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#include <X11/Xutil.h>
 11
 12#include "wm.h"
 13
 14static void floating(void);
 15static void tiling(void);
 16static void (*arrange)(void) = tiling;
 17
 18void
 19max(void *aux)
 20{
 21	if(!stack)
 22		return;
 23	stack->x = sx;
 24	stack->y = sy;
 25	stack->w = sw - 2 * stack->border;
 26	stack->h = sh - 2 * stack->border;
 27	resize(stack);
 28	discard_events(EnterWindowMask);
 29}
 30
 31static void
 32floating(void)
 33{
 34	Client *c;
 35
 36	for(c = stack; c; c = c->snext)
 37		resize(c);
 38	discard_events(EnterWindowMask);
 39}
 40
 41static void
 42tiling(void)
 43{
 44	Client *c;
 45	int n, cols, rows, gw, gh, i, j;
 46    float rt, fd;
 47
 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 - 2) / rows;
 63
 64	for(i = j = 0, c = clients; c; c = c->next) {
 65		c->x = i * gw;
 66		c->y = j * gh;
 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
 79toggle(void *aux)
 80{
 81	if(arrange == floating)
 82		arrange = tiling;
 83	else
 84		arrange = floating;
 85	arrange();
 86}
 87
 88
 89void
 90sel(void *aux)
 91{
 92	const char *arg = aux;
 93	Client *c = NULL;
 94
 95	if(!arg || !stack)
 96		return;
 97	if(!strncmp(arg, "next", 5))
 98		c = stack->snext ? stack->snext : stack;
 99	else if(!strncmp(arg, "prev", 5))
100		for(c = stack; c && c->snext; c = c->snext);
101	if(!c)
102		c = stack;
103	craise(c);
104	focus(c);
105}
106
107void
108ckill(void *aux)
109{
110	Client *c = stack;
111
112	if(!c)
113		return;
114	if(c->proto & WM_PROTOCOL_DELWIN)
115		send_message(c->win, wm_atom[WMProtocols], wm_atom[WMDelete]);
116	else
117		XKillClient(dpy, c->win);
118}
119
120static void
121resize_title(Client *c)
122{
123	int i;
124
125	c->tw = 0;
126	for(i = 0; i < TLast; i++)
127		if(c->tags[i])
128			c->tw += textw(&dc.font, c->tags[i]) + dc.font.height;
129	c->tw += textw(&dc.font, c->name) + dc.font.height;
130	if(c->tw > c->w)
131		c->tw = c->w + 2;
132	c->tx = c->x + c->w - c->tw + 2;
133	c->ty = c->y;
134	XMoveResizeWindow(dpy, c->title, c->tx, c->ty, c->tw, c->th);
135}
136
137void
138update_name(Client *c)
139{
140	XTextProperty name;
141	int n;
142	char **list = NULL;
143
144	name.nitems = 0;
145	c->name[0] = 0;
146	XGetTextProperty(dpy, c->win, &name, net_atom[NetWMName]);
147	if(!name.nitems)
148		XGetWMName(dpy, c->win, &name);
149	if(!name.nitems)
150		return;
151	if(name.encoding == XA_STRING)
152		strncpy(c->name, (char *)name.value, sizeof(c->name));
153	else {
154		if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
155				&& n > 0 && *list)
156		{
157			strncpy(c->name, *list, sizeof(c->name));
158			XFreeStringList(list);
159		}
160	}
161	XFree(name.value);
162	resize_title(c);
163}
164
165void
166update_size(Client *c)
167{
168	XSizeHints size;
169	long msize;
170	if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
171		size.flags = PSize;
172	c->flags = size.flags;
173	if(c->flags & PBaseSize) {
174		c->basew = size.base_width;
175		c->baseh = size.base_height;
176	}
177	else
178		c->basew = c->baseh = 0;
179	if(c->flags & PResizeInc) {
180		c->incw = size.width_inc;
181		c->inch = size.height_inc;
182	}
183	else
184		c->incw = c->inch = 0;
185	if(c->flags & PMaxSize) {
186		c->maxw = size.max_width;
187		c->maxh = size.max_height;
188	}
189	else
190		c->maxw = c->maxh = 0;
191	if(c->flags & PMinSize) {
192		c->minw = size.min_width;
193		c->minh = size.min_height;
194	}
195	else
196		c->minw = c->minh = 0;
197	if(c->flags & PWinGravity)
198		c->grav = size.win_gravity;
199	else
200		c->grav = NorthWestGravity;
201}
202
203void
204craise(Client *c)
205{
206	XRaiseWindow(dpy, c->win);
207	XRaiseWindow(dpy, c->title);
208}
209
210void
211lower(Client *c)
212{
213	XLowerWindow(dpy, c->title);
214	XLowerWindow(dpy, c->win);
215}
216
217void
218focus(Client *c)
219{
220	Client **l, *old;
221
222	old = stack;
223	for(l = &stack; *l && *l != c; l = &(*l)->snext);
224	if(*l)
225		*l = c->snext;
226	c->snext = stack;
227	stack = c;
228	if(old && old != c) {
229		XMapWindow(dpy, old->title);
230		draw_client(old);
231	}
232	XUnmapWindow(dpy, c->title);
233	draw_client(c);
234	XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
235	XFlush(dpy);
236}
237
238void
239manage(Window w, XWindowAttributes *wa)
240{
241	Client *c, **l;
242	XSetWindowAttributes twa;
243
244	c = emallocz(sizeof(Client));
245	c->win = w;
246	c->tx = c->x = wa->x;
247	c->ty = c->y = wa->y;
248	c->tw = c->w = wa->width;
249	c->h = wa->height;
