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[dwm.git] / client.c
diff --git a/client.c b/client.c
index 522a425..fdb973c 100644 (file)
--- a/client.c
+++ b/client.c
@@ -1,316 +1,350 @@
-/*
- * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
+/* (C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
  * See LICENSE file for license details.
  */
 #include "dwm.h"
  * See LICENSE file for license details.
  */
 #include "dwm.h"
-
 #include <stdlib.h>
 #include <string.h>
 #include <X11/Xatom.h>
 #include <X11/Xutil.h>
 
 #include <stdlib.h>
 #include <string.h>
 #include <X11/Xatom.h>
 #include <X11/Xutil.h>
 
-/* static functions */
+/* static */
+
+static void
+attachstack(Client *c) {
+       c->snext = stack;
+       stack = c;
+}
+
+static void
+detachstack(Client *c) {
+       Client **tc;
+
+       for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
+       *tc = c->snext;
+}
 
 static void
 
 static void
-resizetitle(Client *c)
-{
-       int i;
-
-       c->tw = 0;
-       for(i = 0; i < TLast; i++)
-               if(c->tags[i])
-                       c->tw += textw(c->tags[i]);
-       c->tw += textw(c->name);
-       if(c->tw > c->w)
-               c->tw = c->w + 2;
-       c->tx = c->x + c->w - c->tw + 2;
-       c->ty = c->y;
-       XMoveResizeWindow(dpy, c->title, c->tx, c->ty, c->tw, c->th);
+grabbuttons(Client *c, Bool focused) {
+       XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
+
+       if(focused) {
+               XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
+                               GrabModeAsync, GrabModeSync, None, None);
+               XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
+                               GrabModeAsync, GrabModeSync, None, None);
+               XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
+                               GrabModeAsync, GrabModeSync, None, None);
+               XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
+                               GrabModeAsync, GrabModeSync, None, None);
+
+               XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
+                               GrabModeAsync, GrabModeSync, None, None);
+               XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
+                               GrabModeAsync, GrabModeSync, None, None);
+               XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
+                               GrabModeAsync, GrabModeSync, None, None);
+               XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
+                               GrabModeAsync, GrabModeSync, None, None);
+
+               XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
+                               GrabModeAsync, GrabModeSync, None, None);
+               XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
+                               GrabModeAsync, GrabModeSync, None, None);
+               XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
+                               GrabModeAsync, GrabModeSync, None, None);
+               XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
+                               GrabModeAsync, GrabModeSync, None, None);
+       }
+       else
+               XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
+                               GrabModeAsync, GrabModeSync, None, None);
+}
+
+static Bool
+isprotodel(Client *c) {
+       int i, n;
+       Atom *protocols;
+       Bool ret = False;
+
+       if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
+               for(i = 0; !ret && i < n; i++)
+                       if(protocols[i] == wmatom[WMDelete])
+                               ret = True;
+               XFree(protocols);
+       }
+       return ret;
+}
+
+static void
+setclientstate(Client *c, long state) {
+       long data[] = {state, None};
+
+       XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
+                       PropModeReplace, (unsigned char *)data, 2);
+}
+
+static void
+togglemax(Client *c) {
+       XEvent ev;
+
+       if(c->isfixed)
+               return;
+       if((c->ismax = !c->ismax)) {
+               c->rx = c->x;
+               c->ry = c->y;
+               c->rw = c->w;
+               c->rh = c->h;
+               resize(c, wax, way, waw - 2 * BORDERPX, wah - 2 * BORDERPX, True);
+       }
+       else
+               resize(c, c->rx, c->ry, c->rw, c->rh, True);
+       while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 }
 
 static int
 }
 
 static int
-xerrordummy(Display *dsply, XErrorEvent *ee)
-{
+xerrordummy(Display *dsply, XErrorEvent *ee) {
        return 0;
 }
 
        return 0;
 }
 
-/* extern functions */
+/* extern */
 
 void
 
 void
-ban(Client *c)
-{
-       XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
-       XMoveWindow(dpy, c->title, c->tx + 2 * sw, c->ty);
+attach(Client *c) {
+       if(clients)
+               clients->prev = c;
+       c->next = clients;
+       clients = c;
 }
 
 void
 }
 
 void
-focus(Client *c)
-{
-       Client *old = sel;
-       XEvent ev;
+configure(Client *c) {
+       XConfigureEvent ce;
+
+       ce.type = ConfigureNotify;
+       ce.display = dpy;
+       ce.event = c->win;
+       ce.window = c->win;
+       ce.x = c->x;
+       ce.y = c->y;
+       ce.width = c->w;
+       ce.height = c->h;
+       ce.border_width = c->border;
+       ce.above = None;
+       ce.override_redirect = False;
+       XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
+}
 
