client.c (view raw)
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 */
11
12static void
13attachstack(Client *c) {
14 c->snext = stack;
15 stack = c;
16}
17
18static void
19detachstack(Client *c) {
20 Client **tc;
21
22 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
23 *tc = c->snext;
24}
25
26static void
27grabbuttons(Client *c, Bool focused) {
28 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
29
30 if(focused) {
31 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
32 GrabModeAsync, GrabModeSync, None, None);
33 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
34 GrabModeAsync, GrabModeSync, None, None);
35 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
36 GrabModeAsync, GrabModeSync, None, None);
37 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
38 GrabModeAsync, GrabModeSync, None, None);
39
40 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
41 GrabModeAsync, GrabModeSync, None, None);
42 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
43 GrabModeAsync, GrabModeSync, None, None);
44 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
45 GrabModeAsync, GrabModeSync, None, None);
46 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
47 GrabModeAsync, GrabModeSync, None, None);
48
49 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
50 GrabModeAsync, GrabModeSync, None, None);
51 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
52 GrabModeAsync, GrabModeSync, None, None);
53 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
54 GrabModeAsync, GrabModeSync, None, None);
55 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
56 GrabModeAsync, GrabModeSync, None, None);
57 }
58 else
59 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
60 GrabModeAsync, GrabModeSync, None, None);
61}
62
63static Bool
64isprotodel(Client *c) {
65 int i, n;
66 Atom *protocols;
67 Bool ret = False;
68
69 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
70 for(i = 0; !ret && i < n; i++)
71 if(protocols[i] == wmatom[WMDelete])
72 ret = True;
73 XFree(protocols);
74 }
75 return ret;
76}
77
78static void
79setclientstate(Client *c, long state) {
80 long data[] = {state, None};
81
82 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
83 PropModeReplace, (unsigned char *)data, 2);
84}
85
86static void
87togglemax(Client *c) {
88 XEvent ev;
89
90 if(c->isfixed)
91 return;
92 if((c->ismax = !c->ismax)) {
93 c->rx = c->x;
94 c->ry = c->y;
95 c->rw = c->w;
96 c->rh = c->h;
97 resize(c, wax, way, waw - 2 * BORDERPX, wah - 2 * BORDERPX, True);
98 }
99 else
100 resize(c, c->rx, c->ry, c->rw, c->rh, True);
101 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
102}
103
104static int
105xerrordummy(Display *dsply, XErrorEvent *ee) {
106 return 0;
107}
108
109/* extern */
110
111void
112attach(Client *c) {
113 if(clients)
114 clients->prev = c;
115 c->next = clients;
116 clients = c;
117}
118
119void
120configure(Client *c) {
121 XConfigureEvent ce;
122
123 ce.type = ConfigureNotify;
124 ce.display = dpy;
125 ce.event = c->win;
126 ce.window = c->win;
127 ce.x = c->x;
128 ce.y = c->y;
129 ce.width = c->w;
130 ce.height = c->h;
131 ce.border_width = c->border;
132 ce.above = None;
133 ce.override_redirect = False;
134 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
135}
136
137void
138detach(Client *c) {
139 if(c->prev)
140 c->prev->next = c->next;
141 if(c->next)
142 c->next->prev = c->prev;
143 if(c == clients)
144 clients = c->next;
145 c->next = c->prev = NULL;
146}
147
148void
149focus(Client *c) {
150 if(c && !isvisible(c))
151 return;
152 if(sel && sel != c) {
