dmenu/main.c

556 lines
11 KiB
C

/* © 2006-2007 Anselm R. Garbe <garbeam at gmail dot com>
* © 2006-2007 Sander van Dijk <a dot h dot vandijk at gmail dot com>
* See LICENSE file for license details. */
#include "dmenu.h"
#include <ctype.h>
#include <locale.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <X11/Xutil.h>
#include <X11/keysym.h>
#define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
typedef struct Item Item;
struct Item {
Item *next; /* traverses all items */
Item *left, *right; /* traverses items matching current search pattern */
char *text;
};
/* static */
static char text[4096];
static char *prompt = NULL;
static int mw, mh;
static int ret = 0;
static int nitem = 0;
static unsigned int cmdw = 0;
static unsigned int promptw = 0;
static unsigned int numlockmask = 0;
static Bool running = True;
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 root;
static Window win;
static void
calcoffsets(void) {
unsigned int tw, w;
if(!curr)
return;
w = promptw + cmdw + 2 * SPACE;
for(next = curr; next; next=next->right) {
tw = textw(next->text);
if(tw > mw / 3)
tw = mw / 3;
w += tw;
if(w > mw)
break;
}
w = promptw + cmdw + 2 * SPACE;
for(prev = curr; prev && prev->left; prev=prev->left) {
tw = textw(prev->left->text);
if(tw > mw / 3)
tw = mw / 3;
w += tw;
if(w > mw)
break;
}
}
static void
drawmenu(void) {
Item *i;
dc.x = 0;
dc.y = 0;
dc.w = mw;
dc.h = mh;
drawtext(NULL, dc.norm);
/* print prompt? */
if(promptw) {
dc.w = promptw;
drawtext(prompt, dc.sel);
}
dc.x += promptw;
dc.w = mw - promptw;
/* print command */
if(cmdw && item)
dc.w = cmdw;
drawtext(text[0] ? text : NULL, dc.norm);
dc.x += cmdw;
if(curr) {
dc.w = SPACE;
drawtext((curr && curr->left) ? "<" : NULL, dc.norm);
dc.x += dc.w;
/* determine maximum items */
for(i = curr; i != next; i=i->right) {
dc.w = textw(i->text);
if(dc.w > mw / 3)
dc.w = mw / 3;
drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
dc.x += dc.w;
}
dc.x = mw - SPACE;
dc.w = SPACE;
drawtext(next ? ">" : NULL, dc.norm);
}
XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
XFlush(dpy);
}
static Bool
grabkeyboard(void) {
unsigned int len;
for(len = 1000; len; len--) {
if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
== GrabSuccess)
break;
usleep(1000);
}
return len > 0;
}
static unsigned long
initcolor(const char *colstr) {
Colormap cmap = DefaultColormap(dpy, screen);
XColor color;
if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
eprint("error, cannot allocate color '%s'\n", colstr);
return color.pixel;
}
static void
initfont(const char *fontstr) {
char *def, **missing;
int i, n;
missing = NULL;
if(dc.font.set)
XFreeFontSet(dpy, dc.font.set);
dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
if(missing)
XFreeStringList(missing);
if(dc.font.set) {
XFontSetExtents *font_extents;
XFontStruct **xfonts;
char **font_names;
dc.font.ascent = dc.font.descent = 0;
font_extents = XExtentsOfFontSet(dc.font.set);
n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
if(dc.font.ascent < (*xfonts)->ascent)
dc.font.ascent = (*xfonts)->ascent;
if(dc.font.descent < (*xfonts)->descent)
dc.font.descent = (*xfonts)->descent;
xfonts++;
}
}
else {
if(dc.font.xfont)
XFreeFont(dpy, dc.font.xfont);
dc.font.xfont = NULL;
