client.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include "dwm.h"
   3 #include <stdlib.h>
   4 #include <X11/Xutil.h>
   5
   6 /* static */
   7
   8 static void
   9 attachstack(Client *c) {
  10         c->snext = stack;
  11         stack = c;
  12 }
  13
  14 static void
  15 detachstack(Client *c) {
  16         Client **tc;
  17
  18         for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
  19         *tc = c->snext;
  20 }
  21
  22 static void
  23 grabbuttons(Client *c, Bool focused) {
  24         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
  25
  26         if(focused) {
  27                 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
  28                                 GrabModeAsync, GrabModeSync, None, None);
  29                 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
  30                                 GrabModeAsync, GrabModeSync, None, None);
  31                 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  32                                 GrabModeAsync, GrabModeSync, None, None);
  33                 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  34                                 GrabModeAsync, GrabModeSync, None, None);
  35
  36                 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
  37                                 GrabModeAsync, GrabModeSync, None, None);
  38                 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
  39                                 GrabModeAsync, GrabModeSync, None, None);
  40                 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  41                                 GrabModeAsync, GrabModeSync, None, None);
  42                 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  43                                 GrabModeAsync, GrabModeSync, None, None);
  44
  45                 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
  46                                 GrabModeAsync, GrabModeSync, None, None);
  47                 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
  48                                 GrabModeAsync, GrabModeSync, None, None);
  49                 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  50                                 GrabModeAsync, GrabModeSync, None, None);
  51                 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  52                                 GrabModeAsync, GrabModeSync, None, None);
  53         }
  54         else
  55                 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
  56                                 GrabModeAsync, GrabModeSync, None, None);
  57 }
  58
  59 static Bool
  60 isprotodel(Client *c) {
  61         int i, n;
  62         Atom *protocols;
  63         Bool ret = False;
  64
  65         if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
  66                 for(i = 0; !ret && i < n; i++)
  67                         if(protocols[i] == wmatom[WMDelete])
  68                                 ret = True;
  69                 XFree(protocols);
  70         }
  71         return ret;
  72 }
  73
  74 static void
  75 setclientstate(Client *c, long state) {
  76         long data[] = {state, None};
  77
  78         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
  79                         PropModeReplace, (unsigned char *)data, 2);
  80 }
  81
  82 static int
  83 xerrordummy(Display *dsply, XErrorEvent *ee) {
  84         return 0;
  85 }
  86
  87 /* extern */
  88
  89 void
  90 attach(Client *c) {
  91         if(clients)
  92                 clients->prev = c;
  93         c->next = clients;
  94         clients = c;
  95 }
  96
  97 void
  98 ban(Client *c) {
  99         if(c->isbanned)
 100                 return;
 101         XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
 102         c->isbanned = True;
 103 }
 104
 105 void
 106 configure(Client *c) {
 107         XConfigureEvent ce;
 108
 109         ce.type = ConfigureNotify;
 110         ce.display = dpy;
 111         ce.event = c->win;
 112         ce.window = c->win;
 113         ce.x = c->x;
 114         ce.y = c->y;
 115         ce.width = c->w;
 116         ce.height = c->h;
 117         ce.border_width = c->border;
 118         ce.above = None;
 119         ce.override_redirect = False;
 120         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 121 }
 122
 123 void
 124 detach(Client *c) {
 125         if(c->prev)
 126                 c->prev->next = c->next;
 127         if(c->next)
 128                 c->next->prev = c->prev;
 129         if(c == clients)
 130                 clients = c->next;
 131         c->next = c->prev = NULL;
 132 }
 133
 134 void
 135 focus(Client *c) {
 136         if((!c && selscreen) || (c && !isvisible(c)))
