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/* (C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
 * See LICENSE file for license details.
 */
#include "dwm.h"

/* extern */

void (*arrange)(void) = DEFMODE;

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
dofloat(void) {
	Client *c;

	for(c = clients; c; c = c->next) {
		if(isvisible(c)) {
			if(c->isbanned)
				XMoveWindow(dpy, c->win, c->x, c->y);
			c->isbanned = False;
			resize(c, c->x, c->y, c->w, c->h, True);
		}
		else {
			c->isbanned = True;
			XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
		}
	}
	if(!sel || !isvisible(sel)) {
		for(c = stack; c && !isvisible(c); c = c->snext);
		focus(c);
	}
	restack();
}

void
focusnext(Arg *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(Arg *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();
	}
}

Bool
isvisible(Client *c) {
	unsigned int i;

	for(i = 0; i < ntags; i++)
		if(c->tags[i] && seltag[i])
			return True;
	return False;
}

Client *
nextmanaged(Client *c) {
	for(; c && (c->isfloat || !isvisible(c)); c = c->next);
	return c;
}

void
restack(void) {
	Client *c;
	XEvent ev;

	drawstatus();
	if(!sel)
		return;
	if(sel->isfloat || arrange == dofloat)
		XRaiseWindow(dpy, sel->win);
	if(arrange != dofloat) {
		if(!sel->isfloat)
			XLowerWindow(dpy, sel->win);
		for(c = nextmanaged(clients); c; c = nextmanaged(c->next)) {
			if(c == sel)
				continue;
			XLowerWindow(dpy, c->win);
		}
	}
	XSync(dpy, False);
	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
}

void
togglefloat(Arg *arg) {
	if(!sel || arrange == dofloat)
		return;
	sel->isfloat = !sel->isfloat;
	arrange();
}

void
togglemode(Arg *arg) {
	arrange = (arrange == dofloat) ? dotile : dofloat;
	if(sel)
		arrange();
	else
		drawstatus();
}

void
toggleview(Arg *arg) {
	unsigned int i;

	seltag[arg->i] = !seltag[arg->i];
	for(i = 0; i < ntags && !seltag[i]; i++);
	if(i == ntags)
		seltag[arg->i] = True; /* cannot toggle last view */
	arrange();
}

void
view(Arg *arg) {
	unsigned int i;

	for(i = 0; i < ntags; i++)
		seltag[i] = (arg->i == -1) ? True : False;
	if(arg->i >= 0 && arg->i < ntags)
		seltag[arg->i] = True;
	arrange();
}