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 configure(Client *c) {
 101         XConfigureEvent ce;
 102
 103         ce.type = ConfigureNotify;
 104         ce.display = dpy;
 105         ce.event = c->win;
 106         ce.window = c->win;
 107         ce.x = c->x;
 108         ce.y = c->y;
 109         ce.width = c->w;
 110         ce.height = c->h;
 111         ce.border_width = c->border;
 112         ce.above = None;
 113         ce.override_redirect = False;
 114         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 115 }
 116
 117 void
 118 detach(Client *c) {
 119         if(c->prev)
 120                 c->prev->next = c->next;
 121         if(c->next)
 122                 c->next->prev = c->prev;
 123         if(c == clients)
 124                 clients = c->next;
 125         c->next = c->prev = NULL;
 126 }
 127
 128 void
 129 focus(Client *c) {
 130         if((!c && selscreen)|| (c && !isvisible(c)))
 131                 for(c = stack; c && !isvisible(c); c = c->snext);
 132         if(sel && sel != c) {
 133                 grabbuttons(sel, False);
 134                 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
 135         }
 136         if(c) {
 137                 detachstack(c);
 138                 attachstack(c);
 139                 grabbuttons(c, True);
 140         }
 141         sel = c;
 142         drawstatus();
 143         if(!selscreen)
 144                 return;
 145         if(c) {
 146                 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
 147                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 148         }
 149         else
 150                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 151 }
 152
 153 void
 154 killclient(const char *arg) {
 155         XEvent ev;
 156
 157         if(!sel)
 158                 return;
 159         if(isprotodel(sel)) {
 160                 ev.type = ClientMessage;
 161                 ev.xclient.window = sel->win;
 162                 ev.xclient.message_type = wmatom[WMProtocols];
 163                 ev.xclient.format = 32;
 164                 ev.xclient.data.l[0] = wmatom[WMDelete];
 165                 ev.xclient.data.l[1] = CurrentTime;
 166                 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
 167         }
 168         else
 169                 XKillClient(dpy, sel->win);
 170 }
 171
 172 void
 173 manage(Window w, XWindowAttributes *wa) {
 174         Client *c, *t = NULL;
 175         Window trans;
 176         Status rettrans;
 177         XWindowChanges wc;
 178
 179         c = emallocz(sizeof(Client));
 180         c->tags = emallocz(ntags * sizeof(Bool));
 181         c->win = w;
 182         c->x = wa->x;
 183         c->y = wa->y;
 184         c->w = wa->width;
 185         c->h = wa->height;
 186         c->oldborder = wa->border_width;
 187         if(c->w == sw && c->h == sh) {
 188                 c->x = sx;
 189                 c->y = sy;
 190                 c->border = wa->border_width;
 191         }
 192         else {
 193                 if(c->x + c->w + 2 * c->border > wax + waw)
 194                         c->x = wax + waw - c->w - 2 * c->border;
 195                 if(c->y + c->h + 2 * c->border > way + wah)
 196                         c->y = way + wah - c->h - 2 * c->border;
 197                 if(c->x < wax)
 198                         c->x = wax;
 199                 if(c->y < way)
 200                         c->y = way;
 201                 c->border = BORDERPX;
 202         }
 203         wc.border_width = c->border;
 204         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
 205         XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
 206         configure(c); /* propagates border_width, if size doesn't change */
 207         updatesizehints(c);
 208         XSelectInput(dpy, w,
 209                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 210         grabbuttons(c, False);
 211         updatetitle(c);
 212         if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
 213                 for(t = clients; t && t->win != trans; t = t->next);
 214         settags(c, t);
 215         if(!c->isfloating)
 216                 c->isfloating = (rettrans == Success) || c->isfixed;
 217         attach(c);
 218         attachstack(c);
 219         ban(c);
 220         XMapWindow(dpy, w);
 221         setclientstate(c, NormalState);
 222         focus(c);
 223         lt->arrange();
 224 }
 225
 226 void
 227 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
 228         float dx, dy, max, min, ratio;
 229         XWindowChanges wc;
 230
 231         if(w <= 0 || h <= 0)
 232                 return;
 233         if(sizehints) {
 234                 if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0) {
 235                         dx = (float)(w - c->basew);
 236                         dy = (float)(h - c->baseh);
 237                         min = (float)(c->minax) / (float)(c->minay);
 238                         max = (float)(c->maxax) / (float)(c->maxay);
 239                         ratio = dx / dy;
 240                         if(max > 0 && min > 0 && ratio > 0) {
 241                                 if(ratio < min) {
 242                                         dy = (dx * min + dy) / (min * min + 1);
 243                                         dx = dy * min;
 244                                         w = (int)dx + c->basew;
 245                                         h = (int)dy + c->baseh;
 246                                 }
 247                                 else if(ratio > max) {
