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 (*arrange)(void *aux);
 15
 16void
 17max(void *aux)
 18{
 19	if(!stack)
 20		return;
 21	stack->x = sx;
 22	stack->y = bh;
 23	stack->w = sw - 2 * stack->border;
 24	stack->h = sh - bh - 2 * stack->border;
 25	resize(stack);
 26	discard_events(EnterWindowMask);
 27}
 28
 29void
 30floating(void *aux)
 31{
 32	Client *c;
 33
 34	arrange = floating;
 35	for(c = stack; c; c = c->snext)
 36		resize(c);
 37	discard_events(EnterWindowMask);
 38}
 39
 40void
 41grid(void *aux)
 42{
 43	Client *c;
 44	int n, cols, rows, gw, gh, i, j;
 45    float rt, fd;
 46
 47	arrange = grid;
 48	if(!clients)
 49		return;
 50	for(n = 0, c = clients; c; c = c->next, n++);
 51	rt = sqrt(n);
 52	if(modff(rt, &fd) < 0.5)
 53		rows = floor(rt);
 54	else
 55		rows = ceil(rt);
 56	if(rows * rows < n)
 57		cols = rows + 1;
 58	else
 59		cols = rows;
 60
 61	gw = (sw - 2)  / cols;
 62	gh = (sh - bh - 2) / rows;
 63
 64	for(i = j = 0, c = clients; c; c = c->next) {
 65		c->x = i * gw;
 66		c->y = j * gh + bh;
 67		c->w = gw;
 68		c->h = gh;
 69		resize(c);
 70		if(++i == cols) {
 71			j++;
 72			i = 0;
 73		}
 74	}
 75	discard_events(EnterWindowMask);
 76}
 77
 78void
 79sel(void *aux)
 80{
 81	const char *arg = aux;
 82	Client *c = NULL;
 83
 84	if(!arg || !stack)
 85		return;
 86	if(!strncmp(arg, "next", 5))
 87		c = stack->snext ? stack->snext : stack;
 88	else if(!strncmp(arg, "prev", 5))
 89		for(c = stack; c && c->snext; c = c->snext);
 90	if(!c)
 91		c = stack;
 92	raise(c);
 93	focus(c);
 94}
 95
 96void
 97kill(void *aux)
 98{
 99	Client *c = stack;
100
101	if(!c)
102		return;
103	if(c->proto & WM_PROTOCOL_DELWIN)
104		send_message(c->win, wm_atom[WMProtocols], wm_atom[WMDelete]);
105	else
106		XKillClient(dpy, c->win);
107}
108
109static void
110resize_title(Client *c)
111{
112	int i;
113
114	c->tw = 0;
115	for(i = 0; i < TLast; i++)
116		if(c->tags[i])
117			c->tw += textw(&brush.font, c->tags[i]) + bh;
118	c->tw += textw(&brush.font, c->name) + bh;
119	if(c->tw > c->w)
120		c->tw = c->w + 2;
121	c->tx = c->x + c->w - c->tw + 2;
122	c->ty = c->y;
123	XMoveResizeWindow(dpy, c->title, c->tx, c->ty, c->tw, c->th);
124}
125
126void
127update_name(Client *c)
128{
129	XTextProperty name;
130	int n;
131	char **list = NULL;
132
133	name.nitems = 0;
134	c->name[0] = 0;
135	XGetTextProperty(dpy, c->win, &name, net_atom[NetWMName]);
136	if(!name.nitems)
137		XGetWMName(dpy, c->win, &name);
138	if(!name.nitems)
139		return;
140	if(name.encoding == XA_STRING)
141		strncpy(c->name, (char *)name.value, sizeof(c->name));
142	else {
143		if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
144				&& n > 0 && *list)
145		{
146			strncpy(c->name, *list, sizeof(c->name));
147			XFreeStringList(list);
148		}
149	}
150	XFree(name.value);
151	resize_title(c);
152}
153
154void
155update_size(Client *c)
156{
157	XSizeHints size;
158	long msize;
159	if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
160		size.flags = PSize;
161	c->flags = size.flags;
162	if(c->flags & PBaseSize) {
163		c->basew = size.base_width;