 
-       sel = c;
-       if(old && old != c)
-               drawtitle(old);
-       drawtitle(c);
-       XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
-       XSync(dpy, False);
-       while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
+void
+detach(Client *c) {
+       if(c->prev)
+               c->prev->next = c->next;
+       if(c->next)
+               c->next->prev = c->prev;
+       if(c == clients)
+               clients = c->next;
+       c->next = c->prev = NULL;
 }
 
 void
 }
 
 void
-focusnext(Arg *arg)
-{
-       Client *c;
-   
-       if(!sel)
+focus(Client *c) {
+       if(c && !isvisible(c))
                return;
                return;
-
-       if(!(c = getnext(sel->next)))
-               c = getnext(clients);
+       if(sel && sel != c) {
+               grabbuttons(sel, False);
+               XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
+       }
        if(c) {
        if(c) {
-               higher(c);
-               c->revert = sel;
-               focus(c);
+               detachstack(c);
+               attachstack(c);
+               grabbuttons(c, True);
        }
        }
+       sel = c;
+       drawstatus();
+       if(!selscreen)
+               return;
+       if(c) {
+               XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
+               XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
+       }
+       else
+               XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 }
 
 void
 }
 
 void
-focusprev(Arg *arg)
-{
+focusnext(Arg *arg) {
        Client *c;
        Client *c;
-
+   
        if(!sel)
                return;
        if(!sel)
                return;
-
-       if((c = sel->revert && sel->revert->tags[tsel] ? sel->revert : NULL)) {
-               higher(c);
+       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);
                focus(c);
+               restack();
        }
 }
 
        }
 }
 
-Client *
-getclient(Window w)
-{
-       Client *c;
-       for(c = clients; c; c = c->next)
-               if(c->win == w)
-                       return c;
-       return NULL;
-}
-
-Client *
-getctitle(Window w)
-{
-       Client *c;
-       for(c = clients; c; c = c->next)
-               if(c->title == w)
-                       return c;
-       return NULL;
-}
-
 void
 void
-gravitate(Client *c, Bool invert)
-{
-       int dx = 0, dy = 0;
-
-       switch(c->grav) {
-       case StaticGravity:
-       case NorthWestGravity:
-       case NorthGravity:
-       case NorthEastGravity:
-               dy = c->border;
-               break;
-       case EastGravity:
-       case CenterGravity:
-       case WestGravity:
-               dy = -(c->h / 2) + c->border;
-               break;
-       case SouthEastGravity:
-       case SouthGravity:
-       case SouthWestGravity:
-               dy = -c->h;
-               break;
-       default:
-               break;
-       }
+focusprev(Arg *arg) {
+       Client *c;
 
 
-       switch (c->grav) {
-       case StaticGravity:
-       case NorthWestGravity:
-       case WestGravity:
-       case SouthWestGravity:
-               dx = c->border;
-               break;
-       case NorthGravity:
-       case CenterGravity:
-       case SouthGravity:
-               dx = -(c->w / 2) + c->border;
-               break;
-       case NorthEastGravity:
-       case EastGravity:
-       case SouthEastGravity:
-               dx = -(c->w + c->border);
-               break;
-       default:
-               break;
+       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(invert) {
-               dx = -dx;
-               dy = -dy;
+       if(c) {
+               focus(c);
+               restack();
        }
        }
-       c->x += dx;
-       c->y += dy;
 }
 
 void
 }
 
 void
-higher(Client *c)
-{
-       XRaiseWindow(dpy, c->win);
-       XRaiseWindow(dpy, c->title);
-}
-
-void
-killclient(Arg *arg)
-{
+killclient(Arg *arg) {
        if(!sel)
                return;
        if(!sel)
                return;
-       if(sel->proto & WM_PROTOCOL_DELWIN)
+       if(isprotodel(sel))
                sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
        else
                XKillClient(dpy, sel->win);
 }
 
