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