153 grabbuttons(sel, False);
154 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
155 }
156 if(c) {
157 detachstack(c);
158 attachstack(c);
159 grabbuttons(c, True);
160 }
161 sel = c;
162 drawstatus();
163 if(!selscreen)
164 return;
165 if(c) {
166 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
167 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
168 }
169 else
170 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
171}
172
173void
174focusnext(Arg *arg) {
175 Client *c;
176
177 if(!sel)
178 return;
179 for(c = sel->next; c && !isvisible(c); c = c->next);
180 if(!c)
181 for(c = clients; c && !isvisible(c); c = c->next);
182 if(c) {
183 focus(c);
184 restack();
185 }
186}
187
188void
189focusprev(Arg *arg) {
190 Client *c;
191
192 if(!sel)
193 return;
194 for(c = sel->prev; c && !isvisible(c); c = c->prev);
195 if(!c) {
196 for(c = clients; c && c->next; c = c->next);
197 for(; c && !isvisible(c); c = c->prev);
198 }
199 if(c) {
200 focus(c);
201 restack();
202 }
203}
204
205void
206killclient(Arg *arg) {
207 if(!sel)
208 return;
209 if(isprotodel(sel))
210 sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
211 else
212 XKillClient(dpy, sel->win);
213}
214
215void
216manage(Window w, XWindowAttributes *wa) {
217 Client *c, *t;
218 Window trans;
219 XWindowChanges wc;
220
221 c = emallocz(sizeof(Client));
222 c->tags = emallocz(ntags * sizeof(Bool));
223 c->win = w;
224 c->x = wa->x;
225 c->y = wa->y;
226 c->w = wa->width;
227 c->h = wa->height;
228 if(c->w == sw && c->h == sh) {
229 c->border = 0;
230 c->x = sx;
231 c->y = sy;
232 }
233 else {
234 c->border = BORDERPX;
235 if(c->x + c->w + 2 * c->border > wax + waw)
236 c->x = wax + waw - c->w - 2 * c->border;
237 if(c->y + c->h + 2 * c->border > way + wah)
238 c->y = way + wah - c->h - 2 * c->border;
239 if(c->x < wax)
240 c->x = wax;
241 if(c->y < way)
242 c->y = way;
243 }
244 updatesizehints(c);
245 XSelectInput(dpy, w,
246 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
247 XGetTransientForHint(dpy, w, &trans);
248 grabbuttons(c, False);
249 wc.border_width = c->border;
250 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
251 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
252 configure(c); /* propagates border_width, if size doesn't change */
253 updatetitle(c);
254 for(t = clients; t && t->win != trans; t = t->next);
255 settags(c, t);
256 if(!c->isfloat)
257 c->isfloat = (t != NULL) || c->isfixed;
258 attach(c);
259 attachstack(c);
260 c->isbanned = True;
261 XMoveWindow(dpy, w, c->x + 2 * sw, c->y);
262 XMapWindow(dpy, w);
263 setclientstate(c, NormalState);
264 if(isvisible(c))
265 focus(c);
266 lt->arrange();
267}
268
269Client *
270nexttiled(Client *c) {
271 for(; c && (c->isfloat || !isvisible(c)); c = c->next);
272 return c;
273}
274
275void
276resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
277 float actual, dx, dy, max, min;
278 XWindowChanges wc;
279
280 if(w <= 0 || h <= 0)
281 return;
282 if(sizehints) {
283 if(c->minw && w < c->minw)
284 w = c->minw;
285 if(c->minh && h < c->minh)
286 h = c->minh;
287 if(c->maxw && w > c->maxw)
288 w = c->maxw;
289 if(c->maxh && h > c->maxh)
290 h = c->maxh;
291 /* inspired by algorithm from fluxbox */
292 if(c->minay > 0 && c->maxay && (h - c->baseh) > 0) {
293 dx = (float)(w - c->basew);
294 dy = (float)(h - c->baseh);
295 min = (float)(c->minax) / (float)(c->minay);
296 max = (float)(c->maxax) / (float)(c->maxay);
297 actual = dx / dy;
298 if(max > 0 && min > 0 && actual > 0) {
299 if(actual < min) {
300 dy = (dx * min + dy) / (min * min + 1);
