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->ismax = !c->ismax)) {
 49		c->rx = c->x; c->x = sx;
 50		c->ry = c->y; c->y = bh;
 51		c->rw = c->w; c->w = sw - 2 * BORDERPX;
 52		c->rh = c->h; c->h = sh - bh - 2 * BORDERPX;
 53	}
 54	else {
 55		c->x = c->rx;
 56		c->y = c->ry;
 57		c->w = c->rw;
 58		c->h = c->rh;
 59	}
 60	resize(c, True, TopLeft);
 61	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 62}
 63
 64/* extern */
 65
 66void (*arrange)(Arg *) = DEFMODE;
 67
 68void
 69detach(Client *c) {
 70	if(c->prev)
 71		c->prev->next = c->next;
 72	if(c->next)
 73		c->next->prev = c->prev;
 74	if(c == clients)
 75		clients = c->next;
 76	c->next = c->prev = NULL;
 77}
 78
 79void
 80dofloat(Arg *arg) {
 81	Client *c;
 82
 83	for(c = clients; c; c = c->next) {
 84		if(isvisible(c)) {
 85			resize(c, True, TopLeft);
 86		}
 87		else
 88			ban(c);
 89	}
 90	if(!sel || !isvisible(sel)) {
 91		for(c = stack; c && !isvisible(c); c = c->snext);
 92		focus(c);
 93	}
 94	restack();
 95}
 96
 97void
 98dotile(Arg *arg) {
 99	unsigned int i, n, mpx, stackw, stackh, th;
100	Client *c;
101
102	for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
103		n++;
104	mpx = (sw * master) / 1000;
105	stackw = sw - mpx;
106	stackh = sh - bh;
107	th = stackh;
108	if(n > 1)
109		th /= (n - 1);
110
111	for(i = 0, c = clients; c; c = c->next, i++)
112		if(isvisible(c)) {
113			if(c->isfloat) {
114				resize(c, True, TopLeft);
115				continue;
116			}
117			c->ismax = False;
118			c->x = sx;
119			c->y = sy + bh;
120			if(n == 1) { /* only 1 window */
121				c->w = sw - 2 * BORDERPX;
122				c->h = sh - 2 * BORDERPX - bh;
123			}
124			else if(i == 0) { /* master window */
125				c->w = mpx - 2 * BORDERPX;
126				c->h = sh - bh - 2 * BORDERPX;
127			}
128			else {  /* tile window */
129				c->x += mpx;
130				c->w = stackw - 2 * BORDERPX;
131				if(th > bh) {
132					c->y = sy + (i - 1) * th + bh;
133					if(i + 1 == n)
134						c->h = sh - c->y - 2 * BORDERPX;
135					else
136						c->h = th - 2 * BORDERPX;
137				}
138				else /* fallback if th < bh */
139					c->h = stackh - 2 * BORDERPX;
140			}
141			resize(c, False, TopLeft);
142		}
143		else
144			ban(c);
145
146	if(!sel || !isvisible(sel)) {
147		for(c = stack; c && !isvisible(c); c = c->snext);
148		focus(c);
149	}
150	restack();
151}
152
153void
154focusnext(Arg *arg) {
155	Client *c;
156   
157	if(!sel)
158		return;
159	if(!(c = getnext(sel->next)))
160		c = getnext(clients);
161	if(c) {
162		focus(c);
163		restack();
164	}
165}
166
167void
168focusprev(Arg *arg) {
169	Client *c;
170
171	if(!sel)
172		return;
173	if(!(c = getprev(sel->prev))) {
174		for(c = clients; c && c->next; c = c->next);
175		c = getprev(c);
176	}
177	if(c) {
178		focus(c);
179		restack();
180	}
181}
182
183Bool
184isvisible(Client *c) {
185	unsigned int i;
186
187	for(i = 0; i < ntags; i++)
188		if(c->tags[i] && seltag[i])
189			return True;
190	return False;
191}
192
193void
194resizecol(Arg *arg) {
195	unsigned int n;
196	Client *c;
197
198	for(n = 0, c = clients; c; c = c->next)
199		if(isvisible(c) && !c->isfloat)
200			n++;
201	if(!sel || sel->isfloat || n < 2 || (arrange == dofloat))
202		return;
203	if(sel == getnext(clients)) {
204		if(master + arg->i > 950 || master + arg->i < 50)
205			return;
206		master += arg->i;
207	}
208	else {
209		if(master - arg->i > 950 || master - arg->i < 50)
210			return;
211		master -= arg->i;
212	}
213	arrange(NULL);
214}
215
216void
217restack(void) {
218	Client *c;
219	XEvent ev;
220
221	if(!sel) {
222		drawstatus();
223		return;
224	}
225	if(sel->isfloat || arrange == dofloat) {
226		XRaiseWindow(dpy, sel->win);
227		XRaiseWindow(dpy, sel->twin);
228	}
229	if(arrange != dofloat) {
230		if(!sel->isfloat) {
231			XLowerWindow(dpy, sel->twin);
232			XLowerWindow(dpy, sel->win);
233		}
234		for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
235			if(c == sel)
236				continue;
237			XLowerWindow(dpy, c->twin);
238			XLowerWindow(dpy, c->win);
239		}
240	}
241	drawall();
242	XSync(dpy, False);
243	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
244}
245
246void
247togglemode(Arg *arg) {
248	arrange = (arrange == dofloat) ? dotile : dofloat;
249	if(sel)
250		arrange(NULL);
251	else
252		drawstatus();
253}
254
255void
256toggleview(Arg *arg) {
257	unsigned int i;
258
259	seltag[arg->i] = !seltag[arg->i];
260	for(i = 0; i < ntags && !seltag[i]; i++);
261	if(i == ntags)
262		seltag[arg->i] = True; /* cannot toggle last view */
263	reorder();
264	arrange(NULL);
265}
266
267void
268view(Arg *arg) {
269	unsigned int i;
270
271	for(i = 0; i < ntags; i++)
272		seltag[i] = False;
273	seltag[arg->i] = True;
274	reorder();
275	arrange(NULL);
276}
277
278void
279viewall(Arg *arg) {
280	unsigned int i;
281
282	for(i = 0; i < ntags; i++)
283		seltag[i] = True;
284	reorder();
285	arrange(NULL);
286}
287
288void
289zoom(Arg *arg) {
290	unsigned int n;
291	Client *c;
292
293	if(!sel)
294		return;
295	if(sel->isfloat || (arrange == dofloat)) {
296		togglemax(sel);
297		return;
298	}
299	for(n = 0, c = clients; c; c = c->next)
300		if(isvisible(c) && !c->isfloat)
301			n++;
302	if(n < 2 || (arrange == dofloat))
303		return;
304	if((c = sel) == nexttiled(clients))
305		if(!(c = nexttiled(c->next)))
306			return;
307	detach(c);
308	if(clients)
309		clients->prev = c;
310	c->next = clients;
311	clients = c;
312	focus(c);
313	arrange(NULL);
314}