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 "dwm.h"
 13
 14static void (*arrange)(void *) = floating;
 15
 16void
 17max(void *aux)
 18{
 19	if(!stack)
 20		return;
 21	stack->x = sx;
 22	stack->y = sy;
 23	stack->w = sw - 2 * stack->border;
 24	stack->h = sh - 2 * stack->border;
 25	craise(stack);
 26	resize(stack);
 27	discard_events(EnterWindowMask);
 28}
 29
 30void
 31floating(void *aux)
 32{
 33	Client *c;
 34
 35	arrange = floating;
 36	for(c = stack; c; c = c->snext)
 37		resize(c);
 38	discard_events(EnterWindowMask);
 39}
 40
 41void
 42tiling(void *aux)
 43{
 44	Client *c;
 45	int n, cols, rows, gw, gh, i, j;
 46    float rt, fd;
 47
 48	arrange = tiling;
 49	if(!clients)
 50		return;
 51	for(n = 0, c = clients; c; c = c->next, n++);
 52	rt = sqrt(n);
 53	if(modff(rt, &fd) < 0.5)
 54		rows = floor(rt);
 55	else
 56		rows = ceil(rt);
 57	if(rows * rows < n)
 58		cols = rows + 1;
 59	else
 60		cols = rows;
 61
 62	gw = (sw - 2)  / cols;
 63	gh = (sh - 2) / rows;
 64
 65	for(i = j = 0, c = clients; c; c = c->next) {
 66		c->x = i * gw;
 67		c->y = j * gh;
 68		c->w = gw;
 69		c->h = gh;
 70		resize(c);
 71		if(++i == cols) {
 72			j++;
 73			i = 0;
 74		}
 75	}
 76	discard_events(EnterWindowMask);
 77}
 78
 79void
 80sel(void *aux)
 81{
 82	const char *arg = aux;
 83	Client *c = NULL;
 84
 85	if(!arg || !stack)
 86		return;
 87	if(!strncmp(arg, "next", 5))
 88		c = stack->snext ? stack->snext : stack;
 89	else if(!strncmp(arg, "prev", 5))
 90		for(c = stack; c && c->snext; c = c->snext);
 91	if(!c)
 92		c = stack;
 93	craise(c);
 94	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w / 2, c->h / 2);
 95	focus(c);
 96}
 97
 98void
 99ckill(void *aux)
100{
101	Client *c = stack;
102
103	if(!c)
104		return;
105	if(c->proto & WM_PROTOCOL_DELWIN)
106		send_message(c->win, wm_atom[WMProtocols], wm_atom[WMDelete]);
107	else
108		XKillClient(dpy, c->win);
109}
110
111static void
112resize_title(Client *c)
113{
114	int i;
115
116	c->tw = 0;
117	for(i = 0; i < TLast; i++)
118		if(c->tags[i])
119			c->tw += textw(c->tags[i]) + dc.font.height;
120	c->tw += textw(c->name) + dc.font.height;
121	if(c->tw > c->w)
122		c->tw = c->w + 2;
123	c->tx = c->x + c->w - c->tw + 2;
124	c->ty = c->y;
125	XMoveResizeWindow(dpy, c->title, c->tx, c->ty, c->tw, c->th);
126}
127
128void
129update_name(Client *c)
130{
131	XTextProperty name;
132	int n;
133	char **list = NULL;
134
135	name.nitems = 0;
136	c->name[0] = 0;
137	XGetTextProperty(dpy, c->win, &name, net_atom[NetWMName]);
138	if(!name.nitems)
139		XGetWMName(dpy, c->win, &name);
140	if(!name.nitems)
141		return;
142	if(name.encoding == XA_STRING)
143		strncpy(c->name, (char *)name.value, sizeof(c->name));
144	else {
145		if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
146				&& n > 0 && *list)
147		{
148			strncpy(c->name, *list, sizeof(c->name));
149			XFreeStringList(list);
150		}
151	}
152	XFree(name.value);
153	resize_title(c);
154}
155
156void
157update_size(Client *c)
158{
159	XSizeHints size;
160	long msize;
161	if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
162		size.flags = PSize;
