client.c

   1 /* © 2004-2007 Anselm R. Garbe <garbeam at gmail dot com>
   2  * See LICENSE file for license details. */
   3 #include "dwm.h"
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <X11/Xatom.h>
   7 #include <X11/Xutil.h>
   8
   9 /* static */
  10
  11 static void
  12 attachstack(Client *c) {
  13         c->snext = stack;
  14         stack = c;
  15 }
  16
  17 static void
  18 detachstack(Client *c) {
  19         Client **tc;
  20
  21         for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
  22         *tc = c->snext;
  23 }
  24
  25 static void
  26 grabbuttons(Client *c, Bool focused) {
  27         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
  28
  29         if(focused) {
  30                 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
  31                                 GrabModeAsync, GrabModeSync, None, None);
  32                 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
  33                                 GrabModeAsync, GrabModeSync, None, None);
  34                 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  35                                 GrabModeAsync, GrabModeSync, None, None);
  36                 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  37                                 GrabModeAsync, GrabModeSync, None, None);
  38
  39                 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
  40                                 GrabModeAsync, GrabModeSync, None, None);
  41                 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
  42                                 GrabModeAsync, GrabModeSync, None, None);
  43                 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  44                                 GrabModeAsync, GrabModeSync, None, None);
  45                 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  46                                 GrabModeAsync, GrabModeSync, None, None);
  47
  48                 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
  49                                 GrabModeAsync, GrabModeSync, None, None);
  50                 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
  51                                 GrabModeAsync, GrabModeSync, None, None);
  52                 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  53                                 GrabModeAsync, GrabModeSync, None, None);
  54                 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  55                                 GrabModeAsync, GrabModeSync, None, None);
  56         }
  57         else
  58                 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
  59                                 GrabModeAsync, GrabModeSync, None, None);
  60 }
  61
  62 static Bool
  63 isprotodel(Client *c) {
  64         int i, n;
  65         Atom *protocols;
  66         Bool ret = False;
  67
  68         if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
  69                 for(i = 0; !ret && i < n; i++)
  70                         if(protocols[i] == wmatom[WMDelete])
  71                                 ret = True;
  72                 XFree(protocols);
  73         }
  74         return ret;
  75 }
  76
  77 static void
  78 setclientstate(Client *c, long state) {
  79         long data[] = {state, None};
  80
  81         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
  82                         PropModeReplace, (unsigned char *)data, 2);
  83 }
  84
  85 static int
  86 xerrordummy(Display *dsply, XErrorEvent *ee) {
  87         return 0;
  88 }
  89
  90 /* extern */
  91
  92 void
  93 attach(Client *c) {
  94         if(clients)
  95                 clients->prev = c;
  96         c->next = clients;
  97         clients = c;
  98 }
  99
 100 void
 101 configure(Client *c) {
 102         XConfigureEvent ce;
 103
 104         ce.type = ConfigureNotify;
 105         ce.display = dpy;
 106         ce.event = c->win;
 107         ce.window = c->win;
 108         ce.x = c->x;
 109         ce.y = c->y;
 110         ce.width = c->w;
 111         ce.height = c->h;
 112         ce.border_width = c->border;
 113         ce.above = None;
 114         ce.override_redirect = False;
 115         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 116 }
 117
 118 void
 119 detach(Client *c) {
 120         if(c->prev)
 121                 c->prev->next = c->next;
 122         if(c->next)
 123                 c->next->prev = c->prev;
 124         if(c == clients)
 125                 clients = c->next;
 126         c->next = c->prev = NULL;
 127 }
 128
 129 void
 130 focus(Client *c) {
 131         if(c && !isvisible(c))
 132                 return;
 133         if(sel && sel != c) {
 134                 grabbuttons(sel, False);
 135                 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
 136         }
 137         if(c) {