 137                 for(c = stack; c && !isvisible(c); c = c->snext);
 138         if(sel && sel != c) {
 139                 grabbuttons(sel, False);
 140                 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
 141         }
 142         if(c) {
 143                 detachstack(c);
 144                 attachstack(c);
 145                 grabbuttons(c, True);
 146         }
 147         sel = c;
 148         drawstatus();
 149         if(!selscreen)
 150                 return;
 151         if(c) {
 152                 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
 153                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 154         }
 155         else
 156                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 157 }
 158
 159 void
 160 killclient(const char *arg) {
 161         XEvent ev;
 162
 163         if(!sel)
 164                 return;
 165         if(isprotodel(sel)) {
 166                 ev.type = ClientMessage;
 167                 ev.xclient.window = sel->win;
 168                 ev.xclient.message_type = wmatom[WMProtocols];
 169                 ev.xclient.format = 32;
 170                 ev.xclient.data.l[0] = wmatom[WMDelete];
 171                 ev.xclient.data.l[1] = CurrentTime;
 172                 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
 173         }
 174         else
 175                 XKillClient(dpy, sel->win);
 176 }
 177
 178 void
 179 manage(Window w, XWindowAttributes *wa) {
 180         unsigned int i;
 181         Client *c, *t = NULL;
 182         Window trans;
 183         Status rettrans;
 184         XWindowChanges wc;
 185
 186         c = emallocz(sizeof(Client));
 187         c->tags = emallocz(ntags * sizeof(Bool));
 188         c->win = w;
 189         c->x = wa->x;
 190         c->y = wa->y;
 191         c->w = wa->width;
 192         c->h = wa->height;
 193         c->oldborder = wa->border_width;
 194         if(c->w == sw && c->h == sh) {
 195                 c->x = sx;
 196                 c->y = sy;
 197                 c->border = wa->border_width;
 198         }
 199         else {
 200                 if(c->x + c->w + 2 * c->border > wax + waw)
 201                         c->x = wax + waw - c->w - 2 * c->border;
 202                 if(c->y + c->h + 2 * c->border > way + wah)
 203                         c->y = way + wah - c->h - 2 * c->border;
 204                 if(c->x < wax)
 205                         c->x = wax;
 206                 if(c->y < way)
 207                         c->y = way;
 208                 c->border = BORDERPX;
 209         }
 210         wc.border_width = c->border;
 211         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
 212         XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
 213         configure(c); /* propagates border_width, if size doesn't change */
 214         updatesizehints(c);
 215         XSelectInput(dpy, w,
 216                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 217         grabbuttons(c, False);
 218         updatetitle(c);
 219         if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
 220                 for(t = clients; t && t->win != trans; t = t->next);
 221         if(t)
 222                 for(i = 0; i < ntags; i++)
 223                         c->tags[i] = t->tags[i];
 224         applyrules(c);
 225         if(!c->isfloating)
 226                 c->isfloating = (rettrans == Success) || c->isfixed;
 227         attach(c);
 228         attachstack(c);
 229         XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
 230         ban(c);
 231         XMapWindow(dpy, c->win);
 232         arrange();
 233 }
 234
 235 void
 236 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
 237         double dx, dy, max, min, ratio;
 238         XWindowChanges wc;
 239
 240         if(sizehints) {
 241                 if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0 && (w - c->basew) > 0) {
 242                         dx = (double)(w - c->basew);
 243                         dy = (double)(h - c->baseh);
 244                         min = (double)(c->minax) / (double)(c->minay);
 245                         max = (double)(c->maxax) / (double)(c->maxay);
 246                         ratio = dx / dy;
 247                         if(max > 0 && min > 0 && ratio > 0) {
 248                                 if(ratio < min) {
 249                                         dy = (dx * min + dy) / (min * min + 1);
 250                                         dx = dy * min;
 251                                         w = (int)dx + c->basew;
 252                                         h = (int)dy + c->baseh;
 253                                 }
 254                                 else if(ratio > max) {