 void
                sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
        else
                XKillClient(dpy, sel->win);
 }
 
 void
-lower(Client *c)
-{
-       XLowerWindow(dpy, c->title);
-       XLowerWindow(dpy, c->win);
-}
-
-void
-manage(Window w, XWindowAttributes *wa)
-{
-       Client *c;
-       XSetWindowAttributes twa;
+manage(Window w, XWindowAttributes *wa) {
+       Client *c, *t;
        Window trans;
        Window trans;
+       XWindowChanges wc;
 
        c = emallocz(sizeof(Client));
 
        c = emallocz(sizeof(Client));
+       c->tags = emallocz(ntags * sizeof(Bool));
        c->win = w;
        c->win = w;
-       c->tx = c->x = wa->x;
-       c->ty = c->y = wa->y;
-       if(c->y < bh)
-               c->ty = c->y += bh;
-       c->tw = c->w = wa->width;
+       c->x = wa->x;
+       c->y = wa->y;
+       c->w = wa->width;
        c->h = wa->height;
        c->h = wa->height;
-       c->th = bh;
-       c->border = 1;
-       c->proto = getproto(c->win);
-       setsize(c);
-       XSelectInput(dpy, c->win,
-                       StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
-       XGetTransientForHint(dpy, c->win, &trans);
-       twa.override_redirect = 1;
-       twa.background_pixmap = ParentRelative;
-       twa.event_mask = ExposureMask;
-
-       c->title = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
-                       0, DefaultDepth(dpy, screen), CopyFromParent,
-                       DefaultVisual(dpy, screen),
-                       CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
-
-       settitle(c);
-       settags(c);
-
-       c->next = clients;
-       clients = c;
-
-       XGrabButton(dpy, Button1, ControlMask, c->win, False, ButtonPressMask,
-                       GrabModeAsync, GrabModeSync, None, None);
-       XGrabButton(dpy, Button1, Mod1Mask, c->win, False, ButtonPressMask,
-                       GrabModeAsync, GrabModeSync, None, None);
-       XGrabButton(dpy, Button2, Mod1Mask, c->win, False, ButtonPressMask,
-                       GrabModeAsync, GrabModeSync, None, None);
-       XGrabButton(dpy, Button3, Mod1Mask, c->win, False, ButtonPressMask,
-                       GrabModeAsync, GrabModeSync, None, None);
-
-       if(!c->isfloat)
-               c->isfloat = trans
-                       || ((c->maxw == c->minw) && (c->maxh == c->minh));
-
-       arrange(NULL);
-       /* mapping the window now prevents flicker */
-       if(c->tags[tsel]) {
-               XMapRaised(dpy, c->win);
-               XMapRaised(dpy, c->title);
-               focus(c);
+       if(c->w == sw && c->h == sh) {
+               c->border = 0;
+               c->x = sx;
+               c->y = sy;
        }
        else {
        }
        else {
-               ban(c);
-               XMapRaised(dpy, c->win);
-               XMapRaised(dpy, c->title);
+               c->border = BORDERPX;
+               if(c->x + c->w + 2 * c->border > wax + waw)
+                       c->x = wax + waw - c->w - 2 * c->border;
+               if(c->y + c->h + 2 * c->border > way + wah)
+                       c->y = way + wah - c->h - 2 * c->border;
+               if(c->x < wax)
+                       c->x = wax;
+               if(c->y < way)
+                       c->y = way;
        }
        }
+       updatesizehints(c);
+       XSelectInput(dpy, w,
+               StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
+       XGetTransientForHint(dpy, w, &trans);
+       grabbuttons(c, False);
+       wc.border_width = c->border;
+       XConfigureWindow(dpy, w, CWBorderWidth, &wc);
+       XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
+       configure(c); /* propagates border_width, if size doesn't change */
+       updatetitle(c);
+       for(t = clients; t && t->win != trans; t = t->next);
+       settags(c, t);
+       if(!c->isversatile)
+               c->isversatile = (t != NULL) || c->isfixed;
+       attach(c);
+       attachstack(c);
+       c->isbanned = True;
+       XMoveWindow(dpy, w, c->x + 2 * sw, c->y);
+       XMapWindow(dpy, w);
+       setclientstate(c, NormalState);
+       if(isvisible(c))
+               focus(c);
+       lt->arrange();
 }
 