164		c->baseh = size.base_height;
165	}
166	else
167		c->basew = c->baseh = 0;
168	if(c->flags & PResizeInc) {
169		c->incw = size.width_inc;
170		c->inch = size.height_inc;
171	}
172	else
173		c->incw = c->inch = 0;
174	if(c->flags & PMaxSize) {
175		c->maxw = size.max_width;
176		c->maxh = size.max_height;
177	}
178	else
179		c->maxw = c->maxh = 0;
180	if(c->flags & PMinSize) {
181		c->minw = size.min_width;
182		c->minh = size.min_height;
183	}
184	else
185		c->minw = c->minh = 0;
186	if(c->flags & PWinGravity)
187		c->grav = size.win_gravity;
188	else
189		c->grav = NorthWestGravity;
190}
191
192void
193raise(Client *c)
194{
195	XRaiseWindow(dpy, c->win);
196	XRaiseWindow(dpy, c->title);
197}
198
199void
200lower(Client *c)
201{
202	XLowerWindow(dpy, c->title);
203	XLowerWindow(dpy, c->win);
204}
205
206void
207focus(Client *c)
208{
209	Client **l, *old;
210
211	old = stack;
212	for(l = &stack; *l && *l != c; l = &(*l)->snext);
213	if(*l)
214		*l = c->snext;
215	c->snext = stack;
216	stack = c;
217	if(old && old != c) {
218		XMapWindow(dpy, old->title);
219		draw_client(old);
220	}
221	XUnmapWindow(dpy, c->title);
222	draw_client(c);
223	XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
224	XFlush(dpy);
225}
226
227void
228manage(Window w, XWindowAttributes *wa)
229{
230	Client *c, **l;
231	XSetWindowAttributes twa;
232
233	c = emallocz(sizeof(Client));
234	c->win = w;
235	c->tx = c->x = wa->x;
236	c->ty = c->y = wa->y;
237	if(c->y < bh)
238		c->ty = c->y += bh;
239	c->tw = c->w = wa->width;
240	c->h = wa->height;
241	c->th = bh;
242	c->border = 1;
243	update_size(c);
244	XSetWindowBorderWidth(dpy, c->win, 1);
245	XSetWindowBorder(dpy, c->win, brush.border);
246	XSelectInput(dpy, c->win,
247			StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
248	XGetTransientForHint(dpy, c->win, &c->trans);
249	twa.override_redirect = 1;
250	twa.background_pixmap = ParentRelative;
251	twa.event_mask = ExposureMask;
252
253	c->tags[tsel] = tags[tsel];
254	c->title = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
255			0, DefaultDepth(dpy, screen), CopyFromParent,
256			DefaultVisual(dpy, screen),
257			CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
258
259	update_name(c);
260	for(l=&clients; *l; l=&(*l)->next);
261	c->next = *l; /* *l == nil */
262	*l = c;
263	XMapRaised(dpy, c->win);
264	XMapRaised(dpy, c->title);
265	XGrabButton(dpy, Button1, Mod1Mask, c->win, False, ButtonPressMask,
266			GrabModeAsync, GrabModeSync, None, None);
267	XGrabButton(dpy, Button2, Mod1Mask, c->win, False, ButtonPressMask,
268			GrabModeAsync, GrabModeSync, None, None);
269	XGrabButton(dpy, Button3, Mod1Mask, c->win, False, ButtonPressMask,
270			GrabModeAsync, GrabModeSync, None, None);
271	arrange(NULL);
272	focus(c);
273}
274
275void
276gravitate(Client *c, Bool invert)
277{
278	int dx = 0, dy = 0;
279
280	switch(c->grav) {
281	case StaticGravity:
282	case NorthWestGravity:
283	case NorthGravity:
284	case NorthEastGravity:
285		dy = c->border;
286		break;
287	case EastGravity:
288	case CenterGravity:
289	case WestGravity:
290		dy = -(c->h / 2) + c->border;
291		break;
292	case SouthEastGravity:
293	case SouthGravity:
294	case SouthWestGravity:
295		dy = -c->h;
296		break;
297	default:
298		break;
299	}
300
301	switch (c->grav) {
302	case StaticGravity:
303	case NorthWestGravity:
304	case WestGravity:
305	case SouthWestGravity:
306		dx = c->border;
307		break;
308	case NorthGravity:
309	case CenterGravity:
310	case SouthGravity:
311		dx = -(c->w / 2) + c->border;
312		break;
313	case NorthEastGravity:
314	case EastGravity:
315	case SouthEastGravity:
316		dx = -(c->w + c->border);
317		break;
318	default:
319		break;
320	}
321
322	if(invert) {
323		dx = -dx;
324		dy = -dy;
325	}
326	c->x += dx;
327	c->y += dy;
328}
329
330
331void
332resize(Client *c)
333{
334	XConfigureEvent e;
335
336	if(c->incw)
337		c->w -= (c->w - c->basew) % c->incw;
338	if(c->inch)
339		c->h -= (c->h - c->baseh) % c->inch;
340	if(c->minw && c->w < c->minw)
341		c->w = c->minw;
342	if(c->minh && c->h < c->minh)
343		c->h = c->minh;
344	if(c->maxw && c->w > c->maxw)
345		c->w = c->maxw;
346	if(c->maxh && c->h > c->maxh)
347		c->h = c->maxh;
348	resize_title(c);
349	XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
350	e.type = ConfigureNotify;
351	e.event = c->win;
352	e.window = c->win;
353	e.x = c->x;
354	e.y = c->y;
355	e.width = c->w;
356	e.height = c->h;
357	e.border_width = c->border;
358	e.above = None;
359	e.override_redirect = False;
360	XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&e);
361	XFlush(dpy);
362}
363
364static int
365dummy_error_handler(Display *dpy, XErrorEvent *error)
366{
367	return 0;
368}
369
370void
371unmanage(Client *c)
372{
373	Client **l;
374
375	XGrabServer(dpy);
376	XSetErrorHandler(dummy_error_handler);
377
378	XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
379	XDestroyWindow(dpy, c->title);
380
381	for(l=&clients; *l && *l != c; l=&(*l)->next);
382	eassert(*l == c);
383	*l = c->next;
384	for(l=&stack; *l && *l != c; l=&(*l)->snext);
385	eassert(*l == c);
386	*l = c->snext;
387	free(c);
388
389	XFlush(dpy);
390	XSetErrorHandler(error_handler);
391	XUngrabServer(dpy);
392	arrange(NULL);
393	if(stack)
394		focus(stack);
395}
396
397Client *
398gettitle(Window w)
399{
400	Client *c;
401	for(c = clients; c; c = c->next)
402		if(c->title == w)
403			return c;
404	return NULL;
405}
406
407Client *
408getclient(Window w)
409{
410	Client *c;
411	for(c = clients; c; c = c->next)
412		if(c->win == w)
413			return c;
414	return NULL;
415}
416
417void
418draw_client(Client *c)
419{
420	int i;
421	if(c == stack) {
422		draw_bar();
423		return;
424	}
425
426	brush.x = brush.y = 0;
427	brush.h = c->th;
428
429	brush.w = 0;
430	for(i = 0; i < TLast; i++) {
431		if(c->tags[i]) {
432			brush.x += brush.w;
433			brush.w = textw(&brush.font, c->tags[i]) + bh;
434			draw(dpy, &brush, True, c->tags[i]);
435		}
436	}
437	brush.x += brush.w;
438	brush.w = textw(&brush.font, c->name) + bh;
439	draw(dpy, &brush, True, c->name);
440	XCopyArea(dpy, brush.drawable, c->title, brush.gc,
441			0, 0, c->tw, c->th, 0, 0);
442	XFlush(dpy);
443}