 255                                         dy = (dx * min + dy) / (max * max + 1);
 256                                         dx = dy * min;
 257                                         w = (int)dx + c->basew;
 258                                         h = (int)dy + c->baseh;
 259                                 }
 260                         }
 261                 }
 262                 if(c->minw && w < c->minw)
 263                         w = c->minw;
 264                 if(c->minh && h < c->minh)
 265                         h = c->minh;
 266                 if(c->maxw && w > c->maxw)
 267                         w = c->maxw;
 268                 if(c->maxh && h > c->maxh)
 269                         h = c->maxh;
 270                 if(c->incw)
 271                         w -= (w - c->basew) % c->incw;
 272                 if(c->inch)
 273                         h -= (h - c->baseh) % c->inch;
 274         }
 275         if(w <= 0 || h <= 0)
 276                 return;
 277         /* offscreen appearance fixes */
 278         if(x > sw)
 279                 x = sw - w - 2 * c->border;
 280         if(y > sh)
 281                 y = sh - h - 2 * c->border;
 282         if(x + w + 2 * c->border < sx)
 283                 x = sx;
 284         if(y + h + 2 * c->border < sy)
 285                 y = sy;
 286         if(c->x != x || c->y != y || c->w != w || c->h != h) {
 287                 c->x = wc.x = x;
 288                 c->y = wc.y = y;
 289                 c->w = wc.width = w;
 290                 c->h = wc.height = h;
 291                 wc.border_width = c->border;
 292                 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 293                 configure(c);
 294                 XSync(dpy, False);
 295         }
 296 }
 297
 298 void
 299 unban(Client *c) {
 300         if(!c->isbanned)
 301                 return;
 302         XMoveWindow(dpy, c->win, c->x, c->y);
 303         c->isbanned = False;
 304 }
 305
 306 void
 307 unmanage(Client *c) {
 308         XWindowChanges wc;
 309
 310         wc.border_width = c->oldborder;
 311         /* The server grab construct avoids race conditions. */
 312         XGrabServer(dpy);
 313         XSetErrorHandler(xerrordummy);
 314         XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
 315         detach(c);
 316         detachstack(c);
 317         if(sel == c)
 318                 focus(NULL);
 319         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 320         setclientstate(c, WithdrawnState);
 321         free(c->tags);
 322         free(c);
 323         XSync(dpy, False);
 324         XSetErrorHandler(xerror);
 325         XUngrabServer(dpy);
 326         arrange();
 327 }
 328
 329 void
 330 updatesizehints(Client *c) {
 331         long msize;
 332         XSizeHints size;
 333
 334         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 335                 size.flags = PSize;
 336         c->flags = size.flags;
 337         if(c->flags & PBaseSize) {
 338                 c->basew = size.base_width;
 339                 c->baseh = size.base_height;
 340         }
 341         else if(c->flags & PMinSize) {
 342                 c->basew = size.min_width;
 343                 c->baseh = size.min_height;
 344         }
 345         else
 346                 c->basew = c->baseh = 0;
 347         if(c->flags & PResizeInc) {
 348                 c->incw = size.width_inc;
 349                 c->inch = size.height_inc;
 350         }
 351         else
 352                 c->incw = c->inch = 0;
 353         if(c->flags & PMaxSize) {
 354                 c->maxw = size.max_width;
 355                 c->maxh = size.max_height;
 356         }
 357         else
 358                 c->maxw = c->maxh = 0;
 359         if(c->flags & PMinSize) {
 360                 c->minw = size.min_width;
 361                 c->minh = size.min_height;
 362         }
 363         else if(c->flags & PBaseSize) {
 364                 c->minw = size.base_width;
 365                 c->minh = size.base_height;
 366         }
 367         else
 368                 c->minw = c->minh = 0;
 369         if(c->flags & PAspect) {
 370                 c->minax = size.min_aspect.x;
 371                 c->maxax = size.max_aspect.x;
 372                 c->minay = size.min_aspect.y;
 373                 c->maxay = size.max_aspect.y;
 374         }
 375         else
 376                 c->minax = c->maxax = c->minay = c->maxay = 0;
 377         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
 378                         && c->maxw == c->minw && c->maxh == c->minh);
 379 }
 380
 381 void
 382 updatetitle(Client *c) {
 383         if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
 384                 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
 385 }