 }
 
-void
-maximize(Arg *arg)
-{
-       if(!sel)
-               return;
-       sel->x = sx;
-       sel->y = sy + bh;
-       sel->w = sw - 2 * sel->border;
-       sel->h = sh - 2 * sel->border - bh;
-       higher(sel);
-       resize(sel, False);
+Client *
+nexttiled(Client *c) {
+       for(; c && (c->isversatile || !isvisible(c)); c = c->next);
+       return c;
 }
 
 void
 }
 
 void
-resize(Client *c, Bool inc)
-{
-       XConfigureEvent e;
+resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
+       float actual, dx, dy, max, min;
+       XWindowChanges wc;
 
 
-       if(inc) {
+       if(w <= 0 || h <= 0)
+               return;
+       if(sizehints) {
+               if(c->minw && w < c->minw)
+                       w = c->minw;
+               if(c->minh && h < c->minh)
+                       h = c->minh;
+               if(c->maxw && w > c->maxw)
+                       w = c->maxw;
+               if(c->maxh && h > c->maxh)
+                       h = c->maxh;
+               /* inspired by algorithm from fluxbox */
+               if(c->minay > 0 && c->maxay && (h - c->baseh) > 0) {
+                       dx = (float)(w - c->basew);
+                       dy = (float)(h - c->baseh);
+                       min = (float)(c->minax) / (float)(c->minay);
+                       max = (float)(c->maxax) / (float)(c->maxay);
+                       actual = dx / dy;
+                       if(max > 0 && min > 0 && actual > 0) {
+                               if(actual < min) {
+                                       dy = (dx * min + dy) / (min * min + 1);
+                                       dx = dy * min;
+                                       w = (int)dx + c->basew;
+                                       h = (int)dy + c->baseh;
+                               }
+                               else if(actual > max) {
+                                       dy = (dx * min + dy) / (max * max + 1);
+                                       dx = dy * min;
+                                       w = (int)dx + c->basew;
+                                       h = (int)dy + c->baseh;
+                               }
+                       }
+               }
                if(c->incw)
                if(c->incw)
-                       c->w -= (c->w - c->basew) % c->incw;
+                       w -= (w - c->basew) % c->incw;
                if(c->inch)
                if(c->inch)
-                       c->h -= (c->h - c->baseh) % c->inch;
+                       h -= (h - c->baseh) % c->inch;
+       }
+       if(w == sw && h == sh)
+               c->border = 0;
+       else
+               c->border = BORDERPX;
+       /* offscreen appearance fixes */
+       if(x > sw)
+               x = sw - w - 2 * c->border;
+       if(y > sh)
+               y = sh - h - 2 * c->border;
+       if(x + w + 2 * c->border < sx)
+               x = sx;
+       if(y + h + 2 * c->border < sy)
+               y = sy;
+       if(c->x != x || c->y != y || c->w != w || c->h != h) {
+               c->x = wc.x = x;
+               c->y = wc.y = y;
+               c->w = wc.width = w;
+               c->h = wc.height = h;
+               wc.border_width = c->border;
+               XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
+               configure(c);
+               XSync(dpy, False);
        }
        }
-       if(c->x > sw) /* might happen on restart */
-               c->x = sw - c->w;
-       if(c->y > sh)
-               c->ty = c->y = sh - c->h;
-       if(c->minw && c->w < c->minw)
-               c->w = c->minw;
-       if(c->minh && c->h < c->minh)
-               c->h = c->minh;
-       if(c->maxw && c->w > c->maxw)
-               c->w = c->maxw;
-       if(c->maxh && c->h > c->maxh)
-               c->h = c->maxh;
-       resizetitle(c);
-       XSetWindowBorderWidth(dpy, c->win, 1);
-       XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
-       e.type = ConfigureNotify;
-       e.event = c->win;
-       e.window = c->win;
-       e.x = c->x;
-       e.y = c->y;
-       e.width = c->w;
-       e.height = c->h;
-       e.border_width = c->border;
-       e.above = None;
-       e.override_redirect = False;
-       XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&e);
-       XSync(dpy, False);
 }
 
