1/* (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
  2 * See LICENSE file for license details.
  3 */
  4#include "dwm.h"
  5
  6/* static */
  7
  8static Client *
  9minclient(void) {
 10	Client *c, *min;
 11
 12	if((clients && clients->isfloat) || arrange == dofloat)
 13		return clients; /* don't touch floating order */
 14	for(min = c = clients; c; c = c->next)
 15		if(c->weight < min->weight)
 16			min = c;
 17	return min;
 18}
 19
 20static Client *
 21nexttiled(Client *c) {
 22	for(c = getnext(c); c && c->isfloat; c = getnext(c->next));
 23	return c;
 24}
 25
 26static void
 27reorder(void) {
 28	Client *c, *newclients, *tail;
 29
 30	newclients = tail = NULL;
 31	while((c = minclient())) {
 32		detach(c);
 33		if(tail) {
 34			c->prev = tail;
 35			tail->next = c;
 36			tail = c;
 37		}
 38		else
 39			tail = newclients = c;
 40	}
 41	clients = newclients;
 42}
 43
 44static void
 45togglemax(Client *c) {
 46	XEvent ev;
 47		
 48	if(c->isfixed)
 49		return;
 50
 51	if((c->ismax = !c->ismax)) {
 52		c->rx = c->x; c->x = sx;
 53		c->ry = c->y; c->y = bh;
 54		c->rw = c->w; c->w = sw - 2 * BORDERPX;
 55		c->rh = c->h; c->h = sh - bh - 2 * BORDERPX;
 56	}
 57	else {
 58		c->x = c->rx;
 59		c->y = c->ry;
 60		c->w = c->rw;
 61		c->h = c->rh;
 62	}
 63	resize(c, True, TopLeft);
 64	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 65}
 66
 67/* extern */
 68
 69void (*arrange)(void) = DEFMODE;
 70
 71void
 72detach(Client *c) {
 73	if(c->prev)
 74		c->prev->next = c->next;
 75	if(c->next)
 76		c->next->prev = c->prev;
 77	if(c == clients)
 78		clients = c->next;
 79	c->next = c->prev = NULL;
 80}
 81
 82void
 83dofloat(void) {
 84	Client *c;
 85
 86	for(c = clients; c; c = c->next) {
 87		if(isvisible(c)) {
 88			resize(c, True, TopLeft);
 89		}
 90		else
 91			ban(c);
 92	}
 93	if(!sel || !isvisible(sel)) {
 94		for(c = stack; c && !isvisible(c); c = c->snext);
 95		focus(c);
 96	}
 97	restack();
 98}
 99
100void
101dotile(void) {
102	unsigned int i, n, mpx, stackw, stackh, th;
103	Client *c;
104
105	for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
106		n++;
107	mpx = (sw * master) / 1000;
108	stackw = sw - mpx;
109	stackh = sh - bh;
110	th = stackh;
111	if(n > 1)
112		th /= (n - 1);
113
114	for(i = 0, c = clients; c; c = c->next)
115		if(isvisible(c)) {
116			if(c->isfloat) {
117				resize(c, True, TopLeft);
118				continue;
119			}
120			c->ismax = False;
121			c->x = sx;
122			c->y = sy + bh;
123			if(n == 1) { /* only 1 window */
124				c->w = sw - 2 * BORDERPX;
125				c->h = sh - 2 * BORDERPX - bh;
126			}
127			else if(i == 0) { /* master window */
128				c->w = mpx - 2 * BORDERPX;
129				c->h = sh - bh - 2 * BORDERPX;
130			}
131			else {  /* tile window */
132				c->x += mpx;
133				c->w = stackw - 2 * BORDERPX;
134				if(th > bh) {
135					c->y = sy + (i - 1) * th + bh;
136					if(i + 1 == n)
137						c->h = sh - c->y - 2 * BORDERPX;
138					else
139						c->h = th - 2 * BORDERPX;
140				}
141				else /* fallback if th < bh */
