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[dwm.git] / client.c
1 /* See LICENSE file for copyright and license details. */
2 #include "dwm.h"
3 #include <stdlib.h>
4 #include <string.h>
5 #include <X11/Xatom.h>
6 #include <X11/Xutil.h>
7
8 /* static */
9
10 static char prop[128];
11
12 static void
13 attachstack(Client *c) {
14 c->snext = stack;
15 stack = c;
16 }
17
18 static void
19 detachstack(Client *c) {
20 Client **tc;
21
22 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
23 *tc = c->snext;
24 }
25
26 static void
27 grabbuttons(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
63 static Bool
64 isprotodel(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
78 static void
79 setclientstate(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
86 static int
87 xerrordummy(Display *dsply, XErrorEvent *ee) {
88 return 0;
89 }
90
91 /* extern */
92
93 void
94 attach(Client *c) {
95 if(clients)
96 clients->prev = c;
97 c->next = clients;
98 clients = c;
99 }
100
101 void
102 ban(Client *c) {
103 if(c->isbanned)
104 return;
105 XUnmapWindow(dpy, c->win);
106 setclientstate(c, IconicState);
107 c->isbanned = True;
108 c->unmapped++;
109 }
110
111 void
112 configure(Client *c) {
113 XConfigureEvent ce;
114
115 ce.type = ConfigureNotify;
116 ce.display = dpy;
117 ce.event = c->win;
118 ce.window = c->win;
119 ce.x = c->x;
120 ce.y = c->y;
121 ce.width = c->w;
122 ce.height = c->h;
123 ce.border_width = c->border;
124 ce.above = None;
125 ce.override_redirect = False;
126 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
127 }
128
129 void
130 detach(Client *c) {
131 if(c->prev)
132 c->prev->next = c->next;
133 if(c->next)
134 c->next->prev = c->prev;
135 if(c == clients)
136 clients = c->next;
137 c->next = c->prev = NULL;
138 }
139
140 void
141 focus(Client *c) {
142 if((!c && selscreen) || (c && !isvisible(c)))
143 for(c = stack; c && !isvisible(c); c = c->snext);
144 if(sel && sel != c) {
145 grabbuttons(sel, False);
146 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
147 }
148 if(c) {
149 detachstack(c);
150 attachstack(c);
151 grabbuttons(c, True);
152 }
153 sel = c;
154 drawstatus();
155 if(!selscreen)
156 return;
157 if(c) {
158 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
159 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
160 }
161 else
162 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
163 }
164
165 void
166 killclient(const char *arg) {
167 XEvent ev;
168
169 if(!sel)
170 return;
171 if(isprotodel(sel)) {
172 ev.type = ClientMessage;
173 ev.xclient.window = sel->win;
174 ev.xclient.message_type = wmatom[WMProtocols];
175 ev.xclient.format = 32;
176 ev.xclient.data.l[0] = wmatom[WMDelete];
177 ev.xclient.data.l[1] = CurrentTime;
178 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
179 }
180 else
181 XKillClient(dpy, sel->win);
182 }
183
184 Bool
185 loadprops(Client *c) {
186 unsigned int i;
187 Bool result = False;
188 XTextProperty name;
189
190 /* check if window has set a property */
191 name.nitems = 0;
192 XGetTextProperty(dpy, c->win, &name, dwmprops);
193 if(name.nitems && name.encoding == XA_STRING) {
194 strncpy(prop, (char *)name.value, sizeof prop - 1);
195 prop[sizeof prop - 1] = '\0';
196 XFree(name.value);
197 for(i = 0; i < ntags && i < sizeof prop - 1 && prop[i] != '\0'; i++)
198 if((c->tags[i] = prop[i] == '1'))
199 result = True;
200 if(i < sizeof prop - 1 && prop[i] != '\0')
201 c->isfloating = prop[i] == '1';
202 }
203 return result;
204 }
205
206 void
207 manage(Window w, XWindowAttributes *wa) {
208 unsigned int i;
209 Client *c, *t = NULL;
210 Window trans;
211 Status rettrans;
212 XWindowChanges wc;
213
214 c = emallocz(sizeof(Client));
215 c->tags = emallocz(ntags * sizeof(Bool));
216 c->win = w;
217 c->x = wa->x;
218 c->y = wa->y;
219 c->w = wa->width;
220 c->h = wa->height;
221 c->oldborder = wa->border_width;
222 if(c->w == sw && c->h == sh) {
223 c->x = sx;
224 c->y = sy;
225 c->border = wa->border_width;
226 }
227 else {
228 if(c->x + c->w + 2 * c->border > wax + waw)
229 c->x = wax + waw - c->w - 2 * c->border;
230 if(c->y + c->h + 2 * c->border > way + wah)
231 c->y = way + wah - c->h - 2 * c->border;
232 if(c->x < wax)
233 c->x = wax;
234 if(c->y < way)
235 c->y = way;
236 c->border = BORDERPX;
237 }
238 wc.border_width = c->border;
239 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
240 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
241 configure(c); /* propagates border_width, if size doesn't change */
242 updatesizehints(c);
243 XSelectInput(dpy, w,
244 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
245 grabbuttons(c, False);
246 updatetitle(c);
247 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
248 for(t = clients; t && t->win != trans; t = t->next);
249 if(t)
250 for(i = 0; i < ntags; i++)
251 c->tags[i] = t->tags[i];
252 if(!loadprops(c))
253 applyrules(c);
254 if(!c->isfloating)