 void
 }
 
 void
-setsize(Client *c)
-{
-       XSizeHints size;
+updatesizehints(Client *c) {
        long msize;
        long msize;
+       XSizeHints size;
+
        if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
                size.flags = PSize;
        c->flags = size.flags;
        if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
                size.flags = PSize;
        c->flags = size.flags;
@@ -338,18 +372,23 @@ setsize(Client *c)
        }
        else
                c->minw = c->minh = 0;
        }
        else
                c->minw = c->minh = 0;
-       if(c->flags & PWinGravity)
-               c->grav = size.win_gravity;
+       if(c->flags & PAspect) {
+               c->minax = size.min_aspect.x;
+               c->minay = size.min_aspect.y;
+               c->maxax = size.max_aspect.x;
+               c->maxay = size.max_aspect.y;
+       }
        else
        else
-               c->grav = NorthWestGravity;
+               c->minax = c->minay = c->maxax = c->maxay = 0;
+       c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
+                       && c->maxw == c->minw && c->maxh == c->minh);
 }
 
 void
 }
 
 void
-settitle(Client *c)
-{
-       XTextProperty name;
-       int n;
+updatetitle(Client *c) {
        char **list = NULL;
        char **list = NULL;
+       int n;
+       XTextProperty name;
 
        name.nitems = 0;
        c->name[0] = 0;
 
        name.nitems = 0;
        c->name[0] = 0;
@@ -359,66 +398,59 @@ settitle(Client *c)
        if(!name.nitems)
                return;
        if(name.encoding == XA_STRING)
        if(!name.nitems)
                return;
        if(name.encoding == XA_STRING)
-               strncpy(c->name, (char *)name.value, sizeof(c->name));
+               strncpy(c->name, (char *)name.value, sizeof c->name);
        else {
                if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
        else {
                if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
-                               && n > 0 && *list)
+               && n > 0 && *list)
                {
                {
-                       strncpy(c->name, *list, sizeof(c->name));
+                       strncpy(c->name, *list, sizeof c->name);
                        XFreeStringList(list);
                }
        }
        XFree(name.value);
                        XFreeStringList(list);
                }
        }
        XFree(name.value);
-       resizetitle(c);
 }
 
 void
 }
 
 void
-unmanage(Client *c)
-{
-       Client **l;
+unmanage(Client *c) {
+       Client *nc;
 
 
+       /* The server grab construct avoids race conditions. */
        XGrabServer(dpy);
        XSetErrorHandler(xerrordummy);
        XGrabServer(dpy);
        XSetErrorHandler(xerrordummy);
-
+       detach(c);
+       detachstack(c);
+       if(sel == c) {
+               for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
+               focus(nc);
+       }
        XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
        XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
-       XDestroyWindow(dpy, c->title);
-
-       for(l = &clients; *l && *l != c; l = &(*l)->next);
-       *l = c->next;
-       for(l = &clients; *l; l = &(*l)->next)
-               if((*l)->revert == c)
-                       (*l)->revert = NULL;
-       if(sel == c)
-               sel = sel->revert ? sel->revert : clients;
-
+       setclientstate(c, WithdrawnState);
+       free(c->tags);
        free(c);
        free(c);
-
        XSync(dpy, False);
        XSetErrorHandler(xerror);
        XUngrabServer(dpy);
        XSync(dpy, False);
        XSetErrorHandler(xerror);
        XUngrabServer(dpy);
-       arrange(NULL);
-       if(sel)
-               focus(sel);
+       lt->arrange();
 }
 
 void
 }
 
 void
-zoom(Arg *arg)
-{
-       Client **l, *c;
+zoom(Arg *arg) {
+       unsigned int n;
+       Client *c;
 
        if(!sel)
                return;
 
        if(!sel)
                return;
-
-       if(sel == getnext(clients) && sel->next)  {
-               if((c = getnext(sel->next)))
-                       sel = c;
+       if(sel->isversatile || (lt->arrange == versatile)) {
+               togglemax(sel);
+               return;
        }
        }
-
-       for(l = &clients; *l && *l != sel; l = &(*l)->next);
-       *l = sel->next;
-
-       sel->next = clients; /* pop */
-       clients = sel;
-       arrange(NULL);
-       focus(sel);
+       for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
+               n++;
+       if((c = sel) == nexttiled(clients))
+               if(!(c = nexttiled(c->next)))
+                       return;
+       detach(c);
+       attach(c);
+       focus(c);
+       lt->arrange();
 }
 }