, len;
KeySym ksym;
len = strlen(text);
num = XLookupString(e, buf, sizeof buf, &ksym, NULL);
if(ksym == XK_KP_Enter)
ksym = XK_Return;
else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
ksym = (ksym - XK_KP_0) + XK_0;
else if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
|| IsMiscFunctionKey(ksym) || IsPFKey(ksym)
|| IsPrivateKeypadKey(ksym))
return;
/* first check if a control mask is omitted */
if(e->state & ControlMask) {
switch(tolower(ksym)) {
default:
return;
case XK_a:
ksym = XK_Home;
break;
case XK_b:
ksym = XK_Left;
break;
case XK_c:
ksym = XK_Escape;
break;
case XK_e:
ksym = XK_End;
break;
case XK_f:
ksym = XK_Right;
break;
case XK_h:
ksym = XK_BackSpace;
break;
case XK_i:
ksym = XK_Tab;
break;
case XK_j:
case XK_m:
ksym = XK_Return;
break;
case XK_n:
ksym = XK_Down;
break;
case XK_p:
ksym = XK_Up;
break;
case XK_u:
text[0] = '\0';
match(text);
break;
case XK_w:
if(len == 0)
return;
i = len;
while(i-- > 0 && text[i] == ' ');
while(i-- > 0 && text[i] != ' ');
text[++i] = '\0';
match(text);
break;
}
}
switch(ksym) {
default:
num = MIN(num, sizeof text);
if(num && !iscntrl((int) buf[0])) {
memcpy(text + len, buf, num + 1);
len += num;
match(text);
}
break;
case XK_BackSpace:
if(len == 0)
return;
for(i = 1; len - i > 0 && !IS_UTF8_1ST_CHAR(text[len - i]); i++);
len -= i;
text[len] = '\0';
match(text);
break;
case XK_End:
while(next) {
sel = curr = next;
calcoffsets();
}
while(sel && sel->right)
sel = sel->right;
break;
case XK_Escape:
exit(EXIT_FAILURE);
case XK_Home:
sel = curr = item;
calcoffsets();
break;
case XK_Left:
case XK_Up:
if(!sel || !sel->left)
return;
sel = sel->left;
if(sel->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:
if(e->state & ShiftMask)
dinput();
fprintf(stdout, "%s", sel ? sel->text : text);
fflush(stdout);
exit(EXIT_SUCCESS);
case XK_Right:
case XK_Down:
if(!sel || !sel->right)
return;
sel = sel->right;
if(sel == next) {
curr = next;
calcoffsets();
}
break;
case XK_Tab:
if(sel)
strncpy(text, sel->text, sizeof text);
dinput();
break;
}
drawmenu();
}
void
match(char *pattern) {
unsigned int plen;
Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
if(!pattern)
return;
plen = strlen(pattern);
item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
for(i = allitems; i; i = i->next)
if(!fstrncmp(pattern, i->text, plen + 1))
appenditem(i, &lexact, &exactend);
else if(!fstrncmp(pattern, i->text, plen))
appenditem(i, &lprefix, &prefixend);
else if(fstrstr(i->text, pattern))
appenditem(i, &lsubstr, &substrend);
if(lexact) {
item = lexact;
itemend = exactend;
}
if(lprefix) {
if(itemend) {
itemend->right = lprefix;
lprefix->left = itemend;
}
else
item = lprefix;
itemend = prefixend;
}
if(lsubstr) {
if(itemend) {
itemend->right = lsubstr;
lsubstr->left = itemend;
}
else
item = lsubstr;
}
curr = prev = next = sel = item;
calcoffsets();
}
void
readstdin(void) {
char *p, buf[sizeof text];
unsigned int len = 0, max = 0;
Item *i, *new;
i = NULL;
while(fgets(buf, sizeof buf, stdin)) {
len = strlen(buf);
if(buf[len-1] == '\n')
buf[--len] = '\0';
if(!(p = strdup(buf)))
eprint("cannot strdup %u bytes\n", len);
if((max = MAX(max, len)) == len)
maxname = p;
if(!(new = malloc(sizeof *new)))
eprint("cannot malloc %u bytes\n", sizeof *new);
new->next = new->left = new->right = NULL;
new->text = p;
if(!i)
allitems = new;
else
i->next = new;
i = new;
}
}
void
run(void) {
XEvent ev;
/* main event loop */
XSync(dpy, False);
while(!XNextEvent(dpy, &ev))
switch(ev.type) {
case KeyPress:
kpress(&ev.xkey);