255 c->isfloating = (rettrans == Success) || c->isfixed;
256 saveprops(c);
257 attach(c);
258 attachstack(c);
259 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
260 ban(c);
261 arrange();
262 }
263
264 void
265 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
266 double dx, dy, max, min, ratio;
267 XWindowChanges wc;
268
269 if(sizehints) {
270 if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0 && (w - c->basew) > 0) {
271 dx = (double)(w - c->basew);
272 dy = (double)(h - c->baseh);
273 min = (double)(c->minax) / (double)(c->minay);
274 max = (double)(c->maxax) / (double)(c->maxay);
275 ratio = dx / dy;
276 if(max > 0 && min > 0 && ratio > 0) {
277 if(ratio < min) {
278 dy = (dx * min + dy) / (min * min + 1);
279 dx = dy * min;
280 w = (int)dx + c->basew;
281 h = (int)dy + c->baseh;
282 }
283 else if(ratio > max) {
284 dy = (dx * min + dy) / (max * max + 1);
285 dx = dy * min;
286 w = (int)dx + c->basew;
287 h = (int)dy + c->baseh;
288 }
289 }
290 }
291 if(c->minw && w < c->minw)
292 w = c->minw;
293 if(c->minh && h < c->minh)
294 h = c->minh;
295 if(c->maxw && w > c->maxw)
296 w = c->maxw;
297 if(c->maxh && h > c->maxh)
298 h = c->maxh;
299 if(c->incw)
300 w -= (w - c->basew) % c->incw;
301 if(c->inch)
302 h -= (h - c->baseh) % c->inch;
303 }
304 if(w <= 0 || h <= 0)
305 return;
306 /* offscreen appearance fixes */
307 if(x > sw)
308 x = sw - w - 2 * c->border;
309 if(y > sh)
310 y = sh - h - 2 * c->border;
311 if(x + w + 2 * c->border < sx)
312 x = sx;
313 if(y + h + 2 * c->border < sy)
314 y = sy;
315 if(c->x != x || c->y != y || c->w != w || c->h != h) {
316 c->x = wc.x = x;
317 c->y = wc.y = y;
318 c->w = wc.width = w;
319 c->h = wc.height = h;
320 wc.border_width = c->border;
321 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
322 configure(c);
323 XSync(dpy, False);
324 }
325 }
326
327 void
328 saveprops(Client *c) {
329 unsigned int i;
330
331 for(i = 0; i < ntags && i < sizeof prop - 1; i++)
332 prop[i] = c->tags[i] ? '1' : '0';
333 if(i < sizeof prop - 1)
334 prop[i++] = c->isfloating ? '1' : '0';
335 prop[i] = '\0';
336 XChangeProperty(dpy, c->win, dwmprops, XA_STRING, 8,
337 PropModeReplace, (unsigned char *)prop, i);
338 }
339
340 void
341 unban(Client *c) {
342 if(!c->isbanned)
343 return;
344 XMapWindow(dpy, c->win);
345 setclientstate(c, NormalState);
346 c->isbanned = False;
347 }
348
349 void
350 unmanage(Client *c, long state) {
351 XWindowChanges wc;
352
353 wc.border_width = c->oldborder;
354 /* The server grab construct avoids race conditions. */
355 XGrabServer(dpy);
356 XSetErrorHandler(xerrordummy);
357 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
358 detach(c);
359 detachstack(c);
360 if(sel == c)
361 focus(NULL);
362 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
363 setclientstate(c, state);
364 free(c->tags);
365 free(c);
366 XSync(dpy, False);
367 XSetErrorHandler(xerror);
368 XUngrabServer(dpy);
369 if(state != NormalState)
370 arrange();
371 }
372
373 void
374 updatesizehints(Client *c) {
375 long msize;
376 XSizeHints size;
377
378 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
379 size.flags = PSize;
380 c->flags = size.flags;
381 if(c->flags & PBaseSize) {
382 c->basew = size.base_width;
383 c->baseh = size.base_height;
384 }
385 else if(c->flags & PMinSize) {
386 c->basew = size.min_width;
387 c->baseh = size.min_height;
388 }
389 else
390 c->basew = c->baseh = 0;
391 if(c->flags & PResizeInc) {
392 c->incw = size.width_inc;
393 c->inch = size.height_inc;
394 }
395 else
396 c->incw = c->inch = 0;
397 if(c->flags & PMaxSize) {
398 c->maxw = size.max_width;
399 c->maxh = size.max_height;
400 }
401 else
402 c->maxw = c->maxh = 0;
403 if(c->flags & PMinSize) {
404 c->minw = size.min_width;
405 c->minh = size.min_height;
406 }
407 else if(c->flags & PBaseSize) {
408 c->minw = size.base_width;
409 c->minh = size.base_height;
410 }
411 else
412 c->minw = c->minh = 0;
413 if(c->flags & PAspect) {
414 c->minax = size.min_aspect.x;
415 c->maxax = size.max_aspect.x;
416 c->minay = size.min_aspect.y;
417 c->maxay = size.max_aspect.y;
418 }
419 else
420 c->minax = c->maxax = c->minay = c->maxay = 0;
421 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
422 && c->maxw == c->minw && c->maxh == c->minh);
423 }
424
425 void
426 updatetitle(Client *c) {
427 char **list = NULL;
428 int n;
429 XTextProperty name;
430
431 name.nitems = 0;
432 c->name[0] = 0;
433 XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
434 if(!name.nitems)
435 XGetWMName(dpy, c->win, &name);
436 if(!name.nitems)
437 return;
438 if(name.encoding == XA_STRING)
439 strncpy(c->name, (char *)name.value, sizeof c->name - 1);
440 else {
441 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
442 && n > 0 && *list)
443 {
444 strncpy(c->name, *list, sizeof c->name - 1);
445 XFreeStringList(list);
446 }
447 }
448 c->name[sizeof c->name - 1] = '\0';
449 XFree(name.value);
450 }