 138                 detachstack(c);
 139                 attachstack(c);
 140                 grabbuttons(c, True);
 141         }
 142         sel = c;
 143         drawstatus();
 144         if(!selscreen)
 145                 return;
 146         if(c) {
 147                 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
 148                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 149         }
 150         else
 151                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 152 }
 153
 154 void
 155 killclient(const char *arg) {
 156         XEvent ev;
 157
 158         if(!sel)
 159                 return;
 160         if(isprotodel(sel)) {
 161                 ev.type = ClientMessage;
 162                 ev.xclient.window = sel->win;
 163                 ev.xclient.message_type = wmatom[WMProtocols];
 164                 ev.xclient.format = 32;
 165                 ev.xclient.data.l[0] = wmatom[WMDelete];
 166                 ev.xclient.data.l[1] = CurrentTime;
 167                 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
 168         }
 169         else
 170                 XKillClient(dpy, sel->win);
 171 }
 172
 173 void
 174 manage(Window w, XWindowAttributes *wa) {
 175         Client *c, *t = NULL;
 176         Window trans;
 177         Status rettrans;
 178         XWindowChanges wc;
 179
 180         c = emallocz(sizeof(Client));
 181         c->tags = emallocz(ntags * sizeof(Bool));
 182         c->win = w;
 183         c->x = wa->x;
 184         c->y = wa->y;
 185         c->w = wa->width;
 186         c->h = wa->height;
 187         if(c->w == sw && c->h == sh) {
 188                 c->border = 0;
 189                 c->x = sx;
 190                 c->y = sy;
 191         }
 192         else {
 193                 c->border = BORDERPX;
 194                 if(c->x + c->w + 2 * c->border > wax + waw)
 195                         c->x = wax + waw - c->w - 2 * c->border;
 196                 if(c->y + c->h + 2 * c->border > way + wah)
 197                         c->y = way + wah - c->h - 2 * c->border;
 198                 if(c->x < wax)
 199                         c->x = wax;
 200                 if(c->y < way)
 201                         c->y = way;
 202         }
 203         updatesizehints(c);
 204         XSelectInput(dpy, w,
 205                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 206         grabbuttons(c, False);
 207         wc.border_width = c->border;
 208         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
 209         XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
 210         configure(c); /* propagates border_width, if size doesn't change */
 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         c->isbanned = True;
 220         XMoveWindow(dpy, w, c->x + 2 * sw, c->y);
 221         XMapWindow(dpy, w);
 222         setclientstate(c, NormalState);
 223         if(isvisible(c))
 224                 focus(c);
 225         lt->arrange();
 226 }
 227
 228 void
 229 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
 230         float dx, dy, max, min, ratio;
 231         XWindowChanges wc;
 232
 233         if(w <= 0 || h <= 0)
 234                 return;
 235         if(sizehints) {
 236                 if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0) {
 237                         dx = (float)(w - c->basew);
 238                         dy = (float)(h - c->baseh);
 239                         min = (float)(c->minax) / (float)(c->minay);
 240                         max = (float)(c->maxax) / (float)(c->maxay);
 241                         ratio = dx / dy;
 242                         if(max > 0 && min > 0 && ratio > 0) {
 243                                 if(ratio < min) {
 244                                         dy = (dx * min + dy) / (min * min + 1);
 245                                         dx = dy * min;
 246                                         w = (int)dx + c->basew;
 247                                         h = (int)dy + c->baseh;
 248                                 }
 249                                 else if(ratio > max) {
 250                                         dy = (dx * min + dy) / (max * max + 1);
 251                                         dx = dy * min;
 252                                         w = (int)dx + c->basew;
 253                                         h = (int)dy + c->baseh;
 254                                 }
 255                         }
 256                 }
 257                 if(c->minw && w < c->minw)
 258                         w = c->minw;
 259                 if(c->minh && h < c->minh)
 260                         h = c->minh;
 261                 if(c->maxw && w > c->maxw)
 262                         w = c->maxw;
 263                 if(c->maxh && h > c->maxh)
 264                         h = c->maxh;
