1/*
  2 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
  3 * See LICENSE file for license details.
  4 */
  5
  6#include <math.h>
  7#include <stdlib.h>
  8#include <string.h>
  9#include <X11/Xatom.h>
 10
 11#include "util.h"
 12#include "wm.h"
 13
 14void
 15max(void *aux)
 16{
 17	if(!stack)
 18		return;
 19	stack->x = sx;
 20	stack->y = bh;
 21	stack->w = sw - 2;
 22	stack->h = sh - bh - 2;
 23	resize(stack);
 24}
 25
 26void
 27arrange(void *aux)
 28{
 29	Client *c;
 30	int n, cols, rows, gw, gh, i, j;
 31    float rt, fd;
 32
 33	if(!clients)
 34		return;
 35	for(n = 0, c = clients; c; c = c->next, n++);
 36	rt = sqrt(n);
 37	if(modff(rt, &fd) < 0.5)
 38		rows = floor(rt);
 39	else
 40		rows = ceil(rt);
 41	if(rows * rows < n)
 42		cols = rows + 1;
 43	else
 44		cols = rows;
 45
 46	gw = (sw - 1)  / cols;
 47	gh = (sh - bh - 1) / rows;
 48
 49	for(i = j = 0, c = clients; c; c = c->next) {
 50		c->x = i * gw;
 51		c->y = j * gh + bh;
 52		c->w = gw;
 53		c->h = gh;
 54		resize(c);
 55		if(++i == cols) {
 56			j++;
 57			i = 0;
 58		}
 59	}
 60}
 61
 62void
 63sel(void *aux)
 64{
 65	const char *arg = aux;
 66	Client *c = NULL;
 67
 68	if(!arg || !stack)
 69		return;
 70	if(!strncmp(arg, "next", 5))
 71		c = stack->snext ? stack->snext : stack;
 72	else if(!strncmp(arg, "prev", 5))
 73		for(c = stack; c && c->snext; c = c->snext);
 74	if(!c)
 75		c = stack;
 76	raise(c);
 77	focus(c);
 78}
 79
 80void
 81kill(void *aux)
 82{
 83	Client *c = stack;
 84
 85	if(!c)
 86		return;
 87	if(c->proto & WM_PROTOCOL_DELWIN)
 88		send_message(c->win, wm_atom[WMProtocols], wm_atom[WMDelete]);
 89	else
 90		XKillClient(dpy, c->win);
 91}
 92
 93static void
 94resize_title(Client *c)
 95{
 96	c->tw = textw(&brush.font, c->name) + bh;
 97	if(c->tw > c->w)
 98		c->tw = c->w + 2;
 99	c->tx = c->x + c->w - c->tw + 2;
100	c->ty = c->y;
101	XMoveResizeWindow(dpy, c->title, c->tx, c->ty, c->tw, c->th);
102}
103
104void
105update_name(Client *c)
106{
107	XTextProperty name;
108	int n;
109	char **list = NULL;
110
111	name.nitems = 0;
112	c->name[0] = 0;
113	XGetTextProperty(dpy, c->win, &name, net_atom[NetWMName]);
114	if(!name.nitems)
115		XGetWMName(dpy, c->win, &name);
116	if(!name.nitems)
117		return;
118	if(name.encoding == XA_STRING)
119		strncpy(c->name, (char *)name.value, sizeof(c->name));
120	else {
121		if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
122				&& n > 0 && *list)
123		{
124			strncpy(c->name, *list, sizeof(c->name));
125			XFreeStringList(list);
126		}
127	}
128	XFree(name.value);
129	resize_title(c);
130}
131
132void
133update_size(Client *c)
134{
135	XSizeHints size;
136	long msize;
137	if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
138		size.flags = PSize;
139	c->flags = size.flags;
140	if(c->flags & PBaseSize) {
141		c->basew = size.base_width;
142		c->baseh = size.base_height;
143	}
144	else
145		c->basew = c->baseh = 0;
146	if(c->flags & PResizeInc) {
147		c->incw = size.width_inc;
148		c->inch = size.height_inc;
149	}
150	else
151		c->incw = c->inch = 0;
152	if(c->flags & PMaxSize) {
153		c->maxw = size.max_width;
154		c->maxh = size.max_height;
155	}
156	else
157		c->maxw = c->maxh = 0;
158	if(c->flags & PMinSize) {
159		c->minw = size.min_width;
160		c->minh = size.min_height;
161	}
162	else
163		c->minw = c->minh = 0;
164}
165
166void
167raise(Client *c)
168{
169	XRaiseWindow(dpy, c->win);
170	XRaiseWindow(dpy, c->title);
171}
172
173void
174lower(Client *c)
175{
176	XLowerWindow(dpy, c->title);
177	XLowerWindow(dpy, c->win);
178}
179
180void
181focus(Client *c)
182{
183	Client **l, *old;
184
185	old = stack;
