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 * stack->border;
 22	stack->h = sh - bh - 2 * stack->border;
 23	resize(stack);
 24	discard_events(EnterWindowMask);
 25}
 26
 27void
 28arrange(void *aux)
 29{
 30	Client *c;
 31	int n, cols, rows, gw, gh, i, j;
 32    float rt, fd;
 33
 34	if(!clients)
 35		return;
 36	for(n = 0, c = clients; c; c = c->next, n++);
 37	rt = sqrt(n);
 38	if(modff(rt, &fd) < 0.5)
 39		rows = floor(rt);
 40	else
 41		rows = ceil(rt);
 42	if(rows * rows < n)
 43		cols = rows + 1;
 44	else
 45		cols = rows;
 46
 47	gw = (sw - 2)  / cols;
 48	gh = (sh - bh - 2) / rows;
 49
 50	for(i = j = 0, c = clients; c; c = c->next) {
 51		c->x = i * gw;
 52		c->y = j * gh + bh;
 53		c->w = gw;
 54		c->h = gh;
 55		resize(c);
 56		if(++i == cols) {
 57			j++;
 58			i = 0;
 59		}
 60	}
 61	discard_events(EnterWindowMask);
 62}
 63
 64void
 65sel(void *aux)
 66{
 67	const char *arg = aux;
 68	Client *c = NULL;
 69
 70	if(!arg || !stack)
 71		return;
 72	if(!strncmp(arg, "next", 5))
 73		c = stack->snext ? stack->snext : stack;
 74	else if(!strncmp(arg, "prev", 5))
 75		for(c = stack; c && c->snext; c = c->snext);
 76	if(!c)
 77		c = stack;
 78	raise(c);
 79	focus(c);
 80}
 81
 82void
 83kill(void *aux)
 84{
 85	Client *c = stack;
 86
 87	if(!c)
 88		return;
 89	if(c->proto & WM_PROTOCOL_DELWIN)
 90		send_message(c->win, wm_atom[WMProtocols], wm_atom[WMDelete]);
 91	else
 92		XKillClient(dpy, c->win);
 93}
 94
 95static void
 96resize_title(Client *c)
 97{
 98	c->tw = textw(&brush.font, c->name) + bh;
 99	if(c->tw > c->w)
100		c->tw = c->w + 2;
101	c->tx = c->x + c->w - c->tw + 2;
102	c->ty = c->y;
103	XMoveResizeWindow(dpy, c->title, c->tx, c->ty, c->tw, c->th);
104}
105
106void
107update_name(Client *c)
108{
109	XTextProperty name;
110	int n;
111	char **list = NULL;
112
113	name.nitems = 0;
114	c->name[0] = 0;
115	XGetTextProperty(dpy, c->win, &name, net_atom[NetWMName]);
116	if(!name.nitems)
117		XGetWMName(dpy, c->win, &name);
118	if(!name.nitems)
119		return;
120	if(name.encoding == XA_STRING)
121		strncpy(c->name, (char *)name.value, sizeof(c->name));
122	else {
123		if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
124				&& n > 0 && *list)
125		{
126			strncpy(c->name, *list, sizeof(c->name));
127			XFreeStringList(list);
128		}
129	}
130	XFree(name.value);
131	resize_title(c);
132}
133
134void
135update_size(Client *c)
136{
137	XSizeHints size;
138	long msize;
139	if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
140		size.flags = PSize;
141	c->flags = size.flags;
142	if(c->flags & PBaseSize) {
143		c->basew = size.base_width;
144		c->baseh = size.base_height;
145	}
146	else
147		c->basew = c->baseh = 0;
148	if(c->flags & PResizeInc) {
149		c->incw = size.width_inc;
150		c->inch = size.height_inc;
151	}
152	else
153		c->incw = c->inch = 0;
154	if(c->flags & PMaxSize) {
155		c->maxw = size.max_width;
156		c->maxh = size.max_height;
157	}
158	else
159		c->maxw = c->maxh = 0;
160	if(c->flags & PMinSize) {
161		c->minw = size.min_width;
162		c->minh = size.min_height;
163	}
164	else
165		c->minw = c->minh = 0;
166	if(c->flags & PWinGravity)
167		c->grav = size.win_gravity;
168	else
169		c->grav = NorthWestGravity;
170}
171
172void
173raise(Client *c)
174{
175	XRaiseWindow(dpy, c->win);
176	XRaiseWindow(dpy, c->title);
177}
178
179void
180lower(Client *c)
181{
182	XLowerWindow(dpy, c->title);
183	XLowerWindow(dpy, c->win);
184}
185
186void
187focus(Client *c)
188{
189	Client **l, *old;
190
191	old = stack;
192	for(l = &stack; *l && *l != c; l = &(*l)->snext);
193	eassert(*l == c);
194	*l = c->snext;
195	c->snext = stack;
196	stack = c;
197	if(old && old != c) {
198		XMapWindow(dpy, old->title);
199		draw_client(old);
200	}
201	XUnmapWindow(dpy, c->title);
202	draw_client(c);
203	XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
204	XFlush(dpy);
205}
206
207void
208manage(Window w, XWindowAttributes *wa)
209{
210	Client *c, **l;
211	XSetWindowAttributes twa;
212
213	c = emallocz(sizeof(Client));
214	c->win = w;
215	c->tx = c->x = wa->x;
216	c->ty = c->y = wa->y;
