dmenu/dmenu.c

544 lines
12 KiB
C

/* See LICENSE file for copyright and license details. */
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.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 <dc.h>
#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))
typedef struct Item Item;
struct Item {
char *text;
Item *next; /* traverses all items */
Item *left, *right; /* traverses matching items */
};
static void appenditem(Item *item, Item **list, Item **last);
static void calcoffsets(void);
static void drawmenu(void);
static char *fstrstr(const char *s, const char *sub);
static void grabkeyboard(void);
static void insert(const char *s, ssize_t n);
static void keypress(XKeyEvent *ev);
static void match(void);
static size_t nextrune(int incr);
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 = 0;
static int lines = 0;
static int monitor = -1;
static int promptw;
static size_t cursor = 0;
static const char *font = NULL;
static const char *prompt = NULL;
static const char *normbgcolor = "#cccccc";
static const char *normfgcolor = "#000000";
static const char *selbgcolor = "#0066ff";
static const char *selfgcolor = "#ffffff";
static unsigned long normcol[ColLast];
static unsigned long selcol[ColLast];
static Atom utf8;
static Bool topbar = True;
static DC *dc;
static Item *items = NULL;
static Item *matches, *sel;
static Item *prev, *curr, *next;
static Window root, win;
static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
void
appenditem(Item *item, Item **list, Item **last) {
if(!*last)
*list = item;
else
(*last)->right = item;
item->left = *last;
item->right = NULL;
*last = item;
}
void
calcoffsets(void) {
unsigned int i, n;
if(lines > 0)
n = lines * bh;
else
n = mw - (promptw + inputw + dc_textw(dc, "<") + dc_textw(dc, ">"));
for(i = 0, next = curr; next; next = next->right)
if((i += (lines > 0) ? bh : MIN(dc_textw(dc, next->text), n)) > n)
break;
for(i = 0, prev = curr; prev && prev->left; prev = prev->left)
if((i += (lines > 0) ? bh : MIN(dc_textw(dc, prev->left->text), n)) > n)
break;
}
void
drawmenu(void) {
int curpos;
Item *item;
dc->x = 0;
dc->y = 0;
dc->h = bh;
dc_drawrect(dc, 0, 0, mw, mh, True, BG(dc, normcol));
if(prompt) {
dc->w = promptw;
dc_drawtext(dc, prompt, selcol);
dc->x = dc->w;
}
dc->w = (lines > 0 || !matches) ? mw - dc->x : inputw;
dc_drawtext(dc, text, normcol);
if((curpos = dc_textnw(dc, text, cursor) + dc->h/2 - 2) < dc->w)
dc_drawrect(dc, curpos, 2, 1, dc->h - 4, True, FG(dc, normcol));
if(lines > 0) {
dc->w = mw - dc->x;
for(item = curr; item != next; item = item->right) {
dc->y += dc->h;
dc_drawtext(dc, item->text, (item == sel) ? selcol : normcol);
}
}
else if(matches) {
dc->x += inputw;
dc->w = dc_textw(dc, "<");
if(curr->left)
dc_drawtext(dc, "<", normcol);
for(item = curr; item != next; item = item->right) {
dc->x += dc->w;
dc->w = MIN(dc_textw(dc, item->text), mw - dc->x - dc_textw(dc, ">"));
dc_drawtext(dc, item->text, (item == sel) ? selcol : normcol);
}
dc->w = dc_textw(dc, ">");
dc->x = mw - dc->w;
if(next)
dc_drawtext(dc, ">", normcol);
}
dc_map(dc, win, mw, mh);
}
char *
fstrstr(const char *s, const char *sub) {
size_t len;
for(len = strlen(sub); *s; s++)
if(!fstrncmp(s, sub, len))
return (char *)s;
return NULL;
}
void
grabkeyboard(void) {
int i;
for(i = 0; i < 1000; i++) {
if(!XGrabKeyboard(dc->dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime))
return;
usleep(1000);
}
eprintf("cannot grab keyboard\n");
}
void
insert(const char *s, ssize_t n) {
if(strlen(text) + n > sizeof text - 1)
return;
memmove(text + cursor + n, text + cursor, sizeof text - cursor - MAX(n, 0));
if(n > 0)
memcpy(text + cursor, s, n);
cursor += n;
match();
}
void
keypress(XKeyEvent *ev) {
char buf[32];
size_t len;
KeySym ksym;
len = strlen(text);
XLookupString(ev, buf, sizeof buf, &ksym, NULL);
if(ev->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_d:
ksym = XK_Delete;
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:
ksym = XK_Return;
break;
case XK_k: /* delete right */
text[cursor] = '\0';
match();
break;
case XK_n:
ksym = XK_Down;
break;
case XK_p:
ksym = XK_Up;
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;
}
}
switch(ksym) {
default:
if(!iscntrl(*buf))
insert(buf, strlen(buf));
break;
case XK_Delete:
if(cursor == len)
return;
cursor = nextrune(+1);
case XK_BackSpace:
if(cursor > 0)
insert(NULL, nextrune(-1) - cursor);
break;
case XK_End:
if(cursor < len) {
cursor = len;
break;
}
while(next) {
sel = curr = next;
calcoffsets();
}
while(sel && sel->right)
sel = sel->right;
break;
case XK_Escape:
exit(EXIT_FAILURE);
case XK_Home:
if(sel == matches) {
cursor = 0;
break;
}
sel = curr = matches;
calcoffsets();
break;
case XK_Insert: /* paste selection */