if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr)))
eprint("error, cannot load font: '%s'\n", fontstr);
dc.font.ascent = dc.font.xfont->ascent;
dc.font.descent = dc.font.xfont->descent;
}
dc.font.height = dc.font.ascent + dc.font.descent;
}
static void
match(char *pattern) {
unsigned int plen;
Item *i, *j;
if(!pattern)
return;
plen = strlen(pattern);
item = j = NULL;
nitem = 0;
for(i = allitems; i; i=i->next)
if(!plen || !strncmp(pattern, i->text, plen)) {
if(!j)
item = i;
else
j->right = i;
i->left = j;
i->right = NULL;
j = i;
nitem++;
}
for(i = allitems; i; i=i->next)
if(plen && strncmp(pattern, i->text, plen)
&& strstr(i->text, pattern)) {
if(!j)
item = i;
else
j->right = i;
i->left = j;
i->right = NULL;
j = i;
nitem++;
}
curr = prev = next = sel = item;
calcoffsets();
}
static void
kpress(XKeyEvent * e) {
char buf[32];
int i, num;
unsigned int len;
KeySym ksym;
len = strlen(text);
buf[0] = 0;
num = XLookupString(e, buf, sizeof buf, &ksym, 0);
if(IsKeypadKey(ksym)) {
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;
}
}
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 (ksym) {
default: /* ignore other control sequences */
return;
case XK_bracketleft:
ksym = XK_Escape;
break;
case XK_h:
case XK_H:
ksym = XK_BackSpace;
break;
case XK_i:
case XK_I:
ksym = XK_Tab;
break;
case XK_j:
case XK_J:
ksym = XK_Return;
break;
case XK_u:
case XK_U:
text[0] = 0;
match(text);
drawmenu();
return;
case XK_w:
case XK_W:
if(len) {
i = len - 1;
while(i >= 0 && text[i] == ' ')
text[i--] = 0;
while(i >= 0 && text[i] != ' ')
text[i--] = 0;
match(text);
drawmenu();
}
return;
}
}
if(CLEANMASK(e->state) & Mod1Mask) {
switch(ksym) {
default: return;
case XK_h:
ksym = XK_Left;
break;
case XK_l:
ksym = XK_Right;
break;
case XK_j:
ksym = XK_Next;
break;
case XK_k:
ksym = XK_Prior;
break;
case XK_g:
ksym = XK_Home;
break;
case XK_G:
ksym = XK_End;
break;
}
}
switch(ksym) {
default:
if(num && !iscntrl((int) buf[0])) {
buf[num] = 0;
if(len > 0)
strncat(text, buf, sizeof text);
else
strncpy(text, buf, sizeof text);
match(text);
}
break;
case XK_BackSpace:
if(len) {
text[--len] = 0;
match(text);
}
break;
case XK_End:
if(!item)
return;
while(next) {
sel = curr = next;
calcoffsets();
}
while(sel && sel->right)
sel = sel->right;
break;
case XK_Escape:
ret = 1;
running = False;
break;
case XK_Home:
if(!item)
return;
sel = curr = item;
calcoffsets();
break;
case XK_Left:
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) && text)
fprintf(stdout, "%s", text);
else if(sel)
fprintf(stdout, "%s", sel->text);
else if(text)
fprintf(stdout, "%s", text);
fflush(stdout);
running = False;
break;
case XK_Right:
if(!(sel && sel->right))
return;
sel=sel->right;
if(sel == next) {
curr = next;
calcoffsets();
}
break;
case XK_Tab:
if(!sel)
return;
strncpy(text, sel->text, sizeof text);
match(text);
break;
}
drawmenu();
}
static char *
readstdin(void) {
static char *maxname = NULL;
char *p, buf[1024];
unsigned int len = 0, max = 0;
Item *i, *new;
i = 0;
while(fgets(buf, sizeof buf, stdin)) {
len = strlen(buf);
if (buf[len - 1] == '\n')
buf[len - 1] = 0;
p = estrdup(buf);
if(max < len) {
maxname = p;
max = len;
}
new = emalloc(sizeof(Item));
new->next = new->left = new->right = NULL;