217	if(c->y < bh)
218		c->ty = c->y += bh;
219	c->tw = c->w = wa->width;
220	c->h = wa->height;
221	c->th = bh;
222	c->border = 1;
223	update_size(c);
224	XSetWindowBorderWidth(dpy, c->win, 1);
225	XSetWindowBorder(dpy, c->win, brush.border);
226	XSelectInput(dpy, c->win,
227			StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
228	XGetTransientForHint(dpy, c->win, &c->trans);
229	twa.override_redirect = 1;
230	twa.background_pixmap = ParentRelative;
231	twa.event_mask = ExposureMask;
232
233	c->title = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
234			0, DefaultDepth(dpy, screen), CopyFromParent,
235			DefaultVisual(dpy, screen),
236			CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
237	update_name(c);
238
239	for(l=&clients; *l; l=&(*l)->next);
240	c->next = *l; /* *l == nil */
241	*l = c;
242	c->snext = stack;
243	stack = c;
244	XMapRaised(dpy, c->win);
245	XMapRaised(dpy, c->title);
246	XGrabButton(dpy, Button1, Mod1Mask, c->win, False, ButtonPressMask,
247			GrabModeAsync, GrabModeSync, None, None);
248	XGrabButton(dpy, Button2, Mod1Mask, c->win, False, ButtonPressMask,
249			GrabModeAsync, GrabModeSync, None, None);
250	XGrabButton(dpy, Button3, Mod1Mask, c->win, False, ButtonPressMask,
251			GrabModeAsync, GrabModeSync, None, None);
252	resize(c);
253	focus(c);
254}
255
256void
257gravitate(Client *c, Bool invert)
258{
259	int dx = 0, dy = 0;
260
261	switch(c->grav) {
262	case StaticGravity:
263	case NorthWestGravity:
264	case NorthGravity:
265	case NorthEastGravity:
266		dy = c->border;
267		break;
268	case EastGravity:
269	case CenterGravity:
270	case WestGravity:
271		dy = -(c->h / 2) + c->border;
272		break;
273	case SouthEastGravity:
274	case SouthGravity:
275	case SouthWestGravity:
276		dy = -c->h;
277		break;
278	default:
279		break;
280	}
281
282	switch (c->grav) {
283	case StaticGravity:
284	case NorthWestGravity:
285	case WestGravity:
286	case SouthWestGravity:
287		dx = c->border;
288		break;
289	case NorthGravity:
290	case CenterGravity:
291	case SouthGravity:
292		dx = -(c->w / 2) + c->border;
293		break;
294	case NorthEastGravity:
295	case EastGravity:
296	case SouthEastGravity:
297		dx = -(c->w + c->border);
298		break;
299	default:
300		break;
301	}
302
303	if(invert) {
304		dx = -dx;
305		dy = -dy;
306	}
307	c->x += dx;
308	c->y += dy;
309}
310
311void
312resize(Client *c)
313{
314	XConfigureEvent e;
315
316	resize_title(c);
317	XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
318	e.type = ConfigureNotify;
319	e.event = c->win;
320	e.window = c->win;
321	e.x = c->x;
322	e.y = c->y;
323	e.width = c->w;
324	e.height = c->h;
325	e.border_width = c->border;
326	e.above = None;
327	e.override_redirect = False;
328	XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&e);
329	XFlush(dpy);
330}
331
332static int
333dummy_error_handler(Display *dpy, XErrorEvent *error)
334{
335	return 0;
336}
337
338void
339unmanage(Client *c)
340{
341	Client **l;
342
343	XGrabServer(dpy);
344	XSetErrorHandler(dummy_error_handler);
345
346	XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
347	XDestroyWindow(dpy, c->title);
348
349	for(l=&clients; *l && *l != c; l=&(*l)->next);
350	eassert(*l == c);
351	*l = c->next;
352	for(l=&stack; *l && *l != c; l=&(*l)->snext);
353	eassert(*l == c);
354	*l = c->snext;
355	free(c);
356
357	XFlush(dpy);
358	XSetErrorHandler(error_handler);
359	XUngrabServer(dpy);
360	if(stack)
361		focus(stack);
362}
363
364Client *
365gettitle(Window w)
366{
367	Client *c;
368	for(c = clients; c; c = c->next)
369		if(c->title == w)
370			return c;
371	return NULL;
372}
373
374Client *
375getclient(Window w)
376{
377	Client *c;
378	for(c = clients; c; c = c->next)
379		if(c->win == w)
380			return c;
381	return NULL;
382}
383
384void
385draw_client(Client *c)
386{
387	if(c == stack) {
388		draw_bar();
389		return;
390	}
391
392	brush.x = brush.y = 0;
393	brush.w = c->tw;
394	brush.h = c->th;
395
396	draw(dpy, &brush, True, c->name);
397	XCopyArea(dpy, brush.drawable, c->title, brush.gc,
398			0, 0, c->tw, c->th, 0, 0);
399	XFlush(dpy);
400}