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