 248                                         dy = (dx * min + dy) / (max * max + 1);
 249                                         dx = dy * min;
 250                                         w = (int)dx + c->basew;
 251                                         h = (int)dy + c->baseh;
 252                                 }
 253                         }
 254                 }
 255                 if(c->minw && w < c->minw)
 256                         w = c->minw;
 257                 if(c->minh && h < c->minh)
 258                         h = c->minh;
 259                 if(c->maxw && w > c->maxw)
 260                         w = c->maxw;
 261                 if(c->maxh && h > c->maxh)
 262                         h = c->maxh;
 263                 if(c->incw)
 264                         w -= (w - c->basew) % c->incw;
 265                 if(c->inch)
 266                         h -= (h - c->baseh) % c->inch;
 267         }
 268         if(w <= 0 || h <= 0)
 269                 return;
 270         /* offscreen appearance fixes */
 271         if(x > sw)
 272                 x = sw - w - 2 * c->border;
 273         if(y > sh)
 274                 y = sh - h - 2 * c->border;
 275         if(x + w + 2 * c->border < sx)
 276                 x = sx;
 277         if(y + h + 2 * c->border < sy)
 278                 y = sy;
 279         if(c->x != x || c->y != y || c->w != w || c->h != h) {
 280                 c->x = wc.x = x;
 281                 c->y = wc.y = y;
 282                 c->w = wc.width = w;
 283                 c->h = wc.height = h;
 284                 wc.border_width = c->border;
 285                 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 286                 configure(c);
 287                 XSync(dpy, False);
 288         }
 289 }
 290
 291 void
 292 togglefloating(const char *arg) {
 293         if(!sel || lt->arrange == floating)
 294                 return;
 295         sel->isfloating = !sel->isfloating;
 296         if(sel->isfloating)
 297                 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
 298         lt->arrange();
 299 }
 300
 301 void
 302 updatesizehints(Client *c) {
 303         long msize;
 304         XSizeHints size;
 305
 306         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 307                 size.flags = PSize;
 308         c->flags = size.flags;
 309         if(c->flags & PBaseSize) {
 310                 c->basew = size.base_width;
 311                 c->baseh = size.base_height;
 312         }
 313         else if(c->flags & PMinSize) {
 314                 c->basew = size.min_width;
 315                 c->baseh = size.min_height;
 316         }
 317         else
 318                 c->basew = c->baseh = 0;
 319         if(c->flags & PResizeInc) {
 320                 c->incw = size.width_inc;
 321                 c->inch = size.height_inc;
 322         }
 323         else
 324                 c->incw = c->inch = 0;
 325         if(c->flags & PMaxSize) {
 326                 c->maxw = size.max_width;
 327                 c->maxh = size.max_height;
 328         }
 329         else
 330                 c->maxw = c->maxh = 0;
 331         if(c->flags & PMinSize) {
 332                 c->minw = size.min_width;
 333                 c->minh = size.min_height;
 334         }
 335         else if(c->flags & PBaseSize) {
 336                 c->minw = size.base_width;
 337                 c->minh = size.base_height;
 338         }
 339         else
 340                 c->minw = c->minh = 0;
 341         if(c->flags & PAspect) {
 342                 c->minax = size.min_aspect.x;
 343                 c->maxax = size.max_aspect.x;
 344                 c->minay = size.min_aspect.y;
 345                 c->maxay = size.max_aspect.y;
 346         }
 347         else
 348                 c->minax = c->maxax = c->minay = c->maxay = 0;
 349         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
 350                         && c->maxw == c->minw && c->maxh == c->minh);
 351 }
 352
 353 void
 354 updatetitle(Client *c) {
 355         char **list = NULL;
 356         int n;
 357         XTextProperty name;
 358
 359         name.nitems = 0;
 360         c->name[0] = 0;
 361         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 362         if(!name.nitems)
 363                 XGetWMName(dpy, c->win, &name);
 364         if(!name.nitems)
 365                 return;
 366         if(name.encoding == XA_STRING)
 367                 strncpy(c->name, (char *)name.value, sizeof c->name - 1);
 368         else {
 369                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 370                 && n > 0 && *list)
 371                 {
 372                         strncpy(c->name, *list, sizeof c->name - 1);
 373                         XFreeStringList(list);
 374                 }
 375         }
 376         c->name[sizeof c->name - 1] = '\0';
 377         XFree(name.value);
 378 }
 379
 380 void
 381 unmanage(Client *c) {
 382         XWindowChanges wc;
 383
 384         wc.border_width = c->oldborder;
 385         /* The server grab construct avoids race conditions. */
 386         XGrabServer(dpy);
 387         XSetErrorHandler(xerrordummy);
 388         XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
 389         detach(c);
 390         detachstack(c);
 391         if(sel == c)
 392                 focus(NULL);
 393         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 394         setclientstate(c, WithdrawnState);
 395         free(c->tags);
 396         free(c);
 397         XSync(dpy, False);
 398         XSetErrorHandler(xerror);
 399         XUngrabServer(dpy);
 400         lt->arrange();
 401 }