1/*
  2 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
  3 * See LICENSE file for license details.
  4 */
  5#include "dwm.h"
  6
  7/* static */
  8
  9static Client *
 10minclient() {
 11	Client *c, *min;
 12
 13	if((clients && clients->isfloat) || arrange == dofloat)
 14		return clients; /* don't touch floating order */
 15	for(min = c = clients; c; c = c->next)
 16		if(c->weight < min->weight)
 17			min = c;
 18	return min;
 19}
 20
 21static Client *
 22nexttiled(Client *c) {
 23	for(c = getnext(c); c && c->isfloat; c = getnext(c->next));
 24	return c;
 25}
 26
 27static void
 28reorder() {
 29	Client *c, *newclients, *tail;
 30
 31	newclients = tail = NULL;
 32	while((c = minclient())) {
 33		detach(c);
 34		if(tail) {
 35			c->prev = tail;
 36			tail->next = c;
 37			tail = c;
 38		}
 39		else
 40			tail = newclients = c;
 41	}
 42	clients = newclients;
 43}
 44
 45static void
 46togglemax(Client *c)
 47{
 48	XEvent ev;
 49	if((c->ismax = !c->ismax)) {
 50		c->rx = c->x; c->x = sx;
 51		c->ry = c->y; c->y = bh;
 52		c->rw = c->w; c->w = sw;
 53		c->rh = c->h; c->h = sh - bh;
 54	}
 55	else {
 56		c->x = c->rx;
 57		c->y = c->ry;
 58		c->w = c->rw;
 59		c->h = c->rh;
 60	}
 61	resize(c, True, TopLeft);
 62	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 63}
 64
 65/* extern */
 66
 67void (*arrange)(Arg *) = DEFMODE;
 68
 69void
 70detach(Client *c) {
 71	if(c->prev)
 72		c->prev->next = c->next;
 73	if(c->next)
 74		c->next->prev = c->prev;
 75	if(c == clients)
 76		clients = c->next;
 77	c->next = c->prev = NULL;
 78}
 79
 80void
 81dofloat(Arg *arg) {
 82	Client *c;
 83
 84	for(c = clients; c; c = c->next) {
 85		if(isvisible(c)) {
 86			resize(c, True, TopLeft);
 87		}
 88		else
 89			ban(c);
 90	}
 91	if(!sel || !isvisible(sel)) {
 92		for(c = stack; c && !isvisible(c); c = c->snext);
 93		focus(c);
 94	}
 95	restack();
 96}
 97
 98void
 99dotile(Arg *arg) {
100	int h, i, n, w;
101	Client *c;
102
103	w = sw - mw;
104	for(n = 0, c = clients; c; c = c->next)
105		if(isvisible(c) && !c->isfloat)
106			n++;
107
108	if(n > 1)
109		h = (sh - bh) / (n - 1);
110	else
111		h = sh - bh;
112
113	for(i = 0, c = clients; c; c = c->next) {
114		if(isvisible(c)) {
115			if(c->ismax)
116				togglemax(c);
117			if(c->isfloat) {
118				resize(c, True, TopLeft);
119				continue;
120			}
121			if(n == 1) {
122				c->x = sx;
123				c->y = sy + bh;
124				c->w = sw - 2;
125				c->h = sh - 2 - bh;
126			}
127			else if(i == 0) {
128				c->x = sx;
129				c->y = sy + bh;
130				c->w = mw - 2;
131				c->h = sh - 2 - bh;
132			}
133			else if(h > bh) {
134				c->x = sx + mw;
135				c->y = sy + (i - 1) * h + bh;
136				c->w = w - 2;
137				if(i + 1 == n)
138					c->h = sh - c->y - 2;
139				else
140					c->h = h - 2;
141			}
142			else { /* fallback if h < bh */
143				c->x = sx + mw;
144				c->y = sy + bh;
145				c->w = w - 2;
146				c->h = sh - 2 - bh;
147			}
148			resize(c, False, TopLeft);
149			i++;
150		}
151		else
152			ban(c);
153	}
154	if(!sel || !isvisible(sel)) {