301 dx = dy * min;
302 w = (int)dx + c->basew;
303 h = (int)dy + c->baseh;
304 }
305 else if(actual > max) {
306 dy = (dx * min + dy) / (max * max + 1);
307 dx = dy * min;
308 w = (int)dx + c->basew;
309 h = (int)dy + c->baseh;
310 }
311 }
312 }
313 if(c->incw)
314 w -= (w - c->basew) % c->incw;
315 if(c->inch)
316 h -= (h - c->baseh) % c->inch;
317 }
318 if(w == sw && h == sh)
319 c->border = 0;
320 else
321 c->border = BORDERPX;
322 /* offscreen appearance fixes */
323 if(x > sw)
324 x = sw - w - 2 * c->border;
325 if(y > sh)
326 y = sh - h - 2 * c->border;
327 if(x + w + 2 * c->border < sx)
328 x = sx;
329 if(y + h + 2 * c->border < sy)
330 y = sy;
331 if(c->x != x || c->y != y || c->w != w || c->h != h) {
332 c->x = wc.x = x;
333 c->y = wc.y = y;
334 c->w = wc.width = w;
335 c->h = wc.height = h;
336 wc.border_width = c->border;
337 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
338 configure(c);
339 XSync(dpy, False);
340 }
341}
342
343void
344updatesizehints(Client *c) {
345 long msize;
346 XSizeHints size;
347
348 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
349 size.flags = PSize;
350 c->flags = size.flags;
351 if(c->flags & PBaseSize) {
352 c->basew = size.base_width;
353 c->baseh = size.base_height;
354 }
355 else
356 c->basew = c->baseh = 0;
357 if(c->flags & PResizeInc) {
358 c->incw = size.width_inc;
359 c->inch = size.height_inc;
360 }
361 else
362 c->incw = c->inch = 0;
363 if(c->flags & PMaxSize) {
364 c->maxw = size.max_width;
365 c->maxh = size.max_height;
366 }
367 else
368 c->maxw = c->maxh = 0;
369 if(c->flags & PMinSize) {
370 c->minw = size.min_width;
371 c->minh = size.min_height;
372 }
373 else
374 c->minw = c->minh = 0;
375 if(c->flags & PAspect) {
376 c->minax = size.min_aspect.x;
377 c->minay = size.min_aspect.y;
378 c->maxax = size.max_aspect.x;
379 c->maxay = size.max_aspect.y;
380 }
381 else
382 c->minax = c->minay = c->maxax = c->maxay = 0;
383 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
384 && c->maxw == c->minw && c->maxh == c->minh);
385}
386
387void
388updatetitle(Client *c) {
389 char **list = NULL;
390 int n;
391 XTextProperty name;
392
393 name.nitems = 0;
394 c->name[0] = 0;
395 XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
396 if(!name.nitems)
397 XGetWMName(dpy, c->win, &name);
398 if(!name.nitems)
399 return;
400 if(name.encoding == XA_STRING)
401 strncpy(c->name, (char *)name.value, sizeof c->name);
402 else {
403 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
404 && n > 0 && *list)
405 {
406 strncpy(c->name, *list, sizeof c->name);
407 XFreeStringList(list);
408 }
409 }
410 XFree(name.value);
411}
412
413void
414unmanage(Client *c) {
415 Client *nc;
416
417 /* The server grab construct avoids race conditions. */
418 XGrabServer(dpy);
419 XSetErrorHandler(xerrordummy);
420 detach(c);
421 detachstack(c);
422 if(sel == c) {
423 for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
424 focus(nc);
425 }
426 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
427 setclientstate(c, WithdrawnState);
428 free(c->tags);
429 free(c);
430 XSync(dpy, False);
431 XSetErrorHandler(xerror);
432 XUngrabServer(dpy);
433 lt->arrange();
434}
435
436void
437zoom(Arg *arg) {
438 unsigned int n;
439 Client *c;
440
441 if(!sel)
442 return;
443 if(sel->isfloat || (lt->arrange == dofloat)) {
444 togglemax(sel);
445 return;
446 }
447 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
448 n++;
449 if((c = sel) == nexttiled(clients))
450 if(!(c = nexttiled(c->next)))
451 return;
452 detach(c);
453 attach(c);
454 focus(c);
455 lt->arrange();
456}