2403d749652f866cd942448910b0a9ece7352d1a
[dwm.git] / client.c
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
14 static void (*arrange)(Arg *) = floating;
15
16 static Client *
17 next(Client *c)
18 {
19         for(c = c->next; c && !c->tags[tsel]; c = c->next);
20         return c;
21 }
22
23 static Client *
24 prev(Client *c)
25 {
26         for(c = c->prev; c && !c->tags[tsel]; c = c->prev);
27         return c;
28 }
29
30 void
31 max(Arg *arg)
32 {
33         if(!csel)
34                 return;
35         csel->x = sx;
36         csel->y = sy;
37         csel->w = sw - 2 * csel->border;
38         csel->h = sh - 2 * csel->border;
39         craise(csel);
40         resize(csel);
41         discard_events(EnterWindowMask);
42 }
43
44 void
45 tag(Arg *arg)
46 {
47         if(!csel)
48                 return;
49
50         if(arg->i == tsel)
51                 return;
52
53         if(csel->tags[arg->i])
54                 csel->tags[arg->i] = NULL; /* toggle tag */
55         else
56                 csel->tags[arg->i] = tags[arg->i];
57         arrange(NULL);
58 }
59
60 void
61 floating(Arg *arg)
62 {
63         Client *c;
64
65         arrange = floating;
66         if(!csel)
67                 return;
68         for(c = csel; c; c = next(c))
69                 resize(c);
70         discard_events(EnterWindowMask);
71 }
72
73 void
74 tiling(Arg *arg)
75 {
76         Client *c;
77         int n, cols, rows, gw, gh, i, j;
78     float rt, fd;
79
80         arrange = tiling;
81         if(!csel)
82                 return;
83         for(n = 0, c = csel; c; c = next(c), n++);
84         rt = sqrt(n);
85         if(modff(rt, &fd) < 0.5)
86                 rows = floor(rt);
87         else
88                 rows = ceil(rt);
89         if(rows * rows < n)
90                 cols = rows + 1;
91         else
92                 cols = rows;
93
94         gw = (sw - 2)  / cols;
95         gh = (sh - 2) / rows;
96
97         for(i = j = 0, c = csel; c; c = next(c)) {
98                 c->x = i * gw;
99                 c->y = j * gh;
100                 c->w = gw;
101                 c->h = gh;
102                 resize(c);
103                 if(++i == cols) {
104                         j++;
105                         i = 0;
106                 }
107         }
108         discard_events(EnterWindowMask);
109 }
110
111 void
112 prevc(Arg *arg)
113 {
114         Client *c;
115
116         if(!csel)
117                 return;
118
119         if(!(c = prev(csel)))
120                 c = prev(cend);
121         if(c) {
122                 craise(c);
123                 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w / 2, c->h / 2);
124                 focus(c);
125         }
126 }
127
128 void
129 nextc(Arg *arg)
130 {
131         Client *c;
132    
133         if(!csel)
134                 return;
135
136         if(!(c = next(csel)))
137                 c = next(cstart);
138
139         if(c) {
140                 craise(c);
141                 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w / 2, c->h / 2);
142                 focus(c);
143         }
144 }
145
146 void
147 ckill(Arg *arg)
148 {
149         Client *c = csel;
150
151         if(!c)
152                 return;
153         if(c->proto & WM_PROTOCOL_DELWIN)
154                 send_message(c->win, wm_atom[WMProtocols], wm_atom[WMDelete]);
155         else
156                 XKillClient(dpy, c->win);
157 }
158
159 static void
160 resize_title(Client *c)
161 {
162         int i;
163
164         c->tw = 0;
165         for(i = 0; i < TLast; i++)
166                 if(c->tags[i])
167                         c->tw += textw(c->tags[i]) + dc.font.height;
168         c->tw += textw(c->name) + dc.font.height;
169         if(c->tw > c->w)
170                 c->tw = c->w + 2;
171         c->tx = c->x + c->w - c->tw + 2;
172         c->ty = c->y;
173         XMoveResizeWindow(dpy, c->title, c->tx, c->ty, c->tw, c->th);
174 }
175
176 void
177 update_name(Client *c)
178 {
179         XTextProperty name;
180         int n;
181         char **list = NULL;
182
183         name.nitems = 0;
184         c->name[0] = 0;
185         XGetTextProperty(dpy, c->win, &name, net_atom[NetWMName]);
186         if(!name.nitems)
187                 XGetWMName(dpy, c->win, &name);
188         if(!name.nitems)
189                 return;
190         if(name.encoding == XA_STRING)
191                 strncpy(c->name, (char *)name.value, sizeof(c->name));
192         else {
193                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