163	c->flags = size.flags;
164	if(c->flags & PBaseSize) {
165		c->basew = size.base_width;
166		c->baseh = size.base_height;
167	}
168	else
169		c->basew = c->baseh = 0;
170	if(c->flags & PResizeInc) {
171		c->incw = size.width_inc;
172		c->inch = size.height_inc;
173	}
174	else
175		c->incw = c->inch = 0;
176	if(c->flags & PMaxSize) {
177		c->maxw = size.max_width;
178		c->maxh = size.max_height;
179	}
180	else
181		c->maxw = c->maxh = 0;
182	if(c->flags & PMinSize) {
183		c->minw = size.min_width;
184		c->minh = size.min_height;
185	}
186	else
187		c->minw = c->minh = 0;
188	if(c->flags & PWinGravity)
189		c->grav = size.win_gravity;
190	else
191		c->grav = NorthWestGravity;
192}
193
194void
195craise(Client *c)
196{
197	XRaiseWindow(dpy, c->win);
198	XRaiseWindow(dpy, c->title);
199}
200
201void
202lower(Client *c)
203{
204	XLowerWindow(dpy, c->title);
205	XLowerWindow(dpy, c->win);
206}
207
208void
209focus(Client *c)
210{
211	Client **l, *old;
212
213	old = stack;
214	for(l = &stack; *l && *l != c; l = &(*l)->snext);
215	if(*l)
216		*l = c->snext;
217	c->snext = stack;
218	stack = c;
219	if(old && old != c) {
220		XSetWindowBorder(dpy, old->win, dc.bg);
221		XMapWindow(dpy, old->title);
222		draw_client(old);
223	}
224	XUnmapWindow(dpy, c->title);
225	XSetWindowBorder(dpy, c->win, dc.fg);
226	draw_client(c);
227	XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
228	XFlush(dpy);
229	discard_events(EnterWindowMask);
230}
231
232void
233manage(Window w, XWindowAttributes *wa)
234{
235	Client *c, **l;
236	XSetWindowAttributes twa;
237
238	c = emallocz(sizeof(Client));
239	c->win = w;
240	c->tx = c->x = wa->x;
241	c->ty = c->y = wa->y;
242	c->tw = c->w = wa->width;
243	c->h = wa->height;
244	c->th = th;
245	c->border = 1;
246	update_size(c);
247	XSelectInput(dpy, c->win,
248			StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
249	XGetTransientForHint(dpy, c->win, &c->trans);
250	twa.override_redirect = 1;
251	twa.background_pixmap = ParentRelative;
252	twa.event_mask = ExposureMask;
253
254	c->tags[tsel] = tags[tsel];
255	c->title = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
256			0, DefaultDepth(dpy, screen), CopyFromParent,
257			DefaultVisual(dpy, screen),
258			CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
259
260	update_name(c);
261	for(l=&clients; *l; l=&(*l)->next);
262	c->next = *l; /* *l == nil */
263	*l = c;
264	XSetWindowBorderWidth(dpy, c->win, 1);
265	XMapRaised(dpy, c->win);
266	XMapRaised(dpy, c->title);
267	XGrabButton(dpy, Button1, Mod1Mask, c->win, False, ButtonPressMask,
268			GrabModeAsync, GrabModeSync, None, None);
269	XGrabButton(dpy, Button2, Mod1Mask, c->win, False, ButtonPressMask,
270			GrabModeAsync, GrabModeSync, None, None);
271	XGrabButton(dpy, Button3, Mod1Mask, c->win, False, ButtonPressMask,
272			GrabModeAsync, GrabModeSync, None, None);
273	arrange(NULL);
274	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w / 2, c->h / 2);
275	focus(c);
276}
277
278void
279gravitate(Client *c, Bool invert)
280{
281	int dx = 0, dy = 0;
282
283	switch(c->grav) {
284	case StaticGravity:
285	case NorthWestGravity:
286	case NorthGravity:
287	case NorthEastGravity:
288		dy = c->border;
289		break;
290	case EastGravity:
291	case CenterGravity:
292	case WestGravity:
293		dy = -(c->h / 2) + c->border;
294		break;
295	case SouthEastGravity:
296	case SouthGravity:
297	case SouthWestGravity:
298		dy = -c->h;
299		break;
300	default:
301		break;
302	}
303
304	switch (c->grav) {
305	case StaticGravity:
306	case NorthWestGravity:
307	case WestGravity:
308	case SouthWestGravity:
309		dx = c->border;
310		break;
311	case NorthGravity:
312	case CenterGravity:
313	case SouthGravity:
314		dx = -(c->w / 2) + c->border;
315		break;
316	case NorthEastGravity:
317	case EastGravity:
318	case SouthEastGravity:
319		dx = -(c->w + c->border);
320		break;
321	default:
322		break;
323	}
324
325	if(invert) {
326		dx = -dx;
327		dy = -dy;
328	}
329	c->x += dx;
330	c->y += dy;
331}
332
333
334void
335resize(Client *c)
336{
337	XConfigureEvent e;
338
339	if(c->incw)
340		c->w -= (c->w - c->basew) % c->incw;
341	if(c->inch)
342		c->h -= (c->h - c->baseh) % c->inch;
343	if(c->minw && c->w < c->minw)
344		c->w = c->minw;
345	if(c->minh && c->h < c->minh)
346		c->h = c->minh;
347	if(c->maxw && c->w > c->maxw)
348		c->w = c->maxw;
349	if(c->maxh && c->h > c->maxh)
350		c->h = c->maxh;
351	resize_title(c);
352	XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
353	e.type = ConfigureNotify;
354	e.event = c->win;
355	e.window = c->win;
356	e.x = c->x;
357	e.y = c->y;
358	e.width = c->w;
359	e.height = c->h;
360	e.border_width = c->border;
361	e.above = None;
362	e.override_redirect = False;
363	XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&e);
364	XFlush(dpy);
365}
366
367static int
368dummy_error_handler(Display *dsply, XErrorEvent *err)
369{
370	return 0;
371}
372
373void
374unmanage(Client *c)
375{
376	Client **l;
377
378	XGrabServer(dpy);
379	XSetErrorHandler(dummy_error_handler);
380
381	XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
382	XDestroyWindow(dpy, c->title);
383
384	for(l=&clients; *l && *l != c; l=&(*l)->next);
385	*l = c->next;
386	for(l=&stack; *l && *l != c; l=&(*l)->snext);
387	*l = c->snext;
388	free(c);
389
390	XFlush(dpy);
391	XSetErrorHandler(error_handler);
392	XUngrabServer(dpy);
393	arrange(NULL);
394	if(stack)
395		focus(stack);
396}
397
398Client *
399gettitle(Window w)
400{
401	Client *c;
402	for(c = clients; c; c = c->next)
403		if(c->title == w)
404			return c;
405	return NULL;
406}
407
408Client *
409getclient(Window w)
410{
411	Client *c;
412	for(c = clients; c; c = c->next)
413		if(c->win == w)
414			return c;
415	return NULL;
416}
417
418void
419draw_client(Client *c)
420{
421	int i;
422	if(c == stack)
423		return;
424
425	dc.x = dc.y = 0;
426	dc.h = c->th;
427
428	dc.w = 0;
429	for(i = 0; i < TLast; i++) {
430		if(c->tags[i]) {
431			dc.x += dc.w;
432			dc.w = textw(c->tags[i]) + dc.font.height;
433			draw(True, c->tags[i]);
434		}
435	}
436	dc.x += dc.w;
437	dc.w = textw(c->name) + dc.font.height;
438	draw(True, c->name);
439	XCopyArea(dpy, dc.drawable, c->title, dc.gc,
440			0, 0, c->tw, c->th, 0, 0);
441	XFlush(dpy);
442}