1/* (C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
  2 * See LICENSE file for license details.
  3 */
  4#include "dwm.h"
  5#include <stdlib.h>
  6#include <string.h>
  7#include <X11/Xatom.h>
  8#include <X11/Xutil.h>
  9
 10/* static functions */
 11
 12static void
 13detachstack(Client *c) {
 14	Client **tc;
 15	for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
 16	*tc = c->snext;
 17}
 18
 19static void
 20grabbuttons(Client *c, Bool focused) {
 21	XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 22
 23	if(focused) {
 24		XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
 25				GrabModeAsync, GrabModeSync, None, None);
 26		XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
 27				GrabModeAsync, GrabModeSync, None, None);
 28		XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
 29				GrabModeAsync, GrabModeSync, None, None);
 30		XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
 31				GrabModeAsync, GrabModeSync, None, None);
 32
 33		XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
 34				GrabModeAsync, GrabModeSync, None, None);
 35		XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
 36				GrabModeAsync, GrabModeSync, None, None);
 37		XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
 38				GrabModeAsync, GrabModeSync, None, None);
 39		XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
 40				GrabModeAsync, GrabModeSync, None, None);
 41
 42		XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
 43				GrabModeAsync, GrabModeSync, None, None);
 44		XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
 45				GrabModeAsync, GrabModeSync, None, None);
 46		XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
 47				GrabModeAsync, GrabModeSync, None, None);
 48		XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
 49				GrabModeAsync, GrabModeSync, None, None);
 50	}
 51	else
 52		XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
 53				GrabModeAsync, GrabModeSync, None, None);
 54}
 55
 56static int
 57xerrordummy(Display *dsply, XErrorEvent *ee) {
 58	return 0;
 59}
 60
 61/* extern functions */
 62
 63void
 64configure(Client *c) {
 65	XEvent synev;
 66
 67	synev.type = ConfigureNotify;
 68	synev.xconfigure.display = dpy;
 69	synev.xconfigure.event = c->win;
 70	synev.xconfigure.window = c->win;
 71	synev.xconfigure.x = c->x;
 72	synev.xconfigure.y = c->y;
 73	synev.xconfigure.width = c->w;
 74	synev.xconfigure.height = c->h;
 75	synev.xconfigure.border_width = c->border;
 76	synev.xconfigure.above = None;
 77	XSendEvent(dpy, c->win, True, NoEventMask, &synev);
 78}
 79
 80void
 81focus(Client *c) {
 82	Client *old;
 83
 84	if(!issel || (c && !isvisible(c)))
 85		return;
 86	if(!sel)
 87		sel = c;
 88	else if(sel != c) {
 89		old = sel;
 90		sel = c;
 91		if(old) {
 92			grabbuttons(old, False);
 93			XSetWindowBorder(dpy, old->win, dc.norm[ColBorder]);
 94		}
 95	}
 96	if(c) {
 97		detachstack(c);
 98		c->snext = stack;
 99		stack = c;
100		grabbuttons(c, True);
101		XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
102		XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
103	}
104	else
105		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
106	drawstatus();
107}
108
109Client *
110getclient(Window w) {
111	Client *c;
112
113	for(c = clients; c; c = c->next)
114		if(c->win == w)
115			return c;
116	return NULL;
117}
118
119void
120killclient(Arg *arg) {
121	if(!sel)
122		return;
123	if(sel->proto & PROTODELWIN)
124		sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
125	else
126		XKillClient(dpy, sel->win);
127}
128
129void
130manage(Window w, XWindowAttributes *wa) {
131	Client *c;
132	Window trans;
133
134	c = emallocz(sizeof(Client));
135	c->tags = emallocz(ntags * sizeof(Bool));
136	c->win = w;
137	c->border = 0;
138	c->x = wa->x;
139	c->y = wa->y;
140	c->w = wa->width;
141	c->h = wa->height;
142	updatesizehints(c);
143	if(c->x + c->w + 2 * BORDERPX > sw)