142					c->h = stackh - 2 * BORDERPX;
143			}
144			resize(c, False, TopLeft);
145			i++;
146		}
147		else
148			ban(c);
149
150	if(!sel || !isvisible(sel)) {
151		for(c = stack; c && !isvisible(c); c = c->snext);
152		focus(c);
153	}
154	restack();
155}
156
157void
158focusnext(Arg *arg) {
159	Client *c;
160   
161	if(!sel)
162		return;
163	if(!(c = getnext(sel->next)))
164		c = getnext(clients);
165	if(c) {
166		focus(c);
167		restack();
168	}
169}
170
171void
172focusprev(Arg *arg) {
173	Client *c;
174
175	if(!sel)
176		return;
177	if(!(c = getprev(sel->prev))) {
178		for(c = clients; c && c->next; c = c->next);
179		c = getprev(c);
180	}
181	if(c) {
182		focus(c);
183		restack();
184	}
185}
186
187Bool
188isvisible(Client *c) {
189	unsigned int i;
190
191	for(i = 0; i < ntags; i++)
192		if(c->tags[i] && seltag[i])
193			return True;
194	return False;
195}
196
197void
198resizemaster(Arg *arg) {
199	if(arg->i == 0)
200		master = MASTER;
201	else {
202		if(master + arg->i > 950 || master + arg->i < 50)
203			return;
204		master += arg->i;
205	}
206	arrange();
207}
208
209void
210restack(void) {
211	Client *c;
212	XEvent ev;
213
214	if(!sel) {
215		drawstatus();
216		return;
217	}
218	if(sel->isfloat || arrange == dofloat) {
219		XRaiseWindow(dpy, sel->win);
220		XRaiseWindow(dpy, sel->twin);
221	}
222	if(arrange != dofloat) {
223		if(!sel->isfloat) {
224			XLowerWindow(dpy, sel->twin);
225			XLowerWindow(dpy, sel->win);
226		}
227		for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
228			if(c == sel)
229				continue;
230			XLowerWindow(dpy, c->twin);
231			XLowerWindow(dpy, c->win);
232		}
233	}
234	drawall();
235	XSync(dpy, False);
236	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
237}
238
239void
240togglemode(Arg *arg) {
241	arrange = (arrange == dofloat) ? dotile : dofloat;
242	if(sel)
243		arrange();
244	else
245		drawstatus();
246}
247
248void
249toggleview(Arg *arg) {
250	unsigned int i;
251
252	seltag[arg->i] = !seltag[arg->i];
253	for(i = 0; i < ntags && !seltag[i]; i++);
254	if(i == ntags)
255		seltag[arg->i] = True; /* cannot toggle last view */
256	reorder();
257	arrange();
258}
259
260void
261view(Arg *arg) {
262	unsigned int i;
263
264	for(i = 0; i < ntags; i++)
265		seltag[i] = False;
266	seltag[arg->i] = True;
267	reorder();
268	arrange();
269}
270
271void
272viewall(Arg *arg) {
273	unsigned int i;
274
275	for(i = 0; i < ntags; i++)
276		seltag[i] = True;
277	reorder();
278	arrange();
279}
280
281void
282zoom(Arg *arg) {
283	unsigned int n;
284	Client *c;
285
286	if(!sel)
287		return;
288	if(sel->isfloat || (arrange == dofloat)) {
289		togglemax(sel);
290		return;
291	}
292	for(n = 0, c = clients; c; c = c->next)
293		if(isvisible(c) && !c->isfloat)
294			n++;
295	if(n < 2 || (arrange == dofloat))
296		return;
297	if((c = sel) == nexttiled(clients))
298		if(!(c = nexttiled(c->next)))
299			return;
300	detach(c);
301	if(clients)
302		clients->prev = c;
303	c->next = clients;
304	clients = c;
305	focus(c);
306	arrange();
307}