194                                 && n > 0 && *list)
195                 {
196                         strncpy(c->name, *list, sizeof(c->name));
197                         XFreeStringList(list);
198                 }
199         }
200         XFree(name.value);
201         resize_title(c);
202 }
203
204 void
205 update_size(Client *c)
206 {
207         XSizeHints size;
208         long msize;
209         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
210                 size.flags = PSize;
211         c->flags = size.flags;
212         if(c->flags & PBaseSize) {
213                 c->basew = size.base_width;
214                 c->baseh = size.base_height;
215         }
216         else
217                 c->basew = c->baseh = 0;
218         if(c->flags & PResizeInc) {
219                 c->incw = size.width_inc;
220                 c->inch = size.height_inc;
221         }
222         else
223                 c->incw = c->inch = 0;
224         if(c->flags & PMaxSize) {
225                 c->maxw = size.max_width;
226                 c->maxh = size.max_height;
227         }
228         else
229                 c->maxw = c->maxh = 0;
230         if(c->flags & PMinSize) {
231                 c->minw = size.min_width;
232                 c->minh = size.min_height;
233         }
234         else
235                 c->minw = c->minh = 0;
236         if(c->flags & PWinGravity)
237                 c->grav = size.win_gravity;
238         else
239                 c->grav = NorthWestGravity;
240 }
241
242 void
243 craise(Client *c)
244 {
245         XRaiseWindow(dpy, c->win);
246         XRaiseWindow(dpy, c->title);
247 }
248
249 void
250 lower(Client *c)
251 {
252         XLowerWindow(dpy, c->title);
253         XLowerWindow(dpy, c->win);
254 }
255
256 void
257 focus(Client *c)
258 {
259         if(csel && csel != c) {
260                 XSetWindowBorder(dpy, csel->win, dc.bg);
261                 XMapWindow(dpy, csel->title);
262                 draw_client(csel);
263         }
264         csel = c;
265         XUnmapWindow(dpy, c->title);
266         XSetWindowBorder(dpy, c->win, dc.fg);
267         draw_client(c);
268         XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
269         XFlush(dpy);
270         discard_events(EnterWindowMask);
271 }
272
273 void
274 manage(Window w, XWindowAttributes *wa)
275 {
276         Client *c;
277         XSetWindowAttributes twa;
278
279         c = emallocz(sizeof(Client));
280         c->win = w;
281         c->tx = c->x = wa->x;
282         c->ty = c->y = wa->y;
283         c->tw = c->w = wa->width;
284         c->h = wa->height;
285         c->th = th;
286         c->border = 1;
287         update_size(c);
288         XSelectInput(dpy, c->win,
289                         StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
290         XGetTransientForHint(dpy, c->win, &c->trans);
291         twa.override_redirect = 1;
292         twa.background_pixmap = ParentRelative;
293         twa.event_mask = ExposureMask;
294
295         c->tags[tsel] = tags[tsel];
296         c->title = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
297                         0, DefaultDepth(dpy, screen), CopyFromParent,
298                         DefaultVisual(dpy, screen),
299                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
300
301         update_name(c);
302
303         if(!cstart)
304                 cstart = cend = c;
305         else {
306                 cend->next = c;
307                 c->prev = cend;
308                 cend = c;
309         }
310
311         XSetWindowBorderWidth(dpy, c->win, 1);
312         XMapRaised(dpy, c->win);
313         XMapRaised(dpy, c->title);
314         XGrabButton(dpy, Button1, Mod1Mask, c->win, False, ButtonPressMask,
315                         GrabModeAsync, GrabModeSync, None, None);
316         XGrabButton(dpy, Button2, Mod1Mask, c->win, False, ButtonPressMask,
317                         GrabModeAsync, GrabModeSync, None, None);
318         XGrabButton(dpy, Button3, Mod1Mask, c->win, False, ButtonPressMask,
319                         GrabModeAsync, GrabModeSync, None, None);
320         arrange(NULL);
321         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w / 2, c->h / 2);
322         focus(c);
323 }
324
325 void
326 gravitate(Client *c, Bool invert)
327 {
328         int dx = 0, dy = 0;
329
330         switch(c->grav) {
331         case StaticGravity:
332         case NorthWestGravity:
333         case NorthGravity:
334         case NorthEastGravity:
335                 dy = c->border;
336                 break;
337         case EastGravity:
338         case CenterGravity:
339         case WestGravity:
340                 dy = -(c->h / 2) + c->border;
341                 break;
342         case SouthEastGravity:
343         case SouthGravity:
344         case SouthWestGravity:
345                 dy = -c->h;
346                 break;
347         default:
348                 break;
349         }
350
351         switch (c->grav) {
352         case StaticGravity:
353         case NorthWestGravity:
354         case WestGravity:
355         case SouthWestGravity:
356                 dx = c->border;
357                 break;
358         case NorthGravity:
359         case CenterGravity:
360         case SouthGravity:
361                 dx = -(c->w / 2) + c->border;
362                 break;
363         case NorthEastGravity:
364         case EastGravity:
365         case SouthEastGravity:
366                 dx = -(c->w + c->border);
367                 break;
368         default:
369                 break;
370         }
371
372         if(invert) {
373                 dx = -dx;
374                 dy = -dy;
375         }
376         c->x += dx;
377         c->y += dy;
378 }
379
380
381 void
382 resize(Client *c)
383 {
384         XConfigureEvent e;
385
386         if(c->incw)
387                 c->w -= (c->w - c->basew) % c->incw;
388         if(c->inch)
389                 c->h -= (c->h - c->baseh) % c->inch;
390         if(c->minw && c->w < c->minw)
391                 c->w = c->minw;
392         if(c->minh && c->h < c->minh)
393                 c->h = c->minh;
394         if(c->maxw && c->w > c->maxw)
395                 c->w = c->maxw;
396         if(c->maxh && c->h > c->maxh)
397                 c->h = c->maxh;
398         resize_title(c);
399         XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
400         e.type = ConfigureNotify;
401         e.event = c->win;
402         e.window = c->win;
403         e.x = c->x;
404         e.y = c->y;
405         e.width = c->w;
406         e.height = c->h;
407         e.border_width = c->border;
408         e.above = None;
409         e.override_redirect = False;
410         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&e);
411         XFlush(dpy);
412 }
413
414 static int
415 dummy_error_handler(Display *dsply, XErrorEvent *err)
416 {
417         return 0;
418 }
419
420 void
421 unmanage(Client *c)
422 {
423         XGrabServer(dpy);
424         XSetErrorHandler(dummy_error_handler);
425
426         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
427         XDestroyWindow(dpy, c->title);
428
429         if(c->prev) {
430                 c->prev->next = c->next;
431                 if(csel == c)
432                         csel = c->prev;
433         }
434         if(c->next) {
435                 c->next->prev = c->prev;
436                 if(csel == c)
437                         csel = c->next;
438         }
439         if(cstart == c)
440                 cstart = c->next;
441         if(cend == c)
442                 cend = c->prev;
443
444         free(c);
445
446         XFlush(dpy);
447         XSetErrorHandler(error_handler);
448         XUngrabServer(dpy);
449         arrange(NULL);
450         if(csel)
451                 focus(csel);
452 }
453
454 Client *
455 gettitle(Window w)
456 {
457         Client *c;
458         for(c = cstart; c; c = c->next)
459                 if(c->title == w)
460                         return c;
461         return NULL;
462 }
463
464 Client *
465 getclient(Window w)
466 {
467         Client *c;
468         for(c = cstart; c; c = c->next)
469                 if(c->win == w)
470                         return c;
471         return NULL;
472 }
473
474 void
475 draw_client(Client *c)
476 {
477         int i;
478         if(c == csel)
479                 return;
480
481         dc.x = dc.y = 0;
482         dc.h = c->th;
483
484         dc.w = 0;
485         for(i = 0; i < TLast; i++) {
486                 if(c->tags[i]) {
487                         dc.x += dc.w;
488                         dc.w = textw(c->tags[i]) + dc.font.height;
489                         draw(True, c->tags[i]);
490                 }
491         }
492         dc.x += dc.w;
493         dc.w = textw(c->name) + dc.font.height;
494         draw(True, c->name);
495         XCopyArea(dpy, dc.drawable, c->title, dc.gc,
496                         0, 0, c->tw, c->th, 0, 0);
497         XFlush(dpy);
498 }