if(ev->state & ShiftMask)
XConvertSelection(dc->dpy, XA_PRIMARY, utf8, utf8, win, CurrentTime);
return;
case XK_Left:
if(cursor > 0 && (!sel || !sel->left || lines > 0)) {
cursor = nextrune(-1);
break;
}
else if(lines > 0)
return;
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:
fputs((sel && !(ev->state & ShiftMask)) ? sel->text : text, stdout);
fflush(stdout);
exit(EXIT_SUCCESS);
case XK_Right:
if(cursor < len) {
cursor = nextrune(+1);
break;
}
else if(lines > 0)
return;
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);
cursor = strlen(text);
match();
break;
}
drawmenu();
}
void
match(void) {
size_t len;
Item *item, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
len = strlen(text);
matches = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
for(item = items; item; item = item->next)
if(!fstrncmp(text, item->text, len + 1))
appenditem(item, &lexact, &exactend);
else if(!fstrncmp(text, item->text, len))
appenditem(item, &lprefix, &prefixend);
else if(fstrstr(item->text, text))
appenditem(item, &lsubstr, &substrend);
if(lexact) {
matches = lexact;
itemend = exactend;
}
if(lprefix) {
if(itemend) {
itemend->right = lprefix;
lprefix->left = itemend;
}
else
matches = lprefix;
itemend = prefixend;
}
if(lsubstr) {
if(itemend) {
itemend->right = lsubstr;
lsubstr->left = itemend;
}
else
matches = lsubstr;
}
curr = prev = next = sel = matches;
calcoffsets();
}
size_t
nextrune(int incr) {
size_t n, len;
len = strlen(text);
for(n = cursor + incr; n >= 0 && n < len && (text[n] & 0xc0) == 0x80; n += incr);
return n;
}
void
paste(void) {
char *p, *q;
int di;
unsigned long dl;
Atom da;
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 : strlen(p));
XFree(p);
drawmenu();
}
void
readstdin(void) {
char buf[sizeof text], *p;
Item *item, **end;
for(end = &items; fgets(buf, sizeof buf, stdin); *end = item, end = &item->next) {
if((p = strchr(buf, '\n')))
*p = '\0';
if(!(item = malloc(sizeof *item)))
eprintf("cannot malloc %u bytes\n", sizeof *item);
if(!(item->text = strdup(buf)))
eprintf("cannot strdup %u bytes\n", strlen(buf)+1);
item->next = item->left = item->right = NULL;
inputw = MAX(inputw, dc_textw(dc, item->text));
}
}
void
run(void) {
XEvent ev;
while(!XNextEvent(dc->dpy, &ev))
switch(ev.type) {
case Expose:
if(ev.xexpose.count == 0)
drawmenu();
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;
XSetWindowAttributes wa;
#ifdef XINERAMA
int n;
XineramaScreenInfo *info;
#endif
screen = DefaultScreen(dc->dpy);
root = RootWindow(dc->dpy, screen);
utf8 = XInternAtom(dc->dpy, "UTF8_STRING", False);
normcol[ColBG] = dc_color(dc, normbgcolor);
normcol[ColFG] = dc_color(dc, normfgcolor);
selcol[ColBG] = dc_color(dc, selbgcolor);
selcol[ColFG] = dc_color(dc, selfgcolor);
/* menu geometry */
bh = dc->font.height + 2;
lines = MAX(lines, 0);
mh = (lines + 1) * bh;
#ifdef XINERAMA
if((info = XineramaQueryScreens(dc->dpy, &n))) {
int i, di;
unsigned int du;
Window dw;
XQueryPointer(dc->dpy, root, &dw, &dw, &x, &y, &di, &di, &du);
for(i = 0; i < n; i++)
if((monitor == info[i].screen_number)
|| (monitor < 0 && INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height)))
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);
}
/* menu window */
wa.override_redirect = True;
wa.background_pixmap = ParentRelative;
wa.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 | CWBackPixmap | CWEventMask, &wa);
grabkeyboard();
dc_resize(dc, mw, mh);
inputw = MIN(inputw, mw/3);
promptw = prompt ? dc_textw(dc, prompt) : 0;
XMapRaised(dc->dpy, win);
text[0] = '\0';
match();
}
void
usage(void) {
fputs("usage: dmenu [-b] [-i] [-l lines] [-p prompt] [-fn font] [-nb color]\n"
" [-nf color] [-sb color] [-sf color] [-v]\n", stderr);
exit(EXIT_FAILURE);
}
int
main(int argc, char *argv[]) {
int i;
progname = "dmenu";
for(i = 1; i < argc; i++)
/* single flags */
if(!strcmp(argv[i], "-v")) {
fputs("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n", stdout);
exit(EXIT_SUCCESS);
}
else if(!strcmp(argv[i], "-b"))
topbar = False;
else if(!strcmp(argv[i], "-i"))
fstrncmp = strncasecmp;
else if(i == argc-1)
usage();
/* double flags */
else if(!strcmp(argv[i], "-l"))
lines = atoi(argv[++i]);
else if(!strcmp(argv[i], "-m"))
monitor = atoi(argv[++i]);
else if(!strcmp(argv[i], "-p"))
prompt = argv[++i];
else if(!strcmp(argv[i], "-fn"))
font = argv[++i];
else if(!strcmp(argv[i], "-nb"))
normbgcolor = argv[++i];
else if(!strcmp(argv[i], "-nf"))
normfgcolor = argv[++i];
else if(!strcmp(argv[i], "-sb"))
selbgcolor = argv[++i];
else if(!strcmp(argv[i], "-sf"))
selfgcolor = argv[++i];
else
usage();
dc = dc_init();
dc_font(dc, font);
readstdin();
setup();
run();
return EXIT_FAILURE; /* should not reach */
}