break;
case Expose:
if(ev.xexpose.count == 0)
drawmenu();
break;
case VisibilityNotify:
if(ev.xvisibility.state != VisibilityUnobscured)
XRaiseWindow(dpy, win);
break;
}
exit(EXIT_FAILURE);
}
void
setup(void) {
int i, j, x, y;
#if XINERAMA
int n;
XineramaScreenInfo *info = NULL;
#endif
XModifierKeymap *modmap;
XSetWindowAttributes wa;
/* init modifier map */
modmap = XGetModifierMapping(dpy);
for(i = 0; i < 8; i++)
for(j = 0; j < modmap->max_keypermod; j++) {
if(modmap->modifiermap[i * modmap->max_keypermod + j]
== XKeysymToKeycode(dpy, XK_Num_Lock))
numlockmask = (1 << i);
}
XFreeModifiermap(modmap);
dc.dpy = dpy;
normcol[ColBG] = getcolor(&dc, normbgcolor);
normcol[ColFG] = getcolor(&dc, normfgcolor);
selcol[ColBG] = getcolor(&dc, selbgcolor);
selcol[ColFG] = getcolor(&dc, selfgcolor);
initfont(&dc, font);
/* menu window */
wa.override_redirect = True;
wa.background_pixmap = ParentRelative;
wa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
/* menu window geometry */
mh = (dc.font.height + 2) * (lines + 1);
#if XINERAMA
if(XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
i = 0;
if(n > 1) {
int di;
unsigned int dui;
Window dummy;
if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
for(i = 0; i < n; i++)
if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
break;
}
x = info[i].x_org;
y = topbar ? info[i].y_org : info[i].y_org + info[i].height - mh;
mw = info[i].width;
XFree(info);
}
else
#endif
{
x = 0;
y = topbar ? 0 : mh - DisplayHeight(dpy, screen);
mw = DisplayWidth(dpy, screen);
}
win = XCreateWindow(dpy, root, x, y, mw, mh, 0,
DefaultDepth(dpy, screen), CopyFromParent,
DefaultVisual(dpy, screen),
CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
setupdraw(&dc, win);
if(maxname)
cmdw = MIN(textw(&dc, maxname), mw / 3);
if(prompt)
promptw = MIN(textw(&dc, prompt), mw / 5);
text[0] = '\0';
match(text);
XMapRaised(dpy, win);
}
int
main(int argc, char *argv[]) {
unsigned int i;
/* command line args */
progname = "dmenu";
for(i = 1; i < argc; i++)
if(!strcmp(argv[i], "-i")) {
fstrncmp = strncasecmp;
fstrstr = cistrstr;
}
else if(!strcmp(argv[i], "-b"))
topbar = False;
else if(!strcmp(argv[i], "-l")) {
if(++i < argc) lines = atoi(argv[i]);
if(lines > 0)
calcoffsets = calcoffsetsv;
}
else if(!strcmp(argv[i], "-fn")) {
if(++i < argc) font = argv[i];
}
else if(!strcmp(argv[i], "-nb")) {
if(++i < argc) normbgcolor = argv[i];
}
else if(!strcmp(argv[i], "-nf")) {
if(++i < argc) normfgcolor = argv[i];
}
else if(!strcmp(argv[i], "-p")) {
if(++i < argc) prompt = argv[i];
}
else if(!strcmp(argv[i], "-sb")) {
if(++i < argc) selbgcolor = argv[i];
}
else if(!strcmp(argv[i], "-sf")) {
if(++i < argc) selfgcolor = argv[i];
}
else if(!strcmp(argv[i], "-v")) {
printf("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n");
exit(EXIT_SUCCESS);
}
else {
fputs("usage: dmenu [-i] [-b] [-l <lines>] [-fn <font>] [-nb <color>]\n"
" [-nf <color>] [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n", stderr);
exit(EXIT_FAILURE);
}
if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
fprintf(stderr, "dmenu: warning: no locale support\n");
if(!(dpy = XOpenDisplay(NULL)))
eprint("cannot open display\n");
if(atexit(&cleanup) != 0)
eprint("cannot register cleanup\n");
screen = DefaultScreen(dpy);
root = RootWindow(dpy, screen);
if(!(argp = malloc(sizeof *argp * (argc+2))))
eprint("cannot malloc %u bytes\n", sizeof *argp * (argc+2));
memcpy(argp + 2, argv + 1, sizeof *argp * argc);
readstdin();
grabkeyboard();
setup();
run();
return 0;
}