144		c->x = sw - c->w - 2 * BORDERPX;
145	if(c->x < sx)
146		c->x = sx;
147	if(c->y + c->h + 2 * BORDERPX > sh)
148		c->y = sh - c->h - 2 * BORDERPX;
149	if(c->h != sh && c->y < bh)
150		c->y = bh;
151	c->proto = getproto(c->win);
152	XSelectInput(dpy, c->win,
153		StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
154	XGetTransientForHint(dpy, c->win, &trans);
155	grabbuttons(c, False);
156	updatetitle(c);
157	settags(c, getclient(trans));
158	if(!c->isfloat)
159		c->isfloat = trans || c->isfixed;
160	if(clients)
161		clients->prev = c;
162	c->next = clients;
163	c->snext = stack;
164	stack = clients = c;
165	XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
166	XMapWindow(dpy, c->win);
167	if(isvisible(c))
168		focus(c);
169	arrange();
170}
171
172void
173resize(Client *c, Bool sizehints, Corner sticky) {
174	int bottom = c->y + c->h;
175	int right = c->x + c->w;
176	XWindowChanges wc;
177
178	if(sizehints) {
179		if(c->incw)
180			c->w -= (c->w - c->basew) % c->incw;
181		if(c->inch)
182			c->h -= (c->h - c->baseh) % c->inch;
183		if(c->minw && c->w < c->minw)
184			c->w = c->minw;
185		if(c->minh && c->h < c->minh)
186			c->h = c->minh;
187		if(c->maxw && c->w > c->maxw)
188			c->w = c->maxw;
189		if(c->maxh && c->h > c->maxh)
190			c->h = c->maxh;
191	}
192	if(sticky == TopRight || sticky == BotRight)
193		c->x = right - c->w;
194	if(sticky == BotLeft || sticky == BotRight)
195		c->y = bottom - c->h;
196	/* offscreen appearance fixes */
197	if(c->x + c->w < sx)
198		c->x = sx;
199	if(c->y + c->h < bh)
200		c->y = bh;
201	if(c->x > sw)
202		c->x = sw - c->w;
203	if(c->y > sh)
204		c->y = sh - c->h;
205	wc.x = c->x;
206	wc.y = c->y;
207	wc.width = c->w;
208	wc.height = c->h;
209	if(c->w == sw && c->h == sh)
210		wc.border_width = 0;
211	else
212		wc.border_width = BORDERPX;
213	XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
214	configure(c);
215	XSync(dpy, False);
216}
217
218void
219updatesizehints(Client *c) {
220	long msize;
221	XSizeHints size;
222
223	if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
224		size.flags = PSize;
225	c->flags = size.flags;
226	if(c->flags & PBaseSize) {
227		c->basew = size.base_width;
228		c->baseh = size.base_height;
229	}
230	else
231		c->basew = c->baseh = 0;
232	if(c->flags & PResizeInc) {
233		c->incw = size.width_inc;
234		c->inch = size.height_inc;
235	}
236	else
237		c->incw = c->inch = 0;
238	if(c->flags & PMaxSize) {
239		c->maxw = size.max_width;
240		c->maxh = size.max_height;
241	}
242	else
243		c->maxw = c->maxh = 0;
244	if(c->flags & PMinSize) {
245		c->minw = size.min_width;
246		c->minh = size.min_height;
247	}
248	else
249		c->minw = c->minh = 0;
250	c->isfixed = (c->maxw && c->minw && c->maxh && c->minh &&
251				c->maxw == c->minw && c->maxh == c->minh);
252}
253
254void
255updatetitle(Client *c) {
256	char **list = NULL;
257	int n;
258	XTextProperty name;
259
260	name.nitems = 0;
261	c->name[0] = 0;
262	XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
263	if(!name.nitems)
264		XGetWMName(dpy, c->win, &name);
265	if(!name.nitems)
266		return;
267	if(name.encoding == XA_STRING)
268		strncpy(c->name, (char *)name.value, sizeof c->name);
269	else {
270		if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
271				&& n > 0 && *list)
272		{
273			strncpy(c->name, *list, sizeof c->name);
274			XFreeStringList(list);
275		}
276	}
277	XFree(name.value);
278}
279
280void
281unmanage(Client *c) {
282	Client *nc;
283
284	/* The server grab construct avoids race conditions. */
285	XGrabServer(dpy);
286	XSetErrorHandler(xerrordummy);
287	detach(c);
288	detachstack(c);
289	if(sel == c) {
290		for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
291		focus(nc);
292	}
293	XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
294	free(c->tags);
295	free(c);
296	XSync(dpy, False);
297	XSetErrorHandler(xerror);
298	XUngrabServer(dpy);
299	arrange();
300}