 265                 if(c->incw)
 266                         w -= (w - c->basew) % c->incw;
 267                 if(c->inch)
 268                         h -= (h - c->baseh) % c->inch;
 269         }
 270         if(w <= 0 || h <= 0)
 271                 return;
 272         if(w == sw && h == sh)
 273                 c->border = 0;
 274         else
 275                 c->border = BORDERPX;
 276         /* offscreen appearance fixes */
 277         if(x > sw)
 278                 x = sw - w - 2 * c->border;
 279         if(y > sh)
 280                 y = sh - h - 2 * c->border;
 281         if(x + w + 2 * c->border < sx)
 282                 x = sx;
 283         if(y + h + 2 * c->border < sy)
 284                 y = sy;
 285         if(c->x != x || c->y != y || c->w != w || c->h != h) {
 286                 c->x = wc.x = x;
 287                 c->y = wc.y = y;
 288                 c->w = wc.width = w;
 289                 c->h = wc.height = h;
 290                 wc.border_width = c->border;
 291                 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 292                 configure(c);
 293                 XSync(dpy, False);
 294         }
 295 }
 296
 297 void
 298 togglefloating(const char *arg) {
 299         if(!sel || lt->arrange == floating)
 300                 return;
 301         sel->isfloating = !sel->isfloating;
 302         lt->arrange();
 303 }
 304
 305 void
 306 updatesizehints(Client *c) {
 307         long msize;
 308         XSizeHints size;
 309
 310         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 311                 size.flags = PSize;
 312         c->flags = size.flags;
 313         if(c->flags & PBaseSize) {
 314                 c->basew = size.base_width;
 315                 c->baseh = size.base_height;
 316         }
 317         else if(c->flags & PMinSize) {
 318                 c->basew = size.min_width;
 319                 c->baseh = size.min_height;
 320         }
 321         else
 322                 c->basew = c->baseh = 0;
 323         if(c->flags & PResizeInc) {
 324                 c->incw = size.width_inc;
 325                 c->inch = size.height_inc;
 326         }
 327         else
 328                 c->incw = c->inch = 0;
 329         if(c->flags & PMaxSize) {
 330                 c->maxw = size.max_width;
 331                 c->maxh = size.max_height;
 332         }
 333         else
 334                 c->maxw = c->maxh = 0;
 335         if(c->flags & PMinSize) {
 336                 c->minw = size.min_width;
 337                 c->minh = size.min_height;
 338         }
 339         else if(c->flags & PBaseSize) {
 340                 c->minw = size.base_width;
 341                 c->minh = size.base_height;
 342         }
 343         else
 344                 c->minw = c->minh = 0;
 345         if(c->flags & PAspect) {
 346                 c->minax = size.min_aspect.x;
 347                 c->maxax = size.max_aspect.x;
 348                 c->minay = size.min_aspect.y;
 349                 c->maxay = size.max_aspect.y;
 350         }
 351         else
 352                 c->minax = c->maxax = c->minay = c->maxay = 0;
 353         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
 354                         && c->maxw == c->minw && c->maxh == c->minh);
 355 }
 356
 357 void
 358 updatetitle(Client *c) {
 359         char **list = NULL;
 360         int n;
 361         XTextProperty name;
 362
 363         name.nitems = 0;
 364         c->name[0] = 0;
 365         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 366         if(!name.nitems)
 367                 XGetWMName(dpy, c->win, &name);
 368         if(!name.nitems)
 369                 return;
 370         if(name.encoding == XA_STRING)
 371                 strncpy(c->name, (char *)name.value, sizeof c->name);
 372         else {
 373                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 374                 && n > 0 && *list)
 375                 {
 376                         strncpy(c->name, *list, sizeof c->name);
 377                         XFreeStringList(list);
 378                 }
 379         }
 380         XFree(name.value);
 381 }
 382
 383 void
 384 unmanage(Client *c) {
 385         Client *nc;
 386
 387         /* The server grab construct avoids race conditions. */
 388         XGrabServer(dpy);
 389         XSetErrorHandler(xerrordummy);
 390         detach(c);
 391         detachstack(c);
 392         if(sel == c) {
 393                 for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
 394                 focus(nc);
 395         }
 396         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 397         setclientstate(c, WithdrawnState);
 398         free(c->tags);
 399         free(c);
 400         XSync(dpy, False);
 401         XSetErrorHandler(xerror);
 402         XUngrabServer(dpy);
 403         lt->arrange();
 404 }