186	for(l = &stack; *l && *l != c; l = &(*l)->snext);
187	eassert(*l == c);
188	*l = c->snext;
189	c->snext = stack;
190	stack = c;
191	if(old && old != c) {
192		XMapWindow(dpy, old->title);
193		draw_client(old);
194	}
195	XUnmapWindow(dpy, c->title);
196	draw_client(c);
197	XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
198	XFlush(dpy);
199}
200
201void
202manage(Window w, XWindowAttributes *wa)
203{
204	Client *c, **l;
205	XSetWindowAttributes twa;
206
207	c = emallocz(sizeof(Client));
208	c->win = w;
209	c->tx = c->x = wa->x;
210	c->ty = c->y = wa->y;
211	if(c->y < bh)
212		c->ty = c->y += bh;
213	c->tw = c->w = wa->width;
214	c->h = wa->height;
215	c->th = bh;
216	update_size(c);
217	XSetWindowBorderWidth(dpy, c->win, 1);
218	XSetWindowBorder(dpy, c->win, brush.border);
219	XSelectInput(dpy, c->win,
220			StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
221	XGetTransientForHint(dpy, c->win, &c->trans);
222	twa.override_redirect = 1;
223	twa.background_pixmap = ParentRelative;
224	twa.event_mask = ExposureMask;
225
226	c->title = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
227			0, DefaultDepth(dpy, screen), CopyFromParent,
228			DefaultVisual(dpy, screen),
229			CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
230	update_name(c);
231
232	for(l=&clients; *l; l=&(*l)->next);
233	c->next = *l; /* *l == nil */
234	*l = c;
235	c->snext = stack;
236	stack = c;
237	XMapRaised(dpy, c->win);
238	XMapRaised(dpy, c->title);
239	XGrabButton(dpy, Button1, Mod1Mask, c->win, False, ButtonPressMask,
240			GrabModeAsync, GrabModeSync, None, None);
241	XGrabButton(dpy, Button2, Mod1Mask, c->win, False, ButtonPressMask,
242			GrabModeAsync, GrabModeSync, None, None);
243	XGrabButton(dpy, Button3, Mod1Mask, c->win, False, ButtonPressMask,
244			GrabModeAsync, GrabModeSync, None, None);
245	resize(c);
246	focus(c);
247}
248
249void
250resize(Client *c)
251{
252	XConfigureEvent e;
253
254	resize_title(c);
255	XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
256	e.type = ConfigureNotify;
257	e.event = c->win;
258	e.window = c->win;
259	e.x = c->x;
260	e.y = c->y;
261	e.width = c->w;
262	e.height = c->h;
263	e.border_width = 0;
264	e.above = None;
265	e.override_redirect = False;
266	XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&e);
267	XFlush(dpy);
268}
269
270static int
271dummy_error_handler(Display *dpy, XErrorEvent *error)
272{
273	return 0;
274}
275
276void
277unmanage(Client *c)
278{
279	Client **l;
280
281	XGrabServer(dpy);
282	XSetErrorHandler(dummy_error_handler);
283
284	XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
285	XDestroyWindow(dpy, c->title);
286
287	for(l=&clients; *l && *l != c; l=&(*l)->next);
288	eassert(*l == c);
289	*l = c->next;
290	for(l=&stack; *l && *l != c; l=&(*l)->snext);
291	eassert(*l == c);
292	*l = c->snext;
293	free(c);
294
295	XFlush(dpy);
296	XSetErrorHandler(error_handler);
297	XUngrabServer(dpy);
298	if(stack)
299		focus(stack);
300}
301
302Client *
303gettitle(Window w)
304{
305	Client *c;
306	for(c = clients; c; c = c->next)
307		if(c->title == w)
308			return c;
309	return NULL;
310}
311
312Client *
313getclient(Window w)
314{
315	Client *c;
316	for(c = clients; c; c = c->next)
317		if(c->win == w)
318			return c;
319	return NULL;
320}
321
322void
323draw_client(Client *c)
324{
325	if(c == stack) {
326		draw_bar();
327		return;
328	}
329
330	brush.x = brush.y = 0;
331	brush.w = c->tw;
332	brush.h = c->th;
333
334	draw(dpy, &brush, True, c->name);
335	XCopyArea(dpy, brush.drawable, c->title, brush.gc,
336			0, 0, c->tw, c->th, 0, 0);
337	XFlush(dpy);
338}