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@@ -0,0 +1,253 @@
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+/*
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+ * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
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+ * See LICENSE file for license details.
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+ */
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+#include "dwm.h"
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+
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+/* extern */
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+
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+void (*arrange)(Arg *) = DEFMODE;
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+
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+void
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+dofloat(Arg *arg)
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+{
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+ Client *c;
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+
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+ for(c = clients; c; c = c->next) {
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+ c->ismax = False;
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+ if(isvisible(c)) {
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+ resize(c, True, TopLeft);
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+ }
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+ else
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+ ban(c);
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+ }
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+ if(!sel || !isvisible(sel))
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+ sel = getnext(clients);
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+ if(sel)
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+ focus(sel);
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+ else
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+ XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
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+ restack();
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+}
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+
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+void
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+dotile(Arg *arg)
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+{
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+ int h, i, n, w;
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+ Client *c;
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+
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+ w = sw - mw;
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+ for(n = 0, c = clients; c; c = c->next)
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+ if(isvisible(c) && !c->isfloat)
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+ n++;
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+
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+ if(n > 1)
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+ h = (sh - bh) / (n - 1);
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+ else
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+ h = sh - bh;
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+
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+ for(i = 0, c = clients; c; c = c->next) {
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+ c->ismax = False;
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+ if(isvisible(c)) {
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+ if(c->isfloat) {
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+ resize(c, True, TopLeft);
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+ continue;
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+ }
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+ if(n == 1) {
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+ c->x = sx;
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+ c->y = sy + bh;
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+ c->w = sw - 2;
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+ c->h = sh - 2 - bh;
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+ }
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+ else if(i == 0) {
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+ c->x = sx;
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+ c->y = sy + bh;
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+ c->w = mw - 2;
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+ c->h = sh - 2 - bh;
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+ }
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+ else if(h > bh) {
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+ c->x = sx + mw;
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+ c->y = sy + (i - 1) * h + bh;
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+ c->w = w - 2;
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+ if(i + 1 == n)
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+ c->h = sh - c->y - 2;
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+ else
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+ c->h = h - 2;
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+ }
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+ else { /* fallback if h < bh */
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+ c->x = sx + mw;
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+ c->y = sy + bh;
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+ c->w = w - 2;
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+ c->h = sh - 2 - bh;
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+ }
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+ resize(c, False, TopLeft);
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+ i++;
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+ }
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+ else
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+ ban(c);
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+ }
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+ if(!sel || !isvisible(sel))
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+ sel = getnext(clients);
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+ if(sel)
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+ focus(sel);
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+ else
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+ XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
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+ restack();
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+}
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+
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+void
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+focusnext(Arg *arg)
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+{
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+ Client *c;
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+
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+ if(!sel)
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+ return;
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+
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+ if(!(c = getnext(sel->next)))
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+ c = getnext(clients);
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+ if(c) {
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+ focus(c);
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+ restack();
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+ }
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+}
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+
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+void
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+focusprev(Arg *arg)
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+{
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+ Client *c;
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+
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+ if(!sel)
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+ return;
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+
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+ if(!(c = getprev(sel->prev))) {
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+ for(c = clients; c && c->next; c = c->next);
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+ c = getprev(c);
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+ }
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+ if(c) {
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+ focus(c);
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+ restack();
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+ }
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+}
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+
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+Bool
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+isvisible(Client *c)
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+{
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+ unsigned int i;
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+
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+ for(i = 0; i < ntags; i++)
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+ if(c->tags[i] && seltag[i])
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+ return True;
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+ return False;
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+}
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+
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+void
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+restack()
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+{
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+ static unsigned int nwins = 0;
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+ static Window *wins = NULL;
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+ unsigned int f, fi, m, mi, n;
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+ Client *c;
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+ XEvent ev;
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+
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+ for(f = 0, m = 0, c = clients; c; c = c->next)
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+ if(isvisible(c)) {
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+ if(c->isfloat || arrange == dofloat)
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+ f++;
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+ else
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+ m++;
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+ }
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+ if(!(n = 2 * (f + m))) {
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+ drawstatus();
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+ return;
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+ }
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+ if(nwins < n) {
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+ nwins = n;
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+ wins = erealloc(wins, nwins * sizeof(Window));
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+ }
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+
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+ fi = 0;
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+ mi = 2 * f;
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+ if(sel->isfloat || arrange == dofloat) {
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+ wins[fi++] = sel->title;
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+ wins[fi++] = sel->win;
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+ }
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+ else {
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+ wins[mi++] = sel->title;
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+ wins[mi++] = sel->win;
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+ }
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+ for(c = clients; c; c = c->next)
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+ if(isvisible(c) && c != sel) {
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+ if(c->isfloat || arrange == dofloat) {
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+ wins[fi++] = c->title;
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+ wins[fi++] = c->win;
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+ }
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+ else {
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+ wins[mi++] = c->title;
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+ wins[mi++] = c->win;
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+ }
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+ }
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+ XRestackWindows(dpy, wins, n);
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+ drawall();
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+ XSync(dpy, False);
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+ while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
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+}
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+
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+void
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+togglemode(Arg *arg)
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+{
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+ arrange = arrange == dofloat ? dotile : dofloat;
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+ if(sel)
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+ arrange(NULL);
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+ else
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+ drawstatus();
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+}
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+
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+void
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+toggleview(Arg *arg)
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+{
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+ unsigned int i;
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+
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+ seltag[arg->i] = !seltag[arg->i];
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+ for(i = 0; i < ntags && !seltag[i]; i++);
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+ if(i == ntags)
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+ seltag[arg->i] = True; /* cannot toggle last view */
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+ arrange(NULL);
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+}
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+
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+void
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+view(Arg *arg)
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+{
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+ unsigned int i;
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+
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+ for(i = 0; i < ntags; i++)
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+ seltag[i] = False;
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+ seltag[arg->i] = True;
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+ arrange(NULL);
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+}
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+
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+void
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+zoom(Arg *arg)
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+{
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+ Client *c;
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+
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+ if(!sel || (arrange != dotile) || sel->isfloat || sel->ismax)
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+ return;
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+
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+ if(sel == getnext(clients)) {
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+ if((c = getnext(sel->next)))
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+ sel = c;
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+ else
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+ return;
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+ }
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+
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+ /* pop */
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+ sel->prev->next = sel->next;
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+ if(sel->next)
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+ sel->next->prev = sel->prev;
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+ sel->prev = NULL;
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+ clients->prev = sel;
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+ sel->next = clients;
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+ clients = sel;
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+ focus(sel);
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+ arrange(NULL);
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+}
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Anselm R. Garbe