+void
+drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
+ int x;
+ XGCValues gcv;
+ XRectangle r = { dc.x, dc.y, dc.w, dc.h };
+
+ gcv.foreground = col[invert ? ColBG : ColFG];
+ XChangeGC(dpy, dc.gc, GCForeground, &gcv);
+ x = (dc.font.ascent + dc.font.descent + 2) / 4;
+ r.x = dc.x + 1;
+ r.y = dc.y + 1;
+ if(filled) {
+ r.width = r.height = x + 1;
+ XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
+ }
+ else if(empty) {
+ r.width = r.height = x;
+ XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
+ }
+}
+
+void
+drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
+ int x, y, w, h;
+ unsigned int len, olen;
+ XRectangle r = { dc.x, dc.y, dc.w, dc.h };
+ char buf[256];
+
+ XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
+ XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
+ if(!text)
+ return;
+ olen = strlen(text);
+ len = MIN(olen, sizeof buf);
+ memcpy(buf, text, len);
+ w = 0;
+ h = dc.font.ascent + dc.font.descent;
+ y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
+ x = dc.x + (h / 2);
+ /* shorten text if necessary */
+ for(; len && (w = textnw(buf, len)) > dc.w - h; len--);
+ if(!len)
+ return;
+ if(len < olen) {
+ if(len > 1)
+ buf[len - 1] = '.';
+ if(len > 2)
+ buf[len - 2] = '.';
+ if(len > 3)
+ buf[len - 3] = '.';
+ }
+ XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
+ if(dc.font.set)
+ XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
+ else
+ XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
+}
+
+void *
+emallocz(unsigned int size) {
+ void *res = calloc(1, size);
+
+ if(!res)
+ eprint("fatal: could not malloc() %u bytes\n", size);
+ return res;
+}
+
+void
+enternotify(XEvent *e) {
+ Client *c;
+ XCrossingEvent *ev = &e->xcrossing;
+
+ if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
+ return;
+ if((c = getclient(ev->window)))
+ focus(c);
+ else
+ focus(NULL);
+}
+
+void
+eprint(const char *errstr, ...) {
+ va_list ap;
+
+ va_start(ap, errstr);
+ vfprintf(stderr, errstr, ap);
+ va_end(ap);
+ exit(EXIT_FAILURE);
+}
+
+void
+expose(XEvent *e) {
+ XExposeEvent *ev = &e->xexpose;
+
+ if(ev->count == 0 && (ev->window == barwin))
+ drawbar();
+}
+
+void
+focus(Client *c) {
+ if(!c || (c && !isvisible(c)))
+ for(c = stack; c && !isvisible(c); c = c->snext);
+ if(sel && sel != c) {
+ grabbuttons(sel, False);
+ XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
+ }
+ if(c) {
+ detachstack(c);
+ attachstack(c);
+ grabbuttons(c, True);
+ }
+ sel = c;
+ if(c) {
+ XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
+ XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
+ }
+ else
+ XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
+ drawbar();
+}
+
+void
+focusin(XEvent *e) { /* there are some broken focus acquiring clients */
+ XFocusChangeEvent *ev = &e->xfocus;
+
+ if(sel && ev->window != sel->win)
+ XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
+}
+
+void
+focusnext(const char *arg) {
+ Client *c;
+
+ if(!sel)
+ return;
+ for(c = sel->next; c && !isvisible(c); c = c->next);
+ if(!c)
+ for(c = clients; c && !isvisible(c); c = c->next);
+ if(c) {
+ focus(c);
+ restack();
+ }
+}
+
+void
+focusprev(const char *arg) {
+ Client *c;
+
+ if(!sel)
+ return;
+ for(c = sel->prev; c && !isvisible(c); c = c->prev);
+ if(!c) {
+ for(c = clients; c && c->next; c = c->next);
+ for(; c && !isvisible(c); c = c->prev);
+ }
+ if(c) {
+ focus(c);
+ restack();
+ }
+}
+
+Client *
+getclient(Window w) {
+ Client *c;
+
+ for(c = clients; c && c->win != w; c = c->next);
+ return c;
+}
+
+unsigned long
+getcolor(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;
+}
+
+long
+getstate(Window w) {
+ int format, status;
+ long result = -1;
+ unsigned char *p = NULL;
+ unsigned long n, extra;
+ Atom real;
+
+ status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
+ &real, &format, &n, &extra, (unsigned char **)&p);
+ if(status != Success)
+ return -1;
+ if(n != 0)
+ result = *p;
+ XFree(p);
+ return result;
+}
+
+Bool
+gettextprop(Window w, Atom atom, char *text, unsigned int size) {
+ char **list = NULL;
+ int n;
+ XTextProperty name;
+
+ if(!text || size == 0)
+ return False;
+ text[0] = '\0';
+ XGetTextProperty(dpy, w, &name, atom);
+ if(!name.nitems)
+ return False;
+ if(name.encoding == XA_STRING)
+ strncpy(text, (char *)name.value, size - 1);
+ else {
+ if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
+ && n > 0 && *list) {
+ strncpy(text, *list, size - 1);
+ XFreeStringList(list);
+ }
+ }
+ text[size - 1] = '\0';
+ XFree(name.value);
+ return True;
+}
+
+void
+grabbuttons(Client *c, Bool focused) {
+ int i, j;
+ unsigned int buttons[] = { Button1, Button2, Button3 };
+ unsigned int modifiers[] = { MODKEY, MODKEY|LockMask, MODKEY|numlockmask,
+ MODKEY|numlockmask|LockMask} ;
+
+ XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
+ if(focused)
+ for(i = 0; i < LENGTH(buttons); i++)
+ for(j = 0; j < LENGTH(modifiers); j++)
+ XGrabButton(dpy, buttons[i], modifiers[j], c->win, False,
+ BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
+ else
+ XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
+ BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
+}
+
+void
+grabkeys(void) {
+ unsigned int i, j;
+ KeyCode code;
+ XModifierKeymap *modmap;
+
+ /* 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);
+
+ XUngrabKey(dpy, AnyKey, AnyModifier, root);
+ for(i = 0; i < LENGTH(keys); i++) {
+ code = XKeysymToKeycode(dpy, keys[i].keysym);
+ XGrabKey(dpy, code, keys[i].mod, root, True,
+ GrabModeAsync, GrabModeAsync);
+ XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
+ GrabModeAsync, GrabModeAsync);
+ XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
+ GrabModeAsync, GrabModeAsync);
+ XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
+ GrabModeAsync, GrabModeAsync);
+ }