155		for(c = stack; c && !isvisible(c); c = c->snext);
156		focus(c);
157	}
158	restack();
159}
160
161void
162focusnext(Arg *arg) {
163	Client *c;
164   
165	if(!sel)
166		return;
167
168	if(!(c = getnext(sel->next)))
169		c = getnext(clients);
170	if(c) {
171		focus(c);
172		restack();
173	}
174}
175
176void
177focusprev(Arg *arg) {
178	Client *c;
179
180	if(!sel)
181		return;
182
183	if(!(c = getprev(sel->prev))) {
184		for(c = clients; c && c->next; c = c->next);
185		c = getprev(c);
186	}
187	if(c) {
188		focus(c);
189		restack();
190	}
191}
192
193Bool
194isvisible(Client *c) {
195	unsigned int i;
196
197	for(i = 0; i < ntags; i++)
198		if(c->tags[i] && seltag[i])
199			return True;
200	return False;
201}
202
203void
204resizecol(Arg *arg) {
205	unsigned int n;
206	Client *c;
207
208	for(n = 0, c = clients; c; c = c->next)
209		if(isvisible(c) && !c->isfloat)
210			n++;
211	if(!sel || sel->isfloat || n < 2 || (arrange != dotile))
212		return;
213
214	if(sel == getnext(clients)) {
215		if(mw + arg->i > sw - 100 || mw + arg->i < 100)
216			return;
217		mw += arg->i;
218	}
219	else {
220		if(mw - arg->i > sw - 100 || mw - arg->i < 100)
221			return;
222		mw -= arg->i;
223	}
224	arrange(NULL);
225}
226
227void
228restack() {
229	Client *c;
230	XEvent ev;
231
232	if(!sel) {
233		drawstatus();
234		return;
235	}
236	if(sel->isfloat || arrange == dofloat) {
237		XRaiseWindow(dpy, sel->win);
238		XRaiseWindow(dpy, sel->twin);
239	}
240	if(arrange != dofloat)
241		for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
242			XLowerWindow(dpy, c->twin);
243			XLowerWindow(dpy, c->win);
244		}
245	drawall();
246	XSync(dpy, False);
247	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
248}
249
250void
251togglemode(Arg *arg) {
252	arrange = (arrange == dofloat) ? dotile : dofloat;
253	if(sel)
254		arrange(NULL);
255	else
256		drawstatus();
257}
258
259void
260toggleview(Arg *arg) {
261	unsigned int i;
262
263	seltag[arg->i] = !seltag[arg->i];
264	for(i = 0; i < ntags && !seltag[i]; i++);
265	if(i == ntags)
266		seltag[arg->i] = True; /* cannot toggle last view */
267	reorder();
268	arrange(NULL);
269}
270
271void
272view(Arg *arg) {
273	unsigned int i;
274
275	for(i = 0; i < ntags; i++)
276		seltag[i] = False;
277	seltag[arg->i] = True;
278	reorder();
279	arrange(NULL);
280}
281
282void
283viewall(Arg *arg) {
284	unsigned int i;
285
286	for(i = 0; i < ntags; i++)
287		seltag[i] = True;
288	reorder();
289	arrange(NULL);
290}
291
292void
293zoom(Arg *arg) {
294	unsigned int n;
295	Client *c;
296
297	if(!sel)
298		return;
299
300	if(sel->isfloat || (arrange == dofloat)) {
301		togglemax(sel);
302		return;
303	}
304
305	for(n = 0, c = clients; c; c = c->next)
306		if(isvisible(c) && !c->isfloat)
307			n++;
308	if(n < 2 || (arrange != dotile))
309		return;
310
311	if((c = sel) == nexttiled(clients))
312		if(!(c = nexttiled(c->next)))
313			return;
314	detach(c);
315	if(clients)
316		clients->prev = c;
317	c->next = clients;
318	clients = c;
319	focus(c);
320	arrange(NULL);
321}