250	c->th = th;
251	c->border = 1;
252	update_size(c);
253	XSetWindowBorderWidth(dpy, c->win, 1);
254	XSetWindowBorder(dpy, c->win, dc.border);
255	XSelectInput(dpy, c->win,
256			StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
257	XGetTransientForHint(dpy, c->win, &c->trans);
258	twa.override_redirect = 1;
259	twa.background_pixmap = ParentRelative;
260	twa.event_mask = ExposureMask;
261
262	c->tags[tsel] = tags[tsel];
263	c->title = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
264			0, DefaultDepth(dpy, screen), CopyFromParent,
265			DefaultVisual(dpy, screen),
266			CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
267
268	update_name(c);
269	for(l=&clients; *l; l=&(*l)->next);
270	c->next = *l; /* *l == nil */
271	*l = c;
272	XMapRaised(dpy, c->win);
273	XMapRaised(dpy, c->title);
274	XGrabButton(dpy, Button1, Mod1Mask, c->win, False, ButtonPressMask,
275			GrabModeAsync, GrabModeSync, None, None);
276	XGrabButton(dpy, Button2, Mod1Mask, c->win, False, ButtonPressMask,
277			GrabModeAsync, GrabModeSync, None, None);
278	XGrabButton(dpy, Button3, Mod1Mask, c->win, False, ButtonPressMask,
279			GrabModeAsync, GrabModeSync, None, None);
280	arrange();
281	focus(c);
282}
283
284void
285gravitate(Client *c, Bool invert)
286{
287	int dx = 0, dy = 0;
288
289	switch(c->grav) {
290	case StaticGravity:
291	case NorthWestGravity:
292	case NorthGravity:
293	case NorthEastGravity:
294		dy = c->border;
295		break;
296	case EastGravity:
297	case CenterGravity:
298	case WestGravity:
299		dy = -(c->h / 2) + c->border;
300		break;
301	case SouthEastGravity:
302	case SouthGravity:
303	case SouthWestGravity:
304		dy = -c->h;
305		break;
306	default:
307		break;
308	}
309
310	switch (c->grav) {
311	case StaticGravity:
312	case NorthWestGravity:
313	case WestGravity:
314	case SouthWestGravity:
315		dx = c->border;
316		break;
317	case NorthGravity:
318	case CenterGravity:
319	case SouthGravity:
320		dx = -(c->w / 2) + c->border;
321		break;
322	case NorthEastGravity:
323	case EastGravity:
324	case SouthEastGravity:
325		dx = -(c->w + c->border);
326		break;
327	default:
328		break;
329	}
330
331	if(invert) {
332		dx = -dx;
333		dy = -dy;
334	}
335	c->x += dx;
336	c->y += dy;
337}
338
339
340void
341resize(Client *c)
342{
343	XConfigureEvent e;
344
345	if(c->incw)
346		c->w -= (c->w - c->basew) % c->incw;
347	if(c->inch)
348		c->h -= (c->h - c->baseh) % c->inch;
349	if(c->minw && c->w < c->minw)
350		c->w = c->minw;
351	if(c->minh && c->h < c->minh)
352		c->h = c->minh;
353	if(c->maxw && c->w > c->maxw)
354		c->w = c->maxw;
355	if(c->maxh && c->h > c->maxh)
356		c->h = c->maxh;
357	resize_title(c);
358	XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
359	e.type = ConfigureNotify;
360	e.event = c->win;
361	e.window = c->win;
362	e.x = c->x;
363	e.y = c->y;
364	e.width = c->w;
365	e.height = c->h;
366	e.border_width = c->border;
367	e.above = None;
368	e.override_redirect = False;
369	XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&e);
370	XFlush(dpy);
371}
372
373static int
374dummy_error_handler(Display *dsply, XErrorEvent *err)
375{
376	return 0;
377}
378
379void
380unmanage(Client *c)
381{
382	Client **l;
383
384	XGrabServer(dpy);
385	XSetErrorHandler(dummy_error_handler);
386
387	XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
388	XDestroyWindow(dpy, c->title);
389
390	for(l=&clients; *l && *l != c; l=&(*l)->next);
391	*l = c->next;
392	for(l=&stack; *l && *l != c; l=&(*l)->snext);
393	*l = c->snext;
394	free(c);
395
396	XFlush(dpy);
397	XSetErrorHandler(error_handler);
398	XUngrabServer(dpy);
399	arrange();
400	if(stack)
401		focus(stack);
402}
403
404Client *
405gettitle(Window w)
406{
407	Client *c;
408	for(c = clients; c; c = c->next)
409		if(c->title == w)
410			return c;
411	return NULL;
412}
413
414Client *
415getclient(Window w)
416{
417	Client *c;
418	for(c = clients; c; c = c->next)
419		if(c->win == w)
420			return c;
421	return NULL;
422}
423
424void
425draw_client(Client *c)
426{
427	int i;
428	if(c == stack)
429		return;
430
431	dc.x = dc.y = 0;
432	dc.h = c->th;
433
434	dc.w = 0;
435	for(i = 0; i < TLast; i++) {
436		if(c->tags[i]) {
437			dc.x += dc.w;
438			dc.w = textw(&dc.font, c->tags[i]) + dc.font.height;
439			draw(True, c->tags[i]);
440		}
441	}
442	dc.x += dc.w;
443	dc.w = textw(&dc.font, c->name) + dc.font.height;
444	draw(True, c->name);
445	XCopyArea(dpy, dc.drawable, c->title, dc.gc,
446			0, 0, c->tw, c->th, 0, 0);
447	XFlush(dpy);
448}