new->text = p;
if(!i)
allitems = new;
else
i->next = new;
i = new;
}
return maxname;
}
static void
usage(void) {
eprint("usage: dmenu [-b] [-fn <font>] [-nb <color>] [-nf <color>]\n"
" [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
}
/* extern */
int screen;
Display *dpy;
DC dc = {0};
int
main(int argc, char *argv[]) {
Bool bottom = False;
char *font = FONT;
char *maxname;
char *normbg = NORMBGCOLOR;
char *normfg = NORMFGCOLOR;
char *selbg = SELBGCOLOR;
char *selfg = SELFGCOLOR;
int i, j;
Item *itm;
XEvent ev;
XModifierKeymap *modmap;
XSetWindowAttributes wa;
/* command line args */
for(i = 1; i < argc; i++)
if(!strncmp(argv[i], "-b", 3)) {
bottom = True;
}
else if(!strncmp(argv[i], "-fn", 4)) {
if(++i < argc) font = argv[i];
}
else if(!strncmp(argv[i], "-nb", 4)) {
if(++i < argc) normbg = argv[i];
}
else if(!strncmp(argv[i], "-nf", 4)) {
if(++i < argc) normfg = argv[i];
}
else if(!strncmp(argv[i], "-p", 3)) {
if(++i < argc) prompt = argv[i];
}
else if(!strncmp(argv[i], "-sb", 4)) {
if(++i < argc) selbg = argv[i];
}
else if(!strncmp(argv[i], "-sf", 4)) {
if(++i < argc) selfg = argv[i];
}
else if(!strncmp(argv[i], "-v", 3))
eprint("dmenu-"VERSION", © 2006-2007 Anselm R. Garbe, Sander van Dijk\n");
else
usage();
setlocale(LC_CTYPE, "");
dpy = XOpenDisplay(0);
if(!dpy)
eprint("dmenu: cannot open display\n");
screen = DefaultScreen(dpy);
root = RootWindow(dpy, screen);
if(isatty(STDIN_FILENO)) {
maxname = readstdin();
running = grabkeyboard();
}
else { /* prevent keypress loss */
running = grabkeyboard();
maxname = readstdin();
}
/* 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);
/* style */
dc.norm[ColBG] = initcolor(normbg);
dc.norm[ColFG] = initcolor(normfg);
dc.sel[ColBG] = initcolor(selbg);
dc.sel[ColFG] = initcolor(selfg);
initfont(font);
/* menu window */
wa.override_redirect = 1;
wa.background_pixmap = ParentRelative;
wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask;
mw = DisplayWidth(dpy, screen);
mh = dc.font.height + 2;
win = XCreateWindow(dpy, root, 0,
bottom ? DisplayHeight(dpy, screen) - mh : 0, mw, mh, 0,
DefaultDepth(dpy, screen), CopyFromParent,
DefaultVisual(dpy, screen),
CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
/* pixmap */
dc.drawable = XCreatePixmap(dpy, root, mw, mh, DefaultDepth(dpy, screen));
dc.gc = XCreateGC(dpy, root, 0, 0);
XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
if(!dc.font.set)
XSetFont(dpy, dc.gc, dc.font.xfont->fid);
if(maxname)
cmdw = textw(maxname);
if(cmdw > mw / 3)
cmdw = mw / 3;
if(prompt)
promptw = textw(prompt);
if(promptw > mw / 5)
promptw = mw / 5;
text[0] = 0;
match(text);
XMapRaised(dpy, win);
drawmenu();
XSync(dpy, False);
/* main event loop */
while(running && !XNextEvent(dpy, &ev))
switch (ev.type) {
default: /* ignore all crap */
break;
case KeyPress:
kpress(&ev.xkey);
break;
case Expose:
if(ev.xexpose.count == 0)
drawmenu();
break;
}
/* cleanup */
while(allitems) {
itm = allitems->next;
free(allitems->text);
free(allitems);
allitems = itm;
}
if(dc.font.set)
XFreeFontSet(dpy, dc.font.set);
else
XFreeFont(dpy, dc.font.xfont);
XFreePixmap(dpy, dc.drawable);
XFreeGC(dpy, dc.gc);
XDestroyWindow(dpy, win);
XUngrabKeyboard(dpy, CurrentTime);
XCloseDisplay(dpy);
return ret;
}