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 = wax;
 53		c->ry = c->y; c->y = way;
 54		c->rw = c->w; c->w = waw - 2 * BORDERPX;
 55		c->rh = c->h; c->h = wah - 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, th;
103	Client *c;
104
105	for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
106		n++;
107	mpx = (waw * master) / 1000;
108	stackw = waw - mpx;
109
110	for(i = 0, c = clients; c; c = c->next)
111		if(isvisible(c)) {
112			if(c->isfloat) {
113				resize(c, True, TopLeft);
114				continue;
115			}
116			c->ismax = False;
117			c->x = wax;
118			c->y = way;
119			if(n == 1) { /* only 1 window */
120				c->w = waw - 2 * BORDERPX;
121				c->h = wah - 2 * BORDERPX;
122			}
123			else if(i == 0) { /* master window */
124				c->w = waw - stackw - 2 * BORDERPX;
125				c->h = wah - 2 * BORDERPX;
126				th = wah / (n - 1);
127			}
128			else {  /* tile window */
129				c->x += mpx;
130				c->w = stackw - 2 * BORDERPX;
131				if(th > bh) {
132					c->y = way + (i - 1) * th;
133					c->h = th - 2 * BORDERPX;
134				}
135				else /* fallback if th < bh */
136					c->h = wah - 2 * BORDERPX;
137			}
138			resize(c, False, TopLeft);
139			i++;
140		}
141		else
142			ban(c);
143
144	if(!sel || !isvisible(sel)) {
145		for(c = stack; c && !isvisible(c); c = c->snext);
146		focus(c);
147	}
148	restack();
149}
150
151void
152focusnext(Arg *arg) {
153	Client *c;
154   
155	if(!sel)
156		return;
157	if(!(c = getnext(sel->next)))
158		c = getnext(clients);
159	if(c) {
160		focus(c);
161		restack();
162	}
163}
164
165void
166focusprev(Arg *arg) {
167	Client *c;
168
169	if(!sel)
170		return;
171	if(!(c = getprev(sel->prev))) {
172		for(c = clients; c && c->next; c = c->next);
173		c = getprev(c);
174	}
175	if(c) {
176		focus(c);
177		restack();
178	}
179}
180
181Bool
182isvisible(Client *c) {
183	unsigned int i;
184
185	for(i = 0; i < ntags; i++)
186		if(c->tags[i] && seltag[i])
187			return True;
188	return False;
189}
190
191void
192resizemaster(Arg *arg) {
193	if(arg->i == 0)
194		master = MASTER;
195	else {
196		if(master + arg->i > 950 || master + arg->i < 50)
197			return;
198		master += arg->i;
199	}
200	arrange();
201}
202
203void
204restack(void) {
205	Client *c;
206	XEvent ev;
207
208	if(!sel) {
209		drawstatus();
210		return;
211	}
212	if(sel->isfloat || arrange == dofloat) {
213		XRaiseWindow(dpy, sel->win);
214		XRaiseWindow(dpy, sel->twin);
215	}
216	if(arrange != dofloat) {
217		if(!sel->isfloat) {
218			XLowerWindow(dpy, sel->twin);
219			XLowerWindow(dpy, sel->win);
220		}
221		for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
222			if(c == sel)
223				continue;
224			XLowerWindow(dpy, c->twin);
225			XLowerWindow(dpy, c->win);
226		}
227	}
228	drawall();
229	XSync(dpy, False);
230	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
231}
232
233void
234togglemode(Arg *arg) {
235	arrange = (arrange == dofloat) ? dotile : dofloat;
236	if(sel)
237		arrange();
238	else
239		drawstatus();
240}
241
242void
243toggleview(Arg *arg) {
244	unsigned int i;
245
246	seltag[arg->i] = !seltag[arg->i];
247	for(i = 0; i < ntags && !seltag[i]; i++);
248	if(i == ntags)
249		seltag[arg->i] = True; /* cannot toggle last view */
250	reorder();
251	arrange();
252}
253
254void
255view(Arg *arg) {
256	unsigned int i;
257
258	for(i = 0; i < ntags; i++)
259		seltag[i] = False;
260	seltag[arg->i] = True;
261	reorder();
262	arrange();
263}
264
265void
266viewall(Arg *arg) {
267	unsigned int i;
268
269	for(i = 0; i < ntags; i++)
270		seltag[i] = True;
271	reorder();
272	arrange();
273}
274
275void
276zoom(Arg *arg) {
277	unsigned int n;
278	Client *c;
279
280	if(!sel)
281		return;
282	if(sel->isfloat || (arrange == dofloat)) {
283		togglemax(sel);
284		return;
285	}
286	for(n = 0, c = clients; c; c = c->next)
287		if(isvisible(c) && !c->isfloat)
288			n++;
289	if(n < 2 || (arrange == dofloat))
290		return;
291	if((c = sel) == nexttiled(clients))
292		if(!(c = nexttiled(c->next)))
293			return;
294	detach(c);
295	if(clients)
296		clients->prev = c;
297	c->next = clients;
298	clients = c;
299	focus(c);
300	arrange();
301}